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WO2006110209A3 - Refrigerant system with variable speed compressor in tandem compressor application - Google Patents

Refrigerant system with variable speed compressor in tandem compressor application Download PDF

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Publication number
WO2006110209A3
WO2006110209A3 PCT/US2006/005157 US2006005157W WO2006110209A3 WO 2006110209 A3 WO2006110209 A3 WO 2006110209A3 US 2006005157 W US2006005157 W US 2006005157W WO 2006110209 A3 WO2006110209 A3 WO 2006110209A3
Authority
WO
WIPO (PCT)
Prior art keywords
refrigerant system
compressor
tandem
variable speed
application
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2006/005157
Other languages
French (fr)
Other versions
WO2006110209A2 (en
Inventor
Alexander Lifson
Michael F Taras
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Carrier Corp
Original Assignee
Carrier Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Carrier Corp filed Critical Carrier Corp
Priority to EP06720737A priority Critical patent/EP1866576A4/en
Priority to CA002598706A priority patent/CA2598706A1/en
Publication of WO2006110209A2 publication Critical patent/WO2006110209A2/en
Publication of WO2006110209A3 publication Critical patent/WO2006110209A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F24F3/153—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification with subsequent heating, i.e. with the air, given the required humidity in the central station, passing a heating element to achieve the required temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/022—Compressor control arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/07—Details of compressors or related parts
    • F25B2400/075—Details of compressors or related parts with parallel compressors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/13—Economisers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F25B2600/021—Inverters therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F25B2600/025—Compressor control by controlling speed
    • F25B2600/0251—Compressor control by controlling speed with on-off operation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F25B2600/026—Compressor control by controlling unloaders
    • F25B2600/0261—Compressor control by controlling unloaders external to the compressor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Air Conditioning Control Device (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

A refrigerant system is provided with tandem compressors. As is known, tandem compressors operate in parallel to provide a refrigerant system designer with the ability to achieve a stepped capacity control of the refrigerant system. At least one of the tandem compressors is provided with a variable speed drive. Further, at least one of the tandem compressors may be provided with the economizer and/or unloader functions. System configurations with multiple compression stages and multiple injection ports are disclosed. In this manner, the stepless capacity control can be achieved.
PCT/US2006/005157 2005-04-07 2006-02-14 Refrigerant system with variable speed compressor in tandem compressor application Ceased WO2006110209A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP06720737A EP1866576A4 (en) 2005-04-07 2006-02-14 Refrigerant system with variable speed compressor in tandem compressor application
CA002598706A CA2598706A1 (en) 2005-04-07 2006-02-14 Refrigerant system with variable speed compressor in tandem compressor application

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/101,347 US20060225445A1 (en) 2005-04-07 2005-04-07 Refrigerant system with variable speed compressor in tandem compressor application
US11/101,347 2005-04-07

Publications (2)

Publication Number Publication Date
WO2006110209A2 WO2006110209A2 (en) 2006-10-19
WO2006110209A3 true WO2006110209A3 (en) 2007-09-20

Family

ID=37081837

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2006/005157 Ceased WO2006110209A2 (en) 2005-04-07 2006-02-14 Refrigerant system with variable speed compressor in tandem compressor application

Country Status (5)

Country Link
US (1) US20060225445A1 (en)
EP (1) EP1866576A4 (en)
CN (1) CN101156029A (en)
CA (1) CA2598706A1 (en)
WO (1) WO2006110209A2 (en)

Families Citing this family (60)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7793509B2 (en) * 2004-04-12 2010-09-14 Johnson Controls Technology Company System and method for capacity control in a multiple compressor chiller system
US7628027B2 (en) * 2005-07-19 2009-12-08 Hussmann Corporation Refrigeration system with mechanical subcooling
US20070187086A1 (en) * 2006-02-14 2007-08-16 Anatoly Nikolayevich Ivanov Device for cutting slot-shaped seats in wells by hydro-sandblasting method
US9746218B2 (en) * 2006-10-26 2017-08-29 Johnson Controls Technology Company Economized refrigeration system
CN101568769A (en) * 2006-12-26 2009-10-28 开利公司 Refrigerant system with economizer, intercooler and multi-stage compressor
EP2097686A4 (en) * 2006-12-26 2010-03-10 Carrier Corp Co2 refrigerant system with tandem compressors, expander and economizer
DE102007003464B4 (en) * 2007-01-24 2012-10-18 Technotrans Ag Cooling device for printing machines
WO2008094157A1 (en) * 2007-02-02 2008-08-07 Carrier Corporation Enhanced refrigerant system
WO2008130412A1 (en) * 2007-04-23 2008-10-30 Carrier Corporation Co2 refrigerant system with booster circuit
EP2149018A4 (en) * 2007-04-24 2012-09-12 Carrier Corp Refrigerant vapor compression system with dual economizer circuits
ES2754027T3 (en) * 2007-09-24 2020-04-15 Carrier Corp Coolant system with bypass line and dedicated economized flow compression chamber
WO2009048463A1 (en) * 2007-10-10 2009-04-16 Carrier Corporation Multi-stage refrigerant system with different compressor types
US20110214439A1 (en) * 2007-10-10 2011-09-08 Alexander Lifson Tandem compressor of different types
US20090217679A1 (en) * 2008-02-28 2009-09-03 Optidyn Inc. Refrigeration cooling system control
US20090241595A1 (en) * 2008-03-27 2009-10-01 Praxair Technology, Inc. Distillation method and apparatus
US20110030397A1 (en) * 2008-06-13 2011-02-10 Taras Michael F Start-up procedure for refrigerant systems having microchemical consensor and reheat cycle
US20110079032A1 (en) * 2008-07-09 2011-04-07 Taras Michael F Heat pump with microchannel heat exchangers as both outdoor and reheat exchangers
US8192171B2 (en) * 2009-01-15 2012-06-05 Ingersoll-Rand Company Compressor system
US20120017620A1 (en) * 2009-01-20 2012-01-26 Panasonic Corporation Refrigeration cycle apparatus
JP5608991B2 (en) * 2009-03-12 2014-10-22 ダイキン工業株式会社 Refrigeration apparatus and operation method thereof
JP5308214B2 (en) * 2009-03-31 2013-10-09 三菱重工業株式会社 Turbo refrigerator and control method thereof
WO2010135407A2 (en) 2009-05-19 2010-11-25 Carrier Corporation Variable speed compressor
US8011201B2 (en) * 2009-09-30 2011-09-06 Thermo Fisher Scientific (Asheville) Llc Refrigeration system mounted within a deck
US8011191B2 (en) 2009-09-30 2011-09-06 Thermo Fisher Scientific (Asheville) Llc Refrigeration system having a variable speed compressor
US10544801B2 (en) 2009-10-21 2020-01-28 Carrier Corporation Centrifugal compressor part load control algorithm for improved performance
KR101155494B1 (en) * 2009-11-18 2012-06-15 엘지전자 주식회사 Heat pump
DE102010026648B4 (en) * 2010-07-09 2015-12-31 Gea Grasso Gmbh Refrigeration system for cooling a container
US9038404B2 (en) * 2011-04-19 2015-05-26 Liebert Corporation High efficiency cooling system
US9316424B2 (en) 2011-04-19 2016-04-19 Liebert Corporation Multi-stage cooling system with tandem compressors and optimized control of sensible cooling and dehumidification
US9845981B2 (en) 2011-04-19 2017-12-19 Liebert Corporation Load estimator for control of vapor compression cooling system with pumped refrigerant economization
CN103635763A (en) * 2011-05-16 2014-03-12 开利公司 Multi-compressor refrigeration system
FR2977656B1 (en) * 2011-07-06 2015-07-17 Electricite De France THERMAL EXCHANGE SYSTEM AND METHOD FOR CONTROLLING THERMAL POWER DEVELOPED BY SUCH THERMAL EXCHANGE SYSTEM
CN103717981B (en) * 2011-07-26 2016-08-17 开利公司 Temperature control logic for refrigeration systems
US8925346B2 (en) 2012-02-07 2015-01-06 Thermo Fisher Scientific (Asheville) Llc High performance freezer having cylindrical cabinet
DE102013200473A1 (en) * 2013-01-15 2014-07-17 Krones Ag Method and device for cooling a fermentation and / or storage tank
US9599118B2 (en) 2013-04-04 2017-03-21 Trane International Inc. System and method for controlling a system that includes fixed speed and variable speed compressors
JP6276004B2 (en) * 2013-11-19 2018-02-07 株式会社Ｎｔｔファシリティーズ refrigerator
US9759468B2 (en) * 2014-03-21 2017-09-12 Lennox Industries Inc. System for controlling operation of an HVAC system having tandem compressors
US10119738B2 (en) 2014-09-26 2018-11-06 Waterfurnace International Inc. Air conditioning system with vapor injection compressor
WO2016182135A1 (en) * 2015-05-11 2016-11-17 Lg Electronics Inc. Refrigerator and control method thereof
CN104819607B (en) * 2015-05-12 2017-04-12 广东美的暖通设备有限公司 Refrigerating system, refrigerant control method and device and air conditioner
US10871314B2 (en) 2016-07-08 2020-12-22 Climate Master, Inc. Heat pump and water heater
US10866002B2 (en) 2016-11-09 2020-12-15 Climate Master, Inc. Hybrid heat pump with improved dehumidification
US10856449B2 (en) * 2016-12-02 2020-12-01 Dell Products L.P. Dynamic cooling system
WO2018140902A1 (en) 2017-01-27 2018-08-02 Franklin Electric Co., Inc. Motor drive system including removable bypass circuit and/or cooling features
US10731901B2 (en) 2017-03-21 2020-08-04 Lennox Industries Inc. Method and apparatus for balanced fluid distribution in multi-compressor systems
US10495365B2 (en) 2017-03-21 2019-12-03 Lennox Industries Inc. Method and apparatus for balanced fluid distribution in tandem-compressor systems
US10655897B2 (en) 2017-03-21 2020-05-19 Lennox Industries Inc. Method and apparatus for common pressure and oil equalization in multi-compressor systems
US10465937B2 (en) * 2017-08-08 2019-11-05 Lennox Industries Inc. Hybrid tandem compressor system and method of use
US10935260B2 (en) 2017-12-12 2021-03-02 Climate Master, Inc. Heat pump with dehumidification
CN111954787B (en) * 2018-04-16 2023-06-27 开利公司 Double-compressor type heat pump
US11397034B2 (en) 2018-06-27 2022-07-26 Carrier Corporation Unloading system for variable speed compressor
US11592215B2 (en) 2018-08-29 2023-02-28 Waterfurnace International, Inc. Integrated demand water heating using a capacity modulated heat pump with desuperheater
CA3081986A1 (en) 2019-07-15 2021-01-15 Climate Master, Inc. Air conditioning system with capacity control and controlled hot water generation
CN110356283B (en) * 2019-07-31 2022-07-08 重庆长安汽车股份有限公司 Thermal management system of vehicle power battery
US11131491B1 (en) 2020-08-07 2021-09-28 Emerson Climate Technologies, Inc. Systems and methods for multi-stage operation of a compressor
US11994135B2 (en) * 2021-06-14 2024-05-28 Air Products And Chemicals, Inc. Method and apparatus for compressing a gas feed with a variable flow rate
US12209783B2 (en) 2021-10-26 2025-01-28 Rheem Manufacturing Company Low ambient temperature heat pump water heater systems, heat exchangers, and methods thereto
US12181189B2 (en) 2021-11-10 2024-12-31 Climate Master, Inc. Ceiling-mountable heat pump system
US11906188B2 (en) 2022-03-11 2024-02-20 Johnson Controls Tyco IP Holdings LLP Energy efficient heat pump systems and methods

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3250931A (en) * 1962-12-31 1966-05-10 James A Hardman Piston-ported volume displacement means accommodating multiple, work effecting components
US4947655A (en) * 1984-01-11 1990-08-14 Copeland Corporation Refrigeration system
US5927088A (en) * 1996-02-27 1999-07-27 Shaw; David N. Boosted air source heat pump
US6516622B1 (en) * 2000-06-13 2003-02-11 Belair Technologies, Llc Method and apparatus for variable frequency controlled compressor and fan

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2246244A (en) * 1940-06-19 1941-06-17 York Ice Machinery Corp Refrigeration
US4951475A (en) * 1979-07-31 1990-08-28 Altech Controls Corp. Method and apparatus for controlling capacity of a multiple-stage cooling system
US5265434A (en) * 1979-07-31 1993-11-30 Alsenz Richard H Method and apparatus for controlling capacity of a multiple-stage cooling system
US4748820A (en) * 1984-01-11 1988-06-07 Copeland Corporation Refrigeration system
US4787211A (en) * 1984-07-30 1988-11-29 Copeland Corporation Refrigeration system
US4895005A (en) * 1988-12-29 1990-01-23 York International Corporation Motor terminal box mounted solid state starter
DE19620105A1 (en) * 1996-04-23 1997-10-30 Bruno Pfurtscheller Operation of refrigerating plant
JP3680619B2 (en) * 1999-03-10 2005-08-10 株式会社日立製作所 Refrigeration equipment
JP3629587B2 (en) * 2000-02-14 2005-03-16 株式会社日立製作所 Air conditioner, outdoor unit and refrigeration system
DE10118444A1 (en) * 2001-04-12 2002-10-17 Linde Ag Compressor set and method for regulating a compressor set
US6434960B1 (en) * 2001-07-02 2002-08-20 Carrier Corporation Variable speed drive chiller system
JP2003129956A (en) * 2001-10-22 2003-05-08 Toyota Industries Corp Variable displacement compressor, air conditioner provided with the same, and capacity control method in the same
US6659726B2 (en) * 2001-12-31 2003-12-09 Carrier Corporation Variable speed control of multiple motors
KR100471442B1 (en) * 2002-07-03 2005-03-08 엘지전자 주식회사 Control Method of air-conditioner using multi-compressors
JP4214021B2 (en) * 2003-08-20 2009-01-28 ヤンマー株式会社 Engine heat pump
US6883341B1 (en) * 2003-11-10 2005-04-26 Carrier Corporation Compressor with unloader valve between economizer line and evaporator inlet
US6928828B1 (en) * 2004-01-22 2005-08-16 Carrier Corporation Tandem compressors with economized operation
US7096681B2 (en) * 2004-02-27 2006-08-29 York International Corporation System and method for variable speed operation of a screw compressor
US6973797B2 (en) * 2004-05-10 2005-12-13 York International Corporation Capacity control for economizer refrigeration systems

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3250931A (en) * 1962-12-31 1966-05-10 James A Hardman Piston-ported volume displacement means accommodating multiple, work effecting components
US4947655A (en) * 1984-01-11 1990-08-14 Copeland Corporation Refrigeration system
US5927088A (en) * 1996-02-27 1999-07-27 Shaw; David N. Boosted air source heat pump
US6516622B1 (en) * 2000-06-13 2003-02-11 Belair Technologies, Llc Method and apparatus for variable frequency controlled compressor and fan

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP1866576A4 *

Also Published As

Publication number Publication date
EP1866576A4 (en) 2010-07-21
CN101156029A (en) 2008-04-02
EP1866576A2 (en) 2007-12-19
US20060225445A1 (en) 2006-10-12
WO2006110209A2 (en) 2006-10-19
CA2598706A1 (en) 2006-10-19

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