Rapid temperature test chamber common reasons for multiple compressor starts

High and low voltage relays control the start and stop of the compressor in the fast temperature test chamber during operation, but most of the high voltage relays can only be restarted manually after tripping. Therefore, the multiple start and stop of the compressor is usually not caused by the high voltage relay, but by the low voltage relay, which is mainly caused by four phenomena:

1. Rapid temperature test chamber The amplitude difference of low-voltage relay is small. When the chamber temperature is jointly controlled by the temperature control system and low-voltage relay, the amplitude difference of low-voltage relay is too small.

2. the suction and exhaust valve or safety valve in the compressor leaks, so the high pressure gas will leak to the low pressure system after the shutdown, the pressure rises quickly to start the compressor, after the start, the pressure in the low pressure system drops quickly, resulting in the shutdown.

3. Automatic oil return of lubricating oil separator causes valve leakage.

4. expansion valve ice plug caused by the compressor many times to start.