JPS6237293B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronically controlled cooking appliance with at least two timers.

Recent electronically controlled cookers, such as microwave ovens, have a first timer that sets a first heating time for microwave heating, a second timer that sets a second heating time for heater heating, and a second timer that sets a second heating time for heater heating. , comprising a control means for controlling heating based on the first and second heating times set by the second timer, and when both the first and second heating times are set by the first and second timers, , for example, under the control of the control means, the first
A system has been devised in which microwave heating is performed preferentially during a heating period, and after the heating is completed, heater heating is continuously performed during the second heating period.

In such a microwave oven, if you mistakenly set the first heating time before completing the heater heating by setting the second heating time, the heater heating is interrupted midway and the microwave heating by the first heating time is started first. After execution, the interrupted heater heating is continued, resulting in undesired heating.

The present invention has been made in view of these points, and embodiments of the present invention will be described in detail below with respect to a microwave oven.

In FIG. 1, 1 is a microwave oven body in which a heating chamber (not shown) for storing food is arranged; 2
3 is a door that opens and closes the front opening of the heating chamber, and 3 is an operation panel. Figure 2 shows details of the panel, 4
6 is the first timer knob of the first timer section 5 that sets the heating time for microwave heating, and 6 is the second timer knob of the second timer section 7 that sets the heating time for heater heating. 1. The second timer knobs 4 and 6 are provided with instruction sections 8 and 9, respectively. When the instruction parts 8 and 9 turn the first and second timer knobs 4 and 6 clockwise to instruct a desired number, the first and second timer parts 5 and 7 respectively perform the desired heating. The time is set. The first and second timer knobs 4 and 6 are rotated counterclockwise by driving of first and second timer motors (described later), respectively. 10 is a push button for starting cooking.

FIG. 3 shows the circuit of the microwave oven, and 11 is a control means for controlling the microwave oven, that is, a microcomputer (hereinafter referred to as μCOM).
COM has flag F, etc. 12 is a first heating means or magnetron that oscillates microwaves for heating the food; 13 is a second heating means or heater for heating the food; 14 is a commercial power source; and 15 is a microwave signal from the μCOM 11. 16 is a heater drive unit that generates heat in the heater 13 based on the heater signal H from the μCOM 11; 17 and 18 are first and second timer motors 1 corresponding to the first and second timer sections 5 and 7, respectively;
9 and 20 are first and second relay coils that are excited based on timer signals T1 and T2 from the μCOM 11, respectively; 21 and 22 are first and second relay coils that are energized by the excitation of the first and second relay coils, respectively; , the first and second timer motors 17 and 1 are turned on by turning on the first and second relay switches.
8 is driven. 23 and 24 are first and second timer switches that are turned off when the instruction parts 8 and 9 of the first and second timer knobs 4 and 6 return to the O position, respectively; 25 is a cooking switch that is turned on when the push button 10 is pressed; A start switch 26 is a door switch that is turned on when the door 2 is closed.

Next, the operation of the microwave oven is shown in FIG.
The details will be explained based on the flowchart of the COM11 program.

Normally, the program remains in the S1 slap unless the cooking start switch 25 is turned on.

Therefore, when heating with a heater for 5 minutes after 10 minutes of microwave heating, food is first placed in the heating chamber, door 2 is closed, and the first and second
Turn timer knobs 4 and 6 to set the desired heating time 10 respectively.
Set minutes and 5 minutes. Then, door switch 2
6 and the first and second timer switches 23 and 24 are turned on. When the push button 10 is pressed, the cooking start switch 25 is turned on, and the program advances from step S1 to step S2. In this step, it is determined whether or not the door switch 26 is on. Since the door switch 26 is on, the program reaches step S3 (the first means of the present invention). In this step, it is determined whether or not the first timer switch 23 is on.
The first timer switch 23 is on, so
Proceed to step S4 (continuation means of the present invention). In this step, it is determined whether 1 has been written in the flag F in the μCOM 11, but in this case, since the content of the flag F is 0, the process then proceeds to step S5. In this step, the microwave signal M and the timer signal T1 are output, so that microwave heating is started and at the same time driving of the first timer motor 17 is started. Then, the program returns to step S2 and thereafter cycles through steps S2 to S5 unless the microwave heating time of 10 minutes has elapsed, that is, unless the first timer switch 23 is turned off.

When the first timer switch 23 is turned off, the program exits this circular state at step S3 and reaches step S6. In this step, output of the microwave signal M and timer signal T1 is stopped, and microwave heating and driving of the first timer motor 17 are stopped. In the following step S7 (second means of the present invention), it is determined whether or not the second timer switch 24 is on, but since the second timer switch 24 is already on, the program continues with steps S8 and S9. Proceed to each step. In step S8, 1 is written in the flag F, and in step S9, the heater signal H and timer signal T2 are output, so that heater heating is started and at the same time driving of the second timer motor 18 is started. Then, the program returns to step S2 and then the heater heating time is 5.
Unless the second timer switch 2 has elapsed, that is, the second timer
Steps S2, S3, and S6 to S9 are cycled until step 4 is turned off.

When the second timer switch 24 is turned off, the program exits this cyclical state at step S7 and reaches step S10. In this step, output of the heater signal H and timer signal T2 is stopped, and heating of the heater and driving of the second timer motor 18 are stopped. Thus, 10 minutes of microwave heating was performed preferentially, and after the heating was completed, 5 minutes of heater heating was performed. Further, in step S10, flag F is cleared. The program then
Step S1 is entered to prepare for detecting the ON state of the cooking start switch 25 for starting the next cooking.

Now, while heating the heater for the above cooking, that is,
During the circulation of steps S2, S3, S6 to S9, even if an undesired time is set due to undesired rotation of the first timer knob 4 and the first timer switch 23 is turned on,
Such time is ignored and becomes invalid, so that heater heating is not interrupted midway and microwave heating is not prioritized. That is, in this case, the program exits the cycle of S2, S3, and S6 to S9 at step S3 and reaches step S4, but since 1 has already been written to flag F at step S8 during the cycle, The process does not reach the S5 step, but immediately moves from the S7 step to the S9 step. And from then on, S2 to S4,
The steps S7 to S9 are cycled, and therefore the heater heating continues. After the heater heating is completed, the program then enters step S1 to prepare for detecting the ON state of the cooking start switch 25 to start the next cooking.

Also, during the heater heating of the above cooking, that is, S2,
When door 2 is opened during the cycle of steps S3, S6 to S9, the program exits the cycle at step S2 and reaches step S11. In this step, microwave signal M, heater signal H, timer signal T1,
All outputs of T2 are stopped, and in this case, heater heating and driving of the second timer motor 18 are stopped. Furthermore, microwave heating and first timer motor 1
7 has already stopped. The program then enters the S1 step. In this state, after the first timer switch 23 is turned on due to the undesired rotation of the first timer knob 4, the door 2 is closed again and the cooking start switch 25 is turned on. Then, the program goes from step S1 through steps S2 and S3 to step S4, but since 1 has already been written to flag F at step S8, it goes to steps S7 to S9 in the same way as described above, and from then on S2
Cycle through ~S4, S7~S9 steps. Therefore, in this case as well, heating by the heater continues.

Thus, according to the present invention, when both the first and second timers are set, heating control (for example, microwave heating control) based on the time by the first timer is performed preferentially, and then 2nd above
In an electronically controlled cooking appliance that performs time-based heating control (e.g. heater heating control) using a timer, if the time is set using the first timer during time-based heating control using the second timer. , because the setting is invalidated and the second timer is then forced to continue the heating control based on the time, the first timer is used to set the time while the second timer is performing the heating control based on the time. Even if this is done by mistake, it is possible to prevent future undesired heating based on the incorrectly set time from being performed.

[Brief explanation of the drawing]

The figures show a microwave oven according to an embodiment of the present invention; FIG. 1 is a front view, FIG. 2 is a front view of an operation panel, FIG. 3 is a circuit diagram, and FIG. 4 is a flowchart of a microcomputer program. 5...first timer section, 7...second timer section, 11...
Microcomputer, 12...Magnetron, 1
3... Heater.

Claims (1)

[Claims] 1 a first heating means, a second heating means, a first timer for setting the heating time by the first heating means, a second timer for setting the heating time by the second heating means, the first , comprising control means for driving and controlling the first and second heating means based on the time set by the second timer, the control means driving and controlling the respective times by the first and second timers. At times, when the first means for preferentially driving and controlling the first heating means based on the time set by the first timer and the respective times are set by the first and second timers, the above-mentioned a second means for controlling the drive of the second heating means based on the time set by the second timer after the preferential drive control;
An electronically controlled cooking appliance characterized by comprising: a continuation means that invalidates the time setting when a time is set by a timer, and thereafter causes only the continuation of the drive control of the second heating means.