EP2397774A1 - Hotplate device - Google Patents

Abstract

The device has covering elements (12) forming main surfaces (14) in cooking zones (10). A setting unit (16) forms a portion of the cooking zones, and comprises sub-areas (18), which protrude out over the main surfaces in operating condition. The sub-areas of the setting unit exhibit increased temperature load than that of sub-areas of the covering elements, which form a portion of the main surfaces. The main surfaces are made of hard-glass, iolite, mullite, silicon nitride and/or composite material with a ceramic matrix. An independent claim is also included for a method for manufacturing a hob device.

Description

From the publication CN 2934963-Y a device is known with a temperature sensor which is intended to measure a temperature of a set up cookware. The cookware is placed over a large area on a heating area of the device.

The object of the invention is in particular to provide a generic device with improved properties in terms of high efficiency. The object is achieved by the features of claim 1, while advantageous embodiments and modifications of the invention can be taken from the dependent claims.

It is proposed a cooking surface device having at least one cooking zone, at least one cover member which forms a main surface of an entire surface of the cooking zone, and at least a first Aufstellinheit which forms part of the cooking zone and which has at least a partial area, which in at least one operating state over the main surface protrudes, wherein the portion has a higher temperature load capacity than at least a portion of the cover, which forms at least part of the main surface. A "cooking zone" is to be understood in particular as an area of a top surface of a hob, which is provided for setting up a single cookware element, wherein the hob device is intended to heat the cookware element, while it is placed on the cooking zone. By "intended" is intended to be understood in particular specifically designed and / or specially equipped. A "cover element" is to be understood in particular an element which covers at least one component which is arranged in an interior of the hob and which is in particular an electronic component, in at least one operating state. A "main surface" of an overall surface of the cooking zone is to be understood in particular as a partial surface of the total surface which has at least fifty percent, preferably at least seventy percent and particularly preferably at least ninety percent of the total surface area of the total surface. By a "Aufstelleinheit" is intended in particular a unit be understood, on which during at least one cooking process, a cookware used for the cooking process is placed, the cookware touches the unit. By a "subregion which projects beyond the main surface in at least one operating state" is to be understood, in particular, a subregion which is arranged higher in at least one operating state with respect to a vertical upward direction than each point of the main surface. By "a subregion of the erection unit having a higher temperature resistance than a subregion of the cover element", it should be understood in particular that in the case in which the subregion of the erection unit and the subregion of the cover element are uniformly heated from room temperature, the Part of the cover at a lower temperature cracks developed and / or becomes liquid and / or visibly changed its shape for an observer with the naked eye. With an embodiment according to the invention, a high efficiency can be achieved. In particular, a low cost and robust construction can be achieved. In particular, a cost-effective design of the cover can be achieved, wherein the cover remains intact, especially in cooking operations that are performed on a high-power cooking stage.

In particular, in cooking operations, a slight heating of the cover can be achieved, which can be achieved in particular that the cover during cooking processes a low heat to components which are arranged inside the hob dispenses.

Furthermore, it is proposed that the main surface is formed at least partially of hard glass and / or cordierite and / or mullite and / or silicon nitride and / or a composite material with a ceramic matrix. This allows a cost-effective design can be achieved.

Preferably, the first erection unit has at least one electronic component which projects beyond the main surface in the operating state and / or is arranged in the operating state at least partially in an upper third of the cover element. A "component which projects beyond the main surface in at least one operating state" is to be understood in particular as meaning a component which has at least one partial region which, in at least one operating state, relates to a vertical upward direction is arranged higher than any point of the main surface. Under the fact that a component is arranged in the operating state at least partially "in an upper third" of the cover, should be understood in particular that the component has at least a portion which lies in a plane which intersects the cover in a cutting area, said Section completely surrounds the partial region of the component and wherein the component is arranged in the operating state at least partially over a plane having a normal direction which extends vertically and which extends through a maximum vertical extension length of the cover member, which extends vertically, that two-thirds the maximum vertical extension length are arranged below the latter level. This allows precise operation to be achieved. In particular, it can be achieved that an amount of heat of a set up on the Aufstellinheit cookware is quickly transferred to the electronic component, whereby an operation of the electronic component is influenced quickly by a heat quantity of the cookware. In particular, excessive heating, in particular heating to over 270 ° C., cooking utensils heated by the hob device and forgotten by a user, and thereby high stress on this cookware, can be avoided, and furthermore an outbreak of a fire can be avoided.

In a preferred embodiment of the invention, the first erection unit is a single assembly unit and has at least two sensor elements. A "single assembly unit" is to be understood in particular a unit which is intended to be moved as a unit in a mounting position, and which preferably has only components which are fixed so that the components are immobile in pairs relative to each other. A "sensor element" is to be understood as meaning, in particular, an element which, in at least one operating process, participates in a quantitative detection of a parameter by means of at least one of its physical properties. In this way, a precise measurement can be achieved.

Furthermore, it is proposed that the first erection unit has at least one first set-up surface, which is formed at least partially from copper and / or aluminum. A "footprint" is to be understood in particular a surface which is provided for setting up and supporting cookware, wherein the surface has direct contact with the cookware. As a result, a cost-effective and robust construction can be achieved.

In addition, it is proposed that the first erection unit has at least one sensor element and the hob device has at least one second erection unit which has at least one sensor element. By the fact that a "second erection unit is provided" is to be understood in particular that the hob apparatus in addition to the first Aufstelleinheit has a second Aufstelleinheit and the two Aufstelleinheiten are formed separately from each other. As a result, a particularly reliable sensing can be achieved. In particular, in the case in which the cooktop device has four set-up units formed separately from one another, it can be achieved that a cookware applied to the cooking zone always has direct contact with an erection unit, which has a sensor element.

It is also proposed that the hob device has at least four erection units, which each form part of the total surface of the cooking zone. By the fact that the hob device "comprises three further erector units", should be understood in particular that the hob device in addition to the first Aufstelleinheit has three further Aufstelleinheiten, wherein the four Aufstelleinheiten are formed in pairs separately. As a result, a reliable support of a cookware can be achieved.

Preferably, the first erection unit has a main extension direction which is radial with respect to a center of the cooking zone with respect to a plan view of the cooking zone. This allows a high degree of flexibility can be achieved. In particular, it can be achieved that both small and large pots are centered on the cooking zone and supported by the Aufstelleinheit.

It is also proposed that the cooktop device has a first and at least one second group of set-up units, which are arranged substantially concentrically. In particular, at least two and preferably at least three set-up units, which are preferably designed separately from one another, are to be understood as a "group of set-up units". Under that a first and a second group of Aufstelleinheiten "substantially concentric" are arranged, should In particular, it should be understood that centers of masses of the first group of erection units are spaced apart by at most five centimeters, preferably at most two centimeters and more preferably at most four millimeters, preferably with a minimum distance of the first group of erection units from an edge of the cooking zone from a minimum distance of the second set of Aufstelleinheiten different from the edge of the cooking zone. This allows a high degree of flexibility can be achieved. In particular, it can be achieved that stand in an operating state large pots on both groups of Aufstelleinheiten and small pots only on one of the two Aufstelleinheiten.

It is also proposed that the cooking zone has a shape of a circular area with respect to a plan view of the cooking zone, and that the first setting unit is secant-like or chord-like with respect to the circular area. This allows a cost-effective design can be achieved together with a high degree of flexibility.

The hob device preferably has at least one thermopile and / or an infrared temperature measuring element which is provided for measuring a temperature of a cookware arranged on the cooking zone. Thereby, a contactless temperature measurability can be achieved.

Furthermore, a production method for producing a cooktop device is proposed in which at least one first set-up unit which forms part of a cooking zone and which has at least one partial area which projects beyond a main surface of the cooking zone in at least one operating state and which has a higher temperature load capacity than at least one Part of the main surface, is attached to a cover, which forms the main surface. As a result, a high efficiency can be achieved.

Further advantages emerge from the following description of the drawing. In the drawings, embodiments of the invention are shown. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.

Fig. 1

eine Draufsicht auf ein Kochfeld mit einer erfindungsgemäßen Kochfeldvorrichtung,

Fig. 2

einen II-II-Teilschnitt durch einen Bereich der Kochfeldvorrichtung, welcher eine Kochzone bildet, wobei ein Kochgeschirr auf die Kochzone aufgestellt ist,

Fig. 3

eine Draufsicht auf ein alternatives Ausführungsbeispiel eines Teils einer Kochfeldvorrichtung,

Fig. 4

eine Draufsicht auf ein alternatives Ausführungsbeispiel eines Teils einer Kochfeldvorrichtung, wobei eine Aufstelleinheit sekantenartig verläuft,

Fig. 5

eine Draufsicht auf ein alternatives Ausführungsbeispiel eines Teils einer Kochfeldvorrichtung, wobei drei Aufstelleinheiten vorgesehen sind,

Fig. 6

eine Draufsicht auf ein alternatives Ausführungsbeispiel eines Teils einer Kochfeldvorrichtung, wobei zwei Aufstelleinheiten vorgesehen sind, welche in der Draufsicht vollständig innerhalb eines Umrisses einer Kochzone der Kochfeldvorrichtung angeordnet sind,

Fig. 7

ein VII-VII-Teilschnitt durch den Teil der Kochfeldvorrichtung und

Fig. 8

ein VIII-VIII-Teilschnitt durch den Teil der Kochfeldvorrichtung.

Show it:

Fig. 1

a top view of a hob with a hob according to the invention,

Fig. 2

a II-II partial section through a portion of the hob device, which forms a cooking zone, with a cookware is placed on the cooking zone,

Fig. 3

a top view of an alternative embodiment of a portion of a hob device,

Fig. 4

a plan view of an alternative embodiment of a portion of a hob apparatus, wherein a Aufstelleinheit runs secant,

Fig. 5

a plan view of an alternative embodiment of a portion of a hob device, wherein three Aufstelleinheiten are provided,

Fig. 6

a plan view of an alternative embodiment of a portion of a hob device, wherein two Aufstelleinheiten are provided, which are arranged in the plan view completely within an outline of a cooking zone of the hob device,

Fig. 7

a VII-VII partial section through the part of the hob device and

Fig. 8

a VIII-VIII partial section through the part of the hob device.

FIG. 1 shows a plan view of a hob with a hob according to the invention, which has a plate-shaped cover member 12 and four Aufstelleinheiten 16, 30, 32, 34. The erection units 16, 30, 32, 34 are rod-shaped and arranged in rod-shaped recesses 42 of the cover 12 ( FIGS. 1 and 2 ). Surfaces of the cover 12 and the Aufstelleinheiten 16, 30, 32, 34, which are part of an upper surface 44 of the hob in an operating state, form a cooking zone 10, which with respect to a plan view of the hob ( FIG. 1 ) is circular. In this case, the cover 12 forms a main surface 14 of an overall surface from which the cooking zone 10 consists.

The erector unit 16 is fixed so as to be immovable relative to the cover member 12. The positioning unit 16 has an integral, rod-shaped element 48, which forms a portion 18, which in the operating state with respect to a vertical Direction 46 projects above the main surface 14 and which forms an upper side of the erection unit 16 ( FIG. 2 ). This top is a footprint 28, which is provided for setting up cookware 50 and which has 50 direct contact with the set up cookware. The portion 18 is formed of copper and has a higher temperature load capacity than the cover 12, which is formed of hard glass. In principle, the covering element 12 can also be formed from cordierite, mullite, silicon nitride, a glass with a low expansion coefficient and / or a composite material with a ceramic matrix. In addition, the partial region 18 can in principle also be formed from aluminum, steel, glass ceramic or iron. Each of the erection units 16, 30, 32, 34 protrudes beyond the main surface 14.

The first setting unit 16 is a single component and has a sensor element 24 which is an NTC resistor and which is a temperature sensor element for quantitatively detecting a temperature in a resistance thermometer (not shown). By means of the resistance thermometer, a temperature of the cookware 50 can be detected. The sensor element 24 is an electronic component 22, which protrudes in the operating state via an upper side of the cover element 12, which in the operating state has only horizontally extending surface extension directions, and thus beyond the main surface 14. The erection unit 16 has a main extension direction 36 which, with respect to a center 38 of the circular cooking zone 10, is in a top view (FIG. FIG. 1 ) extends radially to the cooking zone 10. Furthermore, the set-up units 30, 32, 34 also each have a main extension direction, which extends radially to the center 38. The erection unit 32 is identical in construction to the erection unit 16 and has, in particular, a sensor element 26.

The Aufstelleinheiten 30, 34 are free of electronic components. Alternatively or in addition to the sensor elements 24, 26, the cooktop device may comprise an infrared temperature measuring element 40 (FIG. FIG. 2 ), which is provided for measuring the temperature of the cookware 50. In principle, it is also conceivable that the hob device alternatively or additionally has temperature sensor elements based on a different functional principle.

In a production of the hob apparatus, the erection units 16, 30, 32, 34 can be manufactured by means of continuous casting or machining. Furthermore, the Aufstelleinheiten 16, 30, 32, 34 by welding or by means of rivets, which may have adhesive, or by pressing on the cover member 12 are fixed.

A heating element (not shown) of the hob device is arranged in the operating state below the cooking zone 10. In principle, it is conceivable that the electronic component 22 forms a surface of the setting-up unit 16 and the surface in the operating state is part of the upper side of the setting-up unit 16, which has direct contact with the cookware 50. Furthermore, in principle at least one of the erection units 16, 30, 32, 34 may be cylindrical. In addition, in principle, each setting-up unit 16, 30, 32, 34 can have a plurality of temperature sensor elements. Furthermore, the cooktop device may comprise a thermocouple and / or sensors based on magnetic properties for measuring a temperature of the cookware 50.

In the FIGS. 3 to 8 Alternative embodiments are shown. Substantially identical components, features and functions are basically numbered by the same reference numerals. To distinguish the embodiments, however, the reference numerals of the embodiments in the FIGS. 3 to 8 the letters "a", "b" etc. added. The following description is essentially limited to the differences from the embodiment in the FIGS. 1 and 2 , wherein with respect to the same components, features and functions on the description of the embodiment in the FIGS. 1 and 2 can be referenced.

FIG. 3 shows an alternative embodiment of a part of a hob device. The cooktop apparatus has two groups 52a, 54a of setting units 16a, 30a, 32a, 34a, 56a, which are arranged concentrically. The erection unit 56a projects beyond a main surface 14a of the cooking zone 10a. A cooking zone 10a of the hob device is circular. The first group 52a has the erection units 16a, 30a, 32a, 34a. Furthermore, the second group 54a has the set-up units 56a. A center of mass of the first group 52a and a center of mass of the second group 54a are identical to a center 38a of the cooking zone 10a. Furthermore, the set-up units 16a, 30a, 32a, 34a in a plan view of the cooking zone 10a corner points of a square.

FIG. 4 shows a further alternative embodiment of a part of a hob device. The hob device has two erection units 16b, 30b. A first of the Set-up units 16b is circular in a plan view of the hob apparatus. A cooking zone 10b, which is partially formed by the setting-up units 16b, 30b, is circular in plan view. A second of the erection units 30b extends in a secant manner with respect to the circular cooking zone 10b in plan view.

FIG. 5 shows a further alternative embodiment of a part of a hob device. The hob device has three erection units 16c, 30c, 32c, which are each circular in plan view of the hob apparatus and form vertices of a triangle. The triangle is equilateral.

FIG. 6 shows a further alternative embodiment of a part of a hob device. The hob apparatus has two erection units 16d, 30d, the tops of which form part of a circular cooking zone 10d of the hob apparatus. The erection unit 16d is rod-shaped. In a plan view of the hob apparatus, the setting unit 30d is circular. The erection unit 16d is arranged in plan view within an outline of the cooking zone 10d. Furthermore, the setting-up unit 16d is designed as an assembly unit and has three identically constructed sensor elements 24d, 26d, 58d designed as temperature sensor elements (FIG. FIG. 7 ). Upon assembly of the portion of the cooktop assembly, the erection unit 16d is moved as a unit to its mounting position with the sensor elements 24d, 26d, 58d relative to each other and relative to a portion of the erection units 16d different from the sensor elements 24d, 26d, 58d. immovable. The positioning unit 30d has a temperature sensor element 60d (FIG. FIG. 8 ), which is identical in construction to the sensor element 24d and is arranged below an integrally formed element 62d of the setting-up unit 30d, which is made of copper and forms an upper side of the setting-up unit 30d.

reference numeral

10

cooking zone

12

cover

14

main area

16

Aufstelleinheit

18

subregion

22

component

24

sensor element

26

sensor element

28

footprint

30

Aufstelleinheit

32

Aufstelleinheit

34

Aufstelleinheit

36

Main direction

38

Focus

40

Infrared temperature measurement element

42

recess

44

top

46

direction

48

element

50

Cookware

52

group

54

group

56

Aufstelleinheit

58

sensor element

60

Temperature sensor element

62

element

Claims (13)

A hob apparatus comprising at least one cooking zone (10; 10a; 10b; 10c; 10d), at least one cover member (12; 12a; 12b; 12c; 12d) having a major surface (14; 14a; 14b; 14c; 14d) of an overall surface of the cooking zone (10; 10a; 10b; 10c; 10d) and at least one first setting unit (16; 16a; 16b; 16c; 16d) forming part of the cooking zone (10; 10a; 10b; 10c; 10d) and which at least a partial region (18; 18a; 18b; 18c; 18d) which projects beyond the main surface (14; 14a; 14b; 14c; 14d) in at least one operating state, the partial region (18; 18a; 18b; 18c; 18d) has a higher temperature resistance than at least a portion of the cover member (12; 12a; 12b; 12c; 12d) forming at least part of the major surface (14; 14a; 14b; 14c; 14d). Hob device according to claim 1,
characterized in that
the main surface (14; 14a; 14b; 14c; 14d) is formed at least partially of hard glass and / or cordierite and / or mullite and / or silicon nitride and / or a ceramic matrix composite material. Hob device according to one of claims 1 or 2,
characterized in that
the first setting-up unit (16; 16a; 16b; 16c; 16d) has at least one electronic component (22; 22d) which projects beyond the main surface (14; 14a; 14b; 14c; 14d) in the operating state and / or in the operating state at least partially disposed in an upper third of the cover member (12; 12a; 12b; 12c; 12d). Hob device according to one of the preceding claims,
characterized in that
the first erection unit (16d) is a single assembly unit and has at least two sensor elements (24d, 26d, 58d). Hob device according to one of the preceding claims,
characterized in that
the first setting-up unit (16; 16a; 16b; 16c; 16d) has at least one first set-up surface (28; 28a; 28b; 28c; 28d) which is formed at least partially from copper and / or aluminum. Hob device according to one of the preceding claims,
marked by
at least one sensor element (24; 24d) of the first set-up unit (16; 16d) and at least one second set-up unit (32; 30d) which has at least one sensor element (26; 60d). Hob device according to one of the preceding claims,
marked by
at least four set-up units (16, 30, 32, 34, 16a, 30a, 32a, 34a) each forming part of the total surface of the cooking zone (10; 10a). Hob device according to one of the preceding claims,
characterized in that
the first erection unit (16) has a main extension direction (36) which extends radially with respect to a center (38) of the cooking zone (10) with respect to a plan view of the cooking zone (10). Hob device according to one of claims 1 to 7,
marked by
a first and at least one second group (52a, 54a) of erector units (16a, 30a, 32a, 34a, 56a) which are arranged substantially concentrically. Hob device according to one of the preceding claims,
characterized in that
the cooking zone (10b) has a shape of a circular area with respect to a plan view of the cooking zone (10b) and the first setting unit (16b) is secant-like or chord-like with respect to the circular area. Hob device according to one of the preceding claims,
marked by
at least one thermopile and / or an infrared temperature measuring element (40), which is provided for measuring a temperature of a cookware (50) arranged on the cooking zone. Hob with a hob device according to one of claims 1 to 11. A manufacturing method of manufacturing a cooktop apparatus, in particular according to one of claims 1 to 11, wherein at least a first setting unit (16; 16a; 16b; 16c; 16d) forming part of a cooking zone (10; 10a; 10b; 10c; 10d) and which has at least one partial region (18; 18a; 18b; 18c; 18d) which, in at least one operating state, extends over a main surface (14; 14a; 14b; 14c; 14d) of the cooking zone (10; 10a; 10b; 10c; 10d). on a cover member (12; 12a; 12b; 12c; 12d) which defines the main surface (14; 14a; 14b; 14d; 14b; 14d; 14c, 14d) is fastened.

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