JP2016075243A

JP2016075243A - Centrifugal blower

Info

Publication number: JP2016075243A
Application number: JP2014207013A
Authority: JP
Inventors: 峰明磯田; Mineaki Isoda; 智彦納家; Tomohiko Naya; 将人日高; Masahito Hidaka; 浩二久山; Koji Kuyama
Original assignee: Panasonic Intellectual Property Management Co Ltd
Current assignee: Panasonic Intellectual Property Management Co Ltd
Priority date: 2014-10-08
Filing date: 2014-10-08
Publication date: 2016-05-12

Abstract

PROBLEM TO BE SOLVED: To provide a centrifugal blower having waterproof properties without lowering air blowing performance as centrifugal blower for battery cooling which performs forced-air cooling of a battery by sucking air in a cabin has, in the case where intrusion of a large amount of water from an intake port of the centrifugal blower such as a passenger spilling water in the cabin and the like, the risk of a motor and a circuit part incorporated in the motor being wet with water by water accumulating inside the centrifugal blower can be assumed, depending on the way of use.SOLUTION: When a fan of a centrifugal blower stops, a lid is opened, and the water entered the centrifugal blower is drained through a water drain hole. When the fan is operating, air leakage from a water drain hole is prevented by closing the lid. Thus, while securing air blowing performance, the entered water is drained from a fan blowout port.SELECTED DRAWING: Figure 1

Description

本発明は、吸排気からの水の浸入が想定される遠心送風機に係り、水抜き機構を備え耐水性を有する遠心送風機に関する。 The present invention relates to a centrifugal blower that is assumed to enter water from intake and exhaust, and relates to a centrifugal blower having a water draining mechanism and having water resistance.

屋外機器や車載など被水の危険性のある用途に使用される機器は耐水性が要求される。モータおよびモータを駆動する回路（モータ駆動回路）を内蔵したファン、ブロア等の送風機において、水の浸入により回路部が被水した場合、回路の誤動作や故障を引き起こす可能性がある。回路部への被水を防止するために、ファンケース部に浸入した水を排水するための水抜き穴を設ける構造が提案されている。 Water resistance is required for equipment used in applications where there is a risk of being exposed to water, such as outdoor equipment and on-vehicle equipment. In a blower such as a fan or a blower having a built-in motor and a circuit for driving the motor (motor drive circuit), if the circuit section gets wet due to water intrusion, it may cause malfunction or failure of the circuit. In order to prevent flooding of the circuit portion, a structure in which a drain hole for draining water that has entered the fan case portion has been proposed.

特許第３８１７８５７号公報Japanese Patent No. 3817857

車室内の空気を吸入して電池を強制空冷する電池冷却用の遠心送風機など、使われ方によっては、車室内で乗客が水をこぼすなどにより遠心送風機の吸気口より大量の水の浸入が想定されるような場合、遠心送風機の内部に水がたまることで、モータおよびモータに内蔵した回路部に被水するおそれがある。これを防止するために流路に水抜き穴を設けるが、穴の面積が小さいと十分な排水性を確保できず回路部を被水させてしまう。逆に十分な排水性を確保する大きな穴を流路に設けた場合、水抜き穴より空気が漏れることで送風性能を低下させてしまうという課題があった。本発明は前記従来の課題を解決するもので、送風性能を低下させることなく排水性を確保することで耐水性と送風性能を両立した遠心送風機を提供することである。 Depending on how it is used, such as a centrifugal fan for battery cooling that sucks air in the passenger compartment and forcibly air-cools the battery, it is assumed that a large amount of water will infiltrate from the inlet of the centrifugal fan due to passengers spilling water in the passenger compartment. In such a case, water accumulates in the centrifugal blower, and there is a possibility that the motor and the circuit unit built in the motor may be covered with water. In order to prevent this, a drain hole is provided in the flow path. However, if the area of the hole is small, sufficient drainage cannot be ensured and the circuit portion is flooded. On the other hand, when a large hole for ensuring sufficient drainage is provided in the flow path, there is a problem that the air blowing performance is deteriorated due to air leaking from the drain hole. This invention solves the said conventional subject, and is providing the centrifugal blower which made water resistance and ventilation performance compatible by ensuring drainage property, without reducing ventilation performance.

遠心送風機のファン（羽根車）動作時（回転時）は、ファン吸気口より浸入した水は空気といっしょにファン吹出口より排出されるため、排水が必要となるのはファン停止時である。ファンケース部に十分は排水性をもつ水抜き穴と開閉可能なふたを設けて、ファン停止時にふたを開き、遠心送風機に浸入した水を水抜き穴より排水し、ファンが動作しているときは、ふたを閉じることで水抜き穴からの空気の漏れを防止することで送風性能を確保しつつ、浸入した水はファン吹出口より排水する。 When the fan (impeller) of the centrifugal blower is operating (during rotation), the water that has entered from the fan air inlet is discharged from the fan outlet along with the air, so that drainage is required when the fan is stopped. When the fan case is equipped with a drainage hole with sufficient drainage and a lid that can be opened and closed, the lid is opened when the fan stops, and the water that has entered the centrifugal fan is drained from the drainage hole and the fan is operating The intruded water is drained from the fan outlet while ensuring air blowing performance by preventing air leakage from the drain hole by closing the lid.

本発明によれば、耐水性と送風性能を両立した遠心送風機を提供することができる。 According to the present invention, it is possible to provide a centrifugal blower that has both water resistance and air blowing performance.

（ａ）本発明の遠心送風機の実施の形態１（吸気口向き）を示す斜視図（ｂ）本発明の遠心送風機の実施の形態１（吸気口が裏向き）を示す斜視図(A) Perspective view showing Embodiment 1 (intake port direction) of the centrifugal blower of the present invention (b) Perspective view showing Embodiment 1 (intake port facing backward) of the centrifugal blower of the present invention 本発明の遠心送風機の実施の形態１の別の形態を示す斜視図The perspective view which shows another form of Embodiment 1 of the centrifugal blower of this invention. （ａ）本発明の実施の形態１の開閉機構の水抜き穴が開いた時の動作を示す説明図（ｂ）本発明の実施の形態１の開閉機構の水抜き穴が閉じた時の動作を示す説明図(A) Explanatory drawing which shows operation | movement when the drain hole of the opening / closing mechanism of Embodiment 1 of this invention opens (b) Operation | movement when the drain hole of the opening / closing mechanism of Embodiment 1 of this invention closes Explanatory drawing showing （ａ）本発明の遠心送風機の実施の形態２を示す説明図（ｂ）開閉機構の拡大図(A) Explanatory drawing which shows Embodiment 2 of the centrifugal blower of this invention (b) The enlarged view of an opening-closing mechanism

以下、本発明の実施の形態における遠心送風機について図を用いて説明をする。 Hereinafter, the centrifugal blower in the embodiment of the present invention will be described with reference to the drawings.

（実施の形態１）
図１は、本発明の遠心送風機の第１の実施の形態を説明する斜視図である。
遠心送風機はファンケース１１とファン１２およびモータ１３より構成されており、モータ１３はファンケース１１に取り付けられている。モータ１３によりファン１２を回転させることによって、ファン吸気口１ｂより外気を取り入れて、ファン吹出口１ａより冷却風として送り出す。 (Embodiment 1)
FIG. 1 is a perspective view for explaining a first embodiment of a centrifugal blower of the present invention.
The centrifugal blower includes a fan case 11, a fan 12, and a motor 13, and the motor 13 is attached to the fan case 11. By rotating the fan 12 by the motor 13, the outside air is taken in from the fan air inlet 1b and sent out as cooling air from the fan air outlet 1a.

ファンケース１１にはモータ１３の取付部よりも下部に水抜き穴１ｃとこの水抜き穴を開閉可能なふた１ｄを設けており、ふた１ｄは開閉機構１ｅにより水抜き穴１ｃの開閉を行う。 The fan case 11 is provided with a drain hole 1c and a lid 1d that can open and close the drain hole 1c below the mounting portion of the motor 13, and the lid 1d opens and closes the drain hole 1c by an opening / closing mechanism 1e.

ここで、水抜き穴１ｃ、ふた１ｄの設置場所は搭載される遠心送風機の姿勢によって、モータよりも下部に位置するように配置する。図２にファン吸気口を上向きに遠心送風機を搭載する場合の例を示す。 Here, according to the attitude | position of the centrifugal blower mounted, the installation place of the drain hole 1c and the lid | cover 1d is arrange | positioned so that it may be located below a motor. FIG. 2 shows an example in which a centrifugal blower is mounted with the fan intake port facing upward.

この場合の遠心送風機のファンケース１１に取り付けられる水抜き穴１ｃの場所は水が溜まる重力方向、つまりファンケース１１の下でありファン吸気口１ｂの反対側となる。 The location of the drain hole 1c attached to the fan case 11 of the centrifugal blower in this case is in the direction of gravity in which water accumulates, that is, below the fan case 11 and opposite to the fan intake port 1b.

開閉機構１ｅは、ファン１２が回転して送風しているときは、ふた１ｄを閉じて、ファンが停止しているときはふた１ｄを開く動作を行う。 The opening / closing mechanism 1e performs an operation of closing the lid 1d when the fan 12 is rotating and blowing air, and opening the lid 1d when the fan is stopped.

開閉機構１ｅの一実施例として図３を用いて説明を行う。図３はファン動作時の状態、図４はファン停止時の状態を示す。板１ｆは冷却風の流れがあり、送風時に力を受けるところに配置し、連結部１ｇにより、ふた１ｄとつながっている。ファン停止時はバネなどの弾性材を利用した機構、開閉機構１ｅ自身の重さを利用した機構などにより、図４に示すようにふた１ｄは水抜き穴１ｃを開く位置にいる。ファン動作時は冷却風の速度（動圧）により、板１ｆが力を受けて連結部１ｇをへてふた１ｄを動かすことで水抜き穴１ｃを閉じる。 An embodiment of the opening / closing mechanism 1e will be described with reference to FIG. FIG. 3 shows a state when the fan is operating, and FIG. 4 shows a state when the fan is stopped. The plate 1f has a flow of cooling air and is disposed where it receives a force during blowing, and is connected to the lid 1d by a connecting portion 1g. When the fan is stopped, the lid 1d is at a position where the drain hole 1c is opened as shown in FIG. 4 by a mechanism using an elastic material such as a spring and a mechanism using the weight of the opening / closing mechanism 1e itself. During the fan operation, the drainage hole 1c is closed by moving the lid 1d through the connecting portion 1g by the plate 1f receiving force due to the speed (dynamic pressure) of the cooling air.

（実施の形態２）
本発明の遠心送風機の開閉機構２ｅの第２の実施の形態について図４を用いて説明する。 (Embodiment 2)
A second embodiment of the opening / closing mechanism 2e of the centrifugal fan of the present invention will be described with reference to FIG.

ふた２ｄは外力がない状態では水抜き穴２ｃを開くように成形されている。ファン停止時は、ファンケースの内外が同じ気圧のため、水抜き穴２ｃは開いた上体である。ファン動作時は、送風によりファンケース内部の気圧が上昇し、ファンケース内外の気圧差によってふた２ｄが水抜き穴２ｃを閉じる。ふた２ｄは、蝶番で止められた部分を軸に弧を描いて開閉するドアや、ふたを２等分する位置を中心軸とし羽のように回転する回転ドアのようなものでも、ふたを樹脂性の薄い板とし、その板の弾性変形により開閉させたものものでもよい。 The lid 2d is formed so as to open the drain hole 2c when there is no external force. When the fan is stopped, the inside and outside of the fan case have the same atmospheric pressure, so the drain hole 2c is an open upper body. During fan operation, the air pressure inside the fan case rises due to air blowing, and the lid 2d closes the drain hole 2c due to the difference in air pressure inside and outside the fan case. The lid 2d may be a door that opens and closes by drawing an arc around the hinged part, or a revolving door that rotates like a wing around the position where the lid is divided in half. It may be a thin plate that is opened and closed by elastic deformation of the plate.

（実施の形態３）
本発明の遠心送風機の開閉機構１ｅの第３の実施の形態を示す。 (Embodiment 3)
3rd Embodiment of the opening / closing mechanism 1e of the centrifugal blower of this invention is shown.

開閉機構１ｅはモータやソレノイドなどの電磁力による駆動系にて構成してもよい。ファンの駆動信号により、ファン停止時はふた１ｄを開き、ファン動作時はふた１ｄを閉じる機構を有する（図示なし）。 The opening / closing mechanism 1e may be configured by a drive system using electromagnetic force such as a motor or a solenoid. According to the fan drive signal, the lid 1d is opened when the fan is stopped, and the lid 1d is closed when the fan is operating (not shown).

以上のように、本発明にかかる遠心送風機は、車室内の空気を吸入して電装品を冷却する送風機など、送風性能を低下させることなく排水性を確保することで耐水性と送風性能を両立した送風機に有用である。 As described above, the centrifugal blower according to the present invention achieves both water resistance and blowing performance by ensuring drainage without reducing the blowing performance, such as a blower that sucks air in the passenger compartment and cools electrical components. Useful for blowers.

１１ファンケース
１２ファン（羽根車）
１３モータ（駆動回路含む）
１ａファン吹出口
１ｂファン吸気口
１ｃ、２ｃ水抜き穴
１ｄ、２ｄふた
１ｅ、２ｅ開閉機構
１ｆ板
１ｇ連結部 11 Fan case 12 Fan (impeller)
13 Motor (including drive circuit)
1a Fan outlet 1b Fan inlet 1c, 2c Drain hole 1d, 2d Lid 1e, 2e Opening / closing mechanism 1f Plate 1g Connecting part

Claims

A centrifugal blower having a fan, a motor for rotating the fan, and a motor driving circuit for driving the motor, and covered with a fan case, wherein the water drain hole and the water drain hole can be opened and closed. A centrifugal blower comprising a lid and an opening / closing mechanism for the lid.

The centrifugal blower according to claim 1, wherein the opening / closing mechanism opens the lid when the fan is stopped and closes the lid when the fan is operating.

The centrifugal blower according to claim 2, wherein the opening / closing mechanism opens and closes the lid using a pressure generated by an air flow generated by a fan operation as power.

The centrifugal blower according to claim 2, wherein the opening / closing mechanism opens and closes the lid using a pressure difference between the inside and outside of the fan case when the fan is operating and when the fan is stopped.

The centrifugal blower according to claim 2, wherein the opening / closing mechanism opens / closes the drain hole by a fan drive signal and opens / closes the drain hole by means using electromagnetic force.

The centrifugal blower according to claim 5, wherein the means using the electromagnetic force is a motor or a solenoid.

The centrifugal blower according to claim 2, wherein the drain hole is located in a gravity direction of the fan case.