阅读说明：本技术 空调室内机、空调器及空调室内机的控制方法 (Air conditioner indoor unit, air conditioner and control method of air conditioner indoor unit ) 是由 李松 朱华 梁卓文 李超雄 黄招彬 张海强 韩秋菊 余圩钱 张汉平 苑骏 王文江 于 2021-08-17 设计创作，主要内容包括：本申请实施例提供一种空调室内机、空调器及空调室内机的控制方法,空调室内机包括接水盘、排水泵、排水管、水位检测装置和控制装置；接水盘用于盛接冷凝水；排水泵用于排出接水盘内的冷凝水,排水泵包括泵壳、叶轮和切割件,泵壳具有进水口和出水口,进水口和出水口之间形成水流流通路径,叶轮可转动地设置在泵壳内,切割件设置在叶轮上且位于水流流通路径上；排水管的一端与出水口连通,排水管的另一端与外界连通；水位检测装置用于检测接水盘内的水位；控制装置分别与水位检测装置和排水泵信号连接。本申请实施例的空调室内机可以防止排水泵发生阻塞,进而可以提升用户体验。(The embodiment of the application provides an air-conditioning indoor unit, an air conditioner and a control method of the air-conditioning indoor unit, wherein the air-conditioning indoor unit comprises a water pan, a drainage pump, a drainage pipe, a water level detection device and a control device; the water receiving tray is used for containing condensed water; the drainage pump is used for draining condensed water in the water receiving tray and comprises a pump shell, an impeller and a cutting part, wherein the pump shell is provided with a water inlet and a water outlet, a water flow path is formed between the water inlet and the water outlet, the impeller is rotatably arranged in the pump shell, and the cutting part is arranged on the impeller and positioned on the water flow path; one end of the drain pipe is communicated with the water outlet, and the other end of the drain pipe is communicated with the outside; the water level detection device is used for detecting the water level in the water receiving tray; the control device is respectively connected with the water level detection device and the drainage pump through signals. The indoor unit of air conditioner of this application embodiment can prevent that the drain pump from taking place the jam, and then can promote user experience.)

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

the water receiving tray is used for containing condensed water;

a drain pump for draining condensed water from the water collector, the drain pump including a pump housing having a water inlet and a water outlet defining a water flow path therebetween, an impeller rotatably disposed within the pump housing, and a cutter disposed on the impeller and positioned in the water flow path;

one end of the drain pipe is communicated with the water outlet, and the other end of the drain pipe is communicated with the outside;

the water level detection device is used for detecting the water level in the water receiving tray;

and the control device is respectively in signal connection with the water level detection device and the drainage pump.

2. An indoor unit of an air conditioner according to claim 1, wherein the impeller includes a rotary shaft and a blade connected to the rotary shaft, and the cutting member is connected to the rotary shaft; and/or the cutting member is disposed on the blade.

3. An indoor unit of an air conditioner according to claim 2, wherein the cutter is embedded in the rotary shaft, and a blade of the cutter protrudes from an outer surface of the rotary shaft.

4. An indoor unit of an air conditioner according to any one of claims 1 to 3, wherein the blade of the cutting member is any one of a straight blade, a curved blade, a profiled blade and a multi-blade.

5. An air conditioner characterized by comprising the indoor unit of an air conditioner according to any one of claims 1 to 4.

6. An air-conditioning indoor unit control method for the air-conditioning indoor unit according to any one of claims 1 to 4, characterized by comprising:

and under the refrigeration mode, controlling the drainage pump to rotate forwards, reversely or alternatively according to a preset time length so as to perform anti-blocking cleaning on the drainage pump.

7. The control method according to claim 6, characterized in that the method further comprises:

determining the starting of the indoor unit of the air conditioner;

determining that the indoor unit of the air conditioner enters the refrigeration mode;

and controlling the drainage pump to operate positively and negatively or alternatively according to a preset duration.

8. The control method according to claim 6, wherein after controlling the drain pump to operate in a forward rotation, a reverse rotation, or a forward and reverse rotation, the method further comprises:

detecting the water level in the water receiving tray;

and if the water level in the water receiving tray reaches the first water level according to the water level detection result, controlling the drainage pump to operate so as to discharge the condensed water in the water receiving tray.

9. The control method of claim 8, wherein in controlling operation of the drain pump, the method further comprises:

determining that the water level in the water pan is reduced to a second water level according to the water level detection result;

and controlling the drainage pump to stop running, wherein the second water level is lower than the first water level.

10. The control method according to claim 8, characterized in that the method further comprises: and if the water level in the water receiving tray does not reach the first water level and does not drop to the second water level according to the water level detection result, controlling the drainage pump to operate until the water level in the water receiving tray drops to the second water level, wherein the second water level is lower than the first water level.

11. The control method according to claim 9, wherein after controlling the drain pump to stop operating, the method further comprises:

and controlling the drainage pump to run in the direction opposite to the direction before stopping running so as to perform anti-blocking cleaning on the drainage pump.

12. The control method according to claim 6, characterized in that the method further comprises:

detecting the water level in the water receiving tray;

and if the water level in the water receiving tray reaches a first water level according to the water level detection result, controlling the drainage pump to operate until the water level in the water receiving tray is reduced to a second water level, wherein the second water level is lower than the first water level.

13. The control method according to claim 6, characterized in that the method further comprises:

receiving a control instruction for closing the refrigeration mode;

controlling the positive rotation operation, the reverse rotation operation or the positive and negative alternate operation of the drainage pump;

and controlling the drainage pump to stop running and closing the refrigeration mode.

Technical Field

The application relates to the technical field of air conditioners, in particular to an air conditioner indoor unit, an air conditioner and a control method of the air conditioner indoor unit.

Background

In the related art, when the indoor unit of an air conditioner is in a cooling mode, water vapor in air is condensed into condensed water and flows into a water pan of the indoor unit of the air conditioner when the water vapor hits a low-temperature evaporator.

Generally, there are two ways of discharging the condensed water from the drain pan, one is to discharge the condensed water to the outside through a drain pipe at a relatively low position, and the other is to discharge the condensed water to a drain pipe higher than the position where the drain pan is installed through a drain pump, and then discharge the condensed water to the outside through the drain pipe.

However, after the indoor unit of the air conditioner is used for a long time, some impurities can be deposited in the water receiving tray, and even some moss can grow in the water receiving tray, and for the indoor unit of the air conditioner using the drainage pump, the impurities and/or the moss can affect the normal drainage of the drainage pump and even block the drainage pump after entering the drainage pump, so that the indoor unit of the air conditioner is prone to malfunction and halt, and needs to be maintained.

Disclosure of Invention

In view of the above, embodiments of the present application are directed to an air conditioning indoor unit, an air conditioner, and a control method of an air conditioning indoor unit, which can prevent a drain pump from being clogged.

In order to achieve the above object, an embodiment of the present application provides an indoor unit of an air conditioner, including:

the water receiving tray is used for containing condensed water;

a drain pump for draining condensed water from the water collector, the drain pump including a pump housing having a water inlet and a water outlet defining a water flow path therebetween, an impeller rotatably disposed within the pump housing, and a cutter disposed on the impeller and positioned in the water flow path;

one end of the drain pipe is communicated with the water outlet, and the other end of the drain pipe is communicated with the outside;

the water level detection device is used for detecting the water level in the water receiving tray;

and the control device is respectively in signal connection with the water level detection device and the drainage pump.

In one embodiment, the impeller comprises a rotating shaft and blades connected with the rotating shaft, and the cutting piece is connected with the rotating shaft; and/or the cutting member is disposed on the blade.

In one embodiment, the cutting element is embedded in the rotating shaft, and the blade of the cutting element protrudes out of the outer surface of the rotating shaft.

In one embodiment, the blade of the cutting element is any one of a straight blade, a curved blade, a profiled blade and a multi-blade.

Another embodiment of this application provides an air conditioner, includes above-mentioned air conditioning indoor set.

Another embodiment of the present application provides a method for controlling an air conditioner indoor unit, where the method includes:

and under the refrigeration mode, controlling the drainage pump to rotate forwards, reversely or alternatively according to a preset time length so as to perform anti-blocking cleaning on the drainage pump.

In one embodiment, the method further comprises:

determining the starting of the indoor unit of the air conditioner;

determining that the indoor unit of the air conditioner enters the refrigeration mode;

and controlling the drainage pump to operate positively and negatively or alternatively according to a preset duration.

In one embodiment, after controlling the drain pump to operate in forward rotation, reverse rotation, or alternate forward and reverse rotation, the method further comprises:

detecting the water level in the water receiving tray;

and if the water level in the water receiving tray reaches the first water level according to the water level detection result, controlling the drainage pump to operate so as to discharge the condensed water in the water receiving tray.

In one embodiment, in controlling operation of the drain pump, the method further comprises:

determining that the water level in the water pan is reduced to a second water level according to the water level detection result;

and controlling the drainage pump to stop running, wherein the second water level is lower than the first water level.

In one embodiment, the method further comprises: and if the water level in the water receiving tray does not reach the first water level and does not drop to the second water level according to the water level detection result, controlling the drainage pump to operate until the water level in the water receiving tray drops to the second water level, wherein the second water level is lower than the first water level.

In one embodiment, after controlling the drain pump to stop operating, the method further includes:

and controlling the drainage pump to run in the direction opposite to the direction before stopping running so as to perform anti-blocking cleaning on the drainage pump.

In one embodiment, the method further comprises:

detecting the water level in the water receiving tray;

and if the water level in the water receiving tray reaches a first water level according to the water level detection result, controlling the drainage pump to operate until the water level in the water receiving tray is reduced to a second water level, wherein the second water level is lower than the first water level.

In one embodiment, the method further comprises:

receiving a control instruction for closing the refrigeration mode;

controlling the positive rotation operation, the reverse rotation operation or the positive and negative alternate operation of the drainage pump;

and controlling the drainage pump to stop running and closing the refrigeration mode.

The embodiment of the application provides an air conditioner indoor unit, an air conditioner and a control method of the air conditioner indoor unit, a cutting part is arranged in a water discharge pump of the air conditioner indoor unit, the cutting part is arranged on an impeller and located on a water flow circulation path formed between a water inlet and a water outlet of the water discharge pump, when the impeller rotates, the cutting part can be driven to rotate together, therefore, the cutting part can be enabled to cut off and break plants such as impurities and/or moss flowing into a pump shell along with water flow, when the plants such as the impurities and/or the moss in the pump shell are cut off by the cutting part and broken, the plants can be discharged from the water outlet of the water discharge pump along with the water flow, and therefore the water discharge pump can be prevented from being blocked, and user experience can be improved.

Drawings

Fig. 1 is a schematic diagram illustrating a matching relationship between a water pan, a drainage pump, a drainage pipe and a water level detection device of an indoor unit of an air conditioner according to an embodiment of the present application, where a line indicated at L in the diagram indicates a water level line;

FIG. 2 is a schematic view of the construction of the drain pump shown in FIG. 1;

FIG. 3 is an exploded view of the drain pump of FIG. 2;

FIG. 4 is a schematic view of the impeller of FIG. 3 in connection with a cutting element;

FIG. 5 is an exploded view of the impeller and cutting member shown in FIG. 4;

FIG. 6 is a cross-sectional view of the impeller shown in FIG. 3 in connection with a cutting element;

FIG. 7 is a block diagram of the control between the control device and the drain pump according to an embodiment of the present disclosure;

FIG. 8 is a schematic diagram of a control method according to an embodiment of the present application;

fig. 9 is a flowchart of a control method according to an embodiment of the present application.

Description of the reference numerals

A water pan 10; a drain pump 20; a motor 21; a housing 211; a stator 212; a bearing 213; a bearing seat 214; a motor end cap 215; a rotor 216; a motor shaft 217; a power line 22; a pump cover 23; a pump body 24; a pump housing 25; a water inlet 25 a; a water outlet 25 b; an impeller 26; a rotating shaft 261; a mounting groove 261 a; the blades 262; a cutter 27; a blade 27 a; a mounting bracket 28; a drain pipe 30; a water level detection device 40; a control device 50; a CPU 51; a storage unit 52; a power supply unit 53; a display unit 54; a control unit 55.

Detailed Description

It should be noted that, in the present application, technical features in examples and embodiments may be combined with each other without conflict, and the detailed description in the specific embodiment should be understood as an explanation of the gist of the present application and should not be construed as an improper limitation to the present application.

An embodiment of the present application provides an air-conditioning indoor unit, please refer to fig. 1 to 6, which includes a water pan 10, a drainage pump 20, a drainage pipe 30, a water level detection device 40, and a control device 50; the drain pump 20 comprises a pump shell 25, an impeller 26 and a cutting piece 27, wherein the pump shell 25 is provided with a water inlet 25a and a water outlet 25b, a water flow path is formed between the water inlet 25a and the water outlet 25b, the impeller 26 is rotatably arranged in the pump shell 25, and the cutting piece 27 is arranged on the impeller 26 and is positioned on the water flow path; one end of the water discharge pipe 30 is communicated with the water outlet 25b, and the other end of the water discharge pipe 30 is communicated with the outside; the water level detection device 40 is used for detecting the water level in the water pan 10; the control device 50 is in signal connection with the water level detecting device 40 and the drain pump 20, respectively.

Another embodiment of this application provides an air conditioner, includes the air conditioning indoor set of this application arbitrary embodiment.

Specifically, the water pan 10 is mainly used for receiving condensed water condensed on an evaporator of an indoor unit of an air conditioner.

The drain pump 20 is mainly used to suck the condensed water in the water receiving tray 10 into the drain pump 20 through a water inlet 25a of the pump case 25, and to discharge the condensed water into the drain pipe 30 through a water outlet 25b of the pump case 25.

The cutting element 27 is a member capable of cutting and breaking the impurities and/or moss flowing into the pump housing 25 along with the water flow, and referring to fig. 4 to 6, the cutting element 27 has a relatively sharp blade 27a, the blade 27a may be a straight blade, a curved blade, a special-shaped blade, or multiple blades, and the cutting element 27 may be a stainless steel blade or a ceramic blade.

The water level detecting device 40 is mainly used for detecting the water level in the water receiving tray 10, so that the control device 50 can control the drainage pump 20 accordingly according to the water level detection result of the water level detecting device 40, for example, when the water level detecting device 40 detects that the water level in the water receiving tray 10 rises to a first water level, the control device 50 can control the drainage pump 20 to operate to drain the condensed water in the water receiving tray 10, and when the water level detecting device 40 detects that the water level in the water receiving tray 10 falls to a second water level lower than the first water level, the control device 50 can control the drainage pump 20 to stop operating.

It should be understood that the control device 50 is not limited to correspondingly controlling the drainage pump 20 according to the water level detection result of the water level detection device 40, and the control device 50 can correspondingly control the drainage pump 20 according to other instructions or detection results, if necessary.

In the embodiment of the present application, the cutting element 27 is disposed on the impeller 26 and located on the water flow path formed between the water inlet 25a and the water outlet 25b of the drain pump 20, and when the impeller 26 rotates, the cutting element 27 can be driven to rotate together, so that the cutting element 27 can cut off and break the plants such as impurities and/or moss flowing into the pump case 25 along with the water flow, and after the plants such as impurities and/or moss in the pump case 25 are cut off and broken by the cutting element 27, the plants can be discharged from the water outlet 25b of the drain pump 20 along with the water flow, thereby preventing the drain pump 20 from being blocked, and further improving the user experience.

The drainage pump 20 according to an embodiment of the present application may have a plurality of structural forms, for example, please refer to fig. 2 and 3, the drainage pump 20 includes a motor 21, a power cord 22, a pump cover 23, a pump body 24, a pump housing 25, an impeller 26, and a cutting element 27, the pump cover 23 is provided with a wire passing hole, one end of the motor 21 is connected to the pump body 24, a motor shaft 217 of the motor 21 extends into the pump body 24, the other end of the motor 21 is connected to the pump cover 23, the pump housing 25 is connected to one end of the pump body 24 away from the motor 21, the impeller 26 is disposed in the pump housing 25, a rotating shaft 261 of the impeller 26 extends into the pump body 24 and is drivingly connected to the motor shaft 217 of the motor 21, the cutting element 27 is disposed on the impeller 26, one end of the power cord 22 is connected to the motor 21, and the other end of the power cord 22 passes through the wire passing hole on the pump cover 23 and is connected to the power supply. The power cord 22 can provide energy for the motor 21 and transmit a control signal and a rotational speed signal of the motor 21 to the control device 50, the motor 21 is mainly used for converting electrical energy into mechanical energy to provide kinetic energy for the impeller 26, the motor 21 is mainly composed of a housing 211, a stator 212, a bearing 213, a bearing seat 214, a motor end cover 215, a rotor 216 and a motor shaft 217 which are arranged in the housing 211, wherein the stator 212 is composed of silicon steel sheets and enameled wires, the stator 212 can convert the electrical energy into rotational magnetic energy after being electrified to attract the rotor 216 to rotate, the bearing 213 and the bearing seat 214 are used for supporting and limiting the rotor 216 to ensure that an air gap between the stator 212 and the rotor 216 is uniform and constant, no friction and stable operation, the motor end cover 215 is used for positioning and supporting the bearing seat 214, and simultaneously, the stator 212 and the rotor 216 can be protected and sealed to prevent external impurities from entering the inside of the motor 21, the rotor 216 is a rotating part of the motor 21, the rotor 216 can rotate under the action of rotating magnetic energy after the stator 212 is electrified, the motor shaft 217 is used for supporting and fixing the rotor 216 and transmitting mechanical energy to the impeller 26 by being in driving connection with the impeller 26, and the impeller 26 can transmit kinetic energy to water flow in the pump shell 25 by rotating, so that the water flow flows along the inner wall of the pump shell 25 under the action of centrifugal force and flows out from the water outlet 25 b.

Further, referring to fig. 2 and 3, a mounting bracket 28 may be further disposed on the housing 211 of the motor 21, and the mounting bracket 28 may be used to fix the drain pump 20 above the water pan 10, so that the drain pump 20 can be reliably fixed and stably operated.

Referring to fig. 7, the control device 50 is exemplarily composed of a CPU51 (central processing unit), a storage unit 52, a power supply unit 53, a display unit 54 and a control unit 55, wherein the storage unit 52 is used for storing necessary information, the power supply unit 53 is used for supplying power to the CPU51, the storage unit 52, the display unit 54, the control unit 55 and the drainage pump 20, the display unit 54 is used for displaying operation information and failure information of the air conditioner indoor unit (including failure information of the drainage pump 20), the control unit 55 is used for controlling operations of components of the air conditioner indoor unit including the drainage pump 20 and detecting an operation speed of the drainage pump 20, and the CPU51 is used for controlling operations of the whole air conditioner indoor unit including the drainage pump 20, for example, the CPU51 may exchange information with the storage unit 52, control the display of the display unit 54, and exchange information with the control unit 55, And sending a control command to the control unit 55, and collecting control information and part operation conditions fed back by the control unit 55.

In one embodiment, referring to fig. 4 to 6, the impeller 26 includes a rotating shaft 261 and a blade 262 connected to the rotating shaft 261, and the cutting member 27 is connected to the rotating shaft 261.

Specifically, the number of the cutting elements 27 may be one or more, and for example, one cutting element 27 having four blades 27a is disposed on the impeller 26 in fig. 4 to 6.

When the impeller 26 rotates, the cutter 27 can rotate at a high speed along with the rotation shaft 261, whereby the foreign matter and/or plants such as moss flowing into the pump case 25 can be cut and broken sufficiently.

There are various ways of connecting the cutting member 27 to the rotating shaft 261, for example, the cutting member 27 may be connected to the rotating shaft 261 by injection molding, and the cutting member 27 may be detachably or non-detachably fixed to the rotating shaft 261 by a fastening device.

For example, referring to fig. 4 to 6, the cutting element 27 may be embedded in the rotating shaft 261, and the blade 27a of the cutting element 27 protrudes from the outer surface of the rotating shaft 261, that is, the rotating shaft 261 is provided with an installation groove 261a, the cutting element 27 is embedded in the installation groove 261a, and the blade 27a of the cutting element 27 protrudes from the installation groove 261a to protrude from the outer surface of the rotating shaft 261, so that the cutting element 27 is conveniently installed, and the cutting element 27 can have better cutting and breaking effects.

In some embodiments, the cutting element 27 may also be sleeved on the outer surface of the shaft 261.

In some embodiments, the cutting member 27 may be disposed on the blade 262, or the rotating shaft 261 and the blade 262 may be disposed with the cutting member 27.

An embodiment of the present application further provides a control method for an air conditioning indoor unit, which is used for the air conditioning indoor unit according to any embodiment of the present application, and please refer to fig. 8, where the control method mainly includes the following steps:

step S601: in the refrigeration mode, the drainage pump 20 is controlled to operate positively and negatively or alternatively according to a preset duration to perform anti-blocking cleaning on the drainage pump 20.

Specifically, according to needs, the drainage pump 20 may be controlled to operate in forward rotation only according to preset duration, the drainage pump 20 may be controlled to operate in reverse rotation only according to preset duration, and the drainage pump 20 may be controlled to operate in forward and reverse rotation alternately according to preset duration, where the forward and reverse rotation alternately means that the forward and reverse rotation operations of the drainage pump 20 are alternately performed, the drainage pump 20 may operate in forward rotation first, then operate in reverse rotation, or operate in reverse rotation first, then operate in forward rotation, and the number of times of the forward and reverse rotation operations may be determined as needed.

For example, the water discharge pump 20 may be controlled to operate in the forward rotation manner for T1 minutes, or the water discharge pump 20 may be controlled to operate in the reverse rotation manner for T2 minutes, or the water discharge pump 20 may be controlled to operate in the forward rotation manner for T1 minutes first, and then the water discharge pump 20 may be controlled to operate in the reverse rotation manner for T2 minutes, or the water discharge pump 20 may be controlled to operate in the reverse rotation manner for T2 minutes first, and then the water discharge pump 20 may be controlled to operate in the forward rotation manner for T1 minutes, where T1 and T2 are both greater than 0, and the value ranges of T1 and T2 may be adjusted as needed, for example, T1 may be 1 to 3, and T2 may be 1 to 3.

The anti-blocking cleaning means that the cutting piece 27 can cut off and break the impurities and/or moss and other plants flowing into the pump shell 25 along with the water flow by controlling the drainage pump 20 to rotate positively for T1 minutes and/or reversely for T2 minutes so as to prevent the impurities and/or moss and other plants in the pump shell 25 from blocking the drainage pump 20.

In one embodiment, the method further comprises: determining the starting of an indoor unit of an air conditioner; determining that an indoor unit of an air conditioner enters a refrigeration mode; and controlling the drainage pump 20 to operate positively and negatively or alternatively according to a preset time length.

That is to say, after the air-conditioning indoor unit is started, if it is determined that the air-conditioning indoor unit enters the cooling mode, the drainage pump 20 is controlled to rotate forward, rotate backward or alternatively rotate forward and backward for a preset time period, so as to cut off, smash and the like the impurities and/or plants such as moss remaining in the pump casing 25.

In some embodiments, the air conditioner indoor unit may operate in the cooling mode for a certain time and then control the drainage pump 20 to operate in the forward rotation mode, the reverse rotation mode or the forward and reverse rotation mode alternately, or the air conditioner indoor unit may control the drainage pump 20 to operate in the forward rotation mode, the reverse rotation mode or the forward and reverse rotation mode alternately every certain time interval in the cooling mode.

In one embodiment, after controlling the drainage pump 20 to operate in forward rotation, reverse rotation or alternate rotation, the method further includes: detecting the water level in the water pan 10; and if the water level in the water receiving tray 10 reaches the first water level according to the water level detection result, controlling the drainage pump 20 to operate so as to drain the condensed water in the water receiving tray 10.

That is, after the plants such as the impurities and/or moss in the pump casing 25 are cleaned, the water level in the drip tray 10 may be detected by the water level detecting device 40, and if it is determined that the water level in the drip tray 10 reaches the first water level according to the water level detection result of the water level detecting device 40, it indicates that much condensed water is contained in the drip tray 10, and at this time, the drain pump 20 may be controlled to operate to discharge the condensed water in the drip tray 10.

It should be noted that, during the draining process of the draining pump 20, the draining pump 20 may operate in the forward direction or the reverse direction, but in order to ensure the draining effect of the draining pump 20, the draining pump 20 generally operates in the forward direction.

Further, in controlling the operation of the drain pump 20, the method further includes: determining that the water level in the water pan 10 is reduced to a second water level according to the water level detection result; the drain pump 20 is controlled to stop operating, wherein the second water level is lower than the first water level.

That is, during the draining process of the drain pump 20, if it is determined that the water level in the drip tray 10 has dropped to the second water level according to the water level detection result of the water level detection device 40, it indicates that most of the condensed water in the drip tray 10 has been drained and no drainage is required, and at this time, the water pump may be controlled to stop operating.

In some embodiments, the water pump may be controlled to stop operating after the drain pump 20 operates for T3 minutes, where T3 is greater than 0.

The specific value of T3 can be calculated according to the size of the water storage space of the water receiving tray 10 and the drainage capacity of the drainage pump 20.

In one embodiment, after controlling the drainage pump 20 to operate in forward rotation, reverse rotation or alternate rotation, the method may further include: and if the water level in the water receiving tray 10 does not reach the first water level and does not drop to the second water level according to the water level detection result, controlling the drainage pump 20 to operate until the water level in the water receiving tray 10 drops to the second water level.

That is, if it is determined that the water level in the drip tray 10 is higher than the second water level and lower than the first water level according to the water level detection result of the water level detecting device 40, the operation of the drain pump 20 may be continuously controlled to drain the condensed water in the drip tray 10, and when the water level in the drip tray 10 is lowered to the second water level, the operation of the drain pump 20 is controlled to stop.

In some embodiments, it may be determined that the water level in the drip tray 10 does not reach the first water level, and the drain pump 20 is controlled to stop operating.

In one embodiment, after controlling the drain pump 20 to stop operating, the method further includes: the drain pump 20 is controlled to operate in the opposite direction to that before the stop operation to perform the anti-clogging cleaning of the drain pump 20.

That is, if the drainage pump 20 is operated in a forward rotation manner during the drainage process, the drainage pump 20 is controlled to stop operating, then the drainage pump 20 is controlled to operate in a reverse rotation manner, if the drainage pump 20 is operated in a reverse rotation manner during the drainage process, then the drainage pump 20 is controlled to stop operating, then the drainage pump 20 is controlled to operate in a forward rotation manner, so that the cutting piece 27 can cut off, smash and the like the impurities and/or the moss and other plants remained in the pump shell 25 to clean the plants in an anti-blocking manner.

For example, the drain pump 20 may be controlled to operate in the opposite direction to that before the operation is stopped for T4 minutes, where T4 is greater than 0, and the value range of T4 may be adjusted as needed, and for example, T4 may be 1 to 3.

In one embodiment, the method further comprises: detecting the water level in the water pan 10; and if the water level in the water receiving tray 10 reaches the first water level according to the water level detection result, controlling the drainage pump 20 to operate until the water level in the water receiving tray 10 is reduced to the second water level.

That is, in the air conditioning indoor unit in the cooling mode, no matter whether the drain pump 20 performs the anti-blocking cleaning on the drain pump 20 through the forward rotation operation, the reverse rotation operation or the forward and reverse alternate operation, as long as the water level in the water receiving tray 10 reaches the first water level, the drain pump 20 is controlled to operate to discharge the condensed water in the water receiving tray 10, and when the water level in the water receiving tray 10 falls to the second water level, the drain pump 20 is controlled to stop operating.

In one embodiment, the method further comprises: receiving a control instruction for closing the refrigeration mode; controlling the drainage pump 20 to operate for T1 minutes in a forward rotation mode and/or to operate for T2 minutes in a reverse rotation mode; the drain pump 20 is controlled to stop operating and the cooling mode is turned off.

The control instruction for closing the cooling mode can be a control instruction for shutting down the air conditioner or a control instruction for switching the air conditioner indoor unit from the cooling mode to other non-cooling modes.

That is, before the indoor unit of the air conditioner turns off the cooling mode, the drainage pump 20 may be controlled to operate in a forward rotation mode for T1 minutes and/or in a reverse rotation mode for T2 minutes again to perform anti-blocking cleaning such as cutting off and breaking the impurities and/or moss remaining in the pump casing 25, and then the drainage pump 20 is controlled to stop operating and turn off the cooling mode.

In a specific embodiment, referring to fig. 9, the control method includes the following steps:

step S701: starting up;

step S702: judging whether the indoor unit of the air conditioner enters a refrigeration mode, if so, executing a step S703, and if not, executing a step S702;

step S703: controlling the drainage pump 20 to operate for T1 minutes in a forward rotation mode and T2 minutes in a reverse rotation mode;

the drainage pump 20 is controlled to operate for T1 minutes in the forward rotation mode and T2 minutes in the reverse rotation mode, so that the aim of carrying out anti-blocking cleaning on residual impurities and/or plants such as moss in the pump shell 25, such as cutting, smashing and the like is achieved.

Step S704: detecting the water level in the water pan 10;

step S705: judging whether the water level in the water receiving tray 10 reaches a first water level, if so, executing a step S706, otherwise, executing a step S708;

step S706: controlling the positive rotation operation of the drainage pump 20;

this step is mainly used to drain the condensed water in the drip tray 10, and is performed only when the water level in the drip tray 10 reaches the first water level.

Step S707: judging whether the water level in the water receiving tray 10 is reduced to a second water level, if so, executing step S708, otherwise, continuing to execute step S706;

that is, the drain pump 20 keeps rotating forward until the water level in the drain pan 10 drops to the second water level.

Step S708: controlling the drain pump 20 to stop running;

step S709: judging whether a control instruction for closing the refrigeration mode is received, if so, executing a step S710, otherwise, executing a step S704;

if not, the step S704 is executed before the cooling mode is turned off, and whether or not the step S703 is executed, the water level detection device 40 detects the water level in the water tray 10, and if the water level in the water tray 10 reaches the first water level, the drain pump 20 is turned on, and the drain pump 20 is controlled to operate in the forward rotation direction, and if the water level in the water tray 10 does not reach the first water level, the drain pump 20 is not turned on.

Step S710: controlling the drainage pump 20 to operate for T1 minutes in a forward rotation mode and T2 minutes in a reverse rotation mode;

which is equivalent to performing the anti-blocking cleaning on the drain pump 20 again.

Step S711: the cooling mode is turned off.

The various embodiments/implementations provided herein may be combined with each other without contradiction.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application are included in the protection scope of the present application.