JPS62113380A - Electromagnetic induction heating 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 electromagnetic induction cooking device equipped with a top plate.

2. Description of the Related Art As shown in FIGS. 5 and 6, this type of electromagnetic induction heating cooker has a heating coil 2 and a drive circuit 3 housed in a main body 1, and a top plate 4 made of a ceramic plate. A pot is placed on this top plate 4 and heated by electromagnetic induction.

Problems to be Solved by the Invention By the way, as shown in the figure, in the configuration in which a plurality of heating coils 2 are provided and a plurality of pots are placed on the top plate 4, a large top plate 4 is naturally used. The top plate 4 having such a large shape is warped and distorted during manufacturing, resulting in poor yield and high manufacturing costs. Furthermore, the large top plate 4 is prone to cracks at its outer edge, and when a load is applied, it breaks and exposes the live parts of the high-voltage drive circuit, which is dangerous.

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 electromagnetic induction heating cooker equipped with a top plate that is hard to break and can reduce manufacturing costs.

Means for Solving the Problems In order to achieve the above object, the present invention provides a so-called multi-hole electromagnetic induction cooking device equipped with a plurality of heating coils, the top plate of which has holes corresponding to each coil. It is constructed of a tempered glass plate and a ceramic plate fitted into the hole.

Function: In an electromagnetic induction cooker with this configuration, the base part of the top plate is made of a tempered glass plate, which is cheaper than the ceramic plate, and the ceramic plate has a small partial shape that corresponds to the coil, so the material is It becomes cheaper in terms of cost. Since the ceramic plate is small in size, it is less likely to warp or crack during manufacturing, resulting in a high yield. Furthermore, when a load is applied to a small ceramic plate using a pot or the like, the ceramic plate is difficult to break.

EXAMPLE An example of the present invention will be described below with reference to FIGS. 1 and 2.

In the figure, 6 is the main body of the electromagnetic induction heating cooker, which has a plurality of heating coils 6 and a drive circuit γ inside, and has a top plate 8 held at the upper part by a holding member 9. The top plate 8 includes a tempered glass plate 11 having holes 1o in portions corresponding to the heating coils, and an elastic body 12 such as rubber.
It is formed from a plurality of ceramic plates 13 that are fitted into the holes 10 with . Note that 14 in the figure indicates an operating body.

The electromagnetic induction heating cooker of this embodiment is a multi-mouth cooker and the top plate 8 is large in shape, but the ceramic plate 13 made of expensive material is small in shape, so the top plate 8 can be manufactured at low cost. Also, ceramic plate 1
Since the shape of No. 3 is small, warping and cracking are less likely to occur during manufacturing, and the yield is good.

Furthermore, the mechanical strength of the ceramic plate 13 is weaker than that of the tempered glass plate 11, so even if it breaks during use, cooking can be done on the ceramic plate 13 other than the broken part, and only the broken part can be replaced. It's good and convenient. Further, since an elastic body 12 such as rubber is interposed at the joint between the ceramic plate 13 and the tempered glass plate 11, the strain on the joint is alleviated, and a waterproof function is also provided. The elastic body 12 may be filled with liquid rubber or may be wrapped with rubber tape.

FIG. 3 shows another embodiment of the present invention, in which the hole 10 of the tempered glass plate 11 of the top plate 8 is tapered on the inside so that the hole 10 of the tempered glass plate 11 is tapered upward. The outside is also tapered to match this, making it easy to fit the ceramic plate 13 into the hole 10, and to prevent it from falling off even if load movement is applied.

FIG. 4 also shows another embodiment of the present invention, in which a ceramic plate 13 is provided so as to protrude beyond the surface of the tempered glass plate 11, so that the placed pot does not come into contact with the tempered glass plate 11. Therefore, safety is improved by preventing high heat from being transmitted to the tempered glass plate 11. Also tempered glass plate 1
1 is effective in preventing the bottom of the pot from sticking and improving the appearance. In addition, by making the tempered glass plate 11 transparent and, as shown in 1), printing any desired pattern on the back surface, various designs can be achieved.

Effects of the Invention As is clear from the description of the above embodiments, the electromagnetic induction cooking device according to the present invention has a top plate made of a tempered glass plate and a ceramic plate fitted into holes in the portion of the tempered glass plate that correspond to the heating coils. Since the top plate is composed of a plate, it is possible to manufacture the top plate for multiple ports at low cost, and the yield of the top plate is high, which is essential because it has great industrial value.

[Brief explanation of drawings]

Fig. 1 is a sectional view of an electromagnetic induction cooking device according to an embodiment of the present invention, Fig. 2 is a perspective view thereof, and Figs. FIG. 6 is a perspective view of a conventional electromagnetic induction heating cooker, and FIG. 6 is a cross-sectional view of the same. 6...Main body, 6...Heating coil, 8.
...Top plate, 1o ... Hole, 11
...Tempered glass plate, 13...Ceramic board. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 3
Figure 4 Figure 5 Figure 6 J J

Claims (5)

[Claims] (1) Electromagnetic induction heating comprising a tempered glass plate equipped with a plurality of heating coils and having holes corresponding to each of the coils, and a top plate made of a ceramic plate fitted into each hole of the tempered glass plate. Cooking device. (2) The electromagnetic induction cooking device according to claim 1, wherein the ceramic plate and the tempered glass plate are joined via an elastic body. (3) The inner wall of the hole in the tempered glass plate is tapered so that the upper hole diameter becomes larger, and the ceramic plate has a tapered outer surface that fits the hole. The electromagnetic induction heating cooker described in . (4) The electromagnetic induction cooking device according to any one of claims 1 to 3, wherein the ceramic plate is provided so as to protrude above the tempered glass plate. (5) The electromagnetic induction heating cooker according to any one of claims 1 to 4, wherein the tempered glass plate is transparent.