CN1075605C - Electric dust suction means - Google Patents
Electric dust suction means Download PDFInfo
- Publication number
- CN1075605C CN1075605C CN96122044A CN96122044A CN1075605C CN 1075605 C CN1075605 C CN 1075605C CN 96122044 A CN96122044 A CN 96122044A CN 96122044 A CN96122044 A CN 96122044A CN 1075605 C CN1075605 C CN 1075605C
- Authority
- CN
- China
- Prior art keywords
- centrifugal impeller
- mentioned
- impeller
- electric
- electric blower
- 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
-
- 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
- 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
- A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
- A47L9/2836—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means characterised by the parts which are controlled
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
Abstract
A vacuum cleaner equipped with an electric air blower consisting of a motor and a centrifugal impeller in the main body of the vacuum cleaner, uses such an electric air blower that the coefficient of discharge &phiv e sought by formula &phiv e=Q/(60.&pi .D2 .b2 .u2 ) falls within the range of 0.03-0.05, and also the specific rate Ns sought by formula Ns=(N.Q<0.5> .H<-0.75> ) is set to the range of 140-180. Thus electric vacuum cleaner of high adsorption efficiency and low cost and compact size is obtained.
Description
The invention relates to the electric dust collector that uses electric blower, particularly about small-sized and lightly reach the invention of the high electric dust collector of output power with centrifugal impeller.
Existing electric dust collector, disclosed the sort of as Japan's special permission open communique 55-87894 number (1980).The aerodynamic characteristics of this electric dust collector as shown in Figure 2, the suction air quantity of transverse axis is more little, the load of commutator machine is also more little, current value promptly consumes electric power and reduces.On the other hand, the suction efficiency of representing among the figure (sucking air quantity * degree of vacuum) also just reduces.In addition, along with the maximization of electric dust collector in recent years, suck air quantity and constantly increasing, even if but on the maximum quantity of wind shelves suction efficiency also still very low, from the viewpoint of power consumption, the above-mentioned suction efficiency that improves by blower efficiency and electric efficiency decision has become the task of top priority.
According to above-mentioned prior art, on the one hand, for improving blower efficiency, will improve air-tightness, prevent the leakage that each position produces because of the high pressure difference, also will reduce aeration resistance, can adopt for this reason and set up sealed member, improve the dimensional accuracy of component, perhaps take to guarantee big means such as breathing area, but all be and the method that reduces cost and miniaturization runs in the opposite direction.
On the other hand,, will take to strengthen winding diameter and reduce copper loss, and use senior silicon steel plate reducing the means such as iron loss of iron core, but exist too and reduce cost and problem that the miniaturization requirement is not inconsistent for improving efficiency of motor.
Like this, along with motor as the raising of the electric blower efficient of blower driving source, manufacture cost will increase, weight will increase, it is heavier that vacuum cleaner becomes, and has the user, particularly old man and women are because of the too heavy and unhandy problem of machine.
The purpose of this invention is to provide a kind of electric blower efficient, be the suction efficiency height of vacuum cleaner, the small-sized and light and handy electric dust collector of low cost of manufacture.
The method that achieves the above object is, for the electric dust collector that in the electric dust collector main body, has the electric blower that constitutes by motor and centrifugal impeller, above-mentioned electric blower, at the extraction flow coefficient φ e that this electric blower is obtained with formula (1) is in 0.03 to 0.05 the scope time, this electricity is had the outlet diffusion fan wing vis-a-vis of leading edge and above-mentioned centrifugal impeller; It is characterized in that: above-mentioned electric blower is in 0.03 to 0.05 the scope time at the extraction flow coefficient φ e that obtains with formula (1) of this electric blower, this electric blower with being set in 140 to 180 the scope that formula (2) is obtained than fast Ns,
φe=Q/(π·D
2·b
2·u
2) (1)
Ns=(N·Q
0.5·H
-0.75) (2)
Wherein, Q-air quantity (m
2/ min),
D
2The external diameter of-centrifugal impeller (m),
b
2The exit width of-centrifugal impeller (m),
u
2The peripheral velocity of-impeller periphery (m/min),
N-rotating speed (rpm),
H-pressure head (m);
The exit width b of the impeller periphery of above-mentioned centrifugal impeller
2With impeller outer diameter D
2Ratio can be set in 0.085 to 0.133 the scope.
On the basis of technique scheme, connect the long-pending S of imaginary circle anchor ring of each wheel blade central authorities front end of above-mentioned centrifugal impeller
1Inlet area S with this centrifugal impeller
0Ratio S
1/ S
0Can be set in the scope of 1.0-1.4.
In addition, further feature of the present invention is that electric dust collector has electric blower, and this electric blower comprises centrifugal impeller and motor, with the wheel blade inlet area S of the imaginary annulus of each wheel blade central authorities front end of the connection of this centrifugal impeller
1Inlet area S with this centrifugal impeller
0Ratio S
1/ S
0Be set in 1.0～1.4 scopes, above-mentioned motor makes the rotational speed of above-mentioned centrifugal impeller with 40000～50000rpm.
According to the present invention, because can improve the efficient of electric blower, so the external diameter of impeller can miniaturization.Like this, electric dust collector can be realized small-sized, light and handyization, and suction efficiency can be improved simultaneously, and output power is big.
Fig. 1 is the longitdinal cross-section diagram of the used electric blower of the electric dust collector of one embodiment of the present of invention.
Fig. 2 is the accompanying drawing of expression electric dust collector aerodynamic characteristics.
Fig. 3 is the accompanying drawing of expression with respect to the electric blower efficient of rotating speed.
Fig. 4 is expression with respect to the ratio of rotating speed speed and the impeller periphery exit width accompanying drawing with the impeller outer diameter ratio.
Fig. 5 is the present invention's accompanying drawing compared with the prior art of the aerodynamic characteristics of expression electric blower.
Fig. 6 is the side view of the electric dust collector outward appearance of one embodiment of the present of invention.
Fig. 7 is the profile of main body of dust collector longitudinal cross-section of the electric dust collector of Fig. 6.
Fig. 8 is the profile of longitudinal cross-section of the centrifugal impeller of one embodiment of the present of invention.
Below, with reference to accompanying drawing example of the present invention is described.
At first, before embodiment is described, earlier problem and invention thought are described in detail.
As mentioned above, in Fig. 2, suction efficiency represents with air quantity * degree of vacuum, represents maximum value with the work air quantity of the decisions such as aeration resistance of the characteristic of blower and main body of dust collector, general home-use vacuum cleaner with consumption electric power 1000W level is an example, air quantity 1.0-1.5 (m
3/ min) be maximum.What existing home-use vacuum cleaner used is to consume the motor of electric power about 500W, and still, along with market requires to improve suction efficiency and power consumption is increased every year, the 1Kw level becomes main flow recently.
Suction efficiency is one of index of expression vacuum cleaner dust removal ability, improve the performance of vacuum cleaner, and it is extremely important to improve this index.Particularly in recent years, be the more and more diversified of representative with ground by the dust suction surface, no matter which kind of situation can both be cleaned totally because require, and very strong inhalation power must be arranged.
Represented as " suction efficiency=fan output power-ventilation loss ", in order to improve suction efficiency, just must improve the output power (the aerodynamic force output power of electric blower) of fan, reduce ventilation loss (the ventilation loss of main body of dust collector).But as long as the form of vacuum cleaner is constant, because for example strengthen the operability that caliber, expansion main body of dust collector etc. can reduce vacuum cleaner, it is very difficult reducing the ventilation loss significantly.
On the other hand, in order to improve the output power of fan, represented as " fan power=power input to machine (consumption electric power) * electric efficiency * blower efficiency ", as long as improve the every of the right, but, consume electric power and be main flow, consider that from the energy-conservation tendency of the day household electric appliance probably should further not improve again with the 1000W level.
So,, just must improve the efficient of motor and blower, i.e. the efficient of electric blower in order to improve the output power of fan.The efficient of so-called electric blower draws divided by power input to machine (W) with aerodynamic fan output power (W).
About this point, in the past the raising of motor and blower efficiency was paid attention to, carry out optimal design respectively, the external diameter of centrifugal impeller is set at about 105-115mm, the exit width of centrifugal impeller is set at about 7-8.5mm, and revolution is set at 30000-35000rpm, and air quantity is 1.0-1.5 (m
3/ min) time, can reach 45-48%.
Existing, be converted into dimensionless number as the numerical value shown in will be here by the flow of impeller, promptly the extraction flow coefficient is in the scope of 0.03-0.05, the amount rotating speed (N) relevant with impeller and to impeller diameter (D
2) ratio speed (Ns) be about 130.
The extraction flow coefficient φ e of fluid machinery centrifugal blower with than fast Ns by following formula definition.
φe=Q/(π·D
2·b
2·u
2) (1)
Ns=(N·Q
0.5·H
-0.75) (2)
Q wherein: air quantity (m
3/ min), D
2: the external diameter of centrifugal impeller (m),
b
2: the exit width of centrifugal impeller (m), u
2: the peripheral velocity of impeller periphery (m/min)
N: rotating speed (rpm), H: pressure head (m)
H=Pin/ γ, Pin: suck static pressure (mmAq), γ: proportion (kgf/m
3)
Now the invention thought that solves above-mentioned problem is described.
At first, in Fig. 3, motor when having represented different rotating speeds and blower efficiency and product thereof, the i.e. efficient of electric blower.But, the characteristic curve of this figure because of used component material, shape are different can be different, an example when it has represented to obtain efficient according to existing structure condition.
Shown in this figure, usually, along with the increase of rotating speed, the bearing loss, the frictional loss that are called as mechanical loss also increase thereupon, and electric efficiency has the tendency of decline.In contrast, adopt the blower efficiency of centrifugal cutter, as shown in Figure 3, the tendency of raising is arranged then.This is that for the part throttle characteristics with fan adapts, its external diameter is less because of the increase along with rotating speed, and fan disk friction loss reduces like this, and blower efficiency is improved.
From the product of motor and blower efficiency, promptly the efficient of electric blower is greatly peak value about about 45000rpm, all can descend down thereon, but in the scope of 40000-50000rpm, efficient surpasses 50%.
Therefore, have the highest electric blower efficient in order to make, also the i.e. electric blower of high suction efficiency is 40000-50000rpm with speed setting, just can obtain high efficiency.
Fig. 4 represented considering the centrifugal impeller speed up, under the situation that reduces pathization that the disk friction loss carries out and necessary output characteristics, and to the ratio speed of rotating speed, and the relation of impeller periphery exit width and the ratio of impeller outer diameter.As shown in the figure, for each the suitable key element that obtains the electric blower maximal efficiency is, at speed setting during at 40000-50000rpm, than speed (Ns=(NQ
0.5H
-0.75)) be 140 to 180 scope, at this moment the ratio of impeller periphery exit width and impeller outer diameter is 0.085 to 0.133 scope.
According to above-mentioned setting, can obtain the maximal efficiency of electric blower, improve the suction efficiency of electric dust collector.In addition, because impeller outer diameter is realized pathization, electric blower is also with regard to miniaturization, so vacuum cleaner itself also can be realized small-sized, light and handyization, use and operating characteristics are improved.
Below, with reference to accompanying drawing embodiments of the invention are described.
At first accompanying drawing is described.Fig. 1 is the longitudinal section of the used electric blower of the electric dust collector of one embodiment of the present of invention.Fig. 2 is the aerodynamic nomogram of electric dust collector.Fig. 3 is the accompanying drawing of electric blower efficient of the different revolutions of expression, and Fig. 4 is the ratio speed of the different revolutions of expression and impeller periphery exit width and the accompanying drawing of impeller outer diameter ratio.Fig. 5 is the present invention's accompanying drawing compared with the prior art of the aerodynamic characteristics of expression electric blower.Fig. 6 is the side view of the electric dust collector outward appearance of one embodiment of the present of invention.Fig. 7 is the profile of main body of dust collector longitudinal cross-section of the electric dust collector of Fig. 6.Fig. 8 is the profile of longitudinal cross-section of the centrifugal impeller of one embodiment of the present of invention.
Electric dust collector, shown in 6 figure, in interior electric dust collector main body 201 of establishing electric blower and dust-collecting filter, be provided with the infrared rays acceptance division 202 that remotely-controlled operation is used, on the set pipe holding part 204 of the front end that can be connected the pipe 203 on this electric dust collector main body 201 freely to rotate, adorning dust-sucking hole 206 by prolonging pipe 205.The switching manipulation portion 207 that pipe holding part 204 has the electric blower in the control electric dust collector main body 201 to use, and the infrared rays emission part 208,209 that control signal is passed to infrared rays acceptance division 202 with ultrared form.
Electric dust collector main body 201, as shown in Figure 7, by lower cover 301, loam cake 302 and dust-collecting cover 303 constitute gabarit.Form dust-sucking hole 304 in dust-collecting cover 303, side forms the dust precipitation chamber 306 that holds the collection bag 305 that is connected with above-mentioned dust-sucking hole 304 within it.In the back of dust precipitation chamber 306 are the electric blower chambers 307 that formed by lower cover 301 and loam cake 302, have held electric blower 308 in this electric blower chamber 307.The suction side of this electric blower 308 is communicated with dust precipitation chamber 306 by after-filter 309.The exhaust side of electric blower 308 is opened to the outside from relief opening 310 by exhaust chamber and discharge filter.
Below, with reference to Fig. 1 electric blower 308 is elaborated.
This electric blower chamber 308 can be divided into blower 1 and motor 2.Blower 1 is by centrifugal impeller 12, and from this centrifugal impeller 12 of sandwich, its fan guard that holds 13 and Diffuser 10 are constituted.
The hood that motor 2 is made of electrical machinery cover 3 and axle head carriage 9, the stator 7 that the rotor 5 of the rotating shaft 4 that is contained in this hood is arranged and adorning stator coil 6 constitute.Electrical machinery cover 3 forms the dark cup-shaped that is provided with the 3a of strait flange portion in its open end, be provided with the bearing 8a of above-mentioned rotating shaft 4 one ends of supporting on the bearing holding part 3b that the central part of its end face forms.Peripheral part in this electrical machinery cover 3 end face portion one side forms relief opening 3c.The open side of these electrical machinery cover 3 ends combines with axle head carriage 9, and by this axle head carriage 9, this motor 2 joins with above-mentioned blower 1.
Axle head carriage 9 forms the end face portion of bearing holding part 9a by portion in the central and constitutes the tazza shape with the tubular peripheral part that is provided with wide lip part 9b in its open end, forms the air that will come out from blower 1 at peripheral part and introduces intakeport 9c in the motor 2.Be provided with the bearing 8b of supporting shaft 4 the other ends at bearing holding part 9a.
In the outside of this axle head carriage 9, be provided with the Diffuser 10 that links to each other with intakeport 9c, side is provided with the centrifugal impeller 12 that is fixed in the end of rotating shaft 4 with bolt 11 at its upstream.Diffuser 10 is covered with in the lip part 9b periphery mode of being tightly connected with axle head carriage 9 with centrifugal impeller 12 and is pressed into fixing fan guard 13.
In the central authorities of fan guard 13, promptly be positioned near the intakeport 13b of a core and be provided with guiding successfully sucks centrifugal impeller 12 from the air of the upstream flow further downstream of this intakeport 13b air flow guiding device 13a.The sectional shape of this air flow guiding device 13a forms circular arc, and the sealed member 14 of the entrance part sliding contact that the side plate central part with above-mentioned centrifugal impeller 12 forms is housed in the inboard of circular arc, makes intakeport keep airtight.
This air flow guiding device 13a; can reduce maximization with electric dust collector, air quantity increases the air turbulence that produces, cause because of the influence of the after-filter 309 of the upstream of as shown in Figure 7 the intakeport 13b that is arranged in centrifugal impeller 12 and protective gear (figure does not express) etc. and peels off, and has avoided the reduction of suction efficiency.
Below, the air stream in the electric blower 308 is described.After motor 2 was driven, centrifugal impeller 12 rotated, and air flows in the fan guard 13 from intakeport 13b.At this moment, air flow guiding device 13a carries out rectification to the air stream that flows into centrifugal impeller 12.The air stream of discharging from centrifugal impeller 12 passes through between diffusion fan wing 10a, turn to 180 ° in the annular gap between the interior week of the periphery of Diffuser 10 and fan guard 13, then, by after the 10b of return flow line, be introduced in the electrical machinery cover 3 by intakeport 9c.The rotor 5 that has been introduced into air cooling in the electrical machinery cover 3, the inside by stator 7 and electrical machinery cover 3 forms air passageways simultaneously, cooling stator coil 6, from relief opening 3c row to the outside.
Fig. 8 has at length represented the shape of above-mentioned centrifugal impeller 12.This centrifugal impeller 12 is radial configuration by 6 blades 17 and constitutes between side plate 18 and mainboard 19.In the both sides of each blade 17, form the claw that combines with side plate 18 and mainboard 19, above-mentioned claw is embedded in the hole set on side plate 18 and the mainboard 19, and reinforces, and it is combined respectively.Inlet 18a at the central part opening of side plate 18 is formed by a slick and sly mouthful upwardly extending entrance part 18b, W make its with the intakeport 13b that forms by said flow fluid director 13a on set above-mentioned sealed member 14 sliding contacts.Why such centrifugal impeller 12 can raise the efficiency, and important reasons is because making inhaled air swimmingly, not produce loss ground flows, and this back is elaborated again.
Getting back to Fig. 3, Fig. 4 now is elaborated to the embodiment of the electric dust collector of the electric blower that adopts above-mentioned formation.At first, represented efficient among Fig. 3, the efficient of blower 1, and both products, the i.e. result of calculation of the efficient of electric blower 308 for the motor 2 of different rotating speeds according to present embodiment.
As shown in Figure 3, the product of electric efficiency and blower efficiency, promptly the efficient of electric blower is greatly peak value when 45000rpm, surpasses 50% in the about scope internal efficiency of 40000-50000rpm.Therefore, in order to obtain maximum electric blower efficient, i.e. Zui Da suction efficiency, the rotating speed of electric blower should be set in 40000-50000rpm.
Under the situation of considering the pathization of carrying out and necessary output characteristics for the disk friction loss that reduces centrifugal impeller 12, the external diameter that is fit to, as shown in Figure 3, most effective during 80-100mm.Therefore, according to above-mentioned situation, for the maximal efficiency of the electric blower that obtains assembling, suitable index is 40000-50000rpm, and the external diameter of centrifugal impeller 12 is 80-100mm.
So impeller outer diameter can dwindle, like this, main body of dust collector can small-sized, light and handyization.Because realized light and handyization, it is just easy to carry, and operability is improved.
Fig. 4 is according to The above results, represented the relation of the ratio speed of different revolutions and impeller periphery exit width and impeller outer diameter ratio.Ratio speed (Ns=(the NQ of the index 40000-50000rpm that is fit to
0.5H
-0.75)) be 140 to 180 scope, at this moment the ratio of impeller periphery exit width and impeller outer diameter is 0.085 to 0.133 scope.By above-mentioned setting, the extraction flow coefficient of electric blower (φ e=Q/ (π D
2B
2U
2)) in 0.03 to 0.05 scope, the efficient of electric blower reaches more than 50%.
In other words, inlet area compares S
1/ S
0Surpass at 1.4 o'clock, with respect to inlet area S
0The inlet area S of blade
1Excessive, the central part from inlet inhaled air stream from centrifugal impeller 12 is to peripheral part, and when flowing to the blade central part front end 17a of blade 17, the deceleration in the stream is too fast, and air-flow is stripped from, and produces disorder, and noise is very big, and the impeller internal loss increases, and efficient reduces.
On the other hand, inlet area compares S
1/ S
0Be lower than at 1.0 o'clock, the inlet area S of blade
1With respect to inlet area S
0Too small, from inlet inhaled air stream, when peripheral part flow to the wing central part front end 17a of blade 17, flow velocity increased sharply from the central part of centrifugal impeller 12, and air excess ground sucks, thereby the loss that frictional loss, conflict cause increases the efficient reduction.
For for reference, existing inlet area compares S
1/ S
0Be the scope of 1.58-1.63, the area of the scope that the present invention is such is than not adopted by the electric blower as electric dust collector as yet.
In other words, as long as being equipped with, electric dust collector make inlet area compare S
1/ S
0Be set in centrifugal impeller in 1.0 to 1.4 the scope with the electric blower of the motor of the rotational speed of 40000-50000rpm, the efficient of this electric blower can reach more than 50%, electric dust collector can be realized small-sized, light and handyization, and output power can improve.
Fig. 5 has represented the experimental result of electric dust collector of embodiments of the invention and the comparison of existing products.The figure shows the aerodynamic characteristics of electric blower, transverse axis is represented the extraction flow coefficient, and the longitudinal axis represents that pressure coefficient is with electric blower efficient and than speed.
The centrifugal impeller of present embodiment, outside dimension D
2=φ 95mm, periphery exit width b
2=8.1mm, blade inlet diameter dimension D
1=φ 36.7mm, the number of blade 17 are 6 pieces.The periphery exit width b of impeller
2With the impeller outer diameter dimension D
2Ratio be 0.085, inlet area compares S
1/ S
0Be 1.2.Existing centrifugal impeller, outside dimension D
2=φ 110mm, periphery exit width b
2=7.0mm, blade inlet diameter dimension D
1=φ 42.5mm, the number of blade 17 are 6 pieces.The periphery exit width of impeller is 0.064 with the ratio of impeller outer diameter size, and the inlet area ratio is 1.58.
The electric power of present embodiment consumption is 1000W, represents that the action air quantity of maximum suction efficiency is about 1.4 (m
3/ min), be that the air quantity scope of general home-use vacuum cleaner of 1000W level is at 1.0-1.5 (m still at the electric power that consumes
3/ min) within.
The extraction flow coefficient is greatly about about 0.045.Near this point ratio speed is increased to 150 of scope of the present invention from about 135 of existing products, and the efficient of electric blower also brings up to 50% from 46% thereupon, improves 4 percentage points.Because the raising of efficient, the output power of fan has improved, and suction efficiency has approximately improved 40W.That is to say that this has proved that the result that the index to be fit to of above-mentioned Fig. 3, Fig. 4 is calculated is correct.
As mentioned above, according to the above embodiments of the present invention, the efficient of electric blower can be brought up to more than 50%, and the suction efficiency of electric dust collector can be improved.Because impeller outer diameter realized pathization, so that electric blower becomes is small-sized.
Like this, the electric dust collector main body can realize small-sized, light and handyization, and service behaviour is improved.
Claims (3)
1. electric dust collector, it has electric blower, and this electric blower has: (a) motor; (b) centrifugal impeller, this centrifugal impeller are fixed in the rotating shaft by the rotation of above-mentioned motor driving, have towards along the intakeport of the direction opening of above-mentioned rotating shaft and than intakeport near above-mentioned motor one side and be arranged on a plurality of blades in the above-mentioned rotating shaft; (c) Diffuser, this Diffuser have the outlet diffusion fan wing vis-a-vis of leading edge and above-mentioned centrifugal impeller; It is characterized in that:
Above-mentioned electric blower is in 0.03 to 0.05 the scope time at the extraction flow coefficient φ e that obtains with formula (1) of this electric blower, this electric blower with being set in 140 to 180 the scope that formula (2) is obtained than fast Ns,
φe=Q/(π·D
2·b
2·u
2) (1)
Ns=(N·Q
0.5·H-
0.75) (2)
Wherein, Q-air quantity (m
2/ min),
D
2The external diameter of-centrifugal impeller (m),
b
2The exit width of-centrifugal impeller (m),
u
2The peripheral velocity of-impeller periphery (m/min),
N-rotating speed (rpm),
H-pressure head (m);
The impeller periphery exit width b of above-mentioned centrifugal impeller
2With impeller outer diameter D
2Ratio be set in 0.085 to 0.133 the scope.
2. electric dust collector as claimed in claim 1 is characterized in that: the blade inlet area S of the hypothesis annulus of the connection blade central part front end of above-mentioned centrifugal impeller
1Inlet area S with this centrifugal impeller
0Ratio S
1/ S
0Be set in 1.0 to 1.4 the scope.
3. electric dust collector as claimed in claim 1 or 2 is characterized in that: the fan guard that holds above-mentioned centrifugal impeller has the air that can allow from the upstream flow further downstream of this intakeport and sucks air flow guiding device above-mentioned centrifugal impeller, that guide this air swimmingly near the intakeport the axle center that is positioned at this fan guard.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP256356/95 | 1995-10-03 | ||
| JP256356/1995 | 1995-10-03 | ||
| JP7256356A JPH0998918A (en) | 1995-10-03 | 1995-10-03 | Vacuum cleaner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1154447A CN1154447A (en) | 1997-07-16 |
| CN1075605C true CN1075605C (en) | 2001-11-28 |
Family
ID=17291551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96122044A Expired - Fee Related CN1075605C (en) | 1995-10-03 | 1996-10-03 | Electric dust suction means |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH0998918A (en) |
| KR (1) | KR0176004B1 (en) |
| CN (1) | CN1075605C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012012937A (en) * | 2010-06-29 | 2012-01-19 | Panasonic Corp | Impeller, and electric blower and electric cleaner provided with impeller |
| CN103169424A (en) * | 2011-12-20 | 2013-06-26 | 乐金电子(天津)电器有限公司 | Diffuser capable of effectively reducing passing noise of vanes of motor |
| US9757000B2 (en) | 2013-12-24 | 2017-09-12 | Samsung Electronics Co., Ltd. | Cleaning device |
| KR102171271B1 (en) * | 2013-12-24 | 2020-10-28 | 삼성전자주식회사 | Cleaner |
| CN104879318A (en) * | 2015-05-14 | 2015-09-02 | 苏州永捷电机有限公司 | Dust collector motor |
| TWI613370B (en) * | 2017-01-20 | 2018-02-01 | 湯秉輝 | Diversion structure |
| CN106958538B (en) * | 2017-05-11 | 2019-12-31 | 美的集团股份有限公司 | Centrifugal fan and dust collector with same |
| JP7354569B2 (en) * | 2019-03-28 | 2023-10-03 | ニデック株式会社 | Air blower and vacuum cleaner |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4227855A (en) * | 1978-08-25 | 1980-10-14 | Cummins Engine Company, Inc. | Turbomachine |
| SU1236186A1 (en) * | 1984-05-04 | 1986-06-07 | Предприятие П/Я А-3884 | Impeller for centrifugal pump |
| SU1317184A1 (en) * | 1985-12-11 | 1987-06-15 | Производственное объединение "Невский завод" им.В.И.Ленина | Centrifugal compressor impeller |
| EP0694697A1 (en) * | 1994-07-30 | 1996-01-31 | Braun Aktiengesellschaft | Impeller for a radial fan |
-
1995
- 1995-10-03 JP JP7256356A patent/JPH0998918A/en not_active Withdrawn
-
1996
- 1996-10-02 KR KR1019960043708A patent/KR0176004B1/en not_active IP Right Cessation
- 1996-10-03 CN CN96122044A patent/CN1075605C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4227855A (en) * | 1978-08-25 | 1980-10-14 | Cummins Engine Company, Inc. | Turbomachine |
| SU1236186A1 (en) * | 1984-05-04 | 1986-06-07 | Предприятие П/Я А-3884 | Impeller for centrifugal pump |
| SU1317184A1 (en) * | 1985-12-11 | 1987-06-15 | Производственное объединение "Невский завод" им.В.И.Ленина | Centrifugal compressor impeller |
| EP0694697A1 (en) * | 1994-07-30 | 1996-01-31 | Braun Aktiengesellschaft | Impeller for a radial fan |
Non-Patent Citations (1)
| Title |
|---|
| 机械设计手册 1996.1.3 机械工业出版社 * |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0998918A (en) | 1997-04-15 |
| CN1154447A (en) | 1997-07-16 |
| KR970020018A (en) | 1997-05-28 |
| KR0176004B1 (en) | 1999-02-01 |
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