| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a water-refrigerant heat exchanger of a heat pump water heater capable of increasing a heat transferring area between two fluids, and reducing pressure loss. <P>SOLUTION: The water-refrigerant heat exchanger 1 is composed of an outer tube 11 and an inner tube 12, an outlet side of the second fluid flowing in the inner tube 11, of the inner tube 11 is composed of a plurality of tubes, and the number of tubes at an inlet side of the second fluid flowing in the inner tube 11 constitutes a flow channel with the tubes less than the tubes at the outlet side, thus the heat transferring area between two fluids can be increased, and pressure loss can be reduced with high efficiency. <P>COPYRIGHT: (C)2008,JPO&INPIT |
