EP1265045B1 - Verdampfer mit hoher Kälteleistung für Kraftfahrzeugklimaanlage - Google Patents

Verdampfer mit hoher Kälteleistung für Kraftfahrzeugklimaanlage Download PDF

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Publication number
EP1265045B1
EP1265045B1 EP02012050A EP02012050A EP1265045B1 EP 1265045 B1 EP1265045 B1 EP 1265045B1 EP 02012050 A EP02012050 A EP 02012050A EP 02012050 A EP02012050 A EP 02012050A EP 1265045 B1 EP1265045 B1 EP 1265045B1
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EP
European Patent Office
Prior art keywords
elementary
path
heat exchanger
belonging
collecting
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.)
Expired - Lifetime
Application number
EP02012050A
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English (en)
French (fr)
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EP1265045A3 (de
EP1265045A2 (de
Inventor
Frédéric Bousquet
Sylvain Moreau
Jean-Michel Bouzon
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 Climatisation SA
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Valeo Climatisation SA
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Publication date
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Publication of EP1265045A2 publication Critical patent/EP1265045A2/de
Publication of EP1265045A3 publication Critical patent/EP1265045A3/de
Application granted granted Critical
Publication of EP1265045B1 publication Critical patent/EP1265045B1/de
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Classifications

    • 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
    • F28F9/0202—Header boxes having their inner space divided by partitions
    • F28F9/0204—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions
    • 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
    • F28D1/03—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 plate-like or laminated conduits
    • F28D1/0308—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 plate-like or laminated conduits the conduits being formed by paired plates touching each other
    • F28D1/0325—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 plate-like or laminated conduits the conduits being formed by paired plates touching each other the plates having lateral openings therein for circulation of the heat-exchange medium from one conduit to another
    • F28D1/0333—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 plate-like or laminated conduits the conduits being formed by paired plates touching each other the plates having lateral openings therein for circulation of the heat-exchange medium from one conduit to another the plates having integrated connecting members
    • F28D1/0341—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 plate-like or laminated conduits the conduits being formed by paired plates touching each other the plates having lateral openings therein for circulation of the heat-exchange medium from one conduit to another the plates having integrated connecting members with U-flow or serpentine-flow inside the conduits
    • 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
    • F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators
    • F28F9/262—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators for radiators
    • 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
    • F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
    • F28D2021/0085—Evaporators

Definitions

  • the invention relates to a heat exchanger defining a combined path for a first fluid formed of a multiplicity first elementary paths and a combined path for a second fluid formed of a multiplicity of seconds elementary paths, the first and second paths elementary being alternately arranged in a first direction so that each elementary path for one fluids in thermal contact with at least one path adjacent elementary for the other fluid, each first elementary path having a U-shaped configuration of which both branches extend in a second direction and are shifted relative to each other in a third direction, the first, second and third directions being substantially perpendicular to each other, every second elementary path extending into the third direction of an entrance face of the exchanger, close to a first branch of the first elementary journeys, at a exit face, close to the second branch of the first elementary paths, the two branches of each first elementary path opening into collecting spaces respective spaces, the collecting spaces connected to said first branches and those connected to said second branches being aligned in the first direction in first and second rows respectively, and the collecting spaces communicating two by two in order to establish a combined path
  • Such heat exchangers are used in particular as evaporators in vehicle air conditioning loops, the first fluid being a circulating refrigerant in the loop, and the second fluid being air intended for the passenger compartment of the vehicle.
  • Evaporators are known in particular in which the refrigerant circulates along a combined path in six passes, a first subset of first elementary journeys defining a first pass starting from a first collector space belonging to the second row and a second pass leading to a second collector space belonging to the first row, a second subset of first elementary paths defining a third pass starting from a third collector area, next to the second collecting space in the first row and communicating with this one, and a fourth pass ending in a fourth collector space next to the first collecting space in the second row and separated from it by a partition, and a third subset of first elementary paths defining a fifth pass starting from a fifth collector space next to the fourth collector space in the second row and communicating with it and a sixth pass leading to a sixth collecting area neighbor of the third collector space in the first row and separated from it by a partition.
  • the coolant flows from the second face to the first face of the evaporator, that is, against the current of the air, while flows from the first face to the second face, that is to say in the same direction as the air, between the third pass and the fourth pass.
  • evaporator is known from US-5,355,947.
  • the object of the invention is in particular to improve the characteristics refrigerators of the evaporator, both in terms of cooling capacity in terms of homogeneity of the cooled air temperature of a second elementary path to the other.
  • the invention aims in particular at a heat exchanger of the kind defined in the introduction, and provides that at least one transition is provided between two collector respectively to the two rows, so that, in the first elementary journeys communicating directly with these two collecting spaces, the fluid circulates from one branch to another in the same direction in relation to the third direction.
  • FIG. 1 is a top view in section of an evaporator according to the invention.
  • Figure 2 is a graph showing performance respective refrigerators of an evaporator according to the invention and a conventional circuit evaporator.
  • FIG. 1 represents an evaporator according to the invention, in cut along the plane passing through the axes of the two rows of collecting spaces.
  • This evaporator consists essentially by a stack of pockets and inserts corrugated as described for example in FR 2 747 462 A, which can be referred to for more details on the structure of this stack.
  • Each pocket 1 is formed of two sheet metal plates stamped in the form of bowls 2 and 3. These are identical to each other and have their concavities turned towards each other, respectively to the right and to the left of the figure.
  • Each bowl has a peripheral edge 4 located in a perpendicular plane to that of the figure, and the peripheral edges 4 two cups forming a pocket are mutually assembled in a fluid-tight manner, for example by brazing, to delimit the interior volume of the pouch.
  • Each pouch has two head regions 5 and 6, located respectively down and up in the figure, defined by deep-drawn plates 2, 3. The head regions 5 and 6 occupy a minority faction of the height of the evaporator at the top of it, the rest of the height, behind the plane of the figure, being occupied by a region of bodies of smaller thickness.
  • regions 5 and 6 of each pouch are separated from each other by a zone of tight junction 7 between the two cuvettes at mid-width of the pocket, this junction zone extending downwards to the vicinity of the bottom end of the pouch in order to define in the body region thereof a elementary U-shaped path for the refrigerant fluid between these two volumes.
  • a plate 2 and a plate 3 neighbors belonging two different pockets are mutually supportive their funds 8 in regions 5 and 6, and separated one from the other, in the body region, by a packed gap a corrugated spacer defining an elementary path for the air to be cooled, parallel to the plane of the figure, according to the arrow F1. Funds 8 in mutual contact are brazed together and some of them are crossed by openings 9 making the volumes communicate with each other corresponding interiors.
  • the evaporator comprises an inlet insert of fluid 10 and a fluid outlet insert 11 which are stacked with the pockets 1, each insert being interposed between regions 5 and 6 of a pocket on the one hand and the regions 5 and 6 of another pocket on the other hand.
  • the inserts 10 and 11 are for example of the type described in FR 2 757 618 A.
  • the inserts 10 and 11 are both identical and define each an inlet or outlet tubing 12 protruding with respect to the inlet face 13 of the evaporator, that is to say the face through which the F1 airflow enters, and a interior volume divided by a partition 14 into a part 15 which communicates with the interior volumes of regions 5 of pockets and a part 16 which communicates with the interior volumes of regions 6 of these pockets.
  • the refrigerant entering the evaporator through the inlet tubing 12 of the insert 10 is distributed, via of volume 15, between the internal volumes of regions 5 between an end 20 of the evaporator, located on the left of the figure, and a partition 17 formed by the bottoms of two basins without opening 9, these interior volumes forming a first collector space 21.
  • the collector space 21 From the collector space 21, the fluid travels in parallel elementary paths in U delimited by the pouches that define it, the branches close to the face 13 and the branches close to the opposite face or face of output 18 respectively forming a first pass and a second pass, the latter leading to a second space collector 22 formed by the interior volumes of the regions 6 the same pouches that form the collecting space 21.
  • the collector space 22 communicates through openings 9-1 with a third collector space 23, which is connected to its turn to a fourth collector space 24, separated from the space 21 through the partition 17, through elementary paths in U forming a third pass and a fourth past.
  • a transition insert 27 is interposed in the stack of pockets, following the pockets defining the collecting spaces 23 and 24.
  • the insert 27 defines a unitary internal volume 28 extending over any the width of the evaporator, not communicating with the outside of it, separated from the space 23 by a wall 29 and communicating with space 24.
  • volume 28 communicates with a collecting space 25 formed by the volumes of the regions 6 of the pockets located to the right of the insert 27 and up to the right end 30 of the evaporator, and is separated by a wall 31 of a collecting space 25 formed by the regions 5 of the same pockets.
  • the insert 27 passes the fluid of the fourth space manifold 24, located in the row near the face 13, at fifth collector space 25, located in the near row from the face 18, from where he gets through, through U-shaped elementary paths forming fifth and sixth passes, at the sixth collector space 26, which communicates with the outlet tubing 12 via the volume 15 of the output insert 11.
  • the cooling fluid circulates twice in a row in the opposite direction of the air according to the arrow F2, namely between the third and fourth passes and between the fifth and sixth passes, the circulation in the same direction as air, according to the arrow F1, only between the first two passes.
  • This circuit improves the cooling capacity of the evaporator by compared to the conventional circuit in which the fluid refrigerant flows in the opposite direction of the air between the two first passes and between the last two passes, and in the same meaning as this one between the third and the fourth passes.
  • Figure 2 in which the curve in solid line and the curve in broken line represent the variation of the cooling capacity produced according to the air flow, respectively for a evaporator according to the invention and for a similar evaporator conventional circuit.
  • the total surface of the holes 32 is included between 3 and 10%, and preferably between 4 and 6%, of the surface of the openings 9 interconnecting two volumes belonging to the same collecting space, or communicating between them two collecting spaces.
  • the evaporator has been described above assuming that the leading regions of the pockets lie at the superior, it can also be oriented differently.
  • the heat exchanger according to the invention may comprise more than one transition insert.
  • the input insert and / or the output insert can be suppressed according to the implantation of the tubings entry and exit.
  • the number of passes can be different six.
  • the heat exchanger can exert another function than that of an air conditioning evaporator vehicle, and can be realized according to another technology than that of stacked pouches.

Claims (10)

  1. Wärmetauscher, insbesondere Verdampfer für eine Fahrzeug-Klimaregelungsschleife, der eine von einer Vielzahl von ersten Elementarbahnen gebildete, kombinierte Bahn für ein erstes Fluid und eine von einer Vielzahl von zweiten Elementarbahnen gebildete, kombinierte Bahn für ein zweites Fluid definiert, wobei die ersten und zweiten Elementarbahnen in einer ersten Richtung abwechselnd angeordnet sind, so dass jede Elementarbahn für eines der Fluide mit mindestens einer benachbarten Elementarbahn für das andere Fluid in Thermokontakt steht, wobei jede erste Elementarbahn U-förmig ausgebildet ist und die beiden Zweige des U in einer zweiten Richtung verlaufen und zueinander in einer dritten Richtung versetzt sind, wobei die erste, zweite und dritte Richtung im wesentlichen senkrecht zueinander sind, wobei jede zweite Elementarbahn sich in der dritten Richtung von einer Eingangsfläche (13) des Wärmetauschers nahe einem ersten Zweig der ersten Elementarbahnen zu einer Ausgangsfläche (18) nahe dem zweiten Zweig der ersten Elementarbahnen erstreckt, wobei die beiden Zweige jeder ersten Elementarbahn in jeweiligen Kollektorräumen münden, wobei die Kollektorräume (21, 24, 26), die mit den ersten Zweigen verbunden sind, und diejenigen (22, 23, 25), die mit den zweiten Zweigen verbunden sind, in der ersten Richtung in ersten bzw. zweiten Reihen fluchtend angeordnet sind, und die Kollektorräume paarweise miteinander in Verbindung stehen, um eine kombinierte Bahn zu erzeugen, die sich von einem Eingangskollektorraum (21) zu einem Ausgangskollektorraum (26) erstreckt, die sich an entgegengesetzten Enden (20, 30) des Wärmetauschers in der ersten Richtung befinden, dadurch gekennzeichnet, dass mindestens ein Übergangsdurchlass (28) zwischen zwei Kollektorräumen (24, 25) ausgebildet ist, die zu je einer der beiden Reihen gehören, so dass in den direkt mit diesen beiden Kollektorräumen in Verbindung stehenden ersten Elementarbahnen das Fluid von einem Zweig zum anderen bezüglich der dritten Richtung in gleicher Richtung (F2) fließt.
  2. Wärmetauscher nach Anspruch 1, bei dem in den ersten Elementarbahnen, die direkt mit den beiden Kollektorräumen in Verbindung stehen, das Fluid vom zweiten Zweig zum ersten Zweig fließt.
  3. Wärmetauscher nach Anspruch 2, der sechs Kollektorräume aufweist, die nacheinander vom ersten Fluid durchflossen werden und für dieses eine kombinierte Bahn mit sechs Durchgängen definieren, ausgehend von einem ersten Kollektorraum (21), der zur ersten Reihe gehört, und mündend in einem sechsten Kollektorraum (26), der zur ersten Reihe gehört, und bei dem ein einziger Übergangsdurchlass (28) ausgebildet ist, der vom vierten Kollektorraum (24), der zur ersten Reihe gehört, zum fünften Kollektorraum (25) führt, der zur zweiten Reihe gehört.
  4. Wärmetauscher nach einem der vorhergehenden Ansprüche, der eine Vielzahl von in der ersten Richtung gestapelten Taschen (1) aufweist, die je einen Körperbereich, der eine der ersten Elementarbahnen definiert, und zwei Kopfbereiche (5, 6) größerer Dicke als der Körperbereich aufweisen, die diesem in der zweiten Richtung benachbart und einander in der dritten Richtung benachbart sind, wobei die Kopfbereiche von zwei benachbarten Taschen des Stapels je Wände (8) aufweisen, die gegeneinander angelegt sind, während ihre Körperbereiche zwischen sich eine zweite Elementarbahn begrenzen, wobei jeder Kollektorraum vom Innenvolumen eines Kopfbereichs oder von den Innenvolumen von Kopfbereichen mehrerer Taschen gebildet wird, die miteinander über in den Wänden ausgebildete Öffnungen (9) in Verbindung stehen, wobei jeder Übergangsdurchlass von einem Übergangseinsatz (27) definiert wird, der zwischen zwei Taschen des Stapels eingefügt ist und einerseits mit dem Innenvolumen eines Kopfbereichs (5) einer dieser beiden letzteren Taschen, die zur ersten Reihe gehört, und andererseits mit dem Innenvolumen eines Kopfbereichs (6) der anderen Tasche in Verbindung steht, die zur zweiten Reihe gehört.
  5. Wärmetauscher nach Anspruch 4, bei dem mindestens ein Eingangs- oder Ausgangseinsatz (10, 11) für das erste Fluid vorgesehen ist, der zwischen zwei Taschen des Stapels eingefügt ist und einen Eingangs- oder Ausgangs-Rohransatz (12) definiert, der auf einer der Eingangs- und Ausgangsflächen des Wärmetauschers vorsteht, die er mit den Innenvolumen der Kopfbereiche (5) dieser beiden letzteren Taschen in Verbindung setzt, die zu einer der Reihen gehören, und die Innenvolumen der Kopfbereiche (6) der gleichen Taschen miteinander in Verbindung setzt, die zur anderen Reihe gehören.
  6. Wärmetauscher nach einem der vorhergehenden Ansprüche, bei dem Perforationen (32) in mindestens einer Trennwand (29) ausgebildet sind, die zwei benachbarte Kollektorräume (23, 25) einer gleichen Reihe voneinander trennt, um einen Fluchtweg für das erste Fluid in Ableitung von der oder den ersten Elementarbahn(en) zu erzeugen, die zwischen diesen beiden Kollektorräumen eingefügt sind.
  7. Wärmetauscher nach Anspruch 6 in Zusammenhang mit Anspruch 4, bei dem die Perforationen in einer Wand (29) des Übergangseinsatzes (27) ausgebildet sind.
  8. Wärmetauscher nach einem der Ansprüche 6 und 7 in Zusammenhang mit Anspruch 3, bei dem der Fluchtweg zwischen dem dritten und dem fünften Kollektorraum erzeugt wird.
  9. Wärmetauscher nach einem der Ansprüche 6 bis 8, bei dem die Gesamtfläche der in einer Trennwand ausgebildeten Perforationen zwischen 3 und 10 % und vorzugsweise zwischen 4 und 6 % des Durchlassquerschnitts (9) zwischen zwei Kollektorräumen liegt, die direkt miteinander in Verbindung stehen.
  10. Wärmetauscher nach einem der Ansprüche 6 bis 9, bei dem die Perforationen einen Durchmesser zwischen 1 und 3 mm haben.
EP02012050A 2001-06-07 2002-05-31 Verdampfer mit hoher Kälteleistung für Kraftfahrzeugklimaanlage Expired - Lifetime EP1265045B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0107452 2001-06-07
FR0107452A FR2825791B1 (fr) 2001-06-07 2001-06-07 Evaporateur de puissance frigorifique elevee pour boucle de climatisation de vehicule

Publications (3)

Publication Number Publication Date
EP1265045A2 EP1265045A2 (de) 2002-12-11
EP1265045A3 EP1265045A3 (de) 2003-05-28
EP1265045B1 true EP1265045B1 (de) 2004-10-13

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EP02012050A Expired - Lifetime EP1265045B1 (de) 2001-06-07 2002-05-31 Verdampfer mit hoher Kälteleistung für Kraftfahrzeugklimaanlage

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Country Link
EP (1) EP1265045B1 (de)
AT (1) ATE279706T1 (de)
DE (1) DE60201554T2 (de)
FR (1) FR2825791B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101598505B (zh) * 2008-03-25 2013-11-27 法雷奥热系统公司 大制冷能力的热交换器

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10229973A1 (de) 2002-07-03 2004-01-29 Behr Gmbh & Co. Wärmeübertrager

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5355947A (en) * 1993-10-25 1994-10-18 Chrysler Corporation Heat exchanger having flow control insert
GB9503683D0 (en) * 1995-02-17 1995-04-12 Gen Motors Corp Heat exchanger and coupling member therfor
GB2351800B (en) * 1999-06-29 2001-07-25 Calsonic Kansei Corp Evaporator of automotive air-conditioner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101598505B (zh) * 2008-03-25 2013-11-27 法雷奥热系统公司 大制冷能力的热交换器

Also Published As

Publication number Publication date
EP1265045A3 (de) 2003-05-28
DE60201554T2 (de) 2005-03-24
FR2825791A1 (fr) 2002-12-13
ATE279706T1 (de) 2004-10-15
EP1265045A2 (de) 2002-12-11
FR2825791B1 (fr) 2003-09-05
DE60201554D1 (de) 2004-11-18

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