| 摘要 |
<p>PURPOSE:To provide a high efficiency of a heat pump type hot water feeding machine and to reduce a required amount of refrigerant. CONSTITUTION:There are provided a refrigerant circuit in which a compressor 1, a four-way valve 2, the first refrigerant-to-water heat exchanger 3, the first pressure reducing device 4, the second refrigerant-to-water heat exchanger 5, the second pressure reducing device 6 and an evaporator 7 are connected in sequence; and a hot water feeding circuit in which a hot water storing tank 8, a water circulation pump 9, the second refrigerant-to-water heat exchanger 5 and the first refrigerant-to-water heat exchanger 3 are connected in sequence. Liquid refrigerant flowed out of the first refrigerant-to-water heat exchanger is reduced in its pressure by the first pressure reducing device to an intermediate pressure, water of low temperature fed from the hot water storing tank through the water circulating pump is heated and further heated up to a higher temperature with the first refrigerant-to-water heat exchanger so as to improve an efficiency in operation.</p> |
