JP2006233784A

JP2006233784A - Fan blade unit of centrifugal fan

Info

Publication number: JP2006233784A
Application number: JP2005046499A
Authority: JP
Inventors: Bor Haw Chang; 柏▲こう▼ 張; Junketsu Gen; 潤傑嚴
Original assignee: Kiko Kagi Kofun Yugenkoshi
Current assignee: Kiko Kagi Kofun Yugenkoshi
Priority date: 2005-02-23
Filing date: 2005-02-23
Publication date: 2006-09-07

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fan blade unit of a centrifugal fan capable of preventing backflow and overflow from an air inlet of fluid. <P>SOLUTION: A plurality of fan blades extending outward are included mainly in a wheel boss and therearound. Each of a plurality of fan blades is equipped with a first blade piece part and a second blade piece part. The first and second blade pieces are axially mounted in a connected or non-connected state. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は一種の遠心ファンのファン羽ユニットに関する。特に一種の散熱に用いる遠心ファンのファン羽構造に係る。 The present invention relates to a type of centrifugal fan fan blade unit. In particular, the present invention relates to a fan blade structure of a centrifugal fan used for a kind of heat dissipation.

台湾の半導体、IT産業は近年、急速な成長を遂げており、多数の製品が世界でリーダー的地位を占めている。科学技術の発展に伴い、それら製品は高性能、高効率、高速でありながら、かつコンパクトというトレンドに乗って発展しており、ICの小型化も進んでいる。このICの小型化は電子部品の発熱密度を高める結果につながり、高温状態での作動は電子製品を不安定にし易いため、いかにして熱を適当に排除するかは、今や製品研究開発の成否を分ける鍵となっている。
これまでは、コンピュータの発熱量はさほど大きくなかったため、散熱システムに対する要求もそれほど高くはなかった。しかし、現在のコンピュータは非常に高速で演算を行い、高い機能を具えるため、電子部品が生じる熱をケース外に排出し効果的に電子部品の冷却を行う目的で通常は内部に散熱機構を設置する。すなわち、サーモサイフォン(thermo syphon)、熱管(heat pipe)、散熱片(heat sink)などにより電子部品とシステム全体の散熱を助けているのである。
この散熱機構では、経済効率と散熱機能を同時に満たすため、ファンを散熱片に組合せ構成する散熱システムが一般ユーザーには最も広く受け入れられている。
該構造では、ファン羽ホイールが動力装置により電気エネルギーを機械エネルギーに転換し、エネルギーは羽片の伝達により気体を流動させ、これにより空間内の対流係数を増加する。この圧力の変化及び速度増加を利用し生じる流動は、熱エネルギーを直接散熱片上から持ち去り散熱の目的を達成することができる。しかし、限られた使用空間において散熱システムが散熱可能な熱エネルギー量を増大させるため、ファンの設計は非常に重要な研究課題である。
一般に最も広く散熱に使用されるファンは軸流ファンと遠心ファンの２種に分けられる。該遠心ファンはその気体の流動方向は径方向、或いは軸と垂直で、羽ホイールが回転する時、気体は羽ホイール中心から進入し、気体そのものの遠心力作用によりエネルギーを得て、気体は羽片に沿って放射状に流出するため、羽片の形状はファン全体の性能に影響を及ぼす。一般には該羽片の形状は後方湾曲型、径方向型、前湾曲型の３種に分けられる。遠心ファンの風圧は強いほうであるため、しばしば抵抗が大きいシステムに用いられるが、該遠心ファンの気流は複雑であるため、流体は羽ホイール中心に流入後、羽ホイールの回転に応じて径方向になる。このように流体は羽ホイール内において回流、逆流、流体分離現象を生じ、羽ホイール内の流道を複雑にしている。 Taiwan's semiconductor and IT industries have grown rapidly in recent years, and many products occupy a leading position in the world. Along with the development of science and technology, these products have developed along with the trend of high performance, high efficiency, high speed and compactness, and ICs are also becoming smaller. The miniaturization of this IC results in an increase in the heat generation density of electronic components, and the operation at high temperatures tends to destabilize electronic products, so how to properly remove heat is now a success or failure of product research and development. It is the key to divide
Until now, the amount of heat generated by computers has not been so large, so the demand for heat dissipation systems has not been so high. However, because current computers perform operations at very high speeds and have high functionality, a heat dissipating mechanism is usually installed inside for the purpose of effectively cooling the electronic components by discharging the heat generated by the electronic components outside the case. Install. In other words, the thermosyphon, the heat pipe, the heat sink, etc. help the heat dissipation of the electronic components and the entire system.
In this heat dissipating mechanism, a heat dissipating system in which a fan is combined with a heat dissipating piece is most widely accepted by general users in order to satisfy both economic efficiency and heat dissipating function.
In the structure, the fan blade wheel converts electrical energy into mechanical energy by the power unit, and the energy causes the gas to flow by the transmission of the blade, thereby increasing the convection coefficient in the space. The flow that takes advantage of this pressure change and speed increase can remove the heat energy directly from the heat dissipating piece and achieve the purpose of heat dissipating. However, the design of a fan is a very important research subject because it increases the amount of heat energy that can be dissipated in a limited space.
Generally, the fans that are most widely used for heat dissipation are classified into two types: axial fans and centrifugal fans. In the centrifugal fan, the flow direction of the gas is radial or perpendicular to the axis, and when the wing wheel rotates, the gas enters from the center of the wing wheel and gains energy by the centrifugal force action of the gas itself, The shape of the wings affects the overall performance of the fan as it flows radially along the piece. In general, the shape of the wing piece is divided into three types: a backward curve type, a radial direction type, and a front curve type. Since the centrifugal fan has a higher wind pressure, it is often used in systems with high resistance, but the air flow of the centrifugal fan is complex, so that after the fluid flows into the center of the wing wheel, the fluid moves in the radial direction according to the rotation of the wing wheel. become. In this way, the fluid causes circulation, reverse flow, and fluid separation in the wing wheel, complicating the flow path in the wing wheel.

図１、２に示す公知の遠心ファンの羽ホイール構造はホイールこしき１１と該ホイールこしき１１周囲に沿って外部へと延伸する複数のファン羽１２を具える。該ファン羽１２は該ホイールこしき１１周囲において放射状を呈し、該ファン羽１２の径方向に変化を加えることにより、例えば、該ファン羽１２の該ホイールこしき１１に近い片側の該ファン羽１２は平坦で真直ぐな形態を呈する(図１参照)。或いは該ファン羽１２は該ホイールこしき１１の一端から外側へと近づく一端において、完全に径方向に向かい湾曲する(図２参照)形状を呈する。
さらに図３、４、５に示すように、該ファンは上ケース体１３、下ケース体１４を含み、該上ケース体１３は表面に第一貫通孔１３１を開設し、該下ケース体１４は表面に第二貫通孔１４１を開設する。該上ケース体１３及び該下ケース体１４は一体に組み合わされ、これにより蝸型流道１５を形成し、該ホイールこしき１１、該ファン羽１２を設置する。該上ケース体１３及び該下ケース体１４の片側には出口１６を形成し、該蝸型流道１５に通じる。該ホイールこしき１１と該ファン羽１２が回転すると流体は吸入され、該流体はそれぞれ該第一貫通孔１３１と該第二貫通孔１４１より進入し、回転の動力は該流体を該ファン羽１２に沿って外部へと放射状に発散し、その後、さらに該蝸型流道１５に沿って該出口１６へと排出される。 A known centrifugal fan blade wheel structure shown in FIGS. 1 and 2 includes a wheel body 11 and a plurality of fan blades 12 extending outward along the periphery of the wheel body 11. The fan blades 12 have a radial shape around the wheel strainer 11 and change in the radial direction of the fan blades 12, for example, the fan blades 12 on one side of the fan blade 12 close to the wheel strainer 11. Is flat and straight (see FIG. 1). Alternatively, the fan blade 12 has a shape that is curved in a completely radial direction (see FIG. 2) at one end of the wheel strainer 11 that approaches the outside.
Further, as shown in FIGS. 3, 4, and 5, the fan includes an upper case body 13 and a lower case body 14, and the upper case body 13 has a first through hole 131 formed on the surface thereof, and the lower case body 14 is A second through hole 141 is opened on the surface. The upper case body 13 and the lower case body 14 are combined together to form a saddle-shaped flow path 15, and the wheel strainer 11 and the fan blade 12 are installed. An outlet 16 is formed on one side of the upper case body 13 and the lower case body 14 and communicates with the saddle type flow path 15. When the wheel strainer 11 and the fan blade 12 rotate, the fluid is sucked in. The fluid enters from the first through hole 131 and the second through hole 141, respectively, and the rotational power causes the fluid to flow into the fan blade 12. And then radiate outward along the vertical flow path 15 and then further discharged along the vertical flow path 15 to the outlet 16.

該ファン羽１２の軸方向は直線形であるため、流体を吸入する時、該第一貫通孔１３１及び該第二貫通孔１４１が生じる風圧は理論上は同一であるが、実際の応用においては問題が存在する。それは該流体が該第一貫通孔１３１と該第二貫通孔１４１より流入する時、該第一貫通孔１３１と該第二貫通孔１４１の流入条件が異なる点である。すなわち、該第二貫通孔１４１には複数のサポートバーが設置されているため、該出口１６位置の抵抗がいくらか高い時、該流体は該出口１６から完全に流出することはできない。これらの流出できなかった流体は該第一貫通孔１３１或いは該第二貫通孔１４１より逆流し、該第一貫通孔１３１或いは該第二貫通孔１４１位置の流入流体量を低下させてしまう。しかも逆流した流体もまた流入した流体と衝突し、ファンの騒音を増加させる要因となっている。 Since the axial direction of the fan blade 12 is linear, the wind pressure generated in the first through hole 131 and the second through hole 141 when the fluid is sucked is theoretically the same, but in actual application, There is a problem. That is, when the fluid flows from the first through hole 131 and the second through hole 141, the inflow conditions of the first through hole 131 and the second through hole 141 are different. That is, since a plurality of support bars are installed in the second through hole 141, the fluid cannot completely flow out from the outlet 16 when the resistance at the position of the outlet 16 is somewhat high. The fluid that could not flow out flows backward from the first through-hole 131 or the second through-hole 141, and reduces the amount of inflow fluid at the position of the first through-hole 131 or the second through-hole 141. In addition, the backflowed fluid also collides with the inflowing fluid, which increases the fan noise.

本発明は上記構造の問題点を解決した遠心ファンのファン羽ユニットを提供するものである。それはホイールこしき周囲において軸方向に複数の第一ファン羽及び第二ファンを設置し、異なる流体の流入位置の流入圧力を制御し、これにより入風量を増加し、騒音を減少させることができる。 The present invention provides a fan blade unit of a centrifugal fan that solves the problems of the above structure. It can install a plurality of first fan blades and second fans in the axial direction around the wheel squeeze to control the inflow pressure at different fluid inflow positions, thereby increasing the air intake and reducing noise .

上記課題を解決するため、本発明は下記の遠心ファンのファン羽ユニットを提供する。
それは主にホイールこしき、及び該ホイールこしき周囲に接続する複数のファン羽を含み、
該複数のファン羽は第一羽片部及び第二羽片部を具え、該第一羽片部と該第二羽片部は非接続状を呈し、かつ該第一羽片部及び該第二羽片部は軸方向に設置し、
またそれは主にホイールこしき、及び該ホイールこしき周囲に接続する複数のファン羽を含み、
該複数のファン羽は第一羽片部及び第二羽片部を具え、該第一羽片部と該第二羽片部は接続状を呈し、かつ該第一羽片部及び該第二羽片部は軸方向に設置することを特徴とする遠心ファンのファン羽ユニットである。 In order to solve the above problems, the present invention provides the following fan blade unit of a centrifugal fan.
It mainly comprises a wheel strainer and a plurality of fan blades connected around the wheel strainer,
The plurality of fan wings include a first wing piece portion and a second wing piece portion, the first wing piece portion and the second wing piece portion are unconnected, and the first wing piece portion and the second wing piece portion Two pieces are installed in the axial direction,
It also mainly includes a wheel strainer and a plurality of fan blades connected around the wheel strainer,
The plurality of fan wings include a first wing piece and a second wing piece, the first wing piece and the second wing piece are connected, and the first wing piece and the second wing piece. The wing piece is a fan wing unit of a centrifugal fan characterized by being installed in the axial direction.

上記のように、本発明はホイールこしき周囲において軸方向に複数の第一ファン羽及び第二ファンを設置し、異なる流体の流入位置の流入圧力を制御することにより入風量を増加させ、騒音を減少させることができる。 As described above, the present invention installs a plurality of first fan blades and second fans in the axial direction around the wheel squeeze, and controls the inflow pressures at the inflow positions of different fluids to increase the amount of incoming air and reduce noise. Can be reduced.

図６、７に示すように、本発明の第一最適実施例はホイールこしき２１、複数のファン羽２２を含む。
該ファン羽２２は該ホイールこしき２１周囲に接続し、該ファン羽２２は根部２２１、第一羽片部２２２、第二羽片部２２３を具える。該根部２２１の一端は該ホイールこしき２１周囲に接続し、反対端はそれぞれ延伸し該第一羽片部２２２と該第二羽片部２２３を形成する。本実施例における該第一羽片部２２２と該第二羽片部２２３の数は同一で、かつ不接続状態で軸方向に設置する。すなわち、該第一羽片部２２２と該第二羽片部２２３は上下の位置関係を呈し排列され、該第一羽片部２２２の径方向の湾曲方向と湾曲角度は該第二羽片部２２３とは異なる。つまり図７に示す該第一羽片部２２２は該第二羽片部２２３と隣り合った該第二羽片部２２３間に形成され、分岐状を呈する。 As shown in FIGS. 6 and 7, the first optimum embodiment of the present invention includes a wheel strainer 21 and a plurality of fan blades 22.
The fan wing 22 is connected to the periphery of the wheel strainer 21, and the fan wing 22 includes a root 221, a first wing piece 222, and a second wing piece 223. One end of the root portion 221 is connected to the periphery of the wheel strainer 21, and the opposite ends are extended to form the first wing piece portion 222 and the second wing piece portion 223. In this embodiment, the number of the first wing pieces 222 and the number of the second wing pieces 223 are the same, and they are installed in the axial direction in a disconnected state. That is, the first wing piece portion 222 and the second wing piece portion 223 exhibit an upper and lower positional relationship and are arranged, and the bending direction and the bending angle in the radial direction of the first wing piece portion 222 are determined by the second wing piece portion. Different from 223. That is, the first wing piece portion 222 shown in FIG. 7 is formed between the second wing piece portions 223 adjacent to the second wing piece portion 223 and has a branched shape.

次に図８、９、１０に示すように、本発明の第一最適実施例はさらに上ケース体２３、下ケース体２４を含む。該上ケース体２３は表面に第一貫通孔２３１を開設し、該下ケース体２４は表面に第二貫通孔２４１を開設する。該上ケース体２３と該下ケース体２４は一体に組み合わされ蝸型流道２５を形成し、該ホイールこしき２１と該ファン羽２２を設置する。該上ケース体２３と該下ケース体２４の片側には出口２６を形成し、該蝸型流道２５に通じる。
該ホイールこしき２１と該ファン羽２２が回転すると流体を吸入し、該流体はそれぞれ該第一貫通孔２３１と該第二貫通孔２４１より進入し、該複数のファン羽２２の各ファン羽２２と隣り合った該ファン羽２２間の流道を通過する。さらに、回転の動力を利用し、該流体は該各ファン羽２２に沿って外部へと放射され、該蝸型流道２５に沿って出口２６へと排出される。該流体がそれぞれ該第一貫通孔２３１と該第二貫通孔２４１より該ファン羽２２と該ファン羽２２間に流入する時、該ファン羽２２の該第一羽片部２２２と該第二羽片部２２３は軸方向に上下に設置されているため、該第一羽片部２２２は該第二羽片部２２３と隣り合った該第二羽片部２２３間に位置する。こうして、該出口２６の抵抗力が増大することにより、各流道間の流体の一部が逆流を生じ該第一貫通孔２３１或いは該第二貫通孔２４１に向かって流出することを防止可能である。すなわち、公知構造の欠点である流体の逆流、溢出が流体の流量を減少させる点を改善することができ、また逆流した流体と流入した流体が衝突することによる騒音発生を減少させることができる。
該第一羽片部２２２と該第二羽片部２２３は異なる数とすることができ(図１１参照)、その厚さも同一或いは不同一とすることができる(図示なし)。しかもその径方向の湾曲の方向(図１２参照)、及び角度(図示なし)は同一とすることができ、上記と同様の作用と効果を達成可能である。 Next, as shown in FIGS. 8, 9, and 10, the first optimum embodiment of the present invention further includes an upper case body 23 and a lower case body 24. The upper case body 23 has a first through hole 231 on the surface, and the lower case body 24 has a second through hole 241 on the surface. The upper case body 23 and the lower case body 24 are combined together to form a saddle-shaped flow path 25, and the wheel strainer 21 and the fan blade 22 are installed. An outlet 26 is formed on one side of the upper case body 23 and the lower case body 24 and communicates with the saddle type flow path 25.
When the wheel strainer 21 and the fan blade 22 rotate, the fluid is sucked, and the fluid enters from the first through hole 231 and the second through hole 241, respectively. And the flow path between the fan wings 22 adjacent to each other. Further, by utilizing the rotational power, the fluid is radiated to the outside along the fan blades 22 and discharged to the outlet 26 along the saddle type flow path 25. When the fluid flows between the fan blade 22 and the fan blade 22 through the first through hole 231 and the second through hole 241, respectively, the first blade portion 222 of the fan blade 22 and the second blade Since the piece 223 is installed vertically in the axial direction, the first wing piece 222 is located between the second wing piece 223 adjacent to the second wing piece 223. Thus, by increasing the resistance force of the outlet 26, it is possible to prevent a part of the fluid between the flow paths from flowing back toward the first through-hole 231 or the second through-hole 241. is there. In other words, the backflow and overflow of the fluid, which are disadvantages of the known structure, can be improved in that the flow rate of the fluid is reduced, and the generation of noise caused by the collision between the backflowed fluid and the inflowing fluid can be reduced.
The first wing piece portion 222 and the second wing piece portion 223 may have different numbers (see FIG. 11), and the thicknesses thereof may be the same or not (not shown). Moreover, the direction of the radial curvature (see FIG. 12) and the angle (not shown) can be the same, and the same operation and effect as described above can be achieved.

続いて図１３、１４、１５、１６に示すように、本発明の第二最適実施例の全体的な構造と機能、及び実施形態は概ね第一最適実施例のそれと同様である。その相違点は、複数のファン羽３２の根部３２１の外へと向かい延伸する各第一羽片部３２２と第二羽片部３２３が接続状を呈する点である。
該第一羽片部３２２と該第二羽片部３２３の断面図である図１５、１６に示すように、該第一羽片部３２２と該第二羽片部３２３は２個の反対方向を向く三角形が軸方向に接続し設置され(図１５参照)、或いは２個の反対方向を向く円弧が軸方向に接続し設置され(図１６参照)、上記と同様の作用と効果を達成可能である。 Subsequently, as shown in FIGS. 13, 14, 15, and 16, the overall structure and function of the second optimum example of the present invention, and the embodiment are substantially the same as those of the first optimum example. The difference is that the first wing piece portions 322 and the second wing piece portions 323 extending toward the outside of the root portions 321 of the plurality of fan wings 32 are connected.
As shown in FIGS. 15 and 16, which are sectional views of the first wing portion 322 and the second wing piece portion 323, the first wing piece portion 322 and the second wing piece portion 323 have two opposite directions. A triangle pointing in the axial direction is connected and installed in the axial direction (see FIG. 15), or two arcs facing in the opposite direction are connected in the axial direction and installed (see FIG. 16), and the same operation and effect as above can be achieved. It is.

さらに図１７、１８に示すように、本発明の第三最適実施例の全体的な構造と機能、及び実施形態は概ね第一最適実施例のそれと同様である。その相違点は、ファン羽４２の根部４２１の外へと向かい延伸する各第一羽片部４２２と第二羽片部４２３が一部が接続状を呈し、一部は不接続状及び分岐状を呈する点である。これによっても上記と同様の作用と効果を達成可能である。 Further, as shown in FIGS. 17 and 18, the overall structure and function of the third optimum embodiment of the present invention, and the embodiment are substantially the same as those of the first optimum embodiment. The difference is that each of the first wing piece portions 422 and the second wing piece portions 423 extending toward the outside of the root portion 421 of the fan wing 42 has a connection state, and a part thereof has a connection state and a branch shape. It is a point that exhibits. This also makes it possible to achieve the same operations and effects as described above.

公知の遠心ファンの第一種ファン羽構造の指示図である。It is an instruction diagram of a first type fan blade structure of a known centrifugal fan. 公知の遠心ファンの第二種ファン羽構造の指示図である。It is an instruction diagram of a second type fan blade structure of a known centrifugal fan. 公知の遠心ファンを上下ケース体内に応用する様子を示す分解指示図である。It is a decomposition | disassembly instruction | indication figure which shows a mode that a well-known centrifugal fan is applied in an upper and lower case body. 公知の遠心ファンを上下ケース体内に応用する様子を示す立体組合せ指示図である。It is a three-dimensional combination instruction | indication figure which shows a mode that a well-known centrifugal fan is applied in an upper and lower case body. 図４の断面指示図である。FIG. 5 is a sectional view of FIG. 4. 本発明第一最適実施例の立体指示図である。FIG. 3 is a three-dimensional instruction diagram of the first optimum embodiment of the present invention. 本発明第一最適実施例の俯瞰指示図である。It is a bird's-eye view instruction diagram of the first optimal embodiment of the present invention. 本発明第一最適実施例を上下ケース体内に応用する様子を示す分解指示図である。It is a decomposition | disassembly instruction | indication figure which shows a mode that the 1st optimal embodiment of this invention is applied in the upper and lower case bodies. 本発明第一最適実施例を上下ケース体内に応用する様子を示す組合せ指示図である。It is a combination instruction | indication figure which shows a mode that the 1st optimal embodiment of this invention is applied in the upper and lower case bodies. 本発明第一最適実施例を上下ケース体内に応用する様子を示す断面指示図である。It is a section indication figure showing signs that the first optimum embodiment of the present invention is applied in the upper and lower case bodies. 本発明第一最適実施例の第一羽片部及び第二羽片部の別種の形態の俯瞰指示図である。It is a bird's-eye view instruction view of another form of the first wing piece part and the second wing piece part of the first optimum embodiment of the present invention. 本発明第一最適実施例の第一羽片部及び第二羽片部のさらに別種の形態の俯瞰指示図である。It is a bird's-eye view instruction view of still another form of the first wing piece part and the second wing piece part of the first optimum embodiment of the present invention. 本発明第二最適実施例の立体指示図である。It is a three-dimensional instruction diagram of the second optimal embodiment of the present invention. 本発明第二最適実施例の第一羽片部及び第二羽片部の断面指示図である。It is a cross-sectional direction view of the first wing piece part and the second wing piece part of the second optimum embodiment of the present invention. 本発明第二最適実施例の第一羽片部及び第二羽片部の別種の形態の断面指示図である。It is a cross-sectional indication figure of the form of another kind of the 1st wing piece part of the 2nd optimal example of this invention, and a 2nd wing piece part. 本発明第二最適実施例の第一羽片部及び第二羽片部のさらに別種の形態の断面指示図である。It is a cross-sectional indication figure of the further another form of the 1st wing piece part of the 2nd optimal embodiment of this invention, and a 2nd wing piece part. 本発明第三最適実施例の立体指示図である。It is a three-dimensional instruction diagram of the third optimum embodiment of the present invention. 本発明第三最適実施例の俯瞰指示図である。It is a bird's-eye view instruction diagram of the third optimum embodiment of the present invention.

Explanation of symbols

１１ホイールこしき
１２ファン羽
１３上ケース体
１３１第一貫通孔
１４下ケース体
１４１第二貫通孔
１５蝸型流道
１６出口
２１ホイールこしき
２２ファン羽
２２１根部
２２２第一羽片部
２２３第二羽片部
２３上ケース体
２３１第一貫通孔
２４下ケース体
２４１第二貫通孔
２５蝸型流道
２６出口
３２ファン羽
３２１根部
３２２第一羽片部
３２３第二羽片部
４２ファン羽
４２１根部
４２２第一羽片部
４２３第二羽片部 11 Wheel strainer 12 Fan blade 13 Upper case body 131 First through hole 14 Lower case body 141 Second through hole 15 Vertical flow path 16 Exit 21 Wheel strainer 22 Fan blade 221 Root 222 First blade piece 223 Second Feather part 23 Upper case body 231 First through hole 24 Lower case body 241 Second through hole 25 Vertical flow path 26 Outlet 32 Fan feather 321 Root part 322 First feather part 323 Second feather part 42 Fan feather 421 Root part 422 First wing part 423 Second wing part

Claims

Mainly wheel strainer, including multiple fan feathers,
The plurality of fan wings are connected around the wheel squeeze, and include a first wing piece portion and a second wing piece portion, and the first wing piece portion and the second wing piece portion are disconnected. Features a fan blade unit for centrifugal fans.

The fan blade unit of the centrifugal fan according to claim 1, wherein the first blade portion and the second blade portion are installed in an axial direction.

The fan blade unit of the centrifugal fan according to claim 1 or 2, wherein the number of the first blade piece portion and the number of the second blade piece portion are the same.

3. The fan blade unit of the centrifugal fan according to claim 1, wherein the number of the first blade piece portion and the number of the second blade piece portion are different.

The fan blade unit of the centrifugal fan according to claim 1 or 2, wherein the first blade portion and the second blade portion have the same thickness.

The fan blade unit of the centrifugal fan according to claim 1 or 2, wherein the first blade portion and the second blade portion have different thicknesses.

The fan blade unit of the centrifugal fan according to claim 1 or 2, wherein the first blade piece portion and the second blade piece portion have the same bending angle in the radial direction.

The fan blade unit of the centrifugal fan according to claim 1 or 2, wherein the first blade piece and the second blade piece have different radial bending angles.

The fan blade unit of the centrifugal fan according to claim 1 or 2, wherein the radial direction of bending of the first blade portion and the second blade portion is different.

The fan blade unit of the centrifugal fan according to claim 1 or 2, wherein the radial direction of bending of the first blade portion and the second blade portion is the same.

Mainly wheel strainer, including multiple fan feathers,
The plurality of fan wings are connected around the wheel squeeze, and include a first wing piece portion and a second wing piece portion, and the first wing piece portion and the second wing piece portion are connected. The fan blade unit of a centrifugal fan.

The fan blade unit of the centrifugal fan according to claim 11, wherein the first blade portion and the second blade portion are installed in an axial direction.

The fan blade unit of the centrifugal fan according to claim 11 or 12, wherein the number of the first blade portion and the number of the second blade portion are the same.

The fan blade unit of the centrifugal fan according to claim 11 or 12, wherein the number of the first blade portion and the number of the second blade portion are different.

The fan blade unit of the centrifugal fan according to claim 11 or 12, wherein the first blade portion and the second blade portion have the same thickness.

The fan blade unit of the centrifugal fan according to claim 11 or 12, wherein the first blade portion and the second blade portion have different thicknesses.

The fan blade unit of the centrifugal fan according to claim 11 or 12, wherein the first blade piece portion and the second blade piece portion have the same radial bending angle.

The fan blade unit of the centrifugal fan according to claim 11 or 12, wherein the first and second blade portions have different radial bending angles.

The fan blade unit of the centrifugal fan according to claim 11 or 12, wherein the first and second blade portions are different in the radial direction of bending.

The fan blade unit of the centrifugal fan according to claim 11 or 12, wherein the first wing piece portion and the second wing piece portion have the same radial bending direction.

Mainly wheel strainer, including multiple fan feathers,
The plurality of fan wings are connected around the wheel squeeze and include a first wing piece portion and a second wing piece portion, and the first wing piece portion and the second wing piece portion are connected and partially unconnected. A fan blade unit of a centrifugal fan characterized by a connected state.