阅读说明：本技术 单冷空调及其自清洁方法 (Single-cooling air conditioner and self-cleaning method thereof ) 是由 郑兴业 沈业勇 于 2020-06-16 设计创作，主要内容包括：本发明提供一种单冷空调及其自清洁方法。其中,自清洁方法响应于自清洁指令,执行以下步骤：降低与蒸发器相关联的风机的转速,以使蒸发器表面的油污凝结；关闭单冷空调的压缩机并提高与蒸发器相关联的风机的转速,以使凝结在蒸发器表面的油污熔化；启动辅助加湿装置,以便在蒸发器的表面形成液滴。单冷空调包括控制器、压缩机、蒸发器、与蒸发器相关联的风机,以及辅助加湿装置；单冷空调通过控制器控制相关部件执行与自清洁方法相对应的指令。本发明通过使单冷空调蒸发器侧油污先降温凝结再升温熔化,以便将黏附在蒸发器上的油污转换为可浮在水滴表面的油污,从而解决厨房高油烟环境中单冷空调换热器上的油污不便于清理的问题。(The invention provides a single-cooling air conditioner and a self-cleaning method thereof. Wherein the self-cleaning method, in response to a self-cleaning instruction, performs the steps of: reducing the rotational speed of a fan associated with the evaporator to condense oil from the evaporator surface; turning off a compressor of the single-cooling air conditioner and increasing a rotation speed of a fan associated with the evaporator to melt oil stains condensed on a surface of the evaporator; the auxiliary humidification device is activated to form droplets on the surface of the evaporator. The single-cooling air conditioner comprises a controller, a compressor, an evaporator, a fan associated with the evaporator and an auxiliary humidifying device; the single-cooling air conditioner controls related components to execute instructions corresponding to the self-cleaning method through the controller. The oil stain on the evaporator side of the single-cooling air conditioner is cooled, condensed and heated to be melted, so that the oil stain adhered to the evaporator is converted into the oil stain capable of floating on the surface of water drops, and the problem that the oil stain on the heat exchanger of the single-cooling air conditioner is inconvenient to clean in a high oil smoke environment of a kitchen is solved.)

1. A self-cleaning method of a single-cold air conditioner is characterized in that the following steps are executed in response to a self-cleaning instruction:

reducing the rotational speed of a fan associated with the evaporator to condense oil from the evaporator surface;

turning off a compressor of the single-cooling air conditioner and increasing a rotation speed of a fan associated with the evaporator to melt oil stains condensed on a surface of the evaporator;

the auxiliary humidification device is activated to form droplets on the surface of the evaporator.

2. The method of claim 1, wherein reducing the rotational speed of a fan associated with the evaporator to condense oil from the evaporator surface comprises:

the speed of the fan associated with the evaporator is set to the lowest gear or turned off.

3. The method of claim 1, wherein increasing the rotational speed of a fan associated with the evaporator to melt oil condensation on the evaporator surface comprises:

the speed of the fan associated with the evaporator is set to the highest gear.

4. The method of claim 1, wherein activating the auxiliary humidification device to form droplets on a surface of the evaporator comprises:

and starting the auxiliary humidifying device to atomize water in a water receiving tray positioned below the evaporator so as to form liquid drops on the surface of the evaporator.

5. The method according to any one of claims 1-4, further comprising:

and starting the auxiliary heating device to increase the temperature near the evaporator so as to accelerate the melting speed of the oil stains condensed on the surface of the evaporator.

6. A single-cooling air conditioner comprising a controller, a compressor, an evaporator, a fan associated with the evaporator, and an auxiliary humidification device;

the auxiliary humidifying device is used for forming water mist near the evaporator;

the controller is in communication connection with the compressor, the evaporator, the fan and the auxiliary humidifying device; the controller is used for responding to a self-cleaning instruction and reducing the rotating speed of a fan associated with the evaporator so as to condense oil stains on the surface of the evaporator; a compressor for shutting down the single cooling air conditioner;

the auxiliary humidifying device is used for starting; and

for increasing the speed of a fan associated with the evaporator to melt oil condensation on the evaporator surface.

7. The single cold air conditioner according to claim 6, wherein said controller is configured to set a rotation speed of a fan associated with the evaporator to a lowest gear or turn it off at an initial stage.

8. The cool-only air conditioner of claim 6, wherein said controller is configured to set the speed of the fan associated with the evaporator to a highest gear after oil contaminants condense on said evaporator.

9. The single-cold air conditioner according to claim 6, further comprising an auxiliary humidifying device in communication connection with the controller, wherein the controller is further configured to control the auxiliary humidifying device to atomize water in a water pan below the evaporator.

10. A single cold air conditioner according to any one of claims 6-9, further comprising an auxiliary heating device in communication with said controller, said controller further being adapted to control said auxiliary heating device to raise the temperature in the vicinity of said evaporator.

Technical Field

The invention relates to the technical field of air conditioners, in particular to a single-cooling air conditioner suitable for a heavy oil fume environment and a self-cleaning method thereof.

Background

The kitchen belongs to high temperature high oil smoke environment, uses single cold air conditioner to improve the environment usually in the kitchen, when using single cold air conditioner to carry out air cycle, the mixed oil smoke of dust in the air is together inhaled in the single cold air conditioner and is adhered to the heat exchanger, influences the heat exchange efficiency of single cold air conditioner. Therefore, the oil stains adhered to the heat exchanger need to be cleaned regularly or irregularly to ensure that the heat exchanger has ideal heat exchange efficiency. At present, a single-cold air conditioner installed for a kitchen usually adopts a mode of manually disassembling and washing a heat exchanger to clean oil stains, but the mode is time-consuming and labor-consuming.

Disclosure of Invention

The invention provides a single-cooling air conditioner and a self-cleaning method and device thereof, which solve the problem that oil stains on a single-cooling air conditioner heat exchanger in a high oil smoke environment of a kitchen are inconvenient to clean.

The invention provides a self-cleaning method of a single-cold air conditioner aiming at the problems, which responds to a self-cleaning instruction and executes the following steps:

reducing the rotational speed of a fan associated with the evaporator to condense oil from the evaporator surface;

turning off a compressor of the single-cooling air conditioner and increasing a rotation speed of a fan associated with the evaporator to melt oil stains condensed on a surface of the evaporator;

the auxiliary humidification device is activated to form droplets on the surface of the evaporator.

In an alternative embodiment, the reducing the rotational speed of a fan associated with the evaporator to condense oil from the evaporator surface comprises:

the speed of the fan associated with the evaporator is set to the lowest gear or turned off.

In an alternative embodiment, the increasing the rotation speed of a fan associated with the evaporator to melt the oil condensed on the surface of the evaporator comprises:

the speed of the fan associated with the evaporator is set to the highest gear.

In an alternative embodiment, the activating the auxiliary humidification device to form liquid droplets on the surface of the evaporator includes:

and starting the auxiliary humidifying device to atomize water in a water receiving tray positioned below the evaporator so as to form liquid drops on the surface of the evaporator.

In an optional embodiment, the self-cleaning method further includes:

and starting the auxiliary heating device to increase the temperature near the evaporator so as to accelerate the melting speed of the oil stains condensed on the surface of the evaporator.

A single-cold air conditioner comprising a controller, a compressor, an evaporator, a fan associated with the evaporator, and an auxiliary humidification device;

the auxiliary humidifying device is used for forming water mist near the evaporator;

the controller is in communication connection with the compressor, the evaporator, the fan and the auxiliary humidifying device; the controller is used for responding to a self-cleaning instruction and reducing the rotating speed of a fan associated with the evaporator so as to condense oil stains on the surface of the evaporator; a compressor for shutting down the single cooling air conditioner;

the auxiliary humidifying device is used for starting; and

for increasing the speed of a fan associated with the evaporator to melt oil condensation on the evaporator surface.

In the above-described single cold air conditioner, optionally, the controller is configured to set the rotation speed of the fan associated with the evaporator to a lowest gear or turn it off at an initial stage.

In an alternative embodiment, the controller is adapted to set the speed of a fan associated with the evaporator to a highest gear after oil has condensed on the evaporator.

In an optional embodiment, the water dispenser further comprises an auxiliary humidifying device in communication connection with the controller, and the controller is further used for controlling the auxiliary humidifying device to atomize water in a water pan below the evaporator.

In an alternative embodiment, a single-cooling air conditioner further comprises an auxiliary heating device in communication with the controller, and the controller is further configured to control the auxiliary heating device to raise the temperature near the evaporator.

According to the self-cleaning method provided by the embodiment of the invention, firstly, the temperature of the evaporator side is reduced to enable the oil stain on the surface of the evaporator to reach a condensation state, then the temperature of the evaporator side is increased to enable the oil stain on the surface of the evaporator to be melted, an auxiliary humidifying device is utilized to increase water drops on the surface of the evaporator, and the oil stain melted by temperature rise is fused in the water drops and taken away with water flow, so that cleaning is realized, and the problem that the oil stain is adhered to the surface of the evaporator and is difficult to automatically clean is solved.

According to the single-cooling air conditioner provided by the embodiment of the invention, the rotating speed reduction of the fan associated with the evaporator is reduced through the controller, so that the surface temperature of the evaporator is reduced to condense oil stains, and the controller is used for controlling the closing of the compressor and increasing the rotating speed of the fan associated with the evaporator so that the surface temperature of the evaporator is increased to melt the oil stains; the auxiliary humidifying device is controlled by the controller to increase the liquid drop amount on the surface of the evaporator so as to improve the efficiency of cleaning oil stains, so that the self-cleaning of the single-cooling air conditioner is realized, and the problem that the oil stains of the evaporator of the single-cooling air conditioner are difficult to automatically clean is solved.

Drawings

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

Fig. 1 is a flowchart illustrating a self-cleaning method of a single-cooling air conditioner according to an embodiment of the present invention;

fig. 2 is a block diagram illustrating a self-cleaning method of a single-cooling air conditioner according to an embodiment of the present invention;

fig. 3 is an internal structure view of a single-cooling air conditioner according to an embodiment of the present invention;

fig. 4 is a schematic diagram of an evaporator side arrangement in a single-cooling air conditioner according to an embodiment of the present invention.

Reference numerals:

an evaporator-11;

an evaporation fan-12;

an indoor air inlet-13;

condenser-14;

a condensing fan-15;

an outdoor air outlet-16;

a compressor-17;

refrigerant connecting pipe-18;

controller-19;

a temperature sensor-21;

auxiliary heating means-22;

a water pan-23;

auxiliary humidifying device-24.

Detailed Description

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

In the description of the present specification, reference to the description of the terms "one embodiment", "some embodiments", "an illustrative embodiment", "an example", "a specific example", or "some examples", etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The kitchen belongs to the environment of high temperature and many oil smoke, generally uses single cold air conditioner to carry out air circulation in the kitchen, and the single cold air conditioner is an air conditioner with only a refrigeration function, and can improve the oil smoke environment of the kitchen and reduce the temperature of the kitchen. When the single-cooling air conditioner is applied to the environment with high oil smoke in a kitchen, a part of oil smoke and dust in the kitchen are removed through filtering of the filter screen, a small part of oil smoke and dust can enter the air conditioner along with air flow and adhere to the surface of the heat exchanger, and a thick oil film is formed on the surface of the evaporator after the oil smoke is accumulated for a long time, so that the heat exchange efficiency of the single-cooling air conditioner is influenced. Because greasy dirt is adhered to the surface of the heat exchanger through long-term accumulation and is difficult to clean, a professional is usually required to disassemble the heat exchanger manually for cleaning, and time and labor are wasted.

After the inventor finds the problems, through repeated tests and demonstration, the process that the single-cooling air conditioner can adjust the temperature and the substances are subjected to phase change at different temperatures is fully utilized, and the oil stain self-cleaning is realized. Specifically, the oil stains adhered to the surface of the heat exchanger are cooled and condensed, and then the condensed oil stains are heated and melted, so that the adhesion force of the oil stains adhered to the surface of the heat exchanger is reduced, the oil stains can be melted with water drops and float on the surface of the water drops, and finally the oil stains flow away along with the water drops, and the oil stains are self-cleaned.

The first embodiment is as follows:

fig. 1 is a flowchart of a self-cleaning method of a single-cold air conditioner according to an embodiment of the present invention, and fig. 2 is a block diagram of a self-cleaning method of a single-cold air conditioner according to an embodiment of the present invention.

Referring to fig. 1 and 2, in the self-cleaning method for a single-cold air conditioner provided in this embodiment, in response to a self-cleaning instruction, the self-cleaning instruction may be issued by a user, for example, the self-cleaning instruction may be issued to a controller of the single-cold air conditioner through a remote controller, a client APP, a button provided on the air conditioner, or the like. Certainly, the air conditioner may also automatically trigger a built-in self-cleaning program after reaching a certain preset condition, for example, a preset working time is preset, the self-cleaning program of the single-cooling air conditioner is triggered by the pressure change of a pressure sensor testing machine arranged in the single-cooling air conditioner and the outlet air temperature in the room tested by a temperature sensor, and whether the pressure and the temperature exceed a set threshold is judged according to the pressure and the temperature indexes.

Referring to fig. 1, after the controller of the air conditioner obtains the self-cleaning command, the following steps are performed:

and S101, reducing the rotating speed of a fan associated with the evaporator to condense the oil stains on the surface of the evaporator.

Note that the blower fan associated with the evaporator in the present embodiment refers to an evaporation blower fan provided on the evaporator side for sending cool air into the room.

When the single-cold air conditioner normally works, the compressor compresses gaseous refrigerant into high-temperature high-pressure gas refrigerant, then the gas refrigerant is sent to the condenser for heat dissipation, and then the gas refrigerant becomes normal-temperature high-pressure liquid refrigerant, the liquid refrigerant enters the evaporator through the refrigerant connecting pipe, the space is suddenly increased, the pressure is reduced, the liquid refrigerant is vaporized, and the gas refrigerant becomes gaseous low-temperature refrigerant, so that a large amount of heat is absorbed, and the evaporator becomes cold. If the air flow on the evaporator side is slow or non-circulating, the heat exchange effect of the evaporator is poor, the temperature of the surface of the evaporator is further reduced, and the air flow speed on the evaporator side is reduced by reducing the rotating speed of a fan associated with the evaporator, so that the temperature on the evaporator side is continuously reduced.

In order to measure the temperature of the evaporator surface, a temperature sensor for detecting the evaporator temperature is optionally provided on the evaporator, which temperature sensor is connected in communication with the controller of the air conditioner. After the air conditioner obtains the self-cleaning instruction, the rotation speed of a fan associated with the evaporator is reduced, even the air conditioner can stop running, so that the surface temperature of the evaporator is gradually reduced, when the temperature sensor detects that the temperature of the evaporator is less than or equal to the temperature for condensing the oil stains, the time for condensing the oil stains is preset, and when the time for condensing the oil stains is reached, the air conditioner stops running, so that the oil stains are considered to be completely condensed.

Illustratively, the single-cold air conditioner normally operates for refrigeration, the compressor of the single-cold air conditioner operates at a set frequency f, the evaporator fan is controlled to operate at the lowest speed or stop operating when receiving a self-cleaning command, and the evaporator is operated at a temperature less than or equal to T1 for a set time period T1 when the temperature sensor measures that the temperature of the evaporator is reduced to a set temperature T1 for condensing oil stains, so that the oil stains are completely condensed.

Therefore, the oil stain on the evaporator can be condensed simply and conveniently by reducing the rotating speed of the evaporation fan and continuously reducing the temperature of the evaporator side.

And S102, turning off a compressor of the single-cooling air conditioner and increasing the rotating speed of a fan associated with the evaporator so as to melt oil stains condensed on the surface of the evaporator.

And after the oil stains are condensed, closing a compressor of the single-cooling air conditioner and increasing the rotating speed of a fan associated with the evaporator so as to heat the evaporator, so that the oil stains condensed on the surface of the evaporator are melted. It should be understood that when the compressor of the single cooling air conditioner is turned off, the refrigerant in the single cooling air conditioner stops flowing, the air conditioner does not refrigerate any more, the temperature of the evaporator gradually rises due to insufficient heat exchange, and the temperature in the air conditioner quickly rises to the indoor temperature level, so that the oil stains are gradually melted.

For example, after the oil stain is condensed, the single-cooling air conditioner can be controlled to operate in a normal mode, namely, the evaporation fan is controlled to be turned on again and operate at a normal rotating speed, then the compressor is turned off, and the temperature of the evaporator is measured through the temperature sensor. Of course, the compressor may be turned off first, and then the evaporation fan may be started and the rotation speed of the fan may be adjusted.

For another example, the rotation speed of the fan associated with the evaporator may be increased above the normal rotation speed to further increase the melting efficiency of the oil stains on the surface of the evaporator. Specifically, after oil stains are condensed, the single-cooling air conditioner is controlled to close the compressor, the rotating speed of the evaporation fan is controlled to be increased to the highest level, and the condensing fan is enabled to blow air continuously at a high rotating speed to increase the turbulent flow of the air, so that the melting efficiency of the oil stains is improved.

For example, in an alternative example, the rotation speed of the evaporation fan is controlled to a normal wind speed simultaneously with or after the command of turning off the compressor is executed, the temperature of the surface of the evaporator is detected by the temperature sensor, timing is started when the measured temperature is greater than or equal to a set temperature T2 at which the oil stains are melted, and a set time T2 is operated. Or, at the same time of or after executing the command of closing the compressor, controlling the rotating speed of the evaporation fan to the highest gear, detecting the temperature of the surface of the evaporator through a temperature sensor, starting timing when the measured temperature is greater than or equal to a set temperature T2 for melting the oil stains, and operating for a set time T3, wherein T3 is less than T2.

And S103, starting the auxiliary humidifying device so as to form liquid drops on the surface of the evaporator.

After the oil stains are melted, part of the oil stains can be mechanically adhered to the surface of the evaporator, the other part of the oil stains can be taken away through liquid drops condensed on the surface of the evaporator, and the liquid drops can be formed by condensing air through moisture in the air or can be added through an auxiliary humidifying device.

For example, in one possible implementation, the auxiliary humidification device atomizes water in a water receiving tray below the evaporator, but also can atomize an externally arranged water source. The atomized water vapor is condensed again into water droplets on the surface of the evaporator, and the more atomized water in the air, the more water droplets are condensed on the surface of the evaporator. The water drops can flow downwards along the surface of the evaporator, and the melted oil stain can float on the surface of the water drops and drop into the water receiving tray along with the water flow, so that the oil stain on the surface of the evaporator can be cleaned. It will be readily appreciated that the more water droplets that condense, the more efficient the cleaning of the oil.

Optionally, a humidity sensor is disposed proximate the evaporator for detecting the humidity surrounding the evaporator, the humidity sensor being communicatively coupled to a controller of the air conditioner. After the oil stain is condensed, the auxiliary humidifying device is started to gradually increase the humidity of the evaporator side, and the humidity near the evaporator is detected by the humidity sensor so as to further control the self-cleaning process of the oil stain. Specifically, the timing is started when the humidity sensor detects that the humidity value is greater than or equal to a set humidity value, and the humidification is stopped when the set time period is reached.

Illustratively, the auxiliary humidifying device is turned on simultaneously with or after turning off the compressor, and as the humidity in the air increases, the more the condensed water drops on the evaporator surface, whether the humidity value on the evaporator side reaches a humidity value S1 that satisfies the cleaning of the oil contamination is detected by the humidity sensor, and a timer is started when the humidity value is greater than or equal to S1, and the auxiliary humidifying device is operated for a set time period t4 at a humidity value greater than or equal to S1.

The self-cleaning method of the single-cooling air conditioner provided by the embodiment is based on the theoretical characteristics that oil stains can be condensed when the temperature is reduced to a certain degree and can be melted when the temperature is increased to a certain degree, and the self-cleaning method can be used for cleaning the oil stains in the air conditioner, so that the temperature can be easily reduced and increased through an evaporator, a compressor and the like in the air conditioner. Oil stains adhered to the heat exchanger are converted into an oil drop form through condensation and remelting, the oil stain is no longer adhered to the surface of the fin, accordingly, the adhesive force of the oil stains on the surface of the evaporator is reduced, the auxiliary humidifying device is matched to improve the flow of condensed water on the heat exchanger, the oil stains are cleaned through fusion of continuous water flow and oil drops, and finally the surface of the heat exchanger is cleaned.

For example, in one alternative example, the single-cold air conditioner operates at a set frequency f during normal operation of the compressor, while the condenser, evaporator and fan associated with the heat exchanger are operating normally.

And when receiving a self-cleaning instruction, controlling the evaporation fan to operate or stop operating at the lowest gear of rotation speed.

When the temperature sensor measures that the evaporator temperature is lowered to the set temperature T1 at which the oil stains are coagulated, the temperature sensor is operated at a temperature less than or equal to T1 for a set time period T1 to completely coagulate the oil stains.

After the oil stain is condensed, the compressor is controlled to be closed, the rotating speed of a fan related to the evaporator is increased to the highest gear, and the temperature of the surface of the evaporator is detected through a temperature sensor. The timing is started when the measured temperature is greater than or equal to the set temperature T2 for melting the oil stains, and is operated for a set time period T3 at a temperature greater than or equal to the set temperature T2 for melting the oil stains, so that the solidified oil stains are melted.

And simultaneously or after the compressor is closed, the auxiliary humidifying device is opened for humidifying. Whether the humidity value of the evaporator side reaches a humidity value S1 which meets the requirement of cleaning the greasy dirt is detected through a humidity sensor, timing is started when the humidity value is greater than or equal to S1, and the evaporator is operated for a set time period t4 at the humidity value greater than or equal to S1, so that condensed water drops on the evaporator are increased, and the cleaning efficiency of the greasy dirt is improved.

Referring to fig. 2, in an alternative embodiment, the self-cleaning method of the single-cooling air conditioner may also increase the temperature of the evaporator 11 side by activating the auxiliary heating device 32, thereby increasing the melting efficiency of the condensed oil.

For example, the auxiliary heating device 32 connected to the air conditioner controller in communication may be activated to perform auxiliary heating when the oil contamination condensation is completed and the humidification is performed by the auxiliary humidification device. Meanwhile, the temperature of the evaporator 11 may be detected by a temperature sensor, and when the detected temperature is greater than or equal to a preset temperature for melting the oil stains, timing is started to operate for a predetermined time period to accelerate the melting of the oil stains.

In an alternative example, when the compressor 17 is turned off or after the compressor 17 is turned off, the auxiliary humidifying device 24 and the auxiliary heating device 32 are started, the rotation speed of the evaporation fan 12 is controlled to the highest gear, whether the temperature of the evaporator 11 reaches the set temperature T2 for melting the oil stains is detected by using the temperature sensor, the time is started when the temperature is greater than or equal to T2, the temperature is operated for the set time period T5 at the temperature greater than or equal to T2, and T5 is less than or equal to T2.

In the implementation of the present embodiment, the oil contamination can be cleaned by other combinations and overlapping of the steps, and several possible embodiments are selected and described herein.

With continued reference to fig. 2, in another possible embodiment, step S101, step S102 and step S103 are executed, that is, execution of a command for turning on the auxiliary humidification device 24 is added, in addition to the detected temperature value T2, the present embodiment needs to detect whether the humidity value on the evaporator 11 side reaches a humidity value S1 for cleaning the oil stains through a humidity sensor, start timing when the humidity value is greater than or equal to S1, operate for a set time period T4 for cleaning the melted oil stains with the water flow at the humidity value greater than or equal to S1, increase the amount of water drops condensed on the evaporator surface through adding the auxiliary humidification device 24, and improve the oil stain cleaning efficiency and the oil stain cleaning effect through taking away the oil stains with more water drops.

With continued reference to fig. 2, in another alternative implementation, executing all of the steps comprising steps S101-S103 also adds execution of the command to control turning on the auxiliary heating. Specifically, when the single-cooling air conditioner is in a normal operation state, that is, the compressor 17 is operated at the set frequency f, the condenser 14, the evaporator 11, and the evaporator fan 12 are normally operated.

And when receiving the self-cleaning instruction, controlling the evaporation fan 12 to operate at the lowest gear speed or stop operating. The temperature of the evaporator surface 11 is detected by means of a temperature sensor and when the temperature drops to a set temperature T1 at which the oil stains condense, and is operated at a temperature less than or equal to T1 for a set time period T1 in order to completely condense the oil stains.

After the oil stains are condensed, the compressor 17 is controlled to be turned off, the rotating speed of the evaporator fan 12 is increased to the highest gear, the auxiliary heating device is turned on, the temperature of the surface of the evaporator 11 is detected through the temperature sensor, timing is started when the measured temperature is greater than or equal to the set temperature T2 for melting the oil stains, and the set time is operated to melt the solidified oil stains.

At the same time as or after the compressor 17 is turned off, the auxiliary humidifying device 24 is turned on for humidification. Whether the humidity value of the evaporator 11 side reaches a humidity value S1 which satisfies the cleaning of the oil contamination is detected by a humidity sensor, and when the humidity value is greater than or equal to S1, timing is started and the evaporator is operated for a set time period t4 at a humidity value greater than or equal to S1 to increase condensed water droplets on the evaporator 11, thereby improving the cleaning efficiency of the oil contamination.

Example two:

fig. 3 is an internal structure view of a single-cooling air conditioner according to the present embodiment; fig. 4 is a schematic diagram of an evaporator side arrangement in a single cooling air conditioner provided by the present embodiment.

Referring to fig. 3 to 4, the present application takes an integral single-cooling air conditioner as an example, and more specifically, refers to an air conditioner in which an indoor unit and an outdoor unit of the air conditioner are integrally disposed. Referring to fig. 3, the unitary single-cooling air conditioner includes an evaporator 11, a condenser 14 and a compressor 17, which are connected in series through a refrigerant connection pipe 18 to form a circulation loop, which can be used for heat exchange in a kitchen.

A condensing fan 15 is arranged on the side of the condenser 14, an outdoor air outlet 16 is correspondingly arranged at the condensing fan 15, and the condensing fan 15 is used for discharging side air passing through the condenser 14 to the outdoor.

An evaporation fan 12 is arranged on the evaporator 11 side, an indoor air inlet 13 is correspondingly arranged on the evaporation fan 12 side, and the evaporation fan 12 is used for discharging the air on the evaporator 11 side to the indoor from the indoor air inlet 13.

The evaporator 11 lowers the temperature by vaporizing the refrigerant in a liquid state to take away ambient heat, and the condenser 14 lowers the temperature by condensing the refrigerant at a high temperature to dissipate heat.

When the single-cooling air conditioner works, the compressor 17 compresses the gaseous refrigerant input by the evaporator 11 into a high-temperature high-pressure gaseous refrigerant, and then the gaseous refrigerant is sent into the condenser 14 and becomes a normal-temperature high-pressure liquid refrigerant after heat dissipation. The liquid refrigerant enters the evaporator 11 through the refrigerant connection pipe 18, the liquid refrigerant is vaporized to become a gaseous low-temperature refrigerant, so that a large amount of heat in the surrounding air is absorbed, and the vaporized refrigerant is compressed by the compressor 17 and then enters the evaporator 11 for the next cycle. The cooled cold air is blown out from the indoor air inlet 13, so that the environment of a kitchen with oil smoke and high temperature is improved.

During the operation of the single-cooling air conditioner, water vapor in the air around the evaporator 11 meets the cold evaporator 11 and is condensed into water drops on the fins of the evaporator 11, and the water drops slide down the fins and enter the water pan 23 arranged below the evaporator 11.

With continued reference to fig. 3 and 4, the present embodiment provides a single-cooling air conditioner, which includes a controller 19, a compressor 17, an evaporator 11, an evaporation fan 12, and an auxiliary humidification device 24.

The auxiliary humidifying device 24 is used to form water mist near the evaporator 11.

The controller 19 is in communication with the compressor 17, the evaporator 11, the evaporation fan 12 and the auxiliary humidification device 24, and is configured to reduce the rotation speed of the evaporation fan 12 associated with the evaporator 11 in response to a self-cleaning command to condense the oil stains on the surface of the evaporator 11, and also to turn off the compressor 17 of the single-cooling air conditioner, and to activate the auxiliary humidification device 24 to increase the water droplets on the surface of the evaporator 11 and increase the rotation speed of the evaporation fan 12 associated with the evaporator 11 to melt the oil stains condensed on the surface of the evaporator 11.

With continuing reference to fig. 3 and 4, as will be understood in conjunction with the embodiment, after the self-cleaning device provided by the present invention receives the self-cleaning command, the structure for receiving the command may be a receiver disposed in the air conditioner or triggered by a self-starting program disposed in the controller 19, and the controller 19 reduces the rotation speed of the evaporation fan 12 on the evaporator 11 side of the single-cooling air conditioner or stops the operation, so that the oil stains on the evaporator 11 side are gradually condensed due to the temperature reduction. After the condensation is finished, the controller 19 controls to turn off the compressor 17 of the single-cooling air conditioner and increase the rotation speed of the evaporation fan 12, so that the oil stains on the surface of the evaporator 11 are melted. At the same time of starting the compressor 17 or after starting the compressor, the controller 19 starts the auxiliary humidifying device 24 to form liquid drops on the surface of the evaporator 11, and oil stains are carried away by the liquid drops, so that the cleaning of the oil stains is accelerated.

A water receiving tray 23 is arranged in the single-cooling air conditioner, the water receiving tray 23 is arranged right below the evaporator 11, and the water receiving tray 23 is used for receiving water drops which are condensed and slide off on the surface of the evaporator 11 by the moisture in the air.

Referring to fig. 4, the single cooling air conditioner determines whether the temperature reaches the set temperature through the temperature sensor 21 and feeds back a signal to the controller 19, and the controller 19 controls the execution of the relevant program. Alternatively, the temperature sensor 21 is provided on one side of the evaporator 11. The single-cooling air conditioner judges whether the humidity in the air reaches a set humidity value through a humidity sensor, and feeds back a signal to the controller 19, and the controller 19 controls and executes a relevant program. Optionally, the humidity sensor is disposed on a side wall of the evaporator 11 (not shown in the figure).

In some examples, an auxiliary humidifying device 24 is provided on the drip tray 23 for atomizing water within the drip tray 23. For example, the auxiliary humidifying device 24 may be a piezoelectric ceramic plate, which converts liquid water into gaseous water mist by converting a high-frequency voltage signal into high-frequency vibration. The auxiliary humidifying device 24 can increase the humidity of the evaporator 11 side, thereby improving the cleaning efficiency.

In some examples, the self-cleaning device further comprises an auxiliary heating device 22. Optionally, an auxiliary heating device 22 is fixed to the drip tray 23. The auxiliary warming device 22 may be provided as an electric heater, and may be a resistance wire, for example. The auxiliary heating device 22 increases the temperature of the evaporator 11 side, thereby accelerating the melting of the condensed oil.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.