JPS5931137Y2 - electric cooker - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an improved electric cooker.

Conventionally, this type of device has a pipe-shaped heater installed in the housing.
A cooking plate was placed above this heater.

In order to make the temperature distribution uniform on the upper surface of the cooking plate, the distance between the heater and the cooking plate has been increased, or a heat equalizing plate has been provided between the heater and the cooking plate.

However, those in which the distance between the heater and the cooking plate is large have extremely low thermal efficiency, and those in which a heat equalizing plate is provided have the drawbacks of high cost and low thermal efficiency.

In order to eliminate the drawbacks of the conventional example, the present invention provides a protrusion on the bottom surface of the cooking plate directly above the heater, and also reduces the thickness of the cooking plate as it goes away from the heater. To provide an electric cooker in which the temperature distribution on the upper surface of the cooking plate is made uniform by placing the cooking plate close to each other, and the thermal efficiency is improved.

Hereinafter, embodiments of the present invention will be explained in detail with reference to the drawings. Fig. 1 shows an embodiment of the present invention, where 1 is a cooking plate, 2 is a heater, 3 is a housing, and 4 is a heater. 2
5 is a temperature regulator.

Here, a protrusion 1a is formed on the lower surface of the cooking plate 1 along the heater 2, and as shown in FIG. 2, the thickness of the cooking plate 1 becomes thinner as it moves away from the heater 2. It is.

The lower surface of the cooking plate 1 formed in this manner is inclined, and this inclination is particularly large near the protrusion 1a.

FIG. 2 is a diagram showing the temperature distribution on the top surface of the cooking plate 1 when the cooking plate 1 is heated by the heater 2 placed at a distance of 11 from the top surface of the cooking plate 1.
indicates the set temperature.

FIG. 2a shows a case where the conventional cooking plate 1 is used, and the temperature of the part directly above the heater 2 is the set temperature t.

It's much hotter than that. For this reason, conventionally, in order to make the temperature distribution on the surface of the cooking plate 1 uniform, it was necessary to increase the distance between the cooking plate 1 and the heater 2, resulting in low thermal efficiency.

However, as shown in FIG. 2, when the cooking plate of this embodiment is used, the tip of the protruding portion 1a is formed small, so the amount of heat directly received by this portion is small; Both sides have a large slope and reflect heat, so the protrusion 1
The amount of heat received by a is relatively small, and the protrusion 1
Since the thickness of the cooking plate 1 near a is large, this part has a large heat capacity and a wide cross-sectional area for heat conduction, so heat is easily transmitted to the thin part, so the temperature distribution on the top surface of the cooking plate 1 is approximately It becomes uniform.

In this way, when the cooking plate 1 of this embodiment is used, the heater 2 can be provided close to the cooking plate 1, and the thermal efficiency is significantly improved compared to the conventional one.

Here, on the lower surface of the cooking plate 1, the vicinity of the protruding portion 1a may be finished in a mirror-like state, or the thin portion may be coated with a paint having a high heat absorption rate, so that the thin portion can receive heat relatively easily. This allows the temperature distribution on the upper surface of the cooking plate 1 to be made more uniform.

FIG. 3 shows the configuration of another embodiment of the present invention.
Items with the same symbols as in Figure 1 indicate the same items,
Further, 6 is a biasing spring for bringing the heater 2 into pressure contact with the cooking plate 1.

In this embodiment configured as described above, since the heater 2 is in pressure contact with the cooking plate 1 by the biasing spring 6, the distance between the heater 2 and the top surface of the cooking plate 1 is constant, and the heating conditions are always constant. There is an effect that

As described above, the present invention has an advantage not found in the prior art in that the heater and the cooking plate are arranged close to each other or in contact with each other, thereby increasing thermal efficiency and making the temperature distribution on the upper surface of the cooking plate uniform.

[Brief explanation of the drawing]

Fig. 1a is an exploded perspective view showing the configuration of an embodiment of the present invention, Fig. 1 is a sectional view taken along line B-B when Fig. 1a is assembled, and Fig. 2 is a view of the upper surface of the cooking plate. FIG. 2a is a diagram showing temperature distribution, and FIG. 2a shows that when a conventional cooking plate is used,
FIG. 2 is a temperature distribution diagram on the upper surface when a cooking plate according to one embodiment of the present invention is used, and FIG. 3 is a sectional view showing the structure of another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1...Cooking plate, 1a...Protrusion of cooking plate 1, 2...Heater, 3...
...Housing, 4...Insulation material, 5...Temperature regulator, 6...Biasing spring, 11...
The distance between the heater 2 and the top surface of the cooking plate 1, to...
····Preset temperature.

Claims (3)

[Scope of utility model registration request] (1) In an electric cooker in which a pipe-shaped heater is provided in the housing and a cooking plate is arranged above the heater, a protrusion is provided on the lower surface of the cooking plate directly above the heater, and the protrusion is connected to the heater. in contact or proximity;
An electric cooking appliance characterized in that the thickness of the cooking plate becomes thinner as the distance from the heater increases. (2) Electric cooking according to claim (1) of the registered utility model, characterized in that the surface of the protruding portion is treated to have a higher heat reflectance than the other surface of the lower surface of the cooking plate. vessel. (3) The electric cooker according to claim (1), wherein the heater is elastically pressed against a protrusion on the lower surface of the cooking plate.