JPH0580885B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a rice cooker for general household use.

BACKGROUND ART A conventional rice cooker of this type had a configuration as shown in FIG. That is, the rice cooking operation is controlled by the control means 1, and the rice cooking operation is performed by the rice cooking means 2 based on the output of the control means 1. Further, the display means 3 displays the rice cooking operation currently being performed by the rice cooking means 2, and the display driving means 4 outputs information on the rice cooking operation to the display means 3 according to the output of the control means 1. The temperature setting means 5 sets the temperature during rice cooking operation, and detects the temperature inside the rice cooker with a temperature detection means 6, and compares the output of the temperature detection means 6 with the output of the temperature setting means 5. 7, when the temperature inside the rice cooker reaches the temperature set by the temperature setting means 5, an output is made to the control means 1 to stop the rice cooking operation.

Problems to be Solved by the Invention In such a conventional configuration, the temperature at which the rice cooking heater is turned on and off is constant and cannot be changed freely by the user, resulting in a constant rice cooking quality. There was a problem in that the result of cooking rice could not be matched to the user's preference.

The present invention solves these problems,
The purpose is to allow the user to adjust the quality of rice cooking according to the user's preference.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention allows the setting of the temperature, which greatly affects the quality of rice cooking, to be freely variable.

Function: With the above configuration, the user can freely change only the temperature, which has a large effect on the quality of rice cooking, according to the user's preference, so that the user can cook rice according to the user's preference. It is.

Embodiment Hereinafter, an embodiment of the present invention will be described based on FIGS. 1 to 3.

FIG. 1 shows a block diagram of a rice cooker according to an embodiment of the present invention, in which reference numeral 11 denotes a rice cooking means for performing a rice cooking operation, 12 a control means for controlling the rice cooking means, and 13 a means for notifying information about the rice cooking operation. This is a display means using a display element. 14 is display means 13
15 is a temperature setting means, which can set two or more operating temperatures during rice cooking operation, and temperature variable means 1.
6, the temperature of one of the points can be varied. Reference numeral 17 is a temperature detection means capable of detecting the temperature inside the rice cooker, and reference numeral 18 is a temperature detection means that can detect the temperature inside the rice cooker. The rice cooking means 11 is controlled by outputting to the control means 12 that one rice has been reached. Further, the control means 12 provides the temperature setting means 15 with a signal for selecting a temperature to be compared from two or more temperatures that can be set by the temperature setting means 15. Thereby, the temperature setting means 15 sets the selected temperature.

FIG. 2 shows a circuit diagram of an embodiment of the present invention, in which 10 is a commercial power source, and the rice cooking means 11 includes a rice cooking heater 11a, a relay contact 11b which is a switch for this rice cooking heater 11a, relay coil 1
1c. Said relay coil 1
1c is energized and controlled by the control means 12 to open and close the relay contact 11b. As a result, current flows from the commercial power source 10, so the rice cooking heater 11
A is energized and controlled to perform the rice cooking operation. On the other hand, information on the rice cooking operation from the control means 12 is displayed on the display means 13 by the display drive means 14. The display means 13 includes a rice cooking process display 13a, a timer time display 13b, and a rice cooking menu display 13c. The rice cooking process display 13a displays characters corresponding to each of the pre-cooking process, the finishing process, and the additional cooking process of the rice cooking operation. The timer time display 13b displays how many hours later the rice cooking will end, and the rice cooking menu display 13c displays what menu is currently being used. 17a is a thermistor, and this thermistor 1
7a has a resistance that changes depending on the temperature, and when the temperature inside the rice cooker changes, the voltage input to the temperature comparison means 18 changes depending on the resistance values of the thermistor 17a and the resistor 17b.

FIG _. 3 shows a temperature curve during rice cooking, and in each step, the resistor ₁₅ constituting the temperature setting means in FIG.
The resistance values of a, 15b, 15c, 15d and the semi-fixed resistor 16 are set. Now, in order to determine whether the temperature inside the rice cooker is higher or lower than θ ₁ , the control means 12 sets the output point A of the temperature setting means 15 to the ground level, and sets the output points B and C to the open state. Here, in order to match θ ₁ , the resistance values of resistors 15a and 15c are set so that the voltage resulting from the resistance value division of the thermistor 17a and resistor 17b at the temperature of θ ₁ is equal to the voltage resulting from the resistance value division of resistors 15a and 15c. is set. Similarly, to determine whether the temperature inside the rice cooker is higher or lower than θ ₂ ,
The control means 12 opens the output points A and C of the temperature setting means 15, sets the output point B to the ground level, and determines whether it is higher or lower than θ ₃ by:
Set output points A and B to open state, and set output point C to ground level. Therefore, at θ ₂ , the resistance is 15
The resistance values of a and 15d, at θ ₃ , the resistance 15a
15b and the resistance value of the semi-fixed resistor 16 are set.

During the rice cooking operation, the resistors 17a and 17 are always connected.
The voltage from b and the voltage from the temperature setting means 15 are compared by the temperature comparison means 18, and when the voltages are the same, the voltage is output to the control means 12 to proceed with the rice cooking process. Further, in the cooking process, when the voltage from the thermistor 17a and the resistor 17b becomes equal to the voltage from the resistors 15a and 15b, the process moves from the cooking process to the additional cooking process. The temperature of θ ₃ at this time is greatly related to the degree of charring of the rice; the higher the temperature of θ ₃ , the more the degree of charring, while the lower the temperature of θ ₃ , the lower the degree of charring. It becomes less. When increasing the temperature of θ ₃ , adjust the temperature variable means 16 to increase the temperature of the resistor 1.
When increasing the series combined resistance value of 5b and the temperature variable means 16, and conversely decreasing θ ₃ , the series combined resistance value is made small. Further, the temperature variable means 16 is set at the center when the product is shipped, and by varying the temperature according to the user's preference, the rice can be prepared according to the user's preference.

Effects of the Invention As described above, according to the present invention, since the temperature variable means is provided which can freely vary the temperature of some points out of two or more points set by the temperature setting means, the user can This allows the user to freely change only the temperature, which has a large effect on the quality of the rice, according to the user's preference, and as a result, it is possible to prepare rice according to the user's preference.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a rice cooker showing an embodiment of the present invention, Fig. 2 is a circuit diagram of the same rice cooker, Fig. 3 is a characteristic diagram showing a temperature curve during rice cooking, and Fig. 4 is a conventional rice cooker. FIG. 11... Rice cooking means, 12... Control means, 13...
...display means, 14...display drive means, 15...temperature setting means, 16...temperature variable means, 17...temperature detection means, 18...temperature comparison means.

Claims (1)

[Claims] 1. A rice cooking means consisting of a rice cooking heater and a switch for the rice cooking heater, a control means for controlling the rice cooking means, a display means for displaying the operation being performed by the rice cooking means, and an output of the control means. a display drive means for displaying information on the display means; a temperature setting means capable of setting two or more temperatures during rice cooking;
A temperature detection means for detecting the temperature inside the rice cooker, and a temperature that compares the output of the temperature setting means with the output of the temperature detection means and outputs to the control means that the inside of the rice cooker has reached a certain temperature. A rice cooker comprising a comparing means, and a temperature variable means that can freely vary the temperature of some of the two or more temperatures set by the temperature setting means.