The battery test box is cooled by an air-cooled compressor. The working principle is the same as that of air conditioner. During the cooling process, the refrigerant is used for cooling. Once the refrigerant leaks, the test box will stop.
To troubleshoot, you first need to understand the working principle of the fault. The compressor of the battery test box draws low-temperature and low-pressure refrigerant gas from the suction pipe, and the piston is compressed by the motor operation, and then the high-temperature and high-pressure refrigerant is discharged to the exhaust pipe. Agent gas to provide power for the refrigeration cycle, thereby achieving a refrigeration cycle of compression-condensation-expansion-evaporation (heat absorption). What to do if refrigerant leaks?
the first method:
The core component of the refrigeration system of the battery test chamber equipment is the compressor. First of all, we should perform a leak check on the device. Use a leak detector and soapy water to check the leak point. If it is found that the hot gas bypass solenoid valve If there is a crack in the valve stem, replace the solenoid valve. If leakage is found in other places, repair the leak with oxygen welding and recharge the system, and the system operation can return to normal.
If the second method is cascade cooling, 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 has leaked. You must cool the battery test box. The system conducts leak detection, input high-pressure nitrogen into the copper pipe, and use a combination of a leak detector and soapy water to check the leak point. Usually there is only one leak point, and sometimes there are multiple leak points, which is relatively rare. After finding the leak point, seal the leak with oxygen welding, then fill the refrigeration system with nitrogen, and hold it for 48 hours. During the pressure maintaining process, it is found that the pointer of the pressure gauge has not changed, indicating that the leak point has been repaired normally and nitrogen is released. Charge the system with environmentally friendly refrigerants R404 and R23, and the refrigeration system can resume normal operation.