JPS6332651Y2 - - Google Patents

Description

[Detailed description of the invention] This invention consists of a ring-shaped heater, an inner pot that is placed directly on the ring-shaped heater, a heat controller that controls the energization rate of the heater, and an inner pot that is placed on the side of the inner pot. This invention relates to a round electric cooker equipped with a thermostat that detects excessive temperature rise in the cooker.

Conventionally, electric pots have generally been round in shape for ease of use, and for example, there is a ring-shaped heater 2 as shown in FIG. In such an electric pot, when an attempt is made to construct a heat control type electric pot using a heat power controller, as is clear from FIG. be strongly influenced. The firepower controller 5 includes a bimetal 1 disposed inside as shown in FIG.
Since the opening and closing of the contact 11 is controlled by the indirect heater 12 installed near the ring-shaped heater 2, if this bimetal 10 is affected by the heat from the ring-shaped heater 2, normal thermal control will not be possible. There were flaws.

In addition, in the case of an electric pot that uses a thermal power controller, if the inner pot is heated over high heat when it is empty, the inner pot temperature will become quite high, leading to phenomena such as deformation of the inner pot.
Therefore, it is necessary to install a thermostat on the side of the inner pot to detect the excessive temperature rise in the inner pot, but even in this case, the inner pot 4 is set at a position slightly offset from the heater 2 as shown in FIG. And if the positional deviation is as shown in the diagram, the radiant heat at part A in the diagram becomes strong, and even under normal usage conditions,
There was a drawback that the thermostat 5 was activated and power could not be applied for a while (until the thermostat cooled down).

The present invention is an attempt to solve the above-mentioned drawbacks and commercialize a heat-controlled electric pot.

Hereinafter, specific embodiments of the present invention will be described based on the drawings.

1 in Fig. 1 and Fig. 2 showing the configuration of the present invention.
2 is the main body, and 2 is the receiving plate 3 which also serves as a heat plate inside.
4 is a detachable inner pot placed on this heater; 5 is a thermal power controller that changes the energization rate of the heater 2;
6 is a thermostat located on the side of the inner pot for preventing an excessive rise in temperature of the inner pot. The firepower controller 5 is built into the front panel 7 of the main body 1, and can be operated using a dial 8. The thermostat 6 is provided inside the main body 1 directly above the heat power controller 5, and is covered with an aluminum cover to protect it from being hit when setting the 4 inner pots. Particularly, in the present invention, the bare sheathed heater has a ring-like shape, and the front portion corresponding to the thermal power controller 5 and thermostat 6 is recessed, and a recessed portion 20 is formed. Fig. 3 shows the circuit configuration of this electric pot.The thermal power controller 5 is composed of a contact 9 serving as a main switch, a contact 11 that opens and closes with a bimetal 10, an indirect heater 12 that heats the bimetal 10, and a contact 9 and the bimetal 10 are operated by a cam 13 that is linked to the rotation of the dial 8. Heater 2 and thermostat 6 are connected in series and thermal power controller 5
Connected to power via. Also, although it is not clear in this circuit diagram, in the thermal power controller 5, the gap between the bimetal 10 and the contact 11 can be freely changed depending on the shape of the cam 13, and at a certain rotation angle, the bimetal 10 is locked and the contact remains closed. It's becoming like that.

The present invention has the configuration as described above, and its operation is as follows. By rotating the dial 8, the cam 13 closes the contact and also closes the contact 11 via the bimetal 10. As a result, the heater 2 is energized and cooking starts. In this case, if the rotational position of the dial 8 is set to the position where the bimetal 10 is locked as described above, the heater 2
is continuously energized, and at the beginning of cooking such as simmered food, it quickly reaches a boiling state. After this, when the dial 8 is operated again to set the bimetal 10 in the unlocked state, the indirect heater 13 near the bimetal 10 is generating heat, so the bimetal 10 bends and opens the contact 11, which causes the temporary heater 2 to open. Stop energizing. Further, at this time, since the energization of the indirect heater 13 is also stopped, the bimetal 10 cools down and the contact 11 is closed again, and energization of the heater 2 is started. After that, this ON-OFF operation is repeated. Further, since the gap between the bimetal 10 and the contact 11 can be changed depending on the rotational set position of the dial 8, the ON-OFF interval can be changed as shown in FIG. This changes the energization rate of the heater, allowing you to control the firepower. On the other hand, the thermostat 6 operates when the inner pot is empty and the electricity is turned on, or when the water in the inner pot runs out during cooking, because the temperature of the inner pot increases rapidly.

The present invention is as described above, and since it has a configuration in which a part of the ring-shaped heater is recessed and a thermal power controller and thermostat are provided corresponding to this part, the radiant heat of the part corresponding to this recessed part is reduced, and the thermal power is reduced. The thermal influence on the controller can be reduced, and even if the inner pot is displaced, there is no heater in section A, so the above-mentioned problem of malfunction can be solved. Furthermore, by recessing a part of the ring-shaped heater as in the present invention, the overall length of the heater can be lengthened.In particular, with heaters such as naked sheathed heaters, the wattage density on the surface greatly affects the heater life. It is also advantageous.

The above configuration makes it possible for the first time to commercialize a heat-controlled electric pot, which is of great practical value.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of an electric pot showing an embodiment of the present invention, Fig. 2 is a plan view with the inner pot removed, and Fig. 3 is a sectional view of an electric pot showing an embodiment of the present invention.
4 is an explanatory diagram of the operation of the thermal power controller, FIG. 5 is a sectional view of a conventional product, and FIG. 6 is a plan view of FIG. 5 with the inner pot removed. 2...Heater, 4...Inner pot, 5...Firepower controller, 6...Thermostat, 20...
recessed part.

Claims (1)

[Scope of utility model registration request] An electric pot that is equipped with an inner pot that is placed directly on a ring-shaped heater, a heat power controller that controls the energization rate of the heater, and a thermostat that is located on the side of the inner pot and detects excessive temperature rises in the inner pot. An electric pot characterized in that a recess 20 is provided in a part of the ring-shaped heater 2, and the thermal power controller 5 and thermostat 6 are arranged at positions corresponding to the recess 20.