JPS59200129A - Cooking device - Google Patents

Abstract

PURPOSE:To prevent a cooking device from cooking without load and from operating in a spark discharge by automatically detecting whether a food to be cooked is contained in a heating chamber or not and whether a ceiling plate is set in the heating chamber or not. CONSTITUTION:Weights of a turntable 14, a tray 15 and a food placed on the tray 15 are applied to a weight sensor 12 through a rotational shaft 13, the output is converted through an analog/digital converter 31 into a digital signal, and supplied to a microcomputer 32. When a user then operates a condition setting key 6 to set a range cooking with high frequency wave, the microcomputer 32 discriminates the presence or absence of the turntable 14 by the stored weight information. When it discriminates no turntable, it does not accepts the operation of starting cooking by the user, but inhibits to perform the oven cooking and simultaneously energizes a lamp to notify the malfunction to the user.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cooking appliance that has a function of measuring the weight of an object to be cooked and automatically performs cooking based on the measured weight.

[Technical background of the invention and its problems]

Conventionally, a cooking device, for example a microwave oven, is equipped with a temperature sensor, humidity sensor, gas sensor, etc., and automatically compares the condition of the food detected by these sensors with a preset cooking program. There is something to cook.

However, changes in the state of food during cooking are completely different depending on the weight of the food, and cooking programs target a predefined weight.
It has been difficult to achieve optimal cooking using only the sensors described above.

Therefore, optimal cooking can be achieved by allowing the user to input the weight of the food and adding the input weight information to the cooking program. However, in this case, the user is required to measure the weight of the food and input information on the measured weight, which is extremely troublesome.

In order to deal with this, if all weight sensors are built into the main body of the microwave oven, and when food is placed in the heating chamber, it will automatically change the subgenus of the food.
It is convenient and eliminates the need for measurement and input work as described above.

By the way, in conventional microwave ovens, when cooking using high frequency, if you mistakenly start cooking when there is no food in the heating range, there is no load! There were times when the product would become unstable and malfunction. There is a heater inside the heating chamber,
Open (or grill) due to the heat generation effect of the heater M
In microwave ovens that enable the ID cooking function, there are cases where a metal enamel top plate is set in the heating chamber and food is placed on the top plate for open (or grill) cooking. If you start and repeat high-frequency microwave cooking with the product set inside the heating chamber, sparks may occur between the inner wall of the heating chamber and the top plate, resulting in malfunction.

[Purpose of the invention]

This invention was made in view of the above circumstances, and its purpose is to automatically determine whether food to be cooked is stored in the heating chamber and whether a top plate is set in the heating chamber. The object of the present invention is to provide an excellent cooking benefit that can be detected automatically, thereby preventing no-load cooking and spark discharge, thereby improving safety.

[Summary of the invention]

This invention takes into consideration the fact that not only the weight of the food to be cooked but also the weight of the food placement plate is applied to the 1-positive sensor, and the presence or absence of the food placement plate is determined based on the detection result of the weight sensor when cooking is performed. However, if there is no placing plate, it is assumed that there is no food to be cooked in the heating chamber, and that a top plate for open grill cooking may have been set, and the cooking is started. This is to prohibit the use of public transportation and to notify the public of the following.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes the main body of a cooking appliance, such as a microwave oven. On the front surface of this main body 1, a door 2 is pivotally supported to be openable and closable, and an operation panel 3 is disposed. A heating chamber 10, which will be described later, is provided within the main body 1 corresponding to the door 2.

The operation panel 3 has a digital display 4. An abnormality notification lamp 5, a condition setting key 6, etc. are provided.

FIG. 2 shows the internal mechanism of the heating chamber and the iti control circuit. That is, in the heating chamber 10, a morph 1 and a weight sensor 12 are sequentially disposed on the back side of the bottom of the heating chamber 10 at positions corresponding to approximately the center of the bottom.

The morph IIVc is engaged with the rotation 14III] 13 so as to be able to move up and down, and the lower end of the rotation shaft 13 comes into contact with the approximate center of the weight sensor 12. The upper end of the rotating shaft 13 is heated
A plate for placing a food to be cooked, so-called a turntable 14, is freely provided at the upper end of the heating chamber lo. Then, a tray 15 is placed on the turntable 14. Therefore, turntable l
4 + The tray 15° and its tray are such that the weight of the food placed on the tray 15 is applied by the rotating shaft 13 to the entire set of N quantity sensors. Moreover, protrusions 16 are formed on both side walls of the heating chamber 10, and a top plate 17 for open grill cooking can be placed in an appropriate set through the protrusions 16. Furthermore, an upper heater 18 is arranged near the ceiling surface in the upper part of the heating chamber 10, and a lower heater 19 is arranged in the lower part between it and the bottom surface of the turntable 14.

One end of a waveguide 20 is connected to the approximate center of the ceiling surface of the heating chamber 10, and a high frequency generator such as a magnetron 21 is attached to the outer periphery of the other end of the waveguide 20.

Then, the antenna 21a of the red sea bream tron 21 is introduced into the waveguide 20.

Thus, the output of the sensor 12 is converted into a digital signal by an analog/digital converter (abbreviated as an A/D converter) 31 and supplied to a microconbeater 32. Further, the output signals of each volatile sensor 33 including a temperature sensor, humidity sensor, gas sensor, etc. are also converted into digital signals by the A/D converter 31 and supplied to the microcomputer 32. The microcomputer 32 has the dizotal display 4. An abnormality display lamp 51, a condition setting key 6, an external memory 34, a power control circuit 35, and the like are connected. Here, the external memory 34 stores a plurality of types of cooking programs corresponding to various cooking menus. The power control circuit 35 operates the upper heater 1B, the lower heater 19 . Power supply control to magnetron 21? I'll list what each one does.

Next, the entire operation of the above configuration will be explained with reference to the flowchart of FIG.

Now, when the user operates the condition setting key 6 and selects one menu, the microcomputer 32 determines whether the selected cooking menu requires weight information, and if necessary, displays the weight information. The weight information from the sensor 12 is input and stored. Next, when the user operates the entertainment setting key 6 to set microwave cooking using high frequency, the microcomputer 32 determines the presence or absence of the turntable 14 based on the stored weight information. That is, if the weight information indicates a weight greater than or equal to the weight of the turntable 14, it is determined that the Kuhntesol is present, and if not, it is determined that the turntable is not present. However, there is a turntable D
'(r) When it is determined, the cooking operation is performed based on the stored weight information and the cooking program corresponding to the cooking menu after accepting the cooking start operation by the user.
A high frequency is generated from the magnetron 21 to perform microwave cooking.

On the other hand, if it is determined that there is no turntable, the cooking start operation by the user is not accepted and execution of Lenz cooking is prohibited. At the same time, all lamps 5 are turned on to notify the user that there is an abnormality.

In other words, if there is no turntable 14,
:, which means that there is no food in it, and the fact that there is no turntable 14 means that there is no oven.
This suggests the possibility that a top plate 17 for grill cooking is set.

In this manner, by prohibiting microwave cooking when the turntable 14 is not present, no-load cooking and spark discharge can be completely prevented. Furthermore, since the user is informed that the turntable 14 is missing, the user can immediately notice the error and perform normal W4 operations.

In the above embodiment, a lamp is used as the alarm, but a buzzer, a sound generator, etc. may also be used.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to automatically detect whether food to be cooked is stored in the heating chamber and whether or not a baking sheet is set in the heating chamber. It is possible to provide an excellent cooker that can improve safety by preventing load cooking and spark discharge.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is an external appearance and a perspective view, FIG. 2 is a schematic diagram of the internal mechanism and control circuit, and FIG. 3 is a flowchart for explaining the entire operation. l...Main body, 10...Heating chamber, 12...1 quantity seven sensor, 14...Turntable (cooked object mounting plate), 2
1... Magnetron (high frequency generator), 33...
microcomputer.

Claims (1)

[Claims] It includes a heating chamber, a high-frequency generator that supplies high-frequency waves into the heating chamber, a food-to-be-cooked food placement plate removably provided in the heating chamber, and a weight sensor that detects the weight applied to the placement plate. In a cooking device that controls cooking according to the weight of the food to be cooked detected by the weight sensor, when cooking is performed, the presence or absence of the above-mentioned placement plate is determined based on the detection result of the weight sensor, A cooking appliance characterized in that it is provided with a means for prohibiting the execution of cooking when it is determined that there is no mounting plate, and a means that notifies everyone when the absence of the mounting plate is detected by this means.