WO1999016920A1 - Echangeur de chaleur - Google Patents

Echangeur de chaleur Download PDF

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Publication number
WO1999016920A1
WO1999016920A1 PCT/JP1998/004375 JP9804375W WO9916920A1 WO 1999016920 A1 WO1999016920 A1 WO 1999016920A1 JP 9804375 W JP9804375 W JP 9804375W WO 9916920 A1 WO9916920 A1 WO 9916920A1
Authority
WO
WIPO (PCT)
Prior art keywords
tube
heat exchanger
tubes
corrosion
alloy
Prior art date
Application number
PCT/JP1998/004375
Other languages
English (en)
Japanese (ja)
Inventor
Soichi Kato
Muneo Sakurada
Shin Kurihara
Sadao Haiya
Takashi Sugita
Shoji Akiyama
Takahumi Umehara
Original Assignee
Zexel Corporation
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 Corporation filed Critical Zexel Corporation
Priority to EP98944299A priority Critical patent/EP1028170A4/fr
Publication of WO1999016920A1 publication Critical patent/WO1999016920A1/fr

Links

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
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F28F19/02—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings
    • F28F19/06—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings of metal
    • 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

Definitions

  • the present invention relates to a heat exchanger used for a refrigeration cycle, and more particularly, to a heat exchanger in which the tubes of the heat exchanger have improved corrosion resistance.
  • a plurality of tubes and fins are alternately laminated, and both ends of these laminated tubes are inserted into the insertion holes provided in the left and right header pipes and joined. Have been.
  • a partition plate for partitioning the header pipe in the longitudinal direction is provided at required positions of these header hypes.
  • the header pipe is divided in the longitudinal direction, and the header pipe has an inlet joint and an outlet joint.
  • the structure has a structure in which the heat exchange medium is meandered several times and flows between them.
  • the tubes through which the heat exchange medium flows are described in JP-A-62-97776 and JP-A-2-138455.
  • a commonly used tube material is, for example, extrusion molding using an improved material in which Cu is added to JISA150 (99.0 wt% A1). Tubes formed by shaping are known.
  • the fin is formed using a fin material in which a material that is an improved material obtained by adding Zn to an A1-Si based alloy is clad. ing.
  • Zn is thermally sprayed on the surface of the extruded tube in order to improve corrosion resistance.
  • the potential on the tube surface is higher than that on the core material A 1.
  • the base Zn layer is preferentially sacrificed and corroded, forming a protective layer of zinc rust ⁇ Zn ⁇ + Zn (OH) 2 ⁇ , which protects the core A1 alloy.
  • the thermal spraying of the tube surface is performed, for example, by providing a predetermined space between the thermal spray guns 19 arranged above and below, as in the method described in JP-A-2-1384855 shown in FIG.
  • the tubes 20 that are extruded horizontally are arranged side by side, and pulled out horizontally using a blur (a jig that grabs the ends of the tubes and pulls them), and the extrusion speed of the tubes
  • a steady speed approximately 50 mZ
  • the spray guns 19 placed above and below the tube 20 were actuated, and the metal Z from above and below the tube 20 was activated.
  • n is continuously sprayed, and Zn of 3 to 30 g Zm 2 is uniformly applied to the upper and lower flat surfaces of the tube.
  • Tubes other than the extruded tube are generally made of a material such as JISA300 (A1-ln-based) alloy and Zn added to the outer layer of the tube.
  • a tube is formed by roll forming or breath forming using a brazing sheet coated with a filter material of an improved Si-based material.
  • the tube is prevented from being corroded by making the potential of the tube noble and preferentially sacrificing and protecting the fin and the tube surface.
  • moisture, impurities, and the like easily accumulate in the bead portion formed on the surface, The corrosion of the tube progresses due to the moisture and the like, so it is necessary to improve the corrosion resistance of the tube itself.
  • an object of the present invention is to provide a heat exchanger in which the corrosion resistance of the tube itself is improved. Disclosure of the invention
  • the present invention provides a heat exchanger in which tubes and fins are alternately laminated, and the ends of the tubes are inserted and connected to a header pipe.
  • the tube is formed by roll forming or press forming using a plate-like tube material.
  • the tube material of the tube is A1-Mn-based aluminum alloy as the core material, and A1-Zn-based aluminum alloy that does not contain Si is clad in the outer layer of the tube.
  • This is a heat exchanger with a tube formed by using a heat exchanger.
  • the tube is formed using a brazing sheet clad with an A1-Zn-based aluminum alloy that does not contain Si uniformly on the outer layer of the tube.
  • the potential difference between the clad material and the core material A1-Mn-based aluminum alloy makes the potential of the core material noble, and the sacrificial anode effect of the clad material makes the core material noble.
  • the outside Since the cladding material as a layer is sacrificed uniformly on the surface, the pitting resistance of the tube itself can be improved.
  • FIG. 4 is a front view of a heat exchanger according to a specific example of the present invention.
  • FIG. 3 is a perspective view of a tube edge according to a specific example of the present invention.
  • FIG. 4 is a view showing a result of measuring a corrosion depth from the surface of each tube in a corrosion resistance test according to a specific example of the present invention.
  • FIG. 3 is a perspective view of a tube edge according to a specific example of the present invention.
  • FIG. 7 is a schematic view showing a state in which Zn is sprayed on an extruded flat tube according to a conventional example.
  • the heat exchanger 1 has a plurality of tubes 2, 2 laminated via fins 3, 3. Each end of the plurality of tubes 2 is described later. It is formed on a substantially flat surface and is inserted into a tube insertion hole 7 provided in the header pipe 4. The upper and lower openings of the header pipe 4 are closed by caps 8, and a partition plate 9 is provided at a predetermined position of each header pipe 4. ing. Further, the header pipe 4 is provided with an inlet joint 10 and an outlet joint 11, and the heat exchange medium is meandered and flows between the inlet and outlet joints 10 and 11 a plurality of times. In addition, in FIG. 1, 12 indicates side plates arranged above and below the laminated tube 2. c FIG.
  • the tube 2 shows an end of the tube 2 manufactured by molding a single plate. It is the perspective view seen from the edge. As shown in FIG. 2, the tube 2 is formed in an elliptical shape having a substantially horizontal cross-sectional shape and a parallel portion, and a long groove-shaped bead 14 protruding in the pipe direction is formed on the tube. A plurality of flow paths 18a, 18a are formed in the two tubes by the beads 14 provided.
  • Such a tube 2 is made of an Al—Mn-based alloy or the like as a core material, and is coated on an outer layer of the tube with an A1-Zn-based alloy It is manufactured by forming and processing a plate, which is a blazing sheet, in which the inner layer of the tube is coated with aluminum material such as A1—Si alloy. Jing sheet is excellent in thermal conductivity, moldability and brazing properties. That is, beads 14 and 14 of a predetermined shape, bent portions 15 and joint portions 16 and 16 are formed on this plate by roll forming or breath forming, and further bent. The plate is bent around the bent portion 15 of the plate by a roll and a mold roll so that the joined portions 16 and 16 are overlapped, and then, according to the size of the heat exchanger. These steps are performed continuously and at a high speed and automated.
  • the tube material of the tube has a three-layer structure in which the material to be the inner layer of the tube is clad, and the material to be the layer to be the inner surface of the tube is a clad material. Some have a two-layer structure that is not mounted. If the tube material has a three-layer structure, the tube is formed by bending and joining a single plate, or two tubes. The rate is formed by overlapping. When the tube has a two-layer structure, as described later, an inner fin in which a filler material is clad is inserted into the inside of the tube, and the tube and the inner member are made of the filler material. The female fin is joined.
  • a brazing sheet in which a plate made of a predetermined aluminum alloy as a core material is coated with a conventional brazing material, or a brazing sheet in which the cladding material of the present example is coated is used.
  • the corrosion resistance test performed using a tube formed by spraying and a tube sprayed with Zn on an extruded tube will be described with reference to the drawings.
  • Fig. 5 shows the results of a CASS test performed using a tube formed in the following manner .: In the CASS test, corrosion was accelerated by spraying a predetermined corrosive solution for a predetermined time, and then corrosion from the tube surface was started. This test measures the corrosion resistance by measuring the depth.
  • A is a JISA300 alloy containing Cu and Mn as the core material, and A1—Si—Zn alloy (Si is 7.5% and Zn is 1% ) Shows the test results of the tube formed by roll forming or breath forming using the brazinder sheet coated with the nodular material: 8 in the figure includes 11 and 11 described above.
  • a tube formed using a brazing sheet coated with a 300-based alloy as the core material and a JISA 702 alloy (A1-Zn-based) as the clad material The test results are shown.
  • C is a JISA 703 alloy (A 1 — Z) similar to B, with the core used is the commonly used JISA 300 alloy (A 1 — Fe — M n system).
  • the test results of a tube formed using a brazing sheet coated with (n-type) as a cladding material are shown.
  • T indicates JISA150 (99.0 wt% A1) Formed by extrusion molding method using the added additive
  • the test result of the tube which performed Zn spraying on the tube is shown.
  • the tube A formed from the brazing sheet coated with the A1—Si1Zn-type filler material has a pitting depth.
  • the pit depth is about 70 ⁇ m in B in the figure, while it reaches 250 ⁇ m, indicating that the corrosion resistance is improved.
  • a brazing sheet coated with a cladding material of A1—Zn-based alloy that does not contain Si, as in tube B is used as the core material of commonly used JISA303 alloy.
  • the pit depth was about 1 ⁇ m ⁇ also in the tube C formed from, and it was confirmed that the corrosion resistance was improved as compared with the tube indicated by ⁇ in the figure.
  • the corrosion depth reaches 150 ⁇ , and does not include S i shown by ⁇ and C in the figure It can be confirmed that the corrosion resistance is lower than that of a tube formed using a brazing sheet coated with a cladding material of A1-Zn alloy.
  • a tube formed by rolling or breathing a brazing sheet coated with a clad material which is an A1-Zn-based alloy containing no Si, is used. It has higher corrosion resistance than the tube formed from the brazing sheet coated with the conventional A1-Si-Zn filter media, and is extruded from JISA150 alloy. Later, it was confirmed that the corrosion depth was smaller and the pitting resistance was improved as compared with the Zn sprayed tube.
  • a tube manufactured using a single plate is used.
  • experiments were conducted on this example the present invention is not limited to this example.
  • a tube formed by laminating two plates or a heat exchanger provided with an inner-fin type tube may be used. Can be.
  • FIG. 4 is a perspective view of the tube 21 of the inner fin type viewed from the edge.
  • the inner fin type tube 21 is formed by bending a plate of a predetermined size to form a tube body 24 having an oval cross section.
  • An inner fin 23 that divides the internal flow passage 22 into a plurality of flow passages 22 a is installed.
  • the inner fin 23 has a brazing material applied to a predetermined brate, and the brazing sheet used for the inner fin tube 21 is A 1 — A plate that is a brazing sheet in which the A 1 —Zn-based alloy cladding material is coated on the outer layer of the tube, as described above, using a base alloy as the core material. It is manufactured by using and molding.
  • the tube material of the tube 21 has a two-layer structure in which the filler material for the inner surface of the tube is not clad.
  • the filler material is applied to the inner fins 23. Therefore, the tube 21 and the inner fin 23 are securely joined.
  • a plate that is a brass-jinda sheet coated on the outer layer with an Al_Zn-based alloy cladding material as described above the corrosion resistance of the tube itself is improved. Can be improved.
  • the tube using a brazing sheet in which the surface of the A 1 —Zn-based alloy cladding material is uniformly coated on the surface to be the outer layer of the tube, the core material and the surface layer are formed.
  • the potential difference of the core material becomes noble due to the potential difference of the cladding material at the time, and the surface of the cladding material becomes uniform. Due to the sacrificial anode effect, the corrosion resistance of the tube itself can be improved.
  • the present invention can improve the pitting corrosion resistance of a tube, and is therefore suitable for use under severe conditions, for example, a refrigeration cycle for automobiles.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Laminated Bodies (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Coating By Spraying Or Casting (AREA)

Abstract

L'invention concerne un échangeur de chaleur (1) dont la fabrication consiste à disposer en couches alternées des tubes (2) et des nervures (3), et à relier par insertion des parties d'extrémité des tubes à des conduits collecteurs (4). Les tubes (2) sont constitués par des matériaux pour tubes de type tôles, obtenus par laminage ou par formage sous presse, chacun des tubes comportant un élément central en alliage d'aluminium Al-Mn et une couche constituant une surface extérieure du tube (2), plaquée avec un alliage d'aluminium Al-Zn ne renfermant pas de Si, ce qui améliore la résistance du tube à la corrosion.
PCT/JP1998/004375 1997-09-30 1998-09-29 Echangeur de chaleur WO1999016920A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP98944299A EP1028170A4 (fr) 1997-09-30 1998-09-29 Echangeur de chaleur

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP9/266083 1997-09-30
JP26608397A JPH11106855A (ja) 1997-09-30 1997-09-30 熱交換器

Publications (1)

Publication Number Publication Date
WO1999016920A1 true WO1999016920A1 (fr) 1999-04-08

Family

ID=17426113

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1998/004375 WO1999016920A1 (fr) 1997-09-30 1998-09-29 Echangeur de chaleur

Country Status (3)

Country Link
EP (1) EP1028170A4 (fr)
JP (1) JPH11106855A (fr)
WO (1) WO1999016920A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001018477A1 (fr) * 1999-09-08 2001-03-15 Zexel Valeo Climate Control Corporation Echangeur de chaleur
CN104105938A (zh) * 2011-08-09 2014-10-15 丰田自动车株式会社 热交换器
US20150375345A1 (en) * 2013-03-19 2015-12-31 Hydro Aluminium Rolled Products Gmbh Method for producing a roll-clad aluminum workpiece, roll-clad aluminum workpiece, and use therefor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6329924B2 (ja) * 2015-06-19 2018-05-23 三菱アルミニウム株式会社 熱交換器用アルミニウム合金管および熱交換器コア

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56127767A (en) * 1980-03-12 1981-10-06 Sumitomo Light Metal Ind Ltd Production of corrosion-resistant aluminum pipe
JPS6297766A (ja) 1985-10-24 1987-05-07 Showa Alum Corp アルミニウム製熱交換器の製造方法
JPS644449A (en) * 1987-06-26 1989-01-09 Calsonic Corp Brazing sheet made of aluminum alloy
JPH0228981U (fr) * 1988-08-12 1990-02-23
JPH02138455A (ja) 1987-07-27 1990-05-28 Furukawa Alum Co Ltd 熱交換器用アルミ押出偏平多穴チューブの製造方法
JPH0545082A (ja) * 1991-08-12 1993-02-23 Showa Alum Corp 熱交換器用チユーブ

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU582139B2 (en) * 1984-03-06 1989-03-16 Furukawa Aluminum Co., Ltd. Aluminum and aluminum alloy for fin and heat exchanger using same
US4688311A (en) * 1986-03-03 1987-08-25 Modine Manufacturing Company Method of making a heat exchanger
JPH01157794A (ja) * 1987-09-09 1989-06-21 Nippon Denso Co Ltd ろう付用アルミニウム素材，その製法及びアルミニウム合金製熱交換器の製法
US5350436A (en) * 1992-11-24 1994-09-27 Kobe Alcoa Transportation Products Ltd. Aluminum alloy composite material for brazing
US5351750A (en) * 1993-03-24 1994-10-04 Valeo Engine Cooling, Inc. Tubular element for a heat exchanger
JPH08136183A (ja) * 1994-11-04 1996-05-31 Zexel Corp 積層型熱交換器
JP3276790B2 (ja) * 1994-11-11 2002-04-22 古河電気工業株式会社 アルミニウム合金ブレージングシートの製造方法、前記ブレージングシートを用いた熱交換器、および前記熱交換器の製造方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56127767A (en) * 1980-03-12 1981-10-06 Sumitomo Light Metal Ind Ltd Production of corrosion-resistant aluminum pipe
JPS6297766A (ja) 1985-10-24 1987-05-07 Showa Alum Corp アルミニウム製熱交換器の製造方法
JPS644449A (en) * 1987-06-26 1989-01-09 Calsonic Corp Brazing sheet made of aluminum alloy
JPH02138455A (ja) 1987-07-27 1990-05-28 Furukawa Alum Co Ltd 熱交換器用アルミ押出偏平多穴チューブの製造方法
JPH0228981U (fr) * 1988-08-12 1990-02-23
JPH0545082A (ja) * 1991-08-12 1993-02-23 Showa Alum Corp 熱交換器用チユーブ

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP1028170A4 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001018477A1 (fr) * 1999-09-08 2001-03-15 Zexel Valeo Climate Control Corporation Echangeur de chaleur
CN104105938A (zh) * 2011-08-09 2014-10-15 丰田自动车株式会社 热交换器
US20150375345A1 (en) * 2013-03-19 2015-12-31 Hydro Aluminium Rolled Products Gmbh Method for producing a roll-clad aluminum workpiece, roll-clad aluminum workpiece, and use therefor
US10065271B2 (en) * 2013-03-19 2018-09-04 Hydro Aluminium Rolled Products Gmbh Method for producing a roll-clad aluminum workpiece, roll-clad aluminum workpiece, and use therefor

Also Published As

Publication number Publication date
JPH11106855A (ja) 1999-04-20
EP1028170A4 (fr) 2002-06-19
EP1028170A1 (fr) 2000-08-16

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