WO2023109287A1 - 离心风机和电器设备 - Google Patents

离心风机和电器设备 Download PDF

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Publication number
WO2023109287A1
WO2023109287A1 PCT/CN2022/125202 CN2022125202W WO2023109287A1 WO 2023109287 A1 WO2023109287 A1 WO 2023109287A1 CN 2022125202 W CN2022125202 W CN 2022125202W WO 2023109287 A1 WO2023109287 A1 WO 2023109287A1
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WO
WIPO (PCT)
Prior art keywords
air outlet
wind wheel
centrifugal fan
vortex
cover plate
Prior art date
Application number
PCT/CN2022/125202
Other languages
English (en)
French (fr)
Inventor
吴金鑫
Original Assignee
广东美的白色家电技术创新中心有限公司
美的集团股份有限公司
美的集团(上海)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 广东美的白色家电技术创新中心有限公司, 美的集团股份有限公司, 美的集团(上海)有限公司 filed Critical 广东美的白色家电技术创新中心有限公司
Publication of WO2023109287A1 publication Critical patent/WO2023109287A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4226—Fan casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F04D17/16—Centrifugal pumps for displacing without appreciable compression
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence

Definitions

  • the present application relates to the technical field of fans, in particular to a centrifugal fan and electrical equipment.
  • Centrifugal fan is a kind of fluid machine, which relies on the input mechanical energy to increase the gas pressure and discharge the gas.
  • the centrifugal fan includes a volute, a volute tongue and a wind wheel.
  • the function of the volute tongue is to prevent the airflow generated by the wind wheel from flowing back to the inside of the volute, thereby guiding the airflow generated by the wind wheel to the air outlet cavity of the volute, and diverting the airflow from the volute to the inside of the volute.
  • the air outlet of the shell is exhausted.
  • the air flow generates vortex at the air outlet, and the vortex repeatedly oscillates and hits the side wall of the volute, thereby generating relatively loud noise.
  • the main purpose of this application is to propose a centrifugal fan, aiming at solving the technical problem of high noise of the existing centrifugal fan.
  • the centrifugal fan proposed by this application includes:
  • the volute tongue, the volute tongue and the volute form a wind wheel chamber and an air outlet chamber, the wind wheel chamber is used for the installation of the wind wheel, the air outlet chamber communicates with the wind wheel chamber and There is an air outlet;
  • the volute tongue includes a wind wheel side wall facing the wind wheel and an air outlet side wall facing the air outlet cavity, and the air outlet side wall includes an air outlet connected to the wind wheel side wall A side arc surface, a step surface extending from the air outlet side arc surface toward a side away from the air outlet chamber, and a flow guiding surface extending from the step surface toward the edge of the air outlet.
  • the step surface is parallel to the plane where the air outlet is located.
  • the width of the projection of the step surface on the plane where the air outlet is located is 10-40mm.
  • the distance between the step surface and the side wall surface of the wind wheel is 10-50mm.
  • the volute includes a first cover plate, a second cover plate, and a scroll side plate disposed between the first cover plate and the second cover plate, and the volute tongue is disposed on
  • the first cover plate and the second cover plate are connected to the scroll side plate
  • the scroll side plate includes an air outlet portion, and the air outlet portion is connected to the scroll tongue
  • the first A cover plate and the second cover plate form the air outlet cavity
  • the distance between the guide surface and the air outlet part is greater than the distance between the air outlet side arc surface and the air outlet part distance.
  • a broken vortex is provided on the arc surface of the wind outlet side, and the broken vortex is used to break the vortex.
  • the broken vortex element includes a first broken vortex part and a second broken vortex part, the first broken vortex part is close to one end of the wind wheel cavity and the second broken vortex part is close to the One end of the wind wheel cavity is connected, the angle between the first broken vortex part and the second broken vortex part is less than or equal to 60°, and the distance between the first broken vortex part and the second broken vortex part The wind wheel cavity gradually increases in the direction toward the air outlet.
  • the surface of the vortex crushing element away from the arc surface of the air outlet side is set at an angle with the arc surface of the air outlet side, and the surface of the vortex crushing element far away from the arc surface of the air outlet side and the arc surface of the air outlet side are arranged at an angle.
  • the included angle of the arc surface on the air outlet side is less than or equal to 30°.
  • a baffle is provided on the side wall of the wind wheel, and the baffle is used to reduce the backflow of the airflow at the volute tongue.
  • the present application also proposes an electrical device, which includes a casing and a centrifugal fan, the centrifugal fan is arranged in the casing, the centrifugal fan includes a volute and a volute; the volute and the volute Enclosed to form a wind wheel chamber and an air outlet chamber, the wind wheel chamber is used for installation of the wind wheel, the wind outlet chamber communicates with the wind wheel chamber and has an air outlet; the worm tongue includes a The wind rotor side wall surface and the wind outlet side wall surface facing the air outlet cavity, the wind outlet side wall surface includes the wind outlet side arc surface connected with the wind rotor side wall surface, and is facing away from the wind outlet side arc surface A step surface extending from one side of the air outlet cavity, and a guide surface extending from the step surface toward the edge of the air outlet.
  • the electrical equipment is a bladeless fan.
  • the centrifugal fan of the present application includes a volute and a volute tongue; the volute tongue and the volute are enclosed to form a wind wheel cavity and an air outlet cavity, and the wind wheel cavity is used for installation of the wind wheel, and the air outlet cavity and the air outlet cavity
  • the wind wheel cavity is connected and has an air outlet;
  • the volute tongue includes a wind wheel side wall facing the wind wheel and an air outlet side wall facing the air outlet cavity, and the wind outlet side wall includes the wind wheel side wall facing the wind wheel.
  • the air outlet arc surface connected to the wheel side wall, the step surface extending from the air outlet arc surface toward the side away from the air outlet chamber, and the guide extending from the step surface toward the edge of the air outlet. flow noodles.
  • Fig. 1 is the structural representation of an embodiment of the centrifugal fan of the present application
  • Fig. 2 is a structural sectional view of Fig. 1;
  • Fig. 3 is the enlarged view of place A in Fig. 2;
  • Fig. 4 is a top view of the centrifugal fan in Fig. 2;
  • Fig. 5 is the enlarged view of place B in Fig. 4;
  • FIG. 6 is a detailed view of the volute tongue of the centrifugal fan of the present application.
  • Fig. 7 is a schematic structural diagram of an embodiment of the bladeless fan of the present application.
  • FIG. 8 is a side view of FIG. 7 .
  • This application proposes a centrifugal fan.
  • the centrifugal fan 100 includes a volute 110 and a volute tongue 120; cavity 140, the wind wheel cavity 130 is used for installing the wind wheel 160, the wind outlet cavity 140 communicates with the wind wheel cavity 130 and has an air outlet 150;
  • the volute tongue 120 includes a Wind wheel side wall surface 121 and the air outlet side wall surface 122 facing the air outlet chamber 140, the air outlet side wall surface 122 includes an air outlet side arc surface 122 connected with the wind wheel side wall surface 121, from the air outlet side wall surface 122
  • the side arc surface 123 has a stepped surface 124 extending toward a side away from the air outlet chamber 140 , and a flow guiding surface 125 extending from the stepped surface 124 toward an edge of the air outlet 150 .
  • the volute 110 is provided with an air inlet communicating with the wind wheel chamber 130 , and air flows into the wind wheel chamber 130 from the air inlet.
  • the number of the air inlet can be one, and the air inlet is opened on one side of the volute 110; the number of the air inlet can be two, and the two air inlets are opened on two opposite sides of the volute 110 side.
  • the wind wheel 160 is installed in the wind wheel chamber 130, and the wind wheel 160 rotates under the drive of the driving device, thereby generating a negative pressure in the wind wheel chamber 130, and the air flow enters the wind wheel chamber 130 from the air inlet, and then the wind Under the action of the wheel 160 , the airflow is further accelerated, and the accelerated airflow flows into the air outlet cavity 140 under the action of the volute tongue 120 , and then is discharged from the air outlet 150 .
  • a collector is installed at the air inlet, so that the air flow is evenly introduced into the wind wheel cavity 130 , thereby reducing the loss of air flow.
  • the volute 110 includes a first cover plate 111, a second cover plate 112 and a scroll side plate 113 arranged between the first cover plate 111 and the second cover plate 112, and the volute tongue 120 is provided Between the first cover plate 111 and the second cover plate 112 and connected with the scroll side plate 113 .
  • the volute tongue 120 is used to split the airflow, prevent the circulation of the airflow in the wind wheel cavity 130 , and guide the airflow to the air outlet 150 .
  • the volute tongue 120 includes a wind wheel side wall surface 121 , an air outlet side arc surface 122 , a step surface 124 and a flow guide surface 125 .
  • the side wall surface 121 of the wind wheel is smoothly transitioned to the arc surface 122 of the air outlet side, and the side wall surface 121 of the wind wheel is connected to the side plate 113 of the scroll.
  • the wind wheel side wall surface 121 extends from the wind outlet side arc surface 122 in a direction away from the air outlet chamber 140, and the distance between the wind wheel side wall surface 121 and the wind wheel 160 is at a distance from the air outlet side wall surface 122.
  • the direction of the wind cavity 140 increases gradually, so that the airflow in the wind wheel cavity 130 can flow more smoothly, thereby increasing the air volume.
  • the air outlet side arc surface 122 is recessed in a direction away from the air outlet cavity 140 , thereby forming a concave arc surface. It can be understood that, in the existing centrifugal fan 100, when the airflow is discharged in the air outlet cavity 140, due to the viscosity of the airflow, the first cover plate 111 and the second cover plate 112 will generate resistance to the airflow, and the airflow will be affected by the first The impact of the boundary layer at the cover plate 111 and the second cover plate 112 makes the air velocity near the first cover plate 111 and the second cover plate 112 smaller, and the air velocity near the middle of the air outlet chamber 140 is larger; The airflow in the wind chamber 140 has a speed difference in the direction from the first cover plate 111 to the second cover plate 112 , thereby generating a pressure difference, and there is a pressure gradient between the first cover plate 111 and the second cover plate 112 .
  • the airflow Under the action of this pressure gradient, the airflow will form a local vortex near the first cover plate 111 and the second cover plate 112 , and the vortex will block the flow channel of the air outlet cavity 140 , resulting in poor air outlet and noise.
  • the arc surface 122 on the air outlet side is set as an arc surface that is concave inward away from the direction of the air outlet chamber 140, so that the air outlet area in the middle of the air outlet chamber 140 can be increased, so that the middle part of the air outlet chamber 140
  • the velocity of the airflow is reduced, thereby reducing the velocity difference of the airflow between the first cover plate 111 and the second cover plate 112 , weakening the pressure difference of the airflow, and reducing the pressure gradient of the airflow.
  • the generation of eddy current can be suppressed to a certain extent, the blockage of the flow channel of the air outlet chamber 140 can be reduced, the fluency of the air outlet can be increased, and the generation of noise can be reduced.
  • setting the arc surface 122 on the air outlet side to be recessed can also make the airflow accelerated by the wind wheel 160 produce a certain time difference when it hits the volute tongue 120, so that the airflow produces a phase difference, thereby weakening the difference between different frequencies.
  • the coupling of noise is strengthened to further play the function of noise reduction.
  • the concave shape of the arc surface 122 on the air outlet side should correspond to the pressure gradient of the airflow in the air outlet cavity 140, so that the velocity of the airflow in the air outlet cavity 140 is relatively uniform, so that the arc surface 122 on the air outlet side can be more Better weaken the pressure gradient of the airflow and better avoid the generation of vortex.
  • the wind wheel 160 disposed in the wind wheel cavity 130 has a front disk, a middle disk and a rear disk, and the airflow accelerated by the wind wheel 160 is in the impeller If the position velocity of the disk is relatively high, the point on the air outlet side arc surface 122 farthest from the air outlet chamber 140 is aligned with the middle disk of the wind wheel 160, thereby better reducing the airflow pressure gradient.
  • the stepped surface 124 expands outwards, and forms a space for accommodating eddy currents by surrounding the guide surface 125 and the first cover plate 111 and the second cover plate 112 of the volute 110 .
  • the setting of the guide surface 125 makes the vortex at the air outlet 150 transferred to the corner point where the step surface 124 and the guide surface 125 meet, so that the position of the vortex is far away from the outlet formed by the arc surface 122 on the outlet side and the volute 110.
  • the air duct further reduces the eddy current at the air outlet 150 from blocking the air outlet chamber 140, avoids the vibration of the eddy current, and reduces noise.
  • the setting of the guide surface 125 also makes the air outlet 150 larger, so that the air output of the centrifugal fan 100 can be increased.
  • the centrifugal fan 100 of the present application includes a volute 110 and a volute tongue 120; the volute tongue 120 and the volute 110 are enclosed to form a wind wheel cavity 130 and an air outlet cavity 140, and the wind wheel cavity 130 is used for the wind wheel 160, the air outlet chamber 140 communicates with the wind wheel chamber 130 and has an air outlet 150;
  • the air outlet side wall surface 122, the air outlet side wall surface 122 includes the air outlet side arc surface 122 connected with the wind wheel side wall surface 121, the air outlet side arc surface 123 facing away from the air outlet chamber 140 A step surface 124 extending from one side, and a guide surface 125 extending from the step surface 124 toward the edge of the air outlet 150 .
  • the stepped surface 124 is parallel to the plane where the air outlet 150 is located. Wherein, the step surface 124 is parallel to the plane where the air outlet 150 is located. On the one hand, it can facilitate the production and manufacture of the centrifugal fan; The airflow will affect the air outlet, thereby reducing the noise and increasing the air volume.
  • the width of the projection of the step surface 124 on the plane where the air outlet 150 is located is 10-40 mm. Please refer to FIG. 2 , wherein the width is the projection of the distance between the air outlet side arc surface 122 and the air guide surface 125 on the plane where the air outlet 150 is located, that is, L in the figure. If the width is less than 10 mm, the position of the eddy current cannot be completely shifted, and the air outlet cavity 140 will still be blocked, resulting in vibrations to a certain extent, resulting in noise.
  • the step surface 124 is extended too wide, which will cause the area of the air outlet 150 to be too large, which will cause energy loss to the airflow generated by the centrifugal fan 100 and affect the air outlet effect of the centrifugal fan 100 .
  • the distance between the step surface 124 and the side wall surface 121 of the wind rotor is 10-50 mm.
  • the distance between the step surface 124 and the side wall surface 121 of the wind rotor refers to the distance from the highest point of the side wall surface 121 of the wind rotor to the horizontal plane where the step surface 124 is located, that is, H in FIG. 2 . If the distance is greater than 50mm, the air outlet duct of the air outlet cavity 140 will be too long, and the eddy current generated at the air outlet 150 will not be easily transferred to the step surface 124, and the eddy current will still generate noise.
  • the curved surface 122 on the air outlet side cannot effectively weaken the pressure gradient of the airflow, and the curved surface 122 on the air outlet side cannot sufficiently guide the airflow, and turbulence is likely to occur, resulting in a Not smooth.
  • the volute 110 includes a first cover plate 111 , a second cover plate 112 and a scroll side plate 113 disposed between the first cover plate 111 and the second cover plate 112 ,
  • the volute tongue 120 is arranged between the first cover plate 111 and the second cover plate 112 and is connected with the scroll side plate 113
  • the scroll side plate 113 includes the outlet chamber 140
  • the distance between the guide surface 125 and the air outlet portion 114 is greater than the distance between the air outlet side arc surface 122 and the air outlet portion 114 .
  • the first cover plate 111 , the second cover plate 112 and the scroll side plate 113 jointly enclose a volute case 110 .
  • the scroll side plate 113 includes an air outlet part 114 and a scroll part 115, and the air outlet part 114 is surrounded by the scroll tongue 120, the first cover plate 111 and the second cover plate 112.
  • the air outlet cavity 140 , the scroll portion 115 , the volute tongue 120 , the first cover plate 111 and the second cover plate 112 enclose the wind wheel cavity 130 .
  • the airflow accelerated by the wind wheel 160 flows from the air outlet channel between the air outlet side arc surface 122 and the air outlet part 114 to the air outlet cavity 140, and then is discharged from the air outlet 150.
  • the distance between the wind parts 114 is greater than the distance between the air outlet side arc surface 122 and the air outlet part 114, so as to prevent the air flow from passing through the corner of the step surface 124 and the flow guide surface 125 when the air flows out, thereby The influence of the eddy current on the air outlet airflow is avoided, the blockage of the air outlet chamber 140 is avoided, the generation of turbulent flow is reduced, and the noise is reduced.
  • the curved surface 122 on the wind outlet side is provided with a vortex fragment 123a, and the vortex fragment 123a is used to crush the vortex.
  • the number of vortex fragments 123a arranged on the side arc surface of the air outlet wall may be one or more, if the number of vortex fragments 123a is multiple, Then, a plurality of said vortex breakers 123 a are arranged at intervals along the direction from the first cover plate 111 to the second cover plate 112 .
  • the vortex near the air outlet side arc surface 122 of the air outlet chamber 140 can be cut and broken from a larger vortex to a smaller vortex, thereby reducing the influence of the vortex on the air outlet and increasing the air outlet. Fluency, to avoid the noise.
  • the broken vortex part 123a includes a first broken vortex part and a second broken vortex part, the first broken vortex part is close to the end of the wind wheel cavity 130 and the second broken vortex part is close to One end of the wind wheel cavity 130 is connected, the angle between the first broken vortex part and the second broken vortex part is less than or equal to 60°, and the angle between the first broken vortex part and the second broken vortex part The distance between the wind wheels 160 gradually increases toward the air outlet 150 .
  • the vortex breaking part 123a is arranged in a triangle shape, and the first vortex breaking part and the second vortex breaking part are arranged in a strip shape.
  • the distance between the first vortex breaking part and the second vortex breaking part gradually increases in the direction close to the air outlet 150, so that the vortex breaking part 123a can better break the vortex.
  • the broken vortex part and the second broken vortex part play a guiding role for the broken vortex, so that the vortex can be blown out along the arc surface 122 of the air outlet side, so as to prevent the broken vortex from moving to different positions and avoid the influence of the vortex on the airflow.
  • the broken vortex part 123a will have a greater hindrance to the airflow, which will instead lead to the generation of a vortex, which will lead to poor airflow. Smooth, unfavorable and noise reduction.
  • the surface of the vortex crushing element 123a away from the arc surface 122 on the air outlet side is set at an angle with the arc surface 122 on the air outlet side, and the vortex crushing element 123a is far away from the arc surface on the air outlet side.
  • the angle between the surface of the surface 122 and the arc surface 122 on the air outlet side is less than or equal to 30°.
  • the included angle between the surface of the arc surface 122 on the air outlet side and the arc surface 122 on the air outlet side is set to increase the effect of the vortex breaking element 123a on breaking the vortex.
  • the angle between the surface of the vortex breaking member 123 a away from the arc surface 122 on the air outlet side and the arc surface 122 on the air outlet side is ⁇ in the figure.
  • the broken scroll member 123a is protrudingly arranged on the arc surface 122 of the air outlet side.
  • the included angle is greater than 30°, the height of the broken scroll member 123a protruding from the end close to the air outlet 150 will be too high, which will make the broken scroll member 123a The impact on the airflow in the air outlet cavity 140 will lead to the generation of noise.
  • the side wall surface 121 of the wind wheel is provided with a baffle 121a, and the baffle 121a is used to reduce the backflow of the airflow at the volute tongue 120, thereby increasing the flow of the airflow into and out of the air cavity 140
  • the flow rate can increase the air volume.
  • the baffle 121a may be V-shaped, and the baffle 121a includes a first baffle and a second baffle, and the distance between the first baffle and the second baffle is gradually increases in the direction away from the air outlet cavity 140 .
  • the baffle 121a may also be in the form of a wedge, which is not specifically limited here.
  • the surface of the baffle member 121a near the wind rotor 160 and the side wall surface 121 of the wind rotor are arranged at an included angle, and the included angle is less than or equal to 30°.
  • the angle between the surface of the baffle 121a and the side wall surface 121 of the wind wheel is set so that the baffle 121a can play a certain role in blocking the airflow on the one hand, and on the other hand, it can prevent the baffle 121a from completely blocking the backflow of the airflow. Blocking the backflow of the airflow will lead to excessive negative pressure between the wind wheel side and the wind wheel 160 , resulting in noise.
  • the baffle 121a is protruded on the side wall 121 of the wind wheel, and the distance between the highest point of the baffle 121a and the wind wheel 160 should be greater than the arc of the wind outlet side. The distance from the surface 122 to the wind wheel 160. In this way, the baffle 121a can avoid excessive blocking effect on the airflow, and ensure that in the direction of rotation of the wind wheel 160, the distance between the wind wheel 160, the scroll side plate 113 and the volute tongue 120 is gradually increased, avoiding the A sudden change in the distance causes a sudden change in the airflow inside the wind wheel cavity 130 , resulting in the generation of eddy currents, thereby avoiding the generation of noise.
  • the present application also proposes an electrical device, which includes a housing 210 and a centrifugal fan 100.
  • an electrical device which includes a housing 210 and a centrifugal fan 100.
  • the centrifugal fan 100 For the specific structure of the centrifugal fan 100, refer to the above-mentioned embodiments. Since this electrical device adopts all the technical solutions of all the above-mentioned embodiments, at least All the beneficial effects brought by the technical solutions of the above embodiments will not be repeated here.
  • the electrical equipment is a bladeless fan 200 .
  • the bladeless fan 200 generally includes a housing 210, the centrifugal fan 100 is arranged in the housing 210, and the housing 210 is provided with an air inlet channel, and the air flow enters the housing 210 from the air inlet channel, and then enters the Into the centrifugal fan 100, the airflow is accelerated.
  • a filter screen is provided at the air inlet channel, so as to reduce dust and foreign matters from entering the centrifugal fan 100 .
  • the bladeless fan 200 also includes an air outlet assembly 220 , the air outlet assembly 220 includes a flow splitter 230 and an air discharge portion 240 , and the flow splitter 230 communicates the exhaust portion 240 with the air outlet 150 of the centrifugal fan 100 . After the airflow accelerated by the centrifugal fan 100 enters the splitter 230, the airflow is split, and the splitted airflow enters different exhaust sections 240 respectively.
  • the exhaust section 240 is provided with tuyere, and the airflow is blown out to the outside from the tuyere.
  • the electrical equipment may also be a range hood or an air conditioner.

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

Abstract

一种离心风机（100）和电器设备（200）。离心风机（100）包括蜗壳（110）和蜗舌（120）；蜗舌（120）与蜗壳（110）围合形成风轮腔（130）及出风腔（140），风轮腔（130）用以供风轮（160）安装，出风腔（140）与风轮腔（130）连通并具有出风口（150）；蜗舌（120）包括朝向风轮（160）的风轮侧壁面（121）及朝向出风腔（140）的出风侧壁面（122），出风侧壁面（122）包括与风轮侧壁面（121）连接的出风侧弧面（123）、自出风侧弧面（123）朝向远离出风腔（140）的一侧延伸的台阶面（124），及自台阶面（124）朝向出风口（150）的边沿延伸的导流面（125）。该风机降低了噪音。

Description

离心风机和电器设备
本申请要求于2021年12月15日申请的、申请号为202111538836.3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。
技术领域
本申请涉及风机技术领域，特别涉及一种离心风机和电器设备。
 背景技术
离心风机是一种流体机械，它依靠输入的机械能，提高气体压力并将气体排出。离心风机包括蜗壳、蜗舌和风轮，其中，蜗舌的作用是阻止风轮产生的气流回流至蜗壳内部，从而将风轮产生的气流导向至蜗壳的出风腔，将气流从蜗壳的出风口排出。在相关技术中，气流在出风口会产生涡流，涡流会反复震荡撞击蜗壳的侧壁面，从而产生较大的噪音。
上述内容仅用于辅助理解发明的技术方案，并不代表承认上述内容是现有技术。
 技术问题
本申请的主要目的是提出一种离心风机，旨在解决现有离心风机噪音较大的技术问题。
 技术解决方案
为实现上述目的，本申请提出的离心风机包括：
风轮；
蜗壳；
蜗舌，所述蜗舌与所述蜗壳围合形成风轮腔及出风腔，所述风轮腔用以供所述风轮安装，所述出风腔与所述风轮腔连通并具有出风口；所述蜗舌包括朝向所述风轮的风轮侧壁面及朝向所述出风腔的出风侧壁面，所述出风侧壁面包括与所述风轮侧壁面连接的出风侧弧面、自所述出风侧弧面朝向远离所述出风腔的一侧延伸的台阶面，及自所述台阶面朝向所述出风口的边沿延伸的导流面。
在一实施例中，所述台阶面与所述出风口所在的平面平行。
在一实施例中，所述台阶面在所述出风口所在平面的投影的宽度为10~40mm。所述台阶面与风轮侧壁面之间的距离为10~50mm。
在一实施例中，所述蜗壳包括第一盖板、第二盖板和设于所述第一盖板和所述第二盖板之间的蜗卷侧板，所述蜗舌设于所述第一盖板与所述第二盖板之间并与所述蜗卷侧板连接，所述蜗卷侧板包括出风部，所述出风部与所述蜗舌、所述第一盖板和所述第二盖板围合成所述出风腔，所述导流面与所述出风部之间的距离大于所述出风侧弧面与所述出风部之间的距离。
在一实施例中，所述出风侧弧面上设置有碎涡件，所述碎涡件用以破碎涡流。
在一实施例中，所述碎涡件包括第一碎涡部和第二碎涡部，所述第一碎涡部靠近所述风轮腔的一端和所述第二碎涡部靠近所述风轮腔的一端连接，所述第一碎涡部和所述第二碎涡部的夹角小于或等于60°，所述第一碎涡部与所述第二碎涡部之间的距离在所述风轮腔朝向所述出风口的方向上逐渐增大。
在一实施例中，所述碎涡件远离所述出风侧弧面的表面与所述出风侧弧面呈夹角设置，所述碎涡件远离所述出风侧弧面的表面与所述出风侧弧面的夹角小于或等于30°。
在一实施例中，所述风轮侧壁面上设有挡流件，所述挡流件用于减少气流在所述蜗舌处的回流。
本申请还提出一种电器设备，该电器设备包括壳体和离心风机，所述离心风机设于所述壳体内，所述离心风机包括蜗壳和蜗舌；所述蜗舌与所述蜗壳围合形成风轮腔及出风腔，所述风轮腔用以供风轮安装，所述出风腔与所述风轮腔连通并具有出风口；所述蜗舌包括朝向所述风轮的风轮侧壁面及朝向所述出风腔的出风侧壁面，所述出风侧壁面包括与所述风轮侧壁面连接的出风侧弧面、自所述出风侧弧面朝向远离所述出风腔的一侧延伸的台阶面，及自所述台阶面朝向所述出风口的边沿延伸的导流面。
在一实施例中，所述电器设备为无叶风扇。
 有益效果
本申请的离心风机包括蜗壳和蜗舌；所述蜗舌与所述蜗壳围合形成风轮腔及出风腔，所述风轮腔用以供风轮安装，所述出风腔与所述风轮腔连通并具有出风口；所述蜗舌包括朝向所述风轮的风轮侧壁面及朝向所述出风腔的出风侧壁面，所述出风侧壁面包括与所述风轮侧壁面连接的出风侧弧面、自所述出风侧弧面朝向远离所述出风腔的一侧延伸的台阶面，及自所述台阶面朝向所述出风口的边沿延伸的导流面。如此，一方面通过设置出风侧弧面，一定程度上抑制了出风腔内涡流的产生，减少了出风腔气流堵塞，增加了出风流畅性，降低了噪音；另一方面通过设置台阶面和导流面，转移了出风腔内涡流的位置，避免涡流的震荡，进一步减小了噪音。
 附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图示出的结构获得其他的附图。
图1为本申请离心风机一实施例的结构示意图；
图2为图1的结构剖面图；
图3为图2中A处的放大图；
图4为图2中离心风机的俯视图；
图5为图4中B处的放大图；
图6为本申请离心风机的蜗舌的细节图；
图7本申请无叶风扇一实施例的结构示意图；
图8为图7的侧视图。
附图标号说明：
标号 名称 标号 名称 标号 名称
100 离心风机 121 风轮侧壁面 140 出风腔
110 蜗壳 121a 挡流件 150 出风口
111 第一盖板 122 出风侧壁面 160 风轮
112 第二盖板 123 出风侧弧面 200 无叶风扇
113 蜗卷侧板 123a 碎涡件 210 壳体
114 出风部 124 台阶面 220 出风组件
115 蜗卷部 125 导流面 230 分流部
120 蜗舌 130 风轮腔 240 排风部
本申请目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
 本发明的实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请的一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
需要说明，若本申请实施例中有涉及方向性指示(诸如上、下、左、右、前、后……)，则该方向性指示仅用于解释在某一特定姿态(如附图所示)下各部件之间的相对位置关系、运动情况等，如果该特定姿态发生改变时，则该方向性指示也相应地随之改变。
需要说明，若本申请实施例中有涉及“第一”、“第二”等的描述，则该“第一”、“第二”等的描述仅用于描述目的，而不能理解为指示或暗示其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至少一个该特征。另外，全文中出现的“和/或”的含义为，包括三个并列的方案，以“A和/或B”为例，包括A方案，或B方案，或A和B同时满足的方案。
本申请提出一种离心风机。
在本申请实施例中，如图1至图4所示，该离心风机100包括蜗壳110和蜗舌120；所述蜗舌120与所述蜗壳110围合形成风轮腔130及出风腔140，所述风轮腔130用以供风轮160安装，所述出风腔140与所述风轮腔130连通并具有出风口150；所述蜗舌120包括朝向所述风轮160的风轮侧壁面121及朝向所述出风腔140的出风侧壁面122，所述出风侧壁面122包括与所述风轮侧壁面121连接的出风侧弧面122、自所述出风侧弧面123朝向远离所述出风腔140的一侧延伸的台阶面124，及自所述台阶面124朝向所述出风口150的边沿延伸的导流面125。
具体而言，所述蜗壳110设有与所述风轮腔130连通的进风口，气流从所述进风口进入风轮腔130内。所述进风口的数量可以是一个，进风口开设于所述蜗壳110的其中一侧；所述进风口的数量可以是两个，两个进风口分别开设于所述蜗壳110相对的两侧。风轮160安装于所述风轮腔130内，风轮160在驱动装置的驱动下旋转，从而在风轮腔130内产生负压，气流从进风口进入到风轮腔130内，然后在风轮160的作用下，气流进一步地加速，加速后的气流在蜗舌120的作用下流动至出风腔140内，然后从出风口150排出。在一实施例中，所述进风口处安装有集流器，从而将气流均匀地导入风轮腔130内，从而降低气流的损失。
所述蜗壳110包括第一盖板111、第二盖板112和设于所述第一盖板111和所述第二盖板112之间的蜗卷侧板113，所述蜗舌120设于所述第一盖板111与所述第二盖板112之间并与所述蜗卷侧板113连接。所述蜗舌120用于将气流分流，阻止气流在风轮腔130内的循环流动，将气流导向至所述出风口150。所述蜗舌120包括风轮侧壁面121、出风侧弧面122、台阶面124及导流面125。所述风轮侧壁面121与出风侧弧面122圆滑过渡，所述风轮侧壁面121与所述蜗卷侧板113连接。所述风轮侧壁面121自所述出风侧弧面122向远离所述出风腔140的方向延伸，所述风轮侧壁面121与所述风轮160之间的距离在远离所述出风腔140的方向上逐渐增大，如此可以使得风轮腔130内的气流流动更加顺畅，从而提升出风量。
所述出风侧弧面122在向远离所述出风腔140的方向凹陷，从而形成内凹的弧面。可以理解的是，现有离心风机100中，气流在出风腔140内出风时，由于气流具有粘性，第一盖板111与第二盖板112会对气流产生阻力，气流会受到第一盖板111和第二盖板112处边界层的影响，使得靠近第一盖板111和第二盖板112的气流速度较小，靠近出风腔140中部处的气流速度较大；会导致出风腔140的气流在第一盖板111朝向第二盖板112的方向上会有速度差，从而会产生压力差，第一盖板111与第二盖板112之间会有压力梯度。在这个压力梯度的作用下，气流会在靠近第一盖板111与第二盖板112处形成局部的涡流，该涡流会导致出风腔140流道的堵塞，导致出风不畅产生噪音。如图4所示，将出风侧弧面122设置为向远离出风腔140方向内凹的弧面，如此可以使得出风腔140中部的出风面积增大，从而使得出风腔140中部气流的速度减小，进而减小了第一盖板111与第二盖板112间气流的速度差，减弱了气流的压力差，降低了气流的压力梯度。如此可以一定程度上抑制涡流的产生，减少了出风腔140流道的堵塞，增加出风流畅性，减少噪音的产生。值得一提的是，将出风侧弧面122凹陷设置还可以使得经过风轮160加速过的气流在冲击蜗舌120时产生一定的时间差，从而使气流产生相位差，从而减弱了不同频率间噪声的耦合强化，进一步起到降噪的功能。
进一步地，所述出风侧弧面122凹陷的形状应当与出风腔140内气流的压力梯度相对应，从而使得出风腔140内的气流速度较为均匀，使得出风侧弧面122能够更好地减弱气流的压力梯度，更好地避免涡流的产生。例如，当所述蜗壳110具有两个进风口时，设于所述风轮腔130内的风轮160具有前盘、中盘和后盘，此时经过风轮160加速的气流在叶轮中盘的位置速度较大，则所述出风侧弧面122上与出风腔140距离最远的点与风轮160的中盘对齐，从而起到更好地减弱气流压力梯度的效果。
参阅图2，所述台阶面124向外突扩，与所述导流面125以及蜗壳110的第一盖板111和第二盖板112围合形成了容纳涡流的空间，台阶面124与导流面125的设置使得出风口150处的涡流转移到了台阶面124与导流面125交界的角点处，从而使得涡流的位置远离出风侧弧面122与蜗壳110围合形成的出风风道，进一步地减少了了出风口150处的涡流堵塞出风腔140，避免涡流的震荡，降低噪音。导流面125的设置也使得出风口150增大，从而能够增加离心风机100的出风量。
本申请的离心风机100包括蜗壳110和蜗舌120；所述蜗舌120与所述蜗壳110围合形成风轮腔130及出风腔140，所述风轮腔130用以供风轮160安装，所述出风腔140与所述风轮腔130连通并具有出风口150；所述蜗舌120包括朝向所述风轮腔130的风轮侧壁面121及朝向所述出风腔140的出风侧壁面122，所述出风侧壁面122包括与所述风轮侧壁面121连接的出风侧弧面122、自所述出风侧弧面123朝向远离所述出风腔140的一侧延伸的台阶面124，及自所述台阶面124朝向所述出风口150的边沿延伸的导流面125。如此，一方面通过设置出风侧弧面122，一定程度上抑制了出风腔140内涡流的产生，减少了了出风腔140堵塞，增加了出风流畅性，降低了噪音；另一方面通过设置台阶面124和导流面125，转移了出风腔140内涡流的位置，避免涡流的震荡，进一步减小了噪音。
在一实施例中，所述台阶面124与所述出风口150所在的平面平行。其中，台阶面124与出风口150所在平面平行，一方面可以便于离心风机的生产制造，另一方面可以使得涡流的位置与出风风道的距离更远，极大程度上的保证了涡流不对出风气流产生影响，进而降低噪音、增大出风量。
在一实施例中，所述台阶面124在所述出风口150所在平面的投影的宽度为10~40mm。请参阅图2，其中，所述宽度即为所述出风侧弧面122与所述导流面125之间的距离在出风口150所在平面的投影，即图中的L。该宽度若小于10mm则涡流的位置无法完全转移，仍然会对出风腔140产生堵塞，产生一定幅度的震荡，导致噪音的产生。该宽度若大于40mm，台阶面124延伸过宽，会导致出风口150的面积过大，会对离心风机100产生的气流造成能量损失，影响离心风机100的出风效果。
在一实施例中，所述台阶面124与风轮侧壁面121之间的距离为10~50mm。其中，所述台阶面124与风轮侧壁面121之间的距离是指，所述风轮侧壁面121的最高点到所述台阶面124所在水平面的距离，即图2中的H。该距离若大于50mm，会导致出风腔140出风风道过长，则导致出风口150处产生的涡流不易转移至台阶面124处，涡流仍然会产生噪音。该距离若小于10mm，则会导致出风侧弧面122无法有效对气流压力梯度进行减弱，并且会导致出风侧弧面122无法对气流进行足够的导流作用，容易产生湍流，导致出风不畅。
在一实施例中，所述蜗壳110包括第一盖板111、第二盖板112和设于所述第一盖板111和所述第二盖板112之间的蜗卷侧板113，所述蜗舌120设于所述第一盖板111与所述第二盖板112之间并与所述蜗卷侧板113连接，所述蜗卷侧板113包括与所述出风腔140对应的出风部114，所述导流面125与所述出风部114之间的距离大于所述出风侧弧面122与所述出风部114之间的距离。
如图1和图2所示，其中，所述第一盖板111、所述第二盖板112与所述蜗卷侧板113共同围合出蜗壳110。所述蜗卷侧板113包括与出风部114和蜗卷部115，所述出风部114与所述蜗舌120、所述第一盖板111和所述第二盖板112围合出所述出风腔140，所述蜗卷部115与所述蜗舌120、所述第一盖板111和所述第二盖板112围合出所述风轮腔130。风轮160加速过的气流从出风侧弧面122与出风部114之间的出风风道流至出风腔140，然后从出风口150排出，所述导流面125与所述出风部114之间的距离大于所述出风侧弧面122与所述出风部114之间的距离，如此避免了气流出风时经过台阶面124与导流面125的角点处，从而避免了涡流对出风气流的影响，避免出风腔140堵塞，减少湍流产生，降低噪音。
在上述实施例的基础上，所述出风侧弧面122上设置有碎涡件123a，所述碎涡件123a用以破碎涡流。
参阅图2和图3，具体而言，在出风壁侧弧面上设置的碎涡件123a的数量可以是一个，也可以是多个，若所述碎涡件123a的数量为多个，则多个所述碎涡件123a沿着第一盖板111朝向第二盖板112的方向上间隔设置。通过设置所述碎涡件123a，可以将出风腔140靠近出风侧弧面122的涡流从较大的涡流切割破碎为较小的涡流，从而降低涡流对气流出风的影响，增加出风的流畅性，避免了噪音的产生。
在一实施例中，所述碎涡件123a包括第一碎涡部和第二碎涡部，所述第一碎涡部靠近所述风轮腔130的一端和所述第二碎涡部靠近所述风轮腔130的一端连接，所述第一碎涡部和所述第二碎涡部的夹角小于或等于60°，所述第一碎涡部与所述第二碎涡部之间的距离在所述风轮160朝向所述出风口150的方向上逐渐增大。
其中，所述碎涡件123a呈三角形设置，所述第一碎涡部与所述第二碎涡部呈长条状设置。所述第一碎涡部与所述第二碎涡部之间的距离在靠近出风口150的方向上逐渐增大，如此可以使得碎涡件123a对涡流起到更好地破碎作用，第一碎涡部和第二碎涡部对破碎后的涡流起到导向作用，使涡流能够沿着出风侧弧面122吹出，避免破碎后的涡流向不同的位置移动，避免涡流对气流产生影响。进一步地，若第一碎涡部与第二碎涡部的夹角大于60°，则会导致碎涡件123a对气流产生较大的阻碍作用，反而导致了涡流的产生，会导致出风不畅，不利与噪音的降低。
在一实施例中，所述碎涡件123a远离所述出风侧弧面122的表面与所述出风侧弧面122呈夹角设置，所述碎涡件123a远离所述出风侧弧面122的表面与所述出风侧弧面122的夹角小于或等于30°。
其中，出风侧弧面122的表面与所述出风侧弧面122的夹角设置，可以增加碎涡件123a破碎涡流的效果。请参阅图3，所述碎涡件123a远离所述出风侧弧面122的表面与所述出风侧弧面122的夹角即为图中的α。碎涡件123a凸设于所述出风侧弧面122上，若该夹角大于30°则会导致碎涡件123a靠近出风口150的一端凸出的高度过高，会使得碎涡件123a对出风腔140内的气流产生影响，会导致噪音的产生。
在一实施例中，所述风轮侧壁面121上设有挡流件121a，所述挡流件121a用于减少气流在所述蜗舌120处的回流，从而增大气流流入出风腔140的流量，起到增大出风量的效果。需要说明的是，所述挡流件121a的形式可以呈V形，该挡流件121a包括第一挡流部和第二挡流部，第一挡流部和第二挡流部的距离在远离出风腔140的方向上逐渐增大。所述挡流件121a也可以是楔形块的形式，在此不做具体限定。在一实施例中，所述挡流件121a靠近风轮160一侧的表面与所述风轮侧壁面121之间呈夹角设置，该夹角小于或等于30°。挡流件121a表面与风轮侧壁面121呈夹角设置可以使挡流件121a一方面可以起到一定的阻挡气流的作用，另一方面可以避免挡流件121a完全阻挡气流的回流，若完全阻挡气流的回流，则会导致风轮侧避免与风轮160间的负压过大，产生噪音。值得一提的是，所述挡流件121a凸设于所述风轮侧壁面121上，所述挡流件121a凸出最高点与风轮160之间的距离应当大于所述出风侧弧面122到风轮160的距离。如此可以避免挡流件121a对气流产过度的阻挡作用，并且保证在风轮160的转动方向上，风轮160与蜗卷侧板113以及蜗舌120的距离是逐渐增大的，避免由于该距离产生突变导致风轮腔130内部的气流产生突变，导致涡流的产生，进而避免噪音的产生。
本申请还提出一种电器设备，该电器设备包括壳体210和离心风机100，该离心风机100的具体结构参照上述实施例，由于本电器设备采用了上述所有实施例的全部技术方案，因此至少具有上述实施例的技术方案所带来的所有有益效果，在此不再一一赘述。
在一实施例中，所述电器设备为无叶风扇200。无叶风扇200一般包括壳体210，所述离心风机100设置于所述壳体210内，所述壳体210上设置有进风通道，气流从进风通道进入到壳体210内，然后进入到离心风机100内，对气流进行加速。在一实施例中，进风通道处设置有滤网，从而减少灰尘以及异物进入到离心风机100内。无叶风扇200还包括有出风组件220，所述出风组件220包括分流部230与排风部240，所述分流部230连通所述排风部240与所述离心风机100出风口150。离心风机100加速的气流进入到分流部230后，将气流分流，分流后的气流分别进入到不同的排风部240中，排风部240上设置有风口，气流从风口吹出至外界。当然，在其他实施例中，所述电器设备还可以是吸油烟机或空调器等。
以上所述仅为本申请的可选实施例，并非因此限制本申请的专利范围，凡是在本申请的构思下，利用本申请说明书及附图内容所作的等效结构变换，或直接/间接运用在其他相关的技术领域均包括在本申请的专利保护范围内。

Claims (10)

  1. 一种离心风机，其中，所述离心风机包括：
    蜗壳；
    蜗舌，所述蜗舌与所述蜗壳围合形成风轮腔及出风腔，所述风轮腔用以供风轮安装，所述出风腔与所述风轮腔连通并具有出风口；所述蜗舌包括朝向所述风轮的风轮侧壁面及朝向所述出风腔的出风侧壁面，所述出风侧壁面包括与所述风轮侧壁面连接的出风侧弧面、自所述出风侧弧面朝向远离所述出风腔的一侧延伸的台阶面，及自所述台阶面朝向所述出风口的边沿延伸的导流面。
  2. 如权利要求1所述的离心风机，其中，所述台阶面与所述出风口所在的平面平行。
  3. 如权利要求1所述的离心风机，其中，所述台阶面在所述出风口所在平面的投影的宽度为10~40mm，所述台阶面与风轮侧壁面之间的距离为10~50mm。
  4. 如权利要求1所述的离心风机，其中，所述蜗壳包括第一盖板、第二盖板和设于所述第一盖板和所述第二盖板之间的蜗卷侧板，所述蜗舌设于所述第一盖板与所述第二盖板之间并与所述蜗卷侧板连接，所述蜗卷侧板包括出风部，所述出风部与所述蜗舌、所述第一盖板和所述第二盖板围合成所述出风腔，所述导流面与所述出风部之间的距离大于所述出风侧弧面与所述出风部之间的距离。
  5. 如权利要求1至4任意一项所述的离心风机，其中，所述出风侧弧面上设置有碎涡件，所述碎涡件用以破碎涡流。
  6. 如权利要求5所述的离心风机，其中，所述碎涡件包括第一碎涡部和第二碎涡部，所述第一碎涡部靠近所述风轮腔的一端和所述第二碎涡部靠近所述风轮腔的一端连接，所述第一碎涡部和所述第二碎涡部的夹角小于或等于60°，所述第一碎涡部与所述第二碎涡部之间的距离在所述风轮腔朝向所述出风口的方向上逐渐增大。
  7. 如权利要求6所述的离心风机，其中，所述碎涡件远离所述出风侧弧面的表面与所述出风侧弧面呈夹角设置，所述碎涡件远离所述出风侧弧面的表面与所述出风侧弧面的夹角小于或等于30°。
  8. 如权利要求1所述的离心风机，其中，所述风轮侧壁面上设有挡流件，所述挡流件用于减少气流在所述蜗舌处的回流。
  9. 一种电器设备，其中，所述电器设备包括壳体和如权利要求1至8中任意一项所述的离心风机，所述离心风机安装于所述壳体内。
  10. 如权利要求9所述的电器设备，其中，所述电器设备为无叶风扇。
PCT/CN2022/125202 2021-12-15 2022-10-13 离心风机和电器设备 WO2023109287A1 (zh)

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