In the above, we have learned two methods for leak detection in the constant temperature and humidity chamber refrigeration system, namely soap bubble leak detection and water leak detection. Next, we will explain this issue.
3, charging and leak detection
After the refrigeration system has been repaired and welded, it is best to fill the 1.5Mpa nitrogen gas and close the three-way service valve (the valve itself cannot leak) before charging the refrigerant. Waiting for the next day to work, if the gauge pressure does not drop, indicating that the repaired refrigeration system does not leak. If the gauge pressure drops, it indicates that there is a leak, and then the soap bubble leak detection method is used for leak detection.
4, hand touch oil leak detection
The refrigerant in the constant temperature and humidity test chamber is mostly R23, and R23 has a certain mutual solubility with the frozen oil. When the R23 leaks, the frozen oil will also ooze or drip out. Using this feature, you can judge whether there is any leak at this place by visual inspection or by hand. When there is less leakage and it is not obvious to touch with your fingers, you can wear white gloves or white paper to contact the suspicious area, and you can also find the leak.
5, halogen lamp leak detection
The color of the flame changes from light green to dark green to purple, and the leakage varies from micro-leakage to severe leakage. Electronic leak detector for leak detection. The main parts of the leak detection are: the welding part of the suction and exhaust pipes of the compressor; the small elbow of the evaporator, the condenser, the inlet and outlet pipe and the welding parts of each branch pipe: such as the dry filter, the stop valve, the solenoid valve, Thermal expansion valve, distributor, liquid storage tank, etc. Judgment of the difference between leakage and clogging: the leakage at the leak, vacuuming, refilling the refrigerant, the air conditioner can restore the cooling effect; if it is blocked, even if fluoride is added, the constant temperature and humidity test chamber can not be cooled, and the pressure is not normal.
The above is a small-scale editing and cooling system for your constant temperature and humidity test chamber refrigeration system.
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