JPH0771769A - Heating cooker - Google Patents

Abstract

PURPOSE:To ensure restarting of cooking only by closing a door in a certain effective time after the door is opened and the cooking is instantaneously interrupted by interrupting the cooking once door opening is detected and restarting the cooking once door closing is detected within a predetermined time after the detection of the door opening. CONSTITUTION:With a door opened in the course of cooking, a detection signal from door opening/closing detection means 13, i.e., a door switch is received by a microcomputer 11. The microcomputer 11 controls a high-frequency oscillation circuit 14 such that it interrupts oscillation of the high-frequency oscillation circuit 14 and hereby instantaneously interrupts the cooking. When the door is reclosed before the lapse of one minute after the door is opened, the microcomputer 11 detects the reclosing of the door and restarts the cooking which is instantaneously interrupted. Thus, heating cooking is performed until remaining cooking time is completed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooker such as a microwave oven controlled by a microcomputer, and more particularly to an improvement of a cooker controlled to stop cooking when a door is opened during cooking.

[0002]

2. Description of the Related Art Generally, in a cooking device such as a microwave oven, for example, when a cooking time is set and a door is opened in the middle of cooking after the cooking is started, JP-A-2-2761 is known.
As shown in Japanese Patent Publication No. 90, from the viewpoint of safety, the oscillating operation of the magnetron is interrupted and cooking is controlled to be temporarily stopped. Then, even if the door is closed after that, the temporary stop state is continued.

[0003]

By the way, in the case of cooking with a microwave oven, it is often the case that the door is opened during the cooking to confirm the finish, and it is necessary to continue the cooking because it is found that the cooking is still incomplete. At one time, in conventional devices, after closing the door, the cooking button had to be pressed again to restart cooking.

[0006] Further, the re-cooking after the door is opened requires a corresponding operation of pushing the cooking button again, but it is difficult for an elderly person or other person unfamiliar with the operation to handle, and there is a problem that an appropriate response cannot be made. .

The present invention has been made in view of the above points, and after the door is opened and the cooking is temporarily stopped, the cooking can be restarted only by closing the door within a certain effective time. It is intended to provide a cooker controlled as such.

[0006]

According to the present invention, there is provided a heating chamber having a heating device, a door for opening / closing the heating chamber, a door opening / closing detecting means for detecting opening / closing of the door, and an opening / closing detecting means for the door. And a control means for controlling the cooking so as to be interrupted when the door opening is detected, and for restarting the cooking when the door closing is detected within a predetermined time after the door opening is detected. It is a heating cooker.

[0007]

[Function] When the door is opened and cooking is temporarily stopped and then restarted, it is detected that the door is closed, and if the door is closed within the set predetermined time (effective waiting time),
The operation to restart automatically and continue cooking is simplified.

Further, the waiting time for accepting the restart is determined, and the reheating after a lapse of a long time is avoided so that the unfinished cooked product is not produced.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 and FIG. 2 show the structure of a microwave oven 1 which is a cooking device according to an embodiment of the present invention, and 2 is a storage box for storing cooked foods 3, that is, a heating chamber of the microwave oven 1,
The microwave from the magnetron 4 is guided to the outside by the waveguide unit 5.
Is being supplied through.

A front surface of the heating chamber 2 is opened, and a door 6 is provided therein to be openable and closable so that the cooked food 3 can be put in and taken out. Further, the heating chamber 2 is provided at its bottom with a turntable 7 on which the cooked food 3 is placed and rotated. The turntable 7 is provided in the heating chamber 2
Is connected to an output shaft 9 of a synchronous motor 8 with a built-in speed reducer, which is fixed to the lower part of the table, and the turntable 7 is rotated by driving the synchronous motor 8 to uniformly heat the cooked food 3. ing.

FIG. 3 shows the control circuit of the microwave oven, which is provided with a microcomputer 11 as a control unit for controlling the microwave oven. The microcomputer 11 has a door opening / closing detecting means such as a signal from the keyboard 12 for setting heating conditions such as operating (heating) time and heating temperature, and a door switch for turning on / off in response to opening / closing of the door 5. While the detection signal from 13 is input, the microcomputer 11 includes a high-frequency oscillator circuit 14 including the magnetron 4 and the like, and an output device 15 such as an interior lamp and a blower motor provided in the heating chamber 2;
For example, when the door 6 has been open for a long time, the output of a notification means 16 such as a buzzer that sounds to call attention is controlled, and a display unit 17 that displays the heating temperature set during cooking, the remaining cooking time, and the like. The display is controlled.

Therefore, when the door 6 is opened and the cooked food 3 is put into the heating chamber 2, the heating time and the heating temperature are input and set by the keyboard 12, and the cooking button (not shown) is pressed, the high frequency oscillation circuit 14 and the turn are turned on. The synchronous motor 8 of the table 7 is driven, and the cooked food 3 on the turntable 7 is heated and cooked by the microwave until the set time ends.

If the microcomputer 11 receives a detection signal from the door opening / closing detection means 13, that is, the door switch when the door 6 is opened during cooking, the microcomputer 11 controls the high frequency oscillation circuit 14 to stop oscillating. The microwave that protects the human body is protected from the microwave oven 1.

FIG. 4 shows the flow of the control program according to the present invention incorporated in the microcomputer 11.
The control operation of the microwave oven 1 will be described in detail below with reference to FIG.
Further, the control circuit is equivalent to the circuit of FIG. 3, and the microcomputer 11 has a function of measuring the present time and counting and displaying the elapsed time after the end of cooking.

Cooking is started, and in S (step) 1, the progress of the preset cooking time and the achievement status of the finishing level of cooking are judged. Cooking progresses according to the set time, and if S1 is YES, cooking is ended, and if S1 is NO, cooking is proceeded to S2. In S2, it is determined whether the door 6 is opened during cooking. If the door 6 cannot be opened, S
2 is NO, and the process returns to S1 to continue cooking. However, when the door 6 is opened during cooking, S2 becomes YES and the oscillation operation of the high-frequency oscillation circuit 14 is stopped, and the processing of S3 for temporarily stopping cooking is executed. Next, in S4, the opening / closing of the door 6 is detected again. If NO in S4 with the door 6 still open, the process returns to S3 and the cooking pause is maintained.

On the other hand, when the door 6 is closed after the door is opened, S4 becomes YES and the process proceeds to S5. In step S5, it is determined whether the operation of opening the door 6 and then closing the door 6 has been performed within a certain preset time, for example, one minute, or after the door is opened.

Therefore, the door 6 is closed after the door is opened.
If minutes have passed (for example, after 2 minutes), S5 is YES.
Then, the cooking operation is terminated for the time being, and by restarting the cooking by pressing the cooking button again on condition that the door 6 is closed, or canceling the cooking or waiting for another cooking.

On the other hand, if the door 6 is reclosed before 1 minute has passed since the door 6 was opened, the result of S5 is YES.
Go to and restart the cooking that was paused automatically. Therefore, heating cooking is performed so as to finish the remaining cooking time, and the cooking is finished when a predetermined time elapses.

Although the waiting time for restart acceptance is 1 minute here, it goes without saying that it may be set to a value other than 1 minute.

Thus, even if the cooking is temporarily stopped by opening the door during cooking, it is convenient to restart by simply closing the door.

Further, since the restart is accepted after setting the effective time, it is possible to avoid the problem that the food does not satisfy the predetermined finishing temperature when it is reheated after the door is opened for a long time.

By the way, in a microwave oven controlled by a microcomputer, the set time is subtracted during cooking and the remaining time is displayed, and after cooking is completed, it is possible to know how long before cooking is completed. There is. For example, as shown in Japanese Unexamined Patent Publication No. 4-121525, the elapsed time after the end of cooking is displayed, a buzzer is sounded at regular time intervals to notify the user, and reheating is performed depending on the length of time left after cooking. It is a microwave oven that makes it possible to determine if it is necessary.

However, in this conventional technique, although the elapsed time after the end of cooking can be known, if the cooking must be done by a predetermined time, the current time is not known and it is inconvenient. Further, as a means of visually appealing, only the display of the elapsed time causes little change in the display itself and the recognition degree is poor.

Therefore, after the completion of cooking, a microwave oven equipped with a display means for displaying both the elapsed time from the completion of cooking and the current time is designed so that cooking can proceed as planned.

That is, FIG. 5 shows a cooking end routine flowchart which is a part of the control program of the microwave oven.

After the cooking is finished, in S (step) 11, the counting of the elapsed time from the end of the cooking is started and the process proceeds to S12. In S12, use the door switch to open the door 6
Detects opening and closing of. Generally, when cooking is completed, the door 6
Open and take out the cooked items. Therefore, if the door 6 is closed to open (YES in S12), the process proceeds to S13, and the display of the elapsed time is unnecessary, so the counting of the elapsed time is stopped and the counter is reset. Then proceed to S14,
The current time is displayed and the routine jumps to another routine such as a standby mode routine.

However, if the door 6 is closed after cooking is completed (NO in S12), the process proceeds to S15. In S15, it is determined whether or not the cancel key has been operated.

Here, the cancel key is operated when canceling and changing the setting condition input by the keyboard 12, or when stopping cooking on the way. S15
The reason for judging whether or not the cancel key is input with is
Considering that a person who is unfamiliar with the operation of the microwave oven misunderstands that the cancel key needs to be pressed in order to completely stop the operation after the cooking is completed, the operation is considered.

Therefore, if the door 6 is not opened and the cancel key is input (YES in S15), S13 and S14 are executed, and the display of the current time is displayed.

On the other hand, when the state in which the door 6 is not opened and the cancel key is not input continues (NO in S12, N in S15).
In O), the process proceeds to S16, and the elapsed time and the current time are displayed alternately on the display unit 17. After that, the process returns to S12, and until the door 6 is opened or the cancel key is input, S12-
The control of the loop of S15-S16 is repeated, and the elapsed time and the current time are displayed alternately on the display unit 17.

The elapsed time and each time for displaying the current time can be arbitrarily selected.

As described above, not only the elapsed time after the end of cooking is displayed but also the current time is displayed alternately, so that the end of cooking can always be visually appealed.

Further, when the cooking must be done by a predetermined time, the present time and the elapsed time from the end of the cooking can be immediately known without looking at the clock, and it becomes easy to schedule the cooking thereafter.

[0035]

As described above, in a heating cooker such as a microwave oven, in order to confirm the finished condition during cooking,
I often open the door. Although the cooking operation is interrupted for safety when the door is opened, the present invention controls so that the restart is performed only by closing the door. Therefore, after the door is closed as in the conventional case, the start button is restarted. It is not necessary to press to save the trouble of operation.
Also, because the waiting time for accepting the restart is decided, the door will be opened for a long time and the temperature of the food will drop, so there is no reason that the finish of cooking set before opening the door cannot be obtained. .

[Brief description of drawings]

FIG. 1 is a front sectional view of a microwave oven according to the present invention.

FIG. 2 is a plan sectional view of the microwave oven.

FIG. 3 is a control circuit diagram for controlling the operation of the microwave oven.

FIG. 4 is a flowchart of a control program that enables automatic restart of cooking by reclosing the door according to the present invention.

FIG. 5 is a flowchart of time display control that makes it possible to more recognize the state of being left after cooking.

[Explanation of symbols]

 2 Heater 6 Door 11 Microcomputer 13 Door open / close detection means 14 High frequency oscillation circuit 16 Notification means

Claims (1)

[Claims] 1. A heating chamber provided with a heating device, a door for opening / closing the heating chamber, a door opening / closing detecting unit for detecting opening / closing of the door, and a door opening / closing detecting unit for detecting opening / closing of the door. A heating cooker characterized by comprising control means for controlling the cooking to be interrupted at times, and for restarting the cooking when the door closing is detected within a predetermined time after the door opening is detected.