CN105465970A - Disposal method and disposal device for greasy blockage of air conditioner system and air conditioner - Google Patents
Disposal method and disposal device for greasy blockage of air conditioner system and air conditioner Download PDFInfo
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- CN105465970A CN105465970A CN201511034823.7A CN201511034823A CN105465970A CN 105465970 A CN105465970 A CN 105465970A CN 201511034823 A CN201511034823 A CN 201511034823A CN 105465970 A CN105465970 A CN 105465970A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
-
- 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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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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
- F25B2500/00—Problems to be solved
- F25B2500/04—Clogging
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Combustion & Propulsion (AREA)
- Chemical & Material Sciences (AREA)
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- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Fuzzy Systems (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a disposal method for greasy blockage of an air conditioner system, a disposal device for greasy blockage of the air conditioner system, and an air conditioner, wherein a refrigerant used by the air conditioner system is a flammable refrigerant. The method comprises the following steps: when detecting that greasy blockage occurs to the air conditioner system in preset work state, recording the current opening of an electronic expansion valve; adjusting the opening of the electronic expansion valve to preset opening from the current opening, wherein the preset opening is greater than the current opening; counting the accumulated operation time of the electronic expansion valve working in the preset opening; and when the accumulated operation time reaches the preset time, detecting whether greasy blockage occurs to the air conditioner system, and performing corresponding disposal according to the detection result. By adopting the technical scheme, the problem of greasy blockage can be timely and effectively solved so that the air conditioner system can recover to normal operation, and therefore, the phenomenon of capability attenuation caused by greasy blockage of the air conditioner can be avoided, and the service life of a compressor and the air conditioner system can be ensured.
Description
Technical field
The present invention relates to air-conditioning technical field, in particular to processing method, the oily stifled treating apparatus of a kind of air-conditioning system and a kind of air-conditioner that a kind of air-conditioning system oil is stifled.
Background technology
At present, in technical field of air conditioner refrigeration, most use R410a cold-producing medium carrys out alternative R22 cold-producing medium, it is with the obvious advantage is embodied on convertible frequency air-conditioner, but it is because the GWP (GlobalWarmingPotential, global warming potential) of R410a cold-producing medium is higher, day by day serious at Present Global greenhouse effects, under the background of countries in the world reply global climate transition pay attention to day by day, will be eliminated gradually.Therefore, the low GWP cold-producing medium that more absorbed research is at present representative with R32 cold-producing medium, R290 cold-producing medium, particularly for this cold-producing medium almost not having any pollution of R290 cold-producing medium, simultaneously, the research and development of corresponding compressor are also underway, particularly the lubricating oil research and development of new type compressor, come into one's own day by day.
The normal operation of lubricating oil in cooler compressor to system is extremely important, and lubricating oil plays a part cylinder and rotor lubrication, sealing and cooling.When compressor runs well, lubricating oil sucks cylinder by bent axle bottom compressor, cold-producing medium with HTHP after overcompression enters system, afterwards along with refrigerant circulation is got back to bottom compressor again, simultaneously the heat that produces of compressor electric motor and cylinder also can cooled dose and lubricating oil be taken away.If cause oil return return-air not smooth for some reason, the problems such as compressor lubrication shortage of oil, motor idle running heating will be caused, will causing further weares and teares between compresser cylinder and rotor strengthens, internal temperature is too high, finally causes burn-down of electric motor, system crash.So when system, must ensure that lubricating oil can normally return compressor and motor heat is discharged timely.
But, for combustible refrigerant-R290 cold-producing medium, its viscosity can sharply increase at low temperatures, particularly in changes in temperature frequency changer, when terminating cross valve commutation when defrosting, super low temperature refrigeration agent in evaporimeter (indoor heat exchanger) and lubricating oil need by throttling arrangement (such as, electric expansion valve) enter condenser (outdoor heat exchanger), simultaneously combustible refrigerant because of security consideration charging amount less, therefore the pressure ratio R410a cold-producing medium of air-conditioning system, the pressure of the air-conditioning system of R32 cold-producing medium is much little, thus the oil that ratio of viscosities can be caused larger blocking throttling arrangement, cause combustible refrigerant cannot participate in circulation, and then compressor is dallied, ability and operate power decline, system oil starvation lacks fluorine, the motor excessive heating of compressor after long time running, greatly reduce the service life of compressor and system, the use sense affecting user is subject to, the appearance of this problem is simultaneously also for design uses the air-conditioning system of combustible refrigerant to cause very large impact.
Therefore, how air-conditioning system occur oil stifled time, solving the stifled problem of oil timely and effectively makes air-conditioning system recover to run well, and then avoid air-conditioning system to occur the phenomenon that ability decays because oil blocks up, to ensure the service life of compressor and air-conditioning system, improve the comfort of air-conditioning system simultaneously, become technical problem urgently to be resolved hurrily.
Summary of the invention
The present invention is intended at least to solve one of technical problem existed in prior art or correlation technique.
For this reason, one object of the present invention is to propose the stifled processing method of a kind of air-conditioning system oil.
Another object of the present invention is to propose the stifled treating apparatus of a kind of air-conditioning system oil.
Another object of the present invention is to propose a kind of air-conditioner.
For realizing at least one object above-mentioned, embodiment according to a first aspect of the invention, propose the processing method that a kind of air-conditioning system oil is stifled, the cold-producing medium that described air-conditioning system uses is combustible refrigerant, described air-conditioning system comprises electric expansion valve, then described method comprises: when detecting that oily blocking up occurs the described air-conditioning system being in default operating condition, record the current aperture of described electric expansion valve; The aperture of described electric expansion valve is adjusted to default aperture by described current aperture, and described default aperture is greater than described current aperture; Add up described electric expansion valve be operated in described default aperture under accumulated running time; When described accumulated running time reaches Preset Time, detect described air-conditioning system and whether occur oily stifled, to process accordingly according to testing result.
The processing method that the air-conditioning system oil that the embodiment of first aspect present invention provides is stifled, when detecting that the air-conditioning system generation oil being in the duty that easily generation oil is stifled of use combustible refrigerant blocks up, the oil then needing start treatment strategy to solve air-conditioning system timely and effectively blocks up problem, air-conditioning system is made to recover to run well, and then avoid air-conditioning system to occur the phenomenon that ability decays because oil blocks up, to ensure the service life of compressor and air-conditioning system, improve the comfort of air-conditioning system simultaneously, promote Consumer's Experience, particularly, the stifled problem of oil can be solved by the mode of the operation aperture regulating electric expansion valve, that is: there is the current aperture of first recorded electronic expansion valve when oil blocks up, then the aperture of electric expansion valve is adjusted to the default aperture being greater than it by current aperture, and when electric expansion valve reaches Preset Time according to the accumulated running time of default aperture work, whether again detect air-conditioning system occurs oily stifled, and and then determine next step processing policy according to testing result.
In addition, the processing method that the air-conditioning system oil in above-described embodiment provided by the invention is stifled, can also have following additional technical feature:
In technique scheme, preferably, it is described when described accumulated running time reaches Preset Time, whether detect described air-conditioning system occurs oily stifled, to process accordingly according to testing result, specifically comprise: reach described Preset Time when described accumulated running time, and when detecting that oily blocking up occurs described air-conditioning system, the off-premises station operation troubles also described air-conditioning system of prompting closedown of air-conditioning system described in prompting user; Reach described Preset Time when described accumulated running time, and when not detecting that oily blocking up occurs described air-conditioning system, the aperture of described electric expansion valve is adjusted to described current aperture by described default aperture.
In this technical scheme, after the electric expansion valve of air-conditioning system works Preset Time under default aperture, when again detecting that oily blocking up occurs air-conditioning system, the off-premises station operation troubles of user's air-conditioning system then can be pointed out by the mode of sound, word and/or bright light, and prompting directly closes air-conditioning system, make it stop transport, make motor excessive heating to avoid causing because oil is stifled exhaust outlet of compressor exhaust to have some setbacks, and then cause the irremediable loss such as burn-down of electric motor, system crash; And when again detect air-conditioning system do not occur oil stifled time, then need the aperture of the electric expansion valve of air-conditioning system to be remained in operation by the current aperture presetting aperture and be adjusted to record, to extend the service life of product while guaranteeing air-conditioning system normal function.
In above-mentioned arbitrary technical scheme, preferably, the aperture of described electric expansion valve is greater than default aperture.
In this technical scheme, in order to better solve the stifled problem of air-conditioning system oil, compressor lubricant oil and combustible refrigerant is made to recover normal circulation as early as possible in air-conditioning system, and then make air-conditioning system recover to run well, aperture is preferably selected to be greater than the electric expansion valve in default aperture, wherein, default aperture can be 1.8mm.
In above-mentioned arbitrary technical scheme, preferably, the span of described default aperture: 450 step ~ 480 steps.
In this technical scheme, the preferably span presetting aperture is 450 step ~ 480 steps, to solve the stifled problem of air-conditioning system oil as early as possible, make air-conditioning system recover as early as possible to run well, and the air-conditioning system recorded occur oil stifled before the span of current aperture be generally 100 step ~ 400 steps.
In above-mentioned arbitrary technical scheme, preferably, described default operating condition comprises: the duty that the duty that described air-conditioning system defrost starts, described air-conditioning system defrost terminate, described air-conditioning system are in the duty of low-temperature heating and described air-conditioning system and operate in duty lower than default environment temperature; Described combustible refrigerant is R290 cold-producing medium.
In this technical scheme, the default operating condition that air-conditioning system oil easily occurs stifled includes but not limited to: the duty that air-conditioning system defrost starts, the duty that air-conditioning system defrost terminates, air-conditioning system is in start and is in the duty of low-temperature heating and air-conditioning system and operates in duty lower than default environment temperature, wherein, defrost terminates, defrost start and low-temperature heating duty under the air-conditioning system probability that oil occurs stifled reduce successively, generally speaking, when cold-producing medium meets with the system environments of the temperature difference of difference more than 30 DEG C within air-conditioning systems, just there will be oil stifled, and when operating in the environment of subzero less than 15 DEG C, also can block up by oil, subzero 30 DEG C time, oil is stifled certainly, in addition, when air-conditioning system is in frequency conversion, severe, when high operating mode or cryogenic refrigeration, also there is the stifled situation of oil.
And for how judging whether air-conditioning system is in default operating condition, particularly, when the postrun accumulative switching times of cross valve start of air-conditioning system is even-times, then can determine the duty that air-conditioning system is in defrost and terminates, so when accumulative switching times is odd-times, then can determine that air-conditioning system is in defrost and starts or be in the duty in defrost process, and the duty being operated in low-temperature heating can be determined according to start parameters, environment temperature can be detected by the existing temperature sensor of air-conditioning system particularly; In addition, combustible refrigerant is preferably low GWP, does not almost have R290 (i.e. propane) cold-producing medium of any pollution.
Embodiment according to a second aspect of the invention, propose the treating apparatus that a kind of air-conditioning system oil is stifled, the cold-producing medium that described air-conditioning system uses is combustible refrigerant, described air-conditioning system comprises electric expansion valve, then described device comprises: logging modle, for when detecting that oily blocking up occurs the described air-conditioning system being in default operating condition, record the current aperture of described electric expansion valve; Control module, for controlling, the aperture of described electric expansion valve is adjusted to default aperture by the described current aperture of described logging modle record, described default aperture is greater than described current aperture; Statistical module, is operated in accumulated running time under described default aperture for adding up described electric expansion valve; Whether detection module, for when the described accumulated running time of described statistical module counts reaches Preset Time, detect described air-conditioning system and occur oily stifled, to process accordingly according to testing result.
The treating apparatus that the air-conditioning system oil that the embodiment of second aspect present invention provides is stifled, when being detected that by detection module the air-conditioning system generation oil being in the duty that easily generation oil is stifled of use combustible refrigerant blocks up, the oil then needing start treatment strategy to solve air-conditioning system timely and effectively blocks up problem, air-conditioning system is made to recover to run well, and then avoid air-conditioning system to occur the phenomenon that ability decays because oil blocks up, to ensure the service life of compressor and air-conditioning system, improve the comfort of air-conditioning system simultaneously, promote Consumer's Experience, particularly, the stifled problem of oil can be solved by the mode of the operation aperture regulating electric expansion valve, that is: occur when oil blocks up first by the current aperture of logging modle recorded electronic expansion valve, then control the aperture of electric expansion valve to be adjusted to the default aperture being greater than it by current aperture by control module, and statistical module counts to electric expansion valve reach Preset Time according to the accumulated running time of default aperture work time, whether again detect air-conditioning system by detection module occurs oily stifled, and and then determine next step processing policy according to testing result.
In addition, the treating apparatus that the air-conditioning system oil in above-described embodiment provided by the invention is stifled, can also have following additional technical feature:
In technique scheme, preferably, also comprise: reminding module, described Preset Time is reached for the described accumulated running time when described statistical module counts, and described detection module detect described air-conditioning system occur oil stifled time, the off-premises station operation troubles of air-conditioning system described in prompting user also points out described control module to control to close described air-conditioning system; And described control module also for: reach described Preset Time when the described accumulated running time of described statistical module counts, and described detection module do not detect described air-conditioning system occur oil stifled time, control the aperture of described electric expansion valve to be adjusted to described current aperture by described default aperture.
In this technical scheme, after the electric expansion valve of air-conditioning system works Preset Time under default aperture, when again detecting that oily blocking up occurs air-conditioning system by detection module, then can be pointed out the off-premises station operation troubles of user's air-conditioning system in the mode of sound, word and/or bright light by reminding module, and point out control module directly to control to close air-conditioning system, make it stop transport, make motor excessive heating to avoid causing because oil is stifled exhaust outlet of compressor exhaust to have some setbacks, and then cause the irremediable loss such as burn-down of electric motor, system crash; And when again detecting that oily blocking up does not occur air-conditioning system by detection module, then need to control the aperture of the electric expansion valve of air-conditioning system to be remained in operation by the current aperture presetting aperture and be adjusted to record by control module, to extend the service life of product while guaranteeing air-conditioning system normal function.
In above-mentioned arbitrary technical scheme, preferably, the aperture of described electric expansion valve is greater than default aperture.
In this technical scheme, in order to better solve the stifled problem of air-conditioning system oil, compressor lubricant oil and combustible refrigerant is made to recover normal circulation as early as possible in air-conditioning system, and then make air-conditioning system recover to run well, aperture is preferably selected to be greater than the electric expansion valve in default aperture, wherein, default aperture can be 1.8mm.
In above-mentioned arbitrary technical scheme, preferably, the span of described default aperture: 450 step ~ 480 steps.
In this technical scheme, the preferably span presetting aperture is 450 step ~ 480 steps, to solve the stifled problem of air-conditioning system oil as early as possible, make air-conditioning system recover as early as possible to run well, and the air-conditioning system recorded occur oil stifled before the span of current aperture be generally 100 step ~ 400 steps.
In above-mentioned arbitrary technical scheme, preferably, described default operating condition comprises: the duty that the duty that described air-conditioning system defrost starts, described air-conditioning system defrost terminate, described air-conditioning system are in the duty of low-temperature heating and described air-conditioning system and operate in duty lower than default environment temperature; Described combustible refrigerant is R290 cold-producing medium.
In this technical scheme, the default operating condition that air-conditioning system oil easily occurs stifled includes but not limited to: the duty that air-conditioning system defrost starts, the duty that air-conditioning system defrost terminates, air-conditioning system is in start and is in the duty of low-temperature heating and air-conditioning system and operates in duty lower than default environment temperature, wherein, defrost terminates, defrost start and low-temperature heating duty under the air-conditioning system probability that oil occurs stifled reduce successively, generally speaking, when cold-producing medium meets with the system environments of the temperature difference of difference more than 30 DEG C within air-conditioning systems, just there will be oil stifled, and when operating in the environment of subzero less than 15 DEG C, also can block up by oil, subzero 30 DEG C time, oil is stifled certainly, in addition, when air-conditioning system is in frequency conversion, severe, when high operating mode or cryogenic refrigeration, also there is the stifled situation of oil.
And for how judging whether air-conditioning system is in default operating condition, particularly, when the postrun accumulative switching times of cross valve start of air-conditioning system is even-times, then can determine the duty that air-conditioning system is in defrost and terminates, so when accumulative switching times is odd-times, then can determine that air-conditioning system is in defrost and starts or be in the duty in defrost process, and the duty being operated in low-temperature heating can be determined according to start parameters, environment temperature can be detected by the existing temperature sensor of air-conditioning system particularly; In addition, combustible refrigerant is preferably low GWP, does not almost have R290 (i.e. propane) cold-producing medium of any pollution.
Embodiment according to a third aspect of the invention we, proposes a kind of air-conditioner, comprises the treating apparatus that the air-conditioning system oil according to any one of above-mentioned second aspect embodiment blocks up.
The air-conditioner that the embodiment of third aspect present invention provides, because of the treating apparatus that the air-conditioning system oil comprised according to any one of above-mentioned second aspect embodiment blocks up, thus can solve the stifled problem of oil timely and effectively makes air-conditioning system recover to run well, and then avoid air-conditioning system to occur the phenomenon that ability decays because oil blocks up, to ensure the service life of compressor and air-conditioning system, improve the comfort of air-conditioning system simultaneously, promote Consumer's Experience.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 shows the schematic flow sheet of the stifled processing method of air-conditioning system according to an embodiment of the invention oil;
Fig. 2 shows the block diagram of the stifled treating apparatus of air-conditioning system according to an embodiment of the invention oil;
Fig. 3 shows the block diagram of air-conditioner according to an embodiment of the invention.
Detailed description of the invention
In order to more clearly understand above-mentioned purpose of the present invention, feature and advantage, below in conjunction with the drawings and specific embodiments, the present invention is further described in detail.It should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine mutually.
Set forth a lot of detail in the following description so that fully understand the present invention; but; the present invention can also adopt other to be different from other modes described here and implement, and therefore, protection scope of the present invention is not by the restriction of following public specific embodiment.
Fig. 1 shows the schematic flow sheet of the stifled processing method of air-conditioning system according to an embodiment of the invention oil.
As shown in Figure 1, the processing method that air-conditioning system oil according to an embodiment of the invention is stifled, the cold-producing medium that described air-conditioning system uses is combustible refrigerant, described air-conditioning system comprises electric expansion valve, then described method comprises: step 102, when detecting that oily blocking up occurs the described air-conditioning system being in default operating condition, record the current aperture of described electric expansion valve; Step 104, is adjusted to default aperture by the aperture of described electric expansion valve by described current aperture, and described default aperture is greater than described current aperture; Step 106, add up described electric expansion valve be operated in described default aperture under accumulated running time; Whether step 108, when described accumulated running time reaches Preset Time, detect described air-conditioning system and occur oily stifled, to process accordingly according to testing result.
The processing method that the air-conditioning system oil that the embodiment of first aspect present invention provides is stifled, when detecting that the air-conditioning system generation oil being in the duty that easily generation oil is stifled of use combustible refrigerant blocks up, the oil then needing start treatment strategy to solve air-conditioning system timely and effectively blocks up problem, air-conditioning system is made to recover to run well, and then avoid air-conditioning system to occur the phenomenon that ability decays because oil blocks up, to ensure the service life of compressor and air-conditioning system, improve the comfort of air-conditioning system simultaneously, promote Consumer's Experience, particularly, the stifled problem of oil can be solved by the mode of the operation aperture regulating electric expansion valve, that is: there is the current aperture of first recorded electronic expansion valve when oil blocks up, then the aperture of electric expansion valve is adjusted to the default aperture being greater than it by current aperture, and when electric expansion valve reaches Preset Time according to the accumulated running time of default aperture work, whether again detect air-conditioning system occurs oily stifled, and and then determine next step processing policy according to testing result, wherein, the span of Preset Time is 5 minutes ~ 10 minutes.
In addition, the processing method that the air-conditioning system oil in above-described embodiment provided by the invention is stifled, can also have following additional technical feature:
In technique scheme, preferably, described step 108 specifically comprises: reach described Preset Time when described accumulated running time, and when detecting that oily blocking up occurs described air-conditioning system, the off-premises station operation troubles also described air-conditioning system of prompting closedown of air-conditioning system described in prompting user; Reach described Preset Time when described accumulated running time, and when not detecting that oily blocking up occurs described air-conditioning system, the aperture of described electric expansion valve is adjusted to described current aperture by described default aperture.
In this technical scheme, after the electric expansion valve of air-conditioning system works Preset Time under default aperture, when again detecting that oily blocking up occurs air-conditioning system, the off-premises station operation troubles of user's air-conditioning system then can be pointed out by the mode of sound, word and/or bright light, and prompting directly closes air-conditioning system, make it stop transport, make motor excessive heating to avoid causing because oil is stifled exhaust outlet of compressor exhaust to have some setbacks, and then cause the irremediable loss such as burn-down of electric motor, system crash; And when again detect air-conditioning system do not occur oil stifled time, then need the aperture of the electric expansion valve of air-conditioning system to be remained in operation by the current aperture presetting aperture and be adjusted to record, to extend the service life of product while guaranteeing air-conditioning system normal function.
In above-mentioned arbitrary technical scheme, preferably, the aperture of described electric expansion valve is greater than default aperture.
In this technical scheme, in order to better solve the stifled problem of air-conditioning system oil, compressor lubricant oil and combustible refrigerant is made to recover normal circulation as early as possible in air-conditioning system, and then make air-conditioning system recover to run well, aperture is preferably selected to be greater than the electric expansion valve in default aperture, wherein, default aperture can be 1.8mm.
In above-mentioned arbitrary technical scheme, preferably, the span of described default aperture: 450 step ~ 480 steps.
In this technical scheme, the preferably span presetting aperture is 450 step ~ 480 steps, to solve the stifled problem of air-conditioning system oil as early as possible, make air-conditioning system recover as early as possible to run well, and the air-conditioning system recorded occur oil stifled before the span of current aperture be generally 100 step ~ 400 steps.
In above-mentioned arbitrary technical scheme, preferably, described default operating condition comprises: the duty that the duty that described air-conditioning system defrost starts, described air-conditioning system defrost terminate, described air-conditioning system are in the duty of low-temperature heating and described air-conditioning system and operate in duty lower than default environment temperature; Described combustible refrigerant is R290 cold-producing medium.
In this technical scheme, the default operating condition that air-conditioning system oil easily occurs stifled includes but not limited to: the duty that air-conditioning system defrost starts, the duty that air-conditioning system defrost terminates, air-conditioning system is in start and is in the duty of low-temperature heating and air-conditioning system operates in lower than default environment temperature (such as,-15 DEG C) duty, wherein, defrost terminates, defrost start and low-temperature heating duty under the air-conditioning system probability that oil occurs stifled reduce successively, generally speaking, when cold-producing medium meets with the system environments of the temperature difference of difference more than 30 DEG C within air-conditioning systems, just there will be oil stifled, and when operating in the environment of subzero less than 15 DEG C, also can block up by oil, subzero 30 DEG C time, oil is stifled certainly, in addition, when air-conditioning system is in frequency conversion, severe, when high operating mode or cryogenic refrigeration, also there is the stifled situation of oil.
And for how judging whether air-conditioning system is in default operating condition, particularly, when the postrun accumulative switching times of cross valve start of air-conditioning system is even-times, then can determine the duty that air-conditioning system is in defrost and terminates, so when accumulative switching times is odd-times, then can determine that air-conditioning system is in defrost and starts or be in the duty in defrost process, and the duty being operated in low-temperature heating can be determined according to start parameters, environment temperature can be detected by the existing temperature sensor of air-conditioning system particularly; In addition, combustible refrigerant is preferably low GWP, does not almost have R290 (i.e. propane) cold-producing medium of any pollution.
Air-conditioning system can be worked as particularly when being in default operating condition, stifled by one of at least determining whether air-conditioning system oil occurs in the inspection policies described in following examples:
Embodiment one: by the system pressure value of the predetermined position of the compressor every the first Preset Time air-conditioning system, and then when decision-making system force value is less than or equal to preset pressure value, determine that oil has occurred air-conditioning system stifled, detected pressures value can be carried out particularly by the pressure detecting module of the exhaust ports or gas returning port place that are arranged on the compressor of air-conditioning system, wherein, when predeterminated position is the gas returning port of compressor, the span of preset pressure value is-0.1 MPa ~ 0.1 MPa, when predeterminated position is the exhaust outlet of compressor, the span of preset pressure value is 0.5 MPa ~ 2 MPa.
Embodiment two: by the back pressure value at the gas returning port place of the exhaust pressure value and compressor that detect the exhaust ports of the compressor of air-conditioning system every the first Preset Time respectively, and then judging that the difference (being preferably absolute value) of exhaust pressure value and back pressure value is less than or equal to preset pressure value (such as, 0.1 atmospheric pressure, i.e. 0.01 MPa) time, determine that oil has occurred air-conditioning system stifled, detected pressures value can be carried out by the pressure detecting module of the exhaust ports and gas returning port place that are arranged on the compressor of air-conditioning system particularly.
Embodiment three: by the return air temperature angle value at the gas returning port place of the outlet air temperature and compressor that detect the exhaust ports of the compressor of air-conditioning system every the first Preset Time respectively, and then judging that the difference of outlet air temperature and return air temperature angle value is less than or equal to preset temperature value (such as, 40 DEG C) time, determine that oil has occurred air-conditioning system stifled, detected temperatures value can be carried out by the temperature detecting module of the exhaust ports and gas returning port place that are arranged on the compressor of air-conditioning system particularly.
Embodiment four: by detecting the system temperature value of the predetermined position of the compressor of air-conditioning system every the first Preset Time, and then when decision-making system temperature value is more than or equal to preset temperature value, determine that oil has occurred air-conditioning system stifled, wherein, predetermined position comprises: the exhaust outlet of compressor, the gas returning port of compressor or the bottom of compressor, the value of corresponding preset temperature value can be: 110 DEG C, 110 DEG C, 80 DEG C ~ 150 DEG C (preferably can be 100 DEG C), particularly can by being arranged on the exhaust ports of the compressor of air-conditioning system, the temperature detecting module of gas returning port place and bottom carrys out detected temperatures value.
Embodiment five: by obtaining the temperature parameter of air-conditioning system every the first Preset Time, temperature parameter comprises: indoor environment temperature, indoor heat exchanger temperature, outdoor environment temperature and outdoor heat exchange actuator temperature, particularly, when the absolute value of the difference judging indoor environment temperature and indoor heat exchanger temperature is less than or equal to the first preset temperature (such as, 0 DEG C ~ 3 DEG C), and/or the absolute value of the difference of outdoor environment temperature and outdoor heat exchange actuator temperature is less than or equal to the second preset temperature (such as, 0 DEG C ~ 3 DEG C) time, determine that oil occurs described air-conditioning system stifled, namely indoor environment temperature and indoor heat exchanger temperature more and more close, outdoor environment temperature and outdoor environment temperature more and more close.
Embodiment six: by detecting the System current of air-conditioning system every the first Preset Time, and then when decision-making system current value is less than or equal to pre-set current value, determine that oil occurs described air-conditioning system stifled, when general oil is stifled, the System current of air-conditioning system declines about 50% than during its normal work.
Embodiment seven: by detect respectively every the first Preset Time first end that combustible refrigerant flows through the throttling arrangement of air-conditioning system to the second end of throttling arrangement time the first system force value at first end place and the second system force value at the second end place, and then judging whether the difference of the first system force value and second system force value is less than or equal to preset pressure value (such as, 0.1 atmospheric pressure, i.e. 0.01 MPa) time, determine that oil occurs described air-conditioning system stifled, carry out detected pressures value in particular by the pressure detecting module being arranged on corresponding position.
Embodiment eight: by detect every the first Preset Time first end that combustible refrigerant flows through the throttling arrangement of air-conditioning system to the second end of throttling arrangement time the system pressure value at the second end place of throttling arrangement, and then when decision-making system force value is less than or equal to preset pressure value, determine that oil occurs described air-conditioning system stifled, carry out detected pressures value in particular by the pressure detecting module being arranged on corresponding position.
Fig. 2 shows the block diagram of the stifled treating apparatus of air-conditioning system according to an embodiment of the invention oil.
As shown in Figure 2, the treating apparatus 200 that air-conditioning system oil according to an embodiment of the invention is stifled, the cold-producing medium that described air-conditioning system uses is combustible refrigerant, described air-conditioning system comprises electric expansion valve, then described device 200 comprises: logging modle 202, control module 204, statistical module 206 and detection module 208.
Wherein, logging modle 202, for when detecting that oily blocking up occurs the described air-conditioning system being in default operating condition, records the current aperture of described electric expansion valve; Control module 204, be adjusted to default aperture for the described current aperture controlled the aperture of described electric expansion valve is recorded by described logging modle 202, described default aperture is greater than described current aperture; Statistical module 206, is operated in accumulated running time under described default aperture for adding up described electric expansion valve; Whether detection module 208, for when the described accumulated running time that described statistical module 206 is added up reaches Preset Time, detect described air-conditioning system and occur oily stifled, to process accordingly according to testing result.
The treating apparatus 200 that the air-conditioning system oil that the embodiment of second aspect present invention provides is stifled, when being detected that by detection module 208 the air-conditioning system generation oil being in the duty that easily generation oil is stifled of use combustible refrigerant blocks up, the oil then needing start treatment strategy to solve air-conditioning system timely and effectively blocks up problem, air-conditioning system is made to recover to run well, and then avoid air-conditioning system to occur the phenomenon that ability decays because oil blocks up, to ensure the service life of compressor and air-conditioning system, improve the comfort of air-conditioning system simultaneously, promote Consumer's Experience, particularly, the stifled problem of oil can be solved by the mode of the operation aperture regulating electric expansion valve, that is: occur when oil blocks up first by the current aperture of logging modle 202 recorded electronic expansion valve, then control the aperture of electric expansion valve to be adjusted to the default aperture being greater than it by current aperture by control module 204, and when the electric expansion valve that statistical module 206 counts on reaches Preset Time according to the accumulated running time of default aperture work, whether again detect air-conditioning system by detection module 208 occurs oily stifled, and and then determine next step processing policy according to testing result.
In addition, the treating apparatus 200 that the air-conditioning system oil in above-described embodiment provided by the invention is stifled, can also have following additional technical feature:
In technique scheme, preferably, also comprise: reminding module 210, for reaching described Preset Time when the described accumulated running time that described statistical module 206 is added up, and described detection module 208 detect described air-conditioning system occur oil stifled time, the off-premises station operation troubles of air-conditioning system described in prompting user also points out described control module 204 to control to close described air-conditioning system; And described control module 204 also for: reach described Preset Time when the described accumulated running time that described statistical module 206 is added up, and described detection module 208 do not detect described air-conditioning system occur oil stifled time, control the aperture of described electric expansion valve to be adjusted to described current aperture by described default aperture.
In this technical scheme, after the electric expansion valve of air-conditioning system works Preset Time under default aperture, when again detecting that oily blocking up occurs air-conditioning system by detection module 208, then can be pointed out the off-premises station operation troubles of user's air-conditioning system in the mode of sound, word and/or bright light by reminding module 210, and point out control module 204 directly to control to close air-conditioning system, make it stop transport, make motor excessive heating to avoid causing because oil is stifled exhaust outlet of compressor exhaust to have some setbacks, and then cause the irremediable loss such as burn-down of electric motor, system crash; And when again detecting that oily blocking up does not occur air-conditioning system by detection module 208, then need to control the aperture of the electric expansion valve of air-conditioning system to be remained in operation by the current aperture presetting aperture and be adjusted to record by control module 204, to extend the service life of product while guaranteeing air-conditioning system normal function.
In above-mentioned arbitrary technical scheme, preferably, the aperture of described electric expansion valve is greater than default aperture.
In this technical scheme, in order to better solve the stifled problem of air-conditioning system oil, compressor lubricant oil and combustible refrigerant is made to recover normal circulation as early as possible in air-conditioning system, and then make air-conditioning system recover to run well, aperture is preferably selected to be greater than the electric expansion valve in default aperture, wherein, default aperture can be 1.8mm.
In above-mentioned arbitrary technical scheme, preferably, the span of described default aperture: 450 step ~ 480 steps.
In this technical scheme, the preferably span presetting aperture is 450 step ~ 480 steps, to solve the stifled problem of air-conditioning system oil as early as possible, make air-conditioning system recover as early as possible to run well, and the air-conditioning system recorded occur oil stifled before the span of current aperture be generally 100 step ~ 400 steps.
In above-mentioned arbitrary technical scheme, preferably, described default operating condition comprises: the duty that the duty that described air-conditioning system defrost starts, described air-conditioning system defrost terminate, described air-conditioning system are in the duty of low-temperature heating and described air-conditioning system and operate in duty lower than default environment temperature; Described combustible refrigerant is R290 cold-producing medium.
In this technical scheme, the default operating condition that air-conditioning system oil easily occurs stifled includes but not limited to: the duty that air-conditioning system defrost starts, the duty that air-conditioning system defrost terminates, air-conditioning system is in start and is in the duty of low-temperature heating and air-conditioning system and operates in duty lower than default environment temperature, wherein, defrost terminates, defrost start and low-temperature heating duty under the air-conditioning system probability that oil occurs stifled reduce successively, generally speaking, when cold-producing medium meets with the system environments of the temperature difference of difference more than 30 DEG C within air-conditioning systems, just there will be oil stifled, and when operating in the environment of subzero less than 15 DEG C, also can block up by oil, subzero 30 DEG C time, oil is stifled certainly, in addition, when air-conditioning system is in frequency conversion, severe, when high operating mode or cryogenic refrigeration, also there is the stifled situation of oil.
And for how judging whether air-conditioning system is in default operating condition, particularly, when the postrun accumulative switching times of cross valve start of air-conditioning system is even-times, then can determine the duty that air-conditioning system is in defrost and terminates, so when accumulative switching times is odd-times, then can determine that air-conditioning system is in defrost and starts or be in the duty in defrost process, and the duty being operated in low-temperature heating can be determined according to start parameters, environment temperature can be detected by the existing temperature sensor of air-conditioning system particularly; In addition, combustible refrigerant is preferably low GWP, does not almost have R290 (i.e. propane) cold-producing medium of any pollution.
Fig. 3 shows the block diagram of air-conditioner according to an embodiment of the invention.
As shown in Figure 3, air-conditioner 300 according to an embodiment of the invention, comprises the treating apparatus that the air-conditioning system oil according to any one of above-mentioned second aspect embodiment blocks up.
The air-conditioner 300 that the embodiment of third aspect present invention provides, because of the treating apparatus 200 that the air-conditioning system oil comprised according to any one of above-mentioned second aspect embodiment blocks up, thus can solve the stifled problem of oil timely and effectively makes air-conditioning system recover to run well, and then avoid air-conditioning system to occur the phenomenon that ability decays because oil blocks up, to ensure the service life of compressor and air-conditioning system, improve the comfort of air-conditioning system simultaneously, promote Consumer's Experience.
More than be described with reference to the accompanying drawings technical scheme of the present invention, can solve the stifled problem of oil timely and effectively makes air-conditioning system recover to run well, and then avoid air-conditioning system to occur the phenomenon that ability decays because oil blocks up, to ensure the service life of compressor and air-conditioning system, improve the comfort of air-conditioning system simultaneously, promote Consumer's Experience, simultaneously also better mate new cooling media provide a kind of reference frame for studying new type compressor lubricating oil from now on.
In the present invention, term " first ", " second " object only for describing, and instruction or hint relative importance can not be interpreted as.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. the processing method that air-conditioning system oil is stifled, is characterized in that, the cold-producing medium that described air-conditioning system uses is combustible refrigerant, and described air-conditioning system comprises electric expansion valve, then described method comprises:
When detecting that oily blocking up occurs the described air-conditioning system being in default operating condition, record the current aperture of described electric expansion valve;
The aperture of described electric expansion valve is adjusted to default aperture by described current aperture, and described default aperture is greater than described current aperture;
Add up described electric expansion valve be operated in described default aperture under accumulated running time;
When described accumulated running time reaches Preset Time, detect described air-conditioning system and whether occur oily stifled, to process accordingly according to testing result.
2. the processing method that air-conditioning system oil according to claim 1 is stifled, it is characterized in that, described when described accumulated running time reaches Preset Time, detect described air-conditioning system and whether occur oily stifled, to process accordingly according to testing result, specifically comprise:
Described Preset Time is reached when described accumulated running time, and when detecting that oily blocking up occurs described air-conditioning system, the off-premises station operation troubles also described air-conditioning system of prompting closedown of air-conditioning system described in prompting user;
Reach described Preset Time when described accumulated running time, and when not detecting that oily blocking up occurs described air-conditioning system, the aperture of described electric expansion valve is adjusted to described current aperture by described default aperture.
3. the processing method that air-conditioning system oil according to claim 1 and 2 is stifled, it is characterized in that, the aperture of described electric expansion valve is greater than default aperture.
4. the processing method that air-conditioning system oil according to claim 1 and 2 is stifled, is characterized in that, the span of described default aperture: 450 step ~ 480 steps.
5. the processing method that air-conditioning system oil according to claim 1 and 2 is stifled, it is characterized in that, described default operating condition comprises: the duty that the duty that described air-conditioning system defrost starts, described air-conditioning system defrost terminate, described air-conditioning system are in the duty of low-temperature heating and described air-conditioning system and operate in duty lower than default environment temperature;
Described combustible refrigerant is R290 cold-producing medium.
6. the treating apparatus that air-conditioning system oil is stifled, is characterized in that, the cold-producing medium that described air-conditioning system uses is combustible refrigerant, and described air-conditioning system comprises electric expansion valve, then described device comprises:
Logging modle, for when detecting that oily blocking up occurs the described air-conditioning system being in default operating condition, records the current aperture of described electric expansion valve;
Control module, for controlling, the aperture of described electric expansion valve is adjusted to default aperture by the described current aperture of described logging modle record, described default aperture is greater than described current aperture;
Statistical module, is operated in accumulated running time under described default aperture for adding up described electric expansion valve;
Whether detection module, for when the described accumulated running time of described statistical module counts reaches Preset Time, detect described air-conditioning system and occur oily stifled, to process accordingly according to testing result.
7. the treating apparatus that air-conditioning system oil according to claim 6 is stifled, is characterized in that, also comprise:
Reminding module, described Preset Time is reached for the described accumulated running time when described statistical module counts, and described detection module detect described air-conditioning system occur oil stifled time, the off-premises station operation troubles of air-conditioning system described in prompting user also points out described control module to control to close described air-conditioning system; And
Described control module also for: reach described Preset Time when the described accumulated running time of described statistical module counts, and described detection module do not detect described air-conditioning system occur oil stifled time, control the aperture of described electric expansion valve to be adjusted to described current aperture by described default aperture.
8. the treating apparatus that the air-conditioning system oil according to claim 6 or 7 is stifled, it is characterized in that, the aperture of described electric expansion valve is greater than default aperture.
9. the treating apparatus that air-conditioning system oil is stifled according to claim 6 or 7, is characterized in that, the span of described default aperture: 450 step ~ 480 steps.
10. the treating apparatus that air-conditioning system oil is stifled according to claim 6 or 7, it is characterized in that, described default operating condition comprises: the duty that the duty that described air-conditioning system defrost starts, described air-conditioning system defrost terminate, described air-conditioning system are in the duty of low-temperature heating and described air-conditioning system and operate in duty lower than default environment temperature;
Described combustible refrigerant is R290 cold-producing medium.
11. 1 kinds of air-conditioners, is characterized in that, comprise the treating apparatus that the air-conditioning system oil according to any one of claim 6 to 10 blocks up.
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