JP2004092948A - Tank of heat exchanger - Google Patents

Tank of heat exchanger Download PDF

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Publication number
JP2004092948A
JP2004092948A JP2002251706A JP2002251706A JP2004092948A JP 2004092948 A JP2004092948 A JP 2004092948A JP 2002251706 A JP2002251706 A JP 2002251706A JP 2002251706 A JP2002251706 A JP 2002251706A JP 2004092948 A JP2004092948 A JP 2004092948A
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Japan
Prior art keywords
tank
heat exchanger
sheet metal
partition plate
upper tank
Prior art date
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Pending
Application number
JP2002251706A
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Japanese (ja)
Inventor
Mitsuru Kimata
木全　充
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Denso Corp
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Denso Corp
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Priority to JP2002251706A priority Critical patent/JP2004092948A/en
Publication of JP2004092948A publication Critical patent/JP2004092948A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • 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
    • F28F9/0224—Header boxes formed by sealing end plates into covers
    • 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
    • F28F9/0202—Header boxes having their inner space divided by partitions
    • F28F9/0204—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions
    • F28F9/0209—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions having only transversal partitions
    • F28F9/0212—Header boxes having their inner space divided by partitions for elongated header box, e.g. with transversal and longitudinal partitions having only transversal partitions the partitions being separate elements attached to header boxes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2220/00—Closure means, e.g. end caps on header boxes or plugs on conduits

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

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tank of a heat exchanger reducing a clearance between a partitioning plate and an inner wall of a sheet metal or a capsule, and effectively preventing the impairing of the heat exchanging efficiency caused by the leakage of the fluid from the clearance. <P>SOLUTION: This heat exchanger 1 comprises an upper tank 2 and a lower tank 3 vertically arranged in parallel with each other, the upper tank 2 has a structure formed by abutting and joining the sheet metal 4 and the sheath-shaped capsule 5. The partitioning plate 7 having the shape same as the transverse section of the upper tank 2 is mounted in the upper tank 2. The fixing of the partitioning plate 7 to the upper tank 2 is achieved by fitting insertion parts 71, 72 projected from a lower side of the partitioning plate 7 into both corner slits 43, 44 formed at both corners of a bottom plate part 41 of the sheet metal 4 orthogonal to the longitudinal direction, and brazing them. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
この発明は、シートメタルにキャプセルを突き合わせるとともに、仕切り板で内部を上流側と下流側とに仕切った熱交換器のタンクに関する。
【０００２】
【従来の技術】
自動車の空調装置には、エンジン冷却水の廃熱を利用した熱交換器がヒータコアとして使用されている。この熱交換器は、上側タンクと下側タンクとを、平行して列設した多数のチューブで連通し、チューブ間に放熱フィンを配し、真空炉などの炉中でロウ付けして一体形成される。上側タンクと下側タンクとは、外周縁と底板部とを有するシートメタルと、外周縁に嵌まり込む内嵌縁を備えたキャプセルを突き合わせた構造を有する。
【０００３】
ヒータコアでは、暖房効果を向上させるため、上側（左側）タンクと下側（右側）タンクの一方または双方に、タンク内を上流側と下流側とに仕切る仕切り板を設置し、流体を両タンク間をＵターン状またはＮターン状に流すことが行われている。この仕切り板の固定方法として、シートメタルまたはキャプセルの中央にスリットを形成し、このスリットに仕切り板に設けた差込部を差し込んでロウ付けする構成が提案されている（例えば、特許文献１参照。）。
【０００４】
【特許文献１】
実開平３−１２８２６１号公報（第１〜１２図）
【０００５】
【発明が解決しようとする課題】
シートメタルおよびキャプセルは生産性の観点からプレス成形される。このため寸法公差が大きく、仕切り板と、シートメタルまたはキャプセルの内壁（タンク内壁）との間に隙間ができる。この隙間を通じて流体が上流側から下流側に漏れ、熱交換効率が低下する問題が生じている。とくに、シートメタルの外周縁と底板部との角部など曲率半径の小さい曲げ部分や、段差が生じる内嵌縁の先端部の近傍では、仕切り板との間に隙間ができ易い。従来の仕切り板の固定方法では、隙間のでき易い部分に差込部がないため、流体の漏れを有効に阻止できない。この隙間は、寸法公差を精密に設定すれば低減できるが、設備投資の増大や製品の寸法管理に要する手間により製造コストが上昇する問題がある。
【０００６】
この発明の目的は、スリットと仕込み部の形成位置を適切に選択することにより、仕切り板と、シートメタルまたはキャプセルの内壁との間の隙間を低減でき、流体の隙間からの漏れによる熱交換効率の低下を有効に防止できる熱交換器のタンクの提供にある。
【０００７】
【課題を解決するための手段】
請求項１に記載の発明は、底板部の少なくとも両隅部に設けたスリットに、仕切り板に設けた差込部を差し込んでロウ付けしている。このため、タンクの断面の内で最も隙間のでき易いシートメタルの底板部と外周縁との角（コーナー）部において、仕切り板との隙間を確実に塞ぐことができる。この結果、タンクの内壁と仕切り板との隙間を通じて、上流側から下流側へ漏れる流体を低減でき、液体が短絡して熱交換効率が低減することを有効に防止できる。また、設備投資の増大や寸法管理に要する手間による製造コストの上昇を最小限におさえることが可能である。なお、スリットは、シートメタルの底板部の全幅に渡るもの、両隅部と中央の３カ所以上であってもよい。
【０００８】
請求項２に記載の発明では、スリットに対向してキャプセルの中央部に設けた対向スリットに、仕切り板に設けた対向差込部を差し込んでロウ付けしている。この構成では、さらに、タンクの内壁と仕切り板との隙間を通じて、上流側から下流側へ漏れる流体を低減でき、液体が短絡して熱交換効率が低減することを有効に防止でき、暖房効率など熱効率の向上が得られる。
【０００９】
【発明の実施の形態】
図１、図３および図４はこの発明の第１実施例にかかる上側タンク２を示し、自動車の空調装置内に設置され、エンジンの冷却水を熱源とするヒータコアとして使用される熱交換器１（図２に示す）に組み込まれている。熱交換器１は、上下に平行して配された横長の上側タンク２および下側タンク３を備える。
【００１０】
上側タンク２は、シートメタル４と、莢状のキャプセル５とを突き合わせて接合した構造を有する。シートメタル４は、横長の底板部４１および底板部４１の外周から上方に延長された外周縁４２を有する。キャプセル５は、底板部４１に対応した天板部５１と、天板部５１の外周から下方に延長され、下部が外周縁４２に嵌まり込む内嵌縁５２を有する。下側タンク３は、上側タンク２と略上下に対称の構造を有し、シートメタル３１とキャプセル３２とを突き合わせて接合している。
【００１１】
キャプセル５の中央部の上面にはパイプ状を呈する温水の流出口１１が設けられ、キャプセル３２の左右の端部には、パイプ状を呈する温水の流入口１２、１２が設けられている。上側タンク２および下側タンク３は、中央部に配した集中管１３と、該集中管１３の左右に平行して対称的に配した多数の偏平チューブ６とで連通されている。
【００１２】
偏平チューブ６の外側には、上側タンク２および下側タンク３の左右両端を連結するサイドプレート１４、１４が平行して設置されている。集中管１３および偏平チューブ６の上下端は、シートメタル４およびシートメタル３１を貫通して接続されている。集中管１３、偏平チューブ６およびサイドプレート１４の隙間には、コルゲートフィン１５が設置されている。
【００１３】
上側タンク２内には、上側タンク２の横断面と同一の形状を有し、下流側（集中管１３側）２Ａと、上流側（偏平チューブ６、６側）２Ｂ、２Ｂとの間を仕切る仕切り板７、７が設置されている。下側タンク３内には、外側（上流側）３Ａ、３Ａと、内側（下流側）３Ｂとに仕切る仕切り８、８が設置されている。
【００１４】
仕切り板７の上側タンク２内への取り付けを、図２〜図４とともに説明する。シートメタル４の底板部４１の両隅部（底板部４１の中央寄りから外周縁４２の内壁面までの位置）に、長手方向と直行的に同一平面内の両隅スリット４３、４４が設けられている。仕切り板７には、両隅スリット４３、４４に対応して、下辺に差込部７１、７２を突設している。
【００１５】
仕切り板７は、差込部７１、７２を両隅スリット４３、４４に差し込んで組み付けられ、その後にロウ付けして固着される。このため、差込部７１、７２と両隅スリット４３、４４とで塞がれる上側タンク２内の両隅部７Ａ、７Ｂは、完全にシールがなされる。この両隅部７Ａ、７Ｂは、仕切り板７と上側タンク２の内壁との寸法のバラツキにより最も隙間のでき易い部分であるが、この発明ではこの最も隙間のでき易い部分を確実にシールする作用を有する。なお、両隅スリット４３、４４は、底板部４１を貫通する打ち抜きであっても、有底の溝であってもよい。仕切り板８の下側タンク３への取り付けも、仕切り板７と同様である。
【００１６】
熱交換器１の製造は、上側タンク２、下側タンク３、偏平チューブ６、コルゲートフィン１５、仕切り板７、８などの部品の要所にロウ材を積層したクラッド材を用い、一体に組み立てた後に、真空炉中で同時にロウ付けして行われる。
【００１７】
図５は、第２実施例を示す。この実施例では、シートメタル４の底板部４１の全幅に渡る全幅スリット４５を形成し、仕切り板７の下辺には全幅に渡る差し込み部７３を形成している。また、キャプセル５の中央に対向スリット５３を形成し、仕切り板７の上辺中央に対向差込部７５を設けている。この構成では、仕切り板７と底板部４１との隙間、および仕切り板７の上辺とキャプセル５の内壁との隙間を完全に塞ぐことができ、かつ仕切り板７をシートメタル４に組み付けた際に、仕切り板７の組み付け安定性が向上できる。
【００１８】
図６は、第３実施例を示す。この実施例では、第２実施例の全幅スリット４５を、両隅スリット４３、４４と、その中間の中央スリット４６に３分割し、仕切り板７の下辺中央に差し込み部７４を設けている。この構成では、シートメタル４の構造強度の低下を防ぐことができるとともに、仕切り板７をシートメタル４に組み付けた際の組み付け安定性がさらに向上できる。
【図面の簡単な説明】
【図１】第１実施例の上側タンクの要部の斜視図である。
【図２】熱交換器の正面図である。
【図３】第１実施例の上側タンクの要部の組付図である。
【図４】第１実施例の上側タンクの横断面図および仕切り板の正面図である。
【図５】第２実施例の上側タンクの要部の斜視図である。
【図６】第３実施例の上側タンクの要部の斜視図である。
【符号の説明】
１　　熱交換器
２　　上側タンク
３　　下側タンク
４　　シートメタル
４１　底板部
４２　外周縁
４３　両隅スリット
４４　両隅スリット
５　　キャプセル
５２　内嵌縁
５３　対向スリット
６　　偏平チューブ
７　　仕切り板
７１　差込部
７２　差込部
７５　対向差込部[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a heat exchanger tank in which a capsule is abutted against a sheet metal and the interior is partitioned into an upstream side and a downstream side by a partition plate.
[0002]
[Prior art]
2. Description of the Related Art In an air conditioner of an automobile, a heat exchanger using waste heat of engine cooling water is used as a heater core. In this heat exchanger, the upper tank and the lower tank are communicated with a number of tubes arranged in parallel, radiating fins are arranged between the tubes, and brazed in a furnace such as a vacuum furnace to be integrally formed. Is done. The upper tank and the lower tank have a structure in which a sheet metal having an outer peripheral edge and a bottom plate portion and a capsule having an inner fitting edge fitted into the outer peripheral edge are abutted.
[0003]
In the heater core, in order to improve the heating effect, a partition plate is installed in one or both of the upper (left) tank and the lower (right) tank to partition the inside of the tank into an upstream side and a downstream side. Is flowed in a U-turn shape or an N-turn shape. As a method for fixing the partition plate, there has been proposed a configuration in which a slit is formed in the center of a sheet metal or a capsule, and an insertion portion provided on the partition plate is inserted into the slit and brazed (for example, see Patent Document 1). .).
[0004]
[Patent Document 1]
Japanese Utility Model Laid-Open Publication No. 3-128261 (FIGS. 1 to 12)
[0005]
[Problems to be solved by the invention]
The sheet metal and the capsule are press-formed from the viewpoint of productivity. For this reason, the dimensional tolerance is large, and a gap is formed between the partition plate and the inner wall of the sheet metal or the capsule (the inner wall of the tank). Fluid leaks from the upstream side to the downstream side through this gap, causing a problem that the heat exchange efficiency is reduced. In particular, a gap is easily formed between the sheet metal and the partition plate near a bent portion having a small radius of curvature, such as a corner portion between the outer peripheral edge and the bottom plate portion, or near the tip of the inner fitting edge where a step is formed. In the conventional partition plate fixing method, since there is no insertion portion in a portion where a gap is likely to be formed, leakage of fluid cannot be effectively prevented. This gap can be reduced if the dimensional tolerance is set precisely, but there is a problem that the production cost increases due to an increase in capital investment and labor required for dimensional control of the product.
[0006]
An object of the present invention is to reduce the gap between the partition plate and the inner wall of the sheet metal or the capsule by appropriately selecting the formation positions of the slit and the charging section, and to reduce the heat exchange efficiency due to leakage from the gap of the fluid. It is an object of the present invention to provide a heat exchanger tank capable of effectively preventing the deterioration of the heat exchanger.
[0007]
[Means for Solving the Problems]
According to the first aspect of the present invention, the insertion portions provided on the partition plate are inserted into the slits provided in at least both corners of the bottom plate portion and brazed. For this reason, at the corner (corner) between the sheet metal bottom plate and the outer peripheral edge where the gap is most likely to occur in the cross section of the tank, the gap with the partition plate can be reliably closed. As a result, the fluid leaking from the upstream side to the downstream side through the gap between the inner wall of the tank and the partition plate can be reduced, and it is possible to effectively prevent the liquid from being short-circuited and reducing the heat exchange efficiency. In addition, it is possible to minimize an increase in manufacturing costs due to an increase in capital investment and labor required for dimensional control. The slits may extend over the entire width of the bottom portion of the sheet metal, or may be provided at three or more locations at both corners and the center.
[0008]
According to the second aspect of the present invention, the opposed insertion portion provided on the partition plate is inserted and brazed to the opposed slit provided in the center portion of the capsule facing the slit. In this configuration, it is possible to further reduce the fluid leaking from the upstream side to the downstream side through the gap between the inner wall of the tank and the partition plate, effectively prevent the liquid from being short-circuited and reduce the heat exchange efficiency, and improve the heating efficiency. Improved thermal efficiency is obtained.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
FIGS. 1, 3 and 4 show an upper tank 2 according to a first embodiment of the present invention, which is installed in an air conditioner of an automobile and is used as a heater core which is used as a heater core using cooling water of an engine as a heat source. (Shown in FIG. 2). The heat exchanger 1 includes a horizontally-long upper tank 2 and a lower tank 3 which are arranged vertically in parallel.
[0010]
The upper tank 2 has a structure in which a sheet metal 4 and a pod-shaped capsule 5 are abutted and joined. The sheet metal 4 has a horizontally long bottom plate portion 41 and an outer peripheral edge 42 extending upward from the outer periphery of the bottom plate portion 41. The capsule 5 has a top plate portion 51 corresponding to the bottom plate portion 41 and an inner fitting edge 52 extending downward from the outer periphery of the top plate portion 51 and having a lower portion fitted into the outer peripheral edge 42. The lower tank 3 has a structure that is substantially vertically symmetrical with the upper tank 2, and joins the sheet metal 31 and the capsule 32 by abutting each other.
[0011]
Pipe-shaped hot water outlets 11 are provided on the upper surface of the central portion of the capsule 5, and pipe-shaped hot water inlets 12, 12 are provided at left and right ends of the capsule 32. The upper tank 2 and the lower tank 3 are communicated with a centralized pipe 13 arranged in the center and a number of flat tubes 6 arranged symmetrically in parallel to the left and right of the concentrated pipe 13.
[0012]
Outside the flat tube 6, side plates 14, 14 connecting the left and right ends of the upper tank 2 and the lower tank 3 are installed in parallel. The upper and lower ends of the centralized pipe 13 and the flat tube 6 are connected through the sheet metal 4 and the sheet metal 31. Corrugated fins 15 are provided in gaps between the concentrated pipe 13, the flat tubes 6, and the side plates 14.
[0013]
The upper tank 2 has the same shape as the cross section of the upper tank 2 and partitions between the downstream side (concentration tube 13 side) 2A and the upstream side (flat tubes 6, 6 side) 2B, 2B. Partition plates 7, 7 are provided. In the lower tank 3, partitions 8, 8 for partitioning into outer (upstream) 3 </ b> A, 3 </ b> A and inner (downstream) 3 </ b> B are provided.
[0014]
The installation of the partition plate 7 in the upper tank 2 will be described with reference to FIGS. At both corners of the bottom plate portion 41 of the sheet metal 4 (positions from the center of the bottom plate portion 41 to the inner wall surface of the outer peripheral edge 42), both corner slits 43 and 44 are provided in the same plane perpendicular to the longitudinal direction. ing. The partition plate 7 has insertion portions 71 and 72 projecting from the lower side corresponding to the two corner slits 43 and 44.
[0015]
The partition plate 7 is assembled by inserting the insertion portions 71 and 72 into the corner slits 43 and 44, and then brazed and fixed. For this reason, both corners 7A and 7B in the upper tank 2 which are closed by the insertion portions 71 and 72 and both corner slits 43 and 44 are completely sealed. The corners 7A and 7B are portions where a gap is most likely to be formed due to a variation in dimensions between the partition plate 7 and the inner wall of the upper tank 2. According to the present invention, the portion where the gap is most easily formed is securely sealed. Having. The corner slits 43 and 44 may be punched through the bottom plate 41 or may be bottomed grooves. The attachment of the partition plate 8 to the lower tank 3 is the same as that of the partition plate 7.
[0016]
The heat exchanger 1 is manufactured by using a clad material obtained by laminating a brazing material at important parts of parts such as the upper tank 2, the lower tank 3, the flat tube 6, the corrugated fins 15, and the partition plates 7 and 8, and integrally assembling them. After that, brazing is performed simultaneously in a vacuum furnace.
[0017]
FIG. 5 shows a second embodiment. In this embodiment, a full width slit 45 is formed over the entire width of the bottom plate portion 41 of the sheet metal 4, and an insertion portion 73 is formed on the lower side of the partition plate 7 over the entire width. An opposing slit 53 is formed at the center of the capsule 5, and an opposing insertion portion 75 is provided at the center of the upper side of the partition plate 7. With this configuration, the gap between the partition plate 7 and the bottom plate portion 41 and the gap between the upper side of the partition plate 7 and the inner wall of the capsule 5 can be completely closed, and when the partition plate 7 is assembled to the sheet metal 4, Thus, the assembling stability of the partition plate 7 can be improved.
[0018]
FIG. 6 shows a third embodiment. In this embodiment, the full width slit 45 of the second embodiment is divided into three corner slits 43 and 44 and a middle slit 46 therebetween, and an insertion portion 74 is provided at the center of the lower side of the partition plate 7. With this configuration, it is possible to prevent a decrease in the structural strength of the sheet metal 4 and to further improve the assembling stability when the partition plate 7 is assembled to the sheet metal 4.
[Brief description of the drawings]
FIG. 1 is a perspective view of a main part of an upper tank according to a first embodiment.
FIG. 2 is a front view of the heat exchanger.
FIG. 3 is an assembly diagram of a main part of an upper tank of the first embodiment.
FIG. 4 is a cross-sectional view of an upper tank and a front view of a partition plate of the first embodiment.
FIG. 5 is a perspective view of a main part of an upper tank according to a second embodiment.
FIG. 6 is a perspective view of a main part of an upper tank according to a third embodiment.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 heat exchanger 2 upper tank 3 lower tank 4 sheet metal 41 bottom plate portion 42 outer peripheral edge 43 both corner slits 44 both corner slits 5 capsule 52 inner fitting edge 53 opposed slit 6 flat tube 7 partition plate 71 insertion portion 72 insertion Part 75 Opposite insertion part

Claims (2)

外周縁と底板部とを備えたシートメタルに、前記外周縁に嵌まり込む内嵌縁を有するキャプセルを突き合わせるとともに、内部に上流側と下流側とに仕切る仕切り板を配し、ロウ付けして一体形成する熱交換器のタンクにおいて、前記底板部の少なくとも両隅部に設けたスリットに、前記仕切り板に設けた差込部を差し込んでロウ付けしたことを特徴とする熱交換器のタンク。A capsule having an inner fitting edge fitted into the outer peripheral edge is abutted against a sheet metal having an outer peripheral edge and a bottom plate portion, and a partition plate for partitioning the inside into an upstream side and a downstream side is arranged and brazed. In the heat exchanger tank integrally formed, the heat exchanger tank characterized in that the insertion portion provided in the partition plate is inserted and brazed into slits provided in at least both corners of the bottom plate portion. . 請求項１に記載の熱交換器のタンクにおいて、前記スリットに対向して前記キャプセルの中央部に設けた対向スリットに、前記仕切り板に設けた対向差込部を差し込んでロウ付けしたことを特徴とする熱交換器のタンク。The heat exchanger tank according to claim 1, wherein an opposed insertion portion provided on the partition plate is inserted and brazed into an opposed slit provided in a central portion of the capsule so as to face the slit. And heat exchanger tank.
JP2002251706A 2002-08-29 2002-08-29 Tank of heat exchanger Pending JP2004092948A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3089606A1 (en) * 2018-12-10 2020-06-12 Valeo Systemes Thermiques COLLECTOR BOX FOR HEAT EXCHANGER AND HEAT EXCHANGER COMPRISING SUCH A COLLECTOR BOX
FR3089610A1 (en) * 2018-12-10 2020-06-12 Valeo Systemes Thermiques COLLECTOR BOX FOR HEAT EXCHANGER AND HEAT EXCHANGER COMPRISING SUCH A COLLECTOR BOX

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3089606A1 (en) * 2018-12-10 2020-06-12 Valeo Systemes Thermiques COLLECTOR BOX FOR HEAT EXCHANGER AND HEAT EXCHANGER COMPRISING SUCH A COLLECTOR BOX
FR3089610A1 (en) * 2018-12-10 2020-06-12 Valeo Systemes Thermiques COLLECTOR BOX FOR HEAT EXCHANGER AND HEAT EXCHANGER COMPRISING SUCH A COLLECTOR BOX

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