| Patents for F25B 47 - Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass (3,979) |
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| 03/24/1981 | US4257795 Compressor heat pump system with maximum and minimum evaporator ΔT control |
| 02/24/1981 | US4251999 Defrosting control system |
| 01/27/1981 | US4246760 Non-reverse hot gas defrost system |
| 01/20/1981 | CA1093849A1 Energy conservation system having improved means for controlling receiver pressure |
| 01/13/1981 | CA1093329A1 Multiple compressor heat pump with coordinated design |
| 01/07/1981 | EP0020332A1 A method for running a cooling-heating pump |
| 12/23/1980 | US4240269 Heat pump system |
| 12/10/1980 | EP0019736A2 Heat pump system |
| 11/04/1980 | US4231229 Energy conservation system having improved means for controlling receiver pressure |
| 10/14/1980 | CA1087409A1 Heat exchange system using refrigerant |
| 08/05/1980 | US4215817 Devices for heating premises by the use of heat pumps and method therefor |
| 08/05/1980 | US4215555 Hot gas defrost system |
| 07/22/1980 | US4213306 Method and apparatus for increasing air conditioner efficiency |
| 07/01/1980 | US4210001 Refrigeration system having improved heat transfer and reduced power requirement for various evaporative refrigerants |
| 05/29/1980 | WO1980001102A1 A method for running a cooling-heating pump |
| 04/15/1980 | US4197716 Refrigeration system with auxiliary heat exchanger for supplying heat during defrost cycle and for subcooling the refrigerant during a refrigeration cycle |
| 03/25/1980 | US4194367 Apparatus for producing ice |
| 03/11/1980 | US4192150 Defrosting arrangement for a refrigerator |
| 03/11/1980 | CA1073230A1 Method and apparatus for defrosting a refrigeration system |
| 03/11/1980 | CA1073229A1 Control system for heat pump and furnace combination |
| 01/29/1980 | US4185467 Icemaker liquid refrigerant defrost system |
| 01/22/1980 | US4184341 Suction pressure control system |
| 01/08/1980 | US4182133 Humidity control for a refrigeration system |
| 12/18/1979 | US4178767 Reverse fan heat pump defrost control system |
| 12/04/1979 | US4176526 Refrigeration system having quick defrost and re-cool |
| 10/23/1979 | US4171622 Heat pump including auxiliary outdoor heat exchanger acting as defroster and sub-cooler |
| 10/23/1979 | US4171621 Freeze protection device in heat pump system |
| 09/25/1979 | CA1062927A1 Refrigeration system utilizing saturated gaseous refrigerant for defrost purposes |
| 09/11/1979 | US4167102 Refrigeration system utilizing saturated gaseous refrigerant for defrost purposes |
| 07/31/1979 | CA1059329A1 Two stage compressor heating |
| 06/26/1979 | US4158950 Heat pump defrost system |
| 06/12/1979 | US4157649 Multiple compressor heat pump with coordinated defrost |
| 05/22/1979 | CA1054811A1 Heat pump control system |
| 05/01/1979 | US4151722 Automatic defrost control for refrigeration systems |
| 04/17/1979 | USRE29966 Heat pump with frost-free outdoor coil |
| 03/06/1979 | CA1049798A1 Hot gas defrost system with dual function liquid line |
| 02/13/1979 | US4139356 Refrigerating apparatus |
| 01/23/1979 | CA1046783A1 Heat pump frost control system |
| 01/23/1979 | CA1046782A1 Room heating devices with heat pumps |
| 01/09/1979 | CA1045840A1 Hot gas defrost system |
| 12/12/1978 | CA1044032A1 Refrigeration and hot gas defrost system |
| 11/28/1978 | CA1043116A1 Compressor refrigeration plant |
| 11/07/1978 | US4123914 Energy saving change of phase refrigeration system |
| 11/07/1978 | CA1041782A1 Control means for refrigeration systems |
| 10/31/1978 | US4122892 Devices for heating premises by the use of heat pumps and method therefor |
| 10/31/1978 | US4122688 Refrigerating system |
| 10/31/1978 | US4122686 Method and apparatus for defrosting a refrigeration system |
| 09/05/1978 | US4110997 Hot gas defrost system |
| 08/08/1978 | US4105064 Two stage compressor heating |
| 08/08/1978 | US4104888 Defrost control for heat pumps |
| 07/25/1978 | US4102391 Heat pump frost control system |
| 07/25/1978 | US4102390 Control system for heat pump and furnace combination |
| 07/25/1978 | US4102389 Heat pump control system |
| 07/25/1978 | US4102151 Hot gas defrost system with dual function liquid line |
| 06/27/1978 | US4096708 Compressor refrigeration plant |
| 06/20/1978 | US4095438 Refrigeration system with hot gas defrost |
| 06/13/1978 | US4094168 Ice making refrigeration system |
| 04/11/1978 | US4083196 Compressor refrigeration plant |
| 04/11/1978 | US4083195 Refrigerating and defrosting system with dual function liquid line |
| 04/04/1978 | US4081971 Air cooled centrifugal refrigeration machine with provision to prevent evaporator freezing |
| 09/06/1977 | US4045961 Control of freezing in air-cooled steam condensers |
| 08/23/1977 | US4043144 Hot gas defrost system |
| 07/05/1977 | US4033880 Filter device |
| 06/07/1977 | US4027497 Freeze-up prevention device for a heat pump |
| 05/24/1977 | US4024722 Heat pump frost control system |
| 05/17/1977 | US4023377 Defrosting system in a compression refrigerator |
| 05/10/1977 | US4022032 Refrigeration system |
| 04/26/1977 | US4019341 Heat exchanging process of refrigerant gas in refrigerator |
| 04/12/1977 | US4017286 Heat pump suction line vent |
| 03/22/1977 | US4012921 Refrigeration and hot gas defrost system |
| 02/15/1977 | US4007603 Apparatus for defrosting of an evaporator in a heat pump |
| 01/04/1977 | US4000626 Liquid convection fluid heat exchanger for refrigeration circuit |
| 12/07/1976 | US3995809 Arrangement for air-conditioning of one or more rooms |
| 11/23/1976 | US3992895 Defrost controls for refrigeration systems |
| 09/07/1976 | US3978684 Refrigeration system |
| 07/06/1976 | US3968045 Alkalinity reduction in an absorption refrigeration system |
| 05/04/1976 | US3953984 Piloted throttling valve |
| 04/20/1976 | US3950962 System for defrosting in a heat pump |
| 02/17/1976 | US3938352 Water to air heat pump employing an energy and condensate conservation system |