US20070012070A1 - Air-conditioning loop with gas accumulator - Google Patents

Air-conditioning loop with gas accumulator Download PDF

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Publication number
US20070012070A1
US20070012070A1 US11/485,913 US48591306A US2007012070A1 US 20070012070 A1 US20070012070 A1 US 20070012070A1 US 48591306 A US48591306 A US 48591306A US 2007012070 A1 US2007012070 A1 US 2007012070A1
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US
United States
Prior art keywords
heat exchanger
air
internal heat
pressure side
accumulator
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.)
Abandoned
Application number
US11/485,913
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English (en)
Inventor
Frank Vetter
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.)
Modine Manufacturing Co
Original Assignee
Modine Manufacturing Co
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 Modine Manufacturing Co filed Critical Modine Manufacturing Co
Publication of US20070012070A1 publication Critical patent/US20070012070A1/en
Assigned to MODINE MANUFACTURING COMPANY reassignment MODINE MANUFACTURING COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: VETTER, FRANK
Abandoned legal-status Critical Current

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Classifications

    • 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
    • F25B40/00—Subcoolers, desuperheaters or superheaters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00507—Details, e.g. mounting arrangements, desaeration devices
    • B60H1/00585—Means for monitoring, testing or servicing the air-conditioning
    • 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
    • F25B45/00—Arrangements for charging or discharging refrigerant
    • 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
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
    • F25B9/008—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide
    • 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
    • F25B2309/00—Gas cycle refrigeration machines
    • F25B2309/06—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide
    • F25B2309/061—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide with cycle highest pressure above the supercritical pressure
    • 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
    • F25B2400/05—Compression system with heat exchange between particular parts of the system
    • F25B2400/053—Compression system with heat exchange between particular parts of the system between the storage receiver and another part of the system
    • 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
    • F25B2400/16—Receivers

Definitions

  • the present invention relates to an air-conditioning loop, and particularly to a vehicle air-conditioning loop with a transcritical refrigerant.
  • Air-conditioning loops are, of course, well known. Further, such air-conditioning loops with a transcritical refrigerant are also known, especially for use in a vehicle. Broadly, such loops include a compressor, a gas cooler, an evaporator, an expansion device, an accumulator and an internal heat exchanger, which serve to exchange heat between a high pressure side a low pressure side.
  • German Patent Application (file number DE 10 2005 021 464.9) also describes an internal heat exchanger.
  • the accumulator ensures that the refrigerant fed to the low-pressure part of the internal heat exchanger is either gaseous or a two-phase mixture with high vapor fraction in order to ensure high efficiency of the air conditioner.
  • the remaining liquid refrigerant is deposited in the accumulator and forms a buffer in order to cover the different refrigerant demands of the loop under different operating conditions and especially to compensate for the loss of refrigerant from leaks over a longer operating time of the air conditioner.
  • accumulator vessel For air conditioners that operate without thermally-regulated expansion devices, such liquid separation on the low-pressure side may be sufficient. However, especially for transcritical coolant loops, a much larger accumulator vessel must be provided to accommodate the refrigerant (CO 2 ) at high ambient temperatures than is necessary for liquid storage. The accumulator vessel therefore functions as a supercritical gas accumulator in the switched-off state and a liquid accumulator or separator when the unit is in operation.
  • receivers i.e., liquid accumulators that are integrated by design into the condenser with a supercooling zone
  • the present invention is directed toward overcoming one or more of the problems set forth above.
  • an air-conditioning loop with a transcritical refrigerant including a compressor, a gas cooler, an evaporator, an expansion device, an internal heat exchanger for heat exchange between a high-pressure side and a low-pressure side, and an accumulator on the low-pressure side between evaporator and the internal heat exchanger, wherein a gas accumulator is provided on the low-pressure side.
  • the gas accumulator is connected by a branch line to the line between the internal heat exchanger and compressor.
  • the gas accumulator is a line thickening between the internal heat exchanger and the compressor.
  • the gas accumulator is integrated with the gas cooler.
  • the gas accumulator is situated between the internal heat exchanger and the intake side of the compressor.
  • the gas accumulator is connected by a branch line to the line between the internal heat exchanger and compressor.
  • the gas accumulator is integrated in the internal heat exchanger.
  • the internal heat exchanger includes a first tube with a multi-chamber tube extending therethrough with the high-pressure side flowing through the multi-chamber tube, and the first tube includes a low-pressure flow path occupying part of the tube cross-section adjacent the multi-chamber tube with the remaining cross-section of the first tube being a gas accumulator connected to the low-pressure side.
  • FIG. 1 schematically illustrates a first cooling loop having a gas accumulator incorporated therein in one position on the low pressure side;
  • FIG. 2 schematically illustrates a second cooling loop having a gas accumulator incorporated therein in a second position on the low pressure side;
  • FIG. 3 schematically illustrates a third cooling loop having a gas accumulator incorporated therein in a third position on the low pressure side;
  • FIG. 4 schematically illustrates a fourth cooling loop having a gas accumulator incorporated therein in a fourth position on the low pressure side
  • FIG. 5 shows a cross-section through a gas accumulator which is active as an internal heat exchanger.
  • FIGS. 1 to 4 illustrate various arrangements of the air-conditioning loops such as may be especially used in a vehicle, with a transcritical refrigerant.
  • the loops each include a compressor 10 , a gas cooler 12 , an evaporator 14 , an expansion device and internal heat exchanger 20 (for heat exchange between a high-pressure side HD and a low-pressure side ND), and an accumulator 26 (on the low-pressure side between the evaporator 14 and the internal heat exchanger 20 ).
  • Air-conditioning loops such as illustrated in these Figures generally correspond to prior art air conditioning loops.
  • the holding capacity of the accumulator 26 is different than those used in the prior art.
  • the holding capacity and the space requirements for the accumulator connected with it is about 500-800 mL.
  • the holding capacity of the accumulator 26 variously depicted in FIGS. 1 to 4 is reduced to about 200-400 mL, leading to a significant space savings, particularly in vehicles, where space available for the various automotive systems is extremely limited (and interdependent, since increasing the size of one component will frequently require that the size of another component be decreased, or that some other component be moved in an already crowded space).
  • the gas accumulator 30 is mounted by means of a branch line 40 on the line between the internal heat exchanger 20 and the intake side of the compressor 10 .
  • the holding capacity of the accumulator 26 is about 200-350 mL, which is sufficient in order to be able to compensate for the loss of refrigerant over the required period.
  • the space savings obtained is primarily attributed to the fact that the two relatively small vessels can be arranged individually in available niches.
  • a branch line 40 is also provided in order to incorporate the gas accumulator 30 on the low-pressure side ND.
  • the gas accumulator 30 in FIG. 2 is combined with the gas cooler 12 .
  • the gas accumulator 30 may be a narrow tube parallel to one of the collecting tanks of the gas cooler 12 (not shown).
  • the gas accumulator 30 is traversed by the entire gaseous refrigerant. It can, for example, be designed as a partial line thickening.
  • the gas accumulator 30 is combined with the internal heat exchanger 20 .
  • FIG. 5 illustrates a cross-section through an internal heat-exchanger 20 having the gas accumulator 30 according to a particularly advantageous embodiment of the present invention.
  • This embodiment includes a long, narrow, round (and therefore pressure-stable) tube 42 .
  • the high-pressure side HD flows through a flat multi-chamber tube 44 arranged centrally in the tube 42 .
  • the low pressure side ND flows through a flow path 46 divided on both sides of the flat multi-chamber tube 44 , which is filled with an internal insert 48 .
  • Two thin longitudinal partitions 56 with beveled longitudinal edges 58 are suitably joined by soldering to the inside wall of the tube 42 , and separate the low-pressure flow path 46 .
  • the remaining cross-section of the tube 42 As is apparent from FIG. 5 , the remaining cross-section of the tube 42 , roughly half the entire tube cross-section, remains available for use as the gas accumulator 30 , with corresponding openings (not shown) being present in the longitudinal partitions 56 in order to produce a connection between the low-pressure flow path and the low-pressure gas accumulator 30 .
  • the gas accumulator 30 integrated in the internal heat exchanger 20 also has a connection (not shown) to the intake side of compressor 10 .
  • This device designed as an advantageous solder design, is characterized by particular ease of manufacture and is highly effective as an internal heat exchanger 20 .
  • the present invention in at least one aspect may provide an air-conditioning loop with a transcritical refrigerant which may be accommodated in the same design space as an air conditioner with ordinary refrigerant.
  • a gas accumulator may be provided which has an external shape favorable for positioning in the design space and can also be integrated at any location in the vehicle, for example on the gas cooler.
US11/485,913 2005-07-15 2006-07-13 Air-conditioning loop with gas accumulator Abandoned US20070012070A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005033019A DE102005033019A1 (de) 2005-07-15 2005-07-15 Anordnung in einem Klimatisierungskreislauf
DE102005033019.3 2005-07-15

Publications (1)

Publication Number Publication Date
US20070012070A1 true US20070012070A1 (en) 2007-01-18

Family

ID=37074755

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/485,913 Abandoned US20070012070A1 (en) 2005-07-15 2006-07-13 Air-conditioning loop with gas accumulator

Country Status (3)

Country Link
US (1) US20070012070A1 (de)
EP (1) EP1744108B1 (de)
DE (2) DE102005033019A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9145040B2 (en) 2012-02-23 2015-09-29 Ford Global Technologies, Llc Heat exchanger for an air conditioning system
US20160332508A1 (en) * 2014-01-22 2016-11-17 Hanon Systems Air conditioner system for vehicle
US20170246934A1 (en) * 2014-07-29 2017-08-31 Hanon Systems Air conditioner system for vehicle

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006007371A1 (de) * 2006-02-17 2007-08-23 Bayerische Motoren Werke Ag Fahrzeugklimaanlage
DE102022118622A1 (de) 2022-07-26 2024-02-01 Audi Aktiengesellschaft Kälteanlage für überkritisches Kältemittel mit zusätzlichem Kältemittelspeicher und eingebundenem Wärmeübertrager für ein Kraftfahrzeug, Kraftfahrzeug mit einer solchen Kälteanlage
DE102022118621A1 (de) 2022-07-26 2024-02-01 Audi Aktiengesellschaft Kälteanlage für überkritisches Kältemittel mit zusätzlichem Kältemittelspeicher für ein Kraftfahrzeug, Kraftfahrzeug mit einer solchen Kälteanlage

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5245836A (en) * 1989-01-09 1993-09-21 Sinvent As Method and device for high side pressure regulation in transcritical vapor compression cycle
US20020083733A1 (en) * 2000-12-29 2002-07-04 Zhang Chao A. Accumulator with internal heat exchanger
US20030217567A1 (en) * 2002-05-24 2003-11-27 Kwangheon Oh Multistage gas and liquid phase separation condenser
US20040261449A1 (en) * 2003-06-24 2004-12-30 Memory Stephen B. Refrigeration system
US6901783B2 (en) * 2001-02-09 2005-06-07 Tapco International Corporation Device having pivotable wheel mechanism

Family Cites Families (11)

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NO175830C (no) * 1992-12-11 1994-12-14 Sinvent As Kompresjonskjölesystem
JPH10238872A (ja) 1997-02-24 1998-09-08 Zexel Corp 炭酸ガス冷凍サイクル
JP2000346472A (ja) * 1999-06-08 2000-12-15 Mitsubishi Heavy Ind Ltd 超臨界蒸気圧縮サイクル
US6405793B1 (en) * 2000-05-03 2002-06-18 Delphi Technologies, Inc. Secondary loop system for passenger compartment heating and cooling
JP2002195705A (ja) 2000-12-28 2002-07-10 Tgk Co Ltd 超臨界冷凍サイクル
JP2004028525A (ja) 2002-06-28 2004-01-29 Zexel Valeo Climate Control Corp アキュムレータ及びこれを用いた冷凍サイクル
FR2847664B1 (fr) 2002-11-25 2005-12-02 Dispositif compensant les fuites d'un circuit de climatisation automobile ou de refrigeration de vehicule frigorifique utilisant du dioxyde de carbone comme fluide frogorigene
DE10317551B3 (de) 2003-04-15 2004-04-22 Siemens Ag Kraftfahrzeugklimaanlage mit CO2-Kältemittel
DE10332505B3 (de) * 2003-07-17 2005-01-13 Daimlerchrysler Ag Klimaanlage
US6923011B2 (en) * 2003-09-02 2005-08-02 Tecumseh Products Company Multi-stage vapor compression system with intermediate pressure vessel
DE10344590A1 (de) * 2003-09-25 2005-04-28 Bosch Gmbh Robert Klimaanlage und Verfahren zum Betreiben einer Klimaanlage

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5245836A (en) * 1989-01-09 1993-09-21 Sinvent As Method and device for high side pressure regulation in transcritical vapor compression cycle
US20020083733A1 (en) * 2000-12-29 2002-07-04 Zhang Chao A. Accumulator with internal heat exchanger
US6901783B2 (en) * 2001-02-09 2005-06-07 Tapco International Corporation Device having pivotable wheel mechanism
US20030217567A1 (en) * 2002-05-24 2003-11-27 Kwangheon Oh Multistage gas and liquid phase separation condenser
US20040261449A1 (en) * 2003-06-24 2004-12-30 Memory Stephen B. Refrigeration system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9145040B2 (en) 2012-02-23 2015-09-29 Ford Global Technologies, Llc Heat exchanger for an air conditioning system
US20160332508A1 (en) * 2014-01-22 2016-11-17 Hanon Systems Air conditioner system for vehicle
US10059173B2 (en) * 2014-01-22 2018-08-28 Hanon Systems Air conditioner system for vehicle
US20170246934A1 (en) * 2014-07-29 2017-08-31 Hanon Systems Air conditioner system for vehicle
US10766340B2 (en) * 2014-07-29 2020-09-08 Hanon Systems Air conditioner system for vehicle

Also Published As

Publication number Publication date
DE102005033019A1 (de) 2007-01-25
DE502006008750D1 (de) 2011-03-03
EP1744108B1 (de) 2011-01-19
EP1744108A3 (de) 2008-10-08
EP1744108A2 (de) 2007-01-17

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Legal Events

Date Code Title Description
AS Assignment

Owner name: MODINE MANUFACTURING COMPANY, WISCONSIN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:VETTER, FRANK;REEL/FRAME:020116/0078

Effective date: 20060717

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION