EP1681906B1 - Radiateur scellé - Google Patents

Radiateur scellé Download PDF

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Publication number
EP1681906B1
EP1681906B1 EP20050000743 EP05000743A EP1681906B1 EP 1681906 B1 EP1681906 B1 EP 1681906B1 EP 20050000743 EP20050000743 EP 20050000743 EP 05000743 A EP05000743 A EP 05000743A EP 1681906 B1 EP1681906 B1 EP 1681906B1
Authority
EP
European Patent Office
Prior art keywords
hollow body
heating element
pressing
radiator
sealing 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.)
Active
Application number
EP20050000743
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German (de)
English (en)
Other versions
EP1681906A1 (fr
Inventor
Leonhard Vetter
Didier Lehmann
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.)
DBK David and Baader GmbH
Original Assignee
DBK David and Baader 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
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Application filed by DBK David and Baader GmbH filed Critical DBK David and Baader GmbH
Priority to EP20050000743 priority Critical patent/EP1681906B1/fr
Priority to DE200550000629 priority patent/DE502005000629D1/de
Publication of EP1681906A1 publication Critical patent/EP1681906A1/fr
Application granted granted 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
    • H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material
    • H05B3/52—Apparatus or processes for filling or compressing insulating material in tubes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/08—Cooling, heating or ventilating arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/02—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
    • 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
    • H05B3/50—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material heating conductor arranged in metal tubes, the radiating surface having heat-conducting fins
    • 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
    • H05B2203/02—Heaters using heating elements having a positive temperature coefficient

Definitions

  • the present invention relates to a radiator with a hollow body profile of metal and with a fixed in the hollow body by pressing heating element.
  • the present invention relates to radiators that can be used in humid environments.
  • the degree of protection IP 67 according to DIN 40050 (IEC 529, VDE 0470 or EN 60529), according to the first code regarding contact and foreign body protection, means that the component is protected against dust ingress, and according to the second code, which is the scope of protection Penetration of water indicates that sufficient protection is ensured during brief immersion.
  • DE 100 23 272 C1 for example, only a jet water protection, d. H. the degree of protection IP 65, reached.
  • U.S. Patent 4,822,980 discloses a heater adapted to be installed in the opening of the side wall of a compressor in which a PTC thermistor is disposed in an aluminum housing and sealed with a magnesium oxide filled silicone rubber. For supporting the wires and for visually covering the heating element caps are attached.
  • U.S. Patent 4,352,008 discloses an electric heater having a PTC heating element installed in an opening of a radiator and sealed by a thermally conductive material, preferably silicone rubber. However, there is nowhere in this heater provided a seal, but the silicone rubber is poured into the cavity.
  • the object underlying the present invention is to provide a generic radiator and an associated manufacturing method, whereby an improved protection against the ingress of foreign bodies and water can be achieved at the same time simple and inexpensive to manufacture.
  • the present invention is based on the idea that a radiator, in which a prefabricated sealing element is provided, which is pressed together with a heating element by compressing the narrow sides of the hollow body profile in the hollow body, a seal at least up to a degree of protection according to DIN 40050 IP 67th , d. H. against dust entry and protection when immersed in water, guaranteed and yet does not preclude automated assembly.
  • the manufacturing method according to the invention avoids additional work steps for sealing the radiator by the pressing of the seals occurs simultaneously with the pressing of the heating element.
  • prefabricated sealing elements can be produced with substantially fewer defects than is possible with injected or cast potting compounds.
  • the hollow body profile can be produced by methods known per se, such as extrusion or milling.
  • a good heat-conducting metal preferably aluminum, is used.
  • the heating element comprises a PTC heating element.
  • a PTC heating element designates a resistance heating element which comprises at least one resistance component with a positive temperature coefficient (PTC component) and thus connects the functions of heating and temperature self-limiting in one element. In the smallest space can be achieved with such heating elements, which are usually made on a ceramic basis, high power densities.
  • the PTC module is sandwiched for optimum heat dissipation between contact plates connected to the electrical terminals and the entire assembly is surrounded by electrical insulation.
  • the filler has several functions: First, it serves the electrical insulation between the heating element and the hollow body, on the other hand, it supports the heat transfer from the heating element to the hollow body and finally takes place in the filling material, a heat storage, which leads to a more uniform heat dissipation.
  • the seal is made of a flexible material.
  • silicone rubber as the material for the sealing element offers the advantages of easy manufacturability, sufficient elasticity and at the same time thermal stability.
  • At least one opening is provided in the sealing element, through which the electrical connections are guided for contacting the heating element.
  • At least one electrically and thermally insulating protective hose can be provided, through which the connection cables are routed, on the one hand to form a kink protection and, on the other hand, to meet the requirements of electrical contact protection.
  • Such protective tubes can be made, for example, from glass fiber, Kapton, PTFE or the like.
  • the inventive shaping of the hollow body profile is achieved in a simple manner that even with dimensional tolerances in the heating element and in the hollow body profile and tolerances in the movement of the punch only small deviations in the contact pressure arise and a permanent deformation is achieved, which leads to the desired tightness.
  • FIG. 1 shows a top view of a heating element 100 according to an advantageous embodiment, in which a PTC heating element is used as the heating element 102.
  • a PTC heating element is used as the heating element 102.
  • the following statements can be analogously also applied to a radiator with a resistance wire heating element.
  • a PTC heating element 102 is accommodated in an aluminum hollow body profile 104.
  • a profile is shown as a hollow body profile in the embodiment shown, as it can be used for a control cabinet heating.
  • the solution according to the invention can also be applied to profile shapes without ribs for heat dissipation, as required for example for kettles or baby food warmers.
  • the solution according to the invention is advantageous.
  • the PTC heating element 102 in this case comprises at least one PTC module 122, which is sandwiched by contact plates 124, and an optional insulating film 126 for establishing the required electrical insulation between the contact plates 124 and the hollow body profile 104.
  • the contact plates 124 are connected to the electrical connections 106 connected.
  • two connecting leads 106 are provided, which are led out at the level of the cutting line A-A.
  • the two open ends of the hollow body profile 104 are closed by means of two seals 108, 110.
  • the two seals 108, 110 differ in their shape only in that the seal 108 is provided with openings 112 for passing through the terminals 106.
  • FIGS. 2 and 3 show the sections along the lines B-B and A-A from FIG. 1. It can be seen that the seals 108, 110 are adapted in their cross-section to the inner contour of the hollow body 104.
  • the seal 108 attached to the terminal-side end of the heater body 100 also has two openings 112 for passing the lead wires 106. Of course, any other number of openings 106 could also be provided.
  • the hollow profile 104 has outwardly curved side surfaces 114 whose radius of curvature is reduced by the compression.
  • the cover and base surfaces 116, 118 can be optimally brought into contact with the PTC element.
  • FIG. 4 shows a longitudinal section through the PTC heating body 100 according to the invention along the section line CC of FIG. 1.
  • the inner wall of the hollow body 104 is brought into contact with the PTC heating element over the entire area and made possible
  • the gaskets 108, 110 are pressed so that the interior is sealed against ingress of dust and moisture up to a protection class of IP 67 or better.
  • FIGS. 5 and 6 show sections along the section lines B-B and A-A of FIG. 1 before and after the pressing.
  • the outer contour of the seals 108, 110 fills the inner cross section of the hollow body profile 104 in the unpressed state.
  • the height H of the profile opening in the unpressed state for example, o, 15 mm greater than that of the seals.
  • a simple installation of the seals is guaranteed. If, as symbolized by the arrows 120, mechanical pressure is exerted on the base and top surfaces of the hollow body profile 104, the radius of curvature of the outwardly curved region is reduced in the regions 114, so that the seals 108, 110 are compressed in this region, this reduces the height H to H '.
  • the seal is firmly pressed in the area of the base and top surfaces and the diameter of the openings 112 have been reduced so much that even in the region of the connecting strands 106, a sufficient seal is achieved. Since, as can be seen in FIG. 4, the seals 108, 110 can escape in the longitudinal direction, a problem-free compensation of tolerances is possible.
  • FIGS. 7 to 9 The design of the prefabricated seal, which may for example consist of silicone, is apparent from FIGS. 7 to 9 in detail.
  • the two seals 108 and 110 have the same cross-section and the seal 108 is additionally equipped with the openings 112 for passing through the connecting wires.
  • the outer contour of the seal 108, 110 is adapted in all details to the inner contour of the hollow body profile 104 and dimensioned so that it can be inserted with slight undersize in the unpressed profile , In the compressed state, the seal is compressed from all sides, so that sufficient pressure is exerted on the openings 112.
  • a PTC heating element 102, a hollow body profile 104 and the seals 108 and 110 are produced independently of one another.
  • the outer contour of each sealing element substantially corresponds to the contour of the inner cross section of the hollow body 104.
  • the hollow body 104 may be made of aluminum with magnesium and silicon admixtures, for example.
  • a sealing material is for example silicone in question, the z. B. was molded by means of an injection molding process. Possible alternative production methods are also punching or water jet cutting.
  • the PTC element 102 which consists of at least one PTC module 122, the contact plates 124 provided with the electrical connections 106 and an insulating film 126, is first introduced into the hollow body 104.
  • an additional insulating protective hose can be pulled around the connections 106. Shields and the like may be additionally provided.
  • the gaskets 108 and 110 are used.
  • the seal 108 is inserted so that the terminals 106 are passed through the openings 112.
  • a pressing step is carried out analogously to the pressing of the PTC radiator, as shown in EP 0 573 691 B1.
  • the regions 114 are deformed such that they have a reduced radius of curvature in their curved region and, moreover, are tilted by about 10 ° to 30 ° with respect to the vertical.
  • any differently shaped profiles can be sealed in the manner of the invention.
  • FIG. 10 to 12 Various examples of differently shaped profiles of the hollow body 104, which have substantially the same inner cross section as the first embodiment shown in Figure 2, are shown in Figures 10 to 12.
  • the design of the outer contours can be adapted to the respective heating task.
  • the inner cross section does not have to be limited to embodiments in which the side surfaces are curved convexly outwards and are deformed outwards during pressing.
  • FIG. 13 shows an example of a hollow body profile 104 before compression, in which the side surfaces 114 are concavely curved inward.
  • the cross-sectional shape shown in Figure 14 in which the side surfaces 114 have deformed inwardly and the height has been reduced to H '.
  • FIG. 15 Another example of a hollow body profile 104 with outwardly curved side surfaces 114 is shown in FIG. 15 before compression and in FIG. 16 after compression.
  • FIGS. 17 to 19 show various sectional views of such a heating element 100 with a resistance wire heating element 102.
  • the filler 128 has several functions: First, it serves the electrical insulation between the heating element 102 and the hollow body 104, on the other hand it supports the heat transfer from the heating element 102 to the hollow body 104 and finally takes place in the filling material 128, a heat storage in the Temporal means leads to a more uniform heat dissipation.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Ceramic Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Resistance Heating (AREA)

Claims (26)

  1. Radiateur avec un profil de corps creux (104) en métal et un élément de chauffage (102) positionné dans le corps creux (104), caractérisé en ce que le corps de chauffe (100) présente au moins un élément d'étanchéité préfabriqué (108, 110) pour rendre étanche l'élément de chauffage (102) par rapport à l'environnement et en ce que le au moins un élément d'étanchéité (108, 110) est enfoncé dans le corps creux (104).
  2. Radiateur selon la revendication 1, dans lequel le profil de corps creux (104) est fabriqué en aluminium.
  3. Radiateur selon la revendication 1 ou 2, dans lequel le profil de corps creux (104) est formé par un profilé filé.
  4. Radiateur selon au moins une des revendications précédentes, dans lequel l'élément de chauffage (102) comprend un élément de chauffage CTP - à coefficient de température positif.
  5. Radiateur selon la revendication 4, dans lequel l'élément de chauffage à CTP (102) est fixé par compression dans le corps creux (104).
  6. Radiateur selon la revendication 1 à 3, dans lequel l'élément de chauffage (102) comprend un élément de chauffage à fil de résistance.
  7. Radiateur selon la revendication 6, dans lequel entre l'élément de chauffage à fil de résistance et le profil de corps creux (104) est prévue une masse de remplissage.
  8. Radiateur selon la revendication 7, dans lequel la masse de remplissage est fabriquée à partir d'oxyde de magnésium.
  9. Radiateur selon au moins une des revendications précédentes, dans lequel les petits côtés du profil de corps creux (104) présentent des zones coudées vers l'extérieur de façon convexe dont le rayon de courbure est réduit par la compression.
  10. Radiateur selon au moins une des revendications précédentes, dans lequel les petits côtés du profil de corps creux (104) présentent des zones coudées vers l'intérieur de façon concave, dont le rayon de courbure est réduit par la compression.
  11. Radiateur selon au moins une des revendications précédentes, dans lequel la section transversale de l'élément d'étanchéité (108, 110) est formée de manière telle que son profil extérieur correspond essentiellement au profil de la section transversale interne du corps creux (104).
  12. Radiateur selon au moins une des revendications précédentes, dans lequel l'élément d'étanchéité (108, 110) est fabriqué en une matière souple.
  13. Radiateur selon la revendication 12, dans lequel l'élément d'étanchéité (108, 110) est fabriqué en silicone.
  14. Radiateur selon au moins une des revendications précédentes, dans lequel l'élément d'étanchéité (108, 110) peut être fabriqué selon la technique du moulage par injection, par découpage à la presse ou découpage par jet d'eau.
  15. Radiateur selon au moins une des revendications précédentes, dans lequel l'élément d'étanchéité (108, 110) présente au moins une ouverture (112) pour réaliser des raccords électriques (106) pour la mise en contact de l'élément de chauffage.
  16. Radiateur selon la revendication 15, dans lequel les raccords (106) sont guidés par au moins une gaine de protection électriquement et thermiquement isolante.
  17. Procédé de fabrication d'un radiateur avec un profil de corps creux (104) en métal, un élément de chauffage (102) et au moins un élément d'étanchéité (108, 110) pour rendre étanche l'élément de chauffage par rapport à l'environnement, le procédé présentant les étapes suivantes :
    introduction de l'élément de chauffage (102) dans le corps creux (104),
    insertion du au moins un élément d'étanchéité (108, 110) dans le corps creux,
    compression du corps creux dans un sens transversal à un axe longitudinal du corps creux.
  18. Procédé selon la revendication 17, dans lequel l'élément de chauffage (102) comprend un élément de chauffage CTP et la compression est effectuée jusqu'à ce qu'une surface de base et une surface de recouvrement du corps creux soient en appui avec un profil externe de l'élément de chauffage CTP.
  19. Procédé selon la revendication 18, dans lequel l'élément de chauffage (102) comprend un élément de chauffage à fil de résistance et est réalisé avant l'étape de compression de l'étape suivante :
    remplissage de l'espace creux entre l'élément de chauffage et le corps creux avec une masse de remplissage.
  20. Procédé selon la revendication 19, dans lequel la masse de remplissage est fabriquée en oxyde de magnésium.
  21. Procédé selon la revendication 18, dans lequel l'élément de chauffage CTP est fabriqué avec les étapes suivantes :
    liaison des plaques de contact avec des raccords électriquement conducteurs,
    encastrement d'un module CTP entre des plaques de contact électriquement conductrices,
    revêtement du dispositif avec une isolation électrique.
  22. Procédé selon l'une des revendications 17 à 21, dans lequel l'étape de l'insertion du au moins un élément d'étanchéité (108, 110) dans le corps creux (104) comprend :
    l'introduction en glissant de l'élément d'étanchéité dans le corps creux, de sorte que le profil externe de la section transversale de l'élément d'étanchéité correspond essentiellement au profil de la section transversale interne du corps creux.
  23. Procédé selon l'une des revendications 17 à 22, dans lequel l'étape d'insertion du au moins un élément d'étanchéité (108, 110) dans le corps creux comprend en outre :
    la réalisation de raccords électriques pour la mise en contact de l'élément de chauffage par au moins une ouverture du au moins un élément d'étanchéité.
  24. Procédé selon l'une des revendications 17 à 23, dans lequel l'étape de la compression comprend :
    la déformation de zones coudées de façon convexe vers l'extérieur sur les petits côtés du corps creux de manière telle que leur rayon de courbure est réduit par la compression,
    dans lequel la au moins une garniture d'échantéité présente des zones coudées de façon convexe correspondantes dans leur profil externe, dont le rayon de courbure est réduit en conséquence par la déformation du corps creux.
  25. Procédé selon l'une des revendications 17 à 24, dans lequel l'étape de la compression comprend :
    la déformation de zones coudées de façon concave vers l'intérieur sur les petits côtés du corps creux, de manière telle que leur rayon de courbure est réduit par la compression,
    dans lequel la au moins une garniture d'étanchéité présente dans son profil externe des zones coudées de façon concave correspondantes, dont le rayon de courbure est réduit en conséquence par la déformation du corps creux.
  26. Procédé selon l'une des revendications 17 à 25 dans lequel le profil de corps creux (104) est fabriqué en aluminium.
EP20050000743 2005-01-14 2005-01-14 Radiateur scellé Active EP1681906B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20050000743 EP1681906B1 (fr) 2005-01-14 2005-01-14 Radiateur scellé
DE200550000629 DE502005000629D1 (de) 2005-01-14 2005-01-14 Abgedichteter Heizkörper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20050000743 EP1681906B1 (fr) 2005-01-14 2005-01-14 Radiateur scellé

Publications (2)

Publication Number Publication Date
EP1681906A1 EP1681906A1 (fr) 2006-07-19
EP1681906B1 true EP1681906B1 (fr) 2007-04-25

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ID=34933313

Family Applications (1)

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EP20050000743 Active EP1681906B1 (fr) 2005-01-14 2005-01-14 Radiateur scellé

Country Status (2)

Country Link
EP (1) EP1681906B1 (fr)
DE (1) DE502005000629D1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202010010779U1 (de) 2010-07-28 2010-11-11 Dbk David + Baader Gmbh Durchlauferhitzer
US7940156B2 (en) 2007-04-02 2011-05-10 Dbk David + Baader Gmbh Power resistor module
DE102013103433A1 (de) 2012-04-13 2013-10-17 Dbk David + Baader Gmbh Elektrischer Zuheizer
CN105666055A (zh) * 2016-02-03 2016-06-15 苏州新业电子股份有限公司 一种铲齿型ptc加热器用铝管的制备方法
US11118810B2 (en) 2017-10-19 2021-09-14 Tom Richards, Inc. Heat transfer assembly

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011077922B4 (de) * 2011-06-21 2024-10-10 Mahle International Gmbh Wärmeübertrager
DE102016125124A1 (de) * 2016-12-21 2018-06-21 Dbk David + Baader Gmbh Entladewiderstand
DE102017120467A1 (de) 2017-09-06 2019-03-07 Dbk David + Baader Gmbh Heizer und Verfahren zu dessen Herstellung und Heizregister

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1074773B (de) * 1960-02-04 Oberderdingen Karl Fischer (Württ.) Elektrische Heizpatrone
DE2626409A1 (de) * 1976-06-12 1977-12-15 Wigo Widmann Soehne Gottlob Heizelement fuer haar- und handtrockengeraete
DE2902909A1 (de) * 1979-01-26 1980-07-31 Eichenauer Fa Fritz Schaltschrank-heizgeraet
US4822980A (en) * 1987-05-04 1989-04-18 Gte Products Corporation PTC heater device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7940156B2 (en) 2007-04-02 2011-05-10 Dbk David + Baader Gmbh Power resistor module
DE202010010779U1 (de) 2010-07-28 2010-11-11 Dbk David + Baader Gmbh Durchlauferhitzer
DE102013103433A1 (de) 2012-04-13 2013-10-17 Dbk David + Baader Gmbh Elektrischer Zuheizer
CN105666055A (zh) * 2016-02-03 2016-06-15 苏州新业电子股份有限公司 一种铲齿型ptc加热器用铝管的制备方法
US11118810B2 (en) 2017-10-19 2021-09-14 Tom Richards, Inc. Heat transfer assembly

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Publication number Publication date
DE502005000629D1 (de) 2007-06-06
EP1681906A1 (fr) 2006-07-19

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