EP1770346A1 - Wärmetauscher mit versetzten Flachrohren - Google Patents

Wärmetauscher mit versetzten Flachrohren Download PDF

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Publication number
EP1770346A1
EP1770346A1 EP06020556A EP06020556A EP1770346A1 EP 1770346 A1 EP1770346 A1 EP 1770346A1 EP 06020556 A EP06020556 A EP 06020556A EP 06020556 A EP06020556 A EP 06020556A EP 1770346 A1 EP1770346 A1 EP 1770346A1
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EP
European Patent Office
Prior art keywords
tubes
tube
fluid
heat exchanger
faces
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.)
Granted
Application number
EP06020556A
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English (en)
French (fr)
Other versions
EP1770346B1 (de
Inventor
Carlos Martins
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
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Publication of EP1770346A1 publication Critical patent/EP1770346A1/de
Application granted granted Critical
Publication of EP1770346B1 publication Critical patent/EP1770346B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0081—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by a single plate-like element ; the conduits for one heat-exchange medium being integrated in one single plate-like element
    • 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
    • F28D7/0008—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 for one medium being in heat conductive contact with the conduits for the other medium
    • F28D7/0025—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 for one medium being in heat conductive contact with the conduits for the other medium the conduits for one medium or the conduits for both media being flat tubes or arrays of tubes
    • 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
    • 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
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2250/00—Arrangements for modifying the flow of the heat exchange media, e.g. flow guiding means; Particular flow patterns
    • F28F2250/10—Particular pattern of flow of the heat exchange media
    • F28F2250/108—Particular pattern of flow of the heat exchange media with combined cross flow and parallel flow

Definitions

  • the invention relates to a heat exchanger for exchanging heat between a first fluid and a second fluid, comprising a bundle of flat tubes formed by the alternating stack of first tubes for the circulation of the first fluid and second tubes for the circulation of the second fluid, all the tubes of the beam opening into fluid collecting spaces at least on a first face of the beam.
  • the object of the invention is to provide the fluid collection spaces in a simple and economical way with a small footprint.
  • the invention aims in particular at a heat exchanger of the type defined in the introduction, and provides that said collection spaces are formed by recesses formed in a first collector block and at least one of which is associated with each tube, the ends of the second tubes and the corresponding recesses being offset in the longitudinal direction of the tubes, relative to the ends of the first tubes and the corresponding recesses, so that the recess or recesses associated with a first tube are limited in the stacking direction by faces of the first block and that the recess or recesses associated with a second tube are limited in the stacking direction by the faces of the two first adjacent tubes.
  • the invention also relates to a fluid circuit containing a heat exchanger as defined above as an internal exchanger, the first fluid and the second fluid being constituted by the fluid circulating in the circuit, in two locations of this one where it presents different temperatures.
  • the circuit according to the invention may be an air conditioning loop in which circulates a refrigerant fluid working at high pressures such as CO 2 , the first fluid and the second fluid being constituted by the high-pressure refrigerant fluid. and the other by the refrigerant fluid at low pressure.
  • a refrigerant fluid working at high pressures such as CO 2
  • the first fluid and the second fluid being constituted by the high-pressure refrigerant fluid. and the other by the refrigerant fluid at low pressure.
  • Figure 1 is a diagram of a vehicle air conditioning loop containing an internal heat exchanger according to the invention.
  • Figure 2 is a perspective view of a heat exchanger according to the invention.
  • Figure 3 is a corresponding exploded perspective view.
  • FIG. 4 is a partial view of the heat exchanger illustrated in FIGS. 2 and 3, in section along the line IV - IV of FIG. 5.
  • FIGS. 5 and 6 are sectional views of this heat exchanger, respectively along lines V-V and VI-VI of FIG. 4.
  • the air conditioning loop shown in Figure 1 is known in itself in its general design. It comprises a compressor 1 which brings to a high pressure a cooling fluid consisting of CO 2 , followed by a gas cooler 2 which makes it possible to transfer to a flow of air not represented a portion of the heat stored by the refrigerant during its compression by the compressor 1. Downstream of the gas cooler 2 is disposed a path 3H of an internal heat exchanger 3 for further cooling of the fluid.
  • the track 3H is followed by a pressure reducer 4, then an evaporator 5 which is swept by an unrepresented air flow intended to be sent into the passenger compartment of the vehicle.
  • the fluid passes into a reservoir 6.
  • the fluid in the relaxed gas state leaving the reservoir 6 passes into the second path 3B of the internal heat exchanger 3, against the flow of the circulation in lane 3H, to be heated by the high pressure gas flowing in the latter, before returning to the compressor 4.
  • the internal exchanger 3 has the structure illustrated in FIGS. 2 to 6. It comprises an alternating stack of first flat tubes 11 and second flat tubes 12.
  • the exchanger comprises first three tubes 11 and three second tubes 12, each tube having a multiplicity of parallel channels 13, 14 for the circulation of fluid, extending parallel to the longitudinal direction, here vertical, of the tube and opening at both ends thereof.
  • Each tube 11 is associated with an upper plate 15 and a lower plate 17 and each tube 12 is associated with an upper plate 16 and a lower plate 18.
  • the plates 15 and 17 associated with a tube 11 have main faces located in the same plans that the two main faces of this tube, and therefore have the same thickness as this one.
  • the plates 16 and 18 associated with a tube 12 have major faces located in the same planes as the two main faces of this tube, and therefore have the same thickness as this one. In the example shown, this thickness is the same for the tubes 11 and for the tubes 12.
  • Each of the plates 15-18 comprises a main part 20 extending facing the end of the tube over the entire width thereof, and two lateral flanges 21, 22 coming into sealing contact, after soldering, respectively with the two opposite longitudinal edges 23 and 24 of the tube, near its end. Between the main portion 20 of each plate and the corresponding tube end is a fluid collecting space 25 into which all channels 13 or 14 of the tube open.
  • the assembly formed by a first tube 11 and its associated plates 15 and 17 and the assembly consisting of a second tube 12 and its associated plates 16 and 18 have the same outline, and these sets are mutually stacked to produce a cylindrical block.
  • the tubes 11 and 12 have the same length, their upper and lower ends are not located in the same planes.
  • the lower ends of the first tubes 11 and those of the second tubes 12 are located in respective horizontal planes P1 and P2, the plane P1 being shifted upwards by a distance D with respect to the plane P2.
  • the length of the tubes being the same as indicated above, the upper ends of the tubes 11 and those of the tubes 12 are located in respective horizontal planes mutually offset by the distance D.
  • each recess is delimited, towards the inside of the bundle formed by the stack tubes 11 and 12 and plates 15 to 18, by one of these tubes or one of these plates as indicated above, and towards the outside of the beam by a solid outer plate which will be described later, presenting the same outer contour as the plates 15 to 18 but without recess.
  • a notch 30 is formed in the rim 22, located on the right of Figure 5, of each upper plate 15, so as to be adjacent to the side edge 24 of the corresponding tube 11.
  • the notch 30 thus forms an orifice passing through the plate 15, surrounded by the rim 22 and the edge 24, and separated from the recess 25.
  • the orifices 30 of the different plates are mutually aligned and each communicates with the recesses 25 of the adjacent plates 16, so that the recesses 25 and the orifices 30 of all the plates 15 and 16 of the heat exchanger are interconnected to form an inlet manifold for the refrigerant fluid at low pressure.
  • each lower plate 17 is drilled a through hole 32 separated from the recess 25 of the same plate.
  • the holes 32 of the different plates are mutually aligned and each communicates with the recesses 25 of the two adjacent plates 18, the recesses and the holes 32 of the set of plates 18 thereby forming an outlet manifold for the low pressure fluid.
  • the low pressure fluid flows in parallel, from top to bottom, in all the channels 14 of the tubes 12, between the inlet chamber and the outlet chamber.
  • the upper plate 16-tube 12-lower plate assembly 18 shown in FIG. 6 is identical to the lower plate 17-tube 11-upper plate assembly 15 of FIG. 5, and is derived therefrom by a rotation of a half-turn around the central longitudinal axis of the beam and by a translation along this axis of the thickness of a tube.
  • notches 31 in the left flange 21 of the plates 18 cooperate with the recesses 25 of the plates 17 to form an inlet chamber for the high pressure fluid
  • holes 33 passing through the plates 16 cooperate with the recesses 25.
  • the inlet and the outlet of the fluids of the exchanger are made by pipes carried by the outer plates located at one end of the beam.
  • the upper outer plate 26 located at this end, aligned with the upper plates 15 and 16, is crossed by two not shown openings respectively aligned with the openings 30 and the openings 33 and respectively communicating with an inlet pipe 34 for the fluid to low pressure and with an outlet pipe 37 for the high pressure fluid.
  • the lower outer plate 28, aligned with the plates 17 and 18, located at the same end of the bundle as the plate 26 has unshown through openings aligned with the openings 31 and 32 and communicating respectively with an inlet manifold. 35 for the high pressure fluid and with an outlet pipe 36 for the low pressure fluid.
  • the upper and lower outer plates 27, 29 at the opposite end of the bundle are devoid of openings and nozzles.
  • each recess 25 in the longitudinal direction of the tubes is not uniform, but varies gradually in the direction of the width of the tubes. This dimension is maximum at the point where the recess communicates with the openings of the adjacent plates, in the vicinity of one of the lateral edges of the tube, and gradually decreases to the right of the opposite edge of the tube, to take account of the decrease in fluid flow. This variation is advantageous but not necessary.
  • Both fluids can flow in the same direction and not against the current.
  • At least one of the two fluids can flow in the exchanger in two passes or more.
  • this fluid can flow in one direction in one part of the channels of each tube, and in the opposite direction in the other channels.
  • the plate associated with the end of the tube through which the fluid enters and exits then has two separate recesses, cooperating with respective orifices formed in the adjacent plates to contribute to the formation of the inlet and outlet chambers.
  • the channels of the tube can then communicate with each other, at the opposite end thereof, by a recess formed in a plate similar to the plates 15 to 18 but not communicating with any opening of neighboring plates, or by any other known means.
  • a circulation in two passes or more can also be obtained by removing, in at least one plate, the orifice 30 or 31 or 32 or 33, thus separating one of the inlet and outlet chambers described above in one or several chambers aligned in the stacking direction of the beam.
  • the two plates 15 and 17, or 16 and 18, associated with the same tube can be replaced by a single plate by extending and joining on the one hand the two flanges 21, on the other hand the two flanges 22, to form a frame completely surrounding the periphery of the tube. This results in a reduction in the number of parts to manufacture, store and handle during the assembly of the exchanger.
  • plate stacks 15-16 and 17-18 can be replaced by solid blocks in which the recesses 25 and the openings 30-33 are machined, or by other structures.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP06020556A 2005-09-30 2006-09-29 Wärmetauscher mit versetzten Flachrohren Active EP1770346B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0509975A FR2891615B1 (fr) 2005-09-30 2005-09-30 Echangeur de chaleur a tubes plats alternes.

Publications (2)

Publication Number Publication Date
EP1770346A1 true EP1770346A1 (de) 2007-04-04
EP1770346B1 EP1770346B1 (de) 2009-01-21

Family

ID=36784320

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06020556A Active EP1770346B1 (de) 2005-09-30 2006-09-29 Wärmetauscher mit versetzten Flachrohren

Country Status (4)

Country Link
EP (1) EP1770346B1 (de)
AT (1) ATE421670T1 (de)
DE (1) DE602006004937D1 (de)
FR (1) FR2891615B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010060657A1 (fr) * 2008-11-26 2010-06-03 Valeo Systemes Thermiques Condenseur pour circuit de climatisation avec echangeur interne integre
DE102011008429A1 (de) * 2011-01-12 2012-07-12 Behr Gmbh & Co. Kg Vorrichtung zur Wärmeübertragung für ein Fahrzeug
WO2014095572A1 (fr) * 2012-12-21 2014-06-26 Valeo Systemes Thermiques Echangeur de chaleur, notamment pour fluide refrigerant circulant dans un vehicule automobile
EP2667136A4 (de) * 2011-01-18 2016-01-20 Mitsubishi Electric Corp Beschichteter wärmetauscher und wärmepumpensystem damit
EP3819579A1 (de) * 2019-11-07 2021-05-12 Valeo Systemes Thermiques-THS Wärmetauscher

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2967248B1 (fr) 2010-11-10 2015-01-23 Valeo Systemes Thermiques Echangeur de chaleur fluide/fluide

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3860065A (en) 1970-04-08 1975-01-14 Trane Co Distributor for plate type heat exchanger having side headers
DE19519511A1 (de) * 1994-05-31 1995-12-07 Tjiok Mouw Ching Wärmeaustauscher
US6032728A (en) * 1998-11-12 2000-03-07 Livernois Research & Development Co. Variable pitch heat exchanger
EP1160530A1 (de) * 1999-03-04 2001-12-05 Ebara Corporation Plattenwärmetauscher
US20030192682A1 (en) * 2000-06-23 2003-10-16 Andrew Lowenstein Heat exchange assembly
FR2852383A1 (fr) * 2003-03-11 2004-09-17 Valeo Thermique Moteur Sa Boite collectrice pour echangeur de chaleur a haute pression et echangeur de chaleur comportant cette boite collectrice

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3860065A (en) 1970-04-08 1975-01-14 Trane Co Distributor for plate type heat exchanger having side headers
DE19519511A1 (de) * 1994-05-31 1995-12-07 Tjiok Mouw Ching Wärmeaustauscher
US6032728A (en) * 1998-11-12 2000-03-07 Livernois Research & Development Co. Variable pitch heat exchanger
EP1160530A1 (de) * 1999-03-04 2001-12-05 Ebara Corporation Plattenwärmetauscher
US20030192682A1 (en) * 2000-06-23 2003-10-16 Andrew Lowenstein Heat exchange assembly
FR2852383A1 (fr) * 2003-03-11 2004-09-17 Valeo Thermique Moteur Sa Boite collectrice pour echangeur de chaleur a haute pression et echangeur de chaleur comportant cette boite collectrice

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010060657A1 (fr) * 2008-11-26 2010-06-03 Valeo Systemes Thermiques Condenseur pour circuit de climatisation avec echangeur interne integre
DE102011008429A1 (de) * 2011-01-12 2012-07-12 Behr Gmbh & Co. Kg Vorrichtung zur Wärmeübertragung für ein Fahrzeug
EP2667136A4 (de) * 2011-01-18 2016-01-20 Mitsubishi Electric Corp Beschichteter wärmetauscher und wärmepumpensystem damit
WO2014095572A1 (fr) * 2012-12-21 2014-06-26 Valeo Systemes Thermiques Echangeur de chaleur, notamment pour fluide refrigerant circulant dans un vehicule automobile
FR3000187A1 (fr) * 2012-12-21 2014-06-27 Valeo Systemes Thermiques Echangeur de chaleur, notamment pour fluide refrigerant circulant dans un vehicule automobile
CN104995472A (zh) * 2012-12-21 2015-10-21 法雷奥热系统公司 热交换器,特别地用于在机动车辆中循环的制冷剂
CN104995472B (zh) * 2012-12-21 2017-08-04 法雷奥热系统公司 热交换器，特别地用于在机动车辆中循环的制冷剂
EP3819579A1 (de) * 2019-11-07 2021-05-12 Valeo Systemes Thermiques-THS Wärmetauscher

Also Published As

Publication number Publication date
ATE421670T1 (de) 2009-02-15
FR2891615A1 (fr) 2007-04-06
DE602006004937D1 (de) 2009-03-12
FR2891615B1 (fr) 2008-01-11
EP1770346B1 (de) 2009-01-21

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