JPH0765844B2

JPH0765844B2 - Microwave dryer

Info

Publication number: JPH0765844B2
Application number: JP1292804A
Authority: JP
Inventors: 昌治高島; 喜代光黒田; 和之山田
Original assignee: Sanyo Electric Co Ltd
Current assignee: Sanyo Electric Co Ltd
Priority date: 1989-11-10
Filing date: 1989-11-10
Publication date: 1995-07-19
Anticipated expiration: 2010-07-19
Also published as: JPH03156280A

Description

【発明の詳細な説明】（イ）産業上の利用分野本発明はマイクロ波乾燥装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a microwave dryer.

（ロ）従来の技術従来は、実公平１−21518号公報に示されているように
攪拌翼を回転させながら、加熱室内に供給された被乾燥
物にマイクロ波を照射して乾燥させていた。(B) Prior Art Conventionally, as shown in Japanese Utility Model Publication No. 1-21518, while rotating the stirring blade, the material to be dried supplied to the heating chamber was irradiated with microwaves to be dried. .

（ハ）発明が解決しようとする問題点従来の技術にあっては、樹脂ペレット、米、薬品粉粒物
等の被乾燥物を乾燥する際、この被乾燥物が攪拌翼と加
熱室内の壁との隙間に入り込んだときのことが何ら考慮
されていないので、もし攪拌翼の回転中に入り込んだ場
合、攪拌翼がスムーズに回転しなくなり、回転を止めて
しまう恐れがある。(C) Problems to be Solved by the Invention In the prior art, when drying a material to be dried such as resin pellets, rice, and chemical powder, the material to be dried is the stirring blade and the wall inside the heating chamber. Since no consideration is given to when the stirring blade enters the gap between the stirring blade and the stirring blade, if the stirring blade enters during the rotation, the stirring blade may not rotate smoothly and may stop rotating.

本発明は、斯る問題点に鑑み、解決するものである。The present invention has been made in view of these problems and solves them.

（ニ）課題を解決するための手段本発明のマイクロ波乾燥装置は、粉状または粉状被乾燥
物が供給される乾燥室と、該乾燥室に上記被乾燥物をマ
イクロ波乾燥するためのマイクロ波供給手段と、上記乾
燥室内に配置されて上記被乾燥物を攪拌する攪拌手段
と、該攪拌手段を回転軸に取り付けて回転駆動させる駆
動手段を備えたものにおいて、上記攪拌手段の回転中
で、且つ上記攪拌手段と上記加熱室の壁面との間に上記
被乾燥物が挾まったときに、上記波乾燥物自身によって
上記攪拌手段を上方に押し上げ、また上記被乾燥物を乗
り越えたときに上記攪拌手段の自重により押し上げられ
る前の位置まで下降するように上記攪拌手段と上記回転
軸とを遊嵌する軸継手を上記攪拌手段と上記回転軸との
間に介装した構成である。(D) Means for Solving the Problems A microwave drying apparatus of the present invention is a drying chamber to which a powdery or powdery material to be dried is supplied, and a microwave oven for drying the material to be dried in the drying chamber. A microwave supply means, a stirring means arranged in the drying chamber for stirring the material to be dried, and a driving means for rotating the stirring means by attaching the stirring means to a rotating shaft, wherein the stirring means is rotating. And when the material to be dried is sandwiched between the stirring means and the wall surface of the heating chamber, when the wave dried material itself pushes the stirring means upward, and when the material to be dried is overcome. In addition, a shaft coupling that loosely fits the stirring means and the rotary shaft so as to descend to a position before being pushed up by the own weight of the stirring means is interposed between the stirring means and the rotary shaft.

（ホ）作用攪拌翼で被乾燥物を攪拌しながら乾燥しているときに、
乾燥室内壁と攪拌翼との間に被乾燥物が入り込んでも攪
拌翼が上下に動き、被乾燥物に引っ掛からず、スムーズ
に回転するものである。(E) Action When the material to be dried is being dried by stirring with a stirring blade,
Even if the material to be dried enters between the inner wall of the drying chamber and the stirring blade, the stirring blade moves up and down and does not catch on the material to be dried, and rotates smoothly.

（ヘ）実施例本発明のマイクロ波乾燥装置（１）を、第１図に基づい
て説明すると、貯槽（６）内に貯溜されている樹脂ペレ
ット、米、薬品粉粒物などの被乾燥物（７）は、吸引ブ
ロワ（５）の駆動により、ポペット弁（８）を介して、
ブロワ（５）の吸引作用により供給パイプ（４）から円
筒状乾燥室（２）内に、レベルセンサー（20）で一定値
を検知するまで供給される。そして、攪拌手段となる攪
拌翼（３）を回しながら、マグネトロン（９）からマイ
クロ波を、導波管（10）を介して乾燥室（２）内に照射
し、サーミスタ（21）で被乾燥物（７）の温度を検知し
て温度制御し、被乾燥物（７）を乾燥させる。その後、
ピストン型排出弁（11）を開き、排出パイプ（12）を介
して予備室（13）に排出し、成形機への排出を待機する
ものである。(F) Example The microwave drying apparatus (1) of the present invention will be described with reference to FIG. 1. The dried objects such as resin pellets, rice and chemical powder granules stored in the storage tank (6). (7) is driven by the suction blower (5), through the poppet valve (8),
It is supplied from the supply pipe (4) into the cylindrical drying chamber (2) by the suction action of the blower (5) until a constant value is detected by the level sensor (20). Then, while rotating the stirring blade (3) as a stirring means, the microwave is radiated from the magnetron (9) into the drying chamber (2) through the waveguide (10), and is dried by the thermistor (21). The temperature of the article (7) is detected and the temperature is controlled to dry the article (7) to be dried. afterwards,
The piston type discharge valve (11) is opened, the piston type discharge valve (11) is discharged to the preliminary chamber (13) through the discharge pipe (12), and the discharge to the molding machine is awaited.

次に、本発明の要旨部の構成を第２図、第３図及び第４
図に基づいて説明する。攪拌翼（３）を固着した軸（1
4）は乾燥室（２）の底面の略中央の貫通穴から下方に
突出され、乾燥室（２）の外底面に固着した軸受（15）
にて回転並びに上下動自在に枢着され、さらに軸（14）
下端は継手ケース（17）内に挿入されている。Next, the structure of the gist of the present invention will be described with reference to FIGS. 2, 3, and 4.
It will be described with reference to the drawings. Shaft with fixed stirring blade (3) (1
4) The bearing (15) which protrudes downward from the through hole in the center of the bottom surface of the drying chamber (2) and is fixed to the outer bottom surface of the drying chamber (2).
Is pivotally attached to rotate and move up and down, and further the shaft (14)
The lower end is inserted into the joint case (17).

継手ケース（17）内において、駆動源となる電動機（1
6）の回転軸（22）が挿入され、この回転軸（22）には
軸継手（23）が固着されている。この軸継手（23）は前
記攪拌翼（３）の軸（14）が挿入される縦穴（24）とこ
の縦穴（24）に周側から達する左右の一対の縦方向スリ
ット（18）が設けられている。In the joint case (17), the electric motor (1
The rotary shaft (22) of 6) is inserted, and the shaft joint (23) is fixed to the rotary shaft (22). The shaft joint (23) is provided with a vertical hole (24) into which the shaft (14) of the stirring blade (3) is inserted, and a pair of left and right vertical slits (18) reaching the vertical hole (24) from the circumferential side. ing.

そして、攪拌翼の軸（14）は、この軸継手（23）の縦穴
（24）に挿入され、その状態でスリット（18）と、軸
（14）の穴（25）にピン（19）を貫通させて軸継手（2
3）と軸（14）を連結し電動機（16）の回転力が攪拌翼
（３）に伝達される。しかも軸（14）を軸受けに対して
上下動可能にし、スリット（18）を貫通したピン（19）
により軸（14）と継手ケース（23）に連結したので、軸
（14）はピン（19）がスリット（18）の上下幅の動作範
囲内で上下移動可能となる。Then, the shaft (14) of the stirring blade is inserted into the vertical hole (24) of the shaft coupling (23), and in that state, the slit (18) and the pin (19) are inserted into the hole (25) of the shaft (14). Penetrate through shaft coupling (2
3) and the shaft (14) are connected, and the rotational force of the electric motor (16) is transmitted to the stirring blade (3). Moreover, the shaft (14) can be moved up and down with respect to the bearing, and the pin (19) penetrates the slit (18).
Since the shaft (14) and the joint case (23) are connected to each other, the pin (19) of the shaft (14) can move up and down within the operating range of the vertical width of the slit (18).

さて、この動作を以下に説明する。Now, this operation will be described below.

被乾燥物（７）が乾燥室（２）内に供給される前の攪拌
翼（３）は自重により第２図のように下方に位置してい
る。この状態で、攪拌翼（３）を回転させながら被乾燥
物（７）を供給する。これは、被乾燥物（７）が片寄ら
ずに、平坦に堆積させるためである。この時、排出弁
（11）は閉じられている。そして、一定量の被乾燥物
（７）が供給されれば、マイクロ波を照射し乾燥を開始
するものである。この乾燥のときにも攪拌翼（３）を回
転させて、底近くの被乾燥物（７）から発生する水分を
上昇させたり、被乾燥物（７）への加熱むらを改善し万
遍なく乾燥されるようにしている。この供給時や乾燥時
に、回転している攪拌翼（３）と乾燥室（２）の内壁と
の隙間に被乾燥物（７）が挟まれたとき、この被乾燥物
（７）の上に攪拌翼（３）が乗り上げ、乗り越えられる
ようになり、攪拌翼（３）は回転しながら第３図の様に
上方向に動き、被乾燥物（７）を乗り越える。そして、
攪拌翼（３）の自重により、被乾燥物（７）を押し退け
ながら第２図の状態に戻り回転を続ける。The agitating blade (3) before the material to be dried (7) is supplied into the drying chamber (2) is located below as shown in FIG. 2 due to its own weight. In this state, the material to be dried (7) is supplied while rotating the stirring blade (3). This is because the material to be dried (7) is deposited evenly without being offset. At this time, the discharge valve (11) is closed. When a certain amount of the material to be dried (7) is supplied, microwaves are irradiated to start drying. Even during this drying, the stirring blade (3) is rotated to increase the moisture generated from the material to be dried (7) near the bottom and to improve uneven heating of the material to be dried (7). I am trying to dry it. When the material to be dried (7) is sandwiched in the gap between the rotating stirring blade (3) and the inner wall of the drying chamber (2) during the supply or the drying, the material to be dried (7) is placed on the material to be dried (7). The stirring blade (3) rides up and can be overcome, and the stirring blade (3) moves upward as shown in FIG. 3 while rotating, and gets over the material to be dried (7). And
Due to the weight of the stirring blade (3), the object to be dried (7) is pushed away and returned to the state of FIG. 2 to continue rotation.

以上の如く、攪拌翼（３）が上下できるので回転がスム
ーズとなり、装置の故障率低下にも貢献することにな
る。As described above, since the stirring blade (3) can be moved up and down, the rotation becomes smooth, which contributes to the reduction of the failure rate of the device.

尚、乾燥室（２）内の清掃の時は、攪拌翼（３）をつま
み上げて掃除ができるので、被乾燥物（７）が清掃後乾
燥室（２）内に残ることなくきれいに掃除できる。When cleaning the inside of the drying chamber (2), the stirring blade (3) can be picked up and cleaned, so that the material to be dried (7) does not remain in the drying chamber (2) after cleaning and can be cleaned cleanly. .

（ト）効果本発明を実施することにより、攪拌翼が被乾燥物に引っ
掛かって回転が止まることがなくなるので、装置の信頼
性が向上する。(G) Effect By carrying out the present invention, the stirring blade is not caught by the material to be dried and stops rotating, so that the reliability of the apparatus is improved.

[Brief description of drawings]

図面は本発明実施例のマイクロ波乾燥装置に係り、第１
図は断面図、第２図は攪拌翼が通常の位置にある時の拡
大断面図、第３図は攪拌翼が上方に動いた時の拡大断面
図、第４図は攪拌翼の軸付近の分解斜視図である。（１）……マイクロ波乾燥装置本体、（２）……乾燥
室、（３）……攪拌翼、（14）……軸、（15）……軸受
部、（16）……電動機、（17）……軸ケース、（18）…
…スリット、（19）……ピン、（23）……軸継手。The drawings relate to a microwave drying apparatus according to an embodiment of the present invention.
The figure is a cross-sectional view, FIG. 2 is an enlarged cross-sectional view when the stirring blade is in a normal position, FIG. 3 is an enlarged sectional view when the stirring blade moves upward, and FIG. It is an exploded perspective view. (1) …… Microwave dryer main body, (2) …… drying chamber, (3) …… stirring blade, (14) …… shaft, (15) …… bearing part, (16) …… motor, ( 17) …… Axis case, (18)…
… Slits, (19) …… pins, (23) …… shaft joints.

Claims

[Claims]

1. A drying chamber to which a powdery or powdery material to be dried is supplied, a microwave supply means for microwave-drying the material to be dried in the drying chamber, and the drying chamber arranged in the drying chamber. What is provided with a stirring means for stirring the material to be dried and a driving means for rotating the stirring means by mounting the stirring means on a rotating shaft, and while the stirring means is rotating and the stirring means and the wall surface of the heating chamber When the object to be dried is sandwiched in the meantime, the object to be dried pushes up the stirring means upward, and when the object to be dried is overcome, the stirring means descends to a position before being pushed up by its own weight. As described above, the microwave drying device is characterized in that a shaft coupling that loosely fits the stirring means and the rotary shaft is interposed between the stirring means and the rotary shaft.