CN203743026U - Air supply device - Google Patents
Air supply device Download PDFInfo
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- CN203743026U CN203743026U CN201420058452.0U CN201420058452U CN203743026U CN 203743026 U CN203743026 U CN 203743026U CN 201420058452 U CN201420058452 U CN 201420058452U CN 203743026 U CN203743026 U CN 203743026U
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- radially inner
- impeller
- guide portion
- radial outside
- blast device
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Abstract
The utility model provides an air supply device. A swing head mechanism is not used, a centrifugal fan is used for sending out gas in the centrifugal direction in a complete cycle mode, the lower side of an impeller is configured with a guide portion which extends from a protection cover or a supporting column to the radial inner side, and the end of the radial inner side of the guide portion is arranged at the position closer to the radial inner side than the end of the radial outer side of a blade, that is, the axial lower side of the radial outer end of the blade is configured with at least one portion of the guide portion. Therefore, the airflow flowing towards the axial lower side from the blade can be restrained, as a result, air can be efficiently sent in the centrifugal direction through the impeller, and an air suction opening is separated from an air exhausting opening. Therefore, the air suction and exhausting efficiency is improved, due to the fact that a hand does not easily touch the internal impeller from the air suction opening, and the safety is excellent.
Description
Technical field
The utility model relates to a kind of blast device.
Background technique
In the past, known a kind of by making blade rotary produce the blast device such as electric fan, circulator, diffuser of air-flow.Especially to not using oscillating head mechanism just can propose various inventions at the all-round blast device of air-supply laterally.For example in Japanese Publication 2001-65492 communique, Japanese Publication 2006-63948 communique and Japanese Publication 2009-91980 communique, recorded this blast device.
The electric fan of recording in Japan Publication 2001-65492 communique makes to import to the air radial direction deflection towards fan by plectane portion in outer cover by the fan of rotation.Thus, not using oscillating head mechanism just can in the scope of 360 degree, send air stream (makes a summary, Fig. 1).But, in this communique, by make air and plectane portion collide to change the direction of air stream with axial flow fan.The loss of the air stream therefore, causing due to deflection is larger.
In the electric fan of recording, the running shaft of motor is vertically set in Japanese Publication 2006-63948 communique, and can rotates to 360 degree directions and blow and (make a summary, Fig. 1) by fan.But the electric fan of recording in this communique does not have wind-tunnel portion, a part that therefore causes the air accelerated by fan is leaked to upside or the downside of fan.And because intakeport is larger than fan, and intakeport is not separated with relief opening, therefore cause the efficiency of suction and discharge poor.
The electric fan of recording in Japan Publication 2009-91980 communique there is motor and is connected with motor and to 360 of centrifugal direction spend the impeller of blowing (claim 1, Fig. 1).But the electric fan of recording in this communique is from the above and below air amount of impeller, and to the surrounding of substantially horizontal blow (0049 section).Therefore the dust, falling from top is easily attached to impeller.And, likely make around dust diffuses to from impeller.And the housing section of supporting motor is configured near the intakeport of downside.Thus, cause declining from the gettering efficiency of below.
Model utility content
The purpose of this utility model is to provide a kind of oscillating head mechanism that do not use just can send gas and can be more in the past than the blast device that improved suction and discharge efficiency to centrifugal direction all-round.
According to the application's an exemplary mode of execution, blast device has: framework; And centrifugal cutter, centrifugal cutter has: impeller, and it can rotate centered by the central axis of above downward-extension; And motor, it makes vane rotary, and impeller has a plurality of blades along circumferential array, and framework has: protective housing, it surrounds impeller around; Upper plate portion, it covers the top of impeller; Pillar, it is tubular, and is extending vertically the position of side on the lower than protective housing; And guide portion, it is being expanded to radially inner side from protective housing or pillar position of side on the lower than impeller, guide portion has the through hole connecting vertically, when overlooking observation, through hole is configured in the position that comprises central axis, pillar has a plurality of intakepories that radially connect, protective housing has a plurality of relief openings that radially connect, the end of the radially inner side of guide portion is positioned at than the end of the radial outside of blade by the position of radially inner side, and a plurality of intakepories are positioned at than the guide portion position of side on the lower.
According to the application's an exemplary mode of execution, in blast device, the end of the radially inner side of guide portion is positioned at the position by radially inner side than the end of the radially inner side of the lower axial end of blade.
According to the application's an exemplary mode of execution, in blast device, impeller also has the downside support of the ring-type of the underpart that connects a plurality of blades.
According to the application's an exemplary mode of execution, in blast device, the end of the radially inner side of downside support is positioned at the position by radial outside than the end of the radially inner side of guide portion.
According to the application's an exemplary mode of execution, in blast device, guide portion has a plurality of auxiliary through hole connecting vertically, a plurality of auxiliary through holes are positioned at the position by radial outside than through hole, and the end of the radial outside of downside support is positioned at the position by radially inner side than the end of the radial outside of auxiliary through hole.
According to the application's an exemplary mode of execution, in blast device, the stationary part of motor is fixed on upper plate portion.
According to the application's an exemplary mode of execution, in blast device, the lead-in wire extending from motor extends to than the guide portion position of side on the lower along upper plate portion, protective housing and pillar.
According to the application's an exemplary mode of execution, in blast device, impeller also has: joint, and it is connected with the rotary part of motor; Upside support, it and connects the upper end portion of a plurality of blades in the form of a ring; And relay, it is connected with upside support joint, and the lower surface of upside support is positioned at than the position of the top side of lower surface of joint.
According to the application's an exemplary mode of execution, in blast device, the lower surface of relay is the plane of inclination along with highly rising towards radial outside.
According to the application's an exemplary mode of execution, in blast device, the lower ora terminalis of blade is along with tilting to upside or downside towards radial outside, and the upper surface of guide portion tilts along lower ora terminalis.
According to the application's an exemplary mode of execution, in blast device, guide portion also has in the wall portion of leaning on the position of radially inner side to make progress side-prominent than blade.
According to the application's an exemplary mode of execution, in blast device, protective housing has a plurality of current plates along circumferential array, relief opening is between adjacent described current plate, and the circumferential central authorities of the opening of the radial outside of relief opening are positioned at the position by sense of rotation the place ahead of impeller than the circumferential central authorities of the opening of the radially inner side of relief opening.
According to the application's an exemplary mode of execution, in blast device, relief opening, between the opening of radially inner side and the opening of radial outside, comprises the short part of distance ratio open between adjacent current plate.
According to the application's an exemplary mode of execution, in blast device, a plurality of current plates rotate centered by can distinguishing the spin axis of above downward-extension.
According to the application's an exemplary mode of execution, blast device also has the common rotating machinery that makes plural current plate linkage rotation.
According to the application's an exemplary mode of execution, in blast device, framework also has the baffle plate of circumferentially expanding on the radial outside edge of protective housing, and baffle plate is installed to be and can moves up and down with respect to framework.
According to the application's an exemplary mode of execution, in blast device, motor is Brushless DC motor.
According to the application's an exemplary mode of execution, in blast device, Brushless DC motor has and across fluid, in the mode that can rotate, connects the hydrodynamic pressure bearing of stationary part and rotary part.
According to the application's an exemplary mode of execution, in blast device, hydrodynamic pressure bearing has: sleeve, and it is cylindric, and extends vertically; Cap, the opening on the top of its sealing sleeve; Axle, its part is accommodated in the radially inner side of sleeve; Thrust plate, it is circular, and is fixed on axle; And fluid, it is present in sleeve and cap the two and axle and thrust plate between the two, sleeve has with the lower surface of thrust plate in axial opposed circumferentia, and the circumferentia of sleeve or the lower surface of thrust plate have makes fluid produce the axial hydrodynamic groove row of dynamic pressure.
According to the application's an exemplary mode of execution, in blast device, the stationary part of Brushless DC motor has stator iron core, the rotary part of Brushless DC motor has and the magnet of stator iron core at diametrically contraposition, when not rotating, the axial magnetic of magnet is centered close to than the position of side on the lower, the axial magnetic center of stator iron core.
According to the first exemplary model utility of the application, can not use oscillating head mechanism and use centrifugal cutter to centrifugal direction, to send gas all-round.Especially the end of the radially inner side of guide portion is positioned at the position by radially inner side than the end of the radial outside of blade.That is, at least a portion of the axial downside configuration guide portion of the radial outer end portion of blade.Therefore, suppressed to flow to from blade the air-flow of axial downside.Consequently, by impeller, can make gas to centrifugal direction, send efficiently.And intakeport and relief opening are separated.Thus, further improved the efficiency of suction and discharge.
And, than the impeller position configuration guide portion of side on the lower, than this guide portion position configuration intakeport of side more on the lower.Therefore, hand is difficult for encountering inner impeller from intakeport.Therefore, the blast device of the first model utility is also excellent in Security.
Accompanying drawing explanation
Fig. 1 is the External view of electric fan.
Fig. 2 is the longitudinal section of electric fan.
Fig. 3 is the sectional elevation of protective housing and impeller.
Fig. 4 is the sectional elevation of pillar.
Fig. 5 is the partial, longitudinal cross-sectional of electric fan.
Fig. 6 is the longitudinal section of sleeve, cap, axle and thrust plate.
Fig. 7 is the longitudinal section of sleeve.
Fig. 8 is the plan view of sleeve.
Fig. 9 is the worm's eye view of cap.
Figure 10 is the partial, longitudinal cross-sectional of motor.
Figure 11 is the partial cross sectional view of protective housing and impeller.
Figure 12 is the figure that the related current plate of variation and common rotating machinery are shown.
Figure 13 is the longitudinal section of the related blast device of variation.
Figure 14 is the longitudinal section of the related blast device of variation.
Figure 15 is the longitudinal section of the related blast device of variation.
Figure 16 is the longitudinal section of the related blast device of variation.
Figure 17 is the longitudinal section of the related blast device of other variation.
Embodiment
Below, with reference to the accompanying drawings exemplary mode of execution of the present utility model is described.In addition, in this application, respectively the parallel direction of the central axis with motor is called to " axially ", the direction of the central axis quadrature with motor is called to " radially ", the direction of the circular arc along centered by the central axis of motor is called to " circumferentially ".And in this application, take is axially above-below direction, and be upper the shape of each several part and position relationship to be described with respect to the above panel part side of impeller.But this above-below direction does not limit the related blast device of the utility model direction in use.
<1. the related blast device > of a mode of execution
<1-1. the overall structure > of electric fan
Fig. 1 is the External view of electric fan 1 of a mode of execution of the related blast device of the utility model.Fig. 2 is the longitudinal section of electric fan 1.The device that this electric fan 1 blows impeller 20 rotations for the power by motor 30 towards periphery.Electric fan 1 be for example positioned over family ground or table on user is enjoyed the cool.As depicted in figs. 1 and 2, the electric fan 1 of present embodiment has framework 10 and comprises impeller 20 and the centrifugal cutter 2 of motor 30.
Framework 10 has protective housing 11, upper plate portion 12, pillar 13 and guide portion 14.Protective housing 11 is positioned at the radial outside of impeller 20, and surrounds in the form of a ring impeller 20 around.Protective housing 11 prevents that user from contacting the impeller 20 in rotation.Fig. 3 is the sectional elevation of protective housing 11 and impeller 20.As shown in Figure 3, protective housing 11 has a plurality of current plates 15.A plurality of current plates 15 are along circumferentially with arranged spaced about equally.Between two adjacent current plates 15, there is the relief opening 43 of the slit-shaped radially connecting.That is, the protective housing in present embodiment 11 has a plurality of relief openings 43 along circumferential array.
In addition, the shape of current plate 15 also can differ be decided to be tabular.As long as can form a plurality of relief openings 43 between adjacent current plate 15, the shape of current plate 15 can be only also bar-shaped.
Turn back to Fig. 1 and Fig. 2.Upper plate portion 12 is positioned at the upside of impeller 20, and the upper end portion of sealing protective housing 11.That is, upper plate portion 12 covers the top of impeller 20.Because the dust falling from top is stopped by upper plate portion 12, be therefore difficult for being attached to impeller 20.Therefore, alleviated the burden of clean impeller 20.Especially the impeller 20 of centrifugal cutter 2 is because to compare the number of blade many with the impeller of axial fan, therefore not easy to clean.Therefore, can be attached to impeller 20 to alleviate clean burden be significant by suppressing dust.And, if suppressed dust, being attached to impeller 20, can also suppress around dust diffuses to from impeller 20.
Upper plate portion 12 in present embodiment is planar, and generally perpendicularly expands with respect to central axis 9.But upper plate portion 12 also can not necessarily be planar.For example, also upper plate portion can be made as to give prominence to upward hemispherical, and in the inner side of this upper plate portion, configure a part for motor 30 or motor 30.
Downside at protective housing 11 disposes the roughly pillar 13 of tubular.Pillar 13 extends vertically between the underpart of protective housing 11 and the installation surface of electric fan 1.Protective housing 11, upper plate portion 12, guide portion 14, motor 30 and impeller 20 are supported by pillar 13 directly or indirectly.Especially in the present embodiment, the external diameter of pillar 13 is larger than the external diameter of impeller 20.Therefore, the integral body of electric fan 1 is stably supported by pillar 13.Therefore, electric fan 1 overturning is possible little.And, can reduce the vibration that the impact due to the imbalance of impeller 20 etc. produces electric fan 1 when driving.
Fig. 4 is the sectional elevation of pillar 13.As shown in Figure 1, Figure 2 and shown in Fig. 4, pillar 13 has a plurality of intakepories 41.Each intakeport 41 radially connects pillar 13.A plurality of intakepories 41 are positioned at than guide portion 14 position of side on the lower.And a plurality of intakepories 41 edges are circumferentially to be spaced about equally.But the circumferential interval of a plurality of intakepories 41 also can be unequal.
Guide portion 14 is positioned at than impeller 20 side and than the position of a plurality of intakeport 41 top sides on the lower.In the example of Fig. 2, guide portion 14 is expanded towards radially inner side from the upper end portion of pillar 13.But guide portion 14 also can be expanded towards radially inner side from the underpart of protective housing 11.Guide portion 14 is circular, and has in the central through hole 42.Through hole 42 connects guide portion 14 vertically.And through hole 42 is configured in the position that comprises central axis 9 while overlooking.
Impeller 20 is configured in the upside of the radially inner side of protective housing 11, the downside of upper plate portion 12 and guide portion 14.Impeller 20 is supported to can be with respect to framework 10 rotations.Impeller 20 in present embodiment has a plurality of blades 21, downside support 22 and upside support 23.A plurality of blades 21 edges are circumferentially to be spaced about equally.But the circumferential interval of a plurality of blades 21 also can be unequal.
As shown in Figure 3, the impeller 20 of present embodiment is used each blades 21 along with towards radial outside and to the so-called turbofan of the rear bending of sense of rotation (direction of arrow in Fig. 3).If use turbofan, can be sent to farther place by wind.And, owing to having reduced the number of blade 21, therefore can reduce the noise that impeller 20 produces when driving.But, also can substitute turbofan and use each blade to the so-called Sirocco fan of the place ahead bending of sense of rotation.
Downside support 22 is the underpart of a plurality of blades 21 of circular connection.Upside support 23 is the upper end portion of a plurality of blades 21 of circular connection.A plurality of blades 21 extend vertically between downside support 22 and upside support 23.Thus, by thering is downside support 22 and upside support 23, improved the rigidity of a plurality of blades 21.
And impeller 20 has joint 24 and relay 25.Joint 24 is connected with the rotary part 32 of motor 30.The end of the radial outside of 25 pairs of joints 24 of relay is connected with the end of the radially inner side of upside support 23.As shown in Figure 2, the lower surface of upside support 23 is positioned at than the position of the top side of lower surface of joint 24.Therefore, can be at the radially inner side configuration motor 30 of blade 21, and lengthened blades 21 in the axial direction.
Motor 30 is for being provided for the mechanism of the power of rotation to impeller 20.In the present embodiment, motor 30 uses Brushless DC motor.Brushless DC motor is owing to can not producing because of the wearing and tearing of brush the degeneration of performance, therefore long than the brush motor life-span.And Brushless DC motor is easy to speed change and is easy to reduce power consumption than alternating current motor.And in the present embodiment, the stationary part 31 of motor 30 is fixed on upper plate portion 12.Therefore, can guarantee large gas flow path at the downside of motor 30.That is, the difficult obstruction of motor 30 flows to the air-flow of relief opening 43 by through hole 42 from intakeport 41.
As shown in Figure 2, electric fan 1 has lead-in wire 44 and circuit board 45.From the electric current of external power supply input by go between 44 and circuit board 45 be provided for motor 30.Circuit board 45 is fixed on the inner peripheral surface of pillar 13.Lead-in wire 44 is drawn from motor 30, and extends to than guide portion 14 circuit board 45 of side on the lower along upper plate portion 12, protective housing 11 and pillar 13.And lead-in wire 44 further extends to downside along pillar 13 from circuit board 45, and draws to outside near the underpart of pillar 13.In the electric fan 1 of present embodiment, as mentioned above, lead-in wire 44 and circuit board 45 configure not cross the mode of the air-flow in framework 10.Therefore, be difficult for to produce the loss of the air quantity causing due to lead-in wire 44 and circuit board 45.
<1-2. about motor >
Fig. 5 is near the partial, longitudinal cross-sectional of the electric fan 1 motor 30.As shown in Figure 5, motor 30 has stationary part 31 and rotary part 32.Stationary part 31 is relatively static with respect to upper plate portion 12.Rotary part 32 is supported to can be with respect to stationary part 31 rotations.
Stationary part 31 in present embodiment has bearing cage 33, stator 34, sleeve 35 and cap 36.
Bearing cage 33 is roughly cylindric outstanding in the surrounding of central axis 9 from upper plate portion 12 to downside.In the present embodiment, upper plate portion 12 is formed by a body component with bearing cage 33.But upper plate portion 12 can be also the parts of mutual split with bearing cage 33.
Stator 34 is positioned at the downside of upper plate portion 12 and the radial outside of bearing cage 33.Stator 34 has stator iron core 341 and a plurality of coil 342.Stator iron core 341 for example consists of stacked steel plate.Stator iron core 341 is fixed on the outer circumferential face of bearing cage 33.And stator iron core 341 has to the outstanding a plurality of teeth 343 of radial outside.Coil 342 forms by being wound in the wire of each tooth 343.Coil 342 is electrically connected to described lead-in wire 44.
Sleeve 35 is configured in the radially inner side of bearing cage 33.Sleeve 35 is roughly cylindric extension vertically.Axle 37 described later is inserted into the radially inner side of sleeve 35.The outer circumferential face of the inner peripheral surface of sleeve 35 and axle 37 is at diametrically contraposition.And sleeve 35 has the circumferentia 352 of expanding to radial outside from the upper end portion of inner peripheral surface.Circumferentia 352 is positioned at the downside of thrust plate 38 described later.
Cap 36 is roughly discoideus expansion in the direction with central axis 9 quadratures.Cap 36 is positioned at the upside of axle 37 described later and thrust plate 38.Cap 36 is fixed on the opening on 35 top of the upper end portion of sleeve 35 and sealing sleeve.The material of sleeve 35 and cap 36 is such as using the metals such as stainless steel or phosphor bronze.
Rotary part 32 in present embodiment has axle 37, thrust plate 38 and magnet 39.
Axle 37 extends in the axial direction along central axis 9.The material of axle 37 is such as using the metals such as stainless steel.A part for axle 37 is accommodated in the radially inner side of sleeve 35.The underpart of axle 37 is more side-prominent downwards than the lower surface of sleeve 35.And the underpart of axle 37 is connected with the joint 24 of impeller 20 by the connected element 26 being made of metal.
Thrust plate 38 is circular parts, and is fixed on the upper end portion of axle 37.The outer circumferential face of thrust plate 38 is positioned at the position by radial outside than the outer circumferential face of axle 37.The circumferentia 352 of the lower surface of thrust plate 38 and sleeve 35 is axially opposed.And the lower surface of the upper surface of thrust plate 38 and cap 36 is axially opposed.
Magnet 39 is positioned at the radial outside of stator 34.In the present embodiment, at the inner peripheral surface of relay 25, fix the yoke 391 of promising magnetic.And, at the inner peripheral surface of this yoke 391, be fixed with magnet 39.Magnet 39 in present embodiment is circular.The end face of the radial outside of the inner peripheral surface of magnet 39 and a plurality of tooth 343 is at diametrically contraposition.And, at the inner peripheral surface of magnet 39, along circumferential alternating magnetization, go out the N utmost point and the S utmost point.
In addition, also can substitute circular magnet 39 and use a plurality of magnet.While using a plurality of magnet, by a plurality of magnet in the mode of the N utmost point and S utmost point alternative arrangement along circumferential array.
<1-3. about hydrodynamic pressure bearing >
Fig. 6 is the longitudinal section of sleeve 35, cap 36, axle 37 and thrust plate 38.As shown in Figure 6, at sleeve 35 and cap 36 the two and axle 37 and thrust plate 38, there is the Lubricants 50 as fluid between the two.Lubricants 50 is for example used polyol-ester type oil or dibasic acid ester class oil.Stationary part 31 is connected in the mode that can rotate across Lubricants 50 with rotary part 32.That is, in the present embodiment, sleeve 35, cap 36, axle 37, thrust plate 38 and Lubricants 50 form hydrodynamic pressure bearing 5.
In the present embodiment, at sleeve 35 and cap 36 the two and axle 37 and thrust plate 38, be formed with continuous bag-shaped gap between the two.And, in this gap, maintain Lubricants 50.Lubricants 50 has single liquid level 51 near the underpart of the inner peripheral surface 351 of sleeve 35 and between the outer circumferential face 371 of axle 37.Near liquid level 51, the spaced radial between the inner peripheral surface 351 of sleeve 35 and the outer circumferential face 371 of axle 37 is along with downward and gradually expanding.Therefore, near the Lubricants 50 liquid level 51 is drawn towards upside by surface tension.Thus, having suppressed Lubricants 50 leaks from sleeve 35 to downside.
Fig. 7 is the longitudinal section of sleeve 35.As shown in Figure 7, on the inner peripheral surface 351 of sleeve 35, lambdoid radial dynamic pressure groove row 52 are set to upper and lower 2 layers.When electric fan 1 drives, axle 37 with respect to sleeve 35 to a direction rotation.Now, by radial dynamic pressure groove row 52, the Lubricants 50 that makes to be present between sleeve 35 and axle 37 produces dynamic pressure.Axle 37 is radially being supported with respect to sleeve 35 by this dynamic pressure.That is, in the present embodiment, as the inner peripheral surface 351 of the sleeve 35 of stationary axle bearing surface, as the outer circumferential face 371 of the axle 37 of running shaft bearing surface and be present in inner peripheral surface 351 and outer circumferential face 371 between Lubricants 50 form radial bearing portions.
In addition, radial dynamic pressure groove row 52 are arranged on any one face in the inner peripheral surface 351 of sleeve 35 and the outer circumferential face 371 of axle 37.
Fig. 8 is the plan view of sleeve 35.As shown in Figure 8, the circumferentia 352 at sleeve 35 is provided with lambdoid the first axial hydrodynamic groove row 53.Fig. 9 is the worm's eye view of cap 36.As shown in Figure 9, the lower surface 361 at cap 36 is provided with lambdoid the second axial hydrodynamic groove row 54.When electric fan 1 drives, thrust plate 38 with respect to sleeve 35 and cap 36 to a direction rotation.Now, by the first axial hydrodynamic groove row 53 and the second axial hydrodynamic groove row 54, make Lubricants 50 produce dynamic pressure.Thrust plate 38 is axially being supported with respect to sleeve 35 and cap 36 by this dynamic pressure.; in the present embodiment, by the circumferentia 352 of the sleeve 35 as stationary axle bearing surface and the lower surface of cap 36 361 the two, as the lower surface 381 of the thrust plate 38 of running shaft bearing surface and upper surface 382 the two and be present in the above two with after Lubricants 50 between the two form cod portion.
In addition, the first axial hydrodynamic groove row 53 are arranged on any one face in the circumferentia 352 of sleeve 35 and the lower surface 381 of thrust plate 38.And the second axial hydrodynamic groove row 54 are arranged on any one face in the lower surface 361 of cap 36 and the upper surface 382 of thrust plate 38.And the shape of axial hydrodynamic groove row also can be for spiral-shaped.
If use hydrodynamic pressure bearing 5, can suppress by the effectiveness in vibration suppression of Lubricants 50 vibration of motor 30.Therefore, compare with using the situation of the gear mechanism of other modes such as ball bearing or sliding bearing, can reduce the noise of electric fan 1 when driving.And, the vibration and the impact that in the time of can also reducing carrying, are subject to.
Especially in the present embodiment, in hydrodynamic pressure bearing 5, when electric fan 1 drives, between the circumferentia 352 of sleeve 35 and the lower surface 381 of thrust plate 38, make Lubricants 50 produce dynamic pressure.Thus, make the lower surface 381 of thrust plate 38 with respect to circumferentia 352 a little floating of sleeve 35.Consequently, can reduce the friction between sleeve 35 and thrust plate 38, thereby rotary part 32 is rotated efficiently.
The partial, longitudinal cross-sectional of Figure 10 motor 30 when not rotating.As shown in figure 10, when not rotating, the axial magnetic center 46 of magnet 39 is positioned at than the position of side on the lower, the axial magnetic center 47 of stator iron core 341.Therefore,, by the magnetic attraction between magnet 39 and stator iron core 341, make magnet 39 be subject to attraction force upwards.Consequently, rotary part 32 is applied to biasing force upwards.Thus, when electric fan 1 starts to drive, make rotary part 32 be easy to floating.Therefore, can more successfully start the driving of electric fan 1.
In addition, also can to rotary part 32, apply biasing force upwards with additive method.For example, also can configure magnetic at the lower surface of upper plate portion 12, and by the magnetic attraction between this magnetic and magnet 39, rotary part 32 be applied to biasing force upwards.
<1-4. the action > of fan
In described electric fan 1, when from going between 44 while providing driving current to coil 342, can produce magnetic fluxs at a plurality of teeth 343.And the interaction by the magnetic flux between tooth 343 and magnet 39 produces circumferential torque.Consequently, rotary part 32 rotates centered by central axis 9 with respect to stationary part 31.Impeller 20 is rotation centered by central axis 9 together with rotary part 32.
When impeller 20 rotation, as represented with thick dashed line in Fig. 2, gas attracted to the inside of pillar 13 from the outside of pillar 13 by intakeport 41.And this gas is sent to the space of the radially inner side of protective housing 11 by through hole 42.Then, gas is accelerated by impeller 20, and sends gas towards centrifugal direction.Afterwards, this gas is discharged to the space of the radial outside of protective housing 11 by a plurality of relief openings 43.Thus, this electric fan 1 can not used oscillating head mechanism and use centrifugal cutter 2 to centrifugal direction, to send gas all-round.
At this, as shown in Figure 2, the end of the radially inner side of guide portion 14 is positioned at the position by radially inner side than the end of the radial outside of blade 21.That is, direction outer end, the footpath of blade 21 axially below configure at least a portion of guide portion 14.Therefore, can suppress from the air-flow of blade 21 side flow towards axially.Consequently, by impeller 20, can to centrifugal direction, send gas efficiently.
Especially in the present embodiment, the end of the radially inner side of guide portion 14 is positioned at the position by radially inner side than the end of the radially inner side of the lower axial end of blade 21.That is, the end of the radially inner side of the lower axial end of blade 21 axially below configure at least a portion of guide portion 14.Therefore, can further suppress from the air-flow of blade 21 side flow towards axially.Consequently, by impeller 20, can to centrifugal direction, send gas more efficiently.And there is not blade 21 in space directly over through hole 42.Therefore, be difficult for producing from blade 21 towards the mobile air-flow of through hole 42.Therefore, can be suppressed near the wind conflict turbulization because of both direction of through hole 42.Therefore, can reduce the noise that electric fan 1 produces when driving.
And in this electric fan 1, intakeport 41 and relief opening 43 configure up and down across interval.That is, intakeport 41 is separated with relief opening 43.Therefore, be difficult for producing so-called " air ring " that the gas of discharging from relief opening 43 attracted to intakeport 41 immediately.Therefore, can carry out more efficiently air-breathing and exhaust.
And, in this electric fan 1, than the impeller 20 position configuration guide portion 14 of side on the lower, than this guide portion 14 position configuration intakeport 41 of side more on the lower.Therefore, hand is difficult for encountering inner impeller 20 from intakeport 41.Therefore, this electric fan 1 is also excellent in Security.
And, in this electric fan 1, at the downside of a plurality of blades 21, configure the downside support 22 of ring-type.Therefore, can suppress from blade 21 towards the air-flow of side flow.Therefore, can to centrifugal direction, send gas more efficiently.And, in this electric fan 1, at the upside of a plurality of blades 21, configure the upside support 23 of ring-type.Therefore, can suppress from blade 21 towards the air-flow of side flow.Therefore, can to centrifugal direction, send gas more efficiently.Consequently, wind can be sent to farther place.
And in this electric fan 1, the end of the radially inner side of downside support 22 is positioned at the position by radial outside than the end of the radially inner side of guide portion 14.Therefore the gas that, has passed through through hole 42 can not stopped by downside support 22 space of the radially inner side that is sent to blade 21.Thus, further improved the efficiency of suction and discharge.
And in this electric fan 1, the end of the radially inner side of blade 21 is positioned at the position by radial outside than the end of the radially inner side of downside support 22.Therefore, the space of the radially inner side of blade 21 is large, and in the space of the radially inner side of blade 21, is difficult for producing the turbulent flow of gas.Therefore, can further reduce the noise that electric fan 1 produces when driving.
Figure 11 is the partial cross sectional view of protective housing 11 and impeller 20.As shown in figure 11, between a plurality of current plates 15 of protective housing 11, there is relief opening 43.A plurality of current plates 15 in present embodiment respectively with respect to radial skew extend.Specifically, the end of the radial outside of current plate 15 is positioned at the position by the sense of rotation front side of impeller 20 than the end of radially inner side.Therefore, each relief opening 43 between the opening 431 of radially inner side and the opening 432 of radial outside with respect to radial skew be communicated with.That is, the circumferential central authorities of the opening 432 of radial outside are positioned at the position by sense of rotation the place ahead of impeller 20 than the circumferential central authorities of the opening of radially inner side 431.The direction of the gas accelerating by impeller 20 thus, (direction of the dotted arrow in Figure 11) approaches with the direction of relief opening 43.Therefore, the loss of the air quantity at relief opening 43 places can be reduced, thereby exhaust can be successfully carried out.
And as shown in figure 11, each current plate 15 is the shape that its width shrinks towards radial outside and after first broadening along with the end from radially inner side again.Therefore, the distance d between adjacent current plate 15 is along with the opening 431 from radially inner side increases after first diminishing towards the opening 432 of radial outside again.That is, each relief opening 43 comprises the distance d part shorter than these openings 431,432 between adjacent current plate 15 between the opening 431 of radially inner side and the opening 432 of radial outside.If be made as this shape, can reduce the turbulent flow of the gas of relief opening 43 vicinity.Therefore, can further reduce the noise that electric fan 1 produces when driving.
And a plurality of current plates 15 in present embodiment can be distinguished rotation centered by the spin axis 151 of above downward-extension.Therefore,, as represented with two dot and dash line in Figure 11, by making a part of current plate 15 rotations, can close a part of relief opening 43, or regulate the aperture of relief opening 43.Thus, can be in each position of the surrounding of electric fan 1, adjust arbitrarily the intensity with wind that has or not of wind.
<2. variation >
Above exemplary mode of execution of the present utility model is illustrated, but the utility model is not limited to described mode of execution.
Figure 12 illustrates the related a part of current plate 15A of a variation and the figure of the common rotating machinery 16A that is connected with these current plates 15A.In the example of Figure 12, with respect to plural current plate 15A, be connected with a common rotating machinery 16A.If make the handle 161A rotation of common rotating machinery 16A, the plural current plate 15A being connected with common rotating machinery 16A is rotated in linkage.Thus, can easily make plural current plate 15A rotation.Therefore, can be easily in the surrounding of electric fan, by region, adjust the intensity with wind that has or not of wind.
Figure 13 is the longitudinal section of the related electric fan 1B of other variation.In the example of Figure 13, the lower ora terminalis of blade 21B is along with rolling tiltedly downwards towards radial outside.And, the upper surface of guide portion 14B also along the lower ora terminalis of blade 21B along with rolling tiltedly downwards towards radial outside.Thus, can reduce the space between the lower ora terminalis of blade 21B and the upper surface of guide portion 14B.Therefore, can suppress gas between the lower ora terminalis of blade 21B and the upper surface of guide portion 14B to radially inner side adverse current.Consequently, further improved the exhaust efficiency of electric fan 1B.
And the guide portion 14B in Figure 13 has the 141B of wall portion that makes progress side-prominent from the end of radially inner side.The 141B of wall portion is positioned at the position by radially inner side than blade 21B.Thus, can further suppress gas from blade 21B the space between ora terminalis and the upper surface of guide portion 14B to through hole 42B side flow.Therefore, can further suppress gas between the lower ora terminalis of blade 21B and the upper surface of guide portion 14B to radially inner side adverse current.Consequently, further improved the exhaust efficiency of electric fan 1B.
Figure 14 is the longitudinal section of the related electric fan 1C of other variation.In the example of Figure 14, the lower ora terminalis of blade 21C is along with upwards rolling tiltedly towards radial outside.And the upper surface of guide portion 14C also rolls oblique along the lower ora terminalis of blade 21C along with making progress towards radial outside.Thus, can reduce the space between the lower ora terminalis of blade 21C and the upper surface of guide portion 14C.Therefore, can suppress gas between the lower ora terminalis of blade 21C and the upper surface of guide portion 14C to radially inner side adverse current.Consequently, further improved the exhaust efficiency of electric fan 1C.
And the guide portion 14C in Figure 14 has the 141C of wall portion that makes progress side-prominent from the end of radially inner side.The 141C of wall portion is positioned at the position by radially inner side than blade 21C.Thus, can further suppress gas from blade 21C the space between ora terminalis and the upper surface of guide portion 14C to through hole 42C side flow.Therefore, can further suppress gas between the lower ora terminalis of blade 21C and the upper surface of guide portion 14C to radially inner side adverse current.Consequently, further improved the exhaust efficiency of electric fan 1C.
In addition, also can be by the equal horizontal arrangement of upper surface of the lower ora terminalis of blade and guide portion, and by the position of radially inner side, the wall portion that makes progress side-prominent from guide portion is being set than this blade.
Figure 15 is the longitudinal section of the related electric fan 1D of other variation.Electric fan 1D in Figure 15 has the baffle plate 17D of a part of covered protection cover 11D.Baffle plate 17D expands along circumferential at the radial outside of protective housing 11D.Baffle plate 17D, also can be for circular both overlook while observing can be for circular-arc.And baffle plate 17D is installed to be with respect to framework 10D and can moves up and down.When making the downward side shifting of baffle plate 17D, relief opening 43D expands.And when making baffle plate 17D make progress side shifting, relief opening 43D narrows down.If relief opening 43D narrows down, the air quantity of the per unit area of the wind of the top of baffle plate 17D increases.Therefore, can make the flow velocity of wind uprise, and wind can be sent to farther place.
Figure 16 is the longitudinal section of the related electric fan 1E of other variation.In the example of Figure 16, the relay 25E of impeller 20E and upside support 23E are the shape of the deflection that is applicable to wind.Specifically, the lower surface 231E of the lower surface 251E of relay 25E and upside support 23E becomes the plane of inclination of rising along with towards radial outside and highly.Therefore the gas that, has passed through through hole 42E is along these plane of inclination successfully to radial outside deflection.Consequently, further improved the efficiency of the suction and discharge of electric fan 1E.
Figure 17 is the longitudinal section of the related electric fan 1F of other variation.The guide portion 14F of Figure 17 has a plurality of auxiliary through hole 48F.Each auxiliary through hole 48F connects guide portion 14F vertically.And a plurality of auxiliary through hole 48F are leaning on the position of radial outside along circumferential array than through hole 42F.Thus, the gas attracting from intakeport 41F not only, by through hole 42F, is also sent to impeller 20F side by a plurality of auxiliary through hole 48F.Therefore can provide more gas to impeller 20F.Consequently, can increase the air quantity of electric fan 1F.
Now, in the situation that impeller 20F has downside support 22F, in order not make downside support 22F stop the mobile next air-flow via auxiliary through hole 48F, and be advisable by the position of radially inner side the end of the radial outside of downside support 22F is configured in than the end of the radial outside of auxiliary through hole 48F.
And as shown in figure 17, a plurality of auxiliary through hole 48F preferred disposition are at the axial downside of the end of the radial outside of blade 21F.That is, the position of radial outside is leaned in the end of the radial outside of auxiliary through hole 48F at the center than between the end of the radial outside of blade 21F and the end of inner side.At this, near the end compared with the radially inner side of blade 21F, near the end of the radial outside of blade 21F, gas more accelerates to centrifugal direction, thereby makes the velocity component of centrifugal direction become large.Therefore,, even if a plurality of auxiliary through hole 48F are set, be also difficult for producing the air-flow from blade 21F to auxiliary through hole 48F side flow.Therefore,, near auxiliary through hole 48F, due to the wind conflict of both direction, the possibility of turbulization is very little.
Electric fan 1 in above-mentioned mode of execution has been used the so-called external rotor type motor at the radial outside distributed magnet 39 of stator 34.But blast device of the present utility model also can be used the so-called inner-rotor type motor at the radially inner side distributed magnet of stator.
And the electric fan 1 in above-mentioned mode of execution has been used sleeve 35 to belong to the rotary-type motor of so-called axle that stationary part 31, axle 37 belong to rotary part 32.But blast device of the present utility model also can be used axle to belong to the so-called fixed shaft type motor that stationary part, sleeve belong to rotary part.
And blast device of the present utility model also can not necessarily be used hydrodynamic pressure bearing.For example, also can substitution fluid hydraulic bearing and use ball bearing or sliding bearing.And even if use hydrodynamic pressure bearing, the structure of hydrodynamic pressure bearing can be not identical with described mode of execution yet.
And blast device of the present utility model also can differ and be decided to be the electric fan for enjoying the cool.For example, also can filter be installed in the inside of framework and be used as air cleaner.And, also can be used as spicery diffuser at the internal configurations aromatizer of framework.And, also can be used as heater or cooler in the inside of framework set temperature adjusting portion.And, also can be used as expelling parasite utensil at the internal configurations insecticide of framework.
And blast device of the present utility model also can configure upside down with above-mentioned mode of execution.That is, also can be configured to upper plate portion and become downside with respect to impeller.
And the shape of the detailed part of each parts of formation blast device also can be different from each shape shown in the drawings of the application.For example, the profile of pillar can be also polygonal.And each lower surface of the joint of impeller, relay and upper support portion also can be positioned at sustained height place.
And each key element occurring in above-mentioned mode of execution and variation, in not producing the scope of contradiction, also can suitably combine.
The utility model can be used in the blast devices such as electric fan, air cleaner and diffuser.
Claims (20)
1. a blast device, it has:
Framework; And
Centrifugal cutter,
Described centrifugal cutter has:
Impeller, it can rotate centered by the central axis of above downward-extension; And
Motor, it makes described vane rotary,
Described impeller has a plurality of blades along circumferential array,
Described framework has:
Protective housing, it surrounds described impeller around;
Upper plate portion, it covers the top of described impeller;
Pillar, it is tubular, and is extending vertically the position of side on the lower than described protective housing; And
Guide portion, it is being expanded to radially inner side from described protective housing or described pillar position of side on the lower than described impeller,
Described guide portion has the through hole connecting vertically,
When overlooking observation, described through hole is configured in the position that comprises central axis,
Described pillar has a plurality of intakepories that radially connect,
Described protective housing has a plurality of relief openings that radially connect,
The end of the radially inner side of described guide portion is positioned at the position by radially inner side than the end of the radial outside of described blade,
Described blast device is characterised in that,
Described a plurality of intakeport is positioned at than the described guide portion position of side on the lower.
2. blast device according to claim 1, is characterized in that,
The end of the radially inner side of described guide portion is positioned at the position by radially inner side than the end of the radially inner side of the lower axial end of described blade.
3. blast device according to claim 1, is characterized in that,
Described impeller also has the downside support of the ring-type of the underpart that connects described a plurality of blades.
4. blast device according to claim 3, is characterized in that,
The end of the radially inner side of described downside support is positioned at the position by radial outside than the end of the radially inner side of described guide portion.
5. blast device according to claim 3, is characterized in that,
Described guide portion has a plurality of auxiliary through hole connecting vertically,
Described a plurality of auxiliary through hole is positioned at the position by radial outside than described through hole,
The end of the radial outside of described downside support is positioned at the position by radially inner side than the end of the radial outside of described auxiliary through hole.
6. blast device according to claim 1, is characterized in that,
The stationary part of described motor is fixed on described upper plate portion.
7. blast device according to claim 6, is characterized in that,
The lead-in wire extending from described motor extends to than the described guide portion position of side on the lower along described upper plate portion, described protective housing and described pillar.
8. blast device according to claim 6, is characterized in that,
Described impeller also has:
Joint, it is connected with the rotary part of described motor;
Upside support, it and connects the upper end portion of described a plurality of blades in the form of a ring; And
Relay, it is connected with described upside support described joint,
The lower surface of described upside support is positioned at than the position of the top side of lower surface of described joint.
9. blast device according to claim 8, is characterized in that,
The lower surface of described relay is the plane of inclination along with highly rising towards radial outside.
10. blast device according to claim 1, is characterized in that,
The lower ora terminalis of described blade is along with tilting to upside or downside towards radial outside,
The upper surface of described guide portion tilts along described lower ora terminalis.
11. blast devices according to claim 1, is characterized in that,
Described guide portion also has in the wall portion of leaning on the position of radially inner side to make progress side-prominent than described blade.
12. blast devices according to claim 1, is characterized in that,
Described protective housing has a plurality of current plates along circumferential array,
Described relief opening between adjacent described current plate,
The circumferential central authorities of the opening of the radial outside of described relief opening are positioned at the position by sense of rotation the place ahead of described impeller than the circumferential central authorities of the opening of the radially inner side of described relief opening.
13. blast devices according to claim 12, is characterized in that,
Described relief opening, between the opening of radially inner side and the opening of radial outside, comprises the distance part shorter than described opening between adjacent described current plate.
14. blast devices according to claim 12, is characterized in that,
Described a plurality of current plate rotates centered by can distinguishing the spin axis of above downward-extension.
15. blast devices according to claim 14, is characterized in that,
Described blast device also has the common rotating machinery that makes plural described current plate linkage rotation.
16. blast devices according to claim 1, is characterized in that,
Described framework also has the baffle plate of circumferentially expanding on the radial outside edge of described protective housing,
Described baffle plate is installed to be and can moves up and down with respect to described framework.
17. blast devices according to claim 16, is characterized in that,
Described motor is Brushless DC motor.
18. blast devices according to claim 17, is characterized in that,
Described Brushless DC motor has and across fluid, in the mode that can rotate, connects the hydrodynamic pressure bearing of stationary part and rotary part.
19. blast devices according to claim 18, is characterized in that,
Described hydrodynamic pressure bearing has:
Sleeve, it is cylindric, and extends vertically;
Cap, it seals the opening on the top of described sleeve;
Axle, its part is accommodated in the radially inner side of described sleeve;
Thrust plate, it is circular, and is fixed on described axle; And
Fluid, it is present in described sleeve and described cap the two and described axle and described thrust plate between the two,
Described sleeve has with the lower surface of described thrust plate in axial opposed circumferentia,
The described circumferentia of described sleeve or the lower surface of described thrust plate have makes described fluid produce the axial hydrodynamic groove row of dynamic pressure.
20. blast devices according to claim 17, is characterized in that,
The stationary part of described Brushless DC motor has stator iron core,
The rotary part of described Brushless DC motor has and the magnet of described stator iron core at diametrically contraposition,
When not rotating, the axial magnetic of described magnet is centered close to than the position of side on the lower, the axial magnetic center of described stator iron core.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013-117468 | 2013-06-04 | ||
| JP2013117468A JP2014234782A (en) | 2013-06-04 | 2013-06-04 | Blower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203743026U true CN203743026U (en) | 2014-07-30 |
Family
ID=51342834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420058452.0U Expired - Fee Related CN203743026U (en) | 2013-06-04 | 2014-02-07 | Air supply device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2014234782A (en) |
| CN (1) | CN203743026U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106288283A (en) * | 2016-10-08 | 2017-01-04 | 珠海格力电器股份有限公司 | Air conditioning exhausting parts, air-conditioner and control method thereof |
| CN108700091A (en) * | 2016-02-22 | 2018-10-23 | 株式会社荏原制作所 | Fan assembly |
| CN111384798A (en) * | 2018-12-26 | 2020-07-07 | 本田技研工业株式会社 | Rotating electrical machine |
| TWI699960B (en) * | 2017-12-19 | 2020-07-21 | 蕭進興 | The improvement of brushless motor structure of range hood wind wheel |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018155188A (en) * | 2017-03-17 | 2018-10-04 | ミネベアミツミ株式会社 | Centrifugal fan |
| JP6964221B2 (en) * | 2017-12-19 | 2021-11-10 | パナソニックＩｐマネジメント株式会社 | Blower |
| JP7106886B2 (en) * | 2018-02-21 | 2022-07-27 | 日本電産株式会社 | Fan and mask device |
| CN108825539A (en) * | 2018-08-16 | 2018-11-16 | 袁毛毛 | A kind of bladeless fan with purification function |
| CN112945500B (en) * | 2021-02-02 | 2023-06-09 | 中国空气动力研究与发展中心高速空气动力研究所 | Simulation measurement device and method for influence of transonic wind tunnel blocking degree |
-
2013
- 2013-06-04 JP JP2013117468A patent/JP2014234782A/en active Pending
-
2014
- 2014-02-07 CN CN201420058452.0U patent/CN203743026U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108700091A (en) * | 2016-02-22 | 2018-10-23 | 株式会社荏原制作所 | Fan assembly |
| CN108700091B (en) * | 2016-02-22 | 2020-06-12 | 株式会社荏原制作所 | Fan device |
| CN106288283A (en) * | 2016-10-08 | 2017-01-04 | 珠海格力电器股份有限公司 | Air conditioning exhausting parts, air-conditioner and control method thereof |
| TWI699960B (en) * | 2017-12-19 | 2020-07-21 | 蕭進興 | The improvement of brushless motor structure of range hood wind wheel |
| CN111384798A (en) * | 2018-12-26 | 2020-07-07 | 本田技研工业株式会社 | Rotating electrical machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2014234782A (en) | 2014-12-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140730 Termination date: 20190207 |
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| CF01 | Termination of patent right due to non-payment of annual fee |