Patents
Sitemap › F25 - Refrigeration or cooling; Combined heating and refrigeration systems; Heat pump systems; Manufacture or storage of ice; Liquefaction or solidification of gases › F25B - Refrigeration machines, plants, or systems; Combined heating and refrigeration systems; Heat pump systems › F25B 13 - Compression machines, plant, or systems, with reversible cycle
Patents for F25B 13 - Compression machines, plant, or systems, with reversible cycle (6,597)
07/1993
07/01/1993DE4244137A1 Vehicle air conditioning system with unidirectional fluid flow in heating and cooling modes - has valve to direct flow to outer heat-exchanger for cooling and to inner heat exchangers for heating
06/1993
06/29/1993US5222371 Air conditioner of multichamber type
06/23/1993CN1073473A Refrigeration working fluid composite
06/07/1993WO1993011210A1 Refrigeration working fluid compositions
06/01/1993US5214918 Refrigerator and method for indicating refrigerant amount
05/1993
05/26/1993EP0543622A2 Air conditioner and control apparatus therefor
05/26/1993CN1072492A Controlling apparatus for air conditioner
05/18/1993US5211029 Combined multi-modal air conditioning apparatus and negative energy storage system
05/12/1993EP0540565A1 Heating and cooling system for air space in a building
05/04/1993US5207070 Air conditioner
04/1993
04/14/1993EP0536133A1 Method and device in closed heating plants.
04/13/1993US5201195 In a heat pimp system
04/13/1993US5201185 Method of operating a transport refrigeration unit
03/1993
03/09/1993US5192022 Fuel-fired heat pump system
03/02/1993US5189887 Heat condensing furnace with de-intensifier tubes
02/1993
02/18/1993WO1993003311A1 Temperature control apparatus and a central unit for temperature control apparatus
02/18/1993CA2114938A1 Temperature control apparatus and a central unit for temperature control apparatus
02/16/1993US5186016 Defrosting control method and apparatus for air conditioner
02/16/1993US5186012 Refrigerant composition control system for use in heat pumps using non-azeotropic refrigerant mixtures
02/09/1993US5184472 Add on heat pump swimming pool heater control
01/1993
01/26/1993US5181392 Air conditioner and heat exchanger used therein
12/1992
12/29/1992US5174365 Air conditioning apparatus which selectively carries out a refrigerant collection operation
12/22/1992US5172564 Integrated heat pump with restricted refrigerant feed
12/16/1992EP0518394A2 Heat pump apparatus
12/15/1992US5170636 Heat exchanger
12/10/1992WO1992021921A1 Combined multi-modal air conditioning apparatus and negative energy storage system
12/08/1992CA1311134C High efficiency heat exchanger
11/1992
11/29/1992CA2058720A1 Combined multi-modal air conditioning apparatus and negative energy storage system
11/24/1992US5165254 For a fluid heating and cooling system
11/24/1992US5165250 Air conditioning system with thermal storage cycle control
11/24/1992US5165249 Cool/heat pump room air conditioner control circuits
11/19/1992EP0514086A2 Air conditioning apparatus
11/17/1992US5163503 Multi-type air conditioner with dew formation protection function in distribution unit
11/15/1992CA2061482A1 Integrated heat pump with restricted refrigerant feed
11/15/1992CA2061471A1 Automatic refrigerant charge variation
11/10/1992US5161388 Multi-system air-conditioning machine in which outdoor unit is connected to a plurality of indoor units
11/10/1992US5161386 Multi-system air-conditioning machine having a plurality of indoor units connected to a single outdoor unit
11/03/1992US5159817 Refrigerant path apparatus
10/1992
10/27/1992US5157934 Controller for electrically driven expansion valve of refrigerating cycle
10/21/1992EP0509952A2 Compressor head pressure control by fan cycling
10/21/1992EP0509619A2 Air conditioning system
10/20/1992US5156014 Air conditioning apparatus
10/06/1992CA1308335C Device for effecting the fine adjustment of the angular orientationsetting of a steering-wheel on a motor vehicle steering-wheel shaft
10/06/1992CA1308268C Heat pump system
09/1992
09/29/1992US5150582 Multiple air conditioning apparatus
09/09/1992EP0502609A1 Heat pump
09/09/1992CN1064347A Transport refrigeration system having means for enhancing capacity of heating cycle
09/08/1992US5144812 Outdoor fan control for variable speed heat pump
09/01/1992US5142879 Air conditioning system
09/01/1992US5142877 Multiple type air conditioning system which distributes appropriate amount of refrigerant to a plurality of air conditioning units
08/1992
08/25/1992US5140827 Automatic refrigerant charge variation means
08/22/1992CA2061562A1 Transport refrigeration system having means for enhancing the capacity of a heating cycle
08/13/1992DE4202600A1 Control circuit for air conditioning system - has time delayed switch=off for compressor to prevent overloading through back-streaming
08/11/1992US5136855 Heat pump having an accumulator with refrigerant level sensor
07/1992
07/29/1992EP0496505A2 Air-conditioning system
07/01/1992EP0492168A2 Air-conditioning apparatus
06/1992
06/23/1992US5123255 Multi-type air-conditioning system with an outdoor unit coupled to a plurality of indoor units
06/23/1992US5123254 Air conditioning apparatus connecting one outdoor unit with several indoor units through several refrigerant tubes and signal conductors
05/1992
05/26/1992US5115643 Method for operating air conditioner
05/13/1992EP0485203A1 Air conditioning system
05/05/1992US5109677 Supplemental heat exchanger system for heat pump
04/1992
04/29/1992EP0482629A1 Air-conditioning apparatus
04/28/1992US5107684 Air conditioner and operating method thereof
04/21/1992US5105629 Heat pump system
03/1992
03/31/1992US5099651 Gas engine driven heat pump method
03/31/1992CA1298383C Adaptive defrost system with ambient condition change detector
03/22/1992CA2048262A1 Control of space heating and water heating using variable speed heat pumps
03/22/1992CA2048249A1 Method for detecting and correcting reversing valve failures in heat pump systems having a variable speed compressor
03/03/1992US5092134 Heating and cooling air conditioning system with improved defrosting
02/1992
02/18/1992US5088646 Heat pump type heating apparatus and control method thereof
02/18/1992US5088296 Air conditioner system with refrigerant condition detection for refrigerant recovering operation
02/18/1992CA1295844C Method for minimizing off cycle losses of a refrigeration system during a cooling mode of operation and an apparatus using the method
02/12/1992EP0470238A1 Hot gas defrost refrigeration system
02/11/1992US5086626 Air conditioner with function for temperature control of radiant heat exchanger
02/11/1992US5086624 Cooling and heating concurrent operation type of multiple refrigeration cycle
02/06/1992WO1992001892A1 Heating and cooling system for air space in a building
02/04/1992US5085269 Hydraulically driven heating and air conditioning system for vehicles such as mobile cranes
01/1992
01/21/1992US5081848 Ground source air conditioning system comprising a conduit array for de-icing a nearby surface
01/21/1992US5081846 Control of space heating and water heating using variable speed heat pump
01/07/1992US5077983 Method and apparatus for improving efficiency of a pulsed expansion valve heat pump
12/1991
12/31/1991US5076067 Compressor with liquid injection
12/25/1991CN1015193B Compressor for heat pump and method of operating said compressor
12/24/1991US5074120 Multi-type air-conditioning system with fast hot starting for heating operation
12/17/1991CA1293310C Adaptive control system
11/1991
11/19/1991US5065588 Air-conditioner system
11/19/1991US5065586 Air conditioner with dehumidifying mode
11/12/1991US5063752 Air conditioning apparatus
10/1991
10/23/1991EP0453271A2 Air conditioning apparatus
10/15/1991US5056327 Hot gas defrost refrigeration system
10/15/1991US5056324 Transport refrigeration system having means for enhancing the capacity of a heating cycle
10/02/1991EP0449641A2 Air conditioning system
10/01/1991US5052472 LSI temperature control system
10/01/1991US5052189 Heat pump refrigeration system for a motor vehicle
09/1991
09/25/1991EP0448345A1 Air conditioning system
09/24/1991US5050397 Air conditioner apparatus with starting control for parallel operated compressors based on high pressure detection
09/24/1991US5050396 Multi-system air conditioning machine
09/17/1991US5050233 Rotary compressor
09/17/1991US5049044 Compressor for heat pump and method of operating said compressor
09/17/1991CA1288961C Integrated heat pump system
09/11/1991EP0445368A2 Cooling and heating concurrent operation type of multiple refrigeration cycle
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