EP0843797A1 - Dispositif de chauffage electrique - Google Patents
Dispositif de chauffage electriqueInfo
- Publication number
- EP0843797A1 EP0843797A1 EP96928489A EP96928489A EP0843797A1 EP 0843797 A1 EP0843797 A1 EP 0843797A1 EP 96928489 A EP96928489 A EP 96928489A EP 96928489 A EP96928489 A EP 96928489A EP 0843797 A1 EP0843797 A1 EP 0843797A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heating
- electric heating
- heating device
- heating body
- 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- Withdrawn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 claims abstract description 79
- 238000005485 electric heating Methods 0.000 claims abstract description 34
- 230000002093 peripheral effect Effects 0.000 claims abstract description 10
- 239000011819 refractory material Substances 0.000 claims abstract description 10
- 238000009423 ventilation Methods 0.000 claims description 6
- 230000005855 radiation Effects 0.000 claims description 5
- 229910010293 ceramic material Inorganic materials 0.000 claims description 3
- 229910052571 earthenware Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 description 4
- 229910052573 porcelain Inorganic materials 0.000 description 3
- 238000013459 approach Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H3/00—Air heaters
- F24H3/002—Air heaters using electric energy supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C7/00—Stoves or ranges heated by electric energy
- F24C7/04—Stoves or ranges heated by electric energy with heat radiated directly from the heating element
- F24C7/043—Stoves
Definitions
- the invention relates to an electric heating device comprising a heating body made of a refractory material and incorporating at least one electric heating resistor.
- the present invention will find its application in the field of electric heating devices.
- a first inventive step in the context of the present invention consisted in seeking to combine, at the same time, performance and aesthetics which would correspond, in a way, to an approach going against the point of view usual of the skilled person in the technical field considered.
- the former have the principle of heating a room essentially by convection and, in this case, there is an electrical resistance extending in a substantially horizontal plane inside a covering, allowing vertical ventilation. .
- the devices operating according to this convection principle have no inertia during start-up and allow instant heating of a room. Likewise, they have almost no inertia on cooling, preventing continuous temperature maintenance, which results in frequent variations in ambient heat.
- armored resistors are generally used delivering a relatively high power, of the order of 4 to 5 W per cm 2 , the transfer of heat being favored by the presence of fins extending radially , around these resistances. In this regard, these fins, during temperature variations and under the effect of their expansion, produce a typical noise which is particularly annoying when such a device is placed in a bedroom.
- heating devices which have just been described and which operate almost exclusively by convection
- electric heating devices whose operating principle is based on conduction and / or radiation.
- Some of these heating devices combine the electrical heating resistance with a refractory material in order to raise the latter, in temperature allowing it to restore the calories accumulated by conduction and / or by radiation.
- heating devices unlike the heating devices described above, these have a very high inertia both during start-up and when the power supply is cut off. Indeed, the refractory material accumulates, initially, a certain quantity of calories which it restores, then, to the part through its exchange surface. If it is possible, through this, to keep a room at a constant temperature, this inertia represents a drawback when it comes to heating rooms quickly.
- Such heating devices are also very often accompanied by an unflattering aesthetic. Thus, they often take a parallelepiped shape, similar to conventional radiators, while their volume is strictly proportional to their heat storage capacity. In any case, these heating devices are, from the point of view of their appearance, very different from traditional heating bodies of the tiled stove type.
- Document FR-A-512,283 also discloses an electric heating device comprising, first of all, a rectangular sheet metal envelope, partially open on its front face. Inside this metal casing extend, vertically, porcelain tubular elements inside which are arranged, concentrically, porcelain candles around which an electrical resistance is wound.
- the porcelain tubular elements have openings through which fresh air penetrates to heat up in contact with the heating resistors. This heated air is then evacuated through the orifices of a perforated cap surmounting said tubular elements. Finally, the heated air regains the volume of the room by passing through openings in the upper part of the front face of the sheet metal envelope.
- the present invention proposes to remedy the aforementioned drawbacks, through a heating device using, as heating means, an electrical resistance and which combines the advantages of a heating device operating by convection with those of a device whose operation is based on the principle of conduction and / or radiation.
- the technical solution according to the invention also makes it possible to solve the problem of the aesthetics of these heating devices.
- the present invention further proposes to remedy the problem of the resistance of electrical resistances over time, but also that of noise or the functioning of this type of heating device.
- the invention relates to an electric heating device comprising a heating body made of a refractory material and incorporating at least one electric heating resistance, characterized in that:
- the heating body defines a heating enclosure closed in its upper and lower part and containing the electrical resistance (s);
- heating body comprises, at its peripheral wall, openings for transverse ventilation of the heating chamber.
- the heating body is made of ceramic material, in particular earthenware.
- FIG. 1 is a schematic representation in section of an electric heating device according to the invention.
- FIG. 2 is a schematic representation of an electrical resistance arranged in the enclosure delimited by the heating body
- FIG. 3 is a schematic representation of an embodiment of a heating device according to the invention.
- the present invention relates to an electric heating device 1 which is distinguished by a heating body 2, preferably made of a refractory material and, very particularly, of ceramic material, such as earthenware.
- this heating body 2 delimits a heating enclosure 3 and therefore includes a peripheral wall 4 of cylindrical or parallelepiped shape.
- This heating body 2 also includes a lower plate 5 and an upper plate 6. These advantageously close this heating chamber 3 in its upper part and in its lower part, thus avoiding vertical ventilation which would lead to heating exclusively by convection.
- this heating chamber 3 is arranged at least one electric heating resistor 7 which is, in reality, an armored resistance extending, preferably, along a vertical axis 8 inside the heating body 2.
- This or these electric resistors 7 are, in this case, devoid of heat exchange fins which are the source of an unpleasant operating noise from conventional electric heating devices.
- the vertical strands 7a, 7b described by the armored resistor adopt a regular distribution around the axis of vertical symmetry of the enclosure. heater 3.
- the present invention is not in any way limited to a shielded resistor 7 as it appears in FIGS. 1 and 2.
- it can adopt any other configuration, very particularly, for the purpose define more vertical strands 7a, 7b and thus increase the exchange surface.
- the applicable safety standards recommend a surface temperature not exceeding about 85 ° C to 90 ° C if one wishes to avoid any additional protective device.
- this or these electric heating resistors 7 can be associated with regulation means capable of cutting their operation, or even reducing their power in the event that this surface temperature, detected by an appropriate sensor should exceed a threshold value.
- this or these electric heating resistors 7 extend above a connection box 9 made integral with the lower plate 5.
- the latter advantageously comprises an opening 10 for the passage of an electrical connection cable.
- the convection heating obtained through such a device according to the invention results from transverse ventilation 11 of the heating chamber 3. More particularly, the peripheral wall 4 of the heating body 2 comprises openings 12, 12A arranged, substantially opposite, allowing transverse scanning of the heating resistor 7.
- the importance of this transverse scanning and, consequently, the total section of the openings 12, 12A formed in the peripheral wall 4 of the heating body 2 is determined in such a way that the calories dispensed by the resistance (s) heating elements 7 are, substantially half, accumulated by the refractory material constituting the heating body 2 for heating by .conduction and / or radiation, while the other half of these calories occurs in the context of convection heating.
- the heating body 2 is of parallelepipedic section, two of its vertical sides 13, 14, being located, substantially, opposite, have such openings 12, 12A.
- FIG. 3 a heating device is illustrated, the heating body of which is of substantially square section, has, on each of its sides, openings 12, 12A.
- these openings 12, 12A are preferably arranged diametrically opposite.
- the present invention responds, in an advantageous manner, to an obvious request from the users of the electric heating devices and therefore represents clear progress in the technical field under consideration.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Electric Stoves And Ranges (AREA)
- Resistance Heating (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9509860 | 1995-08-11 | ||
| FR9509860A FR2737769B1 (fr) | 1995-08-11 | 1995-08-11 | Dispositif de chauffage electrique |
| PCT/FR1996/001259 WO1997007365A1 (fr) | 1995-08-11 | 1996-08-07 | Dispositif de chauffage electrique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0843797A1 true EP0843797A1 (fr) | 1998-05-27 |
Family
ID=9481954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96928489A Withdrawn EP0843797A1 (fr) | 1995-08-11 | 1996-08-07 | Dispositif de chauffage electrique |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0843797A1 (fr) |
| AU (1) | AU6823596A (fr) |
| CA (1) | CA2228716A1 (fr) |
| FR (1) | FR2737769B1 (fr) |
| WO (1) | WO1997007365A1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1317215B1 (it) * | 2000-04-11 | 2003-05-27 | Ernesto Marelli | Stufa elettrica con circuiti scaldanti a potenza limitata |
| ITUB20159184A1 (it) | 2015-12-23 | 2017-06-23 | Diego Brocchetto | Procedimento per la realizzazione di stufe elettriche di tipo tirolese traslabili |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR512283A (fr) * | 1920-03-23 | 1921-01-19 | Emile Steurs | Appareil de chauffage par l'électricité |
| US3654431A (en) * | 1970-08-19 | 1972-04-04 | Sylvania Electric Prod | Bunsen burner simulating flameless electric heater |
| FR2512310A1 (fr) * | 1981-09-01 | 1983-03-04 | Rag All Spa | Element modulaire a resistance, destine a la formation de panneaux rayonnants, chaudieres et similaires |
-
1995
- 1995-08-11 FR FR9509860A patent/FR2737769B1/fr not_active Expired - Fee Related
-
1996
- 1996-08-07 WO PCT/FR1996/001259 patent/WO1997007365A1/fr not_active Ceased
- 1996-08-07 EP EP96928489A patent/EP0843797A1/fr not_active Withdrawn
- 1996-08-07 AU AU68235/96A patent/AU6823596A/en not_active Abandoned
- 1996-08-07 CA CA 2228716 patent/CA2228716A1/fr not_active Abandoned
Non-Patent Citations (1)
| Title |
|---|
| See references of WO9707365A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| AU6823596A (en) | 1997-03-12 |
| FR2737769A1 (fr) | 1997-02-14 |
| FR2737769B1 (fr) | 1997-10-03 |
| CA2228716A1 (fr) | 1997-02-27 |
| WO1997007365A1 (fr) | 1997-02-27 |
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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 |
|
| 17P | Request for examination filed |
Effective date: 19980127 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE DE DK FI GB NL SE |
|
| 17Q | First examination report despatched |
Effective date: 19981023 |
|
| GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
| GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
| GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
| 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: 20000104 |