EP0699292B1 - Wärmetauscher - Google Patents

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Publication number
EP0699292B1
EP0699292B1 EP94911228A EP94911228A EP0699292B1 EP 0699292 B1 EP0699292 B1 EP 0699292B1 EP 94911228 A EP94911228 A EP 94911228A EP 94911228 A EP94911228 A EP 94911228A EP 0699292 B1 EP0699292 B1 EP 0699292B1
Authority
EP
European Patent Office
Prior art keywords
plates
plate
heat exchanger
dimples
ports
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
EP94911228A
Other languages
English (en)
French (fr)
Other versions
EP0699292A1 (de
Inventor
John Edwin 5 Blyth Way Bowman
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.)
Bowman Ej (birmingham) Ltd
Original Assignee
Bowman Ej (birmingham) Ltd
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
Priority claimed from GB939311198A external-priority patent/GB9311198D0/en
Application filed by Bowman Ej (birmingham) Ltd filed Critical Bowman Ej (birmingham) Ltd
Publication of EP0699292A1 publication Critical patent/EP0699292A1/de
Application granted granted Critical
Publication of EP0699292B1 publication Critical patent/EP0699292B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
    • F28F3/042—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element
    • F28F3/044—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element the deformations being pontual, e.g. dimples
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B21D53/04—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of sheet metal
    • 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
    • F28D9/0031—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 paired plates touching each other
    • F28D9/0043—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 paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
    • F28D9/005—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 paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another the plates having openings therein for both heat-exchange media
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2225/00—Reinforcing means
    • F28F2225/02—Reinforcing means for casings

Definitions

  • This invention relates to heat exchangers of the kind comprising a stack of plates which are in sealed engagement one with another to provide spaces between the plates for the flow of two separate fluid streams which are to undergo heat exchange.
  • a known arrangement in widespread use has each plate provided with four ports, one at each corner of a rectangular shape. Two ports are used as inlets for the respective fluids and the other two are as outlets for the same. Each fluid divides into a plurality of streams equal in number to half of the total interplate spaces and each part of the stream flows individually through a different one of the interplate spaces on its way from the one inlet port to the corresponding outlet port. Such an arrangement may be considered as involving parallel streams flow.
  • GB-A-1430491 a series of identical circular plates each have two axially short stub tubes opening from the plate in opposite directions.
  • the plates are assembled together by engaging the upwardly directed tube on the one plate to the downwardly directed tube on the next, which automatically ensures that each upwardly extending one is angularly shifted, relative to the axis of the circular plate, and two interleaved sets of spaces ensue. Fluid is led (countercurrent according to the patent) through the two sets to effect heat exchange. The first fluid flows through the odd numbered spaces and the second one through the even numbered spaces.
  • the heat exchanger of the mentioned prior patent is assembled by making the upwardly extending part of different diameter to the downwardly extending one, telescoping each two connected parts and flaring the smaller one outwardly. This is to fix the parts together both axially and angularly.
  • the assembly is built one plate at a time and a flaring operation to complete the joint is necessary before adding another plate, and so on; moreover (after the first operation) only one end of the part to be flared is available for access by a forming tool, which may dictate the use of ductile material and even then places technical limitations on the design.
  • EP-A-159685 discloses a heat exchanger comprising a stack of plates having dimples which support adjacent plates. However, the dimples of adjacent plates are not in contact with each other and therefore the control of axial spacing of the plates is difficult.
  • GB-A-1430491 discloses a heat exchanger comprising a stack of plates each having two ports. One of the ports of one plate registering with a port of the next plate, and each plate having a collar which is inclined partly to nest with the collar of an adjacent plate.
  • the object of the present invention is to provide an improved heat exchanger of this kind.
  • the invention provides a series heat flow exchanger comprising a stack of identical plates each having two ports each being angularly turned in the same direction with respect to the adjacent plate so that the first port on one plate registers with the second port on the next plate and so on, so as to provide two interleaved sets of spaces for the flow of two fluids of the heat exchange pair, each plate being provided with projections extending towards the adjacent plate, said ports being defined by oppositely extending stub tubes, each plate having a peripheral flange and one plate nesting within the next, characterised in that the plates are square so that the ports are automatically exactly aligned when the plates are assembled into the stack and the registered ports meet end-to-end or telescopically engaged and the projections are dimples which are arranged in patterns projecting from both faces of each plate and in contact with the oppositely projecting dimples from the face of the next adjacent plate in the stack whereby the axial spacing is controlled.
  • the plates square to ensure perfect angular alignment between one stub tube and the next without needing to secure them together by means of a flaring operation.
  • This also enables the stub tubes to make end-to-end contact if desired being later sealingly connected together by furnace brazing; although in order to have faces in contact rather than edges, it is preferred that the one is of a smaller diameter than the other so that they are telescoped together.
  • the location of the stub tubes depends upon the shape of the plates and is such that when one plate is turned relative to the next so that the edges still coincide, then one e.g. upwardly extending stub tube of one plate is aligned with the downwardly extending tube of the next plate and so on.
  • the individual plates have a continuous peripheral flange which is substantially but not quite normal to the plane of the plate and the angle of the flange has some effect on the degree of nesting of one plate within the next.
  • the flange has an outward extension and a downward terminal portion: or it is outwardly rolled. The significance of this is explained hereinafter.
  • the plates have dimples formed on their faces extending in opposite directions and arranged so that in the required angular relationship, the upwardly extending dimples of one plate are aligned with the downwardly extending dimples of the next plate.
  • the assembly may be made, and then the stack of plates compressed to take the dimples into face to face contact thus controlling the extent of the axial compression and ensuring that the flanges are in tight contact one with another along the lengths of the respective flanges, prior to furnace brazing or another sealing operation.
  • the telescoping connection of the stub tubes may be particularly convenient to permit this.
  • the dimples may be conical or hemi-spherical, but truncated cones are preferred.
  • the plates except the end plates are identical to one another and the number of plates (including those end plates) is equal to xn + 1 where x is equal to the sides of the polygon and n is any desired whole number.
  • xn + 1 where x is equal to the sides of the polygon and n is any desired whole number.
  • the heat exchanger of the invention can be inserted into a pair of parallel pipes carrying the heat exchange fluid pair merely by cutting and connecting the ends of the respective parts without needing any additional pipework.
  • a three-plate, two-space heat exchanger will be useful for some purposes, and this will not have co-axial inlets and outlets.
  • each of the end plates is reinforced by a thicker planar cap plate, and the adjacent end plate is identical to the intermediate plates except that it has dimples only on the face adjacent the next intermediate plate and not on the face adjacent the cap plate. The significance of this is described later herein.
  • FIG. 1 a square intermediate plate 10 is shown in Figure 1 therein having, in this case, nineteen rows of dimple-like projections arranged with projections extending to one or other of the opposite faces of the plate.
  • the dimples are pitched apart at equal intervals in regular pattern, and the rows of dimples are staggered at half pitch intervals.
  • the plate is provided with a pair of apertures 50,52 symmetrically related to a perpendicular bisecting the length dimension and at a like spacing from a second perpendicular at right angles to the first and bisecting the transverse dimension.
  • Two areas of the plate have dimples which are all upwardly directed (the area around point 6) or downwardly directed (around point 8) and these are arranged according to the direction through which the plates are turned in making the assembly, so that dimples are directed away from a port 50, 52 aligned therewith.
  • one of the projections is in the form of a stub tube or collar 54 projecting in one direction and the second 56 in the opposite direction.
  • the stub tubes are designed so that they can be sealably joined to the next, for example by furnace brazing and for this purpose the stub tubes may be telescopically engaged, or abutted end-to-end as mentioned.
  • non-circular plates are particularly convenient since the edges of the plates hold the tubes in exact angular alignment with no risk of the stub tubes becoming non-coaxial which would at least open up gaps preventing their sealing by furnace brazing and which could make the heat exchanger useless by allowing mixing of the fluids involved in heat exchange if such a heat exchanger were put into use.
  • Each plate has an upstanding peripheral edge 30 which is slightly inclined so that the next plate may be partially nested.
  • Figure 4 The arrangement of these intermediate plates according to Figure 1 in a typical heat exchanger is shown in Figure 4.
  • the number of spaces will always be a multiple of 4, and the number of plates will be a like multiple plus 1 so as to provide e.g. 5, 9, 13 ... plates.
  • Figure 4 shows five plates, and hence four inter-plate spaces.
  • the stack of plates includes both intermediate plates and two end plates 70,72.
  • Plate 70 is shown in Figure 6. This plate as illustrated has dimples 42 extending only in a downward direction as seen in Figure 4, and these dimples are located in exactly the same positions as the downwardly directed dimples in Figure 1, when the plate is in the same angular position as in Figure 1.
  • plate 72 has dimples 42 extending only in a upwards direction but located in exactly the same positions as the upward dimples in Figure 1 subject to the same angular position.
  • These plates are simple to manufacture since one and the same set of pressing tools can be used to make all of the intermediate plates and all the end plates.
  • the forming dies, upper and lower ones respectively, are provided with inserted pins to form the dimples, and the pins are simply omitted where dimples are not required and included where they are required.
  • the arrangement of dimple-like projections in each row is such that the face 40 of each dimple 42 contacts the similar face of the aligned dimple on the next plate 10, 70, or 72 as the case may be so as to assist in controlling the spacing of the plates when the latter are subject to compression in assembly prior to brazing or otherwise joining together, and the dimples are intended to become brazed together to provide great structural strength.
  • the effect of the dimples is also to provide a plurality of flow paths across the plates leading to turbulence and mixing, and provide additional surface for heat exchange from fluid to plate and plate to fluid.
  • the brazing essentially joins the edges of the plates together and the stub tubes together and desirably the dimples together.
  • reinforcement cap plates 20 which are relatively thick and solid plates, apertured to allow connection tubes 14, 16 to be added the assembly and located immediately next to the end plates 70, 72.
  • the cap plates are substantially identical to one another and are dimensioned to fit within the peripheral edge 30.
  • the absence of dimples projecting towards the cap plate from the adjacent end plates 70, 72 enables the cap to become brazed in face-to-face contact over substantially its entire area with the adjacent end plate. This contributes greatly to the pressure capability of the complete heat exchanger.
  • Figure 5 shows a fragmentary section through a nine plate assembly according to the invention, this comprising seven intermediate plates 10 1 , 10 2 , 10 3 ...10 7 .
  • the sectional drawing is made through three of the downwardly directed dimples in one row of plate 10 1 ( Figure 1) on the lefthand side of Figure 5, and then through three upwardly directed dimples in the adjacent row, on the righthand side of Figure 5.
  • This illustrates the alternating dimension axially of the stack of the inter-plate spaces which improves flow therein, reduces film effects and thus improves heat exchange.
  • one fluid of the heat exchange pair flows through spaces 90, 92, 94, 96 in series (or in the reverse order), whilst the other flows through spaces 98, 100, 102, 104 in series (or in the reverse order).
  • the assembly is made by arranging the plates in a stack with each turned 90°, always in the same direction, relative to the next plate.
  • the arrangement of the dimples is such that each downwardly directed dimple then becomes aligned with an upwardly directed dimple (and vice versa).
  • the dimples With the end plates 70, 72 the dimples are directed inwardly of the stack and essentially planar faces are disposed towards the reinforcing cap plates.
  • a modification in Figure 8 also contributes to the pressure capability.
  • the edge 30 is rolled at 80.
  • the rolling can be through less than 180° or more than 180°.
  • the equivalent can be formed by a series of angularly related planar portions namely an outwardly projecting flange and then at least a downwardly projecting flange. The result is to stiffen each plate and there may also be some advantage in providing a natural groove between each two plates when assembled together, extending about their periphery, which will accommodate a fillet of the brazing material used in completing the assembly.
  • Short lengths of tube may be fixed to the stub tubes 50,52 which project from opposite ends of the complete assembly and may be connected by the furnace brazing or like operation which seals all of the parts of the assembly.
  • These tubes may for example be internally screw threaded so as to connect existing pipes to the heat exchanger. It will be appreciated that one of the tubes at one end is to open to the interplate space between the first pair of plates 10 and the other at the same end to the second interplate space between the second and third plates 10, and similary at the other end.
  • Figure 5 shows clearances between the parts, prior to pressure clamping and brazing or other sealing to complete the manufacturing process.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Power Steering Mechanism (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Claims (6)

  1. Reihenfluß-Wärmetauscher enthaltend einen Stapel identischer Platten (101 bis 107 in Fig.5), von denen jede zwei Öffnungen (54, 56) aufweist, wobei jede Platte um einen Winkel in dieselbe Richtung relativ zur benachbarten Platte so gedreht ist, daß die erste Öffnung (54) einer Platte mit der zweiten Öffnung (56) der nächsten Platte in Kontakt kommt und entsprechend fortfolgend, wodurch zwei abwechselnd zueinander angeordnete Zwischenraumreihen entstehen, in denen zwei Fluids des Wärmetauschers fließen können, wobei jede Platte mit Vorsprüngen versehen ist, die sich auf die nächste Platte zu erstrecken, und die Öffnungen (54, 56) aus sich in entgegengesetzte Richtungen erstreckenden Röhrenabschnitten bestehen und wobei jede Platte einen Randflansch (30) aufweist und jeweils eine Platte in die andere einrastet,
    dadurch gekennzeichnet,
    daß die Platten quadratisch sind, wodurch die Öffnungen automatisch genau miteinander fluchten, wenn die Platten zu einem Stapel zusammengesetzt sind, und daß die zusammenwirkenden Öffnungen mit ihren Enden aneinander anliegen oder teleskopartig ineinander eingreifen und die Vorsprünge als Ausbuchtungen (42) ausgeformt sind, die in Mustern angeordnet sind, welche von beiden Flächen einer Platte vorstehen und die entgegengesetzt vorspringenden Ausbuchtungen der Fläche der nächsten, im Stapel benachbarten Platte berühren, wodurch die axialen Zwischenräume festgelegt werden.
  2. Reihenfluß-Wärmetauscher nach Anspruch 1, wobei der Randflansch (30) jeder Platte im Bereich (80) nach außen umgebogen ist.
  3. Reihenfluß-Wärmetauscher nach Anspruch 1 oder 2, wobei weiterhin Endplatten (70, 72) in jedem Stapel vorgesehen sind, welche nur auf der den anderen Platten im Stapel zugewandten Fläche vorstehende Ausbuchtungen aufweisen.
  4. Reihenfluß-Wärmetauscher nach Anspruch 3, wobei weiterhin zur Verstärkung an den Enden des Stapels ebene Abdeckplatten vorgesehen sind.
  5. Reihenfluß-Wärmetauscher nach einem der vorangegangenen Ansprüche, wobei die vorspringenden Ausbuchtungen (42) auf jeder Platte, die einer Öffnung (54, 56) auf einer benachbarten Platte gegenüberliegen, so angeordnet sind, daß sie sich von der benachbarten Platte weg erstrecken.
  6. Reihenfluß-Wärmetauscher nach einem der vorangegangenen Ansprüche, wobei die Ausbuchtungen (42) kegelstumpfförmig gestaltet sind.
EP94911228A 1993-05-29 1994-03-25 Wärmetauscher Expired - Lifetime EP0699292B1 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
GB9311198 1993-05-29
GB939311198A GB9311198D0 (en) 1993-05-29 1993-05-29 Heat exchanger
GB9325148 1993-12-08
GB939325148A GB9325148D0 (en) 1993-05-29 1993-12-08 Heat exchanger
PCT/GB1994/000632 WO1994028367A1 (en) 1993-05-29 1994-03-25 Heat exchanger

Publications (2)

Publication Number Publication Date
EP0699292A1 EP0699292A1 (de) 1996-03-06
EP0699292B1 true EP0699292B1 (de) 1998-06-10

Family

ID=26302980

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94911228A Expired - Lifetime EP0699292B1 (de) 1993-05-29 1994-03-25 Wärmetauscher

Country Status (8)

Country Link
EP (1) EP0699292B1 (de)
AT (1) ATE167284T1 (de)
AU (1) AU6379894A (de)
DE (1) DE69411007T2 (de)
DK (1) DK0699292T3 (de)
ES (1) ES2120027T3 (de)
GB (1) GB2278430B (de)
WO (1) WO1994028367A1 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AUPP410598A0 (en) 1998-06-15 1998-07-09 Aos Pty Ltd Heat exchangers
FR2795167B1 (fr) * 1999-06-21 2001-09-14 Valeo Thermique Moteur Sa Echangeur de chaleur a plaques, notamment pour refroidir une huile d'un vehicule automobile
US6364006B1 (en) * 1999-12-23 2002-04-02 Visteon Global Technologies, Inc. Beaded plate for a heat exchanger and method of making same
DE10153877A1 (de) * 2001-11-02 2003-05-15 Behr Gmbh & Co Wärmeübertrager
CN101387480B (zh) * 2008-09-05 2010-06-09 山东北辰压力容器有限公司 圆点式宽流道全焊式换热板
RU2462677C1 (ru) * 2011-04-13 2012-09-27 ГОСУДАРСТВЕННОЕ ОБРАЗОВАТЕЛЬНОЕ УЧРЕЖДЕНИЕ ВЫСШЕГО ПРОФЕССИОНАЛЬНОГО ОБРАЗОВАНИЯ "Брянский государственный технический университет" Матрица пластинчатого теплообменника
SE541412C2 (en) * 2013-09-17 2019-09-24 Swep Int Ab A plate heat exchanger having reinforcing means
FR3086377A1 (fr) * 2018-09-25 2020-03-27 Valeo Systemes Thermiques Plaque constitutive d'un echangeur de chaleur et echangeur de chaleur comprenant au moins une telle plaque

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE474430A (de) *
GB1199067A (en) * 1967-11-24 1970-07-15 Rosenblads Patenter Ab An Arrangement in Heat Exchangers of the Plate Type
FR2216539B1 (de) * 1973-02-02 1976-09-10 Chaffoteaux Et Maury
FR2314461A1 (fr) * 1976-05-07 1977-01-07 Dieu Andre Echangeur de chaleur
US4554719A (en) * 1983-04-01 1985-11-26 Nutech Energy Systems, Inc. Machine and method for the manufacture of an air-to-air heat exchanger
DE3415733A1 (de) * 1984-04-27 1985-10-31 Fischbach GmbH & Co KG Verwaltungsgesellschaft, 5908 Neunkirchen Verfahren zur herstellung der platten eines plattenwaermetauschers und aus den platten hergestellter waermetauscher
US4569391A (en) * 1984-07-16 1986-02-11 Harsco Corporation Compact heat exchanger

Also Published As

Publication number Publication date
ES2120027T3 (es) 1998-10-16
ATE167284T1 (de) 1998-06-15
GB2278430B (en) 1997-04-23
AU6379894A (en) 1994-12-20
GB2278430A (en) 1994-11-30
DE69411007D1 (de) 1998-07-16
EP0699292A1 (de) 1996-03-06
GB9406020D0 (en) 1994-05-11
WO1994028367A1 (en) 1994-12-08
DE69411007T2 (de) 1998-10-22
DK0699292T3 (da) 1999-03-22

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