| 摘要 |
PROBLEM TO BE SOLVED: To provide a cooling water inlet structure of a heat exchanger capable of unifying the flow of cooling water in a shell, and eliminating a local superheated region to perform good heat exchange. SOLUTION: This cooling water inlet structure in the heat exchanger of an EGR cooler and the like in which a tube assembly is incorporated in a shell of the heat exchanger, and heat is exchanged by allowing an EGR gas of high temperature to pass through the inside of tubes, and allowing the cooling water to pass through the outside of the tubes, comprises an inlet adaptor forming a cooling water inlet of the heat exchanger, a cooling water straightening member projecting to an inner face side of the shell provided with the inlet adaptor and controlling the flowing direction of the cooling water, and a cooling water passage formed on a wall surface at a lower side including a part just under an inlet adaptor installation part of the shell, with the groove shape expanded downward with a proper width over the whole length in the transverse direction of a lower side of the shell. COPYRIGHT: (C)2009,JPO&INPIT
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