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EP3255368A1 - Échangeur de chaleur, en particulier un radiateur à gaz ou un condenseur destiné à un véhicule - Google Patents

Échangeur de chaleur, en particulier un radiateur à gaz ou un condenseur destiné à un véhicule Download PDF

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Publication number
EP3255368A1
EP3255368A1 EP16173746.5A EP16173746A EP3255368A1 EP 3255368 A1 EP3255368 A1 EP 3255368A1 EP 16173746 A EP16173746 A EP 16173746A EP 3255368 A1 EP3255368 A1 EP 3255368A1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
width
side walls
ribbed
flattened
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.)
Withdrawn
Application number
EP16173746.5A
Other languages
German (de)
English (en)
Inventor
Grzegorz Romanski
Dawid Szostek
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 EP16173746.5A priority Critical patent/EP3255368A1/fr
Publication of EP3255368A1 publication Critical patent/EP3255368A1/fr
Withdrawn legal-status Critical Current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
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/126—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element consisting of zig-zag shaped fins
    • F28F1/128—Fins with openings, e.g. louvered fins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F1/022—Tubular elements of cross-section which is non-circular with multiple channels

Definitions

  • the present invention relates to a heat exchanger, especially a gas radiator or a condenser for a car, comprising manifolds arranged on both sides of the heat exchanger and plurality stacked parallel and spaced relative to each other flattened tubes, the ends of which are arranged in the manifolds.
  • the flattened tubes are elongated in the transverse direction and have rounded outer side walls.
  • the heat exchanger further comprises ribbed separators in the form of wavy curved ribs having flat outer side walls. The ribbed separators are arranged between the flattened tubes.
  • heat exchangers such as condensers or radiators for car made up of plurality parallel arranged flat tubes between which the separators are arranged in the form of wavy curved ribs.
  • the pipe ends are connected to two manifolds in which the refrigerant is gathered.
  • the width of the ribs is equal to the width of the flat tubes, which causes that the assembly of the radiator elements is simplified. It is also known an arrangement wherein the width of the flat tube is slightly greater than the ribbed separator.
  • the inventors proposed a heat exchanger whose design does not have the prior art disadvantages, because the ribs are symmetrically wider relative to the flat tube. This results in improving of the mechanical strength of a heat exchanger because the tubes are not exposed to direct impact of stones or other objects.
  • the object of the invention is to improve of the heat exchanger structure, which would be still more efficient and more protected against impact of stones and corrosion.
  • the ribbed separators formed of the wavy curved ribs are provided with two-sided protrusion, which is caused by suggestion of using the ribbed separator having greater width in relation to the width of the flattened tube.
  • the ribbed separator is symmetrically wider on both sides in relation to the flattened tube. Thanks to said two-sided protrusions, higher heat exchange efficiency is provided due to increased heat transfer surface. Furthermore, there is provided a still better protection against impact of stones and still better corrosion protection with respect to known solutions. This is very important because typically a condenser or a radiator for R744 gas is placed in the vehicle in the first row i.e.
  • a first heat exchanger of a cooling module consisted of several sequentially arranged heat exchangers.
  • the chemical composition of the cooling fins is selected so that the galvanic corrosion potential caused privileged corrosion of ribs rather than tubes, and therefore the larger the surface of the ribs the higher corrosion resistance.
  • the increased surface area of ribs improves heat transfer between the air (cooling medium) and ribs.
  • a symmetry of ribs does not complicate the manufacturing process and does not cause increasing of the manufacturing cost of a heat exchanger.
  • the object of the invention is achieved by a heat exchanger which is characterized in that the width of the ribbed separator is greater than the width of the flattened tube in the range from 0% to 20%.
  • the flattened tube is positioned symmetrically with respect to the ribbed separator across the width of said separator and forms equal distances the ribbed separator projects on both sides beyond the outer surface of the side walls of the flattened tube.
  • the width of the ribbed separator is measured between its outer flat side walls in the transverse direction, while the width of the flattened tube is measured in the same transverse direction and between the outer surfaces of its side walls.
  • the tube is produced by extrusion process, and preferably it is formed by winding.
  • the distance the ribbed separator projects beyond the outer surfaces of the side walls of the flattened tube is in the range from 10 mm to 22 mm.
  • the heat exchanger 1 comprises manifolds (not shown) which are arranged on both of its sides.
  • the heat exchanger further comprises plurality flattened tubes 2 arranged in parallel and spaced relative to each other, the ends of which are placed in the manifolds (not shown).
  • the flattened tubes 2 are elongated in the transverse direction X (indicated in Fig. 1 by the arrow).
  • the flattened tubes 2 have rounded outer side walls 2a, which are connected to each other with parallel flat upper and lower walls.
  • the transverse direction X is determined by the planar top and bottom walls.
  • the heat exchanger 1 further comprises ribbed separators 3 formed of wavy curved ribs, wherein the ribbed separators 3 have outer flat side walls 3a. As illustrated in Fig. 1 the ribbed separators 3 are arranged between the flattened tubes 2. It should be noted that for clarity the Fig. 1 shows a fragment of the heat exchanger in the form of a block comprising several flat tubes and ribbed separators arranged in between.
  • Fig. 2 shows the mutual positioning of the flattened tube 2 of the heat exchanger in relation to the ribbed separator 3.
  • the width of the ribbed separator 3, marked by B value in Fig. 2 is measured between its outer flat side walls 3a and in the transverse direction X.
  • the width of the flattened tube 2, marked in Fig. 2 by A value is measured in the same transverse direction X and between the outer surfaces of its side walls 2a.
  • the B width of the ribbed separator 3 is larger than the A width of the flattened tube 2 in the range of 0% to 20%.
  • the flattened tube 2 is positioned symmetrically with respect to the ribbed separator 3 across the width of the ribbed separator 3 and forms equal distances the ribbed separator 3 projects on both sides beyond the outer surface of the side walls 2a of the flattened tube 2.
  • the distance the ribbed separator 3 projects beyond the outer surfaces of the side walls 2a of the flattened tube 2 is in the range from 10 mm to 22 mm.
  • the individual blocks of the heat exchanger, especially gas radiator or condenser for the car are carried out in a known manner by forming firstly flattened tubes preferably from a brass sheet, which are then trimmed by cutting into lengths depending on the radiator type and that are subjected to well known protective treatment against corrosion.
  • the ribbed separators are formed of wavy curved ribs.
  • the ribbed strips are stacked one above the other and separated by flattened tubes.
  • the flattened tubes are produced in the process of press forming or by corrugation.
  • the protruding ends of the flattened tubes are mounted in the two heads disposed on both sides of the radiator.
  • the heads are provided with manifolds for the cooling agent.
  • the flattened tubes are mounted symmetrically across the width of the ribbed separator to ensure equal distances the ribbed separator projects on both sides beyond the outer surface of the side walls of the flattened tube.
  • the tests were carried for different B widths of a ribbed separator with respect to the A width of the flattened tube 2.
  • the most preferred result was obtained for improvement of the heat exchanger performance and protection against impacts of stones, and it was found that the B width of the ribbed separators have to be greater than the A width of the flattened tube 2 in the range of 0% to 20%.
  • the best possible result meeting the expectations was obtained for the flattened tube having width 12 mm and ribbed separator having width 14 mm.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP16173746.5A 2016-06-09 2016-06-09 Échangeur de chaleur, en particulier un radiateur à gaz ou un condenseur destiné à un véhicule Withdrawn EP3255368A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP16173746.5A EP3255368A1 (fr) 2016-06-09 2016-06-09 Échangeur de chaleur, en particulier un radiateur à gaz ou un condenseur destiné à un véhicule

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16173746.5A EP3255368A1 (fr) 2016-06-09 2016-06-09 Échangeur de chaleur, en particulier un radiateur à gaz ou un condenseur destiné à un véhicule

Publications (1)

Publication Number Publication Date
EP3255368A1 true EP3255368A1 (fr) 2017-12-13

Family

ID=56134148

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16173746.5A Withdrawn EP3255368A1 (fr) 2016-06-09 2016-06-09 Échangeur de chaleur, en particulier un radiateur à gaz ou un condenseur destiné à un véhicule

Country Status (1)

Country Link
EP (1) EP3255368A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1164345A1 (fr) * 1999-12-14 2001-12-19 Denso Corporation Echangeur de chaleur
DE102004042692A1 (de) 2004-09-01 2006-03-02 Behr Gmbh & Co. Kg Wärmeübertrager, insbesondere für Klimaanlagen
EP2208955A1 (fr) * 2009-01-15 2010-07-21 Valeo Systèmes Thermiques Intercalaire d'échange de chaleur pour un dispositif d'échange de chaleur.
US20110017440A1 (en) * 2009-07-24 2011-01-27 Denso Corporation Heat exchanger
WO2012027098A2 (fr) * 2010-08-24 2012-03-01 Carrier Corporation Ailette pour échangeur thermique à microcanaux

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1164345A1 (fr) * 1999-12-14 2001-12-19 Denso Corporation Echangeur de chaleur
DE102004042692A1 (de) 2004-09-01 2006-03-02 Behr Gmbh & Co. Kg Wärmeübertrager, insbesondere für Klimaanlagen
EP2208955A1 (fr) * 2009-01-15 2010-07-21 Valeo Systèmes Thermiques Intercalaire d'échange de chaleur pour un dispositif d'échange de chaleur.
US20110017440A1 (en) * 2009-07-24 2011-01-27 Denso Corporation Heat exchanger
WO2012027098A2 (fr) * 2010-08-24 2012-03-01 Carrier Corporation Ailette pour échangeur thermique à microcanaux

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