JP2018003764A - Blower - Google Patents

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Publication number
JP2018003764A
JP2018003764A JP2016133987A JP2016133987A JP2018003764A JP 2018003764 A JP2018003764 A JP 2018003764A JP 2016133987 A JP2016133987 A JP 2016133987A JP 2016133987 A JP2016133987 A JP 2016133987A JP 2018003764 A JP2018003764 A JP 2018003764A
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Prior art keywords
impeller
blower
casing
cylindrical body
bell mouth
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Pending
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JP2016133987A
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Japanese (ja)
Inventor
堀江 威史
Takeshi Horie
威史 堀江
丈夫 柏木
Takeo Kashiwagi
丈夫 柏木
貴 丸山
Takashi Maruyama
貴 丸山
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Kamakura Seisakusho KK
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Kamakura Seisakusho KK
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Priority to JP2016133987A priority Critical patent/JP2018003764A/en
Publication of JP2018003764A publication Critical patent/JP2018003764A/en
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Abstract

PROBLEM TO BE SOLVED: To provide a blower which reduces noise, inhibits deterioration of ventilation performance, and achieves energy saving.SOLUTION: A blower 1 comprises: a casing 2 comprising a cylindrical body part 3 and a bell mouth 4; an electric motor 7 fixed to an interior part of the casing 2; and a propeller type impeller 9 attached to a rotary shaft 7a of the electric motor 7. The propeller type impeller 9 is positioned in the bell mouth 4, and an outer diameter of the propeller type impeller 9 is set larger than an inner diameter of the cylindrical body part 3.SELECTED DRAWING: Figure 4

Description

本発明は、工場や倉庫の換気や暑気対策並びに製品冷却等に用いる送風機に関するものである。   The present invention relates to a blower used for ventilation and countermeasures against hot air in a factory or a warehouse, product cooling, and the like.

工場や倉庫の換気や暑気対策並びに製品冷却等に用いる送風機は、円筒状の胴部と、該胴部の吸い込み側に連成するベルマウスとからなるケーシングと、該ケーシング内に固定する電動機と、該電動機の回転軸に取り付けるプロペラ式の羽根車とからなるものである。   A blower used for ventilation and countermeasures against heat in factories and warehouses, product cooling, etc. includes a casing made up of a cylindrical body, a bell mouth coupled to the suction side of the body, and an electric motor fixed in the casing. And a propeller type impeller attached to the rotating shaft of the electric motor.

そして、従来の送風機は、図11に示す構造及び作用の如く、羽根車がケーシングにおける円筒状の胴部(ボディ)内に位置し且つ該羽根車の外径は当然ながら該胴部の内径より小さい。   In the conventional blower, as shown in FIG. 11, the impeller is located in the cylindrical body (body) of the casing, and the outer diameter of the impeller is naturally larger than the inner diameter of the body. small.

一般的に軸流ファンを運転すると、図8に示す如く、ファンの吸い込み側は負圧(大気に対してマイナス圧力)になり、吹き出し側は陽圧(プラス圧力)になる。そして、この圧力差を保つことによりファンとしての性能を充分に発揮することができるものである。そしてまた、この圧力差を保つ役目をするものが円筒状の胴部(ボディ)であり、羽根車の先端部と該胴部の内面との隙間を極力小さくすることによって圧力差をより多く保つことができるのである。   In general, when an axial fan is operated, as shown in FIG. 8, the suction side of the fan has a negative pressure (negative pressure with respect to the atmosphere), and the discharge side has a positive pressure (plus pressure). And by maintaining this pressure difference, the performance as a fan can be fully exhibited. In addition, it is a cylindrical body (body) that plays a role in maintaining the pressure difference, and by keeping the gap between the tip of the impeller and the inner surface of the body as small as possible, the pressure difference is kept larger. It can be done.

また、円筒の中へある風速で空気を通過させると、図9に示す如く、円筒の内面との摩擦により円筒内面付近の風速が遅くなる(流体と固体の境界面は流速ゼロになる。)。また、軸流ファンを運転すると、図10に示す如く、軸流方向とは別に回転方向への風速成分が発生し、且つ羽根車の端部に乱流が発生する。   When air is passed through the cylinder at a certain wind speed, the wind speed near the inner surface of the cylinder is slowed by friction with the inner surface of the cylinder, as shown in FIG. 9 (the boundary surface between the fluid and the solid becomes zero in flow velocity). . Further, when the axial fan is operated, as shown in FIG. 10, a wind speed component in the rotational direction is generated separately from the axial flow direction, and turbulence is generated at the end of the impeller.

そして、従来の送風機は、前記の通りの構造であり、また、前記羽根車の回転方向の風速成分や羽根車の端部に発生する乱流は、軸流方向と直交する方向であるため、軸流方向の風速が遅い部位(円筒状の胴部の内面付近)においてこの直交する風速は胴部の摩擦による影響もなく、また、軸流方向の風速が遅いためこの影響も少なく、円筒状の胴部の内面へと衝突し、跳ね返って円筒状の胴部の中心方向へ向うことになる。そして、これが軸流方向の風と衝突し、送風機主流の軸流方向の風の流れを乱す要因となっている。そして、この主流の軸流方向の風の流れが乱れることにより、騒音が高くなったり、圧力変動が起きて振動が大きくなったり、電動機の負荷が大きくなったりする等の問題が起こることになるものである。 And the conventional blower has the structure as described above, and the wind speed component in the rotational direction of the impeller and the turbulent flow generated at the end of the impeller are in a direction orthogonal to the axial flow direction. In the part where the wind speed in the axial flow direction is slow (near the inner surface of the cylindrical body), the perpendicular wind speed is not affected by the friction of the body, and this effect is small because the wind speed in the axial direction is slow. It collides with the inner surface of the body part of the body and bounces back toward the center of the cylindrical body part. And this collides with the wind of an axial flow direction, and becomes a factor which disturbs the flow of the wind of the axial flow direction of a fan mainstream. Then, the disturbance of the wind flow in the axial direction of the main flow causes problems such as high noise, pressure fluctuations, large vibrations, and a large load on the motor. Is.

本発明は上記の点に鑑みなされたものであって、羽根車の先端部が軸流方向の風速が遅くならない位置になるように、即ち、内面の摩擦を受けて風速が遅くなる円筒状の胴部ではなく、ベルマウス内に位置せしめて羽根車を取り付けることにより、羽根車の回転方向の風速成分や羽根車の先端部の乱流等の風速成分(軸流方向と直交する成分)を、主流の軸流方向の風の流れに沿った方向へ押しやることができるようになし、もって上記従来の問題点を悉く解消することができるようになした送風機を提供しようとするものである。   The present invention has been made in view of the above points, and is a cylindrical shape in which the tip of the impeller is in a position where the wind speed in the axial direction does not slow down, that is, the wind speed slows down due to friction on the inner surface. By installing the impeller in the bell mouth instead of the trunk, wind speed components (components orthogonal to the axial flow direction) such as wind speed components in the rotational direction of the impeller and turbulent flow at the tip of the impeller An object of the present invention is to provide a blower which can be pushed in a direction along the wind flow in the axial direction of the mainstream and can solve the above-mentioned conventional problems.

而して、本発明の要旨とするところは、円筒状の胴部と、該胴部の吸い込み側に連成するベルマウスとからなるケーシングと、該ケーシング内に固定する電動機と、該電動機の回転軸に取り付けるプロペラ式の羽根車とからなる送風機において、前記プロペラ式の羽根車を前記ベルマウス内に位置せしめると共に、前記プロペラ式の羽根車の外径を、前記円筒状の胴部の内径より大きくなしたことを特徴とする送風機にある。   Thus, the gist of the present invention is that a casing made of a cylindrical body, a bell mouth coupled to the suction side of the body, a motor fixed in the casing, In a blower comprising a propeller type impeller attached to a rotating shaft, the propeller type impeller is positioned in the bell mouth, and the outer diameter of the propeller type impeller is set to the inner diameter of the cylindrical body. The blower is characterized by being made larger.

本発明は上記の如く、プロペラ式の羽根車をベルマウス内に位置せしめると共に、プロペラ式の羽根車の外径を、円筒状の胴部の内径より大きくなしたものであり、羽根車の先端部が軸流方向の風速が遅くならない位置、即ち、内面の摩擦を受けて風速が遅くなる円筒状の胴部ではなく、ベルマウス内に位置せしめて羽根車を取り付けたものであるから、羽根車の回転方向の風速成分や羽根車の先端部の乱流等の風速成分(軸流方向と直交する成分)を、主流の軸流方向の風の流れに沿った方向へ押しやることができるものである。もって、主流の軸流方向の風の流れが乱れることに起因する、騒音が高くなったり、圧力変動が起きて振動が大きくなったり、電動機の負荷が大きくなったりする等の従来における問題点を悉く解消することができるものである。   As described above, the present invention is such that the propeller-type impeller is positioned in the bell mouth, and the outer diameter of the propeller-type impeller is made larger than the inner diameter of the cylindrical body, and the tip of the impeller The position where the wind speed in the axial direction does not slow down, that is, not the cylindrical body where the wind speed slows down due to friction on the inner surface, but it is located in the bell mouth and the impeller is attached. It can push the wind speed component in the rotational direction of the car and the wind speed component such as turbulent flow at the tip of the impeller (component orthogonal to the axial flow direction) in the direction along the wind flow in the mainstream axial flow direction. It is. As a result, conventional problems such as increased noise, increased pressure due to fluctuations in pressure, and increased load on the motor due to disturbance of the wind flow in the axial direction of the mainstream. It can be solved ugly.

本発明の実施形態に係る送風機の左側面図である。It is a left view of the air blower concerning the embodiment of the present invention. 同背面図である。It is the same rear view. 同平面図である。It is the same top view. 同中央縦断側面図である。It is the center longitudinal cross-sectional side view. 同ケーシングの右側面図である。It is a right view of the casing. 同ケーシングの背面図である。It is a rear view of the casing. 同作用説明図である。FIG. 従来の送風機の概略的説明図である。It is a schematic explanatory drawing of the conventional air blower. 従来の送風機における風速の説明図である。It is explanatory drawing of the wind speed in the conventional air blower. 従来の送風機における回転方向への風速成分の発生の説明図である。It is explanatory drawing of generation | occurrence | production of the wind speed component to the rotation direction in the conventional air blower. 従来の送風機の構造と作用の説明図である。It is explanatory drawing of the structure and effect | action of the conventional air blower.

以下、本発明を実施するための形態について、図面を参照して説明する。   Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

図中、1は送風機である。また、該送風機1は、後記ケーシングと、電動機と、プロペラ式の羽根車とからなるものである。   In the figure, 1 is a blower. The blower 1 is composed of a casing, a motor, and a propeller impeller described later.

2は前記送風機1における、円筒状の胴部3と、該胴部3の吸い込み側に連成するベルマウス4とからなるケーシングである。また、該ケーシング2における円筒状の胴部3の頂部外面には、吊り上げ用リング2Aを設け、またケーシング2の吸い込み側と吐出側の開口には網状の安全ガード2Bを取り付けている。 Reference numeral 2 denotes a casing of the blower 1 including a cylindrical body 3 and a bell mouth 4 coupled to the suction side of the body 3. Further, a lifting ring 2A is provided on the outer surface of the top of the cylindrical body 3 in the casing 2, and a net-like safety guard 2B is attached to the suction side and discharge side openings of the casing 2.

5は前記ケーシング2を俯仰角度調節自在に支持する支持フレームであり、下部にキャスター6を備えている。尚、5A、5Bは前記支持フレーム5とケーシング2との連結部材である。 Reference numeral 5 denotes a support frame that supports the casing 2 so that the angle of elevation can be adjusted. Reference numerals 5A and 5B denote connecting members between the support frame 5 and the casing 2.

7は前記ケーシング2における円筒状の胴部3の内部に固定する電動機である。また、8は該電動機7を円筒状の胴部3の内部に支持固定するステーである。   Reference numeral 7 denotes an electric motor that is fixed inside the cylindrical body 3 of the casing 2. Reference numeral 8 denotes a stay that supports and fixes the electric motor 7 inside the cylindrical body 3.

9は前記電動機7の回転軸7aに取り付けるプロペラ式の羽根車である。また、本実施形態においては、該プロペラ式の羽根車9として金属製のものを用いているが他の材質のものを用いるようにしてもよい。   Reference numeral 9 denotes a propeller-type impeller attached to the rotating shaft 7a of the electric motor 7. In this embodiment, the propeller type impeller 9 is made of metal, but may be made of other materials.

以上の構成においては従来の送風機と同様である。而して、本実施形態において特徴とするところは、前記プロペラ式の羽根車9を前記ベルマウス4内に位置せしめると共に、前記プロペラ式の羽根車9の外径L1を、前記円筒状の胴部3の内径Lより大きくなしたことにある。   The above configuration is the same as that of a conventional blower. Thus, the present embodiment is characterized in that the propeller impeller 9 is positioned in the bell mouth 4 and the outer diameter L1 of the propeller impeller 9 is set to the cylindrical barrel. This is because it is larger than the inner diameter L of the portion 3.

次に、本実施形態の作用について説明する。
前記の如く、プロペラ式の羽根車9をベルマウス4内に位置せしめると共に、プロペラ式の羽根車9の外径を、円筒状の胴部3の内径より大きくなし、羽根車9の先端部が軸流方向の風速が遅くならない位置、即ち、内面の摩擦を受けて風速が遅くなる円筒状の胴部3ではなく、ベルマウス4内に位置せしめて羽根車9を取り付けたものであるから、図7に示す如く、羽根車9の回転方向の風速成分や羽根車9の先端部の乱流等の風速成分(軸流方向と直交する成分)を、主流の軸流方向の風の流れに沿った方向へ押しやることができるものである。もって、主流の軸流方向の風の流れが乱れることに起因する、騒音が高くなったり、圧力変動が起きて振動が大きくなったり、電動機の負荷が大きくなったりする等の従来における問題点を悉く解消することができるものである。
Next, the operation of this embodiment will be described.
As described above, the propeller-type impeller 9 is positioned in the bell mouth 4 and the outer diameter of the propeller-type impeller 9 is made larger than the inner diameter of the cylindrical body 3 so that the tip of the impeller 9 is Since the wind speed in the axial direction does not slow down, that is, not the cylindrical body 3 where the wind speed slows down due to friction on the inner surface, but the impeller 9 is mounted in the bell mouth 4 so as to be attached. As shown in FIG. 7, wind velocity components (components orthogonal to the axial flow direction) such as wind velocity components in the rotational direction of the impeller 9 and turbulent flow at the tip of the impeller 9 are converted into wind flow in the mainstream axial flow direction. It can be pushed in the direction along. As a result, conventional problems such as increased noise, increased pressure due to fluctuations in pressure, and increased load on the motor due to disturbance of the wind flow in the axial direction of the mainstream. It can be solved ugly.

1 送風機
2 ケーシング
3 円筒状の胴部
4 ベルマウス
5 支持フレーム
6 キャスター
7 電動機
8 ステー
9 プロペラ式の羽根車
DESCRIPTION OF SYMBOLS 1 Blower 2 Casing 3 Cylindrical trunk | drum 4 Bellmouth 5 Support frame 6 Caster 7 Electric motor 8 Stay 9 Propeller type impeller

Claims (1)

円筒状の胴部と、該胴部の吸い込み側に連成するベルマウスとからなるケーシングと、該ケーシング内に固定する電動機と、該電動機の回転軸に取り付けるプロペラ式の羽根車とからなる送風機において、前記プロペラ式の羽根車を前記ベルマウス内に位置せしめると共に、前記プロペラ式の羽根車の外径を、前記円筒状の胴部の内径より大きくなしたことを特徴とする送風機。
A blower comprising a casing made of a cylindrical body, a bell mouth coupled to the suction side of the body, an electric motor fixed in the casing, and a propeller impeller attached to the rotating shaft of the electric motor The blower is characterized in that the propeller impeller is positioned in the bell mouth, and the outer diameter of the propeller impeller is made larger than the inner diameter of the cylindrical body.
JP2016133987A 2016-07-06 2016-07-06 Blower Pending JP2018003764A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5180891U (en) * 1974-12-20 1976-06-28
US4657483A (en) * 1984-11-16 1987-04-14 Bede James D Shrouded household fan
JPH05322247A (en) * 1991-11-20 1993-12-07 Univ Bath Partial clean air system
JPH0828926A (en) * 1994-07-19 1996-02-02 Mitsubishi Electric Corp Blower
JP2003013892A (en) * 2001-04-26 2003-01-15 Daikin Ind Ltd Blower and air conditioner with blower
JP2008075931A (en) * 2006-09-20 2008-04-03 Matsushita Electric Ind Co Ltd Air supply type ventilating fan and simultaneous supply and exhaust type ventilating fan
JP2009275524A (en) * 2008-05-12 2009-11-26 Mitsubishi Electric Corp Axial flow blower
KR100978594B1 (en) * 2000-06-16 2010-08-27 로버트 보쉬 코포레이션 Automotive fan assembly with flared shroud and fan with conforming blade tips
JP2011064096A (en) * 2009-09-16 2011-03-31 Mitsubishi Electric Corp Electric blower and vacuum cleaner using the same
US20110223024A1 (en) * 2010-03-10 2011-09-15 Robert Bosch Gmbh Skewed axial fan assembly
JP2013163974A (en) * 2012-02-09 2013-08-22 Mitsubishi Electric Corp Blower, outdoor unit and refrigerating cycle device
JP2016056772A (en) * 2014-09-11 2016-04-21 日立アプライアンス株式会社 Propeller fan and air conditioner with the same

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5180891U (en) * 1974-12-20 1976-06-28
US4657483A (en) * 1984-11-16 1987-04-14 Bede James D Shrouded household fan
JPH05322247A (en) * 1991-11-20 1993-12-07 Univ Bath Partial clean air system
JPH0828926A (en) * 1994-07-19 1996-02-02 Mitsubishi Electric Corp Blower
KR100978594B1 (en) * 2000-06-16 2010-08-27 로버트 보쉬 코포레이션 Automotive fan assembly with flared shroud and fan with conforming blade tips
JP2003013892A (en) * 2001-04-26 2003-01-15 Daikin Ind Ltd Blower and air conditioner with blower
JP2008075931A (en) * 2006-09-20 2008-04-03 Matsushita Electric Ind Co Ltd Air supply type ventilating fan and simultaneous supply and exhaust type ventilating fan
JP2009275524A (en) * 2008-05-12 2009-11-26 Mitsubishi Electric Corp Axial flow blower
JP2011064096A (en) * 2009-09-16 2011-03-31 Mitsubishi Electric Corp Electric blower and vacuum cleaner using the same
US20110223024A1 (en) * 2010-03-10 2011-09-15 Robert Bosch Gmbh Skewed axial fan assembly
JP2013163974A (en) * 2012-02-09 2013-08-22 Mitsubishi Electric Corp Blower, outdoor unit and refrigerating cycle device
JP2016056772A (en) * 2014-09-11 2016-04-21 日立アプライアンス株式会社 Propeller fan and air conditioner with the same

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