JPS61191317A - Rice cooker - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a large rice cooker capable of performing so-called timer rice cooking.

[Technical background of the invention and its problems] For example, in a rice cooker equipped with a rice cooking control circuit consisting of a microcomputer, a so-called timer is used to complete the rice cooking operation after a desired time using a timing function provided to the microcomputer. There are some that allow you to cook rice. Conventionally, this device has been generally configured to set a desired standby time by operating a standby time setting switch, and to start the rice cooking operation after the standby time has elapsed. However, with this configuration, the user first calculates the rice cooking start time by subtracting the time required for rice cooking from the desired rice cooking time, then calculates the waiting time by subtracting the current time from the rice cooking start time, and calculates the waiting time. microcomputer
It is quite troublesome because you have to set it to . Therefore, recently, when the user sets the current time and the desired time for rice to be cooked, a microcomputer calculates the required waiting time based on both times, and starts the rice cooking operation after the waiting time has elapsed. It is being considered that

However, even with the above configuration, after the microcomputer calculates the Samurai time based on the set times and starts its timing operation, if the cancel switch is operated to change the desired cooking time, the microcomputer Since the computer returns to the reset state, there is a problem in that both the current time and the desired cooking time must be set again.

[Object of the Invention] An object of the present invention is to provide a rice cooker that allows easy setting of timer rice cooking and also allows easy change of time once set.

[Summary of the invention]

In the present invention, the rice cooking control circuit is configured to store a set current time and a desired time for rice to be cooked, and each of the times stored when a cancellation signal is given while measuring a waiting time calculated based on these two times. The present invention is characterized in that it is configured to display on the display device and to accept resetting of both times.

[Embodiment J of the invention - An embodiment will be described with reference to the drawings. First, in FIG. 2 showing the circuit configuration, reference numeral 1 denotes a microcomputer corresponding to a rice cooking control circuit, which has a timekeeping function using, for example, an AC power frequency. Reference numeral 2 denotes a display device, for example, a 4-digit, 7-segment type light emitting diode, and the cand side of each digit is connected to output terminals Re through R3 of the microcomputer 1 via an inverter circuit 3, respectively. A high level scan pulse is output to the multi-output terminals RO to R3 of the microcomputer 1, and the light emitting diode 2 is dynamically illuminated. 4 and 5 are a current time setting switch and a cooking time setting switch, both of which are self-reset type bush switches, and are connected to the output terminal Ro and input terminal of the microcomputer 1 through a diode 6 with the polarity shown, respectively. is connected between 1 and 2. 1 and 2 at each input terminal are always maintained at a low level by a pull-down resistor 7. 8 and 9 are the start switch and cancel switch,
These are also self-resetting type bush switches, and are connected between the output terminal R1 and the input terminals 1 and 2 of the microcomputer 1, respectively, via diodes 10 of the polarities shown. When the current time setting switch 4 is pressed, a high level pulse is input to the input terminal of the microcomputer 1, and the current time can be set in the microcomputer 1 according to the pressing time or the number of times the switch is pressed. , the time is displayed on the light emitting diode 2. On the other hand, when the cooking time setting switch 5 is pressed, a high level pulse is input to the input terminal 2 of the microcomputer 1, and the desired cooking time is set in the microcomputer 1 according to the pressing time or the number of times the button is pressed. The time can be displayed on the light emitting diode 2 instead of the current time. As described above, the current time and the desired cooking time are stored in the microcomputer-1.
When the start switch 8 is turned on, the microcomputer 1 calculates the time difference between the desired rice cooking time and the current time according to a preset timer rice cooking program, and determines the rice cooking operation based on the time difference. A waiting time is calculated by subtracting the time required for completion, and timer rice cooking is executed to start the rice cooking operation after the waiting time has elapsed. The rice cooking operation is performed by turning off the power to a rice cooking heater (not shown) while detecting the temperature of the pot, according to a well-known rice cooking program preset in the microcomputer-1.

Now, the microcomputer 1 has a built-in time adjustment program as shown in the flowchart of FIG. 1, which will be described in detail below. First, when the current time setting switch 4 and the cooking time setting switch 5 are operated, the desired cooking time and the current time are set and displayed on the light emitting diode 2, as shown in processing area A in the same figure. and both times are stored. Here, the current time is 22
3 and 4 show the display mode of the light emitting diode 2 when the desired cooking time is set as 6:30. Next, when the start switch 8 is operated, it is determined in step a whether or not there is an input to the start switch 8.
First, a subtraction process is performed in which the current time is subtracted from the desired cooking time to calculate the time difference between them (step b), and then the time difference, that is, the remaining time until the cooking is finished, is displayed on the light emitting diode 2 (step C9 fifth (see figure), and a timing operation is started (step d). The remaining time, which decreases as the timekeeping operation progresses, is sequentially displayed on the light emitting diode 2 (see FIG. 6). In this way, by operating the start switch 8, the microcomputer-1
If the desired cooking time is to be changed to, for example, 5:30 within a predetermined time of, for example, about 5 minutes after starting the timing operation, the cancel switch 9 is operated. Then,
In step e, r Y, E S J, so
The timing operation is stopped, the desired cooking time stored in memory is read out, and the same time is displayed on the light emitting diode 2 (
Step f, see Figure 7) a Then, when the cooking time setting switch 5 is operated, rYEs is set in step g.
J, the microcomputer 1 accepts the resetting of the desired cooking time, the same time is corrected (step h, see FIG. 8), and this time is stored again (step i).

After this, when the start switch 8 is operated again, the process returns to step a, and after the subtraction process, the remaining time until the rice is cooked is displayed again, and the timekeeping operation is restarted.

In addition, when correcting the current time, if the current time setting switch 4 is operated after operating the cancel switch 9, rNOJ is set at step g, and rYE is set at step j.
sJ, the stored current time is read out and displayed on the light emitting diode 2 (step k), and the current time is corrected according to the on time or number of times the current time setting switch 4 is pressed (step! ), and the corrected current time is stored again (step m). After that, the process returns to step a, and the remaining time until the rice is cooked is calculated and displayed based on the current time corrected by operating the start switch 8 (
(see FIG. 9), and the timing operation is restarted (see FIG. 10). On the other hand, if the cancel switch 9 is not operated within a predetermined time of, for example, about 5 minutes from the start of the timing operation based on the operation of the start switch 8, rYEsJ will occur in step n. The desired time is erased (step 0.p) and the timekeeping operation continues.

In the above embodiment, considering that the time is generally adjusted within a short time after the time is set, if the cancel switch 9 is not operated within 5 minutes after the start switch 8 is operated, both Although the memory of the time is erased, the present invention is not limited to this, and the memory may be retained for a longer time, or may be retained until the rice cooking operation is started.

[Effects of the Invention] As described above, the present invention allows timer rice cooking to be performed by setting the current time and the desired time of completion of cooking. It is configured so that when the desired cooking time and current time are memorized and a cancellation operation is performed, the time is displayed and the time can be reset, so if it becomes necessary to adjust the time after setting the time. However, it can be done extremely easily and has excellent effects.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a flowchart, Fig. 2 is a circuit diagram of the main part, and Figs. 3 to 10 show display modes of light emitting diodes associated with time setting and correction operations. FIG. 3 is a front view of the operating section shown in FIG. In the drawing, 1 is a microcomputer (rice cooking control circuit)
, 2 is a light emitting diode (display device), 4 is a current time setting switch, 5 is a cooking time setting switch, 8 is a start switch, and 9 is a cancel switch. Applicant Toshiba Corporation No. 2 Condolences No. 3 Figure 6 Figure 9 Figure jP1+o Figure

Claims (1)

[Claims] 1. The rice cooking control circuit is provided with a timing function, the waiting time is calculated based on the current time set in the rice cooking control circuit and the desired cooking time, and the rice cooking operation is started after the waiting time has elapsed. The rice cooking operation is completed at a desired upstream time, and the rice cooking control circuit includes:
The system is configured to store each of the set times, display the stored times on a display device when a cancellation operation is performed while counting the standby time, and accept resetting of both times. A rice cooker characterized by: