Patents
Sitemap › F25 - Refrigeration or cooling; Combined heating and refrigeration systems; Heat pump systems; Manufacture or storage of ice; Liquefaction or solidification of gases › F25D - Refrigerators; Cold rooms; Ice-boxes; Cooling or freezing apparatus not covered by any other subclass › F25D 21 - Defrosting; Preventing frosting; Removing condensed or defrost water
Patents for F25D 21 - Defrosting; Preventing frosting; Removing condensed or defrost water (6,980)
09/1982
09/14/1982US4348869 Means for detecting the accumulation of frost in a low temperature refrigeration system
09/07/1982US4347710 Glass door merchandizer with tertiary air band
09/07/1982US4347709 Demand defrost sensor
09/07/1982CA1131326A1 Frost control system
08/1982
08/31/1982US4347433 Heat transfer apparatus for releasably securing heating or cooling means to pipe
08/31/1982US4346755 Two stage control circuit for reversible air cycle heat pump
08/31/1982US4346564 Defrosting control apparatus
08/31/1982CA1130847A1 Fuse circuitry
08/31/1982CA1130784A1 Apparatus for securing a heating or cooling means to a pipe
08/31/1982CA1130592A1 Open top refrigerated display case having ambient air defrost
08/24/1982US4345441 Defroster for the evaporator of a refrigerator
08/17/1982US4344295 Control for timed operation of ice maker
08/17/1982US4344294 Thermal delay demand defrost system
08/03/1982CA1129037A1 Refrigeration system control method and apparatus
07/1982
07/27/1982US4341089 Self heating refrigerator
07/27/1982US4341083 Door operating mechanism for refrigerated merchandiser display cabinet
07/27/1982US4341082 Open top refrigerated display case having ambient air defrost
07/27/1982US4341081 Multiband open front refrigerated case with air defrost
07/13/1982US4338792 Refrigerated merchandiser display case with defrost device
07/13/1982US4338790 Control and method for defrosting a heat pump outdoor heat exchanger
07/06/1982US4337626 Well type refrigerated case with defrost air intake and colliding band air defrost
06/1982
06/30/1982EP0055005A2 Cooling device
06/30/1982EP0054956A2 Cryogenic freezing system
06/30/1982EP0054955A2 Cryogenic freezing system
06/29/1982US4336692 Dual source heat pump
06/01/1982US4332142 Household refrigerator including anti-sweat heater control circuit
06/01/1982US4332141 Defrost control system for refrigeration system
06/01/1982CA1124815A1 Household refrigerator including a vacation switch
05/1982
05/26/1982EP0052323A2 Defrosting for refrigerators as required
05/19/1982EP0051893A1 A device for extracting moisture from a space
05/18/1982US4330310 Plastic mullion rail assembly for refrigerator
05/18/1982US4329852 Open top multiband refrigerated display case
05/11/1982US4328680 Heat pump defrost control apparatus
05/11/1982CA1123494A1 Heat pump system defrost control
05/04/1982US4327557 Adaptive defrost control system
05/04/1982US4327556 Fail-safe electronically controlled defrost system
04/1982
04/27/1982US4326386 Temperature control circuit for automobile air-conditioning system
04/27/1982US4326385 Refrigerated merchandiser cabinet with air defrost ports
04/20/1982US4325227 Energy efficient glass door merchandizer
04/13/1982CA1121874A1 Defrosting system using actual defrosting time as a controlling parameter
04/06/1982CA1121169A1 Open top multiband refrigerated display case
03/1982
03/30/1982US4321800 Dehumidifier structure
03/23/1982US4320631 Air defrost for low-bed refrigerated display cases, utilizing sill-mounted auxiliary fan
03/23/1982CA1120277A1 Self heating refrigerator
03/16/1982US4319463 Refrigerated display chest
03/02/1982US4317665 Cryogenic freezing system
03/02/1982CA1119227A1 Refrigerated display chest
02/1982
02/23/1982US4316365 Defrost control system for refrigeration system
02/16/1982US4315409 Cryogenic freezing system
02/09/1982US4314457 Island refrigerated display case with air defrost
02/09/1982US4314453 One and a half band refrigerated display case
02/09/1982CA1118073A1 Defrosting control system
01/1982
01/26/1982US4312190 Glass door merchandiser with heat trap
01/05/1982US4308726 Open top refrigerated display case with storage section
12/1981
12/29/1981US4308042 Heat pump with freeze-up prevention
12/16/1981EP0041911A2 Heat pumps
12/15/1981US4305259 Frost sensor employing self-heating thermistor as sensor element
12/08/1981US4304098 Method and apparatus for defrosting cooling elements in an open type freezer chest
12/08/1981CA1114038A1 Refrigeration apparatus demand defrost control system and method
12/08/1981CA1114037A1 Refrigeration apparatus demand defrost control system and method
12/01/1981US4302947 Heat pump system defrost control
12/01/1981US4302946 Refrigeration system using air defrost
11/1981
11/17/1981US4300358 Flat wall type refrigerated and chilled open display case
11/10/1981US4299095 Defrost system
11/10/1981US4299092 Energy conserving refrigerated merchandiser display case
11/03/1981US4297852 Refrigerator defrost control with control of time interval between defrost cycles
11/03/1981CA1111668A1 Refrigeration system using air defrost
11/03/1981CA1111667A1 Open top refrigerated display case with storage section
10/1981
10/27/1981CA1111269A1 Outdoor coil unit for heat pump
10/20/1981US4295340 Refrigerated display case having ambient air defrost
10/13/1981CA1110607A1 Pneumatic deicer
09/1981
09/29/1981US4291542 Air drying apparatus of the condensation type
08/1981
08/25/1981US4285204 Defrosting problem areas of refrigerated display cases
08/25/1981CA1107837A1 Frost detector
08/25/1981CA1107521A1 Household refrigerator with air circulation and cooling arrangement
08/18/1981US4283922 Air defrost system using secondary air band components
08/11/1981CA1106700A1 Multi-pane window structure
08/11/1981CA1106627A1 Method of removing frost deposits from cooling-coil batteries or the like in a freezing plant during operation, and apparatus for carrying out the method
07/1981
07/28/1981US4280334 Water condensate recovery device
07/28/1981US4280332 Defrost control monitoring fan motor temperature rise
07/28/1981CA1105975A1 Multi-pane glazed door defrosting system
07/21/1981US4279298 Heat exchanger with condensate blow-off suppressor
07/15/1981EP0031946A2 System for heat pump defrost control
07/15/1981EP0031945A2 Heat pump defrost control
07/01/1981EP0031311A2 Arrangement for keeping a freezer frost-free
06/1981
06/16/1981US4272969 Method for refrigerating fresh products and keeping them fresh, as well as refrigerator for carrying out this method
06/09/1981US4271680 Refrigerated show case
06/02/1981US4270364 Freezing refrigerator
06/02/1981CA1102231A1 Device for extracting moisture from a space
05/1981
05/26/1981US4269037 Refrigerated show case
05/26/1981US4269035 Defrost control
05/19/1981US4267706 Shop around refrigerated merchandiser
05/05/1981US4265092 Refrigerated display case using air defrost with supplemental heater
05/05/1981US4265090 Glass door merchandiser with ambient air defrost
05/05/1981US4265089 Ice making apparatus and method
05/05/1981CA1100321A1 Post condenser loop case heater controlled by ambient humidity
04/1981
04/14/1981US4261418 Outdoor coil unit for heat pump
04/14/1981US4261179 Input control system
04/07/1981US4260876 Dew point differential power controller
03/1981
03/10/1981US4254633 Control apparatus for an air conditioner
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