EP0204850A1 - Elément chauffant tubulaire - Google Patents

Elément chauffant tubulaire Download PDF

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Publication number
EP0204850A1
EP0204850A1 EP85106967A EP85106967A EP0204850A1 EP 0204850 A1 EP0204850 A1 EP 0204850A1 EP 85106967 A EP85106967 A EP 85106967A EP 85106967 A EP85106967 A EP 85106967A EP 0204850 A1 EP0204850 A1 EP 0204850A1
Authority
EP
European Patent Office
Prior art keywords
tubular
housing
rod
heating element
shaped element
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Withdrawn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
EP85106967A
Other languages
German (de)
English (en)
Inventor
Ingo Dr. Mont. Dipl.-Ing. Bleckmann
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.)
ELPAG AG CHUR
Original Assignee
ELPAG AG CHUR
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 ELPAG AG CHUR filed Critical ELPAG AG CHUR
Priority to EP85106967A priority Critical patent/EP0204850A1/fr
Publication of EP0204850A1 publication Critical patent/EP0204850A1/fr
Withdrawn legal-status Critical Current

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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 according to the features of the preamble of claim 1 and a method for producing the same.
  • a temperature protection switch for a tubular heating element having a heating wire coil has become known, which is accommodated in a housing which is in a closely thermally conductive connection with the outer tube of a tubular heating element, the housing being provided with connecting elements for connecting the heating wire coil, which are designed as connecting bolts on which the heating wire coils can be pushed.
  • the heating wire coils have to be pushed onto the connecting bolts before the tubular heating element is manufactured and welded to them to produce an intimate electrical contact.
  • the arrangement is then inserted into a jacket tube which is filled with magnesium oxide.
  • the tubular heating element must then be rolled to compress the insulating material, with the risk that the housing of the thermal protection switch is compressed and this is destroyed. This danger is particularly great when on both front ends locking bolts of the housing filaments are attached, since then the rolling process must extend to the area of both filaments.
  • rollers are often automatically controlled to achieve a certain lengthening of the tubular heating element, namely one that ensures that all tubular heating elements, regardless of how tight the filling with insulating material is, after the manufacturing process has the same length, can destroy the Do not avoid thermal circuit breakers.
  • Another major disadvantage of the known arrangement is that smaller series have to be manufactured and kept in stock, namely series which do not contain temperature switches and those which, depending on the type of device to be fitted, must have temperature switches with different response values.
  • a tubular heater manufactured for a particular washing machine has a different heat response value than a tubular heater of the same power, which, for. B. is intended for a dishwasher.
  • Subsequent retrofitting is no longer possible, since when the housing is pulled out with the temperature sensor, the heating coil is pulled out with appropriate expansion and elongation or the heating coil tears off the connecting bolt. If a different temperature sensor were used, it could be used with the heating can no longer be electrically connected, since this is embedded in insulating material and welding work in the tubular heater cannot be carried out due to lack of accessibility.
  • the invention is based on the object of designing a tubular heater of the type in question in such a way that it can be finished without the temperature switch, that is to say it can also be rolled, after which temperature switches with the desired response values are later inserted into the tubular heater end or temperature switches already inserted can be exchanged for those with a different response value.
  • a tubular heating element contains a heating coil 2 embedded in insulating compound 1, which is welded to a rod-shaped element 3 likewise embedded in insulating compound 1.
  • the insulating compound 1 is compressed in a conventional manner in a jacket tube 4.
  • a tubular housing 6, preferably made of insulating material, is inserted, which has a thermal protection switch 7 of any type, e.g. B. in the form of a bimetallic switch, a fuse or a temperature sensor, for example in the form of a PTC element, ie has a resistance element with a positive temperature gradient.
  • the Rohrför Mige housing 6 is closed at its ends with preferably metallic and a disc-shaped end elements 8 and 9, wherein the insulating material 1 facing and preferably adjacent to this end element 9 contains a hole 11, which detachably receives the free end of the rod-shaped element 3.
  • the hole 11 is surrounded by resilient contact elements 12 which extend into the interior of the tubular housing 6. If the closure element 9 consists of a metal disc, the contact elements 12 can be pressed out in the form of "pull-throughs" when the hole 11 is made.
  • the other connecting element 8 receives a connecting bolt 13 which, depending on the device to be charged with the tubular heater, can also be designed in the form of a connecting lug.
  • the end of the casing tube 4 can still be closed with a conventional seal 14.
  • the terminating elements 8 and 9 are electrically connected to one another via the thermal protection switch 7, the voltage supply being interrupted when the tubular heating element overheats by opening the temperature protection switch 7.
  • the rod-shaped GE element 3 and the connecting bolt 13 are connected directly to one another by electrical connection of the end elements 8 and 9.
  • the connecting bolt 13 can then be tubular, in which case connecting elements for the temperature sensor are then accommodated in the hollow space of the tube.
  • the voltage is then switched off, at both connection poles of the tubular heater, via an electronic circuit which is integrated in the device to be fitted and which can monitor other temperature-sensitive points on the device.
  • the electronic circuit responds to the change in the ohmic resistance of the temperature sensor with increasing heating.
  • the embodiment shown has the particular advantage that direct metallic heat conduction from the heating coil 2 via the rod-shaped element 3 and the metallic end element 9 to the bimetallic element 7 is ensured, which is shown broken off in FIG. 1 for reasons of clarity, but depending on the construction of the bimetal switch can be connected in a heat-conducting manner to the terminating element 9. Since the end of the tubular heater is generally free from calcification and contamination, there is a precisely defined radial heat flow over the jacket tube 4, which is independent of the installation position of the tubular heater. This ensures an exact response of the thermal protection switch when a certain temperature of the heating coil 2 is exceeded.
  • Figures 2 to 4 show a preferred manufacturing process.
  • This tubular heating element can, if no thermal protection switch appears necessary for other reasons, continue to be used in this form, with the rod-shaped element 3 then serving as a connecting element.
  • the insulating compound 1 is removed from the front end of the tubular casing 4, so that a free space 5 is created. 4, the rod-shaped element 3 is then shortened. Now the tubular housing 6, which contains a thermal protection switch or a temperature sensor, can be inserted, the projecting end of the rod-shaped element 3 in the hole 11 of the end side termination 9 of the housing penetrates with appropriate good electrical contact with the contact elements 12th
  • tubular heater it is also possible at any time to convert the tubular heater to a thermal circuit breaker with a different response value, in which case the tubular housing 6 with the connecting bolt 13 is pulled out of the end of the tubular heater and replaced by a similar device with a different response value. It is also possible to convert to a temperature sensor for devices with an electronic circuit.
  • tubular connecting bolts 15 are provided.
  • a bimetallic switch 20 designed as a snap switch is accommodated in the housing 6.
  • Such switches have a bowl-shaped or curved bimetallic element, which jumps over when a certain temperature is reached, so that switching off without arcing is ensured.
  • a restart is ensured by a rod-shaped element 16 accommodated in the connecting bolt, which element is pressed in against spring force and thereby actuates the schematically indicated switch of the snap switch 20.
  • the housing 6 takes a temperature sensor 18 z.
  • B. in the form of PTC elements, ie resistance elements, the resistance of which increases with increasing temperature. Lines are led through the tubular connecting bolt 15, which lead to an electronic switching element 19 which, in the event of overheating, switches off the two supply lines (not shown) leading to the two tubular heater ends.
  • the embodiment is particularly for devices such. B. washing machines, suitable in which the electrical switching element 19 is present anyway, for. B. to monitor the temperature of the wash liquor or dry air.

Landscapes

  • Resistance Heating (AREA)
EP85106967A 1985-06-05 1985-06-05 Elément chauffant tubulaire Withdrawn EP0204850A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP85106967A EP0204850A1 (fr) 1985-06-05 1985-06-05 Elément chauffant tubulaire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP85106967A EP0204850A1 (fr) 1985-06-05 1985-06-05 Elément chauffant tubulaire

Publications (1)

Publication Number Publication Date
EP0204850A1 true EP0204850A1 (fr) 1986-12-17

Family

ID=8193547

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85106967A Withdrawn EP0204850A1 (fr) 1985-06-05 1985-06-05 Elément chauffant tubulaire

Country Status (1)

Country Link
EP (1) EP0204850A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5020128A (en) * 1987-11-30 1991-05-28 Ingo Bleckmann Tubular sheathed electric heater with an overheat safety device
EP0456216A2 (fr) * 1990-05-08 1991-11-13 Elpag Ag Chur Elément chauffant tubulaire avec fusible
WO1992008331A1 (fr) * 1990-10-25 1992-05-14 Backer Elektro-Värme Ab Element de chauffage electrique tubulaire et regulateur de temperature pour l'element
FR2681496A1 (fr) * 1991-09-17 1993-03-19 Vulcanic Elements chauffants blindes a alimentation electrique, et procede de fabrication de tels elements.
EP0621738A2 (fr) * 1993-04-23 1994-10-26 E.G.O. Elektro-Geräte Blanc und Fischer GmbH & Co. KG Dispositif de sécurité pour un élément de chauffage électrique contre une réduction inadmissible du transfer de chaleur
DE29707829U1 (de) * 1997-05-01 1997-07-10 Tovarna Elektrotermicnih Aparatov Eta Cerkno D.O.O., Cerkno Rohrheizkörper mit eingebauter Überhitzungssicherung
WO2000066959A1 (fr) * 1999-04-28 2000-11-09 I.R.C.A. S.P.A. - Industria Resistenze Corazzate E Affini Element a resistance pour le degivrage d'evaporateurs dans des unites de refrigeration
DE102009029251A1 (de) * 2009-09-08 2011-03-24 BSH Bosch und Siemens Hausgeräte GmbH Gargeräterohrheizkörper
DE102017207738A1 (de) * 2017-05-08 2018-11-08 Mahle International Gmbh Elektrische Heizeinrichtung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH363735A (fr) * 1960-10-18 1962-08-15 Merlin Mouldings Limited Elément de chauffage électrique
DE2101062A1 (de) * 1971-01-11 1972-07-27 Tuerk & Hillinger Kg Elektrischer Rohrheizkörper mit Temperaturbegrenzer
FR2167674A1 (fr) * 1972-01-12 1973-08-24 Elpag Ag Chur
GB2098436A (en) * 1981-05-07 1982-11-17 Ti Russell Hobbs Ltd Electrical heating element
EP0086465A1 (fr) * 1982-02-12 1983-08-24 Elpag Ag Chur Corps de chauffe tubulaire muni d'un coupe-circuit de surcharge

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH363735A (fr) * 1960-10-18 1962-08-15 Merlin Mouldings Limited Elément de chauffage électrique
DE2101062A1 (de) * 1971-01-11 1972-07-27 Tuerk & Hillinger Kg Elektrischer Rohrheizkörper mit Temperaturbegrenzer
FR2167674A1 (fr) * 1972-01-12 1973-08-24 Elpag Ag Chur
GB2098436A (en) * 1981-05-07 1982-11-17 Ti Russell Hobbs Ltd Electrical heating element
EP0086465A1 (fr) * 1982-02-12 1983-08-24 Elpag Ag Chur Corps de chauffe tubulaire muni d'un coupe-circuit de surcharge

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5020128A (en) * 1987-11-30 1991-05-28 Ingo Bleckmann Tubular sheathed electric heater with an overheat safety device
EP0456216A2 (fr) * 1990-05-08 1991-11-13 Elpag Ag Chur Elément chauffant tubulaire avec fusible
EP0456216A3 (en) * 1990-05-08 1992-08-05 Elpag Ag Chur Tubular heating element with fuse
WO1992008331A1 (fr) * 1990-10-25 1992-05-14 Backer Elektro-Värme Ab Element de chauffage electrique tubulaire et regulateur de temperature pour l'element
FR2681496A1 (fr) * 1991-09-17 1993-03-19 Vulcanic Elements chauffants blindes a alimentation electrique, et procede de fabrication de tels elements.
EP0621738A3 (fr) * 1993-04-23 1994-12-14 Ego Elektro Blanc & Fischer Dispositif de sécurité pour un élément de chauffage électrique contre une réduction inadmissible du transfer de chaleur.
EP0621738A2 (fr) * 1993-04-23 1994-10-26 E.G.O. Elektro-Geräte Blanc und Fischer GmbH & Co. KG Dispositif de sécurité pour un élément de chauffage électrique contre une réduction inadmissible du transfer de chaleur
DE29707829U1 (de) * 1997-05-01 1997-07-10 Tovarna Elektrotermicnih Aparatov Eta Cerkno D.O.O., Cerkno Rohrheizkörper mit eingebauter Überhitzungssicherung
WO2000066959A1 (fr) * 1999-04-28 2000-11-09 I.R.C.A. S.P.A. - Industria Resistenze Corazzate E Affini Element a resistance pour le degivrage d'evaporateurs dans des unites de refrigeration
DE102009029251A1 (de) * 2009-09-08 2011-03-24 BSH Bosch und Siemens Hausgeräte GmbH Gargeräterohrheizkörper
DE102009029251B4 (de) * 2009-09-08 2015-02-12 BSH Bosch und Siemens Hausgeräte GmbH Gargeräterohrheizkörper
DE102017207738A1 (de) * 2017-05-08 2018-11-08 Mahle International Gmbh Elektrische Heizeinrichtung
US10780762B2 (en) 2017-05-08 2020-09-22 Türk & Hillinger Automotive GmbH Electrical heating device

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Inventor name: BLECKMANN, INGO, DR. MONT. DIPL.-ING.