EP0421955A1 - Water-tube heat exchanger for a motor vehicle air-conditioning system, having a header with a baffle for dividing the flow - Google Patents

Water-tube heat exchanger for a motor vehicle air-conditioning system, having a header with a baffle for dividing the flow Download PDF

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Publication number
EP0421955A1
EP0421955A1 EP90830429A EP90830429A EP0421955A1 EP 0421955 A1 EP0421955 A1 EP 0421955A1 EP 90830429 A EP90830429 A EP 90830429A EP 90830429 A EP90830429 A EP 90830429A EP 0421955 A1 EP0421955 A1 EP 0421955A1
Authority
EP
European Patent Office
Prior art keywords
baffle
liquid
tube
header
flow
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP90830429A
Other languages
German (de)
French (fr)
Other versions
EP0421955B1 (en
Inventor
Adelio Aimone
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.)
Borletti Climatizzazione SRL
Original Assignee
Borletti Climatizzazione SRL
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Filing date
Publication date
Application filed by Borletti Climatizzazione SRL filed Critical Borletti Climatizzazione SRL
Publication of EP0421955A1 publication Critical patent/EP0421955A1/en
Application granted granted Critical
Publication of EP0421955B1 publication Critical patent/EP0421955B1/en
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
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
    • F28F9/0278—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits in the form of stacked distribution plates or perforated plates arranged over end plates
    • 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
    • F28D1/04—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 tubular conduits
    • F28D1/047—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 tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
    • F28D1/0475—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 tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits having a single U-bend
    • 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
    • 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
    • F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-elements
    • F28F9/0224—Header boxes formed by sealing end plates into covers
    • F28F9/0226—Header boxes formed by sealing end plates into covers with resilient gaskets

Definitions

  • the present invention relates to a liquid-gas heat exchanger with water tubes, particularly for a motor-vehicle air-conditioning system, of the type including a header with a tube plate, a cover and a baffle for dividing the flow.
  • one side of the flow-dividing baffle is connected to the convex cover of the header and the other side is connected to the tube plate with the interposition of a gasket. It is thus possible to form a water-tube heat exchanger in which the water passes tube-side twice. If one wishes to increase the number of times the liquid passes tube-side, and hence the efficiency of the exchanger, it is necessary to use several flow-dividing baffles which complicate the manufacture of the exchanger and can create sealing problems between the baffles and the tube plate.
  • the object of the present invention is to provide an exchanger of the type specified at the beginning of the description, which allows the liquid to pass tube-side several times without complications in the structure of the exchanger.
  • this object is achieved by virtue of the fact that the flow-dividing baffle is interposed sealingly between the cover and the tube plate and has liquid-channelling means for causing the liquid to pass tube-side several times.
  • the baffle has a flat base portion facing the tube plate and a flow-dividing portion substantially perpendicular to the base portion and having a free edge connectible to the cover of the header by pressure or by ultrasonic welding.
  • an exchanger with water tubes can be formed with three or more "rows" (that is, with sets of finned tubes arranged substantially in three different parallel planes) and a flow-divider, without complications in the assembly of the exchanger, in the arrangement of the baffles or in the positioning of the liquid-inlet and -outlet connectors.
  • a liquid-gas heat exchanger with three rows of water tubes suitable for installation in a motor-vehicle air-conditioning system is generally indicated 10.
  • the exchanger 10 has a finned matrix 10a composed of finned U-shaped tubes arranged between a header 12 and a tube-support frame 14.
  • the header 12 includes a convex cover 16 of polymeric material which has a recessed portion 17 formed with two lateral connectors 16a and 16b for respective connection to inlet and outlet tubes for the liquid, a metal tube plate 18 with a plurality of holes 18a for the passage of the tubes T, and a baffle 20 of polymeric material whose characteristics will become clear from the following description ( Figure 2).
  • the baffle 20 has a flat base portion 20a which faces the tube plate 18 with the interposition of a flat gasket 22 of elastomeric material having a plurality of holes 22a for the passage of the ends of the tubes T, and a substantially L-shaped, flow-dividing portion 20b perpendicular to the base portion 20a.
  • the latter has two series of through-holes 23 and 25 respectively, arranged on opposite sides of the portion 20b of the baffle 20, as well as a plurality of elongate recessed portions 27 with substantially channel-shaped cross-sections arranged in correspondence with adjacent pairs of tubes T in an arrangement which, as shown clearly in Figures 2 and 3, forces the liquid circulating in the tubes in the central plane of the matrix 10a to be conveyed either into other tubes in the central plane (the recesses indicated A in Figures 3 and 5) or into tubes in planes parallel to the central plane of the matrix (the recesses indicated B in Figures 3 and 5).
  • the portion 20b of the ale 20 has a free edge E which is connected (by pressure or by ultrasonic welding), during the assembly of the exchanger, to the corresponding edge E′ of a central baffle plate 30 formed on the base wall 32 of the cover 16 of the header 12 ( Figure 8).
  • edge E of the portion 20b of the baffle 20 is V-shaped and corresponds in shape to a V-shaped recess formed in the edge E′ of the baffle plate 30.
  • the edge of the metal tube plate 18, indicated 18b is folded over a shaped edge 16c of the cover 16 with the interpositon of the edge 22b of the flat gasket 22.
  • the latter is therefore used both to effect a seal between the cover 16 and the tube plate 18 and to effect a seal between the baffle 20 and the tube plate 18 in order to prevent the leakage of liquid between its various passages tube-side ( Figures 2 and 8).
  • the fluid admitted by the connector 16a is forced by the portion 20b of the baffle 20 to pass through the first series of holes 23 and to flow along a first set of U-shaped tubes of the matrix 10a and back again.
  • the liquid is returned thereto by the U-shaped recesses 27 and thus passes twice more through the matrix of finned tubes 10a.
  • the liquid returning from its fourth and last passage through the matrix of tubes flows through the second series of holes 25 and is conveyed to the outlet connector 16b of the exchanger 10 ( Figure 2).

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Laminated Bodies (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

A water-tube radiator for a motor-vehicle air-conditioning system includes a header with a cover (16) of polymeric material welded ultrasonically to a flow-dividing baffle (20) with a flat base portion (20a) which faces the tube plate (is) with the interposition of a flat gasket (22) of elastomeric material. The base portion (20a) of the baffle (20) has a plurality of U-shaped connectors (27) arranged to cause the liquid to pass tube-side more than twice without the need for more than one flow-dividing baffle.

Description

  • The present invention relates to a liquid-gas heat exchanger with water tubes, particularly for a motor-vehicle air-conditioning system, of the type including a header with a tube plate, a cover and a baffle for dividing the flow.
  • In current solutions, one side of the flow-dividing baffle is connected to the convex cover of the header and the other side is connected to the tube plate with the interposition of a gasket. It is thus possible to form a water-tube heat exchanger in which the water passes tube-side twice. If one wishes to increase the number of times the liquid passes tube-side, and hence the efficiency of the exchanger, it is necessary to use several flow-dividing baffles which complicate the manufacture of the exchanger and can create sealing problems between the baffles and the tube plate.
  • The object of the present invention is to provide an exchanger of the type specified at the beginning of the description, which allows the liquid to pass tube-side several times without complications in the structure of the exchanger.
  • According to the invention, this object is achieved by virtue of the fact that the flow-dividing baffle is interposed sealingly between the cover and the tube plate and has liquid-channelling means for causing the liquid to pass tube-side several times.
  • Preferably, the baffle has a flat base portion facing the tube plate and a flow-dividing portion substantially perpendicular to the base portion and having a free edge connectible to the cover of the header by pressure or by ultrasonic welding.
  • By virtue of these characteristics, an exchanger with water tubes can be formed with three or more "rows" (that is, with sets of finned tubes arranged substantially in three different parallel planes) and a flow-divider, without complications in the assembly of the exchanger, in the arrangement of the baffles or in the positioning of the liquid-inlet and -outlet connectors.
  • Further advantages and characteristics of the exchanger according to the invention will become clear from the detailed description which follows, purely by way of non-limiting example, with reference to the appended drawings, in which:
    • Figure 1 is a perspective view of an exchanger according to the invention,
    • Figure 2 is an exploded perspective view of the exchanger of Figure 1,
    • Figure 3 is a view of a detail of Figure 2 on an enlarged scale,
    • Figure 4 is a section taken on the line IV-IV of Figure 1,
    • Figure 5 is a section taken on the line V-V of Figure 1,
    • Figure 6 is a section taken on the line VI-VI of Figure 1,
    • Figure 7 is a section taken on the line VII-VII of Figure 1,
    • Figure 8 is a section taken on the line VIII-VIII of Figure 1, and
    • Figure 9 is a section taken on the line IX-IX of Figure 1.
  • With reference to the drawings (Figure 1), a liquid-gas heat exchanger with three rows of water tubes suitable for installation in a motor-vehicle air-conditioning system is generally indicated 10. The exchanger 10 has a finned matrix 10a composed of finned U-shaped tubes arranged between a header 12 and a tube-support frame 14.
  • The header 12 includes a convex cover 16 of polymeric material which has a recessed portion 17 formed with two lateral connectors 16a and 16b for respective connection to inlet and outlet tubes for the liquid, a metal tube plate 18 with a plurality of holes 18a for the passage of the tubes T, and a baffle 20 of polymeric material whose characteristics will become clear from the following description (Figure 2).
  • The baffle 20 has a flat base portion 20a which faces the tube plate 18 with the interposition of a flat gasket 22 of elastomeric material having a plurality of holes 22a for the passage of the ends of the tubes T, and a substantially L-shaped, flow-dividing portion 20b perpendicular to the base portion 20a. The latter has two series of through- holes 23 and 25 respectively, arranged on opposite sides of the portion 20b of the baffle 20, as well as a plurality of elongate recessed portions 27 with substantially channel-shaped cross-sections arranged in correspondence with adjacent pairs of tubes T in an arrangement which, as shown clearly in Figures 2 and 3, forces the liquid circulating in the tubes in the central plane of the matrix 10a to be conveyed either into other tubes in the central plane (the recesses indicated A in Figures 3 and 5) or into tubes in planes parallel to the central plane of the matrix (the recesses indicated B in Figures 3 and 5).
  • The portion 20b of the ale 20 has a free edge E which is connected (by pressure or by ultrasonic welding), during the assembly of the exchanger, to the corresponding edge E′ of a central baffle plate 30 formed on the base wall 32 of the cover 16 of the header 12 (Figure 8).
  • As can clearly be seen in Figures 8 and 9, the edge E of the portion 20b of the baffle 20 is V-shaped and corresponds in shape to a V-shaped recess formed in the edge E′ of the baffle plate 30.
  • During the assembly of the exchanger, the edge of the metal tube plate 18, indicated 18b, is folded over a shaped edge 16c of the cover 16 with the interpositon of the edge 22b of the flat gasket 22. The latter is therefore used both to effect a seal between the cover 16 and the tube plate 18 and to effect a seal between the baffle 20 and the tube plate 18 in order to prevent the leakage of liquid between its various passages tube-side (Figures 2 and 8).
  • When the exchanger 10 is in use, the fluid admitted by the connector 16a is forced by the portion 20b of the baffle 20 to pass through the first series of holes 23 and to flow along a first set of U-shaped tubes of the matrix 10a and back again. After its first two passages through the matrix 10a, the liquid is returned thereto by the U-shaped recesses 27 and thus passes twice more through the matrix of finned tubes 10a. The liquid returning from its fourth and last passage through the matrix of tubes flows through the second series of holes 25 and is conveyed to the outlet connector 16b of the exchanger 10 (Figure 2).
  • Although the embodiment described relates to an exchanger with three "rows", that is, with finned tubes arranged in three parallel planes, the solution according to the present invention may also be applied to different exchangers to provide the same advantages.

Claims (6)

1. A heat exchanger, particularly a liquid-gas or a liquid-liquid heat exchanger with tubes for a motor-vehicle air-conditioning or cooling system, of the type including at least one header (12) with a tube plate (18), a cover (16) and a baffle (20) for dividing the flow, characterized in that the baffle (20) is interposed sealingly between the cover (16) and the tube plate (18) and has liquid-channelling means (27, A, B) for causing the liquid to pass tube-side several times.
2. An exchanger according to Claim 1, characterized in that the baffle (20) has a flat base portion (20a) which faces the tube plate (18) and a flow-dividing portion (20b) substantially perpendicular to the base portion (20a) and having a free edge (E) for connection to the cover (E′, 30, 32, 16) of the header (12).
3. An exchanger according to Claim 2, of the type in which the liquid passes through the tube side four or more times, characterized in that the flat base portion (20a) of the baffle (20) has a first series of holes (23) coaxial with the tubes (T) which admit the liquid to the tube matrix (10a) and a second series of holes (25) coaxial with the tubes (T) which discharge the liquid from the tube matrix (20a), and a plurality of U-shaped connectors (27) integral with the baffle (20).
4. An exchanger according to Claim 3, characterized in that a flat sealing gasket (22) of elastomeric material is interposed between the flat base portion (20a) and the tube plate (18) and has a plurality of holes (22a) for the passage of the tubes (T) of the tube matrix (10a).
5. An exchanger according to any one of Claims 2-4, characterized in that the cover (16) of the header (12) has a flat base portion (32) with an integral baffle plate (30) substantially perpendicular to the base portion (32) and having a free edge (E′) which is adapted to be connected end-to-end to the free edge (E) of the flow-dividing portion (20b) of the baffle (20).
6. An exchanger according to any one of the preceding claims, characterized in that it has only one header (12) and one matrix of U-shaped tubes (T).
EP90830429A 1989-10-06 1990-10-02 Water-tube heat exchanger for a motor vehicle air-conditioning system, having a header with a baffle for dividing the flow Expired - Lifetime EP0421955B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT6785689 1989-10-06
IT06785689A IT1237601B (en) 1989-10-06 1989-10-06 WATER PIPE HEAT EXCHANGER FOR AIR CONDITIONING SYSTEMS FOR VEHICLES WITH MANIFOLD EQUIPPED WITH SEVEN FLOW DIVIDER.

Publications (2)

Publication Number Publication Date
EP0421955A1 true EP0421955A1 (en) 1991-04-10
EP0421955B1 EP0421955B1 (en) 1994-03-16

Family

ID=11305827

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90830429A Expired - Lifetime EP0421955B1 (en) 1989-10-06 1990-10-02 Water-tube heat exchanger for a motor vehicle air-conditioning system, having a header with a baffle for dividing the flow

Country Status (4)

Country Link
EP (1) EP0421955B1 (en)
DE (1) DE69007410T2 (en)
ES (1) ES2050415T3 (en)
IT (1) IT1237601B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0518224A1 (en) * 1991-06-11 1992-12-16 Behr GmbH & Co. Header box for a heat-exchanger
EP0563471A1 (en) * 1992-03-31 1993-10-06 Modine Manufacturing Company Evaporator
EP0978702A1 (en) * 1998-07-09 2000-02-09 Sierra S.p.A. Device for a heat-exchange terminal with a finned assembly
ITUD20110191A1 (en) * 2011-11-25 2013-05-26 Bruno Pilosio PERFECT WING HEAT EXCHANGER AND PRODUCTION PROCEDURE

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2300881A1 (en) * 1972-02-24 1973-09-06 Modine Mfg Co HEAT EXCHANGER
US4114397A (en) * 1975-11-21 1978-09-19 Hitachi, Ltd. Evaporator
FR2390692A1 (en) * 1977-05-13 1978-12-08 Mangeol Charles Domestic hot water supply heat exchanger - has pipes arranged in radial lines interconnected by cups hollowed in outer plates, and uses fluid from central heating circuit
FR2509447A1 (en) * 1981-07-08 1983-01-14 Sueddeutsche Kuehler Behr EVAPORATOR ESPECIALLY FOR AIR CONDITIONING EQUIPMENT OF VEHICLES
FR2573190A1 (en) * 1984-11-12 1986-05-16 Chausson Usines Sa Multi-tube evaporator with attached distributing box
DE3733866A1 (en) * 1987-10-07 1989-04-27 Sueddeutsche Kuehler Behr Heat exchanger
EP0328414A2 (en) * 1988-02-12 1989-08-16 Acr Heat Transfer Manufacturing Limited Heat exchanger

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2300881A1 (en) * 1972-02-24 1973-09-06 Modine Mfg Co HEAT EXCHANGER
US4114397A (en) * 1975-11-21 1978-09-19 Hitachi, Ltd. Evaporator
FR2390692A1 (en) * 1977-05-13 1978-12-08 Mangeol Charles Domestic hot water supply heat exchanger - has pipes arranged in radial lines interconnected by cups hollowed in outer plates, and uses fluid from central heating circuit
FR2509447A1 (en) * 1981-07-08 1983-01-14 Sueddeutsche Kuehler Behr EVAPORATOR ESPECIALLY FOR AIR CONDITIONING EQUIPMENT OF VEHICLES
FR2573190A1 (en) * 1984-11-12 1986-05-16 Chausson Usines Sa Multi-tube evaporator with attached distributing box
DE3733866A1 (en) * 1987-10-07 1989-04-27 Sueddeutsche Kuehler Behr Heat exchanger
EP0328414A2 (en) * 1988-02-12 1989-08-16 Acr Heat Transfer Manufacturing Limited Heat exchanger

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0518224A1 (en) * 1991-06-11 1992-12-16 Behr GmbH & Co. Header box for a heat-exchanger
EP0563471A1 (en) * 1992-03-31 1993-10-06 Modine Manufacturing Company Evaporator
EP0978702A1 (en) * 1998-07-09 2000-02-09 Sierra S.p.A. Device for a heat-exchange terminal with a finned assembly
ITUD20110191A1 (en) * 2011-11-25 2013-05-26 Bruno Pilosio PERFECT WING HEAT EXCHANGER AND PRODUCTION PROCEDURE
WO2013076567A2 (en) 2011-11-25 2013-05-30 Pilosio Bruno Perfected heat exchanger and production method

Also Published As

Publication number Publication date
DE69007410D1 (en) 1994-04-21
IT8967856A0 (en) 1989-10-06
IT8967856A1 (en) 1991-04-06
ES2050415T3 (en) 1994-05-16
IT1237601B (en) 1993-06-08
DE69007410T2 (en) 1994-07-07
EP0421955B1 (en) 1994-03-16

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