WO2014153748A1 - 离心风扇和具有其的干衣机 - Google Patents

离心风扇和具有其的干衣机 Download PDF

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Publication number
WO2014153748A1
WO2014153748A1 PCT/CN2013/073321 CN2013073321W WO2014153748A1 WO 2014153748 A1 WO2014153748 A1 WO 2014153748A1 CN 2013073321 W CN2013073321 W CN 2013073321W WO 2014153748 A1 WO2014153748 A1 WO 2014153748A1
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WO
WIPO (PCT)
Prior art keywords
centrifugal fan
blades
airflow
motor cover
main
Prior art date
Application number
PCT/CN2013/073321
Other languages
English (en)
French (fr)
Inventor
陆彭飞
黄华
周福昌
Original Assignee
无锡小天鹅股份有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 无锡小天鹅股份有限公司 filed Critical 无锡小天鹅股份有限公司
Priority to PCT/CN2013/073321 priority Critical patent/WO2014153748A1/zh
Priority to EP13880416.6A priority patent/EP2980304B1/en
Publication of WO2014153748A1 publication Critical patent/WO2014153748A1/zh

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers

Definitions

  • the present invention relates to the field of household appliance equipment, and more particularly to a centrifugal fan and a dryer having the same. Background technique
  • centrifugal fan uses a centrifugal fan that rotates at a high speed to allow gas to enter the centrifugal fan from the axial direction, and is discharged from the blades of the centrifugal fan in the radial direction by the centrifugal force.
  • Centrifugal fans of centrifugal fans are usually powered by a motor that rotates at high speeds by the rotation of the motor's output shaft.
  • a motor cover is usually arranged in a central area thereof, and the motor cover has a large volume, which becomes a main obstacle for the airflow to flow into the central negative pressure region of the centrifugal fan, and the flow impinges on the surface of the motor cover to form a reflow.
  • the airflow at the air inlet of the centrifugal fan is not good, and the performance of the fan is degraded.
  • the present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention needs to provide a centrifugal fan which can better flow the airflow at the air inlet, increase the fan outlet pressure, and improve the efficiency of the fan.
  • the present invention also needs to provide a clothes dryer having the centrifugal fan.
  • a centrifugal fan includes a plurality of main blades provided at a periphery thereof, and is characterized in that a plurality of sub-blades distributed in the radial direction are provided on a face mask in which the centrifugal fan faces the air intake direction.
  • the centrifugal fan according to the present invention can effectively reduce the obstruction effect of the mask or the motor cover, so that the airflow state at the air inlet of the centrifugal fan is better, and the two-stage supercharging speed increase of the sub-blade and the main blade is realized, and the centrifugal fan is significantly enlarged.
  • the outlet air pressure increases the efficiency of the fan.
  • the mask of the centrifugal fan is a motor cover.
  • the centrifugal fan further includes: a rim having an air inlet for air inflow; and a wheel, the wheel being disposed under the rim and a central area of the wheel is configured as the motor cover, the motor cover is upwardly convex and a connecting sleeve is disposed on a top thereof; the plurality of main blades are circumferentially spaced apart from the wheel and the wheel Between the two adjacent main blades, a first air flow passage is defined; the plurality of sub-blades are sleeved around the connecting shaft on the motor cover, and between the two adjacent sub-blades A second air flow passage is defined, and the first air flow passage, the second air flow passage, and the air inlet are connected to each other.
  • the airflow from the air inlet into the centrifugal fan flows to the motor cover and the main blade.
  • the main blade In the gap between the two, in the high-speed rotation of the centrifugal fan, the main blade is boosted and accelerated, and is discharged from the first air flow passage; wherein another part of the air flow in the axial flow process can be guided by the auxiliary vane.
  • the airflow impinges on the top surface of the motor cover to rebound and return to form a turbulent flow, and the state of the inlet airflow is well adjusted, and the air guiding efficiency is greatly improved.
  • the airflow flowing into the centrifugal fan can be first speeded up by the superheating of the sub-blades, and then accelerated by the supercharging of the main blades, and the fan outlet pressure and flow rate are further improved.
  • the centrifugal fan according to the present invention can make the airflow state at the air inlet port better, avoid turbulent flow, increase the airflow pressure, increase the flow rate, and improve the fan efficiency.
  • centrifugal fan according to the present invention may have the following additional technical features:
  • the plurality of sub-blades are divided into a plurality of groups, and the plurality of sub-blades are evenly arranged around the connecting sleeve. This ensures the uniformity of the mass of the entire centrifugal fan and prevents the centrifugal fan from shaking during the rotation.
  • the plurality of sub-blades are evenly arranged around the connecting sleeve. This ensures the uniformity of the mass of the entire centrifugal fan and avoids the jitter of the centrifugal fan during the rotation.
  • the upper surface of the secondary blade is flush with the upper surface of the rim. This further enhances the stability of the flow regime and further reduces turbulence.
  • the sub-blades are the same thickness as the main blades. Thereby the flow of the gas stream is more reasonable.
  • the sub-blades are in the same direction as the leaf shape of the main blades. In this way, the flow direction of the airflow tends to be uniform, the flow is smoother, and the stability of the airflow is ensured.
  • the inflow angle of the sub-blades is the same as the inflow angle of the main blades.
  • the outflow angle of the sub-blades is slightly smaller than the outflow angle of the main blades.
  • the rim, the wheel, the plurality of main blades, and the plurality of sub blades are integrally formed. This ensures the stability of the connection between the rim, the wheel, the plurality of main blades and the plurality of sub-blades.
  • the top surface of the motor cover is formed as an arcuate surface or plane.
  • the connecting sleeve is disposed coaxially with the motor cover.
  • a clothes dryer according to a second aspect of the present invention comprising a duct, and the centrifugal fan according to the first aspect of the invention, wherein the centrifugal fan is disposed in the duct.
  • the dryer is equipped with a centrifugal fan and has high working efficiency. , good performance and other advantages.
  • FIG. 1 is a plan view of a centrifugal fan in accordance with an embodiment of the present invention
  • FIG. 2 is a side view of a centrifugal fan in accordance with an embodiment of the present invention.
  • FIG. 3 is a perspective view of a centrifugal fan in accordance with an embodiment of the present invention.
  • FIG. 4 is a schematic view of a clothes dryer having a centrifugal fan in accordance with an embodiment of the present invention. detailed description
  • connection should be understood broadly, and may be either fixed or detachable, unless explicitly stated or defined otherwise.
  • Connected, or connected integrally can be mechanical or electrical; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of the two components.
  • the specific meaning of the above terms in the present invention can be understood in a specific case by those skilled in the art.
  • centrifugal fan 100 is an important component of the dryer 200 or the washing and drying machine, and the centrifugal fan 100 is rotated by the driving of the motor.
  • the clothes dryer 200 includes a duct 10 and a centrifugal fan 100 disposed in the duct 10.
  • the dryer 200 also includes a housing for holding the laundry, an electrical system, a housing, and the like, as this portion is known and common in the art. The skilled person is well known and will not be described again.
  • the centrifugal fan 100 includes a plurality of main blades 3 provided at the periphery thereof, and a plurality of sub-blades 4 distributed in the radial direction are provided on the face shield of the centrifugal fan 100 facing the air inlet direction.
  • the mask of the centrifugal fan is a motor cover 21, and a motor for driving the centrifugal fan 100 may be disposed behind the motor cover 21.
  • the centrifugal fan 100 of one embodiment of the present invention further includes a rim 1 and a wheel 2.
  • a rim 1 and a wheel 2 For convenience of description, in the following embodiments of the present invention, the structure of the centrifugal fan 100 will be described by taking the rim 1 and the wheel 2 in the up and down direction as an example. In the description of the embodiment of the present invention: "up and down direction" is shown by arrows in Figs. 2 and 3, for example. However, it should be noted that the indication of the direction is for illustrative purposes only and is not intended to limit the scope of the invention.
  • the rim 1 has an air inlet for air inflow.
  • the rim 1 is annular, and the inner ring of the ring defines the air inlet.
  • air can enter the centrifugal fan 100 through the air inlet to form an inlet airflow.
  • the wheel 2 can be disposed under the rim 1.
  • the central area of the wheel 2 is configured as an upwardly protruding motor cover 21, and the top of the motor cover 21 is provided with a connecting sleeve 22, and the output shaft of the motor can be sleeved thereon.
  • the sleeve 22 is coupled to rotate the centrifugal fan 100 under the driving of the motor.
  • a plurality of main blades 3 are circumferentially spaced between the rim 1 and the wheel 2, and a first air flow passage 31 is defined between the adjacent two main blades 3.
  • the airflow entering the centrifugal fan 100 from the air inlet is discharged from the first air flow passage 31 in the radial direction of the centrifugal fan 100 by the centrifugal force generated by the high-speed rotation of the centrifugal fan 100.
  • a plurality of sub-blades 4 are provided on the wheel 2, specifically, a plurality of sub-blades 4 are provided on the motor cover 21 located in the central region of the wheel 2, and a plurality of sub-blades 4 are circumferentially arranged around the connecting bushing 22,
  • a second air flow passage 41 is defined between the adjacent two sub-blades 4.
  • the first air flow path 31, the second air flow path 41, and the air inlet are in communication with each other. After entering the centrifugal fan 100 from the air inlet, the gas can be directly discharged not only from the first air flow path 31 but also from the first air flow path 31 through the second air flow path 41.
  • the airflow entering the centrifugal fan 100 from the air inlet port flows to a gap between the motor cover 21 and the main blade 3, and is driven by the main blade during the high-speed rotation of the centrifugal fan 100.
  • the supercharging speed is increased from the first air flow passage 31.
  • another part of the airflow may first flow along the second air flow passage 41 under the guidance of the auxiliary vane 4, and then flow into the first air flow passage 31 and be discharged.
  • the airflow impinges on the top surface of the motor cover 21 to rebound and return to form a turbulent flow, and the state of the inlet airflow is better improved, and the air guiding efficiency is significantly improved.
  • the airflow flowing into the centrifugal fan 100 can be first speed-up by the supercharging of the sub-blades 4, and then accelerated by the supercharging of the main blades 3, and the pressure of the airflow is further increased, thereby improving to some extent. Air flow rate.
  • the centrifugal fan 100 according to the embodiment of the present invention can better make the airflow state at the air inlet, reduce the inlet turbulence, increase the airflow pressure, increase the flow rate, and improve the air guiding efficiency.
  • the top surface of the motor cover 21 may be formed as an arc surface, and the connecting sleeve 22 is coaxially disposed with the motor cover 21, that is, The connecting sleeve 22 coincides with the axis of the motor cover 21.
  • the top surface of the motor cover 21 may be formed as a plane, and the connecting sleeve 22 is disposed coaxially with the motor cover 21, that is, the connecting sleeve 22 is disposed in the motor cover. At the center of 21.
  • the motor cover 21 can be more adapted to the shape of the motor, and the motor is more stable when the centrifugal fan 100 is driven to rotate.
  • the invention is not limited thereto, and the shape of the motor cover 21 may have different shapes depending on the different configurations of the motor, and is for illustrative purposes only, and is not intended to limit the scope of the invention.
  • the plurality of sub-blades 4 may be divided into a plurality of groups, and the plurality of sub-blades 4 may be evenly arranged around the connecting sleeve 22. This ensures the uniformity of the mass of the entire centrifugal fan 100, avoids the jitter of the centrifugal fan 100 during the rotation, and thereby avoids the confusion of the airflow entering the centrifugal fan 100.
  • the sub-blades 4 comprise a total of twenty-four, which are divided into six groups, each group comprising four sub-blades 4, wherein six sets of blades can be evenly arranged around the connecting sleeve 22, it is understood that The spacing between the six sets of blades is uniform, and the structure, shape, size, and the like of each of the six sets of blades are the same, thereby making the structural and mass distribution of the centrifugal fan 100 more uniform.
  • the four sub-blades 4 in each group of blades can be correspondingly designed according to the actual wind guiding needs.
  • a plurality of sub-blades 4 are evenly arranged around the connecting sleeve 22. That is to say, the above-mentioned twenty-four sub-blades 4 are evenly arranged around the connecting bushing 22, thereby further improving the uniformity of the mass of the centrifugal fan 100, further avoiding the jitter of the centrifugal fan 100 during the turning process, thereby The airflow entering the centrifugal fan 100 is more orderly.
  • the main blade 3 and the secondary blade 4 are both forward blades or both.
  • the outflow angles of the sub-blades 4 and the main blades 3 are similar, that is, the blade shape is basically determined. If the angle of the outflow angle is greater than 90°, it can be regarded as a forward blade shape; if the angle of the outflow angle is Less than 90°, it can be considered as a backward leaf shape.
  • the bending direction of the sub-blades 4 is the same as the bending direction of the main blades 3. For example, if the main blade 3 is bent clockwise inwardly around the connecting bushing 22, the sub-blade 4 may also be bent clockwise inwardly about the connecting bushing 22. Therefore, the airflow flowing into the second airflow passage 41 can enter the first airflow passage 31 according to the original flow direction, so that the flow direction of the airflow tends to be uniform, the flow is smoother, and the stability of the airflow is ensured. .
  • the inflow angle of the sub-blades 4 may be the same as the inflow angle of the main blades 3. This can In order to further ensure the uniformity of the flow direction of the airflow, and the airflow flows from the second airflow passage 41 to the first airflow passage 31, it is smoother and smoother, and the entrance impact loss of the airflow is reduced.
  • the outflow angle of the sub-blades 4 may be slightly smaller than the outflow angle of the main blades 3.
  • the secondary vanes 4 are the same thickness as the primary vanes 3. Thus, when the airflow flows from the second airflow passage 41 to the first airflow passage 31, the distribution of the airflow is more uniform, and the flow of the airflow in the centrifugal fan 100 can be ensured to be more stable.
  • the upper surface of the secondary vane 4 does not exceed the upper surface of the rim 1, thereby making the flow regime more stable and reducing turbulence.
  • the upper surface of the sub-blade 4 is flush with the upper surface of the rim 1, whereby the stability of the airflow state can be further improved, and turbulence can be further reduced.
  • the rim 1, the wheel 2, the plurality of main blades 3 and the plurality of sub-blades 4 are integrally formed.
  • each of the sub-blades 4 is integrally formed on the motor cover 21 of the wheel 2, and the upper and lower ends of each of the main blades 3 are integrally connected to the rim 1 and the wheel 2, respectively.
  • the rim 1, the wheel 2, the main blade 3 and the sub-blade 4 may all be plastic parts and integrally formed by injection molding. Thereby, not only the degree of stability of the connection between the rim 1, the wheel 2, the plurality of main blades 3, and the plurality of sub-blades 4 can be ensured, but also the cost of manufacturing materials can be reduced by manufacturing the centrifugal fan 100 using plastic parts. The weight of the centrifugal fan 100 is reduced.
  • the present invention also proposes a centrifugal fan comprising a centrifugal fan 100 according to the above embodiment of the present invention. Since the centrifugal fan 100 can make the airflow state at the air inlet thereof better, reduce the inlet turbulence, increase the airflow pressure, increase the flow velocity, and improve the air guiding efficiency, therefore, the centrifugal fan provided with the centrifugal fan 100 has High air conduction efficiency and good performance.
  • the centrifugal fan according to an embodiment of the present invention further includes a motor and a volute, wherein the motor and the centrifugal fan 100 may both be disposed in the volute.
  • the volute may have an upper end plate, a lower end plate, and a side wall plate disposed circumferentially.
  • the side wall plate, the upper end plate and the lower end plate of the volute jointly define an accommodation space in which the motor and the centrifugal fan 100 are disposed.
  • the upper end plate may have a second air inlet for air entering, and when the centrifugal fan 100 is disposed in the volute, the first air inlet and the second air inlet are concentric.
  • the lower end plate may be provided with a receiving groove for accommodating the motor.
  • the motor is disposed in the receiving groove.
  • the motor cover 21 can block the motor, that is, the motor cover 21 and the receiving groove can be defined. Out of the installation space, the motor is housed in the installation space, and the output shaft of the motor is connected to the connection sleeve 22.
  • the side wall panel has an air outlet for airflow, so that the airflow entering through the second air inlet and the first air inlet can finally discharge the centrifugal fan from the air outlet. Since this section is known and known to those of ordinary skill in the art, it will not be described in detail. The following briefly describes the working process of the centrifugal fan.
  • the motor is started, and the output shaft of the motor can drive the centrifugal fan 100 to rotate.
  • the air around the centrifugal fan sequentially enters the centrifugal fan through the second air inlet and the first air inlet to form an inlet air flow.
  • a part of the inlet air flow can flow directly from the gap between the motor cover 21 and the main blade 3 to the first air flow path 31 and be discharged to the outside of the centrifugal fan 100.
  • the other portion may first flow into the second air flow passage 41, and after the second air flow passage 41 is boosted and accelerated, flows into the first air flow passage 31 and is discharged to the outside of the centrifugal fan 100.
  • the high-speed airflow discharged from the centrifugal fan 100 enters the volute and is concentrated, and is discharged from the air outlet, thereby completing the discharge of the airflow by the centrifugal fan.
  • the clothes dryer 200 is provided with a centrifugal fan 100 to drive the airflow in the air duct 10 to promote air circulation to make the laundry drying faster and more uniform. Since the centrifugal fan 100 can make the airflow state at the air inlet thereof better, reduce the inlet turbulence, increase the airflow pressure, increase the flow velocity, and improve the fan efficiency, the dryer 200 is provided with the centrifugal fan 100. High efficiency and good performance.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

公开了一种离心风扇和具有其的干衣机。离心风扇（100）包括：在其周边设有多个主叶片（3），在离心风扇面向进风方向的面罩上设有多个沿径向分布的多个副叶片（4）。离心风扇进一步包括轮圈（1）、轮盘（2）。轮盘的中心区域被构造成电机罩（21），多个主叶片周向间隔设在轮圈和轮盘之间，相邻两个主叶片之间限定出第一气流通道（31），多个副叶片围绕连接轴套设在电机罩上，相邻两个副叶片之间限定出第二气流通道（41），第一气流通道、第二气流通道和进风口相互连通。该离心风扇能够有效降低电机罩的阻碍作用，使离心风扇进风口处的气流流态更好，并实现了副叶片、主叶片的两级增压提速，显著增大离心风扇出口气流压力，提高风机效率。

Description

离心风扇和具有其的干衣机
技术领域
本发明涉及家用电器设备领域， 尤其是涉及一种离心风扇和具有其的干衣机。 背景技术
风机， 以气体流动方向的不同被大致分为轴流风机和离心风机。 离心风机通过利用 高速旋转的离心风扇， 使气体从轴向进入离心风扇， 并在其离心力的作用下， 从离心风 扇的叶片之间， 沿径向的方向排出。 离心风机的离心风扇通常是由电机提供动力， 通过 电机输出轴的旋转带动其高速旋转。
现有技术中的离心风扇， 通常会在其中心区域设置电机罩， 电机罩体积较大， 成为 气流流入离心风扇中心负压区的主要障碍， 且气流流动过程中撞击在电机罩表面形成回 流， 导致离心风机进风口处气流状态不佳， 风机性能下降。 发明内容
本发明旨在至少解决现有技术中存在的技术问题之一。 为此， 本发明需要提供一种 离心风扇， 该离心风扇能够使其进风口处的气流流态更好， 增大风机出风压力， 提高风 机效率。
本发明还需要提供一种具有该离心风扇的干衣机。
根据本发明第一方面的离心风扇包括在其周边设有多个主叶片， 其特征在于， 在所 述离心风扇面向进风方向的面罩上设有多个沿径向分布的多个副叶片。
根据本发明的离心风扇能够有效降低面罩或电机罩的阻碍作用， 使离心风扇进风口 处的气流流态更好， 并实现了副叶片、 主叶片的两级增压提速， 显著增大离心风扇出口 气流压力， 提高风机效率。
根据本发明的一个实施例， 所述离心风扇的面罩为电机罩。
根据本发明的一个实施例， 所述离心风扇进一步包括： 轮圈， 所述轮圈上具有用于 空气流入的进风口； 以及轮盘， 所述轮盘设在所述轮圈下方且所述轮盘的中心区域被构 造成所述电机罩， 所述电机罩向上凸出且其顶部上设有连接轴套； 所述多个主叶片周向 间隔设在所述轮圈和所述轮盘之间， 相邻两个所述主叶片之间限定出第一气流通道； 所 述多个副叶片围绕所述连接轴套设在所述电机罩上， 相邻两个所述副叶片之间限定出第 二气流通道， 所述第一气流通道、 所述第二气流通道和所述进风口相互连通。
离心风扇转动时， 从进风口进入离心风扇的气流， 一部分会流到电机罩和主叶片之 间的间隙中， 并在离心风扇的高速旋转中， 被主叶片增压提速， 从第一气流通道排出； 其中另一部分气流在沿轴向流动的过程中， 可以在副叶片的引导作用下， 先沿第二气流 通道流动， 再流动到第一气流通道中并被排出。 由此， 避免了气流撞击到电机罩的顶部 表面上反弹、 回流而形成紊流， 入口气流的状态得到了较好的调整， 导风效率得到了大 大地提高。 而且， 流入到离心风扇内的气流， 可以先通过副叶片的增压提速， 再通过主 叶片的增压提速并排出， 风机出口压力和流速得到了进一步地提升。
综上， 根据本发明的离心风扇能够使其进风口处的气流流态更好、 避免紊流， 增大 气流压力、 提高流速， 提高风机效率。
另外， 根据本发明的离心风扇还可具有如下附加技术特征：
所述多个副叶片分为多组， 所述多组副叶片绕所述连接轴套均匀排列。 这样可以保 证整个离心风扇的质量的均匀性， 避免离心风扇在转动的过程中发生抖动。
优选地， 所述多个副叶片绕所述连接轴套均匀排列。 这样可以保证整个离心风扇的 质量的均匀性， 避免离心风扇在转动的过程中发生抖动
优选地， 所述副叶片的上表面与所述轮圈的上表面平齐。 由此可以进一步提升气流 流态的稳定性， 进一步地减少紊流。
优选地， 所述副叶片与所述主叶片的厚度相同。 由此气流的流向更趋合理。
优选地， 所述副叶片与所述主叶片的叶形同向。 这样可以使气流的流向趋于一致、 流动更加平顺， 保证了气流流动的稳定性。
优选地， 所述副叶片的流入角与所述主叶片的流入角相同。
优选地， 所述副叶片的流出角略小于所述主叶片的流出角。
由此， 可以有效降低气流从第二气流通道流向第一气流通道时的冲击损失， 确保流 动更加平顺。
所述轮圈、 所述轮盘、 所述多个主叶片和所述多个副叶片一体成型。 由此可以保证 轮圈、 轮盘、 多个主叶片和多个副叶片之间的连接的稳固程度。
所述电机罩的顶部表面形成为弧形表面或平面。
所述连接轴套与所述电机罩同轴设置。
根据本发明第二方面的干衣机， 包括风道、 以及根据本发明第一方面所述的离心风 扇， 所述离心风扇设置在所述风道内。
由于离心风扇能够使其进风口处的气流流态更好、 减少了入口紊流， 增大了气流压 力、 提高了流速， 提高了风机效率， 因此， 干衣机设置了离心风扇具有工作效率高， 性 能好等优点。
本发明的附加方面和优点将在下面的描述中部分给出， 部分将从下面的描述中变得 明显， 或通过本发明的实践了解到。 附图说明
本发明的上述和 /或附加的方面和优点从结合下面附图对实施例的描述中将变得明 显和容易理解， 其中：
图 1是根据本发明实施例的离心风扇的俯视图；
图 2是根据本发明实施例的离心风扇的侧视图；
图 3是根据本发明实施例的离心风扇的立体图；
图 4是根据本发明实施例具有离心风扇的干衣机的示意图。 具体实施方式
下面详细描述本发明的实施例， 所述实施例的示例在附图中示出， 其中自始至终相 同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附 图描述的实施例是示例性的， 仅用于解释本发明， 而不能理解为对本发明的限制。
在本发明的描述中， 需要理解的是， 术语 "中心" 、 "纵向" 、 "横向" 、 "上" 、
"下" 、 "前" 、 "后" 、 "左" 、 "右" 、 "竖直" 、 "水平" 、 "顶" 、 "底" 、 "内" 、 "外"等指示的方位或位置关系为基于附图所示的方位或位置关系， 仅是为了 便于描述本发明和简化描述， 而不是指示或暗示所指的装置或元件必须具有特定的方 位、 以特定的方位构造和操作， 因此不能理解为对本发明的限制。此外， 术语 "第一" 、 "第二" 仅用于描述目的， 而不能理解为指示或暗示相对重要性或者隐含指明所指示的 技术特征的数量。 由此， 限定有 "第一" 、 "第二" 的特征可以明示或者隐含地包括一 个或者更多个该特征。 在本发明的描述中， 除非另有说明， "多个" 的含义是两个或两 个以上。
在本发明的描述中， 需要说明的是， 除非另有明确的规定和限定， 术语 "安装" 、 "相连" 、 "连接" 应做广义理解， 例如， 可以是固定连接， 也可以是可拆卸连接， 或 一体地连接； 可以是机械连接， 也可以是电连接； 可以是直接相连， 也可以通过中间媒 介间接相连， 可以是两个元件内部的连通。 对于本领域的普通技术人员而言， 可以具体 情况理解上述术语在本发明中的具体含义。
下面参考图 1-图 4描述根据本发明实施例的离心风扇 100。 离心风扇 100是干衣机 200或洗干一体机的一个重要的零部件， 离心风扇 100通过电机的驱动而旋转。 所述干 衣机 200包括风道 10、 以及设置在风道 10内的离心风扇 100。 当然， 干衣机 200还包 括用于容纳衣物的容纳筒、 电器系统、 外壳等部件， 由于此部分为已知且为本领域普通 技术人员所熟知， 因此不再赘述。
根据本发明实施例的离心风扇 100， 包括在其周边设有的多个主叶片 3， 在所述离 心风扇 100面向进风方向的面罩上设有多个沿径向分布的副叶片 4。在一具体实施例中， 所述离心风扇的面罩为电机罩 21，其中用于驱动离心风扇 100的电机可以设在该电机罩 21的后方。
本发明一种实施例的离心风扇 100， 如图 1-图 3所示， 进一步包括轮圈 1和轮盘 2。 为了描述的方便， 在本发明下述实施例中， 将以轮圈 1和轮盘 2沿上下方向定位为 例， 描述离心风扇 100的结构。 在本发明的实施例的描述中： "上下方向" 例如图 2和 图 3中的箭头所示。 但是需要说明的是， 该方向的指示只是出于示例的目的， 而不是为 了限制本发明的保护范围。
如图 3所示的立体图， 轮圈 1上具有用于空气流入的进风口。 轮圈 1为环形， 该环 形的内圈限定出了该进风口， 离心风扇 100工作时， 空气可通过该进风口进入到离心风 扇 100中形成入口气流。
轮盘 2可设在轮圈 1下方， 轮盘 2的中心区域被构造成向上凸出的电机罩 21， 电机 罩 21的顶部上设有连接轴套 22， 电机的输出轴可以套设在该连接轴套 22上， 以使离心 风扇 100在电机的驱动下旋转。
多个主叶片 3周向间隔设在轮圈 1和轮盘 2之间， 相邻两个主叶片 3之间限定出第 一气流通道 31。从进风口进入到离心风扇 100中的气流，在离心风扇 100的高速旋转所 产生的离心力的作用下， 会沿着离心风扇 100的径向， 从第一气流通道 31排出。
多个副叶片 4设在轮盘 2上， 具体地， 多个副叶片 4设在位于轮盘 2中心区域的电 机罩 21上， 并且多个副叶片 4围绕连接轴套 22周向排列设置， 相邻两个副叶片 4之间 限定出第二气流通道 41。 第一气流通道 31、 第二气流通道 41和进风口相互连通。 气体 从进风口进入到离心风扇 100后， 不仅可以从第一气流通道 31直接排出， 也可以通过 第二气流通道 41再从第一气流通道 31排出。
具体而言， 离心风扇 100转动时， 从进风口进入离心风扇 100的气流， 一部分会流 到电机罩 21和主叶片 3之间的间隙中， 并在离心风扇 100的高速旋转中， 被主叶片 3 增压提速， 从第一气流通道 31 排出。 其中另一部分气流在沿轴向流动的过程中， 可以 在副叶片 4的引导作用下， 先沿第二气流通道 41流动， 再流动到第一气流通道 31中并 被排出。 由此， 避免了气流撞击到电机罩 21 的顶部表面上反弹、 回流而形成紊流， 入 口气流的状态得到了较好的改善， 导风效率得到了明显的提高。 而且， 流入到离心风扇 100内的气流， 可以先通过副叶片 4的增压提速， 再通过主叶片 3的增压提速并排出， 气流的压力得到了进一步地提升， 进而在一定程度上提高了气流流速。 综上， 根据本发明实施例的离心风扇 100能够使其进风口处的气流流态更好、 减少 了入口紊流， 增大气流压力、 提高流速， 提高导风效率。
如图 3所示， 在本发明的一个实施例中， 当电机的顶部为弧形时， 电机罩 21 的顶 部表面可以形成为弧形表面， 连接轴套 22与电机罩 21 同轴设置， 即连接轴套 22与电 机罩 21 的轴心重合。 由此可以使离心风扇 100的结构更加合理， 电机在带动离心风扇 100转动时更加稳定。
在本发明的另一个实施例中， 当电机的顶部为平面时， 电机罩 21 的顶部表面可以 形成为平面， 连接轴套 22与电机罩 21同轴设置， 即连接轴套 22设在电机罩 21的中心 处。 由此可以使电机罩 21更加适应电机的形状， 电机在带动离心风扇 100转动时更加 稳定。
当然本发明并不限于此， 电机罩 21 的形状可以根据电机的不同结构而具有不同的 形状， 此处仅出于示例的目的， 而不是为了限制本发明的保护范围。
在本发明的一个优选地示例中， 多个副叶片 4可以分为多组， 多组副叶片 4可以绕 连接轴套 22均匀排列。 这样可以保证整个离心风扇 100的质量的均匀性， 避免离心风 扇 100在转动的过程中发生抖动， 进而避免进入到离心风扇 100内的气流混乱。
具体而言， 假设副叶片 4一共包括二十四个， 共分为六个组， 每组包括四个副叶片 4， 其中六组叶片可以绕连接轴套 22均匀排列， 这里可以理解的是， 六组叶片之间的间 距是均匀地， 并且六组叶片中， 每一组的结构、 形状、 尺寸等均是相同地， 由此使离心 风扇 100的结构的和质量分布更为均匀。 其中， 每组叶片中的四个副叶片 4之间可以根 据实际导风需要进行相应地设计排布。
在本发明的一个更为优选地示例中， 如图 1所示， 多个副叶片 4绕连接轴套 22均 匀排列。 也就是说， 上述的二十四个副叶片 4绕连接轴套 22均匀排列， 由此可以进一 步提高离心风扇 100的质量的均匀性，进一步避免离心风扇 100在转动的过程中的抖动， 进而使进入到离心风扇 100内的气流更加有序。
在本发明的一个实施例中， 主叶片 3和副叶片 4同为前向叶片或同为后向叶片。 如 前所述， 副叶片 4和主叶片 3的流出角相近， 也即基本确定了叶形同向， 若流出角的角 度大于 90° ， 即可认为是前向叶形； 若流出角的角度小于 90° ， 即可认为是后向叶形。 具体而言， 副叶片 4的弯曲方向与主叶片 3的弯曲方向相同。 例如， 主叶片 3若是绕连 接轴套 22顺时针向内弯曲，则副叶片 4也可以是绕连接轴套 22顺时针向内弯曲。由此， 流入到第二气流通道 41内的气流可以按照原有的流动方向进入到第一气流通道 31内， 这样可以使气流的流向趋于一致、 流动更加平顺， 保证了气流流动的稳定性。
在本发明的一个实施例中， 副叶片 4的流入角可与主叶片 3的流入角相同。 这样可 以进一步地保证气流流动方向的一致性， 并且气流从第二气流通道 41 流向第一气流通 道 31时， 更加平稳顺滑， 减小了气流的入口冲击损失。
更进一步地， 副叶片 4的流出角可略小于主叶片 3的流出角。 由此， 可以使气流从 第二气流通道 41流向第一气流通道 31时， 进一步保证平稳的特性， 流态更加一致。
在本发明的一些实施例中， 副叶片 4与主叶片 3的厚度相同。 这样， 气流在从第二 气流通道 41流向第一气流通道 31时， 气流的分布更加均匀， 可以保证气流在离心风扇 100内的流动更加平稳。
在本发明的一些优选地实施例中， 副叶片 4的上表面不超过轮圈 1的上表面， 由此 使气流流态更加稳定， 减少紊流。
进一步地， 副叶片 4的上表面与轮圈 1的上表面平齐， 由此可以进一步提升气流流 态的稳定性， 进一步地减少紊流。
在本发明的一个实施例中， 轮圈 1、 轮盘 2、 多个主叶片 3和多个副叶片 4一体成 型。 具体地， 每个副叶片 4一体形成在轮盘 2的电机罩 21上， 每个主叶片 3的上端和 下端分别与轮圈 1和轮盘 2—体连接。 可选地， 轮圈 1、 轮盘 2、 主叶片 3和副叶片 4 可以均为塑料件并且通过注塑的方法一体成型。 由此， 不仅可以保证轮圈 1、 轮盘 2、 多个主叶片 3和多个副叶片 4之间的连接的稳固程度， 而且通过利用塑料件来制造离心 风扇 100， 可以降低制造材料的成本， 减轻离心风扇 100的重量。
本发明还提出了一种离心风机， 该离心风机包括根据本发明上述实施例的离心风扇 100。 由于离心风扇 100能够使其进风口处的气流流态更好、 减少了入口紊流， 增大了 气流压力、 提高了流速， 提高了导风效率， 因此， 设置了离心风扇 100的离心风机具有 导风效率高， 性能好等优点。
根据本发明实施例的离心风机还包括电机和蜗壳， 其中电机和离心风扇 100均可设 在该蜗壳内。
具体地， 蜗壳可具有上端板、 下端板和沿周向设置的侧壁板。 其中蜗壳的侧壁板、 上端板和下端板共同限定出容纳空间， 电机和离心风扇 100均设在该容纳空间内。
上端板上可具有用于空气进入的第二进风口， 离心风扇 100设在蜗壳内时， 第一进 风口和第二进风口同心。 下端板上可以设有用于容纳电机的容纳槽， 电机设在该容纳槽 内， 离心风扇 100设在蜗壳内时， 电机罩 21可遮挡该电机， 即该电机罩 21与该容纳槽 可以限定出安装空间， 电机容置于该安装空间内， 且电机的输出轴与连接轴套 22连接。 侧壁板上具有用于气流流出的出风口，这样，通过第二进风口和第一进风口进入的气流， 最终可从该出风口排出离心风机。 由于本部分为已知且为本领域普通技术人员所熟知， 因此不再详述。 下面简要描述离心风机的工作过程。
启动电机， 电机的输出轴可带动离心风扇 100旋转。 离心风机周围的空气依次通过 第二进风口和第一进风口进入到离心风机内， 以形成入口气流。 入口气流的一部分可以 直接从电机罩 21和主叶片 3之间的间隙流向第一气流通道 31， 并排出到离心风扇 100 之外。 另一部分可以首先流入到第二气流通道 41内， 在第二气流通道 41增压提速后， 流入第一气流通道 31，并被排出到离心风扇 100之外。从离心风扇 100排出的高速气流， 进入到蜗壳内经过汇聚， 从出风口中排出， 完成了离心风机对于气流的排送。
根据本发明实施例的干衣机 200设置离心风扇 100，以对风道 10内的气流起到驱动 作用， 促进气流循环， 以使衣物干燥的更快、 更加均匀。 由于离心风扇 100能够使其进 风口处的气流流态更好、 减少了入口紊流， 增大了气流压力、 提高了流速， 提高了风机 效率， 因此， 干衣机 200设置了离心风扇 100具有工作效率高， 性能好等优点。
在本说明书的描述中， 参考术语 "一个实施例" 、 "一些实施例" 、 "示意性实施 例" 、 "示例" 、 "具体示例" 、 或 "一些示例"等的描述意指结合该实施例或示例描 述的具体特征、 结构、 材料或者特点包含于本发明的至少一个实施例或示例中。 在本说 明书中， 对上述术语的示意性表述不一定指的是相同的实施例或示例。 而且， 描述的具 体特征、 结构、 材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结 合。
尽管已经示出和描述了本发明的实施例， 本领域的普通技术人员可以理解： 在不脱 离本发明的原理和宗旨的情况下可以对这些实施例进行多种变化、 修改、 替换和变型， 本发明的范围由权利要求及其等同物限定。

Claims

权利要求书
1、 一种离心风扇， 包括在其周边设有多个主叶片， 其特征在于， 在所述离心风扇面向 进风方向的面罩上设有多个沿径向分布的多个副叶片。
2、 根据权利要求 1所述的用于干衣机的离心风扇， 其特征在于， 所述离心风扇的面罩 为电机罩。
3、 如权利要求 2所述的用于干衣机的离心风扇， 其特征在于， 所述离心风扇进一步包 括：
轮圈， 所述轮圈上具有用于空气流入的进风口； 以及
轮盘， 所述轮盘设在所述轮圈下方且所述轮盘的中心区域被构造成所述电机罩， 所述电 机罩向上凸出且其顶部上设有连接轴套，
多个所述多个主叶片周向间隔设在所述轮圈和所述轮盘之间，相邻两个所述主叶片之间 限定出第一气流通道，
多个副叶片所述多个副叶片围绕所述连接轴套设在所述电机罩上，相邻两个所述副叶片 之间限定出第二气流通道， 所述第一气流通道、 所述第二气流通道和所述进风口相互连通。
4、 根据权利要求 3所述的离心风扇， 其特征在于， 所述多个副叶片分为多组， 所述多 组副叶片绕所述连接轴套均匀排列。
5、 根据权利要求 4所述的离心风扇， 其特征在于， 所述多个副叶片绕所述连接轴套均 匀排列。
6、 根据权利要求 3所述的离心风扇， 其特征在于， 所述副叶片的上表面与所述轮圈的 上表面平齐。
7、 根据权利要求 3所述的离心风扇， 其特征在于， 所述副叶片与所述主叶片的厚度相 同。
8、 根据权利要求 3所述的离心风扇， 其特征在于， 所述副叶片与所述主叶片的叶形同 向。
9、 根据权利要求 3所述的离心风扇， 其特征在于， 所述副叶片的流入角与所述主叶片 的流入角相同。
10、 根据权利要求 3所述的离心风扇， 其特征在于， 所述副叶片的流出角略小于所述主 叶片的流出角。
11、 根据权利要求 3所述的离心风扇， 其特征在于， 所述轮圈、 所述轮盘、 所述多个主 叶片和所述多个副叶片一体成型。
12、 根据权利要求 3所述的离心风扇， 其特征在于， 所述电机罩的顶部表面形成为弧形 表面或平面。
13、 根据权利要求 12所述的离心风扇， 其特征在于， 所述连接轴套与所述电机罩同轴
14、 一种干衣机， 其特征在于， 包括风道、 以及如权利要求 1-13所述的离心风扇， 所 述离心风扇设置在所述风道内。
PCT/CN2013/073321 2013-03-28 2013-03-28 离心风扇和具有其的干衣机 WO2014153748A1 (zh)

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CN114941636A (zh) * 2022-06-28 2022-08-26 华中科技大学 一种前置增压多翼离心叶轮及离心风机

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CN114941636B (zh) * 2022-06-28 2023-06-16 华中科技大学 一种前置增压多翼离心叶轮及离心风机

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