| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an operation method for a hot water supply device, causing no increase in size, inexpensive, and exhibiting stable heating capability for hot water supply and drying even when outside temperature changes in summer, winter or the like and even when starting, a hot water supply device and a fluid heater. <P>SOLUTION: In this operation method for the hot water supply device, a refrigerating cycle in which the operation is performed with the interior of a high side refrigerant passage T1 kept in the supercritical state, and water whose temperature is elevated and the other fluid are passed through a gas cooler 4 to elevate the temperature. In this hot water supply device and this fluid heater, a refrigerant by-pass passage T4 connecting extending from the middle of a gas cooler 4 and a compressor 2 to the outlet side is provided, a supercritical refrigerant tank 30 is interposed in the refrigerant by-pass passage T4, and a first solenoid valve 32 at the inlet of the supercritical refrigerant tank 30 and a second solenoid valve 34 at the outlet are operated to open and close, thereby keeping the refrigerant in the refrigerant by-pass passage T4 extending from the discharge side of the compressor 2 to the second solenoid valve 34 in the supercritical state. <P>COPYRIGHT: (C)2008,JPO&INPIT |
