CN1727697A - Centrifugal fan of vacuum cleaner - Google Patents
Centrifugal fan of vacuum cleaner Download PDFInfo
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- CN1727697A CN1727697A CN 200410020130 CN200410020130A CN1727697A CN 1727697 A CN1727697 A CN 1727697A CN 200410020130 CN200410020130 CN 200410020130 CN 200410020130 A CN200410020130 A CN 200410020130A CN 1727697 A CN1727697 A CN 1727697A
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- aileron
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Abstract
The present invention relates to a centrifugal fan of vacuum dust-collecting device. It includes blade wheel and diffuser. Said blade wheel is driven by motor and can be rotated to make air be flowed, the outside of said blade wheel is surrounded with diffuser, said diffuser has several wings which can convert a portion of energy of motion of blade wheel into pressure potential energy. It is characterized by that said diffuser has pressure-reducing component which can reduce pressure centralized in front end portion of wing, so that it can reduce noise.
Description
Technical field
The present invention relates to a kind of vacuum dust collector centrifugal fan.
Background technique
Fig. 1, shown in Figure 2, existing vacuum cleaner comprise cleaner head 1, joint 2 and main body 3.Cleaner head 1 is used to suck the foreign matters such as dust on ground.Joint 2 is used for the foreign matter that water conservancy diversion sucks by cleaner head 1.Main body 3 is filtered the foreign matter that blows into by joint 2, and the air after filtering is discharged.
Above-mentioned joint 2 comprises extension tube 2a, handle portion 2b, pipeline 2c.Extension tube 2a is connected with above-mentioned cleaner head 1.Handle portion 2b is connected with above-mentioned extension tube 2a, is provided with the control device 2d of control aforementioned body 3.Pipeline 2c connects above-mentioned handle portion 2b and aforementioned body 3.
The end 2e of above-mentioned pipeline 2c is inserted in a side 3e of main body 3, installs, and foreign matter is sucked main body 3 inside.Aforementioned body 3 comprises collection bag 3a, centrifugal blower 4.Collection bag 3a is used to filter the foreign matter that blows into by above-mentioned pipeline 2c.Centrifugal blower 4 produces suction, allows air flow to collection bag 3a from cleaner head 1, makes deposition of foreign material at above-mentioned collection bag 3a.
As shown in Figure 3, above-mentioned centrifugal blower 4 comprises housing 9, impeller 10, diffuser 20, motor 8.Comprise cover 5 in the housing 9, cover 5 is formed with suction port 5a, and suction port 5a is used for sucking by collection bag 3a filtered air.Impeller 10 allows the air-flow direction that flows to by suction port 5a by 90 ° of changes, allows air flow by circumferencial direction, and improves the energy of flow of air.Diffuser 20 is being encircled the outside of above-mentioned impeller 10, and the air flows energy being improved by impeller 10 converts pressure potential to.Motor 8 rotates above-mentioned impeller 10.
To shown in Figure 6, existing impeller 10 is arranged on the inboard of cover 5 as Fig. 4, and is communicated with the suction port 5a of cover 5.
Above-mentioned impeller 10 comprises chassis 14, a plurality of blade 16, takes over a business 12.Chassis 14 has the shape of disk, and is fixed on the rotating shaft 8a of motor 8, is rotated under the effect of motor 8.A plurality of blades 16 are installed in above-mentioned chassis 14, and the circumferencial direction that allows air press impeller 10 flows.Take over a business 12 and be formed with suction eye 12b, suction eye 12b is communicated with above-mentioned cover suction port 5a.Take over a business 12 with the combinations of states of above-mentioned chassis 14 symmetries upside at blade 16, be fixed.
Above-mentioned blade 16 has the curved shape as arc, is formed with above-mentioned to take over a business 12 and the protruding 16a that combines of chassis 14.Above-mentioned take over a business 12 and chassis 14 on, form groove 10a respectively, 14a.Above-mentioned protruding 16a is embedded in above-mentioned groove 10a by brute force, among the 14a.
Above-mentionedly take over a business on 12 to be formed with suction port 12b,, can pass through above-mentioned suction port 12b, to impeller 10 internal flows by above-mentioned cover 5 suction port 5a leaked-in airs.The central authorities on above-mentioned chassis 14 are formed with motor shaft fixing part 14b, can fixed electrical machinery axle 8a.In the outside of above-mentioned blade 16, by above-mentioned take over a business 12 and chassis 14 and above-mentioned blade 16 form exhaust port 10b.
In addition, above-mentioned as shown in Figure 6 diffuser 20 is being encircled the outside of impeller 10, and the air stream kinetic energy of discharging by exhaust port 10b is converted to the static pressure pressure potential.Above-mentioned diffuser 20 comprises chassis 24, a plurality of wings 26.The wing 26 vertically is formed on the edge on chassis 24, and has the arc-shaped structure that forms along the edge.
Above-mentioned a plurality of wing 26 has along the periphery on above-mentioned chassis 24 from inside to outside crooked circular shape, between each wing 26 across certain intervals.Air flows out by the space between above-mentioned each wing 26 28.And above-mentioned space 28 has from the center of diffuser 20 and becomes big structure to the periphery gradually.
Have the existing vacuum dust collector of said structure, the working procedure of its centrifugal fan is as follows:
After above-mentioned motor 8 was connected power supply, motor shaft 8a began rotation.And above-mentioned motor shaft 8a is fixed on motor shaft fixing part 14b, therefore can rotate above-mentioned impeller 10 by above-mentioned chassis 14.Above-mentioned impeller 10 is under the turning effort of motor 8, and with 30,000～40, the rotating speed of 000rpm is rotated.Along with impeller 10 rotations, by above-mentioned suction port 10a leaked-in air, under the effect of above-mentioned blade 16, behind the increase kinetic energy, 10b discharges by exhaust port.Air by exhaust port 10b discharges at first blows the front end at the above-mentioned wing 26, and the blade 16 that is rotated is sent to above-mentioned space 28, and its part kinetic energy is converted into pressure potential.
But there are the following problems for prior art: when impeller 10 carried out high speed rotating, above-mentioned blade 16 met by the wing 26 front ends of some cycles and above-mentioned diffuser 20 under the high speed rotating effect of impeller 10, the air that force feed is discharged.And the air that meets with the front end of the above-mentioned wing 26 produces the above peak noise of 85dB under the high pressure effect.
Summary of the invention
In order to overcome the above-mentioned shortcoming that existing vacuum dust collector centrifugal fan exists, the invention provides a kind of diffuser of vacuum dust collector, to reduce the noise of air that impeller produces in the process of diffuser force feed air.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of vacuum dust collector centrifugal fan comprises impeller and diffuser, and impeller is rotated under the motor effect, allows air flows, diffuser encircle the outside of impeller, and has several wings, and the wing converts a part of kinetic energy of impeller to pressure potential; It is characterized in that described diffuser has the step-down parts, reduce the pressure that concentrates on wing front end.
Aforesaid vacuum dust collector centrifugal fan, wherein the step-down parts are the ailerons that are provided with across a determining deviation with the front end of the described wing.
Aforesaid vacuum dust collector centrifugal fan, wherein aileron is positioned on the elongation line of the described wing that is bent to form.
Aforesaid vacuum dust collector centrifugal fan, wherein the front end of aileron is positioned on the elongation line of the described wing that is bent to form, and the rearward end of aileron is formed on the outside of described elongation line from the described wing.
Aforesaid vacuum dust collector centrifugal fan, between its wing centre section and the aileron across 1.5mm at interval.
Aforesaid vacuum dust collector centrifugal fan, wherein the length range of aileron is 10%～20% of the described wing and aileron length sum C.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is existing vacuum dust collector exploded perspective schematic representation.
Fig. 2 is the sectional view of main body among Fig. 1.
Fig. 3 is the half-sectional view of existing vacuum dust collector centrifugal cutter part.
Fig. 4 is the sectional view of existing centrifugal blower fan blade wheel and diffuser (diffuser) installation position.
Fig. 5 is the impeller exploded perspective schematic representation of Fig. 4.
Fig. 6 is the schematic perspective view of the diffuser of Fig. 3.
Fig. 7 partly cuts open figure for the centrifugal fan of embodiment of the invention part.
Fig. 8 is the impeller exploded perspective schematic representation of Fig. 7.
Fig. 9 is the schematic perspective view of the diffuser of Fig. 7.
Figure 10 is the plan view of Fig. 9.
Figure 11 is the comparison schematic representation of centrifugal fan level of noise of the present invention and existing centrifugal fan level of noise.
The number in the figure explanation:
40: housing 45: motor
45a: motor shaft 50: impeller
50a: suction port 50b: exhaust port
52: take over a business 52a, 56a: groove
54: blade 54a: projection
56: chassis 60: diffuser
60b: exhaust port 62: chassis
64: wing 64a: front end
66: aileron 66a: front end
66b: rearward end L: the length of aileron
S: the interval between the wing and the aileron
Embodiment
To shown in Figure 10, centrifugal fan of the present invention comprises housing 40, impeller 50, diffuser 60 as Fig. 7.Impeller 50 is arranged on the inside of housing 40, sucks air by housing 40.Diffuser 60 converts the part in the aerodynamic energy of impeller 50 force feeds to pressure potential.
Above-mentioned housing 40 comprises cover 42, and cover 42 is formed with the suction port 42a that is used to suck air.The inboard of above-mentioned suction port 42a is provided with impeller 50.Above-mentioned impeller 50 improves by above-mentioned suction port 42a leaked-in air kinetic energy.
Above-mentioned impeller 50 comprises taking over a business 52, chassis 56, a plurality of blade 54.Take over a business 52 and have suction 50a, can suck air by above-mentioned suction port 42a.Chassis 56 is positioned at and above-mentioned position of taking over a business 52 symmetries.A plurality of blades 54 connect above-mentionedly takes over a business 52 and chassis 56, improves the aerodynamic energy that flows to by suction port 50a.Above-mentioned blade 54 allows and changes flow direction by above-mentioned suction port 50a leaked-in air by 90 °, allows air discharge by circumferencial direction.
Above-mentioned blade 54 has crooked shape, is formed with protruding 54a at upper and lower sides.Above-mentionedly take over a business 52 and chassis 56, be formed with groove 52a, 56a.The protruding 54a of above-mentioned blade 54 can be inserted in above-mentioned groove 52a, in the 56a, fixes.Above-mentioned blade 54 takes over a business 52 and the center on chassis 56 from above-mentioned, by radial arrangement, has certain spacing between each blade 54, and above-mentioned spacing forms exhaust port 50b, is used for exhausting air.
Above-mentioned diffuser 60 comprises chassis 62, a plurality of wings 64 and aileron 66.Impeller 50 is installed on the chassis 62.The wing 64 and aileron 66 are formed on the chassis 62 by Vertical direction, encircle the outside of impeller 50.
Above-mentioned chassis 62 and the wing 64 and aileron 66, by one-piece type formation, the central authorities on above-mentioned chassis 62 form porose 62a.The motor shaft 45a of above-mentioned motor 45 runs through above-mentioned hole 62a and combines with the chassis 56 of impeller 50.
The wing 64 of above-mentioned diffuser 60 has the shape of encircling above-mentioned impeller 50 outsides, and the circumference along above-mentioned chassis 62 is bent to form.Above-mentioned each wing 64 across certain intervals, vertically is formed on above-mentioned chassis 62 each other.Interval between above-mentioned each wing 64 forms exhaust port 60b, exhausting air.The transverse section of above-mentioned exhaust port 60b to the outside, becomes big from the inboard of diffuser 60 gradually.
In addition, diffuser 60 of the present invention is characterised in that to have aileron 66, and aileron 66 forms across certain intervals with the front end 64a of the above-mentioned wing 64.Interval S between the above-mentioned wing 64 and the aileron 66 is 1.5mm.
Above-mentioned aileron 66 is positioned on the elongation line of the above-mentioned wing 64 that is bent to form.The length L scope of aileron 66 is 10%～20% of the above-mentioned wing 64 and aileron length sums.
The radius of curvature of above-mentioned aileron 66 is identical with the radius of curvature of the wing 64.The front end 66a of above-mentioned aileron 66 is positioned at the elongation line of the above-mentioned wing 64, and the rearward end 66b of above-mentioned aileron 66 breaks away from laterally from the elongation line of the above-mentioned wing 64.When allowing the rearward end 66b of above-mentioned aileron 66 outwards break away from elongation line, can allow the air in the effect current downflow of impeller 50 flow to above-mentioned exhaust port 50b more effectively.Even above-mentioned rearward end 66b portion is positioned at the position of outside disengaging elongation line, the spacing between the front end 64a of the above-mentioned wing 64 and the aileron 66 rearward end 66b keeps 1.5mm.
As shown in figure 11, the prior art sound pressure level relevant (SPL, Sound pressurelevel) curve A and centrifugal fan sound pressure level curve B of the present invention with characteristic frequency.The whole sound pressure level (Overall Sound presure level) that curve A and B by Figure 11 obtains comparison shows that, the whole sound pressure level of centrifugal fan of the present invention is 89.3dBA, the whole sound pressure level of existing centrifugal fan is 91.1dBA, and centrifugal fan of the present invention is than the low approximately 1.8dBA of centrifugal fan sound pressure level of prior art.
Below,, the working procedure of the embodiment of the invention is described in detail to Figure 10 with reference to Fig. 7.
At first connect power supply to above-mentioned motor 45.At this moment, along with impeller 50 chassis, 56 rotations that combine with motor shaft 45a, above-mentioned impeller 50 also is rotated by the sense of rotation of motor shaft 45a.During impeller 50 rotations, the blade 54 of above-mentioned impeller 50 improves the aerodynamic energy of impeller 50 inside, allows air discharge to circumferencial direction.The discharge of above-mentioned air can produce pressure difference, and is without interruption on above-mentioned blade 54 by suction port 42a, 50a at air under the above-mentioned action of pressure.
Above-mentioned blade 54 is discharged above-mentioned air by exhaust port 50b.Along with above-mentioned impeller 50 rotations, the wing 64 of above-mentioned blade 54 and above-mentioned diffuser 60 can meet by some cycles.When the above-mentioned blade 54 and the above-mentioned wing 64 met, by the compressed while of air that exhaust port 50b discharges, its part kinetic energy was transformed into pressure potential, and the exhaust port 60b by above-mentioned diffuser 60 discharges.And be formed with aileron 66 on the elongation line of the above-mentioned wing 64.Under the effect of aileron 66, the pressure that produces in the process that the above-mentioned blade 54 and the wing 64 meet can reduce.Thereby, can reduce the pressure that concentrates on the wing 64 front end 64a, and then the whole sound pressure level of the noise that centrifugal fan is produced descends about about 1.8dBA.
The invention effect
Vacuum cleaner centrifugal fan of the present invention, by on diffuser with wing leading section across certain intervals Form aileron, reduce concentrating on the pressure of wing leading section, thereby can reduce blade and the diffusion of impeller The noise that produces in the process that the body wing meets.
Claims (6)
1, a kind of vacuum dust collector centrifugal fan comprises impeller and diffuser, and impeller is rotated under the motor effect, allows air flows, diffuser encircle the outside of impeller, and has several wings, and the wing converts a part of kinetic energy of impeller to pressure potential; It is characterized in that,
Described diffuser has the step-down parts, reduces the pressure that concentrates on wing front end.
2, vacuum dust collector centrifugal fan according to claim 1 is characterized in that described step-down parts are the ailerons that are provided with across a determining deviation with the front end of the described wing.
3, vacuum dust collector centrifugal fan according to claim 2 is characterized in that described aileron is positioned on the elongation line of the described wing that is bent to form.
4, vacuum dust collector centrifugal fan according to claim 2 it is characterized in that the front end of described aileron is positioned on the elongation line of the described wing that is bent to form, and the rearward end of aileron is formed on the outside of described elongation line from the described wing.
5,, it is characterized in that between the described wing and the aileron across the 1.5mm interval according to claim 3 or 4 described vacuum dust collector centrifugal fans.
6, according to claim 3 or 4 described vacuum dust collector centrifugal fans, the length range that it is characterized in that described aileron is 10%～20% of the described wing and aileron length sum C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410020130 CN1727697A (en) | 2004-07-26 | 2004-07-26 | Centrifugal fan of vacuum cleaner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410020130 CN1727697A (en) | 2004-07-26 | 2004-07-26 | Centrifugal fan of vacuum cleaner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1727697A true CN1727697A (en) | 2006-02-01 |
Family
ID=35927147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410020130 Pending CN1727697A (en) | 2004-07-26 | 2004-07-26 | Centrifugal fan of vacuum cleaner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1727697A (en) |
Cited By (4)
| 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 |
| CN102597526A (en) * | 2009-10-28 | 2012-07-18 | 国誉株式会社 | Blower |
| CN103126611A (en) * | 2011-11-30 | 2013-06-05 | 乐金电子(天津)电器有限公司 | Vacuum cleaner fan diffuser structure capable of reducing noise |
| CN112610525A (en) * | 2020-12-09 | 2021-04-06 | 江苏美的清洁电器股份有限公司 | Fan for dust collector and dust collector |
-
2004
- 2004-07-26 CN CN 200410020130 patent/CN1727697A/en active Pending
Cited By (4)
| 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 |
| CN102597526A (en) * | 2009-10-28 | 2012-07-18 | 国誉株式会社 | Blower |
| CN103126611A (en) * | 2011-11-30 | 2013-06-05 | 乐金电子(天津)电器有限公司 | Vacuum cleaner fan diffuser structure capable of reducing noise |
| CN112610525A (en) * | 2020-12-09 | 2021-04-06 | 江苏美的清洁电器股份有限公司 | Fan for dust collector and dust collector |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |