JPH07147187A - High frequency electromagnetic cooking table - Google Patents

Abstract

PURPOSE:To provide a high frequency electromagnetic cooking table which can be utilized as an effective space over the whole process of cooking and kept clean, and is also easy to clean by forming the whole surface into a flat plate. CONSTITUTION:A high frequency electromagnetic cooking table is essentially characterized by comprising a support mechanism for horizontally supporting heat resisting, water resisting and flat top plates 10, 10 having insulating property and difficult to deform, which are represented by marble plate, a magnetic field generating device 11 formed of a coil mounted on the corresponding part of the reverse side of the top plate 10 so as to generate a high frequency electromagnetic filed in a specified part of the surface of the top plate 10, and a high frequency power source generating device 15 connected to supply a power source to the device 11. An object 12 to be heated such as pan or kettle which is put on the generating part of high frequency magnetic field and used is formed of a conductive or magnetic material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a kitchen utensil, and more particularly to a cooktop for heating and cooking.

[0002]

2. Description of the Related Art Induction cookers, that is, cookers that heat by using induction heating, have been put on the market in the United States and Japan since around 1974. Only the pan heats up, the cooker does not heat up, there is less risk of fire and burns than a gas stove or electric stove, the surrounding air is not heated, so the thermal efficiency is high, and no oxygen is consumed, so no ventilation is required. thing,
It is a clean cooker with the features that no toxic gas is generated, it does not burn on the surface even if it spills, and it is easy to clean.

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
When a metal pot is placed in a magnetic field in which the direction of magnetic force lines alternates (hereinafter referred to as "alternating magnetic field"), the metal itself generates heat, which is used.
In Japan, those that directly use a 50 Hz or 60 Hz commercial frequency (hereinafter referred to as “low frequency”) power source have become widespread. The structure is generally one in which an alternating magnetic field is generated by connecting an AC power supply to the coil surrounding the iron core, these are covered with a range cover made of an insulator, and a metal pot is placed on it. Target. Therefore, the structure where the pot is placed is slightly higher than the surrounding area. This structural feature is advantageous in that it is obvious where the pot is placed. However, in order to sacrifice the overall flatness of the cooking table, the value as a cooking space when performing operations other than heating is reduced. It is an object of the present invention to improve a conventional electromagnetic cooker to eliminate the above-mentioned problems.

[0004]

In order to achieve the above object, a high-frequency electromagnetic cooking table of the present invention is a plate-shaped top plate which has heat resistance, water resistance, and insulation properties and is not easily deformed. A support mechanism that supports the floor horizontally from the floor to a certain height, a magnetic field generator and a magnetic field generator consisting of a coil attached to a corresponding portion of the back surface of the top plate for generating a high-frequency electromagnetic field on a certain portion of the top surface. And a high frequency power generator connected to supply power to the device. The object to be heated, such as a pot or kettle, which is placed in a portion where a high-frequency electromagnetic field is generated during heating and cooking is made of a conductive material or a magnetic material. In addition, marble can be used as a top plate that has heat resistance and insulating properties and is difficult to deform.

[0005]

The function of the high frequency electromagnetic cooktop configured as described above is as follows:
When cooking other than heat cooking, it is used as an ordinary cooking table for preparation of cooking ingredients, cutting, or serving after finishing cooking. When heating and cooking, a conductive or magnetic material to be heated is placed on a predetermined portion and the power is turned on to use as a heating table.

[0006]

Embodiments will be described with reference to the drawings. Figure 1
The partial expanded sectional view of one Example of the high frequency electromagnetic cooking table concerning this invention is shown. The top plate 10 is made of a material, such as marble, which has an insulating property against electricity and is resistant to deformation by water and heat. The insulating property is required because the magnetic flux generated by the coil can pass through. Water resistance is necessary when contents such as pots spill. The heat resistance is necessary because the top plate itself does not generate heat, but the object to be heated, such as a pot, placed on the top plate also generates heat. Hard to be deformed means that it is hard to be deformed by force or heat, and it is necessary to be able to bear the weight of a pot or the like. As a material suitable for the above conditions, for example, a marble plate is considered, and it can be said that it is preferable from an aesthetic point of view or a hygienic point of view.

The coil 11 constitutes a magnetic field generator, and a pan or the like is located on the corresponding back surface of the portion of the top plate 10 on which the object to be heated is placed. The arrow in the figure indicates the path of the alternating magnetic field generated by the coil. That is,
The magnetic flux penetrates the top plate 10 and reaches the object to be heated 12. When the object to be heated 12 has conductivity, a starting force is induced in the conductor by electromagnetic induction and an eddy current flows. The object to be heated is heated by the Joule heat due to this eddy current. When the object to be heated 12 is a magnetic material, heat is generated due to power loss based on magnetic hysteresis. High frequency power generator 15
Is connected to the coil 11 by an electric wire 17 as a connection mechanism. Here, the high frequency means a frequency of several hundred Hertz to several Megahertz. As the high frequency power generator 15, for example, a semiconductor device such as a thyristor inverter can be used. Due to recent advances in power electronics, some are small, easy to handle, and have a long life.

The high frequency power source generator 15 is turned on and off by a switch 16, and the coil 11 which is a magnetic field sending device is turned on and off.
Is turned on and off by the switch 14. The reason why the high frequency power source is used is that the top plate 10 needs to have a thickness of about 3 cm due to the requirement of strength, and therefore the low frequency power source does not induce a starting force enough to generate necessary heat. . The required frequency is specifically selected depending on the shape arrangement of the coil 11, the material thickness of the top plate 10, and the like. Further, the heat generation state of the object to be heated 12 is the conductivity,
It greatly depends on the skin effect, which is controlled by the magnetic susceptibility and frequency.

FIG. 2 is a perspective view showing the appearance of an embodiment of the high-frequency electromagnetic cooking table according to the present invention. Support mechanism 13
Is for supporting the top plate 10 so as to keep it horizontal from the floor at a constant height. It typically consists of four legs and the necessary reinforcements. The switch 14 is used to adjust the heat generation state of the object to be heated 12 by turning on / off the power supply or adjusting the frequency. The object 12 to be heated such as a pot or a kettle is made of a conductive material or a magnetic material, and is used by placing it on a portion of the top plate 10 where a high-frequency electromagnetic field is generated, as needed during cooking. To be Therefore, in the case where no object to be heated 12 is placed, the top plate 10 having one flat surface
There is only.

[0010]

Since the high-frequency electromagnetic cooking table according to the present invention is constructed as described above, it can be used as an ordinary cooking table before and after heating for preparing cooking ingredients, cutting, or serving after cooking. it can. That is, there is an advantage that it can be utilized as an effective space in the whole cooking process. When a cutting board is placed on an uneven heating cooker for use, it is dangerous because it is unstable, but one side of the cooker according to the present invention is flat. In addition, since one surface is flat, there is no room for dust and dirt to enter, so it is clean and hygienic. Furthermore, when marble is used, the cleanliness is further increased due to its aesthetic appearance, and the hygiene is also improved. Even if there is dirt such as spillage, cleaning can be done very easily compared to the one with unevenness. When a material having low thermal conductivity such as marble is used as the top plate of the present invention, the high heat of the object to be heated causes another object placed on the cooking table, for example, tableware such as a plate made of pottery. You can cook safely without being transferred to the container for seasonings. Since a high-frequency power source is used, the amount of heat generated can be easily adjusted by adjusting the frequency as well as turning the switch on and off. As described above, the implementation of the present invention greatly advances the kitchen equipment, and its usefulness is great.

[0011]

[Brief description of drawings]

FIG. 1 is a partially enlarged sectional view of an embodiment of a high-frequency electromagnetic cooking table according to the present invention.

FIG. 2 is a perspective view showing an appearance of an embodiment of a high-frequency electromagnetic cooking table according to the present invention.

[Explanation of symbols]

 10 Plate Top Plate 11 Coil 12 Heated Object 13 Support Mechanism 14 Magnetic Field Generator Switch 15 High Frequency Power Generator 16 High Frequency Power Generator Switch 17 Wire

Claims (4)

[Claims] 1. A plate-like top plate having heat resistance, water resistance, and insulation properties and resistant to deformation, a support mechanism for supporting the top plate horizontally from the floor at a constant height, and a top plate surface. High frequency electromagnetic cooking consisting of a magnetic field generator consisting of a coil attached to a corresponding portion on the back surface of the top plate to generate a high frequency electromagnetic field in a certain part, and a high frequency power generator connected to supply power to the magnetic field generator. Stand. 2. The high-frequency electromagnetic cooker according to claim 1, wherein the object to be heated such as a pot or a kettle placed at a portion where a high-frequency electromagnetic field is generated during cooking is made of a conductive material. 3. The high-frequency electromagnetic cooking table according to claim 1, wherein the object to be heated such as a pot or a kettle placed at a portion where a high-frequency electromagnetic field is generated during cooking is made of a magnetic material. 4. The top plate made of marble, which has heat resistance, water resistance, and insulation properties and is resistant to deformation, is made of marble.
The high frequency electromagnetic cooktop according to 2 or 3.