Air conditioner indoor unit and heating and ventilation equipment

Abstract

The utility model discloses an air conditioner indoor unit and heating and ventilation equipment, the air conditioner indoor unit comprises a shell, a heat exchanger and an electric control box, an air duct is arranged in the shell, and the shell is provided with an air return port and an air outlet which communicate with the air duct; the heat exchanger is arranged in the air duct and is provided with an air inlet surface; the air channel is provided with an air inlet face and an air return opening, the electric control box is arranged in the air channel and located between the air inlet face and the air return opening, the electric control box is provided with a first flow guide face, the first flow guide face is used for guiding at least part of airflow blown to the outer edge of the heat exchanger in the air channel to the air inlet face, and the air conditioner indoor unit has smaller noise.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, and in particular to an air conditioning indoor unit and HVAC equipment. Background Art

[0002] In the relevant technical field, the existing air conditioner indoor unit is developing towards miniaturization and thinness, which will place a relatively large electric control box in the air duct. The outer contour of the electric control box causes the indoor unit to have a large aerodynamic noise. Utility Model Content

[0003] An embodiment of the present application provides an air-conditioning indoor unit having lower noise.

[0004] In a first aspect, an embodiment of the present application provides an air-conditioning indoor unit, comprising a shell, a heat exchanger and an electrical control box, wherein an air duct is arranged in the shell, and has a return air port and an air outlet connected to the air duct; the heat exchanger is arranged in the air duct and has an air inlet surface; the electrical control box is arranged in the air duct and is located between the air inlet surface and the return air port, wherein the electrical control box has a first guide surface, and the first guide surface is used to guide at least part of the airflow in the air duct blowing toward the outer edge of the heat exchanger to the air inlet surface.

[0005] Based on the air-conditioning indoor unit of the embodiment of the present application, the air flow enters into the air duct from the return air port and continues to flow in the air duct along the wall of the air duct, and the first guide surface guides the air flow when the air flow passes through the electric control box, and the first guide surface guides the air flow passing through the first guide surface to the air inlet surface of the heat exchanger. Since the first guide surface has a guiding effect on the air flow, the noise generated by the air flow in the air duct due to the obstruction of the outer contour of the electric control box is reduced, and since the electric control box has the first guide surface that has a guiding effect on the air flow, the obstruction of the electric control box to the air flow in the air duct is reduced, thereby improving the aerodynamic efficiency of the air-conditioning indoor unit.

[0006] In some embodiments of the present application, the electric control box is arranged on the top of the inner wall of the air duct.

[0007] Based on the above embodiment, when the electric control box is fixed to the top of the inner wall of the air duct, the top wall of the electric control box is connected to the top wall of the inner wall of the air duct. When disassembling and assembling, the electric control box only needs to be lifted up and pressed against the top of the inner wall of the air duct, which facilitates the disassembly and assembly of the electric control box.

[0008] In some embodiments of the present application, the first guide surface is arranged closer to the air inlet surface than to the return air outlet.

[0009] Based on the above embodiment, since the viscosity between the airflow entering the air duct through the return air port and the wall of the air duct will cause the airflow to become turbulent, the airflow enters the air duct through the return air port. As the airflow flows longer in the air duct, the viscosity between the airflow and the inner wall of the air duct and obstructions from other parts will cause the airflow to become turbulent. Therefore, setting the first guide surface with a guide effect closer to the air inlet surface can delay the turbulence of the airflow.

[0010] In some embodiments of the present application, the first guide surface extends in the airflow direction of the air duct, and the ratio of the extension dimension d of the first guide surface in the airflow direction of the air duct to the extension dimension l of the air duct in the airflow direction is greater than or equal to 0.1 and less than or equal to 0.2.

[0011] Based on the above embodiments, within this range, the first guide surface has an area large enough to guide the airflow passing through the first guide surface to the air inlet surface, but the first guide surface is not too large to restrict the shape of the electric control box.

[0012] In some embodiments of the present application, in the airflow direction of the air duct, the end of the first guide surface abuts against the air inlet surface.

[0013] Based on the above embodiment, after the end of the first guide surface abuts against the air inlet surface, there is no gap between the first guide surface and the air inlet surface. The airflow can flow directly to the air inlet surface along the first guide surface under the guidance of the first guide surface, further reducing the noise generated when the air conditioner indoor unit is working.

[0014] In some embodiments of the present application, a projection of the first guide surface in a direction toward the wind inlet surface is located within the region of the wind inlet surface.

[0015] Based on the above embodiments, it is ensured that the first guide surface can definitely guide the airflow to the air inlet surface.

[0016] In some embodiments of the present application, the air inlet surface and the first guide surface are both inclined surfaces, and the first guide surface and the air inlet surface form an angle α, wherein α is greater than or equal to 85° and less than or equal to 95°.

[0017] Based on the above embodiments, within this range, the airflow is guided by the first guide surface and flows toward the air inlet surface in a direction approximately perpendicular to the air inlet surface, so that the airflow can quickly pass through the heat exchanger.

[0018] In some embodiments of the present application, a guide member is further included, the guide member is connected to the shell at the return air port, the guide member has a second guide surface, and the second guide surface is parallel to the first guide surface.

[0019] Based on the above embodiment, the guiding direction of the second guide surface is the same as the guiding direction of the first guide member. Thus, the airflow always flows in the same direction under the continuous guiding effect of the second guide surface and the first guide surface.

[0020] In some embodiments of the present application, the air conditioner indoor unit includes a wind wheel, which is arranged behind the heat exchanger along the flow direction of the airflow, and the suction side of the wind wheel faces the heat exchanger; the shell also has an air supply channel, one end of the air supply channel is connected to the return air port, and the other end is connected to the air duct between the wind wheel and the heat exchanger.

[0021] Based on the above embodiment, since the air pressure on the suction side of the wind wheel is reduced, the pressure difference between the suction layer and the pressure side of the wind wheel causes the airflow at the air outlet to flow to the suction side of the wind wheel through the air supply channel, thereby improving the flow of the wind wheel close to the evaporator side, reducing the turbulent kinetic energy on the suction side of the wind wheel, and thereby reducing the noise of the air conditioner indoor unit.

[0022] In a second aspect, an embodiment of the present application provides a HVAC device, including an outdoor unit and an indoor unit as described above, which forms a circulation loop with the indoor unit.

[0023] Based on the HVAC equipment in the embodiment of the present application, due to the presence of the above-mentioned indoor unit, the HVAC equipment in the embodiment of the present application has lower noise.

[0024] Based on the air-conditioning indoor unit of the embodiment of the present application, the air flow enters into the air duct from the return air port and continues to flow in the air duct along the wall of the air duct, and the first guide surface guides the air flow when the air flow passes through the electric control box, and the first guide surface guides the air flow passing through the first guide surface to the air inlet surface of the heat exchanger. Since the first guide surface has a guiding effect on the air flow, the noise generated by the air flow in the air duct due to the obstruction of the outer contour of the electric control box is reduced, and since the electric control box has the first guide surface that has a guiding effect on the air flow, the obstruction of the electric control box to the air flow in the air duct is reduced, thereby improving the aerodynamic efficiency of the air-conditioning indoor unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 This is a schematic diagram of the structure of an air-conditioning indoor unit in an embodiment of the present application;

[0027] Figure 2 for Figure 1The CFD (Computational Fluid Dynamics) simulation diagram of the air conditioner indoor unit shown;

[0028] Figure 3 for Figure 1 Enlarged schematic diagram of the structure of part A in the middle.

[0029] Figure numerals: 10, shell; 11, air duct; 12, return air port; 13, air outlet; 14, air supply channel; 20, heat exchanger; 21, air inlet surface; 22, air outlet surface; 30, electrical control box; 31, first guide surface; 40, guide member; 41, second guide surface; 50, liquid storage member; 60, wind wheel. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0031] In the relevant technical field, the cabinet of the existing indoor unit is developing towards miniaturization and thinning, so the electric control box needs to be arranged in the air duct, but the volume of the electric control box is large, and the outer contour of the electric control box causes the indoor unit to have a large aerodynamic noise.

[0032] To solve the above technical problems, please refer to Figure 1 and Figure 2 As shown, the first aspect of the present application proposes an air-conditioning indoor unit, which includes a housing 10, a heat exchanger 20 and an electric control box 30, and the air-conditioning indoor unit has lower noise.

[0033] It is understandable that the air conditioner indoor unit is used in combination with the air conditioner outdoor unit. The air conditioner indoor unit is set in the building and is responsible for providing cold air or hot air to the indoor room, while the air conditioner outdoor unit is set outside the building and is responsible for transferring the indoor heat or cold to the outdoor room. It is understandable that the number of air conditioner indoor units can be multiple, and multiple air conditioner indoor units can be connected to the same air conditioner outdoor unit; or, the number of air conditioner outdoor units can be multiple, and multiple air conditioner outdoor units can be connected to the same air conditioner indoor unit.

[0034] Please refer to Figure 1 As shown, an air duct 11 is provided in the shell 10, and has a return air port 12 and an air outlet 13 connected to the air duct 11, and the heat exchanger 20 is arranged in the air duct 11 and has an air inlet surface 21; the electric control box 30 is arranged in the air duct 11 and is located between the air inlet surface 21 and the return air port 12, wherein the electric control box 30 has a first guide surface 31, and the first guide surface 31 is used to guide at least part of the airflow in the air duct 11 blowing toward the outer edge of the heat exchanger 20 to the air inlet surface 21.

[0035] The housing 10 is used to enclose an air duct 11 of an indoor unit of an air conditioner, and the housing 10 is connected to a wall or a ceiling to fix the indoor unit of the air conditioner. In the embodiment of the present application, the material, shape, and size of the housing 10 are not limited. It can be understood that the shape and size of the housing 10 can be adjusted according to the size and function of the indoor unit of the air conditioner. When the airflow flows in the air duct 11, it enters the air duct 11 from the return air port 12. When the airflow passes through the air duct 11, it is heated or cooled by the internal heat exchanger 20 and flows into the room from the air outlet 13.

[0036] The heat exchanger 20 is used to heat or cool the airflow passing through the heat exchanger 20. It can be understood that the heat exchanger 20 also has an air outlet surface 22 arranged opposite to the air inlet surface 21. The airflow enters the heat exchanger 20 from the air inlet surface 21, is heated or cooled by the heat exchanger 20, and then flows out of the heat exchanger 20 from the air outlet surface 22. In some embodiments of the present application, the heat exchanger 20 is an evaporator, that is, the heat exchanger 20 only heats the airflow.

[0037] In addition, to improve the heat exchange efficiency of the air conditioner indoor unit, please refer to Figure 1 As shown, in some embodiments of the present application, the heat exchanger 20 is arranged at an angle, that is, one end of the heat exchanger 20 is located at one end of the air duct 11 close to the return air port 12 and abuts the top wall of the heating section, and the other end is located at one end of the heating section close to the air outlet 13 and abuts the bottom wall of the heating section, so as to increase the contact area between the airflow and the heat exchanger 20, thereby improving the heat exchange rate of the heat exchanger 20 to the airflow.

[0038] Please refer to Figure 1 As shown, in some embodiments of the present application, the air-conditioning indoor unit also includes a liquid storage component 50 having a water storage tank. The liquid storage component 50 is fixed on the inner wall surface of the air duct 11, and the liquid storage component 50 is arranged along the width direction of the heat exchanger 20. In this way, the water generated on the heat exchanger 20 will drip or flow along the heat exchanger 20 into the liquid storage component 50. It can be understood that the number of liquid storage components 50 can be multiple, and the depth direction of the water storage tank is parallel to the gravity direction.

[0039] The electric control box 30 is used to receive instructions (for example, instructions from an air conditioner remote controller or a smart device such as a mobile phone) and control the operation of the air conditioner indoor unit according to the instructions.

[0040] The first guide surface 31 is used to guide at least part of the airflow in the air duct 11 blowing toward the outer edge of the heat exchanger 20 to the air inlet surface 21. In some embodiments of the present application, the first guide surface 31 may constitute a partial wall surface of the air duct 11, and the first guide surface 31 may be an arcuate surface or a plane. It can be specifically set according to the shape of the air duct 11, as long as the first guide surface 31 can guide the airflow to the air inlet surface 21 of the heat exchanger 20.

[0041] In addition, in order to control the restriction of the first guide surface 31 on the shape of the electric control box 30, in some embodiments of the present application, the ratio of the area of ​​the first guide surface 31 to the area of ​​the outer surface of the electric control box 30 is greater than or equal to 0.1 and less than or equal to 0.25, so as to avoid restricting the shape of the electric control box 30 due to the excessively large area of ​​the first guide surface 31, and also avoid the guiding effect of the airflow being too small due to the excessively small area of ​​the first guide surface 31.

[0042] The air duct 11 is used for air flow to pass through. It is understood that in order to reduce the noise of the indoor unit of the air conditioner, the wall surface of the air duct 11 should be smooth, and the extension direction of the air duct 11 should tend to be straight, so as to reduce the turbulence of the air flow caused by turning when flowing in the air duct 11. If the extension direction of the air duct 11 must be bent, the air duct 11 should transition with an arc-shaped wall surface at the bend to reduce the turbulence of the air flow caused by turning when flowing in the air duct 11.

[0043] In order to reasonably distribute the heat exchanger 20 and the electric control box 30 in the air duct 11, in some embodiments of the present application, the air duct 11 includes a return air section, a heating section and an air outlet section which are connected in sequence, the return air section is connected to the return air port 12, the air outlet section is connected to the air outlet 13, the electric control box 30 is in the return air section, the first guide surface 31 constitutes the wall surface of the return air section, and the heat exchanger 20 is fixed in the heating section. In combination with the above-mentioned inclined arrangement of the heat exchanger 20, one end of the heat exchanger 20 is located at one end of the heating section close to the air inlet section and abuts against the top wall of the heating section, and the other end is located at one end of the heating section close to the air outlet end and abuts against the bottom wall of the heating section.

[0044] It can be understood that if the extension direction of the air inlet section and the extension direction of the heating section form an angle, the wall surface of the air duct 11 at the turning point between the return air section and the heating section should transition in an arc shape. Similarly, if the extension direction of the heating section and the extension direction of the air outlet section form an angle, the wall surface of the air duct 11 at the turning point between the heating section and the air outlet section should transition in an arc shape.

[0045] Based on the indoor unit of the air conditioner in the embodiment of the present application, the airflow enters the air duct 11 from the return air port 12 and continues to flow in the air duct 11 along the wall of the air duct 11. When the airflow passes through the electric control box 30, the airflow is guided by the first guide surface 31. The first guide surface 31 guides the airflow flowing through the first guide surface 31 to the air inlet surface 21 of the heat exchanger 20. Since the first guide surface 31 has a guiding effect on the airflow, the noise generated by the airflow in the air duct 11 due to the obstruction of the outer contour of the electric control box 30 is reduced. In addition, since the electric control box 30 has the first guide surface 31 that has a guiding effect on the airflow, the obstruction of the electric control box 30 on the airflow in the air duct 11 is reduced, thereby improving the aerodynamic efficiency of the indoor unit of the air conditioner. For specific aerodynamic effects, please refer to Figure 2 shown.

[0046] Please refer to Figure 1As shown, in some embodiments of the present application, the electric control box 30 is arranged on the top of the inner wall of the air duct 11. When the electric control box 30 is fixed to the top wall of the inner wall of the air duct 11, the top wall of the electric control box 30 is connected to the top wall of the inner wall of the air duct 11, which facilitates the disassembly and assembly of the electric control box 30.

[0047] In other embodiments of the present application, the housing 10 further has a receiving groove connected to the air duct 11, the electric control box 30 is arranged in the receiving groove, and the first guide surface 31 is exposed outside the receiving groove through the notch of the receiving groove. In order to ensure the flatness of the wall surface of the air duct 11, further, the first guide surface 31 is flush with the notch of the receiving groove. Further, after the electric control box 30 is installed in the receiving groove, the outer surface of the electric control box 30 is in contact with the groove wall of the receiving groove.

[0048] Please refer to Figure 1 As shown, in some embodiments of the present application, the first guide surface 31 is arranged closer to the air inlet surface 21 than the return air port 12. Since the viscosity between the air flow entering the air duct 11 through the return air port 12 and the wall surface of the air duct 11 will cause the air flow to generate turbulence, the air flow enters the air duct 11 through the return air port 12. As the air flow distance in the air duct 11 becomes longer, the viscosity between the air flow and the inner wall of the air duct 11 and the obstruction of other parts will cause the air flow to become turbulent. Therefore, setting the first guide surface 31 with a guiding effect closer to the air inlet surface 21 can delay the turbulence of the air flow, reduce the noise of the air conditioner outdoor unit and improve the efficiency of the air conditioner outdoor unit.

[0049] In some embodiments of the present application, the first guide surface 31 extends in the air flow direction of the air duct 11, and the ratio of the extension dimension d of the first guide surface 31 in the air flow direction of the air duct 11 to the extension dimension l of the air duct 11 in the air flow direction is greater than or equal to 0.1 and less than or equal to 0.2, for example, 0.14, 0.14, 0.16 or 0.18, etc. Within this range, the first guide surface 31 has a sufficiently large area to guide the air flow passing through the first guide surface 31 to the air inlet surface 21, but the first guide surface 31 is not too large to restrict the shape of the electrical control box 30.

[0050] It is understandable that the longer the extension distance of the first guide surface 31 in the air flow direction of the air duct 11 is, the better the noise reduction effect of the first guide surface 31 on the air conditioner indoor unit is, but the length of the electric control box 30 along the air flow direction is required to be longer.

[0051] Please refer to Figure 1 As shown, in some embodiments of the present application, in the air flow direction of the air duct 11, the end of the first guide surface 31 abuts against the air inlet surface 21, so that there is no gap between the first guide surface 31 and the air inlet surface 21, and the air flow can flow directly along the first guide surface 31 to the air inlet surface 21, further reducing the noise generated when the air conditioner indoor unit is working.

[0052] If there is a gap between the first guide surface 31 and the air inlet surface 21, the airflow will enter the gap between the first guide surface 31 and the air inlet surface 21 after passing through the first guide surface 31. The sudden large change in the direction of the airflow will cause the airflow to produce greater turbulence and thus generate noise. In addition, when the airflow passes through the narrow gap between the first guide surface 31 and the air inlet surface 21, it will also generate a lot of noise.

[0053] Please refer to Figure 1 As shown, in some embodiments of the present application, the projection of the first guide surface 31 in the direction toward the air inlet surface 21 is located within the area of ​​the air inlet surface 21 , ensuring that the first guide surface 31 can definitely guide the airflow to the air inlet surface 21 .

[0054] Please refer to Figure 1 As shown, in some embodiments of the present application, the air inlet surface 21 and the first guide surface 31 are both inclined surfaces, and the first guide surface 31 forms an angle α with the air inlet surface 21, wherein α is greater than or equal to 85° and less than or equal to 95°, for example, 86°, 87°, 88°, 89°, 90°, 91°, 92°, 93° or 94°, etc. Within this range, the flow direction of the airflow after being guided by the first guide surface 31 is approximately perpendicular to the air inlet surface 21, that is, the airflow can flow perpendicularly to the air inlet surface 21 so that the airflow can pass through the heat exchanger 20 quickly.

[0055] Furthermore, in some embodiments of the present application, the angle α between the first guide surface 31 and the air inlet surface 21 is 90°. At this time, the airflow is guided by the first guide surface 31 and then flows vertically to the air inlet surface 21, so as to speed up the efficiency of the airflow passing through the heat exchanger 20, thereby improving the working efficiency of the air conditioner indoor unit.

[0056] Please refer to Figure 1 and Figure 3 As shown, in some embodiments of the present application, a guide member 40 is further included. The guide member 40 is connected to the shell at the return air port 12. The guide member 40 has a second guide surface 41. The second guide surface 41 is parallel to the first guide surface 31. The guide direction of the second guide surface 41 is the same as the guide direction of the first guide member 40. In this way, the airflow always flows in the same direction under the continuous guide action of the second guide surface 41 and the first guide surface 31.

[0057] It can be understood that one guide member 40 may have two guide surfaces parallel to each other, and there may be multiple guide members 40, and the guide surfaces on the multiple guide members 40 are parallel to each other.

[0058] Please refer to Figure 1As shown, in some embodiments of the present application, the air conditioner indoor unit includes a fan wheel 60, which is arranged behind the heat exchanger 20 along the flow direction of the air flow, and the suction side of the fan wheel 60 faces the heat exchanger 20; the housing 10 also has an air supply channel 14, one end of the air supply channel 14 is connected to the return air port 12, and the other end is connected to the air duct 11 between the fan wheel 60 and the heat exchanger 20.

[0059] As the air pressure on the suction side of the wind wheel 60 decreases, the pressure difference between the suction layer and the pressure side of the wind wheel 60 causes the air flow at the air outlet 13 to flow to the suction side of the wind wheel 60 through the air supply channel 14, thereby improving the flow of the wind wheel 60 close to the evaporator side, reducing the turbulent kinetic energy on the suction side of the wind wheel 60, and thereby reducing the noise of the air conditioner indoor unit.

[0060] In a second aspect, an embodiment of the present application provides a HVAC device, including an outdoor unit and an indoor unit as described above, which forms a circulation loop with the indoor unit.

[0061] Based on the HVAC equipment in the embodiment of the present application, due to the presence of the above-mentioned indoor unit, the HVAC equipment in the embodiment of the present application has lower noise.

[0062] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate an orientation or position relationship based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0063] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An air conditioner indoor unit, characterized in that: include: The housing has an air duct disposed therein and has an air return port and an air outlet communicated with the air duct; A heat exchanger is arranged in the air duct and has an air inlet surface; as well as The electrical control box is arranged in the air duct and located between the air inlet surface and the return air port, wherein the electrical control box has a first guide surface, and the first guide surface is used to guide at least part of the airflow in the air duct blowing toward the outer edge of the heat exchanger to the air inlet surface.

2. The air conditioner indoor unit according to claim 1, characterized in that: The electric control box is arranged on the top of the inner wall of the air duct.

3. The air conditioner indoor unit according to claim 1, characterized in that: The first guide surface is arranged closer to the air inlet surface than the return air outlet.

4. The air conditioner indoor unit according to claim 3, characterized in that: The first guide surface extends in the airflow direction of the air duct, and a ratio of an extension dimension d of the first guide surface in the airflow direction of the air duct to an extension dimension l of the air duct in the airflow direction is greater than or equal to 0.1 and less than or equal to 0.

2.

5. The air conditioner indoor unit according to claim 3, characterized in that: In the airflow direction of the air duct, the end of the first guide surface abuts against the air inlet surface.

6. The air conditioner indoor unit according to claim 1, characterized in that: A projection of the first guide surface in a direction toward the wind inlet surface is located within the region of the wind inlet surface.

7. The air conditioner indoor unit according to claim 1, characterized in that: The air inlet surface and the first flow guide surface are both inclined surfaces, and the first flow guide surface and the air inlet surface form an angle α, wherein α is greater than or equal to 85° and less than or equal to 95°.

8. The air conditioner indoor unit according to claim 1, characterized in that: Also includes: A flow guide is connected to the shell at the return air port, and the flow guide has a second flow guide surface, and the second flow guide surface is parallel to the first flow guide surface.

9. The air conditioner indoor unit according to claim 1, characterized in that: The air conditioner indoor unit includes a wind wheel, which is arranged behind the heat exchanger along the flow direction of the air flow, and the suction side of the wind wheel faces the heat exchanger; the shell also has an air supply channel, one end of the air supply channel is connected to the return air port, and the other end is connected to the air duct between the wind wheel and the heat exchanger.

10. A HVAC equipment, characterized in that: include: The indoor unit according to any one of claims 1 to 9; as well as The outdoor unit forms a circulation loop with the indoor unit.

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