CN101608632A - Electric blower and carried the electric dust collector of electric blower - Google Patents
Electric blower and carried the electric dust collector of electric blower Download PDFInfo
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- CN101608632A CN101608632A CNA2009101424363A CN200910142436A CN101608632A CN 101608632 A CN101608632 A CN 101608632A CN A2009101424363 A CNA2009101424363 A CN A2009101424363A CN 200910142436 A CN200910142436 A CN 200910142436A CN 101608632 A CN101608632 A CN 101608632A
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Abstract
The improved efficiency of blower and noise reduce and have the compromise selection relation, are difficult to make it and deposit.So, the purpose of this invention is to provide a kind of electric dust collector that makes high efficiency and low noise and the electric blower of depositing and possess this electric blower.In blower, utilize on the outermost path position of diffuser vane of adjacency and the diffuser stator blade face in rotating center and the fan guard area surrounded through hole is set, the blade sound that makes domination blower noise is interfered at the surface on blade face and the back side and is reduced, and utilize boundary layer control by through hole, air-flow in the diffuser is carried out rectification, thereby improve efficient.
Description
Technical field
The present invention relates to electric blower and carried the electric dust collector of electric blower, relate in particular to the through hole on the outer circumferential side diffuser blade face that is located at blower.
Background technique
There is inhalation power big and noise is little as important demand to electric dust collector.
To strengthen inhalation power with the condition of certain consumption electric power, need to improve the efficient of electric dust collector, reduce quietization that also requires on the noise as the electric blower of source of sound.At this, blower possesses the rotating centrifugal impeller as movable vane that utilizes motor directly to drive, as the diffuser and the backflow guider of stator blade.At present, the feature that is used for the electric blower of electric dust collector is to have adopted the self cooling mode of utilizing the air-flow cool motors that is produced by blower self.
Measure as the efficient that is used to improve blower, effective method is to improve the rotating speed of centrifugal impeller and make external diameter become small-sized and relatively reduce the plectane frictional loss, perhaps reduce the gap of movable vane and stator blade and reduce in the fluid friction at this position, gap loss, the shape that perhaps is more typically movable vane, stator blade is made as the best and makes fluid loss become minimum.But,, then need to be reduced in the loss at sound leaf position in addition if carry out these measures.For example, as described in patent documentation 1 (TOHKEMY 2006-132369 communique), implement following measure, in the fan guard that covers electric blower, in the position that is equivalent to the diffuser peripheral part hole is set, thereby a part of air-flow is bled off to the outside, and the flow that reduces by backflow guider and motor coolant flow channel reduces fluid loss.
As the measure that is used to improve noise, following technological scheme is arranged, as described in patent documentation 2 (No. the 3510107th, Japan's special permission), by outside diameter through hole is set at diffuser vane, the surface side of blade is connected with back side, the sound wave of propagating in the vane channel of adjacency is interfered, thereby reduce noise, especially sound and reduce noise by sharp-pointed blade sound.
Yet, the above-mentioned a series of measure that is used to raise the efficiency is owing to increase the flow velocity of blower inside respectively, increase the aerodynamic force interfering edge between the sound leaf of the source of sound become blade sound, noise is emitted to the outside from covering directly, so the result is the noise of electric dust collector that has increased the electric blower of electric blower and lift-launch.And, on fan guard, be provided with in the mode that the hole bleeds off air-flow, owing to be used for the deficiency in draught of cool motors, therefore also appended the danger that the reliability of electric blower reduces.
On the other hand, at the diffuser outside diameter measure of through hole is set what be used for reducing noise, though can suppress blade sound, the leakage current on the through hole hinders the deceleration of the main flow that flows in diffuser inside, thereby has reduced blower efficiency.
Like this, improved efficiency and noise reduction have the compromise selection relation, are difficult in the prior art make it and deposit.
Summary of the invention
The objective of the invention is to address the above problem, a kind of improved efficiency of blower and electric blower that blade sound reduces and electric dust collector that possesses this electric blower realized is provided.
In order to achieve the above object, the invention is characterized in that electric blower has: motor; Centrifugal impeller with the direct-connected air-flow generation of the running shaft of above-mentioned motor usefulness; Have at the outer circumferential side of above-mentioned centrifugal impeller with a plurality of stator blades of tilted radiation shape configuration roughly, and the diffuser that the air flow divert of above-mentioned generation is flowed out; The backflow guider that will guide to above-mentioned motor from the air-flow that above-mentioned diffuser flows out; The dividing plate that separates above-mentioned diffuser and above-mentioned backflow guider; And in load onto the housing of stating motor, above-mentioned centrifugal impeller, above-mentioned diffuser, backflow guider and dividing plate, under the state of the above-mentioned diffuser of end on observation of above-mentioned running shaft, on by the above-mentioned diffuser stator blade face in the scope of the straight line of the outermost path position of the above-mentioned diffuser vane that connects adjacency and above-mentioned rotating shaft center and the encirclement of above-mentioned housing, form a through hole at least.
The present invention has following effect.
According to the present invention, can provide electric blower that the improved efficiency of having realized blower and blade sound reduces and the electric dust collector that possesses this electric blower.
Description of drawings
Fig. 1 is the sectional elevation of the pattern of main body of dust collector.
Fig. 2 is the sectional view of vacuum cleaner with electric blower.
Fig. 3 is that diffuser and backflow guider are the static runner of split.
Fig. 4 is that diffuser and backflow guider are the static runner of one.
Fig. 5 is the embodiments of the present invention examples.
Fig. 6 is the stereogram of embodiments of the present invention example.
Fig. 7 is the ideograph of air-flow between the blade of diffuser.
Fig. 8 is the result of airflow analysis of the effect of expression present embodiment.
Fig. 9 is the experimental result of the effect of expression present embodiment.
Among the figure:
The 106-electric blower, 203-housing, 210-impeller, 211,300, the 400-diffuser, 212, the 606-dividing plate, 213,405-backflow guider (リ one Application ガ イ De), the 214-fan guard, 217-hub side, 218-pipe box side, 301,401,508, the 601-diffuser vane, 302, the 402-convex side, 303, the 403-concave side, the overlapping portion of 305-, the half-open portion of 306-outlet side, 307, the 605-quarter window, 406-outlet side curved part, the 501-rotating center, 503-outermost path position, the 504-through hole is provided with scope, 505-diffuser exit region, 506,602, the 804-through hole, 507-through hole angle, 603-through hole height, 604-diffuser height.
Embodiment
Embodiments of the invention shown below are following electric blowers, and this electric blower has: motor; Centrifugal impeller with the direct-connected air-flow generation of the running shaft of above-mentioned motor usefulness; Have at the outer circumferential side of above-mentioned centrifugal impeller with a plurality of stator blades of tilted radiation shape configuration roughly, and the diffuser that the air flow divert of above-mentioned generation is flowed out; The backflow guider that will guide to above-mentioned motor from the air-flow that above-mentioned diffuser flows out; The dividing plate that separates above-mentioned diffuser and above-mentioned backflow guider; And in load onto the housing of stating motor, above-mentioned centrifugal impeller, above-mentioned diffuser, backflow guider and dividing plate, it is characterized in that, under the state of the above-mentioned diffuser of end on observation of above-mentioned running shaft, on by the above-mentioned diffuser stator blade face in the scope of the straight line of the outermost path position of the above-mentioned diffuser vane that connects adjacency and above-mentioned rotating shaft center and the encirclement of above-mentioned housing, form a through hole at least.
In said structure, the zone of convex side that the blade be connected to each other the boundary layer expansion is set on diffuser with the boundary layer thin and main flow near and the through hole in the zone of the concave side of mobile blade.The pressure ratio concave side of convex side is also high, so produce leakage current to concave side from convex side, and become the boundary layer of sucking-off convex side and to the result of the main flow side of concave surface ejection, generation will be partial to the main flow that flows and be turned to and make it in the mobile effect of runner middle body before that this moment.According to this effect, can realize effectively using the deceleration of vane channel width, pressure recovery is improved, and blower efficiency improves.
At this moment, the reduction effect of blade sound is owing to can guarantee that when as patent documentation 1 through hole being set improved efficiency and blade sound that therefore can and deposit blower reduce.And, by this electric blower is carried on electric dust collector, can not reduce reliability, and can realize the reinforcement of inhalation power and the reduction of noise.
Below, use the description of drawings embodiments of the invention.
Embodiment 1
Fig. 1 represents the sectional elevation of the main body of dust collector of pattern.In Fig. 1, the air-flow in the main body of dust collector 100 is described.On main body of dust collector 100, be connected hose coupling 101 in mode with the dust precipitation chamber connection.Enter dust precipitation chamber 102 from hose coupling 101 leaked-in airs.In Fig. 1, represented paper bag 103, and the raw material of bag are not limit as collecting unit of dust.And, in the occasion of the cyclone mode of having utilized centrifugation, replace paper bag 103 to collect by cyclonic chamber.The air of having removed most of dust with paper bag 103 passes through filter part 104 again, and also removes trickle dust at this.Then, air-flow flows into motor chamber 105.Electric blower 106 is arranged in the motor chamber 105 by vibration-proof rubber 107 suspensions,, discharges from blower export 109 after boosting from blower inlet 108 leaked-in airs.The 110th, the control circuit of control electric blower 106.
Then, use Fig. 2 that electric blower 106 is described.Fig. 2 is the longitudinal section of electric blower 106.Electric blower 106 is made of blower 201 and motor 202.
Motor 202 is supported with running shaft 205 by the housing 203 of an end opening and be configured on the motor casing that the end breaket 204 on the opening of housing 203 constitutes.Rotor 206 is installed on running shaft 205.Periphery configuration stator 207 at rotor 206.Transducer 209 transmission that utilize brush 208 and contact therewith to the supply of the electricity of rotor 206.
Blower 201 has held in fan guard 214 and above-mentioned running shaft 205 direct-connected impellers 210, the diffuser 211 of outer circumferential side that is located at impeller 210 and relative above-mentioned diffuser 211 is configured in the opposite across dividing plate 212 backflow guider 213.Diffuser 211 is made of a plurality of diffuser vanes (diffuser vane 301,401,508,601 described later), and diffuser vane is located at the front face side of dividing plate 212.Backflow guider 213 is made of a plurality of backflow stator blades (not shown), and the backflow stator blade is located at the back side of dividing plate 212.Impeller 210 roughly contacts with the sealed member 215 that is located at fan guard 214 sides, has to prevent the structure that leaks.
The air that has passed through electric blower inlet 216 boosts and speedup with impeller 210.Then, the air-flow that has passed through diffuser 211 roughly turns to 180 °, and flows into to backflow guider 213, and air-flow slows down in this process, and pressure rises thus.The air-flow that has passed through backflow guider 213 flows in the motor casing 203, discharges after cooled rotor 206, stator 207, brush 208, transducer 209 etc.
At this, in the occasion of observing diffuser 211 from axially (direction parallel with running shaft 205) of running shaft 205, being defined as dividing plate 212 sides is hub side 217, and electric blower 216 sides that enter the mouth are sleeve pipe side 218.
Fig. 3 is the diffuser 211 as the object of present embodiment, is axially to be that electric blower 216 sides that enter the mouth are observed the figure of diffuser 211 from running shaft 205.Because the equal reason of the number of blade of diffuser 211 and backflow guider 213, the blade of having represented diffuser and backflow guider are the situation of diffuser 300 of the structure of split.The posterior border position of diffuser vane 301 is near fan guard 304.Between the rear edge and fan guard 304 of diffuser vane 301, be formed with quarter window 307 to the general triangular of the medial cuts of diffuser 211.The wind that flows out between the diffuser vane 301 turns to Vertical direction by quarter window 307, and flows to backflow guider one side.
At this, in diffuser vane 301, define convex side 302 and concave side 303 as shown in the figure, among vane channel, the zone definitions of being surrounded by the blade of adjacency is overlapping 305, will be half-open 306 of outlet side with the right outlet side zone definitions of the blade face of a side only.
Fig. 4 is the figure of expression from the diffuser 400 of other structures of the present embodiment of the viewpoint observation identical with Fig. 3.In Fig. 4, represented that diffuser 211 has the identical number of blade with backflow guider 213 and becomes one and the situation of the structure that connects.Diffuser vane 401 becomes backflow guider 504 in outlet side curved part 406 bendings nearby of fan guard 404.In this structure, it is characterized in that the blade that diffuser and backflow guider become one.
Then, use Fig. 5 that embodiments of the invention are described.Fig. 5 is in the diffuser of Fig. 3 or Fig. 4, is the figure that position common expression be set of explanation as the through hole of the feature of present embodiment.Especially illustrate the diffuser structure of Fig. 4 in the present embodiment, and also be identical in Fig. 3.In the axial projection drawing of rotation as shown in Figure 5, obtain diffuser vane 508 near the outermost path position 503 of fan guard 502, should be connected with rotating center 501 by point with straight line then.Thus, can define the diffuser exit region 505 that straight line that utilization defines and diffuser vane, fan guard 502 surround between two blades of adjacency.This diffuser exit region 505 roughly is equivalent to be defined as the part of half-open 306 of outlet side in Fig. 3, even in the occasion that can not clearly define the half-open portion of outlet side that diffuser and backflow guider as shown in Figure 4 become one, exit region that also can specific diffuser.
In the present embodiment, it is characterized in that the through hole on the diffuser blade face that is positioned at this diffuser exit region 505 is provided with arbitrary position of scope 504, more than one through hole 506 is set at least.At this, through hole 506 then need not all to be comprised if its part is provided with scope 504 with through hole and intersects at least.And this definition method illustrates with the occasion of the diffuser structure of Fig. 4, and also is identical in the diffuser structure of Fig. 3.
For the position of through hole 506 and shape etc. can be arbitrarily, and uses especially effectively embodiment of Fig. 6 explanation.Fig. 6 represents to possess the stereogram of the diffuser of through hole 602.In the export department of diffuser vane 601, the through hole 602 of incision-like is set in the position of air-flow before quarter window 605 turns to.This through hole 602 is edge-on from dividing plate 606 1, and opens to midway to the blades height direction.
Then use Fig. 7 and Fig. 8 that effect of the present invention is described.Fig. 7, Fig. 8 utilize isohypse to represent the result's of the velocity flow profile on analysis hub side section (a), central section (b), the sleeve pipe side section (c) figure to occasion that through hole is not set, the blade height direction of diffuser of occasion that is provided with through hole respectively.These section (a) and (b), (c) correspond respectively to hub side section 607, central section 608, the sleeve pipe side section 609 of Fig. 6.
As can be seen from Figure 7, irrelevant with the height and position of diffuser vane, the concave side of main flow deflection blade flows, and on the contrary in the expansion of convex side boundary layer, becomes the air-flow of low speed.Hence one can see that, do not realize that effective runner enlarges, and pressure recovery is not fully carried out.
On the other hand, in the occasion that is provided with through hole shown in Figure 8, owing to produce leakage current from the convex side of blade to concave side by through hole 804, therefore there is the wheel hub surface side (a) of through hole, the boundary layer of the low speed of seeing among Fig. 7 is to opposition side (concave side) sucking-off of blade, and the air-flow by sucking-off, the directional steering on a main flow direction figure left side.The air-flow of central authorities' section and sleeve pipe side also is not so good as the air-flow of hub side, but with this influence that is turned in proper order.According to the effect of this boundary layer control, main flow can flow near the central authorities of vane channel fifty-fifty, can realize the efficient pressure recovery.Especially, as shown in Figure 3, separate with the backflow guider at diffuser, and quarter window is present in occasion therebetween, the convex side of blade is opened quarter window widelyer, thus make the hub side air flow divert in this broad zone, thus have the effect that realizes smooth crooked air-flow.
The through hole 602 of Fig. 6 is opened and is being flowed into curved part (quarter window) before, and utilization is by the air-flow of through hole 602, flow into inlet side (convex side) because of attraction force become than around also low negative pressure, air-flow is pulled to a side and the crooked effect of this through hole between blade so have, so also has the effect of support to the crooked air-flow of backflow guider connection.
The realization of the crooked air-flow of the expansion that turns to caused effective expansion Flow area of the three-dimensional by the main flow that flows in diffuser and the smoothness from diffuser to the backflow guider can improve blower efficiency like this.
In addition, for noise, especially blade sound, shown in patent documentation 2, can make by interlobate sound wave to die down in the interference of the both sides of blade, so noise reduces by through hole.The structure-irrelevant of this and Fig. 3 and Fig. 4 can be predicted the reduction effect.
According to above mechanical device, can solve the reduction of the improved efficiency and the blade sound of electric blower simultaneously.And, by this electric blower is carried on electric dust collector, can provide the electric dust collector that inhalation power is strong and harsh noise is little.In an embodiment of the present invention, the problem to the cooling air deficiency of motor that does not exist in known example also is a feature.
With regard to present embodiment, by considering above-mentioned mechanical device, following restriction condition is set especially, can expect better effect, this confirms by experiment.That is preferably below 1/2 of diffuser height 604 (H), i.e. h≤H/2 of the height 603 (h) of through hole shown in Figure 6.These height are measured in the diametrical position of opening through hole.And, though in Fig. 6 through hole be shaped as rectangular, be not limited thereto other shapes such as also trapezoidal, circle.In addition, in Fig. 5, when the differential seat angle with the center line of tangent line on the through hole of diffuser vane 508 and through hole 506 is defined as through hole angle 507 (θ), 0 °≤θ≤45 ° preferably.This is because by being set at this angle, become smooth by the leakage current of through hole and the interflow of main flow.
Fig. 9 has represented with experimental verification result's the example of the variation of the efficient of the electric blower that causes according to having or not of through hole and noise.At this, the following formula definition of so-called electric blower efficient.
Electric blower efficiency eta=output power/input power
Output power=ρ gQH
(ρ: density, g: gravity accleration, Q: air quantity, H: pressure)
Compared (1) in the occasion that through hole is not set and (2) with through hole from 1/2 the height of hub side with blade, and the monomer performance of the electric blower of the occasion that is provided with the slope of θ=45 °.By through hole is set, electric blower efficient approximately improves 0.6% in individual air quantity zone.And with regard to noise, the blade sound that especially becomes sharp-pointed sound has approximately reduced 15dB.According to this embodiment, can finish that the improvement of blower efficiency and noise (especially becoming the blade sound of sharp-pointed sound) reduce and deposit.
Claims (5)
1. an electric blower has: motor; Centrifugal impeller with the direct-connected air-flow generation of the running shaft of above-mentioned motor usefulness; Have at the outer circumferential side of above-mentioned centrifugal impeller with a plurality of stator blades of tilted radiation shape configuration roughly, and with the air flow divert of above-mentioned generation and the diffuser that flows out; The backflow guider that will guide to above-mentioned motor from the air-flow that above-mentioned diffuser flows out; The dividing plate that separates above-mentioned diffuser and above-mentioned backflow guider; And in load onto the housing of stating motor, above-mentioned centrifugal impeller, above-mentioned diffuser, backflow guider and dividing plate, it is characterized in that,
Under the state of the above-mentioned diffuser of end on observation of above-mentioned running shaft, on the above-mentioned diffuser stator blade face in the scope of the straight line of the outermost path position of the above-mentioned diffuser vane that utilize to connect adjacency and above-mentioned rotating shaft center and the encirclement of above-mentioned housing, form a through hole at least.
2. electric blower according to claim 1 is characterized in that,
Above-mentioned through hole is all for the blade height of the locational above-mentioned diffuser of offering this through hole, is provided with by the aforementioned barriers side.
3. electric blower according to claim 2 is characterized in that,
Above-mentioned through hole is half following height with respect to the blade height of the locational above-mentioned diffuser of offering this through hole.
4. according to claim 2 or 3 described electric blowers, it is characterized in that,
Above-mentioned through hole is arranged to from the occasion of running shaft direction observation, is tilted towards the direction that concave side becomes from the path side to big footpath side to convex side from above-mentioned diffuser stator blade.
5. an electric dust collector possesses main body of dust collector with dust precipitation chamber and electric blower and the hose coupling that is connected with this main body of dust collector, it is characterized in that,
Above-mentioned electric blower has: motor; Centrifugal impeller with the direct-connected air-flow generation of the running shaft of above-mentioned motor usefulness; Have at the outer circumferential side of above-mentioned centrifugal impeller with a plurality of stator blades of tilted radiation shape configuration roughly, and with the air flow divert of above-mentioned generation and the diffuser that flows out; The backflow guider that will guide to above-mentioned motor from the air-flow that above-mentioned diffuser flows out; The dividing plate that separates above-mentioned diffuser and above-mentioned backflow guider; And in load onto the housing of stating motor, above-mentioned centrifugal impeller, above-mentioned diffuser, backflow guider and dividing plate,
Under the state of the above-mentioned diffuser of end on observation of above-mentioned running shaft, on the above-mentioned diffuser stator blade face in the scope of the straight line of the outermost path position of the above-mentioned diffuser vane that utilize to connect adjacency and above-mentioned rotating shaft center and the encirclement of above-mentioned housing, form a through hole at least.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008157335 | 2008-06-17 | ||
| JP2008157335A JP2009299635A (en) | 2008-06-17 | 2008-06-17 | Electric blower and vacuum cleaner equipped with the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101608632A true CN101608632A (en) | 2009-12-23 |
Family
ID=41482507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009101424363A Pending CN101608632A (en) | 2008-06-17 | 2009-06-16 | Electric blower and carried the electric dust collector of electric blower |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2009299635A (en) |
| CN (1) | CN101608632A (en) |
| TW (1) | TW201002945A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101608631B (en) * | 2008-06-17 | 2012-02-08 | 日立空调·家用电器株式会社 | Electric blower and electric duct collector equipped with the same |
| CN103181741A (en) * | 2011-12-31 | 2013-07-03 | 乐金电子(天津)电器有限公司 | Efficient cyclone separation device for dust remover |
| CN103889295A (en) * | 2011-10-13 | 2014-06-25 | 伊莱克斯公司 | Vacuum cleaner |
| CN107524636A (en) * | 2017-08-22 | 2017-12-29 | 珠海格力电器股份有限公司 | Wind-guiding structure and fan |
| WO2019011315A1 (en) * | 2017-07-14 | 2019-01-17 | 美的集团股份有限公司 | Centrifugal vane wheel and centrifugal fan comprising same and dust collector |
| CN109253109A (en) * | 2017-07-14 | 2019-01-22 | 美的集团股份有限公司 | Centrifugal impeller and centrifugal blower, dust catcher with it |
| CN109843134A (en) * | 2016-10-12 | 2019-06-04 | 阿尔弗雷德·卡赫欧洲两合公司 | Cleaning equipment and method for manufacturing cleaning equipment |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6446138B2 (en) * | 2015-08-26 | 2018-12-26 | 株式会社日立製作所 | Vane diffuser and blower or fluid machine or electric blower equipped with the diffuser |
| WO2019176625A1 (en) * | 2018-03-13 | 2019-09-19 | パナソニックＩｐマネジメント株式会社 | Electric blower, electric cleaner, and air towel |
| JP7516193B2 (en) * | 2020-09-30 | 2024-07-16 | 日立グローバルライフソリューションズ株式会社 | Blower and washing machine equipped with same |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5771798A (en) * | 1980-10-18 | 1982-05-04 | Hori Tekkosho Kk | Trimming die cutter |
| JP3510107B2 (en) * | 1998-06-08 | 2004-03-22 | 株式会社日立製作所 | Electric blower and vacuum cleaner equipped with the same |
-
2008
- 2008-06-17 JP JP2008157335A patent/JP2009299635A/en active Pending
-
2009
- 2009-06-02 TW TW98118212A patent/TW201002945A/en unknown
- 2009-06-16 CN CNA2009101424363A patent/CN101608632A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101608631B (en) * | 2008-06-17 | 2012-02-08 | 日立空调·家用电器株式会社 | Electric blower and electric duct collector equipped with the same |
| CN103889295A (en) * | 2011-10-13 | 2014-06-25 | 伊莱克斯公司 | Vacuum cleaner |
| CN103889295B (en) * | 2011-10-13 | 2016-11-23 | 伊莱克斯公司 | Vacuum cleaner |
| CN103181741A (en) * | 2011-12-31 | 2013-07-03 | 乐金电子(天津)电器有限公司 | Efficient cyclone separation device for dust remover |
| CN103181741B (en) * | 2011-12-31 | 2017-04-05 | 南京乐金熊猫电器有限公司 | The efficient cyclone segregation apparatuss of vacuum cleaner |
| CN109843134A (en) * | 2016-10-12 | 2019-06-04 | 阿尔弗雷德·卡赫欧洲两合公司 | Cleaning equipment and method for manufacturing cleaning equipment |
| WO2019011315A1 (en) * | 2017-07-14 | 2019-01-17 | 美的集团股份有限公司 | Centrifugal vane wheel and centrifugal fan comprising same and dust collector |
| CN109253109A (en) * | 2017-07-14 | 2019-01-22 | 美的集团股份有限公司 | Centrifugal impeller and centrifugal blower, dust catcher with it |
| CN109253109B (en) * | 2017-07-14 | 2024-07-12 | 美的集团股份有限公司 | Centrifugal impeller and centrifugal fan and dust collector with same |
| CN107524636A (en) * | 2017-08-22 | 2017-12-29 | 珠海格力电器股份有限公司 | Wind-guiding structure and fan |
| WO2019037526A1 (en) * | 2017-08-22 | 2019-02-28 | 格力电器（武汉）有限公司 | Air guide structure and fan |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201002945A (en) | 2010-01-16 |
| JP2009299635A (en) | 2009-12-24 |
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Open date: 20091223 |