WO2010125735A1 - 天井埋込形換気扇 - Google Patents
天井埋込形換気扇 Download PDFInfo
- Publication number
- WO2010125735A1 WO2010125735A1 PCT/JP2010/001783 JP2010001783W WO2010125735A1 WO 2010125735 A1 WO2010125735 A1 WO 2010125735A1 JP 2010001783 W JP2010001783 W JP 2010001783W WO 2010125735 A1 WO2010125735 A1 WO 2010125735A1
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- WIPO (PCT)
- Prior art keywords
- blade
- casing
- ceiling
- ventilation fan
- centrifugal blower
- Prior art date
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
- F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
- F24F7/065—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit fan combined with single duct; mounting arrangements of a fan in a duct
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2221/00—Details or features not otherwise provided for
- F24F2221/14—Details or features not otherwise provided for mounted on the ceiling
Definitions
- the present invention relates to a ceiling-embedded ventilation fan.
- FIG. 9 is an installation cross-sectional view of a conventional ceiling-embedded ventilation fan.
- the ceiling-embedded ventilation fan includes a box-shaped frame 104, an adapter 106, a casing 108, a centrifugal blower blade 109, and an electric motor 110.
- the box-shaped frame 104 has a suction port 102 covered with the grill 101 on the lower surface and a discharge port 103 on the side surface.
- the adapter 106 connects the duct 105 communicating with the outdoors.
- the casing 108 has a scroll shape having an orifice 107 as a suction port on the lower surface inside the frame 104.
- Centrifugal blower blade 109 is arranged in casing 108 and blows air.
- the electric motor 110 rotationally drives the centrifugal blower blade 109.
- the ceiling-embedded ventilation fan of the present invention has a casing suction port on the lower surface and a casing discharge port on the side in a box-shaped frame that is inserted into the ceiling and attached to the lower surface and faces the indoor side. And a casing disposed with the scroll-shaped side face in the vertical direction, a centrifugal blower blade having a blade suction port that is enclosed in the casing and faces the casing suction port, and an electric motor that rotationally drives the centrifugal blower blade.
- the centrifugal blower blade is provided so that the upper side of the axial center is inclined in a direction approaching the upstream side of the centrifugal blower flow with reference to the center line in the direction perpendicular to the casing discharge port in the casing suction port.
- the expansion rate of the air passage width increases from the blade suction port side to the side opposite to the blade suction port in the inner peripheral area of the casing. Therefore, at high static pressure, the air permeability at high static pressure is improved on the side opposite to the suction port side where the air permeability is lower than the blade suction port side, and the air permeability can be improved over the entire blade. As a result, the air volume can be secured in the use of a wide area from the low static pressure to the high static pressure, and the noise value is not increased.
- the expansion rate of the air passage width is an increase rate of the distance from the discharge side peripheral side surface of the centrifugal blower blade to the inner peripheral side surface of the casing.
- FIG. 1 is an installation sectional view showing a ceiling-embedded ventilation fan according to a first embodiment of the present invention.
- FIG. 2 is a side view of the ceiling-embedded ventilation fan viewed from the casing outlet side.
- FIG. 3 is a bottom view showing the inside of the frame of the ceiling-embedded ventilation fan.
- FIG. 4 is a side view of the power supply connecting portion of the ceiling-embedded ventilation fan as viewed from the insertion port side.
- FIG. 5 is a perspective view seen from the power supply connection side of the ceiling-embedded ventilation fan.
- FIG. 6 is a graph showing the air volume-static pressure characteristics and the noise-static pressure characteristics in front of the ceiling-embedded ventilation fan.
- FIG. 7 is a side view seen from the casing outlet side of the ceiling-embedded ventilation fan according to the second embodiment of the present invention.
- FIG. 8 is a graph showing the air volume-static pressure characteristics and the noise-static pressure characteristics in front of the ceiling-embedded ventilation fan.
- FIG. 9 is a cross-sectional view of a conventional ceiling-embedded ventilation fan.
- FIG. 1 is an installation sectional view showing a ceiling-embedded ventilation fan according to a first embodiment of the present invention.
- the ceiling-embedded ventilation fan includes a casing 6, a centrifugal blower blade 8, and an electric motor 9 in a frame 3.
- the frame 3 is inserted and attached to the ceiling 30 and has a box shape having the adapter 2 and the opening 13.
- the adapter 2 is connected to the side of the frame 3 with a duct 1 communicating with the outdoors.
- the opening 13 is on the lower surface of the frame 3 toward the indoor side.
- the casing 6 includes a casing suction port 4 provided on the lower surface of the frame 3, a casing discharge port 5 provided on a side portion of the frame 3, and a scroll-like side surface 6 a.
- the centrifugal blower blade 8 is included in the casing 6 and has a blade suction port 7 facing the casing suction port 4.
- the electric motor 9 rotationally drives the centrifugal blower blade 8.
- the casing 6 is arranged with the scroll-shaped side surface 6a facing the vertical direction.
- FIG. 2 is a side view seen from the casing discharge port side of the ceiling-embedded ventilation fan according to the first embodiment of the present invention
- FIG. 3 is a bottom view showing the inside of the frame of the ceiling-embedded ventilation fan.
- the centrifugal blower blade 8 is provided by inclining the upper side of the shaft center 10 in a direction approaching the upstream side of the centrifugal blower flow with reference to the center line 11 in the direction orthogonal to the casing discharge port 5 in the casing suction port 4. ing.
- the side of the tongue portion 14 is set to the scroll-shaped start, and the end of the centrifugal blower flow in the flow direction of the centrifugal blower blade 8 is set to the end of the winding.
- the centrifugal blower blade 8 is inclined so that the upper side thereof is away from the winding end side with respect to the center line 11.
- the inclination is such that the center point of the vertical length of the centrifugal fan blade 8 in the axis 10 is the inclination base point 31. That is, the upper side from the base point 31 of the shaft center 10 is inclined toward the upstream side of the centrifugal blast flow and the lower side toward the downstream side in the direction approaching the center line 11.
- the upstream side of the centrifugal blast flow is below the center line 11 where a large amount of air in the casing suction port 4 in FIG. 3 is sucked, and the downstream side is the end side in the flow direction of the centrifugal blast flow by the centrifugal blast blades 8. .
- this inclination causes the axis 10 to be inclined in the direction of the tangent 15 in the tongue portion 14 located at the shortest distance from the inclination base point 31 of the axis 10, and the inclination angle 32 ranges from 3 degrees to 10 degrees. It is said.
- the shaft center 10 is inclined such that at least a part of the blade suction port side end portion 16 of the centrifugal blower blade 8 is visible from the casing discharge port 5. .
- the centrifugal blower blade 8 has a blade group formed by arranging a plurality of blades on the circumferential side as a suction port side blade group 17 having a high air flow characteristic at the time of high static pressure on the blade suction port 7 side. Yes.
- the side opposite to the blade suction port 7 is the anti-suction port side blade group 18 having a high air flow characteristic at low static pressure, and the suction port side blade group 17 and the anti-suction port side blade group 18 are connected. . Therefore, the air permeability from the time of high static pressure to the time of low static pressure is further improved. As a result, air volume characteristics and noise characteristics are further improved from low static pressure to high static pressure.
- the high static pressure is, for example, a state of 50 Pa or higher
- the low static pressure is, for example, a state of 30 Pa or lower.
- the high air volume characteristic means that the air permeability is good and the air volume is large even if the rotation speed of the electric motor 9 is the same.
- FIG. 4 is a side view of the power supply connecting portion of the ceiling-embedded ventilation fan according to the first embodiment of the present invention as viewed from the insertion port side
- FIG. 5 is a perspective view of the power supply connecting portion of the ceiling-embedded ventilation fan.
- the electric motor 9 to which the centrifugal blower blade 8 is fixed is attached correspondingly so that the centrifugal blower blade 8 is inclined.
- the top surface portion 3 a of the frame 3 is formed perpendicular to the axis 10 of the centrifugal blower blade 8.
- the top surface 3a is provided with a motor mounting plate 20 for mounting the motor 9 and a boss 21 having a screw hole (not shown) into which a fixing screw (not shown) is screwed.
- the fixing screw fixes the casing 6 from within the frame 3.
- the screw hole of the boss portion 21 is formed in the vertical direction without corresponding to the inclination of the top surface portion 3a.
- a power supply connection portion 23 is inserted into the electric motor mounting plate 20 and connected to be electrically connected through the insertion port 22, and is fixed to the electric motor mounting plate 20 with the insertion port 22 facing obliquely downward along the inclination of the top surface portion 3 a. Has been.
- the downstream area of the centrifugal blast flow with respect to the center line 11 on the inner peripheral side of the side surface 6a has a great influence on the blast performance.
- the expansion rate of the air passage width B shown in FIG. 3, which is an increase rate of the distance from the discharge side peripheral side surface of the centrifugal blower blade 8 to the inner peripheral side surface of the casing 6, is the blade suction. It increases from the mouth 7 side to the opposite side of the blade suction port 7. Therefore, in the centrifugal blower in which the main flow of wind tends to flow to the blades on the blade suction port 7 side at high static pressure, the expansion rate of the air passage width becomes larger on the blade side opposite to the blade suction port 7. As a result, the flow easily flows into the blade on the side opposite to the blade suction port 7 to improve the air permeability, and the air permeability is improved over the entire blade.
- the center point of the vertical length of the axial center 10 of the centrifugal blower blade 8 is set as a tilt base point 31. Therefore, the upward increase and the downward decrease in the enlargement ratio of the air passage width B of the centrifugal blower blade 8 are not biased to one side. As a result, generally, from the time of low static pressure where the main flow of wind mainly flows through the blade on the opposite side of the blade suction port 7 to the time of high static pressure where the main flow of wind flows mainly through the blade on the blade suction port 7 side. Good ventilation.
- the axis 10 is inclined in the direction of the tangent 15 at the position of the tongue portion 14 located at the shortest distance from the inclination base point 31, and the inclination angle 32 is set to 3 to 10 degrees. Therefore, the distance between the discharge-side peripheral side surface of the centrifugal blower blade 8 and the tongue portion 14 is substantially the same from the blade suction port 7 side to the opposite side of the blade suction port 7. As a result, the backflow vortex and the boundary layer are prevented from developing due to separation on the discharge side peripheral side surface of the centrifugal blower blade 8 near the tongue portion 14.
- the turbulence of the wind can be eliminated in the entire region of the tongue portion 14 and the discharge side peripheral side surface of the centrifugal blower blade 8 is not too close to the casing 6 to generate a wind vortex. Therefore, the air volume can be increased without increasing the noise.
- the blade suction side 7 blade is more visible from the casing discharge port 5.
- the air permeability is improved also at the casing discharge port 5.
- the blade suction port 7 side and the opposite side of the blade suction port 7 are divided into blade groups suitable for each. Thereby, the air permeability can be improved from a high static pressure to a low static pressure.
- FIG. 6 is a graph showing the air volume-static pressure characteristic of the ceiling-embedded ventilation fan of the first embodiment of the present invention and the noise-static pressure characteristic of the front surface thereof.
- the embedded ventilation fan improves air permeability on the side opposite to the blade suction port 7 at high static pressure as compared with the conventional one, and the air volume at high static pressure increases. Since this increase in the air volume can be achieved without increasing the rotational speed of the centrifugal blower blade 8, the noise value can be reduced, and the air volume characteristic and the noise characteristic can be maintained even at a low static pressure.
- the fixing screw for fixing the motor mounting plate 20 and the casing 6 is tightened to or removed from the screw hole during maintenance or the like, the screw hole faces the vertical direction even if the top surface portion 3a is inclined. Therefore, the tool can be operated straight upward with respect to the screw hole, and the component can be easily attached and detached.
- FIG. 7 is the side view seen from the casing discharge port side of the ceiling embedded type ventilation fan of Embodiment 2 of this invention.
- the embedded ceiling type ventilation fan according to the second embodiment of the present invention differs from the embedded ceiling type ventilation fan according to the first embodiment in the following points. That is, the blade group formed by arranging the plurality of blades on the circumferential side of the centrifugal blower blade 8a is a high static pressure blade group 24 composed of one type of blade having high air flow characteristics at high static pressure. Is different.
- the other components are the same, and are denoted by the same reference numerals and description thereof is omitted.
- the centrifugal blower blade 8a is composed of one kind of high static pressure blade group 24 having high air flow characteristics at high static pressure. Yes. As a result, the air permeability is further improved at high static pressure, so that the air volume characteristic and noise characteristic at high static pressure are further improved.
- FIG. 8 is a graph showing the air volume-static pressure characteristics and noise-static pressure characteristics in front of the ceiling-embedded ventilation fan according to the second embodiment of the present invention. As shown in FIG. 8, the air volume characteristic and the noise characteristic in the high static pressure region are greatly improved.
- the wind passage width is increased, so that the wind easily flows on the opposite side of the blade suction port 7a.
- the air volume can be maintained and the noise is reduced in the region where the static pressure is higher than a certain static pressure in the low static pressure region. That is, since the ceiling-mounted ventilation fan is connected to the duct 1 piped behind the ceiling to ventilate, a certain amount of resistance loss occurs in the installed state.
- This actual use state is shown in FIG. 8 as an actual use low static pressure region, indicating that there is no trouble in use.
- the ceiling-embedded ventilation fan according to the second embodiment of the present invention can provide a ceiling-embedded ventilation fan that is most suitable for use with particular emphasis on high static pressure.
- the present invention can be widely applied to a ventilation device, a centrifugal blower, an air conditioner and the like that ventilate through piped ducts.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Devices For Blowing Cold Air, Devices For Blowing Warm Air, And Means For Preventing Water Condensation In Air Conditioning Units (AREA)
Abstract
Description
図1は本発明の実施の形態1の天井埋込形換気扇を示す設置断面図である。図1に示すように天井埋込形換気扇はフレーム3内に、ケーシング6と、遠心送風羽根8と、電動機9とを備えている。ここでフレーム3は天井裏30に挿入して取り付けられ、アダプター2と開口13とを有する箱状である。アダプター2は、フレーム3の側部に屋外と連通するダクト1と接続されている。開口13は、フレーム3の下面に室内側に対している。ケーシング6はフレーム3の下面に設けたケーシング吸込口4と、フレーム3の側部に設けたケーシング吐出口5と、スクロール状の側面6aとを備えている。遠心送風羽根8はケーシング6内に内包され、ケーシング吸込口4に対向する羽根吸込口7を有している。電動機9は、遠心送風羽根8を回転駆動する。そしてケーシング6は、スクロール状の側面6aを鉛直方向に向けて配設されている。
図7は、本発明の実施の形態2の天井埋込形換気扇のケーシング吐出口側から見た側面図である。本発明の実施の形態2の天井埋込形換気扇は、実施の形態1の天井埋込形換気扇に対し、以下の点が異なる。すなわち遠心送風羽根8aが、円周側に複数枚のブレードを配設して形成されるブレード群を、高静圧時に風量特性が高い1種類のブレードからなる高静圧用ブレード群24とした点が異なる。その他の構成要素は同一であり、同一の符号を付してその説明は省略する。
2 アダプター
3 フレーム
3a 天面部
4 ケーシング吸込口
5 ケーシング吐出口
6 ケーシング
6a 側面
7,7a 羽根吸込口
8,8a 遠心送風羽根
9 電動機
10 軸心
11 中心線
13 開口
14 舌部
15 接線
16 羽根吸込口側側端部
17 吸込口側ブレード群
18 反吸込口側ブレード群
20 電動機取付板
21 ボス部
22 挿入口
23 電源接続部
24 高静圧用ブレード群
30 天井裏
31 基点
32 傾斜角度
Claims (9)
- 天井裏に挿入して取り付けられ下面に室内側に臨む開口を有する箱状のフレーム内に前記下面にケーシング吸込口を有し側部にケーシング吐出口を有してスクロール状の側面を鉛直方向にして配設されたケーシングと、
前記ケーシング内に内包され前記ケーシング吸込口に対向する羽根吸込口を有した遠心送風羽根と、
前記遠心送風羽根を回転駆動する電動機とを備え、
前記遠心送風羽根は、軸心の上方側を前記ケーシング吸込口における前記ケーシング吐出口に直交する方向の中心線を基準とした遠心送風流の上流側に近づく方向へ傾斜させて設けられたことを特徴とする天井埋込形換気扇。 - 前記軸心における前記遠心送風羽根の上下方向長さの中心点を前記傾斜の基点としたことを特徴とする請求項1記載の天井埋込形換気扇。
- 前記上下方向中心点から最短距離に位置する舌部における接線の方向に、前記軸心を傾斜させたことを特徴とする請求項2記載の天井埋込形換気扇。
- 前記ケーシング吐出口の正面視時に、前記遠心送風羽根の羽根吸込口側側端部の少なくとも一部が前記ケーシング吐出口から見える状態に前記軸心を傾斜させたことを特徴とする請求項3記載の天井埋込形換気扇。
- 前記軸心の傾斜角度は3度以上10度以下としたことを特徴とする請求項3記載の天井埋込形換気扇。
- 前記遠心送風羽根は、円周側に複数枚のブレードを配設して形成されるブレード群を前記羽根吸込口側を高静圧時に風量特性が高い構成の吸込口側ブレード群とし、前記羽根吸込口と反対側を低静圧時に風量特性が高い構成の反吸込口側ブレード群とし、前記吸込口側ブレード群と前記反吸込口側ブレード群とを連結することを特徴とする請求項1記載の天井埋込形換気扇。
- 前記遠心送風羽根は、円周側に複数枚のブレードを配設して形成されるブレード群を、高静圧時に風量特性が高い1種類のブレードからなる高静圧用ブレード群からなる構成としたことを特徴とする請求項1記載の天井埋込形換気扇。
- 前記軸心に垂直な面に形成された前記フレームの天面部に、前記電動機を取り付ける電動機取付板、および前記ケーシングを固定する固定ねじが螺合するねじ穴を有したボス部を設け、前記ねじ穴は鉛直方向に形成されていることを特徴とする請求項1記載の天井埋込形換気扇。
- 電源電線を挿入口から挿入して導通接続する電源接続部が、前記挿入口を斜め下方に向けて前記電動機取付板に固定されたことを特徴とする請求項8記載の天井埋込形換気扇。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/057,026 US8061985B2 (en) | 2009-04-30 | 2010-03-12 | Ceiling-embedded ventilation fan |
CN201080002058XA CN102089592B (zh) | 2009-04-30 | 2010-03-12 | 顶棚嵌入型换气扇 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2009-110554 | 2009-04-30 | ||
JP2009110554A JP4760950B2 (ja) | 2009-04-30 | 2009-04-30 | 天井埋込形換気扇 |
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WO2010125735A1 true WO2010125735A1 (ja) | 2010-11-04 |
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PCT/JP2010/001783 WO2010125735A1 (ja) | 2009-04-30 | 2010-03-12 | 天井埋込形換気扇 |
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US (1) | US8061985B2 (ja) |
JP (1) | JP4760950B2 (ja) |
CN (1) | CN102089592B (ja) |
WO (1) | WO2010125735A1 (ja) |
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WO2012098882A1 (ja) * | 2011-01-20 | 2012-07-26 | パナソニック株式会社 | 天井埋込形換気扇 |
DE102013015985B4 (de) * | 2013-09-25 | 2016-08-18 | Stego-Holding Gmbh | Lüftereinrichtung |
CN105674432A (zh) * | 2016-03-06 | 2016-06-15 | 孙海潮 | 一种空调室外机 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS6160039U (ja) * | 1984-09-27 | 1986-04-23 | ||
JPH0372245U (ja) * | 1989-11-10 | 1991-07-22 | ||
JPH0926179A (ja) * | 1995-07-10 | 1997-01-28 | Toshiba Corp | ダクト用換気扇 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3201032A (en) * | 1963-10-21 | 1965-08-17 | Gen Electric | Air impeller construction |
JPS6160039A (ja) | 1984-08-31 | 1986-03-27 | Fujitsu Ltd | mB1P符号信号のパリテイビツト同期方式 |
JP2508748B2 (ja) * | 1987-09-02 | 1996-06-19 | 日本電装株式会社 | 空調装置用空気導入装置 |
IT1231773B (it) | 1989-08-03 | 1991-12-21 | Marcella Bardelli | Metodo e dispositivo fotometrico per analisi di campioni trattati con reattivi fluorescenti. |
JP3404858B2 (ja) * | 1994-02-07 | 2003-05-12 | 株式会社デンソー | 遠心多翼送風機 |
JPH09137796A (ja) * | 1995-11-15 | 1997-05-27 | Toto Ltd | 多翼遠心ファン |
JP3839689B2 (ja) | 2001-08-22 | 2006-11-01 | 松下エコシステムズ株式会社 | 換気装置 |
US6711015B2 (en) * | 2002-02-04 | 2004-03-23 | Acer Inc. | Device for cooling CPU chip |
-
2009
- 2009-04-30 JP JP2009110554A patent/JP4760950B2/ja not_active Expired - Fee Related
-
2010
- 2010-03-12 US US13/057,026 patent/US8061985B2/en active Active
- 2010-03-12 CN CN201080002058XA patent/CN102089592B/zh active Active
- 2010-03-12 WO PCT/JP2010/001783 patent/WO2010125735A1/ja active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6160039U (ja) * | 1984-09-27 | 1986-04-23 | ||
JPH0372245U (ja) * | 1989-11-10 | 1991-07-22 | ||
JPH0926179A (ja) * | 1995-07-10 | 1997-01-28 | Toshiba Corp | ダクト用換気扇 |
Also Published As
Publication number | Publication date |
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US20110117831A1 (en) | 2011-05-19 |
US8061985B2 (en) | 2011-11-22 |
CN102089592A (zh) | 2011-06-08 |
CN102089592B (zh) | 2013-12-25 |
JP2010261613A (ja) | 2010-11-18 |
JP4760950B2 (ja) | 2011-08-31 |
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