JPS5924813B2 - rice cooker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rice cooker, and particularly aims to provide a rice cooker that always cooks delicious rice by adjusting the heat power according to the amount of rice cooked.

Generally, in order to cook delicious rice, it is known that it is better to increase the amount of heat in the middle of cooking, as it is said to ``begin at a slow and slow pace.''

To realize this rice cooking method, a rice cooker has been proposed that uses a heat-responsive device to detect the rice cooking temperature and thereby increases the amount of heating from the middle of rice cooking.

This conventional rice cooker is effective when the amount of rice cooked is constant, but if the amount of rice cooked varies, it is not possible to cook delicious rice. The present invention eliminates the drawbacks of the conventional rice cooker described above, and embodiments of the present invention will be described below with reference to the accompanying drawings. First, an outline of this embodiment will be explained with reference to FIG. 1. 1 is a heating means for heating a rice cooking container, 2 is a heating amount control means for controlling the amount of heating by the heating means 1, and 3 is a heating means for heating the rice stored in the rice cooking container. and water, and 4 is a temperature detecting means that detects the temperature of the rice cooking container.

The operation will be briefly explained below.

When the rice cooking container is heated by the heating means 1 and the temperature of the rice cooking container reaches a predetermined temperature, for example, 65°C, the temperature detection means 3
detects the temperature of the rice cooking container, and operates the heating amount control means 2 based on the output of the temperature detection means 3.

By this operation of the heating amount control means 2, the heating amount by the heating means 1 increases to the heating amount set by the rice cooking amount detection means 3. Next, the specific configuration of this embodiment will be explained with reference to FIGS. 2 and 3.

In FIG. 2, 5 is an AC power supply, and this AC power supply 5
A first heater 7 is connected to the rice cooker via a rice cooking switch 6, and a second heater 9 is connected to both ends of the heater 7 via a normally open temperature switch 8 and a thyristor 10.

A trigger circuit including a trigger element 11, a variable resistor 12, and a capacitor 13 is added to the thyristor 10. Here, the rice cooking switch 6 is a switch that is manually set to be always open and is automatically opened when rice cooking is completed. In addition, the variable resistor 12 has a resistance value that changes depending on the amount of rice cooked.
In this case, the resistance value is made smaller when the amount of rice to be cooked is large. As shown in FIG.
A lever 18 that can freely slide up and down is interposed between the bottom surface of the
This is implemented like a variable resistor 19 whose slider is driven by the variable resistor 19. Needless to explain, the lever 18 slides up and down depending on the amount of rice cooked, and the resistance value of the variable resistor 19 changes. Here, although the heating means is not shown, it is provided facing the bottom surface of the container 15. When the rice cooking switch 6 is turned on with the above configuration, the rice cooking container is initially heated by the first heater 7, but when the temperature of the container reaches around the gelatinization start temperature of rice, for example 65 degrees Celsius, the temperature increases. The temperature switch 8 provided to detect the temperature is closed, and the amount of heating by the second heater 9 is increased.

The amount of heating by the second heater 9 is determined by the conduction angle of the thyristor 10, and this conduction angle is influenced by the variable resistor 12. That is, the second heater 9 provides a heating amount depending on the amount of cooked rice. The first heater 7 is selected to have a lower power value than the second heater 9, and therefore the total power value of the second heater 9 and the first heater 7 also has a value that roughly corresponds to the amount of rice cooked. . Next, another embodiment will be described with reference to FIG. This embodiment is different from the embodiment shown in FIG.
The difference is that there is only one heater. Therefore, the rice cooker switch 6', temperature switch 8', triax 10', trigger element 1'', variable resistor 12'', and capacitor 13'' are as follows.
Each has the same function as the one implemented in FIG. 2, and a new resistor 14 is added, and the heater r
is connected to a heater whose power value is the sum of the power values of the first heater 7 and the second heater 9 shown in FIG. In the above configuration, when the rice cooking switch 6' is closed, the thyristor 10' is fired at an firing angle corresponding to a time constant determined by the resistance value of the resistor 14 and the capacitance value of the capacitor 13'', and the heater 7'' is fired at this time. It is energized by , and starts to wobbling at low power. When the temperature of the container rises, the temperature switch 8'' closes.As a result, the time constant circuit described above is modified to a combined resistance of the resistor 14 and the variable resistor 12', so that the time constant becomes smaller. The firing angle of the thyristor 105 advances by that amount, the conduction angle becomes stronger, and the amount of energization increases.The amount of energization is determined by the resistance value of the variable resistor, and this resistance value is determined by the amount of rice cooked as described above. Since the rice cooker of the present invention is compatible with the conventional method, the rice cooker of the present invention uses a high power according to the amount of rice cooked, and the so-called "middle-cutting" starts. , a means for controlling the amount of heating according to the signal from the rice cooking amount detection means is added, and the heating means is operated with the amount of heating according to the amount of rice cooked by the operation of the temperature switch, so the amount of heating in the conventional method is too large. Not only does it eliminate the drawbacks of not being able to cook rice due to rice being too small or too small, but it also makes it possible to cook extremely small amounts of rice, which was difficult in the past. be.

[Brief explanation of the drawing]

Fig. 1 is a system block diagram of a rice cooker showing an embodiment of the present invention, Fig. 2 is an electric circuit diagram of the rice cooker, Fig. 3 is a sectional view of essential parts of the rice cooker, and Fig. 4 is a system block diagram of the rice cooker according to the present invention. It is an electric circuit diagram of the rice cooker which shows another Example. 1... Heating means, 2... Heating amount control means, 3... Temperature detection means, 4... Rice cooking amount detection means.

Claims (1)

[Claims] 1. A rice cooking container, a heating means for heating the rice cooking container,
a temperature detection means for detecting the temperature of the rice cooking container; a rice cooking amount detection means for detecting the amount of cooked rice consisting of rice and water stored in the rice cooking container; and a heating amount control means for controlling the amount of heating by the heating means. When the rice cooking container reaches a predetermined temperature, the heating amount control means is actuated by the output of the temperature detection means, and the heating amount by the heating means is controlled by the rice cooking amount detection. A rice cooker characterized by increasing the value to a set value by means.