CN107560101B - A kind of fault detection method of air conditioner electronic expansion valve - Google Patents

A kind of fault detection method of air conditioner electronic expansion valve Download PDF

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CN107560101B
CN107560101B CN201710684170.XA CN201710684170A CN107560101B CN 107560101 B CN107560101 B CN 107560101B CN 201710684170 A CN201710684170 A CN 201710684170A CN 107560101 B CN107560101 B CN 107560101B
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expansion valve
temperature
compressor
preset
fault detection
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CN107560101A (en
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蒋建军
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Ningbo Aux Electric Co Ltd
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Ningbo Aux Electric Co Ltd
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Abstract

The present invention relates to a kind of fault detection methods of air conditioner electronic expansion valve, by carrying out the detection of low tension switch before compressor start, refrigerant situation thus can know that, when low tension switch disconnects, air-conditioning does not start and reports failure, the erroneous judgement for avoiding cold medium shortage from may cause;Simultaneously as whether low tension switch disconnects and compressor exhaust temperature is fixed value, is not influenced by environment temperature, therefore, can more accurately judge electric expansion valve fault condition as judgment basis by using low tension switch and compressor exhaust temperature.

Description

A kind of fault detection method of air conditioner electronic expansion valve
Technical field
The present invention relates to field of air conditioning, and in particular to a kind of fault detection method of air conditioner electronic expansion valve.
Background technique
Air conditioner has become the essential of people's household, can by air-conditioning when especially outdoor temperature is higher or lower So that interior is maintained at comfortable temperature, the outdoor unit of existing air-conditioning uses electric expansion valve to replace capillary to refrigerant Pipeline carries out control of shutting off, so that it is guaranteed that air-conditioning is under different outdoor environments, it can efficient operation.But it is used at present When electric expansion valve carries out aperture adjustment according to the control of the main control chip of air-conditioning, due to controller circuitry or electric expansion valve valve The self reason of body, it is possible that actually there is no movements for electric expansion valve, and main control chip can not be found at this time, air-conditioning Electric expansion valve is controlled still according to original control method, the operation exception of entire air conditioner is will lead to, imitates Fruit difference or protection are shut down.
In order to solve the above-mentioned technical problem, as (application publication number is Patent No. CN201410752855.X CN104482638A Chinese invention patent application " fault detection method of air conditioner and its electric expansion valve "), failure inspection Survey method includes that the current aperture increase for controlling electric expansion valve, which is preset, opens when detecting electric expansion valve fault detection instruction Degree;Obtain the current exhaust gas temperature of compressor;Calculate the exhaust temperature of compressor when detecting electric expansion valve fault detection instruction The temperature difference of degree and the compressor exhaust temperature after the default aperture of current aperture increase of electric expansion valve;When the temperature difference is default When outside the temperature difference range, electric expansion valve failure is determined, although by the method achieve the automatic detection to electronic valve failure, It is, when air-conditioner coolant deficiency, when the temperature difference showed after electronic expansion valve opening variation is with electric expansion valve failure The temperature difference at institute's performance is consistent, judges by accident to will lead to, and mistake maintenance.
Therefore, it is necessary to the fault detection methods to existing electric expansion valve to be improved further.
Summary of the invention
The technical problem to be solved by the invention for the present situation of prior art is to provide one kind can be to electric expansion valve Make the fault detection method of the air conditioner electronic expansion valve of accurate judgement.
The technical scheme of the invention to solve the technical problem is: a kind of fault detection of air conditioner electronic expansion valve Method, the air-conditioning include compressor, condenser and evaporator, are equipped with low tension switch at the air entry of the compressor, It is characterized by: the fault detection method includes following steps:
S1: air-conditioning booting, and low tension switch is detected;
S2: if low tension switch disconnects, do not start compressor, compressor emergency shutdown simultaneously reports low voltage failure;Otherwise, step is executed S3;
S3: starting compressor, and detect the temperature T of compressor return air pipeh, the temperature T of evaporator coilzAnd condenser Coil temperature Tl, and perform the next step;
S4: detecting the runing time t of compressor, and with the first preset time t1It is compared;If t > t1, execute step Otherwise S5 returns to step S3;
S5: whether detection air-conditioning is in refrigeration mode, if in refrigeration mode, executes step S6, otherwise, in heating mould Formula simultaneously executes step S8;
S6: the temperature T of compressor return air pipe is detectedhWith the temperature T of evaporator coilzDifference DELTA T1=Th-Tz
S7: by Δ T1Respectively with the first preset temperature T1With the second preset temperature T2It is compared, and the detection duration is It is no to reach the second preset time t2If Δ T1> T2Or Δ T1< T1And duration t2, S10 is thened follow the steps, otherwise, electronics is swollen Swollen valve is normal, and executes step S14;
S8: the temperature T of compressor return air pipe is detectedhWith the temperature T of condenser coillDifference DELTA T2=Th-Tl
S9: by Δ T2Respectively with third preset temperature T3With the 4th preset temperature T4It is compared, and the detection duration is It is no to reach third preset time t3If Δ T2> T4Or Δ T2< T3And duration t3, S10 is thened follow the steps, otherwise, electronics is swollen Swollen valve is normal, and executes step S14;
S10: the aperture of electric expansion valve is reduced into S, and in the 4th preset time t4The delivery temperature of interior detection compressor Tp, while the case where detect low tension switch, and execute step S11;
S11: by TpWith the 5th preset temperature T5It is compared, if Tp≥T5Or low tension switch disconnects, and thens follow the steps S12, It is no to then follow the steps S13;
S12: electric expansion valve is normal, electric expansion valve is restored to initial preceding aperture, and execute step S14;
S13: electric expansion valve failure shows fault code, and executes step S14;
S14: electric expansion valve fault verification terminates.
Preferably, the first preset time t in step s 41≥6min。
Preferably, the first preset temperature T in the step s 71It is 2 DEG C, the second preset temperature T2Be 4 DEG C, second it is default when Between t2For 10s.
Preferably, third preset temperature T in step s 93It is 0 DEG C, the 4th preset temperature T4It is 2 DEG C, when third is preset Between t3For 10s.
Preferably, in step slo, S is 600 steps;In step s 11, the 5th preset temperature T5It is 125 DEG C, the 4th is pre- If time t4≤5min。
Further preferably, the 4th preset time t4For 5min.
Further preferably, the first preset time t1For 6min.
Compared with the prior art, the advantages of the present invention are as follows: the detection by carrying out low tension switch before compressor start, It thus can know that refrigerant situation, when low tension switch disconnects, air-conditioning does not start and report failure, and cold medium shortage is avoided to may cause Erroneous judgement;Simultaneously as whether low tension switch disconnects and compressor exhaust temperature is fixed value, not by the shadow of environment temperature It rings, therefore, can more accurately judge that electronics is swollen as judgment basis by using low tension switch and compressor exhaust temperature Swollen valve fault condition, control method are more reasonable and practical.
Detailed description of the invention
Fig. 1 is the flow chart of the fault detection method of air conditioner electronic expansion valve in the embodiment of the present invention.
Specific embodiment
The present invention will be described in further detail below with reference to the embodiments of the drawings.
As shown in Figure 1, the preferred embodiment of the fault detection method for air conditioner electronic expansion valve of the present invention.The air-conditioning includes There are compressor, condenser and evaporator, is equipped with low tension switch, the failure of the air conditioner electronic expansion valve at the air entry of compressor Detection method includes following steps:
S1: air-conditioning booting, and low tension switch is detected;
S2: if low tension switch disconnects, do not start compressor, compressor emergency shutdown simultaneously reports low voltage failure;Otherwise, step is executed S3;
S3: starting compressor, electric expansion valve is opened, and detects the temperature T of compressor return air pipeh, the temperature of evaporator coil Spend TzAnd condenser coil temperature Tl, and perform the next step;
S4: detecting the runing time t of compressor, and with the first preset time t1It is compared, t1Value is 6min;If t > 6min executes step S5 and otherwise returns to step S3;
S5: whether detection air-conditioning is in refrigeration mode, if in refrigeration mode, executes step S6, otherwise, in heating mould Formula simultaneously executes step S8;
S6: the temperature T of compressor return air pipe is detectedhWith the temperature T of evaporator coilzDifference DELTA T1=Th-Tz
S7: by Δ T1Respectively with the first preset temperature T1With the second preset temperature T2It is compared, and the detection duration is It is no to reach the second preset time t2, wherein T1Value is 2 DEG C, T2Value is 4 DEG C, t2Value is 10s, if Δ T14 DEG C of > or Δ T1 2 DEG C of < and duration 10s, then follow the steps S10, and otherwise, electric expansion valve is normal, and execute step S14;
S8: the temperature T of compressor return air pipe is detectedhWith the temperature T of condenser coillDifference DELTA T2=Th-Tl
S9: by Δ T2Respectively with third preset temperature T3With the 4th preset temperature T4It is compared, and the detection duration is It is no to reach third preset time t3, wherein T3Value is 0 DEG C, T4Value is 2 DEG C, t3Value is 10s, if Δ T22 DEG C of > or Δ T2 0 DEG C of < and duration 10s, then follow the steps S10, and otherwise, electric expansion valve is normal, and execute step S14;
S10: the aperture of electric expansion valve is reduced into S, and in the 4th preset time t4The delivery temperature of interior detection compressor Tp, while the case where detect low tension switch, and executing step S11, wherein S value is 600 steps, t4Value is 5min;That is electronics Expansion valve executes aperture and reduces 600 steps, and detects the delivery temperature T of compressor in 5 minutesp, and with the 5th preset temperature T5= 125 DEG C are compared, while the case where detect low tension switch, and execute step S11;
S11: by TpWith the 5th preset temperature T5It is compared, wherein T5Value is 125 DEG C, if Tp>=125 DEG C or low pressure Switch disconnects, and thens follow the steps S12, no to then follow the steps S13;
S12: electric expansion valve is normal, electric expansion valve is restored to initial preceding aperture, and execute step S14;
S13: electric expansion valve failure shows fault code, and executes step S14;
S14: electric expansion valve fault verification terminates.
By carrying out the detection of low tension switch before compressor start, it thus can know that refrigerant situation, work as low tension switch When disconnection, air-conditioning does not start and reports failure, the erroneous judgement for avoiding cold medium shortage from may cause;Simultaneously as whether low tension switch breaks It opens and compressor exhaust temperature is fixed value, do not influenced by environment temperature, therefore, by using low tension switch and compressor Delivery temperature can more accurately judge electric expansion valve fault condition as judgment basis.

Claims (7)

1. a kind of fault detection method of air conditioner electronic expansion valve, the air-conditioning includes compressor, condenser and evaporator, Low tension switch is equipped at the air entry of the compressor, it is characterised in that: the fault detection method includes following steps:
S1: air-conditioning booting, and low tension switch is detected;
S2: if low tension switch disconnects, do not start compressor, compressor emergency shutdown simultaneously reports low voltage failure;Otherwise, step S3 is executed;
S3: starting compressor, and detect the temperature T of compressor return air pipeh, the temperature T of evaporator coilzAnd condenser coil Temperature Tl, and perform the next step;
S4: detecting the runing time t of compressor, and with the first preset time t1It is compared;If t > t1, step S5 is executed, it is no Then, S3 is returned to step;
S5: whether detection air-conditioning is in refrigeration mode, if in refrigeration mode, executes step S6, otherwise, simultaneously in heating mode Execute step S8;
S6: the temperature T of compressor return air pipe is detectedhWith the temperature T of evaporator coilzDifference DELTA T1=Th-Tz
S7: by Δ T1Respectively with the first preset temperature T1With the second preset temperature T2It is compared, and detects whether the duration reaches To the second preset time t2If Δ T1> T2Or Δ T1< T1And duration t2, then follow the steps S10, otherwise, electric expansion valve Normally, and step S14 is executed;
S8: the temperature T of compressor return air pipe is detectedhWith the temperature T of condenser coillDifference DELTA T2=Th-Tl
S9: by Δ T2Respectively with third preset temperature T3With the 4th preset temperature T4It is compared, and detects whether the duration reaches To third preset time t3If Δ T2> T4Or Δ T2< T3And duration t3, then follow the steps S10, otherwise, electric expansion valve Normally, and step S14 is executed;
S10: the aperture of electric expansion valve is reduced into S, and in the 4th preset time t4The delivery temperature T of interior detection compressorp, together When detection low tension switch the case where, and execute step S11;
S11: by TpWith the 5th preset temperature T5It is compared, if Tp≥T5Or low tension switch disconnects, and thens follow the steps S12, otherwise Execute step S13;
S12: electric expansion valve is normal, electric expansion valve is restored to initial preceding aperture, and execute step S14;
S13: electric expansion valve failure shows fault code, and executes step S14;
S14: electric expansion valve fault verification terminates.
2. the fault detection method of air conditioner electronic expansion valve according to claim 1, it is characterised in that: in step s 4 First preset time t1≥6min。
3. the fault detection method of air conditioner electronic expansion valve according to claim 1, it is characterised in that: in the step s 7 First preset temperature T1It is 2 DEG C, the second preset temperature T2It is 4 DEG C, the second preset time t2For 10s.
4. the fault detection method of air conditioner electronic expansion valve according to claim 1, it is characterised in that: in step s 9 Third preset temperature T3It is 0 DEG C, the 4th preset temperature T4It is 2 DEG C, third preset time t3For 10s.
5. the fault detection method of air conditioner electronic expansion valve according to claim 1, it is characterised in that: in step slo, S is 600 steps;In step s 11, the 5th preset temperature T5It is 125 DEG C, the 4th preset time t4≤5min。
6. the fault detection method of air conditioner electronic expansion valve according to claim 5, it is characterised in that: the 4th preset time t4For 5min.
7. the fault detection method of air conditioner electronic expansion valve according to claim 2, it is characterised in that: the first preset time t1For 6min.
CN201710684170.XA 2017-08-11 2017-08-11 A kind of fault detection method of air conditioner electronic expansion valve Active CN107560101B (en)

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CN108613335B (en) * 2018-03-12 2019-12-27 珠海格力电器股份有限公司 Fault detection method and device of air conditioner, storage medium and processor
CN109282425B (en) * 2018-09-29 2020-11-24 珠海格力电器股份有限公司 Air conditioning system and self-detection method for pressure abnormity thereof
CN109455057B (en) * 2018-10-22 2020-04-28 珠海格力电器股份有限公司 Air conditioner control method and device, storage medium and air conditioner
CN109612022B (en) * 2018-11-28 2021-01-26 宁波奥克斯电气股份有限公司 Control method for preventing air conditioner from blocking valve
CN110486991B (en) * 2019-09-09 2020-08-21 珠海格力电器股份有限公司 Method, device and equipment for controlling step-out of electronic expansion valve and storage medium
CN110500825B (en) * 2019-09-24 2020-07-24 珠海格力电器股份有限公司 Electronic expansion valve fault diagnosis method and device, air conditioner and storage medium

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5009075A (en) * 1990-04-20 1991-04-23 American Standard Inc. Fault determination test method for systems including an electronic expansion valve and electronic controller
JP2000274896A (en) * 1999-03-24 2000-10-06 Tokyo Gas Co Ltd Method for sensing abnormality of expansion valve and air conditioner
KR100791118B1 (en) * 2006-10-10 2008-01-02 주식회사 대우일렉트로닉스 Method for controlling thermo off of air conditioner
CN104482638A (en) * 2014-12-09 2015-04-01 广东美的制冷设备有限公司 Air conditioner and fault detection method for electronic expansion valve of air conditioner
CN105021381A (en) * 2014-04-30 2015-11-04 广东美的暖通设备有限公司 Air conditioner electronic expansion valve fault detection method and apparatus
CN105485869A (en) * 2016-01-04 2016-04-13 广东美的暖通设备有限公司 Electronic expansion valve fault detection method and device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5009075A (en) * 1990-04-20 1991-04-23 American Standard Inc. Fault determination test method for systems including an electronic expansion valve and electronic controller
JP2000274896A (en) * 1999-03-24 2000-10-06 Tokyo Gas Co Ltd Method for sensing abnormality of expansion valve and air conditioner
KR100791118B1 (en) * 2006-10-10 2008-01-02 주식회사 대우일렉트로닉스 Method for controlling thermo off of air conditioner
CN105021381A (en) * 2014-04-30 2015-11-04 广东美的暖通设备有限公司 Air conditioner electronic expansion valve fault detection method and apparatus
CN104482638A (en) * 2014-12-09 2015-04-01 广东美的制冷设备有限公司 Air conditioner and fault detection method for electronic expansion valve of air conditioner
CN105485869A (en) * 2016-01-04 2016-04-13 广东美的暖通设备有限公司 Electronic expansion valve fault detection method and device

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