CN110736197B

CN110736197B - Method and device for self-cleaning of air conditioner and air conditioner

Info

Publication number: CN110736197B
Application number: CN201910993600.5A
Authority: CN
Inventors: 李鹏; 张千
Original assignee: Qingdao Haier Air Conditioner Gen Corp Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Air Conditioner Gen Corp Ltd; Haier Smart Home Co Ltd
Priority date: 2019-10-18
Filing date: 2019-10-18
Publication date: 2021-09-21
Anticipated expiration: 2039-10-18
Also published as: CN110736197A

Abstract

The application relates to the technical field of air conditioner self-cleaning, and discloses a method for air conditioner self-cleaning. The method for self-cleaning of the air conditioner comprises the following steps: and after the air conditioner enters a self-cleaning mode, the temperature of the heat exchanger is reduced, water is sprayed to the surface of the heat exchanger in the process of cooling the heat exchanger, and the water spraying amount is adjusted according to the running frequency of the compressor. After the air conditioner enters the self-cleaning mode, the water spraying amount is adjusted according to the running frequency of the compressor, and the phenomenon that the water spraying amount is too much or not enough can be reduced. The application also discloses a device and an air conditioner for air conditioner self-cleaning.

Description

Method and device for self-cleaning of air conditioner and air conditioner

Technical Field

The present application relates to the technical field of air conditioner self-cleaning, and for example, to a method and an apparatus for air conditioner self-cleaning, and an air conditioner.

Background

At present, when an air conditioner is self-cleaned, the surface of a heat exchanger is required to be frosted firstly and then defrosted. The self-cleaning effect can be improved by appropriately increasing the amount of frost on the surface of the heat exchanger, for example, by spraying water onto the surface of the heat exchanger using a spray device.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

the water spraying amount can not be adjusted, and the phenomenon of insufficient or excessive water spraying amount is easy to occur.

Disclosure of Invention

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.

The embodiment of the disclosure provides a method and a device for self-cleaning of an air conditioner and the air conditioner, so as to solve the technical problem that the phenomenon of insufficient or excessive water spraying amount is easy to occur.

In some embodiments, a method for air conditioning self-cleaning includes:

the temperature of the heat exchanger is reduced after the air conditioner enters a self-cleaning mode;

and spraying water to the surface of the heat exchanger in the cooling process of the heat exchanger, and adjusting the water spraying amount according to the running frequency of the compressor.

In some embodiments, an apparatus for air conditioning self-cleaning includes a processor and a memory storing program instructions, the processor being configured to, when executing the program instructions, perform the method for air conditioning self-cleaning provided by the foregoing embodiments.

In some embodiments, the air conditioner comprises the device for self-cleaning of the air conditioner provided by the previous embodiments.

The method and the device for self-cleaning of the air conditioner and the air conditioner provided by the embodiment of the disclosure can realize the following technical effects:

after the air conditioner enters the self-cleaning mode, the water spraying amount is adjusted according to the running frequency of the compressor, and the phenomenon that the water spraying amount is too much or not enough can be reduced.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated in drawings corresponding to, and not limiting to, embodiments in which elements having the same reference number designation are illustrated as similar elements and in which:

fig. 1 is a schematic flow chart of a method for self-cleaning of an air conditioner according to an embodiment of the present disclosure;

FIG. 2 is a schematic flow diagram illustrating a method for adjusting the amount of water injection based on the temperature of a heat exchanger according to an embodiment of the present disclosure;

FIG. 3 is a schematic flow chart illustrating a method for adjusting the amount of water injection according to the temperature of a heat exchanger according to an embodiment of the present disclosure;

fig. 4 is a schematic flow chart of a method for self-cleaning of an air conditioner according to an embodiment of the disclosure;

FIG. 5 is a schematic flow chart illustrating the adjustment of the amount of water injected according to the operating frequency of the compressor provided by the embodiments of the present disclosure;

FIG. 6 is a schematic flow chart illustrating the adjustment of the amount of water injected according to the operating frequency of the compressor provided by the embodiments of the present disclosure;

FIG. 7 is a schematic flow chart diagram illustrating a method for self-cleaning of an air conditioner according to an embodiment of the present disclosure;

FIG. 8 is a schematic flow chart illustrating adjusting the amount of water sprayed according to the cooling time according to an embodiment of the present disclosure;

FIG. 9 is a schematic flow chart illustrating adjusting the amount of water sprayed according to the cooling time according to an embodiment of the present disclosure;

fig. 10 is a schematic view of an apparatus for self-cleaning of an air conditioner according to an embodiment of the present disclosure.

Detailed Description

So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.

In the disclosed embodiment, the amount of water sprayed refers to the amount of water sprayed onto the heat exchanger surface, and may be measured in terms of the volume of water sprayed onto the heat exchanger, or in terms of the mass of water sprayed onto the heat exchanger surface.

The embodiment of the disclosure provides a method for self-cleaning of an air conditioner.

Fig. 1 is a schematic flow chart of a method for self-cleaning of an air conditioner according to an embodiment of the present disclosure.

In this embodiment, a method for air conditioning self-cleaning, includes:

and S101, reducing the temperature of the heat exchanger after the air conditioner enters a self-cleaning mode.

In the self-cleaning mode of the air conditioner, the temperature of the heat exchanger is firstly reduced to frost the surface of the heat exchanger, and then the temperature of the heat exchanger is increased to melt the frost on the surface of the heat exchanger. In the process of frosting, water on the surface of the heat exchanger is changed into a solid state from a liquid state, the volume is increased, an expansion force is generated, pollutants attached to the surface of the heat exchanger are separated from the surface of the heat exchanger under the action of the expansion force, in the defrosting process, frost is melted to form water flow, and the water flow can flush away the pollutants separated from the surface of the heat exchanger.

The method for self-cleaning of the air conditioner is used for the frosting process of the surface of the heat exchanger, and the temperature of the heat exchanger tends to decrease in the frosting process. The operating frequency of the compressor can be increased to reduce the temperature of the heat exchanger surfaces.

And S102, spraying water to the surface of the heat exchanger in the cooling process of the heat exchanger, and adjusting the water spraying amount according to the temperature of the heat exchanger.

When water is sprayed to the surface of the heat exchanger, water flow can attach to the surface of the heat exchanger, and the water attached to the surface of the heat exchanger can frost in the process of reducing the temperature of the heat exchanger. The water on the surface of the heat exchanger can also come from the water vapor in the air, when the temperature of the heat exchanger is lower, the water vapor in the air can generate condensation on the surface of the heat exchanger, and in the process, the water condensation releases heat and consumes electric energy. In the embodiment of the disclosure, the water required by the frosting on the surface of the heat exchanger is not only from the condensation, but also from the water sprayed on the surface of the heat exchanger, so that the electric energy required by the condensation process on the surface of the heat exchanger is reduced, and the energy is saved. Furthermore, after the air conditioner enters the self-cleaning mode, the water spraying amount is adjusted according to the temperature of the heat exchanger, the accuracy of the water spraying amount of the water sprayed to the surface of the heat exchanger can be improved, and the phenomenon that the water spraying amount is too much or insufficient is reduced.

In the embodiment of the present disclosure, the spraying device may be configured to spray water to the side surface of the heat exchanger, or may be configured to spray water from the side surface of the heat exchanger.

Fig. 2 is a schematic flow chart illustrating a process of adjusting the amount of water injection according to the temperature of a heat exchanger according to an embodiment of the present disclosure.

In this embodiment, adjusting the amount of water injection according to the temperature of the heat exchanger includes:

s201, when the temperature of the heat exchanger is higher than or equal to a first preset temperature, spraying water to the surface of the heat exchanger in a first water spraying amount.

Along with the frosting process of the surface of the heat exchanger, the temperature of the heat exchanger is gradually reduced from the temperature higher than the first preset temperature to the first preset temperature. The water spraying amount of spraying water to the surface of the heat exchanger reaches a first water spraying amount before the temperature of the heat exchanger is reduced to a first preset temperature; when the temperature of the surface of the heat exchanger is reduced to a first preset temperature, the water spraying amount for spraying water to the surface of the heat exchanger reaches a first water spraying amount.

Optionally, the process of reducing the temperature of the heat exchanger to the first preset temperature includes a temperature reduction process and a constant temperature process. In the cooling process, the compressor can be controlled to operate at a constant frequency, and the operating frequency of the compressor can be controlled to gradually increase; during the constant temperature process, the compressor can be controlled to operate in a frequency fluctuation mode so as to maintain the temperature of the heat exchanger at the first preset temperature. Optionally, in the cooling process, the water spraying amount of spraying water to the surface of the heat exchanger reaches a first water spraying amount; or in the constant temperature process, the water spraying amount of the water sprayed to the surface of the heat exchanger reaches the first water spraying amount.

Optionally, the spraying device is controlled to intermittently spray water to the surface of the heat exchanger during the spraying of water to the surface of the heat exchanger.

Optionally, the constant temperature process is maintained for a set time, and the set time may be in a range of 0.5min to 3min, for example, the set time is 0.5min, 1min, 2min or 3 min.

And S202, spraying water to the surface of the heat exchanger in a second water spraying amount when the temperature of the heat exchanger is lower than the first preset temperature. Wherein the first amount of water sprayed is greater than the second amount of water sprayed.

The frosting process on the surface of the heat exchanger is carried out in a segmented mode, water is sprayed on the surface of the heat exchanger in a segmented mode, the accuracy of water spraying quantity is improved, and the phenomenon that the water spraying quantity is too large or the water spraying quantity is insufficient can be reduced. In the cooling process of heat exchanger, the segmentation is to heat exchanger surface water spray, frosting process for heat exchanger surface provides abundant time, before next water spray, this water spray's water spray volume can be fully frosted on heat exchanger surface, then next water of spouting, still can evenly cover the heat exchanger surface, be favorable to water evenly frosting on heat exchanger surface, when the demand frosting volume is too big (needs big water gaging), still can reduce the water yield of drippage on heat exchanger surface, reduce the cold volume of taking away on the heat exchanger because of rivers drippage, the electric energy has been practiced thrift.

If water is continuously sprayed to the surface of the heat exchanger in the frosting process of the surface of the heat exchanger, the water easily flows to the lower part of the heat exchanger, and the water temperature is continuously reduced in the flowing process of the water until frosting. In the process that water flows to the surface of the lower part of the heat exchanger from the surface of the upper part of the heat exchanger, the cold quantity of the surface of the upper part of the heat exchanger is brought to the surface of the lower part of the heat exchanger, so that the surface of the upper part of the heat exchanger is not frosted, and the surface of the lower part of the heat exchanger is frosted, so that the surface of the heat exchanger is not frosted uniformly. The method for self-cleaning the air conditioner provided by the embodiment of the disclosure can also solve the problem of uneven frosting on the surface of the heat exchanger. For example, the process of reducing the temperature of the heat exchanger to the first preset temperature only comprises a temperature reduction process, at a moment before the temperature of the heat exchanger is reduced to the first preset temperature, the water injection amount of water injected to the surface of the heat exchanger reaches the first water injection amount, so that the water in the first water injection amount on the surface of the heat exchanger can be fully frosted in the time from the moment to the moment when the temperature of the heat exchanger is reduced to the first preset temperature, the water in the second water injection amount is independently frosted when the water in the second water injection amount is injected to the surface of the heat exchanger, the frosting process of the water in the first water injection amount and the frosting process of the water in the second water injection amount are not influenced by each other, and the frosting uniformity of the surface of the heat exchanger is improved; or, the process of reducing the temperature of the heat exchanger to the first preset temperature only comprises a cooling process, when the temperature of the heat exchanger is reduced to the first preset temperature, the water spraying amount of spraying water to the surface of the heat exchanger reaches the first water spraying amount, at the moment, the spraying device sprays water to the surface of the heat exchanger intermittently, and in the time of not spraying water, the water sprayed to the surface of the heat exchanger can be fully frosted, so that segmented frosting is realized, and the frosting uniformity of the surface of the heat exchanger can be improved; or the process of reducing the temperature of the heat exchanger to the first preset temperature comprises a temperature reduction process and a constant temperature process, wherein in the temperature reduction process, the water spraying amount of spraying water to the surface of the heat exchanger reaches a first water spraying amount, in the constant temperature process, the water with the first water spraying amount on the surface of the heat exchanger can be fully frosted, when the water is sprayed to the surface of the heat exchanger with a second water spraying amount, the water with the second water spraying amount is independently frosted, the frosting process of the water with the first water spraying amount and the frosting process of the water with the second water spraying amount are not influenced mutually, and the frosting uniformity of the surface of the heat exchanger is improved; or the process of reducing the temperature of the heat exchanger to the first preset temperature comprises a cooling process and a constant temperature process, wherein in the constant temperature process, the water spraying amount of spraying water to the surface of the heat exchanger reaches a first water spraying amount, and water is intermittently sprayed to the surface of the heat exchanger so as to improve the frosting uniformity of the surface of the heat exchanger.

In some application scenarios, the first amount of water sprayed may be set to be greater than the second amount of water sprayed, which may be implemented as: the second amount of water sprayed is half of the first amount of water sprayed, or the second amount of water sprayed is greater than half of the first amount of water sprayed, or the second amount of water sprayed is less than half of the first amount of water sprayed. The amount of water injection is increased as the temperature of the heat exchanger decreases. When the temperature of the heat exchanger is higher than or equal to the first preset temperature, the temperature of the heat exchanger is higher, the frosting speed is lower, and the water flowing property sprayed on the surface of the heat exchanger is better, so that the water sprayed on the surface of the heat exchanger can flow to the position where the spraying device cannot spray, the frosted coverage area of the surface of the heat exchanger is increased, and the self-cleaning effect is improved.

In some application scenes, the type of the air conditioner is determined, the average temperature of the application environment of the air conditioner is determined, and the means for cooling the heat exchanger is also determined, so that the cooling time for the temperature of the heat exchanger to be reduced from the ambient temperature to a first preset temperature can be estimated, the first water spraying time can be determined through the water spraying mode (intermittent or continuous) and the cooling time, the first water spraying speed can be calculated through the first water spraying time and the first water spraying amount, and when the temperature of the heat exchanger is higher than or equal to the first preset temperature, water is sprayed to the surface of the heat exchanger at the first water spraying speed.

Optionally, the total amount of water sprayed onto the heat exchanger surface is positively correlated to the predetermined frosting area. The air conditioner has different use environments and different pollution conditions on the surface of the heat exchanger. When the pollution areas on the surfaces of the heat exchangers are different, the requirements on the frosting areas on the surfaces of the heat exchangers are different in the self-cleaning process of the air conditioner. For example, the set frosting area of the heat exchanger surface may be 80% to 95% of the total area, specifically, the set frosting area of the heat exchanger surface may be 80%, 85%, 90% or 95%. For the same heat exchanger, when the frosting area is set to be increased, the water injection quantity is increased to supplement the water quantity required by frosting, the water quantity generated by condensation is reduced, and the energy consumption can be reduced under the condition that the frosting area on the surface of the heat exchanger meets the requirement.

When the frosting process of the surface of the heat exchanger is carried out in two stages, the first preset temperature is positively correlated with the lowest frosting temperature, namely, the lower the lowest frosting temperature is, the lower the first preset temperature is. For example, when the minimum frosting temperature is T ℃ (T less than 0), the first preset temperature may be 1/3T, 1/2T or 2/3T. The minimum frosting temperature refers to a temperature which can meet the requirement of a frosting area and can prevent the surface of the heat exchanger from being frosted, and the temperature of the heat exchanger is kept to be greater than or equal to the minimum frosting temperature in the frosting process of the surface of the heat exchanger.

Fig. 3 is a schematic flow chart illustrating a process of adjusting the amount of water injection according to the temperature of a heat exchanger according to an embodiment of the present disclosure.

s301, when the temperature of the heat exchanger is higher than or equal to a first preset temperature, spraying water to the surface of the heat exchanger in a first water spraying amount.

Optionally, before the temperature of the heat exchanger is reduced to the first preset temperature, the water injection amount for injecting water to the surface of the heat exchanger reaches a first water injection amount; or when the temperature of the heat exchanger is reduced to the first preset temperature, the water spraying amount for spraying water to the surface of the heat exchanger reaches the first water spraying amount.

Optionally, the process of reducing the temperature of the heat exchanger to the first preset temperature includes a temperature reduction process and a constant temperature process. In the cooling process, the compressor can be controlled to operate at constant power, and the operating frequency of the compressor can be controlled to gradually increase; during the constant temperature process, the compressor can be controlled to operate in a frequency fluctuation mode so as to maintain the temperature of the heat exchanger at the first preset temperature. Optionally, in the cooling process, the water spraying amount of spraying water to the surface of the heat exchanger reaches a first water spraying amount; or in the constant temperature process, the water spraying amount of the water sprayed to the surface of the heat exchanger reaches the first water spraying amount.

And S302, spraying water to the surface of the heat exchanger at a second water spraying amount when the temperature of the heat exchanger is lower than the first preset temperature and higher than the second preset temperature.

Optionally, before the temperature of the heat exchanger is reduced to the second preset temperature, the water injection amount to the surface of the heat exchanger reaches a first water injection amount; or when the temperature of the heat exchanger is reduced to a second preset temperature, the water spraying amount for spraying water to the surface of the heat exchanger reaches a second water spraying amount.

Optionally, the process of reducing the temperature of the heat exchanger to the second preset temperature includes a cooling process and a constant temperature process, and in the cooling process, the compressor can be controlled to operate at constant power, and the operating frequency of the compressor can be controlled to gradually increase; during the constant temperature process, the compressor can be controlled to operate in a frequency fluctuation mode to maintain the temperature of the heat exchanger at the second preset temperature. Optionally, in the cooling process, the water spraying amount of spraying water to the surface of the heat exchanger reaches a second water spraying amount; or the water spraying amount of the water sprayed to the surface of the heat exchanger reaches the second water spraying amount in the constant temperature process.

And S303, spraying water to the surface of the heat exchanger in a third water spraying amount when the temperature of the heat exchanger is lower than or equal to a second preset temperature. Wherein the third water injection amount is less than or equal to the second water injection amount.

The frosting process of the surface of the heat exchanger is carried out in a segmented mode, water is sprayed to the surface of the heat exchanger in a segmented mode, the accuracy of water spraying quantity is further improved, and the phenomenon that the water spraying quantity is too large or insufficient is further reduced.

In the cooling process of heat exchanger, the segmentation is to heat exchanger surface water spray, frosting process for heat exchanger surface provides abundant time, before next water spray, the water spray volume of this water spray can be fully frosted on heat exchanger surface, then the water of next time spraying, still can evenly cover the heat exchanger surface, be favorable to water evenly frosting on heat exchanger surface, when the demand frosting volume is too big (needs big water gaging), still can reduce the water yield of drippage on heat exchanger surface, reduce the cold volume of taking away on the heat exchanger because of rivers drippage, the electric energy has been practiced thrift.

If water is continuously sprayed to the surface of the heat exchanger in the frosting process of the surface of the heat exchanger, the water easily flows to the lower part of the heat exchanger, and the water temperature is continuously reduced in the flowing process of the water until frosting. In the process that water flows to the surface of the lower part of the heat exchanger from the surface of the upper part of the heat exchanger, the cold quantity of the surface of the upper part of the heat exchanger is brought to the surface of the lower part of the heat exchanger, so that the surface of the upper part of the heat exchanger is not frosted, and the surface of the lower part of the heat exchanger is frosted, so that the surface of the heat exchanger is not frosted uniformly. The method for self-cleaning the air conditioner provided by the embodiment of the disclosure can also solve the problem of uneven frosting on the surface of the heat exchanger. For example, the process of reducing the temperature of the heat exchanger to the first preset temperature only comprises a temperature reduction process, at a moment before the temperature of the heat exchanger is reduced to the first preset temperature, the water injection amount of water injected to the surface of the heat exchanger reaches the first water injection amount, so that the water in the first water injection amount on the surface of the heat exchanger can be fully frosted in the time from the moment to the moment when the temperature of the heat exchanger is reduced to the first preset temperature, the water in the second water injection amount is independently frosted when the water in the second water injection amount is injected to the surface of the heat exchanger, the frosting process of the water in the first water injection amount and the frosting process of the water in the second water injection amount are not influenced by each other, and the frosting uniformity of the surface of the heat exchanger is improved; or, the process of reducing the temperature of the heat exchanger to the first preset temperature only comprises a cooling process, when the temperature of the heat exchanger is reduced to the first preset temperature, the water spraying amount of spraying water to the surface of the heat exchanger reaches the first water spraying amount, and at the moment, the spraying device intermittently sprays water to the surface of the heat exchanger, so that the frosting uniformity of the surface of the heat exchanger can also be improved; or the process of reducing the temperature of the heat exchanger to the first preset temperature comprises a temperature reduction process and a constant temperature process, wherein in the temperature reduction process, the water spraying amount of spraying water to the surface of the heat exchanger reaches a first water spraying amount, in the constant temperature process, the water with the first water spraying amount on the surface of the heat exchanger can be fully frosted, when the water is sprayed to the surface of the heat exchanger with a second water spraying amount, the water with the second water spraying amount is independently frosted, the frosting process of the water with the first water spraying amount and the frosting process of the water with the second water spraying amount are not influenced mutually, and the frosting uniformity of the surface of the heat exchanger is improved; or the process of reducing the temperature of the heat exchanger to the first preset temperature comprises a cooling process and a constant temperature process, wherein in the constant temperature process, the water spraying amount of spraying water to the surface of the heat exchanger reaches a first water spraying amount, and water is intermittently sprayed to the surface of the heat exchanger so as to improve the frosting uniformity of the surface of the heat exchanger. Based on the same process, before the third water injection amount is sprayed to the surface of the heat exchanger, the water with the second water injection amount is fully frosted on the surface of the heat exchanger, the frosting process of the water with the third water injection amount and the frosting process of the water with the second water injection amount are not affected with each other, and the frosting uniformity of the surface of the heat exchanger is improved.

In some application scenarios, the first amount of water sprayed may be set to be greater than the second amount of water sprayed, which is greater than the third amount of water sprayed; alternatively, the first water injection amount can be set to be larger than the second water injection amount, and the second water injection amount is equal to the third water injection amount; alternatively, the second water spraying amount can be set to be half of the first water spraying amount, and the third water spraying amount is larger than the second water spraying amount; or the second water spraying amount is half of the first water spraying amount, and the third water spraying amount is equal to the second water spraying amount; alternatively, the first amount of water injection may be set greater than the second amount of water injection, which is greater than the third amount of water injection, and the first amount of water injection is half of the total amount of water injection to the heat exchanger surface.

In some application scenes, the type of the air conditioner is determined, the average temperature of the application environment of the air conditioner is determined, the means for cooling the heat exchanger is also determined, the cooling time for reducing the temperature of the heat exchanger from the ambient temperature to a first preset temperature can be estimated, the first water spraying time can be determined through the water spraying mode (intermittent or continuous) and the cooling time, the first water spraying speed can be calculated through the first water spraying time and the first water spraying amount, and when the temperature of the heat exchanger is higher than or equal to the first preset temperature, the spraying device is controlled to spray water to the surface of the heat exchanger according to the first water spraying speed. And when the temperature of the heat exchanger is lower than the first preset temperature and higher than or equal to the second preset temperature, the spraying device is controlled to spray water to the surface of the heat exchanger at the second water spraying speed.

When the frosting process of the surface of the heat exchanger with the first preset temperature and the second preset temperature is carried out in three stages, the first preset temperature is positively correlated with the lowest frosting temperature, or the second preset temperature is positively correlated with the lowest frosting temperature, or the first preset temperature and the second preset temperature are both positively correlated with the lowest frosting temperature. For example, when the minimum frosting temperature is T ℃ (T is greater than 0), the first preset temperature may be 1/3T, 1/2T or 2/3T, or the second preset temperature may be 1/3T, 1/2T or 2/3T, or the first preset temperature is 1/3T and the first preset temperature is 1/2T or 2/3T, or the first preset temperature is 1/2T and the second preset temperature is 2/3T. During frosting of the heat exchanger surfaces, the temperature of the heat exchanger is maintained at or above the minimum frosting temperature.

Fig. 4 is a schematic flow chart of a method for self-cleaning of an air conditioner according to an embodiment of the present disclosure.

In this embodiment, a method for air conditioning self-cleaning, includes:

s401, after the air conditioner enters a self-cleaning mode, the temperature of the heat exchanger is reduced.

S402, spraying water to the surface of the heat exchanger in the cooling process of the heat exchanger, and adjusting the water spraying amount according to the running frequency of the compressor.

When water is sprayed to the surface of the heat exchanger, water flow can attach to the surface of the heat exchanger, and the water attached to the surface of the heat exchanger can frost in the process of reducing the temperature of the heat exchanger. The water on the surface of the heat exchanger can also come from the water vapor in the air, when the temperature of the heat exchanger is lower, the water vapor in the air can generate condensation on the surface of the heat exchanger, and in the process, the water condensation releases heat and consumes electric energy. In the embodiment of the disclosure, the water required by the frosting on the surface of the heat exchanger is not only from the condensation, but also from the water sprayed on the surface of the heat exchanger, so that the electric energy required by the condensation process on the surface of the heat exchanger is reduced, and the energy is saved. Furthermore, after the air conditioner enters the self-cleaning mode, the water spraying amount is adjusted according to the running frequency of the compressor, so that the accuracy of the water spraying amount of the water sprayed to the surface of the heat exchanger can be improved, and the phenomenon of excessive or insufficient water spraying amount is reduced.

Fig. 5 is a schematic flow chart illustrating a process of adjusting the amount of water injection according to the operating frequency of the compressor according to an embodiment of the present disclosure.

In this embodiment, adjusting the amount of water injection based on the operating frequency of the compressor includes:

s501, after the compressor starts to operate at a first preset frequency, water is sprayed to the surface of the heat exchanger at a first water spraying amount.

In some application scenes, the type of the air conditioner is determined, the operating frequency of the compressor and the change speed of the temperature of the heat exchanger have a corresponding relation, the operating frequency of the compressor and the temperature of the heat exchanger can reach the corresponding relation, and the temperature of the heat exchanger can be adjusted by adjusting the operating frequency of the compressor.

Optionally, after the compressor is operated at the first preset frequency, the temperature of the heat exchanger may be decreased to a first preset temperature.

Optionally, after the compressor operates at the first preset frequency, the method includes: the compressor is always operated at a first preset frequency until the temperature of the heat exchanger is reduced to a first preset temperature. Optionally, during the operation of the compressor at the first preset frequency, the water injection amount for injecting water to the surface of the heat exchanger reaches a first water injection amount; or when the compressor finishes operating at the first preset frequency, the water injection amount for injecting water to the surface of the heat exchanger reaches the first water injection amount.

Optionally, after the compressor starts to operate at the first preset frequency, the method includes: the compressor firstly runs at a first preset frequency, so that the temperature of the heat exchanger is reduced to a first preset temperature, and then the compressor runs in a frequency fluctuation mode, so that the heat exchanger maintains the first preset temperature. Optionally, during the operation of the compressor at the first preset frequency, the water injection amount for injecting water to the surface of the heat exchanger reaches a first water injection amount; alternatively, the amount of water sprayed onto the heat exchanger surface reaches the first amount of water sprayed during operation of the compressor in a frequency-fluctuating manner.

Optionally, the time during which the compressor is operated in a frequency fluctuating manner lasts for a set time, which may be in the range of 0.5min to 3min, for example, 0.5min, 1min, 2min or 3 min.

And S502, spraying water to the surface of the heat exchanger at a second water spraying amount after the compressor starts to operate at a second preset frequency. The first preset frequency is less than the second preset frequency, and the first water spraying amount is greater than or equal to the second water spraying amount.

The frosting process on the surface of the heat exchanger is carried out in sections, and water is sprayed on the surface of the heat exchanger in sections, so that the accuracy of the water spraying amount is improved, and the phenomenon of insufficient water spraying amount or excessive water spraying amount can be reduced. In the cooling process of heat exchanger, the segmentation is to heat exchanger surface water spray, frosting process for heat exchanger surface provides abundant time, before next water spray, this water spray's water spray volume can be fully frosted on heat exchanger surface, then next water of spouting, still can evenly cover the heat exchanger surface, be favorable to water evenly frosting on heat exchanger surface, when the demand frosting volume is too big (needs big water gaging), still can reduce the water yield of drippage on heat exchanger surface, reduce the cold volume of taking away on the heat exchanger because of rivers drippage, the electric energy has been practiced thrift.

If water is continuously sprayed to the surface of the heat exchanger in the frosting process of the surface of the heat exchanger, the water easily flows to the lower part of the heat exchanger, and the water temperature is continuously reduced in the flowing process of the water until frosting. In the process that water flows to the surface of the lower part of the heat exchanger from the surface of the upper part of the heat exchanger, the cold quantity of the surface of the upper part of the heat exchanger is brought to the surface of the lower part of the heat exchanger, so that the surface of the upper part of the heat exchanger is not frosted, and the surface of the lower part of the heat exchanger is frosted, so that the surface of the heat exchanger is not frosted uniformly. The method for self-cleaning the air conditioner provided by the embodiment of the disclosure can also solve the problem of uneven frosting on the surface of the heat exchanger. For example, the compressor is operated at a first preset frequency, before the temperature of the heat exchanger reaches a first preset temperature, the water spraying amount for spraying water to the surface of the heat exchanger reaches a first water spraying amount, the water at the first water spraying amount on the surface of the heat exchanger can be fully frosted in the time from the moment to the time when the temperature of the heat exchanger is reduced to the first preset temperature, the water at the second water spraying amount is independently frosted when the water at the second water spraying amount is sprayed to the surface of the heat exchanger, the frosting process of the water at the first water spraying amount and the frosting process of the water at the second water spraying amount are not influenced mutually, and the frosting uniformity of the surface of the heat exchanger is improved; or the spraying device is controlled to intermittently spray water to the surface of the heat exchanger, when the temperature of the heat exchanger reaches a first preset temperature, the water spraying amount of the water sprayed to the surface of the heat exchanger reaches a first water spraying amount, and the intermittent water spraying provides time for the frosting process of the surface water of the heat exchanger, so that sectional frosting is facilitated, and the frosting uniformity of the surface of the heat exchanger is improved; or, the compressor operates at a first preset frequency and then operates in a frequency fluctuation mode, the water spraying amount of water sprayed to the surface of the heat exchanger reaches a first water spraying amount in the process that the compressor operates at the first preset frequency, time is provided for the frosting process of water on the surface of the heat exchanger in the process that the compressor operates in the frequency fluctuation mode, the water at the first water spraying amount on the surface of the heat exchanger can be fully frosted, the water at the second water spraying amount can be independently frosted when the water at the second water spraying amount is sprayed to the surface of the heat exchanger, the frosting process of the water at the first water spraying amount and the frosting process of the water at the second water spraying amount are not influenced by each other, and the frosting uniformity of the surface of the heat exchanger is improved; or, the spraying device is controlled to intermittently spray water to the surface of the heat exchanger, the water spraying amount of the water sprayed to the surface of the heat exchanger reaches a first water spraying amount in the process that the compressor runs in a frequency fluctuation mode, and the intermittent water spraying provides time for the frosting process of the surface water of the heat exchanger, so that sectional frosting is facilitated, and the frosting uniformity of the surface of the heat exchanger is improved.

In some application scenarios, the first amount of water sprayed may be set to be greater than the second amount of water sprayed, which may be implemented as: the second amount of water sprayed is half of the first amount of water sprayed, or the second amount of water sprayed is greater than half of the first amount of water sprayed, or the second amount of water sprayed is less than half of the first amount of water sprayed. The temperature of the heat exchanger shows a decreasing trend as the compressor is operated, and the amount of water injection is increased as the temperature of the heat exchanger decreases. When the compressor runs at a first preset frequency, the temperature of the heat exchanger is greater than or equal to the first preset temperature, the temperature of the heat exchanger is high, the frosting speed is low, the water flowing property sprayed on the surface of the heat exchanger is good, so that the water sprayed on the surface of the heat exchanger can flow to the position where the spraying device cannot spray, the frosted coverage area of the surface of the heat exchanger is increased, and the self-cleaning effect is improved.

In some application scenarios, the operation frequency of the compressor is preset, for example, the compressor is operated at a first preset frequency and then operated in a frequency fluctuation manner within a first preset time, and after the first preset time, the compressor is operated at a second preset frequency and then operated in a frequency fluctuation manner. The water spraying time can be determined through the water spraying mode (intermittent or continuous) and the first preset time, and then the first water spraying speed can be calculated through the water spraying time and the first water spraying amount. And after the compressor runs at a first preset frequency, spraying water to the surface of the heat exchanger at a first water spraying speed.

In some application scenarios, the operation frequency of the compressor is preset, for example, the compressor is operated at the second preset frequency first within the second preset time, and then operated in a frequency fluctuation manner, and after the second preset time, the compressor is operated at the third preset frequency. The water spraying time can be determined through the water spraying mode (intermittent or continuous) and the second preset time, and then the second water spraying speed can be calculated through the water spraying time and the second water spraying amount. And after the compressor runs at a second preset frequency, spraying water to the surface of the heat exchanger at a second water spraying speed.

Optionally, the first preset frequency is smaller than the maximum allowable frequency, and the second preset frequency is smaller than or equal to the maximum allowable frequency. When the compressor is operated at the maximum allowable frequency, the heat exchanger may reach a minimum temperature, for example, the minimum temperature may be the minimum frosting temperature in the foregoing embodiment, at which the frosting area of the surface of the heat exchanger reaches the preset frosting area, and the surface of the heat exchanger does not freeze. Optionally, the first preset frequency is half of the second preset frequency.

FIG. 6 is a schematic flow chart illustrating the adjustment of water injection amount according to the frequency of the compressor according to an embodiment of the present disclosure.

and S601, after the compressor starts to operate at a first preset frequency, spraying water to the surface of the heat exchanger at a first water spraying amount.

Optionally, after the compressor operates at the first preset frequency, the method includes: the compressor is always operated at a first preset frequency until the temperature of the heat exchanger is reduced to a first preset temperature. Optionally, when the compressor operates at a first preset frequency, the water injection amount for injecting water to the surface of the heat exchanger reaches a first water injection amount; or when the compressor finishes operating at the first preset frequency, the water injection amount for injecting water to the surface of the heat exchanger reaches the first water injection amount.

And S602, after the compressor starts to operate at a second preset frequency, spraying water to the surface of the heat exchanger at a second water spraying amount.

Optionally, after the compressor is operated at the second predetermined frequency, the temperature of the heat exchanger may be decreased to a second predetermined temperature.

Optionally, after the compressor operates at the second preset frequency, the method includes: the compressor is always operated at a second preset frequency until the temperature of the heat exchanger is reduced to a second preset temperature. Optionally, the amount of water sprayed onto the surface of the heat exchanger reaches a second amount of water sprayed before the temperature of the heat exchanger will decrease to a second preset temperature; or when the temperature of the heat exchanger is reduced to a second preset temperature, the water spraying amount for spraying water to the surface of the heat exchanger reaches a second water spraying amount.

Optionally, after the compressor operates at the second frequency, the method includes: the compressor firstly runs at a second preset frequency, so that the temperature of the heat exchanger is reduced to a second preset temperature, and then the compressor runs in a frequency fluctuation mode, so that the heat exchanger maintains the second preset temperature. Optionally, during the operation of the compressor at the second preset frequency, the water injection amount for injecting water to the surface of the heat exchanger reaches a second water injection amount; alternatively, the amount of water sprayed onto the heat exchanger surface reaches the second amount of water sprayed during operation of the compressor in a frequency fluctuating manner.

And S603, after the compressor starts to operate at a third preset frequency, spraying water to the surface of the heat exchanger at a third water spraying amount. Wherein, the third preset frequency is greater than the second preset frequency, and the third water spraying amount is less than or equal to the second water spraying amount.

If water is continuously sprayed to the surface of the heat exchanger in the frosting process of the surface of the heat exchanger, the water easily flows to the lower part of the heat exchanger, and the water temperature is continuously reduced in the flowing process of the water until frosting. In the process that water flows to the surface of the lower part of the heat exchanger from the surface of the upper part of the heat exchanger, the cold quantity of the surface of the upper part of the heat exchanger is brought to the surface of the lower part of the heat exchanger, so that the surface of the upper part of the heat exchanger is not frosted, and the surface of the lower part of the heat exchanger is frosted, so that the surface of the heat exchanger is not frosted uniformly. The method for self-cleaning the air conditioner provided by the embodiment of the disclosure can also solve the problem of uneven frosting on the surface of the heat exchanger. For example, the compressor is operated at a first preset frequency, before the temperature of the heat exchanger reaches a first preset temperature, the water spraying amount for spraying water to the surface of the heat exchanger reaches a first water spraying amount, the water at the first water spraying amount on the surface of the heat exchanger can be fully frosted in the time from the moment to the time when the temperature of the heat exchanger is reduced to the first preset temperature, the water at the second water spraying amount is independently frosted when the water at the second water spraying amount is sprayed to the surface of the heat exchanger, the frosting process of the water at the first water spraying amount and the frosting process of the water at the second water spraying amount are not influenced mutually, and the frosting uniformity of the surface of the heat exchanger is improved; or the spraying device is controlled to intermittently spray water to the surface of the heat exchanger, when the temperature of the heat exchanger reaches a first preset temperature, the water spraying amount of the water sprayed to the surface of the heat exchanger reaches a first water spraying amount, and the intermittent water spraying provides time for the frosting process of the surface water of the heat exchanger, so that sectional frosting is facilitated, and the frosting uniformity of the surface of the heat exchanger is improved; or, the compressor operates at a first preset frequency and then operates in a frequency fluctuation mode, the water spraying amount of water sprayed to the surface of the heat exchanger reaches a first water spraying amount in the process that the compressor operates at the first preset frequency, time is provided for the frosting process of water on the surface of the heat exchanger in the process that the compressor operates in the frequency fluctuation mode, the water at the first water spraying amount on the surface of the heat exchanger can be fully frosted, the water at the second water spraying amount can be independently frosted when the water at the second water spraying amount is sprayed to the surface of the heat exchanger, the frosting process of the water at the first water spraying amount and the frosting process of the water at the second water spraying amount are not influenced by each other, and the frosting uniformity of the surface of the heat exchanger is improved; or, the spraying device is controlled to intermittently spray water to the surface of the heat exchanger, the water spraying amount of the water sprayed to the surface of the heat exchanger reaches a first water spraying amount in the process that the compressor runs in a frequency fluctuation mode, and the intermittent water spraying provides time for the frosting process of the surface water of the heat exchanger, so that sectional frosting is facilitated, and the frosting uniformity of the surface of the heat exchanger is improved. Based on the same process, before the third water injection amount is sprayed to the surface of the heat exchanger, the water with the second water injection amount is fully frosted on the surface of the heat exchanger, the frosting process of the water with the third water injection amount and the frosting process of the water with the second water injection amount are not affected with each other, and the frosting uniformity of the surface of the heat exchanger is improved.

Optionally, the first preset frequency is less than the maximum allowable frequency, the second preset frequency is less than the maximum allowable frequency, and the third preset frequency is less than or equal to the maximum allowable frequency. When the compressor is operated at the maximum allowable frequency, the heat exchanger can reach a minimum temperature, such as the minimum frosting temperature in the previous embodiment, at which the frosting area of the surface of the heat exchanger can reach a preset frosting area, and the surface of the heat exchanger is not frozen. Optionally, the first preset frequency is half of the first preset frequency, or the third preset frequency is the maximum allowable frequency, or the second preset frequency is half of the second preset frequency and the third preset frequency is the maximum allowable frequency.

Fig. 7 is a schematic flowchart of a method for self-cleaning of an air conditioner according to an embodiment of the disclosure.

In this embodiment, a method for air conditioning self-cleaning, includes:

s701, reducing the temperature of the heat exchanger after the air conditioner enters a self-cleaning mode.

S702, spraying water to the surface of the heat exchanger in the cooling process of the heat exchanger, and adjusting the water spraying amount according to the cooling time.

When water is sprayed to the surface of the heat exchanger, water flow can attach to the surface of the heat exchanger, and the water attached to the surface of the heat exchanger can frost in the process of reducing the temperature of the heat exchanger. The water on the surface of the heat exchanger can also come from the water vapor in the air, when the temperature of the heat exchanger is lower, the water vapor in the air can generate condensation on the surface of the heat exchanger, and in the process, the water condensation releases heat and consumes electric energy. In the embodiment of the disclosure, the water required by the frosting on the surface of the heat exchanger is not only from the condensation, but also from the water sprayed on the surface of the heat exchanger, so that the electric energy required by the condensation process on the surface of the heat exchanger is reduced, and the energy is saved. Furthermore, after the air conditioner enters the self-cleaning mode, the water spraying amount is adjusted according to the cooling time of the heat exchanger, the accuracy of the water spraying amount of the water sprayed to the surface of the heat exchanger can be improved, and the phenomenon that the water spraying amount is too much or not enough is reduced.

Fig. 8 is a schematic flow chart illustrating a process of adjusting the amount of water sprayed according to the cooling time according to an embodiment of the disclosure.

In this embodiment, adjusting the amount of water sprayed according to the cool down time includes:

s801, spraying water to the surface of the heat exchanger in a first water spraying amount when the temperature reduction time is less than or equal to a first preset time.

In some application scenarios, the frosting process on the surface of the heat exchanger is preset, for example, the compressor is controlled to operate at a first preset frequency within a first preset time to reduce the temperature of the heat exchanger to a first preset temperature, and after the first preset time, the compressor is controlled to operate at a second preset frequency to reduce the temperature of the heat exchanger to a second preset temperature.

Optionally, when the cooling time is less than the first preset time, the temperature of the heat exchanger is continuously reduced, and when the cooling time is equal to the first preset time, the temperature of the heat exchanger is reduced to the first preset temperature. Optionally, when the cooling time is less than a first preset time, the water spraying amount of spraying water to the surface of the heat exchanger reaches a first water spraying amount; or when the temperature reduction time is equal to the first preset time, the water spraying amount of spraying water to the surface of the heat exchanger reaches the first water spraying amount.

Optionally, when the cooling time reaches the first preset time, the heat exchanger is cooled to the first preset temperature and is maintained at the first preset temperature for a period of time. For example, the first preset time includes a first cool-down time period and a first constant-temperature time period. In the first cooling time period, the temperature of the heat exchanger can be reduced to a first preset temperature, and in the first constant temperature time period, the heat exchanger maintains the first preset temperature. Optionally, in the first cooling period, the water injection amount of the water injected to the surface of the heat exchanger reaches a first water injection amount; or in the first cooling time period, the water spraying amount of spraying water to the surface of the heat exchanger reaches the first water spraying amount.

Optionally, the first constant temperature time period setting time may be 0.5min to 3min, for example, the first constant temperature time period is 0.5min, 1min, 2min or 3 min.

And S802, spraying water to the surface of the heat exchanger by using a second water spraying amount when the temperature reduction time is longer than the first preset time. Wherein the first water injection amount is greater than or equal to the second water injection amount.

If water is continuously sprayed to the surface of the heat exchanger in the frosting process of the surface of the heat exchanger, the water easily flows to the lower part of the heat exchanger, and the water temperature is continuously reduced in the flowing process of the water until frosting. In the process that water flows to the surface of the lower part of the heat exchanger from the surface of the upper part of the heat exchanger, the cold quantity of the surface of the upper part of the heat exchanger is brought to the surface of the lower part of the heat exchanger, so that the surface of the upper part of the heat exchanger is not frosted, and the surface of the lower part of the heat exchanger is frosted, so that the surface of the heat exchanger is not frosted uniformly. The method for self-cleaning the air conditioner provided by the embodiment of the disclosure can also solve the problem of uneven frosting on the surface of the heat exchanger. For example, when the temperature reduction time is less than a first preset time, the temperature of the heat exchanger is continuously reduced, when the temperature reduction time is equal to the first preset time, the temperature of the heat exchanger is reduced to the first preset temperature, when the temperature reduction time is less than the first preset time, the water spraying amount of the water sprayed to the surface of the heat exchanger reaches a first water spraying amount, and in a time period from the time when the water spraying amount of the water sprayed to the surface of the heat exchanger reaches the first water spraying amount to the first preset time, the water with the first water spraying amount on the surface of the heat exchanger can be fully frosted, when the water is sprayed to the surface of the heat exchanger with a second water spraying amount, the water with the second water spraying amount is independently frosted, the frosting process of the water with the first water spraying amount and the frosting process of the water with the second water spraying amount do not affect each other, and the frosting uniformity of the surface of the heat exchanger is improved; or when the cooling time is less than the first preset time, the temperature of the heat exchanger is continuously reduced, when the cooling time is equal to the first preset time, the temperature of the heat exchanger is reduced to the first preset temperature, the spraying device intermittently sprays water to the surface of the heat exchanger, when the cooling time is equal to the first preset time, the water spraying amount of the water sprayed to the surface of the heat exchanger reaches the first water spraying amount, and in the time of not spraying water, the water sprayed to the surface of the heat exchanger can be fully frosted, so that segmented frosting is realized, and the frosting uniformity of the surface of the heat exchanger can be improved; or the first preset time comprises a first cooling time period and a first constant temperature time period, in the first cooling time period, the water spraying amount of the water sprayed to the surface of the heat exchanger reaches a first water spraying amount, the water with the first water spraying amount can be fully frosted in the first constant temperature time period, when the water is sprayed to the surface of the heat exchanger with a second water spraying amount, the water with the second water spraying amount is independently frosted, the frosting process of the water with the first water spraying amount and the frosting process of the water with the second water spraying amount are not influenced mutually, and the frosting uniformity of the surface of the heat exchanger is improved; or the process of reducing the temperature of the heat exchanger to the first preset temperature comprises a cooling process and a constant temperature process, wherein in the constant temperature process, the water spraying amount of spraying water to the surface of the heat exchanger reaches a first water spraying amount, and water is intermittently sprayed to the surface of the heat exchanger so as to improve the frosting uniformity of the surface of the heat exchanger.

In some application scenarios, the first amount of water sprayed may be set to be greater than the second amount of water sprayed, which may be implemented as: the second amount of water sprayed is half of the first amount of water sprayed, or the second amount of water sprayed is greater than half of the first amount of water sprayed, or the second amount of water sprayed is less than half of the first amount of water sprayed. The amount of water injection is increased as the temperature of the heat exchanger decreases. When the cooling time is less than or equal to the first preset time, the temperature of the heat exchanger is greater than or equal to the first preset temperature, the temperature of the heat exchanger is high, the frosting speed is low, the water flowing property sprayed on the surface of the heat exchanger is good, so that the water sprayed on the surface of the heat exchanger can flow to the position where the spraying device cannot spray, the frosted coverage area of the surface of the heat exchanger is increased, and the self-cleaning effect is improved.

In some application scenarios, the water spraying manner (intermittent or continuous) for spraying water to the surface of the heat exchanger is preset, the time for the water spraying amount for spraying water to the surface of the heat exchanger to reach the first water spraying amount is also preset, and the first water spraying speed can be calculated according to the first water spraying amount, the water spraying manner and the time for the water spraying amount for spraying water to the surface of the heat exchanger to reach the first water spraying amount. And when the temperature reduction time is less than or equal to a first preset time, spraying water to the surface of the heat exchanger at a first water spraying speed.

Fig. 9 is a schematic flow chart illustrating a process of adjusting the amount of water sprayed according to the cooling time according to an embodiment of the disclosure.

and S901, spraying water to the surface of the heat exchanger at a first water spraying amount when the temperature reduction time is less than or equal to a first preset time.

And S902, spraying water to the surface of the heat exchanger by a second water spraying amount when the temperature reduction time is longer than the first preset time and shorter than the second preset time.

Optionally, when the cooling time is longer than the first preset time and shorter than the second preset time, the temperature of the heat exchanger is continuously reduced, and when the cooling time is equal to the second preset time, the temperature of the heat exchanger is reduced to the second preset temperature. Optionally, when the cooling time is longer than a first preset time and shorter than a second preset time, the water spraying amount of spraying water to the surface of the heat exchanger reaches a first water spraying amount; or when the temperature reduction time is equal to the second preset time, the water spraying amount of spraying water to the surface of the heat exchanger reaches the first water spraying amount.

Optionally, when the cooling time reaches a second preset time, the heat exchanger is cooled to a second preset temperature and is maintained at the second preset temperature for a period of time. For example, the first preset time to the second preset time includes a second cooling time period and a second constant temperature time period. And in the second cooling time period, the temperature of the heat exchanger can be reduced to a second preset temperature, and in the second constant temperature time period, the heat exchanger maintains the second preset temperature. Optionally, in a second cooling period, the water injection amount of the water injected to the surface of the heat exchanger reaches a second water injection amount; or in the second temperature reduction period, the water spraying amount of the water sprayed to the surface of the heat exchanger reaches the second water spraying amount.

Optionally, the second constant temperature time period setting time may be 0.5min to 3min, for example, the second constant temperature time period is 0.5min, 1min, 2min or 3 min.

And S903, spraying water to the surface of the heat exchanger at a third water spraying amount when the temperature reduction time is more than or equal to a second preset time. Wherein the third water injection amount is less than or equal to the second water injection amount.

If water is continuously sprayed to the surface of the heat exchanger in the frosting process of the surface of the heat exchanger, the water easily flows to the lower part of the heat exchanger, and the water temperature is continuously reduced in the flowing process of the water until frosting. In the process that water flows to the surface of the lower part of the heat exchanger from the surface of the upper part of the heat exchanger, the cold quantity of the surface of the upper part of the heat exchanger is brought to the surface of the lower part of the heat exchanger, so that the surface of the upper part of the heat exchanger is not frosted, and the surface of the lower part of the heat exchanger is frosted, so that the surface of the heat exchanger is not frosted uniformly. The method for self-cleaning the air conditioner provided by the embodiment of the disclosure can also solve the problem of uneven frosting on the surface of the heat exchanger. For example, when the temperature reduction time is less than a first preset time, the temperature of the heat exchanger is continuously reduced, when the temperature reduction time is equal to the first preset time, the temperature of the heat exchanger is reduced to the first preset temperature, when the temperature reduction time is less than the first preset time, the water spraying amount of the water sprayed to the surface of the heat exchanger reaches a first water spraying amount, and in a time period from the time when the water spraying amount of the water sprayed to the surface of the heat exchanger reaches the first water spraying amount to the first preset time, the water with the first water spraying amount on the surface of the heat exchanger can be fully frosted, when the water is sprayed to the surface of the heat exchanger with a second water spraying amount, the water with the second water spraying amount is independently frosted, the frosting process of the water with the first water spraying amount and the frosting process of the water with the second water spraying amount do not affect each other, and the frosting uniformity of the surface of the heat exchanger is improved; or when the cooling time is less than the first preset time, the temperature of the heat exchanger is continuously reduced, when the cooling time is equal to the first preset time, the temperature of the heat exchanger is reduced to the first preset temperature, the spraying device intermittently sprays water to the surface of the heat exchanger, when the cooling time is equal to the first preset time, the water spraying amount of the water sprayed to the surface of the heat exchanger reaches the first water spraying amount, and in the time of not spraying water, the water sprayed to the surface of the heat exchanger can be fully frosted, so that segmented frosting is realized, and the frosting uniformity of the surface of the heat exchanger can be improved; or the first preset time comprises a first cooling time period and a first constant temperature time period, in the first cooling time period, the water spraying amount of the water sprayed to the surface of the heat exchanger reaches a first water spraying amount, the water with the first water spraying amount can be fully frosted in the first constant temperature time period, when the water is sprayed to the surface of the heat exchanger with a second water spraying amount, the water with the second water spraying amount is independently frosted, the frosting process of the water with the first water spraying amount and the frosting process of the water with the second water spraying amount are not influenced mutually, and the frosting uniformity of the surface of the heat exchanger is improved; or the process of reducing the temperature of the heat exchanger to the first preset temperature comprises a cooling process and a constant temperature process, wherein in the constant temperature process, the water spraying amount of spraying water to the surface of the heat exchanger reaches a first water spraying amount, and water is intermittently sprayed to the surface of the heat exchanger so as to improve the frosting uniformity of the surface of the heat exchanger. Based on the same process, before the third water injection amount is sprayed to the surface of the heat exchanger, the water with the second water injection amount is fully frosted on the surface of the heat exchanger, the frosting process of the water with the third water injection amount and the frosting process of the water with the second water injection amount are not affected with each other, and the frosting uniformity of the surface of the heat exchanger is improved.

In some application scenarios, the water spraying manner (intermittent or continuous) for spraying water to the surface of the heat exchanger is preset, the time for the water spraying amount for spraying water to the surface of the heat exchanger to reach the second water spraying amount is also preset, and the second water spraying speed can be calculated by the second water spraying amount, the water spraying manner and the time for the water spraying amount for spraying water to the surface of the heat exchanger to reach the second water spraying amount. And when the cooling time is longer than the first preset time and shorter than the second preset time, spraying water to the surface of the heat exchanger at a second water spraying speed.

Optionally, when the heat exchanger maintains the first preset temperature, the first preset temperature is positively correlated with the lowest frosting temperature, and when the heat exchanger maintains the second preset temperature, the second preset temperature is positively correlated with the lowest frosting temperature.

The embodiment of the disclosure provides a device for self-cleaning of an air conditioner.

In this embodiment, the apparatus for air conditioning self-cleaning includes:

a processor (processor)101 and a memory (memory)102, and may further include a Communication Interface 103 and a bus 104. The processor 101, the communication interface 103, and the memory 102 may communicate with each other via the bus 104. The communication interface 103 may be used for information transfer. The processor 101 may call logic instructions in the memory 102 to perform the method for air conditioner self-cleaning provided by the above-described embodiments.

Furthermore, the logic instructions in the memory 102 may be implemented in software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products.

The memory 102 is a computer-readable storage medium, and can be used for storing software programs, computer-executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 101 executes the functional application and data processing by executing the software program, instructions and modules stored in the memory 102, that is, implements the method in the above-described method embodiments.

The memory 102 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal device, and the like. Further, the memory 102 may include high speed random access memory and may also include non-volatile memory.

The embodiment of the disclosure provides an air conditioner, which comprises the self-cleaning device for the air conditioner provided by the embodiment.

The embodiment of the disclosure provides a computer-readable storage medium storing computer-executable instructions configured to perform the method for self-cleaning of an air conditioner provided by the above-mentioned embodiment.

The disclosed embodiments provide a computer program product comprising a computer program stored on a computer-readable storage medium, the computer program comprising program instructions that, when executed by a computer, cause the computer to perform the method for air conditioner self-cleaning provided by the above-mentioned embodiments.

The computer-readable storage medium described above may be a transitory computer-readable storage medium or a non-transitory computer-readable storage medium.

The technical solution of the embodiments of the present disclosure may be embodied in the form of a software product, where the computer software product is stored in a storage medium and includes one or more instructions to enable a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method in the embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium comprising: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes, and may also be a transient storage medium.

The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The scope of the disclosed embodiments includes the full ambit of the claims, as well as all available equivalents of the claims. As used in this application, although the terms "first," "second," etc. may be used in this application to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, unless the meaning of the description changes, so long as all occurrences of the "first element" are renamed consistently and all occurrences of the "second element" are renamed consistently. The first and second elements are both elements, but may not be the same element. Furthermore, the words used in the specification are words of description only and are not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, the terms "comprises" and/or "comprising," when used in this application, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method or device comprising the element. In this document, each embodiment may be described with emphasis on differences from other embodiments, and the same and similar parts between the respective embodiments may be referred to each other. For methods, products, etc. of the embodiment disclosures, reference may be made to the description of the method section for relevance if it corresponds to the method section of the embodiment disclosure.

Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software may depend upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the disclosed embodiments. It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the system, the apparatus and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of a unit may be merely a division of a logical function, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to implement the present embodiment. In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. Each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

Claims

1. A method for self-cleaning of an air conditioner, comprising:

spraying water to the surface of the heat exchanger in the cooling process of the heat exchanger, and adjusting the water spraying amount according to the running frequency of a compressor;

wherein, adjust the amount of water injection according to the operating frequency of compressor, include:

spraying water to the surface of the heat exchanger at a first water spraying amount after the compressor starts to operate at a first preset frequency;

after the compressor starts to operate at a second preset frequency, spraying water to the surface of the heat exchanger at a second water spraying amount;

wherein the first preset frequency is less than the second preset frequency, and the first water spraying amount is greater than the second water spraying amount.

2. The method of claim 1, wherein the second quantity of water jets is half the first quantity of water jets.

3. The method of claim 1, wherein the first amount of water injection is half of a total amount of water injection to the heat exchanger surface.

4. The method of claim 3, wherein the total amount of water sprayed onto the heat exchanger surface is positively correlated to a predetermined frost area.

5. The method of any of claims 1 to 4, wherein adjusting the amount of water injection is based on an operating frequency of the compressor, further comprising:

after the compressor starts to operate at a third preset frequency, spraying water to the surface of the heat exchanger at a third water spraying amount;

wherein the third preset frequency is greater than the second preset frequency, and the third water spraying amount is less than or equal to the second water spraying amount.

6. The method according to any one of claims 1 to 4, comprising, after the compressor starts operating at a preset frequency:

the compressor firstly runs at a preset frequency, so that the temperature of the heat exchanger is reduced to a preset temperature;

the compressor is operated in a frequency fluctuation mode, so that the heat exchanger maintains the preset temperature;

when the preset frequency is the first preset frequency, the preset temperature is a first preset temperature; and when the preset frequency is the second preset frequency, the preset temperature is a second preset temperature.

7. The method according to claim 6, wherein the first predetermined temperature is positively correlated to a minimum frosting temperature and the second predetermined temperature is positively correlated to a minimum frosting temperature.

8. An apparatus for self-cleaning of air conditioners, comprising a processor and a memory storing program instructions, characterized in that the processor is configured to perform the method for self-cleaning of air conditioners according to any one of claims 1 to 7 when executing the program instructions.

9. An air conditioner, characterized by comprising the device for air conditioning self-cleaning as claimed in claim 8.