JPH07220868A - Heating/cooking device - Google Patents

Abstract

PURPOSE:To uniformly heat food in a short time by providing a prescribed time detection section and a prescribed temperature detection section capable of judging that the heating values from the top plate side and bottom plate side of a heating chamber are made nearly uniform, and controlling the rotation of a rotary base with them. CONSTITUTION:The heating time is counted by a timer and the elapse of the prescribed heating time stored in a memory is detected by a prescribed time detection section. The arrival of the temperature of a heating chamber 2 to the prescribed temperature is detected by a thermistor 13. When either of them is attained early, the heating values from the top plate 2a side and the bottom plate 2d side of the heating chamber 2 are judged to be made nearly uniform. A rotary base 9 is rotated by a motor 11 by this time, thus the upper and lower faces of food 10 are uniformly heated by upper and lower heaters. When the rotation is stopped, the radiation to the food 10 is increased, and it is fast cooked. This device is suitable for bread baking, and bread is heated in a short time with no baking irregularity.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating cooker for heating food with a heater.

[0002]

2. Description of the Related Art A heating cooker of this type is disclosed in JP-A-4-23.
It is disclosed in Japanese Patent No. 3189. This is a heating chamber for containing food, a rod-shaped upper heater such as a quartz tube heater provided on the heating chamber top plate, a flat heater provided on the heating chamber bottom plate, and a food provided on the heating chamber bottom. It is provided with a rotary table on which the rotary table is placed, a motor for rotating the rotary table, and a control means for rotating the motor by a predetermined angle a predetermined time before the end of cooking.

[0003]

However, since a heater such as a quartz tube heater, which has a fast rise in temperature of the heater itself but has a small heat generation amount, that is, a heater having a small heat capacity, is arranged on the top plate of the heating chamber, at the start of heating. For food, the part of the upper surface, especially near the heater, burns quickly, but other parts do not burn easily because the heat of the heater is weak. Therefore, the position where the food is heated must be moved over time in order to evenly burn.

On the other hand, when the food is heated while being rotated on the turntable, the food does not always receive heat from the heater just because it is placed on the turntable, and the food is placed on the turntable. It will also heat places that have not been heated. Therefore, the cooking time becomes longer because the time during which the food receives the heat from the heater becomes shorter during a certain period of time.

Further, since a flat heater having a large heat generation amount, that is, a large heat capacity is used for the bottom plate of the heating chamber, the temperature of the heater itself is slow, so that a heater having a small heat capacity is arranged on the top plate of the heating chamber. Since the heater temperature does not rise easily at the start of heating, the amount of heat generated is small, and food can be heated, but the progress of heating slows down and the cooking time becomes longer accordingly.

At this time, since there is a difference in the degree of charring between the upper surface and the lower surface of the food, the flat heater on the bottom plate of the heating chamber may be replaced with a heater having a small heat capacity. When heated, the heat is blocked by obstacles such as the turntable, so that the lower surface cannot be heated uniformly like a flat heater. Therefore, if the bottom plate of the heating chamber is heated by a heater and the food is heated by the heat generated from the bottom plate, it can replace the flat heater.

However, since the heater has a small heat capacity, it is the bottom plate near the heater that heats up. As described above, there is a difference in the degree of scorching, and there is a problem that the cooking time becomes long if heated while rotating.

The present invention solves such a problem.

[0009]

Means for solving the problems of the present invention include a heating chamber for storing food, an upper heater arranged directly on the heating chamber for heating the food, and an upper heater arranged on the top plate, and the heating chamber. Bottom heater for heating food through the bottom plate of the heating chamber, a lower heater attached to the outer wall of the heating chamber bottom plate, a rotary table for mounting food provided on the heating chamber bottom, a motor for rotating the rotary table, and the upper heater. , A lower heater, and a control device for controlling the motor. The control device has a timer for measuring time, and the amount of heat generated from the heating chamber top plate side and the bottom plate side with respect to the food by the timer is substantially equal. A predetermined time detection unit that detects the passage of a predetermined time that can be determined that, and the motor control unit that rotates the motor until the predetermined time detection unit detects the passage of the predetermined time, and then stops the motor, With a configuration that has That.

Further, a temperature detecting element for detecting the temperature in the heating chamber is provided, and the control device is such that the temperature detected by the temperature detecting element is the amount of heat generated from the heating chamber top plate side and the bottom plate side with respect to the food. A predetermined temperature detection unit that detects that the temperature has reached a predetermined temperature that can be determined to be substantially equal, and the motor is rotated until the predetermined temperature is detected by the predetermined temperature detection unit,
After that, the motor control unit for stopping the motor is provided.

Further, the control device has a timer for counting time, and a predetermined time period with which it can be judged that the heat generation amount from the heating chamber top plate side and the heating plate bottom side with respect to the food is substantially equalized by the timer. For a predetermined time, a temperature detecting element for detecting the temperature in the heating chamber, and the temperature detected by the temperature detecting element is about the amount of heat generated from the heating chamber top plate side and the bottom plate side with respect to the food. Rotate the motor until it is detected by either the predetermined temperature detection unit or the predetermined temperature detection unit that detects that the temperature has reached a predetermined temperature at which it can be determined that the temperature has become equal, and then stop the motor. And a motor control unit for controlling the motor.

[0012]

In other words, the motor is operated until a predetermined heating time elapses when it is determined that the heat generation amounts from the top plate side and the bottom plate side of the heating chamber become substantially equal or until the temperature reaches the predetermined temperature of the heating chamber. While rotating the turntable with the motor by the control unit, the food is heated by the upper heater and the lower heater to make the upper or lower surface of the food charring substantially uniform, and then the food is placed near the heater used as the upper heater. The rotating table is rotated to move and stop.

[0013]

EXAMPLES 1 is a frame of a microwave oven, 2 is a frame 1
It is a heating chamber arranged inside. The heating chamber 2 includes a top plate 2a,
It is composed of a right side plate 2b, a left side plate 2c, a bottom plate 2d, and a rear face plate 2e.

Reference numeral 3 is a magnetron for generating microwaves to be supplied into the heating chamber 2, and 4 is a waveguide attached to the right side plate 2b of the heating chamber 2 for guiding the microwaves generated in the magnetron 3 into the heating chamber 2. 5 is a top plate 2 at the rear of the heating chamber 2
a, that is, in the vicinity of the rear plate 2e of the top plate 2a, an upper heater housing chamber provided integrally with the top plate 2a in a substantially trapezoidal cross section,
6 has a substantially trapezoidal cross section, and has a bottom plate 2d at the rear of the heating chamber 2,
That is, a lower heater accommodating chamber mounted near the rear plate 2e of the bottom plate 2d, 7 is an upper heater having a small heat capacity such as a quartz tube heater, a sheath heater, or a halogen heater accommodated in the upper heater accommodating chamber 5, and 8 is the lower heater accommodating chamber. A lower heater of the same type as the upper heater 7 housed in the chamber 6, 41 is a door for opening and closing the front opening of the heating chamber 2.

When the upper heater 7 is arranged in the central portion of the top plate 2a, the rotary table 9 described later rotates substantially in the central portion of the heating chamber 2, so that, for example, in the case of baking bread, the central portion of the rotary table 9 is Since the distance from the upper heater 7 does not change and the distance around the upper heater 7 changes with rotation, a difference occurs in the degree of scorching between the center part and the end part of the turntable 9. Further, when it is provided in the front part of the top plate 2a, it is arranged near the door 41, so that the door 41 is heated and thermally deformed to cause a gap with the main body of the microwave oven, which causes a radio wave leakage. Therefore, it is provided on the rear portion of the top plate 2a of the upper heater 7.

If the lower heater 8 is arranged at the center of the bottom plate 2d, the motor 11 for rotating the rotary table 9 cannot be arranged because it interferes, and even if it is arranged in the vicinity thereof, the motor 11 is also heated. Therefore, the temperature of the motor 11 rises. Further, the door 41 is heated at the front portion of the bottom plate 2a as in the above, which causes a radio wave leakage. Therefore, it is arranged at the rear portion of the bottom plate 2a of the lower heater 8.

Reference numeral 9 is a bottom of the heating chamber 2, and a net-shaped turntable on which a food 10 such as bread is placed. Reference numeral 11 is attached to an outer wall of the bottom plate 2d of the heating chamber 2, and a substantially central portion of the bottom plate 2d is provided. A motor consisting of a synchronous motor for fixing the rotary base to the rotating shaft 12 which is penetrated, 13 is the right side plate 2 in front of the heating chamber 2.
The thermistor serves as a temperature detecting element which is fixed by pressing a metal piece on the top plate 2a near b.

A door switch 14 is inserted into each of two power supply lines L1 and L2 connected to a commercial power supply and is turned on / off in conjunction with opening / closing of a door 41 provided at a front opening of the heating chamber 2, and 15 is a door switch. Is a monitor switch which is connected between the power supply lines L1 and L2 and which is turned off when the door 41 is closed and turned on when the door 41 is opened, and 16 is a fuse inserted in the power supply line L1. If the contacts are welded and the door 41 is not turned off even if it is opened, the monitor switch 15 is turned on in conjunction with the opening of the door 41, so that a short circuit is formed and the fuse 16 is blown to forcibly turn off the power. .

Reference numeral 17 denotes an interior lamp which serves as illumination in the heating chamber 2,
Reference numeral 8 is an interior light relay for turning on / off a contact 18a connected in series with the interior light 17 by a relay coil 18b, and 19 is a relay coil 19 for a contact 19a connected in series with the motor 11.
b is a motor relay that turns on and off by b, 20 is a blower motor that rotates a fan that blows cooling air to control parts,
Reference numeral 21 is a blower motor relay for turning on / off a contact 21a connected in series with the blower motor 20 by a relay coil 21b, and 22 is a contact 22a connected in series with the upper heater 7.
An upper heater relay for turning on / off a relay coil 22b, a lower heater relay 23 for turning on / off a contact 23a connected in series with a lower heater 8 by a relay coil 23b, and a primary winding 24a connected between power supply lines L1 and L2. A high-voltage transformer having a heater winding 24c for generating a high voltage obtained by boosting the commercial voltage in the secondary winding 24b and supplying a reduced heater voltage to the cathode K of the magnetron 3 for heating the cathode K of the magnetron 3.

The interior light 17, the contact 18a, the motor 11
And the contact 19a, the blower motor 20 and the contact 21a, the upper heater 7 and the contact 22a, and the lower heater 8 and the contact 23a are connected in parallel between the power lines L1 and L2 between the door switch 14 and the high voltage transformer 24. Has been done.

Reference numeral 25 denotes a series circuit formed by the lower heater 8 and the contact 23a of the lower heater relay 23, and a high voltage transformer 24.
25a to the power supply line L2 between the primary winding 24a of the
Insert and turn on and off with the relay coil 25b,
It is a power relay that turns on and off the power to the magnetron 3.

Reference numeral 26 denotes a high-voltage capacitor having one end connected to one end of the secondary winding 24b of the high-voltage transformer 24 and the other end connected to the cathode K of the magnetron 3, and 27 denotes an anode at the other end of the high-voltage capacitor 26 and a cathode. A high voltage diode connected to the other end of the secondary winding 24b and grounded. The high voltage capacitor 26 and the high voltage diode 27 form a half-wave voltage doubler rectifier circuit.

28 is a power supply circuit for rectifying commercial power to supply control power to control parts, 29 is a key input section having a start key for cooking and a set key for the number of breads (one or two), and 30 is cooking. An indicator for displaying the contents and the remaining time of cooking, 31 is a buzzer for notifying the end of cooking, and 32 is a door open / close detection switch for detecting the open / closed state of the door 41 for opening / closing the front opening of the heating chamber 2.

33 is each relay 18, 19, 21, 22,
A relay driver circuit for connecting to the relay coils 23 and 25 to open and close each contact, and a control device 34 including a microcomputer and the like.

The control device 34 includes a timer 35 for counting the heating time, a predetermined time detection unit 36 for detecting the elapse of a predetermined time of the timer 35, and a predetermined time for detecting that the thermistor 13 has reached a predetermined temperature. Temperature detector 37
And a motor control unit 38 for controlling the rotation of the motor 11 for rotating the rotary base 9, and a memory 39 for storing the heating time.
And a time correction unit 40 that shortens and corrects the heating time stored in the memory 39 according to the temperature detected by the thermistor 13.

In the present embodiment, the heating time stored in the memory 39 is set to 2 minutes 10 seconds for one piece of bread and 2 minutes 46 seconds for two pieces of bread, and the predetermined time of the predetermined time detection unit 36 is set to the pan time. In the case of one sheet, the remaining time is 1 minute 5 seconds and 5 seconds, that is, the elapsed time 1
Minutes 5 seconds, 2 minutes 10 seconds, 2 bread time remaining 1 minute 23
Seconds and 33 seconds, that is, elapsed times of 1 minute 23 seconds and 2 minutes 13 seconds.

Further, the predetermined temperature of the predetermined temperature detector 37 is set to 2
When the temperature detected by the thermistor 13 is 100 ° C. or higher, the time correction unit 40 sets the heating time to be counted by the timer every time the temperature is increased by 10 ° C. and 10 seconds is subtracted from the heating time stored in the memory 39. .

The operation of this structure will be described with reference to FIGS. 6 to 7. As an example, the operation of baking two toasts using the automatic toast function will be described.

First, immediately after the power is turned on, step S1
Then, the timer 35 and the number-of-sheets setting flag F are reset.
In step S2, it is detected whether the user has operated any one of the key input sections 29. If the key operation is detected, it is detected in step S3 whether or not the automatic toast key is operated. If it is another key, another process is performed in step S4. When the automatic toast key is operated, that is, when the automatic toast function is selected, in step S5,
Detects whether the number of toasts has been set. When the number of sheets is set in step S6, it is 1 sheet or 2 sheets.
Judge whether it is a sheet. If it is one, the number-of-sheets setting flag F is set in step S7, but since it is two this time, it is in the reset state. Then, in step S8, the process waits until the operation of the cooking start start key is detected.

After placing two pieces of bread on the rotary table 9 of the heating chamber 2 (state (a) of FIG. 4), if it is detected in step S8 that the cooking start start key has been operated,
After performing the initial operation in 9, the heating operation is started.

In step S9, the inside lamp relay 18 is driven to light the inside lamp 17, and more specifically, the relay coil 18b of the inside lamp relay 18 is energized via the driver circuit 33 from the control section 34 to contact the contact 18a. Is closed and the interior lamp 17 is energized. Similarly, the motor relay 19 is driven to turn on the motor 11, the blower motor relay 21 is driven to blower on, the upper heater relay 22 is driven to turn on the upper heater 7, and the lower heater relay 23 is driven to go down. Turn on the heater 8.

In step S10, the heating time is read from the memory 39 to the control device 34 and set in the timer 35. Since 2 pieces of bread are baked, 2 minutes and 46 seconds are set.
If it is one, it will be set to 2 minutes and 10 seconds.

In step S11, the thermistor 13 detects the temperature (detection temperature H). In step S12, it is determined whether the detected temperature is 100 ° C. or higher. If 100 ℃
If it is above, in step S13, the time correction unit 40 corrects the heating time set by the timer 35. Specifically, each time the temperature rises by 10 ° C., the temperature is subtracted for 10 seconds for correction. However, since this is the first cooking, the temperature detected by the thermistor 13 is low and no correction is made.

The operation of the timer 35 is started in step S14, and it is determined in step S15 whether the timer 35 has counted up.

If the timer 35 counts up, the ending operation is performed in step S16. That is, the inside light relay 18 is turned off and the inside light 17 is turned off. More specifically, the inside light relay 1 from the control device 34 via the driver circuit 33.
No.8 relay coil 18b is turned off and contact 18a
To turn off the interior light 17. Similarly, the blower motor relay 21 is turned off to turn off the blower motor 20 and the upper heater relay 22 is turned off to turn off the upper heater 7.
The lower heater relay 23 is turned off and the lower heater 8 is turned off.
Then, in step S17, the buzzer 31 is sounded to notify the end.

However, since the timer 35 has not started counting now, steps S15 to S1
Go to 8.

In step S18, it is determined whether the number of sheets setting flag F is set or reset. The number-of-sheets setting flag F is set to 1 if set and 2 if reset.

Since it is set to two sheets this time, the flag F is set.
Has been reset. In step S19, the temperature of the thermistor 13 (detection temperature H) is detected. Step S20
Then, it is determined whether the detected temperature H is 200 ° C. or higher. Two
If it is equal to or higher than 00 ° C., the process proceeds to step S22, but since the temperature has not been heated, the detected temperature has not reached 200 ° C., and the process proceeds to step S21. In step S21, timer 3
At 5, it is determined whether 1 minute and 23 seconds have passed.

Here, when a predetermined time elapses from the start of heating, or the detected temperature H of the thermistor 13 reaches a predetermined temperature, or whichever comes first, the motor 11 for rotating the turntable 9 is stopped. This is because the upper heater 7 directly irradiates the inside of the heating chamber 2, but the lower heater 8 heats via the bottom plate 2d of the heating chamber, so that the heat from the lower heater 8 is transferred to the inside of the heating chamber 2. In addition, it is necessary to heat the bottom plate 2d to heat it so that the inside of the heating chamber 2 cannot be heated, and there is a difference between the time required for heating by the upper heater 7 and the time required for heating by the lower heater 8. Will occur. Therefore,
If the rotating table 9 is stopped until the lower surface of the pan is burnt to some extent by the heating of the lower heater 8, the upper surface of the pan near the upper heater 7 is burnt by the heating of the upper heater 7,
Until the heating by the upper heater 7 and the heating by the lower heater 8 can be performed uniformly, that is, until a predetermined time elapses from the start of heating or when a predetermined temperature is detected by the thermistor 13, the rotation table 9 continues to rotate and then stops. . When the turntable 9 was rotated, the portion other than the bread was also irradiated. However, when the turntable 9 is stopped, the bread will come into contact with more of the bread, so that cooking can be done faster accordingly.

The predetermined time of 1 minute and 23 seconds is normal temperature (20
This is the time when heating is started at 0 ° C.) and the heat generation amount from the top plate side where the upper heater 7 is arranged and the heat generation amount from the bottom plate side where the lower heater 8 is arranged are judged to be substantially equal. Also, the predetermined temperature 2
00 ° C. is a temperature at which it is determined that the heat generation amount from the top plate side on which the upper heater 7 is arranged and the heat generation amount from the bottom plate side on which the lower heater 8 is arranged are substantially equal.

Until it is determined in step S21 that 1 minute and 23 seconds have elapsed, the process returns to step S14 and loops through steps S14, S15, S18, S19, S20 and S21.

When it is determined in step S21 that 1 minute and 23 seconds have elapsed, the rotation angle of the motor 11 is detected. Then, it is determined whether or not the rotation angle is 90 ° or 270 ° from the position started in step S23 (the state of FIG. 4B). If it is not at the above-mentioned position, steps S22 and S23 are executed until the position is reached, and the pan A in FIG. 4 is placed near the upper heater 7 and the lower heater 8 and heated.

Specifically, since the motor 11 is a synchronous motor, if the power supply frequency is 50 Hz, one revolution is 1/50 second, 6
It is known that 0 Hz takes 1/60 seconds. Therefore, assuming that the power supply frequency is 60 Hz, 1 minute 23 seconds is divided by 1/60 seconds, and the remainder is 0 seconds, so it is checked that it has returned to the position at the start, and 90 minutes after the start.
° Up to the rotated position is ((1/60) × (90/36
0)) seconds are checked.

If the determination is made in step S23, the motor 11
Is turned off, and the process proceeds to step S25. Step S25
Then, it is determined whether the elapsed time of the timer 35 has reached 33 seconds. If 33 seconds have not elapsed, step S14
To step S14, S15, S1
8, S19, S20, S21, S22, S23, S2
4, loop S25.

When the remaining 33 seconds have elapsed in step S25, the rotary table 9 is rotated by 180 ° in step S26 (state of FIG. 4C), that is, the motor 11 is set to ((1/6) × (1
80/360)) seconds.

This is a step for placing the pan B in FIG. 4 in the vicinity of the upper heater 7 and the lower heater 8 for heating.

Then, in step S28, steps S14 and S1 are performed until the remaining time of the timer 35 exceeds 3 seconds.
5, S18, S19, S20, S21, S22, S2
Loop through 3, S24, S25, S26, S27,
When 3 seconds have elapsed, the motor is rotated by 90 ° in step S28 and returned to the start position or the position reversed by 180 ° (state of (d) in FIG. 4).

When the timer 35 detects the elapse of the heating time in step S15, the ending operation is performed in step S16, and the buzzer sounds in step S17 to end the heating operation.

The above is the operation for baking two breads. If one is to be baked, one is set in step S5 and the number-of-sheets setting flag F is set, so that the process proceeds from step S18 to step S29. Transition (at the beginning of heating,
The bread is set in the state shown in FIG.

In step S29, the temperature of the thermistor 13 (detection temperature H) is detected. In step S30, it is determined whether the detected temperature H is 200 ° C. or higher. If the temperature is 200 ° C. or higher, the process proceeds to step S32, but since the heating is not completed, the detected temperature does not reach 200 ° C.
Move to. In step S31, the timer 35 is 1 minute 5
Determine if seconds have passed.

Until it is determined in step S31 that 1 minute and 5 seconds have elapsed, the process returns to step S14 and step S14 is performed.
14, S15, S18, S29, S30, S31 are looped.

When it is determined in step S31 that 1 minute and 5 seconds have elapsed, the rotation angle of the motor 11 is detected. Then, it is determined whether or not the rotation angle is 180 ° from the position started in step S33 (the state of FIG. 5B). If not, the steps S32 and S33 are executed until the position is reached.

Here, the pan placed on the turntable 9 is placed near the upper heater 7 and the lower heater 8 for heating.

If the determination is made in step S34, the motor 11
Is turned off, and the process proceeds to step S35. Step S35
Then, it is determined whether the elapsed time of the timer 35 has reached 5 seconds. If 5 seconds have not elapsed, the process returns to step S14, and steps S14, S15, S18, S
29, S30, S31, S32, S33, S34, S3
Loop up to 5.

If 5 seconds remain in step S35,
In step S36, the turntable 9 is rotated by 180 ° (state of FIG. 5C), that is, the motor 11 is ((1/6) × (1
80/360)) seconds.

When the timer 35 detects the elapse of the heating time in step S15, the ending operation is performed in step S16, and the buzzer sounds in step S17 to end the heating operation.

In the above description, the temperature of the heating chamber 2 detected by the thermistor 13 is 200 ° C. in order to determine that the amount of heat generated from the top plate side of the heating chamber is substantially equal to the amount of heat generated from the bottom plate side. Or the elapsed time from the start of heating has elapsed (1 minute 5 seconds for 1 piece of bread, 1 minute 23 for 2 pieces of bread)
Second), whichever comes first.

However, the present embodiment is not limited to this, and the heating chamber 2 is judged only by the elapsed time from the start of heating or only when the heating chamber 2 reaches a predetermined temperature (200 ° C.). It may be determined that the heat generation amount from the top plate side and the heat generation amount from the bottom plate side have become substantially uniform.

That is, in FIG. 8, the temperature of the heating chamber 2 is detected by the thermistor 13 in FIG.
Steps S19 and 2 for determining whether or not the temperature becomes 0 ° C. or higher
The operation | movement flowchart when the operation | movement of 0 and step S29 and S30 is excluded is shown.

Here, it is determined in step S18 whether or not the number-of-sheets setting flag F is set, in other words, whether the number of breads is one or two, and it is determined that the flag F is reset (two breads). Next, in step S21, it is determined whether the elapsed time from the start of heating is 1 minute 23 seconds. 1
When 23 minutes have passed, it is determined that the heat generation amounts on the top plate side and the bottom plate side of the heating chamber are substantially equal, and the process proceeds to the next step S22.

If it is determined in step S18 that the number of sheets setting flag F is set (one piece of bread), step S3
At 1, it is determined whether the elapsed time from the start of heating is 1 minute and 5 seconds. When 1 minute and 5 seconds have passed, it is determined that the heat generation amounts on the top plate side and the bottom plate side of the heating chamber have become substantially equal, and the process proceeds to the next step S22.

Further, in FIG. 9, step S in FIG.
The operation | movement flowchart in the case of excluding the operation | movement which determines whether the predetermined elapsed time from the heating start of 21 and S31 passed is shown.

Here, the reset state of the number of sheets setting flag is judged in step S18. If it is set, the heating chamber 2 by the thermistor 13 in steps S19 and S20, and if it is reset in step S29 and S30.
After the temperature is detected, whether the detected temperature H is 200 ° C. or higher is detected. If the detected temperature H is 200 ° C. or higher, it is determined that the heat generation amounts from the top plate side and the bottom plate side of the heating chamber are substantially uniform, and the next The process moves to step S22 or step S32.

As described above, according to the present invention, the calorific values on the top plate side and the bottom plate side of the heating chamber are substantially equal to each other only by the elapsed time from the start of heating or by detecting that the heating chamber 2 has reached the predetermined temperature. It may be determined that the heat generation amount becomes uniform, or the heat generation amount may become uniform when the elapsed time or the predetermined temperature is reached, whichever comes first.

[0065]

According to the present invention, baking of bread can be heated in a short time without unevenness of baking.

[Brief description of drawings]

FIG. 1 is a front cross-section of a microwave oven of the present invention.

FIG. 2 is a cross section of FIG.

FIG. 3 is a control block diagram of a microwave oven.

FIG. 4 is a diagram showing a mounted state of baking two breads in a heating chamber.

FIG. 5 is a diagram showing a mounted state of baking one bread in the heating chamber.

FIG. 6 is an operation flowchart.

FIG. 7 is a flowchart of the operation continued from FIG. 7;

FIG. 8 is an operation flowchart of another embodiment (FIG. 7).
(Changed figure).

9 is an operation flowchart of another embodiment (FIG. 7).
(Changed figure).

[Explanation of symbols]

 2 heating chamber 2a top plate 2d bottom plate 7 upper heater 8 lower heater 9 rotary table 11 motor 13 thermistor (temperature detection element) 34 controller 35 timer 36 predetermined time detection unit 37 predetermined temperature detection unit 38 motor detection unit

Claims (3)

[Claims] 1. A heating chamber for accommodating food, an upper heater disposed directly on a top plate of the heating chamber for directly heating the food, and a heating chamber bottom plate for heating the food through a bottom plate of the heating chamber. A lower heater attached to an outer wall, a rotary table on which food provided on the bottom of the heating chamber is placed, a motor for rotating the rotary table, an upper heater, a lower heater, and a control device for controlling the motor, The control device is a timer for measuring time, and a predetermined time for detecting elapse of a predetermined time at which it is possible to determine that the amount of heat generated by the heating chamber from the top plate side and the bottom plate side of the food is substantially equalized by the timer. A heating cooker comprising: a detection unit; and a motor control unit that rotates the motor until the detection of the predetermined time by the predetermined time detection unit and then stops the motor. 2. A heating chamber for accommodating food, an upper heater disposed directly on a top plate of the heating chamber for directly heating the food, and a heating chamber bottom plate for heating the food through a bottom plate of the heating chamber. A lower heater attached to the outer wall, a rotary table on which food is provided on the bottom of the heating chamber, a motor for rotating the rotary table, a temperature detecting element for detecting the temperature in the heating chamber, the upper heater, A lower heater and a control device for controlling a motor are provided, and the control device is such that the detected temperature of the temperature detection element is substantially equal to the amount of heat generated from the heating chamber top plate side and the bottom plate side with respect to the food. And a motor control unit for rotating the motor until the predetermined temperature is detected by the predetermined temperature detection unit and thereafter stopping the motor. Characterized by Heat cooker. 3. A heating chamber for accommodating food, an upper heater disposed directly on a top plate of the heating chamber for directly heating the food, and a heating chamber bottom plate for heating the food through a bottom plate of the heating chamber. A lower heater attached to the outer wall, a rotary table on which food is provided on the bottom of the heating chamber, a motor for rotating the rotary table, a temperature detecting element for detecting the temperature in the heating chamber, the upper heater, A lower heater and a controller for controlling the motor are provided, and the controller has a timer for measuring time, and the amount of heat generated from the heating chamber top plate side and the bottom plate side with respect to the food by the timer is substantially equal. A predetermined time detection unit for detecting the lapse of a predetermined time that can be judged that the temperature has fallen, a temperature detection element for detecting the temperature in the heating chamber, and the temperature detected by the temperature detection element is the heating chamber top plate side with respect to the food. The amount of heat generated from the bottom plate side is almost even The motor is rotated until it is detected by either a predetermined temperature detection unit that detects that the temperature has reached a predetermined temperature that can be determined to have reached the predetermined temperature, or the predetermined time detection unit or the predetermined temperature detection unit, and then the motor is stopped. A heating control device comprising: a motor control unit.