Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
  • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
  • F28D9/0062—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 spaced plates with inserted elements
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F2250/00—Arrangements for modifying the flow of the heat exchange media, e.g. flow guiding means; Particular flow patterns
  • F28F2250/10—Particular pattern of flow of the heat exchange media
  • F28F2250/104—Particular pattern of flow of the heat exchange media with parallel flow

Definitions

• Plate bundle for a heat exchanger and heat exchanger comprising such a plate bundle.
• the present invention relates to a bundle of plates for a heat exchanger allowing so much to carry out a heat exchange between two fluids circulating against the current.
• the present invention also relates to a heat exchanger provided with such a bundle of plates.
• the first type of heat exchanger comprises a bundle of "U" shaped tubes or a bundle of straight tubes, in which a fluid circulates.
• the second type of heat exchanger comprises a bundle of plates arranged contiguously and parallel to one another.
• the plates made of thin sheets most often made of stainless steel, have edges with a smooth surface and a central part provided with corrugations by which they are in contact with one another and by which they delimit a double circuit of circulation of two independent and counter-current fluids from one end to the other of the plate bundle.
• the assembly of the plates to form the bundle is carried out as follows.
• the plates are stacked by inserting, between the longitudinal edges of each plate, a tab forming a spacer.
• Each weld wall is produced by an ascending succession of horizontal welding passes.
• the object of the invention is therefore to avoid the drawbacks mentioned above by proposing a bundle of plates which is simpler and less costly to produce and whose sealing test is facilitated.
• the subject of the invention is therefore a bundle of plates for a heat exchanger, of the type comprising a stack of metal heat exchange plates and parallel to each other having edges with a smooth surface and a central part provided with undulations. to form with the associated plates a double circulation circuit of two independent and counter-current fluids, characterized in that each heat exchange plate comprises, at its longitudinal edges, a member for connecting to the two adjacent plates, at level of its end edges, a connecting member with an adjacent plate to form an alternating superposition of open or closed ends and, at its angles, a connecting member of the heat exchange plates and connecting members together.
• Each connecting member of the longitudinal edges of the heat exchange plates is formed by a T-shaped profile, the core of which is fixed to the longitudinal edge of the corresponding heat exchange plate by means of a cord of continuous and watertight welding and each of the wings of which is fixed to a wing of the adjacent T-shaped profile by means of a continuous and watertight weld bead to form a solid wall,
• Each connecting member of the longitudinal edges of the heat exchange plates is formed by a profile comprising a plate and two parallel wings intended to be fixed each by means of a continuous and sealed weld bead on the longitudinal edge of a corresponding heat exchange plate, the edges of each profile plate being fixed to the edge of the adjacent profile plate by means of a continuous and sealed weld bead to form a solid wall, - each edge connection member of the heat exchange plates is formed by an L-shaped profile, one branch of which is fixed to the end edge of the corresponding heat exchange plate by means of a continuous weld bead and waterproof and the other branch of which is fixed to one of the branches of the adjacent L-shaped profile by means of a continuous and waterproof weld bead,
• each connecting member of the connecting members together comprises, on the one hand, a vertical plate in the form of a square and, on the other hand, two horizontal and parallel plates arranged on the internal faces of the two branches of the vertical plate in the form of a square,
• each branch of the square plate is fixed by welding respec ⁇ tively on the free ends of the T-shaped profiles and adjacent L-shaped profiles and the free edge of each horizontal plate is fixed by welding on the edges of the adjacent heat exchange plates, - the bundle comprises at its end edges at least one element for connection to fluid inlet and outlet manifolds,
• each stiffening element is formed by a juxtaposition of T-shaped parts, the core of which is fixed by welding to the end edge of the corresponding heat exchange plate and each of the wings of which is fixed by welding to a wing of the adjacent part, the lateral edges of the T-shaped parts of each stiffening element being connected by welding to the free edges of the adjacent L-shaped profiles.
• FIG. 1 is a schematic perspective view of part of a bundle of plates according to the invention
• FIG. 2 is a partial perspective view of the bundle of plates according to the invention showing the connecting members at the longitudinal edges of the heat exchange plates and the connection members at the angles of said heat exchange plates,
• FIG. 3 is a partial perspective view of the bundle of plates according to the invention, showing the connecting members at the end edges of the heat exchange plates,
• Fig. 4 is a perspective view of a corner connection member
• FIG. 5 is a partial perspective view of the bundle of plates according to the invention showing an element for connection to fluid inlet and outlet manifolds,
• FIG. 6 is a perspective view of a part of a connecting element.
• Fig. 1 there is partially shown a bundle of plates of a heat exchanger designated as a whole by the reference 1 and intended to carry out a heat exchange between two fluids circulating against the current.
• the bundle of plates 1 is composed of a stack of metallic plates 2 of small thickness and parallel to one another.
• Each plate 2 consists of a thin sheet, most often made of stainless steel or any other sufficiently ductile material.
• Each plate 2 has longitudinal and transverse edges, respectively 2a and 2b, with a smooth surface and a central part 2c provided with corrugations.
• the plates 2 define intervals between them.
• One interval out of two forms a first longitudinal circuit for a first fluid A and the other intervals form a second longitudinal circuit b for a second fluid B, said circuits extending over the entire length of the bundle of plates 1.
• the circuits a and b are independent and against the current.
• Each heat exchange plate 2 comprises:
• the bundle of plates 1 also comprises at its end edges 2b, at least one connection element 40 to collectors 9 for inlet and outlet of fluids. These collectors 9 are shown in phantom in Fig.l so as not to overload the drawing.
• each connecting member 10 of the longitudinal edges 2a of the heat exchange plates 2 is formed by a T-shaped profile comprising a core 11 and two wings 12 perpendicular to said core 11.
• the thickness of the core 11 is substantially equal to the thickness of a heat exchange plate 2 and the height of each wing 12 is substantially equal to a half interval separating two heat exchange plates 2.
• each profile 10 is fixed to the longitudinal edge 2a of the corresponding heat exchange plate 2 by means of a continuous and sealed weld bead 13 and each of the wings 12 of a profile 10 is fixed to a wing 12 of the profile 10 adjacent by means of a continuous and sealed weld bead 14.
• each connecting member 10 of the longitudinal edges 2a of the heat exchange plates 2 can be formed by a profile forming two juxtaposed T and comprising a plate and two parallel wings whose interval corresponds to an interval between two heat exchange plates 2.
• Each wing is intended to be fixed by means of a continuous and sealed weld bead on the longitudinal edge 2a of a corresponding heat exchange plate 2.
• the edges of each profile plate are fixed to the edge of the adjacent profile plate by means of a continuous and sealed weld bead to also form a solid wall.
• This embodiment makes it possible to reduce the number of weld beads connecting the various elements together.
• each connecting member 20 of the end edges 2b of the heat exchange plates 2 is formed by an L-shaped profile comprising two perpendicular branches, respectively 21 and 22.
• Each branch 21 has a thickness substantially the thickness of a heat exchange plate 2 and each branch 22 at a height substantially equal to a half-interval separating two heat exchange plates 2.
• each branch 21 is fixed to the end edge 2b of the corresponding heat exchange plate 2 by means of a continuous and sealed weld bead 23.
• each branch 22 of a profile 20 is fixed to one of the branches 22 of the adjacent profile 20 by means of a continuous and sealed weld bead 24.
• one interval out of two is closed by the L-shaped profiles 20 thus making it possible to produce, at each end of the bundle of plates 1, an alternating superposition of open ends 3 and closed 4.
• each connecting member 30 of the heat exchange plates 2 and the connecting members 10 and 20 between them comprises, on the one hand, a vertical plate 31 in the form of a square and, on the other hand, two plates 32 and 33 horizontal and parallel, arranged on the internal face of the two branches of the vertical plate 31 in the form of a square.
• the vertical plate 31 covers an interval of one of the circuits and an upper half-interval and a lower half-interval of the other circuit.
• each branch of the vertical plate 31 in the form of a square are joined and fixed by welding, respectively on the free ends of the adjacent T-shaped profiles 10 and on the free ends of the adjacent L-shaped profiles 20 and the free edges of each horizontal plate 32 and 33 are fixed by welding to the edges of the adjacent heat exchange plates 2.
• the longitudinal edges of the connecting members 30 thus superimposed are welded together to form a surface of continuous angle.
• the bundle of plates 1 comprises, at its end edges 2b, at least a connecting element 40 to the collectors 9.
• the connecting element 40 is formed by a juxtaposition of parts 41 in the form of a T comprising a core 42 and two wings, respectively 43 and 44.
• the core 42 has a thickness substantially equal to the thickness of a heat exchange plate 2 and each wing 43 and 44 has a height substantially at a half-interval separating two heat exchange plates 2.
• each part 41 is fixed by welding to the edge of the corresponding heat exchange plate 2 and each of the wings 43 and 44 is fixed by welding to a wing 43 or 44 of the adjacent part 41.
• the lateral edges of the parts 41 are welded to the free edges of the adjacent L-shaped profiles 20.
• the bundle of plates 1 thus formed is placed in a sealed enclosure, not shown, resistant to internal pressure to constitute a heat exchanger.
• the assembly of such a bundle of plates 1 is carried out by equipping each heat exchange plate 2 with welding, before the formation of the stack, on the one hand, T-shaped profiles 10 on the longitudinal edges 2a heat exchange plates 2 and, on the other hand, L-shaped profiles 20 on the end edges 2b of said heat exchange plates 2.
• the sections 10 and 20 are produced so as to obtain the interval required by the undulations of the heat exchange plates 2 and to allow connection to the plate 2 by manual or automatic butt welding.
• connection members 30 and connection elements 40 to the collectors 9.
• the heat exchange plates 2 provided with these various elements are then stacked and the tightness of each circuit is obtained by the butt welding of these elements which are opposite.

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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)

Applications Claiming Priority (3)

Publications (1)

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ID=9482699

Family Applications (1)

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• 1995
  • 1995-09-19 FR FR9510974A patent/FR2738906B1/fr not_active Expired - Lifetime
• 1996
  • 1996-07-26 EP EP96927098A patent/EP0851998A1/de not_active Withdrawn
  • 1996-07-26 JP JP51242597A patent/JP3744544B2/ja not_active Expired - Lifetime
  • 1996-07-26 WO PCT/FR1996/001191 patent/WO1997011329A1/fr not_active Application Discontinuation

Non-Patent Citations (1)

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