JP5486239B2 - Header plateless heat exchanger - Google Patents

Header plateless heat exchanger Download PDF

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JP5486239B2
JP5486239B2 JP2009189427A JP2009189427A JP5486239B2 JP 5486239 B2 JP5486239 B2 JP 5486239B2 JP 2009189427 A JP2009189427 A JP 2009189427A JP 2009189427 A JP2009189427 A JP 2009189427A JP 5486239 B2 JP5486239 B2 JP 5486239B2
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core
header
heat exchanger
flat tube
plate
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JP2011038752A (en
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謙 柳川
範行 樋代
大輔 諏訪下
真樹 斎藤
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T.RAD CO., L T D.
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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
    • 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
    • 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

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

Description

本発明は、ＥＧＲクーラ等に用いられるヘッダプレートレス型の熱交換器に関し、特に積層される偏平チューブ間に形成されるヘッダ側の隙間を、確実に閉塞できる構造の簡単なものに関する。   The present invention relates to a header plateless type heat exchanger used for an EGR cooler or the like, and more particularly to a simple structure having a structure capable of reliably closing a gap on the header side formed between stacked flat tubes.

両端部が膨出した偏平チューブを積層してコアを構成し、そのコア外周にケーシングを被嵌したヘッダプレートレス型の熱交換器につき、ケーシングとコアとの隙間を閉塞する提案が下記特許文献に記載されている。
これらはいずれも、図９に示すごとく、互いに溝型に形成された一対の溝型プレート２、溝型プレート３を互いに逆向きに重ね合わせて偏平チューブ４を形成し、その偏平チューブ４の両端部が厚み方向に膨出されている。このような偏平チューブ４を積層してコア５を形成し、そのコア５外周にケーシング６を被嵌したものである。そのコア５の端部はケーシング６により閉塞され、ヘッダ側よりみて隙間がないとされる。そして、コア５の長手方向両端にヘッダが配置され、コア５の中間部外面には第２流体が流通するものである。 The following patent document proposes to close a gap between a casing and a core for a header plateless type heat exchanger in which a flat tube with both ends bulging is laminated to form a core and a casing is fitted around the core. It is described in.
As shown in FIG. 9, each of these forms a flat tube 4 by stacking a pair of groove plates 2 and 3 formed in a groove shape in opposite directions to each other, and both ends of the flat tube 4 The part is bulged in the thickness direction. Such a flat tube 4 is laminated to form a core 5, and a casing 6 is fitted on the outer periphery of the core 5. The end of the core 5 is closed by the casing 6 so that there is no gap when viewed from the header side. Then, headers are arranged at both ends in the longitudinal direction of the core 5, and the second fluid flows through the outer surface of the intermediate portion of the core 5.

ＷＯ ２００６／１０２７３６ Ａ１WO 2006/102736 A1 特開２００７−２２５１９０号公報JP 2007-225190 A

コア５の長手方向両端部は、ケーシング６により閉塞するとされているものの、実際には図９のごとく、各偏平チューブ４の幅方向両端において、隙間１３が形成される。すると、ヘッダ側の流体がこの隙間１３を介してケーシング内部に漏れるおそれがある。
そこで、本発明は係る隙間１３を完全に閉塞する構造の簡単なヘッダプレートレス型の熱交換器を提供することを課題とする。 Although both ends in the longitudinal direction of the core 5 are closed by the casing 6, the gaps 13 are actually formed at both ends in the width direction of each flat tube 4 as shown in FIG. 9. Then, the fluid on the header side may leak through the gap 13 into the casing.
Then, this invention makes it a subject to provide the simple header plateless type heat exchanger of the structure which obstruct | occludes the said clearance gap 13 completely.

請求項１に記載の本発明は、それぞれ、その長手方向の両端部の側壁(1)の高さが、他の部分より高く形成された第１の溝型プレート(2)と第２の溝型プレート(3)とを有し、第１の溝型プレート(2)の内側に第２の溝型プレート(3)を位置して、互いに逆向きにして嵌着し、その両端部に膨出部(14)を有する偏平チューブ(4)が形成され、
複数の偏平チューブ(4)を積層してコア(5)が形成され、
そのコア(5)は、前記膨出部(14)の位置で、各偏平チューブ(4)の隣接部のコーナに隙間(13)が生じ、
そのコア(5)の外周にケーシング(6)が被嵌され、コア(5)の両端の延長上にヘッダ部(7)が配置されるヘッダプレートレス型の熱交換器において、
前記偏平チューブ(4)の側壁(1)の側で、その長手方向両端縁に隣接し、前記ヘッダ部(7) の内面に凸条(8)が、第１の溝型プレート(2)と第２の溝型プレート(3)の各板厚の和以上の高さにプレス成形され、その凸条(8)が各偏平チューブ(4)間に形成される前記隙間(13)を埋めるように被嵌され、その凸条(8)と各偏平チューブ(4)とが一体にろう付けされたヘッダプレートレス型の熱交換器である。 The present invention according to claim 1 is the first groove-type plate (2) and the second groove in which the height of the side wall (1) at both ends in the longitudinal direction is higher than that of the other portions. The second groove mold plate (3) is located inside the first groove mold plate (2) and is fitted in opposite directions, and swelled at both ends thereof. A flat tube (4) having a protrusion (14) is formed,
A core (5) is formed by laminating a plurality of flat tubes (4),
The core (5) has a gap (13) at the corner of the adjacent portion of each flat tube (4) at the position of the bulging portion (14),
In the header plateless type heat exchanger in which the casing (6) is fitted on the outer periphery of the core (5) and the header portion (7) is arranged on the extension of both ends of the core (5),
On the side of the flat tube (4) on the side wall (1) side, adjacent to both longitudinal edges thereof, a ridge (8) is formed on the inner surface of the header portion (7) with the first groove plate (2). are pressed into the thickness sum over the height of the second grooved plate (3), so as to fill the gap (13) formed between the ridges (8) are each flat tubes (4) Is a header plateless type heat exchanger in which the ridges (8) and the flat tubes (4) are brazed together.

本発明の熱交換器は、ヘッダプレートを有しないものにおいて、積層される複数の偏平チューブ４間に形成される隙間１３が、ヘッダ部７内面にプレス成形された凸条８により埋められ、その凸条８と偏平チューブ４とが一体にろう付けされるので、ヘッダ部７内の流体が隙間１３からケーシング側に漏れることを簡単な構造で防止することができる。
即ち、前記ヘッダ部７の内面に凸条８が、第１の溝型プレート２と第２の溝型プレート３の各板厚の和以上の高さにプレス成形されたので、偏平チューブ４間に形成される隙間１３を完全になくすことができる。 In the heat exchanger of the present invention that does not have a header plate, a gap 13 formed between a plurality of stacked flat tubes 4 is filled with a ridge 8 that is press-molded on the inner surface of the header portion 7. Since the ridge 8 and the flat tube 4 are brazed together, it is possible to prevent the fluid in the header portion 7 from leaking from the gap 13 to the casing side with a simple structure.
That is, since the ridges 8 are press-formed on the inner surface of the header portion 7 to a height higher than the sum of the thicknesses of the first groove plate 2 and the second groove plate 3, It is possible to completely eliminate the gap 13 formed in the above.

本発明の熱交換器の縦断面図。The longitudinal cross-sectional view of the heat exchanger of this invention. 同熱交換器の要部分解図。The principal part exploded view of the heat exchanger. 図１のIII−III矢視断面拡大図。FIG. 3 is an enlarged sectional view taken along the line III-III in FIG. 1. 同熱交換器の要部斜視図。The principal part perspective view of the same heat exchanger. 本発明の第２実施形態を示し、図３と同一の方向から見たものThe second embodiment of the present invention is seen from the same direction as FIG. 同第３実施形態の横断面図。The cross-sectional view of the third embodiment. 第２の本発明の縦断面図。The longitudinal cross-sectional view of 2nd this invention. 図７のVIII−VIII矢視断面図。VIII-VIII arrow sectional drawing of FIG. 従来型熱交換器の説明図であって、ヘッダ側からみた側面図。It is explanatory drawing of the conventional type heat exchanger, Comprising: The side view seen from the header side.

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。
本発明は、この例では第１流体を第２流体により冷却する熱交換器であって、ヘッダにヘッダプレートを設けないものである。
そして、図２に示すごとく、各偏平チューブ４は、一対の溝型プレート２、３を逆向きに嵌着して形成したものであり、その各プレート２、３はその長手方向両端部の側壁１の高さが他の部分より高く形成され、その結果、偏平チューブ４の両端に膨出部１４を形成するものである。
また、各溝型プレート２、３の中間部の外面側には膨出部１４の高さ分だけディンプル１２が多数、互いに離間して突設形成されている。その各偏平チューブ４にはインナーフィン１５が介装される。このようにしてなる偏平チューブ４が、互いに積層されてコア５を構成する。 Next, embodiments of the present invention will be described with reference to the drawings.
In this example, the present invention is a heat exchanger that cools the first fluid with the second fluid, and does not include a header plate on the header.
As shown in FIG. 2, each flat tube 4 is formed by fitting a pair of groove-type plates 2 and 3 in opposite directions, and each plate 2 and 3 has side walls at both ends in the longitudinal direction. The height of 1 is formed higher than the other portions, and as a result, the bulging portions 14 are formed at both ends of the flat tube 4.
In addition, a large number of dimples 12 are formed on the outer surface side of the intermediate portion of each of the groove-type plates 2 and 3 so as to be spaced apart from each other by the height of the bulging portion 14. Each flat tube 4 is provided with an inner fin 15. The flat tubes 4 formed in this way are laminated together to form the core 5.

次に、このコア５が収納されるケーシング６は、図１および図２示すごとく、両端にヘッダ部７を有する箱状に形成されたケーシング本体６ａと、その上端開口を閉塞する上蓋６ｂとからなる。
そのケーシング本体６ａには、コア５の両側縁の開口に隣接して凸条８がプレス成形により形成されている。この凸条８は、その端面８ａが少なくとも溝型プレート２の板厚以上に形成され、それが偏平チューブ４の端面４ａを閉塞することにより、偏平チューブ４間の隙間１３を埋めるように被蔽される。そのために、ケーシング６の板厚は溝型プレート２、３のそれよりも十分厚く（一例として数倍以上）、プレス機械により、いわゆる半切り状態にされて、断面三角の凸条８が形成される。その凸条８は、図１に示すごとく、その下端から上端または、上端近傍まで連続形成される。
そして、ろう付けにより、ヘッダ部７側よりみて、各偏平チューブ４間および偏平チューブ４の端面４ａと凸条８の端面８ａとの間が気密に接合される。 Next, as shown in FIGS. 1 and 2, the casing 6 in which the core 5 is accommodated is composed of a casing body 6a formed in a box shape having header portions 7 at both ends, and an upper lid 6b that closes the upper end opening. Become.
On the casing body 6a, ridges 8 are formed by press molding adjacent to the openings on both side edges of the core 5. The ridge 8 has an end face 8a formed at least equal to or greater than the thickness of the grooved plate 2, and closes the end face 4a of the flat tube 4 so that the gap 13 between the flat tubes 4 is covered. Is done. For this purpose, the plate thickness of the casing 6 is sufficiently thicker than that of the groove-type plates 2 and 3 (as an example, several times or more), and is cut into a half-cut state by a press machine, thereby forming a ridge 8 having a triangular cross section. The As shown in FIG. 1, the ridge 8 is continuously formed from the lower end to the upper end or near the upper end.
Then, by brazing, between the flat tubes 4 and between the end surfaces 4a of the flat tubes 4 and the end surfaces 8a of the ridges 8 are airtightly joined as viewed from the header portion 7 side.

そして、ケーシング本体６ａの長手方向両端の各ヘッダ部７には一対の第１流体出入口１１が形成されると共に、凸条８よりも中心側で、そのケーシング本体６ａの側部外面には一対づつの第２流体出入口１０が形成される。なお、各偏平チューブ４の外面に突設されたディンプル１２は互いに接触し、各部品の各接触部間が一体にろう付け接合される。   A pair of first fluid inlets / outlets 11 is formed in each header portion 7 at both ends in the longitudinal direction of the casing body 6a, and a pair of first fluid inlet / outlet ports are provided at the center side of the ridges 8 and on the outer side surface of the casing body 6a. The second fluid inlet / outlet port 10 is formed. The dimples 12 projecting from the outer surface of each flat tube 4 come into contact with each other, and the respective contact portions of each component are integrally brazed and joined.

このようにしてなる熱交換器は、一方のヘッダ部７の第１流体出入口１１から第１流体が流入し、各偏平チューブ４内部を流通して、他方のヘッダ部７からそれが流出する。そして、コア５の外周には一方の第２流体出入口１０を介して第２流体が流入し、それが他方の第２流体出入口１０から流出し、第１流体と第２流体との間に熱交換が行われるものである。   In the heat exchanger thus configured, the first fluid flows in from the first fluid inlet / outlet port 11 of one header portion 7, flows through each flat tube 4, and flows out from the other header portion 7. Then, the second fluid flows into the outer periphery of the core 5 through one second fluid inlet / outlet 10, flows out from the other second fluid inlet / outlet 10, and heat is generated between the first fluid and the second fluid. Exchange is to be performed.

次に、図５は本発明の第２の実施の形態を示し、この例では凸条８の横断面の頂部が円弧状に形成されている。そして、その付根部により偏平チューブ４の端面４ａを被蔽するものである。
次に、図６の例は、凸条８が横断面方形に形成され、その偏平チューブ４側端面が偏平チューブ４の端面４ａを被蔽するものである。 Next, FIG. 5 shows a second embodiment of the present invention. In this example, the top of the cross section of the ridge 8 is formed in an arc shape. And the end surface 4a of the flat tube 4 is covered by the root part.
Next, in the example of FIG. 6, the ridges 8 are formed in a square cross section, and the end surface on the flat tube 4 side covers the end surface 4 a of the flat tube 4.

１ 側壁
２ 溝型プレート
３ 溝型プレート
４ 偏平チューブ
4a 端面
５ コア
６ ケーシング
6a ケーシング本体
6b 上蓋 1 side wall 2 groove plate 3 groove plate 4 flat tube
4a End face 5 Core 6 Casing
6a Casing body
6b Top cover

７ ヘッダ部
８ 凸条
8a 端面
９ タンク本体
9a 端面
10 第２流体出入口
11 第１流体出入口
12 ディンプル
13 隙間
14 膨出部
15 インナーフィン 7 Header part 8 Projection
8a End face 9 Tank body
9a End face
10 Second fluid inlet / outlet
11 First fluid inlet / outlet
12 dimples
13 Clearance
14 bulge
15 Inner fin

Claims (1)

それぞれ、その長手方向の両端部の側壁(1)の高さが、他の部分より高く形成された第１の溝型プレート(2)と第２の溝型プレート(3)とを有し、第１の溝型プレート(2)の内側に第２の溝型プレート(3)を位置して、互いに逆向きにして嵌着し、その両端部に膨出部(14)を有する偏平チューブ(4)が形成され、
複数の偏平チューブ(4)を積層してコア(5)が形成され、
そのコア(5)は、前記膨出部(14)の位置で、各偏平チューブ(4)の隣接部のコーナに隙間(13)が生じ、
そのコア(5)の外周にケーシング(6)が被嵌され、コア(5)の両端の延長上にヘッダ部(7) が配置されるヘッダプレートレス型の熱交換器において、
前記偏平チューブ(4)の側壁(1)の側で、その長手方向両端縁に隣接し、前記ヘッダ部(7)の内面に凸条(8)が、第１の溝型プレート(2)と第２の溝型プレート(3)の各板厚の和以上の高さにプレス成形され、その凸条(8)が各偏平チューブ(4)間に形成される前記隙間(13)を埋めるように被嵌され、その凸条(8)と各偏平チューブ(4)とが一体にろう付けされたヘッダプレートレス型の熱交換器。 Each has a first grooved plate (2) and a second grooved plate (3) formed such that the height of the side wall (1) at both ends in the longitudinal direction is higher than the other part , A flat tube having a second groove plate (3) positioned inside the first groove plate (2) and fitted in opposite directions and having bulging portions (14) at both ends thereof. 4) formed,
A core (5) is formed by laminating a plurality of flat tubes (4),
The core (5) has a gap (13) at the corner of the adjacent portion of each flat tube (4) at the position of the bulging portion (14),
In the header plateless type heat exchanger in which the casing (6) is fitted on the outer periphery of the core (5) and the header portion (7) is arranged on the extension of both ends of the core (5),
On the side wall (1) side of the flat tube (4), adjacent to both longitudinal edges thereof, a ridge (8) is formed on the inner surface of the header portion (7) with the first groove plate (2). are pressed into the thickness sum over the height of the second grooved plate (3), so as to fill the gap (13) formed between the ridges (8) are each flat tubes (4) A header plateless type heat exchanger in which the ridges (8) and the flat tubes (4) are brazed together.
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