| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a heat exchanger having a long life, capable of preventing the generation and deposition of scales. <P>SOLUTION: The heat exchanger 10 is configured to reduce a flow path thickness of an inlet side flow path 25a in the vicinity of a water inlet 23a of a lower part, and to increase the thickness of an outlet side flow path 25b in the vicinity of a water outlet 23b of an upper part. Accordingly, a flow rate is fast in the inlet side flow path 25a, and a velocity gradient of a boundary layer between a heat transfer surface of a plate heater surface and a fluid is increased to improve a heat transfer rate. In addition, air bubbles generated on the heat transfer surface in the outlet side flow path 25b easily come off, thereby preventing the generation and deposition of the scales to provide the heat exchanger having the long life. <P>COPYRIGHT: (C)2013,JPO&INPIT |
