JP3756641B2 - Tube for heat exchanger and manufacturing method thereof - Google Patents

Tube for heat exchanger and manufacturing method thereof Download PDF

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Publication number
JP3756641B2
JP3756641B2 JP26938697A JP26938697A JP3756641B2 JP 3756641 B2 JP3756641 B2 JP 3756641B2 JP 26938697 A JP26938697 A JP 26938697A JP 26938697 A JP26938697 A JP 26938697A JP 3756641 B2 JP3756641 B2 JP 3756641B2
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flat plate
tube
heat exchanger
inner fin
manufacturing
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JPH1183365A (en
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貴夫 木下
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Sanden Holdings Corp
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Sanden Corp
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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
    • 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
    • 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

Description

【０００１】
【発明の属する技術分野】
本発明は、熱交換器用チューブおよびその製造方法に関し、とくに、車両用熱交換器に好適な熱交換器用チューブおよびその製造方法、さらにはその熱交換器用チューブを備えた熱交換器に関する。
【０００２】
【従来の技術】
従来から、熱交換器用チューブとしては、図８、図９に示すようなものが知られている。図８、図９に示す熱交換器用チューブ５１は、たとえば押し出し成形によりチューブ５１を成形した後、チューブ５１の平板状部５５により形成される熱交換媒体用流路５２内に波形形状のインナーフィン５３を挿入し、インナーフィン５３の頂部５４と平板状部５５とを接合（たとえば、ろう付け）して製造されている。
【０００３】
このため、インナーフィン５３の波形の頂部５４の高さｈ1 は、チューブ５１内への挿入容易性および両平板状部５５とのろう付け性を考慮し、熱交換媒体用流路５２の高さＨと略同等かあるいは僅かに低く設定している。
【０００４】
一方、図１０、図１１に示す熱交換器用チューブ５６では、両平板状部５７、５８は互いに別体の２枚の平板から形成されており、両平板状部５７、５８の端部同士を接合して内部に熱交換媒体用流路５９が形成されている。また、一方の平板状部５７には、平板状部５７自身を他方の平板状部５８に向けて凸状に屈曲加工した隔壁６０が設けられており、隔壁６０の頂部６１を他方の平板状部５８にろう付けすることにより熱交換媒体用流路５９が２つに区画されている。このようなチューブにおいても、隔壁６０の頂部６１と平板状部５８との良好なろう付けを実現するために、隔壁６０の高さｈ2 は、熱交換媒体用流路５９の高さＨと略同等かあるいは僅かに低く設定している。
【０００５】
【発明が解決しようとする課題】
しかしながら、インナーフィン５３の高さｈ1 、あるいは隔壁６０の高さｈ2 を上記のような極めて狭い寸法公差の範囲に納めつつ、インナーフィン５３、隔壁６０を形成するのは困難であり、高さｈ1 、ｈ2 が流路５２、５９の高さよりも低くなり過ぎた場合には、上記ろう付け強度が不十分となり、熱交換器用チューブの耐圧性能低下を招くおそれがある。また、図８、図９に示したチューブ５１において、インナーフィン５３の高さｈ1 が流路５２の高さＨよりも高くなり過ぎた場合には、チューブ５１内へのインナーフィン５３の挿入が困難になり組付け作業性の低下を招くおそれもある。
【０００６】
本発明の課題は、インナーフィンあるいは隔壁の加工精度を緩和しつつ、インナーフィンあるいは隔壁とチューブの平板状部との良好な接合性を確保するとともに、チューブの製造作業性を向上することのできる熱交換器用チューブの製造方法を提供するとともに、該製造方法により製造され耐圧性能に優れた熱交換器用チューブ、該熱交換器用チューブを有する高性能な熱交換器を提供することにある。
【０００７】
【課題を解決するための手段】
上記課題を解決するために、本発明の熱交換器用チューブの製造方法は、対向する２つの平板状部間に熱交換媒体用流路を形成し、該流路内に、波形形状のインナーフィンを配置しその波形頂部を前記両平板状部に接合した熱交換器用チューブの製造方法において、前記両平板状部間に、チューブ完成後における前記熱交換媒体用流路の高さよりも波形の高さが高いインナーフィンを配置した後、両平板状部間でインナーフィンを挾圧し、該インナーフィンの前記波形頂部を押圧して変形させることを特徴とする方法からなる。
【０００８】
上記一方の平板状部のチューブ幅方向中央部には、該一方の平板状部自身を他方の平板状部に向けて凸状に屈曲加工することにより、前記熱交換媒体用流路内を区画する隔壁を形成することもできる。
【０００９】
上記隔壁は、チューブ完成後における熱交換媒体用流路の高さよりも高く形成しておき、該隔壁の頂部を他方の平板状部で押圧して変形させることも可能である。
【００１１】
上記両平板状部間には、インナーフィンを配置することができる。該インナーフィンは波形形状に形成することもできる。そして、その波形の高さをチューブ完成後における熱交換媒体用流路の高さよりも高く形成し、両平板状部間でインナーフィンを挾圧し該インナーフィン頂部を押圧して変形させることも可能である。
【００１２】
本発明における両平板状部は、１枚の平板を２つ折りにすることにより形成することができる。また、両平板状部は、互いに別体の２枚の平板から形成することもできる。
【００１３】
本発明に係る熱交換器用チューブの製造方法により製造される熱交換器用チューブは、たとえばチューブとフィンとを交互に配置したタイプの熱交換器に適用することができる。ただし、これに限定されるものではなく、他のタイプの熱交換器に適用することもできる。
【００１４】
上記のような熱交換器用チューブの製造方法においては、両平板状部間で波形のインナーフィンを挾圧した状態で、該インナーフィンの波形頂部が押圧されて変形される。したがって、インナーフィンの波形の高さは、最終的には熱交換媒体用流路の高さと同じ高さまで低減されるので、インナーフィンの加工精度の緩和を達成でき、そのため、インナーフィンと両平板状部との組付性を容易にできる。また、インナーフィンの波形頂部は、上記挾圧によってチューブ幅方向に若干押し拡げられることになるので、従来に比べてインナーフィンの波形頂部と両平板状部との接合面積を大きくすることができ、両者の一層良好な接合状態を実現することができる。そのため、耐圧強度に優れた熱交換器用チューブを提供することができる。
【００１６】
【発明の実施の形態】
以下に、本発明の望ましい実施の形態を図面を参照して説明する。
図１は、本発明の熱交換器用チューブの製造方法により製造された熱交換器用チューブを有する熱交換器を示している。熱交換器１は、一対のヘッダパイプ２、３と、該パイプ２、３間にわたって延び両パイプ２、３を互いに連通する熱交換器用チューブ４と、該チューブ４間に配設されたアウターフィン５とを有している。ヘッダパイプ３には、入口パイプ６、出口パイプ７が接続されており、熱交換媒体（たとえば冷媒）は、入口パイプ６から流入され、熱交換器１内を循環された後、出口パイプ７から流出されるようになっている。
【００１７】
上記熱交換器１の熱交換器用チューブ４は、本発明に係る熱交換器用チューブの製造方法により製造されている。図２（ｂ）、図３は、本発明の第１実施態様に係る熱交換器用チューブの製造方法により製造される熱交換器用チューブ８を示しており、チューブ８内には波形形状のインナーフィン９が設けられている。チューブ８は、間隔をもって互いに対向し、間に熱交換媒体用流路１０を形成する２つの平板状部１１、１２と、両平板状部１１、１２の一方の幅方向端部において両平板状部１１、１２を一体的に接続する曲げ加工部１３と、両平板状部１１、１２の他方の幅方向端部に形成された折り返し部１４、１５とを有している。折り返し部１４、１５は、両平板状部１１、１２の各端部をそれぞれ折り返すように曲げ加工することによって形成されている。インナーフィン９の頂部１６は、平板状部１１、１２の内面側にろう付けされている。
【００１８】
チューブ８は、以下のようにして製造されている。まずはじめに一枚の平板にプレス加工を施し、平板状部１１、１２、曲げ加工部１３、折り返し部１４を形成する。次に、波形形状のインナーフィン９を平板状部１１、１２間に挿入する（図２（ａ））。挿入されるインナーフィン９の高さｈ1 は、チューブ８完成後における熱交換媒体用流路１０の高さＨよりも高くなっている（図３（ａ））。
【００１９】
そして、両平板状部１１、１２間でインナーフィン９を挾圧し、折り返し部１４、１５を仮接合する（図２（ｂ））。上記挾圧によりインナーフィン９の頂部が押圧され変形する（図３（ｂ））。この状態で炉中においてろう付けし、インナーフィン９の頂部１６と両平板状部１１、１２、折り返し部１４と折り返し部１５とを接合する。
【００２０】
平板状部１１、１２間で挾圧され、頂部１６が押圧されて変形する結果、インナーフィン９の高さｈ1 は最終的には熱交換媒体用流路の高さＨと同じ高さまで低減される。したがって、インナーフィン９の加工精度を緩和でき、そのため、インナーフィン９と両平板状部１１、１２との組付性を容易にできる。
【００２１】
また、インナーフィン９の頂部１６は、チューブ８の幅方向に押し拡げられる（図３においては、略平坦に）ので、インナーフィン９と両平板状部１１、１２との接合面積が拡大され、両者の一層良好なろう付けを実現することができる。そのため、耐圧強度に優れた熱交換器用チューブを得ることができる。
【００２２】
図４（ｂ）は、本発明の第２実施態様に係る熱交換器用チューブの製造方法により製造される熱交換器用チューブ１７を示している。熱交換器用チューブ１７は、互いに２枚に別体の平板からなる平板状部１８、１９から形成されている。平板状部１８、１９の両端部には折り返し部２０、２１が設けられており、折り返し部２０、２１を接合することにより、平板状部１８、１９間に熱交換媒体用流路１０が形成されている。熱交換媒体用流路１０内には、図３に示した波形形状のインナーフィン９が設けられており、インナーフィン９の頂部１６は平板状部１８、１９の内面側にろう付けされている。
【００２３】
熱交換器用チューブ１７は、以下のようにして製造される。まず、はじめに、互いに別体の２枚の平板にプレス加工を施し、両端に折り返し部２０、２１を有する平板状部１８、１９を製造する。次に、一方の平板状部１９の両折り返し部２１間に図３に示した波形形状のインナーフィン９を載置する（図４（ａ））。インナーフィン９の高さｈ1 は、チューブ８完成後における熱交換媒体用流路１０の高さＨよりも高くなっている（図３（ａ））。
【００２４】
そして、両平板状部１８、１９間でインナーフィン９を挾圧し、折り返し部２０、２１を仮接合する（図４（ｂ））。上記挾圧によりインナーフィン９の頂部１６が押圧され変形する（図３（ｂ））。この状態で炉中においてろう付けし、インナーフィン９の頂部１６と両平板状部１８、１９、折り返し部２０、２１を接合する。
【００２５】
平板状部１８、１９間で挾圧され、頂部１６が変形される結果、インナーフィン９の高さｈ1 は、最終的には熱交換媒体用流路１０の高さＨと同じ高さまで低減される。したがって、インナーフィン９の加工精度を緩和でき、そのため、インナーフィン９と両平板状部１８、１９との組付性を容易にできる。また、従来に比べ両者間の接合面積が拡大されることになるので、一層良好なろう付けを実現することができる。そのため、耐圧強度の優れた熱交換器チューブを得ることができる。
【００２６】
図５（ｂ）は、本発明の第３実施態様に係る熱交換器用チューブの製造方法により製造される熱交換器用チューブ２２を示している。熱交換器用チューブ２２の平板状部２３、２４は、１枚の平板を２つ折りにすることにより形成されている。平板状部２３、２４の端部には折り返し部２５、２６が設けられている。また、一方の平板状部２３には、該平板状部２３自身を他方の平板状部２４に向けて凸状に屈曲加工して形成された隔壁２７が設けられている。隔壁２７はチューブ２２の幅方向中央部に設けられており、該隔壁２７により両平板状部２３、２４間に形成される熱交換媒体用流路１０は２つに区画されている。
【００２７】
熱交換器用チューブ２２は、以下のようにして製造されている。まずはじめに、１枚の平板にプレス加工を施し、両端に折り返し部２５、２６を有する平板状部２３、２４を形成する。また、このプレス加工と同時に隔壁２７を形成する。この際の隔壁２７の高さｈ2 は、チューブ２２完成後の熱交換媒体用流路１０の高さＨよりも高く形成されるようになっている（図５（ａ））。次に、曲げ加工部２８をさらに折り曲げると、隔壁２７の頂部２９が平板状部２４に押圧され変形する。そして、この状態で炉中においてろう付けし、隔壁２７の頂部２９と平板状部２４、折り返し部２５、２６が接合される。
【００２８】
上記他方の平板状部２４の押圧により、隔壁２７の頂部２９が変形される結果、該隔壁２７の高さｈ2 は、熱交換媒体用流路１０の高さＨと同じ高さまで低減される。したがって、隔壁２７の加工精度を緩和でき、そのため、隔壁２７と平板状部２４との接合を容易に行うことができる。また、頂部２９が変形される結果、接合面積も拡大されることになるので、一層強固なろう付けが可能となる。そのため、耐圧強度の優れた熱交換器チューブを得ることができる。
【００２９】
なお、本実施態様においては、平板状部２３、２４は１枚の平板から構成されているが、互いに別体の２枚の平板から構成してもよい。
【００３０】
図７（ｂ）は、本発明の第４実施態様に係る熱交換器用チューブの製造方法により製造される熱交換器用チューブ３３を示している。熱交換器用チューブ３３の平板状部２３、２４は、１枚の平板を２つ折りにすることにより形成されている。平板状部２３、２４の端部には折り返し部２５、２６が設けられている。また、一方の平板状部２３には、該平板状部２３自身を他方の平板状部２４に向けて凸状に屈曲加工して形成された隔壁２７が設けられている。隔壁２７はチューブ３３の幅方向中央部に設けられており、該隔壁２７の頂部２９を平板状部２４に接合することにより両平板状部２３、２４間に形成させる熱交換媒体用流路が２つに区画されている。
【００３１】
熱交換媒体用流路３０、３１内には、波形形状のインナーフィン３２が設けられている。インナーフィン３２の頂部３４は、両平板状部２３、２４の内面側にろう付けされている。
【００３２】
熱交換器用チューブ３３は、以下のように製造されている。まずはじめに、上記第３実施態様と同様に両平板状部２３、２４を形成する。次に、両平板状部２３、２４間にインナーフィン３２を載置して（図７（ａ））、さらに曲げ加工部２８を折り曲げて、両折り返し部２５、２６を仮接合し、この状態で炉中においてろう付けする。
【００３３】
本実施態様のような熱交換器用チューブの製造方法においては、インナーフィン３２の高さｈ1 および隔壁２７の高さｈ2 は共にチューブ３３の完成後の熱交換媒体用流路３０、３１の高さＨよりも高く形成されているので、上記第１〜第３実施態様の作用に準じて、インナーフィン３２および隔壁２７の加工精度を緩和でき、そのため、インナーフィン３２と両平板状部２３、２４との組付及び、隔壁２７と平板状部２４との接合を容易に実現することができる。また、インナーフィン３２の頂部３４および隔壁２７の頂部２９が変形される結果、接合面積も拡大されることになるので、一層強固なろう付けが可能となる。そのため、耐圧強度に優れた熱交換器用チューブを得ることができる。
【００３４】
なお、本実施態様においては、平板状部２３、２４は１枚の平板から構成されているが、互いに別体の２枚の平板から構成してもよい。
【００３５】
【発明の効果】
以上説明したように、本発明の熱交換器用チューブの製造方法によるときは、インナーフィン、隔壁の加工精度を緩和でき、そのため、インナーフィンおよび／または隔壁と平板状部との組付及び接合を容易に実現できる。また、インナーフィンおよび／または隔壁と平板状部との接合面積を拡大することができるので、一層強固な接合が可能になる。したがって、耐圧性に優れた熱交換器用チューブを得ることができ、該熱交換器用チューブを用いれば高性能な熱交換器を得ることができる。
【図面の簡単な説明】
【図１】本発明の熱交換器用チューブの製造方法により製造された熱交換器用チューブを有する熱交換器の正面図である。
【図２】本発明の第１実施態様に係る熱交換器用チューブの製造方法の各工程を示すチューブ端面図である。
【図３】図２の熱交換器用チューブ内に設けられるインナーフィンの高さの変化状態を示す、インナーフィンの概略部分端面図である。
【図４】本発明の第２実施態様に係る熱交換器用チューブの製造方法の各工程を示すチューブ端面図である。
【図５】本発明の第３実施態様に係る熱交換器用チューブの製造方法の各工程を示すチューブ端面図である。
【図６】図５の熱交換器用チューブの隔壁の高さの変化状態を示す拡大部分端面図である。
【図７】本発明の第４実施態様に係る熱交換器用チューブの製造方法の各工程を示すチューブ端面図である。
【図８】従来の熱交換器用チューブの端面図である。
【図９】図８の熱交換器用チューブ内のインナーフィンの拡大部分端面図である。
【図１０】従来の別の熱交換器用チューブの端面図である。
【図１１】図１０の熱交換器用チューブの隔壁の拡大端面図である。
【符号の説明】
１ 熱交換器
２、３ ヘッダパイプ
４、８、１７、２２、３３ 熱交換器用チューブ
５ アウターフィン
６ 入口パイプ
７ 出口パイプ
９、３２ インナーフィン
１０、３０、３１ 熱交換媒体用流路
１１、１２、１８、１９、２３、２４ 平板状部
１３、２８ 曲げ加工部
１４、１５、２０、２１、２５、２６ 折り返し部
１６、２９ 頂部
２７ 隔壁[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a heat exchanger tube and a manufacturing method thereof, and more particularly to a heat exchanger tube suitable for a vehicle heat exchanger, a manufacturing method thereof, and a heat exchanger provided with the heat exchanger tube.
[0002]
[Prior art]
Conventionally, as a tube for a heat exchanger, those shown in FIGS. 8 and 9 are known. The heat exchanger tube 51 shown in FIGS. 8 and 9 is formed by corrugated inner fins in the heat exchange medium flow path 52 formed by the flat plate portion 55 of the tube 51 after the tube 51 is formed by, for example, extrusion molding. 53 is inserted, and the top 54 of the inner fin 53 and the flat plate portion 55 are joined (for example, brazed).
[0003]
For this reason, the height h 1 of the corrugated top 54 of the inner fin 53 is set so as to increase the height of the heat exchange medium flow path 52 in consideration of ease of insertion into the tube 51 and brazing with both flat plate portions 55. It is set to be approximately equal to or slightly lower than the height H.
[0004]
On the other hand, in the heat exchanger tube 56 shown in FIGS. 10 and 11, both flat plate portions 57 and 58 are formed of two separate flat plates, and the ends of both flat plate portions 57 and 58 are connected to each other. A heat exchange medium flow path 59 is formed inside by joining. Further, one flat plate portion 57 is provided with a partition wall 60 in which the flat plate portion 57 itself is bent convexly toward the other flat plate portion 58, and the top portion 61 of the partition wall 60 is formed in the other flat plate shape. The heat exchange medium flow path 59 is divided into two parts by brazing the part 58. Even in such a tube, in order to achieve good brazing between the top portion 61 of the partition wall 60 and the flat plate portion 58, the height h 2 of the partition wall 60 is equal to the height H of the heat exchange medium channel 59. It is set to be approximately the same or slightly lower.
[0005]
[Problems to be solved by the invention]
However, it is difficult to form the inner fin 53 and the partition wall 60 while keeping the height h 1 of the inner fin 53 or the height h 2 of the partition wall 60 within the extremely narrow dimensional tolerance range as described above. If the heights h 1 and h 2 are too lower than the heights of the flow paths 52 and 59, the brazing strength is insufficient and there is a possibility that the pressure resistance performance of the heat exchanger tube will be lowered. Also, in the tube 51 shown in FIGS. 8 and 9, when the height h 1 of the inner fin 53 is too higher than the height H of the flow path 52, the inner fin 53 is inserted into the tube 51. May become difficult, and the assembly workability may be reduced.
[0006]
An object of the present invention is to secure good bonding properties between the inner fin or the partition wall and the flat portion of the tube while improving the processing accuracy of the inner fin or the partition wall, and improve the manufacturing workability of the tube. In addition to providing a method for manufacturing a heat exchanger tube, an object is to provide a heat exchanger tube manufactured by the manufacturing method and having excellent pressure resistance, and a high-performance heat exchanger having the heat exchanger tube.
[0007]
[Means for Solving the Problems]
In order to solve the above-described problems, a method for manufacturing a heat exchanger tube according to the present invention includes forming a heat exchange medium flow path between two opposing flat plate-like portions, and forming a corrugated inner fin in the flow path. In the method of manufacturing a heat exchanger tube in which the corrugated tops are joined to the two flat plate portions, the corrugated height is higher between the flat plate portions than the height of the flow path for the heat exchange medium after the tube is completed. After the inner fin is disposed, the inner fin is pressed between the two plate-like portions, and the corrugated top portion of the inner fin is pressed and deformed.
[0008]
In the central portion of the one flat plate portion in the tube width direction, the one flat plate portion itself is bent into a convex shape toward the other flat plate portion, thereby dividing the inside of the heat exchange medium flow path. A partition wall can also be formed.
[0009]
The partition wall may be formed higher than the height of the heat exchange medium flow path after the tube is completed, and the top of the partition wall may be pressed and deformed by the other flat plate portion.
[0011]
Inner fins can be disposed between the two plate-like portions. The inner fin can also be formed in a corrugated shape. And the height of the corrugation can be formed higher than the height of the heat exchange medium flow path after the tube is completed, and the inner fin can be pressed between the two plate-like parts and the top of the inner fin can be pressed to be deformed. It is.
[0012]
Both flat plate portions in the present invention can be formed by folding one flat plate in half. Moreover, both flat plate-like parts can also be formed from two separate flat plates.
[0013]
The heat exchanger tube manufactured by the method for manufacturing a heat exchanger tube according to the present invention can be applied to, for example, a type of heat exchanger in which tubes and fins are alternately arranged. However, the present invention is not limited to this, and can be applied to other types of heat exchangers.
[0014]
In the method for manufacturing a heat exchanger tube as described above, the corrugated top portion of the inner fin is pressed and deformed in a state where the corrugated inner fin is pressed between both flat plate-like portions. Accordingly, the corrugated height of the inner fin is finally reduced to the same height as the heat exchange medium flow path, so that the processing accuracy of the inner fin can be relaxed. Assembling with the shaped part can be facilitated. In addition, the corrugated top of the inner fin is slightly expanded in the tube width direction due to the above-described pressure, so that the joining area between the corrugated top of the inner fin and both flat plate portions can be increased compared to the conventional case. Further, it is possible to realize a better bonding state between the two. Therefore, it is possible to provide a heat exchanger tube having excellent pressure strength.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a heat exchanger having a heat exchanger tube manufactured by the method for manufacturing a heat exchanger tube of the present invention. The heat exchanger 1 includes a pair of header pipes 2 and 3, a heat exchanger tube 4 extending between the pipes 2 and 3 and communicating with the pipes 2 and 3, and an outer fin disposed between the tubes 4. 5. An inlet pipe 6 and an outlet pipe 7 are connected to the header pipe 3, and a heat exchange medium (for example, a refrigerant) is introduced from the inlet pipe 6 and circulated in the heat exchanger 1, and then from the outlet pipe 7. It comes to be leaked.
[0017]
The heat exchanger tube 4 of the heat exchanger 1 is manufactured by the heat exchanger tube manufacturing method according to the present invention. FIGS. 2B and 3 show a heat exchanger tube 8 manufactured by the method for manufacturing a heat exchanger tube according to the first embodiment of the present invention. The tube 8 has a corrugated inner fin. 9 is provided. The tube 8 has two flat plate portions 11 and 12 that face each other at an interval and form a heat exchange medium flow path 10 therebetween, and both flat plate portions at one end in the width direction of both flat plate portions 11 and 12. It has the bending process part 13 which connects the parts 11 and 12 integrally, and the folding | returning parts 14 and 15 formed in the other width direction edge part of both the plate-shaped parts 11 and 12. FIG. The folded portions 14 and 15 are formed by bending each end portion of the flat plate portions 11 and 12 so as to be folded. The top portion 16 of the inner fin 9 is brazed to the inner surface side of the flat plate portions 11 and 12.
[0018]
The tube 8 is manufactured as follows. First, a flat plate is pressed to form flat plate portions 11 and 12, a bent portion 13, and a folded portion 14. Next, the corrugated inner fin 9 is inserted between the flat portions 11 and 12 (FIG. 2A). The height h 1 of the inserted inner fin 9 is higher than the height H of the heat exchange medium flow path 10 after the tube 8 is completed (FIG. 3A).
[0019]
Then, the inner fin 9 is pressed between the flat plate portions 11 and 12, and the folded portions 14 and 15 are temporarily joined (FIG. 2B). The top part of the inner fin 9 is pressed and deformed by the above-described repulsive pressure (FIG. 3B). In this state, brazing is performed in the furnace, and the top portion 16 of the inner fin 9 and the two flat plate-like portions 11 and 12, and the folded portion 14 and the folded portion 15 are joined.
[0020]
As a result of the pressure between the flat plate portions 11 and 12 and the deformation of the top portion 16 by being pressed, the height h 1 of the inner fin 9 is finally reduced to the same height as the height H of the heat exchange medium flow path. Is done. Therefore, the processing accuracy of the inner fin 9 can be relaxed, and therefore, the assembling property between the inner fin 9 and the flat plate portions 11 and 12 can be facilitated.
[0021]
Further, since the top portion 16 of the inner fin 9 is expanded in the width direction of the tube 8 (substantially flat in FIG. 3), the joint area between the inner fin 9 and both flat plate portions 11 and 12 is expanded, Better brazing of both can be achieved. Therefore, a heat exchanger tube having excellent pressure strength can be obtained.
[0022]
FIG.4 (b) has shown the tube 17 for heat exchangers manufactured with the manufacturing method of the tube for heat exchangers concerning the 2nd embodiment of this invention. The heat exchanger tube 17 is formed of flat plate-like portions 18 and 19 which are two flat plates. Folded portions 20 and 21 are provided at both ends of the flat plate portions 18 and 19, and the heat exchange medium flow path 10 is formed between the flat plate portions 18 and 19 by joining the folded portions 20 and 21. Has been. The corrugated inner fin 9 shown in FIG. 3 is provided in the heat exchange medium flow path 10, and the top 16 of the inner fin 9 is brazed to the inner surfaces of the flat plate-like parts 18 and 19. .
[0023]
The heat exchanger tube 17 is manufactured as follows. First, two flat plates that are separate from each other are pressed to produce flat plate portions 18 and 19 having folded portions 20 and 21 at both ends. Next, the corrugated inner fin 9 shown in FIG. 3 is placed between the folded portions 21 of the one flat plate portion 19 (FIG. 4A). The height h 1 of the inner fin 9 is higher than the height H of the heat exchange medium flow path 10 after completion of the tube 8 (FIG. 3A).
[0024]
Then, the inner fin 9 is pressed between the flat plate portions 18 and 19, and the folded portions 20 and 21 are temporarily joined (FIG. 4B). The top portion 16 of the inner fin 9 is pressed and deformed by the above-described repulsive pressure (FIG. 3B). In this state, brazing is performed in the furnace, and the top portion 16 of the inner fin 9, the flat plate portions 18, 19 and the folded portions 20, 21 are joined.
[0025]
As a result of the pressure between the flat plate portions 18 and 19 and the top portion 16 being deformed, the height h 1 of the inner fin 9 is finally reduced to the same height as the height H of the heat exchange medium flow path 10. Is done. Therefore, the processing accuracy of the inner fin 9 can be relaxed, and therefore, the assembling property between the inner fin 9 and the flat plate portions 18 and 19 can be facilitated. Moreover, since the joint area between both is expanded compared with the past, more favorable brazing can be implement | achieved. Therefore, a heat exchanger tube having excellent pressure strength can be obtained.
[0026]
FIG.5 (b) has shown the tube 22 for heat exchangers manufactured with the manufacturing method of the tube for heat exchangers concerning the 3rd embodiment of this invention. The flat plate portions 23 and 24 of the heat exchanger tube 22 are formed by folding a single flat plate into two. Folded portions 25 and 26 are provided at the end portions of the flat plate-like portions 23 and 24. Further, one flat plate portion 23 is provided with a partition wall 27 formed by bending the flat plate portion 23 itself toward the other flat plate portion 24 in a convex shape. The partition wall 27 is provided in the center of the tube 22 in the width direction, and the partition wall 27 divides the heat exchange medium flow path 10 formed between the flat plate portions 23 and 24 into two.
[0027]
The heat exchanger tube 22 is manufactured as follows. First, a single flat plate is pressed to form flat plate portions 23 and 24 having folded portions 25 and 26 at both ends. In addition, the partition wall 27 is formed simultaneously with this pressing. The height h 2 of the partition wall 27 at this time is formed to be higher than the height H of the heat exchange medium flow channel 10 after the tube 22 is completed (FIG. 5A). Next, when the bent portion 28 is further bent, the top portion 29 of the partition wall 27 is pressed by the flat plate portion 24 and deformed. And in this state, it brazes in a furnace, and the top part 29 of the partition 27, the flat plate part 24, and the folding | returning parts 25 and 26 are joined.
[0028]
By pressing the other of the flat portions 24, results in which the top portion 29 of the partition wall 27 is deformed, the height h 2 of the partition walls 27 is reduced to the same height as the height H of the heat exchange medium passage 10 . Therefore, the processing accuracy of the partition wall 27 can be relaxed, and therefore the partition wall 27 and the flat plate portion 24 can be easily joined. Further, as a result of the deformation of the top portion 29, the bonding area is also enlarged, so that stronger brazing can be performed. Therefore, a heat exchanger tube having excellent pressure strength can be obtained.
[0029]
In the present embodiment, the flat plate-like portions 23 and 24 are composed of one flat plate, but may be composed of two separate flat plates.
[0030]
FIG.7 (b) has shown the tube 33 for heat exchangers manufactured with the manufacturing method of the tube for heat exchangers concerning the 4th embodiment of this invention. The flat plate portions 23 and 24 of the heat exchanger tube 33 are formed by folding a single flat plate into two. Folded portions 25 and 26 are provided at the end portions of the flat plate-like portions 23 and 24. Further, one flat plate portion 23 is provided with a partition wall 27 formed by bending the flat plate portion 23 itself toward the other flat plate portion 24 in a convex shape. The partition wall 27 is provided at the center in the width direction of the tube 33, and a heat exchange medium flow path formed between the flat plate portions 23 and 24 by joining the top portion 29 of the partition wall 27 to the flat plate portion 24. It is divided into two sections.
[0031]
In the heat exchange medium flow paths 30 and 31, corrugated inner fins 32 are provided. The top 34 of the inner fin 32 is brazed to the inner surfaces of both flat plate-like parts 23 and 24.
[0032]
The heat exchanger tube 33 is manufactured as follows. First, both flat plate portions 23 and 24 are formed in the same manner as in the third embodiment. Next, the inner fin 32 is placed between the flat plate portions 23 and 24 (FIG. 7A), the bent portion 28 is further bent, and the folded portions 25 and 26 are temporarily joined together. And braze in the furnace.
[0033]
In the method of manufacturing a heat exchanger tube as in this embodiment, the height h 1 of the inner fin 32 and the height h 2 of the partition wall 27 are both the heat exchange medium flow paths 30 and 31 after the tube 33 is completed. Since it is formed higher than the height H, the processing accuracy of the inner fin 32 and the partition wall 27 can be relaxed in accordance with the operation of the first to third embodiments. , 24 and the joining of the partition wall 27 and the flat plate portion 24 can be easily realized. Further, as a result of deformation of the top part 34 of the inner fin 32 and the top part 29 of the partition wall 27, the joining area is also enlarged, so that stronger brazing can be achieved. Therefore, a heat exchanger tube having excellent pressure strength can be obtained.
[0034]
In the present embodiment, the flat plate-like portions 23 and 24 are composed of one flat plate, but may be composed of two separate flat plates.
[0035]
【The invention's effect】
As described above, when the method for manufacturing a heat exchanger tube according to the present invention is used, the processing accuracy of the inner fin and the partition can be relaxed, and therefore, the assembly and joining of the inner fin and / or the partition and the flat plate portion can be performed. It can be easily realized. In addition, since the bonding area between the inner fin and / or the partition wall and the flat plate-like portion can be increased, stronger bonding can be achieved. Therefore, a heat exchanger tube having excellent pressure resistance can be obtained, and a high-performance heat exchanger can be obtained by using the heat exchanger tube.
[Brief description of the drawings]
FIG. 1 is a front view of a heat exchanger having a heat exchanger tube manufactured by the method for manufacturing a heat exchanger tube of the present invention.
FIG. 2 is a tube end view showing each step of the method for manufacturing a heat exchanger tube according to the first embodiment of the present invention.
FIG. 3 is a schematic partial end view of the inner fin, showing a change in the height of the inner fin provided in the heat exchanger tube of FIG. 2;
FIG. 4 is a tube end view showing each step of a method of manufacturing a heat exchanger tube according to a second embodiment of the present invention.
FIG. 5 is a tube end view showing each step of a method of manufacturing a heat exchanger tube according to a third embodiment of the present invention.
6 is an enlarged partial end view showing a change in the height of the partition wall of the heat exchanger tube of FIG. 5;
FIG. 7 is a tube end view showing each step of a method of manufacturing a heat exchanger tube according to a fourth embodiment of the present invention.
FIG. 8 is an end view of a conventional heat exchanger tube.
9 is an enlarged partial end view of an inner fin in the heat exchanger tube of FIG. 8. FIG.
FIG. 10 is an end view of another conventional heat exchanger tube.
11 is an enlarged end view of a partition wall of the heat exchanger tube of FIG. 10;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Heat exchanger 2, 3 Header pipe 4, 8, 17, 22, 33 Heat exchanger tube 5 Outer fin 6 Inlet pipe 7 Outlet pipe 9, 32 Inner fin 10, 30, 31 Heat exchange medium flow path 11, 12 , 18, 19, 23, 24 Flat part 13, 28 Bending part 14, 15, 20, 21, 25, 26 Folded part 16, 29 Top part 27 Partition

Claims (7)

対向する２つの平板状部間に熱交換媒体用流路を形成し、該流路内に、波形形状のインナーフィンを配置しその波形頂部を前記両平板状部に接合した熱交換器用チューブの製造方法において、前記両平板状部間に、チューブ完成後における前記熱交換媒体用流路の高さよりも波形の高さが高いインナーフィンを配置した後、両平板状部間でインナーフィンを挾圧し、該インナーフィンの前記波形頂部を押圧して変形させることを特徴とする、熱交換器用チューブの製造方法。A heat exchanger medium flow path is formed between two opposing flat plate portions, a corrugated inner fin is disposed in the flow channel, and a corrugated top portion is joined to the two flat plate portions. In the manufacturing method, an inner fin having a corrugated height higher than the height of the heat exchange medium channel after completion of the tube is disposed between the flat plate portions, and then the inner fin is interposed between the flat plate portions. A method for producing a tube for a heat exchanger, characterized by pressing and deforming the corrugated top of the inner fin. 一方の平板状部のチューブ幅方向中央部に、該一方の平板状部自身を他方の平板状部に向けて凸状に屈曲加工することにより、前記熱交換媒体用流路内を区画する隔壁を形成する、請求項１の熱交換器用チューブの製造方法。  A partition partitioning the inside of the heat exchange medium flow path by bending the one flat plate portion itself toward the other flat plate portion at the central portion in the tube width direction of one flat plate portion. The manufacturing method of the tube for heat exchangers of Claim 1 which forms. 前記隔壁を、チューブ完成後における前記熱交換媒体用流路の高さよりも高く形成しておき、該隔壁の頂部を他方の平板状部で押圧して変形させる、請求項２の熱交換器用チューブの製造方法。  The heat exchanger tube according to claim 2, wherein the partition wall is formed higher than a height of the heat exchange medium flow path after the tube is completed, and the top portion of the partition wall is pressed and deformed by the other flat plate portion. Manufacturing method. 前記両平板状部を、１枚の平板を２つ折りにすることにより形成する、請求項１ないし３のいずれかに記載の熱交換器用チューブの製造方法。The manufacturing method of the tube for heat exchangers in any one of Claim 1 thru | or 3 which forms the said both flat plate-like part by folding one flat plate into two. 前記両平板状部を、互いに別体の２枚の平板から形成する、請求項１ないし３のいずれかに記載の熱交換器用チューブの製造方法。The method for manufacturing a tube for a heat exchanger according to any one of claims 1 to 3, wherein the two plate-like portions are formed from two flat plates that are separate from each other. 前記請求項１ないし５のいずれかに記載の製造方法により製造された熱交換器用チューブ。A heat exchanger tube manufactured by the manufacturing method according to any one of claims 1 to 5. 請求項６の熱交換器用チューブを有する熱交換器。The heat exchanger which has the tube for heat exchangers of Claim 6.
JP26938697A 1997-09-16 1997-09-16 Tube for heat exchanger and manufacturing method thereof Expired - Fee Related JP3756641B2 (en)

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JP2008145024A (en) * 2006-12-07 2008-06-26 Usui Kokusai Sangyo Kaisha Ltd Manufacturing method of flat heat transfer tube, flat heat transfer tube obtained by method, and gas cooling device incorporating flat heat transfer tube
JP7410713B2 (en) * 2019-12-25 2024-01-10 株式会社レゾナック Heat exchanger

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