EP1528838B1 - Elektrisches Heizelement - Google Patents

Elektrisches Heizelement Download PDF

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Publication number
EP1528838B1
EP1528838B1 EP04256795A EP04256795A EP1528838B1 EP 1528838 B1 EP1528838 B1 EP 1528838B1 EP 04256795 A EP04256795 A EP 04256795A EP 04256795 A EP04256795 A EP 04256795A EP 1528838 B1 EP1528838 B1 EP 1528838B1
Authority
EP
European Patent Office
Prior art keywords
electrical contact
ptc
heater element
contact member
electrical
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.)
Not-in-force
Application number
EP04256795A
Other languages
English (en)
French (fr)
Other versions
EP1528838A2 (de
EP1528838A3 (de
Inventor
Bertrand Dupont
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.)
Delphi Technologies Inc
Original Assignee
Delphi Technologies Inc
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 Delphi Technologies Inc filed Critical Delphi Technologies Inc
Publication of EP1528838A2 publication Critical patent/EP1528838A2/de
Publication of EP1528838A3 publication Critical patent/EP1528838A3/de
Application granted granted Critical
Publication of EP1528838B1 publication Critical patent/EP1528838B1/de
Anticipated expiration legal-status Critical
Not-in-force legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/02—Housing; Enclosing; Embedding; Filling the housing or enclosure
    • H01C1/022—Housing; Enclosing; Embedding; Filling the housing or enclosure the housing or enclosure being openable or separable from the resistive element
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C1/00—Details
    • H01C1/14—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors
    • H01C1/1406—Terminals or electrodes formed on resistive elements 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
    • H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
    • H05B3/12—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
    • H05B3/14—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material the material being non-metallic
    • 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 an electrical heater element based on PTC (positive temperature co-efficient) components.
  • the invention also relates to a method of assembling such a heater element.
  • An electrical heater based on PTC components is made in such a way that a pressure is applied on both faces of the PTC component to ensure a good electrical contact and a good thermal contact.
  • Some such heaters elements have a design where the PTC component is enclosed in a tube with insulation devices and it requires a very accurate press-fit process.
  • the good point of this latter assembly is that the tube is grounded and does provide insulation protection regarding, for example, a heating ventilating and air-conditioning (HVAC) module in a motor vehicle.
  • HVAC heating ventilating and air-conditioning
  • the draw back is that fitting the various components together can be difficult and can result in poor alignment of the PTC elements within the tube which may comprise thermal and electrical contact.
  • the fins that transmit the heat to the air are stacked up and require a complex assembly process.
  • PTC heating device is disclosed in Japanese Patent Publication No 04258982 which describes a heater for a copying machine.
  • the heater has a PTC element positioned directly between first and second electrical terminals.
  • the aim of the present invention is to overcome one or more of the above disadvantages.
  • the invention provides an electrical heater as defined in claim 1.
  • An advantage of such a heater element is that it comprises a minimal number of pieces whilst still providing good retention, good electrical contact between the or each PTC component and the first and second electrical contact members, and good thermal contact.
  • a further advantage of a minimal number of pieces is simplicity of assembly.
  • the electrical contact plates may be adapted to be urged into contact with the or each PTC component.
  • the plates may be generally curved in the direction of the or each PTC component or shaped in a way such that they have an increased tendency to oppose a force that would act to reduce the retention and the electrical contact of the or each PTC component.
  • the second electrical contact member may comprise locking means for locking the electrical contact plates together.
  • the or each frame member may be adapted to position the or each PTC component by having apertures in which the or each PTC component may be received.
  • the invention also provides a method of assembling an electrical heater element as defined by claim 2.
  • a heater element according to the invention is particularly well suited to use in an HVAC module of a motor vehicle.
  • a first embodiment of an electrical heater element 1 comprises a first electrical contact member in the form of a battery contact strip 2, first and second frame members 4, 6, one on either of the opposing major sides 13, 15 of the battery contact strip 2, PTC elements 8 (only one of which is identifiable in figure 1), and a second electrical contact member in the form of a grounded casing member 10.
  • the contact strip 2 may comprise any suitable electrically conductive material, such as brass with tin-silver coating.
  • the first and second frame members 4,6 may comprise any suitable electrically insulating material, for instance plastic materials, such as PBT GF30.
  • the casing member 10 may comprise any suitable electrically conductive material such as aluminium.
  • the contact strip 2 is elongated in the sense that it extends along an axis perpendicular to the plane of figure 1 (as shown in figure 2).
  • the first and second frame members 4, 6 similarly extend, and are so adapted, in this case with mating features 12, 14, so as to "click-fit” together around the contact strip 2.
  • one purpose of the frame members 4, 6 is to space the casing member 10 from the contact strip 2.
  • each of the frame members 4, 6 is provided along its length with a series of apertures 16, 18; that is elongate rectangular openings extending from a side of the respective frame member 4, 6 adjacent the battery contact strip 2 to a side 24 26 opposite (the contact strip 2).
  • Each of the apertures 16, 18 is sized to receive a PTC component 8 (in figure 1, only one of the left-hand apertures 16 is shown with a PTC element 8 slotted therein).
  • PTC components 8 are slightly deeper than the apertures 16 so as to stand proud at A for the purpose of ensuring good electrical contact between the PTC components and the casing member 10.
  • the casing member 10 which is shown in figure 1 during the process of assembling the heater element 1, is generally o-shaped in the assembled element 1, but is so adapted, in this case by being made of flexible, resilient material, as to enable the casing member 10 to be manipulated between an "open" o-shape and a "closed” o-shape positions.
  • the casing member 10 has top arms 28, 30 that are adapted to overlap in the assembled heater element and are provided with a series of mating features 32, 34, in this case notches 32 and protrusions 34, for the purpose of locking the casing member 10 in the "closed" o-shape.
  • An electrical contact plate is provided by each of the major sides 36, 38 of the casing member 10.
  • the contact strip 2 with the click fitted frame members 4, 6 therearound and the PTC components received in the frame members 4, 6, may be slidably received or inserted between the contact plates 36, 38.
  • the contact strips 36, 38 are in effect locked together, the contact strip 2, the frame members 4, 6 and the PTC components 8 are retained between the contact plates 36, 38.
  • This tendency to curve has the effect of urging the sides 36, 38 into contact with the respective PTC components 8 thereby to apply a transverse force on the PTC components 8 (in effect they are squeezed between the contact plates 36, 38) so as to retain them and prevent them from moving transversely, and so as to promote a good electrical contact with a contact strip 2 and the casing member 10, and good thermal contact.
  • the contact plates 36, 38 have an increased tendency to oppose a force that would act to reduce the retention, electrical contact, of the PTC components 8.
  • a second embodiment of a heater element 1 differs from the first embodiment in that there are two second electrical contact members 10, 10' and each of the members 10, 10' has a side 36, 38 providing a contact plate.
  • the battery contact strip 2 with the frame member 4 thereon is first placed on a fixture (not shown) that is equipped to crimp the corresponding casing member 10.
  • the PTC components 8 are then positioned, followed by the second casing member 10.
  • the first casing member 10 is crimped, controlling the pressure of the displacement to ensure a good electrical contact between the PTC components 8 respectively with the battery contact strip 2 and the first casing member 10.
  • the sub assembly is turned (actually rotated) through 180° and the same operation is repeated. This assembly process has the advantage of ensuring that each piece is well assembled.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Resistance Heating (AREA)
  • Cookers (AREA)

Claims (4)

  1. Ein elektrisches Heizelement (1), das Folgendes beinhaltet:
    mindestens ein PTC-Bauteil (8);
    ein erstes elektrisches Kontaktteil (2), das gegenüberliegende Seiten aufweist;
    mindestens ein zweites elektrisches Kontaktteil (10, 10'), das mindestens zwei elektrische Kontaktplatten (36, 38) bereitstellt;
    dadurch gekennzeichnet, dass mindestens ein erstes Rahmenteil (4) auf einer Seite des ersten elektrischen Kontaktteils (2) bereitgestellt ist und dass mindestens ein zweites Rahmenteil (6) auf der gegenüberliegenden Seite des ersten elektrischen Kontaktteils (2) bereitgestellt ist, und dass das erste und zweite oder jedes erste und zweite Rahmenteil (4, 6) angepasst sind, um das oder jedes PTC-Bauteil (8) zu positionieren;
    wobei das erste elektrische Kontaktteil (2), das erste und zweite oder jedes erste und zweite Rahmenteil (4, 6) und das oder jedes PTC-Bauteil (8) zwischen den mindestens zwei elektrischen Kontaktplatten (36, 38) gehalten werden.
  2. Ein HLK-Modul eines Kraftfahrzeugs, das ein elektrisches Heizelement gemäß Anspruch 1 beinhaltet.
  3. Ein Verfahren zum Zusammenbau eines elektrischen Heizelements, das die Bereitstellung von mindestens einem PTC-Bauteil (8), einem ersten elektrischen Kontaktteil (2), das gegenüberliegende Seiten aufweist, mindestens einem zweiten elektrischen Kontaktteil (10, 10'), das mindestens zwei elektrische Kontaktplatten (36, 38) aufweist, beinhaltet; gekennzeichnet durch die Bereitstellung von mindestens einem ersten Rahmenteil (4) auf einer Seite des ersten elektrischen Kontaktteils (2) und mindestens einem zweiten Rahmenteil auf der gegenüberliegenden Seite des elektrischen Kontaktteils (2), so dass das erste und zweite oder jedes erste und zweite Rahmenteil das oder jedes PTC-Bauteil positionieren, wobei das erste elektrische Kontaktteil (2), das erste und zweite oder jedes erste und zweite Rahmenteil (4, 6) und das oder jedes PTC-Bauteil zwischen den mindestens zwei elektrischen Kontaktplatten (36, 38) gehalten werden.
  4. Ein HLK-Modul eines Kraftfahrzeugs, das ein elektrisches Heizelement beinhaltet, welches gemäß Anspruch 3 zusammengebaut wurde.
EP04256795A 2003-11-03 2004-11-03 Elektrisches Heizelement Not-in-force EP1528838B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0325574.2A GB0325574D0 (en) 2003-11-03 2003-11-03 Electrical heater
GB0325574 2003-11-03

Publications (3)

Publication Number Publication Date
EP1528838A2 EP1528838A2 (de) 2005-05-04
EP1528838A3 EP1528838A3 (de) 2005-05-25
EP1528838B1 true EP1528838B1 (de) 2006-05-31

Family

ID=29725819

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04256795A Not-in-force EP1528838B1 (de) 2003-11-03 2004-11-03 Elektrisches Heizelement

Country Status (4)

Country Link
EP (1) EP1528838B1 (de)
AT (1) ATE328458T1 (de)
DE (1) DE602004001033T2 (de)
GB (1) GB0325574D0 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2629585A1 (de) 2012-02-20 2013-08-21 Bitron S.p.A. Heizvorrichtung, insbesondere zum Aufwärmen der Fahrgastzelle eines PKW, und korrespondierendes Verfahren zur Herstellung dieser Vorrichtung

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005030392A1 (de) * 2005-06-29 2007-01-04 BSH Bosch und Siemens Hausgeräte GmbH Hausgerät sowie Garguträger-Haltevorrichtung für ein Hausgerät
DE502006003627D1 (de) * 2006-10-25 2009-06-10 Catem Gmbh & Co Kg Wärmeerzeugendes Element für eine elektrische Heizvorrichtung und Verfahren zur Herstellung derselben
EP2025541B1 (de) * 2007-07-18 2013-01-02 Eberspächer catem GmbH & Co. KG Wärmeerzeugendes Element einer elektrischen Heizvorrichtung
DE102007040408A1 (de) * 2007-08-27 2009-03-05 Epcos Ag Flexibles Heizmodul und Verfahren zur Herstellung
EP2249618B1 (de) * 2008-01-30 2014-10-29 Koshiro Taguchi Heizung an bord eines fahrzeugs und herstellungsverfahren dafür
EP2346304B1 (de) * 2010-01-15 2016-06-15 MAHLE Behr GmbH & Co. KG Wärmeübertrager
DE102017223785A1 (de) * 2017-12-22 2019-06-27 Eberspächer Catem Gmbh & Co. Kg Verfahren zur Herstellung eines wärmeerzeugenden Elementes
DE102018212012A1 (de) * 2018-07-18 2020-01-23 Eberspächer Catem Gmbh & Co. Kg Wärmeerzeugendes Element und Verfahren zu dessen Herstellung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3677603D1 (de) * 1986-10-01 1991-03-28 David & Baader Dbk Spezfab Kaltleiter-ptc-heizkoerper.
JP2982327B2 (ja) * 1991-02-14 1999-11-22 株式会社村田製作所 複写機の定着用ヒータ装置
DE19732010A1 (de) * 1997-07-25 1999-01-28 Behr Gmbh & Co Elektrische Heizeinrichtung, insbesondere für ein Kraftfahrzeug
DE20121115U1 (de) * 2001-12-21 2003-04-24 Fritz Eichenauer GmbH & Co. KG, 76870 Kandel Elektrische Heizeinrichtung zum Beheizen einer korrosiven Flüssigkeit in einem Kfz

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2629585A1 (de) 2012-02-20 2013-08-21 Bitron S.p.A. Heizvorrichtung, insbesondere zum Aufwärmen der Fahrgastzelle eines PKW, und korrespondierendes Verfahren zur Herstellung dieser Vorrichtung

Also Published As

Publication number Publication date
EP1528838A2 (de) 2005-05-04
GB0325574D0 (en) 2003-12-03
DE602004001033T2 (de) 2006-12-07
ATE328458T1 (de) 2006-06-15
EP1528838A3 (de) 2005-05-25
DE602004001033D1 (de) 2006-07-06

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