Air conditioner indoor unit and cabinet air conditioner

Abstract

The present application provides an air conditioner indoor unit and a cabinet air conditioner. The air conditioner indoor unit comprises a housing and commutated fans; an upper air opening is formed in the top part of the housing, and a lower air opening is formed in the lower part of the housing; an air duct is formed in the housing; each commutated fan comprises a fan shell that is rotatably arranged in the air duct and provided with a fan blade cavity; fan blades are rotatably provided in each fan blade cavity; when each fan shell is located at a first working position, the corresponding fan blades rotate, and indoor air close to the upper air opening can enter the air duct through the upper air opening and then is exhausted through the lower air opening; when each fan shell is located at a second working position, the corresponding fan blades rotate, and indoor air close to the lower air opening can enter the air duct through the lower air opening and then is exhausted through the upper air opening; and when the commutated fans are controlled to be located at different positions, air outlet in different directions can be achieved, thereby improving the heat exchange efficiency of the air conditioner indoor unit, reducing the power consumption of the air conditioner indoor unit, and solving the problems of reduced fan efficiency, large air supply volume loss, slow change in indoor air temperature, and the like caused by switching the rotation direction of the fans.

Description

Air conditioner indoor unit and cabinet air conditioner

[0001] Related applications

[0002] This application claims priority to Chinese patent application number 202311862654.0, filed on December 29, 2023, entitled “AN AIR CONDITIONER INDOOR UNIT AND CABINET AIR CONDITIONER,” the entire text of which is incorporated herein by reference. Technical Field

[0003] The present application belongs to the technical field of air conditioning, and in particular relates to an air conditioning indoor unit and a cabinet air conditioner. Background Art

[0004] In a traditional cabinet air conditioner indoor unit, the sidewalls of the housing are formed with upper and lower air outlets, positioned opposite each other, and an air inlet formed between the upper and lower outlets. When the fan rotates in a predetermined direction, air is discharged through the upper outlet, achieving a shower-like cooling effect. When the fan rotates in the opposite direction, air is discharged through the lower outlet, achieving a blanket-like heating effect. Switching the fan direction reduces fan efficiency, air volume, and indoor air temperature changes more slowly, increasing the time it takes for the room where the indoor unit is located to reach the set temperature. Summary of the Invention

[0005] In view of this, the present application provides an air-conditioning indoor unit and a cabinet air-conditioner.

[0006] The present application provides an air conditioner indoor unit, comprising:

[0007] A housing, wherein an upper air outlet is formed on an upper portion of the housing, and a lower air outlet is formed on a lower portion of the housing; an air duct is formed inside the housing between the upper air outlet and the lower air outlet;

[0008] At least one reversing fan, comprising a fan housing, the fan housing being rotatably disposed in the air duct; the fan housing forming a blade cavity communicating with the air duct, the blade cavity being rotatably disposed with a blade; the fan housing having a first working position and a second working position;

[0009] When the fan housing is in the first working position, the fan blades rotate, and the indoor air near the upwind port can enter the air duct through the upwind port and then be discharged through the downwind port;

[0010] When the fan housing is in the second working position, the fan blades rotate, and the indoor air close to the downwind port can enter the air duct through the downwind port and then be discharged through the upwind port.

[0011] Optionally, the air-conditioning indoor unit further includes an indoor heat exchanger, and the indoor heat exchanger is arranged in the air duct.

[0012] Optionally, the indoor heat exchanger includes a first heat exchange section and a second heat exchange section, and the first heat exchange section and the second heat exchange section are arranged in a zigzag structure.

[0013] Optionally, there is one reversing fan, which is arranged above or below the indoor heat exchanger.

[0014] Optionally, the reversing fan includes a first reversing fan and a second reversing fan, the first reversing fan is arranged above the indoor heat exchanger, and the second reversing fan is arranged below the indoor heat exchanger.

[0015] Optionally, the reversing fan includes a first reversing fan and a second reversing fan, and the first reversing fan and the second reversing fan are arranged up and down and are both located above the indoor heat exchanger.

[0016] Optionally, the reversing fan includes a first reversing fan and a second reversing fan, and the first reversing fan and the second reversing fan are arranged up and down and are both located below the indoor heat exchanger.

[0017] Optionally, the air-conditioning indoor unit is provided with a heating mode and a cooling mode;

[0018] When the air conditioner indoor unit is in the heating mode, the first reversing fan and the second reversing fan are both in the first working position, and the blades of the first reversing fan and / or the second reversing fan rotate;

[0019] When the air conditioner indoor unit is in the cooling mode, the first reversing fan and the second reversing fan are both in the second working position, and the blades of the first reversing fan and / or the second reversing fan rotate.

[0020] Optionally, the reversing fan includes a first reversing fan, a second reversing fan and a third reversing fan; the first reversing fan is arranged at the upwind outlet, the second reversing fan is arranged at the downwind outlet, and the third reversing fan is arranged above or below the indoor heat exchanger.

[0021] Optionally, the reversing fan includes a first reversing fan, a second reversing fan, a third reversing fan and a fourth reversing fan; the first reversing fan is arranged at the upwind outlet, the second reversing fan is arranged at the downwind outlet, the third reversing fan is arranged above the indoor heat exchanger, and the fourth reversing fan is arranged below the indoor heat exchanger.

[0022] Optionally, the reversing fan is an axial flow fan or a mixed flow fan.

[0023] Optionally, the fan casing can rotate within a range of 0° to 360°.

[0024] Optionally, a blade cavity inlet is formed at one axial end of the blade cavity, and an inlet grille is provided at the blade cavity inlet; a blade cavity outlet is formed at the other axial end of the blade cavity, and an outlet grille is provided at the blade cavity outlet.

[0025] Optionally, when the fan housing is in the first working position, the fan blade cavity inlet faces upward and the fan blade cavity outlet faces downward; when the fan housing is in the second working position, the fan blade cavity inlet faces downward and the fan blade cavity outlet faces upward.

[0026] Optionally, the reversing fan further includes a fan bracket, which is arranged on the circumferential outer side of the fan housing and connected to the fan housing; a rotating shaft is provided on the fan bracket, and the rotating shaft is rotatably arranged in the air duct.

[0027] Optionally, the rotation plane of the fan housing is perpendicular to the rotation plane of the fan blades, wherein the rotation plane of the fan housing is a plane perpendicular to the rotation axis of the fan housing, and the rotation plane of the fan blades is a plane perpendicular to the rotation axis of the fan blades.

[0028] Optionally, the rotation axis of the fan casing is arranged horizontally.

[0029] The present application also provides a cabinet air conditioner, comprising any of the air conditioner indoor units described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] To more clearly illustrate the embodiments of the present application or the technical solutions in conventional technologies, the following briefly introduces the drawings required for describing the embodiments or conventional technologies. Obviously, the drawings described below are merely illustrative, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0031] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not intended to limit the conditions under which this application can be implemented, and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in sizes should still fall within the scope of the technical contents disclosed in this application without affecting the efficacy and objectives that can be achieved by this application.

[0032] FIG1 is a schematic diagram of the assembly structure of an embodiment of an air-conditioning indoor unit provided in this application.

[0033] FIG2 is a schematic diagram of the exploded structure of an embodiment of an air-conditioning indoor unit provided in this application.

[0034] 3A and 3B are schematic diagrams of air flow paths of an embodiment of the air conditioner indoor unit provided by the present application when the indoor unit is in cooling mode.

[0035] 4A and 4B are schematic diagrams of air flow paths of an embodiment of the air conditioner indoor unit provided by the present application when the indoor unit is in heating mode.

[0036] FIG5 is a schematic diagram of the air flow path of an embodiment of the air conditioner indoor unit provided by the present application when the reversing fan at the upwind port is in sweeping mode.

[0037] FIG6A is a schematic diagram of the exploded structure of an axial flow fan embodiment provided in this application.

[0038] FIG6B is a schematic diagram of the assembly structure of an axial flow fan embodiment provided in this application.

[0039] 7A and 7B are schematic structural diagrams of an embodiment of the axial flow fan provided in the present application when it is in the first working position.

[0040] 8A and 8B are schematic structural diagrams of an embodiment of the axial flow fan provided in the present application when it is in the second working position.

[0041] In the picture:

[0042] 1-housing; 11-ventilation cover; 111-upper air outlet; 12-housing front side wall; 121-lower air outlet; 13-housing rear side wall; 14-base; 15-air duct;

[0043] 21 - First reversing fan; 22 - Second reversing fan; 23 - Fan housing; 231 - Blade chamber; 232 - Motor bracket; 233 - Blade chamber inlet; 234 - Blade chamber outlet; 24 - Blade; 25 - Blade shaft; 261 - Blade motor; 262 - Pressure plate; 271 - Inlet grille; 272 - Outlet grille; 281 - First fan bracket; 282 - Second fan bracket; 283 - First rotating shaft; 284 - Second rotating shaft;

[0044] 3-Indoor heat exchanger; 31-First heat exchange section; 32-Second heat exchange section. DETAILED DESCRIPTION

[0045] The following specific embodiments illustrate the implementation of this application. Those familiar with the art can easily understand the other advantages and functions of this application from the content disclosed in this specification. Obviously, the described embodiments are part of the embodiments of this application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0046] The terms used in the examples of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms "a," "the," and "the" used in the examples of this application and the appended claims are also intended to include plural forms, and unless the context clearly indicates otherwise, "a plurality" generally includes at least two, but does not exclude the inclusion of at least one.

[0047] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0048] It should also be noted that the terms "include," "comprises," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a product or system comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such product or system. In the absence of further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the product or system comprising the element.

[0049] Traditional cabinet air conditioners have upper and lower air outlets positioned opposite each other on the sidewalls of the housing, with an air inlet formed between them. When the fan rotates in a predetermined direction, air is discharged through the upper outlet, creating a shower-like cooling effect. When the fan rotates in the opposite direction, air is discharged through the lower outlet, creating a blanket-like heating effect. Switching the fan direction reduces fan efficiency, air volume, and indoor air temperature changes more slowly, increasing the time it takes for the room where the indoor unit is located to reach the set temperature.

[0050] The present invention inventively provides an air conditioner indoor unit, comprising a housing and a reversing fan. The housing has an upper air inlet formed on its upper portion and a lower air inlet formed on its lower portion; an air duct is formed within the housing. The reversing fan includes a fan housing rotatably disposed within the air duct and defining a blade cavity; a fan blade is rotatably disposed within the blade cavity.

[0051] When the fan housing is in the first operating position, the blades rotate, allowing indoor air near the upwind vent to enter the air duct through the upwind vent and then be discharged through the downwind vent. When the fan housing is in the second operating position, the blades rotate, allowing indoor air near the downwind vent to enter the air duct through the downwind vent and then be discharged through the upwind vent. Controlling the reversing fan in different positions allows air to be discharged in different directions, improving the heat exchange efficiency and reducing the power consumption of the air conditioner's indoor unit. This solves problems such as reduced fan efficiency, large air flow losses, and slow indoor air temperature changes when switching fan directions.

[0052] In some embodiments, referring to FIG. 1 to FIG. 4B , the air conditioner indoor unit includes a housing 1 and a reversing fan.

[0053] The top of the housing 1 is formed with an upper air vent 111 , and the bottom of the housing 1 is formed with a lower air vent 121 . An air duct 15 is formed inside the housing 1 between the upper air vent 111 and the lower air vent 121 , and the air duct 15 connects the upper air vent 111 and the lower air vent 121 .

[0054] Specifically, the housing 1 may include a front sidewall 12, a rear sidewall 13, and a base 14. The front sidewall 12 and the rear sidewall 13 are arranged relative to each other in front and back and snap together to form an air duct 15. A lower air outlet 121 is formed on the lower side of the front sidewall 12. A ventilation cover 11 is provided on the top of the housing 1, and the ventilation cover 11 is formed with an upper air outlet 111. The base 14 is provided at the bottom of the front sidewall 12 and the rear sidewall 13 of the housing and is connected to the front sidewall 12 and the rear sidewall 13 of the housing. The base 14 may be opposite to the ventilation cover 11.

[0055] Referring to Figures 6A-6B , the reversing fan includes a fan housing 23. The fan housing 23 is rotatably disposed within the air duct 15, allowing the reversing fan to rotate as a whole within the air duct 15. In some embodiments, the fan housing 23 is reversibly disposed within the air duct 15. When the fan housing 23 is flipped to different positions, the air inlet and outlet directions of the reversing fan can be adjusted.

[0056] Specifically, the fan housing 23 is formed with a blade cavity 231 that is in communication with the air duct 15 . The blade 24 is rotatably disposed in the blade cavity 231 . The air in the air duct 15 can flow by controlling the rotation of the blade 24 .

[0057] The fan housing 23 can rotate within the air duct 15 in an angle range of 0° to 360°. In some embodiments, the fan housing 23 is a cylindrical structure, and the blade cavity 231 is a cylindrical structure. A blade cavity inlet 233 is formed at one axial end of the blade cavity 231, and the blade cavity inlet 233 is provided with an inlet grille 271. A blade cavity outlet 234 is formed at the other axial end of the blade cavity 231, and the blade cavity outlet 234 is provided with an outlet grille 272. The fan housing 23 has a first working position and a second working position in its rotation direction. When the fan housing 23 is in the first working position, the blade cavity inlet 233 faces upward and the blade cavity outlet 234 faces downward. When the fan housing 23 is in the second working position, the blade cavity inlet 233 faces downward and the blade cavity outlet 234 faces upward. The fan housing 23 can rotate from the first working position to the second working position, or from the second working position to the first working position.

[0058] In some embodiments, when the fan housing 23 is in the first working position, the fan blades 24 rotate, and the indoor air near the upwind vent 111 can enter the air duct 15 through the upwind vent 111 and then be discharged through the downwind vent 121; at this time, the air conditioner indoor unit can operate in the heating mode;

[0059] When the fan housing 23 is in the second working position, the fan blades 24 rotate, and the indoor air near the downwind port 121 can enter the air duct 15 through the downwind port 121 and then be discharged through the upwind port 111; at this time, the air conditioner indoor unit can operate in cooling mode.

[0060] The rotation axis of the fan housing 23 and the rotation axis of the fan blades 24 may be in the same plane or in different planes. Optionally, the rotation axis of the fan housing 23 and the rotation axis of the fan blades 24 are in the same plane. The rotation plane of the fan housing 23 and the rotation plane of the fan blades 24 intersect. Optionally, the rotation plane of the fan housing 23 and the rotation plane of the fan blades 24 are perpendicular; wherein, the rotation plane of the fan housing 23 is a plane perpendicular to the rotation axis of the fan housing 23, and the rotation plane of the fan blades 24 is a plane perpendicular to the rotation axis of the fan blades 24. When the rotation axis of the fan housing 23 and the rotation axis of the fan blades 24 are perpendicular, the rotation plane of the fan housing 23 and the rotation plane of the fan blades 24 are perpendicular. In some embodiments, the rotation axis of the fan housing 23 is arranged horizontally.

[0061] By controlling the direction of the reversing fan, for example, rotating the reversing fan as a whole to the corresponding position, air can be discharged from the upper air outlet 111 or the lower air outlet 121, taking into account the different comfort needs of the human body for heating and cooling, solving the problems of high noise, easy suction of curtains and low heat exchange efficiency of the indoor heat exchanger when the air inlet is located in the middle of the shell 1, and solving the problems of small air supply volume and low indoor air energy utilization rate caused by switching the fan direction to achieve air discharge in different directions.

[0062] Referring to Figures 7A and 7B, in some embodiments, the fan housing 23 is formed with a motor bracket 232 near the fan chamber inlet 233. The fan blades 24 are formed with a fan shaft 25, which is rotatably disposed in the fan chamber 231. A fan motor 261 is disposed on the motor bracket 232. The output shaft of the fan motor 261 is drivingly connected to the fan shaft 25, and can drive the fan blades 24 to rotate in the fan chamber 231. A pressure plate 262 is also disposed on the motor bracket 232. The pressure plate 262 is located at one end of the output shaft away from the fan motor 261, and serves to limit the fan motor 261. In this way, along the axial direction of the fan chamber 231, from the fan chamber inlet 233 to the fan chamber outlet 234, an inlet grille 271, the fan blades 24, the fan motor 261, the pressure plate 262, and the outlet grille 272 are sequentially disposed.

[0063] In some embodiments, the reversing blower further includes a blower bracket having a segmented structure and including a first blower bracket 281 and a second blower bracket 282. The first blower bracket 281 and the second blower bracket 282 are, for example, both arc-shaped. The first blower bracket 281 and the second blower bracket 282 are coaxially arranged and connected to form a ring structure. The first blower bracket 281 and the second blower bracket 282 are disposed circumferentially outside the blower housing 23 and are connected to the blower housing 23. A first rotating shaft 283 is disposed circumferentially outside the first blower bracket 281. The first rotating shaft 283 extends radially from the first blower bracket 281 and is rotatably disposed within the air duct 15. A second rotating shaft 284 is disposed circumferentially outside the second blower bracket 282. The second rotating shaft 284 extends radially from the second blower bracket 282 and is rotatably disposed within the air duct 15. Rotation of the first rotating shaft 283 and the second rotating shaft 284 causes the reversing blower to rotate as a whole.

[0064] In some embodiments, to address the problem of high air flow resistance and low air supply volume in the air duct 15 due to inappropriate setting position of the reversing fan, the air conditioner indoor unit also includes an indoor heat exchanger 3, which is set in the air duct 15.

[0065] In some embodiments, two reversing fans are provided and include a first reversing fan 21 and a second reversing fan 22 . The first reversing fan 21 is provided above the indoor heat exchanger 3 , and the second reversing fan 22 is provided below the indoor heat exchanger 3 .

[0066] Furthermore, the air conditioner indoor unit is provided with a heating mode and a cooling mode.

[0067] Referring to Figures 7A and 7B , when the air conditioner indoor unit is in heating mode, the first reversing fan 21 and the second reversing fan 22 are both in the first operating position, and the blades 24 of the first reversing fan 21 and / or the second reversing fan 22 rotate. The second reversing fan 22 draws air into the air duct 15 from the downwind port 121. The second reversing fan 22 performs work on the air and outputs it upward. When the air reaches the windward side of the indoor heat exchanger 3, the air velocity experiences a significant gradient drop due to the throttling resistance of the fins of the indoor heat exchanger 3. If only a single fan were used, the air would experience significant velocity loss after passing through the indoor heat exchanger 3, resulting in air volume loss. If two fans were used, a stable pressure zone could be formed between the two fans. When the indoor heat exchanger 3 is in this stable pressure zone, the gradient of air velocity variation between the windward and leeward sides of the indoor heat exchanger 3 can be reduced, thereby reducing air volume loss. At the same time, the secondary work and pressure boosting of the first fan can further increase the air flow rate at the upper air outlet 111, greatly improving the overall fan system efficiency and increasing the air volume. Similarly, two fans have a significant improvement in overcoming the resistance of the extra-long air duct compared to a single fan. Due to the improved fan efficiency, under the same conditions, the volume of the housing 1 required for two fans is smaller than that of a single fan, resulting in less material consumption and higher utilization of the air conditioner, lower production and processing difficulty, higher efficiency, and greater energy conservation and environmental protection.

[0068] Referring to Figures 8A and 8B , when the air conditioner indoor unit is in cooling mode, the first reversing fan 21 and the second reversing fan 22 are both in the second operating position, and the blades 24 of the first reversing fan 21 and / or the second reversing fan 22 rotate. The first reversing fan 21 draws air from the upwind port 111 into the air duct 15. After passing through the indoor heat exchanger 3, the air is then pressurized again by the second reversing fan 22 and delivered to the indoor room. Compared to cooling mode, in heating mode, the air in the air duct 15 is reversed. For a single fan, in addition to the effects of duct resistance, the air passing through the indoor heat exchanger 3 changes from blowing to suction, resulting in a different air velocity distribution through the indoor heat exchanger 3 and a loss of heat exchange efficiency. However, two fans can adapt to different air inlet and outlet modes, maintaining a "pull-front, push-back" two-stage pressurization (one suction, one blow) to ensure that the air passing through the indoor heat exchanger 3 is in the same condition in both modes, thus maintaining the heat exchange efficiency of the indoor heat exchanger 3.

[0069] In heating mode, due to the characteristics of hot air, heat accumulates at the top of the room, resulting in energy waste. When using top-intake and bottom-outlet in heating mode, hot air from the top is drawn in and blown out through the bottom vent 121, transporting it to the human activity area. This achieves indoor airflow regulation for top-heating and bottom-heating, achieving floor-heating-style heating while efficiently utilizing indoor energy and significantly reducing air conditioning power consumption.

[0070] In cooling mode, due to the characteristics of cold air, the temperature in the lower part of the room will become even lower. However, this lower air is located at the feet and does not affect the human activity area, resulting in energy waste. When cooling adopts bottom-intake and top-out, the lower cold air can be drawn into the air conditioner and then blown out from the upper air vent 111, achieving bottom-cooling and top-use indoor air flow regulation. While achieving the cooling effect of not blowing the cold air on people, it also enables efficient use of indoor energy, significantly reduces the power consumption of the air conditioner, and achieves the most reasonable and efficient air inlet and outlet method.

[0071] Optionally, the reversing fan is an axial flow fan or a mixed flow fan.

[0072] When both first reversing fan 21 and second reversing fan 22 are axial flow fans, they form a bipolar reversing axial flow fan system, switching the airflow direction. In heating mode, air flows from top to bottom, while in cooling mode, air flows from bottom to top, achieving the most efficient airflow and inlet / outlet arrangement. This innovative airflow organization and regulation technology maximizes the air conditioning heat exchange efficiency and room airflow organization regulation efficiency, effectively reducing air conditioning power consumption.

[0073] Through the secondary boosting of the first reversing fan 21 and the second reversing fan 22, the air pressure in the air duct 15 can be greatly increased, the fan efficiency can be maximized, the fan power consumption can be reduced, the influence of the extra-long air duct 15 and the different flow resistances of the indoor heat exchanger can be reduced, and the problems of large air duct resistance and small air supply volume can be solved.

[0074] 5 , in some embodiments, when the reversing fan is located at the upper air outlet 111 , the reversing fan can be controlled to rotate as a whole to achieve a sweeping effect. For example, the reversing fan located at the upper air outlet 111 can be installed on the top of the housing 1 instead of the ventilation cover 11 .

[0075] In some embodiments, to address the problem of low heat exchange efficiency caused by an unreasonable structural design of the indoor heat exchanger 3, the indoor heat exchanger 3 includes a first heat exchange section 31 and a second heat exchange section 32. The first heat exchange section 31 and the second heat exchange section 32 have a zigzag structure. Optionally, the first heat exchange section 31 and the second heat exchange section 32 are arranged in a V-shaped structure, with the opening of the V-shaped structure facing upward, downward, left, or right.

[0076] An embodiment of the present application also provides a cabinet air conditioner, comprising the cabinet air conditioner indoor unit of any of the above embodiments.

[0077] By controlling the reversing of the reversing fan, it can be ensured that a single fan always has 100% efficiency output when discharging air from the upper air outlet 111 or the lower air outlet 121, and two-stage boosting can be achieved, thereby increasing the working capacity of the reversing fan and reducing the power consumption of the reversing fan.

[0078] In the embodiment of the present application, the reversing fan is rotatably arranged in the air duct as a whole. When the reversing fan is controlled to be in different positions, air outlet in different directions can be achieved without changing the rotation direction of the fan blades, thereby improving the heat exchange efficiency of the air-conditioning indoor unit, reducing the power consumption of the air-conditioning indoor unit, and solving the problems of reduced fan efficiency, large air supply loss and slow temperature change of indoor air when switching the fan direction.

[0079] In other embodiments, the first reversing fan 21 and the second reversing fan 22 are arranged vertically and both are located above the indoor heat exchanger 3, and the two fans are used to realize reversible air inlet and outlet.

[0080] In these embodiments, the reversing fans are integrally rotatably disposed within the air duct. Both the first and second reversing fans 21 and 22 are located above the indoor heat exchanger 3. Controlling the rotation of one blade of each reversing fan achieves air delivery in different directions. Controlling the rotation of both blades of the two reversing fans increases the air volume and distance delivered through secondary pressurization, improving the heat exchange efficiency of the air conditioner indoor unit and reducing its power consumption. This addresses issues such as reduced fan efficiency, significant air volume loss, and slow indoor air temperature changes when switching fan directions.

[0081] In some embodiments, the first reversing fan 21 and the second reversing fan 22 are arranged up and down and are both located below the indoor heat exchanger 3, and the two fans are used to achieve reversible air inlet and outlet.

[0082] In these embodiments, the reversing fans are integrally rotatably disposed within the air duct. Both the first and second reversing fans 21 and 22 are located below the indoor heat exchanger 3. Controlling the rotation of one blade of each reversing fan achieves simultaneous airflow in different directions. Controlling the rotation of both blades of the two reversing fans increases the airflow volume and distance through secondary boosting, improving the heat exchange efficiency of the air conditioner indoor unit and reducing its power consumption. This addresses issues such as reduced fan efficiency, significant airflow loss, and slow indoor air temperature changes when switching fan directions.

[0083] In some embodiments, unlike in Example 1, the air conditioner indoor unit further includes an indoor heat exchanger 3 disposed within the air duct 15, and a single reversing fan is provided, disposed above or below the indoor heat exchanger 3. If the project size is not limited, the fan size can be increased to achieve reversible air inflow and outflow using a single fan.

[0084] In some embodiments, there are three reversing fans including a first reversing fan 21, a second reversing fan 22 and a third reversing fan; the first reversing fan 21 is arranged at the upwind port 111, the second reversing fan 22 is arranged at the downwind port 121, and the third reversing fan is arranged above or below the indoor heat exchanger 3, and three fans are used to realize reversible up and down air inlet and outlet.

[0085] In these embodiments, the reversing fans are integrally rotatably disposed within the air duct, with one reversing fan positioned at each of the upper air outlet 111 and the lower air outlet 121, and one reversing fan positioned near the indoor heat exchanger 3. Controlling the rotation of the blades of the three reversing fans achieves air discharge in different directions, while also achieving multiple pressurizations, increasing the air supply volume, extending the air supply distance, improving the heat exchange efficiency of the air conditioner indoor unit, and reducing the power consumption of the air conditioner indoor unit. This addresses issues such as reduced fan efficiency, significant air supply volume loss, and slow indoor air temperature changes when switching fan directions. Controlling the first reversing fan 21 to swing causes the air discharged from the upper air outlet 111 to achieve a sweeping function. Controlling the second reversing fan 22 to swing causes the air discharged from the lower air outlet 121 to achieve a sweeping function.

[0086] In some embodiments, four reversing fans are provided, including a first reversing fan 21, a second reversing fan 22, a third reversing fan, and a fourth reversing fan. The first reversing fan 21 is provided at the upwind vent 111, the second reversing fan 22 is provided at the downwind vent 121, the third reversing fan is provided above the indoor heat exchanger 3, and the fourth reversing fan is provided below the indoor heat exchanger 3. The four fans achieve reversible air inflow and outflow.

[0087] In these embodiments, the reversing fans are rotatably disposed within the air duct as a whole, with one reversing fan disposed at each of the upper air outlet 111 and the lower air outlet 121, and one reversing fan disposed above and below the indoor heat exchanger 3. Controlling the rotation of the blades of the four reversing fans allows air to be discharged in different directions, while also achieving multiple pressurizations, increasing the air supply volume, extending the air supply distance, improving the heat exchange efficiency of the air conditioner indoor unit, and reducing the power consumption of the air conditioner indoor unit. This addresses issues such as reduced fan efficiency, large air supply volume losses, and slow indoor air temperature changes when switching fan directions. Controlling the first reversing fan 21 to swing allows the air discharged from the upper air outlet 111 to achieve a sweeping function. Controlling the second reversing fan 22 to swing allows the air discharged from the lower air outlet 121 to achieve a sweeping function.

[0088] While the exemplary embodiments of the present disclosure have been specifically illustrated and described above, it should be understood that the present disclosure is not limited to the detailed structures, configurations, or implementations described herein; rather, the present disclosure is intended to encompass various modifications and equivalent configurations within the spirit and scope of the appended claims.

Claims

1. An air conditioner indoor unit, characterized in that, Comprising: A housing, an upper air inlet is formed at the upper part thereof, a lower air outlet is formed at the lower part of the housing, and an air duct is formed inside the housing between the upper air inlet and the lower air outlet; At least one reversing fan, which includes a fan housing rotatably arranged in the air duct; the fan housing forms a blade cavity communicating with the air duct, and a blade is rotatably arranged in the blade cavity; the fan housing has a first working position and a second working position; When the fan housing is in the first working position, the blade rotates, and indoor air near the upper air inlet can enter the air duct through the upper air inlet and then be discharged through the lower air outlet; When the fan housing is in the second working position, the blade rotates, and indoor air near the lower air outlet can enter the air duct through the lower air outlet and then be discharged through the upper air inlet.

2. The indoor air conditioner according to claim 1, characterized in that, The air conditioner indoor unit further includes an indoor heat exchanger arranged in the air duct.

3. The air conditioner indoor unit according to claim 2, wherein, The indoor heat exchanger includes a first heat exchange section and a second heat exchange section, and the first heat exchange section and the second heat exchange section are arranged in a folded line structure.

4. The air conditioner indoor unit according to claim 2 or 3, characterized in that, One reversing fan is provided, and this reversing fan is arranged above or below the indoor heat exchanger.

5. The air conditioner indoor unit according to claim 2 or 3, characterized in that, The reversing fan includes a first reversing fan and a second reversing fan, the first reversing fan is arranged above the indoor heat exchanger, and the second reversing fan is arranged below the indoor heat exchanger.

6. The indoor air conditioner according to claim 2 or 3, characterized in that, The reversing fan includes a first reversing fan and a second reversing fan, the first reversing fan and the second reversing fan are arranged up and down and both are located above the indoor heat exchanger.

7. The indoor air conditioner according to claim 2 or 3, characterized in that, The reversing fan includes a first reversing fan and a second reversing fan, the first reversing fan and the second reversing fan are arranged up and down and both are located below the indoor heat exchanger.

8. The air conditioner indoor unit according to any one of claims 5 to 7, characterized in that, The air conditioner indoor unit is provided with a heating mode and a cooling mode; When the air conditioner indoor unit is in the heating mode, the first reversing fan and the second reversing fan are both in the first working position, and the blades of the first reversing fan and / or the second reversing fan rotate; When the air conditioner indoor unit is in the cooling mode, the first reversing fan and the second reversing fan are both in the second working position, and the blades of the first reversing fan and / or the second reversing fan rotate.

9. The air conditioner indoor unit according to claim 2 or 3, characterized in that, The reversing fan includes a first reversing fan, a second reversing fan and a third reversing fan; the first reversing fan is arranged at the upper air inlet, the second reversing fan is arranged at the lower air outlet, and the third reversing fan is arranged above or below the indoor heat exchanger.

10. The air conditioner indoor unit according to claim 2 or 3, characterized in that, The reversing fan includes a first reversing fan, a second reversing fan, a third reversing fan and a fourth reversing fan; the first reversing fan is arranged at the upper air inlet, the second reversing fan is arranged at the lower air outlet, the third reversing fan is arranged above the indoor heat exchanger, and the fourth reversing fan is arranged below the indoor heat exchanger.

11. The air conditioner indoor unit according to any one of claims 1 to 10, characterized in that, The reversing fan is an axial flow fan or a mixed flow fan.

12. The air conditioner indoor unit according to any one of claims 1 to 11, characterized in that, The rotatable angle range of the fan housing is 0° to 360°.

13. The air conditioner indoor unit according to any one of claims 1 to 12, characterized in that, An air impeller cavity inlet is formed at one axial end of the air impeller cavity, and an inlet grille is arranged at the air impeller cavity inlet; an air impeller cavity outlet is formed at the other axial end of the air impeller cavity, and an outlet grille is arranged at the air impeller cavity outlet.

14. The air conditioner indoor unit according to claim 13, characterized in that, When the fan housing is in the first working position, the air impeller cavity inlet faces upward and the air impeller cavity outlet faces downward; when the fan housing is in the second working position, the air impeller cavity inlet faces downward and the air impeller cavity outlet faces upward.

15. The air conditioner indoor unit according to any one of claims 1 to 14, characterized in that, The reversing fan further includes a fan bracket, the fan bracket is arranged on the circumferential outer side of the fan housing and connected to the fan housing; a rotating shaft is arranged on the fan bracket, and the rotating shaft is rotatably arranged in the air duct.

16. The air conditioner indoor unit according to any one of claims 1 to 15, characterized in that, The rotation plane of the fan housing and the rotation plane of the air impeller are perpendicular, wherein the rotation plane of the fan housing is a plane perpendicular to the rotation axis of the fan housing, and the rotation plane of the air impeller is a plane perpendicular to the rotation axis of the air impeller.

17. The air conditioner indoor unit according to any one of claims 1 to 16, characterized in that, The rotation axis of the fan housing is horizontally arranged.

18. A floor-standing air conditioner, characterized in that, An indoor air conditioner includes any one of claims 1 to 17.

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