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Heat Accumulators

Heat-pump-system

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Heat pump system

Details

Inventors: Bussjager, Rudy C.;
Assignee: Carrier Corporation (Syracuse, NY)
Primary Examiner: King; Lloyd L.
Assistant Examiner:
Attorney, Agent or Firm: Curtin; J. Raymond, Hayter; Robert P.

A heat pump system includes a compressor, indoor and outdoor coils and a four-way valve for automatically reversing refrigerant to provide cooling or heating mode of operation. Each coil has a plurality of heat transfer circuits arranged in series when the coil operates as a condenser, and in a parallel when the coil operates as an evaporator. A second four-way reversing valve is provided in the refrigerant circuit between outlets of indoor and outdoor coils to direct refrigerant through liquid lines of the refrigerant circuit from the outlet of one coil used as a condenser to the expansion means of the other coil used as an evaporator. The second four-way reversing valve is arranged in the refrigerant circuit to connect some of heat transfer circuits connected in parallel in each coil when it is used as an evaporator, to the suction line of the compressor.

DETAILED DESCRIPTION It is an object of the present invention to provide an improved heat pump system.
Another object of the present invention is to provide an improved means for directing refrigerant flow through a heat pump system.
It is a further object of the invention to eliminate or reduce the number of check valves used in a heat pump air conditioning system.
Still another object of the present invention is to provide means for automatically regulating the effective charge of refrigerant in the system in either a cooling or a heating mode of operation.
These and other objects of the present invention are attained by utilizing two four-way reversing valves in a refrigerant circuit between the inlets and outlets of the indoor and outdoor coils of the heat pump system.
The first four-way valve is used to direct refrigerant periodically to flow in a series through each coil when that coil is operating as a condenser and to receive refrigerant flowing in parallel circuit when a coil is operating as an evaporator.
The second reversing four-way valve is mounted in the refrigerant circuit either to connect selectively the outlet of one coil used as a condenser to the expansion means associated with the other or evaporator coil or to connect some circuits arranged in a parallel in the coil used as an evaporator to a suction line of the compressor.

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