JP2509779Y2 - Infrared heater - Google Patents
Infrared heaterInfo
- Publication number
- JP2509779Y2 JP2509779Y2 JP1989145514U JP14551489U JP2509779Y2 JP 2509779 Y2 JP2509779 Y2 JP 2509779Y2 JP 1989145514 U JP1989145514 U JP 1989145514U JP 14551489 U JP14551489 U JP 14551489U JP 2509779 Y2 JP2509779 Y2 JP 2509779Y2
- Authority
- JP
- Japan
- Prior art keywords
- plate
- porous metal
- gas
- box
- heater
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は、はんだのリフロー、接着剤のキュアー等に
使用される遠赤外線ヒータに関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a far-infrared heater used for solder reflow, adhesive curing, and the like.
近時の電子機器では軽量・小型化の傾向から小さな面
積に多数の電子部品を搭載したプリント基板（以下「高
密度実装基板」という）が用いられるようになってき
た。高密度実装基板において電子部品をクリームはんだ
で接合したり、或いはこれらを接着剤で接合する時に電
子部品の間隙にクリームはんだを溶解させ、また接着剤
を硬化させるための熱を十分に侵入させなければならな
いものである。この時の加熱装置としてはトンネルの上
下に赤外線ヒータを設置したリフロー炉が用いられた
が、リフロー炉の赤外線ヒータはシースヒータだけを設
置したり、或いは鉄板にヒータを取り付けたものであ
り、これらのヒータは直進する赤外線だけの加熱であっ
たため、電子部品間の間隙や影となる電子部品の裏側を
クリームはんだの溶ける温度まで上げたり、接着剤をキ
ュアする温度まで十分に上げることができなかった。In recent years, electronic devices have come to use printed circuit boards (hereinafter referred to as “high-density mounting boards”) on which a large number of electronic components are mounted in a small area because of the tendency toward lightweight and miniaturization. In high-density mounting boards, when soldering electronic components with cream solder, or when bonding them with adhesive, the solder paste must be melted in the gaps between the electronic components and sufficient heat to cure the adhesive must enter. It is something that must be done. As a heating device at this time, a reflow furnace in which infrared heaters were installed above and below the tunnel was used, but the infrared heater of the reflow furnace is one in which only a sheath heater is installed or a heater is attached to an iron plate. Since the heater was heated only by the infrared rays that went straight, it was not possible to raise the temperature between the solder paste and the temperature at which the solder paste melts on the back side of the electronic components, which is the gap between electronic components and the shadow. .
しかしながら、赤外線と熱風を併用すると間隙や影と
なるところまで加熱できることが分かり本考案出願人は
遠赤外線を効率よく放射するセラミックス層のある多孔
質金属板と電熱ヒータを組合せ、多孔質金属板から熱風
を吹き出させる熱風吹出式の赤外線ヒータを提案した
（実願昭62-20683号）。However, it was found that when infrared rays and hot air are used together, it is possible to heat up to the place where there is a gap or shadow, and the applicant of the present invention combined a porous metal plate with a ceramic layer that efficiently radiates far infrared rays with an electric heater, We proposed a hot-air blowing type infrared heater that blows out hot air (Japanese Patent Application No. 62-20683).
ところで、この熱風吹出式の遠赤外線ヒータは電熱ヒ
ータの温度を上げてもそれに比例して熱風の温度が上が
らず熱効率のよくないものであった。また熱風吹出式の
遠赤外線ヒータは多孔質金属面からの熱風の吹出力が場
所によって相違することがあり、大きなプリント基板で
は熱風の当りが一定とならず、不均一加熱の原因となる
ことがあった。By the way, in the hot-air blowing type far-infrared heater, even if the temperature of the electric heater is increased, the temperature of the hot air does not rise in proportion thereto and the thermal efficiency is not good. Further, in the hot-air blowing type far-infrared heater, the blowing power of the hot air from the porous metal surface may differ depending on the location, so that the hot air may not be constant on a large printed circuit board, which may cause uneven heating. there were.
本考案は上記欠点に鑑みなされたもので、電熱ヒータ
の熱が効率よく気体を加熱し、しかも多孔質金属面から
は均一な熱風を吹き出すことのできる熱風式の赤外線ヒ
ータを提供することにある。The present invention has been made in view of the above drawbacks, and an object of the present invention is to provide a hot-air type infrared heater capable of efficiently heating gas by the heat of an electric heater and blowing uniform hot air from a porous metal surface. .
本考案者は、電熱ヒータ部が気体と接触する面積を増
やせば気体を加熱する際の熱効率が良くなり、また容器
内に流入した気体は一面に多数の穴を空けておくと、こ
れらの穴から均一に流出してゆくことに着目して本考案
を完成させた。The present inventor has found that increasing the area in which the electrothermal heater is in contact with the gas improves the thermal efficiency in heating the gas, and the gas flowing into the container has many holes formed on one surface. The present invention was completed with a focus on the uniform outflow from the.
本考案は、箱状空胴体に電熱ヒータを設置し、該電熱
ヒータ上に多数の穴が穿設された金属製の均熱板を設置
するとともに、さらに該均熱板の上方には表面にセラミ
ックスを付着させた多孔質金属板を均熱板と離間させて
設置し、また前記箱状空胴体には該箱状空胴体内に気体
を供給する流出口を取り付け、該箱状空胴体内に供給さ
れた気体を前記均熱板を経て多孔質金属板から吹き出せ
るべく構成したことを特徴とする赤外線ヒータである。According to the present invention, an electric heater is installed in a box-shaped cavity, a metal uniform plate having a large number of holes is formed on the electric heater, and a surface of the plate is above the uniform plate. A porous metal plate to which ceramics is adhered is installed apart from the soaking plate, and an outlet for supplying gas into the box-shaped cavity is attached to the box-shaped cavity, and the box-shaped cavity is The infrared heater is characterized in that the gas supplied to the air is blown from the porous metal plate through the soaking plate.
本考案に用いる均熱板は金属製であり、熱伝導率の良
好は銅、アルミニューム等が適している。。また、多孔
質金属に付着させるセラミックスとしてはAl2O3、Ti
O2、CrO3、MgO、ZrO、SiO2等、加熱された時に遠赤外線
を放射するものであり、これらは多孔質の金属板に焼き
付けたり溶射することにより付着させるものである。The soaking plate used in the present invention is made of metal, and copper, aluminum or the like is suitable because of its good thermal conductivity. . Also, as ceramics to be attached to the porous metal, Al 2 O 3 , Ti
O 2 , CrO 3 , MgO, ZrO, SiO 2 and the like emit far infrared rays when heated, and these are attached to a porous metal plate by baking or thermal spraying.
電熱ヒータの上に多数の穴が穿設された金属製の均熱
板を設置しておくと、電熱ヒータは該均熱板を加熱し、
熱源が広い面積となるため、ここを通過する気体は効率
よく加熱される。When a metal soaking plate having a large number of holes is installed on the electric heater, the electric heater heats the soaking plate,
Since the heat source has a large area, the gas passing therethrough is efficiently heated.
前記均熱板に多数の穴を明けておくと箱体内に流入し
た気体は、これらの穴から流出してゆく時に整流され均
一となる。また、この整流された気体は多孔質金属板を
通過する時にもさらに整流化され、そして均熱板と多孔
質金属板とが離間して設置されているため、多孔質板の
裏面に均等に当たって多孔質金属板表面のどの部分から
も均一な気体が吹き出される。When a large number of holes are opened in the heat equalizing plate, the gas flowing into the box body is rectified and becomes uniform as it flows out from these holes. Further, the rectified gas is further rectified even when passing through the porous metal plate, and since the soaking plate and the porous metal plate are installed apart from each other, the gas uniformly hits the back surface of the porous plate. A uniform gas is blown out from any part of the surface of the porous metal plate.
多孔質金属板に付着させたセラミックスは遠赤外線を
放射するため、クリームはんだの溶解や接着剤のキュア
に適している。Since the ceramics attached to the porous metal plate emits far infrared rays, it is suitable for melting cream solder and curing adhesives.
本考案にかかる赤外線ヒータは、添付図面に示す如
く、箱状空胴体１、電熱ヒータ２、均熱板３、多孔質金
属板４、セラミックス層５および気体流入口６から構成
されている。As shown in the accompanying drawings, the infrared heater according to the present invention comprises a box-shaped cavity 1, an electric heater 2, a soaking plate 3, a porous metal plate 4, a ceramics layer 5 and a gas inlet 6.
箱状空胴体１内にはシースの電熱ヒータ２が蛇行状態
で水平に設置されている。該電熱ヒータの上には多数の
穴７…が穿設された金属製の均熱板３が設置されてい
る。電熱ヒータ２と均熱板３とは離間してもよいが、こ
れらを接触させて設置したり、或いは溶接・ろう接等で
接合させておくと電熱ヒータから均熱板への熱の伝播が
良好となる。均熱板３の上方には多孔質金属板４が均熱
板と離間して設置されている。多孔質金属板とは金属粉
を粗状に焼結したもの、或いは金属を電解液で電鋳した
もの（商品名：セルメット）等の通気性のある金属板で
ある。気体流入口６は、箱状空胴体１の側面または底面
に取り付け、図示しないコンプレッサー、或るいは気体
を圧縮したボンベ等と接続されており、箱状空胴体内に
気体を矢印Ａ方向に導入するようになっている。An electric heater 2 having a sheath is horizontally installed in the box-shaped cavity 1 in a meandering state. A metal soaking plate 3 having a large number of holes 7 is provided on the electric heater. The electric heater 2 and the soaking plate 3 may be separated from each other, but if they are installed in contact with each other, or joined by welding, brazing, etc., the heat transfer from the electric heater to the soaking plate will occur. It will be good. A porous metal plate 4 is installed above the soaking plate 3 so as to be separated from the soaking plate. The porous metal plate is a metal plate having air permeability such as one obtained by roughly sintering metal powder or one obtained by electroforming a metal with an electrolytic solution (trade name: Celmet). The gas inlet 6 is attached to the side surface or the bottom surface of the box-shaped cavity 1 and is connected to a compressor (not shown) or a gas-compressed cylinder or the like to introduce the gas into the box-shaped cavity in the direction of arrow A. It is supposed to do.
本考案にかかる赤外線ヒータはリフロー炉のトンネン
内の上下に設置して使用するのに特に適しているが、そ
れのみに制限されるものではない。The infrared heater according to the present invention is particularly suitable for being installed and used in the upper and lower sides of the reflow furnace, but is not limited thereto.
次に本考案の赤外線ヒータの加熱状態について説明す
る。Next, the heating state of the infrared heater of the present invention will be described.
先ず、電熱ヒータ２に通電を行う。電熱ヒータ２が加
熱されると、その上に置かれた均熱板３が加熱され、さ
らにその上に離間して設置された多孔質金属板４が加熱
される。斯様にして均熱板と多孔質金属板等が加熱され
たならば、気体流入口６から気体（空気またはN2、C
O2、Ar、He等の不活性ガス）を箱状空胴体１内に導入す
る。すると気体は電熱ヒータ、均熱板および多孔質金属
板で加熱されて熱風となって出てくる。この時、流入口
から空胴箱体内に流入した気体は流入口近くでは勢いが
強く、流入口から離れた所では勢いが弱くなっており、
また空胴体内では流れが乱れた状態となっているが、均
熱板を通過する時に多数の穴７…で分散され勢いが均等
となって、さらに流れも整流化される。しかも均熱板で
均等化され整流化された気体は多孔質金属坂の裏面に均
等に当たって多孔質金属板を通過するときにさらにそれ
らが向上するものである。本考案の赤外線ヒータでは熱
風の吹き出しの他、多孔質金属板が加熱されるとその表
面のセラミックスから遠赤外線が放射される。First, the electric heater 2 is energized. When the electric heater 2 is heated, the soaking plate 3 placed thereon is heated, and further, the porous metal plate 4 placed apart therefrom is heated. When the soaking plate and the porous metal plate are heated in this way, the gas (air or N 2 , C
(Inert gas such as O 2 , Ar, He) is introduced into the box-shaped cavity 1. Then, the gas is heated by the electric heater, the heat equalizing plate and the porous metal plate to come out as hot air. At this time, the gas flowing into the hollow box body from the inlet has strong momentum near the inlet, and weakness at the place away from the inlet.
Further, the flow is turbulent in the cavity, but when passing through the heat equalizing plate, the holes are dispersed by a large number of holes 7 so that the momentum becomes even and the flow is further rectified. Moreover, the gas that has been equalized and rectified by the heat equalizing plate evenly hits the back surface of the porous metal slope and is further improved when passing through the porous metal plate. In the infrared heater of the present invention, in addition to blowing hot air, when the porous metal plate is heated, far infrared rays are emitted from the ceramics on the surface thereof.
本考案にかかる赤外線ヒータは電熱ヒータの熱が表面
積の大きな均熱板に伝播されるため、ここを通過する気
体は効率よく加熱される。また均熱板に穿設した多数の
穴は乱れた気体の流れを整流化させ、そして均熱板と多
孔質金属板とが離間して設置されていることから、均熱
板で整流化された気体は多孔質金属板の裏面に均等に当
たり、しかも多孔質金属板が整流化を向上させるため多
孔質金属板表面から吹き出す気体はどの部分からも均等
となる。さらに、この均等吹き出しの熱風はセラミック
スから放射される遠赤外線の加熱も均等化させるため高
密度実装基板や大きな基板でも均等な加熱が行えるとい
う優れた効果を有している。In the infrared heater according to the present invention, the heat of the electric heater is transmitted to the heat equalizing plate having a large surface area, so that the gas passing therethrough is efficiently heated. Further, a large number of holes formed in the heat equalizing plate straightens the turbulent gas flow, and since the heat equalizing plate and the porous metal plate are installed separately from each other, they are straightened by the heat equalizing plate. The gas evenly hits the back surface of the porous metal plate, and since the porous metal plate improves rectification, the gas blown out from the surface of the porous metal plate becomes uniform from any part. Further, this uniform blowing of hot air equalizes the heating of far infrared rays radiated from the ceramics, so that it has an excellent effect that uniform heating can be performed even on a high-density mounting substrate or a large substrate.
第１図は本考案の赤外線ヒータの一部破断した斜視図、
第２図は同正面断面図である。 １……箱状空胴体、２……電熱ヒータ ３……均熱板、４……多孔質金属板 ５……セラミックス、６……気体流入口、７……穴FIG. 1 is a partially cutaway perspective view of an infrared heater of the present invention,
FIG. 2 is a front sectional view of the same. 1 ... Box-shaped cavity, 2 ... Electric heater 3 ... Soaking plate, 4 ... Porous metal plate 5 ... Ceramics, 6 ... Gas inlet, 7 ... Hole
Claims (1)
ヒータ上に多数の穴が穿設された金属製の均熱板を設置
するとともに、さらに該均熱板の上方には表面にセラミ
ックスを付着させた多孔質金属板を均熱板と離間させて
設置し、また前記箱状空胴体には該箱状空胴体内に気体
を供給する流入口を取り付け、該箱状空胴体内に供給さ
れた気体を前記均熱板を経て多孔質金属板から吹き出さ
せるべく構成したことを特徴とする赤外線ヒータ。1. An electrothermal heater is installed in a box-shaped cavity, and a metal soaking plate having a large number of holes formed therein is installed on the electroheating heater, and a surface is provided above the soaking plate. A porous metal plate having ceramics adhered to it is installed apart from the soaking plate, and an inlet for supplying gas into the box-shaped cavity is attached to the box-shaped cavity, and the box-shaped cavity is An infrared heater characterized in that the gas supplied therein is blown out from the porous metal plate through the soaking plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989145514U JP2509779Y2 (en) | 1989-12-19 | 1989-12-19 | Infrared heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989145514U JP2509779Y2 (en) | 1989-12-19 | 1989-12-19 | Infrared heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0384581U JPH0384581U (en) | 1991-08-27 |
| JP2509779Y2 true JP2509779Y2 (en) | 1996-09-04 |
Family
ID=31692145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989145514U Expired - Lifetime JP2509779Y2 (en) | 1989-12-19 | 1989-12-19 | Infrared heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2509779Y2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5981881A (en) * | 1982-10-31 | 1984-05-11 | 松下電工株式会社 | Heat generating plate |
| JPH089126B2 (en) * | 1986-07-24 | 1996-01-31 | トヨタ自動車株式会社 | Machining fluid supply device for electric discharge machine |
-
1989
- 1989-12-19 JP JP1989145514U patent/JP2509779Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0384581U (en) | 1991-08-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term |