| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hot water storage type water heater capable of supplying the hot water of a desired temperature without cooling the hot water to 30°C once by supplying the water even when the temperature of the hot water in the hot water storage tank is within the range of about 30-40°C which is lower than the desired hot water supply temperature. <P>SOLUTION: This hot water storage water heater 30 is composed of a solar heat collector 1 and a hot water storage tank 2 connected through a heat exchanging system. The heat exchanging system comprises the following heat pump cycles (a)-(d) to raise and keep the temperature of the hot water in the hot water storage tank 2 at a high temperature. The heat pump cycle comprises (a) pumping up the heat collected by the solar heat collector 1 by an evaporator 11 by using a refrigerant (gasification of refrigerant), (b) raising a pressure and a temperature of the refrigerant gas by a compressor (operated by commercial power source) 12, (c) pumping up the heat by a condenser 13 mounted at the hot water storage tank side (liquefaction of refrigerant gas), and (d) expanding the liquefied refrigerant by an expansion valve 14. <P>COPYRIGHT: (C)2004,JPO |
