JP2003217795A - Heating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heating device capable of efficiently using the light emitted from an incandescent lamp by emitting the light only to an object to be treated, and ensuring a satisfactory working environment for a worker without giving a glaring feeling thereto. <P>SOLUTION: This heating device comprises the tube type incandescent lamp 1 and a reflector 2 which surrounds the incandescent lamp to reflect the light emitted from the incandescent lamp 2 to the direction of the matter to be treated W. A direct light preventive film 3 is formed in the area where the direct light of the incandescent lamp 1 deviates from the reflector 2 of the outer surface of the incandescent lamp 1. The inner surface of the direct light preventive film 3 reflects near infrared rays, and the outer surface has irregularities of Ra1 μm or more. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in fields such as paint drying and resin molding, and in particular, an incandescent light bulb for a heating device in which light emitted from an incandescent light bulb is directed using a reflecting mirror. The present invention relates to the structure of a reflecting mirror.

[0002]

2. Description of the Related Art Conventionally, heating devices using light have been used in the fields of drying paints for automobile bodies and molding resins.

FIG. 5 is a cross-sectional view of a conventional heating device. The conventional heating device comprises a tube-shaped incandescent lamp 1 and a gutter-shaped reflecting mirror 2 surrounding the incandescent lamp 1. The reflecting surface 21 of the mirror 2 has a parabolic shape, and the incandescent lamp 1
The object to be processed W is heated by the light emitted from the light source and the light reflected by the reflecting mirror 2.

As described above, by using the reflecting mirror 2, of the light emitted from the incandescent lamp 1, the light emitted in the direction opposite to the object W to be processed is reflected by the reflecting mirror 2 toward the object W to be processed. Therefore, the light emitted from the incandescent lamp 1 can be efficiently used for heating.

In FIG. 5, the reflecting surface 21 of the reflecting mirror 2 has a parabolic shape so that the light reflected from the reflecting mirror 2 is parallel. However, in the process of heating an object to be heated, When it is desired to collect light, the reflecting surface 21 of the reflecting mirror 2 may be elliptical.

[0006]

However, in the conventional heating device shown in FIG. 5, among the light emitted directly from the incandescent lamp 1, there is light L which is not applied to the object W to be processed. As shown in FIG. 5, the light L is emitted to the area other than the object W to be processed, and the light emitted from the incandescent light bulb is not efficiently used for heating, or the operator can use the light L There is a problem that the emitted light gets into the eyes and causes glare, which causes the work environment to deteriorate.

The object of the present invention has been made under the circumstances as described above, and since the light is irradiated only on the object to be processed, the light emitted from the incandescent lamp can be efficiently used for heating. It is an object of the present invention to provide a heating device capable of ensuring a good working environment without causing the operator to feel glare.

[0008]

A heating device according to claim 1 comprises a tube-shaped incandescent lamp, and a reflecting mirror which surrounds the incandescent lamp and reflects the light emitted from the incandescent lamp toward the object to be treated. In the heating device, which is an outer surface of the incandescent light bulb, a direct light prevention film is formed in a region where the direct light of the incandescent light bulb deviates from a reflecting mirror, and the direct light prevention film is an inner surface. It is characterized by reflecting near-infrared rays and having an unevenness of Ra 1 μm or more on the outer surface.

A heating device according to a second aspect is the heating device according to the first aspect, and in particular, a far-infrared radiation film is formed on an outer surface of the direct-light preventing film, and the far-infrared radiation is concerned. The outer surface of the film is characterized by having irregularities of Ra 1 μm or more.

A heating device according to a third aspect of the present invention is the heating device according to the first or second aspect, in particular, the outer surface of the incandescent light bulb, and the direct light from the incandescent light bulb is treated. The direct light preventing film and the far infrared ray emitting film are not present at the position where the object is irradiated.

[0011]

1 is a cross-sectional explanatory view of a heating device of the present invention. The heating device of the present invention is a tube type incandescent light bulb 1.
The incandescent light bulb 1 is surrounded by a gutter-shaped reflecting mirror 2, and the reflecting surface 21 of the reflecting mirror 2 has a parabolic shape.

The incandescent light bulb 1 has a filament (not shown) arranged along a tube axis O in a tube type quartz bulb 11, which is the outer surface of the bulb 11 of the incandescent light bulb 1 and radiates from the incandescent bulb 1. Area θ1 where the reflected direct light deviates from the reflecting mirror 2
The direct light prevention film 3 is formed on the. Direct light is reflector 2
The region θ1 deviating from is the virtual planes H1 and H2 connecting the outer ends E1 and E2 of the reflecting surface 21 of the reflecting mirror 2 and the tube axis O intersect the surface of the bulb 11 and are surrounded by the respective virtual planes H1 and H2. The surface portion of the valve 11 on the side of the object W to be processed. In FIG. 1, the direct light prevention film 3 is intentionally shown to be thick for the sake of explanation, but the actual thickness is 1
The thickness is about 00 μm.

That is, the light emitted from the incandescent lamp 1 is
The light that directly goes to the reflection surface 21 and the light that is reflected by the direct light prevention film 3 and goes to the reflection surface 21. As a result, all the light emitted from the incandescent lamp 1 is reflected from the reflection surface 21 and is parallel. It becomes light and is irradiated only to the object W to be processed.

The direct light prevention film 3 is made of a white ceramic member and reflects visible light and near infrared rays, which are light that makes people dazzle, toward the reflecting mirror 2. The direct light prevention film 3 partially absorbs visible light and near-infrared light, and only a part of the visible light and near infrared light that cannot be absorbed depending on the thickness of the direct light prevention film 3 is absorbed by the direct light prevention film 3. It may be transparent. The outer surface of the direct light prevention film 3 has a structure in which the surface roughness has unevenness of Ra 1 μm or more defined by Ra.

According to such a direct light preventing film 3, the light from the incandescent lamp 1, particularly visible light, is hardly emitted to the parts other than the object W to be processed, so that the incandescent lamp is in the eyes of the operator. Visible light from 1 does not enter, no glare is felt, and the working environment can be improved.

Further, since the inner surface of the direct light prevention film 3 reflects the near infrared rays generated from the filament in the direction of the reflecting mirror 2, the light emitted from the incandescent lamp 1 is efficiently used for heating. Is something that can be done.

In addition, the direct light prevention film 3 is heated by the light generated from the filament, and when the direct light prevention film 3 itself becomes high in temperature, it emits far infrared rays as shown by the broken line arrow in FIG. is there. The radiation efficiency of far infrared rays increases as the surface area of the direct light prevention film 3 increases, and if the outer surface of the direct light prevention film 3 has irregularities of Ra 1 μm or more, the far infrared ray emission efficiency is far higher than that of a smooth surface. The infrared radiation efficiency is sufficiently high.

According to the heating device having such a configuration, the object W is irradiated with the near infrared rays from the reflecting mirror 2 and, in addition, the far infrared rays are directly irradiated by the direct light prevention film 3. As a result, the object W is irradiated with both near infrared rays and far infrared rays. For example, when the coating material is dried, the surface of the coating material is actively heated by the far infrared rays, and the inside of the coating material is near infrared rays. As a result, the coating material is heated positively and the coating material can be simultaneously heated from the surface and inside, so that the drying time of the coating material can be shortened.

FIG. 2 shows another embodiment of the present invention, in which a far infrared radiation film 4 is formed on the outer surface of the direct light prevention film 3. The same reference numerals as in FIG. 1 indicate the same parts. The far-infrared radiation film 4 is made of a black ceramic member, and when the input power of the incandescent lamp 1 is increased, the light output is increased, and the direct light prevention film 3 alone makes visible light that humans feel glare. In addition, the near-infrared rays cannot be sufficiently cut, and the amount of visible light and near-infrared rays that pass through the direct light prevention film 3 increases. In such a case, the far infrared radiation film 4 is formed on the outer surface of the direct light prevention film 3.
By providing, it is possible to sufficiently cut visible light and near infrared rays that pass through the direct light prevention film 3. Moreover, if the outer surface of the far-infrared radiation film 4 has a structure having irregularities of Ra 1 μm or more, the far-infrared radiation efficiency can be made sufficiently high. In FIG. 2, the far-infrared radiation film 4 is intentionally shown to be thick for the sake of explanation, but the actual thickness is about 100 μm. In addition, in FIG. 2, far infrared rays are indicated by broken line arrows.

FIG. 3 shows another embodiment of the present invention, which is the outer surface of the incandescent light bulb 1 and in the area θ2 where the direct light from the incandescent light bulb 1 is applied to the object W to be processed, the direct light is prevented. The film 3 is not present. The same reference numerals as in FIG. 1 indicate the same parts. More specifically, virtual planes connecting the outer ends E1 and E2 of the reflecting surface 21 of the reflecting mirror 2 and the tube axis O are defined as virtual planes H1 and H2, respectively, and the outer end portions F1 and F of the workpiece W are defined.
Virtual planes connecting 2 and the tube axis O are defined as H11 and H22. Then, the direct light prevention film 3 is formed on the surface portion of the valve 11 on the object W side surrounded by the virtual planes H1 and H11.
And the direct light prevention film 3 is formed on the surface portion of the valve 11 on the object W side surrounded by the virtual plane H2 and the virtual plane H22.
Are formed.

In other words, the outer end portion F1 of the workpiece W,
A surface area θ2 of the bulb 11 on the object W side surrounded by virtual planes H11 and H22 connecting F2 and the tube axis O is an area where the object W is irradiated with the direct light from the incandescent lamp 1.
The direct light prevention film 3 does not exist in this region θ2. In FIG. 3, the thickness of the direct light prevention film 3 is intentionally increased for the sake of explanation, but the actual thickness is 10
It has a thickness of about 0 μm.

As a result, like the heating device shown in FIG.
Since the light from the incandescent light bulb 1, especially the visible light that makes a person feel glare, is not radiated except for the object W to be processed, the operator cannot see the visible light from the incandescent light bulb 1 and feel the glare. There is no problem, and the working environment can be improved, and since the near-infrared ray is reflected by the direct light prevention film 3 in the direction of the reflecting mirror 2, the light emitted from the incandescent lamp 1 can be efficiently heated. Can be used. In addition, in FIG. 3, far infrared rays are indicated by broken line arrows.

Further, in the case where the material to be processed W is optimally heated by irradiation of near infrared rays,
A part of the light emitted from the incandescent lamp 1 is directly applied to the object to be processed, and the object W to be processed can be heated extremely effectively.

Further, as shown in FIG. 4, by forming the far-infrared radiation film 4 only on the direct-light prevention film 3, the direct-light prevention which occurs when the input power of the incandescent lamp 1 becomes large. It is possible to completely cut off the light transmitted through the film 3, in particular, the visible light and the near-infrared rays that make people dazzle. The same reference numerals as those in FIG. 3 indicate the same parts.
Further, far infrared rays are indicated by broken line arrows. In FIG. 4, the far-infrared radiation film 4 is intentionally expressed with a large thickness for the sake of explanation, but the actual thickness is about 100 μmm.

[0025]

According to the heating device of the present invention, the direct light prevention film is formed on the outer surface of the incandescent light bulb where the direct light of the incandescent light bulb deviates from the reflecting mirror. The inner surface reflects near-infrared rays and the outer surface is R
Since it is a structure having irregularities of 1 μm or more, the structure is such that the light from the incandescent light bulb is not radiated to anything other than the object to be processed, and the direct light of the incandescent light bulb does not enter the eyes of the operator, and no glare is felt. The working environment can be improved. Moreover, since the inner surface of the direct light prevention film reflects near infrared rays generated from the filament in the direction of the reflecting mirror, the light emitted from the incandescent lamp can be efficiently used for heating. Furthermore, the outer surface of the direct light prevention film is R
Since the surface has irregularities of 1 μm or more, the far infrared radiation efficiency is sufficiently high.

[Brief description of drawings]

FIG. 1 is a cross-sectional explanatory view of a heating device of the present invention.

FIG. 2 is a cross-sectional explanatory view of another heating device of the present invention.

FIG. 3 is a cross-sectional explanatory view of another heating device of the present invention.

FIG. 4 is a cross-sectional explanatory view of another heating device of the present invention.

FIG. 5 is a cross-sectional explanatory view of a conventional heating device.

[Explanation of symbols]

1 incandescent light bulb 11 valves 2 reflector 21 reflective surface 3 Direct light prevention film 4 Far-infrared radiation film W to be processed

Claims (3)

[Claims] 1. A heating device comprising a tube-shaped incandescent lamp and a reflecting mirror that surrounds the incandescent lamp and reflects the light emitted from the incandescent lamp toward the object to be processed, wherein the outer surface of the incandescent lamp is The direct light prevention film is formed in a region where the direct light of the incandescent light bulb deviates from the reflecting mirror, and the direct light prevention film reflects near infrared rays on the inner surface and has an unevenness of Ra1 μm or more on the outer surface. A heating device comprising: 2. A far-infrared radiation film is formed on the outer surface of the direct-light prevention film, and the outer surface of the far-infrared radiation film has irregularities of Ra 1 μm or more. The heating device according to. 3. The direct light prevention film and the far-infrared radiation film are not present on the outer surface of the incandescent light bulb, at the position where the direct light from the incandescent light bulb is irradiated to the object to be processed. The heating device according to claim 1 or 2.