JPH06123431A - Cooking device - Google Patents

Abstract

PURPOSE:To eliminate a troublesome setting of operation of a user when the user sets a preheating stage in a cooking device and improve a convenience in use of the cooking device. CONSTITUTION:There are provided a weight sensor 22 for sensing a presence or a non-presence of a cooked item within a cavity 2; an upper heater 3 and a lower heater 4 for preheating the cavity 2 and cooking cooked items within it; a magnetron 10; a control part 17 for operating the upper heater 3, lower heater 4 and the magnetron 10. It is judged whether or not the cooked items are present in the cavity 2 and if it is judged that the cooked items are not stored in it under an operation of a changing-over part 23, a preheating stage is performed. In addition, if it is judged that the cooked items are stored in it, the cooked items are further cooked, so that when the user sets the preheating stage, it is not necessary to set a troublesome operation and thus it is possible to improve a convenience in use of the cooking device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooking device.

[0002]

2. Description of the Related Art Heretofore, a cooker of this type has been disclosed in Japanese Patent Laid-Open No. 2-1.
It is shown in Japanese Patent No. 36622. When setting the automatic cooking menu, this item executes the preheating process before the automatic cooking if the setting key is pressed an odd number of times, and executes the automatic cooking without executing the preheating process if it is an even number. It is a thing. It should be noted that when the preheating process is executed, the display section indicates that preheating is present.

[0003]

In the above-mentioned conventional example,
When the user sets the preheating process, he or she will set it while looking at the display, but if the display fails and disappears, it will not be known whether the preheating process has been set or not, and preheating will be performed when it is not desired. There is a risk that the process will be executed or not executed when necessary.

The present invention solves this problem.

[0005]

[Means for Solving the Problems] Means of the present invention for solving the above problems include a cavity for accommodating food to be cooked,
A heating unit that preheats the inside of the cavity and cooks the food, a control unit that controls the heating unit, and a switching unit that preheats or cooks the heating unit based on the detection result of the food detection unit. Composed of.

[0006]

In other words, if no food is stored in the cavity, the food detection means detects that fact, and as a result, if it is detected that food is stored, the switching means preheats the heating means. After performing the operation, the cooking operation is subsequently performed. When it is detected that the food is not stored, the switching means immediately performs the cooking operation without the preheating operation by the heating means.

[0007]

1 and 2, 1 is a frame of a microwave oven, 2 is a cavity provided in the frame 1, and 3 is a frame.
Is an upper heater serving as a heating means provided in the upper part of the cavity 2, 4 is a lower heater serving as a heating means also provided in the lower part, and 5 is a dish placed directly above the lower heater 4. A rotary plate, 6 is a motor for rotating the rotary plate 5, 7 is a thermistor for detecting the temperature in the cavity 2, 8 is a gas sensor for detecting the generation of gas such as steam in the cavity 2, and 9 is a cavity. An exhaust duct for exhausting the air inside the tee 2; 10 is a magnetron serving as heating means for generating microwaves; 11 is a fan for cooling the magnetron 10; 12 is a high voltage for outputting a high voltage supplied to the magnetron 10. A transformer 13 is a waveguide for guiding the microwave generated in the magnetron 10 into the cavity 2,
14 is a door for closing the front opening of the cavity 2, 15
Is an operation panel provided on the front surface of the frame 1, and 16 is a display section provided on the operation panel 15.

After cooling the magnetron 10, the cooling air from the cooling fan 11 is blown into the cavity 2 through the ventilation port 2a on the side surface of the cavity 2.

Reference numeral 17 is a control section which serves as control means for controlling preheating and cooking operations, and controls the magnetron 10 and the upper and lower heaters 3 and 4 based on input signals from the setting keys of the operation panel 15, the thermistor 7 and the gas sensor 8. However, the preheating and cooking operations are controlled and executed.

Reference numeral 18 is a relay coil for opening and closing the contacts 19 to connect and disconnect the upper heater 3 and the lower heater 4, 20 is a group of various keys on the operation panel 15, and 21 is a notification of the end of the preheating step and the completion of cooking. The buzzer 22 is a weight sensor that serves as a cooking product detection unit that detects the weight of the cooking product placed on the rotary plate 5.

The control unit 17 includes a weight sensor 2
A switching unit 23 serving as a switching unit for preheating or cooking operation based on the detection result of No. 2 is provided.

That is, when the weight sensor 22 detects 0 g or more, the switching unit 23 determines that the food is placed on the rotary plate 5, and the magnetron 10 and the upper and lower heaters 3,
4 is energized to perform the oven cooking operation, and if 0 g is detected, it is determined that no food is placed on the rotary plate 5, and the upper and lower heaters 3 and 4 are energized to perform the preheating operation. It is a thing.

The operation of oven cooking in such a configuration will be described with reference to FIG. First, in step S1, the oven temperature, oven time, etc. are set by the setting key 17 on the operation panel 15.
And waits until the start key is pressed in step S2.

When the start key is pressed, step S3
In step S4, the weight sensor 22 detects the weight of the food item placed on the rotary plate 5, and in step S4, it is determined whether the detection value of the weight sensor 22 is 0 g or less.

This is to detect whether or not a food item is placed on the rotary plate 5, and if the food item is not placed, the preheating step described later will be executed.

If the switching unit 23 determines that the food is not placed on the rotary plate 5 in step S4, step S5
Proceed to and execute the preheating process.

In step S5, the upper and lower heaters 3 and 4 are energized to heat the inside of the cavity 2. And step S
In step 6, the thermistor 7 detects the temperature F of the inside air, and in step S7 it is determined whether or not the detected temperature F has reached a preset temperature F ₀ . If the set temperature F ₀ is not reached, the operations of steps S5 and S6 are repeated until the set temperature F ₀ is reached.

In step S7, the detected temperature F is set to the set temperature F _0.
Is reached, the energization of the upper and lower heaters 3 and 4 is stopped in step S8, and the buzzer 21 is rung in step S9 to notify the end of the preheating process.

In step S10, it is detected whether the door 14 has been opened or closed. That is, it is to detect whether or not the food is stored in the cavity 2 after the preheating process.

If the door 14 is not opened or closed, step S11
If it is determined that 15 minutes have passed, the oven cooking operation is canceled and the cooking operation ends in step S12.

If the door opening / closing is detected within 15 minutes in step S10, the process waits until the start key is operated in step S13. During this period, the user carries out the operation of putting the food into the cavity 2 heated to the set temperature F ₀ in the preheating step, and operates the start key when the operation is completed.

If the start key is operated in step S13, the upper and lower heaters 3 and 4 and the magnetron 10 are energized to start oven cooking in step S14.

In step S4 before the preheating process, when the switching unit 23 determines that the weight is 0 g or more, that is, the food is placed on the rotary dish 5, the preheating process is omitted and the step S14 is performed. I try to cook in the oven.

When the oven cooking in step S14 is completed, the energization of the upper and lower heaters 3 and 4 and the magnetron 10 is stopped in step S15, and the buzzer 21 is sounded to notify the completion of cooking.

As described above, before starting the preheating step, the weight sensor 22 determines whether or not the food is placed on the rotary plate 5, and if not, the preheating step is started and placed. If so, the cooking operation is automatically started as it is, so that the setting operation which is troublesome for the user can be reduced and the usability can be improved.

In the above-described embodiment, the weight sensor 22 is used to detect whether or not the food is placed on the rotary plate 5.
However, the present invention is not limited to this, and as shown in FIG. 4, the light emitting diode 24 is installed on one side surface of the cavity 2 and the phototransistor 25 is installed on the other side surface. Then, before starting the preheating step, it may be possible to detect whether the phototransistor 25 detects the light of the light emitting diode 24 and determine whether the food is placed on the rotary plate 5.

When the air in the refrigerator is heated by the heater,
As shown in FIG. 5, the inclination of the temperature rise detected by the thermistor 7 is different between the case (a) in which the food is stored in the cavity 2 and the case (b) in which the food is not stored. The presence or absence of the cooked food may be determined by detecting the inclination.

Further, although a microwave oven has been described in the above-mentioned embodiments, the present invention is not limited to this, and can be applied to an electric cooker for heating with a heater or the like.

[0029]

According to the present invention, a cooking product detecting means for detecting the presence or absence of cooking food in the cavity, a heating cooking means for heating the cooking food, and a preheating means for preheating the inside of the cavity with a heater. Since the user has the execution means for operating the heating cooking means or the preheating means based on the detection result of the cooking object detection means, when the user sets the preheating step, there is no need to perform a troublesome setting operation, and the usability is improved. It is what makes me.

[Brief description of drawings]

FIG. 1 is an external view of a microwave oven of the present invention.

FIG. 2 is a schematic configuration diagram of an entire microwave oven of the present invention.

FIG. 3 is an operation flowchart of oven cooking of the present invention.

FIG. 4 is a schematic configuration diagram of another embodiment of the present invention.

FIG. 5 is a diagram showing the relationship between the temperature detected by the thermistor and time.

[Explanation of symbols]

 2 cavity 3 upper heater 4 lower heater 7 thermistor 17 control unit 22 weight sensor 23 switching unit 24 light emitting diode 25 phototransistor

Claims (1)

[Claims] 1. A cavity for accommodating food, a heating means for preheating the inside of the cavity and cooking the food, a control means for controlling the heating means, and a detection result of the food detection means. A cooking device comprising switching means for preheating or heating the heating means based on the above.