[특허]Variable speed parallel centrifugal compressors for HVAC and refrigeration systems

Variable speed parallel centrifugal compressors for HVAC and refrigeration systems 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F25B-007/00 F04B-041/06
출원번호	US-0937984 (1997-09-26)
발명자 / 주소	Shaw David N. Agrawal Giridhari L.
대리인 / 주소	Fishman, Dionne, Cantor & Colburn
인용정보	피인용 횟수 : 30 인용 특허 : 0

초록

A plurality of variable speed centrifugal compressors operated in parallel form an HVAC or refrigeration system. The compressors are operated at proportionally synchronized speeds throughout their range of operation.

대표청구항 ▼

[ What is claimed is:] [1.] An HVAC or refrigeration system, including:at least two centrifugal compressors operable in parallel;speed control means for operating said compressors at proportionally synchronized speeds;evaporator means connected to supply evaporated refrigerant to said compressors, said evaporator means having said refrigerant in heat exchange communication with an evaporator fluid flowing through said evaporator;first sensor means for sensing the temperature of said evaporator fluid flowing to said evaporator and for generating a first signal commensurate with said temperature;second sensor means for sensing the temperature of said evaporator fluid flow from said evaporator means and for generating a second signal commensurate with said temperature;condenser means supplied with a fluid to be in heat exchange communication with compressed refrigerant fluid;flow conduit means for delivering compressed refrigerant fluid from said compressors to said condenser means;third sensor means for sensing system condensing pressure in said conduit means and for generating a third signal commensurate with said pressure;fourth sensing means for sensing the temperature of heat exchange fluid entering said condenser end for generating a fourth signal commensurate with said temperature;system controller means, said system controller means being connected to receive said first, second, third and fourth signals, and air conditioning or refrigeration requirements;said system controller means being connected to said speed control means to operate said centrifugal compressors in parallel at proportionally synchronized speeds in response to changes in said second signal; andsaid system controller means being effective to selectively discontinue operation of one of said compressors while operating the other of said compressors at a speed sufficient to prevent surge of said other compressor in response to changes in said third and fourth signals.

이 특허를 인용한 특허 (30)

Haley, Paul F.; Dorman, Dennis R.; Hamm, Jr., Frederic Byron; Foye, David M.; Kwiatkowski, James A.; James, Rick T.; Janssen, Randall L.; Plzak, William J., Centrifugal compressor assembly and method.
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Haley, Paul F.; Dorman, Dennis R.; Hamm, Jr., Frederic Byron; Foye, David M.; Kwiatkowski, James A.; James, Rick T.; Janssen, Randall L.; Plzak, William J., Centrifugal compressor assembly and method.
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Haley, Paul F.; James, Rick T., Centrifugal compressor assembly and method.
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Haley, Paul H.; Dorman, Dennis R.; Hamm, Jr., Frederic Byron; Foye, David M.; Kwiatkowski, James A.; James, Rick T.; Janssen, Randall L.; Plzak, William J., Centrifugal compressor assembly and method.
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Wilson, Walter, Centrifugal turbine blower with gas foil bearings.
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Stellnert, Mats; Sjölund, Martin, Controllable vacuum source.
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Lifson,Alexander; Taras,Michael F.; Fraser, Jr.,Howard H., Fault recognition in systems with multiple circuits.
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Nelson, Alexander R.; Buckley, Charles W.; Agrawal, Giridhari L., Foil bearing supported motor with adjustable thrust bearing cap.
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Nelson, Alexander R.; Buckley, Charles W.; Agrawal, Giridhari L., Foil bearing supported motor with housingless stator.
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Agrawal, Giridhari L.; Buckley, Charles William; Shakil, Ali, Foil gas bearing supported high temperature centrifugal blower and method for cooling thereof.
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Lesage,Ga？tan; Kantchev,Jordan, Heat reclaim refrigeration system and method.
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Agrawal, Giridhari L.; Buckley, Charles W.; Rajendran, Muthusamy, Mechanically-coupled turbomachinery configurations and cooling methods for hermetically-sealed high-temperature operation.
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Idensjo, Henrik, Method in a milking system for creating a required vacuum level and computer program products.
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Crane,Curtis Christian; Slothower,Scott Victor, Motor disconnect arrangement for a variable speed drive.
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Agrawal, Giridhari L.; Buckley, Charles W.; Knechel, Jared, Oil-free water vapor blower.
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Hartman, Thomas B., Sequencing of variable speed compressors in a chilled liquid cooling system for improved energy efficiency.
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Bodell, II, Mark Robinson; Miller, Wanda Jean, Stability control system and method for compressors operating in parallel.
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Crane,Curtis Christian; Lindberg,Gail Elaine, Startup control system and method for a multiple compressor chiller system.
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Crane, Curtis C., System and method for capacity control in a multiple compressor chiller system.
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Crane, Cutis Christian; Federman, Israel, System and method for capacity control in a multiple compressor chiller system.
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Crane,Curtis Christian; Federman,Israel, System and method for capacity control in a multiple compressor chiller system.
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Wills,Frank Eugene; Schnetzka,Harold Robert, System and method for increasing output horsepower and efficiency in a motor.
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Crane, Curtis Christian; Gallus, Brian T., System and method for lowering a temperature of liquid exiting a heat exchanger in a vapor compression system.
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Schnetzka,Harold Robert; Eichelberger, Jr.,E. Curtis; Nemit, Jr.,Paul, System and method for noise attenuation of screw compressors.
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Wills,Frank Eugene; Schnetzka,Harold Robert; Kester,Douglas Alan; Judge,John F.; Valiya Naduvath,Mahesh; Federman,Israel, System and method for variable speed operation of a screw compressor.
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Hartman Thomas B., System for sequencing chillers in a loop cooling plant and other systems that employ all variable-speed units.
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Agrawal, Giridhari L.; Buckley, Charles W.; Shakil, Ali; Coward, Andrew Hamilton, Ultra high pressure turbomachine for waste heat recovery.
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Rousseau,William H., Variable speed drive chiller system.
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William H. Rousseau, Variable speed drive chiller system.
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Federman,Israel; Schnetzka,Harold Robert, Variable speed drive for multiple loads.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Variable speed parallel centrifugal compressors for HVAC and refrigeration systems 원문보기

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Variable speed parallel centrifugal compressors for HVAC and refrigeration systems 원문보기

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이 특허를 인용한 특허 (30)

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