EP1643806B1 - Elément chauffant - Google Patents

Elément chauffant Download PDF

Info

Publication number
EP1643806B1
EP1643806B1 EP04023223A EP04023223A EP1643806B1 EP 1643806 B1 EP1643806 B1 EP 1643806B1 EP 04023223 A EP04023223 A EP 04023223A EP 04023223 A EP04023223 A EP 04023223A EP 1643806 B1 EP1643806 B1 EP 1643806B1
Authority
EP
European Patent Office
Prior art keywords
heating element
carrier
contact pin
carrier part
pin
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.)
Active
Application number
EP04023223A
Other languages
German (de)
English (en)
Other versions
EP1643806A1 (fr
Inventor
Lukas Gisler-Reinhard
Pius Studer
Leo Wallimann-Durrer
Rolf Aregger
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.)
Leister Process Technologies
Original Assignee
Leister Process Technologies
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 Leister Process Technologies filed Critical Leister Process Technologies
Priority to DE502004001962T priority Critical patent/DE502004001962D1/de
Priority to EP04023223A priority patent/EP1643806B1/fr
Priority to AT04023223T priority patent/ATE345026T1/de
Publication of EP1643806A1 publication Critical patent/EP1643806A1/fr
Priority to HK06108554A priority patent/HK1088492A1/xx
Application granted granted Critical
Publication of EP1643806B1 publication Critical patent/EP1643806B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H05B3/44—Heating elements having the shape of rods or tubes non-flexible heating conductor arranged within rods or tubes of insulating material

Definitions

  • the present invention relates to a heating element for a hot air device with a support member made of temperature-resistant material having arranged in air ducts heating wires and at one end face of a ceramic contact pin carrier is arranged for electrical contact and the second end face is covered with a temperature-resistant protective glass.
  • the end pieces of the multi-part heating element are exactly aligned with the carrier part and are fixed to the carrier part by means of a centrally arranged metal holding pin.
  • heating elements are known from hot air devices available on the market as hot air devices, modules or systems.
  • the body of the arranged in an air or gas flow heating element is usually made of ceramic or other suitable, heat-resistant material and is located in a heating tube, at the one end, for example, air or gas is blown.
  • the heating element is held, for example via a central pin on a arranged on the fan side facing the holder.
  • This holder is also the electrical connection of arranged in the support member heating wires.
  • On the side facing the outlet is usually still in addition a ceramic cover, which has substantially air channels.
  • the protective screen is movable and from the carrier separated, but also sits on the pin-shaped holder, which is crushed at its free end, for example, to prevent slipping of the carrier and the protective disk.
  • bracket, the heating wire carrier and the protective screen are aligned exactly during assembly and this alignment is ensured over the entire service life of the heating element and also during operation under the influence of thermal and mechanical loads.
  • the central receiving pin as a square pin and the associated receiving holes of the items corresponding or to form on the contact surfaces of the items on the outer circumference in recesses engaging noses.
  • Such designed ceramic parts are expensive to produce and cause high individual item costs and are not permanently reliable due to the risk of breakage of the ceramic.
  • a hot air device in which a heating element arranged in the air flow has a carrier part of temperature-resistant material and arranged in air channels of the carrier part heating wires.
  • a protective plate and at a rear end of the support part a contact pin carrier is arranged and fixed by means of a metallic retaining pin.
  • the retaining pin has a square shape and is designed as a hollow pin. Due to the square shape of the retaining pin and the complementary formed receiving channel for the retaining pin of the retaining pin secures the contact pin carrier and the protective screen against rotation relative to the support member.
  • the present invention is therefore based on the object to propose an improved heating element, in which the rotation protection is made simpler and more effective and in addition the unit costs are reduced.
  • the carrier part, the contact pin carrier and the protective disk are aligned with one another over a torsion protection element penetrating the carrier part over its entire length.
  • a locking pin of the anti-rotation element is loosely inserted in a receiving channel of the heating element and is enclosed by the contact pin carrier and / or the protective plate in the heating element.
  • the Verfschutziata in a further advantageous embodiment of the invention consist of a, aligned by holes of the contact pin carrier, the support member and the protective disk receiving channel and a locking pin inserted therein, which maintains the positionally accurate alignment.
  • Both the holes and the pin can be inexpensively, the latter e.g. be made of an extruded profile, and thus enable accurate location and location compliance even at different operating temperatures of the hot air device.
  • the locking pin is loosely inserted and secured by associated contact elements.
  • the carrier part has at least one through hole for receiving the securing pin and the contact pin carrier and the protective disk to the receiving hole of the carrier part corresponding holes.
  • Holes are simple, quick and highly accurate to manufacture and reduce the cost of the tools needed for manufacturing.
  • the holes of the contact pin carrier and the protective disc are at least partially formed as blind holes to prevent falling out of the locking pin.
  • the anti-rotation elements are expediently arranged parallel to the air ducts extending in the longitudinal direction of the carrier part and penetrate the carrier part over its entire length. This makes it possible to produce the carrier part of an extruded profile and finish without reworking by mere cutting to length. Thus, the number of process steps in the production of the support member is significantly reduced, which in turn leads to a reduction in the unit cost.
  • the heating element has at least one receiving channel for receiving a locking pin.
  • the receiving channel and the locking pin are arranged eccentrically to the central axis of the heating element.
  • only one anti-rotation element is provided. However, it is also possible to arrange several Vermosschutzetti offset from each other.
  • the locking pin can be made as a metallic pin or other temperature-stable materials. Conveniently, the locking pin at one end to a thickening. This thickening secures the loose locking pin against falling out by investing in the front side of a running with a smaller diameter receiving hole of the support member.
  • the thickening is produced as a flattening, for example by pinching the securing pin.
  • the holes designed as a blind hole of the contact pin holder and / or the protective disk have a larger diameter than the corresponding hole in the carrier part.
  • the securing pin is shorter than the body of the heating element is long. This has the advantage that the locking pin is completely enclosed in the body of the heating element.
  • FIG. 1 shows an embodiment of the heating element 1 according to the invention, consisting of a carrier part 2, which is arranged between a contact pin carrier 3 and a protective disk 4.
  • the contact pin carrier 3 has air passages 5, which are aligned with the axial air channels, not shown, in the carrier part 2 and the air passages of the protective disk 3, not shown.
  • heating wires, not shown are arranged in a known manner.
  • the heating element 1 has centrally arranged one of three consecutively arranged holes in the contact pin carrier 3, carrier part 2 and protective plate 4 existing receiving channel 16 for a retaining pin 7, through which the support member 2 and the protective plate 4 are fixed to the contact pin carrier 3.
  • the two protruding from the heating element 1 ends of the hollow cylindrical retaining pin 7 are flanged. and hold the protective plate 4 and the contact pin carrier 3 on the support part 2 firmly.
  • a Verwartikelement 8 is arranged, which prevents the carrier part 2 and / or the protective plate 4 is changed to the contact pin carrier 3 in its radial orientation.
  • the anti-rotation element 8 is formed from a receiving channel 17 and a loosely fitting locking pin 9.
  • FIG 2 shows a sectional view of the side view of the heating element 1 shown in Figure 1.
  • the retaining pin 7 is disposed in the central axis and extends with its two ends on the protective plate 4 and the contact pin carrier 3 addition.
  • Below the retaining pin 7 of the receiving channel 17 is shown for the locking pin 9, which consists of three mutually aligned, abutting holes 11, 10, 12 of the contact pin carrier 3, the support member 2 and the protective screen 4.
  • the holes 10, 11, 12 form the receiving channel 17 for the locking pin 9.
  • the hole 12 in the protective plate 4 is designed as a through hole and has a larger diameter than the through hole 10 of the support member 2.
  • the corresponding hole 11 in the contact pin carrier 3 is stepped and executed as a blind hole.
  • the support part 2 facing the end of the blind hole has a larger diameter than the opposite end and as the associated through hole 10 of the support member 2.
  • the thickening 13 of the locking pin 9 is received and this fixed in the axial direction.

Landscapes

  • Resistance Heating (AREA)
  • Direct Air Heating By Heater Or Combustion Gas (AREA)

Claims (7)

  1. Elément chauffant (1) pour un dispositif à air chaud, composé d'une pièce porteuse (2), d'un support de broches de contact (3) et d'un(e) disque ou plaque de protection (4), dont la pièce porteuse (2) en matériau résistant à la température présente des fils chauffants disposés dans des canaux d'air et aux faces frontales de laquelle sont disposés le support de broches de contact (3) en céramique pour la connexion électrique des fils chauffants et le disque de protection (4) en matériau résistant à la température, le support de broches de contact (3) et le disque de protection (4) présentant des passages d'air (5) alignés avec les canaux d'air de la pièce porteuse (2) et étant fixés sur la pièce porteuse (2) au moyen d'une tige de fixation métallique centrale (7), caractérisé par le fait que la pièce porteuse (2), le support de broches de contact (3) et le disque de protection (4) sont alignés les uns sur les autres par au moins un élément de blocage de rotation (8) traversant la pièce porteuse (2) sur toute sa longueur, une goupille de sécurité (9) de l'élément de blocage de rotation (8) étant placée librement dans un canal de réception (17) de l'élément chauffant (1) et enfermée dans l'élément chauffant (1) par le support de broches de contact (3) et/ou le disque de protection (4).
  2. Elément chauffant selon la revendication 1, caractérisé par le fait que le canal de réception (17) est formé par un trou de passage (10) dans la pièce porteuse (2) et par des trous (11, 12) alignés avec le trou de passage (10) dans le support de broches de contact (3) et dans le disque de protection (4).
  3. Elément chauffant selon la revendication 2, caractérisé par le fait que les trous (11, 12) du support de broches de contact (3) et/ou du disque de protection (4) sont réalisés sous forme de trous borgnes, les trous borgnes (11, 12) étant dirigés vers la pièce porteuse (2).
  4. Elément chauffant selon l'une des revendications précédentes, caractérisé par le fait que l'élément de blocage de rotation (8) de l'élément chauffant (1) est disposé parallèlement aux canaux d'air s'étendant en direction longitudinale de la pièce porteuse (2).
  5. Elément chauffant selon l'une des revendications précédentes, caractérisé par le fait que la goupille de sécurité (9) présente un épaississement à une extrémité.
  6. Elément chauffant selon l'une des revendications précédentes, caractérisé par le fait que les trous (11, 12) dans le support de broches de contact (3) et dans le disque de protection (4) présentent un plus grand diamètre que les trous (10) dans la pièce porteuse (2).
  7. Elément chauffant selon l'une des revendications précédentes, caractérisé par le fait que la goupille de sécurité (9) est plus courte que le corps de l'élément chauffant (1) n'est long.
EP04023223A 2004-09-29 2004-09-29 Elément chauffant Active EP1643806B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE502004001962T DE502004001962D1 (de) 2004-09-29 2004-09-29 Heizelement
EP04023223A EP1643806B1 (fr) 2004-09-29 2004-09-29 Elément chauffant
AT04023223T ATE345026T1 (de) 2004-09-29 2004-09-29 Heizelement
HK06108554A HK1088492A1 (en) 2004-09-29 2006-08-01 Heating element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04023223A EP1643806B1 (fr) 2004-09-29 2004-09-29 Elément chauffant

Publications (2)

Publication Number Publication Date
EP1643806A1 EP1643806A1 (fr) 2006-04-05
EP1643806B1 true EP1643806B1 (fr) 2006-11-08

Family

ID=34926783

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04023223A Active EP1643806B1 (fr) 2004-09-29 2004-09-29 Elément chauffant

Country Status (4)

Country Link
EP (1) EP1643806B1 (fr)
AT (1) ATE345026T1 (fr)
DE (1) DE502004001962D1 (fr)
HK (1) HK1088492A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104302024A (zh) * 2014-10-27 2015-01-21 苏州伟热电器科技有限公司 蜂窝型替芯
CN104302023A (zh) * 2014-10-27 2015-01-21 苏州伟热电器科技有限公司 加热风管替芯

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5134684A (en) * 1990-05-21 1992-07-28 Gte Products Corporation Electric air or gas heater utilizing a plurality or serpentine heating elements
EP1701237B1 (fr) * 2001-01-24 2012-11-07 Leister Technologies AG Elément chauffant

Also Published As

Publication number Publication date
HK1088492A1 (en) 2006-11-03
DE502004001962D1 (de) 2006-12-21
ATE345026T1 (de) 2006-11-15
EP1643806A1 (fr) 2006-04-05

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