JPH0989459A - Electromagnetic heating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To heat and dry an object to be heated efficiently by electromagnetic induction by providing a spiral coil fixed in a manner of enclosing a heating vessel at its periphery and also a rotating means for rotating the heating vessel in the region enclosed by the coil. SOLUTION: This electromagnetic heading device is provided with a substantially conical heating vessel 1 having an opening at the top in a freely rotatable manner and a rotating means 2 for rotating the heating vessel 1 around its axis A. In the rotating means 2 the output shaft 22A of a motor 22 is connected through a bearing 21 and fixed to the heating vessel 1, which is designed to be rotated at high speed without coming into contact with a coil 3 provided in a spiral of many windings around the heating vessel 1 and in a motionless state. This constitution enables heating and drying an object efficiently by electromagnetic induction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic heating device that heats and dries an object to be heated by utilizing an eddy current, and more particularly to an electromagnetic heating device that can perform this electromagnetic heating with high efficiency. is there.

[0002]

2. Description of the Related Art A heating device utilizing electromagnetic induction has been developed and used mainly for cooking.

As such an electromagnetic heating device, for example, a range type device for heating a pot or the like and a rice cooker are known.

By the way, in such an electromagnetic heating device, an eddy current (eddy current) is usually generated on the surface of a container to be heated due to electromagnetic induction, and Joule heat generated in the container at this time causes the entire container to generate heat. The contents are heated.

[0005]

However, in such an electromagnetic heating device, the object to be heated contained in the container is heated by conducting the heat from the inner wall surface side of the container. If it is attempted to sufficiently heat and dry even the object to be heated on the center side, a large amount of electric power is required, resulting in poor energy efficiency and economical inconvenience.

Further, in such an electromagnetic heating device, the contact area of the object to be heated with the inner wall surface of the container is not so large, and it is difficult to stir unless the object to be heated is a liquid. It ’s difficult to improve,
It is not preferable especially when a heating operation for the purpose of drying is performed.

In view of the above-mentioned circumstances, the present invention utilizes the electromagnetic induction effect to efficiently heat an object to be heated.
An object is to provide an electromagnetic heating device that can be dried.

[0008]

That is, the invention according to claim 1 applies an eddy current to a predetermined heating container in which an object to be heated containing moisture such as raw dust contained in an inside heated part is accommodated. An electromagnetic heating device for heating and drying the object to be heated by using the heat generated by the heat generation, which comprises means for rotating the heating container.

Further, according to the invention of claim 2, a lid or a collar is provided on the upper part of the heating container so that the object to be heated housed inside does not stick out to the outside.

The invention according to claim 3 provides a spiral groove or a convex portion on the inner peripheral surface.

Further, in the invention according to claim 4, a hole for draining water is provided on the outer peripheral surface of the heating container.

Further, the invention according to claim 5 is one in which a means for blowing air from the outside of the heating container is provided.

According to the invention of claim 6, the heating container is formed in a substantially conical shape.

[0014]

According to the present invention, the heating container is rotated while a predetermined current is being supplied to the spiral coil surrounding the heating container, so that an eddy current is generated on the surface of the rotating heating container and the heating operation by electromagnetic induction is performed. While performing the above, it is possible to physically separate and dehydrate the water contained in the object to be heated housed in the heating container by utilizing the centrifugal force simultaneously generated by the rotation.

In particular, according to the present invention, by engraving a spiral groove or the like on the inner peripheral surface of the heating container, the surface area of the inner peripheral surface of the heating container which generates heat is increased and the contact area of the object to be heated is also increased. At the same time, since the centrifugal force also acts on this heated object, the centrifugal force is used to cause the heated object to crawl up the inner peripheral surface to the upper part along the groove etc. Since the same operation can be repeated, the stirring action is substantially performed, and the heating efficiency is greatly improved.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic perspective view showing an electromagnetic heating device of a first embodiment according to the present invention, which is used for treating garbage. In the electromagnetic heating device of this embodiment, a substantially conical heating container 1 having an open top is rotatably provided.
The rotating means 2 for rotating about the central axis A is provided, and the coil 3 for generating an eddy current is fixedly provided close to the outer peripheral surface of the heating container 1. In addition, in this embodiment, the air is blown from the side of the heating container 1 by an air blower (not shown).

The heating container 1 of this embodiment is formed by using an appropriate material having electrical conductivity (eg, copper), and can be freely rotated up and down by an appropriate bearing 21 with its tip side facing downward. The spiral groove (may be a protrusion) 1A (see FIG. 2) is engraved on the inner peripheral surface from the lower part to the upper part. In addition, since the heating container 1 separates and removes water from the raw garbage inside by a centrifugal action, a large number of holes 1B having a size that does not cause clogging of the raw garbage are formed.

Further, the heating container 1 has a lid 11 which is detachably attached to the upper part of the heating container 1 so that water can be removed and the weight becomes lighter so that raw garbage moving upward in the container does not fly out of the container. Although it is attached to, it is of course possible to use a brim or the like.

The rotating means 2 is an output shaft 22A of the motor 22.
Is fixed and connected to the heating container 1 via a bearing 21, and the heating container 1 does not come into contact with the coil 3 provided on the outer peripheral surface side.
Can be rotated at high speed. In addition, the support portion 23 to which the bearing 21 is attached (waterproofed)
On the upper surface side, a receiving portion and a drain groove (not shown) for collecting dirty water leaking from the heating container 1 and discharging it to a predetermined place are formed. Inside the supporting portion 24, the motor 2
2 are housed.

The coil 3 is provided in an immovable state by winding a large number of spirals around the heating container 1, and the heating container 1 rotates in a conical inner region formed by the coil 3. .

Therefore, according to this embodiment, the rotating means 2
In the heating container 1 rotated by the motor 22 of
Raw garbage for drying treatment is stored, and when an electric current is applied to the coil 3, an eddy current is generated on the surface of the heating container 1 which is rotating, so that Joule heat is generated in the heating container 1. The heating container 1 itself is heated by.

At the same time, the high-speed rotation of the heating container 1 physically separates and removes the water contained in the garbage by centrifugal force to the outside and discharges it from the hole 1B. Since the centrifugal force acts, the garbage in the lower part of the heating container 1 is a spiral groove 1A provided on the inner wall surface of the heating container 1.
Crawl up to the upper part along with and move to the upper part of the container one by one. In addition, the lid 11 is provided inside the heating container 1.
The raw garbage that has reached the point will fall to the center due to its own weight and the same operation will be repeated again, so that the heating and drying operation will be performed as if the stirring operation is performed inside the container. It is possible.

Moreover, according to this embodiment, in addition to the rotating operation and the heating operation by the electromagnetic induction, the air is blown into the heating container 1 from the hole 1B by the air blowing means to expel the moisture from the raw garbage. Therefore, the more effective drying action can be performed.

Next, an electromagnetic heating apparatus according to the second embodiment of the present invention will be described with reference to FIG. In the electromagnetic heating device of this embodiment, a spiral projection 1C is formed from the lower part to the upper part on the inner peripheral surface of the heating container 1, and
A spiral coil 3 is fixed near the outer peripheral surface of the heating container 1, and is similarly configured to blow air from one side.

The heating container 1 of this embodiment is rotatably mounted by the bearings 24 and 25 that support the upper and lower parts, and the heating container 1 is of a size that does not cause clogging of raw dust. Many holes (not shown) are formed. It should be noted that the heating container 1 has a lid 1 in which a large number of blades having a substantially arcuate cross section are combined in order to return the garbage that is pushed up to the upper part by the action of centrifugal force to the lower central part and return it.
2 is rotatably attached.

The rotating means 2 of this embodiment comprises a drive gear 26 which is rotationally driven by the motor 22 and a gear 27 which is fixed along the upper outer edge of the heating container 1 and meshes with the drive gear 26. Of course, other configurations may be used.

Therefore, according to this embodiment, the heating container 1
Due to the centrifugal force associated with the rotating operation of, the water contained in the garbage is centrifugally separated and removed to some extent. In other words, the amount of water to be removed by electromagnetic heating is reduced by that amount. It is possible to obtain a significant power saving effect without consuming energy.

[0028]

As described above, according to the present invention, the heating container can be rotated while a predetermined current is applied to the spiral coil surrounding the heating container. In other words, While generating an eddy current on the surface of the rotating heating container, the centrifugal force generated by the rotation can be used to separate and dehydrate the water contained in the object to be heated. The amount of water can be physically reduced, and the power supplied to the electromagnetic force can be significantly reduced.

Further, particularly in the present invention, by engraving a spiral groove or the like on the inner peripheral surface of the heating container, the surface area of the inner peripheral surface of the heating container which generates heat is increased and the contact area of the object to be heated is also increased. With the increase in the number of grooves, it is possible to realize the circulation cycle action of crawling the object to be heated up to the upper part along the inner peripheral surface and dropping it again to the lower part.
The material to be heated such as garbage can be substantially stirred, and the heating efficiency is dramatically improved.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an electromagnetic heating device according to the present invention.

FIG. 2 is a plan view of a heating container used in the apparatus.

FIG. 3 is a schematic cross-sectional view showing another electromagnetic heating device according to the present invention.

[Explanation of symbols]

 1 Heating Container 1A, 1C (spiral) Groove / Protrusion 2 Rotating Means 3 Coil

Claims (6)

[Claims] 1. An eddy current is generated in a predetermined heating container in which an object to be heated containing moisture such as raw garbage is housed in an inside heated part, and the heat generated thereby is used to heat the object to be heated. An electromagnetic heating device for heating and drying an object, comprising a coil fixed in a spiral shape so as to surround the outer peripheral surface of the heating container, and a rotating means for rotating the heating container in an area surrounding the coil. An electromagnetic heating device characterized in that 2. The electromagnetic heating device according to claim 1, wherein a lid or a collar is provided on the upper part of the heating container so that the object to be heated housed inside does not pop out to the outside. 3. The electromagnetic heating device according to claim 1, wherein the inner peripheral surface is provided with a spiral groove or a convex portion. 4. The electromagnetic heating device according to claim 1, wherein a hole for draining water is provided on the outer peripheral surface of the heating container. 5. The electromagnetic heating device according to claim 4, further comprising means for blowing air from the outside of the heating container. 6. The electromagnetic heating device according to claim 1, wherein the heating container is formed in a substantially conical shape.