JPS58128691A - Induction heater - 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] [Technical Field of the Invention] The present invention relates to an induction heating device having a plurality of heating regions and supplying high-frequency current by selecting heating coils provided respectively corresponding to these heating regions. .

[Technical background of the invention]

As shown in Figure 1, the so-called multi-hole magnetic induction heating device used in general K11L processing has heating areas A, B, Circles indicating O and D are drawn, and the back surface of this plate has heating coils J& and Jb corresponding to heating areas A, B, O and DK, respectively.

7a and J(l), and a control unit 10 is provided at one end of the plate/to select a heating coil and to supply a high frequency current to one selected heating coil.

Here, the control unit io has a main control unit and a sub-control unit (not shown) in its casing, and a heating area, B, and O on the surface of the casing.
and l operation units corresponding to DK//&, //1)
, //6 and //(l and III on heating area A
When heating an Il body (hereinafter referred to as 1 load), first select the heating area M (corresponding heating coil and set the output) by operating the //& output adjustment keys on the operation panel. Next, a load is placed on the heating area, and then the cooking start key is pressed to start cooking.

111vc, and when heating the load on heating areas B, O and D, operation parts 71b, //13 and /
/a is used to select the heating coil and set the output direction.

[Problems with background technology]

When the adjustment key is operated, the display lamp provided on this operation section //a lights up, which confirms that the heating coil corresponding to the heating area has been selected. When a load is placed after a certain amount of time has elapsed, there is the inconvenience of having to confirm its position using the display lamp on the operating section.

[Purpose of the invention]

The present invention has been made to eliminate the above-mentioned drawbacks.
It is an object of the present invention to provide an induction heating device in which a heating area corresponding to a heating coil selected by an operation part and a heating area corresponding to a heating coil not selected by an operation part can be distinguished from the surface of a plate body.

[Summary of the invention]

In order to achieve the above object, the induction heating device of the present invention provides a lamp near each heating coil provided corresponding to a plurality of heating regions, and a control section (therefore, when a heating coil is selected, A detection device is provided to turn on the lamp and detect that a load is placed on the heating area based on the value of the current flowing through the heating coil, and the detection device is configured to turn off the lamp that is being lit. .

[Embodiments of the invention]

Hereinafter, the present invention will be described based on one embodiment with reference to the accompanying drawings.

First, the heating coil used in the multi-hole magnetic induction heating device is shaped like a donut, as can be inferred from the heating area indicated by a circle, and the heating coil corresponding to this area is selected. An effective way to check whether the circle is bright or not is to brightly illuminate the outer shoulder of the circle, as shown in Figure 2, or to brightly illuminate the center of the circle, as shown in Figure 2. Conceivable.

On the other hand, since the plate 1 of the multi-layer magnetic induction heating device is made of a hard glass casing processed into a semi-diabetic shape, a lamp is provided at the center of the heating coil or at the periphery of the heating coil, and the control unit 10 controls the coil You can see that it is necessary to turn on the lamp at the same time as selecting Figure 11 is a perspective view of a miniature bulb installed in the center of the heating coil J. Also, Figure 1 shows a miniature bulb ≠ or a fluorescent/pu! generated light that is different from each other. This is an example in which a cross-shaped partition plate t is provided so as not to irradiate the heating area of This can be done by easily identifying the load from the snow-driving side.

By the way, since the above-mentioned miniature bulb and fluorescent lamp j are provided at the center or outer shoulder of the heating coil J, it is expected that they will be strongly affected by the magnetic field. Therefore, during cooking when a strong magnetic field is generated, the above-mentioned lamp should be turned off to prevent the filament from exceeding its rated value.
I need to do WII.

Taking this into consideration, in this embodiment, a detection device for detecting the load is provided in addition to the lamp, and the bulb or fluorescent lamp is turned off when the load is placed on the heating area. .

The figure below is a block diagram showing the overall configuration of an induction heating device equipped with this detection AT.The input circuit to which the commercial power supply is connected is equipped with a filter 15 to prevent high-frequency current or noise from leaking into the commercial power line. is provided, and this filter 15
The commercial power supply voltage is connected to the main control unit and sub control unit/
,? IL, /Jb, /30 and /jllK are applied.

This main control unit 12 controls circuit selection, output adjustment, and lamp blinking based on signals from operation units //lL to //a that include a switch for selecting a heating coil and a key for adjusting output. It is something. In addition, sub-control units 731 to /J
(L is mainly an AC-AC converter that rectifies AC voltage to obtain high ji?l wave voltage, and each has a heating coil 31
~jaK high school 1st year! It supplies ll wave power.

Further, in the vicinity of each of the heating coils j&~3d, a detection device/see 1~/$4 for detecting a high frequency current and detecting whether or not a load is placed is provided.

The operation of the induction heating device configured as described above will be explained below according to the user's operating procedure.

First, without placing a load on any of the heating areas K to D, for example, press and operate the protrusion adjustment center - of the operating section Ilb.
When the heating coil is selected and the output is set, the main controller/co judges this and selects the sub-controller/Jt) to enable the supply of high frequency power to the heating coil l/b. Light up the miniature ball ≠ b. As a result, as shown in Figure 3,
The center of heating area B is brightly illuminated. In this case, if a fluorescent lamp l of the shape shown in Fig. μ is used instead of the miniature bulb, as shown in Fig. 2, f7 outside the heating area jdB can be used.
The R section is brightly illuminated.

Next K, heating area B (When a load is placed and the cooking start key is pressed, high-dark wave power at a level set by the sub-control unit/Jb is supplied to the heating coil JbK.

Here, the detection device 11 detects the current flowing through the heating coil 3b, and if it is determined that there is a load, it sends a load detection signal to the main control section 2, and the main control section 1 detects this. Receiving the signal, turn off the light bulb ≠ b. Thus, cooking is performed on the heating area M, but if the load is removed during heavy cooking, the detection device Vtb determines this and turns off the main control unit. A signal indicating that there is no load is given to l:t, and based on this signal, main controller/2 lights up miniature bulb #1.

Based on this, when the user applies another load to the heating area B, the light bulb pb goes out again.

In addition, if you change the load while holding down the cooking start key, a strong magnetic field will act on the filament heated to high temperature for a short time. It is sufficient to sum the current value to a low value.

In the above embodiment, a multi-hole magnetic induction heating device having v heating regions has been described, but it goes without saying that the present invention can also be applied to multi-hole magnetic induction heating devices other than these.

In addition, in the above embodiment, a partition plate was provided so that the light generated by the small bulb or the fluorescent lamp would not irradiate other heating areas, but if the partition plate is installed in the center of the small heating coil, In this case, it is relatively easy to identify the heating area, so a partition plate to prevent light from leaking is not necessarily necessary.Furthermore, in the above embodiment, the induction heating device uses a translucent plate. As described above, even when a transparent plate is used, it goes without saying that the heating coil can easily detect the selected heating area from the surface of the plate in the same way as described above.

〔Effect of the invention〕

More than! 9, according to the induction heating device f of the present invention, the heating area corresponding to the heating coil selected by the operation unit and the heating area not selected by the operation W6 can be easily identified from the surface of the plate body. Things happen.

In addition, by installing a detection device to detect the load,
The wrap provided near the heating coil can be reliably protected.

[Brief explanation of drawings]

FIG. 1 is a plan view and a side view showing the configuration of a conventional induction heating device, FIGS. 2 and 3 are plan views showing a schematic configuration of an embodiment of the induction heating device according to the present invention, and FIG. Figure (1
(and fb+ is a perspective view of elements constituting the same embodiment, 1
Figure 1g1 is a diagonal diagram showing the Fk'' and It states of the elements constituting the embodiment, and Figure 6 is a block diagram showing the overall configuration of the embodiment. ... Heating coil, μ. ≠ a-μd ... Mini bulb, j ... Fluorescent lamp, 6 ... Partition plate, 10 ... Control part 1, //l ~ // (1. ...Operation unit, 12...Main control unit, /j IL -/3 (!-
・・Sub-control unit, /IIa ~/Q li =-detection support. Applicant's agent Kiyoshi Inomata 1 Figure 3 Kuchi (0) Mo 2 Figure 5 En 1 Figure (b)

Claims (1)

[Claims] (1) A transparent or translucent plate having a plurality of heating areas on its surface and on which a load to be heated can be placed, and each of the heating areas (corresponding to the plate); a heating coil provided on the back surface of the heating coil; and a control section that selects the heating coil and supplies a high-frequency current to one selected heating coil, wherein the heating coil is controlled by the control section. A lamp is provided on the back surface of the plate corresponding to the heating area to indicate that the heating coil has been selected, and is configured to brightly illuminate the heating area corresponding to the heating coil selected by the control unit. An induction heating device characterized in that: (J) a lamp is provided on a back surface portion corresponding to each of the heating areas to indicate that the heating coil has been selected by the control section; The patent discussion is characterized in that the heating area corresponding to the heating coil is brightly illuminated, and the lighting of the lamp is turned off when a cargo is placed on the heating area. The induction heating device according to item 1 of the scope.