EP2779784A1 - Heizplatte - Google Patents

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Publication number
EP2779784A1
EP2779784A1 EP13159228.9A EP13159228A EP2779784A1 EP 2779784 A1 EP2779784 A1 EP 2779784A1 EP 13159228 A EP13159228 A EP 13159228A EP 2779784 A1 EP2779784 A1 EP 2779784A1
Authority
EP
European Patent Office
Prior art keywords
electrically
conductive
generating circuit
heat
heating plate
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Withdrawn
Application number
EP13159228.9A
Other languages
English (en)
French (fr)
Inventor
Shui-Po Lee
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to EP13159228.9A priority Critical patent/EP2779784A1/de
Publication of EP2779784A1 publication Critical patent/EP2779784A1/de
Withdrawn legal-status Critical Current

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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
    • H05B3/28—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor embedded in insulating material
    • 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
    • H05B3/84—Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields
    • H05B3/86—Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields the heating conductors being embedded in the transparent or reflecting material
    • 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
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/002—Heaters using a particular layout for the resistive material or resistive elements
    • H05B2203/003—Heaters using a particular layout for the resistive material or resistive elements using serpentine layout
    • 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
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/016—Heaters using particular connecting means

Definitions

  • the present invention relates to heating plates, and more particularly, to a heating plate that provides benefits of fast heating response, strong structural integrity, high mechanical strength and excellent resistant to thermal shock and high temperature embrittlement.
  • the conventional boilers or steam pipes typically use electric heating devices such as metal heating rods, heating wire and metal heating foil to heat liquid (such as water and oil), and these heating devices are mostly made of electrothermal alloy.
  • Taiwan Patent M364834 is a U-shaped heating device that generates heat when electric power is applied to its ends. Such a heating rod responds slowly and is disadvantageous when the application needs fast heating. Furthermore, for compensate for said slow response, the conventional heating devices made of electrothermal alloy have to directly contact the liquid to be heated (e.g. water) so as to improve the resultant heat exchange. However, direct exposure to liquid can cause metal parts in the device to oxidize prematurely, with the service life no longer than 3000 hours.
  • liquid to be heated e.g. water
  • the conventional heating wires and metal heating foil due to their thin structure, typically lack of strength and tend to suffer high temperature embrittlement. In the case where such a device is excessively heavy, or is not well installed or supported, the embrittled parts can deform and cause the whole structure to collapse. Additionally, for maximizing heating efficiency in a given area, the heating wires and metal heating foil are usually arranged into a coil-like or continuous S-shaped patter. However, the electric current flowing across the device tends to concentrates at the turning corners along the path and makes the turning points excessively heat. Without being widened or thickened at the turning points, the electrothermal-alloy heating wire or the heating foil can easily be burned out, resulting in either a disadvantageously restricted current carrying ability or reduced service life of the overall heating device.
  • a heating plate comprises:
  • One objective of the present invention is to provide a heating plate wherein the electrically-conductive heat-generating circuit and the outer electrically-insulating layer are closely combined on the main board.
  • the functional layers are bound to the main board firmly, the whole assembly has the benefits of strong structural integrity and excellent resistant to vibration and thermal shock.
  • the electrically-conductive heat-generating circuit is well supported by the main board, so the heat generated during the heating process can be conducted to the main board quickly, without the risk of high temperature embrittlement as occurring in electrothermal-alloy devices and the risk of deformation or collapse caused by weak support or improper installation.
  • Another objective of the present invention is to provide a heating plate wherein the first electrically-conductive layer is arranged on the external surface of the main board in a first direction while the second electrically-conductive layer is arranged on the external surface of the main board in a second direction, in which the first and second directions are orthogonal to each other, so that the first electrically-conductive layer and the second electrically-conductive layer form overlapping areas at the turning points where they contact each other.
  • the overlapping areas help to promote the current carrying ability of the electrically-conductive heat-generating circuit and prevent the turning point from failure.
  • Another objective of the present invention is to provide a heating plate wherein the electrically-conductive heat-generating circuit further has at least one rounded corner at the turning points for preventing electric current flowing along the circuit from concentrating at and burning out the turning points.
  • a heating plate comprises a main board 1, an electrically-conductive heat-generating circuit 30 and an outer electrically-insulating layer 40.
  • the main board 1 may be made of a material that is thermally conductive and electrically insulating.
  • the main board 1 is a glass board.
  • the main board 1, as shown in Figure 2 is composed of a thermally-conductive board 10 and a thermally-conductive electrically-insulating layer 20 deposited on the top of the thermally-conductive board 10.
  • the thermally-conductive board 10 may be at least one of a stainless steel board, a metal board and a sintered metal board, and the thermally-conductive electrically-insulating layer 20 is a glass glaze layer.
  • the main board 1 may be fixed to the exterior of a boiler or a liquid container by means of, for example, screwing, embedding or soldering.
  • the electrically-conductive heat-generating circuit 30 is deposited on the external surface of the thermally-conductive electrically-insulating layer 20, and is composed of at least one first electrically-conductive layer 31 and at least one second electrically-conductive layer 32. Where the first and second electrically-conductive layers 31, 32 joint are formed with overlapping areas 33 that are constructed from the stacked first and second electrically-conductive layers 31, 32 (as shown in Figure 4 ).
  • the electrically-conductive heat-generating circuit 30 has at least two electrically-conductive segment 34.
  • the outer electrically-insulating layer 40 is deposited on the external surface of the electrically-conductive heat-generating circuit 30, for sandwiching the electrically-conductive heat-generating circuit 30 between the thermally-conductive electrically-insulating layer 20 and the outer electrically-insulating layer 40.
  • the outer electrically-insulating layer 40 may be a layer of glass glaze.
  • the electrically-conductive segment 34 is at least partially exposed outside the outer electrically-insulating layer 40, for an electrically-conductive member 35 to connect thereto (as shown in Figure 5 ).
  • the main board 1 is a rectangular board having a pair of first edges 11 and a pair of second edges 12.
  • the first electrically-conductive layer 31 is arranged on the external surface of the thermally-conductive electrically-insulating layer 20 in a first direction a
  • the second electrically-conductive layer 32 is arranged on the external surface of the thermally-conductive electrically-insulating layer 20 in a second direction b.
  • the first direction a is parallel to the first edges 11, and the second direction b is parallel to the second edges 12, so that the first and second directions a, b are orthogonal to each other.
  • the first and second electrically-conductive layers 31, 32 jointly form the electrically-conductive heat-generating circuit 30 with a continuous S-shaped pattern.
  • the electrically-conductive heat-generating circuit 30 has at least one rounded corner 36 at its turning points.
  • the thermally-conductive electrically-insulating layer 20, the electrically-conductive heat-generating circuit 30 and the outer electrically-insulating layer 40 may be successively formed on the thermally-conductive board 10 through a vacuum screen-printing process and baked respectively, so as to firmly bounded with the thermally-conductive board 10.
  • the resistance of the electrically-conductive heat-generating circuit 30 converts the current into heat. Then the heat generated by the electrically-conductive heat-generating circuit 30 is transmitted to the main board 1 through the thermally-conductive electrically-insulating layer 20, for the main board 1 to heat any article to be heated.
  • the disclosed heating plate thus has the advantages of quick heating response and fast actuation of the electrically-conductive heat-generating circuit 30.
  • the heating rate at the surface of the heat-generating circuit is up to 250 ⁇ 300°C/s, being superior to the traditional electrothermal-alloy devices.
  • the thermally-conductive electrically-insulating layer 20, the electrically-conductive heat-generating circuit 30 and the outer electrically-insulating layer 40 are closely affixed to the main board 1, so the strong binding between the main board 1 and the functional layers provides the benefits of high mechanical strength and excellent resistant to vibration and thermal shock.
  • the electrically-conductive heat-generating circuit 30 is well supported by the main board 1, so the heat generated during the heating process can be conducted to the main board 1 quickly, without the risk of high temperature embrittlement as occurring in electrothermal-alloy devices and the risk of deformation or collapse caused by weak support or improper installation.
  • the disclosed main board 1 may be further fixed to the exterior of a boiler or a liquid container by means of, for example, screwing, embedding or soldering. Accordingly, the heating plate is isolated from the liquid to be heated, and less likely to oxidize, thereby having long service life.
  • the electrically-conductive heat-generating circuit 30 is sandwiched between the main board 1 and the outer electrically-insulating layer 40, it is relatively isolated from the atmosphere and can have its service life lengthened to more than then thousand hours.
  • the first electrically-conductive layer 31 and the second electrically-conductive layer 32 jointly form the electrically-conductive heat-generating circuit 30 that has a continuous S-shaped pattern, and has every point where the circuit veers formed with the thickened overlapping area 33, so as to effectively prevent the turning points from being burned out by concentrated current, thereby providing the electrically-conductive heat-generating circuit 30 with increased current carrying ability.
  • the electrically-conductive heat-generating circuit 30 may have its turning points formed as rounded corners 36, which can help reduce current concentration at the turning points as compared to traditional right-angle corners.

Landscapes

  • Surface Heating Bodies (AREA)
EP13159228.9A 2013-03-14 2013-03-14 Heizplatte Withdrawn EP2779784A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13159228.9A EP2779784A1 (de) 2013-03-14 2013-03-14 Heizplatte

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13159228.9A EP2779784A1 (de) 2013-03-14 2013-03-14 Heizplatte

Publications (1)

Publication Number Publication Date
EP2779784A1 true EP2779784A1 (de) 2014-09-17

Family

ID=47900806

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13159228.9A Withdrawn EP2779784A1 (de) 2013-03-14 2013-03-14 Heizplatte

Country Status (1)

Country Link
EP (1) EP2779784A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019197648A1 (de) * 2018-04-13 2019-10-17 Webasto SE Elektrische heizeinrichtung für mobile anwendungen
WO2021078724A1 (de) * 2019-10-22 2021-04-29 Webasto SE Elektrische heizeinrichtung, insbesondere für mobile anwendungen

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4659906A (en) 1984-01-20 1987-04-21 Vitronics Corporation Infrared panel emitter and method of producing the same
DE10130511A1 (de) 2001-06-25 2003-01-16 Bleckmann Gmbh Lamprechtshause Flachheizprofil für direkte Mediumbeheizung
AT7326U1 (de) 2003-12-04 2005-01-25 Econ Exp & Consulting Group Gm Verfahren zur herstellung eines flächenheizelementes und danach hergestelltes flächenheizelement
TWM364834U (en) 2009-05-15 2009-09-11 Beauty Silks Co Ltd Improved structure of heater for water heater
EP2461644A1 (de) 2010-12-02 2012-06-06 Ube Industries, Ltd. Flexibler Heizer und Herstellungsverfahren dafür

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4659906A (en) 1984-01-20 1987-04-21 Vitronics Corporation Infrared panel emitter and method of producing the same
DE10130511A1 (de) 2001-06-25 2003-01-16 Bleckmann Gmbh Lamprechtshause Flachheizprofil für direkte Mediumbeheizung
AT7326U1 (de) 2003-12-04 2005-01-25 Econ Exp & Consulting Group Gm Verfahren zur herstellung eines flächenheizelementes und danach hergestelltes flächenheizelement
TWM364834U (en) 2009-05-15 2009-09-11 Beauty Silks Co Ltd Improved structure of heater for water heater
EP2461644A1 (de) 2010-12-02 2012-06-06 Ube Industries, Ltd. Flexibler Heizer und Herstellungsverfahren dafür

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019197648A1 (de) * 2018-04-13 2019-10-17 Webasto SE Elektrische heizeinrichtung für mobile anwendungen
WO2021078724A1 (de) * 2019-10-22 2021-04-29 Webasto SE Elektrische heizeinrichtung, insbesondere für mobile anwendungen
CN114600554A (zh) * 2019-10-22 2022-06-07 韦巴斯托股份公司 电加热装置、特别是用于移动应用的电加热装置

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