| 摘要 |
PROBLEM TO BE SOLVED: To provide a water-cooled heat exchanger capable of reducing the risk of water in a casing leaking to the outside by corrosion of the casing.SOLUTION: A water-cooled heat exchanger 10 includes a casing 11 in which a refrigerant chamber and a water chamber are partitioned and formed. The casing 11 includes: a front lid 11b and a rear lid 11c; a casing body part 40; and a packing 25. The water chamber is formed by the front lid 11b and the rear lid 11c and the casing body part 40 being fastened by a bolt 29. The front lid 11b and the rear lid 11c have: a body part 26 made of a metal material in which a sheet surface 31 with which the packing 25 comes into contact and an insertion hole 30 which penetrates the sheet surface 31 and in which the bolt 29 is inserted are formed; an anticorrosion coating film 27 formed in a portion 26a other than the sheet surface 31 in the body part 26; and a bush 28 made of a material which is less likely to corrode than the metal material of the body part 26, which is arranged inside the insertion hole 30 and which prevents water leak from the insertion hole 30.SELECTED DRAWING: Figure 8 |
