EP1256771A1 - Wärmetauscher - Google Patents

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Publication number
EP1256771A1
EP1256771A1 EP00912901A EP00912901A EP1256771A1 EP 1256771 A1 EP1256771 A1 EP 1256771A1 EP 00912901 A EP00912901 A EP 00912901A EP 00912901 A EP00912901 A EP 00912901A EP 1256771 A1 EP1256771 A1 EP 1256771A1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
tubes
heat
disposed
heat exchangers
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
EP00912901A
Other languages
English (en)
French (fr)
Other versions
EP1256771A4 (de
EP1256771B1 (de
Inventor
Muneo Zexel Valeo Climate Control Corp. SAKURADA
Soichi Zexel Valeo Climate Control Corp. KATO
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 Thermal Systems Japan Corp
Original Assignee
Zexel Valeo Climate Control Corp
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 Zexel Valeo Climate Control Corp filed Critical Zexel Valeo Climate Control Corp
Publication of EP1256771A1 publication Critical patent/EP1256771A1/de
Publication of EP1256771A4 publication Critical patent/EP1256771A4/de
Application granted granted Critical
Publication of EP1256771B1 publication Critical patent/EP1256771B1/de
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
    • 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
    • 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
    • F28D1/0408—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids
    • F28D1/0426—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids with units having particular arrangement relative to the large body of fluid, e.g. with interleaved units or with adjacent heat exchange units in common air flow or with units extending at an angle to each other or with units arranged around a central element
    • F28D1/0435—Combination of units extending one behind the other

Definitions

  • the present invention relates to a heat exchanger which is comprised of two or more heat exchangers having different usage.
  • Conventional heat exchangers used for vehicles include for example a heat exchanger which is comprised of two or more heat exchangers having different operations.
  • Japanese Patent Application Laid-Open Publication No. Hei 10-306994 discloses an invention of a heat exchanger which has a radiator core section for an engine and a condenser core section for a vehicle air conditioner configured integrally.
  • Hei 10-253276 has paid attention to a ratio between a width of fins and a number of louvers, which are disposed between tubes of a condenser core section and a radiator core section, and configures so that a heat exchanger having a small required radiation amount between two integrally configured heat exchangers has a small ratio between the fin width and the number of louvers and a heat exchanger having a large required radiation amount has a ratio between the fin width and the number of louvers larger than that of the heat exchanger having the above small required radiation amount.
  • Japanese Patent Application Laid-Open Publication No. Hei 10-170184 has paid attention to the shape of louvers formed on fins disposed between tubes of two heat exchangers, and improved the heat exchange efficiency of the two heat exchangers by configuring so that the louvers formed on the fins which are fitted to one of the heat exchangers have a shape different from louvers formed on the fins which are fitted to the other heat exchanger.
  • a speed of air which has passed through the tubes 13 of the first heat exchanger is lowered by the presence of the tubes 13 of the first heat exchanger disposed on the windward of the ventilating direction and then the air is spread, so that the air speed is lowered along the surfaces of the tubes 14 and the portions of fins 6 in proximity to the tubes of the second heat exchanger, and the heat-exchanging performance of the second heat exchanger is significantly lowered.
  • the first and second heat exchangers To mount the heat exchangers within an engine room having a limited mounting space, the first and second heat exchangers must be mutually placed as close as possible, and they are also demanded to be light-weighted.
  • the present invention has been completed in view of the aforesaid disadvantages, and it is an object of the invention to provide a heat exchanger which is comprised of two or more heat exchangers disposed in parallel at right angles to a ventilating direction and which can keep the heat-exchanging performance of a heat exchanger disposed on the leeward side.
  • the invention described in claim 1 of this application is a heat exchanger comprised of two or more heat exchangers which are disposed on the windward and leeward side of a ventilating direction in parallel at right angles to the ventilating direction, wherein the heat exchangers are configured by stacking a plurality of tubes; and the heights of the tubes of one heat exchanger disposed on the windward of the ventilating direction are lower than the heights of the tubes of the other heat exchanger disposed on the leeward side.
  • the speed of the outside air having passed through the tubes of the first heat exchanger is lowered by the presence of the tubes of the first heat exchanger which is on the windward in the ventilating direction.
  • the outside air having passed through the first heat exchanger is spread and its speed is lowered on the surfaces of the tubes and the portions of the fins in proximity to the tubes of the second heat exchanger, and the heat-exchanging performance of the second heat exchanger is lowered considerably.
  • the heights of the tubes configuring the first heat exchanger are lower than the heights of the tubes configuring the second heat exchanger, so that ventilation of the outside air is not disturbed, and the outside air is allowed to reach the surfaces of the tubes configuring the second heat exchanger.
  • the heat-exchanging performance of the second heat exchanger can be kept.
  • the invention described in claim 3 is directed to the invention according to claim 1 or 2, wherein the respective tubes have a height of less than 1.6 mm.
  • the tubes configuring the heat exchanger are desired to have a height of 1.6 mm or less in view of the heat-exchanging efficiency of the heat exchanger and its weight reduction.
  • the heat-exchanging efficiency is further improved by determining the tubes to have a height of 1.3 mm or less, and it becomes possible to make the heat exchanger more compact and light-weighted.
  • the invention described in claim 4 is directed to the invention according to any of claims 1 to 3, wherein the two or more heat exchangers disposed in parallel have a space of 15 mm or less between them.
  • first and second heat exchangers when the first and second heat exchangers are mounted in an engine room, it is desired to mount the first and second heat exchangers, which are disposed in parallel, as close as possible to each other in order to reduce a mounting space. Meanwhile, when the first and second heat exchangers are disposed adjacent to each other, the outside air flowing to the second heat exchanger is disturbed by the first heat exchanger disposed on the windward in the ventilating direction, and the heat-exchanging performance of the heat exchanger disposed on the leeward side in the ventilating direction cannot be kept.
  • the heights of the tubes configuring the heat exchanger disposed on the windward are smaller than the heights of the tubes configuring the heat exchanger disposed on the leeward side. Therefore, the heat-exchanging performance of the second heat exchanger can be kept even if the first and second heat exchangers are disposed closely to have a space of 15 mm between them.
  • the heat exchangers to be mounted closely to each other in the engine room are often comprised of the condenser configuring a heat exchange cycle for air conditioning and the radiator for cooling an engine, which are required to have high heat-exchanging performance.
  • the heat exchangers are integrally configured by a common member, for example, a bracket, the heat exchangers are light-weighted, and their mounting in the engine room or the like is facilitated without increasing the mounting space.
  • Fig. 1 is a perspective view schematically showing the structure of this embodiment.
  • the heat exchanger of this embodiment has first and second heat exchangers 1, 2 which are disposed in parallel with respect to a ventilating direction.
  • the individual heat exchangers 1, 2 have a plurality of tubes 3, 4 and fins 5, 6 fitted between the tubes 3, 4 to increase a radiation area.
  • the tubes 3, 4 and the fins 5, 6 are stacked into a plurality of layers, and each end of the tubes 3, 4 is connected to header tanks 7, 8, 9, 10.
  • a heat-exchanging medium is distributed to flow from the respective header tanks 7, 8 to the individual tubes 3, 4 to perform heat exchange so that the high-temperature medium becomes a low-temperature medium by radiation from the tubes 3, 4 and the fins 5, 6.
  • An arrow in Fig. 1 indicates a ventilating direction of outside air.
  • the first and second heat exchangers 1, 2 of this embodiment are supported and integrally configured by common members.
  • brackets 15 are used to fix the first and second heat exchangers 1, 2 with bolts.
  • two brackets 15 each are disposed on the top and bottom of end plates of both heat exchangers, and a bolt is inserted for fixing through each bracket in the longitudinal direction of a vehicle.
  • a condenser for a vehicle air conditioner which is the first heat exchanger 1 is disposed on the windward of the ventilating direction, and an engine radiator which is the second heat exchanger 2 is disposed on the leeward side of the ventilating direction.
  • the heat exchangers 1, 2 of this embodiment have a space K of 15 mm between the condenser as the first heat exchanger 1 and the radiator as the second heat exchanger 2 in order to reduce a mounting space. Especially, it is significant to reduce the mounting space in order to mount the heat exchangers on a vehicle.
  • height hc of the tubes configuring the first heat exchanger 1 which is disposed in parallel to the second heat exchanger and at right angles to the ventilating direction is determined to be smaller than height hr of the tubes configuring the second heat exchanger 2.
  • the heights of the tubes configuring the first and second heat exchangers which are disposed in parallel at right angles to the ventilating direction have a relation of hc ⁇ hr.
  • Fig. 2 is a partially sectional view of the first and second heat exchangers 1, 2, showing the tubes 3, 4 and the fins 5, 6.
  • reference numerals 11, 12 indicate louvers formed on the fins 5, 6.
  • the arrows in the drawing indicate the ventilating direction of outside air.
  • Fig. 3 is a diagram showing a relation between a ratio of the heights of the tubes configuring the first and second heat exchangers and a heat radiation amount of the second heat exchanger.
  • the ratio of the heat radiation amount of the second heat exchanger is improved when hr/hc > 1 or more, namely when the heights of the tubes of the condenser disposed on the windward of the ventilating direction are smaller than the heights of the tubes of the radiator disposed on the leeward side of the ventilating direction.
  • Point A in Fig. 3 indicates that a relation between the heights of the tubes 3, 4 of the first and second heat exchangers is hr/hc > 1 shown in this embodiment.
  • a Point C in Fig. 3 indicates that a relation between the heights hr and hc of the tubes of the first and second heat exchangers is hr/hc ⁇ 1.
  • the tubes 3, 4 configuring the heat exchangers 1, 2 are desired to have a height of less than 1.6 mm considering the heat-exchanging performance and weight reduction of the heat exchangers.
  • the first heat exchanger is a condenser as in this embodiment
  • the heat-exchanging efficiency is improved furthermore by determining the tubes to have a height of 1.3 mm or less.
  • the heat exchanger can be made more compact and light-weighted.
  • the tubes 3, 4 of the heat exchangers 1, 2 are formed in this embodiment basically to satisfy the relation of hc ⁇ hr ⁇ 1.6 mm.
  • the heat-exchanging performance of the second heat exchanger can be improved better than before without increasing the mounting space.
  • the condenser used for a heat-exchanging cycle of a car air conditioner and the radiator for cooling an engine are disposed in an engine room in parallel at right angles to the ventilating direction.
  • the tubes of the condenser as the first heat exchanger are configured to have a height smaller than the heights of the tubes of the radiator as the second heat exchanger as in this embodiment, the heat-exchanging performance of the second heat exchanger is not disturbed by the first heat exchanger, and the required high heat-exchanging performance can be obtained.
  • the heat exchanger according to the present invention which is comprised of two or more heat exchangers disposed in parallel on the windward and leeward in the ventilating direction, can improve the heat-exchanging performance of the second heat exchanger disposed on the leeward side, so that the heat exchanger can be made compact and light-weighted.
  • the heat exchanger of the invention is suitable for a refrigerating cycle for vehicles and household appliances.

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)
  • Air-Conditioning For Vehicles (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)
EP00912901A 1999-07-19 2000-03-29 Fahrzeug umfassend zwei wärmetauscher Expired - Lifetime EP1256771B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP20435499 1999-07-19
JP20435499A JP3625259B2 (ja) 1999-07-19 1999-07-19 熱交換器
PCT/JP2000/001935 WO2001006194A1 (fr) 1999-07-19 2000-03-29 Echangeur de chaleur

Publications (3)

Publication Number Publication Date
EP1256771A1 true EP1256771A1 (de) 2002-11-13
EP1256771A4 EP1256771A4 (de) 2005-11-09
EP1256771B1 EP1256771B1 (de) 2008-10-22

Family

ID=16489128

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00912901A Expired - Lifetime EP1256771B1 (de) 1999-07-19 2000-03-29 Fahrzeug umfassend zwei wärmetauscher

Country Status (4)

Country Link
EP (1) EP1256771B1 (de)
JP (1) JP3625259B2 (de)
DE (1) DE60040620D1 (de)
WO (1) WO2001006194A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8196646B2 (en) 2008-12-15 2012-06-12 Delphi Technologies, Inc. Heat exchanger assembly

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4420689B2 (ja) * 2004-01-29 2010-02-24 株式会社ヴァレオサーマルシステムズ 自動車のフロント構造
JP2008039322A (ja) * 2006-08-08 2008-02-21 Univ Of Tokyo 熱交換器およびこれを備える熱交換装置
JP7047361B2 (ja) * 2017-12-08 2022-04-05 株式会社デンソー 熱交換器

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58108394A (ja) * 1981-12-21 1983-06-28 Hitachi Ltd 熱交換器
DE4327213A1 (de) * 1993-08-13 1995-02-16 Ruecker Gmbh Rekuperativer Wärmetauscher, insbesondere Kühler für Kraftfahrzeuge
EP0773419A2 (de) * 1995-11-13 1997-05-14 Denso Corporation Wärmetauscher
US5730213A (en) * 1995-11-13 1998-03-24 Alliedsignal, Inc. Cooling tube for heat exchanger
JPH11148795A (ja) * 1997-11-14 1999-06-02 Toyo Radiator Co Ltd 複合型熱交換器
WO1999028692A1 (fr) * 1997-11-28 1999-06-10 Zexel Corporation Echangeurs de chaleur paralleles formant une unite et leur procede de fabrication

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5529116A (en) * 1989-08-23 1996-06-25 Showa Aluminum Corporation Duplex heat exchanger
JP3855346B2 (ja) * 1997-03-17 2006-12-06 株式会社デンソー 熱交換器
JPH1194485A (ja) * 1997-09-19 1999-04-09 Denso Corp 複式熱交換器

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58108394A (ja) * 1981-12-21 1983-06-28 Hitachi Ltd 熱交換器
DE4327213A1 (de) * 1993-08-13 1995-02-16 Ruecker Gmbh Rekuperativer Wärmetauscher, insbesondere Kühler für Kraftfahrzeuge
EP0773419A2 (de) * 1995-11-13 1997-05-14 Denso Corporation Wärmetauscher
US5730213A (en) * 1995-11-13 1998-03-24 Alliedsignal, Inc. Cooling tube for heat exchanger
JPH11148795A (ja) * 1997-11-14 1999-06-02 Toyo Radiator Co Ltd 複合型熱交換器
WO1999028692A1 (fr) * 1997-11-28 1999-06-10 Zexel Corporation Echangeurs de chaleur paralleles formant une unite et leur procede de fabrication

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 007, no. 215 (M-244), 22 September 1983 (1983-09-22) -& JP 58 108394 A (HITACHI SEISAKUSHO KK), 28 June 1983 (1983-06-28) *
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 11, 30 September 1999 (1999-09-30) -& JP 11 148795 A (TOYO RADIATOR CO LTD), 2 June 1999 (1999-06-02) *
See also references of WO0106194A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8196646B2 (en) 2008-12-15 2012-06-12 Delphi Technologies, Inc. Heat exchanger assembly

Also Published As

Publication number Publication date
WO2001006194A1 (fr) 2001-01-25
DE60040620D1 (de) 2008-12-04
EP1256771A4 (de) 2005-11-09
JP2001033193A (ja) 2001-02-09
EP1256771B1 (de) 2008-10-22
JP3625259B2 (ja) 2005-03-02

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