JP2005036765A - Egr cooler - Google Patents

Egr cooler Download PDF

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Publication number
JP2005036765A
JP2005036765A JP2003276680A JP2003276680A JP2005036765A JP 2005036765 A JP2005036765 A JP 2005036765A JP 2003276680 A JP2003276680 A JP 2003276680A JP 2003276680 A JP2003276680 A JP 2003276680A JP 2005036765 A JP2005036765 A JP 2005036765A
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JP
Japan
Prior art keywords
cooling water
shell
egr cooler
supply chamber
inlet pipe
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.)
Pending
Application number
JP2003276680A
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Japanese (ja)
Inventor
Hiroyuki Sugihara
啓之 杉原
Makoto Tsujita
誠 辻田
Yoji Yamashita
洋二 山下
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.)
Hino Motors Ltd
Denso Sankyo Co Ltd
Original Assignee
Hino Motors Ltd
Sankyo Radiator Co Ltd
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 Hino Motors Ltd, Sankyo Radiator Co Ltd filed Critical Hino Motors Ltd
Priority to JP2003276680A priority Critical patent/JP2005036765A/en
Priority to EP04747406A priority patent/EP1647697A1/en
Priority to US10/564,160 priority patent/US20060201661A1/en
Priority to KR1020067000850A priority patent/KR20060063885A/en
Priority to PCT/JP2004/009940 priority patent/WO2005008055A1/en
Priority to CNA2004800207459A priority patent/CN1826461A/en
Publication of JP2005036765A publication Critical patent/JP2005036765A/en
Pending legal-status Critical Current

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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
    • F28F9/22—Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • F28D7/1607—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation with particular pattern of flow of the heat exchange media, e.g. change of flow direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
    • F02M26/32—Liquid-cooled heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • 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
    • 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
    • F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
    • F28F9/0263—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits by varying the geometry or cross-section of header box
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001—Recuperative heat exchangers
    • F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
    • 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
    • F28F2009/0285—Other particular headers or end plates
    • F28F2009/029—Other particular headers or end plates with increasing or decreasing cross-section, e.g. having conical shape

Abstract

<P>PROBLEM TO BE SOLVED: To prevent stagnation of cooling water without restricting the mounted attitude of an EGR cooler to a vehicle. <P>SOLUTION: This EGR cooler is provided with tubes 3 and a shell 1 surrounding the tubes 3, and constituted to supply and discharge cooling water 9 into and out of the shell 1 and to allow exhaust gas to pass through the inside of the tubes 3 to exchange heat between the exhaust gas and cooling water 9. An annular cooling water supply chamber 11 is externally fitted and mounted near one end in the axial direction of the shell 1, and a cooling water inlet pipe 4 is connected to a suitable position in the circumferential direction of the cooling water supply chamber 11. A plurality of circumferential parts of a portion covered with the cooling water supply chamber 11 of the shell 1 are provided with communicating holes 12 bored to gradually reduce the bores as they go away in the circumferential direction from the connected part of the cooling water inlet pipe 4, and the cooling water 9 is led into the shell 1 almost equally from the respective communicating holes 12. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、エンジンの排気ガスを再循環して窒素酸化物の発生を低減させるＥＧＲ装置に付属されて再循環用排気ガスを冷却するＥＧＲクーラに関するものである。   The present invention relates to an EGR cooler attached to an EGR device that recirculates engine exhaust gas to reduce generation of nitrogen oxides and cools the recirculation exhaust gas.

従来より自動車等のエンジンの排気ガスの一部をエンジンに再循環して窒素酸化物の発生を低減させるＥＧＲ装置が知られているが、このようなＥＧＲ装置では、エンジンに再循環する排気ガスを冷却すると、該排気ガスの温度が下がり且つその容積が小さくなることによって、エンジンの出力を余り低下させずに燃焼温度を低下して効果的に窒素酸化物の発生を低減させることができる為、エンジンに排気ガスを再循環するラインの途中に、排気ガスを冷却するＥＧＲクーラを装備したものがある。   Conventionally, an EGR device that reduces the generation of nitrogen oxides by recirculating a part of exhaust gas of an engine such as an automobile to the engine is known. In such an EGR device, the exhaust gas recirculated to the engine is known. When the engine is cooled, the temperature of the exhaust gas is reduced and the volume of the exhaust gas is reduced, so that the combustion temperature can be lowered and the generation of nitrogen oxides can be effectively reduced without significantly reducing the output of the engine. Some engines are equipped with an EGR cooler for cooling the exhaust gas in the middle of the line for recirculating the exhaust gas to the engine.

図５は前記ＥＧＲクーラの一例を示す断面図であって、図中１は円筒状に形成されたシェルを示し、該シェル１の軸心方向両端には、シェル１の端面を閉塞するようプレート２，２が固着されていて、該各プレート２，２には、多数のチューブ３の両端が貫通状態で固着されており、これら多数のチューブ３はシェル１の内部を軸心方向に延びている。   FIG. 5 is a cross-sectional view showing an example of the EGR cooler. In FIG. 5, reference numeral 1 denotes a shell formed in a cylindrical shape, and a plate is provided at both ends in the axial center direction of the shell 1 so as to close the end face of the shell 1. 2 and 2 are fixed, and both ends of a large number of tubes 3 are fixed to the respective plates 2 and 2 in a penetrating state. The large numbers of tubes 3 extend in the axial direction inside the shell 1. Yes.

そして、シェル１の一方の端部近傍には冷却水入口管４が取り付けられ、シェル１の他方の端部近傍には冷却水出口管５が取り付けられており、冷却水９が冷却水入口管４からシェル１の内部に供給されてチューブ３の外側を流れ、冷却水出口管５からシェル１の外部に排出されるようになっている。   A cooling water inlet pipe 4 is attached in the vicinity of one end of the shell 1, a cooling water outlet pipe 5 is attached in the vicinity of the other end of the shell 1, and the cooling water 9 is supplied to the cooling water inlet pipe. 4 is supplied to the inside of the shell 1, flows outside the tube 3, and is discharged from the cooling water outlet pipe 5 to the outside of the shell 1.

更に、各プレート２，２の反シェル１側には、椀状に形成されたボンネット６，６が前記各プレート２，２の端面を被包するように固着され、一方のボンネット６の中央には排気ガス入口７が、他方のボンネット６の中央には排気ガス出口８が夫々設けられており、エンジンの排気ガス１０が排気ガス入口７から一方のボンネット６の内部に入り、多数のチューブ３を通る間に該チューブ３の外側を流れる冷却水９との熱交換により冷却された後に、他方のボンネット６の内部に排出されて排気ガス出口８からエンジンに再循環するようになっている。   Further, bonnets 6, 6 formed in a bowl shape are fixed to the opposite shell 1 side of each plate 2, 2 so as to enclose the end faces of the respective plates 2, 2, and in the center of one bonnet 6. Is provided with an exhaust gas inlet 7 and an exhaust gas outlet 8 at the center of the other bonnet 6. The exhaust gas 10 of the engine enters the inside of one bonnet 6 from the exhaust gas inlet 7, and a plurality of tubes 3. After being cooled by heat exchange with the cooling water 9 flowing outside the tube 3, it is discharged into the other bonnet 6 and recirculated from the exhaust gas outlet 8 to the engine.

斯かる従来のＥＧＲクーラにおいては、冷却水入口管４からシェル１の内部に流入した後、冷却水出口管５に対し最短距離で斜めに向かう流れが形成され易く、単に冷却水入口管４と冷却水出口管５を設けるだけでは、シェル１内における冷却水入口管４に対峙する側の隅部近傍に冷却水９の澱みが形成されてしまうため、冷却水入口管４に対し直径方向に対峙する位置にバイパス出口管５ａを設け、ここから冷却水９の一部を抜き出すことにより前記冷却水９の澱みの形成を防ぎ、この部分で熱交換効率が低下してチューブ３が局部的に熱変形を起こす虞れを未然に回避し得るようにしている。   In such a conventional EGR cooler, after flowing into the shell 1 from the cooling water inlet pipe 4, a flow that is inclined diagonally at the shortest distance from the cooling water outlet pipe 5 is easily formed. If only the cooling water outlet pipe 5 is provided, stagnation of the cooling water 9 is formed in the vicinity of the corner of the shell 1 facing the cooling water inlet pipe 4. A bypass outlet pipe 5a is provided at a facing position, and a portion of the cooling water 9 is extracted from the bypass outlet pipe 5a to prevent the formation of stagnation of the cooling water 9. The heat exchange efficiency is lowered at this portion, and the tube 3 is locally The possibility of thermal deformation can be avoided in advance.

尚、同様のＥＧＲクーラに関連する先行技術文献情報としては、本発明と同じ出願人により下記の特許文献１，２が既に先行出願されている。
特開２００２−３２７６５４号公報 特開２０００−４５８８４号公報 As prior art document information related to the same EGR cooler, the following patent documents 1 and 2 have already been filed by the same applicant as the present invention.
JP 2002-327654 A JP 2000-45884 A

しかしながら、従来におけるバイパス出口管５ａは、シェル１内に混入した空気を排出するための空気抜き口を兼ねていたため、冷却水入口管４が下でバイパス出口管５ａが上になるように両者を鉛直方向に対向配置しなければならず、ＥＧＲクーラの車両への搭載姿勢が制約を受けるという問題があった。   However, the conventional bypass outlet pipe 5a also serves as an air vent for discharging the air mixed in the shell 1, so that both of them are vertically arranged so that the cooling water inlet pipe 4 is down and the bypass outlet pipe 5a is up. There is a problem that the mounting posture of the EGR cooler on the vehicle is restricted because it must be disposed opposite to the direction.

本発明は、上述の実情に鑑みて成されたもので、ＥＧＲクーラの車両への搭載姿勢に制約を与えることなく冷却水の澱みの形成を防止することを目的としている。   The present invention has been made in view of the above circumstances, and an object of the present invention is to prevent the formation of cooling water stagnation without restricting the mounting posture of the EGR cooler on the vehicle.

本発明は、チューブと、該チューブを包囲するシェルとを備え、該シェルの内部に冷却水を給排し且つ前記チューブ内に排気ガスを通して該排気ガスと前記冷却水とを熱交換するようにしたＥＧＲクーラであって、前記シェルの軸心方向一端近傍に環状の冷却水供給チャンバを外嵌装着すると共に、該冷却水供給チャンバの円周方向の適宜位置に冷却水入口管を接続し、前記シェルの前記冷却水供給チャンバにより被包された部分の周方向複数箇所に、前記冷却水入口管の接続箇所から周方向に離れるにつれて段階的に口径が小さくなるように連通孔を穿設し、該各連通孔から略均等に冷却水がシェル内に導入されるように構成したことを特徴とするものである。   The present invention includes a tube and a shell that surrounds the tube, supplies and discharges cooling water into the shell, and exchanges heat between the exhaust gas and the cooling water through the exhaust gas in the tube. An annular cooling water supply chamber is externally fitted near one end in the axial direction of the shell, and a cooling water inlet pipe is connected to an appropriate position in the circumferential direction of the cooling water supply chamber. Communication holes are drilled in a plurality of locations in the circumferential direction of the shell encapsulated by the cooling water supply chamber so that the diameter gradually decreases as the distance from the connection location of the cooling water inlet pipe increases in the circumferential direction. The cooling water is introduced into the shell substantially uniformly from the communication holes.

而して、このようにすれば、冷却水入口管から冷却水供給チャンバに導入された冷却水が該冷却水供給チャンバ内の全周に行き亘り、各連通孔から略均等にシェル内に分散導入されることになるので、該シェルの軸心方向一端近傍にて冷却水の澱みが形成されなくなる。   Thus, in this way, the cooling water introduced from the cooling water inlet pipe to the cooling water supply chamber extends over the entire circumference of the cooling water supply chamber, and is distributed substantially uniformly in the shell from each communication hole. Since it is introduced, no stagnation of cooling water is formed near one end in the axial direction of the shell.

また、冷却水入口管が下向きになるような姿勢でＥＧＲクーラを車両に搭載しなくても、シェルの周方向に連続する複数の連通孔のうちの最上位に配置されるものが、シェル内から空気を排出するための空気抜き口の役割を果たすことになるので、ＥＧＲクーラの姿勢をシェルの軸心回りに回転させて冷却水入口管の向きを自由に変更することが可能となる。   Further, even if the EGR cooler is not mounted on the vehicle in such a posture that the cooling water inlet pipe faces downward, the one arranged at the top of the plurality of communication holes continuous in the circumferential direction of the shell is Therefore, it becomes possible to freely change the direction of the cooling water inlet pipe by rotating the attitude of the EGR cooler about the axis of the shell.

また、本発明においては、シェルの冷却水供給チャンバにより被包された部分における冷却水入口管との対峙位置に、連通孔を穿設しない非開口部を周方向所要範囲に亘り確保することが好ましく、このようにすれば、冷却水入口管から導入された冷却水が最初に非開口部に突き当たることにより良好に二手に振り分けられ、冷却水供給チャンバ内の全周に効率良く行き亘ることになる。   Further, in the present invention, it is possible to secure a non-opening portion that does not have a communication hole at a position facing the cooling water inlet pipe in a portion encapsulated by the cooling water supply chamber of the shell over a required range in the circumferential direction. Preferably, in this way, the cooling water introduced from the cooling water inlet pipe is distributed to the second well when it first hits the non-opening, and efficiently spreads all around the cooling water supply chamber. Become.

上記した本発明のＥＧＲクーラによれば、冷却水を各連通孔から略均等にシェル内に分散導入して澱みの形成を防止することができるので、排気ガスと冷却水との熱交換効率を大幅に向上し且つチューブの局所的な高温化による熱変形を確実に防止することができ、しかも、ＥＧＲクーラの姿勢をシェルの軸心回りに回転させて冷却水入口管の向きを自由に変更することができるので、ＥＧＲクーラの車両への搭載姿勢に関する制約を従来より大幅に緩和することができるという優れた効果を奏し得る。   According to the above-described EGR cooler of the present invention, the cooling water can be dispersed and introduced into the shell substantially uniformly from each communication hole to prevent the formation of starch, so that the heat exchange efficiency between the exhaust gas and the cooling water can be improved. Greatly improved and can reliably prevent thermal deformation due to local high temperature of the tube, and the orientation of the cooling water inlet pipe can be freely changed by rotating the EGR cooler around the axis of the shell Therefore, it is possible to achieve an excellent effect that the restriction on the mounting posture of the EGR cooler on the vehicle can be relieved more than before.

以下、本発明の実施の形態を図に基づいて説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図１〜図４は本発明の実施する形態の一例を示すもので、図５と同一部分については同一符号を付してある。   1 to 4 show an example of an embodiment of the present invention, and the same parts as those in FIG.

図１及び図２に示す如く、本形態例のＥＧＲクーラにおいては、シェル１の軸心方向一端近傍（図１における左端近傍）に環状の冷却水供給チャンバ１１を外嵌装着すると共に、該冷却水供給チャンバ１１の円周方向の適宜位置（図示では最下部）に冷却水入口管４を接続し、前記シェル１の前記冷却水供給チャンバ１１により被包された部分の周方向複数箇所には、前記冷却水入口管４の接続箇所から周方向に離れるにつれて段階的に口径が小さくなるように連通孔１２を穿設し、該各連通孔１２から略均等に冷却水９がシェル１内に導入されるように構成している。   As shown in FIGS. 1 and 2, in the EGR cooler of this embodiment, an annular cooling water supply chamber 11 is externally fitted near one end in the axial direction of the shell 1 (near the left end in FIG. 1), and the cooling is performed. A cooling water inlet pipe 4 is connected to an appropriate position in the circumferential direction of the water supply chamber 11 (the lowermost part in the figure), and a plurality of circumferential portions of the portion of the shell 1 encapsulated by the cooling water supply chamber 11 are provided. The communication holes 12 are formed in such a manner that the diameter gradually decreases as the distance from the connection portion of the cooling water inlet pipe 4 in the circumferential direction, and the cooling water 9 enters the shell 1 from the communication holes 12 approximately evenly. It is configured to be introduced.

また、前記シェル１の冷却水供給チャンバ１１により被包された部分における冷却水入口管４との対峙位置には、連通孔１２を穿設しない非開口部１３を周方向所要範囲に亘り確保してある。   In addition, a non-opening portion 13 that does not have a communication hole 12 is secured over a required range in the circumferential direction at a position facing the cooling water inlet pipe 4 in a portion encapsulated by the cooling water supply chamber 11 of the shell 1. It is.

尚、ここに図示している例では、シェル１の軸心方向他端近傍（図１における右端近傍）にも環状の冷却水排出チャンバ１４を外嵌装着すると共に、該冷却水排出チャンバ１４の円周方向の適宜位置（図示では最上部）に冷却水出口管５を接続し、前記シェル１の前記冷却水排出チャンバ１４により被包された部分の周方向複数箇所にも連通孔１５を穿設しているが、従来通りに冷却水出口管５だけを配設しても良い。   In the example shown here, an annular cooling water discharge chamber 14 is also fitted to the vicinity of the other end in the axial direction of the shell 1 (near the right end in FIG. 1). A cooling water outlet pipe 5 is connected to an appropriate position in the circumferential direction (the uppermost part in the drawing), and communication holes 15 are also drilled at a plurality of circumferential positions of the shell 1 covered by the cooling water discharge chamber 14. However, only the cooling water outlet pipe 5 may be provided as usual.

即ち、冷却水９の排出側においては、既に主たる熱交換が終了して排気ガス１０と冷却水９との温度差が小さくなっており、冷却水９の澱みに起因したチューブ３の局所的な高温化の心配がないため、冷却水９の澱みの形成がそれほど問題視されないからである。   That is, on the discharge side of the cooling water 9, the main heat exchange has already been completed and the temperature difference between the exhaust gas 10 and the cooling water 9 is small, and the locality of the tube 3 due to the stagnation of the cooling water 9 is reduced. This is because the formation of the stagnation of the cooling water 9 is not considered as a problem because there is no concern about the high temperature.

而して、このようにすれば、冷却水入口管４から冷却水供給チャンバ１１に導入された冷却水９が、最初に非開口部１３に突き当たることにより良好に二手に振り分けられ、冷却水供給チャンバ１１内の全周に効率良く行き亘り、各連通孔１２から略均等にシェル１内に分散導入されることになるので、該シェル１の軸心方向一端近傍にて冷却水９の澱みが形成されなくなる。   Thus, in this way, the cooling water 9 introduced into the cooling water supply chamber 11 from the cooling water inlet pipe 4 is first distributed to the non-opening 13 and thus is well distributed to the two hands. Since it efficiently reaches the entire circumference of the chamber 11 and is distributed and introduced into the shell 1 from each of the communication holes 12 almost uniformly, the stagnation of the cooling water 9 occurs near one end in the axial direction of the shell 1. No longer formed.

また、冷却水入口管４が下向きになるような姿勢でＥＧＲクーラを車両に搭載しなくても、シェル１の周方向に連続する複数の連通孔１２のうちの最上位に配置されるものが、シェル１内から空気を排出するための空気抜き口の役割を果たすことになるので、例えば、図３や図４に示す如く、ＥＧＲクーラの姿勢をシェル１の軸心回りに回転させて冷却水入口管４の向きを自由に変更することが可能となる。   Further, even if the EGR cooler is not mounted on the vehicle in such a posture that the cooling water inlet pipe 4 faces downward, the one arranged at the top of the plurality of communication holes 12 continuous in the circumferential direction of the shell 1 is used. Therefore, as shown in FIGS. 3 and 4, for example, the EGR cooler is rotated around the axis of the shell 1 to cool the cooling water. The direction of the inlet pipe 4 can be freely changed.

従って、上記形態例によれば、冷却水９を各連通孔１２から略均等にシェル１内に分散導入して澱みの形成を防止することができるので、排気ガス１０と冷却水９との熱交換効率を大幅に向上し且つチューブ３の局所的な高温化による熱変形を確実に防止することができ、しかも、ＥＧＲクーラの姿勢をシェル１の軸心回りに回転させて冷却水入口管４の向きを自由に変更することができるので、ＥＧＲクーラの車両への搭載姿勢に関する制約を従来より大幅に緩和することができる。   Therefore, according to the above-described embodiment, the cooling water 9 can be dispersed and introduced into the shell 1 substantially uniformly from the respective communication holes 12 to prevent the formation of starch, so that the heat of the exhaust gas 10 and the cooling water 9 can be prevented. The exchange efficiency can be greatly improved and thermal deformation due to local high temperature of the tube 3 can be surely prevented, and the attitude of the EGR cooler is rotated around the axis of the shell 1 so that the cooling water inlet pipe 4 Since the orientation of the EGR cooler can be freely changed, restrictions on the mounting posture of the EGR cooler on the vehicle can be relieved more than before.

尚、本発明のＥＧＲクーラは、上述の形態例にのみ限定されるものではなく、本発明の要旨を逸脱しない範囲内において種々変更を加え得ることは勿論である。   Note that the EGR cooler of the present invention is not limited to the above-described embodiments, and various changes can be made without departing from the scope of the present invention.

本発明を実施する形態の一例を示す断面図である。It is sectional drawing which shows an example of the form which implements this invention. 図１のＩＩ−ＩＩ矢視の断面図である。It is sectional drawing of the II-II arrow of FIG. ＥＧＲクーラの図２とは異なる搭載姿勢を示す断面図である。It is sectional drawing which shows the mounting attitude | position different from FIG. 2 of an EGR cooler. ＥＧＲクーラの図２とは異なる別の搭載姿勢を示す断面図である。It is sectional drawing which shows another mounting attitude | position different from FIG. 2 of an EGR cooler. 従来のＥＧＲクーラの一例を示す断面図である。It is sectional drawing which shows an example of the conventional EGR cooler.

符号の説明Explanation of symbols

１ シェル
３ チューブ
４ 冷却水入口管
５ 冷却水出口管
９ 冷却水
１０ 排気ガス
１１ 冷却水供給チャンバ
１２ 連通孔
１３ 非開口部 DESCRIPTION OF SYMBOLS 1 Shell 3 Tube 4 Cooling water inlet pipe 5 Cooling water outlet pipe 9 Cooling water 10 Exhaust gas 11 Cooling water supply chamber 12 Communication hole 13 Non-opening part

Claims (2)

チューブと、該チューブを包囲するシェルとを備え、該シェルの内部に冷却水を給排し且つ前記チューブ内に排気ガスを通して該排気ガスと前記冷却水とを熱交換するようにしたＥＧＲクーラであって、前記シェルの軸心方向一端近傍に環状の冷却水供給チャンバを外嵌装着すると共に、該冷却水供給チャンバの円周方向の適宜位置に冷却水入口管を接続し、前記シェルの前記冷却水供給チャンバにより被包された部分の周方向複数箇所に、前記冷却水入口管の接続箇所から周方向に離れるにつれて段階的に口径が小さくなるように連通孔を穿設し、該各連通孔から略均等に冷却水がシェル内に導入されるように構成したことを特徴とするＥＧＲクーラ。   An EGR cooler comprising a tube and a shell surrounding the tube, wherein cooling water is supplied to and discharged from the inside of the shell, and heat is exchanged between the exhaust gas and the cooling water through the exhaust gas in the tube. An annular cooling water supply chamber is externally fitted near one end in the axial direction of the shell, and a cooling water inlet pipe is connected to an appropriate position in the circumferential direction of the cooling water supply chamber, Communication holes are formed at a plurality of locations in the circumferential direction of the portion encapsulated by the cooling water supply chamber so that the diameter gradually decreases as the distance from the connection location of the cooling water inlet pipe increases in the circumferential direction. An EGR cooler characterized in that cooling water is introduced into the shell substantially uniformly from the holes. シェルの冷却水供給チャンバにより被包された部分における冷却水入口管との対峙位置に、連通孔を穿設しない非開口部を周方向所要範囲に亘り確保したことを特徴とする請求項１に記載のＥＧＲクーラ。   The non-opening part which does not perforate | pierce a communicating hole in the position facing the cooling water inlet pipe in the part enclosed by the cooling water supply chamber of the shell was ensured over the circumferential direction required range. The EGR cooler described.
JP2003276680A 2003-07-18 2003-07-18 Egr cooler Pending JP2005036765A (en)

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JP2003276680A JP2005036765A (en) 2003-07-18 2003-07-18 Egr cooler
EP04747406A EP1647697A1 (en) 2003-07-18 2004-07-12 Egr cooler
US10/564,160 US20060201661A1 (en) 2003-07-18 2004-07-12 Egr cooler
KR1020067000850A KR20060063885A (en) 2003-07-18 2004-07-12 Egr cooler
PCT/JP2004/009940 WO2005008055A1 (en) 2003-07-18 2004-07-12 Egr cooler
CNA2004800207459A CN1826461A (en) 2003-07-18 2004-07-12 Egr cooler

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EP (1) EP1647697A1 (en)
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KR (1) KR20060063885A (en)
CN (1) CN1826461A (en)
WO (1) WO2005008055A1 (en)

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JP2009114924A (en) * 2007-11-05 2009-05-28 Tokyo Radiator Mfg Co Ltd Egr cooler
WO2009094637A2 (en) * 2008-01-24 2009-07-30 Modine Manufacturing Company Air-cooled heat exchanger and blower assembly and method
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JP2020513535A (en) * 2016-12-13 2020-05-14 ザ テキサス エー アンド エム ユニバーシティ システム Specific application to vapor compression desalination of sensible and latent heat exchangers
JP7148537B2 (en) 2016-12-13 2022-10-05 ザ テキサス エー アンド エム ユニバーシティ システム Specific application of sensible and latent heat exchangers to vapor compression desalination

Also Published As

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EP1647697A1 (en) 2006-04-19
US20060201661A1 (en) 2006-09-14
WO2005008055A1 (en) 2005-01-27
KR20060063885A (en) 2006-06-12
CN1826461A (en) 2006-08-30

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