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EP1632742B1 - Echangeur de chaleur, en particulier pour installation de climatisation - Google Patents

Echangeur de chaleur, en particulier pour installation de climatisation Download PDF

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Publication number
EP1632742B1
EP1632742B1 EP05016196.7A EP05016196A EP1632742B1 EP 1632742 B1 EP1632742 B1 EP 1632742B1 EP 05016196 A EP05016196 A EP 05016196A EP 1632742 B1 EP1632742 B1 EP 1632742B1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
flat tubes
rib
width
flat
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
EP05016196.7A
Other languages
German (de)
English (en)
Other versions
EP1632742A3 (fr
EP1632742A2 (fr
Inventor
Walter Dipl.-Ing. Demuth
Martin Dipl.-Ing. Kotsch
Michael Dipl.-Ing. Kranich
Karl-Heinz Dipl.-Ing. Staffa
Christoph Dipl.-Ing. Walter
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.)
Mahle Behr GmbH and Co KG
Original Assignee
Mahle Behr GmbH and Co KG
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 Mahle Behr GmbH and Co KG filed Critical Mahle Behr GmbH and Co KG
Publication of EP1632742A2 publication Critical patent/EP1632742A2/fr
Publication of EP1632742A3 publication Critical patent/EP1632742A3/fr
Application granted granted Critical
Publication of EP1632742B1 publication Critical patent/EP1632742B1/fr
Ceased legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • F28D1/053—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 straight
    • F28D1/0535—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 straight the conduits having a non-circular cross-section
    • F28D1/05366—Assemblies of conduits connected to common headers, e.g. core type radiators
    • F28D1/05383—Assemblies of conduits connected to common headers, e.g. core type radiators with multiple rows of conduits or with multi-channel conduits
    • 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
    • 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
    • F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction

Definitions

  • the invention relates to a heat exchanger, in particular for air conditioning systems, according to the preamble of claim 1.
  • Pressure-stable heat exchangers are known in particular for automotive air conditioning systems which are operated with CO2 or R744.
  • the high pressures occurring in the supercritical refrigeration process require a pressure-stable design of the pipes carrying the refrigerant and the associated collection container, which are preferably designed as thick-walled headers.
  • the tubes are often designed as extruded multi-chamber tubes, in particular with circular or elliptical cross sections.
  • This design has the advantage, inter alia, that the diameter of the collecting pipes in relation to the pipe width (measured in the direction of air flow) can be chosen to be relatively small.
  • the flat tube ends are twisted by 90 ° and taken in such a compact manner in a preferably continuous longitudinal slot that their narrow sides (relative to the flat tube cross section) are close to each other.
  • the flat tube ends are soldered to the slotted manifold and thus form a pressure-stable heat exchanger, which withstands the occurring pressures of about 120 bar.
  • a problem with this construction is derived from the fact that between the block depth, which corresponds to the pipe and corrugated fin width (measured in the air flow direction), and the pipe pitch is a fixed relationship: the pitch of the tubes corresponds to their width or the sum of fin height and pipe thickness.
  • the block depth which is a measure of the efficiency of the heat exchanger, can not be increased without further ado - rather, this block design has a limitation on the block depth.
  • a so-called one-sided rib projection is provided for the corrugated ribs, d. H.
  • the corrugated fins arranged between the flat tubes protrude to one side over the narrow sides of the flat tubes and close flush with the other side (end face). With this fin overhang the advantage of a higher heat transfer performance is achieved by improving the air-side heat transfer.
  • one side (face) of the heat exchanger block is smooth and thus can be placed on a flat surface during "Kassettieren".
  • the fin projection can be arranged on the inflow side (windward side) or the outflow side (leeward side) of the heat exchanger.
  • a gas cooler or condenser which can preferably be arranged in the front engine compartment of a motor vehicle
  • a better condensate would result in circumstances, if the fin overhang on the leeward side of the evaporator is arranged.
  • Fig. 1 shows a perspective view of a heat exchanger block 1, hereinafter referred to as block, wherein the entire heat exchanger is not shown, but in its construction of the above-mentioned document of the Applicant, the DE-A 198 46 267 equivalent.
  • the block 1 has flat tubes 2, between which corrugated fins 3 are arranged, which are soldered with their wave crests with the flat sides of the flat tubes 2.
  • the flat tubes 2 are formed as extruded multi-chamber tubes with circular or elliptical flow channels 2a.
  • the ends of the flat tubes 2, not shown, are twisted and received in a longitudinal section, not shown, of a collecting tube. This results in a fixed relation between pipe pitch and pipe width, which will be discussed in more detail below.
  • the corrugated fins 3 have - what is known - gills or gill arrays 3a for improvement the heat transfer on.
  • the corrugated fins 3 are overflowed by ambient air, while the flow channels 2 a of the flat tubes 2 are traversed by a supercritical refrigerant, preferably R 744 or CO 2, which flows through a refrigerant circuit, not shown, of a motor vehicle air conditioner.
  • the corrugated fins 3 are on one side (in the drawing, the upper) in the air flow direction beyond the tubes, ie they form a so-called fin projection 4, which is only distorted recognizable in the perspective view and will therefore be explained in more detail below.
  • Fig. 2 shows the same section of the block 1 in a cross section through the flat tubes 2.
  • the flat tubes 2 have narrow sides 5 on one side of the block 1 and narrow sides 6 on the other side of the block 2.
  • the air flow direction is represented by arrows L.
  • the rib supernatant 4 is arranged in the illustrated embodiment on the air inflow side (windward side), that is, the corrugated fins 3 are opposite to the air flow direction L on the narrow sides 6 of the flat tubes by an amount Ü addition.
  • the width of the flat tubes 2, measured in the direction of air flow L, is B, while the total width of the corrugated fins 3, including the fin projection Ü, is marked B '.
  • the rib height is denoted by H
  • the tube thickness by D
  • the pitch of the flat tubes 2 ie their center distance with t.
  • the dimension Ü for the unilateral rib projection 4 is in a range of 5 to 20% of the flat tube width B. In this area, on the one hand there is an increase in the heat transfer and thus a performance improvement for the entire heat exchanger, on the other hand the risk of damage during transport or installation relatively low.
  • the rib supernatant 4 on the windward side is advantageous, for example, for a gas cooler, which is arranged in the front region of the engine compartment of a motor vehicle, because the rib projection 4 proves to protect the narrow sides 6 against falling rocks.
  • the rib supernatant may also be arranged on the leeward side, for. B. in an evaporator, which is located inside an air conditioner and therefore is not exposed to stone chipping.
  • condensate formation occurs in the evaporator. This condensate can flow better at a leeward rib protrusion.
  • the performance increase is due to the rib overhang, ie its measure Ü regardless of whether it is located on the upstream or the downstream side of the corrugated fins 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Claims (2)

  1. Echangeur de chaleur comprenant au moins un bac collecteur, tel qu'un tube collecteur, et comprenant un bloc d'échangeur de chaleur (1) constitué d'ailettes ondulées (3) ainsi que de tubes plats (2), où les extrémités des tubes plats (2) sont tordues de 90° et sont logées dans des fentes longitudinales du tube collecteur, et présentent des sections droites ayant des petits côtés droits (5, 6), caractérisé en ce que les ailettes ondulées (3) disposées entre les tubes plats (2) se terminent, sur un côté, en étant à fleur des petits côtés (5) et, sur l'autre côté, dépassent des autres petits côtés (6) et forment un débordement d'ailettes (4), où, mesurés dans la direction d'écoulement L de l'air, les tubes plats (2) présentent une largeur B, les ailettes ondulées une largeur B' et le débordement d'ailettes une dimension Ü, où la largeur B' est égale à B + Ü, et en ce que la dimension Ü se situe dans la plage suivante : 0,05 B ≤ Ü ≤ 0,20 B, où les ailettes ondulées, sur la totalité de leur largeur (B'), présentent des ouïes, y compris sur le débordement d'ailettes (Ü).
  2. Echangeur de chaleur selon la revendication 1, caractérisé en ce que les tubes plats (2) présentent une étendue tubulaire t qui correspond à la largeur B et à la somme de la hauteur H des ailettes et de l'épaisseur D des tubes plats.
EP05016196.7A 2004-09-01 2005-07-26 Echangeur de chaleur, en particulier pour installation de climatisation Ceased EP1632742B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004042692A DE102004042692A1 (de) 2004-09-01 2004-09-01 Wärmeübertrager, insbesondere für Klimaanlagen

Publications (3)

Publication Number Publication Date
EP1632742A2 EP1632742A2 (fr) 2006-03-08
EP1632742A3 EP1632742A3 (fr) 2011-09-28
EP1632742B1 true EP1632742B1 (fr) 2018-12-19

Family

ID=35432073

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05016196.7A Ceased EP1632742B1 (fr) 2004-09-01 2005-07-26 Echangeur de chaleur, en particulier pour installation de climatisation

Country Status (2)

Country Link
EP (1) EP1632742B1 (fr)
DE (1) DE102004042692A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5563162B2 (ja) * 2011-07-14 2014-07-30 パナソニック株式会社 室外熱交換器および車両用空調装置
FR2991034B1 (fr) * 2012-05-25 2014-06-06 Valeo Systemes Thermiques Intercalaire pour echangeur thermique et echangeur thermique associe
JP2015200442A (ja) * 2014-04-07 2015-11-12 株式会社デンソー 熱交換器
EP3255368A1 (fr) 2016-06-09 2017-12-13 Valeo Systemes Thermiques Échangeur de chaleur, en particulier un radiateur à gaz ou un condenseur destiné à un véhicule

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06147785A (ja) * 1992-11-04 1994-05-27 Hitachi Ltd ヒートポンプ用室外熱交換器
EP1164345A1 (fr) * 1999-12-14 2001-12-19 Denso Corporation Echangeur de chaleur

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4328861A (en) * 1979-06-21 1982-05-11 Borg-Warner Corporation Louvred fins for heat exchangers
DE19649129A1 (de) * 1996-11-27 1998-05-28 Behr Gmbh & Co Flachrohr-Wärmeübertrager mit umgeformtem Flachrohrendabschnitt
DE19846267A1 (de) 1998-10-08 2000-04-13 Behr Gmbh & Co Sammelrohreinheit für einen Wärmeübertrager
DE20010994U1 (de) * 2000-06-21 2000-08-31 Behr Gmbh & Co, 70469 Stuttgart Netz für einen Wärmeübertrager
DE10221457A1 (de) * 2002-05-15 2003-11-27 Behr Gmbh & Co Wärmeübertrager und Verfahren zu seiner Herstellung

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06147785A (ja) * 1992-11-04 1994-05-27 Hitachi Ltd ヒートポンプ用室外熱交換器
EP1164345A1 (fr) * 1999-12-14 2001-12-19 Denso Corporation Echangeur de chaleur

Also Published As

Publication number Publication date
DE102004042692A1 (de) 2006-03-02
EP1632742A3 (fr) 2011-09-28
EP1632742A2 (fr) 2006-03-08

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