JPS6016232A - Electric heating device - Google Patents

Abstract

PURPOSE:To improve the safety against boiling-over of broth by a structure wherein a gap formed between an inner peripheral heating plate and an outer peripheral heating plate is blocked by the annular recession formed upwardly protruded on a cooker main body. CONSTITUTION:When a hot plate 31 is placed on the titled device, heating is done by energizing an electric heat generating body 28. On the other hand, when a pot 32 is placed on the titled device, heating is done by energizing only an electric heat generating body 27. Even if broth boils over the pot 32, the broth can not enter a cooker main body 21, because a gap 29 is blocked by a protrusion 30. In addition, the pot 32 can be positioned by utilizing the gap 29. Further, in order to realize the sure surface contact between the hot plate 31 and an inner peripheral heating plate 25, the inner peripheral heating plate 25 may be positioned a little lower than an outer peripheral heating plate 26 or the inner peripheral heating plate 25 may be energized upwards by means of springs or the like.

Description

[Detailed Description of the Invention] The present invention relates to an electric heating device for removably mounting and heating a cooking device such as an electric pot or a hot plate, and its purpose is to improve safety against boiling over of boiling liquid. .

Conventionally, this type of electric heating device has had an electric heating element 2 built into a heating plate 1 having a flat top surface, as shown in FIG. When the hot plates 1 and 3 are placed on this electric heating device, as shown in FIG. 2, the heating plate 1 and the hot plate 3 are in full contact with each other, and cooking is performed with good thermal efficiency. However, when a small-diameter pot 4 is placed on this electric heating device, as shown in FIG. 3, the outer periphery of the heating plate 1 is exposed, does not contribute to heating the pot 4, and heat loss is large. Thermal efficiency was extremely poor.

Conventionally, as a means to eliminate the drawbacks of the above-mentioned electric heating device,
An electric heating device as shown in FIGS. 4 and 5 has been proposed.

That is, the heating plate 6 is connected to the inner circumference 7 by the ring-shaped four parts 6.
and an outer peripheral part 8, electric heating elements 9.1o are provided in the inner peripheral part 7 and outer peripheral part 8, respectively, and a through hole 11 is formed in the recessed part 6. This electric heating device can heat the entire surface by energizing both electric heating elements when a real plate 1 is placed, and only the electric heating element 9 on the inner peripheral part 7 is heated when a small diameter pot is placed. Heating can be done by applying electricity to the in this case,
The inner peripheral part 7 and the outer peripheral part 8 of the heating plate 5 have a recess 6 and a through hole 11.
Since it is partitioned by , there is no heat conduction to the outer circumferential portion 8, and therefore, it has the feature that heat loss is small. However, if the broth blows out of the pot, the broth will leak through the hole 11.
This has the disadvantage that it penetrates into the main body below, causing deterioration of the insulation of internal electrical components.

and explain.

In FIGS. 6 to 8, reference numeral 21 denotes a substantially box-shaped cooking device main body, and a pair of legs 22 serving as handles are attached to the left and right sides, and an operating frame 23 is provided on the front surface. On the top surface of the cooking device main body 21 is a heat-sensitive device 24 that is biased upward.
, an inner circumferential heating plate 25, and an outer circumferential heating plate 26 are arranged and fixed concentrically.

27 and 28 are the inner heating plate 26 and the outer heating plate 26, respectively.
This is an electric heating element installed in the A ring-shaped gap 29 is formed between the inner circumferential heating plate 25 and the outer circumferential heating plate 26,
This gap 29 is closed by a ring-shaped convex portion 30 formed on the upper surface of the cooking device main body 21 and convex upward. 31
is a hot plate, and 32 is a pot. The trench operation frame 23 is provided with a temperature control knob 33, an energization indicator lamp 34, and a changeover switch 36 for switching energization to the electric heating elements 27 and 28. Reference numerals 36 and 37 designate a screw for fixing the inner heating plate 25 and the outer heating plate 26 to the cooking device main body 21.

In the above configuration, when the plate 1-' plate 31 is placed as shown in FIG. 7, the electric heating element 28 is energized to heat it. Further, when the pot 32 is placed as shown in FIG. 8, only the electric heating element 27 is energized to heat it. When the broth is blown from the pot 32, the gap 29 is closed by the convex portion 30, so the broth will not enter into the cooking device main body 21.
When placing the paper, the gap 29 can be used for positioning. In addition, the hot plate 31 and the inner circumferential heating plate 2
In order to ensure surface contact in step 5, the inner heating plate 25 may be positioned slightly lower than the outer heating plate 26, or the inner heating plate 25 may be placed slightly lower than the outer heating plate 26.
How many minutes should it be moved upward by a spring, etc.

As is clear from the above description, according to the present invention, the thermal efficiency is high even when pots of different sizes are placed, and even if the broth spills from the pot, the broth will not enter the cooking device main body. The insulation deterioration of internal electrical parts can be prevented without any problems, and the effect is extremely large.

[Brief explanation of the drawing]

Figure 4 is a sectional view of a conventional electric heating device, and Figure 2 is a sectional view of the same device with a hot plate placed on it.
Fig. 3 is a sectional view of the same device with a pot placed on it, Fig. 4 is a plan view of another conventional electric heating device, Fig. 5 is a sectional view of the same, and Fig. 6 is an embodiment of the present invention. FIG. 7 is a cross-sectional view of the electric heating device with a hot plate placed on it, and FIG. 8 is a cross-sectional view of the electric heating device with a pot placed on it. 21... Cooker main body, 25-... Inner periphery heating plate, 26
...Outer heating plate, 27.28... Mountain electric heating element,
29...Gap, 30-...Protrusion. Name of agent: Patent attorney Toshio Nakao (1st person)
Figure 9 Figure 3

Claims (1)

[Claims] A cooking device main body, an inner heating plate fixed on the cooking device main body and having an electric heating element, and an outer heating plate located on the outer periphery of the inner heating plate and fixed on the cooking device main body and having an electric heating element. An electric heating device comprising: a gap formed between the inner circumferential heating plate and the outer circumferential heating plate; closed by an upwardly projecting ring-shaped convex portion formed on the cooking device main body.