| 摘要 |
PURPOSE:To permit to supply high-temperature hot-water without employing an auxiliary heat source and effect efficient heat pump hot-water supply by a method wherein first and second heat exchangers between supplying hot-water and refrigerant are connected in parallel to obtain the hot-water having a temperature lower or higher than the condensing temperature of the refrigerant. CONSTITUTION:The heat exchanger 2 between the supplying hot-water and the refrigerant is consisting of first and second heat exchangers 2a, 2b between the supplying hot- water and the refrigerant, which are connected in parallel. By the effect of first and second temperature regulating valves 7, 9, most part of cold water being circulated by a circulating pump 5 enters into the first heat exchanger 2a and the balance of the cold water enters into the second heat exchanger 2b. Load for a compressor 1 is determined at the side of the heat exchanger 2a substantially and the load fluctuation of the compressor 1 is small even if the valve 9 is choked extremely in order to obtain high temperature water from the second heat exchanger 2b, therefore, the operation may be stabilized. The high temperature water is reserved in the upper part of a water reserving tank 6 and the hot-water of proper temperature is reserved in the lower part thereof, therefore, the necessary temperature hot-water may be obtained by switching a three-way valve 12. |
