Detection and self-repair control method of temperature sensor error in dual-compressor air-conditioning system

Abstract

The invention discloses a dislocation detecting and self-repairing control method for temperature detectors of a dual-compressor air conditioning system. The method comprises the steps that a, a control circuit is set up; b, a unit is started to operate for a minutes, one compressor (12) is started, the other compressor (12) is shut down, judgment is carried out, if one of the following two conditions is met, inserting dislocation of the temperature detectors is judged, according to the condition 1, detection is carried out once every b minutes, the exhaust temperature of the compressor (12) which is not started is increased by m DEG C or above, meanwhile, the exhaust temperature of the started compressor (12) is decreased by n DEG C or above, and according to the condition 2, the shutdown time of the compressors (12) exceeds c minutes, and the exhaust temperature of the compressors (12) is larger than or equal to z DEG C; and c, a master controller (1) turns on two normally open switches and turns off two normally closed switches. According to the method, whether inserting dislocation of the temperature detectors happens or not can be detected fast and accurately, and the dislocated temperature detectors can be automatically corrected to the correct compressors (12).

Description

technical field [0001] The invention relates to the field of air conditioning, in particular to a detection and self-repairing control method for temperature sensor error in a dual-compressor air conditioning system. Background technique [0002] Multi-connected air conditioner units often require one outdoor unit to drive multiple indoor units, and the load is relatively large, so two compressors are often installed, and a temperature sensor is installed at the exhaust port of each compressor to measure the temperature of the compressor. exhaust temperature. Due to the large number of components in the air conditioning system with dual compressors, it is inevitable that the corresponding temperature sensors of the two compressors are inserted backwards during the production and maintenance process. The compressor discharge temperature measured by the above-mentioned temperature sensor is an important parameter for regulating the operation of the air conditioner. Once it is...

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Problems solved by technology

The compressor discharge temperature measured by the above-mentioned temperature sensor is an important parameter to control the operation of the air conditioner. Once it is inserted backwards, it will inevitably lead to abnormal operation of the air conditioner system and affect the user experience.

[0003] Moreover, just because the multi-connected system is huge and there are many components, there are various reasons for the failure of the unit, such as insufficient fan speed of the external unit and internal unit, blockage of the coil of the heat exchanger, and contamination of the coil of the heat exchanger. The ash makes the heat exchange insufficient, the capillary at the end of the heat exchanger coil is blocked, etc., so when the unit fails, the technicians often have to spend a lot of time and energy to check one by one before finally finding out that the fault is due to the insertion of the temperature sensor. It is caused by the reverse, so once the temperature sensor is inserted reversely, the technicians will have to work hard to find out the real cause from a variety of fault causes. Moreover, the detection time is long, and the repair time is naturally delayed. It also brings great inconvenience to users, resulting in poor user experience

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