JPH06241466A - Microwave oven - Google Patents

Abstract

PURPOSE:To provide a microwave oven capable of contriving the improvement of operability in the setting of a time by a rotary encoder. CONSTITUTION:A microwave oven is provided with a time setting means, in which a rotary encoder pulse generating unit 10 generates a pulse by rotating a rotary encoder into normal direction to set a cooking time while the setting of a time is effected by the pulse, and a setting means or a control unit 3, capable of changing the weight in time of the waveform of one pulse generated from a time point whereat the rotary encoder is turned reversely. The cooking time is set by changing the weight in time of one pulse generated by the pulse generating unit 10 by rotating the rotary encoder into reverse direction when the cooking time is set by rotating the rotary encoder into the normal direction thereof.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microwave oven for general household use or business use.

[0002]

2. Description of the Related Art In a conventional microwave oven using a rotary encoder, the time can only be set by the manufacturer in advance (every 10 seconds, every 30 seconds, etc.). I couldn't.

[0003]

In such a conventional microwave oven, if it is desired to set 15 seconds, for example, 10 seconds,
Only 20 seconds can be set, and as a result, an appropriate cooking time cannot be obtained, which adversely affects the finish of the food. Further, when setting a long cooking time in short time increments, the number of rotations of the rotary encoder is increased, resulting in poor operability.

The present invention has been made in order to solve such a problem, and it is an object of the present invention to provide a microwave oven having the same configuration as the conventional one, which can improve the operability of time setting by a rotary encoder. It is intended.

[0005]

In order to solve the above-mentioned problems, a first aspect of the present invention is a state in which a rotary encoder is in a forward rotation operation (state A) or a reverse rotation state (state B). It is provided with a function of being able to decrease or increase the time data at the time when the rotary encoder is reversely rotated from the state A in increments of 1 second, for example.

A second aspect of the invention is provided with a state storage means for storing the rotation state of the rotary encoder, and a key input means for changing the temporal weight of the waveform of one pulse generated from the rotary encoder. A function is added that can decrease or increase the time data at the time when is pressed, for example, in steps of 1 second.

A third aspect of the present invention is provided with state storage means for storing a rotation state of the rotary encoder and time storage means for measuring an operating time and a stop time of the rotary encoder, and is provided after the rotary encoder operates. When the device is operated again after a lapse of a certain time (for example, 1 second), a function is added that can decrease or increase the time data at this time, for example, in steps of 1 second.

A fourth aspect of the present invention includes a state storage means for storing the rotation state of the rotary encoder, and a state storage means for storing the open / closed state of the door. When the door is opened during operation, a function to decrease or increase the time data at this time in increments of 1 second, for example, is added.

[0009]

With the above-described structure, the present invention can be operated with a fine time setting in 1 second increments regardless of the setting time, which is long and short, as compared with the conventional setting means that only allows rough time setting. .

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a block diagram of a microwave oven according to an embodiment of the present invention, in which reference numeral 1 denotes a micro computer (hereinafter, abbreviated as a microcomputer) for controlling the entire microwave oven, which includes a storage unit 2, a control unit 3, The timer 4 and the determination unit 5 are built-in, and the interrupt terminal INT
It has input / output ports such as 1 and INT2. Reference numeral 6 denotes a power supply unit that supplies power to the microcomputer and also generates a power supply synchronization signal.

Further, 7 is a display unit for displaying cooking time, time, etc., 8 is an alarm unit for notifying the end of cooking, 9 is an input unit for keying a cooking mode etc., 10 is a time setting for controlling the present invention. Is a pulse generator of the rotary encoder, 11 is a door switch for notifying the open / closed state of the door, and 12 is a heating unit for driving a magnetron and a heater.

FIG. 2 is a pulse waveform generated when the rotary encoder is rotated when setting the cooking time of the microwave oven in one embodiment of the present invention. As shown in the figure, the pulse waveform of the rotary encoder has two output signals (called pulse A and pulse B), and the normal pulse A is connected to the interrupt terminal INT1 of the microcomputer,
When the rotary encoder is rotated, a pulse A causes an interrupt to the microcomputer, and the number of times of this interrupt is measured to obtain time data. It should be noted that if the signal level of the pulse B is HIGH at the time of the interrupt, it is determined that the rotation is forward rotation, and if it is LOW, the rotation is reverse rotation.

3 to 7 are flow charts of an embodiment implemented by the judgment unit 5 and the control unit 3. Normally, in step S1, the interrupt input from the interrupt terminal INT1 is permitted, and the time can be set by the rotary encoder. At this point, if there is an interrupt request to the interrupt terminal INT1, the determination unit 5 proceeds to the interrupt routines of FIGS. 4 to 7 to set the time by the rotary encoder, and under the control of the control unit 3, The main routine shown in FIG. 3 is executed to perform heating and cooking. That is, in step S2, the heating unit 13, the input unit 10, the display unit 8, the alarm unit 9, the rotary encoder pulse generator, and the like are controlled to heat and cook food.

In the main routine, as a result of the interruption, the states of the rotation direction flag and the time step change flag provided by the storage unit 2 are determined. If the time step change flag is not set, the value of the time setting counter set by the interrupt routine is set to a predetermined time value (for example, 10 seconds).
Multiply with the cooking time. On the other hand, if the time step change flag is set, the value of the correction counter set in the interrupt routine is multiplied by 1 second to increase or decrease the already set cooking time in the state of the rotation direction flag to reduce the cooking time. to correct. In step S3, it is determined whether or not the process has ended. If not, the process returns to step S1.

Next, the interrupt routine 1 executed by the judging section 4 will be described with reference to FIG. In step S11, the pulse B generated by the rotary encoder at the time of interruption is read, and the state is set in the rotation direction flag provided in the storage unit. If the rotation direction flag is "1", If the time setting counter is increased, on the other hand, if it is "0", the time setting counter is decreased,
Set the time increment change flag. In step S12, the state of the time step change flag is determined, and if it is "1", the state of the rotational direction flag that has already been set is determined, the correction counter is increased or decreased, and the routine returns from the interrupt routine.

Next, the interrupt routine 2 executed by the judging section 4 will be described with reference to FIG. In step S21, the pulse B generated by the rotary encoder at the time of interruption is read, and the state is set in the rotation flag provided in the storage unit,
If the rotation direction flag is "1", the time setting counter is incremented, while if it is "0", the time setting counter is decremented. In step 22, it is judged whether or not a specific key for changing the time step is pressed, and if it is pressed, the time step change flag is set. Step S23
Then, the state of the time change flag is judged, and if it is "1", the state of the rotational direction flag which has already been set is judged, the correction counter is increased or decreased, and the routine returns from the interrupt routine.

Next, the interrupt routine 3 executed by the judging section 4 will be described with reference to FIG. In step S31, the pulse B generated by the rotary encoder at the time of interruption is read, and the state is set in the rotation direction flag provided in the storage unit. If the rotation direction flag is "1", the time is set. The setting counter is incremented, while if "0", the time setting counter is decremented. In step 32, after the rotary encoder is operated, it is determined that the rotary encoder has been operated again after a certain period of time (for example, 1 second), and if it is pressed, the time step change flag is set. In step S33, the state of the time step change flag is determined, and if it is "1", the state of the rotational direction flag that has already been set is determined, the correction counter is increased or decreased, and the routine returns from the interrupt routine.

Next, the interrupt routine 4 executed by the judging section 4 will be described with reference to FIG. In step S41, the pulse B generated by the rotary encoder at the time of the interruption is read, and the state is set in the rotation direction flag provided in the storage section. If the rotation direction flag is "1", the time is set. The setting counter is incremented, while if it is "0", the time setting counter is decremented. In step S42, the open / closed state of the door is determined, and if it is open, the time increment change flag is set. In step S43, the state of the time step change flag is determined, and if it is "1", the state of the rotation direction flag that has already been set is determined, the correction counter is increased or decreased, and the routine returns from the interrupt routine.

[0019]

As described above, according to the present invention, with the same construction as the conventional one, compared to the conventional setting means which can only set the rough time, the fine time in 1 second increments can be set regardless of the long or short setting time. It can be operated by setting.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a microwave oven of the present invention.

FIG. 2 is an output waveform diagram of the rotary encoder of the present invention.

FIG. 3 is a first flowchart showing a main routine of the present invention.

FIG. 4 is a second flowchart showing an interrupt routine 1 of the present invention.

FIG. 5 is a third flowchart showing an interrupt routine 2 of the present invention.

FIG. 6 is a fourth flowchart showing an interrupt routine 3 of the present invention.

FIG. 7 is a fifth flowchart showing an interrupt routine 4 of the present invention.

[Explanation of Codes] 1 Microcomputer 2 Storage section 3 Control section 4 Timer 5 Judgment section 6 Power supply section 7 Display section 8 Alarm section 9 Input section 10 Rotary encoder pulse generation section 11 Door switch 12 Heating section

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hirokazu Tomimatsu 22-22 Nagaike-cho, Abeno-ku, Osaka City, Osaka Prefecture

Claims (4)

[Claims] 1. To set the cooking time, a time setting means for setting the time by rotating the rotary encoder in the forward direction, and a time weighting of the waveform of one pulse generated from the time when the rotary encoder rotates in the reverse direction. Microwave oven with a setting means that can change the. 2. To set the cooking time, the rotary encoder has a time setting means for setting the time by rotating the rotary encoder, and a function for varying the temporal weight of the waveform of one pulse generated from the rotary encoder. Equipped with setting means by specific key or any key,
A microwave oven equipped with setting means capable of varying the temporal weight of the waveform of one pulse generated from the time when this key is pressed. 3. To set a cooking time, a time setting means for rotating the rotary encoder to set the time, and after the rotation of the rotary encoder is stopped, after a certain time has elapsed, the rotary encoder is rotated again. A microwave oven provided with a setting means capable of varying the temporal weight of the waveform of one pulse generated from the point of time. 4. To set a cooking time, a door is opened for a time setting means for setting a time by rotating a rotary encoder and a time weight of a waveform of one pulse generated when the rotary encoder is rotated. Alternatively, when the rotary encoder is rotated in the opened state, a microwave oven equipped with a setting means capable of varying the temporal weight of the waveform of one pulse generated at that time.