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EP1956328A1 - Zweiphasiger Wärmetauscher - Google Patents

Zweiphasiger Wärmetauscher Download PDF

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Publication number
EP1956328A1
EP1956328A1 EP07122881A EP07122881A EP1956328A1 EP 1956328 A1 EP1956328 A1 EP 1956328A1 EP 07122881 A EP07122881 A EP 07122881A EP 07122881 A EP07122881 A EP 07122881A EP 1956328 A1 EP1956328 A1 EP 1956328A1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
fluid
exchanger
pressure
high pressure
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.)
Withdrawn
Application number
EP07122881A
Other languages
English (en)
French (fr)
Inventor
Carlos Martins
Anne-Sylvie Magnier-Cathenod
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 EP1956328A1 publication Critical patent/EP1956328A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/0408—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids
    • F28D1/0426—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids with units having particular arrangement relative to the large body of fluid, e.g. with interleaved units or with adjacent heat exchange units in common air flow or with units extending at an angle to each other or with units arranged around a central element
    • F28D1/0443—Combination of units extending one beside or one above the other
    • 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
    • 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
    • F25B2500/00—Problems to be solved
    • F25B2500/18—Optimization, e.g. high integration of refrigeration components
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0068—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for refrigerant cycles
    • F28D2021/0073—Gas coolers
    • 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
    • F28F2009/004—Common frame elements for multiple cores

Definitions

  • the present invention relates to a dual functional heat exchanger, provided with two heat exchangers each intended to lower the temperature of a fluid.
  • It relates more particularly to a heat exchanger comprising a secondary heat exchanger transferring heat energy between a high pressure fluid and a low pressure fluid, this exchanger being integrated in a main heat exchanger high pressure cooling a fluid by air circulation ambient.
  • dielectric exchangers are frequently used comprising a first fluid / air exchanger inside which circulates a high-pressure refrigerant exchanging heat energy with the ambient air, and a second heat exchanger. inside which circulate the refrigerant under high pressure from the first exchanger and the fluid under low pressure.
  • Classically circuits of this type comprise a first exchanger and a second separate exchanger.
  • This second heat exchanger is called the internal heat exchanger (IHX).
  • IHX internal heat exchanger
  • the connection between the high pressure outlet of the first exchanger and the high pressure inlet of the second exchanger is thus made by a pipe.
  • this high-pressure connection poses many sealing problems over time because the micro movements between the first heat exchanger and the second heat exchanger create internal stresses which, by force, generate micro cracks and leaks. This is particularly the case at the fastening of these pipes on the exchangers.
  • extension means that the first collecting means is made of a single block, or of different parts each similar or uniform over its entire length, comprising only in its cooperation part with the second means collector a suitable shape, for example a recess, for the insertion of said second exchanger.
  • axial means the extension of the first collector means is effected along the extension axis of the collector means.
  • the expression "the two exchangers being located one below the other” means that these two exchangers, one of fluid / air type and the other fluid / fluid, are placed or located at the same level vis-à-vis the air flow, unlike two exchangers placed one behind the other of which one of the exchangers is crossed by the air fluid before the second.
  • the present invention discloses the combination of two specific heat exchangers (one is of the fluid / air type and the other of the fluid / fluid type) in which the first collector means is axially extended, that is to say along its axis of linear extension, to ensure a connection between the two heat exchangers, that is to say that at least one wall (the collector plate) of the first collector is extended to form a wall of one of the collectors of the second exchanger.
  • This architecture makes it possible to realize the assembly at reduced cost because thanks to these two lateral collectors, the heat exchanger can be brazed at once, which allows a saving of time of manufacture and an improvement of the mechanical strength of the finished product .
  • the figure 1 represents a conventional block diagram of a circuit of a refrigerating machine using as a refrigerant CO 2 gas.
  • a compressor 20 drives the fluid by raising the pressure in a heat exchanger 30.
  • the fluid enters the high pressure exchanger through a nozzle 1.
  • the fluid flows in the exchanger 30 and is cooled by the ambient air that passes through the heat exchanger 30. exchanger.
  • the fluid exits through an outlet 2. It enters a second exchanger 40 through an inlet 3. It emerges from an outlet 5 after having circulated in a second exchanger and exchanged calories with the low pressure fluid.
  • the fluid then passes through a pressure reducer 50 which may be a simple necking in a pipe or be a pressure regulator ensuring either a constant pressure difference or a low pressure having a defined value.
  • the low pressure fluid then passes through an evaporator 60 which is in this case a heat exchanger with the ambient environment.
  • This exchanger can be used to cool a liquid such as water for example, in this case it is then a refrigerant / water exchanger, or it can be used to cool the air of a cabin, it is then a fluid / air exchanger.
  • the refrigerant then passes into an accumulator 70 to eliminate pressure peaks.
  • the fluid then enters an inlet 6 in the second exchanger 40 where it cools the high pressure fluid.
  • the low pressure fluid leaves the second exchanger through an outlet 4 to join the suction of the compressor 20.
  • FIGS. 2 to 8 show in more detail an exemplary embodiment of a bi-function heat exchanger according to the invention.
  • This exchanger mainly comprises a first exchanger 30 and a second exchanger 40.
  • the exchanger 30 is a fluid exchanger / ambient air, the high pressure fluid is cooled by the ambient air.
  • This exchanger comprises two vertical side collectors and a large number of flat and thin horizontal tubes connecting the two collectors. Strips of light alloy 33, also called interleaves, very thin folded in accordion form are interposed between the tubes to increase the contact surface between the exchanger and the ambient air flowing between the tubes.
  • the first exchanger is a one-pass interchange.
  • the hot pressurized fluid enters the inlet 1 in the first manifold 31 and flows in the flat tubes to join the manifold 32 (outlet 2) and enters through the inlet 3 into the exchanger 40.
  • the circulation of the fluid in this exchanger between slats provided for this purpose allows to exchange calories with the fluid from the low pressure circuit and therefore colder.
  • the fluid therefore leaves the second heat exchanger at a slightly lower temperature than that of the inlet 3.
  • the fluid then passes through a pressure reducer 50 (here a necking) which allows the fluid to relax in a volume (called by analogy with two-phase refrigeration machines) evaporator 60.
  • a pressure reducer 50 here a necking
  • the fluid transmits frigories to the high-pressure fluid via the exchanger 40 and then enters by suction into the compressor 20.
  • the second exchanger consists of cut, stacked and spaced flat plates forming chambers in which the high-pressure fluid circulates in the even-rank chambers and in the odd-rank chambers the low-pressure fluid so that the low-pressure fluid cools the fluid. high pressure.
  • the collector 32 allows the integrated path between the output 2 of the first exchanger and the inlet 3 of the second exchanger.

Landscapes

  • 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)
EP07122881A 2007-02-06 2007-12-11 Zweiphasiger Wärmetauscher Withdrawn EP1956328A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0700814A FR2912208B1 (fr) 2007-02-06 2007-02-06 Echangeur di phasique

Publications (1)

Publication Number Publication Date
EP1956328A1 true EP1956328A1 (de) 2008-08-13

Family

ID=38512297

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07122881A Withdrawn EP1956328A1 (de) 2007-02-06 2007-12-11 Zweiphasiger Wärmetauscher

Country Status (2)

Country Link
EP (1) EP1956328A1 (de)
FR (1) FR2912208B1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA3041616A1 (en) * 2016-11-11 2018-05-17 Stulz Air Technology Systems, Inc. Dual mass cooling precision system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10102640A1 (de) * 2001-01-20 2002-07-25 Bayerische Motoren Werke Ag Wärmetauscher
US6539746B1 (en) * 1999-04-23 2003-04-01 Valeo Klimatechnik Gmbh High pressure gas cooler for a refrigerant circuit of a motor-vehicle air-conditioning system
FR2846734A1 (fr) * 2002-10-31 2004-05-07 Valeo Thermique Moteur Sa Module d'echangeur de chaleur a plaques comportant une section d'echange de chaleur refroidie a l'air atmospherique, notamment pour un vehicule automobile
US20040261983A1 (en) * 2003-06-25 2004-12-30 Zaiqian Hu Heat exchanger
EP1736716A2 (de) * 2005-06-22 2006-12-27 Sanden Corporation Anordnung zur Klimatisierung für Fahrzeuge

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6539746B1 (en) * 1999-04-23 2003-04-01 Valeo Klimatechnik Gmbh High pressure gas cooler for a refrigerant circuit of a motor-vehicle air-conditioning system
DE10102640A1 (de) * 2001-01-20 2002-07-25 Bayerische Motoren Werke Ag Wärmetauscher
FR2846734A1 (fr) * 2002-10-31 2004-05-07 Valeo Thermique Moteur Sa Module d'echangeur de chaleur a plaques comportant une section d'echange de chaleur refroidie a l'air atmospherique, notamment pour un vehicule automobile
US20040261983A1 (en) * 2003-06-25 2004-12-30 Zaiqian Hu Heat exchanger
EP1736716A2 (de) * 2005-06-22 2006-12-27 Sanden Corporation Anordnung zur Klimatisierung für Fahrzeuge

Also Published As

Publication number Publication date
FR2912208A1 (fr) 2008-08-08
FR2912208B1 (fr) 2016-04-01

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