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EP1154143A1 - Refroidisseur egr - Google Patents

Refroidisseur egr Download PDF

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Publication number
EP1154143A1
EP1154143A1 EP00900810A EP00900810A EP1154143A1 EP 1154143 A1 EP1154143 A1 EP 1154143A1 EP 00900810 A EP00900810 A EP 00900810A EP 00900810 A EP00900810 A EP 00900810A EP 1154143 A1 EP1154143 A1 EP 1154143A1
Authority
EP
European Patent Office
Prior art keywords
shell
tubes
exhaust gas
fixed
plate
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Withdrawn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
EP00900810A
Other languages
German (de)
English (en)
Other versions
EP1154143A4 (fr
Inventor
Keiichi Hino Motors Ltd NAKAGOME
Takashi Hino Motors Ltd TAKAKURA
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
Original Assignee
Hino Motors 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 filed Critical Hino Motors Ltd
Publication of EP1154143A1 publication Critical patent/EP1154143A1/fr
Publication of EP1154143A4 publication Critical patent/EP1154143A4/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
    • F28F9/182—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding the heat-exchange conduits having ends with a particular shape, e.g. deformed; the heat-exchange conduits or end plates having supplementary joining means, e.g. abutments
    • 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
    • F02M26/11—Manufacture or assembly of EGR systems; Materials or coatings specially adapted for EGR systems
    • 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
    • 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
    • F28F9/0229—Double end plates; Single end plates with hollow spaces
    • 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

Definitions

  • This invention relates to an EGR cooler attached to an EGR apparatus, which recirculates exhaust gas from an engine to suppress generation of nitrogen oxides, so as to cool the exhaust gas for recirculation.
  • EGR apparatus which recirculates part of exhaust gas from an engine in a vehicle or the like to the engine to suppress generation of nitrogen oxides.
  • cooling the exhaust gas to be recirculated to the engine will drop the temperature of and reduce the volume of the exhaust gas to lower the combustion temperature in the engine without substantial decrease of output thereof, thereby effectively suppressing generation of nitrogen oxides.
  • some EGR apparatuses are equipped with, midway of exhaust gas recirculation lines to the engines, EGR coolers for cooling the exhaust gas.
  • Fig. 1 is a sectional view showing an example of the above-described EGR cooler wherein reference numeral 1 denotes a cylindrical shell with axial opposite ends to which plates 2 are respectively fixed to close the ends of the shell 1. Penetratingly fixed to the respective plates 2 are opposite ends of a number of tubes 3 which extend axially within the shell 1.
  • a cooling water inlet 4 is attached from outside to the shell 1 near one end thereof and a cooling water outlet 5 is attached from outside to the shell 1 near the other end thereof so that cooling water 9 is supplied via the cooling water inlet 4 into the shell 1, flows outside of the tubes 3 and is discharged via the cooling water outlet 5 out of the shell 1.
  • the respective plates 2 have, on their sides away from the shell 1, bowl-shaped hoods 6 fixed to the plates 2 so as to enclose end faces of the plates 2.
  • the one and the other hoods 6 provide central exhaust gas inlet and outlet 7 and 8, respectively, so that the exhaust gas 10 from the engine enters via the exhaust gas inlet 7 into the one hood 6, is cooled, during passage through the tubes 3, by heat exchange with the cooling water 9 flowing outside of the tubes 3 and is discharged to the other hood 6 to be recirculated to the engine via the exhaust gas outlet 8.
  • the end of the tube 3 penetrates into and is fixed to the plate 2 via a brazed portion 11 as shown in Fig. 2 in an enlarged scale.
  • cooling the exhaust gas 10 in the tube 3 will generate condensate containing a vitriolic component which may flow out via the outlet of the tube 3 and corrode the brazing metal (generally nickel brazing metal) constituting the brazed portion 11. If the cooling water 9 should leak therethrough, it may be guided to the engine, causing a trouble.
  • laser radiation L is effected from directly above, with the tube 3 being stood upright. Therefore, to merely increase the laser intensity for the purpose of increasing the weld depth will disadvantageously result in an increased possibility that the molten portion may flow into the tube 3 to narrow the flow channel. Thus, to increase the laser intensity is inherently limitative.
  • the tube 3 is welded to a through-hole 13 of the plate 2 over only a small area on the side away from the shell 1. Therefore, minute crevice may be formed over a major part of the boundary between the through-hole 13 and the tube 3. In this crevice, cavitation may occur due to variation of hydraulic pressure derived from minute vibrations of the tube 3, resulting in generation of crevice corrosion in a deepest portion of the crevice (a portion abutting on the laser weld 12). As a result, the end of the tube 3 may be damaged to cause leakage of the cooling water 9.
  • the present invention was made in view of the above facts and has its object to prevent the cooling water from leaking out to the flow channels of the exhaust gas, thereby preventing engine trouble from occurring.
  • the inner periphery of the tapered portion has a shape divergent to the side away from the shell to have a bevel in the form of mortar, so that laser radiation from the side away from the shell can be readily carried out throughout the inner periphery of the tapered portion.
  • a resulting laser weld has a high bonding strength, the weld depth being increased to an extent corresponding to the thickness of the plate. Moreover, formation of minute crevice between the tube and the through-hole of the plate is avoided so that no crevice corrosion occurs.
  • any condensate containing a vitriolic component which may be generated by cooling the exhaust gas in the tube and may flow out via the outlet of the tube, to be isolated by the sub plate to which the tubes penetratingly fixed via the laser welds having high resistance against corrosion such that no condensate contacts the brazed portions of the plate.
  • corrosion of the brazing filler metal constituting the brazed portions due to the condensate is positively avoided while the bonding strength of the tubes to the plate is kept high by the brazed portions. Even if water should leak due to any crack created in the brazed portions, the cooling water is dammed by the sub plate to stay between the sub plate and the plate.
  • An EGR cooler comprises a shell in the form of a cylindrical container, tubes extending axially within the shell and having opposite ends penetratingly fixed to axial opposite ends of said shell, cooling water being supplied into and discharged from said shell, exhaust gas being passed through said tubes for thermal exchange of said exhaust gas with said cooling water, and is characterized in that the tubes have increased diameter and thickness so as to increase cross sectional areas and strength of flow channels, a gas flange being fitted over tips of the respective tubes extruded out of the shell.
  • Figs. 4 and 5 show an embodiment of the invention as set forth in claim 1 in which the same parts as those in Figs. 1 to 3 are denoted by the same reference numerals.
  • an end of a tube 3 penetrating a plate 2 is formed as a tapered portion 14 with diameter gradually increased toward the side away from a shell 1; the tapered portion 14 is wholly welded to the plate 2 by laser radiation L from the side away from the shell 1.
  • the inner periphery of the tapered portion 14 has a shape divergent to the side away from the shell 1 to have a bevel in the form of mortar, so that laser radiation L from the side away from the shell 1 can be readily carried out throughout the inner periphery of the tapered portion.
  • a resulting laser weld 12 has a high bonding strength, the weld depth D being increased to an extent corresponding to the thickness of the plate 2. Moreover, formation of minute crevice between the tube 3 and a through-hole 13 of the plate 2 is avoided so that no crevice corrosion occurs.
  • the laser weld 12 highly resistant against corrosion allows the tube 3 to be penetratingly fixed to the plate 2 with a high bonding strength, the weld depth D being increased in comparison with the conventional cases. Moreover, formation of minute crevice between the tube 3 and the through-hole 13 of the plate 2 is avoided to prevent crevice corrosion from occurring. As a result, the cooling water 9 can be positively prevented from leaking out to the flow channel of the exhaust gas 10, which eliminates any possibility of the cooling water 9 being guided to the engine, thereby preventing engine trouble from occurring.
  • Figs. 6 and 7 show an embodiment of the invention as set forth in claim 2.
  • an end of a tube 3 penetrates into a through-hole 13 of a plate 2 which is formed with a notch 15 on the side toward the shell 1, and is welded to the plate 2 by laser radiation L from the side away from the shell 1 such that a laser weld 12 reaches the notch 15.
  • Fig. 8 shows an embodiment of the invention as set forth in claim 3.
  • tubes 3 penetrate into and are fixed to a plate 2 via brazed portions 11 such that an end of the tube 3 extends out from the plate 2 by a predetermined length and the extending end of the tube 3 penetrates into and is fixed to a sub plate 16 by laser weld 12.
  • the sub plate 16 covers the brazed portions 11.
  • an outer periphery of the plate 2 is bent toward the axial direction of the tube 3 with a stepped portion being intervened, and the shell 1 and the bonnet 6 are butt-welded with the outer periphery of the plate 2 being therebetween.
  • the brazed portion 11 can be protected by the sub plate 16 against the condensate of the exhaust gas 10 while kept high is the bonding strength of the tubes 3 to the plate 2 by the brazed portions 11. As a result, corrosion of the brazed portions 11 can be prevented from occurring. Even if a crack may occur in the brazed portion 11 due to a factor other than the condensate of the exhaust gas 10, resulting in water leakage, the cooling water 9 can be dammed by the sub plate 16 to be accumulated between the sub plate 16 and the plate 2. As a result, the cooling water 9 may not be guided to the engine, and engine trouble can be prevented from occurring.
  • Fig. 9 shows an embodiment of the invention as set forth in claim 4. Used in this embodiment is a structure with a shell 1 in the form of a cylindrical container; opposite ends of tubes 3 axially extend in a shell 1 and are penetratingly fixed to opposite axial ends of the shell 1, respectively; the tubes 3 are increased in diameter and thickness in comparison with the conventional cases to increase flow sectional areas and strengths of flow channels, which allows the number of tubes 3 to be reduced to a required minimum (for example, three or so).
  • a gas flange 17 is fitted over tips of the respective tubes 3 extruded out of the shell 1.
  • the tubes 3 are decreased in diameter and thickness for effective cooling of the recirculated exhaust gas 10, which causes a cross sectional area per tube 3 to be decreased, resulting in necessity of using a great number of tubes 3 and of using a structure in which the tubes are supported by the plates 2 for passing of all the tubes 3 into the hoods 6.
  • the tubes 3 are increased in diameter and thickness in comparison with the conventional cases to increase the cross sectional areas and the strengths of the flow channels, which allows the number of tubes 3 to be reduced to a required minimum.
  • the shell 1 and tube 3 must be properly increased in length so as to maintain the cooling efficiency as before.
  • the condensate of the exhaust gas 10 has an adverse effect such as corrosion on the penetrating, fixed portions of the tubes 3 to the shell 1. Moreover, even if a crack should occur in the penetrating, fixed portions due to a factor other than the condensate of the exhaust gas 10 to cause water leakage, the leaked cooling water 9 can be positively prevented from intruding into the flow channels of the exhaust gas 10. As a result, the cooling water 9 may not be guided to the engine and engine trouble is prevented from occurring.
  • EGR cooler of the invention is not limited to the above embodiments and that various changes and modifications may be made without departing from the scope of the invention.
  • the outlet side of the exhaust gas is shown in the drawings; however, similar construction may be applicable on the inlet side of the exhaust gas.
  • the EGR cooler according to the invention is suitable for use in an EGR apparatus for recirculating exhaust gas from the engine to suppress generation of nitrogen oxides.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Manufacturing & Machinery (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Laser Beam Processing (AREA)
EP00900810A 1999-01-20 2000-01-19 Refroidisseur egr Withdrawn EP1154143A4 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP1177799 1999-01-20
JP11011777A JP2000213425A (ja) 1999-01-20 1999-01-20 Ｅｇｒク―ラ
PCT/JP2000/000217 WO2000043662A1 (fr) 1999-01-20 2000-01-19 Refroidisseur egr

Publications (2)

Publication Number Publication Date
EP1154143A1 true EP1154143A1 (fr) 2001-11-14
EP1154143A4 EP1154143A4 (fr) 2008-03-26

Family

ID=11787396

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00900810A Withdrawn EP1154143A4 (fr) 1999-01-20 2000-01-19 Refroidisseur egr

Country Status (4)

Country Link
EP (1) EP1154143A4 (fr)
JP (1) JP2000213425A (fr)
KR (1) KR100709027B1 (fr)
WO (1) WO2000043662A1 (fr)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004001203A3 (fr) * 2002-06-25 2004-03-04 Behr Gmbh & Co Echangeur thermique pour gaz d'echappement et procede de fabrication associe
WO2005038376A1 (fr) * 2003-10-17 2005-04-28 Behr Gmbh & Co. Kg Echangeur thermique conçu en particulier pour des vehicules automobiles
EP1553371A1 (fr) * 2004-01-12 2005-07-13 Behr GmbH & Co. KG Echangeur de chaleur, en particulier échangeur de chaleur à gaz d'échappement pour véhicule
WO2007082515A1 (fr) * 2006-01-23 2007-07-26 Alstom Technology Ltd. Échangeur de chaleur à faisceau de tubes
DE102006031606A1 (de) * 2006-07-06 2008-01-17 Behr Gmbh & Co. Kg Wärmetauscher zur Abgaskühlung, Verfahren zur Herstellung eines Wärmetauschers
WO2008125485A1 (fr) * 2007-04-13 2008-10-23 Valeo Termico S.A. Echangeur de chaleur pour gaz, et son procede de fabrication correspondant
CN103104378A (zh) * 2012-11-12 2013-05-15 无锡双翼汽车环保科技有限公司 Egr冷却器芯体
EP2031338A3 (fr) * 2007-08-28 2013-08-14 Behr GmbH & Co. KG Echangeur thermique
WO2014167041A1 (fr) * 2013-04-11 2014-10-16 Spx Flow Technology Danmark A/S Échangeur de chaleur hygiénique
US10094626B2 (en) 2015-10-07 2018-10-09 Arvos Ljungstrom Llc Alternating notch configuration for spacing heat transfer sheets
US10175006B2 (en) 2013-11-25 2019-01-08 Arvos Ljungstrom Llc Heat transfer elements for a closed channel rotary regenerative air preheater
US10197337B2 (en) 2009-05-08 2019-02-05 Arvos Ljungstrom Llc Heat transfer sheet for rotary regenerative heat exchanger
US10378829B2 (en) 2012-08-23 2019-08-13 Arvos Ljungstrom Llc Heat transfer assembly for rotary regenerative preheater
EP4206599A1 (fr) * 2021-12-30 2023-07-05 Robert Bosch GmbH Échangeur de chaleur, installation de traitement d'eau, pompe à chaleur

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JP2007051576A (ja) * 2005-08-17 2007-03-01 Tokyo Roki Co Ltd Ｅｇｒクーラ
JP4715800B2 (ja) * 2007-04-17 2011-07-06 トヨタ自動車株式会社 燃料冷却装置
FR2933178A1 (fr) * 2008-06-26 2010-01-01 Valeo Systemes Thermiques Echangeur de chaleur et carter pour l'echangeur
US9511151B2 (en) 2010-11-12 2016-12-06 Uti Limited Partnership Compositions and methods for the prevention and treatment of cancer
JP5923886B2 (ja) * 2011-07-20 2016-05-25 株式会社デンソー 排気冷却装置
US10988516B2 (en) 2012-03-26 2021-04-27 Uti Limited Partnership Methods and compositions for treating inflammation
US9603948B2 (en) 2012-10-11 2017-03-28 Uti Limited Partnership Methods and compositions for treating multiple sclerosis and related disorders
JP6132130B2 (ja) * 2012-11-30 2017-05-24 株式会社ノーリツ 熱交換器の製造方法
JP6153060B2 (ja) * 2013-03-30 2017-06-28 株式会社ノーリツ 熱交換器およびその製造方法
EP3065771B1 (fr) 2013-11-04 2019-03-20 UTI Limited Partnership Méthodes et compositions d'immunothérapie soutenue
WO2016133229A1 (fr) * 2015-02-16 2016-08-25 주식회사 다우정밀 Refroidisseur egr de type à canal de fluide de refroidissement
JP2016156592A (ja) * 2015-02-26 2016-09-01 カルソニックカンセイ株式会社 熱交換器
JP6342834B2 (ja) * 2015-03-20 2018-06-13 株式会社ユタカ技研 熱交換器の製造方法及び熱交換器
CN107847582A (zh) 2015-05-06 2018-03-27 优迪有限合伙公司 用于持续疗法的纳米颗粒组合物
KR20180010364A (ko) 2016-07-20 2018-01-31 현대자동차주식회사 Egr쿨러 결합구조
AU2018374569B2 (en) 2017-11-29 2024-10-17 Uti Limited Partnership Methods of treating autoimmune disease
DE102017222740B3 (de) * 2017-12-14 2019-03-14 Hanon Systems Abgaskühler und Abgasrückführsystem mit einem Abgaskühler

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Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7278473B2 (en) 2002-06-25 2007-10-09 Behr Gmbh & Co. Exhaust gas heat exchanger and method for the production thereof
WO2004001203A3 (fr) * 2002-06-25 2004-03-04 Behr Gmbh & Co Echangeur thermique pour gaz d'echappement et procede de fabrication associe
WO2005038376A1 (fr) * 2003-10-17 2005-04-28 Behr Gmbh & Co. Kg Echangeur thermique conçu en particulier pour des vehicules automobiles
EP1553371A1 (fr) * 2004-01-12 2005-07-13 Behr GmbH & Co. KG Echangeur de chaleur, en particulier échangeur de chaleur à gaz d'échappement pour véhicule
US7048042B2 (en) 2004-01-12 2006-05-23 Behr Gmgh & Co. Kg Heat exchanger, in particular exhaust gas heat exchanger for motor vehicles, and method for producing same
US9534850B2 (en) 2006-01-23 2017-01-03 Arvos Technology Limited Tube bundle heat exchanger
WO2007082515A1 (fr) * 2006-01-23 2007-07-26 Alstom Technology Ltd. Échangeur de chaleur à faisceau de tubes
US10914527B2 (en) 2006-01-23 2021-02-09 Arvos Gmbh Tube bundle heat exchanger
AU2007207217B2 (en) * 2006-01-23 2010-04-29 Arvos Gmbh Tube bundle heat exchanger
DE102006031606A1 (de) * 2006-07-06 2008-01-17 Behr Gmbh & Co. Kg Wärmetauscher zur Abgaskühlung, Verfahren zur Herstellung eines Wärmetauschers
EP1906130A3 (fr) * 2006-07-06 2008-04-09 Behr GmbH & Co. KG Echangeur thermique destiné au refroidissement des gaz, procédé destiné à la fabrication d'un échangeur thermique
WO2008125485A1 (fr) * 2007-04-13 2008-10-23 Valeo Termico S.A. Echangeur de chaleur pour gaz, et son procede de fabrication correspondant
EP2031338A3 (fr) * 2007-08-28 2013-08-14 Behr GmbH & Co. KG Echangeur thermique
US8881796B2 (en) 2007-08-28 2014-11-11 Behr Gmbh & Co. Kg Heat exchanger
US9897396B2 (en) 2007-08-28 2018-02-20 Mahle International Gmbh Heat exchanger
US10982908B2 (en) 2009-05-08 2021-04-20 Arvos Ljungstrom Llc Heat transfer sheet for rotary regenerative heat exchanger
US10197337B2 (en) 2009-05-08 2019-02-05 Arvos Ljungstrom Llc Heat transfer sheet for rotary regenerative heat exchanger
US11092387B2 (en) 2012-08-23 2021-08-17 Arvos Ljungstrom Llc Heat transfer assembly for rotary regenerative preheater
US10378829B2 (en) 2012-08-23 2019-08-13 Arvos Ljungstrom Llc Heat transfer assembly for rotary regenerative preheater
CN103104378A (zh) * 2012-11-12 2013-05-15 无锡双翼汽车环保科技有限公司 Egr冷却器芯体
WO2014167041A1 (fr) * 2013-04-11 2014-10-16 Spx Flow Technology Danmark A/S Échangeur de chaleur hygiénique
US10627169B2 (en) 2013-04-11 2020-04-21 Spx Flow Technology Danmark A/S Hygienic heat exchanger
CN105283730A (zh) * 2013-04-11 2016-01-27 斯必克流体技术丹麦公司 卫生型热交换器
US11885574B2 (en) 2013-04-11 2024-01-30 Spx Flow Technology Danmark A/S Hygienic heat exchanger
US10175006B2 (en) 2013-11-25 2019-01-08 Arvos Ljungstrom Llc Heat transfer elements for a closed channel rotary regenerative air preheater
US10094626B2 (en) 2015-10-07 2018-10-09 Arvos Ljungstrom Llc Alternating notch configuration for spacing heat transfer sheets
EP4206599A1 (fr) * 2021-12-30 2023-07-05 Robert Bosch GmbH Échangeur de chaleur, installation de traitement d'eau, pompe à chaleur

Also Published As

Publication number Publication date
KR20010102980A (ko) 2001-11-17
EP1154143A4 (fr) 2008-03-26
KR100709027B1 (ko) 2007-04-19
WO2000043662A1 (fr) 2000-07-27
JP2000213425A (ja) 2000-08-02

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