JPS5846740Y2 - electric cooker - Google Patents

Description

[Detailed description of the invention] The present invention relates to electric cooking appliances such as electric rice cookers, electric pots, electric waterless pots, hora I plates, skillets, etc., and particularly relates to electric cooking appliances that can separate the heating plate and the pot. .

Generally, it is most desirable to control the temperature in this type of electric cooker by sensing the pot temperature.

In other words, the temperature of the pot is closest to the temperature of the food being cooked.

However, since the pot is actually washed with water after cooking, it is not possible to incorporate a temperature sensing device into the pot, and instead the temperature sensing device is built into the heating plate.

With this configuration, since the pot is simply placed flat on the heating plate, the temperatures of the two do not match and the complete pot temperature cannot be detected. Ta.

The purpose of this invention is to provide an electric cooker that improves heat transfer between the heating plate and the pot, maintains the pot in a stable state, and can detect temperatures close to the pot temperature even if a temperature sensing device is installed on the heating plate. It's there to do.

As a means for improving heat transfer, the present invention provides a heating plate and a pot with uneven parts having a trapezoidal cross section that fit into each other, that is, the side walls of the trapezoidal cross section can make thermal contact. The heat transfer is maintained in a stable state by crushing foreign objects, and the temperature of the pot can be indirectly adjusted by adjusting the temperature of the heating plate.

Referring to the drawings, the heating plate 1 has a substantially circular sheathed heater 2 integrally formed therein by casting or the like, and is configured to be heated by the heater 2.

A plurality of legs 3 are attached to the bottom so that the device does not become hot even when used on the floor or table.

Further, a hole 4 for temperature sensing is provided on the side surface of the heating plate 1.

The upper surface of the heating plate 1 is formed with convex portions 5, 6.7 having a circular planar shape into which the pot 8 is fitted when placed.

The bottom surface of the pot 8 has convex portions 5, 6, .
recessed portions 5', 6', which fit tightly into and communicate with 7, respectively;
7' is the placement.

Further, the pot 8 is provided with a handle 9 that can be held by hand when removing the pot 8.

A lid 10 provided with a knob to cover the pot 8 is placed on the top of the pot 8.

Further, the heating plate 1 is provided with a removable controller roller 12 which is equipped with a heat-sensitive rod 14 that senses the temperature of the heating plate 1 and controls energization to the heater 2, and has a temperature control knob 13. 13, the temperature of the heating plate 1 is maintained at a constant temperature, and the temperature of the pot 8 is indirectly maintained at a constant temperature by the temperature of the heating plate 1.

Further, the convex portions 5, 6.7 and the concave portions 5', 6', 7' provided on the heating plate 1 and the pot 8 each have a trapezoidal cross section as shown in FIG.

That is, the convex portion 5 has a tapered side wall 5a, and the four portions 5' have a tapered side wall 5b, and the side walls 5a each have a tapered side surface.

5b are configured to fit closely together, and the top portion 5C of the convex portion 5 and the valley portion 5d of the concave portion 5' are configured to have a gap t.

With the above configuration, the heat transfer surfaces of the heating plate 1 and the pot 8 are mainly the side walls 5 a and 5 b that are in direct contact with each other, and the other surfaces through the gap t are heat transfer via an air layer. ing.

However, heat transfer from the heating plate 1 to the pot 8 is such that when the pot 8 is placed on the heating plate 1, the side walls 5a and 5b are pressurized by the weight of the pot 8 and the total weight of the food in the pot 8. Ru.

At this time, the side walls 5a and 5b are inclined surfaces, and are firmly pressed together due to the wedge effect, and are maintained in a good heat transfer state.

Therefore, according to the embodiment of the present invention, by simply placing the pot on the heating plate, the side walls are firmly attached due to the wedge effect, so that the heat transfer state can be maintained in a stable state. The side walls allow it to be fixed in a stable position without shifting.

Further, even if foreign matter or the like adheres to the surface of the heating plate 1, it can be crushed by the side walls, and good heat transfer can be maintained.

As described above, in the embodiment of the present invention, the temperature difference between the pot and the heating plate can be made extremely small.

As described above, according to the present invention, even if the temperature sensing device is located on the heating plate, a temperature close to the pot temperature can be sensed, resulting in an extremely effective electric cooking device.

In addition, in this invention, when the pot is placed, the side walls are in contact with each other with a large surface pressure due to the wedge effect, and when the heating plate is heated and a temperature difference is created between the heating plate and the pot, the temperature difference between the two The degree of adhesion between the side walls increases due to the difference in the amount of thermal expansion, and the side walls are in complete contact with each other, further reducing the temperature difference between the pot and the heating plate.

It goes without saying that the same effect can be obtained in the present invention by forming uneven portions 7 and 7' as shown in FIG.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of the electric cooker of the present invention, Fig. 2 is a perspective view of the pot of the present invention, Fig. 3 is a perspective view of the heating plate of the present invention, Fig. 4 is a detailed sectional view of the main parts of the present invention, FIG. 5 is a sectional view of an electric cooker showing another embodiment of the present invention. Explanation of symbols 1...Heating plate, 2...Heater, 5,6゜7...Protrusion, 5', 6', 7
'...Concavity, 5a, 5b...Side wall, 8...Pot.

Claims (1)

[Scope of utility model registration request] A trapezoidal cross-sectional unevenness is formed on the surface of the heating plate so that the temperature of the heating plate is as close as possible to the pot temperature, and the bottom surface of the pot placed on the heating plate is provided with a cross-sectional shape that fits into the heating plate unevenness. A concave and convex portion is formed, and the side walls of both concave and convex portions are brought into close contact with each other.
- An electric cooker characterized in that the heating plate is equipped with a roller heat-sensitive rod.