JP2601115Y2 - Cooker - Google Patents

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 cooking food by placing food in a turntable provided rotatably in a heating chamber and stopping the food at a position where the food can be easily taken out when the cooking is completed. is there.

[0002]

2. Description of the Related Art A conventional heating cooker stores the time required for a turntable rotatably provided in a heating chamber to make one rotation, and at the end of heating cooking, the position where the food is first placed (the original position). Position), the turntable is stopped at a time obtained by multiplying the time required for one rotation by an integer as described above.

[0003]

When the cooking device having the above structure is used in an area having a different power frequency, the number of rotations of the turntable changes, the time required for one rotation varies, and the food is placed at the original position. Will not stop.

When a very heavy food is placed on the turntable or when the power supply voltage fluctuates, the rotation speed of the turntable changes, and the food does not stop at the original position as described above.

[0005]

SUMMARY OF THE INVENTION The present invention provides a turntable rotatably provided in a heating chamber, heating means for heating food placed on the turntable, and an openable and closable opening in the heating chamber. A door provided, a light source for irradiating the food with light, light detecting means for detecting light from the light source reflected by the food, and cooking by detecting a brown spot of the food based on a result of the light detecting means. And a control unit for controlling the turntable, wherein the light detection means determines the position of the food based on a result of detection of the reflected light of the food, which is changed by rotation of the turntable. Characterized in that the cooking device further comprises a turntable stopping means for stopping the heating cooker at a predetermined position.

In the present invention, the position of the food is determined by the method described above.
Periodic output change characteristics in detection result of reflected light of food
It is a heating cooker characterized by using .

In the present invention, the position of the food is determined by heating.
Using the detection result of the reflected light of the above food after cooking is completed
A cooking device characterized by being a cooking device .

In the heating cooker having the above-described configuration, when food is placed on the turntable and heating is started, the food is heated by the heating means while the turntable is rotated.
Then, light is applied to the food from the light source, and the reflected light from the food is detected by the light detection means. When the detection result by the light detection means reaches a predetermined value, the control unit stops the heating means, and the light detection Based on the detection result of the means, the turntable stopping means judges the position of the food and stops the turntable, and stops at a predetermined position (a position where the food is easily taken out, that is, on the door side).

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the cooking device of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic sectional view of an embodiment of the cooking device of the present invention. In FIG. 1, 1 is a heating chamber,
2 is a turntable rotatably provided in the heating chamber, 3 is a turntable drive motor for driving the turntable 2 to rotate, 4 is a heater serving as heating means installed on the ceiling of the heating chamber 1, 5 is a bread which is a food placed on the turntable 2, 6 is an interior light which is a light source for illuminating the inside of the heating chamber 1 and irradiating the bread 5 with light,
Reference numeral 7 denotes an optical sensor as light detecting means for detecting light reflected from the bread 5. The optical sensor 7 uses a cadmium sulfide (CdS) element whose resistance changes according to the illuminance of light.

FIG. 2 is a circuit diagram of the cooking device of the present invention. In this figure, an operation panel 8 has operation keys 9 such as a key for starting heating cooking and a cooking mode key for setting a type of cooking.

Reference numeral 10 denotes a microcomputer (hereinafter, referred to as a microcomputer), which includes the optical sensor 7 and the resistor 1.
The relay 13 is controlled by a detection signal from the light detection circuit 12 consisting of 1 to control the energization of the heater 4.

The position of the bread 5 is determined based on the detection signal of the light detection circuit 12, and the relay 14 is controlled so that the bread 5 is stopped at a position where the bread 5 can be easily taken out. The rotation of the turntable 2 is stopped by cutting off the power supply.

The operation of the cooking device having the above configuration will be described.
First, the bread 5 is placed on the turntable 2 and the operation keys 9 on the operation panel 8 are operated to start heating and cooking.

Then, the microcomputer 10 sets the relay 13,
By controlling the heater 14, the turntable driving motor 8 and the interior light 6 are energized to rotate the tantable 2 to heat and cook the bread 5 by the heater 4, and the interior light 6 emits light to the bread 5. Irradiate.

When the detection signal of the light detection circuit 12 detecting the light reflected from the bread 5 reaches a predetermined value, the surface of the bread 5 is scorched, and the relay 13 is controlled. Open the contact 13a and release the heater 4
Cut off the power supply to.

Thereafter, based on the detection signal of the light detection circuit 12, the position of the bread 5 is determined, and the relay 14 is controlled so as to stop at a position where the bread 5 can be easily taken out. To turn off the power supply to the turntable drive motor 8 and stop the rotation of the turntable 2.

The determination of the position of the loaf of bread 5
The position of A, B, C, and D shown in FIG. 3 indicates that the output of the detection signal of the light detection circuit 12 is the point A, the point B shown in FIG.
It changes like points C and D.

This is because the distance from the light sensor 7 changes according to the position of the bread 6, the illuminance received by the light sensor 7 changes, and the resistance value of the light sensor 7 changes.

Therefore, when the detection signal of the light detection circuit 12 becomes the output at the point A, the power supply to the turntable drive motor 3 is cut off to stop the turntable 2, thereby making the bread 5 Can be stopped at a position where it can be easily taken out, that is, at the door side (position A in FIG. 3).

[0021]

The cooking device of the present invention has the above-described configuration, so that the food can be accurately stopped at a predetermined position even if the rotation speed of the tantable changes due to a difference in the power supply frequency or the weight of the food. Even if the food is placed at a different position at the start of cooking, the food can always be stopped at a predetermined position.

Further, the light detecting means can be used in common for the detection of the position of the food and the detection of the burntness of the food, and good heating can be performed without increasing the number of parts.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing an embodiment of the cooking device of the present invention.

FIG. 2 is a circuit diagram of the cooking device of FIG. 1;

FIG. 3 is a plan view of the turntable of FIG. 1;

FIG. 4 is an output characteristic diagram of the photodetector circuit of FIG. 2;

FIG. 5 is a time chart showing (a) energization of a heater and (b) a time chart showing energization of a turntable drive motor of the cooking device of FIG. 1;

[Explanation of symbols]

 1: heating room 2: turntable 3: turntable drive motor 4: heater 5: bread pan 6: interior light 7: light sensor 10: microcomputer 12: light detection circuit

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F24C 7/04 301 F24C 7/02 330 F24C 15/16 H05B 6/78

Claims (3)

(57) [Scope of request for utility model registration] 1. A turntable rotatably provided in a heating chamber, heating means for heating food placed on the turntable, a door provided in the heating chamber so as to be openable and closable, A light source for irradiating the food, light detection means for detecting light from the light source reflected by the food, and a control unit for controlling the cooking by detecting the brown of the food based on the result of the light detection means. In the heating cooker, the light detecting means determines a position of the food and stops the turntable at a predetermined position based on a result of detection of reflected light of the food that changes by rotation of the turntable. A cooking device comprising a stopping means. 2. The method according to claim 2, wherein the position of the food is determined by a reflected light of the food.
Using periodic output change characteristics in detection results
The cooking device according to claim 1, wherein 3. The method according to claim 1, wherein the position of the food is determined after the cooking.
Using the detection result of the reflected light of the above food in
3. Cooking according to claim 1 or 2, characterized in that:
vessel.