Air conditioner indoor unit

Abstract

This invention provides an air conditioner indoor unit, comprising: a housing assembly having an air supply duct; an air guide plate connected to the housing assembly, the air guide plate being movably disposed and switching between a first position and a third position; a panel assembly connected to the housing assembly, the panel assembly including a return air plate and a return air inlet, the return air plate being movably disposed and switching between an initial position and a return air position; the return air inlet being connected to the air supply duct; and a sterilization device disposed within the air supply duct, the sterilization device being used to release sterilizing substances; when the air conditioner indoor unit is in sterilization mode, the air guide plate is in the first position, and the return air plate is in the return air position, so that the panel assembly and the air guide plate together form a return air duct, allowing the gas flowing out of the first air outlet to flow back to the air supply duct through the return air duct. This air conditioner indoor unit solves the problem in the prior art of odors generated by microorganisms inside the air conditioner being dispersed by the air conditioner's airflow.

Description

Technical Field

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

[0002] During the cooling process of the air conditioner, a large amount of water will condense on the evaporator. Although the air conditioner is equipped with a drain outlet to discharge most of the water inside to the outside, some water will still remain in the heat exchanger and the water tray after the air conditioner is turned off, providing favorable conditions for the growth of microorganisms such as bacteria. After the air conditioner is turned on again, the odor produced by the microorganisms will directly cause discomfort to the human body.

[0003] The prior art provides an air conditioner, in which a negative ion generator is installed at the air inlet. With this arrangement, there is almost no dust in the air passing through the evaporator, thereby improving the air purification ability of the air conditioner indoor unit. However, its effect is limited, and it cannot circulate through other places where normal wind passes, such as the water receiving tray, inside the air conditioner, and the sterilization effect in the air conditioner room is not ideal. In particular, it cannot effectively sterilize mold and the like generated by humidity in the water receiving tray or other corners of the air conditioner indoor unit, thereby causing odor inside the air conditioner. Summary of the invention

[0004] The main purpose of the present invention is to provide an air conditioner indoor unit to solve the problem in the prior art that the odor generated by microorganisms in the air conditioner is dispersed through the air blowing of the air conditioner.

[0005] In order to achieve the above-mentioned purpose, the present invention provides an air-conditioning indoor unit, which has a sterilization mode. The air-conditioning indoor unit comprises: a shell assembly, which has an air supply duct, and the air supply duct has a first air inlet and a first air outlet; an air guide plate, which is connected to the shell assembly, and the air guide plate can be movably arranged, and the air guide plate has a first position and a third position for guiding air, and the air guide plate switches between the first position and the third position; a panel assembly, which is connected to the shell assembly, and the panel assembly comprises a return air plate and a return air outlet, and the return air plate can be movably arranged, and the return air plate It has an initial position for closing the return air outlet and a return air position for opening the return air outlet, and the return air plate switches between the initial position and the return air position; the return air outlet is connected to the supply air duct; a sterilization device is arranged in the supply air duct, and the sterilization device is used to release sterilization substances so that the sterilization substances flow with the gas; when the air conditioner indoor unit is in the sterilization mode, the air guide plate is in the first position, and the return air plate is in the return air position, so that the panel assembly and the air guide plate jointly form a return air duct, so that the gas flowing out of the first air outlet flows back to the supply air duct through the return air duct.

[0006] Furthermore, the panel assembly also includes: a first panel; a second panel, connected to the shell assembly, the second panel and the first panel are spaced apart to form a return air outlet; a return air plate is connected to the second panel; when the air guide plate is in the first position and the return air plate is in the return air position, the return air plate is connected to the air guide plate to form a first air duct wall of the return air duct, and the first panel forms a second air duct wall of the return air duct.

[0007] Furthermore, the return air plate has a first end and a second end that are relatively arranged, the first end of the return air plate is connected to the second panel, and the second end of the return air plate has a first end face, and when the return air plate is in the initial position, the first end face is in contact with the second end face of the first panel; when the return air plate is in the return air position, the first end face is in contact with the first plate surface of the air guide plate.

[0008] Furthermore, the air return plate is connected to the second panel and is rotatably arranged relative to the second panel.

[0009] Furthermore, the air conditioner indoor unit also includes: a rotating shaft, through which the return air plate is connected to the second panel; and a driving member connected to the rotating shaft to drive the rotating shaft to rotate.

[0010] Further, when the return air plate is in the initial position, the first outer side surface of the return air plate is flush with the second outer side surface of the first panel; and / or the first outer side surface is flush with the third outer side surface of the second panel.

[0011] Furthermore, the air guide plate also has a second position, and the air guide plate can be switchably set between the first position, the second position and the third position; when the air guide plate is in the second position, the air guide plate cover is arranged on at least part of the return air plate and the first panel, and the air guide plate closes the first air outlet; when the air guide plate is in the first position and the third position, the air guide plate opens the first air outlet.

[0012] Furthermore, the sterilization device is an ion generator.

[0013] Furthermore, the sterilization device is arranged at the first air outlet.

[0014] Furthermore, the air conditioner indoor unit also includes a heat exchanger, a water collecting pan and a fan. The heat exchanger and the fan are both arranged in the supply air duct, and the water collecting pan is located below the heat exchanger; the fan drives the gas to circulate in the supply air duct and the return air duct so that the gas passes through the heat exchanger and the water collecting pan.

[0015] The air-conditioning indoor unit of the present invention has a sterilization mode. When the air-conditioning indoor unit is in the sterilization mode, the panel assembly and the air guide plate jointly form a return air duct. One end of the return air duct is connected to the first air outlet, and the other end of the return air duct is connected to the supply air duct through the return air outlet, so that the gas flowing out of the first air outlet flows back to the supply air duct through the return air duct, thereby realizing the circulation of gas between the supply air duct and the return air duct; and, after the gas passes through the sterilization device in the supply air duct, it drives the sterilization substance to flow together, and then sterilizes each structure flowing through in the circulation process. The sterilization effect is good, and the dirty and breeding bacteria in the air-conditioning indoor unit can be killed, thereby solving the problem of odor generated by microorganisms in the air conditioner being dissipated through the air of the air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 A schematic diagram showing an embodiment of an air conditioner indoor unit according to the present invention in a sterilization mode is shown;

[0018] Figure 2 A schematic diagram showing an embodiment of an air conditioner indoor unit according to the present invention when it is in a shutdown state;

[0019] Figure 3 A schematic diagram is shown of an embodiment of an air conditioner indoor unit according to the present invention when it is in a cooling (or heating) mode.

[0020] The above drawings include the following reference numerals:

[0021] 10. Shell assembly; 11. Air supply duct; 111. First air inlet; 112. First air outlet; 20. Panel assembly; 21. Air guide plate; 211. First panel surface; 221. First panel; 222. Second panel; 223. Return air plate; 224. First end surface; 226. Second end surface; 227. First outer side surface; 228. Second outer side surface; 229. Third outer side surface; 23. Rotating shaft; 30. Return air duct; 31. Connecting port; 32. Return air outlet; 33. First duct wall; 34. Second duct wall; 40. Sterilization device; 50. Heat exchanger; 60. Water receiving tray; 70. Fan. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0023] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0024] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0025] The present invention provides an air conditioner indoor unit, please refer to Figures 1 to 3 The air conditioner indoor unit has a sterilization mode, and the air conditioner indoor unit includes: a shell assembly 10, having an air supply duct 11, the air supply duct 11 has a first air inlet 111 and a first air outlet 112; an air guide plate 21, connected to the shell assembly 10, the air guide plate 21 is movably arranged, the air guide plate 21 has a first position and a third position for guiding air, and the air guide plate 21 switches between the first position and the third position; a panel assembly 20, connected to the shell assembly 10, the panel assembly 20 includes a return air plate 223 and a return air port 32, the return air plate 223 is movably arranged, and the return air plate 223 has a function of closing the return air port 32 The return air plate 223 switches between the initial position and the return air position; the return air port 32 is connected to the supply air duct 11; the sterilization device 40 is arranged in the supply air duct 11, and the sterilization device 40 is used to release the sterilization substance so that the sterilization substance flows with the gas; when the air-conditioning indoor unit is in the sterilization mode, the air guide plate 21 is in the first position, and the return air plate 223 is in the return air position, so that the panel assembly 20 and the air guide plate 21 jointly form the return air duct 30, so that the gas flowing out of the first air outlet 112 flows back to the supply air duct 11 through the return air duct 30.

[0026] The air-conditioning indoor unit of the present invention has a sterilization mode. When the air-conditioning indoor unit is in the sterilization mode, the panel assembly 20 and the air guide plate 21 jointly form a return air duct 30. One end of the return air duct 30 is connected to the first air outlet 112, and the other end of the return air duct 30 is connected to the supply air duct 11 through the return air outlet 32, so that the gas flowing out of the first air outlet 112 flows back to the supply air duct 11 through the return air duct 30, thereby realizing the circulation of gas between the supply air duct 11 and the return air duct 30; and, after the gas passes through the sterilization device 40 in the supply air duct 11, it drives the sterilization substance to flow together, and then sterilizes each structure flowing through in the circulation process, with good sterilization effect, which can kill dirty and breeding bacteria in the air-conditioning indoor unit, thereby solving the problem of odor generated by microorganisms in the air conditioner being dissipated through the air of the air conditioner.

[0027] Among them, the first side plate and the second side plate of the shell assembly 10 cooperate with the panel assembly 20 and the air guide plate 21 to form a return air duct 30, and the first side plate and the second side plate are arranged opposite to each other and are arranged on opposite sides of the panel assembly 20.

[0028] In this embodiment, the panel assembly 20 further includes: a first panel 221; a second panel 222, connected to the housing assembly 10, the second panel 222 and the first panel 221 are spaced apart to form a return air port 32; a return air plate 223 is connected to the second panel 222; when the air guide plate 21 is in the first position and the return air plate 223 is in the return air position, the return air plate 223 is connected to the air guide plate 21 to form a first air duct wall 33 of the return air duct 30, the first panel 221 forms a second air duct wall 34 of the return air duct 30, and an end of the first panel 221 away from the second panel 222 and an end of the air guide plate 21 connected to the housing assembly 10 form a connecting port 31 of the return air duct 30, and the connecting port 31 is connected to the first air outlet 112. Specifically, the first air duct wall 33 and the second air duct wall 34 are arranged opposite to each other.

[0029] In this embodiment, the return air plate 223 has a first end and a second end that are relatively arranged. The first end of the return air plate 223 is connected to the second panel 222, and the second end of the return air plate 223 has a first end face 224. When the return air plate 223 is in the initial position, the first end face 224 is in contact with the second end face 226 of the first panel 221; when the return air plate 223 is in the return air position, the first end face 224 is in contact with the first plate face 211 of the air guide plate 21.

[0030] Specifically, when the return air plate 223 is in the return air position, the return air port 32 is opened, and the first end surface 224 is in contact with the first panel surface 211 of the air guide plate 21, ensuring that there is no gap at the connection between the air guide plate 21 and the return air plate 223 to avoid gas leakage. When the return air plate 223 is in the initial position, the return air plate 223 and the first panel 221 are only part of the air conditioning panel and do not form a return air duct. The first end surface 224 is in contact with the second end surface 226 of the first panel 221, ensuring that there is no gap at the connection between the first panel 221 and the return air plate 223 to avoid gas leakage.

[0031] Among them, one end of the first panel 221 away from the second panel 222, the end of the air guide plate 21 connected to the shell assembly 10 cooperates with the first side panel and the second side panel to form a connecting opening 31, and the end of the first panel 221 close to the second panel 222, the first end of the return air plate 223 cooperates with the first side panel and the second side panel to form a return air outlet 32.

[0032] Optionally, when the air guide plate 21 is in the first position and the air return plate 223 is in the air return position, the air guide plate 21 abuts against the air return plate 223 .

[0033] Optionally, when the air return plate 223 is in the initial position, the second end of the air return plate 223 abuts against one end of the first panel 221 .

[0034] In this embodiment, the return air plate 223 is connected to the second panel 222 and is rotatably arranged relative to the second panel 222. Such an arrangement enables the position of the return air plate 223 to be switched.

[0035] In this embodiment, the air conditioner indoor unit further includes: a rotating shaft 23, through which the return air plate 223 is connected to the second panel 222; and a driving member connected to the rotating shaft 23 to drive the rotating shaft 23 to rotate. Such an arrangement realizes the rotation of the return air plate 223.

[0036] In one embodiment, the driving member is a motor; of course, the driving member may also be other motion mechanisms, or the driving member includes a motor and a motion mechanism.

[0037] In this embodiment, when the return air plate 223 is in the initial position, the first outer side surface 227 of the return air plate 223 is flush with the second outer side surface 228 of the first panel 221; and / or, the first outer side surface 227 is flush with the third outer side surface 229 of the second panel 222. When the air conditioner indoor unit is not sterilized, the return air plate 223, the first panel 221 and the second panel 222 are used as a plate-shaped whole with a smooth appearance.

[0038] In this embodiment, the air guide plate 21 has a second position, and the air guide plate 21 is switchably set between the first position, the second position and the third position; when the air guide plate 21 is in the second position, the air guide plate 21 covers at least part of the return air plate 223 and the first panel 221, and the air guide plate 21 closes the first air outlet 112; when the air guide plate 21 is in the third position, the air guide plate 21 opens the first air outlet 112. The first position is between the second position and the third position, and the third position is located on the side of the first position away from the first air outlet.

[0039] Specifically, when the air guide plate 21 is in the first position, the air guide plate 21 is used to form the duct wall of the return air duct; when the air guide plate 21 is in the second position, the air guide plate 21 can cover the connection between the first panel 221 and the return air plate 223 to prevent leakage of the connection, ensure the integrity of the appearance, and beautify the appearance. When the air guide plate 21 is in the third position, it can be used as an extension of the air supply duct 11, thereby realizing long-distance air supply, and controlling the airflow direction of the first air outlet 112, playing a guiding role.

[0040] Preferably, when the air guide plate 21 is in the second position, the air guide plate 21 covers at least part of the second panel 222, the first panel 221 and the return air plate 223. Such a setting can cover the connection between the return air plate 223 and the second panel 222 and the connection between the first panel 221 and the return air plate 223, prevent the connection from leaking out, ensure the appearance integrity, and beautify the appearance.

[0041] Specifically, when the air guide plate 21 is in the second position, in addition to covering the first air outlet 112, it can also cover the return air plate 223. When the appearance is closed, the return air plate 223 is invisible, which beautifies the appearance, prevents the air outlet from leaking out, and ensures the integrity of the appearance.

[0042] In this embodiment, the sterilization device 40 is an ion generator, which is used to generate ions.

[0043] In this embodiment, the sterilization device 40 is arranged at the first air outlet 112. Such an arrangement can more easily realize that the sterilizing substance (ions) enter the interior of the housing assembly through the return air duct for sterilization, and can also be more effectively released into the outside (indoor) air for sterilization.

[0044] In this embodiment, the air guide plate 21 is connected to the housing assembly 10 and is rotatably arranged relative to the housing assembly 10. Such an arrangement enables the air guide plate 21 to switch between different positions.

[0045] Specifically, the air guide plate 21 is driven to move by a motor or a motion mechanism.

[0046] In this embodiment, the air conditioner indoor unit also includes a heat exchanger 50, a water collecting pan 60 and a fan 70. The heat exchanger 50 and the fan 70 are both arranged in the supply air duct 11, and the water collecting pan 60 is located below the heat exchanger 50; the fan 70 drives the gas to circulate in the supply air duct 11 and the return air duct 30 so that the gas passes through the heat exchanger 50 and the water collecting pan 60.

[0047] Specifically, the panel assembly 20 and the housing assembly 10 together form a housing chamber of the indoor unit of the air conditioner to accommodate the air supply duct 11, the heat exchanger 50, the water receiving tray 60, the fan 70, etc. Under the action of the fan 70, the indoor air enters the air supply duct 11 from the first air inlet, passes through the heat exchanger 50, and flows out from the first air outlet; and under the action of the fan 70, the air circulates between the air supply duct 11 and the return air duct 30.

[0048] Specifically, when the air conditioner indoor unit is in the sterilization mode, the air guide plate 21, the return air plate 223, the first panel 221, the first side panel, and the second side panel together form a return air duct.

[0049] In this embodiment, when the air guide plate 21 is in the first position and the air return plate 223 is in the air return position, Figure 1 As shown, at this time, the return air duct 30 is formed; when the air guide plate 21 is in the third position, the return air plate 223 is in the initial position, as shown in FIG. Figure 3 As shown, at this time, the air conditioner indoor unit has no return air duct 30, and the air conditioner indoor unit is in cooling (or heating) mode; when the air guide plate 21 is in the second position and the return air plate 223 is in the initial position, as shown in FIG. Figure 2 As shown, at this time, the air conditioner indoor unit has no return air duct 30, and the air conditioner indoor unit is in a shutdown state.

[0050] Specifically, Figure 3 As shown, when the air conditioner indoor unit is in cooling (or heating) mode, the return air plate 223 is in the initial position, and the air guide plate 21 is opened to a predetermined angle. When the fan is running, wind is blown out from the air supply duct to achieve normal cooling or heating; when the ion generator is turned on, ions are released and carried out by the wind to the outside of the air conditioner indoor unit, i.e., indoors, to perform ion sterilization on the indoor air and achieve air purification.

[0051] Specifically, the air conditioner in the prior art has a high concentration of odor due to the growth of bacteria and microorganisms. When the air conditioner is turned on, the odor is easily blown into the room. When the indoor unit of the air conditioner of the present application is turned on or not cooling or heating, it will first be in the return air circulation sterilization state, such as Figure 1As shown, when the air conditioner indoor unit is in the sterilization mode, the air guide plate 21 is in the first position, and the return air plate 223 is in the return air position, and the fan 70 is turned on. At this time, the air flows through the supply air duct 11, the fan 70, the return air duct 30, the supply air duct 11, and the fan 70 to circulate the air flow. At the same time, the ion generator is turned on, and the released ions return to the return air duct 30 with the air flow, and then enter the interior of the shell assembly through the evaporator (i.e., the heat exchanger 50) to perform ion sterilization and purification on the interior of the air conditioner indoor unit. After the air flow inside the air conditioner circulates multiple times, the air conditioner can be switched to the cooling and heating state, and the clean air flow can be blown out.

[0052] During specific implementation, in the sterilization mode, if the wind speed is too fast, it is difficult for the airflow to fully react with the evaporator (i.e., heat exchanger) of the air conditioner indoor unit, the water collection tray and other moist structures containing a large number of bacteria. Therefore, the fan speed should be slower so that the ion wind can fully flow through a large area inside the air conditioner, allowing the air flow to fully contact the parts of the air conditioner indoor unit such as the water collection tray, evaporator and other parts that are easily moistened, thereby increasing the sterilization efficiency and achieving the best sterilization effect.

[0053] In one embodiment, the air conditioner indoor unit is a wall-mounted unit.

[0054] Specifically, one of the main reasons for the air conditioner to produce odor is that the dirt inside the air conditioner breeds bacteria, which leads to the production of moldy odor. The technical problems solved by this application are: the problem of odor produced by microorganisms in the air conditioner being dissipated by the air conditioner; the problem of poor ion sterilization effect; ion sterilization is limited to killing bacteria in the indoor air outside the air conditioner.

[0055] The beneficial effects of the present application are: no odor generated by air-conditioning microorganisms is emitted when the air-conditioning is turned on; the ion generator will not affect the normal air output; the bacteria growing inside the air-conditioning and the bacteria outside the air-conditioning (in the indoor air) can be killed in multiple cycles to achieve all-round sterilization.

[0056] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0057] The air-conditioning indoor unit of the present invention has a sterilization mode. When the air-conditioning indoor unit is in the sterilization mode, the panel assembly 20 and the air guide plate 21 jointly form a return air duct 30. One end of the return air duct 30 is connected to the first air outlet 112, and the other end of the return air duct 30 is connected to the supply air duct 11 through the return air outlet 32, so that the gas flowing out of the first air outlet 112 flows back to the supply air duct 11 through the return air duct 30, thereby realizing the circulation of gas between the supply air duct 11 and the return air duct 30; and, after the gas passes through the sterilization device 40 in the supply air duct 11, it drives the sterilization substance to flow together, and then sterilizes each structure flowing through in the circulation process, with good sterilization effect, which can kill dirty and breeding bacteria in the air-conditioning indoor unit, thereby solving the problem of odor generated by microorganisms in the air conditioner being dissipated through the air of the air conditioner.

[0058] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0059] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An air conditioner indoor unit, characterized in that: The air conditioner indoor unit has a sterilization mode, and the air conditioner indoor unit comprises: The housing assembly (10) has an air supply duct (11), wherein the air supply duct (11) has a first air inlet (111) and a first air outlet (112); an air guide plate (21) connected to the housing assembly (10), the air guide plate (21) being movably arranged, the air guide plate (21) having a first position and a third position for guiding air, the air guide plate (21) switching between the first position and the third position; A panel assembly (20) connected to the housing assembly (10), the panel assembly (20) comprising a return air plate (223) and a return air port (32), the return air plate (223) being movably arranged, the return air plate (223) having an initial position for closing the return air port (32) and a return air position for opening the return air port (32), the return air plate (223) switching between the initial position and the return air position; the return air port (32) being in communication with the air supply duct (11); A sterilizing device (40) is arranged in the air supply duct (11), and the sterilizing device (40) is used to release a sterilizing substance so that the sterilizing substance flows with the gas; The panel assembly (20) further comprises: A first panel (221); A second panel (222) connected to the housing assembly (10), the second panel (222) and the first panel (221) being spaced apart to form the return air port (32); the return air plate (223) being connected to the second panel (222); When the air conditioner indoor unit is in the sterilization mode, the air guide plate (21) is in the first position, and the return air plate (223) is in the return air position, so that the panel assembly (20) and the air guide plate (21) together form a return air duct (30), so that the gas flowing out of the first air outlet (112) flows back to the supply air duct (11) through the return air duct (30); The return air plate (223) is connected to the air guide plate (21) to form a first air duct wall (33) of the return air duct (30), and the first panel (221) forms a second air duct wall (34) of the return air duct (30).

2. The air conditioner indoor unit according to claim 1, characterized in that: The return air plate (223) has a first end and a second end that are arranged opposite to each other. The first end of the return air plate (223) is connected to the second panel (222), and the second end of the return air plate (223) has a first end surface (224). When the return air plate (223) is in the initial position, the first end surface (224) is in contact with the second end surface (226) of the first panel (221); when the return air plate (223) is in the return air position, the first end surface (224) is in contact with the first plate surface (211) of the air guide plate (21).

3. The air conditioner indoor unit according to claim 1, characterized in that: The air return plate (223) is connected to the second panel (222) and is rotatably arranged relative to the second panel (222).

4. The air conditioner indoor unit according to claim 3, characterized in that: The air conditioner indoor unit also includes: A rotating shaft (23), wherein the air return plate (223) is connected to the second panel (222) via the rotating shaft (23); A driving member is connected to the rotating shaft (23) to drive the rotating shaft (23) to rotate.

5. The air conditioner indoor unit according to claim 1, characterized in that: When the return air plate (223) is in the initial position, the first outer side surface (227) of the return air plate (223) is flush with the second outer side surface (228) of the first panel (221); and / or the first outer side surface (227) is flush with the third outer side surface (229) of the second panel (222).

6. The air conditioner indoor unit according to claim 1, characterized in that: The air guide plate (21) also has a second position, and the air guide plate (21) is switchably arranged between the first position, the second position and the third position; when the air guide plate (21) is in the second position, the air guide plate (21) covers at least a portion of the return air plate (223) and the first panel (221), and the air guide plate (21) closes the first air outlet (112); when the air guide plate (21) is in the first position and the third position, the air guide plate (21) opens the first air outlet (112).

7. The air conditioner indoor unit according to any one of claims 1 to 6, characterized in that: The sterilization device (40) is an ion generator.

8. The air conditioner indoor unit according to any one of claims 1 to 6, characterized in that: The sterilization device (40) is arranged at the first air outlet (112).

9. The air conditioner indoor unit according to any one of claims 1 to 6, characterized in that: The air conditioner indoor unit also includes a heat exchanger (50), a water receiving tray (60) and a fan (70); the heat exchanger (50) and the fan (70) are both arranged in the air supply duct (11), and the water receiving tray (60) is located below the heat exchanger (50); the fan (70) drives the gas to circulate in the air supply duct (11) and the return air duct (30), so that the gas passes through the heat exchanger (50) and the water receiving tray (60).

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