CN216620053U - Indoor unit of air conditioner - Google Patents

Abstract

The utility model discloses an indoor unit of an air conditioner, which comprises a shell, a heat exchanger, a water pan and a water supply device, wherein the shell is provided with an air inlet, and a filter screen is arranged at the air inlet; the heat exchanger is arranged in the shell; the water receiving tray is arranged below the heat exchanger and is provided with a water storage tank, the water storage tank is used for collecting condensed water falling from the heat exchanger to the water receiving tray, and a water outlet is formed in the circumferential wall of the water storage tank; the water supply device is arranged in the shell and comprises a water tank and a water pump, the water pump is used for sending condensed water in the water storage tank into the water tank, and the condensed water in the water tank is used for cleaning the filter screen and/or the heat exchanger. The air-conditioning indoor unit can supply water to the water tank, and meanwhile, the arrangement of a drain pipe of the air-conditioning indoor unit can be prevented from being changed.

Description

Indoor unit of air conditioner

Technical Field

The utility model relates to the technical field of air conditioners, in particular to an indoor unit of an air conditioner.

Background

The condensed water produced by the indoor unit of the air conditioner in the process of refrigeration can drop to the water pan positioned below the heat exchanger, and the condensed water can be discharged to the outside through the water outlet on the water pan and the water discharge pipe communicated with the water outlet. In the related technology, the water tank is arranged in the air-conditioning indoor unit and is communicated with the water outlet on the water receiving disc directly or through the water pump so as to collect condensed water generated in the refrigeration process, so that the condensed water in the water tank can be used for cleaning a filter screen and/or a heat exchanger of the air-conditioning indoor unit, and the air-conditioning indoor unit can have a self-cleaning function. However, because the water outlet on the water receiving tray is used for supplying water for the water tank, and the condensed water in the water tank can become dirty and needs to be discharged after the filter screen and/or the heat exchanger are cleaned, at the moment, a drain pipe for communicating the outdoor water tank with the water tank is directly arranged, dirty water is discharged to the outdoor through the drain pipe, or a drain outlet is additionally arranged on the water receiving tray and is communicated with the drain pipe, and the dirty water is discharged to the outdoor through the drain outlet and the drain pipe. Both of these methods result in the change of the arrangement of the drain pipe, which usually needs to extend from the inside of the indoor unit of the air conditioner to the outside, and the change of the arrangement of the drain pipe results in the change of the arrangement of the indoor unit of the air conditioner and the change of the installation of the indoor unit of the air conditioner.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide an air conditioner indoor unit, which can supply water to a water tank and simultaneously avoid changing the arrangement of a drain pipe of the air conditioner indoor unit.

In order to achieve the above object, an indoor unit of an air conditioner according to the present invention includes:

the air inlet is provided with a filter screen;

the heat exchanger is arranged in the shell;

the water receiving tray is arranged below the heat exchanger and provided with a water storage tank, the water storage tank is used for collecting condensed water falling from the heat exchanger to the water receiving tray, and a water outlet is formed in the circumferential wall of the water storage tank; and

the water supply device is arranged in the shell and comprises a water tank and a water pump, the water pump is used for sending the condensed water in the water storage tank into the water tank, and the condensed water in the water tank is used for cleaning the filter screen and/or the heat exchanger.

In one embodiment, the water tank is provided with a water outlet, and condensed water in the water tank can be discharged to the water receiving tray through the water outlet.

In an embodiment, the water supply device further comprises a filter for filtering the condensed water before the condensed water enters the water tank.

In one embodiment, the filter element is positioned between the water pump and the water storage tank, the height of the lowest horizontal point of the water storage tank, which is lower than the water outlet, is 8-10 mm, and the height of the water inlet of the filter element, which is higher than the lowest horizontal point of the water storage tank, is 2-5 mm.

In one embodiment, the filter element is located between the water pump and the water storage tank, and the water outlet of the filter element is detachably connected with the water inlet of the water pump.

In one embodiment, the water outlet of the filter element is in threaded connection with the water inlet of the water pump; and/or

The filtering piece is in a long strip shape and extends along the up-down direction of the indoor unit of the air conditioner.

In one embodiment, the housing includes a face frame and a panel, the face frame has a mounting/dismounting opening for mounting/dismounting the filter element, and the panel is movably disposed on the face frame to expose or shield the mounting/dismounting opening.

In an embodiment, the housing further comprises a switch board, and the switch board is detachably connected with the face frame to open or close the dismounting opening.

In an embodiment, in the opposite two sides of the switch board, one side is provided with a U-shaped elastic buckle, the other side is provided with a barb, the dismounting opening is provided with a first clamping groove corresponding to the edge of the U-shaped elastic buckle, the dismounting opening is provided with a second clamping groove corresponding to the edge of the barb, the U-shaped elastic buckle is connected with the first clamping groove in a clamping manner, and the barb is connected with the second clamping groove in a clamping manner.

In one embodiment, the switch plate has a first spigot with a step shape, and the edge of the dismounting and mounting opening has a second spigot with a step shape, and the first spigot and the second spigot are matched to form a seal with the edge of the switch plate at the edge of the dismounting and mounting opening.

In one embodiment, the water outlet is provided with a water outlet pipe, the water outlet of the water outlet pipe is positioned on one side of the water storage tank with the water outlet, and the water outlet is closer to the bottom of the water storage tank relative to the water outlet of the water outlet pipe in the extending direction of the circumferential wall of the water storage tank.

In one embodiment, in the direction from top to bottom, the water storage capacity of the unit height of the water tank decreases progressively, and the water outlet is located at the lowest position of the water tank.

In one embodiment, the bottom of the water tank is provided with a lower bottom plate and a liquid guide plate, the liquid guide plate is inclined outwards relative to the lower bottom plate, the lower side of the liquid guide plate is connected with the lower bottom plate, and the water outlet is positioned on the lower bottom plate.

In one embodiment, the outer surface of the liquid guide plate is provided with a plurality of supporting plates which are arranged at intervals, and the end surface of the free end of each supporting plate is flush with the outer surface of the lower bottom plate.

In an embodiment, the bottom of the water tank is further provided with an upper bottom plate and a connecting plate, the upper bottom plate is located above the lower bottom plate, the connecting plate is connected with the upper bottom plate and the lower bottom plate, and at least part of the water pump is accommodated in an avoiding space defined by the connecting plate and the upper bottom plate.

In one embodiment, the air conditioning indoor unit further includes a self-cleaning mechanism including a driving member driving the filter screen to move and a cleaning member for cleaning the filter screen when the filter screen moves to the water tank.

In above-mentioned air conditioning indoor set, through forming the catch basin on the water collector, the catch basin can gather the comdenstion water that drops to the water collector from the heat exchanger to can be through supplying water for the water tank by the catch basin, and the outlet on the water collector can be after air conditioning indoor set opens self-cleaning function, will wash the filter screen and/or the heat exchanger after the comdenstion water that becomes dirty discharges outside air conditioning indoor set, also can be after the comdenstion water in the catch basin reaches certain degree of depth, discharge the comdenstion water that is clean relatively. Therefore, the air-conditioning indoor unit can supply water to the water tank, and simultaneously can avoid changing the arrangement of the water outlet of the air-conditioning indoor unit, namely can avoid changing the arrangement of the water outlet pipe of the air-conditioning indoor unit.

The utility model also provides a self-cleaning control method of the air conditioner, the air conditioner indoor unit of the air conditioner comprises a water pan, a water tank and a water pump, the water pan is provided with a water storage tank, the circumferential wall of the water storage tank is provided with a water outlet, the water pump is used for sending condensed water in the water storage tank into the water tank, and the self-cleaning control method of the air conditioner comprises the following steps:

acquiring the water quantity in the water tank and the accumulated running time of the air conditioner;

and when the water amount reaches the preset total water amount and the accumulated running time reaches the preset time, starting the self-cleaning function.

In one embodiment, the step of obtaining the amount of water in the water tank comprises the steps of:

acquiring a difference value between the temperature of a heat exchanger of the air conditioner in a refrigeration mode and the return air temperature and the single-time running time of the air conditioner in the refrigeration mode;

when the difference is more than 5 ℃ and the single-time operation time is more than or equal to 4 hours, the water amount in the water storage tank reaches the preset water dividing amount, and a primary water pump is started; and

when the number of times of starting the water pump reaches the preset starting number, the water amount in the water tank reaches the preset total water amount.

In one embodiment, the step of obtaining the amount of water in the water tank comprises the steps of:

acquiring the current humidity and the difference value between the temperature of a heat exchanger of the air conditioner in a refrigeration mode and the return air temperature;

determining the water storage time when the water quantity of the water storage tank reaches the preset water distribution quantity according to the current humidity and the difference value;

starting the water pump once every interval of water storage time; and

when the number of times of starting the water pump reaches the preset starting number, the water amount in the water tank reaches the preset total water amount.

In one embodiment, in the step of determining the water storage time when the water amount of the water storage tank reaches the preset water dividing amount according to the current humidity and the difference value:

when the current humidity is 70-85% and the difference is 2-5 ℃, the water storage time is 2 hours;

when the current humidity is 70-85% and the difference is more than 5 ℃, the water storage time is 1 hour;

when the current humidity is more than 85 percent and the difference value is 2-5 ℃, the water storage time is 1 hour;

when the current humidity is more than 85 percent and the difference value is more than 5 ℃, the water storage time is 0.5 hour.

In one embodiment, the predetermined time period is 18 hours.

In one embodiment, the water tank has a water outlet, the water tank is provided with an electromagnetic valve for controlling the opening or closing of the water outlet, when the water outlet is opened, condensed water in the water tank is discharged to the water pan, and the self-cleaning control method of the air conditioner further comprises the following steps:

after the self-cleaning function is finished, the electromagnetic valve is controlled to open the water outlet of the water tank.

In one embodiment, the air conditioner indoor unit further includes a filter member for filtering the condensed water before the condensed water enters the water tank, and the self-cleaning control method of the air conditioner further includes the steps of:

acquiring the opening times of the electromagnetic valve; and

when the opening times of the electromagnetic valve is more than or equal to the preset opening times, the reminding information of replacing the filter piece is sent.

When the water quantity in the water tank does not reach the preset total water quantity, if the self-cleaning function is started, the situation that self-cleaning is incomplete due to insufficient water quantity can occur, namely the situation of invalid self-cleaning can occur; when the accumulated running time of the air conditioner does not reach the preset time, the filter screen and/or the heat exchanger are/is cleaner, and if the self-cleaning function is started, the condition of invalid self-cleaning can also occur. In the self-cleaning control method of the air conditioner, the conditions for starting the self-cleaning function are set as that the water amount in the water tank reaches the preset total water amount and the accumulated operation time of the air conditioner reaches the preset time length, so that the condition of invalid self-cleaning can be avoided, and the self-cleaning is effective each time. That is, the self-cleaning control method of the air conditioner has the function of automatically starting the self-cleaning function and also has the function of effectively self-cleaning each time of self-cleaning.

Drawings

In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the embodiments or technical solutions of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic cross-sectional view of an indoor unit of an air conditioner according to an embodiment of the present invention;

fig. 2 is a schematic partial perspective view of an indoor unit of an air conditioner according to an embodiment of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is an enlarged view of a portion of FIG. 2 at B;

fig. 5 is a schematic perspective view of an inner side of a partial casing of an indoor unit of an air conditioner according to an embodiment of the present invention;

FIG. 6 is an enlarged view of a portion of FIG. 5 at C;

FIG. 7 is an enlarged view of a portion of FIG. 5 at D;

fig. 8 is a flowchart illustrating a self-cleaning control method of an air conditioner according to an embodiment of the present invention;

FIG. 9 is a flowchart of an embodiment of step S510 in FIG. 8;

fig. 10 is a flowchart of another embodiment of step S510 in fig. 8.

The reference numbers illustrate:

the implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture, and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, if appearing throughout the text, "and/or" is meant to include three juxtaposed aspects, taking "A and/or B" as an example, including either the A aspect, or the B aspect, or both A and B satisfied aspects. In addition, technical solutions between the embodiments may be combined with each other, but must be based on the realization of the technical solutions by a person skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides an indoor unit of an air conditioner.

In the embodiment of the present invention, as shown in fig. 1 and 2, the indoor unit 10 of an air conditioner includes a casing 200, a heat exchanger, a water receiving tray 300, and a water supply device 400.

The housing 200 has an intake opening (return air opening) 202 and an outlet opening 204. A filter screen is arranged at the air inlet 202.

The heat exchanger is provided in the case 200. Indoor air enters the shell 200 through the air inlet (air return inlet) 202, and the air entering the shell 200 exchanges heat with the heat exchanger and then is discharged into the room through the air outlet 204, so that the purpose of adjusting the indoor temperature is achieved.

The drip pan 300 is disposed in the housing 200 and below the heat exchanger. The drip tray 300 has a reservoir 302. The catch basin 302 is used to collect the condensate that falls from the heat exchanger to the drip tray 300. In practical applications, when the indoor unit 10 of the air conditioner is in the cooling mode, the heat exchanger is an evaporator, and the temperature of the evaporator is lower than that of the air in the air inlet 202, so that after the air enters the casing 200 through the air inlet 202 and exchanges heat with the evaporator, water vapor in the air forms condensed water on the evaporator, and the formed condensed water can fall to the water pan 300 through the heat exchanger. Specifically, in the actual manufacturing process, the water tray 300 is stamped to form the water storage tank 302.

A water outlet 304 is arranged on the circumferential wall of the water storage tank 302, and the water outlet 304 is communicated with the water storage tank 302. Thus, when the condensed water in the reservoir 302 reaches a certain depth, the condensed water can be discharged out of the indoor unit 10 through the drain opening 304. In practical applications, the condensed water can be discharged to the outside by providing a drain pipe in communication with the drain port 304 and placing the outlet end of the drain pipe outside.

Specifically, in this embodiment, the height of the lowest horizontal point of the reservoir 302 below the drain opening 304 is 8mm to 10mm, wherein the height of the lowest horizontal point of the reservoir 302 below the drain opening 304 may be 8mm, 9mm, or 10 mm. In this way, a certain amount of water in the reservoir 302 can be ensured. It should be noted that, in the present embodiment, the bottom of the reservoir tank 302 is substantially a plane structure, and the lowest horizontal point of the reservoir tank 302 means that the bottom of the reservoir tank 302 is 8mm to 10mm lower than the drain opening 304. It should also be noted that the planar structure may have concave and convex points, that is, the planar structure may not be smooth, but the concave and convex points have negligible influence on the water storage capacity of the water storage tank 302.

The water supply device 400 is provided in the housing 200. The water supply device 400 includes a water tank 410 and a water pump 420. The water tank 410 is used for containing condensed water for cleaning the filter screen and/or the heat exchanger. The water pump 420 is used for pumping the condensed water in the reservoir 302 into the water tank 410. The condensed water in the water tank 410 is used to clean a filter screen and/or a heat exchanger. Specifically, in this embodiment, the water pump 420 is a self-priming pump.

In the related art, a water tank is arranged in the air-conditioning indoor unit, the water tank is directly communicated with a water outlet on a water receiving disc or is communicated with the water outlet on the water receiving disc through a water pump so as to collect condensed water generated in the refrigeration process, so that a filter screen and/or a heat exchanger of the air-conditioning indoor unit can be cleaned by the condensed water in the water tank, and the air-conditioning indoor unit can have a self-cleaning function. However, because the water outlet on the water receiving tray is used for supplying water for the water tank, and the condensed water in the water tank can become dirty and needs to be discharged after the filter screen and/or the heat exchanger are cleaned, at the moment, a drain pipe for communicating the outdoor water tank with the water tank is directly arranged, dirty water is discharged to the outdoor through the drain pipe, or a drain outlet is additionally arranged on the water receiving tray and is communicated with the drain pipe, and the dirty water is discharged to the outdoor through the drain outlet and the drain pipe. Both of these two methods result in the change of the arrangement of the drain pipe, which usually needs to extend from the inside of the indoor unit of the air conditioner to the outside, and the change of the arrangement of the drain pipe results in the change of the arrangement of the indoor unit of the air conditioner and the change of the installation of the indoor unit of the air conditioner.

In the above air-conditioning indoor unit 10, the water storage tank 302 is formed on the water receiving tray 300, so that the water storage tank 302 can collect the condensed water falling from the heat exchanger to the water receiving tray 300, and thus the water tank 410 can be supplied with water through the water storage tank 302, and further the filter screen and/or the heat exchanger of the air-conditioning indoor unit 10 can be cleaned by the condensed water in the water tank 410, so that the air-conditioning indoor unit 10 has a self-cleaning function. The drainage port 304 on the water pan 300 may drain the dirty condensed water after the filter screen and/or the heat exchanger are cleaned after the air-conditioning indoor unit 10 completes the self-cleaning function, or may drain relatively clean condensed water after the condensed water in the water storage tank 302 reaches a certain depth. Therefore, the indoor unit 10 can supply water to the water tank 410, and simultaneously, the arrangement of the water outlet 304 of the indoor unit 10, that is, the arrangement of the water outlet pipe of the indoor unit 10, can be prevented from being changed.

In this embodiment, the water tank 410 has a water discharge outlet 412, and condensed water in the water tank 410 can be discharged to the drip tray 300 through the water discharge outlet. Specifically, in the present embodiment, the discharge outlet 412 is located at the bottom of the water tank 410. In this manner, it is ensured that the water in the water tank 410 can be substantially completely discharged. It is understood that in other embodiments, the outlet 412 may be provided on a side wall of the tank 410.

In this embodiment, the water tank 410 is provided with an electromagnetic valve 410a for controlling the opening or closing of the water discharge opening 412, and when the electromagnetic valve 410a opens the water discharge opening 412, the condensed water in the water tank 410 is discharged to the water tray 300 through the water discharge opening 412. The solenoid valve 410a is very convenient for automatically controlling the opening or closing of the discharge port 412, that is, the solenoid valve 410a may be regarded as an automatic valve. It will be appreciated that in other embodiments, a manual valve may be provided to manually open or close the discharge outlet 412.

In some embodiments, after the self-cleaning function of the indoor air conditioning unit 10 is turned on, the jet pump of the self-cleaning mechanism sucks the condensed water in the water tank 410, and sprays the condensed water to the filter screen and/or the heat exchanger to wash away impurities such as dust on the filter screen and/or the heat exchanger, at this time, it may be considered that the self-cleaning mechanism of the indoor air conditioning unit 10 cleans the filter screen and/or the heat exchanger in a jet manner, and the dirty condensed water after cleaning the filter screen and/or the heat exchanger falls onto the water receiving tray 300 and then enters the water storage tank 302.

In some embodiments, when the self-cleaning function of the air conditioning indoor unit 10 is turned on, the driving member of the self-cleaning mechanism drives the filter screen to move, and the cleaning member of the self-cleaning mechanism is used to clean the filter screen when the filter screen moves to the water tank 410. Specifically, in this embodiment, the driving member of the self-cleaning mechanism drives the filter screen to move, so that different portions of the filter screen sequentially enter the water tank 410, and the cleaning member (e.g., a brush) of the self-cleaning mechanism is soaked with water to scrub the filter screen, so as to wash away impurities such as dust on the filter screen, at this time, the self-cleaning mechanism of the indoor unit 10 of the air conditioner may be considered to wash the filter screen in a scrubbing manner, after the filter screen is cleaned, the condensed water in the water tank 410 may become dirty, and the dirty condensed water in the water tank 410 may also enter the water storage tank 302 after being discharged to the water receiving tray 300.

In order to provide better cleanliness to the condensed water delivered into the water tank 410 by the water pump 420, in the present embodiment, the water supply device 400 further includes a filter 430 for filtering the condensed water before the condensed water enters the water tank 410.

It will be appreciated that the volume of the water tank 410 will be greater than the volume of the reservoir 302. In this embodiment, the volume of the water tank 410 is at least 3 times the volume of the reservoir 302. Therefore, after the dirty condensed water in the water tank 410 is drained to the water receiving tray 300, most of the condensed water is directly drained out of the indoor unit 10 of the air conditioner through the drain port 304. After most of dirty water is drained, at this time, the water storage tank 302 is in a state of full water storage, if the indoor unit 10 of the air conditioner is in a cooling state at this time, new condensate water generated will drip into the water storage tank 302 and drain some dirty water in the water storage tank 302, and before the water pump 420 sucks the condensate water in the water storage tank 302, the condensate water in the water storage tank 302 is updated, so that the condensate water in the water storage tank 302 can be purified, and the condensate water in the water storage tank 302 is relatively clean. While the water pump 420 pumps the condensed water in the reservoir 302, the filter 430 may filter the condensed water before the condensed water in the reservoir 302 enters the water tank 410, thereby purifying the condensed water in the reservoir 302 and making the condensed water entering the water tank 410 clean.

That is, in this embodiment, although the condensed water may become dirty after cleaning the filter screen and/or the heat exchanger, and the dirty water discharged into the water storage tank 302 may contaminate the condensed water in the water storage tank 302, since the condensed water in the water storage tank 302 may be updated when the air conditioning indoor unit 10 is in a cooling state, the condensed water in the water storage tank 302 may be relatively clean, and the filter 430 may further purify the condensed water, so that the condensed water entering the water tank 410 may be clean, and thus the filter screen and/or the heat exchanger cleaned by the condensed water may be relatively clean.

In this embodiment, the filter 430 is located between the water pump 420 and the water storage tank 302, and at this time, the water outlet of the filter 430 may be directly connected to the water inlet of the water pump 420, and the water outlet of the filter 430 may be connected to the water inlet of the water pump 420 through a pipe. Thus, the water pump 420 can be prevented from being polluted and/or corroded by dirty water, and the filter element 430 is more convenient to replace because the filter element 430 is located between the water pump 420 and the water storage tank 302, when replacing the filter element 430, the filter element 430 is separated from the water pump 420, and when the filter element 430 is located between the water pump 420 and the water tank 410, when replacing the filter element 430, the filter element 430 needs to be separated from the water pump 420, and the filter element 430 needs to be separated from the water tank 410. It is understood that in other embodiments, the filter 430 may be located between the water pump 420 and the water tank 410.

In this embodiment, the outlet of the filter 430 is connected to the inlet of the water pump 420. That is, in the present embodiment, the filter 430 is directly connected to the water pump 420, and no additional pipe is required between the filter 430 and the water pump 420. It is understood that in other embodiments, the water outlet of the filter element 430 and the water inlet of the water pump 420 may be connected by a pipe. Specifically, in the present embodiment, the water outlet of the filter 430 is detachably connected to the water inlet of the water pump 420. In this manner, better filtering 430 is facilitated. More specifically, in the present embodiment, the water outlet of the filter 430 is threadedly coupled to the water inlet of the water pump 420. In this embodiment, the outer wall of the water outlet of the filter 430 has external threads, and the inner wall of the water inlet of the water pump 420 has internal threads.

In this embodiment, the height of the water inlet of the filter 430 above the lowest horizontal point of the reservoir 302 is 2mm to 5mm, wherein the height of the water inlet of the filter 430 above the lowest horizontal point of the reservoir 302 may be 2mm, 3mm, 4mm, or 5 mm. That is, in the present embodiment, the filter member 430 is directly connected to the reservoir 302, and no additional pipe is required between the filter member 430 and the reservoir 302. It will be appreciated that in other embodiments, the filter element 430 and reservoir 302 may be connected by a conduit. The water inlet of the filtering piece 430 is 2mm-5mm higher than the lowest horizontal point of the water storage tank 302, so that the water pump 420 can suck the condensed water in the water storage tank 302 completely.

In this embodiment, the filter 430 is a PP (polypropylene) fiber meltblown filter. The PP fiber melt-blown filter element can filter impurities such as silt, suspended matters and colloid in water, and can also cover impurities possibly existing in condensed water, and the PP fiber melt-blown filter element has long service life and low cost, so that the preferable filter element 430 is the PP fiber melt-blown filter element. It is understood that in other embodiments, the filter element 430 may be an activated carbon filter element with low maintenance cost, and the filter element 430 may be an RO (Reverse Osmosis) filter element with good filtering effect.

In the present embodiment, the filter member 430 has a long bar shape and extends in the up-down direction of the air conditioning indoor unit 10. The filter member 430 has a long bar shape, which is more advantageous for replacing the filter member 430, and when the indoor unit 10 is a wall-mounted indoor unit, the water supply device 400 is usually disposed at an end portion of the indoor unit 10 (left end or right end of the wall-mounted indoor unit after being hung on a wall), and the filter member 430 has a long bar shape and extends in an up-down direction of the indoor unit 10, which is more advantageous for utilizing a space in the up-down direction of the indoor unit 10.

Specifically, in the present embodiment, the water tank 410 is located above the filter 430. At least a portion of the water pump 420 is located between the water tank 410 and the filter 430. In this way, the space in the vertical direction of the air conditioning indoor unit 10 is advantageously used.

In the present embodiment, the housing 200 includes a face frame 210 and a panel. The air inlet 202 and the air outlet 204 are positioned on the face frame 210, and the heat exchanger, the water pan 300 and the water supply device 400 are all arranged in the face frame 210. The face frame 210 has a mounting/dismounting opening 212. The mounting/dismounting port 212 is used for mounting/dismounting the filter member 430. The panel is movably disposed on the surface frame 210 to expose or shield the assembling/disassembling opening 212. Thus, when the panel is opened to expose the mounting/dismounting hole 212, the filter member 430 can be mounted/dismounted through the mounting/dismounting hole 212, and when the panel is closed to expose the mounting/dismounting hole 212, dust and the like can be prevented from entering the face frame 210 through the mounting/dismounting hole 212, that is, the panel can protect the devices in the face frame 210.

In the present embodiment, the housing 200 further includes a switch plate 220. The switch plate 220 is detachably coupled to the face frame 210 to open or close the removal/installation hole 212. The switch board 220 can further prevent dust and the like from entering the face frame 210 through the mounting/dismounting opening 212, that is, the switch board 220 can further protect the devices in the face frame 210.

In the present embodiment, as shown in fig. 2 to 7, of the opposite sides of the switch board 220, one side is provided with a U-shaped snap 222, and the other side is provided with a barb 224. The removal opening 212 has a first engaging groove 212a corresponding to the edge of the U-shaped latch 222, and the removal opening 212 has a second engaging groove 212b corresponding to the edge of the barb 224. The U-shaped elastic buckle 222 is clamped with the first clamping groove 212a, and the barb 224 is clamped with the second clamping groove 212 b. Thus, the switch plate 220 can be quickly disassembled, and the filter 430 can be quickly disassembled. Specifically, in the present embodiment, the U-shaped snaps 222 and the barbs 224 are respectively positioned on the upper and lower sides of the switch board 220.

In the present embodiment, the switch plate 220 has a first stop 226 having a step shape, the edge of the dismounting opening 212 has a second stop 212c having a step shape, and the first stop 226 and the second stop 212c cooperate to form a seal between the edge of the dismounting opening 212 and the edge of the switch plate 220. Thus, the switch board 220 can further prevent dust and the like from entering the face frame 210 through the mounting/dismounting opening 212, that is, the switch board 220 can further protect the devices in the face frame 210.

In the present embodiment, as shown in fig. 1, the discharge port 412 is provided with a discharge pipe 410 b. The discharge tube 410b has an outlet 414. In this embodiment, the solenoid valve 410a is disposed at the outlet 414 of the discharge pipe 410 b. The outlet 414 of the discharge tube 410b is located on the side of the reservoir 302 having the drain opening 304, and the drain opening 304 is located closer to the bottom of the reservoir 302 than the outlet 414 of the discharge tube 410b in the extending direction of the circumferential wall of the reservoir 302. In this way, when dirty water in the water tank 410 is drained, the dirty water may flow to the drain opening 304 along the circumferential wall of the water storage tank 302 having the drain opening 304 and be directly drained out of the indoor unit 10 of the air conditioner through the drain opening 304, so that the dirty water entering the water storage tank 302 may be reduced, and the condensate water in the water storage tank 302 may have relatively high cleanliness.

In this embodiment, the water storage amount per unit height of the water tank 410 decreases in the top-down direction, and the water outlet 412 is located at the lowest position of the water tank 410. Therefore, the dirty water in the water tank 410 can be drained conveniently, and the dirty water in the water tank 410 can be drained cleanly.

In this embodiment, the bottom of the water tank 410 has a lower plate 411 and a liquid guide plate 413, the liquid guide plate 413 is inclined outward relative to the lower plate 411, the lower side of the liquid guide plate 413 is connected to the lower plate 413, and the water outlet 412 is located on the lower plate 411. Therefore, the water storage amount of the water tank 410 at the unit height is decreased in the direction from top to bottom, and the lower bottom plate 411 can be beneficial to the stable placement of the water tank 410 on a table top or a table top. In the present embodiment, the bottom of the water tank 410 has a lower bottom plate 411 and a liquid guide plate 413, and in this case, the bottom of the water tank 410 may be considered as a trapezoid with a large top and a small bottom. It is understood that in other embodiments, the bottom of the water tank 410 may also have two liquid guiding plates 413 disposed at an included angle, and in this case, the bottom of the water tank 410 in the heat tile may be tapered with a large top and a small bottom.

In this embodiment, the outer surface of the liquid guiding plate 413 is provided with a plurality of supporting plates 415 arranged at intervals, and the end surface of the free end of the supporting plate 415 is flush with the outer surface of the lower plate 411, that is, the end surface of the supporting plate 415 far away from the liquid guiding plate 413 is flush with the outer surface of the lower plate 411. The plurality of supporting plates 415 arranged at intervals are beneficial to stably placing the water tank 410 on a table top or a table top, and can avoid overlarge weight of the water tank 410. It is understood that in other embodiments, a support block may be provided on the outer surface of the fluid guide 413.

In this embodiment, the bottom of the water tank 410 further has an upper bottom plate 417 and a connecting plate 419, wherein the upper bottom plate 417 is located above the lower bottom plate 411, and the connecting plate 419 connects the upper bottom plate 417 with the lower bottom plate 411. Therefore, the dirty water in the water tank 410 can be drained conveniently, and the dirty water in the water tank 410 can be drained cleanly.

In this embodiment, the connecting plate 419 and the upper plate 417 define an escape space 419a outside the water tank 410. At least a portion of the water pump 420 is housed in the escape space 419 a. In this way, the space in the vertical direction of the air conditioning indoor unit 10 can be used more favorably. As shown in fig. 8, the present invention further provides a self-cleaning control method of an air conditioner, wherein the air conditioner includes an indoor air conditioner unit, the indoor air conditioner unit includes a water pan, a water tank, and a water pump, the water pan has a water storage tank, a water discharge port is formed on a circumferential wall of the water storage tank, the water tank is used for containing condensed water for cleaning a filter screen of the indoor air conditioner unit and/or a heat exchanger of the indoor air conditioner unit, the water pump is used for sending the condensed water in the water storage tank into the water tank, and the self-cleaning control method of the air conditioner includes the following steps:

step S510, obtaining the water amount in the water tank and the accumulated operation time of the air conditioner.

Step S520, when the water amount in the water tank reaches the preset total water amount and the accumulated operation time of the air conditioner reaches the preset time length, the self-cleaning function is started. That is, in this embodiment, when the water amount in the water tank does not reach the preset total water amount or the accumulated operation time of the air conditioner does not reach the preset time period, the self-cleaning function is not turned on.

Specifically, in the present embodiment, the preset total water amount is the water amount when the water tank is full of water, and the preset time period is 18 hours. It is understood that in other embodiments, the preset total water amount may be smaller than the water amount when the water tank is full, and the preset time period may be any integer from 19 hours to 30 hours.

Specifically, in this embodiment, after the air conditioning indoor unit starts the self-cleaning function, the driving mechanism of the self-cleaning mechanism drives the filter screen to move, so that different parts of the filter screen sequentially enter the water tank, and the brush of the self-cleaning mechanism is dipped with water to scrub the filter screen, so as to flush away impurities such as dust on the filter screen.

In the self-cleaning control method of the air conditioner, when the water quantity in the water tank does not reach the preset total water quantity, if the self-cleaning function is started, the situation that self-cleaning is incomplete due to insufficient water quantity can occur, namely the situation of ineffective self-cleaning can occur; when the accumulated running time of the air conditioner does not reach the preset time, the filter screen and/or the heat exchanger are/is cleaner, and if the self-cleaning function is started, the condition of invalid self-cleaning can also occur. In the self-cleaning control method of the air conditioner, the conditions for starting the self-cleaning function are set as that the water amount in the water tank reaches the preset total water amount and the accumulated operation time of the air conditioner reaches the preset time length, so that the condition of invalid self-cleaning can be avoided, and the self-cleaning is effective each time. That is, the self-cleaning control method of the air conditioner has the function of automatically starting the self-cleaning function and also has the function of effectively self-cleaning each time of self-cleaning.

In some embodiments, as shown in fig. 9, step S510 includes the following steps:

step S512, acquiring the difference between the temperature of a heat exchanger of the air conditioner in the refrigeration mode and the return air temperature and the single-time running time of the air conditioner in the refrigeration mode;

step S514, when the difference is more than 5 ℃ and the single-time operation time is more than or equal to 4 hours, the water amount in the water storage tank reaches the preset water dividing amount, and a primary water pump is started;

step S516, when the number of times of starting the water pump reaches the preset starting number, the water amount in the water tank reaches the preset total water amount.

In this embodiment, the difference between the temperature of the heat exchanger of the air conditioner in the refrigeration mode and the return air temperature is greater than 5 ℃ and the single-time operation time of the air conditioner in the refrigeration mode is greater than or equal to 4 hours, the water storage tank can store full water, and at the moment, the water volume of the water storage tank when the water storage tank stores full water is the preset water distribution volume. Thus, frequent turning on of the water pump can be avoided. It will be appreciated that in other embodiments the predetermined amount of water dispensed may be less than the amount of water when the reservoir is full.

In this embodiment, if the water tank capacity is set to S, the water amount when the reservoir is full of water is x, and the water absorption amount when the water pump is turned on once is x, when the water pump is turned on for a number of times P equal to or greater than S/x, it is determined that the water tank is full of water. At this time, the water amount when the water storage tank is full of water is the preset water dividing amount, that is, x is the preset water dividing amount, and the water amount when the water storage tank is full of water is the preset total water amount, that is, S is the preset total water amount. In this way, a sufficient amount of water per self-cleaning can be ensured. It will be appreciated that in other embodiments, the predetermined total volume of water may be less than the volume of water when the tank is full.

In the above embodiment, whether the water amount in the water storage tank reaches the preset water dividing amount is judged by judging whether the single operation time of the air conditioner in the refrigeration mode is longer than or equal to 4 hours by judging whether the difference value between the temperature of the heat exchanger of the air conditioner in the refrigeration mode and the return air temperature is larger than 5 ℃, and whether the water pump is started is further judged, and in the process of judging whether the water pump is started, the water pump can be controlled to be started without adding an additional water level switch, namely, the function of automatic water absorption of the water pump can be realized.

In some embodiments, as shown in fig. 10, step S510 includes the following steps:

step S512a, acquiring the current humidity and the difference between the temperature of the heat exchanger of the air conditioner in the refrigeration mode and the return air temperature;

step S514a, determining the water storage time when the water quantity of the water storage tank reaches the preset water distribution quantity according to the current humidity and the difference value;

step S516a, starting the water pump once every interval of water storage duration;

in step S518a, when the number of times the water pump is turned on reaches the preset number of times, the amount of water in the water tank reaches the preset total amount of water.

In this embodiment, the preset water diversion amount is the amount of water when the water storage tank is full of water. Thus, frequent turning on of the water pump can be avoided. It will be appreciated that in other embodiments the predetermined amount of water dispensed may be less than the amount of water when the reservoir is full.

In this embodiment, the water storage period is an operation period of the air conditioner in the cooling mode.

In the above embodiment, the water storage time when the water quantity of the water storage tank reaches the preset water distribution quantity is determined by the current humidity and the difference value between the temperature of the heat exchanger of the air conditioner in the refrigeration mode and the return air temperature, and then whether the water pump is started is judged according to the water storage time.

Specifically, in the step of determining the water storage time period when the water storage amount of the water storage tank reaches the preset value according to the current humidity and the difference value, that is, in the step S514 a:

when the current humidity is 70-85% and the difference is 2-5 ℃, the water storage time is 2 hours;

when the current humidity is 70-85% and the difference is more than 5 ℃, the water storage time is 1 hour;

when the current humidity is more than 85 percent and the difference value is 2-5 ℃, the water storage time is 1 hour;

when the current humidity is more than 85 percent and the difference value is more than 5 ℃, the water storage time is 0.5 hour.

In the embodiment, when the current humidity is 70-85%, the difference is 2-5 ℃, and the air conditioner in the refrigeration mode operates for 2 hours (namely, the water storage time is 2 hours), the water amount of the water storage tank reaches the preset water dividing amount; when the current humidity is 70-85%, the difference is more than 5 ℃, and the air conditioner in the refrigeration mode operates for 1 hour (namely the water storage time is 1 hour), the water quantity of the water storage tank reaches the preset water distribution quantity. When the current humidity is more than 85 percent, the difference value is 2-5 ℃, and the air conditioner in the refrigeration mode operates for 1 hour (namely the water storage time is 1 hour), the water quantity of the water storage tank reaches the preset water distribution quantity. When the current humidity is greater than 85%, the difference is greater than 5 ℃, and the air conditioner in the refrigeration mode operates for 0.5 hour (namely the water storage time is 0.5 hour), the water quantity of the water storage tank reaches the preset water distribution quantity.

In the present embodiment, the water tank has a discharge outlet 412, and a solenoid valve 410a for controlling the opening or closing of the discharge outlet 412 is provided on the water tank. When the drain outlet 412 is opened, the condensed water in the water tank is discharged to the water receiving tray. In this embodiment, the self-cleaning control method of the air conditioner further includes the steps of:

in step S530, after the self-cleaning function is completed, the solenoid valve 410a is controlled to open the water outlet 412 of the water tank.

After being discharged through the water outlet 412, the condensed water in the water tank is discharged to the water receiving tray and then discharged to the outside of the air conditioner indoor unit through the water storage tank and the water outlet on the water receiving tray.

In this embodiment, the air conditioning indoor unit further includes a filter member for filtering the condensed water before the condensed water enters the water tank. In this embodiment, the self-cleaning control method of the air conditioner further includes the steps of:

step S540, acquiring the number of times of opening the electromagnetic valve 410 a;

in step S550, when the opening times of the electromagnetic valve 410a is greater than or equal to the preset opening times, a prompt message for replacing the filter is sent.

In the above embodiment, the number of times of opening of the electromagnetic valve 410a is obtained, and when the number of times of opening of the electromagnetic valve 410a is greater than or equal to the preset number of times of opening, the filter element replacement is prompted, and the filter element replacement prompting function can be realized without setting a detection sensor.

Specifically, in the present embodiment, the preset opening times are determined according to Y/S, where Y is the effective usage flow rate of the filter, and can be obtained by searching the product specification of the filter, and can also be obtained by empirical estimation, and S is the preset total water amount of the water tank.

Factors influencing the service life of the filter element include water quality, flow, operation time and the like, the design life of the general purification filter element is 6 months, the quality of the recovered condensed water is poor, and the purification filter element is likely to be replaced in less than 6 months, so that the service flow of the filter element (the total flow of the purified water is S x Q, S is the preset total water quantity of the water tank, and Q is the opening times of the electromagnetic valve 410 a) is detected as the standard for evaluating whether the filter element needs to be replaced, the effective service flow of the filter element is Y under the service condition of the recovered condensed water, when the opening times Q of the electromagnetic valve 410a is more than or equal to Y/S, the filter element is considered to reach the upper limit of effective use at the moment, and a user is reminded to replace the filter element. This process need not set up the detection sensor and can realize that the filter core is changed and remind the function.

The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (16)

1. An indoor unit of an air conditioner, comprising:

the air inlet is provided with a filter screen;

the heat exchanger is arranged in the shell;

the water receiving tray is arranged below the heat exchanger and provided with a water storage tank, the water storage tank is used for collecting condensed water falling from the heat exchanger to the water receiving tray, and a water outlet is formed in the circumferential wall of the water storage tank; and

the water supply device is arranged in the shell and comprises a water tank and a water pump, the water pump is used for sending the condensed water in the water storage tank into the water tank, and the condensed water in the water tank is used for cleaning the filter screen and/or the heat exchanger.

2. An indoor unit of an air conditioner as claimed in claim 1, wherein the water tank has a discharge outlet through which condensed water in the water tank can be discharged to the drip tray.

3. An indoor unit of an air conditioner according to claim 1, wherein the water supply means further comprises a filter member for filtering the condensed water before the condensed water enters the water tank.

4. The indoor unit of an air conditioner according to claim 3, wherein the filter member is located between the water pump and the reservoir, the height of the reservoir from the lowest horizontal point below the drain port is 8mm to 10mm, and the inlet of the filter member is 2mm to 5mm above the lowest horizontal point of the reservoir.

5. The indoor unit of claim 3, wherein the filter member is disposed between the water pump and the reservoir, and the outlet of the filter member is detachably connected to the inlet of the water pump.

6. The indoor unit of an air conditioner according to claim 5, wherein the outlet of the filter member is screw-coupled to the inlet of the water pump; and/or

The filtering piece is in a long strip shape and extends along the up-down direction of the indoor unit of the air conditioner.

7. An indoor unit of an air conditioner according to claim 5, wherein the casing includes a face frame having an attaching/detaching opening for attaching/detaching the filter member, and a face plate movably provided on the face frame to expose/shield the attaching/detaching opening.

8. The indoor unit of claim 7, wherein the casing further comprises a switch plate detachably coupled to the face frame to open or close the attachment/detachment port.

9. The indoor unit of an air conditioner as claimed in claim 8, wherein a U-shaped elastic buckle is provided at one side of the opposite sides of the switch board, and a barb is provided at the other side, the disassembly and assembly port has a first engaging groove corresponding to an edge of the U-shaped elastic buckle, the disassembly and assembly port has a second engaging groove corresponding to an edge of the barb, the U-shaped elastic buckle engages with the first engaging groove, and the barb engages with the second engaging groove.

10. The indoor unit of an air conditioner according to claim 9, wherein the switching plate has a first jaw having a stepped shape, and an edge of the attachment/detachment port has a second jaw having a stepped shape, and the first jaw and the second jaw are engaged to form a seal with the edge of the switching plate at the edge of the attachment/detachment port.

11. The indoor unit of an air conditioner according to claim 2, wherein the discharge port is provided with a discharge pipe, a water outlet of the discharge pipe is located on a side of the reservoir tank where the water discharge port is provided, and the water discharge port is located closer to a bottom of the reservoir tank than the water outlet of the discharge pipe in an extending direction of a circumferential wall of the reservoir tank.

12. An indoor unit of an air conditioner as claimed in claim 2, wherein the water storage capacity per unit height of the water tank is decreased in a direction from top to bottom, and the discharge port is located at a lowest position of the water tank.

13. An indoor unit of an air conditioner according to claim 12, wherein the bottom of the water tank has a lower plate and a liquid guide plate inclined outwardly with respect to the lower plate, and a lower side of the liquid guide plate is connected to the lower plate, and the discharge outlet is formed on the lower plate.

14. The indoor unit of claim 13, wherein the outer surface of the liquid guide plate is provided with a plurality of support plates arranged at intervals, and the end surfaces of the free ends of the support plates are flush with the outer surface of the lower base plate.

15. The indoor unit of an air conditioner according to claim 13, wherein the bottom of the water tank further has an upper bottom plate and a connecting plate, the upper bottom plate is positioned above the lower bottom plate, the connecting plate connects the upper bottom plate and the lower bottom plate, and at least a part of the water pump is accommodated in an escape space defined by the connecting plate and the upper bottom plate.

16. An indoor unit of an air conditioner according to any one of claims 1 to 15, further comprising a self-cleaning mechanism including a driving member that drives the filter screen to move and a cleaning member for cleaning the filter screen when the filter screen moves to the water tank.

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