Ceiling recessed fan and control method and control apparatus thereof, and recessed air conditioner

Abstract

Disclosed are a ceiling recessed fan, a control method and control apparatus thereof, and a recessed air conditioner, wherein the ceiling recessed fan includes a main body frame and an air outlet assembly. An air outlet duct is disposed in the main body frame, the air outlet duct having a first end and a second end along the airflow direction of the air outlet duct; the air outlet assembly is arranged in the main body frame in a way so as to be able to be raised and lowered. The ceiling recessed fan provided in the embodiments of the present disclosure, when in a cooling mode, limits the ratio of the height of an air outlet to the width of the first end of the air outlet duct; that is, design standards are defined for the ceiling recessed fan so as to balance the attenuation of the air supply distance and the air output volume of the ceiling recessed fan, such that the produced air output effect of the ceiling recessed fan satisfies requirements when in a cooling mode; furthermore, because an air deflector may adjust the height of the air outlet, by limiting the ratio range of a minimum value of the air outlet to the width of the first end of the air outlet duct so as to limit the dimensions and rotational angle of the air deflector, in the end, the produced air output effect of the ceiling recessed fan reaches a preset level.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] The present application is based on and claims priority to China Patent Application No. 202210384810.6 filed on April 13, 2022; China Patent Application No. 20221077060.9 filed on July 4, 2022; China Patent Application No. 20221077067.0 filed on July 4, 2022; China Patent Application No. 20221077107.1 filed on July 4, 2022; China Patent Application No. 20221077108.6 filed on July 4, 2022; China Patent Application No. 202210777069.X filed on July 4, 2022; China Patent Application No. 202211048419.5 filed on August 30, 2022; China Patent Application No. 202210260142.6 filed on March 16th, 2022; China Patent Application No. 20221077040.1 filed on July 4, 2022; and China Patent Application No. 20221077084.4 filed on July 4, 2022, the disclosures of which are incorporated by reference herein in its entirety.Field of the Invention

[0002] The present disclosure relates to the technical field of an air treatment device, in particular to a control method and control apparatus of a ceiling recessed fan, a ceiling recessed fan and a recessed air conditioner.Description of Related Art

[0003] The ceiling recessed fan which pertains to an air conditioner, is embedded mounted in the ceiling to reduce the occupied space, and exchanges air output heat through the air outlet provided on the surface of the ceiling recessed fan. With the limitation by the position of its air outlet, it is only possible to output air according to a set direction, rather than performing horizontal blow during cooling.

[0004] In the related art, in order to enable the ceiling recessed fan to perform horizontal blow in a cooling mode so that the airflow flows against the wall, the technical solution in use is to arrange the air outlet assembly to be a structure in a way so as to be able to be raised and lowered, and the main body frame is fixedly arranged on a circumferential outer side of the air outlet assembly. During operation of the ceiling recessed fan, the air outlet assembly descends to a certain height and forms a height difference with the main body frame, and the air outlet assembly and the main body frame arranged on an outer side of the air outlet assembly form an air outlet, and the fan blows air from the inside of the ceiling recessed fan and outputs air through the air outlet. When the air conditioner is in a cooling mode, it is necessary to make the outlet air parallel to the horizontal plane as much as possible to increase the air supply distance, so as to realize waterfall cooling and improve the comfort of the user.

[0005] However, the descending height of the air outlet frame of the ceiling recessed fan in the related art is only the experience design of the designer, without considering a cooperation relationship with the internal structure of the ceiling recessed fan. Moreover, when the dimension of the air outlet formed between the air outlet frame and the main body frame is too large, in a cooling mode, although the air output volume attenuates less, the air supply distance is very small, which results in a poor air output effect of the ceiling recessed fan.

[0006] At present, the air outlet assembly of the ceiling recessed fan in the related art is a structure in a way so as to be able to be raised and lowered, and the main body frame is fixedly arranged on a circumferential outer side of the air outlet assembly. During operation of the ceiling recessed fan, the air outlet assembly descends by a certain height and forms a height difference with the main body frame, and the air outlet assembly and the main body frame arranged on an outer side of the air outlet assembly form an air outlet, so that the fan blows air from the inside of the ceiling recessed fan and outputs air through the air outlet, and the airflow is deflected by the air deflector at the air outlet. Especially when the air conditioner is in a cooling mode, it is necessary to make the outlet air parallel to the horizontal plane as much as possible to increase the air supply distance, so as to realize waterfall cooling and improve the comfort of the user. However, the air deflector of the ceiling recessed fan in the related art when designed adjusts the air output direction of the ceiling recessed fan according to the angle of the air deflector alone, without considering the influence of the internal structure of the ceiling recessed fan on the air output direction of the ceiling recessed fan. When the upward reflex angle of the air deflector is too large, the air output volume will be affected as the air output directly blows to the wall. When the downward swing angle of the air deflector is too large, the air supply distance will be reduced, which eventually results in a poor air output effect of the ceiling recessed fan.

[0007] At present, the air outlet assembly of the ceiling recessed fan in the related art is a structure in a way so as to be able to be raised and lowered, and the main body frame is fixedly arranged on a circumferential outer side of the air outlet assembly. During operation of the ceiling recessed fan, the air outlet assembly descends to a certain height and forms a height difference with the main body frame, and the air outlet assembly and the main body frame arranged on an outer side of the air outlet assembly form an air outlet, and the fan blows air from the inside of the ceiling recessed fan and outputs air through the air outlet. When the air conditioner is in a cooling mode, it is necessary to make the outlet air parallel to the horizontal plane as much as possible to increase the air supply distance, so as to realize waterfall cooling and improve the comfort of the user. However, the dimension of the air outlet of the ceiling recessed fan in the related art which is only the experience design of the designer, is not designed reasonably, which results in a poor air output effect of the ceiling recessed fan.

[0008] In the related art, in order to enable the ceiling recessed fan to perform horizontal blow in a cooling mode so that the airflow flows against the wall, the technical solution in use is to arrange the air outlet assembly to be a structure in a way so as to be able to be raised and lowered, and the main body frame is fixedly arranged on a circumferential outer side of the air outlet assembly. During operation of the ceiling recessed fan, the air outlet assembly descends by a certain height and forms a height difference with the main body frame, and the air outlet assembly and the main body frame arranged on an outer side of the air outlet assembly form an air outlet, so that the fan blows air from the inside of the ceiling recessed fan and outputs air through the air outlet, and the airflow is deflected by the air deflector at the air outlet. Especially when the air conditioner is in a cooling mode, it is necessary to make the outlet air parallel to the horizontal plane as much as possible to increase the air supply distance, so as to realize waterfall cooling and improve the comfort of the user.

[0009] However, the air deflector of the ceiling recessed fan in the related art when designed adjusts the air output direction of the ceiling recessed fan according to the angle of the air deflector alone, without considering the influence of the air deflector and the mounting planar face of the internal structure of the ceiling recessed fan on the air output direction of the ceiling recessed fan. When the upward reflex angle of the air deflector is too large, the air output volume will be affected as the air output directly blows to the wall. When the downward swing angle of the air deflector is too large, the air supply distance will be reduced, which eventually results in a poor air output effect of the ceiling recessed fan.

[0010] In the related art, in order to enable the ceiling recessed fan to perform horizontal blow in a cooling mode so that the airflow flows against the wall, the technical solution in use is to arrange the air outlet assembly to be a structure in a way so as to be able to be raised and lowered, and the main body frame is fixedly arranged on a circumferential outer side of the air outlet assembly. During operation of the ceiling recessed fan, the air outlet assembly descends to a certain height and forms a height difference with the main body frame, and the air outlet assembly and the main body frame arranged on an outer side of the air outlet assembly form an air outlet, and the fan blows air from the inside of the ceiling recessed fan and outputs air through the air outlet. When the air conditioner is in a cooling mode, it is necessary to make the outlet air parallel to the horizontal plane as much as possible to increase the air supply distance, so as to realize waterfall cooling and improve the comfort of the user.

[0011] However, the descending height of the air outlet frame of the ceiling recessed fan in the related art is only the experience design of the designer, without considering a cooperation relationship with the internal structure of the ceiling recessed fan. Moreover, when the dimension of the air outlet formed between the air outlet frame and the main body frame is too large, in a cooling mode, although the air output volume attenuates less, the air supply distance is very small, which results in a poor air output effect of the ceiling recessed fan.

[0012] At present, the air outlet assembly of the ceiling recessed fan in the related art is a structure in a way so as to be able to be raised and lowered, and the main body frame is fixedly arranged on a circumferential outer side of the air outlet assembly. During operation of the ceiling recessed fan, the air outlet assembly descends to a certain height and forms a height difference with the main body frame, and the air outlet assembly and the main body frame arranged on an outer side of the air outlet assembly form an air outlet, and the fan blows air from the inside of the ceiling recessed fan and outputs air through the air outlet. When the air conditioner is in a cooling mode, it is necessary to make the outlet air parallel to the horizontal plane as much as possible to increase the air supply distance, so as to realize waterfall cooling and improve the comfort of the user. However, the dimension of the air outlet of the ceiling recessed fan in the related art which is only the experience design of the designer, is not designed reasonably, which results in a poor air output effect of the ceiling recessed fan.

[0013] The ceiling recessed fan, also known as a ceiling cassette air conditioner or a ceiling concealed / embedded air conditioner. The ceiling recessed fan is widely applied as it saves the space and provides an aesthetic feeling.

[0014] At present, an air outlet is formed between the air outlet assembly and the main body frame of the ceiling recessed fan in the related art, and the fan blows air from the inside of the ceiling recessed fan and horizontally outputs air through the air outlet, thus reducing the discomfort caused by direct skin blow of cold air. However, a horizontal blow method with cold air may result in that it is impossible to cool indoor rapidly, thereby affecting the user experience.

[0015] The inventors have found that, an effective solution is not provided at present to solve the problem that it is impossible to cool indoor rapidly by a horizontal blow method with cold air in the related art.

[0016] At present, the ceiling recessed fan often uses such a method that the air outlet is arranged on the side frame, and the number of air outlets is generally four, so that air is supplied from the ceiling to indoor at a certain angle, that is, air is supplied in four directions along the angles set by the four air outlets respectively. However, since an included angle is formed between the air output direction of the air outlet and the horizontal plane where the ceiling is located, and the air supply direction is limited, when the air conditioner is in a cooling mode, cold air will directly blow downward, and if someone is in the vicinity of the air conditioner, cold air will directly blow to the skin, which results in reduced comfort.

[0017] To that end, there is an existing ceiling recessed fan with an air outlet assembly arranged in a way so as to be able to be raised and lowered. The ceiling recessed fan includes a main body frame and an air outlet assembly mounted on the ceiling, and the air outlet assembly is mounted on the main body frame through a lifting mechanism. When the ceiling recessed fan outputs air, the air outlet assembly is driven by the lifting mechanism to descend relative to the main body frame, and after the air outlet assembly descends, its outer edge and the inner edge of the main body frame form a horizontal air outlet, so that air is output by horizontal blow, and waterfall refrigeration is realized, thereby improving the comfort of the user.

[0018] However, in order to allow a smooth lifting movement between the air outlet assembly and the main body frame, a movement gap has to be retained between the lifting assembly and the main body frame. With the presence of the movement gap, the movement gap is not sealed in the structure in the related art, and the air outlet may communicate with the air return gate through the movement gap, which will lead to air output entering the air return gate through the movement gap so that it is likely to cause condensation.

[0019] Moreover, when the air outlet assembly descends to an operation position, since almost all the gravity of the air outlet assembly is borne by the lifting mechanism, and the weight of the air outlet assembly is also relatively heavy in normal circumstances, the lifting mechanism is very likely to be damaged.

[0020] The embedded air conditioner is also known as a ceiling cassette air conditioner or a ceiling concealed air conditioner. The embedded air conditioner is widely applied as it saves the space and provides an aesthetic feeling.

[0021] At present, the embedded air conditioner often uses such a method that the air outlet is arranged on the side frame, and the number of air outlets is generally four, so that air is supplied from the ceiling to indoor at a certain angle, that is, air is supplied in four directions along the angles set by the four air outlets respectively. However, since an included angle is formed between the air output direction of the air outlet and the horizontal plane where the ceiling is located, and the air supply direction is limited, when the air conditioner is in a cooling mode, cold air will directly blow downward, and if someone is in the vicinity of the air conditioner, cold air will directly blow to the skin, which results in reduced comfort.

[0022] There is an embedded air conditioner with an air outlet assembly arranged in a way so as to be able to be raised and lowered. The embedded air conditioner includes a main body frame and an air outlet assembly mounted on the ceiling, and the air outlet assembly is mounted on the main body frame through a lifting mechanism. When the embedded air conditioner outputs air, the air outlet assembly is driven by the lifting mechanism to descend relative to the main body frame, and after the air outlet assembly descends, its outer edge and the inner edge of the main body frame form a horizontal air outlet, so that air is output by horizontal blow, and waterfall refrigeration is realized, thereby improving the comfort of the user.

[0023] However, the inventors have found that, there may be present with a vibration phenomenon during the lifting process of the air outlet assembly, which will lead to noise and affect the service life of the embedded air conditioner. Therefore, how to solve the vibration of the air outlet assembly during the lifting process is an urgent problem to be solved.

[0024] The ceiling recessed fan which pertains to an air conditioner, is recessedly installed in the ceiling to reduce the occupied space, and performs air output heat exchange through the air outlet provided on the surface of the ceiling recessed fan. With the limitation by the position of its air outlet, it is only possible to perform air output according to a set direction, rather than performing horizontal blow during cooling. Especially for business occasions, skin blow by cold air during downdraft airflow cooling will make people uncomfortable, and skin blow by cold air for a long time is likely to lead to colds and other diseases.SUMMARY OF THE INVENTION

[0025] In some embodiments of the disclosure, a ceiling recessed fan, a control method and control apparatus thereof, and a recessed air conditioner are provided.

[0026] In some embodiments of the present disclosure, a ceiling recessed fan is provided to improve the air output effect of the ceiling recessed fan.

[0027] According to a first aspect of the present disclosure, a ceiling recessed fan is provided. The ceiling recessed fan includes: a main body frame internally provided with an air outlet duct, wherein the air outlet duct has a first end and a second end along an airflow direction; an air outlet assembly arranged in the main body frame, wherein when the ceiling recessed fan is in a cooling mode, there is a height difference between the air outlet assembly and the main body frame, and an air outlet is formed between the air outlet assembly and the main body frame, and the air outlet communicates with a second end of the air outlet duct; the ratio of the height h1 of the air outlet to the width h2 of a first end of the air outlet duct is in the range of 1 / 3≤h1 / h2≤3 / 5.

[0028] In some embodiments, the air outlet assembly is arranged in the main body frame in a way so as to be able to be raised and lowered, and the air outlet assembly has an operation position descending to a set height to form a height difference. When the air outlet assembly is in an operation position, the ratio range of the height h1 of the air outlet to the width h2 of the first end of the air outlet duct is 1 / 3≤h1 / h2≤3 / 5.

[0029] In some embodiments, the air outlet assembly includes an air deflector and an air outlet frame, wherein the air outlet frame is arranged in the main body frame; the air deflector is rotatably arranged on the air outlet frame; and when the air outlet assembly is in an operation position, the air deflector may adjust the height of the air outlet.

[0030] In some embodiments, the air deflector has a first position to allow the height h1 of the air outlet to reach a minimum value, and the ratio of the minimum height h1 of the air outlet to the width of a first end of the air outlet duct is in the range of 1 / 3≤h1 / h2≤3 / 5.

[0031] In some embodiments, when the ceiling recessed fan is in a cooling mode, the angle range of the included angle a between the plane where the air deflector is located and the horizontal plane is - 10°≤a≤10°, and when a=0°, the plane where the air deflector is located is parallel to the horizontal plane.

[0032] In some embodiments, when the ceiling recessed fan is in a cooling mode, the included angle a in the angle range of 10°≥a > 0°, and when a > 0°, the air deflector tilts upwards relative to the horizontal plane.

[0033] In some embodiments, the air outlet assembly has a closed position to close the air outlet in cooperation with the main body frame, and the air deflector has a first edge and a second edge. When the air outlet assembly is in the closed position, the first edge is sealed with a corresponding position of the main body frame, and the second edge is sealed with a corresponding edge of the air outlet frame.

[0034] In some embodiments, when the air outlet assembly is in the closed position, the air outlet frame and the air deflector jointly cooperate with the main body frame to form a seal.

[0035] In some embodiments, the second edge is provided with a first step structure, and the air outlet frame is provided with a second step structure fit with the first step structure. When the air outlet assembly is in the closed position, the first step structure is sealingly fit with the second step structure.

[0036] In some embodiments, the first step structure is provided with a seal, and when the air outlet assembly is in the closed position, the seal is arranged between the first step structure and the second step structure.

[0037] In some embodiments, the ceiling recessed fan also includes a lifting mechanism arranged in the main body frame, and the air outlet assembly is arranged on the lifting mechanism.

[0038] In some embodiments, the air outlet assembly includes an air outlet frame, wherein an air outlet is formed between the air outlet frame and the main body frame, and the air outlet frame is lifted independently.

[0039] In some embodiments, the air outlet assembly includes an air outlet frame and an air return panel, wherein an air outlet is formed between the air outlet frame and the main body frame, the air return panel is provided with an air return gate, and the air outlet frame and the air return panel are connected and lifted together.

[0040] The ceiling recessed fan with a cooling mode provided in the present disclosure, when in a cooling mode, limits the ratio of the height of an air outlet to the width of the first end of the air outlet duct; that is, design standards are provided for the ceiling recessed fan so as to balance the attenuation of the air supply distance and the air output volume of the ceiling recessed fan, such that the produced air output effect of the ceiling recessed fan satisfies requirements when in a cooling mode; furthermore, because an air deflector can adjust the height of the air outlet, by limiting the ratio range of a minimum value of the height of the air outlet to the width of the first end of the air outlet duct so as to limit the rotational angle of the air deflector, in the end, the produced air output effect of the ceiling recessed fan reaches a preset level.

[0041] According to a second aspect of the present disclosure, a ceiling recessed fan is provided. The ceiling recessed fan includes: a main body frame internally provided with an air outlet duct, wherein the air outlet duct has a first end and a second end along an airflow direction; an air outlet assembly arranged in the main body frame, wherein when the ceiling recessed fan is in a heating mode, there is a height difference between the air outlet assembly and the main body frame, and an air outlet is formed between the air outlet assembly and the main body frame, and the air outlet communicates with a second end of the air outlet duct; the ratio of the height h1 of the air outlet to the width h2 of a first end of the air outlet duct is in the range of 2 / 3≤h1 / h2≤4 / 5.

[0042] In some embodiments, the air outlet assembly is arranged in the main body frame in a way so as to be able to be raised and lowered, and the air outlet assembly has an operation position descending to a set height to form a height difference. When the air outlet assembly is in an operation position, the ratio range of the height h1 of the air outlet to the width h2 of the first end of the air outlet duct is 2 / 3≤h1 / h2≤4 / 5.

[0043] In some embodiments, the air outlet assembly includes an air deflector and an air outlet frame, wherein the air outlet frame is arranged in the main body frame; the air deflector is rotatably arranged on the air outlet frame; and when the air outlet assembly is in an operation position, the air deflector may adjust the height of the air outlet.

[0044] In some embodiments, the air deflector has a first position to allow the height h1 of the air outlet to reach a minimum value, and the ratio of the minimum height h1 of the air outlet to the width of a first end of the air outlet duct is in the range of 2 / 3≤h1 / h2≤4 / 5.

[0045] In some embodiments, when the ceiling recessed fan is in a heating mode, the included angle a between the air deflector 4a and the horizontal plane is in the angle range of 45° to 75°.

[0046] In some embodiments, the air outlet assembly has a closed position to close the air outlet in cooperation with the main body frame, and the air deflector has a first edge and a second edge. When the air outlet assembly is in the closed position, the first edge is sealed with a corresponding position of the main body frame, and the second edge is sealed with a corresponding edge of the air outlet frame.

[0047] In some embodiments, when the air outlet assembly is in the closed position, the air outlet frame and the air deflector jointly cooperate with the main body frame to form a seal.

[0048] In some embodiments, the second edge is provided with a first step structure, and the air outlet frame is provided with a second step structure fit with the first step structure. When the air outlet assembly is in the closed position, the first step structure is sealingly fit with the second step structure.

[0049] In some embodiments, the first step structure is provided with a seal, and when the air outlet assembly is in the closed position, the seal is arranged between the first step structure and the second step structure.

[0050] In some embodiments, the ceiling recessed fan also includes a lifting mechanism arranged in the main body frame, and the air outlet assembly is arranged on the lifting mechanism.

[0051] In some embodiments, the air outlet assembly includes an air outlet frame, wherein an air outlet is formed between the air outlet frame and the main body frame, and the air outlet frame is lifted independently.

[0052] In some embodiments, the air outlet assembly includes an air outlet frame and an air return panel, wherein an air outlet is formed between the air outlet frame and the main body frame, the air return panel is provided with an air return gate, and the air outlet frame and the air return panel are connected and lifted together.

[0053] The ceiling recessed fan with a heating mode provided in the present disclosure, when in a heating mode, limits the ratio of the height of the air outlet to the width of the first end of the air outlet duct to provide design standards for the ceiling recessed fan, such that the produced air output effect of the ceiling recessed fan satisfies requirements in a heating code to improve the heat exchange efficiency of the ceiling recessed fan in a heating mode; furthermore, because an air deflector can adjust the height of the air outlet, by limiting the ratio range of a minimum value of the air outlet to the width of the first end of the air outlet duct so as to limit the dimensions and rotational angle of the air deflector, in the end, the produced air output effect of the ceiling recessed fan reaches a preset level.

[0054] According to a third aspect of the present disclosure, a ceiling recessed fan is provided. The ceiling recessed fan includes: a main body frame; and an air outlet assembly arranged in the main body frame in a way so as to be able to be raised and lowered. Moreover, the air outlet assembly has an operation position descending to a set height and forming an air outlet with the main body frame. When the height h1 of the air outlet is in the range of 20mm≤h1≤36mm, the air output volume of the ceiling recessed fan is greater than or equal to 75% of a rated air output volume of the ceiling recessed fan.

[0055] In some embodiments, the height h1 of the air outlet is in the range of 20mm≤h1≤36 mm.

[0056] In some embodiments, the air outlet assembly includes a rotatable air deflector, and the air deflector and the main body frame form an air outlet.

[0057] In some embodiments, when the ceiling recessed fan is in a cooling mode, the angle range of the included angle a between the plane where the air deflector is located and the horizontal plane is - 10°≤a≤10°, and when a=0°, the plane where the air deflector is located is parallel to the horizontal plane.

[0058] In some embodiments, the ceiling recessed fan also includes a rotating mechanism arranged on the air outlet assembly, and the air deflector is arranged on the rotating mechanism.

[0059] In some embodiments, the rotating mechanism includes a rotary arm, one end of which is hinged to the air outlet assembly, and the other end of which is arranged on the air deflector.

[0060] In some embodiments, the rotating mechanism also includes a driving member arranged on the air outlet assembly and drivingly connected with the rotary arm.

[0061] In some embodiments, the air outlet assembly includes an air outlet frame, the air deflector is rotatably arranged on the air outlet frame, and a step sealing structure is provided between an edge of the air deflector and the air outlet frame.

[0062] In some embodiments, the edge of the air deflector is provided with a first step structure, and the air outlet frame is provided with a second step structure, so that the first step structure and the second step structure are fit to form the step sealing structure.

[0063] In some embodiments, a sealing member is provided between the first step structure and the second step structure.

[0064] In some embodiments, the air outlet assembly includes an air outlet frame, wherein an air outlet is formed between the air outlet frame and the main body frame, and the air outlet frame is lifted independently.

[0065] In some embodiments, the air outlet assembly includes an air outlet frame and an air return panel, wherein an air outlet is formed between the air outlet frame and the main body frame, the air return panel is provided with an air return gate, and the air outlet frame and the air return panel are connected and lifted together.

[0066] The ceiling recessed fan provided in the present disclosure limits the relationship between the height of the air outlet and the target air output volume to provide design standards for the ceiling recessed fan so as to balance the attenuation of the air supply distance and the air output volume of the ceiling recessed fan, such that the produced air output effect of the ceiling recessed fan satisfies requirements; furthermore because the relationship between the height of the air outlet and the target air velocity of the air output is limited, selection standards of the fan are provided for the ceiling recessed fan, so as to reduce the design difficulties without wasting the air volume due to the selection of a fan that is too large, which effectively reduces the energy consumption of the ceiling recessed fan. Because the air deflector can adjust the height of the air outlet, by limiting the relationship between the angle a and the height of the air outlet so as to limit the rotational angle of the air deflector, in the end, the produced air output effect of the ceiling recessed fan reaches a preset level.

[0067] According to a fourth aspect of the present disclosure, a ceiling recessed fan is provided. The ceiling recessed fan includes: a main body frame, wherein the main body frame is formed with an air outlet duct, and the main body frame includes a side frame with a first edge forming the lowermost point of the air outlet duct; an air outlet assembly arranged in the main body frame in a way so as to be able to be raised and lowered, wherein the air outlet assembly descends so that a first air outlet is formed between the air outlet assembly and the main body frame; the relationship between the width D of the outer edge of the air outlet assembly beyond the first edge and the height h1 of the air outlet is 2 / 5≤D / h1≤9 / 5.

[0068] In some embodiments, when the air outlet assembly descends so that a first air outlet is formed between the air outlet assembly and the main body frame, a gap which is formed between the air outlet assembly and the main body frame, forms an air supply duct. One end of the air supply duct communicates with the air outlet duct, and the other end of the air supply duct forms a first air outlet.

[0069] In some embodiments, when the air outlet assembly descends so that a first air outlet is formed between the air outlet assembly and the main body frame, an air supply duct is formed between the air outlet assembly and the side frame. The projection of the air outlet assembly at least partially coincides with the projection of the side frame on the mounting planar face of the main body frame.

[0070] In some embodiments, the air outlet assembly is provided with a second air outlet, and the second air outlet is provided with an air deflector which is rotatably arranged at the second air outlet and capable of closing or opening the second air outlet.

[0071] In some embodiments, a step sealing structure is provided between the edge of the air deflector and the edge of the second air outlet.

[0072] In some embodiments, the edge of the air deflector is provided with a first step structure, and the edge of the second air outlet is provided with a second step structure, so that the first step structure and the second step structure are fit to form a step sealing structure.

[0073] In some embodiments, the ceiling recessed fan also includes a lifting mechanism arranged in the main body frame, and the air outlet assembly is arranged on the lifting mechanism.

[0074] In some embodiments, the air outlet assembly includes an air outlet frame, wherein a first air outlet is formed between the air outlet frame and the main body frame, and the air outlet frame is lifted independently.

[0075] In some embodiments, the air outlet assembly includes an air outlet frame and an air return panel, wherein a first air outlet is formed between the air outlet frame and the main body frame, the air return panel is provided with an air return gate, and the air outlet frame and the air return panel are connected and lifted together.

[0076] In the ceiling recessed fan provided by the present disclosure, the part of the projection of the air deflector on the main body frame is located on the side frame. Also that is, the tilting downward air output of the ceiling recessed fan is deflected to horizontal flow as much as possible by increasing the dimensions of the air deflector, so that the air output of the ceiling recessed fan flows along a horizontal direction to a maximum extent, which effectively enhances the air deflection effect of the air deflector over the air output of the ceiling recessed fan. Moreover, according to a ratio relationship between the dimension of the air deflector and the height of the air outlet, the dimensions of the air deflector can be directly determined, thereby improving the air deflection effect of the air deflector over the air output of the ceiling recessed fan.

[0077] According to a fifth aspect of the present disclosure, a ceiling recessed fan is provided, which includes: a main body frame; an air outlet assembly arranged in the main body frame, wherein when the ceiling recessed fan is in a cooling mode, a height difference is formed between the air outlet assembly and the main body frame, and an air outlet is formed between the air outlet assembly and the main body frame; and a first air deflector arranged on a swinging mechanism, and swingably arranged at the air outlet. The angle c between the plane of the first air deflector and the mounting planar face of the main body frame is in the range of -10°≤c≤10°, and when the angle c is 0°, the plane of the first air deflector is parallel to the mounting planar face. The air outlet assembly has a first descending height h, and the first descending height h is in the range of 20mm≤h≤36mm when the ceiling recessed fan is in a cooling mode.

[0078] In some embodiments, when the angle c is in the range of -10°≤c < 0°, the plane of the first air deflector tilts upward relative to the mounting planar face, and the first descending height h is in the range of 20mm≤h≤28mm. Alternatively, when the angle c is in the range of 0°≤c < 10°, the first descending height h is in the range of 20mm≤h≤36mm.

[0079] In some embodiments, the air outlet assembly is arranged in the main body frame in a way so as to be able to be raised and lowered, and the air outlet assembly has an operation position descending to a set height to form a height difference.

[0080] In some embodiments, the mounting planar face of the main body frame is parallel to the horizontal plane.

[0081] In some embodiments, the first air deflector is provided with an extension plate projecting out of the first air deflector when the air outlet assembly is in the operation position.

[0082] In some embodiments, the ceiling recessed fan also includes an air deflection structure arranged in the main body frame, and capable of deflecting the air output of the air outlet when the ceiling recessed fan is in a cooling mode.

[0083] In some embodiments, the main body frame includes a side frame, at least part of the air output of the air outlet passes through the side frame, and the air deflecting structure includes a second air deflector swingably arranged on the side frame; or the main body frame includes a side frame, at least part of the air output of the air outlet passes through the side frame, and the side frame is formed with an air deflecting channel which constitutes the air deflecting structure.

[0084] According to a sixth aspect of the present disclosure, a ceiling recessed fan is provided, which includes: a main body frame; an air outlet assembly arranged in the main body frame, wherein when the ceiling recessed fan is in a cooling mode, a height difference is formed between the air outlet assembly and the main body frame, and an air outlet is formed between the air outlet assembly and the main body frame; and a first air deflector arranged on a swinging mechanism, and swingably arranged at the air outlet. The plane of the first air deflector tilts upward relative to the mounting planar face of the main body frame, and the angle c between the plane of the first air deflector and the mounting planar face is in the range of -10°≤c≤0°.

[0085] In some embodiments, the air outlet assembly is arranged in the main body frame in a way so as to be able to be raised and lowered, and the air outlet assembly has an operation position descending to a set height to form a height difference.

[0086] In some embodiments, the air outlet assembly has a first descending height h, and the first descending height h is in the range of 20mm≤h≤28mm when the ceiling recessed fan is in a cooling mode.

[0087] In the ceiling recessed fan provided by the present disclosure, the air output of the ceiling recessed fan is deflected by the first air deflector, and by limiting the angle relationship between the plane where the first air deflector is located and the mounting planar face of the main body frame, the first air deflector tilts towards the mounting planar face of the main body frame, so as to allow that the air output of the ceiling recessed fan faces towards the mounting planar face of the main body frame as much as possible, thereby improving the air output effect of the ceiling recessed fan. At the same time, according to the relationship between the air output volume of the ceiling recessed fan and the angle c or the relationship between the height of the air outlet assembly and the angle c, the air output effect of the ceiling recessed fan is further improved according to actual requirements of the ceiling recessed fan.

[0088] According to a seventh aspect of the present disclosure, a ceiling recessed fan is provided. The ceiling recessed fan includes: a main body frame; an air outlet assembly disposed on the main body frame in a way so as to be able to be raised and lowered, and having an operation position that descends to a predetermined height and forms an air outlet with the main body frame; an air deflection structure arranged in the main body frame, and capable of deflecting the air output of the air outlet when the ceiling recessed fan is in a cooling mode.

[0089] In some embodiments, the main body frame includes a side frame, at least part of the air output of the air outlet passes through the side frame, and the air deflection structure includes a first air deflector swingably arranged on the side frame.

[0090] In some embodiments, the plane where the first air deflector is located tilts upward relative to the horizontal plane to form a tilting angle d, and the angle range of the tilting angle d is 0°<d≤10°; and / or, the plane where the first air deflector is located is parallel to the horizontal plane.

[0091] In some embodiments, the air outlet assembly also includes a second air deflector swingably arranged at the air outlet. The included angle e between the plane of the first air deflector and the plane of the second air deflector is in the angle range of -10°≤e≤10°, and when e=0°, the plane of the first air deflector is parallel to the plane of the second air deflector.

[0092] In some embodiments, the main body frame includes a side frame, at least part of the air output of the air outlet passes through the side frame, and an air deflection channel formed on the side frame constitutes an air deflection structure.

[0093] In some embodiments, the width of the air deflection channel gradually increases along the air output direction; and / or, the depth of the air deflection channel is gradually increased.

[0094] In some embodiments, the air outlet assembly includes an air outlet frame, wherein an air outlet is formed between the air outlet frame and the main body frame, and the air outlet frame is lifted independently.

[0095] In some embodiments, the air outlet assembly includes an air outlet frame and an air return panel, wherein an air outlet is formed between the air outlet frame and the main body frame, the air return panel is provided with an air return gate, and the air outlet frame and the air return panel are connected and lifted together.

[0096] In the ceiling recessed fan provided by the present disclosure, the airflow passing through the side frame is deflected by providing an air deflecting structure, thereby solving a phenomenon that the airflow cannot favorably flow against the ceiling because the main body frame projects out of the ceiling. At the same time, the first air deflector can adjust the flow direction of the upper layer airflow at the air outlet, and effectively increase the air supply distance of the air outlet by joint cooperation with the second air deflector. The air deflection channel can utilize the change of the width or the depth so that the upper layer airflow at the air outlet flows towards the ceiling direction or the corner of the ceiling recessed fan, thereby effectively increasing the air supply distance and the air supply angle of the ceiling recessed fan and increasing the air output effect of the ceiling recessed fan.

[0097] According to an eighth embodiment of the present disclosure, a ceiling recessed fan is provided. The ceiling recessed fan includes: internally provided with an air outlet duct having a first end and a second end provided along the airflow direction; an air outlet assembly arranged in the main body frame in a way so as to be able to be raised and lowered, and the air outlet assembly has an operation position that descends to a predetermined height, wherein an air outlet is formed between the air outlet assembly and the main body frame, and the air outlet communicates with the second end of the air outlet duct; a second air deflector swingably arranged in the air outlet duct and capable of changing an air output direction of the air outlet duct; and a first air deflector swingably arranged on the air outlet assembly and capable of adjusting a height of the air outlet when the air outlet assembly is in an operation position. When the air outlet assembly is in an operation position, an included angle c is formed between the plane where the first air deflector is located and the plane where the second air deflector is located.

[0098] In some embodiments, the ceiling recessed fan has a cooling mode. When the ceiling recessed fan is in a cooling mode, the included angle c is in the range of 90° to 110°.

[0099] In some embodiments, the ceiling recessed fan has a heating mode. When the ceiling recessed fan is in a heating mode, the included angle c is in the range of 145° to 165°.

[0100] In some embodiments, the air outlet assembly has a closed position to close the air outlet in cooperation with the main body frame, and the first air deflector has a first edge and a second edge. When the air outlet assembly is in the closed position, the first edge is sealed with a corresponding position of the main body frame, and the second edge is sealed with a corresponding edge of the air outlet assembly.

[0101] In some embodiments, the first air deflector has a first edge and a second edge. When the air outlet assembly is in the closed position, the first edge is sealed with a corresponding edge of the main body frame, and the second edge is sealed with a corresponding edge of the air outlet assembly.

[0102] In some embodiments, the second edge is provided with a first step structure, and the air outlet assembly is provided with a second step structure fit with the step structure. When the air outlet assembly is in the closed position, the first step structure is sealingly fit with the second step structure.

[0103] In some embodiments, the first step structure is provided with a seal, and when the air outlet assembly is in the closed position, the seal is arranged between the first step structure and the second step structure.

[0104] In some embodiments, the ceiling recessed fan also includes a swinging mechanism arranged on the air outlet assembly, and the first air deflector is arranged on the swinging mechanism.

[0105] In some embodiments, the swinging mechanism includes a rotary arm, one end of which is hinged to the air outlet assembly, and the other end of which is arranged on the air deflector.

[0106] In some embodiments, the swinging mechanism also includes a driving member arranged on the air outlet assembly and directly or indirectly driving the rotary arm to rotate.

[0107] In some embodiments, the second air deflector divides the air outlet duct into a first air outlet duct and a second air outlet duct.

[0108] In some embodiments, along the airflow direction of the air outlet duct, the width of the first air outlet duct gradually decreases; and / or along the airflow direction of the air outlet duct, the width of the second air outlet duct gradually decreases.

[0109] In some embodiments, the ceiling recessed fan has a cooling mode, and when the ceiling recessed fan is in a cooling mode, the ratio of the average width D1 of the first air outlet duct to the average width D2 of the second air outlet duct is in the range of 1.0≤D1 / D2≤1.1; and / or, the ceiling recessed fan has a heating mode, and when the ceiling recessed fan is in a heating mode, the ratio of the average width D1 of the first air outlet duct to the average width D2 of the second air outlet duct is in the range of 1.2≤D1 / D2≤1.25.

[0110] In some embodiments, the ceiling recessed fan has a cooling mode, and when the ceiling recessed fan is in a cooling mode, the included angle between the second air deflector and the vertical surface is in the range of 0° to 20°; and the ceiling recessed fan has a heating mode, and when the ceiling recessed fan is in a heating mode, the included angle between the second air deflector and the vertical surface is in the range of -10° to 10°.

[0111] In some embodiments, the air outlet assembly includes an air outlet frame, wherein an air outlet is formed between the air outlet frame and the main body frame, and the air outlet frame is lifted independently.

[0112] In some embodiments, the air outlet assembly includes an air outlet frame and an air return panel, wherein an air outlet is formed between the air outlet frame and the main body frame, the air return panel is provided with an air return gate, and the air outlet frame and the air return panel are connected and lifted together.

[0113] In the ceiling recessed fan with a second air deflector provided by the present disclosure, a second air deflector is provided to deflect the airflow direction in the air outlet duct, so as to adjust the airflow direction entering the air outlet, which effectively reduces the obstruction effect produced by the internal structure of the ceiling recessed fan over the air output of the ceiling recessed fan, and allows a more smooth internal airflow of the ceiling recessed fan. At the same time, the second air deflector cooperates with the first air deflector to jointly increase the adjustment of the air output of the ceiling recessed fan and improve the air output effect of the ceiling recessed fan. Also, standards are provided for designers by limiting the angle b, so as to facilitate determining the parameters of the second air deflector, which allows that the air output effect of the ceiling recessed fan product achieves preset requirements.

[0114] According to a ninth embodiment of the present disclosure, a ceiling recessed fan is provided. The ceiling recessed fan includes: a main body frame 1a internally provided with an air outlet duct having a first end and a second end; and an air outlet assembly arranged in the main body frame in a way so as to be able to be raised and lowered, wherein the air outlet assembly descends so that an air outlet is formed between the air outlet assembly and the main body frame, and the air outlet communicates with the second end of the air outlet duct. The ratio of the circulation area S1 of the air outlet 10a to the minimum circulation area S2 of the air outlet duct 2a is in the range of 0.7≤S1 / S2≤1.27.

[0115] In some embodiments, the air outlet duct has a second end communicating with the air outlet and a first end remote from the air outlet, and a minimum circulation area of the air outlet duct is formed at the first end of the air outlet duct.

[0116] In some embodiments, the air outlet assembly includes a rotatable air deflector, and the air deflector and the main body frame form an air outlet.

[0117] In some embodiments, the ceiling recessed fan also includes a rotating mechanism arranged on the air outlet assembly, and the air deflector is arranged on the rotating mechanism.

[0118] In some embodiments, the rotating mechanism includes a rotary arm, one end of which is hinged to the air outlet assembly, and the other end of which is arranged on the air deflector.

[0119] In some embodiments, the rotating mechanism also includes a driving member arranged on the air outlet assembly and drivingly connected with the rotary arm.

[0120] In some embodiments, the air outlet assembly has a closed position to close the air outlet in cooperation with the main body frame, and the air deflector has a first edge and a second edge. When the air outlet assembly is in the closed position, the first edge is sealed with a corresponding position of the main body frame, and the second edge is sealed with a corresponding edge of the air outlet assembly.

[0121] In some embodiments, a sealing structure is provided between the second edge and the air outlet assembly.

[0122] In some embodiments, the ceiling recessed fan also includes a lifting mechanism arranged in the main body frame, and the air outlet assembly is arranged on the lifting mechanism.

[0123] In some embodiments, the air outlet assembly includes an air outlet frame, wherein an air outlet is formed between the air outlet frame and the main body frame, and the air outlet frame is lifted independently.

[0124] In some embodiments, the air outlet assembly includes an air outlet frame and an air return panel, wherein an air outlet is formed between the air outlet frame and the main body frame, the air return panel is provided with an air return gate, and the air outlet frame and the air return panel are connected and lifted together.

[0125] The ceiling recessed fan with an air outlet provided in the present disclosure limits the relationship between the height of the air outlet and the minimum circulation area of the air outlet duct to provide design standards for the ceiling recessed fan so as to balance the attenuation of the air supply distance and the air output volume of the ceiling recessed fan and improve the produced air output effect of the ceiling recessed fan, thereby reducing the design difficulties.

[0126] According to a tenth aspect of the present disclosure, a ceiling recessed fan is provided. The ceiling recessed fan includes: a main body frame internally provided with an air outlet duct having a first end and a second end provided along the airflow direction; an air outlet assembly disposed on the main body frame 1a in a way so as to be able to be raised and lowered, and the air outlet assembly has an operation position that descends to a predetermined height, wherein an air outlet is formed between the air outlet assembly and the main body frame, and the air outlet communicates with the second end of the air outlet duct. When the air outlet assembly is in an operation position, the angle b between the air outlet and the air outlet duct is in the angle range of 130°≤b≤150°.

[0127] In some embodiments, the air outlet assembly includes an air deflector and an air outlet frame, wherein the air outlet frame is arranged in the main body frame; the air deflector is swingably arranged on the air outlet frame; and when the air outlet assembly is in an operation position, the air deflector may adjust the height of the air outlet.

[0128] In some embodiments, the ceiling recessed fan has a cooling mode, and when the ceiling recessed fan is in a cooling mode, the angle c between the plane where the air deflector is located and the air output direction of the air outlet duct is in the angle range of 120°≤c≤140°.

[0129] In some embodiments, the ceiling recessed fan has a heating mode, and when the ceiling recessed fan is in a heating mode, the angle c between the plane where the air deflector is located and the air output direction of the air outlet duct is in the angle range of 180°≤c≤190°.

[0130] In some embodiments, the air outlet assembly has a closed position to close the air outlet in cooperation with the main body frame, and the air deflector has a first edge and a second edge. When the air outlet assembly is in the closed position, the first edge is sealed with a corresponding position of the main body frame, and the second edge is sealed with a corresponding edge of the air outlet frame.

[0131] In some embodiments, the air deflector has a first edge and a second edge. When the air outlet assembly is in the closed position, the first edge is sealed with a corresponding edge of the main body frame, and the second edge is sealed with a corresponding edge of the air outlet frame.

[0132] In some embodiments, the second edge is provided with a first step structure, and the air outlet assembly is provided with a second step structure fit with the step structure, so that the first step structure can be sealingly fit with the second step structure.

[0133] In some embodiments, the first step structure is provided with a seal, and when the first step structure is sealingly fit with the second step structure, the seal is arranged between the first step structure and the second step structure.

[0134] In some embodiments, the ceiling recessed fan also includes a swinging mechanism arranged on the air outlet assembly, and the air deflector is arranged on the swinging mechanism.

[0135] In some embodiments, the swinging mechanism includes a rotary arm, one end of which is hinged to the air outlet frame, and the other end of which is arranged on the air deflector.

[0136] In some embodiments, the swinging mechanism also includes a driving member arranged on the air outlet frame and directly or indirectly driving the rotary arm to rotate.

[0137] In some embodiments, the air outlet assembly includes an air outlet frame, wherein an air outlet is formed between the air outlet frame and the main body frame, and the air outlet frame is lifted independently.

[0138] In some embodiments, the air outlet assembly includes an air outlet frame and an air return panel, wherein an air outlet is formed between the air outlet frame and the main body frame, the air return panel is provided with an air return gate, and the air outlet frame and the air return panel are connected and lifted together.

[0139] The ceiling recessed fan provided by the present disclosure provides design standards for the specific parameters of the air outlet assembly and the air deflector (the dimensions, the swingable angle of the air deflector, etc.) based on the angle between the air output direction of the air outlet and the air output direction of the air outlet duct and the angle between the plane where the air deflector is located and the air outlet duct, which can optimize the deflecting effect of the airflow at the air outlet, thereby enhancing the air outlet effect of the ceiling recessed fan and overcoming the problem of a poor air output effect of the ceiling recessed fan due to the design of the air outlet assembly and the air deflector by the appearance structure of the ceiling recessed fan in the related art that has been found by the inventors, and allows that the air output effect of the finished ceiling recessed fan achieves preset requirements. Wherein, the included angle is required in a cooling mode and a heating mode respectively to further optimize the parameters of the air deflector and further optimize the air output effect of the ceiling recessed fan.

[0140] In order to solve the problem of a poor air output effect of the ceiling recessed fan that has been found by the inventors, a ceiling recessed fan defining a matching relationship between the air deflector and the air outlet duct to improve the air output effect is provided.

[0141] A ceiling recessed fan, includes: a main body frame internally provided with an air outlet duct, wherein the air outlet duct has a first end and a second end along an airflow direction; an air outlet assembly arranged in the main body frame in a way so as to be able to be raised and lowered, and having an operation position which descends to a predetermined height and forms an air outlet with the main body frame, wherein the air outlet communicates with a second end of the air outlet duct; when the air outlet assembly is in the operation position, the angle b between the air output direction of the air outlet and the air output direction of the air outlet duct is in the angle value of 130°≤b≤150°.

[0142] The air outlet assembly includes an air deflector and an air outlet frame, wherein the air outlet frame is arranged in the main body frame; the air deflector is swingably arranged on the air outlet frame; and when the air outlet assembly is in an operation position, the air deflector may adjust the height of the air outlet.

[0143] The ceiling recessed fan has a cooling mode, and when the ceiling recessed fan is in a cooling mode, the angle c between the plane where the air deflector is located and the air output direction of the air outlet duct is in the angle range of 120°≤c≤140°.

[0144] The ceiling recessed fan has a heating mode, and when the ceiling recessed fan is in a heating mode, the angle c between the plane where the air deflector is located and the air output direction of the air outlet duct is in the angle range of 180°≤c≤190°.

[0145] The air outlet assembly has a closed position to close the air outlet in cooperation with the main body frame, and the air deflector has a first edge and a second edge. When the air outlet assembly is in the closed position, the first edge is sealed with a corresponding position of the main body frame, and the second edge is sealed with a corresponding edge of the air outlet frame.

[0146] The air deflector has a first edge and a second edge. When the air outlet assembly is in the closed position, the first edge is sealed with a corresponding edge of the main body frame, and the second edge is sealed with a corresponding edge of the air outlet frame.

[0147] The second edge is provided with a first step structure, and the air outlet assembly is provided with a second step structure fit with the step structure, so that the first step structure can be sealingly fit with the second step structure.

[0148] The first step structure is provided with a seal, and when the first step structure is sealingly fit with the second step structure, the seal is arranged between the first step structure and the second step structure.

[0149] The ceiling recessed fan also includes a swinging mechanism arranged on the air outlet assembly, and the air deflector is arranged on the swinging mechanism.

[0150] The swinging mechanism includes a rotary arm, one end of which is hinged to the air outlet frame, and the other end of which is arranged on the air deflector.

[0151] The swinging mechanism also includes a driving member arranged on the air outlet frame and directly or indirectly driving the rotary arm to rotate.

[0152] The air outlet assembly includes an air outlet frame, wherein an air outlet is formed between the air outlet frame and the main body frame, and the air outlet frame is lifted independently.

[0153] The air outlet assembly includes an air outlet frame and an air return panel, wherein an air outlet is formed between the air outlet frame and the main body frame, the air return panel is provided with an air return gate, and the air outlet frame and the air return panel are connected and lifted together.

[0154] The air outlet assembly is provided with at least one second air outlet communicating with the air outlet duct.

[0155] The ceiling recessed fan further includes an air deflector which is rotatably arranged at the second air outlet and capable of closing or opening the second air outlet.

[0156] The ceiling recessed fan provided by the present disclosure provides design standards for the specific parameters of the air outlet assembly and the air deflector (the dimensions, the swingable angle of the air deflector, etc.) based on the angle between the air output direction of the air outlet and the air output direction of the air outlet duct and the angle between the plane where the air deflector is located and the air outlet duct, which can optimize the deflecting effect of the airflow at the air outlet, thereby enhancing the air outlet effect of the ceiling recessed fan and overcoming the problem of a poor air output effect of the ceiling recessed fan due to the design of the air outlet assembly and the air deflector by the appearance structure of the ceiling recessed fan in the related art that has been found by the inventors, and allows that the air output effect of the finished ceiling recessed fan achieves preset requirements. Wherein, the included angle is required in a cooling mode and a heating mode respectively to further optimize the parameters of the air deflector and further optimize the air output effect of the ceiling recessed fan.

[0157] In order to improve the air output effect of the ceiling recessed fan, a ceiling recessed fan defining a relationship between the dimensions of the air outlet of the ceiling recessed fan and the air output volume of the ceiling recessed fan to improve the air output volume is provided.

[0158] Therefore, the present disclosure provides a ceiling recessed fan. The ceiling recessed fan includes: a main body frame; and an air outlet assembly arranged in the main body frame in a way so as to be able to be raised and lowered. Moreover, the air outlet assembly has an operation position descending to a set height and forming an air outlet with the main body frame. The height h1 of the air outlet is in the range of 20mm≤h1≤36mm.

[0159] When the height h1 of the air outlet is in the range of 20mm≤h1≤36mm, the air output volume of the ceiling recessed fan is greater than or equal to 75% of a rated air output volume of the ceiling recessed fan.

[0160] The air outlet assembly includes a rotatable air deflector, and the air deflector and the main body frame form an air outlet.

[0161] When the ceiling recessed fan is in a cooling mode, the angle range of the included angle a between the plane where the air deflector is located and the horizontal plane is -10°≤a≤10°, and when a=0°, the plane where the air deflector is located is parallel to the horizontal plane.

[0162] The ceiling recessed fan also includes a rotating mechanism arranged on the air outlet assembly, and the air deflector is arranged on the rotating mechanism.

[0163] The rotating mechanism includes a rotary arm, one end of which is hinged to the air outlet assembly, and the other end of which is arranged on the air deflector.

[0164] The rotating mechanism also includes a driving member arranged on the air outlet assembly and drivingly connected with the rotary arm.

[0165] The air outlet assembly includes an air outlet frame, the air deflector is rotatably arranged on the air outlet frame, and a step sealing structure is provided between an edge of the air deflector and the air outlet frame.

[0166] The edge of the air deflector is provided with a first step structure, and the air outlet frame is provided with a second step structure, so that the first step structure and the second step structure are fit to form the step sealing structure.

[0167] A sealing member is provided between the first step structure and the second step structure.

[0168] The air outlet assembly includes an air outlet frame, wherein an air outlet is formed between the air outlet frame and the main body frame, and the air outlet frame is lifted independently.

[0169] The air outlet assembly includes an air outlet frame and an air return panel, wherein an air outlet is formed between the air outlet frame and the main body frame, the air return panel is provided with an air return gate, and the air outlet frame and the air return panel are connected and lifted together.

[0170] The ceiling recessed fan provided in the present disclosure limits the relationship between the height of the air outlet and the target air output volume to provide design standards for the ceiling recessed fan so as to balance the attenuation of the air supply distance and the air output volume of the ceiling recessed fan and improve the produced air output effect of the ceiling recessed fan; furthermore because the relationship between the height of the air outlet and the target air velocity of the air output is limited, selection standards of the fan are provided for the ceiling recessed fan, so as to reduce the design difficulties without wasting the air volume due to the selection of a fan that is too large, which effectively reduces the energy consumption of the ceiling recessed fan. Because the air deflector can adjust the height of the air outlet, by limiting the relationship between the angle a and the height of the air outlet so as to limit the rotational angle of the air deflector, in the end, the produced air output effect of the ceiling recessed fan reaches a preset level.

[0171] In order to improve the air output effect of the ceiling recessed fan, a ceiling recessed fan defining a cooperation relationship between the air deflector and the mounting planar face of the ceiling recessed fan to improve the air output volume is provided.

[0172] A ceiling recessed fan, includes: a main body frame; an air outlet assembly arranged in the main body frame, wherein when the ceiling recessed fan is in a cooling mode, a height difference is formed between the air outlet assembly and the main body frame, and an air outlet is formed between the air outlet assembly and the main body frame; a first air deflector arranged at a swinging mechanism, and swingably arranged at the air outlet; the angle c between the plane where the first air deflector is located and a mounting planar face of the main body frame is in the range of -10°≤c≤10°, and when the angle c is 0°, the plane where the first air deflector is located is parallel to the mounting planar face; the air outlet assembly has a first descending height h, and the first descending height h is in the range of 20mm≤h≤36mm when the ceiling recessed fan is in a cooling mode.

[0173] When the angle c is in the range of -10°≤c<0°, the plane of the first air deflector tilts upward relative to the mounting planar face, and the first descending height h is in the range of 20mm≤h≤28mm. Alternatively, when the angle c is in the range of 0°≤c<10°, the first descending height h is in the range of 20mm≤h≤36mm.

[0174] The air outlet assembly is arranged in the main body frame in a way so as to be able to be raised and lowered, and the air outlet assembly has an operation position descending to a set height to form a height difference.

[0175] The mounting planar face of the main body frame is parallel to the horizontal plane.

[0176] The first air deflector is provided with an extension plate projecting out of the first air deflector when the air outlet assembly is in the operation position.

[0177] The ceiling recessed fan also includes an air deflection structure arranged in the main body frame, and capable of deflecting the air output of the air outlet when the ceiling recessed fan is in a cooling mode.

[0178] The main body frame includes a side frame, at least part of the air output of the air outlet passes through the side frame, and the air deflecting structure includes a second air deflector swingably arranged on the side frame; or the main body frame includes a side frame, at least part of the air output of the air outlet passes through the side frame, and the side frame is formed with an air deflecting channel which constitutes the air deflecting structure.

[0179] In another aspect of the present disclosure, a ceiling recessed fan is provided. The ceiling recessed fan includes: a main body frame; an air outlet assembly arranged in the main body frame, wherein when the ceiling recessed fan is in a cooling mode, a height difference is formed between the air outlet assembly and the main body frame, and an air outlet is formed between the air outlet assembly and the main body frame; a first air deflector arranged at a swinging mechanism, and swingably arranged at the air outlet; the plane where the first air deflector is located tilts upward relative to a mounting planar face of the main body frame, and the angle c between the plane where the first air deflector is located and the mounting planar face is in the range of -10°≤c≤0°.

[0180] The air outlet assembly is arranged in the main body frame in a way so as to be able to be raised and lowered, and the air outlet assembly has an operation position descending to a set height to form a height difference.

[0181] The air outlet assembly has a first descending height h, and the first descending height h is in the range of 20mm≤h≤28mm when the ceiling recessed fan is in a cooling mode.

[0182] In the ceiling recessed fan provided by the present disclosure, the air output of the ceiling recessed fan is deflected by the first air deflector, and by limiting the angle relationship between the plane where the first air deflector is located and the mounting planar face of the main body frame, the first air deflector tilts towards the mounting planar face of the main body frame, so as to allow that the air output of the ceiling recessed fan faces towards the mounting planar face of the main body frame as much as possible, thereby improving the air output effect of the ceiling recessed fan. At the same time, according to the relationship between the air output volume of the ceiling recessed fan and the angle c or the relationship between the height of the air outlet assembly and the angle c, the air output effect of the ceiling recessed fan is further improved according to actual requirements of the ceiling recessed fan.

[0183] In order to improve the air output effect of the ceiling recessed fan, a ceiling recessed fan with a cooling mode defining a relationship between a descending height of the air outlet frame and the air outlet duct in a cooling mode to improve the air output volume is provided.

[0184] A ceiling recessed fan with a cooling mode, includes: a main body frame internally provided with an air outlet duct, wherein the air outlet duct has a first end and a second end along an airflow direction; an air outlet assembly arranged in the main body frame, wherein when the ceiling recessed fan is in a cooling mode, there is a height difference between the air outlet assembly and the main body frame, and an air outlet is formed between the air outlet assembly and the main body frame, and the air outlet communicates with a second end of the air outlet duct; the ratio of the height h1 of the air outlet to the width h2 of a first end of the air outlet duct is in the range of 1 / 3≤h1 / h2≤3 / 5.

[0185] The air outlet assembly is arranged in the main body frame in a way so as to be able to be raised and lowered, and the air outlet assembly has an operation position descending to a set height to form a height difference. When the air outlet assembly is in an operation position, the ratio range of the height h1 of the air outlet to the width h2 of the first end of the air outlet duct is 1 / 3≤h1 / h2≤3 / 5.

[0186] The air outlet assembly includes an air deflector and an air outlet frame, wherein the air outlet frame is arranged in the main body frame; the air deflector is rotatably arranged on the air outlet frame; and when the air outlet assembly is in an operation position, the air deflector may adjust the height of the air outlet.

[0187] The air deflector has a first position to allow the height h1 of the air outlet to reach a minimum value, and the ratio of the minimum height h1 of the air outlet to the width of a first end of the air outlet duct is in the range of 1 / 3≤h1 / h2≤3 / 5.

[0188] When the ceiling recessed fan is in a cooling mode, the angle range of the included angle a between the plane where the air deflector is located and the horizontal plane is -10°≤a≤10°, and when a=0°, the plane where the air deflector is located is parallel to the horizontal plane.

[0189] When the ceiling recessed fan is in a cooling mode, the included angle a in the angle range of 10°≥a > 0°, and when a > 0°, the air deflector tilts upwards relative to the horizontal plane.

[0190] The air outlet assembly has a closed position to close the air outlet in cooperation with the main body frame, and the air deflector has a first edge and a second edge. When the air outlet assembly is in the closed position, the first edge is sealed with a corresponding position of the main body frame, and the second edge is sealed with a corresponding edge of the air outlet frame.

[0191] When the air outlet assembly is in the closed position, the air outlet frame and the air deflector jointly cooperate with the main body frame to form a seal.

[0192] The second edge is provided with a first step structure, and the air outlet frame is provided with a second step structure fit with the first step structure. When the air outlet assembly is in the closed position, the first step structure is sealingly fit with the second step structure.

[0193] The first step structure is provided with a seal, and when the air outlet assembly is in the closed position, the seal is arranged between the first step structure and the second step structure.

[0194] The ceiling recessed fan also includes a lifting mechanism arranged in the main body frame, and the air outlet assembly is arranged on the lifting mechanism.

[0195] The air outlet assembly includes an air outlet frame, wherein an air outlet is formed between the air outlet frame and the main body frame, and the air outlet frame is lifted independently.

[0196] The air outlet assembly includes an air outlet frame and an air return panel, wherein an air outlet is formed between the air outlet frame and the main body frame, the air return panel is provided with an air return gate, and the air outlet frame and the air return panel are connected and lifted together.

[0197] The air outlet assembly is provided with at least one second air outlet communicating with a second end of the air outlet duct.

[0198] The ceiling recessed fan further includes an air deflector which is rotatably arranged at the second air outlet and capable of closing or opening the second air outlet.

[0199] The ceiling recessed fan with a cooling mode provided in the present disclosure, when in a cooling mode, limits the ratio of the height of an air outlet to the width of the first end of the air outlet duct; that is, design standards are provided for the ceiling recessed fan so as to balance the attenuation of the air supply distance and the air output volume of the ceiling recessed fan, such that the produced air output effect of the ceiling recessed fan satisfies requirements when in a cooling mode; furthermore, because an air deflector can adjust the height of the air outlet, by limiting the ratio range of a minimum value of the height of the air outlet to the width of the first end of the air outlet duct so as to limit the rotational angle of the air deflector, in the end, the produced air output effect of the ceiling recessed fan reaches a preset level.

[0200] In order to improve the air output effect of the ceiling recessed fan, a ceiling recessed fan with an air outlet defining the dimensions of the air outlet of the ceiling recessed fan to improve the air output volume is provided.

[0201] Therefore, the present disclosure provides a ceiling recessed fan, including: a main body frame internally provided with an air outlet duct, wherein the air outlet duct has a first end and a second end; an air outlet assembly arranged in the main body frame in a way so as to be able to be raised and lowered, and descending to form an air outlet with the main body frame, wherein the air outlet communicates with a second end of the air outlet duct; the ratio of the circulation area S1 of the air outlet to the minimum circulation area S2 of the air outlet duct is in the range of 0.7≤S1 / S2≤1.27.

[0202] The air outlet duct has a second end communicating with the air outlet and a first end remote from the air outlet, and a minimum circulation area of the air outlet duct is formed at the first end of the air outlet duct.

[0203] The air outlet assembly includes a rotatable air deflector, and the air deflector and the main body frame form an air outlet.

[0204] The ceiling recessed fan also includes a rotating mechanism arranged on the air outlet assembly, and the air deflector is arranged on the rotating mechanism.

[0205] The rotating mechanism includes a rotary arm, one end of which is hinged to the air outlet assembly, and the other end of which is arranged on the air deflector.

[0206] The rotating mechanism also includes a driving member arranged on the air outlet assembly and drivingly connected with the rotary arm.

[0207] The air outlet assembly has a closed position to close the air outlet in cooperation with the main body frame, and the air deflector has a first edge and a second edge. When the air outlet assembly is in the closed position, the first edge is sealed with a corresponding position of the main body frame, and the second edge is sealed with a corresponding edge of the air outlet assembly.

[0208] A sealing structure is provided between the second edge and the air outlet assembly.

[0209] The ceiling recessed fan also includes a lifting mechanism arranged in the main body frame, and the air outlet assembly is arranged on the lifting mechanism.

[0210] The air outlet assembly includes an air outlet frame, wherein an air outlet is formed between the air outlet frame and the main body frame, and the air outlet frame is lifted independently.

[0211] The air outlet assembly includes an air outlet frame and an air return panel, wherein an air outlet is formed between the air outlet frame and the main body frame, the air return panel is provided with an air return gate, and the air outlet frame and the air return panel are connected and lifted together.

[0212] The air outlet assembly is provided with at least one second air outlet communicating with a second end of the air outlet duct.

[0213] The ceiling recessed fan further includes an air deflector which is rotatably arranged at the second air outlet and capable of closing or opening the second air outlet.

[0214] The ceiling recessed fan with an air outlet provided in the present disclosure limits the relationship between the height of the air outlet and the minimum circulation area of the air outlet duct to provide design standards for the ceiling recessed fan so as to balance the attenuation of the air supply distance and the air output volume of the ceiling recessed fan and improve the produced air output effect of the ceiling recessed fan, thereby reducing the design difficulties.

[0215] The embodiment of the present disclosure provides a control method and control apparatus of a ceiling recessed fan and a ceiling recessed fan to solve the problem in the art that when the ceiling recessed fan is just turned on, since cold air cannot be directly blown to the skin, it is impossible to rapidly relieve the discomfort in hot air that has been found by the inventors.

[0216] Therefore, the present disclosure provides a control method of a ceiling recessed fan, wherein the ceiling recessed fan includes a main body frame and an air outlet assembly, the air outlet assembly is mounted on the main body frame, and a height difference is formed between the air outlet assembly and the main body frame to form a first air outlet; the air outlet assembly is also provided with a second air outlet, the control method including the steps of: judging whether a fast cooling condition is met; and controlling the first air outlet and the second air outlet to be opened at the same time when the judgment result is YES.

[0217] In some embodiments, the ceiling recessed fan further includes: a lifting mechanism through which the air outlet assembly is mounted on the main body frame; the step of controlling the opening of the first air outlet includes: controlling the lifting mechanism to drive the air outlet assembly to descend so as to open the first air outlet.

[0218] In some embodiments, a first air deflecting portion is provided between the air outlet assembly and the main body frame; the air outlet assembly is provided with a second air deflecting portion, the opening of the first air outlet is controlled by controlling the opening of the first air deflecting portion; the opening of the second air outlet is controlled by controlling the opening of the second air deflecting portion.

[0219] In some embodiments, the step of judging whether a fast cooling condition is met includes: judging whether a fast cooling instruction is received or whether an indoor temperature is higher than a first preset temperature; judging that a fast cooling condition is satisfied if YES.

[0220] In some embodiments, after the step of controlling the first air outlet and the second air outlet to be opened at the same time, the control method further includes: judging whether a fast cooling exit condition is met; controlling the second air outlet to be closed when the first air outlet remains opened if YES.

[0221] In some embodiments, the step of judging whether a fast cooling exit condition is met includes: judging whether a fast cooling exit instruction is received, or judging whether an opening duration of the second air outlet reaches a first preset duration, or judging whether an indoor temperature is lower than a second preset temperature; judging that a fast cooling exit condition is met if YES.

[0222] In some embodiments, after the step of judging that a fast cooling exit condition is met and before controlling the second air outlet to be closed, the control method further includes: controlling the second air outlet to be intermittently opened; controlling the second air outlet to be closed after a second preset duration.

[0223] The present disclosure further provides a control apparatus of a ceiling recessed fan, for realizing the above-described control method, wherein the control apparatus includes: a first judging module configured to judge whether a fast cooling condition is met; a first control module configured to control a first air outlet and a second air outlet to be opened at the same time when the judgment result is YES.

[0224] The present disclosure also provides a ceiling recessed fan, including a main body frame and an air outlet assembly, wherein the air outlet assembly is mounted on the main body frame, and a height difference is formed between the air outlet assembly and the main body frame to form a first air outlet which outputs air horizontally; the air outlet assembly is also provided with a second air outlet which outputs air downwards, and the ceiling recessed fan further includes the above-described control apparatus.

[0225] The present embodiment also provides a computer readable storage medium having a computer program stored thereon that, when executed by a processor implements the above-described control method.

[0226] By applying the technical solution of the present disclosure, when a fast cooling condition is met, the first air outlet is opened to perform horizontal air output, and the second air outlet is opened to perform downward air output, so that cold air is directly blown to the user, which can reduce the skin-felt temperature of the user as soon as possible and relieve the discomfort of the user in hot air as soon as possible, thereby improving the user experience.

[0227] The embodiment of the present disclosure provides a ceiling recessed fan to solve the problem in the art that the lifting mechanism of the ceiling recessed fan is likely to be damaged that has been found by the inventors.

[0228] According to a first aspect of the present disclosure, a ceiling recessed fan is provided. The ceiling recessed fan includes a main body frame, an air outlet assembly and a lifting mechanism, wherein the air outlet assembly is connected to the main body frame through the lifting mechanism, the main body frame is provided with a load-bearing member, and the air outlet assembly is provided with a lapped joint member movable relative to the load-bearing member. During the ascending process of the air outlet assembly, the load-bearing member is separated from a lapped joint member. When the air outlet assembly descends to an operation position, the lapped joint member is in lapped joint with the load-bearing member, and the load-bearing member bears at least part of the gravity of the air outlet assembly.

[0229] In some embodiments, a movement stroke A of the lapped joint member is equal to a maximum descending height of the air outlet assembly.

[0230] In some embodiments, the maximum lifting distance of the lifting mechanism is greater than the movement stroke of the lapped joint member.

[0231] In some embodiments, the lifting mechanism includes: a driving device arranged in the main body frame; a gear mounted on an output shaft of the driving device; a rack fixedly connected with the air outlet assembly and meshed with the gear, wherein the driving device drives the air outlet assembly to ascend and descend by cooperation between the gear and the rack; a meshing length of the rack is equal to a maximum lifting distance of the lifting mechanism.

[0232] In some embodiments, the lifting mechanism is mounted on the load-bearing member.

[0233] In some embodiments, the load-bearing member includes a load-bearing plate and a load-bearing step, wherein the load-bearing plate is connected with the main body frame, and the load-bearing step is connected with the load-bearing plate; the lapped joint member includes a lapped joint plate and a lapped joint step, wherein the lapped joint plate is connected with the air outlet assembly, and the lapped joint step is connected with the lapped joint plate; during the ascending process of the air outlet assembly, the lap jointed step ascends away from the load-bearing step; when the air outlet assembly descends to an operation position, the lap jointed step descends and is in lapped joint with the load-bearing step.

[0234] In some embodiments, the bearing plate has a first side surface and a second side surface that are oppositely arranged; the load-bearing step is formed on the first side surface, and the lifting mechanism is mounted on the second side surface.

[0235] In some embodiments, the cross-sectional shape of the load-bearing member is C-shaped, and the cross-sectional shape of the lapped joint member is L-shaped or T-shaped.

[0236] In some embodiments, the air outlet assembly includes an air outlet frame, wherein an air outlet is formed between the air outlet frame and the main body frame, and the air outlet frame is lifted independently.

[0237] In some embodiments, the air outlet assembly includes an air outlet frame and an air return panel, wherein an air outlet is formed between the air outlet frame and the main body frame, the air return panel is provided with an air return gate, and the air outlet frame and the air return panel are connected and lifted together.

[0238] In some embodiments, the air outlet assembly descends so that a first air outlet is formed between the air outlet assembly and the main body frame.

[0239] In some embodiments, the air outlet assembly descends to form an air supply duct with the main body frame, so that one end of the air supply duct forms a first air outlet, and the other end of the air supply duct communicates with an air outlet duct of the ceiling recessed fan.

[0240] In some embodiments, the air outlet assembly is also provided with a second air outlet communicating with the air outlet duct of the ceiling recessed fan.

[0241] In some embodiments, the air outlet assembly is provided with an air deflector located at the position of the first air outlet and / or the second air outlet.

[0242] In some embodiments, the main body frame further includes a side frame, and when the air outlet assembly descends so that a first air outlet is formed between the air outlet assembly and the main body frame, an air supply duct is formed between the air outlet assembly and the side frame. The projection of the air outlet assembly at least partially coincides with the projection of the side frame on the mounting planar face of the main body frame.

[0243] In some embodiments, the ceiling recessed fan has a first air output mode, a second air output mode and a third air output mode: When the ceiling recessed fan is in the first air output mode, the first air outlet is open, and the second air outlet is closed; When the ceiling recessed fan is in the second air output mode, the first air outlet is open, and some or all the second air outlets are open; When the ceiling recessed fan is in the third air output mode, the first air outlet is closed, and some or all the second air outlets are open.

[0244] In some embodiments, when the ceiling recessed fan is in a cooling mode, the ceiling recessed fan is in the first air output mode or the second air output mode; and when the ceiling recessed fan is in a heating mode, the ceiling recessed fan is in the third air output mode or the second air output mode.

[0245] The ceiling recessed fan with a load-bearing member in the present disclosure is provided with the load-bearing member and the lapped joint member, which cooperate to transfer the gravity of the air outlet assembly to the main body frame when the air outlet assembly descends to an operation position, and at least part of the gravity of the air outlet assembly is directly transferred to the main body frame through the load-bearing member and the lapped joint member, instead of being totally borne by the lifting mechanism. This greatly reduces the pressure borne by the lifting mechanism during the operation process and reduces the deformation and stress concentration of the lifting mechanism under the effect of pressure, which solves the problem that the lifting mechanism is likely to be damaged during use for a long time that has been found by the inventors.

[0246] According to a second embodiment of the present disclosure, a ceiling recessed fan is provided to solve the problem that the air output of the ceiling recessed fan enters the air return gate through the movement gap between the air outlet assembly and the main body frame so that it is likely to cause condensation that has been found by the inventors.

[0247] The present disclosure provides a ceiling recessed fan, including a main body frame, an air outlet assembly and a lifting mechanism. The main body frame is internally formed with an air outlet duct, and the air outlet assembly is connected to the main body frame through a lifting mechanism. The air outlet assembly descends so that a first air outlet is formed between the air outlet assembly and the main body frame. The ceiling recessed fan further includes: a flexible windshield located between the air outlet duct and the air return gate, so that a first end of the flexible windshield is connected with the air outlet assembly; and a second end of the flexible windshield is connected with the main body frame. When the air outlet assembly descends to an operation position, the flexible windshield is unfolded to block the air return gate and the first air outlet of the ceiling recessed fan.

[0248] In some embodiments, the main body frame has a first thermal insulation portion located between the air outlet duct and the air return gate, and the first end of the flexible windshield is connected to the first thermal insulation portion.

[0249] In some embodiments, the first thermal insulation portion has a first side surface and a second side surface that are oppositely arranged, wherein the first side surface faces towards the first air outlet and the second side surface faces towards the return air outlet. The first side surface is laid with a thermal insulation material, and the second side surface is mounted with a lifting mechanism.

[0250] In some embodiments, the air outlet assembly has a second thermal insulation portion located between the air outlet duct and the air return gate, and the second end of the flexible windshield is connected to the second thermal insulation portion.

[0251] In some embodiments, when the air outlet assembly descends to an operation position, the first thermal insulation portion and the second thermal insulation portion cooperate to form a thermal insulation layer for performing thermal insulation on the airflow between the air return gate and the first air outlet.

[0252] In some embodiments, the material of the flexible windshield includes one or more of the following: corrugated board, waterproof cloth and windproof fabric.

[0253] In some embodiments, when the air outlet assembly descends to an operation position, the windward surface of the flexible windshield forms an air deflecting surface for guiding the air output to the first air outlet.

[0254] In some embodiments, the ceiling recessed fan further includes an elastic reel arranged in the main body frame, so that one end of the flexible windshield is connected with the elastic reel. The elastic reel is configured to wind up the flexible windshield when the air outlet assembly ascends.

[0255] In some embodiments, the air outlet assembly includes an air outlet frame, wherein a first air outlet is formed between the air outlet frame and the main body frame, and the air outlet frame is lifted independently.

[0256] In some embodiments, the air outlet assembly includes an air outlet frame and an air return panel, wherein a first air outlet is formed between the air outlet frame and the main body frame, the air return panel is provided with an air return gate, and the air outlet frame and the air return panel are connected and lifted together.

[0257] In some embodiments, the air outlet assembly is provided with at least one second air outlet communicating with the air outlet duct; when the air outlet assembly descends to an operation position, the flexible windshield is unfolded to block the flow of the airflow between the air return gate and the first air outlet and between the air return gate and the second air outlet.

[0258] In some embodiments, when the air outlet assembly descends so that a first air outlet is formed between the air outlet assembly and the main body frame, a gap which is formed between the air outlet assembly and the main body frame, forms an air supply duct. One end of the air supply duct communicates with the air outlet duct, and the other end of the air supply duct forms a first air outlet.

[0259] In some embodiments, the main body frame further includes a side frame, and when the air outlet assembly descends so that a first air outlet is formed between the air outlet assembly and the main body frame, an air supply duct is formed between the air outlet assembly and the side frame. The projection of the air outlet assembly at least partially coincides with the projection of the side frame on the mounting planar face of the main body frame.

[0260] In some embodiments, the ceiling recessed fan has a first air output mode, a second air output mode and a third air output mode: when the ceiling recessed fan is in the first air output mode, the first air outlet is open, and the second air outlet is closed; when the ceiling recessed fan is in the second air output mode, the first air outlet is open, and some or all the second air outlets are open; when the ceiling recessed fan is in the third air output mode, the first air outlet is closed, and some or all the second air outlets are open.

[0261] In some embodiments, when the ceiling recessed fan is in a cooling mode, the ceiling recessed fan is in the first air output mode or the second air output mode; and when the ceiling recessed fan is in a heating mode, the ceiling recessed fan is in the third air output mode or the second air output mode.

[0262] In the ceiling recessed fan provided by some embodiments of the present disclosure, both ends of the flexible windshield are connected to the main body frame and the air outlet assembly respectively, and when the air outlet assembly first descends to an operation position, the flexible windshield is unfolded to block the air return gate and the first air outlet of the ceiling recessed fan so as to partition the airflow between the air outlet and the first air outlet, thereby preventing the air output from entering the air outlet from the movement gap and reducing the generation of condensation.

[0263] According to a third embodiment of the present disclosure, a ceiling recessed fan is provided to solve the problem in the art that there are many irregular structures inside the air duct of the ceiling recessed fan so that it is likely to cause energy loss of the air output that has been found by the inventors.

[0264] The present disclosure provides a ceiling recessed fan, which includes a main body frame, an air outlet assembly and a lifting mechanism, wherein the main body frame is internally formed with an air outlet duct. The air outlet assembly is connected to the main body frame through a lifting mechanism, and the air outlet assembly descends so that a first air outlet is formed between the air outlet assembly and the main body frame. The main body frame has a first windshield located between the air outlet duct and the air return gate, and the air outlet assembly has a second windshield located between the air outlet duct and the air return gate. When the air outlet assembly descends to an operation position, the first windshield cooperates with the second windshield to block the air return gate and the first air outlet. The ceiling recessed fan further includes: an air deflector located in the air outlet duct. The first end of the air deflector is swingably arranged in the main body frame. When the air outlet assembly descends to an operation position, the second end of the air deflector is in lapped joint with the second windshield. The air deflector covers at least part of the surface structure of the first windshield and at least part of the surface structure of the second windshield, and the air deflector is configured to deflect the air output to the first air outlet.

[0265] In some embodiments, the air outlet assembly ascends and descends to swing the air deflector. During the descending process of the air outlet assembly, and the second end of the air deflector descends by gravity and is in lapped joint with the air outlet assembly. During the ascending process of the air outlet assembly, the air outlet assembly pushes the air deflector to ascend.

[0266] In some embodiments, the second windshield is provided with a first air deflecting surface arranged on one side of the second windshield facing towards the first air outlet, and the second end of the air deflecting plate may be in lapped joint with the first air deflecting surface.

[0267] In some embodiments, the windward surface of the air deflector forms a second air deflecting surface. When the air outlet assembly descends to an operation position, the second air deflecting surface is connected with the first air deflecting surface to form an air deflecting structure.

[0268] In some embodiments, when the air outlet assembly ascends to a retracted position, the air deflector is located in an avoidance position, and the air deflector swings upward to avoid the retracted air outlet assembly.

[0269] In some embodiments, the first windshield and / or the second windshield are / is provided with a thermal insulation layer.

[0270] In some embodiments, the air outlet assembly includes an air outlet frame, wherein a first air outlet is formed between the air outlet frame and the main body frame, and the air outlet frame is lifted independently.

[0271] In some embodiments, the air outlet assembly includes an air outlet frame and an air return panel, wherein a first air outlet is formed between the air outlet frame and the main body frame, the air return panel is provided with an air return gate, and the air outlet frame and the air return panel are connected and lifted together.

[0272] In some embodiments, the air outlet assembly is provided with at least one second air outlet communicating with the air outlet duct; when the air outlet assembly descends to an operation position, the first windshield cooperates with the second windshield to block the flow of the airflow between the air return gate and the first air outlet and between the air return gate and the second air outlet; when the air outlet assembly descends to an operation position, the air deflector is configured to deflect the air output to the first air outlet and / or the second air output.

[0273] In some embodiments, when the air outlet assembly descends so that a first air outlet is formed between the air outlet assembly and the main body frame, a gap which is formed between the air outlet assembly and the main body frame, forms an air supply duct. One end of the air supply duct communicates with the air outlet duct, and the other end of the air supply duct forms a first air outlet.

[0274] In some embodiments, the main body frame further includes a side frame, and when the air outlet assembly descends so that a first air outlet is formed between the air outlet assembly and the main body frame, an air supply duct is formed between the air outlet assembly and the side frame. The projection of the air outlet assembly at least partially coincides with the projection of the side frame on the mounting planar face of the main body frame.

[0275] In some embodiments, the ceiling recessed fan has a first air output mode, a second air output mode and a third air output mode: when the ceiling recessed fan is in the first air output mode, the first air outlet is open, and the second air outlet is closed; when the ceiling recessed fan is in the second air output mode, the first air outlet is open, and some or all the second air outlets are open; when the ceiling recessed fan is in the third air output mode, the first air outlet is closed, and some or all the second air outlets are open.

[0276] In some embodiments, when the ceiling recessed fan is in a cooling mode, the ceiling recessed fan is in the first air output mode or the second air output mode; when the ceiling recessed fan is in a heating mode, the ceiling recessed fan is in the third air output mode or the second air output mode.

[0277] In the ceiling recessed fan provided by some embodiments of the present disclosure, one end of the air deflector is swingably arranged in the main body frame. When the air outlet assembly first descends to an operation position, the air deflector swings so that the other end of the air deflector is in lapped joint with the second windshield by swinging, and covers at least part of the surface structure of the first windshield and at least part of the surface structure of the second windshield. That is, the irregular structure inside the air duct is blocked by the air deflector, which not only prevents the outlet air from flowing through the irregular structure to reduce the generation of turbulence, but also deflects the air output in the air duct to the air outlet through the air deflector, thereby allowing a higher air output efficiency and reducing the air volume loss.

[0278] According to a fourth embodiment of the present disclosure, a ceiling recessed fan is provided to solve the problem that the air output of the ceiling recessed fan enters the air return gate through the movement gap between the air outlet assembly and the main body frame so that it is likely to cause condensation that has been found by the inventors.

[0279] The present disclosure discloses a ceiling recessed fan, including a main body frame, an air outlet assembly and a lifting mechanism. The main body frame is internally formed with an air outlet duct, and the air outlet assembly is connected to the main body frame through a lifting mechanism. The air outlet assembly descends so that a first air outlet is formed between the air outlet assembly and the main body frame. The ceiling recessed fan further includes: a first windshield arranged in the main body frame and located between the air outlet duct and the air return gate, wherein the first windshield has an accommodating groove; a second windshield arranged on the air outlet assembly and located between the air outlet duct and the air return gate. The first end of the second windshield is connected with the air outlet assembly, the second end of the second windshield is movably arranged in the accommodating groove. When the air outlet assembly descends to an operation position, the first windshield cooperates with the second windshield to block the flow of the airflow between the air return gate and the first air outlet.

[0280] In some embodiments, the notch of the accommodating groove is arranged towards the descending direction of the air outlet assembly, and the second windshield passes through the notch.

[0281] In some embodiments, a sealing structure is provided between the notch and the second windshield.

[0282] In some embodiments, the sealing structure is a sealing brush.

[0283] In some embodiments, the first windshield cooperates with the second windshield to form a maze sealing structure.

[0284] In some embodiments, the second end of the second windshield has a step structure, so that the step structure, the notch and the inner wall of the accommodating groove together form a maze sealing structure.

[0285] In some embodiments, the groove wall of the accommodating groove is provided with a sealing protrusion. When the air outlet assembly descends to an operation position, the sealing protrusion abuts against or is lapped joint with the step structure to form cooperation, so as to block the air return gate and the first air outlet.

[0286] In some embodiments, the ceiling recessed fan has an air outlet duct, and the first windshield has a first side surface located in the air outlet duct, wherein the first side surface is an air deflecting surface for deflecting the air output to the first air outlet.

[0287] In some embodiments, the ceiling recessed fan also has an air return duct, the first windshield also has a second side surface located in the air return duct, and the lifting mechanism is mounted on the second side surface.

[0288] In some embodiments, the first windshield has an annular structure arranged along an outer circumference of the air return gate, and the accommodating groove is an annular groove.

[0289] In some embodiments, the ceiling recessed fan also includes a thermal insulation layer arranged on the inner wall of the accommodating groove and / or the second windshield.

[0290] In some embodiments, the air outlet assembly includes an air outlet frame, wherein a first air outlet is formed between the air outlet frame and the main body frame, and the air outlet frame is lifted independently.

[0291] In some embodiments, the air outlet assembly includes an air outlet frame and an air return panel, wherein a first air outlet is formed between the air outlet frame and the main body frame, the air return panel is provided with an air return gate, and the air outlet frame and the air return panel are connected and lifted together.

[0292] In some embodiments, the air outlet assembly is provided with at least one second air outlet communicating with the air outlet duct.

[0293] When the air outlet assembly descends to an operation position, the first windshield and the second windshield form cooperation to block the flow of the airflow between the air return gate and the first air outlet and between the air return gate and the second air outlet.

[0294] In some embodiments, when the air outlet assembly descends so that a first air outlet is formed between the air outlet assembly and the main body frame, a gap which is formed between the air outlet assembly and the main body frame, forms an air supply duct. One end of the air supply duct communicates with the air outlet duct, and the other end of the air supply duct forms a first air outlet.

[0295] In some embodiments, the main body frame further includes a side frame, and when the air outlet assembly descends so that a first air outlet is formed between the air outlet assembly and the main body frame, an air supply duct is formed between the air outlet assembly and the side frame. The projection of the air outlet assembly at least partially coincides with the projection of the side frame on the mounting planar face of the main body frame.

[0296] In some embodiments, the ceiling recessed fan has a first air output mode, a second air output mode and a third air output mode: when the ceiling recessed fan is in the first air output mode, the first air outlet is open, and the second air outlet is closed; when the ceiling recessed fan is in the second air output mode, the first air outlet is open, and some or all the second air outlets are open; when the ceiling recessed fan is in the third air output mode, the first air outlet is closed, and some or all the second air outlets are open.

[0297] In some embodiments, when the ceiling recessed fan is in a cooling mode, the ceiling recessed fan is in the first air output mode or the second air output mode; and when the ceiling recessed fan is in a heating mode, the ceiling recessed fan is in the third air output mode or the second air output mode.

[0298] The ceiling recessed fan provided by some embodiments of the present disclosure is provided with a first windshield and a second windshield. The first windshield is provided with an accommodating groove, and the second end of the second windshield is movably arranged in the accommodating groove. When the air outlet assembly descends to an operation position, the first windshield cooperates with the second windshield so as to block the flow of the airflow between the air return gate and the air outlet, thereby preventing the air output from entering the air return gate through the movement gap and reducing the generation of condensation.

[0299] According to a fifth embodiment of the present disclosure, a ceiling recessed fan is provided to solve the problem that the structure of the air outlet assembly is unreasonably provided so that it is likely to generate vortex so as to cause the air volume that has been found by the inventors.

[0300] The present disclosure provides a ceiling recessed fan, including a main body frame, an air outlet assembly and a lifting mechanism. The main body frame is internally formed with an air outlet duct, and the air outlet assembly is connected to the main body frame through a lifting mechanism. The air outlet assembly descends so that a first air outlet is formed between the air outlet assembly and the main body frame. The ceiling recessed fan further includes: a vent cover plate arranged on the air outlet assembly and located between the air outlet duct and the air return gate. The vent cover plate has an arc-shaped air deflecting surface for deflecting the airflow to the first air outlet.

[0301] In some embodiments, the vent cover plate is an arc-shaped plate, and covers at least part of the structure of the air outlet assembly.

[0302] In some embodiments, there is a movement gap between the main body frame and the air outlet assembly, and the movement gap communicates with the air return gate of the ceiling recessed fan. The main body frame is provided with a first windshield located at the position of the movement gap. When the air outlet assembly descends to an operation position, the first windshield and the vent cover plate form cooperation to block the movement gap.

[0303] In some embodiments, when the air outlet assembly descends to an operation position, the vent cover plate is in lapped joint with the first windshield so as to block the movement gap.

[0304] In some embodiments, the main body frame is provided with a second windshield located above the first windshield. When the air outlet assembly ascends to a retracted position, the vent cover plate and the second windshield form cooperation so as to block the movement gap.

[0305] In some embodiments, the first windshield and / or the second windshield are / is a reinforcement rib on the main body frame.

[0306] In some embodiments, the distance between the first windshield and the second windshield is a descending height of the air outlet assembly.

[0307] In some embodiments, the air outlet assembly is provided with an air deflector arranged at the position of the first air outlet, and the air deflector has an air deflecting surface in smooth transition with the air deflecting surface.

[0308] In some embodiments, the air outlet assembly is provided with an air deflector, and the air deflector has a lapped joint portion. The lapped joint portion is in lapped joint with the vent cover plate, and the air deflecting surface of the air deflector is connected with the air deflecting surface through the lapped joint portion.

[0309] In some embodiments, the air outlet assembly includes an air outlet frame, wherein a first air outlet is formed between the air outlet frame and the main body frame, and the air outlet frame is lifted independently.

[0310] In some embodiments, the air outlet assembly includes an air outlet frame and an air return panel, wherein a first air outlet is formed between the air outlet frame and the main body frame, the air return panel is provided with an air return gate, and the air outlet frame and the air return panel are connected and lifted together.

[0311] In some embodiments, the air outlet assembly is provided with at least one second air outlet communicating with the air outlet duct, and the air deflecting surface is configured to deflect the airflow to the first air outlet and / or the second air output.

[0312] In some embodiments, when the air outlet assembly descends so that a first air outlet is formed between the air outlet assembly and the main body frame, a gap which is formed between the air outlet assembly and the main body frame, forms an air supply duct. One end of the air supply duct communicates with the air outlet duct, and the other end of the air supply duct forms a first air outlet.

[0313] In some embodiments, the main body frame further includes a side frame, and when the air outlet assembly descends so that a first air outlet is formed between the air outlet assembly and the main body frame, an air supply duct is formed between the air outlet assembly and the side frame. The projection of the air outlet assembly at least partially coincides with the projection of the side frame on the mounting planar face of the main body frame.

[0314] In some embodiments, the ceiling recessed fan has a first air output mode, a second air output mode and a third air output mode: when the ceiling recessed fan is in the first air output mode, the first air outlet is open, and the second air outlet is closed; when the ceiling recessed fan is in the second air output mode, the first air outlet is open, and some or all the second air outlets are open; when the ceiling recessed fan is in the third air output mode, the first air outlet is closed, and some or all the second air outlets are open.

[0315] In some embodiments, when the ceiling recessed fan is in a cooling mode, the ceiling recessed fan is in the first air output mode or the second air output mode. When the ceiling recessed fan is in a heating mode, the ceiling recessed fan is in the third air output mode or the second air output mode.

[0316] The ceiling recessed fan provided by some embodiments of the present disclosure is provided with the vent cover plate, and the vent cover plate is provided with the air deflecting surface. When the ceiling recessed fan outputs air, and the airflow inside the ceiling recessed fan passes through the air deflecting surface, the airflow is deflected to the air outlet through the air deflecting surface, which reduces the generation of vortex and allows a more smooth air output, thereby reducing the air volume loss and improving the air output efficiency of the air conditioner.

[0317] According to a sixth embodiment of the present disclosure, in order to solve the technical problem in the art that the ceiling recessed fan involves a manufacturing difficulty and a poor air output effect that has been found by the inventors, a ceiling recessed fan that bears part of the weight of the air outlet assembly by a support assembly to reduce the weight required to be borne by the lifting mechanism so as to reduce the manufacturing difficulty and improve the air output effect is provided.

[0318] The present disclosure provides a ceiling recessed fan, including: a main body frame; a lifting mechanism arranged in the main body frame; an air outlet assembly arranged on the lifting mechanism capable of driving the air outlet assembly to ascend and descend; a support assembly arranged in the main body frame, and capable of providing a support force for the air outlet assembly, wherein the direction of the support force is opposite to the direction of the gravity.

[0319] The air outlet assembly has an operation position that descends to a predetermined height and forms a first air outlet with the main body frame. The air outlet assembly has a first windshield at the position of the first air outlet, and the main body frame has a second windshield at the position of the first air outlet. When the air outlet assembly descends to an operation position, the first windshield cooperates with the second windshield to block the air return gate and the first air outlet. The support assembly is arranged between the first windshield and the second windshield.

[0320] The upper edge of the first windshield is bent towards the second windshield to form a first bent portion, and the upper edge of the second windshield is bent towards the first windshield to form a second bent portion, and the support assembly is arranged between the first bent portion and the second bent portion. Alternatively, the upper edge of the first windshield is bent towards the second windshield to form a first bent portion, and the lower edge of the second windshield is bent towards the first windshield to form a third bent portion, and the support assembly is arranged between the first bent portion and the third bent portion.

[0321] The air outlet assembly is provided with a first boss, the main body frame includes a first mounting structure above the first boss, the first end of the support assembly is arranged on the first mounting structure, and the second end of the support assembly is arranged on the first boss.

[0322] The air outlet assembly is provided with a first boss, the main body frame includes a second mounting structure below the first boss, the first end of the support assembly is arranged on the second mounting structure, and the second end of the support assembly is arranged on the first boss.

[0323] The main body frame is provided with a connector, the upper end of which is arranged in the main body frame, and the lower end of which is bent in a direction away from the center of the main body frame to form the second mounting structure.

[0324] The air outlet assembly has an operation position that descends to a predetermined height and forms a first air outlet with the main body frame. The air outlet assembly has a first windshield at the position of the first air outlet, and the main body frame has a second windshield at the position of the first air outlet. When the air outlet assembly descends to an operation position, the first windshield cooperates with the second windshield to block the air return gate and the first air outlet. The second windshield forms a connector.

[0325] In the vertical direction, the support assembly has a first end and a second end opposite to each other, wherein the first end is arranged in the main body frame, and the second end is arranged on the air outlet assembly, and the second end can be remote from or proximate to the first end.

[0326] The support assembly includes a deformation member, which is deformed during the lifting process of the air outlet assembly.

[0327] The deformation member includes a spring, which is compressed or stretched during the lifting process of the air outlet assembly; and / or, the deformation member includes a balloon, which is compressed or stretched in the vertical direction when the air outlet assembly descends.

[0328] The air outlet assembly includes an air outlet frame, wherein a first air outlet is formed between the air outlet frame and the main body frame, and the air outlet frame is lifted independently.

[0329] The air outlet assembly includes an air outlet frame and an air return panel, wherein a first air outlet is formed between the air outlet frame and the main body frame, the air return panel is provided with an air return gate, and the air outlet frame and the air return panel are connected and lifted together.

[0330] The main body frame is internally formed with an air outlet duct. The air outlet assembly is arranged in the main body frame in a way so as to be able to be raised and lowered, and descending to form a first air outlet with the main body frame. The air outlet assembly is provided with at least one second air outlet communicating with the air outlet duct.

[0331] When the air outlet assembly descends so that a first air outlet is formed between the air outlet assembly and the main body frame, a gap which is formed between the air outlet assembly and the main body frame, forms an air supply duct. One end of the air supply duct communicates with the air outlet duct, and the other end of the air supply duct forms a first air outlet.

[0332] The main body frame further includes a side frame, and when the air outlet assembly descends so that a first air outlet is formed between the air outlet assembly and the main body frame, an air supply duct is formed between the air outlet assembly and the side frame. The projection of the air outlet assembly at least partially coincides with the projection of the side frame on the mounting planar face of the main body frame.

[0333] The ceiling recessed fan has a first air output mode, a second air output mode and a third air output mode: When the ceiling recessed fan is in the first air output mode, the first air outlet is open, and the second air outlet is closed. When the ceiling recessed fan is in the second air output mode, the first air outlet is open, and some or all the second air outlets are open. When the ceiling recessed fan is in the third air output mode, the first air outlet is closed, and some or all the second air outlets are open.

[0334] When the ceiling recessed fan is in a cooling mode, the ceiling recessed fan is in the first air output mode or the second air output mode.

[0335] When the ceiling recessed fan is in a heating mode, the ceiling recessed fan is in the third air output mode or the second air output mode.

[0336] In the ceiling recessed fan provided by the present disclosure, a support assembly is provided so that part of the gravity of the air outlet assembly is borne by the main body frame, which effectively reduces the lifting force required to be provided by the lifting mechanism. In the case where the air outlet assembly with the same mass in the related art is lifted, the support assembly can apparently reduce the structural requirements of the lifting mechanism, thereby reducing the manufacturing difficulty of the lifting mechanism and reducing the overall structural dimensions of the ceiling recessed fan.

[0337] According to a seventh aspect of the present disclosure, in order to solve the technical problem in the related art that downdraft airflow cooling of the ceiling recessed fan makes people uncomfortable that has been found by the inventors, a ceiling recessed fan with an air supply duct which includes an air outlet assembly arranged in a way so as to be able to raised and lowered and forms an air supply duct is provided.

[0338] The present disclosure provides a ceiling recessed fan with an air supply duct, including: a main body frame internally formed with an air outlet duct; an air outlet assembly arranged in the main body frame in a way so as to be able to be raised and lowered, and descending to form a first air outlet with the main body frame; the air outlet assembly is provided with at least one second air outlet communicating with the air outlet duct.

[0339] When the air outlet assembly descends so that a first air outlet is formed between the air outlet assembly and the main body frame, a gap which is formed between the air outlet assembly and the main body frame, forms an air supply duct. One end of the air supply duct communicates with the air outlet duct, and the other end of the air supply duct forms a first air outlet.

[0340] The projection of the air outlet assembly at least partially coincides with the projection of the main body frame on the mounting planar face of the main body frame.

[0341] The ceiling recessed fan further includes an air deflector which is rotatably arranged at the second air outlet and capable of closing or opening the second air outlet.

[0342] The air deflector is provided with a plurality of partition plates. All the partition plates are arranged in parallel along the length direction of the air deflector, and a flow channel is formed between two adjacent partition plates.

[0343] A step sealing structure is provided between the edge of the air deflector and the edge of the second air outlet.

[0344] The edge of the air deflector is provided with a first step structure, and the edge of the second air outlet is provided with a second step structure, so that the first step structure and the second step structure are fit to form a step sealing structure.

[0345] The first step structure includes an elastic sealing material; and / or, the second step structure includes an elastic sealing material.

[0346] The ceiling recessed fan also includes at least two partition plates, all the partition plates are arranged in the air outlet duct, and a flow channel is formed between the two adjacent partition plates.

[0347] The ceiling recessed fan also includes a lifting mechanism arranged in the main body frame, and the air outlet assembly is arranged on the lifting mechanism.

[0348] The lifting mechanism is connected to one side of the air outlet assembly away from the air return gate of the ceiling recessed fan.

[0349] The lifting mechanism is connected to the corner of the air outlet assembly.

[0350] The lifting mechanism includes: a driving device; a transmission mechanism connected with the air outlet assembly and drivingly connected with the driving device, wherein the drive device drives the air outlet assembly to ascend and descend through the transmission mechanism; the transmission mechanism includes a guiding portion; and a guiding mechanism, wherein the guiding mechanism and the guiding portion are movable relative to each other in a lifting direction of the air outlet assembly, and at the same time, the guiding mechanism is in limiting fit with the guiding portion in a horizontal direction.

[0351] The guiding mechanism includes a guiding unit, and the guiding unit has two guiding members arranged oppositely. A guiding channel is formed between the two guiding members, and the guiding portion is located in the guiding channel.

[0352] There are a plurality of guiding units arranged at intervals along the lifting direction of the air outlet assembly.

[0353] The transmission mechanism includes: a gear mounted on an output shaft of the driving device; a rack fixedly connected with the air outlet assembly and meshed with the gear, wherein the driving device drives the air outlet assembly to ascend and descend by cooperation between the gear and the rack; and the guiding portion is located on the rack. The guiding portion is a guiding column on the rack, and the two opposite guiding members are provided with guiding grooves matched with the guiding columns, and the guiding columns are clamped between the two guiding members through the guiding grooves.

[0354] The first side of the rack is provided with a meshing tooth, the second side is provided with a guiding portion, and the rack is provided with a mounting groove located between the meshing tooth and the guiding portion.

[0355] The two guiding members of the guiding unit are located on both sides of the guiding portion respectively, and one of the guiding members of the guiding unit is located in the mounting groove.The extension direction of the mounting groove is the lifting direction of the air outlet assembly, and the mounting groove has a first end wall located above and a second end wall located below along a lifting direction of the air outlet assembly, and the maximum distance between the first end wall and the guiding unit is equal to a maximum descending height of the air outlet assembly.

[0356] The guiding member includes a slider in sliding fit with the guiding portion and / or a roller in rolling fit with the guiding portion.

[0357] The lifting mechanism also includes a mounting box arranged in the main body frame, and the transmission mechanism and the guiding mechanism are mounted in the mounting box.

[0358] The driving device is arranged outside the mounting box, and the output shaft of the electric motor passes through the inside of the mounting box.

[0359] The air outlet assembly is provided with a first windshield, and the main body frame is provided with a second windshield. The first windshield cooperates with the second windshield to block the air return gate and the air outlet duct, and the first windshield can move relative to the second windshield.

[0360] A sealing member is provided between the contact surfaces of the first windshield and the second windshield.

[0361] The included angle β between the air output direction of the first air outlet and the horizontal plane is in the angle range of -20°≤β≤45°; and when β=0°, the air output direction of the first air outlet is parallel to the horizontal direction; and when β>0°, the air output direction of the first air outlet tilts upwards relative to the horizontal direction.

[0362] The included angle β between the air output direction of the first air outlet and the horizontal plane is in the angle range of 0°≤β≤30°, and when β>0°, the air output direction of the first air outlet tilts upward relative to the horizontal plane.

[0363] The air outlet assembly has a first descending height L1, and the value of the predetermined height L1 is in the range of 15mm≤L1≤60mm.

[0364] The air outlet assembly has a first descending height L1, and the value of the predetermined height L1 is in the range of 20mm≤L1≤50mm.

[0365] The ceiling recessed fan has a first air output mode, a second air output mode and a third air output mode: When the ceiling recessed fan is in the first air output mode, the first air outlet is open, and the second air outlet is closed; When the ceiling recessed fan is in the second air output mode, the first air outlet is open, and some or all the second air outlets are open; When the ceiling recessed fan is in the third air output mode, the first air outlet is closed, and some or all the second air outlets are open.

[0366] When the ceiling recessed fan is in a cooling mode, the ceiling recessed fan is in the first air output mode or the second air output mode.

[0367] When the ceiling recessed fan is in a heating mode, the ceiling recessed fan is in the third air output mode or the second air output mode.

[0368] The main body frame includes a side frame; and when the air outlet assembly descends to form a first air outlet with the main body frame, the air supply duct is formed between the air outlet assembly and the side frame, the part of the side frame for forming the air supply duct is arranged obliquely relative to a horizontal plane; and / or, the part of the air outlet assembly for forming the air supply duct is arranged obliquely relative to a horizontal plane.

[0369] The tilting angle a formed between the part of the side frame for forming the air supply duct and a horizontal plane is in the angle range of -20°≤a≤45°, and when a=0°, the part of the side frame for forming the air supply duct is parallel to a horizontal direction, and when a>0°, the part of the side frame for forming the air supply duct tilts upward relative to the horizontal plane; and / or, the tilting angle a formed between the part of the air outlet assembly for forming the air supply duct and a horizontal plane is in the angle range of -20°≤b≤45°, and when b=0°, the part of the air outlet assembly for forming the air supply duct is parallel to a horizontal direction, and when b>0°, the part of the air outlet assembly for forming the air supply duct tilts upward relative to a horizontal plane.

[0370] The air outlet assembly includes an air outlet frame, which is lifted independently.

[0371] The air outlet assembly includes an air outlet frame and an air return panel, the air return panel is provided with an air return gate, and the air outlet frame and the air return panel are connected and lifted together.

[0372] In the ceiling recessed fan with an air supply duct provided by the present disclosure, the air outlet assembly descends and the first air outlet is formed between the air outlet assembly and the main body frame, so that the ceiling recessed fan outputs air distally, thereby effectively overcoming the problem that it is only possible to generate a downdraft airflow blow in the related art that have been found by the inventors. The first air outlet may output air horizontally or even obliquely upwards by tilting of the air outlet assembly, tilting of the side frame and / or a method of at least partially coinciding a projection of the air outlet assembly with the side frame, so as to realize a "waterfall" refrigeration. At the same time, in order to improve the air output effect, a second air outlet for downward air output is also provided, so that the ceiling recessed fan can simultaneously meet the requirements of downward air output in the related art at the same time, and an air output method of the ceiling recessed fan is increased by opening and closing the first air outlet and the second air outlet, thereby further improving the air output effect of the ceiling recessed fan.

[0373] According to an eighth embodiment of the present disclosure, the present disclosure discloses a ceiling recessed fan to solve the problem of vibration of the air outlet assembly during the lifting process that has been found by the inventors.

[0374] The present disclosure discloses a ceiling recessed fan, which includes a main body frame, an air outlet assembly and a lifting mechanism, wherein the air outlet assembly is connected to the main body frame through the lifting mechanism. The lifting mechanism includes a driving device, a transmission mechanism and a guiding mechanism, wherein the transmission mechanism is connected with the air outlet assembly and the transmission mechanism is drivingly connected with the driving device which drives the air outlet assembly to ascend and descend through the transmission mechanism. The transmission mechanism has a guiding portion. The guiding mechanism and the guiding portion may move relative to each other in the lifting direction of the air outlet assembly. At the same time, the guiding mechanism is in limiting fit with the guiding portion in the horizontal direction.

[0375] In some embodiments, the guiding mechanism includes a guiding unit, and the guiding unit has two guiding members arranged oppositely. A guiding channel is formed between the two guiding members, and the guiding portion is located in the guiding channel.

[0376] In some embodiments, there are a plurality of guiding units arranged at intervals along the lifting direction of the air outlet assembly.

[0377] In some embodiments, the transmission mechanism includes: a gear mounted on an output shaft of the driving device; a rack fixedly connected with the air outlet assembly and meshed with the gear, wherein the driving device drives the air outlet assembly to ascend and descend by cooperation between the gear and the rack; and the guiding portion is located on the rack.

[0378] In some embodiments, the guiding portion is a guiding column on the rack, and the two opposite guiding members are provided with guiding grooves matched with the guiding columns, and the guiding columns are clamped between the two guiding members through the guiding grooves.

[0379] In some embodiments, the first side of the rack is provided with a meshing tooth, and the second side is provided with a guiding portion. The rack is provided with a mounting groove located between the meshing tooth and the guiding portion. Two guiding members of the guiding unit are located on both sides of the guiding portion respectively, and one of the guiding members of the guiding unit is located in the mounting groove.

[0380] In some embodiments, the extension direction of the mounting groove is the lifting direction of the air outlet assembly, and the mounting groove has a first end wall located above and a second end wall located below along a lifting direction of the air outlet assembly, and the maximum distance between the first end wall and the guiding unit is equal to a maximum descending height of the air outlet assembly.

[0381] In some embodiments, the guiding member includes a slider in sliding fit with the guiding portion and / or a roller in rolling fit with the guiding portion.

[0382] In some embodiments, the guiding mechanism includes two guiding units arranged at intervals along the lifting direction of the air outlet assembly, and the guiding unit and the guiding portion are in sliding fit in the lifting direction of the air outlet assembly. At the same time, the guiding mechanism and the guiding portion are in limiting fit in the horizontal direction. For the maximum descending height B of the air outlet assembly and the spacing distance C between the two guiding units, the ratio of B / C is in the range of 2:1 to 4:1.

[0383] In some embodiments, the transmission mechanism includes: a gear mounted on an output shaft of the driving device; a rack fixedly connected with the air outlet assembly and meshed with the gear, wherein the driving device drives the air outlet assembly to ascend and descend by cooperation between the gear and the rack; and the guiding portion is located on the rack; for a length A of the rack along a lifting direction of the air outlet assembly, the ratio of A / C is in the range of 3:1 to 5:1.

[0384] In some embodiments, the air outlet assembly includes an air outlet frame, wherein an air outlet is formed between the air outlet frame and the main body frame, and the air outlet frame is lifted independently.

[0385] In some embodiments, the air outlet assembly includes an air outlet frame and an air return panel, wherein an air outlet is formed between the air outlet frame and the main body frame, the air return panel is provided with an air return gate, and the air outlet frame and the air return panel are connected and lifted together.

[0386] In some embodiments, the lifting mechanism also includes a mounting box arranged in the main body frame, and the transmission mechanism and the guiding mechanism are mounted in the mounting box.

[0387] In some embodiments, the mounting box includes: a box body fixedly connected with the main body frame; and a box cover detachably arranged on the box body.

[0388] In some embodiments, the driving device is arranged outside the mounting box, and the output shaft of the electric motor passes through the inside of the mounting box.

[0389] In the ceiling recessed fan provided by some embodiments of the present disclosure, the transmission mechanism is provided with the guiding portion, so that the transmission mechanism cooperates with the guiding mechanism through the guiding portion, and the guiding mechanism restricts the movement direction of the transmission mechanism, so that the transmission mechanism moves in the lifting direction of the air outlet assembly without shaking in the horizontal direction, which allows that the transmission mechanism and the driving mechanism cooperate with each other more closely and stably, thereby lessening the vibration of the transmission mechanism during the driving process and reducing the generation of noise.

[0390] The present disclosure discloses a recessed air conditioner with a transmission mechanism to solve the problem of vibration of the air outlet assembly during the lifting process that has been found by the inventors.

[0391] The present disclosure discloses a recessed air conditioner with a transmission mechanism, which includes a main body frame, an air outlet assembly and a lifting mechanism, wherein the air outlet assembly is connected to the main body frame through the lifting mechanism. The lifting mechanism includes a driving device, a transmission mechanism and a guiding mechanism, wherein the transmission mechanism is connected with the air outlet assembly and the transmission mechanism is drivingly connected with the driving device which drives the air outlet assembly to ascend and descend through the transmission mechanism. The transmission mechanism has a guiding portion. The guiding mechanism and the guiding portion may move relative to each other in the lifting direction of the air outlet assembly. At the same time, the guiding mechanism is in limiting fit with the guiding portion in the horizontal direction.

[0392] In some embodiments, the guiding mechanism includes a guiding unit, and the guiding unit has two guiding members arranged oppositely. A guiding channel is formed between the two guiding members, and the guiding portion is located in the guiding channel.

[0393] In some embodiments, there are a plurality of guiding units arranged at intervals along the lifting direction of the air outlet assembly.

[0394] In some embodiments, the transmission mechanism includes: a gear mounted on an output shaft of the driving device; a rack fixedly connected with the air outlet assembly and meshed with the gear, wherein the driving device drives the air outlet assembly to ascend and descend by cooperation between the gear and the rack; and the guiding portion is located on the rack.

[0395] In some embodiments, the guiding portion is a guiding column on the rack, and the two opposite guiding members are provided with guiding grooves matched with the guiding columns, and the guiding columns are clamped between the two guiding members through the guiding grooves.

[0396] In some embodiments, the first side of the rack is provided with a meshing tooth, and the second side is provided with a guiding portion. The rack is provided with a mounting groove located between the meshing tooth and the guiding portion. Two guiding members of the guiding unit are located on both sides of the guiding portion respectively, and one of the guiding members of the guiding unit is located in the mounting groove.

[0397] In some embodiments, the extension direction of the mounting groove is the lifting direction of the air outlet assembly, and the mounting groove has a first end wall located above and a second end wall located below along a lifting direction of the air outlet assembly, and the maximum distance between the first end wall and the guiding unit is equal to a maximum descending height of the air outlet assembly.

[0398] In some embodiments, the guiding member includes a slider in sliding fit with the guiding portion and / or a roller in rolling fit with the guiding portion.

[0399] In some embodiments, the guiding mechanism includes two guiding units arranged at intervals along the lifting direction of the air outlet assembly, and the guiding unit and the guiding portion are in sliding fit in the lifting direction of the air outlet assembly. At the same time, the guiding mechanism and the guiding portion are in limiting fit in the horizontal direction. For the maximum descending height B of the air outlet assembly and the spacing distance C between the two guiding units, the ratio of B / C is in the range of 1:1 to 4:1.

[0400] In some embodiments, the transmission mechanism includes: a gear mounted on an output shaft of the driving device; a rack fixedly connected with the air outlet assembly and meshed with the gear, wherein the driving device drives the air outlet assembly to ascend and descend by cooperation between the gear and the rack; and the guiding portion is located on the rack; for a length A of the rack along a lifting direction of the air outlet assembly, the ratio of A / C is in the range of 2:1 to 5:1.

[0401] In some embodiments, the air outlet assembly includes an air outlet frame, wherein an air outlet is formed between the air outlet frame and the main body frame, and the air outlet frame is lifted independently.

[0402] In some embodiments, the air outlet assembly includes an air outlet frame and an air return panel, wherein an air outlet is formed between the air outlet frame and the main body frame, the air return panel is provided with an air return gate, and the air outlet frame and the air return panel are connected and lifted together.

[0403] In some embodiments, the lifting mechanism also includes a mounting box arranged in the main body frame, and the transmission mechanism and the guiding mechanism are mounted in the mounting box.

[0404] In some embodiments, the mounting box includes: a box body fixedly connected with the main body frame; and a box cover detachably arranged on the box body.

[0405] In some embodiments, the driving device is arranged outside the mounting box, and the output shaft of the electric motor passes through the inside of the mounting box.

[0406] In some embodiments, the air outlet assembly descends to form an air supply duct with the main body frame, so that one end of the air supply duct forms a first air outlet, and the other end of the air supply duct communicates with an air outlet duct of the recessed air conditioner.

[0407] In some embodiments, the air outlet assembly is also provided with a second air outlet communicating with the air outlet duct of the recessed air conditioner.

[0408] In some embodiments, the air outlet assembly is provided with an air deflector located at the position of the first air outlet and / or the second air outlet.

[0409] In some embodiments, the projection of the air outlet assembly on the ground coincides with the projection of the main body frame on the ground.

[0410] In the recessed air conditioner provided by some embodiments of the present disclosure, the transmission mechanism is provided with the guiding portion, so that the transmission mechanism cooperates with the guiding mechanism through the guiding portion, and the guiding mechanism restricts the movement direction of the transmission mechanism, so that the transmission mechanism moves in the lifting direction of the air outlet assembly without shaking in the horizontal direction, which allows that the transmission mechanism and the driving mechanism cooperate with each other more closely and stably, thereby lessening the vibration of the transmission mechanism during the driving process and reducing the generation of noise.

[0411] In order to solve the technical problem in the related art that downdraft airflow cooling of the ceiling recessed fan makes people uncomfortable that has been found by the inventors, a ceiling recessed fan with an air supply duct which includes an air outlet assembly arranged in a way so as to be able to raised and lowered and forms an air supply duct is provided.

[0412] Therefore, the present disclosure provides a ceiling recessed fan with an air supply duct, including: a main body frame internally formed with an air outlet duct; an air outlet assembly is arranged in the main body frame in a way so as to be able to be raised and lowered, and descending to form a first air outlet with the main body frame; the air outlet assembly is provided with at least one second air outlet communicating with the air outlet duct.

[0413] When the air outlet assembly descends so that a first air outlet is formed between the air outlet assembly and the main body frame, a gap which is formed between the air outlet assembly and the main body frame, forms an air supply duct. One end of the air supply duct communicates with the air outlet duct, and the other end of the air supply duct forms a first air outlet.

[0414] The projection of the air outlet assembly at least partially coincides with the projection of the main body frame on the mounting planar face of the main body frame.

[0415] The ceiling recessed fan further includes an air deflector which is rotatably arranged at the second air outlet and capable of closing or opening the second air outlet.

[0416] The air deflector is provided with a plurality of partition plates. All the partition plates are arranged in parallel along the length direction of the air deflector, and a flow channel is formed between two adjacent partition plates.

[0417] A step sealing structure is provided between the edge of the air deflector and the edge of the second air outlet.

[0418] The edge of the air deflector is provided with a first step structure, and the edge of the second air outlet is provided with a second step structure, so that the first step structure and the second step structure are fit to form a step sealing structure.

[0419] The first step structure includes an elastic sealing material; and / or, the second step structure includes an elastic sealing material.

[0420] The ceiling recessed fan also includes at least two partition plates, all the partition plates are arranged in the air outlet duct, and a flow channel is formed between the two adjacent partition plates.

[0421] The ceiling recessed fan also includes a lifting mechanism arranged in the main body frame, and the air outlet assembly is arranged on the lifting mechanism.

[0422] The lifting mechanism is connected to one side of the air outlet assembly away from the air return gate of the ceiling recessed fan.

[0423] The lifting mechanism is connected to the corner of the air outlet assembly.

[0424] The lifting mechanism includes: a driving device; a transmission mechanism connected with the air outlet assembly and drivingly connected with the driving device, wherein the drive device drives the air outlet assembly to ascend and descend through the transmission mechanism; the transmission mechanism includes a guiding portion; and a guiding mechanism, wherein the guiding mechanism and the guiding portion are movable relative to each other in a lifting direction of the air outlet assembly, and at the same time, the guiding mechanism is in limiting fit with the guiding portion in a horizontal direction.

[0425] The guiding mechanism includes a guiding unit, and the guiding unit has two guiding members arranged oppositely. A guiding channel is formed between the two guiding members, and the guiding portion is located in the guiding channel.

[0426] There are a plurality of guiding units arranged at intervals along the lifting direction of the air outlet assembly.

[0427] The transmission mechanism includes: a gear mounted on an output shaft of the driving device; a rack fixedly connected with the air outlet assembly and meshed with the gear, wherein the driving device drives the air outlet assembly to ascend and descend by cooperation between the gear and the rack; and the guiding portion is located on the rack.

[0428] The guiding portion is a guiding column on the rack, and the two opposite guiding members are provided with guiding grooves matched with the guiding columns, and the guiding columns are clamped between the two guiding members through the guiding grooves.

[0429] The first side of the rack is provided with a meshing tooth, the second side is provided with a guiding portion, and the rack is provided with a mounting groove located between the meshing tooth and the guiding portion; The two guiding members of the guiding unit are located on both sides of the guiding portion respectively, and one of the guiding members of the guiding unit is located in the mounting groove.

[0430] The extension direction of the mounting groove is the lifting direction of the air outlet assembly, and the mounting groove has a first end wall located above and a second end wall located below along a lifting direction of the air outlet assembly, and the maximum distance between the first end wall and the guiding unit is equal to a maximum descending height of the air outlet assembly.

[0431] The guiding member includes a slider in sliding fit with the guiding portion and / or a roller in rolling fit with the guiding portion.

[0432] The lifting mechanism also includes a mounting box arranged in the main body frame, and the transmission mechanism and the guiding mechanism are mounted in the mounting box.

[0433] The driving device is arranged outside the mounting box, and the output shaft of the electric motor passes through the inside of the mounting box.

[0434] The air outlet assembly is provided with a first windshield, and the main body frame is provided with a second windshield. The first windshield cooperates with the second windshield to block the air return gate and the air outlet duct, and the first windshield can move relative to the second windshield.

[0435] A sealing member is provided between the contact surfaces of the first windshield and the second windshield.

[0436] The included angle β between the air output direction of the first air outlet and the horizontal plane is in the angle range of -20°≤β≤45°; and when β=0°, the air output direction of the first air outlet is parallel to the horizontal direction; and when β>0°, the air output direction of the first air outlet tilts upwards relative to the horizontal direction.

[0437] The included angle β between the air output direction of the first air outlet and the horizontal plane is in the angle range of 0°≤β≤30°, and when β>0°, the air output direction of the first air outlet tilts upward relative to the horizontal plane.

[0438] The air outlet assembly has a first descending height L1, and the value of the predetermined height L1 is in the range of 15mm≤L1≤60mm.

[0439] The air outlet assembly has a first descending height L1, and the value of the predetermined height L1 is in the range of 20mm≤L1≤50mm.

[0440] The ceiling recessed fan has a first air output mode, a second air output mode and a third air output mode: When the ceiling recessed fan is in the first air output mode, the first air outlet is open, and the second air outlet is closed; When the ceiling recessed fan is in the second air output mode, the first air outlet is open, and some or all the second air outlets are open. When the ceiling recessed fan is in the third air output mode, the first air outlet is closed, and some or all the second air outlets are open.

[0441] When the ceiling recessed fan is in a cooling mode, the ceiling recessed fan is in the first air output mode or the second air output mode. When the ceiling recessed fan is in a heating mode, the ceiling recessed fan is in the third air output mode or the second air output mode.

[0442] The main body frame includes a side frame; and when the air outlet assembly descends to form a first air outlet with the main body frame, the air supply duct is formed between the air outlet assembly and the side frame, the part of the side frame for forming the air supply duct is arranged obliquely relative to a horizontal plane; and / or, the part of the air outlet assembly for forming the air supply duct is arranged obliquely relative to a horizontal plane.

[0443] The tilting angle a formed between the part of the side frame for forming the air supply duct and a horizontal plane is in the angle range of -20°≤a≤45°, and when a=0°, the part of the side frame for forming the air supply duct is parallel to a horizontal direction, and when a>0°, the part of the side frame for forming the air supply duct tilts upward relative to the horizontal plane; and / or, the tilting angle a formed between the part of the air outlet assembly for forming the air supply duct and a horizontal plane is in the angle range of -20°≤b≤45°, and when b=0°, the part of the air outlet assembly for forming the air supply duct is parallel to a horizontal direction, and when b>0°, the part of the air outlet assembly for forming the air supply duct tilts upward relative to a horizontal plane.

[0444] The air outlet duct has a first end and a second end along an airflow direction, the first air outlet and the second air outlet both communicate with the second end, and the ratio of the width D1 of the first end to the width D2 of the second air outlet is in the range of 0.75≤D2 / D1≤0.85.

[0445] The air outlet assembly includes an air outlet frame, which is lifted independently.

[0446] The air outlet assembly includes an air outlet frame and an air return panel, the air return panel is provided with an air return gate, and the air outlet frame and the air return panel are connected and lifted together.

[0447] In the ceiling recessed fan with an air supply duct provided by the present disclosure, the air outlet assembly descends and the first air outlet is formed between the air outlet assembly and the main body frame, so that the ceiling recessed fan performs air output distally, thereby effectively overcoming the problem that it is only possible to generate a downdraft airflow so as to cause skin blow in the related art that have been found by the inventors. The first air outlet may output air horizontally or even obliquely upwards by tilting of the air outlet assembly, tilting of the side frame and / or a method of at least partially coinciding a projection of the air outlet assembly with the side frame, so as to realize a "waterfall" refrigeration. At the same time, in order to improve the air output effect, a second air outlet for downward air output is also provided, so that the ceiling recessed fan can simultaneously meet the requirements of downward air output in the related art at the same time, and an air output method of the ceiling recessed fan is increased by opening and closing the first air outlet and the second air outlet, thereby further improving the air output effect of the ceiling recessed fan.BRIEF DESCRIPTION OF THE DRAWINGS

[0448] Figure 1 is a schematic structural view of a ceiling recessed fan according to a first embodiment of the present disclosure. Figure 2 is another schematic structural view of a ceiling recessed fan according to a first embodiment of the present disclosure. Figure 3 is a wind field simulation diagram of a ceiling recessed fan when h1 / h2 is about 0.47 according to a first embodiment of the present disclosure. Figure 4 is a wind field simulation diagram of a ceiling recessed fan when h1 / h2 is about 0.6 according to a first embodiment of the present disclosure. Figure 5 is a wind field simulation diagram of a ceiling recessed fan when h1 / h2 is about 0.75 according to a first embodiment of the present disclosure. Figure 6 is a wind field simulation diagram of a ceiling recessed fan when h1 / h2 is about 0.33 according to a first embodiment of the present disclosure. Figure 7 is a wind field simulation diagram of a ceiling recessed fan when h1 / h2 is about 0.25 according to a first embodiment of the present disclosure. Figure 8 is a schematic structural view of a ceiling recessed fan according to a second embodiment of the present disclosure. Figure 9 is another schematic structural view of a ceiling recessed fan according to a second embodiment of the present disclosure. Figure 10 is a wind field simulation diagram of a ceiling recessed fan when h1 / h2 is about 0.75 according to a second embodiment of the present disclosure. Figure 11 is a wind field simulation diagram of a ceiling recessed fan when h1 / h2 is about 0.8 according to a second embodiment of the present disclosure. Figure 12 is a wind field simulation diagram of a ceiling recessed fan when h1 / h2 is about 0.9 according to a second embodiment of the present disclosure. Figure 13 is a wind field simulation diagram of a ceiling recessed fan when h1 / h2 is about 0.67 according to a second embodiment of the present disclosure. Figure 14 is a wind field simulation diagram of a ceiling recessed fan when h1 / h2 is about 0.6 according to a second embodiment of the present disclosure. Figure 15 is a wind field simulation diagram of a ceiling recessed fan having an air deflector and when h1 / h2 is about 0.75 according to a second embodiment of the present disclosure. Figure 16 is a wind field simulation diagram of a ceiling recessed fan having an air deflector and when h1 / h2 is about 0.8 according to a second embodiment of the present disclosure. Figure 17 is a wind field simulation diagram of a ceiling recessed fan having an air deflector and when h1 / h2 is about 0.9 according to a second embodiment of the present disclosure. Figure 18 is a wind field simulation diagram of a ceiling recessed fan having an air deflector and when h1 / h2 is about 0.67 according to a second embodiment of the present disclosure. Figure 19 is a wind field simulation diagram of a ceiling recessed fan having an air deflector and when h1 / h2 is about 0.6 according to a second embodiment of the present disclosure. Figure 20 is a schematic structural view of a ceiling recessed fan according to a third embodiment of the present disclosure. Figure 21 is a cross-sectional view of a ceiling recessed fan according to a fourth embodiment of the present disclosure. Figure 22 is a bottom view of a ceiling recessed fan according to a fourth embodiment of the present disclosure. Figure 23 is a simulation view of a ceiling recessed fan when a ratio of D / h1 is 0.33 according to a fourth embodiment of the present disclosure. Figure 24 is a simulation view of a ceiling recessed fan when a ratio of D / h1 is 0.4 according to a fourth embodiment of the present disclosure. Figure 25 is a cross-sectional view of a ceiling recessed fan according to a fifth embodiment and a sixth embodiment of the present disclosure. Figure 26 is a wind field simulation view of a ceiling recessed fan when the angle c is -10° according to a fifth embodiment and a sixth embodiment of the present disclosure. Figure 27 is a wind field simulation view of a ceiling recessed fan when the angle c is 0° according to a fifth embodiment and a sixth embodiment of the present disclosure. Figure 28 is a wind field simulation view of a ceiling recessed fan when the angle c is 10° according to a fifth embodiment and a sixth embodiment of the present disclosure. Figure 29 is a wind field simulation view of a ceiling recessed fan when the angle c is 15° according to a fifth embodiment and a sixth embodiment of the present disclosure. Figure 30 is a wind field simulation view of a ceiling recessed fan when the angle c is -15° according to a fifth embodiment and a sixth embodiment of the present disclosure. Figure 31 is a cross-sectional view of a ceiling recessed fan according to a seventh embodiment of the present disclosure. Figure 32 is a bottom view of a ceiling recessed fan according to a seventh embodiment of the present disclosure. Figure 33 is another bottom view of a ceiling recessed fan according to a seventh embodiment of the present disclosure. Figure 34 is a schematic structural view of a ceiling recessed fan according to an eighth embodiment of the present disclosure. Figure 35 is another schematic structural view of a ceiling recessed fan according to an eighth embodiment of the present disclosure. Figure 36 is a schematic structural view of a ceiling recessed fan according to a ninth embodiment of the present disclosure. Figure 37 is a schematic structural view of a ceiling recessed fan according to a tenth embodiment of the present disclosure. Figure 38 is a schematic structural view of a ceiling recessed fan according to some embodiments provided by the present disclosure. Figure 39 is another schematic structural view of a ceiling recessed fan provided by some embodiments of the present disclosure. Figure 40 is a cross-sectional view of a ceiling recessed fan provided by some embodiments of the present disclosure. Figure 41 is a schematic structural view of a ceiling recessed fan provided by some embodiments of the present disclosure. Figure 42 is a cross-sectional view of a ceiling recessed fan according to some embodiments provided by the present disclosure. Figure 43 is a wind field simulation view when the angle c is -10° according to some embodiments provided by the present disclosure. Figure 44 is a wind field simulation view when the angle c is 0° according to some embodiments provided by the present disclosure. Figure 45 is a wind field simulation view when the angle c is 10° according to some embodiments provided by the present disclosure. Figure 46 is a wind field simulation view when the angle c is 15° according to some embodiments provided by the present disclosure. Figure 47 is a wind field simulation view when the angle c is -15° according to some embodiments provided by the present disclosure. Figure 48 is a schematic structural view of a ceiling recessed fan according to some embodiments provided by the present disclosure. Figure 49 is another schematic structural view of a ceiling recessed fan according to some embodiments provided by the present disclosure. Figure 50 is a wind field simulation diagram of a ceiling recessed fan when h1 / h2 is about 0.47 according to some embodiments provided by the present disclosure. Figure 51 is a wind field simulation diagram of a ceiling recessed fan when h1 / h2 is about 0.6 according to some embodiments provided by the present disclosure. Figure 52 is a wind field simulation diagram of a ceiling recessed fan when h1 / h2 is about 0.75 according to some embodiments provided by the present disclosure. Figure 53 is a wind field simulation diagram of a ceiling recessed fan when h1 / h2 is about 0.33 according to some embodiments provided by the present disclosure. Figure 54 is a wind field simulation diagram of a ceiling recessed fan when h1 / h2 is about 0.25 according to some embodiments provided by the present disclosure. ] Figure 55 is another schematic structural view of a ceiling recessed fan provided by some embodiments of the present disclosure. Figure 56 is a cross-sectional view of a ceiling recessed fan provided by some embodiments of the present disclosure. Figure 57 is a schematic structural view of a ceiling recessed fan provided by some embodiments of the present disclosure. Figure 58 is another schematic structural view of a ceiling recessed fan provided by some embodiments of the present disclosure. Figure 59 is a cross-sectional view of a ceiling recessed fan provided by some embodiments of the present disclosure. Figure 60 is a structural view of a ceiling recessed fan provided by some embodiments applying the present disclosure. Figure 61 is a structural view of another ceiling recessed fan applying the present disclosure. Figure 62 is a structural view of an air outlet and an air deflecting member according to another embodiment of the present disclosure. Figure 63 is a flowchart of a control method of a ceiling recessed fan according to an embodiment of the present disclosure. Figure 64 is a flowchart of a control method of a ceiling recessed fan according to another embodiment of the present disclosure. Figure 65 is a flowchart of a control method of a ceiling recessed fan according to a further embodiment of the present disclosure. Figure 66 is a structural block view of a control apparatus according to an embodiment of the present disclosure. Figure 67 is a structural block view of a control apparatus according to another embodiment of the present disclosure. Figure 68 is a schematic structural view of a ceiling recessed fan when the air outlet assembly descends to an operation position according to a first embodiment of the present disclosure. Figure 69 is a schematic view of an internal structure of a ceiling recessed fan according to a first embodiment of the present disclosure. Figure 70 is a schematic structural view of a lifting mechanism of a ceiling recessed fan according to a first embodiment of the present disclosure. Figure 71 is a schematic structural view of a ceiling recessed fan when in a first air output mode according to a second embodiment of the present disclosure. Figure 72 is a schematic structural view of a ceiling recessed fan when in a second air output mode according to a second embodiment of the present disclosure. Figure 73 is a schematic structural view of an air outlet assembly of a ceiling recessed fan in an operation position according to a third embodiment of the present disclosure. Figure 74 is a schematic structural view of a ceiling recessed fan according to a third embodiment of the present disclosure. Figure 75 is a schematic structural view of a ceiling recessed fan when in a first air output mode according to a fourth embodiment of the present disclosure. Figure 76 is a schematic structural view of a ceiling recessed fan when in a second air output mode according to a fourth embodiment of the present disclosure. Figure 77 is a schematic structural view of a ceiling recessed fan in an operation state according to a fifth embodiment of the present disclosure. Figure 78 is a schematic structural view of a ceiling recessed fan in a power-off state according to a fifth embodiment of the present disclosure. Figure 79 is a schematic structural view of a ceiling recessed fan when in a first air output mode according to a sixth embodiment of the present disclosure. Figure 80 is a schematic structural view of a ceiling recessed fan when in a second air output mode according to a sixth embodiment of the present disclosure. Figure 81 is a schematic structural view of a ceiling recessed fan according to a seventh embodiment of the present disclosure. Figure 82 is a schematic structural view of an air outlet assembly of a ceiling recessed fan descending to an operation position according to a seventh embodiment of the present disclosure. Figure 83 is a schematic structural view of a ceiling recessed fan when in a first air output mode according to an eighth embodiment of the present disclosure. Figure 84 is a schematic structural view of a ceiling recessed fan when in a second air output mode according to an eighth embodiment of the present disclosure. Figure 85 is a schematic structural view of a ceiling recessed fan in an operation position according to a ninth embodiment of the present disclosure. Figure 86 is a schematic structural view of a ceiling recessed fan in a retracted position according to a ninth embodiment of the present disclosure. Figure 87 is a schematic structural view of a ceiling recessed fan when in a first air output mode according to a tenth embodiment of the present disclosure. Figure 88 is a schematic structural view of a ceiling recessed fan when in a second air output mode according to a tenth embodiment of the present disclosure. Figure 89 is a schematic structural view of a ceiling recessed fan according to an eleventh embodiment of the present disclosure. Figure 90 is another schematic structural view of a ceiling recessed fan according to an eleventh embodiment of the present disclosure. Figure 91 is a schematic structural view of a ceiling recessed fan having a first boss according to a twelfth embodiment of the present disclosure. Figure 92 is a schematic structural view of a ceiling recessed fan having a first boss according to a thirteenth embodiment of the present disclosure. Figure 93 is a schematic structural view of a ceiling recessed fan according to a fourteenth embodiment of the present disclosure. Figure 94 is a schematic structural view of another ceiling recessed fan according to a fourteenth embodiment of the present disclosure. Figure 95 is a schematic structural view of a ceiling recessed fan having a first boss according to a fifteenth embodiment of the present disclosure. Figure 96 is a schematic structural view of a ceiling recessed fan having a first boss according to a sixteenth embodiment of the present disclosure. Figure 97 is a schematic structural view of a ceiling recessed fan according to a seventeenth embodiment of the present disclosure. Figure 98 is a schematic structural view of a ceiling recessed fan with the second air outlet opened according to a seventeenth embodiment of the present disclosure. Figure 99 is a schematic structural view of a ceiling recessed fan with the first air outlet opened according to a seventeenth embodiment of the present disclosure. Figure 100 is a schematic structural view of a ceiling recessed fan with the first air outlet and the second air outlet both opened according to a seventeenth embodiment of the present disclosure. Figure 101 is a schematic structural view of an air outlet assembly and an air deflector according to a seventeenth embodiment of the present disclosure. Figure 102 is a schematic structural view of a lifting mechanism according to a seventeenth embodiment of the present disclosure. Figure 103 is a schematic structural view of a lifting mechanism after descending according to a seventeenth embodiment of the present disclosure. Figure 104 is a cross-sectional view of the second air outlet opened according to a seventeenth embodiment of the present disclosure. Figure 105 is a cross-sectional view of the first air outlet opened according to a seventeenth embodiment of the present disclosure. Figure 106 is another cross-sectional view of the first air outlet opened according to a seventeenth embodiment of the present disclosure. Figure 107 is a cross-sectional view of the first air outlet and the second air outlet both opened according to a seventeenth embodiment of the present disclosure. Figure 108 is a schematic structural view of a lifting mechanism of an embedded air conditioner according to a first embodiment of the present disclosure. Figure 109 is a schematic structural view of a lifting mechanism of an embedded air conditioner in a descending state according to a first embodiment of the present disclosure. Figure 110 is a schematic structural view of an embedded air conditioner according to a first embodiment of the present disclosure. Figure 111 is a schematic structural view of an embedded air conditioner in a first air output mode according to a second embodiment of the present disclosure. Figure 112 is a schematic structural view of an embedded air conditioner in a second air output mode according to a second embodiment of the present disclosure. Figure 113 is a schematic structural view of a ceiling recessed fan provided by an embodiment of the present disclosure. Figure 114 is a schematic structural view of a ceiling recessed fan with the second air outlet opened provided by an embodiment of the present disclosure. Figure 115 is a schematic structural view of a ceiling recessed fan with the first air outlet opened provided by an embodiment of the present disclosure. Figure 116 is a schematic structural view of a ceiling recessed fan with the first air outlet and the second air outlet both opened provided by an embodiment of the present disclosure. Figure 117 is a schematic structural view of an air outlet assembly and an air deflector provided by an embodiment of the present disclosure. Figure 118 is a schematic structural view of a lifting mechanism provided by an embodiment of the present disclosure. Figure 119 is a schematic structural view of a lifting mechanism after descending provided by an embodiment of the present disclosure. Figure 120 is a cross-sectional view of the second air outlet opened provided by an embodiment of the present disclosure. Figure 121 is a cross-sectional view of the first air outlet opened provided by an embodiment of the present disclosure. Figure 122 is another cross-sectional view of the first air outlet opened provided by an embodiment of the present disclosure. Figure 123 is a cross-sectional view of the first air outlet and the second air outlet both opened provided by an embodiment of the present disclosure. Figure 124 is another schematic structural view of a ceiling recessed fan provided by an embodiment of the present disclosure. DESCRIPTION OF THE INVENTION

[0449] The implementation of the present disclosure will be introduced in detail in conjunction with Figs. 1 to 124.

[0450] Referring to Figs. 1 to 7, according to a first embodiment of the present disclosure, the following relationship is present between the air supply distance and the air output volume of the ceiling recessed fan in the related art: when the air supply distance is long, the air output volume thereof is attenuated more, and when the air supply distance is short, the air output volume is attenuated less. In view of the problem that the air output volume is attenuated more when the air supply distance is long present in the ceiling recessed fan that has been found by the inventors, in the related art, it is generally to simply increase the relevant parameters of the fan (the diameter and rotation speed of the fan) so as to raise the air output volume, which results in that it is necessary to increase the overall dimension of the ceiling recessed fan or add to the cost. However, the applicant has found through studies on the air output airflow of the ceiling recessed fan and analysis of the simulation experiment data that, the technical solution of increasing the relevant parameters of the fan actually does more harm than good, which is not conducive to further development of the industry. Whereas, the parameters concerning the dimension of the air outlet and the dimension of the air duct inside the ceiling recessed fan, which are neglected and ignored in the art, are aspects to be improved that effectively enhance a matching degree between the air supply distance and the air volume of the ceiling recessed fan in turn.

[0451] Therefore, in order to allow the air supply distance and the air output volume of the ceiling recessed fan in a cooling mode to reach a better level as much as possible, the present disclosure provides the ceiling recessed fan with a cooling mode as shown in Figs. 1 and 2, which includes a main body frame 1a internally provided with an air outlet duct 2a having a first end 21a and a second end 22a provided along the airflow direction; an air outlet assembly 3a arranged in the main body frame 1a, wherein there is a height difference between the air outlet assembly 3a and the main body frame 1a when the ceiling recessed fan is in a cooling mode, and an air outlet 10a is formed between the air outlet assembly 3a and the main body frame 1a, and the air outlet 10a communicates with the second end 22a of the air outlet duct 2a. The ratio range of the height h1 of the air outlet 10a to the width h2 of the first end 21a of the air outlet duct 2a is 1 / 3≤h1 / h2≤3 / 5.

[0452] It is to be noted that, the main body frame 1a is a main load-bearing structure of the ceiling recessed fan. When the ceiling recessed fan is installed, the main body frame 1a is used to be mounted on the ceiling, and other structures are directly or indirectly mounted on the main body frame 1a and fixed to the ceiling through the main body frame 1a. The height h1 of the air outlet 10a refers to the height between the edge of the main body frame forming the lowermost point of the air outlet duct and the outermost edge of the air outlet assembly in the direction of a height difference between the air outlet assembly and the main body frame.

[0453] During the operation of the ceiling recessed fan, the air flows from the first end 21a to the second end 22a of the air outlet duct, and is finally expelled from the ceiling recessed fan through the air outlet 10a. When the ceiling recessed fan is designed, in order to achieve the balance between the air supply distance and the air output volume of the ceiling recessed fane, the designer determines the specific parameters of the ceiling recessed fan according to the ratio range of the height h1 of the air outlet to the width of the first end 21a of the air outlet duct 2a, so that the air output effect of the produced ceiling recessed fan achieves preset requirements.

[0454] Taking the experiment data of a 3 horse power air conditioner as an example, in this solution, h2 is 60mm, and the value of h1 is adjusted for simulation. The simulation results are as follows: h1h1 / h2Air volume (m 3< / h)Air supply distance150.256673.3m200.338343.5m280.4710053.5m360.611122m450.7511121.2m

[0455] From the experiment results, when h1 / h2 is 0.47, the air volume is attenuated less and the air supply distance is also far enough, which is the most desirable (Figure 3). When h1 / h2 is increased to 0.6, the air volume reaches a maximum value, but the air supply distance is apparently shortened (Figure 4). When h1 / h2 continues to increase to 0.75, the air supply distance is severely shortened, which cannot be accepted (Figure 5). When h1 / h2 is reduced to 0.33, the air volume is about 75% of a maximum value (Figure 6). When h1 / h2 continues to decrease to 0.25, the air volume is severely attenuated, which cannot be accepted (Figure 7).

[0456] The air outlet assembly 3a is arranged in the main body frame 1a in a way so as to be able to be raised and lowered, and the air outlet assembly 3a has an operation position descending to a set height to form a height difference. When the air outlet assembly 3a is in an operation position, the ratio range of the height h1 of the air outlet 10a to the width h2 of the first end 21a of the air outlet duct 2a is 1 / 3≤h1 / h2≤3 / 5. At this time, the height h1 of the air outlet 10a is the height between the edge of the main body frame forming the lowermost point of the air outlet duct and the outermost edge of the air outlet assembly in the lifting direction of the air outlet assembly 3a.

[0457] The air outlet assembly 3a includes an air deflector 4a and an air outlet frame, wherein the air outlet frame is arranged in the main body frame 1a; the air deflector 4a is rotatably arranged on the air outlet frame; and when the air outlet assembly 3a is in an operation position, the air deflector 4a may adjust the height of the air outlet 10a. At this time, the height of the air outlet is the height between the edge of the main body frame forming the lowermost point of the air outlet duct and the outermost edge of the air deflector in the lifting direction of the air outlet assembly.

[0458] The air deflector 4a has a first position to allow the height h1 of the air outlet 10a to reach a minimum value, and the ratio range of the minimum height h1 of the air outlet 10a to the width of the first end 21a of the air outlet duct 2a is 1 / 3≤h1 / h2≤3 / 5, so that the rotation range of the air deflector is determined by the ratio range to improve the air output effect of the ceiling recessed fan.

[0459] The air deflector 4a may deflect the air output at the air outlet 10a. When the ceiling recessed fan is in a cooling mode, in order to achieve the waterfall refrigeration effect, the angle range of the included angle a between the plane where the air deflector 4a is located and the horizontal plane is - 10°≤a≤10°, and when a=0°, the plane where the air deflector 4a is located is parallel to the horizontal plane. At this time, the air output at the air outlet 10a may flow against the wall (against the ceiling) as much as possible under the definition of the air deflector 4a, and then a waterfall refrigeration effect is formed by the downward flow characteristic of cold air.

[0460] In some embodiments, when the ceiling recessed fan is in a cooling mode, the angle range of the included angle a is 10≥a>0, and when a>0°, the air deflector 4a tilts upward relative to the horizontal plane, also that is, the air deflector 4a is always in a state of tilting upwards relative to the horizontal plane, thereby increasing the attachment effect of the air output of the air outlet 10a against the wall and increasing the air supply distance and the refrigeration effect of the ceiling recessed fan.

[0461] The air outlet assembly has a closed position to close the air outlet 10a in cooperation with the main body frame 1a, and the air deflector 4a has a first edge 41a and a second edge 42a. When the air outlet assembly 3a is in the closed position, the first edge 41a is sealed with a corresponding position of the main body frame 1a, and the second edge 42a is sealed with a corresponding edge of the air outlet frame. By way of a corresponding seal between the first edge 41a and the main body frame 1a and a corresponding seal between the second edge 42a and the air outlet frame, when the air outlet assembly is in the closed position, the air deflector 4a can enclose a corresponding position of the air outlet 10a, thereby reducing impurities such as dust entering the interior of the ceiling recessed fan from the position of the air outlet 10a to affect the performance of the ceiling recessed fan.

[0462] When the air outlet assembly 3a is in the closed position, the air outlet frame and the air deflector 4a jointly cooperate with the main body frame 1a to form a seal. At this time, the air outlet assembly is attached to the main body frame, and the opening on the main body frame is completely covered by the air outlet assembly, so that the ceiling recessed fan has a favorable aesthetic effect.

[0463] The second edge 42a is provided with a first step structure, and the air outlet frame is provided with a second step structure fit with the first step structure. When the air outlet assembly 3a is in the closed position, the first step structure is sealingly fit with the second step structure. The first step structure and the second step structure not only make the sealing between the air deflector 4a and the air outlet frame reliable, but also allow that the structure of the air outlet assembly 3a is not be affected by a structural interference between the air deflector 4a and the air outlet assembly 3a during the rotation process of the air deflector 4a.

[0464] The first step structure is provided with a seal, and when the air outlet assembly 3a is in the closed position, the seal is arranged between the first step structure and the second step structure. Also that is, the seal moves together with the air deflector, and when the air deflector is sealed relative to the air outlet frame, the seal can enclose a slit between the air deflector and the air outlet frame, thereby enhancing the sealing effect between the air deflector and the air outlet frame.

[0465] The ceiling recessed fan also includes a rotating mechanism arranged on the air outlet frame, and the air deflector 4a is arranged on the rotating mechanism.

[0466] The rotating mechanism includes a rotary arm 5a, one end of which is hinged to the air outlet frame, and the other end of which is arranged on the air deflector 4a. In some embodiments, both ends of the air deflector 4a in the length direction are provided with a rotary arm 5a, thereby improving the synchronization of the overall movement of the air deflector 4a.

[0467] The rotating mechanism also includes a driving member arranged on the air outlet frame and directly or indirectly driving the rotary arm 5a to rotate. Wherein, one end of the rotary arm 5a is arranged on the driving member, and the air deflector 4a is arranged on the other end of the rotary arm 5a. When the rotary arm 5a rotates with the end arranged on the driving member, the air deflector 4a may move together with the end of the rotary arm 5a, so as to realize the rotation of the air deflector 4a, wherein the driving member is a stepper motor.

[0468] The ceiling recessed fan also includes a lifting mechanism arranged in the main body frame 1a, and the air outlet assembly 3a is arranged on the lifting mechanism. The air outlet assembly 3a may project from or retract into the main body frame 1a by means of the lifting mechanism, so that the air outlet assembly 3a may move freely between the operation position and the closed position.

[0469] The air outlet assembly 3a includes an air outlet frame, wherein an air outlet is formed between the air outlet frame and the main body frame, and the air outlet frame is lifted independently. In other embodiments not shown, the air outlet assembly 3a includes an air outlet frame and an air return panel, wherein an air outlet is formed between the air outlet frame and the main body frame, the air return panel is provided with an air return gate, and the air outlet frame and the air return panel are connected and lifted together.

[0470] The ceiling recessed fan is an air treatment device installed on the ceiling for indoor heat exchange. During its heat exchange process, heat exchange is prioritized in a high part of the room. During cooling, since cold air is heavy, it may flow from the high part of the room to the ground of the room to realize fast cooling in the room. However, during heating, since hot air is light, it may float high in the room to only improve the temperature in a high part of the room, which results in that the ceiling recessed fan mistakenly judges that the temperature in the room has reached a set temperature so as to affect the overall heating effect in the room. In the related art, it is generally to simply increase the relevant parameters of the fan (the diameter and rotation speed of the fan) so as to raise the air output volume, and utilize a greater air output volume or a greater air output velocity to blow hot air to the ground of the room as much as possible, so that such solution may result in that it is necessary to increase the overall dimension of the ceiling recessed fan or add to the cost. However, the applicant has found through studies on the air output airflow of the ceiling recessed fan and analysis of the simulation experiment data that, the technical solution of increasing the relevant parameters of the fan actually does more harm than good, which is not conducive to further development of the industry. Whereas, the parameters concerning the dimension of the air outlet and the dimension of the air duct inside the ceiling recessed fan, which are neglected and ignored in the art, are aspects to be improved that may effectively enhance a heating efficiency of the ceiling recessed fan in turn.

[0471] Therefore, in order to achieve a better heating comfort, hot air is first blown to the ground nearby, and then diffused outward along the ground, thereby improving the heat exchange efficiency of the ceiling recessed fan in a heating mode.

[0472] Referring to Figs. 8 to 19, according to a second embodiment of the present disclosure, a ceiling recessed fan with a heating mode is provided, which includes a main body frame 1a internally provided with an air outlet duct 2a having a first end 21a and a second end 22a provided along the airflow direction; an air outlet assembly 3a arranged in the main body frame 1a in a way so as to be able to be raised and lowered, and the air outlet assembly 3a has an operation position that descends to a predetermined height, wherein an air outlet 10a is formed between the air outlet assembly 3a and the main body frame 1a, and the air outlet 10a communicates with the second end 22a of the air outlet duct 2a. The ceiling recessed fan has a heating mode. When the ceiling recessed fan is in a heating mode and the air outlet assembly 3a is in an operation position, the ratio range of the height h1 of the air outlet 10a to the width h2 of the first end 21a of the air outlet duct 2a is 2 / 3≤h1 / h2≤4 / 5.

[0473] It is to be noted that, the main body frame 1a is a main load-bearing structure of the ceiling recessed fan. When the ceiling recessed fan is installed, the main body frame 1a is used to be mounted on the ceiling, and other structures are directly or indirectly mounted on the main body frame 1a and fixed to the ceiling through the main body frame 1a. The height h1 of the air outlet 10a refers to the height between the edge of the main body frame forming the lowermost point of the air outlet duct and the outermost edge of the air outlet assembly in the direction of a height difference between the air outlet assembly and the main body frame.

[0474] During the operation of the ceiling recessed fan, the air flows from the first end 21a to the second end 22a of the air outlet duct, and is finally expelled from the ceiling recessed fan through the air outlet 10a. When the ceiling recessed fan is designed, in order to achieve the balance between the air supply distance and the air outlet volume of the ceiling recessed fane, the designer determines the specific parameters of the ceiling recessed fan according to the ratio range of the height h1 of the air outlet to the width of the first end 21a of the air outlet duct 2a, so that the air output effect of the produced ceiling recessed fan achieves preset requirements.

[0475] Taking the experiment data of a 3 horse power air conditioner as an example, in this solution, h2 is a fixed value of 60mm, and the value of h1 is adjusted for simulation. The simulation results are as follows: h1h1 / h2Air volume (m 3< / h)Air supply distance350.69532.5m400.6710052m450.7511121.8m480.811121.1m540.911120.3m

[0476] From the results, when h1 / h2 is about 0.8, the air volume and hot air landing are both favorable, which is a desirable state (Figure 10). When h1 / h2 continues to increase and exceeds 0.9, the airflow can only flow downward rater than diffusing outwards, which is a poor effect (Figure 12). When h1 / h2 decreases to 0.75, the air volume does not change. However, as can be seen from the drawing, hot air begins to present an upward float tendency, so that it is impossible to land well (Figure 11). When h1 / h2 decreases to 0.67, the air volume begins to decrease, and although the air supply distance increases, hot air cannot reach the ground, so that the heating effect becomes worse (Figure 13). When the ratio of h1 / h2 is less than 0.6, hot air can be sent far away rather than blowing to the vicinity of the ground, which is a poor heating effect (Figure 14).

[0477] The air outlet assembly 3a is arranged in the main body frame 1a in a way so as to be able to be raised and lowered, and the air outlet assembly 3a has an operation position descending to a set height to form a height difference. When the air outlet assembly 3a is in an operation position, the ratio range of the height h1 of the air outlet 10a to the width h2 of the first end 21a of the air outlet duct 2a is 2 / 3≤ h1 / h2≤4 / 5. At this time, the height h1 of the air outlet 10a is the height between the edge of the main body frame forming the lowermost point of the air outlet duct and the outermost edge of the air outlet assembly in the lifting direction of the air outlet assembly 3a.

[0478] The air outlet assembly 3a includes an air deflector 4a and an air outlet frame, wherein the air outlet frame is arranged in the main body frame 1a; the air deflector 4a is rotatably arranged on the air outlet frame; and when the air outlet assembly 3a is in an operation position, the air deflector 4a may adjust the height of the air outlet 10a. At this time, the height of the air outlet is the height between the edge of the main body frame forming the lowermost point of the air outlet duct and the outermost edge of the air deflector in the lifting direction of the air outlet assembly.

[0479] The air deflector 4a has a first position to allow the height h1 of the air outlet 10a to reach a minimum value, and the ratio range of the minimum height h1 of the air outlet 10a to the width of the first end 21a of the air outlet duct 2a is 2 / 3≤h1 / h2≤4 / 5, so that the dimensions and rotation range of the air deflector is determined by the ratio range to improve the air output effect of the ceiling recessed fan.

[0480] Taking the experiment data of a 3 horse power air conditioner as an example, in this solution, h2 is a fixed value of 60. In the case where there is present with the air deflector 4a, the value of h1 is directly adjusted by the opening angle of the air deflector without descending the air outlet assembly. During simulation, the simulation results are as follows: h1h1 / h2Air volume (m 3< / h)Air supply distance350.69483m400.6710552.5m450.7511121.8m480.811120.7m540.911120.3m

[0481] From the experiment results, when h1 / h2 is about 0.8, the air volume and the air supply distance are both favorable, which is a desirable state (Figure 15). When h1 / h2 continues to increase and exceeds 0.9, the airflow can only flow downward rater than diffusing outwards, which is a poor effect (Figure 17). When h1 / h2 decreases to 0.75, the air supply distance increases, but hot air begins to present an upward float tendency, so that it is impossible to land well (Figure 16). When h1 / h2 decreases to 0.67, the air volume is further reduced, and although the air supply distance increases, hot air cannot reach the ground, so that the heating effect becomes worse (Figure 18). When the ratio of h1 / h2 is less than 0.6, hot air can be sent far away rather than blowing to the vicinity of the ground, which is a poor heating effect (Figure 19).

[0482] When there is not present with the air deflector 4a and the air outlet is formed by descending the air outlet assembly 3a to perform heating, the airflow direction of the air outlet of the ceiling recessed fan cannot be adjusted. In order to enable hot air to reach the ground smoothly, the descending dimension of the air outlet assembly 3a is required to be far more than 54mm so as to ensure the air output effect of the ceiling recessed fan. The air outlet needs to descend more, which results in that the dimension of the lifting mechanism is increased, far more than an acceptable descending dimension of the air outlet assembly. Therefore, simulation is performed only with the presence of the structure of the air deflector 4a.

[0483] The air deflector 4a may deflect the air output at the air outlet 10a. When the ceiling recessed fan is in a heating mode, in order to achieve a rapid heating effect, the angle range of the included angle a between the air deflector 4a and the horizontal plane is 45° to 75°. At this time, the air output at the air outlet 10a may be blown out in the vertical direction under the definition of the air deflector 4a, so as to achieve a rapid heating effect.

[0484] The air outlet assembly has a closed position to close the air outlet 10a in cooperation with the main body frame 1a, and the air deflector 4a has a first edge 41a and a second edge 42a. When the air outlet assembly 3a is in the closed position, the first edge 41a is sealed with a corresponding position of the main body frame 1a, and the second edge 42a is sealed with a corresponding edge of the air outlet frame. By way of a corresponding seal between the first edge 41a and the main body frame 1a and a corresponding seal between the second edge 42a and the air outlet assembly, when the air outlet assembly is in the closed position, the air deflector 4a can enclose a corresponding position of the air outlet 10a, thereby avoiding impurities such as dust entering the interior of the ceiling recessed fan from the position of the air outlet 10a to affect the performance of the ceiling recessed fan.

[0485] When the air outlet assembly 3a is in the closed position, the air outlet frame and the air deflector 4a jointly cooperate with the main body frame 1a to form a seal. At this time, the air outlet assembly 3a is attached to the main body frame 1a, and the opening on the main body frame 1a is completely covered by the air outlet assembly 3a, so that the ceiling recessed fan has a favorable aesthetic effect.

[0486] The second edge 42a is provided with a first step structure, and the air outlet frame is provided with a second step structure fit with the first step structure. When the air outlet assembly 3a is in the closed position, the first step structure is sealingly fit with the second step structure. The first step structure and the second step structure not only make the sealing between the air deflector 4a and the air outlet frame reliable, but also allow that the structure of the air outlet assembly 3a is not be affected by a structural interference between the air deflector 4a and the air outlet assembly 3a during the rotation process of the air deflector 4a.

[0487] The first step structure is provided with a seal, and when the air outlet assembly 3a is in the closed position, the seal is arranged between the first step structure and the second step structure. Also that is, the seal moves together with the air deflector, and when the air deflector is sealed relative to the air outlet frame, the seal can enclose a slit between the air deflector and the air outlet frame, thereby enhancing the sealing effect between the air deflector and the air outlet frame.

[0488] The ceiling recessed fan also includes a rotating mechanism arranged on the air outlet assembly 3a, and the air deflector 4a is arranged on the rotating mechanism.

[0489] The rotating mechanism includes a rotary arm 5a, one end of which is hinged to the air outlet assembly 3a, and the other end of which is arranged on the air deflector 4a. In some embodiments, both ends of the air deflector 4a in the length direction are provided with a rotary arm 5a, thereby ensuring the synchronization of the overall movement of the air deflector 4a.

[0490] The rotating mechanism also includes a driving member arranged on the air outlet assembly 3a and directly or indirectly driving the rotary arm 5a to rotate. Wherein, one end of the rotary arm 5a is arranged on the driving member, and the air deflector 4a is arranged on the other end of the rotary arm 5a. When the rotary arm 5a rotates with the end arranged on the driving member, the air deflector 4a may move together with the end of the rotary arm 5a, so as to realize the rotation of the air deflector 4a, wherein the driving member is a stepper motor.

[0491] The ceiling recessed fan also includes a lifting mechanism arranged in the main body frame 1a, and the air outlet assembly 3a is arranged on the lifting mechanism. The air outlet assembly 3a may project from or retract into the main body frame 1a by means of the lifting mechanism, so that the air outlet assembly 3a may move freely between the operation position and the closed position.

[0492] The air outlet assembly 3a includes an air outlet frame, wherein an air outlet is formed between the air outlet frame and the main body frame, and the air outlet frame is lifted independently. In other embodiments not shown, the air outlet assembly 3a includes an air outlet frame and an air return panel, wherein an air outlet is formed between the air outlet frame and the main body frame, the air return panel is provided with an air return gate, and the air outlet frame and the air return panel are connected and lifted together.

[0493] The following relationship is present between the air supply distance and the air outlet volume of the ceiling recessed fan in the related art: when the air supply distance is long, the air outlet volume thereof is attenuated more, and when the air supply distance is short, the air outlet volume is attenuated less. In view of the problem that the air outlet volume is attenuated more when the air supply distance is long present in the ceiling recessed fan that has been found by the inventors, in the related art, it is generally to simply increase the relevant parameters of the fan (the diameter and rotation speed of the fan) so as to raise the air outlet volume, which results in that it is necessary to increase the overall dimension of the ceiling recessed fan or add to the cost. However, the applicant has found through studies on the air output airflow of the ceiling recessed fan and analysis of the simulation experiment data that, the technical solution of increasing the relevant parameters of the fan actually does more harm than good, which is not conducive to further development of the industry. Whereas, the relationship concerning the height of the air outlet and the target air output volume, which is neglected and ignored in the art, is an aspect to be improved that can effectively enhance a matching degree between the air supply distance and the air volume of the ceiling recessed fan in turn.

[0494] Therefore, in order to ensure that the air supply distance and the air output volume of the ceiling recessed fan reach a better level as much as possible, as shown in a third embodiment of the present disclosure in Figure 20, a ceiling recessed fan is provided, which includes a main body frame 1a and an air outlet assembly 3a. The air outlet assembly 3a is arranged in the main body frame 1a in a way so as to be able to be raised and lowered, and the air outlet assembly 3a has an operation position descending to a set height, wherein an air outlet 10a is formed between the air outlet assembly 3a and the main body frame 1a. When the height h1 of the air outlet 10a is in the range of 20mm≤h1≤36mm, the air output volume of the ceiling recessed fan is greater than or equal to 75% of a rated air output volume of the ceiling recessed fan.

[0495] In some embodiments, the height h1 of the air outlet 10a is in the range of 20mm≤h1≤36mm.

[0496] It is to be noted that, the main body frame 1a is a main load-bearing structure of the ceiling recessed fan. When the ceiling recessed fan is installed, the main body frame 1a is used to be mounted on the ceiling, and other structures are directly or indirectly mounted on the main body frame 1a and fixed to the ceiling through the main body frame 1a. The height h1 of the air outlet 10a refers to the height between the edge of the main body frame 1a forming the lowermost point of the air outlet duct and the outermost edge of the air outlet module 3a in the lifting direction of the air outlet assembly 3a. When the structure of the air outlet assembly 3a for forming the air outlet 10a with the main body frame 1a is a horizontal structure, the height h1 of the air outlet 10a is also expressed as the descending height of the air outlet assembly 3a. The rated air output volume of the ceiling recessed fan refers to the air volume of the highest stage in an air supply mode under set conditions (set environments such as dry bulb temperature and wet bulb temperature).

[0497] Taking the experiment data of a 3 horse power air conditioner as an example, the value of h1 is adjusted for simulation. The simulation results are as follows: h1Air volume (m 3< / h)Air supply distance156673.3m208343.5m2810053.5m3611122m4511121.2m

[0498] From the simulation results, when h1 is 28mm, although the air volume does not reach a maximum value, the air supply distance reaches a maximum value. When h1 increases to 36mm, the air supply distance begins to decrease. When h1 continues to increase to 45mm, the air volume remains at the maximum value, but the air supply distance is apparently shortened. When h1 is reduced to 20mm, the air supply distance remains at the maximum value, but the air volume begins to decrease. When h1 continues to decrease to 15mm, the air volume continues to decrease, and at the same time, the air supply distance also begins to decrease. Also that is, when h1 is too large, although the air volume can be maintained, the air supply distance may be seriously reduced, which results in a poor air output effect of the ceiling recessed fan. When h1 is too small, the air outlet at this time cannot meet the requirements of the air output volume of the ceiling recessed fan. When h1 is in the range of 20mm to 36mm, the ceiling recessed fan reasonably matches the air volume and the air supply distance, which finally improves the air output effect of the ceiling recessed fan. When the ceiling recessed fan is designed, the target air volume of the ceiling recessed fan is set, and then the height of the air outlet 10a is designed according to the target air volume, so as to select a better height of the air outlet 10a. In this way, it is possible to set a descending stroke of the air outlet assembly 3a and a driving mechanism for driving the air outlet assembly 3a to ascend and descend, thereby effectively improving the design efficiency and solving the design and manufacturing cost.

[0499] Taking the experiment data of a 3 horse power air conditioner as an example, the value of h1 is adjusted for simulation. The simulation results are as follows: h1Air velocity (m / s)1516.12012.0288.6366.7455.4

[0500] From the simulation results, when h1 is 28mm, the air velocity reaches a comfortable value of 8.6m / s. When h1 increases to 36mm, the air velocity begins to decrease, which will reduce the indoor heat exchange effect. When h1 continues to increase to 45mm, the air velocity continues to decrease, so that the air velocity at the air outlet cannot meet the preset requirements. When h1 decreases to 20mm, the air velocity begins to increase, which might lead to a poor experience of air output skin blow at the air outlet. When h1 continues to decrease to 15mm, the air velocity continues to increase and exceeds a maximum limit, which leads to direct blow. Also that is, when h1 is too large, the air velocity cannot make the airflow blow into indoor effectively. When h1 is too small, the air velocity is so large as to cause skin blow. Only when h1 is in the range of 20mm to 36mm, the ceiling recessed fan reasonably matches the air velocity and the air supply distance, which finally improves the air output effect of the ceiling recessed fan.

[0501] The ceiling recessed fan also includes a fan, and there is a relationship between the rotation speed of the fan and the height h1 of the air outlet 10a. Also that is, at this time, the fan is a variable frequency fan, and the rotation speed of the fan can be adjusted as necessary. In order to ensure that the ceiling recessed fan reaches the target air output volume, the height h1 of the air outlet 10a is mated with the rotation speed of the fan, which effectively reduces the energy consumption and structural complexity of the ceiling recessed fan.

[0502] The air outlet assembly 3a includes a rotatable air deflector 4a, and the air deflector 4a and the main body frame 1a form an air outlet 10a. The height h1 of the air outlet 10a can be adjusted during the rotation process of the air deflector 4a. At this time, the height h1 of the air outlet 10a refers to the height between the edge of the main body frame 1a forming the lowermost point of the air outlet duct and the outermost edge of the air deflector 4a in the lifting direction of the air outlet assembly 3a.

[0503] When the ceiling recessed fan is in a cooling mode, the angle range of the included angle a between the plane where the air deflector 4a is located and the horizontal plane is -10°≤a≤10°, and when a=0°, the plane where the air deflector 4a is located is parallel to the horizontal plane.

[0504] Taking the experiment data of a 3 horse power air conditioner as an example, simulation is performed by changing the value of a. With the upward tilting of the plane where the air deflector 4a is located relative to the mounting planar face of the main body frame 1a (upward reflex of the air deflector) as a negative angle, and the downward tilting of the plane where the air deflector 4a is located relative to the mounting planar face of the main body frame 1a (downward swing of the air deflector) as a positive angle, the simulation results are as follows: Angle aAir volume (m 3< / h)Air supply distance-15°8383.1m-10°9953.7m0°10053.5m10°11122.2m15°11121.4m

[0505] From the simulation results, when a is 0°, although the air volume does not reach a maximum value, the air supply distance substantially reaches a maximum value. When a is increased to 0°, the air volume reaches a maximum value, but the air supply distance begins to decrease. When h1 continues to increase to 45mm, the air volume remains at the maximum value, but the air supply distance is apparently reduced, which cannot meet the waterfall refrigeration effect by horizontal air supply. When h1 decreases to 20, although the air supply distance does not change, the air volume begins to decrease. When h1 continues to decrease to 15mm, the air volume continues to decrease, and the air supply distance also begins to decrease at the same time. Also that is, when h1 is between 20mm and 36mm, the air supply distance and the air volume of the ceiling recessed fan can be reliably balanced. When h1 is too large, the air volume will not increase, but the air supply distance may be seriously attenuated, which affects the air output effect of the ceiling recessed fan. When h1 is too small, the air outlet 10a may cover the air outlet of the ceiling recessed fan to a certain extent, and the air supply distance may also be relatively reduced at the same time.

[0506] The ceiling recessed fan also includes a rotating mechanism arranged on the air outlet assembly 3a, and the air deflector 4a is arranged on the rotating mechanism.

[0507] The rotating mechanism includes a rotary arm, one end of which is hinged to the air outlet assembly 3a, and the other end of which is arranged on the air deflector 4a. In some embodiments, both ends of the air deflector 4a in the length direction are provided with a rotary arm, thereby ensuring the synchronization of the overall movement of the air deflector 4a.

[0508] The rotating mechanism also includes a driving member arranged on the air outlet assembly 3a and drivingly connected with the rotary arm. Wherein, one end of the rotary arm is arranged on the driving member, and the air deflector 4a is arranged on the other end of the rotary arm. When the rotary arm rotates with the end arranged on the driving member, the air deflector 4a may move together with the end of the rotary arm, so as to realize the rotation of the air deflector 4a, wherein the driving member is a stepper motor.

[0509] The ceiling recessed fan also includes a lifting mechanism arranged in the main body frame 1a, and the air outlet assembly 3a is arranged on the lifting mechanism. The air outlet assembly 3a may project from or retract into the main body frame 1a by means of the lifting mechanism, so that the air outlet assembly 3a may move freely between the operation position and the closed position.

[0510] The air outlet assembly 3a includes an air outlet frame, wherein an air outlet 10a is formed between the air outlet frame and the main body frame 1a, and the air outlet frame is lifted independently. In other embodiments not shown, the air outlet assembly 3a includes an air outlet frame and an air return panel, wherein an air outlet 10a is formed between the air outlet frame and the main body frame 1a, the air return panel is provided with an air return gate, and the air outlet frame and the air return panel are connected and lifted together.

[0511] The following relationship is present between the air supply distance and the air outlet volume of the ceiling recessed fan in the related art: when the air supply distance is long, the air outlet volume thereof is attenuated more, and when the air supply distance is short, the air outlet volume is attenuated less. In view of the problem that the air outlet volume is attenuated more when the air supply distance is long present in the ceiling recessed fan that has been found by the inventors, in the related art, it is generally to simply increase the relevant parameters of the fan (the diameter and rotation speed of the fan) so as to raise the air outlet volume, which results in that it is necessary to increase the overall dimension of the ceiling recessed fan or add to the cost. However, the applicant has found through studies on the air output airflow of the ceiling recessed fan and analysis of the simulation experiment data that, the technical solution of increasing the relevant parameters of the fan actually does more harm than good, which is not conducive to further development of the industry. Whereas, the parameters concerning the dimension of the air deflector, which are neglected and ignored in the art, are aspects to be improved that can effectively enhance a matching degree between the air supply distance and the air volume of the ceiling recessed fan in turn.

[0512] Therefore, according to a fourth embodiment shown in Figs. 21 to 24, a ceiling recessed fan is disclosed, which includes: a main body frame 1a and an air outlet assembly 3a. The main body frame 1a is formed with an air outlet duct, and the main body frame 1a includes a side frame 11a with a first edge 111 forming the lowermost point of the air outlet duct. The air outlet assembly 3a is arranged in the main body frame 1a in a way so as to be able to be raised and lowered, and the air outlet assembly 3a descends so that a first air outlet 10a is formed between the air outlet assembly 3a and the main body frame 1a. The relationship between the width D of the outer edge of the air outlet assembly 3a beyond the first edge 41a and the height h1 of the air outlet is 2 / 5≤D / h1≤9 / 5. If the value D is too small, it is impossible to deflect the airflow required to be expelled from the first air outlet 10a. Whereas, if the value D is too large, it is possible to affect the aesthetic feeling of the ceiling recessed fan, and since the dimension of the air outlet assembly 3a is too large, it is likely to deform the air outlet assembly and cause damage to the ceiling recessed fan.

[0513] Taking the experiment data of a 3 horse power air conditioner as an example, in this solution, h1 is 30mm, and the value of D is adjusted for simulation. The simulation results are as follows: DD / h1Air volume (m 3< / h)Air supply distance100.3311102.1m120.411092.8m150.511092. 8m200.6711092.9m250.8311082.9m30111083.1m351.1711073.1m401.3311073.2m451.511073.2m501.6711063.3m551.8311003.3m60210743.3m

[0514] From the data, when the ratio of D / h1 is 0.33, the air supply distance is short, which does not produce an air deflecting effect and cannot achieve the comfort during cooling (as shown in Figure 3). When D / h1 is in the range of 0.4 to 1.8, the air supply distance is apparently increased with an obvious effect, and the air volume is substantially not attenuated (as shown in Figure 4, at the same time, D / h1 is 0.4). During the process of gradually increasing the ratio, it can be seen that the air supply distance continues to increase slowly. However, when the D / h1 exceeds 1.8, the air volume will be attenuated due to the lengthening of the air duct, which will also affect the refrigeration effect at this time.

[0515] In the related art, the air output range of the ceiling recessed fan includes a horizontal flow portion and a tiltingly downward flow portion. The horizontal flow portion can determine the air supply distance of the ceiling recessed fan, while the tiltingly downward flow portion can rapidly allow the airflow to flow into indoor. When the air supply distance of the ceiling recessed fan needs to be increased, it is necessary to reduce the air volume of the tiltingly downward flow portion so as to increase the air volume of the horizontal flow portion. When the air volume of the horizontal flow portion increases, there is a farther air supply distance that can be achieved during air output. Therefore, In order to increase the air volume of the horizontal flow portion, the tiltingly downward component of the air outlet is adjusted to be a horizontal direction by increasing the dimension of the air outlet assembly 3a, thereby increasing the air volume flowing in the horizontal direction and finally increasing the air supply distance.

[0516] It is to be noted that, the main body frame 1a is a main load-bearing structure of the ceiling recessed fan. When the ceiling recessed fan is installed, the main body frame 1a is used to be mounted on the ceiling, and other structures are directly or indirectly mounted on the main body frame 1a and fixed to the ceiling through the main body frame 1a. The side frame 11a refers to a lapped joint portion between the main body frame 1a and the ceiling when the ceiling recessed fan is installed on the ceiling and other structures. The height h1 of the air outlet 10a refers to the height between the edge of the main body frame 1a forming the lowermost point of the air outlet duct and the outermost edge of the air outlet assembly 3a in the direction of a height difference between the air outlet assembly 3a and the main body frame 1a. When the air deflector 4a forms a projection on the main body frame 1a, the included angle between the air deflector 4a and the horizontal plane is in the range of -10° to 10°.

[0517] When the air outlet assembly 3a descends so that a first air outlet 10a is formed between the air outlet assembly 3a and the main body frame 1a, a gap which is formed between the air outlet assembly 3a and the main body frame 1a, forms an air supply duct 14a. One end of the air supply duct 14a communicates with the air outlet duct to allow that the other end of the air supply duct 14a forms a first air outlet 10a. The airflow in the air outlet duct is blown out by the first air outlet 10a after air deflecting by the air supply duct 14a, and the vertically downward airflow in the air outlet duct is deflected by the air supply duct 14a to output air away from the ceiling recessed fan substantially along a horizontal direction, or even in a direction of upwardly tilting relative to a horizontal plane, so as to realize horizontal air output to the ceiling recessed fan.

[0518] When the air outlet assembly 3a descends so that a first air outlet 10a is formed between the air outlet assembly 3a and the main body frame 1a, an air supply duct 14a is formed between the air outlet assembly 3a and the side frame 11a. The projection of the air outlet assembly 3a at least partially coincides with the projection of the side frame 11a on the mounting planar face of the main body frame 1a. When the projection of the air outlet assembly 3a coincides with the projection of the side frame 11a, the air outlet assembly is substantively extended compared with the related art, so that it is possible to allow a favorable horizontal blow effect of the ceiling recessed fan and an increased air supply distance. When the ceiling recessed fan opens the first air outlet 12, the air outlet assembly 3a gradually goes away from the main body frame 1a to form an air supply duct 14a. At this time, a corresponding portion of the air outlet assembly 3a forms a lower side surface of the air supply duct 14a. When the airflow flows through the air supply duct 14a, under the air deflecting effect of a lower side surface of the air supply duct, the airflow flows along a horizontal direction or even blows out along an upwardly tilting direction, which increases the air supply distance of the ceiling recessed fan, thereby realizing a horizontal air output effect.

[0519] As another embodiment, the projection of the air outlet assembly 3a completely coincides with the projection of the side frame 11a. In this case, compared with the case where the projection of the air outlet assembly 3a partially coincides with the projection of the side frame 11a, the air outlet assembly can be further extended, so as to allow a horizontal blow effect of the ceiling recessed fan and a further increased air supply distance. At the same time, when the ceiling recessed fan is in a shutdown state, the air outlet assembly 3a is attached to the main body frame 1a, and a corresponding portion of the air outlet assembly 3a is attached to the side frame 11a, so that a person can only see the air outlet assembly 3a instead of the main body frame 1a when observing the ceiling recessed fan from the ground, which effectively increases the aesthetic feeling of the ceiling recessed fan.

[0520] As another embodiment, the projection of the air outlet assembly 3a exceeds the projection of the side frame 11a. In this case, compared with the case where the projection of the air outlet assembly 3a completely coincides with the projection of the side frame 11a, the air outlet assembly can be further extended, thereby further increasing a horizontal blow effect and an air supply distance of the ceiling recessed fan.

[0521] In some embodiments, the projection of the air outlet assembly 3a exceeds the projection of the main body frame 1a, so that the air outlet assembly 3a effectively increases the air deflecting dimension relative to the related art, so as to increase the air supply distance of the ceiling recessed fan.

[0522] The air outlet assembly 3a is provided with a second air outlet 20a, and the second air outlet 20a is provided with an air deflector 4a which is rotatably arranged at the second air outlet 20a and capable of closing or opening the second air outlet 20a. When the second air outlet 20a needs to be opened, the air deflector 4a rotates gradually, so that the second air outlet 20a communicates with the air outlet duct to allow that the airflow in the air outlet duct is blown out by the second air outlet 20a, and the air deflector 4a adjusts its tilting angle according to actual needs to adjust the air output direction and / or the air output volume of the second air outlet 20a. When the second air outlet 20a needs to be closed, the air deflector 4a returns to the state of sealing fit with the air outlet assembly 3a so as to close the second air outlet 20a. At this time, the airflow in the air outlet duct can only be blown out from the first air outlet 10a under the joint deflection effect of the air outlet assembly 3a and the air deflector 4a.

[0523] The edge of the air deflector 4a is provided with a first step structure, and the edge of the second air outlet 20a is provided with a second step structure, so that the first step structure and the second step structure are fit to form a step sealing structure. With a sealing structure, when the second air outlet 20a is closed, it is ensured that the airflow will not flow out through a slit between the air deflector 4a and the second air outlet 20a (in order to prevent locking due to a manufacturing tolerance, it is necessary to design an avoidance gap between the air deflector 4a and the second air outlet 20a) so as to reduce the air output effect. Wherein, the air deflector 4a has a plurality of edges connected sequentially, the edge of the second air outlet 20a is an annular edge matched with the air deflector 4a, and a step sealing structure is provided between each edge of the air deflector 4a and a portion of a corresponding annular edge to ensure the sealing effect of the air deflector 4a on the second air outlet 20a.

[0524] The ceiling recessed fan also includes a lifting mechanism. The lifting mechanism is arranged in the main body frame 1a, and the air outlet assembly 3a is arranged on the lifting mechanism. The air outlet assembly 3a may project from or retract into the main body frame 1a by means of the lifting mechanism, so that the air outlet assembly 3a may move freely between the operation position and the closed position.

[0525] The air outlet assembly 3a includes an air outlet frame. A first air outlet 10a is formed between the air outlet frame and the main body frame, and the air outlet frame is lifted independently. In other embodiments not shown, the air outlet assembly 3a includes an air outlet frame and an air return panel, wherein a first air outlet 10a is formed between the air outlet frame and the main body frame 1a, the air return panel is provided with an air return gate, and the air outlet frame and the air return panel are connected and lifted together.

[0526] Wall attachment effect (also referred to as Coanda effect) refers to a flow change tendency of fluid (water flow or air flow) from an initial flow direction to flowing along with a protruding object surface. When there is surface friction between the fluid and the object surface through which the fluid flows (or fluid viscosity, as long as the curvature is not large), the fluid will flow along the object surface. Moreover, when the ceiling recessed fan is in a cooling mode, the air deflector at the air outlet is generally set horizontally to increase the air output distance of the ceiling recessed fan, but in fact, the air output of the ceiling recessed fan will flow along a direction where the air deflector goes away from the ceiling under the wall attachment effect, which finally causes that the actual air output effect of the ceiling recessed fan becomes worse. However, in the related art, in order to ensure the air supply distance of the ceiling recessed fan, it is generally to simply use a method of increasing the relevant parameters of the fan (the diameter and rotation speed of the fan) so as to raise the air output volume, which results in that it is necessary to increase the overall dimension of the ceiling recessed fan or add to the cost. However, the applicant has found through studies on the air output airflow of the ceiling recessed fan and analysis of the simulation experiment data that, the technical solution of increasing the relevant parameters of the fan actually does more harm than good, which is not conducive to further development of the industry. Whereas, the parameters concerning the tilting angle of the air deflector, which are neglected and ignored in the art, are aspects to be improved that can effectively enhance an air supply distance of the ceiling recessed fan in turn.

[0527] Therefore, according to a fifth embodiment of the present disclosure, a ceiling recessed fan as shown in Figs. 25 to 30 is provided, which includes: a main body frame 1a, an air outlet assembly 3a and a first air deflector 4a. The air outlet assembly 3a is arranged in the main body frame 1a. When the ceiling recessed fan is in a cooling mode, a height difference between the air outlet assembly 3a and the main body frame 1a is formed, and an air outlet 10a is formed between the air outlet assembly 3a and the main body frame 1a. The first air deflector 4a is arranged at a swinging mechanism, and the first air deflector is swingably arranged at the air outlet. The angle c between the plane of the first air deflector 4a and the mounting planar face of the main body frame 1a is in the range of -10°≤c≤10°, and when the angle c is 0°, the plane of the first air deflector 4a is parallel to the mounting planar face. The air outlet assembly 3a has a first descending height h, and the first descending height h is in the range of 20mm≤h≤36mm when the ceiling recessed fan is in a cooling mode. Even if the first air deflector 4a tilts upward at a certain angle to ensure that the air output of the ceiling recessed fan flows against the ceiling as much as possible, the horizontal air supply distance of the ceiling recessed fan in a cooling mode is ensured, and the waterfall refrigeration effect is realized at a maximum efficiency. Wherein, the descending stroke of the air outlet assembly 3a is greater than 36 mm.

[0528] Taking the experiment data of a 3 horse power air conditioner as an example, simulation is performed by adjusting the value of the angle c. Wherein, with the upward tilting of the plane where the first air deflector 4a is located relative to the mounting planar face of the main body frame 1a (upward reflex of the first air deflector) as a negative angle, and the downward tilting of the plane where the first air deflector 4a is located relative to the mounting planar face of the main body frame 1a (downward swing of the first air deflector) as a positive angle, the simulation results are as follows: Angle cAir volume (m 3< / h)Air supply distance-15° (Figure 30)8383.1m-10° (Figure 26)9953.7m0° (Figure 27)10053.5m10° (Figure 28)11122.2m15° (Figure 29)11121.4m

[0529] From the experiment results, when the angle c is -10°, although the air volume does not reach a maximum value, there is a small difference from the maximum air volume, and its air supply distance reaches a maximum value. When the angle c is reduced to -15°, the air volume and the air supply distance both begin to decrease, and at this time, the air volume is attenuated to the extent where the air output requirements of the ceiling recessed fan cannot be satisfied. When the angle c increases to 0°, the attenuation of the air volume begins to decrease, but its air supply distance also begins to decrease. When the angle c continues to increase to 10°, the air volume reaches a maximum value, but the air supply distance is seriously attenuated, so that the limit where the air output requirements of the ceiling recessed fan cannot be satisfied is almost reached. When the angle c continues to increase to 15°, the air volume reaches a maximum value, but the air supply distance has been attenuated from 3.7m to 1.4m, and the horizontal air output of the ceiling recessed fan cannot be realized at this time. Also that is, when the ceiling recessed fan needs a large air output volume, the angle c with a large value (for example, when the angle C is 0° to 10°) is used, and it is also possible to raise the air output volume without being affected by the first air deflector 4a on the premise of ensuring that the first air deflector realizes all the air output distances of the ceiling recessed fan. When the ceiling recessed fan needs a small air output volume, the angle c with a small value (for example, when the angle C is -10° to 0°) is used, and at this time, the first air deflector 4a is upwardly tilted as much as possible to deflect the air output of the ceiling recessed fan to the ceiling to a maximum extent, so that the air output of the ceiling recessed fan flows against the ceiling as much as possible, thereby ensuring the waterfall refrigeration effect of the horizontal air output of the ceiling recessed fan.

[0530] It is to be noted that, the main body frame 1a is a main load-bearing structure of the ceiling recessed fan. When the ceiling recessed fan is installed, the main body frame 1a is used to be mounted on the ceiling, and other structures are directly or indirectly mounted on the main body frame 1a and fixed to the ceiling through the main body frame 1a.

[0531] The ceiling recessed fan also includes a fan, wherein the rotation speed of the fan is adjustable. According to the rotation speed of the fan, the air output volume of the ceiling recessed fan is determined. When the rotation speed of the fan is large, it is indicated that the air output volume of the ceiling recessed fan is large at this time. On the contrary, when the rotation speed of the fan is small, it is indicated that the air output volume of the ceiling recessed fan is small at this time.

[0532] When the angle c is in the range of -10°≤c<0°, the plane of the first air deflector 4a tilts upward relative to the mounting planar face, and the first descending height h is in the range of 20mm≤h≤28mm. Alternatively, when the angle c is in the range of 0°≤c<10°, the first descending height h is in the range of 20mm≤h≤36mm.

[0533] Taking the experiment data of a 3 horse power air conditioner as an example, simulation is performed by adjusting the value of the first descending height h. Wherein, with the upward tilting of the plane where the first air deflector 4a is located relative to the mounting planar face of the main body frame 1a (upward reflex of the first air deflector) as a negative angle, and the downward tilting of the plane where the first air deflector 4a is located relative to the mounting planar face of the main body frame 1a (downward swing of the first air deflector) as a positive angle, the simulation results are as follows: Descending height h (mm)Angle cAir volume (m 3< / h)Air supply distance20-10°7533.3m0°8343.5m10°9242.8m28-10°9953.7m0°10053.5m10°11122.2m36-10°11002.4m0°11122m10°11121.4m

[0534] From the experiment results, taking the angle c of -10° as an example, when h reaches 28mm, although the air volume does not reach a maximum value, there is a small difference from the maximum air volume, and its air supply distance reaches a maximum value. When h increases to 36mm, at this time, the air volume substantially reaches a maximum value, but the air supply distance is seriously attenuated, which cannot satisfy the air output requirements of the ceiling recessed fan. When h is reduced to 20mm, the air volume and the air supply distance both begin to decrease, which results in that the ceiling recessed fan cannot achieve a better efficiency. Taking the angle c of 10° as an example, when h reaches 28mm, the air volume and the air supply distance both reach a maximum value. When h increases to 36mm, the air volume still remains at a maximum value, but the air supply distance is seriously attenuated from 3.5m to 1.4m, which cannot satisfy the air output requirements of the ceiling recessed fan. When h is reduced to 20mm, although the air supply distance is relatively large, its air volume is seriously attenuated, and the air output effect of the ceiling recessed fan is still less favorable than the air output effect when h reaches 28 mm. Also that is, when the air outlet assembly 3a descends to 20mm to 28mm, it is possible to improve the air output effect of the ceiling recessed fan.

[0535] The air outlet assembly 3a is arranged in the main body frame 1a in a way so as to be able to be raised and lowered, and the air outlet assembly 3a has an operation position descending to a set height to form a height difference. After the ceiling recessed fan begins to work, the air outlet assembly 3a descends downward relative to the main body frame 1a, and when the air outlet assembly 3a reaches a set height, an air outlet 10a is formed, thereby ensuring that the ceiling recessed fan can perform normal heat exchange operation.

[0536] The mounting planar face of the main body frame 1a is parallel to the horizontal plane. Also that is, the main body frame 1a is mounted on a horizontal plane such as a ceiling.

[0537] The first air deflector 4a is provided with an extension plate, and when the air outlet assembly is in an operation position, the extension plate projects out of the first air deflector 4a. In order to further increase the air deflecting effect of the first air deflector 4a on the air output of the ceiling recessed fan, the effective air deflecting dimension of the first air deflector 4a is increased by using the extension plate, thereby increasing the air deflecting effect of the first air deflector 4a.

[0538] The ceiling recessed fan also includes an air deflecting structure arranged in the main body frame 1a, and capable of deflecting the air output of the air outlet when the ceiling recessed fan is in a cooling mode. With the air deflecting structure arranged in the main body frame 1a, the air output of the ceiling recessed fan is further allowed to flow against the ceiling, thereby increasing the air supply distance of the ceiling recessed fan in a cooling mode so as to increase the waterfall refrigeration effect.

[0539] As one embodiment, the main body frame 1a includes a side frame 11a, at least part of the air output of the air outlet passes through the side frame 11a, and the air deflecting structure includes a second air deflector 6a swingably arranged on the side frame 11a. The second air deflector 6a swings to adjust the flow direction of the air flow flowing through the side frame 11a (that is, an upper layer portion of the airflow), and adjust the flow direction of the lower layer airflow in the airflow by the first air deflector 4a, so as to jointly implement adjusting the air output direction of the ceiling recessed fan, thereby effectively improving the air output efficiency of the ceiling recessed fan.

[0540] As another embodiment, the main body frame 1a includes a side frame 11a, at least part of the air output of the air outlet passes through the side frame 11a, and an air deflecting channel 7a formed on the side frame 11a constitutes an air deflecting structure. By directly machining and moulding the air deflecting channel 7a on the side frame 11a, the airflow passing through the side frame 11a (that is, an upper layer portion of the airflow) is deflected by the air deflecting channel 7a, so as to limit a flow direction of this portion of the airflow, and jointly cooperate with the first air deflector 4a to overcome the wall attachment effect of the airflow.

[0541] The air outlet assembly includes an air outlet frame, wherein an air outlet is formed between the air outlet frame and the main body frame, and the air outlet frame is lifted independently. In other embodiments not shown, the air outlet assembly 3a includes an air outlet frame and an air return panel, wherein an air outlet is formed between the air outlet frame and the main body frame, the air return panel is provided with an air return gate, and the air outlet frame and the air return panel are connected and lifted together.

[0542] Wall attachment effect (also referred to as Coanda effect) refers to a flow change tendency of fluid (water flow or air flow) from an initial flow direction to flowing along with a protruding object surface. When there is surface friction between the fluid and the object surface through which the fluid flows (or fluid viscosity, as long as the curvature is not large), the fluid will flow along the object surface. Moreover, when the ceiling recessed fan is in a cooling mode, the air deflector at the air outlet is generally set horizontally to increase the air output distance of the ceiling recessed fan, but in fact, the air output of the ceiling recessed fan will flow along a direction where the air deflector goes away from the ceiling under the wall attachment effect, which finally causes that the actual air output effect of the ceiling recessed fan becomes worse. However, in the related art, in order to ensure the air supply distance of the ceiling recessed fan, it is generally to simply use a method of increasing the relevant parameters of the fan (the diameter and rotation speed of the fan) so as to raise the air output volume, which results in that it is necessary to increase the overall dimension of the ceiling recessed fan or add to the cost. However, the applicant has found through studies on the air output airflow of the ceiling recessed fan and analysis of the simulation experiment data that, the technical solution of increasing the relevant parameters of the fan actually does more harm than good, which is not conducive to further development of the industry. Whereas, the parameters concerning the tilting angle of the air deflector, which are neglected and ignored in the art, are aspects to be improved that can effectively enhance an air supply distance of the ceiling recessed fan in turn.

[0543] According to a sixth embodiment of the present disclosure, a ceiling recessed fan as shown in Figs. 25 to 30 is provided, which includes: a main body frame; an air outlet assembly arranged in the main body frame, wherein when the ceiling recessed fan is in a cooling mode, a height difference is formed between the air outlet assembly and the main body frame, and an air outlet is formed between the air outlet assembly and the main body frame; and a first air deflector arranged on a swinging mechanism, and swingably arranged at the air outlet. The plane of the first air deflector tilts upward relative to the mounting planar face of the main body frame, and the angle c between the plane of the first air deflector and the mounting planar face is in the range of -10°≤c≤0°. Even if the first air deflector 4a tilts upward at a certain angle to ensure that the air output of the ceiling recessed fan flows against the ceiling as much as possible, the horizontal air supply distance of the ceiling recessed fan in a cooling mode is ensured, and the waterfall refrigeration effect is realized at a maximum efficiency.

[0544] Taking the experiment data of a 3 horse power air conditioner as an example, simulation is performed by adjusting the value of the angle c. Wherein, with the upward tilting of the plane where the first air deflector 4a is located relative to the mounting planar face of the main body frame 1a (upward reflex of the first air deflector) as a negative angle, and the downward tilting of the plane where the first air deflector 4a is located relative to the mounting planar face of the main body frame 1a (downward swing of the first air deflector) as a positive angle, the simulation results are as follows: Angle cAir volume (m 3< / h)Air supply distance-15° (Figure 30)8383.1m-10° (Figure 26)9953.7m0° (Figure 27)10053.5m10° (Figure 28)11122.2m15° (Figure 29)11121.4m

[0545] From the experiment results, when the angle c is -10°, although the air volume does not reach a maximum value, there is a small difference from the maximum air volume, and its air supply distance reaches a maximum value. When the angle c is reduced to -15°, the air volume and the air supply distance both begin to decrease, and at this time, the air volume is attenuated to the extent where the air output requirements of the ceiling recessed fan cannot be satisfied. When the angle c increases to 0°, the attenuation of the air volume begins to decrease, but its air supply distance also begins to decrease. When the angle c continues to increase to 10°, the air volume reaches a maximum value, but the air supply distance is seriously attenuated, so that the limit where the air output requirements of the ceiling recessed fan cannot be satisfied is almost reached. When the angle c continues to increase to 15°, the air volume reaches a maximum value, but the air supply distance has been attenuated from 3.7m to 1.4m, and the horizontal air output of the ceiling recessed fan cannot be realized at this time. Also that is, when the ceiling recessed fan needs a small air output volume, the angle c with a small value (for example, when the angle C is -10° to 0°) is used, and at this time, the first air deflector 4a is upwardly tilted as much as possible to deflect the air output of the ceiling recessed fan to the ceiling to a maximum extent, so that the air output of the ceiling recessed fan flows against the ceiling as much as possible, thereby ensuring the waterfall refrigeration effect of the horizontal air output of the ceiling recessed fan.

[0546] It is to be noted that, the main body frame 1a is a main load-bearing structure of the ceiling recessed fan. When the ceiling recessed fan is installed, the main body frame 1a is used to be mounted on the ceiling, and other structures are directly or indirectly mounted on the main body frame 1a and fixed to the ceiling through the main body frame 1a.

[0547] The air outlet assembly 3a is arranged in the main body frame 1a in a way so as to be able to be raised and lowered, and the air outlet assembly 3a has an operation position descending to a set height to form a height difference. After the ceiling recessed fan begins to work, the air outlet assembly 3a descends downward relative to the main body frame 1a, and when the air outlet assembly 3a reaches a set height, an air outlet 10a is formed, thereby ensuring that the ceiling recessed fan can perform normal heat exchange operation.

[0548] The air outlet assembly 3a has a first descending height h, and the first descending height h is in the range of 20mm≤h≤28mm when the ceiling recessed fan is in a cooling mode. Wherein, the descending stroke of the air outlet assembly 3a is greater than 28mm. In some embodiments, the descending stroke of the air outlet assembly 3a is greater than 36 mm.

[0549] Taking the experiment data of a 3 horse power air conditioner as an example, simulation is performed by adjusting the value of the first descending height h. Wherein, with the upward tilting of the plane where the first air deflector 4a is located relative to the mounting planar face of the main body frame 1a (upward reflex of the first air deflector) as a negative angle, and the downward tilting of the plane where the first air deflector 4a is located relative to the mounting planar face of the main body frame 1a (downward swing of the first air deflector) as a positive angle, the simulation results are as follows: Descending height h (mm)Angle cAir volume (m 3< / h)Air supply distance20-10°7533.3m0°8343.5m10°9242.8m28-10°9953.7m0°10053.5m10°11122.2m36-10°11002.4m0°11122m10°11121.4m

[0550] From the experiment results, taking the angle c of -10° as an example, when h reaches 28mm, although the air volume does not reach a maximum value, there is a small difference from the maximum air volume, and its air supply distance reaches a maximum value. When h increases to 36mm, at this time, the air volume substantially reaches a maximum value, but the air supply distance is seriously attenuated, which cannot satisfy the air output requirements of the ceiling recessed fan. When h is reduced to 20mm, the air volume and the air supply distance both begin to decrease, which results in that the ceiling recessed fan cannot achieve a better efficiency. Taking the angle c of 0° as an example, when h reaches 28mm, there is a small difference from the air volume and air supply distance to a maximum value. When h increases to 36mm, the air volume reaches a maximum value, but the air supply distance is seriously attenuated from 3.5m to 2m, which cannot satisfy the air output requirements of the ceiling recessed fan. When h is reduced to 20mm, although the air supply distance is substantially not changed, its air volume is seriously attenuated, and the air output effect of the ceiling recessed fan is still less favorable than the air output effect when h reaches 28 mm. Also that is, in the case where the angle c is in the range of -10° to 0°, when the air outlet assembly 3a descends to 20mm to 28mm, it is possible to improve the air output effect of the ceiling recessed fan.

[0551] The ceiling recessed fan is an air treatment device installed on the ceiling for indoor heat exchange. Due to the structure and installation requirements of the ceiling recessed fan, some structures of the ceiling recessed fan necessarily project out of the ceiling. When the ceiling recessed fan performs cooling, in the related art, it is generally to use a horizontal air supply method to allow that the airflow flows against the ceiling to increase the air supply distance, so as to achieve waterfall refrigeration. However, because of the parts of the ceiling recessed fan projecting out of the ceiling, the actual air output of the ceiling recessed fan cannot be attached to the ceiling, and upon departure from the parts of the ceiling recessed fan projecting out of the ceiling, the air output circulation area of the ceiling recessed fan instantaneously increases, so that the actual air output effect of the ceiling recessed fan becomes worse. The applicant has found through studies on the flow principles of the airflow and analysis of the experiment data in simulation that, the solution of designing the parts of the ceiling recessed fan that project out of the ceiling and providing corresponding structures thereon which can better deflect the air output of the ceiling recessed fan, is an aspect to be improved that can effectively enhance the air output effect of the ceiling recessed fan.

[0552] According to a seventh embodiment of the present disclosure, a ceiling recessed fan as shown in Figs. 30 to 33 is provided, which includes: a main body frame 1a, an air outlet assembly 3a and an air deflecting structure. The air outlet assembly 3a is arranged in the main body frame 1a in a way so as to be able to be raised and lowered, and the air outlet assembly 3a has an operation position descending to a predetermined height, wherein an air outlet 10a is formed between the air outlet assembly 3a and the main body frame 1a. The air deflecting structure is arranged in the main body frame 1a, and capable of deflecting the air output of the air outlet when the ceiling recessed fan is in a cooling mode.

[0553] In the present disclosure, the airflow passing through the side frame is deflected by the air deflecting structure, and the air deflecting structure can change the direction of an upper layer portion of the airflow at the air outlet, thereby overcoming the problem found by the inventors that the airflow cannot favorably flow against the ceiling because the main body frame projects out of the ceiling, thereby improving the air output effect of the ceiling recessed fan and realizing waterfall refrigeration.

[0554] It is to be noted that, the main body frame 1a is a main load-bearing structure of the ceiling recessed fan. When the ceiling recessed fan is installed, the main body frame 1a is used to be mounted on the ceiling, and other structures are directly or indirectly mounted on the main body frame 1a and fixed to the ceiling through the main body frame 1a.

[0555] As one embodiment, the main body frame 1a includes a side frame 11a, at least part of the air output of the air outlet passes through the side frame 11a, and the air deflecting structure includes a first air deflector 6a swingably arranged on the side frame 11a. Part of the air output at the air outlet (particularly the upper layer airflow at the air outlet) is deflected by the first air deflector 6a, and under the deflection of the wall attachment effect, so that the part of the air outlet can further flow to the mounting planar face of the main body frame 1a along with the first air deflector 6a, thereby finally increasing the air supply distance and the air output effect of the ceiling recessed fan. Wherein, the width of the first air deflector 6a which is less than or equal to the width of the side frame 11a, is selected and set according to actual needs.

[0556] The plane where the first air deflector 6a is located tilts upward relative to the horizontal plane to form a tilting angle d, and the angle range of the tilting angle d is 0°<d≤10°; and / or, the plane where the first air deflector 6a is located is parallel to the horizontal plane, that is, the angle of the tilting angle d is 0° at this time.

[0557] Taking the experiment data of a 3 horse power air conditioner as an example, in this solution, the tilting angle d is adjusted, wherein the upward tilting of the plane where the first air deflector 6a is located relative to the horizontal plane is a positive angle and the downward tilting relative to the horizontal plane is a negative angle, and the simulation structure is as follows: Included angle dAir volume (m 3< / h)Air supply distance15°11123.3m10°11123.4m5°11123.5m0°11003m-5°10522.6m

[0558] From the experiment results, when the included angle d is 5° (that is, the plane where the first air deflector is located tilts upward by 5° relative to the horizontal plane at this time), the air volume reaches a maximum value, and the air supply distance also reaches a maximum value. When the included angle d is 0° (at this time, the plane where the first air deflector is located is parallel to the horizontal plane), the air volume begins to decrease, and the air supply distance also begins to decrease. When the included angle d is -5° (at this time, the plane where the first air deflector is located tilts downward by 5° relative to the horizontal plane), the air volume is seriously attenuated, and the air supply distance is also seriously reduced. When the included angle d is 10° (at this time, the plane where the first air deflector is located tilts upward by 10° relative to the horizontal plane), the air volume is not changed obviously, but the air supply distance begins to decrease. When the included angle d is 15° (at this time, the plane where the first air deflector is located tilts upward by 15° relative to the horizontal plane), the air volume is not changed obviously, and the air supply distance is greatly attenuated. Moreover, the dimension of the ceiling recessed fan projecting out of the ceiling is required to be large at this time, which will affect the aesthetic feeling of the ceiling recessed fan. Taking the first air deflector with a width of 3cm as an example, when the plane where the first air deflector is located tilts upward by 15° relative to the horizontal plane, a conventional dimension of the ceiling recessed fan projecting out of the ceiling cannot satisfy the requirements of this dimension at this time, and thus the included angle of 15° cannot be used.

[0559] The air outlet assembly also includes a second air deflector 4a swingably arranged at the air outlet 10a. The included angle e between the plane of the first air deflector 6a and the plane of the second air deflector 4a is in the angle range of -10°≤e≤10°, and when e=0°, the plane of the first air deflector 6a is parallel to the plane of the second air deflector 4a. By joint cooperation between the first air deflector 6a and the second air deflector 4a, the air supply distance of the ceiling recessed fan is further enhanced, thereby improving the air output effect of the ceiling recessed fan.

[0560] Taking the experiment data of a 3 horse power air conditioner as an example, in this solution, the plane where the second air deflector 4a is located is parallel to the horizontal plane, and simulation is performed by adjusting the angle of the first air deflector, wherein the upward tilting of the plane where the first air deflector 6a is located is a positive angle and the downward tilting is a negative angle relative to the horizontal plane. The simulation results are as follows: Included angle eAir volume (m 3< / h)Air supply distance15°7483.210°8303.30°9953.5m-10°10053.5-15°11122.5

[0561] From the simulation results, when the angle e is 0° (at this time, the plane where the first air deflector is located is parallel to the plane where the second air deflector is located), at this time, the air volume substantially reaches a maximum value, and the air supply distance also reaches a maximum value. When the angle e is -10°, the air volume can reach a maximum value, but the air supply distance begins to be attenuated. When the angle e is -15°, the air volume still remains at the maximum value, but the air supply distance is seriously attenuated, which cannot achieve horizontal air output against the wall during cooling. When the angle e is 10°, the air volume and the air supply distance both begin to be attenuated. When the angle e is 15°, the air volume and the air supply distance are seriously attenuated, which cannot ensure the normal refrigeration efficiency of the ceiling recessed fan.

[0562] As another embodiment, the main body frame 1a includes a side frame 11a, at least part of the air output of the air outlet 10a passes through the side frame 11a, and an air deflecting channel 7a formed on the side frame 11a constitutes an air deflecting structure. The air deflecting channel is used to reduce the influence of the side frame 11a on the airflow at the air outlet, and deflect the airflow passing through the side frame 11a (the upper layer airflow at the air outlet), so as to change the airflow structure at the air outlet and improve the air output effect of the ceiling recessed fan.

[0563] The width of the air deflecting channel 7a gradually increases along the air output direction. Wherein, the width of the air deflecting channel 7a refers to the dimension in the direction of a connection line between two adjacent corners of the ceiling recessed fan. Wherein, the horizontal section of the air deflecting channel is in the shape of volcano, and wherein, the narrow crater of the volcano shape faces toward the interior of the ceiling recessed fan. On the premise of maintaining a constant overall thickness of the side frame 11a, the side frame 11a is provided with an air deflecting channel 7a in the shape of volcano, and at this time, and when part of the air output of the air outlet 10a passes through the air deflecting channel 7a, it is possible to gradually flow to the corner of the ceiling recessed fan under the deflection of the air deflecting channel 7a, thereby increasing the air output range of the ceiling recessed fan.

[0564] As another embodiment, the depth of the air deflecting channel 7a is gradually increased. Wherein, the depth of the air deflecting channel 7a refers to the dimension of the ceiling recessed fan in the thickness direction. Along the air output direction of the air outlet, the distance from the bottom surface of the air deflecting channel 7a to the same horizontal plane gradually increases. For example, the cross section of the air deflecting channel 7a is a right-angled trapezoid, the diagonal of the right-angled trapezoid constitutes the bottom surface of the air deflecting channel 7a, and the air output of the air outlet 10a sequentially passes through the base of the right-angled trapezoid with a small size and the base of the right-angled trapezoid with a large size. Wherein, the overall dimension of the side frame 11a does not change, and part of the air output of the air outlet 10a can gradually flow to the mounting planar face (for example, the ceiling) of the main body frame 1a along the bottom surface of the air deflecting channel 7a when passing through the air deflecting channel 7a, so that the airflow flowing out of the air deflecting channel 7a can be attached to the mounting planar face in parallel as much as possible, thereby increasing the flow distance of the airflow on the mounting planar face and increasing the air supply distance.

[0565] The air outlet assembly 3a includes an air outlet frame, wherein an air outlet is formed between the air outlet frame and the main body frame, and the air outlet frame is lifted independently. In other embodiments not shown, the air outlet assembly 3a includes an air outlet frame and an air return panel, wherein an air outlet is formed between the air outlet frame and the main body frame, the air return panel is provided with an air return gate, and the air outlet frame and the air return panel are connected and lifted together.

[0566] The following relationship is present between the air supply distance and the air outlet volume of the ceiling recessed fan in the related art: when the air supply distance is long, the air outlet volume thereof is attenuated more, and when the air supply distance is short, the air outlet volume is attenuated less. Moreover, under the structural restriction of the ceiling recessed fan, since the structure of the internal air duct of the ceiling recessed fan is generally fixed, the method of adjusting the air output distance and the air volume by all the ceiling recessed fan is to adjust the air output direction of the ceiling recessed fan by setting the air deflector at the air outlet to enhance the air output effect of the ceiling recessed fan. However, the applicant has found through studies on the air output airflow of the ceiling recessed fan and analysis of the simulation experiment data that, the solution of providing the air deflector at the air outlet alone actually has a small influence on the air output effect of the ceiling recessed fan, and the air output direction of the air outlet duct, which is neglected and ignored in the art, is an aspect to be improved that may effectively enhance a heating efficiency of the ceiling recessed fan in turn.

[0567] Accordingly, according to an eighth embodiment of the present disclosure, a ceiling recessed fan with a second air deflector as shown in Figs. 34 and 35 is provided, which includes: a main body frame 1a internally provided with an air outlet duct 2a having a first end 21a and a second end 22a provided along the airflow direction; an air outlet assembly 3a arranged in the main body frame 1a in a way so as to be able to be raised and lowered, and the air outlet assembly 3a has an operation position that descends to a predetermined height, wherein an air outlet 10a is formed between the air outlet assembly 3a and the main body frame 1a, and the air outlet 10a communicates with the second end 22a of the air outlet duct 2a; a second air deflector 6a swingably arranged in the air outlet duct 2a and capable of changing an air output direction of the air outlet duct 2a; and a first air deflector 4a swingably arranged on the air outlet assembly 3a and capable of adjusting a height of the air outlet 10a when the air outlet assembly 3a is in an operation position. By joint cooperation between the first air deflector 4a and the second air deflector 6a, the adjustment of the air output direction of the ceiling recessed fan is further increased, and the air output effect of the ceiling recessed fan is finally improved. When the air outlet assembly 3a is in an operation position, an included angle c is formed between the plane where the first air deflector 4a is located and the plane where the second air deflector 6a is located. The second air deflector 6a is arranged to deflect the airflow direction in the air outlet channel. For example, when the air output volume of the ceiling recessed fan is large, at this time, the obstruction effect produced by the structure of the ceiling recessed fan between the second end of the air outlet channel and the air outlet is not obvious, and the air output direction at the air outlet can achieve preset requirements, so that the second air deflector 6a does not need to deflect the airflow in the air outlet channel 2a at this time. Also that is, at this time, the second air deflector 6a is parallel to the airflow direction in the air outlet duct 2a. However, when the air output volume is small, the structure of the ceiling recessed fan between the second end of the air outlet duct and the air outlet will seriously obstruct the air circulation inside the ceiling recessed fan, and even with turbulence, so that the air output direction of the air outlet 10a will change uncontrollably. At this time, the second air deflector 6a is adjusted to adjust the airflow direction in the air outlet duct 2a. The air output direction of the air outlet duct is closer to the required air output direction of the air outlet 10a, thereby reducing the obstruction effect of the ceiling recessed fan structure between the second end of the air outlet duct and the air outlet as much as possible, and improving the air output effect of the ceiling recessed fan. At the same time, the angle c is defined to provide a standard for a designer, which facilitates determining the parameters of the second air deflector 6a. For example, the width of the second air deflector 6a is determined according to a maximum value of the angle c and the width of a corresponding position of the air outlet duct, which avoids interference between the second air deflector 6a and the inner surface of the air outlet duct when the second air deflector 6a swings to the angle c. Wherein, the maximum value of the angle c is inversely proportional to the width of the second air deflector 6a. The greater the maximum value of the angle c is, the smaller the value of the width of the second air deflector 6a will be. The smaller the maximum value of the angle c is, the greater the value of the width of the second air deflector 6a will be. It is ensured that the air output effect of the ceiling recessed fan product achieves preset requirements.

[0568] Wherein, the air output direction of the air outlet duct 2a is the flow direction of the airflow flowing through the second end 22a of the air outlet duct 2a, and the air output direction of the air outlet is the flow direction of the airflow flowing through the air outlet. The height of the air outlet 10a is the height between the edge of the main body frame 1a forming the lowermost point of the air outlet duct 2a and the outermost edge of the first air deflector 4a in the lifting direction of the air outlet assembly 3a.

[0569] It is to be noted that, the main body frame 1a is a main load-bearing structure of the ceiling recessed fan. When the ceiling recessed fan is installed, the main body frame 1a is used to be mounted on the ceiling, and other structures are directly or indirectly mounted on the main body frame 1a and fixed to the ceiling through the main body frame 1a.

[0570] The ceiling recessed fan has a cooling mode. When the ceiling recessed fan is in a cooling mode, the included angle c is in the range of 90° to 110°.

[0571] Taking the ceiling recessed fan provided by some embodiments of the present disclosure as an example, under the condition that the width of the second air deflector is 30mm, simulation is performed by adjusting the angle of the included angle c, and the simulation results are as follows: Angle cAir volumeAir supply distance80°10002.9m90°10893.4m100°11123.5m110°10553.4m120°9902.6m

[0572] From the simulation results, when the ceiling recessed fan is in a cooling mode, when the included angle c is 100°, the air volume and the air supply distance both reach a maximum value. When the included angle c increases to 110°, the air volume and the air supply distance both begin to decrease. When the included angle c continues to increase to 120°, the air volume and the air supply distance are both seriously attenuated, which cannot satisfy the requirements of the ceiling recessed fan. When the included angle c is reduced to 90°, the air volume and the air supply distance both begin to decrease. When the included angle c continues to decrease to 80°, the air volume and the air supply distance will also be seriously attenuated, which cannot meet the requirements of the ceiling recessed fan. Also that is, when the ceiling recessed fan is in a cooling mode and the included angle c is in the range of 90° to 110°, the air volume and the air supply distance can be reasonably matched to satisfy the air output requirements of the ceiling recessed fan.

[0573] The ceiling recessed fan has a heating mode. When the ceiling recessed fan is in a heating mode, the included angle c is in the range of 145° to 165°.

[0574] Taking the ceiling recessed fan provided by some embodiments of the present disclosure as an example, under the condition that the width of the second air deflector is 30mm, simulation is performed by adjusting the angle of the included angle c, and the simulation results are as follows: Angle cAir volumeAir supply distance135°10050.5m145°10890.8m155°11121.0m165°11121.2m175°10001.5m

[0575] From the simulation results, when the ceiling recessed fan is in a heating mode, when the included angle c is 155°, the air volume reaches a maximum value. Although the air supply distance does not reach a minimum value, this air supply distance can allow the air output of the ceiling recessed fan to substantially blow out vertically downward, so as to realize rapid heating. When the included angle c increases to 165°, although the air volume remains unchanged, the air supply distance begins to increase, which indicates that the efficiency of the air output of the ceiling recessed fan flowing to the ground decreases at this time. When the included angle c continues to increase to 175°, the air volume is seriously attenuated, and the air supply distance is seriously increased, which cannot satisfy the requirements of the ceiling recessed fan. When the included angle c decreases to 145°, the air volume begins to decrease, and the air supply distance also begins to decrease. However, as the air output of the ceiling recessed fan surrounds the periphery of the air return gate, when the air supply distance decreases, it is already indicated that there is a possible phenomenon of intaking part of the airflow of the air outlet by the air return gate. When the included angle c continues to decrease to 135°, the air volume and the air supply distance will also be seriously attenuated. At this time, the air supply distance indicates that the ceiling recessed fan is necessarily present with a phenomenon of intaking the air output of the air outlet by the air return gate at this time, so that it is already impossible to improve the air output effect of the ceiling recessed fan. Also that is, when the ceiling recessed fan is in a heating mode and the included angle c is in the range of 145° to 165°, the air volume and the air supply distance can be reasonably matched to satisfy the air output requirements of the ceiling recessed fan.

[0576] The air outlet assembly has a closed position to close the air outlet 10a in cooperation with the main body frame 1a, and the air deflector 4a has a first edge 41a and a second edge 42a. When the air outlet assembly 3a is in the closed position, the first edge 41a is sealed with a corresponding position of the main body frame 1a, and the second edge 42a is sealed with a corresponding edge of the air outlet assembly 3a. By way of a corresponding seal between the first edge 41a and the main body frame 1a and a corresponding seal between the second edge 42a and the air outlet assembly, it is ensured that when the air outlet assembly is in the closed position, the air deflector 4a can enclose a corresponding position of the air outlet 10a, thereby avoiding impurities such as dust entering the interior of the ceiling recessed fan from the position of the air outlet 10a to affect the performance of the ceiling recessed fan.

[0577] When the air outlet assembly 3a is in the closed position, the air outlet assembly 3a and the air deflector 4a jointly cooperate with the main body frame 1a to form a seal.

[0578] The second edge 42a is provided with a first step structure, and the air outlet assembly 3a is provided with a second step structure fit with the first step structure. When the air outlet assembly 3a is in the closed position, the first step structure is sealingly fit with the second step structure. The first step structure and the second step structure not only make the sealing between the air deflector 4a and the air outlet assembly 3a reliable, but also allow that the structure of the air outlet assembly 3a is not be affected by a structural interference between the air deflector 4a and the air outlet assembly 3a during the swinging process of the air deflector 4a.

[0579] The first step structure is provided with a seal, and when the air outlet assembly 3a is in the closed position, the seal is arranged between the first step structure and the second step structure. Also that is, the seal moves together with the air deflector, and when the air deflector is sealed relative to the air outlet assembly, the seal can enclose a slit between the air deflector and the air outlet assembly, thereby enhancing the sealing effect between the air deflector and the air outlet assembly.

[0580] The ceiling recessed fan also includes a swinging mechanism arranged on the air outlet assembly 3a, and the air deflector 4a is arranged on the swinging mechanism.

[0581] The swinging mechanism includes a rotary arm 5a, one end of which is hinged to the air outlet assembly 3a, and the other end of which is arranged on the air deflector 4a. In some embodiments, both ends of the air deflector 4a in the length direction are provided with a rotary arm 5a, thereby ensuring the synchronization of the overall movement of the air deflector 4a.

[0582] The swinging mechanism also includes a driving member arranged on the air outlet assembly 3a and directly or indirectly driving the rotary arm 5a to rotate. Wherein, one end of the rotary arm 5a is arranged on the driving member, and the air deflector 4a is arranged on the other end of the rotary arm 5a. When the rotary arm 5a rotates with the end arranged on the driving member, the air deflector 4a may move together with the end of the rotary arm 5a, so as to realize the swing of the air deflector 4a, wherein the driving member is a stepper motor.

[0583] The second air deflector 6a divides the air outlet duct 2a into a first air outlet duct and a second air outlet duct.

[0584] Along the airflow direction of the air outlet duct 2a, the width of the first air outlet duct gradually decreases; and / or along the airflow direction of the air outlet duct 2a, the width of the second air outlet duct 2a gradually decreases.

[0585] The ceiling recessed fan has a cooling mode. When the ceiling recessed fan is in a cooling mode, the ratio of the average width D1 of the first air outlet duct to the average width D2 of the second air outlet duct is in the range of 1.0≤D1 / D2≤1.1.

[0586] Taking the ceiling recessed fan provided by some embodiments of the present disclosure as an example, under the condition that the width of the second air deflector is 30mm, simulation is performed by adjusting the ratio of D1 / D2 and the angle of the included angle c, and the simulation results are as follows: Angle cD1 / D2Air volumeAir supply distance80°1.110002.9m90°1.110893.4m100°1.111123.5m110°1.010553.4m120°1.09902.6m

[0587] From the simulation results, when the ceiling recessed fan is in a cooling mode, under the condition that D1 / D2 is 1.1, when the included angle c is 100°, the air volume and the air supply distance both reach a maximum value. When the included angle c decreases to 90°, the air volume and the air supply distance both begin to decrease. When the included angle c continues to decrease to 80°, the air volume and the air supply distance will also be seriously attenuated, which cannot satisfy the requirements of the ceiling recessed fan. Under the condition that D1 / D2 is 1.0, when the included angle c increases to 110°, the air volume and the air supply distance both begin to decrease. When the included angle c continues to increase to 120°, the air volume and the air supply distance are both seriously attenuated, which cannot meet the requirements of the ceiling recessed fan. Also that is, when the ceiling recessed fan is in a cooling mode, under the condition that D1 / D2 is 1.1, when the included angle c is within the range of 90° to 100° , the air volume and the air supply distance can be reasonably matched to satisfy the air output requirements of the ceiling recessed fan. Under the condition that D1 / D2 is 1.0, when the included angle c is in the range of 100° to 110°, the air volume and the air supply distance can be reasonably matched to satisfy the air output requirements of the ceiling recessed fan.

[0588] The ceiling recessed fan has a heating mode. When the ceiling recessed fan is in a heating mode, the ratio of the average width D1 of the first air outlet duct to the average width D2 of the second air outlet duct is in the range of 1.2≤D1 / D2≤1.25.

[0589] Taking the ceiling recessed fan provided by some embodiments of the present disclosure as an example, under the condition that the width of the second air deflector is 30mm, simulation is performed by adjusting the ratio of D1 / D2 and the angle of the included angle c, and the simulation results are as follows: Angle cD1 / D2Air volumeAir supply distance135°1.2510050.5m145°1.210890.8m155°1.211121.0m165°1.211121.2m175°1.2510001.5m

[0590] From the simulation results, when the ceiling recessed fan is in a heating mode, under the condition that D1 / D2 is 1.2, when the included angle c is 155°, the air volume and the air supply distance both reach a maximum value. When the included angle c is reduced to 145°, the air volume and the air supply distance both begin to decrease. When the included angle c is increased to 165°, although the air volume remains unchanged, the air supply distance begins to increase, which will still make the heating effect of the ceiling recessed fan become worse. Under the condition that D1 / D2 is 1.25, when the included angle c continues to decrease to 135°, the air volume and the air supply distance will also be seriously attenuated, which cannot satisfy the requirements of the ceiling recessed fan. When the included angle c continues to increase to 175°, the air volume is seriously attenuated, and the air supply distance is too large, which cannot satisfy the requirements of the ceiling recessed fan. Also that is, when the ceiling recessed fan is in a heating mode, under the condition that D1 / D2 is 1.2, when the included angle c is within the range of 145° to 165° , the air volume and the air supply distance can be reasonably matched to satisfy the air output requirements of the ceiling recessed fan. Under the condition that D1 / D2 is 1.25, when the included angle c is in the range of less than 145° or more than 165°, it is impossible to satisfy the requirements of the ceiling recessed fan.

[0591] The ceiling recessed fan has a cooling mode. When the ceiling recessed fan is in a cooling mode, the included angle between the second air deflector and the vertical surface is in the range of 0° to 20°.

[0592] Taking the ceiling recessed fan provided by some embodiments of the present disclosure as an example, under the condition that the width of the second air deflector is 30mm and the included angle between the first air deflector and the vertical surface is 90°, simulation is performed by adjusting the included angle between the second air deflector and the vertical surface to realize the angle change of the included angle c, and the simulation results are as follows: Angle cIncluded angle between the second air deflector and the vertical surfaceAir volumeAir supply distance80°-10°10002.9m90°0°10893.4m100°10°11123.5m110°20°10553.4m120°30°9902.6m

[0593] From the simulation results, when the ceiling recessed fan is in a cooling mode, when the included angle c is 100°, the air volume and the air supply distance both reach a maximum value. When the included angle c increases to 110°, the air volume and the air supply distance both begin to decrease. When the included angle c continues to increase to 120°, the air volume and the air supply distance are both seriously attenuated, which cannot satisfy the requirements of the ceiling recessed fan. When the included angle c is reduced to 90°, the air volume and the air supply distance both begin to decrease. When the included angle c continues to decrease to 80°, the air volume and the air supply distance will also be seriously attenuated, which cannot meet the requirements of the ceiling recessed fan. Also that is, when the ceiling recessed fan is in a cooling mode and the included angle c is in the range of 90° to 110°, i.e., the included angle between the second air deflector and the vertical surface is in the range of 0° to 20°, the air volume and the air supply distance can be reasonably matched to satisfy the air output requirements of the ceiling recessed fan.

[0594] The ceiling recessed fan has a heating mode. When the ceiling recessed fan is in a heating mode, the included angle between the second air deflector and the vertical surface is in the range of -10° to 10°.

[0595] Taking the ceiling recessed fan provided by some embodiments of the present disclosure as an example, under the condition that the width of the second air deflector is 30mm and the included angle between the first air deflector and the vertical surface is 90°, simulation is performed by adjusting the included angle between the second air deflector and the vertical surface to realize the angle change of the included angle c, and the simulation results are as follows: Angle cIncluded angle between the second air deflector and the vertical surfaceAir volumeAir supply distance135°-10°10050.5m145°0°10890.8m155°10°11121.0m165°20°11121.2m175°30°10001.5m

[0596] From the simulation results, when the ceiling recessed fan is in a heating mode, when the included angle c is 155°, the air volume reaches a maximum value. Although the air supply distance does not reach a minimum value, this air supply distance can allow the air output of the ceiling recessed fan to substantially blow out vertically downward, so as to realize rapid heating. When the included angle c increases to 165°, although the air volume remains unchanged, the air supply distance begins to increase, which indicates that the efficiency of the air output of the ceiling recessed fan flowing to the ground decreases at this time. When the included angle c continues to increase to 175°, the air volume is seriously attenuated, and the air supply distance is seriously increased, which cannot satisfy the requirements of the ceiling recessed fan. When the included angle c decreases to 145°, the air volume begins to decrease, and the air supply distance also begins to decrease. However, as the air output of the ceiling recessed fan surrounds the periphery of the air return gate, when the air supply distance decreases, it is already indicated that there is a possible phenomenon of intaking part of the airflow of the air outlet by the air return gate. When the included angle c continues to decrease to 135°, the air volume and the air supply distance will also be seriously attenuated. At this time, the air supply distance indicates that the ceiling recessed fan is necessarily present with a phenomenon of intaking the air output of the air outlet by the air return gate at this time, so that it is already impossible to improve the air output effect of the ceiling recessed fan. When the ceiling recessed fan is in a heating mode and the included angle c is in the range of 145° to 165°, i.e., the included angle between the second air deflector and the vertical surface is in the range of -10° to 10°, the air volume and the air supply distance can be reasonably matched to satisfy the air output requirements of the ceiling recessed fan.

[0597] The ceiling recessed fan also includes a lifting mechanism arranged in the main body frame 1a, and the air outlet assembly 3a is arranged on the lifting mechanism. The air outlet assembly 3a may project from or retract into the main body frame 1a by means of the lifting mechanism, so that the air outlet assembly 3a may move freely between the operation position and the closed position.

[0598] The air outlet assembly 3a includes an air outlet frame, wherein an air outlet is formed between the air outlet frame and the main body frame, and the air outlet frame is lifted independently. In other embodiments not shown, the air outlet assembly 3a includes an air outlet frame and an air return panel, wherein an air outlet is formed between the air outlet frame and the main body frame, the air return panel is provided with an air return gate, and the air outlet frame and the air return panel are connected and lifted together.

[0599] The following relationship is present between the air supply distance and the air outlet volume of the ceiling recessed fan in the related art: when the air supply distance is long, the air outlet volume thereof is attenuated more, and when the air supply distance is short, the air outlet volume is attenuated less. In view of the problem that the air outlet volume is attenuated more when the air supply distance is long present in the ceiling recessed fan that has been found by the inventors, in the related art, it is generally to simply increase the relevant parameters of the fan (the diameter and rotation speed of the fan) so as to raise the air outlet volume, which results in that it is necessary to increase the overall dimension of the ceiling recessed fan or add to the cost. However, the applicant has found through studies on the air output airflow of the ceiling recessed fan and analysis of the simulation experiment data that, the technical solution of increasing the relevant parameters of the fan actually does more harm than good, which is not conducive to further development of the industry. Whereas, the relationship concerning the height of the air outlet and the minimum circulation area of the air outlet duct, which is neglected and ignored in the art, can effectively enhance an improved matching degree between the air supply distance and the air volume of the ceiling recessed fan in turn.

[0600] Therefore, in order to ensure that the air supply distance and the air output volume of the ceiling recessed fan reach a better level as much as possible, a ceiling recessed fan with an air outlet as shown in Figure 36 is provided in a ninth embodiment of the present disclosure, which includes: a main body frame 1a internally provided with an air outlet duct 2a having a first end 21a and a second end 22a; and an air outlet assembly 3a arranged in the main body frame 1a in a way so as to be able to be raised and lowered, wherein the air outlet assembly 3a descends so that an air outlet 10a is formed between the air outlet assembly 3a and the main body frame 1a, and the air outlet 10a communicates with the air outlet duct 2a. The ratio of the circulation area S1 of the air outlet 10a to the circulation area S2 of the first end 21a is in the range of 0.7≤S1 / S2≤1.27.

[0601] It is to be noted that, the main body frame 1a is a main load-bearing structure of the ceiling recessed fan. When the ceiling recessed fan is installed, the main body frame 1a is used to be mounted on the ceiling, and other structures are directly or indirectly mounted on the main body frame 1a and fixed to the ceiling through the main body frame 1a.

[0602] In some embodiments, the circulation area S2 of the first end 21a of the air outlet duct 2a is a fixed value, and the circumference of the air outlet assembly 3a is also a fixed value. With the change of the descending height of the air outlet assembly 3a, the height h1 of the air outlet 10a also changes gradually. At this time, the circulation area S1 of the air outlet 10a is the product of the height h1 of the air outlet 10a and the circumference of a portion of the air outlet assembly 3a for forming the air outlet 10a. Also that is, with the change of the height h1 of the air outlet 10a, the circulation area S1 of the air outlet also changes synchronously. The height h1 of the air outlet 10a refers to the height between the edge of the main body frame 1a forming the lowermost point of the air outlet duct 2a and the outermost edge of the air outlet module 3a in the lifting direction of the air outlet assembly 3a. When the structure of the air outlet assembly 3a for forming the air outlet 10a with the main body frame 1a is a horizontal structure, the height h1 of the air outlet 10a is also expressed as the descending height of the air outlet assembly 3a.

[0603] Taking the experiment data of a 3 horse power air conditioner as an example, the value of S1 / S2 is adjusted for simulation. The simulation results are as follows: S1 / S2Air volume (m 3< / h)Air supply distance0.536673.3m0.78343.5m0.9811123.5m1.2711122m1.5811121.2m

[0604] From the simulation results, when S1 / S2 is 0.98, the air volume reaches a maximum value, and the air supply distance also reaches a maximum value. When S1 / S2 increased to 1.27, although the air volume remained at the maximum value, the air supply distance begins to decrease. When S1 / S2 continues to increase to 1.58, the air volume remains at the maximum value, but the air supply distance is seriously attenuated. When S1 / S2 is reduced to 0.7, although the air supply distance remains at the maximum value, the air volume begins to decrease. When S1 / S2 continues to decrease to 0.53, the air volume further decreases and the air supply distance also begins to decrease. Also that is, only when S1 / S2 is in the range of 0.7 to 1.27, the air volume and the air supply distance can be both ensured. When S1 / S2 is too large, the air supply distance is too small, and when S1 / S2 is too small, the air volume is too small.

[0605] The air outlet assembly 3a includes a rotatable air deflector 4a, and the air deflector 4a and the main body frame 1a form an air outlet 10a. The height h1 of the air outlet 10a can be adjusted during the rotation process of the air deflector 4a. At this time, the height h1 of the air outlet 10a refers to the height between the edge of the main body frame 1a forming the lowermost point of the air outlet duct 2a and the outermost edge of the air deflector 4a in the lifting direction of the air outlet assembly 3a.

[0606] The ceiling recessed fan also includes a rotating mechanism arranged on the air outlet assembly 3a, and the air deflector 4a is arranged on the rotating mechanism.

[0607] The rotating mechanism includes a rotary arm, one end of which is hinged to the air outlet assembly 3a, and the other end of which is arranged on the air deflector 4a. In some embodiments, both ends of the air deflector 4a in the length direction are provided with a rotary arm, thereby ensuring the synchronization of the overall movement of the air deflector 4a..

[0608] The rotating mechanism also includes a driving member arranged on the air outlet assembly 3a and drivingly connected with the rotary arm. Wherein, one end of the rotary arm is arranged on the driving member, and the air deflector 4a is arranged on the other end of the rotary arm. When the rotary arm rotates with the end arranged on the driving member, the air deflector 4a may move together with the end of the rotary arm, so as to realize the rotation of the air deflector 4a, wherein the driving member is a stepper motor.

[0609] The air outlet assembly 3a has a closed position to close the air outlet 10a in cooperation with the main body frame 1a, and the air deflector 4a has a first edge 41a and a second edge 42a. When the air outlet assembly 3a is in the closed position, the first edge 41a is sealed with a corresponding position of the main body frame 1a, and the second edge 42a is sealed with a corresponding edge of the air outlet frame.

[0610] A sealing structure is provided between the second edge 42a and the air outlet assembly 3a.

[0611] The ceiling recessed fan also includes a lifting mechanism arranged in the main body frame 1a, and the air outlet assembly 3a is arranged on the lifting mechanism. The air outlet assembly 3a may project from or retract into the main body frame 1a by means of the lifting mechanism, so that the air outlet assembly 3a may move freely between the operation position and the closed position.

[0612] The air outlet assembly 3a includes an air outlet frame, wherein an air outlet 10a is formed between the air outlet frame and the main body frame 1a, and the air outlet frame is lifted independently. In other embodiments not shown, the air outlet assembly 3a includes an air outlet frame and an air return panel, wherein an air outlet 10a is formed between the air outlet frame and the main body frame 1a, the air return panel is provided with an air return gate, and the air outlet frame and the air return panel are connected and lifted together.

[0613] The following relationship is present between the air supply distance and the air outlet volume of the ceiling recessed fan in the related art: when the air supply distance is long, the air outlet volume thereof is attenuated more, and when the air supply distance is short, the air outlet volume is attenuated less. Since the existing structure of the internal air duct of the ceiling recessed fan is generally fixed, the method of adjusting the air output distance and the air volume by all the ceiling recessed fan is to adjust the air output direction of the ceiling recessed fan by setting the air deflector at the air outlet to enhance the air output effect of the ceiling recessed fan. However, the applicant has found through studies on the air output airflow of the ceiling recessed fan and analysis of the simulation experiment data that, the solution of providing the air deflector at the air outlet alone actually has a small influence on the air output effect of the ceiling recessed fan, and the parameters concerning the matching relationship between the air output direction of the air outlet duct and the angle of the air deflector, which are neglected and ignored in the art, are aspects to be improved that may effectively enhance a heating efficiency of the ceiling recessed fan in turn.

[0614] Accordingly, according to a tenth embodiment of the present disclosure, a ceiling recessed fan as shown in Figure 37 is provided, which includes: a main body frame 1a internally provided with an air outlet duct 2a having a first end 21a and a second end 22a provided along the airflow direction; an air outlet assembly 3a disposed on the main body frame 1a in a way so as to be able to be raised and lowered, and the air outlet assembly 3a has an operation position that descends to a predetermined height, wherein an air outlet 10a is formed between the air outlet assembly 3a and the main body frame 1a, and the air outlet 10a communicates with the second end 22a of the air outlet duct 2a. When the air outlet assembly 3a is in an operation position, the angle b between the air outlet 10a and the air outlet duct 2a is in the angle range of 130° ≤b ≤ 150°. Wherein, the air output direction of the air outlet refers to the flow direction of air when passing through the flow section of the air outlet, and the air output direction of the air outlet duct 2a refers to the flow direction of air when flowing out of the air outlet duct 2a, that is, the flow direction of the airflow at the second end 22a.

[0615] Taking the experiment data of a 3 horse power air conditioner as an example, the value of the angle b is adjusted for simulation. The simulation results are as follows: Angle bAir volume (m 3< / h)Air supply distance125°8383.1m130°9953.5m140°10053.5m150°11122.2m155°11121.4m

[0616] From the simulation results, when the angle b is 140°, the air volume substantially reaches a maximum value, and the air supply distance can reach a maximum value. When the angle b increases to 150°, although the air volume reaches a maximum value, the air supply distance begins to decrease. When the angle b continues to increase to 155°, the air volume remains unchanged at the maximum value, and the air supply distance is seriously attenuated, which cannot achieve the waterfall refrigeration effect by horizontal air output. When the angle b is reduced to 130°, although the air supply distance remains unchanged at the maximum value, the air vo...

Claims

1. A ceiling recessed fan, comprising: a main body frame internally provided with an air outlet duct, wherein the air outlet duct comprises a first end and a second end along an airflow direction; an air outlet assembly arranged in the main body frame, wherein when the ceiling recessed fan is in a cooling mode, there is a height difference between the air outlet assembly and the main body frame, and an air outlet is formed between the air outlet assembly and the main body frame, and the air outlet communicates with a second end of the air outlet duct; a ratio of a height h1 of the air outlet to a width h2 of a first end of the air outlet duct is in a range of 1 / 3≤h1 / h2≤3 / 5.

2. The ceiling recessed fan according to claim 1, wherein the air outlet assembly is arranged in the main body frame in a way so as to be able to be raised and lowered, and the air outlet assembly has an operation position descending to a set height to form the height difference, and when the air outlet assembly is in the operation position, the ratio of the height h1 of the air outlet to the width h2 of the first end of the air outlet duct is in a range of 1 / 3≤h1 / h2≤3 / 5.

3. The ceiling recessed fan according to claim 1 or 2, wherein the air outlet assembly comprises an air deflector and an air outlet frame, the air outlet frame is arranged in the main body frame; the air deflector is rotatably arranged on the air outlet frame; and when the air outlet assembly is in an operation position, the air deflector is capable of adjusting a height of the air outlet.

4. The ceiling recessed fan according to claim 3, wherein the air deflector has a first position to allow the height h1 of the air outlet to reach a minimum value, and the ratio of a minimum height h1 of the air outlet to the width of a first end of the air outlet duct is in the range of 1 / 3≤h1 / h2≤3 / 5.

5. The ceiling recessed fan according to claim 3 or 4, wherein when the ceiling recessed fan is in a cooling mode, the included angle a between the plane where the air deflector is located and the horizontal plane is in the angle range of -10°≤a≤10°, and when a=0°, the plane where the air deflector is located is parallel to the horizontal plane.

6. The ceiling recessed fan according to claim 5, wherein when the ceiling recessed fan is in the cooling mode, the included angle a in the angle range of 10°≥a > 0°, and when a > 0°, the air deflector tilts upwards relative to the horizontal plane.

7. The ceiling recessed fan according to any of claims 3 to 6, wherein the air outlet assembly has a closed position to close the air outlet in cooperation with the main body frame, and the air deflector has a first edge and a second edge; and when the air outlet assembly is in the closed position, the first edge is sealed with a corresponding position of the main body frame, and the second edge is sealed with a corresponding edge of the air outlet frame.

8. The ceiling recessed fan according to claim 7, wherein when the air outlet assembly is in the closed position, the air outlet frame and the air deflector jointly cooperate with the main body frame to form a seal.

9. The ceiling recessed fan according to any of claims 2 to 8, wherein the air outlet assembly comprises an air outlet frame, the air outlet is formed between the air outlet frame and the main body frame, and the air outlet frame is lifted independently.

10. The ceiling recessed fan according to any of claims 2 to 9, wherein the air outlet assembly comprises an air outlet frame and an air return panel, the air outlet is formed between the air outlet frame and the main body frame, the air return panel is provided with an air return gate, and the air outlet frame and the air return panel are connected and lifted together.

11. A ceiling recessed fan, comprising: a main body frame internally provided with an air outlet duct, wherein the air outlet duct has a first end and a second end along an airflow direction; an air outlet assembly arranged in the main body frame in a way so as to be able to be raised and lowered, and having an operation position which descends to a predetermined height and forms an air outlet with the main body frame, wherein the air outlet communicates with a second end of the air outlet duct; when the air outlet assembly is in the operation position, the angle b between the air output direction of the air outlet and the air output direction of the air outlet duct is in the angle value of 130°≤b≤150°.

12. The ceiling recessed fan according to claim 11, wherein the air outlet assembly comprises an air deflector and an air outlet frame, the air outlet frame is arranged in the main body frame; the air deflector is swingably arranged on the air outlet frame; and when the air outlet assembly is in the operation position, the air deflector is capable of adjusting a height of the air outlet.

13. The ceiling recessed fan according to claim 12, wherein the ceiling recessed fan has a cooling mode, and when the ceiling recessed fan is in the cooling mode, the angle c between the plane where the air deflector is located and the air output direction of the air outlet duct is in the angle range of 120°≤c ≤140°.

14. The ceiling recessed fan according to claim 12, wherein the ceiling recessed fan has a heating mode, and when the ceiling recessed fan is in the heating mode, the angle c between the plane where the air deflector is located and the air output direction of the air outlet duct is in the angle range of 180°≤c ≤190°.

15. The ceiling recessed fan according to any of claims 12 to 14, wherein the air outlet assembly has a closed position to close the air outlet in cooperation with the main body frame, and the air deflector has a first edge and a second edge; and when the air outlet assembly is in the closed position, the first edge is sealed with a corresponding position of the main body frame, and the second edge is sealed with a corresponding edge of the air outlet frame.

16. The ceiling recessed fan according to claim 15, wherein the second edge is provided with a first step structure, and the air outlet frame is provided with a second step structure fit with the step structure, so that the first step structure can be sealingly fit with the second step structure.

17. The ceiling recessed fan according to claim 16, wherein the first step structure is provided with a seal, and when the first step structure is sealingly fit with the second step structure, the seal is located between the first step structure and the second step structure.

18. The ceiling recessed fan according to any of claims 12 to 17, wherein the ceiling recessed fan also comprises a swinging mechanism arranged on the air outlet assembly, and the air deflector is arranged on the swinging mechanism.

19. The ceiling recessed fan according to claim 18, wherein the swinging mechanism comprises a rotary arm, one end of which is hinged to the air outlet frame, and the other end of which is arranged on the air deflector.

20. The ceiling recessed fan according to claim 19, wherein the swinging mechanism also comprises a driving member arranged on the air outlet frame and directly or indirectly driving the rotary arm to rotate.

21. The ceiling recessed fan according to any of claims 11 to 20, wherein the air outlet assembly comprises an air outlet frame, an air outlet is formed between the air outlet frame and the main body frame, and the air outlet frame is lifted independently.

22. The ceiling recessed fan according to any of claims 11 to 21, wherein the air outlet assembly comprises an air outlet frame and an air return panel, an air outlet is formed between the air outlet frame and the main body frame, the air return panel is provided with an air return gate, and the air outlet frame and the air return panel are connected and lifted together.

23. The ceiling recessed fan according to any of claims 11 to 22, wherein the air outlet assembly is provided with at least one second air outlet communicating with a second end of the air outlet duct.

24. The ceiling recessed fan according to claim 23, wherein the ceiling recessed fan further comprises an air deflector rotatably arranged at the second air outlet and configured to close or open the second air outlet.

25. A ceiling recessed fan, comprising: a main body frame; an air outlet assembly arranged in the main body frame in a way so as to be able to be raised and lowered, and having an operation position which descends to a set height and forms an air outlet with the main body frame; the height h1 of the air outlet is in the range of 20mm≤h1≤36mm.

26. The ceiling recessed fan according to claim 25, wherein when the height h1 of the air outlet is in the range of 20mm≤h1≤36mm, the air output volume of the ceiling recessed fan is greater than or equal to 75% of a rated air output volume of the ceiling recessed fan.

27. The ceiling recessed fan according to claim 25 or 26, wherein the air outlet assembly comprises a rotatable air deflector, and the air deflector and the main body frame form the air outlet.

28. The ceiling recessed fan according to claim 27, wherein when the ceiling recessed fan is in a cooling mode, the comprised angle a between the plane where the air deflector is located and the horizontal plane is in the angle range of -10°≤a≤10°, and when a=0°, the plane where the air deflector is located is parallel to the horizontal plane.

29. The ceiling recessed fan according to claim 27 or 28, wherein the ceiling recessed fan also comprises a rotating mechanism arranged on the air outlet assembly, and the air deflector is arranged on the rotating mechanism.

30. The ceiling recessed fan according to claim 29, wherein the rotating mechanism comprises a rotary arm, one end of which is hinged to the air outlet assembly, and the other end of which is arranged on the air deflector.

31. The ceiling recessed fan according to claim 30, wherein the rotating mechanism also comprises a driving member arranged on the air outlet assembly and drivingly connected with the rotary arm.

32. The ceiling recessed fan according to any of claims 27 to 31, wherein the air outlet assembly comprises an air outlet frame, the air deflector is rotatably arranged on the air outlet frame, and a step sealing structure is provided between an edge of the air deflector and the air outlet frame.

33. The ceiling recessed fan according to claim 32, wherein the edge of the air deflector is provided with a first step structure, and the air outlet frame is provided with a second step structure, so that the first step structure and the second step structure are fit to form the step sealing structure.

34. The ceiling recessed fan according to claim 33, wherein a sealing member is provided between the first step structure and the second step structure.

35. The ceiling recessed fan according to any of claims 25 to 34, wherein the air outlet assembly comprises an air outlet frame, an air outlet is formed between the air outlet frame and the main body frame, and the air outlet frame is lifted independently.

36. The ceiling recessed fan according to any of claims 25 to 35, wherein the air outlet assembly comprises an air outlet frame and an air return panel, an air outlet is formed between the air outlet frame and the main body frame, the air return panel is provided with an air return gate, and the air outlet frame and the air return panel are connected and lifted together.

37. A ceiling recessed fan, comprising: a main body frame; an air outlet assembly arranged in the main body frame, wherein when the ceiling recessed fan is in a cooling mode, a height difference is formed between the air outlet assembly and the main body frame, and an air outlet is formed between the air outlet assembly and the main body frame; a first air deflector arranged at a swinging mechanism, and swingably arranged at the air outlet; the angle c between the plane where the first air deflector is located and a mounting planar face of the main body frame is in the range of -10°≤c≤10°, and when the angle c is 0°, the plane where the first air deflector is located is parallel to the mounting planar face; the air outlet assembly has a first descending height h, and when the ceiling recessed fan is in a cooling mode, the first descending height h is in the range of 20mm≤h≤36mm.

38. The ceiling recessed fan according to claim 37, wherein when the angle c is in the range of -10° ≤c<0°, the plane where the first air deflector is located tilts upward relative to the mounting planar face, and the first descending height h is in the range of 20mm≤h≤28mm; or when the angle c is in the range of 0°≤c<10°, the first descending height h is in the range of 20mm≤h≤36mm.

39. The ceiling recessed fan according to claim 37 or 38, wherein the air outlet assembly is arranged in the main body frame in a way so as to be able to be raised and lowered, and the air outlet assembly has an operation position descending to a set height to form the height difference.

40. The ceiling recessed fan according to any of claims 37 to 39, wherein the mounting planar face of the main body frame is parallel to the horizontal plane.

41. The ceiling recessed fan according to claim 39 or 40, wherein the first air deflector is provided with an extension plate projecting out of the first air deflector when the air outlet assembly is in the operation position.

42. The ceiling recessed fan according to any of claims 37 to 40, wherein the ceiling recessed fan also comprises an air deflection structure arranged in the main body frame, and capable of deflecting the air output of the air outlet when the ceiling recessed fan is in a cooling mode.

43. The ceiling recessed fan according to claim 42, wherein the main body frame comprises a side frame, at least part of the air output of the air outlet passes through the side frame, and the air deflecting structure comprises a second air deflector swingably arranged on the side frame; or the main body frame comprises a side frame, at least part of the air output of the air outlet passes through the side frame, and the side frame is formed with an air deflecting channel which constitutes the air deflecting structure.

44. The ceiling recessed fan according to any of claims 37 to 43, wherein the air outlet assembly comprises an air outlet frame, an air outlet is formed between the air outlet frame and the main body frame, and the air outlet frame is lifted independently.

45. The ceiling recessed fan according to any of claims 37 to 44, wherein the air outlet assembly comprises an air outlet frame and an air return panel, an air outlet is formed between the air outlet frame and the main body frame, the air return panel is provided with an air return gate, and the air outlet frame and the air return panel are connected and lifted together.

46. A ceiling recessed fan, comprising: a main body frame; an air outlet assembly arranged in the main body frame, wherein when the ceiling recessed fan is in a cooling mode, a height difference is formed between the air outlet assembly and the main body frame, and an air outlet is formed between the air outlet assembly and the main body frame; and a first air deflector arranged at a swinging mechanism, and swingably arranged at the air outlet; wherein the plane where the first air deflector is located tilts upward relative to a mounting planar face of the main body frame, and the angle c between the plane where the first air deflector is located and the mounting planar face is in the range of -10°≤c < 0°.

47. The ceiling recessed fan according to claim 46, wherein the air outlet assembly is arranged in the main body frame in a way so as to be able to be raised and lowered, and the air outlet assembly has an operation position descending to a set height to form the height difference.

48. A ceiling recessed fan with a cooling mode, comprising: a main body frame internally provided with an air outlet duct, wherein the air outlet duct has a first end and a second end along an airflow direction; an air outlet assembly arranged in the main body frame, wherein when the ceiling recessed fan is in a cooling mode, there is a height difference between the air outlet assembly and the main body frame, and an air outlet is formed between the air outlet assembly and the main body frame, and the air outlet communicates with a second end of the air outlet duct; the ratio of the height h1 of the air outlet to the width h2 of a first end of the air outlet duct is in the range of 1 / 3≤h1 / h2≤3 / 5.

49. The ceiling recessed fan according to claim 48, wherein the air outlet assembly is arranged in the main body frame in a way so as to be able to be raised and lowered, and the air outlet assembly comprises an operation position descending to a set height to form the height difference; and when the air outlet assembly is in the operation position, the range of the height h1 of the air outlet to the width h2 of a first end of the air outlet duct is in the range of 1 / 3≤h1 / h2≤3 / 5.

50. The ceiling recessed fan according to claim 48 or 49, wherein the air outlet assembly comprises an air deflector and an air outlet frame, the air outlet frame is arranged in the main body frame; the air deflector is rotatably arranged on the air outlet frame; and when the air outlet assembly is in the operation position, the air deflector is capable of adjusting a height of the air outlet.

51. The ceiling recessed fan according to claim 50, wherein the air deflector has a first position to allow the height h1 of the air outlet to reach a minimum value, and the ratio of the minimum height h1 of the air outlet to the width of a first end of the air outlet duct is in the range of 1 / 3≤h1 / h2≤3 / 5.

52. The ceiling recessed fan according to claim 50, wherein when the ceiling recessed fan is in a cooling mode, the comprised angle a between the plane where the air deflector is located and the horizontal plane is in the angle range of -10°≤a≤10°, and when a=0°, the plane where the air deflector is located is parallel to the horizontal plane.

53. The ceiling recessed fan according to claim 52, wherein when the ceiling recessed fan is in a cooling mode, the comprised angle a in the angle range of 10°≥a > 0°, and when a > 0°, the air deflector tilts upwards relative to the horizontal plane.

54. The ceiling recessed fan according to any of claims 50 to 53, wherein the air outlet assembly comprises a closed position to close the air outlet in cooperation with the main body frame, and the air deflector has a first edge and a second edge; and when the air outlet assembly is in the closed position, the first edge is sealed with a corresponding position of the main body frame, and the second edge is sealed with a corresponding edge of the air outlet frame.

55. The ceiling recessed fan according to claim 54, wherein when the air outlet assembly is in the closed position, the air outlet frame and the air deflector jointly cooperate with the main body frame to form a seal.

56. The ceiling recessed fan according to claim 54 or 55, wherein the second edge is provided with a first step structure, and the air outlet frame is provided with a second step structure fit with the first step structure, so that the first step structure is sealingly fit with the second step structure when the air outlet assembly is in the closed position.

57. The ceiling recessed fan according to claim 56, wherein the first step structure is provided with a seal, and when the air outlet assembly is in the closed position, the seal is arranged between the first step structure and the second step structure.

58. The ceiling recessed fan according to any of claims 49 to 57, wherein the ceiling recessed fan also comprises a lifting mechanism arranged in the main body frame, and the air outlet assembly is arranged on the lifting mechanism.

59. The ceiling recessed fan according to any of claims 49 to 58, wherein the air outlet assembly comprises an air outlet frame, an air outlet is formed between the air outlet frame and the main body frame, and the air outlet frame is lifted independently.

60. The ceiling recessed fan according to any of claims 49 to 59, wherein the air outlet assembly comprises an air outlet frame and an air return panel; an air outlet is formed between the air outlet frame and the main body frame, the air return panel is provided with an air return gate, and the air outlet frame and the air return panel are connected and lifted together.

61. The ceiling recessed fan according to any of claims 48 to 60, wherein the air outlet assembly comprises at least one second air outlet communicating with a second end of the air outlet duct.

62. The ceiling recessed fan according to claim 61, wherein the ceiling recessed fan further comprises an air deflector rotatably arranged at the second air outlet and configured to close or open the second air outlet.

63. A ceiling recessed fan with an air outlet, comprising: a main body frame internally provided with an air outlet duct, wherein the air outlet duct comprises a first end and a second end; and an air outlet assembly arranged in the main body frame in a way so as to be able to be raised and lowered, and descending to form an air outlet with the main body frame, wherein the air outlet communicates with a second end of the air outlet duct; the ratio of the circulation area S1 of the air outlet to the circulation area S2 of the first end is in the range of 0.7≤S1 / S2≤1.27.

64. The ceiling recessed fan according to claim 63, wherein the air outlet assembly comprises a rotatable air deflector, and the air deflector and the main body frame form the air outlet.

65. The ceiling recessed fan according to claim 64, wherein the ceiling recessed fan also comprises a rotating mechanism arranged on the air outlet assembly, and the air deflector is arranged on the rotating mechanism.

66. The ceiling recessed fan according to claim 65, wherein the rotating mechanism comprises a rotary arm, one end of which is hinged to the air outlet assembly, and the other end of which is arranged on the air deflector.

67. The ceiling recessed fan according to claim 64, wherein the air outlet assembly has a closed position to close the air outlet in cooperation with the main body frame, and the air deflector comprises a first edge and a second edge; and when the air outlet assembly is in the closed position, the first edge is sealed with a corresponding position of the main body frame, and the second edge is sealed with a corresponding edge of the air outlet assembly.

68. The ceiling recessed fan according to claim 67, wherein a sealing structure is provided between the second edge and the air outlet assembly.

69. The ceiling recessed fan according to any of claims 63 to 68, wherein the ceiling recessed fan also comprises a lifting mechanism arranged in the main body frame, and the air outlet assembly is arranged on the lifting mechanism.

70. The ceiling recessed fan according to any of claims 63 to 69, wherein the air outlet assembly comprises an air outlet frame, an air outlet is formed between the air outlet frame and the main body frame, and the air outlet frame is lifted independently.

71. The ceiling recessed fan according to any of claims 63 to 70, wherein the air outlet assembly comprises an air outlet frame and an air return panel, an air outlet is formed between the air outlet frame and the main body frame, the air return panel is provided with an air return gate, and the air outlet frame and the air return panel are connected and lifted together.

72. The ceiling recessed fan according to any of claims 63 to 71, wherein the air outlet assembly is provided with at least one second air outlet communicating with a second end of the air outlet duct.

73. The ceiling recessed fan according to claim 72, wherein the ceiling recessed fan further comprises an air deflector rotatably arranged at the second air outlet and configured to close or open the second air outlet.

74. A control method of a ceiling recessed fan, wherein the ceiling recessed fan comprises a main body frame and an air outlet assembly, the air outlet assembly is mounted on the main body frame, and a height difference is formed between the air outlet assembly and the main body frame to form a first air outlet; the air outlet assembly is also provided with a second air outlet, the control method comprising the steps of: judging whether a fast cooling condition is met; and controlling the first air outlet and the second air outlet to be opened at the same time when the judgment result is YES.

75. The control method according to claim 74, wherein the ceiling recessed fan further comprises: a lifting mechanism through which the air outlet assembly is mounted on the main body frame; the step of controlling the opening of the first air outlet comprises: controlling the lifting mechanism to drive the air outlet assembly to descend so as to open the first air outlet.

76. The control method according to claim 74 or 75, wherein a first air deflecting portion is provided between the air outlet assembly and the main body frame; the air outlet assembly is provided with a second air deflecting portion, controlling the opening of the first air outlet by controlling the opening of the first air deflecting portion; controlling the opening of the second air outlet by controlling the opening of the second air deflecting portion.

77. The control method according to any of claims 74 to 76, wherein the step of judging whether a fast cooling condition is met comprises: judging whether a fast cooling instruction is received or whether an indoor temperature is higher than a first preset temperature; judging that a fast cooling condition is satisfied if YES.

78. The control method according to any of claims 74 to 77, wherein after the step of controlling the first air outlet and the second air outlet to be opened at the same time, the control method further comprises: judging whether a fast cooling exit condition is met; controlling the second air outlet to be closed when the first air outlet remains opened if YES.

79. The control method according to claim 78, wherein the step of judging whether a fast cooling exit condition is met comprises: judging whether a fast cooling exit instruction is received, or judging whether an opening duration of the second air outlet reaches a first preset duration, or judging whether an indoor temperature is lower than a second preset temperature; judging that a fast cooling exit condition is met if YES.

80. The control method according to claim 79, wherein after the step of judging that a fast cooling exit condition is met and before controlling the second air outlet to be closed, the control method further comprises: controlling the second air outlet to be intermittently opened; controlling the second air outlet to be closed after a second preset duration.

81. A control apparatus of a ceiling recessed fan, for realizing the control method according to any of claims 74 to 80, wherein the control apparatus comprises: a first judging module configured to judge whether a fast cooling condition is met; and a first control module configured to control a first air outlet and a second air outlet to be opened at the same time when the judgment result is YES.

82. A ceiling recessed fan, comprising a main body frame and an air outlet assembly, wherein the air outlet assembly is mounted on the main body frame, and a height difference is formed between the air outlet assembly and the main body frame to form a first air outlet which outputs air horizontally; the air outlet assembly is also provided with a second air outlet which outputs air downwards, and the ceiling recessed fan further comprises the control apparatus according to claim 8.

83. A computer readable storage medium having a computer program stored thereon that, when executed by a processor, implements the control method according to any of claims 74 to 80.

84. A ceiling recessed fan, comprising a main body frame, an air outlet assembly and a lifting mechanism, wherein the air outlet assembly is connected to the main body frame through the lifting mechanism; wherein the main body frame is provided with a load-bearing member, and the air outlet assembly is provided with a lapped joint member configured to be movable relative to the load-bearing member; during the ascending process of the air outlet assembly, the load-bearing member is separated from the lapped joint member; when the air outlet assembly descends to an operation position, the lapped joint member is in lapped joint with the load-bearing member which bears at least part of the gravity of the air outlet assembly.

85. The ceiling recessed fan according to claim 84, wherein a movement stroke A of the lapped joint member is equal to a maximum descending height of the air outlet assembly.

86. The ceiling recessed fan according to claim 85, wherein a maximum lifting distance of the lifting mechanism is greater than a movement stroke of the lapped joint member.

87. The ceiling recessed fan according to claim 86, wherein the lifting mechanism comprises: a driving device arranged in the main body frame; a gear mounted on an output shaft of the driving device; and a rack fixedly connected with the air outlet assembly and meshed with the gear, wherein the driving device drives the air outlet assembly to ascend and descend by cooperation between the gear and the rack; a meshing length of the rack is equal to a maximum lifting distance of the lifting mechanism.

88. The ceiling recessed fan according to claim 87, wherein the lifting mechanism is mounted on the load-bearing member.

89. The ceiling recessed fan according to any of claims 84 to 88, wherein the load-bearing member comprises a load-bearing plate and a load-bearing step, wherein the load-bearing plate is connected with the main body frame, and the load-bearing step is connected with the load-bearing plate; the lapped joint member comprises a lapped joint plate and a lapped joint step, wherein the lapped joint plate is connected with the air outlet assembly, and the lapped joint step is connected with the lapped joint plate; during the ascending process of the air outlet assembly, the lap jointed step ascends away from the load-bearing step; when the air outlet assembly descends to an operation position, the lap jointed step descends and is in lapped joint with the load-bearing step.

90. The ceiling recessed fan according to claim 89, wherein the bearing plate has a first side surface and a second side surface that are oppositely arranged; the load-bearing step is formed on the first side surface, and the lifting mechanism is mounted on the second side surface.

91. The ceiling recessed fan according to claim 89 or 90, wherein the cross-sectional shape of the load-bearing member is C-shaped, and the cross-sectional shape of the lapped joint member is L-shaped or T-shaped.

92. The ceiling recessed fan according to any of claims 84 to 91, wherein the air outlet assembly comprises an air outlet frame, an air outlet is formed between the air outlet frame and the main body frame, and the air outlet frame is lifted independently.

93. The ceiling recessed fan according to any of claims 84 to 92, wherein the air outlet assembly comprises an air outlet frame and an air return panel, a first air outlet is formed between the air outlet frame and the main body frame, the air return panel is provided with an air return gate, and the air outlet frame and the air return panel are connected and lifted together.

94. A recessed air conditioner with a transmission mechanism, comprising a main body frame, an air outlet assembly and a lifting mechanism, wherein the air outlet assembly is connected to the main body frame through the lifting mechanism, wherein the lifting mechanism comprises: a driving device; a transmission mechanism connected with the air outlet assembly and drivingly connected with the driving device, wherein the drive device drives the air outlet assembly to ascend and descend through the transmission mechanism; the transmission mechanism comprises a guiding portion; and a guiding mechanism, wherein the guiding mechanism and the guiding portion are movable relative to each other in a lifting direction of the air outlet assembly, and at the same time, the guiding mechanism is in limiting fit with the guiding portion in a horizontal direction.

95. The recessed air conditioner according to claim 94, wherein the guiding mechanism comprises a guiding unit having two guiding members arranged oppositely, a guiding channel is formed between the two guiding members, and the guiding portion is located in the guiding channel.

96. The recessed air conditioner according to claim 95, wherein there are a plurality of the guiding units arranged at intervals along a lifting direction of the air outlet assembly.

97. The recessed air conditioner according to claim 95 or 96, wherein the transmission mechanism comprises: a gear mounted on an output shaft of the driving device; and a rack fixedly connected with the air outlet assembly and meshed with the gear, wherein the driving device drives the air outlet assembly to ascend and descend by cooperation between the gear and the rack; and the guiding portion is located on the rack.

98. The recessed air conditioner according to claim 97, wherein the guiding portion is a guiding column on the rack, and the two opposite guiding members are provided with guiding grooves matched with the guiding columns, and the guiding columns are clamped between the two guiding members through the guiding grooves.

99. The recessed air conditioner according to claim 97 or 98, wherein the first side of the rack is provided with a meshing tooth, the second side is provided with a guiding portion, and the rack is provided with a mounting groove located between the meshing tooth and the guiding portion; the two guiding members of the guiding unit are located on both sides of the guiding portion respectively, and one of the guiding members of the guiding unit is located in the mounting groove.

100. The recessed air conditioner according to claim 99, wherein the extension direction of the mounting groove is the lifting direction of the air outlet assembly, and the mounting groove has a first end wall located above and a second end wall located below along a lifting direction of the air outlet assembly, and the maximum distance between the first end wall and the guiding unit is equal to a maximum descending height of the air outlet assembly.

101. The recessed air conditioner according to any of claims 95 to 100, wherein the guiding member comprises a slider in sliding fit with the guiding portion and / or a roller in rolling fit with the guiding portion.

102. The recessed air conditioner according to any of claims 94 to 100, wherein the guiding mechanism comprises: two guiding units arranged at intervals along a lifting direction of the air outlet assembly, wherein the guiding unit and the guiding portion are in sliding fit in a lifting direction of the air outlet assembly, and at the same time, the guiding mechanism and the guiding portion are in limiting fit in a horizontal direction; for a maximum descending height B of the air outlet assembly and a spacing distance C between the two guiding units 61i, the ratio of B / C is in the range of 1:1 to 4:1.

103. The recessed air conditioner according to claim 102, wherein the transmission mechanism comprises: a gear mounted on an output shaft of the driving device; a rack fixedly connected with the air outlet assembly and meshed with the gear, wherein the driving device drives the air outlet assembly to ascend and descend by cooperation between the gear and the rack; and the guiding portion is located on the rack; for a length A of the rack along a lifting direction of the air outlet assembly, the ratio of A / C is in the range of 2:1 to 5:1.

104. The recessed air conditioner according to any of claims 94 to 103, wherein the air outlet assembly comprises an air outlet frame, an air outlet is formed between the air outlet frame and the main body frame, and the air outlet frame is lifted independently.

105. The recessed air conditioner according to any of claims 94 to 104, wherein the air outlet assembly comprises an air outlet frame and an air return panel, an air outlet is formed between the air outlet frame and the main body frame, the air return panel is provided with an air return gate, and the air outlet frame and the air return panel are connected and lifted together.

106. The recessed air conditioner according to any of claims 94 to 105, wherein the lifting mechanism further comprises: a mounting box arranged in the main body frame, wherein the transmission mechanism and the guiding mechanism are mounted in the mounting box.

107. The recessed air conditioner according to claim 106, wherein the mounting box comprises: a box body fixedly connected with the main body frame; and a box cover detachably arranged on the box body.

108. The recessed air conditioner according to claim 107, wherein the driving device is arranged outside the mounting box, and the output shaft of the electric motor passes through the inside of the mounting box.

109. The recessed air conditioner according to any of claims 94 to 108, wherein the air outlet assembly descends to form an air supply duct with the main body frame, so that one end of the air supply duct forms a first air outlet, and the other end of the air supply duct communicates with an air outlet duct of the recessed air conditioner.

110. The recessed air conditioner according to claim 109, wherein the air outlet assembly is also provided with at least one second air outlet communicating with an air outlet duct of the recessed air conditioner.

111. The recessed air conditioner according to claim 110, wherein the air outlet assembly is provided with an air deflector located at the position of the first air outlet and / or the second air outlet.

112. The recessed air conditioner according to any of claims 109 to 111, wherein the main body frame further comprises a side frame, and when the air outlet assembly descends to form a first air outlet with the main body frame, the air supply duct is formed between the air outlet assembly and the side frame, and the projection of the air outlet assembly at least partially coincides with the projection of the side frame on a mounting planar face of the main body frame.

113. A ceiling recessed fan with an air supply duct, comprising: a main body frame internally formed with an air outlet duct; and an air outlet assembly arranged in the main body frame in a way so as to be able to be raised and lowered, and descending to form a first air outlet with the main body frame; the air outlet assembly comprises at least one second air outlet communicating with the air outlet duct.

114. The ceiling recessed fan according to claim 113, wherein when the air outlet assembly descends to form a first air outlet with the main body frame, a gap is formed between the air outlet assembly and the main body frame, so that the gap forms an air supply duct, one end of which communicates with the air outlet duct, and the other end of which forms the first air outlet.

115. The recessed air conditioner according to claim 114, wherein the main body frame further comprises a side frame; and when the air outlet assembly descends to form a first air outlet with the main body frame, the air supply duct is formed between the air outlet assembly and the side frame, and the projection of the air outlet assembly at least partially coincides with the projection of the side frame on a mounting planar face of the main body frame.

116. The ceiling recessed fan according to any of claims 113 to 115, wherein the ceiling recessed fan further comprises an air deflector rotatably arranged at the second air outlet and configured to close or open the second air outlet.

117. The ceiling recessed fan according to any of claims 113 to 116, wherein the ceiling recessed fan also comprises at least two partition plates, all the partition plates are arranged in the air outlet duct, and a flow channel is formed between the two adjacent partition plates.

118. The ceiling recessed fan according to any of claims 113 to 117, wherein the ceiling recessed fan also comprises a lifting mechanism arranged in the main body frame, and the air outlet assembly is arranged on the lifting mechanism; the lifting mechanism comprises: a driving device; a transmission mechanism connected with the air outlet assembly and drivingly connected with the driving device, wherein the drive device drives the air outlet assembly to ascend and descend through the transmission mechanism; the transmission mechanism comprises a guiding portion; and a guiding mechanism, wherein the guiding mechanism and the guiding portion are movable relative to each other in a lifting direction of the air outlet assembly, and the guiding mechanism is in limiting fit with the guiding portion in a horizontal direction.

119. The ceiling recessed fan according to claim 118, wherein the guiding mechanism comprises a guiding unit having two guiding members arranged oppositely, a guiding channel is formed between the two guiding members, and the guiding portion is located in the guiding channel.

120. The ceiling recessed fan according to claim 119, wherein the transmission mechanism comprises: a gear mounted on an output shaft of the driving device; and a rack fixedly connected with the air outlet assembly and meshed with the gear, wherein the driving device drives the air outlet assembly to ascend and descend by cooperation between the gear and the rack; and the guiding portion is located on the rack.

121. The ceiling recessed fan according to claim 120, wherein the guiding portion is a guiding column on the rack, and the two opposite guiding members are provided with guiding grooves matched with the guiding columns, and the guiding columns are clamped between the two guiding members through the guiding grooves.

122. The ceiling recessed fan according to claim 121, wherein the first side of the rack is provided with a meshing tooth, the second side is provided with a guiding portion, and the rack is provided with a mounting groove located between the meshing tooth and the guiding portion; the two guiding members of the guiding unit are located on both sides of the guiding portion respectively, and one of the guiding members of the guiding unit is located in the mounting groove.

123. The ceiling recessed fan according to claim 122, wherein the extension direction of the mounting groove is the lifting direction of the air outlet assembly, and the mounting groove has a first end wall located above and a second end wall located below along a lifting direction of the air outlet assembly, and the maximum distance between the first end wall and the guiding unit is equal to a maximum descending height of the air outlet assembly.

124. The ceiling recessed fan according to any of claims 113 to 123, wherein the comprised angle β between the air output direction of the first air outlet and the horizontal plane is in the angle range of -20°≤β≤45°; when β=0°, the air output direction of the first air outlet is parallel to the horizontal direction; and when β>0°, the air output direction of the first air outlet tilts upwards relative to the horizontal direction.

125. The ceiling recessed fan according to claim 124, wherein the comprised angle β between the air output direction of the first air outlet and the horizontal plane is in the angle range of 0°≤β≤30°; and when β>0°, the air output direction of the first air outlet tilts upwards relative to the horizontal direction.

126. The ceiling recessed fan according to any of claims 113 to 125, wherein the air outlet assembly has a first descending height L1 in the value range of 15mm≤L1≤60mm.

127. The ceiling recessed fan according to claim 126, wherein the air outlet assembly comprises a first descending height L1 in the value range of 20mm≤L1≤50mm.

128. The ceiling recessed fan according to any of claims 113 to 127, wherein the ceiling recessed fan comprises a first air output mode, a second air output mode and a third air output mode; when the ceiling recessed fan is in the first air output mode, the first air outlet is open, and the second air outlet is closed; when the ceiling recessed fan is in the second air output mode, the first air outlet is open, and some or all the second air outlets are open; when the ceiling recessed fan is in the third air output mode, the first air outlet is closed, and some or all the second air outlets are open.

129. The ceiling recessed fan according to claim 128, wherein when the ceiling recessed fan is in a cooling mode, the ceiling recessed fan is in a first air output mode or the second air output mode; when the ceiling recessed fan is in a heating mode, the ceiling recessed fan is in a third air output mode or the second air output mode.

130. The recessed air conditioner according to any of claims 114 to 129, wherein the main body frame comprises a side frame; and when the air outlet assembly descends to form a first air outlet with the main body frame, the air supply duct is formed between the air outlet assembly and the side frame, the part of the side frame for forming the air supply duct is arranged obliquely relative to a horizontal plane; and / or, the part of the air outlet assembly for forming the air supply duct is arranged obliquely relative to a horizontal plane.

131. The ceiling recessed fan according to claim 130, wherein the tilting angle a formed between the part of the side frame for forming the air supply duct and a horizontal plane is in the angle range of - 20°≤a≤45°, and when a=0°, the part of the side frame for forming the air supply duct is parallel to a horizontal direction, and when a>0°, the part of the side frame for forming the air supply duct tilts upward relative to the horizontal plane; and / or, the tilting angle a formed between the part of the air outlet assembly for forming the air supply duct and a horizontal plane is in the angle range of -20°≤b≤45°, and when b=0°, the part of the air outlet assembly for forming the air supply duct is parallel to a horizontal direction, and when b>0°, the part of the air outlet assembly for forming the air supply duct tilts upward relative to a horizontal plane.

132. The recessed air conditioner according to any of claims 113 to 131, wherein the air outlet duct has a first end and a second end along an airflow direction, the first air outlet and the second air outlet both communicate with the second end, and the ratio of the width D1 of the first end to the width D2 of the second air outlet is in the range of 0.75≤D2 / D1≤0.85.

133. The ceiling recessed fan according to any of claims 113 to 132, wherein the air outlet assembly comprises an air outlet frame, which is lifted independently.

134. The ceiling recessed fan according to any of claims 113 to 133, wherein the air outlet assembly comprises an air outlet frame and an air return panel, the air return panel comprises an air return gate, and the air outlet frame and the air return panel are connected and lifted synchronously.

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