JPH05312333A - Heat-cooking apparatus - Google Patents

Abstract

PURPOSE:To heat-cook simultaneously foodstuffs for which heating time required is different by discriminating the foodstuffs for which heating time required is different and positioning the foodstuffs requiring a long period of cooking time in the vicinity of heating means. CONSTITUTION:The heat-cooking apparatus has electric heaters 3, 6 for heating foodstuffs to be heated in a heating chamber, a tray 8 on which the foodstuffs are set and which is provided rotatably, a drive motor 9 for rotatably driving the tray 8, menu selection keys for simultaneously heat-cooking a plurality of foodstuffs for which heating time required is different, and a light source 4 for irradiating the foodstuffs with visible rays of light. A light-receiving element 11 is provided which receives the visible rays of light reflected by the foodstuffs irradiated from the light source 4 and outputs detection signals corresponding to luminous intensity of the reflected light. A control unit is provided which discriminates a plurality of foodstuffs on the basis of the detection signals from the light-receiving means 11 and controls the drive motor 9 to position the foodstuffs which require a long period of cooking time in the vicinity of the electric heaters 3, 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating means for heating an object to be heated in a heating chamber, a rotatably mounted tray on which the object to be heated is placed, and a drive device for rotationally driving the tray. The present invention relates to a heating cooker consisting of.

[0002]

2. Description of the Related Art Conventionally, in a heating cooker such as an electric oven, a gas oven or a microwave oven with an electric heating device, when an object to be heated stored in a heating chamber is heated and browned, the object to be heated is placed on a saucer. There are two types, one is placed and heating is performed with the saucer fixed, and the other is that the saucer is rotatable and heated.

Particularly, in the case of performing high frequency heating, in many cases, the saucer is rotatable in order to uniformly perform high frequency heating, and in many cases, the saucer is also rotatable during heating by an electric heating device. In this case, for example, since the electric heating device for browning the bread is often provided at a position slightly off the center of the plane of the heating chamber, when two breads are placed on the saucer for heating. In the case where the saucer is fixed, the portion near the electric heating device is quickly browned, and the portion far from the electric heating device is hard to be browned, so that uniform cooking cannot be performed.

Further, in the case where the saucer is rotated and cooked, the two breads alternately pass in the vicinity of the electric heating device, so that the cooked food can be uniformly browned and excellently cooked.

[0005]

By the way, the conventional heating cooker cannot simultaneously heat a plurality of objects to be heated which require different heating times for optimum cooking finish.

However, in the case where the saucer is rotated and cooking is performed as described above, when a plurality of objects to be heated having different heating times are simultaneously heated, for example, an egg and a bread to be cheerfully divided are used. When cooking with heat from an electric heating device (electric heater), if cooking is done while rotating the saucer, eggs and bread will alternately pass near the heating device, and heat will be evenly transmitted to both. Therefore, the bread is heated faster and gets browner more quickly, and the bread is cooked earlier than the eggs, but the eggs remain unheated, so objects to be heated with different heating times should be used. It was not possible to cook at the same time.

The present invention has been made in view of the above problems, and the objects to be heated having different heating times are discriminated and the objects to be heated having a long cooking time are positioned in the vicinity of the heating means. The object is to enable cooking of different objects to be heated at the same time.

[0008]

In order to achieve the above object, the heating cooker of the present invention is provided with a heating means for heating an object to be heated in a heating chamber, and the object to be heated is rotatably mounted. A position for detecting the position of the object to be heated, provided with a saucer provided, a drive device for rotationally driving the saucer, and a menu selection means for simultaneously heating and cooking a plurality of objects having different heating times. A control unit is provided which detects the plurality of objects to be heated based on the detection result of the position detecting means and controls the driving device to position the object to be heated having a long cooking time in the vicinity of the heating means. It is provided.

Further, a light source for irradiating the object to be heated with visible light is provided, the visible light emitted from the light source and reflected by the object to be heated is received, and a detection signal corresponding to the illuminance of the reflected light is output. The light receiving means is provided, and the above-mentioned control section is provided for judging the cooking state of the object to be heated by the detection signal from the light receiving means and controlling the energization to the heating means.

[0010]

The above-mentioned heating cooker discriminates a plurality of objects to be heated based on the detection result of the position detecting means, and controls the driving device to position the objects to be heated having a long cooking time in the vicinity of the heating means. A large amount of heat is transferred to the object to be heated for a long cooking time to perform heating and cooking, and the object to be heated for a long cooking time and the object to be heated for a short cooking time are simultaneously heated and cooked.

Further, the visible light emitted from the light source and reflected by the object to be heated is received by the light receiving means, the cooking state of the object to be heated is judged from the detection result of the light receiving means, and the energization to the heating means is controlled. To finish the heated object in a good cooking condition.

[0012]

The present invention will be described in detail below with reference to the embodiments shown in the drawings. FIG. 1 is an internal perspective view of the microwave oven with a toaster function, which is the heating cooker of the present invention, with the outer shell removed.
2 is a sectional view of FIG. 1 seen from the front, and FIG. 3 is a sectional view of FIG. 1 seen from the side.

In the microwave oven of the present invention, an electric heater 3 which is a heating means for heating an object to be heated is provided behind the center of the ceiling 2 of the heating chamber 1 of a box made entirely of metal. At the same time, a light source 4 for irradiating an object to be heated with visible light is arranged in front of the electric heater 3, and an electric heater 6 is arranged behind the center of a bottom plate 5 of the heating chamber 1, and the bottom of the heating chamber 1 is arranged. Further, a tray 8 having a roller 7 for placing an object to be heated is rotatably provided, and a drive motor 9 for rotationally driving the tray 8 is provided. The tray 8 is formed in a mesh shape so that both sides of the object to be heated are charred when the object to be heated is cooked by the electric heaters 3 and 6.

The side wall of the heating chamber 1 is provided with a magnetron 10 for irradiating the object to be heated on the pan 8 with microwaves in the case of microwave heating, and the object to be heated is reflected on the back side of the magnetron 10. The light receiving element 11 that receives the visible light and detects the illuminance of the visible light is provided.

FIG. 5 is a diagram showing the configuration of the above-mentioned microwave oven control device. The control unit 12 controls the electric heaters 3 and 6 and the drive motor 9, and the control unit 12 is provided with a plurality of heated objects having different heating times. A menu selection key for heating and cooking an object, for example, a morning key 13 for simultaneously heating and cooking bread and eggs, and an operation unit 15 having a cooking start key 14 are provided, and the operation unit 15, the light receiving element 11, and a control unit are provided. 12 is connected via the interface 16, the electric heaters 3 and 6 and the drive motor 9 are connected, and the electric heaters 3 and 6 and 6 are driven by signals from the operation unit 15 and the light receiving element 11.
The control unit 12 controls the drive motor 9 to perform heating and cooking.

2 and 3, during microwave heating by the magnetron 10, the pan 8 is constantly rotated by the drive motor 9 so that the object to be heated is uniformly heated by the microwaves, and is uniformly heated. Heating.

On the other hand, when cooking with the electric heaters 3 and 6, for example, when simultaneously cooking with one loaf of bread 17 and eggs 19 divided in the container 18, the saucer 8
When the container 18 containing the bread 17 and the egg 19 is placed on the container as shown in FIG. 4 and heating is started at the same time, the bread 17 is cooked faster than the egg 19. And so that the eggs 19 are heated by a larger amount of heat than the bread 17, and when the eggs 19 are cooked to a certain extent, the saucer 8 is rotated to end the cooking at the same time.

Egg 19 placed in container 18 as described above
In order to position the egg in the vicinity of the electric heaters 3 and 6, it is necessary to detect the position of the egg 19 by rotating the pan 8 at least once after starting heating.

In order to detect the position of the egg 19 and position the egg 19 in the vicinity of the electric heaters 3 and 6, the light receiving element 11 is arranged in the vicinity of the electric heater 3 and the light receiving element 11 is arranged. Then, the illuminance of visible light reflected by the egg 19 is detected to detect the position of the egg 19. That is, bread 17
Is higher than the illuminance of visible light reflected by the bread 17 when the egg 19 passes through the back side of the heating chamber 1 (near the electric heaters 3 and 6). The illuminance of visible light reflected by the egg 19 becomes darker. This is because the white portion of the egg 19 is transparent when the egg 19 is not cooked, and the visible light reflected on the surface of the egg 19 is small. Therefore, the illuminance of the reflected visible light is reduced. By detecting, the bread 17 and the egg 19 can be discriminated.

FIG. 6 shows a circuit in which cadmium sulfide CdS, which is a photoconductive element having a smaller resistance value as the illuminance received is brighter, is used as the above-mentioned light receiving element 11.
This circuit has a resistor R1 and the other end of CdS11 whose one end is grounded.
Are connected in series, and the voltage Vc is applied to the other end of the resistor R1. The other end of the CdS 11 is connected to the input port An of the control unit 12 (the interface 13 is omitted) via the filter 18 including the resistor R2 and the capacitor C2. Therefore, if the resistance value Rc of the CdS 11 decreases, the input voltage to the control unit 12 decreases accordingly.

FIG. 7 is a voltage characteristic diagram showing a change in the input voltage to the control unit 12 when the bread 17 and the eggs 19 are placed on the saucer 8 and the saucer 8 is rotated. During rotation, this input voltage undergoes a change indicating a voltage value A and a voltage value B. Then, the drive motor 9 for rotating the tray 8
By using a synchronous motor as the above, the number of revolutions can be determined in synchronization with the power supply frequency, and the time required to rotate the tray 8 once can be made constant.

That is, the above voltage value A indicates when the bread 17 has passed near the electric heaters 3 and 6, and a voltage value B higher than this voltage value A indicates that the egg 19 is near the electric heaters 3 and 6. When passing, the egg 19 can be stopped at a position near the electric heaters 3 and 6 by stopping the drive motor 9 after a fixed time from when the voltage value B is shown.

As described above, when the bread 17 and the egg 19 are heated and cooked at the same time, the pan 8 is first rotated once and the input voltage (detection signal) from the light receiving element (CdS) 11 to the controller 12 is applied. The position of the egg 19 is detected, and the drive motor 9 is stopped after a certain period of time from when the input voltage shows the voltage value B, so that the egg 19 is automatically heated by the electric heater 3.
And, the egg 19 is stopped at a position near 6 and 6, and the egg 19 is given more heat than the bread 17 to cook.

Then, as the cooking progresses and the white portion of the egg 19 solidifies, the illuminance of visible light reflected from the surface of the egg 19 gradually increases and the input voltage to the input port of the control unit 12 gradually increases. Is getting lower. When the input voltage reaches a predetermined value, the pan 8 is rotated again so that the loaf 17 and the egg 19 alternately pass near the electric heaters 3 and 6, so that the loaf 17 and the egg 19 are simultaneously made good. Cook to finish.

In the above embodiment, the light source 4 is connected to the ceiling 2 of the heating chamber 1.
Although it may be provided on the bottom plate 5 of the heating chamber 1 as shown in FIG. 8, when the light source 4 is provided on the bottom plate 5, the detection result of the light receiving element 11 shows that the receiving tray 8 has a mesh shape. Since it is formed, as shown in FIG. 9, since the visible light is blocked by the loaf bread 17 and the container 18, the portion where the loaf bread 17 and the container 18 in which the egg 19 is placed is located is not received and remains OFF. Visible light is blocked by the mesh-shaped tray 8 so that the portion where the bread 17 and the container 18 are not located is repeatedly turned on and off. Therefore, when the bread 17 and the container 18 are placed on the tray 8, FIG. It becomes a signal like
When the bread 17 is passing over the light source 4, it is turned off during the time Ta, and when the container 18 is passing over the light source 4, it is turned off during the time Tb. Since it is smaller, the time Tb is shorter than the time Ta, and it is possible to discriminate between the loaf 17 and the container 18 based on this time, and the rotation of the tray 8 is controlled based on this determination result to perform heating and cooking.

In the above embodiment, the bread 17 and the egg 19 are also used.
When the and are simultaneously heated, the bread 17 and the egg 19 are distinguished from each other, and the egg 19 is heated by the electric heaters 3 and 6 at the beginning of cooking.
The egg 19 is cooked faster than the bread 17 in the vicinity of the pan 17, but the pan 8 and the egg 19 are detected by the light receiving element 11 while the pan 8 is constantly rotated. Alternatively, when the bread 17 is cooked in a good state, the user may be informed of that fact, and the user may take out the bread 17 from the heating chamber 1 and then continue to cook the eggs 19.

[0027]

EFFECT OF THE INVENTION Since the heating cooker of the present invention is constructed as described above, it is possible to heat and cook a plurality of objects to be heated having different cooking times at the same time. Can be finished.

Further, the light receiving means for detecting the position of the object to be heated can be used to detect the finished state of the object to be heated, and good cooking can be performed easily with a small number of parts.

[Brief description of drawings]

FIG. 1 is an internal perspective view showing an embodiment of a heating cooker of the present invention.

FIG. 2 is a cross-sectional view of the heating cooker according to the present invention as viewed from the front.

FIG. 3 is a cross-sectional view of a heating cooker according to the present invention as seen from a side surface.

FIG. 4 is a plan view showing a pan 8 of the heating cooker according to the present invention.

FIG. 5 is a circuit diagram showing a controller of the heating cooker according to the present invention.

FIG. 6 is a main part circuit diagram showing a light receiving element 11 of the heating cooker according to the present invention.

FIG. 7 is a voltage characteristic diagram showing an input voltage to the control unit 12 of the heating cooker according to the present invention.

FIG. 8 is a cross-sectional view of a heating cooker according to another embodiment of the present invention as seen from the front.

FIG. 9 is a light receiving element 1 of a cooking device according to another embodiment of the present invention.
It is a characteristic view which shows the detection signal of 1.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 heating chamber 3 electric heater 4 light source 6 electric heater 8 saucer 9 drive motor 11 light-receiving element 12 control unit 17 bread 19 egg

Claims (2)

[Claims] 1. A heating cooker comprising: heating means for heating an object to be heated in a heating chamber; a rotatably provided tray on which the object to be heated is placed; and a drive device for rotationally driving the tray. Menu selection means for simultaneously heating and cooking a plurality of objects to be heated having different heating times, position detecting means for detecting a position on the object to be heated, and a plurality of objects to be heated based on the detection result of the position detecting means. A heating cooker, which is provided with a control unit for determining an object and controlling the driving device to position an object to be heated, which has a long cooking time, in the vicinity of the heating means. 2. The heating cooker according to claim 1, wherein the position detecting means receives a light source that irradiates the object to be heated with visible light, and receives visible light emitted from the light source and reflected by the object to be heated. And a light receiving means for outputting a detection signal according to the illuminance of the reflected light, the cooking state of the object to be heated is judged by the detection signal from the light receiving means, and the energization to the heating means is controlled. A cooking device characterized by having a section.