| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve heating performance especially at an outlet high-temperature area of a heat exchanger for supplying hot water including a core pipe and an outer pipe. <P>SOLUTION: This heat exchanger for supplying hot water includes the core pipe 1 forming a water passage 2 and outer pipes 3A, 3B forming refrigerant passages 3a, 3b joined to the outer periphery of the core pipe 1, and the heat exchanger is configured to perform heat exchange between water and a refrigerant. An outlet side part with a predetermined length in the core pipe 1 where high-temperature water flows is formed of a corrugated pipe, the inner surface of which is provided with circumferential projection projected toward the central axis of the pipe. <P>COPYRIGHT: (C)2009,JPO&INPIT |
