EP0153572A2 - Abdichtende Befestigungsvorrichtung für einen Heizstab in einem elektrischen Haushaltsapparat, insbesondere einer Waschmaschine - Google Patents

Abdichtende Befestigungsvorrichtung für einen Heizstab in einem elektrischen Haushaltsapparat, insbesondere einer Waschmaschine Download PDF

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Publication number
EP0153572A2
EP0153572A2 EP85100393A EP85100393A EP0153572A2 EP 0153572 A2 EP0153572 A2 EP 0153572A2 EP 85100393 A EP85100393 A EP 85100393A EP 85100393 A EP85100393 A EP 85100393A EP 0153572 A2 EP0153572 A2 EP 0153572A2
Authority
EP
European Patent Office
Prior art keywords
heater element
opening
sealing gasket
tub
gasket
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.)
Withdrawn
Application number
EP85100393A
Other languages
English (en)
French (fr)
Other versions
EP0153572A3 (de
Inventor
Lucio Valent
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.)
Industrie Zanussi SpA
Original Assignee
Industrie Zanussi SpA
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 Industrie Zanussi SpA filed Critical Industrie Zanussi SpA
Publication of EP0153572A2 publication Critical patent/EP0153572A2/de
Publication of EP0153572A3 publication Critical patent/EP0153572A3/de
Withdrawn legal-status Critical Current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
    • H05B3/02—Details
    • H05B3/04—Waterproof or air-tight seals for heaters

Definitions

  • the invention relates to a simple device for sealingly securing an electric heater element in an electric house- hood appliance, particularly a laundry washing machine.
  • the heating of the liquid contained in a receptacle of an electric household appliance such as a laundry washing machine, a diswashing machine, a boiler or the like is usually accomplished by means of armoured electric heater elements removably mounted in the interiro of the respective receptacle.
  • the mounting of such heater elements in the laundering tub of a laundry washing machine is accomplished by introducing the heater element through an opening formed for this purpose in the lower part of the tub and subsequently sealing this opening by means of at least one sealing.gasket surrounding the respective heater element and dimensioned so as to snugly fit into the opening.
  • the sealing gasket is finally secured to the wall of the tub by means of at least one metal flange compressively engaged with the gasket by means of screws and nuts or similar fasteners.
  • a securing device of this construction is rather complicated and cumbersome in use.
  • the gasket held under compression against the wall of the tub indeed tends to be permanently deformed, thereby rendering difficult the extraction of the heater elements from the tub as may be required for maintenance operations and/or replacement of the heater elements themselves.
  • the thus deformed sealing gasket is no longer capable of ensuring the hermetic closure of the tub opening after a certain operating lifetime of the heater elements.
  • securing devices of various types, all of which substantially comprise an elastic sealing gasket of annular shape and locking elements for the gasket, such as flanges, sleeves and the like which are slipped onto the heater element and act on the sealing gasket from the interior of the receptacle so as to keep it compressed against the wall of the receptacle.
  • These securing devices additionally include at least one resilient element which is slipped onto the heater element from the exterior of the tub for securing the heater element in position.
  • the edge of the opening formed in the tub has to be deformed so as to obtain a seat for engagement by the sealing gasket in order to achieve a hermetic seal between the heater element and the surrounding opening in the receptacle of the electric household appliance.
  • a further disadvantage of this type of securing device consists in the fact that eventually required maintenance or repair operations or the replacement of the heater elements and/or the securing device are rather difficult.
  • dismounting of the heater elements and of the securing devices cannot be accomplished solely from outside the electric houshold appliance, as would be desirable, but requires certain operations to be carried out inside the receptacle of the appliance, which again may require the receptacle itself to be dismounted in the first place.
  • a device for sealingly securing at least one electric heater element in an electric household appliance particularly a laundry washing machine having a laundering tub formed with at least one opening for said heater element to extend therethrough into said tub
  • said device comprising at least one resilient fastener element for said heater element and at least one sealing gasket provided with a circumferential lip for releasable engagement with the peripheral edge of said opening for hermetically sealing the latter, said sealing gasket being formed with a passage for said heater element to pass therethrough.
  • a device of this type is characterized in that said passage is formed with a toothed portion cooperating with said heater element for providign a hermetic seal therebetween, and in that said resilient fastener element is designed to be snap-fitted onto said heater element and within a corresponding cavity of said sealing gasket so as to compress said lip against said peripheral edge.
  • Diagrammatically shown in fig. 1 is part of the lower portion 3 of the laundering tub of a laundry washing machine of a conventional type, the wall of which is formed with an elongate opening .4 having rounded ends 5 and 6 . Opening 4 is adapted to receive therein a number of tubular armoured heater elements 7, 8, 9, 10 required for heating the washing liquid ccntained in the tub.
  • the heater elements are remcvatly secured in place by means of the securing device according to the invention, comprised substantially of an elastic sealing gasket 11 made of rubber or any other suitable material, and dimensioned to snugly fit into openign 4 for hermetically sealing it, and a resilient fastener element 12 of conventional type made of a metallic material and having the saem configuration, although at smaller dimensions, as opening 4.
  • resilient fastener element 12 is formed with a plurality of sets of resilient fingers 13, 14, 15, 16 at the respective locations of heater elements 7, 8, 9, 10, the function of said fingers to be described hereinafter.
  • Fastener element 12 additionally serves for connecting the heater elements to ground and is to this purpose provided with a terminal portion 17 adapted to have a grounding conductor (not shown) of the machine connected thereto.
  • sealing gasket 11 is formed with a circumferential lip 18 having the same profile, at larger dimensions, as opening 4, and surrounded by a circumferential channel 19 adapted to engagingly receive the peripheral edge 20 of the opening so as to retain the gasket in place.
  • the other end portion 21 of gasket 11 is of smaller diameter than lip 18 and connected thereto by a divergent portion 22 and a substantially parallel-walled portion 23.
  • end portion 21 of gasket 11 is formed with respective passages for the heater elements to extend therethrough.
  • the passage of end portion 21 is of cylindrical shape and provided with a toothed portion 24 opening into a cavity 25 of gasket 11, the purpose of which will be described as the description proceeds.
  • the profile of cavity 25 substantially corresponds to that of the resilient fingers 14 of resilient fastener element 12, permitting the resilient fingers to be removably in- serte- into the cavity.
  • heater element 8 is thus at first inserted into toothed passage portion 24 of sealing gasket 11 t6 the desired position. Subsequently the resilient fingers 14 of fastener element 12 are introduced into cavity 25, so that curved portions 26 and 27 thereof, respectively, come into snap-engagement with the interior wall of cavity 25 and the exterior surface of heater element 8.
  • the toothed passage portion 24 on its part is resiliently constrained into contact with the outer surface of heater element 8 so as to provide a hermetic seal therebetween.
  • the heater element 8 and the interior part of sealing gasket 11 are then introduced into opening 4, with the sealing gasket and resilient fingers kept in a compressed state, so as to engage peripheral edge 20 of opening 4 with peripheral channel 19 of gasket 11 to achieve a hermetic seal therebetween.
  • the device according to the invention for securing heater elements in a household appliance or the like is of simple construction and simple in operation, consisting as it does of only two components, namely, the gasket and the resilient fastener element described above.
  • the securing device according to the invention permits the heater elements to be readily and quickly installed in the receptacle of an electric household appliance, i.e. the tub of a laundry washing machine without the necessity of preliminarily deforming the edges of an opening formed to this purpose, and without permanent deformation of the sealing gasket as in prior art.
  • the mounting of the heater elements and the dismounting thereof for maintenance or replacement is accomplished by acting solely from the exterior of the tub or receptacle, and without the necessity of preliminarily dismounting the receptacle for gaining access to the interior thereof.

Landscapes

  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Gasket Seals (AREA)
EP85100393A 1984-02-27 1985-01-16 Abdichtende Befestigungsvorrichtung für einen Heizstab in einem elektrischen Haushaltsapparat, insbesondere einer Waschmaschine Withdrawn EP0153572A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT3401384U 1984-02-27
IT3401384U IT8434013V0 (it) 1984-02-27 1984-02-27 Dispositivo per il fissaggio ermetico di un elemento riscaldante per elettrodomestici, in particolare macchine lavabiancheria.

Publications (2)

Publication Number Publication Date
EP0153572A2 true EP0153572A2 (de) 1985-09-04
EP0153572A3 EP0153572A3 (de) 1987-08-12

Family

ID=11238636

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85100393A Withdrawn EP0153572A3 (de) 1984-02-27 1985-01-16 Abdichtende Befestigungsvorrichtung für einen Heizstab in einem elektrischen Haushaltsapparat, insbesondere einer Waschmaschine

Country Status (2)

Country Link
EP (1) EP0153572A3 (de)
IT (1) IT8434013V0 (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1089090B (de) * 1959-04-06 1960-09-15 Miele & Cie Vorrichtung zur Heizkoerperbefestigung, insbesondere fuer Rohrheizkoerper, in der Wandoeffnung von Behaeltern
DE1815429A1 (de) * 1967-12-28 1969-07-24 Elpag Ag Chur Elektrischer Heizeinsatz
FR2115623A5 (de) * 1970-11-26 1972-07-07 Ego Elekt Gerate Blanc
US3997760A (en) * 1974-12-06 1976-12-14 Electro-Therm, Inc. Electric heating element with bulkhead mounting means

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1089090B (de) * 1959-04-06 1960-09-15 Miele & Cie Vorrichtung zur Heizkoerperbefestigung, insbesondere fuer Rohrheizkoerper, in der Wandoeffnung von Behaeltern
DE1815429A1 (de) * 1967-12-28 1969-07-24 Elpag Ag Chur Elektrischer Heizeinsatz
FR2115623A5 (de) * 1970-11-26 1972-07-07 Ego Elekt Gerate Blanc
US3997760A (en) * 1974-12-06 1976-12-14 Electro-Therm, Inc. Electric heating element with bulkhead mounting means

Also Published As

Publication number Publication date
IT8434013V0 (it) 1984-02-27
EP0153572A3 (de) 1987-08-12

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Inventor name: VALENT, LUCIO