CN107525220A - Air conditioner and its outdoor unit automatically cleaning control method - Google Patents

Air conditioner and its outdoor unit automatically cleaning control method Download PDF

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Publication number
CN107525220A
CN107525220A CN201710641148.7A CN201710641148A CN107525220A CN 107525220 A CN107525220 A CN 107525220A CN 201710641148 A CN201710641148 A CN 201710641148A CN 107525220 A CN107525220 A CN 107525220A
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China
Prior art keywords
heat exchanger
temperature
outdoor heat
expansion valve
aperture
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CN201710641148.7A
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Chinese (zh)
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CN107525220B (en
Inventor
刘超超
杨中锋
袁俊军
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Qingdao Haier Air Conditioner Gen Corp Ltd
Haier Smart Home Co Ltd
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Qingdao Haier Air Conditioner Gen Corp Ltd
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Priority to CN201710641148.7A priority Critical patent/CN107525220B/en
Publication of CN107525220A publication Critical patent/CN107525220A/en
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Publication of CN107525220B publication Critical patent/CN107525220B/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements

Abstract

The invention provides a kind of air conditioner and its outdoor unit automatically cleaning control method, wherein outdoor unit heat-exchanging component to include:The first outdoor heat exchanger and the second outdoor heat exchanger of concatenation, wherein the first outdoor heat exchanger is connected to compressor by refrigerant flow direction switching device, are provided with electric expansion valve, and control method includes between the first outdoor heat exchanger and the second outdoor heat exchanger:Refrigerant flow direction switching device is adjusted to the state that compression refrigerant is provided to indoor set heat-exchanging component;Adjust the aperture of electric expansion valve so that the continuous surface frosting of the first outdoor heat exchanger;After default first defrost condition is met, switch refrigerant flow direction switching device, refrigerant flow direction is commutated, the water formed using defrost takes away the pollutant of attachment, realizes the automatically cleaning of the first outdoor heat exchanger;After meeting default second defrost condition, the aperture of electric expansion valve is opened to maximum, the second outdoor heat exchanger is discharged heat, realize the automatically cleaning of the second outdoor heat exchanger.

Description

Air conditioner and its outdoor unit automatically cleaning control method
Technical field
The present invention relates to domestic air conditioning, more particularly to air conditioner and its outdoor unit automatically cleaning control method.
Background technology
After air conditioner placement for a long time or use, outdoor unit can save bit by bit substantial amounts of dust and dirt.These dust and dirt are attached to outdoor unit Heat exchanger on, on the one hand can reduce the heat exchange property of heat exchanger, cause household air-conditioner to decline, cause energy consumption to improve.
The scheme that traditional air conditioner is taken typically seldom safeguards to outdoor unit, generally relies on its condensed water or environment Wind and rain is cleaned, and this mode is it is difficult to ensure that the cleaning performance of outdoor unit, longtime running cause the heat exchange efficiency of outdoor unit big It is big to reduce.
The content of the invention
One object of the present invention offer is a kind of at least to solve the sky with self-cleaning function of above-mentioned partial technical problems Adjust device and its control method.
The present invention one is further objective is that heat exchange efficiency will be improved by cleaning outdoor unit heat-exchanging component.
Another further object of the present invention, which will avoid cleaning in the hot component process of outdoor unitization, causes indoor set Operating temperature big ups and downs, influence user experience.
According to an aspect of the invention, there is provided a kind of outdoor unit automatically cleaning control method of air conditioner, wherein air-conditioning The refrigeration system of device include be sequentially connected in series by refrigerant line indoor set heat-exchanging component, refrigerant flow direction switching device, compression Machine, outdoor unit heat-exchanging component and throttling arrangement, wherein outdoor unit heat-exchanging component include:Concatenation the first outdoor heat exchanger with And second outdoor heat exchanger, wherein the first outdoor heat exchanger is connected to compressor, the first Room by refrigerant flow direction switching device Electric expansion valve is provided between external heat exchanger and the second outdoor heat exchanger, and control method includes:Air conditioner is received to open The trigger signal of self-cleaning function;Refrigerant flow direction switching device is adjusted to compressor to indoor set heat-exchanging component compression is provided The state of refrigerant;Adjust the aperture of electric expansion valve so that the continuous surface frosting of the first outdoor heat exchanger;Meeting to preset The first defrost condition after, switch refrigerant flow direction switching device, refrigerant flow direction is commutated so that the first outdoor heat exchanger is released Thermal discharge, to carry out defrost, the water formed using defrost takes away the pollutant of attachment, realizes the certainly clear of the first outdoor heat exchanger It is clean;By the aperture for adjusting electric expansion valve so that frosting is continued on the surface of the second outdoor heat exchanger, until meeting default the After two defrost conditions, the aperture of electric expansion valve is opened to maximum, the second outdoor heat exchanger is discharged heat, utilize defrost shape Into water take away the pollutant of attachment, realize the automatically cleaning of the second outdoor heat exchanger.
Alternatively, the aperture of electric expansion valve is adjusted so that wrap the step of the continuous surface frosting of the first outdoor heat exchanger Include:Detect the temperature of the first outdoor heat exchanger;Reduce the aperture of electric expansion valve according to the temperature of the first outdoor heat exchanger so that The first design temperature is down at a temperature of first outdoor heat exchanger;Keep being down to the first setting at a temperature of the first outdoor heat exchanger The aperture of electric expansion valve during temperature, make the first outdoor heat exchanger continuous surface frosting, until meeting the first defrost condition.
Alternatively, the first defrost condition includes:The second design temperature or electricity are down at a temperature of first outdoor heat exchanger The time that the aperture of sub- expansion valve is kept is less than the first design temperature more than the first setting time, the second design temperature.
Alternatively, also include during the first outdoor heat exchanger release heat is caused:Detect the first outdoor heat exchanger Temperature;After the temperature of the first outdoor heat exchanger reaches default first defrost cut-off temperature, the first outdoor heat exchanger is determined Automatically cleaning complete.
Alternatively, by adjusting the aperture of electric expansion valve so that continue the step of frosting in the surface of the second outdoor heat exchanger Suddenly include:Detect the temperature of the second outdoor heat exchanger;According to the aperture of the temperature adjustment electric expansion valve of the second outdoor heat exchanger, So that the 3rd design temperature is down at a temperature of the second outdoor heat exchanger;Keep being down to the 3rd at a temperature of the second outdoor heat exchanger The aperture of electric expansion valve during design temperature, make the second outdoor heat exchanger continuous surface frosting, until meeting the second defrost condition.
Alternatively, the second defrost condition includes:The 4th design temperature or electricity are down at a temperature of second outdoor heat exchanger The time that the aperture of sub- expansion valve is kept is less than the 3rd design temperature more than the second setting time, the 4th design temperature.
Alternatively, also include during the second outdoor heat exchanger release heat is caused:Detect the second outdoor heat exchanger Temperature;After the temperature of the second outdoor heat exchanger reaches default second defrost cut-off temperature, the second outdoor heat exchanger is determined Automatically cleaning complete.
According to another aspect of the present invention, a kind of air conditioner is additionally provided, it includes refrigeration system and automatically cleaning control Device, wherein refrigeration system include:The indoor set heat-exchanging component that is sequentially connected in series by refrigerant line, refrigerant flow direction switching device, Compressor, outdoor unit heat-exchanging component and throttling arrangement, wherein outdoor unit heat-exchanging component include:First outdoor heat exchange of concatenation Device and the second outdoor heat exchanger, wherein the second outdoor heat exchanger is connected to compressor by refrigerant flow direction switching device, the Electric expansion valve is provided between one outdoor heat exchanger and the second outdoor heat exchanger;Automatically cleaning controller, is electrically connected with refrigeration system Connect, and be configured to:Receive the trigger signal that air conditioner opens self-cleaning function;Refrigerant flow direction switching device is adjusted to compression Machine provides the state of compression refrigerant to indoor set heat-exchanging component;Adjust the aperture of electric expansion valve so that the first outdoor heat exchange The continuous surface frosting of device;After default first defrost condition is met, switch refrigerant flow direction switching device, make cold-producing medium stream To commutation so that the first outdoor heat exchanger discharges heat, and to carry out defrost, the water formed using defrost takes away the pollution of attachment Thing, realize the automatically cleaning of the first outdoor heat exchanger;By the aperture for adjusting electric expansion valve so that the table of the second outdoor heat exchanger Frosting is continued in face, until after meeting default second defrost condition, the aperture of electric expansion valve is opened to maximum, makes second Room External heat exchanger discharges heat, and the water formed using defrost takes away the pollutant of attachment, realizes the automatically cleaning of the second outdoor heat exchanger To carry out defrost.
Alternatively, automatically cleaning controller is configured to:Detect the temperature of the first outdoor heat exchanger;According to the first outdoor heat exchange The temperature of device reduces the aperture of electric expansion valve so that the first design temperature is down at a temperature of the first outdoor heat exchanger;Keep The aperture of electric expansion valve when the first design temperature is down at a temperature of the first outdoor heat exchanger, make the first outdoor heat exchanger surface Continue frosting, until meeting the first defrost condition, the first defrost condition includes:Second is down at a temperature of first outdoor heat exchanger The time that the aperture of design temperature or electric expansion valve is kept sets more than the first setting time, the second design temperature less than first Constant temperature degree;After the temperature of the first outdoor heat exchanger reaches default first defrost cut-off temperature, the first outdoor heat exchanger is determined Automatically cleaning complete.
Alternatively, automatically cleaning controller is configured to:Detect the temperature of the second outdoor heat exchanger;According to the second outdoor heat exchange The aperture of the temperature adjustment electric expansion valve of device so that the 3rd design temperature is down at a temperature of the second outdoor heat exchanger;Keep The aperture of electric expansion valve when being down to three design temperatures at a temperature of the second outdoor heat exchanger, make the second outdoor heat exchanger surface Continue frosting, until meeting the second defrost condition, the second defrost condition includes:The 4th is down at a temperature of second outdoor heat exchanger The time that the aperture of design temperature or electric expansion valve is kept sets more than the second setting time, the 4th design temperature less than the 3rd Constant temperature degree;After the temperature of the second outdoor heat exchanger reaches default second defrost cut-off temperature, the second outdoor heat exchanger is determined Automatically cleaning complete.
The air conditioner and its outdoor unit automatically cleaning control method, the air conditioner that is particularly suitable for use in of the present invention runs on heating state Under, the structure of outdoor unit heat-exchanging component is improved, there is provided changed outside the first outdoor heat exchanger and second Room of concatenation Hot device, and electric expansion valve is added between the first outdoor heat exchanger and the second outdoor heat exchanger, by adjusting refrigerant Flow direction and electric expansion valve aperture, carry out the first outdoor heat exchanger respectively and the second outdoor heat exchanger perform respectively from Cleaning process, outdoor heat exchanger can both be cleaned, and improve its heat exchange efficiency, can also reduced to indoor set in addition The influence normally heated, the big ups and downs of temperature are prevented, more preferably usage experience is brought to user.
Further, air conditioner of the invention and its outdoor unit automatically cleaning control method, to the first outdoor heat exchanger and The respective automatically cleaning flow of second outdoor heat exchanger is optimized, and the time of consuming is less, and automatically cleaning effect is more preferable.
According to the accompanying drawings will be brighter to the detailed description of the specific embodiment of the invention, those skilled in the art Above-mentioned and other purposes, the advantages and features of the present invention.
Brief description of the drawings
Some specific embodiments of the present invention are described in detail by way of example, and not by way of limitation with reference to the accompanying drawings hereinafter. Identical reference denotes same or similar part or part in accompanying drawing.It should be appreciated by those skilled in the art that these What accompanying drawing was not necessarily drawn to scale.In accompanying drawing:
Fig. 1 is the functional block diagram of air conditioner according to an embodiment of the invention;
Fig. 2 is the schematic diagram of the refrigeration system of air conditioner according to an embodiment of the invention;
Fig. 3 is the schematic diagram of the outdoor unit automatically cleaning control method of air conditioner according to an embodiment of the invention;
Fig. 4 is to realize that first is outdoor in the outdoor unit automatically cleaning control method of air conditioner according to an embodiment of the invention The self-cleaning flow chart of heat exchanger;
Fig. 5 is to be realized in the outdoor unit automatically cleaning control method of air conditioner according to an embodiment of the invention outside second Room The self-cleaning flow chart of heat exchanger;And
Fig. 6 is the specific implementation according to the outdoor unit automatically cleaning control method of the air conditioner of a specific embodiment of the invention Flow chart.
Embodiment
Fig. 1 is the functional block diagram of air conditioner 10 according to an embodiment of the invention.Fig. 2 is according to the present invention one The schematic diagram of the refrigeration system of the air conditioner 10 of individual embodiment.
The air conditioner 10 can include air conditioner room unit 100 and air-conditioner outdoor unit 200, air conditioner chamber in general manner Interior machine 100 and air-conditioner outdoor unit 200 complete refrigeration and the heating circulation of air-conditioning, so as to realize by effectively coordinating operating Occupy the cold and hot regulation of indoor temperature.The refrigeration system of air conditioner 10 can realize that compression refrigeration is followed using kind of refrigeration cycle is compressed Ring realizes the biography of heat using refrigerant in the compression phase transformation circulation of compressor 250, condenser, evaporator, throttling arrangement 240 Pass.Refrigeration system can also set refrigerant flow direction switching device 260, change the flow direction of refrigerant, make indoor set heat-exchanging component 110 realize alternately as evaporator or condenser, correspondingly outdoor unit heat-exchanging component 210 alternately as condenser or evaporator Refrigeration or heat-production functions, refrigerant flow direction switching device 260 are typically realized using four-way valve.
Compression kind of refrigeration cycle operation principle be:Compressor 250 is the power of kind of refrigeration cycle, it by motor run without Rotate with stopping, it maintains outside low-temp low-pressure except extracting evaporator inner vapor out in time, also improve refrigerant by compression and steam The pressure and temperature of gas, create the heat of the refrigerant vapour condition that outwardly surrounding medium shifts.I.e. by low-temp low-pressure system Refrigerant vapor compression is to high-temperature high-pressure state.
Condenser is a heat-exchange apparatus, and effect is using environment cooling refrigerant, by the high temperature from compressor 250 The heat of high-pressure refrigeration steam is taken away, and makes the cooling of high-temperature high-pressure refrigerant steam, is condensed into the refrigerant liquid of high normal pressure and temperature.
The refrigerant liquid of high normal pressure and temperature is sent directly into evaporator, according to saturation pressure and saturation temperature --- and it is corresponding former Reason, the pressure of refrigerant liquid is reduced, so as to reduce the temperature of refrigerant liquid.The refrigerant liquid of high normal pressure and temperature is passed through into section Device 240 is flowed, obtains low-temperature low-pressure refrigerant, is re-fed into heat absorption evaporation in evaporator.It can typically be used in air conditioner 10 Capillary is as throttling arrangement 240.
Evaporator is also a heat-exchange apparatus.Low-temperature low-pressure refrigerant liquid evaporation (boiling) change in it after throttling For steam, ambient heat is absorbed, declines environment temperature.
Refrigerant flow direction switching device 260 is used for the flow direction for switching refrigerant in compression kind of refrigeration cycle, such as in air conditioner In 10 heating operations, compressor 250 provides compression refrigerant to indoor set heat-exchanging component 110, and indoor set heat-exchanging component 110 is made For condenser, refrigerant is sent into outdoor unit heat exchange group after the condensation of indoor set heat-exchanging component 110, by throttling arrangement 240 Part 210, outdoor unit heat-exchanging component 210 absorb outside heat, refrigerant then are re-fed into compressor 250.In air conditioner 10 In process of refrigerastion, compressor 250 to outdoor unit heat-exchanging component 210 provide compression refrigerant, using outdoor unit heat-exchanging component 210 as Condenser, refrigerant are sent into indoor set heat-exchanging component after the condensation of outdoor unit heat-exchanging component 210, by throttling arrangement 240 110, indoor set heat-exchanging component 110 absorbs outside heat, cools down the air of surrounding, has the function that to air cooling-down, dehumidifies, so Refrigerant is re-fed into compressor 250 afterwards.
Indoor set blower fan 120 and outdoor unit blower fan 220 in other refrigeration system produce and indoor set heat-exchanging component respectively 110 and outdoor unit heat-exchanging component 210 carry out heat exchange air-flow.
Because air conditioner 10 is in use placement process, machine heat-exchanging component 110 and outdoor unit heat-exchanging component 210 indoors are understood On save bit by bit dust, air conditioner 10 turns into institute's potential pollution sources in the environment.The automatically cleaning technology occurred in the prior art, typically Indoor set heat-exchanging component 110 is directed to, and to outdoor unit heat-exchanging component 120 without special cleaning means, but save bit by bit for a long time Dust, necessarily cause the heat exchange efficiency of outdoor unit heat-exchanging component 210 to decline, this does not cause enough loyalties in the prior art It is real.
The air conditioner 10 of the present embodiment is in view of the above-mentioned problems, take following structure to improve:Outdoor unit heat-exchanging component 210 wraps Include:The first outdoor heat exchanger 211 and the second outdoor heat exchanger 212 of concatenation, wherein the first outdoor heat exchanger 211 passes through refrigeration Agent flows to switching device 260 and is connected to compressor 250, is set between the first outdoor heat exchanger 211 and the second outdoor heat exchanger 212 There is electric expansion valve 230.Second outdoor heat exchanger 212 is communicated to indoor set heat-exchanging component 110 by throttling arrangement 240.Electronics Remain on, will not be impacted to freezing or heating in the course of normal operation of expansion valve 230, carrying out automatically cleaning mistake Cheng Zhong, the regulation that the aperture of electric expansion valve 230 can be controlled.
The air conditioner 10 of the present embodiment is also provided with automatically cleaning controller 150, and the automatically cleaning controller 150 can be by air-conditioning 10 original control panel of device is by configuring automatically cleaning control program or being realized by preset automatically cleaning control logic, due to certainly The hardware construction of controller 150 itself is cleaned known by those skilled in the art, is not repeated herein.
Automatically cleaning controller 150 carries out the process that automatically cleaning controls:Receive air conditioner 10 and open touching for self-cleaning function Signal (such as the automatically cleaning control instruction that user is issued by remote control or the Man Machine Interface of air conditioner 10 is received, Or air conditioner 10 determines to need to carry out automatically cleaning and caused triggering command according to itself working condition);It is above-mentioned receiving Refrigerant flow direction switching device 260 is adjusted to compressor 250 to indoor set heat-exchanging component 110 after trigger signal compression system is provided The state (namely switching to the heating state of air conditioner 10, if being in heating state, keep the state) of cryogen;Pass through tune Save the aperture of electric expansion valve 230 so that the continuous surface frosting of the first outdoor heat exchanger 211, it is flushable enough so as to save bit by bit The water of first outdoor heat exchanger 211.After default first defrost condition is met, switching refrigerant flow direction switching device 260, make Refrigerant flow direction commutates so that the first outdoor heat exchanger discharges heat, and to carry out defrost, the water formed using defrost takes away attachment Pollutant, realize the automatically cleaning of the first outdoor heat exchanger.
Automatically cleaning controller 150 continues to adjust the aperture of electric expansion valve 230 so that the table of the second outdoor heat exchanger 212 Frosting is continued in face, after the commutation of refrigerant flow direction switching device 260, due to the throttling action of electric expansion valve 230, outside second Room Heat exchanger 212 is as main evaporator, so as to reduce the temperature fluctuation of indoor set heat-exchanging component 110.Meeting to preset The second defrost condition after, the aperture of electric expansion valve 230 is opened to maximum, make the second outdoor heat exchanger 212 discharge heat, The water formed using defrost takes away the pollutant of attachment, realizes the automatically cleaning of the second outdoor heat exchanger 212 to carry out defrost.
Process is cleaned by above-mentioned segmented, the shadow to indoor set heat-exchanging component 110 can be reduced during cleaning Ring, avoid the fluctuation of the temperature of its working environment.
Automatically cleaning controller 150 is by adjusting the aperture of electric expansion valve 230 so that the table of the first outdoor heat exchanger 211 Face continues Frost formation process:Detect temperature (such as the coil pipe of the first outdoor heat exchanger 211 of the first outdoor heat exchanger 211 Temperature);According to the aperture of the temperature adjustment electric expansion valve 230 of the first outdoor heat exchanger 211 so that the first outdoor heat exchanger The first design temperature is down at a temperature of 211;Electricity when keeping being down to the first design temperature at a temperature of the first outdoor heat exchanger 211 The aperture of sub- expansion valve 230, make the continuous surface frosting of the first outdoor heat exchanger 211, until meeting the first defrost condition of setting; After the first defrost condition of satisfaction, switching refrigerant flow direction switching device 260, refrigerant flow direction is set to commutate so that first is outdoor Heat exchanger 211 discharges heat, and to carry out defrost, the water formed using defrost takes away the pollutant of attachment, realizes first Room The automatically cleaning of external heat exchanger 211
Above-mentioned first defrost condition includes:The second design temperature or electricity are down at a temperature of first outdoor heat exchanger 211 The time that the aperture of sub- expansion valve 230 is kept is less than the first design temperature more than the first setting time, the second design temperature.Full After the above-mentioned first defrost condition of foot, it is believed that First Heat Exchanger frosting is completed.And in First Heat Exchanger Frost formation process In, compressor 250 can maintain its operating frequency inconvenient, and close indoor set blower fan 120 and outdoor unit blower fan 220.
Automatically cleaning controller 150 is after it is determined that reach the first defrost condition so that the first outdoor heat exchanger 211 discharges heat Amount, it is changed to the first outdoor heat exchanger 211 and is run with condenser state, so as to discharge heat, to carry out defrost, utilize defrost shape Into water take away the pollutant of attachment, realize the automatically cleaning of the first outdoor heat exchanger 211.Automatically cleaning controller 150 is in the first Room If it is confirmed that the temperature in the first outdoor heat exchanger 211 reaches default first change during external heat exchanger 211 discharges heat After white cut-off temperature, determine that the automatically cleaning of the first outdoor heat exchanger 211 is completed.
Electric expansion valve 230 is after aperture is adjusted, it is possible to achieve throttling action, in above process the second outdoor heat exchanger 212 can keep refrigerating state, are still run as evaporator, efficiently reduce indoor set heat-exchanging component 110 to ring around The influence in border, avoid and export the discomfort that cold wind is brought to user.
Automatically cleaning controller 150 can also continue to execution the after the automatically cleaning process of the first outdoor heat exchanger 211 is completed The automatically cleaning process of two outdoor heat exchangers 212, namely by adjusting the aperture of electric expansion valve 230 so that the second outdoor heat exchange Frosting is continued on the surface of device 212, until after meeting default second defrost condition, make electric expansion valve 230 aperture open to Maximum, the second outdoor heat exchanger 212 is set to discharge heat, the water formed using defrost takes away the pollutant of attachment, realizes second Room The automatically cleaning of external heat exchanger is to carry out defrost.Second defrost condition includes:The 4th is down at a temperature of second outdoor heat exchanger 212 The time that the aperture of design temperature or electric expansion valve 230 is kept is more than the second setting time;4th design temperature is less than the Three design temperatures.
Therefore during the automatically cleaning of above-mentioned second outdoor heat exchanger 212, its process and the first outdoor heat exchanger 211 from Cleaning process is similar, namely realizes throttling action using electric expansion valve 230, the second outdoor heat exchanger 212 is continued frosting, The water of enough cleanings is saved bit by bit, it is rear to open electric expansion valve 230, rapid defrost, reach automatically cleaning purpose.Automatically cleaning controller 150 the second outdoor heat exchanger 212 discharge heat during if it is confirmed that the temperature in the second outdoor heat exchanger 212 reaches pre- If the second defrost cut-off temperature after, determine the second outdoor heat exchanger 212 automatically cleaning complete.
During above-mentioned automatically cleaning, the first design temperature, the second design temperature, the 3rd design temperature, the 4th setting temperature Degree, the first defrost cut-off temperature, the second defrost cut-off temperature can be according to the actual specifications and running environment of air conditioner 10 Carry out test to draw, such as the first design temperature and the 3rd design temperature could be arranged to -5 DEG C, the second design temperature and the 4th Design temperature could be arranged to -15 DEG C, and (above-mentioned numerical value enters to a certain specific air conditioner in the case that outdoor is 30 DEG C indoors The result that row test is drawn, according to circumstances can be adjusted within the specific limits in the specific implementation).First setting time and Second setting time also can accordingly be set, and be avoided under special operation condition, be changed outside the first outdoor heat exchanger 211 or second Room Hot device 212 is unable to reach the second design temperature and the 4th design temperature.First defrost cut-off temperature, the second defrost cut-off temperature can To draw according to carrying out test to the heat transfer process of the first outdoor heat exchanger 211 and the second outdoor heat exchanger 212, such as can be with Set 50 DEG C.After automatically cleaning is completed, outdoor unit blower fan 220 can be made to blow outdoor unit heat exchanger component 210 is dried.
Above-mentioned self-cleaning process, it is necessary to switch refrigerant stream and start and stop compressor 250, may bring extra Energy consumption, therefore automatically cleaning controller 150 can be surveyed first after the trigger signal of the unlatching self-cleaning function of air conditioner 10 is received Measure the operating ambient temperature of air conditioner room unit 100;When operating ambient temperature is more than five design temperatures, by electric expansion valve 130 are placed in slave mode;When operating ambient temperature is less than five design temperatures, the initial unlatching of electric expansion valve 230 is kept State, and perform the overall automatically cleaning process of outdoor unit heat-exchanging component 210.Such as when the 5th design temperature is arranged into 26 DEG C, Think that overall automatically cleaning can be carried out to outdoor unit heat-exchanging component 210 in the environment less than 26 DEG C.If environment temperature is higher than In 26 DEG C, the above-mentioned outdoor heat exchanger 212 of first outdoor heat exchanger 211 and second can be performed and distinguish self-cleaning process.Need What is illustrated is that above-mentioned 5th design temperature is set as 26 DEG C by way of example only, can basis when the present embodiment is embodied The real experiences of user are needed to set the 5th design temperature.
The embodiment of the present invention additionally provides a kind of automatically cleaning control method of outdoor unit 200 of air conditioner 10, the air conditioner 10 The automatically cleaning control method of outdoor unit 100 be used to carry out automatically cleaning control to the air conditioner 10 in above-described embodiment, and can be with Performed by the automatically cleaning controller 150 in above-described embodiment, Fig. 3 is the room of air conditioner 10 according to an embodiment of the invention The schematic diagram of the outer automatically cleaning control method of machine 200, the automatically cleaning control method of outdoor unit 200 of the air conditioner 10 in general manner can be with Including:
Step S302, receive air conditioner 10 and open the trigger signal of self-cleaning function, such as receive user and pass through remote control Device automatically cleaning control instruction or air conditioner 10 that either the Man Machine Interface of air conditioner 10 issues is true according to itself working condition Surely need to carry out automatically cleaning and caused triggering command.
Step S304, refrigerant flow direction switching device is adjusted to compressor 250 to indoor set heat-exchanging component 110 pressure is provided The state of contraction cryogen, namely the heating state of air conditioner 10 is switched to, if being in heating state, keep the state;
Step S306, by the aperture for adjusting electric expansion valve 230 so that the continuous surface of the first outdoor heat exchanger 211 Frosting;
Step S308, after default first defrost condition is met, switching refrigerant flow direction switching device 260 makes refrigerant Flow direction commutation so that the first outdoor heat exchanger 211 discharges heat, and to carry out defrost, the water formed using defrost takes away attachment Pollutant, realize the automatically cleaning of first outdoor heat exchanger 211;
Step S310, by the aperture for adjusting electric expansion valve 230 so that continue on the surface of the second outdoor heat exchanger 212 Frosting;
Step S312, after until meeting default second defrost condition, the aperture of electric expansion valve 230 is set to open to most Greatly, the second outdoor heat exchanger 212 is made to discharge heat, the water formed using defrost takes away the pollutant of attachment, realizes outside second Room The automatically cleaning of heat exchanger 212 is to carry out defrost.
Fig. 4 is that is realized in the automatically cleaning control method of outdoor unit 200 of air conditioner 10 according to an embodiment of the invention The self-cleaning flow chart of one outdoor heat exchanger 211, the flow specifically include:
Step S402, the temperature of the first outdoor heat exchanger 211 is detected, such as can be by obtaining the first outdoor heat exchanger 211 coil temperature obtains.
Step S404, according to the aperture of the temperature adjustment electric expansion valve 230 of the first outdoor heat exchanger 211 so that first The first design temperature is down at a temperature of outdoor heat exchanger 211;
Step S406, electric expansion valve 230 when keeping being down to the first design temperature at a temperature of the first outdoor heat exchanger 211 Aperture, make the continuous surface frosting of the first outdoor heat exchanger 211, until meet setting the first defrost condition, the first defrost bar Part includes:The aperture holding of the second design temperature or electric expansion valve 230 is down at a temperature of first outdoor heat exchanger 211 Time is less than the first design temperature more than the first setting time, the second design temperature.
Step S408, after the first defrost condition of satisfaction, refrigerant flow direction is commutated, make the first outdoor heat exchanger 211 Heat is discharged, to carry out defrost.
Step S410, after the temperature of the first outdoor heat exchanger 211 reaches default first defrost cut-off temperature, determine The automatically cleaning of one outdoor heat exchanger 211 is completed.
After the first outdoor heat exchanger 211 completes automatically cleaning, the automatically cleaning control of outdoor unit 200 of the air conditioner 10 of the present embodiment Method processed further can also carry out automatically cleaning to the second outdoor heat exchanger 212.Fig. 5 is sky according to an embodiment of the invention Adjust the self-cleaning flow chart that the second outdoor heat exchanger 212 is realized in the automatically cleaning control method of outdoor unit 200 of device 10, second Room The automatically cleaning process of external heat exchanger 212 includes:
Step S502, detect the temperature of the second outdoor heat exchanger 212;
Step S504, according to the aperture of the temperature adjustment electric expansion valve 230 of the second outdoor heat exchanger 212 so that second The 3rd design temperature is down at a temperature of outdoor heat exchanger 212;
Step S506, electric expansion valve 230 when keeping being down to three design temperatures at a temperature of the second outdoor heat exchanger 212 Aperture, make the continuous surface frosting of the second outdoor heat exchanger 212, until meet the second defrost condition;
Step S508, after the second defrost condition of satisfaction, the aperture of electric expansion valve 230 is opened to maximum, make second Outdoor heat exchanger 212 discharges heat;
Step S510, after the temperature of the second outdoor heat exchanger 212 reaches default second defrost cut-off temperature, determine The automatically cleaning of two outdoor heat exchangers 212 is completed.
Above-mentioned self-cleaning process, it is necessary to switch refrigerant stream and start and stop compressor 250, may bring extra Energy consumption, therefore automatically cleaning controller 150 can be surveyed first after the trigger signal of the unlatching self-cleaning function of air conditioner 10 is received Measure the operating ambient temperature of air conditioner room unit 100;When operating ambient temperature is more than five design temperatures, by electric expansion valve 130 are placed in slave mode;When operating ambient temperature is less than five design temperatures, the initial unlatching of electric expansion valve 230 is kept State, and perform the overall automatically cleaning process of outdoor unit heat-exchanging component 210.Such as when the 5th design temperature is arranged into 26 DEG C, Think that overall automatically cleaning can be carried out to outdoor unit heat-exchanging component 210 in the environment less than 26 DEG C.If environment temperature is higher than 26 DEG C, the above-mentioned outdoor heat exchanger 212 of first outdoor heat exchanger 211 and second can be performed and distinguish self-cleaning process.Need Bright is that above-mentioned 5th design temperature is set as 26 DEG C by way of example only, can be according to need when the present embodiment is embodied The real experiences of user are wanted to set the 5th design temperature.
During above-mentioned automatically cleaning, the first design temperature, the second design temperature, the 3rd design temperature, the 4th setting temperature Degree, the first defrost cut-off temperature, the second defrost cut-off temperature can be according to the actual specifications and running environment of air conditioner 10 Carry out test to draw, such as the first design temperature and the 3rd design temperature could be arranged to -5 DEG C, the second design temperature and the 4th Design temperature could be arranged to -15 DEG C, and (above-mentioned numerical value enters to a certain specific air conditioner in the case that outdoor is 30 DEG C indoors The result that row test is drawn, according to circumstances can be adjusted within the specific limits in the specific implementation).First setting time and Second setting time also can accordingly be set, and be avoided under special operation condition, be changed outside the first outdoor heat exchanger 211 or second Room Hot device 212 is unable to reach the second design temperature and the 4th design temperature.First defrost cut-off temperature, the second defrost cut-off temperature can To draw according to carrying out test to the heat transfer process of the first outdoor heat exchanger 211 and the second outdoor heat exchanger 212, such as can be with Set 50 DEG C.After automatically cleaning is completed, outdoor unit blower fan 220 can be made to blow outdoor unit heat exchanger component 210 is dried.
So that the first design temperature and the 3rd design temperature are arranged into -5 DEG C, the second design temperature and the 4th design temperature are set - 15 DEG C are set to, defrost temperature setting is 50 DEG C, and the first setting time and the second setting time are arranged to 10 minutes, the first defrost Cut-off temperature, the second defrost cut-off temperature are arranged to 50 DEG C, and the 5th design temperature is arranged to exemplified by 26 DEG C.To completing whole outdoor The process of machine heat-exchanging component 210 is introduced, and Fig. 6 is the outdoor unit according to the air conditioner 10 of a specific embodiment of the invention The specific implementation flow chart of 200 automatically cleaning control methods, the flow include:
Step S602, in the heating operations of air conditioner 10, receive the trigger signal that air conditioner 10 opens self-cleaning function;
Step S604, obtains the environment temperature of the working environment of indoor set 100, and judges whether the environment temperature is higher than 26 DEG C, if less than 26 DEG C, step S640 is performed, performs the overall automatically cleaning process of outdoor unit heat-exchanging component 210;
Step S606, when environment temperature is higher than 26 DEG C, refrigerant flow direction switching device is adjusted to compressor 250 to room Interior machine heat-exchanging component 110 provides the state of compression refrigerant, namely keeps the heating state of air conditioner 10;
Step S608, indoor set blower fan 120 and outdoor unit blower fan 220 are shut down, and compressor 250 is transported by default target frequency Turn that (goal-selling frequency selects according to indoor and outdoor temperature, such as outdoor is under conditions of 30 DEG C indoors, be could be arranged to 50Hz);
Step S610, the coil temperature TP1 of the first outdoor heat exchanger 211 is detected, reduces the aperture of electric expansion valve 230, TP1 is set to gradually decrease down -5 DEG C;
Step S612, the aperture of electric expansion valve 230, makes the table of the first outdoor heat exchanger 211 when holding TP1 drops to -5 DEG C Face continues frosting;
Step S614, judges whether TP1 drops to -15 DEG C;
Step S616, judge that the aperture of electric expansion valve 230 continued the retention time more than 10 minutes;
Step S618, either condition meets in TP1 drops to -15 DEG C and aperture continued the retention time more than 10 minutes When, refrigerant flow direction switching device (four-way valve) 260 commutates so that the first outdoor heat exchanger 211 discharges heat, to be changed Frost, the water formed using defrost take away the pollutant of attachment, realize the automatically cleaning of the first outdoor heat exchanger 211;
Step S620, judges whether TP1 reaches 50 DEG C of the first defrost cut-off temperature;
Step S622, the automatically cleaning of the first outdoor heat exchanger 211 terminate;
Step S624, detect the coil temperature TP2 of First Heat Exchanger;
Step S626, the aperture of electric expansion valve 230 is adjusted, TP2 is gradually decreased down -5 DEG C;
Step S628, the aperture of electric expansion valve 230, makes the table of the second outdoor heat exchanger 212 when holding TP2 drops to -5 DEG C Face continues frosting;
Step S630, judges whether TP2 drops to -15 DEG C;
Step S632, judge that the aperture of electric expansion valve 230 continued the retention time more than 10 minutes;
Step S634, either condition meets in TP2 drops to -15 DEG C and aperture continued the retention time more than 10 minutes When, the aperture of electric expansion valve 230 is opened to maximum, the second outdoor heat exchanger 212 is discharged heat, formed using defrost Water takes away the pollutant of attachment, realizes the automatically cleaning of the second outdoor heat exchanger 212;
Step S636, judges whether TP2 reaches the second defrost cut-off temperature and set 50 DEG C;
Step S638, the automatically cleaning of the second outdoor heat exchanger 212 terminate.
During the above method is embodied, above-mentioned specific judgment threshold numerical value can be according to air conditioner 10 Specification, running environment, user's custom are adjusted, and above-mentioned concrete numerical value is only to enumerate.
The automatically cleaning control method of outdoor unit 200 of the air conditioner 10 of the present embodiment, carries out the first outdoor heat exchanger 211 respectively And second outdoor heat exchanger 212 perform automatically cleaning process respectively, effectively outdoor unit heat-exchanging component 210 is cleaned, carried Its high heat exchange efficiency, and the influence to indoor set is small, prevents indoor temperature from the big ups and downs of temperature occur, is brought to user More preferably usage experience.
So far, although those skilled in the art will appreciate that detailed herein have shown and described multiple showing for the present invention Example property embodiment, still, still can be direct according to present disclosure without departing from the spirit and scope of the present invention It is determined that or derive many other variations or modifications for meeting the principle of the invention.Therefore, the scope of the present invention is understood that and recognized It is set to and covers other all these variations or modifications.

Claims (10)

  1. A kind of 1. outdoor unit automatically cleaning control method of air conditioner, wherein the refrigeration system of the air conditioner is included by refrigerant pipe Indoor set heat-exchanging component, refrigerant flow direction switching device, compressor, outdoor unit heat-exchanging component and the throttling that road is sequentially connected in series Device, wherein the outdoor unit heat-exchanging component includes:The first outdoor heat exchanger and the second outdoor heat exchanger of concatenation, wherein institute State the first outdoor heat exchanger and the compressor, first outdoor heat exchanger are connected to by the refrigerant flow direction switching device Electric expansion valve is provided between second outdoor heat exchanger, and the control method includes:
    Receive the trigger signal that the air conditioner opens self-cleaning function;
    The refrigerant flow direction switching device is adjusted to the compressor to the indoor set heat-exchanging component compression refrigeration is provided The state of agent;
    Adjust the aperture of the electric expansion valve so that the continuous surface frosting of first outdoor heat exchanger;
    After default first defrost condition is met, switch the refrigerant flow direction switching device, change the refrigerant flow direction To so that first outdoor heat exchanger discharges heat, and to carry out defrost, the water formed using defrost takes away the pollution of attachment Thing, realize the automatically cleaning of first outdoor heat exchanger;
    By the aperture for adjusting the electric expansion valve so that frosting is continued on the surface of second outdoor heat exchanger, until full After the default second defrost condition of foot, the aperture of the electric expansion valve is opened to maximum, make second outdoor heat exchanger Heat is discharged, the water formed using defrost takes away the pollutant of attachment, realizes the automatically cleaning of second outdoor heat exchanger.
  2. 2. control method according to claim 1, wherein, adjust the aperture of the electric expansion valve so that described first The step of continuous surface frosting of outdoor heat exchanger, includes:
    Detect the temperature of first outdoor heat exchanger;
    Reduce the aperture of the electric expansion valve according to the temperature of first outdoor heat exchanger so that first outdoor heat exchange The first design temperature is down at a temperature of device;
    Keep being down to the aperture of electric expansion valve during the first design temperature at a temperature of first outdoor heat exchanger, make institute The first outdoor heat exchanger continuous surface frosting is stated, until meeting the first defrost condition.
  3. 3. control method according to claim 1 or 2, wherein,
    The first defrost condition includes:The second design temperature or the electricity are down at a temperature of first outdoor heat exchanger The time that the aperture of sub- expansion valve is kept, second design temperature was less than the described first setting temperature more than the first setting time Degree.
  4. 4. control method according to claim 1 or 2, wherein, causing the first outdoor heat exchanger release heat During also include:
    Detect the temperature of first outdoor heat exchanger;
    After the temperature of first outdoor heat exchanger reaches default first defrost cut-off temperature, determine that first outdoor is changed The automatically cleaning of hot device is completed.
  5. 5. control method according to claim 1, wherein, by the aperture for adjusting the electric expansion valve so that described The step of surface continuation frosting of second outdoor heat exchanger, includes:
    Detect the temperature of second outdoor heat exchanger;
    According to the aperture of electric expansion valve described in the temperature adjustment of second outdoor heat exchanger so that second outdoor heat exchange The 3rd design temperature is down at a temperature of device;
    Keep being down to the aperture of electric expansion valve during three design temperatures at a temperature of second outdoor heat exchanger, make institute The second outdoor heat exchanger continuous surface frosting is stated, until meeting the second defrost condition.
  6. 6. control method according to claim 5, wherein,
    The second defrost condition includes:The 4th design temperature or the electricity are down at a temperature of second outdoor heat exchanger The time that the aperture of sub- expansion valve is kept, the 4th design temperature was less than the described 3rd setting temperature more than the second setting time Degree.
  7. 7. control method according to claim 1 or 2, wherein, causing the second outdoor heat exchanger release heat During also include:
    Detect the temperature of second outdoor heat exchanger;
    After the temperature of second outdoor heat exchanger reaches default second defrost cut-off temperature, determine to change outside the second Room The automatically cleaning of hot device is completed.
  8. 8. a kind of air conditioner, including refrigeration system and automatically cleaning controller, wherein
    The refrigeration system includes:The indoor set heat-exchanging component that is sequentially connected in series by refrigerant line, refrigerant flow direction switching device, Compressor, outdoor unit heat-exchanging component and throttling arrangement, wherein the outdoor unit heat-exchanging component includes:The first of concatenation is outdoor Heat exchanger and the second outdoor heat exchanger, wherein the second Room external heat exchanger is connected by the refrigerant flow direction switching device To the compressor, electric expansion valve is provided between first outdoor heat exchanger and second outdoor heat exchanger;
    The automatically cleaning controller, is electrically connected, and be configured to the refrigeration system:Receive the air conditioner and open automatically cleaning work( The trigger signal of energy;The refrigerant flow direction switching device is adjusted to the compressor to the indoor set heat-exchanging component and provided The state of compression refrigerant;Adjust the aperture of the electric expansion valve so that the continuous surface knot of first outdoor heat exchanger Frost;After default first defrost condition is met, switch the refrigerant flow direction switching device, change the refrigerant flow direction To so that first outdoor heat exchanger discharges heat, and to carry out defrost, the water formed using defrost takes away the pollution of attachment Thing, realize the automatically cleaning of first outdoor heat exchanger;By the aperture for adjusting the electric expansion valve so that the second Room Frosting is continued on the surface of external heat exchanger, until after meeting default second defrost condition, beats the aperture of the electric expansion valve Open to maximum, make the second outdoor heat exchanger release heat, the water formed using defrost is taken away the pollutant of attachment, realizes institute The automatically cleaning of the second outdoor heat exchanger is stated to carry out defrost.
  9. 9. air conditioner according to claim 8, wherein the automatically cleaning controller is configured to:
    Detect the temperature of first outdoor heat exchanger;
    Reduce the aperture of the electric expansion valve according to the temperature of first outdoor heat exchanger so that first outdoor heat exchange The first design temperature is down at a temperature of device;
    Keep being down to the aperture of electric expansion valve during the first design temperature at a temperature of first outdoor heat exchanger, make institute The first outdoor heat exchanger continuous surface frosting is stated, until meeting the first defrost condition, the first defrost condition includes:Institute The time that the aperture holding of the second design temperature or the electric expansion valve is down at a temperature of stating the first outdoor heat exchanger surpasses The first setting time is crossed, second design temperature is less than first design temperature;
    After the temperature of first outdoor heat exchanger reaches default first defrost cut-off temperature, determine that first outdoor is changed The automatically cleaning of hot device is completed.
  10. 10. air conditioner according to claim 8, wherein the automatically cleaning controller is configured to:
    Detect the temperature of second outdoor heat exchanger;
    According to the aperture of electric expansion valve described in the temperature adjustment of second outdoor heat exchanger so that second outdoor heat exchange The 3rd design temperature is down at a temperature of device;
    Keep being down to the aperture of electric expansion valve during three design temperatures at a temperature of second outdoor heat exchanger, make institute The second outdoor heat exchanger continuous surface frosting is stated, until meeting the second defrost condition, the second defrost condition includes:Institute The time that the aperture holding of the 4th design temperature or the electric expansion valve is down at a temperature of stating the second outdoor heat exchanger surpasses The second setting time is crossed, the 4th design temperature is less than the 3rd design temperature;
    After the temperature of second outdoor heat exchanger reaches default second defrost cut-off temperature, determine to change outside the second Room The automatically cleaning of hot device is completed.
CN201710641148.7A 2017-07-31 2017-07-31 Air conditioner and outdoor unit self-cleaning control method thereof Active CN107525220B (en)

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CN108758961A (en) * 2018-04-17 2018-11-06 青岛海信日立空调系统有限公司 A kind of air-conditioner outdoor unit dust removal method and device
WO2019024721A1 (en) * 2017-07-31 2019-02-07 青岛海尔空调器有限总公司 Air conditioner and self-cleaning control method for outdoor unit thereof
WO2019024722A1 (en) * 2017-07-31 2019-02-07 青岛海尔空调器有限总公司 Air conditioner and self-cleaning control method for indoor unit thereof
CN110398038A (en) * 2019-07-29 2019-11-01 宁波奥克斯电气股份有限公司 A kind of outdoor machine of air-conditioner self-cleaning control method, device and air-conditioning system
CN110749096A (en) * 2018-07-23 2020-02-04 青岛海尔新能源电器有限公司 Self-cleaning method and heat pump water heater
CN111380153A (en) * 2020-03-27 2020-07-07 广东美的制冷设备有限公司 High-temperature sterilization control method and device, air conditioner and storage medium
CN112254275A (en) * 2020-10-12 2021-01-22 海信(山东)空调有限公司 Self-cleaning control method for outdoor unit of air conditioner
CN112449672A (en) * 2019-07-03 2021-03-05 日立江森自控空调有限公司 Air conditioner
CN112833594A (en) * 2020-08-27 2021-05-25 青岛海尔新能源电器有限公司 Self-cleaning control method of heat pump water heater and heat pump water heater
CN113251573A (en) * 2021-04-15 2021-08-13 青岛海尔空调器有限总公司 Control method for self-cleaning of double-evaporator air conditioner and double-evaporator air conditioner
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WO2019024721A1 (en) * 2017-07-31 2019-02-07 青岛海尔空调器有限总公司 Air conditioner and self-cleaning control method for outdoor unit thereof
WO2019024722A1 (en) * 2017-07-31 2019-02-07 青岛海尔空调器有限总公司 Air conditioner and self-cleaning control method for indoor unit thereof
CN108758961A (en) * 2018-04-17 2018-11-06 青岛海信日立空调系统有限公司 A kind of air-conditioner outdoor unit dust removal method and device
CN108758961B (en) * 2018-04-17 2021-02-02 青岛海信日立空调系统有限公司 Dust removal method and device for outdoor unit of air conditioner
CN110749096A (en) * 2018-07-23 2020-02-04 青岛海尔新能源电器有限公司 Self-cleaning method and heat pump water heater
CN112449672A (en) * 2019-07-03 2021-03-05 日立江森自控空调有限公司 Air conditioner
CN110398038A (en) * 2019-07-29 2019-11-01 宁波奥克斯电气股份有限公司 A kind of outdoor machine of air-conditioner self-cleaning control method, device and air-conditioning system
CN113474596A (en) * 2019-08-30 2021-10-01 日立江森自控空调有限公司 Air conditioner
CN111380153A (en) * 2020-03-27 2020-07-07 广东美的制冷设备有限公司 High-temperature sterilization control method and device, air conditioner and storage medium
CN112833594A (en) * 2020-08-27 2021-05-25 青岛海尔新能源电器有限公司 Self-cleaning control method of heat pump water heater and heat pump water heater
CN112254275A (en) * 2020-10-12 2021-01-22 海信(山东)空调有限公司 Self-cleaning control method for outdoor unit of air conditioner
CN113251573A (en) * 2021-04-15 2021-08-13 青岛海尔空调器有限总公司 Control method for self-cleaning of double-evaporator air conditioner and double-evaporator air conditioner

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