JP4906555B2 - Sirocco fan and air conditioner - Google Patents
Sirocco fan and air conditioner Download PDFInfo
- Publication number
- JP4906555B2 JP4906555B2 JP2007081325A JP2007081325A JP4906555B2 JP 4906555 B2 JP4906555 B2 JP 4906555B2 JP 2007081325 A JP2007081325 A JP 2007081325A JP 2007081325 A JP2007081325 A JP 2007081325A JP 4906555 B2 JP4906555 B2 JP 4906555B2
- Authority
- JP
- Japan
- Prior art keywords
- scroll
- fan
- sirocco
- sirocco fan
- motor
- 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.)
- Active
Links
- 230000003068 static effect Effects 0.000 claims description 8
- 238000009423 ventilation Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
Images
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
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/02—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal
- F04D17/04—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal of transverse-flow type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/422—Discharge tongues
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/4226—Fan casings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/601—Mounting; Assembling; Disassembling specially adapted for elastic fluid pumps
- F04D29/602—Mounting in cavities
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0018—Indoor units, e.g. fan coil units characterised by fans
- F24F1/0022—Centrifugal or radial fans
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0018—Indoor units, e.g. fan coil units characterised by fans
- F24F1/0033—Indoor units, e.g. fan coil units characterised by fans having two or more fans
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0043—Indoor units, e.g. fan coil units characterised by mounting arrangements
- F24F1/0047—Indoor units, e.g. fan coil units characterised by mounting arrangements mounted in the ceiling or at the ceiling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0043—Indoor units, e.g. fan coil units characterised by mounting arrangements
- F24F1/0057—Indoor units, e.g. fan coil units characterised by mounting arrangements mounted in or on a wall
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
- F24F1/0063—Indoor units, e.g. fan coil units characterised by heat exchangers by the mounting or arrangement of the heat exchangers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
-
- 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
- F24F7/007—Ventilation with forced flow
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2250/00—Geometry
- F05D2250/50—Inlet or outlet
- F05D2250/52—Outlet
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2250/00—Geometry
- F05D2250/70—Shape
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Air-Conditioning Room Units, And Self-Contained Units In General (AREA)
Description
本発明は、騒音を低減し、送風特性を向上させたシロッコファン及び空気調和装置に関する。 The present invention relates to a sirocco fan and an air conditioner that have reduced noise and improved air blowing characteristics.
従来より、シロッコファンにおいては、渦巻状のスクロールから吹き出した空気流の一部が、ファン外部からファン内部に向かって流れる逆流現象が生じることが知られている。逆流が生じると、吸込み空気流と衝突が生じるため、送風量が低下するだけでなく騒音が大きくなる。そこで、かかる逆流現象を抑制するために、スクロールの吸込み口を形成するベルマウスの形状を円周方向の領域に分けて変化させるなどの工夫がなされている(例えば、特許文献1参照)。また、舌部のほかに補助舌部を舌部から突出するように設ける例も提案されている(例えば、特許文献2参照)。 Conventionally, in a sirocco fan, it is known that a reverse flow phenomenon occurs in which a part of the air flow blown from a spiral scroll flows from the outside of the fan toward the inside of the fan. When the reverse flow occurs, a collision with the suction air flow occurs, so that not only the amount of air blown but also the noise increases. Therefore, in order to suppress such a backflow phenomenon, a device has been devised such as changing the shape of the bell mouth forming the scroll suction port into regions in the circumferential direction (see, for example, Patent Document 1). Moreover, the example which provides an auxiliary tongue part so that it may protrude from a tongue part other than a tongue part is also proposed (for example, refer patent document 2).
その一方で、従来のシロッコファンを搭載した空気調和装置においては、所定騒音値におけるシロッコファンの吹出し風量が小さく、熱交換器性能が低下するため、圧縮機の負荷が大きくなり、COP(成績係数)が低下し、またCOP低下を抑制するため、シロッコファンの吹出し風量を大きくすると、騒音値が大きくなり、使用者に不快感を与えるという課題があった。 On the other hand, in a conventional air conditioner equipped with a sirocco fan, the amount of blown air from the sirocco fan at a predetermined noise level is small and the performance of the heat exchanger is reduced. In order to suppress the decrease in COP and increase the blowing air volume of the sirocco fan, there is a problem that the noise level increases and the user feels uncomfortable.
本発明は、上記のような課題に鑑み、所定騒音時の風量を大きく、言い換えると所定風量を得るときの騒音値及び回転数を低減することができるシロッコファン及びそのシロッコファンを備える空気調和装置を提供することを目的とする。
また、本発明の他の目的は、スクロールの形状を工夫することにより、逆流現象を抑制し、所定風量を保持しながら騒音値を低減することにある。
In view of the above-described problems, the present invention provides a sirocco fan capable of increasing the air volume at a predetermined noise level, in other words, reducing the noise value and the rotational speed when obtaining the predetermined air volume, and an air conditioner including the sirocco fan. The purpose is to provide.
Another object of the present invention is to devise the shape of the scroll to suppress the backflow phenomenon and reduce the noise value while maintaining a predetermined air volume.
本発明に係るシロッコファンは、スクロールと、このスクロール内に回転自在に配置され、円筒状に配列された多数の翼を有するファン本体と、このファン本体を回転駆動するモータとを備えるシロッコファンにおいて、
前記スクロールは、渦巻状に形成された外形と、その外形上に略平行な2つの直線部とを有し、前記直線部のうち一方の直線部は前記スクロールの吐出口に接続され、前記モータの回転軸を前記スクロールの舌部に近い方の直線部寄りに位置させることを特徴とする。
A sirocco fan according to the present invention is a sirocco fan that includes a scroll, a fan body that is rotatably disposed in the scroll, and has a large number of blades arranged in a cylindrical shape, and a motor that rotationally drives the fan body. ,
The scroll has a contour which is formed in a spiral shape, and a substantially parallel two straight portions on its outer, one of the straight portions of said straight portion being connected to the discharge port of the scroll, the motor The rotation axis is positioned closer to the straight line portion closer to the tongue portion of the scroll.
本発明によれば、スクロールと、このスクロール内に回転自在に配置され、円筒状に配列された多数の翼を有するファン本体と、このファン本体を回転駆動するモータとを備えるシロッコファンにおいて、スクロールは、渦巻状に形成された外形と、その外形上に略平行な2つの直線部とを有し、前記直線部のうち一方の直線部は前記スクロールの吐出口に接続され、前記モータの回転軸を前記スクロールの舌部に近い方の直線部寄りに位置させることにより、所定騒音時の風量を大きくすることができ、また空気調和装置の場合はCOPを向上させることができる。 According to the present invention, in a sirocco fan comprising a scroll, a fan main body having a large number of blades arranged rotatably in the scroll and arranged in a cylindrical shape, and a motor for rotationally driving the fan main body, It has a contour which is formed in a spiral shape, and two straight portions substantially parallel to the contour of that, one of the straight portions of said straight portion being connected to the discharge port of the scroll, the motor By positioning the rotary shaft closer to the straight line portion closer to the tongue of the scroll, the air volume at the time of predetermined noise can be increased, and in the case of an air conditioner, COP can be improved.
以下、本発明の実施の形態について図面を参照して説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
実施の形態1.
図1は本発明の実施の形態1におけるシロッコファンを具備する空気調和装置の室内ユニットの内部構成を示す模式的な平面図(a)と側面図(b)である。
図1において、10は室内空調機を構成する室内ユニットであり、一対のシロッコファン1と、これらシロッコファン1を同時に回転駆動するファンモータ2と、シロッコファン1から吹き出される空気と熱交換を行う熱交換器3とを備えている。シロッコファン1は、渦巻状のスクロール6と、スクロール6内に回転自在に配置され、円筒状に配列された多数の翼を有するファン本体とを備えている。図中、4は空気の吸込み口、5は冷風または温風の吹出し口、7はファンモータ2の回転軸、8は舌部である。
1A and 1B are a schematic plan view (a) and a side view (b) showing an internal configuration of an indoor unit of an air-conditioning apparatus including a sirocco fan according to
In FIG. 1,
上記室内ユニット10は、図示しない圧縮機、凝縮器、膨張弁、蒸発器から構成される冷媒の冷凍回路を備え、室内の冷房または暖房等を行うように構成されている。また、本実施の形態1における仕様の一例を示すと、シロッコファン1は、ファン径φ160mm、幅寸法190mm、翼枚数40枚となっており、熱交換器3は、12段の伝熱管を備え、その伝熱管の列ピッチは12.7mm、段ピッチは20.4mm、伝熱管軸方向長さは700mm、通風抵抗ΔP1=23.1V1.3[Pa](V:速度[m/s])となっている。また、室内ユニット10は、奥行き680mm、高さ210mm、幅960mmとなっている。
The
室内の空気は、室内ユニット10の吸込み口4から吸い込まれ、さらにスクロール6の吸込み口から軸方向に吸い込まれる。ファンモータ2によりスクロール6内で回転する円筒状の翼列によって動圧及び静圧が付与された空気が、室内ユニット10の風路内に開口する吐出口より吹き出し、その風路内に設置された熱交換器3と熱交換され、冷風または温風となって吹出し口5から室内へ吹き出す。
The indoor air is sucked from the suction port 4 of the
図2は本発明の実施の形態1におけるモータの回転軸とベルマウスの中心の位置関係を表す図であり、点Oはベルマウス9の中心、点Pはモータ2の回転軸の中心(ファン回転中心)である。
本実施の形態のスクロール6は、渦巻状の外形上に略平行な2つの直線部12、13を有し、スクロール6の舌部8に近い方の直線部12寄りにファンモータ2の回転軸7の中心が配置されている。すなわち、ファン回転中心Pをベルマウス中心Oに対して偏心させるとともに、その偏心位置を舌部8に近い方の直線部12寄りに設置するものである。
FIG. 2 is a diagram showing the positional relationship between the rotation axis of the motor and the center of the bell mouth in
The
表1に室内ユニットの吹出し風量が16m3/minにおける、OPの長さを0mm、2mmとしたときの騒音値、回転数を示す。 Table 1 shows the noise value and the rotation speed when the length of the OP is 0 mm and 2 mm when the air flow rate of the indoor unit is 16 m 3 / min.
表1より、OPを2mmにすると騒音値、回転数を小さくすることができる。 From Table 1, when OP is set to 2 mm, the noise value and the rotational speed can be reduced.
次に、この理由を説明する。表2に、OPの長さ0mm、回転数1103rpmのときと、OPの長さ2mm、回転数1092rpmのときの、翼間最大風量を示す。風量はともに16m3/minである。 Next, the reason will be described. Table 2 shows the maximum airflow between the blades when the OP length is 0 mm and the rotation speed is 1103 rpm, and when the OP length is 2 mm and the rotation speed is 1092 rpm. Both airflows are 16 m 3 / min.
表2より、翼間最大風量はOPの長さ2mmの方が小さい。音圧エネルギは速度の6乗に比例し、騒音値は下式
SPL=10log10(p/p0)2 [dB]
p:音圧エネルギ[Pa]、p0:2×10-5[Pa]
で表されるため、騒音値を小さくする、すなわち音圧エネルギを小さくするためには、最大速度を小さくするのが効果的で、シロッコファンのように翼間風量分布が不均一な場合は、翼間風量の最大値を小さくするのがよい。
From Table 2, the maximum airflow between the blades is smaller when the OP length is 2 mm. The sound pressure energy is proportional to the sixth power of the speed, and the noise value is expressed by the following equation: SPL = 10 log 10 (p / p 0 ) 2 [dB]
p: Sound pressure energy [Pa], p 0 : 2 × 10 −5 [Pa]
Therefore, in order to reduce the noise value, that is, to reduce the sound pressure energy, it is effective to reduce the maximum speed, and when the airflow distribution between the blades is not uniform like a sirocco fan, It is recommended to reduce the maximum airflow between the blades.
実施の形態2.
図3は本発明の実施の形態2におけるスクロールの形状を表す図である。但し、本実施の形態ではベルマウス中心とファン回転中心とを一致させるものとする(偏心量ゼロの場合)。
スクロール6は、渦巻状の外形上に略平行な2つの直線部FH、EBを有し、略平行な2つの直線間の最短距離をCGとし、スクロールの直線部FH、EBと平行で、ベルマウス中心Oを通る平行線とスクロール外形との交点を点A、スクロール外形とファン回転中心Oとの距離が最大となるスクロール外形上の点を点B、ファン回転中心Oを通り、スクロールの直線部FH、EBに対する垂線と、スクロールの直線部FH、EBとの交点を点C、点Gとし、ファン半径をR、線分OAと線分OBのなす角度をθとする。
FIG. 3 is a diagram showing a scroll shape according to the second embodiment of the present invention. However, in the present embodiment, the bell mouth center and the fan rotation center are made to coincide with each other (when the eccentricity is zero).
The
従来のスクロール形状を表す曲線FGHABCEは対数螺旋であり、2R/CGは0.68程度であり、本実施の形態の0.72≦2R/CG≦0.82よりも、ファン径が小さく、所定風量を得るために必要な回転数が大きくなる。
一方、2R/CGを大きくすると、所定風量を得るために必要な回転数は小さくなるが、線分EBがファンに近づき、線分EBに近い翼間に風量が集中し、騒音値が大きくなる。
そこで、2R/CGを大きくするとともに、曲線ABを対数螺旋よりもファンから離すと、曲線AB付近の翼間風量が大きくなり、この分、線分EB付近の翼間風量が少なくなる。
The curve FGHABCE representing the conventional scroll shape is a logarithmic spiral, 2 R / CG is about 0.68, and the fan diameter is smaller than 0.72 ≦ 2 R / CG ≦ 0.82 of the present embodiment. The number of rotations required to obtain a predetermined air volume increases.
On the other hand, when 2 R / CG is increased, the number of revolutions required to obtain a predetermined air volume is reduced, but the line segment EB approaches the fan, the air volume is concentrated between the blades close to the line segment EB, and the noise level is large. Become.
Therefore, when 2 R / CG is increased and the curve AB is separated from the fan rather than the logarithmic spiral, the airflow between the blades near the curve AB increases, and the airflow between the blades near the line segment EB decreases accordingly.
表3に、従来のスクロール形状と2R/CGが0.68の場合(CASE 1)と、2R/CG=0.76、(OC−R)/R=0.375、θ=60°とした場合(CASE 2)の、室内ユニットの吹出し風量が16m3/minのときの、騒音値と回転数を示す。 Table 3 shows that the conventional scroll shape and 2 R / CG is 0.68 (CASE 1), 2 R / CG = 0.76, (OC-R) /R=0.375, θ = 60 °. (CASE 2) shows the noise value and the number of rotations when the air flow rate of the indoor unit is 16 m3 / min.
表3に示すように、2R/CG=0.76、(OC−R)/R=0.375、θ=60°としたスクロール形状を有する本実施の形態のシロッコファンの方が、従来の対数螺旋よりなるスクロール形状を有するシロッコファンよりも、2R/CGを大きくし、曲線ABをファンから離すことにより、騒音値、回転数を小さくすることができる。 As shown in Table 3, the sirocco fan of the present embodiment having a scroll shape with 2 R / CG = 0.76, (OC-R) /R=0.375, and θ = 60 ° is more conventional. By making 2 R / CG larger and separating the curve AB from the fan than the sirocco fan having a scroll shape composed of a logarithmic spiral, the noise value and the rotational speed can be reduced.
なお、(OC−R)/Rの上限値については、スクロール6の直線部EBとファン外周端との距離が0.45よりも大きくなると、送風量が低下し騒音値が大きくなるので、(OC−R)/R≦0.45とする。
As for the upper limit value of (OC-R) / R, if the distance between the linear portion EB of the
実施の形態3.
図4にファン本体11と、ファンモータ2と、モータ支持台14を組み合わせた場合の斜視図を示し、図5にモータ支持台14に通風口15がない場合の斜視図を、図6にモータ支持台14に通風口15がある場合の斜視図を示す。
また、表4に室内ユニットの吹出し風量が16m3/minにおける、モータ支持台の通風口がある場合と、ない場合の、騒音値と回転数を示す。
FIG. 4 shows a perspective view when the fan
Table 4 shows the noise value and the number of rotations with and without the air vent of the motor support base when the air flow rate of the indoor unit is 16 m 3 / min.
表4より、モータ支持台の通風口がある場合の方が、回転数はほとんど変わらないが、騒音値は小さくなる。この理由は、モータ支持台14に通風口15がない場合は、ファンから生じた静圧変動がモータ支持台14に伝播し、モータ支持台14の壁面で静圧変動が生じ、騒音となるが、モータ支持台14に通風口15がある場合は、ファンから生じた静圧変動が、互いにモータ支持台14付近における空間中で打ち消し合い、モータ支持台14の壁面の静圧変動を抑制するためである。
また、回転数がほとんど変わらないため、モータ支持台14に通風口15を設けてもシロッコファンの吸込みスペースに変化がないことがわかる。なお、上記のようにモータ支持台14に通風口15を設ける構成は、前述の実施の形態1または実施の形態2の構成と組み合わせてもよい。
According to Table 4, when the motor support base has a ventilation hole, the rotation speed is hardly changed, but the noise value is small. This is because, when the
Further, since the rotation speed hardly changes, it can be seen that even if the
実施の形態4.
図7に本実施の形態におけるスクロールの舌部8の両端にリブ16を設けた場合の模式的な斜視図を示し、図8にその模式的側面図を示す。
リブ16は略直方体形状で、リブ16のファン本体11から最も離れた点を点X、舌部8の円弧部のファン本体11から最も離れた点を点Y、リブ16のファン本体11から最も近い点を点Zとし、線分XY≦XZとする。
また、図9にリブ16がない場合の、吹出し口18に垂直な速度成分を示す。図9において、吹出し口18の点線で示す逆流領域20はファンの外部から内部へ向かう流れを表す。図10に、逆流現象を立証するために、例えば吸込み口17上の線分21から煙を入れたときの流線を示す。
Embodiment 4 FIG.
FIG. 7 shows a schematic perspective view when
The
FIG. 9 shows a velocity component perpendicular to the
表5に室内ユニットの吹出し風量が16m3/minにおける、リブがある場合と、ない場合の騒音値と回転数を示す。 Table 5 shows the noise value and the number of rotations when there is a rib and when there is no rib when the blowout air volume of the indoor unit is 16 m 3 / min.
表5に示すように、リブを設けることにより、騒音値、回転数を小さくすることができる。この理由は、リブがなく、熱交換器等の流れの抵抗体がある場合、抵抗体の通風抵抗が大きくなるほど、図9に示すようにシロッコファンの吹出し口18において、風が吹出し口18からファン内部へ向かう逆流現象が生じ、騒音値、回転数増大の原因となる。これは、図10に示すように主板側の翼間から吹出された風がスクロールに沿って、スクロールの両端へ向かい、舌部8の両端付近において、吹出し口18の方へ流れずに、舌部8とファン本体11との隙間へ流入し、さらに翼間へ流入し、主板側の翼間から吹出され、スクロールの外部へ吹き出される流れ22が生じる。このような流れが生じると、舌部の両端付近において壁面の静圧変動が大きくなり、翼間を複数回通過する流れが生じ、ファン内部で循環する風量が増えることにより、翼間風量も増加するため、翼面の静圧変動も大きくなり、騒音値が増大する。
一方、リブ16がある場合は、主板側の翼間から吹出された風がスクロールに沿って、スクロールの両端へ向かい、舌部8の両端付近において、吹出し口18の方へ流れずに、舌部8とファン本体11との隙間へ流入する流量を低減することができるため、表5に示すようにリブがない場合に比べ、騒音値、回転数を小さくすることができる。なお、リブ16の幅は5〜10mmの範囲が適している。また、本実施の形態のリブ16を設ける構成は、前述の実施の形態1〜3のいずれかの構成と組み合わせてもよい。
As shown in Table 5, the noise value and the rotational speed can be reduced by providing the rib. The reason for this is that when there is no rib and there is a flow resistor such as a heat exchanger, the greater the ventilation resistance of the resistor, the more the wind flows from the
On the other hand, when the
1 シロッコファン、2 ファンモータ、3 熱交換器、4 吸込み口、5 吹出し口、6 スクロール、7 回転軸、8 舌部、9 ベルマウス、10 室内ユニット、11 ファン本体、12 直線部、13 直線部、14 モータ支持台、15 通風口、16 リブ、17 吸込み口、18 吹出し口、20 逆流領域、22 流れ。 1 Sirocco fan, 2 fan motor, 3 heat exchanger, 4 inlet port, 5 outlet port, 6 scroll, 7 rotating shaft, 8 tongue, 9 bell mouth, 10 indoor unit, 11 fan body, 12 linear portion, 13 linear Part, 14 motor support stand, 15 ventilation port, 16 rib, 17 suction port, 18 outlet, 20 reverse flow region, 22 flow.
Claims (5)
前記スクロールは、渦巻状に形成された外形と、その外形上に略平行な2つの直線部とを有し、前記直線部のうち一方の直線部は前記スクロールの吐出口に接続され、前記モータの回転軸を前記スクロールの舌部に近い方の直線部寄りに位置させることを特徴とするシロッコファン。 In a sirocco fan that includes a scroll, a fan body that is rotatably arranged in the scroll and has a large number of blades arranged in a cylindrical shape, and a motor that rotationally drives the fan body.
The scroll has an outer shape formed in a spiral shape and two linear portions substantially parallel to the outer shape, and one of the linear portions is connected to a discharge port of the scroll, and the motor The sirocco fan is characterized in that the rotation axis of the sirocco is positioned closer to the linear portion closer to the tongue of the scroll.
前記スクロールの中心とファン回転中心とを一致させてなり、前記スクロールは、渦巻状に形成された外形と、その外形上に略平行な2つの直線部とを有し、前記直線部のうち一方の直線部は前記スクロールの吐出口に接続され、略平行な2つの直線間の最短距離をHとし、前記直線部と平行で、ベルマウス中心Oを通る平行線とスクロール外形との交点を点A、スクロール外形とファン回転中心Oとの距離が最大となるスクロール外形上の交点を点B、ファン回転中心Oを通り前記直線部とこれら直接部に対する垂線との交点をそれぞれ点C、点G、ファン半径をR、線分OAと線分OBとのなす角度をθとするとき、
0.72≦2R/H≦0.82、0.3≦(OC−R)/R≦0.45、θ≦70゜、OB≧OCとすることを特徴とするシロッコファン。 In a sirocco fan that includes a scroll, a fan body that is rotatably arranged in the scroll and has a large number of blades arranged in a cylindrical shape, and a motor that rotationally drives the fan body.
The scroll center is aligned with the fan rotation center, and the scroll has an outer shape formed in a spiral shape and two linear portions substantially parallel to the outer shape, and one of the linear portions. The straight line portion of the scroll is connected to the discharge port of the scroll, and the shortest distance between two substantially parallel straight lines is H, and the intersection of the parallel line parallel to the straight line portion and passing through the bell mouth center O and the scroll outline is marked. A, the intersection point on the scroll outer shape where the distance between the scroll outer shape and the fan rotation center O is the maximum is the point B, and the intersection points between the straight portion passing through the fan rotation center O and the perpendicular to these direct portions are the points C and G, respectively. When the fan radius is R and the angle between the line segment OA and the line segment OB is θ,
A sirocco fan characterized in that 0.72 ≦ 2R / H ≦ 0.82, 0.3 ≦ (OC−R) /R≦0.45, θ ≦ 70 °, and OB ≧ OC.
Priority Applications (13)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007081325A JP4906555B2 (en) | 2007-03-27 | 2007-03-27 | Sirocco fan and air conditioner |
EP14164771.9A EP2757268B1 (en) | 2007-03-27 | 2008-03-25 | Scirocco fan and air-conditioning apparatus |
ES14164774T ES2749113T3 (en) | 2007-03-27 | 2008-03-25 | Sirocco fan and air conditioner |
KR1020097014245A KR101179805B1 (en) | 2007-03-27 | 2008-03-25 | Sirocco fans and air conditioners |
ES08722743.5T ES2625932T3 (en) | 2007-03-27 | 2008-03-25 | Sirocco fan and air conditioning |
EP08722743.5A EP2128451B1 (en) | 2007-03-27 | 2008-03-25 | Sirocco fan and air conditioner |
PCT/JP2008/055477 WO2008123208A1 (en) | 2007-03-27 | 2008-03-25 | Sirocco fan and air conditioner |
ES14164771T ES2744990T3 (en) | 2007-03-27 | 2008-03-25 | Sirocco fan and air conditioner |
CN200880002818XA CN101595310B (en) | 2007-03-27 | 2008-03-25 | Sirocco fan and air conditioner |
EP14164774.3A EP2757269B1 (en) | 2007-03-27 | 2008-03-25 | Scirocco fan and air-conditioning apparatus |
AU2008236109A AU2008236109C1 (en) | 2007-03-27 | 2008-03-25 | Sirocco fan and air conditioner |
TW097110727A TW200916663A (en) | 2007-03-27 | 2008-03-26 | Sirocco fan and air conditioner |
HK10101626.8A HK1135160A1 (en) | 2007-03-27 | 2010-02-12 | Sirocco fan and air conditioner |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007081325A JP4906555B2 (en) | 2007-03-27 | 2007-03-27 | Sirocco fan and air conditioner |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2008240612A JP2008240612A (en) | 2008-10-09 |
JP4906555B2 true JP4906555B2 (en) | 2012-03-28 |
Family
ID=39830703
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2007081325A Active JP4906555B2 (en) | 2007-03-27 | 2007-03-27 | Sirocco fan and air conditioner |
Country Status (9)
Country | Link |
---|---|
EP (3) | EP2757269B1 (en) |
JP (1) | JP4906555B2 (en) |
KR (1) | KR101179805B1 (en) |
CN (1) | CN101595310B (en) |
AU (1) | AU2008236109C1 (en) |
ES (3) | ES2625932T3 (en) |
HK (1) | HK1135160A1 (en) |
TW (1) | TW200916663A (en) |
WO (1) | WO2008123208A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11592032B2 (en) | 2017-10-31 | 2023-02-28 | Mitsubishi Electric Corporation | Centrifugal fan, air-sending device, air-conditioning apparatus, and refrigeration cycle apparatus |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102865248B (en) * | 2011-07-06 | 2015-05-13 | 珠海格力电器股份有限公司 | Air conditioner volute and air conditioner with same |
KR101698788B1 (en) * | 2011-10-17 | 2017-01-23 | 엘지전자 주식회사 | Sirocco fan and Air condtioner having the same |
US9039363B2 (en) * | 2012-06-22 | 2015-05-26 | Trane International Inc. | Blower housing |
JP6425325B2 (en) * | 2012-12-26 | 2018-11-21 | 新晃工業株式会社 | Guide plate of plug fan in air conditioner |
JPWO2016139732A1 (en) * | 2015-03-02 | 2017-09-14 | 三菱電機株式会社 | Sirocco fan and air conditioner indoor unit using this sirocco fan |
CN107477677B (en) * | 2017-08-25 | 2023-06-06 | 重庆凌达压缩机有限公司 | Air conditioner indoor unit and air conditioner |
WO2019082392A1 (en) * | 2017-10-27 | 2019-05-02 | 三菱電機株式会社 | Centrifugal blower, air blower device, air conditioning device, and refrigeration cycle device |
CN107832261B (en) * | 2017-11-02 | 2020-09-29 | 华东交通大学 | Wavelet transform-based non-stationary exhaust noise signal order quantitative extraction method |
EP3530956B1 (en) | 2018-02-26 | 2021-09-22 | Honeywell Technologies Sarl | Impeller for a radial fan and gas burner appliance |
JP6937903B2 (en) * | 2018-05-21 | 2021-09-22 | 三菱電機株式会社 | Centrifugal blower, blower, air conditioner and refrigeration cycle device |
ES2940739T3 (en) | 2018-12-19 | 2023-05-11 | Mitsubishi Electric Corp | Centrifugal blower fan, blowing device, air conditioner and refrigeration cycle device |
KR20210011699A (en) | 2019-07-23 | 2021-02-02 | 삼성전자주식회사 | Clothes care apparatus |
US12000602B2 (en) * | 2020-11-27 | 2024-06-04 | Mitsubishi Electric Corporation | Air-conditioning apparatus |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3846040A (en) * | 1972-06-16 | 1974-11-05 | D Dennis | Blower housing |
JPS60153900A (en) * | 1984-01-21 | 1985-08-13 | 山野 陸三 | Dehydration and drying apparatus for washed article |
JPS6480698A (en) * | 1987-09-24 | 1989-03-27 | Tokyo Gas Co Ltd | Automatic supply and recovery device for pipe |
JPH0341117Y2 (en) * | 1987-11-19 | 1991-08-29 | ||
US5449271A (en) * | 1994-12-27 | 1995-09-12 | Carrier Corporation | Transverse fan with randomly varying I-shaped tongue |
JP3700217B2 (en) | 1995-10-31 | 2005-09-28 | 株式会社デンソー | Centrifugal blower |
JPH109198A (en) * | 1996-06-26 | 1998-01-13 | Matsushita Seiko Co Ltd | Installing and supporting method for fan motor |
JP3575986B2 (en) * | 1998-05-06 | 2004-10-13 | 松下エコシステムズ株式会社 | Multi-wing blower |
JP3988302B2 (en) * | 1999-02-17 | 2007-10-10 | 松下電器産業株式会社 | Multi-blade fan scroll casing |
KR100337287B1 (en) * | 1999-07-28 | 2002-05-17 | 윤종용 | centrifugal fan |
JP2005273593A (en) * | 2004-03-26 | 2005-10-06 | Nippon Densan Corp | Centrifugal fan |
KR100591335B1 (en) * | 2004-06-16 | 2006-06-19 | 엘지전자 주식회사 | Centrifugal blower |
JP2006138268A (en) | 2004-11-12 | 2006-06-01 | Fujitsu General Ltd | Centrifugal fan device |
JP2006233835A (en) | 2005-02-24 | 2006-09-07 | Matsushita Electric Ind Co Ltd | Blower |
-
2007
- 2007-03-27 JP JP2007081325A patent/JP4906555B2/en active Active
-
2008
- 2008-03-25 EP EP14164774.3A patent/EP2757269B1/en active Active
- 2008-03-25 WO PCT/JP2008/055477 patent/WO2008123208A1/en active Application Filing
- 2008-03-25 ES ES08722743.5T patent/ES2625932T3/en active Active
- 2008-03-25 CN CN200880002818XA patent/CN101595310B/en active Active
- 2008-03-25 EP EP14164771.9A patent/EP2757268B1/en active Active
- 2008-03-25 KR KR1020097014245A patent/KR101179805B1/en active IP Right Grant
- 2008-03-25 EP EP08722743.5A patent/EP2128451B1/en active Active
- 2008-03-25 AU AU2008236109A patent/AU2008236109C1/en active Active
- 2008-03-25 ES ES14164771T patent/ES2744990T3/en active Active
- 2008-03-25 ES ES14164774T patent/ES2749113T3/en active Active
- 2008-03-26 TW TW097110727A patent/TW200916663A/en unknown
-
2010
- 2010-02-12 HK HK10101626.8A patent/HK1135160A1/en unknown
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11592032B2 (en) | 2017-10-31 | 2023-02-28 | Mitsubishi Electric Corporation | Centrifugal fan, air-sending device, air-conditioning apparatus, and refrigeration cycle apparatus |
EP4299916A2 (en) | 2017-10-31 | 2024-01-03 | Mitsubishi Electric Corporation | Centrifugal blower, blowing device, air conditioner, and refrigeration cycle device |
Also Published As
Publication number | Publication date |
---|---|
KR20090088440A (en) | 2009-08-19 |
JP2008240612A (en) | 2008-10-09 |
AU2008236109B2 (en) | 2011-01-27 |
EP2128451A1 (en) | 2009-12-02 |
EP2757269A3 (en) | 2016-11-16 |
TWI352780B (en) | 2011-11-21 |
EP2757269A2 (en) | 2014-07-23 |
EP2757269B1 (en) | 2019-09-04 |
KR101179805B1 (en) | 2012-09-04 |
CN101595310A (en) | 2009-12-02 |
ES2744990T3 (en) | 2020-02-27 |
ES2625932T3 (en) | 2017-07-21 |
EP2128451A4 (en) | 2014-01-15 |
HK1135160A1 (en) | 2010-05-28 |
EP2757268A2 (en) | 2014-07-23 |
AU2008236109C1 (en) | 2011-10-13 |
WO2008123208A1 (en) | 2008-10-16 |
AU2008236109A1 (en) | 2008-10-16 |
ES2749113T3 (en) | 2020-03-19 |
EP2757268B1 (en) | 2019-08-07 |
CN101595310B (en) | 2013-09-18 |
TW200916663A (en) | 2009-04-16 |
EP2128451B1 (en) | 2017-04-19 |
EP2757268A3 (en) | 2016-11-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP4906555B2 (en) | Sirocco fan and air conditioner | |
JP6940619B2 (en) | Centrifugal blower, blower, air conditioner and refrigeration cycle device | |
JP6434152B2 (en) | Centrifugal blower, air conditioner and refrigeration cycle apparatus | |
JP6732037B2 (en) | Indoor unit and air conditioner | |
JP5806327B2 (en) | Cross flow fan | |
JP6304441B1 (en) | Cross flow type blower and indoor unit of air conditioner equipped with the blower | |
EP3315785B1 (en) | Air conditioner | |
TW200916662A (en) | Sirocco fan and air conditioner | |
JP2008050993A (en) | Double-suction type centrifugal blower | |
CN109247023B (en) | Centrifugal blower, air conditioner, and refrigeration cycle device | |
WO2010004628A1 (en) | Sirocco fan and air conditioner using the same | |
TWI623715B (en) | Air conditioner | |
JP6925571B1 (en) | Blower, indoor unit and air conditioner | |
JP6695403B2 (en) | Centrifugal blower and air conditioner | |
JP4720203B2 (en) | Centrifugal blower, air conditioner | |
JP4214994B2 (en) | Air conditioner | |
JP2008070110A (en) | Air conditioner | |
WO2023223383A1 (en) | Cross flow fan, blowing device, and refrigeration cycle device | |
CN116848323A (en) | Fan and indoor unit | |
JPWO2015063851A1 (en) | Cross-flow fan and air conditioner | |
KR20110001122A (en) | Fan assembly, ventilator and ventilation system with the same | |
JPH1183061A (en) | Blower for air conditioning |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20101026 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20101217 |
|
A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20110705 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20110926 |
|
A911 | Transfer to examiner for re-examination before appeal (zenchi) |
Free format text: JAPANESE INTERMEDIATE CODE: A911 Effective date: 20111003 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20120104 |
|
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20120110 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20150120 Year of fee payment: 3 |
|
R150 | Certificate of patent or registration of utility model |
Ref document number: 4906555 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |