JPH04106319A - Electrical cooking device - Google Patents

Abstract

PURPOSE:To provide an electrical cooking device having a heating device in which manufacturing stage is simple, a heating source is not deformed or dropped and a uniform distribution of temperature is attained by a method wherein a pitch of the heating source disposed at a central part is larger than a pitch of the heating source disposed at an outer circumference in a heating zone. CONSTITUTION:A heating device 5 is constructed such that its upper surface is opened, a heat insulating member 7 having the same shape as that of the heating device is disposed inside an outer cylindrical frame 6 having a bottom part. Heating sources 4 composed of a halogen lamp are disposed at right and left sides of a central part through the outer frame 6 and the thermal insulating member 7. Normally, in the event that a plurality of heating sources 4 such as halogen lamps are disposed, it is preferable that the lamps are spaced apart by more than three times of a diameter of the lamp so as to eliminate a relative thermal interference of the heating sources 4 such as halogen lamps. Then, they are spaced apart by a pitch of 2.5 times of a pitch of 24 to 30 mm, i.e., a pitch of 60 to 75 mm at the right and left sides of the central part. In this way, it is possible to realize the heating source having no heating disturbance in response to a disposing condition for spacing apart the rod-like heating sources 4 such as the halogen lamps from the central part of the heating zone.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electric cooker having a plurality of stoves using rod-shaped heat sources such as halogen lamps.

BACKGROUND OF THE INVENTION Conventionally, this type of electric cooking appliance has had a structure as shown in FIG. The upper opening 2 on the instrument body as shown in Figure 3
A heat-resistant glass plate 3 is attached to the stove, and a plurality of stove sections 5c, 5d, and 5e each having a heat source 4 made of a nichrome wire, a halogen lamp, etc. are provided inside.

As shown in FIG. 4(a), an example of the stove part i has an open top, a bottomed cylindrical outer frame 6a, and a heat insulating material 7 of the same shape in contact with the inside of the bottomed cylindrical outer frame 6a. A heat source 4 made of a lamp or the like is installed to penetrate the outer frame 6 and the heat insulating material 7, and a linear heat source 4a made of nichrome wire or the like is placed near the outer frame 6 away from the center of the cylindrical heat insulating material. It was arranged along the inside of the material 7, and the respective heat sources 4 and 4a were connected.

In addition, the stove part 5c shown in FIG. 4, etc.) is as shown in FIG.
Similarly, a heat insulating material 7 of the same shape is placed inside the bottomed cylindrical outer frame 6.
A plurality of rod-shaped heat sources 4 made of halogen lamps or the like are provided penetrating the outer frame 6 and the heat insulating material 7 toward the center.

As shown in FIG.
It was fixed inside.

Problems to be Solved by the Invention In such a conventional configuration, as shown in the conventional example in FIG. 4(a), the heat source 4.4a is arranged so that the entire heating zone 8 has a substantially uniform temperature. Although efficient heating is possible due to the fact that the heating tube 8 has a circular shape and is set to approximately the same diameter as the cooking vessel 9 shown in Fig. 3, In order to prevent the shaped heat source 4a from being deformed by heat, it is fixed to the bottom of the heat insulating material 7 at a plurality of locations with pins 10, as shown in FIG. 4 (C1).

However, since this bottle 10 may be thermally deformed and detached from the heat insulating material 7, a part of the nichrome wire is removed as shown in Fig. 4(C).
It is necessary to embed it in the heat insulating material 7 as shown in FIG. The process of embedding the nichrome wire in the insulation material requires a great deal of technical know-how, and the problem was that it was difficult for anyone to easily manufacture.

Furthermore, in another conventional example shown in FIG. 4(b), a heat source 4 such as a rod-shaped halogen lamp is connected to
A plurality of pieces are arranged at equal intervals inside the outer frame 6 and the insulation material 7.
It was designed to penetrate and be fixed. In this case, although the configuration is simple, the temperature at the center of the heating zone 8 becomes high, and temperature unevenness occurs in the entire heating zone 8 where the center becomes high in temperature. When such temperature unevenness occurs, there is a problem that when cooking in the cooking container 9, the heating of the food is uneven, and the food cannot be cooked properly.

The present invention solves these problems, and aims to provide an electric cooker that has a stove part with a uniform temperature distribution, which has a simple manufacturing process, prevents the heat source from deforming and falling off, and which has a uniform temperature distribution. It is.

Means for Solving the Problems In order to achieve this object, the electric cooker of the present invention consists of all the heat sources of the stove section with rod-shaped heat sources such as halogen lamps to improve the reliability of the heat source, and also to improve the reliability of the heat source. The pitch of the heat sources disposed at the center of the inner vessel is made larger than the pitch of the heat sources disposed at the outer periphery to make the temperature distribution in the stove part uniform.

Function: With this configuration, the outer frame and the heat insulating material of the stove part of the cooker of the present invention are shaped like an elliptical cylinder, and since the pitch of the heat source consisting of a halogen lamp located at the center of the heating zone is large, the center of the stove part Heat is not concentrated in the center, and temperature peaks do not occur in the center, resulting in a uniform temperature distribution.

EXAMPLE An example of the present invention will be described below with reference to FIG. 1, FIG. 2(a), and FIG. 2(b). Note that the same members as in FIGS. 3 and 4 (a), (C), and (C) are given the same reference numbers. As shown in Fig. 1 and Fig. 2 (a), the stove part has an open upper surface and a bottomed elliptical cylindrical outer frame 6 with a heat insulating material 7 of the same shape installed inside, and halogen lamps on the left and right from the center. Heat 'a4 consisting of the like is provided through the outer frame 6 and the heat insulating material 7.

Normally, the diameter of the heat source 4 such as a halogen lamp is 8 to 1.0 mm, and when multiple heat sources 4 are installed, the diameter is three times the diameter of the halogen lamp in order to reduce mutual thermal interference between the heat sources 4 such as halogen lamps. It is said that it is better to keep the distance between the two. Therefore, for example, in order to prevent thermal interference, the arrangement pitch (P2 in FIG. 2(a)) needs to be 24 to 30 mm. At this time, the pitch (P in Fig. 2 (a)) arranged on the left and right from the center is set to 24 to 30I.
2.5 times or more the pitch of III11, i.e. 60~
It has a pitch of 75 mm.

In order to realize this arrangement pitch relationship, the heating zone 8 is changed from the cylindrical shape shown in FIGS. 4(a) and (b) to the cylindrical shape shown in FIG.
) It is constructed in an elliptical shape as shown in ( ). If the heating zone 8 is configured in an extremely elliptical shape, the heating zone 8 will be smaller than the diameter of the cooking container 9.
As the protruding part increases, the above-mentioned arrangement pitch was experimentally determined to satisfy the conditions of minimizing the protruding part and reducing heating unevenness as shown in Figure 2 (bl). .

As described above, by placing the rod-shaped heat source 4 such as a halogen lamp away from the center of the heating zone 8, a heat source that does not cause uneven heating can be realized. Although a halogen lamp is used as the rod-shaped heat source in this embodiment, the present invention is not limited to this, and any type of heat source may be used as long as it can be used as a heat source.

Effects of the Invention As described above, according to the present invention, when the heat source of the stove section is composed of only halogen lamps, heating can be achieved by increasing the arrangement pitch of the halogen lamps toward the center of the heating zone of the stove section. Temperature peaks no longer occur in the center of the zone. As a result, the entire heating zone has a uniform temperature, and the food can be heated uniformly when cooking using the cooking container.

In addition, the heat source is entirely made up of rod-shaped heat sources such as halogen lamps, and the heat source can be installed by simply penetrating the outer frame and insulation material, making it easy to install and ensuring accurate heat source installation. This has the effect of being able to.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway perspective view of an electric cooking device according to an embodiment of the present invention, and FIG. 2 (al is a perspective view of the stove part of the same cooking device, and FIG. FIG. 3 is a plan view showing the heating zone, and FIG. 4 is a partially cutaway perspective view of a conventional cooking device.
) is a perspective view of the stove part of the same cooker, FIG. 2(b) is a perspective view showing another example of the stove part of the same cooker, and FIG. FIG. 3...Heat-resistant glass, 4...Heat source, vertical,
5a, 5b...Stove part, 6...Outer frame, 7...Insulation material, 8...Heating zone, 9
... Cooking container, P, , P2 ... Arrangement pitch. Name of agent Patent attorney Akira Okaji and 2 others F Frame + y) + 1/) a: IcP Figure

Claims (1)

[Claims] A heat-resistant glass plate is placed in the upper opening of the appliance main body, and a plurality of stove parts abutting the lower surface of the heat-resistant glass plate, and a cooking container placed on the heat-resistant glass plate directly above the stove part. The stove part includes a bottomed elliptical cylindrical outer frame, a heat insulating material disposed in contact with the inner side of the outer frame, and a plurality of rod-shaped heat sources disposed through the outer frame and the heat insulating material. An electric cooker comprising: an electric cooker in which the pitch of the heat sources is increased in the center of the heating zone.