Reasons and inspection methods of refrigerant leakage in constant temperature and humidity test chamber

The compressor of the constant temperature and humidity test chamber sucks in low-temperature and low-pressure refrigerant gas from the suction pipe, drives the piston to compress it through the operation of the motor, and discharges the high-temperature and high-pressure refrigerant gas to the exhaust pipe to provide power for the refrigeration cycle , So as to realize the refrigeration cycle of compression-condensation-expansion-evaporation (heat absorption).

What to do if the refrigerant leaks? First, observe the pressure gauge on the back of the constant temperature and humidity test chamber to see if the pressure is within the normal range. If it is lower than the normal value, it means that the refrigerant has leaked. The refrigeration system of the constant temperature and humidity test chamber is leak-tested, high-pressure nitrogen is input into the copper pipe, and the leak detector is combined with soapy water to check the leaks.

The reasons for the leak are as follows:

1. System piping: The copper pipe is not welded firmly, cracked, blistered, loosened, broken, etc. when it leaves the factory;

2. Screw connection: the seal with screw is loose;.

3.Rubber seals: including various types of rubber seals and gaskets in the refrigeration system caused by long-term use of aging, cracks and shapes;

4. Accessories problems: including compressors, solenoid valves, expansion valves, globe valves and other accessories that are not tightly pressed and worn;

5. Fixing method: It is also a common cause of refrigerant leakage;