JP5033586B2 - Electromagnetic cooker - Google Patents

Description

  The present invention relates to an electromagnetic cooker having a glass top plate.

  In an electromagnetic cooker, a high-frequency current is passed through an induction heating coil to generate magnetic lines of force, and the eddy current generated when the magnetic lines of force pass through a heated part (a cooking container such as a pan) changes to heat due to electrical resistance. It is for heating. At this time, since there is no visual change in the induction heating coil, it is visually determined that the heating unit is in a heated state, such as a flame of a gas cooker or an electric cooker, or red heat of a heater. I can't. For this reason, when the induction heating coil is energized, the display unit configured by the light emitting means is turned on to indicate that it is in a heated state (for example, see Patent Document 1 and Patent Document 2).

  By the way, in such an electromagnetic cooker, the top plate is generally made of high-strength glass so that it is difficult to get dirt and can be moved by sliding a pan or the like. However, since glass is transparent and the internal structure can be seen from above the top plate, the appearance is impaired, so a light-transmitting metal thin film is formed on one side of the glass and colored in black or metallic color. Is the mainstream (see, for example, Patent Document 3).

  However, if the top plate is colored in this way, it is difficult for the user to recognize that the top plate is made of glass, and there is a risk of accidentally hitting a pan or the like and scratching it.

JP2003-257601A JP2005-123054 JP 2004-247186 A

  The present invention has been made in view of the above-mentioned problems, and has a new transparency changing portion, which makes it difficult for the user to know that it is made of glass and to make it difficult to break it, or to clean it. It is an object of the present invention to provide an electromagnetic cooker including a top plate having advantages such as being easy.

An electromagnetic cooker serving as a base of the present invention includes a top plate on which an object to be heated is placed, an induction heating coil disposed below the top plate, and the induction disposed around the induction heating coil. An electromagnetic cooker comprising: a lamp display unit for displaying an operating state of the heating coil, wherein the top plate is made of high-strength glass, and is above the center portion of the induction heating coil of the top plate portion is opaque, a top portion corresponding to said induction heating coil is transparent, the upper portion corresponding (display upper surface) of the lamp display is Ru translucent der.

In the aforementioned patent document, in order to prevent the induction heating coil from being seen from above the top plate and deteriorating its appearance, the portion of the top plate that hits the top of the induction heating coil is intentionally processed to be opaque. Yes. In the present invention, conversely, the portion of the top plate above the induction heating coil is transparent, and the coil can be seen through the glass. However, since the user recognizes that the top plate is made of glass by observing the presence of the coil, attention is paid when placing a pot or a pan on the top plate. Further, the copper wire coil portion of the induction heating coil is not unsightly, but rather has a design appeal.
In the lamp display section, for example, the lamp is turned on when the power is turned on, and the lamp is turned on or flashes in the heating state of the induction heating coil after starting cooking (the way of lighting is different). Displays the operating state of the induction heating coil.

  Furthermore, since the top plate above the display portion is translucent, the light emission state of the lamp can be confirmed through the top plate. The reason why the lamp display portion is not fully transparent is that the diffusion of dot light due to the fact that the cleaning air can be flowed in order to lower the coil temperature. With such a configuration, since the lamp is not exposed on the surface, there are no grooves or steps on the surface of the top plate. In addition, the lamp emits light like a flame of gas, telling you that you are cooking and being cooked, and has the advantage of leading to the prevention of fire.

  In the present invention, if the outer portion of the display upper surface portion of the top plate is semi-transparent, which is almost opaque, it is possible to make the internal structure below it difficult to see.

In the present invention, the transparency of the top plate is preferably adjusted by changing the size, density, or both of opaque dots formed on the top plate by film formation or etching.
In this case, the manufacturing process is simpler and the cost can be reduced than changing the transparency by changing the thickness of the film forming part or the material of the film.

  As is clear from the above description, in the top plate of the electromagnetic cooking device of the present invention, the portion above the induction heating coil is transparent, and the portion above the display portion is translucent. For this reason, the user recognizes that the top plate is made of glass by observing the presence of the coil, and pays attention when placing a pot or a pan on the top plate. Moreover, it can confirm that it is driving | running through a top plate by the light emission state of a display part.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a plan view showing the overall configuration of the electromagnetic cooking device according to the embodiment of the present invention.
FIG. 2 is a plan view of the main body of the electromagnetic cooker of FIG.
FIG. 3 is a plan view of the top plate of the electromagnetic cooker of FIG.
4 is a side cross-sectional view of the electromagnetic cooking device of FIG. 1, FIG. 4 (A) shows an AA cross section, and FIG. 4 (B) shows a BB cross section.
As shown in FIG. 1, the electromagnetic cooker 1 includes a main body 2 and a top plate 20 that is disposed on the upper surface of the main body 2 and on which an object to be heated such as a pan or a frying pan is placed.

  The main body 2 has a flat rectangular parallelepiped shape, and as shown in FIG. 2, a rectangular recess 2a is formed near the center. A central shaft 3 projects from the center of the recess 2a. A pedestal 4 on which the induction heating coil 5 is installed is installed around the central axis 3. The induction heating coil 5 is wound in a spiral shape around the central axis 3 on the pedestal 4, and the coil 5 is disposed in an annular shape as a whole. Both ends of the coil 5 are led into the main body 2 and connected to a high frequency power source. A step 2b for placing a later-described top plate 20 is provided around the recess 2a.

  Four arc-shaped lamp display portions 7 </ b> A to 7 </ b> B are disposed outside the outermost periphery of the coil 5. The display unit 7 is disposed on the vertical center line and the horizontal center line of the main body 2 in a plan view at the same center angle (90 °). The display unit 7 includes a plurality of LEDs 8 arranged on an arcuate substrate 9. More specifically, in the upper display portion 7A, seven LEDs 8 are arranged in an arc shape on an arc-shaped substrate 9 having a central angle of 40 °. In the lower and left and right display portions 7B, 7C, and 7D, eleven LEDs 8 are arranged in an arc shape on an arc-shaped substrate 9 having a central angle of 65 °. These LEDs 8 are controlled by a control unit (not shown) and turned on and off as the induction heating coil 5 is conducted.

  On the front surface of the main body 2, an operation unit such as a knob for adjusting power supplied to the power switch and the coil, a display unit, and the like are provided (not shown). A ventilation port 8 is provided at the rear of the main body 2. Air for cooling the coil 5 and the power supply unit is taken in through the ventilation port 8.

Next, the top plate 20 will be described with reference to FIGS.
The top plate 20 is made of a rectangular high-strength glass 21, and is placed on the step 2b of the main body 2 and fixed. On the back surface of the glass 21, an opaque metallic material 22 is formed in a pattern described below. That is, in this example, the transparency is changed by changing the area ratio of the film forming portion.
Circular portion 22a corresponding to the upper part (including the upper part of the central axis 3) of the winding of the induction heating coil 5: opaque (film area ratio: 100%),
An annular portion 22b above the annular portion of the winding of the induction heating coil 5: transparent (membrane area ratio: 0%),
Arc-shaped portion 22c above each display portion 7: Translucent nearly transparent (film area ratio: 30%).

An opaque double ring 22d is drawn around the central circular portion 22a. Further, between the annular portion 22b and the arc-shaped portion 22c, an opaque annular portion 22e and a slight gap are formed from the inside to the outside to form an opaque arc-shaped portion 22f. Furthermore, the peripheral part 22g of the glass 21 is an opaque part. These are not only for decorative purposes but also for making the annular transparent portion 22b and the four arc-shaped semi-transparent portions 22c stand out.
Further, the outer portion 22h other than these is a semi-transparent portion (film area ratio: 50%) that is almost opaque.

  The area ratio of the film forming unit 22 can be changed by changing the density and / or size of the opaque dots. Such dots can be formed by etching the back surface of the glass 21 in addition to forming a metal material on the back surface of the glass 21.

  By using such a top plate 20, as shown in FIG. 4, the upper portion 22 b of the coil 5 is transparent (the glass 21 remains), so that the coil 5 can be seen through the top plate 20. it can. The user visually recognizes the presence of the coil 5 to recognize that the top plate 20 is made of glass.

  Further, since the upper portion 22 c of the display unit 7 is translucent, which is almost transparent, the light emission state of the LED 9 can be seen through the top plate 20. As a result, the light emitted from the LED 9 looks like a gas flame, and the user is made aware that he is cooking. Further, by making it translucent, it is possible to suppress the diffusion of the light of the dots when a cleaning air is supplied to lower the coil temperature. With such a configuration, since the light emission state of the lamp can be visually observed even when the lamp is not exposed on the surface, there are no grooves or steps on the surface of the top plate as when the lamp is provided on the surface of the top plate, and it is difficult to get dirty. There is an advantage that it is easy to wipe with. Further, the portion 22b above the coil 5 and the portion 22h near the outside of the upper portion 22c of the display unit 7 are semi-transparent and nearly opaque, so that the internal structure below them is difficult to see.

It is a top view which shows the whole structure of the electromagnetic cooker which concerns on embodiment of this invention. It is a top view of the main-body part of the electromagnetic cooker of FIG. It is a top view of the top plate of the electromagnetic cooker of FIG. It is side surface sectional drawing of the electromagnetic cooker of FIG. 1, FIG. 4 (A) shows an AA cross section and FIG. 4 (B) shows a BB cross section.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electromagnetic cooker 2 Main body 3 Center axis 4 Base 5 Induction heating coil 7 Lamp display part 8 LED 9 Substrate 20 Top plate 21 High-strength glass 22 Film-forming part

Claims (2)

A top plate on which an object to be heated is placed;
An induction heating coil disposed below the top plate;
A lamp display unit arranged around the induction heating coil for displaying an operation state of the induction heating coil;
An electromagnetic cooker comprising:
The top plate is made of high strength glass,
A portion of the top plate that is above the center portion of the induction heating coil is opaque, a portion that is above the induction heating coil is transparent, and a portion that is above the lamp display portion (display upper surface portion) is translucent. And
Conductive magnetic cooker you wherein the outer part of the display upper surface of the top plate is opaque close translucent. Transparency of the top plate, are formed on the top plate by a deposition or etching, the size of opaque dots, density, or No mounting according to claim 1 Symbol, characterized in that it is adjusted by changing both Electromagnetic cooker.

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