EP0542142B1 - Strahlungs-Heizeinheit - Google Patents

Strahlungs-Heizeinheit Download PDF

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Publication number
EP0542142B1
EP0542142B1 EP92119004A EP92119004A EP0542142B1 EP 0542142 B1 EP0542142 B1 EP 0542142B1 EP 92119004 A EP92119004 A EP 92119004A EP 92119004 A EP92119004 A EP 92119004A EP 0542142 B1 EP0542142 B1 EP 0542142B1
Authority
EP
European Patent Office
Prior art keywords
temperature sensor
temperature
heating unit
radiant heating
unit according
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
EP92119004A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0542142A2 (de
EP0542142A3 (en
Inventor
Siegfried Mannuss
Eugen Wilde
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
Publication of EP0542142A2 publication Critical patent/EP0542142A2/de
Publication of EP0542142A3 publication Critical patent/EP0542142A3/de
Application granted granted Critical
Publication of EP0542142B1 publication Critical patent/EP0542142B1/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
    • F24C15/105—Constructive details concerning the regulation of the temperature
    • 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
    • H05B3/746—Protection, e.g. overheat cutoff, hot plate indicator
    • 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
    • H05B2213/00—Aspects relating both to resistive heating and to induction heating, covered by H05B3/00 and H05B6/00
    • H05B2213/04—Heating plates with overheat protection means

Definitions

  • the invention relates to a radiant heating unit, e.g. can be used as a hob, oven or other heating in order to emit thermal radiation through a radiation-permeable shield or plate.
  • the temperature sensor is expediently arranged at least partially in this room, specifically between the radiation side of at least one radiator and the contact plane for the shield. Because of the low conductivity of the plate or the heating unit, it has previously been assumed that the temperature sensor must extend over the entire space assigned to this heating in order to ensure effective protection even in the case of locally limited overheating.
  • the temperature sensor therefore generally forms a rod which crosses the room and engages with its ends in the boundary walls of the room. As a result, a different temperature sensor is required for each size of a heating unit or such a space, which is disadvantageous for production, storage and assembly. Spacers are also provided between the temperature sensor, support body and plate.
  • a radiation heating unit has become known in which the temperature sensor does not extend across the entire heating field. Its end is provided with a bracket which is supported on the insulation of the support body and / or on the plate to be heated. The holder is interposed between the sleeve forming the temperature sensor and its inner rod and fastened in the insulation.
  • protection can be provided by a temperature sensor which is only on one side of an axial plane of the hob lying transversely to it and on the side of the heating remote from the heating or cooking surface, since local overheating occurs here due to the good thermal conductivity of the hotplate body are not to be feared (DE-U-76 12 737).
  • This temperature sensor is not heated as high as the hotplate body itself, but works at a much lower temperature derived from this temperature, which is why it responds much more slowly than a temperature sensor in a radiant heating unit.
  • the radiant heating unit can have an overall heating field, which is subdivided into separately operable individual fields, so that the size or type of operation of the heating field can be changed by the choice of the number of simultaneously operating and connecting individual fields can.
  • the smallest type of operation or size of operation, the associated heating field of which is put into operation in every working state, must then have the above-mentioned monitoring by the temperature sensor, which is why this forms a thermally reactive working section in the area of this individual field with a longitudinal section.
  • the invention has for its object to provide a radiation heating unit of the type mentioned, by which disadvantages of known designs or the type described are avoided and which, with safe overheating protection, simplifies the design, manufacture and assembly of the temperature limiter, in particular its exact positioning, and ensuring the positioning of the insulation.
  • This stiffening structure counteracts any arching of the base of the support body and the heating arranged thereon due to thermal loading, so that the distance between the heating and the temperature sensor, between the heating and the system level, ie the heated plate, and between the temperature sensor and the system level always remains approximately constant.
  • a leaf spring-like support of the temperature limiter, but also a resilient tie rod or the self-suspension of the temperature sensor or the edge of the supporting body can serve as the clamping means.
  • Brackets are advantageously only provided at a greater distance from the circumference of the heating field.
  • the distance of the brackets from the free end of the temperature sensor can be of the order of one-seventh to a quarter of the length of said longitudinal section, the bracket can also extend to the end face of the temperature sensor or beyond and the upper limit of the distance from this end face is approximately a third to half of the length mentioned.
  • means are provided to arrange one or both ends of the thermally reactive working section of the temperature sensor at a distance within the heating field, which also includes an individual field according to the smallest operating mode, so that this working section does not essentially cover the entire associated heating field, but only a small part of the diameter of it directly captured by direct irradiation.
  • this working section does not essentially cover the entire associated heating field, but only a small part of the diameter of it directly captured by direct irradiation.
  • the respective end of the working section is critical with regard to the working accuracy of the temperature sensor in that it contributes to its adjustment, which is why it was previously assumed that this end should not be exposed to as high thermal loads as the other parts of the working section in order to avoid misalignment .
  • This end like the subsequent main section of the working section, is advantageously subjected to the same thermal load and a misalignment due to thermal changes in shape is prevented in that the components fixed to one another to maintain the adjustment are connected to one another in such a way that their connection is essentially neutral with regard to the thermal adjustment .
  • the end face of the temperature sensor can thus be directly exposed to the radiation from the heating.
  • an adjusting member for the temperature sensor in the area of this end face, which, as an expansion rod sensor, expediently consists of two rod parts of different thermal expansion coefficients, at least over the working section, for example an outer tube and an inner rod arranged therein.
  • the adjusting member is then, for example, a pressure body held free of play in the longitudinal direction of the free end of the outer tube, on which the inner rod is axially supported and which is expediently thread-free in order to achieve thermally neutral behavior or is held so that its mounting connection is not caused by expansion deformations can be relaxed. Training of the adjustment according to DE-A-40 29 351.3 is particularly advantageous here
  • the temperature sensor overlaps at least one heating element or one turn of each heating circuit.
  • a thermally essentially non-reactive longitudinal section e.g. an extension rod, which supports the temperature sensor, in particular at its end remote from a switch head, against the inner periphery of the support body forming the working periphery.
  • the outer tube of the temperature sensor can be subjected to tension or pressure in the working state, it can be made of steel and / or quartz glass or the like, and it expediently has substantially constant cross sections over its entire length.
  • At least one holding body can at least partially, for example in the area of the connection to the temperature sensor and / or the supporting body, consist of a thermally minimally conductive material, such as an insulating material, and / or an electrically or thermally highly conductive, possibly metallic material, wherein as materials in particular relatively soft pressed Ceramic fiber materials, hard ceramics, steel or the like are suitable.
  • one and the same temperature protection switch in the form of a self-contained assembly can be used for radiation heating units which have heating fields of very different sizes, the temperature sensors of which then protrude more or less far into this heating field depending on the width of the heating field, but in sufficient to safely monitor the entire heating field against overheating.
  • the heating unit 1 has a flat-shell-shaped, essentially circular, long-round kidney-shaped and / or at least one-cornered support body 2, which can be symmetrical to a central axis, at least one axial plane or non-symmetrical.
  • the support body 2 is essentially formed by two insulating bodies 3, 4 and a support shell 5 of the shape mentioned.
  • An insulating body 3 exposed to the heating side is made as a flat-shell shaped body made of, for example, compressed, high-temperature-resistant insulating material compressed in the vacuum suction process, which contains ceramic fibers and possibly binders and is slightly resilient or settling under the pressure loads occurring during operation, and is therefore permanently deformed, whereby it despite this inherent stability, it can be squeezed between two fingers in the given cross-sections and pulverized with a medium force.
  • the insulating body 3 is supported with its insulating base 7 of less than 5 mm thickness on the approximately plate-shaped insulating body 4, which is made of a thermally even better insulating, but less solid insulating material, for example a bulk material made of microporous pyrogenic silica, by compression, but like that Insulating body 3 can be an intrinsically stable molded body.
  • the insulating bodies 3, 4 rest against one another only with a part of their mutually facing surfaces in that the insulating body 4 has, at a short distance from its outer periphery, a flat projecting annular projection which otherwise keeps the two insulating bodies at a gap from one another.
  • This spacing or ring projection is approximately congruent with an insulating edge 6.
  • the insulating edge 6 is formed in one piece with the insulating base 7 and, as an essentially closed ring edge, projects over its front side by considerably more than its or its own thickness, which is several times greater than the thickness of the insulating bottom 7.
  • the support shell 5 consists essentially of one piece of sheet metal and has a shell edge 8 lying approximately at right angles to the insulating base 7 and a shell base 9 profiled several times in a ring around its central axis, on which the insulating body 4 rests essentially over the entire surface so that its outer circumference extends up to The inner circumference of the edge 8 of the shell extends, on which the insulating edge 6 also lies approximately over its entire height.
  • the components mentioned are axially aligned with the central axis 10 of the support body 2 and form at right angles to this central axis 10 on the front an essentially closed contact surface 12, with which the heating unit 1 is resiliently clamped in a contact plane 11 against the back of a plate or the like.
  • the contact surface 12 is formed by the shell edge 8 protruding a few millimeters above the insulating edge 6, while according to FIG. 2 it is formed by the insulating edge 6 protruding so far beyond the shell edge 8 that due to the contact pressure occurring elastic deformation and the shrinkage due to aging of the shell edge 8 can only almost reach the contact plane 11, but the insulating edge 6 is not pushed wide.
  • the contact surface 12 thereby simultaneously forms a flat, resilient sealing surface formed in one piece with the entire insulating edge 6.
  • the spring force for contact pressure expediently acts on the support shell 5 or on the shell base 9.
  • the heating resistor 14 can be attached, for example, by partially embedding it in the insulating base 7.
  • two heating resistors 14 could form two separately switchable heating circuits 15, 16, each of which are distributed substantially uniformly over the entire surface of the insulating base 7, and / or at least two heating resistors could be connected in parallel.
  • All the radiators 13 or the front of the insulating base 7 define a heating field 17 which passes from its outer circumference or its working periphery 20 to the central axis 10 continuously over most of the associated radial extent or essentially continuously in terms of its power density and approximately in the illustrated embodiment
  • Eight to ten approximately concentric or equally wide ring zones 18 as well as a middle field or a middle area 19 adjoining the innermost ring zone and extending to the central axis 10 is divided, the width of which - depending on the size of the heating field - corresponds to approximately one third of the total width of the heating field .
  • the area-specific specific power density of the radiators 13 is smaller than in the adjoining or remaining ring zones 18.
  • the common axial plane of the two innermost loop arches 23 can lie approximately in the central axis 10.
  • the outer ends of the heating resistors 14 form connection ends 26 for the electrical connection of the radiators 13 and are for this purpose as close as possible or all approximately equally close to the inner circumference of the insulating edge 6 or at approximately the same distance from the central axis 10.
  • the windings 21, which are otherwise curved approximately about the central axis 10, advantageously form less curved to rectilinear, likewise parallel winding sections 27, so that here a field is adjacent to the inner circumference of the insulating edge 6 for receiving the connection ends 26 results.
  • this field is free of heating resistors on a relatively large area, but the outermost windings can also be extended to the left to such an extent that this field is also essentially completely covered or except in the region of the gaps with heating resistors and the connection ends 26
  • the inner circumference of the insulating edge 6 is directly adjacent.
  • the heating unit 1 is used for the approximately sealed contact of its contact surface 12 on the rear or underside of a translucent plate 28 made of glass ceramic or the like, against the back of which several identical or different heating units 1 located at a distance from one another can also be placed, for example around adjacent hotplates to build.
  • a temperature protection device 29 is provided exposed opposite this plate 28 or the contact plane 11, with which the plate 28 in particular is to be protected against overheating by the radiators 13 in that the latter When a limit temperature is reached, the device 29 automatically switches off at least some or all of the installed power of the radiators 13 and automatically switches it on again when the temperature falls below a lower limit.
  • a slim rod-shaped and straight-line temperature sensor 30 is provided in the space between the insulating body 3 and the plate 28, which is sealed against flow-through.
  • This has a metallic outer tube (sleeve) 31 forming its exposed outer circumference and an inner rod 32 made of ceramic or the like with radial play therein.
  • the outer tube 31 is secured at one end in its longitudinal direction to a housing-shaped base body (temperature limiter head) 33 made of hard-ceramic insulating material, in which the associated end of the inner rod 32 engages in such a way that it has a snap switch 34 for the power to be switched off and, if appropriate, one underlying snap contact actuated for a signaling device.
  • outer tube 31 and inner rod 32 are secured against one another by the associated switching force by means of a pressure system and / or a connection that is loaded with a fuse. If the sensor breaks or is removed, the switch 34 is actuated in the sense of switching off all or part of the power.
  • the base body 33 which projects the temperature sensor 30 freely over most of its length, lies with a gap on the outside of the support body 2 or the shell edge 8 and is fastened to it with a resilient, angular support 43, one leg of which is approximately parallel and is contact-free adjacent to the edge 8 of the shell, while the other leg, possibly by bracing with bolts or the like, is fixed in position on the underside of the shell bottom 9.
  • the shell bottom 9 has, in connection with its outer periphery, a shoulder which is offset from the contact plane 11, in particular in a ring-shaped manner, so that the carrier 43 does not protrude beyond the outside of the rest of the shell bottom 9.
  • the base body 33 can with the temperature sensor 30 slightly resilient pivoting movements around an axis lying in the region of the shell edge 8 and / or the shell base 9 and approximately parallel to the contact plane 11 and transversely to the longitudinal direction of the temperature sensor 30 and possibly also about an axis Execute the axis lying transversely to the contact plane 11, which significantly reduces the risk of breakage due to strong vibrations.
  • the free end 36 of the temperature sensor 30 can e.g. Adjustment 37 provided for the signal contact may be assigned, while an adjustment for switch 34 is assigned to the other, base-side end 35.
  • the adjustment 37 the adjustment of which is carried out before the temperature sensor 30 is installed in the heating unit 1, has an adjusting member 38 in the form of a bolt which is substantially smooth on the outer circumference and which is essentially free of radial play in the associated, e.g. tapered end portion 39 of the outer tube 31 is inserted, is supported with its inner end face at the associated end of the inner rod 22 in any operating state under pressure and is fixed by welding in the end portion 39.
  • the switch 34 is adjusted from the side of the base body 33 remote from the temperature sensor.
  • the temperature sensor 30 Over the area over which the temperature sensor 30 lying between this support and the other end of the inner rod 32 in the area of the heating field 17 is exposed to the direct radiation of the radiators 13, ie essentially From the mentioned support to the inner circumference of the insulating edge 6, the temperature sensor 30 forms a thermally reactive working section 40, in the area of which the outer tube 31 reacts to changes in the heating radiation with changes in length.
  • the temperature sensor 30 In the area of the insulating edge 6, the temperature sensor 30 is shielded from this heat radiation essentially by passing through the insulating edge 6 and / or the shell edge 8 either according to FIG. 1 in the area of further openings or according to FIG. 2 in the area of closely matched bores and therefore is centered by this edge.
  • the working section 40 could lie approximately tangential or tendon-like to one or more turns 21, but is expediently provided approximately in an axial plane 41 of these turns or the central axis 10, which is at an angle of approximately 45 ° to the common axial plane of the two innermost loop arches 23 lies. 1, the connection ends 26 or their associated outermost end turns do not reach this axial plane 41, these can also penetrate the axial plane 41, so that the working section 40 is also exposed to direct radiation heating in this region adjoining the inner circumference of the shell edge 6 is.
  • the working section 40 or the temperature sensor 30 extends at most up to the associated axial plane 42 of the windings or the central axis 10 lying transversely or at right angles to the axial plane 41, so that it covers most of the eight to ten ring zones 18, specifically in the region of the Turn sections 27, detected, which are approximately parallel to the axial plane 42.
  • the working section 40 can also pass through the axial plane 42.
  • the insulating base 7 and the temperature sensor 30 are still in the area of which it is free End 36 is supported directly against one another by a holder 44, which is formed essentially exclusively by a single holding body (projection) 45 made of the material mentioned and made in one piece with the insulating base 7.
  • the holding body 45 lies in the center gap 25 closer to the central axis 10 or penetrated by it at the edge and adjoins the inner circumference of the associated innermost loop bow 23 with only a small gap distance, which is why it has the curved tip described in view of the contact plane 11 has a tapered shape.
  • the compressive force is smaller than those deformation forces that would be required for an elastic bending deformation of the temperature sensor 30, but larger than curvature forces directed against the contact plane 11, which could occur due to thermal expansion curvature of the insulating base 7.
  • the shell edge 8 is not directly influenced by these forces if it also forms a resilient stiffening profile with the shell bottom 9 or the shoulder receiving the carrier 43 to secure the position of the base body 33.
  • the holding body 45 lies essentially completely on one side of the central axis 10 or the axial plane perpendicular to the common axial plane of the loop arches 23, but is penetrated by the axial planes 41, 42. Since it is tapered to its free end face in its outer width and also because of the arrangement described, the holding body 45 shields the temperature sensor 30 or the working section 40 practically not or only negligibly thermally from the direct radiation of the radiators 13.
  • the hump-shaped holding body 45 is also completely non-contact with respect to the entire inner circumference of the insulating edge 6, by which the working periphery 20 of the heating field 17 is determined.
  • the holder 44 lies in the area of the gap between the insulating body 4 and the insulating base 7, the thickness of which corresponds approximately to the outer width of the temperature sensor 30, as a result of which the cambering forces mentioned can be kept particularly low and also the insulating base 7 of the pressure force of the temperature sensor 30 in the region of the holder 44 can yield elastically.
  • FIGS. 3 to 8 the same reference numerals are used for corresponding parts as in FIGS. 1 and 2, but with different indices, which is why all of the description parts apply analogously to all embodiments.
  • the brackets according to Figures 1 to 8 can be provided individually or in any combination and number for the same temperature sensor.
  • the support surfaces 49 rest on the insulating base 7 under the pressure of the clamping means, ie the resilient support 43.
  • the in the Insulation penetrating armature 50 form a guide for the bracket and the temperature sensor.
  • a plate-shaped holding body 45a made of hard ceramic is provided with a thickness that corresponds approximately to the diameter of the temperature sensor 30a.
  • the holding body 45a forms an essentially closed eyelet 46 with a through opening 47, which can be only slightly wider than the outer circumference of the working section 40a, so that the outer tube 31a, which also does not participate in the switchable sensor expansions made of quartz glass or Like. Can be longitudinally displaceable relative to the bracket 44a.
  • the eyelet 46 projects beyond the side of the working section 40a facing away from the radiator 13a, but not up to the contact plane or contact surface 12a, so that it remains in contact with the plate 28.
  • the plate body 48 having the eyelet 46 forms two approximately aligned shoulder or support surfaces 49, between which a plug-in anchor 50, pointed at the free end, projects.
  • the holding body 45a which is rectangular in cross-section, the holding body 45a, after being plugged onto the temperature sensor 30a, can be inserted into the insulating base 7a or the insulating body 4a while simultaneously displacing material to form the associated plug-in opening and secured against rotation and / or inserted into a bore until its free end is a short distance from the tray bottom 9a.
  • the plug-in anchor 50 displaces the insulating material of the insulating base 7a and the insulating body 4a both radially or parallel to the contact surface 12a and at right angles thereto, so that the insulating material solidified accordingly by compression Area of the inner circumference and the blind hole-like end of the plug opening or the plug anchor 50 is located.
  • the support surfaces 49 then lie in a gap 24 or a central gap 25 on the upper side of the insulating base 7a facing the temperature sensor 30a, which lies continuously in one area in the area outside the radiators 13a over the entire heating field 17.
  • the holding body 45a can be secured in the longitudinal direction of the plug-in anchor 50, which is transverse to the longitudinal direction of the temperature sensor 30a or to the contact surface 12a, against the insulating bodies 3a, 4a in the plug-in opening by barb-like claw profiles against displacement movements.
  • the support surfaces 49 lie under the force of the bias of the temperature sensor 30a on the insulating base 7a under all operating conditions, so that the temperature sensor 30a forms a hold-down device for the insulating base 7a with the holding body 45a.
  • the working section 40a extends on both sides beyond the holding body 45a, so that the end 36a with the adjustment 37a is exposed to the direct radiation of the heating element 13a without contact and without shielding.
  • the longitudinal section of the working section 40a associated with the end 36a is shorter than that which lies on the other side of the holding body 45a.
  • Each holding body 45b or 45b ' is made exclusively from a bent piece of wire, the eyelet 46b, 46b' in the manner of a helical tension spring is wound from two closely adjacent turns.
  • the through opening 47b or 47b 'can thereby be resiliently expandable, so that the eyelet 46b or 46b' surrounds the outer periphery of the temperature sensor 30b with radial play without tension.
  • a tangentially directed away from the eyelet 46b leg of the wire 48b or 48b ' is angled at its end inwards towards the opposite side of the eyelet 46b, 46b' and thereby forms the only support surface 49b or 49b ', which is thus in view the contact surface 12b coincides approximately with the through opening 47b or 47b '.
  • the other leg is parallel to the first leg and on the opposite side of the eyelet 46b tangentially away from it in the same direction, but extended to form the plug-in anchor 50b beyond the support surface 49b.
  • This plug-in anchor 50b can extend as far as to bear against the inside of the shell bottom 9b, so that here there is an electrical ground connection between the temperature sensor 30b and the carrier shell which in turn is grounded.
  • the holding body 45b needs to accommodate a wider gap, e.g. a central gap 25, while the holding body 45b 'is suitable for a narrower gap, because in view parallel to the through hole 47b of the leg 50b' forming the support surface 49b 'at a distance between its ends or crosses approximately in the middle of their length and lies approximately radially to the eyelet.
  • the plug anchor 50b ' also penetrates the shell bottom 9b in the area of a contact surface 12b offset, possibly continuously extending shoulder around the central axis 10, through which the insulating body 4b in this area has an approximately half the plate thickness or approximately the same plate thickness as in the area of its outer circumference.
  • the plug-in anchor 50b ' On the outside of the shell bottom 9b, the shoulder of which forms a counter-member, the plug-in anchor 50b 'is provided with a separate or integrally formed securing member 51 which extends further and e.g. can be formed by deforming, such as entangling or angling the plug anchor 50b '.
  • a separate or integrally formed securing member 51 which extends further and e.g. can be formed by deforming, such as entangling or angling the plug anchor 50b '.
  • the holding body 45 b ' is positively secured against pulling out, and the molded body is held down against the sheet metal shell bottom.
  • the respective holding body can, however, perform any slight tilting movements in the transverse and / or longitudinal direction of the temperature sensor 30b.
  • the completely recessed securing member 51 or the entire holding body does not protrude from the underside of the heating unit 1b or the support shell 5b, which forms a stacking surface with the underside for storing heating units stacked one above the other.
  • the holding body 45c rests instead of on the outer circumference on an inner circumference, namely that of the outer tube 31c or the end section 39c, so that the outer circumference of the entire working section 40c can remain completely exposed.
  • the holding body 45c is formed by a rigid, non-resilient and angled bolt or rod, one leg of which is inserted from the free end into the outer tube 31c and can be formed in one piece with the adjusting member 38c or the inner rod 32c.
  • the other leg forms a support anchor 50c, which could be designed like the plug-in anchor described, but in this case forms the support surface 49c with its free end surface and does not engage in the insulating base 7c.
  • the freely protruding length of the leg approximately coaxial with the temperature sensor 30c is only approximately in the order of magnitude of the outer diameter of the cylindrical temperature sensor 30c or in the order of the length of the support armature 50c.
  • the respective holding body could also be constructed in several parts and / or from different materials, but is expediently in one part in each case, so that a very simple design results.
  • its through opening can be significantly wider than the temperature sensor and can have only individual, protruding cams distributed over the circumference for supporting the temperature sensor.
  • the plug anchor 50b or 50b 'could be provided with a pushed-on insulating bead, which is supported on the one hand on the eyelet and on the other hand on the insulating base, so that a separate support leg can be completely dispensed with.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Resistance Heating (AREA)
  • Electric Stoves And Ranges (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Baking, Grill, Roasting (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
EP92119004A 1991-11-12 1992-11-06 Strahlungs-Heizeinheit Expired - Lifetime EP0542142B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9113992U DE9113992U1 (sh) 1991-11-12 1991-11-12
DE9113992U 1991-11-12

Publications (3)

Publication Number Publication Date
EP0542142A2 EP0542142A2 (de) 1993-05-19
EP0542142A3 EP0542142A3 (en) 1993-06-09
EP0542142B1 true EP0542142B1 (de) 1995-07-12

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP92119004A Expired - Lifetime EP0542142B1 (de) 1991-11-12 1992-11-06 Strahlungs-Heizeinheit

Country Status (5)

Country Link
US (1) US5489764A (sh)
EP (1) EP0542142B1 (sh)
AT (1) ATE125098T1 (sh)
DE (2) DE9113992U1 (sh)
ES (1) ES2074794T3 (sh)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4438648A1 (de) * 1994-10-28 1996-05-02 Ego Elektro Blanc & Fischer Strahlungsheizkörper
IT240975Y1 (it) * 1996-10-25 2001-04-20 Whirpool Europ S R L Dispositivo di controllo della temperatura e di sicurezza associatoa un elemento riscaldante di un piano di cottura in vetroceramica
GB2325533B (en) * 1997-05-22 2001-08-08 Ceramaspeed Ltd Method and apparatus for controlling an electric heater
GB2335541A (en) * 1998-03-20 1999-09-22 Ceramaspeed Ltd Electric heater comprising a temperature sensing and limiting arrangement
GB2335834B (en) * 1998-03-26 2002-10-23 Ceramaspeed Ltd Radiant electric heater
DE19846512A1 (de) * 1998-10-09 2000-04-13 Ego Elektro Geraetebau Gmbh Einbau eines Gehäuses einer Schalteinrichtung
DE19942967A1 (de) * 1999-09-09 2001-03-15 Ego Elektro Geraetebau Gmbh Strahlheizkörper
DE10006954A1 (de) * 2000-02-16 2001-10-11 Bsh Bosch Siemens Hausgeraete Kochfeld mit Temperaturfühler
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Also Published As

Publication number Publication date
DE59202869D1 (de) 1995-08-17
EP0542142A2 (de) 1993-05-19
ES2074794T3 (es) 1995-09-16
EP0542142A3 (en) 1993-06-09
US5489764A (en) 1996-02-06
DE9113992U1 (sh) 1992-01-02
ATE125098T1 (de) 1995-07-15

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