The reason why constant temperature and humidity chamber does not cool down

The important system of the constant temperature and humidity chamber is the refrigeration system, the main operation is dependent on the compressor drive, so the compressor is the main core components of the constant temperature and humidity chamber. In the use of constant temperature and humidity chamber, may appear down not to ask the situation, most cases are considered to be the compressor problem.

Analysis: constant temperature and humidity chamber in the use of the process suddenly in addition to no temperature, should observe the refrigeration compressor in the test chamber operation process can start, the compressor in the environmental test equipment operation process can start, indicating that from the main power supply to the compressor electrical line is normal, the electrical system also no problem. Constant temperature and humidity chamber electrical system no problem, continue to check the refrigeration system.

First of all, check the exhaust and suction pressure of the low-temperature compressor of the two refrigeration units that are lower than the normal value, and the suction pressure is evacuated, which means that the refrigerant quantity of the main refrigeration unit is not enough. By touching the exhaust and suction piping of the compressor of the main unit by hand, it was found that the temperature of the exhaust piping was not high, and the temperature of the suction piping was not low either, which also indicated that the main unit lacked refrigerant.



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