CN100451473C - Air conditioner with refrigerant lack fault detection function and fault detection method - Google Patents
Air conditioner with refrigerant lack fault detection function and fault detection method Download PDFInfo
- Publication number
- CN100451473C CN100451473C CNB2006101226871A CN200610122687A CN100451473C CN 100451473 C CN100451473 C CN 100451473C CN B2006101226871 A CNB2006101226871 A CN B2006101226871A CN 200610122687 A CN200610122687 A CN 200610122687A CN 100451473 C CN100451473 C CN 100451473C
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- air conditioner
- temperature sensor
- refrigerant
- fault detection
- heat exchanger
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- 238000001514 detection method Methods 0.000 title claims abstract description 20
- 239000003507 refrigerant Substances 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 15
- 238000004378 air conditioning Methods 0.000 claims description 14
- 230000008569 process Effects 0.000 claims description 9
- 238000005057 refrigeration Methods 0.000 claims description 6
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 abstract description 8
- 238000003745 diagnosis Methods 0.000 abstract description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000002405 diagnostic procedure Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The present invention relates to an air conditioner and a fault diagnosis method for an air conditioner, and more particularly, to an air conditioner having a refrigerant lack fault detection function and a method for detecting a refrigerant lack fault in the air conditioner. An air conditioner with a refrigerant lack fault detection function comprises a compressor, an outdoor heat exchanger, a throttling element, an indoor heat exchanger, a central processing unit and a refrigerant lack fault detection mechanism, wherein the refrigerant lack fault detection mechanism comprises a pipe temperature sensor, an environment temperature sensor and a comparison unit, the pipe temperature sensor is located in the middle of a refrigerant pipeline of the indoor heat exchanger, the environment temperature sensor is located on the windward side of the indoor heat exchanger, and the comparison unit is connected to the central processing unit. The air conditioner can judge the lack of the refrigerant or the system blockage only by simply detecting the indoor temperature and the pipeline temperature, does not need to detect the current, is irrelevant to the specification of the used compressor, and has simple, practical and reliable method.
Description
Technical field
The present invention relates to a kind of air-conditioner and a kind of air conditioner fault diagnostic method, particularly a kind of have cold-producing medium and lack the air-conditioner of fault detection capability and the detection method that the air-conditioning inner refrigerant lacks fault.
Background technology
It is the air-conditioner common faults that cold-producing medium leaks, and it not only can make flow system flow reduce reduction changes in temperature effect, but also can produce harm greatly to the reliability of system.When fault takes place, compressor electric motor can not fully be cooled off, not only can reduce the insulating properties and the reliability of motor, shorten electrical machinery life, also can reduce the greasy property of lubricating oil, even cause the carbonization and the acidolysis of lubricating oil, also might cause the thermal decomposition of cold-producing medium, this a series of problem might cause that all compressor copper facing, wearing and tearing strengthen, the card cylinder, wearing and tearing strengthen the inducement that the metal fillings that produces more becomes system jams and short circuit in winding, even generation burning machine problem, the vicious circle of initiating system.At present, what the cold-producing medium leak diagnostics pattern of air-conditioner generally adopted is that the method that detects compressor exhaust temperature and compressor current is simultaneously judged, also there is direct detection manifold pressure to judge whether that cold-producing medium leaks in addition, but the testing circuit complexity of these two kinds of methods, cost are also high relatively.
Summary of the invention
Technical problem to be solved by this invention is, provide a kind of can the convenient and swift detection air-conditioner whether cold-producing medium lacks and a kind of cold-producing medium lack fault detection method.
Technical problem to be solved by this invention is achieved by the following technical solution: a kind of have an air-conditioner that cold-producing medium lacks fault detection capability, it comprises compressor, outdoor heat exchanger, restricting element, indoor heat exchanger, CPU and cold-producing medium lack fault detect mechanism, this cold-producing medium lacks fault detect mechanism and comprises the warm temperature sensor of a pipe, one environment temperature sensor and a comparing unit, this manages the refrigerant tubing middle part that warm temperature sensor is positioned at indoor heat exchanger, this environment temperature sensor is positioned at the indoor heat exchanger windward side, and this comparing unit is connected in CPU.
The present invention also provides a kind of air conditioner refrigerant to lack the detection method of fault, and it comprises the steps:
A. judge whether operational mode is refrigeration mode, if enter step b, if otherwise stop deterministic process;
B. check that whether the pipe temperature temperature sensor at the refrigerant tubing middle part that is positioned at indoor heat exchanger opens a way or short circuit with the environment temperature sensor that is positioned at the indoor heat exchanger windward side, if then stop deterministic process, enters step c if not;
C. by managing warm temperature sensor detect the 0th minute environment temperature TA before the compressor operation just, by manage warm temperature sensor detect the 0th minute just before the compressor operation pipe temperature TB0 and operation of air conditioner from the 3rd minute to the 5th minute the arbitrary instantaneous pipe temperature TB1 in during this period of time, if satisfy TB0 〉=T
A+ 10 ℃ or satisfy T
B0≤ T
A-10 ℃ then stop deterministic process, no judged result; Otherwise enter steps d;
D. further compare T by comparing unit
B0And T
AIf, T
A＜T
B0＜T
A+ 10 ℃, enter step e, if T
A-10 ℃＜T
B0＜T
A, then enter step f;
E. disregard T
B0Measured value, and make T
B0=T
A, judge T
B0-T
B1Whether set up for≤3 ℃, if set up then this air-conditioning has cold-producing medium to lack fault, otherwise normal;
F. judge T
B0-T
B1Whether set up for≤3 ℃, if set up then this air-conditioning has cold-producing medium to lack fault, otherwise normal.
Because the present invention only just can judge that by the easy detection of indoor temperature and pipeline temperature cold-producing medium lacks or system jams, need not to detect electric current, irrelevant with the specification of used compressor, method is simple and practical reliable.
Description of drawings
Fig. 1 lacks the air-conditioner structural scheme of mechanism of measuring ability for tool cold-producing medium of the present invention;
Fig. 2 lacks the flow chart of detection method for cold-producing medium of the present invention.
The specific embodiment
Referring to Fig. 1, a kind of tool cold-producing medium lacks or the air-conditioner of system jams diagnostic function, it comprises compressor 1, outdoor heat exchanger 2, expansion valve 3, indoor heat exchanger 4, CPU 5 and cold-producing medium lack fault detect mechanism 6, this cold-producing medium lacks fault detect mechanism 6 and comprises the warm temperature sensor 61 of pipe, environment temperature sensor 62 and comparing unit 63, this manages the refrigerant tubing middle part that warm temperature sensor 61 is positioned at indoor heat exchanger 4 when freezing, this environment temperature sensor 62 is positioned at indoor heat exchanger 4 windward sides, and this comparing unit 62 is connected in CPU 5.
Referring to Fig. 2, a kind of air conditioner refrigerant lacks fault detection method, and it comprises the steps:
A. judge whether operational mode is refrigeration mode, if enter step b, if otherwise stop deterministic process; This step is mainly used in the judgement operational mode, have only refrigeration mode to be only and be suitable for using detection method of the present invention, and when operational mode was not refrigeration mode, the judged result error was with apparent in view.
B. whether access tube temperature temperature sensor and environment temperature sensor open a way or short circuit, if then stop deterministic process, enter step c if not; This step mainly is that the cold-producing medium of judging air-conditioner lacks fault detect mechanism 6 fault is arranged, if any sensor cisco unity malfunction just can't carry out follow-up judgement.
C. by managing warm temperature sensor detect the 0th minute pipe temperature T before the compressor operation just
B0With operation of air conditioner 3-5 minute in certain manage warm T in a flash
B1If satisfy T
B0〉=T
A+ 10 ℃ or satisfy T
B0≤ T
A-10 ℃ then stop deterministic process, no judged result; Otherwise enter steps d; This step is judged the original tube temperature whether within reasonable range, promptly should be at 10 ℃ with the difference of environment temperature, otherwise judged result also will have very mistake.
D. further compare T by comparing unit
B0And T
AIf, T
A＜T
B0＜T
A+ 10 ℃, enter step e, if T
A-10 ℃＜T
B0＜T
A, then enter step f;
E. disregard T
B0Measured value, and make T
B0=T
A, judge T
B0-T
B1Whether set up for≤3 ℃, if set up then this air-conditioning has cold-producing medium to lack fault, otherwise normal; When original tube temperature during, as original tube temperature value, judge through air-conditioning pipe temperature T after 3-5 minute the operation with ambient temperature value greater than environment temperature
B1Than environment temperature T
AWhether decline surpasses 3 ℃, if then air-conditioning is normal, otherwise the decidable air-conditioning refrigerant lacks.
F. judge T
B0-T
B1Whether set up for≤3 ℃, if set up then this air-conditioning has cold-producing medium to lack fault, otherwise normal; The situation of this step is that the original tube temperature is lower than environment temperature, and its reason may be that air-conditioning has just been closed and do not waited so long, and directly judges through air-conditioning pipe temperature T after 3-5 minute the operation in this case
B1Than original tube temperature T
B0Whether decline surpasses 3 ℃, if then air-conditioning is normal, otherwise the decidable air-conditioning refrigerant lacks.
The cold-producing medium of air-conditioner of the present invention lacks or the system jams diagnosis principle is such:
Under the refrigeration system normal operation condition, in preceding 5 minutes of system's entry into service, the variations in temperature of cold-producing medium clearly, after lacking as cold-producing medium, flow system flow reduces, the pipe temperature changes very little, even constant.According to original ambient temperature T
AWith original tube temperature T
B0Magnitude relationship determine whether to judge simultaneously to T
B0Revise,, detect the instantaneous value of any time Guan Wen in the 3rd, 4,5 minute from the 3rd minute of the continuous running of compressor, and and T
B0Compare, as satisfy T
B0-T
B1Take the corresponding protection measure again for≤3 ℃, all kinds of faults of the air-conditioner that just can avoid system refrigerant to lack effectively causing take place.
The present invention also has some other distortion or improvement, be positioned at other position of refrigerant tubing of indoor heat exchanger as aforementioned tube temperature temperature sensor, or the acquisition time of managing warm instantaneous value is not the 3rd, 4,5 minute etc., the restricting element among the present invention can be capillary also can be expansion valve etc. other play the element of throttling action.If those skilled in the art are subjected to the change or the improvement of the conspicuous unsubstantiality that inspiration of the present invention makes, all belong to the protection domain of claims of the present invention.
Claims (1)
1, a kind of air conditioner refrigerant lacks the detection method of fault, it is characterized in that, it comprises the steps:
A. judge whether operational mode is refrigeration mode, if enter step b, if otherwise stop deterministic process;
B. check that whether the pipe temperature temperature sensor at the refrigerant tubing middle part that is positioned at indoor heat exchanger opens a way or short circuit with the environment temperature sensor that is positioned at the indoor heat exchanger windward side, if then stop deterministic process, enters step c if not;
C. by managing warm temperature sensor detect the 0th minute environment temperature TA before the compressor operation just, by manage warm temperature sensor detect the 0th minute just the pipe temperature TB0 before the compressor operation and operation of air conditioner from the 3rd minute to the 5th minute the arbitrary instantaneous pipe temperature TB1 in during this period of time, if satisfy TB0 〉=TA+10 ℃ or satisfy TB0≤TA-10 ℃ then stop deterministic process; Otherwise enter steps d;
D. further compare T by comparing unit
B0And T
AIf, T
A＜T
B0＜T
A+ 10 ℃, enter step e, if T
A-10 ℃＜T
B0＜T
A, then enter step f;
E. disregard T
B0Measured value, and make T
B0=T
A, judge T
B0-T
B1Whether set up for≤3 ℃, if set up then this air-conditioning has cold-producing medium to lack fault, otherwise normal;
F. judge T
B0-T
B1Whether set up for≤3 ℃, if set up then this air-conditioning has cold-producing medium to lack fault, otherwise normal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101226871A CN100451473C (en) | 2006-10-12 | 2006-10-12 | Air conditioner with refrigerant lack fault detection function and fault detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101226871A CN100451473C (en) | 2006-10-12 | 2006-10-12 | Air conditioner with refrigerant lack fault detection function and fault detection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1928448A CN1928448A (en) | 2007-03-14 |
| CN100451473C true CN100451473C (en) | 2009-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101226871A Expired - Fee Related CN100451473C (en) | 2006-10-12 | 2006-10-12 | Air conditioner with refrigerant lack fault detection function and fault detection method |
Country Status (1)
| Country | Link |
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Cited By (1)
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|---|---|---|---|---|
| CN106123205A (en) * | 2016-06-17 | 2016-11-16 | 美的集团武汉制冷设备有限公司 | Moveable air conditioner and coolant leakage detection method thereof |
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| CN101566517B (en) * | 2009-05-26 | 2010-11-17 | 宁波奥克斯电气有限公司 | Method for judging refrigerant leakage of air-conditioner |
| CN103375874B (en) * | 2012-04-23 | 2016-03-02 | 珠海格力电器股份有限公司 | Air conditioner and refrigerant circulation abnormity protection control method of air conditioner |
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| KR102206199B1 (en) | 2012-07-03 | 2021-01-25 | 삼성전자주식회사 | Diagnosis method of air conditioner |
| CN103134142B (en) * | 2013-02-27 | 2015-05-20 | 四川长虹空调有限公司 | Method for detecting complete blockage of air conditioning system |
| CN104566771A (en) * | 2013-10-23 | 2015-04-29 | 珠海格力电器股份有限公司 | Refrigerant control method and device of dehumidifier |
| CN103557578B (en) * | 2013-11-04 | 2016-02-03 | 宁波奥克斯电气股份有限公司 | Air-cooled modular cold and hot water unit lacks the guard method of fluorine |
| CN104677551A (en) * | 2013-11-26 | 2015-06-03 | 美的集团股份有限公司 | Refrigerant leakage detection method for air conditioning system |
| CN104677550B (en) * | 2013-11-26 | 2018-02-02 | 美的集团股份有限公司 | The leakage of refrigerant detection method of air-conditioning system |
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| CN108397876A (en) * | 2018-02-27 | 2018-08-14 | 珠海格力电器股份有限公司 | Method and device for detecting air conditioner refrigerant state |
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| CN106123205B (en) * | 2016-06-17 | 2019-07-30 | 美的集团武汉制冷设备有限公司 | Moveable air conditioner and its coolant leakage detection method |
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