JPS6032449B2 - rice cooker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an electric rice cooker that can cook delicious rice with a high amount of heat in watts.

Generally, to cook delicious rice, it is best to heat it at high wattage (high heat) until it boils, and once it boils, continue to heat it for at least 20 minutes at a low heat that does not boil over or burn, then turn off and stir. things are known.

Conventional rice cookers heat at a fixed wattage, so if you use a high wattage, the rice will boil over or burn. Therefore, it is impossible to use a high wattage and it takes a long time to boil the rice, and the boiling time cannot be longer than 2 minutes, which makes it difficult to achieve suitable rice cooking conditions.

Therefore, the present invention focuses on the fact that the amount of heat given to the water in the pot is related to the temperature difference between the heating plate and the pot, and uses a heater with a high wattage compared to the rice cooking capacity, and increases the temperature inside the pot. The temperature of the heating plate is controlled at a high temperature until it almost boils, and a high amount of heat is supplied to the water in the pot, and when the temperature inside the pot reaches the temperature where it almost starts boiling, this temperature is sensed and the heating plate is activated. The solution is to control the temperature to a low temperature to prevent boiling over and scorching.

An embodiment of the present invention will be described below with reference to the drawings.
The main body 1 is provided with legs 2, and the inner bottom of the main body 1 is provided with a heating plate 4 equipped with a heater 3 of relatively high wattage, for example, 1000 W with 1.8 watts.

In the center of the heating plate 4, there is a heat-responsive switch 5 that can be retracted.
6 is provided, which utilizes the conventionally known Curie point of ferrite, and is configured so that it can be turned "ON" and "OFF" manually via a lever 9. Also, one of the heat-responsive switches 5 senses the bottom temperature of the pot 10 and turns off the power when the water 12 in the pot 10 placed on the heating plate 4 runs out and the rice 1 becomes rice and cooking is completed.
The other heat-responsive switch 6 similarly senses the bottom temperature of the pot 10 and is configured to turn off when the water 12 reaches approximately boiling temperature.

The heating panel 4 is equipped with automatic return type heat-responsive switches 7 and 8 that control the temperature of the heating panel 4. One of the heat-responsive switches 7, which controls the temperature of the heating panel 4, is set to a relatively high temperature at the beginning of rice cooking. This is a heat-responsive switch that controls the temperature of the heating plate 4.The other heat-response switch 8 starts operation in response to the heat-response switch 6 after the water boils. It is a heat-responsive switch that controls the temperature of the heating plate to a temperature that does not cause boiling over.

The wiring for these electrical parts is as shown in Figure 2.
The heat-responsive switch chamber, the heat-responsive switch 7, and the heat-response switch 7 are connected in series, and the heat-response switch 81 is connected in parallel. To explain the operation as follows, put the pot gun and rice turtle "Mizutomi 2" and set the heating plate on the motherboard.

Next, operate the lever g and turn the heat-responsive switch 86 to "O".
N”. This operation energizes the heater needle and raises the temperature of the heating plate. At this time, if the heater has a relatively high wattage of about 1000W, it will quickly reach point A to point A as shown in curve A shown in Figure 3, and after that, the heat-resistance switch 7 will operate to maintain a constant temperature. Maintain a constant temperature until the boiling point.At this time, the temperature of pot I (Mizutomi 2 in the pot neck
As shown in Figure 3, the temperature rises from point A and reaches the boiling temperature. At this time, the heat-responsive switch 8 responds by sensing the internal temperature of the hotpot Q and turns OFF, and the heat-responsive switch 8 and T form a series circuit. OFF", the temperature of the heating plate 4 decreases to the point A, and thereafter is controlled to a constant temperature up to the point A4. Pot 1 Rice inside the mouse - Fumatamizu turtle 2 Hamo from point B to B2
Even if you keep boiling until it reaches the point, if the water 12 runs out, the pot turtle becomes 0.
When the temperature rises and reaches point B3, the heat-responsive switch responds and turns OFF, cutting off electricity to the heater 3, and cooking is completed, resulting in an uneven state.

Also, to explain the amount of transmission during this time, from point A to A,,
The amount of heat received by pot turtle 0 between points A2 is related to the temperature by subtracting the temperature of the mouth curve from the A curve, and the amount of heat received is proportional to the temperature difference ~ From points A2 and A3 to the point between points A2 and A3, the temperature difference is t2. In other words, the temperature is set at an appropriate temperature that receives a proportional amount of heat, that is, the temperature at which the rice does not boil over and the rice does not boil over. The curve shown in the figure shows the pot temperature.

As explained above, according to the present invention, the time required for water to boil in the initial stage of rice cooking is shortened by high-wattage cooking, and after boiling, the temperature of the heating plate 4 is controlled to a low temperature using a heat-responsive switch, thereby preventing boiling over. Moreover, since the heat is so called low that it does not burn, it satisfies the above-mentioned cooking conditions for delicious rice.

In addition, in the present invention, since the rice is cooked at a high wattage, for example, if the contact between the heating plate 4 and the pot ID is not good, the temperature of the heating plate becomes abnormally high, resulting in a dangerous situation. 7 prevents the temperature of the heating plate 4 from rising above a certain period of time, making the rice cooker extremely safe.

[Brief explanation of drawings]

Figure 1 is a sectional view of the rice cooker of the present invention, and Figure 2 is its wiring diagram.
FIG. 3 is a diagram comparing the temperature characteristics of the present invention and the conventional rice cooker. 3...Heat 4 states...Heating panel 5, 6...Heat-responsive switch, completed, 8...Heat-responsive switch. Figure 2 Figure 3

Claims (1)

[Claims] 1 Equipped with a heating plate 4 having a heater 3 with a relatively high wattage compared to the rice cooking capacity, the heating plate 4 detects the temperature at the bottom of the pot 10 and turns off the power when the rice cooking is completed. A response switch 5 is provided, as well as a heat response switch 6 that senses the internal boiling temperature of the pot 10 and turns it off, and a plurality of heat response switches 7 and 8 with different operating temperatures that control the temperature of the heating plate 4. A rice cooker characterized in that one heat-responsive switch 8 is connected in parallel with a heat-responsive switch 6 that operates by sensing the boiling temperature.