The system is used for helium charging recovering and leak detection of air conditioning systems. Firstly, a large leak tightness test is performed on the workpiece by using a nitrogen pressure of 4.5 MPa, then 2.0MPa helium is charged into workpiece, and then helium mass spectrometer with sniffer gun is applied to the workpiece for fine leak detection, after that helium inside of workpiece is recovered. The system can determine the qualified and unqualified workpiece, and locate the leak sites.
In order to protect the customer's clean inspection workshop from helium pollution, all joints of the equipment are subjected to a leak detection process to ensure that the entire equipment will not leak.
Automatic compensation: When the total amount of helium in the system is less than the set value, helium is automatically replenished from the external helium device until the total helium volume reaches the set value.
Automatic gas overpressure protection: When the helium volume in the low pressure gas container is too much, and the compressor cannot recover the helium gas in time due to some special reasons, the safety relief valve will automatically open to excessive helium gas, so as to protect system not be damaged by excessive gas; mechanical safety valve automatically discharges overpressure gas when the bleed valve fails.
Automatic gas concentration monitor: system has automatic helium concentration monitoring function and concentration alarm function.