DE7736873U1 - COOKING PLATE, PREFERABLY CERAMIC GLASS HOB - Google Patents

Description

BOSCH-SIEMENS lJAUSGERÄTE (ϊΜίϊΗ / <8f) 0Q-Mnnfhep 80, Ik. 11. 1977 Stuttgart """ ^ctc '" Hochstrasse 17

Our reference: TZP 77/649 Ke s / where

Hotplate, preferably glass ceramic hob

The innovation relates to a hotplate, preferably to .eine glass ceramic hob, with one below the Plate-arranged, spiral-shaped electrical heating element as well as with one within the cooking surface area thermostat temperature sensor thermally coupled to the hotplate.

In a known, made of glass ceramic hotplate (German Offenlegungsschrift 23 Oi 928) is in the center of Cooking surface and thus an unheated zone in the center of the flat heating element on the underside of the plate, in which the temperature sensor is coupled directly to the underside of the glass ceramic plate. To a largely exact To be able to regulate the temperature, there must be good thermal contact between the temperature sensor and the bottom of the pan, if the temperature sensor precisely records the pot base temperature target. However, there is no good thermal contact if the bottom of the pot is concave to a greater or lesser extent inwardly is.

It has therefore been proposed to place the unheated zone at the edge of the To relocate the cooking surface, which means that there is good thermal contact between the pan even if the bottom of the pan is heavily cambered The edge of the pot bottom and the hotplate and thus between the bottom of the pot and temperature sensor is guaranteed. This opens the

^{1 1} BZP 7-7 / 649

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Possibility of heating the center of the cooking surface as well as the other areas of the cooking surface. However, the precludes that, in known contact or radiant heaters for glass ceramic hobs with integrated tem- ί in temperature sensors of one of the electrical connections of the heating

bodyBrs ~ more-or-less-g-ei = —in the — Zen4rT4im — der_Ko.chfläjche__ lies.,

which increases the overall height of the flat radiator including the electrical connection elements as well as the possible Complete heating of the surface center is difficult.

The innovation is based on the task of the flat radiator of a hotplate of the type mentioned with respect to a low overall height and with regard to the most complete possible heating of the available areas improve.

According to the innovation, this object is achieved in that an unheated zone for the cooking surface is provided at the edge area of the cooking surface thermal coupling of the temperature sensor is provided, and that the remaining area of a bifilar guided heating element is coated, its electrical connections on the hob periphery lie. In this way, all necessary for the electrical connection of the radiator can Connection elements are arranged outside the heated area of the hotplate so that ζ. B. in the cooktop center there is no need to have an unheated zone. According to a further embodiment of the innovation extends across the cooking surface a temperature sensor of a safety temperature limiter at a short distance from the radiator. Here is a reliable and exact recording of the heat emitted by the radiator is favored by the fact that the individual Coils of the radiator can cover the entire cooking surface practically without any gaps, thus ensuring optimal thermal Coupling of the T-temperature sensor to the Heizwihdungen_ made possible will.

Further details of the innovation can be found in the

The drawing. And the following-described - leadership example.

It shows:

Fig. I is a plan view of the heating device shown as a detail of the hotplate according to the innovation,

Fig. 2 is a partial sectional view of the hotplate according to the invention according to the section lines II-II in Figure 1.

. In the figures, a circular housing made of insulating material is denoted by 1, _ which has a continuous, round recess 2 at the edge area, in which a temperature sensor 3, known per se, is arranged, which temperature sensor 3 with a temperature-controlled switching or not shown Control device is connected by means of a line k . The temperature sensor 3 is pressed against the underside of a glass ceramic hotplate 5 by a spring 18. The aforementioned housing 1 is attached to the same underside of the glass ceramic hotplate, as FIG. 2 shows. The housing 1 also has a trough-like recess 6 in which an electrical heating element 7, shown in dashed lines in FIG. 1, is laid. The turned-side heating element 7, designed as a flat heating element, is guided in a spiral shape, the spiral shape being flattened in the region of the recess 2 or the wall S surrounding the recess 2. As FIG. 1 clearly shows, the turns of the heating element 7 are laid bifilar, the electrical connections 9 and 10 of the electrical heating element 7 being on the periphery of the cooking surface. A safety temperature limiter 12 is attached to the housing 1 indirectly via a plate 11, to which one of the electrical connections 10 of the heating element 7 is connected via a bushing 13. The other electrical connection 9 of the heating element 7 is led out of the housing 1 at a different point on the hob periphery. With Ik is a dem

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B- 77/649

Safety temperature limiter 12 associated with it and connected to it via a rocker 15 temperature sensor denotes which is mounted on both sides in the housing 1 and which extends across practically the entire cooking surface with a small distance to Heizkb_rp.ex_.7., extends, _woj bei this Rod-shaped temperature sensor covers practically all turns of the spiral-shaped heating element 7.

h claims for protection
2 figures

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Claims (3)

BOSCH-SIEMENS HOME APPLIANCES. (irMKH '..'. '.. SOOO.'München 80, January 31, 1978 Stuttgart Hochstrasse 17 official file number: Our reference: TZP 77/6 ^ 9 G 77 36 873.1 Kes / ant Scliutz claims 1. Hot plate, preferably a glass ceramic hob, with a spiral-shaped support »the plate guided electric flat heating element, as well as with one inside the cooking surface area on the hotplate thermally coupled thermostat temperature sensor, characterized in that an unheated zone at the edge of the cooking surface (Recess 2) is provided for the thermal coupling of the temperature sensor (3), and that the remaining area is covered by a Mfilar guided heater (7), the electrical connections (9,10) on the The periphery of the cooking surface. 2. Cooking plate according to claim 1, characterized in that the electrical connections (9, 10) of the bifilar heating element (7) at different points on the periphery of the cooking surface are arranged. 3. Cooking plate according to claims 1 and / or 2, characterized in that that there is a temperature sensor across the cooking surface at a small distance from the heating element (7) (14) a safety temperature limiter (12) extends. V., ι Ji H. Cooking plate according to claim 3> characterized in that the heating element and the temperature sensor (3jlA) are mounted in a common housing (l) and that in addition on the housing the electrical connection element for the heating element (7) and with the temperature sensor {lh) mechanically connected safety temperature limiter (12) "is attached.