| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat exchanger capable of minimizing the increase of pressure loss when a supercritical refrigerant flows into a first refrigerant circulating portion of an outer plate from a flat tube, and flows into the flat tube from the first refrigerant circulating portion of the outer plate. SOLUTION: A gas cooler comprises a pair of header tanks 2, and the plurality of flat tubes 4 arranged in parallel with each other between both header tanks 2. Each header tank 2 is constituted by stacking and brazing the outer plate 7, an inner plate 8 and an intermediate plate 9. Relationships of L≥0.7T, and 1.1T≤W≤2.5T are satisfied when a tube height of the flat tube 4 is T (mm), a distance from both ends of the flat tube 4 to an inner face of the outer plate 7 is L (mm), and a width of a communication hole 22 of the intermediate plate 9 is W (mm). COPYRIGHT: (C)2008,JPO&INPIT
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