The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 19, 1976
Filed:
Apr. 10, 1975
Berth Ulrik Gustafsson, Osterskar, SW;
Projectus Industriprodukter AB, Stockholm, SW;
Abstract
There is provided a heating installation comprising a heat pump and a fuel-fired boiler to which a radiator circuit is connected. A separate hot water heater may be coupled in parallel with the boiler. The hot side of the heat pump is connected to a first shunt pipe in the radiator circuit and is thus coupled in parallel with the boiler. A second shunt pipe is coupled in parallel with the boiler and a third shunt pipe is connected between the hot side of the first shunt pipe and the second shunt pipe. A first threeway shunt valve is connected between the first and third shunt pipes and a second threeway shunt valve is connected between the second shunt pipe and the hot side of the radiator circuit. These two shunt valves may be interlocked. Further the compressor of the heat pump may be arranged to be controlled by the pressure of the refrigerant in the heat pump circuit between the evaporator and the compressor.