WO2011036105A1 - Corps de chauffe tubulaire et procédé de fabrication d'un tel corps de chauffe tubulaire - Google Patents

Corps de chauffe tubulaire et procédé de fabrication d'un tel corps de chauffe tubulaire Download PDF

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Publication number
WO2011036105A1
WO2011036105A1 PCT/EP2010/063728 EP2010063728W WO2011036105A1 WO 2011036105 A1 WO2011036105 A1 WO 2011036105A1 EP 2010063728 W EP2010063728 W EP 2010063728W WO 2011036105 A1 WO2011036105 A1 WO 2011036105A1
Authority
WO
WIPO (PCT)
Prior art keywords
silicone
tubular heater
insulating material
tubular
jacket
Prior art date
Application number
PCT/EP2010/063728
Other languages
German (de)
English (en)
Inventor
Manfred Schulz
Wolfgang Thimm
Original Assignee
E.G.O. Elektro-Gerätebau GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=43085906&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2011036105(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by E.G.O. Elektro-Gerätebau GmbH filed Critical E.G.O. Elektro-Gerätebau GmbH
Priority to ES10754932.1T priority Critical patent/ES2546510T3/es
Priority to PL10754932T priority patent/PL2481259T3/pl
Priority to EP10754932.1A priority patent/EP2481259B1/fr
Publication of WO2011036105A1 publication Critical patent/WO2011036105A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/42—Heating elements having the shape of rods or tubes non-flexible
    • H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material

Definitions

  • the invention relates to a tubular heater and a method for producing such a tubular heater.
  • tubular heaters are often used for example in electric heaters such as ovens to heat them.
  • electric heaters such as ovens
  • the trend is towards increasingly high operating temperatures, in particular for pyrolysis of the oven muffle, and, for reasons of energy efficiency, increasingly thicker thermal insulations.
  • This development means that the temperatures in the connection area of a tubular heater continue to rise.
  • the unheated length of the tubular heater could be increased.
  • the space inside the oven is very limited and a certain power is required, this is usually not.
  • the invention has for its object to provide a tubular heater mentioned above and a method for its production, which can be avoided with the problems of the prior art and especially allow higher temperatures in the connection area or at the connection section of a tubular heater.
  • the tubular heater has a tubular jacket and at least one heating conductor extending in the tubular jacket, wherein insulating material is provided therebetween, usually magnesium oxide or the like.
  • the heating conductor is provided in an attachment section of the tubular heater with an electrical connection, for example in a simple plug form.
  • the insulating material is mixed with silicone in the area of the connection section or contains silicone in order to prevent the penetration of water or moisture into the pipe jacket or into the pipe heater.
  • the silicone has an RTI value of at least 150.
  • the silicone has an RTI value of at least 200, particularly advantageously at least 220.
  • the RTI value (Relative Temperature Index) is a measure of the thermal aging resistance according to UL, which is as it were. - - the US VDE is. Normally used sealing qualities of silicone for electric tubular heaters have a maximum RTI value of 105.
  • a further advantage of the use of silicone with such a high RTI value is that hitherto used polymers or silicone crosslinkers for silicones from the low-temperature range can continue to be used.
  • the silicone may be in the form of an oil or resin and then introduced into the tubular heater to impregnate or coat the insulating material in the foremost region. It can be in polymer form. It may penetrate a few mm into the tubular heater, but should not penetrate too far, otherwise the operating temperature of the tubular heater is too high for the silicone, even at high RTI value. So it can be beneficial introduced or penetrate maximally 10mm deep. - -
  • such a silicone can advantageously be designed with respect to combustibility such that it has at least fire protection class HB, particularly advantageously even V-0.
  • a silicone crosslinker can be provided or it can be added.
  • the normal insulating material is introduced between the heating conductor and the tube jacket and then in the connection section just the special silicone. This can be solidified or cured or bonded during or after the introduction. Subsequently, a conventional insulating bead can be attached to the pipe jacket as a conclusion of the tubular heater, possibly even with a conventional sealant in between.
  • FIG. 1 a section through a tubular heater according to the invention is shown in Fig. 1.
  • the tubular heater 1 1 has a tube jacket 13, in which a coiled heating conductor 15 extends along the dash-dotted center longitudinal axis.
  • Pipe jacket 13 and heating element 15 are advantageously formed as from the prior - -
  • An intermediate space 17 between the heating conductor 15 and the tube jacket 13 is filled with an insulating material 18.
  • this insulating material may be in pulverulent or granular form and, for example, also be compressed in the tube jacket 13.
  • the tubular heater 1 1 is stable and the heating conductor 15 can by no means come into contact with the tube jacket 13.
  • connection portion 20 specifically where the tube shell 13 has an end 21 which is open to the left.
  • end 21 a likewise known per se Isolierperle 23 is introduced, advantageously made of plastic or ceramic material. It can be fixed or glued with an additional sealing compound 24 and be held centrally in the tube shell 13.
  • connection portion 20 with Isolierperle 23 and terminal pin 25 largely corresponds to the prior art.
  • the dashed lines to the top right illustrated insulating material 18 is present.
  • the insulating material 18 extends up to the sealing compound 24.
  • the insulating material 18 according to the invention the novel silicone mixed, so that a mixing region 28 is formed, which is shown diagonally dashed left above.
  • This silicone for the mixing area 28 is designed as described above, so it is a - called gangs silicone material and may be liquid or pasty. Thus it can be filled through the open end 21 of the tubular jacket 13 to mix with the granular insulating material 18 and, if necessary, cured.
  • the mixing region 28 with the silicone extends from the sealant 24 to the right into the tube jacket 13. If the sealing compound 24 is omitted, the mixing area 28 with the silicone can also be connected directly to the insulating bead 23. Furthermore, the mixing region 28 extends to the right until just before the connection of the connecting bolt 25 to the heating conductor 15 or the connecting region 26. However, this does not necessarily have to be the case.
  • the transition between the mixing region 28 and the region with the insulating material 18 without silicone right next to it is very abrupt or abrupt, namely as a line or as a boundary layer 29.
  • the length of the mixing region 28 may be a few mm, for example 10mm to 20mm or even 40mm
  • Examples of possibly used terminal insulation materials or corresponding silicones are from the manufacturer Wacker Chemie AG, Kunststoff, silicones with the designation ELASTOSIL A 234 or ELASTOSIL RT 772.
  • the first silicone has an RTI value of 150 and is in the fire protection class HB.
  • the second silicone even has an RTI value of 200 and is in the same fire protection class.
  • Dow Corning Corporation USA, has a 3120 silicone which has an RTI of 220 and is also in fire safety class HB.
  • the first and the third said silicone material is in liquid form, the second silicone material is pasty. All silicones can be on , ,

Landscapes

  • Resistance Heating (AREA)
  • Laminated Bodies (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

L'invention concerne un corps de chauffe tubulaire qui présente une enveloppe tubulaire et un conducteur chauffant qui s'étend dans l'enveloppe tubulaire, un matériau isolant étant prévu entre le conducteur chauffant et l'enveloppe tubulaire. Dans une partie de raccordement du corps de chauffe tubulaire, le conducteur chauffant est doté d'un raccordement électrique, le matériau isolant étant en cet emplacement mélangé avec du silicone spécial dont l'indice de température relative RTI est d'au moins 150 et avantageusement d'au moins 200. Le silicone empêche de manière générale la pénétration d'eau ou d'humidité et le silicone spécial à haut indice RTI présente une très bonne tenue à la chaleur.
PCT/EP2010/063728 2009-09-25 2010-09-17 Corps de chauffe tubulaire et procédé de fabrication d'un tel corps de chauffe tubulaire WO2011036105A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ES10754932.1T ES2546510T3 (es) 2009-09-25 2010-09-17 Calefactor tubular y método para la fabricación de dicho calefactor tubular
PL10754932T PL2481259T3 (pl) 2009-09-25 2010-09-17 Grzejnik rurowy i sposób wytwarzania takiego grzejnika rurowego
EP10754932.1A EP2481259B1 (fr) 2009-09-25 2010-09-17 Corps de chauffe tubulaire et procédé de fabrication d'un tel corps de chauffe tubulaire

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009048495.7 2009-09-25
DE102009048495A DE102009048495A1 (de) 2009-09-25 2009-09-25 Rohrheizkörper und Verfahren zur Herstellung eines solchen Rohrheizkörpers

Publications (1)

Publication Number Publication Date
WO2011036105A1 true WO2011036105A1 (fr) 2011-03-31

Family

ID=43085906

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2010/063728 WO2011036105A1 (fr) 2009-09-25 2010-09-17 Corps de chauffe tubulaire et procédé de fabrication d'un tel corps de chauffe tubulaire

Country Status (5)

Country Link
EP (1) EP2481259B1 (fr)
DE (1) DE102009048495A1 (fr)
ES (1) ES2546510T3 (fr)
PL (1) PL2481259T3 (fr)
WO (1) WO2011036105A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015102728A1 (de) 2015-02-25 2016-08-25 Eltra Heizelemente Gmbh Elektrischer Rohrheizkörper und Verfahren zum Herstellen des elektrischen Rohrheizkörpers

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015212916A1 (de) 2015-07-09 2017-01-12 E.G.O. Elektro-Gerätebau GmbH Kochfeld
EP4382807A1 (fr) 2022-12-09 2024-06-12 E.G.O. Elektro-Gerätebau GmbH Four de cuisson et procédé de fonctionnement d'un four de cuisson
DE102023201626A1 (de) 2023-02-22 2024-08-22 E.G.O. Elektro-Gerätebau GmbH Rohrheizkörper und Verfahren zur Herstellung eines Rohrheizkörpers

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1083450B (de) 1956-04-25 1960-06-15 Kanthal Ab Vorrichtung zum Einbringen von Pulver in das Mantelrohr eines Rohrheizkoerpers
DE4122657A1 (de) 1991-07-09 1993-01-14 Licentia Gmbh Feuchtigkeitsdichter abschluss fuer elektrische mantelrohrheizkoerper
FR2754128A1 (fr) * 1996-09-27 1998-04-03 Vulcanic Dispositif de chauffage electrique, procede de fabrication et radiateur ainsi equipe
EP0858084A1 (fr) * 1997-02-07 1998-08-12 I.R.C.A. S.p.a. Industria Resistenze Corazzate e Affini Procédé de fabrication d'éléments de résistance armés et élément de résistance obtenu par ce procédé
EP1296539A1 (fr) * 2001-09-21 2003-03-26 Seb S.A. Procédé de fabrication d'éléments chauffants

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1083450B (de) 1956-04-25 1960-06-15 Kanthal Ab Vorrichtung zum Einbringen von Pulver in das Mantelrohr eines Rohrheizkoerpers
DE4122657A1 (de) 1991-07-09 1993-01-14 Licentia Gmbh Feuchtigkeitsdichter abschluss fuer elektrische mantelrohrheizkoerper
FR2754128A1 (fr) * 1996-09-27 1998-04-03 Vulcanic Dispositif de chauffage electrique, procede de fabrication et radiateur ainsi equipe
EP0858084A1 (fr) * 1997-02-07 1998-08-12 I.R.C.A. S.p.a. Industria Resistenze Corazzate e Affini Procédé de fabrication d'éléments de résistance armés et élément de résistance obtenu par ce procédé
EP1296539A1 (fr) * 2001-09-21 2003-03-26 Seb S.A. Procédé de fabrication d'éléments chauffants

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
"Sheathed Heating Elements", MACHINE DESIGN, PENTON MEDIA, CLEVELAND, OH, US, vol. 36, no. 21, 10 September 1964 (1964-09-10), pages 193 - 198, XP001455120, ISSN: 0024-9114 *
See also references of EP2481259A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015102728A1 (de) 2015-02-25 2016-08-25 Eltra Heizelemente Gmbh Elektrischer Rohrheizkörper und Verfahren zum Herstellen des elektrischen Rohrheizkörpers

Also Published As

Publication number Publication date
ES2546510T3 (es) 2015-09-24
DE102009048495A1 (de) 2011-04-07
EP2481259A1 (fr) 2012-08-01
PL2481259T3 (pl) 2015-12-31
EP2481259B1 (fr) 2015-07-01

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