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EP0070042A2 - Plaque de cuisson électrique - Google Patents

Plaque de cuisson électrique Download PDF

Info

Publication number
EP0070042A2
EP0070042A2 EP82108179A EP82108179A EP0070042A2 EP 0070042 A2 EP0070042 A2 EP 0070042A2 EP 82108179 A EP82108179 A EP 82108179A EP 82108179 A EP82108179 A EP 82108179A EP 0070042 A2 EP0070042 A2 EP 0070042A2
Authority
EP
European Patent Office
Prior art keywords
hotplate
cover plate
electric
electric hotplate
edge
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.)
Granted
Application number
EP82108179A
Other languages
German (de)
English (en)
Other versions
EP0070042A3 (en
EP0070042B1 (fr
Inventor
Karl Fischer
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 DE8080104743T priority Critical patent/DE3064273D1/de
Publication of EP0070042A2 publication Critical patent/EP0070042A2/fr
Publication of EP0070042A3 publication Critical patent/EP0070042A3/de
Application granted granted Critical
Publication of EP0070042B1 publication Critical patent/EP0070042B1/fr
Expired 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
    • H05B3/68—Heating arrangements specially adapted for cooking plates or analogous hot-plates
    • 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
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/06—Arrangement or mounting of electric heating elements
    • F24C7/067—Arrangement or mounting of electric heating elements on ranges
    • 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
    • H05B3/68—Heating arrangements specially adapted for cooking plates or analogous hot-plates
    • H05B3/70—Plates of cast metal

Definitions

  • the invention relates to an electric hotplate with a hotplate body and a lower cover plate and an insulating piece protruding from the cover plate for the passage of the electrical hotplate connecting lines through the cover plate.
  • the object of the invention is to further enlarge the possibilities for installing the electric hot plates by installing electric hot plates in cooking hobs with extremely high and extremely flat hotplate installation. Furthermore, the storage and transport options for such hot plates should be improved.
  • the heat-resistant insulated connecting leads leading out of the electric hotplate are flexible and lead to a common, freely moveable connecting piece with connecting terminals, and in that the connecting lines are sufficiently long to arrange the connecting piece outside the area of the electric hotplate .
  • the invention provides a connection in which the connector can be moved flexibly and adapts to all installation requirements, but is located in the immediate vicinity of the hotplate, in such a way that it is on the one hand outside the heated area of the hotplate, but on the other hand during installation does not bother.
  • the fact that the hotplate is already supplied with the connection piece installed means that the connection lines have good guidance and do not tend to kink or the like.
  • the connector can be bent so that it does not have a greater height than the electric hotplate itself. It can either be folded outward in the spaces formed between the round hotplates or folded inward in a recess in the cover plate of the hotplate lie. It contributes to the fact that the individual, insulated connecting lines lie next to one another in the form of a flexible band which can be easily pivoted inwards and outwards and forms a very clear connection. Another advantage is that the electric hot plate no longer needs to protrude beyond its outer circumference, permanently mounted parts, so that they can also automatically easily or the like in the installation opening of a hob. can be installed.
  • the hotplate can be further improved for particularly space-saving and safe transport by arranging a recess in the lower cover plate which is directed towards the inside of the electric hotplate and is designed to accommodate the connecting piece.
  • the connecting piece can not only be safely stored, but also almost be sunk into the cover plate so that it does not increase the stacking height of hotplates stacked on top of one another.
  • the insulating piece which, in the case of a design without an external temperature limiter, still protrudes somewhat beyond the underside of the cover plate, also increases the overall height. It was therefore necessary to stack the hot plates on top of one another during their storage and transport in such a way that small sticks with slots are inserted over the downwardly projecting outer edge of the hot plate body, two hot plates lying opposite one another with the undersides being thereby stacked on top of one another. This stacking method not only required considerable manual work, but was also not particularly space-saving and did not result in a very safe stack.
  • the depression in the cover plate can advantageously be arranged at a distance corresponding to the radial distance of the insulating piece from the hotplate center.
  • the hotplate can be stacked at a height that is not even their own Total height corresponds. It is also possible to stack the hot plates exactly in the axial direction, which was not previously possible, so that the outer edges of the hot plate bodies are supported in alignment with one another with the interposition of a centering packing plate. The result is a massive, safe stack that lowers transport and storage costs and increases accident safety.
  • an electric hot plate 11 which has an existing cast-iron cooking plate body 12 having an upper planar and closed cooking surface .13.
  • the unheated central zone 14 is lowered, so that an annular cooking surface is formed.
  • the hotplate body overlaps on its outer circumference via an overflow edge 15 made of sheet material of essentially U-shaped cross section, which is supported on the raised opening edge 16 of the worktop 17 of an electric cooker or hob.
  • the hotplate In the heated ring area, the hotplate is provided with spirally extending ribs, which likewise form spiral grooves 18 between them, in which heating coils 19 lie in a ceramic investment 20.
  • the rim 21 a Aussparung26 in the form of a quadrilateral cutout ( Figure 8) into which a corresponding shaping 27 sets of the cover plate and thus ER- despite a relatively tight seal for a V-rotation of the cover plate 24 on the hotplate body worries.
  • the shape 27 of the cover plate in turn ensures that the finished hotplate can be aligned in the circumferential direction when it is being handled during manufacture. As a result, no inner projection is necessary at the edge 21.
  • the step 25 is followed by an area 28 of the cover plate which springs back relative to the edge area 23 and is adjoined by a central area 29 which projects somewhat from the edge area 23.
  • the hotplate body has a downwardly projecting pin 30, into which a blind threaded bore 31 projects from below.
  • a hollow cap screw 32 which is shown in detail in FIG. 9, is screwed into this threaded bore. It consists of a sheet metal stamping or deep-drawn part with a flange-like head region 33 with a hexagon key surface and an adjoining sleeve-shaped threaded section 34, into which an internal and external thread is pressed or pressed.
  • the screw 32 protrudes through a central hole 36 of the cover plate 24 and is screwed into the thread 35 of the bore 31, so that the cover plate 24 is pressed with its edge region 23 against the lower edge 22 of the edge 21 of the hotplate body 12.
  • a sheet metal part 37 (Fig.2) is interposed, which has the shape of a sheet metal strip, which has a hole 38 on one side through which the Screw 32 protrudes, while the other end is somewhat tapered and includes a ground line 40 with a bent end 39 (Fig.1 and 2).
  • the grounding line can be pressed or welded to the sheet metal part 37.
  • This sheet metal part is simply placed under the screw head 33 in the manner of a washer and enables a secure earth connection. It is particularly advantageous that the sheet metal part lies flat against the underside of the cover plate 24 during manufacture and shipping and only when it is some of this is required. Therefore, the ground terminal B increases the au- the hotplate height irrelevant.
  • FIG. 9 it is shown on the left-hand side that the contact surface of the head 33 can be provided with a preferably star-shaped corrugation 41. Accordingly, the sheet metal part 37 is provided on its top and bottom and the cover plate 24 (see Fig. 2 and 15), whereby the screw 32 is secured against accidental loosening.
  • the screw 32 is secured against accidental loosening.
  • the hotplate is held in the worktop opening receiving it by a bracket 42, which is supported on the underside of the worktop 17 and has a flat U-shape. Its long back is stiffened by side bends 43.
  • a cap screw 45 projects through a hole 44 in the middle of the bracket and is screwed into the internal thread in the hollow screw 32.
  • the screw 32 is a simple stamped sheet metal part and the screw 45 is a simple machine screw. So far, the hot plates were provided with bolts that were screwed into the pin 30 and which protruded far beyond the underside of the hotplate.
  • An upwardly projecting pin 47 is riveted to the bracket 42, which engages in a sleeve-like recess 46, which is integrally formed inwardly from the cover plate and thus secures the hotplate against rotation against the bracket.
  • a plurality of depressions 46 can be provided on the circumference, possibly also offset from one another by 90 °.
  • Fig. 3 shows a variant for the recess 46, which can be selected if the sheet metal from which the cover plate 24 is made should not be subjected to excessive deformation.
  • a separately manufactured sleeve 46 ' is tightly fastened in an opening of the cover plate 24 by a two-sided flange 46 ". It is also possible to provide the sleeve, for example in the region of the flange 46", with a pressed-in thread for subsequently screwing in a pin.
  • F ig. 4 shows in a detailed representation that between the edge region 23 of the cover plate 24 and the lower edge 22 of the hotplate edge 21, a sealing ring 25 is interposed, which can have a flat or circular cross-sectional shape and consists of a heat-resistant sealing material. Silicone rubber, asbestos-containing sealing materials etc. are suitable for this.
  • FIGS. 5 and 6 Further seal designs are shown in FIGS. 5 and 6, wherein in FIG. 5 the seal 25a consists of a paste which has been introduced into the angle between the edge region 23 and the step 25 and which, when pressed on, passes over the lower edge 22 and the inside of the edge 21 distributed. In this embodiment, the possibility of sealing in the region of the recess 26 is particularly advantageous.
  • Fig. 6 shows the corresponding position for a pre sealing ring 25b with a Z-shaped cross-section which covers the lower edge 22, the inside of the rim 21 and a piece of the inner surface of the recessed portion '28 of the shroud 24th
  • This sealing ring can consist of a molding compound which is made from an alumina-silicate fiber and is impregnated with a varnish based on silicone resin.
  • the seal is designed to prevent moisture from penetrating into the interior 48 of the hotplate and thus possibly into the investment material 20 if the hotplate is exposed to extreme conditions, for example sea transport. Although the hotplate immediately expels any moisture that may have entered itself without generating previously unacceptable leakage currents, the seal represents an additional security.
  • the seal is made possible in particular by the cover plate resting on the lower flange. characterized because the seal is em- temperature in a range of lower T and can be better interpreted. Previous cover plates were on the underside of the investment material 20. Level 25 ensures additional sealing and perfect centering.
  • edge 21 'of the hotplate body has a step-shaped recess 49 on its inner underside, so that an outer circumferential edge portion 50 of the edge 21' is formed, which extends somewhat further downward than the contact surface for the edge region 23 of the cover plate 24.
  • edge 21 'of the hotplate body has a step-shaped recess 49 on its inner underside, so that an outer circumferential edge portion 50 of the edge 21' is formed, which extends somewhat further downward than the contact surface for the edge region 23 of the cover plate 24.
  • the layer 52 In case of extreme conditions regarding moisture if there is no fear, it is possible to produce the layer 52 from highly heat-resistant insulating materials, for example inorganic fibers such as asbestos or other known islier materials. Together with the metal foil lying on top, a very effective insulation is formed, which further reduces the heat losses due to radiation and convection downwards, which are in any case small in the case of a contact hotplate. However, this primarily keeps the temperature of the cover plate 24 low, so that it can be installed even in the flattest cooking hobs near wooden parts in kitchen furniture.
  • highly heat-resistant insulating materials for example inorganic fibers such as asbestos or other known islier materials.
  • FIG. 10 shows three hotplates stacked one on top of the other, which apart from the fact that the sheet metal part 37 '(see also FIG. 11) is provided with a flat tongue 53 for connecting a corresponding flat connector 54 for the grounding line 40, with the hotplate according to FIG .1 are identical.
  • like reference numerals designate like parts.
  • the cut in FIG. 10 is offset by 45 ° in relation to FIG. 1, so that it can be seen that an insulating piece 55, which is supported on the inside of the cover plate 24 and extends through the cover plate 24, contains a temperature limiter in its section lying in the interior 48 and is continuous Openings 57 (FIG.
  • connection lines 58 protrude through the connection lines 58, which are provided with highly heat-resistant insulation, from the interior 48, where they are welded with connection pins protruding from the investment material 20 Area of a bulge 60 through the cover plate.
  • the connecting lines 58 are connected to a common connecting piece 75 made of ceramic insulating material (FIGS. 10 and 15), which contains plug-in or screw-type connection terminals 76 for connecting current supply lines 78.
  • the outer edge 77 of the connector 75 is preferably at a maximum distance of less than a hotplate radius from the outer edge and leaves adapt flexibly to the installation conditions, whereby the adjacent connecting lines act like a flexible band, which allows easy swiveling and greater mobility of the connecting piece in the vertical direction, but limits rotation and lateral movement to a greater extent.
  • the insulating piece 55 diametrically opposite and at a corresponding radial distance from the hotplate center there is a recess 61 in the cover plate 24, the dimensions of which are chosen such that they also include the projecting part of the insulating piece in the mutual assignment of the hotplate shown in FIG Can take safety without the leads 58 are kinked too sharply.
  • the width of the depression is substantially larger than that of the insulating piece, so that, as can be seen from FIG. 10 for the two upper hot plates, the connecting lines 58 can be folded inwards and the connecting piece 77 can lie next to the insulating piece in the depression 61 . It is also possible to store the connecting piece 77 (FIG.
  • the hotplates with their central axes are stacked one above the other with their flat cooking surfaces 13 and with their undersides covered by the cover plates 24, only a sheet or film 62 being inserted between the cooking surfaces 13 to prevent scratches, while between the hotplates -Under a packing plate 63 is placed, which can consist of plywood or chipboard and has recesses which are selected so that the hotplate is centered on it when placed on it. Parts of the hotplate projecting downward from the outer edge 23 of the cover plate protrude into the recess 64 of the packing plate 63.
  • the hot plates 11 are offset from one another in the circumferential direction by 180 °, so that the insulating piece 55 with the connecting leads protrudes into the recess 61 and the hot plate even requires a smaller packing space than its total height.
  • the edges 21 are supported with the interposition of the packing plate 63, in that a solid stack is formed which does not tend to tip over.
  • the aligned arrangement of the hot plates also contributes to this.
  • the packing plates 63 have numerous recesses 64 side by side and one behind the other according to the desired packaging or pallet size, so that a large number of hot plates can be stored and transported in a solid block, not only saving on storage and transport costs, but also safety against accidents elevated. Packing can also be done fully automatically by grippers.
  • the silica gel filling is missing in the hot plates according to Fig. 10.
  • An aluminum wrinkle film 51 is placed parallel to the cover plate 24 for insulation purposes only.
  • FIGS. 12 to 15 Another device is shown in FIGS. 12 to 15 in order to ensure that the hotplate is secured against rotation with respect to fastening parts, for example the bracket 42.
  • a sheet metal part 65 is used, which has the shape of a flat right-angled strip which extends in the area of the bend 66. Lateral incisions 67 separate edge areas at the ends of the sections 68, which are bent or rolled up around the ends (see in particular Fig. 13), so that the ends are pin-like.
  • U-shaped cutouts 70 are provided in sections 68, so that sheet metal tabs 71 arise, which are bent out of the plane of sections 68.
  • This sheet metal part 65 can be seen in the installed state from FIG. 14. Like the sheet metal part 37 in FIG.
  • the ends 69 are preferably only when the hotplate is installed in a stove or the like. bent by about 90 °, which is easily possible due to the incisions 67. It is only necessary to bend the end 69 which is to be inserted into a hole 73 in the mounting bracket 42 '. An anti-rotation device is also created here without the transport space being enlarged.
  • the anti-rotation sheet metal part 65 could be provided with a third section 37 ", at the end of which a flat tongue 53 is arranged for connecting an earthing line.
  • a single part can have a double function, namely anti-rotation and 15, however, it is also possible, as shown in FIG. 15, for the sheet metal part 37 'to be screwed on in addition to the anti-rotation sheet metal part 65 by means of the screw 32. Since the part 65 is already secured against rotation, a corrugation 41 on it is sufficient without it that it would be necessary on the cover plate.
  • the recess 61 As the hot plates are preferably packaged in 180 0 offset position, is the recess 61 the insulating part 55 diametrically opposite. It would of course also be possible to provide an offset at a different angle. Accordingly, the recess 61 would also have to be offset from the insulating piece 55 by a different angle.
  • the end plate has the advantage that it has sufficient rigidity due to the not very deep deformation is easy to manufacture and creates a well-insulated closed interior.
  • the cover could rest on the outer edge 21 as well as on the inner edge surrounding the sensor recess with one step following the cover plate. The fastening could also be done there using banjo bolts. In this case, the pin with the internal thread would not lie centrally but, for example, in the area of the outer edge.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Baking, Grill, Roasting (AREA)
  • Electric Stoves And Ranges (AREA)
  • Resistance Heating (AREA)
  • Cookers (AREA)
  • Table Devices Or Equipment (AREA)
EP82108179A 1979-08-17 1980-08-12 Plaque de cuisson électrique Expired EP0070042B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE8080104743T DE3064273D1 (en) 1979-08-17 1980-08-12 Electric cooking plate

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19792933296 DE2933296A1 (de) 1979-08-17 1979-08-17 Elektrokochplatte
DE2933296 1979-08-17

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP80104743.2 Division 1980-08-12

Publications (3)

Publication Number Publication Date
EP0070042A2 true EP0070042A2 (fr) 1983-01-19
EP0070042A3 EP0070042A3 (en) 1983-06-01
EP0070042B1 EP0070042B1 (fr) 1987-08-19

Family

ID=6078643

Family Applications (3)

Application Number Title Priority Date Filing Date
EP80104743A Expired EP0024621B1 (fr) 1979-08-17 1980-08-12 Plaque de cuisson électrique
EP82108179A Expired EP0070042B1 (fr) 1979-08-17 1980-08-12 Plaque de cuisson électrique
EP82108180A Expired EP0070043B1 (fr) 1979-08-17 1980-08-12 Plaque de cuisson électrique

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP80104743A Expired EP0024621B1 (fr) 1979-08-17 1980-08-12 Plaque de cuisson électrique

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP82108180A Expired EP0070043B1 (fr) 1979-08-17 1980-08-12 Plaque de cuisson électrique

Country Status (17)

Country Link
US (3) US4348581A (fr)
EP (3) EP0024621B1 (fr)
JP (1) JPS5631717A (fr)
AU (1) AU537864B2 (fr)
CA (1) CA1163298A (fr)
DE (4) DE2933296A1 (fr)
DK (2) DK352880A (fr)
ES (1) ES494268A0 (fr)
FI (1) FI67464C (fr)
GR (1) GR68424B (fr)
HK (1) HK59184A (fr)
NO (1) NO153669C (fr)
PL (1) PL122796B1 (fr)
PT (1) PT71703B (fr)
TR (1) TR21050A (fr)
YU (1) YU42531B (fr)
ZA (1) ZA805011B (fr)

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Also Published As

Publication number Publication date
DK69487A (da) 1987-02-11
PT71703B (pt) 1981-06-25
DE3064273D1 (en) 1983-08-25
DE3071840D1 (en) 1987-01-08
ES8103906A1 (es) 1981-03-16
JPH0246206B2 (fr) 1990-10-15
US4414466A (en) 1983-11-08
FI802550A7 (fi) 1981-02-18
AU537864B2 (en) 1984-07-19
DK69487D0 (da) 1987-02-11
PL226286A1 (fr) 1981-02-27
EP0024621B1 (fr) 1983-07-20
EP0024621A1 (fr) 1981-03-11
NO802436L (no) 1981-02-18
EP0070043A3 (en) 1983-06-01
YU42531B (en) 1988-10-31
FI67464B (fi) 1984-11-30
US4467181A (en) 1984-08-21
GR68424B (fr) 1981-12-29
EP0070043B1 (fr) 1986-11-20
HK59184A (en) 1984-08-10
DE2933296A1 (de) 1981-02-26
EP0070042A3 (en) 1983-06-01
EP0070043A2 (fr) 1983-01-19
DE3072014D1 (en) 1987-09-24
NO153669B (no) 1986-01-20
DK352880A (da) 1981-02-18
TR21050A (tr) 1983-06-07
YU205080A (en) 1982-08-31
US4348581A (en) 1982-09-07
AU6145980A (en) 1981-02-19
FI67464C (fi) 1985-03-11
NO153669C (no) 1986-04-30
ES494268A0 (es) 1981-03-16
JPS5631717A (en) 1981-03-31
EP0070042B1 (fr) 1987-08-19
PT71703A (pt) 1980-09-01
PL122796B1 (en) 1982-08-31
CA1163298A (fr) 1984-03-06
ZA805011B (en) 1981-08-26

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