• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to an induction cooking field device, with at least one capacitive sensor unit (10a; 10b). In order to more quickly recognize the objects placed on the cooking field device and detect its position during operation of the device, it is proposed that the sensor unit (10a; 10b) has at least one sensor surface (12a; 12b) with at least one conductive track (14a; 14b) open. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2619112A1
    申请号:ES201531880
    申请日:2015-12-22
    公开日:2017-06-23
    发明作者:José Ignacio ARTIGAS MAESTRE；Guillermo ARTO SÁNCHEZ；Tomás CABEZA GOZALO；Jorge Luis FALCO BOUDET；Pablo Jesús Hernández Blasco；Sergio Llorente Gil
    申请人:BSH Hausgeraete GmbH；BSH Electrodomesticos Espana SA；
    IPC主号:
    专利说明:

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    metal, preferably, at least partially ferromagnetic, eddy currents and / or magnetic inversion effects that are transformed into heat. The cooking field device has several sensor surfaces arranged side by side. Advantageously, the sensor unit has a sensor array formed by several sensor surfaces arranged regularly side by side, whose total surface corresponds roughly or exactly to the total surface of the cooking field plate. Advantageously, the sensor surfaces of the matrix have a compact packing. The sensor array is intended to recognize the position and / or shape of an object supported and / or placed on the cooking field plate. Preferably, the cooking field device is provided to heat a cooking battery supported at any point on the cooking field plate. In this way, it is possible to advantageously recognize the positioning position of the cooking battery on the cooking field plate. Likewise, an area of the cooking field plate in which heating should take place can advantageously be recognized. In this way, objects that are not cooking batteries, such as knives, ladles, etc., placed or supported by mistake, can be prevented from heating.
    Preferably, the cooking field device comprises at least one transport unit, which is intended to move the at least one induction coil approximately or exactly parallel to the cooking field plate. In each case at least one induction coil can be moved under at least a large part of all the cooking field plate points. However, as an alternative it is also conceived that under the cooking field plate an array of induction coils composed of several induction coils is arranged, which is provided for a possible heating of at least a large part of all the points of the cooking field plate. In this way, heating in any position of the cooking field plate can be advantageously carried out with a high degree of efficiency. In addition, this way, heating can be started advantageously very quickly after the installation of a cooking battery.
    It is proposed that the positioning position of the cooking battery on the cooking field plate be determined by the sensor unit. The sensor unit is intended to recognize the shape of an object supported and / or placed on the cooking field plate. Here, the local resolution reaches a minimum of 10 cm to 1 mm.
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    74a non-crossed plane surrounding the projection (Figure 3b). Hexagon 74a has two opposite non-convex angles in the area of the contact point 64a, and wraps each of the two circle sectors 50a with three sides in each case, where, in the area of the outer angles of the sectors of circle 50a, a convex angle of hexagon 74a is found in each case. Accordingly, the conductive track 14a forms an essential part of a first electrode surface 72a. When an object approaches, it can therefore be caused that the total capacity is modified in a safe way, and that such modification of the capacity is detectable.
    The sensor surface 12a has an additional open conductive track 22a, which is in a different potential with respect to the conductive track 14a in at least one operating state. In the present case, the additional conductive track 22a also follows a spiral progression, and is connected to an earthing via a contact point not shown. The additional conductive track 22a acts during a measurement of the capacity as a shield of the conductive track 14a. During such capacity measurement, the conductive track 14a is then at a different potential with respect to the ground potential. When observed in parallel to the normal surface of the at least one sensor surface 12a, the additional conductive track 22a surrounds the conductive track 14a largely or completely. The conductive track 14a and the additional conductive track 22a extend largely or completely in a common plane. The additional conductive track 22a has an annular conductive track section 52a, which surrounds the conductive track 14a largely or completely, and delimits the sensing surface 12a outward to a large or complete extent. The annular conductive track section 52a has an interruption 54a, so that the induction of eddy currents in the annular conductive track section 52a can be attenuated, for example, through alternating magnetic fields of a cooking field coil inductively. However, the interruption 54a is small compared to the diameter of the sensor surface 12a, so that the additional conductive track 22a can shield the conductive track 14a effectively against electromagnetic disturbances.
    In the present case, the maximum width of the additional conductive track 22a measures approximately 1 mm and, the maximum thickness of the additional conductive track 22a, approximately 100 µm. However, it is also conceived that the additional conductive track 22a has a different width, with essentially the same geometry in the other aspects. The width of the additional conductive track 22a could be, for example, 500 µm or 100 µm. It is also conceived that the
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    maximum thickness of the additional conductive track 22a differs from 100 µm. Thus, the maximum thickness of the additional conductive track 22a could be, for example, 50 µm or 10 µm. Accordingly, the cross section of the additional conductive track 22a may be adapted correspondingly to the total surface of the sensor surface 12a. In the present case, the additional conductive track 22a is made largely or entirely of copper. However, conductive tracks of other metals such as aluminum, brass, iron, stainless steel, magnesium, silver, gold, or different copper alloys are also conceived. Conductive tracks of a conductive polymer are also conceived as, for example, PEDOT: PSS, in particular, conductive tracks applied by means of a printing technique.
    The total projection surface of the conductive track 14a and the additional conductive track 22a on the sensor surface 12a in this case measures approximately 10% of the total surface of the sensor surface 12a. Therefore, the sensor surface 12a is formed in a considerable part by the conductive track 14a and by the additional conductive track 22a. The conductive track 14a and the additional conductive track 22a form in each case a considerable part of a flat electrode, thus making it possible to accurately detect the approach of an object. Thanks to the realization of the sensor surfaces 12a of the sensor array 56a, circular currents induced by an alternating magnetic field originating during the operation of the induction coil 60a can be avoided on the sensor surfaces 12a of the sensor array 56a. . Therefore, the positioning position of the cooking battery 26a can be detected without errors also during a heating of the cooking battery 26a. In addition, electrical losses are reduced and the degree of efficiency is increased.
    In Figure 4, another embodiment of the invention is shown. The following descriptions are essentially limited to the differences between the examples of embodiment, where, in relation to components, characteristics and functions that remain the same, reference can be made to the description of the example of embodiment of Figures 1 to 3. For the differentiation of In the embodiment examples, the letter "a" of the reference symbols of the embodiment example of Figures 1 to 3 has been replaced by the letter "b" in the reference symbols of the embodiment example of Figure 4. In relation to components indicated in the same way, in particular, as regards components with the same reference symbols, it is also possible to refer basically to the drawings and / or to the description of the embodiment of figures 1 to 3.
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    权利要求:
    Claims (1)
    [1]
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    同族专利:
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    ES2619112B1|2018-04-10|
    EP3185647A1|2017-06-28|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US5793929A|1993-02-15|1998-08-11|Strix Limited|Immersion heaters with heating elements in the form of printed circuit tracks|
    EP1161120A2|1997-02-17|2001-12-05|Strix Limited|Electric heaters|
    WO1999002080A1|1997-07-11|1999-01-21|Strix Limited|Liquid heating vessels and controls therefor|
    US20100096385A1|2008-10-21|2010-04-22|Whirlpool Corporation|Method for detecting the presence of a cooking vessel on an induction cooking hob and hob using such method|
    US20120085752A1|2009-03-24|2012-04-12|Freni Brembo S.P.A.|Induction Furnace and Infiltration Process|
    CA2796102A1|2010-04-13|2011-10-20|Inductoheat, Inc.|Induction heat treatment of an annular workpiece|
    DE102011088675A1|2011-12-15|2013-06-20|BSH Bosch und Siemens Hausgeräte GmbH|Hob plate use in induction hob, has electrical heating conductor fixed at outer surface of base plate, and positioning surface for positioning dishes, where outer surface is formed opposite to positioning surface|
    WO2014056785A1|2012-10-11|2014-04-17|Arcelik Anonim Sirketi|A wireless cooking appliance operated on an induction heating cooktop|
    DE3733108C1|1987-09-30|1989-02-23|Bosch Siemens Hausgeraete|Circuit arrangement for a pot recognition system with a pot recognition sensor|
    FR2669101A1|1990-11-09|1992-05-15|Europ Equip Menager|INDUCTION HEATED HOB.|
    DE19646826C5|1996-02-22|2008-10-16|AEG Hausgeräte GmbH|Device for measuring the temperature of hotplates|
    DE19643698C2|1996-05-11|2000-04-13|Aeg Hausgeraete Gmbh|Device for shielding conductor tracks of a hob used for capacitive measurements|
    DE102004059822B4|2004-12-03|2011-02-24|E.G.O. Elektro-Gerätebau GmbH|Method for operating an induction hob|
    ES2319031B1|2007-02-21|2010-02-03|Bsh Electrodomesticos España, S.A.|COOKING FIELD WITH A MOVABLE HEATING ELEMENT.|
    ES2376566B1|2009-10-13|2013-01-29|Bsh Electrodomésticos España, S.A.|COOKING FIELD WITH INDUCTIVE SENSORS.|
    ES2655712T3|2013-07-31|2018-02-21|BSH Hausgeräte GmbH|Cooking Field Device|
    DE102014200316A1|2014-01-10|2015-07-16|BSH Hausgeräte GmbH|Home appliance control device|EP3914862A1|2019-01-23|2021-12-01|GORENJE gospodinjski aparati, d.d.|Device for detecting cooking vessel characteristics and method for detecting cooking vessel characteristics|
    法律状态:
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    优先权:
    申请号 | 申请日 | 专利标题
    ES201531880A|ES2619112B1|2015-12-22|2015-12-22|Induction cooking field device with at least one capacitive sensor unit|ES201531880A| ES2619112B1|2015-12-22|2015-12-22|Induction cooking field device with at least one capacitive sensor unit|
    EP16200685.2A| EP3185647A1|2015-12-22|2016-11-25|Cooking hob device|
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