US Patent No: 5,271,238

Number of patents in Portfolio can not be more than 2000

Environmental control system

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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An environmental control system disclosed includes a refrigeration loop including a two stage centrifugal compressor having an inlet and an outlet, a condenser having an inlet connected with the compressor outlet and an outlet, and an evaporator having an inlet connected with said condenser outlet and an outlet connected with the compressor inlet, a motor for rotating the compressor, control means responsive to evaporator load for establishing the rate of rotating said compressor, a controllable expansion valve in communication with the refrigeration loop, an expansion valve control to control the setting of the expansion valve, a bypass valve in communication with the refrigeration loop and also in communication with one stage of the compressor, wherein the bypass valve is selectively openable to allow circulated refrigerant to be variably communicated to the stage in communication therewith, and wherein the setting of the expansion valve is also a function of bypass valve operation.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
UUSI, LLCREED CITY, MI116

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hartel, Edward O Orange, CT 11 161
Hurley, John F Easton, CT 19 214
Powell, James W Guilford, CT 9 220
Voss, Mark G Franksville, WI 83 499

Cited Art Landscape

Patent Info (Count) # Cites Year
 
CARRIER CORPORATION (8)
4,362,030 Refrigeration circuit 10 1981
4,514,991 Variable speed drive motor system with inverter control 29 1983
4,527,399 High-low superheat protection for a refrigeration system compressor 35 1984
4,535,607 Method and control system for limiting the load placed on a refrigeration system upon a recycle start 15 1984
4,538,422 Method and control system for limiting compressor capacity in a refrigeration system upon a recycle start 19 1984
4,616,483 Diffuser wall control 20 1985
4,734,628 Electrically commutated, variable speed compressor control system 31 1986
4,938,029 Unloading system for two-stage compressors 13 1989
 
HITACHI, LTD. (5)
4,566,289 Refrigerator control system 32 1984
4,603,556 Control method and apparatus for an air conditioner using a heat pump 8 1985
4,662,185 System of controlling refrigerator temperature 39 1986
4,870,833 Car air conditioning apparatus and controlling method therefor 17 1987
4,877,081 Air-conditioning apparatus for automobiles 9 1989
 
CHEMICAL BANK, AS COLLATERAL AGENT (3)
4,689,967 Control and method for modulating the capacity of a temperature conditioning system 25 1985
4,715,190 Control and method for modulating the capacity of a temperature conditioning system 20 1987
4,856,286 Refrigeration compressor driven by a DC motor 67 1988
 
KABUSHIKI KAISHA TOSHIBA (2)
4,722,196 Device for controlling refrigeration cycle capacity 11 1986
4,738,118 Air conditioner 15 1987
 
Nippondenso Co., Ltd. (2)
4,582,124 Automotive air conditioning system with automatic control of refrigerator compressor capacity and heater air mixing damper 23 1985
4,646,535 Temperature and pressure monitored refrigeration system 32 1985
 
EATON CORPORATION (1)
4,794,762 Refrigerant flow control system 19 1987
 
FUJI ELECTRIC CO., LTD. (1)
4,283,920 Refrigerating device 17 1979
 
GENERAL ELECTRIC COMPANY (1)
4,667,480 Method and apparatus for controlling an electrically driven automotive air conditioner 108 1986
 
HONDA GIKEN KOGYO KABUSHIKI KAISHA (1)
4,930,320 Cooling fan controlling apparatus for vehicle with air conditioner 9 1989
 
JORGENSEN, OVE, LOVENSKJOLDSGADE 9, 6400 SONDERBORG, DENMARK (1)
4,689,968 Actuator means for the control of a refrigeration system expansion valve 9 1986
 
Kabushiki Kaisha Toyoda Jidoshokki Seisakusho (1)
4,821,527 Cooling device equipped with a variable displacement type compressor 6 1987
 
MARGAUX, INC. (1)
4,765,150 Continuously variable capacity refrigeration system 32 1987
 
MCQUAY-PERFEX, INC., A CORP. OF MN (1)
4,213,307 Oil separation and return system for centrifugal refrigerant compressors 16 1978
 
NISSAN MOTOR CO., LTD. (1)
4,914,924 Vehicle air conditioning system based on fuzzy inference 47 1988
 
SANDEN CORPORATION (1)
4,753,083 Device for controlling the capacity of a variable capacity compressor 30 1987
 
SANYO ELECTRIC CO., LTD. (1)
4,745,767 System for controlling flow rate of refrigerant 52 1987
 
THERMO KING CORPORATION (1)
4,819,441 Temperature controller for a transport refrigeration system 18 1987
 
Tokyo Shibaura Denki Kabushiki Kaisha (1)
4,407,139 Method for controlling an air conditioning system 33 1981
 
VILTER MANUFACTURING CORPORATION (1)
4,571,951 Electronic control for expansion valve in refrigeration system 33 1984
 
VISTEON GLOBAL TECHNOLOGIES, INC. (1)
4,858,676 Airconditioning system for a vehicle 36 1988
 
YORK INTERNATIONAL CORPORATION (1)
4,546,618 Capacity control systems for inverter-driven centrifugal compressor based water chillers 22 1984
 
Other [Check patent profile for assignment information] (2)
4,679,404 Temperature responsive compressor pressure control apparatus and method 32 1986
4,789,057 Tamper resistant containers 3 1988

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
CARRIER CORPORATION (1)
6,321,549 Electronic expansion valve control system 6 2000
 
DANFOSS A/S (1)
6,854,285 Controller and a method for controlling an expansion valve of a refrigeration system 10 2003
 
HITACHI APPLIANCES, INC. (1)
8,191,377 Heat source apparatus and method of starting the apparatus 0 2009
 
KABUSHIKI KAISHA TOSHIBA (1)
5,436,547 Inverter and air conditioner controlled by normal and defrost energization patterns 24 1993
 
LG ELECTRONICS INC. (1)
8,806,888 Air-conditioner with multi-stage compressor and phase separator 0 2007
 
PARKER HIROSS S.P.A. (1)
6,467,292 Control system for compressed gas refrigeration dryers 3 2001
 
XDX TECHNOLOGY LLC. (1)
7,225,627 Vapor compression system and method for controlling conditions in ambient surroundings 0 2004