EP1455154A2 - Verdampfer - Google Patents

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Publication number
EP1455154A2
EP1455154A2 EP04004978A EP04004978A EP1455154A2 EP 1455154 A2 EP1455154 A2 EP 1455154A2 EP 04004978 A EP04004978 A EP 04004978A EP 04004978 A EP04004978 A EP 04004978A EP 1455154 A2 EP1455154 A2 EP 1455154A2
Authority
EP
European Patent Office
Prior art keywords
tubes
evaporator
tube
windward
core
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Withdrawn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
EP04004978A
Other languages
English (en)
French (fr)
Inventor
Hiroyuki Inaba
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.)
Marelli Corp
Original Assignee
Calsonic Kansei 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 Calsonic Kansei Corp filed Critical Calsonic Kansei Corp
Publication of EP1455154A2 publication Critical patent/EP1455154A2/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F28D1/03—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 plate-like or laminated conduits
    • F28D1/0391—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 plate-like or laminated conduits a single plate being bent to form one or more 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
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/025—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being corrugated, plate-like elements
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
    • F28D2021/0085—Evaporators

Definitions

  • the present invention relates to an evaporator, and particularly, to an evaporator installed in an air conditioner for a vehicle.
  • An evaporator evaporates coolant inside the evaporator to thereby cool air passing outside the evaporator.
  • An example of an evaporator includes a pair of header tanks and a plurality of tubes, as heat exchange tubes, that are arranged between and connected to the header tanks. Between the tubes, corrugated outer fins are arranged.
  • the tubes occupy a large part of the volume of the evaporator, and therefore, it is particularly required to reduce the weight of the tubes.
  • the tubes are structurally classified into the following two types:
  • the type-2 tube that does not have a joint is more preferable than the type-1 tube having joints between the two metal plates.
  • the tubes of the evaporator tend to condense moisture in the air passing around the tubes. Accordingly, compared with tubes of other heat exchangers, the tubes of the evaporator easily get foreign matter, such as dust, passing around the tubes. Such foreign matter adhering to the tubes may be the starting point for corrosion. In particular, the type-2 tube is susceptible to corrosion when the tube is made thinner for weight reduction.
  • the present application relates to an evaporator employing light and corrosion-resistive (durable) tubes.
  • An aspect of the present invention provides an evaporator having at least one core.
  • the core has tubes and a pair of tanks.
  • the tube is configured to internally pass coolant, each of the tubes formed by bending a plate material and joining both edges of the bent plate material to each other.
  • a pair of header tanks is connected to and communicates with each open end of the tubes.
  • the jointed edge of the tubes is arranged on the windward side.
  • the tube having only one joint can achieve weight reduction comparable to the type-2 tube made by extrusion.
  • the joint of the tube is arranged on the windward side to further improve corrosion resistance as compared to the type-2 tube made by extrusion.
  • the tubes of this aspect of the invention can achieve weight reduction and high corrosion resistance, to thereby provide an evaporator that is light and corrosion resistive.
  • FIGS 1 to 6 show an evaporator according to the first embodiment of the present invention.
  • the evaporator 10 is installed in an air conditioner for a vehicle and is arranged downstream from a fan and upstream of a heater core in a casing of the air conditioner.
  • the evaporator 10 exchanges heat between coolant flowing through tubes and air passing outside the tubes, to thereby dehumidify and cool air sent from the fan.
  • the evaporator 10 has a core 10A and a core 10B arranged inline in an airflow direction.
  • the first core 10A is on the windward side and the second core 10B is on the leeward side.
  • a reference numeral 18 represents a reinforcing side plate.
  • the first core 10A includes corrugated outer fins 11, tubes 12 alternated with the fins 11 for internally passing coolant, and a pair of header tanks 13 connected to and communicating with each open end of the tubes 12.
  • the second core 10B includes the corrugated outer fins 11, tubes 15 alternated with the fins 11 and internally passing coolant, and a pair of header tanks 16 connected to and communicating with each open end of the tubes 15.
  • the outer fins 11 extend along the cores 12 and 15 through the first core 10A and second core 10B in the airflow direction. As another way of explaining, each outer fin 11 is shared by the first and second cores 10A and 10B.
  • the structure of the tube 12 will be explained in detail with reference to Figs. 2 to 6.
  • the tubes 12 of the first core 10A and the tubes 15 of the second core 10B have an identical structure, and therefore, the tube 12 will be explained representatively.
  • the tube 12 is made of a long aluminum plate.
  • the aluminum plate has a core material (aluminum alloy having a relatively high melting point) 12A and brazing materials (aluminum alloy having a relatively low melting point) 12B and 12C that are on each face of the core material 12A.
  • the aluminum plate may be replaced with any material having a good heat transfer characteristic.
  • the tube 12 is formed by bending a metal plate in the width direction and joining both edges 21 of the bent plate to each other. More precisely, in Fig. 5A, a metal plate is formed by rolling or pressing the metal plate into a depressed shape with two flat edges 21. In Fig. 5B, the metal plate is bent along a center bend line 22, indicated by a dotted line, into a tube-shape having a roundness of a given radius along the center bend line 22. At this time, the edges 21 are fitted or joined to each other. A corrugated inner fin 25 (Fig. 3) is inserted into the tube 12. The tube 12 is heated to fix or join the edges 21 to each other by brazing, to complete the long flat tube 12 shown in Fig. 5C.
  • the completed tube 12 has a flat tube body 20, the joint 21 protruding from the tube body 20, and the inner fin 25 arranged in the tube body 20.
  • the joint 21 of the most windward side tubes 12 are oriented windward.
  • the tube 12 having the thick joint 21 on the windward side has improved corrosion resistance compared with the type-2 tube made by extrusion, and due to this, the tube body 20 of the tube 12 may be made thinner, to make the tube 12 light and corrosion resistive.
  • a windward end face 12a of the tube 12 and a windward end face 11a of the outer fin 11 is flush with each other facing an airflow direction.
  • Figure 6B shows a comparison example with a windward end face 12a (end face of a joint 21) of a tube 12 being displaced from a windward end face 11a of an outer fin 11 in an airflow direction.
  • a distance d3 (> d4) between the foreign matter and the tube body 20 of the first embodiment of Fig. 6A is longer than any other arrangements, including the arrangement of Fig. 6B. Accordingly, the first embodiment can effectively prevent corrosion of the tube body 20.
  • the inner fin 25 has a corrugated shape. More precisely, the inner fin 25 comprises first parallel sections 26 that are substantially parallel to and connected to a first side wall 23 of the tube 12, second parallel sections 27 that are substantially parallel to and connected to a second side wall 24 of the tube 12, and orthogonal sections 28 that are substantially orthogonal to the first and second side walls 23 and 24 and link the first and second parallel sections 26 and 27 with each other.
  • the orthogonal sections 28 function as supports of the tube 12 to improve the pressure resistance of the tube 12.
  • a plate thickness d5 of the inner fin 25 is thinner than a plate thickness d1 of the tube 12 as shown in Fig. 3.
  • the tubes 12 are each formed by bending a metal plate 19 and joining both edges 21 of the bent plate 19 to each other, to reduce the number of joints to less than that of the type-1 tube made by joining two metal plates together.
  • the thick joint 21 of the tube 12 of the most windward side core 10A is arranged on the windward side (Figs. 2 and 6) where corrosion may start. This structural arrangement improves corrosion resistance of the tube 12 and 15 compared with the type-2 tube made by extrusion.
  • the improved corrosion resistance of the tube 12 (15) enables the tube body 20 to be thinned. As a result, the tube 12 (15) can achieve weight reduction and improved corrosion resistance. Therefore, the evaporator 10 according to the first embodiment employing the tubes 12 and 15 is light and corrosion resistive.
  • each tube 12 is substantially made flush with the windward end face 11a of each outer fin 11 in an airflow direction (Fig. 6A).
  • foreign matter may adhere to the windward end of the tube 12 that is farthest from the tube body 20.
  • An erosion of the tube 12 from the windward takes more time. This structural arrangement effectively prevents the tube body 20 from corroding.
  • the cores 10A and 10B are arranged in line in an airflow direction, to greatly improve the heat exchange efficiency of the evaporator 10 per unit airflow area.
  • the outer fins 11 are extended along the tubes 12 and 15 that are arranged in line in the airflow direction. Alternating the outer fins 11 with the tubes 12 and 15 enables easy assembling of the evaporator 10.
  • each of the tubes 12 and 15 has the inner fin 25 to improve the heat exchange efficiency and pressure resistance of the tube.
  • the plate thickness d5 of the inner fin 25 is thinner than the plate thickness d1 of the tube 12 (Fig. 3). This configuration helps reduce the weight of the tubes 12 and 15.
  • the inner fin 25 has the orthogonal sections 28 that are substantially orthogonal to the first and second side walls 23 and 24 of the tube 12 (15) and link the first and second parallel sections 26 and 27 of the inner fin 25 with each other.
  • the orthogonal sections 28 function as supports of the tube 12 (15) to improve the pressure resistance of the tube 12 (15).
  • FIG. 7 is a sectional view partly showing an evaporator according to the second embodiment of the present invention.
  • the same parts as those of the first embodiment are represented with like reference numerals and will not be explained in detail.
  • a difference from the first embodiment is that the second embodiment orients joints 21 of the most leeward tubes 15 leeward. That is, in the evaporator 30, joints 21 of the most windward tubes 12 are oriented windward and the joints 21 of the most leeward tubes 15 are oriented leeward. Since the joints 21 are present at windward and leeward ends, the evaporator 30 can provide the same effects as the first embodiment even if the evaporator 30 is turned around in the airflow direction. This provides a greater the degree of freedom in positioning the evaporator 30.
  • FIG. 8 shows an evaporator 40 according to the third embodiment of the present invention.
  • the evaporator 40 has a single core 10A instead of a plurality of cores (two or more cores) arranged in line in an airflow direction.
  • the structure of a joint of a tube used for an evaporator according to the present invention is not limited the above embodiments.
  • Other tube structures such as those shown in Figs. 9A to 9C are also possible according to the present Invention.
  • the most preferable structure for the joint 21 of the tube 12 (15) is that explained in any one of the first to third embodiments.
  • a tube 50 has edges 51 and 52 where the edge 51 (upper edge in Fig. 9A) is longer than the edge 52 (lower edge in Fig. 9A) and is folded along the edge 52 into a U-shape to cover the edge 52.
  • a tube 60 has edges 61 and 62 that are inwardly folded in advance and are joined together. Instead of folding each of the edges 61 and 62 inwardly, each may be folded outwardly.
  • a tube 70 has edges 71 and 72 with each of their ends 71a and 72a being outwardly bent in an L-shape to form an inverted T-shape joint in an airflow direction.
  • Figure 10 shows an evaporator serving as a comparison example.
  • the evaporator of Fig.10 employs tubes 100, each being the type-1 tube made by joining two metal plates 101 together.
  • Numeral 102 represents an inner fin and 103 an outer fin arranged between the adjacent tubes 100.
  • Figure 11 shows an evaporator serving as another comparison example.
  • the evaporator of Fig. 11 employs tubes 200, each being the type-2 tube made by extrusion.

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)
  • Air-Conditioning For Vehicles (AREA)
EP04004978A 2003-03-04 2004-03-03 Verdampfer Withdrawn EP1455154A2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003057354 2003-03-04
JP2003057354A JP2004263997A (ja) 2003-03-04 2003-03-04 エバポレータ

Publications (1)

Publication Number Publication Date
EP1455154A2 true EP1455154A2 (de) 2004-09-08

Family

ID=32821181

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04004978A Withdrawn EP1455154A2 (de) 2003-03-04 2004-03-03 Verdampfer

Country Status (3)

Country Link
US (1) US20040206481A1 (de)
EP (1) EP1455154A2 (de)
JP (1) JP2004263997A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8561451B2 (en) 2007-02-01 2013-10-22 Modine Manufacturing Company Tubes and method and apparatus for producing tubes
WO2013174730A1 (fr) * 2012-05-22 2013-11-28 Valeo Systemes Thermiques Tube d'échangeur de chaleur, faisceau de tube d'échangeur de chaleur, échangeur de chaleur comprenant un tel faisceau et procédé de fabrication d'une plaque d'un tube d'échangeur de chaleur
EP3819576A1 (de) * 2019-11-05 2021-05-12 Sanhua (Hangzhou) Micro Channel Heat Exchanger Co. Ltd Wärmetauscherrohr und wärmetauscher damit

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8434227B2 (en) 2006-01-19 2013-05-07 Modine Manufacturing Company Method of forming heat exchanger tubes
JP2007291937A (ja) * 2006-04-25 2007-11-08 Calsonic Kansei Corp 車両用熱交換器の保護部材構造
JP2015059732A (ja) * 2013-09-20 2015-03-30 株式会社デンソー 熱交換器
JP2015081744A (ja) * 2013-10-24 2015-04-27 サンデン株式会社 熱交換器
JP2015200442A (ja) * 2014-04-07 2015-11-12 株式会社デンソー 熱交換器
JP2018040513A (ja) * 2016-09-06 2018-03-15 株式会社デンソー 熱交換器用チューブ及び熱交換器
JP2018087660A (ja) * 2016-11-29 2018-06-07 株式会社デンソー ドロンカップ式熱交換器
JP7047361B2 (ja) * 2017-12-08 2022-04-05 株式会社デンソー 熱交換器
EP3671089A1 (de) 2018-12-21 2020-06-24 Mahle International GmbH Wärmetauscher

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0645155Y2 (ja) * 1988-10-24 1994-11-16 サンデン株式会社 熱交換器
US5186250A (en) * 1990-05-11 1993-02-16 Showa Aluminum Kabushiki Kaisha Tube for heat exchangers and a method for manufacturing the tube
JPH07227631A (ja) * 1993-12-21 1995-08-29 Zexel Corp 積層型熱交換器の熱交換用導管及びその製造方法
JPH1019485A (ja) * 1996-06-27 1998-01-23 Calsonic Corp 熱交換器
JP3572146B2 (ja) * 1996-07-03 2004-09-29 三菱重工業株式会社 車両用空調装置
DE69719489T2 (de) * 1996-12-04 2003-12-24 Zexel Valeo Climate Contr Corp Wärmetauscher
JP4019113B2 (ja) * 1997-11-13 2007-12-12 株式会社ティラド 一体型熱交換器のフィンとその製造方法
US6237676B1 (en) * 1998-04-28 2001-05-29 Denso Corporation Heat exchanger for vehicle air conditioner
JP3913897B2 (ja) * 1998-05-06 2007-05-09 カルソニックカンセイ株式会社 コンデンサ用冷媒チューブの製造装置
DE19920102B4 (de) * 1999-05-03 2009-01-02 Behr Gmbh & Co. Kg Mehrkammerrohr und Wärmeübertrageranordnung für ein Kraftfahrzeug

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8561451B2 (en) 2007-02-01 2013-10-22 Modine Manufacturing Company Tubes and method and apparatus for producing tubes
WO2013174730A1 (fr) * 2012-05-22 2013-11-28 Valeo Systemes Thermiques Tube d'échangeur de chaleur, faisceau de tube d'échangeur de chaleur, échangeur de chaleur comprenant un tel faisceau et procédé de fabrication d'une plaque d'un tube d'échangeur de chaleur
FR2991035A1 (fr) * 2012-05-22 2013-11-29 Valeo Systemes Thermiques Tube d'echangeur de chaleur, faisceau de tube d'echangeur de chaleur, echangeur de chaleur comprenant un tel faisceau et procede de fabrication d'une plaque d'un tube d'echangeur de chaleur
CN104350349B (zh) * 2012-05-22 2017-12-05 法雷奥热系统公司 热交换器管、热交换器管束、包括该束的热交换器以及制造热交换器管的板的方法
US9927182B2 (en) 2012-05-22 2018-03-27 Valeo Systemes Thermiques Heat exchanger tube, heat exchanger tube bundle, heat exchanger comprising such a bundle and method for producing a plate of a heat exchanger tube
EP3819576A1 (de) * 2019-11-05 2021-05-12 Sanhua (Hangzhou) Micro Channel Heat Exchanger Co. Ltd Wärmetauscherrohr und wärmetauscher damit

Also Published As

Publication number Publication date
US20040206481A1 (en) 2004-10-21
JP2004263997A (ja) 2004-09-24

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