CN105509251B - Air-conditioning system oil stifled detection method and detection device, air conditioner - Google Patents
Air-conditioning system oil stifled detection method and detection device, air conditioner Download PDFInfo
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- CN105509251B CN105509251B CN201511034788.9A CN201511034788A CN105509251B CN 105509251 B CN105509251 B CN 105509251B CN 201511034788 A CN201511034788 A CN 201511034788A CN 105509251 B CN105509251 B CN 105509251B
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- conditioning system
- stifled
- oil
- pressure value
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Classifications
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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
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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
- F24F11/62—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
-
- 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
- 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
-
- 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
Abstract
Detection method, a kind of stifled detection device of air-conditioning system oil and a kind of air conditioner blocked up the invention proposes a kind of air-conditioning system oil, wherein the refrigerant that the air-conditioning system uses is combustible refrigerant, the method includes：Judge whether the air-conditioning system is in default operating condition；System pressure value when determining that the air-conditioning system is in the default operating condition, at the second end of throttling set when after the first end to the second end of the throttling set that the first preset time detects the throttling set that the combustible refrigerant flows through the air-conditioning system；Judge whether the system pressure value is less than or equal to preset pressure value；It is stifled to determine whether the air-conditioning system occurs oil according to judging result.The technical solution can timely and effectively determine block up using whether the air-conditioning system of combustible refrigerant occurs oil, and then air-conditioning system is avoided the phenomenon that ability decaying occur because oil is stifled, to guarantee the service life of compressor and air-conditioning system.
Description
Technical field
The present invention relates to air-conditioning technical field, the detection methods blocked up in particular to a kind of air-conditioning system oil, Yi Zhongkong
The stifled detection device of adjusting system oil and a kind of air conditioner.
Background technique
Currently, substituting R22 refrigerant using R410a refrigerant mostly, advantage is bright in technical field of air conditioner refrigeration
It is aobvious to be embodied on convertible frequency air-conditioner, but due to the GWP of R410a refrigerant (Global Warming Potential, global warming
Latent energy value) it is higher, it is got worse in Present Global greenhouse effects, the background of global climate transition pay attention to day by day is coped in countries in the world
Under, it will gradually eliminated.Therefore, more absorbed research at present is freezed using R32 refrigerant, R290 refrigerant as the low GWP of representative
Agent, especially for this refrigerant for almost not having any pollution of R290 refrigerant, meanwhile, the research and development of corresponding compressor also exist
In progress, the especially lubricating oil research and development of new type compressor are paid more and more attention.
Lubricating oil in cooler compressor be to the normal operation of system it is extremely important, lubricating oil play to cylinder and
Rotor lubrication, sealing and the effect of cooling.When compressor runs well, lubricating oil sucks gas from compression motor spindle by crankshaft
Cylinder enters system with the refrigerant of high temperature and pressure after overcompression, later as refrigerant circulation turns again to compressor bottom
Portion, while the heat that compressor electric motor and cylinder generate can also be taken away by refrigerant and lubricating oil.If led for some reason
The problems such as causing oil return return-air unsmooth, will result in compressor lubrication shortage of oil, motor idle running fever, will further will lead to compression
Between machine cylinder and rotor abrasion increase, internal temperature it is excessively high, eventually lead to motor burn, system crash.So being designed in system
When, it has to guarantee that lubricating oil can normally return to compressor and motor heat is timely discharged.
However, its viscosity can sharply increase at low temperature, especially cold for combustible refrigerant-R290 refrigerant
Super low temperature refrigeration agent and lubricating oil in warm frequency changer, when defrosting terminates four-way valve commutation, in evaporator (indoor heat exchanger)
It needs to enter condenser (outdoor heat exchanger) by throttling set (for example, electric expansion valve), while combustible refrigerant is because of peace
Full property considers that charging amount is less, therefore the pressure of the pressure ratio R410a refrigerant of air-conditioning system, the air-conditioning system of R32 refrigerant
It is much smaller, to will cause the bigger oil blocking throttling set of viscosity, cause combustible refrigerant that can not participate in recycling, in turn
Compressor is set to dally, ability and operation power decline, system oil starvation lack fluorine, and the motor of compressor is excessively sent out after long time running
Heat greatly reduces the service life of compressor and system, influences the use feeling of user, while the appearance of this problem is also
Design causes very big influence using the air-conditioning system of combustible refrigerant.
Therefore, how timely and effectively to determine blocking up using whether the air-conditioning system of combustible refrigerant occurs oil, and then keep away
Exempt from air-conditioning system and the phenomenon that ability decaying occur because oil is stifled, to guarantee the service life of compressor and air-conditioning system, improves simultaneously
The comfort of air-conditioning system becomes technical problem urgently to be resolved.
Summary of the invention
The present invention is directed to solve at least one of the technical problems existing in the prior art or related technologies.
For this purpose, an object of the present invention is to provide the detection methods that a kind of air-conditioning system oil blocks up.
It is another object of the present invention to propose a kind of detection device that air-conditioning system oil is stifled.
Yet another object of the invention is that proposing a kind of air conditioner.
To realize that at least one above-mentioned purpose proposes a kind of air-conditioning system according to the embodiment of the first aspect of the invention
The stifled detection method of system oil, the refrigerant that the air-conditioning system uses are combustible refrigerant, the method includes：Described in judgement
Whether air-conditioning system is in default operating condition；When determining that the air-conditioning system is in the default operating condition, Mei Ge
First end to the throttling that one preset time detects the throttling set that the combustible refrigerant flows through the air-conditioning system fills
System pressure value at the second end of throttling set when after the second end set；Judge whether the system pressure value is less than
Or it is equal to preset pressure value；It is stifled to determine whether the air-conditioning system occurs oil according to judging result.
The stifled detection method of the air-conditioning system oil that the embodiment of first aspect present invention provides, when judgement uses flammable system
When the air-conditioning system of cryogen is in easily generation oil stifled default operating condition, then need to start inspection policies to determine air-conditioning system
It is stifled that oil whether occurs, and then air-conditioning system is avoided the phenomenon that ability decaying occur because oil is stifled, to guarantee compressor and air-conditioning system
Service life, while improving the comfort of air-conditioning system, specifically, can be every first to promote user experience
Preset time detect combustible refrigerant from the first end of the throttling set of air-conditioning system flow to second end after throttling at this time
System pressure value at the second end of device, and in turn according to the size relation of the system pressure value and preset pressure value detected
To determine it is stifled whether air-conditioning system occurs oil.
In addition, the detection method that the air-conditioning system oil in above-described embodiment provided by the invention blocks up, can also have following
Additional technical feature：
In the above-mentioned technical solutions, it is preferable that the pressure detecting mould at second end by the way that the throttling set is arranged in
Block detects the system pressure value every first preset time.
In the technical scheme, the second end after flowing through throttling set by the way that the combustible refrigerant of air-conditioning system is arranged in
The pressure detecting module (for example, pressure sensor) at place is detected the system pressure of corresponding position every the first preset time
Value, in this way, the accuracy of system pressure value testing result can be effectively improved.
In any of the above-described technical solution, it is preferable that described every the first preset time detection flammable refrigeration
Agent flows through the throttling set after the first end to the second end of the throttling set of the throttling set of the air-conditioning system
Before system pressure value at second end, further include：Count the accumulative work that the air-conditioning system is in the default operating condition
Make the time；When the cumulative operation time reaches the second preset time, the system is detected every first preset time
Pressure value.
In the technical scheme, in order to further increase the accuracy of system pressure value testing result, air-conditioning system can be worked as
After the cumulative operation time run under default operating condition of uniting reaches the second preset time, then execute every the first preset time
Detection combustible refrigerant flows through the operation of the system pressure value at the second end after the throttling set of air-conditioning system, i.e., in air-conditioning
The detection of system pressure value is carried out after the pressure level-off of system again.
In any of the above-described technical solution, it is preferable that described to determine whether the air-conditioning system occurs according to judging result
Oil is stifled, specifically includes：When determining that the system pressure value is less than or equal to the preset pressure value, the air-conditioning system is determined
It is stifled that oil occurs.
In the technical scheme, when the combustible refrigerant detected every the first preset time flows through the section of air-conditioning system
When the system pressure value at second end after flowing device is less than or equal to preset pressure value, then it can determine that air-conditioning system has occurred
Oil is stifled, and corresponding processing strategie may further be taken to solve the problems, such as that oil is stifled, ability occurs because oil is stifled to avoid air-conditioning system and declines
The phenomenon that subtracting, guarantees the service life of compressor and air-conditioning system, while improving the comfort of air-conditioning system, to be promoted
User experience.
In any of the above-described technical solution, it is preferable that the default operating condition includes：The air-conditioning system defrost starts
Working condition, the air-conditioning system defrost working condition, the air-conditioning system that terminate be in the working condition of low-temperature heating
And the air-conditioning system operates in the working condition lower than default environment temperature；The combustible refrigerant is R290 refrigeration
Agent.
In the technical scheme, air-conditioning system easily occurs the stifled default operating condition of oil and includes but is not limited to：Air-conditioning system
Working condition that working condition that defrost starts, air-conditioning system defrost terminate, air-conditioning system are in booting in low-temperature heating
Working condition and air-conditioning system operate in the working condition lower than default environment temperature, wherein defrost terminates, defrost start with
And the probability that air-conditioning system occurs that oil blocks up under the working condition of low-temperature heating successively reduces, to sum up, when refrigerant is in air-conditioning
When meeting with the system environments of the temperature difference of 30 DEG C of difference or more in system, it is stifled just to will appear oil, and operating in subzero 15 DEG C
When environment below, also can oil it is stifled, at subzero 30 DEG C, oil is stifled certainly, in addition, when air-conditioning system be in frequency conversion, badly, it is high
When operating condition or cryogenic refrigeration, there is also the stifled situations of oil.
And for how to judge whether air-conditioning system is in default operating condition, specifically, when the four-way valve of air-conditioning system
When the postrun accumulative switching times that are switched on are even-times, then it can determine that air-conditioning system is in the working condition that defrost terminates, that
When accumulative switching times are odd-times, then it can determine that air-conditioning system is in defrost and starts or be in work during defrost
Make state, and the working condition to work in low-temperature heating can be determined according to booting setting parameter, specifically environment temperature can be with
Pass through the existing temperature sensor detection of air-conditioning system；In addition, combustible refrigerant is preferably low GWP, does not almost have any dirt
R290 (i.e. propane) refrigerant of dye.
Embodiment according to the second aspect of the invention proposes a kind of detection device that air-conditioning system oil is stifled, the sky
The refrigerant that adjusting system uses is combustible refrigerant, and described device includes：Judgment module, for judging that the air-conditioning system is
It is no to be in default operating condition；Pressure detecting module, for determining that the air-conditioning system is in described pre- in the judgment module
If when working condition, detecting the throttling set that the combustible refrigerant flows through the air-conditioning system every the first preset time
System pressure value at the second end of throttling set when after first end to the second end of the throttling set；The judgement
Module is also used to：Whether the system pressure value for judging that the pressure detecting module detects is less than or equal to preset pressure
Value；Determining module, it is stifled for determining whether the air-conditioning system occurs oil according to the judging result of the judgment module.
The stifled detection device of the air-conditioning system oil that the embodiment of second aspect of the present invention provides, when judgment module determines to use
When the air-conditioning system of combustible refrigerant is in easily generation oil stifled default operating condition, then need to start inspection policies to determine
It is stifled whether air-conditioning system occurs oil, and then air-conditioning system is avoided the phenomenon that ability decaying occur because oil is stifled, with guarantee compressor and
The service life of air-conditioning system, while improving the comfort of air-conditioning system specifically, can be with to promote user experience
First end of the combustible refrigerant from the throttling set of air-conditioning system is detected by pressure detecting module every the first preset time
System pressure value at the second end of throttling set at this time after flowing to second end, and in turn by determining module according to judgement
The size relation of system pressure value and preset pressure value that the pressure detecting module that module determines detects determines air-conditioning system
It is stifled whether oil is occurred.
In addition, the detection device that the air-conditioning system oil in above-described embodiment provided by the invention blocks up, can also have following
Additional technical feature：
In the above-mentioned technical solutions, it is preferable that the pressure detecting module is arranged at the second end of the throttling set.
In the technical scheme, the second end after flowing through throttling set by the way that the combustible refrigerant of air-conditioning system is arranged in
The pressure detecting module (for example, pressure sensor) at place is detected the system pressure of corresponding position every the first preset time
Value, in this way, the accuracy of system pressure value testing result can be effectively improved.
In any of the above-described technical solution, it is preferable that further include：Statistical module, for every in the pressure detecting module
Every first preset time detect the combustible refrigerant flow through the air-conditioning system throttling set first end to institute
Before system pressure value at the second end of the throttling set after stating the second end of throttling set, the air-conditioning system is counted
Cumulative operation time in the default operating condition；The pressure detecting module is specifically used for：When the statistical module is united
When the cumulative operation time of meter reaches the second preset time, the system pressure is detected every first preset time
Value.
It in the technical scheme, can be when statistics mould in order to further increase the accuracy of system pressure value testing result
After the cumulative operation time that the air-conditioning system of block statistics is run under default operating condition reaches the second preset time, then pass through pressure
Power detection module executes second after the first preset time detection combustible refrigerant flows through the throttling set of air-conditioning system
The operation of system pressure value at end carries out the detection of system pressure value again after the pressure level-off of air-conditioning system.
In any of the above-described technical solution, it is preferable that the determining module is specifically used for：When the judgment module determines institute
When stating system pressure value less than or equal to the preset pressure value, it is stifled to determine that oil occurs for the air-conditioning system.
In the technical scheme, when determining that pressure detecting module detects by judgment module every the first preset time
Combustible refrigerant flows through the system pressure value at the second end after the throttling set of air-conditioning system and is less than or equal to preset pressure
When value, then it can determine that air-conditioning system has occurred oil and blocked up by determining module, corresponding processing strategie solution may further be taken
There is the phenomenon that ability decaying because oil is stifled to avoid air-conditioning system, guarantees the use of compressor and air-conditioning system in the certainly stifled problem of oil
Service life, while the comfort of air-conditioning system is improved, to promote user experience.
In any of the above-described technical solution, it is preferable that the default operating condition includes：The air-conditioning system defrost starts
Working condition, the air-conditioning system defrost working condition, the air-conditioning system that terminate be in the working condition of low-temperature heating
And the air-conditioning system operates in the working condition lower than default environment temperature；The combustible refrigerant is R290 refrigeration
Agent.
In the technical scheme, air-conditioning system easily occurs the stifled default operating condition of oil and includes but is not limited to：Air-conditioning system
Working condition that working condition that defrost starts, air-conditioning system defrost terminate, air-conditioning system are in booting in low-temperature heating
Working condition and air-conditioning system operate in the working condition lower than default environment temperature, wherein defrost terminates, defrost start with
And the probability that air-conditioning system occurs that oil blocks up under the working condition of low-temperature heating successively reduces, to sum up, when refrigerant is in air-conditioning
When meeting with the system environments of the temperature difference of 30 DEG C of difference or more in system, it is stifled just to will appear oil, and operating in subzero 15 DEG C
When environment below, also can oil it is stifled, at subzero 30 DEG C, oil is stifled certainly, in addition, when air-conditioning system be in frequency conversion, badly, it is high
When operating condition or cryogenic refrigeration, there is also the stifled situations of oil.
And for how to judge whether air-conditioning system is in default operating condition, specifically, determine when by judgment module
When the postrun accumulative switching times of four-way valve booting of air-conditioning system are even-times, then it can determine that air-conditioning system is in defrost knot
The working condition of beam, then then can determine at air-conditioning system when determining accumulative switching times for odd-times by judgment module
Working condition during defrost starts or be in defrost, and work can pass through judgement in the working condition of low-temperature heating
Module determines that specifically environment temperature can be passed by judgment module by the existing temperature of air-conditioning system according to booting setting parameter
The testing result of sensor determines；In addition, combustible refrigerant is preferably low GWP, the R290 (i.e. third for almost not having any pollution
Alkane) refrigerant.
Embodiment according to the third aspect of the invention we proposes a kind of air conditioner, including above-mentioned second aspect embodiment
Any one of described in the stifled detection device of air-conditioning system oil.
The air conditioner that the embodiment of third aspect present invention provides, because including any one of above-mentioned second aspect embodiment institute
The stifled detection device of the air-conditioning system oil stated, thus can timely and effectively determine that the air-conditioning system for using combustible refrigerant is
No generation oil is stifled, and then air-conditioning system is avoided the phenomenon that ability decaying occur because oil is stifled, to guarantee compressor and air-conditioning system
Service life, while the comfort of air-conditioning system is improved, promote user experience.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, wherein：
Fig. 1 shows the flow diagram of the stifled detection method of air-conditioning system oil according to an embodiment of the invention；
Fig. 2 shows the block diagrams for the detection device that air-conditioning system oil according to an embodiment of the invention blocks up；
Fig. 3 shows the block diagram of air conditioner according to an embodiment of the invention.
Specific embodiment
To better understand the objects, features and advantages of the present invention, with reference to the accompanying drawing and specific real
Applying mode, the present invention is further described in detail.It should be noted that in the absence of conflict, the implementation of the application
Feature in example and embodiment can be combined with each other.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, the present invention may be used also
To be implemented using other than the one described here other modes, therefore, protection scope of the present invention is not by described below
Specific embodiment limitation.
Fig. 1 shows the flow diagram of the stifled detection method of air-conditioning system oil according to an embodiment of the invention.
As shown in Figure 1, the detection method that air-conditioning system oil according to an embodiment of the invention is stifled, the air-conditioning system
The refrigerant used is combustible refrigerant, the method includes：Judge whether the air-conditioning system is in default operating condition；
When determining that the air-conditioning system is in the default operating condition, the combustible refrigerant is detected every the first preset time
Throttling set when flowing through after the first end to the second end of the throttling set of the throttling set of the air-conditioning system
System pressure value at second end；Judge whether the system pressure value is less than or equal to preset pressure value；According to judging result
It is stifled to determine whether the air-conditioning system occurs oil.
The stifled detection method of the air-conditioning system oil that the embodiment of first aspect present invention provides, when judgement uses flammable system
When the air-conditioning system of cryogen is in easily generation oil stifled default operating condition, then need to start inspection policies to determine air-conditioning system
It is stifled that oil whether occurs, and then air-conditioning system is avoided the phenomenon that ability decaying occur because oil is stifled, to guarantee compressor and air-conditioning system
Service life, while improving the comfort of air-conditioning system, specifically, can be every first to promote user experience
Preset time detect combustible refrigerant from the first end of the throttling set of air-conditioning system flow to second end after throttling at this time
System pressure value at the second end of device, and in turn according to the size relation of the system pressure value and preset pressure value detected
To determine it is stifled whether air-conditioning system occurs oil, wherein the value range of the first preset time is 0.5 second~5 seconds, preset pressure value
It can be taken as 0.1 atmospheric pressure (i.e. 0.01 megapascal).
In addition, the detection method that the air-conditioning system oil in above-described embodiment provided by the invention blocks up, can also have following
Additional technical feature：
In the above-mentioned technical solutions, it is preferable that the pressure detecting mould at second end by the way that the throttling set is arranged in
Block detects the system pressure value every first preset time.
In the technical scheme, the second end after flowing through throttling set by the way that the combustible refrigerant of air-conditioning system is arranged in
The pressure detecting module (for example, pressure sensor) at place is detected the system pressure of corresponding position every the first preset time
Value, in this way, the accuracy of system pressure value testing result can be effectively improved.
In any of the above-described technical solution, it is preferable that described every the first preset time detection flammable refrigeration
Agent flows through the throttling set after the first end to the second end of the throttling set of the throttling set of the air-conditioning system
Before system pressure value at second end, further include：Count the accumulative work that the air-conditioning system is in the default operating condition
Make the time；When the cumulative operation time reaches the second preset time, the system is detected every first preset time
Pressure value.
In the technical scheme, in order to further increase the accuracy of system pressure value testing result, air-conditioning system can be worked as
After the cumulative operation time run under default operating condition of uniting reaches the second preset time, then execute every the first preset time
Detection combustible refrigerant flows through the operation of the system pressure value at the second end after the throttling set of air-conditioning system, i.e., in air-conditioning
The detection of system pressure value is carried out after the pressure level-off of system again, wherein the second preset time preferably value range is：
10 minutes~40 minutes.
In any of the above-described technical solution, it is preferable that the step 108 specifically includes：When the judgement system pressure value
When less than or equal to the preset pressure value, it is stifled to determine that oil occurs for the air-conditioning system.
In the technical scheme, when the combustible refrigerant detected every the first preset time flows through the section of air-conditioning system
When the system pressure value at second end after flowing device is less than or equal to preset pressure value, then it can determine that air-conditioning system has occurred
Oil is stifled, and corresponding processing strategie may further be taken to solve the problems, such as that oil is stifled, ability occurs because oil is stifled to avoid air-conditioning system and declines
The phenomenon that subtracting, guarantees the service life of compressor and air-conditioning system, while improving the comfort of air-conditioning system, to be promoted
User experience.
It can specifically solve the problems, such as that oil is stifled by least one of processing strategie described in following embodiment.
Embodiment one：The throttling set of default caliber (such as 1.5mm) is greater than or equal to by using caliber to solve oil
Stifled problem increases the flow of throttling set, wherein throttling set includes capillary, throttle valve.
Embodiment two：It, will by the aperture of increase electric expansion valve, that is, when detecting that air-conditioning system occurs oily stifled
Electric expansion valve increases the flow of throttling set by current aperture regulation to default aperture (generally 450 steps~480 steps),
It, will and when presetting aperture operation certain time (generally 5 minutes~10 minutes) with this afterwards and detecting that oil blocks up Resolving probiems
Electric expansion valve by preset aperture regulation return current aperture restore oil it is stifled before normal operation, otherwise prompt system failure and close
Machine collapses air-conditioning system to avoid because oil is stifled.
Embodiment three：Solve the problems, such as that oil is stifled by way of the throttling set parallel connection bypass component for air-conditioning system,
In, bypass component includes：The bypass pipe being arranged in parallel with throttling set and the shut-off valve being set on bypass pipe are then detecting
When occurring oily stifled to air-conditioning system, opening stop valve closes throttling set, so that refrigerant is through bypass component in air-conditioning system
Circulation, and reactivate throttling set after running certain time (generally 5 minutes~10 minutes) and close shut-off valve, and
When reopening throttling set certain time (generally 3 minutes~10 minutes), and detecting that system oil is blocked up again, prompt system
Failure is simultaneously shut down.
Example IV：It solves the problems, such as that oil is stifled by way of introducing external heat source and being throttling set heating, specifically, is saving
It flows and heating device (for example, anti-explosion heating band) is set at device, when detecting that air-conditioning system occurs oily stifled, open heating device
(generally 5 minutes~10 minutes) for a period of time continue (generally 10 points of heating a period of time if the stifled problem of oil is still unresolved
Clock~20 minute), if still oil is stifled after reheating, prompt system failure is simultaneously shut down, and has been solved if detecting that oil is stifled in the process
Certainly then close heating device.
Embodiment five：By being its heating at the heat transporting to throttling set that will be generated in the air-conditioning system course of work
Mode solves the problems, such as that oil is stifled, specifically, is filled by the electric-controlled box in air-conditioning system with throttling set and/or compressor and throttling
Flow-guiding channel is respectively set between setting, and when detecting that air-conditioning system occurs oily stifled, at least one flow-guiding channel is made to be in work
Make on state, at the heat transporting throttling set generated in electric-controlled box and/compressor operation, opens one section of heating
Time (generally 5 minutes~10 minutes), continue heating a period of time if the stifled problem of oil is still unresolved (generally 10 minutes~
20 minutes), if still oil is stifled after reheating, prompt system failure is simultaneously shut down, if detecting that oil is stifled in the process and having solved
Close heating device.
Embodiment six：Oily block up is solved by way of repeating switching four-way valve according to predetermined period within a preset time to ask
Topic, wherein preset time is to ensure that the usage experience of user was generally set within 30 minutes, and predetermined period can preferably be set
It is set to 5 minutes, if in the process, when detecting that air-conditioning system oil blocks up Resolving probiems, needing to restore four-way valve the work to oil before stifled
Make state, if preset time still detects that oil is stifled after reaching, prompt system failure is simultaneously shut down.
In any of the above-described technical solution, it is preferable that the default operating condition includes：The air-conditioning system defrost starts
Working condition, the air-conditioning system defrost working condition, the air-conditioning system that terminate be in the working condition of low-temperature heating
And the air-conditioning system operates in the working condition lower than default environment temperature；The combustible refrigerant is R290 refrigeration
Agent.
In the technical scheme, air-conditioning system easily occurs the stifled default operating condition of oil and includes but is not limited to：Air-conditioning system
Working condition that working condition that defrost starts, air-conditioning system defrost terminate, air-conditioning system are in booting in low-temperature heating
Working condition and air-conditioning system operate in the working condition lower than default environment temperature (for example, -15 DEG C), wherein defrost knot
Beam, defrost start and the working condition of low-temperature heating under air-conditioning system the stifled probability of oil occur successively reduce, to sum up, working as
When refrigerant meets with the system environments of the temperature difference of 30 DEG C of difference or more within air-conditioning systems, it is stifled just to will appear oil, and transporting
Row, also can be oily stifled in subzero 15 DEG C of environment below, and at subzero 30 DEG C, oil is stifled certainly, becomes in addition, working as air-conditioning system and being in
Frequently, badly, high operating condition or when cryogenic refrigeration, there is also the stifled situations of oil.
And for how to judge whether air-conditioning system is in default operating condition, specifically, when the four-way valve of air-conditioning system
When the postrun accumulative switching times that are switched on are even-times, then it can determine that air-conditioning system is in the working condition that defrost terminates, that
When accumulative switching times are odd-times, then it can determine that air-conditioning system is in defrost and starts or be in work during defrost
Make state, and the working condition to work in low-temperature heating can be determined according to booting setting parameter, specifically environment temperature can be with
Pass through the existing temperature sensor detection of air-conditioning system；In addition, combustible refrigerant is preferably low GWP, does not almost have any dirt
R290 (i.e. propane) refrigerant of dye.
Fig. 2 shows the block diagrams for the detection device that air-conditioning system oil according to an embodiment of the invention blocks up.
As shown in Fig. 2, the detection device 200 that air-conditioning system oil according to an embodiment of the invention is stifled, the air-conditioning
The refrigerant that system uses is combustible refrigerant, and described device 200 includes：Judgment module 202,204 and of pressure detecting module
Determining module 206.
Wherein, judgment module 202, for judging whether the air-conditioning system is in default operating condition；Pressure detecting mould
Block 204, it is pre- every first for when the judgment module 202 determines that the air-conditioning system is in the default operating condition
If the time detect the combustible refrigerant flow through the air-conditioning system throttling set first end to the throttling set
System pressure value at the second end of throttling set when after second end；The judgment module 202 is also used to：Described in judgement
Whether the system pressure value that pressure detecting module 204 detects is less than or equal to preset pressure value；Determining module 206 is used
It is stifled in determining whether the air-conditioning system occurs oil according to the judging result of the judgment module 202.
The stifled detection device 200 of the air-conditioning system oil that the embodiment of second aspect of the present invention provides, when judgment module 202 is sentenced
When being in the stifled default operating condition of easily generation oil using the air-conditioning system of combustible refrigerant surely, then need to start inspection policies
It is blocked up to determine whether air-conditioning system occurs oil, and then air-conditioning system is avoided the phenomenon that ability decaying occur because oil is stifled, to guarantee to press
The service life of contracting machine and air-conditioning system, while the comfort of air-conditioning system is improved, to promote user experience, specifically
Ground can detect combustible refrigerant by pressure detecting module 204 every the first preset time and fill from the throttling of air-conditioning system
The first end set flow to the system pressure value at the second end of the throttling set at this time after second end, and in turn by determining mould
The size of system pressure value and preset pressure value that block 206 is detected according to the pressure detecting module 204 that judgment module 202 determines
Relationship is blocked up to determine whether air-conditioning system occurs oil.
In addition, the detection device 200 that air-conditioning system oil in above-described embodiment provided by the invention is stifled, can also have with
Lower additional technical feature：
In the above-mentioned technical solutions, it is preferable that the second end of the throttling set is arranged in the pressure detecting module 204
Place.
In the technical scheme, the second end after flowing through throttling set by the way that the combustible refrigerant of air-conditioning system is arranged in
The pressure detecting module 204 (for example, pressure sensor) at place is detected the system pressure of corresponding position every the first preset time
Force value, in this way, the accuracy of system pressure value testing result can be effectively improved.
In any of the above-described technical solution, it is preferable that further include：Statistical module 208, in the pressure detecting module
204 detect the first end that the combustible refrigerant flows through the throttling set of the air-conditioning system every first preset time
Before system pressure value at the second end of the throttling set after to the second end of the throttling set, the air-conditioning is counted
System is in the cumulative operation time of the default operating condition；The pressure detecting module 204 is specifically used for：When the statistics
When the cumulative operation time that module 208 counts reaches the second preset time, described in first preset time detection
System pressure value.
It in the technical scheme, can be when statistics mould in order to further increase the accuracy of system pressure value testing result
After the cumulative operation time that the air-conditioning system that block 208 counts is run under default operating condition reaches the second preset time, then lead to
Excess pressure detection module 204 executes after the first preset time detection combustible refrigerant flows through the throttling set of air-conditioning system
Second end at system pressure value operation, i.e., carry out the inspection of system pressure value again after the pressure level-off of air-conditioning system
It surveys.
In any of the above-described technical solution, it is preferable that the determining module 206 is specifically used for：When the judgment module 202
When determining that the system pressure value is less than or equal to the preset pressure value, it is stifled to determine that oil occurs for the air-conditioning system.
In the technical scheme, it is examined when every the first preset time by the judgement pressure detecting module 204 of judgment module 202
The combustible refrigerant measured flow through the system pressure value at the second end after the throttling set of air-conditioning system be less than or equal to it is pre-
If when pressure value, then can determine that air-conditioning system has occurred oil and blocked up by determining module 206, corresponding place may further be taken
Reason strategy solves the problems, such as that oil is stifled, the phenomenon that ability decaying occurs because oil is stifled to avoid air-conditioning system, guarantees compressor and air-conditioning system
The service life of system, while the comfort of air-conditioning system is improved, to promote user experience.
In any of the above-described technical solution, it is preferable that the default operating condition includes：The air-conditioning system defrost starts
Working condition, the air-conditioning system defrost working condition, the air-conditioning system that terminate be in the working condition of low-temperature heating
And the air-conditioning system operates in the working condition lower than default environment temperature；The combustible refrigerant is R290 refrigeration
Agent.
In the technical scheme, air-conditioning system easily occurs the stifled default operating condition of oil and includes but is not limited to：Air-conditioning system
Working condition that working condition that defrost starts, air-conditioning system defrost terminate, air-conditioning system are in booting in low-temperature heating
Working condition and air-conditioning system operate in the working condition lower than default environment temperature, wherein defrost terminates, defrost start with
And the probability that air-conditioning system occurs that oil blocks up under the working condition of low-temperature heating successively reduces, to sum up, when refrigerant is in air-conditioning
When meeting with the system environments of the temperature difference of 30 DEG C of difference or more in system, it is stifled just to will appear oil, and operating in subzero 15 DEG C
When environment below, also can oil it is stifled, at subzero 30 DEG C, oil is stifled certainly, in addition, when air-conditioning system be in frequency conversion, badly, it is high
When operating condition or cryogenic refrigeration, there is also the stifled situations of oil.
And for how to judge whether air-conditioning system is in default operating condition, specifically, sentence when by judgment module 202
When the postrun accumulative switching times of four-way valve booting for determining air-conditioning system are even-times, then it can determine that air-conditioning system is in defrost
The working condition of end, then then can determine air-conditioning system when determining accumulative switching times for odd-times by judgment module 202
System starts or is in the working condition during defrost in defrost, and work can pass through in the working condition of low-temperature heating
Judgment module 202 determines that specifically environment temperature can pass through air-conditioning system by judgment module 202 according to booting setting parameter
The testing result of some temperature sensors determines；In addition, combustible refrigerant is preferably low GWP, does not almost have any pollution
R290 (i.e. propane) refrigerant.
Fig. 3 shows the block diagram of air conditioner according to an embodiment of the invention.
As shown in figure 3, in air conditioner 300 according to an embodiment of the invention, including above-mentioned second aspect embodiment
The stifled detection device 200 of described in any item air-conditioning system oil.
The air conditioner 300 that the embodiment of third aspect present invention provides, because including any in above-mentioned second aspect embodiment
The detection device 200 that air-conditioning system oil described in blocks up, thus can timely and effectively determine the sky using combustible refrigerant
It is stifled whether adjusting system occurs oil, and then air-conditioning system is avoided the phenomenon that ability decaying occur because oil is stifled, to guarantee compressor and sky
The service life of adjusting system, while the comfort of air-conditioning system is improved, promote user experience.
The technical scheme of the present invention has been explained in detail above with reference to the attached drawings, can timely and effectively determine using flammable system
It is stifled whether the air-conditioning system of cryogen occurs oil, and then air-conditioning system is avoided the phenomenon that ability decaying occur because oil is stifled, to guarantee to press
The service life of contracting machine and air-conditioning system, while the comfort of air-conditioning system is improved, user experience is promoted, while being also the present
Research new type compressor lubricating oil preferably matches new cooling media and provides a kind of reference frame afterwards.
In the present invention, term " first ", " second " are only used for the purpose described, are not understood to indicate or imply phase
To importance.For the ordinary skill in the art, it can understand as the case may be above-mentioned term in the present invention
Concrete meaning.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of stifled detection method of air-conditioning system oil, which is characterized in that the refrigerant that the air-conditioning system uses is combustibility
Refrigerant, the method includes：
Judge whether the air-conditioning system is in default operating condition；
When determining that the air-conditioning system is in the default operating condition, every the first preset time detection flammable system
Throttling dress when cryogen flows through after the first end to the second end of the throttling set of the throttling set of the air-conditioning system
The system pressure value at second end set；
Judge whether the system pressure value is less than or equal to preset pressure value；
It is stifled to determine whether the air-conditioning system occurs oil according to judging result；
In detect every the first preset time that the combustible refrigerant flows through the throttling set of the air-conditioning system
Before system pressure value at the second end of the throttling set behind one end to the second end of the throttling set, further include：
Count the cumulative operation time that the air-conditioning system is in the default operating condition；
When the cumulative operation time reaches the second preset time, the system pressure is detected every first preset time
Value.
2. the stifled detection method of air-conditioning system oil according to claim 1, which is characterized in that by being arranged in the throttling
Pressure detecting module at the second end of device detects the system pressure value every first preset time.
3. the stifled detection method of air-conditioning system oil according to claim 1 or 2, which is characterized in that described to be tied according to judgement
Fruit determines whether the air-conditioning system occurs oil and block up, and specifically includes：When the judgement system pressure value is less than or equal to described pre-
If when pressure value, it is stifled to determine that oil occurs for the air-conditioning system.
4. the stifled detection method of air-conditioning system oil according to claim 1 or 2, which is characterized in that
The default operating condition includes：Working condition that the air-conditioning system defrost starts, the air-conditioning system defrost terminate
Working condition, the air-conditioning system is in the working condition of low-temperature heating and the air-conditioning system is operated in lower than default ring
The working condition of border temperature；
The combustible refrigerant is R290 refrigerant.
5. a kind of stifled detection device of air-conditioning system oil, which is characterized in that the refrigerant that the air-conditioning system uses is combustibility
Refrigerant, described device include：
Judgment module, for judging whether the air-conditioning system is in default operating condition；
Pressure detecting module is used for when the judgment module determines that the air-conditioning system is in the default operating condition, often
Every the first preset time detect the combustible refrigerant flow through the air-conditioning system throttling set first end to the section
System pressure value at the second end of throttling set when after the second end of stream device；
The judgment module is also used to：Whether the system pressure value for judging that the pressure detecting module detects is less than or waits
In preset pressure value；
Determining module, it is stifled for determining whether the air-conditioning system occurs oil according to the judging result of the judgment module；
Further include：
Statistical module, for detecting the combustible refrigerant stream every first preset time in the pressure detecting module
Second of the throttling set after the first end of the throttling set of the air-conditioning system to the second end of the throttling set
Before system pressure value at end, the cumulative operation time that the air-conditioning system is in the default operating condition is counted；
The pressure detecting module is specifically used for：It is preset when the cumulative operation time of the statistical module counts reaches second
When the time, the system pressure value is detected every first preset time.
6. the stifled detection device of air-conditioning system oil according to claim 5, which is characterized in that the pressure detecting module is set
It sets at the second end of the throttling set.
7. the stifled detection device of air-conditioning system oil according to claim 5 or 6, which is characterized in that the determining module tool
Body is used for：
When the judgment module determines that the system pressure value is less than or equal to the preset pressure value, the air-conditioning system is determined
It is stifled that oil occurs for system.
8. the stifled detection device of air-conditioning system oil according to claim 5 or 6, which is characterized in that
The default operating condition includes：Working condition that the air-conditioning system defrost starts, the air-conditioning system defrost terminate
Working condition, the air-conditioning system is in the working condition of low-temperature heating and the air-conditioning system is operated in lower than default ring
The working condition of border temperature；
The combustible refrigerant is R290 refrigerant.
9. a kind of air conditioner, which is characterized in that including the stifled inspection of the air-conditioning system oil as described in any one of claim 5 to 8
Survey device.
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| CN201511034788.9A CN105509251B (en) | 2015-12-31 | 2015-12-31 | Air-conditioning system oil stifled detection method and detection device, air conditioner |
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