JP2000314398A - Air blower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To connect the suction side and the delivery side of a duct with a straight line by housing a centrifugal air blower in a duct shaped outer plate having the same size as a duct decided by a volume of air, and disposing a motor in the duct via a vibration isolating rubber, and arranging partition plates on the delivery side and a suction side surfaces. SOLUTION: A scroll chamber 15, whose vertical dimension coincides with the vertical dimension of an outer plate 14 and having a thickness of half of the horizontal dimension is constituted by a sheet metal parts, in a steel plate made outer plate 14 of a duct shaped air blower. A motor 19, fixed to a motor attaching plate 18 via four vibration isolating rubbers 17, is attached to the side surface of the scroll chamber 15 around a suction bell mouth 16. In the scroll chamber 15, an impeller 20 is connected directly to a shaft of a motor 19. A lower partition plate 21, a side partition plate 22, and an inclining plate 24 for reducing a resistance of a suction side are attached, while being brought into contact with a delivery port 23 of the scroll chamber 15. Since it is impossible to obtain necessary rotating speed with a commercial frequency, an inverter is disposed on a part where is not an air passage in the duct, and rotating speed is regulated.

Description

【発明の詳細な説明】 【０００１】 【産業上の利用分野】この発明は空調用、換気用などに
ダクトを接続して使用される遠心式送風機の改良に関す
るものである。 【０００２】 【従来の技術】従来、遠心式送風機は吸込口と吐出口は
その構造上の特徴によって９０°方向が異なっていてし
かも芯がずれているものが多く、吸込口と吐出口におけ
る空気速度が通常ダクトで使用される速度より可成り早
い場合が多く、また振動体として扱われるものが多かっ
た。 【０００３】 【発明が解決しようとする問題点】そのためダクトに接
続する場合にダクトの向きが変わってしまう点、芯がず
れてしまう点についてはエルボや変形ダクトを作成し、
空気速度を変更するためには漸大管を作成し、防振のた
めには防振キャンバス継ぎ手を用いる必要があり、送風
機周りの設備が大きくなり、設備費も高くついている。 【０００４】 【課題を解決するための手段】本発明は通常風量に応じ
て決定されるダクトとほぼ同じサイズのダクト状の外板
の内部に遠心式送風機を収納し、モーターも防振ゴムを
介して同じくダクト内に設置して、吸込側と吐出側の仕
切板を設けた。これによりダクトは吸込側と吐出側は一
直線で通常のサイズのまま接続可能となり、防振キャン
バス継ぎ手も不必要となる。 【０００５】 【作用】本発明はシロッコファンなどの遠心式送風機と
ダクトサイズの関係に着目、調査した結果、通常空調や
換気に使用されるダクトの断面積は当然風量によって異
なるが、概ね片吸込送風機の渦巻室を吐出口側から見た
断面積の２倍前後の大きさに近いことから、その一辺の
寸法を渦巻室の直径と同じとし、他の一辺の寸法を渦巻
室の厚さの２倍としたダクトに収納できると考えて実施
した結果による。 【０００６】ダクトの気流方向に渦巻室の吐出口を向け
るように前記寸法のダクト内に送風機を収納し、モータ
ーは直結として吸込ベルマウスの中心に位置するように
防振ゴムを介して渦巻室側板に取り付け、吐出側と吸込
側との間に仕切板を設けた。 【０００７】従って、吸込口と吐出口は送風機を挟んで
一直線上に並ぶこととなった。 【０００８】これにより吸込口から吐出口まで通常のダ
クトサイズのまま一直線で前後のダクトに接続出来、方
向を変えたり、芯ずれを調整するためのエルボや変形ダ
クト、速度変更のための漸大管、防振のための防振キャ
ンバスなどが不要となった。 【０００９】 【実施例】以下本発明による送風機の実施例について図
面に沿って説明する。 【図１】は在来のシロッコファンで吸い込み日１は円形
で渦巻室２の側面にあり、吐出口３とは直角方向の関係
にあ、しかも芯がずれていることが判る。 【図２】は在来のシロッコファン４を吸込ダクト５と吐
出ダクト６とに接続した状態を示す。 【００１０】図中７は渦巻室の吐出口３の高速の気流速
度を通常の気流速度に落とすための漸大管、８は吐出側
の角形防振キャンバス、９は吸込側の丸型防振キャンバ
ス、１０は吸込側と吐出側を一直線にするための変形ダ
クト、１１は風量を調節するための風量調節ダンパー、
１２は防振ゴム１３を介して送風機を支持する防振架台
を示す。 【００１１】在来の送風機を実際にダクトの途中に接続
設置するにはこのように多くの付属部品が必要で高価に
つき据え付けスペースも大きく、現場作業で組み立てる
ため工事費も嵩んだ。 【００１２】 【図３】は本発明による送風機の実施例の透視図を示
す。図中１４はダクト状の送風機の鋼板製外板で断面寸
法は縦３５０ｍｍ、横２５０ｍｍ、長さは９００ｍｍ、
内部に縦寸法が前記外板の縦寸法と一致し横寸法の半分
１２５ｍｍの厚さの渦巻室１５を板金部品で構成し、吸
込ベルマウス１６の中心に４個の防振ゴム１７を介して
モーター取付板１８に固定したモーター１９を渦巻室１
５の側面に取り付けている。 【００１３】渦巻室１５の内部には外形寸法２２５ｍ
ｍ、幅９０ｍｍの羽根車２０がモーター１９の軸に直結
されている。図中２１、２２は渦巻室１５の吐出口２３
に接して取り付けられた下方仕切板、側方仕切板で２４
は吸込側の通過抵抗を減じるための傾斜板である。通常
このダクトサイズでは２５ｍ^３／ｍｉｎ程度の風量を扱
う場合が多いが、この送風機は１８００ｒｐｍで２５ｍ
^３／ｍｉｎ、静圧力が３０ｍｍＡｑで、空調や換気に実
用的な性能となる。 【００１４】この回転数を得るには商用周波数では不可
能なのでインバーター２４を同じくダクト内部の空気通
路ではない部分に収納し、これにより１８００ｒｐｍに
回転数を調節する。在来の送風機では風量調節のため風
量調節ダンパーが必要であったが、ダクトサイズに送風
機寸法を合致させるために必要となったインバーターは
自由に回転数を設定できるので、風量調節ダンパーの必
要性がなくなる。 【００１５】インバーターの発熱による温度上昇を防止
するために吐出側または外部と吸込側に通じる通気孔を
設けておくことも考えられる。 【００１６】 【発明の効果】本発明による送風機は実施例に示すよう
に構成したから、在来の遠心式送風機のダクトとの接続
設置の際に必要となったエルボ、変形ダクト、漸大管、
防振キャンバス、防振架台、送風機専用吊りボルト、風
量調節ダンパーなどを全て省略出来、通常サイズのダク
トに吸込口、吐出口の関係をそのまま一直線に接続でき
る。さらに、吸込ベルマウスの中心に位置するモーター
は高速気流による冷却が極めて効果的で小型軽量化、高
速回転化に真に都合がよい。 【００１７】従って、本発明によれば、送風機自体の製
造コストを含めて、周辺部品の費用、据え付け工事費が
節約され、据え付けスペースが節約出来、風量調節が内
装のインバーターの周波数の設定によって理論的に簡単
に行えるなどの多くの利点を提供する。 【００１８】Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a centrifugal blower used by connecting a duct for air conditioning, ventilation and the like. 2. Description of the Related Art Conventionally, in a centrifugal blower, a suction port and a discharge port are often different from each other in a 90 ° direction due to the structural characteristics thereof and are misaligned. In many cases, the speed was considerably higher than the speed normally used in ducts, and many were treated as vibrators. [0005] Therefore, when connecting to a duct, the direction of the duct is changed, and the center is shifted, an elbow or a deformed duct is created.
In order to change the air speed, it is necessary to make a gradual pipe, and to use a vibration-proof canvas joint for vibration control, the equipment around the blower becomes large, and the equipment cost is high. According to the present invention, a centrifugal blower is housed inside a duct-like outer plate having a size substantially the same as that of a duct which is usually determined according to an air volume, and a motor is also provided with an anti-vibration rubber. Also installed in the duct via a separator, a suction side and a discharge side partition plate were provided. As a result, the duct can be connected to the suction side and the discharge side in a straight line with a normal size, and a vibration-proof canvas joint is not required. The present invention pays attention to the relationship between a centrifugal blower such as a sirocco fan and a duct size, and as a result of investigation, it has been found that the cross-sectional area of a duct usually used for air conditioning and ventilation naturally varies depending on the air volume. Since the size of the swirl chamber of the blower is close to twice the cross-sectional area as viewed from the discharge port side, the dimension of one side is the same as the diameter of the swirl chamber, and the dimension of the other side is the thickness of the swirl chamber. It is based on the result of considering that it can be stored in a doubled duct. A blower is housed in a duct of the above-mentioned size so as to direct the discharge port of the spiral chamber in the direction of air flow of the duct, and the motor is directly connected to the spiral chamber via a vibration isolating rubber so as to be located at the center of the suction bell mouth. It was attached to the side plate, and a partition plate was provided between the discharge side and the suction side. Accordingly, the suction port and the discharge port are arranged in a straight line with the blower interposed therebetween. [0008] With this arrangement, the normal duct size can be connected to the front and rear ducts in a straight line from the suction port to the discharge port, and an elbow or a deformed duct for changing the direction or adjusting the misalignment, and a gradual increase for changing the speed. Tubes and anti-vibration canvas for anti-vibration are no longer required. An embodiment of a blower according to the present invention will be described below with reference to the drawings. FIG. 1 shows a conventional sirocco fan, in which the suction date 1 is circular and located on the side surface of the swirl chamber 2, is perpendicular to the discharge port 3, and is off-center. FIG. 2 shows a state in which a conventional sirocco fan 4 is connected to a suction duct 5 and a discharge duct 6. In the figure, reference numeral 7 denotes a divergent pipe for lowering the high-speed airflow velocity at the discharge port 3 of the spiral chamber to a normal airflow velocity, 8 denotes a rectangular vibration-proof canvas on the discharge side, and 9 denotes a round vibration-proof vibration on the suction side. A canvas, 10 is a deformed duct for aligning the suction side and the discharge side, 11 is an air volume adjustment damper for adjusting the air volume,
Reference numeral 12 denotes an anti-vibration gantry that supports a blower via an anti-vibration rubber 13. In order to actually connect and install a conventional blower in the middle of a duct, a large number of accessory parts are required, the installation cost is large and the installation space is large, and the construction cost for assembling on site is high. FIG. 3 shows a perspective view of an embodiment of the blower according to the invention. In the figure, reference numeral 14 denotes a steel plate outer plate of a duct-shaped blower having a cross-sectional dimension of 350 mm in length, 250 mm in width, and 900 mm in length.
A spiral chamber 15 having a vertical dimension equal to the vertical dimension of the outer panel and having a thickness of 125 mm, which is half of the horizontal dimension, is formed of a sheet metal part, and is provided at the center of the suction bell mouth 16 via four rubber cushions 17. The motor 19 fixed to the motor mounting plate 18 is connected to the swirl chamber 1
5 attached to the side. The inside of the spiral chamber 15 has an outer dimension of 225 m.
An impeller 20 having a width of 90 mm and a width of 90 mm is directly connected to the shaft of the motor 19. In the figure, 21 and 22 are discharge ports 23 of the spiral chamber 15.
The lower partition attached in contact with the
Is an inclined plate for reducing the passage resistance on the suction side. Usually, this duct size often handles an air volume of about 25 m ³ / min, but this blower is 25 m at 1800 rpm.
^{At 3} / min and a static pressure of 30 mmAq, the performance is practical for air conditioning and ventilation. Since it is impossible to obtain this rotational speed at the commercial frequency, the inverter 24 is also accommodated in a portion other than the air passage inside the duct, and the rotational speed is adjusted to 1800 rpm. Conventional air blowers required an air flow adjustment damper to adjust the air flow, but the inverter required to match the blower dimensions to the duct size can freely set the number of revolutions, so the need for an air flow adjustment damper Disappears. It is conceivable to provide a ventilation hole communicating with the discharge side or the outside and the suction side in order to prevent a temperature rise due to the heat generated by the inverter. Since the blower according to the present invention is constructed as shown in the embodiment, an elbow, a deformed duct, and a swelling pipe which are required for connection with a duct of a conventional centrifugal blower are provided. ,
The anti-vibration canvas, anti-vibration gantry, hanging bolts dedicated to the blower, damper for adjusting the air volume, etc. can all be omitted, and the relationship between the suction port and the discharge port can be directly connected to a normal-size duct. Furthermore, the motor located at the center of the suction bellmouth is extremely effective in cooling by high-speed airflow, which is truly convenient for miniaturization, lightening, and high-speed rotation. Therefore, according to the present invention, the cost of the peripheral parts, including the manufacturing cost of the blower itself, and the cost of the installation work can be saved, the installation space can be saved, and the air volume can be adjusted by setting the frequency of the internal inverter. It offers many advantages, such as simple and easy operation. [0018]

【図面の簡単な説明】 【図１】は在来のシロッコ型遠心式送風機の説明図、 【図２】は在来の遠心式送風機をダクトに接続設置した
場合の状態を示す説明図、 【図３】は本発明による送風機の実施例の説明図であ
る。 【符号の説明】 １．吸込口 ２．渦巻室 ３．吐出口 ４．在来のシロッコファン ５．吸込ダクト ６．吐出ダクト ７．漸大管 ８．角形防振キャンバス ９．丸型防振キャンバス １０．変形ダクト １１．風量調節ダンパー １２．防振架台 １３．防振ゴム １４．鋼板製造外板 １５．渦巻室 １６．吸込ベルマウス １７．防振ゴム １８．モーター取付板 １９．モーター ２０．羽根車 ２１．下方仕切板 ２２．側方仕切板 ２３．吐出口 ２４．傾斜板 ２５．インバーターBRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view of a conventional sirocco centrifugal blower, FIG. 2 is an explanatory view showing a state in which a conventional centrifugal blower is connected to a duct, and FIG. FIG. 3 is an explanatory view of an embodiment of a blower according to the present invention. [Explanation of Codes] Suction port 2. Spiral chamber 3. Discharge port 4. 4. Traditional sirocco fan 5. Suction duct Discharge duct7. Scalpel 8. 8. Square anti-vibration canvas 10. Round anti-vibration canvas Deformed duct 11. 11. Air volume adjustment damper 12. Anti-vibration gantry 13. Anti-vibration rubber Steel plate manufacturing outer plate 15. Spiral chamber 16. Suction bell mouth 17. Anti-vibration rubber 18. Motor mounting plate 19. Motor 20. Impeller 21. Lower partition plate 22. Side partition plate 23. Discharge port 24. Inclined plate 25. inverter

Claims (1)

【特許請求の範囲】 【請求項 １】長方形または正方形の断面の一辺が片吸
込遠心式送風機の渦巻室の径と同じかまたはほぼ等しい
寸法で、他の一辺が渦巻室の厚さの概ね２倍の寸法であ
るダクトに前記片吸込遠心式送風機を収納し、同じくダ
クト内にモーターを配置し吸込側と吐出側の仕切りを設
けた送風機。 【請求項 ２】モーターの回転数調節用のインバーター
を前記ダクト内に収納した 【請求項１】の送風機。Claims: 1. A rectangular or square cross-section having one side having a dimension equal to or substantially equal to the diameter of a spiral chamber of a single-suction centrifugal blower, and the other side having a thickness of approximately 2 spiral chambers. A blower in which the single-suction centrifugal blower is housed in a duct having a double size, and a motor is also arranged in the duct to provide a partition between a suction side and a discharge side. 2. The blower according to claim 1, wherein an inverter for adjusting the rotation speed of the motor is housed in the duct.