JPS59712Y2 - Induction heating device display device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a display device for an induction heating cooker.

In the conventional induction heating device, that is, the induction heating cooker, as shown in Japanese Patent Laid-Open No. 50-79843 (published on June 28, 1975), there is a possibility that food may be accidentally placed in the heating section. In order to prevent small objects such as spoons or kitchen knives from heating up, a protection circuit is installed to prevent small objects from heating, and a suitable pot is installed to prevent equipment failure when a non-magnetic pot is placed. Equipped with a protection circuit to detect the presence or absence.

Furthermore, as seen in Japanese Patent Application Laid-Open No. 50-84373 (published on July 8, 1975), safety is improved by providing overheating protection means to prevent dangers caused by dry cooking.

Since these cooking appliances do not contain any flames, various protection circuits have been conventionally provided to prevent such dangers from occurring.

In other words, the protection circuit is activated when the power switch of the device is turned on and the pot is placed on the heating section, but the material or size of the pot is not suitable, or when the pot is overheated and its temperature becomes too high. Although heating is automatically prohibited, there is a need to notify the user in an easy-to-understand manner whether or not the condition of the pot being used is normal.

On the other hand, since the power control changes depending on the material of the load pot, it is impossible to display the approximate wattage of input depending on the position of the knob when using a commercially available pot.

In other words, in the past, a dedicated pot was attached, and there was a strong correlation between the power absorbed by the pot and the position of the power control knob. If the cooking method is not limited to the above, a large difference may occur between the position of the knob and the actual power absorbed by the pot, making it impossible to cook in the optimum heating state.

This invention solves the above-mentioned conventional problems by displaying that the heating operation is in progress and displaying the amount of heating, and providing information to the user so that the user can perform operations suitable for cooking. It is.

In order to achieve the above object, the present invention includes display means for displaying the amount of heating and light emitting means for displaying that the heating operation is in progress.

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

In FIG. 1, 1 is an AC power source, and 2 is a means for detecting an input terminal having a correlation with the absorbed power of the pot 5, which is constituted by a current transformer.

Reference numeral 3 denotes an induction heating power supply device, the output of which is connected to a heating coil 4, through which heating current flows, and the pan 5 is heated by induction.

Here, the induction heating power supply device 3 includes a protection circuit, which supplies heating current to the heating coil 4 during normal times, and prohibits energization to the heating coil 4 by a signal generated during abnormal times.

To detect whether the heating coil 4 is energized,
Although various means are possible, in the embodiment shown in FIG. 1, the detection is performed using a coil 6 electromagnetically coupled to the heating coil 4.

That is, the heating coil 4 is electromagnetically coupled to the coil 6, and an electromotive force is generated in the coil 6 only when a heating current is flowing.The electromotive force operates the driving circuit 9 of the light emitting means 10 consisting of a light emitting element. 10 lights up.

On the other hand, the output from the current transformer 2, which is a means for displaying the power absorbed by the pot, causes the meter drive circuit 7 to cause the display means 8, which is a meter, to indicate an indication in proportion to the input power.

With the above configuration, the user can know that the induction heating is being performed by the light emitting means 10, and can also know the absorbed power of the pot 5 by the instruction on the display means 8, and can know that the device is operating correctly and that the cooking process is being performed. You can check the power settings suitable for your device.

FIG. 2 shows an embodiment in which the light emitting means 10 and the display means 8 are integrated and used for illumination of the display means.

FIG. 3 shows still another embodiment of the present invention, in which several light-emitting means 10 are arranged, and during heating operation, one of the light-emitting means lights up, and the power absorbed by the pot 5, that is, according to the input. In this method, the number of lights on increases or decreases to display to the user that heating is in progress and its input status.

In this case, it is necessary to use a method in which the meter drive circuit 7 drives the light emitting means 10 using, for example, a Schmitt circuit with different levels.

As is clear from the above description, the present invention simultaneously provides an amount proportional to the absorbed power of the pot and an indication that the heating operation is in progress, so it is possible to always perform good cooking.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an induction heating cooker showing one embodiment of the present invention, and FIGS. 2 and 3 are front views showing other embodiments of the display section, respectively. 2... Karen)) lance, 3... Induction heating power supply device, 4... Heating coil, 8...
...Display means, 10... Light emitting means.

Claims (1)

[Scope of utility model registration request] A heating coil that inductively heats an object to be heated, an induction heating power supply device that supplies a heating current to the heating coil during normal operation and interrupts the heating operation when a protection circuit that detects an abnormality is activated, and the induction heating power supply device described above. a power supply to be connected, a current transformer for detecting an input current supplied from the power supply to the induction heating power supply device, and a display means for displaying a change in input power proportional to a change in heating amount by an output of the current transformer. A display device for an induction heating cooker, comprising: a light emitting means that lights up via a drive circuit when the heating coil is excited.