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)
09/1991
09/10/1991US5046325 Refrigerating circuit apparatus with two stage compressor and heat storage tank
09/10/1991US5046323 Multi-system air conditioner
09/10/1991CA1288606C Heat pump system with hot water device
09/05/1991WO1991013298A1 Hot gas defrost refrigeration system
09/05/1991CA2053296A1 Hot gas defrost refrigeration system
09/03/1991US5044425 Air conditioner having a refrigerant heater
09/03/1991US5044172 Air conditioning apparatus
08/1991
08/27/1991US5042264 Method for detecting and correcting reversing valve failures in heat pump systems having a variable speed compressor
08/20/1991US5040376 Air-conditioning apparatus having indoor units connected to one outdoor unit via one branch unit
08/13/1991US5038580 Heat pump system
07/1991
07/24/1991CN1013300B Air-conditioning apparatus
07/09/1991WO1991010868A1 Method and device in closed heating plants
07/09/1991US5029449 Heat pump booster compressor arrangement
06/1991
06/25/1991US5025638 Duct type air conditioner and method of controlling the same
06/25/1991US5025634 Heating and cooling apparatus
06/18/1991CA1284892C Triple integrated heat pump circuit
06/12/1991EP0431760A2 A method for air conditioning and supplying hot/cold water
06/12/1991EP0431491A1 Heat pump type heating apparatus and control method thereof
06/05/1991CN1051971A Method for air conditioning and supplying hot/cold water
06/04/1991US5020320 Engine driven heat pump system
05/1991
05/28/1991US5018367 Cooling energy generator with cooling energy accumulator
05/25/1991CA2029445A1 Method for air conditioning and supplying hot/cold water
05/07/1991US5012651 Heat pump apparatus
05/02/1991EP0424474A1 Method of operating a vapour compression cycle under trans- or supercritical conditions.
04/1991
04/25/1991DE4033551A1 Air-conditioning system for vehicle with rotary cab - includes radiator valve opened for heating or dehumidification, or both, but closed for air-cooling mode
04/23/1991US5009078 Multi-system air conditioning machine
04/23/1991US5009077 Multi-system air conditioner
04/10/1991EP0421459A2 Air conditioning apparatus
04/02/1991US5003788 Gas engine driven heat pump system
03/1991
03/19/1991US5000011 Engine driven air conditioning apparatus
03/12/1991CA1281394C Welded contact safety technique
02/1991
02/26/1991US4995241 High efficiency heat exchanger
02/19/1991US4993483 Geothermal heat transfer system
02/05/1991US4989414 Capacity-controllable air conditioner
01/1991
01/30/1991EP0410570A2 Air conditioner apparatus with starting control for parallel operated compressors based on high pressure detection
01/29/1991US4987747 Air conditioning device
01/23/1991EP0409000A1 A dual-operation mode air conditioning apparatus
01/01/1991US4981023 Air conditioning and heat pump system
12/1990
12/18/1990US4977953 Latent heat regenerating apparatus
12/12/1990EP0402131A2 Cooling system with supplemental thermal storage
12/12/1990CN1047729A Method and device of compressed refrigeration cycle with compression pump
11/1990
11/27/1990US4972676 Refrigeration cycle apparatus having refrigerant separating system with pressure swing adsorption
11/14/1990CN1046973A Pump pressure type compression refrigeration cycle method and device
10/1990
10/16/1990US4962647 Refrigerating circuit apparatus with two stage compressor and heat storage tank
09/1990
09/18/1990CA1274094A1 Reverse cycle heat reclaim coil and subcooling method
09/13/1990DE3907201A1 Air-conditioning system for motor vehicles having a circuit which can be switched over from cooling to heating
09/12/1990CN1045291A Compressor for heat pump and method of operating said compressor
09/05/1990EP0385560A2 Compressor for heat pump and method of operating said compressor
09/04/1990US4954252 Biflow filter drier
07/1990
07/31/1990US4944156 Air conditioning system into which a refrigerator or a warming cabinet is integrated, and power source circuit therefor
07/24/1990US4943003 Control device for heat pump with hot-water supply facility
07/24/1990US4942743 Hot gas defrost system for refrigeration systems
07/12/1990WO1990007683A1 Trans-critical vapour compression cycle device
07/11/1990EP0377329A2 Heat pump apparatus
07/10/1990US4940079 Optimal control system for refrigeration-coupled thermal energy storage
07/03/1990US4938094 Device for effecting the fine adjustment of the angular orientation of a steering-wheel on a motor vehicle steering-wheel shaft
07/03/1990US4938032 Air-conditioning system
06/1990
06/27/1990CN1043380A Air-conditioning apparatus
06/26/1990US4936107 External heat exchange unit with plurality of heat exchanger elements and fan devices and method for controlling fan devices
06/23/1990CA2001221A1 Heat pump fan control
06/12/1990US4932220 Air conditioner system with optimum high pressure control function
06/12/1990US4932219 Transport refrigeration system with selective receiver tank pressurization
06/12/1990US4932215 Control apparatus for multi-air-conditioner system
06/05/1990US4930322 Advanced heat pump
05/1990
05/23/1990CN1008131B Air conditioning apparatus
05/22/1990US4926653 Multi-room type air-conditioning equipment
05/22/1990US4926652 Air conditioner system with control for optimum refrigerant temperature
05/15/1990US4924681 Combined heat pump and domestic water heating circuit
05/08/1990US4922726 Heat pump system
05/01/1990US4920757 Geothermal heating and air conditioning system
04/1990
04/25/1990EP0364834A2 Air conditioning device
04/24/1990US4918936 Refrigerating cycle utilizing cold accumulation material
04/17/1990US4916913 Air conditioning apparatus having two refrigerating circuits in central unit and control method of defrosting the same
04/11/1990EP0191801B1 Residential heating, cooling and energy management system
04/03/1990US4912937 Air conditioning apparatus
03/1990
03/20/1990US4909044 Parked automobile thermal control system
03/20/1990US4909041 Residential heating, cooling and energy management system
03/13/1990CA1266571A1 Hot water heating and defrost in a heat pump circuit
03/08/1990WO1990002300A1 Heat pump for heating or cooling confined spaces, and also for heating tap water
03/06/1990US4905894 Refrigerant heating type air conditioner
02/1990
02/06/1990US4898230 Air conditioner with an energy switch
01/1990
01/16/1990US4893476 Three function heat pump system with one way receiver
12/1989
12/26/1989US4888957 System and method for refrigeration and heating
12/05/1989US4885017 Heat transfer unit
12/05/1989US4884414 Adaptive defrost system
11/1989
11/28/1989US4882908 Demand defrost control method and apparatus
11/07/1989US4878357 Air-conditioning apparatus
11/02/1989EP0339267A2 Air conditioning apparatus
10/1989
10/31/1989US4876859 Multi-type air conditioner system with starting control for parallel operated compressors therein
10/03/1989US4870831 Multi-type air conditioner system with oil level control for parallel operated compressor therein
09/1989
09/26/1989US4869074 Regenerative refrigeration cycle apparatus and control method therefor
09/26/1989US4869073 Air conditioner with automatic selection and re-selection function for operating modes
09/19/1989US4866944 Air conditioner system with function for protecting electric circuit in outdoor unit
09/05/1989US4862705 Air conditioner
08/1989
08/29/1989US4860552 Heat pump fan control
08/15/1989US4856578 Multi-function self-contained heat pump system
08/15/1989US4856286 Refrigeration compressor driven by a DC motor
08/01/1989US4852360 Heat pump control system
07/1989
07/25/1989US4850204 Adaptive defrost system with ambient condition change detector
07/04/1989US4843838 Air-to-air heat pump
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