Air conditioner indoor unit

Abstract

The utility model provides a kind of air conditioner indoor unit, it is related to air conditioning field.Air conditioner indoor unit includes cabinet machine body and air supply component.Air supply component includes air guide piece and axial flow fan blade.Air guide piece has air guide passage and the air inlet side of air guide passage and the air outlet side of air guide passage are located in air inlet face and air outlet face.Cabinet machine body is provided with heat exchanger, air guide piece is set in cabinet machine body, and air inlet face corresponds with heat exchanger.Air guide passage includes air guide section, transition section and ventilation section connected in sequence.Among them, air guide section is close to air inlet face, and ventilation section is close to air outlet face.Axial flow fan blade is installed in air guide passage, and the projection of the leading edge blade root point of all blades of axial flow fan blade in perpendicular axial flow fan blade axis direction falls in the area of transition section.It can improve the problem of air volume loss caused by air leakage from high pressure side to low pressure side in air supply process.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, and more specifically, to an indoor unit for an air conditioner. Background Technology

[0002] Axial flow cabinet air conditioners mainly consist of axial flow fans, evaporators, control panels, and compressors. They feature large air volume and long air delivery distance, enabling rapid air circulation and cooling.

[0003] In existing technologies, to achieve better air delivery, axial flow air conditioner indoor units typically have air guide rings at the air outlets to guide airflow, making the airflow more concentrated, optimizing the air guiding effect, and effectively avoiding the problem of short circuits between the fan's inlet and outlet air fields. At the same time, the air guide rings can also rectify the outlet airflow and reduce the noise during fan operation.

[0004] However, the axial fan blades of existing axial-flow cabinet air conditioner fans are generally installed outside the air guide ring, which causes airflow to leak from the high-pressure side to the low-pressure side, resulting in air volume loss. Utility Model Content

[0005] The purpose of this utility model is to provide an air conditioner indoor unit that can improve the problem of air volume loss caused by air leakage from the high-pressure side to the low-pressure side during the air supply process of the air conditioner indoor unit.

[0006] The embodiments of this utility model can be implemented as follows: This utility model provides an air conditioner indoor unit, which includes a cabinet body and an air supply component; The air supply assembly includes an air guide and an axial flow fan blade; The air guide has an air guide channel, an air inlet surface located on the air inlet side of the air guide channel, and an air outlet surface located on the air outlet side of the air guide channel. A heat exchanger is installed inside the cabinet body, the air guide is installed in the cabinet body, and the air inlet surface corresponds to the heat exchanger. The air guide channel includes an air guide section, a transition section, and a ventilation section connected in sequence; wherein, the air guide section is close to the air inlet surface, and the ventilation section is close to the air outlet surface; The axial flow fan blades are installed in the air guide channel, and the projection of the leading edge root points of all blades of the axial flow fan blades in the direction perpendicular to the axis of the axial flow fan blades falls into the area of ​​the transition section.

[0007] This application improves the airflow loss caused by air leakage from the high-pressure side to the low-pressure side during air supply by installing axial flow fan blades in the air guide channel and ensuring that the projection of the leading edge root point of all axial flow fan blades in the direction perpendicular to the axial flow fan axis falls within the transition section area. This allows the blades to extend partly into the ventilation section and partly into the air guide section. Secondly, it can also improve the air supply capacity and increase the air collection range. Furthermore, it ensures that the airflow exiting the air guide section can be immediately and unobstructedly captured and used for work by the leading edge of the axial flow fan blades, avoiding airflow separation and vortices between the air guide section outlet and the fan blade inlet.

[0008] In an optional embodiment, the thickness of all blades of the axial flow fan in the axial direction of the axial flow fan is H1, and the distance between the air inlet surface and the air outlet surface is H2, where H1 = C * H2. The value of C ranges from 0.6 to 0.9.

[0009] This application sets the value of C to be between 0.6 and 0.9, giving the blades higher structural strength and natural frequency, effectively resisting airflow excitation forces during operation, preventing resonance and fatigue damage, and making operation safer and more reliable. This setting also ensures that the axial flow fan blades can be completely contained within the air guide channel.

[0010] In an optional embodiment, the thickness of all blades of the axial flow fan in the axial direction is H1, and the distance between the two ends of the leading edge of the blades in the axial direction is [missing information]. H, H = A * H1; The value of A ranges from 0.35 to 0.45.

[0011] This application sets the value of A to a range of 0.35 to 0.45. This installation method allows the leading edge of the blade to guide and control the airflow from the guide section earlier, making it turn more smoothly and wrap around the blade. This can improve the problem of airflow separation at the root of the blade pressure surface, and also reduce noise and improve air delivery efficiency.

[0012] In an optional embodiment, the distance between the air inlet surface and the air outlet surface is H2, and the distance between the surface where the leading edge root points of all blades of the axial flow fan are located and the air outlet surface is L1, where L1 = N * H2. The value of N ranges from 0.5 to 0.6.

[0013] This application sets the value of N to be between 0.5 and 0.6, which can ensure that the leading edge of the axial fan blade can fully draw in the airflow from the guide section, provide sufficient stable space for the airflow at the rear of the axial fan blade before it is discharged, and also achieve a balance between airflow and noise.

[0014] In an optional embodiment, the distance between the trailing edge root point of all blades of the axial flow fan and the air outlet surface is L2, and the distance between the air inlet surface and the air outlet surface is H2, where L2 = M * H2. The value of M ranges from 0.15 to 0.2.

[0015] This application sets the value of M to be between 0.15 and 0.2, thereby ensuring that the air guide component has a relatively optimal air guide distance while the length of the air guide channel is relatively shorter, thus saving space. It also allows for stable airflow discharge.

[0016] In an optional embodiment, the diameter of the air guide channel outlet side is D2, and the diameter of the axial flow fan blade is D1, where D1 = B * D2; The value of B ranges from 0.95 to 0.99.

[0017] This application sets the value of B to be between 0.95 and 0.99, which makes the gap between the blade tip and the inner wall of the ventilation section smaller, effectively improving the leakage of airflow from the high-pressure side to the low-pressure side through the blade tip, reducing air volume loss and significantly increasing wind pressure, and reducing high-frequency noise.

[0018] In an optional embodiment, the distance between the leading edge root point of all blades of the axial flow fan and the air outlet surface is equal to the length of the ventilation section.

[0019] In this embodiment, the distance between the leading edge root point of all axial fan blades and the outlet surface is set to be equal to the length of the ventilation section. This further improves the problem of airflow loss caused by leakage from the high-pressure side to the low-pressure side during air supply. It ensures that the airflow has a stable and smooth transition within the ventilation section after being accelerated and rectified by the axial fan blades.

[0020] In an optional embodiment, the air supply assembly further includes a mesh cover disposed on the outlet side of the air guide; The mesh cover and the air outlet side of the air guide channel are provided with spiral guide ribs; The spiral direction of the guide rib is opposite to the spiral direction of the blade of the axial flow fan.

[0021] This application uses a guide rib with a spiral direction opposite to that of the axial fan blade. The guide rib can apply a reverse torque to the rotating airflow delivered by the axial fan blade, which can effectively eliminate the rotational component of the airflow and convert it into a straight axial wind, thus enabling long-distance air delivery.

[0022] In an optional embodiment, the side length of the mesh cover is L, and the diameter of the axial flow fan blade is D1, where L = Z * D1; The value of Z ranges from 1.03 to 1.05.

[0023] This application sets the value of Z to be between 1.03 and 1.05. The slightly enlarged flow area relative to the air outlet side of the air guide channel can prevent the mesh cover itself from creating new constraints on the airflow, which would lead to increased back pressure and efficiency loss.

[0024] In an optional embodiment, the air inlet of the air guide channel is elliptical, and the major axis of the ellipse is parallel to the height direction of the cabinet body, and the minor axis is parallel to the width direction of the cabinet body. The ventilation section has a circular cross-section, and the cross-section of the air guide section gradually changes from an ellipse to a circle to correspond with the ventilation section.

[0025] This application sets the air inlet of the air guide channel to a vertical ellipse, which can increase the air collection range of the axial flow fan blades. The gradual transition from the elliptical inlet to the circular transition section can guide the airflow from a large area to a circular rotating airflow suitable for the operation of the axial flow fan blades. This greatly reduces the eddies and energy loss caused by the rapid contraction of the airflow, and can reduce noise and improve air supply efficiency. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a cross-sectional view of the air conditioner provided in this embodiment; Figure 2 This is a schematic diagram of the air supply assembly provided in this embodiment; Figure 3 This is a cross-sectional axonometric view of the air supply assembly provided in this embodiment; Figure 4 This is a cross-sectional view of the air supply assembly provided in this embodiment; Figure 5 This is a schematic diagram of the main structure of the air supply component provided in this embodiment.

[0028] Icons: 100-Air supply assembly; 110-Air guide; 111-Air guide duct; 112-Air inlet surface; 113-Air outlet surface; 114-Air guide section; 115-Ventilation section; 116-Transition section; 130-Axial fan blade; 131-Blade; 150-Grate; 151-Air guide rib; 152-Air supply area; 170-Drive motor; 190-Motor mounting bracket; 300-Indoor air conditioner unit; 310-Cabinet unit body; 311-Mounting cavity; 312-Indoor air inlet; 313-Indoor air outlet; 330-Heat exchanger. Detailed Implementation

[0029] However, the axial fan blades of existing axial-flow cabinet air conditioner fans are generally installed outside the air guide ring, which causes airflow to leak from the high-pressure side to the low-pressure side, resulting in air volume loss.

[0030] To address the aforementioned problems, this utility model provides an indoor air conditioning unit that can improve the airflow loss caused by air leakage from the high-pressure side to the low-pressure side during the air supply process.

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0033] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0034] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0035] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0036] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0037] The following describes in detail the overall structure, working principle, and technical effects of the air supply component and air conditioner provided by this utility model through embodiments and in conjunction with the accompanying drawings.

[0038] Please refer to Figure 1 This utility model provides an air conditioner indoor unit 300, which is a cabinet-type axial flow indoor unit. The air conditioner indoor unit 300 can deliver air to the room and thus regulate the indoor air.

[0039] Please refer to Figure 1 In this embodiment, the indoor unit 300 of the air conditioner includes a cabinet body 310 and an air supply assembly 100. A heat exchanger 330 is disposed inside the cabinet body 310, and the air supply assembly 100 is disposed inside the cabinet body 310 and corresponds to the heat exchanger 330. The air supply assembly 100 can deliver the air that has exchanged heat with the heat exchanger 330 to the room to regulate the indoor air.

[0040] The air conditioning indoor unit 300 provided in this embodiment is equipped with an air supply component 100 corresponding to the heat exchanger 330. The air supply component 100 can efficiently and stably deliver the air processed by the heat exchanger 330 to the indoor space.

[0041] Please refer to Figures 1 to 4 In this embodiment, the cabinet body 310 has a mounting cavity 311, an indoor air inlet 312 located on the back of the cabinet body 310 and communicating with the mounting cavity 311, and an indoor air outlet 313 disposed on the front of the cabinet body 310. A heat exchanger 330 is disposed within the mounting cavity 311 and corresponding to the indoor air inlet 312. An air supply assembly 100 is disposed between the indoor air outlet 313 and the heat exchanger 330.

[0042] Please refer to Figures 1 to 4In this embodiment, the air supply assembly 100 includes an air guide 110 and an axial flow fan blade 130. The air guide 110 has an air guide channel 111, an air inlet surface 112 located on the air inlet side of the air guide channel 111, and an air outlet surface 113 located on the air outlet side of the air guide channel 111. One side of the air inlet surface 112 of the air guide 110 is correspondingly disposed with respect to the heat exchanger 330. The air guide channel 111 includes a guide section 114, a transition section 116, and a ventilation section 115 connected in sequence. The guide section 114 is close to the air inlet surface 112, and the ventilation section 115 is close to the air outlet surface 113. The axial flow fan blade 130 is installed in the air guide channel 111, and the projection of the leading edge root points of all blades 131 of the axial flow fan blade 130 in the direction perpendicular to the axis of the axial flow fan blade 130 falls within the area of ​​the transition section 116. In this embodiment, by installing the axial flow fan blade 130 in the air guide channel 111, and ensuring that the projection of the leading edge root points of all blades 131 of the axial flow fan blade 130 in the direction perpendicular to the axis of the axial flow fan blade 130 falls within the area of ​​the transition section 116, the blades 131 extend partly to the ventilation section 115 and partly to the air guide section 114, thereby improving the problem of airflow loss caused by air leakage from the high-pressure side to the low-pressure side during air supply. Secondly, it can also improve the air supply capacity and increase the air collection range. Furthermore, it ensures that the airflow exiting the air guide section 114 can be immediately and unobstructedly captured and used for work by the leading edge of the blades 131 of the axial flow fan blade 130, avoiding airflow separation and vortices between the outlet of the air guide section 114 and the fan blade inlet.

[0043] It should be noted that blade 131 is a single aerodynamic component of axial flow fan blade 130. The leading edge is the edge of blade 131 that first "cuts into" the air and contacts the incoming flow when rotating. The leading edge root point is the innermost endpoint where the leading edge curve of blade 131 connects with the hub, that is, the starting point where the root of blade 131 begins to "cut into" the air. Connecting these points of all blades 131 forms a theoretical plane perpendicular to the axis of axial flow fan blade 130, and this theoretical plane is the surface where the leading edge root points of all blades 131 of axial flow fan blade 130 are located. The projection of the leading edge root points of all blades 131 of the axial flow fan 130 onto the area of ​​the transition section 116 in the direction perpendicular to the axis of the axial flow fan 130 can be understood as the projection of the leading edge root points of all blades 131 of the axial flow fan 130 onto the area of ​​the transition section 116 in the radial direction of the axial flow fan 130. It can also be understood as establishing a projection plane through the axis of the axial flow fan (130) (e.g., ...). Figure 4 As shown in the cross section, when all the leading edge root points of the blades 131 of the axial flow fan 130 and the transition section are projected onto the projection plane, the projection points of all the leading edge root points of the blades 131 of the axial flow fan 130 fall into the projection area of ​​the transition section.

[0044] It should also be noted that the transition section 116 is a section formed by rounding corners between the air guide section 114 and the ventilation section 115 for a smooth transition, and is generally shorter in length in the axial direction.

[0045] In this embodiment, the thickness of all blades 131 of the axial flow fan 130 along the axial direction of the axial flow fan 130 is H1, and the distance between the air inlet surface 112 and the air outlet surface 113 is H2, where H1 = C * H2. The value of C ranges from 0.6 to 0.9.

[0046] In this embodiment, the value of C is set to be between 0.6 and 0.9, which gives the blade 131 higher structural strength and natural frequency, effectively resisting the airflow excitation force during operation, preventing resonance and fatigue damage, and making operation safer and more reliable. This setting also ensures that the axial flow fan blade 130 can be completely contained within the air guide channel 111.

[0047] In one embodiment of this application, H1 is 100 mm. Of course, in other embodiments of this application, the value of H1 can be adaptively adjusted according to the value of C, which can be arbitrarily selected within the range of 0.6 to 0.9, including the endpoint values ​​of 0.6 and 0.9. Please refer to... Figures 1 to 4 In this embodiment, the thickness of all blades 131 of the axial flow fan 130 along the axial direction of the axial flow fan 130 is H1, and the distance between the two ends of the leading edge of the blades 131 of the axial flow fan 130 along the axial direction of the axial flow fan 130 is H1. H, H = A * H1. Where A ranges from 0.35 to 0.45.

[0048] In this embodiment, by setting the value of A to the range of 0.35 to 0.45, this installation method allows the leading edge of the blade 131 to guide and control the airflow from the guide section 114 earlier, making it turn more smoothly and wrap around the blade 131. This can improve the problem of airflow separation at the root of the pressure surface of the blade 131, and also reduce noise and improve air delivery efficiency.

[0049] It should be noted that the thickness H1 of all blades 131 of the axial flow fan 130 along the axial direction refers to the total theoretical space occupied by all blades 131 of the axial flow fan 130 along the axial direction. It is a distance defined axially by two specific, parallel virtual cross-sections. These two cross-sections are the front cross-section and the rear cross-section. The front cross-section is a plane perpendicular to the axis of the axial flow fan 130, and this plane is tangent to the front side of all blades 131. The rear cross-section is also a plane perpendicular to the axis of the axial flow fan 130, and this plane is tangent to the rear side of all blades 131. In terms of projection, H1 is the vertical distance between the two furthest points in the axial direction of the outline of all blades 131 of the entire axial flow fan 130 projected along the meridional plane of the axial flow fan 130. The distance between the two ends of the leading edge of the blades 131 of the axial flow fan 130 along the axial direction of the axial flow fan 130 is also mentioned. H can also be understood as the distance between the plane containing the leading edge and root point of the leaf blade and the anterior lateral section.

[0050] In one embodiment of this application, the value of A is 0.4. Of course, in other embodiments of this application, the value of A can also be adaptively adjusted to be arbitrarily selected in the range of 0.35 to 0.45, including the endpoint values ​​of 0.35 and 0.45.

[0051] Furthermore, the distance between the air inlet surface 112 and the air outlet surface 113 is H2, and the distance between the leading edge root point of all blades 131 of the axial flow fan 130 and the air outlet surface 113 is L1, where L1 = N * H2. The value of N ranges from 0.5 to 0.6.

[0052] In this embodiment, the value of N is set to be between 0.5 and 0.6, which can ensure that the leading edge of the axial fan blade 130 can fully draw in the airflow from the guide section 114, and also provide sufficient stable space for the airflow at the rear of the axial fan blade 130 before it is discharged, and can also achieve a balance between airflow and noise.

[0053] In one embodiment, N is 0.54 and H2 is 130 mm, with H2 being approximately 0.3 times the thickness of the cabinet body 310. Of course, in other embodiments of this application, the value of N can be adaptively adjusted to be arbitrarily selected within the range of 0.5 to 0.6, including the endpoint values ​​of 0.5 and 0.6.

[0054] Please refer to Figures 1 to 4 In this embodiment, the distance between the trailing edge root point of all blades 131 of the axial flow fan 130 and the air outlet surface 113 is L2, and the distance between the air inlet surface 112 and the air outlet surface 113 is H2, where L2 = M * H2. The value of M ranges from 0.15 to 0.2.

[0055] In this embodiment, the value of M is set to be between 0.15 and 0.2, which allows for a shorter length of the air guide channel 111 while ensuring that the air guide component 110 has a relatively optimal air guide distance, thus saving space. It also allows for stable airflow discharge.

[0056] It should be noted that the trailing edge is the edge on blade 131 where the airflow finally exits. The trailing edge root point is the intersection of the trailing edge curve of blade 131 and the hub. The plane containing the trailing edge root points of all blades 131 is the plane containing the trailing edge root points of each blade 131, which is perpendicular to the axis of the axial flow fan blade 130.

[0057] In one embodiment of this application, the value of M is set to 0.17. Of course, in other embodiments of this application, the value of M can also be adaptively adjusted to be arbitrarily selected in the range of 0.15 to 0.2, including the endpoint values ​​of 0.15 and 0.2.

[0058] Please refer to Figures 1 to 4 In this embodiment, the diameter of the outlet side of the air guide duct 111 is D2, and the diameter of the axial flow fan 130 is D1, where D1 = B * D2. The value of B ranges from 0.95 to 0.99.

[0059] In this embodiment, the value of B is set to be between 0.95 and 0.99. This makes the gap between the blade tip of the blade 131 and the inner wall of the ventilation section 115 smaller, which can effectively improve the leakage of airflow from the high-pressure side to the low-pressure side through the blade tip. This can reduce air volume loss and significantly increase wind pressure, and can also reduce high-frequency noise.

[0060] In one embodiment of this application, the value of B is 0.97. Of course, in other embodiments of this application, the value of B can also be adaptively adjusted to be arbitrarily selected in the range of 0.95 to 0.99, including the endpoint values ​​of 0.95 and 0.99.

[0061] Please refer to Figures 1 to 4 Furthermore, the distance between the leading edge root point of all blades 131 of the axial flow fan 130 and the air outlet surface 113 is equal to the length of the ventilation section 115.

[0062] In this embodiment, the distance between the leading edge root point of all blades 131 of the axial flow fan 130 and the air outlet surface 113 is set to be equal to the length of the ventilation section 115. This further improves the problem of airflow loss caused by air leakage from the high-pressure side to the low-pressure side during air supply. It ensures that the airflow can have a stable and smooth transition within the ventilation section 115 after being accelerated and rectified by the axial flow fan 130.

[0063] Please refer to Figures 1 to 4In this embodiment, the air inlet of the air guide channel 111 is elliptical, with the major axis of the ellipse parallel to the height direction of the cabinet body 310 and the minor axis parallel to the width direction of the cabinet body 310. The cross-section of the ventilation section 115 is circular, and the cross-section of the air guide section 114 gradually changes from elliptical to circular to correspond to the ventilation section 115.

[0064] In this embodiment, the air inlet of the air guide channel 111 is set to a vertical ellipse, which can increase the air collection range of the axial flow fan blade 130. The gradual transition from the elliptical inlet to the circular transition section can guide the airflow from a large area to a circular rotating airflow suitable for the operation of the axial flow fan blade 130, which greatly reduces the eddies and energy loss caused by the rapid contraction of the airflow, and can reduce noise and improve air supply efficiency.

[0065] It is understandable that the surface on the outlet side of the air guide section 114 can also be understood as the interface where the air guide section 114 gradually changes from an ellipse to a circle. The major and minor axes of the elliptical air inlet are both larger than the diameter of the ventilation section 115.

[0066] Please refer to Figures 1 to 5 Furthermore, the air supply assembly 100 also includes a mesh cover 150 disposed on the outlet side of the air guide 110. The mesh cover 150 is provided with spiral guide ribs 151 in the area corresponding to the air outlet side of the air guide channel 111. The spiral direction of the guide ribs 151 is opposite to the spiral direction of the blades 131 of the axial flow fan blade 130.

[0067] In this embodiment, the spiral direction of the guide rib 151 is opposite to the spiral direction of the blade 131 of the axial fan blade 130. The guide rib 151 can apply a reverse torque to the rotating airflow delivered by the axial fan blade 130, which can effectively eliminate the rotational component of the airflow and convert it into axial straight airflow, thus enabling long-distance air delivery.

[0068] Furthermore, the side length of the mesh cover 150 is L, and the diameter of the axial flow fan blade 130 is D1, where L = Z * D1. The value of Z ranges from 1.03 to 1.05.

[0069] In this embodiment, the value of Z is set to be between 1.03 and 1.05. The slightly enlarged flow area relative to the air outlet side of the air guide channel 111 can prevent the mesh cover 150 itself from creating new constraints on the airflow, which would lead to increased back pressure and efficiency loss.

[0070] In one embodiment of this application, the value of Z is 1.04. Of course, in other embodiments of this application, the value of Z can also be adaptively adjusted to be arbitrarily selected in the range of 1.03 to 1.04, including the endpoint values ​​of 1.03 and 1.04.

[0071] Furthermore, the mesh cover 150 is approximately square in shape and is installed inside the indoor air outlet 313. It has a circular air supply area 152, the axis of which coincides with the axis of the air guide channel 111. The guide ribs 151 are provided in the circular air supply area 152.

[0072] In this embodiment, the blades 131 of the axial flow fan 130 spiral and rotate in a clockwise direction. The guide ribs 151 extend from the center to the edge and spiral in a counterclockwise direction; the spiral angle can be determined according to actual needs.

[0073] Please refer to Figures 1 to 5 Furthermore, the air supply assembly 100 also includes a drive motor 170 and a motor mounting bracket 190. The motor mounting bracket 190 is installed on the air inlet surface 112 of the air guide 110, and the drive motor 170 is installed on the motor mounting bracket 190. The output shaft of the drive motor 170 is connected to the axial flow fan blade 130 to drive the axial flow fan blade 130 to rotate and to position the installation position of the axial flow fan blade 130 so that the axis of the axial flow fan blade 130 coincides with the axis of the air guide channel 111.

[0074] In summary, this application, by installing the axial flow fan blade 130 in the air guide channel 111 and ensuring that the projection of the leading edge root points of all blades 131 of the axial flow fan blade 130 in the direction perpendicular to the axis of the axial flow fan blade 130 falls within the area of ​​the transition section 116, causes the blades 131 to extend partly to the ventilation section 115 and partly to the air guide section 114, thereby improving the problem of airflow loss caused by air leakage from the high-pressure side to the low-pressure side during air supply. Secondly, it can also improve the air supply capacity and increase the collection range. It can also ensure that the airflow exiting the air guide section 114 can be immediately and unobstructedly captured and work by the leading edge of the blades 131 of the axial flow fan blade 130, avoiding the airflow separation and vortex between the outlet of the air guide section 114 and the fan blade inlet.

[0075] The above description is only a specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. An indoor unit for an air conditioner, characterized in that, The indoor unit of the air conditioner includes the cabinet body (310) and the air supply assembly (100). The air supply assembly (100) includes an air guide (110) and an axial flow fan blade (130). The air guide (110) has an air guide channel (111), an air inlet surface (112) located on the air inlet side of the air guide channel (111), and an air outlet surface (113) located on the air outlet side of the air guide channel (111). A heat exchanger (330) is provided inside the cabinet body (310), the air guide (110) is provided in the cabinet body (310), and the air inlet surface (112) corresponds to the heat exchanger (330); The air guide channel (111) includes an air guide section (114), a transition section (116), and a ventilation section (115) connected in sequence; wherein, the air guide section (114) is close to the air inlet surface (112), and the ventilation section (115) is close to the air outlet surface (113). The axial flow fan blade (130) is installed in the air guide channel (111), and the projection of the leading edge root point of all blades (131) of the axial flow fan blade (130) in the direction perpendicular to the axis of the axial flow fan blade (130) falls into the area of ​​the transition section (116).

2. The indoor unit of the air conditioner according to claim 1, characterized in that, The thickness of all blades (131) of the axial flow fan (130) in the axial direction of the axial flow fan (130) is H1, and the distance between the air inlet surface (112) and the air outlet surface (113) is H2, where H1 = C * H2; The value of C ranges from 0.6 to 0.

9.

3. The indoor unit of the air conditioner according to claim 2, characterized in that, The thickness of all blades (131) of the axial flow fan (130) in the axial direction of the axial flow fan (130) is H1, and the distance between the two ends of the leading edge of the blades (131) of the axial flow fan (130) in the axial direction of the axial flow fan (130) is H1. H, H = A * H1; The value of A ranges from 0.35 to 0.

45.

4. The indoor unit of the air conditioner according to claim 3, characterized in that, The distance between the air inlet surface (112) and the air outlet surface (113) is H2, and the distance between the leading edge blade root point of all blades (131) of the axial flow fan (130) and the air outlet surface (113) is L1, where L1 = N * H2; The value of N ranges from 0.5 to 0.

6.

5. The indoor unit of the air conditioner according to claim 4, characterized in that, The distance between the trailing edge blade root point of all blades (131) of the axial flow fan (130) and the air outlet surface (113) is L2, and the distance between the air inlet surface (112) and the air outlet surface (113) is H2, where L2 = M * H2. The value of M ranges from 0.15 to 0.

2.

6. The indoor unit of the air conditioner according to claim 5, characterized in that, The diameter of the outlet side of the air guide channel (111) is D2, and the diameter of the axial flow fan blade (130) is D1, where D1 = B * D2; The value of B ranges from 0.95 to 0.

99.

7. The air conditioner indoor unit according to any one of claims 1-6, characterized in that, The distance between the leading edge root point of all blades (131) of the axial flow fan (130) and the air outlet surface (113) is equal to the length of the ventilation section (115).

8. The indoor unit of the air conditioner according to any one of claims 1-6, characterized in that, The air supply assembly (100) also includes a mesh cover (150) disposed on the outlet side of the air guide (110). The mesh cover (150) and the air outlet area of ​​the air guide channel (111) are provided with spiral guide ribs (151). The spiral direction of the guide rib (151) is opposite to the spiral direction of the blade (131) of the axial flow fan (130).

9. The indoor unit of the air conditioner according to claim 8, characterized in that, The side length of the mesh cover (150) is L, and the diameter of the axial flow fan blade (130) is D1, L=Z*D1; The value of Z ranges from 1.03 to 1.

05.

10. The indoor unit of an air conditioner according to any one of claims 1-6, characterized in that, The air inlet of the air guide channel (111) is elliptical, and the major axis of the ellipse is parallel to the height direction of the cabinet body (310), and the minor axis is parallel to the width direction of the cabinet body (310). The ventilation section (115) has a circular cross-section, and the cross-section of the air guide section (114) gradually changes from an ellipse to a circle to correspond to the ventilation section (115).

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