JP2006200862A - Flat tube for heat exchanger - Google Patents

Flat tube for heat exchanger Download PDF

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Publication number
JP2006200862A
JP2006200862A JP2005015164A JP2005015164A JP2006200862A JP 2006200862 A JP2006200862 A JP 2006200862A JP 2005015164 A JP2005015164 A JP 2005015164A JP 2005015164 A JP2005015164 A JP 2005015164A JP 2006200862 A JP2006200862 A JP 2006200862A
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Prior art keywords
flat tube
flat
heat exchanger
fin
partition portion
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JP2005015164A
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Japanese (ja)
Inventor
Yoichiro Yoshida
洋一郎 吉田
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T Rad Co Ltd
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T Rad Co Ltd
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Priority to JP2005015164A priority Critical patent/JP2006200862A/en
Publication of JP2006200862A publication Critical patent/JP2006200862A/en
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    • 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
    • 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
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F1/022—Tubular elements of cross-section which is non-circular with multiple channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • 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

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  • 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)

Abstract

<P>PROBLEM TO BE SOLVED: To improve a brazing property of an inner fin or an outer fin to a flat tube. <P>SOLUTION: This flat tube 11 for a heat exchanger having a flat cross sectional shape has: a pair of flat surface parts 12, 13 oppositely provided in parallel; and a partition part 16 provided over between the respective flat surface parts 12, 13. The partition part 16 is bent such that it is elastically deformable to outside pressure to the flat surface parts 12, 13, and the inner faces 22 of the flat surface parts 12, 13 are brazed with the inner fin 19. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、扁平な断面形状を有する熱交換器用扁平チューブに関し、特に、内部に仕切り部が形成された熱交換器用扁平チューブに関する。   The present invention relates to a flat tube for a heat exchanger having a flat cross-sectional shape, and particularly relates to a flat tube for a heat exchanger in which a partition portion is formed.

従来、自動車用オイルクーラ等の熱交換器においては、伝熱管として扁平チューブが使用されており、該扁平チューブ内を流通する流体とその外部を流通する流体との間で熱交換が行われるようになっている。   Conventionally, in a heat exchanger such as an oil cooler for automobiles, a flat tube is used as a heat transfer tube, and heat exchange is performed between a fluid flowing in the flat tube and a fluid flowing outside the flat tube. It has become.

図４に示すように、この種の従来の熱交換器用扁平チューブ１は、押出し成形により形成されるため、中央部に仕切り部２が設けられている。また、高い熱交換性能が要求される場合には、扁平チューブ１の内部にインナーフィン３が挿入されると共に、扁平チューブ１の外部にアウターフィン４が設けられ、このインナーフィン３及びアウターフィン４はそれぞれ扁平チューブ１の内外面にろう付けされるようになっている。（例えば、特許文献１参照）。
特開２０００−２３４８８８号公報 As shown in FIG. 4, since this kind of conventional flat tube 1 for heat exchangers is formed by extrusion molding, the partition part 2 is provided in the center part. When high heat exchange performance is required, the inner fin 3 is inserted into the flat tube 1 and the outer fin 4 is provided outside the flat tube 1. Are brazed to the inner and outer surfaces of the flat tube 1, respectively. (For example, refer to Patent Document 1).
JP 2000-234888 A

しかしながら、上記した従来の熱交換器用扁平チューブでは、扁平チューブ１とインナーフィン３及びアウターフィン４とのろう付け接合時に、仕切り部２が突っ張りとして作用し、図４に示すように、扁平チューブ１の中央部が膨らんだ状態になる。このため、扁平チューブ１の中央部では、インナーフィン３が扁平チューブ１の内面５と密着せず、また、扁平チューブ１の両側部では、アウターフィン４が扁平チューブ１の外面６と密着しないため、扁平チューブ１に対するインナーフィン３及びアウターフィン４のろう付け性が低下するといった問題があった。   However, in the above-described conventional flat tube for a heat exchanger, when the flat tube 1 and the inner fin 3 and the outer fin 4 are joined by brazing, the partition portion 2 acts as a tension, and as shown in FIG. The center of the swells. For this reason, the inner fin 3 does not adhere to the inner surface 5 of the flat tube 1 at the center of the flat tube 1, and the outer fin 4 does not adhere to the outer surface 6 of the flat tube 1 at both sides of the flat tube 1. There has been a problem that the brazing properties of the inner fin 3 and the outer fin 4 with respect to the flat tube 1 are lowered.

本発明は、上記した課題を解決すべくなされたものであり、扁平チューブに対するインナーフィン又はアウターフィンのろう付け性の向上を図ることができる熱交換器用扁平チューブを提供しようとするものである。   The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a flat tube for a heat exchanger that can improve the brazing performance of an inner fin or an outer fin with respect to the flat tube.

本発明は、扁平な断面形状を有する熱交換器用扁平チューブであって、対向して平行に設けられた一対の平面部と、該各平面部間に渡設された仕切り部とを備え、該仕切り部は前記平面部に対する外圧に対して弾性変形可能なように曲成されており、前記平面部の内面にはインナーフィンがろう付けされていることを特徴とする。   The present invention is a flat tube for a heat exchanger having a flat cross-sectional shape, and includes a pair of flat portions provided in parallel to face each other, and a partition portion provided between the flat portions, The partition portion is bent so as to be elastically deformable against an external pressure applied to the flat portion, and an inner fin is brazed to the inner surface of the flat portion.

また、本発明は、扁平な断面形状を有する熱交換器用扁平チューブであって、対向して平行に設けられた一対の平面部と、該各平面部間に渡設された仕切り部とを備え、該仕切り部は前記平面部に対する外圧に対して弾性変形可能なように曲成されており、前記平面部の外面にはアウターフィンがろう付けされていることを特徴とする。   Further, the present invention is a flat tube for a heat exchanger having a flat cross-sectional shape, and includes a pair of plane portions provided in parallel to face each other, and a partition portion provided between the plane portions. The partition part is bent so as to be elastically deformable against an external pressure applied to the flat part, and an outer fin is brazed to the outer surface of the flat part.

本発明に係る熱交換器用扁平チューブによれば、仕切り部は平面部に対する外圧に対して弾性変形可能なように曲成されているため、ろう付け接合時に、仕切り部が弾性変形し、平面部は平坦面を形成する。   According to the flat tube for a heat exchanger according to the present invention, since the partition portion is bent so as to be elastically deformable with respect to the external pressure with respect to the flat portion, the partition portion is elastically deformed during brazing and joining. Forms a flat surface.

したがって、扁平チューブの内面にインナーフィンが密着、或いは、扁平チューブの外面にアウターフィンが密着し、インナーフィン又はアウターフィンは扁平チューブ１１の内面又は外面に確実に固定され、そのろう付け性の向上を図ることができる等、種々の優れた効果を得ることができる。   Therefore, the inner fin is in close contact with the inner surface of the flat tube, or the outer fin is in close contact with the outer surface of the flat tube, and the inner fin or the outer fin is securely fixed to the inner surface or outer surface of the flat tube 11, and the brazing property is improved. Various excellent effects can be obtained.

以下、図面を参照しつつ、本発明の実施の形態について説明する。ここで、図１は本発明の実施の形態に係る熱交換器用扁平チューブを示す断面図、図２（ａ）は熱交換器の組立て時の状態を示す正面図、図２（ｂ）は熱交換器のろう付け時の状態を示す正面図である。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. Here, FIG. 1 is a sectional view showing a flat tube for a heat exchanger according to an embodiment of the present invention, FIG. 2 (a) is a front view showing a state when the heat exchanger is assembled, and FIG. It is a front view which shows the state at the time of brazing of an exchanger.

この熱交換器用扁平チューブ１１は、押出し成形により扁平な断面形状に形成されており、対向して平行に設けられた一対の平面部１２，１３と、その両側において外側に凹状に湾曲して形成された左右曲面部１４，１５と、扁平チューブ１１の中央部に沿って各平面部１２，１３間に渡設された仕切り部１６とを備え、この仕切り部１６により扁平チューブ１１の内部は２つの流路１７，１８に分割されている。そして、この仕切り部１６は、くの字状断面を成すよう曲成されており、平面部１２，１３に対する外圧に対して弾性変形可能となっている。   The flat tube 11 for heat exchanger is formed in a flat cross-sectional shape by extrusion molding, and is formed by a pair of flat portions 12 and 13 provided in parallel to face each other and curved outwardly concavely on both sides thereof. Left and right curved surface portions 14 and 15 and a partition portion 16 provided between the flat surface portions 12 and 13 along the central portion of the flat tube 11, and the inside of the flat tube 11 is 2 by this partition portion 16. It is divided into two flow paths 17 and 18. The partition portion 16 is bent so as to have a dogleg-shaped cross section, and is elastically deformable with respect to an external pressure applied to the plane portions 12 and 13.

また、扁平チューブ１１の各流路１７，１８には、インナーフィン１９が挿入されており、インナーフィン１９は、その頂部２０及び底部２１が扁平チューブ１１の内面２２にろう付け接合されるようになっている。さらに、扁平チューブ１１の各平面部１２，１３の外面２３，２４にはそれぞれ、アウターフィン２５がろう付け接合されるようになっている。   Further, an inner fin 19 is inserted into each flow path 17, 18 of the flat tube 11, and the inner fin 19 is brazed and joined to the inner surface 22 of the flat tube 11 at its top 20 and bottom 21. It has become. Further, outer fins 25 are brazed and joined to the outer surfaces 23 and 24 of the flat portions 12 and 13 of the flat tube 11, respectively.

次に、図１及び図２（ａ）及び（ｂ）を参照しつつ、本発明の実施の形態における熱交換器のろう付け作業の手順について説明する。   Next, the procedure of the brazing operation of the heat exchanger in the embodiment of the present invention will be described with reference to FIGS. 1 and 2 (a) and 2 (b).

先ず、扁平チューブ１１内の各流路１７，１８にそれぞれインナーフィン１９を挿入すると共に、その扁平チューブ１１を多数並設させ、各扁平チューブ１１の間にアウターフィン２５を介装させる。そして、図２（ａ）に示すように、各扁平チューブ１１の両端部をヘッダプレート２６，２７に貫設し、熱交換器を組み立てる。   First, the inner fins 19 are inserted into the flow paths 17 and 18 in the flat tube 11, and a large number of the flat tubes 11 are arranged side by side, and the outer fins 25 are interposed between the flat tubes 11. And as shown to Fig.2 (a), the both ends of each flat tube 11 are penetrated by the header plates 26 and 27, and a heat exchanger is assembled.

次いで、図２（ｂ）に示すように、並設された扁平チューブ１１の外周に治具２８を巻き付け、各扁平チューブ１１を所定圧力で締め付けた状態で、この熱交換器を炉内に挿入し、各接合部をろう付け固定する。   Next, as shown in FIG. 2 (b), a jig 28 is wound around the outer periphery of the flat tubes 11 arranged side by side, and the heat exchanger is inserted into the furnace in a state in which the flat tubes 11 are tightened at a predetermined pressure. Then, each joint is fixed by brazing.

上記したように扁平チューブ１１の仕切り部１６がくの字状に曲成されているため、熱交換器が治具２８により締め付けられた時、仕切り部１６は弾性変形し、各平面部１２，１３は平坦面を形成する。そのため、扁平チューブ１１の内面２２にインナーフィン１９の頂部２０及び底部２１が密着すると共に、扁平チューブ１１の外面２３にアウターフィン２５が密着し、インナーフィン１９及びアウターフィン２５は扁平チューブ１１の内面２２及び外面２３に確実に固定される。   As described above, since the partition portion 16 of the flat tube 11 is bent in a U-shape, when the heat exchanger is tightened by the jig 28, the partition portion 16 is elastically deformed, and each of the planar portions 12, 13 Forms a flat surface. Therefore, the top portion 20 and the bottom portion 21 of the inner fin 19 are in close contact with the inner surface 22 of the flat tube 11, the outer fin 25 is in close contact with the outer surface 23 of the flat tube 11, and the inner fin 19 and the outer fin 25 are in contact with the inner surface of the flat tube 11. 22 and the outer surface 23 are securely fixed.

なお、上記した実施の形態において、仕切り部１６は、くの字状断面を成しているが、図３に示すように、円弧状断面等、平面部１２，１３に対する外圧に対して弾性変形可能なように曲成されていれば、他の断面形状を成していてもよい。   In the above-described embodiment, the partition portion 16 has a dogleg-shaped cross section. However, as shown in FIG. 3, the partition portion 16 is elastically deformed with respect to the external pressure on the plane portions 12 and 13 such as an arc-shaped cross section. Other cross-sectional shapes may be used as long as they are bent as possible.

また、仕切り部１６の設置位置及び設置数は、上記した実施の形態の場合に限定されるものではなく、例えば、仕切り部を複数設けて、そのうちの一部を上記したように曲成させる等、各種変更が可能である。   Moreover, the installation position and the number of installation of the partition part 16 are not limited to the case of above-described embodiment, For example, a plurality of partition parts are provided, and a part of them is bent as described above. Various changes are possible.

さらに、扁平チューブ１１には、必ずしも、インナーフィン１９とアウターフィン２５の両方が設けられている必要はない。   Further, the flat tube 11 is not necessarily provided with both the inner fin 19 and the outer fin 25.

本発明の実施の形態に係る熱交換器用扁平チューブを示す断面図である。It is sectional drawing which shows the flat tube for heat exchangers which concerns on embodiment of this invention. （ａ）及び（ｂ）は本発明の実施の形態における熱交換器のろう付け作業の手順を示す正面図である。(A) And (b) is a front view which shows the procedure of the brazing operation | work of the heat exchanger in embodiment of this invention. 本発明の実施の形態に係る熱交換器用扁平チューブの別の例を示す断面図である。It is sectional drawing which shows another example of the flat tube for heat exchangers which concerns on embodiment of this invention. 従来例を示す断面図である。It is sectional drawing which shows a prior art example.

符号の説明Explanation of symbols

１１ 扁平チューブ
１２ 平面部
１３ 平面部
１６ 仕切り部
１９ インナーフィン
２２ 内面
２３ 外面
２４ 外面
２５ アウターフィン DESCRIPTION OF SYMBOLS 11 Flat tube 12 Plane part 13 Plane part 16 Partition part 19 Inner fin 22 Inner surface 23 Outer surface 24 Outer surface 25 Outer fin

Claims (2)

扁平な断面形状を有する熱交換器用扁平チューブであって、
対向して平行に設けられた一対の平面部と、該各平面部間に渡設された仕切り部とを備え、該仕切り部は前記平面部に対する外圧に対して弾性変形可能なように曲成されており、前記平面部の内面にはインナーフィンがろう付けされていることを特徴とする熱交換器用扁平チューブ。 A flat tube for a heat exchanger having a flat cross-sectional shape,
A pair of plane portions provided in parallel to face each other and a partition portion provided between the plane portions, and the partition portion is bent so as to be elastically deformable against an external pressure applied to the plane portion. A flat tube for a heat exchanger, wherein an inner fin is brazed to the inner surface of the flat portion. 扁平な断面形状を有する熱交換器用扁平チューブであって、
対向して平行に設けられた一対の平面部と、該各平面部間に渡設された仕切り部とを備え、該仕切り部は前記平面部に対する外圧に対して弾性変形可能なように曲成されており、前記平面部の外面にはアウターフィンがろう付けされていることを特徴とする熱交換器用扁平チューブ。
A flat tube for a heat exchanger having a flat cross-sectional shape,
A pair of plane portions provided in parallel to face each other and a partition portion provided between the plane portions, and the partition portion is bent so as to be elastically deformable against an external pressure applied to the plane portion. A flat tube for a heat exchanger, wherein an outer fin is brazed to the outer surface of the flat portion.
JP2005015164A 2005-01-24 2005-01-24 Flat tube for heat exchanger Pending JP2006200862A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008241095A (en) * 2007-03-27 2008-10-09 Tokyo Radiator Mfg Co Ltd Tube internal structure of oil cooler for construction machine
WO2009013179A3 (en) * 2007-07-23 2009-11-05 M.T.A. S.P.A. Heat exchanger with mini- and/or micro-channels and method for its construction
CN102192672A (en) * 2010-03-16 2011-09-21 乐金电子(天津)电器有限公司 Flat tube heat exchanger structure and assembling method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008241095A (en) * 2007-03-27 2008-10-09 Tokyo Radiator Mfg Co Ltd Tube internal structure of oil cooler for construction machine
WO2009013179A3 (en) * 2007-07-23 2009-11-05 M.T.A. S.P.A. Heat exchanger with mini- and/or micro-channels and method for its construction
CN102192672A (en) * 2010-03-16 2011-09-21 乐金电子(天津)电器有限公司 Flat tube heat exchanger structure and assembling method thereof

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