JP2006108010A - Heating unit - Google Patents

Heating unit Download PDF

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JP2006108010A
JP2006108010A JP2004295667A JP2004295667A JP2006108010A JP 2006108010 A JP2006108010 A JP 2006108010A JP 2004295667 A JP2004295667 A JP 2004295667A JP 2004295667 A JP2004295667 A JP 2004295667A JP 2006108010 A JP2006108010 A JP 2006108010A
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control member
light control
incandescent lamp
heating unit
cooling body
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Yukio Ueshima
由紀夫 上嶋
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Ushio Denki KK
Ushio Inc
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Ushio Denki KK
Ushio Inc
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  • Control Of Resistance Heating (AREA)
  • Resistance Heating (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heating unit in which irradiation of far-infrared rays is prevented to a heated material having light transparency, and in which a front surface and a rear surface can be heated uniformly by near-infrared rays. <P>SOLUTION: As for this heating unit, in the heating unit in which the heated material W is heated by near-infrared rays irradiated from an incandescent lamp 1, between the incandescent lamp 1 and the heated material W, a light control member 2 made of quartz glass is installed. In the light control member 2, a cooling body flow passage 23 is installed in which the cooling body flows for cooling the light controlling member 2. Furthermore, the light controlling member 2 is a hollow cylindrical double tube which is constituted of an inside tube 21 made of quartz glass and an outside tube 22 made of quartz glass, and a clearance between the inside tube 21 and the outside tube 22 becomes the cooling body flow passage 23 for making the cooling body flow. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

この発明は、ペットボトル等の樹脂加熱、フラットパネル用ガラス基板の加熱など、光透過性部材の加熱に利用される加熱ユニットに関するものである。   The present invention relates to a heating unit used for heating a light transmissive member such as resin heating of a plastic bottle or the like, or heating of a glass substrate for a flat panel.

従来から、炭酸飲料、果汁、ミネラルウォーター等の清涼飲料水の容器としてポリエチレンテレフタレート樹脂を加熱しブロー成形したペットボトルが知られている。
このようなポリエチレンテレフタレート樹脂の加熱には、加熱エネルギー制御のしやすさ、ポリエチレンテレフタレートが光透過性部材である観点から加熱源として白熱ランプが利用されている。 Conventionally, PET bottles in which polyethylene terephthalate resin is heated and blow-molded are used as containers for soft drinks such as carbonated drinks, fruit juices, and mineral water.
For heating such a polyethylene terephthalate resin, an incandescent lamp is used as a heating source from the viewpoint of easy control of heating energy and the viewpoint that polyethylene terephthalate is a light-transmitting member.

ポリエチレンテレフタレート樹脂を加熱する際、ポリエチレンテレフタレート樹脂の白熱ランプ側の表面温度と反対側の裏面温度に著しい差が生じていると、ポリエチレンテレフタレート樹脂をブロー成形した際に偏肉が発生して、製品不良を起こすという問題があった。   When heating polyethylene terephthalate resin, if there is a significant difference between the surface temperature of the incandescent lamp side of polyethylene terephthalate resin and the opposite side temperature, uneven thickness will occur when polyethylene terephthalate resin is blow-molded. There was a problem of causing defects.

このような問題が起こる原因として、ポリエチレンテレフタレート樹脂を加熱する際、波長３０００ｎｍ以上の遠赤外線で加熱するとポリエチレンテレフタレート樹脂の表面で遠赤外線が吸収され、裏面まで届かない現象が発生し、表面と裏面との間で大きな温度差が生じてしまうからである。   As a cause of such problems, when heating polyethylene terephthalate resin with far infrared rays having a wavelength of 3000 nm or more, the far infrared rays are absorbed on the surface of the polyethylene terephthalate resin and the phenomenon of not reaching the back surface occurs. This is because a large temperature difference occurs between the two.

このような問題を回避するために、予め白熱ランプから遠赤外線がほとんど放射されず、波長７５０〜３０００ｎｍの近赤外線が主に放射されるように、コイル径やコイル長、入力電力を規定した白熱ランプを用いて、ポリエチレンテレフタレート樹脂の表面と裏面との間で温度差が生じないように加熱していた。
これは、近赤外線は被加熱物の表面に吸収される割合が少なく、表面から裏面に渡り略均一に加熱できる特性を有しているからである。
特開２００１−２１０６０４号 In order to avoid such problems, incandescent lamps that predetermine the coil diameter, coil length, and input power so that far-infrared rays are hardly emitted from the incandescent lamp and near-infrared rays having a wavelength of 750 to 3000 nm are mainly emitted. A lamp was used to heat the polyethylene terephthalate resin so that there was no temperature difference between the front and back surfaces.
This is because near infrared rays have a characteristic that they can be heated substantially uniformly from the front surface to the back surface because the ratio of the near infrared rays absorbed by the surface of the object to be heated is small.
JP 2001-210604 A

しかしながら、予め近赤外線を放射するように設計した白熱ランプであっても、フィラメントは連続スペクトルの光を放射するものであり、遠赤外線も若干放射するものであり、遠赤外線は白熱ランプを構成している石英ガラス製の発光管に常に吸収され、白熱ランプを連続点灯していると、発光管が５００〜８００℃程度の高温になる。   However, even incandescent lamps designed to radiate near infrared rays in advance, filaments emit continuous spectrum light, far infrared rays also radiate slightly, and far infrared rays constitute incandescent lamps. When the incandescent lamp is continuously lit, it is constantly absorbed by the quartz glass arc tube, and the arc tube becomes a high temperature of about 500 to 800 ° C.

そして、高温になった発光管からの２次輻射として遠赤外線が放射されることになり、予め主に近赤外線を放射するように設計した白熱ランプを用いてポリエチレンテレフタレート樹脂を加熱しても、結果的に、遠赤外線でも加熱することになり、ポリエチレンテレフタレート樹脂の表面と裏面との間で大きな温度差が生じてしまい、ポリエチレンテレフタレート樹脂をブロー成形した際に偏肉が発生して、製品不良を起こすという問題があった。   And far infrared rays will be radiated as secondary radiation from the arc tube that has become high temperature, even if polyethylene terephthalate resin is heated using an incandescent lamp designed to radiate mainly near infrared rays in advance, As a result, even far infrared rays will be heated, resulting in a large temperature difference between the front and back surfaces of the polyethylene terephthalate resin, resulting in uneven thickness when blow-molding the polyethylene terephthalate resin, resulting in product defects There was a problem of waking up.

本発明は、このような問題を解決するためになされたものであって、ポリエチレンテレフタレート樹脂のようなペットボトル用の樹脂や、フラットパネル用ガラス基板などの光透過性の被加熱物への遠赤外線の照射を防止し、近赤外線で被加熱物の表面裏面を均一に加熱することができる加熱ユニットを提供するものである。   The present invention has been made in order to solve such problems, and is far away from a plastic bottle resin such as polyethylene terephthalate resin or a light-transmitted object such as a flat panel glass substrate. An object of the present invention is to provide a heating unit that can prevent infrared irradiation and can uniformly heat the front and back surfaces of the object to be heated with near infrared rays.

請求項１に記載の加熱ユニットは、白熱ランプから放射された近赤外線によって被加熱物を加熱する加熱ユニットにおいて、前記白熱ランプと被加熱物との間に、石英ガラス製の光制御部材が設けられており、前記光制御部材は、内部に当該光制御部材を冷却するための冷却体が流れる冷却体流路が設けられていることを特徴とする加熱ユニット。   The heating unit according to claim 1 is a heating unit that heats an object to be heated by near infrared rays emitted from an incandescent lamp, and a light control member made of quartz glass is provided between the incandescent lamp and the object to be heated. The heating unit is characterized in that the light control member is provided with a cooling body passage through which a cooling body for cooling the light control member flows.

請求項２に記載の加熱ユニットは、請求項１に記載の加熱ユニットであって、特に、前記白熱ランプは両端に封止部を有する管型白熱ランプであって、前記光制御部材は、石英ガラス製の内側管と石英ガラス製の外側管とよりなる中空円筒状の２重管であって、内側管と外側管の間が当該光制御部材を冷却するための冷却体が流れる冷却体流路となっており、前記白熱ランプは、前記光制御部材の内側管の内側に配置されていることを特徴とする。   The heating unit according to claim 2 is the heating unit according to claim 1, and in particular, the incandescent lamp is a tubular incandescent lamp having sealing portions at both ends, and the light control member is made of quartz. A hollow cylindrical double tube composed of an inner tube made of glass and an outer tube made of quartz glass, and a cooling body flow through which a cooling body for cooling the light control member flows between the inner tube and the outer tube The incandescent lamp is arranged inside the inner tube of the light control member.

請求項３に記載の加熱ユニットは、請求項１に記載の加熱ユニットであって、特に、前記白熱ランプを取り囲むように反射鏡が設けられ、当該反射鏡の開口を覆うように石英ガラス製の光制御部材が設けられていることを特徴とする。   The heating unit according to claim 3 is the heating unit according to claim 1, and in particular, a reflecting mirror is provided so as to surround the incandescent lamp, and the heating unit is made of quartz glass so as to cover the opening of the reflecting mirror. A light control member is provided.

本発明の加熱ユニットによれば、白熱ランプと被加熱物との間に、石英ガラス製の光制御部材が配置され、この光制御部材は石英ガラス製であるために、石英ガラスの特性である、白熱ランプから放射された７５０〜３０００ｎｍの近赤外線の透過率が高く、３０００ｎｍ以上の遠赤外線では透過率が減少し、逆に吸収率が増加するものであり、被加熱物に遠赤外線が照射されることを抑制することができる。
さらに、光制御部材が石英ガラスであるために、遠赤外線を吸収して加熱されても、光制御部材の冷却流路に冷却体が流れているので、光制御部材の温度上昇が抑制され、高温状態にならないので、光制御部材から被加熱物の加熱に影響を及ぼすような２次輻射の遠赤外線が放射されることない。
この結果、被加熱物を主に近赤外線で加熱し、被加熱物に遠赤外線がほとんど照射されないようにすることができる。 According to the heating unit of the present invention, the light control member made of quartz glass is disposed between the incandescent lamp and the object to be heated, and this light control member is made of quartz glass, so that it has the characteristics of quartz glass. The transmittance of near-infrared rays of 750 to 3000 nm emitted from an incandescent lamp is high, and the far-infrared rays of 3000 nm or more decrease the transmittance and conversely increase the absorption rate. It can be suppressed.
Furthermore, since the light control member is made of quartz glass, even if it absorbs far infrared rays and is heated, the cooling body flows in the cooling flow path of the light control member, so the temperature rise of the light control member is suppressed, Since it does not reach a high temperature state, far-infrared rays of secondary radiation that affect the heating of the object to be heated are not emitted from the light control member.
As a result, the object to be heated can be mainly heated with near infrared rays so that far infrared rays are hardly irradiated to the object to be heated.

本発明の加熱ユニットを、図１、図２、図３を用いて説明する。
図１は、本発明の加熱ユニットに用いられる白熱ランプの説明図である。
図２は、本発明の加熱ユニットの一部断面図であり、図３は光制御部材の端部の拡大断面図であり、図４は、図２中のＡ−Ａ断面図を示す。
図１に示すように、白熱ランプ１は、外径１０ｍｍの石英ガラス製のバルブ１０の内部にフィラメント１１が配置されており、両端に形成された封止部１２に接着剤を用いてセラミック製のベース１３が取り付けられている。
バルブ１０内には、不活性ガスとハロゲン化物が封入されており、このヒータランプ１は定格２００Ｖ、１０００Ｗで点灯されるものである。 The heating unit of the present invention will be described with reference to FIGS.
FIG. 1 is an explanatory diagram of an incandescent lamp used in the heating unit of the present invention.
2 is a partial cross-sectional view of the heating unit of the present invention, FIG. 3 is an enlarged cross-sectional view of an end portion of the light control member, and FIG. 4 is a cross-sectional view taken along line AA in FIG.
As shown in FIG. 1, the incandescent lamp 1 has a filament 11 disposed inside a quartz glass bulb 10 having an outer diameter of 10 mm, and is made of ceramic by using an adhesive for sealing portions 12 formed at both ends. The base 13 is attached.
An inert gas and a halide are enclosed in the bulb 10, and the heater lamp 1 is lit at a rating of 200V and 1000W.

光制御部材２は、同心円状に厚さ１ｍｍの石英ガラス製の内側管２１と厚さ１ｍｍの石英ガラス製の外側管２２を有する中空円筒状の２重管構造であり、図３に示すように、内側管２１と外側管２２の両端は溶着されて、内側管２１と外側管２２との間には１ｍｍの間隙が形成され、後述する冷却体が流れる冷却流路２３になっている。   The light control member 2 has a hollow cylindrical double tube structure having a concentric 1 mm thick quartz glass inner tube 21 and a 1 mm thick quartz glass outer tube 22 as shown in FIG. In addition, both ends of the inner tube 21 and the outer tube 22 are welded to form a 1 mm gap between the inner tube 21 and the outer tube 22, thereby forming a cooling flow path 23 through which a cooling body described later flows.

外側管２２の両側には、内側管２１と外側管２２によって形成される冷却流路２３に連通する冷却体流入管２４と冷却体流出管２５が形成されている。   A cooling body inflow pipe 24 and a cooling body outflow pipe 25 communicating with a cooling flow path 23 formed by the inner pipe 21 and the outer pipe 22 are formed on both sides of the outer pipe 22.

また、白熱ランプ１は、保持部材３によって、内側管２１の内側の空間Ｓに配置されている。
この保持部材３は、バネ性を有する線径１ｍｍのステンレス線により形成されており、光制御部材保持部３１、段階的保持部３２、白熱ランプ保持部３３とより構成されており、光制御部材保持部３１は、内径が光制御部材２の外管２２の外径より若干大きくなるようにスプリング状に巻回されており、この光制御部材保持部３１を外管２２の端部に挿入して外管２２を保持し、光制御部材保持部３１に続いて段階的保持部３２が形成され、この段階的保持部３２に続いて白熱ランプ保持部３３が形成され、この白熱ランプ保持部３３は白熱ランプ１の封止部１１に緊密に巻回されて、白熱ランプ１が保持部材３によって光制御部材３の内管２１の内側に配置される。 The incandescent lamp 1 is arranged in the space S inside the inner tube 21 by the holding member 3.
The holding member 3 is formed of a stainless steel wire having a spring diameter of 1 mm, and includes a light control member holding portion 31, a stepped holding portion 32, and an incandescent lamp holding portion 33. The light control member The holding portion 31 is wound in a spring shape so that the inner diameter is slightly larger than the outer diameter of the outer tube 22 of the light control member 2, and the light control member holding portion 31 is inserted into the end of the outer tube 22. The stepped holding part 32 is formed following the light control member holding part 31, the incandescent lamp holding part 33 is formed following the stepped holding part 32, and the incandescent lamp holding part 33 is held. Is tightly wound around the sealing portion 11 of the incandescent lamp 1, and the incandescent lamp 1 is arranged inside the inner tube 21 of the light control member 3 by the holding member 3.

そして、冷却体流入管２４内に冷却体が流れ込み、この流れ込んだ冷却体は冷却流路２３を満たし、さらに、冷却体流出管２５から外部に排出される構造により、光制御部材２を冷却するものである。   Then, the cooling body flows into the cooling body inflow pipe 24, and the cooled cooling body fills the cooling flow path 23 and further cools the light control member 2 by a structure that is discharged to the outside from the cooling body outflow pipe 25. Is.

冷却体は、近赤外線を良好に透過する物質である必要があり、水もしくは空気が好適である。また、遠赤外線を効果的に吸収する作用を有するものであればなお一層好適である。その他の冷却体としては、炭酸ガスや窒素を用いてもよい。
また、白熱ランプ１のバルブ１０と内側管２１との間には、一定の空間が必要である。
これは、バルブ１０と内側管２１が接触した場合、内側管２１は冷却体によって冷却されているので、その冷却されている内側管２１がバルブ１０接触するとバルブ１０が過度に冷却され、バルブ１０の温度が低くなりすぎてバルブ１０内でハロゲンサイクルが良好に働かず、短時間でバルブ１０が黒化する問題が発生する。 The cooling body needs to be a substance that transmits near infrared rays well, and water or air is preferable. Moreover, it is still more suitable if it has the effect | action which absorbs a far infrared ray effectively. Carbon dioxide gas or nitrogen may be used as the other cooling body.
Further, a certain space is required between the bulb 10 and the inner tube 21 of the incandescent lamp 1.
This is because when the valve 10 and the inner tube 21 are in contact with each other, the inner tube 21 is cooled by the cooling body. Therefore, when the cooled inner tube 21 comes into contact with the valve 10, the valve 10 is excessively cooled, and the valve 10 This causes the temperature to become too low, and the halogen cycle does not work well in the bulb 10 and the bulb 10 becomes black in a short time.

次に、図５を用いて、図１に示す加熱ユニットに組み込まれる白熱ランプの分光分布を説明する。
図５に示すように、白熱ランプは、１０００ｎｍにピーク波長を有し、３０００ｎｍ以上の遠赤外線も放射するものであるが、近赤外線領域である７５０〜３０００ｎｍの放射強度が高く、主に近赤外線を放射するランプである。 Next, the spectral distribution of the incandescent lamp incorporated in the heating unit shown in FIG. 1 will be described with reference to FIG.
As shown in FIG. 5, the incandescent lamp has a peak wavelength at 1000 nm and also emits far infrared rays of 3000 nm or more, but has a high radiation intensity of 750 to 3000 nm, which is a near infrared region, and is mainly near infrared rays. It is a lamp that radiates.

図６は、図２に示す石英ガラス製の光制御部材２に利用される石英ガラスの透過率を示すデータである。
このデータから理解されるように、石英ガラスは、波長７５０〜３０００ｎｍの近赤外線領域を９０％以上透過するものあり、３０００ｎｍ以上の遠赤外線領域では透過率が減少し、逆に吸収率が増加するものである。 FIG. 6 is data showing the transmittance of quartz glass used in the light control member 2 made of quartz glass shown in FIG.
As understood from this data, quartz glass transmits 90% or more of the near infrared region having a wavelength of 750 to 3000 nm, and the transmittance decreases in the far infrared region of 3000 nm or more, and conversely, the absorption rate increases. Is.

つまり、白熱ランプ１は石英ガラス製の光制御部材２によって覆われており、白熱ランプ１から放射された７５０〜３０００ｎｍの近赤外線は、光制御部材２を透過して被加熱物に照射される。
一方、白熱ランプ１から放射された３０００ｎｍ以上の遠赤外線は、光制御部材で吸収される割合が高く、被加熱物に照射されることを抑制するようになっている。 That is, the incandescent lamp 1 is covered with the light control member 2 made of quartz glass, and the near infrared rays of 750 to 3000 nm emitted from the incandescent lamp 1 are transmitted through the light control member 2 and irradiated to the object to be heated. .
On the other hand, the far-infrared rays of 3000 nm or more emitted from the incandescent lamp 1 are highly absorbed by the light control member, and are prevented from being irradiated to the object to be heated.

また、白熱ランプ１の点灯中に、光制御部材２に遠赤外線が吸収され、光制御部材２を加熱することになるが、光制御部材２は、冷却流路２３に冷却体が流れているので、光制御部材２の温度上昇が抑制され、高温状態にならないので、光制御部材２から被加熱物の加熱に影響を及ぼすような２次輻射の遠赤外線が放射されることない。   While the incandescent lamp 1 is lit, far-infrared light is absorbed by the light control member 2 and heats the light control member 2. In the light control member 2, the cooling body flows in the cooling flow path 23. Therefore, since the temperature rise of the light control member 2 is suppressed and does not reach a high temperature state, the far infrared ray of secondary radiation that affects the heating of the object to be heated is not emitted from the light control member 2.

この結果、光透過部材２が白熱ランプ１と被処理物Ｗとの間に配置されることになり、光制御部材２は、近赤外線の透過率が高く、さらに、被加熱物の加熱に影響を及ぼすような２次輻射による遠赤外線が放射されないように冷却されているので、ポリエチレンテレフタレート樹脂のようなペットボトル用の樹脂や、フラットパネル用ガラス基板などの光透過性の被加熱物Ｗを加熱する際、可視光を含むが主に近赤外線が被加熱物Ｗに照射され、被加熱物Ｗを表面から裏面に渡り近赤外線で略均一に加熱することができるものである。   As a result, the light transmitting member 2 is disposed between the incandescent lamp 1 and the workpiece W, and the light control member 2 has a high near-infrared transmittance and further affects the heating of the heated object. Because it is cooled so that far-infrared rays due to secondary radiation such as polyethylene terephthalate are not radiated, a plastic bottle resin such as polyethylene terephthalate resin, or a light-transmitting heated object W such as a glass substrate for flat panel is used. When heating, visible light is included, but near-infrared rays are mainly applied to the object to be heated W, and the object to be heated W can be heated substantially uniformly with near-infrared rays from the front surface to the back surface.

図７は、本願発明の加熱ユニットの他の実施例を示す説明図であり、白熱ランプの管軸に直交する方向の断面図である。
白熱ランプ１は図１に示す白熱ランプと同様であって、両端に封止部を有する管型の白熱ランプであり、この白熱ランプ１を取り囲むように、樋状の反射鏡４が設けられている。
そして、反射鏡４の開口４０の縁には、石英ガラス製の光制御部材２が嵌め込まれる溝４１が形成され、この溝４１に光制御部材２が嵌め込まれて、反射鏡４０の開口を覆うようになっている。 FIG. 7 is an explanatory view showing another embodiment of the heating unit of the present invention, and is a cross-sectional view in a direction perpendicular to the tube axis of the incandescent lamp.
The incandescent lamp 1 is similar to the incandescent lamp shown in FIG. 1 and is a tube-type incandescent lamp having sealing portions at both ends, and a bowl-shaped reflecting mirror 4 is provided so as to surround the incandescent lamp 1. Yes.
A groove 41 into which the light control member 2 made of quartz glass is fitted is formed at the edge of the opening 40 of the reflecting mirror 4, and the light control member 2 is fitted into the groove 41 to cover the opening of the reflecting mirror 40. It is like that.

光制御部材２は、厚さ１ｍｍの石英ガラス製の内側板２ａと厚さ１ｍｍの石英ガラス製の外側板２ｂが、隙間１ｍｍとなるように、内側板２ａと外側板２ｂ同士を、その周辺部で溶着して形成されたものであり、この隙間が冷却体が流れる冷却流路２３となっている。
この光制御部材２も石英ガラスであるので図６に示すデータと同じ透過率特性を有するものであり、波長７６０〜３０００ｎｍの近赤外線領域を９０％以上透過するものあり、３０００ｎｍ以上の遠赤外線領域では透過率が減少し、逆に吸収率が増加するものである。 The light control member 2 is formed by connecting the inner plate 2a and the outer plate 2b to each other so that the inner plate 2a made of quartz glass having a thickness of 1 mm and the outer plate 2b made of quartz glass having a thickness of 1 mm have a gap of 1 mm. The gap is a cooling flow path 23 through which the cooling body flows.
Since this light control member 2 is also made of quartz glass, it has the same transmittance characteristics as the data shown in FIG. 6, and transmits 90% or more of the near infrared region having a wavelength of 760 to 3000 nm, and far infrared region of 3000 nm or more. In this case, the transmittance decreases and the absorption rate increases.

なお、図面上では、この冷却流路２３に連通する冷却体流入管と冷却体流出管は省略している。
また、冷却流路２３に流れる冷却体は、上述した冷却体と同様に、代表的なものとして水や空気であり、光制御部材２は、冷却体流入管内に冷却体が流れ込み、この流れ込んだ冷却体は冷却流路２３を満たし、さらに、冷却体流出管から外部に排出される構造により、光制御部材２を冷却するものである。 In the drawing, the cooling body inflow pipe and the cooling body outflow pipe communicating with the cooling flow path 23 are omitted.
In addition, the cooling body flowing in the cooling flow path 23 is typically water or air, like the cooling body described above, and the light control member 2 has flowed into the cooling body inflow pipe. The cooling body fills the cooling flow path 23 and further cools the light control member 2 by a structure that is discharged to the outside from the cooling body outflow pipe.

この結果、白熱ランプ１と被加熱物Ｗとの間に、石英ガラス製の光制御部材２が配置された構造になっており、白熱ランプ１から放射された７６０〜３０００ｎｍの近赤外線は、光制御部材２を透過して被加熱物Ｗに照射され、３０００ｎｍ以上の遠赤外線は、光制御部材で吸収される割合が高く、被加熱物に照射されることを抑制するようになっている。   As a result, the light control member 2 made of quartz glass is disposed between the incandescent lamp 1 and the object to be heated W, and the near infrared ray of 760 to 3000 nm emitted from the incandescent lamp 1 The far infrared ray having a wavelength of 3000 nm or more that is transmitted through the control member 2 and irradiated to the object to be heated is highly absorbed by the light control member, so that the object to be heated is prevented from being irradiated.

さらに、白熱ランプ１の点灯中に、光制御部材２に遠赤外線が吸収され、光制御部材２を加熱することになるが、光制御部材２は、冷却体によって温度が上昇することが抑制され、高温状態にならないので、光制御部材２から被加熱物を加熱する程度の２次輻射の遠赤外線が放射されることない。   Furthermore, while the incandescent lamp 1 is lit, far-infrared rays are absorbed by the light control member 2 and the light control member 2 is heated. However, the light control member 2 is suppressed from increasing in temperature by the cooling body. Since the high temperature state is not reached, far-infrared rays of secondary radiation that heats the object to be heated from the light control member 2 are not emitted.

この結果、光制御部材２は、近赤外線の透過率が高く、さらに、２次輻射による遠赤外線が放射されないように冷却されているので、図２の加熱ユニットと同様に、被加熱物Ｗを表面から裏面に渡り近赤外線で略均一に加熱することができるものである。   As a result, the light control member 2 has a high near-infrared transmittance, and is cooled so that far-infrared rays due to secondary radiation are not emitted. It can be heated substantially uniformly with near infrared rays from the front surface to the back surface.

本発明の加熱ユニットに組み込まれる白熱ランプの説明図である。It is explanatory drawing of the incandescent lamp integrated in the heating unit of this invention. 本発明の加熱ユニットの一部断面説明図である。It is a partial cross section explanatory view of the heating unit of the present invention. 光制御部材の端部の拡大断面図である。It is an expanded sectional view of the edge part of a light control member. 図１中Ａ−Ａ断面図である。It is AA sectional drawing in FIG. 本発明の加熱ユニットに用いられる白熱ランプの分光分布データ説明図である。It is spectral distribution data explanatory drawing of the incandescent lamp used for the heating unit of this invention. 本発明の加熱ユニットに用いられる光制御部材の透過率データ説明図である。It is transmittance | permeability data explanatory drawing of the light control member used for the heating unit of this invention. 本発明の他の加熱ユニットの断面説明図である。It is a section explanatory view of other heating units of the present invention.

符号の説明Explanation of symbols

１ 白熱ランプ
１０ バルブ
１１ フィラメント
１２ 封止部
１３ ベース
２ 光制御部材
２１ 内側管
２２ 外側管
２３ 冷却体流路
３ 保持部材
４ 反射鏡
Ｗ 被加熱物
DESCRIPTION OF SYMBOLS 1 Incandescent lamp 10 Bulb 11 Filament 12 Sealing part 13 Base 2 Light control member 21 Inner tube 22 Outer tube 23 Coolant flow path 3 Holding member 4 Reflector W W

Claims (3)

白熱ランプから放射された近赤外線によって被加熱物を加熱する加熱ユニットにおいて、
前記白熱ランプと被加熱物との間に、石英ガラス製の光制御部材が設けられており、
前記光制御部材は、内部に当該光制御部材を冷却するための冷却体が流れる冷却体流路が設けられていることを特徴とする加熱ユニット。 In a heating unit that heats an object to be heated by near infrared rays emitted from an incandescent lamp,
A light control member made of quartz glass is provided between the incandescent lamp and the object to be heated,
The said light control member is provided with the cooling body flow path through which the cooling body for cooling the said light control member flows, The heating unit characterized by the above-mentioned. 前記白熱ランプは両端に封止部を有する管型白熱ランプであって、
前記光制御部材は、石英ガラス製の内側管と石英ガラス製の外側管とよりなる中空円筒状の２重管であって、内側管と外側管の間が当該光制御部材を冷却するための冷却体が流れる冷却体流路となっており、
前記白熱ランプは、前記光制御部材の内側管の内側に配置されていることを特徴とする請求項１に記載の加熱ユニット。 The incandescent lamp is a tubular incandescent lamp having sealing portions at both ends,
The light control member is a hollow cylindrical double tube composed of an inner tube made of quartz glass and an outer tube made of quartz glass, and the space between the inner tube and the outer tube is for cooling the light control member. It is a cooling body flow path through which the cooling body flows,
The heating unit according to claim 1, wherein the incandescent lamp is disposed inside an inner tube of the light control member. 前記白熱ランプを取り囲むように反射鏡が設けられ、
当該反射鏡の開口を覆うように石英ガラス製の光制御部材が設けられていることを特徴とする請求項１に記載の加熱ユニット。
A reflecting mirror is provided so as to surround the incandescent lamp,
The heating unit according to claim 1, wherein a light control member made of quartz glass is provided so as to cover the opening of the reflecting mirror.
JP2004295667A 2004-10-08 2004-10-08 Heating unit Pending JP2006108010A (en)

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