Patents for F25B 47 - Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass (3,979)
03/1981
03/24/1981US4257795 Compressor heat pump system with maximum and minimum evaporator ΔT control
02/1981
02/24/1981US4251999 Defrosting control system
01/1981
01/27/1981US4246760 Non-reverse hot gas defrost system
01/20/1981CA1093849A1 Energy conservation system having improved means for controlling receiver pressure
01/13/1981CA1093329A1 Multiple compressor heat pump with coordinated design
01/07/1981EP0020332A1 A method for running a cooling-heating pump
12/1980
12/23/1980US4240269 Heat pump system
12/10/1980EP0019736A2 Heat pump system
11/1980
11/04/1980US4231229 Energy conservation system having improved means for controlling receiver pressure
10/1980
10/14/1980CA1087409A1 Heat exchange system using refrigerant
08/1980
08/05/1980US4215817 Devices for heating premises by the use of heat pumps and method therefor
08/05/1980US4215555 Hot gas defrost system
07/1980
07/22/1980US4213306 Method and apparatus for increasing air conditioner efficiency
07/01/1980US4210001 Refrigeration system having improved heat transfer and reduced power requirement for various evaporative refrigerants
05/1980
05/29/1980WO1980001102A1 A method for running a cooling-heating pump
04/1980
04/15/1980US4197716 Refrigeration system with auxiliary heat exchanger for supplying heat during defrost cycle and for subcooling the refrigerant during a refrigeration cycle
03/1980
03/25/1980US4194367 Apparatus for producing ice
03/11/1980US4192150 Defrosting arrangement for a refrigerator
03/11/1980CA1073230A1 Method and apparatus for defrosting a refrigeration system
03/11/1980CA1073229A1 Control system for heat pump and furnace combination
01/1980
01/29/1980US4185467 Icemaker liquid refrigerant defrost system
01/22/1980US4184341 Suction pressure control system
01/08/1980US4182133 Humidity control for a refrigeration system
12/1979
12/18/1979US4178767 Reverse fan heat pump defrost control system
12/04/1979US4176526 Refrigeration system having quick defrost and re-cool
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
09/1979
09/25/1979CA1062927A1 Refrigeration system utilizing saturated gaseous refrigerant for defrost purposes
09/11/1979US4167102 Refrigeration system utilizing saturated gaseous refrigerant for defrost purposes
07/1979
07/31/1979CA1059329A1 Two stage compressor heating
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
05/01/1979US4151722 Automatic defrost control for refrigeration systems
04/1979
04/17/1979USRE29966 Heat pump with frost-free outdoor coil
03/1979
03/06/1979CA1049798A1 Hot gas defrost system with dual function liquid line
02/1979
02/13/1979US4139356 Refrigerating apparatus
01/1979
01/23/1979CA1046783A1 Heat pump frost control system
01/23/1979CA1046782A1 Room heating devices with heat pumps
01/09/1979CA1045840A1 Hot gas defrost system
12/1978
12/12/1978CA1044032A1 Refrigeration and hot gas defrost system
11/1978
11/28/1978CA1043116A1 Compressor refrigeration plant
11/07/1978US4123914 Energy saving change of phase refrigeration system
11/07/1978CA1041782A1 Control means for refrigeration systems
10/1978
10/31/1978US4122892 Devices for heating premises by the use of heat pumps and method therefor
10/31/1978US4122688 Refrigerating system
10/31/1978US4122686 Method and apparatus for defrosting a refrigeration system
09/1978
09/05/1978US4110997 Hot gas defrost system
08/1978
08/08/1978US4105064 Two stage compressor heating
08/08/1978US4104888 Defrost control for heat pumps
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
07/25/1978US4102151 Hot gas defrost system with dual function liquid line
06/1978
06/27/1978US4096708 Compressor refrigeration plant
06/20/1978US4095438 Refrigeration system with hot gas defrost
06/13/1978US4094168 Ice making refrigeration system
04/1978
04/11/1978US4083196 Compressor refrigeration plant
04/11/1978US4083195 Refrigerating and defrosting system with dual function liquid line
04/04/1978US4081971 Air cooled centrifugal refrigeration machine with provision to prevent evaporator freezing
09/1977
09/06/1977US4045961 Control of freezing in air-cooled steam condensers
08/1977
08/23/1977US4043144 Hot gas defrost system
07/1977
07/05/1977US4033880 Filter device
06/1977
06/07/1977US4027497 Freeze-up prevention device for a heat pump
05/1977
05/24/1977US4024722 Heat pump frost control system
05/17/1977US4023377 Defrosting system in a compression refrigerator
05/10/1977US4022032 Refrigeration system
04/1977
04/26/1977US4019341 Heat exchanging process of refrigerant gas in refrigerator
04/12/1977US4017286 Heat pump suction line vent
03/1977
03/22/1977US4012921 Refrigeration and hot gas defrost system
02/1977
02/15/1977US4007603 Apparatus for defrosting of an evaporator in a heat pump
01/1977
01/04/1977US4000626 Liquid convection fluid heat exchanger for refrigeration circuit
12/1976
12/07/1976US3995809 Arrangement for air-conditioning of one or more rooms
11/1976
11/23/1976US3992895 Defrost controls for refrigeration systems
09/1976
09/07/1976US3978684 Refrigeration system
07/1976
07/06/1976US3968045 Alkalinity reduction in an absorption refrigeration system
05/1976
05/04/1976US3953984 Piloted throttling valve
04/1976
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
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