EP1418794B1 - Dispositif de chauffage pour gaz - Google Patents

Dispositif de chauffage pour gaz Download PDF

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Publication number
EP1418794B1
EP1418794B1 EP03025389A EP03025389A EP1418794B1 EP 1418794 B1 EP1418794 B1 EP 1418794B1 EP 03025389 A EP03025389 A EP 03025389A EP 03025389 A EP03025389 A EP 03025389A EP 1418794 B1 EP1418794 B1 EP 1418794B1
Authority
EP
European Patent Office
Prior art keywords
heating wire
electric heater
heater according
support plate
support plates
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.)
Expired - Lifetime
Application number
EP03025389A
Other languages
German (de)
English (en)
Other versions
EP1418794A1 (fr
Inventor
Jürgen Stritzinger
Norbert Kern
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.)
Eichenauer Heizelemente GmbH and Co KG
Original Assignee
Eichenauer Heizelemente GmbH and Co KG
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 Eichenauer Heizelemente GmbH and Co KG filed Critical Eichenauer Heizelemente GmbH and Co KG
Publication of EP1418794A1 publication Critical patent/EP1418794A1/fr
Application granted granted Critical
Publication of EP1418794B1 publication Critical patent/EP1418794B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H05B3/10—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
    • 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
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/022—Heaters specially adapted for heating gaseous material

Definitions

  • the invention relates to an electric radiator for gaseous media with at least one support plate and at least a helix of a corrugated electrical resistance heating wire, which wound continuously around the support plate is and whose turns by means of bends of the Heating wire held on the longitudinal edges of the support plate are.
  • a radiator in which a heating wire around one or two parallel elongated support plates is wound in the form of insulating panels, wherein the heating wire by means of a press on both sides so pressed against the edges of the insulating panels, that bends arise, the plate edges clip-like include.
  • a disadvantage of this embodiment is that the heating wire in the area of this bracket-like Bends due to its investment in the insulating panels gets too hot and starts to glow, reducing the life is severely impaired.
  • the Heating wire based on a longitudinal extension of the insulating panels no sufficient length; for a high heat output to provide.
  • the invention is based on the object, a generic to create electric radiator that is for generating and to deliver the required heating power sufficient Has heating wire length, wherein the heating wire should heat relatively evenly over its entire length, in this way, overheating places too avoid, so that the radiator of the invention a long life possesses.
  • the design should be special be suitable for transversely flowed radiator.
  • the heating wire is arranged such that it only Longitudinal sides and / or edges of the longitudinal narrow sides of Carrier plate touched and in the area of a convex bend is guided over the longitudinal narrow sides of the support plate, wherein the bending angle between both sides of the bend subsequent areas of the heating wire is greater than 40 °.
  • this statement refers to those Longitudinal edges adjacent bends and their adjacent Areas in supported by a support plate state of the Heating wire.
  • the bending angle is essential greater than 40 °, for example greater than 60 °.
  • the bending angle ⁇ is below 120 °, so that he in an extremely preferred embodiment at about 90 ° - 100 °. In this way, a flat Concern of the heating wire to the support plates in the area of Prevented edges, so it's not at this point too Overheating and therefore to damage of the heating wire comes.
  • the heating wire - for example, at regular intervals - in addition to between wave mountains and corresponding troughs arranged straight flanks has more straight sections, one opposite possess the flanks enlarged length. Preferably these straight sections at least twice as long as the Flanks. In this way, the heating wire moves away carried around the longitudinal narrow side of the support plate in its further course increasingly from the outside, so that overheating is effectively avoided. This is particularly advantageous for cross-flow radiators.
  • the inventive Radiator when using several päralleler Support plates without spacers or the like. Between the Support plates and without additional fastening devices get by for the heating wire to the support plates.
  • the straight Sections are substantially tangent to the turns extend the helix so that the heating wire in transition areas between straight and wavy sections to the Longitudinal edges of the support plates is held. This will be the support plates through the heating wire in their relative position fixed, so in an advantageous manner to additional Spacers between the plates are dispensed with can.
  • Radiator is provided that the heating wire when using a plurality of support plates in one area between the support plates a regular wave pattern comprising wave crests and troughs. Thereby wins the heating wire in this area to (inherent) stability and also has a opposite to a straight course increased length, resulting in improved heat dissipation results.
  • the radiator according to the invention sees before that the heating wire between at opposite Longitudinal sides adjacent straight sections has at least one other wave trough, whose vertex abuts on an outer side of the support plate.
  • the support plate only point-like heating wire wins the radiator according to the invention in addition to stability, without deteriorating the thermal properties.
  • a particularly preferred Embodiment of the radiator according to the invention before that the heating wire between at opposite ends Longitudinal sides adjacent straight sections two troughs has and that the heating wire in a section formed between them with a substantially M-shaped course is.
  • the heating wire touches it no place the outside of the support plate. In such a Design is a large heating wire length without Danger of local overheating and thus optimal Utilization of the available space guaranteed.
  • this one double or multiple helix in the form of at least two parallel wound Has heating wires This can be different Produce heating stages, so that the radiator of the invention is particularly flexible. Alternatively or In addition, this is also done by intermediate taps along the To realize heating coil.
  • a development of the radiator according to the invention sees that when using multiple support plates in one area arranged between the support plates, a temperature element is.
  • a temperature element arranged can be particularly fast and sensitive to a thermal Condition of the radiator of the invention react and also contributes to optimal utilization of the available standing space at.
  • the support plate Has breakthroughs in the coil. This favors on the one hand, the training of a purpose of improved heat dissipation desired turbulent flow, on the other hand can in the Area of such breakthrough the above Temperature element can be arranged.
  • the heating wire of the invention Radiator a PTC characteristic on; the at rising Temperatures increase the resistance of the Heating wire leads. This makes it possible for high initial benefits a self-regulating temperature protection provided.
  • a combination of conventional heating wire and PTC heating wire, in particular in parallel winding of two heating wires, is also suitable, the high Initial power and thus limit the power.
  • Radiator is provided that this one longitudinally the support plate variable number of Schwarzdrahtwicklitch per unit length. It is possible, the number of turns not constant over the entire winding length but in adaptation to the flow conditions variable. This is especially true for one Tangential blower advantageous because here on the radiator length different flow velocities of form gaseous medium.
  • an electrical resistance of the Radiator is customizable.
  • Radiator provided that this one between Having the support plates guided return conductor.
  • Figs. 1a and 1b show the front and sectional views an electric heater 1 in a cross-section rectangular housing 2, by a current P of a to be heated gaseous medium, such as air, is interspersed, for example across to its extension.
  • a current P of a to be heated gaseous medium such as air
  • a to be heated gaseous medium such as air
  • two parallel support plates 3a, 3b in the form of Insulating panels arranged in lateral openings 4a, 4b of the housing 2 are held.
  • bifilar two resistance heating wires 5a, 5b helical wound To the two Insulating plates 3a, 3b are in the illustrated embodiment bifilar two resistance heating wires 5a, 5b helical wound.
  • a heating wire or more than two heating wires available be.
  • the heating wires 5a, 5b are at their ends by contact parts 6, 6 'held on the insulating plates 3a, 3b attached and through the lateral openings 4a, 4b of the Housing are led to the outside, being at the same time represent the electrical connections for the heating wires 5a, 5b.
  • a Temperature element consisting of fuse 21 and temperature sensor 22, provided.
  • Fig. 1b shows in a sectional view accordingly Ib-Ib in Fig. 1a, a first winding guide of the heating wires 5a, 5b around the support plates 3a, 3b. Due to the inherent stability the heating wires 5a, 5b, their particular configuration explained below with reference to FIGS. 1c, 2 and 3a is, are between the support plates 3a, 3b no Spacers or the like required. In addition, will the entire space within the housing 2 exploited to in this way over an increased length of the heating wires 5a, 5b provide a high heating power available can.
  • FIG. 1c A first embodiment of a heating wire for a radiator according to the invention is shown in Fig. 1c (see below Fig. 3a).
  • the heating wire 5 (in Fig. 1c unwound and partially shown) in sections 11 is a regular wave pattern of wave crests 11a and troughs 11b. Between the corresponding Vertexes of the wave peaks 11a and troughs 11b extend essentially straight flanks 11c.
  • the sections 11 ends on both sides in a bend 12 whose bending angle ⁇ substantially greater than 40 °, in the embodiment shown preferably about 90 °.
  • the heating wire 5 described above with reference to FIG. 1c is further down in Fig. 3a in wound state shown and comes with a radiator according to the invention according to the Fig. 3b used.
  • Fig. 2 shows the side view of a turn of a Heating wire 5 corresponding to the heating wires 5a, 5b according to Fig. 1a and 1b, which differs from the above-described embodiment differs according to the Fig. 1c in partial areas.
  • every single heating wire winding has the same wave pattern on. But there are also different ones Pattern feasible.
  • the wave pattern shown in Fig. 2 has the heating wire winding in sections 11 between the insulating plates 3a, 3b a substantially regular wave pattern according to Fig. 1c, wherein the bends 12 on the narrow sides 20 of the insulating panels 3a, 3b are positioned.
  • the bending angle ⁇ of the turn 12 is about 100 °.
  • the two sides in the area from outsides 14 of the insulating plates 3a, 3b to the Sections 11 subsequent substantially straight sections 13 of the heating wire 5 are due to the helical shape of the heating wire substantially tangential to Bankdrahtwicklung arranged.
  • the insulating plates 3a, 3b are - as mentioned - with their narrow sides 20th and their edges 20a in the convex bends 12 in FIG Transition region between the corrugated sections 11 and the straight sections 13 of the heating wire 5 and are characterized also fixed without housing in their relative position, what the handling of the radiator according to the invention essential facilitated.
  • the straight sections 13 each end as in Fig. 1c in another convex bend 16 on which a concave Turn 17 (wave trough) follows. More straight sections 18 lead the heating wire 5 in two excessive Wellenbergen.19 centered together, with the heating wire 5 in this section due to the wave crests 19 and the straight sections 18 has an M-shape.
  • the stability of the heating wire arrangement in particular against in the direction of the double arrow 11 acting lateral forces ensures so that the radiator 1 according to the invention according to 1a without additional stabilizing elements (spacers) gets along.
  • the just described embodiment of Bankdrahtwicklungen on the one hand has the advantage that through the straight section 13 in the region of the outer side 14 of the plates 3a, 3b a resting or approaching of the heating wire 5 on the or to the outer sides 14 of the insulating plates 3a, 3b prevented is and instead of the heating wire 5 only point-like on the narrow sides 20 and / or their edges 20a on the plates 3a, 3b rests. This will reliably a Overheating of the heating wire 5 in the edge region of the plates 3a, 3b prevented.
  • this version uses by the excessive wave crests 19 optimally to her Available space in the housing 2 from (see Fig. 1b).
  • the wave pattern can also be other, to the concrete Requirements adapted, embodiments, which in addition, from winding to winding along the Can change support plates 3a, 3b.
  • FIGs. 3a and 3b show views of a substantially the embodiment of the shown in Fig. 1c Schudrahts 5 corresponding simpler embodiment of the Schudrahtwindungen. It is preferably used when the height of the housing 2 for reasons of space significantly lower must be as in the previous example of FIG. 2 or 1b.
  • the Heating wire 5 running in regular waves.
  • the bending angle ⁇ of the turn 12 about 100 °.
  • Fig. 4 shows a plan view of the insulating panels 3a, 3b of the radiator 1 according to the invention in this exemplary embodiment are at the longitudinal edge of the insulating panels 3a, 3b grooves 8 formed in the Heating wire 5a, 5b is inserted during winding and thereby secured against lateral displacement.
  • the plates have openings 10, by tabs the contact parts 6 are penetrated and for a clamping attachment of the contact parts 6 to the plates 3a, 3b. More tabs 7 of the contact parts 6 hold the Ends of the heating wires 5a, 5b, the fuse 21 and the temperature sensor 22 (Fig. 1a).
  • Fig. 5 shows an embodiment of the invention Radiator with unilateral connections on the left Side, in which a return conductor 24 of the heating wire 5 as conductive wire connection between the right and left side Contact parts 6 of the upper plate 3a spaced therefrom between the plates 3a, 3b is guided. at the same time is in the return line 24, a temperature element in the form a fuse 21 and a temperature sensor 22 integrated.
  • the return conductor 24 is the helical 5 especially around two plates advantageous, since here between the plates 3a, 3b sufficient Space for the temperature element 21, 22 is present.
  • the position of the temperature sensor 22 is thus freely selectable.
  • Fig. 6 shows a cross section similar to that of Fig. 1b with arranged in a rectangular in a rectangular housing 2 electric radiator 1.
  • the housing 2 has two arranged parallel to each other gas or air guide walls 2a, which is substantially parallel to the Gas or air flow P are aligned.
  • the radiator 1 is arranged in the housing 2a such that in the flow direction P the support plates 3a, 3b to the guide walls 2a are inclined and in the illustrated embodiment a Include angle ⁇ of about 10 °.

Landscapes

  • Resistance Heating (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • General Induction Heating (AREA)

Claims (20)

  1. Corps de chauffe électrique pour fluides gazeux comprenant au moins une plaque d'appui et au moins un enroulement en un filament électrique ondulé pour chauffage par effet Joule, bobiné de manière continue autour de la plaque d'appui et dont les spires sont maintenues sur les bords longitudinaux de la plaque d'appui au moyen de courbures du filament chauffant, caractérisé en ce que le filament chauffant (5, 5a, 5b) est disposé de telle façon qu'il n'entre en contact qu'avec des chants longitudinaux (20) et/ou des bords des chants longitudinaux (20) de la plaque d'appui (3a, 3b) et en ce que le filament chauffant (5, 5a, 5b) est guidé sur les chants longitudinaux (20) de la plaque d'appui (3a, 3b) dans la zone d'une courbure convexe (12), un angle de courbure (α) entre les zones du filament chauffant (5, 5a, 5b) venant en contact de part et d'autre avec la courbure (12) étant supérieur à 40°.
  2. Corps de chauffe électrique selon la revendication 1, caractérisé en ce que l'angle de courbure (α) est supérieur à 60°.
  3. Corps de chauffe électrique selon la revendication 1 ou 2, caractérisé en ce que le filament chauffant (5, 5a, 5b) présente, en plus des flancs droits (11c) disposés entre des pleins d'onde (11a) et des creux d'onde (llb) correspondants, d'autres segments droits (13), de longueur supérieure à celle des flancs (11c).
  4. Corps de chauffe électrique selon la revendication 3, caractérisé en ce que les segments droits (13) sont au moins deux fois aussi longs que les flancs (11c).
  5. Corps de chauffe électrique selon la revendication 3 ou 4, caractérisé en ce que les segments droits (13) s'étendent sensiblement tangentiels aux spires de l'enroulement.
  6. Corps de chauffe électrique selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le filament chauffant (5, 5a, 5b) présente, pour l'utilisation d'une pluralité de plaques d'appui (3a, 3b), dans une zone (11) située entre les plaques d'appui (3a, 3b), un modèle d'onde régulier de pleins d'onde (11a) et de creux d'onde (11b).
  7. Corps de chauffe électrique selon la revendication 6, caractérisé en ce que le filament chauffant (5, 5a, 5b) est maintenu sur les plaques d'appui (3a, 3b) dans des zones transitoires (12) entre les segments droits (13) et les segments ondulés (11).
  8. Corps de chauffe électrique selon la revendication 7, caractérisé en ce que le filament chauffant (5, 5a, 5b) présente, entre des segments droits (13) venant en contact avec des chants longitudinaux (20) opposés, au moins un creux d'onde supplémentaire (17), dont la crête vient en contact avec une face extérieure (14) de la plaque d'appui (3a, 3b).
  9. Corps de chauffe électrique selon la revendication 6 ou 7, caractérisé en ce que le filament chauffant (5, 5a, 5b) présente, entre des segments droits (13) venant en contact avec des chants longitudinaux (20) opposés, deux creux d'onde (17) et en ce que dans un segment situé entre ceux-ci, le filament chauffant (5, 5a, 5b) est conformé selon un tracé sensiblement en M.
  10. Corps de chauffe électrique selon l'une quelconque des revendications 1 à 9, caractérisé en ce qu'il présente un enroulement double ou multiple sous la forme d'au moins deux filaments chauffants (5a, 5b) enroulés de manière parallèle.
  11. Corps de chauffe électrique selon l'une quelconque des revendications selon l'une quelconque des revendications 1 à 10, caractérisé en ce que pour l'utilisation de plusieurs plaques d'appui (3a, 3b), on place un dispositif sensible à la température (21,22) dans une zone située entre les plaques d'appui (3a, 3b).
  12. Corps de chauffe électrique selon l'une quelconque des revendications 1 à 11, caractérisé en ce que la plaque d'appui (3a, 3b) présente sur ses chants longitudinaux (20) des cannelures (8) destinées à recevoir les enroulements du filament chauffant (5, 5a, 5b).
  13. Corps de chauffe électrique selon l'une quelconque des revendications 1 à 12, caractérisé en ce que la plaque d'appui (3a, 3b) présente des ouvertures (10') dans la zone de l'enroulement.
  14. Corps de chauffe électrique selon l'une quelconque des revendications 1 à 13, caractérisé en ce que le filament chauffant (5, 5a, 5b) présente une caractéristique PTC.
  15. Corps de chauffe électrique selon l'une quelconque des revendications 1 à 14, caractérisé par un nombre variable d'enroulements de filament chauffant par unité de longueur le long de la plaque d'appui (3a, 3b).
  16. Corps de chauffe électrique selon l'une quelconque des revendications 1 à 15, caractérisé en ce que l'on peut adapter à chaque dimension d'une profondeur des creux d'ondes (11b, 17) ou d'une hauteur des pleins (11a, 19) du filament chauffant (5, 5a, 5b) une résistance électrique du corps de chauffe (1).
  17. Corps de chauffe électrique selon l'une quelconque des revendications 1 à 16, caractérisé par un circuit de retour (24) guidé entre les plaques d'appui (3a, 3b) dans le cas où l'on en utilise plusieurs.
  18. Corps de chauffe électrique selon l'une quelconque des revendications 11 à 17, caractérisé en ce que deux faces de branchement pour le dispositif de température (21, 22) sont constituées par le circuit de retour (24).
  19. Corps de chauffe électrique selon l'une quelconque des revendications 1 à 18, caractérisé en ce qu'un circuit de retour est guidé à travers un carter (2) du corps de chauffe.
  20. Corps de chauffe électrique selon l'une quelconque des revendications 1 à 19, caractérisé en ce que la au moins une plaque d'appui (3a, 3b) forme dans le sens d'écoulement par rapport à des parois de guidage (2a) d'un carter (2) un angle différent de 0° et inférieur à 90°.
EP03025389A 2002-11-09 2003-11-05 Dispositif de chauffage pour gaz Expired - Lifetime EP1418794B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20217309U 2002-11-09
DE20217309U DE20217309U1 (de) 2002-11-09 2002-11-09 Heizkörper für gasförmige Medien

Publications (2)

Publication Number Publication Date
EP1418794A1 EP1418794A1 (fr) 2004-05-12
EP1418794B1 true EP1418794B1 (fr) 2005-03-16

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP03025389A Expired - Lifetime EP1418794B1 (fr) 2002-11-09 2003-11-05 Dispositif de chauffage pour gaz

Country Status (4)

Country Link
US (1) US6864467B2 (fr)
EP (1) EP1418794B1 (fr)
AT (1) ATE291339T1 (fr)
DE (2) DE20217309U1 (fr)

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ITPC20060034A1 (it) * 2006-08-04 2008-02-05 Gamma Spa Nuova resistenza elettrica con ridistribuzione spaziale della potenza per asciugacapelli e apparecchi simili
US9665633B2 (en) 2014-02-19 2017-05-30 Snowflake Computing, Inc. Data management systems and methods
EP3682711B1 (fr) * 2018-07-18 2021-07-07 Gamma S.P.A. Dispositif de chauffage d'air pour sèche-cheveux, dispositif de soufflage pour sèche-cheveux et sèche-cheveux comprenant lesdits dispositifs
CN110578954B (zh) * 2019-09-21 2024-10-15 芜湖华族环境技术股份有限公司 一种电暖器隔热结构

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Also Published As

Publication number Publication date
EP1418794A1 (fr) 2004-05-12
US6864467B2 (en) 2005-03-08
US20040091250A1 (en) 2004-05-13
DE50300369D1 (de) 2005-04-21
ATE291339T1 (de) 2005-04-15
DE20217309U1 (de) 2003-01-30

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