EP0651589B1 - Selbstschutz für elektrisches Heizelement, insbesondere für Waschmaschinen, Wasserheizer und dergleichen - Google Patents

Selbstschutz für elektrisches Heizelement, insbesondere für Waschmaschinen, Wasserheizer und dergleichen Download PDF

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Publication number
EP0651589B1
EP0651589B1 EP94830351A EP94830351A EP0651589B1 EP 0651589 B1 EP0651589 B1 EP 0651589B1 EP 94830351 A EP94830351 A EP 94830351A EP 94830351 A EP94830351 A EP 94830351A EP 0651589 B1 EP0651589 B1 EP 0651589B1
Authority
EP
European Patent Office
Prior art keywords
self
protection
copper terminal
coupled
heating 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.)
Expired - Lifetime
Application number
EP94830351A
Other languages
English (en)
French (fr)
Other versions
EP0651589A3 (de
EP0651589A2 (de
Inventor
Claudio Merloni Termosanitari S.P.A. Capitanelli
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.)
Thermowatt SpA
Original Assignee
Thermowatt SpA
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Publication date
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Application filed by Thermowatt SpA filed Critical Thermowatt SpA
Publication of EP0651589A2 publication Critical patent/EP0651589A2/de
Publication of EP0651589A3 publication Critical patent/EP0651589A3/de
Application granted granted Critical
Publication of EP0651589B1 publication Critical patent/EP0651589B1/de
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
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0202—Switches
    • H05B1/0205—Switches using a fusible material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
    • H01H37/761—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit
    • 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
    • H05B3/78—Heating arrangements specially adapted for immersion heating
    • H05B3/82—Fixedly-mounted immersion heaters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
    • H01H37/761—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit
    • H01H2037/762—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit using a spring for opening the circuit when the fusible element melts

Definitions

  • the present invention concerns a self-protection system including a resistive electrical heater element, particularly a heater element for washing machines, water heaters and like.
  • the invention consists in an improvement of a system of the above kind that allows to obtain a optimum protection in case of anomalous working of the electrical heater element.
  • the manufacturers provide that the self-protection system must intervene within a preestablished time, particularly 75 seconds, from the moment when the dry working of the electrical heater element starts, in order to avoid that the clothes within the washing machine or the adjacent plastic parts take fire.
  • thermofusible element out of the heater element was provided as a self- protection element.
  • a heating element which provides a temperature limiting device contained within the sheath that contains the heating element, and serially connected whit the resistance.
  • the self-protection element is very close to the heating zone, so that once the interruption is intervened, a remarkable thermal inertia verifies determining an increasing of the temperature of the body of the self-protection element.
  • thermofusible element In consequence of this fact a temperature remarkably higher than the exercise temperature is present inside, so that in view of the structural features of the thermofusible element, it is out of work also after its intervention.
  • the Applicant has thought and realized a technical solution that obviates all the mentioned drawbacks.
  • the solution according to the present invention provides that the self-protection element is placed again out of the external casing containing the heater element, but the coupling with the latter has been conceived and realized in such a way to be sure to fulfil with absolute certainty the intervention times provided.
  • a self-protection system including a resistive electrical heater element, particularly a heater element for washing machines, water heaters and like, which comprises a copper terminal element having a substantially extended shape, one end of which is coupled to a terminal of the resistive electrical heater element; an external casing enclosing the electrical heater element and the copper terminal element; a self-protection element coupled to the other end of said copper terminal element in such a way that the self-protection element is placed externally with respect to the external casing; an outer ring-shaped insulating body having thermal and electric insulation properties, said body overlapping the self-protection element and being connected to said external casing; a closure element placed over the end of the self-protection element that is not coupled to the copper terminal element, said closure element being coupled with said body.
  • the self-protection element is made up of a thermofusible element coupled to said copper terminal element by clinching.
  • the reference 1 indicates a resistive electrical heater element inside an external casing 6 of an electric heating element; the said resistive electrical heating element, here formed as a spiral, is only partially shown, the drawing showing an end part of the said external casing 6 only.
  • the resistive electrical heater element 1 is coupled at one end of a copper terminal element 2.
  • a sealing material 3 is provided about the said copper terminal element.
  • a self-protection element 4 is coupled by clinching, and about said self-protection element 4 a ring-shaped hollow insulating body 5, realized with a material having good properties of thermal and electric insulation, is provided.
  • the hollow insulating body 5 is partly coupled within the external casing 6 of the resistive electrical heater element 1, overlapping with the copper terminal element 2, while the self-protection element 4 is external with respect to the said external casing 6.
  • a metallic ring 7 or closure element is provided, said ring being moulded as an insert of the hallow insulating body 5, and external to said ring 7 a faston is welded.
  • the self-protection element 4 being external with respect to the external casing 6, does not rearm, while the kind of coupling with the resistive electrical heater element 1 allows to have an optimum activation time contrary to the prior art solutions.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Resistance Heating (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Control Of Resistance Heating (AREA)

Claims (5)

  1. Ein Selbstschutzsystem, einschließlich eines elektrischen Heizwiderstands, insbesondere ein Heizelement für Waschmaschinen, Warmwasserbereiter und ähnliches; das System umfasst ein Abschlusselement (2) aus Kupfer mit wesentlich gestreckter Form, wobei ein Ende desselben an dem elektrischen Heizwiderstand (1) angebracht ist; ein äußeres Gehäuse (6) umschließt das elektrische Heizelement (1) sowie das Abschlusselement (2) aus Kupfer; ein Selbstschutzelement (4), das an das andere Ende des besagten Abschlusselements aus Kupfer angebracht ist, dadurch gekennzeichnet, dass das Selbstschutzelement (4) außerhalb des äußeren Gehäuses (6) angebracht ist; ein äußerer ringförmiger Isolierungskörper (5), der thermische und elektrisch isolierende Eigenschaften aufweist, der das Selbstschutzelement (4) überlappt; besagter Körper ist an besagtem äußerem Gehäuse (6) angebracht; ein Schließelement (7) ist über dem Ende des Selbstschutzelements (4) angebracht, das nicht mit dem Abschlusselement (2) aus Kupfer verbunden ist, wobei das besagte Schließelement (7) mit dem besagten Körper (5) venbunden ist.
  2. Selbstschutzsystem gemäß Anspruch 1, dadurch gekennzeichnet, dass das Selbstschutzelement (4) aus einem wärmeschmelzbarem Element gefertigt ist, das am dem Abschlusselement (2) aus Kupfer angeklemmt ist.
  3. Selbstschutzsystem gemäß Anspruch 1, dadurch gekennzeichnet, dass Schließelement (7) eine Oberfläche aufweist, die sich für die Anbringung eines Anschlusses für die Stromkabel des elektrischen Heizelements (1) eignet.
  4. Selbstschutzsystem gemäß Anspruch 1, dadurch gekennzeichnet, dass das Schließelement (7) mit dem äußeren Gehäuse (6) über einen hohlen Isolierungskörper (5) verbunden ist, der das Abschlusselement (2) aus Kupfer und das Selbstschutzelement (4) umgibt.
  5. Selbstschutzsystem gemäß den Ansprüchen 1 bis 4, dadurch gekennzeichnet, dass in den vorhandenem Raum zwischen der Innenfläche des hohlen Isolierungskörpers (5) und dem inneren Abschlusselement (2) aus Kupfer ein Versiegelungsmaterial (3) eingefüllt wird; der Zweck des besagten Versiegelungsmaterials ist der Schutz des elektrischen Heizwiderstands (1) sowie des Abschlusselements (2) aus Kupfer vor Feuchtigkeit.
EP94830351A 1993-10-29 1994-07-11 Selbstschutz für elektrisches Heizelement, insbesondere für Waschmaschinen, Wasserheizer und dergleichen Expired - Lifetime EP0651589B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITRM930716A IT1262417B (it) 1993-10-29 1993-10-29 Sistema di autoprotezione per elemento riscaldante di tipo elettrico, in particolare elemento riscaldante per lavabiancheria, scaldabagni e simili.
ITRM930716 1993-10-29

Publications (3)

Publication Number Publication Date
EP0651589A2 EP0651589A2 (de) 1995-05-03
EP0651589A3 EP0651589A3 (de) 1995-10-04
EP0651589B1 true EP0651589B1 (de) 2002-04-17

Family

ID=11402028

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94830351A Expired - Lifetime EP0651589B1 (de) 1993-10-29 1994-07-11 Selbstschutz für elektrisches Heizelement, insbesondere für Waschmaschinen, Wasserheizer und dergleichen

Country Status (7)

Country Link
EP (1) EP0651589B1 (de)
AT (1) ATE216552T1 (de)
DE (1) DE69430415T2 (de)
DK (1) DK0651589T3 (de)
ES (1) ES2174867T3 (de)
IT (1) IT1262417B (de)
PT (1) PT651589E (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29707829U1 (de) * 1997-05-01 1997-07-10 Tovarna Elektrotermicnih Aparatov Eta Cerkno D.O.O., Cerkno Rohrheizkörper mit eingebauter Überhitzungssicherung
FR2803976B1 (fr) * 2000-01-13 2002-05-17 Seb Sa Element chauffant avec integration d'un dispositif de securite thermique
PL3109564T3 (pl) * 2015-06-24 2020-02-28 Bleckmann Gmbh & Co. Kg Urządzenie końcowe do rurowego urządzenia grzewczego ze zintegrowanym bezpiecznikiem

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2101062A1 (de) * 1971-01-11 1972-07-27 Tuerk & Hillinger Kg Elektrischer Rohrheizkörper mit Temperaturbegrenzer
GB2098436A (en) * 1981-05-07 1982-11-17 Ti Russell Hobbs Ltd Electrical heating element
DE9013601U1 (de) * 1990-09-28 1991-01-24 Conti Elektra Heizelemente GmbH, 6483 Bad Soden-Salmünster Elektrischer Rohrheizkörper
DE4243894A1 (en) * 1991-12-24 1993-07-15 Eltra Gmbh & Co Kg Leicht & Tr Tubular heater with a thermal cut=out - has temp. dependent circuit breaker in tube screwed onto heating coil terminal in heater jacket.

Also Published As

Publication number Publication date
PT651589E (pt) 2002-09-30
IT1262417B (it) 1996-06-19
ATE216552T1 (de) 2002-05-15
DE69430415T2 (de) 2002-11-14
DE69430415D1 (de) 2002-05-23
EP0651589A3 (de) 1995-10-04
DK0651589T3 (da) 2002-07-29
ITRM930716A0 (it) 1993-10-29
ITRM930716A1 (it) 1995-04-29
EP0651589A2 (de) 1995-05-03
ES2174867T3 (es) 2002-11-16

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