EP0300938A1 - Electrical heating device - Google Patents
Electrical heating device Download PDFInfo
- Publication number
- EP0300938A1 EP0300938A1 EP88440059A EP88440059A EP0300938A1 EP 0300938 A1 EP0300938 A1 EP 0300938A1 EP 88440059 A EP88440059 A EP 88440059A EP 88440059 A EP88440059 A EP 88440059A EP 0300938 A1 EP0300938 A1 EP 0300938A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bulb
- radiating plate
- voltage
- reflective element
- electric
- 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.)
- Withdrawn
Links
- 238000010438 heat treatment Methods 0.000 title abstract description 13
- 238000005485 electric heating Methods 0.000 claims description 5
- 239000003973 paint Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 2
- 229910052571 earthenware Inorganic materials 0.000 claims description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 2
- 229910052721 tungsten Inorganic materials 0.000 claims description 2
- 239000010937 tungsten Substances 0.000 claims description 2
- 229940020445 flector Drugs 0.000 claims 1
- 230000005855 radiation Effects 0.000 description 3
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction 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
- H05B3/0033—Heating devices using lamps
- H05B3/009—Heating devices using lamps heating devices not specially adapted for a particular application
Definitions
- the present invention relates to the field of space heating, in particular by electric heating and relates to an electric heating device.
- a heating device using an electric bulb placed in a housing is also known from FR-A-1 305 731 .
- the heating of the bulb in the housing is transmitted to the wall of the housing and, through the latter, to the medium to be heated.
- FR-A-927 680 describes a heating device in the form of a box in which is inserted a light bulb and one of the faces of which forms a radiating body.
- the present invention aims to overcome these drawbacks.
- an electric heating device essentially constituted by at least one electric bulb arranged in an assembly comprising a radiating plate, characterized in that the electric bulb is supplied at a voltage lower than its normal voltage and in that said bulb is housed in a sealed space delimited behind the radiating plate by a reflective element.
- the electric heating device is essentially constituted by at least one electric bulb 1 which is arranged in an assembly comprising a radiating plate 2, and is characterized in that the electric bulb 1 is supplied at a voltage lower than its normal voltage and that said bulb 1 is housed in a sealed space delimited behind the radiating plate 2 by a reflective element 3.
- the bulb 1 is advantageously disposed centrally in the device by mounting by means of a receiving base 4 fitting in leaktight manner on the reflective element 3.
- the supply voltage of the bulb 1 is preferably equal to 70% of its normal operating voltage.
- the bulb 1 advantageously comprises a tungsten filament.
- the constitution of the bulb 1 and its mode of supply, namely with undervoltage, make it possible to obtain a device having a large length speed of operation at high temperature.
- the radiating plate 2 is preferably made of earthenware or ceramic. These materials have a high calorific radiation power, namely much higher than that obtained with metals.
- the radiating plate 2 is provided on its internal face, facing the bulb 1, with a layer 5 of paint absorbing heat energy, for example a layer of black paint.
- the reflective element 3 is in the form of a metallic element with a conical vertical section. Thus, this element will have a conical or pyramidal shape depending on the geometry of the radiating plate 3. This particular section of the reflective element 3 allows obtaining an optimal direct reflection of the heat energy radiated by the bulb. 1 on the rear face of the radiating plate 2 and therefore a significantly improved heat efficiency of the device according to the invention compared to the known devices described above.
- the reflector 3 advantageously has a taper such that the bulb 1, in the mounted position, extends, by its end, in the immediate vicinity of the rear face of the radiating plate 2.
- the device is in the form of a modular element.
- it is possible to juxtapose a number of devices in accordance with the invention on an assembly frame in order to form a high power heating element.
- a device having a radiant plate of 2.25 dm2 of surface area, equipped with a 23 W bulb, with a normal operating voltage of 13.5 V and supplied with 70% of this voltage has a surface temperature of said plate 2 of 105 ° C.
- the consumption of electrical power is very low compared to the calorific power obtained.
- the use of 24 devices of the type described above makes it possible to obtain a heating surface of 0.54 m2, the temperature of which is 105 ° C., this assembly consuming only 313 W.
Landscapes
- Control Of Resistance Heating (AREA)
- Resistance Heating (AREA)
Abstract
Description
La présente invention concerne le domaine du chauffage des locaux, en particulier par chauffage électrique et a pour objet un dispositif de chauffage électrique.The present invention relates to the field of space heating, in particular by electric heating and relates to an electric heating device.
Il existe actuellement différents dispositifs de chauffages électriques consistant, généralement, en une disposition de résistances électriques, soit directement derrière des caches et chauffant par circulation d'air, soit dans des éléments réfractaires restituant la chaleur par l'intermédiaire d'un flux d'air commandé.There are currently various electrical heating devices, generally consisting of an arrangement of electrical resistances, either directly behind covers and heating by air circulation, or in refractory elements restoring heat via a flow of air controlled.
On connaît également, par FR-A-1 305 731 un dispositif de chauffage faisant intervenir une ampoule électrique disposée dans un logement. Dans ce mode de réalisation, l'échauffement de l'ampoule dans le logement est transmis à la paroi du logement et, par l'intermédiaire de cette dernière, au milieu à chauffer.Also known from FR-A-1 305 731 is a heating device using an electric bulb placed in a housing. In this embodiment, the heating of the bulb in the housing is transmitted to the wall of the housing and, through the latter, to the medium to be heated.
Un dispositif analogue est décrit dans US-A-2 515 659 et dans FR-A-1 502 839. Enfin, FR-A-927 680 décrit un appareil de chauffage sous forme d'une boîte dans laquelle est insérée une ampoule électrique et dont l'une des faces forme un corps rayonnant.A similar device is described in US-A-2 515 659 and in FR-A-1 502 839. Finally, FR-A-927 680 describes a heating device in the form of a box in which is inserted a light bulb and one of the faces of which forms a radiating body.
Ces dispositifs de chauffages électriques au moyen d'ampoules connus présentent, cependant, l'inconvénient de fonctionner à la tension nominale des ampoules, qui sont, en outre, de simples ampoules d éclairage, de sorte que lesdites ampoules "grillent" très rapidement et que le mode de chauffage ainsi obtenu en est considérablement renchéri. De plus, le rendement de ces dispositifs connus est très faible du fait d'une mauvaise orientation du rayonnement calorifique des ampoules et d'une disposition de ces dernières dans des montages souvent non étanchéifiés, ce qui entraine une déperdition calorifique par circulation d'air.These electrical heating devices by means of known bulbs have, however, the disadvantage of operating at the nominal voltage of the bulbs, which are, in addition, simple light bulbs, so that said bulbs "burn out" very quickly and that the heating method thus obtained is considerably more expensive. In addition, the efficiency of these known devices is very low due to a poor orientation of the heat radiation from the bulbs and an arrangement of the latter in assemblies often not sealed, which results in heat loss by air circulation. .
La présente invention a pour but de pallier ces inconvénients.The present invention aims to overcome these drawbacks.
Elle a, en effet, pour objet, un dispositif de chauffage électrique, essentiellement constitué par au moins une ampoule électrique disposée dans un montage comportant une plaque rayonnante, caractérisé en ce que l'ampoule électrique est alimentée à une tension inférieure à sa tension normale et en ce que ladite ampoule est logée dans un espace étanche délimité derrière la plaque rayonnante par un élément réflecteur.It has, in fact, for object, an electric heating device, essentially constituted by at least one electric bulb arranged in an assembly comprising a radiating plate, characterized in that the electric bulb is supplied at a voltage lower than its normal voltage and in that said bulb is housed in a sealed space delimited behind the radiating plate by a reflective element.
L'invention sera mieux comprise grâce à la description ci-après, qui se rapporte à un mode de réalisation préféré, donné à titre d'exemple non limitatif, et expliqué avec référence au dessin schématique annexé, dont la figure unique est une vue en coupe du dispositif conforme à l'invention.The invention will be better understood thanks to the description below, which relates to a preferred embodiment, given by way of nonlimiting example, and explained with reference to the appended schematic drawing, the single figure of which is a view in section of the device according to the invention.
Le dispositif de chauffage électrique, conforme à l'invention, représenté, à titre d'exemple, au dessin annexé, est essentiellement constitué par au moins une ampoule electrique 1 qui est disposée dans un montage comportant une plaque rayonnante 2, et est caractérisée en ce que l'ampoule électrique 1 est alimentée à une tension inférieure à sa tension normale et en ce que ladite ampoule 1 est logée dans un espace étanche délimité derrière la plaque rayonnante 2 par un élément réflecteur 3.The electric heating device, according to the invention, shown, by way of example, in the accompanying drawing, is essentially constituted by at least one electric bulb 1 which is arranged in an assembly comprising a
L'ampoule 1 est avantageusement disposée de manière centrale dans le dispositif par montage au moyen d'un culot de réception 4 s'emboitant de manière étanche sur l'élément réflecteur 3.The bulb 1 is advantageously disposed centrally in the device by mounting by means of a receiving base 4 fitting in leaktight manner on the
La tension d'alimentation de l'ampoule 1 est, de préférence, égale à 70 % de sa tension normale de fonctionnement.The supply voltage of the bulb 1 is preferably equal to 70% of its normal operating voltage.
L'ampoule 1 comporte avantageusement un filament en tungstène.The bulb 1 advantageously comprises a tungsten filament.
La constitution de l'ampoule 1 et son mode d'alimentation, à savoir avec sous-tension, permettent l'obtention d'un dispositif présentant une grande lon gévité de fonctionnement à température élevée.The constitution of the bulb 1 and its mode of supply, namely with undervoltage, make it possible to obtain a device having a large length speed of operation at high temperature.
La plaque rayonnante 2 est constituée, de préférence, en faïence ou en céramique. Ces matériaux présentent un haut pouvoir de rayonnement calorifique, à savoir très supérieur à celui obtenu avec des métaux.The
Selon une caractéristique de l'invention, la plaque rayonnante 2 est pourvue sur sa face interne, tournée vers l'ampoule 1, d'une couche 5 de peinture absorbante de l'énergie calorifique, par exemple d'une couche de peinture noire.According to a characteristic of the invention, the
L'élément réflecteur 3 se présente sous forme d'un élément métallique à section verticale conique. Ainsi, cet élément présentera une forme conique ou pyramidale en fonction de la géométrie de la plaque rayonnante 3. Cette section particulière de l'élément réflecteur 3 permet l'obtention d'une réflection directe optimale de l'énergie calorifique rayonnée par l'ampoule 1 sur la face arrière de la plaque rayonnante 2 et donc un rendement calorifique nettement amélioré du dispositif conforme à l'invention par rapport aux dispositifs connus décrits précédemment.The
Le réflecteur 3 présente avantageusement une conicité telle que l'ampoule 1, en position montée, s'étende, par son extrémité, à proximité immédiate de la face arrière de la plaque rayonnante 2.The
Conformément à une autre caractéristique de l'invention, le dispositif se présente sous forme d'un élément modulaire. Ainsi, il est possible de juxtaposer un certain nombre de dispositifs conformes à l'invention sur un cadre d assemblage afin de former un élément chauffant de grande puissance.According to another characteristic of the invention, the device is in the form of a modular element. Thus, it is possible to juxtapose a number of devices in accordance with the invention on an assembly frame in order to form a high power heating element.
A titre d'exemple, un dispositif présentant une plaque rayonnante de 2,25 dm² de surface, équipé d'une ampoule de 23 W, d'une tension normale de fonctionnement de 13,5 V et alimentée à 70 % de cette tension, présente une température de surface de ladite plaque 2 de 105 °C.For example, a device having a radiant plate of 2.25 dm² of surface area, equipped with a 23 W bulb, with a normal operating voltage of 13.5 V and supplied with 70% of this voltage, has a surface temperature of
Dans le cas d'un assemblage d'éléments modulaires constitués par des dispositifs conformes à l'inven tion, la consommation de puissance électrique est très faible par rapport à la puissance calorifique obtenue. Par exemple, l'utilisation de 24 dispositifs du type de celui décrit ci-dessus permet l'obtention d'une surface de chauffage de 0,54 m² , dont la température est de 105 °C, cet ensemble ne consommant que 313 W.In the case of an assembly of modular elements constituted by devices in accordance with the invention tion, the consumption of electrical power is very low compared to the calorific power obtained. For example, the use of 24 devices of the type described above makes it possible to obtain a heating surface of 0.54 m², the temperature of which is 105 ° C., this assembly consuming only 313 W.
Grâce à l'invention, il est possible de réaliser des dispositifs de chauffage électrique récupérant le rayonnement thermique d'ampoules alimentées sous une tension inférieure à leur tension normale d'alimentation et disposées dans des enceintes parfaitement étanches.Thanks to the invention, it is possible to produce electrical heating devices recovering the thermal radiation from light bulbs supplied at a voltage lower than their normal supply voltage and arranged in perfectly sealed enclosures.
Ces dispositifs permettent l'obtention d'une énergie calorifique importante avec une consommation électrique relativement faible et sont donc particulièrement économiques.These devices make it possible to obtain a high calorific energy with a relatively low electrical consumption and are therefore particularly economical.
Bien entendu, l'invention n'est pas limitée au mode de réalisation décrit et représenté au dessin annexé. Des modifications restent possibles, notamment du point de vue de la constitution des divers éléments ou par substitution d'équivalents techniques, sans sortir pour autant du domaine de protection de l'invention.Of course, the invention is not limited to the embodiment described and shown in the accompanying drawing. Modifications remain possible, in particular from the point of view of the constitution of the various elements or by substitution of technical equivalents, without thereby departing from the scope of protection of the invention.
Claims (9)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8710098 | 1987-07-10 | ||
| FR8710098A FR2621772A1 (en) | 1987-07-10 | 1987-07-10 | ELECTRICAL HEATING DEVICE TRANSFORMING LIGHT ENERGY INTO CALORIFIC ENERGY |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0300938A1 true EP0300938A1 (en) | 1989-01-25 |
Family
ID=9353235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP88440059A Withdrawn EP0300938A1 (en) | 1987-07-10 | 1988-07-11 | Electrical heating device |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0300938A1 (en) |
| FR (1) | FR2621772A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996035316A1 (en) * | 1995-05-05 | 1996-11-07 | Andyhill Design Oy | Electrical sauna stove |
| GB2349454A (en) * | 1999-03-26 | 2000-11-01 | Counterline Limited | Radiant heater for food display unit with infrared source and emitter plate |
| US7218847B2 (en) * | 2003-10-24 | 2007-05-15 | Ushio Denki Kabushiki Kasiha | Heating unit for heating a workpiece with light-absorbing heat conducting layer |
| EP2020196A1 (en) * | 2007-07-31 | 2009-02-04 | Josef Stieglmeier | Device for keeping food warm in a vending stand |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE521375A (en) * | ||||
| CH217192A (en) * | 1940-11-18 | 1941-10-15 | Norman Rene | Electric heater. |
| US2497676A (en) * | 1946-03-27 | 1950-02-14 | Ralph W Lashells | Infrared ray equipment |
| US3401256A (en) * | 1965-09-22 | 1968-09-10 | Gen Motors Corp | Invertible infrared surface heating unit |
| US3746835A (en) * | 1971-08-20 | 1973-07-17 | Y Yu | Electric bulb heated water bed system |
| FR2475801A1 (en) * | 1980-02-07 | 1981-08-14 | Radulescu Alexandru | Low temp. localised heating for e.g. chair - uses groups of filament lamps run at LV where they are not luminous |
| GB2137060A (en) * | 1983-03-25 | 1984-09-26 | Gen Electric | Radiant-Energy Heating and/or Cooking Apparatus |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2515659A (en) * | 1950-07-18 | Automobile engine warmer | ||
| FR927680A (en) * | 1946-03-09 | 1947-11-05 | Electric heater | |
| FR1305731A (en) * | 1961-10-25 | 1962-10-05 | Device for heating a mass of fluid or other application, and thermal apparatus provided with the present device or similar device | |
| FR1502839A (en) * | 1966-09-27 | 1967-11-24 | Heating appliance |
-
1987
- 1987-07-10 FR FR8710098A patent/FR2621772A1/en not_active Withdrawn
-
1988
- 1988-07-11 EP EP88440059A patent/EP0300938A1/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE521375A (en) * | ||||
| CH217192A (en) * | 1940-11-18 | 1941-10-15 | Norman Rene | Electric heater. |
| US2497676A (en) * | 1946-03-27 | 1950-02-14 | Ralph W Lashells | Infrared ray equipment |
| US3401256A (en) * | 1965-09-22 | 1968-09-10 | Gen Motors Corp | Invertible infrared surface heating unit |
| US3746835A (en) * | 1971-08-20 | 1973-07-17 | Y Yu | Electric bulb heated water bed system |
| FR2475801A1 (en) * | 1980-02-07 | 1981-08-14 | Radulescu Alexandru | Low temp. localised heating for e.g. chair - uses groups of filament lamps run at LV where they are not luminous |
| GB2137060A (en) * | 1983-03-25 | 1984-09-26 | Gen Electric | Radiant-Energy Heating and/or Cooking Apparatus |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996035316A1 (en) * | 1995-05-05 | 1996-11-07 | Andyhill Design Oy | Electrical sauna stove |
| GB2349454A (en) * | 1999-03-26 | 2000-11-01 | Counterline Limited | Radiant heater for food display unit with infrared source and emitter plate |
| US7218847B2 (en) * | 2003-10-24 | 2007-05-15 | Ushio Denki Kabushiki Kasiha | Heating unit for heating a workpiece with light-absorbing heat conducting layer |
| EP2020196A1 (en) * | 2007-07-31 | 2009-02-04 | Josef Stieglmeier | Device for keeping food warm in a vending stand |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2621772A1 (en) | 1989-04-14 |
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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 BE CH DE ES FR GB GR IT LI LU NL SE |
|
| 17P | Request for examination filed |
Effective date: 19890921 |
|
| 17Q | First examination report despatched |
Effective date: 19900104 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 19900515 |