JPS6045326A - Electric cooker - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electric cooker equipped with a coiled heating wire as a heating element.

Conventional structure and problems An electric cooking device, generally called a hot plate, has grooves 2 formed on the back side of a cooking plate 1 made of iron or aluminum, and an insulating layer inside the grooves 2, as shown in Fig. 1. In addition to providing the material 3, a coiled heating wire 4 is also provided. In addition, 5 in the figure is a connection part, and 6 is a plug equipped with a temperature control part.

As shown in FIG.
It's like telling almost the entire story.

Therefore, the groove 2 has several bends 7. As shown in FIG. 3, a first insulating material 3a is provided in the groove 2, a heating wire 4 is placed thereon, and a second insulating material 3b is pressed and provided thereon. As shown in the figure, the heating wire 4 is connected to the groove 2 at the bent part 7 of the groove 2.
Between the inside of the.

The distance a is smaller than the other straight portions of the groove 2.

In particular, when pressing the second insulating material 3b, the heating wire 4
may move and the distance a may become smaller.

Further, since the heating wire 4 is in a coil shape, when it is bent at the bending portion 7, the coil portion becomes densely packed and generates a large amount of heat compared to other portions.

The heat of the heating wire 4 is transmitted to the cooking plate 1 via the first insulating material 3a, but from the above, the temperature locally increases in the portion of the cooking plate 1 corresponding to the bent part of the groove 2. There is a problem in that it becomes expensive and causes uneven cooking of the cooked food.

In addition, the distance a between the heating wire 4 at the bent portion 7 of the groove 2,
In other words, there is a problem that a sufficient insulation distance cannot be secured.

Purpose of the Invention The present invention has been made in consideration of the above-mentioned conventional problems, and an object of the present invention is to provide an electric cooker that does not generate localized high-temperature areas on the cooking plate and can provide a sufficient insulation distance for the heating wires. That is.

Structure of the Invention In order to achieve the above-mentioned object, the present invention provides an electric cooking device in which a groove having a bent portion is formed on the lower surface of a cooking plate, and a coiled heating wire is disposed within the groove through an insulating material. In this embodiment, the groove width of the bent portion of the groove is made larger than the groove 1 of the other portion of the groove. Based on this configuration, even if the heating wire generates a large amount of heat due to the concentration of coils in the bent part, this is suppressed and the heat is transferred to the cooking plate, preventing the generation of local high-temperature areas on the heating plate. Even if there is a positional shift of the heating wire at the bent portion, a sufficient electrical insulation distance can be obtained.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 6 and 7.

In the figure, 8 is a cooking plate, 9 is a substantially concave groove formed on the back side of the cooking plate 8, and 1o is inside the groove 9.

The insulating material 11 is a coiled heating wire disposed within the groove 9. Bent portion 12 in the groove 9
As shown in FIG. 6, the width of the straight portion of the groove 9 is increased by about 1 to smm in this embodiment, which is formed to have a large groove width.

According to the above configuration, the area where the insulating material 10 contacts the cooking plate 8 at the bent portion 12 of the groove 9 is wider than that in FIG. 7a as shown in FIG. The heating wire 1 at the bent portion 12 is smaller than the cooking plate 8.
Even if the calorific value exceeds 10, it is suppressed from being transmitted to the cooking plate 8, and the occurrence of localized high-temperature parts on the cooking plate 8 is eliminated, so that uneven cooking of the food can be prevented. Further, even if variations occur in the position of the heating wire 11, the necessary electrical insulation distance can be maintained.

Effects of the Invention As is clear from the description of the embodiments described above, the electric cooking device according to the present invention has coiled heating wires disposed in the grooves of the cooking plate through an insulating material. There is no generation of high-temperature parts, and sufficient electrical insulation is obtained at the bent portions of the heating wire, which is of great value in terms of cooking and safety.

[Brief explanation of drawings]

Figure 1 is a sectional view of a conventional electric cooker, Figure 2 is a bottom view of the same, Figure 3 is a sectional view of the same main part, Figure 4 is a configuration diagram of the bent part of the groove, and Figure 5 is the main part. A bottom view of an electric cooking appliance according to an embodiment of the invention, FIG. 6 is a configuration diagram of the bent portion of the groove, FIG. 7 is a sectional view taken along line B-B in the figure. 8... Cooking board, 9... Groove, 10...
... Insulating material, 11 ... Heating wire, 12 ...
...Bending part. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 3 Figure 3b Figure 5 Figure 2 Figure 6 Figure 7

Claims (1)

[Claims] In addition to forming grooves with bent parts on the lower surface of the cooking plate,
An electric cooking device, wherein a coiled heating wire is disposed in the groove with an insulating material interposed therebetween, and the width of the bent portion of the groove is larger than the width of the other part of the groove.