CN111156653A - Fault detection method for hot defrosting electromagnetic bypass valve, storage medium and air conditioner - Google Patents
Fault detection method for hot defrosting electromagnetic bypass valve, storage medium and air conditioner Download PDFInfo
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- CN111156653A CN111156653A CN201911291838.XA CN201911291838A CN111156653A CN 111156653 A CN111156653 A CN 111156653A CN 201911291838 A CN201911291838 A CN 201911291838A CN 111156653 A CN111156653 A CN 111156653A
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- 238000010257 thawing Methods 0.000 title claims abstract description 64
- 238000001514 detection method Methods 0.000 title claims abstract description 20
- 230000002159 abnormal effect Effects 0.000 claims abstract description 25
- 238000010438 heat treatment Methods 0.000 claims abstract description 25
- 238000013486 operation strategy Methods 0.000 claims abstract description 21
- 230000008439 repair process Effects 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims description 22
- 230000008859 change Effects 0.000 claims description 6
- 239000003507 refrigerant Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 1
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- 230000003287 optical effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/38—Failure diagnosis
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- 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
- F24F11/65—Electronic processing for selecting an operating mode
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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
- F24F11/84—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 using valves
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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
- F24F11/88—Electrical aspects, e.g. circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to a fault detection method for a hot defrosting electromagnetic bypass valve, wherein temperature sensors are arranged at inlets of an electronic expansion valve and the electromagnetic bypass valve into an outdoor heat exchanger; when the air conditioner is in a heating mode for starting up and running or is in a hot defrosting state, detecting the temperature Ta of an inlet of the electronic expansion valve into the outdoor heat exchanger and the temperature Tb of an inlet of the electromagnetic bypass valve into the outdoor heat exchanger by using a temperature sensor; determining whether the electromagnetic bypass valve is normal or not by judging the temperature values of Ta and Tb; and if the operation strategy is abnormal, reminding the user to report the repair or adjust the operation strategy in time. The fault detection method for the hot defrosting electromagnetic bypass valve detects the temperature of the electronic expansion valve and the temperature of the electromagnetic bypass valve at the inlet of the electromagnetic bypass valve into the outdoor heat exchanger through the temperature sensors, judges whether the electromagnetic bypass valve is normal or not according to the temperatures, and timely reminds a user to report or adjust an operation strategy if the electromagnetic bypass valve is abnormal.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a fault detection method for a hot defrosting electromagnetic bypass valve, and further relates to a storage medium and an air conditioner for realizing the fault detection method for the hot defrosting electromagnetic bypass valve.
Background
When the heat pump air conditioner is operated in a low-temperature high-humidity environment for heating, the outdoor heat exchanger is very easy to frost, in order to guarantee the heating effect, defrosting is needed in time, the common method in the industry is to shut down and reverse defrosting, when defrosting by the scheme, the indoor temperature is greatly reduced, the comfort experience of a user is influenced, and hot air defrosting is a new defrosting mode.
Patent application No. 201811134141.7 discloses an air conditioner and a control method thereof, wherein an electromagnetic two-way valve of the air conditioner is used as a key part in a hot air defrosting scheme, and if the electromagnetic two-way valve fails, the defrosting effect and the heating capacity of the air conditioner are affected.
Therefore, how to judge whether the electromagnetic valve works normally in time is a problem to be solved by the application, and if the electromagnetic valve works abnormally, a user can be reminded of reporting the repair or adjusting the operation strategy in time.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provides a fault detection method for a hot defrosting electromagnetic bypass valve, which detects the temperature of an electronic expansion valve and the temperature of the electromagnetic bypass valve at the inlet of an outdoor heat exchanger through a temperature sensor, judges whether the electromagnetic bypass valve is normal or not through the temperatures, and timely reminds a user to report repair or adjust an operation strategy if the electromagnetic bypass valve is abnormal; the storage medium and the air conditioner are used for achieving the method for detecting the fault of the hot defrosting electromagnetic bypass valve.
In order to achieve the purpose, the invention adopts the following scheme:
a fault detection method for a hot defrosting electromagnetic bypass valve is characterized in that temperature sensors are arranged at inlets of an electronic expansion valve and the electromagnetic bypass valve into an outdoor heat exchanger; when the air conditioner is in a heating mode for starting up and running or is in a hot defrosting state, detecting the temperature Ta of an inlet of the electronic expansion valve into the outdoor heat exchanger and the temperature Tb of an inlet of the electromagnetic bypass valve into the outdoor heat exchanger by using a temperature sensor; determining whether the electromagnetic bypass valve is normal or not by judging the temperature values of Ta and Tb; and if the operation strategy is abnormal, reminding the user to report the repair or adjust the operation strategy in time.
Further, the method for detecting the fault of the hot defrosting electromagnetic bypass valve specifically comprises the following steps:
when the air conditioner is in the heating mode and is in starting operation:
the compressor is operated for t1 time to a relatively steady state operation state;
continuously operating for t2 time, and detecting the temperature values of Ta and Tb by using the temperature sensors;
if Ta-Tb is detected to be less than or equal to A, judging that the electromagnetic bypass valve is abnormal, and reminding a user of reporting repair or adjusting an operation strategy in time; wherein A is a set temperature value;
when the air conditioner is in a hot defrosting state:
continuously operating for t3 time, and detecting the temperature values of Ta and Tb by using the temperature sensors;
if the Ta-Tb is detected to be larger than or equal to B, controlling the electromagnetic bypass valve to be powered off; wherein B is a set temperature value;
continuing to operate for t4 time, and detecting the temperature values of Ta and Tb again by using the temperature sensors;
if △ Tb is less than or equal to C and △ (Ta-Tb) is less than or equal to C, controlling the electromagnetic bypass valve to be electrified and opened again;
wherein △ Tb is equal to the absolute value of the difference value of Tb detected at t3 time minus Tb detected at t4 time, namely the change value of Tb, △ (Ta-Tb) is equal to the absolute value of the difference value of Ta-Tb detected at t3 time minus Ta-Tb detected at t4 time, namely the change value of Ta-Tb, and C is the set temperature value;
continuing to operate for t5 time, and detecting the temperature values of Ta and Tb again by using the temperature sensors;
if the Ta-Tb is detected to be larger than or equal to B, judging that the electromagnetic bypass valve is abnormal, and timely reminding a user of reporting repair or adjusting an operation strategy;
when 2 continuous operation cycles are carried out, the air conditioner detects that the electromagnetic bypass valve abnormity judgment condition under the heating mode starting operation state is met, namely the electromagnetic bypass valve is judged to be abnormal, and the electromagnetic bypass valve abnormity condition under the hot defrosting state is not met, namely the electromagnetic bypass valve is judged not to be abnormal, the air conditioner timely reminds a user to report repair;
when 2 continuous operation periods are carried out, if the air conditioner detects that the electromagnetic bypass valve abnormity judgment condition under the heating mode starting operation state is not met, namely the electromagnetic bypass valve abnormity is not judged, and the electromagnetic bypass valve abnormity judgment condition under the hot defrosting state is met, namely the electromagnetic bypass valve abnormity is judged, the operation strategy is adjusted;
the operation period from the start-up operation to the end of the hot defrosting state is the first operation period, and the operation period from the end of the current hot defrosting state to the end of the next hot defrosting state is 1 operation period.
Further, the temperature of A is-6 ℃ to-4 ℃.
Further, the B is 4-6 ℃.
Further, the C is 2-4 ℃.
Further, t1 is more than or equal to 15 min.
Further, t2 is more than or equal to 3 min.
Further, t3 is more than or equal to 2 min.
Further, t4 is 3min or more and t4 or more and 1min or more; the t5 is more than or equal to 3min and more than or equal to t5 and more than or equal to 1 min.
The invention also provides a storage medium for storing a program, and the program realizes the fault detection method of the hot defrosting electromagnetic bypass valve when being called by the processor.
The air conditioner comprises a processor and a memory, wherein the memory is used for storing a program, and the program realizes the fault detection method of the hot defrosting electromagnetic bypass valve when being called by the processor; the air conditioner further includes: the system comprises a compressor, a four-way valve, an indoor heat exchanger, an electronic expansion valve, an electromagnetic bypass valve, an outdoor heat exchanger and two temperature sensors; the compressor, the four-way valve, the indoor heat exchanger, the electronic expansion valve and the outdoor heat exchanger form a heating circulation flow path; the electromagnetic bypass valve is communicated between the outlet of the indoor heat exchanger and the inlet of the outdoor heat exchanger; the two temperature sensors are respectively arranged at the inlets of the electronic expansion valve and the electromagnetic bypass valve into the outdoor heat exchanger.
Compared with the prior art, the invention has the following advantages:
according to the fault detection method for the hot defrosting electromagnetic bypass valve, the temperature sensors are arranged at the inlets of the electronic expansion valve and the electromagnetic bypass valve into the outdoor heat exchanger, so that the temperature of the inlet of the outdoor heat exchanger is controlled, whether the electromagnetic bypass valve is normal or not is judged, and if the electromagnetic bypass valve is abnormal, a user is reminded to report a repair or adjust an operation strategy in time, so that the air conditioner can be ensured to be in heating mode starting operation or in a hot defrosting state and can be reliably operated.
Drawings
The present application will be described in further detail with reference to the following drawings and detailed description.
Fig. 1 is a schematic structural view of an air conditioner of the present invention.
Fig. 2 is a flowchart of the process of the method for detecting the fault of the hot defrosting electromagnetic bypass valve when the air conditioner is in the heating mode and is in the starting operation.
Fig. 3 is a flowchart of the process of the method for detecting the fault of the hot defrosting electromagnetic bypass valve when the air conditioner is in the hot defrosting state.
The figure includes:
the system comprises a compressor 1, a four-way valve 2, an indoor heat exchanger 3, an electronic expansion valve 4, an electromagnetic bypass valve 5, an outdoor heat exchanger 6 and a temperature sensor 7.
Detailed Description
The present application is further described in conjunction with the following examples.
Example 1:
1-3, an air conditioner comprises a processor and a memory, wherein the memory is used for storing a program, and the program realizes the fault detection method of the hot defrosting electromagnetic bypass valve 5 when being called by the processor; the air conditioner further includes: the system comprises a compressor 1, a four-way valve 2, an indoor heat exchanger 3, an electronic expansion valve 4, an electromagnetic bypass valve 5, an outdoor heat exchanger 6 and two temperature sensors 7; the compressor 1, the four-way valve 2, the indoor heat exchanger 3, the electronic expansion valve 4 and the outdoor heat exchanger 6 form a heating circulating flow path; the electromagnetic bypass valve 5 is communicated between the outlet of the indoor heat exchanger 3 and the inlet of the outdoor heat exchanger 6; the two temperature sensors 7 are respectively arranged at the inlets of the electronic expansion valve 4 and the electromagnetic bypass valve 5 into the outdoor heat exchanger 6. The temperature sensors 7 are arranged at the inlets of the electronic expansion valve 4 and the electromagnetic bypass valve 5 into the outdoor heat exchanger 6, the temperature of the inlet of the outdoor heat exchanger 6 is controlled, whether the electromagnetic bypass valve 5 is normal or not is judged through the execution of the processor and the memory, if the electromagnetic bypass valve 5 is abnormal, a user is reminded to report or adjust an operation strategy in time, the air conditioner can be reliably operated when the air conditioner is started in a heating mode or in a hot air defrosting state, and the reliability of the air conditioner is improved.
In the present embodiment, the detection principle of the temperature sensor 7 is as follows:
wherein, the temperature sensor 7 detects the temperature Ta at the inlet of the electronic expansion valve 4 into the outdoor heat exchanger 6 and the temperature Tb at the inlet of the electromagnetic bypass valve 5 into the outdoor heat exchanger 6;
when the electromagnetic bypass valve 5 is normal, the electromagnetic bypass valve 5 is controlled to be opened when hot air is defrosted, so that refrigerant enters the outdoor heat exchanger 6 from the electromagnetic bypass valve 5 and the electronic expansion valve 4 respectively to be defrosted, wherein the refrigerant on the side of the electronic expansion valve 4 enters from an inlet on the outer side of the heat exchanger to be defrosted, the refrigerant on the side of the electromagnetic bypass valve 5 enters from an inlet in the middle of the heat exchanger to be defrosted, and the two sides of the refrigerant are defrosted simultaneously to improve the defrosting efficiency; at this time, the temperatures of Ta and Tb at the inlet of the outdoor heat exchanger 6 are equivalent.
When the electromagnetic bypass valve 5 fails to open (normally closed), all the refrigerant enters the outdoor heat exchanger 6 from the side of the electronic expansion valve 4 in the hot defrosting process, and the total refrigerant flow entering the outdoor heat exchanger 6 is reduced due to the fact that the flow distribution proportion is not matched with the throttling degree of the electronic expansion valve 4, and the hot defrosting efficiency is seriously reduced; at this time, Ta at the inlet of the outdoor heat exchanger 6 is much larger than Tb.
When the electromagnetic bypass valve 5 fails to close (normally open), most of refrigerant enters from an inlet in the middle of the outdoor heat exchanger 6 without throttling from the electromagnetic bypass valve 5 side to be defrosted in the normal heating operation process, so that the heating capacity is greatly reduced; at this time, the tube temperature Ta of the outdoor heat exchanger 6 is much less than Tb.
According to the detection principle of the temperature sensor 7, the invention provides a method for detecting the fault of the hot defrosting electromagnetic bypass valve 5. The hot defrosting electromagnetic bypass valve 5 fault detection method is realized when a program stored in a memory is called by a processor. Temperature sensors 7 are arranged at the inlets of the electronic expansion valve 4 and the electromagnetic bypass valve 5 into the outdoor heat exchanger 6; when the air conditioner is in the heating mode for starting up operation or in the hot defrosting state, the temperature sensor 7 is used for detecting the temperature Ta of the electronic expansion valve 4 entering the inlet of the outdoor heat exchanger 6 and the temperature Tb of the electromagnetic bypass valve 5 entering the inlet of the outdoor heat exchanger 6; determining whether the electromagnetic bypass valve 5 is normal or not by judging the temperature values of Ta and Tb; and if the operation strategy is abnormal, reminding the user to report the repair or adjust the operation strategy in time. The method specifically comprises the following steps:
when the air conditioner is in the heating mode and is in starting operation:
the compressor 1 is operated for t1 time to a relatively steady state operation state; t1 is more than or equal to 15 min. Preferably for 15 min.
Continuously operating for t2 time, and detecting the temperature values of Ta and Tb by using the temperature sensor 7; t2 is more than or equal to 3 min. Preferably for 3 min.
If Ta-Tb is detected to be less than or equal to A, judging that the electromagnetic bypass valve 5 is abnormal, and reminding a user of reporting repair or adjusting an operation strategy in time; wherein A is a set temperature value; the A is-6 to-4 ℃. Preferably-5 ℃.
When the air conditioner is in a hot defrosting state:
continuously operating for t3 time, and detecting the temperature values of Ta and Tb by using the temperature sensor 7; t3 is more than or equal to 2 min. Preferably for 2 min.
If the Ta-Tb is detected to be more than or equal to B, controlling the electromagnetic bypass valve 5 to be powered off; wherein B is a set temperature value; the B is 4-6 ℃. Preferably 5 deg.c.
Continuing to operate for t4 time, and detecting the temperature values of Ta and Tb again by using the temperature sensor 7; the t4 is more than or equal to 3min and more than or equal to t4 and more than or equal to 1 min; preferably for 2 min.
And controlling the electromagnetic bypass valve 5 to be electrified and opened again if △ Tb is less than or equal to C and △ (Ta-Tb) is less than or equal to C, wherein the C is 2-4 ℃, and is preferably 3 ℃.
Wherein △ Tb is equal to the absolute value of the difference value of Tb detected at t3 time minus Tb detected at t4 time, namely the change value of Tb, △ (Ta-Tb) is equal to the absolute value of the difference value of Ta-Tb detected at t3 time minus Ta-Tb detected at t4 time, namely the change value of Ta-Tb, and C is the set temperature value;
continuing to operate for t5 time, and detecting the temperature values of Ta and Tb again by using the temperature sensor 7; if the Ta-Tb is detected to be larger than or equal to B, the electromagnetic bypass valve 5 is judged to be abnormal, and a user is timely reminded to report for repair or adjust the operation strategy. The t5 is more than or equal to 3min and more than or equal to t5 and more than or equal to 1 min. Preferably for 2 min;
when the air conditioner detects that the abnormal judgment condition of the electromagnetic bypass valve under the heating mode starting operation state is met in 2 continuous operation periods, the abnormal condition of the electromagnetic bypass valve 5 is judged, the abnormal condition of the electromagnetic bypass valve 5 is not met under the hot defrosting state, and the abnormal condition of the electromagnetic bypass valve 5 is not judged, the air conditioner timely reminds a user to report repair
When 2 continuous operation cycles are carried out, the air conditioner detects that the electromagnetic bypass valve 5 abnormity judgment condition under the heating mode starting operation state is not met, namely the electromagnetic bypass valve 5 is not judged to be abnormal, and the electromagnetic bypass valve 5 abnormity judgment condition under the hot defrosting state is met, namely the electromagnetic bypass valve 5 is judged to be abnormal, and then the operation strategy is adjusted.
In the invention, the air conditioner is kept running without processing in other situations.
The operation period from the start-up operation to the end of the hot defrosting state is the first operation period, and the operation period from the end of the current hot defrosting state to the end of the next hot defrosting state is 1 operation period.
By the method, whether the electromagnetic bypass valve 5 is normal or not can be judged, and if the electromagnetic bypass valve 5 is abnormal, a user is timely reminded to report a repair or adjust an operation strategy so as to ensure that the air conditioner can reliably operate when the air conditioner is in a heating mode and is started to operate or when the air conditioner is in a hot air defrosting state.
Example 2:
the invention also provides a storage medium for storing a program, and the program realizes the fault detection method of the hot defrosting electromagnetic bypass valve 5 when being called by the processor. The program may be stored in a storage medium if it is implemented in the form of a software functional unit and sold or used as a separate product. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a device to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the protection scope of the present application, and although the present application is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present application without departing from the spirit and scope of the technical solutions of the present application.
Claims (10)
1. A fault detection method for a hot defrosting electromagnetic bypass valve is characterized in that temperature sensors are arranged at inlets of an electronic expansion valve and the electromagnetic bypass valve into an outdoor heat exchanger; the method is characterized in that when the air conditioner is in a heating mode for starting up and running or is in a hot defrosting state, a temperature sensor is used for detecting the temperature Ta of an inlet of an electronic expansion valve into an outdoor heat exchanger and the temperature Tb of an inlet of an electromagnetic bypass valve into the outdoor heat exchanger; determining whether the electromagnetic bypass valve is normal or not by judging the temperature values of Ta and Tb; and if the operation strategy is abnormal, reminding the user to report the repair or adjust the operation strategy in time.
2. The method for detecting the fault of the hot defrosting electromagnetic bypass valve according to claim 1, wherein the method for detecting the fault of the hot defrosting electromagnetic bypass valve specifically comprises the following steps:
when the air conditioner is in the heating mode and is in starting operation:
the compressor is operated for t1 time to a relatively steady state operation state;
continuously operating for t2 time, and detecting the temperature values of Ta and Tb by using the temperature sensors;
if Ta-Tb is detected to be less than or equal to A, judging that the electromagnetic bypass valve is abnormal; wherein A is a set temperature value;
when the air conditioner is in a hot defrosting state:
continuously operating for t3 time, and detecting the temperature values of Ta and Tb by using the temperature sensors;
if the Ta-Tb is detected to be larger than or equal to B, controlling the electromagnetic bypass valve to be powered off; wherein B is a set temperature value;
continuing to operate for t4 time, and detecting the temperature values of Ta and Tb again by using the temperature sensors;
if △ Tb is less than or equal to C and △ (Ta-Tb) is less than or equal to C, controlling the electromagnetic bypass valve to be electrified and opened again;
wherein △ Tb is equal to the absolute value of the difference value of Tb detected at t3 time minus Tb detected at t4 time, namely the change value of Tb, △ (Ta-Tb) is equal to the absolute value of the difference value of Ta-Tb detected at t3 time minus Ta-Tb detected at t4 time, namely the change value of Ta-Tb, and C is the set temperature value;
continuing to operate for t5 time, and detecting the temperature values of Ta and Tb again by using the temperature sensors;
if the Ta-Tb is detected to be larger than or equal to B, judging that the electromagnetic bypass valve is abnormal;
when 2 continuous operation cycles are carried out, the air conditioner detects that the electromagnetic bypass valve abnormity judgment condition under the heating mode starting operation state is met, namely the electromagnetic bypass valve is judged to be abnormal, and the electromagnetic bypass valve abnormity condition under the hot defrosting state is not met, namely the electromagnetic bypass valve is judged not to be abnormal, the air conditioner timely reminds a user to report repair;
when 2 continuous operation periods are carried out, if the air conditioner detects that the electromagnetic bypass valve abnormity judgment condition under the heating mode starting operation state is not met, namely the electromagnetic bypass valve abnormity is not judged, and the electromagnetic bypass valve abnormity judgment condition under the hot defrosting state is met, namely the electromagnetic bypass valve abnormity is judged, the operation strategy is adjusted;
the operation period from the start-up operation to the end of the hot defrosting state is the first operation period, and the operation period from the end of the current hot defrosting state to the end of the next hot defrosting state is 1 operation period.
3. The method for detecting the fault of the hot defrosting electromagnetic bypass valve according to claim 2, wherein A is-6 ℃ to-4 ℃.
4. The method for detecting the fault of the hot defrosting electromagnetic bypass valve according to claim 2, wherein the temperature B is 4-6 ℃.
5. The method for detecting the fault of the hot defrosting electromagnetic bypass valve according to claim 2, wherein the temperature C is 2-4 ℃.
6. The method for detecting the fault of the hot defrosting electromagnetic bypass valve according to claim 2, wherein t1 is more than or equal to 15 min.
7. The fault detection method for the hot defrosting electromagnetic bypass valve according to claim 2, wherein t2 is more than or equal to 3 min; t3 is more than or equal to 2 min.
8. The method for detecting the fault of the hot defrosting electromagnetic bypass valve according to claim 2, wherein t4 is 3min ≥ t4 ≥ 1 min; the t5 is more than or equal to 3min and more than or equal to t5 and more than or equal to 1 min.
9. Storage medium for storing a program, characterized in that the program when invoked by a processor implements the thermal defrost electromagnetic bypass valve fault detection method according to any one of claims 1-8.
10. An air conditioner comprising a processor and a memory, wherein the memory is used for storing a program which when invoked by the processor implements the thermal defrost electromagnetic bypass valve fault detection method of any one of claims 1-8; the air conditioner further includes: the system comprises a compressor, a four-way valve, an indoor heat exchanger, an electronic expansion valve, an electromagnetic bypass valve, an outdoor heat exchanger and two temperature sensors; the compressor, the four-way valve, the indoor heat exchanger, the electronic expansion valve and the outdoor heat exchanger form a heating circulation flow path; the electromagnetic bypass valve is communicated between the outlet of the indoor heat exchanger and the inlet of the outdoor heat exchanger; the two temperature sensors are respectively arranged at the inlets of the electronic expansion valve and the electromagnetic bypass valve into the outdoor heat exchanger.
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| CN201911291838.XA CN111156653B (en) | 2019-12-16 | 2019-12-16 | Fault detection method for hot defrosting electromagnetic bypass valve, storage medium and air conditioner |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113865005A (en) * | 2021-10-28 | 2021-12-31 | 珠海格力电器股份有限公司 | Defrosting shunting method, air conditioning system and air conditioning control method |
| CN114688707A (en) * | 2020-12-28 | 2022-07-01 | 广东美的制冷设备有限公司 | Air conditioner, control method and device thereof and readable storage medium |
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| KR20050037260A (en) * | 2003-10-17 | 2005-04-21 | 위니아만도 주식회사 | By-pass structure for outdoor device of air-conditioner |
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| CN113865005A (en) * | 2021-10-28 | 2021-12-31 | 珠海格力电器股份有限公司 | Defrosting shunting method, air conditioning system and air conditioning control method |
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