JP4164799B2 - EGR cooler - Google Patents

EGR cooler Download PDF

Info

Publication number
JP4164799B2
JP4164799B2 JP2002346566A JP2002346566A JP4164799B2 JP 4164799 B2 JP4164799 B2 JP 4164799B2 JP 2002346566 A JP2002346566 A JP 2002346566A JP 2002346566 A JP2002346566 A JP 2002346566A JP 4164799 B2 JP4164799 B2 JP 4164799B2
Authority
JP
Japan
Prior art keywords
flat
pair
casing
entrance
bulging
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP2002346566A
Other languages
Japanese (ja)
Other versions
JP2004177060A (en
Inventor
俊道 小林
敏克 八谷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
T.RAD CO., L T D.
Original Assignee
T.RAD CO., L T D.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by T.RAD CO., L T D. filed Critical T.RAD CO., L T D.
Priority to JP2002346566A priority Critical patent/JP4164799B2/en
Publication of JP2004177060A publication Critical patent/JP2004177060A/en
Application granted granted Critical
Publication of JP4164799B2 publication Critical patent/JP4164799B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Landscapes

  • Exhaust-Gas Circulating Devices (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、車両の排ガス再循環装置における排ガスを冷却するＥＧＲクーラに関し、特に多数の偏平チューブを並列させ、その偏平チューブ内に排ガスを流通させると共に、偏平チューブの外面側に冷却水を流通させるものにおいて、その冷却水を偏平チューブの各部に均等に流通させるものに関する。
【０００２】
【従来の技術】
多数の偏平チューブを並列させ、夫々の偏平チューブの両端を一対のヘッダに連通してコアを構成し、そのコアの外周をケーシングにより被嵌したＥＧＲクーラが知られている。そして各偏平チューブ内に高温の排ガスを流通させ、偏平チューブの外面側に冷却水を流通させ、両流体間に熱交換を行っていた。
このようなＥＧＲクーラにおいて、偏平チューブの各部に冷却水を均一に流通させる手段として、バッフルプレートを偏平チューブの長手方向に互いに離間し千鳥状に配置したものが知られている。そして、冷却水をこのバッフルプレートによって蛇行状に流通させていた（例えば、特許文献１参照。）。
【０００３】
【特許文献１】
特開平１０−１８５４８９号公報
【０００４】
【発明が解決しようとする課題】
複数のバッフルプレートを千鳥状に配置したＥＧＲクーラは、その部品点数が多くなると共に、取付けが面倒である欠点があった。
なお、このようなバッフルプレートを無くすと図３に示す如く、偏平チューブの各部に淀み領域１ａが生じる新たな問題が生じる。即ち、ケーシング７の対向する平面で夫々長手方向の一端および他端に一対の出入口６，６ａを形成し、一方の出入口６から他方の出入口６ａに冷却水を流通させると、偏平チューブ２の平坦面１各部では、冷却水11の比較的流通の速い流通領域１ｂと、比較的遅く淀みが生じがちな淀み領域１ａとが存在する。すると、この淀み領域１ａで排ガス10の加熱により水の沸騰が生じる場合がある。それと共に、全体として熱交換量が低下する欠点がある。
そこで本発明は、部品点数を増やすことなく構造が簡単で且つ、偏平チューブの各部に均一に冷却水を流すことができるＥＧＲクーラを提供することを課題とする。
【０００５】
【課題を解決するための手段】
請求項１に記載の本発明は、外周に一対の平坦面（１） がその断面の長軸方向に平行に形成されて内部に排ガスが流通する複数の細長い偏平チューブ（２）を有し、夫々の偏平チューブ（２）の平坦面（１） が隙間を有して互いに対向するように並列され、夫々の偏平チューブ（２）の両端が貫通固定された一対のヘッダ（３）を有するコア（４）と、そのコア（４）の外周が被嵌されるケーシング（７）と、そのケーシング（７）の両端位置で、夫々の前記偏平チューブ（２）の断面の長径方向に対向する一対の側面（５）に開口され且つ、それぞれの開口が前記ケーシング（７）の対角位置の近傍に配置された冷却水の出入口（６）（６ａ）と、
を具備するＥＧＲクーラにおいて、
前記各出入口（６）（６ａ）の中心線に対して、その出入口に隣接するヘッダープレート（３ａ）の略対称位置で、その出入口の対向面近傍を除き、それぞれの前記偏平チューブ（２）の平坦面の外面に複数の流通阻害用の膨出部（８）がその出入口の近傍から定間隔に突出されて、一対の第１の膨出部群を形成し、
一対の前記第１の膨出部群間が複数にほぼ等分され、その等分の各境の位置で、第１の膨出部群および隣接する他の膨出群に対して、千鳥状に複数の第２の膨出部群がそれぞれの前記偏平チューブ（２）の外面に突出され、その第２の膨出部群は前記第１の膨出部群と同様の複数の前記膨出部（８）からなることを特徴とするＥＧＲクーラ。
【０００６】
請求項２に記載の本発明は、外周に一対の平坦面（１）がその断面の長軸方向に平行に形成されて内部に排ガスが流通する複数の細長い偏平チューブ（２）を有し、夫々の偏平チューブ（２）の平坦面（１）が隙間を有して互いに対向するように並列され、夫々の偏平チューブ（２） の両端が貫通固定された一対のヘッダ（３） を有するコア（４）と、そのコア（４）の外周が被嵌されるケーシング（７）と、そのケーシング（７）の両端位置で、夫々の前記偏平チューブ（２）の断面の長径方向に対向する一対の側面（５）に開口され且つ、それぞれの開口が前記ケーシング（７）の対角位置の近傍に配置された冷却水の出入口（６）（６ａ）と、を具備するＥＧＲクーラにおいて、
前記各出入口（６）（６ａ）の中心線に対して、その出入口に隣接するヘッダープレート（３ａ）の略対称位置で、その出入口の対向面近傍を除き、それぞれの前記偏平チューブ（２）の平坦面の外面に凸条からなる流通阻害用の膨出部（８）がその出入口の近傍から対向面側に形成されて、一対の第１の膨出部を形成し、
一対の前記第１の膨出部間が複数にほぼ等分され、その各境の位置で、第１の膨出部および互いに隣接する他の膨出部に対して、千鳥状に複数の第２の膨出部がそれぞれの前記偏平チューブ（２）の外面に突出され、その第２の膨出部は前記第１の膨出部と同様の前記膨出部（８）からなることを特徴とするＥＧＲクーラである。
【０００７】
請求項３に記載の本発明は、請求項１または請求項２において、
前記出入口（６）（６ａ）を有する側面で、その出入口の対向位置および、第２の膨出部群または第２の膨出部と前記ケーシング（７）の前記側面との間でより広い方の空間に対向する位置で、そのケーシング（７）の前記側面の内面側に凹陥する流通抵抗減少用の隙間拡大部（９）を設けたＥＧＲクーラである。
【０００８】
【発明の実施の形態】
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。
図１は本発明のＥＧＲクーラの一部破断斜視図であり、図２はその一部破断平面図、図５は図２のＶ−Ｖ矢視断面略図である。
このＥＧＲクーラは、複数の偏平チューブ２が並列されている。各偏平チューブ２は、外周に一対の平坦面１がその断面の長軸方向に平行に形成され、夫々の偏平チューブ２の平坦面１が隙間を有して互いに対向するように並列される。そして夫々の偏平チューブ２の両端が、ヘッダ３のヘッダプレート３ａに貫通固定されコア４を構成する。さらに、そのコア４の外周に僅かな隙間を開けてケーシング７が被嵌される。
【０００９】
この例では、ケーシング７の両端がヘッダプレート３ａに液密に固定されている。そしてケーシング７の長手方向の一端および他端の各側面に出入口６，６ａを設けている。この例が図３のそれと異なる点は、偏平チューブ２の淀み領域１ａを除いて流通領域１ｂに多数の膨出部８を突設形成したことである。
さらには図３の淀み領域１ａに対向する内側面には、図１の如く、凹陥する流通抵抗減少用の隙間拡大部９が形成されている。
【００１０】
このようにすることにより、一方の出入口６から流入した冷却水11は、矢印の如く図３における各淀み領域１ａにも充分流通すると共に、各膨出部８の隙間を通る冷却水も存在する。その結果、偏平チューブ２の平坦面１の各部で冷却水11が略均等に流通する。即ち、図３における淀み領域１ａが消滅する。それにより、冷却水の淀み領域で生じていた冷却水の沸騰が防止される。
また、この例では隣接する偏平チューブ２の膨出部８どうしが接触するように形成され、その接触部がろう付け固定されている。
なお、隣接する偏平チューブ２の膨出部８間に隙間を形成してもよい。
【００１１】
次に、図４は本発明の第２の実施の形態であり、この例が図２のそれと異なる点は膨出部８の形状のみである。図２においての膨出部８は、平面円形で横断面台形状のものとしたが、図４の例での膨出部８は、平面が長円形で横断面が台形に形成されたものである。
このような膨出部８においても、図２の例と同様に偏平チューブ２の平坦面１の各部に均一に冷却水11が流通する。
【００１２】
次に、図６，図７は本発明の第３の実施の形態であり、この例が図４のそれと異なる点は、平面が長円径の膨出部８の配置方向であり、この例では各膨出部８が偏平チューブ２外面の幅方向に形成されている。そしてそれが、偏平チューブ２の長手方向に離間して千鳥状に配置されているものである。
その結果、冷却水11は夫々の膨出部８を迂回して流通するため、偏平チューブ２の外面を蛇行状に流通することになる。
【００１３】
【発明の作用・効果】
請求項１および請求項２に記載の本発明は、上記のように構成したので、偏平チューブ２の平坦面１の外面側に冷却水を略均等に流通させ、熱交換を促進することができる。それと共に、淀みを生じさせることなく、冷却水の沸騰を防止し、長寿命なＥＧＲクーラを提供できる。
しかも、本発明のＥＧＲクーラは多数の膨出部８が互いに離間して配置されているので、冷却水の流通抵抗の上昇を必要最小限に抑えることができる。
また、ケーシング７の内面に流通抵抗減少用の隙間拡大部９を設けることができ、その場合にはさらに均一に冷却水１１を偏平チューブ２の各部に流通させることができる。
【図面の簡単な説明】
【図１】本発明のＥＧＲクーラの一部破断斜視図。
【図２】同ＥＧＲクーラの一部破断平面図。
【図３】本発明のＥＧＲクーラとの比較のためのものであり、その一部を破断した平面図。
【図４】本発明のＥＧＲクーラの他の例を示す平面図。
【図５】図２のＶ−Ｖ矢視断面略図。
【図６】本発明のＥＧＲクーラのさらに他の例を示す平面図。
【図７】図６のＶII−ＶII矢視断面略図。
【符号の説明】
１ 平坦面
１ａ 淀み領域
１ｂ 流通領域
２ 偏平チューブ
３ ヘッダ
３ａ ヘッダプレート
４ コア
５ 側面
６，６ａ 出入口
７ ケーシング
８ 膨出部
９ 隙間拡大部
10 排ガス
11 冷却水[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an EGR cooler that cools exhaust gas in an exhaust gas recirculation device of a vehicle, and in particular, a number of flat tubes are arranged in parallel, exhaust gas is circulated in the flat tubes, and cooling water is circulated on the outer surface side of the flat tubes. In the thing, it is related with what distribute | circulates the cooling water equally to each part of a flat tube.
[0002]
[Prior art]
There is known an EGR cooler in which a large number of flat tubes are arranged in parallel, both ends of each flat tube communicate with a pair of headers to form a core, and the outer periphery of the core is fitted with a casing. Then, high-temperature exhaust gas is circulated in each flat tube, cooling water is circulated on the outer surface side of the flat tube, and heat exchange is performed between both fluids.
In such an EGR cooler, a means in which baffle plates are spaced apart from each other in the longitudinal direction of the flat tube and arranged in a staggered manner is known as means for uniformly circulating cooling water to each part of the flat tube. Then, the cooling water is circulated in a meandering manner by the baffle plate (for example, see Patent Document 1).
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 10-185489
[Problems to be solved by the invention]
The EGR cooler in which a plurality of baffle plates are arranged in a staggered manner has a drawback that the number of parts is increased and the mounting is troublesome.
If such a baffle plate is eliminated, as shown in FIG. 3, there arises a new problem that a stagnation region 1a is generated in each part of the flat tube. That is, when the pair of entrances 6 and 6a are formed at one end and the other end in the longitudinal direction on the opposing planes of the casing 7, and cooling water is circulated from one entrance 6 to the other entrance 6a, the flat tube 2 is flattened. In each part of the surface 1, there are a circulation area 1b where the cooling water 11 is relatively fast and a stagnation area 1a where stagnation tends to occur relatively slowly. Then, boiling of water may occur due to heating of the exhaust gas 10 in this stagnation region 1a. At the same time, there is a drawback that the amount of heat exchange decreases as a whole.
Therefore, an object of the present invention is to provide an EGR cooler that has a simple structure without increasing the number of parts and that can uniformly flow cooling water to each part of the flat tube.
[0005]
[Means for Solving the Problems]
The present invention according to claim 1 has a plurality of elongated flat tubes (2) in which a pair of flat surfaces (1) are formed on the outer periphery in parallel to the major axis direction of the cross section, and the exhaust gas flows inside. A core having a pair of headers (3) in which the flat surfaces (1) of the respective flat tubes (2) are arranged in parallel so as to face each other with a gap, and both ends of each flat tube (2) are fixed through. (4), a casing (7) in which the outer periphery of the core (4) is fitted, and a pair of opposite ends of the casing (7) facing each other in the major axis direction of the cross section of the flat tube (2). And a cooling water inlet / outlet (6) (6a) each having an opening on a side surface (5) of the casing (7) and each opening being disposed near a diagonal position of the casing (7) ,
In an EGR cooler comprising
With respect to the center line of each of the entrances / exits (6) / (6a), the header plate (3a) adjacent to the entrance / exit at a substantially symmetrical position, except for the vicinity of the facing surface of the entrance / exit, and the flat tube (2). On the outer surface of the flat surface, a plurality of bulging portions (8) for inhibiting flow are projected at regular intervals from the vicinity of the entrance / exit to form a pair of first bulging portions,
The pair of the first bulging portion groups is substantially equally divided into a plurality of portions, and the staggered pattern is formed with respect to the first bulging portion group and other adjacent bulging groups at the positions of the respective equal divisions. A plurality of second bulging portion groups protrude from the outer surface of each of the flat tubes (2), and the second bulging portion group is a plurality of the bulging portions similar to the first bulging portion group. An EGR cooler comprising a portion (8) .
[0006]
The present invention according to claim 2 has a plurality of elongated flat tubes (2) in which a pair of flat surfaces (1) are formed on the outer periphery in parallel to the major axis direction of the cross section, and the exhaust gas flows inside. The flat surfaces (1) of the respective flat tubes (2) are juxtaposed so as to face each other with a gap, and the respective flat tubes (2) A pair of headers (3) with both ends fixed through In the major axis direction of the cross section of the flat tube (2) at both ends of the casing (7). In an EGR cooler comprising: a pair of opposing side surfaces (5), and each opening having cooling water outlets (6) and (6a) disposed in the vicinity of diagonal positions of the casing (7). ,
With respect to the center line of each of the entrances / exits (6) / (6a), the header plate (3a) adjacent to the entrance / exit at a substantially symmetrical position, except for the vicinity of the facing surface of the entrance / exit, and the flat tube (2). A bulging portion (8) for inhibiting flow consisting of ridges on the outer surface of the flat surface is formed on the opposite surface side from the vicinity of the entrance and exit to form a pair of first bulging portions,
A pair of the first bulging portions are substantially equally divided into a plurality of portions, and at each boundary position, the first bulging portions and other bulging portions adjacent to each other are staggered. Two bulging portions protrude from the outer surface of each of the flat tubes (2), and the second bulging portion includes the bulging portion (8) similar to the first bulging portion. It is an EGR cooler.
[0007]
According to a third aspect of the present invention, in the first or second aspect,
The side surface having the inlet / outlet (6) (6a), which is wider between the opposite position of the inlet / outlet port and the second bulge portion group or the second bulge portion and the side surface of the casing (7). It is an EGR cooler provided with a gap expansion portion (9) for reducing flow resistance that is recessed in the inner surface side of the side surface of the casing (7) at a position facing the space .
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
1 is a partially broken perspective view of an EGR cooler according to the present invention, FIG. 2 is a partially broken plan view thereof, and FIG. 5 is a schematic cross-sectional view taken along the line VV of FIG.
In this EGR cooler, a plurality of flat tubes 2 are arranged in parallel. Each flat tube 2 has a pair of flat surfaces 1 formed on the outer periphery thereof in parallel with the long axis direction of the cross section, and the flat surfaces 1 of the flat tubes 2 are arranged in parallel so as to face each other with a gap. Then, both ends of each flat tube 2 are penetrated and fixed to the header plate 3 a of the header 3 to constitute the core 4. Further, the casing 7 is fitted with a slight gap on the outer periphery of the core 4.
[0009]
In this example, both ends of the casing 7 are liquid-tightly fixed to the header plate 3a. And the entrances 6 and 6a are provided in each side surface of the longitudinal direction of the casing 7 at the one end and the other end. This example is different from that of FIG. 3 in that a large number of bulging portions 8 are formed in a protruding manner in the flow region 1b except for the stagnation region 1a of the flat tube 2.
Further, as shown in FIG. 1, a recessed gap expanding portion 9 for reducing the flow resistance is formed on the inner surface facing the stagnation region 1 a in FIG. 3.
[0010]
By doing in this way, the cooling water 11 flowing in from one of the entrances and exits 6 sufficiently flows to each stagnation region 1a in FIG. 3 as indicated by the arrows, and there is also cooling water passing through the gaps of the respective bulging portions 8. . As a result, the cooling water 11 flows substantially evenly in each part of the flat surface 1 of the flat tube 2. That is, the stagnation region 1a in FIG. 3 disappears. This prevents boiling of the cooling water that has occurred in the stagnation region of the cooling water.
Moreover, in this example, it forms so that the bulging part 8 of the adjacent flat tube 2 may contact, and the contact part is brazed and fixed.
A gap may be formed between the bulging portions 8 of the adjacent flat tubes 2.
[0011]
Next, FIG. 4 shows a second embodiment of the present invention, and this example is different from that of FIG. 2 only in the shape of the bulging portion 8. The bulging portion 8 in FIG. 2 has a flat circular shape and a trapezoidal cross section. However, the bulging portion 8 in the example of FIG. 4 has an elliptical plane and a trapezoidal cross section. is there.
Also in such a bulging part 8, the cooling water 11 distribute | circulates uniformly to each part of the flat surface 1 of the flat tube 2 similarly to the example of FIG.
[0012]
Next, FIGS. 6 and 7 show a third embodiment of the present invention, and this example is different from that of FIG. 4 in the arrangement direction of the bulging portion 8 whose plane is an ellipse. Then, each bulging part 8 is formed in the width direction of the flat tube 2 outer surface. And it is spaced apart in the longitudinal direction of the flat tube 2 and arranged in a staggered manner.
As a result, the cooling water 11 circulates around the respective bulging portions 8, and therefore circulates in the meandering manner on the outer surface of the flat tube 2.
[0013]
[Operation and effect of the invention]
Since the present invention according to claims 1 and 2 is configured as described above , the cooling water can be made to flow substantially evenly on the outer surface side of the flat surface 1 of the flat tube 2 to promote heat exchange. . At the same time, it is possible to prevent the cooling water from boiling without causing stagnation and to provide a long-life EGR cooler.
In addition, since the EGR cooler according to the present invention has a large number of the bulging portions 8 spaced apart from each other, an increase in the flow resistance of the cooling water can be suppressed to a necessary minimum.
Further, the gap expanding portion 9 for reducing the flow resistance can be provided on the inner surface of the casing 7, and in that case, the cooling water 11 can be circulated through each portion of the flat tube 2 more uniformly.
[Brief description of the drawings]
FIG. 1 is a partially broken perspective view of an EGR cooler of the present invention.
FIG. 2 is a partially broken plan view of the EGR cooler.
FIG. 3 is a plan view for comparison with the EGR cooler of the present invention, with a part thereof broken.
FIG. 4 is a plan view showing another example of the EGR cooler of the present invention.
5 is a schematic cross-sectional view taken along the line VV in FIG. 2;
FIG. 6 is a plan view showing still another example of the EGR cooler of the present invention.
7 is a schematic cross-sectional view taken along the line VII-VII in FIG. 6;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Flat surface 1a Stagnation area | region 1b Distribution area | region 2 Flat tube 3 Header 3a Header plate 4 Core 5 Side surface 6, 6a Entrance / exit 7 Casing 8 Expansion part 9 Gap enlarged part
10 exhaust gas
11 Cooling water

Claims (3)

外周に一対の平坦面（１）がその断面の長軸方向に平行に形成されて内部に排ガスが流通する複数の細長い偏平チューブ（２）を有し、夫々の偏平チューブ（２）の平坦面（１）が隙間を有して互いに対向するように並列され、夫々の偏平チューブ（２）の両端が貫通固定された一対のヘッダ（３）を有するコア（４）と、そのコア（４）の外周が被嵌されるケーシング（７）と、そのケーシング（７）の両端位置で、夫々の前記偏平チューブ（２）の断面の長径方向に対向する一対の側面（５）に開口され且つ、それぞれの開口が前記ケーシング（７）の対角位置の近傍に配置された冷却水の出入口（６）（６ａ）と、
を具備するＥＧＲクーラにおいて、
前記各出入口（６）（６ａ）の中心線に対して、その出入口に隣接するヘッダープレート（３ａ）の略対称位置で、その出入口の対向面近傍を除き、それぞれの前記偏平チューブ（２）の平坦面の外面に複数の流通阻害用の膨出部（８）がその出入口の近傍から偏平チューブ（２）の幅方向へ定間隔に並列して突出されて、一対の第１の膨出部群を形成し、
一対の前記第１の膨出部群間が複数にほぼ等分され、その等分の各境の位置で、第１の膨出部群および隣接する他の膨出群に対して、千鳥状に複数の第２の膨出部群がそれぞれの前記偏平チューブ（２）の外面に突出され、その第２の膨出部群は前記第１の膨出部群と同様に並列された複数の膨出部（８）からなることを特徴とするＥＧＲクーラ。A pair of flat surfaces (1) are formed on the outer periphery in parallel to the major axis direction of the cross section, and have a plurality of elongated flat tubes (2) through which exhaust gas flows, and the flat surfaces of the respective flat tubes (2) A core (4) having a pair of headers (3) in which (1) are arranged in parallel so as to face each other with a gap, and both ends of each flat tube (2) are fixed through, and the core (4) A casing (7) to which the outer periphery of the casing (7) is fitted, and a pair of side faces (5) opposed to each other in the major axis direction of the cross section of the flat tube (2) at both end positions of the casing (7); Cooling water inlet / outlet (6) (6a) , each opening being arranged in the vicinity of the diagonal position of the casing (7) ,
In an EGR cooler comprising
With respect to the center line of each of the entrances / exits (6) / (6a), the header plate (3a) adjacent to the entrance / exit at a substantially symmetrical position, except for the vicinity of the facing surface of the entrance / exit, and the flat tube (2). A plurality of bulging portions (8) for inhibiting flow are projected on the outer surface of the flat surface from the vicinity of the entrance and exit in parallel in the width direction of the flat tube (2) at a constant interval, and a pair of first bulging portions Forming a group,
A pair of the first bulging portion groups are substantially equally divided into a plurality of portions, and at the position of each equal boundary, the first bulging portion group and other adjacent bulging groups are staggered. A plurality of second bulge portions are projected from the outer surface of each of the flat tubes (2), and the second bulge portions are arranged in parallel in the same manner as the first bulge portions. An EGR cooler comprising a bulging portion (8) . 外周に一対の平坦面（１）がその断面の長軸方向に平行に形成されて内部に排ガスが流通する複数の細長い偏平チューブ（２）を有し、夫々の偏平チューブ（２）の平坦面（１）が隙間を有して互いに対向するように並列され、夫々の偏平チューブ（２） の両端が貫通固定された一対のヘッダ（３） を有するコア（４）と、そのコア（４）の外周が被嵌されるケーシング（７）と、そのケーシング（７）の両端位置で、夫々の前記偏平チューブ（２）の断面の長径方向に対向する一対の側面（５）に開口され且つ、それぞれの開口が前記ケーシング（７）の対角位置の近傍に配置された冷却水の出入口（６）（６ａ）と、
を具備するＥＧＲクーラにおいて、
前記各出入口（６）（６ａ）の中心線に対して、その出入口に隣接するヘッダープレート（３ａ）の略対称位置で、その出入口の対向面近傍を除き、それぞれの前記偏平チューブ（２）の平坦面の外面に凸条からなる流通阻害用の膨出部（８）がその出入口の近傍から偏平チューブ（２）の幅方向に形成されて、一対の第１の膨出部を形成し、
一対の前記第１の膨出部間が複数にほぼ等分され、その等分の各境の位置で、第１の膨出部および互いに隣接する他の膨出部に対して、千鳥状に複数の第２の膨出部がそれぞれの前記偏平チューブ（２）の外面に突出され、その第２の膨出部は前記第１の膨出部と同様の膨出部（８）からなることを特徴とするＥＧＲクーラ。 A pair of flat surfaces (1) are formed on the outer periphery in parallel to the major axis direction of the cross section, and have a plurality of elongated flat tubes (2) through which exhaust gas flows, and the flat surfaces of the respective flat tubes (2) (1) are arranged in parallel so as to face each other with a gap, and each flat tube (2) A pair of headers (3) with both ends fixed through In the major axis direction of the cross section of the flat tube (2) at both ends of the casing (7). Cooling water inlets and outlets (6) and (6a) which are opened in a pair of opposing side surfaces (5) and each opening is arranged in the vicinity of the diagonal position of the casing (7),
In an EGR cooler comprising
With respect to the center line of each of the entrances / exits (6) / (6a), the header plate (3a) adjacent to the entrance / exit at a substantially symmetrical position, except for the vicinity of the facing surface of the entrance / exit, and the flat tube (2). A bulging portion (8) for inhibiting flow consisting of ridges on the outer surface of the flat surface is formed in the width direction of the flat tube (2) from the vicinity of the entrance and exit to form a pair of first bulging portions,
The pair of the first bulging portions are substantially equally divided into a plurality of portions, and at the positions of the respective equal boundaries, the first bulging portion and other bulging portions adjacent to each other are staggered. A plurality of second bulges protrude from the outer surface of each of the flat tubes (2), and the second bulges consist of bulges (8) similar to the first bulges. EGR cooler according to claim. 請求項１または請求項２において、
前記出入口（６）（６ａ）を有する側面で、その出入口の対向位置および、第２の膨出部群または第２の膨出部と前記ケーシング（７）の前記側面との間でより広い方の空間に対向する位置で、そのケーシング（７）の前記側面の内面側に凹陥する流通抵抗減少用の隙間拡大部（９）を設けたＥＧＲクーラ。In claim 1 or claim 2,
On the side surface having the entrance (6) (6a) , the wider position between the facing position of the entrance and exit and the second bulge portion group or the second bulge portion and the side surface of the casing (7) The EGR cooler which provided the clearance expansion part (9) for flow resistance reduction recessed in the inner surface side of the said side surface of the casing (7) in the position facing this space .
JP2002346566A 2002-11-28 2002-11-28 EGR cooler Expired - Fee Related JP4164799B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002346566A JP4164799B2 (en) 2002-11-28 2002-11-28 EGR cooler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002346566A JP4164799B2 (en) 2002-11-28 2002-11-28 EGR cooler

Publications (2)

Publication Number Publication Date
JP2004177060A JP2004177060A (en) 2004-06-24
JP4164799B2 true JP4164799B2 (en) 2008-10-15

Family

ID=32707397

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2002346566A Expired - Fee Related JP4164799B2 (en) 2002-11-28 2002-11-28 EGR cooler

Country Status (1)

Country Link
JP (1) JP4164799B2 (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100822526B1 (en) * 2002-01-29 2008-04-16 한라공조주식회사 Heater core
KR100670737B1 (en) 2005-03-02 2007-01-19 모딘코리아 유한회사 Tube of exhaust gas recirculation cooler
KR100686934B1 (en) 2005-03-29 2007-02-26 나라엠앤디(주) A recursion an exhaust gas cooling device again
JP4920382B2 (en) * 2006-11-24 2012-04-18 株式会社ティラド EGR cooler
KR100716449B1 (en) * 2007-01-26 2007-05-10 나라엠앤디(주) Recycle apparatus for exhaust gas and water-cooling type intercooler's dimple plate tube and making method
ES2331218B1 (en) 2007-07-27 2010-09-29 Valeo Termico, S.A. HEAT EXCHANGER FOR GASES, ESPECIALLY OF EXHAUST GASES OF AN ENGINE.
JP5001752B2 (en) * 2007-08-28 2012-08-15 愛三工業株式会社 EGR cooler bypass switching system
JP4938610B2 (en) * 2007-10-05 2012-05-23 東京ラヂエーター製造株式会社 EGR cooler
JP5128908B2 (en) * 2007-11-05 2013-01-23 東京ラヂエーター製造株式会社 EGR cooler
JP5510027B2 (en) * 2010-04-21 2014-06-04 トヨタ自動車株式会社 EGR cooler
JP5763462B2 (en) * 2011-07-29 2015-08-12 株式会社ティラド Header plateless heat exchanger
US9217610B2 (en) * 2012-07-16 2015-12-22 Caterpillar Inc. Heat exchanger for exhaust gas recirculation
JP6116951B2 (en) * 2013-03-19 2017-04-19 株式会社ティラド Header plateless heat exchanger
DE102013216408A1 (en) * 2013-08-19 2015-02-19 Behr Gmbh & Co. Kg Heat exchanger
JP6341530B2 (en) * 2013-11-01 2018-06-13 臼井国際産業株式会社 Multi-tube heat exchanger
JP6302395B2 (en) * 2014-03-27 2018-03-28 株式会社ティラド Header plateless heat exchanger
JP6764734B2 (en) * 2016-09-07 2020-10-07 株式会社Ｉｈｉプラント Heat exchanger
WO2018230741A1 (en) * 2017-06-12 2018-12-20 株式会社ティラド Heat exchanger
ES2765014A1 (en) * 2018-12-05 2020-06-05 Valeo Termico Sa HEAT EXCHANGER FOR GASES, ESPECIALLY FOR EXHAUST GASES FROM AN ENGINE (Machine-translation by Google Translate, not legally binding)
JPWO2023042919A1 (en) * 2021-09-17 2023-03-23

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3028452B2 (en) * 1993-11-05 2000-04-04 株式会社ゼクセル Tube element for stacked heat exchanger
JPH10331725A (en) * 1997-05-29 1998-12-15 Calsonic Corp Egr gas cooling device
JP2001304787A (en) * 2000-02-18 2001-10-31 Denso Corp Exhaust heat exchanger
JP2001330394A (en) * 2000-05-22 2001-11-30 Denso Corp Exhaust gas heat exchanger
JP4622150B2 (en) * 2001-04-26 2011-02-02 株式会社デンソー Heat exchanger

Also Published As

Publication number Publication date
JP2004177060A (en) 2004-06-24

Similar Documents

Publication Publication Date Title
JP4164799B2 (en) EGR cooler
KR100679002B1 (en) Gas cooling device
JP5193310B2 (en) Recirculation exhaust gas cooler for internal combustion engines
JP4175340B2 (en) Heat exchanger
WO2014104576A1 (en) Pin-tube type heat exchanger
EP3415854A1 (en) Plate-type heat exchanger and heat-pump-type heating and hot-water supply system equipped with same
US20050082049A1 (en) Plate heat exchanger
JP4683111B2 (en) Exhaust heat exchanger
JP2007510122A (en) Heat exchanger flow passage and heat exchanger having such a flow passage
JP2006207887A (en) Heat exchanger
JP6766076B2 (en) Flat tube laminated exhaust gas heat exchanger
JP5921413B2 (en) Tube for heat exchanger
JP4536237B2 (en) Heat exchanger
US4434846A (en) Patterned heat exchanger fin
JPH1113551A (en) Egr cooler
JP6550177B1 (en) Heat exchanger
JP2019015200A (en) Intercooler
JPH08327270A (en) Fin-tube heat exchanger
JP6104107B2 (en) Heat exchanger
US8245767B2 (en) Heat transmission unit for an internal combustion engine
KR20170122663A (en) Flat tube for a heat exchanger
JPH0650675A (en) Heat exchanger
JP2016200071A (en) EGR gas cooler
WO2022210035A1 (en) Egr cooler
WO2023042919A1 (en) Heat exchanger

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20051007

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20080205

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20080407

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20080715

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20080717

R150 Certificate of patent or registration of utility model

Ref document number: 4164799

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110808

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140808

Year of fee payment: 6

LAPS Cancellation because of no payment of annual fees