WO2019024681A1

WO2019024681A1 - Control method and device for self-cleaning of air conditioner

Info

Publication number: WO2019024681A1
Application number: PCT/CN2018/096148
Authority: WO
Inventors: 魏菡; 樊明敬; 吕福俊; 臧金玲; 赵丹; 周宝娟
Original assignee: 青岛海尔空调器有限总公司
Priority date: 2017-07-31
Filing date: 2018-07-18
Publication date: 2019-02-07
Also published as: CN107525221A

Abstract

The present invention relates to the field of air conditioner self-cleaning techniques. Provided are a control method and device for self-cleaning of an air conditioner. The method comprises: acquiring an operating parameter of an air conditioner in a frosting stage under a self-cleaning mode (S304); if the operating parameter satisfies a preset air blower activation condition, controlling start of operation of an inner air blower (S305, S306); and if the operating parameter satisfies a preset air blower deactivation condition, controlling end of operation of the inner air blower (S307, S308). The control method for self-cleaning of an air conditioner controls operating states of an inner air blower in a frosting stage according to preset air blower activation and deactivation conditions, such that the inner air blower can be activated to ensure uniform distribution of vapor in an indoor unit, or the inner air blower can be deactivated to lower an evaporating pressure in the indoor unit so as to facilitate lowering a temperature in the indoor unit, thereby enhancing frosting efficiency of an air conditioner.

Description

Air conditioner self-cleaning control method and device

The present application is filed on the basis of the Chinese Patent Application No. PCT Application Serial No.

Technical field

This paper relates to the field of self-cleaning technology for air conditioners, and in particular relates to a control method and device for self-cleaning of air conditioners.

Background technique

When the indoor unit of the air conditioner operates in the cooling or heating mode, the air in the indoor environment enters the interior of the indoor unit along the air inlet of the indoor unit, and is re-blowed into the indoor environment through the air outlet after the heat exchange piece is exchanged, During this process, impurities such as dust and large particles trapped in the indoor air will enter the indoor unit along with the airflow, although the dust filter installed at the air inlet of the indoor unit can filter most of the dust and particles. However, there will still be a small amount of tiny dust that cannot be completely blocked by filtration. With the long-term use of the air conditioner, the dust will gradually deposit on the surface of the heat exchange sheet, and the dust covering the outer surface of the heat exchanger is inferior in thermal conductivity. It will directly affect the heat exchange between the heat exchange sheet and the indoor air. Therefore, in order to ensure the heat exchange efficiency of the indoor unit, the indoor unit needs to be cleaned regularly.

Generally, the cleaning method of the indoor unit of the air conditioner in the prior art mainly includes two methods of manual cleaning and self-cleaning of the air conditioner, wherein the self-cleaning method of the air conditioner is mainly divided into a frosting stage and a defrosting stage, wherein, in the condensation In the frost stage, the air conditioner operates in the cooling mode first, and increases the refrigerant output of the indoor heat exchanger, so that the moisture in the indoor air can gradually condense into frost or ice layer on the outer surface of the heat exchanger. The condensed ice layer can be combined with dust to strip the dust from the outer surface of the heat exchanger; afterwards, during the defrosting stage, the air conditioner operates in the heating mode to melt the frost layer condensed on the outer surface of the heat exchanger. The dust will also collect into the water tray with the melted water flow, so that the self-cleaning effect of the air conditioner can be achieved.

However, in the self-cleaning process of the existing air conditioner, the inner fan of the indoor unit is generally in a closed state or a continuous low wind speed during the frosting stage, and the actual application process may affect the frosting speed and the frosting effect of the indoor heat exchanger. For example, when the inner fan is always off, there is no air circulation on the surface of the heat exchanger, and the moisture content in the air near the heat exchanger is limited, so that the thickness of the frost layer grows slowly; while the inner fan continues to run at a low wind speed. Since there is always air flow on the surface of the indoor heat exchanger, the evaporation pressure is higher than that of the indoor fan, so that the indoor heat exchanger takes a long time to fall below the freezing point and begin to frost. Therefore, the operation state of the internal fan in the existing self-cleaning process of the air conditioner cannot achieve a good function of promoting the frosting.

Summary of the invention

This paper provides a self-cleaning control method and device for air conditioners, which aims to solve the problem that the internal fan operation mode of the existing self-cleaning condensation stage affects the condensation efficiency. In order to have a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This generalization is not a general comment, nor is it intended to identify key/critical constituent elements or to describe the scope of protection of these embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the following detailed description.

According to a first aspect of the present invention, a method for controlling self-cleaning of an air conditioner is provided, the method comprising: obtaining an operating parameter of a condensation stage of the air conditioner when operating the self-cleaning mode; and when the operating parameter satisfies a preset fan opening condition, Controls the operation of the internal fan; when the operating parameter meets the preset fan closing condition, the control turns off the operation of the internal fan.

Further, the operating parameter includes at least: a current running time accumulated by the compressor, a first current coil temperature of the inner coil, an interval between the current time and a last closing time of the inner fan; the fan opening condition includes at least: When the air conditioner starts to run the self-cleaning mode, the current running time is greater than or equal to the preset running time threshold; the first current coil temperature is less than or equal to the preset first coil temperature threshold; the interval duration is greater than the preset interval duration threshold.

Further, the operating parameter includes at least: a current single running time of the inner fan and a second current coil temperature of the inner coil; and the fan closing condition at least includes: the current single running time is greater than or equal to a preset single running time threshold The second current coil temperature is greater than or equal to a preset second coil temperature threshold, wherein the second coil temperature threshold is greater than the first coil temperature threshold and less than the condensation critical temperature.

Further, the method further includes: obtaining a current indoor temperature of the air-conditioned space; and determining a critical temperature of the frost according to the indoor temperature.

Further, the method further includes: when the air conditioner satisfies the defrosting condition, controlling the air conditioner to switch into the defrosting phase of the self-cleaning mode, and controlling the inner fan to continuously operate at the set speed.

According to a second aspect of the present invention, a self-cleaning control device for an air conditioner is provided, the device comprising: an acquisition module, configured to acquire an operating parameter of a condensation stage of the air conditioner when the self-cleaning mode is operated; and a main control module, configured to When the running parameter meets the preset fan opening condition, the control turns on the operation of the inner fan; and when the running parameter satisfies the preset fan closing condition, the control turns off the operation of the inner fan.

Further, the obtaining module is further configured to acquire a current indoor temperature of the air-conditioned space; the device further includes a determining module, and the determining module is configured to determine a frosting critical temperature according to the indoor temperature.

Further, the device further includes a switching module, configured to: when the air conditioner meets the defrosting condition, control the air conditioner to switch into a defrosting phase of the self-cleaning mode, and control the inner fan to continuously operate at the set speed.

The self-cleaning control method of the present invention controls the running state of the inner fan in the frosting stage according to the preset fan opening and closing conditions, thereby ensuring that the water vapor is evenly distributed in the indoor unit by running the inner fan, or can be lowered by closing the inner fan. The evaporation pressure in the indoor unit speeds up the internal temperature of the indoor unit to ensure the condensation efficiency of the air conditioner.

The above general description and the following detailed description are merely exemplary and explanatory and are not limiting.

DRAWINGS

The drawings herein are incorporated in and constitute a part of the specification, and are in the

1 is a flow chart 1 of an air conditioner self-cleaning control method according to an exemplary embodiment of the present invention;

2 is a schematic diagram showing changes in internal fan speed of the air conditioner self-cleaning control method according to an exemplary embodiment;

3 is a second flowchart of a self-cleaning control method for an air conditioner according to an exemplary embodiment of the present invention;

4 is a block diagram showing the structure of a self-cleaning control device as described herein, according to an exemplary embodiment.

Detailed ways

The following description and the annexed drawings are intended to illustrate the specific embodiments herein Other embodiments may include structural, logical, electrical, process, and other changes. The examples represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operations may vary. Portions and features of some embodiments may be included or substituted for portions and features of other embodiments. The scope of the embodiments herein includes the full scope of the claims, and all equivalents of the claims. In this context, various embodiments may be referred to individually or collectively by the term "invention," for convenience only, and if more than one invention is disclosed, it is not intended to automatically limit the scope of the application to any A single invention or inventive concept. Herein, relational terms such as first and second are used merely to distinguish one entity or operation from another entity or operation, and do not require or imply any actual relationship between the entities or operations or order. Furthermore, the terms "comprises" or "comprising" or "comprising" or any other variations are intended to encompass a non-exclusive inclusion, such that a process, method, or device that includes a plurality of elements includes not only those elements but also other items not specifically listed. Elements, or elements that are inherent to such a process, method, or device. An element that is defined by the phrase "comprising a ..." does not exclude the presence of additional equivalent elements in the process, method, or device that comprises the element. The various embodiments herein are described in a progressive manner, and each embodiment focuses on differences from other embodiments, and the same similar parts between the various embodiments may be referred to each other. For the method, product, and the like disclosed in the embodiments, since it corresponds to the method part disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

Generally, the existing air conditioner includes an indoor heat exchanger, an outdoor heat exchanger, a throttle device, and a compressor, and the indoor heat exchanger, the outdoor heat exchanger, the throttling device, and the compressor are connected by a refrigerant pipe to constitute a refrigerant cycle. The circuit and the refrigerant flow through the flow path set by the refrigerant circulation circuit along different operation modes to realize functions such as heating, cooling and defrosting.

In an embodiment, the operating modes of the air conditioner herein include a cooling mode, a heating mode, and a self-cleaning mode, wherein the cooling mode is generally applied to a high temperature condition in summer to reduce the indoor ambient temperature; and the heating mode is generally applied to a low temperature in winter. The working condition is used to raise the indoor ambient temperature; while the self-cleaning mode is generally the user's self-selected function mode, which can automatically clean the heat exchanger in the case of more dust and dirt accumulated on the heat exchanger.

Generally, since the indoor heat exchanger is a heat exchanger directly used to change the indoor temperature environment, the cleanness of the indoor heat exchanger can directly affect the user experience. Therefore, the main application object of the self-cleaning mode of the existing air conditioner is the indoor heat exchanger, and the self-cleaning process in the subsequent embodiment is also the self-cleaning object of the indoor heat exchanger. However, this does not mean that the control method of this paper cannot be applied to the self-cleaning operation of the outdoor heat exchanger. It should be understood that if the existing air conditioner adopts the same or similar control method as described herein, the outdoor heat exchanger is self-contained. Cleaning operations should also be included in the scope of this article.

When the air conditioner operates in the cooling mode, the refrigerant flow direction is that the high-temperature refrigerant discharged from the compressor first flows through the outdoor heat exchanger to exchange heat with the outdoor environment, and then exchanges heat with the indoor environment in the inflowing indoor heat exchanger, and finally the refrigerant flows back to The compressor is recompressed; in this process, the refrigerant flowing through the outdoor heat exchanger releases heat to the outdoor environment, and the refrigerant flowing through the indoor heat exchanger absorbs heat from the indoor environment, and the refrigerant circulates through the refrigerant circulation loop. The flow can continuously discharge the heat in the room to the outdoor environment, so that the cooling purpose of reducing the indoor ambient temperature can be achieved.

The high-temperature refrigerant discharged from the refrigerant flow in the heating mode operation to the compressor first flows through the indoor heat exchanger to exchange heat with the outdoor environment, and then exchanges heat with the indoor environment in the outdoor heat exchanger, and finally the refrigerant returns. The compressor is recompressed; in this process, the refrigerant flowing through the indoor heat exchanger releases heat to the indoor environment, and the refrigerant flowing through the outdoor heat exchanger absorbs heat from the outdoor environment, and the refrigerant passes through the refrigerant circulation loop. The circulating flow can continuously release the outdoor heat to the indoor environment, so that the heating effect of improving the indoor ambient temperature can be achieved.

The workflow of the air conditioner running in the self-cleaning mode mainly includes the two stages of the frosting stage and the defrost stage, wherein the frosting mode is operated in the frosting stage to coagulate the indoor heat exchanger of the indoor unit. Ice frosting; the defrosting mode is run during the defrosting phase to melt the frost that the indoor heat exchanger condenses during the first frosting stage.

Specifically, in the operation mode of the existing air conditioner, if the power of the compressor is increased and the output of the refrigerant is increased, the amount of the low-temperature refrigerant input into the indoor unit can be increased, and the excess refrigerant can be used to make the interior of the indoor unit. When the temperature inside the indoor unit is lower than the critical temperature of the condensation (such as 0 ° C), the water vapor flowing through the indoor unit will gradually condense into frost inside the indoor unit. Therefore, the control method in this paper is In the case where the air conditioner is in the direction of the refrigerant defined by the cooling mode, the frosting operation of the indoor heat exchanger is realized by adjusting the operating parameters of the components such as the compressor, the internal fan, and the throttle device.

Similarly, in the operation mode of the existing air conditioner, since the high-temperature refrigerant first flows through the indoor heat exchanger, the cold amount of the high-temperature refrigerant can increase the internal temperature of the indoor unit, and the temperature inside the indoor unit. Above the critical temperature value of the condensation (such as 0 ° C), the frost that condenses inside the indoor unit will gradually melt and drip, so that the frost can be separated from the indoor heat exchanger. In the control method of the present invention, the defrosting operation of the indoor heat exchanger is realized by adjusting the operating parameters of the compressor, the internal fan, the throttling device and the like in the case where the refrigerant flows in the heating mode.

The self-cleaning process of the air conditioner herein will be described below in conjunction with specific embodiments.

FIG. 1 is a flow chart 1 of an air conditioner self-cleaning control method according to an exemplary embodiment.

As shown in FIG. 1 , the present invention provides a self-cleaning control method for an air conditioner, which can be used for controlling the cleaning process of the heat exchanger of the air conditioner. Specifically, the control method includes:

S110. Acquire an operating parameter of a condensation stage of the air conditioner when running the self-cleaning mode;

The control method in this paper mainly controls the opening or closing of the internal fan according to the operating parameters of the frosting stage. In this embodiment, the relevant operating parameters for determining the opening of the fan include at least the following: the current running time of the compressor, and the inner coil The interval between the first current coil temperature and the current time and the last closing time of the internal fan.

Among them, for the current running time of the compressor, in general, the compressor is continuously running in the frosting stage and the defrosting stage, and only during the process of switching the cooling flow direction of the condensation stage to the heating flow direction of the defrosting stage. Interrupted for a certain period of time, because the control method of this paper is mainly for the internal fan opening and closing control during the frosting stage, therefore, the compressor is continuously running during the frosting stage, and the current running time of the compressor is the air conditioner switched from the previous mode. The length of time from the start of the self-cleaning mode operation to the initial time of the current control flow.

It should be understood that since the air-conditioning self-cleaning frosting stage lasts for a certain period of time, the air conditioner of this paper will judge whether the fan opening condition or the closing condition is satisfied multiple times, so that the condition judgment can be performed again according to the real-time working condition, so that the air conditioner is inside. The fan operation is adapted to the current operating conditions. In this way, the flow of the control method in this paper is executed multiple times during the frosting phase. Therefore, the foregoing control flow is the flow corresponding to the control method executed by the current number of times.

In the embodiment, since the refrigerant delivered to the air-conditioner refrigerant circulation system by the compressor per unit time can be regarded as a quantitative amount, the operation time of the compressor directly determines the amount of the refrigerant to be delivered to the indoor heat exchanger, and the operation of the compressor The longer the duration, the more refrigerant is delivered. Conversely, the less the refrigerant is. In this way, it can be judged whether the sufficient amount of refrigerant has been delivered to the indoor heat exchanger during the frosting stage according to the current running time of the compressor. In the case where the heat exchanger already has enough refrigerant for the frosting, the fan will not open until the evaporation pressure is too high, so as to avoid the duration of the frosting phase being too long.

For the first current coil temperature of the inner coil, a temperature sensor is disposed on the inner coil of the indoor unit, which can be used to detect the real-time temperature of the inner coil in the current control flow, which is the current control process. First current coil temperature.

In the present embodiment, since the self-cleaning process requires condensation of water vapor in the air flowing through the indoor unit on the inner coil and the fins of the heat exchanger, the real-time temperature of the inner coil in direct contact with the air It can directly affect whether the water vapor is condensed. Only when the real-time temperature of the inner coil is below the critical temperature of the frost, the water vapor will gradually condense into frost in the indoor unit, and the actual temperature of the inner coil is higher than At the critical temperature of the condensation, the water vapor will not condense and the original condensed frost will gradually melt and vaporize. Therefore, according to the first current coil temperature of the inner coil, it can be determined whether the indoor unit reaches the temperature condition of condensation in the frosting stage, and when the temperature condition of the condensation is reached, the evaporation pressure is not caused when the fan is turned on. Too high to avoid the duration of the frosting phase is too long.

For the interval between the current time and the last closing time of the internal fan, it has been explained in the foregoing embodiment that the control flow of this article will be executed multiple times, and the internal fan may be controlled to be turned on or off multiple times, therefore, in order to avoid The internal fan frequently turns on or off the loss caused by the internal fan itself, and the fan opening needs to meet the condition that the time interval from the previous closing time should not be too short.

In addition, the relevant operating parameters that determine the opening of the fan include at least the following: the current single running time of the inner fan and the second current coil temperature of the inner coil.

Among them, for the current single operation time of the internal fan, the same is to avoid the internal fan to frequently open or close the loss caused by the internal fan itself, the fan needs to meet the conditions that the continuous operation time should not be too short.

For the second current coil temperature of the inner coil, when the inner fan is turned on, since the indoor temperature is generally higher than the internal temperature of the indoor unit during the frosting stage, the inner fan introduces some of the indoor hot air into the indoor unit. Internally, the temperature inside the indoor unit rises. When the actual temperature of the inner coil is higher than the critical temperature of the condensation, the water vapor will not condense and the original condensed frost will gradually melt and vaporize, which will affect the frosting. The condensation efficiency of the stage, therefore, it can be judged according to the second current coil temperature of the inner coil whether the operation of the inner fan needs to be turned off to avoid the temperature inside the indoor unit being too high.

It should be understood that the second current coil temperature can also be detected by using a temperature sensor disposed in the indoor unit in the foregoing embodiment. In order to distinguish the real-time temperature of the inner coil detected by different control flows, this paper will The detected coil temperature is defined as a first current coil temperature and a second current coil temperature.

S121. When the running parameter meets the preset fan opening condition, the control starts the operation of the inner fan;

In this embodiment, the fan opening condition at least includes: when the air conditioner starts to run the self-cleaning mode, the current running time of the compressor is greater than or equal to a preset running time threshold; the first current coil temperature is less than or equal to the preset The first coil temperature threshold; the interval duration is greater than a preset interval duration threshold.

In this embodiment, the operating time threshold corresponds to the minimum amount of refrigerant used by the compressor to deliver the frost to the indoor heat exchanger. Therefore, when the current running time of the compressor is greater than or equal to the operating time threshold, The amount of refrigerant flowing through the indoor heat exchanger can satisfy the amount of refrigerant in the self-cleaning condensation stage of the air conditioner.

Generally, since the running time of the compressor is increased in time, when a certain control process satisfies the requirement of the running time, the running time of the subsequent other times of the control flow also satisfies the requirement of the running time.

In the embodiment, in order to accelerate the condensation speed of the water vapor, the preset first coil temperature threshold is generally lower than the condensation critical temperature, thereby ensuring the frosting efficiency in the frosting stage.

S122: When the running parameter meets the preset fan closing condition, the control turns off the operation of the inner fan.

In this embodiment, the fan closing condition includes: the current single running time is greater than or equal to a preset single running time threshold; and the second current coil temperature is greater than or equal to a preset second coil temperature threshold, wherein The second coil temperature threshold is greater than the first coil temperature threshold and less than the condensation critical temperature.

In this embodiment, the control flow of the present invention is executed multiple times in the frosting stage. In the case where the internal fan is in the open state in the previous control flow, if the fan opening condition is still satisfied in the current control flow, the internal fan is maintained. Operation, if the fan closing condition is met, the control closes the operation of the inner fan; and in the case that the inner fan is in the off state in the previous control process, if the fan opening condition is satisfied in the current control process, the control is turned on to operate the inner fan If the fan closing condition is still met, the internal fan is kept off.

FIG. 2 is a schematic diagram showing the change of the internal fan speed in an embodiment. As shown in FIG. 2, the actual change of the internal fan speed in the condensation stage of the control method of this paper approximates the form of the pulse signal, and correspondingly, the temperature of the inner coil. It is followed by a trend of approximating the wave; during the above-mentioned change of the internal fan speed, the components such as the coil are faster than the existing method, shortening the running time of the frosting stage, improving the frosting efficiency, and effectively reducing The amount of electricity consumed by the air conditioner to run the self-cleaning function.

In this embodiment, the air conditioner prestores one or more sets of threshold parameter combinations in the foregoing embodiments, wherein, for the first coil temperature threshold and the second coil temperature threshold, since neither is greater than the frost critical parameter, Before the air conditioner performs the foregoing control flow, it is required to obtain the current indoor temperature of the air-conditioned space, and determine the critical temperature of the condensation according to the indoor temperature; thus, the selected temperature can be selected according to the critical temperature of the condensation determined by the current indoor temperature condition. Threshold parameter.

In an embodiment, when the air conditioner satisfies the defrosting condition, the air conditioner is controlled to switch into the defrosting phase of the self-cleaning mode, and the inner fan is controlled to continue to operate at the set speed.

FIG. 3 is a second flowchart of a self-cleaning control method according to an exemplary embodiment. In the application scenario shown in FIG. 3, the specific process of the control method is as follows:

S301. Receive a self-cleaning instruction input by a user.

In this embodiment, the user selects a preset self-cleaning option through the remote controller or the control panel, and determines; the remote controller or the control panel sends a self-cleaning command to the main controller of the air conditioner, and the main controller of the air conditioner receives the self-cleaning command. After the cleaning command, the air conditioner can be controlled to enter the self-cleaning mode;

Or, the air conditioner can preset the self-determination program that the air conditioner needs to go into self-cleaning, so that the air conditioner can also determine whether to run the self-cleaning mode by its own intelligent judgment;

S302. The air conditioner enters a self-cleaning mode;

In this embodiment, generally, when the air conditioner enters the self-cleaning mode, the air temperature entering the indoor unit is close to the indoor ambient temperature, so the inner fan is generally controlled to be closed to reduce the flow of the higher temperature air inside the indoor unit. So that the internal temperature of the indoor unit is lowered to the critical temperature of the condensation as soon as possible;

S303. The air conditioner operates in a self-cleaning mode of the frosting mode;

In the present embodiment, when the air conditioner operates the frosting mode, the refrigerant flows in the same manner as the refrigerant in the cooling mode, and at the same time, the temperature inside the indoor unit is lowered by closing the indoor air outlet and increasing the operating frequency of the compressor. a low temperature environment in which the inside of the indoor unit forms condensation of water into frost;

S304. Acquire an operating parameter of the air conditioner in a frosting stage;

In this embodiment, the acquired operating parameters include, but are not limited to, the current running time of the compressor, the first current coil temperature of the inner coil, and the interval between the current time and the last closing time of the inner fan;

And, the current single run time of the inner fan and the second current coil temperature of the inner coil.

S305, it is determined whether the fan open condition is met, if yes, step S306 is performed, if no, step S309 is performed;

S306. Controlling the operation of the internal fan;

In this embodiment, if the inner fan is already in an open state before determining that the fan opening condition is satisfied, maintaining the current open state of the inner fan;

S307, it is determined whether the fan shutdown condition is met, if yes, step S308 is performed, and if not, step S09 is performed;

S308. Control to shut down operation of the inner fan;

In this embodiment, if the inner fan is already in the off state before determining that the fan closing condition is satisfied, maintaining the current operating state of the inner fan;

S309, maintaining the current running state;

S310, determining whether the air conditioner meets the preset defrosting condition, if yes, proceeding to step S311, and if not, proceeding to step S303;

S311. Control the air conditioner to switch into a defrosting phase of the self-cleaning mode, and control the inner fan to continuously operate at the set speed.

S312, the self-cleaning process ends.

It can be seen from the above control flow that if the two determination conditions of steps S305 and S307 are not satisfied, the current operating state of the air conditioner is maintained, and when one of the determination conditions in the embodiment is satisfied, the judgment is followed. The corresponding steps of the condition perform the corresponding control flow.

4 is a block diagram showing the structure of the self-cleaning control device herein, according to an exemplary embodiment.

The present invention provides a self-cleaning control device for an air conditioner, which can be used to control an air conditioner to perform the self-cleaning control process shown in the foregoing embodiments. Specifically, the device includes:

The obtaining module 410 is configured to acquire an operating parameter of the air-conditioning stage of the air conditioner when the self-cleaning mode is running;

The main control module 420 is configured to control the operation of the internal fan when the operating parameter satisfies the preset fan opening condition; and control the operation of the internal fan to be turned off when the operating parameter satisfies the preset fan closing condition.

In this embodiment, the operating parameter includes at least: a current running time accumulated by the compressor, a first current coil temperature of the inner coil, an interval between the current time and a last closing time of the internal fan; and the fan opening condition is at least The method includes: when the air conditioner starts to run the self-cleaning mode, the current running time is greater than or equal to a preset running time threshold; the first current coil temperature is less than or equal to a preset first coil temperature threshold; the interval duration is greater than a preset interval. Duration threshold.

In this embodiment, the operating parameter includes at least: a current single running time of the inner fan and a second current coil temperature of the inner coil; and the fan closing condition includes at least: the current single running time is greater than or equal to the preset single time The operating time threshold is; the second current coil temperature is greater than or equal to a preset second coil temperature threshold, wherein the second coil temperature threshold is greater than the first coil temperature threshold and less than the frost critical temperature.

In this embodiment, the obtaining module 410 is further configured to acquire a current indoor temperature of the air-conditioned space; the device further includes a determining module 430, and the determining module 430 is configured to determine a frosting critical temperature according to the indoor temperature.

In this embodiment, the device further includes a switching module 440, configured to: when the air conditioner meets the defrosting condition, control the air conditioner to switch into the defrosting phase of the self-cleaning mode, and control the inner fan to continuously run at the set speed .

It should be understood that the present invention is not limited to the details and the modifications and changes may be made without departing from the scope thereof. The scope of the disclosure is limited only by the accompanying claims.

Claims

A method for controlling self-cleaning of an air conditioner, characterized in that the method comprises:

Obtaining operating parameters of the air conditioning stage during the self-cleaning mode of the air conditioner;

Controlling the operation of the internal fan when the operating parameter satisfies a preset fan opening condition;

When the operating parameter satisfies a preset fan closing condition, the control turns off the operation of the inner fan.
The control method according to claim 1, wherein the operating parameter comprises at least: a current running time accumulated by the compressor, a first current coil temperature of the inner coil, a current time, and the last time of the inner fan. The length of time between closing times;

The fan opening condition includes at least:

When the air conditioner starts to run the self-cleaning mode, the current running time is greater than or equal to a preset running time threshold;

The first current coil temperature is less than or equal to a preset first coil temperature threshold;

The interval duration is greater than a preset interval duration threshold.
The control method according to claim 2, wherein the operating parameter comprises at least: a current single running time of the inner fan and a second current coil temperature of the inner coil;

The fan closing condition includes at least:

The current single running time length is greater than or equal to a preset single running time threshold;

The second current coil temperature is greater than or equal to a preset second coil temperature threshold, wherein the second coil temperature threshold is greater than the first coil temperature threshold and less than a frost critical temperature.
The control method according to claim 3, wherein the method further comprises:

Obtaining the current indoor temperature of the space in the air conditioner;

The condensation critical temperature is determined based on the indoor temperature.
The control method according to claim 1, wherein the method further comprises:

When the air conditioner satisfies the defrosting condition, the air conditioner is controlled to switch into the defrosting phase of the self-cleaning mode, and the inner fan is controlled to continue to operate at the set speed.
A self-cleaning control device for an air conditioner, characterized in that the device comprises:

Obtaining a module, configured to obtain an operating parameter of a condensation stage of the air conditioner when running the self-cleaning mode;

a main control module, configured to control the operation of the internal fan when the operating parameter meets a preset fan opening condition;

When the operating parameter satisfies a preset fan closing condition, the control turns off the operation of the inner fan.
The control device according to claim 6, wherein the operating parameter comprises at least: a current running time accumulated by the compressor, a first current coil temperature of the inner coil, a current time, and the last time of the inner fan The length of time between closing times;

The fan opening condition includes at least:

When the air conditioner starts to run the self-cleaning mode, the current running time is greater than or equal to a preset running time threshold;

The first current coil temperature is less than or equal to a preset first coil temperature threshold;

The interval duration is greater than a preset interval duration threshold.
The control device according to claim 7, wherein the operating parameter comprises at least: a current single running time of the inner fan and a second current coil temperature of the inner coil;

The fan closing condition includes at least:

The current single running time length is greater than or equal to a preset single running time threshold;

The second current coil temperature is greater than or equal to a preset second coil temperature threshold, wherein the second coil temperature threshold is greater than the first coil temperature threshold and less than a frost critical temperature.
The control device according to claim 8, wherein

The obtaining module is further configured to acquire a current indoor temperature of the space in the air conditioner;

The apparatus also includes a determination module for determining the condensation critical temperature based on the indoor temperature.
The control device according to claim 6, wherein the device further comprises a switching module, wherein the switching module is configured to:

When the air conditioner satisfies the defrosting condition, the air conditioner is controlled to switch into the defrosting phase of the self-cleaning mode, and the inner fan is controlled to continue to operate at the set speed.