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JP2015055459A - Tank structure of header plate-less heat exchanger - Google Patents

Tank structure of header plate-less heat exchanger Download PDF

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JP2015055459A
JP2015055459A JP2013190837A JP2013190837A JP2015055459A JP 2015055459 A JP2015055459 A JP 2015055459A JP 2013190837 A JP2013190837 A JP 2013190837A JP 2013190837 A JP2013190837 A JP 2013190837A JP 2015055459 A JP2015055459 A JP 2015055459A
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tank
heat exchanger
flat tube
contact
tank structure
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中村　洋一
Yoichi Nakamura
洋一 中村
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T Rad Co Ltd
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T Rad Co Ltd
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Priority to JP2013190837A priority Critical patent/JP2015055459A/en
Priority to PCT/JP2014/074159 priority patent/WO2015037688A1/en
Priority to EP14844912.7A priority patent/EP3045853A1/en
Publication of JP2015055459A publication Critical patent/JP2015055459A/en
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    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • F28D7/163—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing
    • F28D7/1653—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing the conduit assemblies having a square or rectangular shape
    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • F28D7/1684—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation the conduits having a non-circular cross-section
    • 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
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
    • F28D9/0037—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the conduits for the other heat-exchange medium also being formed by paired plates touching each other
    • 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
    • F28F1/025—Tubular elements of cross-section which is non-circular with variable shape, e.g. with modified tube ends, with different geometrical features
    • 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
    • F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-elements
    • F28F9/0221—Header boxes or end plates formed by stacked elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/04—Fastening; Joining by brazing

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

Abstract

PROBLEM TO BE SOLVED: To secure air-tightness and liquid-tightness by eliminating a gap of a joint part of a tank 4 and a core 3.SOLUTION: A flat tube (2) is formed by a pair of plates (2a)(2b) respectively formed into a groove shape, both side walls of each plate (2a)(2b) are formed to project toward a tank (4) from a groove bottom tip edge (1a) of a swollen part (1), so as to form a side protrusion wall (10). Then, when an outer edge (10a) in a swelling direction of the side protrusion wall (10) is aligned in flush with an outer face of the swollen part (1) and respective flat tubes (2) are laminated, respective outer edges (10a) of the adjacent flat tubes (2) come into contact with each other. Also, on a side opposite to the swelling direction, inner ends (10b) of the side protrusion walls (10) of the pair of plates (2a)(2b) forming each flat tube (2) come into contact with each other. Then, tips of a pair of side plate parts (7) of the tank (4) braze contact parts with each other while contacting inside of the side protrusion walls (10) of the respective flat tubes 2.

Description

本発明は、両端が膨出した偏平チューブを積層してなるヘッダープレートレス熱交換器のタンク構造であって、そのコアとタンクとの気密・液密性を改良したものに関する。   The present invention relates to a tank structure of a header plateless heat exchanger formed by laminating flat tubes whose both ends bulge, and relates to an improved air tightness and liquid tightness between the core and the tank.

ヘッダープレートレス熱交換器は、図８及び図９に示す如く、両端が厚み方向に膨出した偏平チューブ２をその膨出部で積層することによりコアを形成し、ヘッダープレートを必要としないものである。そして、偏平チューブ２の積層体からなるコア３の外周にケーシング11を被嵌すると共に、コア３の両端にタンク４を被嵌し、互いに各部品間を一体にろう付け固定したものである。
なお、偏平チューブ２は図９に示す如く、夫々溝形に曲折した（右側省略）一対の上側のプレート2aと下側のプレート2bとを互いに嵌着したものからなる。また、ケーシング11は図８に示す如く、溝形に形成されたケーシング本体11aとその両側壁間を閉塞する端蓋とからなる。さらに、タンク４はプレス成形により横断面方形の筒型に一体成形されたものである。 As shown in FIGS. 8 and 9, the header plateless heat exchanger forms a core by laminating the flat tubes 2 whose both ends bulge in the thickness direction at the bulged portion, and does not require a header plate. It is. The casing 11 is fitted on the outer periphery of the core 3 made of a laminated body of the flat tubes 2, and the tank 4 is fitted on both ends of the core 3 so that the components are integrally brazed and fixed to each other.
As shown in FIG. 9, the flat tube 2 is formed by fitting a pair of an upper plate 2a and a lower plate 2b, which are each bent into a groove shape (omitted on the right side). Further, as shown in FIG. 8, the casing 11 includes a casing main body 11a formed in a groove shape and an end lid that closes between both side walls. Further, the tank 4 is integrally formed into a cylindrical shape having a square cross section by press molding.

特開２０１１−２１３３号公報JP 2011-2133 A 特開２０１１−２３２０２０号公報JP2011-23320A

このようなヘッダープレートレス熱交換器とタンク４とは、ろう付けにより隙間なく接合する必要がある。ところが、偏平チューブ２は、上下一対のプレート2a， 2bの嵌着体からなり、図９に示す如く、その嵌着部Ｂに隙間が生じる。さらに、各偏平チューブ２の積層体の隅Ｃの部分に溝状の隙間が生じる。これは、溝形にプレス成形された各プレート2a，2bのコーナにＲが生じるからである。
さらには、図９においてタンク４と偏平チューブ２との間の部分Ａに隙間が生じ、気密性及び液密性が損なわれる場合がある。それはタンク４がプレス成形により一体形成されているため、成形後に開口部にスプリングバックが生じ、偏平チューブ２とタンク４とを密着し難いことにもとづく。それらの隙間が生じると、ろう付け中にいわゆる、ろう切れが生じ、タンクの気密性及び液密性を損なうことになる。
そこで本発明は、特にタンク４とコア３とのろう付け部に隙間の生じないタンク構造を提供することを課題とする。 Such a header plateless heat exchanger and the tank 4 need to be joined without gaps by brazing. However, the flat tube 2 is composed of a fitting body of a pair of upper and lower plates 2a and 2b, and a gap is generated in the fitting portion B as shown in FIG. Further, a groove-like gap is generated at the corner C of the laminated body of the flat tubes 2. This is because R occurs at the corners of the plates 2a and 2b press-molded into the groove shape.
Furthermore, in FIG. 9, a gap is generated in a portion A between the tank 4 and the flat tube 2, and airtightness and liquid tightness may be impaired. This is based on the fact that since the tank 4 is integrally formed by press molding, a spring back is generated in the opening after molding, and the flat tube 2 and the tank 4 are difficult to adhere to each other. When these gaps occur, so-called brazing occurs during brazing, and the air tightness and liquid tightness of the tank are impaired.
Accordingly, an object of the present invention is to provide a tank structure in which a gap is not generated particularly in a brazed portion between the tank 4 and the core 3.

請求項１に記載の本発明は、両端部が厚み方向に膨出された膨出部(1)を有する複数の偏平チューブ(2)が積層されて、その膨出部(1)で互いに接触固定してコア(3)を形成し、
そのコア(3)の両端に一対のタンク(4)の開口が接続されたヘッダープレートレス熱交換器のタンク構造において、
そのタンク(4)は、前記積層方向の上下両端に位置する上端板部(5)と下端板部(6)と、それらに直交する一対の側板部(7)とで横断面方形に形成され、
前記偏平チューブ(2)は、それぞれ溝形に形成された一対のプレート(2a)(2b)がその溝底を対向して互いに嵌着されたものからなり、その各プレート (2a)(2b)の両側壁は、その溝底先端縁 (1a)よりタンク(4)側に突設されて、側凸壁(10)を形成し、
その側凸壁(10)の膨出方向の外端縁(10a) が前記膨出部(1)の外面に面一に整合して、各偏平チューブ(2)が積層されたとき、隣接する偏平チューブ(2)の各外端縁(10a)どうしが互いに接触し、その膨出方向と反対側では、各偏平チューブ(2)を形成する一対のプレート(2a)(2b)の側凸壁(10)の内端面(10b)が互いに接触され、
前記タンク(4)の一対の側板部(7)の先端部は、各偏平チューブ２の前記側凸壁(10)の内側に接触した状態で、各接触部が互いにろう付け固定されたヘッダープレートレス熱交換器のタンク構造である。 In the present invention according to claim 1, a plurality of flat tubes (2) having a bulging portion (1) whose both end portions bulge in the thickness direction are stacked, and the bulging portions (1) contact each other. Fixed to form the core (3),
In the tank structure of the header plateless heat exchanger in which the openings of the pair of tanks (4) are connected to both ends of the core (3),
The tank (4) is formed in a square cross section with an upper end plate portion (5) and a lower end plate portion (6) positioned at both upper and lower ends in the stacking direction, and a pair of side plate portions (7) orthogonal to them. ,
The flat tube (2) is composed of a pair of plates (2a) (2b) each formed in a groove shape and fitted to each other with their groove bottoms facing each other, and each of the plates (2a) (2b) Both side walls of the groove protrude from the groove bottom end edge (1a) toward the tank (4) to form a side convex wall (10),
When the flat tubes (2) are laminated, the outer edge (10a) in the bulging direction of the side convex wall (10) is flush with the outer surface of the bulging portion (1) and adjacent to each other. The outer edges (10a) of the flat tubes (2) are in contact with each other, and on the side opposite to the bulging direction, the side convex walls of the pair of plates (2a) (2b) that form the flat tubes (2) The inner end faces (10b) of (10) are in contact with each other,
A header plate in which the contact portions are brazed and fixed to each other with the tip portions of the pair of side plate portions (7) of the tank (4) in contact with the inside of the side convex wall (10) of each flat tube 2 It is a tank structure of a less heat exchanger.

請求項２に記載の本発明は、請求項1に記載のヘッダープレートレス熱交換器のタンク構造において、前記コア(3)の外周にケーシング(11)が被嵌され、
前記側凸壁(10)がタンク(4)の側板部(7)とケーシング(11)とで挟持された状態で、互いにろう付け固定されたヘッダープレートレス熱交換器のタンク構造である。
請求項３に記載の本発明は、請求項１または請求項２に記載のヘッダープレートレス熱交換器のタンク構造において、
前記タンク(4)の側板部(7)の先端部が前記側凸壁(10)の厚み分内側に曲折されて、段付き部(7a)を構成し、その段付き部(7a)が側凸壁(10)の内面にろう付け固定されたヘッダープレートレス熱交換器のタンク構造である。 According to a second aspect of the present invention, in the tank structure of the header plateless heat exchanger according to the first aspect, a casing (11) is fitted on the outer periphery of the core (3),
It is a tank structure of a header plateless heat exchanger that is brazed and fixed to each other in a state where the side convex wall (10) is sandwiched between the side plate portion (7) and the casing (11) of the tank (4).
According to a third aspect of the present invention, in the tank structure of the header plateless heat exchanger according to the first or second aspect,
The tip of the side plate portion (7) of the tank (4) is bent inward by the thickness of the side convex wall (10) to form a stepped portion (7a), and the stepped portion (7a) is on the side. This is a tank structure of a header plateless heat exchanger fixed to the inner surface of the convex wall (10) by brazing.

請求項４に記載の本発明は、請求項１〜請求項３のいずれかのヘッダープレートレス熱交換器のタンク構造において、
前記上端板部(5)と下端板部(6)は、前記側板部(7)よりコア(3)側に突出して上嵌入部(8)と下嵌入部(9)とを形成し、その上嵌入部(8)の外面が積層方向の最上段の偏平チューブ(2)の上辺部の内面に接すると共に、下嵌入部(9)の外面が最下段の偏平チューブ(2)の下辺部の内面に接して嵌入され、その嵌入部で偏平チューブ(2)とタンク(4)とが、ろう付け固定されたことを特徴とするヘッダープレートレス熱交換器のタンク構造である。
請求項５に記載の本発明は、請求項１〜請求項４のいずれかのヘッダープレートレス熱交換器のタンク構造において、
側板部(7)と上端板部(5)および下端板部(6)との境で、それらのコア側先端ぶが分離されて、そこに欠切部(15)が形成されたヘッダープレートレス熱交換器のタンク構造である。 According to a fourth aspect of the present invention, in the tank structure of the header plateless heat exchanger according to any one of the first to third aspects,
The upper end plate portion (5) and the lower end plate portion (6) protrude from the side plate portion (7) toward the core (3) to form an upper insertion portion (8) and a lower insertion portion (9), and The outer surface of the upper fitting portion (8) is in contact with the inner surface of the upper side portion of the uppermost flat tube (2) in the stacking direction, and the outer surface of the lower insertion portion (9) is the lower side portion of the lowermost flat tube (2). The header plateless heat exchanger tank structure is characterized in that it is fitted in contact with the inner surface, and the flat tube (2) and the tank (4) are brazed and fixed at the fitted portion.
In the tank structure of the header plateless heat exchanger according to any one of claims 1 to 4,
The header plateless with the core plate tip separated at the boundary between the side plate (7), the upper plate (5) and the lower plate (6), and the notch (15) is formed there. It is a tank structure of a heat exchanger.

請求項１に記載の発明は、偏平チューブ２を構成する各プレート 2a、2bの両側壁が、その膨出部１の溝底先端縁1aよりタンク４側に突設されて、側凸壁10を形成し、タンク４の一対の側板部７の先端部が、各偏平チューブ２の前記側凸壁10の内側に接触した状態で、互いにろう付け固定されたものである。そして、その側凸壁10の膨出方向の外端縁10a が前記膨出部１の外面に面一に整合して、各偏平チューブ２が積層されたとき、隣接する偏平チューブ２の各外端縁10 aどうしが互いに接触し、その膨出方向と反対側では、各偏平チューブ２を形成する一対のプレート2a、2bの側凸壁10の内端面10bが互いに接触したから、その偏平チューブを形成する各プレート2a、2b間の隙間（図９のＢ部）が閉塞される。さらに、各偏平チューブ２間に存在する隙間（図９のＣ部）が閉塞される。また、その内側は側板部７で閉塞される。
その結果、タンク４、コア３、ケーシング11の各部品間のろう付け部の液密性、気密性を確保できる。 According to the first aspect of the present invention, both side walls of the plates 2a and 2b constituting the flat tube 2 are projected from the groove bottom end edge 1a of the bulging portion 1 to the tank 4 side, so that the side convex wall 10 And the tip portions of the pair of side plate portions 7 of the tank 4 are brazed and fixed to each other with the flat tube 2 in contact with the inside of the side convex wall 10. Then, when the flat tubes 2 are laminated so that the outer edge 10a in the bulging direction of the side convex wall 10 is flush with the outer surface of the bulging portion 1, each outer wall of the adjacent flat tubes 2 is laminated. The end edges 10a are in contact with each other, and on the side opposite to the bulging direction, the inner end surfaces 10b of the side convex walls 10 of the pair of plates 2a, 2b forming the flat tubes 2 are in contact with each other. The gaps (B portion in FIG. 9) between the respective plates 2a and 2b forming the are closed. Furthermore, the gap (C portion in FIG. 9) existing between the flat tubes 2 is closed. Further, the inside is closed by the side plate portion 7.
As a result, it is possible to ensure the liquid tightness and air tightness of the brazed portion between the tank 4, the core 3, and the casing 11.

請求項２に記載の発明は、各偏平チューブ２の側凸壁10がタンク４の側板部７とケーシング11とで挟持された状態で、互いにろう付け固定されたものであるから、側凸壁10とタンク４の側板部７との液密性、気密性をより確実に実現できる。
請求項３に記載の発明は、前記タンク４の側板部７の先端部が前記側凸壁10の厚み分内側に曲折されたから、タンク４と側凸壁10との接触部が大きくなり、それらの気密、液密を向上できる。 Since the side convex wall 10 of each flat tube 2 is clamped and fixed to each other in a state where the side convex wall 10 of each flat tube 2 is sandwiched between the side plate portion 7 and the casing 11, the side convex wall Liquid-tightness and airtightness between 10 and the side plate portion 7 of the tank 4 can be realized more reliably.
In the invention according to claim 3, since the tip end portion of the side plate portion 7 of the tank 4 is bent inward by the thickness of the side convex wall 10, the contact portion between the tank 4 and the side convex wall 10 becomes large. Can improve air tightness and liquid tightness.

請求項４に記載の発明は、その側板部７より突出したタンク４の上嵌入部が積層方向の最上段の偏平チューブの上辺部の内面に接すると共に、同様に突出した下嵌入部９が最下段の偏平チューブの下辺部の内面に接して嵌入され、その嵌入部で偏平チューブとタンクとがろう付け固定されたものである。この場合、突出する上嵌入部８および下嵌入部９は変形が容易となり、コア３の偏平チューブ２との接触部を密着することができる。そのため、ろう付け部の液密性、気密性を確保できる。
上記構成に加えて、請求項５に記載のように、欠切部15を側板部７と上端板部５，下端板部６との境に設けた場合には、それら各部の変形が容易となり、各接触部をさらに密着してろう付けの気密性、液密性を確保できる。 In the invention according to claim 4, the upper insertion portion of the tank 4 protruding from the side plate portion 7 is in contact with the inner surface of the upper side portion of the uppermost flat tube in the stacking direction, and the lower insertion portion 9 protruding in the same manner is the highest. The flat tube is inserted into contact with the inner surface of the lower side of the lower flat tube, and the flat tube and the tank are brazed and fixed at the inserted portion. In this case, the protruding upper insertion portion 8 and lower insertion portion 9 can be easily deformed, and the contact portion of the core 3 with the flat tube 2 can be brought into close contact. Therefore, the liquid tightness and air tightness of the brazing part can be secured.
In addition to the above configuration, when the notch 15 is provided at the boundary between the side plate portion 7 and the upper end plate portion 5 and the lower end plate portion 6 as described in claim 5, the deformation of each portion is facilitated. Further, it is possible to secure the airtightness and liquid tightness of brazing by further bringing the contact portions into close contact.

本発明のヘッダープレートレス熱交換器のタンク構造の分解斜視図。The disassembled perspective view of the tank structure of the header plateless heat exchanger of this invention. （Ａ）はその偏平チューブ２の要部分解図、（Ｂ）は（Ａ）のＢ部拡大図、（Ｃ）はその偏平チューブ２の組み合わせ状態を示す要部斜視図。(A) is the principal part exploded view of the flat tube 2, (B) is the B section enlarged view of (A), (C) is the principal part perspective view which shows the combined state of the flat tube 2. FIG. 同タンク４と偏平チューブ２との組立て説明図。The assembly explanatory drawing of the tank 4 and the flat tube 2. FIG. 同組立て状態を示す要部斜視図。The principal part perspective view which shows the same assembly state. 同縦断面図。FIG. 図５のVI−VI矢視図。VI-VI arrow line view of FIG. 本発明の第２実施例のタンク４と偏平チューブ２との組立て説明図。The assembly explanatory drawing of the tank 4 and the flat tube 2 of 2nd Example of this invention. 従来型ヘッダープレートレス熱交換器のタンク構造の要部縦断面図。The principal part longitudinal cross-sectional view of the tank structure of the conventional header plateless heat exchanger. 図７のIX−IX断面拡大図。IX-IX cross-sectional enlarged view of FIG.

次に、図面に基づいて本発明の実施の形態につき説明する。
この熱交換器は、図１に示す如く、多数の偏平チューブ２をその両端の膨出部１で積層しコア３を形成する。その膨出部を除いた部分は、各偏平チューブ２間に隙間を生じ、そこへ冷却水が供給される。その偏平チューブ２は、図２に示す如く、夫々溝形に形成された上側のプレート2aと下側のプレート2bとの嵌着体からなる。そして、下側のプレート2bの側壁の上部は、上側プレート2aの板厚分内側に曲折した段付きに成形されて、そこに段付き部2cを形成する。そして、上側のプレート2aの内側に下側のプレート2bの上端部が嵌着する。それらプレート2a，プレート2bの長手方向両端部は、厚み方向に膨出された膨出部１を有し、その両側壁の先端部が、各プレート2a、2bの溝底の上辺、下辺の溝底先端縁1aより外方に突出し、一対の側凸壁10を形成する。なお下側プレート2bの側壁の段付き部2cの先端は、上側プレート2aの溝底の下辺と整合する。 Next, embodiments of the present invention will be described with reference to the drawings.
In this heat exchanger, as shown in FIG. 1, a large number of flat tubes 2 are laminated at the bulging portions 1 at both ends to form a core 3. Except for the bulging portion, a gap is formed between the flat tubes 2, and cooling water is supplied thereto. As shown in FIG. 2, the flat tube 2 is formed by fittings of an upper plate 2a and a lower plate 2b each formed in a groove shape. Then, the upper part of the side wall of the lower plate 2b is formed into a stepped portion bent inward by the thickness of the upper plate 2a to form a stepped portion 2c therein. The upper end portion of the lower plate 2b is fitted inside the upper plate 2a. Both ends in the longitudinal direction of the plates 2a and 2b have a bulging portion 1 bulging in the thickness direction, and the tip portions of both side walls are grooves on the upper and lower sides of the groove bottoms of the plates 2a and 2b. Projecting outward from the bottom end edge 1a, a pair of side convex walls 10 are formed. The tip of the stepped portion 2c on the side wall of the lower plate 2b is aligned with the lower side of the groove bottom of the upper plate 2a.

その側凸壁10の上下方向の外端縁10aが膨出部１の外面に面一に整合して、各偏平チューブ２が積層されたとき、隣接する偏平チューブ２の各外端縁10aどうしが互いに隙間なく接触する。また、その膨出方向と反対側では、各偏平チューブ２を形成する一対のプレート2a、2bの側凸壁10の内端面10bが互いに隙間なく接触される。
そして、プレート2a， 2bは、図２（Ｂ）（Ｃ）の如く嵌着されて偏平チューブ２を形成する。この例では偏平チューブ２内にはインナーフィン13が図１に示す如く、介装されている。
次に、ケーシング11は、図１に示す如く、溝形に形成されたケーシング本体11aとその両側壁間を閉塞する端蓋11bとからなる。端蓋11bは、ケーシング本体11aの外周に整合する浅い溝形に形成されている。 When the flat tubes 2 are laminated so that the vertical outer end edges 10a of the side convex walls 10 are flush with the outer surface of the bulging portion 1, the outer end edges 10a of the adjacent flat tubes 2 are adjacent to each other. Touch each other without gaps. Further, on the side opposite to the bulging direction, the inner end surfaces 10b of the side convex walls 10 of the pair of plates 2a and 2b forming each flat tube 2 are in contact with each other without any gap.
The plates 2a and 2b are fitted as shown in FIGS. 2B and 2C to form the flat tube 2. In this example, an inner fin 13 is interposed in the flat tube 2 as shown in FIG.
Next, as shown in FIG. 1, the casing 11 includes a casing main body 11a formed in a groove shape and an end lid 11b that closes between both side walls thereof. The end lid 11b is formed in a shallow groove shape that matches the outer periphery of the casing body 11a.

次に、タンク４はプレス機械により一体成形されたものからなり、図１に示す如く、全体が浅い漏斗状に形成され、その一端開口が円形に、他端開口が方形に形成されている。
そして、上下に対向する上端板部５と下端板部６と、その両側に配置された一対の側板部７とにより横断面方形に形成されている。さらに、上端板部５，下端板部６には、偏平チューブ２の板厚分だけ内側に段付きに形成された上嵌入部８及び下嵌入部９が設けられ、それが側板部７よりコア３側に突出する。その上嵌入部８，下嵌入部９の幅は、偏平チューブ２の内幅に整合する。また、タンク４の両側板部７には、偏平チューブ２の板厚分内側に曲折した一対の段付き部7aが突出する。段付き部7a間の外幅は、偏平チューブ２の左右の側凸壁10間の内幅に整合する。また、段付き部7aと上嵌入部８，下嵌入部９との境は、欠切部15によって分離され、それにより上嵌入部８，下嵌入部９，段付き部7aは、夫々弾性変形可能に形成されている。 Next, the tank 4 is integrally formed by a press machine, and as shown in FIG. 1, the entire tank 4 is formed in a shallow funnel shape, with one end opening formed in a circular shape and the other end opening formed in a square shape.
And it is formed in the cross-sectional square by the upper end board part 5 and the lower end board part 6 which oppose up and down, and a pair of side board part 7 arrange | positioned at the both sides. Further, the upper end plate portion 5 and the lower end plate portion 6 are provided with an upper insertion portion 8 and a lower insertion portion 9 that are stepped on the inner side by the thickness of the flat tube 2. Projects to the 3 side. The widths of the upper insertion portion 8 and the lower insertion portion 9 match the inner width of the flat tube 2. In addition, a pair of stepped portions 7 a that are bent inwardly by the thickness of the flat tube 2 protrude from both side plate portions 7 of the tank 4. The outer width between the stepped portions 7a matches the inner width between the left and right side convex walls 10 of the flat tube 2. Further, the boundary between the stepped portion 7a and the upper fitting portion 8 and the lower fitting portion 9 is separated by a notch 15 so that the upper fitting portion 8, the lower fitting portion 9 and the stepped portion 7a are elastically deformed, respectively. It is made possible.

このようにしてなるタンク４は、図３及び図４に示す如く、その上嵌入部８がコア３の積層方向最上段の偏平チューブ２のプレート2aの内側に嵌入し、下嵌入部９が積層方向最下段の偏平チューブ２のプレート2bに接触して嵌入される。それと共に、一対の側壁７の段付き部7aは、各偏平チューブ２の側凸壁10の内側に嵌入する。その段付き部7aの先端縁は、図５に示す如く、各プレート2a、2bの端縁1aおよび下側プレート2bの側壁の段付き部2cの先端2d（図２）に当接する。そして、図４、図５の如く組立てられる。各部品の接触部間には予め、ろう材が被覆又は塗布される。そして、図５において、ケーシング本体11aが上方から、端蓋11bが下方からコア３及びタンク４に被嵌される。すると、最上段の偏平チューブ２の上側のプレート2aの端部は、タンク４の上嵌入部８とケーシング本体11aとに挟持される。また、最下段の偏平チューブ２の下側のプレート2bの端部は、タンク４の下嵌入部９と端蓋11bとに挟持される。さらに、各偏平チューブ２の側凸壁10も図６の如く、段付き部7aとケーシング11とに挟持される。   As shown in FIGS. 3 and 4, the tank 4 formed in this way has an upper fitting portion 8 fitted inside the plate 2 a of the flat tube 2 at the top of the stacking direction of the core 3, and a lower fitting portion 9 laminated. The flat tube 2 at the bottom in the direction is inserted into contact with the plate 2b of the flat tube 2. At the same time, the stepped portions 7 a of the pair of side walls 7 are fitted inside the side convex walls 10 of the flat tubes 2. As shown in FIG. 5, the leading edge of the stepped portion 7a comes into contact with the edge 1a of each plate 2a, 2b and the tip 2d (FIG. 2) of the stepped portion 2c on the side wall of the lower plate 2b. And it assembles like FIG. 4, FIG. A brazing material is coated or applied in advance between the contact portions of each component. In FIG. 5, the casing body 11 a is fitted onto the core 3 and the tank 4 from above and the end lid 11 b is fitted from below. Then, the end of the upper plate 2a of the uppermost flat tube 2 is sandwiched between the upper fitting portion 8 of the tank 4 and the casing body 11a. Further, the end of the lower plate 2b on the lowermost flat tube 2 is sandwiched between the lower fitting portion 9 of the tank 4 and the end lid 11b. Further, the side convex wall 10 of each flat tube 2 is also sandwiched between the stepped portion 7a and the casing 11 as shown in FIG.

そして、ろう付け時には、それらが互いに密着した状態でろう付けされる。このとき、上嵌入部８及び下嵌入部９，段付き部7aは、夫々欠切部15の存在により弾性変形し、互いに隣接する部品間が密着状態でろう付けされる。そのためには、ケーシング11の外周を図示しない治具で、内側に締結してろう付けする。すると、タンク４と各偏平チューブ２との間に隙間が生じることなく、気密性及び液密性を確保できる。そして、従来の熱交換器における図９のＡ，Ｂ，Ｃの隙間が夫々閉塞され、気密性及び液密性が確保される。即ち、図９のＡ部は上嵌入部８及び下嵌入部９，段付き部7aの弾性変形により偏平チューブ２の内面に密着する。また図９のＢ部は、各偏平チューブ２が積層されたとき、隣接する偏平チューブ２の各外端縁10 aどうしが互いに接触し、隙間がない。   And at the time of brazing, they are brazed in the state which mutually contact | adhered. At this time, the upper insertion portion 8, the lower insertion portion 9, and the stepped portion 7 a are elastically deformed due to the presence of the notch portions 15, respectively, and the adjacent components are brazed together. For this purpose, the outer periphery of the casing 11 is fastened and brazed inside with a jig (not shown). Then, airtightness and liquid-tightness can be ensured without generating a gap between the tank 4 and each flat tube 2. And the clearance gap of A, B, C of FIG. 9 in the conventional heat exchanger is each obstruct | occluded, and airtightness and liquid tightness are ensured. That is, the portion A in FIG. 9 is in close contact with the inner surface of the flat tube 2 due to the elastic deformation of the upper insertion portion 8, the lower insertion portion 9, and the stepped portion 7a. 9B, when the flat tubes 2 are laminated, the outer end edges 10a of the adjacent flat tubes 2 are in contact with each other, and there is no gap.

その膨出方向と反対側では、各偏平チューブ２を形成する一対のプレート2a，2bの側凸壁10の内端面10bが互いに接触しているから、そこにも隙間がない。さらに、その偏平チューブを形成する各プレート2a、2b間の内側（図９のＢ部）をタンク４の側板部７が閉塞する。さらに、その側板部７は各偏平チューブ２間の図９のＣ部の内側も閉塞する。
なお、ケーシング11は図１に示す如く、そのケーシング本体11aの長手方向両端部に冷却水出入口12が形成され、そこから冷却水が流入して、それが各偏平チューブ２間に供給される。また、一方のタンク４側から一例として高温の排ガスが流入し、各偏平チューブ２内を流通して冷却水との間に熱交換が行われる。 On the side opposite to the bulging direction, the inner end surfaces 10b of the side convex walls 10 of the pair of plates 2a and 2b forming each flat tube 2 are in contact with each other, so there is no gap there. Further, the side plate portion 7 of the tank 4 closes the inside (B portion in FIG. 9) between the plates 2a and 2b forming the flat tube. Further, the side plate portion 7 also closes the inside of the portion C in FIG. 9 between the flat tubes 2.
As shown in FIG. 1, the casing 11 has cooling water inlets / outlets 12 formed at both ends in the longitudinal direction of the casing body 11 a, from which cooling water flows and is supplied between the flat tubes 2. Further, as an example, high-temperature exhaust gas flows from one tank 4 side, and flows through each flat tube 2 to exchange heat with cooling water.

次に、図７は、本発明の第２実施例のタンク４と偏平チューブ２との組立て説明図である。この例が図３のそれと異なる点は、欠切部15の位置のみである。この例の欠切部15はタンク４の上端板部５および下端板部６の各平面に形成されている。その欠切部15の存在により、段付き部7aの成形および上嵌入部８、下嵌入部９の成形を容易にしている。   Next, FIG. 7 is an assembly explanatory view of the tank 4 and the flat tube 2 according to the second embodiment of the present invention. This example is different from that of FIG. 3 only in the position of the notch 15. The notch 15 in this example is formed in each plane of the upper end plate 5 and the lower end plate 6 of the tank 4. The presence of the notch 15 facilitates the formation of the stepped portion 7a and the formation of the upper insertion portion 8 and the lower insertion portion 9.

１ 膨出部
1a 溝底先端縁
２ 偏平チューブ
2a プレート
2b プレート
2c 段付き部
2d 先端縁
３ コア
４ タンク
５ 上端板部
６ 下端板部
７ 側板部
7a 段付き部 1 bulge
1a Groove bottom edge 2 Flat tube
2a plate
2b plate
2c Stepped part
2d Tip edge 3 Core 4 Tank 5 Upper plate 6 Lower plate 7 Side plate
7a Stepped part

８ 上嵌入部
９ 下嵌入部
10 側凸壁
10a 外端縁
10b 内端縁
11 ケーシング
11a ケーシング本体
11b 端蓋
12 冷却水出入口
13 インナーフィン
15 欠切部 8 Upper insertion part 9 Lower insertion part
10 side convex wall
10a Outer edge
10b Inner edge
11 Casing
11a Casing body
11b end cover
12 Cooling water inlet / outlet
13 Inner fin
15 Notch

Claims (5)

両端部が厚み方向に膨出された膨出部(1)を有する複数の偏平チューブ(2)が積層されて、その膨出部(1)で互いに接触固定してコア(3)を形成し、
そのコア(3)の両端に一対のタンク(4)の開口が接続されたヘッダープレートレス熱交換器のタンク構造において、
そのタンク(4)は、前記積層方向の上下両端に位置する上端板部(5)と下端板部(6)と、それらに直交する一対の側板部(7)とで横断面方形に形成され、
前記偏平チューブ(2)は、それぞれ溝形に形成された一対のプレート(2a)(2b)がその溝底を対向して互いに嵌着されたものからなり、その各プレート (2a)(2b)の両側壁は、その溝底先端縁 (1a)よりタンク(4)側に突設されて、側凸壁(10)を形成し、
その側凸壁(10)の膨出方向の外端縁(10a) が前記膨出部(1)の外面に面一に整合して、各偏平チューブ(2)が積層されたとき、隣接する偏平チューブ(2)の各外端縁(10a)どうしが互いに接触し、
その膨出方向と反対側では、各偏平チューブ(2)を形成する一対のプレート(2a)(2b)の側凸壁(10)の内端面(10b)が互いに接触され、
前記タンク(4)の一対の側板部(7)の先端部は、各偏平チューブ２の前記側凸壁(10)の内側に接触した状態で、各接触部が互いにろう付け固定されたヘッダープレートレス熱交換器のタンク構造。 A plurality of flat tubes (2) having a bulging portion (1) whose both end portions bulge in the thickness direction are laminated, and the bulging portion (1) is fixed in contact with each other to form a core (3). ,
In the tank structure of the header plateless heat exchanger in which the openings of the pair of tanks (4) are connected to both ends of the core (3),
The tank (4) is formed in a square cross section with an upper end plate portion (5) and a lower end plate portion (6) positioned at both upper and lower ends in the stacking direction, and a pair of side plate portions (7) orthogonal to them. ,
The flat tube (2) is composed of a pair of plates (2a) (2b) each formed in a groove shape and fitted to each other with their groove bottoms facing each other, and each of the plates (2a) (2b) Both side walls of the groove protrude from the groove bottom end edge (1a) toward the tank (4) to form a side convex wall (10),
When the flat tubes (2) are laminated, the outer edge (10a) in the bulging direction of the side convex wall (10) is flush with the outer surface of the bulging portion (1) and adjacent to each other. The outer end edges (10a) of the flat tube (2) are in contact with each other,
On the opposite side to the bulging direction, the inner end faces (10b) of the side convex walls (10) of the pair of plates (2a) (2b) forming each flat tube (2) are in contact with each other,
A header plate in which the contact portions are brazed and fixed to each other with the tip portions of the pair of side plate portions (7) of the tank (4) in contact with the inside of the side convex wall (10) of each flat tube 2 Less heat exchanger tank structure. 請求項１に記載のヘッダープレートレス熱交換器のタンク構造において、
前記コア(3)の外周にケーシング(11)が被嵌され、
前記側凸壁(10)が、タンク(4)の側板部(7)とケーシング(11)とで挟持された状態で、互いにろう付け固定されたヘッダープレートレス熱交換器のタンク構造。 In the tank structure of the header plateless heat exchanger according to claim 1,
A casing (11) is fitted on the outer periphery of the core (3),
A tank structure of a header plateless heat exchanger in which the side convex wall (10) is brazed and fixed to each other in a state where the side convex wall (10) is sandwiched between a side plate portion (7) and a casing (11) of the tank (4). 請求項１または請求項２に記載のヘッダープレートレス熱交換器のタンク構造において、
前記タンク(4)の側板部(7)の先端部が前記側凸壁(10)の厚み分内側に曲折されて、段付き部(7a)を構成し、その段付き部(7a)が側凸壁(10)の内面にろう付け固定されたヘッダープレートレス熱交換器のタンク構造。 In the tank structure of the header plateless heat exchanger according to claim 1 or 2,
The tip of the side plate portion (7) of the tank (4) is bent inward by the thickness of the side convex wall (10) to form a stepped portion (7a), and the stepped portion (7a) is on the side. Tank structure of header plateless heat exchanger fixed to the inner surface of the convex wall (10) by brazing. 請求項１〜請求項３のいずれかのヘッダープレートレス熱交換器のタンク構造において、
前記上端板部(5)と下端板部(6)は、前記側板部(7)よりコア(3)側に突出して上嵌入部(8)と下嵌入部(9)とを形成し、その上嵌入部(8)の外面が積層方向の最上段の偏平チューブ(2)の上辺部の内面に接すると共に、下嵌入部(9)の外面が最下段の偏平チューブ(2)の下辺部の内面に接して嵌入され、その嵌入部で偏平チューブ(2)とタンク(4)とが、ろう付け固定されたことを特徴とするヘッダープレートレス熱交換器のタンク構造。 In the tank structure of the header plateless heat exchanger according to any one of claims 1 to 3,
The upper end plate portion (5) and the lower end plate portion (6) protrude from the side plate portion (7) toward the core (3) to form an upper insertion portion (8) and a lower insertion portion (9), and The outer surface of the upper fitting portion (8) is in contact with the inner surface of the upper side portion of the uppermost flat tube (2) in the stacking direction, and the outer surface of the lower insertion portion (9) is the lower side portion of the lowermost flat tube (2). A header plateless heat exchanger tank structure, wherein the flat tube (2) and the tank (4) are brazed and fixed in contact with the inner surface. 請求項１〜請求項４のいずれかのヘッダープレートレス熱交換器のタンク構造において、
側板部(7)と上端板部(5)および下端板部(6)との境で、それらのコア側先端部が分離されて、そこに欠切部(15)が形成されたヘッダープレートレス熱交換器のタンク構造。 In the tank structure of the header plateless heat exchanger according to any one of claims 1 to 4,
The header plateless with the core side tip part separated at the boundary between the side plate part (7), the upper end plate part (5) and the lower end plate part (6), and the notch part (15) formed there Heat exchanger tank structure.
JP2013190837A 2013-09-13 2013-09-13 Tank structure of header plate-less heat exchanger Pending JP2015055459A (en)

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JP2019117032A (en) * 2017-12-27 2019-07-18 株式会社ティラド Header-plate-less heat exchanger
JP6991855B2 (en) 2017-12-27 2022-01-13 株式会社ティラド Header plateless heat exchanger
EP3982075A4 (en) * 2019-06-10 2023-06-07 T.RAD Co., Ltd. Heat exchanger

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