| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat exchanger in which durability is enhanced, while reducing noise incident to vibration, by suppressing vibration of a heat-receiving pipe while keeping the feature of the heat exchanger that the heat receiving pipe is secured to the case or cantilevered, only at both connection end parts for water supply and hot water delivery, thereby suppressing cracks at the welded part of the heat receiving pipe generated due to aging. SOLUTION: The heat exchanger comprises a heat-receiving pipe unit 20 for heat exchange, and a case 10 for containing the heat receiving pipe unit 20, wherein the heat receiving pipe unit 20 is supported fixedly on the side wall 11 of the case 10, only at connection end parts 21a, 22a for water supply and connection end parts 21b and 22b for hot water delivery. The case 10 is fixed directly or indirectly with a resilient holding piece 50, which comes into contact with the case 10 to urge the case 10. |
