Refrigeration circuit for heat pump water heater and control therefor
System for air-conditioning and hot water supplying Patent #: 4507938
ApplicationNo. 06/699128 filed on 02/07/1985
US Classes:62/160, Reversible cycle machine62/228.4, By variable speed motor or pulley type mechanism62/238.6, With vapor compression system62/324.6With flow control or compressor details
ExaminersPrimary: Wayner, William E.
Attorney, Agent or Firm
International ClassesF24D 15/00 (20060101)
F24D 15/04 (20060101)
F25B 13/00 (20060101)
Foreign Application Priority Data1984-02-09 JP
AbstractA room-warming/cooling and hot-water supplying heat-pump apparatus comprises a refrigerant circuit provided with a compressor, a four-way valve for switching room warming and cooling operations, a room side heat exchanger, a reversible flow type expansion device and an outdoor side heat exchanger, wherein a first switching means is connected to the outlet side of the compressor; a first branch of the switching means is connected to the four-way valve and a second branch of the first switching means is connected to one end of a heating coil in a hot water tank; the other end of the heating coil extends out of the hot water tank and has a branched part. A pipeline including the branched part has both ends connected to the refrigerant circuit at both sides of the expansion device in which at least one valve means is provided in the pipeline including the branched part and the first switching means and the valve means are controlled by a control device.