CN110762760A - Self-cleaning control method for air conditioner - Google Patents

Self-cleaning control method for air conditioner Download PDF

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Publication number
CN110762760A
CN110762760A CN201810848779.0A CN201810848779A CN110762760A CN 110762760 A CN110762760 A CN 110762760A CN 201810848779 A CN201810848779 A CN 201810848779A CN 110762760 A CN110762760 A CN 110762760A
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CN
China
Prior art keywords
heat exchanger
self
indoor
indoor heat
cleaning control
Prior art date
Application number
CN201810848779.0A
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Chinese (zh)
Inventor
罗荣邦
许文明
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青岛海尔空调器有限总公司
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Priority to CN201810848779.0A priority Critical patent/CN110762760A/en
Publication of CN110762760A publication Critical patent/CN110762760A/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/30Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41Defrosting; Preventing freezing
    • F24F11/43Defrosting; Preventing freezing of indoor units
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/50Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61Control or safety arrangements characterised by user interfaces or communication using timers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63Electronic processing
    • F24F11/64Electronic processing using pre-stored data
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/70Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/70Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/70Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/85Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using variable-flow pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/70Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30Arrangement or mounting of heat-exchangers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00Control inputs relating to air properties
    • F24F2110/10Temperature
    • F24F2110/12Temperature of the outside air
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The invention belongs to the technical field of air conditioners and aims to solve the problems that the self-cleaning control mode of the existing air conditioner is generally low in frosting speed, so that the whole self-cleaning time is long and the normal experience of a user is influenced. Therefore, the invention provides a self-cleaning control method for an air conditioner, the air conditioner comprises a refrigerant circulating system and a solution circulating system consisting of an indoor solution film, an outdoor solution film, a liquid pump and a liquid storage tank, the self-cleaning control method comprises the following steps: under the heating condition, the compressor is used for reducing the frequency, the four-way valve is used for reversing, the opening degree of the electronic expansion valve is reduced, an indoor fan of the air conditioner is closed, and the rotating speed of the liquid pump is increased, so that the indoor heat exchanger is frosted; after the indoor heat exchanger frosts, the electronic expansion valve is closed firstly, and the electromagnetic valve at the low-pressure side of the compressor is closed after the preset time; and heating the indoor heat exchanger, so that the indoor heat exchanger is defrosted and cleaned. The invention can improve the self-cleaning efficiency of the indoor heat exchanger and improve the user experience.

Description

Self-cleaning control method for air conditioner

Technical Field

The invention belongs to the technical field of air conditioners, and particularly provides a self-cleaning control method for an air conditioner.

Background

The air conditioner is a device capable of refrigerating/heating the room, as time goes on, the dust deposition on the indoor unit and the outdoor unit of the air conditioner can be gradually increased, a large amount of bacteria can be bred after the dust deposition is accumulated to a certain degree, especially, when the indoor air flows through the indoor unit, a large amount of dust and bacteria can be carried, the heat exchange efficiency of the air conditioner can be seriously influenced by the bacteria and the dust, the energy consumption of the air conditioner is increased, the bacteria and the dust can be brought into the room again along with the flowing of the air, the human body is injured, respiratory diseases of people easily occur, and therefore the air conditioner needs to be cleaned in time.

In the prior art, the cleaning mode of the air conditioner comprises manual cleaning and self-cleaning of the air conditioner, time and labor are wasted by adopting the manual cleaning, all parts of the air conditioner need to be disassembled and cleaned, and all the parts need to be reassembled after the cleaning is finished. Therefore, many air conditioners at present adopt a self-cleaning manner, for example, the air conditioner can be self-cleaned by means of frosting and defrosting, however, the existing self-cleaning control manner generally has a slow frosting speed, so that the whole self-cleaning time is long, and the normal experience of users is affected.

Therefore, there is a need in the art for a new self-cleaning control method for an air conditioner to solve the above-mentioned problems.

Disclosure of Invention

In order to solve the above problems in the prior art, i.e. to solve the problem that the self-cleaning control mode of the existing air conditioner is generally slow in frosting speed, thereby causing the problems that the whole self-cleaning time is long and the normal experience of users is influenced, the invention provides a self-cleaning control method for an air conditioner, the air conditioner comprises an indoor heat exchanger, an outdoor heat exchanger, a compressor, an electronic expansion valve and a four-way valve, wherein the indoor heat exchanger, the electronic expansion valve, the outdoor heat exchanger, the compressor and the four-way valve form a closed-loop refrigerant circulating system, the air conditioner also comprises an indoor solution film, an outdoor solution film, a liquid pump and a liquid storage tank, wherein the indoor solution film is arranged on the indoor heat exchanger, the outdoor solution film is arranged on the outdoor heat exchanger, the indoor solution film, the liquid storage tank, the outdoor solution film and the liquid pump form a closed-loop solution circulating system, and the self-cleaning control method comprises the following steps: under the heating condition, the compressor is used for reducing the frequency, the four-way valve is used for reversing, the opening degree of the electronic expansion valve is reduced, an indoor fan of the air conditioner is closed, and the rotating speed of the liquid pump is increased, so that the indoor heat exchanger is frosted; after the indoor heat exchanger frosts, the electronic expansion valve is closed firstly, and the electromagnetic valve at the low-pressure side of the compressor is closed after the preset time; and heating the indoor heat exchanger, so that the indoor heat exchanger is defrosted and cleaned.

In the preferred technical scheme of the self-cleaning control method, the step of increasing the rotation speed of the liquid pump specifically comprises the following steps: the speed of the liquid pump is gradually increased to the maximum speed.

In the preferred technical scheme of the self-cleaning control method, the step of reducing the opening degree of the electronic expansion valve, the step of closing an indoor fan of the air conditioner and the step of increasing the rotating speed of the liquid pump are carried out simultaneously.

In a preferred embodiment of the above self-cleaning control method, the self-cleaning control method further includes, at the same time as or after the step of "heating the indoor heat exchanger", the step of: the indoor fan of the air conditioner is operated at a low speed.

In the preferred technical scheme of the self-cleaning control method, the indoor heat exchanger is provided with an electric heating pipe, and the step of heating the indoor heat exchanger specifically comprises the following steps: the indoor heat exchanger is heated by connecting high voltage to the electric heating pipe.

In the preferred technical scheme of the self-cleaning control method, the liquid pump is a water pump, and the liquid storage tank is a water storage tank.

In a preferred embodiment of the self-cleaning control method, the self-cleaning control method further includes, while the step of reducing the opening of the electronic expansion valve is performed: the compressor is upscaled.

In the preferred technical solution of the above self-cleaning control method, the step of "raising the frequency of the compressor" specifically includes: the frequency of the compressor is gradually increased to the highest frequency.

In a preferred embodiment of the above self-cleaning control method, the self-cleaning control method further includes, while "increasing the rotation speed of the liquid pump": the voltage of the indoor solution membrane and the voltage of the outdoor solution membrane were raised.

In a preferred embodiment of the above self-cleaning control method, the step of "increasing the voltage of the indoor solution film and the voltage of the outdoor solution film" includes: the voltage of the indoor solution membrane and the voltage of the outdoor solution membrane were gradually increased to the highest voltage.

It can be understood by those skilled in the art that in the preferred technical solution of the present invention, under the normal heating condition, the compressor is controlled to reduce the frequency below the frequency allowing the four-way valve to reverse, then the four-way valve reverses to make the air conditioner enter the normal refrigeration condition, then the opening of the electronic expansion valve is controlled to be reduced and the indoor fan of the air conditioner is turned off to make the air conditioner depart from the normal refrigeration condition to start frosting the indoor heat exchanger, and the solution circulation system (hereinafter, the water circulation system is taken as an example) is accelerated to circulate by increasing the rotation speed of the liquid pump (hereinafter, the water pump is taken as an example), so that the water vapor absorbed by the outdoor solution film from the outside can be rapidly delivered to the indoor solution film, and the water vapor can be more rapidly released to the indoor heat exchanger through the indoor solution film, so that the indoor heat exchanger is rapidly humidified, and the indoor heat exchanger, reduce indoor heat exchanger's frosting time, improve frosting efficiency, before defrosting indoor heat exchanger, successively close through the solenoid valve of electronic expansion valve and compressor low pressure side, make the refrigerant in the refrigerant circulation system all retrieve to the off-premises station one side of air conditioner, thereby avoid the refrigerant to produce the influence to subsequent defrosting, can make indoor heat exchanger concentrate, change the frost fast, thereby take away bacterium and dust on the indoor heat exchanger fully, when reaching the clean purpose of indoor heat exchanger, improve the automatically cleaning efficiency to indoor heat exchanger, avoid extravagant too much time and produce too much energy consumption, and then promote user experience.

Furthermore, the rotating speed of the water pump is gradually increased to the highest rotating speed in a short time, namely, in the frosting process of the indoor heat exchanger, the water pump runs at the highest rotating speed, so that the water circulating system circulates at the highest speed, the frosting speed of the indoor heat exchanger is further increased, the frosting time is reduced, the self-cleaning time of the indoor heat exchanger of the air conditioner is integrally reduced, and the self-cleaning efficiency is improved.

Furthermore, in the process of heating and defrosting the indoor heat exchanger or after the process, the defrosting speed of the indoor heat exchanger can be improved to a certain extent by the low-speed operation of the indoor fan of the air conditioner, namely, defrosting is accelerated by blowing the surface of frost through weak wind, so that the self-cleaning time of the indoor heat exchanger of the air conditioner is reduced on the whole, the self-cleaning efficiency is improved, and when the indoor fan is operated at low speed, defrosting water cannot enter the room in a splashing mode, the influence of the defrosting water on the indoor environment is further avoided, and the user experience is further improved.

Furthermore, when the opening of the electronic expansion valve is reduced, the frosting speed of the indoor heat exchanger can be further improved by increasing the frequency of the compressor, and the frosting time is reduced, so that the self-cleaning time of the indoor heat exchanger of the air conditioner is reduced on the whole, and the self-cleaning efficiency is improved.

And furthermore, the frequency of the compressor is gradually increased to the highest frequency in a short time, namely, the compressor is in the highest-frequency operation in the frosting process of the indoor heat exchanger, so that the frosting speed of the indoor heat exchanger is further improved, the frosting time is reduced, the self-cleaning time of the indoor heat exchanger of the air conditioner is integrally reduced, and the self-cleaning efficiency is improved.

And furthermore, the voltage of the indoor solution film and the voltage of the outdoor solution film are increased while the rotating speed of the water pump is increased, namely the outdoor solution film can absorb outdoor water vapor more quickly so as to increase the amount of absorbed water vapor, and the indoor solution film can release more water onto the indoor heat exchanger, so that the indoor heat exchanger is humidified quickly, the indoor heat exchanger is frosted quickly, the frosting time is further reduced, the self-cleaning time of the indoor heat exchanger of the air conditioner is reduced integrally, and the self-cleaning efficiency is improved.

And furthermore, the voltage of the indoor solution film and the voltage of the outdoor solution film are raised to the highest voltage in a short time, namely, in the frosting process of the indoor heat exchanger, the indoor solution film and the outdoor solution film both run at the highest voltage, so that the steam absorption amount of the indoor solution film and the steam absorption amount of the outdoor solution film are both maximized, the indoor solution film reduces the maximum amount of water vapor to the indoor heat exchanger, the humidification amount of the indoor heat exchanger is maximized, the indoor heat exchanger is frosted quickly, the frosting time is further reduced, the self-cleaning time of the indoor heat exchanger of the air conditioner is reduced integrally, and the self-cleaning efficiency is improved.

Drawings

FIG. 1 is a first schematic structural diagram (heating mode) of the air conditioner of the present invention;

FIG. 2 is a schematic structural diagram II of the air conditioner of the present invention (cooling condition);

fig. 3 is a flowchart of a self-cleaning control method of an air conditioner of the present invention;

fig. 4 is a logic control diagram of an embodiment of a self-cleaning control method of an air conditioner of the present invention.

Detailed Description

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "middle", "upper", "lower", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The invention provides a self-cleaning control method for an air conditioner, aiming at improving the self-cleaning efficiency of an indoor heat exchanger, avoiding excessive time waste and excessive energy consumption generation and further improving the user experience.

Specifically, as shown in fig. 1 and 2, the air conditioner of the present invention includes an indoor heat exchanger 1, an outdoor heat exchanger 2, a compressor 3, an electronic expansion valve 4, and a four-way valve 5, where the indoor heat exchanger 1, the electronic expansion valve 4, the outdoor heat exchanger 2, the compressor 3, and the four-way valve 5 form a closed-loop refrigerant circulation system, and the four-way valve 5 is configured to change an operation condition of the air conditioner through reversing, that is, the air conditioner can be changed into a heating condition through reversing the four-way valve 5 under a cooling condition, and the air conditioner can be changed into a cooling condition through reversing the four-way. The air conditioner also comprises an indoor solution film 6, an outdoor solution film 7, a liquid pump 8 and a liquid storage tank 9, wherein the indoor solution film 6 is arranged on the indoor heat exchanger 1, the outdoor solution film 7 is arranged on the outdoor heat exchanger 2, the indoor solution film 6, the liquid storage tank 9, the outdoor solution film 7 and the liquid pump 8 form a closed-loop solution circulating system, it needs to be noted that under a normal refrigeration working condition or a dehumidification working condition, the indoor solution film 6 (also called as an indoor solution dehumidification film) has the function of pre-dehumidifying the inlet air of the indoor machine, namely absorbing indoor water vapor, and the moisture absorbed by the indoor solution film 6 can be circulated to the outdoor solution film 7 for reduction, and the reduced water vapor can cool and radiate the outdoor heat exchanger 2. In the heating condition, the outdoor solution membrane 7 (also referred to as an outdoor solution dehumidification membrane) pre-dehumidifies outdoor intake air, that is, absorbs outdoor water vapor, and water absorbed by the outdoor solution membrane 7 can be circulated to the indoor solution membrane 6 to be reduced, the reduced water vapor can humidify the outdoor heat exchanger 2, water can be reduced to water vapor by supplying electricity to the indoor solution membrane 6 to humidify the indoor heat exchanger 1, and water can be reduced to water vapor by supplying electricity to the outdoor solution membrane 7 to humidify the outdoor heat exchanger 2. According to the invention, the water absorbability and the electrification reducibility of the indoor solution film 6 and the outdoor solution film 7 are fully utilized, so that when the indoor heat exchanger 1 is subjected to self-cleaning, the indoor solution film 6 is electrified to absorb a large amount of indoor water vapor, meanwhile, the outdoor solution film 7 absorbs a large amount of outdoor water vapor, the outdoor water vapor is conveyed to the indoor solution film 6 under the action of the liquid pump 8, and then the water vapor is released to the indoor heat exchanger 1 through the electro-reduction action, so that the frosting of the indoor heat exchanger 1 is realized.

Specifically, as shown in fig. 1 to 3, the self-cleaning control method of the present invention includes: under the heating condition, firstly reducing the frequency of the compressor 3 below the frequency allowing the four-way valve 5 to reverse, then reversing the four-way valve 5 to enable the air conditioner to enter a normal refrigeration working condition, then reducing the opening degree of the electronic expansion valve 4, closing an indoor fan of the air conditioner and increasing the rotating speed of the liquid pump 8, so that the indoor heat exchanger 1 frosts; after the indoor heat exchanger 1 frosts, the electronic expansion valve 4 is closed firstly, and the electromagnetic valve at the low-pressure side of the compressor 3 is closed after the preset time; the indoor heat exchanger 1 is heated, so that the indoor heat exchanger 1 is defrosted and cleaned. It should be noted that, as shown in fig. 1 and 2, in the heating condition, the refrigerant flows clockwise as shown in fig. 1, after the air conditioner is switched from the heating condition to the cooling condition, the refrigerant flows counterclockwise as shown in fig. 2, at this time, the solenoid valve on the low pressure side of the compressor 3 is the first solenoid valve 10 in fig. 2, the solenoid valve on the high pressure side of the compressor 3 is the second solenoid valve 11 in fig. 2, that is, the first solenoid valve 10 is located on the low pressure side of the compressor 3, and the second solenoid valve 11 is located on the high pressure side of the compressor 3, in the present invention, after the electronic expansion valve 4 is closed, the refrigerant is gradually recovered to the outdoor side of the air conditioner along the counterclockwise direction, after the recovery is completed, that is, after the preset time is reached, the first solenoid valve 10 is closed, so that the refrigerant is blocked on the outdoor side of the air conditioner, thereby preventing the refrigerant from being affected in the subsequent defrosting process of the indoor heat, the defrosting efficiency and the defrosting effect of the indoor heat exchanger 1 are improved. The preset time may be 30 seconds, that is, the first electromagnetic valve 10 is closed after 30 seconds, so as to ensure that all the refrigerants are recovered to the outdoor side of the air conditioner, and of course, the preset time may also be other times. In addition, it should be noted that, in the present invention, the liquid pump 8 is preferably a water pump, and the liquid storage tank 9 is preferably a water storage tank, that is, the indoor heat exchanger 1 is frosted by the action of water circulation, of course, other liquid pumps 8 may be selected as long as the solution in the solution circulation system can be circulated, in addition, the liquid storage tank 9 may store water, or a mixed solution of water and other solutions may be stored, that is, other solvents may be added into water, so that the frosting speed can be increased by the action of the solvent when the indoor heat exchanger 1 is frosted, and a person skilled in the art may flexibly set the type of the solution in the liquid storage tank 9 in practical application as long as the frosting of the indoor heat exchanger 1 is facilitated.

In a preferred embodiment, the step of "increasing the rotation speed of the liquid pump 8" includes: the speed of the liquid pump 8 is gradually increased to the maximum speed. After entering the indoor self-cleaning mode, the air conditioner is switched from the heating working condition to the refrigerating working condition, under the normal refrigerating working condition, the liquid pump 8 runs at the refrigerating rotating speed, and the liquid pump 8 is rapidly increased to the highest rotating speed in a short time, so that the preparation stage before frosting is completed. The gradual increase of the rotation speed of the liquid pump 8 may be a linear increase of the rotation speed of the liquid pump 8, or a non-linear increase of the rotation speed of the liquid pump 8, and a person skilled in the art can flexibly set the rotation speed increase mode of the liquid pump 8 in practical application, so long as the rotation speed of the liquid pump 8 is increased to the highest rotation speed, and then the indoor heat exchanger 1 is rapidly frosted in the frosting process. Further preferably, the step of "reducing the opening degree of the electronic expansion valve", the step of "closing the indoor fan of the air conditioner", and the step of "increasing the rotation speed of the liquid pump" are performed simultaneously, that is, before entering the frosting mode, the preparation for frosting is completed as quickly as possible, and the time of the frosting preparation stage is shortened, so as to reduce the self-cleaning time of the indoor heat exchanger 1 of the air conditioner as a whole and improve the self-cleaning efficiency.

Preferably, simultaneously with or after the step of "heating the indoor heat exchanger 1", the self-cleaning control method of the present invention further includes: the indoor fan of the air conditioner is operated at a low speed. The indoor heat exchanger 1 is heated to quickly defrost the indoor heat exchanger 1, and in the defrosting process, the air flow on the surface of frost can be accelerated by enabling an indoor fan to operate at a low speed, so that the defrosting is quicker, and the defrosting effect and the defrosting efficiency are improved. It should be noted that the low-speed operation of the indoor fan in the invention means that the rotating speed of the indoor fan is lower than that of the normal refrigeration fan, so that the defrosting water generated by defrosting can not enter the room in a splashing manner to pollute the indoor environment in the rotating process of the fan. Specifically, the indoor heat exchanger 1 is provided with an electric heating pipe, and the step of "heating the indoor heat exchanger 1" specifically includes: the indoor heat exchanger 1 is heated by connecting high voltage to the electric heating tube. In practical application, high voltage is applied to an electric heating tube (preferably, the hairpin tube 12) to heat the electric heating tube, so that the indoor heat exchanger 1 is heated in a short distance, and frost on the indoor heat exchanger 1 is melted at the highest speed.

In a preferred embodiment, the self-cleaning control method further includes, in parallel with the step of "decreasing the opening degree of the electronic expansion valve 4": the frequency of the compressor 3 is increased, and the frosting of the indoor heat exchanger 1 can be facilitated by increasing the frequency of the compressor 3. Further preferably, the step of "raising the frequency of the compressor 3" includes: the frequency of the compressor 3 is gradually increased to the highest frequency. After entering the indoor self-cleaning mode, the air conditioner is switched from the heating working condition to the refrigerating working condition, under the normal refrigerating working condition, the compressor 3 operates at the refrigerating frequency, and the compressor 3 is rapidly increased to the maximum frequency in a short time, so that the preparation stage before frosting is completed. The frequency of the compressor 3 can be gradually increased in a linear relationship or in a nonlinear relationship, and a person skilled in the art can flexibly set the frequency increasing mode of the compressor 3 in practical application, as long as the frequency of the compressor 3 is increased to the highest frequency, and further the indoor heat exchanger 1 is rapidly frosted in the frosting process.

Preferably, simultaneously with the step of "increasing the rotation speed of the liquid pump 8", the self-cleaning control method of the present invention further includes: the voltage of the indoor solution membrane 6 and the voltage of the outdoor solution membrane 7 are raised. By increasing the voltage of the indoor solution film 6 and the voltage of the outdoor solution film 7, the amount of water vapor absorbed by the indoor solution film 6 and the amount of water vapor absorbed by the outdoor solution film 7 can be increased, so that the water vapor can be continuously reduced to the indoor heat exchanger 1 under the action of the liquid pump 8, namely, the indoor heat exchanger 1 is fully humidified, and then the indoor heat exchanger 1 is rapidly frosted, and the frosting efficiency is increased. In a preferred embodiment, the step of "increasing the voltage of the indoor solution membrane 6 and the voltage of the outdoor solution membrane 7" includes: the voltage of the indoor solution membrane 6 and the voltage of the outdoor solution membrane 7 were gradually raised to the highest voltage. After the air conditioner enters the indoor self-cleaning mode, the air conditioner is switched from the heating working condition to the refrigerating working condition, under the normal refrigerating working condition, the voltage of the indoor solution membrane 6 and the voltage of the outdoor solution membrane 7 are both the refrigerating working condition voltage, the voltage of the indoor solution membrane 6 and the voltage of the outdoor solution membrane 7 are rapidly increased, namely the water vapor absorption amount of the indoor solution membrane 6 and the water vapor absorption amount of the outdoor solution membrane 7 are rapidly increased, and therefore the preparation stage before frosting is completed. The gradual increase of the voltage of the indoor solution film 6 and the voltage of the outdoor solution film 7 may be a linear increase or a nonlinear increase of the voltages of the indoor solution film 6 and the outdoor solution film 7, and those skilled in the art can flexibly set the voltage increase modes of the voltages of the indoor solution film 6 and the outdoor solution film 7 in practical applications, as long as the voltages of the indoor solution film 6 and the outdoor solution film 7 are increased to the maximum voltage, and further the indoor heat exchanger 1 is rapidly frosted in the frosting process.

The solution according to the invention is further elucidated below in connection with a most preferred embodiment. As shown in fig. 1, 2 and 4, in particular, in the case where the air conditioner performs a heating operation, after the air conditioner receives an indoor self-cleaning command, the frequency of the compressor 3 is firstly reduced to be lower than the frequency allowing the four-way valve 5 to reverse, then the four-way valve 5 is reversed, the air conditioner is switched to the refrigeration working condition, then the compressor 3 is raised to the maximum frequency fmax allowed by refrigeration according to the rapid frequency raising rate V, an outdoor fan of the air conditioner is raised to Rao-max from Rao, the electronic expansion valve 4 is closed to a b2 state from a b1 state, an indoor fan of the air conditioner is stopped, the rotating speed of the liquid pump 8 is raised to Rs-max from Rs, the voltage of the indoor solution film 6 is regulated to Vn-max from Vn, the voltage of the outdoor solution film 7 is regulated to Vao-max from Vao, the hairpin pipe 12 of the indoor machine is in a non-electrified state, the time is t continuously, and the stage is a preparation stage before frosting; after the preparation stage is finished, the indoor heat exchanger 1 starts to frost for t1, and the stage is a frosting stage; after the frost is finished, the main control board of the air conditioner sends a refrigerant recovery command, firstly, the throttling element (comprising the electronic expansion valve 4, the stop valve, the capillary tube, the throttling short tube and the like) is quickly closed, the first electromagnetic valve 10 is closed after the preset time, the refrigerant recovery is finished, the refrigerant recovery stage is a refrigerant recovery stage, the frequency of the compressor 3 in the stage is the highest frequency of refrigeration, the rotating speed of the outdoor fan is the highest, the electronic expansion valve 4 is in a state from a b2 to a b3 (namely in a closed state), the liquid pump 8 is powered off, the indoor solution film 6 is powered off, and the outdoor solution film 7 is powered off; then defrosting is carried out, firstly, high voltage is switched on to heat the hairpin pipe 12 to complete defrosting, and a large amount of defrosting water takes away a dust and bacteria mixture on the surface of the indoor heat exchanger 1 for t 3; then the indoor fan runs at a low speed for t4, thereby completing the washing process of the indoor heat exchanger 1; and finally, resetting the compressor 3, the outdoor fan, the indoor fan, the electronic expansion valve 4 and the like to return to the indoor refrigeration state of the air conditioner for continuous operation for t5, so that defrosting is finished.

So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.

Claims (10)

1. A self-cleaning control method for an air conditioner comprises an indoor heat exchanger, an outdoor heat exchanger, a compressor, an electronic expansion valve and a four-way valve, wherein the indoor heat exchanger, the electronic expansion valve, the outdoor heat exchanger, the compressor and the four-way valve form a closed-loop refrigerant circulating system,
the air conditioner is characterized by further comprising an indoor solution film, an outdoor solution film, a liquid pump and a liquid storage tank, wherein the indoor solution film is arranged on the indoor heat exchanger, the outdoor solution film is arranged on the outdoor heat exchanger, the indoor solution film, the liquid storage tank, the outdoor solution film and the liquid pump form a closed-loop solution circulating system, and the self-cleaning control method comprises the following steps:
under the heating condition, the compressor is subjected to frequency reduction, and the four-way valve is reversed;
reducing the opening degree of the electronic expansion valve, closing an indoor fan of the air conditioner and increasing the rotating speed of the liquid pump, so that the indoor heat exchanger is frosted;
after the indoor heat exchanger frosts, the electronic expansion valve is closed firstly, and the electromagnetic valve at the low-pressure side of the compressor is closed after a preset time;
and heating the indoor heat exchanger, so that the indoor heat exchanger is defrosted and cleaned.
2. The self-cleaning control method of claim 1, wherein the step of "increasing the rotational speed of the liquid pump" specifically comprises:
and gradually increasing the rotation speed of the liquid pump to the highest rotation speed.
3. The self-cleaning control method of claim 1, wherein the steps of reducing the opening degree of the electronic expansion valve, turning off an indoor fan of the air conditioner, and increasing the rotation speed of the liquid pump are performed simultaneously.
4. The self-cleaning control method according to claim 1, wherein, simultaneously with or after the step of "heating the indoor heat exchanger", the self-cleaning control method further comprises:
and enabling an indoor fan of the air conditioner to run at a low speed.
5. The self-cleaning control method according to claim 1, wherein the indoor heat exchanger is provided with an electric heating pipe, and the step of heating the indoor heat exchanger specifically comprises:
and the indoor heat exchanger is heated by connecting high-voltage electricity to the electric heating pipe.
6. The self-cleaning control method of claim 1, wherein the liquid pump is a water pump and the reservoir is a water reservoir.
7. The self-cleaning control method according to any one of claims 1 to 6, wherein, simultaneously with the step of "reducing the opening degree of the electronic expansion valve", the self-cleaning control method further comprises:
up-converting the compressor.
8. The self-cleaning control method of claim 7, wherein the step of "upshifting the compressor" specifically comprises:
gradually increasing the frequency of the compressor to a maximum frequency.
9. The self-cleaning control method according to any one of claims 1 to 6, characterized in that, simultaneously with the step of "increasing the rotation speed of the liquid pump", the self-cleaning control method further comprises:
raising the voltage of the indoor solution membrane and the voltage of the outdoor solution membrane.
10. The self-cleaning control method according to claim 9, wherein the step of "raising the voltage of the indoor solution film and the voltage of the outdoor solution film" specifically comprises:
gradually increasing the voltage of the indoor solution membrane and the voltage of the outdoor solution membrane to a maximum voltage.
CN201810848779.0A 2018-07-28 2018-07-28 Self-cleaning control method for air conditioner CN110762760A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003279191A (en) * 2002-03-20 2003-10-02 Mitsubishi Electric Corp Freezer
CN102038272A (en) * 2010-12-09 2011-05-04 东南大学 Energy-saving compound air-conditioning device for food freezing and thawing device
JP2016052611A (en) * 2014-09-02 2016-04-14 オリオン機械株式会社 Compressed-air dehumidifying apparatus
CN206361857U (en) * 2016-09-23 2017-07-28 青岛海尔智能技术研发有限公司 Heat reclamation type embrane method solution heat pump system
CN107504640A (en) * 2017-08-21 2017-12-22 广东美的制冷设备有限公司 Air-conditioning system, air conditioner and refrigerant recovering control method
CN107975991A (en) * 2017-11-21 2018-05-01 珠海格力电器股份有限公司 Dedusting control method and air-conditioning system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003279191A (en) * 2002-03-20 2003-10-02 Mitsubishi Electric Corp Freezer
CN102038272A (en) * 2010-12-09 2011-05-04 东南大学 Energy-saving compound air-conditioning device for food freezing and thawing device
JP2016052611A (en) * 2014-09-02 2016-04-14 オリオン機械株式会社 Compressed-air dehumidifying apparatus
CN206361857U (en) * 2016-09-23 2017-07-28 青岛海尔智能技术研发有限公司 Heat reclamation type embrane method solution heat pump system
CN107504640A (en) * 2017-08-21 2017-12-22 广东美的制冷设备有限公司 Air-conditioning system, air conditioner and refrigerant recovering control method
CN107975991A (en) * 2017-11-21 2018-05-01 珠海格力电器股份有限公司 Dedusting control method and air-conditioning system

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