EP2469211A2 - Wärmetauscher mit mehreren Rohrleitungen - Google Patents

Wärmetauscher mit mehreren Rohrleitungen Download PDF

Info

Publication number
EP2469211A2
EP2469211A2 EP11195749A EP11195749A EP2469211A2 EP 2469211 A2 EP2469211 A2 EP 2469211A2 EP 11195749 A EP11195749 A EP 11195749A EP 11195749 A EP11195749 A EP 11195749A EP 2469211 A2 EP2469211 A2 EP 2469211A2
Authority
EP
European Patent Office
Prior art keywords
tube portion
outer tube
heat exchanger
tube
tapered
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.)
Withdrawn
Application number
EP11195749A
Other languages
English (en)
French (fr)
Other versions
EP2469211A3 (de
Inventor
Tetsuya Suzuki
Akihiro Sawamura
Yasufumi Sakakibara
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.)
Maruyasu Industries Co Ltd
Original Assignee
Maruyasu Industries 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 Maruyasu Industries Co Ltd filed Critical Maruyasu Industries Co Ltd
Publication of EP2469211A2 publication Critical patent/EP2469211A2/de
Publication of EP2469211A3 publication Critical patent/EP2469211A3/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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
    • F28D7/1684—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 the conduits having a non-circular cross-section
    • 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
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0006—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the plate-like or laminated conduits being enclosed within a pressure vessel
    • 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
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
    • 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
    • F28F9/001—Casings in the form of plate-like arrangements; Frames enclosing a heat exchange core
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • F28F21/082—Heat exchange elements made from metals or metal alloys from steel or ferrous alloys
    • F28F21/083—Heat exchange elements made from metals or metal alloys from steel or ferrous alloys from stainless steel

Definitions

  • the present invention relates to a multitubular heat exchanger which includes an inner tube (heat transfer tube) group through which a first fluid passes and an outer tube (shell) through which a second fluid passes, and for which the group of a plurality of heat transfer tubes are held in the outer tube.
  • the invention is, in a multitubular heat exchanger such as, for example, an exhaust gas recirculation system (hereinafter, abbreviated as "an EGR system") which performs heat exchange by passing of a high-speed high-temperature gas (gas) through the heat transfer tubes and passing of cooling water (liquid) through the shell, suitable for an exhaust cooler (a high degree of heat exchange capability is required) and the like which cools exhaust gas of an internal combustion engine by cooling water.
  • an EGR system exhaust gas recirculation system
  • a multitubular heat exchanger having an external form as shown in Fig. 1 to Fig. 2 has been frequently used.
  • the heat exchanger has had an internal structure as shown in Fig. 3 to Fig. 6 .
  • the heat exchanger includes a plurality of inner tubes (heat transfer tubes) 14, 14... through which a first fluid (high-temperature gas) passes, an outer tube (shell) 17 which holds the heat transfer tubes and for which a second fluid (cooling water) forms a pass-through gap, and rectifying cylinders 20, 21 attached at both ends of the outer tube 17.
  • the inner tube 14 includes thick tube portions 14a at both ends, a thin tube portion 14b at the middle, and a tapered tube portion 14c between the thin tube portion 14b and the thick tube portion 14a.
  • the inner tubes 14 are in sealed contact at the thick tube portions 14a and held and integrated by the outer tube 17, so that the second fluid pass-through gap S is formed between the outsides of each inner tube 14 and the inside of the outer tube 17.
  • a heat transfer fin 22 is inserted from the viewpoint of heat conductivity.
  • a heat exchanger is usually produced, after mutually assembling the members, by integration through brazing or welding.
  • the inner tube 14 is formed divided into portions of a receiving inner tube portion 15 and a covering inner tube portion 16, and the outer tube 17, of a receiving outer tube portion 18 and a covering outer tube portion 19.
  • the receiving inner tube portion 15 is fitted therein.
  • the inner tubes 14, 14... thus prepared are fitted in plural numbers with the receiving outer tube portion 18 and the covering outer tube portion 19, respectively, and then the covering outer tube portion 19 is inverted, and placed to cover the receiving outer tube portion 18 (refer to Fig. 5 ).
  • the outer tube 17 with the rectifying cylinders 20, 21 fitted at both ends is, as a heat exchanger assembly, passed through a brazing furnace so as to be integrated.
  • the receiving outer tube portion 18 and the covering outer tube portion 19 may be integrated in advance by spot welding and the like.
  • JP2002-28775 A , JP2005-37002 A and JP2004-317002 A can be mentioned as prior art documents related to measures against condensed water of heat exchangers although these have no effect on the patentability of the present invention.
  • Patent JP2002-28775 A discloses a technique regarding brazing when producing an EGR gas heat exchanger and the like by brazing using stainless steel.
  • JP2005-37002 A and JP2004-317002 A disclose a technique for securing the drainage of condensed water in a heat exchanger composed of flat tubes and corrugated fins to be used for an outdoor unit of a cooling and heating air conditioner.
  • a multitubular heat exchanger including a plurality of inner tubes through which a first fluid passes and an outer tube through which a second fluid passes, the inner tubes including thick tube portions at both ends, a thin tube portion at a middle, and a tapered tube portion between the thin tube portion and the thick tube portion, and the inner tubes being in sealed contact at the thick tube portions and held and integrated by the outer tube, so that a second fluid pass-through gap is formed between an outside of each inner tube and an inside of the outer tube, characterized in that the inner tube is tapered at one side in an upper and lower (vertical) direction of the tapered tube portion, and its surface (bottom surface) to be on a downside when the inner tube is used is provided as a longitudinal flat surface.
  • the surface (bottom surface) to be on the downside when the inner tube is used is provided as a flat surface, irrespective of the tilt angle with respect to the tapered angle at one side, no recess portion with respect to a horizontal plane is formed at a boundary portion between the tapered tube portion and the thick tube portion of the inner tube. Therefore, no condensed water (condensate) pool occurs, and as a result, advanced anticorrosion measures caused by pooling of condensed water are no longer necessary. Moreover, in the case of application to a refrigerating machine and the like, degradation in heat exchanging performance due to condensed water freezing to obstruct the first fluid flowing can also be prevented.
  • tapeered tube portion is intended to refer preferable to a reduced cross-sectional shape along the length of the portion without implying a conical shape. Rather, the inner tube preferably has in the tapered portion a reduced cross-sectional shape on a top surface only, while the bottom surface, and optionally the side surfaces, remain substantially planar or flat.
  • the outer tube is formed divided into portions of a receiving outer tube portion and a covering outer tube portion (119), and the receiving outer tube portion holds all of the inner tubes in a stacked manner to be closed with the covering outer tube portion so as to be integrated.
  • Fig. 1 is a front view showing an example of a conventional multitubular heat exchanger.
  • Fig. 2 is a side view of the same.
  • Fig. 3 is a sectional view taken along arrows 3-3 of Fig. 1 .
  • Fig. 4 is a sectional view taken along arrows 4-4 of Fig. 3 .
  • Fig. 5 is a sectional view taken along arrows 5-5 of Fig. 1 and a view for explaining assembly of a heat exchanger using the sectional view.
  • Fig. 6 is a sectional view taken along arrows 6-6 of Fig. 1 .
  • Fig. 7 is a view for explaining occurrence of condensed water pooling in the inner tubes of a conventional heat exchanger and for elimination thereof.
  • Fig. 8 is a front view showing an example of a multitubular heat exchanger of the present invention.
  • Fig. 9 is a side view of the same.
  • Fig. 10 is a sectional view taken along arrows 10-10 of Fig. 8 .
  • Fig. 11 is a sectional view taken along arrows 11-11 of Fig. 10 .
  • Fig. 12 is a sectional view taken along arrows 12-12 of Fig. 8 and a view for explaining assembly of a heat exchanger using the sectional view.
  • Fig. 13 is a sectional view taken along arrows 13-13 of Fig. 8 .
  • Fig. 14 is a view for explaining elimination of condensed water pooling in the inner tubes of a heat exchanger in an embodiment of the present invention.
  • the multitubular heat exchanger includes a plurality of inner tubes 114, 114... through which exhaust gas (first fluid) passes and an outer tube 117 through which cooling water (second fluid) passes.
  • the inner tube 114 includes thick tube portions 114a at both ends, a thin tube portion 114b at the middle, and a tapered tube portion 114c between the thin tube portion 114b and the thick tube portion 114a.
  • the inner tubes 114 are in sealed contact at the thick tube portions 114a and held and integrated by the outer tube 117, so that a second fluid pass-through gap S is formed between the outside of each inner tube 114 and the inside of the outer tube 117.
  • the inner tube 114 is formed of divided portions of a receiving inner tube portion 115 and a covering inner tube portion 116, and a heat transfer fin 122 is inserted in and integrated with the inner tube 114.
  • the inner tube may be formed of a pultruded article or a seamless tube.
  • projections to produce longitudinal eddies may be formed inside (refer to Abstracts etc., of JP2002-350081 A and JP2002-181468 A ).
  • the present embodiment has substantially the same configuration as that of the conventional example.
  • the inner tube 114 is tapered at one side in the upper and lower direction of the tapered tube portion 114c, and its surface (bottom surface) to be on the downside when the inner tube 114 is used is provided as a longitudinal flat surface.
  • the outer tube 117 is a divided body of a receiving outer tube portion 118 and a covering outer tube portion 119, which is the same as in the conventional example, but is different in sectional shape. That is, the receiving outer tube portion 118 has a U-shaped section that can hold all of the inner tubes 114, 114... , and holds all (in the illustration, five) of the inner tubes 114, 114... in a stacked manner to be closed with the covering outer tube portion so as to be integrated.
  • rectifying cylinders 120, 121 are connected and integrated.
  • the rectifying cylinders are also formed, in consideration of drainage when condensed water occurs, with circular connection ports 120a, 121 a eccentrically located so that the sides to serve as lower surfaces (bottom surfaces) when used have linear sections.
  • reference sign 117a denotes a positioning protrusion when assembling by fitting the rectifying cylinders 120, 121 with the outer tube 117.
  • the plate thickness of the outer tube and rectifying cylinders is provided as 0.5mm to 3mm (desirably, 1 mm to 2mm), and the inner tubes and heat transfer fins: as 0.05mm to 1 mm (desirably, 0.1 mm to 0.8mm).
  • the heat transfer fin 122 is set (inserted for assembly) in the covering inner tube portion 116, and then the receiving inner tube portion 115 is fitted for assembly.
  • the mode of bonding of the members is brazing at this time.
  • the material of these members is stainless steel as described above, usually, a copper brazing filler or a nickel brazing filler is used.
  • the plurality of (in the illustration, five) inner tubes 114, 114... thus prepared are all set in the receiving outer tube portion 118, and then covered with the covering outer tube portion 119. Bonding of the inner tubes 114, 114... and of the inner tube 114 and the outer tube 117 is performed by the same brazing as described above.
  • bonding of the receiving outer tube portion 118 and the covering outer tube portion 119 is also performed, usually, by the same brazing as described above.
  • rectifying cylinders 120, 121 are inserted in the outer tube 117, and brazed in the same manner as described above.
  • the heat exchanger assembly is passed through a brazing furnace (vacuum furnace) so that the members are mutually brazed and integrated. Heating and cooling conditions during brazing are set in consideration of the type and heat capacity of the brazing filler metal.
  • the manufactured multitubular heat exchanger is, with its side to be a flat surface located on the downside, mounted on the piping system of an EGR system.

Landscapes

  • 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)
  • Exhaust-Gas Circulating Devices (AREA)
EP11195749.4A 2010-12-27 2011-12-27 Wärmetauscher mit mehreren Rohrleitungen Withdrawn EP2469211A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2010290129A JP2012137251A (ja) 2010-12-27 2010-12-27 多管式熱交換器

Publications (2)

Publication Number Publication Date
EP2469211A2 true EP2469211A2 (de) 2012-06-27
EP2469211A3 EP2469211A3 (de) 2014-03-05

Family

ID=45444488

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11195749.4A Withdrawn EP2469211A3 (de) 2010-12-27 2011-12-27 Wärmetauscher mit mehreren Rohrleitungen

Country Status (2)

Country Link
EP (1) EP2469211A3 (de)
JP (1) JP2012137251A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160223272A1 (en) * 2013-09-13 2016-08-04 T.Rad Co., Ltd. Tank structure for header-plate-less heat exchanger
EP3273197A1 (de) * 2011-11-30 2018-01-24 Tokyo Radiator Mfg. Co., Ltd. Agr-kühlvorrichtung

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6000769B2 (ja) * 2012-09-12 2016-10-05 株式会社ティラド ヘッダプレートレス熱交換器のタンク接続構造
JP6007838B2 (ja) * 2013-03-22 2016-10-12 トヨタ自動車株式会社 熱交換器
JP2015055459A (ja) * 2013-09-13 2015-03-23 株式会社ティラド ヘッダープレートレス熱交換器のタンク構造
JP6296837B2 (ja) * 2014-03-07 2018-03-20 株式会社ティラド タンクのシール構造

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002028775A (ja) 2000-05-10 2002-01-29 Denso Corp 耐腐食性熱交換器の製造方法
JP2002181468A (ja) 2000-12-12 2002-06-26 Maruyasu Industries Co Ltd 多管式熱交換器
JP2002350081A (ja) 2001-05-25 2002-12-04 Maruyasu Industries Co Ltd 多管式熱交換器
JP2004317002A (ja) 2003-04-15 2004-11-11 Matsushita Electric Ind Co Ltd 熱交換器
JP2005037002A (ja) 2003-07-16 2005-02-10 Matsushita Electric Ind Co Ltd 熱交換器

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4602714B2 (ja) * 2004-08-19 2010-12-22 株式会社ティラド 熱交換器
CA2503424A1 (en) * 2005-04-01 2006-10-01 Dana Canada Corporation Stacked-tube heat exchanger
WO2007031306A1 (de) * 2005-09-16 2007-03-22 Behr Gmbh & Co. Kg Wärmeübertrager, insbesondere abgaswärmeübertrager für kraftfahrzeuge
DE102005055481A1 (de) * 2005-11-18 2007-05-24 Behr Gmbh & Co. Kg Wärmetauscher für einen Verbrennungsmotor
JP4817879B2 (ja) * 2006-02-23 2011-11-16 マルヤス工業株式会社 熱交換器
JP5203759B2 (ja) * 2008-03-19 2013-06-05 株式会社ティラド 熱交換器
JP2010048536A (ja) * 2008-08-25 2010-03-04 Denso Corp 熱交換器
JP2010203631A (ja) * 2009-02-27 2010-09-16 Tokyo Radiator Mfg Co Ltd Ｕターンチューブ
JP4773541B2 (ja) * 2009-04-09 2011-09-14 マルヤス工業株式会社 多管式熱交換器
JP5321271B2 (ja) * 2009-06-17 2013-10-23 株式会社デンソー 高温ガス冷却用熱交換器

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002028775A (ja) 2000-05-10 2002-01-29 Denso Corp 耐腐食性熱交換器の製造方法
JP2002181468A (ja) 2000-12-12 2002-06-26 Maruyasu Industries Co Ltd 多管式熱交換器
JP2002350081A (ja) 2001-05-25 2002-12-04 Maruyasu Industries Co Ltd 多管式熱交換器
JP2004317002A (ja) 2003-04-15 2004-11-11 Matsushita Electric Ind Co Ltd 熱交換器
JP2005037002A (ja) 2003-07-16 2005-02-10 Matsushita Electric Ind Co Ltd 熱交換器

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3273197A1 (de) * 2011-11-30 2018-01-24 Tokyo Radiator Mfg. Co., Ltd. Agr-kühlvorrichtung
US9909475B2 (en) 2011-11-30 2018-03-06 Tokyo Radiator Mfg. Co., Ltd. EGR cooler
US20160223272A1 (en) * 2013-09-13 2016-08-04 T.Rad Co., Ltd. Tank structure for header-plate-less heat exchanger
US9995540B2 (en) * 2013-09-13 2018-06-12 T.Rad Co., Ltd. Tank structure for header-plate-less heat exchanger

Also Published As

Publication number Publication date
EP2469211A3 (de) 2014-03-05
JP2012137251A (ja) 2012-07-19

Similar Documents

Publication Publication Date Title
US11162743B2 (en) Heat exchanger tank
CN108139183B (zh) 热交换器
EP2469211A2 (de) Wärmetauscher mit mehreren Rohrleitungen
US7237605B2 (en) Heat exchanger
US10101096B2 (en) Heat exchanger
US7255158B2 (en) Heat exchanger
US20080000626A1 (en) Heat exchanger
US8136578B2 (en) Heat exchanger for EGR-gas
US20080230213A1 (en) Fully-Metal Heat Exchanger And Method For Its Production
JP5803768B2 (ja) 熱交換器用フィンおよび熱交換器
US20080000627A1 (en) Heat exchanger
JPWO2017013918A1 (ja) 熱交換器
EP3623738B1 (de) Wärmetauscherröhre
US20160363380A1 (en) Heat exchanger
JP2009150587A (ja) 熱交換器
JP2009515127A (ja) 熱交換器ヘッダタンクのための強化されたマニホルド、およびこのようなマニホルドを備えるヘッダタンク
JP5772608B2 (ja) 熱交換器
KR100666927B1 (ko) 헤더형 열교환기
CN1977138A (zh) 热交换器，特别是用于汽车的增压空气冷却器
CN220853239U (zh) 换热管及热交换器
JP6083272B2 (ja) 熱交換器
KR100668445B1 (ko) 헤더형 열교환기
JP7485993B1 (ja) 熱交換器
EP2824411A2 (de) Wärmetauschervorrichtung
JP2020200986A (ja) 熱交換器

Legal Events

Date Code Title Description
AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

RIC1 Information provided on ipc code assigned before grant

Ipc: F28F 9/00 20060101ALI20140130BHEP

Ipc: F28D 9/00 20060101ALI20140130BHEP

Ipc: F28D 7/16 20060101AFI20140130BHEP

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20140906