JP2661366B2 - High frequency heating equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-frequency heating apparatus provided with a weight sensor, a gas sensor, a blower, and the like.

2. Description of the Related Art In general, a high-frequency heating device configured to perform automatic cooking of warming using a gas sensor performs heating while sending air to a heating chamber, and detects heat generated from an object to be heated by a gas sensor to perform heating. Was.

Problems to be Solved by the Invention However, in the configuration of the conventional high-frequency heating device described above, when heating a small amount of an object to be heated, it is difficult to detect a minute change in water vapor with a gas sensor, and the change in water vapor is correctly detected. There was a tendency that the object to be heated was overheated without being detected. This is because the steam generated from the object to be heated is diffused because the air is sent to the heating chamber, and is not detected by the gas sensor.

An object of the present invention is to solve such a conventional problem, and it is an object of the present invention to provide an excellent high-frequency heating apparatus that does not overheat the object to be heated even when the amount of the object to be heated is small. .

Means for Solving the Problems In order to achieve the above object, the present invention provides a heating chamber for heating an object to be heated, a high-frequency generating means for heating the object to be heated coupled to the heating chamber, A weight sensor for detecting the weight of the object, a gas sensor for detecting water vapor or gas generated from the object to be heated, a blowing unit for blowing air into the heating chamber, and the high frequency generating unit based on signals from the weight sensor and the gas sensor. A control unit for controlling power supply to the blower and a key for instructing automatic cooking of the object to be heated, and when the automatic cooking is started by input of the key, the control unit is configured to control the gas sensor. When the heating is stopped by the signal of, the weight of the object to be heated is less than a predetermined weight, the weight obtained from the weight sensor, the time from the start of cooking to the stop of the blowing means, and It is configured to stop and calculate the time and stop the blowing means.

According to the present invention, when the weight of the object to be heated is less than the predetermined weight, the blowing means is stopped for a predetermined time, and during that time, the steam generated from the object to be heated is diffused by the wind. There is no. Therefore, the concentration of the generated steam is increased, and the detection accuracy of the steam by the gas sensor can be improved.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

As shown in the block diagram of the high-frequency heating device in FIG.
In a heating chamber (not shown), a high-frequency generating means 1 for heating an object to be heated (not shown), a weight sensor 2 for detecting a weight by placing the object to be heated, and heating and cooking by the high-frequency generating means 1 A gas sensor 3 for detecting the degree of water vapor or gas generated during the operation.

In addition, the apparatus has a blowing means 4 for blowing air to the object to be heated to improve the heating state. The signals from the weight sensor 2 and the gas sensor 3 are used to warm up the blowing means 4 and the high frequency generating means 1 based on an input of a key 5. There is provided a control unit 6 for controlling power interruption and power interruption.

Then, when the user operates the key 5 to instruct cooking,
The designated cooking can be performed automatically.

Next, the operation of the above configuration will be described with reference to FIG. 2 and FIG.

As shown in the flowchart of FIG. 2, a warm key 5 is input to start heating (step 1).
The heating is started and the weight of the object to be heated is measured by the weight sensor 2 (step 2), and it is determined whether the weight W is less than an arbitrary weight Eg (step 3). If less than Eg, that is, a small amount, TO = A × W + B (A and B are coefficients), TR = C × W
+ D (C and D are coefficients) is calculated (step 5).

At this time, TO is the time from the start of heating to the stop of the air blow, and TR is the time to stop the air blow, as can be seen from the graph of the relationship between the air blow output and time in FIG. 3 (a). Weight
When the air flow is equal to or higher than Eg, the heating is insufficient when the air blowing is stopped. Therefore, the air blowing is kept operated from the start to the end of the heating. Therefore, TO is set to an infinite value, and TR is set to 0 second (step 4).

When the calculation of TO and TR is completed, the heating is started and the blowing is operated (step 6). When the heating is started, it is determined whether or not the water vapor generated from the object to be heated is detected by the gas sensor 3 (step 7).
Is stopped (step 14), the blowing means 4 is stopped (step 15), and the heating ends (step 16).

If water vapor has not been detected, it is determined whether or not TO seconds have elapsed (step 8).
Count down seconds (Step 11), Step 7
Return to If TO seconds have elapsed, it is determined whether TR seconds have elapsed (step 9). If TR seconds have not elapsed, the countdown of TR seconds is performed (step 12), and the blowing means is stopped (step 13). Return to step 7. If TR seconds have elapsed, the air blowing means is operated (step 10), and the process returns to step 7. By performing such an operation, a graph of the relationship between the blowing output and time as shown in FIG. 3A is obtained. FIGS. 3B and 3C show the high-frequency output corresponding to FIG. 3A and the absolute humidity of the steam generated from the object to be heated. Δh is the amount of change in the absolute humidity, and the gas sensor 3 detects Δh as cooking progresses, and the high-frequency generator 1 and the blower 4
To stop.

As described above, by performing the above operation, automatic cooking without overheating can be performed even when the amount of the object to be heated is small.

Advantageous Effects of the Invention As is clear from the above description, according to the high-frequency heating device of the present invention, in the case of a small amount of the object to be heated, the blowing is stopped and the air does not enter the heating chamber, so that the object is generated from the object to be heated. Even if water vapor is not diffused and only a small amount of heat is generated due to the small amount of material to be heated, the generated steam can be detected with high precision, enabling excellent automatic cooking without overheating the cooking. Become.

In addition, even for a large number of objects to be heated, it is possible to realize good-quality cooking without insufficient heating.

[Brief description of the drawings]

FIG. 1 is a block diagram of a high-frequency heating device according to an embodiment of the present invention, FIG. 2 is a flowchart showing the operation of the high-frequency heating device, and FIG. 3 (a) shows the relationship between the blowing output of the blowing device and time. FIGS. 3 (b) and 3 (c) are explanatory diagrams of FIG. 3 (a).
FIG. 6 is a diagram showing a relationship between a high-frequency output corresponding to the above and time of an absolute humidity. 1 high frequency generating means, 2 weight sensors, 3 gas sensors, 4 air blowing means, 5 warming keys (keys), 6 control units.

Claims (1)

(57) [Claims] A heating chamber for heating the object to be heated; a high-frequency generator coupled to the heating chamber for heating the object to be heated; a weight sensor for detecting a weight of the object to be heated; A gas sensor for detecting water vapor or gas generated from an object, a blowing means for blowing into the heating chamber, the high-frequency generating means based on signals from the weight sensor and the gas sensor, and a control for controlling power supply to the blowing means. Unit, and a key for instructing automatic cooking of the object to be heated, when the automatic cooking is started by the input of the key, the control unit, when stopping the heating by the signal of the gas sensor, the When the weight of the object to be heated is less than a predetermined weight, a time from the start of cooking to a stop of the blowing means and a time during which the blowing means are stopped are calculated based on the weight obtained from the weight sensor, and the blowing means High-frequency heating apparatus that is stopped.