How to repair the high and low temperature test chamber

High and low temperature test boxes are widely used in the sales market. In many manufacturing industries, we can see the back of the high and low temperature test boxes. However, the high and low temperature test boxes must be maintained on time in their application, otherwise they are very easy to cause common failures. When the high and low temperature test boxes have common failures, the operation system process of the test boxes should be investigated, and then the maintenance should be carried out.

When there is no doubt about the electrical equipment management system of the high and low temperature test chamber, check the refrigeration management system again, mainly check the two groups of refrigeration and compression generator units of the high and low temperature test chamber. If the exhaust pipe and breathing working pressure of the ultra-low temperature class compressor are slightly lower than the standard value, and the breathing working pressure is pumping time, this indicates that the refrigerant volume of the main refrigeration unit is significantly insufficient, Then touch the exhaust pipe and breathing pipe of R23 tightener of the main generator set in the high and low temperature test box. If the temperature of the exhaust pipe is not high, the temperature of the breathing pipe is not low (no frost), which also indicates the lack of R23 refrigerant of the main generator set.

A leading generator set of the high and low temperature test box. In addition, to cooperate with the generator set, when the temperature reduction speed is high, the two generator sets work together. In the early stage of the temperature persistence period, the two generator sets still work together. When the temperature is basically stable, the cooperation with the generator set will be terminated. The main generator set will continue to reduce the temperature and be stable. If the main generator set R23 leaks, It will make the actual cooling effect of the main generator set small.

During the process of the desuperheating system, the two generator sets work together, so there is no phenomenon that the temperature cannot be stabilized, and the desuperheating speed is marked as reduced During the temperature persistence period, if the main generator set stops working in coordination with the generator set, and there is no actual cooling effect, the gas temperature in the high and low temperature test box will slowly rise. When the temperature rises to the required level, the operation management system will start to cooperate with the generator set again to reduce the temperature, and then cooperate with the generator set and stop working. This will show the problem of low temperature persistence.

Maintenance method of high and low temperature test chamber.