Indoor air-conditioning unit, and heating, ventilation and air-conditioning equipment

Abstract

Disclosed in the present application are an indoor air-conditioning unit, and heating, ventilation and air-conditioning equipment. The indoor air-conditioning unit comprises a housing, a heat exchanger and an electric control box, wherein an air duct is provided in the housing, and the housing has a return air vent and an air outlet which are in communication with the air duct; the heat exchanger is arranged in the air duct and has an air intake face; and the electric control box is arranged in the air duct and located between the air intake face and the return air vent, and the electric control box has a first flow guide face configured such that at least part of the airflow in the air duct blowing towards an outer edge of the heat exchanger is directed to the air intake face. The indoor air-conditioning unit thus has reduced noise.

Description

Air conditioning indoor units and HVAC equipment

[0001] This application claims priority to Chinese patent application number 202420586846.7, filed on March 25, 2024, entitled “Air Conditioning Indoor Unit and HVAC Equipment,” the entire contents of which are incorporated herein by reference. Technical Field

[0002] 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

[0003] In the relevant technical field, the existing air conditioner indoor unit is developing towards miniaturization and thinness, which will place a 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. Summary of the Invention

[0004] An embodiment of the present application provides an air conditioner indoor unit with lower noise.

[0005] In the 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 provided 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.

[0006] Based on the air-conditioning indoor unit of the embodiment of the present application, the air flow enters the air duct from the return air inlet and continues to flow in the air duct along the wall of the air duct. When the air flow passes through the electronic control box, the first guide surface guides the air flow, and the first guide surface guides the air flow flowing 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 electronic control box is reduced. Moreover, since the electronic control box has the first guide surface that has a guiding effect on the air flow, the obstruction of the electronic control box to the air flow in the air duct is reduced, thereby improving the aerodynamic efficiency of the air-conditioning indoor unit.

[0007] In some embodiments of the present application, the electric control box is arranged on the top of the inner wall of the air duct.

[0008] 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.

[0009] 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.

[0010] Based on the above embodiment, since the viscosity between the air flow entering the air duct through the return air port and the wall surface of the air duct will cause the air flow to generate turbulence, the air flow enters the air duct through the return air port. As the air flow flows longer in the air duct, the viscosity between the air flow and the inner wall of the air duct and the obstruction of other parts will cause the air flow to generate turbulence. Therefore, setting the first guide surface with a guiding effect closer to the air inlet surface can delay the turbulence of the air flow.

[0011] 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.

[0012] Based on the above embodiment, 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, while the first guide surface is not too large to restrict the shape of the electronic control box.

[0013] 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.

[0014] 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 along the first guide surface to the air inlet surface under the guidance of the first guide surface, further reducing the noise generated when the air conditioner indoor unit is working.

[0015] 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 area of ​​the wind inlet surface.

[0016] Based on the above embodiment, it is ensured that the first guide surface can definitely guide the airflow to the air inlet surface.

[0017] 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°.

[0018] Based on the above embodiment, 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.

[0019] In some embodiments of the present application, a flow guide is further included, which is connected to the shell at the return air port. The flow guide has a second flow guide surface, and the second flow guide surface is parallel to the first flow guide surface.

[0020] Based on the above embodiment, the guiding direction of the second guide surface is the same as that 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.

[0021] In some embodiments of the present application, there are multiple flow guide members, and the guide surfaces on the multiple flow guide members are parallel to each other.

[0022] Based on the above embodiment, setting up multiple guide members can provide a continuous guiding effect, and the guide surfaces on the multiple guide members are parallel to each other so that the airflow always flows in the same direction when passing through these guide surfaces, thereby reducing the generation of airflow disorder and turbulence.

[0023] In some embodiments of the present application, the shell has a receiving groove connected to the air duct, the electric control box is arranged in the receiving groove, and the first guide surface is exposed in the receiving groove through a notch of the receiving groove.

[0024] Based on the above embodiment, the electrical control box is arranged in the receiving groove, which can protect the electrical control box from dust, moisture and other possible damages, thereby improving the durability and reliability of the electrical control box, and the first guide surface is exposed through the notch of the receiving groove, which can effectively guide the airflow to the air inlet surface of the heat exchanger.

[0025] In some embodiments of the present application, the first guide surface is flush with the notch of the accommodating groove.

[0026] Based on the above embodiment, the flushness of the first guide surface with the slot helps to enhance the structural integrity of the entire air duct because it reduces the irregularities inside the air duct, maintains the continuity of the air flow in the air duct, makes the air flow smoother when passing through the air duct, reduces the disorder and turbulence of the air flow, and thus reduces noise.

[0027] In some embodiments of the present application, the outer surface of the electric control box is arranged to fit the wall of the accommodating groove.

[0028] Based on the above embodiments, the displacement or damage of the electric control box in the receiving slot due to vibration or external force is reduced.

[0029] In some embodiments of the present application, the air duct includes a return air section, a heating section, and an air outlet section that are connected in sequence, the return air section is connected to the return air outlet, the air outlet section is connected to the air outlet, the electrical control box is located in the return air section, the first guide surface constitutes the wall of the return air section, and the heat exchanger is fixed in the heating section.

[0030] Based on the above embodiment, by dividing the air duct into a return air section, a heating section, and an outlet section, the airflow path can be optimized, allowing the airflow to enter more smoothly from the return air inlet, be heated or cooled by the heat exchanger in the heating section, and then be discharged from the outlet, thereby improving air flow efficiency. Furthermore, the positions of the electrical control box and the heat exchanger are rationally distributed, and the heat exchanger is fixed within the heating section. This ensures that the airflow has sufficient contact time with the heat exchanger when passing through the heating section, thereby improving heat exchange efficiency. The electrical control box is located within the return air section, and the first guide surface forms the wall of the return air section, which helps to reduce airflow turbulence and turbulence within the air duct, thereby reducing noise.

[0031] In some embodiments of the present application, one end of the heat exchanger is located in the heating section close to the return air section and abuts against the top wall of the heating section, and the other end is located in the heating section close to the air outlet section and abuts against the bottom wall of the heating section.

[0032] Based on the above embodiment, that is, the heat exchanger is arranged tilted, the contact area between the airflow and the surface of the heat exchanger can be increased, thereby improving the heat exchange efficiency.

[0033] In some embodiments of the present application, an extension direction of the return air section forms an angle with an extension direction of the heating section, and an arc-shaped transition is formed between the wall surface of the return air section and the wall surface of the heating section.

[0034] Based on the above embodiments, the arc-shaped transition helps the air flow to flow more smoothly from the return air section to the heating section, and can reduce the turbulence and eddy currents generated when the air flow turns in the air duct, thereby reducing noise and improving the stability of the air flow.

[0035] In some embodiments of the present application, an extension direction of the heating section forms an angle with an extension direction of the air outlet section, and an arc-shaped transition is formed between the wall surface of the heating section and the wall surface of the air outlet section.

[0036] Based on the above embodiment, the arc-shaped transition helps to reduce the turbulence of the airflow when it flows from the heating section to the air outlet section, avoids eddies and turbulence caused by sharp turns, and thus reduces noise.

[0037] In some embodiments of the present application, a ratio of the area of ​​the first guide surface to the area of ​​the outer surface of the electric control box is greater than or equal to 0.1 and less than or equal to 0.25.

[0038] Based on the above embodiment, the shape of the electric control box is not restricted due to the first guide surface being too large, and the airflow guiding effect is not too small due to the first guide surface being too small.

[0039] In some embodiments of the present application, the air-conditioning 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 outlet, and the other end is connected to the air duct between the wind wheel and the heat exchanger.

[0040] 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 air flow 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.

[0041] In some embodiments of the present application, further comprising:

[0042] The liquid storage component has a water storage tank, is arranged on the inner wall surface of the air duct, and is arranged along the width direction of the heat exchanger.

[0043] Based on the above embodiment, the water generated on the heat exchanger will drip or flow along the heat exchanger into the liquid storage member.

[0044] In a second aspect, an embodiment of the present application provides a HVAC device, comprising an outdoor unit and an indoor unit as described above, which forms a circulation loop with the indoor unit.

[0045] 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.

[0046] Based on the air-conditioning indoor unit of the embodiment of the present application, the air flow enters the air duct from the return air inlet and continues to flow in the air duct along the wall of the air duct. When the air flow passes through the electronic control box, the first guide surface guides the air flow, and the first guide surface guides the air flow flowing 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 electronic control box is reduced. Moreover, since the electronic control box has the first guide surface that has a guiding effect on the air flow, the obstruction of the electronic 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

[0047] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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.

[0048] FIG1 is a schematic structural diagram of an air conditioner indoor unit in an embodiment of the present application;

[0049] FIG2 is a CFD (Computational Fluid Dynamics) simulation diagram of the air conditioner indoor unit shown in FIG1 ;

[0050] FIG3 is an enlarged schematic diagram of the structure of section A in FIG1 .

[0051] 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

[0052] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0053] In the relevant technical field, the cabinet of the existing indoor unit is developing towards miniaturization and thinning. Therefore, the electric control box needs to be arranged in the air duct. However, the electric control box is large in size, and the outer contour of the electric control box causes the indoor unit to have large aerodynamic noise.

[0054] In order to solve the above technical problems, please refer to Figures 1 and 2. The first aspect of this application proposes an air-conditioning indoor unit, which includes a shell 10, a heat exchanger 20 and an electric control box 30. The air-conditioning indoor unit has lower noise.

[0055] It is understood that an indoor air conditioner unit and an outdoor air conditioner are used in conjunction with each other. The indoor air conditioner unit is located inside a building and is responsible for providing cool or hot air to the indoor space, while the outdoor air conditioner unit is located outside the building and is responsible for transferring heat or cold air from the indoor space to the outdoors. It is understood that there can be multiple indoor air conditioner units, and multiple indoor air conditioner units can be connected to the same outdoor air conditioner unit; or, there can be multiple outdoor air conditioner units, and multiple outdoor air conditioner units can be connected to the same indoor air conditioner unit.

[0056] Referring to Figure 1 , an air duct 11 is provided in the housing 10 and has a return air port 12 and an air outlet 13 connected to the air duct 11. The heat exchanger 20 is provided in the air duct 11 and has an air inlet surface 21. The electrical control box 30 is provided in the air duct 11 and is located between the air inlet surface 21 and the return air port 12. The electrical control box 30 has a first guide surface 31, which 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.

[0057] The housing 10 is used to enclose an air duct 11 of the air conditioner indoor unit. The housing 10 is connected to a wall or ceiling to secure the air conditioner indoor unit. In the embodiments of the present application, the material, shape, and size of the housing 10 are not limited. It is understood that the shape and size of the housing 10 can be adjusted according to the size and function of the air conditioner indoor unit. When air flows through the air duct 11, it enters the air duct 11 from the return air port 12. When the air flows through the air duct 11, the internal heat exchanger 20 heats or cools the air, and then the air flows out of the air outlet 13 to the indoor room.

[0058] The heat exchanger 20 is used to heat or cool the airflow passing through the heat exchanger 20. It will be appreciated that the heat exchanger 20 also has an air outlet surface 22 disposed opposite the air inlet surface 21. 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, meaning that the heat exchanger 20 only heats the airflow.

[0059] In addition, in order to improve the heat exchange efficiency of the air-conditioning indoor unit, please refer to Figure 1. 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 air flow and the heat exchanger 20, thereby improving the heat exchange rate of the heat exchanger 20 to the air flow.

[0060] Please refer to Figure 1. 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 direction of gravity.

[0061] 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.

[0062] 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 flat surface. 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.

[0063] 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 excessive area of ​​the first guide surface 31, and also avoid the guiding effect of the airflow being too small due to the area of ​​the first guide surface 31 being too small.

[0064] The air duct 11 is used for airflow. It is understood that to reduce noise from the air conditioner indoor unit, the wall surface of the air duct 11 should be smooth and the extension direction of the air duct 11 should be straight to reduce turbulence caused by turns when the air duct 11 flows. If the extension direction of the air duct 11 must bend, the air duct 11 should transition with an arc-shaped wall surface at the bend to reduce turbulence caused by turns when the air duct 11 flows.

[0065] To ensure a reasonable distribution of the heat exchanger 20 and the electrical control box 30 within 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 outlet section, which are sequentially connected. The return air section is connected to the return air port 12, and the outlet section is connected to the outlet 13. The electrical control box 30 is located within the return air section, and the first guide surface 31 forms the wall surface of the return air section. The heat exchanger 20 is fixed within the heating section. In conjunction with the aforementioned tilted arrangement of the heat exchanger 20, one end of the heat exchanger 20 is located at the end of the heating section near the return air section and abuts the top wall of the heating section, while the other end is located at the end of the heating section near the outlet section and abuts the bottom wall of the heating section.

[0066] It can be understood that if the extension direction of the return air 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.

[0067] Based on the air-conditioning indoor unit of the embodiment of the present application, the air flow 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 air flow passes through the electronic control box 30, the air flow is guided by the first guide surface 31. The first guide surface 31 guides the air flow passing 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 air flow, the noise generated by the air flow in the air duct 11 due to the obstruction of the outer contour of the electronic control box 30 is reduced. Moreover, since the electronic control box 30 has the first guide surface 31 that has a guiding effect on the air flow, the obstruction of the electronic control box 30 on the air flow in the air duct 11 is reduced, thereby improving the aerodynamic efficiency of the air-conditioning indoor unit. Please refer to Figure 2 for the specific aerodynamic effect.

[0068] Please refer to Figure 1. 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.

[0069] In other embodiments of the present application, the housing 10 further comprises a receiving slot connected to the air duct 11. The electrical control box 30 is disposed within the receiving slot, with the first guide surface 31 exposed to the outside of the slot through the slot opening. To ensure the smoothness of the wall of the air duct 11, the first guide surface 31 is further aligned with the slot opening of the receiving slot. Furthermore, after the electrical control box 30 is installed within the receiving slot, its outer surface conforms to the slot wall.

[0070] Please refer to Figure 1. 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 flows longer in the air duct 11, 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-conditioning outdoor unit and improve the efficiency of the air-conditioning outdoor unit.

[0071] In some embodiments of the present application, the first guide surface 31 extends in the airflow direction of the air duct 11, and the ratio of the extension dimension d of the first guide surface 31 in the airflow direction of the air duct 11 to the extension dimension l of the air duct 11 in the airflow 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 airflow 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.

[0072] 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, the better the noise reduction effect of the first guide surface 31 on the air conditioner indoor unit, but the length of the electric control box 30 along the air flow direction is required to be longer.

[0073] Please refer to Figure 1. 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. In this way, there is no gap between the first guide surface 31 and the air inlet surface 21. 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.

[0074] 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 large turbulence in the airflow 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.

[0075] As shown in FIG. 1 , 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 .

[0076] Please refer to Figure 1. 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.

[0077] 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 to speed up the efficiency of the airflow through the heat exchanger 20, thereby improving the working efficiency of the air conditioner indoor unit.

[0078] Please refer to Figures 1 and 3. In some embodiments of the present application, a guide member 40 is further included. The guide member 40 is connected to the shell 10 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 guiding action of the second guide surface 41 and the first guide surface 31.

[0079] It can be understood that one flow guide member 40 may have two flow guide surfaces that are parallel to each other, and there may be multiple flow guide members 40 , and the flow guide surfaces on the multiple flow guide members 40 are parallel to each other.

[0080] Please refer to Figure 1. In some embodiments of the present application, the air conditioner indoor unit includes a wind wheel 60, which is arranged behind the heat exchanger 20 along the flow direction of the air flow, and the suction side of the wind wheel 60 faces the heat exchanger 20; the shell 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 wind wheel 60 and the heat exchanger 20.

[0081] 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.

[0082] 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 form a circulation loop with the indoor unit.

[0083] 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.

[0084] 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, they are based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate 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.

[0085] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. An air conditioner indoor unit, wherein: include: The shell has an air duct disposed therein and has an air return port and an air outlet communicated with the air duct; a heat exchanger, disposed in the air duct and having an air inlet surface; as well as An electrical control box is arranged in the air duct and located between the air inlet surface and the return air outlet, wherein the electrical control box has a first guide surface, which 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 conditioning indoor unit according to claim 1, wherein: 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, wherein: The first guide surface is arranged closer to the air inlet surface than the return air port.

4. The air conditioning indoor unit according to claim 3, wherein: 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 conditioning indoor unit according to claim 3, wherein: In the airflow direction of the air duct, the end of the first guide surface abuts against the air inlet surface.

6. The air conditioning indoor unit according to claim 1, wherein: 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, wherein: 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 the angle α is greater than or equal to 85° and less than or equal to 95°.

8. The air conditioning indoor unit according to claim 1, wherein: Also includes: The guide member is connected to the shell at the return air port, and the guide member has a second guide surface, and the second guide surface is parallel to the first guide surface.

9. The air conditioning indoor unit according to claim 8, wherein: There are multiple flow guide members, and the flow guide surfaces on the multiple flow guide members are parallel to each other.

10. The air conditioner indoor unit according to claim 1, wherein: The shell has a receiving groove connected to the air duct, the electric control box is arranged in the receiving groove, and the first guide surface is exposed in the receiving groove through a notch of the receiving groove.

11. The air conditioning indoor unit according to claim 10, wherein: The first guide surface is flush with the notch of the accommodating groove.

12. The air conditioning indoor unit according to claim 10, wherein: The outer surface of the electric control box is arranged to fit the groove wall of the accommodating groove.

13. The air conditioner indoor unit according to claim 1, wherein: The air duct 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 outlet, and the air outlet section is connected to the air outlet. The electrical control box is located in the return air section. The first guide surface constitutes the wall of the return air section. The heat exchanger is fixed in the heating section.

14. The air conditioning indoor unit according to claim 13, wherein: One end of the heat exchanger is located in the heating section close to the return air section and abuts against the top wall of the heating section, and the other end is located in the heating section close to the air outlet section and abuts against the bottom wall of the heating section.

15. The air conditioning indoor unit according to claim 13, wherein: An extension direction of the return air section forms an included angle with an extension direction of the heating section, and an arc-shaped transition is formed between a wall surface of the return air section and a wall surface of the heating section.

16. The air conditioner indoor unit according to claim 13, wherein: An extension direction of the heating section forms an included angle with an extension direction of the air outlet section, and an arc-shaped transition is formed between a wall surface of the heating section and a wall surface of the air outlet section.

17. The air conditioner indoor unit according to claim 1, wherein: The ratio of the area of ​​the first guide surface to the area of ​​the outer surface of the electric control box is greater than or equal to 0.1 and less than or equal to 0.

25.

18. The air conditioner indoor unit according to claim 1, wherein: 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.

19. The air conditioner indoor unit according to claim 1, wherein: Also includes: The liquid storage component has a water storage tank, is arranged on the inner wall surface of the air duct, and is arranged along the width direction of the heat exchanger.

20. A heating and ventilation equipment, wherein: include: The indoor unit according to any one of claims 1 to 19; as well as The outdoor unit forms a circulation loop with the indoor unit.

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