JPS638376B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heating panel used in electric stoves, etc., and its purpose is to accurately control the temperature of a cooking container and improve cooking performance in boiling and grilling. be.

In recent years, this type of heating panel has been developed to accommodate multiple heating elements in one panel, and to selectively generate heat at the outer and inner peripheries. There is a strong desire to be able to heat objects from small diameters to small diameter objects in an optimal state. Various heating plates have been proposed to meet this demand, but the most important characteristic of this kind of heating plate is how to accurately control the heating temperature and obtain good cooked food. I haven't seen a solution to this yet. The heating temperature control section generally consists of a temperature sensing section and a control section, and in consideration of ease of control and economic efficiency, the temperature sensing section is closely attached to a part of the bottom of the container and a single controller is used. In many cases, an arbitrary temperature was set and controlled using an adjustment knob or the like connected to this controller. Furthermore, in order to represent the temperature of the container, the temperature sensor is often installed in the center of the container, but this method has the drawback that the control temperature is significantly different between large and small diameter containers as mentioned above. .
For example, to explain specifically when grilling meat, it is usually desirable to control the grilling surface temperature to around 200℃, but if you set it to 200℃ when using a large container, it will be controlled at a low temperature of around 140℃ when using a small container. However, there were drawbacks that made it unsuitable for practical use. In addition, the above drawbacks can be corrected by setting the temperature for each container by operating the temperature control knob, etc., but in this case, in practice, there are many types of containers, and the operation becomes extremely complicated. was.

The present invention solves the above-mentioned conventional drawbacks, and embodiments of the present invention will be described below with reference to the accompanying drawings.

In Figures 1 and 2, 1 is a heat generating board;
It is equipped with an outer heat generating part 2, an inner heat generating part 3, and corresponding heat generating elements 4, 5, 6, 7, 8, 9, and is made of aluminum or iron casting, etc., and its upper surface is in close contact with the cooking container. It has a smooth finish to make it look good. Further, a temperature sensing section 10 is provided in the center, and a U-shaped groove 11 for positioning the container is provided near the outer periphery. Next, the state of heat transfer and temperature sensing when heating a container using this type of heating plate 1 will be explained with reference to FIGS. 3, 4, and 5. Figures 3 and 4 show the situation with the conventional configuration;
The figure shows the case where the small container 12 is heated, and FIG. 4 shows the case where the large container 13 is heated. First, when the small container 12 is heated, the heating elements 6, 7, 8, and 9 are energized, and the temperature sensor 10 receives the heat A (see arrow) conducted through the bottom of the container 12 and the heat conducted inside the heating plate 1. Heat B (see arrow) is supplied. Therefore, the temperature of the temperature sensing part 10 rises due to both of them, and the electricity supply stops at a predetermined set temperature, but as the temperature of the temperature sensing part 10 decreases, it is heated again.
is maintained at a constant temperature. This situation is shown in graph 14 of FIG. Next, the case where the large container 13 is heated will be explained with reference to FIG. In this case, the heating elements 4 and 5 are energized and heat A (as seen by the arrow) is supplied to the temperature sensing section 10 in substantially the same manner as described above.
The heat B conducted inside the heating plate 1 is extremely small compared to the case of the small container, and the overall amount of heat supplied to the temperature sensing section 10 is significantly reduced, so that even though the temperature of the container 13 rises, electricity is not supplied. This causes a phenomenon that cannot be stopped.
As a result, as shown in graph 15 in FIG. 6, the container temperature tends to become much higher than in the case of the small container 12. FIG. 5 is an embodiment of the present invention, and this figure shows a state in which the large container 13 is being heated. This shows that in addition to the outer heating elements 4 and 5, the heating elements 9 and 7 near the temperature sensing section are energized in an auxiliary manner. In this case, heat A and heat B are supplied to the temperature sensing section 10 in a manner similar to the case of the small container 12. Therefore, the container temperature can be controlled at approximately the same temperature as in the case of a small container, as shown in graph 16 of FIG.

As is clear from the above explanation, according to the present invention, it is possible to provide a heating plate with extremely excellent temperature controllability regardless of the size of the container, and along with this, practical baking performance and temperature setting operability are greatly improved. It is possible to improve this.

Although the above-mentioned heating element is concentric, it may be formed in a double or triple spiral shape, and various heating elements such as a sheathed heater type, an embedded type, and a space type may be used. The same effect can be produced even if Furthermore, it is possible to freely select the power capacity distribution between the heating element near the temperature sensitive part and the outer peripheral heating element.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a heat-generating plate showing an embodiment of the present invention, FIG. 2 is a half-cut plan view of the heat-generating part, and FIG.
4 is a cross-sectional view showing a state in which a container is placed on a conventional heating plate, FIG. 5 is a cross-sectional view showing a state in which a container is placed on a heat generating plate showing an embodiment of the present invention, and FIG.
The figure is a diagram showing the control state of the container temperature. 1...Heating plate, 2...Outer heat generating part, 3...Inner heat generating part, 4, 5...Outer heat generating element, 6, 7, 8, 9
...Inner heating element, 10...Temperature sensing section.

Claims (1)

[Claims] 1 Equipped with a heating element that can be selectively energized on the outer and inner periphery, and a temperature sensing part for temperature adjustment approximately in the center, and when it is selected to energize the outer periphery heating element, the outer periphery A heating panel characterized in that it is possible to conduct electricity to a heating element in the inner peripheral part and a heating element in the vicinity of a temperature sensing part in the inner peripheral part.