Application of helium leak detection and recovery system of vacuum chamber in automobile air conditioner

With the vigorous development of the domestic automobile industry, the state and the refrigeration industry have strict requirements on the annual leakage of the two condensers and evaporators of automobile air conditioners. The traditional water detection method has low accuracy and high error rate, which can no longer meet the requirements of modern automobile air conditioning detection standards. The helium mass spectrometer leak detection method has the advantages of high leak detection accuracy, low misjudgment rate, clean and...

Comparison of several leak detection methods and leak detectors

1.Hydrometric method This is the simplest and original leak detection method, which is used for bicycle tyres. It is to fill the tested work with air greater than atmospheric pressure. 1.0-3.0Mpa) Put it into the water to see if there are bubbles emerging from the workpiece. The location of bubbles is the location of leakage. The leakage rate can be estimated according to the rate of bubbles, the rate of bubbles and the size of bubbles. 2.Halogen method Previously, common refrigerators used halide as the refrigerant. When ...

Leak detection technology of aircraft wing integral fuel tank based on helium mass spectrometer leak detector

The sealing of wing integral fuel tank is the key in the manufacturing technology of wing box, and its sealing performance directly affects the service and safety of aircraft. The integral fuel tank of the wing has large volume and high sealing requirements. The traditional leak detection methods use air tight test and oil tight test. These methods have the disadvantages of low accuracy, high cost, difficult quantification, and low efficiency. In addition, the oil tight test requires a large amount of aviation kerosene to be inject...

Application of Helium Mass Spectrometry Leak Detection Technology in Relays and IC Enclosures

With the continuous development of aerospace technology, the leakage problem has become a key factor that must be considered in the design and manufacture of aerospace products. More and more people pay attention to it. The leakage rate detection of related electronic components has attracted great attention of researchers. At present, the leakage detection technology is mainly applied to sealed relays and integrated circuit enclosures. Helium mass spectrometer leak detector can be used to measure the leakage rate of sealed relay ...

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