CN113685967A - Method for accurately judging failure of four-way valve of air-cooled air conditioning unit - Google Patents
Method for accurately judging failure of four-way valve of air-cooled air conditioning unit Download PDFInfo
- Publication number
- CN113685967A CN113685967A CN202111025450.2A CN202111025450A CN113685967A CN 113685967 A CN113685967 A CN 113685967A CN 202111025450 A CN202111025450 A CN 202111025450A CN 113685967 A CN113685967 A CN 113685967A
- Authority
- CN
- China
- Prior art keywords
- way valve
- unit
- judging
- outdoor environment
- acquiring
- 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.)
- Pending
Links
- 238000004378 air conditioning Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 238000010977 unit operation Methods 0.000 claims description 4
- 238000010257 thawing Methods 0.000 claims description 3
- 238000005057 refrigeration Methods 0.000 abstract description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
Images
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Biomedical Technology (AREA)
- Health & Medical Sciences (AREA)
- Human Computer Interaction (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to a method for accurately judging the failure of a four-way valve of an air-cooled air conditioning unit, which can judge whether the four-way valve fails or not by detecting the temperature value of an inner disc of the unit in a refrigeration mode. In the heating operation mode, the outdoor temperature is first determined. When the outdoor environment temperature is higher, whether the four-way valve fails or not is judged by detecting the difference value between the outdoor environment temperature and the outer disc temperature; when the outdoor environment temperature is low, whether the four-way valve fails or not is judged by detecting the difference value between the outdoor environment temperature and the temperature of the outer disc and the high-pressure value. Therefore, the four-way valve judging method and the four-way valve judging device can adapt to all working conditions of the air conditioning unit, can effectively avoid the occurrence of four-way valve misjudgment under the low-temperature working condition, improve the judging accuracy and further improve the running reliability and stability of the unit.
Description
Technical Field
The invention relates to an air conditioner control method, in particular to a method for judging whether a four-way valve in an air conditioning unit fails, and particularly relates to a method for accurately judging the failure of the four-way valve of an air cooling air conditioning unit.
Background
When the air conditioning system operates, under the working condition of small high-low pressure difference, the situation that the sliding sheet in the four-way valve does not act in place due to insufficient high-low pressure difference can occur. In order to find out whether the four-way valve works abnormally in time, the difference between the temperature of a coil pipe of a heat exchanger and the ambient temperature is detected to judge at present. However, when the ambient temperature is particularly low, the difference between the temperature of the coil of the heat exchanger and the ambient temperature is small, so that the misjudgment phenomenon is easy to occur, and the normal operation of the unit is greatly influenced.
Therefore, improvements are needed to improve the judgment accuracy and meet the market demand better.
Disclosure of Invention
The invention aims to provide a method for accurately judging the failure of a four-way valve of an air-cooled air conditioning unit aiming at the defects of the prior art, which can effectively improve the accuracy of judging the abnormal working condition of the four-way valve, avoid the misjudgment under the conditions of low temperature and the like and improve the stability and the reliability of the operation of the unit.
The technical scheme of the invention is as follows:
a method for accurately judging failure of a four-way valve of an air-cooled air conditioning unit comprises the following steps:
1) starting the unit, and starting timing by the controller;
2) judging the unit operation mode: if so, turning to the step 3); if the heating mode is adopted, turning to the step 5);
3) after the unit operates for 5 minutes, acquiring the inner disc temperature Tnp of the indoor heat exchanger through an inner disc temperature sensor;
4) if Tnp is more than or equal to 45 ℃ and lasts for 10 minutes, judging that the four-way valve is invalid, and stopping the unit and reporting a fault; otherwise, judging that the four-way valve is normal, and continuing the operation of the unit;
5) judging whether the unit is in defrosting operation, if so, turning to step 6); if not, turning to step 8);
6) after running for 4 minutes, acquiring the outer disc temperature Twp of the outdoor heat exchanger through an outer disc temperature sensor, and acquiring the outdoor environment temperature Tw through an outdoor environment temperature sensor;
7) if the Twp-Tw is less than or equal to 5 ℃, the four-way valve is judged to be invalid, and the unit is shut down and reports faults; otherwise, judging that the four-way valve is normal, and continuing the operation of the unit;
8) acquiring an outdoor environment temperature Tw through an outdoor environment temperature sensor; if Tw > -10 ℃, go to step 9); otherwise, turning to step 11);
9) after the operation is carried out for 5 minutes, acquiring the outer disc temperature Twp of the outdoor heat exchanger through an outer disc temperature sensor, and acquiring the outdoor environment temperature Tw through an outdoor environment temperature sensor;
10) if the Tw-Twp is less than or equal to 0 ℃ and lasts for 5 minutes, judging that the four-way valve is invalid, and stopping the unit and reporting faults; otherwise, judging that the four-way valve is normal, and continuing the operation of the unit;
11) after 5 minutes of operation, the following tests were carried out: acquiring the outer plate temperature Twp of the outdoor heat exchanger through an outer plate temperature sensor; acquiring an outdoor environment temperature Tw through an outdoor environment temperature sensor; acquiring high-pressure HP of the unit through an outdoor high-pressure sensor;
12) if the Tw-Twp is less than or equal to 2.5 ℃, the HP is less than 8bar, and the temperature lasts for 10 minutes, the four-way valve is judged to be invalid, and the unit is shut down and reports faults; otherwise, the four-way valve is judged to be normal, and the unit continues to operate.
The invention has the beneficial effects that:
the four-way valve failure judgment method is reasonable in design, clear in logic and convenient to control, can enable the four-way valve failure judgment to be more accurate through collecting and comparing multiple indexes such as outdoor environment temperature, outer disc temperature and system high pressure according to changes of external temperature, can avoid misjudgment under low-temperature working conditions, and improves stability and reliability of unit operation.
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.
The invention discloses a method for accurately judging failure of a four-way valve of an air-cooled air conditioning unit, which is suitable for the air-cooled 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, a gas-liquid separator and the like. Meanwhile, an outer plate temperature sensor is arranged on the outdoor heat exchanger, so that the temperature of the outer plate of the outdoor heat exchanger can be detected in real time; a high-pressure sensor is arranged on the exhaust pipe of the outdoor unit, so that the high pressure of the system can be detected in real time; an inner plate temperature sensor is arranged on the indoor heat exchanger, so that the temperature of the inner plate of the indoor heat exchanger can be detected in real time; an outdoor ambient temperature sensor is arranged on an outdoor unit of the unit, and the outdoor temperature can be detected in real time. Outer dish temperature sensor, high pressure sensor, outdoor ambient temperature sensor and inner disc temperature sensor all link to each other with air conditioning unit's controller electrical property, can transmit detection information to controller. The controller also has a timing function.
As shown in fig. 1, the method for judging the failure of the four-way valve of the air-cooled air conditioning unit comprises the following steps:
1) starting the unit, and starting timing by the controller;
2) judging the unit operation mode: if so, turning to the step 3); if the heating mode is adopted, turning to the step 5);
3) after the unit operates for 5 minutes, acquiring the inner disc temperature Tnp of the indoor heat exchanger through an inner disc temperature sensor;
4) if Tnp is more than or equal to 45 ℃ and lasts for 10 minutes, judging that the four-way valve is invalid, and stopping the unit and reporting a fault; otherwise, judging that the four-way valve is normal, and continuing the operation of the unit;
5) judging whether the unit is in defrosting operation, if so, turning to step 6); if not, turning to step 8);
6) after running for 4 minutes, acquiring the outer disc temperature Twp of the outdoor heat exchanger through an outer disc temperature sensor, and acquiring the outdoor environment temperature Tw through an outdoor environment temperature sensor;
7) if the Twp-Tw is less than or equal to 5 ℃, the four-way valve is judged to be invalid, and the unit is shut down and reports faults; otherwise, judging that the four-way valve is normal, and continuing the operation of the unit;
8) acquiring an outdoor environment temperature Tw through an outdoor environment temperature sensor; if Tw > -10 ℃, go to step 9); otherwise, turning to step 11);
9) after the operation is carried out for 5 minutes, acquiring the outer disc temperature Twp of the outdoor heat exchanger through an outer disc temperature sensor, and acquiring the outdoor environment temperature Tw through an outdoor environment temperature sensor;
10) if the Tw-Twp is less than or equal to 0 ℃ and lasts for 5 minutes, judging that the four-way valve is invalid, and stopping the unit and reporting faults; otherwise, judging that the four-way valve is normal, and continuing the operation of the unit;
11) after 5 minutes of operation, the following tests were carried out: acquiring the outer plate temperature Twp of the outdoor heat exchanger through an outer plate temperature sensor; acquiring an outdoor environment temperature Tw through an outdoor environment temperature sensor; acquiring high-pressure HP of the unit through an outdoor high-pressure sensor;
12) if the Tw-Twp is less than or equal to 2.5 ℃, the HP is less than 8bar, and the temperature lasts for 10 minutes, the four-way valve is judged to be invalid, and the unit is shut down and reports faults; otherwise, the four-way valve is judged to be normal, and the unit continues to operate.
The invention can make the air-cooled air conditioning unit judge whether the four-way valve fails or not by detecting the temperature value of the inner disc in the refrigeration mode. In the heating operation mode, the outdoor temperature is first determined. When the outdoor environment temperature is higher, whether the four-way valve fails or not is judged by detecting the difference value between the outdoor environment temperature and the outer disc temperature; when the outdoor environment temperature is low, whether the four-way valve fails or not is judged by detecting the difference value between the outdoor environment temperature and the temperature of the outer disc and the high-pressure value. Therefore, the four-way valve judging method and the four-way valve judging device can adapt to all working conditions of the air conditioning unit, can effectively avoid the occurrence of four-way valve misjudgment under the low-temperature working condition, improve the judging accuracy, and effectively improve the running reliability and stability of the unit.
The parts not involved in the present invention are the same as or can be implemented using the prior art.
Claims (1)
1. A method for accurately judging failure of a four-way valve of an air-cooled air conditioning unit is characterized by comprising the following steps:
1) starting the unit, and starting timing by the controller;
2) judging the unit operation mode: if so, turning to the step 3); if the heating mode is adopted, turning to the step 5);
3) after the unit operates for 5 minutes, acquiring the inner disc temperature Tnp of the indoor heat exchanger through an inner disc temperature sensor;
4) if Tnp is more than or equal to 45 ℃ and lasts for 10 minutes, judging that the four-way valve is invalid, and stopping the unit and reporting a fault; otherwise, judging that the four-way valve is normal, and continuing the operation of the unit;
5) judging whether the unit is in defrosting operation, if so, turning to step 6); if not, turning to step 8);
6) after running for 4 minutes, acquiring the outer disc temperature Twp of the outdoor heat exchanger through an outer disc temperature sensor, and acquiring the outdoor environment temperature Tw through an outdoor environment temperature sensor;
7) if the Twp-Tw is less than or equal to 5 ℃, the four-way valve is judged to be invalid, and the unit is shut down and reports faults; otherwise, judging that the four-way valve is normal, and continuing the operation of the unit;
8) acquiring an outdoor environment temperature Tw through an outdoor environment temperature sensor; if Tw > -10 ℃, go to step 9); otherwise, turning to step 11);
9) after the operation is carried out for 5 minutes, acquiring the outer disc temperature Twp of the outdoor heat exchanger through an outer disc temperature sensor, and acquiring the outdoor environment temperature Tw through an outdoor environment temperature sensor;
10) if the Tw-Twp is less than or equal to 0 ℃ and lasts for 5 minutes, judging that the four-way valve is invalid, and stopping the unit and reporting faults; otherwise, judging that the four-way valve is normal, and continuing the operation of the unit;
11) after 5 minutes of operation, the following tests were carried out: acquiring the outer plate temperature Twp of the outdoor heat exchanger through an outer plate temperature sensor; acquiring an outdoor environment temperature Tw through an outdoor environment temperature sensor; acquiring high-pressure HP of the unit through an outdoor high-pressure sensor;
12) if the Tw-Twp is less than or equal to 2.5 ℃, the HP is less than 8bar, and the temperature lasts for 10 minutes, the four-way valve is judged to be invalid, and the unit is shut down and reports faults; otherwise, the four-way valve is judged to be normal, and the unit continues to operate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111025450.2A CN113685967A (en) | 2021-09-02 | 2021-09-02 | Method for accurately judging failure of four-way valve of air-cooled air conditioning unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111025450.2A CN113685967A (en) | 2021-09-02 | 2021-09-02 | Method for accurately judging failure of four-way valve of air-cooled air conditioning unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113685967A true CN113685967A (en) | 2021-11-23 |
Family
ID=78584955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111025450.2A Pending CN113685967A (en) | 2021-09-02 | 2021-09-02 | Method for accurately judging failure of four-way valve of air-cooled air conditioning unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113685967A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103104962A (en) * | 2013-02-27 | 2013-05-15 | 四川长虹空调有限公司 | Method for detecting four-way valve of air-conditioner |
| CN105928278A (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 |
| CN110107983A (en) * | 2019-05-05 | 2019-08-09 | 珠海格力电器股份有限公司 | Air-conditioner set and its four-way valve commutation states detection method, device, system |
| 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 |
| 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 |
-
2021
- 2021-09-02 CN CN202111025450.2A patent/CN113685967A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103104962A (en) * | 2013-02-27 | 2013-05-15 | 四川长虹空调有限公司 | Method for detecting four-way valve of air-conditioner |
| CN105928278A (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 |
| CN110107983A (en) * | 2019-05-05 | 2019-08-09 | 珠海格力电器股份有限公司 | Air-conditioner set and its four-way valve commutation states detection method, device, system |
| 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 |
| 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100476323C (en) | Diagnosing a loss of refrigerant charge in a refrigerant system | |
| WO2021073098A1 (en) | Fixed-frequency air conditioner refrigerant-deficient protection method | |
| CN111271820A (en) | Method for judging failure of four-way valve of air-cooled air conditioning unit | |
| CN108317662B (en) | Fault detection method and device, air conditioner and computer readable storage medium | |
| CN101876474A (en) | Method for automatically detecting lack of refrigerant in air-conditioner | |
| CN105091215A (en) | Fluorine lack start-up detection method and device for multi-split air-conditioner | |
| CN108224849B (en) | Oil return control method for air conditioner | |
| US10941956B2 (en) | Data processing method, refrigerant leakage detection method, system failure detection method and system performance detection method | |
| CN109282423B (en) | Method for detecting communication connection error of heat recovery multi-split air conditioning system and heat recovery multi-split air conditioning system | |
| CN103575514A (en) | Air conditioner and detection method and device thereof | |
| CN105674507A (en) | Method and device for detecting refrigerants of air conditioner | |
| CN110645671A (en) | Air conditioner high temperature prevention control method and device and air conditioner | |
| CN110940091B (en) | Fluorine deficiency judgment method and heat pump water heater | |
| CN110906505A (en) | Air conditioner refrigerant leakage detection method and air conditioner | |
| CN112393377A (en) | Fault judgment method and air conditioner | |
| CN103557578A (en) | Protection method for lack of fluorine of air-cooled module type cold hot water unit | |
| CN114251782B (en) | Electronic expansion valve abnormality detection method and device and air conditioner | |
| CN112696791A (en) | Rail vehicle air conditioning unit refrigerant leakage early warning method | |
| CN110173816B (en) | Detection method and detection device for air conditioner refrigerant leakage | |
| CN113685967A (en) | Method for accurately judging failure of four-way valve of air-cooled air conditioning unit | |
| CN112611071A (en) | Improved method for judging failure of four-way valve of air-cooled air conditioning unit | |
| CN107560105B (en) | Method and device for judging connection pipe error of four-way valve and machine readable storage medium | |
| CN110926544B (en) | Detection equipment for heat exchanger unit and online automatic detection method thereof | |
| CN111692703B (en) | Fault detection method for air conditioning system | |
| CN109520165B (en) | Air conditioning unit and four-way valve fault detection method 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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211123 |
|
| RJ01 | Rejection of invention patent application after publication |