关键词: 散热器；泄露问题；散热管开裂；疲劳断裂；防冻液

Abstract: During the adaptability test of a certain type of product in the severe cold area, the root of the radiator heat pipe cracked, which led to the leakage of the radiator and seriously affected the use of the product. In this paper, through the analysis and verification of the design structure, material, antifreeze filling process and fracture of the radiator, it is confirmed that due to the defects in the antifreeze filling method, the internal air of the radiator is not removed clean and the heat is out of balance in the left and right area of the radiator at low temperature, fatigue cracking occurs in the heat pipe. The rectifying measures of perfecting the filling method of radiator antifreeze and defining the filling amount are adopted to rectify the problem, and the test verification of the rectified vehicle is carried out, which solves the problem of radiator leakage and improves the reliability of the product. It can be used as a reference for the design and production of similar products.

Key words: Radiator; Leakage problem; Heat pipe cracked; Fatigue cracking; Antifreeze