Heat pipe is the use of the principle of heat conduction and the rapid heat transfer properties of the refrigerating medium, through the heat pipe to quickly transfer the heat of the heating object to the heat source, its thermal conductivity exceeds the thermal conductivity of any known metal. At present, heat pipe technology is widely used in computers, various electrical appliances and other equipment to dissipate heat, and the common shapes are round tubes, plates (VC monomers), etc.
Heat pipes need to be leak tested for reasons:
The heat pipe is filled with a special liquid to enhance the thermal conductivity, if there is a leak point in the heat pipe itself, it will affect the thermal conductivity of the heat pipe first. Secondly, because the heat pipes are installed inside the equipment, if there is a leak, the liquid encapsulated inside will flow out, which will seriously pollute and affect the normal operation of the equipment, so the heat pipe manufacturers will use the Pfeiffer helium mass spectrometry leak detector to detect the leak of the heat pipe.
Heat Pipe Leak Detection Customer Story:Shanghai Bodong is one of the world's top 500 IT companies, with branches and sales offices in the United States, Japan, Europe, Scotland, Singapore and other places, with nearly 90,000 employees worldwide. The company is a manufacturer of power supply devices, with a market share of more than 25%.
Shanghai Bodong heat pipe leak detection method:
The standard leakage rate qualified line of the company's heat pipe before leaving the factory is E-8 MBARL S, when using the German Pfeiffer ASM 340 helium mass spectrometry leak detector to detect leaks, set E-8 as the alarm value, when the leakage rate is lower than this value, the product is qualified, when the leakage rate is higher than this value, the leak detector sends out an audible and visual alarm, indicating that the product has leakage.
The heat pipe adopts the vacuum leak detection mode of the leak detector, because the product does not have a standard interface for vacuuming, Shanghai Bodong customizes the vacuum fixture according to the actual situation of the customer, one end is connected to the leak detector, and the other end is connected to the product, the specific method is as follows
1.Start the Pfeiffer Helium Mass Spectrometry Leak Detector ASM 340 and attach the fixtures.
2.Insert the heat pipe into the clamp and seal with vacuum mud sealing.
3.Press Start on the leak detector to start vacuuming.
4.Helium is sprayed around the product, with E-8 mbarl s as the qualified line.
Bodong offers a complete product line of helium mass spectrometry leak detectors, from portable helium mass spectrometry leak detectors to leak detection modules, providing negative pressure leak detection (vacuum method) and positive pressure leak detection (sniffer method) to meet various applications. Compared with traditional foam leak detection and differential pressure leak detection, the helium mass spectrometry leak detector can detect a smaller leak rate of 5e-13 pa m3 s while providing non-destructive leak detection, and the leak point can be accurately located and quantified by using helium as a tracer gas. Helium mass spectrometry leak detectors can be integrated into leak detection systems or PLCs
If you need to know more about heat pipe leak detection, you need to know more.
Please contact Ms. Yip at 1391-883-7267
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