EP0210575B1 - Corps de chauffe électrique à radiation pour réchauffer des plaques chauffantes ainsi que procédé et dispositif pour sa fabrication - Google Patents
Corps de chauffe électrique à radiation pour réchauffer des plaques chauffantes ainsi que procédé et dispositif pour sa fabrication Download PDFInfo
- Publication number
- EP0210575B1 EP0210575B1 EP86110033A EP86110033A EP0210575B1 EP 0210575 B1 EP0210575 B1 EP 0210575B1 EP 86110033 A EP86110033 A EP 86110033A EP 86110033 A EP86110033 A EP 86110033A EP 0210575 B1 EP0210575 B1 EP 0210575B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coil
- insulator
- heater
- heating resistor
- heating
- 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
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims description 7
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 239000012212 insulator Substances 0.000 claims abstract description 19
- 238000003825 pressing Methods 0.000 claims abstract description 8
- 239000002241 glass-ceramic Substances 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 19
- 239000011810 insulating material Substances 0.000 claims description 11
- 239000011230 binding agent Substances 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 239000002657 fibrous material Substances 0.000 abstract description 5
- 238000010411 cooking Methods 0.000 abstract description 3
- 238000000465 moulding Methods 0.000 abstract 1
- 239000000835 fiber Substances 0.000 description 6
- 239000011295 pitch Substances 0.000 description 6
- 230000035515 penetration Effects 0.000 description 5
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000002835 absorbance Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 229910021485 fumed silica Inorganic materials 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002557 mineral fiber Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 229910052902 vermiculite Inorganic materials 0.000 description 1
- 239000010455 vermiculite Substances 0.000 description 1
- 235000019354 vermiculite Nutrition 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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
- H05B3/688—Fabrication of the plates
-
- 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 an electric radiant heater for heating heating surfaces and a method and a device for its production.
- a radiant heater has become known in which heating coils with a circular cross section are embedded in the surface of an insulating body which contains fibrous material by being pressed in and thereby fixed. It is also mentioned there that the heating coils can have an oval shape, namely lying flat, i.e. with its smallest extension, i.e. the small axis towards the heating plate. This serves to save overall height.
- a radiant heater has become known in which a resistance wire bent in the form of a sinus curve band is embedded with the apexes of one side of the curve in an initially plastic, hardenable material.
- This arrangement requires an absolutely rigid fixation in hardened ceramic material, otherwise the band could tip to the side and cause short circuits with neighboring bands. This makes the radiator very thermally and mechanically sensitive and unsuitable for thin resistance wires.
- the embedding of an approximately oval wire helix on one of its narrow sides has several advantages: Given the width of the helix in the direction of the surface, that is, depending on the usable area unit, the oval shape of the wire length is somewhat longer than that of the circular helix and much larger than in the case of lying oval shape. Furthermore, the coil is fixed much better when embedding a certain fraction of its total wire length, because a much larger arc piece is held. For example, when embedding a 180 ° bend make up, for example, only a third or a quarter of the total winding circumference, so that sufficient radiation area remains.
- the helix pitch ie the proportion of the gaps between the individual turns, can also be greater, so that penetration into the embedding material is promoted.
- the penetration of the more curved side surface into the material is easier to make, and when pressed in, even thin wires do not tend to deform or fall over in the longitudinal direction of the coil and lie flat.
- This also contributes to the fact that the helix can be guided in a groove when inserted over two thirds or three quarters of its circumference and the pressure acting on the free apex presses the flatter sides of the oval against the groove walls and thereby stiffens the helix, which in the Transverse direction also has a large section modulus.
- the radiant heater 11 shown in Fig. 1 is used to heat a glass ceramic heating surface 12 or other heating surfaces made of ceramic. Although it is preferably intended for heating one of several hotplates on a coherent cooking surface, it can also be used for single hotplates etc.
- the radiant heater 11 contains a sheet metal carrier shell 13, in which a plate-like insulating body 14 with a round bottom 15 and a peripheral edge 16 is arranged like the carrier shell.
- this mechanically quite firm and manageable insulating body 14 can be underlaid by an insulating layer 17, which is less mechanically strong but has excellent thermal insulation, for example made of pyrogenic silica.
- the insulating body is pressed with the upper end face of the edge 16 onto the underside of the cooking surface 12 by spring elements, not shown. It preferably consists of a fibrous, high-temperature-resistant insulating material, for example an aluminum oxide fiber, which is commercially available under the name "Fiberfrax". Other mineral fibers or other compressible insulating materials, such as vermiculite, can also be used.
- Heating coils 20 made of wire-shaped electrical resistance material 21 are partially pressed and fixed into the substantially flat surface 18 of the bottom 15 of the insulating body 14.
- Each turn 60 of the heating coil 20 has an approximately oval shape, which can be seen in particular in FIG. 3, which consists of two approximately semicircular arches on the narrow sides of the oval and two connecting them, essentially rectilinear or slightly outward or inward (dash-dotted line in Fig. 3) there are curved sides 24, 25.
- the more curved narrow sides 22, 23 can, in deviation from the semicircular shape, be slightly more curved in the area of their apex 26.
- the insulating body 14 is produced according to the following method: from a slurry of the insulating fibers in water, to which inorganic or organic binders of the usual type are also added, the fibers are sucked in by a suction mold which has a negative in the thickness of the insulating body, but with a free lower one Bottom 29 forms. A resulting thickening on the bottom 29 is cut off and, if necessary after a pre-pressing, the soft, moist insulating body 14 '(FIG. 5) is introduced into a mold 30.
- the prepared oval heating coils are inserted over their entire length into grooves 33 in the area of non-distorted ends after welding of connecting pins 28, the shape of which corresponds to the oval shape of the heating coils 20, but has a smaller depth.
- the oval heating coils are thus inserted into the grooves 33 with an upright cross section and project with about a third to a quarter of their larger cross sectional dimensions a (FIG. 3) over a pressing surface 34 of the punch 32 carrying the grooves.
- the width of the grooves is such that the heating coils can be inserted well, but are guided as precisely as possible.
- the grooves 33 run in the case of circular radiators mostly spirally, in single or multi-course spirals or also a double spiral, which has a reversal point in the middle and can consist of one or more spiral sections, each of which is provided with electrical connection pins 28, which are provided with the insulator 14 lead wires 61 are welded.
- the insertion die 32 and the mold 30 are moved relatively towards each other in the direction of the arrows 34 and 35 and the insertion die presses the still plastically deformable insulating body preform 14 'into its final shape 14, which can be seen in FIG. 6.
- the heating coils 20 with their Narrow sides 22 pressed or pressed into the surface 18 and thus the material of the insulating body and fixed.
- the heating coils consist of very thin resistance material in the order of magnitude between 0.15 and 0.25 mm, this would hardly be possible with round coils. Due to the oval shape and the good guidance in the grooves 33, even greater compressions of the insulating body and thus a good fixing can be achieved. Due to the good guidance, the helixes do not tend to buckle laterally and cannot fall over in the longitudinal direction of the helix because the pressure on the curved section 22 of the helix spreads the sides 24 and 25 somewhat apart and clamps them on the groove inner wall (FIG. 6). A good definition also contributes to the fact that the helix pitch h (FIG.
- the embedding can be more or less complete and deep and the depressions 43 can also be completely closed, in particular if a less elastic and fibrous material is used.
- Fig. 3 it can be seen that the embedding of the coil on the outer edge of each turn is slightly higher than on the inner edge, so that a flat channel forms in the area of the heating coil, which favors the fixing. Above all, however, it can be seen that it is possible to keep the majority of the interior 45 of the insulating material free, so that no heat accumulation can form there, which could lead to premature mechanical and thermal wear of the heating coils.
- the insertion die 32 and the mold 30 are removed from one another again, the heating coils remaining in the insulating body. They can be easily pulled out of the grooves 33 because they spring back a little when the punch is relieved and have play with the groove walls.
- the now pressed, but still moist insulating body 14 is now brought into its relatively solid final state by drying or other hardening measures.
- the invention makes it possible to accommodate large lengths of wire on a given unit area, so that even radiators in a multi-cycle circuit with small ones Partial services can be produced.
- the relatively large ratio between the possible helix pitch h to the wire diameter d of the resistance material 21, preferably h / d 2 to 10, also contributes to the radiation and ventilation conditions being good. Since, in addition to the extension of the wire diameter for a given width, the oval shape also improves the fixability, it is possible to arrange the spirals in relatively closely spaced spiral paths, so that this also increases the wire length to be accommodated per unit area and enables very uniform heating.
- the preferred uniform fixing of the heating coils over their entire length also avoids creeping movements of the coil and creates short-circuit protection even at a short distance.
- a value of more than 1.5, preferably approximately 2 has proven to be the preferred ratio between the length of the large axis a of the oval helical cross section directed towards the heating surface 12 and away from the insulating body, in the direction of the small oval axis 51.
- the large axis 50 (FIG. 3) is approximately perpendicular to the surface of the insulating body 18.
- the good guidance and stability of the heating coil and the "cutting effect" of the relatively thin usable wires also make it possible to press-fit into insulating materials whose resistance to penetration is relatively high and can be used after pressing without hardening or drying process. This includes, in particular, granular insulation materials.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Resistance Heating (AREA)
- Treatments Of Macromolecular Shaped Articles (AREA)
- General Induction Heating (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Claims (11)
- Corps de chauffage électrique à rayonnement pour le chauffage de surfaces chauffantes (12), notamment de plaques de cuisson en vitrocéramique, comprenant un corps isolateur (14) réalisé en une matière électriquement et thermiquement isolante, à la surface (18) de laquelle une résistance chauffante (20) au moins, constituée d'un filament incurvé selon un rayon de courbure non uniforme, est partiellement scellée au niveau d'une partie ayant une courbure plus forte, l'extension diamétrale la plus grande de la résistance chauffante (20) étant orientée dans un sens qui s'éloigne de la surface (18) du corps isolateur (14), caractérisé en ce que la résistance chauffante (20) est constituée par une spirale chauffante comprenant de nombreuses spires d'un matériau (21) de résistance électrique, espacées les unes des autres, la section des spires de cette spirale étant essentiellement ovoïde, comprenant un axe plus long et un axe plus court (50, 51), les côtés opposés (22, 23; 24, 25) de chaque spire décrivant respectivement une courbure plus forte et une courbure moins forte voire même, le cas échéant, une ligne droite, et en ce que les parties scellées (42) du filament s'étendent à peu près transversalement au sens de l'extension longitudinale de la résistance chauffante (20), et en ce que le corps isolateur (14) est constitué principalement de fibres (44) liées en un corps relativement rigide, le matériau (21) de résistance situé au niveau des parties scellées (42) des spires étant de préférence prisonnier des fibres (44) du corps isolateur (14) pénétrant vers l'intérieur de la spire, alors que le restant de la zone intérieure (45) de la spire est, dans l'ensemble, dégagé du matériau isolateur.
- Corps de chauffage électrique à rayonnement, pour le chauffage de surfaces chauffantes (12), notamment de plaques de cuisson en vitrocéramique, comprenant un corps isolateur (14) réalisé en une matière électriquement et thermiquement isolante, à la surface (18) de laquelle une résistance chauffante (20) au moins, constituée d'un filament incurvé selon un rayon de courbure non uniforme, est scellée au niveau d'une partie ayant une courbure plus forte, l'extension diamétrale la plus grande de la résistance chauffante (20) étant orientée dans un sens qui s'éloigne de la surface (18) du corps isolateur (14), caractérisé en ce que la résistance chauffante (20) est constituée par une spirale chauffante comprenant de nombreuses spires d'un matériau (21) de résistance électrique, espacées les unes des autres, la section des spires de cette spirale étant essentiellement ovoïde, comprenant un axe plus long et un axe plus court (50, 51), les côtés opposés (22, 23; 24, 25) de chaque spire décrivant respectivement une courbure plus forte et une courbure moins forte voire même, le cas échéant, une ligne droite, et en ce que les parties scellées (42) du filament s'étendent à peu près transversalement au sens de l'extension longitudinale de la résistance chauffante (20), et en ce que le corps isolateur (14) est constitué d'un matériau isolant granuleux utilisable sans opération de durcissement après l'application de la pression, le matériau (21) de résistance situé au niveau des parties scellées (42) des spires étant de préférence prisonnier des parties du corps isolant (14) qui pénètrent partiellement à l'intérieur de la spire, alors que le restant de la zone intérieure (45) de la spire est, dans l'ensemble, dégagé du matériau isolateur.
- Corps de chauffage à rayonnement selon l'une des revendications 1 ou 2, caractérisé en ce que la section ovoïde des spires comporte deux côtés (22, 23) de forme à peu près semi-circulaire, incurvés plus fortement de préférence au niveau de leur crête, et des côtés latéraux (24, 25) du matériau (21) de résistance chauffante, raccordant les deux premiers l'un à l'autre et s'étendant essentiellement en ligne droite, la partie scellée située sur les côtés externes de la spirale chauffante (20) s'étendant de préférence jusqu'aux côtés (24, 25), étendus essentiellement en ligne droite, du matériau isolateur (21).
- Corps de chauffage à rayonnement selon l'une des revendications précédentes, caractérisé en ce que le scellement est réalisé de façon essentiellement uni forme pour chacune des spires (60), sur toute la longueur de la spirale chauffante (20), mais n'occupe qu'une partie (42) représentant une fraction de la circonférence de la spire.
- Corps de chauffage à rayonnement selon l'une des revendications précédentes, caractérisé en ce que la partie scellée (42) est logée dans des renfoncements (43) obtenus par pression, qui s'étendent dans le sens de l'enroulement des spires et sont partiellement ouverts vers la surface (18) du corps isolateur (14), et/ou en ce que le matériau du corps isolateur (14) englobe les spires (60) du matériau (21) de résistance dans une plus grande mesure sur leurs surfaces externes que sur les surfaces internes (45) des spires.
- Corps de chauffage à rayonnement selon l'une des revendications précédentes, caractérisé en ce que plusieurs spirales différentes (20) sont scellées dans un corps isolateur (14) dans des rainures spiroïdales.
- Corps de chauffage à rayonnement selon l'une des revendications précédentes, caractérisé en ce que le rapport entre le grand axe et le petit axe (50, 51) de la section ovoïde de la spire est supérieur à 1,5, et est de préférence de l'ordre de 2, et/ou en ce que le rapport entre le pas (h) des spires et le diamètre (d) du matériau (21) de résistance est supérieur à 2, et est situé de préférence entre 4 et 8.
- Procédé de fabrication d'un corps chauffant électrique à rayonnement, lors duquel une résistance chauffante ayant des parties incurvées est enfoncée dans la surface (18) d'un corps isolateur (14) déformable de façon plastique, caractérisé en ce que la résistance chauffante est une spirale chauffante (20) ayant une section globalement ovoïde, dont le côté étroit (22) est enfoncé dans le corps isolateur, et en ce qu'à cette fin, une spirale circulaire est déformée sous une pression latérale, pour donner aux spires leur forme ovoïde, est étirée axialement, et est maintenue sur plus de la moitié de la circonférence des spires, la section des spires étant orientée verticalement, et est enfonée, par sa partie libre non maintenue, dans la surface (18) du corps isolateur (14) composé principalement de fibres ou d'un matériau granuleux non durci, voire non séché après cette opération.
- Procédé selon la revendication 8, caractérisé en ce que l'insertion sous pression de la spirale s'effectue dans le corps isolateur (14) humide, constitué principalement de fibres isolantes mélangées avec des agents liants, et en ce qu'en particulier le corps isolateur (14) est durci, le cas échéant, par séchage, après l'insertion de la spirale chauffante (20).
- Procédé selon l'une des revendications 8 ou 9, caractérisé en ce que, lors de l'insertion sous pression de la spirale chauffante (20), le corps isolateur (14) est mis en forme sous pression afin de lui donner sa forme définitive.
- Dispositif de fabrication d'un corps de chauffage électrique, caractérisé par une étampe (32) d'insertion, qui comporte au moins une rainure (33) ayant de préférence une forme spiroïdale, pour recevoir une spirale chauffante (20) ovale ayant des spires dont la section est orientée verticalement, cette rainure étant si profonde qu'elle maintient les spires sur plus de la moitié, de préférence sur 60 % de la cote (a) des spires, dans le sens du plus grand axe (50) de l'ovale, et guide les spires sur leurs côtés.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT86110033T ATE72615T1 (de) | 1985-07-31 | 1986-07-22 | Elektrischer strahlheizkoerper zur beheizung von heizflaechen sowie verfahren und vorrichtung zu seiner herstellung. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3527413 | 1985-07-31 | ||
DE19853527413 DE3527413A1 (de) | 1985-07-31 | 1985-07-31 | Elektrischer strahlheizkoerper zur beheizung von heizflaechen sowie verfahren und vorrichtung zu seiner herstellung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0210575A1 EP0210575A1 (fr) | 1987-02-04 |
EP0210575B1 true EP0210575B1 (fr) | 1992-02-12 |
Family
ID=6277271
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86110033A Expired - Lifetime EP0210575B1 (fr) | 1985-07-31 | 1986-07-22 | Corps de chauffe électrique à radiation pour réchauffer des plaques chauffantes ainsi que procédé et dispositif pour sa fabrication |
Country Status (9)
Country | Link |
---|---|
US (1) | US4789773A (fr) |
EP (1) | EP0210575B1 (fr) |
JP (1) | JPS6235487A (fr) |
AT (1) | ATE72615T1 (fr) |
AU (1) | AU600906B2 (fr) |
DE (2) | DE3527413A1 (fr) |
ES (1) | ES2000793A6 (fr) |
YU (1) | YU133986A (fr) |
ZA (1) | ZA865596B (fr) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3828192A1 (de) * | 1988-08-19 | 1990-02-22 | Ego Elektro Blanc & Fischer | Strahlheizkoerper sowie verfahren und vorrichtung zu seiner herstellung |
DE4019898A1 (de) * | 1990-06-22 | 1992-01-02 | Ego Elektro Blanc & Fischer | Verfahren und vorrichtung zum befestigen von heizwiderstaenden auf einem traeger |
US5796075A (en) * | 1992-03-09 | 1998-08-18 | E.G.O. Elektro-Gerate Blanc Und Fisher Gmbh & Co. Kg | Heater, particularly for kitchen appliances |
DE4229375C2 (de) * | 1992-09-03 | 2000-05-04 | Ego Elektro Blanc & Fischer | Strahlungs-Heizkörper |
DE9214270U1 (de) * | 1992-10-22 | 1994-04-07 | Fritz Eichenauer Gmbh & Co Kg, 76870 Kandel | Elektrischer Strahlungsheizeinsatz für Glaskeramik-Kochfeld |
GB2275160B (en) * | 1993-02-11 | 1996-04-03 | Ceramaspeed Ltd | Method of manufacturing a radiant electric heater |
GB2275161B (en) * | 1993-02-11 | 1996-05-15 | Ceramaspeed Ltd | Method of manufacturing a radiant electric heater |
GB2275162B (en) * | 1993-02-11 | 1996-04-10 | Ceramaspeed Ltd | Radiant electric heater method |
GB2278261B (en) * | 1993-05-21 | 1996-07-03 | Ceramaspeed Ltd | Method of manufacturing a radiant electric heater |
DE4320214A1 (de) * | 1993-06-18 | 1994-12-22 | Belzig Elektrowaerme Gmbh | Anordnungen elektrischer Verbindungen und Elemente hierfür |
DE19522798A1 (de) * | 1995-06-23 | 1997-01-02 | Ego Elektro Blanc & Fischer | Verfahren zur Herstellung eines Strahlungsheizkörpers und Strahlungsheizkörper |
US6194689B1 (en) * | 1998-05-11 | 2001-02-27 | Emerson Electric Co. | Radiant heater element for use in grill and the like |
US6232630B1 (en) | 1999-07-07 | 2001-05-15 | Advanced Micro Devices, Inc. | Light floating gate doping to improve tunnel oxide reliability |
DE102006001151B3 (de) * | 2006-01-06 | 2007-05-10 | Von Ardenne Anlagentechnik Gmbh | Heizerfeld eines Strahlungsheizers mit einer Heizspirale |
GB0811980D0 (en) * | 2008-07-07 | 2008-07-30 | Ceramaspeed Ltd | Radiant electric heater |
CN102346420B (zh) * | 2010-07-21 | 2015-04-22 | 卡西欧电子工业株式会社 | 用于对在记录介质上形成的消色性调色剂图像进行消色的消色装置 |
US9113501B2 (en) | 2012-05-25 | 2015-08-18 | Watlow Electric Manufacturing Company | Variable pitch resistance coil heater |
US20210041108A1 (en) * | 2019-08-09 | 2021-02-11 | Eidon, Llc | Apparatuses for radiant heating |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE464026A (fr) * | ||||
US2235091A (en) * | 1936-09-12 | 1941-03-18 | Samuel S Vineberg | Heating unit for electrical cooking devices |
FR880865A (fr) * | 1941-03-31 | 1943-04-07 | Dispositif de chauffage | |
FR929589A (fr) * | 1945-06-21 | 1947-12-31 | élément chauffant à résistance électrique perfectionné | |
US3047702A (en) * | 1958-10-03 | 1962-07-31 | Fredrick L Lefebvre | Plate heater |
US3991298A (en) * | 1975-07-28 | 1976-11-09 | Gould Inc. | Heating unit for a ceramic top electric range |
DE2551137C2 (de) * | 1975-11-14 | 1986-04-24 | E.G.O. Elektro-Geräte Blanc u. Fischer, 7519 Oberderdingen | Elektrischer Strahlungsheizkörper für Glaskeramikkochplatten |
ZA774922B (en) * | 1977-03-09 | 1978-06-28 | Emerson Electric Co | Open coil heater |
SE7806238L (sv) * | 1977-07-02 | 1979-01-03 | Fischer Karl | Elektriskt stralningsvermeelement, serskilt for glaskeramikkokhell |
DE2729929C3 (de) * | 1977-07-02 | 1981-10-08 | Karl 7519 Oberderdingen Fischer | Strahlungs-Heizeinheit für Glaskeramik-Elektrokochgeräte |
DE2820138A1 (de) * | 1978-05-09 | 1979-11-15 | Karl Fischer | Strahlungs-heizeinheit insbesondere fuer glaskeramik-elektrokochgeraete |
GB2011768B (en) * | 1977-12-21 | 1982-03-17 | Gen Signal Corp | Electric heating units |
DE2950302A1 (de) * | 1979-12-14 | 1981-06-19 | E.G.O. Elektro-Geräte Blanc u. Fischer, 7519 Oberderdingen | Elektrischer strahlheizkoerper sowie verfahren und vorrichtung zu seiner herstellung |
LU82075A1 (fr) * | 1980-01-10 | 1980-04-23 | Belge Isolants | Element de chauffage electrique |
NZ197851A (en) * | 1980-08-13 | 1984-09-28 | Micropore International Ltd | Cooker element:temperature sensor receives heated air |
DE3129239A1 (de) * | 1981-07-24 | 1983-02-10 | E.G.O. Elektro-Geräte Blanc u. Fischer, 7519 Oberderdingen | Elektrischer heizkoerper fuer die beheizung einer platte und verfahren zu seiner herstellung |
DE3275804D1 (en) * | 1982-10-20 | 1987-04-23 | Elpag Ag Chur | Electric heating device for ranges or cooking plates |
DE3437940C2 (de) * | 1984-10-17 | 1986-08-14 | Roland Ing.(grad.) 5828 Ennepetal Abicht | Haltevorrichtung für einen elektrischen Heizleiter in einem Formkörper aus Isolierstoff |
-
1985
- 1985-07-31 DE DE19853527413 patent/DE3527413A1/de not_active Withdrawn
-
1986
- 1986-07-11 AU AU60091/86A patent/AU600906B2/en not_active Ceased
- 1986-07-18 US US06/887,255 patent/US4789773A/en not_active Expired - Fee Related
- 1986-07-20 YU YU01339/86A patent/YU133986A/xx unknown
- 1986-07-22 DE DE8686110033T patent/DE3683881D1/de not_active Expired - Fee Related
- 1986-07-22 EP EP86110033A patent/EP0210575B1/fr not_active Expired - Lifetime
- 1986-07-22 AT AT86110033T patent/ATE72615T1/de not_active IP Right Cessation
- 1986-07-28 ZA ZA865596A patent/ZA865596B/xx unknown
- 1986-07-29 JP JP61176846A patent/JPS6235487A/ja active Pending
- 1986-07-30 ES ES8600716A patent/ES2000793A6/es not_active Expired
Also Published As
Publication number | Publication date |
---|---|
ES2000793A6 (es) | 1988-03-16 |
EP0210575A1 (fr) | 1987-02-04 |
DE3683881D1 (de) | 1992-03-26 |
JPS6235487A (ja) | 1987-02-16 |
AU600906B2 (en) | 1990-08-30 |
US4789773A (en) | 1988-12-06 |
ATE72615T1 (de) | 1992-02-15 |
YU133986A (en) | 1988-04-30 |
ZA865596B (en) | 1987-03-25 |
DE3527413A1 (de) | 1987-02-12 |
AU6009186A (en) | 1987-02-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0210575B1 (fr) | Corps de chauffe électrique à radiation pour réchauffer des plaques chauffantes ainsi que procédé et dispositif pour sa fabrication | |
EP0204185B1 (fr) | Unité de chauffage à radiation | |
EP0071048B1 (fr) | Elément de chauffage électrique par radiation et procédé pour sa fabrication | |
EP0031514B1 (fr) | Radiateur de chauffage électrique ainsi que procédé et dispositif pour sa fabrication | |
DE3043209C2 (de) | Preßverbinder für elektrische Leitungen | |
DE2545011A1 (de) | Anwuergverbindung und verfahren zu ihrer herstellung | |
EP2353837B1 (fr) | Dispositif de chauffage électrique doté d'un tuyau oméga | |
DE2325245A1 (de) | Mikrokanalplatte fuer sekundaerelektronenemission und verfahren zur herstellung einer derartigen platte | |
EP0355388A1 (fr) | Elément de chauffage par rayonnement ainsi que procédé et dispositif de fabrication | |
DE19518109A1 (de) | Strahlungs-Heizer | |
DE2825980A1 (de) | Elektrischer rohrheizkoerper und verfahren zu seiner herstellung | |
CH627312A5 (fr) | ||
DE10316908A1 (de) | Heizvorrichtung | |
EP2056649B1 (fr) | Support pour un dispositif de chauffage électrique et dispositif de chauffage électrique ainsi que procédé de fabrication | |
DE3539881A1 (de) | Elektrischer strahlheizkoerper zur beheizung von heizflaechen sowie verfahren und vorrichtung zu seiner herstellung | |
DE102007010958A1 (de) | Heizölvorwärmer | |
AT524059B1 (de) | Isolierbetonschale | |
DE4320214A1 (de) | Anordnungen elektrischer Verbindungen und Elemente hierfür | |
WO2014135557A1 (fr) | Élément de contact à clip pour carte de circuits imprimés et procédé pour sa fabrication | |
DE102008056083B4 (de) | Verfahren zum Herstellen einer Heizvorrichtung und Heizvorrichtung | |
DE1440048B2 (de) | Rohrförmiger innengekühlter elektrischer Leiter mit ungleichförmigen Wandungen und Verfahren zu dessen Herstellung | |
EP3503671B1 (fr) | Dispositif de chauffage électrique ainsi que son procédé de fabrication | |
WO2022167649A1 (fr) | Procédé de fabrication d'une cartouche chauffante tubulaire pour dispositifs de chauffage électrique, ébauche d'élément chauffant pour une telle cartouche chauffante, et cartouche chauffante | |
DE1440048C (de) | Rohrförmiger innengekühlter elektrischer Leiter mit ungleichförmigen Wandungen und Verfahren zu dessen Herstellung | |
DE1805639C3 (de) | Elektrischer Heizkörper fur gasförmige Medien |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT CH DE FR GB IT LI SE |
|
17P | Request for examination filed |
Effective date: 19870409 |
|
17Q | First examination report despatched |
Effective date: 19890228 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT CH DE FR GB IT LI SE |
|
REF | Corresponds to: |
Ref document number: 72615 Country of ref document: AT Date of ref document: 19920215 Kind code of ref document: T |
|
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) | ||
REF | Corresponds to: |
Ref document number: 3683881 Country of ref document: DE Date of ref document: 19920326 |
|
ITF | It: translation for a ep patent filed | ||
ET | Fr: translation filed | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 19920710 Year of fee payment: 7 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19920716 Year of fee payment: 7 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Effective date: 19920722 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Effective date: 19920723 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Effective date: 19920731 Ref country code: CH Effective date: 19920731 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 19920917 Year of fee payment: 7 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Effective date: 19930722 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 19930722 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Effective date: 19940331 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Effective date: 19940401 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
EUG | Se: european patent has lapsed |
Ref document number: 86110033.7 Effective date: 19930204 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20050722 |