In order to master the troubleshooting techniques of the fast temperature change test chamber, we must first understand the working principle of the fast temperature change test chamber, the structural structure of the test box, and the necessary operational skills and mechanical maintenance knowledge. With this knowledge, we can According to the abnormal condition of the rapid temperature change test chamber, the fault can be quickly determined.
The fast temperature change test chamber compressor in operation is controlled by high and low voltage relays. However, after most high voltage relays are tripped, manual reset must be performed to restart the compressor. Therefore, the fast temperature change test box compressor is frequent. Start-stop is generally not caused by high-voltage relays, mainly low-voltage relays, mainly caused by the following four types of phenomena:
1) The amplitude difference of the low-voltage relay is too small, or the temperature of the temperature relay is too small in the joint control system of the temperature relay and the low-voltage relay;
2) The suction and exhaust valve or safety valve of the compressor leaks, so the high pressure gas will leak to the low pressure system after the shutdown, the pressure will rise quickly and the compressor will start. After the start, the pressure of the low pressure system will be quickly pumped down. The relay is stopped again;
3) The automatic oil return valve leakage of the oil separator;
4) Expansion valve ice plug.
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