CN105444366A - Oil blockage detecting method and detecting device of air conditioning system and air conditioner - Google Patents
Oil blockage detecting method and detecting device of air conditioning system and air conditioner Download PDFInfo
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- CN105444366A CN105444366A CN201511034120.4A CN201511034120A CN105444366A CN 105444366 A CN105444366 A CN 105444366A CN 201511034120 A CN201511034120 A CN 201511034120A CN 105444366 A CN105444366 A CN 105444366A
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- conditioning system
- air
- force value
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- oil
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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
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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
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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
- F25B49/00—Arrangement or mounting of control or safety devices
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
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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
Abstract
The invention proposes an oil blockage detecting method of an air conditioning system, an oil blockage detecting device of the air conditioning system and an air conditioner, wherein refrigerant used by the air conditioning system is combustible refrigerant; and the method comprises the steps of: judging if the air conditioning system is located in a preset working state; respectively detecting a first system pressure value at a first end and a second system pressure value at a second end of the combustible refrigerant flowing through the first end to the second end of a throttle device of the air conditioning system by every other first preset time when judging the air conditioning system is located in the preset working state; judging if a difference value of the first system pressure value and the second system pressure value is smaller than or equal to a preset pressure value; and determining if the air conditioning system generates oil blockage according to a judging result. The method can timely and effectively determine if the air conditioning system using the combustible refrigerant generates the oil blockage.
Description
Technical field
The present invention relates to air-conditioning technical field, in particular to detection method, the oily stifled checkout gear 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 to determine the using air-conditioning system of combustible refrigerant whether oil occurs timely and effectively stifled, 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 detection method of a kind of air-conditioning system oil.
Another object of the present invention is to propose the stifled checkout gear 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 detection method that a kind of air-conditioning system oil is stifled, the cold-producing medium that described air-conditioning system uses is combustible refrigerant, and described method comprises: judge whether air-conditioning system is in default operating condition; When judging that described air-conditioning system is in described default operating condition, every the first Preset Time detect respectively first end that described combustible refrigerant flows through the throttling arrangement of described air-conditioning system to the second end of described throttling arrangement time the first system force value at described first end place and the second system force value at described second end place; Judge whether the difference of described the first system force value and described second system force value is less than or equal to preset pressure value; Determine whether described air-conditioning system oil occurs according to judged result stifled
The detection method that the air-conditioning system oil that the embodiment of first aspect present invention provides is stifled, when judging that oily stifled default operating condition easily occurs to use the air-conditioning system of combustible refrigerant to be in, then need start detection strategy stifled to determine whether air-conditioning system oil occurs, 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, thus lifting Consumer's Experience, particularly, combustible refrigerant to flow to the throttling arrangement now after the second end the first system force value of first end and the second system force value at the second end place from the first end of the throttling arrangement of air-conditioning system can be detected respectively every the first Preset Time, and and then to determine whether air-conditioning system oil occurs according to the first system force value detected and the difference of second system force value and the magnitude relationship of preset pressure value stifled.
In addition, the detection 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 the first system force value and described second system force value is detected by the second pressure detecting module of the first pressure detecting module and described second end place that are arranged on the described first end place of described throttling arrangement respectively every described first Preset Time.
In this technical scheme, the system pressure value that the first end place of throttling arrangement of the correspondence before and after throttling arrangement and the first pressure detecting module at the second end place and the second pressure detecting module come to detect every the first Preset Time respectively corresponding position is flow through by the combustible refrigerant being arranged on air-conditioning system, wherein, first pressure detecting module and the second pressure detecting module can be preferably pressure sensor, so, the accuracy of temperature value testing result can effectively be improved.
In above-mentioned arbitrary technical scheme, preferably, described every the first Preset Time detect respectively first end that described combustible refrigerant flows through the throttling arrangement of described air-conditioning system to the second end of described throttling arrangement time the first system force value at described first end place and the second system force value at described second end place before, also comprise: add up the cumulative operation time that described air-conditioning system is in described default operating condition; When described cumulative operation time reaches the second Preset Time, detect described the first system force value and described second system force value respectively every described first Preset Time.
In this technical scheme, in order to improve the accuracy of system pressure value testing result further, can work as after cumulative operation time that air-conditioning system runs under default operating condition reaches the second Preset Time, perform again and detect respectively when combustible refrigerant flow to the first system force value at the first end now after the second end and the second end place and the operation of second system force value from the first end of the throttling arrangement of air-conditioning system every the first Preset Time, after the pressure level-off of air-conditioning system, namely carry out the detection of force value again.
In above-mentioned arbitrary technical scheme, preferably, it is described that to determine whether described air-conditioning system oil occurs according to judged result stifled, specifically comprising: when judging that the difference of described the first system force value and described second system force value is less than or equal to described preset pressure value, determining that oil occurs described air-conditioning system stifled.
In this technical scheme, when the difference of the first system force value at first end place and the second system force value at the second end place that throttling arrangement detected every the first Preset Time is less than or equal to preset pressure value, then can determine that oil has occurred air-conditioning system stifled, corresponding processing policy can be taked further to solve the stifled problem of oil, there is because oil blocks up the phenomenon that ability decays to avoid air-conditioning system, ensure the service life of compressor and air-conditioning system, improve the comfort of air-conditioning system simultaneously, thus promote Consumer's Experience.
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; And the difference of described the first system force value and described second system force value is absolute value; 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, difference for the first system force value at the first end place of throttling arrangement and the second system force value at the second end place takes absolute value, with stifled by judging accurately to determine whether air-conditioning system oil occurs with the magnitude relationship of preset temperature value, and 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 checkout gear that a kind of air-conditioning system oil is stifled, the cold-producing medium that described air-conditioning system uses is combustible refrigerant, and described device comprises: judge module, for judging whether air-conditioning system is in default operating condition; First pressure detecting module, for when described judge module judges that described air-conditioning system is in described default operating condition, every the first Preset Time detect first end that described combustible refrigerant flows through the throttling arrangement of described air-conditioning system to the second end of described throttling arrangement time the first system force value at described first end place; Second pressure detecting module, for when described judge module judges that described air-conditioning system is in described default operating condition, every described first Preset Time detect described first end that described combustible refrigerant flows through described throttling arrangement to described second end time the second system force value at described second end place; Described judge module also for: judge whether the difference of the described the first system force value that described first pressure detecting module detects and the described second system force value that described second pressure detecting module detects is less than or equal to preset pressure value; Determination module, stifled for determining according to the judged result of described judge module whether described air-conditioning system oil occurs.
The checkout gear that the air-conditioning system oil that the embodiment of second aspect present invention provides is stifled, when being judged that by judge module oily stifled default operating condition easily occurs to use the air-conditioning system of combustible refrigerant to be in, then need start detection strategy stifled to determine whether air-conditioning system oil occurs, 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, thus lifting Consumer's Experience, particularly, can detect by the first pressure detecting module and the second pressure detecting module combustible refrigerant to flow to the throttling arrangement now after the second end the first system force value of first end and the second system force value at the second end place from the first end of the throttling arrangement of air-conditioning system respectively every the first Preset Time, and and then the first system force value that detects respectively of the first pressure detecting module judged according to judge module by determination module and the second pressure detecting module and the difference of second system force value and the magnitude relationship of preset pressure value to determine whether air-conditioning system oil occurs stifled.
In addition, the checkout gear 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 first pressure detecting module installation is at the described first end place of described throttling arrangement; Described second pressure detecting module installation is at the described second end place of described throttling arrangement.
In this technical scheme, the system pressure value that the first end place of throttling arrangement of the correspondence before and after throttling arrangement and the first pressure detecting module at the second end place and the second pressure detecting module come to detect every the first Preset Time respectively corresponding position is flow through by the combustible refrigerant being arranged on air-conditioning system, wherein, first pressure detecting module and the second pressure detecting module can be preferably pressure sensor, so, the accuracy of temperature value testing result can effectively be improved.
In above-mentioned arbitrary technical scheme, preferably, also comprise: statistical module, for described first pressure detecting module and described second pressure detecting module respectively every described first Preset Time detect first end that described combustible refrigerant flows through the throttling arrangement of described air-conditioning system to the second end of described throttling arrangement time the first system force value at described first end place and the second system force value at described second end place before, add up the cumulative operation time that described air-conditioning system is in described default operating condition; Described first pressure detecting module specifically for: when the described cumulative operation time of described statistical module counts reaches the second Preset Time, detect described the first system force value every described first Preset Time; Described second pressure detecting module specifically for: when the described cumulative operation time of described statistical module counts reaches described second Preset Time, detect described second system force value every described first Preset Time.
In this technical scheme, in order to improve the accuracy of system pressure value testing result further, after the cumulative operation time that the air-conditioning system can working as statistical module counts is run under default operating condition reaches the second Preset Time, perform again and detect when combustible refrigerant flow to the first system force value at the first end now after the second end and the second end place and the operation of second system force value from the first end of the throttling arrangement of air-conditioning system every the first Preset Time respectively by the first pressure detecting module and the second pressure detecting module, namely after the pressure level-off of air-conditioning system, carry out the detection of force value again.
In above-mentioned arbitrary technical scheme, preferably, described determination module specifically for: when described judge module judges that the difference of described the first system force value and described second system force value is less than or equal to described preset pressure value, determine that oil occurs described air-conditioning system stifled.
In this technical scheme, when judging that the first system force value at first end place of the throttling arrangement that the first pressure detecting module and the second pressure detecting module detect respectively and the difference of the second system force value at the second end place are less than or equal to preset pressure value every the first Preset Time by judge module, then can determine that oil has occurred air-conditioning system stifled, corresponding processing policy can be taked further to solve the stifled problem of oil, there is because oil blocks up the phenomenon that ability decays to avoid air-conditioning system, ensure the service life of compressor and air-conditioning system, improve the comfort of air-conditioning system simultaneously, thus lifting Consumer's Experience.
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; And the difference of described the first system force value and described second system force value is absolute value; 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, difference for the first system force value at the first end place of throttling arrangement and the second system force value at the second end place takes absolute value, with stifled by judging accurately to determine whether air-conditioning system oil occurs with the magnitude relationship of preset temperature value, and 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 checkout gear 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 checkout gear that the air-conditioning system oil comprised according to any one of above-mentioned second aspect embodiment blocks up, thus can determine to use the air-conditioning system of combustible refrigerant whether oil occurs timely and effectively stifled, 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 detection method of air-conditioning system according to an embodiment of the invention oil;
Fig. 2 shows the block diagram of the stifled checkout gear 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 detection method of air-conditioning system according to an embodiment of the invention oil.
As shown in Figure 1, the detection 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, and described method comprises: step 102, judges whether air-conditioning system is in default operating condition; Step 104, when judging that described air-conditioning system is in described default operating condition, every the first Preset Time detect respectively first end that described combustible refrigerant flows through the throttling arrangement of described air-conditioning system to the second end of described throttling arrangement time the first system force value at described first end place and the second system force value at described second end place; Step 106, judges whether the difference of described the first system force value and described second system force value is less than or equal to preset pressure value; According to judged result, step 108, determines whether described air-conditioning system oil occurs stifled
The detection method that the air-conditioning system oil that the embodiment of first aspect present invention provides is stifled, when judging that oily stifled default operating condition easily occurs to use the air-conditioning system of combustible refrigerant to be in, then need start detection strategy stifled to determine whether air-conditioning system oil occurs, 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, thus lifting Consumer's Experience, particularly, combustible refrigerant to flow to the throttling arrangement now after the second end the first system force value of first end and the second system force value at the second end place from the first end of the throttling arrangement of air-conditioning system can be detected respectively every the first Preset Time, and and then to determine whether air-conditioning system oil occurs according to the first system force value detected and the difference of second system force value and the magnitude relationship of preset pressure value stifled, wherein, the span of the first Preset Time is 0.5 second ~ 5 seconds, preset pressure value can be taken as 0.1 atmospheric pressure (i.e. 0.01 MPa).
In addition, the detection 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 the first system force value and described second system force value is detected by the second pressure detecting module of the first pressure detecting module and described second end place that are arranged on the described first end place of described throttling arrangement respectively every described first Preset Time.
In this technical scheme, the system pressure value that the first end place of throttling arrangement of the correspondence before and after throttling arrangement and the first pressure detecting module at the second end place and the second pressure detecting module come to detect every the first Preset Time respectively corresponding position is flow through by the combustible refrigerant being arranged on air-conditioning system, wherein, first pressure detecting module and the second pressure detecting module can be preferably pressure sensor, so, the accuracy of temperature value testing result can effectively be improved.
In above-mentioned arbitrary technical scheme, preferably, described every the first Preset Time detect respectively first end that described combustible refrigerant flows through the throttling arrangement of described air-conditioning system to the second end of described throttling arrangement time the first system force value at described first end place and the second system force value at described second end place before, also comprise: add up the cumulative operation time that described air-conditioning system is in described default operating condition; When described cumulative operation time reaches the second Preset Time, detect described the first system force value and described second system force value respectively every described first Preset Time.
In this technical scheme, in order to improve the accuracy of system pressure value testing result further, can work as after cumulative operation time that air-conditioning system runs under default operating condition reaches the second Preset Time, perform again and detect when combustible refrigerant flow to the first system force value at the first end now after the second end and the second end place and the operation of second system force value from the first end of the throttling arrangement of air-conditioning system respectively every the first Preset Time, namely after the pressure level-off of air-conditioning system, carry out the detection of force value again, wherein, second Preset Time preferably span is: 10 minutes ~ 40 minutes.
In above-mentioned arbitrary technical scheme, preferably, described step 108 specifically comprises: when judging that the difference of described the first system force value and described second system force value is less than or equal to described preset pressure value, determines that oil occurs described air-conditioning system stifled.
In this technical scheme, when the difference of the first system force value at first end place and the second system force value at the second end place that throttling arrangement detected every the first Preset Time is less than or equal to preset pressure value, then can determine that oil has occurred air-conditioning system stifled, corresponding processing policy can be taked further to solve the stifled problem of oil, there is because oil blocks up the phenomenon that ability decays to avoid air-conditioning system, ensure the service life of compressor and air-conditioning system, improve the comfort of air-conditioning system simultaneously, thus promote Consumer's Experience.
Particularly can by one of at least solving the stifled problem of oil in the processing policy described in following examples.
Embodiment one: solve the stifled problem of oil by the throttling arrangement using caliber to be more than or equal to default caliber (such as 1.5mm), namely increase the flow of throttling arrangement, wherein, throttling arrangement comprises capillary, choke valve.
Embodiment two: by increasing the aperture of electric expansion valve, namely when detecting that oily blocking up occurs air-conditioning system, electric expansion valve is adjusted to default aperture (being generally 450 step ~ 480 steps) by current aperture, namely the flow of throttling arrangement is increased, and run with this default aperture certain hour (being generally 5 minutes ~ 10 minutes) afterwards and oil stifled Resolving probiems detected time, by electric expansion valve by default aperture regulate back current aperture recover oil stifled before normal operation, otherwise prompt system fault is also shut down, to avoid making air-conditioning system collapse because oil is stifled.
Embodiment three: solve the stifled problem of oil by the mode of the throttling arrangement bypass assembly in parallel for air-conditioning system, wherein, bypass assembly comprises: the bypass pipe be arranged in parallel with throttling arrangement and the stop valve be arranged on bypass pipe, then when detecting that oily blocking up occurs air-conditioning system, opening stop valve closes throttling arrangement, to make cold-producing medium through bypass assembly at air-conditioning system Inner eycle, and after operation certain hour (being generally 5 minutes ~ 10 minutes), reactivate throttling arrangement and close stop valve, and reopening throttling arrangement certain hour (being generally 3 minutes ~ 10 minutes), and when again detecting that system oil is blocked up, prompt system fault is also shut down.
Embodiment four: the mode being throttling arrangement heating by introducing external heat source solves the stifled problem of oil, particularly, at throttling arrangement place, heater is set (such as, anti-explosion heating band), when detecting that oily blocking up occurs air-conditioning system, open heater a period of time (being generally 5 minutes ~ 10 minutes), if the stifled problem of oil is still unresolved, continue heating a period of time (being generally 10 minutes ~ 20 minutes), if still oil is stifled after post bake, then prompt system fault shutting down, if detect in process, oil is stifled solves, closes heater.
Embodiment five: by being that the mode of its heating solves the stifled problem of oil by the heat produced in air-conditioning system course of work transporting to throttling arrangement place, particularly, by air-conditioning system electric-controlled box and throttling arrangement and/or between compressor and throttling arrangement, flow-guiding channel is set respectively, and when detecting that oily blocking up occurs air-conditioning system, at least one flow-guiding channel is made to be in work conducting state, with the heat transporting throttling arrangement place will produced in electric-controlled box and/compressor operation, open heating a period of time (being generally 5 minutes ~ 10 minutes), if the stifled problem of oil is still unresolved, continue heating a period of time (being generally 10 minutes ~ 20 minutes), if still oil is stifled after post bake, then prompt system fault shutting down, if detect in process, oil is stifled solves, closes heater.
Embodiment six: solve the stifled problem of oil by repeating to switch the mode of cross valve according to predetermined period in Preset Time, wherein, Preset Time is within guaranteeing that the experience of user is generally set in 30 minutes, predetermined period preferably can be set to 5 minutes, if in process, when detecting that air-conditioning system oil blocks up Resolving probiems, need the duty before cross valve being returned to oily blocking up, if still detect after Preset Time reaches, oil is stifled, then prompt system fault shutting down.
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; And the difference of described the first system force value and described second system force value is absolute value; 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, difference for the first system force value at the first end place of throttling arrangement and the second system force value at the second end place takes absolute value, with stifled by judging accurately to determine whether air-conditioning system oil occurs with the magnitude relationship of preset temperature value, and combustible refrigerant is preferably low GWP, does not almost have R290 (i.e. propane) cold-producing medium of any pollution.
Fig. 2 shows the block diagram of the stifled checkout gear of air-conditioning system according to an embodiment of the invention oil.
As described in Figure 2, the checkout gear 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, and described device 200 comprises: judge module 202, first pressure detecting module 204, second pressure detecting module 206 and determination module 208.
Wherein, judge module 202, for judging whether air-conditioning system is in default operating condition; First pressure detecting module 204, for when described judge module 202 judges that described air-conditioning system is in described default operating condition, every the first Preset Time detect first end that described combustible refrigerant flows through the throttling arrangement of described air-conditioning system to the second end of described throttling arrangement time the first system force value at described first end place; Second pressure detecting module 206, for when described judge module 202 judges that described air-conditioning system is in described default operating condition, every described first Preset Time detect described first end that described combustible refrigerant flows through described throttling arrangement to described second end time the second system force value at described second end place; Described judge module 202 also for: judge whether the difference of the described the first system force value that described first pressure detecting module 204 detects and the described second system force value that described second pressure detecting module 206 detects is less than or equal to preset pressure value; Determination module 208, stifled for determining according to the judged result of described judge module 202 whether described air-conditioning system oil occurs.
The checkout gear 200 that the air-conditioning system oil that the embodiment of second aspect present invention provides is stifled, when being judged that by judge module 202 oily stifled default operating condition easily occurs to use the air-conditioning system of combustible refrigerant to be in, then need start detection strategy stifled to determine whether air-conditioning system oil occurs, 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, thus lifting Consumer's Experience, particularly, can detect by the first pressure detecting module 204 and the second pressure detecting module 206 combustible refrigerant to flow to the throttling arrangement now after the second end the first system force value of first end and the second system force value at the second end place from the first end of the throttling arrangement of air-conditioning system respectively every the first Preset Time, and and then the first system force value that detects respectively of the first pressure detecting module 204 judged according to judge module 202 by determination module 208 and the second pressure detecting module 206 and the difference of second system force value and the magnitude relationship of preset pressure value to determine whether air-conditioning system oil occurs stifled.
In addition, the checkout gear 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, described first pressure detecting module 204 is arranged on the described first end place of described throttling arrangement; Described second pressure detecting module 206 is arranged on the described second end place of described throttling arrangement.
In this technical scheme, corresponding position is detected at the first end place of throttling arrangement of the correspondence before and after throttling arrangement and the first pressure detecting module 204 at the second end place and the second pressure detecting module 206 respectively system pressure value every the first Preset Time is flow through by the combustible refrigerant being arranged on air-conditioning system, wherein, first pressure detecting module 204 and the second pressure detecting module 206 can be preferably pressure sensor, so, the accuracy of temperature value testing result can effectively be improved.
In above-mentioned arbitrary technical scheme, preferably, also comprise: statistical module 210, for described first pressure detecting module 204 and described second pressure detecting module 206 respectively every described first Preset Time detect first end that described combustible refrigerant flows through the throttling arrangement of described air-conditioning system to the second end of described throttling arrangement time the first system force value at described first end place and the second system force value at described second end place before, add up the cumulative operation time that described air-conditioning system is in described default operating condition; Described first pressure detecting module 204 specifically for: when the described cumulative operation time that described statistical module 210 is added up reaches the second Preset Time, detect described the first system force value every described first Preset Time; Described second pressure detecting module 206 specifically for: when the described cumulative operation time that described statistical module 210 is added up reaches described second Preset Time, detect described second system force value every described first Preset Time.
In this technical scheme, in order to improve the accuracy of system pressure value testing result further, after the cumulative operation time that the air-conditioning system can working as statistical module 210 statistics is run under default operating condition reaches the second Preset Time, perform again and detect when combustible refrigerant flow to the first system force value at the first end now after the second end and the second end place and the operation of second system force value from the first end of the throttling arrangement of air-conditioning system every the first Preset Time respectively by the first pressure detecting module 204 and the second pressure detecting module 206, namely after the pressure level-off of air-conditioning system, carry out the detection of force value again.
In above-mentioned arbitrary technical scheme, preferably, described determination module 208 specifically for: when described judge module 202 judges that the difference of described the first system force value and described second system force value is less than or equal to described preset pressure value, determine that oil occurs described air-conditioning system stifled.
In this technical scheme, when judging that the first system force value at first end place of the throttling arrangement that the first pressure detecting module 204 and the second pressure detecting module 206 detect respectively and the difference of the second system force value at the second end place are less than or equal to preset pressure value every the first Preset Time by judge module 202, then can determine that oil has occurred air-conditioning system stifled, corresponding processing policy can be taked further to solve the stifled problem of oil, there is because oil blocks up the phenomenon that ability decays to avoid air-conditioning system, ensure the service life of compressor and air-conditioning system, improve the comfort of air-conditioning system simultaneously, thus lifting Consumer's Experience.
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; And the difference of described the first system force value and described second system force value is absolute value; 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, difference for the first system force value at the first end place of throttling arrangement and the second system force value at the second end place takes absolute value, with stifled by judging accurately to determine whether air-conditioning system oil occurs with the magnitude relationship of preset temperature value, and 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 checkout gear 200 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 checkout gear 200 that the air-conditioning system oil comprised according to any one of above-mentioned second aspect embodiment blocks up, thus can determine to use the air-conditioning system of combustible refrigerant whether oil occurs timely and effectively stifled, 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 determine to use the air-conditioning system of combustible refrigerant whether oil occurs timely and effectively stifled, 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 detection 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 method comprises:
Judge whether air-conditioning system is in default operating condition;
When judging that described air-conditioning system is in described default operating condition, every the first Preset Time detect respectively first end that described combustible refrigerant flows through the throttling arrangement of described air-conditioning system to the second end of described throttling arrangement time the first system force value at described first end place and the second system force value at described second end place;
Judge whether the difference of described the first system force value and described second system force value is less than or equal to preset pressure value;
Determine whether described air-conditioning system oil occurs according to judged result stifled.
2. the detection method that air-conditioning system oil according to claim 1 is stifled, it is characterized in that, detect described the first system force value and described second system force value by the second pressure detecting module of the first pressure detecting module and described second end place that are arranged on the described first end place of described throttling arrangement respectively every described first Preset Time.
3. the detection method that air-conditioning system oil according to claim 1 is stifled, it is characterized in that, described every the first Preset Time detect respectively first end that described combustible refrigerant flows through the throttling arrangement of described air-conditioning system to the second end of described throttling arrangement time the first system force value at described first end place and the second system force value at described second end place before, also comprise:
Add up the cumulative operation time that described air-conditioning system is in described default operating condition;
When described cumulative operation time reaches the second Preset Time, detect described the first system force value and described second system force value respectively every described first Preset Time.
4. the detection method that air-conditioning system oil according to any one of claim 1 to 3 is stifled, it is characterized in that, it is described that to determine whether described air-conditioning system oil occurs according to judged result stifled, specifically comprising: when judging that the difference of described the first system force value and described second system force value is less than or equal to described preset pressure value, determining that oil occurs described air-conditioning system stifled.
5. the detection method that air-conditioning system oil according to any one of claim 1 to 3 is stifled, 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; And
The difference of described the first system force value and described second system force value is absolute value;
Described combustible refrigerant is R290 cold-producing medium.
6. the checkout gear 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 device comprises:
Judge module, for judging whether air-conditioning system is in default operating condition;
First pressure detecting module, for when described judge module judges that described air-conditioning system is in described default operating condition, every the first Preset Time detect first end that described combustible refrigerant flows through the throttling arrangement of described air-conditioning system to the second end of described throttling arrangement time the first system force value at described first end place;
Second pressure detecting module, for when described judge module judges that described air-conditioning system is in described default operating condition, every described first Preset Time detect described first end that described combustible refrigerant flows through described throttling arrangement to described second end time the second system force value at described second end place;
Described judge module also for: judge whether the difference of the described the first system force value that described first pressure detecting module detects and the described second system force value that described second pressure detecting module detects is less than or equal to preset pressure value;
Determination module, stifled for determining according to the judged result of described judge module whether described air-conditioning system oil occurs.
7. the checkout gear that air-conditioning system oil according to claim 6 is stifled, is characterized in that,
Described first pressure detecting module installation is at the described first end place of described throttling arrangement;
Described second pressure detecting module installation is at the described second end place of described throttling arrangement.
8. the checkout gear that air-conditioning system oil according to claim 6 is stifled, is characterized in that, also comprise:
Statistical module, for described first pressure detecting module and described second pressure detecting module respectively every described first Preset Time detect first end that described combustible refrigerant flows through the throttling arrangement of described air-conditioning system to the second end of described throttling arrangement time the first system force value at described first end place and the second system force value at described second end place before, add up the cumulative operation time that described air-conditioning system is in described default operating condition;
Described first pressure detecting module specifically for: when the described cumulative operation time of described statistical module counts reaches the second Preset Time, detect described the first system force value every described first Preset Time;
Described second pressure detecting module specifically for: when the described cumulative operation time of described statistical module counts reaches described second Preset Time, detect described second system force value every described first Preset Time.
9. the checkout gear that the air-conditioning system oil according to any one of claim 6 to 8 is stifled, is characterized in that, described determination module specifically for:
When described judge module judges that the difference of described the first system force value and described second system force value is less than or equal to described preset pressure value, determine that oil occurs described air-conditioning system stifled.
10. the checkout gear that the air-conditioning system oil according to any one of claim 6 to 8 is stifled, 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; And
The difference of described the first system force value and described second system force value is absolute value;
Described combustible refrigerant is R290 cold-producing medium.
11. 1 kinds of air-conditioners, is characterized in that, comprise the checkout gear that the air-conditioning system oil according to any one of claim 6 to 10 blocks up.
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