WO2011016770A1 - Fixation element between plates in a heat exchanger. - Google Patents

Fixation element between plates in a heat exchanger. Download PDF

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Publication number
WO2011016770A1
WO2011016770A1 PCT/SE2010/050866 SE2010050866W WO2011016770A1 WO 2011016770 A1 WO2011016770 A1 WO 2011016770A1 SE 2010050866 W SE2010050866 W SE 2010050866W WO 2011016770 A1 WO2011016770 A1 WO 2011016770A1
Authority
WO
WIPO (PCT)
Prior art keywords
plates
plate
dimple
fastening
adjacent
Prior art date
Application number
PCT/SE2010/050866
Other languages
French (fr)
Inventor
Sven Persson
Original Assignee
Airec Ab
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 Airec Ab filed Critical Airec Ab
Publication of WO2011016770A1 publication Critical patent/WO2011016770A1/en

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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
    • 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
    • F28D9/0037—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 conduits for the other heat-exchange medium also being formed by paired plates touching each other
    • 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
    • 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
    • F28F3/046—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 linear, e.g. corrugations
    • 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
    • F28F3/08—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning

Definitions

  • Fixation element between plates in a heat exchanger Fixation element between plates in a heat exchanger.
  • the present invention relates to a heat exchanger having the features recited in claim 1 with plates stacked in a stack of plates forming intermediate channels.
  • Heat exchangers with plates are constructed by stacking plates on one another to form a stack of plates. It is common to provide soldering material between the plates. The plates with intermediate solder material are put into a furnace where the solder liquefies and solders adjacent plates at each other forming the stack of plates.
  • soldering material between the plates.
  • the plates with intermediate solder material are put into a furnace where the solder liquefies and solders adjacent plates at each other forming the stack of plates.
  • One problem that arises on stacking the plates on one another is that the stack of plates can topple over before the soldering process has started. This is because the plates are not attached to one another.
  • some plates in the stack of plates become displaced relative to one other, whereby a plate becomes incorrectly positioned in the stack of plates in relation to an adjacent plate. This then results in the whole stack of plates having to be discarded.
  • An object of the present invention is that the plates shall be able to be stacked in a stack of plates without additional supporting elements.
  • a further aim of the invention is to provide a heat exchanger that is cost effective compared with conventional technology and which device is simple to construct whereby cost and time can be optimized.
  • An advantage achieved with a heat exchanger having the features recited in claim 1 is that the plates stacked on one other in a stack of plates can be soldered to one another without external assistance such as a support or the like. This is because the plates according to the invention can be stacked without external additional support.
  • the fastening dimple has a cone shape wherein the cone's peak area is represented by the crest of the fastener.
  • the cone shape is good as a force bearing element. This is because the cone has a principally symmetrical structure with essentially straight sides which are all associated with one and the same point or area, the so-called cone peak area. Due to this, the force that is applied to the cone's peak area is divided into several smaller forces which are distributed over the cone's sides.
  • the fastening dimple extends from a neutral plane and in the vertical direction from the neutral plane and its fastener crest extends past a first plane plate that is parallel to the neutral plane.
  • the first plane is arranged on one side of the heat transfer surface's neutral plane.
  • the heat transfer surface has a pattern. This pattern extends to the side of the heat transfer surface between the neutral plane and the first plane.
  • the receiving dimple has a conical section that extends with a section start from the neutral plane and has a first diameter at the neutral plane and in the vertical direction towards and past the first plane and at a distance beyond this plane has an end section with a second diameter that is smaller than the first diameter.
  • the receiving dimple is arranged in the plate to remain the plate's heat transfer surface.
  • the end section has threshold section that is circular and that extends around the receiving dimple.
  • the threshold section consists of an area with a surface that is shaped like a ring. That surface of the threshold section is located in a plane parallel to the plate's neutral plane.
  • the threshold section is arranged at a level outside, or above, the pattern in the plate. Both the pattern and the receiving dimple and the fastening dimple extend in the heat transfer surface from said neutral plane.
  • an inner conical part in the receiving dimple extends from the threshold section and in a direction towards the neutral plane, which part is configured to face an adjacent plate including said fastening dimple.
  • the shape of the receiving dimple is similar to the shape of a crater. The similarity to a crater is made clear, seen in the neutral plane, in that the receiving dimple extends from the neutral plane and in the direction towards and past a first plane parallel to the neutral plane. The first plane is located at a distance from the neutral plane.
  • the length from the neutral plane to the threshold section is longer than the length over which the pattern that extends on the same side of the plate and that extends in the corresponding vertical direction from the neutral plane to the first plane extends.
  • the threshold section thereby, as previously mentioned, becomes located above, or beyond, the pattern in the plate.
  • the receiving dimple comprises an inner part having a conical shape.
  • the inner part extends from the threshold section in a direction centrally through the receiving dimple, in a direction towards the neutral plane. Principally on the level of the neutral plane, the inner cone-shaped part's sides have converged whereby a bottom is consequently formed. This bottom faces the first plane in a direction that extends from the neutral plane towards the first plane.
  • the plates in the stack of plates, which together form the cassettes consist of one plate type.
  • the type plate is arranged with an A- side and a B-side.
  • the A-sides of two adjacent plates face each other.
  • the B-sides of two adjacent plates face each other.
  • a first channel is arranged between two adjacent plates' A-sides.
  • a second channel is arranged between two adjacent plates' B-sides. In this way channels through the stack of plates are obtained where the first channel is adjacent to the second channel via an intermediate plate. A medium that flows through the first channel therefore transfers heat with the second channel through the intermediate plate.
  • One plate between two adjacent plates with B-sides facing each other is in a plane parallel to the neutral plane and is rotated by 180 degrees.
  • the heat transfer surface comprises a pattern that on one side of the plate extends from a neutral plane to a first plane. At a second opposite side the heat transfer surface extends with a pattern that on the second opposite side of the plate extends from the neutral plane according to the above to a second plane.
  • the first and second planes are arranged on each side of the plate's neutral plane and are arranged parallel thereto.
  • the pattern may consist of either dimples or grooves arranged in accordance with known patterns such as a herringbone pattern.
  • Fig. 1 shows part of a stack of plates with two cross sections A-A and B-B.
  • Fig. 2 shows the cross sections AA and BB of Fig. 1 in more detail.
  • Fig. 3 shows a plan view of a receiving dimple.
  • Figure 1 shows part of a stack of plates 1 of a heat exchanger.
  • the stack of plates comprises plates 2, 3, which are stacked on one other.
  • Two adjacent plates 2, 3, form a cassette.
  • Two cross sections A-A and B-B are shown through the stack of plates in figure 1.
  • the cross-sections A-A and BB are shown in more detail in Figure 2 and explained in more detail in the related text below.
  • Figure 2 shows two adjacent cross-sections arranged through the stack of plates 1.
  • the left-hand side of the figure shows the cross section A-A through a portion of the plates 2, 3, including arrangements for the mitigation of shear between two adjacent plates forming a plate cassette 4, 6.
  • the right-hand side of the figure shows the cross-section B-B through some of the plates 2, 3, including arrangements for the mitigation of shear between two adjacent cassettes 4, 6.
  • the thick horizontal line through the stack of plates has been included in the figure in order to clarify said left- and right-hand side of the figure.
  • Figure 2 shows a first and a second cassette 4, 6, which cassettes include a first plate 2 and a second plate 3.
  • a first channel 5 is arranged in each cassette 4, 6.
  • a second channel 7 is arranged between two adjacent cassettes 4, 6.
  • Each channel 5, 7, is configured to have a medium flow therethrough.
  • Each medium in each adjacent channel 5, 7, exchanges heat with the other via an intermediate plate's 2, 3, heat transfer surface.
  • Two adjacent plates 2, 3, that form a cassette 4, 6, are arranged with at least one inner fastening dimple 8a and an inner receiving dimple 10a.
  • the inner fastening dimple 8a extends from a neutral plane 0 arranged through the plate 3, which is parallel to the plate's 3 heat transfer surface, in a direction inwards into the cassette 4, 6, and past a plane referred to as the second plane II.
  • This second plane Il is in the stack of plates 1 arranged between two neutral planes 0.
  • an adjacent plate 2, 3 which adjacent plate 2, 3 is represented by the second plate of the cartridge 4, 6, for the formation of a cassette.
  • an inner receiving dimple 10a is arranged in said adjacent plate 2, in the corresponding area as for the inner fastening dimple 8a.
  • the fastening dimple 8a includes a fastener crest 9 that is arranged in an area beyond the second plane Il of the fastening dimple's 8a extension from the neutral plane 0.
  • the inner receiving dimple 10a extends with a section start 12a from the plate's 2 neutral plane 0 towards and past the second plane Il to an end section 14a of the inner receiving dimple 10a.
  • a bottom 11a is arranged centrally in the receiving dimple 10a.
  • the receiving dimple 10a has a shape similar to a crater. The bottom 11a shall therefore be seen as being arranged inside the receiving dimple 10a.
  • the end section 14a has the shape of a circle or ring-shaped surface that extends around receiving dimple 10a.
  • Two adjacent cassettes 4, 6, are arranged in the plate with at least one outer fastening dimple 8b and an outer receiving dimple 10b.
  • the outer fastening dimple 8b extends from a neutral plane 0 arranged through the plate 3, which is parallel to the plate's 3 heat transfer surface, in a direction outwards from the first channel 5 arranged in each cassette 4, 6.
  • the outer fastening dimple 8b has a continued extension past a plane referred to as the first plane I.
  • This first plane I is arranged between two neutral planes 0 in the stack of plates 1.
  • the first and second planes I, II, in the stack of plates 1 are arranged on each side of an intermediate neutral plane 0.
  • an adjacent plate 2 which adjacent plate 2, 3 is represented by the plate of an adjacent cassette 4, 6, and whereby the second channel 7 is arranged between adjacent cassettes.
  • an outer receiving dimple 10b is arranged in said plate 3 of the adjacent cassette.
  • This fastening dimple 8b includes a fastening crest 9b which is arranged in an area beyond the first plane I of the outer fastening dimple's 8b extension from the neutral plane 0 in the direction towards an adjacent cassette 4, 6.
  • the outer receiving dimple 10b extends with an outer section start 12b from the plate's 3 neutral plane 0 in a direction towards and past the first plane I to a section end 14b of the outer receiving dimple 10b.
  • An outer bottom 11 b is arranged centrally in the receiving dimple 10b.
  • the receiving dimple 10b has a shape, which in the same way as for the inner receiving dimple 10a, is similar to a crater.
  • the outer bottom 11b must therefore be seen as being arranged inside the outer receiving dimple 10b.
  • the outer end section 14b has the shape of a circle or ring-shaped surface that extends around receiving dimple 10b.
  • Figure 3 shows a receiving dimple 10a, 10b, seen in plan view arranged in part of a plate 2, 3.
  • the receiving dimple 10a, 14b is arranged in the heat transfer surface.
  • One reason why one does not want to arrange the receiving dimple, or the fastening dimple in the edge area of the plates 2, 3, is that it can be difficult for two adjacent plates' edge areas to get close enough together when they bear on each other.
  • the receiving dimple 10a, 10b, according to Fig 3 is provided from the heat transfer surface with a section start 12a, 12b.
  • the receiving dimple thereafter extends in a cone shape to an end section 14a, 14b.
  • This end section consists of a threshold section 16 that is annular.
  • Said section start 12a, 12b, has a first diameter 13 that is greater than a second diameter 15 that the threshold section 16 has.
  • the receiving dimple 10a, 10b, with a conical shape opposite to the first cone shape of said threshold section 16 extends to a bottom 11 of the receiving dimple 10a, 10b.

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  • 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)

Abstract

The invention concerns a heat exchanger comprising plates (2, 3) stacked on one another forming a stack of plates (1). In the stack of plates (1) two adjacent plates (2, 3) are together configured to form a plate cassette (4, 6). A first channel (5) is arranged inside each formed plate cassette (4, 6) and a second channel (7) is arranged between two adjacent cassettes (4, 6). In at least one of two adjacent plates (2, 3) a fastening dimple (8a, 8b) that includes a fastening crest (9a, 9b) is arranged. The fastening crests (9a, 9b) face the adjacent plate (2, 3), whereby in at least one of said two adjacent plates (2, 3) a crater-shaped receiving dimple (10a, 10b) which comprises a bottom (11) is arranged. The bottom (11) faces the adjacent plate (2, 3) including the fastening dimple (8a, 8b), whereby the fastening dimple (8a, 8b) in one plate (2, 3) is configured to be arranged in the crater-shaped receiving dimple (10a, 10b) of the adjacent plate (2, 3). Said adjacent plates (2, 3) thereby become fixed relative to each other in a plane parallel to each plate's heat transfer surface.

Description

Fixation element between plates in a heat exchanger.
Technical field of the invention
The present invention relates to a heat exchanger having the features recited in claim 1 with plates stacked in a stack of plates forming intermediate channels.
Background of the invention
Heat exchangers with plates are constructed by stacking plates on one another to form a stack of plates. It is common to provide soldering material between the plates. The plates with intermediate solder material are put into a furnace where the solder liquefies and solders adjacent plates at each other forming the stack of plates. One problem that arises on stacking the plates on one another is that the stack of plates can topple over before the soldering process has started. This is because the plates are not attached to one another. Sometimes before soldering, some plates in the stack of plates become displaced relative to one other, whereby a plate becomes incorrectly positioned in the stack of plates in relation to an adjacent plate. This then results in the whole stack of plates having to be discarded. To overcome this, methods have been developed in which the plates are inter alia stacked within an external framework that supports the plates and keeps them in the right place. Alternative methods that have also been developed include subjecting an upper part of the stack of plates to an applied pressure, whereby the plates are thereby held in place by means of applied weight. However, these methods pose some complications. When using a framework, the soldering of plates of a different size requires differently sized frameworks. Using a weight to press against the stack of plates results in the process becoming cumbersome because additional tools may be needed to handle the applied weights. An additional disadvantage with the weights is that accidents have occurred in which the stack of plates with applied weight has toppled over whereby tools and furnaces have been damaged. Such accidents can also cause injury to personnel. Summary of the invention
An object of the present invention is that the plates shall be able to be stacked in a stack of plates without additional supporting elements.
A further aim of the invention is to provide a heat exchanger that is cost effective compared with conventional technology and which device is simple to construct whereby cost and time can be optimized.
The above and other aims are achieved according to the invention by providing the above-described device with the features recited in claim 1.
An advantage achieved with a heat exchanger having the features recited in claim 1 is that the plates stacked on one other in a stack of plates can be soldered to one another without external assistance such as a support or the like. This is because the plates according to the invention can be stacked without external additional support.
Preferred embodiments of the device according to the invention have further been provided with the features recited in dependent claims 2-12.
According to an embodiment of the invention the fastening dimple has a cone shape wherein the cone's peak area is represented by the crest of the fastener. The cone shape is good as a force bearing element. This is because the cone has a principally symmetrical structure with essentially straight sides which are all associated with one and the same point or area, the so-called cone peak area. Due to this, the force that is applied to the cone's peak area is divided into several smaller forces which are distributed over the cone's sides.
According to a further embodiment of the invention the fastening dimple extends from a neutral plane and in the vertical direction from the neutral plane and its fastener crest extends past a first plane plate that is parallel to the neutral plane. The first plane is arranged on one side of the heat transfer surface's neutral plane. The heat transfer surface has a pattern. This pattern extends to the side of the heat transfer surface between the neutral plane and the first plane. An effect of the fastener crest extending from the neutral plane and towards the first plane and passing the first plane is that fastener crest in the plate thereby becomes located at a level outside, or above, the pattern in the plate. The fastening dimple is arranged in the plate to remain in the plate's heat transfer surface.
According to a further embodiment of the invention the receiving dimple has a conical section that extends with a section start from the neutral plane and has a first diameter at the neutral plane and in the vertical direction towards and past the first plane and at a distance beyond this plane has an end section with a second diameter that is smaller than the first diameter. The receiving dimple is arranged in the plate to remain the plate's heat transfer surface.
According to a further embodiment of the invention the end section has threshold section that is circular and that extends around the receiving dimple. The threshold section consists of an area with a surface that is shaped like a ring. That surface of the threshold section is located in a plane parallel to the plate's neutral plane. According to the above, the threshold section is arranged at a level outside, or above, the pattern in the plate. Both the pattern and the receiving dimple and the fastening dimple extend in the heat transfer surface from said neutral plane.
According to a further embodiment of the invention an inner conical part in the receiving dimple extends from the threshold section and in a direction towards the neutral plane, which part is configured to face an adjacent plate including said fastening dimple. The shape of the receiving dimple is similar to the shape of a crater. The similarity to a crater is made clear, seen in the neutral plane, in that the receiving dimple extends from the neutral plane and in the direction towards and past a first plane parallel to the neutral plane. The first plane is located at a distance from the neutral plane. The length from the neutral plane to the threshold section, seen in the vertical direction from the neutral plane, is longer than the length over which the pattern that extends on the same side of the plate and that extends in the corresponding vertical direction from the neutral plane to the first plane extends. One effect of this is that the threshold section thereby, as previously mentioned, becomes located above, or beyond, the pattern in the plate. At the threshold section the receiving dimple comprises an inner part having a conical shape. The inner part extends from the threshold section in a direction centrally through the receiving dimple, in a direction towards the neutral plane. Principally on the level of the neutral plane, the inner cone-shaped part's sides have converged whereby a bottom is consequently formed. This bottom faces the first plane in a direction that extends from the neutral plane towards the first plane.
According to a further embodiment of the invention the plates in the stack of plates, which together form the cassettes, consist of one plate type. An effect of this is that when manufacturing heat exchanger plates only one pressing tool is needed. The use of a pressing tool to produce the one plate type consequently results in reduced manufacturing costs.
According to a further embodiment of the invention the type plate is arranged with an A- side and a B-side. In the stack of plates the A-sides of two adjacent plates face each other. Similarly, in the stack of plates the B-sides of two adjacent plates face each other. A first channel is arranged between two adjacent plates' A-sides. A second channel is arranged between two adjacent plates' B-sides. In this way channels through the stack of plates are obtained where the first channel is adjacent to the second channel via an intermediate plate. A medium that flows through the first channel therefore transfers heat with the second channel through the intermediate plate. One plate between two adjacent plates with B-sides facing each other is in a plane parallel to the neutral plane and is rotated by 180 degrees.
According to a further embodiment of the invention the heat transfer surface comprises a pattern that on one side of the plate extends from a neutral plane to a first plane. At a second opposite side the heat transfer surface extends with a pattern that on the second opposite side of the plate extends from the neutral plane according to the above to a second plane. The first and second planes are arranged on each side of the plate's neutral plane and are arranged parallel thereto. The pattern may consist of either dimples or grooves arranged in accordance with known patterns such as a herringbone pattern. Brief description of the drawings
A preferred embodiment of the device according to the invention will now be described in more detail with reference to the attached schematic drawings that show only the details necessary for understanding the invention.
Fig. 1 shows part of a stack of plates with two cross sections A-A and B-B.
Fig. 2 shows the cross sections AA and BB of Fig. 1 in more detail.
Fig. 3 shows a plan view of a receiving dimple.
Detailed description of various embodiments of the invention
Figure 1 shows part of a stack of plates 1 of a heat exchanger. The stack of plates comprises plates 2, 3, which are stacked on one other. Two adjacent plates 2, 3, form a cassette. Two cross sections A-A and B-B are shown through the stack of plates in figure 1. The cross-sections A-A and BB are shown in more detail in Figure 2 and explained in more detail in the related text below.
Figure 2 shows two adjacent cross-sections arranged through the stack of plates 1. The left-hand side of the figure shows the cross section A-A through a portion of the plates 2, 3, including arrangements for the mitigation of shear between two adjacent plates forming a plate cassette 4, 6. The right-hand side of the figure shows the cross-section B-B through some of the plates 2, 3, including arrangements for the mitigation of shear between two adjacent cassettes 4, 6. The thick horizontal line through the stack of plates has been included in the figure in order to clarify said left- and right-hand side of the figure.
Figure 2 shows a first and a second cassette 4, 6, which cassettes include a first plate 2 and a second plate 3. A first channel 5 is arranged in each cassette 4, 6. A second channel 7 is arranged between two adjacent cassettes 4, 6. Each channel 5, 7, is configured to have a medium flow therethrough. Each medium in each adjacent channel 5, 7, exchanges heat with the other via an intermediate plate's 2, 3, heat transfer surface.
Two adjacent plates 2, 3, that form a cassette 4, 6, are arranged with at least one inner fastening dimple 8a and an inner receiving dimple 10a. The inner fastening dimple 8a extends from a neutral plane 0 arranged through the plate 3, which is parallel to the plate's 3 heat transfer surface, in a direction inwards into the cassette 4, 6, and past a plane referred to as the second plane II. This second plane Il is in the stack of plates 1 arranged between two neutral planes 0. In an adjacent plate 2, 3, which adjacent plate 2, 3 is represented by the second plate of the cartridge 4, 6, for the formation of a cassette. In said adjacent plate 2, in the corresponding area as for the inner fastening dimple 8a, an inner receiving dimple 10a is arranged. The fastening dimple 8a includes a fastener crest 9 that is arranged in an area beyond the second plane Il of the fastening dimple's 8a extension from the neutral plane 0.
The inner receiving dimple 10a extends with a section start 12a from the plate's 2 neutral plane 0 towards and past the second plane Il to an end section 14a of the inner receiving dimple 10a. A bottom 11a is arranged centrally in the receiving dimple 10a. The receiving dimple 10a has a shape similar to a crater. The bottom 11a shall therefore be seen as being arranged inside the receiving dimple 10a. The end section 14a has the shape of a circle or ring-shaped surface that extends around receiving dimple 10a.
At the contact surface between two adjacent plates 2, 3 forming a cassette 4, 5, are plates 2, 3, which are configured so that the inner configured fastening dimple 8a with its mounting crest 9a is arranged inside the inner receiving dimple 10a. On fastening between the plates 2, 3, forming a cassette 4, 6, displacement between the plates 2, 3 in a plane parallel to the plates' neutral plane is thereby prevented.
Two adjacent cassettes 4, 6, are arranged in the plate with at least one outer fastening dimple 8b and an outer receiving dimple 10b. The outer fastening dimple 8b extends from a neutral plane 0 arranged through the plate 3, which is parallel to the plate's 3 heat transfer surface, in a direction outwards from the first channel 5 arranged in each cassette 4, 6. The outer fastening dimple 8b has a continued extension past a plane referred to as the first plane I. This first plane I is arranged between two neutral planes 0 in the stack of plates 1. The first and second planes I, II, in the stack of plates 1 are arranged on each side of an intermediate neutral plane 0. In an adjacent plate 2, 3, which adjacent plate 2, 3 is represented by the plate of an adjacent cassette 4, 6, and whereby the second channel 7 is arranged between adjacent cassettes. In said plate 3 of the adjacent cassette, in the corresponding area of the external fastening dimple 8b, an outer receiving dimple 10b is arranged. This fastening dimple 8b includes a fastening crest 9b which is arranged in an area beyond the first plane I of the outer fastening dimple's 8b extension from the neutral plane 0 in the direction towards an adjacent cassette 4, 6.
The outer receiving dimple 10b extends with an outer section start 12b from the plate's 3 neutral plane 0 in a direction towards and past the first plane I to a section end 14b of the outer receiving dimple 10b. An outer bottom 11 b is arranged centrally in the receiving dimple 10b. The receiving dimple 10b has a shape, which in the same way as for the inner receiving dimple 10a, is similar to a crater. The outer bottom 11b must therefore be seen as being arranged inside the outer receiving dimple 10b. The outer end section 14b has the shape of a circle or ring-shaped surface that extends around receiving dimple 10b.
At the contact surface between two plates, 3 and 3, or 2 and 2, of two adjacent cassettes 4, 6, said plates, 3 and 3, or 2 and 2, are so configured that the outer fastening dimple 8b with its fastening crest 9b is arranged inside the external receiving dimple 10b. On fastening the cassettes 4, 6, displacement between the cassettes 4, 6, in the plane parallel to the plate's 2, 3, neutral plane is prevented.
Figure 3 shows a receiving dimple 10a, 10b, seen in plan view arranged in part of a plate 2, 3. The receiving dimple 10a, 14b, is arranged in the heat transfer surface. One reason why one does not want to arrange the receiving dimple, or the fastening dimple in the edge area of the plates 2, 3, is that it can be difficult for two adjacent plates' edge areas to get close enough together when they bear on each other.
The receiving dimple 10a, 10b, according to Fig 3 is provided from the heat transfer surface with a section start 12a, 12b. The receiving dimple thereafter extends in a cone shape to an end section 14a, 14b. This end section consists of a threshold section 16 that is annular. Said section start 12a, 12b, has a first diameter 13 that is greater than a second diameter 15 that the threshold section 16 has. The receiving dimple 10a, 10b, with a conical shape opposite to the first cone shape of said threshold section 16 extends to a bottom 11 of the receiving dimple 10a, 10b.
The invention is not limited to the illustrated embodiment but can be varied and modified within the scope of the following claims, which has partly been described above.
Reference signs:
1. stack of plates
2. first plate
3. second plate
4. first cassette
5. first channel
6. second cassette
7. second channel
8a. inner fastening dimple
8b. outer fastening dimple
9a. inner fastening crest
9b. outer fastening crest
10a. inner receiving dimple
10b. outer receiving dimple
11. bottom
12a. inner section start
12b. outer section start
13. first diameter
14a. inner end section
14b. outer end section
15. second diameter
16. threshold section
17. pattern
A. A-side
B. B-side
0. neutral plane
I. first plane
II. second plane

Claims

Claims:
1. Heat exchanger comprising plates (2, 3) stacked on one another forming a stack of plates (1), in which stack of plates (1) two adjacent plates (2, 3) together are configured to form a plate cassette (4, 6), whereby a first channel (5) is arranged inside each formed plate cassette (4, 6), and a second channel (7) is arranged between two adjacent cassettes (4, 6), whereby in at least one of two adjacent plates (2, 3) a fastening dimple (8a, 8b) that includes a fastening crest (9a, 9b) is arranged, which fastening crest (9a, 9b) faces the adjacent plate (2, 3), whereby in at least one of said two adjacent plates (2, 3) a crater-shaped receiving dimple (10a, 10b) which comprises a bottom (11) is arranged, which bottom (11) faces the adjacent plate (2, 3) that includes the fastening dimple (8a, 8b ), whereby the fastening dimple (8a, 8b) in one plate (2, 3) is configured to be arranged in the crater-shaped receiving dimple (10a, 10b) of the adjacent plate (2, 3) whereby said adjacent plates (2, 3) are thereby fastened relative to each other in a plane parallel to each plate's heat transfer surface.
2. Heat exchanger according to claim 1 , characterized in that the fastening dimple has a cone shape and the cone's peak area is represented by the fastening crest.
3. Heat exchanger according to any of claims 1-2, characterized in that the fastening dimple extends from a neutral plane and in a vertical direction from the neutral plane and its fastening crest extends past a first plane plate that is parallel to the neutral plane.
4. Heat exchanger according to any of claims 1-3, characterized in that the receiving dimple has a conical section that extends with a section start from the neutral plane and which at the neutral plane has a first diameter, and which in a vertical direction from the neutral plane 25 towards and past a first plane and at a distance beyond this plane has an end section with a second diameter that is smaller than the first diameter.
5. Heat exchanger according to claim 4, characterized in the end section is a threshold section that is circular and that extends around the receiving dimple.
6. Heat exchanger according to claim 5, characterized in that an inner conical part extends in the receiving dimple from the threshold section and in a direction towards the neutral plane, which part comprises a bottom that is enclosed by the conical section and which bottom is configured to face an adjacent plate comprising said fastening dimple.
7. Heat exchanger according to any of claims 1-6, characterized in that the plates in the stack of plates which together form the cassettes consist of one plate type.
8. Heat exchanger according to any of claims 1-7, characterized in that the plate type is arranged with an A-side and a B-side.
9. Heat exchanger according to claim 8, characterized in that in the stack of plates the A- sides of two adjacent plates face each other.
10. Heat exchanger according to claims 8 or 9, characterized in that in the stack of plates the B-sides of two adjacent plates face each other.
11. Heat exchanger according to any of claims 1-10, characterized in that the heat transfer surface includes a pattern that on one side of the plate extends from a neutral plane to a first plane.
12. Heat exchanger according to any of claims 1-11 , characterized in that the heat transfer surface includes a pattern that on a second opposite side of the plate extends from a neutral plane to a second plane.
PCT/SE2010/050866 2009-08-04 2010-07-23 Fixation element between plates in a heat exchanger. WO2011016770A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0950578-5 2009-08-04
SE0950578A SE534413C2 (en) 2009-08-04 2009-08-04 Locking device between plates in a heat exchanger.

Publications (1)

Publication Number Publication Date
WO2011016770A1 true WO2011016770A1 (en) 2011-02-10

Family

ID=43544531

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2010/050866 WO2011016770A1 (en) 2009-08-04 2010-07-23 Fixation element between plates in a heat exchanger.

Country Status (2)

Country Link
SE (1) SE534413C2 (en)
WO (1) WO2011016770A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1501629A1 (en) * 1965-06-17 1969-11-06 Chausson Usines Sa Radiator block made of adjacent radiator elements
EP0464875A2 (en) * 1987-11-17 1992-01-08 Ebara Shinwa Ltd. Heat exchanger for cooling tower
SE528275C2 (en) * 2005-02-15 2006-10-10 Alfa Laval Corp Ab Heat transfer plate with control means and heat exchanger comprising such plates

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1501629A1 (en) * 1965-06-17 1969-11-06 Chausson Usines Sa Radiator block made of adjacent radiator elements
EP0464875A2 (en) * 1987-11-17 1992-01-08 Ebara Shinwa Ltd. Heat exchanger for cooling tower
SE528275C2 (en) * 2005-02-15 2006-10-10 Alfa Laval Corp Ab Heat transfer plate with control means and heat exchanger comprising such plates

Also Published As

Publication number Publication date
SE0950578A1 (en) 2011-02-05
SE534413C2 (en) 2011-08-16

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