US20180017295A1 - Transcritical air conditioning circuit with integrated expansion vessel - Google Patents

Transcritical air conditioning circuit with integrated expansion vessel Download PDF

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Publication number
US20180017295A1
US20180017295A1 US15/553,444 US201615553444A US2018017295A1 US 20180017295 A1 US20180017295 A1 US 20180017295A1 US 201615553444 A US201615553444 A US 201615553444A US 2018017295 A1 US2018017295 A1 US 2018017295A1
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US
United States
Prior art keywords
exchanger
coolant
volume
air conditioning
refrigerant
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
US15/553,444
Other languages
English (en)
Inventor
Georges De Pelsemaeker
Sébastien JACOPE
Jérôme Mougnier
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.)
Valeo Systemes Thermiques SAS
Original Assignee
Valeo Systemes Thermiques SAS
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 Valeo Systemes Thermiques SAS filed Critical Valeo Systemes Thermiques SAS
Publication of US20180017295A1 publication Critical patent/US20180017295A1/en
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
    • F25B25/00—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00
    • F25B25/005—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00 using primary and secondary systems
    • 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
    • F25B39/00—Evaporators; Condensers
    • F25B39/02—Evaporators
    • 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
    • F25B39/00—Evaporators; Condensers
    • F25B39/04—Condensers
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • F28D7/1684—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation the conduits having a non-circular cross-section
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/001—Casings in the form of plate-like arrangements; Frames enclosing a heat exchange core
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0231—Header boxes having an expansion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2255/00—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes
    • F28F2255/14—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes molded
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/12—Fastening; Joining by methods involving deformation of the elements
    • F28F2275/122—Fastening; Joining by methods involving deformation of the elements by crimping, caulking or clinching

Definitions

  • the present invention concerns the field of air conditioning and more particularly air conditioning circuits with transcritical operating cycle.
  • Air conditioning devices for the passenger compartment of a vehicle are in widespread use, whatever the drive train of the vehicle.
  • an air conditioning device operates in accordance with a subcritical operating cycle of vapor compression employing a fluid such as R134a (tetrafluoreethane-1,1,1,2).
  • a thermodynamic cycle is said to be subcritical when it operates below the critical temperature of the fluid.
  • the critical temperature of a fluid is its maximum temperature in the liquid phase, whatever the pressure, i.e. the temperature at its critical point.
  • an air conditioning circuit with transcritical operating cycle comprises a rotary compressor driven, via a clutch, by a rotating element of the engine of the vehicle.
  • this compressor 60 compresses a refrigerant and directs it to a gas cooler 61 beside a fan.
  • the fan forces a flow of air through the gas cooler 61 in order to evacuate maximum calories from the compressed fluid.
  • the refrigerant is then directed toward the cold circuit of an internal exchanger 62 in which the refrigerant gives up more of its heat to a portion of the circuit corresponding to the hot circuit of the internal exchanger 62 .
  • the refrigerant cooled in this way is then directed toward a expansion valve 63 in which the refrigerant is expanded and which directs it toward a “chiller” (or water cooler) type exchanger 64 .
  • the “chiller” type exchanger 64 is connected to a cooling circuit 65 in which circulates a coolant exchanging heat with the refrigerant.
  • the cooling circuit also includes an expansion vessel the function of which is to provide an expansion volume for absorbing variations in the volume of the coolant.
  • An object of the invention is to reduce the overall size and the manufacturing and assembly costs of an air conditioning circuit with transcritical operating cycle.
  • an air conditioning device with transcritical operating cycle comprising a circuit conveying a refrigerant and successively connecting:
  • the second exchanger comprises an expansion volume for the coolant.
  • the invention also comprises a second exchanger for an air conditioning circuit with transcritical operating cycle, comprising a bundle of tubes for circulating a refrigerant that extend in a volume for circulation of a refrigerant fluid.
  • the second exchanger includes an expansion volume for the coolant.
  • the circulation volume of the coolant of an exchanger of the above kind is advantageously of substantially parallelepipedal shape and is delimited by a body comprising a first molded element and a second element clipped to the first.
  • This assembly method is particularly economical and reliable.
  • the first element has a substantially parallelepipedal shape and the second element is substantially plane.
  • first element and the second element are of substantially parallelepipedal shape.
  • At least one of the elements comprises at least one groove receiving the flanks of a manifold of the bundle of tubes for circulation of the refrigerant.
  • FIG. 1 is a diagrammatic representation of a prior art air conditioning circuit with transcritical operating cycle
  • FIG. 2 is a diagrammatic representation of an air conditioning circuit with transcritical operating cycle in accordance with the invention.
  • FIG. 3 is a perspective view of a first embodiment of a second exchanger according to the invention.
  • FIG. 4 is a perspective view of the exchanger from FIG. 3 rotated 90°;
  • FIG. 5 is an exploded perspective view of the exchanger from FIG. 4 ;
  • FIG. 6 is a section of the exchanger from FIG. 4 taken along the line VI-VI;
  • FIG. 7 is a perspective view of a second embodiment of a second exchanger according to the invention.
  • FIG. 8 is a perspective view of the exchanger from FIG. 7 rotated 90°;
  • FIG. 9 is an exploded perspective view of the exchanger from FIG. 8 .
  • the air conditioning device 1 with transcritical operating cycle is mounted in an engine compartment 2 of an internal combustion engine vehicle 3 (not shown).
  • the device 1 comprises a circuit 4 conveying a refrigerant 5 , here CO 2 , in a direction represented by the arrows.
  • the circuit 4 connects successively:
  • the outlet 15 of the hot circuit 14 of the intermediate cooler 10 is, for its part, connected to the inlet 16 of the compressor 7 .
  • a cooling circuit 20 conveys a coolant 21 , here water containing glycol, by means of a circulation pump 22 .
  • the circuit 20 comprises a fluid/air heat exchanger 23 through which a fan 24 forces a flow of air intended for the passenger compartment of the vehicle 3 .
  • the coolant 21 penetrates into the second exchanger 12 in order to lose calories absorbed by the change of state of the refrigerant 5 in the second exchanger 12 .
  • the second exchanger 12 could be used as a “chiller” or water cooler type exchanger. In such use, this type of exchanger functions as an exchanger able to produce cold for exchange with a coolant in another circuit of the motor vehicle, in particular when the latter includes batteries.
  • the second heat exchanger could also be used as a condenser type exchanger or as a gas cooler type exchanger cooled with a coolant (for example water containing glycol).
  • a coolant for example water containing glycol
  • a first embodiment of the second exchanger 12 will now be described with reference to FIGS. 3 to 5 .
  • the second exchanger 12 comprises a body 30 of substantially parallelepipedal shape delimiting an interior volume 31 containing a tube bundle 50 .
  • the body 30 comprises a first molded element 32 of substantially parallelepipedal shape on which is mounted a substantially plane second element 33 .
  • the elements 32 and 33 are fastened to one another by a plurality of clips 34 integral with the second element 33 .
  • the first element 32 includes an open face 35 and is provided with a plurality of exterior ribs 36 increasing its resistance to pressure.
  • the first element 32 comprises a first internal peripheral groove 37 and an identical second groove 38 .
  • the grooves 37 and 38 are respectively at the upper end 39 and at the lower end 40 of the first element 32 .
  • the first element 32 also comprises first and second tubular connectors 41 and 42 respectively leading into an upper portion and a lower portion of the interior volume 31 .
  • the connectors 41 and 42 project on two opposite faces of the first element 32 , one in the vicinity of the upper end 39 and the other in the vicinity of the lower end 40 .
  • a portion 43 of substantially parallelepipedal shape is connected by its base to the upper end 39 of the first element 32 .
  • the portion 43 is in fluid communication with the volume 31 because its base is open.
  • a plug 44 situated on the face opposite the base of the portion 43 enables access to the internal volume 43 . 1 of the portion 43 .
  • the second element 33 comprises a first tubular connector 45 and a second tubular connector 46 leading into the volume 31 and respectively facing the grooves 37 and 38 .
  • the tube bundle 50 comprises seven parallel tubes 51 of rectangular section.
  • the tubes 51 comprise crenellations 51 . 1 that increase the exchange area of the tubes with the medium surrounding them.
  • the tubes 51 extend in the volume 31 from an inlet manifold 52 to an outlet manifold 53 .
  • Each of the manifolds 52 and 53 has a substantially parallelepipedal shape and a respective sealing element 54 and 55 nesting in the tubular part of the connectors 46 and 45 respectively.
  • the second exchanger 12 constructed in this way therefore comprises a tube bundle 50 extending in an interior volume 31 between the two manifolds 52 and 53 .
  • the second exchanger 12 also comprises the internal volume 43 . 1 of the portion 43 in fluid communication with the volume 31 .
  • the second exchanger 12 is connected to the air conditioning device 1 so that the refrigerant 5 at the outlet from the expansion valve 11 enters the inlet manifold 52 via the connector 46 and leaves the outlet manifold 53 via the connector 45 .
  • the inlet of the exchanger 23 is connected to the connector 42 and the outlet of the exchanger 23 is connected to the connector 41 .
  • the expanded refrigerant 5 evaporates in the tubes 51 of the tube bundle 50 and cools the coolant 21 circulated in the interior volume 31 by the circulation pump 22 .
  • the volume 43 . 1 allows the expansion of the coolant 21 .
  • the volume 43 . 1 being situated above the connector 41 of the outlet for the coolant 21 , the latter is little if at all occupied by the coolant 21 and forms an expansion volume for the latter.
  • the body 30 of the second exchanger 12 is of substantially parallelepipedal shape and comprises a molded first element 32 of substantially parallelepipedal shape open on one of its faces.
  • a second element 70 that is also substantially parallelepipedal comprises an open face on which the open face of the element 32 is mounted.
  • the bodies 32 and 70 thus define an interior volume 71 for circulation of the coolant 21 .
  • the elements 32 and 70 are fastened to one another by a plurality of clips 34 .
  • the connection between the two elements 32 and 70 can be effected by means of clips, screws, induction welding or vibration welding.
  • the second element 70 is provided with a plurality of exterior ribs 36 increasing its resistance to pressure and a first internal peripheral groove 72 and a second internal peripheral groove 73 identical to the groove 72 .
  • the grooves 72 and 73 are respectively situated at the upper end 74 and at the lower end 75 of the second element 70 .
  • the second element 70 comprises a first tubular connector 45 and a second tubular connector 46 leading into the volume 71 facing the grooves 72 and 73 respectively.
  • the tube bundle 80 comprises fourteen tubes 51 extending in the volume 71 from the inlet manifold 52 to the outlet manifold 53 .
  • the flanks of the manifolds 53 and 54 of the tube bundle 80 are placed in the grooves 38 and 37 respectively of the first element 32 .
  • the second element 70 is then offered up so that the grooves 73 and 72 face the flanks of the manifolds 53 and 54 .
  • the sealing elements 54 and 55 engage in the tubular parts of the connectors 46 and 45 respectively.
  • the second element 70 is then brought into contact with the first element 32 and the elements are clipped together.
  • the second exchanger 12 constructed in this way therefore comprises a tube bundle 80 offering the exchange area of fourteen tubes 51 .
  • the manufacture of the second exchanger according to this second embodiment employs many elements common to or identical with the first embodiment, resulting in reduced manufacturing and tooling costs.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Air-Conditioning For Vehicles (AREA)
US15/553,444 2015-02-26 2016-02-25 Transcritical air conditioning circuit with integrated expansion vessel Abandoned US20180017295A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR1551660A FR3033194B1 (fr) 2015-02-26 2015-02-26 Circuit de climatisation transcritique a vase d'expansion integre
FR1551660 2015-02-26
PCT/EP2016/053988 WO2016135245A1 (fr) 2015-02-26 2016-02-25 Circuit de climatisation transcritique à vase d'expansion intégré

Publications (1)

Publication Number Publication Date
US20180017295A1 true US20180017295A1 (en) 2018-01-18

Family

ID=53776694

Family Applications (1)

Application Number Title Priority Date Filing Date
US15/553,444 Abandoned US20180017295A1 (en) 2015-02-26 2016-02-25 Transcritical air conditioning circuit with integrated expansion vessel

Country Status (5)

Country Link
US (1) US20180017295A1 (fr)
EP (1) EP3262353A1 (fr)
CN (1) CN107636403B (fr)
FR (1) FR3033194B1 (fr)
WO (1) WO2016135245A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3062714A1 (fr) * 2017-02-06 2018-08-10 Valeo Systemes Thermiques Circuit de gestion thermique et echangeur thermique associe
FR3099820B1 (fr) * 2019-08-05 2022-11-04 Air Liquide Dispositif et installation de réfrigération
CN113188272B (zh) * 2020-08-28 2023-04-18 三花控股集团有限公司 换热组件、换热装置及热管理系统

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2954213A (en) * 1958-02-24 1960-09-27 Marlo Coil Company Heat exchangers
US4450904A (en) * 1978-03-31 1984-05-29 Phillips Petroleum Company Heat exchanger having means for supporting the tubes in spaced mutually parallel relation and suppressing vibration
US20090260386A1 (en) * 2008-04-18 2009-10-22 Klaus Wittmann Heating And Air Conditioning Unit For An Automotive Vehicle
US20120151950A1 (en) * 2010-12-15 2012-06-21 Grundfos Holding A/S Heat transfer system
CN203810990U (zh) * 2014-05-08 2014-09-03 浙江杭特容器有限公司 一种快速换热器

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2691242B1 (fr) * 1992-05-13 1994-07-08 Valeo Thermique Moteur Sa Boite a eau a vase d'expansion integre pour echangeur de chaleur, en particulier pour vehicule automobile.
DE4320343C2 (de) * 1993-06-19 2002-11-21 Behr Gmbh & Co Wärmetauscher, insbesondere Querstromkühler für Brennkraftmaschinen
DE202006000396U1 (de) * 2005-02-18 2006-06-14 Ebm-Papst St. Georgen Gmbh & Co. Kg Wärmetauscher
DE102006005035B3 (de) * 2006-02-03 2007-09-27 Airbus Deutschland Gmbh Kühlsystem
US9448018B2 (en) * 2012-11-19 2016-09-20 Robert Cooney Expansion relief header for protecting heat transfer coils in HVAC systems
US20140262172A1 (en) * 2013-03-14 2014-09-18 Koch Heat Transfer Company, Lp Tube bundle for shell-and-tube heat exchanger and a method of use

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2954213A (en) * 1958-02-24 1960-09-27 Marlo Coil Company Heat exchangers
US4450904A (en) * 1978-03-31 1984-05-29 Phillips Petroleum Company Heat exchanger having means for supporting the tubes in spaced mutually parallel relation and suppressing vibration
US20090260386A1 (en) * 2008-04-18 2009-10-22 Klaus Wittmann Heating And Air Conditioning Unit For An Automotive Vehicle
US20120151950A1 (en) * 2010-12-15 2012-06-21 Grundfos Holding A/S Heat transfer system
CN203810990U (zh) * 2014-05-08 2014-09-03 浙江杭特容器有限公司 一种快速换热器

Also Published As

Publication number Publication date
WO2016135245A1 (fr) 2016-09-01
EP3262353A1 (fr) 2018-01-03
FR3033194A1 (fr) 2016-09-02
CN107636403B (zh) 2021-08-17
FR3033194B1 (fr) 2017-03-24
CN107636403A (zh) 2018-01-26

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