초록 ▼

A reversible heat pump provides multiple heating and cooling modes and includes a compressor, an evaporator and heat exchanger all interconnected and charged with refrigerant fluid. The heat exchanger includes tanks connected in series to the water supply and a condenser feed line with heat transfer

A reversible heat pump provides multiple heating and cooling modes and includes a compressor, an evaporator and heat exchanger all interconnected and charged with refrigerant fluid. The heat exchanger includes tanks connected in series to the water supply and a condenser feed line with heat transfer sections connected in counterflow relationship. The heat pump has an accumulator and suction line for the refrigerant fluid upstream of the compressor. Sub-cool transfer tubes associated with the accumulator/suction line reclaim a portion of the heat from the heat exchanger. A reversing valve switches between heating/cooling modes. A first bypass is operative to direct the refrigerant fluid around the sub-cool transfer tubes in the space cooling only mode and during which an expansion valve is utilized upstream of the evaporator/indoor coil. A second bypass is provided around the expansion valve. A programmable microprocessor activates the first bypass in the cooling only mode and deactivates the second bypass, and vice-versa in the multiple heating modes for said heat exchanger. In the heating modes, the evaporator may include an auxiliary outdoor coil for direct supplemental heat dissipation into ambient air. In the multiple heating modes, the condensed refrigerant fluid is regulated by a flow control valve.

대표청구항 ▼

A combined heat pump/air conditioning system having multiple heating and cooling modes of operation comprising in combination: a reversible heat pump means including a compressor, an evaporator means and heat exchange means interconnected and charged with refrigerant fluid to produce heating and/or

A combined heat pump/air conditioning system having multiple heating and cooling modes of operation comprising in combination: a reversible heat pump means including a compressor, an evaporator means and heat exchange means interconnected and charged with refrigerant fluid to produce heating and/or cooling upon demand; said heat exchange means effecting heat transfer between the refrigerant fluid and a first working fluid to condense said refrigerant fluid; an accumulator and suction line for feeding refrigerant fluid to said compressor; sub-cool transfer means for refrigerant fluid for reclaim of heat from said heat exchange means and provided by the refrigerant fluid in at least one of said accumulator and suction line prior to entry into said compressor; reversing valve means for switching said system between said heating/cooling modes; first bypass means for said refrigerant fluid from said heat exchange means with respect to at least a portion of said sub-cool transfer means when said reversing valve means is set for the cooling only mode of a second working fluid; pressure reducing means for feeding said bypassed refrigerant fluid to said evaporator during said cooling only mode of said second working fluid; second bypass means for directing said refrigerant fluid around said pressure reducing means; and control means for activating said first bypass means for bypassing said sub-cool transfer means and delivering refrigerant fluid to said pressure reducing means for said cooling only mode, and for deactivating said first bypass means and activating said second bypass means in the multiple heating modes for said heat exchange means, whereby maximum efficiency for said working fluids for both cooling and heating effect is obtained in the respective heating/cooling modes of operation.