CN111271821B - Four-way valve reversing abnormity control method, storage medium and air conditioner - Google Patents
Four-way valve reversing abnormity control method, storage medium and air conditioner Download PDFInfo
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- CN111271821B CN111271821B CN202010181392.1A CN202010181392A CN111271821B CN 111271821 B CN111271821 B CN 111271821B CN 202010181392 A CN202010181392 A CN 202010181392A CN 111271821 B CN111271821 B CN 111271821B
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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
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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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
- F24F11/70—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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- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a four-way valve reversing abnormity control method, a storage medium and an air conditioner. Aiming at various running states of the unit, the reversing condition of the four-way valve is detected and judged by setting different judgment standards, and when the four-way valve is abnormally reversed, a fault can be timely and accurately judged, so that the unit is protected.
Description
Technical Field
The invention relates to the technical field of air conditioner control, in particular to a four-way valve reversing abnormity control method, a storage medium and an air conditioner.
Background
In the heat pump system, the four-way valve is a device for realizing the conversion between the refrigeration mode and the heating mode, thereby realizing the heating function of the heat pump air conditioner and meeting the requirements of users. Aiming at the air-cooled cold and hot water air conditioning unit, when the four-way valve is abnormally reversed, the system can not normally operate in heating and refrigerating, and the use of a user is seriously influenced. When the four-way valve in the heating operation mode is abnormal, the freezing crack heat exchanger is easily caused to operate in a refrigerating state of the unit, and after the unit enters defrosting, if the four-way valve is not switched in time, the unit cannot realize the defrosting function. Therefore, the commutation reliability of the key component of the four-way valve is particularly important to the reliability of the whole heat pump system.
In the prior art, a patent with application number of CN201310061445.6 relates to an intelligent detection technology of an air conditioner, and discloses a method for detecting the abnormality of a four-way valve of the air conditioner, which automatically detects and judges whether the four-way valve is normal or not and displays a fault in time, thereby providing convenience for fault and after-sale maintenance. The method comprises the following steps: when the air conditioner is started to operate, the working mode is judged, when the air conditioner operates in a heating or refrigerating mode, the operation time of the air conditioner is timed, when the operation time reaches a preset time threshold value, the current working frequency of the compressor is collected, if the current working frequency of the compressor reaches a preset frequency threshold value, the difference value between the indoor environment temperature and the outdoor heat exchanger coil temperature and the difference value between the outdoor heat exchanger coil temperature and the outdoor environment temperature are detected and calculated according to the specific working mode of the air conditioner, and when the conditions are met, the four-way valve is judged to be abnormal. The method is suitable for detecting the household conventional air conditioner, but is not suitable for the air-cooled cold and hot water unit, and cannot analyze and judge the specific condition of the four-way valve of the air-cooled cold and hot water unit.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a four-way valve reversing abnormity control method, which utilizes the combination detection of refrigerant system parameters and waterway system parameters to judge the reversing condition of the four-way valve, and can timely and accurately judge faults and protect a unit when the four-way valve is abnormally reversed.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for controlling abnormal reversing of a four-way valve of an air conditioning unit comprises the steps of detecting the current running state of the unit after the air conditioning unit is started to run, detecting the running time of a compressor in real time, detecting the temperature of water, the temperature of inlet water and the temperature of a refrigerant liquid pipe when the running time of the compressor reaches a set value, calculating the temperature difference between the temperature of the water and the temperature of the inlet water, calculating the temperature difference between the temperature of the water and the temperature of the refrigerant liquid pipe, judging whether the four-way valve of the unit is. Aiming at various running states of the unit, the reversing condition of the four-way valve is detected and judged by setting different judgment standards, and when the four-way valve is abnormally reversed, a fault can be timely and accurately judged, so that the unit is protected.
Further, whether the four-way valve of the unit is normally switched according to the temperature difference is specifically: when the unit is in a heating operation state, after the compressor operates for T1 time, detecting the water inlet temperature Tj, the water outlet temperature Tc and the refrigerant liquid pipe temperature Ty, and when the temperature difference Tj-Tc between the water inlet temperature and the water outlet temperature is larger than delta T1 and the temperature difference Tc-Ty between the water outlet temperature and the refrigerant liquid pipe temperature is larger than delta T2, judging that the four-way valve of the unit is not in place for reversing, and the abnormal reversing condition exists, wherein T1 is a preset time value, delta T1 and delta T2 are preset temperature differences, T1 is larger than or equal to 30s and smaller than 300s, delta T1 is larger than or equal to 0 ℃ and smaller than 20 ℃, and delta T2 is larger than or equal to 0 ℃ and smaller than or equal to. Whether the four-way valve is abnormal in reversing is judged by combining the temperature difference between the inlet water temperature and the outlet water temperature with the temperature difference between the outlet water temperature and the refrigerant liquid pipe, and the four-way valve is judged to be abnormal in reversing only when two judgment conditions are met, so that the judgment accuracy is ensured.
Further, whether the four-way valve of the unit is normally switched according to the temperature difference is specifically: when the unit is in a heating operation state, after the compressor operates for T1 time, detecting the water inlet temperature Tj, the water outlet temperature Tc and the refrigerant liquid pipe temperature Ty, and when the temperature difference value Tj-Tc between the water inlet temperature and the water outlet temperature is not more than delta T1 or the temperature difference value Tc-Ty between the water outlet temperature and the refrigerant liquid pipe temperature is not more than delta T2, judging that the four-way valve of the unit is reversed in place, and the unit normally operates. When any one of the two temperature difference values is smaller than or equal to the set temperature difference value, the temperature change condition is normal, and the four-way valve is normal in reversing.
Further, whether the four-way valve of the unit is normally switched according to the temperature difference is specifically: when the unit is in a defrosting operation state, after a compressor operates for T2 time, detecting an inlet water temperature Tj, an outlet water temperature Tc and a refrigerant liquid pipe temperature Ty, and when a temperature difference Tc-Tj between the inlet water temperature and the outlet water temperature is more than delta T3 and a temperature difference Ty-Tc between the outlet water temperature and the refrigerant liquid pipe temperature is more than delta T4, judging that the four-way valve of the unit is not in place for reversing, and a reversing abnormal condition exists, wherein T2 is a preset time value, delta T3 and delta T4 are preset temperature differences, T1 is more than or equal to 10s and less than or equal to 200s, delta T3 is more than or equal to 0 ℃ and less than or equal to 20 ℃, and delta T4 is more than or equal to 0 ℃ and. Aiming at the defrosting process of the unit, the running time of the compressor is required to be shorter than the heating running time, and meanwhile, the adaptability of the set judgment temperature difference is also required to be improved, so that the defrosting is completely, cleanly and effectively ensured.
Further, whether the four-way valve of the unit is normally switched according to the temperature difference is specifically: when the unit is in a defrosting operation state, after the compressor operates for T2 time, detecting the water inlet temperature Tj, the water outlet temperature Tc and the refrigerant liquid pipe temperature Ty, and when the temperature difference Tc-Tj between the water inlet temperature and the water outlet temperature is less than or equal to delta T3 or the temperature difference Ty-Tc between the water outlet temperature and the refrigerant liquid pipe temperature is less than or equal to delta T4, judging that the four-way valve of the unit is reversed in place, and the unit normally operates. When the unit defrosts, after the compressor runs for a period of time, when the temperature difference between the inlet water temperature and the outlet water temperature is not large, or the temperature difference between the outlet water temperature and the temperature of the refrigerant liquid pipe is not large, the temperature condition is normal, the reversing of the four-way valve is normal, and the normal and stable defrosting process is ensured.
Further, whether the four-way valve of the unit is normally switched according to the temperature difference is specifically: when the unit is in a refrigeration operation state, after the compressor operates for T3 time, detecting the water inlet temperature Tj, the water outlet temperature Tc and the refrigerant liquid pipe temperature Ty, and when the temperature difference Tc-Tj between the water inlet temperature and the water outlet temperature is more than delta T5 and the temperature difference Ty-Tc between the water outlet temperature and the refrigerant liquid pipe temperature is more than delta T6, judging that the four-way valve of the unit is not in place for reversing, and the abnormal reversing condition exists, wherein T3 is a preset time value, delta T5 and delta T6 are preset temperature differences, T1 is more than or equal to 10s and less than or equal to 300s, delta T3 is more than or equal to 0 ℃ and less than or equal to 20 ℃, and delta T4 is more than or equal to 0 ℃.
Further, whether the four-way valve of the unit is normally switched according to the temperature difference is specifically: when the unit is in a refrigeration running state, the compressor runs for T3 time, the water inlet temperature Tj, the water outlet temperature Tc and the refrigerant liquid pipe temperature Ty are detected, and when the temperature difference Tc-Tj between the water inlet temperature and the water outlet temperature is not more than delta T5 or the temperature difference Ty-Tc between the water outlet temperature and the refrigerant liquid pipe temperature is not more than delta T6, the four-way valve of the unit is judged to be reversed in place, and the unit normally runs.
A storage medium for storing a computer program that, when invoked by a processor, implements the four-way valve commutation abnormality control method of any one of the above.
An air conditioner comprises a processor and a memory, wherein the memory is used for storing a computer program, and the computer program is used for realizing the four-way valve reversing abnormity control method when being called by the processor.
The four-way valve reversing abnormity control method, the storage medium and the air conditioner have the advantages that: when the four-way valve is abnormally reversed, the fault is judged timely and accurately according to the system parameters, and the unit is protected; when the unit is defrosting, judging whether the four-way valve is abnormal in reversing according to system parameters to ensure that the unit operates normally; aiming at the problem that the reversing abnormality of the four-way valve is not detected timely at present, the judgment of the relation between the temperature of a liquid pipe of a heat exchanger in a refrigerant system and the temperature of outlet water of a water system is increased, and the detection accuracy is improved; the refrigerating, heating and defrosting processes of the unit are detected completely, and the accuracy of fault judgment and the reliability of the system are improved.
Drawings
FIG. 1 is a schematic flow chart of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person skilled in the art without making any inventive step are within the scope of the present invention.
Example 1: a method for controlling abnormal reversing of a four-way valve.
As shown in fig. 1, a method for controlling abnormal reversing of a four-way valve comprises the following specific steps:
and after the unit is started, the refrigerating and heating running states are confirmed according to the running mode set by the user. And in the unit heating operation process, heating and defrosting state confirmation is carried out according to the defrosting state confirmed by the unit controller.
After the unit heating operation is started or defrosting is finished, after the compressor operates for 90s, the relationship between the water inlet temperature Tj and the water outlet temperature Tc and the relationship between the water outlet temperature Tc and the refrigerant liquid pipe temperature Ty are judged, and if the relationship satisfies the following conditions: if Tj-Tc is more than 1 ℃ and Tc-Ty is more than 4 ℃, the four-way valve of the unit is judged to be not in place and abnormal in reversing exists. And if the judgment condition cannot be met simultaneously, the unit normally operates.
When the unit defrosting is operated, after the compressor operates for 60s, the relationship between the water inlet temperature Tj and the water outlet temperature Tc and the relationship between the water outlet temperature and the temperature of the refrigerant liquid pipe are judged, and if the relationship satisfies the following conditions: if Tc-Tj is more than 4 ℃ and Ty-Tc is more than 6 ℃, the four-way valve of the unit is judged to be not in place and abnormal in reversing exists. And if the judgment condition cannot be met simultaneously, the unit normally operates.
When the unit is in refrigeration operation, after the compressor is started to operate for 180s, the relationship between the water inlet temperature Tj and the water outlet temperature Tc and the relationship between the water outlet temperature and the temperature of the refrigerant liquid pipe are judged, and if the relationship satisfies the following conditions: if Tc-Tj is more than 1 ℃ and Ty-Tc is more than 10 ℃, the four-way valve of the unit is judged to be not in place and abnormal in reversing exists. And if the judgment condition cannot be met simultaneously, the unit normally operates.
Example 2: a storage medium.
A storage medium for storing a computer program that implements the four-way valve commutation abnormality control method described in embodiment 1 when the computer program is called by a processor.
Example 3: an air conditioner.
An air conditioner comprises a processor and a memory, wherein the memory is used for storing a computer program, and the method for controlling the reversing abnormality of the four-way valve in embodiment 1 is implemented when the computer program is called by the processor.
The above description is only for the preferred embodiment of the present invention, but the present invention should not be limited to the embodiment and the disclosure of the drawings, and therefore, all equivalent or modifications that do not depart from the spirit of the present invention are intended to fall within the scope of the present invention.
Claims (8)
1. A four-way valve reversing abnormity control method is characterized in that after an air conditioning unit is started to operate, the current operation state of the unit is detected, the operation time of a compressor is detected in real time, when the operation time of the compressor reaches a set value, the water temperature, the water inlet temperature and the temperature of a refrigerant liquid pipe are detected, the temperature difference between the water temperature and the water inlet temperature is calculated, the temperature difference between the water temperature and the temperature of the refrigerant liquid pipe is calculated, whether the four-way valve of the unit is normally reversed is judged according to the temperature difference, and the operation state; whether the four-way valve of the unit is normally reversed or not is judged according to the temperature difference value specifically as follows: when the unit is in a defrosting operation state, after a compressor operates for T2 time, detecting an inlet water temperature Tj, an outlet water temperature Tc and a refrigerant liquid pipe temperature Ty, and when a temperature difference Tc-Tj between the inlet water temperature and the outlet water temperature is Tc-Tj > Delta T3 and a temperature difference Ty-Tc between the outlet water temperature and the refrigerant liquid pipe temperature is Ty-Tc > Delta T4, judging that the four-way valve of the unit is not in place in reversing and a reversing abnormal condition exists, wherein T2 is a preset time value, and Delta T3 and Delta T4 are preset temperature differences.
2. The method for controlling the abnormal reversing of the four-way valve according to claim 1, wherein the step of judging whether the four-way valve of the unit is normally reversed according to the temperature difference specifically comprises the following steps: when the unit is in a heating operation state, after the compressor operates for T1 time, detecting an inlet water temperature Tj, an outlet water temperature Tc and a refrigerant liquid pipe temperature Ty, and when a temperature difference value Tj-Tc between the inlet water temperature and the outlet water temperature is larger than delta T1 and a temperature difference value Tc-Ty between the outlet water temperature and the refrigerant liquid pipe temperature is larger than delta T2, judging that the four-way valve of the unit is not in place for commutation and a commutation abnormal condition exists, wherein T1 is a preset time value, and delta T1 and delta T2 are preset temperature difference values.
3. The method for controlling the abnormal reversing of the four-way valve according to claim 1, wherein the step of judging whether the four-way valve of the unit is normally reversed according to the temperature difference specifically comprises the following steps: when the unit is in a heating operation state, after the compressor operates for T1 time, detecting the water inlet temperature Tj, the water outlet temperature Tc and the refrigerant liquid pipe temperature Ty, and when the temperature difference value Tj-Tc between the water inlet temperature and the water outlet temperature is not more than delta T1 or the temperature difference value Tc-Ty between the water outlet temperature and the refrigerant liquid pipe temperature is not more than delta T2, judging that the four-way valve of the unit is reversed in place, and the unit normally operates.
4. The method for controlling the abnormal reversing of the four-way valve according to claim 1, wherein the step of judging whether the four-way valve of the unit is normally reversed according to the temperature difference specifically comprises the following steps: when the unit is in a defrosting operation state, after the compressor operates for T2 time, detecting the water inlet temperature Tj, the water outlet temperature Tc and the refrigerant liquid pipe temperature Ty, and when the temperature difference Tc-Tj between the water inlet temperature and the water outlet temperature is less than or equal to delta T3 or the temperature difference Ty-Tc between the water outlet temperature and the refrigerant liquid pipe temperature is less than or equal to delta T4, judging that the four-way valve of the unit is reversed in place, and the unit normally operates.
5. The method for controlling the abnormal reversing of the four-way valve according to claim 1, wherein the step of judging whether the four-way valve of the unit is normally reversed according to the temperature difference specifically comprises the following steps: when the unit is in a refrigeration operation state, after the compressor operates for T3 time, detecting an inlet water temperature Tj, an outlet water temperature Tc and a refrigerant liquid pipe temperature Ty, and when a temperature difference Tc-Tj between the inlet water temperature and the outlet water temperature is greater than delta T5 and a temperature difference Ty-Tc between the outlet water temperature and the refrigerant liquid pipe temperature is greater than delta T6, judging that the four-way valve of the unit is not in place for commutation and a commutation abnormal condition exists, wherein T3 is a preset time value, and delta T5 and delta T6 are preset temperature differences.
6. The method for controlling the abnormal reversing of the four-way valve according to claim 1, wherein the step of judging whether the four-way valve of the unit is normally reversed according to the temperature difference specifically comprises the following steps: when the unit is in a refrigeration running state, the compressor runs for T3 time, the water inlet temperature Tj, the water outlet temperature Tc and the refrigerant liquid pipe temperature Ty are detected, and when the temperature difference Tc-Tj between the water inlet temperature and the water outlet temperature is not more than delta T5 or the temperature difference Ty-Tc between the water outlet temperature and the refrigerant liquid pipe temperature is not more than delta T6, the four-way valve of the unit is judged to be reversed in place, and the unit normally runs.
7. A storage medium storing a computer program, wherein the computer program, when invoked by a processor, implements the four-way valve commutation abnormality control method of any one of claims 1-6.
8. An air conditioner comprising a processor and a memory for storing a computer program, wherein the computer program when invoked by the processor implements the four-way valve commutation abnormality control method of any one of claims 1-6.
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112032923A (en) * | 2020-08-03 | 2020-12-04 | 珠海格力电器股份有限公司 | Four-way valve reversing abnormity detection method and device and cold and hot water air conditioning unit |
| CN112216909A (en) * | 2020-10-10 | 2021-01-12 | 广州小鹏汽车科技有限公司 | Four-way valve fault detection method and device, vehicle and storage medium |
| CN112158049A (en) * | 2020-10-10 | 2021-01-01 | 广州小鹏汽车科技有限公司 | Three-way valve fault detection method and device, vehicle and storage medium |
| CN112594866A (en) * | 2020-12-31 | 2021-04-02 | 广东积微科技有限公司 | Anti-freezing control system and control method for multi-split hydraulic module |
| CN112611071A (en) * | 2021-01-14 | 2021-04-06 | 南京天加环境科技有限公司 | Improved method for judging failure of four-way valve of air-cooled air conditioning unit |
| CN114046591A (en) * | 2021-12-01 | 2022-02-15 | 南京天加环境科技有限公司 | Control method for household water machine |
| CN114183883A (en) * | 2021-12-09 | 2022-03-15 | 珠海格力电器股份有限公司 | Detection method of four-way valve and air conditioner |
| CN114440408B (en) * | 2021-12-09 | 2023-10-31 | 海信空调有限公司 | Four-way valve control method and device for one-to-many air conditioner and one-to-many air conditioner |
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| CN105258331A (en) * | 2015-10-30 | 2016-01-20 | 广东美的暖通设备有限公司 | Anti-freezing control method and system for failure of four-way valve of heat pump water heater |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH04139343A (en) * | 1990-10-01 | 1992-05-13 | Toshiba Corp | Air-conditioning device |
| JPH09243138A (en) * | 1996-03-12 | 1997-09-16 | Fujitsu General Ltd | Method for controlling air conditioner |
| JP3589203B2 (en) * | 2001-07-17 | 2004-11-17 | ダイキン工業株式会社 | Air conditioner |
| CN206430414U (en) * | 2016-11-21 | 2017-08-22 | 珠海格力电器股份有限公司 | A kind of waterway control system of source pump |
| CN107270600B (en) * | 2017-06-07 | 2019-05-17 | 珠海格力电器股份有限公司 | A kind of detection method, device and heat pump unit that four-way valve commutation is abnormal |
| CN109237722B (en) * | 2018-09-20 | 2020-01-07 | 珠海格力电器股份有限公司 | Four-way valve fault detection method, four-way valve fault detection device and air conditioning system |
| CN109556232B (en) * | 2018-10-23 | 2020-02-04 | 珠海格力电器股份有限公司 | Four-way valve abnormality detection method and device and air conditioning unit |
| CN109631384B (en) * | 2018-12-13 | 2019-12-31 | 珠海格力电器股份有限公司 | Control device and control method of heat pump system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105258331A (en) * | 2015-10-30 | 2016-01-20 | 广东美的暖通设备有限公司 | Anti-freezing control method and system for failure of four-way valve of heat pump water heater |
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