JPH0451489A - High frequency heating device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a high frequency heating device used for cooking.

2. Description of the Related Art Conventional high-frequency heating devices of this type generally include means for detecting abnormalities in the high-frequency generating means. The configuration will be explained below with reference to FIG.

As shown in the figure, a high voltage circuit 2 that applies high voltage to the magnetron 1 is connected to a magnetron 1 that generates high frequency waves, and the high voltage circuit 2 receives power from an AC power source 4 by a message from a control section 3. A switching circuit 5 is connected to turn on and off the supply of. In addition, the high voltage circuit 2
A current detection means 6 for detecting the current flowing in the DJ is provided,
The current detecting means 6 is connected to a current value determining means 7 that converts the current detected by the current detecting means 6 into a voltage for making a determination by an abnormality detecting function provided in the control section 3.

Problems to be Solved by the Invention However, in the configuration of such a conventional high-frequency heating device, the means for detecting an abnormality in the high-frequency generating means is different for each model, and cannot be shared in one configuration, making it difficult to expand the model. etc., there were problems such as the internal configuration of the current value determining means having to be changed for each model.

The present invention solves the two-part problem, and aims to provide a high-frequency heating device that can be used in two configurations to detect abnormalities in the high-frequency generating means even if the model is expanded.

Means for Solving the Problems - In order to achieve the object, the high frequency heating device of the present invention includes a magnetron, a high voltage circuit connected to the magnetron, and a switching circuit connected to the high voltage circuit and an AC power source. , comprising a current detection means provided at the high voltage, a current value determination means connected to the current detection means, and a control section connected to the current value determination means, the control section connected to the control section. By inputting the output of the model switching generation means provided in The structure is such that the switching circuit is turned off to stop the generation of high frequency waves from the magnetron.

As described above, by providing a model switching generating means in the control section equipped with an abnormality detection function, the present invention makes it possible to detect abnormal currents from high voltage circuits corresponding to each model, and can detect a plurality of abnormal currents with one configuration. It becomes possible to detect abnormalities in the high frequency generation means of the model.

EXAMPLE An example of the present invention will be described below with reference to FIGS. 1 and 2.

As shown in the figure, a high voltage circuit 9 that applies high voltage to the magnetron 8 is connected to the magnetron 8 that generates high frequency waves for heating food. A switching circuit 12 is connected to turn on/off the supply of power.

The high voltage circuit 9 is provided with a current detection means 13 for detecting the current flowing through the high voltage circuit 9, and the current detected by the current detection means 13 is transmitted to the control unit
A current value determining means 14 is connected to the current value determining means 14 for converting the voltage into a voltage for determination by an abnormality detection function provided in each model. Then, the control section 10 has a model switching generating means 1 that causes the control section 10 to determine what model it is.
5 is connected.

Further, as shown in FIG. 2, for example, when there are two types of models, if the abnormal current to the model is 11 or more and the abnormal current to model B is 12 or more, the determination voltage of the abnormality detection function of the control unit 10 is is 71 or higher for model A, and ■2 for model fliB.
That's all.

In the above configuration, if there is an abnormality in the high voltage circuit 9, an abnormal current of 11 or more flows in model A and 12 or more in model B. Therefore, the abnormal current is detected by the current detection means 13, and the detected current is converted into a current value. The determination means 14 converts it into a voltage and inputs it to the control unit 10. The control unit 10 determines whether the input voltage is model A or model B based on the signal from the model switching generating means 15, and if the input voltage is model A, the input voltage is 7.
1 or more, or 72 or more in the case of model B, it is determined that there is an abnormality, and the switching circuit 12 is turned off to prevent the power of AC power #1 from being supplied to the high voltage circuit 9. It is possible to stop the generation of high frequency waves from the magnetron 8.

Effects of the Invention As is clear from the description of the embodiments above, in the high-frequency heating apparatus of the present invention, the following effects can be obtained by providing the model switching generating means in the control section.

In other words, the input from the current value determining means is determined by the abnormality detection function of the control unit that corresponds to each model based on the signal from the model switching generating means, so there is no need to change the configuration for each model. With this configuration, it is possible to detect abnormalities in the high frequency generation means of multiple models. For this reason, equipment can be shared during model expansion, and design and manufacturing can be streamlined.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a high-frequency heating device according to an embodiment of the present invention, Fig. 2 is a characteristic diagram showing the relationship between detection current and judgment voltage of the same high-frequency heating device, and Fig. 3 is a block diagram of a conventional high-frequency heating device. It is a block diagram. 8.9... Magnetron, high voltage circuit (high frequency generation means), 10... Control section, I3... Current detection means, 14... Current value determination means, 15. ...
・Method of generating heat depending on the model.

Claims (1)

[Claims] A high frequency generating means for generating high frequency waves for heating food, a current detecting means for detecting a current flowing through the high frequency generating means, a current value determining means connected to the current detecting means, and a current value determining means from the current value determining means. and a control section that controls the output of the high frequency generation means, and the control section inputs the output from the model switching generation means connected to the control section, thereby controlling the output of the high frequency generation means. and detecting the output from the current value determining means based on the respective determination values for the plurality of models;
The high frequency heating device is configured to stop the operation of the high frequency generating means when it is determined that there is an abnormality.