How to deal with the leakage of refrigerant in the battery test box

How to deal with the leakage of refrigerant in the battery test box

The battery test chamber is cooled by an air-cooled compressor. Its working principle is the same as that of air-conditioning. In the refrigeration process, a refrigerant is used for cooling. Once the refrigerant leaks, the test chamber will stop.

To troubleshoot the fault, you first need to understand the working principle of the fault. The compressor of the battery test box 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 high-temperature and high-pressure refrigeration to the exhaust pipe. The agent gas provides 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?

the first method:

The core component of the refrigeration system of the battery test chamber equipment is the compressor. First, we should check the equipment for leaks. Use a combination of leak detector and soapy water to check where the leak is. If it is found to be the hot gas bypass solenoid valve If the valve stem is cracked and has a fine seam, replace the solenoid valve. If a leak is found in other places, use oxygen welding to repair the leak completely, and then refill the system with fluorine, and the system operation can return to normal.

The second method:

If it is cascade refrigeration, you can observe the pressure gauge on the back of the battery test box to see if the pressure is within the normal range. If it is lower than the normal value, it means that the refrigerant is leaking, and the refrigeration system of the battery test box should be leak-checked. , Input high-pressure nitrogen into the copper pipe, and use a combination of leak detector and soapy water to check for leaks. Usually there is only one leak, and sometimes there are multiple leaks, which are relatively rare. After finding the leak, use oxygen welding to weld and seal the leak, and then fill the refrigeration system with nitrogen, and hold the pressure for 48 hours. During the pressure holding process, it is found that the pointer of the pressure gauge does not change, indicating that the leak has been repaired and the nitrogen is released. Fill the system with environmentally friendly refrigerants R404 and R23, and the refrigeration system can resume normal operation.