EP0352556A1 - Elément de chauffage électrique - Google Patents

Elément de chauffage électrique Download PDF

Info

Publication number
EP0352556A1
EP0352556A1 EP89112828A EP89112828A EP0352556A1 EP 0352556 A1 EP0352556 A1 EP 0352556A1 EP 89112828 A EP89112828 A EP 89112828A EP 89112828 A EP89112828 A EP 89112828A EP 0352556 A1 EP0352556 A1 EP 0352556A1
Authority
EP
European Patent Office
Prior art keywords
heating conductor
heating
stabilizing
electric heater
heater according
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Withdrawn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
EP89112828A
Other languages
German (de)
English (en)
Inventor
Svatopluk Krumnikl
Peter Ruppert
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.)
Braun GmbH
Original Assignee
Braun 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
Application filed by Braun GmbH filed Critical Braun GmbH
Publication of EP0352556A1 publication Critical patent/EP0352556A1/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
    • H05B3/16—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor the conductor being mounted on an insulating base

Definitions

  • the invention relates to an electric heating element for heating gaseous media with heating conductors arranged successively in several planes transversely to the flow direction of the medium to be heated, which are wound on plate-shaped supports made of insulating material which extend in the flow direction and are arranged in a cross or star shape, in the edge area Have cutouts to accommodate heating conductor turns.
  • Highly resilient electric radiators for heating gaseous media (DE-AS 1 440 381) are already known, which have meandering heating conductors lying in the flow path and running transversely to the direction of flow of the medium. These heating conductors are arranged in successive levels and are fixed in their position as holding elements by means of plates or openings having through openings.
  • the heating conductor carriers consist of two plates that are pushed on both sides over the comb-toothed loop tips or meandering heating conductors until they can be brought up to one another and attached to one another. The plates then lie in the middle of the radiator between the opposing, comb-toothed loop tips of the radiator.
  • the outer ends of the heating conductors are not fixed and can therefore swing freely. Depending on the mass of the free loop tips, there may be a risk that the oscillation will be greater than the distance between the heating conductors and that there will be a short circuit.
  • radiators are known with two star-shaped insulating plates of the type mentioned (DE-OS 26 44 093) around which a continuously wound coil made of elek trical resistance heating wire is wound with numerous, zigzag-shaped loops.
  • the longitudinal edges of the insulating material plate are provided with spaced-apart shoulders in which the tips of the bends of the resistance heating wire are fixed.
  • the heating conductor windings in the area of the heels are pressed with the insulating material plates.
  • Another form of defining the heating conductor turns at the deflection points of the insulating material support plate is that a layer of heat-resistant putty is applied to the support edges (DE-OS 28 49 629).
  • the individual heating conductor wire in the area between the neighboring insulating material plates can vibrate freely and can also be bent.
  • the invention has for its object to fix the heating conductor of an electric radiator with simple structural means so that contact with adjacent heating conductor wires is excluded even with a relatively large distance between adjacent support plates and relatively large heating conductor wire mass.
  • the object underlying the invention is achieved by the features listed in the characterizing part of claim 1. This reduces the free-floating mass of the heating conductor and prevents the mutual contact of the coils taking place in the case of strong air flow or, for example, when falling down or in luggage with the required compact and powerful design, i.e. with coils lying close together. Due to the advantageous fixing of the heating conductor or the individual turns, a very compact heating element, for example in a hairdryer, can be installed without having to arrange more support plates.
  • the shape of the stabilizing strips between the heating conductor tendons or the heating conductor tendon sections depends essentially on the course of the free heating conductor tendons between the heating conductor carrier plates. Possible solutions are conceivable in which only two adjacent heating conductor chord sections are supported by stabilizing strips. And it is also conceivable that all heating conductor chord sections lying between two carrier plates are supported in the transverse direction of the air flow by such stabilizing elements.
  • the shape and design of the stabilizing elements also crucially determine the form in which the stabilizing elements are fixed on the heating conductor chord sections or heating conductors or also in cooperation with the heating carrier plates. For this purpose, molded, fixed or bendable tabs or the like are attached directly to the stabilizing elements. conceivable.
  • a particularly advantageous form of fixation of the stabilizing elements is also obtained by deforming individual heating conductor chord sections or parts thereof such that the stabilizing elements are fixed by their deformation.
  • the particular advantages of the invention can be seen in the fact that, in particular in the case of high-performance electric radiators, relatively few heating conductor carrier plates can be used. This is particularly useful for even heat generation in the heating system conductors and of course also for the unimpeded flow of heat to the heating conductor with the medium to be heated.
  • the stabilizing strips ensure good fixation of the individual heating conductors in their free area, so that such radiators are protected against mechanical damage on the one hand and on the other hand in particular from vibrations etc. occurring, for example, due to the gas flow. It can therefore be excluded with great certainty that the heating conductor windings come into contact with one another during normal use and thus the risk of short circuits or the like. arises.
  • 10 denotes an electric radiator, which consists of numerous, nested, plate-shaped carriers 12 which are connected to one another in the middle by a holder 14.
  • a holder 14 In the exemplary embodiment according to FIG. 1, three nested supports 12 are provided. However, it is also possible to provide only two carriers or four or more carriers for receiving a heating conductor 16.
  • the heating conductor 16 runs zigzag or meandering with two or more deflection points concentrically between the individual support plates 12, so that tendon sections 20, 20 ', 20 ⁇ , 20 ′′′ form. Individual deflection points of the heating conductor 16 are placed on the outer edges 24 of the carrier 12 in recesses, so that a fixation, for example, every fourth deflection point of the concentrically wound heating conductor 10 is ensured.
  • a plurality of heating conductors 16 are arranged in different planes one behind the other in the flow direction of the medium to be heated. This arrangement is preferably made in a helical shape, that is to say a single heating conductor wire extends helically from one end of the heating element to the other end.
  • the stabilizing strip 30 is of rectangular design according to FIG. 2 and has numerous recesses 32 arranged in rows, which are elongated and are narrowed at the ends or tapered in each case.
  • the recess 32 corresponds in its length L1 approximately to the length L2 in the outer region of the deflection point 24 and in its width approximately to the heating conductor thickness.
  • the two opposite ends 34 of the recess 32 are formed by inclined, pointed ends, which enclose an angle of approximately 30 o . The angle formed between these sides can be larger or smaller. However, it should be dimensioned such that a perfect clamping of the stabilizing strips 30 on the tendons 20 of the heating conductor 16 or vice versa, a vibration-suppressing fixing of the heating conductor 16 in the recess is guaranteed.
  • the stabilizing strip 30 is provided with a central row of cutouts 32.
  • 2 can be provided in the side edges 40 wedge-shaped slots 32 ', 32 ⁇ , which in turn - like the sides 34 - include a wedge angle of 30 - 45 o .
  • the cutouts 32 correspond to a first row of heating conductors 16 on the periphery of their exposed tendon 20 between two adjacent support plates 12.
  • the slots 32 'and 32 ⁇ in the side edges 40 of the stabilizing strip 30 each encompass the adjacent rows of heating conductors and additionally stabilize them.
  • a plurality of tabs 42 which are arranged at a distance from one another and are designed as locking elements, and which are bent according to FIG. 1 by simply bending over the outer edges 24 of the supports 12, and thereby the stabilizing strips 30 in FIG. 1 Secure the position shown above so that only the outer ends 26 of the heating conductors protrude through the cutout 32 of the stabilizing strips 30.
  • This ensures a simple fixation of the stabilizing strips 30 on the carrier plates 12 and a fixation of the individual deflection points of the heating conductor 16, so that the individual heating conductors or the deflection points are not pressed against one another even when the flow rate is high or when there is mechanical action.
  • FIGS. 9 and 10 An alternative form of fixing the stabilizing strips 30 is shown in FIGS. 9 and 10.
  • the stabilizing strip 30 has in addition to the cutouts 32, 32 ', 32 ⁇ for the heating conductor chord sections 16 on its longitudinal edges as locking elements 43 formed as teeth. These locking teeth 43 can be snapped into grooves 14 in the outer edge region of the carrier plates 12.
  • the stabilizing strips 30 are clearly defined by this embodiment both in the longitudinal and in the transverse direction; On the one hand, the free heating conductor chord sections 16 are stabilized by this determination. On the other hand, it is also achieved without further measures that the heating conductor 16 itself no longer has any possibility of movement in its edge region running in the region of the carrier plate 12. Not only are the individual heating conductor chord sections held in their position in the flow direction and in the transverse flow direction, but also the entire heating conductor construction is clearly defined on the carrier plate green construction.
  • a fixation of the individual stabilizing strips 30 can also be ensured in that some of the deflection points passing through the recesses 32 of the plates are bent outwards or pressed flat (see e.g. Fig. 4).
  • a further fastening possibility of the stabilizing strips 38 can be achieved by providing spacer tabs 44 which protrude beyond the heating conductor parts projecting beyond the stabilizing strips 38 by the same amount as the cutouts for the heating conductors in the plates 12. These tabs 44 can then attach themselves support the inner wall of a heating receiver cylinder 50 (see FIG. 7).
  • FIG. 8 A further locking of a stabilizing element 30 on the heating conductor tendons 20 of a heating conductor 16 is shown in FIG. 8.
  • one or more locking elements are integrally formed on the end edges 41 of a stabilizing element 30 corresponding to the winding openings of tendon sections 20.
  • these locking elements are selected as wedge-shaped lugs 46.
  • Recesses 32 and locking elements 42, 44 and 46 are - for the person skilled in the art of course - to be selected such that the function of the stabilizing elements 30 (fixing the heating conductor tendons 20 against vibrations or mechanical action) can be achieved without further notice.
  • the heating conductor arrangement The easiest way to select the most appropriate and compatible form with the carrier plate construction - for example during assembly but also in use - for example from the exemplary embodiments listed above, but also from a large number of other conceivable embodiments.

Landscapes

  • Resistance Heating (AREA)
EP89112828A 1988-07-27 1989-07-13 Elément de chauffage électrique Withdrawn EP0352556A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8809561U DE8809561U1 (de) 1988-07-27 1988-07-27 Elektroheizkörper
DE8809561U 1988-07-27

Publications (1)

Publication Number Publication Date
EP0352556A1 true EP0352556A1 (fr) 1990-01-31

Family

ID=6826343

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89112828A Withdrawn EP0352556A1 (fr) 1988-07-27 1989-07-13 Elément de chauffage électrique

Country Status (2)

Country Link
EP (1) EP0352556A1 (fr)
DE (1) DE8809561U1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0495555A1 (fr) * 1991-01-18 1992-07-22 CARMA S.n.c. di Carlo e Mauro LABIRIO Système d'ancrage pour fil ou bande chauffants sur des plaques ou supports isolés dans des resistances éléctriques pour grille-pain, équipement à repasser et analogue
GB2335833A (en) * 1998-03-25 1999-09-29 Redring Electric Ltd Support for coiled wire heating element
US6864467B2 (en) 2002-11-09 2005-03-08 Eichenauer Heizelemente Gmbh & Co. Kg Heater for gaseous media

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202005021917U1 (de) * 2005-03-19 2011-05-05 Eichenauer Heizelemente Gmbh & Co. Kg Luftheizer

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1440381C (de) * Fa. Fritz Eichenauer, 6747 Kandel Hochbelastbarer Elektroheizkörper
DE2644093A1 (de) * 1976-09-30 1978-04-06 Eichenauer Fa Fritz Heizkoerper mit zumindest einer isolierstoffplatte und einer um diese fortlaufend gewundenen wendel
DE2849629A1 (de) * 1978-11-16 1980-05-22 Eichenauer Fa Fritz Elektrischer heizkoerper fuer fluide medien
DE3014935A1 (de) * 1980-04-18 1981-10-22 Braun Ag, 6000 Frankfurt Elektrisches drahtheizelement

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB212686A (en) * 1923-01-10 1924-03-20 Superheater Co Ltd Improvements in or relating to boilers with superheaters
DE1440381B2 (de) * 1960-07-02 1970-03-19 Fa. Fri*z Eichenauer, 6747 Kandel Hochbelastbarer Elektroheizkörper
US3691348A (en) * 1971-10-06 1972-09-12 Gen Electric Heating element assembly
FR2329131A1 (fr) * 1975-10-22 1977-05-20 Cepem Perfectionnement a la mise en place de resistances en spirale tendues entre deux supports isolants
DE2843366C2 (de) * 1977-10-07 1985-10-10 The Gillette Co., Boston, Mass. Elektrischer Heizkörper

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1440381C (de) * Fa. Fritz Eichenauer, 6747 Kandel Hochbelastbarer Elektroheizkörper
DE2644093A1 (de) * 1976-09-30 1978-04-06 Eichenauer Fa Fritz Heizkoerper mit zumindest einer isolierstoffplatte und einer um diese fortlaufend gewundenen wendel
DE2849629A1 (de) * 1978-11-16 1980-05-22 Eichenauer Fa Fritz Elektrischer heizkoerper fuer fluide medien
DE3014935A1 (de) * 1980-04-18 1981-10-22 Braun Ag, 6000 Frankfurt Elektrisches drahtheizelement

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0495555A1 (fr) * 1991-01-18 1992-07-22 CARMA S.n.c. di Carlo e Mauro LABIRIO Système d'ancrage pour fil ou bande chauffants sur des plaques ou supports isolés dans des resistances éléctriques pour grille-pain, équipement à repasser et analogue
GB2335833A (en) * 1998-03-25 1999-09-29 Redring Electric Ltd Support for coiled wire heating element
US6864467B2 (en) 2002-11-09 2005-03-08 Eichenauer Heizelemente Gmbh & Co. Kg Heater for gaseous media

Also Published As

Publication number Publication date
DE8809561U1 (de) 1988-12-08

Similar Documents

Publication Publication Date Title
EP0585831B1 (fr) Elément chauffant, en particulier pour appareils de cuisine
EP1061776A1 (fr) Dispositif de chauffage destiné au réchauffement de l'air
DD274317A5 (de) Vorrichtung zur halterung von anschlussleisten der fernmeldetechnik
EP0333906B1 (fr) Résistance chauffante à coefficient de température positif
DE2644093A1 (de) Heizkoerper mit zumindest einer isolierstoffplatte und einer um diese fortlaufend gewundenen wendel
LU82791A1 (de) Elektrisches widerstandsheizelement
EP0352556A1 (fr) Elément de chauffage électrique
DE2830532A1 (de) Elektrischer heizkoerper fuer fluide medien
EP0254770B1 (fr) Dispositif de contact électrique
DE2659307C3 (de) Elektrischer Heizkörper für gasförmige Medien
GB2039155A (en) Electric resistance unit
DE69404078T2 (de) Widerstandselement für Leistungswiderstand
DE2530369C3 (de) Elektrischer Heizkörper
EP0289707B1 (fr) Elément chauffant électrique avec prise
DE2500223C3 (de) Elektrisches Widerstandsgerät
DE19505930A1 (de) Elektrisches Widerstandsheizelement zum Erwärmen eines gasförmigen Mediums
EP1418794B1 (fr) Dispositif de chauffage pour gaz
DE3204273C2 (de) Kontaktelement zur Zwischenlage zwischen wärmeleitende Teile eines Gerätes, insbesondere eines Gehäuses für eine elektrische Baugruppe
DE2608109A1 (de) Keramischer kaltleiter
DE2533934A1 (de) Elektrischer heizkoerper fuer warmluftgeraete o.dgl.
DE19510300C1 (de) Elektrischer Heizkörper für gasförmige Medien
DE2849258A1 (de) Elektrischer heizkoerper fuer fluide medien
DE3631852C1 (de) Elektrischer Heizkoerper,insbesondere fuer Brotroester
DE1440381B2 (de) Hochbelastbarer Elektroheizkörper
DE2138709B2 (de) Heizköprer für gebläsebetriebene Heizgeräte

Legal Events

Date Code Title Description
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

17P Request for examination filed

Effective date: 19891128

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT CH ES IT LI NL

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

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Withdrawal date: 19920605