Huanjing tells you why the constant temperature and humidity box is not cooled.

The main products of Huanjing Technology: constant temperature and humidity box, high and low temperature test box, hot and cold impact box, wet heat alternating test box, thermal shock test machine, constant temperature and humidity machine, high and low temperature damp heat test box, LED special constant temperature and humidity Box, salt spray machine, and other environmental equipment.

Due to the age of use, lack of maintenance, resulting in constant temperature and humidity test chambers are not cooling, in this case, we should do the following:

1. Since the constant temperature and humidity chamber is unable to maintain temperature, observe whether the refrigeration compressor can be started during the operation of the test chamber. The compressor can be started during the operation of the environmental test equipment, indicating the electrical appliances from the main power supply to the compressors. The line is normal and there is no problem with the electrical system.

2. If there is no problem with the electrical system of the constant temperature and humidity test chamber, continue to check the refrigeration system. Firstly, the exhaust and suction pressures of the low-temperature (R23) compressors of the two groups of refrigeration units are lower than the normal values, and the suction pressure is evacuated, indicating that the refrigerant capacity of the main refrigeration unit is insufficient.

3. Touch the exhaust and suction lines of the R23 compressor of the main unit by hand, and find that the temperature of the exhaust line is not high, and the temperature of the suction line is not low (not frosted), which also explains the host group. The lack of R23 refrigerant.

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