| 摘要 |
PURPOSE:To enable to supply the highly hot water by a system wherein the refrigerant makes the water supply amount of water heater in the overheated gaseous phase less than that of supply water heater in the vapor and liquid phases. CONSTITUTION:The first and second heat exchangers 22, 23 for heating water supply are provided in series together with a compressor 12, pressure-reducing device 13 and heat collecting heat exchanger 11 to constitute a refrigetating cycle. In such a constitution, the refrigerant in the tube 24 in the first heat exchanger 22 forms over-heated gaseous phase while that in the tube 25 in the second heat exchanger forms vapor and liquid phases. The water tubes 26, 27 of both heat exchangers 22, 23 are connected to the hot water reservoir 15 in series through a pump 9 making the intermediate temperature water circulating channel 35 diverge from the position between the water tube 26 and 27 to the intermediate temperature reservoir 15b in said hot water reservoir 15 while connecting the high temperature water circulating channel 34 to the high temperature water reservoir 15a. Both circulating channels 34, 35 are provided with water temperature detectors 38, 39 and flow rate controlling valves 36, 37 making the water supply amount in the water tube 26 less than that in the water tube 27. |
