WO2020174037A1 - Procédé d'assemblage de carter de collecteur pour échangeur de chaleur - Google Patents

Procédé d'assemblage de carter de collecteur pour échangeur de chaleur Download PDF

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Publication number
WO2020174037A1
WO2020174037A1 PCT/EP2020/055115 EP2020055115W WO2020174037A1 WO 2020174037 A1 WO2020174037 A1 WO 2020174037A1 EP 2020055115 W EP2020055115 W EP 2020055115W WO 2020174037 A1 WO2020174037 A1 WO 2020174037A1
Authority
WO
WIPO (PCT)
Prior art keywords
cover
central portion
collector plate
lateral edges
collector
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.)
Ceased
Application number
PCT/EP2020/055115
Other languages
English (en)
Inventor
Olivier MAQUIN
Jérôme MOUGNIER
Yann Pichenot
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Systemes Thermiques SAS
Original Assignee
Valeo Systemes Thermiques SAS
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 Valeo Systemes Thermiques SAS filed Critical Valeo Systemes Thermiques SAS
Priority to EP20707419.6A priority Critical patent/EP3931514A1/fr
Publication of WO2020174037A1 publication Critical patent/WO2020174037A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • F28F9/0219—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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0202—Header boxes having their inner space divided by partitions
    • F28F9/0204—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/12—Fastening; Joining by methods involving deformation of the elements
    • F28F2275/122—Fastening; Joining by methods involving deformation of the elements by crimping, caulking or clinching

Definitions

  • the invention relates to the automobile domain and more specifically to heat exchangers for air conditioning systems in motor vehicles.
  • air conditioning systems in motor vehicles comprise an air conditioning circuit including a compressor that compresses and moves a refrigerant through the circuit, an expansion valve to lower the pressure of the refrigerant, and two heat exchangers, respectively a condenser and an evaporator.
  • Evaporators in the form of several bundles that are superposed on one another and through which the refrigerant flows are known.
  • the heat exchanger In order to move the refrigerant uniformly through the bundles of the heat exchanger, the heat exchanger has one or more collector boxes connected to the bundles.
  • Collector boxes that include a collector plate and a cover mounted on the collector plate, in which said cover and said collector plate define at least two compartments, are known.
  • brazing which involves heating the elements of the exchanger to be fastened together in a kiln at a predetermined melting temperature of the brazing material, said elements are pre- assembled together.
  • Pre- assembly of the cover on the collector plate can be carried out using various techniques.
  • the collector plate and the cover together define at least two compartments, as mentioned above.
  • the two compartments are separated by a central foot acting as a partition between the compartments.
  • the seal between the two compartments is of crucial importance, since an imperfect seal would significantly reduce the performance of the heat exchanger, or even make the heat exchanger unusable.
  • the central foot is fastened to the collector plate, thereby partitioning the compartments.
  • several slots are formed in the collector plate, these slots receiving a pin that projects beyond the cover. The pins thus inserted in the slots enhance the contact between the central foot of the cover and the collector plate, thereby improving the brazing and the seal.
  • a cover is firstly proposed for a collector box of a heat exchanger, the cover being in the form of a profile comprising two lobes that are joined together by a substantially flat central portion, the lobes also having a lateral edge opposite the central portion, the lateral edges being offset by a gap from the central portion in a direction of a transverse axis perpendicular to an axis of extension of said central portion.
  • Such a cover helps to better secure the compartments of the collector box, notably on account of the central foot acting as a sealed partition.
  • the gap between the central portion and the lateral edges enables a pre- assembly of the collector box with a reliable contact between the central portion and the collector plate. More specifically, the gap encourages contact between the central portion and the collector plate rather than contact between the lateral edges and the collector plate. This is notably possible because the contact between the collector plate and the lateral edges can be made by means of a pre assembly operation of the cover and the collector plate, notably by crimping.
  • the elasticity of the cover then enables the central portion of the cover, which is slightly compressed, to be held in contact with the collector plate.
  • such a cover obviates the need to use holes in the collector plate and pins on the cover, which are liable to cause sealing faults following brazing, inter alia.
  • the gap between the central portion and the lateral edges is between 0.2 and 0.5 mm, measured along the transverse axis
  • the gap between the central portion and the lateral edges is approximately 0.3 mm, measured along the transverse axis
  • each lobe together define a central foot, said central foot being deformable
  • the central portion is designed to be fastened to a collector plate of a collector box
  • the central portion is designed to be deformed mechanically to be fastened to the collector plate of a collector box
  • the lateral edges are designed to be fastened to the collector plate
  • the lateral edges are designed to be fastened to the collector plate by crimping.
  • the method includes an intermediate step in which the central portion is fastened to the collector plate, notably by clinching,
  • [25] clinching is performed using an external tool comprising a plurality of clinching supports forming a die and a plurality of punches, each punch being positioned to face one of the clinching supports, the punches having a diameter of approximately 2 mm and/or the clinching supports having a diameter of approximately 3 mm,
  • the collector plate has deformable tabs arranged about the periphery of the lateral zones, the method involving the lateral edges of the cover being fastened to the lateral zones by crimping by folding the deformable tabs such that said deformable tabs come into contact with said lateral edges.
  • Figure 1 is a two-dimensional front view of a cover according to the invention.
  • Figure 2 is a perspective view of a collector box during assembly
  • Figure 3 is another perspective view of Figure 2
  • Figure 4 is a schematic view of a method according to the invention.
  • Figure 5 is a perspective view of a heat exchanger including a collector box according to the invention.
  • FIG. 1 shows a cover 2 of a collector box 1 of a heat exchanger 22.
  • the heat exchanger 22 is an evaporator.
  • the heat exchanger 22 has two heat exchange bundles 23 through which a refrigerant is designed to flow.
  • the bundles 23 are positioned one behind the other such as to be traversed successively by an air flow.
  • the bundles 23 have tubes arranged in parallel to one another. To improve the thermal exchange, the bundles have inserts (not shown) arranged between and in contact with two adjacent tubes in a given bundle.
  • the collector box 1 has a cover 2 and a collector plate 3.
  • the cover 2 is a profile that extends along an axis of extension X and has two lobes 4.
  • the lobes 4 are linked by a central portion 5.
  • the central portion 5 is substantially flat.
  • the central portion 5 and the inner portion 21 of the lobes together define a central foot 6.
  • Each lobe 4 has a lateral edge 7, that is notably flat and continuous, at one of the ends thereof opposite the central portion 5.
  • the collector box 1 therefore has two compartments 8 separated from one another by the central foot 6.
  • Said profile is open at each of the longitudinal ends thereof. Partitions close the profile at each of the longitudinal ends.
  • the collector plate 3 has a plurality of openings 9.
  • the openings 9 are designed to receive the ends of the tubes (not shown) of the heat exchanger.
  • the bundles and the collector boxes are made of aluminium or aluminium alloy components brazed together.
  • the heat exchanger 22 is for example designed to enable the refrigerant to flow in series in the two bundles 23.
  • the refrigerant can flow in a single pass, i.e. in the same direction in each of the tubes of the same bundle.
  • the collector box can be designed, for example using partitions placed in the compartments, such that the refrigerant flows in several passes in one or each of the bundles.
  • the refrigerant flows in two opposing directions between two adjacent passes of the same bundle.
  • the heat exchanger is designed so that the refrigerant passes into one of the compartments then into the other in the flow direction thereof.
  • the collector plate has a central zone 10 positioned between two rows of openings 9.
  • the collector plate 3 has lateral zones 11 on each side of the openings 9, opposite the central zone 10.
  • the central zone 10 of the collector plate 3 is designed to come into contact with the central portion 5 of the cover 2, and the lateral zones 11 are designed to come into contact with the lateral edges 7 of said cover 2.
  • the lateral edges are offset in relation to the central portion.
  • the lateral edges are offset in relation to the central portion by a distance D measured along the axis Z.
  • the distance D is measured between a point located on the central portion designed to come into contact with the central zone and a point located on the lateral edge and designed to come into contact with one of the lateral zones of the collector plate.
  • the distance D is advantageously between 0.2 and 0.5 mm.
  • the distance is preferably approximately 0.3 mm.
  • this distance D advantageously makes it possible to ensure an effective seal of the central foot between the compartments, while on the other hand preventing any significant deformation of a cover during assembly.
  • the method comprises the following successive steps.
  • a first step 12 the cover 2 is attached to the collector plate 3.
  • the central portion 5 of the cover 2 is brought into contact with the central zone 10 of the collector plate 3.
  • the contact is made along the entire length of the cover 2 and of the collector plate 3, which preferably have identical longitudinal dimensions.
  • the central portion 5 is fastened to the central zone 10.
  • the cover 2 is for example fastened to the collector plate 3 by clinching. Clinching is a fastening technique that involves locally deforming the material.
  • Clinching is in this case performed along the central portion 5 at a plurality of different points.
  • the central portion is therefore mechanically deformable.
  • the figures show that the clinching is performed at four different points.
  • the number of points can however vary as a function of the length of the collector plate 3 and of the cover 2.
  • Clinching is performed using an external tool 14.
  • This external tool 14 has clinching supports 15 forming a die and punches 16.
  • a die is an inverted impression of the end of the punch 16.
  • Each punch 16 is positioned to face a clinching support 15.
  • the clinching operation is performed by positioning the central zone 10 of the collector plate 3 and the central portion 5 of the cover 2 between the punches 16 and the clinching supports 15.
  • the punches 16 have a diameter of approximately 2 mm. This enables solid pre-fastening of the cover 2 to the collector plate 3, while minimizing the width of the central foot 6.
  • the central foot 6 is deformable. This enables the cover 2 to be deformed during assembly. This point is described in greater detail below.
  • the clinching supports 15 have a diameter of approximately 3 mm. This enables solid pre- fastening of the cover 2 to the collector plate 3, while enabling the clinching support 15 to be inserted into the width of the central zone 10, i.e. without obstructing the openings 9.
  • lobes 4 are deformed such that the lateral edges are brought into contact with the lateral zones.
  • a fourth step the lateral edges 7 are fastened to the lateral zones 11.
  • the collector plate 3 is provided with deformable tabs 19, in this case crimping teeth, arranged about the periphery of the lateral zones 11 and projecting beyond the collector plate 3.
  • the cover 2 is crimped to the collector plate 3.
  • the deformable tabs 19 are folded towards the cover 2 so that said deformable tabs 19 come into contact with the lateral edges 7 of said cover 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)

Abstract

L'invention porte sur un couvercle (2) pour un carter de collecteur d'un échangeur de chaleur, le couvercle (2) prenant la forme d'un profilé comprenant deux lobes (4) reliés ensemble par une partie centrale sensiblement plate (5), chaque lobe (4) comportant également un bord latéral (7) opposée à la partie centrale (5), les bords latéraux (7) étant décalés de la partie centrale (5) d'un espace (D) dans une direction d'un axe transversal perpendiculaire à un axe d'extension de ladite partie centrale (5).
PCT/EP2020/055115 2019-02-28 2020-02-27 Procédé d'assemblage de carter de collecteur pour échangeur de chaleur Ceased WO2020174037A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20707419.6A EP3931514A1 (fr) 2019-02-28 2020-02-27 Procédé d'assemblage de carter de collecteur pour échangeur de chaleur

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1902118A FR3093358A1 (fr) 2019-02-28 2019-02-28 Procede d’assemblage d’une boîte collectrice pour echangeur de chaleur
FR1902118 2019-02-28

Publications (1)

Publication Number Publication Date
WO2020174037A1 true WO2020174037A1 (fr) 2020-09-03

Family

ID=67185366

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2020/055115 Ceased WO2020174037A1 (fr) 2019-02-28 2020-02-27 Procédé d'assemblage de carter de collecteur pour échangeur de chaleur

Country Status (3)

Country Link
EP (1) EP3931514A1 (fr)
FR (1) FR3093358A1 (fr)
WO (1) WO2020174037A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4576223A (en) * 1982-12-22 1986-03-18 Sueddeutsche Kuehlerfabrik Julius Fr. Behr Gmbh & Co. Kg Heat exchanger and process for its manufacture
GB2399406A (en) * 2003-03-14 2004-09-15 Calsonic Kansei Uk Ltd Automotive heat exchanger headers
JP2004271007A (ja) * 2003-03-06 2004-09-30 Calsonic Kansei Corp 熱交換器のヘッダ構造およびヘッダの製造方法
JP2005345043A (ja) * 2004-06-04 2005-12-15 Calsonic Kansei Corp 熱交換器
KR100737164B1 (ko) * 2006-05-19 2007-07-06 주식회사 두원공조 고압 열교환기의 헤더
JP2008080345A (ja) * 2006-09-26 2008-04-10 Calsonic Kansei Corp 熱交換器用ヘッダタンクのタンク製造方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4576223A (en) * 1982-12-22 1986-03-18 Sueddeutsche Kuehlerfabrik Julius Fr. Behr Gmbh & Co. Kg Heat exchanger and process for its manufacture
JP2004271007A (ja) * 2003-03-06 2004-09-30 Calsonic Kansei Corp 熱交換器のヘッダ構造およびヘッダの製造方法
GB2399406A (en) * 2003-03-14 2004-09-15 Calsonic Kansei Uk Ltd Automotive heat exchanger headers
JP2005345043A (ja) * 2004-06-04 2005-12-15 Calsonic Kansei Corp 熱交換器
KR100737164B1 (ko) * 2006-05-19 2007-07-06 주식회사 두원공조 고압 열교환기의 헤더
JP2008080345A (ja) * 2006-09-26 2008-04-10 Calsonic Kansei Corp 熱交換器用ヘッダタンクのタンク製造方法

Also Published As

Publication number Publication date
EP3931514A1 (fr) 2022-01-05
FR3093358A1 (fr) 2020-09-04

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