CN109631658B - Evaporator cleaning control method and device and air conditioner - Google Patents

Evaporator cleaning control method and device and air conditioner Download PDF

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Publication number
CN109631658B
CN109631658B CN201811627151.4A CN201811627151A CN109631658B CN 109631658 B CN109631658 B CN 109631658B CN 201811627151 A CN201811627151 A CN 201811627151A CN 109631658 B CN109631658 B CN 109631658B
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China
Prior art keywords
evaporator
air conditioner
actual temperature
cleaning
coil
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CN109631658A (en
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肖旭东
黄春
刘合心
章秋平
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Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
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Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41—Defrosting; Preventing freezing
    • F24F11/43—Defrosting; Preventing freezing of indoor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Human Computer Interaction (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention provides an evaporator cleaning control method, an evaporator cleaning control device and an air conditioner, wherein the method comprises the following steps: when the air conditioner enters a self-cleaning mode, the evaporator is cleaned in at least one of frost cleaning and water cleaning modes, after the air conditioner exits the self-cleaning mode, the total water amount generated in the cleaning process is obtained, and the next cleaning time period of the evaporator is determined according to the total water amount, so that the evaporator is kept in a clean state for a long time, the breeding of bacteria is effectively avoided, the cleanness of an air conditioner inner unit is ensured, fresh air without peculiar smell and bacteria can be blown out when the air conditioner operates, and the user experience is improved.

Description

Evaporator cleaning control method and device and air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to an evaporator cleaning control method and device and an air conditioner.
Background
At present, most of cleaning of an air conditioner indoor unit is achieved by only depending on condensed water cleaning or frosting cleaning, the cleaning effect is not judged, and incomplete cleaning may occur. Once the washing is not thorough enough, after the air conditioner used a period of time, lead to breeding a lot of bacteriums on the evaporimeter easily, when the air conditioner was moved, the wind that blows out had peculiar smell and bacterium, has seriously influenced user experience and health.
Disclosure of Invention
The invention solves the problems that the cleaning effect can not be judged in the prior art, and bacteria are easy to breed when an evaporator is not cleaned thoroughly.
In order to solve the above problem, the present invention provides an evaporator cleaning control method, which is applied to an air conditioner including an evaporator, and the method includes:
when the air conditioner enters a self-cleaning mode, cleaning the evaporator in at least one of a frost cleaning mode and a water cleaning mode;
after the air conditioner exits the self-cleaning mode, acquiring the total water amount generated in the cleaning process;
and determining the next cleaning time period of the evaporator according to the total water amount.
In the evaporator cleaning control method provided by the invention, after the air conditioner enters the self-cleaning mode, the evaporator is cleaned by adopting at least one of two cleaning modes of frost cleaning and water cleaning, so that dust on the surface of the evaporator can be effectively cleaned, and the cleaning effect of the evaporator is improved; after the air conditioner exits from the self-cleaning mode, the total water amount generated in the process of cleaning the evaporator is calculated, the next cleaning time period is determined according to the total water amount, the cleaning effect of the evaporator can be reflected according to the total water amount generated in the cleaning process of the evaporator, namely, the total water amount generated is more, the cleaning effect of the evaporator is better, the total water amount generated is less, the cleaning effect of the evaporator is poorer, the next cleaning time period of the evaporator is determined according to the total water amount, the evaporator can be kept in a clean state for a long time, the breeding of bacteria is effectively avoided, the cleanness of an air conditioner indoor unit is guaranteed, the air conditioner can blow out fresh air without odor and bacteria when in operation, and the user experience is improved.
Further, the step of determining a next time period for cleaning the evaporator according to the total amount of water comprises:
the more the total water amount is, the longer the next cleaning time period determined according to the total water amount is; the smaller the total amount of water, the shorter the next cleaning time period determined based on the total amount of water.
In the invention, as the total water amount generated in the cleaning process of the evaporator can reflect the cleaning effect of the evaporator, when the generated total water amount is more, the cleaning effect of the evaporator is better, and the next cleaning can be carried out at intervals of longer time, the longer the next cleaning time period determined according to the total water amount is; when the total water amount is less, the cleaning effect of the evaporator is poor, and the next cleaning is needed at a short interval to ensure the cleanness of the evaporator and avoid bacteria breeding, so that the next cleaning time period determined according to the total water amount is shorter.
Further, the step of cleaning the evaporator in at least one of a frost wash and a water wash includes:
controlling the surface of the evaporator to frost;
controlling frost melting on the evaporator;
controlling the surface of the evaporator to produce condensed water.
In the invention, after the air conditioner enters the self-cleaning mode, the evaporator is firstly cleaned for the first time through the processes of frosting and defrosting, and then the evaporator is cleaned for the second time through the generated condensed water, so that the dust on the surface of the evaporator can be effectively cleaned, and the cleaning effect of the evaporator is improved.
Further, the air conditioner further comprises a compressor and an electronic expansion valve, and the step of controlling the surface of the evaporator to frost comprises:
in a refrigeration mode, adjusting the opening degree of the electronic expansion valve and/or the frequency of the compressor according to the actual temperature of an indoor unit coil of the air conditioner so as to enable the actual temperature of the indoor unit coil to be less than or equal to a first target temperature;
and when the actual temperature of the coil pipe of the internal machine is less than or equal to the first target temperature, controlling the air conditioner to operate for a first preset time so as to frost the surface of the evaporator.
In the invention, the actual temperature of the coil of the internal machine of the air conditioner is less than or equal to the first target temperature by adjusting the opening of the electronic expansion valve and/or the frequency of the compressor, and when the air conditioner operates for the first preset time under the condition that the actual temperature of the coil of the internal machine is less than or equal to the first target temperature, the aim of frosting the surface of the evaporator can be achieved.
Further, the step of adjusting the opening degree of the electronic expansion valve and/or the frequency of the compressor according to the actual temperature of the indoor unit coil of the air conditioner so that the actual temperature of the indoor unit coil is less than or equal to the first target temperature includes:
when the actual temperature of the indoor unit coil is higher than the first target temperature, reducing the opening degree of the electronic expansion valve to enable the actual temperature of the indoor unit coil to be lower than or equal to the first target temperature;
when the opening degree of the electronic expansion valve is reduced to a first preset opening degree, if the actual temperature of the inner machine coil is still higher than the first target temperature, the frequency of the compressor is increased until the actual temperature of the inner machine coil is lower than or equal to the first target temperature.
In the invention, when the air conditioner is in a refrigeration mode, if the actual temperature of the coil pipe of the internal machine is higher than a first target temperature, the pressure of the refrigerant of the internal machine can be reduced by reducing the opening degree of the electronic expansion valve, so that the evaporation temperature is reduced, and the purpose of reducing the actual temperature of the coil pipe of the internal machine is achieved; and when the opening of the electronic expansion valve cannot meet the condition that the actual temperature of the coil of the inner machine is less than or equal to the first target temperature, the frequency of the compressor is adjusted, the refrigerant pressure of the inner machine is reduced by increasing the frequency of the compressor, the actual temperature of the coil of the inner machine is further reduced, and the frosting effect on the surface of the evaporator is effectively ensured.
Further, the air conditioner further comprises a compressor and an electronic expansion valve, and the step of controlling the frost melting on the evaporator comprises:
in a refrigeration mode, adjusting the opening degree of the electronic expansion valve and/or the frequency of the compressor according to the actual temperature of an indoor unit coil of the air conditioner so as to enable the actual temperature of the indoor unit coil to be greater than or equal to a second target temperature;
and when the actual temperature of the coil pipe of the internal machine is greater than or equal to the second target temperature, controlling the air conditioner to run for a second preset time so as to melt frost on the evaporator.
In the invention, the actual temperature of the coil of the inner machine of the air conditioner is greater than or equal to the second target temperature by adjusting the opening of the electronic expansion valve and/or the frequency of the compressor, and when the air conditioner operates for the second preset time under the condition that the actual temperature of the coil of the inner machine is greater than or equal to the second target temperature, the frost on the surface of the evaporator can be melted completely.
Further, the step of adjusting the opening degree of the electronic expansion valve and/or the frequency of the compressor according to the actual temperature of the indoor unit coil of the air conditioner so that the actual temperature of the indoor unit coil is greater than or equal to the second target temperature includes:
when the actual temperature of the indoor unit coil is lower than the second target temperature, increasing the opening degree of the electronic expansion valve to enable the actual temperature of the indoor unit coil to be higher than or equal to the second target temperature;
when the opening degree of the electronic expansion valve is increased to a second preset opening degree, if the actual temperature of the inner machine coil is still lower than the second target temperature, the frequency of the compressor is reduced until the actual temperature of the inner machine coil is higher than or equal to the second target temperature.
In the invention, when the air conditioner is in a refrigeration mode, if the actual temperature of the coil pipe of the internal machine is lower than a second target temperature, the pressure of the refrigerant of the internal machine can be raised by raising the opening degree of the electronic expansion valve, so that the evaporation temperature is raised, and the purpose of raising the actual temperature of the coil pipe of the internal machine is achieved; and when adjusting the electronic expansion valve aperture and can't satisfy when interior machine coil pipe actual temperature is greater than or equal to second target temperature, then begin to adjust the frequency of compressor, rise interior machine refrigerant pressure through the frequency that reduces the compressor, and then rise interior machine coil pipe actual temperature, make the frost on evaporimeter surface melt and finish, effectively guaranteed the frost washing effect of evaporimeter.
Further, the air conditioner further comprises a compressor and an electronic expansion valve, and the step of controlling the surface of the evaporator to generate condensed water comprises:
in a refrigeration mode, adjusting the opening degree of the electronic expansion valve and/or the frequency of the compressor according to the actual temperature of an indoor unit coil of the air conditioner so as to enable the actual temperature of the indoor unit coil to be less than or equal to a third target temperature;
and when the actual temperature of the coil of the internal machine is less than or equal to the third target temperature, controlling the air conditioner to run for a third preset time so as to enable the surface of the evaporator to generate condensed water.
In the invention, the actual temperature of the coil of the inner machine of the air conditioner is less than or equal to the third target temperature by adjusting the opening of the electronic expansion valve and/or the frequency of the compressor, and when the air conditioner operates for the third preset time under the condition that the actual temperature of the coil of the inner machine is less than or equal to the third target temperature, more condensed water can be formed on the surface of the evaporator, so that the evaporator is cleaned by the condensed water.
Further, the step of adjusting the opening degree of the electronic expansion valve and/or the frequency of the compressor according to the actual temperature of the indoor unit coil of the air conditioner so that the actual temperature of the indoor unit coil is less than or equal to the third target temperature includes:
when the actual temperature of the indoor unit coil is higher than the third target temperature, reducing the opening degree of the electronic expansion valve to enable the actual temperature of the indoor unit coil to be lower than or equal to the third target temperature;
when the opening degree of the electronic expansion valve is reduced to a third preset opening degree, if the actual temperature of the inner machine coil is still higher than the third target temperature, the frequency of the compressor is increased until the actual temperature of the inner machine coil is lower than or equal to the third target temperature.
In the invention, when the air conditioner is in a refrigeration mode, if the actual temperature of the coil pipe of the inner machine is higher than a third target temperature, the pressure of the refrigerant of the inner machine can be reduced by reducing the opening degree of the electronic expansion valve, so that the evaporation temperature is reduced, and the purpose of reducing the actual temperature of the coil pipe of the inner machine is achieved; and when adjusting the electronic expansion valve aperture and can't satisfy when interior machine coil pipe actual temperature is less than or equal to third target temperature, then begin to adjust the frequency of compressor, reduce interior machine refrigerant pressure through the frequency that risees the compressor, and then reduce interior machine coil pipe actual temperature to make the evaporimeter surface can form more comdenstion water, thereby carry out the comdenstion water washing to the evaporimeter.
Further, after the step of cleaning the evaporator in at least one of the frost washing and the water washing, the evaporator cleaning control method further includes:
and drying the evaporator.
In the invention, after the evaporator is cleaned in at least one of the two cleaning modes of frost cleaning and water cleaning, a humid environment on the evaporator is easy to breed a lot of bacteria, and the breeding of the bacteria can be effectively avoided by drying the evaporator.
Further, the air conditioner further comprises a compressor and an electronic expansion valve, and the step of drying the evaporator comprises:
in the heating mode, the opening degree of the electronic expansion valve and/or the frequency of the compressor are/is adjusted according to the actual temperature of an indoor unit coil of the air conditioner, so that the actual temperature of the indoor unit coil is greater than or equal to a fourth target temperature;
and when the actual temperature of the coil of the internal machine is greater than or equal to the fourth target temperature, controlling the air conditioner to run for a fourth preset time so as to dry the moisture on the surface of the evaporator.
In the invention, the actual temperature of the coil of the inner machine of the air conditioner is greater than or equal to the fourth target temperature by adjusting the opening of the electronic expansion valve and/or the frequency of the compressor, and when the air conditioner runs for the fourth preset time under the condition that the actual temperature of the coil of the inner machine is greater than or equal to the fourth target temperature, the water on the surface of the evaporator can be dried to finish self-cleaning, thereby avoiding bacteria breeding in a humid environment.
Further, the step of adjusting the opening degree of the electronic expansion valve and/or the frequency of the compressor according to the actual temperature of the indoor unit coil of the air conditioner so that the actual temperature of the indoor unit coil is greater than or equal to the fourth target temperature includes:
when the actual temperature of the indoor unit coil is lower than the fourth target temperature, reducing the opening degree of the electronic expansion valve so that the actual temperature of the indoor unit coil is higher than or equal to the fourth target temperature;
when the opening degree of the electronic expansion valve is reduced to a fourth preset opening degree, if the actual temperature of the inner machine coil is still lower than the fourth target temperature, the frequency of the compressor is increased until the actual temperature of the inner machine coil is higher than or equal to the fourth target temperature.
In the invention, when the air conditioner is in a heating mode, if the actual temperature of the coil pipe of the inner machine is lower than the fourth target temperature, the pressure of the refrigerant of the inner machine can be increased by reducing the opening degree of the electronic expansion valve, so that the evaporation temperature is increased, and the purpose of increasing the actual temperature of the coil pipe of the inner machine is achieved; and when the opening of the electronic expansion valve cannot meet the condition that the actual temperature of the coil of the inner machine is greater than or equal to the fourth target temperature, the frequency of the compressor is adjusted, the refrigerant pressure of the inner machine is increased by increasing the frequency of the compressor, the actual temperature of the coil of the inner machine is increased, and the drying effect of the evaporator is improved.
Further, after the step of cleaning the evaporator in at least one of the frost washing and the water washing, the evaporator cleaning control method further includes:
and sterilizing the evaporator.
In the invention, after the evaporator is cleaned in at least one of the two cleaning modes of frost cleaning and water cleaning, the evaporator is sterilized, so that fresh air without peculiar smell and bacteria can be effectively blown out during the operation of the air conditioner, and the user experience is improved.
Further, the air conditioner further comprises an ultraviolet lamp, and the step of sterilizing the evaporator comprises:
controlling the ultraviolet lamp to be turned on to irradiate the evaporator so as to sterilize the evaporator.
In the invention, the evaporator is sterilized by the irradiation of the ultraviolet lamp, so that the air conditioner blows out bacteria-free fresh air, and the user experience is improved.
The invention also provides an evaporator cleaning control device, which is applied to an air conditioner, wherein the air conditioner comprises an evaporator, and the evaporator cleaning control device comprises:
the cleaning control module is used for cleaning the evaporator in at least one cleaning mode of frost cleaning and water cleaning when the air conditioner enters a self-cleaning mode;
the water quantity obtaining module is used for obtaining the total water quantity generated in the cleaning process after the air conditioner exits the self-cleaning mode;
and the cleaning period determining module is used for determining the next cleaning time period of the evaporator according to the total water amount.
The invention also provides an air conditioner, which comprises a controller and a memory for storing a computer program, wherein the computer program is read by the controller and runs to realize the evaporator cleaning control method.
Drawings
Fig. 1 is a schematic diagram of the components of an air conditioner provided by the present invention.
Fig. 2 is a schematic flow chart of an evaporator cleaning control method provided by the invention.
Fig. 3 is a schematic diagram of the sub-steps of step S11 in fig. 2.
Fig. 4 is a schematic flow chart of another evaporator cleaning control method provided by the invention.
Fig. 5 is a schematic flow chart of another evaporator cleaning control method provided by the invention.
FIG. 6 is a functional block diagram of an evaporator cleaning control device provided by the present invention.
FIG. 7 is a sub-block schematic diagram of the purge control module of FIG. 6.
FIG. 8 is a schematic diagram of another functional block of the evaporator cleaning control device provided by the present invention.
Description of reference numerals: 100-an air conditioner; 200-an evaporator cleaning control device; 110-a controller; 120-a memory; 130-an evaporator; 140-a compressor; 150-electronic expansion valve; 160-coil temperature sensor; 170-ultraviolet lamp; 180-water flow meter; 21-a cleaning control module; 22-a water quantity obtaining module; 23-a cleaning cycle determination module; 211-frosting control module; 212-a defrost control module; 213-condensation control module; 201-drying control module; 202-sterilization control module.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
The method and apparatus for controlling evaporator cleaning according to the embodiments of the present invention can be applied to the air conditioner 100 shown in fig. 1. The air conditioner 100 includes a controller 110, a memory 120, an evaporator 130, a compressor 140, an electronic expansion valve 150, a coil temperature sensor 160, an ultraviolet lamp 170 and a water flow meter 180, wherein the memory 120, the evaporator 130, the compressor 140, the electronic expansion valve 150, the coil temperature sensor 160, the ultraviolet lamp 170 and the water flow meter 180 are all electrically connected to the controller 110.
In this embodiment, the coil temperature sensor 160 is preferably disposed at an indoor unit coil of the air conditioner 100, and is configured to detect an indoor unit coil temperature of the air conditioner 100 in real time and feed back the indoor unit coil temperature to the controller 110; the ultraviolet lamp 170 is preferably disposed at a position where the entire evaporator 130 can be irradiated, and when the ultraviolet lamp 170 is turned on, the evaporator 130 can be sterilized; the water flow meter 180 is preferably provided on a drain pipe of the air conditioner 100, and is used to calculate the total amount of water generated during the entire washing process and feed back the total amount of water to the controller 110 when the air conditioner 100 enters the self-cleaning mode.
Fig. 2 is a flowchart illustrating an evaporator cleaning control method according to an embodiment of the present invention. It should be noted that the evaporator cleaning control method according to the present invention is not limited to the specific sequence shown in fig. 2 and described below. It should be understood that in other embodiments, the order of some steps in the evaporator cleaning control method according to the present invention may be interchanged according to actual needs, or some steps may be omitted or deleted. The evaporator cleaning control method can be applied to the controller 110, and the specific process shown in fig. 2 will be described in detail below.
And step S11, when the air conditioner enters the self-cleaning mode, cleaning the evaporator in at least one cleaning mode of frost cleaning and water cleaning.
In this embodiment, the air conditioner 100 may be configured to enter the self-cleaning mode after the accumulated cooling operation time H0 (e.g., H0 ═ 240 hours), that is, the preset cleaning time period of the air conditioner 100 is H0. When the air conditioner 100 runs for H hours (H is more than or equal to H0) in an accumulative manner, the air conditioner 100 meets the condition of self-cleaning, the controller 110 controls the self-cleaning indicator lamp to be turned on, and after the self-cleaning indicator lamp is turned on, a user can control the air conditioner 100 to start the self-cleaning mode through a remote controller key.
In this embodiment, the frost washing refers to frosting on the surface of the evaporator 130, and the frost melts into water to take away dust on the surface of the evaporator 130, so as to achieve the purpose of cleaning the evaporator 130; the water washing means that dust on the surface of the evaporator 130 is carried away by condensed water generated on the surface of the evaporator 130, thereby achieving the purpose of washing the evaporator 130.
It is understood that the evaporator 130 may be cleaned by a single cleaning method of frost washing or water washing, or by two cleaning methods of frost washing and water washing, wherein in this embodiment, the cleaning process of the evaporator 130 is mainly described by taking two cleaning methods of frost washing and water washing as an example. As shown in fig. 3, the step S11 includes the following sub-steps:
and a substep S111 of controlling the surface of the evaporator to frost.
In this embodiment, the substep S111 may include: in the cooling mode, the opening degree of the electronic expansion valve 150 and/or the frequency of the compressor 140 are/is adjusted according to the actual temperature of the indoor unit coil of the air conditioner 100, so that the actual temperature of the indoor unit coil is less than or equal to a first target temperature; and when the actual temperature of the coil of the internal machine is less than or equal to the first target temperature, controlling the air conditioner 100 to operate for a first preset time so as to frost the surface of the evaporator 130.
When the actual temperature of the indoor unit coil is higher than the first target temperature, the opening degree of the electronic expansion valve 150 is decreased, so that the actual temperature of the indoor unit coil is lower than or equal to the first target temperature; when the opening degree of the electronic expansion valve 150 is decreased to a first preset opening degree, if the actual temperature of the indoor unit coil is still greater than the first target temperature, the frequency of the compressor 140 is increased until the actual temperature of the indoor unit coil is less than or equal to the first target temperature.
Specifically, when the surface of the evaporator 130 needs to be frosted, the controller 110 controls the air conditioner 100 to operate the cooling mode, assuming that the first target temperature is T1 (the value range of T1 may be-12 ℃ to-10 ℃, preferably-10 ℃), the opening degree of the electronic expansion valve 150 is a1 (the value range of a1 may be 60pls to 100pls, the initial value is 100pls), the frequency of the compressor 140 is B1 (the value range of B1 may be 50Hz to 60Hz, the initial value is 50Hz), the controller 110 obtains the actual temperature T of the indoor unit coil fed back by the coil temperature sensor 160 in real time, and adjusts the opening degree a1 of the electronic expansion valve 150 or the frequency B1 of the compressor 140 according to the actual temperature T of the indoor unit coil, so that the actual temperature T of the indoor unit coil meets: t is less than or equal to T1.
For example, when T > T1, the controller 110 may decrease the opening a1 of the electronic expansion valve 150 from an initial value, and when the opening a1 of the electronic expansion valve 150 decreases, the pressure of the internal refrigerant decreases, and the evaporation temperature decreases accordingly, so that the actual temperature T of the internal coil is less than or equal to T1; when the opening a1 of the electronic expansion valve 150 is decreased to 60pls (i.e., the first preset opening mentioned above) and still cannot satisfy T ≦ T1, the controller 110 starts to adjust the frequency B1 of the compressor 140, increases the frequency B1 of the compressor 140 from the initial value, and when the frequency B1 of the compressor 140 is increased, the pressure of the internal refrigerant can also be decreased, so as to decrease the actual temperature T of the internal coil, and make the actual temperature T of the internal coil satisfy T ≦ T1. It can be understood that when the actual temperature T of the inner coil obtained by the controller 110 satisfies T ≦ T1, the opening a1 of the electronic expansion valve 150 is unchanged, and the frequency B1 of the compressor 140 is also unchanged.
When the actual temperature T of the indoor unit coil is equal to or less than T1, the controller 110 needs to control the air conditioner 100 to operate for a first preset time X1 under the condition that the actual temperature T of the indoor unit coil is equal to or less than T1, so that the surface of the evaporator 130 is frosted. Wherein, the value range of the first preset time X1 may be 8min to 10 min.
And a substep S112 of controlling the frost melting on the evaporator.
In this embodiment, after the frost formation on the surface of the evaporator 130 is completed, the controller 110 needs to control the frost on the surface of the evaporator 130 to melt. The substep S112 may comprise: in the cooling mode, the opening degree of the electronic expansion valve 150 and/or the frequency of the compressor 140 are/is adjusted according to the actual temperature of the indoor unit coil of the air conditioner 100, so that the actual temperature of the indoor unit coil is greater than or equal to a second target temperature; and when the actual temperature of the coil of the internal machine is greater than or equal to the second target temperature, controlling the air conditioner 100 to operate for a second preset time so as to melt the frost on the evaporator 130.
When the actual temperature of the inner machine coil is lower than the second target temperature, increasing the opening degree of the electronic expansion valve 150 to make the actual temperature of the inner machine coil higher than or equal to the second target temperature; when the opening degree of the electronic expansion valve 150 is increased to a second preset opening degree, if the actual temperature of the indoor unit coil is still less than the second target temperature, the frequency of the compressor 140 is decreased until the actual temperature of the indoor unit coil is greater than or equal to the second target temperature.
Specifically, when the evaporator 130 enters a defrosting process, the air conditioner 100 still operates in a cooling mode, assuming that the second target temperature is T2 (the value range of T2 may be 8 ℃ to 12 ℃, and is preferably 10 ℃), the opening degree of the electronic expansion valve 150 is a2 (the value range of a2 may be 120pls to 240pls, and the initial value is a1, that is, the opening degree corresponding to the electronic expansion valve 150 when the evaporator 130 finishes frosting), the frequency of the compressor 140 is B2 (the value range of B2 may be 30Hz to 40Hz, and the initial value is B1, that is, the frequency corresponding to the compressor 140 when the evaporator 130 finishes frosting), the controller 110 obtains the actual coil temperature T fed back by the coil temperature sensor 160 in real time, and adjusts the opening degree a2 of the electronic expansion valve 150 or the frequency B2 of the compressor 140 according to the actual coil temperature T of the internal unit, so that the actual coil temperature T of the internal unit meets: t is more than or equal to T2.
For example, when T < T2, the controller 110 may increase the opening a2 of the electronic expansion valve 150 from an initial value, and when the opening a2 of the electronic expansion valve 150 increases, the pressure of the internal refrigerant increases and the evaporation temperature increases, so that the actual temperature T of the coil of the internal refrigerant is greater than or equal to T2; when the opening a2 of the electronic expansion valve 150 increases to 240pls (i.e., the second preset opening) and still fails to satisfy T ≧ T2, the controller 110 starts adjusting the frequency B2 of the compressor 140, starts decreasing the frequency B2 of the compressor 140 from an initial value, and when the frequency B2 of the compressor 140 decreases, the pressure of the internal refrigerant can also be increased, so as to increase the actual temperature T of the internal coil, so that the actual temperature T of the internal coil satisfies T ≧ T2. It can be understood that when the actual temperature T of the inner coil obtained by the controller 110 satisfies T ≧ T2, the opening a2 of the electronic expansion valve 150 is unchanged, and the frequency B2 of the compressor 140 is also unchanged.
When the actual temperature T of the indoor unit coil is greater than or equal to T2, the controller 110 needs to control the air conditioner 100 to operate for a second preset time X2 under the condition that the actual temperature T of the indoor unit coil is greater than or equal to T2, so that the frost on the evaporator 130 is melted completely. Wherein, the value range of the second preset time X2 may be 1min to 1.5 min.
And a substep S113 of controlling the surface of the evaporator to generate condensed water.
In this embodiment, after the frost on the evaporator 130 is melted, the controller 110 controls the evaporator 130 to enter a condensed water washing process. The substep S113 may include: in the cooling mode, the opening degree of the electronic expansion valve 150 and/or the frequency of the compressor 140 are/is adjusted according to the actual temperature of the indoor unit coil of the air conditioner 100, so that the actual temperature of the indoor unit coil is less than or equal to a third target temperature; and when the actual temperature of the coil of the internal machine is less than or equal to the third target temperature, controlling the air conditioner 100 to operate for a third preset time so as to generate condensed water on the surface of the evaporator 130.
When the actual temperature of the indoor unit coil is higher than the third target temperature, the opening degree of the electronic expansion valve 150 is decreased, so that the actual temperature of the indoor unit coil is lower than or equal to the third target temperature; when the opening degree of the electronic expansion valve 150 is decreased to a third preset opening degree, if the actual temperature of the indoor unit coil is still greater than the third target temperature, the frequency of the compressor 140 is increased until the actual temperature of the indoor unit coil is less than or equal to the third target temperature.
Specifically, when the evaporator 130 enters the condensed water cleaning process, the air conditioner 100 still needs to operate in the cooling mode, assuming that the third target temperature is T3 (the value range of T3 may be 2 ℃ to 6 ℃, and is preferably 4 ℃), the opening degree of the electronic expansion valve 150 is A3 (the value range of A3 may be 100pls to 180pls, and the initial value is a2, that is, the opening degree corresponding to the electronic expansion valve 150 when the defrosting of the evaporator 130 is completed), the frequency of the compressor 140 is B3 (the value range of B3 may be 40Hz to 50Hz, and the initial value is B2, that is, the frequency corresponding to the compressor 140 when the defrosting of the evaporator 130 is completed), the controller 110 obtains the actual temperature T of the indoor unit coil fed back by the coil temperature sensor 160 in real time, and adjusting the opening degree a3 of the electronic expansion valve 150 or the frequency B3 of the compressor 140 according to the actual temperature T of the inner machine coil, so that the actual temperature T of the inner machine coil satisfies: t is less than or equal to T3.
For example, when T > T3, the controller 110 may decrease the opening A3 of the electronic expansion valve 150 from an initial value, and when the opening A3 of the electronic expansion valve 150 decreases, the pressure of the internal refrigerant decreases, and the evaporation temperature decreases accordingly, so that the actual temperature T of the internal coil is less than or equal to T3; when the opening a3 of the electronic expansion valve 150 is decreased to 100pls (i.e., the third predetermined opening) and still cannot satisfy T ≦ T3, the controller 110 starts to adjust the frequency B3 of the compressor 140, increases the frequency B3 of the compressor 140 from the initial value, and decreases the pressure of the internal refrigerant when the frequency B3 of the compressor 140 is increased, so as to decrease the actual temperature T of the internal coil, and make the actual temperature T of the internal coil satisfy T ≦ T3. It can be understood that when the actual temperature T of the inner coil obtained by the controller 110 satisfies T ≦ T3, the opening A3 of the electronic expansion valve 150 is unchanged, and the frequency B3 of the compressor 140 is also unchanged.
When the actual temperature T of the indoor unit coil is equal to or less than T3, the controller 110 needs to control the air conditioner 100 to operate for a third preset time X3 under the condition that the actual temperature T of the indoor unit coil is equal to or less than T3, so that a lot of condensed water is formed on the surface of the evaporator 130, and the evaporator 130 is cleaned by the condensed water. Wherein, the third preset time X3 can range from 4min to 6 min.
It should be noted that, in practical applications, when the evaporator 130 is cleaned, the evaporator may be cleaned by first defrosting and then cleaned by using the condensed water, or may be cleaned by using the condensed water and then cleaned by defrosting, which is not limited in this application.
And step S12, after the air conditioner exits the self-cleaning mode, acquiring the total water amount generated in the cleaning process.
In this embodiment, when the evaporator 130 is cleaned, the air conditioner 100 exits the self-cleaning mode, and the controller 110 obtains the total amount Q of water generated in the cleaning process from the water flow meter 180. It is understood that the total water amount Q is the amount of water detected by the water flow meter 180 during the period from when the air conditioner 100 enters the self-cleaning mode to when it exits the self-cleaning mode, which may include the amount of water generated during the frost wash and/or water wash, depending on the actual washing manner employed.
And step S13, determining the next cleaning time period of the evaporator according to the total water amount.
In this embodiment, the next cleaning time period can be understood as the interval time between two adjacent cleaning of the evaporator 130, and when the total amount Q of water generated in the cleaning process is more, the cleaning effect is better; the smaller the total water amount Q, the poor cleaning effect was indicated. Therefore, the more the total water amount Q is, the longer the next washing time period determined according to the total water amount Q is; the smaller the total water amount Q is, the shorter the next cleaning time period determined based on the total water amount Q is.
That is, the controller 110 can determine the cleaning effect of the evaporator 130 each time through the total water amount Q, and when the total water amount Q is large, it indicates that the cleaning effect of the evaporator 130 is good, and the next cleaning can be performed at a longer interval, so that the next cleaning time period determined according to the total water amount is longer; when the total water quantity Q is less, it indicates that the cleaning effect of the evaporator 130 is poor, and the next cleaning needs to be performed at a short interval, so that the evaporator 130 is kept clean for a long time, and the growth of bacteria is avoided.
Specifically, if the total water amount Q satisfies: if Q is more than or equal to Q0, determining the next cleaning time period H of the evaporator 130 to be H0, wherein Q0 is the preset total water amount, and H0 is the preset cleaning time period; if the total water quantity Q satisfies: when Q is more than or equal to K1 × Q0 and less than Q0, determining a next cleaning time period H of the evaporator 130 to be T1 × H0, wherein K1 is a first set value and T1 is a second set value; if the total water quantity Q satisfies: when K2 × Q0 is not greater than Q < K1 × Q0, determining a next cleaning time period H-T2 × H0 of the evaporator 130, where K2 is a third set value and T2 is a fourth set value; if the total water quantity Q satisfies: when K3 × Q0 is not greater than Q < K2 × Q0, determining a next cleaning time period H-T3 × H0 of the evaporator 130, where K3 is a fifth set value and T3 is a sixth set value; if the total water quantity Q satisfies: and Q is more than or equal to 0 and less than K3 and Q0, determining the next cleaning time period H-T4 and H0 of the evaporator 130, wherein T4 is a seventh set value. The first setting K1 may be 0.8, the second setting K2 may be 0.9, the third setting K2 may be 0.5, the fourth setting T2 may be 0.6, the fifth setting K3 may be 0.3, the sixth setting T3 may be 0.4, and the seventh setting T4 may be 0.1.
Alternatively, as shown in fig. 4, since the evaporator 130 has a relatively wet surface after the washing is completed by the frost washing and/or the water washing, and the wet environment is prone to breeding many bacteria, after step S11, the evaporator washing control method may further include:
and step S101, drying the evaporator.
In this embodiment, the step S101 may include: in the heating mode, the opening degree of the electronic expansion valve 150 and/or the frequency of the compressor 140 are/is adjusted according to the actual temperature of the indoor unit coil of the air conditioner 100, so that the actual temperature of the indoor unit coil is greater than or equal to a fourth target temperature; and when the actual temperature of the coil of the internal machine is greater than or equal to the fourth target temperature, controlling the air conditioner 100 to operate for a fourth preset time to dry the moisture on the surface of the evaporator 130.
When the actual temperature of the indoor unit coil is lower than the fourth target temperature, the opening degree of the electronic expansion valve 150 is reduced, so that the actual temperature of the indoor unit coil is higher than or equal to the fourth target temperature; when the opening degree of the electronic expansion valve 150 is decreased to a fourth preset opening degree, if the actual temperature of the indoor unit coil is still less than the fourth target temperature, the frequency of the compressor 140 is increased until the actual temperature of the indoor unit coil is greater than or equal to the fourth target temperature.
Specifically, when the evaporator 130 is dried, the controller 110 needs to switch the operation mode of the air conditioner 100 to the heating mode, assuming that the fourth target temperature is T4 (the value range of T4 may be 35 ℃ to 45 ℃, preferably 40 ℃), the opening degree of the electronic expansion valve 150 is a4 (the value range of a4 may be 80pls to 160pls, and the initial value is A3, that is, the opening degree corresponding to the electronic expansion valve 150 when the evaporator 130 is completely cleaned with condensed water), the frequency of the compressor 140 is B4 (the value range of B4 may be 40Hz to 60Hz, and the initial value is B3, that is, the frequency corresponding to the compressor 140 when the evaporator 130 is completely cleaned with condensed water), the controller 110 obtains the actual temperature T of the indoor unit coil fed back by the coil temperature sensor 160 in real time, and adjusting the opening degree a4 of the electronic expansion valve 150 or the frequency B4 of the compressor 140 according to the actual temperature T of the inner machine coil, so that the actual temperature T of the inner machine coil satisfies: t is more than or equal to T4.
For example, when T < T4, the controller 110 may decrease the opening a4 of the electronic expansion valve 150 from an initial value, and when the opening a4 of the electronic expansion valve 150 decreases, the pressure of the internal refrigerant increases and the evaporation temperature increases, so that the actual temperature T of the coil of the internal refrigerant is greater than or equal to T4; when the opening a4 of the electronic expansion valve 150 is decreased to 80pls (i.e., the fourth preset opening) and still cannot satisfy T ≧ T4, the controller 110 starts adjusting the frequency B4 of the compressor 140, starts increasing the frequency B4 of the compressor 140 from an initial value, and when the frequency B4 of the compressor 140 is increased, the pressure of the internal refrigerant is increased, so as to increase the actual temperature T of the internal coil, so that the actual temperature T of the internal coil satisfies T ≧ T4. It can be understood that when the actual temperature T of the inner coil obtained by the controller 110 satisfies T ≧ T4, the opening a4 of the electronic expansion valve 150 is unchanged, and the frequency B4 of the compressor 140 is also unchanged.
When the actual temperature T of the indoor unit coil is greater than or equal to T4, the controller 110 needs to control the air conditioner 100 to operate for a fourth preset time X4 under the condition that the actual temperature T of the indoor unit coil is greater than or equal to T4, so as to dry the moisture on the surface of the evaporator 130. Wherein, the value range of the fourth preset time X4 may be 6min to 8 min. It should be noted that, in practical application, the controller 110 may close the compressor 140 after the air conditioner 100 operates for 4 to 5 minutes, then operate for 2 to 3 minutes, and use the low wind level to blow the waste heat, thereby improving the user experience.
Alternatively, as shown in fig. 5, after step S11, the evaporator cleaning control method may further include:
and step S102, sterilizing the evaporator.
In this embodiment, the step S102 specifically includes: the ultraviolet lamp 170 is controlled to be turned on to irradiate the evaporator 130, thereby performing a sterilization process on the evaporator 130.
It should be noted that step S102 may be executed after step S101, or may be executed simultaneously with step S101, which is not limited in the present application. That is, in practical use, the drying and sterilization of the evaporator 130 may be performed at the same time. For example, the controller 110 controls the air conditioner 100 to operate for a fourth preset time X4 in a state that the actual temperature T of the coil of the internal machine is greater than or equal to T4, and simultaneously turns on the ultraviolet lamp 170, the evaporator 130 is irradiated and sterilized by the ultraviolet lamp 170, and after the moisture on the surface of the evaporator 130 is dried, the controller 110 controls the air conditioner 100 to exit the self-cleaning mode. So, through carrying out drying process and bactericidal treatment to evaporimeter 130, can further improve the degerming effect, can blow out no peculiar smell, no bacterium new trend effectively when having guaranteed air conditioner 100 operation, improved user experience.
Next, an example is given to explain each step shown in fig. 5 in detail. Assuming that the current air conditioner 100 accumulates the cooling operation time H as 250 hours (H > H0), the self-cleaning condition is satisfied, and the user turns on the self-cleaning mode through the remote controller. After the air conditioner 100 enters the self-cleaning mode and operates in the cooling mode, the controller 110 adjusts the opening degree of the electronic expansion valve 150 to 75pls, the frequency of the compressor 140 is increased to 55Hz, and after the air conditioner operates for 10min, the evaporator 130 is frosted. In the cooling mode, the controller 110 adjusts the opening degree of the electronic expansion valve 150 to 200pls, adjusts the frequency of the compressor 140 to 35Hz, and defrosts after operating for 1 min. In the cooling mode, the controller 110 adjusts the opening degree of the electronic expansion valve 150 to 120pls and the frequency of the compressor 140 to 45Hz, and after 5min of operation, much condensed water is formed on the surface of the evaporator 130. The controller 110 switches the air conditioner 100 from the cooling mode to the heating mode, adjusts the opening of the electronic expansion valve 150 to 105pls, adjusts the frequency of the compressor 140 to 45Hz, and simultaneously turns on the ultraviolet lamp 170 to blow the residual heat for 8min, so as to kill bacteria and complete the self-cleaning degerming process.
Therefore, in the embodiment, the evaporator 130 is washed twice by the frost washing and the condensed water washing, so that the cleaning effect of the evaporator 130 is effectively improved, and meanwhile, in the self-cleaning process, bacteria are eliminated by the ultraviolet lamp 170, so that the breeding of the bacteria is effectively prevented; after the air conditioner 100 exits from the self-cleaning mode, the total water amount generated in the process of cleaning the evaporator 130 is calculated, and the next cleaning time period is determined according to the total water amount, because the total water amount generated in the cleaning process of the evaporator 130 can reflect the cleaning effect of the evaporator 130, namely, when the generated total water amount is more, the cleaning effect of the evaporator 130 is better, when the generated total water amount is less, the cleaning effect of the evaporator 130 is poorer, so that the next cleaning time period of the evaporator 130 is determined according to the total water amount, the evaporator 130 can be kept in a clean state for a long time, the breeding of bacteria is effectively avoided, no peculiar smell and no bacteria fresh air can be blown out when the air conditioner 100 operates, and the user experience is improved.
Fig. 6 is a schematic functional block diagram of an evaporator cleaning control apparatus 200 according to an embodiment of the present invention. It should be noted that the basic principle and the technical effects of the evaporator cleaning control device 200 according to the embodiment of the present invention are the same as those of the foregoing method embodiment, and for the sake of brief description, the corresponding contents of the foregoing method embodiment can be referred to for the parts not mentioned in this embodiment. The evaporator cleaning control device 200 can be applied to the controller 110, and includes a cleaning control module 21, a water amount obtaining module 22, and a cleaning period determining module 23.
The washing control module 21 is configured to wash the evaporator 130 in at least one of a frost washing and a water washing when the air conditioner 100 enters the self-cleaning mode.
It is understood that the washing control module 21 may perform the above step S11.
Alternatively, as shown in fig. 7, the cleaning control module 21 includes a frosting control module 211, a defrosting control module 212, and a condensing control module 213.
The frost control module 211 is used to control the surface of the evaporator 130 to frost.
The frosting control module 211 is configured to, in a cooling mode, adjust an opening degree of the electronic expansion valve 150 and/or a frequency of the compressor 140 according to an actual temperature of an internal coil of the air conditioner 100, so that the actual temperature of the internal coil is less than or equal to a first target temperature; and when the actual temperature of the coil of the internal machine is less than or equal to the first target temperature, controlling the air conditioner 100 to operate for a first preset time so as to frost the surface of the evaporator 130.
Specifically, the frosting control module 211 is configured to reduce the opening degree of the electronic expansion valve 150 when the actual temperature of the internal machine coil is greater than the first target temperature, so that the actual temperature of the internal machine coil is less than or equal to the first target temperature; when the opening degree of the electronic expansion valve 150 is decreased to a first preset opening degree, if the actual temperature of the indoor unit coil is still greater than the first target temperature, the frequency of the compressor 140 is increased until the actual temperature of the indoor unit coil is less than or equal to the first target temperature.
It is understood that the frosting control module 211 may perform the above substep S111.
The defrosting control module 212 is used for controlling the frost melting on the evaporator 130.
The defrosting control module 212 is configured to, in a cooling mode, adjust an opening degree of the electronic expansion valve 150 and/or a frequency of the compressor 140 according to an actual temperature of an internal coil of the air conditioner 100, so that the actual temperature of the internal coil is greater than or equal to a second target temperature; and when the actual temperature of the coil of the internal machine is greater than or equal to the second target temperature, controlling the air conditioner 100 to operate for a second preset time so as to melt the frost on the evaporator 130.
Specifically, the defrosting control module 212 is configured to increase the opening degree of the electronic expansion valve 150 when the actual temperature of the internal unit coil is lower than the second target temperature, so that the actual temperature of the internal unit coil is higher than or equal to the second target temperature; when the opening degree of the electronic expansion valve 150 is increased to a second preset opening degree, if the actual temperature of the indoor unit coil is still less than the second target temperature, the frequency of the compressor 140 is decreased until the actual temperature of the indoor unit coil is greater than or equal to the second target temperature.
It is understood that the defrosting control module 212 may perform the sub-step S112 described above.
The condensation control module 213 is used to control the surface of the evaporator 130 to generate condensed water.
The condensation control module 213 is configured to, in a cooling mode, adjust the opening degree of the electronic expansion valve 150 and/or the frequency of the compressor 140 according to the actual temperature of the indoor unit coil of the air conditioner 100, so that the actual temperature of the indoor unit coil is less than or equal to a third target temperature; and when the actual temperature of the coil of the internal machine is less than or equal to the third target temperature, controlling the air conditioner 100 to operate for a third preset time so as to generate condensed water on the surface of the evaporator 130.
Specifically, the condensation control module 213 is configured to decrease the opening degree of the electronic expansion valve 150 when the actual temperature of the internal machine coil is greater than the third target temperature, so that the actual temperature of the internal machine coil is less than or equal to the third target temperature; when the opening degree of the electronic expansion valve 150 is decreased to a third preset opening degree, if the actual temperature of the indoor unit coil is still greater than the third target temperature, the frequency of the compressor 140 is increased until the actual temperature of the indoor unit coil is less than or equal to the third target temperature.
It is understood that the condensation control module 213 may perform the above substep S113.
The water amount obtaining module 22 is used for obtaining the total amount of water generated in the washing process after the air conditioner 100 exits the self-cleaning mode.
In this embodiment, the water amount obtaining module 22 may obtain the total water amount Q generated in the cleaning process from the water flow meter 180.
It is understood that the water amount obtaining module 22 may perform the step S12.
The cleaning cycle determining module 23 is configured to determine a next cleaning time cycle of the evaporator 130 according to the total water amount.
When the total water amount Q is more, the cleaning period determining module 23 determines that the next cleaning time period according to the total water amount is longer; the smaller the total water amount Q is, the shorter the next cleaning time period determined by the cleaning period determination module 23 based on the total water amount Q is.
Specifically, the cleaning cycle determining module 23 is configured to, if the total water amount Q satisfies: if Q is more than or equal to Q0, determining the next cleaning time period H of the evaporator 130 to be H0, wherein Q0 is the preset total water amount, and H0 is the preset cleaning time period; if the total water quantity Q satisfies: when Q is more than or equal to K1 × Q0 and less than Q0, determining a next cleaning time period H of the evaporator 130 to be T1 × H0, wherein K1 is a first set value and T1 is a second set value; if the total water quantity Q satisfies: when K2 × Q0 is not greater than Q < K1 × Q0, determining a next cleaning time period H-T2 × H0 of the evaporator 130, where K2 is a third set value and T2 is a fourth set value; if the total water quantity Q satisfies: when K3 × Q0 is not greater than Q < K2 × Q0, determining a next cleaning time period H-T3 × H0 of the evaporator 130, where K3 is a fifth set value and T3 is a sixth set value; if the total water quantity Q satisfies: and Q is more than or equal to 0 and less than K3 and Q0, determining the next cleaning time period H-T4 and H0 of the evaporator 130, wherein T4 is a seventh set value.
It is understood that the wash cycle determination module 23 may perform the above-described step S13.
Optionally, as shown in fig. 8, the evaporator cleaning control device 200 may further include a drying control module 201 and a sterilization control module 202.
The drying control module 201 is configured to perform a drying process on the evaporator 130.
The drying control module 201 is configured to, in the heating mode, adjust the opening degree of the electronic expansion valve 150 and/or the frequency of the compressor 140 according to the actual temperature of the indoor unit coil of the air conditioner 100, so that the actual temperature of the indoor unit coil is greater than or equal to a fourth target temperature; and when the actual temperature of the coil of the internal machine is greater than or equal to the fourth target temperature, controlling the air conditioner 100 to operate for a fourth preset time to dry the moisture on the surface of the evaporator 130.
Specifically, the drying control module 201 is configured to reduce the opening degree of the electronic expansion valve 150 when the actual temperature of the indoor unit coil is lower than the fourth target temperature, so that the actual temperature of the indoor unit coil is greater than or equal to the fourth target temperature; when the opening degree of the electronic expansion valve 150 is decreased to a fourth preset opening degree, if the actual temperature of the indoor unit coil is still less than the fourth target temperature, the frequency of the compressor 140 is increased until the actual temperature of the indoor unit coil is greater than or equal to the fourth target temperature.
It is understood that the drying control module 201 may perform the above step S101.
The sterilization control module 202 is used for performing sterilization treatment on the evaporator 130.
In this embodiment, the sterilization control module 202 is specifically configured to control the ultraviolet lamp 170 to be turned on to irradiate the evaporator 130, so as to perform a sterilization process on the evaporator 130.
It is understood that the sterilization control module 202 may perform the above step S102.
It is understood that the above-mentioned washing control module 21, drying control module 201, sterilization control module 202, water amount obtaining module 22 and washing period determining module 23 may be software function modules and computer programs stored in the memory 120, and may be executed by the controller 110.
In summary, according to the evaporator cleaning control method, the evaporator cleaning control device and the air conditioner provided by the invention, when the air conditioner enters the self-cleaning mode, the evaporator is cleaned in at least one cleaning mode of frost cleaning and water cleaning; after the air conditioner exits the self-cleaning mode, acquiring the total water amount generated in the cleaning process; and determining the next cleaning time period of the evaporator according to the total water amount. After the air conditioner enters a self-cleaning mode, the evaporator is cleaned by adopting at least one of two cleaning modes of frost cleaning and water cleaning, so that dust on the surface of the evaporator can be effectively cleaned, and the cleaning effect of the evaporator is improved; after the air conditioner exits from the self-cleaning mode, the total water amount generated in the process of cleaning the evaporator is calculated, the next cleaning time period is determined according to the total water amount, the cleaning effect of the evaporator can be reflected according to the total water amount generated in the cleaning process of the evaporator, namely, the total water amount generated is more, the cleaning effect of the evaporator is better, the total water amount generated is less, the cleaning effect of the evaporator is poorer, the next cleaning time period of the evaporator is determined according to the total water amount, the evaporator can be kept in a clean state for a long time, the breeding of bacteria is effectively avoided, the cleanness of an air conditioner indoor unit is guaranteed, the air conditioner can blow out fresh air without odor and bacteria when in operation, and the user experience is improved.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (16)

1. An evaporator cleaning control method applied to an air conditioner (100), wherein the air conditioner (100) comprises an evaporator (130), and the method is characterized by comprising the following steps:
washing the evaporator (130) in at least one of a frost wash and a water wash when the air conditioner (100) enters a self-cleaning mode;
acquiring the total water amount generated in the cleaning process after the air conditioner (100) exits the self-cleaning mode; determining a next cleaning time period of the evaporator (130) according to the total water amount; the next cleaning time period is the interval time between two adjacent cleaning of the evaporator (130).
2. The evaporator washing control method according to claim 1, wherein the step of determining a next washing time period of the evaporator (130) according to the total water amount comprises:
the more the total water amount is, the longer the next cleaning time period determined according to the total water amount is; the smaller the total amount of water, the shorter the next cleaning time period determined based on the total amount of water.
3. The evaporator washing control method according to claim 1, wherein the step of washing the evaporator (130) in at least one of a frost wash and a water wash includes:
controlling surface frosting of the evaporator (130);
controlling frost melting on the evaporator (130);
controlling the surface of the evaporator (130) to produce condensed water.
4. The evaporator cleaning control method according to claim 3, wherein the air conditioner (100) further includes a compressor (140) and an electronic expansion valve (150), and the step of controlling the surface frost formation of the evaporator (130) includes:
in a cooling mode, adjusting the opening degree of the electronic expansion valve (150) and/or the frequency of the compressor (140) according to the actual temperature of an inner machine coil of the air conditioner (100) so as to enable the actual temperature of the inner machine coil to be less than or equal to a first target temperature;
and when the actual temperature of the coil of the internal machine is less than or equal to the first target temperature, controlling the air conditioner (100) to operate for a first preset time so as to frost the surface of the evaporator (130).
5. The evaporator cleaning control method according to claim 4, wherein the step of adjusting the opening degree of the electronic expansion valve (150) and/or the frequency of the compressor (140) according to the actual temperature of the indoor unit coil of the air conditioner (100) so that the actual temperature of the indoor unit coil is less than or equal to a first target temperature comprises:
when the actual temperature of the inner machine coil is higher than the first target temperature, reducing the opening degree of the electronic expansion valve (150) so as to enable the actual temperature of the inner machine coil to be lower than or equal to the first target temperature; when the opening degree of the electronic expansion valve (150) is reduced to a first preset opening degree, if the actual temperature of the inner machine coil is still greater than the first target temperature, the frequency of the compressor (140) is increased until the actual temperature of the inner machine coil is less than or equal to the first target temperature.
6. The evaporator cleaning control method according to claim 3, wherein the air conditioner (100) further includes a compressor (140) and an electronic expansion valve (150), and the step of controlling the frost melting on the evaporator (130) includes:
in a cooling mode, adjusting the opening degree of the electronic expansion valve (150) and/or the frequency of the compressor (140) according to the actual temperature of an inner machine coil of the air conditioner (100) so as to enable the actual temperature of the inner machine coil to be larger than or equal to a second target temperature;
and when the actual temperature of the coil of the internal machine is greater than or equal to the second target temperature, controlling the air conditioner (100) to operate for a second preset time so as to melt frost on the evaporator (130).
7. The evaporator cleaning control method according to claim 6, wherein the step of adjusting the opening degree of the electronic expansion valve (150) and/or the frequency of the compressor (140) according to the actual temperature of the indoor unit coil of the air conditioner (100) so that the actual temperature of the indoor unit coil is greater than or equal to the second target temperature comprises:
when the actual temperature of the inner machine coil is lower than the second target temperature, the opening degree of the electronic expansion valve (150) is increased, so that the actual temperature of the inner machine coil is higher than or equal to the second target temperature; when the opening degree of the electronic expansion valve (150) is increased to a second preset opening degree, if the actual temperature of the inner machine coil is still lower than the second target temperature, the frequency of the compressor (140) is reduced until the actual temperature of the inner machine coil is higher than or equal to the second target temperature.
8. The evaporator cleaning control method according to claim 3, wherein the air conditioner (100) further includes a compressor (140) and an electronic expansion valve (150), and the step of controlling the surface of the evaporator (130) to generate condensed water includes:
in a cooling mode, adjusting the opening degree of the electronic expansion valve (150) and/or the frequency of the compressor (140) according to the actual temperature of an inner machine coil of the air conditioner (100) so as to enable the actual temperature of the inner machine coil to be less than or equal to a third target temperature;
and when the actual temperature of the coil of the internal machine is less than or equal to the third target temperature, controlling the air conditioner (100) to operate for a third preset time so as to enable the surface of the evaporator (130) to generate condensed water.
9. The evaporator cleaning control method according to claim 8, wherein the step of adjusting the opening degree of the electronic expansion valve (150) and/or the frequency of the compressor (140) according to the actual temperature of the indoor unit coil of the air conditioner (100) so that the actual temperature of the indoor unit coil is less than or equal to the third target temperature comprises:
when the actual temperature of the inner machine coil is higher than the third target temperature, reducing the opening degree of the electronic expansion valve (150) so as to enable the actual temperature of the inner machine coil to be lower than or equal to the third target temperature; when the opening degree of the electronic expansion valve (150) is reduced to a third preset opening degree, if the actual temperature of the inner machine coil is still higher than the third target temperature, the frequency of the compressor (140) is increased until the actual temperature of the inner machine coil is lower than or equal to the third target temperature.
10. The evaporator washing control method according to any one of claims 1 to 9, wherein after the step of washing the evaporator (130) in at least one of the frost washing and the water washing, the evaporator washing control method further comprises:
and drying the evaporator (130).
11. The evaporator cleaning control method according to claim 10, wherein the air conditioner (100) further includes a compressor (140) and an electronic expansion valve (150), and the step of performing the drying process on the evaporator (130) includes:
in the heating mode, the opening degree of the electronic expansion valve (150) and/or the frequency of the compressor (140) are/is adjusted according to the actual temperature of an internal machine coil of the air conditioner (100), so that the actual temperature of the internal machine coil is greater than or equal to a fourth target temperature;
and when the actual temperature of the coil of the internal machine is greater than or equal to the fourth target temperature, controlling the air conditioner (100) to operate for a fourth preset time so as to dry the moisture on the surface of the evaporator (130).
12. The evaporator cleaning control method according to claim 11, wherein the step of adjusting the opening degree of the electronic expansion valve (150) and/or the frequency of the compressor (140) according to the actual temperature of the indoor unit coil of the air conditioner (100) so that the actual temperature of the indoor unit coil is greater than or equal to the fourth target temperature comprises:
when the actual temperature of the inner machine coil is lower than the fourth target temperature, reducing the opening degree of the electronic expansion valve (150) so as to enable the actual temperature of the inner machine coil to be higher than or equal to the fourth target temperature;
when the opening degree of the electronic expansion valve (150) is reduced to a fourth preset opening degree, if the actual temperature of the inner machine coil is still lower than the fourth target temperature, the frequency of the compressor (140) is increased until the actual temperature of the inner machine coil is higher than or equal to the fourth target temperature.
13. The evaporator washing control method according to any one of claims 1 to 9, wherein after the step of washing the evaporator (130) in at least one of the frost washing and the water washing, the evaporator washing control method further comprises:
sterilizing the evaporator (130).
14. The evaporator washing control method as recited in claim 13, wherein the air conditioner (100) further includes an ultraviolet lamp (170), and the step of sterilizing the evaporator (130) includes:
controlling the ultraviolet lamp (170) to be turned on to irradiate the evaporator (130), thereby sterilizing the evaporator (130).
15. An evaporator cleaning control device applied to an air conditioner (100), the air conditioner (100) including an evaporator (130), characterized in that the evaporator cleaning control device (200) includes:
a washing control module (210) for washing the evaporator (130) in at least one of a frost washing and a water washing when the air conditioner (100) enters a self-cleaning mode;
a water volume obtaining module (220) for obtaining the total water volume generated in the cleaning process after the air conditioner (100) exits the self-cleaning mode;
a cleaning cycle determination module (230) for determining a next cleaning time cycle of the evaporator (130) based on the total water amount; the next cleaning time period is the interval time between two adjacent cleaning of the evaporator (130).
16. An air conditioner, characterized by comprising a controller (110) and a memory (120) storing a computer program, the computer program being readable and executable by the controller (110) to implement the evaporator cleaning control method according to any one of claims 1 to 9.
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