WO2019024722A1 - Air conditioner and self-cleaning control method for indoor unit thereof - Google Patents

Air conditioner and self-cleaning control method for indoor unit thereof Download PDF

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Publication number
WO2019024722A1
WO2019024722A1 PCT/CN2018/096851 CN2018096851W WO2019024722A1 WO 2019024722 A1 WO2019024722 A1 WO 2019024722A1 CN 2018096851 W CN2018096851 W CN 2018096851W WO 2019024722 A1 WO2019024722 A1 WO 2019024722A1
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WO
WIPO (PCT)
Prior art keywords
heat exchanger
indoor heat
temperature
expansion valve
self
Prior art date
Application number
PCT/CN2018/096851
Other languages
French (fr)
Chinese (zh)
Inventor
刘超超
曾福祥
王彦生
姜全超
Original Assignee
青岛海尔空调器有限总公司
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Publication of WO2019024722A1 publication Critical patent/WO2019024722A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30—Arrangement or mounting of heat-exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • 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
    • F28G13/00—Appliances or processes not covered by groups F28G1/00 - F28G11/00; Combinations of appliances or processes covered by groups F28G1/00 - F28G11/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2513—Expansion valves
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • the invention relates to a household air conditioner, in particular to an air conditioner and a self-cleaning control method thereof.
  • the conventional air-conditioning scheme is generally cleaned regularly, which brings serious inconvenience to the user. Therefore, in order to solve the above problems caused by the adhesion of dust on the heat exchanger of the air conditioner, the prior art has used the heat exchanger as the evaporation. When the device is used, the condensed water is generated, and the condensed water is taken away to remove the dirt on the surface of the heat exchanger, thereby realizing self-cleaning of the heat exchanger of the indoor unit of the air conditioner.
  • the above scheme for cleaning the indoor unit heat exchanger of the air conditioner by using the condensed water may affect the normal cooling or heating of the air conditioner during the actual use, for example, during the heating process, causing the indoor temperature fluctuation to be brought to the user. Discomfort has affected the user experience.
  • An object of the present invention is to provide an air conditioner having a self-cleaning function and a control method thereof, which solve at least some of the above technical problems.
  • a further object of the present invention is to reduce the self-cleaning of the self-cleaning to cause large fluctuations in temperature during the heating process.
  • an indoor unit self-cleaning control method for an air conditioner wherein the refrigeration system of the air conditioner includes an indoor unit heat exchange assembly sequentially connected by a refrigerant line, a refrigerant flow direction switching device, and compression The machine, the outdoor unit heat exchange component, and the throttling device, wherein the indoor unit heat exchange component comprises: a first indoor heat exchanger connected in series and a second indoor heat exchanger, wherein the second indoor heat exchanger is switched by a refrigerant flow direction
  • the device is connected to the compressor, and an electronic expansion valve is disposed between the first indoor heat exchanger and the second indoor heat exchanger
  • the control method comprises: receiving a trigger signal for the air conditioner to open the self-cleaning function; adjusting the refrigerant flow to the switching device
  • the compressor supplies the compressed refrigerant to the indoor unit heat exchange component; by adjusting the opening of the electronic expansion valve, the first indoor heat exchanger is cooled and then heated to continuously frost the surface during the refrigeration phase, and The defrosting
  • the step of first cooling and reheating the first indoor heat exchanger by adjusting the opening degree of the electronic expansion valve comprises: detecting the temperature of the first indoor heat exchanger; adjusting the electron according to the temperature of the first indoor heat exchanger
  • the opening degree of the expansion valve causes the temperature of the first indoor heat exchanger to drop to a first set temperature; maintaining the opening degree of the electronic expansion valve when the temperature of the first indoor heat exchanger drops to the first set temperature, so that the first The surface of the indoor heat exchanger is continuously frosted until the set first defrosting condition is satisfied; after the first defrosting condition is satisfied, the opening of the electronic expansion valve is opened to the maximum, so that the first indoor heat exchanger releases heat.
  • defrosting the opening degree of the electronic expansion valve
  • the first defrosting condition comprises: the temperature of the first indoor heat exchanger drops to a second set temperature or the opening of the electronic expansion valve is maintained for more than a first set time, and the second set temperature is lower than The first set temperature.
  • the method further includes: adjusting the flow of the refrigerant to the switching device to a state in which the compressor supplies the compressed refrigerant to the outdoor heat exchange component; and adjusting the opening of the electronic expansion valve , the second indoor heat exchanger is cooled, and the frost is continuously formed on the surface thereof; after the preset second defrosting condition is satisfied, the refrigerant flows to the switching device to adjust the compressor to provide the compressed refrigerant to the indoor unit heat exchange component.
  • the state of the electronic expansion valve is opened to the maximum, so that the second indoor heat exchanger releases heat, and the water formed by the defrosting removes the attached contaminants to achieve self-cleaning of the second indoor heat exchanger.
  • the step of cooling the second indoor heat exchanger by adjusting the opening degree of the electronic expansion valve comprises: detecting the temperature of the second indoor heat exchanger; adjusting the opening of the electronic expansion valve according to the temperature of the second indoor heat exchanger Degree, the temperature of the second indoor heat exchanger is lowered to a third set temperature; the opening of the electronic expansion valve is maintained when the temperature of the second indoor heat exchanger is lowered to the third set temperature, so that the second indoor heat exchanger The surface continues to frost until the second defrosting condition is met.
  • the second defrosting condition comprises: the temperature of the second indoor heat exchanger drops to a fourth set temperature or the opening of the electronic expansion valve is maintained for more than a second set time; the fourth set temperature is lower than The third set temperature.
  • the method further comprises: measuring a working environment temperature of the indoor unit of the air conditioner; and placing the electronic expansion valve under controlled when the working environment temperature is lower than the fifth set temperature State, and perform the process of first cooling and then heating the first indoor heat exchanger; when the working environment temperature is higher than the fifth set temperature, maintaining the initial opening state of the electronic expansion valve, and executing the overall self-heating of the indoor heat exchange component Cleaning process.
  • an air conditioner comprising a refrigeration system and a self-cleaning controller
  • the refrigeration system comprises: an indoor unit heat exchange component serially connected by a refrigerant pipeline, and a refrigerant flow direction switching The device, the compressor, the outdoor unit heat exchange component, and the throttle device
  • the indoor unit heat exchange assembly comprises: a first indoor heat exchanger connected in series and a second indoor heat exchanger, wherein the second indoor heat exchanger passes the refrigeration
  • the agent flow switching device is connected to the compressor, and an electronic expansion valve is disposed between the first indoor heat exchanger and the second indoor heat exchanger
  • the self-cleaning controller is electrically connected to the refrigeration system, and is configured to: receive the air conditioner to open from The trigger signal of the cleaning function; the refrigerant flow is adjusted to the switching device to adjust the state in which the compressor supplies the compressed refrigerant to the indoor unit heat exchange component; and the first indoor heat exchanger is cooled and then heated by adjusting the opening degree of the electronic expansion valve
  • the self-cleaning controller is further configured to: detect a temperature of the first indoor heat exchanger; adjust an opening degree of the electronic expansion valve according to a temperature of the first indoor heat exchanger, so that a temperature of the first indoor heat exchanger is lowered to a first set temperature; maintaining an opening degree of the electronic expansion valve when the temperature of the first indoor heat exchanger drops to a first set temperature, so that the surface of the first indoor heat exchanger is continuously frosted until the set condition is satisfied a defrosting condition; after satisfying the first defrosting condition, the opening of the electronic expansion valve is opened to the maximum, so that the first indoor heat exchanger releases heat for defrosting, and the first defrosting condition includes: the first indoor The temperature of the heat exchanger drops to the second set temperature or the opening of the electronic expansion valve is maintained for more than the first set time, and the second set temperature is lower than the first set temperature.
  • the self-cleaning controller is further configured to: after the first indoor heat exchanger completes self-cleaning, adjust the flow of the refrigerant to the switching device to provide a state in which the compressor supplies the compressed refrigerant to the outdoor heat exchange component; and detect the second The temperature of the indoor heat exchanger; adjusting the opening degree of the electronic expansion valve according to the temperature of the second indoor heat exchanger, so that the temperature of the second indoor heat exchanger is lowered to the third set temperature; maintaining the temperature of the second indoor heat exchanger Decrease the opening degree of the electronic expansion valve when the temperature is lowered to the third set temperature, so that the surface of the second indoor heat exchanger is continuously frosted until the preset second defrosting condition is satisfied; after the second defrosting condition is satisfied, the refrigerant is The flow direction switching device adjusts to a state in which the compressor supplies compressed refrigerant to the indoor unit heat exchange component, and opens the opening of the electronic expansion valve to the maximum, so that the second indoor heat exchanger releases heat, and takes away the water formed by
  • the self-cleaning controller is further configured to: after receiving the trigger signal that the air conditioner turns on the self-cleaning function, measure the working environment temperature of the indoor unit of the air conditioner; and when the working environment temperature is lower than the fifth set temperature, the electronic The expansion valve is placed in a controlled state, and the first indoor heat exchanger is first cooled and then heated; when the working environment temperature is higher than the fifth set temperature, the initial opening state of the electronic expansion valve is maintained, and the indoor unit is executed The overall self-cleaning process of the heat exchange components.
  • the air conditioner and the indoor unit self-cleaning control method thereof are especially suitable for the air conditioner operating in a heating state, and the structure of the indoor unit heat exchange component is improved, and the first indoor heat exchanger connected in series is arranged a second indoor heat exchanger, and an electronic expansion valve is added between the first indoor heat exchanger and the second indoor heat exchanger, and the first indoor exchange is respectively performed by adjusting the flow direction of the refrigerant and the opening degree of the electronic expansion valve
  • the heat exchanger and the second indoor heat exchanger respectively perform a self-cleaning process, and the self-cleaning process of the indoor heat exchanger component in the prior art is reduced, thereby reducing the influence on the working environment temperature and preventing the temperature from fluctuating. , to bring a better user experience.
  • the air conditioner of the present invention and the indoor unit self-cleaning control method optimize the self-cleaning process of the first indoor heat exchanger and the second indoor heat exchanger, which takes less time and has a self-cleaning effect. it is good.
  • the air conditioner of the present invention and the indoor unit self-cleaning control method thereof can determine a self-cleaning scheme according to the working environment of the indoor unit, and select the indoor self-cleaning unit or the first indoor heat exchanger and the second
  • the indoor heat exchangers are separately self-cleaning, which saves the self-cleaning process and the energy consumption of electricity when the user is comfortable.
  • FIG. 1 is a schematic functional block diagram of an air conditioner according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of a refrigeration system of an air conditioner according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of an indoor unit self-cleaning control method of an air conditioner according to an embodiment of the present invention
  • FIG. 4 is a flow chart of realizing self-cleaning of a first indoor heat exchanger in an indoor unit self-cleaning control method of an air conditioner according to an embodiment of the present invention
  • FIG. 5 is a flow chart for realizing self-cleaning of a second indoor heat exchanger in an indoor unit self-cleaning control method of an air conditioner according to an embodiment of the present invention
  • FIG. 6 is a flow chart showing a specific implementation of an indoor unit self-cleaning control method for an air conditioner according to an embodiment of the present invention.
  • FIG. 1 is a schematic functional block diagram of an air conditioner 10 in accordance with one embodiment of the present invention.
  • 2 is a schematic diagram of a refrigeration system of an air conditioner 10 in accordance with an embodiment of the present invention.
  • the air conditioner 10 may generally include an air conditioner indoor unit 100 and an air conditioner outdoor unit 200.
  • the air conditioner indoor unit 100 and the air conditioner outdoor unit 200 complete an air conditioning refrigeration and heating cycle by an effective cooperative operation, thereby realizing a living room.
  • the internal temperature is regulated by heat and cold.
  • the refrigeration system of the air conditioner 10 can be realized by a compression refrigeration cycle that utilizes a compression phase change cycle of the refrigerant in the compressor 250, the condenser, the evaporator, and the throttle device 240 to achieve heat transfer.
  • the refrigeration system may further be provided with a refrigerant flow switching device 260 to change the flow direction of the refrigerant, so that the indoor unit heat exchange unit 110 alternately functions as an evaporator or a condenser to realize a cooling or heating function, and the refrigerant flow direction switching device 260 generally adopts four. Through the valve to achieve.
  • the working principle of the compression refrigeration cycle is: the compressor 250 is the power of the refrigeration cycle, which is driven by the motor to rotate without stopping.
  • the refrigerant vapor is also increased by the compression action.
  • the pressure and temperature create conditions that transfer the heat of the refrigerant vapor to the ambient medium.
  • the low temperature and low pressure refrigerant vapor is compressed to a high temperature and high pressure state.
  • the condenser is a heat exchange device, which uses the environment to cool the refrigerant, removes the heat of the high-temperature high-pressure refrigerant vapor from the compressor 250, and cools and condenses the high-temperature high-pressure refrigerant vapor into a high-pressure normal temperature refrigerant liquid.
  • the high-pressure normal temperature refrigerant liquid is directly sent to the evaporator, and according to the saturation pressure and the saturation temperature-corresponding principle, the pressure of the refrigerant liquid is lowered, thereby lowering the temperature of the refrigerant liquid.
  • the high-pressure normal temperature refrigerant liquid is passed through the throttling device 240 to obtain a low-temperature low-pressure refrigerant, which is then sent to the evaporator for absorption by heat.
  • a capillary tube can generally be used as the throttle device 240 in the air conditioner 10.
  • the evaporator is also a heat exchange device.
  • the low-temperature and low-pressure refrigerant liquid after the throttling evaporates (boiling) into vapor, absorbs the surrounding heat, and lowers the ambient temperature.
  • the refrigerant flow direction switching device 260 is configured to switch the flow direction of the refrigerant in the compression refrigeration cycle.
  • the compressor 250 supplies the compressed refrigerant to the indoor unit heat exchange assembly 110, and the indoor unit heat exchange assembly 110 As a condenser, the refrigerant is condensed by the indoor unit heat exchange unit 110, sent to the outdoor unit heat exchange unit 210 through the throttle unit 240, and the outdoor unit heat exchange unit 210 absorbs external heat, and then the refrigerant is re-sent to the compressor. 250.
  • the compressor 250 supplies compressed refrigerant to the outdoor unit heat exchange unit 210, and the outdoor unit heat exchange unit 210 serves as a condenser.
  • the refrigerant passes through the outdoor unit heat exchange unit 210, the refrigerant is throttled.
  • the device 240 is sent to the indoor unit heat exchange unit 110.
  • the indoor unit heat exchange unit 110 absorbs external heat, cools the surrounding air, and cools and dehumidifies the air, and then re-feeds the refrigerant into the compressor 250.
  • the indoor unit fan 120 and the outdoor unit fan 220 in the refrigeration system respectively generate an air flow for exchanging heat with the indoor unit heat exchange unit 110 and the outdoor unit heat exchange unit 210.
  • the air conditioner 10 Since the air conditioner 10 accumulates dust on the indoor unit heat exchange unit 110 and the outdoor unit heat exchange unit 210 during use, the air conditioner 10 becomes a potential source of pollution in the environment, for example, in some tests, it is found to be unclean for a long time.
  • the degree of contamination of the indoor unit heat exchange assembly 110 is very alarming, which poses a great health risk to the user.
  • the self-cleaning technology appearing in the prior art rapidly disintegrates the dirt and dirt by peeling off the dirt by the frosting, and then the defrosted water rinses the indoor unit heat exchange component 110 to achieve the purpose of cleaning.
  • the indoor unit heat exchange assembly 110 needs to first collect the moisture of the surrounding environment, which necessarily requires the indoor unit heat exchange assembly 110 to operate in the evaporator state. If the self-cleaning process during the heating process inevitably causes the air conditioner indoor unit 100 to output cold air, the temperature of the working environment is lowered, and the user feels uncomfortable.
  • the indoor unit heat exchange assembly 110 includes: a first indoor heat exchanger 111 and a second indoor heat exchanger 112 connected in series, wherein the second indoor heat exchanger 112 is connected to the compressor 250 through the refrigerant flow switching device 260, and an electronic expansion valve 130 is disposed between the first indoor heat exchanger 111 and the second indoor heat exchanger 112.
  • the first indoor heat exchanger 111 is connected to the outdoor unit heat exchange assembly 210 through the throttle device 240.
  • the electronic expansion valve 130 is kept open during normal operation, and does not affect cooling or heating. During the self-cleaning process, the opening degree of the electronic expansion valve 130 can be controlled.
  • the air conditioner 10 of the embodiment is further provided with a self-cleaning controller 150, which can be realized by the original control panel of the air conditioner 10 by configuring a self-cleaning control program or by preset self-cleaning control logic,
  • a self-cleaning controller 150 which can be realized by the original control panel of the air conditioner 10 by configuring a self-cleaning control program or by preset self-cleaning control logic,
  • the hardware configuration of the self-cleaning controller 150 itself is well known to those skilled in the art and will not be described herein.
  • the process of self-cleaning control by the self-cleaning controller 150 is: receiving a trigger signal for the air conditioner 10 to turn on the self-cleaning function (for example, receiving a self-cleaning control command issued by the user through the remote controller or the human-machine interaction interface of the air conditioner 10, or an air conditioner)
  • the device 10 determines a trigger command generated by self-cleaning according to the working state thereof; and after the receiving the trigger signal, adjusts the flow of the refrigerant to the switching device 260 to the state in which the compressor 250 supplies the compressed refrigerant to the indoor unit heat exchange assembly 110.
  • the first indoor heat exchanger 111 is first cooled and then heated.
  • the self-cleaning of the first indoor heat exchanger 111 is achieved by continuously frosting the surface during the cooling phase and performing defrosting during the heating phase, and the water formed by the defrosting is used to carry away the adhered contaminants.
  • the self-cleaning controller 150 adjusts the opening degree of the electronic expansion valve 130 such that the first indoor heat exchanger 111 first cools and reheats the heat, specifically: detecting the temperature of the first indoor heat exchanger 111 (for example, the first indoor heat exchange) Adjusting the opening degree of the electronic expansion valve 130 according to the temperature of the first indoor heat exchanger 111, so that the temperature of the first indoor heat exchanger 111 is lowered to the first set temperature; maintaining the first indoor change When the temperature of the heater 111 drops to the first set temperature, the opening degree of the electronic expansion valve 130 causes the surface of the first indoor heat exchanger 111 to continue to frost until the set first defrosting condition is satisfied; After the frost condition, the opening degree of the electronic expansion valve 130 is opened to the maximum, and the first indoor heat exchanger 111 releases heat to perform defrosting.
  • the first defrosting condition includes: the temperature of the first indoor heat exchanger 111 drops to the second set temperature or the opening of the electronic expansion valve 130 is maintained for more than the first set time, and the second
  • the electronic expansion valve 130 can achieve a throttling effect, so that the high-temperature high-pressure refrigerant vapor is cooled in the second indoor heat exchanger 112, and then throttled by the electronic expansion valve 130 to obtain a low-temperature low-pressure refrigerant.
  • the first heat exchanger and the outdoor unit heat exchange unit 210 together perform cooling as an evaporator, so that the first heat exchanger condenses moisture in the surrounding air and starts frosting on the surface thereof.
  • the electronic expansion valve 130 maintains the current opening degree, so that the surface of the first indoor heat exchanger 111 continues to frost until the set first defrosting condition is satisfied. (The temperature of the first indoor heat exchanger 111 drops to the second set temperature or the opening of the electronic expansion valve 130 is maintained for more than the first set time). After the first defrosting condition described above is satisfied, it can be considered that the first heat exchanger has been frosted. And during the frosting of the first heat exchanger, the compressor 250 can maintain its inconvenient operating frequency and turn off the indoor unit fan 120 and the outdoor unit fan 220.
  • the opening degree of the electronic expansion valve 130 is opened to the maximum (the opening speed needs to be as soon as possible), so that the first indoor heat exchanger 111 is operated in the condenser state, thereby The heat is released to perform defrosting, and the water formed by the defrosting is used to carry away the adhered contaminants, thereby achieving self-cleaning of the first indoor heat exchanger 111.
  • the second indoor heat exchanger 112 can maintain the heating state, effectively reducing the influence of the first indoor heat exchanger 111 on the surrounding environment, and avoiding the uncomfortable feeling brought by the output cold air to the user.
  • the self-cleaning controller 150 may further perform the self-cleaning process of the second indoor heat exchanger 112, specifically including: adjusting the flow of the refrigerant to the switching device to the compressor 250.
  • the state of the compressed refrigerant is supplied to the outdoor unit heat exchange unit 210 (corresponding to the cooling state of the air conditioner 10); the temperature of the second indoor heat exchanger 112 is detected; and the electronic expansion valve 130 is adjusted according to the temperature of the second indoor heat exchanger 112.
  • the opening degree causes the temperature of the second indoor heat exchanger 112 to drop to a third set temperature; maintaining the opening degree of the electronic expansion valve 130 when the temperature of the second indoor heat exchanger 112 drops to the third set temperature, so that The surface of the indoor heat exchanger 112 continues to frost until the preset second defrosting condition is satisfied; after the second defrosting condition is satisfied, the refrigerant flow is adjusted to the switching device to the compressor 250 to provide the indoor unit heat exchange assembly 110.
  • the state of the refrigerant is compressed, and the opening degree of the electronic expansion valve 130 is opened to the maximum, so that the second indoor heat exchanger 112 releases heat, and the water formed by the defrosting is used to carry away the attached pollutants to realize the second indoor heat exchanger.
  • the second defrosting condition includes: the temperature of the second indoor heat exchanger 112 drops to a fourth set temperature or the opening of the electronic expansion valve 130 is maintained for more than a second set time; the fourth set temperature Below the third set temperature.
  • the process is similar to the self-cleaning process of the first indoor heat exchanger 111, that is, the throttling action is realized by the electronic expansion valve 130, and the first state is maintained in the state.
  • the indoor heat exchanger 111 continues to generate heat, reducing the influence of the second indoor heat exchanger 112 on the surrounding environment.
  • the first set temperature, the second set temperature, the third set temperature, and the fourth set temperature may all be tested according to the actual specifications of the air conditioner 10 and the operating environment, for example, the first The set temperature and the third set temperature can be set to -5 ° C, and the second set temperature and the fourth set temperature can be set to -15 ° C (the above values are 20 ° C indoors and outdoors, for a certain The results obtained by testing the specific air conditioner can be adjusted within a certain range according to the situation during the specific implementation).
  • the first set time and the second set time may also be set correspondingly, so that the first indoor heat exchanger 111 or the second indoor heat exchanger 112 cannot reach the second set temperature and the fourth under special working conditions. set temperature.
  • the self-cleaning controller 150 may further determine an end condition of the self-cleaning process according to the temperature of the first indoor heat exchanger 111 or the second indoor heat exchanger 112, such as the first indoor heat exchanger 111 or the second indoor heat exchanger.
  • the duration of the defrosting phase exceeds the set defrosting time or the temperature of the first indoor heat exchanger 111 or the second indoor heat exchanger 112 reaches the set defrosting temperature (for example, 50 ° C)
  • the indoor unit fan 120 can be supplied with air to dry the indoor unit heat exchange unit 110.
  • the above self-cleaning process requires multiple switching of the flow path of the refrigerant and starting and stopping the compressor 250, which may bring additional energy consumption. Therefore, the self-cleaning controller 150 receives the trigger signal of the self-cleaning function after the air conditioner 10 is turned on.
  • the working environment temperature of the air conditioner indoor unit 100 may be first measured; when the working environment temperature is lower than the fifth set temperature, the electronic expansion valve 130 is placed in a controlled state, and the first indoor heat exchanger 111 is first cooled.
  • the fifth set temperature when the fifth set temperature is set to 26 ° C, it is considered that when the environment is higher than 26 ° C, the overall self-cleaning of the indoor unit heat exchange unit 110 has insufficient influence on the ambient temperature to make the user feel uncomfortable, and therefore can be indoors.
  • the machine heat exchange assembly 110 performs overall self-cleaning. If the ambient temperature is lower than 26 ° C, the self-cleaning process of the first indoor heat exchanger 111 and the second indoor heat exchanger 112 described above may be performed.
  • the fifth set temperature is set to 26 ° C.
  • the fifth set temperature can be set according to the actual experience of the user.
  • the embodiment of the present invention further provides a self-cleaning control method for the indoor unit 100 of the air conditioner 10, wherein the indoor unit 100 self-cleaning control method of the air conditioner 10 is used for self-cleaning control of the air conditioner 10 in the above embodiment, and It can be performed by the self-cleaning controller 150 in the above embodiment.
  • FIG. 3 is a schematic diagram of a self-cleaning control method of the indoor unit 100 of the air conditioner 10 according to an embodiment of the present invention, and the indoor unit 100 of the air conditioner 10 is self-cleaning control.
  • the method can generally include:
  • Step S302 receiving a trigger signal that the air conditioner 10 turns on the self-cleaning function, for example, receiving a self-cleaning control command issued by the user through the remote controller or the human-machine interaction interface of the air conditioner 10, or determining that the air conditioner 10 needs to perform according to its working state. Trigger command generated by cleaning.
  • step S304 the refrigerant flow is adjusted to the switching device 260 until the compressor 250 supplies the compressed refrigerant to the indoor unit heat exchange unit 110, that is, switches to the heating state of the air conditioner 10, and if it is already in the heating state, remains The state
  • Step S306 by adjusting the opening degree of the electronic expansion valve 130, the first indoor heat exchanger 111 is first cooled and then heated, so that the surface thereof is continuously frosted during the cooling phase, and defrosting is performed during the heating stage, and the defrosting is utilized.
  • the formed water carries away the attached contaminants to achieve self-cleaning of the first indoor heat exchanger 111.
  • step S306 is a flow chart for realizing self-cleaning of the first indoor heat exchanger 111 in the indoor unit 100 self-cleaning control method of the air conditioner 10 according to an embodiment of the present invention, and the figure shows the workflow of step S306, specifically including :
  • step S402 detecting the temperature of the first indoor heat exchanger 111 can be obtained, for example, by acquiring the coil temperature of the first indoor heat exchanger 111.
  • Step S404 adjusting the opening degree of the electronic expansion valve 130 according to the temperature of the first indoor heat exchanger 111, so that the temperature of the first indoor heat exchanger 111 is lowered to the first set temperature;
  • Step S406 maintaining the opening degree of the electronic expansion valve 130 when the temperature of the first indoor heat exchanger 111 drops to the first set temperature, so that the surface of the first indoor heat exchanger 111 continues to frost until the first set is satisfied.
  • the frost condition, the first defrosting condition includes: the temperature of the first indoor heat exchanger 111 drops to the second set temperature or the opening of the electronic expansion valve 130 is maintained for more than the first set time, and the second set temperature is low At the first set temperature.
  • step S408 after the first defrosting condition is satisfied, the opening degree of the electronic expansion valve 130 is opened to the maximum, and the first indoor heat exchanger 111 is released to perform defrosting.
  • the indoor unit 100 self-cleaning control method of the air conditioner 10 of the present embodiment may further perform self-cleaning of the second indoor heat exchanger 112.
  • the specific process is: adjusting the refrigerant flow to the switching device 260 to a state in which the compressor 250 supplies compressed refrigerant to the outdoor unit heat exchange unit 210 (corresponding to switching to the cooling state of the air conditioner 10); by adjusting the opening of the electronic expansion valve 130
  • the second indoor heat exchanger 112 is cooled, from continuously frosting on the surface thereof; after the preset second defrosting condition is satisfied, the refrigerant flow is transferred to the switching device to the compressor 250 to the indoor unit heat exchange assembly 110.
  • the second defrosting condition includes: the temperature of the second indoor heat exchanger 112 drops to a fourth set temperature or the opening of the electronic expansion valve 130 is maintained for more than a second set time; The set temperature is lower than the third set temperature.
  • the self-cleaning process of the second indoor heat exchanger 112 includes:
  • Step S502 detecting the temperature of the second indoor heat exchanger 112
  • Step S504 adjusting the opening degree of the electronic expansion valve 130 according to the temperature of the second indoor heat exchanger 112, so that the temperature of the second indoor heat exchanger 112 is lowered to a third set temperature;
  • Step S506 maintaining the opening degree of the electronic expansion valve 130 when the temperature of the second indoor heat exchanger 112 drops to the third set temperature, so that the surface of the second indoor heat exchanger 112 continues to frost until the second defrosting condition is satisfied;
  • Step S508 after the second defrosting condition is satisfied, the refrigerant flow is adjusted to the switching device 260 to a state in which the compressor 250 supplies the compressed refrigerant to the indoor unit heat exchange assembly 110;
  • Step S508 the opening degree of the electronic expansion valve 130 is opened to the maximum, so that the second indoor heat exchanger 112 releases heat, and the water formed by the defrosting removes the attached pollutants, thereby realizing the self-cleaning of the second indoor heat exchanger 112. .
  • the process is similar to the self-cleaning process of the first indoor heat exchanger 111, that is, the throttling action is realized by the electronic expansion valve 130, and the first state is maintained in the state.
  • the indoor heat exchanger 111 continues to generate heat, reducing the influence of the second indoor heat exchanger 112 on the surrounding environment.
  • the working environment temperature of the air conditioner indoor unit 100 may be first measured; When the working environment temperature is lower than the fifth set temperature, the electronic expansion valve 130 is placed in a controlled state, and the first indoor heat exchanger 111 is first cooled and then heated; the working environment temperature is higher than the fifth setting. At the time of temperature, the initial opening state of the electronic expansion valve 130 is maintained, and the overall self-cleaning process of the indoor unit heat exchange unit 110 is performed.
  • the fifth set temperature when the fifth set temperature is set to 26 ° C, it is considered that when the environment is higher than 26 ° C, the overall self-cleaning of the indoor unit heat exchange unit 110 has insufficient influence on the ambient temperature to make the user feel uncomfortable, and therefore can be indoors.
  • the machine heat exchange assembly 110 performs overall self-cleaning. If the ambient temperature is lower than 26 ° C, the self-cleaning process of the first indoor heat exchanger 111 and the second indoor heat exchanger 112 described above may be performed.
  • the fifth set temperature is set to 26 ° C.
  • the fifth set temperature can be set according to the actual experience of the user.
  • the first set temperature, the second set temperature, the third set temperature, and the fourth set temperature may all be tested according to the actual specifications of the air conditioner 10 and the operating environment, for example, the first The set temperature and the third set temperature can be set to -5 ° C, and the second set temperature and the fourth set temperature can be set to -15 ° C (the above values are 20 ° C indoors and outdoors, for a certain The results obtained by testing the specific air conditioner 10 can be adjusted within a certain range according to the situation in the specific implementation.
  • the first set time and the second set time may also be set correspondingly, so that the first indoor heat exchanger 111 or the second indoor heat exchanger 112 cannot reach the second set temperature and the fourth under special working conditions. set temperature.
  • the self-cleaning controller 150 may further determine an end condition of the self-cleaning process according to the temperature of the first indoor heat exchanger 111 or the second indoor heat exchanger 112, such as the first indoor heat exchanger 111 or the second indoor heat exchanger.
  • the duration of the defrosting phase exceeds the set defrosting time or the temperature of the first indoor heat exchanger 111 or the second indoor heat exchanger 112 reaches the set defrosting temperature (for example, 50 ° C)
  • the indoor unit fan 120 can be supplied with air to dry the indoor heat exchanger assembly.
  • FIG. 6 is a flowchart of a specific implementation of an indoor unit self-cleaning control method of an air conditioner 10 according to an embodiment of the present invention. The process includes:
  • Step S602 receiving a trigger signal for the air conditioner 10 to turn on the self-cleaning function during the heating process of the air conditioner 10;
  • Step S604 the ambient temperature of the working environment of the indoor unit 100 is obtained, and it is determined whether the ambient temperature is higher than 26 ° C. If it is higher than 26 ° C, step S640 is performed to perform an overall self-cleaning process of the indoor unit heat exchange component 110;
  • Step S606 when the ambient temperature is lower than 26 ° C, the refrigerant flow is adjusted to the switching device until the compressor 250 supplies the compressed refrigerant to the indoor unit heat exchange assembly 110, that is, the heating state of the air conditioner 10 is maintained;
  • step S608 the indoor unit fan 120 and the outdoor unit fan 220 are stopped, and the compressor 250 is operated at a preset target frequency (the preset target frequency is selected according to the indoor and outdoor temperature, for example, under the condition of 20 ° C indoors and outdoors, it can be set to 40Hz);
  • Step S610 detecting the coil temperature TP1 of the first indoor heat exchanger 111, reducing the opening degree of the electronic expansion valve 130, and gradually reducing the TP1 to -5 ° C;
  • Step S612 keeping the opening degree of the electronic expansion valve 130 when TP1 is lowered to -5 ° C, so that the surface of the first indoor heat exchanger 111 continues to frost;
  • Step S614 determining whether TP1 drops to -15 ° C;
  • step S618 when any of the conditions that the TP1 falls to -15 ° C and the opening continuous holding time exceeds 10 minutes, the electronic expansion valve 130 is opened at the fastest speed, and the first indoor heat exchanger 111 releases heat for the purpose. Frost;
  • Step S620 determining whether TP1 reaches a defrosting temperature of 50 ° C;
  • Step S622 the first indoor heat exchanger 111 is self-cleaning
  • Step S624 the refrigerant flow is reversed to the switching device (four-way valve) 260, detecting the coil temperature TP2 of the second indoor heat exchanger 112;
  • Step S626 reducing the opening degree of the electronic expansion valve 130, so that TP2 gradually drops to -5 ° C;
  • Step S628, keeping the opening degree of the electronic expansion valve 130 when the TP2 is lowered to -5 ° C, so that the surface of the second indoor heat exchanger 112 continues to frost;
  • Step S630 determining whether TP2 drops to -15 ° C
  • Step S632 determining that the opening degree of the electronic expansion valve 130 is continuously maintained for more than 10 minutes;
  • step S634 when any of the conditions that the TP2 falls to -15 ° C and the opening continuous holding time exceeds 10 minutes, the refrigerant flow is again reversed to the switching device (four-way valve) 260, and the electronic expansion valve 130 is opened.
  • the two indoor heat exchangers 112 release heat for defrosting;
  • Step S636 determining whether TP2 reaches a defrosting temperature of 50 ° C;
  • step S638 the second indoor heat exchanger 112 is self-cleaning.
  • the specific determination threshold value may be adjusted according to the specifications, the operating environment, and the user habit of the air conditioner 10.
  • the specific numerical values are merely examples.
  • the indoor unit 100 self-cleaning control method of the air conditioner 10 of the embodiment is particularly suitable for the air conditioner 10 to operate in a heating state, and the first indoor heat exchanger 111 and the second indoor heat exchanger 112 respectively perform self-cleaning.
  • the process compares the self-cleaning process of the indoor unit heat exchange component 110 in the prior art, reduces the influence on the working environment temperature, prevents the violent fluctuation of the temperature, and brings a better user experience.

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Abstract

An air conditioner (10) and a self-cleaning control method for an indoor unit (100) thereof. An indoor unit heat exchange assembly (110) of the air conditioner comprises: a first indoor heat exchanger (111) and a second indoor heat exchanger (112) connected in series; the second indoor heat exchanger (112) is connected to a compressor by means of a refrigerant flow direction switching device; an electronic expansion valve (130) is provided between the first indoor heat exchanger (111) and the second indoor heat exchanger (112). Moreover, the control method comprises: receiving a trigger signal for enabling a self-cleaning function of the air conditioner (S302); adjusting a refrigerant flow direction switching device to a state in which a compressor provides a compressed refrigerant to the indoor unit heat exchange assembly (S304); adjusting the opening degree of the electronic expansion valve so that the first indoor exchanger (111) first performs refrigeration and then performs heating, in order to continue frosting on the surface thereof in a refrigeration phase and defrost in a heating phase, and removing attached contaminants with water formed by the defrosting to implement self-cleaning of the first indoor heat exchanger (111) (S306).

Description

空调器及其室内机自清洁控制方法Air conditioner and indoor unit self-cleaning control method thereof 技术领域Technical field
本发明涉及家用空调，特别是涉及空调器及其室内机自清洁控制方法。The invention relates to a household air conditioner, in particular to an air conditioner and a self-cleaning control method thereof.
背景技术Background technique
空调器长时间放置或使用后，室内机会存在大量的尘垢。这些尘垢附着在室内机的换热器上，一方面会降低换热器的换热性能，导致空调器性能下降，导致能耗提高；另一方面，尘垢附着容易滋生细菌，形成霉斑，这些细菌和霉斑会在机组内产生异味，如不及时清理，严重威胁着空调器用户的健康。After the air conditioner is placed or used for a long time, there is a large amount of dust in the indoor opportunity. These dusts adhere to the heat exchanger of the indoor unit, which on the one hand will reduce the heat exchange performance of the heat exchanger, resulting in a decrease in the performance of the air conditioner, resulting in an increase in energy consumption; on the other hand, dust adhesion tends to breed bacteria and form mildew spots. Bacteria and mildew can cause odors in the unit. If not cleaned up in time, it will seriously threaten the health of air conditioner users.
传统空调采取的方案一般为定期进行清洗，给用户使用带来了严重不便，因此为了解决空调器的换热器上附着尘垢而带来的上述问题，现有技术出现了利用换热器作为蒸发器使用时产生冷凝水、通过冷凝水带走换热器表面的尘垢的技术手段，实现空调器室内机换热器的自清洁。The conventional air-conditioning scheme is generally cleaned regularly, which brings serious inconvenience to the user. Therefore, in order to solve the above problems caused by the adhesion of dust on the heat exchanger of the air conditioner, the prior art has used the heat exchanger as the evaporation. When the device is used, the condensed water is generated, and the condensed water is taken away to remove the dirt on the surface of the heat exchanger, thereby realizing self-cleaning of the heat exchanger of the indoor unit of the air conditioner.
然而上述利用冷凝水进行空调器室内机换热器清洁的方案，在实际使用过程中会对空调器正常的制冷或制热造成影响，例如在制热过程中，导致室内温度波动，给用户带来不适，影响了用户使用体验。However, the above scheme for cleaning the indoor unit heat exchanger of the air conditioner by using the condensed water may affect the normal cooling or heating of the air conditioner during the actual use, for example, during the heating process, causing the indoor temperature fluctuation to be brought to the user. Discomfort has affected the user experience.
发明内容Summary of the invention
本发明的一个目的提供一种至少解决上述部分技术问题的具有自清洁功能的空调器及其控制方法。An object of the present invention is to provide an air conditioner having a self-cleaning function and a control method thereof, which solve at least some of the above technical problems.
本发明一个进一步的目的是要在制热过程中减少自清洁给温度造成较大的波动。A further object of the present invention is to reduce the self-cleaning of the self-cleaning to cause large fluctuations in temperature during the heating process.
根据本发明的一个方面，提供了一种空调器的室内机自清洁控制方法，其中空调器的制冷系统包括由制冷剂管路依次串接的室内机换热组件、制冷剂流向切换装置、压缩机、室外机换热组件、以及节流装置，其中室内机换热组件包括：串接的第一室内换热器以及第二室内换热器，其中第二室内换热器通过制冷剂流向切换装置连接至压缩机，第一室内换热器和第二室内换热器之间设置有电子膨胀阀，并且控制方法包括：接收空调器开启自清洁功能的触发信号；将制冷剂流向切换装置调整至压缩机向室内机换热组件提供压缩制冷剂的状态；通过调节电子膨胀阀的开度，使得第一室内换热器先制冷再制热，以在制冷阶段使其表面持续结霜，并在制热阶段进行化霜，利用化霜形成的水带走附着的污染物，实现第一室内换热器的自清洁。According to an aspect of the present invention, an indoor unit self-cleaning control method for an air conditioner is provided, wherein the refrigeration system of the air conditioner includes an indoor unit heat exchange assembly sequentially connected by a refrigerant line, a refrigerant flow direction switching device, and compression The machine, the outdoor unit heat exchange component, and the throttling device, wherein the indoor unit heat exchange component comprises: a first indoor heat exchanger connected in series and a second indoor heat exchanger, wherein the second indoor heat exchanger is switched by a refrigerant flow direction The device is connected to the compressor, and an electronic expansion valve is disposed between the first indoor heat exchanger and the second indoor heat exchanger, and the control method comprises: receiving a trigger signal for the air conditioner to open the self-cleaning function; adjusting the refrigerant flow to the switching device The compressor supplies the compressed refrigerant to the indoor unit heat exchange component; by adjusting the opening of the electronic expansion valve, the first indoor heat exchanger is cooled and then heated to continuously frost the surface during the refrigeration phase, and The defrosting is carried out in the heating stage, and the water formed by the defrosting is used to take away the attached contaminants to achieve self-cleaning of the first indoor heat exchanger.
可选地，通过调节电子膨胀阀的开度，使得第一室内换热器先制冷再制热的步骤包括：检测第一室内换热器的温度；根据第一室内换热器的温度调节电子膨胀阀的开度，使得第一室内换热器的温度下降至第一设定温度；保持第一室内换热器的温度下降至第一设定温度时电子膨胀阀的开度，使第一室内换热器表面持续结霜，直至满足设定的第一化霜条件；在满足第一化霜条件后，使电子膨胀阀的开度打开至最大，使第一室内换热器释放热量，以进行化霜。Optionally, the step of first cooling and reheating the first indoor heat exchanger by adjusting the opening degree of the electronic expansion valve comprises: detecting the temperature of the first indoor heat exchanger; adjusting the electron according to the temperature of the first indoor heat exchanger The opening degree of the expansion valve causes the temperature of the first indoor heat exchanger to drop to a first set temperature; maintaining the opening degree of the electronic expansion valve when the temperature of the first indoor heat exchanger drops to the first set temperature, so that the first The surface of the indoor heat exchanger is continuously frosted until the set first defrosting condition is satisfied; after the first defrosting condition is satisfied, the opening of the electronic expansion valve is opened to the maximum, so that the first indoor heat exchanger releases heat. To carry out defrosting.
可选地，第一化霜条件包括：第一室内换热器的温度下降至第二设定温度或者电子 膨胀阀的开度保持的时间超过第一设定时间，第二设定温度低于第一设定温度。Optionally, the first defrosting condition comprises: the temperature of the first indoor heat exchanger drops to a second set temperature or the opening of the electronic expansion valve is maintained for more than a first set time, and the second set temperature is lower than The first set temperature.
可选地，在第一室内换热器完成自清洁后，还包括：将制冷剂流向切换装置调整至压缩机向室外机换热组件提供压缩制冷剂的状态；通过调节电子膨胀阀的开度，使得第二室内换热器制冷，从在其表面持续结霜；在满足预设的第二化霜条件后，将制冷剂流向切换装置调整至压缩机向室内机换热组件提供压缩制冷剂的状态，并使电子膨胀阀的开度打开至最大，使第二室内换热器释放热量，利用化霜形成的水带走附着的污染物，实现第二室内换热器的自清洁。Optionally, after the first indoor heat exchanger completes the self-cleaning, the method further includes: adjusting the flow of the refrigerant to the switching device to a state in which the compressor supplies the compressed refrigerant to the outdoor heat exchange component; and adjusting the opening of the electronic expansion valve , the second indoor heat exchanger is cooled, and the frost is continuously formed on the surface thereof; after the preset second defrosting condition is satisfied, the refrigerant flows to the switching device to adjust the compressor to provide the compressed refrigerant to the indoor unit heat exchange component. The state of the electronic expansion valve is opened to the maximum, so that the second indoor heat exchanger releases heat, and the water formed by the defrosting removes the attached contaminants to achieve self-cleaning of the second indoor heat exchanger.
可选地，通过调节电子膨胀阀的开度，使得第二室内换热器制冷的步骤包括：检测第二室内换热器的温度；根据第二室内换热器的温度调节电子膨胀阀的开度，使得第二室内换热器的温度下降至第三设定温度；保持第二室内换热器的温度下降至第三设定温度时电子膨胀阀的开度，使第二室内换热器表面持续结霜，直至满足第二化霜条件。Optionally, the step of cooling the second indoor heat exchanger by adjusting the opening degree of the electronic expansion valve comprises: detecting the temperature of the second indoor heat exchanger; adjusting the opening of the electronic expansion valve according to the temperature of the second indoor heat exchanger Degree, the temperature of the second indoor heat exchanger is lowered to a third set temperature; the opening of the electronic expansion valve is maintained when the temperature of the second indoor heat exchanger is lowered to the third set temperature, so that the second indoor heat exchanger The surface continues to frost until the second defrosting condition is met.
可选地，第二化霜条件包括：第二室内换热器的温度下降至第四设定温度或者电子膨胀阀的开度保持的时间超过第二设定时间；第四设定温度低于第三设定温度。Optionally, the second defrosting condition comprises: the temperature of the second indoor heat exchanger drops to a fourth set temperature or the opening of the electronic expansion valve is maintained for more than a second set time; the fourth set temperature is lower than The third set temperature.
可选地，在接收空调器开启自清洁功能的触发信号之后还包括：测量空调器室内机的工作环境温度；在工作环境温度低于第五设定温度时，将电子膨胀阀置于受控状态，并执行第一室内换热器先制冷再制热的过程；在工作环境温度高于第五设定温度时，保持电子膨胀阀的初始开启状态，并执行室内机换热组件的整体自清洁过程。Optionally, after receiving the trigger signal of the air conditioner to turn on the self-cleaning function, the method further comprises: measuring a working environment temperature of the indoor unit of the air conditioner; and placing the electronic expansion valve under controlled when the working environment temperature is lower than the fifth set temperature State, and perform the process of first cooling and then heating the first indoor heat exchanger; when the working environment temperature is higher than the fifth set temperature, maintaining the initial opening state of the electronic expansion valve, and executing the overall self-heating of the indoor heat exchange component Cleaning process.
根据本发明的另一个方面，还提供了一种空调器，其包括制冷系统和自清洁控制器，其中制冷系统包括：由制冷剂管路依次串接的室内机换热组件、制冷剂流向切换装置、压缩机、室外机换热组件、以及节流装置，其中室内机换热组件包括：串接的第一室内换热器以及第二室内换热器，其中第二室内换热器通过制冷剂流向切换装置连接至压缩机，第一室内换热器和第二室内换热器之间设置有电子膨胀阀；自清洁控制器，与制冷系统电连接，并配置成：接收空调器开启自清洁功能的触发信号；将制冷剂流向切换装置调整至压缩机向室内机换热组件提供压缩制冷剂的状态；通过调节电子膨胀阀的开度，使得第一室内换热器先制冷再制热，以在制冷阶段使其表面持续结霜，并在制热阶段进行化霜，利用化霜形成的水带走附着的污染物，实现第一室内换热器的自清洁。According to another aspect of the present invention, there is also provided an air conditioner comprising a refrigeration system and a self-cleaning controller, wherein the refrigeration system comprises: an indoor unit heat exchange component serially connected by a refrigerant pipeline, and a refrigerant flow direction switching The device, the compressor, the outdoor unit heat exchange component, and the throttle device, wherein the indoor unit heat exchange assembly comprises: a first indoor heat exchanger connected in series and a second indoor heat exchanger, wherein the second indoor heat exchanger passes the refrigeration The agent flow switching device is connected to the compressor, and an electronic expansion valve is disposed between the first indoor heat exchanger and the second indoor heat exchanger; the self-cleaning controller is electrically connected to the refrigeration system, and is configured to: receive the air conditioner to open from The trigger signal of the cleaning function; the refrigerant flow is adjusted to the switching device to adjust the state in which the compressor supplies the compressed refrigerant to the indoor unit heat exchange component; and the first indoor heat exchanger is cooled and then heated by adjusting the opening degree of the electronic expansion valve In order to achieve continuous frosting on the surface during the refrigeration phase, and defrosting in the heating stage, the water formed by the defrosting is used to carry away the attached pollutants to achieve the first indoor heat exchange. Self-cleaning.
可选地，自清洁控制器还配置成：检测第一室内换热器的温度；根据第一室内换热器的温度调节电子膨胀阀的开度，使得第一室内换热器的温度下降至第一设定温度；保持第一室内换热器的温度下降至第一设定温度时所述电子膨胀阀的开度，使第一室内换热器表面持续结霜，直至满足设定的第一化霜条件；在满足第一化霜条件后，使电子膨胀阀的开度打开至最大，使第一室内换热器释放热量，以进行化霜，第一化霜条件包括：第一室内换热器的温度下降至第二设定温度或者电子膨胀阀的开度保持的时间超过第一设定时间，第二设定温度低于第一设定温度。Optionally, the self-cleaning controller is further configured to: detect a temperature of the first indoor heat exchanger; adjust an opening degree of the electronic expansion valve according to a temperature of the first indoor heat exchanger, so that a temperature of the first indoor heat exchanger is lowered to a first set temperature; maintaining an opening degree of the electronic expansion valve when the temperature of the first indoor heat exchanger drops to a first set temperature, so that the surface of the first indoor heat exchanger is continuously frosted until the set condition is satisfied a defrosting condition; after satisfying the first defrosting condition, the opening of the electronic expansion valve is opened to the maximum, so that the first indoor heat exchanger releases heat for defrosting, and the first defrosting condition includes: the first indoor The temperature of the heat exchanger drops to the second set temperature or the opening of the electronic expansion valve is maintained for more than the first set time, and the second set temperature is lower than the first set temperature.
可选地，自清洁控制器还配置成：在第一室内换热器完成自清洁后，将制冷剂流向切换装置调整至压缩机向室外机换热组件提供压缩制冷剂的状态；检测第二室内换热器的温度；根据第二室内换热器的温度调节电子膨胀阀的开度，使得第二室内换热器的温度下降至第三设定温度；保持第二室内换热器的温度下降至第三设定温度时电子膨胀阀的开度，使第二室内换热器表面持续结霜，直至满足预设的第二化霜条件；在满足第二化霜条件后，将制冷剂流向切换装置调整至压缩机向室内机换热组件提供压缩制冷剂的 状态，并使电子膨胀阀的开度打开至最大，使第二室内换热器释放热量，利用化霜形成的水带走附着的污染物，实现第二室内换热器的自清洁，第二化霜条件包括：第二室内换热器的温度下降至第四设定温度或者电子膨胀阀的开度保持的时间超过第二设定时间；第四设定温度低于第三设定温度。Optionally, the self-cleaning controller is further configured to: after the first indoor heat exchanger completes self-cleaning, adjust the flow of the refrigerant to the switching device to provide a state in which the compressor supplies the compressed refrigerant to the outdoor heat exchange component; and detect the second The temperature of the indoor heat exchanger; adjusting the opening degree of the electronic expansion valve according to the temperature of the second indoor heat exchanger, so that the temperature of the second indoor heat exchanger is lowered to the third set temperature; maintaining the temperature of the second indoor heat exchanger Decrease the opening degree of the electronic expansion valve when the temperature is lowered to the third set temperature, so that the surface of the second indoor heat exchanger is continuously frosted until the preset second defrosting condition is satisfied; after the second defrosting condition is satisfied, the refrigerant is The flow direction switching device adjusts to a state in which the compressor supplies compressed refrigerant to the indoor unit heat exchange component, and opens the opening of the electronic expansion valve to the maximum, so that the second indoor heat exchanger releases heat, and takes away the water formed by the defrosting The attached pollutants realize self-cleaning of the second indoor heat exchanger, and the second defrosting condition includes: the temperature of the second indoor heat exchanger drops to the fourth set temperature or the opening of the electronic expansion valve is maintained for a longer time The second set time is exceeded; the fourth set temperature is lower than the third set temperature.
可选地，自清洁控制器还配置成：在接收空调器开启自清洁功能的触发信号之后，测量空调器室内机的工作环境温度；在工作环境温度低于第五设定温度时，将电子膨胀阀置于受控状态，并执行第一室内换热器先制冷再制热的过程；在工作环境温度高于第五设定温度时，保持电子膨胀阀的初始开启状态，并执行室内机换热组件的整体自清洁过程。Optionally, the self-cleaning controller is further configured to: after receiving the trigger signal that the air conditioner turns on the self-cleaning function, measure the working environment temperature of the indoor unit of the air conditioner; and when the working environment temperature is lower than the fifth set temperature, the electronic The expansion valve is placed in a controlled state, and the first indoor heat exchanger is first cooled and then heated; when the working environment temperature is higher than the fifth set temperature, the initial opening state of the electronic expansion valve is maintained, and the indoor unit is executed The overall self-cleaning process of the heat exchange components.
本发明的空调器及其室内机自清洁控制方法，尤其适用于空调器运行于制热状态下，对室内机换热组件的结构进行了改进，设置了串接的第一室内换热器以及第二室内换热器，并在第一室内换热器以及第二室内换热器之间增加了电子膨胀阀，通过调节制冷剂的流向以及电子膨胀阀的开度，分别进行第一室内换热器以及第二室内换热器分别执行自清洁过程，相比于现有技术中的室内机换热组件整体进行自清洁过程，减小了对工作环境温度的影响，防止出现温度的剧烈波动，给用户带来了更佳的使用体验。The air conditioner and the indoor unit self-cleaning control method thereof are especially suitable for the air conditioner operating in a heating state, and the structure of the indoor unit heat exchange component is improved, and the first indoor heat exchanger connected in series is arranged a second indoor heat exchanger, and an electronic expansion valve is added between the first indoor heat exchanger and the second indoor heat exchanger, and the first indoor exchange is respectively performed by adjusting the flow direction of the refrigerant and the opening degree of the electronic expansion valve The heat exchanger and the second indoor heat exchanger respectively perform a self-cleaning process, and the self-cleaning process of the indoor heat exchanger component in the prior art is reduced, thereby reducing the influence on the working environment temperature and preventing the temperature from fluctuating. , to bring a better user experience.
进一步地，本发明的空调器及其室内机自清洁控制方法，对第一室内换热器以及第二室内换热器各自的自清洁流程进行了优化，耗费的时间更少，自清洁效果更好。Further, the air conditioner of the present invention and the indoor unit self-cleaning control method optimize the self-cleaning process of the first indoor heat exchanger and the second indoor heat exchanger, which takes less time and has a self-cleaning effect. it is good.
更进一步地，本发明的空调器及其室内机自清洁控制方法，可以根据室内机的工作环境确定自清洁的方案，选择室内机换热组件整体自清洁或者第一室内换热器以及第二室内换热器分别进行自清洁，在保证用户舒适的情况下，节省自清洁的过程和用电能耗。Furthermore, the air conditioner of the present invention and the indoor unit self-cleaning control method thereof can determine a self-cleaning scheme according to the working environment of the indoor unit, and select the indoor self-cleaning unit or the first indoor heat exchanger and the second The indoor heat exchangers are separately self-cleaning, which saves the self-cleaning process and the energy consumption of electricity when the user is comfortable.
根据下文结合附图对本发明具体实施例的详细描述，本领域技术人员将会更加明了本发明的上述以及其他目的、优点和特征。The above as well as other objects, advantages and features of the present invention will become apparent to those skilled in the <
附图说明DRAWINGS
后文将参照附图以示例性而非限制性的方式详细描述本发明的一些具体实施例。附图中相同的附图标记标示了相同或类似的部件或部分。本领域技术人员应该理解，这些附图未必是按比例绘制的。附图中：Some specific embodiments of the present invention will be described in detail, by way of example, and not limitation, The same reference numbers in the drawings identify the same or similar parts. Those skilled in the art should understand that the drawings are not necessarily drawn to scale. In the figure:
图1是根据本发明一个实施例的空调器的示意性功能框图；1 is a schematic functional block diagram of an air conditioner according to an embodiment of the present invention;
图2是根据本发明一个实施例的空调器的制冷系统的示意图；2 is a schematic diagram of a refrigeration system of an air conditioner according to an embodiment of the present invention;
图3是根据本发明一个实施例的空调器的室内机自清洁控制方法的示意图；3 is a schematic diagram of an indoor unit self-cleaning control method of an air conditioner according to an embodiment of the present invention;
图4是根据本发明一个实施例的空调器的室内机自清洁控制方法中实现第一室内换热器的自清洁的流程图；4 is a flow chart of realizing self-cleaning of a first indoor heat exchanger in an indoor unit self-cleaning control method of an air conditioner according to an embodiment of the present invention;
图5是根据本发明一个实施例的空调器的室内机自清洁控制方法中实现第二室内换热器的自清洁的流程图；以及5 is a flow chart for realizing self-cleaning of a second indoor heat exchanger in an indoor unit self-cleaning control method of an air conditioner according to an embodiment of the present invention;
图6是根据本发明一个具体实施例的空调器的室内机自清洁控制方法的具体实施流程图。6 is a flow chart showing a specific implementation of an indoor unit self-cleaning control method for an air conditioner according to an embodiment of the present invention.
具体实施方式Detailed ways
图1是根据本发明一个实施例的空调器10的示意性功能框图。图2是根据本发明一 个实施例的空调器10的制冷系统的示意图。1 is a schematic functional block diagram of an air conditioner 10 in accordance with one embodiment of the present invention. 2 is a schematic diagram of a refrigeration system of an air conditioner 10 in accordance with an embodiment of the present invention.
该空调器10一般性地可以包括空调器室内机100以及空调器室外机200，空调器室内机100以及空调器室外机200通过有效的配合运转，完成空调的制冷和制热循环，从而实现居室内温度的冷热调节。空调器10的制冷系统可以利用压缩制冷循环来实现，压缩制冷循环利用制冷剂在压缩机250、冷凝器、蒸发器、节流装置240的压缩相变循环实现热量的传递。制冷系统还可以设置制冷剂流向切换装置260，改变制冷剂的流向，使室室内机换热组件110交替作为蒸发器或冷凝器，实现制冷或者制热功能，制冷剂流向切换装置260一般采用四通阀来实现。The air conditioner 10 may generally include an air conditioner indoor unit 100 and an air conditioner outdoor unit 200. The air conditioner indoor unit 100 and the air conditioner outdoor unit 200 complete an air conditioning refrigeration and heating cycle by an effective cooperative operation, thereby realizing a living room. The internal temperature is regulated by heat and cold. The refrigeration system of the air conditioner 10 can be realized by a compression refrigeration cycle that utilizes a compression phase change cycle of the refrigerant in the compressor 250, the condenser, the evaporator, and the throttle device 240 to achieve heat transfer. The refrigeration system may further be provided with a refrigerant flow switching device 260 to change the flow direction of the refrigerant, so that the indoor unit heat exchange unit 110 alternately functions as an evaporator or a condenser to realize a cooling or heating function, and the refrigerant flow direction switching device 260 generally adopts four. Through the valve to achieve.
压缩制冷循环的工作原理为：压缩机250是制冷循环的动力，它由电动机拖动而不停地旋转，它除了及时抽出蒸发器内蒸气，维持低温低压外，还通过压缩作用提高制冷剂蒸气的压力和温度，创造将制冷剂蒸气的热量向外界环境介质转移的条件。即将低温低压制冷剂蒸气压缩至高温高压状态。The working principle of the compression refrigeration cycle is: the compressor 250 is the power of the refrigeration cycle, which is driven by the motor to rotate without stopping. In addition to timely withdrawing the vapor in the evaporator, maintaining the low temperature and low pressure, the refrigerant vapor is also increased by the compression action. The pressure and temperature create conditions that transfer the heat of the refrigerant vapor to the ambient medium. The low temperature and low pressure refrigerant vapor is compressed to a high temperature and high pressure state.
冷凝器是一个热交换设备，作用是利用环境冷却制冷剂，将来自压缩机250的高温高压制冷蒸气的热量带走，使高温高压制冷剂蒸气冷却、冷凝成高压常温的制冷剂液体。The condenser is a heat exchange device, which uses the environment to cool the refrigerant, removes the heat of the high-temperature high-pressure refrigerant vapor from the compressor 250, and cools and condenses the high-temperature high-pressure refrigerant vapor into a high-pressure normal temperature refrigerant liquid.
高压常温的制冷剂液体直接送入蒸发器、根据饱和压力与饱和温度——对应原理，降低制冷剂液体的压力，从而降低制冷剂液体的温度。将高压常温的制冷剂液体通过节流装置240，得到低温低压制冷剂，再送入蒸发器内吸热蒸发。在空调器10中一般可以采用毛细管作为节流装置240。The high-pressure normal temperature refrigerant liquid is directly sent to the evaporator, and according to the saturation pressure and the saturation temperature-corresponding principle, the pressure of the refrigerant liquid is lowered, thereby lowering the temperature of the refrigerant liquid. The high-pressure normal temperature refrigerant liquid is passed through the throttling device 240 to obtain a low-temperature low-pressure refrigerant, which is then sent to the evaporator for absorption by heat. A capillary tube can generally be used as the throttle device 240 in the air conditioner 10.
蒸发器也是一个热交换设备。节流后的低温低压制冷剂液体在其内蒸发(沸腾)变为蒸气，吸收周围热量，使周围温度下降。The evaporator is also a heat exchange device. The low-temperature and low-pressure refrigerant liquid after the throttling evaporates (boiling) into vapor, absorbs the surrounding heat, and lowers the ambient temperature.
制冷剂流向切换装置260用于切换压缩制冷循环中制冷剂的流向，例如在空调器10制热过程中，压缩机250向室内机换热组件110提供压缩制冷剂，将室内机换热组件110作为冷凝器，制冷剂经过室内机换热组件110的冷凝后，通过节流装置240送入室外机换热组件210，室外机换热组件210吸收外部热量，然后将制冷剂重新送入压缩机250。在空调器10制冷过程中，压缩机250向室外机换热组件210提供压缩制冷剂，将室外机换热组件210作为冷凝器，制冷剂经过室外机换热组件210的冷凝后，通过节流装置240送入室内机换热组件110，室内机换热组件110吸收外部热量，冷却周围的空气，达到对空气降温、除湿的作用，然后将制冷剂重新送入压缩机250。The refrigerant flow direction switching device 260 is configured to switch the flow direction of the refrigerant in the compression refrigeration cycle. For example, during the heating process of the air conditioner 10, the compressor 250 supplies the compressed refrigerant to the indoor unit heat exchange assembly 110, and the indoor unit heat exchange assembly 110 As a condenser, the refrigerant is condensed by the indoor unit heat exchange unit 110, sent to the outdoor unit heat exchange unit 210 through the throttle unit 240, and the outdoor unit heat exchange unit 210 absorbs external heat, and then the refrigerant is re-sent to the compressor. 250. During the refrigeration of the air conditioner 10, the compressor 250 supplies compressed refrigerant to the outdoor unit heat exchange unit 210, and the outdoor unit heat exchange unit 210 serves as a condenser. After the refrigerant passes through the outdoor unit heat exchange unit 210, the refrigerant is throttled. The device 240 is sent to the indoor unit heat exchange unit 110. The indoor unit heat exchange unit 110 absorbs external heat, cools the surrounding air, and cools and dehumidifies the air, and then re-feeds the refrigerant into the compressor 250.
另外制冷系统中的室内机风机120和室外机风机220分别产生与室内机换热组件110和室外机换热组件210进行热交换的气流。Further, the indoor unit fan 120 and the outdoor unit fan 220 in the refrigeration system respectively generate an air flow for exchanging heat with the indoor unit heat exchange unit 110 and the outdoor unit heat exchange unit 210.
由于空调器10在使用放置过程中，会在室内机换热组件110和室外机换热组件210上积攒灰尘，空调器10成为所在环境中潜在的污染源，例如在一些测试中，发现长期未清洁的室内机换热组件110的污染程度非常惊人，这会给用户带来极大的健康风险。基于上述问题，现有技术中出现的自清洁技术，通过结霜使污垢剥离蒸发器迅速瓦解灰尘污垢，然后化霜的水冲洗室内机换热组件110，以达到清洁的目的，这种技术实际实施过程中，需要首先使室内机换热组件110收集周围环境的水分，这必然需要使得室内机换热组件110工作于蒸发器状态。如果制热过程中进行自清洁必然导致空调器室内机100输出冷风，降低工作环境的温度，给用户带来不舒适的感觉。Since the air conditioner 10 accumulates dust on the indoor unit heat exchange unit 110 and the outdoor unit heat exchange unit 210 during use, the air conditioner 10 becomes a potential source of pollution in the environment, for example, in some tests, it is found to be unclean for a long time. The degree of contamination of the indoor unit heat exchange assembly 110 is very alarming, which poses a great health risk to the user. Based on the above problems, the self-cleaning technology appearing in the prior art rapidly disintegrates the dirt and dirt by peeling off the dirt by the frosting, and then the defrosted water rinses the indoor unit heat exchange component 110 to achieve the purpose of cleaning. During the implementation, the indoor unit heat exchange assembly 110 needs to first collect the moisture of the surrounding environment, which necessarily requires the indoor unit heat exchange assembly 110 to operate in the evaporator state. If the self-cleaning process during the heating process inevitably causes the air conditioner indoor unit 100 to output cold air, the temperature of the working environment is lowered, and the user feels uncomfortable.
本实施例的空调器10针对上述问题，采取以下结构改进：室内机换热组件110包括： 串接的第一室内换热器111以及第二室内换热器112，其中第二室内换热器112通过制冷剂流向切换装置260连接至压缩机250，第一室内换热器111和第二室内换热器112之间设置有电子膨胀阀130。第一室内换热器111通过节流装置240连通至室外机换热组件210。电子膨胀阀130的正常工作过程中保持打开状态，不会对制冷或制热造成影响，在进行自清洁过程中，电子膨胀阀130的开度可受控的调节。The air conditioner 10 of the present embodiment adopts the following structural improvement for the above problem: the indoor unit heat exchange assembly 110 includes: a first indoor heat exchanger 111 and a second indoor heat exchanger 112 connected in series, wherein the second indoor heat exchanger 112 is connected to the compressor 250 through the refrigerant flow switching device 260, and an electronic expansion valve 130 is disposed between the first indoor heat exchanger 111 and the second indoor heat exchanger 112. The first indoor heat exchanger 111 is connected to the outdoor unit heat exchange assembly 210 through the throttle device 240. The electronic expansion valve 130 is kept open during normal operation, and does not affect cooling or heating. During the self-cleaning process, the opening degree of the electronic expansion valve 130 can be controlled.
本实施例的空调器10还设置了自清洁控制器150，该自清洁控制器150可以由空调器10原有的控制板通过配置自清洁控制程序或者通过预置自清洁控制逻辑来实现，由于自清洁控制器150本身硬件构造为本领域技术人员所习知的，在此不不做赘述。The air conditioner 10 of the embodiment is further provided with a self-cleaning controller 150, which can be realized by the original control panel of the air conditioner 10 by configuring a self-cleaning control program or by preset self-cleaning control logic, The hardware configuration of the self-cleaning controller 150 itself is well known to those skilled in the art and will not be described herein.
自清洁控制器150进行自清洁控制的过程为：接收空调器10开启自清洁功能的触发信号(例如接收到用户通过遥控器或者空调器10人机交互接口下发的自清洁控制指令，或者空调器10根据自身工作状态确定需要进行自清洁而产生的触发指令)；在接收到上述触发信号后将制冷剂流向切换装置260调整至压缩机250向室内机换热组件110提供压缩制冷剂的状态(也即切换至空调器10的制热状态，若已处于制热状态，则保持该状态)；通过调节电子膨胀阀130的开度，使得第一室内换热器111先制冷再制热，以在制冷阶段使其表面持续结霜，并在制热阶段进行化霜，利用化霜形成的水带走附着的污染物，实现第一室内换热器111的自清洁。The process of self-cleaning control by the self-cleaning controller 150 is: receiving a trigger signal for the air conditioner 10 to turn on the self-cleaning function (for example, receiving a self-cleaning control command issued by the user through the remote controller or the human-machine interaction interface of the air conditioner 10, or an air conditioner) The device 10 determines a trigger command generated by self-cleaning according to the working state thereof; and after the receiving the trigger signal, adjusts the flow of the refrigerant to the switching device 260 to the state in which the compressor 250 supplies the compressed refrigerant to the indoor unit heat exchange assembly 110. (that is, switching to the heating state of the air conditioner 10, if it is already in the heating state, maintaining the state); by adjusting the opening degree of the electronic expansion valve 130, the first indoor heat exchanger 111 is first cooled and then heated. The self-cleaning of the first indoor heat exchanger 111 is achieved by continuously frosting the surface during the cooling phase and performing defrosting during the heating phase, and the water formed by the defrosting is used to carry away the adhered contaminants.
自清洁控制器150通过调节电子膨胀阀130的开度，使得第一室内换热器111先制冷再制热的过程具体为：检测第一室内换热器111的温度(例如第一室内换热器111的盘管温度)；根据第一室内换热器111的温度调节电子膨胀阀130的开度，使得第一室内换热器111的温度下降至第一设定温度；保持第一室内换热器111的温度下降至第一设定温度时电子膨胀阀130的开度，使第一室内换热器111表面持续结霜，直至满足设定的第一化霜条件；在满足第一化霜条件后，使电子膨胀阀130的开度打开至最大，使第一室内换热器111释放热量，以进行化霜。上述第一化霜条件包括：第一室内换热器111的温度下降至第二设定温度或者电子膨胀阀130的开度保持的时间超过第一设定时间，第二设定温度低于第一设定温度。The self-cleaning controller 150 adjusts the opening degree of the electronic expansion valve 130 such that the first indoor heat exchanger 111 first cools and reheats the heat, specifically: detecting the temperature of the first indoor heat exchanger 111 (for example, the first indoor heat exchange) Adjusting the opening degree of the electronic expansion valve 130 according to the temperature of the first indoor heat exchanger 111, so that the temperature of the first indoor heat exchanger 111 is lowered to the first set temperature; maintaining the first indoor change When the temperature of the heater 111 drops to the first set temperature, the opening degree of the electronic expansion valve 130 causes the surface of the first indoor heat exchanger 111 to continue to frost until the set first defrosting condition is satisfied; After the frost condition, the opening degree of the electronic expansion valve 130 is opened to the maximum, and the first indoor heat exchanger 111 releases heat to perform defrosting. The first defrosting condition includes: the temperature of the first indoor heat exchanger 111 drops to the second set temperature or the opening of the electronic expansion valve 130 is maintained for more than the first set time, and the second set temperature is lower than the first set time A set temperature.
电子膨胀阀130在调节开度后，可以实现节流作用，使得使高温高压制冷剂蒸气在第二室内换热器112内冷却，然后经过电子膨胀阀130的节流，得到低温低压制冷剂，相当于此时第一换热器与室外机换热组件210共同作为蒸发器进行制冷，使得第一换热器对周围空气中的水分进行冷凝，并在自身表面开始结霜。After adjusting the opening degree, the electronic expansion valve 130 can achieve a throttling effect, so that the high-temperature high-pressure refrigerant vapor is cooled in the second indoor heat exchanger 112, and then throttled by the electronic expansion valve 130 to obtain a low-temperature low-pressure refrigerant. Corresponding to this time, the first heat exchanger and the outdoor unit heat exchange unit 210 together perform cooling as an evaporator, so that the first heat exchanger condenses moisture in the surrounding air and starts frosting on the surface thereof.
第一室内换热器111的温度下降至第一设定温度后，电子膨胀阀130保持当前开度，使第一室内换热器111表面持续结霜，直至满足设定的第一化霜条件(第一室内换热器111的温度下降至第二设定温度或者电子膨胀阀130的开度保持的时间超过第一设定时间)。在满足上述第一化霜条件后，可以认为第一换热器已经结霜完成。并且在第一换热器结霜过程中，压缩机250可以维持其运转频率不便，并关闭室内机风机120和室外机风机220。After the temperature of the first indoor heat exchanger 111 drops to the first set temperature, the electronic expansion valve 130 maintains the current opening degree, so that the surface of the first indoor heat exchanger 111 continues to frost until the set first defrosting condition is satisfied. (The temperature of the first indoor heat exchanger 111 drops to the second set temperature or the opening of the electronic expansion valve 130 is maintained for more than the first set time). After the first defrosting condition described above is satisfied, it can be considered that the first heat exchanger has been frosted. And during the frosting of the first heat exchanger, the compressor 250 can maintain its inconvenient operating frequency and turn off the indoor unit fan 120 and the outdoor unit fan 220.
自清洁控制器150在确定达到第一化霜条件后，使电子膨胀阀130的开度打开至最大(打开速度需要尽快)，使第一室内换热器111改为以冷凝器状态运行，从而释放热量，以进行化霜，利用化霜形成的水带走附着的污染物，实现第一室内换热器111的自清洁。After the self-cleaning controller 150 determines that the first defrosting condition is reached, the opening degree of the electronic expansion valve 130 is opened to the maximum (the opening speed needs to be as soon as possible), so that the first indoor heat exchanger 111 is operated in the condenser state, thereby The heat is released to perform defrosting, and the water formed by the defrosting is used to carry away the adhered contaminants, thereby achieving self-cleaning of the first indoor heat exchanger 111.
在上述过程中第二室内换热器112可以保持制热状态，有效地减小了第一室内换热 器111对周围环境的影响，避免了输出冷风给用户带来的不舒适感。In the above process, the second indoor heat exchanger 112 can maintain the heating state, effectively reducing the influence of the first indoor heat exchanger 111 on the surrounding environment, and avoiding the uncomfortable feeling brought by the output cold air to the user.
自清洁控制器150在完成第一室内换热器111的自清洁过程后，还可以继续执行第二室内换热器112的自清洁过程，具体包括：将制冷剂流向切换装置调整至压缩机250向室外机换热组件210提供压缩制冷剂的状态(相当于空调器10的制冷状态)；检测第二室内换热器112的温度；根据第二室内换热器112的温度调节电子膨胀阀130的开度，使得第二室内换热器112的温度下降至第三设定温度；保持第二室内换热器112的温度下降至第三设定温度时电子膨胀阀130的开度，使第二室内换热器112表面持续结霜，直至满足预设的第二化霜条件；在满足第二化霜条件后，将制冷剂流向切换装置调整至压缩机250向室内机换热组件110提供压缩制冷剂的状态，并使电子膨胀阀130的开度打开至最大，使第二室内换热器112释放热量，利用化霜形成的水带走附着的污染物，实现第二室内换热器112的自清洁，第二化霜条件包括：第二室内换热器112的温度下降至第四设定温度或者电子膨胀阀130的开度保持的时间超过第二设定时间；第四设定温度低于第三设定温度。After the self-cleaning process of the first indoor heat exchanger 111 is completed, the self-cleaning controller 150 may further perform the self-cleaning process of the second indoor heat exchanger 112, specifically including: adjusting the flow of the refrigerant to the switching device to the compressor 250. The state of the compressed refrigerant is supplied to the outdoor unit heat exchange unit 210 (corresponding to the cooling state of the air conditioner 10); the temperature of the second indoor heat exchanger 112 is detected; and the electronic expansion valve 130 is adjusted according to the temperature of the second indoor heat exchanger 112. The opening degree causes the temperature of the second indoor heat exchanger 112 to drop to a third set temperature; maintaining the opening degree of the electronic expansion valve 130 when the temperature of the second indoor heat exchanger 112 drops to the third set temperature, so that The surface of the indoor heat exchanger 112 continues to frost until the preset second defrosting condition is satisfied; after the second defrosting condition is satisfied, the refrigerant flow is adjusted to the switching device to the compressor 250 to provide the indoor unit heat exchange assembly 110. The state of the refrigerant is compressed, and the opening degree of the electronic expansion valve 130 is opened to the maximum, so that the second indoor heat exchanger 112 releases heat, and the water formed by the defrosting is used to carry away the attached pollutants to realize the second indoor heat exchanger. 112 Self-cleaning, the second defrosting condition includes: the temperature of the second indoor heat exchanger 112 drops to a fourth set temperature or the opening of the electronic expansion valve 130 is maintained for more than a second set time; the fourth set temperature Below the third set temperature.
因此上述第二室内换热器112的自清洁过程中，其过程与第一室内换热器111的自清洁过程相类似，也即利用电子膨胀阀130实现节流作用，保持该状态中第一室内换热器111持续发热，减小第二室内换热器112对周围环境的影响。Therefore, in the self-cleaning process of the second indoor heat exchanger 112, the process is similar to the self-cleaning process of the first indoor heat exchanger 111, that is, the throttling action is realized by the electronic expansion valve 130, and the first state is maintained in the state. The indoor heat exchanger 111 continues to generate heat, reducing the influence of the second indoor heat exchanger 112 on the surrounding environment.
在上述自清洁过程中，第一设定温度、第二设定温度、第三设定温度、第四设定温度均可以根据空调器10的实际规格以及运行环境进行测试得出，例如第一设定温度和第三设定温度可以设置为-5℃，第二设定温度和第四设定温度可以设置为-15℃(上述数值在室内室外均为20℃的情况下，对某一具体空调器进行测试得出的结果，在具体实施时可以根据情况在一定范围内进行调整)。第一设定时间和第二设定时间也可相应进行设定，避免在特殊工况下，第一室内换热器111或者第二室内换热器112无法达到第二设定温度和第四设定温度。In the above self-cleaning process, the first set temperature, the second set temperature, the third set temperature, and the fourth set temperature may all be tested according to the actual specifications of the air conditioner 10 and the operating environment, for example, the first The set temperature and the third set temperature can be set to -5 ° C, and the second set temperature and the fourth set temperature can be set to -15 ° C (the above values are 20 ° C indoors and outdoors, for a certain The results obtained by testing the specific air conditioner can be adjusted within a certain range according to the situation during the specific implementation). The first set time and the second set time may also be set correspondingly, so that the first indoor heat exchanger 111 or the second indoor heat exchanger 112 cannot reach the second set temperature and the fourth under special working conditions. set temperature.
另外，自清洁控制器150还可以根据第一室内换热器111或者第二室内换热器112的温度确定自清洁过程的结束条件，例如第一室内换热器111或者第二室内换热器112化霜阶段持续的时间超过设定的化霜时间或者第一室内换热器111或者第二室内换热器112的温度达到设定的化霜温度(例如50℃)时，确定自清洁完成。在完成自清洁后，可以使室内机风机120送风对室内机换热组件110进行干燥。In addition, the self-cleaning controller 150 may further determine an end condition of the self-cleaning process according to the temperature of the first indoor heat exchanger 111 or the second indoor heat exchanger 112, such as the first indoor heat exchanger 111 or the second indoor heat exchanger. When the duration of the defrosting phase exceeds the set defrosting time or the temperature of the first indoor heat exchanger 111 or the second indoor heat exchanger 112 reaches the set defrosting temperature (for example, 50 ° C), it is determined that the self-cleaning is completed. . After the self-cleaning is completed, the indoor unit fan 120 can be supplied with air to dry the indoor unit heat exchange unit 110.
上述自清洁的过程，需要多次切换制冷剂的流路并启停压缩机250，可能会带来额外的能耗，因此自清洁控制器150在接收空调器10开启自清洁功能的触发信号之后，可以首先测量空调器室内机100的工作环境温度；在工作环境温度低于第五设定温度时，将电子膨胀阀130置于受控状态，并执行第一室内换热器111先制冷再制热的过程；在工作环境温度高于第五设定温度时，保持电子膨胀阀130的初始开启状态，并执行室内机换热组件110的整体自清洁过程。例如将第五设定温度设置为26℃时，认为在高于26℃的环境时，对室内机换热组件110进行整体自清洁对环境温度影响不足以使用户感到不舒适，因此可以对室内机换热组件110进行整体自清洁。如果环境温度低于26℃，可以执行上述第一室内换热器111和第二室内换热器112分别自清洁的过程。需要说明的是上述第五设定温度设定为26℃仅为举例说明，在具体实施本实施例时，可以根据需要用户的实际体验对第五设定温度进行设定。The above self-cleaning process requires multiple switching of the flow path of the refrigerant and starting and stopping the compressor 250, which may bring additional energy consumption. Therefore, the self-cleaning controller 150 receives the trigger signal of the self-cleaning function after the air conditioner 10 is turned on. The working environment temperature of the air conditioner indoor unit 100 may be first measured; when the working environment temperature is lower than the fifth set temperature, the electronic expansion valve 130 is placed in a controlled state, and the first indoor heat exchanger 111 is first cooled. The process of heating; maintaining the initial open state of the electronic expansion valve 130 when the working environment temperature is higher than the fifth set temperature, and performing the overall self-cleaning process of the indoor unit heat exchange assembly 110. For example, when the fifth set temperature is set to 26 ° C, it is considered that when the environment is higher than 26 ° C, the overall self-cleaning of the indoor unit heat exchange unit 110 has insufficient influence on the ambient temperature to make the user feel uncomfortable, and therefore can be indoors. The machine heat exchange assembly 110 performs overall self-cleaning. If the ambient temperature is lower than 26 ° C, the self-cleaning process of the first indoor heat exchanger 111 and the second indoor heat exchanger 112 described above may be performed. It should be noted that the fifth set temperature is set to 26 ° C. For example, when the embodiment is specifically implemented, the fifth set temperature can be set according to the actual experience of the user.
本发明实施例还提供了一种空调器10的室内机100自清洁控制方法，该空调器10的室内机100自清洁控制方法用于对上述实施例中的空调器10进行自清洁控制，并且可以由上述实施例中的自清洁控制器150来执行，图3是根据本发明一个实施例的空调器10的室内机100自清洁控制方法的示意图，该空调器10的室内机100自清洁控制方法一般性地可以包括：The embodiment of the present invention further provides a self-cleaning control method for the indoor unit 100 of the air conditioner 10, wherein the indoor unit 100 self-cleaning control method of the air conditioner 10 is used for self-cleaning control of the air conditioner 10 in the above embodiment, and It can be performed by the self-cleaning controller 150 in the above embodiment. FIG. 3 is a schematic diagram of a self-cleaning control method of the indoor unit 100 of the air conditioner 10 according to an embodiment of the present invention, and the indoor unit 100 of the air conditioner 10 is self-cleaning control. The method can generally include:
步骤S302，接收空调器10开启自清洁功能的触发信号，例如接收到用户通过遥控器或者空调器10人机交互接口下发的自清洁控制指令，或者空调器10根据自身工作状态确定需要进行自清洁而产生的触发指令。Step S302, receiving a trigger signal that the air conditioner 10 turns on the self-cleaning function, for example, receiving a self-cleaning control command issued by the user through the remote controller or the human-machine interaction interface of the air conditioner 10, or determining that the air conditioner 10 needs to perform according to its working state. Trigger command generated by cleaning.
步骤S304，将制冷剂流向切换装置260调整至压缩机250向室内机换热组件110提供压缩制冷剂的状态，也即切换至空调器10的制热状态，若已处于制热状态，则保持该状态；In step S304, the refrigerant flow is adjusted to the switching device 260 until the compressor 250 supplies the compressed refrigerant to the indoor unit heat exchange unit 110, that is, switches to the heating state of the air conditioner 10, and if it is already in the heating state, remains The state
步骤S306，通过调节电子膨胀阀130的开度，使得第一室内换热器111先制冷再制热，以在制冷阶段使其表面持续结霜，并在制热阶段进行化霜，利用化霜形成的水带走附着的污染物，实现第一室内换热器111的自清洁。Step S306, by adjusting the opening degree of the electronic expansion valve 130, the first indoor heat exchanger 111 is first cooled and then heated, so that the surface thereof is continuously frosted during the cooling phase, and defrosting is performed during the heating stage, and the defrosting is utilized. The formed water carries away the attached contaminants to achieve self-cleaning of the first indoor heat exchanger 111.
图4是根据本发明一个实施例的空调器10的室内机100自清洁控制方法中实现第一室内换热器111的自清洁的流程图，该图示出了步骤S306的工作流程，具体包括：4 is a flow chart for realizing self-cleaning of the first indoor heat exchanger 111 in the indoor unit 100 self-cleaning control method of the air conditioner 10 according to an embodiment of the present invention, and the figure shows the workflow of step S306, specifically including :
步骤S402，检测第一室内换热器111的温度，例如可以通过获取第一室内换热器111的盘管温度得到。In step S402, detecting the temperature of the first indoor heat exchanger 111 can be obtained, for example, by acquiring the coil temperature of the first indoor heat exchanger 111.
步骤S404，根据第一室内换热器111的温度调节电子膨胀阀130的开度，使得第一室内换热器111的温度下降至第一设定温度；Step S404, adjusting the opening degree of the electronic expansion valve 130 according to the temperature of the first indoor heat exchanger 111, so that the temperature of the first indoor heat exchanger 111 is lowered to the first set temperature;
步骤S406，保持第一室内换热器111的温度下降至第一设定温度时电子膨胀阀130的开度，使第一室内换热器111表面持续结霜，直至满足设定的第一化霜条件，第一化霜条件包括：第一室内换热器111的温度下降至第二设定温度或者电子膨胀阀130的开度保持的时间超过第一设定时间，第二设定温度低于第一设定温度。Step S406, maintaining the opening degree of the electronic expansion valve 130 when the temperature of the first indoor heat exchanger 111 drops to the first set temperature, so that the surface of the first indoor heat exchanger 111 continues to frost until the first set is satisfied. The frost condition, the first defrosting condition includes: the temperature of the first indoor heat exchanger 111 drops to the second set temperature or the opening of the electronic expansion valve 130 is maintained for more than the first set time, and the second set temperature is low At the first set temperature.
步骤S408，在满足第一化霜条件后，使电子膨胀阀130的开度打开至最大，使第一室内换热器111释放热量，以进行化霜。In step S408, after the first defrosting condition is satisfied, the opening degree of the electronic expansion valve 130 is opened to the maximum, and the first indoor heat exchanger 111 is released to perform defrosting.
在第一室内换热器111完成自清洁后，本实施例的空调器10的室内机100自清洁控制方法还可以进一步对第二室内换热器112进行自清洁。具体过程为：将制冷剂流向切换装置260调整至压缩机250向室外机换热组件210提供压缩制冷剂的状态(相当于切换至空调器10的制冷状态)；通过调节电子膨胀阀130的开度，使得第二室内换热器112制冷，从在其表面持续结霜；在满足预设的第二化霜条件后，将制冷剂流向切换装置调整至压缩机250向室内机换热组件110提供压缩制冷剂的状态，并使电子膨胀阀130的开度打开至最大，使第二室内换热器112释放热量，利用化霜形成的水带走附着的污染物，实现第二室内换热器112的自清洁，上述第二化霜条件包括：第二室内换热器112的温度下降至第四设定温度或者电子膨胀阀130的开度保持的时间超过第二设定时间；第四设定温度低于第三设定温度。After the self-cleaning of the first indoor heat exchanger 111, the indoor unit 100 self-cleaning control method of the air conditioner 10 of the present embodiment may further perform self-cleaning of the second indoor heat exchanger 112. The specific process is: adjusting the refrigerant flow to the switching device 260 to a state in which the compressor 250 supplies compressed refrigerant to the outdoor unit heat exchange unit 210 (corresponding to switching to the cooling state of the air conditioner 10); by adjusting the opening of the electronic expansion valve 130 The second indoor heat exchanger 112 is cooled, from continuously frosting on the surface thereof; after the preset second defrosting condition is satisfied, the refrigerant flow is transferred to the switching device to the compressor 250 to the indoor unit heat exchange assembly 110. Providing a state of compressing the refrigerant, and opening the opening of the electronic expansion valve 130 to the maximum, so that the second indoor heat exchanger 112 releases heat, and the water formed by the defrosting removes the attached pollutants to realize the second indoor heat exchange. Self-cleaning of the device 112, the second defrosting condition includes: the temperature of the second indoor heat exchanger 112 drops to a fourth set temperature or the opening of the electronic expansion valve 130 is maintained for more than a second set time; The set temperature is lower than the third set temperature.
图5是根据本发明一个实施例的空调器10的室内机100自清洁控制方法中实现第二室内换热器112的自清洁的流程图，第二室内换热器112的自清洁过程包括：5 is a flow chart for implementing self-cleaning of the second indoor heat exchanger 112 in the indoor unit 100 self-cleaning control method of the air conditioner 10 according to an embodiment of the present invention. The self-cleaning process of the second indoor heat exchanger 112 includes:
步骤S502，检测第二室内换热器112的温度；Step S502, detecting the temperature of the second indoor heat exchanger 112;
步骤S504，根据第二室内换热器112的温度调节电子膨胀阀130的开度，使得第二室内换热器112的温度下降至第三设定温度；Step S504, adjusting the opening degree of the electronic expansion valve 130 according to the temperature of the second indoor heat exchanger 112, so that the temperature of the second indoor heat exchanger 112 is lowered to a third set temperature;
步骤S506，保持第二室内换热器112的温度下降至第三设定温度时电子膨胀阀130的开度，使第二室内换热器112表面持续结霜，直至满足第二化霜条件；Step S506, maintaining the opening degree of the electronic expansion valve 130 when the temperature of the second indoor heat exchanger 112 drops to the third set temperature, so that the surface of the second indoor heat exchanger 112 continues to frost until the second defrosting condition is satisfied;
步骤S508，在满足第二化霜条件后，将制冷剂流向切换装置260调整至压缩机250向室内机换热组件110提供压缩制冷剂的状态；Step S508, after the second defrosting condition is satisfied, the refrigerant flow is adjusted to the switching device 260 to a state in which the compressor 250 supplies the compressed refrigerant to the indoor unit heat exchange assembly 110;
步骤S508，使电子膨胀阀130的开度打开至最大，使第二室内换热器112释放热量，利用化霜形成的水带走附着的污染物，实现第二室内换热器112的自清洁。Step S508, the opening degree of the electronic expansion valve 130 is opened to the maximum, so that the second indoor heat exchanger 112 releases heat, and the water formed by the defrosting removes the attached pollutants, thereby realizing the self-cleaning of the second indoor heat exchanger 112. .
因此上述第二室内换热器112的自清洁过程中，其过程与第一室内换热器111的自清洁过程相类似，也即利用电子膨胀阀130实现节流作用，保持该状态中第一室内换热器111持续发热，减小第二室内换热器112对周围环境的影响。Therefore, in the self-cleaning process of the second indoor heat exchanger 112, the process is similar to the self-cleaning process of the first indoor heat exchanger 111, that is, the throttling action is realized by the electronic expansion valve 130, and the first state is maintained in the state. The indoor heat exchanger 111 continues to generate heat, reducing the influence of the second indoor heat exchanger 112 on the surrounding environment.
为了避免在不必要时，频繁切换制冷剂流向切换装置260以及启停压缩机250，在接收空调器10开启自清洁功能的触发信号之后，可以首先测量空调器室内机100的工作环境温度；在工作环境温度低于第五设定温度时，将电子膨胀阀130置于受控状态，并执行第一室内换热器111先制冷再制热的过程；在工作环境温度高于第五设定温度时，保持电子膨胀阀130的初始开启状态，并执行室内机换热组件110的整体自清洁过程。例如将第五设定温度设置为26℃时，认为在高于26℃的环境时，对室内机换热组件110进行整体自清洁对环境温度影响不足以使用户感到不舒适，因此可以对室内机换热组件110进行整体自清洁。如果环境温度低于26℃，可以执行上述第一室内换热器111和第二室内换热器112分别自清洁的过程。需要说明的是上述第五设定温度设定为26℃仅为举例说明，在具体实施本实施例时，可以根据需要用户的实际体验对第五设定温度进行设定。In order to avoid frequent switching of the refrigerant flow to the switching device 260 and the start-stop compressor 250 when unnecessary, after the receiving air conditioner 10 turns on the trigger signal of the self-cleaning function, the working environment temperature of the air conditioner indoor unit 100 may be first measured; When the working environment temperature is lower than the fifth set temperature, the electronic expansion valve 130 is placed in a controlled state, and the first indoor heat exchanger 111 is first cooled and then heated; the working environment temperature is higher than the fifth setting. At the time of temperature, the initial opening state of the electronic expansion valve 130 is maintained, and the overall self-cleaning process of the indoor unit heat exchange unit 110 is performed. For example, when the fifth set temperature is set to 26 ° C, it is considered that when the environment is higher than 26 ° C, the overall self-cleaning of the indoor unit heat exchange unit 110 has insufficient influence on the ambient temperature to make the user feel uncomfortable, and therefore can be indoors. The machine heat exchange assembly 110 performs overall self-cleaning. If the ambient temperature is lower than 26 ° C, the self-cleaning process of the first indoor heat exchanger 111 and the second indoor heat exchanger 112 described above may be performed. It should be noted that the fifth set temperature is set to 26 ° C. For example, when the embodiment is specifically implemented, the fifth set temperature can be set according to the actual experience of the user.
在上述自清洁过程中，第一设定温度、第二设定温度、第三设定温度、第四设定温度均可以根据空调器10的实际规格以及运行环境进行测试得出，例如第一设定温度和第三设定温度可以设置为-5℃，第二设定温度和第四设定温度可以设置为-15℃(上述数值在室内室外均为20℃的情况下，对某一具体空调器10进行测试得出的结果，在具体实施时可以根据情况在一定范围内进行调整)。第一设定时间和第二设定时间也可相应进行设定，避免在特殊工况下，第一室内换热器111或者第二室内换热器112无法达到第二设定温度和第四设定温度。In the above self-cleaning process, the first set temperature, the second set temperature, the third set temperature, and the fourth set temperature may all be tested according to the actual specifications of the air conditioner 10 and the operating environment, for example, the first The set temperature and the third set temperature can be set to -5 ° C, and the second set temperature and the fourth set temperature can be set to -15 ° C (the above values are 20 ° C indoors and outdoors, for a certain The results obtained by testing the specific air conditioner 10 can be adjusted within a certain range according to the situation in the specific implementation. The first set time and the second set time may also be set correspondingly, so that the first indoor heat exchanger 111 or the second indoor heat exchanger 112 cannot reach the second set temperature and the fourth under special working conditions. set temperature.
另外，自清洁控制器150还可以根据第一室内换热器111或者第二室内换热器112的温度确定自清洁过程的结束条件，例如第一室内换热器111或者第二室内换热器112化霜阶段持续的时间超过设定的化霜时间或者第一室内换热器111或者第二室内换热器112的温度达到设定的化霜温度(例如50℃)时，确定自清洁完成。在完成自清洁后，可以使室内机风机120送风对室内换热器组件进行干燥。In addition, the self-cleaning controller 150 may further determine an end condition of the self-cleaning process according to the temperature of the first indoor heat exchanger 111 or the second indoor heat exchanger 112, such as the first indoor heat exchanger 111 or the second indoor heat exchanger. When the duration of the defrosting phase exceeds the set defrosting time or the temperature of the first indoor heat exchanger 111 or the second indoor heat exchanger 112 reaches the set defrosting temperature (for example, 50 ° C), it is determined that the self-cleaning is completed. . After the self-cleaning is completed, the indoor unit fan 120 can be supplied with air to dry the indoor heat exchanger assembly.
以将第一设定温度和第三设定温度设置为-5℃，第二设定温度和第四设定温度设置为-15℃，化霜温度设置为50℃，第一设定时间和第二设定时间设置为10分钟，第五设定温度设置为26℃为例。对完成整个室内机换热组件110的过程进行介绍，图6是根据本发明一个具体实施例的空调器10的室内机自清洁控制方法的具体实施流程图，该流程包括：The first set temperature and the third set temperature are set to -5 ° C, the second set temperature and the fourth set temperature are set to -15 ° C, the defrosting temperature is set to 50 ° C, the first set time and The second set time is set to 10 minutes, and the fifth set temperature is set to 26 ° C as an example. FIG. 6 is a flowchart of a specific implementation of an indoor unit self-cleaning control method of an air conditioner 10 according to an embodiment of the present invention. The process includes:
步骤S602，在空调器10制热过程中，接收空调器10开启自清洁功能的触发信号；Step S602, receiving a trigger signal for the air conditioner 10 to turn on the self-cleaning function during the heating process of the air conditioner 10;
步骤S604，获取室内机100工作环境的环境温度，并判断该环境温度是否高于26℃，若高于26℃，则执行步骤S640，执行室内机换热组件110的整体自清洁过程；Step S604, the ambient temperature of the working environment of the indoor unit 100 is obtained, and it is determined whether the ambient temperature is higher than 26 ° C. If it is higher than 26 ° C, step S640 is performed to perform an overall self-cleaning process of the indoor unit heat exchange component 110;
步骤S606，在环境温度低于26℃时，将制冷剂流向切换装置调整至压缩机250向室内机换热组件110提供压缩制冷剂的状态，也即保持空调器10的制热状态；Step S606, when the ambient temperature is lower than 26 ° C, the refrigerant flow is adjusted to the switching device until the compressor 250 supplies the compressed refrigerant to the indoor unit heat exchange assembly 110, that is, the heating state of the air conditioner 10 is maintained;
步骤S608，室内机风机120和室外机风机220停机，压缩机250按预设的目标频率运转(预设目标频率根据室内外温度选择，例如在室内室外均为20℃的条件下，可以设置为40Hz)；In step S608, the indoor unit fan 120 and the outdoor unit fan 220 are stopped, and the compressor 250 is operated at a preset target frequency (the preset target frequency is selected according to the indoor and outdoor temperature, for example, under the condition of 20 ° C indoors and outdoors, it can be set to 40Hz);
步骤S610，检测第一室内换热器111的盘管温度TP1，减小电子膨胀阀130的开度，使TP1逐渐下降至-5℃；Step S610, detecting the coil temperature TP1 of the first indoor heat exchanger 111, reducing the opening degree of the electronic expansion valve 130, and gradually reducing the TP1 to -5 ° C;
步骤S612，保持TP1下降至-5℃时电子膨胀阀130的开度，使第一室内换热器111表面持续结霜；Step S612, keeping the opening degree of the electronic expansion valve 130 when TP1 is lowered to -5 ° C, so that the surface of the first indoor heat exchanger 111 continues to frost;
步骤S614，判断TP1是否下降至-15℃；Step S614, determining whether TP1 drops to -15 ° C;
步骤S616，判断电子膨胀阀130的开度持续保持时间超过10分钟；Step S616, determining that the opening degree of the electronic expansion valve 130 is maintained for more than 10 minutes;
步骤S618，在TP1下降至-15℃以及开度持续保持时间超过10分钟中任一条件满足时，电子膨胀阀130以最快速度打开，使第一室内换热器111释放热量，以进行化霜；In step S618, when any of the conditions that the TP1 falls to -15 ° C and the opening continuous holding time exceeds 10 minutes, the electronic expansion valve 130 is opened at the fastest speed, and the first indoor heat exchanger 111 releases heat for the purpose. Frost;
步骤S620，判断TP1是否达到化霜温度50℃；Step S620, determining whether TP1 reaches a defrosting temperature of 50 ° C;
步骤S622，第一室内换热器111自清洁结束；Step S622, the first indoor heat exchanger 111 is self-cleaning;
步骤S624，制冷剂流向切换装置(四通阀)260换向，检测第二室内换热器112的盘管温度TP2；Step S624, the refrigerant flow is reversed to the switching device (four-way valve) 260, detecting the coil temperature TP2 of the second indoor heat exchanger 112;
步骤S626，减小电子膨胀阀130的开度，使TP2逐渐下降至-5℃；Step S626, reducing the opening degree of the electronic expansion valve 130, so that TP2 gradually drops to -5 ° C;
步骤S628，保持TP2下降至-5℃时电子膨胀阀130的开度，使第二室内换热器112表面持续结霜；Step S628, keeping the opening degree of the electronic expansion valve 130 when the TP2 is lowered to -5 ° C, so that the surface of the second indoor heat exchanger 112 continues to frost;
步骤S630，判断TP2是否下降至-15℃；Step S630, determining whether TP2 drops to -15 ° C;
步骤S632，判断电子膨胀阀130的开度持续保持时间超过10分钟；Step S632, determining that the opening degree of the electronic expansion valve 130 is continuously maintained for more than 10 minutes;
步骤S634，在TP2下降至-15℃以及开度持续保持时间超过10分钟中任一条件满足时，再次使制冷剂流向切换装置(四通阀)260换向，电子膨胀阀130打开，使第二室内换热器112释放热量，以进行化霜；In step S634, when any of the conditions that the TP2 falls to -15 ° C and the opening continuous holding time exceeds 10 minutes, the refrigerant flow is again reversed to the switching device (four-way valve) 260, and the electronic expansion valve 130 is opened. The two indoor heat exchangers 112 release heat for defrosting;
步骤S636，判断TP2是否达到化霜温度50℃；Step S636, determining whether TP2 reaches a defrosting temperature of 50 ° C;
步骤S638，第二室内换热器112自清洁结束。In step S638, the second indoor heat exchanger 112 is self-cleaning.
在具体实施上述方法的过程中，上述具体的判断阈值数值均可以根据空调器10的规格、运行环境、用户习惯进行调整，上述具体数值仅为例举。In the process of implementing the foregoing method, the specific determination threshold value may be adjusted according to the specifications, the operating environment, and the user habit of the air conditioner 10. The specific numerical values are merely examples.
本实施例的空调器10的室内机100自清洁控制方法，尤其适用于空调器10运行于制热状态下，分别进行第一室内换热器111以及第二室内换热器112分别执行自清洁过程，相比于现有技术中的室内机换热组件110整体进行自清洁过程，减小了对工作环境温度的影响，防止出现温度的剧烈波动，给用户带来了更佳的使用体验。The indoor unit 100 self-cleaning control method of the air conditioner 10 of the embodiment is particularly suitable for the air conditioner 10 to operate in a heating state, and the first indoor heat exchanger 111 and the second indoor heat exchanger 112 respectively perform self-cleaning. The process compares the self-cleaning process of the indoor unit heat exchange component 110 in the prior art, reduces the influence on the working environment temperature, prevents the violent fluctuation of the temperature, and brings a better user experience.
至此，本领域技术人员应认识到，虽然本文已详尽示出和描述了本发明的多个示例性实施例，但是，在不脱离本发明精神和范围的情况下，仍可根据本发明公开的内容直接确定或推导出符合本发明原理的许多其他变型或修改。因此，本发明的范围应被理解和认定为覆盖了所有这些其他变型或修改。In this regard, it will be appreciated by those skilled in the <RTIgt;the</RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; The content directly determines or derives many other variations or modifications consistent with the principles of the invention. Therefore, the scope of the invention should be understood and construed as covering all such other modifications or modifications.

Claims (11)

  1. 一种空调器的室内机自清洁控制方法，其中所述空调器的制冷系统包括由制冷剂管路依次串接的室内机换热组件、制冷剂流向切换装置、压缩机、室外机换热组件、以及节流装置，其中所述室内机换热组件包括：串接的第一室内换热器以及第二室内换热器，其中所述第二室内换热器通过所述制冷剂流向切换装置连接至所述压缩机，所述第一室内换热器和所述第二室内换热器之间设置有电子膨胀阀，并且所述控制方法包括：An indoor unit self-cleaning control method for an air conditioner, wherein the refrigeration system of the air conditioner comprises an indoor unit heat exchange component sequentially connected by a refrigerant pipeline, a refrigerant flow direction switching device, a compressor, and an outdoor unit heat exchange component And a throttle device, wherein the indoor unit heat exchange assembly comprises: a first indoor heat exchanger connected in series and a second indoor heat exchanger, wherein the second indoor heat exchanger passes through the refrigerant flow to the switching device Connected to the compressor, an electronic expansion valve is disposed between the first indoor heat exchanger and the second indoor heat exchanger, and the control method includes:
    接收所述空调器开启自清洁功能的触发信号；Receiving a trigger signal that the air conditioner turns on the self-cleaning function;
    将所述制冷剂流向切换装置调整至所述压缩机向所述室内机换热组件提供压缩制冷剂的状态；Adjusting the flow of the refrigerant to the switching device to a state in which the compressor supplies compressed refrigerant to the indoor unit heat exchange component;
    通过调节所述电子膨胀阀的开度，使得所述第一室内换热器先制冷再制热，以在所述制冷阶段使其表面持续结霜，并在所述制热阶段进行化霜，利用化霜形成的水带走附着的污染物，实现所述第一室内换热器的自清洁。Adjusting the opening degree of the electronic expansion valve, the first indoor heat exchanger is first cooled and then heated to continuously frost the surface during the cooling phase, and defrosting in the heating stage, Self-cleaning of the first indoor heat exchanger is achieved by using the water formed by the defrosting to carry away the attached contaminants.
  2. 根据权利要求1所述的控制方法，其中，通过调节所述电子膨胀阀的开度，使得所述第一室内换热器先制冷再制热的步骤包括：The control method according to claim 1, wherein the step of first cooling and reheating the first indoor heat exchanger by adjusting an opening degree of the electronic expansion valve comprises:
    检测所述第一室内换热器的温度；Detecting a temperature of the first indoor heat exchanger;
    根据所述第一室内换热器的温度调节所述电子膨胀阀的开度，使得所述第一室内换热器的温度下降至所述第一设定温度；Adjusting an opening degree of the electronic expansion valve according to a temperature of the first indoor heat exchanger, so that a temperature of the first indoor heat exchanger is lowered to the first set temperature;
    保持所述第一室内换热器的温度下降至第一设定温度时所述电子膨胀阀的开度，使所述第一室内换热器表面持续结霜，直至满足设定的第一化霜条件；Maintaining an opening degree of the electronic expansion valve when the temperature of the first indoor heat exchanger drops to a first set temperature, so that the surface of the first indoor heat exchanger continues to frost until the first set is satisfied Frost condition
    在满足所述第一化霜条件后，使所述电子膨胀阀的开度打开至最大，使所述第一室内换热器释放热量，以进行化霜。After the first defrosting condition is satisfied, the opening degree of the electronic expansion valve is opened to the maximum, and the first indoor heat exchanger releases heat to perform defrosting.
  3. 根据权利要求2所述的控制方法，其中The control method according to claim 2, wherein
    所述第一化霜条件包括：所述第一室内换热器的温度下降至第二设定温度或者所述电子膨胀阀的开度保持的时间超过第一设定时间，所述第二设定温度低于所述第一设定温度。The first defrosting condition includes: the temperature of the first indoor heat exchanger drops to a second set temperature or the opening of the electronic expansion valve is maintained for more than a first set time, the second setting The predetermined temperature is lower than the first set temperature.
  4. 根据权利要求1所述的控制方法，在所述第一室内换热器完成自清洁后，还包括：The control method according to claim 1, after the self-cleaning of the first indoor heat exchanger, further comprising:
    将所述制冷剂流向切换装置调整至所述压缩机向所述室外机换热组件提供压缩制冷剂的状态；Adjusting the refrigerant flow to the switching device to a state in which the compressor supplies compressed refrigerant to the outdoor unit heat exchange component;
    通过调节所述电子膨胀阀的开度，使得所述第二室内换热器制冷，从在其表面持续结霜；Adjusting the opening degree of the electronic expansion valve to cause the second indoor heat exchanger to cool, from continuously frosting on the surface thereof;
    在满足预设的第二化霜条件后，将所述制冷剂流向切换装置调整至所述压缩机向所述室内机换热组件提供压缩制冷剂的状态，并使所述电子膨胀阀的开度打开至最大，使所述第二室内换热器释放热量，利用化霜形成的水带走附着的污染物，实现所述第二室内换热器的自清洁。After satisfying the preset second defrosting condition, adjusting the refrigerant flow to the switching device to a state in which the compressor supplies compressed refrigerant to the indoor unit heat exchange component, and opening the electronic expansion valve The degree is opened to the maximum, so that the second indoor heat exchanger releases heat, and the water formed by the defrosting removes the attached pollutants to realize self-cleaning of the second indoor heat exchanger.
  5. 根据权利要求4所述的控制方法，其中通过调节所述电子膨胀阀的开度，使得所述第二室内换热器制冷的步骤包括：The control method according to claim 4, wherein the step of cooling the second indoor heat exchanger by adjusting the opening degree of the electronic expansion valve comprises:
    检测所述第二室内换热器的温度；Detecting a temperature of the second indoor heat exchanger;
    根据所述第二室内换热器的温度调节所述电子膨胀阀的开度，使得所述第二室内换 热器的温度下降至第三设定温度；Adjusting an opening degree of the electronic expansion valve according to a temperature of the second indoor heat exchanger, so that a temperature of the second indoor heat exchanger is lowered to a third set temperature;
    保持所述第二室内换热器的温度下降至第三设定温度时所述电子膨胀阀的开度，使所述第二室内换热器表面持续结霜，直至满足所述第二化霜条件。Maintaining an opening degree of the electronic expansion valve when the temperature of the second indoor heat exchanger drops to a third set temperature, so that the surface of the second indoor heat exchanger continues to frost until the second defrosting is satisfied condition.
  6. 根据权利要求4或5所述的控制方法，其中The control method according to claim 4 or 5, wherein
    所述第二化霜条件包括：所述第二室内换热器的温度下降至第四设定温度或者所述电子膨胀阀的开度保持的时间超过第二设定时间；所述第四设定温度低于所述第三设定温度。The second defrosting condition includes: the temperature of the second indoor heat exchanger drops to a fourth set temperature or the opening of the electronic expansion valve is maintained for more than a second set time; The predetermined temperature is lower than the third set temperature.
  7. 根据权利要求4所述的控制方法，其中，在接收所述空调器开启自清洁功能的触发信号之后还包括：The control method according to claim 4, further comprising: after receiving the trigger signal that the air conditioner turns on the self-cleaning function:
    测量所述空调器室内机的工作环境温度；Measuring a working environment temperature of the indoor unit of the air conditioner;
    在所述工作环境温度低于第五设定温度时，将所述电子膨胀阀置于受控状态，并执行所述第一室内换热器先制冷再制热的过程；When the working environment temperature is lower than the fifth set temperature, placing the electronic expansion valve in a controlled state, and performing a process of first cooling and then heating the first indoor heat exchanger;
    在所述工作环境温度高于第五设定温度时，保持所述电子膨胀阀的初始开启状态，并执行所述室内机换热组件的整体自清洁过程。When the working environment temperature is higher than the fifth set temperature, the initial open state of the electronic expansion valve is maintained, and the overall self-cleaning process of the indoor unit heat exchange assembly is performed.
  8. 一种空调器，包括制冷系统和自清洁控制器，其中An air conditioner including a refrigeration system and a self-cleaning controller, wherein
    所述制冷系统包括：由制冷剂管路依次串接的室内机换热组件、制冷剂流向切换装置、压缩机、室外机换热组件、以及节流装置，其中所述室内机换热组件包括：串接的第一室内换热器以及第二室内换热器，其中所述第二室内换热器通过所述制冷剂流向切换装置连接至所述压缩机，所述第一室内换热器和所述第二室内换热器之间设置有电子膨胀阀；The refrigeration system includes: an indoor unit heat exchange component sequentially connected in series by a refrigerant pipeline, a refrigerant flow direction switching device, a compressor, an outdoor unit heat exchange component, and a throttle device, wherein the indoor unit heat exchange component includes a first indoor heat exchanger connected in series and a second indoor heat exchanger, wherein the second indoor heat exchanger is connected to the compressor through the refrigerant flow switching device, the first indoor heat exchanger And an electronic expansion valve is disposed between the second indoor heat exchanger;
    所述自清洁控制器，与所述制冷系统电连接，并配置成：接收所述空调器开启自清洁功能的触发信号；将所述制冷剂流向切换装置调整至所述压缩机向所述室内机换热组件提供压缩制冷剂的状态；通过调节所述电子膨胀阀的开度，使得所述第一室内换热器先制冷再制热，以在所述制冷阶段使其表面持续结霜，并在所述制热阶段进行化霜，利用化霜形成的水带走附着的污染物，实现所述第一室内换热器的自清洁。The self-cleaning controller is electrically connected to the refrigeration system, and configured to: receive a trigger signal that the air conditioner turns on a self-cleaning function; and adjust the refrigerant flow to the switching device to the compressor to the indoor The heat exchange component of the machine provides a state of compressing the refrigerant; by adjusting the opening degree of the electronic expansion valve, the first indoor heat exchanger is first cooled and then heated to continuously frost the surface during the cooling phase. And performing defrosting in the heating stage, and the self-cleaning of the first indoor heat exchanger is realized by using the water formed by the defrosting to carry away the attached pollutants.
  9. 根据权利要求8所述的空调器，其中所述自清洁控制器还配置成：The air conditioner according to claim 8, wherein said self-cleaning controller is further configured to:
    检测所述第一室内换热器的温度；Detecting a temperature of the first indoor heat exchanger;
    根据所述第一室内换热器的温度调节所述电子膨胀阀的开度，使得所述第一室内换热器的温度下降至第一设定温度；Adjusting an opening degree of the electronic expansion valve according to a temperature of the first indoor heat exchanger, so that a temperature of the first indoor heat exchanger is lowered to a first set temperature;
    保持所述第一室内换热器的温度下降至所述第一设定温度时所述电子膨胀阀的开度，使所述第一室内换热器表面持续结霜，直至满足设定的第一化霜条件；Maintaining an opening degree of the electronic expansion valve when the temperature of the first indoor heat exchanger drops to the first set temperature, so that the surface of the first indoor heat exchanger continues to frost until the set number is satisfied a defrosting condition;
    在满足所述第一化霜条件后，使所述电子膨胀阀的开度打开至最大，使所述第一室内换热器释放热量，以进行化霜，所述第一化霜条件包括：所述第一室内换热器的温度下降至第二设定温度或者所述电子膨胀阀的开度保持的时间超过第一设定时间，所述第二设定温度低于所述第一设定温度。After the first defrosting condition is satisfied, the opening degree of the electronic expansion valve is opened to a maximum, and the first indoor heat exchanger is released to perform defrosting, and the first defrosting condition includes: The temperature of the first indoor heat exchanger drops to a second set temperature or the opening of the electronic expansion valve is maintained for more than a first set time, and the second set temperature is lower than the first set Set the temperature.
  10. 根据权利要求8所述的空调器，其中所述自清洁控制器还配置成：The air conditioner according to claim 8, wherein said self-cleaning controller is further configured to:
    在所述第一室内换热器完成自清洁后，将所述制冷剂流向切换装置调整至所述压缩机向所述室外机换热组件提供压缩制冷剂的状态；After the first indoor heat exchanger completes self-cleaning, adjusting the refrigerant flow to the switching device to a state in which the compressor supplies compressed refrigerant to the outdoor unit heat exchange component;
    检测所述第二室内换热器的温度；根据所述第二室内换热器的温度调节所述电子膨 胀阀的开度，使得所述第二室内换热器的温度下降至第三设定温度；保持所述第二室内换热器的温度下降至第三设定温度时所述电子膨胀阀的开度，使所述第二室内换热器表面持续结霜，直至满足预设的第二化霜条件；Detecting a temperature of the second indoor heat exchanger; adjusting an opening degree of the electronic expansion valve according to a temperature of the second indoor heat exchanger, so that a temperature of the second indoor heat exchanger is lowered to a third setting a temperature; maintaining an opening of the electronic expansion valve when the temperature of the second indoor heat exchanger drops to a third set temperature, so that the surface of the second indoor heat exchanger continues to frost until the preset number is satisfied Second defrosting condition;
    在满足所述第二化霜条件后，将所述制冷剂流向切换装置调整至所述压缩机向所述室内机换热组件提供压缩制冷剂的状态，并使所述电子膨胀阀的开度打开至最大，使所述第二室内换热器释放热量，利用化霜形成的水带走附着的污染物，实现所述第二室内换热器的自清洁，所述第二化霜条件包括：所述第二室内换热器的温度下降至第四设定温度或者所述电子膨胀阀的开度保持的时间超过第二设定时间；所述第四设定温度低于所述第三设定温度。After satisfying the second defrosting condition, adjusting the refrigerant flow to the switching device to a state in which the compressor supplies compressed refrigerant to the indoor unit heat exchange component, and opening the electronic expansion valve Opening to the maximum, the second indoor heat exchanger releases heat, and the water formed by the defrosting removes the attached pollutants to achieve self-cleaning of the second indoor heat exchanger, and the second defrosting condition includes : the temperature of the second indoor heat exchanger drops to a fourth set temperature or the opening of the electronic expansion valve is maintained for more than a second set time; the fourth set temperature is lower than the third set temperature.
  11. 根据权利要求8所述的空调器，其中所述自清洁控制器还配置成：The air conditioner according to claim 8, wherein said self-cleaning controller is further configured to:
    在接收所述空调器开启自清洁功能的触发信号之后，测量所述空调器室内机的工作环境温度；After receiving the trigger signal that the air conditioner turns on the self-cleaning function, measuring the working environment temperature of the indoor unit of the air conditioner;
    在所述工作环境温度低于第五设定温度时，将所述电子膨胀阀置于受控状态，并执行所述第一室内换热器先制冷再制热的过程；When the working environment temperature is lower than the fifth set temperature, placing the electronic expansion valve in a controlled state, and performing a process of first cooling and then heating the first indoor heat exchanger;
    在所述工作环境温度高于第五设定温度时，保持所述电子膨胀阀的初始开启状态，并执行所述室内机换热组件的整体自清洁过程。When the working environment temperature is higher than the fifth set temperature, the initial open state of the electronic expansion valve is maintained, and the overall self-cleaning process of the indoor unit heat exchange assembly is performed.
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