JP4207196B2 - Heat exchanger - Google Patents

Heat exchanger Download PDF

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Publication number
JP4207196B2
JP4207196B2 JP2003145967A JP2003145967A JP4207196B2 JP 4207196 B2 JP4207196 B2 JP 4207196B2 JP 2003145967 A JP2003145967 A JP 2003145967A JP 2003145967 A JP2003145967 A JP 2003145967A JP 4207196 B2 JP4207196 B2 JP 4207196B2
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Prior art keywords
tube
axis
tubes
heat exchanger
parallel
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JP2004347252A (en
Inventor
浩 斉藤
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T.RAD CO., L T D.
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T.RAD CO., L T D.
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Priority to US10/526,331 priority Critical patent/US7171956B2/en
Application filed by T.RAD CO., L T D. filed Critical T.RAD CO., L T D.
Priority to JP2003145967A priority patent/JP4207196B2/en
Priority to EP03791188A priority patent/EP1548386B1/en
Priority to PCT/JP2003/009775 priority patent/WO2004020928A1/en
Priority to DE60332369T priority patent/DE60332369D1/en
Priority to CNB038234653A priority patent/CN100404995C/en
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    • 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

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  • Exhaust-Gas Circulating Devices (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、排ガス等のガス体を冷却水によって冷却する、いわゆる、シェル＆チューブ型の熱交換器およびそれに用いるチューブに関する。
【０００２】
【従来の技術】
シェル＆チューブ型の排ガス冷却用熱交換器は、軸線が直線状の多数のチューブを並列させ、夫々のチューブの両端をヘッダプレートに貫通させてコアを形成し、そのコアの外周にケーシングを被嵌すると共に、ヘッダプレートの周縁にヘッダ本体を取付けたものである。そして一方のヘッダから各チューブ内に排ガスを供給して、他方のヘッダへそれを流通させると共に、ケーシング内に冷却水を流通させて両流体間に熱交換を行うものであった。
【０００３】
【発明が解決しようとする課題】
軸線が直線状のチューブは、その軸線が波形に曲折されたチューブに比べて排ガスの攪拌性能および放熱面積が小さい欠点がある。しかしながら、排ガス用の熱交換器においてチューブの軸線が波形になるようにチューブ全体を曲折すると、その凹部に凝縮液が溜まりチューブが急速に腐蝕されるおそれがある。
さらには、波形のチューブを用いて熱交換器を量産する場合、夫々のチューブの波が同期するように正確に並列させる必要があり、熱交換器の組立てが極めて面倒である。
そこで本発明は、これらの問題点を解決することを課題とする。
【０００４】
【課題を解決するための手段】
請求項１に記載の本発明は、並列された多数のチューブ（１）と、夫々のチューブ（１）の両端が挿通されるヘッダープレート（２）とを具備し、
チューブ（１）内に被冷却用のガス体が流通し、チューブの外面に冷却流体が流通して、両流体間に熱交換を行なうことにより、チューブ（１）内に凝縮液が発生する熱交換器において、
夫々のチューブ（１）が一平面方向のみにその軸線が波形に曲折形成され且つ、夫々のチューブの曲折方向の平面が互いに平行に並列され、
夫々のチューブの曲折方向の平面が水平面に対して同一角度θに傾斜して配置され、
夫々の前記チューブ（１）は、その断面が円形に形成されると共に、その軸線が同一形状の波形に曲折され、
且つ、その波の互いに離れた二つの頂部（１ａ）の下面を、その軸線に直交する板材（３）で支持したとき、夫々のチューブ（１）はその重力により軸線の回りに特定方向で安定するように、チューブ全体の重力バランスを有するものを用いたことを特徴とする熱交換器である。
【０００６】
請求項２に記載の本発明は、並列された多数のチューブ（１）と、夫々のチューブ（１）の両端が挿通されるヘッダープレート（２）とを具備し、
チューブ（１）内に被冷却用のガス体が流通し、チューブの外面に冷却流体が流通して、両流体間に熱交換を行なうことにより、チューブ（１）内に凝縮液が発生する熱交換器において、
夫々のチューブ（１）が一平面方向のみにその軸線が波形に曲折形成され且つ、夫々のチューブの曲折方向の平面が互いに平行に並列され、
夫々のチューブの曲折方向の平面が水平面に対して同一角度θに傾斜して配置され、
夫々の前記チューブ（１）は、その断面が円形に形成されると共に、その軸線が同一形状の波形に曲折され、
且つ、その波の互いに離れた少なくとも二つの頂部（１ａ）におけるチューブ断面の下面側が、Ｖ字状または逆ハの字状に形成されたチューブ支持用の支持部（１ｂ）を有するものを用いたことを特徴とする熱交換器である。
【０００７】
【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は本発明の熱交換器に用いられるチューブ１を下面側から支持した状態の正面図であり、図２は図１のII−II矢視断面図である。また、図３は同熱交換器のチューブ１とヘッダープレート２との組立て過程を示す説明図であり、図４は同熱交換器であって図５のIV−IV矢視図であり、図５は同熱交換器の縦断面略図である。さらに、図６は図５のVI−VI矢視断面略図である。
【０００８】
この例は、ＥＧＲクーラとして用いられる熱交換器であって、ガス体６として排ガスが一方のヘッダから夫々のチューブ１を流通して他方のヘッダに導かれ、冷却流体７として冷却水が、一方の冷却水パイプ12からケーシング４内に流入し、それが各チューブ１の外周を流通して他方の冷却水パイプ12から流出する。そしてガス体６と冷却流体７との間で熱交換が行われものである。この熱交換器に用いられるチューブ１は、図１，図２，図６に示す如く、その軸線が波形に曲折形成されたものである。その波の曲折方向は、図５及び図６から明らかなように、全てのチューブ１において一平面上に平行に曲折されている。これは、図６の如く全てのチューブ１の波の波長を同期して配置させ、各チューブ間の隙間を均一にして各部における熱交換器を促進させるためである。
【０００９】
各チューブ１は図１に示す如く、波の軸線Ｌ2 の中心線Ｌ0 よりもチューブ１の両端部における軸線Ｌ1 が図において下方に位置されている。これは、Ｌ1 とＬ0 とが同一線上に存在すると、チューブ１を一対の板材３上に載置したとき、その向きがランダムに位置されることを避けるものである。即ち、チューブ１を一対の板材３で図１の如く支持した場合、Ｌ1 がＬ0 より下方に位置した場合、チューブ１の位置エネルギーは最も安定した低い位置にある。そのため図１の向きで安定し、不用意にそれが回転することがない。仮に、Ｌ1 がＬ0 より上位にあると全体として位置エネルギーが高くなり、重力の影響を受けてより低い方に移動し図１の状態に安定する。そして、多数のチューブ１を板材３上に、図２の如く、向きを同一にして並列することができる。
【００１０】
このように並列することにより、その向きを一致させて図３の如くヘッダープレート２のチューブ挿通孔に夫々のチューブ１を並列させることができる。即ち、この例では夫々のチューブ１の波の曲折方向を上下方向に位置して全てのチューブ１を並列させることができる。次いで、その組立体全体を９０°回転させ図４〜図６の如く軸線の曲折平面を水平に位置させ、さらに全体を水平面10に対してθ傾けることにより、各チューブ１の内面に生じる凝縮液を円滑に下方に流下させ、チューブ１の内部にそれが溜まることを防止する。
【００１１】
次に、図７はチューブ１の他の実施の形態を示し、この例が図１のそれと異なる点は、板材３の支持点においてそのチューブ１の横断面がＶ字状または逆ハの字状に形成され、それに整合するように板材３の上縁に多数の支持用Ｖ字凹部３ｂが互いに離間して形成されたものである。この場合にも、並列される全てのチューブ１の向きを支持部１ｂと支持用Ｖ字凹部３ｂとの嵌着により同一方向に向けることができる。
【００１２】
【発明の作用・効果】
本発明の熱交換器は、チューブ１内に凝縮液が発生する熱交換器において、夫々のチューブが一平面方向のみに波形に曲折され且つ、その曲折方向の平面が互いに平行に並列されると共に、その曲折方向の平面が水平面に対して同一角度θに傾斜して配置されるから、チューブ１内の凝縮液を傾斜方向下方に円滑に流下させることができる。そのため、凝縮液がチューブ１内に滞留してチューブ１を腐蝕させるおそれがなく、耐久性の高い熱交換器を提供できる。
しかも、チューブ１は夫々軸線が波形に曲折形成されているため、チューブ１内を流通するガス体を攪拌すると共に、伝熱面積が広くなり冷却流体との熱交換を促進し得る。
【００１３】
さらに、その熱交換器に用いるチューブ１は、夫々断面が円形に形成されると共に、その軸線が同一形状の波形に形成され且つ、チューブ全体の重力バランスが、それを一対の板材３で支持したとき、夫々のチューブがその重力で軸線周りに特定方向に安定するように形成されたから、一対の板材３上に多数のチューブ１を配置したとき、同一方向に並列させることができる。
即ち、チューブは、軸線の周りの勝手な方向を向くことなく、板材３上で並列され、それを用いることにより、熱交換器組立ての際に、夫々の曲折平面を同一に維持して容易に組み立てることができ、熱交換器の量産性を有する共に、その曲折方向の平面を正確に互いに平行に並列し、熱交換性能を向上しえる。
【００１４】
また、請求項２に記載の熱交換器は、それに用いるチューブとして、その波の互いに離れた少なくとも二つの頂部１ａにおけるチューブ断面の下面側がＶ字状または逆ハの字状に形成され、そこにチューブ支持用の支持部１ｂを有するものを使用したので、その支持部１ｂに整合する支持用Ｖ字凹部３ｂを有する板材３によって、多数のチューブ１をその曲折平面を同一に維持して多数並列させることができる。
それにより、熱交換器の組立てを容易にし、熱交換器の量産性を有する共に、その曲折方向の平面を正確に互いに平行に並列し、熱交換性能を向上しえる。
【図面の簡単な説明】
【図１】本発明の熱交換器に用いられるチューブ１を下面から支持した正面図。
【図２】図１のII−II矢視断面図。
【図３】同熱交換器におけるチューブ１とヘッダープレート２との組立て状態を示す側面図。
【図４】図５のIV−IV矢視図。
【図５】本発明の熱交換器の縦断面略図。
【図６】図５のVI−VI矢視図。
【図７】本発明の熱交換器に用いられる他の例のチューブ１を下面から支持した正面図。
【図８】図７のVIII−VIII矢視断面図。
【符号の説明】
１ チューブ
１ａ 頂部
１ｂ 支持部
２ ヘッダープレート
３ 板材
３ａ 支持用凹部
３ｂ 支持用Ｖ字凹部
４ ケーシング
６ ガス体
７ 冷却流体
８ ヘッダ本体
９ 支持台
10 水平面
11 ガス用パイプ
12 冷却水パイプ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a so-called shell and tube type heat exchanger for cooling a gas body such as exhaust gas with cooling water and a tube used therefor.
[0002]
[Prior art]
A shell-and-tube type heat exchanger for exhaust gas cooling has a large number of tubes with straight axes arranged in parallel, a core is formed by penetrating both ends of each tube through a header plate, and a casing is covered on the outer periphery of the core. The header body is attached to the periphery of the header plate. And exhaust gas was supplied in each tube from one header, and it was distribute | circulated to the other header, and also the cooling water was distribute | circulated in the casing and heat exchange was performed between both fluids.
[0003]
[Problems to be solved by the invention]
A tube having a straight axis has a drawback that the stirring performance of the exhaust gas and the heat radiation area are small compared to a tube whose axis is bent in a waveform. However, if the entire tube is bent so that the axis of the tube in the heat exchanger for exhaust gas is corrugated, condensate may accumulate in the recess and the tube may be rapidly corroded.
Furthermore, when mass-producing heat exchangers using corrugated tubes, it is necessary to accurately parallel the tubes so that the waves of the respective tubes are synchronized, and the assembly of the heat exchanger is extremely troublesome.
Therefore, the present invention has an object to solve these problems.
[0004]
[Means for Solving the Problems]
The present invention according to claim 1 comprises a plurality of tubes (1) arranged in parallel, and a header plate (2) through which both ends of each tube (1) are inserted,
The heat generated by the condensate in the tube (1) is obtained by circulating a gas body to be cooled in the tube (1), circulating a cooling fluid on the outer surface of the tube, and exchanging heat between the two fluids. In the exchanger
Each tube (1) has its axis bent in a waveform in only one plane direction, and the planes in the bending direction of each tube are parallel to each other,
The plane of the bending direction of each tube is arranged to be inclined at the same angle θ with respect to the horizontal plane ,
Each of the tubes (1) has a circular cross section, and its axis is bent into the same waveform.
In addition, when the bottom surfaces of the two top portions (1a) that are separated from each other of the wave are supported by a plate (3) that is orthogonal to the axis, each tube (1) is stabilized in a specific direction around the axis due to its gravity. Thus, the heat exchanger is characterized in that a tube having a gravity balance of the entire tube is used .
[0006]
The present invention according to claim 2 comprises a plurality of tubes (1) arranged in parallel and a header plate (2) through which both ends of each tube (1) are inserted,
The heat generated by the condensate in the tube (1) is obtained by circulating a gas body to be cooled in the tube (1), circulating a cooling fluid on the outer surface of the tube, and exchanging heat between the two fluids. In the exchanger
Each tube (1) has its axis bent in a waveform in only one plane direction, and the planes in the bending direction of each tube are parallel to each other,
The plane of the bending direction of each tube is arranged to be inclined at the same angle θ with respect to the horizontal plane,
Each of the tubes (1) has a circular cross section, and its axis is bent into the same waveform.
In addition, the tube having a support portion (1b) for supporting the tube formed on the lower surface side of the tube cross section at the two top portions (1a) separated from each other in a V shape or an inverted C shape was used. It is a heat exchanger characterized by this.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a front view of a state in which a tube 1 used in the heat exchanger of the present invention is supported from the lower surface side, and FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 3 is an explanatory view showing an assembly process of the tube 1 and the header plate 2 of the heat exchanger, and FIG. 4 is a view of the heat exchanger taken along arrows IV-IV in FIG. 5 is a schematic longitudinal sectional view of the heat exchanger. 6 is a schematic cross-sectional view taken along the line VI-VI in FIG.
[0008]
This example is a heat exchanger used as an EGR cooler, in which exhaust gas as a gas body 6 flows from one header through each tube 1 and is guided to the other header, and cooling water is used as a cooling fluid 7. The cooling water pipe 12 flows into the casing 4, flows through the outer periphery of each tube 1, and flows out from the other cooling water pipe 12. Heat exchange is performed between the gas body 6 and the cooling fluid 7. As shown in FIGS. 1, 2, and 6, the tube 1 used in this heat exchanger has its axis bent into a waveform. As is clear from FIGS. 5 and 6, the bending direction of the wave is bent in parallel on one plane in all the tubes 1. This is because the wave wavelengths of all the tubes 1 are arranged synchronously as shown in FIG. 6 so that the gaps between the tubes are made uniform and the heat exchangers in each part are promoted.
[0009]
Each tube 1 as shown in FIG. 1, the axis L 1 is positioned downward in FIG at both ends of the tube 1 from the center line L 0 of the axis L 2 of the waves. This is to prevent L 1 and L 0 from being randomly positioned when the tube 1 is placed on the pair of plate members 3 if they exist on the same line. That is, when the tube 1 is supported by a pair of plate members 3 as shown in FIG. 1, when L 1 is positioned below L 0, the potential energy of the tube 1 is at the lowest stable position. Therefore, it is stable in the direction of FIG. 1, and it does not rotate carelessly. If L 1 is higher than L 0, the potential energy as a whole becomes higher, moves to a lower position under the influence of gravity, and stabilizes in the state shown in FIG. A large number of tubes 1 can be arranged on the plate 3 in parallel with the same orientation as shown in FIG.
[0010]
By arranging in parallel in this way, the tubes 1 can be arranged in parallel in the tube insertion holes of the header plate 2 as shown in FIG. That is, in this example, all the tubes 1 can be juxtaposed with the wave bending direction of each tube 1 positioned in the vertical direction. Next, the entire assembly is rotated by 90 ° so that the bent plane of the axis is positioned horizontally as shown in FIGS. 4 to 6, and the whole is inclined by θ with respect to the horizontal plane 10, thereby generating condensate generated on the inner surface of each tube 1. Is smoothly flowed downward to prevent it from accumulating inside the tube 1.
[0011]
Next, FIG. 7 shows another embodiment of the tube 1, and this example is different from that of FIG. 1 in that the cross section of the tube 1 is V-shaped or reverse-shaped at the support point of the plate 3. A large number of supporting V-shaped recesses 3b are formed on the upper edge of the plate 3 so as to be aligned with each other. Also in this case, all the tubes 1 arranged in parallel can be directed in the same direction by fitting the supporting portion 1b and the supporting V-shaped recess 3b.
[0012]
[Operation and effect of the invention]
The heat exchanger of the present invention is a heat exchanger in which condensate is generated in the tube 1, and each tube is bent into a waveform in only one plane direction, and the planes in the bending direction are parallel to each other. Since the bent plane is inclined at the same angle θ with respect to the horizontal plane, the condensate in the tube 1 can flow smoothly downward in the inclined direction. Therefore, there is no possibility that the condensate stays in the tube 1 and corrodes the tube 1, and a highly durable heat exchanger can be provided.
Moreover, since the tubes 1 each have an axis bent in a waveform, the gas body flowing in the tube 1 is agitated, and the heat transfer area is widened to facilitate heat exchange with the cooling fluid.
[0013]
Furthermore, the tubes 1 used in the heat exchanger are each formed in a circular cross section, and the axis is formed in a waveform having the same shape, and the gravity balance of the whole tube supports it with a pair of plate members 3. Since each tube is formed so as to be stabilized in a specific direction around the axis due to its gravity, when a large number of tubes 1 are arranged on the pair of plate members 3, they can be arranged in parallel in the same direction.
That is, the tubes are arranged in parallel on the plate material 3 without facing the arbitrary direction around the axis, and by using them , it is easy to maintain the same bending plane when assembling the heat exchanger. The heat exchanger can be assembled and has mass productivity of the heat exchanger, and the planes in the bending direction can be accurately arranged in parallel with each other to improve the heat exchange performance .
[0014]
Further, in the heat exchanger according to claim 2, as a tube used therefor, the lower surface side of the tube cross section at at least two top portions 1a of the wave separated from each other is formed in a V shape or an inverted C shape, Since the one having the support portion 1b for supporting the tube is used, the plate 3 having the support V-shaped recess 3b aligned with the support portion 1b is used to keep a large number of tubes 1 in parallel while maintaining the same bending plane. Can be made.
Thereby, the assembly of the heat exchanger is facilitated, the heat exchanger is mass-produced, and the planes in the bending direction are accurately arranged in parallel with each other, so that the heat exchange performance can be improved .
[Brief description of the drawings]
FIG. 1 is a front view of a tube 1 used in a heat exchanger according to the present invention supported from below.
FIG. 2 is a cross-sectional view taken along the line II-II in FIG.
FIG. 3 is a side view showing an assembled state of the tube 1 and the header plate 2 in the heat exchanger.
4 is a view taken along arrow IV-IV in FIG. 5;
FIG. 5 is a schematic vertical sectional view of a heat exchanger according to the present invention.
6 is a view taken along arrow VI-VI in FIG. 5;
FIG. 7 is a front view of another example of the tube 1 used in the heat exchanger of the present invention supported from the lower surface.
8 is a cross-sectional view taken along arrow VIII-VIII in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Tube 1a Top part 1b Support part 2 Header plate 3 Plate | board material 3a Support recessed part 3b Support V-shaped recessed part 4 Casing 6 Gas body 7 Cooling fluid 8 Header main body 9 Support stand
10 horizontal plane
11 Gas pipe
12 Cooling water pipe

Claims (2)

並列された多数のチューブ（１）と、夫々のチューブ（１）の両端が挿通されるヘッダープレート（２）とを具備し、
チューブ（１）内に被冷却用のガス体が流通し、チューブの外面に冷却流体が流通して、両流体間に熱交換を行なうことにより、チューブ（１）内に凝縮液が発生する熱交換器において、
夫々のチューブ（１）が一平面方向のみにその軸線が波形に曲折形成され且つ、夫々のチューブの曲折方向の平面が互いに平行に並列され、
夫々のチューブの曲折方向の平面が水平面に対して同一角度θに傾斜して配置され、
夫々の前記チューブ（１）は、その断面が円形に形成されると共に、その軸線が同一形状の波形に曲折され、
且つ、その波の互いに離れた二つの頂部（１ａ）の下面を、その軸線に直交する板材（３）で支持したとき、夫々のチューブ（１）はその重力により軸線の回りに特定方向で安定するように、チューブ全体の重力バランスを有するものを用いたことを特徴とする熱交換器。A plurality of tubes (1) arranged in parallel, and a header plate (2) through which both ends of each tube (1) are inserted,
The heat generated by the condensate in the tube (1) is obtained by circulating a gas body to be cooled in the tube (1), circulating a cooling fluid on the outer surface of the tube, and exchanging heat between the two fluids. In the exchanger
Each tube (1) has its axis bent in a waveform in only one plane direction, and the planes in the bending direction of each tube are parallel to each other,
The plane of the bending direction of each tube is arranged to be inclined at the same angle θ with respect to the horizontal plane,
Each of the tubes (1) has a circular cross section, and its axis is bent into the same waveform.
In addition, when the bottom surfaces of the two top portions (1a) that are separated from each other of the wave are supported by a plate (3) that is orthogonal to the axis, each tube (1) is stabilized in a specific direction around the axis due to its gravity. A heat exchanger having a gravity balance of the entire tube is used . 並列された多数のチューブ（１）と、夫々のチューブ（１）の両端が挿通されるヘッダープレート（２）とを具備し、
チューブ（１）内に被冷却用のガス体が流通し、チューブの外面に冷却流体が流通して、両流体間に熱交換を行なうことにより、チューブ（１）内に凝縮液が発生する熱交換器において、
夫々のチューブ（１）が一平面方向のみにその軸線が波形に曲折形成され且つ、夫々のチューブの曲折方向の平面が互いに平行に並列され、
夫々のチューブの曲折方向の平面が水平面に対して同一角度θに傾斜して配置され、
夫々の前記チューブ（１）は、その断面が円形に形成されると共に、その軸線が同一形状の波形に曲折され、
且つ、その波の互いに離れた少なくとも二つの頂部（１ａ）におけるチューブ断面の下面側が、Ｖ字状または逆ハの字状に形成されたチューブ支持用の支持部（１ｂ）を有するものを用いたことを特徴とする熱交換器。 A plurality of tubes (1) arranged in parallel, and a header plate (2) through which both ends of each tube (1) are inserted,
The heat generated by the condensate in the tube (1) is obtained by circulating a gas body to be cooled in the tube (1), circulating a cooling fluid on the outer surface of the tube, and exchanging heat between the two fluids. In the exchanger
Each tube (1) has its axis bent in a waveform in only one plane direction, and the planes in the bending direction of each tube are parallel to each other,
The plane of the bending direction of each tube is arranged to be inclined at the same angle θ with respect to the horizontal plane,
Each of the tubes (1) has a circular cross section, and its axis is bent into the same waveform.
In addition, the tube having a support portion (1b) for supporting the tube formed on the lower surface side of the tube cross section at the two top portions (1a) separated from each other in a V shape or an inverted C shape was used. A heat exchanger characterized by that .
JP2003145967A 2002-08-28 2003-05-23 Heat exchanger Expired - Fee Related JP4207196B2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US10/526,331 US7171956B2 (en) 2002-08-28 2002-07-31 EGR cooler
JP2003145967A JP4207196B2 (en) 2003-05-23 2003-05-23 Heat exchanger
EP03791188A EP1548386B1 (en) 2002-08-28 2003-07-31 Egr cooler
PCT/JP2003/009775 WO2004020928A1 (en) 2002-08-28 2003-07-31 Egr cooler
DE60332369T DE60332369D1 (en) 2002-08-28 2003-07-31 EGR COOLER
CNB038234653A CN100404995C (en) 2002-08-28 2003-07-31 EGR cooler

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DE102005046536A1 (en) * 2005-09-28 2007-03-29 Witzenmann Gmbh Heat exchanger for exhaust gas recirculation line, has hose line extending concentrically to casing line, and spacing units arranged in outer flow area between casing line and hose line, where hose line has annular wave-shaped corrugation
JP5519213B2 (en) * 2009-08-19 2014-06-11 株式会社前川製作所 Ice making equipment
JP5168414B2 (en) 2010-09-27 2013-03-21 トヨタ自動車株式会社 cylinder head
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