Air conditioner malfunction detection method and system

Abstract

The invention discloses a fault detection method for an air conditioner, comprising: when the air conditioner is in a cooling state, obtaining the discharge temperature of the compressor and the temperature of the air port of the condenser after the four-way valve; If the air port temperature difference is higher than the preset value, it is determined that the air conditioner is faulty. The invention also discloses a fault detection system for an air conditioner, which includes a compressor, a four-way valve, a condenser, a throttling device and an evaporator, and also includes: a temperature sensor at the air port of the condenser, which is arranged between the four-way valve and the condenser on the pipeline between the compressors; the compressor discharge temperature sensor is arranged on the pipeline between the four-way valve and the compressor. The invention can accurately detect various faults in the working process of the air conditioner, so as to ensure the normal operation of the air conditioner.

Description

technical field [0001] The invention relates to the field of air conditioners, in particular to an air conditioner fault detection method and system. Background technique [0002] The air conditioner is one of our most commonly used home appliances. The air conditioner uses the compressor to compress the refrigerant, and the refrigerant absorbs and releases heat to realize the cooling and heating functions. This requires the refrigerant to circulate repeatedly in the air conditioner in various states. It is easier to cause leakage. The leakage of refrigerant in the air conditioner will not only affect the cooling and heating effects, but also increase the workload of the air conditioner, increase the exhaust temperature of the compressor in the air conditioner, and even burn the compressor. Therefore, it is necessary to accurately detect failures such as refrigerant leakage of the air conditioner. [0003] The existing air conditioner refrigerant leakage fault detection me...

AI Technical Summary

Problems solved by technology

When the refrigerant only partially leaks and the air conditioner continues to operate, the low pressure switch 16 is difficult to detect

In this way, the refrigerant will continue to leak, which will affect the cooling and heating effects of the air conditioner. Once the discharge temperature protection fails or there is no discharge temperature protection, the compressor may burn out due to excessive operating temperature.

[0006] When the air conditioner is switching between cooling and heating modes, there may be faults such as the four-way valve 12 not reversing, so that the air conditioner cannot work normally, and the low-pressure pressure switch 16 cannot detect this fault

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