CN112556089B - Wiring error detection method of air conditioning system - Google Patents
Wiring error detection method of air conditioning system Download PDFInfo
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- CN112556089B CN112556089B CN202011414376.9A CN202011414376A CN112556089B CN 112556089 B CN112556089 B CN 112556089B CN 202011414376 A CN202011414376 A CN 202011414376A CN 112556089 B CN112556089 B CN 112556089B
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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
- F24F11/52—Indication arrangements, e.g. displays
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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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Abstract
The invention relates to the technical field of air conditioners, aims to solve the problems of low efficiency and poor accuracy of the existing wiring error detection method of an air conditioning system, and provides a wiring error detection method of an air conditioning system, which comprises the following steps: step 1, after a preset detection condition is reached, acquiring a first opening change value of a first electronic expansion valve, a second opening change value of a second electronic expansion valve, a first temperature difference change value of a first temperature difference and a second temperature difference change value of a second temperature difference in a preset time period; and 2, judging whether the wiring of the first electronic expansion valve and the second electronic expansion valve, the first temperature sensor and the second temperature sensor, and the wiring of the third temperature sensor and the fourth temperature sensor are wrong or not according to the first opening degree change value, the second opening degree change value, the first temperature difference change value and the second temperature difference change value. The invention improves the efficiency and the accuracy of wiring error detection, and is suitable for an air-conditioning system with double electronic expansion valves.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a wiring error detection method of an air conditioning system.
Background
The throttle mechanism is a key component for realizing the functions of a compression type air conditioning system, and an electronic expansion valve is gradually and frequently adopted as the throttle mechanism in the existing air conditioning system to improve the capacity and the energy efficiency of the system. Especially in the frequency conversion multiple on-line system, in order to adjust the refrigerant flow more precisely and meet the requirement of the large capacity single-machine system, two or more electronic expansion valves may be connected in parallel as a throttling mechanism in a single refrigeration system, and the two electronic expansion valves are controlled independently. For the requirement of cost, the electronic expansion valves are connected with the control main board by the same wiring ports. Likewise, the temperature sensors used for electronic expansion valve control also use the same interface, at best, only color differences are made. Therefore, in the production process, the electronic expansion valve and the temperature sensor are easily inserted into wrong interfaces. The higher probability of occurrence is that the mutual interfaces of the two electronic expansion valves are inserted reversely, or the sensors for controlling the electronic expansion valves are inserted reversely, so that the air conditioning system is in failure or the capacity and the energy efficiency are reduced.
In the prior art, whether the wiring of the air conditioning system is wrong or not is usually detected by adopting a manual method, and the efficiency and the accuracy are not high.
Disclosure of Invention
The invention aims to solve the problems of low efficiency and poor accuracy of the existing wiring error detection method of the air conditioning system, and provides a wiring error detection method of the air conditioning system.
The technical scheme adopted by the invention for solving the technical problems is as follows: a wiring error detection method of an air conditioning system, wherein the air conditioning system comprises a first electronic expansion valve, a second electronic expansion valve, a first temperature sensor, a second temperature sensor, a third temperature sensor and a fourth temperature sensor, the opening degree of the first electronic expansion valve is adjusted according to a first temperature difference of the first temperature sensor and the second temperature sensor, the opening degree of the second electronic expansion valve is adjusted according to a second temperature difference of the third temperature sensor and the fourth temperature sensor, and the method comprises the following steps:
step 1, after a preset detection condition is reached, acquiring a first opening change value of a first electronic expansion valve, a second opening change value of a second electronic expansion valve, a first temperature difference change value of a first temperature difference and a second temperature difference change value of a second temperature difference in a preset time period;
and 2, judging whether the wiring of the first electronic expansion valve and the second electronic expansion valve, the first temperature sensor and the second temperature sensor, and the wiring of the third temperature sensor and the fourth temperature sensor are wrong or not according to the first opening degree change value, the second opening degree change value, the first temperature difference change value and the second temperature difference change value.
Further, the step 2 comprises:
if the first opening degree variation value is greater than or equal to a first preset value, the second opening degree variation value is less than or equal to a second preset value, the first temperature difference variation value is greater than a third preset value, and the second temperature difference variation value is less than a fourth preset value, or
And if the first opening degree change value is smaller than or equal to a second preset value, the second opening degree change value is larger than or equal to a first preset value, the first temperature difference change value is smaller than a fourth preset value, and the second temperature difference change value is larger than a third preset value, the connection error of the first electronic expansion valve and the second electronic expansion valve is judged, the first preset value is larger than the second preset value, and the third preset value is larger than the fourth preset value.
Further, the step 2 further comprises:
if the first opening degree change value is greater than or equal to a first preset value, the second opening degree change value is less than or equal to a second preset value, the first temperature difference change value is greater than a third preset value, and the second temperature difference change value is greater than or equal to a fourth preset value, or
And if the first opening degree change value is smaller than or equal to a second preset value, the second opening degree change value is larger than or equal to a first preset value, and the first temperature difference change value and the second temperature difference change value are both larger than a third preset value, the wiring errors of the first temperature sensor and the second temperature sensor are judged.
Further, the step 2 further comprises:
if the first opening degree change value is greater than or equal to a first preset value, the second opening degree change value is less than or equal to a second preset value, and the first temperature difference change value and the second temperature difference change value are both less than a fourth preset value, or
And if the first opening degree change value is smaller than or equal to a second preset value, the second opening degree change value is larger than or equal to a first preset value, the first temperature difference change value is smaller than a fourth preset value, and the second temperature difference change value is smaller than or equal to a third preset value, the wiring error of the third temperature sensor and the fourth temperature sensor is judged.
Further, the step 2 further comprises:
and if the first opening degree change value is larger than or equal to a first preset value, the second opening degree change value is smaller than or equal to a second preset value, the first temperature difference change value is larger than or equal to a fourth preset value and smaller than or equal to a third preset value, and the second temperature difference change value is smaller than the fourth preset value, judging that the wiring of the third temperature sensor and the fourth temperature sensor is wrong or the wiring of the first electronic expansion valve and the second electronic expansion valve is wrong.
Further, the step 2 further comprises:
and if the first opening degree change value is smaller than or equal to a second preset value, the second opening degree change value is larger than or equal to a first preset value, the first temperature difference change value is larger than or equal to a fourth preset value and smaller than or equal to a third preset value, and the second temperature difference change value is larger than the third preset value, judging that the wiring of the first temperature sensor and the second temperature sensor is wrong or the wiring of the first electronic expansion valve and the second electronic expansion valve is wrong.
Further, the step 2 further comprises:
if the first opening degree variation value is greater than or equal to a first preset value, the second opening degree variation value is less than or equal to a second preset value, the first temperature difference variation value is less than a fourth preset value, and the second temperature difference variation value is greater than a third preset value, or
And if the first opening degree change value is smaller than or equal to a second preset value, the second opening degree change value is larger than or equal to a first preset value, the first temperature difference change value is larger than a third preset value, and the second temperature difference change value is smaller than a fourth preset value, the wiring of the first electronic expansion valve and the second electronic expansion valve, the first temperature sensor and the second temperature sensor, and the wiring of the third temperature sensor and the wiring of the fourth temperature sensor are judged to be correct.
Further, the first preset value is 50, the second preset value is-50, the third preset value is greater than 1, and the fourth preset value is greater than or equal to-1 and less than or equal to-0.2.
Further, the preset detection conditions include: and the difference value of the valve opening steps of the first electronic expansion valve and the second electronic expansion valve is greater than a fifth preset value.
Further, the method also comprises the following steps:
setting a judgment identifier, resetting the judgment identifier to be 0 after the electronic expansion valve or the temperature sensor of the air conditioning system is reconnected, adding 1 to the judgment identifier after finishing a judgment process, and presetting detection conditions which further comprise: and the judgment identification is less than or equal to a sixth preset value.
The invention has the beneficial effects that: according to the wiring error detection method of the air conditioning system, the wiring error in the air conditioning system is detected through the opening degree change of the electronic expansion valve and the change of the temperature difference detected by the temperature sensor, so that the efficiency and the accuracy of the wiring error detection are improved, the reduction of the air conditioning energy efficiency caused by the failure of the air conditioning system is avoided, and the normal operation of the air conditioning system is ensured.
Drawings
Fig. 1 is a schematic flow chart illustrating a wiring error detection method of an air conditioning system according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
The invention provides a wiring error detection method of an air conditioning system aiming at the air conditioning system comprising two electronic expansion valves and four temperature sensors, so as to realize the detection of the wiring error, namely, the air conditioning system comprises a first electronic expansion valve, a second electronic expansion valve, a first temperature sensor, a second temperature sensor, a third temperature sensor and a fourth temperature sensor, wherein the first electronic expansion valve adjusts the opening degree according to the first temperature difference of the first temperature sensor and the second temperature sensor, and the second electronic expansion valve adjusts the opening degree according to the second temperature difference of the third temperature sensor and the fourth temperature sensor, and the method comprises the following steps: when a preset detection condition is reached, acquiring a first opening change value of a first electronic expansion valve, a second opening change value of a second electronic expansion valve, a first temperature difference change value of a first temperature difference and a second temperature difference change value of a second temperature difference in a preset time period; and judging whether the wiring of the first electronic expansion valve and the second electronic expansion valve, the first temperature sensor and the second temperature sensor, and the wiring of the third temperature sensor and the fourth temperature sensor are wrong or not according to the first opening degree change value, the second opening degree change value, the first temperature difference change value and the second temperature difference change value.
Specifically, after the preset detection condition is reached, a judgment process is entered, and the judgment process is as follows: firstly, the opening degree value of the first electronic expansion valve, the opening degree value of the second electronic expansion valve, the temperature difference of the temperature values detected by the first temperature sensor and the second temperature sensor, and the temperature difference of the temperature values detected by the third temperature sensor and the fourth temperature sensor can be respectively recorded at the current moment and the previous moment, and then the first opening degree change value of the first electronic expansion valve, the second opening degree change value of the second electronic expansion valve, the first temperature difference change value of the first temperature difference and the second temperature difference change value of the second temperature difference in a preset time period can be obtained according to the corresponding temperature difference of the data at the current moment and the previous moment; and finally, judging whether the wiring of the first electronic expansion valve and the second electronic expansion valve, the first temperature sensor and the second temperature sensor, and the wiring of the third temperature sensor and the fourth temperature sensor are wrong or not according to the first opening degree change value, the second opening degree change value, the first temperature difference change value and the second temperature difference change value.
Examples
An air conditioning system according to an embodiment of the present invention includes a first electronic expansion valve, a second electronic expansion valve, a first temperature sensor, a second temperature sensor, a third temperature sensor, and a fourth temperature sensor, where the first electronic expansion valve adjusts an opening degree according to a first temperature difference between the first temperature sensor and the second temperature sensor, and the second electronic expansion valve adjusts an opening degree according to a second temperature difference between the third temperature sensor and the fourth temperature sensor, and the method for detecting a connection error of an air conditioning system according to this embodiment includes, as shown in fig. 1, the following steps:
step S1, when a preset detection condition is reached, acquiring a first opening degree change value of the first electronic expansion valve, a second opening degree change value of the second electronic expansion valve, a first temperature difference change value of the first temperature difference and a second temperature difference change value of the second temperature difference in a preset time period;
firstly, whether a preset detection condition is reached is judged, if yes, a judgment flow is entered, and in this embodiment, the preset detection condition may include: the difference value of the valve opening steps of the first electronic expansion valve and the second electronic expansion valve is larger than a fifth preset value, namely | S1T-S2T| is greater than q; wherein S is1TOpening degree of the first electronic expansion valve, S2TAnd q is a fifth preset value, which is the opening degree of the second electronic expansion valve, so as to avoid the air conditioning system from entering the judgment process frequently, in this embodiment, q is greater than or equal to 150.
Enter a judgment streamAfter the process, recording the opening S of the first electronic expansion valve at the time T1TOpening degree S of second electronic expansion valve2TControl value A of the first electronic expansion valveTA control value B of the second electronic expansion valveTWherein the control value A of the first electronic expansion valveTA control value B of the second electronic expansion valve for the temperature difference between the temperatures detected by the first temperature sensor and the second temperature sensorTIs the difference in temperature between the temperatures detected by the third temperature sensor and the fourth temperature sensor.
Recording the opening S of the first electronic expansion valve at the moment T +11T+1Opening degree S of second electronic expansion valve2T+1Control value A of the first electronic expansion valveT+1A control value B of the second electronic expansion valveT+1. Wherein, the time T and the time T +1 form a preset time period.
Calculating a first opening change value deltaS of the first electronic expansion valve from the time T to the time T +11＝S1T+1-S1TSecond opening degree change value deltaS of second electronic expansion valve2＝S2T+1-S2TFirst temperature difference variation value delta A1＝AT+1-ATSecond value of temperature difference change δ B1＝BT+1-BT。
Step S2, according to the first opening degree change value Delta S1Second opening degree variation value DeltaS2The first temperature difference change value delta A1And a second temperature difference change value deltaB1And judging whether the wiring of the first electronic expansion valve and the second electronic expansion valve, the first temperature sensor and the second temperature sensor, and the third temperature sensor and the fourth sensor is wrong or not.
In order to specifically determine the wiring error, the specific determination rule of this embodiment is as follows:
in the table, P1 indicates a wiring error of the first temperature sensor and the second temperature sensor, P2 indicates a wiring error of the third temperature sensor and the fourth temperature sensor, F indicates a wiring error of the first electronic expansion valve and the second electronic expansion valve, and Normal indicates that the first electronic expansion valve and the second electronic expansion valve, the first temperature sensor and the second temperature sensor, and the third temperature sensor and the fourth sensor are correctly wired.
Specifically, when the determination process is executed, if the first opening change value is greater than or equal to a first preset value, the second opening change value is less than or equal to a second preset value, the first temperature difference change value is greater than a third preset value m, and the second temperature difference change value is less than a fourth preset value n, or if the first opening change value is less than or equal to the second preset value, the second opening change value is greater than or equal to the first preset value, the first temperature difference change value is less than the fourth preset value n, and the second temperature difference change value is greater than the third preset value m, it is determined that the first electronic expansion valve and the second electronic expansion valve are connected incorrectly, where the first preset value is greater than the second preset value, and the third preset value m is greater than the fourth preset value n.
If the first opening change value is larger than or equal to a first preset value, the second opening change value is smaller than or equal to a second preset value, the first temperature difference change value is larger than a third preset value m, the second temperature difference change value is larger than or equal to a fourth preset value n, or if the first opening change value is smaller than or equal to the second preset value, the second opening change value is larger than or equal to the first preset value, and both the first temperature difference change value and the second temperature difference change value are larger than the third preset value m, the wiring error of the first temperature sensor and the second temperature sensor is judged.
And if the first opening change value is larger than or equal to a first preset value, the second opening change value is smaller than or equal to a second preset value, and the first temperature difference change value and the second temperature difference change value are both smaller than a fourth preset value n, or if the first opening change value is smaller than or equal to the second preset value, the second opening change value is larger than or equal to the first preset value, the first temperature difference change value is smaller than the fourth preset value n, and the second temperature difference change value is smaller than or equal to a third preset value m, the wiring error of the third temperature sensor and the fourth temperature sensor is judged.
And if the first opening degree change value is larger than or equal to a first preset value, the second opening degree change value is smaller than or equal to a second preset value, the first temperature difference change value is larger than or equal to a fourth preset value n and smaller than or equal to a third preset value m, and the second temperature difference change value is smaller than the fourth preset value n, judging that the wiring of the third temperature sensor and the fourth sensor is wrong or the wiring of the first electronic expansion valve and the second electronic expansion valve is wrong.
And if the first opening degree change value is smaller than or equal to a second preset value, the second opening degree change value is larger than or equal to a first preset value, the first temperature difference change value is larger than or equal to a fourth preset value n and smaller than or equal to a third preset value m, and the second temperature difference change value is larger than the third preset value m, judging that the wiring of the first temperature sensor and the second sensor is wrong or the wiring of the first electronic expansion valve and the second electronic expansion valve is wrong.
And if the first opening degree change value is larger than or equal to a first preset value, the second opening degree change value is smaller than or equal to a second preset value, the first temperature difference change value is smaller than a fourth preset value n, the second temperature difference change value is larger than a third preset value m, or if the first opening degree change value is smaller than or equal to the second preset value, the second opening degree change value is larger than or equal to the first preset value, the first temperature difference change value is larger than the third preset value m, and the second temperature difference change value is smaller than the fourth preset value n, the wiring of the first electronic expansion valve and the second electronic expansion valve, the first temperature sensor and the second temperature sensor, and the third temperature sensor and the fourth sensor is judged to be correct.
Referring to the above table, the present embodiment does not determine whether the wiring of the first and second electronic expansion valves, the first and second temperature sensors, and the third and fourth temperature sensors is erroneous in the remaining cases.
In order to improve the accuracy of the determination, in this embodiment, the first preset value is 50, the second preset value is-50, the third preset value m is greater than 1, and the fourth preset value n is greater than or equal to-1 and less than or equal to-0.2.
In this embodiment, a wiring error of the first temperature sensor and the second temperature sensor may indicate that the first temperature sensor and the second temperature sensor are reversely wired, a wiring error of the third temperature sensor and the fourth temperature sensor may indicate that the third temperature sensor and the fourth temperature sensor are reversely wired, and a wiring error of the first electronic expansion valve and the second electronic expansion valve may indicate that the first electronic expansion valve and the second electronic expansion valve are reversely wired.
In order to avoid the frequent entering of the air conditioning system into the determination process, the present embodiment further includes: setting a judgment identifier, resetting the judgment identifier to be 0 after the electronic expansion valve or the temperature sensor of the air conditioning system is reconnected, adding 1 to the judgment identifier after finishing a judgment process, and presetting detection conditions which further comprise: and the judgment identification is less than or equal to a sixth preset value.
Specifically, the wiring error of the air conditioning system can be detected according to a preset period, the judgment identifier is 0 before the judgment process is executed for the first time, the judgment identifier is increased by 1 after the judgment process is executed each time, and the judgment identifier is reset to 0 after the electronic expansion valve or the temperature sensor of the air conditioning system is reconnected. Before executing the judgment process each time, whether the judgment mark is smaller than or equal to a sixth preset value or not is detected, if so, the next judgment process is executed when the difference value of the valve opening steps of the first electronic expansion valve and the second electronic expansion valve is larger than a fifth preset value, and otherwise, the judgment process is not executed. In this embodiment, in order to avoid unnecessary multiple judgments and ensure the accuracy of the judgments, the sixth preset value is preferably 5.
Claims (10)
1. The wiring error detection method of the air conditioning system comprises a first electronic expansion valve, a second electronic expansion valve, a first temperature sensor, a second temperature sensor, a third temperature sensor and a fourth temperature sensor, wherein the first electronic expansion valve adjusts the opening degree according to the first temperature difference of the first temperature sensor and the second temperature sensor, and the second electronic expansion valve adjusts the opening degree according to the second temperature difference of the third temperature sensor and the fourth temperature sensor, and is characterized by comprising the following steps of:
step 1, after a preset detection condition is reached, acquiring a first opening change value of a first electronic expansion valve, a second opening change value of a second electronic expansion valve, a first temperature difference change value of a first temperature difference and a second temperature difference change value of a second temperature difference in a preset time period;
and 2, judging the wiring errors of the first electronic expansion valve and the second electronic expansion valve, the first temperature sensor and the second temperature sensor or the third temperature sensor and the fourth sensor according to the first opening degree change value, the second opening degree change value, the first temperature difference change value and the second temperature difference change value, and judging the wiring correctness of the first electronic expansion valve and the second electronic expansion valve, the first temperature sensor and the second temperature sensor, and the third temperature sensor and the fourth sensor according to the first opening degree change value, the second opening degree change value, the first temperature difference change value and the second temperature difference change value.
2. The wiring error detection method of an air conditioning system as claimed in claim 1, wherein said step 2 comprises:
if the first opening degree variation value is greater than or equal to a first preset value, the second opening degree variation value is less than or equal to a second preset value, the first temperature difference variation value is greater than a third preset value, and the second temperature difference variation value is less than a fourth preset value, or
And if the first opening degree change value is smaller than or equal to a second preset value, the second opening degree change value is larger than or equal to a first preset value, the first temperature difference change value is smaller than a fourth preset value, and the second temperature difference change value is larger than a third preset value, the connection error of the first electronic expansion valve and the second electronic expansion valve is judged, the first preset value is larger than the second preset value, and the third preset value is larger than the fourth preset value.
3. The wiring error detection method of an air conditioning system as set forth in claim 2, wherein said step 2 further comprises:
if the first opening degree change value is greater than or equal to a first preset value, the second opening degree change value is less than or equal to a second preset value, the first temperature difference change value is greater than a third preset value, and the second temperature difference change value is greater than or equal to a fourth preset value, or
And if the first opening degree change value is smaller than or equal to a second preset value, the second opening degree change value is larger than or equal to a first preset value, and the first temperature difference change value and the second temperature difference change value are both larger than a third preset value, the wiring errors of the first temperature sensor and the second temperature sensor are judged.
4. The wiring error detection method of an air conditioning system as set forth in claim 2, wherein said step 2 further comprises:
if the first opening degree change value is greater than or equal to a first preset value, the second opening degree change value is less than or equal to a second preset value, and the first temperature difference change value and the second temperature difference change value are both less than a fourth preset value, or
And if the first opening degree change value is smaller than or equal to a second preset value, the second opening degree change value is larger than or equal to a first preset value, the first temperature difference change value is smaller than a fourth preset value, and the second temperature difference change value is smaller than or equal to a third preset value, the wiring error of the third temperature sensor and the fourth temperature sensor is judged.
5. The wiring error detection method of an air conditioning system as set forth in claim 2, wherein said step 2 further comprises:
and if the first opening degree change value is larger than or equal to a first preset value, the second opening degree change value is smaller than or equal to a second preset value, the first temperature difference change value is larger than or equal to a fourth preset value and smaller than or equal to a third preset value, and the second temperature difference change value is smaller than the fourth preset value, judging that the wiring of the third temperature sensor and the fourth temperature sensor is wrong or the wiring of the first electronic expansion valve and the second electronic expansion valve is wrong.
6. The wiring error detection method of an air conditioning system as set forth in claim 2, wherein said step 2 further comprises:
and if the first opening degree change value is smaller than or equal to a second preset value, the second opening degree change value is larger than or equal to a first preset value, the first temperature difference change value is larger than or equal to a fourth preset value and smaller than or equal to a third preset value, and the second temperature difference change value is larger than the third preset value, judging that the wiring of the first temperature sensor and the second temperature sensor is wrong or the wiring of the first electronic expansion valve and the second electronic expansion valve is wrong.
7. The wiring error detection method of an air conditioning system as set forth in claim 2, wherein said step 2 further comprises:
if the first opening degree variation value is greater than or equal to a first preset value, the second opening degree variation value is less than or equal to a second preset value, the first temperature difference variation value is less than a fourth preset value, and the second temperature difference variation value is greater than a third preset value, or
And if the first opening degree change value is smaller than or equal to a second preset value, the second opening degree change value is larger than or equal to a first preset value, the first temperature difference change value is larger than a third preset value, and the second temperature difference change value is smaller than a fourth preset value, the wiring of the first electronic expansion valve and the second electronic expansion valve, the first temperature sensor and the second temperature sensor, and the wiring of the third temperature sensor and the wiring of the fourth temperature sensor are judged to be correct.
8. The wiring error detection method of an air conditioning system as claimed in any one of claims 2 to 7, wherein the first preset value is 50, the second preset value is-50, the third preset value is greater than 1, and the fourth preset value is greater than or equal to-1 and less than or equal to-0.2.
9. The wiring error detection method of an air conditioning system as claimed in claim 1, wherein the preset detection condition includes: and the difference value of the valve opening steps of the first electronic expansion valve and the second electronic expansion valve is greater than a fifth preset value.
10. The wiring error detection method of an air conditioning system as claimed in claim 9, further comprising:
setting a judgment identifier, resetting the judgment identifier to be 0 after the electronic expansion valve or the temperature sensor of the air conditioning system is reconnected, adding 1 to the judgment identifier after finishing a judgment process, and presetting detection conditions which further comprise: and the judgment identification is less than or equal to a sixth preset value.
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| CN105021381A (en) * | 2014-04-30 | 2015-11-04 | 广东美的暖通设备有限公司 | Air conditioner electronic expansion valve fault detection method and apparatus |
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| KR100743718B1 (en) * | 2005-09-15 | 2007-07-30 | 엘지전자 주식회사 | Process for confirming wrong connect wire and bad temperature sensor of pipe in multi type air conditioner |
| CN103913669A (en) * | 2014-04-18 | 2014-07-09 | 广东美的暖通设备有限公司 | Wiring error detection method and device and heating and ventilation device |
| CN105021381A (en) * | 2014-04-30 | 2015-11-04 | 广东美的暖通设备有限公司 | Air conditioner electronic expansion valve fault detection method and apparatus |
| CN107631407A (en) * | 2017-09-11 | 2018-01-26 | 广东美的暖通设备有限公司 | The wiring faults detection method and device of air conditioner, air conditioner |
| CN111043727A (en) * | 2019-12-30 | 2020-04-21 | Tcl空调器(中山)有限公司 | Temperature sensing bulb fault detection method and device, air conditioner and computer storage medium |
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