JPH076872A - Heating object housing structure for induction heating device - Google Patents

Abstract

PURPOSE:To raise a temperature up to a desired heating condition without causing overheating or heating shortage in plural heating objects. CONSTITUTION:A heating object housing structure for an induction heating device 1 is arranged to heat plural heating objects 7 and 8 housed in a heating chamber 4 by a microwave generated from microwave generating sources 9 and 10 by heating them internally. As for these plural heating objects 7 and 8, heating objects 7a and 8a whose calorific value is made large are arranged on the side where electric field strength becomes large, and heating objects 7b and 8b whose calorific value is made small are arranged on the side where electric field strength becomes small.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dielectric heating apparatus which can be suitably used for dielectrically heating an object to be heated made of a dielectric material such as synthetic resin medical equipment for sterilization. The present invention relates to a heated object storage structure.

[0002]

2. Description of the Related Art FIG. 10 is a plan view showing a typical prior art storage structure for an object to be heated. The so-called disposable filter body 81 for dialysis and the tube 82 for drip, which are the objects to be heated, must be heated and sterilized after use and then discarded, and thus, conventionally, such a medical device 8 is used.
1, 82 are accommodated in a container 83 in a non-uniform manner, and the container 83 is dielectrically heated by microwaves in a heating chamber of a dielectric heating device, whereby internal heat is generated and heat treatment is performed at a high temperature. .

[0003]

In such a prior art, the filter main body 81 arranged outside in the container 83.
Since the tube 82 made of a material having a large dielectric loss angle such as soft polyvinyl chloride is exposed to electromagnetic waves having a high electric field strength in the heating chamber, the tube 82 is unnecessarily heated to be deformed by heat. There is a case where it is generated or a toxic gas such as chlorine gas is generated. Further, in the container 83, electromagnetic waves are blocked by the inner filter casing 81 and the tube 82 by the outer filter casing 81 and the tube 82, and the inner heated objects 81 and 82, especially the filter body having a large dielectric loss angle. There is a problem that the water in 81 cannot be rapidly heated to sterilize and dry.

Therefore, an object of the present invention is to accommodate a plurality of objects to be heated having different dielectric loss angles in the same heating chamber,
By providing an object-to-be-heat-stored structure of a dielectric heating device capable of efficiently heating an object to be heated whose heating value should be large and suppressing heating of an object to be heated whose value should be small. is there.

[0005]

DISCLOSURE OF THE INVENTION The present invention relates to an object to be heated in a dielectric heating device for internally heating a plurality of objects to be heated contained in a heating chamber by microwaves generated from a microwave source. In the storage structure, among the plurality of objects to be heated, the objects to be heated whose heat generation amount is large are arranged on the side where the electric field strength is high, and the objects to be heated whose heat generation amount is low are the electric field strength. The object to be heated storage structure of the dielectric heating device is characterized in that it is arranged on the side where the value becomes smaller.

[0006]

According to the present invention, among the plurality of objects to be heated, the objects to be heated whose heat generation amount is large are arranged, for example, on the outside where the electric field strength is large, and the objects to be heated whose heat generation amount is small are to be heated. The object is arranged, for example, on the inner side where the electric field strength is small. The object to be heated thus arranged is dielectrically heated by microwaves while being housed in the heating chamber. At this time, the object to be heated arranged on the outside and having a large calorific value can internally sterilize due to electromagnetic waves having a high electric field strength to raise the temperature, evaporate attached water and the like and sterilize it. Further, the object to be heated, which is to be arranged on the inner side and has a small amount of heat generation, does not become undesirably high in temperature because electromagnetic waves are shielded by the object to be heated on the outer side, and it is satisfactorily generated without causing thermal deformation or toxic gas It can be heated to evaporate water and sterilize.

In this way, a plurality of objects to be heated can be housed in the same heating chamber and heated at the same time under different heating conditions only by changing the arrangement of the objects to be heated contained in the heating chamber. The amount of heat generated can be changed according to the type of object to achieve the desired heating state.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a system diagram showing an apparatus 1 for treating medical waste with microwaves and hot air in which a structure for storing a heated object according to an embodiment of the present invention is implemented. A heating chamber 4 is provided in the heating furnace 3 of the dielectric heating device 1, and two containers 5 and 6 are housed in the heating chamber 4 so that they can be inserted and removed.
A plurality of objects to be heated 7, 8 are housed therein. Each of the objects to be heated 7, 8 is, for example, a medical device such as a dialysis filter, and has a filter casing 7 made of polystyrene or polycarbonate having a substantially right columnar shape.
a and 8a, and flexible polyvinyl chloride tubes 7b and 8b connected to the filter casings 7a and 8a.

When the objects 7 and 8 to be heated as described above are housed in the heating chamber 4, in order to prevent deformation due to heat, the filter casings 7a and 8a are provided with a microwave source 9 having a high electric field strength. , 10 and the tubes 7b, 8b are arranged on the side away from the microwave generation sources 9, 10 where the electric field strength is small, that is, inside the heating chamber 4 adjacent to each other. ing.

The objects 7 and 8 to be heated are dielectrically heated by the microwaves generated from the microwave generators 9 and 10, and the heating means 11 supplies, for example, 18
The objects to be heated 7 and 8 are heated and sterilized by being heated by a gas having a high temperature of about 0 ° C.

FIG. 2 is a perspective view showing the whole of the dielectric heating device 1 shown in FIG. A door 13 is provided in the heating furnace 3 of the dielectric heating device 1 so as to be openable and closable by a hinge 14. The door 13 can be opened and the containers 5 and 6 can be put in and taken out.

Referring again to FIG. 1, the inflow hole 1 of the heating furnace 3
Air guide tubes 21 and 23 are provided at 6 and 17, respectively. Further, the heating furnace 3 is provided with stirring blades 70, 71 that are driven to rotate by motors 73, 74 during dielectric heating with microwaves from the microwave generation sources 9, 10, and the objects to be heated in the containers 5, 6 are heated. Microwaves can be supplied to 7 and 8 uniformly. Perforated plates such as punching metal are provided in the discharge holes 19 and 20 of the floor 18.

Containers 5, 6 in which the objects 7, 8 to be heated are stored
Is a partition plate 44 made of, for example, corrugated cardboard, as shown in FIG.
a and the tube 7b are separated and accommodated. Although FIG. 3 shows only one container 5 and the object to be heated 7 contained therein, the other container 6 is shown.
Similarly, the object to be heated 8 is housed in the bag 43 in a state of being partitioned by the partition plate 44.

The dielectric heating device 1 having the above structure
In, the objects to be heated 7 and 8 to be heated are arranged in the state shown in FIG. 3 described above, that is, the tubes 7b and 8b that generate a toxic gas or the like are easily adjacent to each other and are deformed by heat, A filter casing 7a containing water,
8a is arranged so as to face the side where the electric field strength is high, that is, the microwave generation sources 9 and 10, respectively, thereby preventing the tubes 7b and 8b from unnecessarily becoming hot and thermally deformed. it can. That is, since the microwaves are attenuated in the tubes 7b and 8b by the filter casings 7a and 8a arranged outside, the tubes 7b and 8b are arranged in the region where the electric field strength is small, and the microwaves having high strength are used. Dielectric heating is suppressed.

Generally, when a dielectric such as the object to be heated 7, 8 of this embodiment is irradiated with an electromagnetic wave, the energy thereof is converted into heat inside the dielectric, utilizing the principle of dielectric heating. The objects to be heated 7, 8 themselves can be internally heated to heat-dry and sterilize. The microwave frequency is
For example, 2450 MHz is often used, and others 915
In some cases, a high frequency of MHz or 3 to 50 MHz is used. Calorific value Q [W / cm ³ ] of each heated object 7 and 8
Is represented by the following equation. That is,

[0016]

[Equation 1]

Where ν is the frequency [Hz], and E
Is the strength of the electric field [V · m ⁻¹ ], εr is the relative permittivity of the material, tan δ is the dielectric loss angle of the material, and ε
r · tan δ is a loss coefficient peculiar to a substance.

FIG. 4 shows the relative permittivity εr, the dielectric loss angle tan δ and the penetration depth of various substances. As is clear from such a figure, the loss coefficient εr · tanδ peculiar to the substance
The larger the value, the larger the absorbed power and the more likely it is to be heated.
As described above, the containers 5 and 6 are adapted to these various substances.
Place the ones that you want to generate a large amount of heat in the microwave generators 9 and 10 side where the electric field strength is large, and place the ones that you do not want to generate too much heat in the side that is far from the microwave sources 9 and 10, and It can be in a heated state.

As another embodiment of the present invention, as shown in FIG. 5, when only one container 5 is housed in the heating chamber 4 for heat sterilization, as shown in FIG. As described above, the tube 7b may be arranged in the center of the container 5, and the filter casing 7a may be arranged around the tube 7b. This also prevents the tube 7b from unnecessarily increasing in temperature and prevents deformation and generation of toxic gas.

In the above-mentioned embodiments, the dialysis filter is explained as the object to be heated, but the object to be heated is not limited to this, and other dielectric materials such as other medical waste or industrial waste or It may be a machine part made of plastic and is not limited in any way.

As another embodiment of the present invention, in order to adjust the distribution of the electric field strength according to the stored state of the object to be heated,
A reflecting plate that reflects microwaves or a shielding plate that partially shields microwaves may be provided in the heating chamber 4.

[0022]

As described above, according to the present invention, in the dielectric heating device, the object to be heated, which contains a large amount of heat, such as water, is directed toward the side where the electric field strength is large, and the amount of heat generated is small. Since the object to be heated is arranged on the side where the electric field strength is small, the object to be heated is unnecessarily heated to a high temperature,
It is possible to eliminate the problem of being heated only to an undesirably low temperature, and thus it is possible to simultaneously bring a plurality of objects to be heated into a desired heating state in the same heating chamber without changing the configuration of the heating device. Become.

[Brief description of drawings]

FIG. 1 is a system diagram of an induction heating device 1 in which a storage structure for an object to be heated according to an embodiment of the present invention is implemented.

FIG. 2 is a perspective view showing a dielectric heating device 1.

FIG. 3 is a plan view of the container 5 showing a storage state of the article to be heated 7.

FIG. 4 is a relative permittivity εr and a dielectric loss angle tan of various substances.
It is a figure which shows (delta) and a penetration depth.

FIG. 5 is a plan view of the container 5 showing a housed state of an object to be heated according to another embodiment of the present invention.

FIG. 6 is a plan view showing a conventional storage state of an object to be heated.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dielectric heating device 3 Heating furnace 4 Heating chamber 5,6 Container 7,8 Object to be heated 9,10 Microwave source 11 Heating means 13 Door 43 Bag 44 Partition plate

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsumi Kodera 3-2 Takazukadai, Nishi-ku, Kobe City, Hyogo Prefecture 16 Kawaju Disaster Prevention Industry Co., Ltd.

Claims (1)

[Claims] 1. A to-be-heated object storage structure of a dielectric heating device, which internally heats a plurality of to-be-heated objects housed in a heating chamber by microwaves generated from a microwave generation source, wherein: As for the heating object, the object to be heated which has a large calorific value is arranged on the side where the electric field strength is large, and the object to be heated whose calorific value is small is arranged on the side where the electric field strength is small. An object heating structure for an induction heating device, which is characterized in that: