CN112611071A - Improved method for judging failure of four-way valve of air-cooled air conditioning unit - Google Patents
Improved method for judging failure of four-way valve of air-cooled air conditioning unit Download PDFInfo
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- CN112611071A CN112611071A CN202110045840.XA CN202110045840A CN112611071A CN 112611071 A CN112611071 A CN 112611071A CN 202110045840 A CN202110045840 A CN 202110045840A CN 112611071 A CN112611071 A CN 112611071A
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- temperature sensor
- turning
- heat exchanger
- unit
- environment temperature
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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
- F24F11/50—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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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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
Abstract
The invention relates to an improved method for judging failure of a four-way valve of an air-cooled air conditioning unit.
Description
Technical Field
The invention relates to an air conditioner control method, in particular to a method for judging failure of a four-way valve of an air-cooled air conditioning unit, and particularly relates to an improved method for judging failure of a four-way valve of an air-cooled air conditioning unit.
Background
When the air conditioning system operates under the working condition with small high-low pressure difference, the sliding sheet in the four-way valve does not move in place due to insufficient high-low pressure difference of the sliding sheet of the four-way valve. At present, a common air-cooled air conditioning unit defaults that a four-way valve is normal. Once the four-way valve fails, the unit can continue to operate without reporting a fault and stopping. Especially, when the four-way valve is communicated with air, the air suction and exhaust port can be directly communicated when the compressor runs. Some air-cooled air conditioning units also adopt pressure sensors, whether the four-way valve fails or not is judged by monitoring high pressure and low pressure, but the cost for increasing the pressure sensors is too high, and the control is complicated.
Therefore, the existing method for judging the failure of the four-way valve needs to be perfected, and the use requirement is better met. On one hand, more units are required to be covered, and on the other hand, failure diagnosis of the four-way valve is ensured to be more comprehensive, so that reliable operation of the units is ensured.
Disclosure of Invention
The invention aims to provide an improved method for judging the failure of a four-way valve of an air-cooled air conditioning unit, which is simple to control and low in cost, can cover more units, can ensure more comprehensive failure diagnosis of the four-way valve and improves the reliability of unit operation.
The technical scheme of the invention is as follows:
an improved method for judging failure of a four-way valve of an air-cooled air conditioning unit is applied to the following air conditioning unit. The air conditioning unit comprises a refrigerant circulating system formed by connecting a compressor, an outdoor heat exchanger, an electronic expansion valve, an indoor heat exchanger and a gas-liquid separator; an outer plate temperature sensor is arranged on the outdoor heat exchanger; an inner plate temperature sensor is arranged on the indoor heat exchanger; an inner disc air inlet temperature sensor is arranged on the air inlet side of the indoor heat exchanger; the system also comprises an indoor environment temperature sensor arranged indoors and an outdoor environment temperature sensor arranged outdoors; the outer disc temperature sensor, the inner disc air inlet temperature sensor, the indoor environment temperature sensor and the outdoor environment temperature sensor are electrically connected with a controller of the air conditioning unit; the controller is capable of timing;
the judging method comprises the following steps:
1) starting up the unit to run, and starting timing by the controller;
2) if the mode is the refrigeration mode, turning to the step 3); if the mode is heating mode, go to step 5)
3) After the unit operates for 5 minutes, the outer plate temperature T of the outdoor heat exchanger is obtained through the outer plate temperature sensorwpAnd obtaining the outdoor environment temperature T through an outdoor environment temperature sensorw；
4) If T iswp-TwTurning to step 12) at the temperature of more than 5 ℃; otherwise, turning to step 13);
5) if the internal machine is a circulating fan set and the defrosting operation is not performed, turning to the step 6); if the internal machine is a brand new fan set and is not defrosted, turning to the step 8); if the defrosting operation is carried out, turning to the step 10);
6) after the unit is heated for 5 minutes or the defrosting exits from the heating operation for 5 minutes, the inner disc temperature T of the indoor heat exchanger is obtained through the inner disc temperature sensornpAnd obtaining the indoor environment temperature T through an indoor environment temperature sensorn；
7) If T isnp-TnTurning to step 12) at the temperature of more than 5 ℃; otherwise, go to step 13).
8) After the unit is heated for 5 minutes or the defrosting exits from the heating operation for 5 minutes, the inner disc temperature T of the indoor heat exchanger is obtained through the inner disc temperature sensornpAnd the air inlet temperature T of the inner disk is obtained by the air inlet temperature sensor of the inner disknpj；
9) If T isnp-TnpjTurning to step 12) at the temperature of more than 5 ℃; otherwise, go to step 13).
10) After the unit is defrosted for 4 minutes, the temperature T of the outer plate of the outdoor heat exchanger is acquired by the outer plate temperature sensorwpAnd obtaining the outdoor environment temperature T through an outdoor environment temperature sensorw；
11) If T iswp-TwTurning to step 12) at the temperature of more than 5 ℃; otherwise, turning to step 13);
12) judging that the four-way valve is normal, and continuing to operate the unit;
13) and (5) judging that the four-way valve fails, stopping the unit and reporting the fault.
The invention has the beneficial effects that:
the invention has reasonable design, clear logic, convenient control and low cost, can more comprehensively and accurately diagnose the failure of the four-way valve, can cover more units and effectively improve the reliability of the operation of the units.
Drawings
FIG. 1 is a control flow diagram of the present invention.
Detailed Description
The invention is further described below with reference to the figures and examples.
An improved method for judging failure of a four-way valve of an air-cooled air conditioning unit is applied to the following air conditioning unit. The air conditioning unit comprises a refrigerant circulating system formed by connecting a compressor, an outdoor heat exchanger, an electronic expansion valve, an indoor heat exchanger and a gas-liquid separator; an outer plate temperature sensor is arranged on the outdoor heat exchanger; an inner plate temperature sensor is arranged on the indoor heat exchanger; an inner disc air inlet temperature sensor is arranged on the air inlet side of the indoor heat exchanger; the system also comprises an indoor environment temperature sensor arranged indoors and an outdoor environment temperature sensor arranged outdoors; outer dish temperature sensor, inner disc air inlet temperature sensor, indoor ambient temperature sensor and outdoor ambient temperature sensor all link to each other with air conditioning unit's controller electricity, can give the information transmission that each sensor sensing gives control. The controller also has a timing function.
As shown in fig. 1, the judging method includes the following steps:
1) starting up the unit to run, and starting timing by the controller;
2) if the mode is the refrigeration mode, turning to the step 3); if the mode is heating mode, go to step 5)
3) After the unit operates for 5 minutes, the outer plate temperature T of the outdoor heat exchanger is obtained through the outer plate temperature sensorwpAnd obtaining the outdoor environment temperature T through an outdoor environment temperature sensorw；
4) If T iswp-TwTurning to step 12) at the temperature of more than 5 ℃; otherwise, turning to step 13);
5) if the internal machine is a circulating fan set and the defrosting operation is not performed, turning to the step 6); if the internal machine is a brand new fan set and is not defrosted, turning to the step 8); if the defrosting operation is carried out, turning to the step 10);
6) after the unit is heated for 5 minutes or the defrosting exits from the heating operation for 5 minutes, the inner disc temperature T of the indoor heat exchanger is obtained through the inner disc temperature sensornpAnd obtaining the indoor environment temperature T through an indoor environment temperature sensorn；
7) If T isnp-TnTurning to step 12) at the temperature of more than 5 ℃; otherwise, go to step 13).
8) After the unit is heated for 5 minutes or the defrosting exits from the heating operation for 5 minutes, the inner disc temperature T of the indoor heat exchanger is obtained through the inner disc temperature sensornpAnd the air inlet temperature T of the inner disk is obtained by the air inlet temperature sensor of the inner disknpj；
9) If T isnp-TnpjTurning to step 12) at the temperature of more than 5 ℃; otherwise, go to step 13).
10) After the unit is defrosted for 4 minutes, the temperature T of the outer plate of the outdoor heat exchanger is acquired by the outer plate temperature sensorwpAnd obtaining the outdoor environment temperature T through an outdoor environment temperature sensorw；
11) If T iswp-TwTurning to step 12) at the temperature of more than 5 ℃; otherwise, turning to step 13);
12) judging that the four-way valve is normal, and continuing to operate the unit;
13) and (5) judging that the four-way valve fails, stopping the unit and reporting the fault.
The invention can not only carry out fault diagnosis on the failure of the four-way valve more comprehensively and accurately, but also cover more units and effectively improve the reliability of the operation of the units. Meanwhile, the device is low in cost, convenient to control and worthy of popularization.
The parts not involved in the present invention are the same as or can be implemented using the prior art.
Claims (1)
1. An improved method for judging failure of a four-way valve of an air-cooled air conditioning unit is characterized in that the air conditioning unit comprises a refrigerant circulating system formed by connecting a compressor, an outdoor heat exchanger, an electronic expansion valve, an indoor heat exchanger and a gas-liquid separator; an outer plate temperature sensor is arranged on the outdoor heat exchanger; an inner plate temperature sensor is arranged on the indoor heat exchanger; an inner disc air inlet temperature sensor is arranged on the air inlet side of the indoor heat exchanger; the system also comprises an indoor environment temperature sensor arranged indoors and an outdoor environment temperature sensor arranged outdoors; the outer disc temperature sensor, the inner disc air inlet temperature sensor, the indoor environment temperature sensor and the outdoor environment temperature sensor are electrically connected with a controller of the air conditioning unit; the controller is capable of timing;
the judging method comprises the following steps:
1) starting up the unit to run, and starting timing by the controller;
2) if the mode is the refrigeration mode, turning to the step 3); if the mode is heating mode, go to step 5)
3) After the unit operates for 5 minutes, the outer plate temperature T of the outdoor heat exchanger is obtained through the outer plate temperature sensorwpAnd obtaining the outdoor environment temperature T through an outdoor environment temperature sensorw；
4) If T iswp-TwTurning to step 12) at the temperature of more than 5 ℃; otherwise, turning to step 13);
5) if the internal machine is a circulating fan set and the defrosting operation is not performed, turning to the step 6); if the internal machine is a brand new fan set and is not defrosted, turning to the step 8); if the defrosting operation is carried out, turning to the step 10);
6) after the unit is heated for 5 minutes or the defrosting exits from the heating operation for 5 minutes, the inner disc temperature T of the indoor heat exchanger is obtained through the inner disc temperature sensornpAnd obtaining the indoor environment temperature T through an indoor environment temperature sensorn；
7) If T isnp-TnTurning to step 12) at the temperature of more than 5 ℃; otherwise, turning to step 13);
8) after the unit is heated for 5 minutes or the defrosting exits from the heating operation for 5 minutes, the inner disc temperature T of the indoor heat exchanger is obtained through the inner disc temperature sensornpAnd the air inlet temperature T of the inner disk is obtained by the air inlet temperature sensor of the inner disknpj；
9) If T isnp-TnpjTurning to step 12) at the temperature of more than 5 ℃; otherwise, turning to step 13);
10) after the unit is defrosted for 4 minutes, the temperature T of the outer plate of the outdoor heat exchanger is acquired by the outer plate temperature sensorwpAnd obtaining the outdoor environment temperature T through an outdoor environment temperature sensorw；
11) If T iswp-TwTurning to step 12) at the temperature of more than 5 ℃; otherwise, turning to step 13);
12) judging that the four-way valve is normal, and continuing to operate the unit;
13) and (5) judging that the four-way valve fails, stopping the unit and reporting the fault.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110045840.XA CN112611071A (en) | 2021-01-14 | 2021-01-14 | Improved method for judging failure of four-way valve of air-cooled air conditioning unit |
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| CN202110045840.XA CN112611071A (en) | 2021-01-14 | 2021-01-14 | Improved method for judging failure of four-way valve of air-cooled air conditioning unit |
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| CN112611071A true CN112611071A (en) | 2021-04-06 |
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| CN202110045840.XA Pending CN112611071A (en) | 2021-01-14 | 2021-01-14 | Improved method for judging failure of four-way valve of air-cooled air conditioning unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113685967A (en) * | 2021-09-02 | 2021-11-23 | 南京天加环境科技有限公司 | Method for accurately judging failure of four-way valve of air-cooled air conditioning unit |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09243138A (en) * | 1996-03-12 | 1997-09-16 | Fujitsu General Ltd | Method for controlling air conditioner |
| CN105928279A (en) * | 2016-05-05 | 2016-09-07 | 广东美的制冷设备有限公司 | Four-way valve fault detection method and device and air conditioner |
| CN109556232A (en) * | 2018-10-23 | 2019-04-02 | 珠海格力电器股份有限公司 | Four-way valve method for detecting abnormality, device and air-conditioner set |
| CN110715413A (en) * | 2019-10-16 | 2020-01-21 | 四川虹美智能科技有限公司 | Method for detecting running state of four-way valve and air conditioner |
| CN111023461A (en) * | 2019-12-31 | 2020-04-17 | 宁波奥克斯电气股份有限公司 | Detection control method and system of air conditioner, air conditioner and storage medium |
| CN111271821A (en) * | 2020-03-16 | 2020-06-12 | 珠海格力电器股份有限公司 | Four-way valve reversing abnormity control method, storage medium and air conditioner |
| CN111271820A (en) * | 2020-03-04 | 2020-06-12 | 南京天加环境科技有限公司 | Method for judging failure of four-way valve of air-cooled air conditioning unit |
| CN111706957A (en) * | 2020-05-25 | 2020-09-25 | 珠海格力电器股份有限公司 | Method and device for detecting reversing abnormality of four-way valve, storage medium and air conditioner |
-
2021
- 2021-01-14 CN CN202110045840.XA patent/CN112611071A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09243138A (en) * | 1996-03-12 | 1997-09-16 | Fujitsu General Ltd | Method for controlling air conditioner |
| CN105928279A (en) * | 2016-05-05 | 2016-09-07 | 广东美的制冷设备有限公司 | Four-way valve fault detection method and device and air conditioner |
| CN109556232A (en) * | 2018-10-23 | 2019-04-02 | 珠海格力电器股份有限公司 | Four-way valve method for detecting abnormality, device and air-conditioner set |
| CN110715413A (en) * | 2019-10-16 | 2020-01-21 | 四川虹美智能科技有限公司 | Method for detecting running state of four-way valve and air conditioner |
| CN111023461A (en) * | 2019-12-31 | 2020-04-17 | 宁波奥克斯电气股份有限公司 | Detection control method and system of air conditioner, air conditioner and storage medium |
| CN111271820A (en) * | 2020-03-04 | 2020-06-12 | 南京天加环境科技有限公司 | Method for judging failure of four-way valve of air-cooled air conditioning unit |
| CN111271821A (en) * | 2020-03-16 | 2020-06-12 | 珠海格力电器股份有限公司 | Four-way valve reversing abnormity control method, storage medium and air conditioner |
| CN111706957A (en) * | 2020-05-25 | 2020-09-25 | 珠海格力电器股份有限公司 | Method and device for detecting reversing abnormality of four-way valve, storage medium and air conditioner |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113685967A (en) * | 2021-09-02 | 2021-11-23 | 南京天加环境科技有限公司 | Method for accurately judging failure of four-way valve of air-cooled air conditioning unit |
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Application publication date: 20210406 |