JPH10220770A - Heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect accurate temperature distribution without causing displacement of temperature detection position in a heating cooker wherein temperature distribution of a food is detected and automated heating is performed. SOLUTION: Temperature detector means 5 is driven with positioning driving means 33 for positioning, and the temperature detector means 5 is driven with distribution detection driving means 32 to detect temperature distribution of the food and its surroundings, and heating control means 30 controls heating means 4 from the detected temperature distribution to heat the food, and further the driving of the temperature detector means 32 is switched with switching means 35 to the driving means 33 and the distribution detection means 32, whereby accurate temperature distribution is detected without causing displacement of temperature detection position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature detector for detecting the temperature of an object without contact.

[0002]

2. Description of the Related Art Conventionally, this kind of temperature detector is disclosed in
What was shown in 2011137 gazette was common. Hereinafter, description will be made with reference to FIG. FIG. 10 is a configuration block diagram of a conventional heating cooker. Cooking room 1
There is a turntable 3 for placing the food 2 therein, and the food 2 is heated by a cooking means, for example, a magnetron 4. Numeral 5 denotes a food temperature detecting means in which a plurality of infrared sensors are arranged in a one-dimensional array. The food temperature detecting means 5 is equally divided so as to cover the radius of the turntable 3 (divided into five in the figure), and simultaneously measures the temperatures in the respective regions. Things. The food temperature detecting means 5 is fixed near the ceiling surface of the cooking chamber 1 located above the midpoint between the center point and the end point of the turntable 3, and the food 2, the turntable 3 or the cooking chamber is opened through an opening window. The thermal energy radiated from the wall surface is independently detected in a non-contact manner for each of the divided areas and converted into a temperature. Also, while the food 2 is being cooked by the cooking means 4, the turntable 3 continues to rotate in a fixed direction at a fixed cycle.
Every time the turntable 3 advances by a certain angle (that is, every certain time)
The food temperature detecting means 5 detects the temperature of each area.

[0003] Numeral 6 denotes a judging means for storing the temperature information for each area transmitted from the food temperature detecting means 7 in correspondence with the rotation position of the turntable 3 and for one screen every turn of the turntable 3. Extract as food 2 and treat as 2D thermal image information, food 2
Is determined. The control means 7 controls the cooking means 4 based on the output of the determination means 6.

FIG. 1 shows a second conventional example disclosed in the above publication.
1 will be described. FIG. 11 is a block diagram showing the configuration of a second conventional heating cooker. The difference from the first conventional example is that the food temperature detecting means 5 is composed of an infrared sensor of one element, and the driving means 8 for changing the temperature detection position is connected to the food temperature detecting means 5. Is that the temperature detection means 5 is moved across the food 2 and reciprocally scanned to obtain two-dimensional thermal image information. The driving means 8 is constituted by, for example, a stepping motor, and is connected to the food temperature detecting means 5 via a timing belt.

[0005] The food temperature detecting means 5 is mounted near the ceiling surface of the cooking chamber 1 located above the midpoint between the center point and the end point of the turntable 3, and the temperature detection position covers the radius of the turntable 3 by the drive means 8. As described above, the heat energy radiated from the food 2, the turntable 3 or the wall of the cooking chamber 1 entering the field of view through the opening window at regular intervals is detected in a non-contact manner while periodically reciprocating by a predetermined angle. Convert to temperature.

[0006]

However, the first problem is to be solved.
The heating cooker shown in the conventional example has a problem that complicated work is required to match the characteristics of the plurality of infrared sensors. That is, it is generally very difficult to manufacture the device while maintaining the characteristic of the electric output amount with respect to the incident infrared energy amount, and thus the dispersion is several tens% or more. For this purpose, an amplifier circuit for amplifying the output of the infrared sensor is provided, and the amplification factor is adjusted so that the output amount of the amplifier circuit with respect to the incident infrared energy amount is controlled to be constant. In the first conventional example, an amplifier circuit is provided for each of the plurality of infrared sensors, and each of them must be adjusted, which involves complicated work.

In the case of the second conventional example, the infrared sensor is one element, which is advantageous in matching the characteristics of the infrared sensor, but has a problem that the detection position may be shifted. For example, even if the position of the stepping motor is controlled while the pulse is output, the driving may be performed outside the control due to noise other than the regular pulse. In particular, when a high frequency is used as a heating source like a magnetron, it is easily affected by noise. In a drive transmission mechanism such as a belt, idle rotation may occur due to the frictional resistance, and the detection position may be shifted. These positional deviations do not have much effect individually, but when used for a long period of time, these positional deviations are accumulated, and the detection position may deviate greatly from the designed detection range.

[0008]

In order to solve the above-mentioned problems, the present invention provides a heating means for heating a food, a temperature detecting means for detecting a temperature in a non-contact manner, and detecting a temperature distribution of the food and its surroundings. Drive control means for driving the temperature detection means, and heating control means for controlling the heating means based on the detected temperature distribution, wherein the drive control means includes a distribution detection drive means for detecting the temperature distribution. And a switching unit for switching between the distribution detection driving unit and the positioning driving unit.

According to the above-mentioned invention, positioning is performed by driving the temperature detecting means by the positioning driving means, and the temperature detecting means is driven by the distribution detecting driving means to detect the temperature distribution of the food and its surroundings. The heating control means controls the heating means to heat the food based on the obtained temperature distribution, and the switching means switches the driving of the temperature detecting means between the positioning driving means and the distribution detecting means, so that only one temperature detecting means is required. The operation of matching the characteristics is simple, and an accurate temperature distribution can be detected without causing a displacement of the temperature detection position.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention provides a temperature detecting means for detecting a temperature in a non-contact manner, a drive control means for driving the temperature detecting means for detecting a temperature distribution of the food and its surroundings, Heating control means for controlling the heating means based on a temperature distribution, wherein the drive control means includes a distribution detection drive means for detecting a temperature distribution, an alignment drive means for performing alignment, and the distribution detection drive. And a switching means for switching between the means and the alignment driving means.

[0011] Then, the temperature detection means is driven by the positioning drive means to perform positioning, and the temperature detection means is driven by the distribution detection drive means to detect the temperature distribution of the food and its surroundings. The heating control means controls the heating means to heat the food based on the heating means, and the switching means switches the driving of the temperature detecting means between the positioning driving means and the distribution detecting means. Is simple, and an accurate temperature distribution can be detected without causing a displacement of the temperature detection position.

The switching means has a heating stop judging means for operating the positioning drive means while the heating means is stopped.

Based on the judgment by the heating stop judging means, the switching means operates the positioning driving means while the heating means is stopped, so that the position shift of the temperature detection does not occur, and the temperature distribution is not detected during the heating. Therefore, appropriate heating control can be performed.

The switching means has a power-on determining means for operating the alignment driving means when the power is turned on.

Then, based on the judgment of the power-on judging means, the switching means operates the alignment driving means when the power is turned on, so that accurate temperature distribution can be detected without causing a positional shift from the first heating.

The switching means has a heating completion determining means for operating the positioning drive means when the heating of the food by the heating means is completed.

Based on the judgment by the heating completion judging means, the switching means operates the positioning driving means at the time of completion of the heating of the food. Can be done.

Further, a switch responsive to the presence of the temperature detecting means is provided at a predetermined position in the driving range of the temperature detecting means, and the positioning driving means has a switch confirming means for confirming the positioning by a signal from the switch. is there.

Since the switch checking means checks the position of the temperature detecting means by the switch provided at a predetermined position, the position can be adjusted and the position of the temperature detection does not shift.

Further, a stopper for regulating a driving range of the temperature detecting means is provided, and the positioning driving means has a driving amount storing section for storing a predetermined driving amount for a predetermined positioning, and the driving amount storing section is provided. The temperature detecting means is driven by the driving amount stored in the section to bring a part of the driving portion into contact with the stopper.

Then, the temperature detecting means is driven by the driving amount stored in the driving amount storage unit to position a part of the driving part in contact with the stopper for positioning. Does not cause displacement.

The position at which the alignment is performed is outside the driving range of the distribution detection driving means.

Since the positioning is performed outside the driving range of the distribution detecting means, the number of times of positioning can be reduced, and the durability of the driving means can be improved.

In addition, the cooking room has a cooking room for storing food, and the positioning is performed at a position where the temperature detecting means does not face the cooking room.

Since the positioning is performed at a position where the cooking chamber is not approached while the heating is stopped, the influence of dirt can be reduced, and the reliability and durability of the temperature detecting means can be improved.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. (Embodiment 1) FIG. 1 is a sectional view showing the structure of Embodiment 1 of the present invention. FIG. 2 is a sectional view of a main part of the temperature detecting means of the embodiment. FIG. 3 is an image diagram showing a driving state of the temperature detecting means of the embodiment. FIG. 4 is a configuration block diagram of the embodiment. FIG. 5 is a flowchart showing the operation of the embodiment. The same components as in the conventional example are denoted by the same reference numerals.

The food 2 is stored in the cooking chamber 1 and the food 2 is heated by the magnetron 4 as a heating means. 3 is food 2,
This is a turntable on which the plate 9 is placed, and the turntable 3 is rotated by a turntable motor 10 at a constant period.
The rotation center of the turntable motor 10 is substantially at the center of the bottom surface of the cooking chamber 1. Reference numeral 5 denotes an infrared sensor for detecting a temperature in a non-contact manner by a temperature detecting means. An opening 11 is provided on the ceiling surface of the cooking chamber 1 for securing an optical path. A chalk structure is formed so as not to leak. The chalk structure consists of two types of sheet metal 1
2a and 12b, 12a is for forming an optical path and is a cylindrical metal part having a wide opening 11 and is in close contact with the ceiling surface of the cooking chamber 1, and 12b is a box-shaped having small holes 13. The metal part 12a covers the sheet metal 12a and is in close contact with the ceiling surface of the cooking chamber 1. The choke structures 12a and 12b allow the infrared rays from the cooking chamber 1 to go outside through the small holes 13, but the radio waves inside the cooking chamber 1 are cut off and hardly leak to the outside. In FIG. 1, the dimension L is designed to be λ / 4, that is, the frequency is 2.4.
If it is 5 GHz, by setting it to 30 mm, the impedance becomes infinite at the small hole 13 and the effect of blocking radio waves is the greatest. If the dimension L is halved to 15 mm, the impedance becomes infinite at the opening 11 on the ceiling surface of the cooking chamber 1, and similarly, the effect of blocking radio waves is large and the size can be reduced.

A driving means 14 for driving the infrared sensor 5 is constituted by a stepping motor, and reciprocally scans a range shown by a broken line in FIG. 1 to move a temperature detection position.
The moving range of the temperature detection position moves linearly in the radial direction of the turntable 3, and a two-dimensional temperature distribution can be detected by a combination of the reciprocating scanning and the rotation of the turntable 3. A control unit 15 controls the magnetron 4 based on the two-dimensional temperature distribution obtained from the infrared sensor 5, and also controls the driving of the stepping motor 14.

The driving means 14 for reciprocally scanning the infrared sensor 5 will be described with reference to FIG. In FIG. 2, an infrared sensor 5 outputs an output correlated with a change in the amount of infrared light that enters in a pyroelectric type, that is, a change in temperature at a position serving as a visual field. The infrared sensor 5 is fixed inside the fixed member 16, and narrows the field of view through a lens 17 attached to the fixed member 16 to detect a temperature in a narrow range. The lens 17 is a Fresnel lens made of a material that transmits infrared rays. The stepping motor 14 rotates the small gear 19 and the chopper 20 around the first rotating shaft 18 as the center of rotation.

The chopper 20 forms a slit and rotates while opening and closing the optical path to the infrared sensor 5. By this opening / closing operation, the infrared sensor 5 outputs an output correlated with the temperature difference between the chopper 20 and the field of view in the cooking chamber 1. The small gear 19 is in contact with the large gear 21, and a second rotating shaft 22 is mounted on the large gear 21, and the second rotating shaft 22 is rotatably mounted by a receiving portion 23. Also, the second
A printed circuit board 24 is mounted on the rotating shaft 22 of this embodiment, and an electronic circuit (not shown) such as an amplifier circuit is mounted on the printed circuit board 24 in addition to the infrared sensor 5 and the switch 25. These are housed in a metal case 27 having a small hole 26 at a position serving as an infrared light path, covered with a metal lid 28, and fixed to the ceiling surface of the cooking chamber 1 or the chalk structure 12b shown in FIG.

A projection 29 is provided on the metal case 27. When the switch 25 is present at the position of the projection 29, the switch 25 can be pressed by the projection 29 to confirm the position. FIG. 3 shows the positional relationship between the infrared sensor 5, the switch 25, the small hole 26 and the projection 29. (A) shows the case where the temperature detection position is located at the center of the bottom of the cooking chamber 1; (b) shows the case where the temperature detection position is located around the bottom of the cooking chamber 1; ie, (a) and (b) show the temperature detection, respectively. This shows a case where the position is the end point of the temperature detection range, and reciprocating scanning of this range is repeated to detect the temperature distribution on the bottom surface of the cooking chamber 1. (C) is a position further clockwise from (b) of the end point of the temperature detection range. The temperature detection position is the inner wall surface of the metal case 27 and does not face the inside of the cooking chamber 1. At this time, the switch 25 overlaps with the protrusion 29 and is pushed. In this state (c), the infrared sensor is aligned.

The configuration of the control means 15 will be described with reference to FIG. The control means 15 includes the heating control means 30 and the drive control means 3
Consists of one. The heating control means 30 controls the magnetron 4 as the heating means based on the two-dimensional temperature distribution obtained from the infrared sensor 5 as the temperature detecting means. Heating control means 30
For example, if the maximum temperature of the two-dimensional temperature distribution obtained from the infrared sensor 5 exceeds a predetermined temperature, the magnetron 4 is stopped as cooking is completed.

At a point other than the initial stage of the start of heating, the portion having the highest temperature is not the dish 9 or the bottom of the cooking chamber 1 but a part of the food 2. By detecting the maximum temperature of the food 2 and stopping the heating, the heating can be completed without causing partial overheating.

The drive control means 31 includes the distribution detection drive means 3
2. It is composed of three kinds of driving means, ie, an alignment driving means 33 and a heating initial driving means 34, and a switching means 35 for selecting and switching one driving means from the three kinds of driving means. The distribution detection driving means 32 is a driving means for reciprocating scanning in the range between the state shown in FIG. 3A and the state shown in FIG. The alignment driving means 33 has a switch confirmation means 36 and is a driving means for driving clockwise to a state (c) shown in FIG.
The switch confirming means 36 confirms that the position has been adjusted by using the signal of the switch 25 as an input. The heating initial drive unit 34 is a driving unit that drives a predetermined amount in the counterclockwise direction to return from the state of (c) shown in FIG. 3 to the state of (b) at the start of heating.

The switching means 35 selects one of the three types of driving means and drives the stepping motor 14. The switching means 35 has a heating stop determination means 37, and the stepping motor 14 is driven by the distribution detection driving means 32 during heating, and the positioning drive means 33 is driven by the positioning drive means 33 during heating according to the determination of the heating stop determination means 37. At the beginning of the transition from the state to the heating state, it is driven by the initial heating driving means 34. The heating stop judging means 37 judges the heating start from the heating start switch 38 operated by the user, judges the heating completion by the input from the heating control means 30, and judges the heating start or the heating completion from the heating start or the heating completion. You do it.

A specific control operation will be described with reference to FIG. If the heating is stopped by the judgment of the heating stop judging means 37, and if the user has not pressed the start switch 38, it is checked by the switch checking means 36 whether the positioning has been performed. If the positioning has not been performed, a pulse is sent to the stepping motor 14 by the positioning driving means 33 and driven until a positioning confirmation signal is input from the switch 25. During the stop, it is always checked whether or not the positioning confirmation signal is input, and if it is, the stepping motor 14 is not driven. At this time, the infrared sensor 5 is stopped in the state shown in FIG.

When the user presses the heating start switch 38, the heating initial drive means 34 first sends a predetermined number of pulses to the stepping motor 14 to the end point of the detection position and drives it.
That is, the state shown in FIG. 3C is changed to the state shown in FIG. Then, the food 2 is heated by the magnetron 4. During the heating, the stepping motor 14 is driven by the distribution detecting drive means 32, and the infrared sensor 5 performs reciprocal scanning in the range from (a) to (b) in FIG. 3 to detect the temperature distribution. The heating control means 30 determines the completion of heating based on the temperature distribution, and stops heating when the heating is completed. When the heating is stopped, the stepping motor is driven by the positioning drive unit 33 until the switch checking unit 36 again inputs the positioning check signal by the switch 25.

In the above description, the position where the alignment is performed is outside the range for detecting the temperature distribution, that is, the position is not in the range from (a) to (b) in FIG. The number of times the switch 25 is pressed is reduced to ensure durability. In addition, when performing the positioning, the infrared sensor 5 is positioned so as to face the inner wall surface of the metal case 27 so as not to face the cooking chamber 1, so that the adhesion of unnecessary dirt and the like from the cooking chamber 1 can be reduced. For example, in the case of performing oven cooking or the like in which heating is performed by a heater as a heating means other than the magnetron 4 as the predetermined heating means, if the heating stop determination means 36 determines that the heating by the predetermined heating means is stopped, the processing shown in FIG. (C) can be maintained, and the cooking chamber 1
Contamination from the surface can be reduced. Oven cooking is generally heated to a high temperature in many cases, and the effect is great because there are many splashes of oils and fats.

(Embodiment 2) Next, Embodiment 2 of the present invention will be described with reference to FIG.
This will be described with reference to FIGS. FIG. 6 is a sectional view of a main part of a temperature detecting means according to a second embodiment of the present invention. FIG. 7 is an image diagram showing a driving state of the temperature detecting means of the embodiment. FIG. 8 is a configuration block diagram of the embodiment. FIG. 9 is a flowchart showing the operation of the embodiment.
The same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

In FIG. 6, an electronic circuit (not shown) such as an infrared sensor 5 and an amplifier circuit and a contact portion 39 are mounted on the printed circuit board 24. Further, a stopper 40 is provided on the metal case 27, and when the contact portion 39 is in contact with the stopper 40, the stepping motor is locked or idles beyond that and the infrared sensor 5 does not move.
FIG. 7 shows the positional relationship between the infrared sensor 5, the contact portion 39, the small hole 26, and the stopper 40. (A) and (b) show the case where the temperature detection position is the end point of the temperature detection range, and the reciprocating scanning of this range is repeated to detect the temperature distribution on the bottom surface of the cooking chamber 1. (C) is a position further clockwise from (b) of the end point of the temperature detection range. The temperature detection position is the inner wall surface of the metal case 27 and does not face the inside of the cooking chamber 1. At this time, the contact portion 39 comes into contact with the stopper 40 and cannot rotate further clockwise, and the infrared sensor is aligned in this state (c).

The configuration of the control means 15 will be described with reference to FIG. The drive control means 31 includes three types of drive means, a distribution detection drive means 32, a positioning drive means 33, and an initial heating drive means 34, and a switching means 35 for selecting and switching one drive means from the three types of drive means. The positioning drive unit 33 has a drive amount storage unit 41 that stores a predetermined drive amount, and is a drive unit that drives clockwise by a predetermined amount to drive to a state (c) shown in FIG. The predetermined amount stored in the driving amount storage unit 41 is obtained by setting in advance a driving amount necessary for driving from the state of FIG. 7A to the state of FIG. In any state in the range of (b), it can be stopped in the state of (c). The switching means 35 selects one driving means from the three types of driving means and drives the stepping motor 14. The switching means 35 includes a power-on determining means 42 and a heating completion determining means 43.
The power-on determining means 42 determines that the power is supplied to the entire cooking device including the control means 15. Control means 15
Is configured by a microcomputer program, the program starts when the power is turned on. Therefore, the beginning of the program is the power on. The heating completion judging means 43 includes the heating control means 30
It is determined from the input from that the state has shifted from the heating state by the heating means 4 to the heating stop state. The switching means 35 drives the stepping motor 14 by the positioning drive means 33 at the time of power-on and at the time of heating completion according to the judgment of the power-on judgment means 42 and the heating completion judgment means 43. The stepping motor 14 is driven by the distribution detection driving means 32, and is driven by the initial heating driving means 34 at first when the state changes from the stop state to the heating state by the input from the heating control means 30.

A specific control operation will be described with reference to FIG. First, when the power is turned on, the positioning driving means 3
By driving a predetermined number of pulses corresponding to the driving amount stored in the driving amount storage unit 41 to the stepping motor 14 by the step 3, the stepping motor 14 is stopped in the state of FIG. When the user presses the heating start switch 38, the heating initial drive means 34
First, a predetermined number of pulses are sent to and driven by the stepping motor 14 up to the end point of the detection position. That is, the state shown in FIG. 7C is changed to the state shown in FIG. Then, the food 2 is heated by the magnetron 4. During the heating, the stepping motor 14 is driven by the distribution detecting drive means 32, and the infrared sensor 5 performs reciprocating scanning in the range from FIG. 7A to FIG. 7B to detect the temperature distribution. The heating control means 30 determines the completion of heating based on the temperature distribution, and stops heating when the heating is completed. When heating is stopped, the stepping motor 1 is
A predetermined number of pulses are sent to 4 and driven to stop in the state of FIG.

In the above description, the point different from the first embodiment is that a configuration confirmation switch is not provided, and the number of parts is reduced to simplify the configuration. In addition, durability is improved by minimizing the lock or idling state of the stepping motor as the positioning drive only when the power is turned on and when the heating is completed. In addition, when the positioning is performed in the same manner as in the first embodiment, the infrared sensor 5 faces the inner wall surface of the metal case 27 and does not face the cooking chamber 1. And the like can be reduced.

[0044]

As described above, according to the present invention, positioning is performed by driving the temperature detecting means by the positioning driving means, and the temperature detecting means is driven by the distribution detecting driving means to control the temperature of the food and its surroundings. Based on the detected temperature distribution, the heating control means controls the heating means to heat the food based on the detected temperature distribution, and the switching means switches the driving of the temperature detecting means to the positioning driving means and the distribution detecting means. The operation of matching the finished characteristics is simple with one unit, and an accurate temperature distribution can be detected without causing a displacement of the temperature detection position.

Further, the switching means operates the alignment driving means based on the judgments of the heating stop judging means, the power-on judging means, and the heating completion judging means. Since the temperature distribution can be detected, appropriate heating control can be performed, and the durability of the driving means can be improved.

Further, since the positioning is out of the driving range of the distribution detecting means, the number of times of positioning can be reduced, the durability of the driving means can be improved, and the positioning can be performed at a position where the cooking chamber does not face during the heating stop. Therefore, the influence of dirt can be reduced, and the reliability and durability of the temperature detecting means can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of the configuration of a heating cooker according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a main part of a temperature detecting means of the cooking device.

3A is an image diagram showing a driving state of a temperature detecting unit of the cooking device. FIG. 3B is an image diagram showing a driving state of a temperature detecting unit of the cooking device. Image diagram showing driving state

FIG. 4 is a configuration block diagram of the cooking device;

FIG. 5 is a flowchart showing the operation of the cooking device.

FIG. 6 is a sectional view of a main part of a temperature detecting means of the heating cooker according to the second embodiment of the present invention.

FIG. 7A is an image diagram showing a driving state of a temperature detecting unit of the cooking device. FIG. 7B is an image diagram showing a driving state of a temperature detecting unit of the cooking device. Image diagram showing driving state

FIG. 8 is a configuration block diagram of the cooking device;

FIG. 9 is a flowchart showing the operation of the cooking device.

FIG. 10 is a configuration block diagram of a conventional heating cooker.

FIG. 11 is a configuration block diagram of another conventional heating cooker.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cooking room 4 Magnetron (heating means) 5 Temperature detection means 25 Switch 30 Heating control means 31 Drive control means 32 Distribution detection drive means 33 Positioning drive means 35 Switching means 36 Switch confirmation means 37 Heat stop judgment means 40 Stopper 41 Drive amount Storage unit 42 Power-on judgment means 43 Heating completion judgment means

Claims (8)

[Claims] A heating means for heating the food; a temperature detecting means for detecting a temperature in a non-contact manner; a drive control means for driving the temperature detecting means for detecting a temperature distribution of the food and its surroundings; Heating control means for controlling the heating means based on the detected temperature distribution, wherein the drive control means is a distribution detection drive means for detecting a temperature distribution, an alignment drive means for performing alignment, and A heating cooker having a distribution detection driving means and a switching means for switching between the positioning driving means. 2. The heating cooker according to claim 1, wherein the switching means has a heating stop judging means for operating the positioning drive means while the heating means is stopped. 3. The cooking device according to claim 1, wherein the switching means has a power-on judging means for operating the alignment driving means when the power is turned on. 4. The cooking device according to claim 1, wherein the switching means has heating completion determining means for operating the positioning driving means when the food heating by the heating means is completed. 5. A switch responsive to the presence of the temperature detecting means is provided at a predetermined position in a driving range of the temperature detecting means, and the positioning driving means has a switch confirming means for confirming the position by a signal from the switch. The heating cooker according to 1. 6. A stopper for regulating a driving range of the temperature detecting means, wherein the positioning driving means has a driving amount storing section for storing a predetermined driving amount for a predetermined positioning,
The cooking device according to claim 1, wherein the temperature detection unit is driven by the driving amount stored in the driving amount storage unit, and a part of the driving part is brought into contact with the stopper. 7. The cooking device according to claim 1, wherein the position at which the positioning is performed is out of the driving range of the distribution detection driving means. 8. The heating cooker according to claim 1, further comprising a cooking chamber for storing food, wherein the positioning is performed at a position where the temperature detecting means does not face the cooking chamber.