EP1696705B1 - Großflächiges Heizelement geringer Dicke, insbesondere Garofenheizelement - Google Patents

Großflächiges Heizelement geringer Dicke, insbesondere Garofenheizelement Download PDF

Info

Publication number: EP1696705B1
Authority: EP; European Patent Office
Prior art keywords: layers; layer; heating element; surface area; large surface
Prior art date: 2005-02-26
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.): Not-in-force

Application number

EP20050025515

Other languages

German (de)

English (en)

French (fr)

Other versions

EP1696705A1 (de

Inventor

Helga Steinbrück

Richard Wiesinger

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.)

Electrolux Home Products Corp NV

Original Assignee

Electrolux Home Products Corp NV

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.)

2005-02-26

Filing date

2005-11-23

Publication date

2008-02-13

2005-11-23 Application filed by Electrolux Home Products Corp NV filed Critical Electrolux Home Products Corp NV

2006-08-30 Publication of EP1696705A1 publication Critical patent/EP1696705A1/de

2008-02-13 Application granted granted Critical

2008-02-13 Publication of EP1696705B1 publication Critical patent/EP1696705B1/de

Status Not-in-force legal-status Critical Current

2025-11-23 Anticipated expiration legal-status Critical

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Classifications

- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
- H05B3/22—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible
- H05B3/26—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor mounted on insulating base
- H05B3/262—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor mounted on insulating base the insulating base being an insulated metal plate

Definitions

the invention relates to a large-area heating element of small thickness, in particular a Garofenheizelement.
a Garofenheizelement which has a substrate made of steel, which has on one side a layer of dielectric enamel, which in turn carries a heating layer, and may be provided on the other side with a different insulating layer.
a disadvantage of this is on the one hand, the relatively low isolation and, secondly, the relatively low dimensional stability during the baking of the layers, which in particular has a low substrate thickness.
the invention is therefore an object of the invention to provide a large-scale heating element of small thickness that high demands complies with the insulation and remains dimensionally stable at least when baking the layers.
the dielectric first layers of the first pair serve both for electrical insulation and to ensure dimensional stability during firing
the second layers of the second pair provide additional electrical insulation
the third layers of the second pair provide additional dimensional stability while the overall thickness of the heating element is small branding.
the substrate may be made of steel, in particular of enamellable steel, preferably of low-carbon steel. In particular, it has a thickness of at least 0.5 mm, in particular of at least 0.8 mm, preferably of at least 1 mm. Of course, larger thicknesses, for example, 1.5 mm are possible.
Bonding layers in particular nickel layers, may be arranged between the substrate and the dielectric first layers.
the dielectric first layers of the at least one first pair are in particular arranged mirror-symmetrically to one another, wherein they preferably completely cover both outer surfaces of the substrate.
the dielectric first layers of the at least one first pair have in particular the same coefficient of expansion and / or the same thickness, in particular a thickness in the range from 30 ⁇ m to 70 ⁇ m, preferably from 30 ⁇ m to 50 ⁇ m. They are preferably made of the same material, in particular of dielectric enamel. They are too preferably baked simultaneously under the same conditions. Finally, in particular, only a first pair of dielectric first layers is provided.
the second and the third layer of the at least one second pair can likewise be arranged mirror-symmetrically with respect to one another and in particular completely cover both outer surfaces of the dielectric first layers.
the dielectric second layer of the at least one second pair is preferably made of dielectric enamel, the third layer of the at least second pair in particular of conventional enamel, in particular black enamel.
At least two second pairs are preferably provided, the second layers lying on top of each other and the third layers lying on top of each other.
the second layers have, in particular, a thickness in the range of 120 ⁇ m to 180 ⁇ m, preferably 120 ⁇ m to 150 ⁇ m
the third layers in particular a thickness in the range of 120 ⁇ m to 180 ⁇ m, preferably 140 ⁇ m to 160 ⁇ m.
the second dielectric layer and the third layer of a second pair may be baked simultaneously under the same conditions.
the heating fourth layer is preferably made of a resistance material, in particular of silver. It preferably has a thickness of 7 .mu.m to 10 .mu.m.
a protective fifth layer is provided on it, which in particular has a thickness of 20 ⁇ m to 30 ⁇ m, preferably of approximately 20 ⁇ m.
the first and / or second and / or third and / or fourth and / or fifth layers are preferably printed.
the large-area heating element has in particular dimensions between 100 mm ⁇ 100 mm and 700 mm ⁇ 700 mm, preferably between 300 mm ⁇ 300 mm and 500 mm and 500 mm.
the application and drying is done in particular page by page.
the base is a preferably flat rectangular sheet 1 of low carbon steel having a thickness in the range of 0.5 to 1.5 mm, preferably about 1 mm, and an area in the range of 100 mm x 100 mm to 700 mm x 700 mm, for example, 500 x 500 mm.
On both sides of this sheet can be a Haftverstärkungs- or primer layer of 1 g / m 2 nickel, not shown, to better absorb the subsequent layers 2 on both sides of the sheet can.
each of the two individual layers 2 consists in particular of dielectric enamel having a thickness in the range of about 30 microns to 50 microns, wherein the first layer 2 printed on a first page and dried and the second layer 2 printed after page change on the other side and dried and then both layers 2 are baked together.
the printing takes place in particular by means of screen printing, the simultaneous baking at temperatures in the range of 780 ° C to 835 ° C, preferably at 800 ° C.
the crucial basis is created that the sheet 1 during firing not only the layers 2, but also all subsequent layers (due to different thermal expansion coefficients) does not warp, not from its original flat shape differs.
these mutually identical layers 2 may also consist of other dielectric material. It is crucial that at least the layers 2 the same baking temperatures and after baking the same thicknesses so that they can be baked at the same time in a baking process.
one of the layers here one of the layers of the same material forming the total layer 3 consists of conventional black enamel
the other layer here one of the layers of the same material forming the total layer 4 consists of dielectric enamel.
Layers of the same material are thus always on top of each other, in this case three layers of dielectric enamel on one side of the sheet 1 and three layers of black enamel on the other side of the sheet 1.
the production of the layers 3 and 4 is based on the production of the layers 2, in which case the first layer of the total layer 3 printed on a first page and dried and the first layer of the total layer 4 is printed after side change on the other side and dried and Subsequently, both layers are baked together, followed in the same way followed by printing, drying and baking of the other layers of the total layers 3 and 4, so that this is repeated three times in total layers formed from three layers.
the printing is again carried out by screen printing, the simultaneous baking again at temperatures in the range of 780 ° C to 835 ° C.
the thickness of the total layer 3 of black enamel is in the range of 140 microns to 160 microns, the thickness of the total layer 4 of dielectric enamel in the range of 120 microns to 160 microns. Among other things, the thickness depends on the consistency of the enamel paste to be printed and the mesh size of the screen.
a resistance heating layer 5 of, in particular, silver is applied, which may have all the geometries customary for film heaters, for example annular, meandering or even full-surface geometries.
the printing is done by screen printing, while the baking takes place at temperatures of about 635 ° C.
the thickness is in the range of 7 microns to 10 microns.
the lovedsteiltik 5 may be covered with a scratch-resistant protective layer 6, which is printed by screen printing and fired at temperatures in the range of 600 ° C to 630 ° C. Its thickness is about 20 microns.
Such a layer structure contributes to a large-area heating element H of small thickness, which meets the electrical safety requirements of IEC 60335-2 for stationary heating elements of the class I.

EP20050025515 2005-02-26 2005-11-23 Großflächiges Heizelement geringer Dicke, insbesondere Garofenheizelement Not-in-force EP1696705B1 (de)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE200510008903 DE102005008903A1 (de)	2005-02-26	2005-02-26	Großflächiges Heizelement geringer Dicke, insbesondere Garofenheizelement

Publications (2)

Publication Number	Publication Date
EP1696705A1 EP1696705A1 (de)	2006-08-30
EP1696705B1 true EP1696705B1 (de)	2008-02-13

Family

ID=36218307

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP20050025515 Not-in-force EP1696705B1 (de)	2005-02-26	2005-11-23	Großflächiges Heizelement geringer Dicke, insbesondere Garofenheizelement

Country Status (2)

Country	Link
EP (1)	EP1696705B1 (zh)
DE (2)	DE102005008903A1 (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE102008010343A1 (de) *	2008-02-14	2009-01-02	E.G.O. Elektro-Gerätebau GmbH	Heizeinrichtung zur Erhitzung von Wasser
BE1019697A3 (nl) *	2010-12-10	2012-10-02	Polyvision N V	Verwarmingselement.
GB2576895B (en) *	2018-09-05	2021-02-17	Ferro Tech Bv	Thick film resistor

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE1146991B (de) *	1959-04-13	1963-04-11	Therm O Lab Corp	Elektrisches Heizelement
US3694627A (en) *	1970-12-23	1972-09-26	Whirlpool Co	Heating element & method of making
DE3536268A1 (de) *	1985-10-11	1987-04-16	Bayer Ag	Flaechenheizelemente
IT1218221B (it) *	1988-04-15	1990-04-12	Bayer Ag	Sistemi di riscaldamento ad alta temperatura e metodo per produrli
DE69022830T2 (de) *	1989-07-19	1996-03-14	Kawasaki Steel Co	Verfahren zur herstellung von stahlblechen zur emaillierung mit verbesserter emailhaftung.
US5932128A (en) *	1997-02-26	1999-08-03	White Consolidated Industries, Inc.	Switching control system for heating panel with leakage current cancellation
FR2803481B1 (fr) *	1999-10-07	2002-09-13	Acso Agence Commerciale Second	Appareil de chauffage par rayonnement
US6225608B1 (en) *	1999-11-30	2001-05-01	White Consolidated Industries, Inc.	Circular film heater

2005
- 2005-02-26 DE DE200510008903 patent/DE102005008903A1/de not_active Withdrawn
- 2005-11-23 DE DE200550002826 patent/DE502005002826D1/de active Active
- 2005-11-23 EP EP20050025515 patent/EP1696705B1/de not_active Not-in-force

Also Published As

Publication number	Publication date
DE102005008903A1 (de)	2006-08-31
DE502005002826D1 (de)	2008-03-27
EP1696705A1 (de)	2006-08-30

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