CN1200634C - Electric dust collector - Google Patents
Electric dust collector Download PDFInfo
- Publication number
- CN1200634C CN1200634C CNB021066515A CN02106651A CN1200634C CN 1200634 C CN1200634 C CN 1200634C CN B021066515 A CNB021066515 A CN B021066515A CN 02106651 A CN02106651 A CN 02106651A CN 1200634 C CN1200634 C CN 1200634C
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- Prior art keywords
- blade
- ratio
- centrifugal impeller
- dust collector
- area
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- 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
- A47L9/0081—Means for exhaust-air diffusion; Means for sound or vibration damping
-
- 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
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S416/00—Fluid reaction surfaces, i.e. impellers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention discloses an electric dust collector with a wind volume more than 1.0 m<3>/min. The rotating number of an electric blower is set between 40000-50000rpm. A ratio between the area of a virtual annulus ring to interconnect the front ends on the central side of the blades of a centrifugal impeller and the inlet area of the centrifugal impeller is set to a range of 1.0-1.4. A ratio between the width size at the outer circumferential outlet of the blade and the outer diameter size is set to more than 0.07. A ratio between the flow path section area of the inner circumferential side of the blade and the flow path section area of the outer circumferential side is set to below 0.74. A ratio between the inlet width size of the blade and the outlet width size is below 2.0, and a ratio between the curvature radius of the round corner and the inlet width size of the blade is set to a range of 0.6-0.9.
Description
The application is that denomination of invention is " electric dust collector ", the applying date to be that on 06 26th, 1996, application number are dividing an application of female case of 96106924.4.
Technical field
The present invention relates to electric dust collector, particularly as the miniaturization and and the high outputization of the electric blower of its inhalation power driving source.
Background technique
Current general home-use electric dust collector, the market demands of the carpet rubbish that is difficult to draw for adaptation etc. require to have stronger inhalation power.With sucking power as representing to suck unit of force.In recent years, along with the improvement of this suction power, having sold power is the electric dust collector of 1000W level motor.
In electric dust collector, mainly use commutator motor, its aerodynamic characteristics is as shown in Figure 2.In Fig. 2, the aerodynamic characteristics of electric dust collector, along with the suction air quantity of transverse axis reduces, the load that is added to commutator motor diminishes, and current value, is that power consumption reduces, and revolution increases.Therefore, in usually maximum (opening) air quantity territory, the power consumption maximum of motor, at the air quantity air-tight state, the rotation number maximum of motor.Foregoing suction power, available air quantity X degree of vacuum represent that expression is by the maximum value of the work air quantity of the decisions such as ventilation impedance of characteristic that is installed in the blower on the motor and main body of dust collector.At the electric dust collector of general home-use power 1000W, suck air quantity and be 1.0-1.5m to the maximum
3/ min.
This sucks power, is one of the value of the inlet capacity of expression vacuum cleaner, and on the meaning of the stronger inhalation power that obtains vacuum cleaner, it also is important making its raising.Especially in recent years, as shown in the flooring, by variedization of dust suction face.From which kind of situation all will require dust suction as early as possible, be necessary stronger inhalation power in.
In addition, can use:
Suck aerodynamic force output (fan-out)-main body of dust collector ventilation loss of power=electric blower
Expression sucks power.Thus, in order to improve suction power, be necessary to improve the output of fan or reduce the loss that main body is ventilated.This can for example make the increasing diameter of flexible pipe thick by means of the form of conversion vacuum cleaner, make main body of dust collector increase etc., though can reduce the ventilation loss of main body like this, but owing to use the operability of vacuum cleaner to reduce, so can not adopt the way of the form that changes vacuum cleaner.On the other hand, can use
Fan output=motor input (power consumption) * motor efficiency * blower efficiency
The output of expression fan.In order to improve fan output, though can improve power consumption, motor efficiency and blower efficiency respectively, for power consumption, the 1000W level has become main flow, when when energy-conservation trend is considered, as housed device, power is increased to more than the 1000W.
Therefore, improve, be necessary to improve motor and blower, be the efficient (aerodynamic fan output (w)/motor input (w)) of electric blower in order to make fan output.
In the past, the efficient of paying attention to motor and blower improved, and sought optimization separately, established the external diameter of centrifugal cutter and got 105-115mm, and setting rotation number is 30000-35000 rev/min, makes the efficient of motor and blower reach 45-48%.
Summary of the invention
Yet, electric dust collector in the past, in order to improve blower efficiency, in order to seek to reduce pressure leakage loss at each position, or make air-tightness improve or reduce the impedance of ventilating, so or design sealing component or improve the dimensional accuracy of part or guarantee big vent area etc., adopted and the method opposite that reduce cost with miniaturization.
In addition, in order to improve the efficient of motor, overstriking winding wire footpath causes the maximization of expense rising and motor again to reduce copper loss, to adopt the few senior silicon steel sheet of iron loss to be reduced in the iron loss of core part, and the corresponding problem that causes vacuum cleaner operability deterioration.Therefore, the purpose of this invention is to provide a kind ofly when reducing manufacturing expense and miniaturization and, make the electric blower and the electric dust collector of the suction power reforming of electric blower efficient and vacuum cleaner.For reaching aforementioned purpose, electric dust collector of the present invention is characterized in that: comprise that the generation of commutator motor and centrifugal cutter sucks the electric blower of air-flow, the suction air-flow that produces by this electric blower make dust carry out control of dust dust collecting section and in adorn the main body of dust collector of described electric blower and described dust collecting section.The suction air quantity of described electric dust collector is at 1.0m
3The zone that/min is above, the rotation number of setting described electric blower is in 40000-50000rpm.
Electric dust collector of the present invention, its feature also is: the power consumption in the maximum quantity of wind zone of described electric dust collector is about 1000W, and the suction air quantity of described electric dust collector is at 1.0m
3The rotation number of described electric blower is set in the 40000-50000rum during above regional of/min.Electric dust collector of the present invention, its feature also is: the power consumption in the maximum quantity of wind zone of described electric dust collector is about 1000W, and the suction air quantity of described electric dust collector is at 1.0m
3The rotation number of this electric blower is set in the 40000-50000rpm during above regional of/min, and the length of the running shaft of described commutator motor is below 100mm.
Electric dust collector of the present invention, its feature also is: the power consumption in the maximum quantity of wind zone of described electric dust collector is about 1000W, and the suction air quantity of described electric dust collector is at 1.0m
3The rotation number of this electric blower is set in the 40000-50000rPm during regional on the/min, and the external diameter of the commutator of described commutator motor is 18-23mm.
Electric dust collector of the present invention, its feature are that also the armature coil line footpath of described commutator motor is 0.6.More than, field coil line footpath is more than 1.1mm.
Electric dust collector of the present invention, its feature are that also the specific resistance of the carbon brush of described commutator motor is below 20 μ Ω m.
Electric dust collector of the present invention, its feature also is, be provided with topped be fixed on centrifugal impeller on the motor rotation axis around fan guard, be installed in the air sucking mouth at the central part of the side plate of this centrifugal impeller of suction port of the central part of described fan guard, the electric blower that connects, the blade of this centrifugal impeller is near the area S of the interconnected hypothesis annulus of front end of the center side of impeller
1Inlet area S with this centrifugal impeller
0Ratio S
1/ S
0Make 1.0-1.4.The outer circumferential side exit width size b of blade
2With outside dimension D
2Ratio (b
2/ D
2) be set in more than 0.07.Flow path cross sectional area (the D of interior all sides of blade
1B
1) and the flow path cross sectional area (D of outer circumferential side
2B
2) ratio (D
1B
1/ D
2B
2) be set in below 0.74.The inlet of blade is wide goes into size b
1With exit width size b
2Ratio b
1/ b
2Be set in below 2.0.
Electric dust collector of the present invention, its feature also be, the suction oral area of described centrifugal impeller has fillet and installing erectly, the radius of curvature R and the blade inlet width dimensions b of the described fillet during described centrifugal impeller
1Ratio R/b
1Be set in the 0.6-0.9 scope.
Electric dust collector of the present invention, its feature also are, the air-flow conductor that can justify the air-flow that guides described fan guard suction port is set suitablely.
Electric dust collector of the present invention, its feature also is, the dust precipitation chamber that comprises the suction port connection that is connected with flexible pipe, electric blower chamber that forms at this dust precipitation chamber rear and the electric blower that is arranged in this electric blower chamber, this electric blower is equiped with the topped fan guard on every side that is fixed on the centrifugal impeller on the motor rotation axis, suction port in the upright installing of central part of the side plate of the suction port of the central part of this fan guard and described centrifugal impeller connects, with the area S of the interconnected hypothesis annulus of front end of the center side of the close impeller of the blade of this centrifugal impeller
1Inlet area S with this centrifugal impeller
0Ratio S
1/ S
0Make 1.0-1.4.Outer circumferential side exit width size b with blade
2With outside dimension D
2Ratio b
2/ D
2More than 0.07, the outer D of the flow path cross sectional area of interior all sides of blade
1B
1Flow path cross sectional area (D with outer circumferential side
2B
2) ratio D
1B
1/ D
2B
2)) below 0.74, the throat width size b of blade
1With exit width size b
1Ratio b
1/ b
2) below 2.0, the radius of curvature R and the blade inlet width dimensions b of the fillet when meridian plane is observed entrance part
1Ratio R/b
1Be set in the 0.6-0.9 scope.
Adopt the present invention, at 40000-50000 rev/min, can make the efficient of electric blower reach more than 50%, can improve the suction power of electric blower by means of the rotation number of setting electric blower.
Adjust the electromagnetic property of fan load characteristic and motor, can make the electric blower lightweight, so can improve usability and operability.
The occasion that rises in the rotation number of electric blower because of axial length is below the 100mm, and the commutator external diameter is set in 18-23mm, so even also can be guaranteed the rigidity of axle.
In addition, adopt the present invention, by means of inlet area S to centrifugal impeller
0With blade inlet S
1And the radius of curvature R of the fillet of side plate entrance part and blade inlet width b1 consider, and then to the outer circumferential side exit width size b of blade
2With outside dimension D
2Ratio b
2/ D
2, blade the flow path cross sectional area (D of interior all sides
1B
1) and the flow path cross sectional area (D of outer circumferential side
2B
2) ratio (D
1B
1/ D
2B
2), the throat width size b of blade
1With exit width size b
2Ratio b
1/ b
2Radius R and blade inlet width dimensions b with described fillet when meridian plane is observed entrance part
1Ratio R/b
1Consider, can seek to improve blower efficiency and reduce noise.
In addition, use the electric blower of this centrifugal impeller, because of shortening axial length, so can produce high air-supply efficient, the electronic blower of low noise miniaturization and electric dust collector.
Description of drawings
Fig. 1 represents the longitudinal section of the electric blower relevant with the embodiment of the invention 1.
Fig. 2 represents the figure of the aerodynamic characteristics of the electric dust collector relevant with the embodiment of the invention 1.
Fig. 3 represents for the electric blower rotation number relevant with the embodiment of the invention 1 and the graph of a relation of efficient.
Fig. 4 a represents the sectional view of the electric blower commutator relevant with the embodiment of the invention 1.
Fig. 4 b represents the sectional view of the electric blower commutator relevant with the embodiment of the invention 1.
Fig. 5 represents the commutator segment of the electric blower relevant with the embodiment of the invention 1 and the figure of commutator external diameter relation.
Fig. 6 represents the commutator outside diameter tolerance of the electric blower relevant with the embodiment of the invention 1 and the figure of axial length relation.
Fig. 7 represents the longitudinal section of the centrifugal impeller of the electric blower relevant with other embodiments of the invention.
Fig. 8 represents that the inlet area of the centrifugal impeller of the electric blower relevant with other embodiments of the invention compares S
1/ S
0Performance plot with relationship between efficiency.
Fig. 9 represents the fillet radius of curvature R and the blade inlet width b of entrance part of the centrifugal impeller of the electric blower relevant with other embodiment of the present invention
1Ratio R/b
1Performance plot with relationship between efficiency.
Figure 10 represents the stereoscopic figure of the electric dust collector relevant with the embodiment of the invention 1.
Figure 11 represents the sectional arrangement drawing of the electric dust collector relevant with the embodiment of the invention 1.
Below the embodiment, embodiments of the invention are described with reference to accompanying drawing.
Embodiment 1
Figure 10 represents the stereoscopic figure of the electric dust collector relevant with the embodiment of the invention 1.In Figure 10, the 1001st, the main body of dust collector of built-in control circuit and electric blower etc., the 1002nd, be connected the flexible pipe on the suction oral area of main body of dust collector 1001, the 1003rd, at one end connect rail pipe 1002, the hose grip of holding for the user simultaneously, the 1004th, be connected the prolongation pipe on the other end of hose grip 1003, the 1005th, be connected the suction inlet that prolongs on the pipe 1004,1006 are arranged on all switching manipulation portions on 1003 of hose grip, 1007 are arranged on all first infrared luminous parts on 1003 of hose grip, 1008 are arranged on all second infrared luminous parts on 1003 of hose grip, 1009 are arranged on the infrared rays photographic department above the main body of dust collector 501, the indoor ceiling board of 1010 expressions.
Figure 11 represents the sectional arrangement drawing of the electric dust collector relevant with embodiments of the invention 1.
Main body of dust collector 1001 is included in its anterior lower case 1101 that covers the bottom; Cover the lid 1102 of its front upper; Be arranged on the suction port 1103 on the lid 1102; Pack into the dust precipitation chamber 1104 of collection bag; For having the sealing that is installed on the lid 1102 with other member, tightness, lid 1102 in the maintenance dust precipitation chamber keep covering 1105; Be provided with the electric blower chamber 1108 that forms with lower case 1101 and upper case 1106 at its rear portion.The collection bag 1107 of packing in dust precipitation chamber 1104, packing in electric blower chamber 1108 is used to collect the electric blower 1109 of dust.Filter 1110 is set on the suction side of this electric blower 1109, and is communicated with dust precipitation chamber 1104.Wall top at the lower case 1101 of the bottom that forms dust precipitation chamber 1104 sets liner 1111, and this liner 1111 and sealing are kept cover 1105 crimping, and maintenance dust precipitation chamber 1104 is airtight.On the top of upper case 1106, form and use the substrate assembly department 1113 that chassis lid 1112 covers, installation and control substrate 1114.Control panel 1114 also can be installed on upper case side or the upper case lid side by constituting more than one or two.Control base stage 1114 is provided with the infrared rays photoreceptor element 1115 of reception from the infrared signal of first infrared luminous part 1007 of hose grip 1003 and 1008 emissions of second infrared luminous part.For receiving infrared-ray signal on this infrared rays photoreceptor element 1115, on upper case lid 1112, be provided with in the infrared rays sensitization that other material that infrared rays is seen through makes 1009.Infrared rays photographic department 1009 also can form incorporate structure with the upper case lid 1112 with the permeable material system of infrared rays.
Below, with reference to Figure 10 and Figure 11 the action of electric dust collector related to the present invention is described.
Fig. 1 represents the sectional arrangement drawing of embodiment 1 electric blower 1109.
On the peripheral part of the end face portion side of this cabinet 3, form relief opening.Then, on the opening of this cabinet 3 was distolateral, connecting end support 9 connected these motor part 2 and aforementioned blower portion 1 by this end support 9.
Utilization is in the end face portion that forms bearing holding part 9a in the central authorities of aforementioned end support 9 and the tubular peripheral part of wide protuberance 9b is set on its open end, end support 9 is constituted shallow cup-shaped, on peripheral part, be formed for the air from blower portion 1 is imported intakeport 9c in the motor part 2.On aforementioned bearings holding part 9a, the 8b that holds that the other end to aforementioned running shaft 4 supports is set.In addition on the outside of this end support 9, set the diffuser 10 that is connected with aforementioned intakeport 9C, and utilize nut to flow side thereon to set centrifugal impeller 12 on the end that is fixed on aforementioned running shaft 4.Then, the fan guard 13 with on the periphery that is pressed into the protuberance 9b that is fixed on aforementioned end support 9 covers aforementioned diffuser and centrifugal impeller 12.In addition, in the central authorities of fan guard 13, be provided with by utilizing air-flow is being justified the suction port 13b that the air-flow conductor-13a in the inlet that imports to aforementioned centrifugal impeller forms suitablely, forming its section shape of air-flow conductor 13a makes circular-arc, the sealing component 14 in the portion is returned in the suction of adorning the central authorities of the side plate that is slidingly connected at aforementioned centrifugal impeller 12 on the inboard of circular arc, keeps sucking the airtight of oral area.
Diffuser 10 be included in 17 diffuser vanes that the outer circumferential side of centrifugal impeller 12 prolong to go up forms and on its back one side, form return conductor 10b, return conductor 10b with end support 9, form air stream is directed to the path of navigation that returns that aforementioned intakeport 9c goes.
Then, the air flows in the electric blower 1109 is described.When drive motor portion 2 and make centrifugal impeller when rotation, air flows in the fan guard 13 from suction port 13b.At this moment, air-flow conductor 13a carries out rectification to the air stream that flows in centrifugal impeller 12.The air stream that spues from centrifugal impeller 12, between diffuser vane 10a, the annular gap portion conversion 180 degree directions between the interior week of the periphery of diffuser 10 and fan guard 13, and then by after returning conductor 10b, lead in people's cabinet 3 by intakeport 9c.Import the air in the cabinet 3, in the time of cooled rotor 5, by due to 7 and the inner face of cabinet 3 between the air flue that forms, cooling stator coil 6, and discharge to the outside from relief opening.
Then, with reference to Fig. 2 the suction power of vacuum cleaner is described.
The suction power of representing vacuum cleaner with air quantity * degree of vacuum.This suction power is used the action air quantity by decisions such as the characteristic of blower and the ventilation impedances of main body of dust collector, and the expression maximum value is the general domestic vacuum cleaners of 1000w level to power consumption, and maximum quantity of wind is per minute 1.0-1.5m
3Suck the reference value of power for the inlet capacity of expression vacuum cleaner.It is important making its improvement on the function of vacuum cleaner.No matter recent especially dwelling house by dust suction face variedization that become, requires in the dust suction promptly of which kind of situation.For this reason, require stronger inhalation power.
With: the ventilation loss that sucks aerodynamic force system output (the fan-out)-main body of dust collector of power=electric blower represents to suck power.That is to say, in order to improve suction power, essential fan-out or the minimizing main body ventilation loss of increasing.
Reduce the ventilation consume of main body, the volume that can take for example to increase the diameter of thick flexible pipe or increase main body of dust collector, but can cause the corresponding maximization of main body of dust collector like this and operability is reduced.
On the other hand, use:
Fan output=motor input (power consumption) * motor efficiency * blower efficiency
The expression fan-out.Can adopt to make every improvement, about power consumption, the 1000W level has become main flow, when the tendency of the day of saving energy is considered, can think can not make its further increase as housed device.Therefore, in order to improve fan-out, be necessary to improve motor and blower, be the efficient of electric blower.Electric blower efficient is divided by aerodynamic fan-out (w) with motor input (w).
Below, the means of the efficient of improving electric blower are described.
Fig. 3 represents blower portion 1, motor part 2 and carries out result calculated as the electric blower 1109 of its product corresponding to the efficient of rotating speed.
Its expression under structural condition in the past, is tried to achieve an example of efficient according to the part material that uses, the difference of formation.
In Fig. 3, along with the raising of motor 2 rotation numbers, the bearing loss and the frictional loss that are referred to as mechanical loss increase, have the tendency that lowers efficiency.To this, have the efficient of the blower portion 1 of centrifugal impeller 12, show tendency along with the increase efficient raising of rotation number.
In addition,, be necessary to dwindle the external diameter of centrifugal impeller 12 for the rotation number that makes centrifugal impeller 12 increases,
Thus, can reduce the plectane frictional loss of centrifugal impeller 12 and improve the efficient of blower 1.Here, when the efficient investigated as the electric blower 1109 of those products, near about 45000 rev/mins, be peak value, in about 40000-50000 rev/min zone, efficient is above 50%.Therefore, in order to obtain the electric blower of maximum electric blower efficient, i.e. maximum suction power, rotation number should be set in 40000-50000 rev/min.
In addition, in the occasion of commutator motor, the rectified action of the carbon brush 16 that characteristic is influenced to some extent, having when high speed rotating becomes unsettled tendency.
Here, be necessary to consider the torque characteristics of ball bearing of rectification characteristic, bearing 8a, 8b of the carbon brush 16 of high speed rotating and the intensity of the commutator 27 made by the moulding material of synthetic resin shown in Fig. 4 a, Fig. 4 b etc.
On the other hand, in order to reduce the frictional loss of carbon brush 16, wish that the external diameter of commutator 27 is little.Therefore, consider with the sliding properties of carbon brush, for making the concavo-convex result who studies its optimum value that minimizes of the commutator segment in the rotation, and then, for the life-span that prolongs aforementioned carbon brush 16, the reliability of guaranteeing motor, for the whirling precision in the rotation that improves important commutator 27, be necessary to improve the intensity of commutator and improve motor the axle rigidity.
Fig. 6 represents the figure of the relation of commutator outside diameter tolerance and axial length.
As shown in Figure 6 as can be known, axial length is short, and rigidity increases, and is suitable for high speed rotating.Usually, draw from the sliding properties of the carbon brush of the resin blacklead matter series of using this commutator motor: as make the whirling of the external diameter of commutator 27, be controlled at below the 20 μ m, then its corresponding rotating speed is 40000-50000 rev/min, and corresponding this rotating speed, axial length is necessary to make below the 100mm.
In addition, for the minor diameterization of the centrifugal impeller 12 that reduces the plectane frictional loss with when considering necessary output characteristics, when external diameter 18mm was following, the thermal capacity of commutator segment reduced.Shown in Fig. 4 a, Fig. 4 b, requirement along with recent electric blower miniaturization, the size apart from B of inner circumferential side and running shaft outer circumferential sides does not obtain greatly on distance A on the commutator segment between negative area and projection front end and the commutator segment, when when 23mm is above, self weight of 27 in commutator increases, centrifugal force increases, the concavo-convex of commutator segment also increases, and the abrasion of carbon brush 16 increases.For this reason, in the occasion of rotational speed being put at 40000-50000 rev/min, the characteristic of still keeping electric blower 1109 does not reduce, and is necessary the commutator external diameter is done into about below the 23mm.
In order to prevent that rectification in the thermal degradation when of the concavo-convex and carbon brush 16 of sheet or for motor characteristic is reduced, is necessary to control the heating of carbon brush 16 as far as possible,, the electrical impedance rate of carbon brush 16 must be made below the 20 μ Ω m in order to suppress the heating of carbon brush 16.
Suitable external diameter as shown in Figure 3, demonstrates maximal efficiency at 70-100mm.
In sum as can be known, as electric blower, for obtaining the optimum value of maximal efficiency, the rotation number of centrifugal impeller 12 is 40000-50000 rev/min, and the external diameter of centrifugal impeller 12 is 70-100mm.
Below, represent other embodiment related to the present invention with Fig. 7-Fig. 9.
Fig. 7 at length represents the shape of aforementioned centrifugal impeller 12.Dispose 6 blades 17 radially, constitute this centrifugal impeller 12 at side plate 18 and 19 of main bodys.On the both sides of each blade 17, be provided with the claw that is used to connect side plate 18 and mainboard 19, by means of the square hole that is arranged on side plate 18 and the mainboard 19 that aforementioned claw engaging is also fastening, they are coupled together respectively.Then, utilize the suction oral area 18b of the upright installing with fillet, the suction port 18a of opening on the central part of side plate 18 slips with the close member 14 of aforementioned envelope that is arranged on the suction port 13b that is formed by aforementioned air-flow conductor 13a.
In this centrifugal impeller 12,, flowed in the harmless smoothly lost territory of inhaled air in order to raise the efficiency the reduction noise.
According to inventor's etc. observation, the diameter dimension of establishing the inlet 18a of the side plate 18 that the suction of this high lobus cardiacus wheel 12 falls is D
0The time inlet area S
0(=π/4D
0 2) be of a size of D with the diameter (blade inlet diameter) of the imaginary annulus of the center side front end 17a that is connected each blade 17
1Blade inlet area S
1(=π D
1B
1) inlet area compare S
1/ S
0, compare S at inlet area
1/ S
0Big occasion is as blade inlet area S
1For inlet area S
0When excessive, flow from the inlet inhaled air, when peripheral part flow to the inner 17a that the center of blade 17 surveys, the deceleration in the stream increased sharp from the central part of impeller 12, cause that sinuous flow is peeled off, produced to fluid, noise increases, the loss increase in impeller, efficient reduce.On the other hand, compare S at inlet area
1/ S
0Little occasion is promptly as blade inlet area S
1With respect to inlet area S
0When too small,, when peripheral part flows to the inner 17a of central side of blade 17, become speedup stream, force and be pressed into air from the central part of impeller 12 from inlet inhaled air stream, thus frictional loss and since the loss increase of conflict, efficient reduce.
According to the research of a large amount of experiments, the cruces of having understood fully this air flows is the inlet area S of centrifugal impeller 12
0With blade inlet area S
1And the radius of curvature R of the fillet of the entrance part 18b of drafting board 18 and blade inlet width b
1To the influence of efficient, so, describe with reference to Fig. 8 and Fig. 9 with its result.This experiment is with the outside dimension D of centrifugal impeller 12
2=Φ 95mm, blade inlet diameter dimension D
1The number of=Φ 36.7mm, blade 17 is 6 and exit width b
2=8.1mm is that carry out on the basis.
Fig. 8 represents to compare S about the area of entrance part
1/ S
0The measurement result of experiment.Transverse axis represents that area compares, the longitudinal axis is represented blower efficiency.Here, blower efficiency η is tried to achieve by blower output (aerodynamic output)/motor input/motor efficiency.Symbol " zero " is meant blade inlet width dimensions b
1The occasion of=9.0mm, symbol " " are meant blade inlet width dimensions b
1The occasion of=8.1mm.No matter in which kind of occasion, the trend of efficiency curve is identical.
When area compares S
1/ S
0Be on 1.4 the time, efficient is the tendency that slowly reduces, on the contrary, and when area compares S
1/ S
0Be 1.0 when following, can infer that its efficient constantly reduces.That is to say, can prove in the loss increase of impeller inside as previously mentioned.The area of cause electric blower in the past is than the scope that is about 1.5-1.6, as this inlet area is compared S
1/ S
0Be set in the 1.0-1.4 scope, can raise the efficiency.In this example, but the efficient more than 0.3% is the phase, so the output of blower increases more than about 3W, can improve suction performance.
Fig. 9 is illustrated in the radius of curvature R and the blade inlet width b of the fillet of the suction oral area 18b that forms suction port 18a on the central part of side plate 18 with transverse axis
1Ratio R/b
1, represent efficient with the longitudinal axis.Inlet area compares S
1/ S
0Be 1.24, the outside dimension D of impeller 12
2The result who studies for Φ 95mm and Φ 97mm.No matter in which kind of occasion, at radius of curvature R and blade inlet width b
1Ratio when 0.75 left and right sides, the efficient maximum.In this example, be shown as maximum value during for 7mm when radius of curvature.
At radius of curvature R and blade inlet width b
1Ratio less than 0.6 zone, because of radius of curvature R reduces, air-flow curves sharp, so peel off along the entrance part 18b fillet airflow flowing of side plate 18, bias mainboard 19 sides can not be used substantial blade inlet width b effectively
1, become the reason that efficient reduces.
On the other hand, as radius of curvature R and blade inlet width dimensions b
1Ratio above 0.9 o'clock, because of the reduction volume of material increases, so become the boundary of processing, thereby produce at the front-end face of the entrance part 18b of side plate 18 and to cut off or machining accuracy is reduced, so must further process this entrance part 18b, because this processing,, reduce the noise cause of increased so become efficient because of air-flow is difficult to flow, produce sinuous flow and make along the entrance part 18b of side plate 18 peel off increase.Therefore, the radius of curvature R and the blade inlet width dimensions b of the fillet when meridian plane is observed the entrance part 18b of side plate 18
1Ratio (R/b
1), expectation is set in 0.6-0.9.
Flow path cross sectional area (the D of interior all sides of the blade 17 of centrifugal impeller 12
1B
1) with the flow path cross sectional area people (D of outer circumferential side
2B
2) influence the flow velocity of airflow flowing therebetween.Cause big deceleration to flow for unlikely, routine flowing path section (D of week in wishing
1B
1) with the flow path cross sectional area (D of outer circumferential side
2B
2) ratio (=D
1B
1/ D
2B
2) remain on below 0.74.
For miniaturization constitutes blower portion 1, suppress the height of centrifugal impeller 12.Yet,, be necessary to enlarge the width of blade 17 in order to ensure the flow of necessity.In the present invention, consider the condition that this is opposite, should guarantee the blade area of high-power peripheral part, suppress height (width dimensions of blade 17) again, thereby make the centrifugal impeller 12 of flat capable shape, so make the throat width size b of aforementioned blade 17
1With exit width size b
2Ratio (=b
1/ b
2) be below 2.0.
Use the blower portion 1 of the centrifugal impeller 12 of structure as previously mentioned, because of the deceleration regime that flows at entrance part good, so can raise the efficiency and reduce noise.That is to say the inlet area S of the inlet 18a that utilization forms on the central part of the side plate 18 of centrifugal impeller 12
0Compare S with the blade inlet area
1/ S
0Get the exit width size b of 1.0-1.4 scope, blade 17
2With the impeller outer diameter dimension D
2Ratio b
2/ D
2Get more than 0.7, the ratio (D of the flow path cross sectional area of the flow path cross sectional area of interior all sides and outer circumferential side
1B
1/ D
2B
2) get below 0.74 the throat width size b of blade 17
1Exit width size b with blade
2Ratio b
1/ b
2) be set in below 2.0, fillet radius R and the blade inlet width dimensions b of entrance part 18b
1Ratio R/b
1Be set in the 0.6-6.9 scope, like this, can confirm to keep well the efficient of blower portion 1.
According to foregoing result of study, can obtain inlet area S about centrifugal impeller 12
0With blade inlet area S
1And the fillet radius of curvature R of the entrance part 18b of side plate 18 and blade inlet width dimensions b
1The useful results of relation.Even by standard design or partial design change etc., also correspondingly luminous efficiency reduction and noise do not increase for centrifugal impeller 12.
Use the blower portion 1 of this flat centrifugal impeller 12, because of shortening axial length, so can make electric blower 909 and electric dust collector miniaturization.
Claims (10)
1. electric dust collector, comprise fan guard, suction port and electric blower, fan guard cover the centrifugal impeller be fixed on the motor rotation axis around, suction port is formed on the central part of described fan guard, the suction oral area of the upright installing of the central part of the side plate of electric blower and described centrifugal impeller connects, it is characterized in that, with the area S of the interconnected hypothesis annulus of front end of the center side of the close impeller of the blade of described centrifugal impeller
1Inlet area S with this centrifugal impeller
0Ratio S
1/ S
0Make 1.0-1.4.
2. electric dust collector as claimed in claim 1 is characterized in that, the outer circumferential side exit width size b of the blade of described centrifugal impeller
2With outside dimension D
2Ratio b
2/ D
2Be set in more than 0.07.
3. electric dust collector as claimed in claim 2 is characterized in that, the ratio of the flow path cross sectional area of interior all sides of the blade of described centrifugal impeller and the flow path cross sectional area of outer circumferential side is set in below 0.74.
4. electric dust collector as claimed in claim 2 is characterized in that, the throat width size b of the blade of described centrifugal impeller
1With exit width size b
2Ratio b
1/ b
2Be set in below 2.0.
5. electric dust collector as claimed in claim 2 is characterized in that, the suction oral area that forms on the side plate central part has fillet, the radius of curvature R of the described fillet when meridian plane is observed described centrifugal impeller and blade inlet width dimensions b
1Ratio R/b
1Be set in the 0.6-0.9 scope.
6. electric dust collector, comprise fan guard, suction port and electric blower, fan guard cover the centrifugal impeller be fixed on the motor rotation axis around, suction port is formed on the central part of described fan guard, the suction oral area of the upright installing of the central part of the side plate of electric blower and described centrifugal impeller connects, it is characterized in that, with the area S of the interconnected hypothesis annulus of front end of the center side of the close impeller of the blade of described centrifugal impeller
1Inlet area S with this centrifugal impeller
0Ratio S
1/ S
0Make 1.0-1.4, the outer circumferential side exit width size b of blade
2With outside dimension D
2Ratio b
2/ D
2More than 0.07, the ratio of the flow path cross sectional area of interior all sides of blade and the flow path cross sectional area of outer circumferential side is below 0.74, the throat width size b of blade
1With exit width size b
2Ratio b
1/ b
2Below 2.0, the radius of curvature R and the blade inlet width dimensions b of the fillet when meridian plane is observed the suction oral area that forms on the side plate central part
1Ratio R/b
1Be set in the 0.6-0.9 scope.
7. electric dust collector, be included in pack in the cabinet cylindraceous of an end opening rotor and stator and on described open end the motor of deployment end support, the centrifugal impeller of on the running shaft of the bearing support that runs through described end support, installing, the diffuser vane that between this centrifugal impeller and motor, is provided with, and the fan guard that covers them, to feed in the cabinet from the intakeport of described end support described motor will be cooled off from this centrifugal impeller air-flow that spues, it is characterized in that, the air-flow conductor that can justify the air-flow that guides described fan guard suction port is set suitablely, simultaneously with the blade of described centrifugal impeller area S near the interconnected hypothesis annulus of front end of the center side of impeller
1Inlet area S with this centrifugal impeller
0Ratio S
1/ S
0Make 1.0-1.4.
8. electric dust collector as claimed in claim 7 is characterized in that, with the outer circumferential side exit width size b of blade
2With outside dimension D
2Ratio b
2/ D
2More than 0.07, the ratio of the flow path cross sectional area of interior all sides of blade and the flow path cross sectional area of outer circumferential side is below 0.74, the throat width size b of blade
1With exit width size b
2Ratio b1/b
2Below 2.0, the radius of curvature R and the blade suction port width dimensions b of the fillet when meridian plane is observed the suction oral area that forms on the side plate central part
1Ratio R/b
1Be set in the 0.6-0.9 scope.
9. electric dust collector, comprise the dust precipitation chamber that is communicated on the suction port that connects flexible pipe, in the electric blower chamber at this dust precipitation chamber rear be arranged on electric blower in this electric blower chamber, this electric blower comprises the topped fan guard on every side that is fixed on the centrifugal impeller on the motor rotation axis, the suction oral area of the upright installing of the central part of the suction port of the central part of described fan guard and the side plate of described centrifugal impeller connects, it is characterized in that, with the blade of described centrifugal impeller area s near the interconnected hypothesis annulus of front end of the center side of impeller
1Inlet area S with this centrifugal impeller
0Ratio S
1/ S
0Make 1.0-1.4.
10. electric dust collector as claimed in claim 9 is characterized in that, described centrifugal impeller is with the outer circumferential side exit width size b of blade
2With outside dimension D
2Ratio b
2/ D
2Fix on more than 0.07, the ratio of the flow path cross sectional area of interior all sides of blade and the flow path cross sectional area of outer circumferential side fixes on below 0.74, the throat width size b of blade
1With exit width size b
2Ratio b
1/ b
2Fix on below 2.0 the radius of curvature R of the fillet when meridian plane is observed the suction oral area that forms on the side plate central part and the ratio R/b of blade inlet width dimensions b1
1Be set in the 0.6-0.9 scope.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP159405/1995 | 1995-06-26 | ||
| JP15940595A JPH0914192A (en) | 1995-06-26 | 1995-06-26 | Motor-driven blower and vacuum cleaner |
| JP159405/95 | 1995-06-26 | ||
| JP17885595 | 1995-07-14 | ||
| JP178855/95 | 1995-07-14 | ||
| JP178855/1995 | 1995-07-14 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96106924A Division CN1108138C (en) | 1995-06-26 | 1996-06-26 | Electric dust collector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1389174A CN1389174A (en) | 2003-01-08 |
| CN1200634C true CN1200634C (en) | 2005-05-11 |
Family
ID=26486218
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96106924A Expired - Fee Related CN1108138C (en) | 1995-06-26 | 1996-06-26 | Electric dust collector |
| CNB021066515A Expired - Fee Related CN1200634C (en) | 1995-06-26 | 2002-02-27 | Electric dust collector |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96106924A Expired - Fee Related CN1108138C (en) | 1995-06-26 | 1996-06-26 | Electric dust collector |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100409173B1 (en) |
| CN (2) | CN1108138C (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100437018B1 (en) * | 2001-08-29 | 2004-06-23 | 엘지전자 주식회사 | Centrifugal blower for vacuum cleaner |
| KR20010099247A (en) * | 2001-09-14 | 2001-11-09 | 김의숙 | Accident preventing System of inner tunnel using radically leakage coaxial cable |
| KR100445649B1 (en) * | 2002-01-03 | 2004-08-21 | 엘지전자 주식회사 | The motor for a cleaner |
| KR100483740B1 (en) * | 2002-05-31 | 2005-04-18 | 주식회사 케이티프리텔 | Repeater |
| JP4271204B2 (en) * | 2006-05-26 | 2009-06-03 | 株式会社東芝 | Electric vacuum cleaner |
| KR100740588B1 (en) * | 2006-08-29 | 2007-07-18 | 양영석 | Underground radio network integrated repeater system |
| CN101865145B (en) * | 2009-04-20 | 2012-09-19 | 日立空调·家用电器株式会社 | Electric blower, electric dust collector carrying the same and manufacturing method thereof |
| GB2513662B (en) * | 2013-05-03 | 2015-10-21 | Dyson Technology Ltd | Compressor flow path |
| JP6748842B2 (en) * | 2015-05-08 | 2020-09-02 | パナソニックＩｐマネジメント株式会社 | Electric blower air guide, electric blower, and vacuum cleaner |
| CN107280577B (en) * | 2016-03-31 | 2020-11-03 | 康塔有限公司 | Vacuum cleaner with a vacuum cleaner head |
| KR101842129B1 (en) * | 2016-05-17 | 2018-03-26 | 엘지전자 주식회사 | Cleaner |
| CN107061320B (en) | 2017-03-13 | 2019-04-02 | 美的集团股份有限公司 | Electric fan and dust catcher with it |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52150806A (en) * | 1976-06-09 | 1977-12-14 | Matsushita Electric Ind Co Ltd | Motor fan |
| JP2852106B2 (en) * | 1990-07-20 | 1999-01-27 | 株式会社日立製作所 | Vacuum cleaner and electric blower |
| JPH0560095A (en) * | 1991-08-28 | 1993-03-09 | Hitachi Ltd | Motor-driven blower |
| ZA927281B (en) * | 1991-10-14 | 1993-04-26 | Flamagas | Pocket lighter having a safety mechanism. |
| JPH0614856A (en) * | 1992-06-30 | 1994-01-25 | Hitachi Ltd | Vacuum cleaner |
| JP2633796B2 (en) * | 1993-07-26 | 1997-07-23 | 八洲電機株式会社 | Electric vacuum cleaner |
| GB9323784D0 (en) * | 1993-11-18 | 1994-01-05 | Numatic Int Ltd | Improvements in and relating to vacuum cleaners |
| KR970000580B1 (en) * | 1995-01-09 | 1997-01-14 | 엘지전자 주식회사 | Vacuum cleaner motor |
-
1996
- 1996-06-25 KR KR1019960023453A patent/KR100409173B1/en not_active IP Right Cessation
- 1996-06-26 CN CN96106924A patent/CN1108138C/en not_active Expired - Fee Related
-
2002
- 2002-02-27 CN CNB021066515A patent/CN1200634C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| KR970000161A (en) | 1997-01-21 |
| CN1108138C (en) | 2003-05-14 |
| CN1389174A (en) | 2003-01-08 |
| CN1157710A (en) | 1997-08-27 |
| KR100409173B1 (en) | 2004-03-26 |
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Granted publication date: 20050511 Termination date: 20150626 |
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