JP2005207726A

JP2005207726A - Heat exchanger and manufacturing method therefor

Info

Publication number: JP2005207726A
Application number: JP2004362437A
Authority: JP
Inventors: Keiichi Nakada; 圭一中田
Original assignee: Showa Denko KK
Current assignee: Resonac Holdings Corp
Priority date: 2003-12-22
Filing date: 2004-12-15
Publication date: 2005-08-04

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat exchanger allowing a fluid of high pressure to flow inside flat hollow bodies. <P>SOLUTION: This heat exchanger is provided with the plurality of flat hollow bodies 2 arranged in parallel with a vertical-directional space, and extended in the lateral direction, a communication part 3 arranged between fellow left end parts of the vertically adjacent flat hollow bodies 2, and a spacer 4 arranged between fellow right end parts of the adjacent flat hollow bodies 2. Each flat hollow body 2 comprises top and bottom walls 11, a peripheral wall 12 astride between the top and bottom walls 11, and a partitioning wall 15 for partitioning an inside into two linear flow passages 13, 14 extended laterally. Through holes 16, 17 are formed to communicate longitudinal both side portions in left end parts of the top and bottom walls 11 with the communication part 3. A right end part of the partitioning wall 15 is cut out to communicate the two linear flow passages 13, 14 with each other. A through hole 36 is formed to be extended longitudinally in the spacer 4. The spacer 4 is arranged in a position corresponding to a cut-out part of the partitioning wall 15 in the each flat hollow body 2. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

この発明は、コンプレッサ、工作機械、油圧機器などの産業機械のオイルクーラ、アフタークーラ、ラジエータ等として使用される熱交換器およびその製造方法に関する。 The present invention relates to a heat exchanger used as an oil cooler, an aftercooler, a radiator, or the like of an industrial machine such as a compressor, a machine tool, or a hydraulic device, and a manufacturing method thereof.

この明細書および特許請求の範囲において、図１の上下、左右をそれぞれ上下、左右といい、隣り合う偏平中空体間を流れかつ偏平中空体内を流れる流体と熱交換する流体の流れ方向の下流側、すなわち図１および図８に矢印Ｘで示す方向を前、これと反対側を後というものとする。なお、上下、左右および前後は、便宜上定義したものであって、上下、左右および前後はそれぞれ入れ替わる場合もある。また、以下の説明において、「アルミニウム」という用語には、純アルミニウムの他にアルミニウム合金を含むものとする。 In this specification and claims, the top, bottom, left and right in FIG. 1 are referred to as top, bottom, left, and right, respectively, and downstream in the flow direction of the fluid that flows between adjacent flat bodies and exchanges heat with the fluid that flows through the flat bodies. That is, the direction indicated by the arrow X in FIGS. 1 and 8 is the front, and the opposite side is the rear. Note that the top, bottom, left and right and front and rear are defined for convenience, and the top and bottom, left and right, and front and back may be interchanged. In the following description, the term “aluminum” includes aluminum alloys in addition to pure aluminum.

産業機械のオイルクーラ、アフタークーラ、ラジエータ等として使用される熱交換器として、従来、上下方向に間隔をおいて並列状に配されるとともに左右方向に伸びる高温流体流通用アルミニウム製偏平中空体と、上下に隣り合う偏平中空体の左右両端部間に配されて偏平中空体にろう付されかつ隣り合う偏平中空体の内部どうしをを通じさせるアルミニウム製連通部材と、隣り合う偏平中空体間において左右の連通部材間に配されかつ偏平中空体にろう付されたアルミニウム製コルゲートフィンとを備えており、偏平中空体が、平らな上下壁と、上下壁の周縁間に跨る周壁とを有し、偏平中空体の上下壁の左右両端部にそれぞれ１つの貫通穴が形成され、左右の連通部材にそれぞれ偏平中空体の上下壁の貫通穴に通じる１つの貫通穴が形成され、偏平中空体の左右両端部と左右の連通部材によって上下方向に伸びる左右１対のヘッダ部が形成されたものが知られている（たとえば、特許文献１および特許文献２参照）。 As a heat exchanger used as an oil cooler, aftercooler, radiator, etc. of an industrial machine, conventionally, an aluminum flat hollow body for high-temperature fluid circulation that is arranged in parallel in the vertical direction and extends in the horizontal direction An aluminum communication member disposed between the left and right ends of the flat hollow bodies adjacent to each other and brazed to the flat hollow bodies and passing through the insides of the adjacent flat hollow bodies, and between the adjacent flat hollow bodies An aluminum corrugated fin disposed between the communicating members and brazed to the flat hollow body, the flat hollow body has flat upper and lower walls and a peripheral wall straddling between the peripheral edges of the upper and lower walls, One through hole is formed in each of the left and right ends of the upper and lower walls of the flat hollow body, and one through hole is formed in each of the left and right communication members. Is, there is known a header portion of the left and right pair extending in the vertical direction by the communication member and the left and right left and right end portions of the flat hollow body is formed (e.g., see Patent Documents 1 and 2).

ここで、偏平中空体は、上下方向に間隔をおいて配されかつ両面にろう材層を有するアルミニウムブレージングシートからなる平板と、両平板間に配されかつ両平板にろう付されたアルミニウム製流路形成体とよりなり、平板の左右両端部に貫通穴が形成され、流路形成体が、両平板の周縁部間に跨る周壁、および周壁における両平板の前後両側縁に位置する２つの直線状部分の長さ方向の中間部どうしを連結するように設けられた伝熱面積拡大部とよりなる。 Here, the flat hollow body is composed of a flat plate made of an aluminum brazing sheet that is spaced apart in the vertical direction and has a brazing filler metal layer on both sides, and an aluminum flow that is disposed between the flat plates and brazed to both flat plates. The path forming body is formed with through holes in the left and right ends of the flat plate, and the flow path forming body extends between the peripheral edges of the two flat plates, and the two straight lines located at the front and rear side edges of the two flat plates in the peripheral wall. It consists of a heat-transfer area expansion part provided so that the intermediate part of the length direction of a shape part may be connected.

しかしながら、従来の熱交換器においては、次のような問題がある。すなわち、隣り合う偏平中空体の左右両端部にそれぞれ連通部材が配されているので、全体の重量が比較的大きくなる。すなわち、連通部材には圧力が高い高温流体が通る貫通穴を形成する必要があるので、貫通穴の周囲の部分の肉厚を大きくしなければならず、その結果各連通部材の重量が大きくなって熱交換器全体の重量も大きくなる。また、左右両側にヘッダ部が形成されているので、熱交換器を設置する上で要求される全体の大きさに対して高温流体と低温流体との熱交換部、いわゆるコア部の面積が比較的小さくなり、熱交換性能向上効果に限界がある。さらに、高温流体は、一方のヘッダ部に流入した後、偏平中空体内を流れて他方のヘッダ部に流入し、その間に隣り合う偏平中空体間を後方から前方に向かって流れる低温流体と熱交換するようになっている。この場合、偏平中空体内の後側部分を流れる高温流体は低温流体により効率良く冷却されるが、偏平中空体間の前側部分に至った低温流体の温度は既に比較的高くなっているので、偏平中空体内の前側部分を流れる高温流体の冷却効率は低下する。したがって、全体としての熱交換性能が十分ではない。 However, the conventional heat exchanger has the following problems. That is, since the communicating members are disposed at the left and right ends of the adjacent flat hollow bodies, the overall weight becomes relatively large. That is, since it is necessary to form a through hole through which the high-temperature fluid having a high pressure passes in the communication member, the thickness of the portion around the through hole must be increased, resulting in an increase in the weight of each communication member. As a result, the overall weight of the heat exchanger also increases. In addition, since the header parts are formed on both the left and right sides, the area of the heat exchange part between the high-temperature fluid and the low-temperature fluid, the so-called core area, is compared with the overall size required for installing the heat exchanger. There is a limit to the effect of improving the heat exchange performance. Furthermore, after the high temperature fluid flows into one header portion, it flows through the flat hollow body and into the other header portion, and exchanges heat with the low temperature fluid flowing between the adjacent flat hollow bodies from the rear to the front. It is supposed to do. In this case, the high-temperature fluid flowing in the rear part of the flat hollow body is efficiently cooled by the low-temperature fluid, but the temperature of the low-temperature fluid reaching the front part between the flat hollow bodies is already relatively high. The cooling efficiency of the high-temperature fluid flowing through the front part in the hollow body is reduced. Therefore, the heat exchange performance as a whole is not sufficient.

そこで、このような問題を解決した熱交換器として、本出願人は、先に、上下方向に間隔をおいて並列状に配置されるとともに左右方向に伸びる複数の偏平中空体と、上下に隣り合う偏平中空体の左端部どうしの間に配置されかつ隣り合う偏平中空体の内部どうしを通じさせる連通部材と、隣り合う偏平中空体の右端部どうしの間に配置されたスペーサバーとを備えており、偏平中空体が、左右方向に長い平らな上下壁と、上下壁の周縁間に跨る周壁と、内部を左右方向に伸びる２つの直線状流路に区切る仕切壁とよりなり、上下壁の左端部における仕切壁の前後両側部分に、それぞれ両直線状流路を連通部材に通じさせる２つの貫通穴が前後方向に間隔をおいて形成され、仕切壁の右端部が切除されて２つの直線状流路が相互に連通させられ、スペーサバーの左右方向の幅が、偏平中空体の仕切壁左端部における切除部の左右方向の長さに比較してかなり小さくなっている熱交換器を提案した（特願２００３−３３０５７号参照）。この熱交換器において、偏平中空体は、上下方向に間隔をおいて配された左右方向に長い上下両平板と、両平板間に配されかつ両平板にろう付された流路形成体とよりなり、流路形成体が、上下両平板の前後両側縁部間にそれぞれ配されかつ左右方向に伸びる２つの直線状サイドバーと、両サイドバー間にこれらと間隔をおいて配されかつ左右方向に伸びる１つの中間バーと、両サイドバーおよび中間バーに跨って高さの中間部に一体に設けられた２つの伝熱面積拡大部と、両サイドバーの左端にそれぞれ一体に設けられて前後方向内方に伸び、かつ先端が中間バーの左端部の前後両側面に当接させられてろう付されたエンドバーとよりなり、中間バーの右端部が切除され、両伝熱面積拡大部の左端部がそれぞれ切除され、上下両平板の左端部における中間バーの前後両側部分にそれぞれ貫通穴が形成されており、上下両平板により上下壁が形成され、上下両平板の右端部をそれぞれ互いに他の平板側に曲げるとともにこれらの屈曲部を相互に重ね合わせてろう付することにより周壁の右壁部が形成され、流路形成体の両サイドバーにより周壁の前後両側壁部が形成され、流路形成体のエンドバーにより周壁の左壁部が形成され、流路形成体の中間バーにより仕切壁が形成されている。 Therefore, as a heat exchanger that solves such a problem, the present applicant has firstly arranged a plurality of flat hollow bodies that are arranged in parallel at intervals in the vertical direction and that extend in the horizontal direction and are adjacent to each other in the vertical direction. A communication member disposed between the left end portions of the matching flat hollow bodies and passing through the insides of the adjacent flat hollow bodies, and a spacer bar disposed between the right end portions of the adjacent flat hollow bodies. The flat hollow body is composed of a flat upper and lower wall that is long in the left-right direction, a peripheral wall straddling between the peripheral edges of the upper and lower walls, and a partition wall that divides the interior into two linear flow paths that extend in the left-right direction. Two through holes are formed in the front and rear sides of the partition wall at the front and rear, respectively, so that both linear flow paths are connected to the communication member at intervals in the front-rear direction, and the right end of the partition wall is cut off to form two linear shapes. If the flow paths communicate with each other The heat exchanger in which the width of the spacer bar in the left-right direction is considerably smaller than the length in the left-right direction of the cut-out portion at the left end of the partition wall of the flat hollow body has been proposed (see Japanese Patent Application No. 2003-33057). ). In this heat exchanger, the flat hollow body includes an upper and lower flat plates that are long in the left-right direction and spaced apart in the vertical direction, and a flow path forming body that is disposed between the flat plates and brazed to both flat plates. The flow path forming body is arranged between the front and rear side edges of the upper and lower flat plates and extends in the left-right direction, and is arranged between the side bars with a space therebetween and in the left-right direction. One intermediate bar that extends in the middle, two heat transfer area expansion parts that are integrally provided in the middle part of the height across both side bars and the intermediate bar, and the front and rear parts that are integrally provided at the left end of both side bars It consists of an end bar that extends inward in direction and is brazed with the front end being brought into contact with the front and rear side surfaces of the left end of the intermediate bar. The right end of the intermediate bar is cut off, and the left end of both heat transfer area expansion parts The left and right edges of the upper and lower flat plates Through holes are formed in both front and rear side portions of the intermediate bar, and upper and lower flat plates form upper and lower walls. The right end portions of the upper and lower flat plates are bent toward each other and the bent portions are mutually connected. The right wall of the peripheral wall is formed by overlapping and brazing, both the side walls of the peripheral wall are formed by both side bars of the flow path forming body, and the left wall of the peripheral wall is formed by the end bar of the flow path forming body The partition wall is formed by the intermediate bar of the flow path forming body.

しかしながら、その後本発明者が種々検討を重ねた結果、先に提案した熱交換器においては、次のような問題が生じるおそれがあることが判明した。すなわち、流路形成体の中間バーが切除された部分においては、上下両平板はサイドバーにろう付されているだけであるから、この部分の平板の強度が低下する。そのため、偏平中空体内を流れる流体の圧力が低い場合には問題がないが、流体の圧力が高い場合に膨れなどが発生するおそれがある。
特開２００１−８２８９１号公報特開平８−２３３４７６号公報 However, as a result of various studies by the inventor thereafter, it has been found that the following problems may occur in the previously proposed heat exchanger. That is, since the upper and lower flat plates are only brazed to the side bars in the portion where the intermediate bar of the flow path forming body is cut, the strength of the flat plate in this portion is reduced. For this reason, there is no problem when the pressure of the fluid flowing through the flat hollow body is low, but there is a possibility that swelling may occur when the pressure of the fluid is high.
JP 2001-82891 A JP-A-8-233476

この発明の目的は、上記問題を解決し、高圧の流体を偏平中空体内に流すことができる熱交換器およびその製造方法を提供することにある。 An object of the present invention is to solve the above-described problems and provide a heat exchanger capable of flowing a high-pressure fluid into a flat hollow body and a method for manufacturing the same.

本発明は、上記目的を達成するために以下の態様からなる。 In order to achieve the above object, the present invention comprises the following aspects.

1)上下方向に間隔をおいて並列状に配置されるとともに左右方向に伸びる複数の偏平中空体と、上下に隣り合う偏平中空体の左端部どうしの間に配置されかつ隣り合う偏平中空体の内部どうしを通じさせる連通部材と、隣り合う偏平中空体の右端部どうしの間に配置されたブロック状のスペーサとを備えており、偏平中空体が、左右方向に長い平らな上下壁と、上下壁の周縁間に跨る周壁と、内部を左右方向に伸びる２つの直線状流路に区切る仕切壁とよりなり、上下壁の左端部における仕切壁の前後両側部分に、それぞれ両直線状流路を連通部材に通じさせる２つの貫通穴が前後方向に間隔をおいて形成され、仕切壁の右端部が切除されて２つの直線状流路が相互に連通させられ、スペーサに前後方向に伸びる貫通穴が形成され、スペーサが、偏平中空体における仕切壁の切除部に対応する位置に配置されている熱交換器。 1) A plurality of flat hollow bodies arranged in parallel in the vertical direction and extending in the left-right direction, and adjacent flat hollow bodies arranged between the left ends of the flat hollow bodies adjacent in the vertical direction It has a communicating member that allows the interior to pass through, and a block-like spacer disposed between the right ends of the adjacent flat hollow bodies. The flat hollow body has a flat upper and lower wall that is long in the left-right direction, and an upper and lower wall. And a partition wall that divides the interior into two linear channels that extend in the left-right direction. Both linear channels communicate with the front and rear sides of the partition wall at the left end of the upper and lower walls. Two through-holes communicating with the member are formed at intervals in the front-rear direction, the right end portion of the partition wall is cut off, the two linear flow paths are communicated with each other, and a through-hole extending in the front-rear direction is formed in the spacer. Formed and spacer , A heat exchanger is disposed at a position corresponding to the cutout of the partition wall in the flat hollow bodies.

2)スペーサの左右方向の幅が、偏平中空体の仕切壁における切除部の左右方向の長さよりも大きくなっている上記1)記載の熱交換器。 2) The heat exchanger according to the above 1), wherein the width of the spacer in the left-right direction is larger than the length in the left-right direction of the cut portion in the partition wall of the flat hollow body.

3)スペーサに、前後方向に伸びる複数の貫通穴が、左右方向に並んで形成されている上記1)または2)記載の熱交換器。 3) The heat exchanger according to 1) or 2) above, wherein a plurality of through-holes extending in the front-rear direction are formed in the spacer side by side in the left-right direction.

4)スペーサの貫通穴の内周面に、貫通穴の長さ方向に伸びる複数の凸部および／または凹部が形成されている上記1)〜3)のうちのいずれかに記載の熱交換器。 4) The heat exchanger according to any one of 1) to 3) above, wherein a plurality of convex portions and / or concave portions extending in the length direction of the through hole are formed on the inner peripheral surface of the through hole of the spacer. .

5)偏平中空体が、上下方向に間隔をおいて配された左右方向に長い上下両平板と、両平板間に配されかつ両平板にろう付された流路形成体とよりなり、流路形成体が、上下両平板の前後両側縁部間にそれぞれ配されかつ左右方向に伸びる２つの直線状サイドバーと、両サイドバー間にこれらと間隔をおいて配されかつ左右方向に伸びる１つの中間バーと、両サイドバーおよび中間バーに跨って高さの中間部に一体に設けられた２つの伝熱面積拡大部と、両サイドバーの左端にそれぞれ一体に設けられて前後方向内方に伸び、かつ先端が中間バーの左端部の前後両側面に当接させられてろう付されたエンドバーとよりなり、中間バーの右端部が切除され、両伝熱面積拡大部の左端部がそれぞれ切除され、上下両平板の左端部における中間バーの前後両側部分にそれぞれ貫通穴が形成されており、上下両平板により上下壁が形成され、上下両平板の右端部をそれぞれ互いに他の平板側に曲げるとともにこれらの屈曲部を相互に重ね合わせてろう付することにより周壁の右壁部が形成され、流路形成体の両サイドバーにより周壁の前後両側壁部が形成され、流路形成体のエンドバーにより周壁の左壁部が形成されている上記1)〜4)のうちのいずれかに記載の熱交換器。 5) The flat hollow body is composed of upper and lower flat plates that are long in the left-right direction and spaced apart in the vertical direction, and a flow path forming body that is disposed between the flat plates and brazed to the both flat plates. The formed body is disposed between the front and rear side edges of the upper and lower flat plates and extends in the left-right direction, and the formed body is disposed between the side bars at a distance from each other and extends in the left-right direction. An intermediate bar, two sidebars, two heat transfer area expansion parts that are integrally provided at the intermediate part of the height across the intermediate bar, and the left end of both sidebars are provided integrally with each other in the front-rear direction It is composed of an end bar that is extended and brazed by contacting the front and rear sides of the left end of the intermediate bar. The right end of the intermediate bar is cut off, and the left end of both heat transfer area expansion parts are cut off. Of the middle bar at the left end of both upper and lower flat plates Through holes are formed on both sides of the rear, upper and lower plates form upper and lower walls, and the right ends of the upper and lower plates are bent toward each other and the bent portions are overlapped with each other. The right wall part of the peripheral wall is formed by attaching, both the front and rear side wall parts of the peripheral wall are formed by both side bars of the flow path forming body, and the left wall part of the peripheral wall is formed by the end bar of the flow path forming body The heat exchanger according to any one of 1) to 4).

6)上下両平板がそれぞれアルミニウムブレージングシートからなり、流路形成体がアルミニウム押出形材よりなる上記5)記載の熱交換器。 6) The heat exchanger as described in 5) above, wherein the upper and lower flat plates are each made of an aluminum brazing sheet, and the flow path forming body is made of an aluminum extruded profile.

7)上記1)〜6)のうちのいずれかに記載の熱交換器をオイルクーラとして備えている産業機械。 7) An industrial machine provided with the heat exchanger according to any one of 1) to 6) as an oil cooler.

8)上記1)〜6)のうちのいずれかに記載の熱交換器をアフタークーラとして備えている産業機械。 8) An industrial machine provided with the heat exchanger according to any one of 1) to 6) as an aftercooler.

9)上記1)記載の熱交換器を製造する方法であって、前後方向に間隔をおいて設けられかつ左右方向に伸びる２つの直線状サイドバーと、両サイドバー間にこれらと間隔をおいて設けられかつ左右方向に伸びる中間バーと、両サイドバーおよび中間バーに跨って高さの中間部に一体に設けられた平板状部とよりなる流路形成体用素材、左右方向に長い上下２枚の平板、前後方向に間隔をおいて上下方向に伸びる２つの貫通穴が形成された連通部材、ならびに前後方向に伸びる貫通穴が形成されたスペーサを用意し、流路形成体用素材の中間バーの左右両端部を切除するとともに両平板状部の左端部を中間バーの左端部の切除長さよりも長くなるように切除すること、流路形成体用素材の両平板状部にそれぞれプレス加工を施すことにより伝熱面積拡大部を形成すること、および流路形成体用素材の両サイドバーの左端部をそれぞれ前後方向内方に曲げてその先端を中間バーの左端部の前後両側面に当接させてエンドバーを形成することにより流路形成体をつくり、両平板の右端部をそれぞれ互いに反対側の平板側に曲げて屈曲部を形成するとともに、両平板の左端部における中間バーの前後両側に位置する部分にそれぞれ貫通穴を形成し、上下両平板間に流路形成体を介在させてなる複数の組み合わせ体を上下に間隔をおいて並列状に配し、上下に隣り合う組み合わせ体の左端部間に、２つの貫通穴が平板の２つの貫通穴と通じるように連通部材を配するとともに、同右端部間にスペーサを配し、さらに上下に隣り合う組み合わせ体間における連通部材とスペーサとの間にフィンを配し、上下両平板と流路形成体の両サイドバー、中間バーおよびエンドバー、両エンドバーの先端部と中間バー、ならびに平板の屈曲部どうしをそれぞれろう付し、さらに平板と連通部材、スペーサおよびフィンとをろう付することを特徴とする熱交換器の製造方法。 9) A method of manufacturing a heat exchanger as described in 1) above, wherein two linear sidebars provided at intervals in the front-rear direction and extending in the left-right direction are spaced between the two sidebars. The material for the flow path forming body is composed of an intermediate bar that is provided and extends in the left-right direction, and a flat plate-like part that is integrally provided at the intermediate portion of the height across both side bars and the intermediate bar. Two flat plates, a communication member formed with two through holes extending in the up-down direction at intervals in the front-rear direction, and a spacer formed with a through hole extending in the front-rear direction are prepared. Cut both left and right ends of the intermediate bar and cut the left end of both plate-like parts to be longer than the cut length of the left end of the intermediate bar. Heat transfer area by processing Forming an enlarged part, and bending the left end of both side bars of the material for the flow path forming body inward in the front-rear direction, with their tips abutting against the front and rear side surfaces of the left end of the intermediate bar, forming an end bar By forming the flow path forming body, the right end portions of both flat plates are bent to the opposite flat plate side to form a bent portion, and the left end portions of both flat plates are located on the front and rear sides of the intermediate bar, respectively. A plurality of combinations formed by forming a through hole and interposing a flow path forming body between the upper and lower flat plates are arranged in parallel at intervals in the vertical direction, and between the left end portions of the upper and lower adjacent combinations, 2 The communication member is arranged so that one through hole communicates with the two through holes of the flat plate, a spacer is arranged between the right end portions, and a fin is provided between the communication member and the spacer between the upper and lower adjacent combinations. Arrangement The upper and lower flat plates and the side bars of the flow path forming body, the intermediate bar and end bar, the tip and intermediate bars of both end bars, and the bent portions of the flat plate are brazed to each other. A method for producing a heat exchanger, characterized by brazing.

10)平板をアルミニウムブレージングシートで形成し、連通部材、スペーサおよび流路形成体用素材をアルミニウム押出形材で形成し、フィンをアルミニウム薄板で形成し、上記ろう付を平板から溶け出したろう材により行う上記9)記載の熱交換器の製造方法。 10) A flat plate is formed of an aluminum brazing sheet, a communicating member, a spacer and a material for a flow path forming body are formed of an aluminum extruded shape, a fin is formed of an aluminum thin plate, and the brazing is melted from the flat plate. The manufacturing method of the heat exchanger as described in 9) above.

11)スペーサの左右方向の幅を、流路形成体用素材の中間バーにおける右端部側の切除部の左右方向の長さよりも大きくしておく上記9)または10)記載の熱交換器の製造方法。 11) Production of the heat exchanger according to the above 9) or 10), wherein the width in the left-right direction of the spacer is set to be larger than the length in the left-right direction of the cut-out part on the right end side of the intermediate bar of the material for the flow path forming body. Method.

12)スペーサに、前後方向に伸びる複数の貫通穴を形成しておく上記9)〜11)のうちのいずれかに記載の熱交換器の製造方法。 12) The method for producing a heat exchanger according to any one of 9) to 11) above, wherein a plurality of through holes extending in the front-rear direction are formed in the spacer.

13)スペーサの貫通穴の内周面に、貫通穴の長さ方向に伸びる複数の凸部および／または凹部を形成しておく上記9)〜12)のうちのいずれかに記載の熱交換器の製造方法。 13) The heat exchanger according to any one of 9) to 12) above, wherein a plurality of convex portions and / or concave portions extending in the length direction of the through hole are formed on the inner peripheral surface of the through hole of the spacer. Manufacturing method.

上記1)の熱交換器によれば、スペーサが、偏平中空体の仕切壁の切除部に対応する位置に配置されているので、偏平中空体の上下壁に跨る仕切壁が存在しない部分においても、上下壁の強度の低下が防止され、その結果、偏平中空体内に高圧の流体を流した場合にも上下壁に膨れなどが発生することが防止される。したがって、高圧の流体を偏平中空体内に流すことができる。しかも、スペーサの重量を、貫通穴がないスペーサを用いる場合に比べて小さくすることができ、熱交換器全体の重量増加を防止することができる。また、熱交換部の偏平中空体内を流れる高温の流体を冷却する流体、たとえば冷却風がスペーサの貫通穴内を流れるので、スペーサの部分も熱交換に寄与し、貫通穴がないスペーサを用いる場合に比べて、偏平中空体内を流れる高温流体の冷却効率が向上する。 According to the heat exchanger of 1) above, since the spacer is disposed at a position corresponding to the cut portion of the partition wall of the flat hollow body, even in a portion where there is no partition wall straddling the upper and lower walls of the flat hollow body As a result, the strength of the upper and lower walls is prevented from being lowered. As a result, even when a high-pressure fluid flows through the flat hollow body, the upper and lower walls are prevented from being swollen. Therefore, a high-pressure fluid can be flowed into the flat hollow body. In addition, the weight of the spacer can be reduced as compared with the case where a spacer without a through hole is used, and an increase in the weight of the entire heat exchanger can be prevented. In addition, when a fluid that cools the high-temperature fluid flowing in the flat hollow body of the heat exchange section, for example, cooling air, flows in the through holes of the spacer, the spacer portion also contributes to the heat exchange and the spacer without the through hole is used. In comparison, the cooling efficiency of the high-temperature fluid flowing through the flat hollow body is improved.

上記2)の熱交換器によれば、スペーサの左右方向の幅が、偏平中空体の仕切壁における切除部の左右方向の長さよりも大きくなっているので、偏平中空体の上下壁に跨る仕切壁が存在しない部分における上下壁の強度の低下を確実に防止することが可能になり、その結果、偏平中空体内に高圧の流体を流した場合にも上下壁に膨れなどが発生することを確実に防止することができる。したがって、高圧の流体を偏平中空体内に流すことができる。 According to the heat exchanger of 2) above, since the width in the left-right direction of the spacer is larger than the length in the left-right direction of the cut portion in the partition wall of the flat hollow body, the partition straddling the upper and lower walls of the flat hollow body It is possible to reliably prevent lowering of the strength of the upper and lower walls where there is no wall, and as a result, even if a high-pressure fluid flows through the flat hollow body, it is ensured that the upper and lower walls will bulge. Can be prevented. Therefore, a high-pressure fluid can be flowed into the flat hollow body.

上記3)の熱交換器によれば、隣り合う貫通穴間の部分が、偏平中空体の上下壁を補強することになるので、上下壁の強度の低下が一層確実に防止される。 According to the heat exchanger of 3) above, the portion between the adjacent through holes reinforces the upper and lower walls of the flat hollow body, so that the lowering of the strength of the upper and lower walls can be prevented more reliably.

上記4)の熱交換器によれば、スペーサの貫通穴の内周面に、貫通穴の長さ方向に伸びる複数の凸部および／または凹部が形成されているので、偏平中空体内を流れる高温流体と、貫通穴内を流れる低温流体との伝熱面積が増大し、上記1)で述べた高温流体の冷却効率が一層向上する。 According to the heat exchanger of 4) above, since the plurality of convex portions and / or concave portions extending in the length direction of the through hole are formed on the inner peripheral surface of the through hole of the spacer, the high temperature flowing through the flat hollow body The heat transfer area between the fluid and the low-temperature fluid flowing in the through hole is increased, and the cooling efficiency of the high-temperature fluid described in 1) is further improved.

上記5)の熱交換器によれば、スペーサが、偏平中空体の仕切壁を構成する流路形成体の中間バーの切除部に対応する位置に配置されることになるので、偏平中空体の上下両平板にろう付された中間バーが存在しない部分においても、上下両平板の強度の低下が防止され、その結果、偏平中空体内に高圧の流体を流した場合にも上下両平板に膨れなどが発生することが防止される。したがって、高圧の流体を偏平中空体内に流すことができる。また、流路形成体のエンドバーの先端部が中間バーにろう付されているので、偏平中空体の強度が増大する。すなわち、流路形成体の中間バーの左端部は、スペーサにおける２つの貫通穴の間の部分において上下両平板にろう付されることになり、エンドバーの先端部がこの中間バーにろう付されているので、偏平中空体内を流れる流体により、エンドバーに左方への力が加わったとしても、エンドバーの破損が防止される。 According to the heat exchanger of the above 5), the spacer is disposed at a position corresponding to the cut portion of the intermediate bar of the flow path forming body constituting the partition wall of the flat hollow body. Even in the part where there is no intermediate bar brazed to both the upper and lower flat plates, the strength of the upper and lower flat plates is prevented from being reduced. As a result, even when a high-pressure fluid flows through the flat hollow body, the upper and lower flat plates swell. Is prevented from occurring. Therefore, a high-pressure fluid can be flowed into the flat hollow body. Further, since the end portion of the end bar of the flow path forming body is brazed to the intermediate bar, the strength of the flat hollow body increases. That is, the left end portion of the intermediate bar of the flow path forming body is brazed to the upper and lower flat plates at the portion between the two through holes in the spacer, and the end portion of the end bar is brazed to the intermediate bar. Therefore, even if a leftward force is applied to the end bar by the fluid flowing through the flat hollow body, the end bar is prevented from being damaged.

上記6)の熱交換器によれば、全体の重量が小さくなるとともに、その製造が容易になる。 According to the heat exchanger of 6), the overall weight is reduced and the manufacture thereof is facilitated.

上記9)の熱交換器の製造方法によれば、上記1)の効果を奏する熱交換器を簡単に製造することができる。 According to the method for producing a heat exchanger of 9), a heat exchanger having the effect of 1) can be easily produced.

上記10)の熱交換器の製造方法によれば、熱交換器の製造が一層容易になるとともに、製造された熱交換器の重量が一層小さくなる。 According to the method for producing a heat exchanger according to 10), the production of the heat exchanger is further facilitated, and the weight of the produced heat exchanger is further reduced.

上記11)の熱交換器の製造方法によれば、上記2)の効果を奏する熱交換器を簡単に製造することができる。 According to the heat exchanger manufacturing method of 11) above, a heat exchanger having the effect of 2) can be easily manufactured.

上記12)の熱交換器の製造方法によれば、上記3)の効果を奏する熱交換器を簡単に製造することができる。 According to the method for producing a heat exchanger of 12), a heat exchanger having the effect of 3) can be easily produced.

上記13)のの熱交換器の製造方法によれば、上記4)の効果を奏する熱交換器を簡単に製造することができる。 According to the heat exchanger manufacturing method of the above 13), a heat exchanger having the effect of the above 4) can be easily manufactured.

以下、この発明の実施形態を、図面を参照して説明する。 Embodiments of the present invention will be described below with reference to the drawings.

図１はこの発明による熱交換器の全体構成を示し、図２〜図４および図７はその要部の構成を示す。また、図５および図６は偏平中空体の流路形成体の製造方法を示し、図８は図１に示す熱交換器における高温流体の流れを示す。なお、全図面を通じて同一部材および同一部分には同一符号を付す。 FIG. 1 shows the overall configuration of a heat exchanger according to the present invention, and FIGS. 2 to 4 and 7 show the configuration of the main part thereof. 5 and 6 show a method of manufacturing a flat hollow body flow path forming body, and FIG. 8 shows a flow of a high-temperature fluid in the heat exchanger shown in FIG. In addition, the same code | symbol is attached | subjected to the same member and the same part through all the drawings.

なお、この実施形態は、この発明による熱交換器をコンプレッサのオイルクーラに適用したものである。ここで、コンプレッサとしては、たとえばロードコンプレッサ、ガスタービンに用いられるコンプレッサ、鉄道車両用ブレーキに用いられるコンプレッサなどが挙げられる。 In this embodiment, the heat exchanger according to the present invention is applied to an oil cooler of a compressor. Here, examples of the compressor include a road compressor, a compressor used for a gas turbine, and a compressor used for a railway vehicle brake.

図１において、オイルクーラ(1)は、上下方向に間隔をおいて並列状に配されかつ左右方向に伸びるアルミニウム製の高温オイル流通用偏平中空体(2)と、上下に隣り合う偏平中空体(2)の左端部間に配されて偏平中空体(2)にろう付されかつ隣り合う偏平中空体(2)の内部どうしを通じさせるアルミニウム押出形材製連通部材(3)と、上下に隣り合う偏平中空体(2)の右端部間に配されて偏平中空体(2)にろう付されたアルミニウム押出形材製スペーサ(4)と、連通部材(3)およびスペーサ(4)間において隣り合う偏平中空体(2)間の通風間隙(5)に配されかつ偏平中空体(2)にろう付されたアルミニウム製コルゲートフィン(6)とを備えている。 In FIG. 1, the oil cooler (1) includes a flat hollow body (2) for high-temperature oil circulation made of aluminum and arranged in parallel in the vertical direction and extending in the left-right direction, and a flat hollow body adjacent to the top and bottom. An aluminum extruded shape communicating member (3) arranged vertically between the left end of (2) and brazed to the flat hollow body (2) and passing through the inside of the adjacent flat hollow body (2). An aluminum extruded profile spacer (4) disposed between the right ends of the matching flat hollow body (2) and brazed to the flat hollow body (2), and adjacent between the communicating member (3) and the spacer (4) An aluminum corrugated fin (6) disposed in the ventilation gap (5) between the matching flat hollow bodies (2) and brazed to the flat hollow bodies (2) is provided.

オイルクーラ(1)の下端の偏平中空体(2)の左端部下側に、連通部材(3)と同じ厚みおよび大きさであるアルミニウム押出形材製入出部材(7)が配されて偏平中空体(2)にろう付され、同じく右端部下側に、偏平中空体(2)間のスペーサ(4)と同じスペーサ(4)が配されて偏平中空体(2)にろう付されている。また、左右方向に長いアルミニウム製下サイドプレート(8)の左端部が入出部材(7)の下面右端部に、同じく右端部がスペーサ(4)の下面全体にそれぞれろう付されており、この下サイドプレート(8)と下端の偏平中空体(2)との間も通風間隙(5)となされるとともに、この通風間隙(5)にもコルゲートフィン(6)が配されて下サイドプレート(8)および偏平中空体(2)にろう付されている。下サイドプレート(8)は、上面にろう材層を有するアルミニウムブレージングシートからなる。 An aluminum extruded profile input / output member (7) having the same thickness and size as the communicating member (3) is disposed below the left end of the flat hollow body (2) at the lower end of the oil cooler (1), thereby providing a flat hollow body. The same spacer (4) as the spacer (4) between the flat hollow bodies (2) is also brazed to (2) and brazed to the flat hollow body (2). The left end of the lower aluminum side plate (8) that is long in the left-right direction is brazed to the right end of the lower surface of the input / output member (7), and the right end is also brazed to the entire lower surface of the spacer (4). A ventilation gap (5) is also formed between the side plate (8) and the flat hollow body (2) at the lower end, and corrugated fins (6) are also arranged in the ventilation gap (5) so that the lower side plate (8 ) And the flat hollow body (2). The lower side plate (8) is made of an aluminum brazing sheet having a brazing filler metal layer on the upper surface.

オイルクーラ(1)の上端の偏平中空体(2)の左端部上側に、偏平中空体(2)間の連通部材(3)と同じ連通部材(3)が配されて偏平中空体(2)にろう付され、同じく右端部上側に、偏平中空体(2)間のスペーサ(4)と同じスペーサ(4)が配されて偏平中空体(2)にろう付されている。また、左右方向に長いアルミニウム製上サイドプレート(9)の左端部が連通部材(3)の上面全体に、同じく右端部がスペーサ(4)の上面全体にそれぞれろう付されており、この上サイドプレート(9)と下端の偏平中空体(2)との間も通風間隙(5)となされるとともに、この通風間隙(5)にもコルゲートフィン(6)が配されて上サイドプレート(9)および偏平中空体(2)にろう付されている。上サイドプレート(9)は、下面にろう材層を有するアルミニウムブレージングシートからなる。 The same communicating member (3) as the communicating member (3) between the flat hollow bodies (2) is arranged on the upper left end of the flat hollow body (2) at the upper end of the oil cooler (1) so that the flat hollow body (2) The same spacer (4) as the spacer (4) between the flat hollow bodies (2) is disposed on the upper side of the right end portion and brazed to the flat hollow body (2). The left upper end of the aluminum upper side plate (9) that is long in the left-right direction is brazed to the entire upper surface of the communication member (3), and the right end is also brazed to the entire upper surface of the spacer (4). A ventilation gap (5) is also formed between the plate (9) and the flat hollow body (2) at the lower end, and corrugated fins (6) are also arranged in the ventilation gap (5) to form the upper side plate (9). And is brazed to the flat hollow body (2). The upper side plate (9) is made of an aluminum brazing sheet having a brazing filler metal layer on the lower surface.

図２および図３に示すように、偏平中空体(2)は、左右方向に長い平らな上下壁(11)と、上下壁(11)の周縁間に跨る周壁(12)と、内部を左右方向に伸びる前後２つの流路(13)(14)に区切る仕切壁(15)とよりなり、上下壁(11)の左端部における仕切壁(15)の前後両側部分に、それぞれ両流路(13)(14)を外部に通じさせる２つの貫通穴(16)(17)が前後方向に間隔をおいて形成されている。また、仕切壁(15)の右端部が切除されて２つの流路(13)(14)が相互に連通させられている。連通部を(18)で示す。このような偏平中空体(2)は、両面にろう材層を有するアルミニウムブレージングシートよりなりかつ上下方向に間隔をおいて配された左右方向に長い２枚の長方形状平板(19)(21)と、上下両平板(19)(21)間に配されかつ両平板(19)(21)にろう付されたアルミニウム押出形材製流路形成体(22)とよりなる。 As shown in FIGS. 2 and 3, the flat hollow body (2) includes a flat upper and lower wall (11) long in the left-right direction, a peripheral wall (12) straddling between the peripheral edges of the upper and lower walls (11), It consists of a partition wall (15) that is divided into two flow paths (13) and (14) that extend in the direction, and both flow paths (on both sides of the partition wall (15) at the left end of the upper and lower walls (11)) 13) Two through-holes (16) and (17) are formed at intervals in the front-rear direction for allowing (14) to communicate with the outside. Further, the right end portion of the partition wall (15) is cut away so that the two flow paths (13) and (14) communicate with each other. The communication part is indicated by (18). Such a flat hollow body (2) is composed of two rectangular flat plates (19) (21) made of an aluminum brazing sheet having a brazing filler metal layer on both sides and long in the horizontal direction and spaced apart in the vertical direction. And an aluminum extruded shape channel forming body (22) disposed between the upper and lower flat plates (19) and (21) and brazed to the both flat plates (19) and (21).

両平板(19)(21)の左端部の前後両側部分に、それぞれ貫通穴(16)(17)が形成されている。また、両平板(19)(21)の右端部は、それぞれ互いに他の平板(21)(19)側、すなわち上側の平板(19)においては下方、下側の平板(21)においては上方に曲げられ、これらの屈曲部(19a)(21a)が相互に重ね合わされてろう付されている（図４参照）。そして、両平板(19)(21)により上下壁(11)が形成され、両平板(19)(21)の屈曲部(19a)(21a)により周壁(12)の右壁部(12a)が形成されている。 Through holes (16) and (17) are formed in both front and rear side portions of the left end portions of both flat plates (19) and (21). Also, the right end portions of both flat plates (19) and (21) are respectively on the other flat plate (21) and (19) side, i.e., downward on the upper flat plate (19) and upward on the lower flat plate (21). The bent portions (19a) and (21a) are brazed so as to overlap each other (see FIG. 4). The upper and lower walls (11) are formed by both flat plates (19) and (21), and the right wall portion (12a) of the peripheral wall (12) is formed by the bent portions (19a) and (21a) of both flat plates (19) and (21). Is formed.

流路形成体(22)は、上下両平板(19)(21)の前後両側縁部間にそれぞれ配されかつ左右方向に伸びる２つの直線状サイドバー(23)と、両サイドバー(23)間にこれらと間隔をおいて配されかつ左右方向に伸びる１つの中間バー(24)と、両サイドバー(23)および中間バー(24)に跨って高さの中間部に一体に設けられた２つの伝熱面積拡大部(25)と、両サイドバー(23)の左端にそれぞれ一体に設けられて前後方向内方に伸び、かつ先端が中間バー(24)の左端部の前後両側面に当接させられてろう付されたエンドバー(26)とよりなる。両サイドバー(23)、中間バー(24)および両エンドバー(26)は上下両平板(19)(21)にろう付されている。中間バー(24)の左端部は、両平板(19)(21)における両貫通穴(16)(17)の間の部分にろう付されている。中間バー(24)の右端部は、連通部(18)を形成するように、所定長さにわたって切除されている。また、両伝熱面積拡大部(25)の左端部は、ここに両平板(19)(21)の貫通穴(16)(17)に合致する貫通穴が形成されるように、所定長さにわたって切除されている。そして、流路形成体(22)の両サイドバー(23)により周壁(12)の前後両側壁部(12b)が形成され、流路形成体(22)の両エンドバー(26)により周壁(12)の左壁部(12c)が形成されている。 The flow path forming body (22) includes two linear side bars (23) disposed between the front and rear side edges of the upper and lower flat plates (19) and (21) and extending in the left and right directions, and both side bars (23). One intermediate bar (24) which is arranged with a space between them and extends in the left-right direction, and is provided integrally in the middle part of the height across both side bars (23) and intermediate bar (24) Two heat transfer area expansion sections (25) and left and right ends of both side bars (23) are integrally formed and extend inward in the front-rear direction, and the front ends are on both front and rear sides of the left end of the intermediate bar (24). And an end bar (26) which is brought into contact with and brazed. Both side bars (23), intermediate bar (24) and both end bars (26) are brazed to upper and lower flat plates (19) and (21). The left end portion of the intermediate bar (24) is brazed to a portion between the through holes (16) and (17) in the flat plates (19) and (21). The right end portion of the intermediate bar (24) is cut out over a predetermined length so as to form a communication portion (18). Further, the left end portion of both heat transfer area enlarged portions (25) has a predetermined length so that a through hole matching the through holes (16) and (17) of both flat plates (19) and (21) is formed here. Has been resected. The both side bars (23) of the flow path forming body (22) form both front and rear side wall portions (12b) of the peripheral wall (12), and the end walls (12) of both end bars (26) of the flow path forming body (22) ) Left wall portion (12c) is formed.

図２および図４に示すように、伝熱面積拡大部(25)は、上方突出屈曲部(27a)と下方突出屈曲部(27b)とが、水平部(27c)を介して左右方向に交互に設けられてなる波状帯板部(27)が、前後方向に複数並べられかつ水平部(27c)において相互に一体に連結されることにより形成されたものである。また、伝熱面積拡大部(25)において、前後方向に隣接する波状帯板部(27)の上方突出屈曲部(27a)どうしおよび下方突出屈曲部(27b)どうしはそれぞれ左右方向にずれて形成されている。なお、伝熱面積拡大部(25)の各波状帯板部(27)における左右方向に隣接する上方突出屈曲部(27a)と下方突出屈曲部(27b)との間には水平部(27c)が存在し、前後方向に隣接する波状帯板部(27)どうしは水平部(27c)において相互に一体に連結されているが、水平部(27c)は必ずしも必要としない。この場合、隣接する波状帯板部(27)における上方突出屈曲部(27a)から下方突出屈曲部(27b)に切り替わる部分が交差することになるので、この部分において相互に一体に連結される。 As shown in FIGS. 2 and 4, the heat transfer area expanding portion (25) has an upward protruding bent portion (27a) and a downward protruding bent portion (27b) alternately in the left-right direction via the horizontal portion (27c). A plurality of corrugated strips (27) provided in the front and rear direction are arranged in the front-rear direction and are integrally connected to each other in the horizontal part (27c). Further, in the heat transfer area enlarged portion (25), the upper protruding bent portion (27a) and the lower protruding bent portion (27b) of the corrugated strip portion (27) adjacent in the front-rear direction are formed so as to be shifted in the left-right direction. Has been. The horizontal portion (27c) between the upper protruding bent portion (27a) and the lower protruding bent portion (27b) adjacent to each other in the left-right direction in each corrugated strip (27) of the heat transfer area expanding portion (25). The wavy strip portions (27) adjacent in the front-rear direction are integrally connected to each other at the horizontal portion (27c), but the horizontal portion (27c) is not necessarily required. In this case, the portions of the adjacent corrugated strips (27) where the upper projecting bent portion (27a) switches to the lower projecting bent portion (27b) intersect with each other.

流路形成体(22)は、図５および図６に示すようにして製造される。すなわち、前後方向に間隔をおいて設けられかつ左右方向に伸びる２つの直線状サイドバー(23)と、両サイドバー(23)間にこれらと間隔をおいて設けられかつ左右方向に伸びる中間バー(24)と、両サイドバー(23)および中間バー(24)に跨って高さの中間部に一体に設けられた平板状部(28)とよりなるアルミニウム押出形材製流路形成体用素材(29)を製造する（図５(a)および図６(a)参照）。ついで、中間バー(24)の左右両端部を所定長さにわたって切除するとともに、両平板状部(28)の左端部をそれぞれ中間バー(24)の左端部の切除長さよりも長くなるように切除する（図５(b)および図６(b)参照）。ついで、両平板状部(28)にプレス加工を施すことにより伝熱面積拡大部(25)を形成する（図５(c)および図６(c)参照）。その後、両サイドバー(23)の左端部を前後方向内側に曲げて先端を中間バー(24)の左端部の前後両側面に当接させ（図５(d)参照）、その先端を中間バー(24)にろう付することにより両エンドバー(26)が形成される。こうして、流路形成体(22)が製造される。なお、両エンドバー(26)先端の中間バー(24)へのろう付は、後述する一体型熱交換装置(1)の製造の際に、平板(19)(21)から溶け出した溶融ろう材により行われる。 The flow path forming body (22) is manufactured as shown in FIGS. That is, two linear side bars (23) provided in the front-rear direction and extending in the left-right direction, and an intermediate bar provided between the two side bars (23) and in the left-right direction and extending in the left-right direction (24), and a flow path forming body made of an extruded aluminum material comprising a flat plate-like portion (28) integrally provided at a height intermediate portion across both side bars (23) and the intermediate bar (24) The material (29) is manufactured (see FIG. 5 (a) and FIG. 6 (a)). Next, both the left and right ends of the intermediate bar (24) are cut out over a predetermined length, and the left end portions of both flat plate portions (28) are cut out to be longer than the cut lengths of the left end portions of the intermediate bar (24). (See FIG. 5 (b) and FIG. 6 (b)). Next, the heat transfer area enlarged portion (25) is formed by pressing the flat plate portions (28) (see FIGS. 5 (c) and 6 (c)). Then, the left end of both side bars (23) is bent inward in the front-rear direction and the tip is brought into contact with both front and rear side surfaces of the left end of the intermediate bar (24) (see FIG. 5 (d)). Both end bars (26) are formed by brazing to (24). Thus, the flow path forming body (22) is manufactured. Note that the brazing to the intermediate bar (24) at the tip of both end bars (26) is a molten brazing material that has melted from the flat plates (19) (21) during the manufacture of the integrated heat exchange device (1) described later. Is done.

各連通部材(3)には、図２に示すように、偏平中空体(2)の上下壁(11)の２つの貫通穴(16)(17)に通じる前後２つの垂直貫通穴(31)(32)が、平面から見て貫通穴(16)(17)と合致するように形成されている。そして、すべての偏平中空体(2)の左端部の前側部分およびすべての連通部材(3)の前側部分により入口側ヘッダ部(33A)が形成され（図８参照）、入口側ヘッダ部(33A)において、すべての偏平中空体(2)の前側流路(13)の左端部と、すべての連通部材(3)の前側垂直貫通穴(31)とが上下壁(11)の前側貫通穴(16)により通じさせられている。また、すべての偏平中空体(2)の左端部の後側部分およびすべての連通部材(3)の後側部分により出口側ヘッダ部(33B)が形成され（図８参照）、出口側ヘッダ部(33B)において、すべての偏平中空体(2)の後側流路(14)の左端部と、すべての連通部材(3)の後側垂直貫通穴(32)とが上下壁(11)の後側貫通穴(17)により通じさせられている。 As shown in FIG. 2, each communicating member (3) has two front and rear vertical through holes (31) leading to the two through holes (16) and (17) of the upper and lower walls (11) of the flat hollow body (2). (32) is formed so as to coincide with the through holes (16) and (17) when viewed from above. Then, the inlet side header portion (33A) is formed by the front side portion of the left end portion of all the flat hollow bodies (2) and the front side portion of all the communication members (3) (see FIG. 8), and the inlet side header portion (33A ), The left end of the front flow path (13) of all the flat hollow bodies (2) and the front vertical through holes (31) of all the communication members (3) are front through holes (upper and lower walls (11) ( 16). Further, an outlet-side header portion (33B) is formed by the rear portion of the left end portion of all the flat hollow bodies (2) and the rear portion of all the communication members (3) (see FIG. 8), and the outlet-side header portion. In (33B), the left end of the rear flow path (14) of all the flat hollow bodies (2) and the rear vertical through holes (32) of all the communication members (3) are formed on the upper and lower walls (11). It is made to communicate by the rear side through hole (17).

なお、上端の偏平中空体(2)の左端部上側に配置された連通部材(3)の両垂直貫通穴(31)(32)の上端開口は、上サイドプレート(9)により塞がれている。 Note that the upper end opening of both vertical through holes (31) and (32) of the communicating member (3) disposed on the upper left end of the flat hollow body (2) at the upper end is blocked by the upper side plate (9). Yes.

図７に示すように、入出部材(7)における下サイドプレート(8)の左端よりも左側の部分には、下端の偏平中空体(2)の下壁(11)の２つの貫通穴(16)(17)に通じる前後２つの垂直貫通穴(34)(35)が形成されている。これらの垂直貫通穴(34)(35)の内周面にはそれぞれめねじ(34a)(35a)が形成されている。 As shown in FIG. 7, two through-holes (16) of the lower wall (11) of the flat hollow body (2) at the lower end are formed on the left side of the left end of the lower side plate (8) in the input / output member (7). ) (17) and two vertical through holes (34) and (35) leading to the front are formed. Female threads (34a) and (35a) are formed on the inner peripheral surfaces of these vertical through holes (34) and (35), respectively.

図２に示すように、スペーサ(4)の左右方向の幅は、流路形成体(22)の中間バー(24)の切除部、すなわち連通部(18)の左右方向の長さよりも大きくなっている。また、スペーサ(4)には、前後方向に伸びる複数の貫通穴(36)が左右方向に並んで形成されている。 As shown in FIG. 2, the width of the spacer (4) in the left-right direction is larger than the length in the left-right direction of the cut portion of the intermediate bar (24) of the flow path forming body (22), that is, the communication portion (18). ing. The spacer (4) is formed with a plurality of through holes (36) extending in the front-rear direction and arranged in the left-right direction.

オイルクーラ(1)は、アルミニウムブレージングシート製平板(19)(21)間に流路形成体(22)を介在させてなる組み合わせ体を上下に間隔をおいて並列状に配し、上下に隣り合う組み合わせ体の左端部間に、２つの垂直貫通穴(31)(32)が平板(19)(21)の２つの貫通穴(16)(17)と通じるように連通部材(3)を配するとともに同右端部間にスペーサ(4)を配し、上下に隣り合う組み合わせ体間における連通部材(3)とスペーサ(4)との間にコルゲートフィン(6)を配し、下端の組み合わせ体の下側に入出部材(7)、スペーサ(4)、コルゲートフィン(6)および下サイドプレート(8)を配し、さらに上端の組み合わせ体の上側に連通部材(3)、スペーサ(4)、コルゲートフィン(6)および上サイドプレート(9)を配して適当な手段により仮止めし、これらを一括してろう付することにより製造される。このとき、平板(19)(21)から溶け出した溶融ろう材により、前述した流路形成体(22)のエンドバー(26)と中間バー(24)とがろう付される。 The oil cooler (1) is a combination of aluminum brazing sheet flat plates (19) (21) with a flow path forming body (22) interposed in parallel with a vertical spacing, and adjacent to the top and bottom. The communication member (3) is arranged between the left ends of the matching combination so that the two vertical through holes (31) (32) communicate with the two through holes (16) (17) of the flat plates (19) (21). In addition, a spacer (4) is disposed between the right end portions, and a corrugated fin (6) is disposed between the communicating member (3) and the spacer (4) between the upper and lower adjacent combinations, and the lower end combination body. The entry / exit member (7), the spacer (4), the corrugated fin (6) and the lower side plate (8) are arranged on the lower side, and the communication member (3), the spacer (4), The corrugated fin (6) and the upper side plate (9) are placed and temporarily fixed by appropriate means, and these are manufactured by brazing them together. That. At this time, the end bar (26) and the intermediate bar (24) of the flow path forming body (22) are brazed by the molten brazing material melted from the flat plates (19) and (21).

上述したオイルクーラ(1)において、高温のオイルは、図８に矢印Ｙで示すように、入出部材(7)の前側垂直貫通穴(34)から入口側ヘッダ部(33A)内に流入し、ついですべての偏平中空体(2)に分岐してその前側流路(13)内を右方に流れ、さらに連通部(18)を通って後側流路(14)内に入り、後側流路(14)内を左方に流れて出口側ヘッダ部(33B)内に流入し、入出部材(7)の後側垂直貫通穴(35)から流出する。そして、すべての偏平中空体(2)の前側流路(13)および後側流路(14)を流れている間に、通風間隙(5)を前方に（矢印Ｘ参照）流れる低温の冷却風と熱交換して冷却される。このとき、スペーサ(4)の貫通穴(36)内にも冷却風が流れるので、スペーサ(4)の部分においてもオイルの冷却が行われることになり、冷却効率が向上する。 In the oil cooler (1) described above, hot oil flows into the inlet side header portion (33A) from the front vertical through hole (34) of the inlet / outlet member (7), as indicated by an arrow Y in FIG. Next, it branches into all flat hollow bodies (2) and flows to the right in the front side flow path (13), and further enters the rear side flow path (14) through the communication part (18). It flows leftward in the passage (14), flows into the outlet header (33B), and flows out from the rear vertical through hole (35) of the inlet / outlet member (7). Then, while flowing through the front flow path (13) and the rear flow path (14) of all the flat hollow bodies (2), the low-temperature cooling air flowing forward (see arrow X) through the ventilation gap (5) It is cooled by exchanging heat. At this time, since the cooling air also flows through the through hole (36) of the spacer (4), the oil is also cooled in the spacer (4), and the cooling efficiency is improved.

また、偏平中空体(2)内を流れるオイルの圧力が高い場合、偏平中空体(2)の上下壁(11)、すなわち上下両平板(19)(21)における中間バー(24)とろう付されていない部分、すなわち上下両平板(19)(21)の連通部(18)と対応する部分に外方への大きな力が加わるが、スペーサ(4)によりこのような力が受けられるので、上下壁(11)、すなわち上下両平板(19)(21)の外方への膨れの発生が防止される。 Also, when the pressure of oil flowing in the flat hollow body (2) is high, the upper and lower walls (11) of the flat hollow body (2), that is, the intermediate bars (24) on the upper and lower flat plates (19) (21) are brazed. A large outward force is applied to the part that is not made, that is, the part corresponding to the communicating part (18) of the upper and lower flat plates (19) (21), but such a force is received by the spacer (4), Generation of outward swelling of the upper and lower walls (11), that is, the upper and lower flat plates (19) and (21) is prevented.

上記実施形態において、図９に示すように、スペーサ(4)の貫通穴(36)の内周面に前後方向に伸びる複数の凸部(40)を形成しておいてもよい。この場合、スペーサ(4)から冷却風への伝熱面積が増大し、オイルの冷却効率が一層向上する。なお、凸部(40)に代えて、あるいは凸部(40)に加えて、貫通穴(36)の内周面に前後方向に伸びる複数の凹部を形成しておいてもよい。 In the above embodiment, as shown in FIG. 9, a plurality of convex portions (40) extending in the front-rear direction may be formed on the inner peripheral surface of the through hole (36) of the spacer (4). In this case, the heat transfer area from the spacer (4) to the cooling air is increased, and the oil cooling efficiency is further improved. Instead of the convex portion (40) or in addition to the convex portion (40), a plurality of concave portions extending in the front-rear direction may be formed on the inner peripheral surface of the through hole (36).

上記実施形態においては、スペーサ(4)の左右方向の幅は、流路形成体(22)の中間バー(24)の切除部、すなわち連通部(18)の左右方向の長さよりも大きくなっているが、これに限定されるものではなく、スペーサ(4)の左右方向の幅は連通部(18)の左右方向の長さよりも短くてもよい。たとえば、スペーサ(4)の左右方向の幅が、連通部(18)の左右方向の長さに比べて、流路形成体(22)の波状帯板部(27)の上方突出屈曲部(27a)または下方突出屈曲部(27b)の左右方向の幅の分だけ短くても、上下壁(11)、すなわち上下両平板(19)(21)の外方への膨れの発生が防止される。 In the above embodiment, the width in the left-right direction of the spacer (4) is larger than the cut-out portion of the intermediate bar (24) of the flow path forming body (22), that is, the length in the left-right direction of the communication portion (18). However, the present invention is not limited to this, and the width in the left-right direction of the spacer (4) may be shorter than the length in the left-right direction of the communication portion (18). For example, the width of the spacer (4) in the left-right direction is larger than the length of the communication part (18) in the left-right direction, and the upward protruding bent part (27a of the corrugated strip (27) of the flow path forming body (22) ) Or the downward projecting bent portion (27b) by the width in the left-right direction can prevent the upper and lower walls (11), that is, the upper and lower flat plates (19) and (21) from bulging outward.

上記実施形態において、この発明による熱交換器はコンプレッサのオイルクーラとして用いられているが、これに限定されるものではなく、ロードコンプレッサ、ガスタービン用コンプレッサ、鉄道車両用コンプレッサなどにおけるアフタークーラやラジエータとして用いられることもある。また、この発明による熱交換器からなるオイルクーラに、適当な構成のアフタークーラやラジエータが一体化されて用いられる場合がある。 In the above embodiment, the heat exchanger according to the present invention is used as an oil cooler of a compressor. However, the heat exchanger is not limited to this, and is not limited to this, and is an aftercooler or radiator in a load compressor, a gas turbine compressor, a railway vehicle compressor, or the like. Sometimes used as Moreover, an aftercooler or a radiator having an appropriate configuration may be integrated with an oil cooler including the heat exchanger according to the present invention.

さらに、この発明による熱交換器は、クレーン単体、デッキクレーン、クレーン車、ショベルカーなどの油圧機器や、工作機械に用いられるオイルを冷却するオイルクーラとして用いられる。 Furthermore, the heat exchanger according to the present invention is used as an oil cooler for cooling oil used in hydraulic equipment such as a crane alone, a deck crane, a crane truck, an excavator, or a machine tool.

この発明による熱交換器を適用したオイルクーラの全体構成を示す斜視図である。It is a perspective view which shows the whole structure of the oil cooler to which the heat exchanger by this invention is applied. オイルクーラの一部分を示す分解斜視図である。It is a disassembled perspective view which shows a part of oil cooler. オイルクーラの偏平中空体を示す伝熱面積拡大部を省略した一部切り欠き斜視図である。It is a partially-cutaway perspective view which abbreviate | omitted the heat-transfer area expansion part which shows the flat hollow body of an oil cooler. オイルクーラの偏平中空体の右端部を拡大して示す垂直断面図である。It is a vertical sectional view which expands and shows the right end part of the flat hollow body of an oil cooler. オイルクーラの偏平中空体の流路形成体の製造方法を示す左端部の部分斜視図である。It is a fragmentary perspective view of the left end part which shows the manufacturing method of the flow-path formation body of the flat hollow body of an oil cooler. オイルクーラの偏平中空体の流路形成体の製造方法を示す右端部の部分斜視図である。It is a fragmentary perspective view of the right end part which shows the manufacturing method of the flow-path formation body of the flat hollow body of an oil cooler. オイルクーラの下端部を示す分解斜視図である。It is a disassembled perspective view which shows the lower end part of an oil cooler. オイルクーラにおけるオイルの流れ方を示す図である。It is a figure showing how oil flows in an oil cooler. スペーサの変形例を示す斜視図である。It is a perspective view which shows the modification of a spacer.

符号の説明Explanation of symbols

(1)：オイルクーラ
(2)：偏平中空体
(3)：連通部材
(4)：スペーサ
(11)：上下壁
(12)：周壁
(12a)：右壁部
(12b)：前後両側壁部
(12c)：左壁部
(13)(14)：流路
(15)：仕切壁
(16)(17)：貫通穴
(18)：連通部
(19)(21)：平板
(19a)(21a)：屈曲部
(22)：流路形成体
(23)：サイドバー
(24)：中間バー
(25)：伝熱面積拡大部
(26)：エンドバー
(36)：貫通穴 (1): Oil cooler
(2): Flat hollow body
(3): Communication member
(4): Spacer
(11): Upper and lower walls
(12): Circumferential wall
(12a): Right wall
(12b): Front and rear side walls
(12c): Left wall
(13) (14): Channel
(15): Partition wall
(16) (17): Through hole
(18): Communication part
(19) (21): Flat plate
(19a) (21a): Bending part
(22): Channel formation body
(23): Sidebar
(24): Intermediate bar
(25): Heat transfer area expansion section
(26): End bar
(36): Through hole

Claims

上下方向に間隔をおいて並列状に配置されるとともに左右方向に伸びる複数の偏平中空体と、上下に隣り合う偏平中空体の左端部どうしの間に配置されかつ隣り合う偏平中空体の内部どうしを通じさせる連通部材と、隣り合う偏平中空体の右端部どうしの間に配置されたブロック状のスペーサとを備えており、偏平中空体が、左右方向に長い平らな上下壁と、上下壁の周縁間に跨る周壁と、内部を左右方向に伸びる２つの直線状流路に区切る仕切壁とよりなり、上下壁の左端部における仕切壁の前後両側部分に、それぞれ両直線状流路を連通部材に通じさせる２つの貫通穴が前後方向に間隔をおいて形成され、仕切壁の右端部が切除されて２つの直線状流路が相互に連通させられ、スペーサに前後方向に伸びる貫通穴が形成され、スペーサが、偏平中空体における仕切壁の切除部に対応する位置に配置されている熱交換器。 A plurality of flat hollow bodies arranged in parallel in the vertical direction and spaced in the left-right direction, and the interiors of the adjacent flat hollow bodies arranged between the left ends of the flat hollow bodies adjacent to each other in the vertical direction And a block-shaped spacer disposed between the right ends of adjacent flat hollow bodies, the flat hollow body having a flat upper and lower wall that is long in the left-right direction, and peripheral edges of the upper and lower walls. It consists of a peripheral wall that spans between and a partition wall that divides the interior into two linear channels that extend in the left-right direction. Both linear channels are connected to the front and rear sides of the partition wall at the left end of the upper and lower walls, respectively. Two through holes to be communicated are formed at intervals in the front-rear direction, the right end portion of the partition wall is cut off, the two linear flow paths are communicated with each other, and a through hole extending in the front-rear direction is formed in the spacer. , Spacer is Heat exchanger disposed in a position corresponding to the cut portion of the partition wall in the flat hollow bodies.

スペーサの左右方向の幅が、偏平中空体の仕切壁における切除部の左右方向の長さよりも大きくなっている請求項１記載の熱交換器。 The heat exchanger according to claim 1, wherein the width of the spacer in the left-right direction is larger than the length in the left-right direction of the cut portion in the partition wall of the flat hollow body.

スペーサに、前後方向に伸びる複数の貫通穴が、左右方向に並んで形成されている請求項１または２記載の熱交換器。 The heat exchanger according to claim 1 or 2, wherein a plurality of through holes extending in the front-rear direction are formed in the spacer side by side in the left-right direction.

スペーサの貫通穴の内周面に、貫通穴の長さ方向に伸びる複数の凸部および／または凹部が形成されている請求項１〜３のうちのいずれかに記載の熱交換器。 The heat exchanger according to any one of claims 1 to 3, wherein a plurality of convex portions and / or concave portions extending in a length direction of the through hole are formed on an inner peripheral surface of the through hole of the spacer.

偏平中空体が、上下方向に間隔をおいて配された左右方向に長い上下両平板と、両平板間に配されかつ両平板にろう付された流路形成体とよりなり、流路形成体が、上下両平板の前後両側縁部間にそれぞれ配されかつ左右方向に伸びる２つの直線状サイドバーと、両サイドバー間にこれらと間隔をおいて配されかつ左右方向に伸びる１つの中間バーと、両サイドバーおよび中間バーに跨って高さの中間部に一体に設けられた２つの伝熱面積拡大部と、両サイドバーの左端にそれぞれ一体に設けられて前後方向内方に伸び、かつ先端が中間バーの左端部の前後両側面に当接させられてろう付されたエンドバーとよりなり、中間バーの右端部が切除され、両伝熱面積拡大部の左端部がそれぞれ切除され、上下両平板の左端部における中間バーの前後両側部分にそれぞれ貫通穴が形成されており、上下両平板により上下壁が形成され、上下両平板の右端部をそれぞれ互いに他の平板側に曲げるとともにこれらの屈曲部を相互に重ね合わせてろう付することにより周壁の右壁部が形成され、流路形成体の両サイドバーにより周壁の前後両側壁部が形成され、流路形成体のエンドバーにより周壁の左壁部が形成されている請求項１〜４のうちのいずれかに記載の熱交換器。 The flat hollow body is composed of upper and lower flat plates that are long in the left-right direction and spaced apart in the vertical direction, and a flow path forming body that is disposed between the flat plates and brazed to both flat plates. Are arranged between the front and rear side edges of the upper and lower flat plates and extend in the left-right direction, and one intermediate bar arranged between the side bars and spaced apart from each other and extending in the left-right direction. And two heat transfer area expansion parts integrally provided in the middle part of the height across both side bars and the intermediate bar, and provided in the left end of both side bars, respectively, extend in the front-rear direction inward, And the tip is composed of an end bar that is brought into contact with the front and rear side surfaces of the left end portion of the intermediate bar and brazed, the right end portion of the intermediate bar is cut off, and the left end portions of both heat transfer area expansion portions are cut off, In front of the middle bar at the left end of both upper and lower plates Through holes are formed on both sides, and upper and lower plates form upper and lower walls. The right ends of the upper and lower plates are bent to each other and brazed by superimposing these bent portions on each other. The right wall portion of the peripheral wall is formed, the front and rear side wall portions of the peripheral wall are formed by both side bars of the flow path forming body, and the left wall portion of the peripheral wall is formed by the end bar of the flow path forming body. The heat exchanger in any one of 1-4.

上下両平板がそれぞれアルミニウムブレージングシートからなり、流路形成体がアルミニウム押出形材よりなる請求項５記載の熱交換器。 The heat exchanger according to claim 5, wherein the upper and lower flat plates are each made of an aluminum brazing sheet, and the flow path forming body is made of an aluminum extruded profile.

請求項１〜６のうちのいずれかに記載の熱交換器をオイルクーラとして備えている産業機械。 The industrial machine provided with the heat exchanger in any one of Claims 1-6 as an oil cooler.

請求項１〜６のうちのいずれかに記載の熱交換器をアフタークーラとして備えている産業機械。 The industrial machine provided with the heat exchanger in any one of Claims 1-6 as an aftercooler.

請求項１記載の熱交換器を製造する方法であって、
前後方向に間隔をおいて設けられかつ左右方向に伸びる２つの直線状サイドバーと、両サイドバー間にこれらと間隔をおいて設けられかつ左右方向に伸びる中間バーと、両サイドバーおよび中間バーに跨って高さの中間部に一体に設けられた平板状部とよりなる流路形成体用素材、左右方向に長い上下２枚の平板、前後方向に間隔をおいて上下方向に伸びる２つの貫通穴が形成された連通部材、ならびに前後方向に伸びる貫通穴が形成されたスペーサを用意し、
流路形成体用素材の中間バーの左右両端部を切除するとともに両平板状部の左端部を中間バーの左端部の切除長さよりも長くなるように切除すること、流路形成体用素材の両平板状部にそれぞれプレス加工を施すことにより伝熱面積拡大部を形成すること、および流路形成体用素材の両サイドバーの左端部をそれぞれ前後方向内方に曲げてその先端を中間バーの左端部の前後両側面に当接させてエンドバーを形成することにより流路形成体をつくり、
両平板の右端部をそれぞれ互いに反対側の平板側に曲げて屈曲部を形成するとともに、両平板の左端部における中間バーの前後両側に位置する部分にそれぞれ貫通穴を形成し、
上下両平板間に流路形成体を介在させてなる複数の組み合わせ体を上下に間隔をおいて並列状に配し、上下に隣り合う組み合わせ体の左端部間に、２つの貫通穴が平板の２つの貫通穴と通じるように連通部材を配するとともに、同右端部間にスペーサを配し、さらに上下に隣り合う組み合わせ体間における連通部材とスペーサとの間にフィンを配し、
上下両平板と流路形成体の両サイドバー、中間バーおよびエンドバー、両エンドバーの先端部と中間バー、ならびに平板の屈曲部どうしをそれぞれろう付し、さらに平板と連通部材、スペーサおよびフィンとをろう付することを特徴とする熱交換器の製造方法。 A method for producing a heat exchanger according to claim 1, comprising:
Two linear side bars that are spaced apart in the front-rear direction and extend in the left-right direction, an intermediate bar that is spaced between them and extends in the left-right direction, and both the side bars and the intermediate bar A material for a flow path forming body composed of a flat plate portion integrally provided at an intermediate portion of the height, two upper and lower flat plates extending in the left-right direction, and two extending in the vertical direction at intervals in the front-rear direction Prepare a communication member with a through hole and a spacer with a through hole extending in the front-rear direction.
Cutting both the left and right ends of the intermediate bar of the flow path forming body material and cutting the left end portions of both flat plate-like portions to be longer than the cutting length of the left end portion of the intermediate bar, Forming the heat transfer area enlargement part by pressing each flat plate part respectively, and bending the left end part of both side bars of the material for the flow path forming body inward in the front-rear direction, respectively, and the tip of the intermediate bar Create a flow path forming body by contacting the front and rear side surfaces of the left end part of the
Bend the right end of both flat plates to the opposite flat plate side to form a bent portion, and form through holes in the portions located on the front and rear sides of the intermediate bar at the left end of both flat plates,
A plurality of combined bodies each having a flow path forming body interposed between the upper and lower flat plates are arranged in parallel at intervals in the vertical direction, and two through holes are formed between the left end portions of the upper and lower adjacent combined bodies. The communication member is arranged so as to communicate with the two through holes, the spacer is arranged between the right end portions, and the fin is arranged between the communication member and the spacer between the upper and lower adjacent combinations,
The upper and lower flat plates and the side bars of the flow path forming body, the intermediate bar and end bar, the tip and intermediate bars of both end bars, and the bent portions of the flat plate are brazed to each other. A method for producing a heat exchanger, characterized by brazing.

平板をアルミニウムブレージングシートで形成し、連通部材、スペーサおよび流路形成体用素材をアルミニウム押出形材で形成し、フィンをアルミニウム薄板で形成し、上記ろう付を平板から溶け出したろう材により行う請求項９記載の熱交換器の製造方法。 A flat plate is formed of an aluminum brazing sheet, a communicating member, a spacer, and a flow path forming body material are formed of an aluminum extruded shape, a fin is formed of an aluminum thin plate, and the brazing is performed by a brazing material melted from the flat plate. Item 10. A method for manufacturing a heat exchanger according to Item 9.

スペーサの左右方向の幅を、流路形成体用素材の中間バーにおける右端部側の切除部の左右方向の長さよりも大きくしておく請求項９または１０記載の熱交換器の製造方法。 The method for manufacturing a heat exchanger according to claim 9 or 10, wherein the width in the left-right direction of the spacer is set to be larger than the length in the left-right direction of the cut-out part on the right end side of the intermediate bar of the flow path forming body material.

スペーサに、前後方向に伸びる複数の貫通穴を形成しておく請求項９〜１１のうちのいずれかに記載の熱交換器の製造方法。 The manufacturing method of the heat exchanger in any one of Claims 9-11 in which the several through-hole extended in the front-back direction is formed in the spacer.

スペーサの貫通穴の内周面に、貫通穴の長さ方向に伸びる複数の凸部および／または凹部を形成しておく請求項９〜１２のうちのいずれかに記載の熱交換器の製造方法。 The manufacturing method of the heat exchanger in any one of Claims 9-12 which form the some convex part and / or recessed part which extend in the length direction of a through-hole in the internal peripheral surface of the through-hole of a spacer. .