| 摘要 |
PROBLEM TO BE SOLVED: To provide a water heat exchanger capable of efficiently exchanging heat between water and a refrigerant, and easily manufactured. SOLUTION: The water heat exchanger 22 includes a refrigerant tube 22a, a water tube 22b, a first header 51a, a second header 51b, a third header 52a and a forth header 52b. The refrigerant tube is composed of porous flat tubes 41A, 41B having a plurality of refrigerant flow channel holes 47 in which the refrigerants can be circulated. The water tube is composed of a single-hole flat tube 42 having one water flow channel hole 48 in which water can be circulated. The first header and the second header are headers for a refrigerant, and connected to both ends of the refrigerant tube. The third header and the forth header are headers for water, and connected to both ends of the water tube. The refrigerant tube and the water tube have closely-contact faces where side faces at cross-section longitudinal sides are closely kept into contact with each other. The closely-contact faces have roughly-rectangular shapes, and first directions L1 as their longitudinal directions are agreed with the flowing direction of the refrigerant or the water. COPYRIGHT: (C)2010,JPO&INPIT
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