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 PDFInfo
- Publication number
- 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
- Authority
- CN
- China
- Prior art keywords
- expansion valve
- temperature
- compressor
- detection method
- fault detection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Air Conditioning Control Device (AREA)
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
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710684170.XA CN107560101B (en) | 2017-08-11 | 2017-08-11 | A kind of fault detection method of air conditioner electronic expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710684170.XA CN107560101B (en) | 2017-08-11 | 2017-08-11 | A kind of fault detection method of air conditioner electronic expansion valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107560101A CN107560101A (en) | 2018-01-09 |
| CN107560101B true CN107560101B (en) | 2019-10-25 |
Family
ID=60975373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710684170.XA Active CN107560101B (en) | 2017-08-11 | 2017-08-11 | A kind of fault detection method of air conditioner electronic expansion valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107560101B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| WO2021111559A1 (en) * | 2019-12-04 | 2021-06-10 | 三菱電機株式会社 | Control device for refrigeration cycle device and refrigeration cycle device |
| CN114001503A (en) * | 2021-10-27 | 2022-02-01 | 珠海格力电器股份有限公司 | Electronic expansion valve failure determination method, electronic expansion valve failure determination module, electronic expansion valve failure determination equipment and computer readable medium |
Citations (6)
| 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 |
-
2017
- 2017-08-11 CN CN201710684170.XA patent/CN107560101B/en active Active
Patent Citations (6)
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107560101A (en) | 2018-01-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107560101B (en) | A kind of fault detection method of air conditioner electronic expansion valve | |
| CN104676855B (en) | Transducer air conditioning and its coolant leakage detection method | |
| CN103134142B (en) | Method for detecting complete blockage of air conditioning system | |
| CN106091235B (en) | The control method and air-conditioner control system of air-conditioning system | |
| CN104482638A (en) | Air conditioner and fault detection method for electronic expansion valve of air conditioner | |
| CN109990439A (en) | A kind of control method, control device and air conditioner that the commutation of air-conditioning four-way valve is abnormal | |
| CN110173832A (en) | The control method of window air conditioner | |
| CN107314499B (en) | A kind of air-conditioning heating low tension switch protection control method | |
| CN105485771B (en) | Air-conditioning system and its refrigerant recovering control method and device | |
| CN109282424B (en) | Air conditioner control method and air conditioner control device | |
| CN104215001A (en) | Double-stage compressor air-conditioner system and control method thereof | |
| CN106247530A (en) | Many air-conditionings self checking method is dragged in many control frequency conversion one | |
| CN109282423B (en) | Method for detecting communication connection error of heat recovery multi-split air conditioning system and heat recovery multi-split air conditioning system | |
| CN109631388A (en) | A kind of air-conditioning heating four-way valve commutation exception control method, apparatus and air conditioner | |
| JP2008014609A (en) | Air-conditioning control device | |
| CN105299841A (en) | Multi-split air conditioning system and fault detection method of heat exchange valve bodies of outdoor heat exchanger of multi-split air conditioning system | |
| CN107166688A (en) | Control method, control device and the air conditioner of air conditioner | |
| CN111271821A (en) | Four-way valve reversing abnormity control method, storage medium and air conditioner | |
| CN110848874B (en) | Air conditioner refrigerant leakage detection method and device | |
| CN108317681A (en) | The control method and convertible frequency air-conditioner of convertible frequency air-conditioner | |
| CN112393377A (en) | Fault judgment method and air conditioner | |
| JP2003090582A (en) | Control method for air conditioner | |
| CN106288201A (en) | The control method of air-conditioner, control device and air-conditioner | |
| CN109028459A (en) | Air-conditioner control method and air conditioner | |
| CN108917091B (en) | Intelligent testing method for air conditioner and air conditioner thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |