Interpretation of the treatment method that causes the slow cooling of the damp heat test chamber at high and low temperature

Under normal circumstances, the high and low temperature damp heat test chamber will cool down to the corresponding value according to the set time range, but due to the long time of using the equipment or improper operation, high and low temperature humidity the thermal test chamber will slowly cool. Now let\'s see how to solve this problem.

1. When we did not determine what the problem was in the high and low temperature damp heat test chamber, we combined the equipment to further confirm the cause of the problem during the checking process . The equipment has two sets of refrigeration units.
2. One is the main unit and the other is the auxiliary unit. When the cooling rate is high, both sets of units work at the same time. In the initial temperature maintenance phase, both sets of units operatent always at the same time. When the temperature is initially stabilized, the auxiliary unit stops working and the main unit maintains temperature stability.
3. Since the temperature cannot be maintained, observe whether the refrigeration compressor can be started normally during the operation of the test chamber. The compressor can be started during the operation of the environmental test equipment, indicating that the power supply of the main power supply of each compressor electrical circuit is normal and there is no problem with the electrical system.

 There is no problem with the electrical system of the high and low temperature humidity and heat test chamber. Continue to check the refrigeration system. First check that the exhaust and suction pressures of the low temperature compressors (R23) of the two groups of refrigeration units are lower than the no.rmal and the suction pressure is in a discharge state, indicating that the amount of refrigerant of the main refrigeration unit is insufficient.

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