JP2007120888A - Tube for heat exchanger and its manufacturing method - Google Patents

Tube for heat exchanger and its manufacturing method Download PDF

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Publication number
JP2007120888A
JP2007120888A JP2005315213A JP2005315213A JP2007120888A JP 2007120888 A JP2007120888 A JP 2007120888A JP 2005315213 A JP2005315213 A JP 2005315213A JP 2005315213 A JP2005315213 A JP 2005315213A JP 2007120888 A JP2007120888 A JP 2007120888A
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Japan
Prior art keywords
tube
end portion
heat exchanger
inner fin
caulking
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JP2005315213A
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Japanese (ja)
Inventor
Tomonori Inoue
智紀 井上
Kazuhiro Mitsukawa
一浩 光川
Katsuji Hattori
克二 服部
Kenji Maeda
研二 前田
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Denso Corp
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Denso Corp
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Publication date
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Priority to JP2005315213A priority Critical patent/JP2007120888A/en
Priority to DE102006050319A priority patent/DE102006050319A1/en
Priority to US11/586,116 priority patent/US20070095514A1/en
Priority to FR0609525A priority patent/FR2896864A1/en
Publication of JP2007120888A publication Critical patent/JP2007120888A/en
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/151—Making tubes with multiple passages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/22—Making finned or ribbed tubes by fixing strip or like material to tubes
    • B21C37/225—Making finned or ribbed tubes by fixing strip or like material to tubes longitudinally-ribbed tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B21D53/08—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of both metal tubes and sheet metal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00—Rigid pipes
    • F16L9/17—Rigid pipes obtained by bending a sheet longitudinally and connecting the edges
    • 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
    • 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
    • F28F1/40—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
    • 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
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00—Evaporators; Condensers
    • F25B39/02—Evaporators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
    • F28F13/12—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2225/00—Reinforcing means
    • F28F2225/04—Reinforcing means for 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
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding

Landscapes

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

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tube for a heat exchanger and its manufacturing method capable of preventing displacement of an inner fin and providing proper caulking by the tube. <P>SOLUTION: In this tube for the heat exchanger comprising the tube 11 wherein a first end portion 11c1 of two end portions of two plate portions 11b opposite to each other, is wound and caulked in a state of being wrapped with a second end portion 11c2, and the fin 12 disposed in the tube 11 in such a state that one of end portions 12c is held between the first end portion 11c1 and the second end portion 11c2, one of end portions 12c is provided with a bent portion 12c1 bent into the L-shape and positioned on the first end portion 11c1. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、例えば蒸発器等の熱交換器に用いて好適な熱交換器用チューブおよその製造方法に関するものである。   The present invention relates to a method for manufacturing approximately a heat exchanger tube suitable for use in a heat exchanger such as an evaporator.

従来の熱交換器用のインナーフィンチューブとして、例えば特許文献１に示されるものが知られている。このインナーフィンチューブは、帯状板材の折り曲げによって形成される扁平状断面の一端側に屈曲部、他端側にかしめ部を有するチューブの内部に、同様に帯状板材から波状に形成されるインナーフィンが配設されたものであって、インナーフィンの一端側がチューブの屈曲部の内壁に接触した状態で、他端側がチューブのかしめ部にかしめられるようになっている。   As a conventional inner fin tube for a heat exchanger, for example, the one shown in Patent Document 1 is known. This inner fin tube has an inner fin formed in a wave-like shape from the strip-like plate material in the tube having a bent portion at one end of the flat cross section formed by bending the strip-like plate material and a crimped portion at the other end side. In the state where one end side of the inner fin is in contact with the inner wall of the bent portion of the tube, the other end side is caulked to the caulking portion of the tube.

これにより、チューブに対するインナーフィンの位置ずれ、飛び出し等を確実に防止でき、チューブとしての不良率を低減できるとしている。また、インナーフィンの位置ずれ、飛び出し等の防止ができることから、ローラ成形機を用いて連続的にチューブおよびインナーフィンを製造しながら、インナーフィンをチューブ内に連続的に挿入することができ、ひいてはインナーフィンチューブの高速連続成形が可能であるとしている（特許文献１中の図３、図４）。
特開２００３−３３６９８９号公報 Thereby, the position shift of the inner fin with respect to the tube, the jump-out, etc. can be reliably prevented, and the defect rate as a tube can be reduced. In addition, since the inner fin can be prevented from being displaced and popped out, the inner fin can be continuously inserted into the tube while manufacturing the tube and the inner fin continuously using a roller molding machine. The inner fin tube can be continuously formed at a high speed (FIGS. 3 and 4 in Patent Document 1).
JP 2003-336989 A

しかしながら、インナーフィンをチューブ内に挿入して、インナーフィンの他端側をチューブのかしめ部にかしめる際に、インナーフィンの波状部が縮むことによって、チューブに対するインナーフィンの位置ずれが生じ易いという問題点があった。   However, when the inner fin is inserted into the tube and the other end of the inner fin is caulked to the caulking portion of the tube, the inner fin is liable to be displaced with respect to the tube due to the undulation of the inner fin. There was a problem.

また、インナーフィンの位置ずれによって、かしめ形状が安定しないという問題があった。   In addition, there is a problem that the caulking shape is not stable due to the displacement of the inner fin.

さらに、インナーフィンの位置ずれによってチューブの両側の側壁とインナーフィンとの接合位置がずれるという問題点があった。   Furthermore, there has been a problem that the joining position of the inner fin and the side wall on both sides of the tube is shifted due to the displacement of the inner fin.

本発明の目的は、上記問題に鑑み、インナーフィンの位置ずれを防止することにある。   In view of the above problems, an object of the present invention is to prevent displacement of the inner fin.

本発明のひとつの目的は、インナーフィンの位置ずれが抑制された熱交換器用チューブを提供することにある。   One object of the present invention is to provide a heat exchanger tube in which the displacement of the inner fins is suppressed.

本発明の他のひとつの目的は、インナーフィンの位置ずれを抑制できる熱交換器用チューブの製造方法を提供することにある。   Another object of the present invention is to provide a method of manufacturing a heat exchanger tube that can suppress the displacement of the inner fin.

本発明のさらに他の目的は、チューブによる良好なかしめが可能となる熱交換器用チューブおよびその製造方法を提供することにある。   Still another object of the present invention is to provide a heat exchanger tube and a method for manufacturing the heat exchanger tube that enable good caulking with the tube.

本発明は上記目的を達成するために、以下の技術的手段を採用する。   In order to achieve the above object, the present invention employs the following technical means.

請求項１に記載の発明では、互いに対向する２つの板部（１１ｂ）の２つの端部のうち、第１端部（１１ｃ１）が第２端部（１１ｃ２）で包まれるように巻きかしめされたチューブ（１１）と、このチューブ（１１）内に配置され、一方の端部（１２ｃ）が第１端部（１１ｃ１）および第２端部（１１ｃ２）の間に挟みこまれて固定されたフィン（１２）とを備える熱交換器用チューブにおいて、一方の端部（１２ｃ）には、Ｌ字状に折り曲げられて、第１端部（１１ｃ１）に位置決めされる曲げ部（１２ｃ１）が形成されたことを特徴としている。   In the first aspect of the present invention, the first end portion (11c1) of the two end portions of the two plate portions (11b) facing each other is wound so as to be wrapped by the second end portion (11c2). The tube (11) and the one end (12c) are sandwiched between the first end (11c1) and the second end (11c2) and fixed in the tube (11). In a heat exchanger tube including a fin (12), a bent portion (12c1) is formed at one end (12c) by being bent into an L shape and positioned at a first end (11c1). It is characterized by that.

これにより、フィン（１２）をチューブ（１１）に挿入して巻きかしめを行う際に、曲げ部（１２ｃ１）が第１端部（１１ｃ１）の先端部に当接して位置決めされて、チューブ（１１）に対するフィン（１２）の位置ずれを防止することができるので、巻きかしめにおける第２端部（１１ｃ２）の曲げ位置を安定させて、かしめ形状の安定した熱交換器用チューブ（１０）とすることができる。   Thus, when the fin (12) is inserted into the tube (11) and crimped, the bent portion (12c1) is positioned in contact with the tip of the first end (11c1), and the tube (11 ), The bending position of the second end (11c2) in the caulking is stabilized, and the heat exchanger tube (10) having a stable caulking shape is obtained. Can do.

請求項２に記載の発明では、チューブ（１１）において板部（１１ｂ）の他端側が屈曲部（１１ａ）により接続されていることを特徴としている。   The invention according to claim 2 is characterized in that in the tube (11), the other end side of the plate portion (11b) is connected by the bent portion (11a).

これにより、容易にチューブ（１１）を形成できると共に、内部を流通する流体の圧力に対して強度的に優れるチューブ（１１）とすることができる。   Thereby, while being able to form a tube (11) easily, it can be set as the tube (11) excellent in intensity | strength with respect to the pressure of the fluid which distribute | circulates an inside.

請求項３に記載の発明では、曲げ部（１２ｃ１）の長さは、第１端部（１１ｃ１）の厚さと同等またはそれ以下であることを特徴としている。   The invention according to claim 3 is characterized in that the length of the bent portion (12c1) is equal to or less than the thickness of the first end portion (11c1).

これにより、曲げ部（１２ｃ１）が、巻きかしめによりかしめられる第２端部（１１ｃ２）に干渉することなく、第１端部（１１ｃ１）に確実に位置決めされて、チューブ（１１）に対するフィン（１２）の位置ずれ防止効果を高めることができる。   Accordingly, the bent portion (12c1) is reliably positioned at the first end portion (11c1) without interfering with the second end portion (11c2) caulked by winding and caulking, and the fin (12 ) Can be enhanced.

請求項４に記載の発明では、熱交換器において、請求項１〜請求項３のいずれか１つに記載の熱交換器用チューブ（１０）を用いたことを特徴としている。   The invention according to claim 4 is characterized in that in the heat exchanger, the heat exchanger tube (10) according to any one of claims 1 to 3 is used.

上記のように熱交換器用チューブ（１０）のかしめ形状が安定することで、その外形ラインが安定したものとなる。よって、このチューブ（１０）を用いた熱交換器（２０）においては、ヘッダタンク（２３、２４）にチューブ（１０）を接合する時の両者の隙間関係を安定させて、確実な接合が可能となる。熱交換器（２０）においては、ヘッダタンク（２３、２４）とチューブ（１０）間においては、内部流体の漏れが生じないようにすることが重要であり、上記より漏れに対して信頼性の高い熱交換器（２０）とすることができる。   As described above, the caulking shape of the heat exchanger tube (10) is stabilized, so that the outer shape line is stabilized. Therefore, in the heat exchanger (20) using the tube (10), the gap relationship between the two when the tube (10) is joined to the header tanks (23, 24) is stabilized and reliable joining is possible. It becomes. In the heat exchanger (20), it is important to prevent leakage of internal fluid between the header tanks (23, 24) and the tube (10). It can be a high heat exchanger (20).

請求項５に記載の発明は、熱交換器用チューブの製造方法に関するものであり、２つの板部（１１ｂ）を対向させて配置するチューブ外皮成形工程と、板材製のフィン（１２）を２つの板部（１１ｂ）の間に挿入配置する挿入工程と、挿入工程の終了後に、ひとつの板部（１１ｂ）の端部である第１端部（１１ｃ１）と、他の板部（１１ｂ）の端部である第２端部（１１ｃ２）との間にフィン（１２）の端部（１２ｃ）を位置させ、フィン（１２）の端部（１２ｃ）の先端に設けられた曲げ部（１２ｃ１）を第１端部（１１ｃ１）に係止させながら、第２端部（１１ｃ２）を第１端部（１１ｃ１）に巻きかしめするかしめ工程とを有することを特徴としている。   The invention according to claim 5 relates to a method of manufacturing a heat exchanger tube, and includes a tube skin forming step in which two plate portions (11b) are arranged to face each other, and two fins (12) made of a plate material. An insertion step of inserting and arranging between the plate portions (11b), and after the insertion step, the first end portion (11c1) which is an end portion of one plate portion (11b) and the other plate portion (11b) The end (12c) of the fin (12) is positioned between the second end (11c2), which is the end, and the bent portion (12c1) provided at the tip of the end (12c) of the fin (12) And a caulking step of winding and caulking the second end portion (11c2) around the first end portion (11c1) while engaging the first end portion (11c1).

これにより、かしめ工程において、曲げ部（１２ｃ１）が第１端部（１１ｃ１）に係止されて、チューブ（１１）に対してフィン（１２）の位置がずれるのを防止できる。   Thereby, in a caulking process, a bending part (12c1) can be latched by the 1st end part (11c1), and it can prevent that a position of a fin (12) shifts to a tube (11).

請求項６に記載の発明では、請求項５に記載の発明に対して、挿入工程の前に、フィン（１２）の端部（１２ｃ）の先端に曲げ部（１２ｃ１）を形成する工程を、さらに有することを特徴としている。   In the invention of claim 6, in contrast to the invention of claim 5, the step of forming the bent portion (12c1) at the tip of the end portion (12c) of the fin (12) before the inserting step, Furthermore, it is characterized by having.

これにより、予め曲げ部（１２ｃ１）が形成されたフィン（１２）をチューブ（１１）に挿入することができるので、挿入工程においてチューブ（１１）に対してフィン（１２）の位置がずれるのを防止でき、引き続き上記かしめ工程における位置ずれ防止が可能となる。   Thereby, since the fin (12) in which the bending portion (12c1) is formed in advance can be inserted into the tube (11), the position of the fin (12) is shifted with respect to the tube (11) in the insertion step. Therefore, it is possible to prevent misalignment in the caulking process.

請求項７に記載の発明では、請求項５に記載の発明に対して、かしめ工程において、第２端部（１１ｃ２）を巻きかしめしながら、端部（１２ｃ）の先端に曲げ部（１２ｃ１）を形成することを特徴としており、これにより、請求項５に記載の発明と同様の効果を得ることができる。   In the invention of claim 7, in contrast to the invention of claim 5, in the caulking step, the bent portion (12c1) is formed at the tip of the end portion (12c) while the second end portion (11c2) is wound and caulked. Thus, the same effect as that of the fifth aspect of the invention can be obtained.

請求項５〜請求項７に記載の発明に対して、請求項８に記載の発明のように、かしめ工程の終了後に、チューブ（１１）の長手方向寸法を所定寸法に切断する切断工程をさらに備えるようにすれば、連続的な熱交換器用チューブ（１０）の製造が可能となる。   In contrast to the inventions according to claims 5 to 7, as in the invention according to claim 8, there is further provided a cutting step of cutting the longitudinal dimension of the tube (11) into a predetermined dimension after the caulking step. If it prepares, manufacture of the tube (10) for continuous heat exchangers will be attained.

また、請求項９に記載の発明のように、チューブ外皮成形工程は、板材を折り曲げて屈曲部（１１ａ）および２つの板部（１１ｂ）を形成する工程とすることができる。   Further, as in the invention described in claim 9, the tube skin forming step can be a step of bending the plate material to form the bent portion (11a) and the two plate portions (11b).

尚、上記各手段の括弧内の符号は、後述する実施形態記載の具体的手段との対応関係を示すものである。   In addition, the code | symbol in the bracket | parenthesis of each said means shows a corresponding relationship with the specific means of embodiment description mentioned later.

（第１実施形態）
本発明の第１実施形態における熱交換器用チューブとしてのインナーフィンチューブ１０について、図１、図２を用いて説明する。尚、図１はインナーフィンチューブ１０の長手方向に直交する流路断面を示す断面図、図２は図１におけるＡ部を示す拡大図である。 (First embodiment)
An inner fin tube 10 as a heat exchanger tube in the first embodiment of the present invention will be described with reference to FIGS. 1 and 2. 1 is a cross-sectional view showing a cross section of the flow path orthogonal to the longitudinal direction of the inner fin tube 10, and FIG. 2 is an enlarged view showing a portion A in FIG.

インナーフィンチューブ１０は、チューブ１１内にインナーフィン１２が挿入されて形成されており、例えば、冷凍サイクル装置内に配設される蒸発器等の熱交換器用チューブとして使用される。   The inner fin tube 10 is formed by inserting an inner fin 12 into a tube 11 and is used as, for example, a heat exchanger tube such as an evaporator disposed in a refrigeration cycle apparatus.

チューブ１１は、薄肉のアルミニウム製帯状板材からの折り曲げ加工によって、長手方向に直交する流路断面が扁平状に形成された管部材である。更に具体的には、帯状板材の幅方向の略中央部を折り曲げることで屈曲部１１ａを形成している。屈曲部１１ａは、円弧状に形成される。屈曲部１１ａは、後述する２つの平板部１１ｂの間隔を直径とする円の一部に対応する形状をもつことができる。屈曲部１１ａは、Ｖ字型、ブラケット型などにすることもできる。   The tube 11 is a tube member in which a flow path cross section perpendicular to the longitudinal direction is formed in a flat shape by bending from a thin aluminum strip. More specifically, the bent portion 11a is formed by bending a substantially central portion in the width direction of the belt-shaped plate material. The bent portion 11a is formed in an arc shape. The bent portion 11a can have a shape corresponding to a part of a circle whose diameter is a distance between two flat plate portions 11b described later. The bent portion 11a can be V-shaped, bracket-shaped, or the like.

この屈曲部１１ａから対向し合うように２つの板部としての平板部１１ｂが延びている。２つの平板部１１ｂのそれぞれの端部（一端側）には、２つの平板部１１ｂの中央に向かってＶ字状に配置された斜面部１１ｃ３、１１ｃ４が設けられている。これら２つの斜面部１１ｃ３、１１ｃ４のさらに先端には、第１端部１１ｃ１と第２端部１１ｃ２とが設けられている。これら第１端部１１ｃ１と第２端部１１ｃ２とは巻きかしめされている。第２端部１１ｃ２は、第１端部１１ｃ１よりも長く、倍以上の長さをもつ。第２端部１１ｃ２は、第１端部１１ｃ１の内面側に沿って平行に延びる部位と、第１端部１１ｃ１の先端縁を包み込むように巻きつけられた屈曲部と、第１端部１１ｃ１の外面側に沿って平行に延びる部位とを有する。第２端部１１ｃ２の先端は、第１端部１１ｃ１と斜面部１１ｃ３との境界付近にまで達している。   A flat plate portion 11b as two plate portions extends from the bent portion 11a so as to face each other. Slope portions 11c3 and 11c4 arranged in a V shape toward the center of the two flat plate portions 11b are provided at the respective end portions (one end side) of the two flat plate portions 11b. A first end portion 11c1 and a second end portion 11c2 are provided at the distal ends of the two slope portions 11c3 and 11c4. The first end portion 11c1 and the second end portion 11c2 are coiled. The second end portion 11c2 is longer than the first end portion 11c1 and has a length more than doubled. The second end portion 11c2 includes a portion that extends in parallel along the inner surface side of the first end portion 11c1, a bent portion that is wrapped so as to wrap around the tip edge of the first end portion 11c1, and the first end portion 11c1. And a portion extending in parallel along the outer surface side. The tip of the second end portion 11c2 reaches the vicinity of the boundary between the first end portion 11c1 and the slope portion 11c3.

この構成では、平板部１１ｂの端部同士、即ち、第１端部１１ｃ１と第２端部１１ｃ２とを巻きかしめして、かしめ部１１ｃを設けることで、チューブ１１は形成されている。尚、巻きかしめというのは、第２端部１１ｃ２が第１端部１１ｃ１を包み込むようにして、端部がかしめされるものである。この実施形態では、平板状の第１端部１１ｃ１の両面を包み込むようにして、第２端部１１ｃ２が第１端部１１ｃ１に巻きつけられている。この実施形態では、平板状の巻きかしめ部が形成されている。巻きかしめ部は、斜面部１１ｃ３、１１ｃ４から、ほぼ平板部１１ｂの間隔に相当する長さ伸び出している。   In this configuration, the tube 11 is formed by winding and crimping the end portions of the flat plate portion 11b, that is, the first end portion 11c1 and the second end portion 11c2, and providing the caulking portion 11c. Note that the winding caulking means that the end is caulked so that the second end 11c2 wraps around the first end 11c1. In this embodiment, the second end portion 11c2 is wound around the first end portion 11c1 so as to wrap both surfaces of the flat plate-like first end portion 11c1. In this embodiment, a plate-like winding and caulking portion is formed. The winding and caulking portion extends from the slope portions 11c3 and 11c4 to a length substantially corresponding to the interval between the flat plate portions 11b.

インナーフィン１２は、チューブ１１内を流通する流体に乱流効果を与えつつ、伝熱面積を増大させるフィン部材である。インナーフィン１２は、チューブ１１と同様に薄肉の（チューブ１１よりも薄い）アルミニウム製帯状板材からのローラ加工によって、帯状板材の幅方向の中間部に波状となる波状部１２ａが形成されている。また、インナーフィン１２の幅方向の両端部側には、この幅方向に沿って平板状となる平板部１２ｂ、１２ｃが形成されており、インナーフィン１２がチューブ１１内に挿入される際に、一方の平板部１２ｂがチューブ１１の屈曲部１１ａ内壁に当接している。更に、他方の平板部（本発明における一方の端部に対応）１２ｃがチューブ１１の第１端部１１ｃ１と第２端部１１ｃ２とに挟まれた状態でかしめられている。   The inner fin 12 is a fin member that increases the heat transfer area while giving a turbulent flow effect to the fluid flowing through the tube 11. Like the tube 11, the inner fin 12 is formed with a corrugated portion 12a having a corrugated shape in the middle in the width direction of the strip-shaped plate material by roller processing from a thin-walled aluminum strip-shaped plate material (thinner than the tube 11). In addition, flat plate portions 12b and 12c that are flat along the width direction are formed on both end sides in the width direction of the inner fin 12, and when the inner fin 12 is inserted into the tube 11, One flat plate portion 12 b is in contact with the inner wall of the bent portion 11 a of the tube 11. Further, the other flat plate portion (corresponding to one end portion in the present invention) 12c is caulked while being sandwiched between the first end portion 11c1 and the second end portion 11c2 of the tube 11.

そして、平板部１２ｃの先端部には、Ｌ字状に曲げられた曲げ部１２ｃ１が形成されている。この曲げ部１２ｃ１は、上記チューブ１１の第１端部１１ｃ１の先端部に位置決めされて当接している。曲げ部１２ｃ１は、第１端部１１ｃ１の先端面と平行に延びており、この先端部に引っかかる係止部を提供している。曲げ部１２ｃ１は、ろう付け工程の前において、インナーフィン１２がチューブ１１内へ移動しようとする力に抗してインナーフィン１２の位置を規定する。曲げ部１２ｃ１の長さは、第１端部１１ｃ１の厚さと同等またはそれ以下である。尚、曲げ部１２ｃ１の長さは、第１端部１１ｃ１の板厚寸法を超えない範囲で出来る限り大きく設定するのが良い。曲げ部１２ｃ１は、インナーフィン１２の長手方向の全長に渡って形成されている。曲げ部１２ｃ１は、インナーフィン１２の長手方向に断続的に部分的に形成されることができる。   And the bending part 12c1 bent in the L-shape is formed in the front-end | tip part of the flat plate part 12c. The bent portion 12c1 is positioned and in contact with the distal end portion of the first end portion 11c1 of the tube 11. The bent portion 12c1 extends in parallel with the distal end surface of the first end portion 11c1, and provides a locking portion that is caught by the distal end portion. The bent portion 12c1 defines the position of the inner fin 12 against the force that the inner fin 12 tries to move into the tube 11 before the brazing step. The length of the bent portion 12c1 is equal to or less than the thickness of the first end portion 11c1. The length of the bent portion 12c1 is preferably set as large as possible within a range not exceeding the thickness of the first end portion 11c1. The bent portion 12c1 is formed over the entire length of the inner fin 12 in the longitudinal direction. The bent portion 12 c 1 can be intermittently partially formed in the longitudinal direction of the inner fin 12.

このように形成されたインナーフィンチューブ１０は、図３に示すように、複数積層され、各インナーフィンチューブ１０の間にはインナーフィン１２と同様に波状に形成されたアウターフィン２１が介在され、コア部（熱交換部）２２として形成される。そして、各インナーフィンチューブ１０の長手方向の両端部は、第１ヘッダタンク２３、第２ヘッダタンク２４に接続されて、例えば蒸発器のような熱交換器２０として形成される。尚、インナーフィンチューブ１０の長手方向両端部は、両ヘッダタンク２３、２４に設けられたチューブ孔２３ａ（図２中の２点鎖線）に挿入され、ろう付けによって接合される。   As shown in FIG. 3, a plurality of inner fin tubes 10 formed in this manner are stacked, and outer fins 21 that are formed in a wave shape like the inner fins 12 are interposed between the inner fin tubes 10. It is formed as a core part (heat exchange part) 22. And the both ends of the longitudinal direction of each inner fin tube 10 are connected to the 1st header tank 23 and the 2nd header tank 24, and are formed as the heat exchanger 20 like an evaporator, for example. Note that both ends in the longitudinal direction of the inner fin tube 10 are inserted into tube holes 23a (two-dot chain lines in FIG. 2) provided in both header tanks 23 and 24, and are joined by brazing.

両ヘッダタンク２３、２４には、それぞれの内部に連通する流体用の流入部２５、流出部２６が接続されている。この熱交換器２０を蒸発器とした場合は、冷凍サイクル内を循環する冷媒（内部流体）が、流入部２５から第１ヘッダタンク２３に流入して、各インナーフィンチューブ１０内を流れ、第２ヘッダタンク２４で集合し、流出部２６から流出する。そして、インナーフィンチューブ１０内を流通する冷媒と、コア部２２の外部を流通する空調用空気との間で熱交換が成されて、冷媒は蒸発し、空調用空気が冷却される。   The header tanks 23 and 24 are connected to an inflow portion 25 and an outflow portion 26 for fluid communicating with each other. When the heat exchanger 20 is an evaporator, the refrigerant (internal fluid) circulating in the refrigeration cycle flows into the first header tank 23 from the inflow portion 25 and flows through the inner fin tubes 10. 2 Collects in the header tank 24 and flows out from the outflow portion 26. And heat exchange is performed between the refrigerant | coolant which distribute | circulates the inner fin tube 10, and the air-conditioning air which distribute | circulates the exterior of the core part 22, a refrigerant | coolant evaporates and air-conditioning air is cooled.

次に、上記インナーフィンチューブ１０の製造方法について、図４、図５を用いて説明する。図４はインナーフィンチューブ１０を製造するインナーフィンチューブ製造装置（以下、製造装置）１００の全体構成を示す模式図であり、図５は後述する挿入・かしめ部１１０Ｂによるかしめ工程を示す模式図である。   Next, the manufacturing method of the said inner fin tube 10 is demonstrated using FIG. 4, FIG. FIG. 4 is a schematic diagram showing an overall configuration of an inner fin tube manufacturing apparatus (hereinafter referred to as a manufacturing apparatus) 100 for manufacturing the inner fin tube 10, and FIG. 5 is a schematic diagram showing a caulking process by an insertion / caulking portion 110B described later. is there.

製造装置１００は、チューブ１１を成形すると共に、インナーフィン１２をチューブ１１内に挿入して組付けるチューブ成形部１１０と、インナーフィン１２を成形するインナーフィン成形部１２０と、成形されたインナーフィン１２をチューブ成形部１１０側に搬送するインナーフィン搬送部１３０等を有している。   The manufacturing apparatus 100 forms the tube 11, inserts the inner fin 12 into the tube 11, and assembles the tube forming portion 110, the inner fin forming portion 120 that forms the inner fin 12, and the formed inner fin 12. Has an inner fin transport section 130 and the like for transporting the tube to the tube forming section 110 side.

チューブ成形部１１０は、コイルに巻かれた帯状板材から、複数組のローラを用いて主に屈曲部１１ａおよび平板部１１ｂを成形して外皮状態のチューブ１１とするチューブ外皮成形部１１０Ａと、外皮状チューブ１１内にインナーフィン１２を挿入して、複数組のローラＲ０〜Ｒｎを用いてかしめ部１１ｃを成形する挿入・かしめ部１１０Ｂと、挿入・かしめ部１１０Ｂからの連続成形品を所定長さに切断してインナーフィンチューブ１０とする切断部１１０Ｃとを有している。各部１１０Ａ、１１０Ｂ、１１０Ｃは、直列に配設されて、図示しない送りローラ等によって各部１１０Ａ、１１０Ｂ、１１０Ｃでの成形品が搬送されて、それぞれの成形が連続的に行われるようになっている。   The tube forming part 110 includes a tube skin forming part 110A that forms a bent tube 11a and a flat plate part 11b mainly from a strip-shaped plate member wound around a coil by using a plurality of sets of rollers, and a tube 11 in an outer skin state. The inner fin 12 is inserted into the cylindrical tube 11, and an insertion / caulking portion 110B for forming the caulking portion 11c using a plurality of sets of rollers R0 to Rn, and a continuously formed product from the insertion / caulking portion 110B have a predetermined length. And a cutting portion 110 </ b> C that is cut into two to form the inner fin tube 10. Each part 110A, 110B, 110C is arrange | positioned in series, and the molded product in each part 110A, 110B, 110C is conveyed by the feed roller etc. which are not shown in figure, and each shaping | molding is performed continuously. .

上記挿入・かしめ部１１０Ｂにおける複数組のローラＲ０〜Ｒｎは、チューブ１１の加工進行方向に複数並び、それぞれがチューブ１１の第２端部１１ｃ２の外面側に当接して回転するローラとしている。各ローラＲ０〜Ｒｎの回転軸の方向は、図５中の上下方向（ローラＲ０）のもの、順次右方向に回転するように傾斜したもの、最終的に１８０度反転した方向（ローラＲｎ）のものとなっている。この複数組のローラＲ０〜Ｒｎによって、加工前のまっすぐな第２端部１１ｃ２が第１端部１１ｃ１を包むように順次曲げられていき、巻きかしめが行われるようにしている。   A plurality of sets of rollers R0 to Rn in the insertion / caulking portion 110B are a plurality of rollers arranged in the processing progress direction of the tube 11 and rotating in contact with the outer surface side of the second end portion 11c2 of the tube 11, respectively. The directions of the rotation axes of the rollers R0 to Rn are those in the vertical direction (roller R0) in FIG. 5, those that are inclined so as to sequentially rotate to the right, and those that are finally reversed 180 degrees (roller Rn). It has become a thing. By the plurality of sets of rollers R0 to Rn, the straight second end portion 11c2 before processing is sequentially bent so as to wrap around the first end portion 11c1, and the caulking is performed.

インナーフィン成形部１２０は、成形されるインナーフィン１２の位置がチューブ外皮成形部１１０Ａで成形される外皮状チューブ１１から水平方向に所定距離離れて、且つ下側となるように並列に配設されており、コイルに巻かれた帯状板材から、複数組のローラを用いて波状部１２ａと平板部１２ｂ、１２ｃとに加えて、予めＬ字状の曲げ部１２ｃ１をも成形して帯状に繋がる帯状インナーフィン１２とするものである。   The inner fin molding part 120 is arranged in parallel so that the position of the inner fin 12 to be molded is a predetermined distance in the horizontal direction from the outer tube 11 molded by the tube skin molding part 110A and on the lower side. In addition to the corrugated portion 12a and the flat plate portions 12b and 12c, a strip-shaped plate material wound around a coil is used to form an L-shaped bent portion 12c1 in advance using a plurality of sets of rollers. The inner fin 12 is used.

インナーフィン搬送部１３０は、インナーフィン成形部１２０で成形された帯状インナーフィン１２を上記挿入・かしめ部１１０Ｂに搬送するものである。   The inner fin transport unit 130 transports the belt-shaped inner fin 12 molded by the inner fin molding unit 120 to the insertion / caulking unit 110B.

上記製造装置１００において、まず、チューブ成形部１１０のチューブ外皮成形部１１０Ａで、帯状板材から外皮状のチューブ１１が成形される（チューブ外皮成形工程）。また、インナーフィン成形部１２０においては、帯状のインナーフィン１２が成形される。帯状に成形されたインナーフィン１２は、インナーフィン搬送部１３０によって、挿入・かしめ部１１０Ｂ側に搬送される。   In the manufacturing apparatus 100, first, the tube-shaped tube 11 is formed from the belt-shaped plate material in the tube-shell forming portion 110A of the tube-forming portion 110 (tube-shell forming step). Further, in the inner fin forming portion 120, the band-shaped inner fin 12 is formed. The inner fin 12 formed in a belt shape is conveyed to the insertion / caulking part 110B side by the inner fin conveying part 130.

そして、挿入・かしめ部１１０Ｂによって、帯状インナーフィン１２は外皮状チューブ１１内に挿入され（挿入工程）、第１端部１１ｃ１に第２端部１１ｃ２が巻きかしめされて、インナーフィンチューブ１０の形状となるように成形される（かしめ工程）。   The band-like inner fin 12 is inserted into the outer tube 11 by the insertion / caulking portion 110B (insertion step), and the second end 11c2 is wound and caulked to the first end portion 11c1, so that the shape of the inner fin tube 10 is obtained. (Caulking process).

ここで、挿入工程においては、帯状インナーフィン１２は、曲げ部１２ｃ１によって、外皮状チューブ１１の第１端部１１ｃ１の先端部に係止される。そして、かしめ工程において、帯状インナーフィン１２の平板部１２ｃは、第１端部１１ｃ１と第２端部１１ｃ２とによって挟み込まれ、曲げ部１２ｃ１が第１端部１１ｃ１に係止された状態を維持しつつ、複数のローラＲ０〜Ｒｎによって第２端部１１ｃ２が順次、巻きかしめされていく。よって、巻きかしめが完了した状態においても、曲げ部１２ｃ１は、第１端部１１ｃ１に係止された状態となっている。   Here, in the insertion step, the belt-like inner fin 12 is locked to the distal end portion of the first end portion 11c1 of the outer tube 11 by the bent portion 12c1. In the caulking step, the flat plate portion 12c of the belt-shaped inner fin 12 is sandwiched between the first end portion 11c1 and the second end portion 11c2, and the bent portion 12c1 is maintained in a state of being locked to the first end portion 11c1. Meanwhile, the second end portion 11c2 is sequentially caulked by the plurality of rollers R0 to Rn. Therefore, even in the state where the crimping is completed, the bent portion 12c1 is locked to the first end portion 11c1.

更に、切断部１１０Ｃによって、連続的に成形されるインナーフィンチューブ１０が所定長さに切断されていき、本来の１本ずつのインナーフィンチューブ１０として完成され、所定のエリアに整列保管される。   Further, the inner fin tube 10 that is continuously formed is cut into a predetermined length by the cutting portion 110C, and the original inner fin tube 10 is completed one by one and aligned and stored in a predetermined area.

以上のように本実施形態においては、挿入工程でインナーフィン１２をチューブ１１に挿入して、かしめ工程で巻きかしめを行う際に、曲げ部１２ｃ１が第１端部１１ｃ１の先端部に当接して位置決めされて、チューブ１１に対するインナーフィン１２の位置ずれを防止することができるので、巻きかしめにおける第２端部１１ｃ２の曲げ位置を安定させて、かしめ形状の安定したインナーフィンチューブ１０とすることができる。   As described above, in the present embodiment, when the inner fin 12 is inserted into the tube 11 in the insertion step and the caulking step is performed, the bent portion 12c1 comes into contact with the distal end portion of the first end portion 11c1. Since the inner fin 12 can be prevented from being displaced with respect to the tube 11 by being positioned, the bending position of the second end portion 11c2 in the caulking is stabilized, and the inner fin tube 10 having a stable caulking shape can be obtained. it can.

具体的には、巻きかしめの際に、第２端部１１ｃ２は、インナーフィン１２の曲げ部１２ｃ１の角部から確実に曲げられて、安定した曲げＲを形成して１８０度反転される。そして、曲げられた部位の寸法Ｌ（図２）も安定した長さとして得られる。   Specifically, at the time of winding and caulking, the second end portion 11c2 is reliably bent from the corner portion of the bent portion 12c1 of the inner fin 12 to form a stable bend R and inverted 180 degrees. And the dimension L (FIG. 2) of the bent part is also obtained as a stable length.

上記のようにインナーフィンチューブ１０のかしめ形状が安定することで、その外形ラインが安定したものとなる。よって、このインナーフィンチューブ１０を用いた熱交換器２０においては、両ヘッダタンク２３、２４にインナーフィンチューブ１０を接合する時の両者の隙間関係を安定させて、確実な接合が可能となる。   As described above, when the caulking shape of the inner fin tube 10 is stabilized, the outer shape line is stabilized. Therefore, in the heat exchanger 20 using the inner fin tube 10, the gap relationship between the two when the inner fin tube 10 is joined to both the header tanks 23 and 24 is stabilized, and reliable joining is possible.

具体的には、かしめ部１１ｃの寸法Ｌが安定することで、両ヘッダタンク２３、２４のチューブ孔２３ａ（図２中の２点鎖線）との隙間を小さくすることができ（隙間が大きくなる側にばらつくのを防止でき）、ろう付け性を向上させることができる。   Specifically, since the dimension L of the caulking portion 11c is stabilized, a gap between the header tanks 23 and 24 and the tube hole 23a (two-dot chain line in FIG. 2) can be reduced (the gap is increased). It is possible to prevent variation from occurring to the side) and to improve brazing.

熱交換器２０においては、両ヘッダタンク２３、２４とインナーフィンチューブ１０間においては、内部流体（蒸発器であれば冷媒）の漏れが生じないようにすることが重要であり、上記より漏れに対して信頼性の高い熱交換器２０とすることができる。   In the heat exchanger 20, it is important to prevent leakage of the internal fluid (refrigerant if it is an evaporator) between the header tanks 23, 24 and the inner fin tube 10, and the leakage is more difficult than the above. On the other hand, it can be set as the heat exchanger 20 with high reliability.

（第２実施形態）
本発明の第２実施形態を説明する。第２実施形態の熱交換器用チューブ１０は、図１に示された形状を有する。この第２実施形態では、図６および図７に示された製造方法により製造される。図６、図７は、第２端部１１ｃ２の巻きかしめ加工の工程を示す。図６は巻きかしめ加工の初期段階を示し、図７は巻きかしめ加工の中期段階を示す。第２実施形態は、上記第１実施形態に対して、インナーフィン１２の曲げ部１２ｃ１を、かしめ工程において、巻きかしめと同時に形成するようにしたものである。 (Second Embodiment)
A second embodiment of the present invention will be described. The tube 10 for heat exchangers of 2nd Embodiment has the shape shown by FIG. In the second embodiment, it is manufactured by the manufacturing method shown in FIGS. 6 and 7 show a process of winding and caulking the second end portion 11c2. FIG. 6 shows an initial stage of the caulking process, and FIG. 7 shows an intermediate stage of the caulking process. In the second embodiment, the bent portion 12c1 of the inner fin 12 is formed simultaneously with the winding and caulking in the caulking step, as compared with the first embodiment.

ここでは、インナーフィン成形部１２０において、帯状インナーフィン１２の平板部１２ｃに曲げ部１２ｃ１の成形を行っていない。そして、このインナーフィン１２をチューブ１１内に挿入した状態で、平板部１２ｃの先端が第１端部１１ｃ１よりも外側に積極的に突出するように設定している。突出量は、第１端部１１ｃ１の板厚寸法を超えない範囲で出来る限り大きくなる値とする。   Here, in the inner fin molding portion 120, the bent portion 12 c 1 is not molded on the flat plate portion 12 c of the strip-shaped inner fin 12. Then, in a state where the inner fin 12 is inserted into the tube 11, the front end of the flat plate portion 12c is set so as to positively protrude outward from the first end portion 11c1. The protrusion amount is a value that is as large as possible within a range that does not exceed the thickness of the first end portion 11c1.

第２実施形態においては、かしめ工程において、第２端部１１ｃ２を曲げ始める際に、第１端部１１ｃ１の先端部を起点にして、平板部１２ｃの先端部も同時に曲げられていき、曲げ部１２ｃ１が形成されていく。そして、この曲げ部１２ｃ１によってインナーフィン１２のチューブ１１に対する位置決めが成されることで、インナーフィン１２の位置ずれが防止されて、かしめ形状の安定したインナーフィンチューブ１０とすることができる。   In the second embodiment, when the second end portion 11c2 starts to be bent in the caulking step, the tip end portion of the flat plate portion 12c is also bent at the same time starting from the tip end portion of the first end portion 11c1. 12c1 is formed. Then, by positioning the inner fin 12 with respect to the tube 11 by the bent portion 12c1, it is possible to prevent the positional displacement of the inner fin 12 and to make the inner fin tube 10 having a stable caulking shape.

（その他の実施形態）
インナーフィンチューブ１０は、蒸発器に使用されるものに限らず、他の熱交換器（ラジエータ、コンデンサ、ヒータコア等）に使用されるものとしても良い。 (Other embodiments)
The inner fin tube 10 is not limited to the one used in the evaporator, but may be used in other heat exchangers (radiators, condensers, heater cores, etc.).

また、インナーフィン１２の形状は、波状部１２ａを有するものに限らず、他の形状（不連続的な凹凸や開口孔等）のものとしても良い。   Further, the shape of the inner fin 12 is not limited to the shape having the waved portion 12a, but may be other shapes (such as discontinuous irregularities and opening holes).

インナーフィンチューブの長手方向に直交する流路断面を示す断面図である。It is sectional drawing which shows the flow-path cross section orthogonal to the longitudinal direction of an inner fin tube. 図１におけるＡ部を示す拡大図である。It is an enlarged view which shows the A section in FIG. 第１実施形態の熱交換器を示す正面図である。It is a front view which shows the heat exchanger of 1st Embodiment. インナーフィンチューブを製造するインナーフィンチューブ製造装置の全体構成を示す模式図である。It is a schematic diagram which shows the whole structure of the inner fin tube manufacturing apparatus which manufactures an inner fin tube. 第１実施形態のかしめ工程を示す断面図である。It is sectional drawing which shows the crimping process of 1st Embodiment. 第２実施形態のかしめ工程を示す断面図である。It is sectional drawing which shows the crimping process of 2nd Embodiment. 第２実施形態のかしめ工程を示す断面図である。It is sectional drawing which shows the crimping process of 2nd Embodiment.

符号の説明Explanation of symbols

１０ インナーフィンチューブ
１１ チューブ
１１ａ 屈曲部
１１ｂ 平板部
１１ｃ１ 第１端部
１１ｃ２ 第２端部
１２ インナーフィン
１２ｃ 平板部（一方の端部）
１２ｃ１ 曲げ部 DESCRIPTION OF SYMBOLS 10 Inner fin tube 11 Tube 11a Bending part 11b Flat plate part 11c1 1st end part 11c2 2nd end part 12 Inner fin 12c Flat plate part (one edge part)
12c1 bent part

Claims (9)

互いに対向する２つの板部（１１ｂ）の２つの端部のうち、第１端部（１１ｃ１）が第２端部（１１ｃ２）で包まれるように巻きかしめされたチューブ（１１）と、
前記チューブ（１１）内に配置され、一方の端部（１２ｃ）が前記第１端部（１１ｃ１）および前記第２端部（１１ｃ２）の間に挟みこまれて固定されたフィン（１２）とを備える熱交換器用チューブにおいて、
前記一方の端部（１２ｃ）には、Ｌ字状に折り曲げられて、前記第１端部（１１ｃ１）に位置決めされる曲げ部（１２ｃ１）が形成されたことを特徴とする熱交換器用チューブ。 Of the two ends of the two plate portions (11b) facing each other, a tube (11) that is wound so that the first end (11c1) is wrapped by the second end (11c2);
A fin (12) disposed in the tube (11) and having one end (12c) sandwiched and fixed between the first end (11c1) and the second end (11c2); In a heat exchanger tube comprising:
A tube for a heat exchanger, wherein the one end portion (12c) is formed with a bent portion (12c1) which is bent into an L shape and positioned at the first end portion (11c1). 前記板部（１１ｂ）の他端側が屈曲部（１１ａ）により接続されていることを特徴とする請求項１に記載の熱交換器用チューブ。   The tube for a heat exchanger according to claim 1, wherein the other end side of the plate portion (11b) is connected by a bent portion (11a). 前記曲げ部（１２ｃ１）の長さは、前記第１端部（１１ｃ１）の厚さと同等またはそれ以下であることを特徴とする請求項１または請求項２に記載の熱交換器用チューブ。   The tube for a heat exchanger according to claim 1 or 2, wherein a length of the bent portion (12c1) is equal to or less than a thickness of the first end portion (11c1). 請求項１〜請求項３のいずれか１つに記載の熱交換器用チューブ（１０）を備えることを特徴とする熱交換器。   A heat exchanger comprising the heat exchanger tube (10) according to any one of claims 1 to 3. ２つの板部（１１ｂ）を対向させて配置するチューブ外皮成形工程と、
板材製のフィン（１２）を前記２つの板部（１１ｂ）の間に挿入配置する挿入工程と、
前記挿入工程の終了後に、ひとつの前記板部（１１ｂ）の端部である第１端部（１１ｃ１）と、他の前記板部（１１ｂ）の端部である第２端部（１１ｃ２）との間に前記フィン（１２）の端部（１２ｃ）を位置させ、前記フィン（１２）の端部（１２ｃ）の先端に設けられた曲げ部（１２ｃ１）を前記第１端部（１１ｃ１）に係止させながら、前記第２端部（１１ｃ２）を前記第１端部（１１ｃ１）に巻きかしめするかしめ工程とを有することを特徴とする熱交換器用チューブの製造方法。 A tube skin forming step in which two plate portions (11b) are arranged to face each other;
An insertion step of inserting and arranging a fin (12) made of a plate material between the two plate portions (11b);
After the insertion step, a first end (11c1) that is an end of one plate (11b) and a second end (11c2) that is an end of another plate (11b) The end part (12c) of the fin (12) is positioned between the bent part (12c1) provided at the tip of the end part (12c) of the fin (12) to the first end part (11c1). A method for producing a heat exchanger tube, comprising: a step of caulking the second end portion (11c2) around the first end portion (11c1) while being locked. 前記挿入工程の前に、前記フィン（１２）の端部（１２ｃ）の先端に前記曲げ部（１２ｃ１）を形成する工程を、さらに有することを特徴とする請求項５に記載の熱交換器用チューブの製造方法。   6. The heat exchanger tube according to claim 5, further comprising a step of forming the bent portion (12c1) at the tip of the end portion (12c) of the fin (12) before the inserting step. Manufacturing method. 前記かしめ工程において、前記第２端部（１１ｃ２）を巻きかしめしながら、前記端部（１２ｃ）の先端に前記曲げ部（１２ｃ１）を形成することを特徴とする請求項５に記載の熱交換器用チューブの製造方法。   The heat exchange according to claim 5, wherein, in the caulking step, the bent portion (12c1) is formed at a tip of the end portion (12c) while the second end portion (11c2) is wound and caulked. A method for producing dexterous tubes. 前記かしめ工程の終了後に、前記チューブ（１１）の長手方向寸法を所定寸法に切断する切断工程をさらに備えることを特徴とする請求項５〜請求項７のいずれか１つに記載の熱交換器用チューブの製造方法。   The heat exchanger according to any one of claims 5 to 7, further comprising a cutting step of cutting a longitudinal dimension of the tube (11) into a predetermined size after the caulking step. Tube manufacturing method. 前記チューブ外皮成形工程は、板材を折り曲げて屈曲部（１１ａ）および２つの前記板部（１１ｂ）を形成することを特徴とする請求項５〜請求項８のいずれか１つに記載の熱交換器用チューブの製造方法。   The heat exchange according to any one of claims 5 to 8, wherein the tube skin forming step forms a bent portion (11a) and two plate portions (11b) by bending a plate material. A method for producing dexterous tubes.
JP2005315213A 2005-10-28 2005-10-28 Tube for heat exchanger and its manufacturing method Withdrawn JP2007120888A (en)

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US11/586,116 US20070095514A1 (en) 2005-10-28 2006-10-25 Tube for heat exchanger and method of manufacturing the same
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