CN116558077A - Self-cleaning control method for air conditioner, air conditioner and computer readable storage medium - Google Patents

Abstract

The application relates to the technical field of air conditioners, and provides a self-cleaning control method of an air conditioner, the air conditioner and a computer readable storage medium, wherein the method comprises the following steps: when a self-cleaning instruction is received, determining a target heat exchanger according to the self-cleaning instruction; the target heat exchanger is an evaporator or a condenser; controlling the air conditioner to operate in a first working mode; the first working mode corresponding to the evaporator is a refrigeration mode, and the first working mode corresponding to the condenser is a heating mode; controlling the water pump to pump condensed water in the water storage tank to flow to the target heat exchanger; periodically reducing the opening of an expansion valve of the air conditioner until a preset frosting condition is met; after the preset frosting condition is met, controlling the air conditioner to operate in a second working mode; the second working mode corresponding to the evaporator is a heating mode, and the second working mode corresponding to the condenser is a refrigerating mode; and when the preset end condition is met, completing the response to the self-cleaning instruction. The method can improve the self-cleaning efficiency of the air conditioner.

Description

Self-cleaning control method for air conditioner, air conditioner and computer readable storage medium

Technical Field

The present disclosure relates to the field of air conditioning technologies, and in particular, to a self-cleaning control method for an air conditioner, and a computer readable storage medium.

Background

In the working process of the air conditioner, part of moisture in the air can be remained in the air conditioner to form condensed water. For example, when the air conditioner is operated in a cooling mode, moisture in the air may be condensed on the surface of the evaporator to generate condensed water.

In the related art, some schemes can adopt condensed water to automatically clean an air conditioner, for example, firstly, the condensed water is controlled to be condensed into frost on the surface of an evaporator in a refrigeration mode, and then the air conditioner is controlled to be opened in a heating mode, so that the frost layer on the surface of the evaporator is melted, and the aim of cleaning the evaporator can be achieved. However, in the self-cleaning process, both frosting and defrosting need to wait for a long time, and the self-cleaning efficiency is low.

Disclosure of Invention

The embodiment of the application discloses a self-cleaning control method of an air conditioner, the air conditioner and a computer readable storage medium, which can solve the technical problem of low cleaning efficiency of a heat exchanger to a certain extent.

The application provides a self-cleaning control method of an air conditioner, which is characterized in that when a self-cleaning instruction is received, a target heat exchanger is determined according to the self-cleaning instruction; the target heat exchanger is an evaporator or a condenser; controlling the air conditioner to operate in a first working mode; the first working mode corresponding to the evaporator is a refrigeration mode, and the first working mode corresponding to the condenser is a heating mode; controlling the water pump to pump condensed water in the water storage tank to flow to the target heat exchanger; periodically reducing the opening of an expansion valve of the air conditioner until a preset frosting condition is met, and controlling the air conditioner to operate in a second working mode after the preset frosting condition is met; the second working mode corresponding to the evaporator is a heating mode, and the second working mode corresponding to the condenser is a refrigerating mode; and when the preset end condition is met, completing the response to the self-cleaning instruction.

In the self-cleaning control method of the air conditioner, firstly, a target heat exchanger selected by a user is determined in response to a self-cleaning instruction, and the target heat exchanger can comprise an evaporator and a condenser.

If the target heat exchanger is an evaporator, controlling a first working mode of the air conditioner to be a refrigeration mode, and providing a basis for triggering the evaporator to frost; if the target heat exchanger is a condenser, the first working mode of the air conditioner is controlled to be a heating mode, and a basis is provided for triggering frosting of the condenser.

Meanwhile, the condensed water in the water pump water storage tank is controlled to flow to the target heat exchanger, so that the utilization rate of the condensed water can be improved, and conditions are provided for frosting.

On the basis, by periodically reducing the opening of the expansion valve of the air conditioner, the frosting speed of the condenser or the evaporator can be accelerated, and the loss of the air conditioner is reduced to a certain extent.

Secondly, after the preset frosting condition is satisfied, in order to be able to remove the attached dirt, the air conditioner may be controlled to operate in the second operation mode. If the target heat exchanger is an evaporator, controlling a first working mode of the air conditioner to be a heating mode, and heating the evaporator in the heating mode to melt frost in a heating mode; if the target heat exchanger is a condenser, controlling the first working mode of the air conditioner to be a refrigeration mode, and increasing the temperature of the condenser in the refrigeration mode to melt the frost in a temperature increasing mode.

And finally, when the preset end condition is met, determining that the response to the self-cleaning instruction is finished.

In summary, the method provided by the application can accelerate the frosting speed of the target heat exchanger by reducing the opening degree of the expansion valve in the self-cleaning process of the air conditioner, thereby reducing the frosting time and improving the self-cleaning efficiency of the air conditioner.

The application also provides a self-cleaning control device of the air conditioner, which is used for determining a target heat exchanger according to the self-cleaning instruction when the self-cleaning instruction is received by the instruction receiving module; the target heat exchanger is an evaporator or a condenser; the control module is used for controlling the air conditioner to operate in a first working mode; the first working mode corresponding to the evaporator is a refrigeration mode, and the first working mode corresponding to the condenser is a heating mode; the control module is also used for controlling the condensed water in the water pump water storage tank to flow to the target heat exchanger; the frosting module is used for periodically reducing the opening of the expansion valve of the air conditioner until the preset frosting condition is met; the defrosting module is used for controlling the air conditioner to operate in a second working mode after the preset frosting condition is met; the second working mode corresponding to the evaporator is a heating mode, and the second working mode corresponding to the condenser is a refrigerating mode; and the completion module is used for completing the response to the self-cleaning instruction when the preset end condition is met.

The application also provides an air conditioner, which comprises a heat exchanger, an expansion valve, a water storage tank, a water pump, a processor and a memory, wherein the processor is used for executing a computer program stored in the memory so as to realize the self-cleaning control method of the air conditioner.

The application also provides a computer readable storage medium storing at least one instruction which when executed by a processor implements the self-cleaning control method of the air conditioner.

Drawings

Fig. 1 is a schematic structural diagram of an air conditioner according to an embodiment of the present application.

Fig. 2 is a flowchart of a self-cleaning control method of an air conditioner according to an embodiment of the present application.

Fig. 3 is a schematic structural diagram of an air conditioner according to an embodiment of the present application.

Fig. 4 is a flowchart of a self-cleaning control method of an air conditioner according to another embodiment of the present application.

Fig. 5 is a flowchart of a self-cleaning control method of an air conditioner according to another embodiment of the present application.

Fig. 6 is a schematic structural diagram of a self-cleaning control device for an air conditioner according to an embodiment of the present application.

Detailed Description

For ease of understanding, a description of some of the concepts related to the embodiments of the present application are given by way of example for reference.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the accompanying drawings are used for distinguishing between similar objects and not for describing a particular sequential or chronological order.

It should be further noted that the method disclosed in the embodiments of the present application or the method shown in the flowchart, including one or more steps for implementing the method, may be performed in an order that the steps may be interchanged with one another, and some steps may be deleted without departing from the scope of the claims.

Some embodiments will be described below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.

In the working process of the air conditioner, part of moisture in the air can be remained in the air conditioner to form condensed water. For example, when the air conditioner is in a cooling mode, the temperature of the surface of the evaporator is low, and moisture in the air can be condensed on the surface of the evaporator to generate condensed water.

In the related art, some schemes automatically clean an air conditioner using condensed water. For example, the air conditioner is controlled to start a refrigeration mode, condensed water is condensed into frost on the surface of the evaporator, and then the air conditioner is controlled to start a heating mode, so that the frost layer on the surface of the evaporator is melted, and the aim of cleaning the evaporator can be achieved.

However, in the self-cleaning process, both frosting and defrosting need to wait for a long time, and the self-cleaning efficiency is low.

In order to improve the cleaning efficiency of an air conditioner, the embodiment of the application provides a self-cleaning control method of the air conditioner, which can be applied to the air conditioner. The structure of the air conditioner will be first described by way of example.

Fig. 1 is a schematic structural diagram of an air conditioner according to an embodiment of the present application. As shown in fig. 1, in the embodiment of the present application, the air conditioner 100 includes a heat exchanger 110, an expansion valve 111, a water storage tank 112, a water pump 113, a processor 114, and a memory 115. The heat exchanger 110 may include an evaporator 101 and a condenser 102, among others. An expansion valve 111 is connected to the evaporator 101 and the condenser 102, respectively, for controlling the flow of refrigerant between the evaporator 101 and the condenser 102. The water storage tank 112 is used to store water, such as condensed water, generated by the air conditioner 100. The water pump 113 is used to pump water in the water reservoir 112 to clean the heat exchanger 110.

The thick solid line in fig. 1 indicates the flow path of the refrigerant; the dashed line indicates the flow path of the water in reservoir 112; the solid lines, which are not bolded, represent communication links for data interaction.

The air conditioner 100 may be a mobile air conditioner, a wall-mounted air conditioner, a window air conditioner, a split air conditioner, or the like.

Fig. 1 is merely an exemplary illustration of an air conditioner 100 and is not intended to be limiting, and in other embodiments, the air conditioner 100 may include more or fewer components than shown, or may combine certain components, or may replace different components, e.g., the air conditioner 100 may further include one or more of a compressor, a fan, a three-way valve, a four-way valve, a water level sensor, an evaporator tube bulb, a condenser tube bulb, etc.

Fig. 2 is a flowchart of an air conditioner self-cleaning control method according to an embodiment of the present application, as shown in fig. 2, where the air conditioner self-cleaning control method according to the embodiment of the present application is applied to an air conditioner (such as air conditioner 100 in fig. 1). The order of the steps in the flowchart may be changed and some steps may be omitted according to various needs. As shown in fig. 2, the steps S201 to S206 are included as follows.

Step S201, when a self-cleaning instruction is received, determining a target heat exchanger according to the self-cleaning instruction.

In some embodiments of the present application, the air conditioner may receive different instructions triggered by a user, for example, the instructions may include one or more of a power-on instruction, a power-off instruction, a temperature setting instruction, a wind speed setting instruction, an operation mode selection instruction, a timing power-on instruction, and the like. The operation mode selection instruction may include a self-cleaning instruction corresponding to a self-cleaning mode, a heating instruction corresponding to a heating mode, a refrigerating instruction corresponding to a refrigerating mode, a dehumidifying instruction corresponding to a dehumidifying mode, an air supply instruction corresponding to an air supply mode, and the like, which is not limited in this application.

In response to the acquired instruction, the air conditioner may perform an operation indicated by the instruction or enter an operation mode indicated by the instruction. For example, in some examples, a self-cleaning mode is entered when a self-cleaning instruction is received by the air conditioner; when the air conditioner receives the temperature setting instruction, the temperature of the air conditioner is adjusted to the target temperature indicated by the temperature setting instruction, and the practical application is not limited to this.

In some embodiments of the present application, a user may operate an electronic device communicatively coupled to an air conditioner. The electronic device may send a corresponding instruction to the air conditioner in response to an operation of the user. The air conditioner can execute the operation indicated by the instruction when receiving the instruction sent by the electronic equipment. The electronic device may be a cell phone, a tablet, a remote control, etc.

Taking the electronic device as an example of a mobile phone, the mobile phone may display a User Interface (UI) for interacting with a User. The UI interface may be an interface provided by an Application (APP), for example, an interface provided by an air conditioning control program, to which practical Application is not limited. A number of controls may be provided on the UI interface, each of which may represent a different instruction. For example, in some examples, when a user clicks a control on the handset that represents a self-cleaning instruction, the handset may send the self-cleaning instruction to the air conditioner in response to the user's operation; and when the air conditioner receives the self-cleaning instruction, starting a self-cleaning mode.

In other embodiments, a touch screen or an entity button is provided on the air conditioner, and the user can trigger the corresponding instruction by clicking a control corresponding to different instructions on the touch screen. For example, in some examples, when a user clicks a control corresponding to a self-cleaning instruction on a touch screen of an air conditioner, the air conditioner may enter a self-cleaning mode in response to an operation of the user; in other examples, the user may also let the air conditioner enter the self-cleaning mode by clicking a physical button corresponding to the self-cleaning instruction, which is not limited in this application.

In some embodiments of the present application, when the air conditioner is used for a long time or not used for a long time, a heat exchanger in the air conditioner may be blocked, and the heat exchanger may be an evaporator or a condenser in the air conditioner. In order to avoid deterioration of performance of the air conditioner due to clogging of the evaporator or condenser, the evaporator and/or condenser may be cleaned periodically.

When the self-moving equipment acquires the self-cleaning instruction, a target heat exchanger to be cleaned can be determined according to the self-cleaning instruction, and the target heat exchanger can be an evaporator, a condenser, an evaporator and a condenser.

For example, in some examples, the air conditioner receives a self-cleaning instruction for cleaning the evaporator, and the evaporator can be used as a target heat exchanger to control the air conditioner to clean the evaporator; for another example, the air conditioner receives a self-cleaning instruction for cleaning the condenser, and can take the condenser as a target heat exchanger to control the air conditioner to clean the condenser; for another example, the air conditioner receives a self-cleaning instruction for cleaning two devices, and the two devices can be used as target heat exchangers to control the air conditioner to clean the two devices in sequence, wherein the two devices refer to an evaporator and a condenser. In an actual scenario, the cleaning sequence of the two devices may be preset, and when a cleaning instruction for cleaning the two devices is received, the two devices may be cleaned according to the cleaning sequence.

In some embodiments, the air conditioner may further determine the target heat exchanger or other components of the air conditioner that need to be cleaned, such as a filter screen, according to the received cleaning command, which is not limited in this application.

Step S202, controlling the air conditioner to operate in a first operation mode.

In some embodiments of the present application, the operation mode of the air conditioner may include one or more of a cooling mode, a heating mode, a blowing mode, a dehumidifying mode, and the like.

After the target heat exchanger is determined, the air conditioner may be controlled to operate in a first mode of operation. For example, in some examples, if the target heat exchanger is an evaporator, the first operation mode corresponding to the evaporator is a cooling mode, and the air conditioner may be controlled to operate in the cooling mode; if the target heat exchanger is a condenser, the first working mode corresponding to the condenser is a heating mode, and the air conditioner can be controlled to operate in the heating mode; if the target heat exchanger is two, the first working mode of the air conditioner running at the moment can be set according to the sequence of cleaning the two heat exchangers.

For example, in some examples, a mobile air conditioner is taken as an example, and among the air outlets of the mobile air conditioner, the air outlet corresponding to the evaporator is usually closer to the user, so for cleaning two evaporators of the mobile air conditioner, the priority of cleaning the evaporator may be higher than the priority of cleaning the condenser. When the evaporator is cleaned, the air conditioner can be controlled to operate in a refrigeration mode; when the condenser is cleaned, the air conditioner can be controlled to operate in a heating mode. In other examples, it may also be provided that the cleaning condenser may have a higher priority than the cleaning evaporator. The order of cleaning the two devices can be set according to the actual situation, and the present application is not limited thereto.

Step S203, the condensed water in the water storage tank pumped by the water pump is controlled to flow to the target heat exchanger.

In some embodiments of the present application, a water pump and a water storage tank are further provided in the air conditioner, the water pump is communicated with the water storage tank, the water storage tank is a container for collecting condensed water of the air conditioner, and the water pump is used for pumping out the condensed water of the water storage tank or water in a drainage system so as to prevent the water from accumulating in the air conditioner to cause the air conditioner to malfunction or damage.

After the target heat exchanger to be cleaned is determined, the water storage amount in the water storage tank can be judged through a water level sensor in the water storage tank, and the water storage amount can be expressed by the water level. If the water level height is detected to be not up to the preset height, outputting a water adding prompt message to remind a user of adding water; if the water level reaches the preset height, the water pump can be controlled to pump the condensed water in the water storage tank, so that the condensed water stored in the water storage tank can be prevented from damaging an air conditioner too much, and the pumped condensed water can be controlled to flow to the target heat exchanger so as to clean the target heat exchanger.

Step S204, the opening degree of an expansion valve of the air conditioner is periodically reduced until a preset frosting condition is met.

In some embodiments of the present application, an expansion valve is also provided in the air conditioner for controlling the flow and pressure of the refrigerant. When the air conditioner is normally operated, the opening degree of the expansion valve can be adjusted according to a preset control strategy and related factors (such as ambient temperature, humidity and the like so as to achieve an ideal temperature adjusting effect, wherein the opening degree of the expansion valve can be realized through a stepping motor.

After the condensed water is controlled to flow to the target heat exchanger, the flow rate of the refrigerant may be reduced by the expansion valve. Since the expansion valve is disposed between the condenser and the evaporator, when the expansion valve reduces the flow rate of the refrigerant, the temperature of the heat pipe is increased and the temperature of the cold pipe is decreased. When the air conditioner operates in the first working mode, the target heat exchanger is a cold pipe, so that when the flow rate of the refrigerant is reduced through the expansion valve, the temperature of the target heat exchanger is reduced, and the frosting speed is improved.

In some embodiments of the present application, in order to achieve the purpose of accelerating frosting, the opening of the expansion valve of the air conditioner may be periodically reduced, for example, 10pls is reduced every 30 seconds, where pls is a unit of measuring the opening of the electronic expansion valve, so as to reduce the flow of the refrigerant, so that the target heat exchanger is supercooled, and the preset frosting condition can be rapidly satisfied.

The preset frosting condition may be that the temperature of the target heat exchanger is detected to be less than or equal to a preset frosting temperature.

Step S205, after meeting the preset frosting condition, controlling the air conditioner to operate in a second working mode.

In some embodiments of the present application, in order to achieve the purpose of cleaning the target heat exchanger, after the preset frosting condition is met, the air conditioner may be switched to the operation mode, and the air conditioner is controlled to operate in the second operation mode, so that the air conditioner may enter the defrosting and rinsing stage. For example, if the target heat exchanger is an evaporator, the air conditioner is operated in a first operation mode, such as a cooling mode, before a preset frosting condition is satisfied; after the preset frosting condition is met, the first working mode is switched to the second working mode, for example, the refrigerating mode is switched to the heating mode. For another example, if the target heat exchanger is a condenser, the air conditioner is operated in a first operation mode, such as a heating mode, before a preset frosting condition is satisfied; after the preset frosting condition is satisfied, the first operation mode may be switched to the second operation mode, for example, the heating mode is switched to the cooling mode.

Step S206, when the preset end condition is met, the response to the self-cleaning instruction is completed.

In some embodiments of the present application, after the air conditioner is operated in the second operation mode, the temperature of the target heat exchanger is increased, the frost layer on the surface of the target heat exchanger is melted, the melted condensed water can wash off the dirt attached to the surface of the target heat exchanger, and the dirt is collected and placed in the dust box below the target heat exchanger, so as to achieve the effect of decontamination and sterilization.

In some embodiments of the present application, a preset end condition may be set, where the preset end condition may be that the temperature of the target heat exchanger is detected to be greater than or equal to a preset sterilization temperature, and the duration time is greater than or equal to a preset sterilization time period.

And when the preset end condition is reached, determining that the cleaning and sterilization of the target heat exchanger are finished.

In the embodiment of the application, the target heat exchanger to be cleaned can be determined according to the received self-cleaning instruction, the flow direction of the extracted condensed water is controlled to clean the target heat exchanger, the extracted condensed water can effectively clean the target heat exchanger on one hand, the running performance of the air conditioner can be guaranteed on the other hand, the air conditioner is prevented from being damaged due to excessive water quantity of the water storage tank, after the condensed water is determined to flow to the target heat exchanger, in order to accelerate frosting, the opening degree of the expansion valve can be periodically reduced under the condition that the normal running of the air conditioner is not damaged, the flow rate of the refrigerant can be effectively controlled, and the target heat exchanger is supercooled, so that the purpose of accelerating frosting is achieved. After the aim of frosting is achieved, namely the preset frosting condition is met, a frosting process can be started, the first working mode before frosting is switched to the second working mode, the air conditioner is enabled to operate in the second working mode, defrosting, flushing and sterilization are carried out until the preset ending condition is met, cleaning of the target heat exchanger is confirmed to be completed, and the cleaning efficiency of the air conditioner can be effectively improved.

Fig. 3 is a schematic structural diagram of an air conditioner according to an embodiment of the present application, as shown in fig. 3, in the air conditioner, a condenser, a fan corresponding to the condenser (such as a condensation side fan in fig. 3), an evaporator, a fan corresponding to the evaporator (such as an evaporation side fan in fig. 3), a compressor, a four-way valve, a three-way valve, a water pump, a water storage tank, and an expansion valve are provided, and in order to more clearly describe the method provided in the present application, practical application is not limited thereto.

The thickened lines indicate the flow paths of the refrigerant, and the non-thickened lines indicate the flow paths of the condensed water.

As described with reference to fig. 3, if a self-cleaning instruction selected by a user is received, the air conditioner may pump water from the water storage tank through the water pump, and flow the water to the target heat exchanger through the three-way valve, for example, if the target heat exchanger is a condenser, the three-way valve is controlled to open the end B so that condensed water flows to the condenser; for another example, if the target heat exchanger is an evaporator, the three-way valve is controlled to open the end A, so that condensed water flows to the evaporator. In order to increase the heat exchange efficiency, a condensing side fan and an evaporating side fan are provided in the air conditioner.

In cleaning the target heat exchanger, it is necessary to frost first and then defrost. In the frosting process, frosting can be accelerated by reducing the opening degree of the expansion valve.

When the frosting condition is met, a defrosting mode needs to be entered, and the air conditioner is controlled to be switched from the first working mode to the second working mode. For example, if the target heat exchanger is an evaporator and the second working mode of the air conditioner is a heating mode, the air conditioner can change the flow direction of the refrigerant between the evaporator and the condenser through the four-way valve, and the compressor compresses and pushes the refrigerant to the evaporator, so that the refrigerant flows from the evaporator to the condenser, the temperature of the evaporator is increased, the frost layer of the evaporator is melted, and the condenser is cleaned; similarly, if the target heat exchanger is a condenser and the second operation mode of the air conditioner is a cooling mode, the compressor compresses and pushes the refrigerant to the condenser, so that the refrigerant flows from the condenser to the evaporator, the temperature of the condenser is increased, the frost layer of the condenser is melted, and the condenser is cleaned.

Fig. 4 is a flowchart of a self-cleaning control method of an air conditioner according to another embodiment of the present application. Upon determining that the target heat exchanger is an evaporator, an embodiment as shown in FIG. 4 is provided, comprising the steps of:

in step S401, when a self-cleaning instruction for cleaning the evaporator is received, the target heat exchanger is determined to be the evaporator.

In some embodiments of the present application, the specific description of step S401 may refer to step S201 in the embodiment provided in fig. 2, and the description is not repeated here.

Step S402, controlling the air conditioner to operate in a refrigeration mode, and adjusting the rotating speed of a fan corresponding to the evaporator to be a first rotating speed.

In some embodiments of the present application, as shown in fig. 3, a corresponding fan may be disposed beside the evaporator of the air conditioner, which may be referred to as an evaporation side fan. The evaporating side fan has the function of increasing air flow and improving the heat exchange efficiency of the evaporator and the ambient air.

When the target heat exchanger is determined to be an evaporator, the air conditioner may be controlled to operate in a cooling mode. In the refrigeration mode, the temperature of the evaporator is low, and the water hanging condition occurs on the surface of the evaporator when the temperature of the evaporator is reduced. In order to prevent the water from being blown out of the air conditioner by the air blown out by the evaporation side fan, and also to reduce the heat exchange efficiency between the evaporator and the ambient air, the rotation speed of the evaporation side fan may be reduced, that is, the rotation speed of the fan corresponding to the evaporator may be adjusted to the first rotation speed. Wherein the first rotational speed is less than a preset rotational speed. The preset rotational speed may be a rated rotational speed when the evaporation side fan is operated at a lowest gear wind speed.

Step S403, controlling the water pump to pump the condensed water in the water storage tank to flow to the evaporator.

In some embodiments of the present application, after the target heat exchanger is determined to be an evaporator, in order to clean the evaporator with condensed water, the condensed water in the water pump-up water storage tank may be controlled to flow to the evaporator.

After the water pump is controlled to pump the condensed water in the water storage tank, as shown in fig. 3, the a end of the three-way valve may be opened to allow the condensed water to flow from the a end to the evaporator. The description may be specifically combined with the related description of step S203, and will not be repeated here.

Step S404, periodically reducing the opening degree of the expansion valve of the air conditioner.

In some embodiments of the present application, the opening degree of the expansion valve of the air conditioner is reduced to accelerate the frosting speed, and the description thereof will be referred to in step S204, and will not be repeated.

Step S405, determining whether the temperature of the evaporator is less than or equal to the frosting temperature.

In some embodiments of the present application, the temperature of the evaporator may be determined by detecting the tube temperature of the evaporator through a temperature sensor during frosting of the condensed water.

By comparing the detected temperature of the evaporator with the frosting temperature, it can be determined whether a preset frosting condition is reached. The frosting temperature may be set according to an actual scene, for example, the frosting temperature may be-6 ℃, -5 ℃, -3 ℃, 0 ℃, etc., which is not limited in the present application.

If the temperature of the evaporator is greater than the frosting temperature, which indicates that the preset frosting condition is not satisfied, the step S404 may be executed again, and the opening of the expansion valve of the air conditioner may be periodically reduced to accelerate the frosting speed.

If the temperature of the evaporator is less than or equal to the frosting temperature, which means that the preset frosting condition has been satisfied and frosting is completed, step S406 may be continued.

Step S406, controlling the air conditioner to operate in a heating mode, and adjusting the rotating speed of the fan corresponding to the evaporator to be a second rotating speed.

In some embodiments of the present application, as shown in fig. 3, the fan corresponding to the evaporator may be an evaporation side fan. After the preset frosting condition is reached, the four-way valve can control the air conditioner to switch the operation mode, so that the first working mode is switched to the second working mode, namely the refrigeration mode is switched to the heating mode, and the evaporator is heated to defrost. At this time, in order to increase the defrosting speed, the evaporation side fan may be controlled to adjust the rotation speed at this time to a second rotation speed, wherein the second rotation speed is greater than the first rotation speed, and the rotation speed of the evaporation side fan is increased, thereby increasing the defrosting speed.

Step S407, determining whether the temperature of the evaporator is greater than or equal to a preset defrosting temperature.

In some embodiments of the present application, the temperature of the evaporator is continuously detected after the evaporation side fan is adjusted to the second rotational speed.

If the detected temperature of the evaporator is smaller than the preset defrosting temperature, the defrosting process is not finished, and the temperature of the evaporator can be continuously detected.

If the temperature of the evaporator is detected to be greater than or equal to the preset defrosting temperature, it is determined that the defrosting process of the evaporator is finished, and step S408 is continuously performed.

In step S408, the rotation speed of the fan corresponding to the evaporator is adjusted to the third rotation speed.

In some embodiments of the present application, as shown in fig. 3, the fan corresponding to the evaporator may be an evaporation side fan, and after the defrosting process is determined to be finished, the rotation speed of the evaporation side fan may be reduced, that is, the rotation speed at this time is adjusted to a third rotation speed smaller than the second rotation speed, so as to reduce the heat exchange efficiency of the evaporator and ambient air, increase the temperature of the evaporator, and enter the sterilization mode.

Step S409, judging whether the temperature of the evaporator is greater than or equal to a preset sterilization temperature and whether the duration is greater than or equal to a preset sterilization duration.

In some embodiments of the present application, many bacteria may be present on the target heat exchanger in addition to the fouling. Thus, sterilization can be performed by the temperature of the evaporator after the defrosting process is finished. By comparing the temperature of the evaporator with a preset sterilization temperature, it can be determined whether sterilization is completed. The preset sterilization temperature may be set according to actual requirements, for example, the preset sterilization temperature may be set to 45 ℃, 50 ℃, 55 ℃, 60 ℃, or the like, which is not limited in the present application.

In the sterilization period, in order to ensure the sterilization effect, a preset sterilization period can be set, and the duration time of controlling the temperature of the evaporator to be greater than or equal to the preset sterilization temperature is longer than or equal to the preset sterilization period. The preset sterilization time period can be set according to actual requirements, for example, the preset sterilization time period can be set to 25min, 30min, 45min and the like, which is not limited in the application.

For example, in some examples, if the preset sterilization temperature is 46 ℃, the preset sterilization period is 25 minutes, and the temperature of the evaporator is continuously detected. If the evaporator temperature is still less than 46 ℃, the temperature of the tube temperature can be continuously detected.

If the temperature of the evaporator reaches 46 ℃, the timing is started, if the temperature of the evaporator is still maintained at 46 ℃ within 25min, even within a period of time greater than 25min, or greater than 46 ℃, the sterilization is determined to be completed, and the step S410 can be continuously executed to complete the cleaning of the evaporator.

Step S410, the cleaning of the evaporator is completed.

After the sterilization process is determined to be finished, the cleaning of the evaporator is determined to be finished, and the air conditioner can be controlled to exit the self-cleaning mode. Subsequently, the self-cleaning instruction is re-detected, and then the self-cleaning mode is re-started from step S401.

In the embodiment of the application, the evaporator can be cleaned by utilizing the condensed water, and the cleaning process comprises frosting, defrosting and sterilizing processes, so that the condensed water can be effectively utilized for self-cleaning. When the frosting process is executed, frosting can be accelerated by controlling the opening of the expansion valve, and frosting efficiency can be improved to a certain extent. When the frosting, defrosting and sterilizing processes are executed, the rotating speed of the corresponding fan can be timely adjusted, the self-cleaning speed of the evaporator can be accelerated to a certain extent, the self-cleaning efficiency is improved, the waiting time of a user is reduced, and the user experience is improved.

Fig. 5 is a flowchart of a self-cleaning control method of an air conditioner according to another embodiment of the present application. Upon determining that the target heat exchanger is a condenser, an embodiment as shown in FIG. 5 is provided, comprising the steps of:

in step S501, when a self-cleaning instruction for cleaning the condenser is received, the target heat exchanger is determined to be the condenser.

In some embodiments of the present application, the specific description of step S501 may refer to step S201 in the embodiment provided in fig. 2, and the description is not repeated here.

Step S502, controlling the air conditioner to operate in a heating mode, and adjusting the rotating speed of a fan corresponding to the condenser to be a first rotating speed.

In some embodiments of the present application, as shown in fig. 3, a corresponding fan may be disposed beside the condenser of the air conditioner, which may be referred to as a condensation side fan. The effect of the setting of condensation side fan can be to increase the air flow, improves the heat exchange efficiency of evaporimeter and ambient air.

When the target heat exchanger is determined to be a condenser, the air conditioner may be controlled to operate in a heating mode. In the heating mode, the rotational speed of the condensing side fan is adjusted to a first rotational speed. Wherein the first rotational speed is less than a preset rotational speed. The preset rotational speed may be a rated rotational speed of the air conditioner when the condensing side fan is operated at a lowest gear wind speed. At this time, the rotation speed of the condensing side fan is reduced, so that the air blown by the evaporating side fan can be prevented from blowing water out of the air conditioner, and the heat exchange efficiency of the evaporator and the ambient air is reduced, so that the condenser is fully hung with water, and the frosting speed is improved.

In step S503, the condensed water in the water storage tank pumped by the water pump is controlled to flow to the condenser.

In some embodiments of the present application, after the target heat exchanger is determined to be a condenser, in order to clean the condenser with condensed water, the condensed water in the water pump-up water storage tank may be controlled to flow to the condenser.

As shown in fig. 3, after the water pump is controlled to pump the condensed water in the water storage tank, the B end of the three-way valve may be opened to allow the condensed water to flow from the B end to the condenser. The description may be specifically combined with the related description of step S203, and will not be repeated here.

Step S504, periodically decreasing the opening of the expansion valve of the air conditioner.

In some embodiments of the present application, the opening degree of the expansion valve of the air conditioner is reduced to accelerate the frosting speed, and the description thereof will be referred to in step S204, and will not be repeated.

In step S505, it is determined whether the temperature of the condenser is less than or equal to the frosting temperature.

In some embodiments of the present application, the temperature of the condenser may be determined by detecting the tube temperature through a temperature sensor during frosting of the condensed water.

By comparing the detected temperature of the condenser with the frosting temperature, it can be determined whether a preset frosting condition is reached. The frosting temperature may be set according to an actual scene, for example, the frosting temperature may be-6 ℃, -5 ℃, -3 ℃, 0 ℃, etc., which is not limited in the present application.

If the temperature of the condenser is greater than the frosting temperature, which indicates that the preset frosting condition is not satisfied, the process returns to step S504, where the opening of the expansion valve of the air conditioner is periodically reduced to accelerate the frosting speed.

If the temperature of the condenser is less than or equal to the frosting temperature, which means that the preset frosting condition has been satisfied and frosting is completed, step S506 may be continued.

Step S506, controlling the air conditioner to operate in a refrigeration mode, and adjusting the rotating speed of the fan corresponding to the condenser to be a second rotating speed.

In some embodiments of the present application, as shown in fig. 3, the fan corresponding to the condenser may be a condenser fan. After the preset frosting condition is reached, the four-way valve can control the air conditioner to switch the operation mode, so that the first operation mode is switched to the second operation mode, namely the heating mode is switched to the refrigerating mode, and the condenser is heated to defrost. At this time, in order to increase the defrosting speed, the condensing side fan may be controlled to adjust the rotation speed at this time to a second rotation speed, wherein the second rotation speed is greater than the first rotation speed, and the rotation speed of the condensing side fan is increased, thereby increasing the defrosting speed.

Step S507, judging whether the temperature of the condenser is greater than or equal to a preset defrosting temperature.

In some embodiments of the present application, the temperature of the condenser is continuously detected after the condenser side fan is adjusted to the second rotational speed.

If the detected temperature of the condenser is smaller than the preset defrosting temperature, the defrosting process is not finished, and the temperature of the condenser can be continuously detected.

If the detected temperature of the condenser is greater than or equal to the preset defrosting temperature, it is determined that the defrosting process of the condenser is finished, and step S508 is continuously performed.

Step S508, the rotating speed of the fan corresponding to the condenser is adjusted to be the third rotating speed.

In some embodiments of the present application, as shown in fig. 3, the fan corresponding to the condenser may be a condensation side fan, and after the defrosting process is determined to be finished, the rotation speed of the condensation side fan may be reduced, that is, the rotation speed at this time is adjusted to a third rotation speed smaller than the second rotation speed, so as to reduce the heat exchange efficiency of the evaporator and ambient air, increase the temperature of the evaporator, and enter the sterilization mode.

Step S509 judges whether the temperature of the condenser is greater than or equal to a preset sterilization temperature and whether the duration is greater than or equal to a preset sterilization duration.

Since many bacteria may be present on the target heat exchanger in addition to the fouling. Thus, sterilization can be performed by the temperature of the condenser after the defrosting process is finished. By comparing the temperature of the condenser with a preset sterilization temperature, it can be determined whether sterilization is completed. The preset sterilization temperature may be set according to actual requirements, for example, the preset sterilization temperature may be set to 45 ℃, 50 ℃, 55 ℃, 60 ℃, or the like, which is not limited in the present application.

In the sterilization period, in order to ensure the sterilization effect, a preset sterilization period can be set, and the duration time of the condenser with the temperature higher than or equal to the preset sterilization temperature is controlled to be longer than or equal to the preset sterilization period. The preset sterilization time period can be set according to actual requirements, for example, the preset sterilization time period can be set to 25min, 30min, 45min and the like, which is not limited in the application.

For example, in some examples, if the preset sterilization temperature is 46 ℃, the preset sterilization period is 25 minutes, and the temperature of the condenser is continuously detected. If the temperature of the condenser is still less than 46 ℃, the temperature of the tube temperature can be continuously detected.

If the temperature of the condenser reaches 46 ℃, the timing is started, if the temperature of the condenser is still maintained at 46 ℃ within 25min, even within a time period greater than 25min, or is greater than 46 ℃, the sterilization is determined to be completed, and the step S510 can be continuously executed to complete the cleaning of the condenser.

Step S510, cleaning the condenser is completed.

After the sterilization process is determined to be finished, the condenser is determined to be cleaned, and the air conditioner can be controlled to exit the self-cleaning mode. Subsequently, the self-cleaning instruction is re-detected, and the self-cleaning mode is re-started from step S501.

In the embodiment of the application, the condenser can be cleaned by utilizing the condensed water, and the cleaning process comprises frosting, defrosting and sterilizing processes, so that the condensed water can be effectively utilized for self-cleaning. In the frosting process, the opening degree of the expansion valve is reduced, the frosting of the surface of the condenser is accelerated, and the frosting efficiency can be improved to a certain extent. In the frosting process, the frosting is accelerated by reducing the rotating speed of the condensing side fan, and the frosting efficiency is also improved to a certain extent. In addition, in the self-cleaning process of the air conditioner, the self-cleaning speed of the air conditioner is improved by combining the adjustment of parameters such as an expansion valve, a fan and the like.

In other embodiments of the present application, to reduce the number of user controls, a self-cleaning instruction capable of cleaning both devices may be set for the user. If a self-cleaning instruction of cleaning the two evaporators is received, the two evaporators may be cleaned according to a preset cleaning sequence, for example, the evaporators may be cleaned preferentially, steps S401 to S410 of the embodiment shown in fig. 4 may be performed, and after the evaporators are cleaned, the condensers may be started to be cleaned, and steps S501 to S510 of the embodiment shown in fig. 5 may be performed. Instead, the condenser may be cleaned before the evaporator, which is not limited in this application.

Fig. 6 is a schematic structural diagram of an air conditioner self-cleaning control device 600 according to an embodiment of the present application. As shown in fig. 6, in the embodiment of the present application, the self-cleaning control device 600 of the air conditioner may be divided into a plurality of functional modules according to the functions performed by the self-cleaning control device, and may include: an instruction receiving module 610, a control module 611, a frosting module 612, a defrosting module 613 and a completion module 614.

The instruction receiving module 610 is configured to determine, when a self-cleaning instruction is received, a target heat exchanger according to the self-cleaning instruction; the target heat exchanger is an evaporator or a condenser.

A control module 611 for controlling the air conditioner to operate in a first operation mode; the first working mode corresponding to the evaporator is a refrigeration mode, and the first working mode corresponding to the condenser is a heating mode.

The control module 611 is further configured to control the water pump to pump condensed water in the water storage tank to flow to the target heat exchanger.

And a frosting module 612, configured to periodically reduce the opening of the expansion valve of the air conditioner until a preset frosting condition is satisfied.

The defrosting module 613 is configured to control the air conditioner to operate in a second operation mode after a preset frosting condition is satisfied; the second working mode corresponding to the evaporator is a heating mode, and the second working mode corresponding to the condenser is a refrigerating mode.

A completion module 614 is configured to complete the response to the self-cleaning instruction when the preset end condition is satisfied.

In some embodiments of the present application, after controlling the air conditioner to operate in the first operation mode, further comprising: the rotating speed of a fan corresponding to the target heat exchanger is adjusted to be a first rotating speed; wherein the first rotational speed is less than a preset rotational speed.

In some embodiments of the present application, further comprising: after the preset frosting condition is met, the rotating speed of the fan corresponding to the target heat exchanger is adjusted to be a second rotating speed; the second rotational speed is greater than the first rotational speed.

In some embodiments of the present application, further comprising: the preset frosting condition includes that the temperature of the target heat exchanger is less than or equal to the preset frosting temperature.

In some embodiments of the present application, after adjusting the rotation speed of the fan corresponding to the target heat exchanger to the second rotation speed, the method further includes: after the preset defrosting condition is met, the rotating speed of the fan corresponding to the target heat exchanger is adjusted to be a third rotating speed; the third rotational speed is less than the second rotational speed.

In some embodiments of the present application, further comprising: the preset defrosting condition is that the temperature of the target heat exchanger is larger than or equal to the preset defrosting temperature, and the duration time is larger than or equal to the preset defrosting duration time.

In some embodiments of the present application, further comprising: the preset end condition is that the temperature of the target heat exchanger is greater than or equal to the preset sterilization temperature, and the duration time is greater than or equal to the preset sterilization time.

In some embodiments of the present application, before controlling the water pump to pump the condensed water in the water storage tank to flow to the target heat exchanger, further comprising: detecting the water level in the water storage tank; if the water level reaches the preset height, executing the step of controlling the water pump to pump condensed water in the water storage tank to flow to the target heat exchanger; if the water level height does not reach the preset height, outputting water adding prompt information.

The self-cleaning control device for air conditioner provided in this embodiment may execute the above method embodiment, and its implementation principle and technical effects are similar, and will not be described here again.

With continued reference to fig. 1, in the present embodiment, the memory 120 may be an internal memory of the air conditioner 100, i.e. a memory built in the air conditioner 100. In other embodiments, the memory 120 may be an external memory of the air conditioner 100, i.e. a memory external to the air conditioner 100.

In some embodiments, the memory 120 is used to store program codes and various data and to enable high-speed, automatic access to programs or data during operation of the air conditioner 100.

The memory 120 may include random access memory, and may also include non-volatile memory, such as a hard disk, memory, plug-in hard disk, smart Media Card (SMC), secure Digital (SD) Card, flash Card (Flash Card), at least one disk storage device, flash memory device, or other volatile solid state storage device.

In one embodiment, the processor 130 may be a central processing unit (Central Processing Unit, CPU), but may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSPs), application specific integrated circuits (Application Specific Integrated Circuit, ASICs), field-programmable gate arrays (Field-Programmable Gate Array, FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any other conventional processor or the like.

The program code and various data in the memory 120 may be stored in a computer readable storage medium if implemented in the form of software functional units and sold or used as a stand alone product. Based on such understanding, the present application implements all or part of the flow of the method of the above embodiments, for example, the self-cleaning control method of the air conditioner, or may be implemented by instructing related hardware by a computer program, where the computer program may be stored in a computer readable storage medium, and the computer program, when executed by a processor, may implement the steps of each method embodiment described above. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, executable files or in some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), or the like.

It will be appreciated that the above-described division of modules into a logical function division may be implemented in other ways. In addition, each functional module in each embodiment of the present application may be integrated in the same processing unit, or each module may exist alone physically, or two or more modules may be integrated in the same unit. The integrated modules may be implemented in hardware or in hardware plus software functional modules.

Finally, it should be noted that the above embodiments are merely for illustrating the technical solution of the present application and not for limiting, and although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present application may be modified or substituted without departing from the spirit and scope of the technical solution of the present application.

Claims (10)

1. A self-cleaning control method of an air conditioner, which is applied to the air conditioner, and is characterized by comprising the following steps:

when a self-cleaning instruction is received, determining a target heat exchanger according to the self-cleaning instruction; the target heat exchanger is an evaporator or a condenser;

controlling the air conditioner to operate in a first working mode; the first working mode corresponding to the evaporator is a refrigeration mode, and the first working mode corresponding to the condenser is a heating mode;

controlling a water pump to pump condensed water in the water storage tank to flow to the target heat exchanger;

periodically reducing the opening of an expansion valve of the air conditioner until a preset frosting condition is met;

after the preset frosting condition is met, controlling the air conditioner to operate in a second working mode; the second working mode corresponding to the evaporator is a heating mode, and the second working mode corresponding to the condenser is a refrigerating mode;

And when the preset end condition is met, completing the response to the self-cleaning instruction.

2. The method of claim 1, wherein after said controlling the air conditioner to operate in the first mode of operation, the method further comprises:

the rotating speed of the fan corresponding to the target heat exchanger is adjusted to be a first rotating speed; wherein the first rotational speed is less than a preset rotational speed.

3. The method according to claim 2, wherein the method further comprises:

after the preset frosting condition is met, the rotating speed of the fan corresponding to the target heat exchanger is adjusted to be a second rotating speed; the second rotational speed is greater than the first rotational speed.

4. The method of claim 1, wherein the preset frosting condition comprises a temperature of the target heat exchanger being less than or equal to a preset frosting temperature.

5. A method according to claim 3, wherein after said adjusting the rotational speed of the fan corresponding to the target heat exchanger to the second rotational speed, the method further comprises:

after the preset defrosting condition is met, the rotating speed of the fan corresponding to the target heat exchanger is adjusted to be a third rotating speed; the third rotational speed is less than the second rotational speed.

6. The method of claim 5, wherein the preset defrosting condition is that the temperature of the target heat exchanger is greater than or equal to a preset defrosting temperature and a duration is greater than or equal to a preset defrosting duration.

7. The method of claim 5, wherein the predetermined end condition is that the temperature of the target heat exchanger is greater than or equal to a predetermined sterilization temperature and the duration is greater than or equal to a predetermined sterilization duration.

8. The method of any one of claims 1 to 7, wherein prior to said controlling the flow of condensate in the pump-up reservoir to the target heat exchanger, the method further comprises:

detecting the water level in the water storage tank;

if the water level reaches the preset height, executing the step of controlling the water pump to pump condensed water in the water storage tank to flow to the target heat exchanger;

and if the water level height does not reach the preset height, outputting a water adding prompt message.

9. An air conditioner comprising a heat exchanger, an expansion valve, a water storage tank, a water pump, a processor and a memory, the processor being for executing a computer program stored in the memory to implement the self-cleaning control method of an air conditioner according to any one of claims 1 to 8.

10. A computer readable storage medium storing at least one instruction that when executed by a processor implements the self-cleaning control method of an air conditioner according to any one of claims 1 to 8.