JP2838658B2 - Electric fan - Google Patents
Electric fanInfo
- Publication number
- JP2838658B2 JP2838658B2 JP6237557A JP23755794A JP2838658B2 JP 2838658 B2 JP2838658 B2 JP 2838658B2 JP 6237557 A JP6237557 A JP 6237557A JP 23755794 A JP23755794 A JP 23755794A JP 2838658 B2 JP2838658 B2 JP 2838658B2
- Authority
- JP
- Japan
- Prior art keywords
- motor
- casing
- air
- front wall
- fan
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
- F04D25/082—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit having provision for cooling the motor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Housings, Intake/Discharge, And Installation Of Fluid Heaters (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、燃焼用の空気を給湯器
のバーナなどへ供給したり、燃焼排気を排出したりする
ための電動ファンに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric fan for supplying combustion air to a burner of a water heater and discharging combustion exhaust gas.
【０００２】[0002]
【従来の技術】気体を送出する電動ファンにおいては、
該気体が熱い場合にはその熱がモータを加熱するおそれ
があり、これを防止するために種々の遮熱手段又は冷却
手段がとられている。例えば実開昭６３−１５４７９７
号公報のものにおいては、軸受前部を覆うようにモータ
軸に断熱風切り板を設けて、熱気が軸受に接触するのを
防止している。2. Description of the Related Art In an electric fan for delivering gas,
If the gas is hot, the heat may heat the motor, and various heat shielding means or cooling means are employed to prevent this. For example, Japanese Utility Model Application Laid-Open No. 63-154797
In the publication, a heat insulating windbreak plate is provided on the motor shaft so as to cover the front part of the bearing to prevent hot air from contacting the bearing.
【０００３】また、実開平４−５４９９９号公報のもの
は、モータの軸受に対向する部分に導入口をあけた中間
板を、モータの前壁と間隔をあけて取付け、該中間板の
前方に冷却ファンを設けた構成をもち、該冷却ファンの
吸引作用で、空気を前記間隔の外周側から軸受外面に集
中させて中間板の導入口から吸引するものであり、冷却
ファンで吸引する空気によって中間板と軸受を冷却して
いる。In Japanese Unexamined Utility Model Publication No. 4-54999, an intermediate plate having an inlet opening at a portion facing a bearing of a motor is mounted at a distance from a front wall of the motor, and is provided in front of the intermediate plate. It has a configuration in which a cooling fan is provided, and by the suction action of the cooling fan, air is concentrated on the outer surface of the bearing from the outer peripheral side of the interval and is sucked from the inlet of the intermediate plate. Cools the intermediate plate and bearings.
【０００４】ところが、前記実開昭６３−１５４７９７
のものは、軸受に対する輻射熱のみを遮るもので、モー
タの前壁に対する遮熱は考慮されておらず、前記実開平
４−５４９９９のものも、冷却空気を軸受に集中させて
いることから、軸受を直接冷却することを主眼とするも
のであり、モータの前壁に沿って流れる空気の流速は遅
いことが明らかで、該前壁に対する冷却作用は少ないと
解される。However, Japanese Utility Model Application Laid-Open No. 63-154797 describes the above.
The above-mentioned one blocks only the radiant heat to the bearing, and does not consider the heat shielding to the front wall of the motor. The main purpose is to directly cool the motor, and it is clear that the flow velocity of the air flowing along the front wall of the motor is slow, and it is understood that the cooling effect on the front wall is small.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、冷却ファン
を使用しない形式の電動ファンにおいて、モータがファ
ン側の熱で加熱されるのを防止することを課題とする。SUMMARY OF THE INVENTION It is an object of the present invention to prevent a motor from being heated by heat of a fan in an electric fan of a type not using a cooling fan.
【０００６】[0006]
【課題を解決するための手段】前記課題の解決手段の第
１は、請求項１に記載したとおり、ファンのケーシング
の背面側に、間隔をあけて羽根車駆動用のモータを取付
けると共に、ケーシングの背面側にモータの冷却用空気
を吸込む吸込穴を備えた電動ファンにおいて、前記間隔
内に設置する導風板に、前記モータの前壁に近接した平
板部と、該平板部からケーシングの背面側に伸びる筒状
部とを設けて、前記前壁と平板部で狭い流入部を形成す
ると共に、筒状部で前記流入部以外に空気を流入させな
いようにしたことを特徴とする。According to a first aspect of the present invention, a motor for driving an impeller is mounted on a rear side of a casing of a fan with an interval, and a casing is provided. An electric fan having a suction hole for sucking cooling air for a motor on the back side of a motor, wherein a wind guide plate installed in the space includes a flat plate portion close to a front wall of the motor, and a rear surface of a casing from the flat plate portion. A tubular portion extending to the side is provided, a narrow inflow portion is formed by the front wall and the flat plate portion, and air is prevented from flowing into the tubular portion other than the inflow portion.
【０００７】同じく解決手段の第２は、請求項２に記載
したとおり、請求項１において、平板部とモータの前壁
との間隔を、平板部とケーシングの背面との間隔より小
さくしたことを特徴とする。A second aspect of the present invention is that the distance between the flat plate portion and the front wall of the motor is smaller than the distance between the flat plate portion and the rear surface of the casing. Features.
【０００８】解決手段の第３は、請求項３に記載したと
おり、請求項１において、平板部の内縁とモータの前壁
との間隔で形成される流入部の最下流面積が、ケーシン
グの吸込穴の面積からモータ軸の断面積を減じた面積よ
り大きいことを特徴とする。A third aspect of the present invention, as described in the third aspect, is that, in the first aspect, the most downstream area of the inflow portion formed at the interval between the inner edge of the flat plate portion and the front wall of the motor is equal to the suction pressure of the casing. It is characterized by being larger than the area obtained by subtracting the cross-sectional area of the motor shaft from the area of the hole.
【０００９】解決手段の第４は、請求項４に記載したと
おり、請求項１，２又は３において、平板部の内縁とケ
ーシングの背面とを筒状部で継ないだことを特徴とす
る。According to a fourth aspect of the present invention, as described in claim 4, in claim 1, 2, or 3, the inner edge of the flat plate portion and the back surface of the casing are connected by a tubular portion.
【００１０】解決手段の第５は、請求項５に記載したと
おり、請求項４において、円板部の外縁に複数個の取付
け片を連設し、該取付け片を介して導風板をケーシング
に取付けたことを特徴とする電動ファン。According to a fifth aspect of the present invention, as set forth in the fifth aspect, in the fourth aspect, a plurality of mounting pieces are continuously connected to the outer edge of the disk portion, and the air guide plate is connected to the casing via the mounting pieces. An electric fan characterized by being attached to a fan.
【００１１】[0011]
【作用】請求項１の手段によれば、外部の空気は、狭い
流入部を高速で流れるため、該流入部の両面と空気の単
位容積当りの接触面積が大きく、吸熱作用すなわち冷却
作用が大きい。According to the first aspect of the present invention, since the external air flows at a high speed through the narrow inflow portion, the contact area per unit volume of the air with both surfaces of the inflow portion is large, and the heat absorbing action, that is, the cooling action is large. .
【００１２】また、請求項２の手段によれば、流入部を
狭くすることにより平板部がケーシングから遠くなり、
ケーシングから平板部に至る輻射熱は少なくなる。According to the second aspect of the present invention, by narrowing the inflow portion, the flat plate portion becomes far from the casing,
Radiation heat from the casing to the flat portion is reduced.
【００１３】請求項３の手段によれば、空気流は、吸込
穴に至るまでに絞り作用を受けず、吸込穴で初めて絞り
作用を受けるから、抵抗が少なく大量の空気を流通させ
ることができる。According to the third aspect of the present invention, the air flow is not subjected to the restricting action until reaching the suction hole, and is subjected to the restricting action for the first time in the suction hole. .
【００１４】請求項４の手段によれば、平板部を通過し
た冷却空気は、筒状部で案内されて滞留することなく高
速で流れ、その際モータを直接冷却する。According to the fourth aspect of the present invention, the cooling air that has passed through the flat plate portion is guided by the cylindrical portion and flows at a high speed without stagnation, at which time the motor is directly cooled.
【００１５】請求項５の手段によれば、導風板をその外
周に連設した複数個の取付片でケーシングに取付けたの
で、取付けが確実になされると共に取付片によって通気
を阻害することがない。According to the fifth aspect of the present invention, the baffle plate is attached to the casing by a plurality of attachment pieces continuously provided on the outer periphery thereof, so that the attachment is reliably performed and ventilation is hindered by the attachment pieces. Absent.
【００１６】[0016]
【実施例】以下、図面を参照した本発明の実施例を説明
する。図１〜図２において、１は本発明の電動ファン、
２はこれに用いるファン、３は該ファン２の羽根車駆動
用のモータである。この電動ファン１は、例えば給湯器
において、燃焼用空気をバーナへ送出するために用いら
れ、該燃焼用空気は、給気筒と排気筒が内外同軸の二重
筒とされている吸排気部の給気筒を通る際に、排気筒を
通る高温の排気と熱交換されて１１０〜１２０℃程度に
加熱されている。Embodiments of the present invention will be described below with reference to the drawings. 1 and 2, reference numeral 1 denotes an electric fan of the present invention,
Reference numeral 2 denotes a fan used for this, and reference numeral 3 denotes a motor for driving the impeller of the fan 2. This electric fan 1 is used for sending out combustion air to a burner in, for example, a water heater, and the combustion air is supplied to an intake / exhaust section in which a supply cylinder and an exhaust cylinder are coaxial double cylinders. When passing through the air supply cylinder, the heat is exchanged with high-temperature exhaust gas passing through the exhaust cylinder, and is heated to about 110 to 120 ° C.
【００１７】ファン２は、渦巻形のケーシング４とシロ
ッコ型の羽根車５を備えるもので、ケーシング４の前面
の中心には吸気口６が開口し、バーナへつながる排気口
７は接線方向に向けられている。ケーシング４の背面側
にはモータ３との間に間隔８が設けられ、該ケーシング
４にはその背面部を形成する背面板９と、冷却空気を案
内する導風板１０がねじ１１によってに固定される。The fan 2 includes a spiral casing 4 and a sirocco impeller 5. An intake port 6 is opened at the center of the front surface of the casing 4, and an exhaust port 7 connected to the burner is directed tangentially. Have been. On the back side of the casing 4, a gap 8 is provided between the casing 4 and the motor 3. The casing 4 has a back plate 9 forming a back portion thereof and a baffle plate 10 for guiding cooling air fixed by screws 11. Is done.
【００１８】背面板９は、図３〜４に示すように、中心
に吸込穴１２とその周囲にリング状の凸部１３が設けら
れ、外周側にモータ取付け用のねじ穴１４と、前記ねじ
１１が通過する穴１５とが３個ずつ設けられており、該
穴１５の両側に位置決め突起１６が突設されている。As shown in FIGS. 3 and 4, the rear plate 9 is provided with a suction hole 12 at the center and a ring-shaped convex portion 13 around the hole, and a screw hole 14 for mounting a motor on the outer peripheral side. Three holes 15 through which the holes 11 pass are provided, and three positioning projections 16 are provided on both sides of the holes 15.
【００１９】導風板１０は、図５〜６に示すように、外
縁１７1と内縁１７2をもつリング状の平板部１７と、該
平板部１７の内縁１７2からケーシング４に向かう筒状
部１８、該筒状部１８の端部から伸びる内フランジ１
９、そして中心穴２０が連設されており、平板部１７の
外縁１７1には３個のＬ字形の取付け片２１が連設さ
れ、該取付け片２１には前記ねじ１１が挿通される穴２
２が設けられる。The air guide plate 10, as shown in Figures 5-6, the outer edge 17 1 and the inner edge 17 2 a ring-shaped flat plate portion 17 having a cylindrical shape towards the casing 4 from the inner edge 17 2 of the plate portion 17 Part 18, inner flange 1 extending from the end of cylindrical part 18
9 and hole center hole 20 is continuously provided, the mounting piece 21 of the three L-shaped outer edge 17 1 of the flat plate portion 17 is continuously provided, the mounting piece 21 the screw 11 is inserted, 2
2 are provided.
【００２０】図１〜２で明らかなように、導風板１０の
内フランジ１９と取付け片２１は同一平面上にあり、中
心穴２０が背面板９の凸部１３に嵌合し、取付け片２１
が位置決め突起１６，１６間に位置することで導風板１
０が背面板９に位置決めされ、内フランジ１９が背面板
９に溶接されて組立て体となり、この組立て体がねじ１
１でケーシング４の主体部に固定される。As is apparent from FIGS. 1 and 2, the inner flange 19 of the air guide plate 10 and the mounting piece 21 are on the same plane, and the center hole 20 is fitted into the projection 13 of the back plate 9, and 21
Is located between the positioning projections 16, 16, so that
0 is positioned on the back plate 9 and the inner flange 19 is welded to the back plate 9 to form an assembly.
At 1, it is fixed to the main body of the casing 4.
【００２１】モータ３は、その前壁２５から伸びる突片
２５1を固定部として、スペーサ２３により前記間隔８
を保持してねじ２４で背面板９に固定され、モータ３の
前壁２５及び軸受部２６と導風板１０の間に、外縁１７
1側を流入口とし、吸込穴１２へ通じる通風路２７が形
成され、また導風板１０と背面板９の間には、通風路２
７内とは遮断されて外気に開放している開放空間２９が
形成されている。そして、前壁２５と平板部１７の間の
流入部２７1の幅Ｌ1は、開放空間２９の幅すなわち、筒
状部１８の高さＬ2、又は間隔８の幅Ｌ3よりかなり小さ
くされ、好ましくはＬ2の２分の１程度とされる。The motor 3 has a protrusion 25 1 extending from the front wall 25 as a fixed portion, and the spacer 8
And is fixed to the back plate 9 with screws 24, and between the front wall 25 and the bearing portion 26 of the motor 3 and the air guide plate 10, the outer edge 17.
A ventilation path 27 is formed on one side as an inflow port, and communicates with the suction hole 12. A ventilation path 2 is provided between the baffle plate 10 and the back plate 9.
An open space 29 is formed, which is shut off from the inside and is open to the outside air. The width L 1 of the inflow portion 27 1 between the front wall 25 and the flat plate portion 17 is considerably smaller than the width of the open space 29, that is, the height L 2 of the cylindrical portion 18 or the width L 3 of the interval 8. , Preferably about half of L 2 .
【００２２】これにより、流入部２７1の幅Ｌ1を狭くす
ると共に開放空間２９の幅すなわち筒状部１８の幅Ｌ2
を大きくでき、流入部２７1の狭い幅Ｌ1を通る空気の流
速を大にして充分な冷却作用を行なわせることができ、
また、開放空間２９の広い幅Ｌ2によりファン２側から
平板部１７に至る輻射熱量を可及的に減少させることが
できる。As a result, the width L 1 of the inflow portion 27 1 is reduced, and the width of the open space 29, that is, the width L 2 of the cylindrical portion 18 is reduced.
The large can, the flow rate of air through the narrow L 1 of the inflow part 27 1 can be made sufficient cooling effect in the large,
Also, the width L 2 of the open space 29 may be reduced radiant heat amount reaching from the fan 2 side flat plate portion 17 as much as possible.
【００２３】そして、モータ軸２８には、吸込穴１２を
通ってケーシング４内に伸び羽根車５が固定されてい
る。吸込穴１２の内径は、該吸込穴１２とモータ軸２８
との間に形成される流路、すなわち吸込穴１２の面積か
らモータ軸２８の断面積を減じた面積に所要量の冷却空
気が流れると共にファン２からモータ側に至る輻射熱の
通過量が少ないように決められる。The impeller 5 is fixed to the motor shaft 28 and extends through the suction hole 12 into the casing 4. The inner diameter of the suction hole 12 is different from that of the suction hole 12 by the motor shaft 28.
, The required amount of cooling air flows through the area obtained by subtracting the cross-sectional area of the motor shaft 28 from the area of the suction hole 12, and the amount of radiant heat passing from the fan 2 to the motor side is reduced. Is decided.
【００２４】モータ３は、その内部に前壁２５の内面に
近接して電装基板３０が設置され、ここにモータ制御用
の電子部品群３１が配置されている。In the motor 3, an electric board 30 is installed close to the inner surface of the front wall 25, and an electronic component group 31 for motor control is arranged here.
【００２５】モータ３を駆動すると、羽根車５が回転
し、燃焼用空気を矢印イのように吸引して矢印ロのよう
にバーナ側へ排出し、またケーシング４内の負圧によ
り、ケーシング４の背面側でも外気が矢印Ａ，Ｂのよう
に吸引される。そして前記燃焼用空気が熱いとファン２
が加熱され、その輻射熱が背面板９側からモータ３に放
射されるが、導風板１０の平板部１７は、遮熱板として
機能すると共に幅Ｌ1が小さいため、流入部２７1を流れ
る空気は、狭い幅を高速で通過し、空気の単位容積当り
のモータ前壁２５と平板部１７に対する接触面積が大き
いから、単位容積当りの冷却作用が大で、前壁２５の過
熱が防止される。そして、筒状部１８に案内されて流出
部２７2で軸受部２６とモータ軸２８を集中的に冷却し
たのち吸込穴１２からファン１内に吸込まれ、吸気口６
から入る熱気に合流して矢印ロ方向に排出される。When the motor 3 is driven, the impeller 5 rotates, and the combustion air is sucked as shown by the arrow A and discharged to the burner side as shown by the arrow B. The negative pressure in the casing 4 causes the casing 4 to rotate. The outside air is also sucked as indicated by arrows A and B also on the back side of. When the combustion air is hot, the fan 2
There is heated, its radiant heat is emitted to the motor 3 from the back plate 9 side, the flat plate portion 17 of the air guide plate 10, because of their small width L 1 functions as a heat shield plate, through the inlet 27 1 Since the air passes through the narrow width at a high speed and the contact area between the motor front wall 25 and the flat plate portion 17 per unit volume of air is large, the cooling action per unit volume is large, and the overheating of the front wall 25 is prevented. You. After being guided by the cylindrical portion 18 and intensively cooling the bearing portion 26 and the motor shaft 28 at the outflow portion 27 2, it is sucked into the fan 1 from the suction hole 12, and
Merges with the hot air coming in from below and is discharged in the direction of arrow B.
【００２６】前壁２５のうち、特に平板部１７と対向す
る部分は、前記のように強い冷却作用を受けるから、該
部分の内側に取付けられた電子部品群３１は効果的に冷
却される。Since the part of the front wall 25 which opposes the flat plate part 17 receives the strong cooling action as described above, the electronic component group 31 mounted inside the part is effectively cooled.
【００２７】このように筒状部１８があるので、冷却空
気は、すべて流入部２７1と筒状部１８を通って吸入さ
れ、また、筒状部１８が平板部１７の内縁１７2から延
設されているので、冷却空気は、平板部１７から筒状部
１８に案内され、滞留することなく高速で流れて吸込穴
１２からファン２内に吸込まれ、また開放空間２９内の
温められた空気が短絡的に吸込穴１２に吸込まれること
がないから、冷却は有効に行なわれる。The extension The drop in the cylindrical portion 18, the cooling air are all sucked through the inlet 27 1 and the cylindrical portion 18, also from the inner edge 17 2 of the cylindrical portion 18 is a flat plate portion 17 Since the cooling air is provided, the cooling air is guided from the flat plate portion 17 to the cylindrical portion 18, flows at a high speed without stagnation, is sucked into the fan 2 from the suction hole 12, and is heated in the open space 29. Since air is not sucked into the suction holes 12 in a short-circuit manner, cooling is effectively performed.
【００２８】そして、前記通風路２７において、流入部
２７1の内周側すなわち平板部１７の内縁１７2部分にお
ける流通面積は、吸込穴１２とモータ軸２８との間の流
通面積より大きくされており、吸込穴１２に至るまでは
絞り作用を受けないため適量の空気の流入を可能にし、
吸込穴１２内ではその流通面積が有効に働いて最高速で
流れるため、ファン２に近く高温になり易いモータ軸２
８を効果的に冷却することができる。[0028] Then, in the air passage 27, flow area at the inner edge 17 second portion of the inlet 27 1 of the inner peripheral side, that is the flat plate portion 17 is larger than the flow area between the suction ports 12 and the motor shaft 28 Since it does not receive the throttle action until it reaches the suction hole 12, it allows an appropriate amount of air to flow in,
In the suction hole 12, the flow area thereof works effectively and flows at the highest speed.
8 can be cooled effectively.
【００２９】前記のように、流入部２７1を空気が高速
で通過することにより冷却作用が効果的に行なわれ、モ
ータ３の前壁２５の冷却がなされるから、軸受部２６の
昇温も間接的に抑制する作用が生じ、空気流で軸受部２
６を直接冷却する作用と相まって軸受部の過熱も防止さ
れる。そして、前壁２５の冷却により、内部の電装基板
３０1、電子部品群３１等の過熱も防止される。[0029] As described above, the cooling effect by the air passes at high speed inlet 27 1 is effectively carried out, because the cooling of the front wall 25 of the motor 3 is performed, also Atsushi Nobori of the bearing section 26 The effect of indirect suppression occurs, and the bearing 2
6, the overheating of the bearing portion is also prevented. By cooling the front wall 25, the overheating of the internal electrical board 30 1 , the electronic component group 31, and the like is also prevented.
【００３０】なお、前記実施例においては、モータ３と
して前壁２５から軸受部２６が突出した構造のものを示
したが、前壁２５が平坦で軸受部を前壁２５の内側に設
けた構造のモータを用いてもよく、この場合は、平板部
１７の内縁１７2及び筒状部１８の内径を小さくして吸
込穴１２の内径に近付け、筒状部１８内で滞留が生じな
いようにする。これにより、前記実施例と同様に前壁及
びモータ軸の冷却が充分に行なわれると共に、ファン２
からモータの前壁に至る輻射熱を低く抑えることができ
る。In the above embodiment, the motor 3 has a structure in which the bearing 26 projects from the front wall 25. However, the motor 3 has a structure in which the front wall 25 is flat and the bearing is provided inside the front wall 25. It may be used for the motor, in this case, close to the inner diameter of the suction holes 12 by reducing the inner diameter of the inner edge 17 2 and the cylindrical portion 18 of the flat plate portion 17, so that the residence does not occur in the tubular portion 18 I do. As a result, the front wall and the motor shaft are sufficiently cooled in the same manner as in the previous embodiment, and the fan 2 is cooled.
Radiant heat from the motor to the front wall of the motor can be kept low.
【００３１】また、前記実施例では、平板部１７と筒状
部１８を一体の部材で形成しているが、両部分は別体で
作られてよく、筒状部１８の直径を内縁１７2の直径よ
り大きくしてもよい。しかし、筒状部１８を大径にする
と、ここでの流速が低下し冷却性が低下するので、内縁
１７2の直径と略同一にするのが好ましい。In the above embodiment, the flat plate portion 17 and the cylindrical portion 18 are formed as an integral member. However, both portions may be formed separately, and the diameter of the cylindrical portion 18 may be adjusted to the inner edge 17 2. May be larger than the diameter. However, when the cylindrical portion 18 to the large diameter, since here the flow velocity at the reduced cooling performance is lowered, preferably substantially the same as the inner edge 17 second diameter.
【００３２】また、開放空間２９内の空気は、ケーシン
グ４で加熱されており、これを流入部２７1から吸込む
と冷却作用が低下するので、この空気の吸込みが生じ易
い部分に吸込みを阻止する遮板を設けるか、又は平板部
１７の外縁１７1の直径をモータ３の直径より大きくし
て、モータ３の外周面側の加熱されていない空気を流入
させるようにすればよい。この場合取付片２１の屈曲方
向は内向きにすることができる。Further, the air in the open space 29 is heated by the casing 4, so this suck the cooling effect from the inflow portion 27 1 is reduced, to prevent suction to easily part suction occurs in the air or providing the shielding plate, or the edge 17 1 of the diameter of the flat plate portion 17 and larger than the diameter of the motor 3, it may be caused to flow into the air not heated of the outer peripheral surface side of the motor 3. In this case, the bending direction of the mounting piece 21 can be inward.
【００３３】[0033]
【発明の効果】以上のように、請求項１の手段によれ
ば、導風板の平板部をモータの前壁に近接して設けて狭
い流入部を形成すると共に、筒状部を設けて該流入部の
みに冷却空気を流すという簡単な手段で、前記流入部を
通る空気を高速で通過させることができるため、空気の
単位容積当りの接触面積が大で冷却作用が高く、これに
よりモータの昇温を防止できる利点を有する。As described above, according to the first aspect of the present invention, the flat portion of the baffle plate is provided close to the front wall of the motor to form a narrow inflow portion, and the tubular portion is provided. Since the air passing through the inflow portion can be passed at a high speed by a simple means of flowing the cooling air only to the inflow portion, the contact area per unit volume of air is large, and the cooling action is high, so that the motor This has the advantage that the temperature rise can be prevented.
【００３４】次に請求項２の手段によれば、流入部を狭
くして空気が高速で流入するのを可能にすると共に、平
板部の位置をケーシングから遠くしてケーシングから出
る輻射熱で平板部が加熱されるのを減少できる効果があ
る。According to the second aspect of the present invention, the inflow portion is narrowed to allow air to flow in at a high speed, and the position of the flat plate portion is made farther from the casing, so that the flat plate portion is radiated from the casing. Has the effect of reducing heating.
【００３５】請求項３の手段によれば、空気流は、吸込
穴に至るまでは絞り作用を受けず、吸込穴で初めて絞り
作用を受けるから、抵抗が少なく大量の空気を流通させ
ることができ、モータに対する冷却効果が高い。According to the third aspect of the present invention, since the air flow is not subjected to the throttle action until reaching the suction hole and is first subjected to the throttle action in the suction hole, a large amount of air can be circulated with low resistance. The cooling effect on the motor is high.
【００３６】請求項４の手段によれば、平板部を通過し
た冷却空気は、筒状部で案内されて滞留することなく高
速で流れるから、モータを効果的に冷却できる利点があ
る。According to the fourth aspect of the present invention, since the cooling air that has passed through the flat plate portion flows at a high speed without being stagnated by being guided by the cylindrical portion, there is an advantage that the motor can be effectively cooled.
【００３７】また請求項５の手段によれば、導風板をそ
の外縁に連設した複数個の取付片で固定するので、構造
が簡単であると共に取付けが確実であり、取付片によっ
て空気の流入を阻害することもないので充分な量の冷却
空気を導入できる利点を有する。According to the fifth aspect of the present invention, the baffle plate is fixed by the plurality of mounting pieces connected to the outer edge thereof, so that the structure is simple and the mounting is reliable, and the air flow is prevented by the mounting pieces. There is an advantage that a sufficient amount of cooling air can be introduced without obstructing the inflow.
【図１】 本発明の実施例の縦断面図FIG. 1 is a longitudinal sectional view of an embodiment of the present invention.
【図２】 同上背面図FIG. 2 is a rear view of the same.
【図３】 背面板の正面図FIG. 3 is a front view of a rear plate.
【図４】 図３の4-4線断面図FIG. 4 is a sectional view taken along line 4-4 of FIG.
【図５】 導風板の正面図FIG. 5 is a front view of the air guide plate.
【図６】 図５の6-6線断面図FIG. 6 is a sectional view taken along line 6-6 of FIG.
２ ファン ３ モータ ４ ケーシング ５ 羽根車 ９ 背面板 １０ 導風板 １７ 平板部 １８ 筒状部 ２５ モータ前壁 ２６ 軸受部 ２７ 通風路 ２７1 流入部Reference Signs List 2 fan 3 motor 4 casing 5 impeller 9 back plate 10 wind guide plate 17 flat plate portion 18 tubular portion 25 motor front wall 26 bearing portion 27 ventilation passage 27 1 inflow portion
Claims (5)
側に、間隔（８）をあけて羽根車駆動用のモータ（３）
を取付けると共に、ケーシング（４）の背面側にモータ
（３）の冷却用空気を吸込む吸込穴（１２）を備えた電
動ファンにおいて、前記間隔（８）内に設置する導風板
（１０）に、前記モータ（３）の前壁（２５）に近接し
た平板部（１７）と、該平板部（１７）からケーシング
（４）の背面側に伸びる筒状部（１８）とを設けて、前
記前壁（２５）と平板部（１７）で狭い流入部（２
７1）を形成すると共に、筒状部（１８）で前記流入部
（２７1）以外に空気を流入させないようにしたことを
特徴とする電動ファン。1. A motor (3) for driving an impeller at a space (8) behind a casing (4) of a fan (2).
In the electric fan provided with a suction hole (12) for sucking cooling air for the motor (3) on the rear side of the casing (4), the air guide plate (10) installed in the space (8) is provided. A flat portion (17) proximate to a front wall (25) of the motor (3); and a tubular portion (18) extending from the flat portion (17) to the rear side of the casing (4). A narrow inflow section (2) between the front wall (25) and the flat section (17)
7 1) to form a electric fan being characterized in that so as not to flow into the air in addition to the inlet (27 1) in the tubular portion (18).
ータ（３）の前壁（２５）との間隔を、平板部（１７）
とケーシング（４）の背面との間隔より小さくしたこと
を特徴とする電動ファン。2. The distance between the flat portion (17) and the front wall (25) of the motor (3) according to claim 1,
An electric fan characterized in that the distance is smaller than the distance between the casing and the rear surface of the casing (4).
縁（１７2）とモータ（３）の前壁（２５）との間隔で
形成される流入部（２７1）の最下流面積が、ケーシン
グ（４）の吸込穴（１２）の面積からモータ軸（２８）
の断面積を減じた面積より大きいことを特徴とする電動
ファン。3. The most downstream area of the inflow portion (27 1 ) formed at the interval between the inner edge (17 2 ) of the flat plate portion (17) and the front wall (25) of the motor (3). The motor shaft (28) from the area of the suction hole (12) of the casing (4).
An electric fan characterized by having an area larger than the area obtained by reducing the cross-sectional area of the electric fan.
（１７）の内縁（１７2）とケーシング（４）の背面と
を筒状部（１８）で継ないだことを特徴とする電動ファ
ン。4. The electric motor according to claim 1, wherein an inner edge (17 2 ) of the flat plate portion (17) and a back surface of the casing (4) are connected by a tubular portion (18). fan.
縁（１７1）に複数個の取付け片（２１）を連設し、該
取付け片（２１）を介して導風板（１０）をケーシング
（４）に取付けたことを特徴とする電動ファン。5. The disk guide (10) according to claim 4, wherein a plurality of mounting pieces (21) are connected to the outer edge (17 1 ) of the disk portion (17), and the air guide plate (10) is connected via the mounting pieces (21). ) Is attached to the casing (4).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6237557A JP2838658B2 (en) | 1994-09-30 | 1994-09-30 | Electric fan |
| KR1019950021467A KR0140252B1 (en) | 1994-09-30 | 1995-07-20 | Electric fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6237557A JP2838658B2 (en) | 1994-09-30 | 1994-09-30 | Electric fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08100798A JPH08100798A (en) | 1996-04-16 |
| JP2838658B2 true JP2838658B2 (en) | 1998-12-16 |
Family
ID=17017090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6237557A Expired - Lifetime JP2838658B2 (en) | 1994-09-30 | 1994-09-30 | Electric fan |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2838658B2 (en) |
| KR (1) | KR0140252B1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1306896C (en) * | 2004-10-27 | 2007-03-28 | 金骏达电机制造厂有限公司 | Method for forming metal dust-collecting assembly driven by micromotor and its connecting structure |
| JP2008280928A (en) * | 2007-05-10 | 2008-11-20 | Denso Corp | Blower |
| WO2011076030A1 (en) * | 2009-12-25 | 2011-06-30 | 中山大洋电机制造有限公司 | Blower structure |
| CN102538174B (en) * | 2012-03-01 | 2014-06-11 | 艾欧史密斯(中国)热水器有限公司 | Low-noise gas instantaneous water heater |
| JP5884844B2 (en) | 2014-02-21 | 2016-03-15 | 株式会社ノーリツ | Water heater |
| JP7162512B2 (en) * | 2018-12-04 | 2022-10-28 | リンナイ株式会社 | centrifugal fan |
-
1994
- 1994-09-30 JP JP6237557A patent/JP2838658B2/en not_active Expired - Lifetime
-
1995
- 1995-07-20 KR KR1019950021467A patent/KR0140252B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08100798A (en) | 1996-04-16 |
| KR960011158A (en) | 1996-04-20 |
| KR0140252B1 (en) | 1998-07-01 |
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