CN203962486U - Air Blast fan and electronic equipment - Google Patents

Abstract

The utility model relates to a kind of Air Blast fan and electronic equipment, and this Air Blast fan is centrifugal cutter, and at least a portion of each of multiple blades of impeller portion is positioned at the top of stator.In the case of there is the side wall portion of the periphery of surrounding impeller portion and be positioned at impeller portion above top plate portion, base plate, side wall portion and top plate portion form wind-tunnel portion and are positioned at the air blowing opening of the side of impeller portion.Wind-tunnel portion between the periphery of stator and side wall portion along circumferentially expansion.At least a portion of circuit board is positioned at wind-tunnel portion and is positioned in base plate, and in wind-tunnel portion, the many lighting outlets of drawing from stator are connected with circuit board.

Description

Air Blast fan and electronic equipment

Technical field

The utility model relates to a kind of inner-rotor type Air Blast fan.

Background technique

In recent years, the electronic equipment such as notebook type PC, Desktop PC is to the future development of slimming.And along with the development of high performance, the heating problem in electronic equipment highlights.In slim electronic equipment, configured a large amount of electronic components, the space that air occupies is little.Therefore,, even if exist in the case of the element heating in electronic equipment is less, can not ignore the situation of the temperature rise in electronic equipment.Thus, with the object that is cooled to of electronic equipment internal, Air Blast fan is configured in electronic equipment.

In slim electronic equipment, dispose centrifugal cutter as Air Blast fan.And, the air quantity that requires Air Blast fan to acquire a certain degree.As this Air Blast fan, for example, have disclosed at TOHKEMY 2013-130094 communique or 2001-241395 communique.The centrifugal cutter that Japan's Publication is recorded for No. 2013-130094 is external rotor type.The electronic component arrangements portion of substrate is configured in the region being surrounded by gap enlargement portion, impeller and relief opening.The fan assembly being recorded in Japanese Publication JP 2001-241395 communique is also external rotor type.

But in external rotor type Air Blast fan, rotary part increases, cause miniaturization to become difficulty.On the other hand, adopt inner-rotor type if want miniaturization, most constituting components of motor part are overlapping in the axial direction, thereby slimming difficulty.Consequently can not in realizing slimming, guarantee air quantity.

Model utility content

The utility model is to guarantee that in by Air Blast fan slimming air quantity is as object.

First aspect shown in the utility model is a kind of Air Blast fan, and it possesses stationary part, gear mechanism and rotary part.Rotary part is supported to and can centered by the central axis towards above-below direction, rotates with respect to stationary part by means of gear mechanism.Stationary part possesses base plate, stator and circuit board.Base plate is to the Directional Extension away from central axis.Stator is positioned in base plate and in the form of a ring.Rotary part possesses rotor magnet, rotor hub portion and impeller portion.Rotor magnet is positioned at the radially inner side of stator and in the form of a ring.Rotor magnet is direct or be indirectly fixed on rotor hub portion by other parts.Rotor hub portion is fixed in impeller portion.Impeller portion has the multiple blades along circumferential array.At least a portion of each of multiple blades is positioned at the top of stator.In the case of exist surround impeller portion periphery side wall portion and be positioned at impeller portion above top plate portion, base plate and side wall portion and top plate portion have formed wind-tunnel portion and air blowing opening jointly, in this wind-tunnel portion, make air along circumferential flow by impeller portion, this air blowing opening is positioned at the side of impeller portion.At least one party in top plate portion and base plate has suction port.Wind-tunnel portion is positioned between the periphery and side wall portion of stator.Wind-tunnel portion is the space that the upper surface of base plate is circumferentially expanded and arrived below axially on edge.At least a portion of circuit board is positioned at wind-tunnel portion and is positioned in base plate.In wind-tunnel portion, multiple lighting outlets of drawing from stator are connected with circuit board.

According to the first aspect shown in the utility model, can in making Air Blast fan slimming, guarantee air quantity.

On the basis of the Air Blast fan that the second aspect shown in the utility model is recorded in first aspect, it is characterized in that, the link position between multiple lighting outlets and circuit board than above-mentioned impeller portion by radial outside.

On the basis of the Air Blast fan that the third aspect shown in the utility model is recorded in second aspect, it is characterized in that, multiple lighting outlets are connected by scolding tin with described circuit board.

On the basis of the Air Blast fan that the fourth aspect shown in the utility model is recorded in first aspect, it is characterized in that, foregoing circuit plate comprises the curved part extending along above-mentioned wind-tunnel portion.

On the basis of the Air Blast fan that the 5th aspect shown in the utility model is recorded in fourth aspect, it is characterized in that, in the time overlooking above-mentioned curved part, above-mentioned curved part possesses along with towards air supply direction upstream and the wedge-shaped part that the radial width of above-mentioned curved part reduces gradually.

On the basis of the Air Blast fan that the 6th aspect shown in the utility model is recorded in fourth aspect, it is characterized in that, in the time overlooking above-mentioned curved part, the edge of air supply direction upstream side is arcuation.

The 7th aspect shown in the utility model is on the basis of the Air Blast fan of recording aspect the 6th, it is characterized in that, in the time overlooking above-mentioned curved part, above-mentioned curved part possesses along with towards air supply direction upstream and the wedge-shaped part that the radial width of above-mentioned curved part reduces gradually.

On the basis of the Air Blast fan that the eight aspect shown in the utility model is recorded in fourth aspect, it is characterized in that, the link position between above-mentioned multiple lighting outlets and foregoing circuit plate is positioned at the radially central authorities of above-mentioned curved part or is positioned at specific diameter to central authorities position in the outer part.

On the basis of the Air Blast fan that any one party face of the 9th aspect shown in the utility model in first aspect to the eight aspect recorded, it is characterized in that, above-mentioned base plate comprises stator holding part, described stator holding part is outstanding upward from the upper surface of above-mentioned base plate, and be the ring-type centered by above-mentioned central axis, and contact with the outer circumferential face of said stator, said stator holding part is positioned at above-mentioned wind-tunnel portion, and foregoing circuit plate is positioned at the position by radial outside than said stator holding part.

The tenth aspect shown in the utility model is on the basis of the Air Blast fan of recording aspect the 9th, it is characterized in that, the outer circumferential face of said stator holding part is the plane of inclination along with towards radial outside and downward, and above-mentioned multiple lighting outlets are drawn to radial outside along above-mentioned plane of inclination.

On the basis of the Air Blast fan that any one party face in first aspect to the eight aspect is recorded on the one hand of the tenth shown in the utility model, it is characterized in that, above-mentioned multiple lighting outlets are drawn to radial outside respectively from the different slots position of said stator.

The 12 aspect shown in the utility model is on the basis of the tenth Air Blast fan of recording on the one hand, it is characterized in that, the link position between above-mentioned multiple lighting outlets and foregoing circuit plate is stated more than the angle intervals of groove of stator being spaced apart more than upwards in week.

On the basis of the Air Blast fan that any one party face of the tenth three aspects: shown in the utility model in first aspect to the eight aspect recorded, it is characterized in that, the upper surface of foregoing circuit plate is positioned at the position by axial upside than the lowest surface of the iron core of said stator.

On the basis of the Air Blast fan that any one party face of the 14 aspect shown in the utility model in first aspect to the eight aspect recorded, it is characterized in that, on the upper surface of above-mentioned base plate, the substrate-placing face of mounting foregoing circuit plate is positioned at the position by axial downside than near the air-supply actinal surface above-mentioned air blowing opening, and aforesaid substrate mounting surface is connected by plane of inclination with above-mentioned air-supply actinal surface.

The 15 aspect shown in the utility model is on the basis of the Air Blast fan of recording aspect the 14, it is characterized in that, at the upper surface of above-mentioned base plate, aforesaid substrate mounting surface be positioned at than with the opposed in the axial direction magnet of above-mentioned rotor magnet under aspect by the position of axial downside.

The 16 aspect shown in the utility model is a kind of electronic equipment that possesses housing, the Air Blast fan that any one party face in aspect above-mentioned enclosure interior has above-mentioned first aspect to the 15 is recorded, above-mentioned housing possesses: top board, and it covers at least a portion of the upside of above-mentioned Air Blast fan; Side plate, it is positioned at the side of above-mentioned Air Blast fan; And base plate, it is positioned at the below of above-mentioned Air Blast fan, and at least a portion of above-mentioned top board forms above-mentioned top plate portion, and above-mentioned top plate portion has above-mentioned suction port above above-mentioned central axis.

According to the 16 aspect shown in the utility model, can make the stable rotation of above-mentioned Air Blast fan.

By the detailed description of following the utility model preferred implementation, with reference to accompanying drawing, can more clearly understand above-mentioned and other feature of the present utility model, key element, step, feature and advantage.

The utility model is also towards the electronic equipment that possesses Air Blast fan.

The utility model can be guaranteed air quantity in making Air Blast fan slimming.

Brief description of the drawings

Fig. 1 is the longitudinal sectional view of the related Air Blast fan of the first mode of execution.

Fig. 2 is near the longitudinal sectional view of motor part of Air Blast fan.

Fig. 3 is the longitudinal sectional view of sleeve.

Fig. 4 is the plan view of sleeve.

Fig. 5 is the worm's eye view of sleeve.

Fig. 6 is near longitudinal sectional view bearing portion.

Fig. 7 is the plan view of Air Blast fan.

Fig. 8 is the plan view of removing the Air Blast fan of the state after top plate portion and side wall portion.

Fig. 9 is near the longitudinal sectional view of motor part of the related Air Blast fan of the second mode of execution.

Figure 10 is the longitudinal sectional view that represents an example of electronic equipment.

Embodiment

In this manual, by the upside of the central axis J1 direction of the Air Blast fan in Fig. 11 referred to as " upside ", by downside referred to as " downside ".Above-below direction when above-below direction in this specification does not represent to be assembled on actual equipment.In addition, by centered by central axis J1 circumferentially referred to as " circumferentially " by centered by central axis J1 radially referred to as " radially ".By the direction parallel with central axis J1 referred to as " axially ".

Fig. 1 is the longitudinal sectional view of the related Air Blast fan 1 of the first mode of execution shown in the utility model.Air Blast fan 1 is centrifugal cutter.Air Blast fan 1 is for example installed in subnotebook PC, for the equipment of the enclosure interior of cooling computer.

Air Blast fan 1 comprises motor part 2, impeller portion 3 and casing 5.The central axis of impeller portion 3 is consistent with the central axis J1 of motor part 2.Impeller portion 3 comprises multiple blades 31.Multiple blades 31 centered by central axis J1 along circumferential array.Because Air Blast fan 1 is slim, therefore the width in the axial direction of blade 31 is below 3 times of thickness of blade 31.Motor part 2 makes multiple blades 31 rotate around central axis J1.Casing 5 holds motor part 2 and impeller portion 3.

Casing 5 comprises top plate portion 51, base plate 52 and side wall portion 53.Top plate portion 51 is positioned at the top of impeller portion 3.Base plate 52 is to leaving the Directional Extension of central axis J1 and covering the downside of multiple blades 31.In the present embodiment, base plate 52 is along the Directional Extension perpendicular to central axis J1.Motor part 2 is fixed on base plate 52.Side wall portion 53 surrounds the periphery of impeller portion 3.Formed the wind-tunnel portion 50 that surrounds impeller portion 3 by top plate portion 51, side wall portion 53 and base plate 52.Wind-tunnel portion 50 makes the space of air along circumferential flow by impeller portion 3.

Top plate portion 51 is formed as lamellar by the metal such as aluminum alloy or stainless steel.The die casting of base plate 52 and side wall portion 53 by resin, aluminum alloy or forging and moulding.The peripheral portion of the underpart of side wall portion 53 and base plate 52 connection such as fixes by screw thread.Top plate portion 51 waits the upper end portion of being fixed on side wall portion 53 by riveted joint.Top plate portion 51 comprises suction port 54.Suction port 54 is positioned at the top of impeller portion 3.Form air blowing opening 55 by top plate portion 51, side wall portion 53 and base plate 52 in the side of impeller portion 3.In addition, base plate 52 is also a part for the aftermentioned stationary part 21 of motor part 2.

In motor part 2, by powering to stator 210, between rotor magnet 262 and stator 210, produce the moment of torsion centered by central axis J1.Thus, multiple blades 31 of impeller portion 3 rotate centered by central axis J1.Motor part 2 impeller portions 3 rotate, and thus, air is sucked in casing 5 from suction port 54, and is sent from air blowing opening 55.

Fig. 2 is near the longitudinal sectional view of the Air Blast fan 1 motor part 2.Motor part 2 is inner-rotor types.In the case of the structure of Air Blast fan 1 being divided into as the stationary part 21 of fixing assembly with as the rotary part 22 of rotary assembled body, casing 5 is included in stationary part 21, and impeller portion 3 is included in rotary part 22.The stationary part of motor part 2 is parts of the stationary part 21 of Air Blast fan 1.The rotary part of motor part 2 is parts of the rotary part 22 of Air Blast fan 1.As described later, owing to forming gear mechanism 4 by a part for stationary part 21 and a part for rotary part 22, therefore gear mechanism 4 is regarded as in the situation of a constituting component, Air Blast fan 1 comprises stationary part 21, gear mechanism 4 and rotary part 22.Rotary part 22 is supported as rotating with respect to stationary part 21 centered by central axis J1 by gear mechanism 4.

Stationary part 21 comprises stator 210, bearing portion 23, base plate 52 and circuit board 56.Correctly say, top plate portion 51 and side wall portion 53 are also included within stationary part 21, but these parts that also can be used as the equipment that is equipped with Air Blast fan 1 arrange.Namely, also can be under the state before Air Blast fan 1 is equipped on equipment, only have the base plate 52 in casing 5 to be included in stationary part 21.

Bearing portion 23 is to have the roughly cylindric of the end centered by central axis J1.Bearing portion 23 comprises sleeve 231 and cover barrel shell 232.Sleeve 231 is roughly cylindric centered by central axis J1.Sleeve 231 is metal sinters.In sleeve 231, contain and be soaked with lubricant oil 40.Because bearing portion 23 is made up of two parts, therefore can improve the degrees of freedom of the material selection of perimembranous in bearing.In addition, because sleeve 231 is made up of sintering body, therefore can easily increase the maintenance dose of the lubricant oil 40 in bearing portion 23.

Cover barrel shell 232 is to have the end roughly cylindric centered by central axis J1.Outer circumferential face and the lower surface of cover barrel shell 232 cover sleeve 231.Sleeve 231 is fixed on the inner peripheral surface of cover barrel shell 232 by binder 233.Cover barrel shell 232 is formed by resin.Preferably sleeve 231 and fixing employing between cover barrel shell 232 bonding be pressed into two kinds of methods.The position of the radially inner side in the lower surface of sleeve 231 separates with the inner bottom surface of cover barrel shell 232 on above-below direction.Form plate container 239 (with reference to Fig. 6) by the lower surface of sleeve 231 and inner peripheral surface and the inner bottom surface of cover barrel shell 232.

Base plate 52 has the roughly through hole of round shape centered by central axis J1.Base plate 52 comprises bearing cage 521, plat part 522 and stator holding part 523.Bearing cage 521, plat part 522 and stator holding part 523 are preferably the parts that are connected.Bearing cage 521 is roughly cylindric centered by central axis J1.Bearing cage 521 extends to axial top from the inner of plat part 522.Bearing cage 521 therein side face keeps bearing portion 23.The inner peripheral surface of bearing cage 521 contacts with the bottom of the outer circumferential face of cover barrel shell 232.Bearing cage 521 uses binder to be fixed together with cover barrel shell 232.Fixing between them also can and be pressed into two kinds of methods with binder.

Stator holding part 523 is outstanding upward from the upper surface of base plate 52, and is the ring-type centered by central axis J1.Stator holding part 523 is positioned at the radial outside of stator 210.Stator holding part 523 is positioned at wind-tunnel portion 50.The inner peripheral surface of stator holding part 523 contacts with the outer circumferential face of stator 210.The outer circumferential face of stator holding part 523 is the plane of inclination 524 along with towards radial outside and downward.

Stator 210 is parts of the roughly ring-type centered by central axis J1.Stator 210 is positioned in base plate 52, and is fixed on the inner peripheral surface of stator holding part 523.Stator 210 comprises stator iron core 211 and multiple coil 212.Stator iron core 211 is laminated by laminal silicon steel plate.Multiple teeth 214 that stator iron core 211 comprises roughly circular iron core back 213 and gives prominence to from iron core back 213 to radially inner side.Multiple coils 212 consist of the wire of reeling respectively at multiple teeth 214.The inner peripheral surface of stator holding part 523 contacts with the outer circumferential face at iron core back 213.

Iron core back 213 is inserted into and is adhered in stator holding part 523.The upper end of stator holding part 523 is positioned at than position on the lower, the upper end at iron core back 213.Thus, can reduce the obstruction that the top from stator 210 is flowed into the Air Flow of wind-tunnel portion 50.And, also the upper end of blade 31 can be arranged on to lower position.Fixing between iron core back 213 and stator holding part 523 also can adopt and be gently pressed into or be pressed into.While being pressed into, can be used together binder.By making stator holding part 523 in the form of a ring, can easily keep stator 210.In order to make Air Blast fan 1 slimming, the face at the mounting iron core back 213 of base plate 52 is positioned at than the top side's in lower end of coil 212 position.

As mentioned above, form wind-tunnel portion 50 at the peripheral part of base plate 52.Bearing portion 23 is fixed on central part.Stator 210 is fixed between peripheral part and central part.In Air Blast fan 1, stator 210 and bearing portion 23 are directly fixed on the base plate 52 as base part.

Circuit board 56 is positioned at the position by radial outside than stator holding part 523.A part for circuit board 56 is positioned at wind-tunnel portion 50 and is positioned in base plate 52.Circuit board 56 is bonded in the upper surface of base plate 52.In wind-tunnel portion 50, the many lighting outlets 215 of drawing from stator 210 are connected with circuit board 56 use scolding tin.Detailed content about circuit board 56 is narrated afterwards.

Rotary part 22 comprises impeller portion 3, rotor hub portion 28, abjunction preventing part 255 and rotor magnet 262.Rotor hub portion 28 is supported by bearing portion 23.Impeller portion 3 remains on the peripheral part of rotor hub portion 28.The position except impeller portion 3 of rotary part 22 is rotary parts of motor part 2.But the border between impeller portion 3 and motor part 2 there is no need clearly to specify.

Rotor hub portion 28 comprises axle 251, the opposed portion 281 of bearing, sealed cylindrical portion 282, protuberance 283 and magnet holding part 284.Axle 251 is the parts that are connected with the opposed portion 281 of bearing, sealed cylindrical portion 282, protuberance 283 and magnet holding part 284.Rotor hub portion 28 preferably forms by metal is carried out to cutting.

Axle 251 is roughly cylindric centered by central axis J1.Axle 251 is inserted in the sleeve 231 of bearing portion 23.In other words, sleeve 231 surrounds axle 251 from radial outside.Axle 251 is with respect to bearing portion 23 rotation relatively centered by central axis J1.

Abjunction preventing part 255 is arranged on the bottom of axle 251.Abjunction preventing part 255 comprises board 256 and plate fixing part 257.Board 256 is expand to radial outside from the underpart of axle 251 roughly discoideus.The diameter of board 256 is less than the diameter of the lower surface of sleeve 231.Plate fixing part 257 extends upward from the upper surface of board 256.Outer circumferential face at plate fixing part 257 is provided with external thread part.On axle 251, be provided with the hole portion 252 of extending upward from lower end.Inner peripheral surface in hole portion 252 is provided with internal thread part.By plate fixing part 257 is screwed together in hole portion 252, board 256 is fixed on the underpart of axle 251.

Sleeve 231 and board 256 are positioned at the inner side of cover barrel shell 232.Board 256 is contained in above-mentioned plate accommodating part 239.The upper surface of board 256 is roughly circular faces.The lower surface of the upper surface of board 256 and sleeve 231 is that the face downward in plate accommodation section 239 is namely opposed in the axial direction at above-below direction.By board 256 and sleeve 231, can prevent that axle 251 from deviating from from bearing portion 23.The lower surface of board 256 is opposed in the axial direction with the inner bottom surface of cover barrel shell 232.

The opposed portion 281 of bearing expands to radial outside from the upper end of axle 251.It is tabular that the opposed portion 281 of bearing is roughly annulus centered by central axis J1.The opposed portion 281 of bearing be positioned at the top of bearing portion 23 and with bearing portion 23 axially opposed.Sealed cylindrical portion 282 is extend from the opposed portion 281 of bearing roughly cylindric downwards.Sealed cylindrical portion 282 is continuous with the periphery edge of the opposed portion 281 of bearing.Sealed cylindrical portion 282 is positioned at than bearing portion 23 leans on radial outside and the position by radially inner side than rotor magnet 262.

The outer circumferential face top of the inner peripheral surface of sealed cylindrical portion 282 and bearing portion 23 is at diametrically contraposition.Between the inner peripheral surface of sealed cylindrical portion 282 and the outer circumferential face of cover barrel shell 232, form and have seal clearance 47.Form the sealed department 47a at the place, interface that has lubricant oil 40 at seal clearance 47.Protuberance 283 is outstanding to radial outside from the outer circumferential face of sealed cylindrical portion 282.The outer end of protuberance 283 is positioned at the position by radially inner side than the outer circumferential face of rotor magnet 262.Impeller portion 3 is positioned at the radial outside of protuberance 283 and is positioned at the axial top of rotor magnet 262.

Magnet holding part 284 is roughly cylindric centered by central axis J1.Magnet holding part 284 is extended downwards from sealed cylindrical portion 282.Rotor magnet 262 is roughly cylindric centered by central axis J1, and is fixed on the outer circumferential face of magnet holding part 284.Rotor magnet 262 is positioned at the radially inner side of stator 210.The upper end of stator 210 is positioned at the position by axial below than the upper end of rotor magnet 262.

The upper surface of the plat part 522 of base plate 52 and the lower end surface of magnet holding part 284 are axially opposed.And the lower end surface of the upper surface of plat part 522 and rotor magnet 262 is also axially opposed.Between the upper surface of plat part 522 and the lower end surface of magnet holding part 284 and between the upper surface of plat part 522 and the lower end surface of rotor magnet 262, form and have the radially small lateral clearance 491 of the ring-type of expansion.In other words, plat part 522 with magnet holding part 284 across lateral clearance 491 axially opposed, plat part 522 with rotor magnet 262 across lateral clearance 491 axially opposed.The axial height of lateral clearance 491 is preferably below the above 0.5mm of 0.1mm.

Between the inner peripheral surface of magnet holding part 284 and the outer circumferential face of bearing cage 521, form the small axial clearance 492 that has the ring-type of extending vertically.The interior perimembranous of axial clearance 492 and lateral clearance 491 mutually continuously and extend upward from lateral clearance 491.The top of the inner peripheral surface of magnet holding part 284 has the plane of inclination tilting to radially inner side upward.Between this plane of inclination and the upper-end surface of bearing cage 521, form the small intermediate space 493 that has ring-type.Intermediate space 493 is mutually continuous with the upper end portion of axial clearance 492.In other words, intermediate space 493 connects the upper end portion of axial clearance 492 and the underpart of seal clearance 47.

Form labyrinth structure by lateral clearance 491, axial clearance 492 and intermediate space 493 at the radial outside of seal clearance 47.The air that thus, can suppress to comprise the lubricant oil 40 after gasification moves to the outside of gear mechanism 4 from seal clearance 47.Consequently, can suppress the evaporation of the lubricant oil 40 in gear mechanism 4.

Impeller portion 3 has impeller support 29 and multiple blade 31.Impeller support 29 comprises impeller cylindrical part 291 and impeller ring portion 292.Blade 31 comprises blade inside portion 31a and blade lateral part 31b.Impeller cylindrical part 291, impeller ring portion 292 and multiple blade 31 are preferably the parts that are connected as a single entity.

Impeller ring portion 292 is the roughly disc-shapes centered by central axis J1.Impeller ring portion 292 is extended to radial outside from the lower end of impeller cylindrical part 291.In other words, impeller cylindrical part 291 is extended to axial top from the interior perimembranous of impeller ring portion 292.Impeller cylindrical part 291 is roughly cylindric centered by central axis J1.Multiple blades 31 are positioned at the outside of impeller ring portion 292.Multiple blades 31 centered by central axis J1 along circumferential array.Multiple blades 31 are connected with impeller cylindrical part 291 by impeller ring portion 292.The outer circumferential face of the inner peripheral surface of impeller cylindrical part 291 and sealed cylindrical portion 282 is opposed.

The inner peripheral surface of impeller cylindrical part 291 is fixed on the outer circumferential face of sealed cylindrical portion 282.Impeller support 29 is inserted in rotor hub portion 28.Rotor hub portion 28 and impeller support 29 are by inserting and bonding or by bonding and be pressed into and be fixed together.The lower end of impeller cylindrical part 291 contacts with the upper surface of protuberance 283.Rotor hub portion 28 and impeller portion 3 can be also the parts that are connected as a single entity.

The inner end of blade inside portion 31a is connected with impeller ring portion 292, and the outside of blade inside portion 31a and blade lateral part 31b are integrally formed.The inner end of blade inside portion 31a is positioned at than the external diameter of stator 210 position in the inner part, and the outboard end of blade inside portion 31a is roughly positioned at than the external diameter of stator 210 position in the outer part.Impeller ring portion 292 plays the effect as the base portion of blade 31.The inner end of each blade inside portion 31a is positioned at the top of stator 210.The upper end of blade inside portion 31a is identical in axial position with the upper end of impeller ring portion 292.Thus, can guarantee the maintenance intensity of blade 31.The upper end of blade inside portion 31a is positioned at the position by axial upside than the upper surface of protuberance 283 and rotor magnet 262.Suction port 54 is positioned at a part for the upper area of blade inside portion 31a.Position is identical in the axial direction with the lower end of impeller ring portion 292 in the lower end of blade inside portion 31a.The lower end of blade inside portion 31a is positioned at the position by axial downside than the upper surface of the lower surface of protuberance 283 and rotor magnet 262.By having reduced the lower end of blade 31, in reducing the position of blade 31, can guarantee the axial length of blade 31, can guarantee air quantity.Blade inside portion 31a and coil 212 are axially opposed.

The inner end of blade lateral part 31b is connected with blade inside portion 31a.Blade inside portion 31a is roughly connected with blade lateral part 31b above stator holding part 523.The axial length of blade lateral part 31b is longer than the axial length of blade inside portion 31a.The outer end of blade lateral part 31b and the internal surface of side wall portion 53 are opposed.Position in the axial direction, the upper end of the upper end of blade lateral part 31b and blade inside portion 31a is identical.The upper end of blade lateral part 31b and the lower surface of top plate portion 51 are opposed.The lower end of blade lateral part 31b is positioned at than the more preferably position by axial downside than the upper end of stator 210, the upper end of rotor magnet 262.Lower end and the base plate 52 of blade lateral part 31b are opposed.

In Air Blast fan 1, than stator 210 position in the outer part, can make blade 31 extend downwards, thereby can guarantee the axial length of blade 31.Thus, can improve air quantity characteristic and Static compression performance.In addition, the air stream being produced by the blade lateral part 31b of blade 31 can easily pass through the top of stator 210, thereby can improve the cooling effectiveness of stator 210.

In Air Blast fan 1, radially at least a portion of each blade of multiple blades 31 is positioned at the top of stator 210.That is to say, the space between multiple blades 31 and stator 210 is connected with the space between multiple blades 31 and top plate portion 51 by the gap between multiple blades 31.Thus, can make the air being sucked vertically directly contact with stator 210, thereby can force cooling stator 210.The inner peripheral surface at iron core back 213 is arranged in the position of all leaning on radial outside than any one party of the base portion of rotor hub portion 28 and multiple blade 31, therefore can cooling whole iron core back 213.

And the ora terminalis of the radial outside of coil 212 is arranged in the position of all leaning on radial outside than any one party of the base portion of rotor hub portion 28 and multiple blade 31.Thus, direct cooling coil 212.And a part for the air being inhaled into, by between coil 212 and coil 212, therefore can further improve cooling effectiveness.

In addition, also can between coil 212 and adjacent coil 212, fill molding resin, make air not by between coil 212 but flow to rapidly the outside of stator 210.Thus, can prevent that air quantity characteristic from declining.

In Fig. 2, multiple blades 31 are fixed on the outer circumferential face of sealed cylindrical portion 282 indirectly by impeller support 29.Multiple blades 31 also can directly not be fixed on the outer circumferential face of sealed cylindrical portion 282 by impeller support 29 other parts such as grade.

In Air Blast fan 1, the upper end of stator 210 is positioned at the position by axial below than the upper end of rotor magnet 262, and impeller portion 3 extends to radial outside above the axial direction of magnet.Multiple blades 31 are positioned at the axial top of stator 210.By such structure, can guarantee the axial dimension between the lower end of blade 31 and the upper end of stator 210.Also can prevent from interfering between blade 31 and stator 210, thereby guarantee the axial length of blade 31.Thus, can guarantee air quantity.

In addition, by said structure, can guarantee the axial distance between top plate portion 51 and blade 31.That is to say, in the distance of guaranteeing between stator 210 and blade 31, with respect to the axial integral height of Air Blast fan 1, can relatively blade 31 be configured in to axial below.When electronic equipment is slim, that is to say, the shared ratio of electronic component in the housing of electronic equipment is high, and the upside of the suction port 54 of Air Blast fan 1 does not have in the situation in enough spaces, and gettering efficiency is low.Due to adopt above-mentioned Air Blast fan 1, can form enter blade 31 air accumulate space.Thus, can provide the Air Blast fan 1 that air quantity characteristic is high.

Wind-tunnel portion 50 can be defined as such space: between the periphery and side wall portion 53 of stator 210, and expand along circumferential, and below axially, arrive the upper surface of base plate 52.Certainly, wind-tunnel portion 50, as long as be roughly above-mentioned scope, does not have necessity of strict difinition.A part of blade inside portion 31a and blade lateral part 31b are in the interior movement of wind-tunnel portion 50.

As shown in Figure 1, in Air Blast fan 1, the axial distance between the upper end-face edge of suction port 54 and the upper end of multiple blade 31 is larger than the axial distance between the lower end of multiple blades 31 and stator 210.Thus, air inflow increases, and air quantity increases.

Fig. 3 is the longitudinal sectional view of sleeve 231.Top and bottom at the inner peripheral surface 271 of sleeve 231 are provided with the first radial dynamic pressure groove row 272 and the second radial dynamic pressure groove row 273.The first radial dynamic pressure groove row 272 and the second radial dynamic pressure groove row 273 are made up of multiple lambdoid grooves respectively.Fig. 4 is the plan view of sleeve 231.Be provided with the first axial hydrodynamic groove row 275 that formed by multiple spiral-shaped grooves at the upper surface 274 of sleeve 231.Fig. 5 is the worm's eye view of sleeve 231.Be provided with the second spiral-shaped axial hydrodynamic groove row 277 at the lower surface 276 of sleeve 231.

The first radial dynamic pressure groove row 272 and the second radial dynamic pressure groove row 273 also can be arranged on the outer circumferential face of axle 251.The first axial hydrodynamic groove row 275 also can be arranged in the lower surface of the opposed portion 281 of bearing and the opposed region of upper surface 274 sleeve 231.The second axial hydrodynamic groove row 277 also can be arranged on the upper surface of board 256.The first axial hydrodynamic groove row 275 can be also the aggregates of lambdoid groove.The second axial hydrodynamic groove row 277 can be also the aggregates of lambdoid groove.Be provided with 2 grooves 278 that extend vertically at the outer circumferential face of sleeve 231.Groove 278 is used to the circulation of lubricant oil 40.

Fig. 6 is near longitudinal sectional view bearing portion 23.Between board 256 and cover barrel shell 232, form and have underclearance 42.Lubricant oil 40 is present in underclearance 42.Between the side of board 256 and the bottom inside face of cover barrel shell 232, form and have plate peripheral space 48.Lubricant oil 40 is present in plate peripheral space 48.Between the lower surface of sleeve 231 and the upper surface of board 256, form and have the second axial clearance 43.Lubricant oil 40 is present in the second axial clearance 43.The second axial clearance 43 has formed the second 43a of axial hydrodynamic bearing portion that makes lubricant oil 40 produce hydrodynamic.By plate peripheral space 48, the peripheral part of lubricant oil 40 from the peripheral part continued presence of the second axial clearance 43 to underclearance 42.

Between the outer circumferential face of axle 251 and the inner peripheral surface of sleeve 231, form and have radial clearance 41.The underpart of radial clearance 41 is mutually continuous with the interior perimembranous of the second axial clearance 43.Radial clearance 41 comprises the first radial clearance 411 and is positioned at than the second radial clearance 412 of the first radial clearance 411 position on the lower.

The first radial clearance 411 is formed between the position that is provided with the first radial dynamic pressure groove row 272 in Fig. 3 in the outer circumferential face of axle 251 and the inner peripheral surface of sleeve 231.The second radial clearance 412 is formed between the position that is provided with the second radial dynamic pressure groove row 273 in the outer circumferential face of axle 251 and the inner peripheral surface of sleeve 231.Lubricant oil 40 is present in radial clearance 41.The first radial clearance 411 and the second radial clearance 412 have formed the 41a of Journal Bearings in Hydrodynamic Lubrication portion that makes lubricant oil 40 produce hydrodynamic.By the second radial clearance 412, axle 251 is radially being supported.

Between the upper surface of bearing portion 23 and the lower surface of the opposed portion 281 of bearing, form and have the first axial clearance 44.The first axial clearance 44 is expanded to radial outside from the upper end portion of radial clearance 41.Lubricant oil 40 is present in the first axial clearance 44.The region that is provided with the first axial hydrodynamic groove row 275 shown in Fig. 4 in the first axial clearance 44 forms the first 44a of axial hydrodynamic bearing portion that makes lubricant oil 40 produce hydrodynamic.That is to say, the gap between the upper surface 274 of sleeve 231 and the lower surface of the opposed portion 281 of bearing has formed the first 44a of axial hydrodynamic bearing portion that makes lubricant oil 40 produce hydrodynamic.

By the first 44a of axial hydrodynamic bearing portion and the second 43a of axial hydrodynamic bearing portion, the opposed portion 281 of bearing is axially being supported.By the first 44a of axial hydrodynamic bearing portion and the second 43a of axial hydrodynamic bearing portion are set, can reduce the deviation of axle 251 at the play of above-below direction.Above-mentioned seal clearance 47 extends downwards from the peripheral part of the first axial clearance 44.

Between the outer circumferential face of sleeve 231 and the inner peripheral surface of cover barrel shell 232, form circulation road 45 by the groove 278 in Fig. 3.Circulation road 45 is communicated with the peripheral part of the first 44a of axial hydrodynamic bearing portion and the peripheral part of the second 43a of axial hydrodynamic bearing portion.

In motor part 2, seal clearance 47, the first axial clearance 44, radial clearance 41, the second axial clearance 43, plate peripheral space 48, underclearance 42 and circulation road 45 have formed an interconnective bag structure, and lubricant oil 40 continued presences are in bag structure.In bag structure, the interface of lubricant oil 40 is only formed in the seal clearance 47 between the inner peripheral surface of sealed cylindrical portion 282 and the outer circumferential face of bearing portion 23.By bag structure, can easily prevent that lubricant oil 40 from spilling.

The gear mechanism 4 of motor part 2 comprises axle 251, sleeve 231, cover barrel shell 232, binder 233, board 256, the opposed portion 281 of bearing, sealed cylindrical portion 282 and above-mentioned lubricant oil 40.In gear mechanism 4, axle 251, board 256, the opposed portion 281 of bearing and sealed cylindrical portion 282 rotate with respect to bearing portion 23 centered by central axis J1 relatively by lubricant oil 40.

In Air Blast fan 1, the in the situation that of formation by metal being carried out to cutting in rotor hub portion 28, can improve the accuracy to shape of rotor hub portion 28.Thus, can form accurately the 41a of Journal Bearings in Hydrodynamic Lubrication portion, the first 44a of axial hydrodynamic bearing portion, the second 43a of axial hydrodynamic bearing portion and seal clearance 47.

Fig. 7 is the plan view of Air Blast fan 1.Fig. 8 is the plan view of removing the Air Blast fan 1 of the state after top plate portion 51 and side wall portion 53.Arrange top plate portion 51 and side wall portion 53 in the case of being equipped with the equipment side of Air Blast fan 1, be installed on the Air Blast fan 1 of the state before equipment roughly as shown in Figure 8.Therefore,, in the situation that having side wall portion 53 and top plate portion 51, base plate 52 has formed wind-tunnel portion 50 and air blowing opening 55 jointly with side wall portion 53 and top plate portion 51.

As shown in Figure 7, the suction port 54 of Air Blast fan 1 is overlapping in the axial direction with rotor hub portion 28, impeller support 29 and blade inside portion 31a.Part or all of the coil 212 of stator 210 is also overlapping in the axial direction with suction port 54.In principle, blade lateral part 31b is positioned at wind-tunnel portion 50, not overlapping in the axial direction with suction port 54.

As shown in Figure 8, circuit board 56 comprises curved part 561 and leading-out part 562.Curved part 561 is arcuation along wind-tunnel portion 50 and extends.Leading-out part 562 extends from curved part 561 to radial outside.Between side wall portion 53 and base plate 52, be provided with the slit gap inserting for leading-out part 562.Circuit board 56 is flexible printed board (FPC).In the situation that overlooking curved part 561, the edge in the edge of air supply direction upstream side and air supply direction downstream side is arcuation.Because the edge at the circumferential two end part of curved part 561 is arcuation, therefore compared with having the situation in bight, can reduce the floatation volume of end while floating from base plate 52.Thus, can suppress the decrease in efficiency of blowing.In addition, the edge of arcuation is preferably at least arranged on the end of air supply direction upstream side.

The radial width of wind-tunnel portion 50 is along with roughly reducing gradually towards air supply direction upstream, and while therefore preferably overlooking curved part 561, the radial width of curved part 561 is along with reducing gradually towards air supply direction upstream.Thus, can guarantee the width of curved part 561, curved part 561 easily can be configured in base plate 52.The radially inner side of curved part 561 and the edge in outside approach with stator holding part 523 and side wall portion 53 respectively.In Fig. 8, side wall portion 53 use two dot and dash line represent.Because Air Blast fan 1 is small-sized fans, therefore, the in the situation that of present embodiment, curved part 561 has all-round more than 1/4 length.

The many lighting outlets 215 of drawing from stator 210 are connected with the curved part 561 of circuit board 56 in wind-tunnel portion 50.In the present embodiment, the quantity of lighting outlet 215 is 4.In addition, in the present embodiment, lighting outlet 215 is connected by scolding tin with circuit board 56.Link position between lighting outlet 215 and circuit board 56 leans on radial outside than impeller portion 3.Thus, can easily avoid the interference between joint 563 and impeller portion 3.Its result is exactly, and can guarantee the axial height of blade lateral part 31b, can increase air quantity.About the such configuration of joint 563, connect by scolding tin, be particularly useful for the higher situation of height of joint 563.Certainly, the height of joint 563 is enough in low situation, and joint 563 also can be positioned at the below of blade 31.

In addition, the magnetic center in the axial direction of stator 210 is positioned at than the position on the lower of the magnetic center in the axial direction of rotor magnet 262.Thus, after assembling, impeller portion 3 can not move downwards.Consequently, after assembling, can prevent reliably that blade 31 from contacting with the lighting outlet 215 that is positioned at below.

By circuit board 56 being connected with lighting outlet 215 wind-tunnel portion 50 is interior, can cut down the constituting component overlapping in the axial direction with circuit board 56, thereby can easily make Air Blast fan 1 slimming.In addition, also can increase the gap between axle direction length and top plate portion 51 and the blade 31 of blade 31, thereby the air quantity that can easily realize Air Blast fan 1 is guaranteed.

From reducing the viewpoint of noise, joint 563 preferably and impeller portion 3 be separated.Therefore, the link position between many lighting outlets 215 and circuit board 56 is radially being positioned at the central authorities of curved part 561 or the position by radial outside than central authorities at the width direction of curved part 561.

The body component forming at side wall portion 53 and top plate portion 51 carries out being connected between lighting outlet 215 and circuit board 56 before being installed to base plate 52.Easily carry out in order to make to connect operation, link position upwards separated in week.Therefore, many lighting outlets 215 are drawn to radial outside respectively from the different groove position of stator 210.Preferably link position in week upwards with more than the angle intervals of the groove of stator 210 being spaced apart.In addition, link position upwards separated with the width more than radial width of curved part 561 in week.

As shown in Figure 2, lighting outlet 215 is drawn to radial outside along the plane of inclination 524 of the outer circumferential face as stator holding part 523.When worker connects operation, lighting outlet 215 is drawn to radial outside along plane of inclination 524, and by the pad on circuit board 56 together with lighting outlet 215 solderings.Now, owing to not there is not side wall portion 53, therefore worker can freely utilize the region by radial outside than stator holding part 523.After soldering, unnecessary lighting outlet 215 is cut off.Because lighting outlet 215 is along plane of inclination 524, therefore, in the time of the connection operation of carrying out other lighting outlet 215, can reduces the lighting outlet 215 being connected and contact with instrument and cause lighting outlet 215 that the possibility of broken string occurs.

In order to make Air Blast fan 1 slimming, stator 210 and rotor magnet 262 are positioned at below as much as possible.As shown in Figure 2, iron core back 213 is positioned at than the end of tooth 214 position on the lower.It is that the lowest surface of stator coil 211 is by the position of axial upside that the upper surface of circuit board 56 is positioned at than the lower surface at iron core back 213.

The region that disposes circuit board 56 in base plate 52 is very thin.In order to ensure the rigidity of base plate 52, the near zone of the air blowing opening 55 of base plate 52 is thicker than the region that disposes circuit board 56.As shown in Figure 8, at the upper surface of base plate 52, the substrate-placing face 525 of mounting circuit board 56 is positioned at the position by axial downside than near the air-supply actinal surface 526 air blowing opening.Substrate-placing face 525 is connected by plane of inclination 527 with air-supply actinal surface 526.By plane of inclination 527, the decline of the characteristic that can suppress to blow in the rigidity of guaranteeing base plate 52.

And, in order to ensure the rigidity of bearing cage 521 block bearing portions 23, as shown in Figure 2, at the upper surface of base plate 52, substrate-placing face 525 be positioned at than with 528 positions by axial downside aspect rotor magnet 262 is under axial opposed magnet.Thus, can easily make the thickness at Thickness Ratio substrate-placing face 525 places at 528 places, aspect under the magnet of base plate 52 thick.In addition, also can make the thickness of base plate 52 entirety thinner.In this case, base plate 52 is preferably by nonmagnetic material moulding.

Fig. 9 is near the sectional view of motor part 2 of the related Air Blast fan 1 of the second mode of execution of the utility model example.The Air Blast fan 1 of Fig. 9 is the Air Blast fan more small-sized Air Blast fan more related than the first mode of execution.The ora terminalis of the radial outside of the blade 31C of Air Blast fan 1 is positioned at the position by radially inner side than the outer circumferential face of stator 210.Impeller support 29C comprises impeller cylindrical part 291 and impeller ring portion 292.The lower end of impeller ring portion 292 is positioned at the position more top than the lower surface of protuberance 283.The lower surface of impeller ring portion 292 is opposed across the upper surface of gap and rotor magnet 262.The upper surface of impeller ring portion 292 also has the plane of inclination being connected with impeller cylindrical part 291.

Blade 31C is configured in the upside of stator 210.The end of the inner of blade 31C and tooth 214C is neighbouring axially opposed.The outer end of blade 31C is positioned at the position by radially inner side than the outer circumferential face of stator 210.The outer end general and coil 212, outer end of blade 31C is neighbouring axially opposed.By such structure, can make the outer end, top of stator 210 be exposed to wind-tunnel portion 50, thus can cooling stator 210.In addition, the outer end of blade 31C is positioned at the position by radially inner side than the inner edge of top plate portion 51C.In other words, can be from the visual outer end of seeing blade 31C of suction port 54 in the time overlooking.The lower end of blade 31C is concordant with impeller ring portion 292.The lower end of blade 31C is positioned at the top position of upper surface than the lower surface of protuberance 283 and rotor magnet 262.

Stator iron core 211C is formed by laminal silicon steel plate.Multiple tooth 214C that stator iron core 211C comprises roughly circular iron core back 213 and gives prominence to from iron core back 213 to radially inner side.The end of tooth 214C is towards axially upper lateral bend, and the outer circumferential face of this flexure plane (internal surface) and rotor magnet 262 is at diametrically contraposition.The upper end of the end of tooth 214C and the 3C of impeller portion are opposed.In the present embodiment, show 1 silicon steel plate, but also can be stacked multiple silicon steel plates, but the structure of bending 1 silicon steel plate only.

Iron core back 213C is inserted in stator holding part 523.The stator holding part of present embodiment is not by upwards side-prominent but keep stator 210 by recess being set in base plate 52.Other structures and Fig. 2 of motor part 2 are roughly the same, indicate identical symbol to same constituting component.

In the Air Blast fan 1 of Fig. 9, side wall portion 53 is close to each other with stator 210.Therefore, circuit board (diagram omit) is configured near position air blowing opening 55 in wind-tunnel portion 50.Therefore,, in the time observing Air Blast fan 1 from air blowing opening 55, can estimate and confirm circuit board (diagram is omitted) and joint 533.The 3C of impeller portion and side wall portion 53 are at a distance of more than 1mm.

Figure 10 is the longitudinal sectional view that represents an example of the electronic equipment 8 that comprises Air Blast fan 1.In Figure 10, by electronic equipment 8 exploded representation on above-below direction.The housing 80 of electronic equipment 8 comprises top board 81, side plate 82 and base plate 83.A part for top board 81 forms the top plate portion 51 of Air Blast fan 1.Top board 81 also can be overall as top plate portion 51.Namely top board 81 covers at least a portion of the upside of Air Blast fan 1.Side wall portion 53 is outstanding downwards from top board 81.That is to say, top board 81 is the parts that are connected as a single entity with side wall portion 53.

Be connected with the base plate 52 of Air Blast fan 1 by side wall portion 53 and form air blowing opening 55.Side plate 82 is positioned at the side of Air Blast fan 1.Side plate 82 extends downwards from the peripheral part of top board 81.A part for side plate 82 also can form the side wall portion 53 of Air Blast fan 1.Side plate 82 covers at least a portion of the side of Air Blast fan 1.Top plate portion 51 has the hole as suction port 54 above central axis J1.Base plate 83 is positioned at the below of Air Blast fan 1.Base plate 83 is connected with the lower end of side plate 82.

The structure of above-mentioned Air Blast fan 1 and electronic equipment 10 also can carry out various changes.

For example, the quantity that is arranged on the groove 278 of the outer circumferential face of sleeve 231 can be also more than 3.In addition, also can at the outer circumferential face of sleeve 231, groove be set.

The material of each parts such as impeller portion 3, gear mechanism 4, casing 5 also can suitably change.For example, sleeve 231 is not limited to sintering metal.Cover barrel shell 232 also can be formed by metal.For example, cover barrel shell 232 also can the moulding by the die casting of aluminium etc.Impeller portion 3 also can be formed by metal.

In the motor part 2 shown in Fig. 1, be stator 210 and bearing portion 23 and be directly fixed in the structure as the base plate 52 of base part, but can be also the structure being indirectly fixed by the parts such as lining are set betwixt.

The first axial hydrodynamic groove row 275 both can be arranged on the upper surface of cover barrel shell 232, also can be arranged in the lower surface of the opposed portion 281 of bearing and the opposed region of upper surface cover barrel shell 232.In other words, the first axial hydrodynamic groove row 275 are arranged at least one party in the upper surface of bearing portion 23 and the lower surface of the opposed portion 281 of bearing.Thus, between the upper surface of bearing portion 23 and the lower surface of the opposed portion 281 of bearing, form and have the first 44a of axial hydrodynamic bearing portion.

Also can not there is not the second 43a of axial hydrodynamic bearing portion.In this case, board 256 only has the function of anticreep.Also can not there is not the first 44a of axial hydrodynamic bearing portion.

Also can not there are not the first radial dynamic pressure groove row 272 and the second radial dynamic pressure groove row 273.

Also can utilize other structure as gear mechanism 4.The interface location of lubricant oil 40 can change.Gear mechanism 4 also can not utilize hydrodynamic.

Rotor magnet 262 both can be directly fixed on rotor hub portion 28, also can be indirectly fixing by miscellaneous part.Rotor magnet 262 can be also the parts that are connected as a single entity with rotor hub portion 28, even in this case, also can regard the state that is fixed in fact rotor hub portion 28 as rotor magnet 262 as.

Curved part 561 needs not to be the wedge-shaped part reducing gradually at length range insied width.For example, curved part 561 can be also that only a part is the wedge-shaped part along with reducing gradually towards air supply direction upstream width.

In Air Blast fan 1, suction port 54 both can be arranged on top plate portion 51 and base plate 52, and both are upper, also can only be arranged in base plate 52.

Electronic component also can be configured on circuit board 56.For example, curved part 561 is extended to air blowing opening 55 sides, near near the upstream side that is more preferably being positioned at side wall portion 53 air blowing opening 55 tongue outstanding to radially inner side, configure electronic component.

Curved part 561 needn't entirety be positioned at wind-tunnel portion 50.For example, also can between side wall portion 53 and base plate 52, arrange to the recess of radial outside depression at side wall portion 53, a part for curved part 561 is entered in this recess.And, also can make lighting outlet 215 and a part for the joint 533 of curved part 561 enter in recess.Also can substitute recess and the hole that connects side wall portion 53 is set.

Circuit board 56 also can entirety be positioned at wind-tunnel portion 50.At least a portion of circuit board 56 is positioned at wind-tunnel portion 50 and is positioned in base plate 52.

The structure of above-mentioned mode of execution and each variation only otherwise conflictingly can carry out suitable combination.

The related Air Blast fan of the utility model can be used in the internal cooling of notebook type PC or dull and stereotyped PC, or the apparatus cools of the enclosure interior of Desktop PC, or miscellaneous equipment is cooling, and can be used in air supply to various objects etc.And, can be for other purposes.

Preferred implementation according to the above description can think, for a person skilled in the art, the variation and the modification that do not exceed the utility model protection domain are apparent.The utility model protection domain is determined by these claims.

Claims (16)

1. an Air Blast fan, it possesses:

Stationary part;

Gear mechanism; And

Rotary part, it is supported to and can centered by the central axis towards above-below direction, rotates with respect to above-mentioned stationary part by means of above-mentioned gear mechanism,

Above-mentioned stationary part possesses:

Base plate, it is to the Directional Extension away from above-mentioned central axis;

The stator of ring-type, it is positioned in above-mentioned base plate; And

Circuit board,

Above-mentioned rotary part possesses:

The rotor magnet of ring-type, it is positioned at the radially inner side of said stator;

Rotor hub portion, above-mentioned rotor magnet directly or by other parts is fixed on above-mentioned rotor hub portion indirectly; And

Impeller portion, it is fixed on above-mentioned rotor hub portion,

Above-mentioned Air Blast fan is characterised in that,

Above-mentioned impeller portion has the multiple blades along circumferential array,

At least a portion of each of above-mentioned multiple blades is positioned at the top of said stator,

In the case of there is the side wall portion of the periphery of surrounding above-mentioned impeller portion and be positioned at above-mentioned impeller portion above top plate portion, above-mentioned base plate and above-mentioned side wall portion and above-mentioned top plate portion have formed wind-tunnel portion and air blowing opening jointly, in this wind-tunnel portion, make air along circumferential flow by above-mentioned impeller portion, above-mentioned air blowing opening is positioned at the side of above-mentioned impeller portion

At least one party in above-mentioned top plate portion and above-mentioned base plate has suction port,

Above-mentioned wind-tunnel portion is such space: between the periphery and above-mentioned side wall portion of said stator, and along circumferentially expansion, and below axially, arrive the upper surface of above-mentioned base plate,

At least a portion of foregoing circuit plate is positioned at above-mentioned wind-tunnel portion and is positioned in above-mentioned base plate,

In above-mentioned wind-tunnel portion, multiple lighting outlets of drawing from said stator are connected with foregoing circuit plate.

2. Air Blast fan according to claim 1, is characterized in that,

Link position between above-mentioned multiple lighting outlet and foregoing circuit plate is in the position by radial outside than above-mentioned impeller portion.

3. Air Blast fan according to claim 2, is characterized in that,

Above-mentioned multiple lighting outlet is connected by scolding tin with foregoing circuit plate.

4. Air Blast fan according to claim 1, is characterized in that,

Foregoing circuit plate comprises the curved part extending along above-mentioned wind-tunnel portion.

5. Air Blast fan according to claim 4, is characterized in that,

In the situation that overlooking above-mentioned curved part, above-mentioned curved part possesses along with towards air supply direction upstream and the wedge-shaped part that the radial width of above-mentioned curved part reduces gradually.

6. Air Blast fan according to claim 4, is characterized in that,

In the situation that overlooking above-mentioned curved part, the edge of air supply direction upstream side is arcuation.

7. Air Blast fan according to claim 6, is characterized in that,

In the situation that overlooking above-mentioned curved part, above-mentioned curved part possesses along with towards air supply direction upstream and the wedge-shaped part that the radial width of above-mentioned curved part reduces gradually.

8. Air Blast fan according to claim 4, is characterized in that,

Link position between above-mentioned multiple lighting outlet and foregoing circuit plate is positioned at the radially central authorities of above-mentioned curved part or is positioned at specific diameter to central authorities position in the outer part.

9. according to the Air Blast fan described in any one in claim 1 to 8, it is characterized in that,

Above-mentioned base plate comprises stator holding part, and described stator holding part is outstanding upward from the upper surface of above-mentioned base plate, is the ring-type centered by above-mentioned central axis, and contacts with the outer circumferential face of said stator;

Said stator holding part is positioned at above-mentioned wind-tunnel portion,

Foregoing circuit plate is positioned at the position by radial outside than said stator holding part.

10. Air Blast fan according to claim 9, is characterized in that,

The outer circumferential face of said stator holding part is the plane of inclination along with towards radial outside and downward,

Above-mentioned multiple lighting outlet is drawn to radial outside along above-mentioned plane of inclination.

11. according to the Air Blast fan described in any one in claim 1 to 8, it is characterized in that,

Above-mentioned multiple lighting outlet is drawn to radial outside respectively from the different slots position of said stator.

12. Air Blast fans according to claim 11, is characterized in that,

Link position between above-mentioned multiple lighting outlet and foregoing circuit plate is stated more than the angle intervals of groove of stator being spaced apart more than upwards in week.

13. according to the Air Blast fan described in any one in claim 1 to 8, it is characterized in that,

The upper surface of foregoing circuit plate is positioned at the position by axial upside than the lowest surface of the iron core of said stator.

14. according to the Air Blast fan described in any one in claim 1 to 8, it is characterized in that,

At the upper surface of above-mentioned base plate, the substrate-placing face of mounting foregoing circuit plate is positioned at the position by axial downside than near the air-supply actinal surface above-mentioned air blowing opening, and aforesaid substrate mounting surface is connected by plane of inclination with above-mentioned air-supply actinal surface.

15. Air Blast fans according to claim 14, is characterized in that,

At the upper surface of above-mentioned base plate, aforesaid substrate mounting surface be positioned at than with the opposed in the axial direction magnet of above-mentioned rotor magnet under aspect by the position of axial downside.

16. 1 kinds possess the electronic equipment of housing, it is characterized in that,

Air Blast fan described in above-mentioned enclosure interior has any one in claim 1 to 15,

Above-mentioned housing possesses:

Top board, it covers at least a portion of the upside of above-mentioned Air Blast fan;

Side plate, it is positioned at the side of above-mentioned Air Blast fan; And

Base plate, it is positioned at the below of above-mentioned Air Blast fan,

At least a portion of above-mentioned top board forms above-mentioned top plate portion,

Above-mentioned top plate portion has above-mentioned suction port above above-mentioned central axis.