EP0307629B1 - Elektro-Kochplatte - Google Patents

Elektro-Kochplatte Download PDF

Info

Publication number
EP0307629B1
EP0307629B1 EP88113197A EP88113197A EP0307629B1 EP 0307629 B1 EP0307629 B1 EP 0307629B1 EP 88113197 A EP88113197 A EP 88113197A EP 88113197 A EP88113197 A EP 88113197A EP 0307629 B1 EP0307629 B1 EP 0307629B1
Authority
EP
European Patent Office
Prior art keywords
hotplate
bore
plate
underside
fastening bolt
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
EP88113197A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0307629A1 (de
Inventor
Robert Kicherer
Felix Schreder
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.)
EGO Elektro Geratebau GmbH
Original Assignee
EGO Elektro Gerate Blanc und Fischer 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
Application filed by EGO Elektro Gerate Blanc und Fischer GmbH filed Critical EGO Elektro Gerate Blanc und Fischer GmbH
Priority to AT88113197T priority Critical patent/ATE86374T1/de
Publication of EP0307629A1 publication Critical patent/EP0307629A1/de
Application granted granted Critical
Publication of EP0307629B1 publication Critical patent/EP0307629B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/10—Tops, e.g. hot plates; Rings
    • F24C15/102—Tops, e.g. hot plates; Rings electrically heated
    • F24C15/104—Arrangements of connectors, grounding, supply wires

Definitions

  • the invention relates to an electric hotplate according to the preamble of claim 1.
  • Such hot plates can be used, for example, for arrangement on a table top in the manner of a built-in cooker or as a cover plate for a stove housing.
  • the hotplates are mounted on the support provided for them from the underside of the mounting plate with this or against the top of the mounting plate before mounting the mounting plate that clamping screws are screwed into the center pin from the bottom.
  • This design allows the hotplate to be assembled from a single side of the mounting plate not, which is why a quick replacement of the hotplate is not possible, since the built-in plate must first be removed or made accessible from the underside.
  • the invention has for its object to provide an electric hotplate of the type mentioned, which allows a quick installation in the mounting plate in a simple manner and with little tool effort and can also be quickly replaced if necessary.
  • the electrical connections for the hotplate can also be made easily from the top of the mounting plate, namely through the plate opening, even if the connection connections are formed by spot welded connections or screw connections.
  • the connecting lines can be, for example, by at least a helically curved section should be designed to be so flexible and extensible that its connection ends for connection to the connections of the hotplate can be brought almost up to the area of the plate opening or even through it to the top of the mounting plate and thus very easily for the production of the connection connections are accessible.
  • connection ends of the connecting lines can also be combined to form a plug which is expediently fastened to the underside of the mounting plate in such a way that when the hotplate is inserted into the plate opening, the electrically conductive plug connections are simultaneously made with the connecting piece of the hotplate.
  • the fastening bolt for bracing the hotplate with respect to the mounting plate can be actuated from the upper side thereof.
  • the hotplate can also be used from the same side, namely from the top.
  • a lower end cover of the hotplate body can be secured or braced essentially directly in relation to the central pin.
  • engaging in the outer circumference of the central pin securing member can be used, which engages from the lower end of the central pin in its inner circumference, in particular in an internal profile, such as an internal thread and has a passage for the fastening bolt, which at the same time so can be adapted to the inner circumference of the securing member that it secures it radially against loosening from the engagement position.
  • the securing member is not formed in one piece with the launching cover, or is formed out of it, it is expediently formed by a sleeve-shaped collar sleeve, the passage of which can be adapted so closely to the outside diameter of the fastening bolt that the securing member opposite it Center pin and thus centered relative to the hotplate body.
  • a connection by, for example, claw-like resilient opening or detonation can also be advantageous.
  • a similar connection can also be provided between the end of the fastening bolt projecting beyond the lower end of the central pin and a counter member which of the mounting bolts is supported against the underside of the mounting plate.
  • a quick release nut is conceivable, for example, so that the fastening bolt for tightening the hotplate does not have to be rotated, or at most only one to a few rotations, and rotation of the fastening bolt is only necessary to loosen the hotplate.
  • the design according to the invention is particularly suitable for those hotplates which have a hotplate body made of cast material with an outer flange edge protruding on the underside and an inner flange edge projecting less far beyond the underside, which surrounds the central pin at a distance, the outer and the second inner flange edge in the underside of the hotplate body at least one spiral groove is provided, in which at least one helical heating resistor is embedded in a pressed insulating compound.
  • the essentially flat cooking surface is expediently ring-shaped in such a way that the hotplate body has a recessed unheated zone on the associated side in the center, namely within the innermost spiral turn of the heating resistors, in which the head of the fastening bolt lies. Except for the through hole which is completely closed in the assembled state by the fastening bolt or its head on the upper side of the hotplate body, the hotplate body is continuously closed on this upper side or in the area of the cooking surface.
  • the electric hotplate 1 is intended for installation in a built-in plate 2, for example a profiled stainless steel plate, which expediently accommodates two or more adjacent hotplates of different sizes and / or power and in the area of the respective hotplate 1 a bump-like one Elevation is deformed, in which a plate opening is provided for inserting the hotplate 1.
  • a built-in plate 2 for example a profiled stainless steel plate, which expediently accommodates two or more adjacent hotplates of different sizes and / or power and in the area of the respective hotplate 1 a bump-like one Elevation is deformed, in which a plate opening is provided for inserting the hotplate 1.
  • the hotplate 1 On the underside of the hotplate 1 reaching through the mounting plate 2 and on the underside of the mounting plate 2 there is at least one bow-shaped or lid-shaped clamping part 3 which serves to brace the hotplate 1 in such a way that it adjoins the limitation of the plate opening at the top of the elevation of the mounting plate 2 rests under tension with a profile ring which projects beyond the outer circumference of a hotplate body 4 of the hotplate 1 and forms the visible circumferential limitation of the hotplate 1.
  • the hotplate body 4 made of cast material, which can be round, for example circular, square or square or similar in plan view, has an annular flange edge 5 projecting at the underside with a small radial distance from its outer circumference, on the outer circumference of which the profile ring is closely adjacent is attached to the top of the hotplate body 4 in such a way that it is supported on an annular shoulder of the hotplate body 4 projecting beyond this outer circumference.
  • an inner flange edge 6 is provided, which projects less far downwards than the flange edge 5.
  • a central pin 7 of the hotplate body 4 which projects downward to the same extent as the outer flange edge 5 and is axially aligned with the flange edge 5.
  • At least one spiral groove is provided between the flange edges 5, 6 in the underside of the hotplate body 4, an elongated heating resistor 8 formed by a wire coil being arranged in the respective spiral groove and is embedded in a pressed insulating compound.
  • the top of the hotplate body 4 forms a ring-shaped, flat cooking surface 9 that extends approximately to its outer circumference and is coaxial with the central axis 10 of the hotplate body 4, the inner circumference of which corresponds approximately to the width of the inner flange edge 6.
  • the hotplate body 4 has on the top side a shallow depression 11 which becomes slightly deeper towards its center.
  • the underside of the hotplate body 4 is or the like with a deep-drawn sheet metal part. formed end cover 12, which can connect to the lower end face of the outer flange 5 or, as shown, to the inner circumference thereof and is axially secured by a fastening connection to the central pin 7 relative to the hotplate body 4.
  • the end cover 12 is penetrated by an insulating sleeve 13 made of ceramic material attached to it, which is penetrated in through openings by two or more adjacent connecting wires 14, the inner ends of which are connected to connecting pins of the heating resistor or 8.
  • the connections 15 do not form, as conceivable, freely protruding single connections, but they are electrically connected, for example by spot welding, to a connecting piece 16, which forms a common plug part for all connections 15.
  • the connector 16 has in an insulating body 17 made of ceramic material, for example steatite, sockets 18, each of which is connected via a connecting lug to an associated connection 15 and which are spaced apart, their plug openings facing away from the central axis 10 Side of the connector 16 are provided.
  • the outer, inherently rigid ends of the connecting wires 14 can form a support arm for the positionally stable mounting of the connecting piece 16.
  • a particularly secure mounting for the connecting piece 16 is provided instead or in addition to this by a support arm 19 which is fastened in the region of the insulating sleeve 13 to the bottom of the end cover 12 and protrudes outward from this fastening point approximately radially to the central axis 10.
  • the support arm 19 for example formed by a sheet metal profile, engages around the insulating body 17 of the connecting piece 16 from the top, so that it is suspended from the outer end of the support arm 19 lying above the connections 15 and is in plan view outside the outer circumference of the remaining hotplate 1.
  • the connecting piece 16 forms a plug part of a quick-connect coupling 20, via which the connections 15 of the hotplate 1 can be electrically conductively connected to the mating connector (s) 22 of a corresponding number of connecting lines 21, which connect the heating resistors 8 for the purpose of power control with one of Connect the manually operated switch.
  • the connecting lines 21 can also be inherently rigid, expediently through braided sheaths be insulated lines and have expansion sections 23 which allow them to be stretched in an essentially resilient manner so that the mating connectors 22 can be pulled at least in the vicinity of the plate opening of the mounting plate 2.
  • the expansion sections 23 can each be formed, for example, by at least one loop-shaped or helically curved longitudinal section of the connecting line 21.
  • each connecting line 21 has a separate mating connector 22, which is not directly connected to the other connecting lines, which can be formed, for example, by an end sleeve and is adapted to the respectively associated socket 18 of the connecting piece 16.
  • the lid-shaped clamping part 3 is located with an outer, annular flat portion of its bottom at a short distance below the connecting piece 16, which, including the support arm 19, lies entirely within the clamping part 3 and extends from the inside to close to its jacket.
  • this jacket an opening is provided for the passage of the connecting line 21 or of the mating connector 22 located completely inside.
  • the jacket merges at the upper end into an outwardly directed, annular disk-shaped channel, with which the tensioning part 3 is supported on the underside of the mounting plate 2 radially outside the elevation.
  • the base has a dome-like elevation for the bracing in relation to the central pin 7.
  • the clamping part 3 has a cage molded out of it for the axially secured reception of a counter-member 24 lying in the central axis 10 in the form of a screw nut, which is a short distance below the hotplate 1 and for the engagement of the hotplate body 4 in the central pin 7 penetrating fastening bolt 25 is used, the truncated cone-shaped head 26 designed as a slotted head sunk relative to the cooking surface 9 so flush with the bottom surface of the recess 11 that it is accessible for actuation with a tool, such as a screwdriver, from the top of the hotplate 1 is.
  • the head 26 lies in a section of a through bore 28 which is designed as a countersunk bore 27 and which penetrates the central pin 7 from the top of the hotplate body 4 to the lower end of the central pin 7 and whose diameter is relatively closely matched to the outer diameter of the threaded shaft of the fastening bolt 25.
  • the through bore 28, as shown in particular in FIG. 2, has a relatively short bore section 29 directly adjoining the counterbore 27, which is closely matched to the outside diameter of the shaft of the fastening bolt 25 with only a slight radial play and to which a slight downward movement occurs another bore section 30 connects, which extends to the lower end of the central pin 7. On a part of its length extending to its lower end, this bore section 30 is provided with an internal profile 31 in the form of an internal thread.
  • a corresponding external thread sleeve part 33 of a locking sleeve 32 is screwed, which passes through a through hole in the bottom of the end cover 12 and tensions this with an annular collar 34 provided at its lower end, possibly with the interposition of a washer, against the lower end face of the central pin 7 .
  • the outer diameter of the collar 34 corresponds approximately to the outer diameter of the lower end of the central pin 7, so that the locking sleeve 32 practically forms a releasable lower continuation of the central pin 7.
  • the enlarged at the lower end bore 35 of the locking sleeve 32 is essentially in the same way as the bore section 29 adapted to the shaft of the fastening bolt 25 and extends only over a lower part of the length of the bore section 30th
  • the hotplate 1 can be brought up from above to the mounting plate 2 lying in the position of use and then electrically connected to the connecting lines 21 in the region of its plate opening with the aid of the quick connection coupling 20. Then the hotplate body 4 is inserted into the plate opening and the fastening bolt 25 is screwed into the counter member 24 of the clamping part 3, which is secured in position with respect to the mounting plate 2, until sufficient tensioning is achieved. Accordingly, the hotplate 1 can also be removed or exchanged for another hotplate, e.g. a different nominal power, but has the same size.
  • the engagement of the support arm 19 in the opening or the cutout of the clamping part 3 also ensures that the hotplate 1 is prevented from rotating with respect to rotational movements about its central axis 10 relative to the mounting plate 2.
  • FIGS. 3 to 6 the same reference numerals are used for corresponding parts as in the other figures, but with different letter indices.
  • the plug sockets 18 of the connecting piece 16 are designed as barbed claw-type clamping sockets
  • the plug connections 18a in the embodiment according to FIG Screw bushings are formed, each having at least one clamping screw for fixing the inserted mating connector 22a of the connecting lines 21a.
  • the connections 15a can each be made by a clamping screw or the like. be fixed so that the connector 16a can be removed as a separate component from the hotplate 1a.
  • the coupling 20b has a connecting piece 16b, the connecting conductor of which penetrates the insulating body 17b with the connections 15b and / or with the counterparts 22b by means of spot welding or the like. can be connected, which can be useful in particular for a fully mechanized assembly by handling machines.
  • the connection piece 16b lies against the underside of the flange edge 5b or the hotplate 1b and is carried essentially directly by the connection wires 14b.
  • all the connecting lines 21c can also be combined in a common mating connector 22c, which is expediently fixed in position with respect to the mounting plate 2c on the underside of the clamping part 3c in the region of its opening in such a way that it bridges this opening.
  • This mating connector 22c can be formed in a simple manner in that the associated ends of the connecting lines 21c are fixed in an insulating housing in such a way that their ferrules protrude parallel to one another and lying next to one another at the predetermined intervals beyond the side of the insulating housing facing the central axis 10c.
  • the clamping part 3c is expediently designed such that it or the edge zones of its opening form a guide for the connecting piece 16c which is parallel to the plug-in direction of the quick-action coupling 20c and which advantageously engages on the support arm 19c and when inserting the hotplate 1c into the mounting plate 2c, the connecting piece 16c is oriented so that it automatically reaches the predetermined mating engagement with the mating connector 22c.
  • training according to the South African patent specification 86/6439 is also conceivable, to which reference is made for further details and effects.
  • the lid-shaped clamping part 3c which passes through the opening of the lower end of the insulating sleeve 13c and laterally guides the support arm 19c, lies with its essentially flat bottom at a short distance below the end cover 12c or the hotplate body 4c and goes on the upper end of its jacket surrounding the flange edge 5 into an outwardly directed, annular disk-shaped edge with which it is supported on the underside of the mounting plate 2c radially outside the elevation having the plate opening.
  • an easily releasable quick-release fastener for example a bayonet-type fastener in the manner of a quick-action screw connection, is also provided for the connection of the fastening bolt 25d to the counter member 24d, which requires less than one turn of the fastening bolt 25d for bracing the hotplate 1d.
  • the counter member 24d is designed as a sleeve which passes through the bottom of the clamping part 3d and is supported on the underside thereof by an annular collar.
  • slots are provided with an incline for receiving pegs which protrude beyond the outer circumference of the fastening bolt 25d, one end of the respective slot extending over an approximately axial insertion section to the upper end face of the counter member 24d.
  • the clamping part 3d suitably encloses one empty cavity, but can also serve to accommodate a heat-insulating material which essentially fills the space between the end cover 12d and the clamping part 3d.
  • the washer for the locking sleeve 32d can also be formed by the fastening end of an earthing terminal lug which, according to FIG. 6, penetrates the thermal insulation and projects downward over the underside of the clamping part 3d.
  • a seal or a sealing material can be provided between the head 26 of the fastening bolt 25 and the associated bore section, namely the countersunk bore 27, which also provides a self-locking mechanism for the Fastening bolt 25 guaranteed against accidental loosening.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Baking, Grill, Roasting (AREA)
  • Resistance Heating (AREA)
  • Massaging Devices (AREA)
  • General Induction Heating (AREA)
  • Cookers (AREA)
EP88113197A 1987-09-05 1988-08-13 Elektro-Kochplatte Expired - Lifetime EP0307629B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88113197T ATE86374T1 (de) 1987-09-05 1988-08-13 Elektro-kochplatte.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8712088U DE8712088U1 (de) 1987-09-05 1987-09-05 Elektro-Kochplatte
DE8712088U 1987-09-05

Publications (2)

Publication Number Publication Date
EP0307629A1 EP0307629A1 (de) 1989-03-22
EP0307629B1 true EP0307629B1 (de) 1993-03-03

Family

ID=6811826

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88113197A Expired - Lifetime EP0307629B1 (de) 1987-09-05 1988-08-13 Elektro-Kochplatte

Country Status (6)

Country Link
US (1) US4931620A (ja)
EP (1) EP0307629B1 (ja)
JP (1) JPS6489177A (ja)
AT (1) ATE86374T1 (ja)
AU (1) AU612691B2 (ja)
DE (2) DE8712088U1 (ja)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4993553A (en) * 1988-02-09 1991-02-19 E.G.O. Elektro Gerate Blanc U. Fischer Electric hotplate stacking aid
DE3803806A1 (de) * 1988-02-09 1989-08-17 Ego Elektro Blanc & Fischer Elektrokochplatte
DE3824748A1 (de) * 1988-07-21 1990-01-25 Ego Elektro Blanc & Fischer Elektro-kochplatte
DE3909374A1 (de) * 1989-03-22 1990-09-27 Ego Elektro Blanc & Fischer Elektrokochplatte
DE3916725A1 (de) * 1989-05-23 1990-12-06 Ego Elektro Blanc & Fischer Elektrokochplatte
DE4008830A1 (de) * 1990-03-20 1991-09-26 Ego Elektro Blanc & Fischer Elektrokochplatte
EP3206459B1 (de) * 2016-02-10 2019-04-03 E.G.O. ELEKTRO-GERÄTEBAU GmbH Kochplatte und kochfeld mit einer kochplatte

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1344282A (en) * 1916-05-05 1920-06-22 Conlon Electric Washer Company Electric heating element
US2177173A (en) * 1936-03-23 1939-10-24 Electromaster Inc Electric heater
DE692301C (de) * 1936-10-02 1940-06-17 Aeg Elektrisch beheizter Herd mit Messerkontaktkochplatten
US2325358A (en) * 1941-04-10 1943-07-27 Edison General Elec Appliance Heating device
FR53905E (fr) * 1944-12-20 1947-01-13 Procédé de construction d'éléments chauffants électriques pour usages domestiques et industriels et produits obtenus par ce procédé
US2422057A (en) * 1945-12-15 1947-06-10 Carl J Weinhardt Electric heating unit
FR924450A (fr) * 1946-03-26 1947-08-05 Etablissements R D V Soc D Appareil électrique de cuisson, tel que réchaud ou cuisinière
AT196981B (de) * 1956-06-21 1958-04-10 Austria Email Ag Elektrisch beheizte Kochplatte
DE2442717A1 (de) * 1974-09-06 1976-03-18 Karl Fischer Elektrische heizplatte fuer elektroherde
DE2933296A1 (de) * 1979-08-17 1981-02-26 Karl Fischer Elektrokochplatte
DE2933349C2 (de) * 1979-08-17 1984-09-27 Fischer, Karl, 7519 Oberderdingen Elektrokochplatte
ES278931Y (es) * 1984-04-18 1985-06-01 Teka Industrial, S.A. Dispositivo de fijacion superior rapida de placa electrica
DE3540816A1 (de) * 1985-11-16 1987-05-21 Ego Elektro Blanc & Fischer Elektrokochplatte sowie vorrichtung fuer deren anschluss

Also Published As

Publication number Publication date
US4931620A (en) 1990-06-05
EP0307629A1 (de) 1989-03-22
AU2176088A (en) 1989-03-09
ATE86374T1 (de) 1993-03-15
JPH0572076B2 (ja) 1993-10-08
DE3878801D1 (de) 1993-04-08
DE8712088U1 (de) 1987-10-22
AU612691B2 (en) 1991-07-18
JPS6489177A (en) 1989-04-03

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