| 摘要 |
A heat exchanger to be used as a gas cooler has a refrigerant inlet and a refrigerant outlet provided at upper and lower header sections, respectively, of a first header tank. A value represented by a formula {(L 1 +L 2 )/2}+(Tx2N) is defined as an average flow path length L 0 , where L 1 represents the total interior length of both the header sections of the first header tank, L 2 represents the interior length of the header section(s) of the second header tank, T represents the length of the flat tubes, and N represents the number of the header section(s) of the second header tank. The positions of the refrigerant inlet and outlet are determined to satisfy the relation 0.8<=LX/L 0 <=1.2, where Lx represents a flow path length for refrigerant which flows into the upper header section from the refrigerant inlet and flows out of the refrigerant outlet.
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