Helium mass spectrum leak detection system for multi-channel heat exchanger

The invention provides a helium mass spectrum leak detection system for a multi-channel heat exchanger. The helium mass spectrum leak detection system comprises a gas source assembly and a helium mass spectrum leak detection tool. The gas source assembly is configured to provide detection gas, and the helium mass spectrum leak detection tool is configured to detect the inner leak rate between different heat exchange channels of the multi-channel heat exchanger and the outer leak rate between the different heat exchange channels and the outside according to the leakage rate of the detection gas. Wherein the gas source assembly comprises a gas source connector, a first gas path, a second gas path and a third gas path, the first gas path, the second gas path and the third gas path are connected to the gas source connector in parallel, the first gas path is provided with a helium source and a helium valve for controlling on-off of the first gas path, and the second gas path is provided with a nitrogen source and