US20180156505A1 - Methods and systems for controlling integrated air conditioning systems - Google Patents

Methods and systems for controlling integrated air conditioning systems Download PDF

Info

Publication number
US20180156505A1
US20180156505A1 US15/888,504 US201815888504A US2018156505A1 US 20180156505 A1 US20180156505 A1 US 20180156505A1 US 201815888504 A US201815888504 A US 201815888504A US 2018156505 A1 US2018156505 A1 US 2018156505A1
Authority
US
United States
Prior art keywords
air conditioning
conditioning unit
cooling mode
working fluid
unit
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.)
Pending
Application number
US15/888,504
Inventor
Batung Pham
Pierre Delpech
Philippe Rigal
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 Global 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
Priority to PCT/US2007/020170 priority Critical patent/WO2009038552A1/en
Priority to US12/674,135 priority patent/US9909790B2/en
Application filed by Carrier Corp filed Critical Carrier Corp
Priority to US15/888,504 priority patent/US20180156505A1/en
Assigned to CARRIER CORPORATION reassignment CARRIER CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DELPECH, PIERRE, PHAM, BATUNG, RIGAL, PHILIPPE
Publication of US20180156505A1 publication Critical patent/US20180156505A1/en
Pending legal-status Critical Current

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B25/00Machines, plant, or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2400/00General 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
    • F25B2400/04Refrigeration circuit bypassing means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2400/00General 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
    • F25B2400/04Refrigeration circuit bypassing means
    • F25B2400/0401Refrigeration circuit bypassing means for the compressor
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2400/00General 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
    • F25B2400/04Refrigeration circuit bypassing means
    • F25B2400/0411Refrigeration circuit bypassing means for the expansion valve or capillary tube
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2400/00General 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
    • F25B2400/06Several compression cycles arranged in parallel
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2500/00Problems to be solved
    • F25B2500/31Low ambient temperatures
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D15/00Devices not covered by group F25D11/00 or F25D13/00, e.g. non-self-contained movable devices
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D16/00Devices using a combination of a cooling mode associated with refrigerating machinery with a cooling mode not associated with refrigerating machinery
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/02Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating liquids, e.g. brine

Abstract

An integrated air conditioning system having a first air conditioning unit having a first evaporator with a first input and a first output; a second air conditioning unit having a second evaporator with a second input and a second output; a first conduit fluidly connecting the first input with the second output; a second conduit fluidly connecting the second input with the first output. The first and second conduits and the first and second evaporators form a working fluid circuit.

Description

    CROSS-REFERENCE TO RELATED APPLICATIONS
  • This application is a divisional application of U.S. patent application Ser. No. 12/674,135 filed Feb. 18, 2010, and further claims the benefit of an earlier filing date from PCT/US2007/020170, filed Sep. 18, 2007, the contents of which are incorporated by reference herein in their entirety.
  • BACKGROUND OF THE INVENTION 1. Field of the Invention
  • The present disclosure is related to air conditioning systems. More particularly, the present disclosure is related to methods and systems for controlling integrated air conditioning systems having at least two air conditioning systems.
  • 2. Description of Related Art
  • During the typical operation of air conditioning systems, the system is run in a cooling mode wherein energy is expended by operating a compressor. The compressor compresses and circulates a refrigerant to chill or condition a working fluid, such as air or other secondary loop fluid (e.g., chilled water or glycol), in a known manner. The conditioned working fluid can then be used in a refrigerator, a freezer, a building, an automobile, and other spaces with climate controlled environment.
  • However, when the outside ambient temperature is low, there exists the possibility that the outside ambient air itself may be utilized to provide cooling to the working fluid without engaging the compressor. When the outside ambient air is used by an air conditioning system to condition the working fluid, the system is referred to as operating in a free-cooling mode.
  • As noted above, traditionally, even when the ambient outside air temperature is low, the air conditioning system is run in the cooling mode. Running in cooling mode under such conditions provides a low efficiency means of conditioning the working fluid. In contrast, running the air conditioning system under such conditions in a free-cooling mode is more efficient. In the free-cooling mode, one or more ventilated heat exchangers and pumps are activated so that the refrigerant is circulated by the pumps and is cooled by the outside ambient air. In this manner, the refrigerant, cooled by the outside ambient air, can be used to cool the working fluid without the need for the low efficiency compressor.
  • Accordingly, it has been determined by the present disclosure that there is a need for methods and systems that improve the efficiency of integrated air conditioning systems.
  • BRIEF SUMMARY OF THE INVENTION
  • An integrated air conditioning system having a first air conditioning unit having a first evaporator with a first input and a first output; a second air conditioning unit having a second evaporator with a second input and a second output; a first conduit fluidly connecting the first input with the second output; a second conduit fluidly connecting the second input with the first output, wherein the first and second conduits and the first and second evaporators form a working fluid circuit.
  • An integrated air conditioning system, having a first air conditioning unit having a first evaporator with a first inlet and a first outlet, a first pump, and a first refrigeration circuit, the first air conditioning unit having a first cooling mode and first free-cooling mode; a second air conditioning unit having a second evaporator with a second inlet and a second outlet, a second pump, and a second refrigeration circuit, the second air conditioning unit having a second cooling mode and a second free-cooling mode; a first conduit fluidly connecting the first input with the second output; a second conduit fluidly connecting the second input with the first output, wherein the first and second conduits and first and second evaporators form a working fluid circuit through which a working fluid flows.
  • A method for controlling an integrated air conditioning system having a first air conditioning unit and a second air conditioning unit, in which the first air conditioning unit and the second air conditioning unit are in heat exchange communication with a working fluid. The method includes switching the first air conditioning unit from a cooling mode to a free-cooling mode; and operating the second air conditioning unit for a predetermined period of time after switching the first air conditioning unit into the free-cooling mode.
  • The above-described and other features and advantages of the present disclosure will be appreciated and understood by those skilled in the art from the following detailed description, drawings, and appended claims.
  • BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
  • FIG. 1 is an exemplary embodiment of an air conditioning unit in cooling mode according to the present disclosure;
  • FIG. 2 is an exemplary embodiment of an air conditioning unit in free-cooling mode according to the present disclosure; and
  • FIG. 3 illustrates an exemplary embodiment of an air conditioning system comprised of the air conditioning units of FIGS. 1 and 2 according to the present disclosure.
  • DETAILED DESCRIPTION OF THE INVENTION
  • Referring now to the drawings and in particular to FIGS. 1 and 2, an exemplary embodiment of an air conditioning unit (“unit”) according to the present disclosure, generally referred to by reference numeral 10, is shown. As seen in FIG. 3, two air conditioning units 10-1 and 10-2 can be integrated to form an air conditioning system 42. Advantageously, air conditioning system 42 provides for working fluid 22 to pass from unit 10-1 to unit 10-2 during a switch from cooling mode to free-cooling mode, or vice versa. Thus, there is no stoppage in the conditioning of the working fluid.
  • Unit 10 includes a controller 30 for selectively switching between cooling and free-cooling modes 32, 34. Unit 10 also includes a refrigeration circuit 36 that includes a condenser 14, a pump 16, an expansion device 18, an evaporator 20, an evaporator input 34, an evaporator output 48, and a compressor 12. Controller 30 selectively controls either compressor 12 (when in cooling mode 32) or pump 16 (when in free-cooling mode 34) to circulate a refrigerant through system 10 in a flow direction 28. Thus, unit 10, when in cooling mode 32, controls compressor 12 to compress and circulate the refrigerant in flow direction 28. However, unit 10, when in free-cooling mode 34, controls pump 16 to circulate the refrigerant in flow direction 28. As such, free-cooling mode 34 uses less energy than cooling mode 32 since the free-cooling mode does not require the energy expended by compressor 12.
  • Unit 10 includes a compressor by-pass loop 46 and a pump by-pass loop 34. Unit 10 includes one or more valves 24, 26, and 38. Valves 24, 26, and 38 are controlled by controller 30 in a known manner. Thus, controller 30 can selectively position valves 24, 26, and 38 to selectively open and close by-pass loops 44, 46 as desired.
  • In cooling mode 32, controller 30 controls valves 24, 26, and 38 so that compressor by-pass loop 44 is closed and pump by-pass loop 46 is open. In this manner, unit 10 allows compressor 12 to compress and circulate refrigerant in flow direction 28 by flowing through pump by-pass loop 46.
  • In contrast, controller 30, when in free-cooling mode 34, controls valves 24, 26, and 38 so that compressor by-pass loop 44 is open and pump by-pass loop 46 is closed. In this manner, unit 10 allows pump 16 to circulate refrigerant in flow direction 28 by flowing through compressor by-pass loop 44.
  • Evaporator 20 includes evaporator input 34 (through which working fluid 22 enters the evaporator) and evaporator output 48 through which working fluid 22 exits the evaporator. Within evaporator 20, working fluid 22 is in heat-exchange communication with the refrigerant in both cooling and free-cooling modes 32, 34. Working fluid 22 can be ambient indoor air or a secondary loop fluid such as, but not limited to, chilled water or glycol.
  • In cooling mode 32, unit 10 operates as a standard vapor-compression air conditioning system known in the art in which the compression and expansion of refrigerant via expansion device 18 are used to condition working fluid 22. Expansion device 18 can be any known controllable expansion device such as, but not limited to, a thermal expansion valve.
  • In free-cooling mode 34, unit 10 takes advantage of the heat removing capacity of outdoor ambient air, which is in heat exchange relationship with condenser 14 via one or more fans to condition working fluid 22.
  • Although unit 10 is described herein as a conventional air conditioning (cooling) unit, one skilled in the art will recognize that unit 10 may also be a heat pump system to provide both heating and cooling by adding a reversing valve (not shown) so that condenser 14 (i.e., the outdoor heat exchanger) functions as an evaporator in the heating mode and evaporator 20 (i.e., the indoor heat exchanger) functions as a condenser in the heating mode.
  • Unfortunately, it has been determined by the present disclosure that when controller 30 initiates a switchover from cooling mode 32 to free-cooling mode 34, or vice versa, refrigeration circuit 36 is temporarily stopped. When refrigeration circuit 36 is stopped, the heat-exchange between the refrigerant and working fluid 22 is diminished resulting in a warming of the working fluid. This is counterproductive in that when unit 10 is re-activated, working fluid 22 will have to be conditioned once again.
  • The present disclosure contemplates an air conditioning system 42, wherein air conditioning units 10-1, 10-2 are integrated systematically and configured such that working fluid 22 circulates through each of the systems. Advantageously, when one of units 10-1 or 10-2 is temporarily stopped during a switchover between cooling and free-cooling modes, or vice versa, the other unit is running and conditioning working fluid 22, thus preventing an undue warming of working fluid 22.
  • Referring now to FIG. 3, an exemplary embodiment of system 42 according to the present disclosure is shown. System 42 includes a controller 40. In one embodiment of the present disclosure, controller 40 is in electrical communication with each one of controllers 30 of air conditioning units 10-1 and 10-2 and coordinates the operation of the units when either of the units is temporarily stopped during a switchover from cooling mode 32 to free-cooling mode 34, or vice versa.
  • System 42 contains first conduit 50 and second conduit 52. In the embodiment of system 42 shown in FIG. 3, first conduit 50 fluidly connects evaporator output 48 of unit 10-2 to evaporator input 34 of unit 10-1, thereby allowing working fluid to flow freely between the evaporators. Second conduit 52 fluidly connects evaporator output 48 of unit 10-1 to evaporator input 34 of unit 10-2. In one embodiment of the present disclosure, first and second conduits 50, 52 are pipes. Advantageously, the addition of first and second conduits 50, 52 form working fluid circuit 54 through which working fluid 22 flows freely between units 10-1 and 10-2. Advantageously, when either unit 10-1 or 10-2 is temporarily halted during a switchover between modes, working fluid 22 continues to be conditioned by the other system which is still operating.
  • It should be recognized that although system 10-1 is shown in cooling mode 32 and system 10-2 is shown in free-cooling mode 34, systems 10-1 and 10-2 can be operating in any mode. Furthermore, either system 10-1 or 10-2 can be in the switchover between modes, while the other system is running.
  • It should also be recognized that even though system 42 is shown having two units 10-1 and 10-2, it is contemplated by the present disclosure that system 42 can have more than two systems.
  • In operation, at least one of units 10-1 and 10-2 is operating in cooling mode 32. For purposes of example only, unit 10-1 is operating in cooling mode 32. When controller 30 of unit 10-1 determines that sufficient conditions are present to run unit 10-1 in free-cooling mode 34, controller 30 communicates with controller 40. If unit 10-2 is currently running, unit 10-2 will continue running. However, if unit 10-2 is not running, controller 40 sends a signal to controller 30 to turn on unit 10-2 in cooling mode. After unit 10-2 is turned on and running, unit 10-1 initiates a switchover from cooling mode 32 to free-cooling mode 34. Advantageously, working fluid 22 continues to be conditioned by unit 10-2 when unit 10-1 is transitioning from cooling mode 32 to free-cooling mode 34.
  • Although the above example refers to a switchover between cooling mode 32 to free-cooling mode 34, it should be recognized that unit 10-2 may be running in cooling mode 32 and be transitioning to free-cooling mode 34.
  • It should also be noted that the terms “first”, “second”, “third”, “upper”, “lower”, and the like may be used herein to modify various elements. These modifiers do not imply a spatial, sequential, or hierarchical order to the modified elements unless specifically stated.
  • While the present disclosure has been described with reference to one or more exemplary embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the present disclosure. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the disclosure without departing from the scope thereof. Therefore, it is intended that the present disclosure not be limited to the particular embodiment(s) disclosed as the best mode contemplated, but that the disclosure will include all embodiments falling within the scope of the appended claims.

Claims (7)

What is claimed is:
10. An integrated air conditioning system, comprising:
a first air conditioning unit having a first evaporator with a first inlet and a first outlet, a first pump, and a first refrigeration circuit, said first air conditioning unit having a first cooling mode and first free-cooling mode;
a second air conditioning unit having a second evaporator with a second inlet and a second outlet, a second pump, and a second refrigeration circuit, said second air conditioning unit having a second cooling mode and a second free-cooling mode;
a first conduit fluidly connecting said first input with said second output; and
a second conduit fluidly connecting said second input with said first output, wherein said first and second conduits and first and second evaporators form a working fluid circuit through which a working fluid flows without flowing through a heat exchanger conduit.
11. The integrated air conditioning system of claim 10, wherein said working fluid is chilled water or glycol.
12. The integrated air conditioning system of claim 10, wherein said working fluid circuit keeps said working fluid flowing through said first and second air conditioning units during a temporary stoppage of either said first or second air conditioning units so as to minimize an increase in temperature of said working fluid during said temporary stoppage.
13. The integrated air conditioning system of claim 10, further comprising a controller in electrical communication with said first and second air conditioning units.
14. A method for controlling an integrated air conditioning system having a first air conditioning unit and a second air conditioning unit, wherein the first air conditioning unit and the second air conditioning unit are in heat exchange communication with a working fluid, comprising:
switching the first air conditioning unit from a cooling mode to a free-cooling mode; and
operating the second air conditioning unit for a predetermined period of time after switching the first air conditioning unit into the free-cooling mode.
15. The method of claim 14, wherein said operating the second air conditioning unit comprises turning on the second air conditioning unit.
16. The method of claim 14, wherein said operating the second air conditioning unit comprises maintaining the operation of the second air conditioning unit if the second air conditioning unit was previously in operation.
US15/888,504 2007-09-18 2018-02-05 Methods and systems for controlling integrated air conditioning systems Pending US20180156505A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/US2007/020170 WO2009038552A1 (en) 2007-09-18 2007-09-18 Methods and systems for controlling integrated air conditioning systems
US12/674,135 US9909790B2 (en) 2007-09-18 2007-09-18 Methods and systems for controlling integrated air conditioning systems
US15/888,504 US20180156505A1 (en) 2007-09-18 2018-02-05 Methods and systems for controlling integrated air conditioning systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US15/888,504 US20180156505A1 (en) 2007-09-18 2018-02-05 Methods and systems for controlling integrated air conditioning systems

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
PCT/US2007/020170 Division WO2009038552A1 (en) 2007-09-18 2007-09-18 Methods and systems for controlling integrated air conditioning systems
US12/674,135 Division US9909790B2 (en) 2007-09-18 2007-09-18 Methods and systems for controlling integrated air conditioning systems

Publications (1)

Publication Number Publication Date
US20180156505A1 true US20180156505A1 (en) 2018-06-07

Family

ID=40468172

Family Applications (2)

Application Number Title Priority Date Filing Date
US12/674,135 Active 2034-06-22 US9909790B2 (en) 2007-09-18 2007-09-18 Methods and systems for controlling integrated air conditioning systems
US15/888,504 Pending US20180156505A1 (en) 2007-09-18 2018-02-05 Methods and systems for controlling integrated air conditioning systems

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US12/674,135 Active 2034-06-22 US9909790B2 (en) 2007-09-18 2007-09-18 Methods and systems for controlling integrated air conditioning systems

Country Status (6)

Country Link
US (2) US9909790B2 (en)
EP (1) EP2188576B1 (en)
CN (1) CN101802512B (en)
ES (1) ES2784024T3 (en)
HK (1) HK1147308A1 (en)
WO (1) WO2009038552A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101802512B (en) 2007-09-18 2012-11-07 开利公司 Methods and systems for controlling integrated air conditioning systems
GB0900268D0 (en) * 2009-01-08 2009-02-11 Mewburn Ellis Llp Cooling apparatus and method
FR2972047A1 (en) * 2011-02-25 2012-08-31 Julien Guillaume Leprieur DEVICE FOR IMPROVING THE PERFORMANCE OF REFRIGERATING FACILITIES
WO2015131235A1 (en) * 2014-03-06 2015-09-11 Aircommand Australia Pty Ltd Improved air conditioning system
KR20170067559A (en) * 2015-12-08 2017-06-16 엘지전자 주식회사 A refrigerator and a method for controlling the same
JP6715655B2 (en) * 2016-04-06 2020-07-01 日立ジョンソンコントロールズ空調株式会社 Cooling system
US10782034B2 (en) * 2017-12-13 2020-09-22 RK Mechanical, Inc. System for conditioning an airflow using a portable closed loop cooling system
DE102018002120A1 (en) * 2018-03-13 2019-09-19 Matthias Leipoldt Device for tempering filter-cleaned liquid medium
EP3627072A1 (en) 2018-09-18 2020-03-25 Daikin applied Europe S.p.A. Cooling system
EP3627073A1 (en) 2018-09-18 2020-03-25 Daikin applied Europe S.p.A. Flooded evaporator

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2048711A (en) * 1933-11-22 1936-07-28 Westinghouse Electric & Mfg Co Control system for air conditioning apparatus
US6023935A (en) * 1998-02-23 2000-02-15 Mitsubishi Denki Kabushiki Kaisha Air conditioner
US6094925A (en) * 1999-01-29 2000-08-01 Delaware Capital Formation, Inc. Crossover warm liquid defrost refrigeration system
US20070130971A1 (en) * 2005-11-24 2007-06-14 Danfoss A/S Method of analysing a refrigeration system and a method of controlling a refrigeration system
US20100023166A1 (en) * 2006-12-21 2010-01-28 Carrier Corporation Free-cooling limitation control for air conditioning systems
US20100036530A1 (en) * 2006-12-22 2010-02-11 Carrier Corporation Air conditioning systems and methods having free-cooling pump starting sequences
US20100070082A1 (en) * 2006-12-27 2010-03-18 Carrier Corporation Methods and systems for controlling an air conditioning system operating in free cooling mode

Family Cites Families (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1887909A (en) * 1929-06-08 1932-11-15 Siemens Ag Absorption machine
US4372129A (en) * 1981-05-19 1983-02-08 Moore & Hanks Co. Fail-safe refrigeration for continuous process
CN1007086B (en) 1987-11-16 1990-03-07 株式会社竹中工务店 Air-conditioning equipment
US7231967B2 (en) * 1994-01-31 2007-06-19 Building Performance Equipment, Inc. Ventilator system and method
FR2716959B1 (en) * 1994-03-04 1996-05-15 Thermique Generale Vinicole Distribution and / or collection of cold and / or hot.
US6038879A (en) * 1995-08-08 2000-03-21 Yvon Turcotte Combined air exchange and air conditioning unit
US5718122A (en) * 1996-01-12 1998-02-17 Ebara Corporation Air conditioning system
JPH09273876A (en) 1996-04-08 1997-10-21 Mitsubishi Denki Bill Techno Service Kk Cooler with natural circulation loop
US5715693A (en) * 1996-07-19 1998-02-10 Sunpower, Inc. Refrigeration circuit having series evaporators and modulatable compressor
JPH10300265A (en) 1997-05-01 1998-11-13 Daikin Ind Ltd Refrigerating equipment
DE10029660A1 (en) * 2000-06-23 2002-01-03 Uwe Zeiler Arrangement for emergency cooling in air conditioning systems, especially for machine rooms, uses plate heat exchangers provided for free cooling mode for emergency cooling
JP3438000B2 (en) 2000-08-04 2003-08-18 株式会社日立製作所 Air conditioner
US6644049B2 (en) * 2002-04-16 2003-11-11 Lennox Manufacturing Inc. Space conditioning system having multi-stage cooling and dehumidification capability
US6860116B2 (en) * 2002-09-18 2005-03-01 Carrier Corporation Performance enhancement of vapor compression systems with multiple circuits
US6644038B1 (en) * 2002-11-22 2003-11-11 Praxair Technology, Inc. Multistage pulse tube refrigeration system for high temperature super conductivity
KR100487381B1 (en) * 2002-12-26 2005-05-03 엘지전자 주식회사 air conditioning system ventilating room
US20060010893A1 (en) * 2004-07-13 2006-01-19 Daniel Dominguez Chiller system with low capacity controller and method of operating same
US7434413B2 (en) * 2005-01-10 2008-10-14 Honeywell International Inc. Indoor air quality and economizer control methods and controllers
KR100585991B1 (en) 2005-02-23 2006-06-02 주식회사 창조이십일 Air conditioner and method for controlling thereof
JP2007071519A (en) * 2005-09-09 2007-03-22 Sanden Corp Cooling system
DE102006040191A1 (en) * 2006-08-28 2008-03-13 Airbus Deutschland Gmbh Cooling system for cooling heat loads on board in aircraft, has coupling system to selectively couple two cold carrier fluid circuits coupled to cold producing device and connected to corresponding heat load
CN101680699B (en) * 2006-12-28 2012-07-18 开利公司 Free-cooling capacity control for air conditioning systems
CN101802512B (en) 2007-09-18 2012-11-07 开利公司 Methods and systems for controlling integrated air conditioning systems
US9291373B2 (en) * 2008-11-06 2016-03-22 Trane International Inc. Fixed and variable refrigerant metering system
WO2012066763A1 (en) * 2010-11-15 2012-05-24 三菱電機株式会社 Freezer

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2048711A (en) * 1933-11-22 1936-07-28 Westinghouse Electric & Mfg Co Control system for air conditioning apparatus
US6023935A (en) * 1998-02-23 2000-02-15 Mitsubishi Denki Kabushiki Kaisha Air conditioner
US6094925A (en) * 1999-01-29 2000-08-01 Delaware Capital Formation, Inc. Crossover warm liquid defrost refrigeration system
US20070130971A1 (en) * 2005-11-24 2007-06-14 Danfoss A/S Method of analysing a refrigeration system and a method of controlling a refrigeration system
US20100023166A1 (en) * 2006-12-21 2010-01-28 Carrier Corporation Free-cooling limitation control for air conditioning systems
US20100036530A1 (en) * 2006-12-22 2010-02-11 Carrier Corporation Air conditioning systems and methods having free-cooling pump starting sequences
US20100070082A1 (en) * 2006-12-27 2010-03-18 Carrier Corporation Methods and systems for controlling an air conditioning system operating in free cooling mode

Also Published As

Publication number Publication date
EP2188576A4 (en) 2013-12-18
CN101802512A (en) 2010-08-11
EP2188576A1 (en) 2010-05-26
EP2188576B1 (en) 2020-04-01
US20110094246A1 (en) 2011-04-28
WO2009038552A1 (en) 2009-03-26
CN101802512B (en) 2012-11-07
HK1147308A1 (en) 2011-08-05
US9909790B2 (en) 2018-03-06
ES2784024T3 (en) 2020-09-21

Similar Documents

Publication Publication Date Title
US9068766B2 (en) Air-conditioning and hot water supply combination system
JP5404333B2 (en) Heat source system
EP2102563B1 (en) Air conditioning systems and methods having free-cooling pump-protection sequences
US9506674B2 (en) Air conditioner including a bypass pipeline for a defrosting operation
EP2122273B1 (en) Air conditioning systems and methods having free-cooling pump starting sequences
US20180120005A1 (en) Free cooling refrigeration system
US6871509B2 (en) Enhanced cooling system
EP2464924B1 (en) Free cooling refrigeration system
US9683768B2 (en) Air-conditioning apparatus
EP2102569B1 (en) Methods and systems for controlling an air conditioning system operating in free cooling mode
JP4273493B2 (en) Refrigeration air conditioner
CN101611277B (en) Free-cooling limitation control for air conditioning systems
US9322562B2 (en) Air-conditioning apparatus
US9671119B2 (en) Air-conditioning apparatus
US8713951B2 (en) Air conditioning apparatus
US8261561B2 (en) Free-cooling capacity control for air conditioning systems
JP5774121B2 (en) Air conditioner
US20060048539A1 (en) Freezer apparatus
JP5992089B2 (en) Air conditioner
JP2006258343A (en) Air conditioning system
CN101611275B (en) Methods and systems for controlling air conditioning systems having a cooling mode and a free-cooling mode
JP2005077084A (en) Air-conditioner, and control method therefor
JP2007232232A (en) Cooling/heating device
US9494348B2 (en) Air-conditioning apparatus
US9593872B2 (en) Heat pump

Legal Events

Date Code Title Description
AS Assignment

Owner name: CARRIER CORPORATION, CONNECTICUT

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:PHAM, BATUNG;DELPECH, PIERRE;RIGAL, PHILIPPE;REEL/FRAME:044839/0141

Effective date: 20070705

STPP Information on status: patent application and granting procedure in general

Free format text: DOCKETED NEW CASE - READY FOR EXAMINATION

STPP Information on status: patent application and granting procedure in general

Free format text: NON FINAL ACTION MAILED

STPP Information on status: patent application and granting procedure in general

Free format text: RESPONSE TO NON-FINAL OFFICE ACTION ENTERED AND FORWARDED TO EXAMINER

STPP Information on status: patent application and granting procedure in general

Free format text: NON FINAL ACTION MAILED

STPP Information on status: patent application and granting procedure in general

Free format text: RESPONSE TO NON-FINAL OFFICE ACTION ENTERED AND FORWARDED TO EXAMINER

STCB Information on status: application discontinuation

Free format text: FINAL REJECTION MAILED

STPP Information on status: patent application and granting procedure in general

Free format text: ADVISORY ACTION MAILED

STPP Information on status: patent application and granting procedure in general

Free format text: NON FINAL ACTION MAILED

STPP Information on status: patent application and granting procedure in general

Free format text: RESPONSE TO NON-FINAL OFFICE ACTION ENTERED AND FORWARDED TO EXAMINER