Self-cleaning wall-mounted air conditioner indoor unit and working method thereof

Abstract

The invention discloses a self-cleaning wall-mounted air conditioner indoor unit and a working method thereof, and belongs to the field of air conditioners, the indoor unit comprises an evaporator arranged in a machine shell and a return air inlet panel arranged on the machine shell, a water tank used for receiving condensate water is arranged at the position, below the evaporator, of the machine shell, and a lifting water pump is arranged in the water tank; the return air inlet panel comprises blades which are stacked in a tile mode, flushing pipes for receiving water from the lifting water pump are arranged on the blades, and water spraying holes aligned to gaps between the adjacent blades are formed in the flushing pipes. The water tank can collect condensate water dripping from an evaporator, the lifting water pump can pump the condensate water to the flushing pipes on the blades, the condensate water is sprayed to gaps between the adjacent blades from the water spraying holes, the stacked blades serving as filter screens can be flushed, the workload of cleaning the filter screens of the air conditioner indoor unit is reduced, the air conditioner indoor unit can be maintained more easily, and the service life of the air conditioner indoor unit is prolonged. And the air conditioner can maintain a good working state.

Description

Technical Field

[0001] The invention relates to a self-cleaning wall-mounted air-conditioning indoor unit and a working method thereof, belonging to the field of air-conditioning. Background Art

[0002] Some animals have a weaker adaptability to temperature, so it is necessary to adjust the ambient temperature of the farm through equipment such as central air conditioning to ensure their healthy growth and improve production efficiency. For example, poultry is sensitive to temperature changes, especially chickens. High temperatures in summer may cause heat stroke or death in chickens. The suitable growth temperature range for pigs is relatively narrow, especially for piglets and fattening pigs. High temperatures will suppress the appetite of pigs, affect weight gain and reproduction. Dairy cows are very sensitive to heat stress. When the temperature exceeds a certain limit, the milk production of dairy cows will drop significantly and may cause health problems.

[0003] The return air vents of indoor air conditioners used in farms are more likely to be clogged than those used by humans. After analysis, it was found that the things that clog the return air vents are mainly feed debris mixed with grease, animal hair, and environmental dust. The reason is that animal skin usually secretes a certain amount of sebum, which is part of the skin protection mechanism to help prevent hair from drying and protect the skin. Compared with humans, pigs, chickens, and cows secrete more sebum and have more hair. These oils fall into the environment with the hair when the animals are active. Animal feed often contains high levels of oil or fat components (such as soybean oil, rapeseed oil, animal fat, etc.) to promote the growth of animals. Feed will produce some debris during feeding or transportation. Tiny particles, dust, etc. produced by drying animal dandruff, hair, and feces, as well as feed debris, are raised and float in the air when the animals are active, and are easily sucked into the filter of the return air vent of the indoor air conditioner.

[0004] In order to extend the service life of the air conditioner and ensure the temperature control effect, the return air outlet of the air conditioner indoor unit needs to be cleaned in time. However, the time from the last cleaning to the next blockage of the air conditioner indoor unit in the farm is significantly faster than that of the air conditioner used by humans. The number of air conditioner indoor units used in the farm is also large, and it is obviously inconvenient to frequently remove the filter for cleaning, which brings great difficulties to the maintenance of the central air conditioner in the farm. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, the present invention provides a self-cleaning wall-mounted air-conditioner indoor unit and a working method thereof, which can conveniently perform self-cleaning by utilizing condensed water.

[0006] The technical solution adopted by the present invention to solve its technical problem is: In a first aspect, the present application provides a self-cleaning wall-mounted air-conditioning indoor unit, comprising an evaporator arranged in a casing and a return air outlet panel arranged on the casing, the casing being provided with a water tank for receiving condensed water below the evaporator, a lifting water pump being provided in the water tank, the return air outlet panel comprising tile-like stacked leaves, a flushing pipe for receiving water from the lifting water pump being provided on the leaves, and a water spray hole being provided on the flushing pipe so as to be aligned with the gaps between adjacent leaves.

[0007] The self-cleaning wall-mounted air-conditioning indoor unit provided in the present application utilizes tile-like stacked leaves as a filter in front of the evaporator; water vapor in the air is cooled and liquefied when passing through the evaporator, and the water tank can collect condensed water dripping from the evaporator. The lifting water pump can pump the condensed water to the flushing pipes on each leaf, and the condensed water is sprayed from the water spray holes to the gaps between adjacent leaves, so that the stacked leaves serving as the filter can be self-cleaned.

[0008] If the position and direction of the water spray holes are not restricted to a certain extent, the condensed water used to flush the leaves will easily splash outward.

[0009] To this end, the present application optimizes the leaf structure. Furthermore, the leaf includes a downwardly inclined water guide portion and a bent portion connected under the water guide portion and folded upward, a water trough is formed at the connection between the water guide portion and the bent portion, and the end of the water trough is discharged into the trough; the flushing pipe is arranged on the water guide portion, and the water spray hole is downwardly aligned with the outward side of the water guide portion.

[0010] The connection between the water guide part and the bent part forms a water groove on the upper side, and the lower side serves as the lowest point of a single leaf. The flushing pipe on the leaf itself flushes the gap between the current leaf and the next leaf. The flushing water stays at the lowest point of the current leaf and then falls into the water groove of the next leaf, and then is discharged to the sink from the end of the water groove, which is helpful to avoid the flushing water splashing outward or toward the evaporator, and to recover the water that has flushed the leaves for repeated flushing.

[0011] Furthermore, the structure of the water return from the water trough to the water sink is further optimized to minimize the splashing of the returned water to other parts of the indoor unit and to avoid long-term water accumulation in parts other than the water sink.

[0012] The return air vent panel includes an inclined plate, a leaf mounting frame is provided on the inclined plate, the end of the leaf is connected to the leaf mounting frame, a water hole connected to the water trough is provided on the leaf mounting frame, the water hole is located behind the return air vent panel, the inclined plate is inclined downward and the bottom end is connected to the front edge of the water trough.

[0013] After the water in the water trough flows to the end of the leaf, it flows out from the water hole, then flows to the inclined plate, and returns to the water trough through the inclined plate. The entire return water channel is smooth, avoiding splashing when returning water.

[0014] No filter can be completely selective. The condensed water falling from the evaporator may already be mixed with impurities such as dust, fiber, hair, and debris. The water that has already washed the leaves may be even worse, which will affect the cleanliness of the cleaning.

[0015] Furthermore, a baffle is provided in the water tank to separate the water tank into a front tank and a rear tank, the baffle is connected to a guide plate to guide the condensed water of the evaporator to the front tank, and an overflow filter hole is provided on the upper part of the baffle; the lifting water pump is arranged in the rear tank.

[0016] The condensed water dripping from the evaporator flows to the front trough through the guide plate, and the water that has flushed the leaves flows to the front trough through the inclined plate. The liquid level in the front trough rises to the overflow filter hole and overflows to the rear trough. The water that can flow to the rear trough is all water filtered through the overflow filter hole, and the cleanliness level is improved. The flushing water is supplied by the rear trough, which is beneficial to improve the cleaning efficiency and greatly reduce the risk of clogging of the water spray holes.

[0017] Furthermore, an electric heating component is arranged in the rear tank. The filter screen of the indoor unit of the air conditioner used in the farm is usually adhered with grease. Heating the water in the rear tank first and then conveying it for flushing is conducive to washing away the grease on the leaf sheet and reducing the adhesion of the leaf sheet to impurities.

[0018] Furthermore, a discharge water pump is arranged in the front tank, and the discharge water pump is connected to a discharge pipe, and the discharge pipe extends outward through the housing. After flushing for a certain time or a certain number of times, the discharge water pump can be used to pump away all the water in the front tank together with the impurities, for example, to the wastewater channel of the farm for treatment.

[0019] Furthermore, a first liquid level switch connected to the discharge water pump signal is arranged in the front tank, and a triggering liquid level of the first liquid level switch is not lower than the overflow filter hole and not higher than the baffle.

[0020] Furthermore, a second liquid level switch connected to the lift water pump signal is provided in the rear tank, and a triggering liquid level of the second liquid level switch is lower than the overflow filter hole.

[0021] Furthermore, the self-cleaning wall-mounted air conditioner indoor unit further comprises a fan and an air outlet, wherein the air outlet is higher than the fan, and the fan is higher than the evaporator and the return air outlet. The water tank is located at the lowest position of the entire indoor unit, which is conducive to collecting water and reducing liquid splashing to other parts of the indoor unit.

[0022] In a second aspect, the present application provides a working method for a self-cleaning wall-mounted air-conditioning indoor unit as described in the first aspect, wherein after working for a preset time or when the liquid level in the water tank reaches a preset height, the lifting water pump pumps the water in the water tank to the flushing pipe, and the flushing pipe sprays water from the water spray hole toward the gap between adjacent leaves.

[0023] The beneficial effects of the present invention are as follows: the self-cleaning wall-mounted air-conditioning indoor unit of the present invention utilizes tile-like stacked leaves as the filter in front of the evaporator, utilizes a water tank to collect condensed water dripping from the evaporator, and then utilizes a lifting water pump to pump the condensed water to the flushing pipes on each leaf, and the condensed water is sprayed from the water spray holes to the gaps between adjacent leaves, which can flush the stacked leaves serving as the filter, thereby reducing the workload of cleaning the filter of the air-conditioning indoor unit, facilitating simpler maintenance of the air-conditioning indoor unit, and facilitating the air-conditioning indoor unit to maintain a good working condition.

[0024] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or understood by practicing the present application. The purpose and other advantages of the present application can be realized and obtained by the structures particularly pointed out in the written description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional schematic diagram of a self-cleaning wall-mounted air-conditioning indoor unit provided in an embodiment of the present application.

[0026] Figure 2 It is a cross-sectional view of a self-cleaning wall-mounted air conditioner indoor unit provided in an embodiment of the present application.

[0027] Figure 3 It is a schematic diagram of the internal structure of a self-cleaning wall-mounted air-conditioning indoor unit provided in an embodiment of the present application.

[0028] Figure 4 This is a diagram showing the positional relationship between the evaporator, water tank, and return air vent panel.

[0029] Figure 5 It is a structural diagram of components related to the storage and transportation of condensed water.

[0030] Figure 6 yes Figure 5 Enlarged view of point A in the middle.

[0031] Figure 7 yes Figure 5 Enlarged view of point B in the middle.

[0032] Figure 8 It is a schematic diagram of the structure of the sink and return air vent panel.

[0033] Fig. 9 yes Figure 8Enlarged view of point C in the middle.

[0034] Fig.10 This is a diagram showing the relationship between the positions of the pages arranged below and the sink.

[0035] Fig.11 yes Fig.10 Enlarged view of point D in the middle.

[0036] Figure numerals: 1. casing; 10. water tank; 101. inclined water baffle; 11. front tank; 12. rear tank; 13. baffle; 131. overflow filter hole; 14. guide plate; 17. discharge water pump; 171. discharge pipe; 18. electric heating component; 19. lifting water pump; 198. main water supply pipe; 199. branch water supply pipe; 2. return air vent panel; 20. leaf; 21. flushing pipe; 211. water spray hole; 22. water guide part; 23. bending part; 24. water trough; 26. inclined plate; 27. first liquid level switch; 28. leaf mounting frame; 281. water hole; 29. ​​second liquid level switch; 3. evaporator; 38. refrigerant liquid pipe; 39. refrigerant gas pipe; 4. fan; 5. air outlet; 6. controller. DETAILED DESCRIPTION

[0037] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0038] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed.

[0039] The present invention is a wall-mounted air conditioner indoor unit. For the convenience of description, except for the "front" and "back" indicating the order of steps, the other "front" and "back" describing the directions are all based on the direction close to the wall as "back" and the direction facing outward as "front".

[0040] Reference Figure 1 , Figure 2 , Figure 3 , Fig.10 and Fig.11The embodiment of the present application provides a self-cleaning wall-mounted air conditioner indoor unit, including an evaporator 3 arranged in a casing 1 and a return air vent panel 2 arranged on the casing 1, the casing 1 is provided with a water tank 10 for receiving condensed water below the evaporator 3, a lifting water pump 19 is arranged in the water tank 10, the return air vent panel 2 includes tile-like stacked leaves 20, the leaves 20 are provided with a flushing pipe 21 for receiving water from the lifting water pump 19, and the flushing pipe 21 is provided with a water spray hole 211 aimed at the gap between adjacent leaves 20.

[0041] The tile-like stacked sheets 20 constitute the filter screen of the indoor unit. Figure 2 It can be analyzed that the projection of the stacked sheets 20 toward the wall is continuous and uninterrupted, which is conducive to improving the filtering ability. For the convenience of description, the stacked sheets 20 are referred to as "sheet layers" below. Figure 2 It can be seen that the evaporator 3 and the leaf layer are inclined downward and backward, and the evaporator 3 and the leaf layer are parallel and close to each other, which is conducive to forcing the air passing through the return air outlet to pass through the evaporator, and is conducive to the water on the evaporator and the leaf falling into the water tank 10.

[0042] The working method of the self-cleaning wall-mounted air conditioner indoor unit is as follows: after working for a preset time or when the liquid level in the water tank 10 reaches a preset height, the lifting water pump 19 pumps the water in the water tank 10 to the flushing pipe 21, and the flushing pipe 21 sprays water from the water spray hole 211 toward the gap between adjacent leaves 20.

[0043] Reference Fig.10 The leaf piece 20 includes a water guide portion 22 inclined downward and a bending portion 23 connected under the water guide portion 22 and bent upward, a water trough 24 is formed at the connection between the water guide portion 22 and the bending portion 23, and the end of the water trough 24 is discharged to the water tank 10; the flushing pipe 21 is arranged on the water guide portion 22, and the water spray hole 211 is downwardly aligned with the outward side of the water guide portion 22.

[0044] The cross-section of the leaf 20 is hook-shaped. The connection between the water guide 22 and the bending part 23 forms a water channel 24 on the upper side, and the lower side is the lowest point of the single leaf 20. In the upper and lower adjacent leafs, the distance between the water guides 22 and the water guides 22 is smaller than the distance between the bending parts 23 and the bending parts 23. The stacking of the water guides 22 and the water guides 22 constitutes the most important structure for filtering solid impurities in the air. The bending part 23 is to form a water channel 24 with the water guide 22 to receive the water falling from the lowest point of the previous leaf 20. There is no water channel 24 below the lowest leaf 20. For this reason, refer to Figure 1 , Fig. 9 and Fig.10 An inclined water baffle 101 is provided at the front edge of the water tank 10 to guide the water falling from the lowest leaf 20 to the water tank 10 .

[0045] The flushing pipe 21 is parallel to the axial direction of the leaf 20 (the direction in which the leaf is stretched into a three-dimensional structure according to the cross-sectional shape, or the direction perpendicular to the cross-sectional shape). In the leaf 20 adjacent to each other, the projection of the water spray hole 211 in the vertical direction is further back than the upper edge of the water guide 22 of the next leaf 20. This is conducive to accurately and powerfully flushing the gap between adjacent water guides 22 and reducing the risk of water splashing outward (forward) or inward (backward).

[0046] Please refer to the internal structure of the self-cleaning wall-mounted air conditioner indoor unit of this embodiment of the application. Figure 2 and Figure 3 , and also includes a fan 4 and an air outlet 5, the air outlet 5 is higher than the fan 4, and the fan 4 is higher than the evaporator 3 and the return air outlet. The water tank 10 is located at the lowest position of the entire indoor unit, which is conducive to collecting the condensed water of the evaporator 3 and the water that has washed the leaf 20, and can prevent the liquid from splashing toward the fan 4.

[0047] Reference Figure 3 , Figure 4 and Figure 5 For example, the structure of the lifting water pump 19 supplying water to the flushing pipe 21, the lifting water pump 19 is connected to an upward main water supply pipe 198, the main water supply pipe 198 branches out into branch water supply pipes 199 at different heights (corresponding to each leaf piece), one end of the flushing pipe 21 is closed, and the other end is connected to the branch water supply pipe 199.

[0048] The structure in which the end of the water trough 24 discharges to the water trough 10 is, for example: the return air outlet panel 2 includes an inclined plate 26, a leaf mounting frame 28 is provided on the inclined plate 26, the end of the leaf 20 is connected to the leaf mounting frame 28, and the leaf mounting frame 28 is provided with a water hole 281 connected to the water trough 24, the water hole 281 is located at the rear of the return air outlet panel 2, the inclined plate 26 is inclined downward and the bottom end is connected to the front edge of the water trough 10.

[0049] Figure 3 and Figure 4 The figure also shows a refrigerant liquid pipe 38 and a refrigerant gas pipe 39 connected to the evaporator 3. Figure 3 The controller 6 of the indoor unit is also drawn. In order to facilitate the flow of condensed water after leaving the evaporator 3, Figure 5 In the process, these structures (including the casing, fan, air outlet, evaporator and its pipes, and controller) were dismantled. Fig.10 Ground Reference Figure 5The return air vent panel 2 includes two inclined plates 26, each of which is provided with a sheet mounting frame 28. The sheet 20 is mounted between the two sheet mounting frames 28, and the two ends of the sheet 20 are connected to a water hole 281. The flushing pipe 21 on the sheet itself flushes the gap between the sheet and the next sheet. The flushing water stays at the lowest point of the sheet and then falls into the water groove 24 of the next sheet, and then flows to the water holes 281 at both ends, and falls on the inclined plate 26 after coming out of the water holes 281, and finally flows back to the water tank 10 along the inclined plate 26.

[0050] Reference Figures 4 to 9 A baffle 13 is provided in the water tank 10 to divide the water tank 10 into a front tank 11 and a rear tank 12. A guide plate 14 is connected to the baffle 13 to guide the condensed water of the evaporator 3 to the front tank 11. An overflow filter hole 131 is provided on the upper part of the baffle 13; a lifting water pump 19 is arranged in the rear tank 12.

[0051] In the illustrated embodiment, the bottom edge of the guide plate 14 is connected to the upper edge of the baffle 13, and the guide plate 14 half surrounds the evaporator 3 at the rear, which is equivalent to the structure composed of the guide plate 14 and the front tank 11 as the bottom of the evaporator 3. The condensed water on the evaporator 3 directly falls into the front tank 11 or flows downward to the front tank 11 through the guide plate 14, and the water falling from the water hole 281 onto the inclined plate 26 also flows downward to the front tank 11 along the inclined plate 26. When the liquid level of the front tank 11 rises to the overflow filter hole 131, the rear tank 12 starts to take in water, and the overflow filter hole 131 can filter most of the impurities in the front tank.

[0052] In order to adapt to the situation that the filter screen of the indoor unit of the farm air conditioner often has grease, in some embodiments, an electric heating component 18 is arranged in the rear tank 12, and the electric heating component 18 can be an electric heating wire. Accordingly, the working method of the self-cleaning wall-mounted air conditioner indoor unit becomes: after working for a preset time or when the liquid level in the water tank 10 reaches a preset height, the electric heating component 18 heats for a certain time (for example, 30 seconds to 120 seconds), and then the water pump 19 is lifted to pump the water in the water tank 10 to the flushing pipe 21, and the flushing pipe 21 sprays water from the water spray hole 211 toward the gap between adjacent leaves 20.

[0053] In the embodiment of controlling the self-cleaning behavior by liquid level, a second liquid level switch 29 connected to the signal of the lifting water pump 19 is provided in the rear tank 12. Accordingly, the working method of the self-cleaning wall-mounted air conditioner indoor unit becomes: when the liquid level of the rear tank 12 reaches the triggering liquid level of the second liquid level switch 29, the lifting water pump 19 pumps the water in the water tank 10 to the flushing pipe 21, and the flushing pipe 21 sprays water toward the gap between adjacent leaves 20 from the water spray hole 211.

[0054] If combined with the heating behavior of the electric heating component, that is: when the liquid level in the rear tank 12 reaches the triggering liquid level of the second liquid level switch 29, the electric heating component 18 heats for a certain period of time, and then the water pump 19 is lifted to pump the water in the water tank 10 to the flushing pipe 21, and the flushing pipe 21 sprays water from the water spray hole 211 toward the gap between adjacent leaves 20.

[0055] After multiple flushings, due to the filtering effect of the overflow filter hole 131, more and more impurities will remain in the front tank 11. The embodiment of the present application is further optimized to automatically remove the impurities in the front tank 11. A discharge water pump 17 is provided in the front tank 11, and the discharge water pump 17 is connected to a discharge pipe 171, which extends outward through the housing 1. That is, the discharge water pump 17 is used to discharge the water in the front tank 11 together with the impurities to the outside (for example, to the sewer).

[0056] The working method of the self-cleaning wall-mounted air conditioner indoor unit is changed to: after working for a preset time or when the liquid level in the water tank 10 reaches a preset height, the lifting water pump 19 pumps the water in the water tank 10 to the flushing pipe 21, and the flushing pipe 21 sprays water from the water spray hole 211 toward the gap between adjacent leaves 20. When working for a specific time, the liquid level in the front tank 11 reaches a specific height, or a certain number of self-cleanings are completed, the discharge water pump 17 discharges the contents in the front tank 11 to the outside.

[0057] In the embodiment of controlling the discharge behavior by liquid level, a first liquid level switch 27 connected to the signal of the discharge water pump 17 is provided in the front tank 11. Accordingly, the working method of the self-cleaning wall-mounted air conditioner indoor unit becomes: after working for a preset time or when the liquid level in the water tank 10 reaches a preset height, the lifting water pump 19 pumps the water in the water tank 10 to the flushing pipe 21, and the flushing pipe 21 sprays water toward the gap between adjacent leaves 20 from the water spray hole 211. When the liquid level in the front tank 11 reaches the triggering liquid level of the first liquid level switch 27, the discharge water pump 17 discharges the contents in the front tank 11 to the outside.

[0058] If the self-cleaning behavior is combined with liquid level control, the working method of the self-cleaning wall-mounted air conditioner indoor unit becomes: when the liquid level of the rear tank 12 reaches the triggering liquid level of the second liquid level switch 29, the lifting water pump 19 pumps the water in the tank 10 to the flushing pipe 21, and the flushing pipe 21 sprays water from the water spray hole 211 toward the gap between adjacent leaves 20. When the liquid level in the front tank 11 reaches the triggering liquid level of the first liquid level switch 27, the discharge water pump 17 discharges the content in the front tank 11 to the outside.

[0059] Preferably, it is necessary to avoid frequent cleaning to increase energy consumption, and the working method of the self-cleaning wall-mounted air conditioner indoor unit is changed to: when the liquid level in the rear tank 12 reaches the triggering liquid level of the second liquid level switch 29, and a period of time (e.g., 20 minutes to 120 minutes) has passed since the last operation of the lifting water pump 19, the lifting water pump 19 pumps the water in the water tank 10 to the flushing pipe 21, and the flushing pipe 21 sprays water from the water spray hole 211 toward the gap between adjacent leaves 20. When the liquid level in the front tank 11 reaches the triggering liquid level of the first liquid level switch 27, the discharge water pump 17 discharges the contents in the front tank 11 to the outside.

[0060] In order to ensure that there is water available in the rear tank, the collected condensed water can be reused a certain number of times. In a preferred embodiment, the triggering liquid level of the first liquid level switch 27 is not lower than the overflow filter hole 131 and not higher than the baffle 13, and the triggering liquid level of the second liquid level switch 29 is lower than the overflow filter hole 131.

[0061] If combined with the heating behavior of the electric heating component, that is, when the liquid level in the rear tank 12 reaches the triggering liquid level of the second liquid level switch 29 and a period of time has passed since the last operation of the lifting water pump 19, the electric heating component 18 heats for a certain period of time, and then the lifting water pump 19 pumps the water in the tank 10 to the flushing pipe 21, and the flushing pipe 21 sprays water from the spray holes 211 toward the gaps between adjacent leaves 20. When the liquid level in the front tank 11 reaches the triggering liquid level of the first liquid level switch 27, the discharge water pump 17 discharges the contents of the front tank 11 to the outside.

[0062] In this method of use, when the liquid level in the rear tank 12 is between the triggering liquid level of the second liquid level switch 29 and the triggering liquid level of the first liquid level switch 27, or when it is about to reach the triggering liquid level of the first liquid level switch 27, the liquid levels in the front tank 11 and the rear tank 12 are the same, and the liquid in the water tank 10 can rely on the overflow filter hole 131 for convection. When the electric heating component 18 is heated, the front tank 11 also enjoys the heating effect, which is conducive to removing the adhesion of some impurities to the water tank wall and facilitating the discharge pump 17 to discharge more impurities.

[0063] In the illustrated embodiment, the lifting water pump 19 and the discharge water pump 17 are arranged on both sides of the evaporator 3, the lifting water pump 19 and the refrigerant liquid pipe 38 and the refrigerant gas pipe 39 are on the same side, and the discharge water pump 17 is on the other side. That is, from the appearance of the indoor unit, two pipes (refrigerant liquid pipe 38 and refrigerant gas pipe 39) extend from one side of the casing 1, and one pipe (discharge pipe 171) extends from the other side, which is conducive to saving the internal space of the indoor unit and distinguishing the refrigerant pipeline and the condensed water pipeline during installation.

[0064] In the description of this specification, the description with reference to the terms "one embodiment", "certain embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0065] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A self-cleaning wall-mounted air conditioner indoor unit, comprising an evaporator (3) arranged in a casing (1) and an air return panel (2) arranged on the casing (1), characterized in that: The casing (1) is provided with a water tank (10) for receiving condensed water below the evaporator (3), a lifting water pump (19) is provided in the water tank (10), the return air vent panel (2) comprises tile-like stacked sheets (20), a flushing pipe (21) for receiving water from the lifting water pump (19) is provided on the sheets (20), and a water spray hole (211) is provided on the flushing pipe (21) that is aligned with the gap between adjacent sheets (20).

2. The self-cleaning wall-mounted air conditioner indoor unit according to claim 1, characterized in that: The leaf sheet (20) comprises a water guide portion (22) inclined downward and a bent portion (23) connected below the water guide portion (22) and bent upward, a water channel (24) being formed at the connection between the water guide portion (22) and the bent portion (23), the end of the water channel (24) being discharged toward the water tank (10); the flushing pipe (21) is arranged on the water guide portion (22), and the water spray hole (211) is downwardly aligned with the outward side of the water guide portion (22).

3. The self-cleaning wall-mounted air conditioner indoor unit according to claim 2, characterized in that: The return air vent panel (2) comprises an inclined plate (26), a leaf plate mounting frame (28) is arranged on the inclined plate (26), an end of the leaf plate (20) is connected to the leaf plate mounting frame (28), a water discharge hole (281) connected to the water discharge groove (24) is arranged on the leaf plate mounting frame (28), the water discharge hole (281) is located at the rear of the return air vent panel (2), the inclined plate (26) is inclined downward and a bottom end is connected to a front edge of the water groove (10).

4. The self-cleaning wall-mounted air conditioner indoor unit according to claim 1 or 3, characterized in that: The water tank (10) is provided with a baffle (13) for dividing the water tank (10) into a front tank (11) and a rear tank (12); the baffle (13) is connected to a guide plate (14) for guiding condensed water from the evaporator (3) to the front tank (11); an overflow filter hole (131) is provided on the upper part of the baffle (13); and the lift water pump (19) is arranged in the rear tank (12).

5. The self-cleaning wall-mounted air conditioner indoor unit according to claim 4, characterized in that: An electric heating component (18) is arranged in the rear groove (12).

6. The self-cleaning wall-mounted air conditioner indoor unit according to claim 4, characterized in that: A discharge water pump (17) is arranged in the front tank (11), the discharge water pump (17) is connected to a discharge pipe (171), and the discharge pipe (171) passes through the casing (1) and extends outward.

7. The self-cleaning wall-mounted air conditioner indoor unit according to claim 6, characterized in that: A first liquid level switch (27) connected to the discharge water pump (17) by signal is arranged in the front tank (11), and a triggering liquid level of the first liquid level switch (27) is not lower than the overflow filter hole (131) and not higher than the baffle (13).

8. The self-cleaning wall-mounted air conditioner indoor unit according to claim 4, characterized in that: A second liquid level switch (29) connected to the lift water pump (19) by signal is arranged in the rear tank (12), and a triggering liquid level of the second liquid level switch (29) is lower than the overflow filter hole (131).

9. The self-cleaning wall-mounted air conditioner indoor unit according to claim 1 or 2, characterized in that: It also includes a fan (4) and an air outlet (5), wherein the air outlet (5) is higher than the fan (4), and the fan (4) is higher than the evaporator (3) and the return air outlet panel (2).

10. A method for operating a self-cleaning wall-mounted air conditioner indoor unit according to any one of claims 1 to 9, characterized in that: After working for a preset time or when the liquid level in the water tank (10) reaches a preset height, the lifting water pump (19) pumps the water in the water tank (10) to the flushing pipe (21), and the flushing pipe (21) sprays water from the water spray holes (211) toward the gaps between adjacent sheets (20).

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