JP6993728B2 - Hot air drying furnace - Google Patents

Hot air drying furnace Download PDF

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JP6993728B2
JP6993728B2 JP2020023699A JP2020023699A JP6993728B2 JP 6993728 B2 JP6993728 B2 JP 6993728B2 JP 2020023699 A JP2020023699 A JP 2020023699A JP 2020023699 A JP2020023699 A JP 2020023699A JP 6993728 B2 JP6993728 B2 JP 6993728B2
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紀男 中澤
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株式会社八光電機
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本発明は、炉内に収容した被加熱ワークを熱風発生装置から導入した熱風で乾燥する熱風乾燥炉に関する。 The present invention relates to a hot air drying furnace in which a work to be heated housed in the furnace is dried by hot air introduced from a hot air generator.

熱風発生装置から加熱区画域に熱風を導入して、熱と風の相乗効果により被加熱ワークを乾燥する熱風乾燥炉は、乾燥効果が高いものとして認識されているが、単に、熱風を炉内のワークに吹き付け、使用済みの空気を排気口から排出するものでは、炉内での熱風の流れの特定化やワークの影響等により炉内での温度分布にばらつきが大きくなり、結果、均一な乾燥ができないことから、このばらつきを抑えて、炉内環境の均一化を図ろうとする乾燥炉が多々提案されている。 A hot air drying oven that introduces hot air from a hot air generator into the heating area and dries the work to be heated by the synergistic effect of heat and air is recognized as having a high drying effect, but simply heats the hot air inside the furnace. If the used air is blown onto the work and the used air is discharged from the exhaust port, the temperature distribution in the furnace will vary greatly due to the specification of the hot air flow in the furnace and the influence of the work, resulting in uniform results. Since drying is not possible, many drying furnaces have been proposed in which this variation is suppressed and the environment inside the furnace is made uniform.

例えば、被加熱ワークを収容した炉体に熱風吹出し口と熱風吸い込み口を設け、熱風発生機で発生した熱風を炉内に吹き出し、使用済みの熱風を熱風発生機に戻すように構成される箱形の乾燥炉において、炉内の被乾燥材側面に沿う位置に遮蔽板を設置し、遮蔽板を挟んで被乾燥材側と反対側となる空間に熱気循環流を形成する炉内ファンを設けて構成し、炉内ファンと遮蔽板により熱風吹出し口からの距離とは無関係に、被乾燥材のどの部分でも熱風の風速を均一にしようとした特許文献1の乾燥炉や、乾燥室下部から乾燥室内に吹き上げ吐出される熱風の吐出量分布のばらつきを標準化し、乾燥品質を安定化しようとする乾燥機として、乾燥室下部の熱風通路に熱風の風量調整の調整板を設け、また、炉上部に向け熱風の室内への吐出口となる孔を設けた整流板を設けて、調整板により熱風の一部の流れを変えるなどにより熱風の吹き上げ吐出量を配分調整しようとした特許文献2のような乾燥機が提案されている。 For example, a box configured to provide a hot air outlet and a hot air suction port in the furnace body containing the work to be heated, blow out the hot air generated by the hot air generator into the furnace, and return the used hot air to the hot air generator. In a type of drying furnace, a shielding plate is installed at a position along the side surface of the material to be dried in the furnace, and a fan inside the furnace is provided in the space opposite to the side of the material to be dried with the shielding plate in between. From the drying furnace of Patent Document 1 in which the air velocity of hot air is made uniform in any part of the material to be dried, regardless of the distance from the hot air outlet by the fan in the furnace and the shielding plate, or from the lower part of the drying chamber. As a dryer that aims to stabilize the drying quality by standardizing the variation in the discharge amount distribution of hot air blown up and discharged into the drying chamber, a hot air volume adjustment plate is installed in the hot air passage at the bottom of the drying chamber, and a furnace is also provided. 2. Such dryers have been proposed.

また、ボックスタイプの閉鎖式の熱風乾燥炉ではなく、ワークを移動しながら乾燥するコンベアー炉に熱風を利用するものとして、例えば、炉内のコンベアー走行路から上下に離間して赤外線源を配置し、該炉内に熱風発生装置からの熱風をコンベアーに向け吹きつけると同時に、ファンにより炉内の熱風を強制的に撹拌して温度制御しようとする特許文献3のようなコンベアー炉が提案されている。 In addition, instead of a box-type closed hot air drying furnace, hot air is used in a conveyor furnace that dries while moving the work. For example, infrared sources are placed vertically separated from the conveyor running path in the furnace. A conveyor furnace as in Patent Document 3, which attempts to control the temperature by forcibly stirring the hot air in the furnace with a fan at the same time as blowing the hot air from the hot air generator toward the conveyor in the furnace, has been proposed. There is.

特開平6-34268号公報Japanese Unexamined Patent Publication No. 6-34268 特開2010-249469号公報Japanese Unexamined Patent Publication No. 2010-244696 特開2000-160260号公報Japanese Unexamined Patent Publication No. 2000-160260

これらの炉は加熱区画域(例えば炉内)の被加熱ワークに如何にして均一な熱風を供給し、炉内温度の安定を保つかを課題としており、それぞれ、遮蔽板とファンによりワークへの熱風の風速を均一にしようとしたり、調整板や整流板により熱風の吹き上げ吐出量を配分調整しようとしたり、あるいは、赤外線源の利用と並行し、撹拌ファンを用い強制撹拌をするなどして温度の安定化を図っているが、炉内では、ワーク自体の存在によっても空気の流れなどの環境が変わってしまい、ワークに直接熱風を吹き付ける従来の形態では、該ワークに供給される熱風は吐出段階でいくら調整しても、これを均一化することには限界がある。 The challenge for these furnaces is how to supply uniform hot air to the work to be heated in the heating area (for example, inside the furnace) and keep the temperature inside the furnace stable. Trying to make the air velocity of hot air uniform, trying to distribute and adjust the amount of hot air blown up and discharged by an adjustment plate or rectifying plate, or forcibly stirring using a stirring fan in parallel with the use of an infrared source, etc. However, in the furnace, the environment such as the air flow changes due to the presence of the work itself, and in the conventional form in which hot air is blown directly onto the work, the hot air supplied to the work is discharged. No matter how much adjustment is made in stages, there is a limit to making this uniform.

また、熱風乾燥炉といえば、当然、被加熱ワークに熱風を吹き付けて乾燥するものであるため、ワークとして、紛体など風に飛ばされてしまうような軽量のものや、風圧により変形してしまうようなものは、熱風乾燥炉の対象となるワークではなかった。 In addition, since a hot air drying furnace naturally blows hot air onto the work to be heated to dry it, the work may be a lightweight work such as powder that is blown by the wind, or it may be deformed by wind pressure. What was not the target work of the hot air drying oven.

そこで、本発明は、熱風発生装置から導入する熱風の流れを調整することにより、被加熱ワークを収容、または、設置した加熱区画域の雰囲気温度を均一化し、結果、ワークの乾燥品質を向上することを課題とした。 Therefore, the present invention adjusts the flow of hot air introduced from the hot air generator to equalize the atmospheric temperature of the heated compartment area in which the work to be heated is accommodated or installed, and as a result, the drying quality of the work is improved. That was the issue.

また、熱風乾燥炉でありながら紛体など風圧により影響をうけてしまうような被加熱ワークについても適用することができる熱風乾燥炉を提供することを課題とした。 Another object of the present invention is to provide a hot air drying furnace that can be applied to a work to be heated such as powder that is affected by wind pressure even though it is a hot air drying furnace.

本発明の熱風乾燥炉は、加熱区画域に熱風を導入して被加熱ワークを乾燥する乾燥炉において、区画域外に配置する熱風乾燥装置と、区画域内(乾燥炉内)の底面近傍の対面する側面に沿って対向して設けられ、前方から後方に亘り列を形成して配置される熱風の吐出口を含む熱風吹き出し部と、該熱風吹き出し部の両端近傍位に接続され、熱風発生装置からの加熱エアーを導入する熱風供給通路と、乾燥炉内から外部へのエアーの排気部となる上面中央部に前記熱風吹き出し部と平行に設けられ、前方から後方に亘り列を形成して配置される熱風の排出口を含む熱風戻し口、及び、排気通路を備えて構成し、前記吐出口を、熱風吹き出し部を乾燥炉内に設定したさいの炉の側面に沿って上方に向く上面、及び、炉の底面沿って対向側面に向く側面に設け、前記熱風吹き出し部の吐出口から吹き出す熱風の吐出方向が、直接ワークに向かわず、乾燥炉内の壁面の側面から上面及び底面に沿って平行か、あるいは、僅かに壁面に向けほぼ平行方向に設定されてなる。
また、熱風吹き出し部は、乾燥炉内の底面近傍に加えて、上面近傍の対面する側面に沿って対向して設けられても良く、また、熱風戻し口は乾燥炉内の上面中央部に加えて、底面中央部に設けられても良い。
更に、熱風乾燥炉は、コンベアー炉であることが好ましく、該コンベアー炉の底面近傍に設ける熱風吹き出し口は、コンベアーベルトより下方に位置し、上面近傍に設ける熱風吹き出し口はコンベアーベルトより上方に位置することが好ましい。
The hot air drying furnace of the present invention is a drying furnace in which hot air is introduced into a heated compartment to dry the work to be heated, and the hot air drying device arranged outside the compartment faces the hot air drying device in the compartment (inside the drying furnace) near the bottom surface . A hot air blowing part including a hot air discharge port, which is provided facing each other along the side surface and is arranged in a row from the front to the rear, and a hot air blowing part connected to both ends of the hot air blowing part from the hot air generator. The hot air supply passage for introducing the heated air and the center of the upper surface, which is the exhaust part of the air from the inside of the drying furnace to the outside, are provided in parallel with the hot air blowing part, and are arranged in a row from the front to the rear. A hot air return port including a hot air discharge port and an exhaust passage are provided, and the discharge port is provided with an upper surface facing upward along the side surface of the furnace when the hot air outlet is set in the drying furnace. , Provided on the side surface facing the opposite side surface along the bottom surface of the furnace, the discharge direction of the hot air blown from the discharge port of the hot air blowing portion does not directly face the work, and is parallel from the side surface of the wall surface in the drying furnace along the top surface and the bottom surface. Or, it is set slightly parallel to the wall surface.
Further, the hot air blowing portion may be provided facing each other along the facing side surfaces near the upper surface in addition to the vicinity of the bottom surface in the drying furnace, and the hot air return port may be provided in addition to the central portion of the upper surface in the drying furnace. It may be provided in the center of the bottom surface.
Further, the hot air drying furnace is preferably a conveyor furnace, and the hot air outlet provided near the bottom surface of the conveyor furnace is located below the conveyor belt, and the hot air outlet provided near the top surface is located above the conveyor belt. It is preferable to do so.

(作用)
本手段によると、加熱区画域内の壁面に沿って前方から後方に亘り配置される熱風の吐出口から吐出する熱風が、直接、被加熱ワークに吹き付けないように、乾燥炉の内壁面に沿って平行か、僅かに壁面に向けほぼ平行に設定されていることにより、ワークに強い熱風が吹きつけることが無く、乾燥炉内での熱風の強い流れは炉の周囲の内壁面に沿った流れとなる。
(Action)
According to this means, the hot air discharged from the hot air discharge port arranged from the front to the rear along the wall surface in the heating section area is along the inner wall surface of the drying furnace so as not to be directly blown to the work to be heated. By setting it parallel or slightly parallel to the wall surface, strong hot air does not blow to the work, and the strong flow of hot air in the drying furnace is the flow along the inner wall surface around the furnace. Become.

例えば、熱風吹き出し部を乾燥炉内の底面近傍の対面する側面に前方から後方に沿って対向して備え、吐出口からの吐出方向を、乾燥炉内の側面に沿って上方、及び、底面に沿って該面と平行となる方向に設定し、熱風戻り口を乾燥炉内の上面中央部に前記熱風吹き出し部と平行に備えると、前記熱風の吐出口から吐出される熱風の速く、大きな流れは、乾燥炉内の両側面に沿って上昇し、上面部の熱風戻し部へ向かう流れと、炉内底面の両側面から底面に沿って中央部に向かう流れとなり(図7参照)、前記の通りワークには直接強い熱風が当ることが無く、ワークの周囲を熱風が巡る、あたかも加熱区画域内でワークを周囲から包み込んで加熱するような状態を創りだすことができる。 For example, a hot air blowing portion is provided facing the facing side surface near the bottom surface in the drying furnace from the front to the rear, and the discharge direction from the discharge port is set upward and on the bottom surface along the side surface in the drying furnace. If the hot air return port is set in a direction parallel to the surface along the surface and the hot air return port is provided in the center of the upper surface of the drying furnace in parallel with the hot air outlet, a large flow of hot air discharged from the hot air discharge port is provided. Ascends along both side surfaces in the drying furnace and becomes a flow toward the hot air return portion of the upper surface portion and a flow from both side surfaces of the bottom surface of the furnace toward the central portion along the bottom surface (see FIG. 7). It is possible to create a state in which the hot air does not directly hit the street work, and the hot air circulates around the work, as if the work is wrapped from the surroundings and heated in the heating section area.

また、加熱エアーを熱風発生装置から熱風吹き出し部に導入する熱風供給通路が、該熱風吹き出し部の両端近傍位に配置されているため、加熱エアーが熱風吹き出し部の両側から供給され、中央部に向かいぶつかることで、熱風吹き出し部内のエアーの流れを複雑化することができ、結果、各吐出口から吐出するエアーを均一化することができる。 Further, since the hot air supply passage for introducing the heated air from the hot air generator to the hot air blowing portion is arranged near both ends of the hot air blowing portion, the heated air is supplied from both sides of the hot air blowing portion and reaches the central portion. By colliding with each other, the flow of air in the hot air blowing portion can be complicated, and as a result, the air discharged from each discharge port can be made uniform.

本発明は、従来の熱風乾燥炉における被加熱ワークに直接熱風を吹き付けての乾燥という発想ではなく、乾燥炉内の環境を、熱風を利用して均一化させるといった発想よりなるもので、乾燥炉内壁面に沿って熱風が吐出されることで、熱風による乾燥効果もありながら周囲から被加熱ワークを包み込むような加熱ができる。
よって、本発明の熱風乾燥炉によると、熱風発生装置から導入される熱風の流れを前記手段のように調整することにより、被加熱ワークを収容、または、設置した加熱区画域の雰囲気温度を均一化し、結果、ワークの乾燥品質を向上することができる。
The present invention is not based on the idea of blowing hot air directly onto the work to be heated in the conventional hot air drying furnace, but on the idea of equalizing the environment inside the drying furnace by using hot air. By discharging hot air along the inner wall surface, it is possible to heat the work to be heated from the surroundings while having a drying effect by the hot air.
Therefore, according to the hot air drying furnace of the present invention, by adjusting the flow of hot air introduced from the hot air generator as in the above-mentioned means, the atmospheric temperature of the heated compartment area in which the work to be heated is accommodated or installed is made uniform. As a result, the drying quality of the work can be improved.

また、熱風を利用する乾燥炉でありながら、被加熱ワークに強い熱風が吹き付けないことにより、対象となるワークとして紛体等の軽量のものや風圧により変化してしまうものなどにも適用することができる。 In addition, even though it is a drying furnace that uses hot air, it can be applied to lightweight objects such as powder and those that change due to wind pressure as the target workpieces because strong hot air is not blown onto the workpiece to be heated. can.

本発明の第一の実施の形態で、ボックスタイプの熱風乾燥炉を示す全体構成の正面図(扉方向から見た図)。The front view (the view seen from the door direction) of the whole structure which shows the box type hot air drying furnace in the 1st Embodiment of this invention. 前記形態の側面図。The side view of the said form. 前記形態の熱風発生装置の一例を示す構成図。The block diagram which shows an example of the hot air generator of the said form. 前記形態の熱風吹き出し管を示す構成図。The block diagram which shows the hot air blowing tube of the said form. 前記形態の熱風戻し管を示す構成図。The block diagram which shows the hot air return pipe of the said form. 前記形態の配管と配管内のエアーの動きを示す模式図。The schematic diagram which shows the movement of the pipe and the air in the pipe of the said form. 前記形態の炉内での熱風の主要な動きを示す模式図。The schematic diagram which shows the main movement of the hot air in the furnace of the said form. 前記形態の変形例で熱風発生装置を一台とした熱風乾燥炉を示す全体構成の正面図。The front view of the whole structure which shows the hot air drying furnace which made a hot air generator one unit in the modification of the said form. 本発明の第二の実施の形態で、コンベアー炉タイプの熱風乾燥炉の構成を示す正面図(入口方向側から見た図)。The front view (the view seen from the inlet direction side) which shows the structure of the conveyor furnace type hot air drying furnace in the 2nd Embodiment of this invention. 前記形態の側面図で、熱風の炉外部での流れを示す模式図と乾燥炉の本体部分を示す構成図。In the side view of the said form, the schematic diagram which shows the flow of hot air outside the furnace, and the block diagram which shows the main body part of a drying furnace. 前記形態の熱風吹き出し管を示す構成図。The block diagram which shows the hot air blowing tube of the said form. 前記形態の炉内での熱風の主要な動きを示す模式図。The schematic diagram which shows the main movement of the hot air in the furnace of the said form.

以下、本発明の実施の形態につき図面を参考にしながら詳細に説明する。
図1~図8は、本発明の第一の実施の形態となる閉鎖型ボックスタイプの熱風乾燥炉を示しており、図1は、全体構成を模式的に表した正面図を示しており、図2は、その側面図を示している。尚、理解を容易とするため、図1は扉、図2では側面の外壁が省略された炉内構成が記載される。
本形態の熱風乾燥炉は、複数段設けられた棚71にワークを載置して台車7に搭載する態様で乾燥室内22に収容して用いられる箱形の乾燥炉2で、乾燥室外に設ける複数の熱風発生装置1(本例では4台(1a~1d)を使用)と、該熱風発生装置1の熱風が導入される乾燥炉本体2を備えてなり、乾燥室内22には、底部近傍に配置する、対向する両側面に沿って、ほぼ室内の前方から後方にいっぱいの長さで設ける左右一対の長尺な熱風吹き出し管3と、前記乾燥室22の上面(天井面)の中央部に沿って配置する、前記熱風吹き出し管3と平行する様にほぼ室内の前方から後方にいっぱいの長さで設ける長尺な熱風戻し管4を備えて構成される。そして、熱風乾燥装置1と熱風吹き出し管3は送風通路5により接続され、その送風通路5と熱風吹き出し管3との接続部51は、長尺な熱風吹き出し管3の両端部近傍に設定される。一方、熱風戻し管4と熱風発生装置1は排気通路6により接続されおり、乾燥室内22から排気されるエアーが熱風発生装置1に取り込まれ、熱風循環加熱する構成としている。尚、乾燥炉として当然設置される温度センサーや温度設定、制御装置は適当な位置に公知の装置が設けられれば良い。
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 to 8 show a closed box type hot air drying furnace according to the first embodiment of the present invention, and FIG. 1 shows a front view schematically showing the overall configuration. FIG. 2 shows a side view thereof. For ease of understanding, FIG. 1 shows a door, and FIG. 2 shows an internal configuration in which the outer wall on the side surface is omitted.
The hot air drying furnace of this embodiment is a box-shaped drying furnace 2 used by mounting a work on a shelf 71 provided in a plurality of stages and mounting it on a trolley 7 in a drying chamber 22, and is provided outside the drying chamber. A plurality of hot air generators 1 (four units (1a to 1d) are used in this example) and a drying furnace main body 2 into which the hot air of the hot air generator 1 is introduced are provided, and the drying chamber 22 is near the bottom. A pair of left and right long hot air blowing pipes 3 provided in a length extending from the front to the rear of the room along the opposite side surfaces, and the central portion of the upper surface (ceiling surface) of the drying chamber 22. It is configured to include a long hot air return pipe 4 provided along the above-mentioned hot air blowout pipe 3 so as to be parallel to the hot air blowout pipe 3 and provided with a full length from the front to the rear of the room. The hot air drying device 1 and the hot air blowing pipe 3 are connected by a blowing passage 5, and the connecting portion 51 between the blowing passage 5 and the hot air blowing pipe 3 is set in the vicinity of both ends of the long hot air blowing pipe 3. .. On the other hand, the hot air return pipe 4 and the hot air generator 1 are connected by an exhaust passage 6, and the air exhausted from the drying chamber 22 is taken into the hot air generator 1 to circulate and heat the hot air. As for the temperature sensor, temperature setting, and control device that are naturally installed as a drying furnace, a known device may be provided at an appropriate position.

図3は、前記形態で用いられる熱風発生装置の一例を示している。
熱風発生装置1は、従来の熱風発生装置を用いれば良いため構成、構造の詳細な説明は省略するが、モーター11を稼動することで送風機12が作動し、該送風機12のファンの回転によりエアーが強制的にエアーの吸引口15より送風機12内に取り込まれ、取り込まれたエアーがヒーター13内を通過する間に加熱されて、該送風機12により強制的に送風口14より吐出される。そして送風口14より吐出された熱風が送風通路5を通り熱風吹き出し管3の熱風吐出口32から乾燥室内22へ吐出される。また、本例では、循環熱風加熱が可能となるように、乾燥室内22の加熱されたエアーを、熱風戻し管4から排気通路6を通して熱風発生装置1に一部が回収される構成となっている。尚、この場合でも、熱風発生装置1の吸引口15から取り込まれるエアーは、乾燥室内22からの排気エアーのみではなく、フレッシュエアーが取り込めるように配管されることが好ましい。尚、本例の熱風発生装置1では、前面の上部に送風口14、後面の下部に吸引口15を設けた装置として説明している。
FIG. 3 shows an example of the hot air generator used in the above embodiment.
Since the hot air generator 1 may use a conventional hot air generator, detailed description of the configuration and structure is omitted, but the blower 12 is operated by operating the motor 11, and the air is generated by the rotation of the fan of the blower 12. Is forcibly taken into the blower 12 from the air suction port 15, heated while the taken-in air passes through the heater 13, and is forcibly discharged from the blower port 14 by the blower 12. Then, the hot air discharged from the air outlet 14 passes through the air passage 5 and is discharged from the hot air discharge port 32 of the hot air blowing pipe 3 to the drying chamber 22. Further, in this example, the heated air in the drying chamber 22 is partially recovered from the hot air return pipe 4 to the hot air generator 1 through the exhaust passage 6 so that the circulating hot air can be heated. There is. Even in this case, it is preferable that the air taken in from the suction port 15 of the hot air generator 1 is piped so that not only the exhaust air from the drying chamber 22 but also the fresh air can be taken in. In the hot air generator 1 of this example, the device is described as a device in which a blower port 14 is provided in the upper part of the front surface and a suction port 15 is provided in the lower part of the rear surface.

そして、本形態の乾燥炉では、同一形態の前記熱風発生装置4台(1a、1b、1c、1d)が乾燥炉本体2の上部に前後面(前面が送風口14を備えた面、後面が吸引口15を備えた面とする)が交互となるように並べて用いられ、その送風口14から発生する熱風が、接続された各々の送風通路5を通って、2本一対で形成される熱風吹き出し管3の両端近傍位4か所(一つに2か所)の接続フランジ31に一つずつ導入されるように接続されている。一方、乾燥室内22から排気されるエアーは熱風戻し管5に接続された4本の排気通路6を通して各々の熱風乾燥装置1に戻される様に、排気通路6の端部が熱風発生装置1の吸気口15にフィルター(図示せず)を介して接続されている。また、本例では、吸気口15は二又に形成され、一方がフレッシュエアーの取り込み口16として外部に開放して形成される。尚、本形態においては、熱風発生装置1を4台用いているが、熱風の容量を確保できるものであれば、2台として送風通路を二又に形成しても良く、一台として四つ又に形成したものでも良い。また、本形態で、熱風発生装置4台を前後面交互に配置するのは、後記する熱風吹き出し管3等の配置により送風通路5や排気通路6の配管を効率よく短く設定するための配置である。また、乾燥炉と熱風発生装置の配置関係はどのように設定されても良い。 In the drying furnace of this embodiment, the four hot air generators (1a, 1b, 1c, 1d) of the same embodiment have front and rear surfaces (the front surface is provided with the air outlet 14 and the rear surface is) on the upper portion of the drying furnace main body 2. The surfaces provided with the suction ports 15) are used side by side so as to alternate, and the hot air generated from the air outlets 14 is formed in pairs through each of the connected air passages 5. The blowout pipe 3 is connected so as to be introduced one by one to the connection flanges 31 at four locations (two locations per one) near both ends. On the other hand, the end of the exhaust passage 6 is the hot air generator 1 so that the air exhausted from the drying chamber 22 is returned to each hot air drying device 1 through the four exhaust passages 6 connected to the hot air return pipe 5. It is connected to the intake port 15 via a filter (not shown). Further, in this example, the intake port 15 is formed in two forks, and one of the intake ports 15 is formed to be open to the outside as a fresh air intake port 16. In this embodiment, four hot air generators 1 are used, but if the capacity of hot air can be secured, two blower passages may be formed as two, and four hot air passages may be formed as one. It may also be formed. Further, in this embodiment, the four hot air generators are arranged alternately on the front and rear surfaces in order to efficiently set the pipes of the blower passage 5 and the exhaust passage 6 to be shorter by arranging the hot air blowout pipe 3 and the like, which will be described later. be. Further, the arrangement relationship between the drying furnace and the hot air generator may be set in any way.

乾燥室22は、外壁21、及び、前面の扉23により箱形に形成された乾燥炉本体2の内部に、複数の棚71にワークを積載した台車7を搭載しての使用を想定して、ある程度大きな容積(本例では、幅、奥行き、高さ、各2000mm程度)を備える直方体の空間として形成される。 The drying chamber 22 is assumed to be used by mounting a trolley 7 in which a work is loaded on a plurality of shelves 71 inside a drying furnace main body 2 formed in a box shape by an outer wall 21 and a front door 23. , It is formed as a rectangular parallelepiped space having a certain large volume (in this example, width, depth, height, about 2000 mm each).

図4は、本形態の熱風吹き出し管を示している。
熱風吹き出し管3は、乾燥室底部近傍に、対向する両側面に沿って前方から後方にほぼ室内いっぱいの長さに設定し、両端部を閉塞したステンレス等からなる中空の管状体として形成される。形状等は特定するものではないが、本例については直方体に形成された。そして、乾燥室内22の底面角部に設置したさいに該熱風吹き出し管3の上面、及び、対向面側となる側面に、適当な間隔で配置された乾燥室内22への熱風の吹き出し口となる複数の孔を設けて、熱風吐出口32とした。この吐出口32を前記位置に設定することにより、炉内に導入される熱風は、乾燥室内22の側面に沿った上方、及び、底面に沿って該面に平行する方向に吐出されることになる。(図7参照)
FIG. 4 shows the hot air blowing tube of this embodiment.
The hot air blowout pipe 3 is formed as a hollow tubular body made of stainless steel or the like with both ends closed in the vicinity of the bottom of the drying chamber, set to a length substantially full of the chamber from the front to the rear along the opposite side surfaces. .. The shape etc. are not specified, but in this example, it was formed into a rectangular parallelepiped. Then, when it is installed at the bottom corner of the drying chamber 22, it serves as a hot air outlet to the drying chamber 22 arranged at appropriate intervals on the upper surface of the hot air blowing pipe 3 and the side surface facing the opposite surface. A plurality of holes were provided to form a hot air discharge port 32. By setting the discharge port 32 at the above position, the hot air introduced into the furnace is discharged upward along the side surface of the drying chamber 22 and in the direction parallel to the surface along the bottom surface. Become. (See Fig. 7)

また、該熱風吹き出し管3への熱風発生装置1からの熱風の取り入れ口、即ち、送風通路5との接続部51が、前記の通り熱風吹き出し管3の両端近傍位にフランジ31として設けられる。尚、流体の流れの性質から、該フランジ31からの距離により熱風吐出口32から吐出されるエアー量が変わることから、孔の大きさを端部ほど大きく形成するなど吐出のバランスを考慮した配置、設定とすることが好ましい。また、熱風吐出口32を含む熱風吹き出部は、管状体(熱風吹き出し管3)に限定されるものではなく、例えば、乾燥室底部側面に細長い部屋のような空間として設けられるなどであっても良く、また、熱風吐出口32は、本例の孔に限定することなく細長のスリットや、複数のノズルを適当に配置したようなものであっても良い。 Further, a port for taking in hot air from the hot air generator 1 to the hot air blowing pipe 3, that is, a connecting portion 51 with the blowing passage 5, is provided as flanges 31 near both ends of the hot air blowing pipe 3 as described above. Due to the nature of the fluid flow, the amount of air discharged from the hot air discharge port 32 changes depending on the distance from the flange 31, so the size of the hole is made larger toward the end, and the balance of discharge is taken into consideration. , It is preferable to set it. Further, the hot air blowing portion including the hot air discharging port 32 is not limited to the tubular body (hot air blowing pipe 3), and may be provided as a space like an elongated room on the side surface of the bottom of the drying chamber, for example. Further, the hot air discharge port 32 is not limited to the hole of this example, and may be an elongated slit or a device in which a plurality of nozzles are appropriately arranged.

図5は、本形態の熱風戻し管を示している。
熱風戻し管4は、乾燥室22上面(天井面)の中央部に前記熱風吹き出し管3と平行に前方から後方にほぼ室内いっぱいの長さに設定した、両端部を閉塞したステンレス等からなる中空の管状体として形成され、形状は特定するものではないが本例においては、直方体に形成された。そして、該熱風戻し管4の上面に適当な間隔を設けて、4台の熱風発生装置1が接続する排気通路6の他端を接続するフランジ41を4か所に設け、また、両側面に、適当な間隔で配置される乾燥室内22からの使用済みエアーの排出口となる複数の孔を設けてエアー排気口42とした。このさい、該エアー排気口全体の面積は、乾燥室内のエアー圧の上昇が考慮され、吹き出し口32と同等かより大きく形成されることが好ましい。また、この室内の圧調整あるいは使用後の冷却促進のため乾燥室内22に別途外部への排気口が設けられても良い。
FIG. 5 shows the hot air return pipe of this embodiment.
The hot air return pipe 4 is a hollow made of stainless steel or the like with both ends closed, which is set at the center of the upper surface (ceiling surface) of the drying chamber 22 in parallel with the hot air blowout pipe 3 from the front to the rear so as to be substantially the entire length of the room. It was formed as a tubular body, and although the shape is not specified, in this example, it was formed as a rectangular parallelepiped. Then, an appropriate interval is provided on the upper surface of the hot air return pipe 4, and flanges 41 connecting the other ends of the exhaust passage 6 to which the four hot air generators 1 are connected are provided at four places, and on both side surfaces. The air exhaust port 42 is provided with a plurality of holes serving as exhaust ports for used air from the drying chamber 22 arranged at appropriate intervals. At this time, it is preferable that the area of the entire air exhaust port is formed to be equal to or larger than the outlet 32 in consideration of an increase in air pressure in the drying chamber. Further, an exhaust port to the outside may be separately provided in the drying chamber 22 for pressure adjustment in the chamber or promotion of cooling after use.

尚、熱風戻り口は、管状体に限定されるものではなく、例えば、乾燥室22上面に孔を設けて排気通路6と一体としたようなものでも良く、また、エアー排気口42は、本例の孔に限定することなく細長のスリットや、複数のノズルを適当に配置したようなものであっても良い。 The hot air return port is not limited to the tubular body, and may be, for example, a hole provided on the upper surface of the drying chamber 22 to be integrated with the exhaust passage 6, and the air exhaust port 42 may be a main body. The hole is not limited to the example hole, and an elongated slit or a plurality of nozzles may be appropriately arranged.

そして、熱風吹き出し管3、熱風戻し管4等、熱風の吹き出し部・排気部の炉内での配置は、本形態に限定することものでは無く、炉の大きさや形態により、本発明の炉内全体を周囲から包み込むように加熱する意図に合致するような配置とすればよく、例えば、幅の大きな炉であれば、熱風吹き出し管3を底面近傍ばかりではなく上面近傍にも設けても良く、また、底面近傍側面ではなく底面中央に設け両側面に向けて吐出口を設けることなども考えられる。同様に、熱風戻し管4の設定位置も底面中央に設けるなど、必要に応じて配置、吐出方向などが設定されれば良い。 The arrangement of the hot air blowing portion / exhaust portion in the furnace, such as the hot air blowing pipe 3 and the hot air returning pipe 4, is not limited to this embodiment, and is not limited to this embodiment. The arrangement may be arranged so as to match the intention of heating so as to wrap the whole from the surroundings. For example, in the case of a large-width furnace, the hot air blowing tube 3 may be provided not only near the bottom surface but also near the top surface. It is also conceivable to provide the discharge port toward both side surfaces by providing it in the center of the bottom surface instead of the side surface near the bottom surface. Similarly, the setting position of the hot air return pipe 4 may be provided in the center of the bottom surface, and the arrangement, discharge direction, and the like may be set as necessary.

送風通路5は、熱風発生装置1と熱風吹き出し管3とを接続する耐熱性のフレキシブルホースで、熱風発生装置1の送風口14のフランジ、及び、熱風吹き出し管3の両端部近傍位に備えたフランジ31に両端を接続して形成される。そして、前記の通り4台の熱風発生装置1の各々が対向する2つの熱風吹き出し管3の両端部近傍の接続部51とそれぞれに接続されて構成される、熱風発生装置1からの熱風を熱風吹き出し管3に送る通路である。尚、該送風通路5は、本例の様に乾燥室内22を通しても、乾燥室22と炉の外壁21の間を通しても良い。 The blower passage 5 is a heat-resistant flexible hose that connects the hot air generator 1 and the hot air blowout pipe 3, and is provided near the flange of the blower port 14 of the hot air generator 1 and the vicinity of both ends of the hot air blowout pipe 3. It is formed by connecting both ends to the flange 31. Then, as described above, the hot air from the hot air generator 1 configured to be connected to each of the connecting portions 51 near both ends of the two hot air blowing pipes 3 facing each other of the four hot air generators 1 is blown into hot air. It is a passage to send to the blowout pipe 3. The ventilation passage 5 may be passed through the drying chamber 22 as in this example, or between the drying chamber 22 and the outer wall 21 of the furnace.

排気通路6は、熱風戻し管4と熱風発生装置1とを接続する耐熱性フレキシブルホースで、熱風戻し管4の上面に備えたフランジ41、及び、熱風発生装置1の吸気口15のフランジに両端を接続して形成され、乾燥室22からの排出エアーを熱風発生装置1に戻すための通路である。前記熱風戻し管4には4つのフランジ41部分が備えられており、各々が4台の熱風発生装置1a~1dに対応してそれぞれ接続して形成される。 The exhaust passage 6 is a heat-resistant flexible hose that connects the hot air return pipe 4 and the hot air generator 1, and has both ends on the flange 41 provided on the upper surface of the hot air return pipe 4 and the flange of the intake port 15 of the hot air generator 1. Is a passage for returning the exhaust air from the drying chamber 22 to the hot air generator 1. The hot air return pipe 4 is provided with four flange 41 portions, each of which is formed by being connected to each of the four hot air generators 1a to 1d.

図6は、本形態の熱風発生装置と乾燥室内をつなぐ配管と、該配管内のエアーの動きを表す模式図を示している。
熱風発生装置1と乾燥室内22との配管及び熱風の動きをまとめると、前述の通り、熱風発生装置1から送風通路5を通して、熱風吹き出し管3、乾燥室内22へと至る熱風供給ルートと、乾燥室内22から熱風戻し管4、排気通路6を通して熱風乾燥装置1へと戻る熱風戻りルートがある。
FIG. 6 shows a pipe connecting the hot air generator of the present embodiment and the drying chamber, and a schematic diagram showing the movement of air in the pipe.
To summarize the piping between the hot air generator 1 and the drying chamber 22 and the movement of the hot air, as described above, the hot air supply route from the hot air generator 1 to the hot air blowing pipe 3 and the drying chamber 22 through the air passage 5 and drying. There is a hot air return route from the room 22 to the hot air drying device 1 through the hot air return pipe 4 and the exhaust passage 6.

そして、本形態においては、熱風供給ルートを構成する熱風発生装置1が乾燥炉本体2の上部の幅方向に4台並べられて配置されており、一方、熱風吹き出し管3は前記乾燥室内22底部近傍の対向する両側面に各々長さ方向に設定され、その熱風取り入れ口となるフランジ31が両端部近傍位に配置されている。そのため、熱風発生装置1の送風口14と熱風吹き出し管3のフランジ31をつないでいる送風通路5を短くし効率よく設定する配置として、前記並列される熱風発生装置4台を前後面交互に設定した。そして、本例では、炉の前面から見て向かって一番左側に位置する送風口14が前面側に配置された熱風発生装置1aの送風口14に接続する送風通路5は、炉の左側に配置した熱風吹き出し管3の前方側のフランジ31aに接続し、同様に送風通路5を短く設定する接続となるように、左から2番目の位置で後面側に送風口14を備えた熱風発生装置1bは左側後方側のフランジ31b、右から2番目で前側に送風口14を備えた熱風発生装置1cは右側前方側のフランジ31c、一番右側で後側に送風口14を備えた熱風発生装置1dは右側後方側のフランジ31dに接続される。 In this embodiment, four hot air generators 1 constituting the hot air supply route are arranged side by side in the width direction of the upper part of the drying furnace main body 2, while the hot air blowing pipe 3 is located at the bottom of the drying chamber 22. Flange 31s, which are set in the length direction on both side surfaces facing each other in the vicinity and serve as hot air intake ports thereof, are arranged near both ends. Therefore, the four parallel hot air generators are alternately set on the front and rear surfaces as an arrangement in which the blower passage 5 connecting the blower port 14 of the hot air generator 1 and the flange 31 of the hot air blowout pipe 3 is shortened and efficiently set. did. In this example, the blower passage 5 connected to the blower port 14 of the hot air generator 1a in which the blower port 14 located on the leftmost side when viewed from the front surface of the furnace is arranged on the front side is on the left side of the furnace. A hot air generator equipped with an air outlet 14 on the rear surface side at the second position from the left so as to be connected to the flange 31a on the front side of the arranged hot air blowing pipe 3 and similarly set the air passage 5 short. 1b is a flange 31b on the left rear side, a hot air generator 1c is the second from the right and has a blower port 14 on the front side. 1d is connected to the flange 31d on the right rear side.

一方、前記熱風発生装置1の送風口14と反対面の後面に位置する吸引口15と、乾燥室22の上面に長手方向に配置された熱風戻り管5の熱風排出口となる4つのフランジ41との接続についても、排気通路6を短く効率的に設定する観点から、熱風発生装置1aの吸引口15に接続する排気通路6は、熱風戻し管4の最も奥側のフランジ41aに接続され、他も同様に排気通路6を短く設定する接続となるように、熱風発生装置1bは手前から2番目のフランジ41b、熱風発生装置1cは最も手前のフランジ41c、そして、熱風発生装置1dは奥から2番目のフランジ41dに接続される。尚、本配置は本形態の熱風発生装置と炉の関係から最適な配置を示したもので、他の形態においては当然、その形態に適合する配置が選択されれば良い。 On the other hand, a suction port 15 located on the rear surface opposite to the air outlet 14 of the hot air generator 1 and four flanges 41 serving as hot air discharge ports of the hot air return pipe 5 arranged in the longitudinal direction on the upper surface of the drying chamber 22. From the viewpoint of setting the exhaust passage 6 short and efficiently, the exhaust passage 6 connected to the suction port 15 of the hot air generator 1a is connected to the flange 41a on the innermost side of the hot air return pipe 4. Similarly, the hot air generator 1b is the second flange 41b from the front, the hot air generator 1c is the front flange 41c, and the hot air generator 1d is from the back so that the connection is such that the exhaust passage 6 is set short. It is connected to the second flange 41d. It should be noted that this arrangement shows the optimum arrangement from the relationship between the hot air generator of this embodiment and the furnace, and in other embodiments, of course, an arrangement suitable for that embodiment may be selected.

図7は、本形態の乾燥室内での主要な熱風の流れを表す模式図を示している。
本形態の熱風乾燥炉では、熱風発生装置1より発生した熱風が、送風通路5を通して熱風吹き出し管3に導入され、熱風吐出口32から乾燥室内22に吐出されるが、吹き出し管3に導入される熱風は、該吹き出し管3の両端近傍部(フランジ31)から供給されることで、該熱風は、吹き出し管両端部から中央部に向かって流れ、該中央部でぶつかり、吹き出し管3内でのエアーの流れが複雑化されること、また、熱風吐出口32の大きさを場所によって変える等により、それぞれの吹き出し口32から吐出される熱風が、例えば、一方向からエアーが導入されるものと比較して均一化することが期待できる。
FIG. 7 shows a schematic diagram showing the main flow of hot air in the drying chamber of this embodiment.
In the hot air drying furnace of this embodiment, the hot air generated from the hot air generator 1 is introduced into the hot air blowing pipe 3 through the blowing passage 5, and is discharged from the hot air discharging port 32 into the drying chamber 22, but is introduced into the blowing pipe 3. The hot air is supplied from the vicinity of both ends (flange 31) of the blowout pipe 3, so that the hot air flows from both ends of the blowout pipe toward the central portion, collides with the central portion, and is inside the blowout pipe 3. The hot air discharged from each outlet 32 is introduced from, for example, from one direction due to the complicated flow of air and the change in the size of the hot air outlet 32 depending on the location. It can be expected to be uniform in comparison with.

また、前記熱風吹き出し管3が乾燥室22底部近傍の対向する両側面に、また、熱風戻し管4が乾燥室内22の上面中央部に設置されており、熱風吐出口32が吹き出し管の上面32a及び対向する側面32bに配置されていることから、該吹き出し管3に導入された熱風は、乾燥室22の上方F1、及び、底面に沿う方向F2に吹出され、乾燥室内22での大きなエアーの流れは、対向する両側面から側面に沿って上方に向かう流れF1、上面に沿って熱風戻し管に至る流れF3、及び、対向する両側面から底面に沿って中央部に向かい、中央部でぶつかる流れF2となり、直接被ワークに強い熱風を吹き付けることが無く、あたかも乾燥室22を周囲から包み込むような加熱となり、また、底部中央部でのエアーのぶつかりにより流れが複雑になり、全体として、熱風吹き付けによる乾燥促進効果を大きく損なうことなく、乾燥室内22の環境が均一化されることにより、ワーク全体を均一に乾燥することができるものとなっている。 Further, the hot air blowout pipe 3 is installed on both opposite side surfaces near the bottom of the drying chamber 22, the hot air return pipe 4 is installed in the center of the upper surface of the drying chamber 22, and the hot air discharge port 32 is the upper surface 32a of the blowout pipe. And because it is arranged on the opposite side surface 32b, the hot air introduced into the blowout pipe 3 is blown out in the upper F1 of the drying chamber 22 and the direction F2 along the bottom surface, and the large air in the drying chamber 22 is blown out. The flow is from the opposing side surfaces to the upward flow F1 along the side surface, the flow F3 along the upper surface to the hot air return pipe, and from the opposite side surfaces to the central part along the bottom surface and collides with the central part. The flow becomes F2, and strong hot air is not directly blown to the workpiece, and the heating is as if it wraps the drying chamber 22 from the surroundings. In addition, the flow is complicated by the collision of air at the center of the bottom, and the hot air as a whole becomes hot air. By making the environment of the drying chamber 22 uniform without significantly impairing the drying promoting effect by spraying, the entire work can be dried uniformly.

図8は、前記実施の形態の変形例で熱風発生装置を一台のみで構成した熱風乾燥炉を示す正面模式図を示している。
熱風発生装置1を一台としたときは、一対ある熱風吹き出し管3のフランジ31(接続部)の数(本例においては、4か所)に応じた分岐を備えた送風通路5を設けて、熱風発生装置1の一か所の送風口14からの熱風を各々の熱風吐出口32に導入できるように配管される。一方、排気通路6に接続される熱風戻し管4のフランジ41(接続部)は、該管4の中間部などに一か所設ければ足り、1本の排気通路6で熱風発生装置1の吸引口15へと接続される。このように、熱風発生装置1の使用台数は装置の容量と、乾燥炉2との容量との関係から選択されれば良いが、一台とすることで構成が単純化でき、コストを下げることができる。
FIG. 8 shows a front schematic view showing a hot air drying furnace in which only one hot air generator is configured in a modified example of the above embodiment.
When the hot air generator 1 is used as one unit, a blower passage 5 having branches according to the number of flanges 31 (connection portions) of the pair of hot air blowout pipes 3 (4 locations in this example) is provided. , Hot air from one air outlet 14 of the hot air generator 1 is piped so that it can be introduced into each hot air discharge port 32. On the other hand, it is sufficient to provide one flange 41 (connection portion) of the hot air return pipe 4 connected to the exhaust passage 6 in an intermediate portion or the like of the pipe 4, and one exhaust passage 6 is used for the hot air generator 1. It is connected to the suction port 15. In this way, the number of hot air generators 1 to be used may be selected from the relationship between the capacity of the equipment and the capacity of the drying furnace 2, but the configuration can be simplified and the cost can be reduced by using one. Can be done.

図9~図12は、本発明の第二の実施の形態となるコンベアー炉タイプの熱風乾燥炉を示しており、図9がコンベアーの入口方向から見た全体構成の正面図で、図10がその側面図を示し、Aが配管を省略し、矢印で炉外部の熱風の流れを示した模式図、Bが、炉の本体部分を示している。尚、加熱区画域(炉の内部)での構成の理解が容易となるように、図面では外壁の一部を省略した炉の内部構成が記載される。 9 to 12 show a conveyor furnace type hot air drying furnace according to the second embodiment of the present invention, FIG. 9 is a front view of the entire configuration seen from the inlet direction of the conveyor, and FIG. 10 is a front view. A side view is shown, A is a schematic view showing the flow of hot air outside the furnace with an arrow, and B shows the main body of the furnace. In addition, in order to make it easy to understand the configuration in the heating section area (inside the furnace), the internal configuration of the furnace with a part of the outer wall omitted is described in the drawing.

本形態の熱風乾燥炉は、ワークを載置して移動するコンベアー8が、外壁210により囲繞された加熱区画域内(炉内)220を通過する間に、該ワークを熱風加熱により乾燥する乾燥炉であって、熱源として炉外部に備える熱風発生装置10と、炉内220のほぼ中央部にコンベアー8のコンベアーベルト81を貫通して、該コンベアーベルト81の搬送口となる入口230及び搬出口となる出口240を開口部とし、他の全周囲を外壁210で囲繞して加熱区画域を区画した乾燥炉本体20と、前記熱風発生装置10と乾燥炉本体20の炉内220とを接続する送風通路50及び排気通路60より構成した。 The hot air drying furnace of this embodiment is a drying furnace that dries the work by hot air heating while the conveyor 8 on which the work is placed and moves passes through the heating section area (inside the furnace) 220 surrounded by the outer wall 210. The hot air generator 10 provided outside the furnace as a heat source, and the inlet 230 and the carry-out port serving as the transport port of the conveyor belt 81 by penetrating the conveyor belt 81 of the conveyor 8 substantially in the center of the furnace 220. An outlet 240 is used as an opening, and the entire periphery of the drying furnace body 20 is surrounded by an outer wall 210 to partition a heating section area, and a blower connecting the hot air generator 10 and the inside 220 of the drying furnace body 20. It was composed of a passage 50 and an exhaust passage 60.

そして、乾燥炉本体20の炉内220には、該炉内への熱風の供給部となる、炉内底面近傍の対向する側面に沿って、前記コンベアーベルト81より下方に位置する、炉内前方(入口側)から後方(出口側)に亘りほぼいっぱいの長さで設けられる長尺管状の左右一対の下部熱風吹き出し管30aと、炉内上面近傍の対向する側面に沿って、コンベアーベルト81より上方に位置する、前記下部熱風吹き出し管30aと同様の長さで平行するように設ける長尺管状の左右一対の上部熱風吹き出し管30bと、炉内からのエアーの排出部となる、炉内220の底面、及び、上面の長さ方向中央部に沿って、前記熱風吹き出し管30と同様の長さで平行する様に設ける長尺管状の下部熱風戻し管40a、及び、上部熱風戻し管40bを設けており、前記第一の形態と同様に、熱風乾燥装置10の送風口140と熱風吹き出し管30の両端側に設けられたフランジ310が送風通路50により接続され、一方、熱風戻し管40に複数設けられるフランジ410(本例では4つ)と熱風発生装置10の吸引口150が排気通路60により接続されており、熱風発生装置10と炉内220で熱風循環加熱する構成としている。尚、前記第一の形態と同様に温度センサーや制御装置等は公知の装置が設けられている。 Then, the inside 220 of the drying furnace main body 20 is located in front of the inside of the furnace, which is located below the conveyor belt 81 along the opposite side surface near the bottom surface of the inside of the furnace, which is a supply portion of hot air into the inside of the furnace. From the conveyor belt 81 along the opposite side surface near the upper surface of the furnace, a pair of left and right lower hot air blowout pipes 30a, which are long tubular and are provided from the (inlet side) to the rear (exit side) with almost the full length. A pair of left and right upper hot air blowout pipes 30b, which are long tubular and provided so as to be parallel to the lower hot air blowout pipe 30a located above, and an inside 220 which serves as an air discharge part from the inside of the furnace. A long tubular lower hot air return pipe 40a and an upper hot air return pipe 40b provided so as to be parallel to the hot air blowout pipe 30 along the bottom surface and the central portion in the length direction of the upper surface. Similar to the first embodiment, the blower port 140 of the hot air drying device 10 and the flanges 310 provided on both ends of the hot air blowout pipe 30 are connected by the blower passage 50, while the hot air return pipe 40 is provided. A plurality of flanges 410 (four in this example) and suction ports 150 of the hot air generator 10 are connected by an exhaust passage 60, and the hot air generator 10 and the furnace 220 are configured to circulate and heat hot air. As in the first embodiment, a known device is provided for the temperature sensor, the control device, and the like.

本形態における熱風発生装置10は、前記第一の形態と同様のものを同様に用いれば良いが、本形態では、同一の熱風発生装置2台(10a、10b)が用いられ、一方の装置10aが炉内220の下部熱風吹き出し管30aと送風通路50aを介して装置10aの送風口140aと、また、下部熱風戻し管40aと排気通路60aを介して装置10aの吸引口150aと接続され、他方の装置10bが上部吹き出し管30bと送風通路50bを介して送風口140bと、また、上部熱風戻し管40bと排気通路60bを介して装置10bの吸引口150bに接続されている。 As the hot air generator 10 in the present embodiment, the same one as in the first embodiment may be used in the same manner, but in the present embodiment, the same two hot air generators (10a, 10b) are used, and one of the hot air generators 10a is used. Is connected to the air outlet 140a of the device 10a via the lower hot air blowing pipe 30a and the air passage 50a in the furnace 220, and to the suction port 150a of the device 10a via the lower hot air return pipe 40a and the exhaust passage 60a. The device 10b is connected to the air outlet 140b via the upper blow pipe 30b and the air passage 50b, and to the suction port 150b of the device 10b via the upper hot air return pipe 40b and the exhaust passage 60b.

乾燥炉本体2は、前記した様にコンベアーベルト81が通過する入口230と出口240を除いた周囲全体を、断熱材を含んだ外壁210で覆った箱形に形成され、その内側が加熱区画域(炉内)220とされる。尚、前記入口230、240となる開口部はワークを載置したコンベアーベルト81が通過可能な範囲でなるべく小さく形成すると炉内の熱の外部への放出を抑えることができる。そして、この炉内220の中央付近を貫通して通過するようにワークを載置するコンベアーベルト81を配置し、炉外部に延設させた両端に該コンベアーベルト81を駆動するプーリー82を備えて形成した。尚、本例のコンベアー8は、最も簡単な構成を例示したもので、ワークを載せて炉内220を搬送できるものであれば、ベルトを用いるものに限らず、例えばローラーコンベアー等どの様な形態のコンベアーを用いても良い。 As described above, the drying furnace main body 2 is formed in a box shape in which the entire circumference excluding the inlet 230 and the outlet 240 through which the conveyor belt 81 passes is covered with an outer wall 210 containing a heat insulating material, and the inside thereof is a heating compartment area. (Inside the furnace) 220. If the openings serving as the inlets 230 and 240 are formed as small as possible within the range through which the conveyor belt 81 on which the work is placed can pass, it is possible to suppress the release of heat in the furnace to the outside. Then, a conveyor belt 81 on which the work is placed is arranged so as to pass through the vicinity of the center of the furnace 220, and pulleys 82 for driving the conveyor belt 81 are provided at both ends extending outside the furnace. Formed. The conveyor 8 of this example exemplifies the simplest configuration, and is not limited to the one using a belt as long as it can carry a work and convey the 220 in the furnace, for example, any form such as a roller conveyor. You may use the conveyor of.

図11は、本形態の熱風吹き出し管を示し、Aが下部熱風吹き出し管、Bが上部吹き出し管を示している。
本形態の熱風吹き出し管30は、前記第一の形態の熱風吹き出し管3と同様に両端部を閉塞したステンレス等からなる長尺中空の管状体として形成され、炉内220の底面近傍の側面に沿って配置される下部熱風吹き出し管30aには、配置されたさいに炉の上面、及び、対向面側となる側面に沿って、適当な間隔で複数並べて配置した熱風の吐出口となる熱風吹き出し口320a(上面側)、320b(側面側)を孔として設け、一方、上面近傍の側面に沿って配置される上部吹き出し管30bには、配置されたさいに炉の対向面側となる側面に沿って、同様に適当な間隔で複数並べた熱風吹き出し口320cを孔として設けるが、本例においては、上部熱風吹き出し管30bの熱風吹き出し口320cを上面と平行する方向よりやや上面側に傾ける方向に設定した。
FIG. 11 shows the hot air blowing pipe of this embodiment, where A is a lower hot air blowing pipe and B is an upper blowing pipe.
The hot air blowing pipe 30 of the present embodiment is formed as a long hollow tubular body made of stainless steel or the like with both ends closed like the hot air blowing pipe 3 of the first embodiment, and is formed on a side surface near the bottom surface of the furnace 220. In the lower hot air blowing pipe 30a arranged along the hot air blowing pipe, a plurality of hot air blowing ports arranged side by side at appropriate intervals along the upper surface of the furnace and the side surface facing the facing surface are blown out. Ports 320a (upper surface side) and 320b (side surface side) are provided as holes, while the upper blowout pipe 30b arranged along the side surface near the upper surface is provided on the side surface facing the furnace when arranged. Along the same way, a plurality of hot air outlets 320c arranged at appropriate intervals are provided as holes, but in this example, the direction in which the hot air outlet 320c of the upper hot air outlet pipe 30b is slightly tilted toward the upper surface side from the direction parallel to the upper surface. Set to.

熱風吹き出し口320を前記のような位置に設定することにより、下部吹き出し管30aに導入される熱風は、炉内220の上方、及び、底面に平行する方向に吐出され、上部吹き出し管30bに導入された熱風は、上面に平行するよりやや上方に向けて吐出される。(図12参照)ここで、上部吹き出し管30bからの熱風の吐出をやや上方に向けることで、コンベアーベルト81上に載置されるワークに強い熱風が直接吹き付けることを防止している。尚、本例においては、送風通路50との接続部で熱風発生装置10からの熱風の導入口となるフランジ310は、熱風吹き出し管30の両端部に、底面及び上面に沿う熱風吹き出し口320b、320cの裏側となる面に設けている。 By setting the hot air outlet 320 at the position as described above, the hot air introduced into the lower outlet pipe 30a is discharged above the furnace 220 and in the direction parallel to the bottom surface and introduced into the upper outlet pipe 30b. The generated hot air is discharged slightly upward from parallel to the upper surface. (See FIG. 12) Here, by directing the discharge of hot air from the upper blowout pipe 30b slightly upward, it is possible to prevent strong hot air from directly blowing onto the work placed on the conveyor belt 81. In this example, the flange 310, which is a connection portion with the blower passage 50 and serves as an introduction port for hot air from the hot air generator 10, has hot air outlets 320b along the bottom surface and the upper surface at both ends of the hot air outlet pipe 30. It is provided on the back surface of the 320c.

熱風戻し管40についても、前記第一の形態の熱風戻し管4と同様に長尺中空の管状体として形成されるが、本形態においては、炉内220上面中央部に設ける熱風戻し管40aのみではなく、底面中央部にも同形態の熱風戻し管40bを備えており、各々の戻し管40の側面両側には炉内220からの使用済みエアーの排出口となるエアー排気口420a(底面側)、420b(上面側)を複数並んだ孔として設けている。尚、該熱風戻し管40の排気通路60との接続部となるフランジ410等は前記第一の形態の熱風乾燥炉と同様であって良い。(図5参照) The hot air return pipe 40 is also formed as a long hollow tubular body like the hot air return pipe 4 of the first form, but in this embodiment, only the hot air return pipe 40a provided in the center of the upper surface of the furnace 220 is provided. Instead, a hot air return pipe 40b of the same form is also provided in the center of the bottom surface, and air exhaust ports 420a (bottom side) that serve as outlets for used air from the furnace 220 are provided on both sides of each return pipe 40. ), 420b (upper surface side) are provided as a plurality of arranged holes. The flange 410 or the like that serves as a connection portion of the hot air return pipe 40 with the exhaust passage 60 may be the same as that of the hot air drying furnace of the first aspect. (See Fig. 5)

送風通路50と排気通路60についても、前記第一の形態の送風通路5、排気通路6と同様に熱風発生装置10と、熱風吹き出し管30及び熱風戻し管40を接続して形成されれば良いか、本例においては、前記の通り熱風発生装置が2台用いられ、一方の熱風発生装置10aは下部熱風吹き出し管30a及び下部熱風戻し管40に、他方の熱風発生装置10bは上部熱風吹き出し管30b及び上部熱風戻し管40bにそれぞれ送風通路50及び排気通路60を介して接続されている。 The blower passage 50 and the exhaust passage 60 may also be formed by connecting the hot air generator 10, the hot air blowout pipe 30, and the hot air return pipe 40 in the same manner as in the blower passage 5 and the exhaust passage 6 of the first aspect. Or, in this example, as described above, two hot air generators are used, one of the hot air generators 10a is the lower hot air blowing pipe 30a and the lower hot air return pipe 40, and the other hot air generator 10b is the upper hot air blowing pipe. It is connected to 30b and the upper hot air return pipe 40b via an air passage 50 and an exhaust passage 60, respectively.

以上より、熱風発生装置10と炉内220との配管及び熱風の流れをまとめると、第一の熱風発生装置10aの送風口140aから吐出される熱風は、4つに分岐される第一の送風通路50aを通って、炉内220の底面近傍の両側面に沿って対向する下部熱風吹き出し管30aの各々の入口側(コンベア8の搬入側230)、出口側(コンベア8の搬出側240)のフランジ310に導入され、熱風吹き出し口320aから炉内上方に向け、また、熱風吹き出し管320bから炉内底面に沿う方向に吐出される。一方、第二の熱風発生措置10bの送風口140bから吐出される熱風は、4つに分岐される第二の送風通路50bを通って、炉内220の上面近傍の両側面に沿って対向する上部熱風吹き出し管30bの各々の入口側、出口側のフランジ310に導入され、熱風吹き出し口320cから炉内220のやや上面方向に向け上面に沿う方向に吐出される。また、炉内220のエアーは、底面側の熱風戻し管40aのエアー排気口420a、及び、上面側の熱風戻し管40bのエアー排気口420bから熱風戻し管60a(底部側)60b(上面側)を通って、各々第一の熱風発生装置10aの吸引口150a、第二の熱風発生装置10bの吸引口150bへ戻されて循環される。尚、熱風吹き出し管30、熱風戻し管40の配置や熱風発生装置10の数などは炉の大きさや、ワークにより適当に設定されれば良い。 From the above, when the piping between the hot air generator 10 and the furnace 220 and the flow of hot air are summarized, the hot air discharged from the air outlet 140a of the first hot air generator 10a is the first air blown into four branches. On the inlet side (carry-in side 230 of the conveyor 8) and the outlet side (carry-out side 240 of the conveyor 8) of the lower hot air blowing pipes 30a facing each other along both side surfaces near the bottom surface of the furnace 220 through the passage 50a. It is introduced into the flange 310 and is discharged upward from the hot air outlet 320a in the furnace and from the hot air outlet pipe 320b in the direction along the bottom surface of the furnace. On the other hand, the hot air discharged from the air outlet 140b of the second hot air generating measure 10b passes through the second air passage 50b branched into four and faces each other along both side surfaces near the upper surface of the furnace 220. It is introduced into the flanges 310 on the inlet side and the outlet side of each of the upper hot air blowing pipes 30b, and is discharged from the hot air blowing port 320c toward the slightly upper surface of the furnace 220 in the direction along the upper surface. Further, the air in the furnace 220 is supplied from the air exhaust port 420a of the hot air return pipe 40a on the bottom surface side and the air exhaust port 420b of the hot air return pipe 40b on the upper surface side to the hot air return pipe 60a (bottom side) 60b (top surface side). Through, they are returned to the suction port 150a of the first hot air generator 10a and the suction port 150b of the second hot air generator 10b, respectively, and circulated. The arrangement of the hot air blowout pipe 30, the hot air return pipe 40, the number of hot air generators 10, and the like may be appropriately set according to the size of the furnace and the work.

図12は、本形態の炉内での主要な熱風の流れを示している。
本形態の熱風乾燥炉では、熱風吹き出し管30が炉内220の底部、及び、上部の対向する両側面に一対ずつ、熱風戻し管40が炉内220の底面及び上面の長さ方向中央部に沿って設置されており、下部熱風吹き出し管30aの熱風吹き出し口320が上面320a及び対向する側面320bに配置されていることから、該熱風吹き出し管30aに導入された熱風は、炉内220の上方F10、及び、底面に沿う方向F20に吹出され、また、上部熱風吹き出し管30bの熱風吹き出し口320cは対向する側面よりやや上方に向け配置されることから、該熱風吹き出し管30bに導入された熱風は、炉内のやや上面に向かい沿う方向F30に吹出されており、炉内220での大きなエアーの流れは、対向する底部側面から側面に沿って上方に向かう流れF10、両側面から底面に沿って中央部の熱風戻し管40aに向かう流れF20、及び、対向する上部側面から上面に沿って中央部の熱風戻し管40bに向かう流れF30となり、コンベアーベルト81に載置されたワークには直接吹き付けられずに、該ワークの周囲を囲んで、あたかも炉内220を包み込むような加熱となっている。また、両側面からの中央部に向かうエアーのぶつかりにより流れが複雑化されることも併せて、全体として熱風の吹付による乾燥促進効果を大きく損なうことなく、炉内環境が均一化されることにより、ワーク全体を均一に乾燥することができるものとなっている。
FIG. 12 shows the main flow of hot air in the furnace of this embodiment.
In the hot air drying furnace of this embodiment, a pair of hot air blowing pipes 30 are placed on the bottom of the furnace 220 and two facing surfaces of the upper portion, and a pair of hot air returning pipes 40 are placed on the bottom surface and the upper surface of the furnace 220 in the lengthwise direction. Since the hot air outlet 320 of the lower hot air outlet pipe 30a is arranged along the upper surface 320a and the opposite side surface 320b, the hot air introduced into the hot air outlet pipe 30a is above the furnace 220. Since the hot air outlet 320c of the upper hot air outlet pipe 30b is arranged slightly upward from the opposite side surface, the hot air is blown out in the direction F20 along the bottom surface of the F10 and the hot air outlet pipe 30b. Is blown out in the direction F30 slightly toward the upper surface in the furnace, and the large air flow in the furnace 220 is from the opposite bottom side surface to the upward flow F10 along the side surface, from both side surfaces to the bottom surface. The flow F20 is directed toward the hot air return pipe 40a in the central portion, and the flow F30 is directed toward the hot air return pipe 40b in the central portion along the upper surface from the opposite upper side surface. Instead, the work is heated so as to surround the work and wrap the inside of the furnace 220. In addition, the flow is complicated by the collision of air from both sides toward the center, and the drying promotion effect due to the blowing of hot air is not significantly impaired as a whole, and the environment inside the furnace is made uniform. , The entire work can be dried uniformly.

1.10. 熱風発生装置
11. モーター
12. 送風機
13. ヒーター
14.140. 送風口
15.150. 吸引口
16. フレッシュエアー取り入れ口
2.20. 乾燥炉
21.210. 外壁
22.220. 乾燥室
23. 扉
3.30. 熱風吹き出し管
31.310. フランジ(接続部)
32.320. 熱風吹出し口
4.40. 熱風戻し管
41.410. フランジ(接続部)
5.50. 送風通路
51. 接続部
6.60. 排気通路
7. 台車
71. 棚
8. コンベアー
81. コンベアーベルト
82. プーリー
1.10. Hot air generator 11. Motor 12. Blower 13. Heater 14.140. Blower 15.150. Suction port 16. Fresh air intake 2.20. Drying furnace 21.210. Outer wall 22.220. Drying room 23. Door 3.30. Hot air blowout tube 31.310. Flange (connection part)
32.320. Hot air outlet 4.40. Hot air return pipe 41.410. Flange (connection part)
5.50. Blower passage 51. Connection part 6.60. Exhaust passage 7. Bogie 71. Shelf 8. Conveyor 81. Conveyor belt 82. pulley

Claims (5)

加熱区画域に熱風を導入して被加熱ワークを乾燥する乾燥炉において、区画域外に配置する熱風乾燥装置と、区画域内(乾燥炉内)の底面近傍の対面する側面に沿って対向して設けられ、前方から後方に亘り列を形成して配置される熱風の吐出口を含む熱風吹き出し部と、該熱風吹き出し部の両端近傍位に接続され、熱風発生装置からの加熱エアーを導入する熱風供給通路と、乾燥炉内から外部へのエアーの排気部となる上面中央部に前記熱風吹き出し部と平行に設けられ、前方から後方に亘り列を形成して配置される熱風の排出口を含む熱風戻し口、及び、排気通路を備えて構成し、前記吐出口を、熱風吹き出し部を乾燥炉内に設定したさいの炉の側面に沿って上方に向く上面、及び、炉の底面沿って対向側面に向く側面に設け、前記熱風吹き出し部の吐出口から吹き出す熱風の吐出方向が、直接ワークに向かわず、乾燥炉内の壁面の側面から上面及び底面に沿って平行か、あるいは、僅かに壁面に向けほぼ平行方向に設定されることを特徴とする熱風乾燥炉。 In a drying furnace that introduces hot air into the heating area to dry the work to be heated, the hot air drying device placed outside the area is provided facing each other along the facing side surfaces near the bottom surface in the area (inside the drying oven). A hot air blowing part including a hot air discharge port arranged in a row from the front to the rear, and a hot air supply that is connected to the vicinity of both ends of the hot air blowing part and introduces heated air from the hot air generator. Hot air including a hot air outlet that is provided in parallel with the hot air blowing part in the passage and the center of the upper surface that serves as an air exhaust part from the inside of the drying furnace to the outside and is arranged in a row from the front to the rear. It is configured to have a return port and an exhaust passage, and the discharge port is an upper surface facing upward along the side surface of the furnace when the hot air blowing portion is set in the drying furnace, and a facing side surface along the bottom surface of the furnace. The hot air blown out from the discharge port of the hot air blowing part is provided on the side surface facing the furnace, and the discharge direction of the hot air is not directly directed to the work, and is parallel to the upper surface and the bottom surface from the side surface of the wall surface in the drying furnace, or slightly on the wall surface. A hot air drying furnace characterized by being set in almost parallel directions. 前記熱風吹き出し部は、前記底面近傍の対面する側面に沿って対向して設けられるのに加え、乾燥炉内の上面近傍の対面する側面に沿って対向しても設けられ、該上面近傍に設ける熱風吹き出し部は、吐出口を、熱風吹き出し部を乾燥炉内に設定したさいの炉の上面に沿って対向側面に向く側面にのみ設ける請求項1の熱風乾燥炉。 The hot air blowing portion is provided not only along the facing side surface near the bottom surface but also facing along the facing side surface near the upper surface in the drying furnace, and is provided near the upper surface. The hot air drying furnace according to claim 1, wherein the hot air blowing portion is provided only on the side surface facing the opposite side surface along the upper surface of the furnace when the hot air blowing portion is set in the drying furnace. 前記熱風戻し口は、前記乾燥炉内の上面中央部に設けられるのに加え、底面中央部にも設けられる請求項1乃至2のいずれかの熱風乾燥炉。 The hot air drying furnace according to any one of claims 1 to 2, wherein the hot air return port is provided in the central portion of the upper surface in the drying furnace and also in the central portion of the bottom surface. 乾燥炉は、被加熱ワークを載置したコンベアーが区画域内(乾燥炉内)を通過する間にワークを熱風乾燥するコンベアー炉であって、ワークの搬送口となる入口及び搬出口となる出口の開口部を除き、全周囲を外壁で囲繞し乾燥炉内を形成し、該乾燥炉内のほぼ中央部にコンベアーベルトを貫通して備える請求項1乃至3のいずれかの熱風乾燥炉。 The drying furnace is a conveyor furnace that dries the work with hot air while the conveyor on which the work to be heated passes through the compartment (inside the drying furnace). The hot air drying furnace according to any one of claims 1 to 3, wherein the inside of the drying furnace is formed by surrounding the entire circumference with an outer wall except for the opening, and the conveyor belt is provided in a substantially central portion of the drying furnace. 前記コンベアー炉の底面近傍部の対面する側面に沿って対向して設ける熱風吹き出し部は、該コンベアー炉のコンベアーベルトより下方に位置させ、上面近傍部の対面する側面に沿って対向して設ける熱風吹き出し部は、コンベアーベルトより上方に位置させてなる 請求項4の熱風乾燥炉。 The hot air blowing portion provided facing the facing side surface of the bottom surface portion of the conveyor furnace is located below the conveyor belt of the conveyor furnace, and is provided facing the facing side surface of the top surface vicinity portion. The hot air drying furnace according to claim 4, wherein the blowing portion is located above the conveyor belt.
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JP2013217545A (en) 2012-04-06 2013-10-24 Midas Co Ltd Device for drying fruit
JP2013215118A (en) 2012-04-06 2013-10-24 Midas Co Ltd Method of producing dried persimmon

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