US Patent No: 4,745,767

Number of patents in Portfolio can not be more than 2000

System for controlling flow rate of refrigerant

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A system for controlling the flow rate of a refrigerant for refrigeration cycles which comprises an electronic expansion valve disposed at the inlet of an evaporator and a controller for controlling the opening-closing movement of the valve. The controller comprises a calculating unit for comparing the degree of superheat of the refrigerant measured at the evaporator with a preset degree of superheat and feeding a valve opening adjusting signal to the valve according to the value obtained by the comparison, and a valve full-closing signal generator for comparing the measured temperature of the space to be cooled with a preset temperature and feeding a valve full-closing signal to the valve based on the value obtained from the comparison of temperatures, in preference to the opening adjusting signal.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
SANYO ELECTRIC CO., LTD.OSAKA3153

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hoshi, Katsuhiko Ohta, JP 5 142
Ohya, Satoshi Ohizumi, JP 21 188

Cited Art Landscape

Patent Info (Count) # Cites Year
 
CARRIER CORPORATION (1)
* 4,523,436 Incrementally adjustable electronic expansion valve 55 1983
 
Elsag International B.V. (1)
* 4,459,818 Supervisory control of chilled water temperature 11 1983
* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
OBLAMATIK AG (2)
* 9,267,694 Method and system for controlling the temperature of components 0 2013
* 2013/0220,590 METHOD AND SYSTEM FOR CONTROLLING THE TEMPERATURE OF COMPONENTS 1 2013
 
XDX GLOBAL LLC (1)
9,127,870 Surged vapor compression heat transfer systems with reduced defrost requirements 0 2010
 
HITACHI, LTD. (1)
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ICE ENERGY TECHNOLOGIES, INC. (1)
* 2009/0133,412 THERMAL ENERGY STORAGE AND COOLING SYSTEM WITH MULTIPLE COOLING LOOPS UTILIZING A COMMON EVAPORATOR COIL 7 2008
 
CARRIER CORPORATION (2)
* 6,148,628 Electronic expansion valve without pressure sensor reading 13 1999
6,318,100 Integrated electronic refrigerant management system 20 2000
 
EMERSON CLIMATE TECHNOLOGIES, INC. (26)
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7,905,098 Compressor diagnostic and protection system and method 19 2005
7,878,006 Compressor diagnostic and protection system and method 10 2005
8,590,325 Protection and diagnostic module for a refrigeration system 3 2007
* 2008/0209,925 PROTECTION AND DIAGNOSTIC MODULE FOR A REFRIGERATION SYSTEM 29 2007
8,393,169 Refrigeration monitoring system and method 7 2008
9,140,728 Compressor sensor module 0 2008
8,160,827 Compressor sensor module 4 2008
8,475,136 Compressor protection and diagnostic system 2 2010
* 2010/0111,709 COMPRESSOR PROTECTION AND DIAGNOSTIC SYSTEM 4 2010
8,474,278 Compressor diagnostic and protection system and method 2 2011
8,335,657 Compressor sensor module 2 2011
9,304,521 Air filter monitoring system 0 2011
9,310,094 Portable method and apparatus for monitoring refrigerant-cycle systems 0 2012
8,964,338 System and method for compressor motor protection 0 2013
9,046,900 Method and apparatus for monitoring refrigeration-cycle systems 0 2013
9,194,894 Compressor sensor module 0 2013
9,086,704 Method and apparatus for monitoring a refrigeration-cycle system 0 2013
9,081,394 Method and apparatus for monitoring a refrigeration-cycle system 0 2013
9,023,136 Method and apparatus for monitoring a refrigeration-cycle system 0 2013
9,021,819 Method and apparatus for monitoring a refrigeration-cycle system 0 2013
9,017,461 Method and apparatus for monitoring a refrigeration-cycle system 0 2013
8,974,573 Method and apparatus for monitoring a refrigeration-cycle system 1 2013
9,480,177 Compressor protection module 0 2013
9,121,407 Compressor diagnostic and protection system and method 0 2013
9,310,439 Compressor having a control and diagnostic module 0 2013
 
Ecoair Corp. (3)
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STARGATE INTERNATIONAL, INC. (2)
* 7,234,313 HVAC monitor and superheat calculator system 14 2004
* 2006/0090,484 HVAC monitor and superheat calculator system 0 2004
 
THERMO KING CORPORATION (1)
* 2006/0248,904 Temperature control system and method of operating the same 5 2006
 
GENERAL ELECTRIC COMPANY (12)
* 5,285,648 Differential pressure superheat sensor for low refrigerant charge detection 10 1992
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* 5,301,514 Low refrigerant charge detection by monitoring thermal expansion valve oscillation 18 1992
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* 5,431,026 Refrigerant flow rate control based on liquid level in dual evaporator two-stage refrigeration cycles 60 1994
* 5,426,952 Refrigerant flow rate control based on evaporator exit dryness 46 1994
* 5,415,008 Refrigerant flow rate control based on suction line temperature 47 1994
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* 5,425,246 Refrigerant flow rate control based on evaporator dryness 17 1994
* 5,546,757 Refrigeration system with electrically controlled expansion valve 55 1994
* 5,586,445 Low refrigerant charge detection using a combined pressure/temperature sensor 64 1994
* 6,438,978 Refrigeration system 21 1998
 
SIEMENS AKTIENGESELLSCHAFT (1)
* 2007/0150,305 Method for selecting a potential participant for a medical study on the basis of a selection criterion 5 2005
 
ELECTROLUX HOME PRODUCTS, INC. (1)
8,375,734 Fresh food ice maker control 0 2009
 
UUSI, LLC (1)
* 5,271,238 Environmental control system 8 1992
 
EMERSON ELECTRIC CO. (1)
9,285,802 Residential solutions HVAC monitoring and diagnosis 0 2012
 
GREENER-ICE SPV, L.L.C. (3)
9,203,239 System and method for improving grid efficiency utilizing statistical distribution control 0 2012
9,212,834 System and method for liquid-suction heat exchange thermal energy storage 0 2012
8,528,345 Managed virtual power plant utilizing aggregated storage 0 2012
 
ROBERTSHAW CONTROLS COMPANY (2)
* 4,848,652 Vehicle engine coolant system and method of making the same 10 1988
* 4,969,628 Valve construction and method of making the same 14 1989
 
RANCO INCORPORATED OF DELAWARE (2)
* 5,177,973 Refrigeration system subcooling flow control valve 3 1991
* 5,156,017 Refrigeration system subcooling flow control valve 3 1991
 
COPELAND CORPORATION LLC (2)
* 5,502,970 Refrigeration control using fluctuating superheat 34 1995
* 5,771,703 Refrigeration control using fluctuating superheat 24 1996
 
COPELAND CORPORATION (1)
* 5,311,748 Control system for heat pump having decoupled sensor arrangement 11 1992
 
SPX CORPORATION (1)
* 5,231,842 Refrigerant handling system with liquid refrigerant and multiple refrigerant capabilities 10 1992
 
Kuba Kaltetechnik GmbH (1)
* 5,233,841 Method of optimising the performance of refrigerant vaporizers including improved frost control method and apparatus 28 1991
 
XDX INNOVATIVE REFRIGERATION, LLC (1)
* 2005/0092,002 Expansion valves, expansion device assemblies, vapor compression systems, vehicles, and methods for using vapor compression systems 3 2004
 
SANYO ELECTRIC CO., LTD. (1)
* 5,442,926 Control system for air-conditioner 8 1994
 
WINSLOW, JOHN M. (1)
* 5,209,400 Portable calculator for refrigeration heating and air conditioning equipment service 52 1991
 
DELTA DESIGN, INC. (2)
6,993,922 Apparatus and method for controlling the temperature of an electronic device under test 25 2003
* 2004/0139,756 Apparatus and method for controlling the temperature of an electronic device under test 2 2003
 
MITSUBISHI ELECTRIC CORPORATION (4)
8,899,058 Air conditioner heat pump with injection circuit and automatic control thereof 0 2006
RE43998 Refrigeration/air conditioning equipment 0 2010
RE43805 Refrigeration/air conditioning equipment 0 2010
* 2010/0192,607 AIR CONDITIONER/HEAT PUMP WITH INJECTION CIRCUIT AND AUTOMATIC CONTROL THEREOF 1 2010
 
EUBANK MANUFACTURING ENTERPRISES, INC., LONGVIEW, TX (1)
* 4,967,830 Arcuate tubular evaporator heat exchanger 8 1990
 
Sundstrand Corporation (1)
* 5,109,676 Vapor cycle system evaporator control 30 1990
 
DAIKIN INDUSTRIES, LTD. (1)
* 7,788,937 Refrigeration system 7 2006
 
FORD GLOBAL TECHNOLOGIES, LLC (2)
* 8,555,661 Air conditioning system for a motor vehicle and method for its operation 0 2008
* 2009/0049,848 Air Conditioning System for a Motor Vehicle and Method for its Operation 1 2008
 
SITTING MAN, LLC (1)
* 9,459,029 Valve controller, valve controlling method, refrigeration and cold storage system, device and method for controlling the system 0 2010
 
B/E AEROSPACE, INC. (2)
* 6,109,047 Systems and methods for capacity regulation of refrigeration systems 12 1998
6,209,334 Systems and methods for capacity regulation of refrigeration systems 7 2000
 
SANDEN CORPORATION (1)
* 2007/0028,633 Air Conditioning Systems For Vehicles 1 2006
 
TOKYO ELECTRON LIMITED (1)
* 6,629,423 Processor and temperature control method therefor 11 2002
* Cited By Examiner