Room-warming/cooling and hot-water supplying heat-pump apparatus

Patent 4592206 Issued on June 3, 1986. Estimated Expiration Date:

February 7, 2005. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Refrigeration circuit for heat pump water heater and control therefor
Patent #: 4299098
Issued on: 11/10/1981
Inventor: Derosier

System for air-conditioning and hot water supplying Patent #: 4507938
Issued on: 04/02/1985
Inventor: Hama , et al.

Inventors

Application

No. 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

Examiners

Primary: Wayner, William E.

Attorney, Agent or Firm

Oblon, Fisher, Spivak, McClelland & Maier

International Classes

F24D 15/00 (20060101)
F24D 15/04 (20060101)
F25B 13/00 (20060101)

Foreign Application Priority Data

1984-02-09 JP

Abstract

A 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.

Other References

"Water Heater Attached to the Packaged Air Conditioner", Refrigerator vol. 58, No. 671, pp. 25 to 29, published 9/83
"Cooling, Heating & Hot Water Heat Pump Unit", Refrigeration vol. 58, No. 671, pp. 14 to 18, published in Sep., 1983
"A Feature of Construction of Water Heating Heat Pump", Refrigeration vol. 58, No. 671, pp. 19 to 24, published in 9/83
"Q & A Concerning Heat Pump for Buildings", Japan Refrigeration Air-Conditioning Industrial Association, published Mar., 1982