CN100489316C - Centrifugal fan and vacuum cleaner having the centrifugal fan - Google Patents
Centrifugal fan and vacuum cleaner having the centrifugal fan Download PDFInfo
- Publication number
- CN100489316C CN100489316C CNB2005100847841A CN200510084784A CN100489316C CN 100489316 C CN100489316 C CN 100489316C CN B2005100847841 A CNB2005100847841 A CN B2005100847841A CN 200510084784 A CN200510084784 A CN 200510084784A CN 100489316 C CN100489316 C CN 100489316C
- Authority
- CN
- China
- Prior art keywords
- air
- diffuser
- impeller
- centrifugal fan
- conducting member
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
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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
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
- F04D29/444—Bladed diffusers
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/22—Mountings for motor fan assemblies
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L5/00—Structural features of suction cleaners
- A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
- A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2250/00—Geometry
- F05D2250/50—Inlet or outlet
- F05D2250/52—Outlet
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A centrifugal fan includes a driving motor for generating a rotational force; an impeller connected with the driving motor by a rotational shaft and generating an air blowing force; a partition plate installed inside an impeller casin; a diffuser formed at an edge portion of an upper surface of the partition plate and increasing a pressure of air which has passed through the impeller; a rear vane formed at a lower surface of the partition plate and guiding air discharged from the diffuser so as to pass through the driving motor; and an air guiding member formed at certain intervals at an outer surface of the diffuser and guiding air which has passed through the diffuser toward the rear vane. Air which has passed through the diffuser is forcibly introduced to the lower side of the partition plate, so a flow loss caused as air is re-circulated to the upper side of the partition plate after passing through the diffuser can be reduced, and thus, a suction force and efficiency of the centrifugal fan can be enhanced.
Description
Technical field
The present invention relates to a kind of centrifugal fan of vacuum dust collector, being particularly related to a kind ofly can increase the centrifugal fan of suction and efficient to the blade guiding to reduce air flow losses by the force air ground that will send out from diffuser, and the vacuum cleaner with this centrifugal fan.
Background technique
Fig. 1 is the sectional view according to centrifugal fan of the prior art.
Traditional centrifugal fan comprises: impeller housing 104, and it has the intakeport 102 that forms in its front side; Motor case 108, it is connected with this impeller housing 104 and has an exhaust port 106 that is used to send air; Drive motor 110, it is installed in this motor case 108 and produces rotating force; Impeller 116, it can be rotatably set in this impeller housing 104, and is connected with this drive motor 110 to produce air blown power by rotating shaft 112; And guide vane 130, it is arranged on the rear side of this impeller 116, with the static pressure that increases the air that sends from this impeller 116 and the air that will send from this impeller 116 by drive motor 110 guiding exhaust ports 106.
This impeller 116 comprises by support 140 and is fixed on wheel hub 118 in this rotating shaft 112, and a plurality of blade 120, and described blade 120 along the circumferential direction equally spaced is connected to the external peripheral surface of wheel hub 118, and radially sends air.
As shown in Figure 2, this guide vane 130 comprises: a plurality of diffusers 132, and its external peripheral surface at the blade 120 of impeller 116 forms with certain interval from the end of blade 120; Dividing plate 134, its inner circumferential surface that is formed with the impeller housing 104 of diffuser 132 fixed thereon; And rear blade 136, the air that it is formed on the lower surface of this dividing plate 134 and guiding is discharged from diffuser 132 is so that it is by this drive motor 110.
This traditional centrifugal fan operation is as follows.
When rotating shaft 112 was rotated under the driving of drive motor 110, rotary blade 116 was to suck air by intakeport 102.Radially send to pass through this diffuser 132 by the blade 120 of 102 inhaled airs of this intakeport by impeller 116, the static pressure of this air increases by diffuser 132 time, then, this air by this impeller housing inner circumferential surface and the space between the external peripheral surface of this dividing plate flow downward.Again then, this air by rear blade 136 guiding centres so that be guided through this drive motor.By this drive motor 110 time, this air cooling motor 110, and emit outwardly by the exhaust port 106 that is formed on this motor case 108 then.
Yet this traditional centrifugal fan has following problem.
Promptly, because pressure difference based on the both sides up and down of this dividing plate 134, be back to the upside of dividing plate 134 because of the centrifugal force of impeller 116 by this part of air of diffuser 132, rather than be sent to the downside of this dividing plate, cause the loss of air stream, it can cause the decline of this fan suction and efficient.
Summary of the invention
Therefore, the objective of the invention is for a kind of centrifugal fan is provided, thereby it can also will direct into loss raising suction and the efficient that rear blade reduces air stream from the air that this diffuser is discharged by the air conducting member is installed on diffuser, and the vacuum dust collector with this centrifugal fan.
Purpose according to the present invention as implementing herein and extensively describing in detail, provides a kind of centrifugal fan in order to realize these and other advantage, and it comprises: drive motor, and it is used to produce rotating force; Impeller, it is connected with this drive motor by rotating shaft and produces air blown power; Dividing plate, it is installed in impeller housing inside; Diffuser, it has a plurality of diffuser vanes, and described a plurality of diffuser vanes are arranged to each other edge section at the upper surface of this dividing plate along the circumferential direction with the certain spacing crossover, and increase the pressure by the air of this impeller; Rear blade, it is formed at air that lower surface of this dividing plate and guiding discharge from this diffuser so that by this drive motor; And the air conducting member, it is formed at the outer surface of each described diffuser vane and will passes through this rear blade of air guide of this diffuser with certain interval.
This air conducting member forms plate and forms downward-sloping in a side of this diffuser vane with the fin type; This side of one side of this air conducting member and this diffuser vane is integrally formed, and the opposite side of this member contacts with the inner circumferential surface of this impeller housing.
For reaching described purpose, a kind of vacuum dust collector also is provided, it comprises: main body of dust collector, this main body have and are used to produce the centrifugal fan of suction and the filter that gathers dust that is used to gather dust; And the suction nozzle that is used to draw dust; Wherein this centrifugal fan comprises: drive motor, and it is used to produce rotating force; Impeller, it links to each other with this drive motor by rotating shaft and produces air blown power; Dividing plate, it is installed in impeller housing inside; Diffuser, it has a plurality of diffuser vanes, and described a plurality of diffuser vanes are arranged to each other edge section at the upper surface of this dividing plate along the circumferential direction with the certain spacing crossover, and increase the pressure by the air of this impeller; Rear blade, it is formed at air that lower surface of this dividing plate and guiding discharge from this diffuser so that by this drive motor; And the air conducting member, its outer surface at each described diffuser vane forms with certain interval and will pass through this rear blade of air guide of this diffuser.
Describe above-mentioned and other purpose, technical characteristics, scheme and beneficial effect of the present invention in detail below in conjunction with accompanying drawing is clearer.
Description of drawings
The accompanying drawing that is comprised to be embodying further understanding of the invention, and is incorporated in the specification and constitutes the part of specification, and described accompanying drawing also shows embodiments of the invention, and explains basic principle of the present invention with specification.
Wherein, description of drawings is as follows:
Fig. 1 is the sectional view according to centrifugal fan in the prior art;
Fig. 2 is the stereogram according to the guide vane of centrifugal fan in the prior art;
Fig. 3 is the stereogram according to vacuum dust collector of the present invention;
Fig. 4 is the sectional view according to the main body of vacuum dust collector of the present invention;
Fig. 5 is the sectional view according to centrifugal fan of the present invention;
Fig. 6 is the stereogram according to the guide vane of centrifugal fan of the present invention;
Fig. 7 is the enlarged view of A part among Fig. 6;
Fig. 8 to 10 is the performance chart between centrifugal fan and the centrifugal fan of the prior art according to the present invention.
Embodiment
To describe in detail with reference to the accompanying drawings according to the centrifugal fan of preferred embodiment of the present invention and vacuum cleaner with this centrifugal fan.
Fig. 3 is the stereogram of the vacuum dust collector according to the present invention, and Fig. 4 is the sectional view according to vacuum cleaner main body of the present invention.
Vacuum cleaner according to the present invention comprises: main body of dust collector 14, and it has filter of gathering dust 10 and centrifugal fan 12; Extension tube 18, it links to each other with main body of dust collector 14 by suction hose 16; And suction nozzle 20, it is installed in the end of this extension tube 18 and draws dust and refuse from the ground.
This main body of dust collector 14 comprises: first chamber 24, and it has the joint 22 that forms in its front side, and suction hose 16 is connected to this joint 22, and the filter 10 that gathers dust is installed in first chamber 24; And second chamber 26, centrifugal fan 12 wherein is installed.Filter 28, it is installed in the suction side of this second chamber 26, and exhaust port 30 its formation are to be used for and will to discharge from centrifugal fan 12 air discharged.
As shown in Figure 5, this centrifugal fan 12 comprises: impeller housing 52, and it has the intakeport 50 that is formed at its front side; Motor case 56, it is installed on the downside of this impeller housing 52 and has the exhaust port 54 that is used for exhaust; Drive motor 58, it is installed in this motor case 56 and produces rotating force; Impeller 62, it can be rotatably set in this impeller housing 52 and by rotating shaft 60 and links to each other with this drive motor to produce air blown power; And guide vane 68, it can be rotatably set in the rear side of this impeller 62, and the air that sends from this impeller 116 with the static pressure that increases the air that sends from this impeller 62 and guiding is so that it flows to this exhaust port 54 by this drive motor 58.
This drive motor 58 comprises: stator 70, and it is fixed on the inner circumferential surface of motor case 56, and and power connection; Rotor 72, it is arranged on the inner circumferential surface of this stator 70, and when stator 70 was connected power supply, rotor 72 was by the electromagnetic force rotary driving.Rotating shaft 60 is fixed on the rotor 72.
Fig. 6 is the stereogram of the guide vane of centrifugal fan according to the present invention, and Fig. 7 is the enlarged view of A part among Fig. 6.
This guide vane 68 comprises: board-like dividing plate 82, and it is arranged at the downside of this impeller 62; A plurality of diffusers 80, it to be equidistantly being formed on the edge section of this dividing plate upper surface, and described diffuser 80 with the certain spacing setting, and increases the static pressure of the air that this impeller 62 sent from the external peripheral surface of these impeller 62 blades 66; Rear blade 84, it is formed on lower surface of this dividing plate 82 and air that guiding is discharged from this diffuser 80 so that it is by this drive motor 58; And a plurality of air conducting members 90, its at the outer surface of described a plurality of diffusers 80 with equidistant formation, and will be force air ground by this diffuser to rear blade 84 guidings to reduce flow losses.
Described a plurality of diffuser 80 comprises: a plurality of diffuser vane 80a, and it is arranged to each other edge section at the upper surface of this dividing plate 82 along the circumferential direction with the certain spacing crossover; And passage 86, it is formed between the diffuser vane 80a to allow air stream through therebetween.Because for this passage 86, the area of outlet side that is disposed to this passage of this rear blade 84 by its air is led to the area of the suction side of this passage greater than the air that sends from this impeller 62, so air can spread to increase its static pressure and to reduce air flow rate.
Described air conducting member 90 is formed on the side of each diffuser vane 80a.Described air conducting member 90 vertically forms the fin template in this each diffuser vane 80a outside.Air conducting member 90 forms downward-sloping at the outlet side of the passage 86 of this diffuser 80.One side of this air conducting member 90 and this side of diffuser vane 80a are integrally formed, and the opposite side of this air conducting member 90 contacts with the inner circumferential surface of this impeller housing 52.
This rear blade 84 forms along outside direction with spiral lower surface at this dividing plate 82, with directed stream when the diffuser 80 and increase the static pressure air to drive motor 58.
The working procedure of the centrifugal fan of structure will be described as follows as mentioned above.
When this drive motor was connected power supply, this rotor 72 rotated according to the interaction of this rotor 72 and stator 70, and correspondingly, rotating shaft 60 rotations that are connected to this rotor 72 are to rotate this impeller 62.Then, air sucks by intakeport 50, and inhaled air radially sends the passage 86 of the air stream that is sent between diffuser vane 80a, the static pressure of air increase during this period by a plurality of blades 66.
After 80s by this diffuser, air sends downwards by the space between the inner circumferential surface of this dividing plate 82 and this impeller housing 52, and is guided by the rear blade 84 that is formed on these dividing plate 82 lower surfaces, and is led to this drive motor 58 subsequently.
At this, because this air conducting member 90 that air is formed on these diffuser 80 1 sides forcibly is directed to the downside of dividing plate 82, when the loss in air air flows that is caused during side reflux on this dividing plate 82 after 80s by diffuser can be reduced.
In this way, the air that rear blade 84 is guided carries out cooling down operation to this drive motor 58 between stator 70 by this drive motor 58 and rotor 72 time, is discharged away by the exhaust port 54 that forms on this drive motor shell 56 then.
Fig. 8 to 10 is according to the performance chart between centrifugal fan of the present invention and the existing centrifugal fan.
As shown in Figure 8, according to the degree of vacuum of centrifugal fan of the present invention degree of vacuum under high air quantity situation greater than the centrifugal fan in the correlation technique.
As shown in Figure 9, according to the power of centrifugal fan of the present invention power under high air quantity situation greater than the efficient of the centrifugal fan in the correlation technique.
As shown in figure 10, according to the efficient of centrifugal fan of the present invention efficient under high air quantity situation greater than the centrifugal fan in the correlation technique.
As mentioned above, according to centrifugal fan of the present invention and dust catcher with this centrifugal fan following advantage is arranged.
That is,, be forced to direct into the downside of this dividing plate by the air of this diffuser because the air conducting member of this fin type is formed at the outside of the diffuser vane of this diffuser.Therefore, loss be can reduce, and the suction and the efficient of this centrifugal fan therefore can be improved owing to the air stream that side reflux caused on this dividing plate after air is by this diffuser.
Because the present invention need not to break away under the situation of spirit of the present invention or essence technical characteristics; can implement in a variety of forms; it should be understood that; except that other has specified otherwise; the above embodiments are not limited by the details in the above-mentioned explanation; and understand widely in the spirit and scope that should in appended claims, be limited, therefore fall into all changes of the boundary of described claim and protection domain and modification or all should be included by claims with the equivalent of boundary and scope.
Claims (8)
1. centrifugal fan, it comprises:
Drive motor, it is used to produce rotating force;
Impeller, it links to each other with this drive motor by rotating shaft and produces air blown power;
Dividing plate, it is installed in impeller housing inside;
Diffuser, it has a plurality of diffuser vanes, and described a plurality of diffuser vanes are arranged to each other edge section at the upper surface of this dividing plate along the circumferential direction with the certain spacing crossover, and increase the pressure by the air of this impeller;
Rear blade, it is formed at air that lower surface of this dividing plate and guiding discharge from this diffuser so that it is by this drive motor; And
The air conducting member, the air that it is formed at the outer surface of each described diffuser vane and has passed through this diffuser to this rear blade guiding.
2. fan as claimed in claim 1, wherein this air conducting member forms the fin template.
3. fan as claimed in claim 1, wherein this air conducting member forms downward-sloping in the side of this diffuser vane.
4. fan as claimed in claim 3, wherein this side of a side of this air conducting member and this diffuser vane is integrally formed, and the opposite side of air conducting member contacts with the inner circumferential surface of this impeller housing.
5. vacuum dust collector, it comprises:
Main body of dust collector, it has and is used to produce the centrifugal fan of suction and the filter that gathers dust that is used to gather dust; And
Suction nozzle, it is used to draw dust;
Wherein this centrifugal fan comprises:
Drive motor, it is used to produce rotating force;
Impeller, it links to each other with this drive motor by rotating shaft and produces air blown power;
Dividing plate, it is installed in impeller housing inside;
Diffuser, it has a plurality of diffuser vanes, and described a plurality of diffuser vanes are arranged to each other in the edge section of the upper surface of this dividing plate along the circumferential direction with the certain spacing crossover and are increased pressure by the air of this impeller;
Rear blade, it is formed at air that lower surface of this dividing plate and guiding discharge from this diffuser so that it is by this drive motor; And
The air conducting member, the air that it is formed at the outer surface of each described diffuser vane and has passed through this diffuser to this rear blade guiding.
6. the described vacuum cleaner of claim 5, wherein this air conducting member forms the fin template.
7. the described vacuum cleaner of claim 5, wherein this air conducting member forms downward-sloping in this side of this diffuser vane.
8. the described vacuum cleaner of claim 7, wherein this side of a side of this air conducting member and this diffuser vane is integrally formed, and the opposite side of air conducting member contacts with the inner circumferential surface of this impeller housing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020040056491A KR20060007637A (en) | 2004-07-20 | 2004-07-20 | Guide vane structure of fan-motor for vacuum cleaner |
| KR1020040056491 | 2004-07-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1724878A CN1724878A (en) | 2006-01-25 |
| CN100489316C true CN100489316C (en) | 2009-05-20 |
Family
ID=35115756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100847841A Expired - Fee Related CN100489316C (en) | 2004-07-20 | 2005-07-20 | Centrifugal fan and vacuum cleaner having the centrifugal fan |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1618821B1 (en) |
| KR (1) | KR20060007637A (en) |
| CN (1) | CN100489316C (en) |
| DE (1) | DE602005017332D1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0613796D0 (en) * | 2006-07-12 | 2006-08-23 | Johnson Electric Sa | Blower |
| KR101108166B1 (en) * | 2010-02-09 | 2012-01-31 | 삼성모바일디스플레이주식회사 | Organic luminescent device including barrier comprising silicon oxide layer and silicon rich silicon nitride layer |
| US9142804B2 (en) | 2010-02-09 | 2015-09-22 | Samsung Display Co., Ltd. | Organic light-emitting device including barrier layer and method of manufacturing the same |
| US20120186036A1 (en) * | 2011-01-25 | 2012-07-26 | Kegg Steven W | Diffuser for a vacuum cleaner motor-fan assembly |
| JP2020112145A (en) * | 2019-01-17 | 2020-07-27 | 日立グローバルライフソリューションズ株式会社 | Electric blower and vacuum cleaner with the same |
| CN110336440B (en) * | 2019-05-09 | 2020-08-11 | 宁波大华电器有限公司 | Brushless motor for dust collector |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69205907D1 (en) * | 1991-06-18 | 1995-12-14 | Kuraco Ltd | Fat extractor. |
| EP0556895A1 (en) * | 1992-02-17 | 1993-08-25 | Koninklijke Philips Electronics N.V. | Device for displacing a gaseous or liquid medium, and vacuum cleaner comprising such a device |
| DE19606146A1 (en) * | 1996-02-20 | 1997-08-21 | Vorwerk Co Interholding | High-speed electric motor |
| DE29717906U1 (en) * | 1997-10-08 | 1999-02-04 | Bosch Siemens Hausgeraete | fan |
| EP1297772B1 (en) * | 2001-09-26 | 2010-03-31 | Lg Electronics Inc. | Centrifugal blower for vacuum cleaner |
| GB2388017A (en) * | 2002-04-30 | 2003-11-05 | Johnson Electric Sa | Diffuser plate |
-
2004
- 2004-07-20 KR KR1020040056491A patent/KR20060007637A/en not_active Application Discontinuation
-
2005
- 2005-07-18 DE DE602005017332T patent/DE602005017332D1/en active Active
- 2005-07-18 EP EP05291532A patent/EP1618821B1/en not_active Expired - Fee Related
- 2005-07-20 CN CNB2005100847841A patent/CN100489316C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP1618821B1 (en) | 2009-10-28 |
| EP1618821A3 (en) | 2006-06-07 |
| EP1618821A2 (en) | 2006-01-25 |
| KR20060007637A (en) | 2006-01-26 |
| DE602005017332D1 (en) | 2009-12-10 |
| CN1724878A (en) | 2006-01-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090520 Termination date: 20180720 |