EP0743804A2 - Elément chauffant - Google Patents

Elément chauffant Download PDF

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Publication number
EP0743804A2
EP0743804A2 EP96107634A EP96107634A EP0743804A2 EP 0743804 A2 EP0743804 A2 EP 0743804A2 EP 96107634 A EP96107634 A EP 96107634A EP 96107634 A EP96107634 A EP 96107634A EP 0743804 A2 EP0743804 A2 EP 0743804A2
Authority
EP
European Patent Office
Prior art keywords
conductor
section
heating
connection
base body
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
EP96107634A
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German (de)
English (en)
Other versions
EP0743804A3 (fr
EP0743804B1 (fr
Inventor
Eugen Wilde
Hans Mohr
Martin Gross
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 Geratebau 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 Geratebau GmbH filed Critical EGO Elektro Geratebau GmbH
Publication of EP0743804A2 publication Critical patent/EP0743804A2/fr
Publication of EP0743804A3 publication Critical patent/EP0743804A3/xx
Application granted granted Critical
Publication of EP0743804B1 publication Critical patent/EP0743804B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H05B3/74—Non-metallic plates, e.g. vitroceramic, ceramic or glassceramic hobs, also including power or control circuits
    • H05B3/748—Resistive heating elements, i.e. heating elements exposed to the air, e.g. coil wire heater

Definitions

  • the invention relates to a heater according to the preamble of claim 1.
  • the heater can advantageously have a single or more heating fields or be a radiation heater within an outermost free circumference of a supporting base body made of insulating material and / or metal. These heating fields can lie side by side and / or one inside the other transversely to a central axis of the base body, so that an outer heating field surrounds an inner partially or closed ring.
  • the respective heating field is assigned heating means, such as a heating resistor or heating conductor, which radiate heat during operation to the front or top of the heater, usually through a radiation-permeable or translucent cover, against the back of which the base body has one or more front end faces is applied under compressive stress.
  • the respective heating conductor can be arranged as a strand and in a contact-free manner or at a distance from the cover on a front side of the base body so that it determines a predetermined, visible glow pattern during operation. With its ends and / or at a distance between them, one is continuous or in one piece over the associated length Area of the resistor each connected to a connection conductor, via which the resistor is electrically connected from the outside of the base body or a connection body attached to it. Like the resistor, this conductor is not provided with a preassembled sheath or is exposed in a bare metallic manner on the same front side as the resistor.
  • the connecting wire can lie adjacent to the resistor over its entire length within one or more heating fields and can be visible like the resistor over at least part of this length.
  • means are expediently provided which prevent a change in the glow pattern during operation of the connecting wire insofar as this does not contribute to the configuration of the glow pattern or only with difficulty recognizable.
  • the heating fields are to be operated separately, e.g. in such a way that a central heating field can be operated either on its own or in combination with an externally adjacent heating field in order to have differently sized total heating fields for different sized cooking vessels for one and the same hob.
  • the connecting wire can be exposed to heating from the adjacent resistance during operation and therefore to changing longitudinal expansions, which lead to deformations. If the conductor is a straight wire, which is curved between its ends only in accordance with the path of the connection, this wire bulges out in the event of longitudinal expansion. The conductor deforms all the more the more he brings a heating power directly through an increased own resistance value during operation.
  • the invention is also based on the object of providing a heater in which disadvantages of known designs or of the type described are avoided and which, particularly in the case of a simple and optically non-disruptive arrangement of the respective connection conductor, does not interfere with high functional reliability or quality-assured processing in the manufacturing process. In particular, a high level of operational reliability and a long service life are to be achieved.
  • connection conductor transverse to its main longitudinal direction
  • mechanical load on the connection points of this conductor is reduced or avoided in such a way that the connection points are stable in position despite different thermal loads remain
  • a thermal overload of the conductor is reduced or avoided in a closely enclosed or encased longitudinal region and / or by which a glow of the conductor visible from the front of the heater is reduced or avoided to an only slightly visible brightness.
  • Means can also be provided to reduce the number of connection points or connection conductors, for example, so that less than six connection points or connection conductors are required for three heating fields and less than five connection points or connection conductors are required for two heating fields or heating circuits. Essentially all of these means can serve to compensate for or avoid thermal expansion of the connecting conductor or its effects.
  • the conductor consists of a strand material which is provided with a continuous profile in its longitudinal direction in such a way that it takes up a wider bandwidth than its associated cross-sectional extent, within which the strand runs back and forth transversely to the main longitudinal direction and which is constant over the length can be.
  • the profiling can be helical in two planes or wavy only in one plane parallel to the front or the like.
  • the connecting conductor based on a unit length of the strand material and / or the conductor, advantageously has a lower electrical resistance, a lower temperature and / or a lower glow brightness than any heating resistor during operation. This can be achieved by means of a larger material cross section in one or two of the above-mentioned planes perpendicular to one another, a material with a lower specific resistance and / or a profiling which is more elongated than the heating resistor or a larger division of the profiling.
  • the length of a solid wave of the connecting conductor is greater than that of a heating resistor, so that surfaces of the connecting conductor which face one another transversely to the main longitudinal direction are less prone to mutual heating when the conductor is self-heating during operation.
  • the profiling results in numerous conductor sections adjoining one another in the longitudinal direction, which are resiliently movable relative to one another and each compensate for an associated part of the thermal expansion at a distance between the connection points.
  • the connecting conductor can be anchored several times directly between the connection points with respect to the base body or be fixed in its longitudinal direction.
  • a conductor section lying between two anchoring points and consisting of several, in particular at most five or ten, profile units does not transmit its expansions, or only insignificantly, to the sections adjoining its two anchoring ends or to the connection points lying at a distance from these ends.
  • the strand material can have constant or changing cross-sections over the length of the conductor lying between the connection points, for example at the anchoring points cross-sectional enlargements or projections which engage for anchoring in the base bodies.
  • connection conductor can be designed, arranged and fastened like the heating conductor described there; the same applies to the heating conductor. If both or all conductors, fastening strands for components or fastening projections consist of flat or strip material, such as sheet metal, the result is a very simple design.
  • the range of the strand material of the conductors can be the same, so that they can be punched and profiled with the same tools and they can consist of the same material. To reduce the specific resistance, it is also possible to use the strand material of the heating resistor in the connection conductor in two layers.
  • the profile division of the connecting conductor compared to the heating conductor can also be increased, for example, doubled, by using the same corrugated band for the heating conductor with a narrower profile division and for the connecting conductor with an elongated, larger profile division.
  • the two conductors can be formed in one piece with one another, so that a separate one is used to connect them Connection point is not required, but this connection point results from the transition between two different profile divisions.
  • the connecting conductor can be mounted on the base body from the front, e.g. simply by inserting it into an electrically or thermally acting insulating body made of intrinsically stable compressed fibrous and / or granular insulating material.
  • At least one heating field or heating circuit can be delimited on its inner and / or outer periphery by a surface of the base body which is transverse to the front and which is closed over the circumference or provided with at least one opening.
  • This surface can be formed by one long side of a web-shaped projection, the other long side of which shields the adjacent heating field.
  • a connection conductor expediently crosses this shield, it being able to pass through the shield or can be covered by the shield on the front. Nevertheless, due to the training described in the area of enforcement, there is no fear of thermal overloading of the conductor.
  • the conductor can be closely embedded in the shield or the like and / or penetrate a groove-shaped recess in the shield without contact. Possibly.
  • the shield can also be fitted from the front onto the conductor or a corresponding profile strand by plugging or putting it on, the profile strand entering the recess or penetrating into the material of the shield and thereby a depression or groove corresponding to its shape Shield could pierce.
  • the shielding can be additionally secured in this way.
  • Two connection points are then expediently immediately adjacent to the inside of the shield, which can also be placed only on a front side of the base body.
  • the Formations according to the invention can be used to form the respective connection point, two to four flat material parts can be connected to one another at the same level or at the same level and welded by spot welding.
  • connection ends of one or two conductors can be placed on one or both sides of the flat sides of thicker flat parts and connected to them without play.
  • the two flat parts can be formed by a one-piece, V-shaped or U-shaped clip or its leg.
  • One of these legs in turn can be formed in one piece with one of the conductors or with a connecting part which passes through the base body from the outside to the inside.
  • the heater 1 forms with the components, means and arrangements shown a preassembled unit for arrangement on the back of a glass ceramic plate, the unit or the glass ceramic plate having several identical or different heaters, e.g. according to Figures 1, 6 and 7 can contain side by side.
  • the heater 1 has a base body 2 with two thermally and electrically insulating insulating bodies 3, 4 and a supporting body 5 made of sheet metal or the like which supports them.
  • the insulating body 3 forms a base plate and two annular boundaries, shields or edges 6, 7, concentrically spaced one inside the other, each of which can be formed in one piece with or separately from the base plate.
  • the respective insulating component expediently consists of a pourable starting material which is pressed in a form, for example a dry one and, if appropriate, pressed with a binder fumed silica airgel, from dry pressed vermiculite and / or from a fibrous, mainly ceramic fiber-like slurried material, which is pressed wet into shape and then dried.
  • the base plate preferably consists essentially only of the dry pressed granulate from the smallest beads and / or spatulate particles, which can be reinforced by admixing the fibers mentioned.
  • the edge advantageously consists essentially of the vacuum-formed or fibrous material.
  • the base plate can be completely flat on the front or form a projecting edge attachment over a partial height of the edge 6 or 7, on which the remaining, fibrous edge part is placed in a closed, particularly arranged arrangement of the conductors on the base plate.
  • This edge 8 connects in one piece to a base plate, which supports the insulating base on its outside.
  • a separate, plate-shaped insulating body 4 can be arranged between the bottom of the supporting body 5 and the insulating bottom, but the bottom plate of the insulating body 3 preferably extends in one piece to the supporting bottom, so that only a single insulating bottom is required.
  • Said components and arrangements 1 to 8 each form a shell body which is open to the front and flat and define a central axis 10 in the center thereof.
  • the inside or between the edges 6, 7 of the inner surface of the insulating body 3 forms an approximately plane continuous end face or bottom surface 9 which is perpendicular to the axis 10 and which is exposed to the front of the heater 1.
  • the corresponding end face of the edge 6 or 7 protrudes above the bottom surface 9 and is used for the pressed-on and almost tight and resilient System on the translucent cover plate, against which the edge 8 and possibly also the edge 7 can be set back slightly.
  • the edge 7 delimits a first, central heating field 12 in its interior, and a second, annular heating field 13 is delimited between the two edges 6, 7. Both heating fields 12, 13 directly adjoin the associated peripheral surfaces of the edges 6, 7.
  • the inner width of the field 13 is greater than its radial extent and the inner width of the annular field 12 is smaller than its radial extent, so that the bottom 6 forms a small, unheated center 14 about the axis 10.
  • a first strand-shaped resistor 15 is arranged approximately evenly distributed and in field 13 a corresponding second resistor 16.
  • resistor 15 or 16 can be concentrically ring-shaped, spiral-shaped and / or reciprocally parallel or reciprocating about axis 10 form rectilinear sections in which the resistance strand material is again continuously profiled in the longitudinal direction, namely is sinusoidal, trapezoidal or similarly wave-shaped or uniformly curved.
  • the corrugation has semi-elliptical flat arches and legs that are directly tangential and continuously flat.
  • Both ends 17, 18 of the conductor 15 lie on the outer circumference of the field 12 immediately adjacent to the inner circumferential surface of the edge 7.
  • One end 17 is formed directly by an outermost ring section of the conductor 15 and one end 18 by a rectilinear section which is radial from the innermost ring section going out.
  • the main longitudinal direction in which the strand material deviates from the straightness due to the profiling is also straight-line here.
  • the two opposite ends 19, 20 of the conductor 16 are formed by its outermost ring sections and correspondingly lie immediately adjacent to the inner peripheral surface of the edge 6.
  • connection conductors 21, 22 are provided, which are guided from the ends 17, 18 via straight sections through the field 13 and then directed away from one another or against one of the ends 20, 19 directed according to the outermost sections of the conductor 16 run along the inside of the edge 6 up to connection points.
  • two connecting bodies 23, 24 are fastened on the body 5 directly adjacent to one another at a distance from one another, each of which has a base made of insulating material, for example hard ceramic.
  • Two immediately adjacent connecting lugs 25, 26 extend from the base of the smaller body 23 and a connecting lug 27 extends from the base of the body 24.
  • the conductor tabs consisting of flat material strips lie radially to the axis 10 and penetrate the edges 6, 8 from the outside to the inside such that their inner ends at the bottom 9 or at the ends 19, 20 of the conductor 16 or at the associated outer ends 30, 32 of the conductors 21, 22 are exposed to form the connection points.
  • the inner ends 29, 31 of the conductors 21, 22 are connected via electrically conductive connectors 28 to the respective end 12 or 18 immediately adjacent to the inside of the edge 7.
  • the end 30 is only connected to the flag 25, the end 20 only to the flag 26. Both ends 19, 32 are connected to the flag 27. If only the flags 25, 27 are subjected to electrical voltage, only the arrangement 12, 15 is in operation, if only the flags 26, 27 are applied, only the arrangement 13, 16 is in operation and all the flags 25 to 27 are applied , both arrangements are in operation.
  • the radial distance between the outermost section of the conductor 15 and the innermost section of the conductor 16 or the width of the edge 7 is smaller than the width of the field 12 or 13 or 14, so that when operating both fields approximately one over its entire width uniformly heated total field 12, 13 is formed.
  • All conductors 15, 16, 21, 22 consist of the same, profiled starting material, which is why the description of the respective conductor applies equally to every other of these conductors.
  • the conductors 21, 22 consist only of a strand material of somewhat greater or double thickness than the conductors 15, 16, but these are in terms of the material, the profile, the fastening, the height, the position relative to the plane of the surface 9 and the type the connection to the flags 25 to 27 the same or similar. At least one of the conductors 15, 16, 21, 22 could also be partially or completely permanently shaped or bent over its length.
  • the conductor 16, 21 or 15, 22 has anchors 34 protruding at right angles to the bottom 9, which connect in one piece to its longitudinal edge 35 lying at the bottom 9 and only in view of the front side 11 corresponding to this Edge 35 are curved.
  • the armatures 34 are evenly distributed over the length of the conductor, preferably extend at most over one solid wave and have intermediate distances which are between one solid wave and at most four solid waves, in particular approximately one to two solid waves.
  • Each anchor 34 is thus curved like a spade in a view of the front side 11 corresponding to the associated longitudinal sections of the parallel longitudinal edges 35, 36, projects beyond the longitudinal edge 35 by at least the distance between the edges 35, 36 or further and forms in each case at least one convex and immediately on the other side in each case a concave flank which continuously passes over its height or that of the conductor 16, 21.
  • the armature 34 can be curved only in a simple, S-shaped or similar manner or lie on one and / or other side of the longitudinal center plane of the conductor profile.
  • the spacing of the anchors 34 differs from the profiling, so that adjacent anchors have different shapes and positions with respect to the longitudinal center plane 38 which they cross.
  • the front sectional plane of the bodies 3 to 5 lies in the central plane 38 of the conductor 16.
  • the conductor 15, 16, 21, 22 is transversely to its main longitudinal direction 37 or parallel to the central plane 38 in the front of the dry soil 9 pressed in, so that all the anchors 34 penetrate into the bottom 9 at the same time in the manner of acute-angled piercing tips, thereby first creating their receiving recesses in the bottom 9 and then being fully embedded on their flanks with their flanks and side edges.
  • the edge 35 can strike the floor 9 without penetrating, remain at a gap from it and / or partially penetrate into the floor like the anchors 34.
  • the central plane 38 lies parallel to the longitudinal direction 37 and at right angles to the bottom surface 9 or to the layer plane 39 of the conductor 16, 21, which is indicated here in the middle of the height of the conductor.
  • the edges 35, 36 lie continuously parallel to the plane 39 and have the same distance for all conductors from each other.
  • the longitudinal edges 35 of adjacent conductor sections and / or all of the conductors lie in a common layer plane, as do their edges 36.
  • the longitudinal direction 41 of the armature 34 is perpendicular to the plane 39 and parallel to the plane 38. The profiling results in a few hundredths compared to the material thickness Much larger profile bandwidth 42 of the conductor 16, 21, in the middle of which is the plane 38.
  • the armature 34 like the rest of the conductor, can continuously pass through at least one cross-section up to all cross-sections lying parallel to planes 39, 43 up to the side edges or to the tip.
  • the configuration according to the invention creates means 40 which prevent the conductors 21, 22 from visibly glowing during operation or from the visible appearance of the conductor 15.
  • the conductor 21, 22 could, however, also be connected in such a way that it glows visibly during operation of both conductors 15, 16, so that those areas of the field 13 which are not occupied by the conductor 16 are visibly filled by the conductor 21, 22 .
  • the conductor 21, 22 does not cross any of the other conductors in view of the front 11 and is nevertheless completely and, like the conductors 15, 16, visible on the front 11 of the base 9, because it is laid overall in the heating conductor plane. This results in a very space-saving design, in particular with regard to the axial extent of the heater 1.
  • each individual shaft, solid shaft or each continuous section forms a compensation section 33, which in the manner of a longitudinal spring reversibly absorbs any thermal longitudinal expansions by deformation, without the bandwidth 42 being appreciably changed thereby.
  • the anchors 34 can also deviate slightly in the case of longitudinal expansion without increasing their receiving recesses.
  • the conductor 16, 21 thus continuously forms a multiplicity of sections 33 over its length, the length of which, according to the profile or length division, is at most 10 or 6 mm and at least 2 mm at most 2 or 3 times greater than that Profile bandwidth is 42.
  • the height of the respective armature 34 is, for example, between 2 and 3.5 mm smaller than its greatest width of, for example, 3.5 to 6.5 mm.
  • the average distance between adjacent anchors 34 can be 3 to 6 times this greatest width of the anchor, which is developed at an acute angle or symmetrically trapezoidal in development.
  • Most of the anchors 34 are formed asymmetrically to the central plane 43 lying between their side edges and perpendicular to the direction 37 or to the planes 38, 39 and the edge zones forming the side edges are oblique to the plane 38, 39.
  • the length corresponds to a full profile or solid shaft two opposing arches and two legs, whereby a solid shaft with its opposite legs can reach level 38.
  • the angle between diverging shaft legs in the stretched state of the wave band is expediently at most 45, 40 or 35 ° and the leg opening is at least 1.5 to 2 times or at most 3 or 4 times wider than the wave bottom.
  • the same also applies to the shape of the armature 34.
  • the conductor 21, 22 can be heated by the electrical power applied to it and / or by the sections of the conductor 15 or 16 adjacent to it. In any case, the described light inhibition 40 is achieved.
  • the conductors 21, 22 form on both sides of an axial plane 44 of the field 12, 13, 14 or the axis 10 or of the edge 6, 7 symmetrical straight strip sections which penetrate the edge 7 in the area of a bushing 45.
  • the edge 7 has a groove-shaped recess on the back, which receives both conductors 21, 22, so that they are covered closed to the front.
  • the connectors 28 lie approximately on the curve of the outermost sections of the conductor 15. Its innermost section of curvature merges into a strip section which is directed straight outwards and forms the end 18, and the straight strip sections of the conductors 15, 22 adjoin one another in alignment.
  • the outer band sections of the conductors 21 or their arc sections lie on the curve of the outermost sections of the conductor 16 and form the ends 30, 32.
  • the rod-shaped straight or cylindrical temperature sensor 47 of a control device such as a temperature limiter 46 also lies in the axial plane 44, the base of which receives the associated switching contacts and is formed by that of the body 24.
  • the sensor has two rods with different coefficients of thermal expansion, namely an outer tube and an inner rod lying therein.
  • One rod, for example the outer tube, is rigidly attached to the base and the other actuates the contacts located in the base.
  • the flag 27 and both conductors 15, 16 are de-energized.
  • the limiter 46 can also contain a signal contact or the like, for example for a hot display of the hotplate.
  • the sensor 47 is parallel to the plane 39 of the edges 36 and opposite them with an axial distance that is at least as large as the distance of the edges 36 from the bottom surface 9, at most 3 times as large as this distance and in particular approximately twice as large.
  • the height distance of the edges 36 is approximately between 1 and 2 times the width 42 and, like the width 42, can be between at least 2 and at most 5, in particular between 3 and 4 mm.
  • the sensor 47 which has constant external cross-sections throughout its length, penetrates radially through a closely adapted opening or bore in the edge of the body 3 and / or in the edge 6 and a corresponding opening in the edge 7, the latter being the same opening as for the conductors 21, 22 can.
  • the free end of the sensor 47 extends at least or only into the zone 14 and only slightly beyond the axial plane 49 of the axis 10 which is at right angles to it.
  • the sensor 47 can be supported radially or transversely to the plane 39 against a base or the like on a projection or the like under compressive stress, or can be rigidly mounted with fastening means.
  • the sensor 47 lies freely opposite to one another over the entire associated length of the surface 9 and is set back from the end face of the edge 6 or 7.
  • strip-shaped zone 50 is formed, which in operation has a significantly lower power density than the zone in the region of the curved sections of the conductors 15, 16 and in which only the straight band sections of the conductors 15, 21, 22 and the exposed longitudinal sections of the sensor 47 are located .
  • Zone 50 passes through both fields 12, 13 to zone 14 and is only interrupted by edge 7 insofar as it is formed by surface 9.
  • the sensor 47 When the conductor 15 or 16 is in operation, the sensor 47 is subjected to less thermal stress than if it were to cross the more power-intensive zones, so that it does not respond too quickly when heating up, but with a delay. In the field 12, the sensor 47 is subjected to a somewhat greater thermal load than in the field 13 by the straight section of the conductor 15, so that overheating of this field 12 is avoided when the field 12 is operated alone and only the associated part of the sensor length is subjected to heat.
  • the innermost arc section of the conductor 16 passes in one piece on the side of the level 49 facing away from the bushing 45 through the level 44, and all other arc sections are connected to one another via bends 48. All arc sections of the conductor 15 also go through in one piece on this side of the level 49.
  • the bends 48 of the curved sections of the conductor 16 can be closer to one another on the side of the plane 49 facing away from the zone 50 than on the other side.
  • the ends 17, 29 of both conductors 15, 21 are pressed flat or flat at most over one or two wavelengths, specifically one end 29 in the region of an armature 34, which can connect to the associated end edge.
  • This projection 34 is folded by 180 ° or around the edge 35 against the end 29, so that two plate-shaped jaws 51, 52 are formed, which are initially V-shaped at an acute angle to each other. Between these beaks 51, 52 the other end 17 can be inserted transversely to the plane 39 and / or parallel to the direction 37 so that the two ends 17, 29 lie flat against one another.
  • the jaws 51, 52 are pressed with a pair of pliers, such as welding tongs, against each other and against the end 17 and all three layers are rigidly connected to one another by a fastening member 53, for example a welding point.
  • a fastening member 53 for example a welding point.
  • the jaw 52 protrudes from the surface 9, but could also be directed towards this.
  • at least one of the layers could directly form an anchor engaging in the base 9, which can be flat or curved in accordance with the anchors 34.
  • at least one conductor 15, 21 has an armature 34, so that mechanical stresses on the connection point are connected by thermal expansions.
  • the flat material strip 27 passes through, as explained with the aid of the sensor 47, the bodies 2, 3, 5 and, immediately adjacent to the inside of the edge 6, forms the jaw 51a, which is angled against the bottom 9 and on which to form the receptacle for the respective end 19, 32 Jaw 52a connects.
  • the respective end 19, 32 can protrude beyond the respective jaw in the direction 37 or transversely to the plane 39, or the respective jaw can protrude in these directions.
  • This connection point lies between two near anchors 34.
  • the outer end of the strip 27 is at a laterally projecting connection, such as a tab of the body 24 Welding or the like connected.
  • the strips 25, 26 engage in the base 23 and, like connections of the body 24, are to be connected to external feed lines which originate from a manually operated control device, such as a rotary switch.
  • the respective strip can be pushed through from the inside of the edge 6 and then connected to the associated socket or the associated connection by welding, plugging, clawing or the like.
  • the ends 18, 31 of the conductors 15, 22 abut one another with their end edges at the same level, between which there may also be a small gap.
  • the jaws 51b, 52b are formed by a separate, U-shaped component, which instead of the edge 35 is attached from the edge 36 or covers this edge 36 with its transverse web. Both ends 18, 31 are fastened to the electrically conductive jaws 50b, 52b with separate fastening members 53.
  • Each of the connection connections according to FIG. 1 can be formed by any of the connections according to FIGS. 3 to 5.
  • FIGS. 6 and 7 as in FIGS. 3 to 5, the same reference numerals are used for corresponding parts as in the other figures, but with different letter indices, which is why all parts of the description apply mutatis mutandis to all figures.
  • the conductors 15c, 21c, 22c or their adjoining ends are formed here in one piece from the same strand material, so that there is no need for separate connectors 28.
  • a unit length of the waveband contains at least 1.5 and at most 3 or 4 times the length of strand material, in particular at least 2 times the length.
  • the length unit of the conductor 21c, 22c expediently contains at least one third and at most two thirds, in particular half, of strand material.
  • edge 7 is, like the edge 6d, elongated rectangular in plan view and on both sides of the field 12d there are two separate fields 13d which, when in operation with the field 12d, form an elongated, rectangular overall cooktop.
  • the conductors 16d of the fields 13d can likewise be operated separately from one another or only together.
  • the conductor sections closest to edge 7d open the above-mentioned side in one piece via an elongated connecting conductor according to FIG. 6 or via a separate connecting conductor with a connector according to FIGS. 1 to 5. This conductor is guided through a passage 45 of the edge 7d and is therefore covered.
  • the edge 7d connects in one piece to the long sides of the edge 6d.
  • the conductor 21d passes through a bushing 45d of the edge 7d parallel to these longitudinal sides, directly adjacent to the inside of the edge 6d, since the outermost conductor sections of the conductors 15d, 16d are aligned with one another adjacent to this longitudinal side.
  • the conductor 22d passes through a bushing 45d lying obliquely to this longitudinal side and the body 24d, the controller 46d, the sensor 47d and the zone 50d also lie correspondingly obliquely.
  • the conductors 15d, 16d, 21d, 22d can, like those according to FIG. 1, be designed and connected in any of the described ways.
  • the flags 25d, 26d lie in one field 13d and the flag 27d in the other field 13d, so that in field 12d no connecting flag protruding from the outside and also no associated body 23d is required.
  • the conductor 15d is connected exclusively via bushings or channels 45d which lie within the outer circumference of the body 3d or the edge 8d and directly connect the field 12d to the fields 13d.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Resistance Heating (AREA)
  • Incineration Of Waste (AREA)
  • Tunnel Furnaces (AREA)
EP96107634A 1995-05-17 1996-05-14 Elément chauffant Expired - Lifetime EP0743804B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19518109 1995-05-17
DE19518109A DE19518109A1 (de) 1995-05-17 1995-05-17 Strahlungs-Heizer

Publications (3)

Publication Number Publication Date
EP0743804A2 true EP0743804A2 (fr) 1996-11-20
EP0743804A3 EP0743804A3 (fr) 1996-12-11
EP0743804B1 EP0743804B1 (fr) 2003-03-19

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP96107634A Expired - Lifetime EP0743804B1 (fr) 1995-05-17 1996-05-14 Elément chauffant

Country Status (4)

Country Link
US (1) US5892205A (fr)
EP (1) EP0743804B1 (fr)
AT (1) ATE235136T1 (fr)
DE (2) DE19518109A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3289932A1 (fr) * 2016-06-28 2018-03-07 Maurer, Sabrina Élément de chauffage à résistance pouvant être inséré
US11516891B2 (en) * 2018-10-24 2022-11-29 E.G.O. Elektro-Geraetebau Gmbh Heating device and electric cooker

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GB0221519D0 (en) * 2002-09-17 2002-10-23 Ceramaspeed Ltd Radiant electric heater
GB0316627D0 (en) * 2003-07-16 2003-08-20 Ceramaspeed Ltd Radiant electric heater
DE102004023847B4 (de) * 2004-05-13 2013-12-05 BSH Bosch und Siemens Hausgeräte GmbH Kochfläche mit einer Glaskeramikplatte
DE102005036581A1 (de) * 2005-08-01 2007-02-08 Electrovac Ag Heizband für einen elektrischen Heizer, Heizer mit einem derartigen Heizband sowie Verfahren zum Herstellen des Heizbandes
GB0811980D0 (en) * 2008-07-07 2008-07-30 Ceramaspeed Ltd Radiant electric heater
JP6219229B2 (ja) * 2014-05-19 2017-10-25 東京エレクトロン株式会社 ヒータ給電機構
DE102017222958A1 (de) * 2017-09-04 2019-03-07 E.G.O. Elektro-Gerätebau GmbH Heizeinrichtung und Verfahren zur Herstellung einer Heizeinrichtung

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
EP3289932A1 (fr) * 2016-06-28 2018-03-07 Maurer, Sabrina Élément de chauffage à résistance pouvant être inséré
US11516891B2 (en) * 2018-10-24 2022-11-29 E.G.O. Elektro-Geraetebau Gmbh Heating device and electric cooker

Also Published As

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US5892205A (en) 1999-04-06
EP0743804A3 (fr) 1996-12-11
DE59610228D1 (de) 2003-04-24
ATE235136T1 (de) 2003-04-15
DE19518109A1 (de) 1996-11-21
EP0743804B1 (fr) 2003-03-19

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