阅读说明：本技术 离心风机和吸尘器 (Centrifugal blower and dust catcher ) 是由 胡斯特 李书奇 张辉 于 2018-05-22 设计创作，主要内容包括：本发明提出了一种离心风机和吸尘器,其中,离心风机包括：风机罩,风机罩设置有进风口；动叶轮,设置于风机罩内,并靠近进风口设置；静叶组件,设置于风机罩内,并设置于动叶轮的下游,静叶组件包括叶片扩压器,叶片扩压器包括轮盘以及设置于轮盘上的多个扩压叶片,多个扩压叶片沿轮盘的周向间隔分布于轮盘的外侧壁上,扩压叶片能够沿轮盘的轴向延伸,以与风机罩的内侧壁之间限定出轴向的扩压通道。通过本发明的技术方案,能够增加动叶轮与静压组件之间的距离,结合沿轴向延伸的扩压叶片,实现对由动叶轮导出的气流实现扩压的效果,进而降低流速,提高静压,以在不增加径向尺寸的前提下提高整机的运行效率。(The invention proposes a kind of centrifugal blower and dust catchers, wherein centrifugal blower includes: fan shroud, and fan shroud is provided with air inlet；Movable vane wheel, is set in fan shroud, and is arranged close to air inlet；Stationary vane assembly, it is set in fan shroud, and it is set to the downstream of movable vane wheel, stationary vane assembly includes vane diffuser, vane diffuser includes wheel disc and multiple diffusion blades for being set on wheel disc, for multiple diffusion blades along the circumferentially-spaced lateral wall for being distributed in wheel disc of wheel disc, diffusion blade can be along the axially extending of wheel disc, to limit axial diffusion channel between the inner sidewall of fan shroud.According to the technical solution of the present invention, the distance between movable vane wheel and static pressure component can be increased, in conjunction with the diffusion blade axially extended, realize the effect that diffusion is realized to the air-flow as derived from movable vane wheel, and then reduce flow velocity, static pressure is improved, to improve the operational efficiency of complete machine under the premise of not increasing radial dimension.)

1. a kind of centrifugal blower characterized by comprising

Fan shroud, the fan shroud are provided with air inlet；

Movable vane wheel is set in the fan shroud, and is arranged close to the air inlet；

Stationary vane assembly is set in the fan shroud, and is set to the downstream of the movable vane wheel, and the stationary vane assembly includes blade Diffuser, the vane diffuser include wheel disc and multiple diffusion blades for being set on the wheel disc, the multiple diffusion For blade along the circumferentially-spaced lateral wall for being distributed in the wheel disc of the wheel disc, the diffusion blade can be along the wheel disc It is axially extending, to limit the axial diffusion channel between the inner sidewall of the fan shroud.

2. centrifugal blower according to claim 1, which is characterized in that the stationary vane assembly further include:

Return channel, is set to the return channel in the vane diffuser downstream, the return channel include be set to back on it is described into Multiple return channel blades on the end face of the wheel disc in air port, axial direction of the multiple return channel blade along the wheel disc Interval setting, the return channel blade can extend to the center of the wheel disc,

Wherein, the return channel is an integral molding structure with the vane diffuser.

3. centrifugal blower according to claim 1, which is characterized in that the stationary vane assembly further include:

Support ring is set to the periphery of the vane diffuser, and can cooperate with the inner sidewall of the fan shroud and assemble, described Support ring is used to support the vane diffuser, limits the axis between the diffusion blade and the inner sidewall of the support ring To diffusion channel,

Wherein, buckle, the support ring and institute are provided in one circumferential edge in the support ring and the fan shroud State be provided in the circumferential edge of another in fan shroud can with the buckle slot of the assembling that is clasped, to the branch Pushing out ring carries out circumferential limit.

4. centrifugal blower according to claim 1, which is characterized in that

The diffusion blade is arranged along the peripheral, oblique, and the diffusion blade is greater than or equal to along the circumferential inlet angle 10 °, and it is less than or equal to 40 °.

5. centrifugal blower according to claim 4, which is characterized in that

The diffusion blade is greater than or equal to 20 ° along the circumferential inlet angle, and is less than or equal to 25 °.

6. centrifugal blower according to claim 4, which is characterized in that

Differential seat angle of the diffusion blade between the circumferential angle of outlet and the inlet angle is greater than or equal to 10 °, and small In or equal to 50 °.

7. centrifugal blower according to claim 6, which is characterized in that

Differential seat angle of the diffusion blade between the circumferential angle of outlet and the inlet angle is greater than or equal to 15 °, and small In or equal to 25 °.

8. centrifugal blower according to claim 1, which is characterized in that

The quantity of the multiple diffusion blade is greater than or equal to 10, and is less than or equal to 35；

Wherein, the multiple diffusion blade is wing blades or straight blade.

9. the centrifugal blower according to any one of claim 3 to 8, which is characterized in that further include:

Wind loop is set to the downstream of the stationary vane assembly, and can cooperate with the support ring and dock assembling；

Motor is set to the downstream of the wind loop, and can be connected to the movable vane wheel.

10. a kind of dust catcher characterized by comprising

Centrifugal blower as claimed in any one of claims 1-9 wherein.

Technical field

The present invention relates to household appliances fields, in particular to a kind of centrifugal blower and a kind of dust catcher.

Background technique

Centrifugal blower in existing dust catcher is usually made of fan shroud, movable vane wheel, stator blade, wind loop, and stator blade includes back Flow device and vaned diffuser.Movable vane wheel and stator blade are in the shell that fan shroud and wind loop form, and stator blade is located at movable vane wheel Downstream defines airflow path, but still has the following deficiencies: between inner walls and stator blade

(1) diffuser vane in stator blade is radially laid on specified end face, smaller in the inner space of dust catcher, wind When the outer diameter of hood and the outer diameter of movable vane wheel are not much different, without the diffuser vane of enough space layout radial directions, movable vane wheel The high-speed flow of outlet enters rotating channel and return channel after very short vaneless diffuser, causes air-flow effective Diffusion slow down, overall efficiency is lower.

(2) centrifugal blower is when using radial diffuser vane is laid with, due to the leading edge and movable vane of diffuser vane The high-speed flow of the distance between outlet of wheel very little, dynamic impeller outlet impacts radial diffuser blade inlet edge, causes to generate Higher noise.

Summary of the invention

At least one in order to solve the above-mentioned technical problem, it is an object of the present invention to provide a kind of centrifugal blowers.

It is another object of the present invention to provide a kind of dust catchers.

To achieve the goals above, the embodiment of first aspect present invention proposes a kind of centrifugal blower, comprising: blower Cover, fan shroud are provided with air inlet；Movable vane wheel, is set in fan shroud, and is arranged close to air inlet；Stationary vane assembly is set to In fan shroud, and it is set to the downstream of movable vane wheel, stationary vane assembly includes vane diffuser, and vane diffuser includes wheel disc and sets The multiple diffusion blades being placed on wheel disc, multiple diffusion blades expand along the circumferentially-spaced lateral wall for being distributed in wheel disc of wheel disc Press blade can be along the axially extending of wheel disc, to limit axial diffusion channel between the inner sidewall of fan shroud.

In the technical scheme, stationary vane assembly includes vane diffuser, more by being circumferentially arranged on the lateral wall of wheel disc Vane diffuser structure is set as axial blade diffuser, axial blade diffuser and diameter in the prior art by a diffusion blade It is compared to vane diffuser, on the one hand, limited in the household appliance for being provided with the centrifugal blower, such as the inner space of dust catcher When, it replaces laying diffusion blade, energy on the end face of wheel disc using the axial blade diffuser for laying diffusion blade on side wall Enough increase the distance between movable vane wheel and static pressure component, in conjunction with the diffusion blade axially extended, realization is exported to by movable vane wheel Air-flow realize diffusion effect, and then reduce flow velocity, improve static pressure, to improve complete machine under the premise of not increasing radial dimension Operational efficiency, on the other hand, diffusion blade can axially extend, so that shape between diffusion blade and the inner sidewall of fan shroud At axial diffusion channel, increase in conjunction with the distance between movable vane wheel and static pressure component, air-flow is entering axial blade diffuser Before, first carried out between movable vane wheel and static pressure component it is a degree of mix diffusion, in conjunction with axial diffusion channel, Neng Goujin One step reduces flow velocity, promotes the uniformity of air-flow, and then reduce the operation noise of centrifugal blower.

Specifically, so-called radial diffusion blade, to be arranged on the end face of wheel disc, and the blade radially extended, And form the axial diffusion blade of axial blade diffuser, then to be arranged on the side wall of the circumference of wheel disc, and prolong along axial direction The blade stretched, compared with radial diffusion blade, on the one hand axial diffusion blade can increase between movable vane wheel and wheel disc On the other hand distance also can reduce the radial dimension of wheel disc, to be conducive to reduce the dust catcher that the centrifugal blower is arranged Overall dimensions.

In addition, the centrifugal blower in above-described embodiment provided by the invention can also have following additional technical feature:

In the above-mentioned technical solutions, it is preferable that stationary vane assembly further include: return channel is set to vane diffuser downstream Return channel, return channel include the multiple return channel blades being set to back on the end face of the wheel disc of air inlet, multiple return channels Blade is arranged along the axially spaced-apart of wheel disc, and return channel blade can extend to the center of wheel disc, wherein return channel and blade diffusion Device is an integral molding structure.

In the technical scheme, by the way that return channel is arranged, return channel includes being set to back on the end of the wheel disc of air inlet Multiple return channel blades on face, return channel blade can extend to the center of wheel disc, to make the air-flow by diffusion blade Along return channel blade to central backflow, and then be conducive to be promoted the operational efficiency of anode.

In any of the above-described technical solution, it is preferable that stationary vane assembly further include: support ring is set to vane diffuser Periphery, and can cooperate with the inner sidewall of fan shroud and assemble, support ring is used to support vane diffuser, diffusion blade and support ring Inner sidewall between limit axial diffusion channel, wherein be arranged in support ring and one in fan shroud circumferential edge Have a buckle, be provided in another the circumferential edge in support ring and fan shroud can with the buckle slot for the assembling that is clasped, To carry out circumferential limit to support ring.

In the technical scheme, by the way that support ring is arranged between vane diffuser and fan shroud, on the one hand, can pass through Support ring is supported axial diffusion blade, and then promotes the stability of vane diffuser, on the other hand, by supporting Mutually matched buckle and card slot is respectively set on ring and fan shroud, while realizing that support ring is circumferentially positioned, realizes branch Assembly assembling between pushing out ring and fan shroud, and advantageously reduce preparation cost.

Specifically, the radial diffusion blade of stationary vane assembly is changed to axial diffusion blade, axial blade diffuser and Return channel blade and the preparation of wheel disc (i.e. return channel ontology) integrated formed structure, axial diffusion blade are arranged in return channel leaf The upstream of piece is provided with a circle support ring on the outside of axial blade diffuser, and support ring is for providing fitting surface and buckle slot It, by vaneless diffuser, is then flowed under the action of fan shroud to install fan shroud after the outlet outflow of air-flow driven impeller Moving direction becomes axial from radial, and by the way that circumferential vane diffuser is arranged, into the axial direction part before return channel, air-flow passes through Axial diffusion channel, realizes the guidance diffusion to air-flow.

In any of the above-described technical solution, it is preferable that diffusion blade is circumferentially obliquely installed, diffusion blade entering circumferentially Bicker is greater than or equal to 10 °, and is less than or equal to 40 °.

In the technical scheme, diffusion blade is also circumferentially obliquely installed while axially extending, and will be in upstream The endpoint of diffusion blade be determined as blade inlet edge, the endpoint of the diffusion blade in downstream is determined as trailing edge, by leaf Angle between piece leading edge and the front end face of wheel disc is determined as inlet angle, by the range for limiting inlet angle, on the one hand, Neng Gouyan On the other hand the length range in long diffusion channel is conducive to promote diffusion effect, to realize that diffusion slows down.

In any of the above-described technical solution, it is preferable that the inlet angle of diffusion blade circumferentially is greater than or equal to 20 °, and small In or equal to 25 °.

In the technical scheme, by further decreasing the restriction range of inlet angle, on the one hand, can further promote expansion Effect is pressed on the other hand to can reduce the difficulty of preparation.

In any of the above-described technical solution, it is preferable that the angle between the angle of outlet and inlet angle of diffusion blade circumferentially Difference is greater than or equal to 10 °, and is less than or equal to 50 °.

In the technical scheme, the angle between trailing edge and the end face of wheel disc is determined as the angle of outlet, passes through restriction Angle difference between the angle of outlet and the angle of outlet of diffusion blade, to limit the blade camber of diffusion blade, and further really The angle of outlet for determining diffusion blade reduces noise while obtaining optimal diffusion effect.

In any of the above-described technical solution, it is preferable that the angle between the angle of outlet and inlet angle of diffusion blade circumferentially Difference is greater than or equal to 15 °, and is less than or equal to 25 °.

In the technical scheme, by further limiting the angular range of differential seat angle, to advanced optimize diffusion reduction of speed effect Fruit, and then the operational efficiency of centrifugal blower is improved to the maximum extent.

Specifically, when the inlet angle of diffusion blade is 20 °, the angle of outlet can be between 35 ° and 45 °, in diffusion blade Inlet angle be 25 ° when, the angle of outlet can be between 40 ° and 50 °.

In any of the above-described technical solution, it is preferable that the quantity of multiple diffusion blades be greater than or equal to 10, and be less than or Equal to 35；Wherein, multiple diffusion blades are wing blades or straight blade.

In the technical scheme, diffusion blade can be set as wing blades or straight blade with structure, wherein airfoil type leaf The shape design of the cross section of blade is the similar streamlined structure with aircraft wing by piece, is conducive to using wing blades Reduce gas-flow resistance, and then be conducive to be promoted the operational efficiency of centrifugal blower, and straight blade is used to meet axial diffusion While demand, preparation cost is lower.

In addition, by the quantity for limiting diffusion blade, to combine the demand of vane diffuser diffusion action and preparation, Wherein, when the quantity of diffusion blade is 10, preparation process is simpler, when the quantity of diffusion blade is 35, diffusion drop The effect of speed is more preferable.

In any of the above-described technical solution, it is preferable that further include: wind loop is set to the downstream of stationary vane assembly, and can Assembling is docked with support ring cooperation；Motor is set to the downstream of wind loop, and can be connected to movable vane wheel.

In the technical scheme, by the way that wind loop is arranged, windproof effect is realized.

The embodiment of second aspect of the present invention proposes a kind of dust catcher, in the technical solution including first aspect present invention Centrifugal blower described in any embodiment.

One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

(1) the diffusion blade axial by arrangement can make air-flow going out in movable vane wheel to form axial blade diffuser Diffusion is generated between mouth and the import of return channel, to reduce flow velocity, improves static pressure, and then improve the overall efficiency of centrifugal blower, And the radial dimension of complete machine can be reduced.

(2) by arranging axial vane diffuser, so that the distance between outlet of diffuser vane and movable vane wheel increases, Air-flow has carried out a degree of blending and diffusion, speed in no leaf radial direction diffuser before entering axial blade diffuser It reduces, airflow homogeneity enhancing, therefore the noise that axial blade diffuser generates is lower.

(3) compared with radial blade diffuser, increase support ring on the top of axial diffuser vane, and provide fitting surface Fan shroud and wind loop are installed with buckle slot, advantageously reduce cost.

Additional aspect and advantage of the invention will become obviously in following description section, or practice through the invention Recognize.

Detailed description of the invention

Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures Obviously and it is readily appreciated that, in which:

Fig. 1 shows the configuration schematic diagram of centrifugal blower according to an embodiment of the invention；

Fig. 2 shows the schematic diagram of the section structure of centrifugal blower according to an embodiment of the invention:

Fig. 3 shows the structural schematic diagram of stationary vane assembly according to an embodiment of the invention；

Fig. 4 shows the structural schematic diagram of stationary vane assembly according to another embodiment of the invention；

Fig. 5 shows the lateral structure schematic diagram of stationary vane assembly according to an embodiment of the invention.

Wherein, corresponding relationship of the Fig. 1 into Fig. 5 between appended drawing reference and component names are as follows:

10 centrifugal blowers, 102 fan shrouds, 104 movable vane wheels, 106 stationary vane assemblies, 1062 wheel discs, 1064 diffusion blades, 1066 Return channel blade, 1068 support rings, 108 wind loops.

Specific embodiment

To better understand the objects, features and advantages of the present invention, with reference to the accompanying drawing and specific real Applying mode, the present invention is further described in detail.It should be noted that in the absence of conflict, the implementation of the application Feature in example and embodiment can be combined with each other.

In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, the present invention may be used also To be implemented using other than the one described here other modes, therefore, protection scope of the present invention is not by described below Specific embodiment limitation.

Referring to the centrifugal blower of Fig. 1 to Fig. 5 description according to some embodiments of the invention.

As shown in Figures 1 and 2, the centrifugal blower 10 of embodiment according to the present invention, comprising: fan shroud 102, fan shroud 102 are provided with air inlet；Movable vane wheel 104 is set in fan shroud 102, and is arranged close to air inlet；Stationary vane assembly 106, setting In in fan shroud 102, and it is set to the downstream of movable vane wheel 104, stationary vane assembly 106 includes vane diffuser, vane diffuser packet The multiple diffusion blades 1064 for including wheel disc 1062 and being set on wheel disc 1062, multiple diffusion blades 1064 are along wheel disc 1062 On the circumferentially-spaced lateral wall for being distributed in wheel disc 1062, diffusion blade 1064 can along the axially extending of wheel disc 1062, with wind Axial diffusion channel is limited between the inner sidewall of hood 102.

In this embodiment, stationary vane assembly 106 includes vane diffuser, by circumferentially setting on the lateral wall of wheel disc 1062 Multiple diffusion blades 1064 are set, vane diffuser structure is set as axial blade diffuser, axial blade diffuser and existing skill Radial blade diffuser in art is compared, on the one hand, in the household appliance for being provided with the centrifugal blower 10, for example dust catcher is interior When portion space is limited, replaced using the axial blade diffuser for laying diffusion blade 1064 on side wall in the end face of wheel disc 1062 Upper laying diffusion blade 1064, can increase the distance between movable vane wheel 104 and static pressure component, in conjunction with the diffusion axially extended Blade 1064, realize to the air-flow as derived from movable vane wheel 104 realize diffusion effect, and then reduce flow velocity, improve static pressure, with The operational efficiency of complete machine is improved under the premise of not increasing radial dimension, on the other hand, diffusion blade 1064 can axially extend, So as to axial diffusion channel be formed between diffusion blade 1064 and the inner sidewall of fan shroud 102, in conjunction with movable vane wheel 104 and static pressure The distance between component increases, and air-flow is advanced between movable vane wheel 104 and static pressure component before entering axial blade diffuser The a degree of mixing diffusion of row can further decrease flow velocity, promote the uniformity of air-flow in conjunction with axial diffusion channel, And then reduce the operation noise of centrifugal blower 10.

Specifically, so-called radial diffusion blade 1064, to be arranged on the end face of wheel disc 1062, and radially extends Blade, and form the axial diffusion blade 1064 of axial blade diffuser, then for be arranged in wheel disc 1062 circumference side On wall, and the blade axially extended, compared with radial diffusion blade 1064, axial 1064 one side of diffusion blade can Increase the distance between movable vane wheel 104 and wheel disc 1062, on the other hand also can reduce the radial dimension of wheel disc 1062, to have Conducive to the overall dimensions for reducing the dust catcher that the centrifugal blower 10 is arranged.

As shown in figure 4, in the above-described embodiments, optionally, stationary vane assembly 106 further include: return channel is set to blade expansion The return channel in depressor downstream, return channel include the multiple return channel leaves being set to back on the end face of the wheel disc 1062 of air inlet Piece 1066, multiple return channel blades 1066 are arranged along the axially spaced-apart of wheel disc 1062, and return channel blade 1066 can be to wheel disc 1062 center extends, wherein return channel is an integral molding structure with vane diffuser.

In this embodiment, by the way that return channel is arranged, return channel includes the wheel disc 1062 being set to back on air inlet Multiple return channel blades 1066 on end face, return channel blade 1066 can extend to the center of wheel disc 1062, thus make by The air-flow of diffusion blade 1064 along return channel blade 1066 to central backflow, and then be conducive to promoted anode operational efficiency.

As shown in figure 3, in any of the above-described embodiment, optionally, stationary vane assembly 106 further include: support ring 1068, setting In the periphery of vane diffuser, and it can cooperate with the inner sidewall of fan shroud 102 and assemble, support ring 1068 is used to support blade expansion Depressor limits axial diffusion channel, wherein support ring 1068 between diffusion blade 1064 and the inner sidewall of support ring 1068 Be provided with buckle in one in fan shroud 102 circumferential edge, another the week in support ring 1068 and fan shroud 102 Be provided on edge can with the buckle slot for the assembling that is clasped, to carry out circumferential limit to support ring 1068.

In this embodiment, by the way that support ring 1068 is arranged between vane diffuser and fan shroud 102, on the one hand, can To be supported by the diffusion blade 1064 of 1068 pairs of axial directions of support ring, and then the stability of vane diffuser is promoted, it is another Aspect is realizing support ring by the way that mutually matched buckle and card slot is respectively set in support ring 1068 and fan shroud 102 1068 it is circumferentially positioned while, realize the assembly assembling between support ring 1068 and fan shroud 102, and advantageously reduce preparation Cost.

Specifically, the radial diffusion blade 1064 of stationary vane assembly 106 is changed to axial diffusion blade 1064, axial leaf Piece diffuser and the preparation of return channel blade 1066 and wheel disc 1062 (i.e. return channel ontology) integrated formed structure, axial diffusion The upstream of return channel blade 1066 is arranged in blade 1064, and a circle support ring 1068 is provided on the outside of axial blade diffuser, Support ring 1068 is for providing fitting surface and buckle slot to install fan shroud 102, the outlet outflow of air-flow driven impeller 104 Afterwards, by vaneless diffuser, then flow direction is become axially from radial under the action of fan shroud 102, circumferential by setting Vane diffuser, the axial direction part before entering return channel, air-flow realize the guidance to air-flow by axial diffusion channel Diffusion.

In one embodiment of the application, as shown in figure 5, diffusion blade 1064 is circumferentially obliquely installed, diffusion blade 1064 inlet angle φ 1 circumferentially is greater than or equal to 10 °, and is less than or equal to 40 °.

In this embodiment, diffusion blade 1064 is also circumferentially obliquely installed while axially extending, and will be in upper The endpoint of the diffusion blade 1064 of trip is determined as blade inlet edge, and the endpoint of the diffusion blade 1064 in downstream is determined as blade Angle between blade inlet edge and the front end face of wheel disc 1062 is determined as inlet angle φ 1 by rear, by limiting inlet angle φ 1 Range, on the one hand, be able to extend the length range in diffusion channel, on the other hand, be conducive to promoted diffusion effect, with realize expand Pressure is slowed down.

In one embodiment of the application, as shown in figure 5, the inlet angle φ 1 of diffusion blade 1064 circumferentially be greater than or Equal to 20 °, and it is less than or equal to 25 °.

In this embodiment, by further decreasing the restriction range of inlet angle φ 1, on the one hand, can further be promoted On the other hand diffusion effect can reduce the difficulty of preparation.

In one embodiment of the application, as shown in figure 5, the angle of outlet φ 2 and entrance of diffusion blade 1064 circumferentially Differential seat angle between angle φ 1 is greater than or equal to 10 °, and is less than or equal to 50 °.

In this embodiment, the angle between trailing edge and the end face of wheel disc 1062 is determined as angle of outlet φ 2, passed through The angle difference between the angle of outlet φ 1 and angle of outlet φ 2 of diffusion blade 1064 is limited, to limit the leaf of diffusion blade 1064 Piece camber, and further determine that the angle of outlet φ 2 of diffusion blade 1064, while obtaining optimal diffusion effect, reduction is made an uproar Sound.

In one embodiment of the application, as shown in figure 5, the angle of outlet φ 2 and entrance of diffusion blade 1064 circumferentially Differential seat angle between angle φ 1 is greater than or equal to 15 °, and is less than or equal to 25 °.

In this embodiment, by further limiting the angular range of differential seat angle, to advanced optimize diffusion reduction of speed effect, And then the operational efficiency of centrifugal blower 10 is improved to the maximum extent.

Specifically, when the inlet angle of diffusion blade 1064 is 20 °, the angle of outlet can be between 35 ° and 45 °, in diffusion When the inlet angle of blade 1064 is 25 °, the angle of outlet can be between 40 ° and 50 °.

In one embodiment of the application, the quantity of multiple diffusion blades 1064 is greater than or equal to 10, and be less than or Equal to 35；Wherein, multiple diffusion blades 1064 are wing blades or straight blade.

In this embodiment, diffusion blade 1064 can be set as wing blades or straight blade with structure, wherein airfoil type The shape design of the cross section of blade is the similar streamlined structure with aircraft wing by blade, advantageous using wing blades In reduction gas-flow resistance, and then be conducive to be promoted the operational efficiency of centrifugal blower 10, and straight blade is used to meet axially While diffusion demand, preparation cost is lower.

In addition, by the quantity for limiting diffusion blade 1064, to combine vane diffuser diffusion action and preparation Demand, wherein when the quantity of diffusion blade 1064 is 10, preparation process is simpler, is in the quantity of diffusion blade 1064 At 35, the effect of diffusion reduction of speed is more preferable.

As shown in Figures 1 and 2, in any of the above-described embodiment, optionally, further includes: wind loop 108 is set to stator blade The downstream of component 106, and can cooperate with support ring 1068 and dock assembling；Motor is set to the downstream of wind loop 108, and energy Enough it is connected to movable vane wheel 104.

In this embodiment, by the way that wind loop 108 is arranged, windproof effect is realized.

The dust catcher of embodiment according to the present invention, including centrifugal blower described in any of the above-described embodiment.

In the present invention, term " first ", " second ", " third " are only used for the purpose of description, and should not be understood as indicating Or imply relative importance；Term " multiple " then refers to two or more, unless otherwise restricted clearly.Term " installation ", The terms such as " connected ", " connection ", " fixation " shall be understood in a broad sense, for example, " connection " may be a fixed connection, being also possible to can Dismantling connection, or be integrally connected；" connected " can be directly connected, can also be indirectly connected through an intermediary.For this For the those of ordinary skill in field, the specific meanings of the above terms in the present invention can be understood according to specific conditions.