Patents for F25B 13 - Compression machines, plant, or systems, with reversible cycle (6,597)
01/1980
01/22/1980US4184537 Selective heating and cooling apparatus
01/15/1980US4183466 Thermally actuated phase change operated control valve for heat pump systems
01/08/1980US4182133 Humidity control for a refrigeration system
01/01/1980US4180988 Bi-directional filter-drier for heat pumps
01/01/1980CA1068919A Heat pump system selectively operable in a cascade mode and method of operation
01/01/1980CA1068918A Heat pump frost control system
01/01/1980CA1068917A Apparatus for the recovery of useful heat from refrigeration gases
12/1979
12/25/1979US4179894 Dual source heat pump
12/18/1979US4178772 Heat pump system
12/04/1979US4177145 Two-way filter-drier for heat pump systems
11/1979
11/28/1979EP0005599A1 Two-way filter-drier
11/13/1979US4173865 Auxiliary coil arrangement
11/13/1979CA1066073A1 Fuel fired supplementary heater for heat pump
10/1979
10/23/1979US4171622 Heat pump including auxiliary outdoor heat exchanger acting as defroster and sub-cooler
10/23/1979US4171621 Freeze protection device in heat pump system
10/02/1979US4169554 Solar energy system with heat pump assistance
10/02/1979CA1063370A1 Heat pump system
09/1979
09/18/1979US4167965 Integral water-refrigerant-air heat exchange system
08/1979
08/21/1979US4165037 Apparatus and method for combined solar and heat pump heating and cooling system
07/1979
07/31/1979CA1059329A1 Two stage compressor heating
07/10/1979CA1057967A2 Air source heat pump with multiple slide rotary screw compressor/expander
07/10/1979CA1057966A1 Air source heat pump with multiple slide rotary screw compressor/expander
06/1979
06/26/1979US4158950 Heat pump defrost system
06/12/1979US4157649 Multiple compressor heat pump with coordinated defrost
05/1979
05/22/1979CA1054811A1 Heat pump control system
05/16/1979EP0001901A1 Air conditioning units with reversible cycle closed-circuit compression refrigeration systems
05/08/1979US4153105 Reversible latent heat storage method, and reversible latent heat accumulator
04/1979
04/17/1979US4149389 Heat pump system selectively operable in a cascade mode and method of operation
04/10/1979US4148436 Solar augmented heat pump system with automatic staging reciprocating compressor
04/10/1979CA1052112A1 Combination motor cooler and storage coil for heat pump
04/10/1979CA1052111A1 Combination motor cooler and storage coil for heat pump
04/03/1979CA1051680A1 Rotary thermodynamic apparatus and method
03/1979
03/27/1979US4146085 Diagnostic system for heat pump
03/13/1979US4143707 Air conditioning apparatus including a heat pump
03/06/1979US4142576 Heat pump system with improved heat transfer
02/1979
02/13/1979US4138859 Split heat pump outdoor fan arrangement
02/06/1979US4137726 Capacity control system of compressor for heat-pump refrigeration unit
02/06/1979US4137725 Compressor control for a reversible heat pump
01/1979
01/23/1979CA1046783A1 Heat pump frost control system
01/02/1979CA1045394A1 Heat pump system with improved heat transfer
01/02/1979CA1045393A1 Air-conditioning apparatus with booster heat exchanger
12/1978
12/19/1978CA1044476A1 Combined loop heat pump
11/1978
11/28/1978US4127364 Heat pump unit
11/14/1978US4125469 Bi-directional filter drier
10/1978
10/31/1978CA1041312A1 Loss heat suppression apparatus and method for heat pump
10/17/1978CA1040445A1 Heat pump with high efficiency reversible helical screw rotary compressor
09/1978
09/12/1978US4112705 Fuel fired supplementary heater for heat pump
09/12/1978CA1038178A1 Movable expansion valve
08/1978
08/15/1978US4106308 Heating and cooling system with capillary control means
08/15/1978US4106307 Reverse-flow air conditioner
08/15/1978CA1036376A1 Reversible latent heat storage method, and reversible latent heat accumulator
08/08/1978US4105064 Two stage compressor heating
08/08/1978US4104890 Air conditioning apparatus
08/01/1978US4104044 Bidirectional flow filter-drier assembly
07/1978
07/25/1978US4102391 Heat pump frost control system
07/25/1978US4102390 Control system for heat pump and furnace combination
07/25/1978US4102389 Heat pump control system
07/18/1978US4100763 Multi-source heat pump HVAC system
07/18/1978US4100762 Integrated controls assembly
07/04/1978US4098092 Heating system with water heater recovery
06/1978
06/13/1978US4094165 Loss heat suppression apparatus and method for heat pump
05/1978
05/30/1978US4091863 Reversible latent heat storage method, and reversible latent heat accumulator
04/1978
04/25/1978US4086072 Air source heat pump with multiple slide rotary screw compressor/expander
01/1978
01/03/1978US4066118 Air conditioning system
01/03/1978US4065938 Air-conditioning apparatus with booster heat exchanger
11/1977
11/22/1977US4058988 Heat pump system with high efficiency reversible helical screw rotary compressor
11/15/1977US4057977 Reverse cycle heat pump circuit
11/15/1977US4057976 Heat exchanger
11/15/1977US4057975 Heat pump system
11/01/1977US4055964 Heat pump system
11/01/1977US4055963 Heating system
10/1977
10/25/1977US4055056 Reversible refrigerant system and four-way reversing valve therefor or the like
09/1977
09/06/1977US4045977 Self operating excess refrigerant storage system for a heat pump
09/06/1977US4045975 Combination motor cooler and storage coil for heat pump
09/06/1977US4045974 Combination motor cooler and storage coil for heat pump
08/1977
08/16/1977US4042012 Heat pump system with improved heat transfer
06/1977
06/21/1977US4030315 Reverse cycle heat pump
06/21/1977US4030312 Heat pumps with solar heat source
06/14/1977US4029580 Bidirectional flow filter-drier
06/07/1977US4027497 Freeze-up prevention device for a heat pump
05/1977
05/31/1977US4026299 Cooling and heating apparatus
05/24/1977US4024722 Heat pump frost control system
04/1977
04/26/1977US4019338 Heating and cooling system
04/12/1977US4017286 Heat pump suction line vent
03/1977
03/22/1977US4012920 Heating and cooling system with heat pump and storage
12/1976
12/07/1976US3995809 Arrangement for air-conditioning of one or more rooms
11/1976
11/23/1976US3993121 Heat pump conversion system for electric furnace
11/23/1976US3992898 Movable expansion valve
09/1976
09/07/1976US3978684 Refrigeration system
08/1976
08/31/1976US3977210 Heat exchanger applicable more particularly to compressor heat pumps
08/03/1976US3972347 Reversible refrigerant system and four-way reversing valve therefor or the like
06/1976
06/29/1976US3965696 Crop drying (food preserving) apparatus
06/29/1976US3965694 Method and device for thermally air-conditioning a room, a vat or the like
04/1976
04/27/1976US3952537 Reversing valve means for use with a reversible refrigerating cycle system
04/20/1976US3950962 System for defrosting in a heat pump
02/1976
02/17/1976US3938352 Water to air heat pump employing an energy and condensate conservation system
02/17/1976US3938349 Refrigerating apparatus with superheat control
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