WO2023108921A1

WO2023108921A1 - Fan and cleaning device with same

Info

Publication number: WO2023108921A1
Application number: PCT/CN2022/079376
Authority: WO
Inventors: 丁荣
Original assignee: 广东威灵电机制造有限公司
Priority date: 2021-12-16
Filing date: 2022-03-04
Publication date: 2023-06-22

Abstract

A fan, comprising: a housing assembly; a fan cover (200), which is mounted on the housing assembly and fits with the housing assembly to form an accommodating cavity; a wind wheel (300) provided in the accommodating cavity and fitting with a side wall of the accommodating cavity to form an air inlet channel (101); a first diffuser (400) provided in the accommodating cavity and comprising first fan blades (410) and a mounting hub, the mounting hub, the first fan blades (410) and the side wall of the accommodating cavity together defining a first diffusion channel (102); the air inlet channel (101) being in communication with the first diffusion channel (102) in series; multiple first fan blades (410) are provided on an outer edge of the mounting hub, the end of a front edge (411) of a first fan blade (410) connected to the mounting hub being a first end, the end of the front edge (411) of the first fan blade (410) distant from the mounting hub being a second end, and the second end being closer to the air inlet channel (101) than the first end. This can reduce fan noise, and reduce the effect on noise caused by a rotation speed increasing. Further comprised is a cleaning device.

Description

风机及其清洁设备Fans and their cleaning equipment

相关申请的交叉引用Cross References to Related Applications

本申请要求于2021年12月16日提交的申请号为202111547204.3、名称为“风机及其清洁设备”，以及于2021年12月16日提交的申请号为202123197264.5、名称为“风机及其清洁设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。This application requires the application number 202111547204.3 submitted on December 16, 2021, entitled "Fan Fan and Its Cleaning Equipment", and the application number 202123197264.5 submitted on December 16, 2021, named "Fan Fan and Its Cleaning Equipment" The priority of the Chinese patent application ", the entire content of which is incorporated in this application by reference.

技术领域technical field

本公开涉及风机技术领域，特别涉及一种风机及其清洁设备。The present disclosure relates to the technical field of fans, in particular to a fan and its cleaning equipment.

背景技术Background technique

近几年高速无刷电机逐渐向高功率、小尺寸及轻量化方向发展，同时，国内外对吸尘器这类家用电器的噪音要求越来越高，但受尺寸限制，风机功率越高转速就越高，转速提升的同时会带来噪音的提高，转速带来的噪音问题厄待解决。In recent years, high-speed brushless motors have gradually developed towards high power, small size and light weight. At the same time, the noise requirements for household appliances such as vacuum cleaners are getting higher and higher at home and abroad. High, the increase in speed will also increase the noise, and the noise problem caused by the speed needs to be solved.

发明内容Contents of the invention

本公开旨在至少部分解决现有技术中存在的技术问题之一。为此，本公开提出一种风机及其清洁设备，能够降低风机的噪音，降低转速升高时带来的噪音影响。The present disclosure aims at at least partially solving one of the technical problems existing in the prior art. For this reason, the present disclosure proposes a fan and its cleaning equipment, which can reduce the noise of the fan and reduce the impact of noise caused by the increase of the rotating speed.

根据本公开的第一方面实施例的风机，包括：机壳组件；风罩，安装在所述机壳组件，所述风罩与所述机壳组件配合形成容纳腔；风轮，设置在所述容纳腔内，所述风轮与所述容纳腔的侧壁配合限定出进气通道；第一扩压器，设置在所述容纳腔内，包括有第一风叶和安装毂，所述安装毂、所述第一风叶以及所述容纳腔的侧壁配合限定出第一扩压通道，所述进气通道与所述第一扩压通道依次连通，所述安装毂的外沿设置有多个第一风叶，沿气流方向，第一风叶具有前缘，第一风叶的前缘与安装毂连接的一端为第一端，第一风叶的前缘远离安装毂的一端为第二端，沿所述安装毂的轴向，所述第二端比所述第一端更靠近所述进气通道。The fan according to the first aspect of the present disclosure includes: a casing assembly; a wind cover installed on the casing assembly, and the wind cover cooperates with the casing assembly to form an accommodation chamber; a wind wheel is arranged on the casing assembly. In the accommodating cavity, the wind wheel cooperates with the side wall of the accommodating cavity to define an air intake channel; the first diffuser is arranged in the accommodating cavity, including a first fan blade and a mounting hub, and the The installation hub, the first blade, and the side wall of the accommodation chamber cooperate to define a first diffusion channel, the air intake channel communicates with the first diffusion channel in turn, and the outer edge of the installation hub is arranged There are a plurality of first blades, along the airflow direction, the first blade has a leading edge, the end of the leading edge of the first blade connected to the mounting hub is the first end, and the leading edge of the first blade is away from the end of the mounting hub is the second end, and along the axial direction of the installation hub, the second end is closer to the intake passage than the first end.

根据本公开第一方面实施例的风机，至少具有如下有益效果：风轮转动时，空气进入到进气通道中，沿安装毂的轴向，通过设置第二端比第一端更靠近进风通道，使气流从进气通道过渡到第一扩压通道时，气流更早地接触第一风叶，气流更加平滑顺畅地进入到第一扩压通道，减少气流的扩散和冲击损失，降低气动噪音。The fan according to the embodiment of the first aspect of the present disclosure has at least the following beneficial effects: when the wind rotor rotates, the air enters the air intake passage, and along the axial direction of the installation hub, by setting the second end closer to the air intake than the first end Channel, so that when the airflow transitions from the intake channel to the first diffuser channel, the airflow contacts the first fan blade earlier, and the airflow enters the first diffuser channel more smoothly, reducing the diffusion and impact loss of the airflow, and reducing the aerodynamic force noise.

根据本公开的一些实施例，限定所述第一端与所述第二端之间的连线为第一连线，所述第一连线与所述安装毂的径向线之间的夹角a，所述a满足：25°≤a≤70°。According to some embodiments of the present disclosure, the connection line between the first end and the second end is defined as a first connection line, and the clamp between the first connection line and the radial line of the installation hub Angle a, said a satisfies: 25°≤a≤70°.

根据本公开的一些实施例，所述风轮包括有第二风叶，沿所述风轮的轴向，所述第二风叶的宽度逐渐减少。According to some embodiments of the present disclosure, the wind wheel includes second wind blades, and the width of the second wind blades decreases gradually along the axial direction of the wind wheel.

根据本公开的一些实施例，所述第二风叶的最大宽度与所述第二风叶的最小宽度的比值为x，满足：1.3≤x≤2.1。According to some embodiments of the present disclosure, the ratio of the maximum width of the second blade to the minimum width of the second blade is x, which satisfies: 1.3≤x≤2.1.

根据本公开的一些实施例，所述第二风叶与所述风罩的内壁间隙配合，所述第二风叶与所述风罩的内壁之间的距离为d，所述d满足：0.12≤d≤0.5mm。According to some embodiments of the present disclosure, the second vane is in clearance fit with the inner wall of the wind shield, the distance between the second vane and the inner wall of the wind shield is d, and the d satisfies: 0.12 ≤d≤0.5mm.

根据本公开的一些实施例，所述第二风叶的数量为z2，所述第一风叶的数量为z1，满足：z2＜z1，且7≤z2≤9。According to some embodiments of the present disclosure, the number of the second blades is z2, and the number of the first blades is z1, satisfying: z2<z1, and 7≤z2≤9.

根据本公开的一些实施例，所述机壳组件还设置有第二扩压器，所述第二扩压器包括有内筒体、外筒体和第三风叶，所述内筒体与所述安装毂对接，所述第三风叶沿周向分布在所述内筒体的外周，所述内筒体、所述外筒体和所述第三风叶之间限定出第二扩压通道，所述进气通道、所述第一扩压通道和所述第二扩压通道依次连通。According to some embodiments of the present disclosure, the casing assembly is further provided with a second diffuser, the second diffuser includes an inner cylinder, an outer cylinder and a third blade, and the inner cylinder and The mounting hubs are butted together, the third fan blades are circumferentially distributed on the outer periphery of the inner cylinder, and a second expansion blade is defined between the inner cylinder, the outer cylinder and the third fan blades. pressure channel, the intake channel, the first diffuser channel and the second diffuser channel communicate in sequence.

根据本公开的一些实施例，沿所述第二扩压器的轴向，所述第三风叶的尾端与所述内筒体的尾端的距离为H1，所述第三风叶的尾端与所述外筒体的尾端的距离为H2，满足：H2＞H1。According to some embodiments of the present disclosure, along the axial direction of the second diffuser, the distance between the tail end of the third fan blade and the tail end of the inner cylinder is H1, and the tail end of the third fan blade The distance between the end and the tail end of the outer cylinder is H2, which satisfies: H2>H1.

根据本公开的一些实施例，所述第三风叶的数量为z3，所述第一风叶的数量为z1，满足z3＞z1。According to some embodiments of the present disclosure, the number of the third blades is z3, the number of the first blades is z1, and z3>z1 is satisfied.

根据本公开的一些实施例，沿所述第一扩压器的轴向，所述进气通道的轴向长度为h1，所述第一扩压通道的轴向长度为h2，所述第二扩压通道的轴向长度为h3，满足：h1≥h2≥h3。According to some embodiments of the present disclosure, along the axial direction of the first diffuser, the axial length of the intake passage is h1, the axial length of the first diffuser passage is h2, and the second The axial length of the diffuser channel is h3, which satisfies: h1≥h2≥h3.

根据本公开的第二方面实施例的清洁设备，包括有根据本公开第一方面实施例所述的风机。The cleaning device according to the embodiment of the second aspect of the present disclosure includes the fan according to the embodiment of the first aspect of the present disclosure.

根据本公开第二方面实施例的清洁设备，至少具有如下有益效果：风轮转动时，空气沿着风罩的进气端进入到进气通道中，气流从进气通道过渡到第一扩压通道时，经过第一风叶后，气流更加平滑顺畅地进入到第一扩压通道，减少气流的扩散和冲击损失，降低气动噪音。The cleaning device according to the second aspect of the present disclosure has at least the following beneficial effects: when the wind wheel rotates, the air enters the air intake channel along the air intake end of the wind cover, and the air flow transitions from the air intake channel to the first diffuser When passing through the first fan blade, the air flow enters the first diffuser channel more smoothly, reducing the diffusion and impact loss of the air flow, and reducing aerodynamic noise.

本公开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，或通过本公开的实践了解到。Additional aspects and advantages of the disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the disclosure.

附图说明Description of drawings

本公开的上述和/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：The above and/or additional aspects and advantages of the present disclosure will become apparent and comprehensible from the description of the embodiments in conjunction with the following drawings, in which:

图1为本公开第一方面实施例的风机的示意图；FIG. 1 is a schematic diagram of a fan according to an embodiment of the first aspect of the present disclosure;

图2为图1中A处的局部放大示意图；Fig. 2 is the partially enlarged schematic diagram of place A in Fig. 1;

图3为本公开第一方面实施例的风机的气体流动方向示意图；Fig. 3 is a schematic diagram of the gas flow direction of the fan according to the embodiment of the first aspect of the present disclosure;

图4为本公开第一方面实施例的风机中第一扩压器的示意图；Fig. 4 is a schematic diagram of a first diffuser in a fan according to an embodiment of the first aspect of the present disclosure;

图5为本公开第一方面实施例的风机中第一扩压器的剖视图；Fig. 5 is a cross-sectional view of the first diffuser in the fan according to the embodiment of the first aspect of the present disclosure;

图6为本公开第一方面实施例的风机中风轮的示意图；Fig. 6 is a schematic diagram of a wind wheel in a fan according to an embodiment of the first aspect of the present disclosure;

图7为本公开第一方面实施例的风机中风轮和风罩的配合示意图；Fig. 7 is a schematic diagram of the coordination of the wind wheel and the wind shield in the fan according to the embodiment of the first aspect of the present disclosure;

图8为图7中B处局部放大示意图；以及Fig. 8 is a partially enlarged schematic diagram of place B in Fig. 7; and

图9为本公开第一方面实施例的风机中第二扩压器的仰视角度的示意图。Fig. 9 is a schematic diagram of the bottom view angle of the second diffuser in the blower according to the embodiment of the first aspect of the present disclosure.

附图标记说明：Explanation of reference signs:

进气通道101、第一扩压通道102、第二扩压通道103、过渡通道104；Intake channel 101, first diffuser channel 102, second diffuser channel 103, transition channel 104;

风罩200； wind shield 200;

风轮300、第二风叶310、轮毂320、底板330； Wind wheel 300, second wind blade 310, hub 320, bottom plate 330;

第一扩压器400、弧面401、第一风叶410、第一风叶的前缘411、第一风叶的后缘412、第一根部413、第一外缘414；The first diffuser 400, the arc surface 401, the first blade 410, the front edge 411 of the first blade, the trailing edge 412 of the first blade, the first root 413, and the first outer edge 414;

第二扩压器500、第三风叶510、外筒体520、第一抵接部521、第一定位阶梯522、内筒体530、凸台540。The second diffuser 500 , the third vane 510 , the outer cylinder 520 , the first contact portion 521 , the first positioning step 522 , the inner cylinder 530 , and the boss 540 .

具体实施方式Detailed ways

下面详细描述本公开的实施例，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，仅用于解释本公开，而不能理解为对本公开的限制。Embodiments of the present disclosure are described in detail below, examples of which are illustrated in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present disclosure and should not be construed as limiting the present disclosure.

在本公开的描述中，需要理解的是，涉及到方位描述，例如上、下、前、后、左、右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公开和简化描述，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公开的限制。In the description of the present disclosure, it should be understood that the orientation descriptions, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the drawings, and only In order to facilitate the description of the present disclosure and simplify the description, it does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the present disclosure.

在本公开的描述中，若干的含义是一个或者多个，多个的含义是两个以上，大于、小于、超过等理解为不包括本数，以上、以下、以内等理解为包括本数。如果有描述到第一、第二只是用于区分技术特征为目的，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或者隐含指明所指示的技术特征的先后关系。In the description of the present disclosure, several means one or more, and multiple means two or more. Greater than, less than, exceeding, etc. are understood as excluding the original number, and above, below, within, etc. are understood as including the original number. If the description of the first and second is only for the purpose of distinguishing the technical features, it cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features relation.

本公开的描述中，除非另有明确的限定，设置、安装、连接等词语应做广义理解，所属技术领域技术人员可以结合技术方案的具体内容合理确定上述词语在本公开中的具体含义。In the description of the present disclosure, unless otherwise clearly defined, words such as setting, installation, and connection should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present disclosure in combination with the specific content of the technical solution.

参照图1、图2和图4，本公开的第一方面实施例的风机，包括有：机壳组件；风罩200，安装在机壳组件上，风罩200与机壳组件配合形成容纳腔；风轮300，可转动地安装在容纳腔内，风轮300与容纳腔的侧壁配合限定出进气通道，通过风轮300转动将空气源源不断地导入到进气通道内，并沿着进气通道流出；第一扩压器400，设置在容纳腔内，包括有第一风叶410和安装毂420，第一风叶410设置在安装毂420的外周面，安装毂420与容纳腔的侧壁配合限定出第一扩压通道102，进气通道101与第一扩压通道102依次对接，多个第一风叶410间隔设置在安装毂420的外周面，沿容纳腔内气体流动方向，第一风叶410设置在进气通道101的下游，第一风叶410的前缘411向上倾斜设置。Referring to Fig. 1, Fig. 2 and Fig. 4, the fan according to the embodiment of the first aspect of the present disclosure includes: a casing assembly; a windshield 200 installed on the casing assembly, and the windshield 200 cooperates with the casing assembly to form an accommodation cavity The wind wheel 300 is rotatably installed in the chamber, and the wind wheel 300 cooperates with the side wall of the chamber to define an air intake channel, and the air is continuously introduced into the air intake channel through the rotation of the wind wheel 300, and along the The air intake channel flows out; the first diffuser 400 is arranged in the accommodation chamber, and includes a first fan blade 410 and an installation hub 420, the first fan blade 410 is arranged on the outer peripheral surface of the installation hub 420, and the installation hub 420 and the accommodation chamber The side walls cooperate to define the first diffuser channel 102, the intake channel 101 and the first diffuser channel 102 are sequentially connected, a plurality of first fan blades 410 are arranged at intervals on the outer peripheral surface of the mounting hub 420, and flow along the air in the accommodating chamber direction, the first vane 410 is arranged downstream of the air intake passage 101 , and the front edge 411 of the first vane 410 is arranged obliquely upward.

可以理解的是，第一风叶410具有前缘411和后缘412，设定第一风叶410的前缘411与安装毂420连接的一端为第一端，第一风叶410的前缘411远离安装毂420的一端为第二端，沿安装毂420的轴向，第二端比第一端更靠近进风通道，限定第一端与第二端之间的连线为第一连线，第一连线与安装毂420的径向线之间的夹角为第一风叶410的夹角a，满足：25°≤a≤70°。It can be understood that the first fan blade 410 has a front edge 411 and a rear edge 412, and the end connecting the front edge 411 of the first fan blade 410 to the mounting hub 420 is set as the first end, and the front edge of the first fan blade 410 The end of 411 away from the installation hub 420 is the second end, along the axial direction of the installation hub 420, the second end is closer to the air inlet channel than the first end, and the line between the first end and the second end is defined as the first connection line. line, the included angle between the first connecting line and the radial line of the installation hub 420 is the included angle a of the first blade 410 , which satisfies: 25°≤a≤70°.

可以理解的是，风轮300转动时，空气在风轮300的导向下进入到进气通道101中，第一风叶410的前缘411向上倾斜设置，即沿安装毂420的轴向，第二端比第一更靠近进气通道的出风口，使第一风叶410的前缘411离进气通道101的出风端更近，气流从进气通道101过渡到第一扩压通道102时，气流从进气通道101的出风端吹出后，更快地与第一风叶410接触，并被第一风叶410承托，减少气流的扩散，使气流顺着第一风叶410平滑顺畅地流入到第一扩压通道102中，降低气流的冲击损失，降低气动噪音，同时提高风机的效率。It can be understood that when the wind wheel 300 rotates, the air enters the air intake channel 101 under the guidance of the wind wheel 300, and the front edge 411 of the first wind blade 410 is inclined upward, that is, along the axial direction of the installation hub 420, the second The two ends are closer to the air outlet of the air intake passage than the first, so that the front edge 411 of the first fan blade 410 is closer to the air outlet end of the air intake passage 101, and the airflow transitions from the air intake passage 101 to the first diffuser passage 102 When the airflow is blown out from the air outlet end of the air intake channel 101, it contacts the first blade 410 faster and is supported by the first blade 410, reducing the diffusion of the airflow and making the airflow follow the first blade 410 It smoothly flows into the first diffuser channel 102 , reduces the impact loss of the air flow, reduces the aerodynamic noise, and improves the efficiency of the fan at the same time.

需要说明的是，通过第一扩压通道102与进气通道101对接，使将风轮300转动形成的气流更加充分地转换成静压能，从而提高电风机的整体效率。It should be noted that, through the connection between the first diffuser channel 102 and the intake channel 101, the air flow formed by rotating the wind wheel 300 can be more fully converted into static pressure energy, thereby improving the overall efficiency of the electric fan.

可以理解的是，参照图1和图4，第一风叶410具有多个且沿第一扩压器400的外沿周向设置，第一风叶410能够对来自进气通道101的气流进行加压，提升气流的压力，将动能转化为静压能，气流动能充分转化成气体的压力能，减少气体因冲击造成的动能损失，从而增加了电风机的效率。It can be understood that, referring to FIG. 1 and FIG. 4 , there are a plurality of first fan blades 410 arranged along the outer circumference of the first diffuser 400 , and the first fan blades 410 can control the airflow from the intake passage 101 . Pressurization increases the pressure of the airflow, converts the kinetic energy into static pressure energy, and fully converts the kinetic energy of the airflow into the pressure energy of the gas, reducing the kinetic energy loss caused by the impact of the gas, thereby increasing the efficiency of the electric fan.

可以理解的是，参照图4，沿第一扩压器400的径向，第一风叶410靠近安装毂420外周面的一端为第一风叶410的根部即第一根部413，第一风叶410远离安装毂420外周面的一端为第一风叶410的外缘即第一外缘414。第一风叶410的厚度从第一根部413向第一外缘414逐渐减小。第一根部413的厚度较大时，能够减小第一风叶410根部区域的气流通道的截面积，从而能够减少第一风叶410根部区域气流的流动分离。第一扩压通道 102中，第一根部413区域的气流小，第一外缘414区域的气流大。第一风叶410的第一根部413至第一外缘414的厚度逐渐减小，能够在远离第一扩压器400的方向上适当增大气流的流通面积，从而能够减小气流的流动损失。It can be understood that, referring to FIG. 4 , along the radial direction of the first diffuser 400 , the end of the first vane 410 close to the outer peripheral surface of the installation hub 420 is the root of the first vane 410 , that is, the first root 413 , and the first vane 410 is the first root 413 . The end of the blade 410 away from the outer peripheral surface of the mounting hub 420 is the outer edge of the first blade 410 , that is, the first outer edge 414 . The thickness of the first vane 410 gradually decreases from the first root 413 to the first outer edge 414 . When the thickness of the first root portion 413 is relatively large, the cross-sectional area of the airflow channel at the root region of the first fan blade 410 can be reduced, thereby reducing flow separation of the airflow at the root region of the first fan blade 410 . In the first diffuser channel 102, the airflow in the area of the first root 413 is small, and the airflow in the area of the first outer edge 414 is large. The thickness from the first root 413 to the first outer edge 414 of the first vane 410 gradually decreases, which can appropriately increase the flow area of the airflow in the direction away from the first diffuser 400, thereby reducing the flow loss of the airflow .

可以理解的是，参照图4，沿着气流的流动方向，第一风叶410沿第一扩压器400的周向向下延伸，第一风叶410从第一扩压通道102的进风端延伸至第一扩压通道102的出风端，增强第一风叶410的导流作用，使气流在第一扩压通道102内能够沿着第一风叶410流动，同时延长气流在第一扩压通道102内的行程，使气流在流动的过程中一直受到第一风叶410的导向，降低气流的湍急程度，降低气动噪音，提高第一扩压通道102的效率。It can be understood that, referring to FIG. 4 , along the flow direction of the airflow, the first vane 410 extends downward along the circumference of the first diffuser 400 , and the first vane 410 is drawn from the first diffuser passage 102 The end extends to the air outlet end of the first diffuser channel 102 to enhance the flow guiding effect of the first fan blade 410, so that the air flow can flow along the first fan blade 410 in the first diffuser channel 102, and at the same time extend the air flow at the second A stroke in the diffuser channel 102 makes the airflow always be guided by the first vane 410 during the flow, which reduces the turbulence of the airflow, reduces the aerodynamic noise, and improves the efficiency of the first diffuser channel 102 .

可以理解的是，风轮300包括有轮毂320、底板330以及多个第二风叶310。轮毂320大致呈圆柱形，沿轮毂320的轴向设置有连接部340，连接部340用于与电风机的驱动装置的输出轴连接，驱动装置通过输出轴的转动驱动风轮300转动。沿轮毂320的中心轴线方向，外周面的直径从一端向另一端逐渐变大。底板330的外周面自后向前逐渐收窄，大致呈圆锥形，外周面的中心轴线与轮毂320的中心轴线重合，即底板330与轮毂320同轴设置，外周面较窄的一端为进风端，外周面较宽的一端为出风端。多个第二风叶310均匀设置在外周面上，即多个第二风叶310沿外周面的一周等间隔的排列。由于外周面呈前窄后宽的圆锥上，而第二风叶310设置在外周面上，所以第二风叶310的前端相对靠近轮毂320的中心轴线，第二风叶310的前端为前缘部，第二风叶310的前缘部相对远离轮毂320的中心轴线，第二风叶310的后端为后缘部，第二风叶310的后缘部朝向风轮300的旋转方向扭曲，第二风叶310的后端背向风轮300的旋转方向扭曲。It can be understood that the wind wheel 300 includes a hub 320 , a bottom plate 330 and a plurality of second blades 310 . The hub 320 is approximately cylindrical, and a connecting portion 340 is provided along the axial direction of the hub 320. The connecting portion 340 is used to connect with the output shaft of the driving device of the electric fan. The driving device drives the wind wheel 300 to rotate through the rotation of the output shaft. Along the direction of the central axis of the hub 320 , the diameter of the outer peripheral surface gradually increases from one end to the other end. The outer peripheral surface of the bottom plate 330 gradually narrows from the back to the front, and is roughly conical. end, the wider end of the outer peripheral surface is the air outlet end. The plurality of second fan blades 310 are uniformly arranged on the outer peripheral surface, that is, the plurality of second fan blades 310 are arranged at equal intervals along a circle of the outer peripheral surface. Since the outer peripheral surface is on a cone with a narrow front and a wide rear, and the second fan blade 310 is arranged on the outer peripheral surface, the front end of the second fan blade 310 is relatively close to the central axis of the hub 320, and the front end of the second fan blade 310 is a leading edge. The front edge of the second blade 310 is relatively far away from the central axis of the hub 320, the rear end of the second blade 310 is the rear edge, and the rear edge of the second blade 310 is twisted toward the rotation direction of the wind wheel 300, The rear end of the second blade 310 twists away from the rotation direction of the wind wheel 300 .

需要说明的是，风轮300为塑料件，而现有的风轮300通常由金属制成，金属风轮300的成本较高，采用塑料的风轮300可以有效降低生产成本。风轮300可以采用塑料制成的，因此其结构需要适应于注塑工艺中的脱模工序，第二风叶的前缘部和后缘部朝相反的方向扭曲，分型面位于第二风叶中段且垂直于轮毂320的中心轴线，由此风轮300的前半部分和后半部分，分别进行方向相反的旋转脱模。第二风叶前后两端的扭曲结构，使脱模能够顺利进行，且可以有效的减少风轮300的流体损失，提高风轮300的工作性能。It should be noted that the wind wheel 300 is a plastic part, while the existing wind wheel 300 is usually made of metal, and the cost of the metal wind wheel 300 is relatively high, and the use of the plastic wind wheel 300 can effectively reduce the production cost. The wind wheel 300 can be made of plastic, so its structure needs to be adapted to the demoulding process in the injection molding process. The front edge and the rear edge of the second blade are twisted in opposite directions, and the parting surface is located at the second blade. The middle section is perpendicular to the central axis of the hub 320 , so that the front half and the rear half of the wind wheel 300 are respectively rotated in opposite directions for demoulding. The twisted structure at the front and rear ends of the second fan blade enables smooth demoulding, and can effectively reduce the fluid loss of the wind wheel 300 and improve the working performance of the wind wheel 300 .

此外，轮毂320、底板330和第二风叶注塑一体成型，不仅可以保证风轮300的结构、性能稳定性，并且方便成型、制造简单，大大提高了风轮300的装配效率，保证风轮300的连接可靠性，再者，一体成型的结构的整体强度和稳定性较高，组装更方便，寿命更长。In addition, the hub 320, the bottom plate 330, and the second blade are integrally formed by injection molding, which not only ensures the structure and performance stability of the wind wheel 300, but also facilitates molding and simple manufacturing, greatly improves the assembly efficiency of the wind wheel 300, and ensures that the wind wheel 300 Furthermore, the overall strength and stability of the one-piece structure are higher, the assembly is more convenient, and the service life is longer.

可以理解的是，参照图2和图5，第一扩压器400的侧壁朝向风轮300的一端设置有弧面401，弧面401位于第一扩压器400的侧壁的外侧，且弧面401设置在第一风叶410与进气通道101之间，弧面401与容纳腔的侧壁限定出过渡通道104，气流从进气通道101 出来后，进入到过渡通道104后通过与弧面401接触，使气流顺畅地经过过渡通道104，降低气动噪音。It can be understood that, referring to FIG. 2 and FIG. 5 , the side wall of the first diffuser 400 is provided with an arc surface 401 at one end facing the wind wheel 300 , and the arc surface 401 is located outside the side wall of the first diffuser 400 , and The arc surface 401 is arranged between the first fan blade 410 and the air intake passage 101, and the arc surface 401 and the side wall of the housing chamber define the transition passage 104. After the air flow comes out of the air intake passage 101, it enters the transition passage 104 and passes through the The arc surface 401 is in contact, so that the air flow passes through the transition channel 104 smoothly, reducing the aerodynamic noise.

可以理解的是，参照图6，沿风道内气流的流动方向，第二风叶310的宽度逐渐减少。第二风叶310位于进气通道的进风端的宽度最大，使风轮300转动时，增大第二风叶310与空气的接触面积，使第二风叶310更容易将空气导入到进气通道中，当气体进入进气通道后，气体具备一定的动能，气体沿着第二风叶310运动，气体在进气通道中向着出风端流动，且气体的流动速度由进气通道的进气端往进气通道出气端逐渐加快，第二风叶310的宽度往进气通道的出气端逐渐减少，降低气流离开进气通道时的阻力，减少气流动能的损失，提高进气通道的效率。此外，第二风叶310的宽度沿气流的流动方向逐渐减少，使气流在进气通道流动时，减少气流与第二风叶310之间的摩擦与碰撞，降低气体流动时产生的气动噪音，提高用户体验。It can be understood that, referring to FIG. 6 , along the flow direction of the airflow in the air duct, the width of the second blade 310 gradually decreases. The width of the second fan blade 310 at the air inlet end of the air intake passage is the largest, so that when the wind wheel 300 rotates, the contact area between the second fan blade 310 and the air is increased, making it easier for the second fan blade 310 to introduce air into the intake air. In the channel, when the gas enters the air intake channel, the gas has a certain kinetic energy, and the gas moves along the second fan blade 310, and the gas flows in the air intake channel toward the air outlet end, and the flow speed of the gas is determined by the inlet channel of the air intake channel. The air end gradually speeds up toward the air outlet end of the air intake passage, and the width of the second fan blade 310 gradually decreases toward the air outlet end of the air intake passage, which reduces the resistance when the airflow leaves the air intake passage, reduces the loss of air kinetic energy, and improves the efficiency of the air intake passage . In addition, the width of the second fan blade 310 gradually decreases along the flow direction of the airflow, so that when the airflow flows in the air intake passage, the friction and collision between the airflow and the second fan blade 310 are reduced, and the aerodynamic noise generated when the gas flows is reduced. Improve user experience.

另外，第二风叶310的最大宽度与第二风叶310的最小宽度比例范围为1.3至2.1之间，例如第二风叶310的最大宽度与第二风叶310的最小宽度比例可以是1.3、1.5、1.8、2.0、2.1等，使在增大第二风叶310与空气的接触面积的同时，减少第二风叶310在进气通道内对气流排出进气通道的影响，同时降低气动噪音，提高进气通道的性能。In addition, the ratio of the maximum width of the second blade 310 to the minimum width of the second blade 310 ranges from 1.3 to 2.1, for example, the ratio of the maximum width of the second blade 310 to the minimum width of the second blade 310 may be 1.3 . Noise, improve the performance of the intake passage.

可以理解的是，参照图7和图8，第二风叶310与风罩200的内壁间隙配合，第二风叶310与风罩200的内壁的之间的距离为d，d满足：0.12≤d≤0.5mm，使在确保第二风叶310与风罩200的内壁之间的不会发生接触的同时，减少第二风叶310与风罩200内壁之间的间隙，降低从间隙流走的风量，提高风轮300的效率。It can be understood that, referring to FIG. 7 and FIG. 8 , the second fan blade 310 is in clearance fit with the inner wall of the windshield 200 , and the distance between the second fan blade 310 and the inner wall of the windshield 200 is d, and d satisfies: 0.12≤ d≤0.5mm, so that while ensuring that there will be no contact between the second fan blade 310 and the inner wall of the wind shield 200, the gap between the second fan blade 310 and the inner wall of the wind shield 200 is reduced, and the flow away from the gap is reduced. The air volume is increased, and the efficiency of the wind wheel 300 is improved.

可以理解的是，第一风叶410的数量z1，第二风叶310的数量z2，且z1＞z2，即第一风叶410的数量多于第二风叶310的数量，风轮300转动时，将空气分成多股气流送到第一扩压通道102，当第一风叶410的数量多于第二风叶310的数量时，进入到第一扩压通道102的多股气流再进一步分成更多份气流，有利于降低气流的脉动，降低噪音。It can be understood that, the number z1 of the first blades 410, the number z2 of the second blades 310, and z1>z2, that is, the number of the first blades 410 is more than the number of the second blades 310, the wind wheel 300 rotates , the air is divided into multiple airflows and sent to the first diffuser channel 102. When the number of the first fan blades 410 is greater than the number of the second fan blades 310, the multiple airflows entering the first diffuser channel 102 are further Dividing into more airflows is beneficial to reduce the pulsation of the airflow and reduce the noise.

可以理解的是，参照图1，机壳组件还设置有第二扩压器500，第二扩压器500包括有第三风叶410、内筒体530和外筒体520，内筒体530与第一扩压器400对接，内筒体530与安装毂420之间利用过盈配合，实现两者之间的初步定位，然后再通过螺钉灯紧固件将安装毂420和内筒体530固定连接，实现第一扩压器400与第二扩压器500的组装。外筒体520靠近风机进气口的一端沿轴向延伸形成有第一抵接部521，第一抵接部521为外筒体520侧壁内侧的延伸，沿外筒体520的轴向，第一抵接部521的轴向长度比外筒体520的侧壁主体的轴向长度小，即第一抵接部521的厚度小于外筒体520侧壁主体的厚度，使在外筒体520的外侧形成有第一定位阶梯522，风罩200大致呈圆台状，通过将第一抵接部521伸进风罩200内，并使第一抵接部521与风罩200内壁过盈配合，风罩200与外筒体520之间方便拆卸和方便安装，此外，第一抵接部521伸入到风罩200内部时，直到风罩200的侧壁与第一定位阶梯522抵接，此时，完成风罩200在外筒体520上的定位，方便快捷。It can be understood that, referring to FIG. 1 , the casing assembly is further provided with a second diffuser 500, and the second diffuser 500 includes a third vane 410, an inner cylinder 530 and an outer cylinder 520, and the inner cylinder 530 Docking with the first diffuser 400, use interference fit between the inner cylinder 530 and the installation hub 420 to achieve preliminary positioning between the two, and then install the hub 420 and the inner cylinder 530 through screw light fasteners The fixed connection realizes the assembly of the first diffuser 400 and the second diffuser 500 . One end of the outer cylinder 520 close to the air inlet of the fan extends axially to form a first abutting portion 521 , the first abutting portion 521 is an extension of the inner side of the side wall of the outer cylinder 520 , along the axial direction of the outer cylinder 520 , The axial length of the first abutting portion 521 is smaller than the axial length of the side wall body of the outer cylinder 520, that is, the thickness of the first abutting portion 521 is smaller than the thickness of the side wall body of the outer cylinder 520, so that the outer cylinder 520 A first positioning step 522 is formed on the outer side of the windshield 200, and the windshield 200 is roughly in the shape of a circular platform. By extending the first abutting part 521 into the windshield 200 and making the first abutting part 521 interfere with the inner wall of the windshield 200, It is easy to disassemble and install between the windshield 200 and the outer cylinder 520. In addition, when the first abutting part 521 extends into the inside of the windshield 200, until the side wall of the windshield 200 abuts against the first positioning step 522, then At this time, the positioning of the windshield 200 on the outer cylinder 520 is completed, which is convenient and quick.

此外，参照图1和图9，第三风叶510、内筒体530和外筒体520之间限定出第二扩压通道103，进气通道、第一扩压通道102和第二扩压通道103依次对接，内筒体530的外侧设置有多个第三风叶510，第一风叶与第三风叶和风轮300形成至少两级扩压结构，能够对气流进行增压，同时还能降低风机整体声功率和叶频率峰值，以降低风机的噪声，促进风机朝小型化、高功率方向发展。In addition, referring to Fig. 1 and Fig. 9, the second diffuser passage 103 is defined between the third fan blade 510, the inner cylinder 530 and the outer cylinder 520, and the intake passage, the first diffuser passage 102 and the second diffuser The channels 103 are connected sequentially, and the outer side of the inner cylinder 530 is provided with a plurality of third fan blades 510. The first fan blades, the third fan blades and the wind wheel 300 form at least a two-stage diffuser structure, which can pressurize the air flow and simultaneously It can reduce the overall sound power of the fan and the peak value of the blade frequency to reduce the noise of the fan and promote the development of the fan in the direction of miniaturization and high power.

可以理解的是，参照图1和图9，第三风叶的两端分别与内筒体530的外壁以及外筒体520的内壁相连接。第三风叶510能够为内筒体530以及安装毂420提供支撑，从而简化了电风机的安装结构，提高了电风机的集成度，有利于实现电风机的小型化。It can be understood that, referring to FIG. 1 and FIG. 9 , both ends of the third blade are respectively connected to the outer wall of the inner cylinder 530 and the inner wall of the outer cylinder 520 . The third fan blade 510 can provide support for the inner barrel 530 and the installation hub 420, thereby simplifying the installation structure of the electric fan, improving the integration of the electric fan, and facilitating the miniaturization of the electric fan.

还可以理解的是，参照图9，多个第三风叶510沿内筒体530的周向均匀分布，使第二扩压器500整体美观，同时有利于气流在第二扩压通道103内均匀的流动，提高第二扩压器500的效率。It can also be understood that, referring to FIG. 9 , a plurality of third vanes 510 are evenly distributed along the circumference of the inner cylinder 530 , making the second diffuser 500 overall beautiful, and at the same time facilitating the flow of air in the second diffuser passage 103 . Uniform flow increases the efficiency of the second diffuser 500 .

此外，参照图1，沿第二扩压器的轴向，第三风叶510的尾端与内筒体530的尾端的轴向距离为H1，第三风叶510的尾端与外筒体520的尾端的轴向距离为H2，且H2＞H1，使气流从第三风叶510的后缘流出后，不会直接扩散到外界，同时在第二扩压通道103的尾端形成一个过渡段，过渡段承接从第二扩压通道103的出气端流出的气流，并引导到第二扩压器500侧壁外侧的大气中，使起到减速扩压的作用，另外，过渡段加长了第二扩压通道103的出气端气体流动的扩散行程，减小了第二扩压通道103出气端气流的扩压损失，从而降低此处的气动噪音。In addition, referring to FIG. 1 , along the axial direction of the second diffuser, the axial distance between the tail end of the third fan blade 510 and the tail end of the inner cylinder 530 is H1, and the tail end of the third fan blade 510 and the outer cylinder body The axial distance of the tail end of 520 is H2, and H2>H1, so that after the air flow flows out from the rear edge of the third blade 510, it will not directly diffuse to the outside, and at the same time, a transition is formed at the tail end of the second diffuser channel 103 Section, the transition section accepts the airflow flowing out from the outlet end of the second diffuser channel 103, and guides it into the atmosphere outside the side wall of the second diffuser 500, so as to play the role of deceleration and diffusion. In addition, the transition section is lengthened The diffusion stroke of the gas flow at the gas outlet end of the second diffuser channel 103 reduces the diffusion loss of the gas flow at the gas outlet end of the second diffuser channel 103 , thereby reducing the aerodynamic noise here.

可以理解的是，第一风叶的数量z1，第三风叶的数量z3，且z3＞z1，即第三风叶510的数量多于第一风叶410的数量。第三风叶510的数量多于第一风叶410的数量时，能够将从第一扩压通道102的出口端流出的气流分成多股，有利于降低气流脉动，降低噪音，同时能够对第二扩压通道103内的气流进一步减速扩压。It can be understood that the number z1 of the first blades and the number z3 of the third blades, and z3>z1, that is, the number of the third blades 510 is greater than the number of the first blades 410 . When the number of the third fan blades 510 is greater than the number of the first fan blades 410, the air flow flowing out from the outlet end of the first diffuser channel 102 can be divided into multiple streams, which is beneficial to reduce air flow pulsation and noise, and at the same time can The airflow in the second diffuser channel 103 is further decelerated and diffused.

可以理解的是，参照图3，沿第一扩压器400的轴向，进气通道的轴向长度为h1，第一扩压通道102的轴向长度为h2，第二扩压通道103的轴向长度为h3，满足：h1≥h2≥h3，风机的轴向结构更加紧凑，同时提高风机的输出效率，提高气体的流动效率。It can be understood that, referring to FIG. 3 , along the axial direction of the first diffuser 400, the axial length of the intake passage is h1, the axial length of the first diffuser passage 102 is h2, and the axial length of the second diffuser passage 103 is The axial length is h3, satisfying: h1≥h2≥h3, the axial structure of the fan is more compact, and at the same time, the output efficiency of the fan is improved, and the gas flow efficiency is improved.

可以理解的是，第二扩压器500沿轴向凸出设置有多个凸台540，多个凸台540配合定位PCB板。通过将螺钉穿过PCB板上的定位孔，与凸台540螺纹连接，使固定地将PCB 板安装到机壳组件中。It can be understood that, the second diffuser 500 protrudes along the axial direction and is provided with a plurality of bosses 540 , and the plurality of bosses 540 cooperate to position the PCB board. By passing the screw through the positioning hole on the PCB and threading it with the boss 540, the PCB is fixedly installed in the casing assembly.

本公开的第二方面实施例的清洁设备，包括有根据本公开第一方面实施例的风机。风轮300转动时，空气沿着进入到进气通道中，气流从进气通道101过渡到第一扩压通道102时，经过第一风叶410后，气流更加平滑顺畅地地进入到第一扩压通道102，减少气流的扩散和冲击损失，降低气动噪音。The cleaning equipment according to the embodiment of the second aspect of the present disclosure includes the fan according to the embodiment of the first aspect of the present disclosure. When the wind wheel 300 rotates, the air enters into the intake passage along the direction, and when the airflow transitions from the intake passage 101 to the first diffuser passage 102, after passing through the first fan blade 410, the airflow enters the first diffuser passage more smoothly. The diffuser channel 102 reduces the diffusion and impact loss of the airflow, and reduces the aerodynamic noise.

可以理解的是，清洁设备可以是手持吸尘器、桶式吸尘器或扫地机器人，也可以为其他清洁设备。当清洁设备为手持吸尘器时，手持吸尘器要求电风机的体积小且功率较大，以满足清洁需求，在电机保持高功率的同时，能够有效地降低噪音，降低清洁设备产生的噪音对用于造成的困扰，提升了用户体验。It can be understood that the cleaning equipment may be a hand-held vacuum cleaner, a bucket vacuum cleaner, or a sweeping robot, or other cleaning equipment. When the cleaning equipment is a hand-held vacuum cleaner, the hand-held vacuum cleaner requires the electric fan to be small in size and high in power to meet the cleaning needs. While the motor maintains high power, it can effectively reduce noise and reduce the noise generated by the cleaning equipment. Trouble, improve user experience.

上面结合附图对本公开实施例作了详细说明，但是本公开不限于上述实施例，在所属技术领域普通技术人员所具备的知识范围内，还可以在不脱离本公开宗旨的前提下作出各种变化。The embodiments of the present disclosure have been described in detail above in conjunction with the accompanying drawings, but the present disclosure is not limited to the above embodiments, and various modifications can be made without departing from the purpose of the present disclosure within the scope of knowledge of those skilled in the art. Variety.

Claims

风机，包括：Fans, including:

机壳组件；Chassis components;

风罩，安装在所述机壳组件，所述风罩与所述机壳组件配合形成容纳腔；a windshield installed on the casing assembly, and the windshield cooperates with the casing assembly to form an accommodation chamber;

风轮，设置在所述容纳腔内，所述风轮与所述容纳腔的侧壁配合限定出进气通道；以及a wind wheel, arranged in the accommodation cavity, the wind wheel cooperates with the side wall of the accommodation cavity to define an air intake channel; and

第一扩压器，设置在所述容纳腔内，包括有第一风叶和安装毂，其中，所述安装毂、所述第一风叶以及所述容纳腔的侧壁配合限定出第一扩压通道，所述进气通道与所述第一扩压通道依次连通，所述安装毂的外沿设置有多个第一风叶，沿气流方向，第一风叶具有前缘，第一风叶的前缘与安装毂连接的一端为第一端，第一风叶的前缘远离安装毂的一端为第二端，沿所述安装毂的轴向，所述第二端比所述第一端更靠近所述进气通道。The first diffuser is arranged in the accommodating cavity and includes a first fan blade and a mounting hub, wherein the mounting hub, the first fan blade and the side wall of the accommodating cavity cooperate to define a first A diffuser channel, the air intake channel communicates with the first diffuser channel in turn, a plurality of first fan blades are arranged on the outer edge of the installation hub, along the direction of air flow, the first fan blades have a leading edge, and the first fan blades have a leading edge. The end where the front edge of the fan blade is connected to the installation hub is the first end, the end of the front edge of the first fan blade that is away from the installation hub is the second end, and along the axial direction of the installation hub, the second end is larger than the The first end is closer to the intake passage.
根据权利要求1所述的风机，其中，限定所述第一端与所述第二端之间的连线为第一连线，所述第一连线与所述安装毂的径向线之间的夹角a，所述a满足：25°≤a≤70°。The fan according to claim 1, wherein the line defining the connection between the first end and the second end is a first line, and the line between the first line and the radial line of the mounting hub is The angle a between them satisfies: 25°≤a≤70°.
根据权利要求1所述的风机，其中，所述风轮包括有第二风叶，沿所述风轮的轴向，所述第二风叶的宽度逐渐减少。The wind turbine according to claim 1, wherein the wind wheel includes second wind blades, and the width of the second wind blades decreases gradually along the axial direction of the wind wheel.
根据权利要求3所述的风机，其中，所述第二风叶的最大宽度与所述第二风叶的最小宽度的比值为x，满足：1.3≤x≤2.1。The fan according to claim 3, wherein the ratio of the maximum width of the second blade to the minimum width of the second blade is x, which satisfies: 1.3≤x≤2.1.
根据权利要求3所述的风机，其中，所述第二风叶与所述风罩的内壁间隙配合，所述第二风叶与所述风罩的内壁之间的距离为d，所述d满足：0.12≤d≤0.5mm。The blower fan according to claim 3, wherein the second fan vane is in clearance fit with the inner wall of the wind cover, and the distance between the second fan blade and the inner wall of the fan cover is d, and the d Satisfy: 0.12≤d≤0.5mm.
根据权利要求3所述的风机，其中，所述第二风叶的数量为z2，所述第一风叶的数量为z1，满足：z2＜z1，且7≤z2≤9。The fan according to claim 3, wherein the number of the second blades is z2, and the number of the first blades is z1, satisfying: z2<z1, and 7≤z2≤9.
根据权利要求1所述的风机，其中，所述机壳组件还设置有第二扩压器，所述第二扩压器包括有内筒体、外筒体和第三风叶，所述内筒体与所述安装毂对接，所述第三风叶沿周向分布在所述内筒体的外周，所述内筒体、所述外筒体和所述第三风叶之间限定出第二扩压通道，所述进气通道、所述第一扩压通道和所述第二扩压通道依次连通。The blower according to claim 1, wherein the casing assembly is further provided with a second diffuser, the second diffuser includes an inner cylinder, an outer cylinder and a third vane, the inner The cylinder body is docked with the installation hub, the third fan blades are distributed on the outer periphery of the inner cylinder body along the circumferential direction, and a boundary is defined between the inner cylinder body, the outer cylinder body and the third fan blades. The second diffuser channel, the intake channel, the first diffuser channel and the second diffuser channel communicate in sequence.
根据权利要求7所述的风机，其中，沿所述第二扩压器的轴向，所述第三风叶的尾端与所述内筒体的尾端的距离为H1，所述第三风叶的尾端与所述外筒体的尾端的距离为H2，满足：H2＞H1。The fan according to claim 7, wherein, along the axial direction of the second diffuser, the distance between the tail end of the third blade and the tail end of the inner cylinder is H1, and the third wind blade The distance between the tail end of the leaf and the tail end of the outer cylinder is H2, which satisfies: H2>H1.
根据权利要求7所述的风机，其中，所述第三风叶的数量为z3，所述第一风叶的数量为z1，满足z3＞z1。The fan according to claim 7, wherein the number of the third blades is z3, the number of the first blades is z1, and z3>z1 is satisfied.
根据权利要求7所述的风机，其中，沿所述第一扩压器的轴向，所述进气通道的轴向长度为h1，所述第一扩压通道的轴向长度为h2，所述第二扩压通道的轴向长度为h3，满足：h1≥h2≥h3。The fan according to claim 7, wherein, along the axial direction of the first diffuser, the axial length of the inlet passage is h1, and the axial length of the first diffuser passage is h2, so The axial length of the second diffuser channel is h3, which satisfies: h1≥h2≥h3.
清洁设备，包括有权利要求1至10任一项所述的风机。A cleaning device comprising the blower according to any one of claims 1 to 10.