CN101424278A

CN101424278A - Fan

Info

Publication number: CN101424278A
Application number: CNA2008101778433A
Authority: CN
Inventors: 彼得·D·甘马克; 弗雷德里克·尼古拉斯; 凯文·J·西蒙斯
Original assignee: Dyson Ltd
Current assignee: Dyson Technology Ltd; Dyson Ltd
Priority date: 2007-09-04
Filing date: 2008-09-04
Publication date: 2009-05-06
Anticipated expiration: 2028-09-04
Also published as: GB0717155D0; CN101424279A; CN101424279B; CN101424278B; GB2452490A; ES2365066T3; ES2355441T3

Abstract

The present invention discloses a fan assembly for generating air flow. The bladeless fan assembly comprises a nozzle mounted on a base, and the base is used to receive components for generating air flow through the nozzle. The nozzle comprises an interior passage for receiving the air flow from the base and an air outlet through which the air flow is ejected. The nozzle limits a mouth extending basically orthogonally in relation to a shaft, the air outside the fan assembly is pumped by the air flow ejected from the air outlet through the mouth, the nozzle and the base have a depth in the shaft direction, and the depth of the base is no more than two times of the nozzle depth. The fan is provided with means for generating air flow and cooled air flow without a blade fan, namely a bladeless fan generates air flow. Selectively, the fan assembly has a height extending from the base tag end far from the nozzle to the nozzle tag end far from the base, and a width being vertical to the height, the height and the width are all vertical to the shaft, and the base width is no more than 75% of the nozzle width. The configuration ensures the fan assembly to have a compact structure.

Description

Fan

Technical field

The present invention relates to a kind of fan assembly.Especially, but not exclusively, the present invention relates to a kind of indoor fan, bracker fan for example is in order to produce air circulation and air stream in room, office or other indoor environment.

Background technique

The indoor fan of a lot of types is for known to us.Normally, conventional fan comprises that an independent cover is mounted to the blade or the wing that rotates around axis, and installs so that the drive unit of a whole set of blade rotation around axis.Can obtain the indoor fan of various sizes and diameter, for example, the ceiling fan diameter can be 1m at least, and installs in the mode that is suspended on the ceiling board usually, and is positioned to provide air-flow downwards and makes the room cooling.

On the other hand, the diameter of bracker fan generally is about 30cm, and can arbitrarily place and portability usually.In the configuration of standard desktop fan, an independent cover blade is settled near the user, and the rotation of fan blade provides air stream forward towards the user in the room or to the part in room.The fan of other type can place on the floor or be installed on the wall.The motion of air or circulation produce so-called " air-cooled " or gentle breeze, and therefore, the user can experience nice and cool effect by convection current and evaporation when being dispersed at heat.Be suitable for being placed on desk or the estrade such as disclosed fan in USD 103,476 and US 1,767,060.US1,767,060 disclose a kind of bracker fan with swing function, and the purpose of this function is to provide the air circulation ability that two or more prior art fans can provide that is equivalent to.

The shortcoming of such device is that the flowing forward of air stream that the rotation blade of fan produces can allow the user feel inhomogeneous.This is owing to the variation by blade surface or fan outer end face produces.Air-flow inhomogeneous or " wave " can make the people feel a series of pulsing airflow or fitful wind, and may be very noisy.Other shortcoming is that the nice and cool effect that produces of fan is along with weakening with the increase of user's distance.This just means that fan must be closely be placed near the user could allow the user obtain the benefit of fan.

In indoor environment, because spatial constraints is necessary to make equipment compact as far as possible.Do not expect that parts protrude or allow the user touch any moving element of fan, for example blade from equipment.Some equipment has safety installations, for example around the shielding can of blade or shroud, in case the user is injured by the moving element of fan.USD103,476 have showed a kind of shielding can around blade, however segregate blade part is difficult to cleaning.

At US2,488,467, US2,433,795 and JP56-167897 in the fan or the circulator of other type are disclosed.US2, the fan in 433,795 has swivelling chute rather than fan blade in rotation is shrouded.US2, disclosed circulating fan discharges air-flow from series of nozzles in 488,467, and has very big pedestal, and this pedestal comprises motor and gas fan or the fan that is used to produce air-flow.

Always aforesaid fan the user can be positioned adjacent to, a large amount of working zone of user will be taken because huge profile and structure mean fan.Especially place or during near desk when fan, fan body or pedestal have reduced the area that can occupy for document district, computer or other office equipment.Common a plurality of equipment must be placed in the same area, provides a little near power supply, and near miscellaneous equipment, connects and minimizing operating cost with convenient.

The profile and the structure that are placed on the fan on the desk have not only reduced user's working space, and have blocked the natural light light of artificial light (or from) of directive desk.In addition, nervous work or reading need good desk light, and good light can reduce because eyestrain and the associated health problems that works long hours and brought under the more weak environment of light.

Summary of the invention

The present invention aims to provide a kind of improved fan assembly to overcome defective of the prior art.The purpose of this invention is to provide a kind of compact type fan assembly, this fan assembly in use can produce air-flow with even velocity from the emission output face of fan.

According to a first aspect of the invention, a kind of on-bladed fan assembly that produces air stream is provided, this fan assembly comprises that the nozzle that is installed on the base housing is to produce the air-flow by nozzle, this nozzle comprises inner passage and the relief opening that is used to receive from the air-flow of base, by this relief opening jet-stream wind, basically extension limits opening to nozzle about orthogonal axe ground, the air-flow suction that the fan assembly air outside is sprayed from relief opening by opening, wherein, in nozzle and the pedestal each all has a degree of depth on described axial direction, wherein, the pedestal degree of depth is no more than the twice of nozzle depth.

Preferably, the degree of depth of pedestal is in 100mm arrives the scope of 200mm, more preferably about 150mm.In this configuration, preferably, fan assembly has from the base ends away from nozzle and extends to height away from the nozzle-end of pedestal, and perpendicular to width highly, this the height with this width all with described axis normal, and wherein, the width of pedestal be no more than nozzle width 75%.

According to a second aspect of the invention, a kind of on-bladed fan assembly that produces air stream also is provided, this fan assembly comprises that the nozzle that is installed on the base housing is to produce the air-flow by nozzle, this nozzle comprises inner passage and the relief opening that is used to receive from the air-flow of base, by this relief opening jet-stream wind, basically extension limits opening to nozzle about orthogonal axe ground, the air-flow suction that the fan assembly air outside is sprayed from relief opening by opening, this fan assembly has from the base ends away from nozzle and extends to away from the height of the nozzle end of pedestal with perpendicular to the width of height, this the height with this width all with described axis normal, and wherein, the width of pedestal be no more than nozzle width 75%.

Two aspects of the present invention all provide the device that does not need blade fan just can produce air stream and cause nice and cool effect.The on-bladed device is not owing to there being fan blade to reduce noise at the sound that air movement produces, and reduced moving element and complexity.The size of pedestal is smaller with respect to the size of the size of nozzle and whole wind fan device structure.The degree of depth of fan assembly pedestal makes fan assembly become thin and long product, takies user's working zone hardly.Advantageously, the invention provides a kind of transmission from the fan assembly of the area of coverage less than the suitably nice and cool effect of prior art fan.Advantageously, this configuration parts that can make device is available and the prior art fan is required parts compare smaller amounts are produced and are made.Cost of production and complexity have so just been reduced.

About fan particularly in the explanation about the fan of preferred implementation, term " on-bladed " (bladeless) is used for describing that air-flow discharges forward or ejection and need not use the equipment of blade from fan component following.By this definition, the on-bladed fan assembly can be counted as has output face or the launch site that does not have the blade or the wing, and air-flow is along roughly therefrom discharging or launch towards user's direction.The on-bladed fan can provide main air to originate by multiple source apparatus or generating means and produce air-flow, for example pump, generator, motor or comprise engine rotor and other fluid delivery systems of rotating equipment such as impeller blade.The air quantity that produces by motor makes passes inner passage arrival nozzle the environment of air draught from room or fan assembly outside, sprays from relief opening then.

Therefore, do not lie in the required parts of fan secondary function such as extending to power source and component about the illustrative purposes of on-bladed fan component, such as motor.The example of fan secondary function comprises the swing of illumination, adjusting and fan.

Preferably, the base width scope of fan assembly is 65% to 55% of a nozzle width, more preferably is about 50% of nozzle width.In preferred embodiment, the altitude range of fan assembly be 300mm to 400mm, more preferably be about 350mm.The preferred profile of fan assembly and size also make the device compactness in an amount of air-flow that allows the user feel to feel nice and cool that produces from fan assembly.

Preferably, pedestal is roughly cylindrical.Such configuration makes the fan assembly with compact pedestal seem clean and tidy and consistent.This clean and tidy design is subjected to user and Consumer's welcome and favor very much.In addition, in the time of on being positioned over table or worktable, the desktop area that the pedestal of this fan assembly takies is less than the occupied space of other existing fan assembly.Nozzle takies the space of coming away from base extension in the desktop top, and does not block desktop or hinder the user near desktop.

Preferably, pedestal has the air intlet that at least one is arranged to basic and orthogonal axe.Preferably, pedestal has the sidewall that comprises described at least one air intlet.Air intlet is positioned at pedestal makes the configuration of pedestal and nozzle very flexible on every side, make air flow to pedestal, thereby make more air flow to this device generally from each point.More preferably, described at least one air intlet comprises a plurality of air intlets that extend along second axis with the basic quadrature of at first mentioning of described axis.In this configuration, preferably, device has the flow path that extends to an import from each air intlet, and the member that is used to produce by the air-flow of nozzle is led in this import, wherein, the import and this air intlet or the basic quadrature of each air intlet that lead to the member that is used to produce air-flow.This configuration provides the inlet air path that can reduce noise and frictional loss in system.

In any one party face of aforementioned aspects, nozzle can comprise coanda (Coanda) surface that is provided with near relief opening, and relief opening is arranged to through this coanda surface steering flow.The coanda surface is a kind of known surface, and the fluid stream that leaves near this surperficial delivery outlet shows Coanda effect through this surface.Fluid is tending towards flowing through closely the surface, almost " is close to " or " tightly attached " the surface.Coanda effect is proved, and the method for having put down in writing of entrainmenting has explained why main air flow is directed flowing through the coanda surface.The characteristic on relevant coanda surface and fluid flow through the description of the effect on coanda surface can be referring to document, " Reba, ScientificAmerican " in June, 1963 for example, 214 volumes, 84 to 92 pages.The air-flow suction streams that the coanda surface is flow through on use coanda surface, the outer air of fan assembly is crossed opening.

Among the present invention, the nozzle of air communication passing through fan device produces.In the following description, this air-flow will be called as main air flow.Main air flow goes out and preferably flows through the coanda surface from nozzle ejection by relief opening.Main air flow entrainments the relief opening ambient air of nozzle walk, and as the air amplifier main air flow and the air that entrainments is offered the user.The air that entrainments will be called as secondary streams here.Secondary streams other zone from room, zone or nozzle relief opening external environment condition on every side or around the fan assembly is sucked.Be directed flowing through the main air flow on coanda surface and sprayed or projection to the user as total air flow from the opening that limits by nozzle by the secondary streams that the air amplifier entrainments.For fan assembly, total air flow is enough to produce the air stream that is fit to cooling.

With respect to other equipment in the prior art, have the low turbulent flow and the benefit of the air-flow profile of linearity more to the air-flow of user output by this fan assembly.The air-flow of linear low turbulent flow is effectively from the point of release ejection, with respect to air-flow of the prior art, reach loss before the turbulent flow still less energy and speed still less.Benefit is for the user, even standoff distance far also can be felt nice and cool effect, and the whole efficiency of fan has improved.This means that the user can be chosen in apart from working zone or desk settles fan at a distance, and still can experience the nice and cool benefit that fan brings.

Advantageously, this device makes main air flow be exaggerated at least 15% owing to entrainmented nozzle relief opening ambient air, and the integral body output of energy held stationary.This fan assembly entrainment and the amplification characteristics make it have higher efficient than other equipment in the prior art.The air-flow that sprays from the opening that nozzle limits has and passes the approximate flat velocity profile of orifice size direction.Overall gas flow and profile can be described as the plug flow that the part area has laminar flow or local laminar flow.

Preferably, nozzle comprises loop.Its shape of nozzle is not limited by the requirement of the holding space of blade fan.In preferred embodiment, nozzle is a ring-type.By ring nozzle is set, fan can reach wide zone potentially.In another preferred embodiment, nozzle is at least part-circular.This configuration can provide various fan design to select, and increases user or Consumer's selection.

Preferably, the inner passage is continuous, more preferably is general toroidal.This makes the steady expedite air stream in the nozzle and reduce friction loss and noise.In this configuration, nozzle can reduce the complexity of fan assembly with single parts production, thereby reduces manufacture cost.

In preferred fan assembly, generation is configured to produce the air-flow that passes through nozzle of 400kPa pressure at least by the member of the air-flow of nozzle.Pressure is enough to overcome the compression that the relief opening by nozzle produces and the pressure that brings, and can be provided for allowing the user feel the output gas flow pressure of feeling nice and cool.More preferably, in use, the MAF that projects from fan assembly is at least 450l/s, and more preferred range is that 600l/s is to 700l/s.Advantageously, this mass flow rate can be throwed forward with laminar flow from the zone around opening and the nozzle relief opening, and can allow the user experience to be better than the nice and cool effect that blade fan brings.

In this preferred fan assembly, the member that is used to produce the air-flow by nozzle comprises by motor-driven impeller.This configuration provides a kind of fan that effective air-flow produces that has.More preferably, the device that is used to produce air-flow comprises dc brushless motor and mixed flow impeller.This configuration has reduced the frictional loss that motor brush causes and can reduce the carbon dust that the conventional motors center brush produces.Reducing carbon dust is favourable for environment cleaning or sensitive to pollution (for example hospital or have among the hypersensitive crowd).

Nozzle is rotatable or pivotable with respect to the base part or the other parts of fan assembly.This makes nozzle can be directed toward or deviate from the user as required.This fan assembly can be installed on desk, floor, wall or the ceiling board.This can increase allows the user feel the part of feeling nice and cool in the room.

Relief opening can be general toroidal.By the general toroidal relief opening is set, total air flow can be ejected into wide zone towards the user.Advantageously, in the room or be positioned at the light source at bracker fan place or natural light can arrive the user place by central opening.Relief opening can be concentric with the inner passage.This configuration has visual attraction, and the concentric locating of channelled relief opening is convenient to make.

Description of drawings

Referring now to accompanying drawing embodiments of the invention are described, wherein:

Fig. 1 is the front view of fan assembly;

Fig. 2 is the fragmentary, perspective view of the fan assembly of Fig. 1;

Fig. 3 is the partial side sectional view of the fan assembly of Fig. 1 along the A-A line;

Fig. 4 is the detailed amplification side partial cross-sectional of the fan assembly of Fig. 1; With

Fig. 5 is the sectional drawing of fan assembly along B-B line among Fig. 3 and the F direction among Fig. 3.

Embodiment

Fig. 1 shows the example of the fan assembly of observing previously from equipment 100.Fan assembly 100 comprises ring nozzle 1, and this ring nozzle 1 limits central opening 2.Comprise inner passage 10, relief opening 12 referring to figs. 2 and 3, nozzle 1 again and near the coanda surface 14 of relief opening 12.Coanda surface 14 is arranged so that the main air flow that leaves and be directed flowing through coanda surface 14 from relief opening 12 is exaggerated by Coanda effect.Nozzle 1 is connected to pedestal 16 with outer cover 18 and by this base supports.Pedestal 16 comprises and a plurality ofly passes outer cover 18 come-at-able selector buttons 20, and can control fan assembly 100 by selector button.Have height H, width W and depth D at the fan assembly shown in Fig. 1 and Fig. 3.Nozzle 1 is arranged to extend substantially orthogonally about axis.The height H of fan assembly is perpendicular to X-axis, and extends to the end away from the nozzle 1 of pedestal 16 from the end away from the pedestal 16 of nozzle 1.In this embodiment, the height H that fan assembly 100 has is about 530mm, but fan assembly 100 can have the height of any needs, for example about 475mm.Pedestal 16 and nozzle 1 all have perpendicular to height H and perpendicular to the width W of X-axis.Among Fig. 1, the width of pedestal 16 is illustrated and is labeled as W1, and the width of nozzle 1 is illustrated and is labeled as W2.Pedestal 16 and nozzle 1 have the degree of depth along X-axis direction.Among Fig. 3, the degree of depth of pedestal 16 is illustrated and is labeled as D1, and the degree of depth of nozzle 1 is illustrated and is labeled as D2.

Fig. 3, Fig. 4 and Fig. 5 have further provided the detail of fan assembly 100.The motor 22 that is used to produce the air-flow that passes nozzle 1 is positioned at pedestal 16.Pedestal 16 is roughly cylindrical, and in this embodiment the diameter (being width W 1 and depth D 1) that has of pedestal 16 for about 145mm.Pedestal 16 further is included in air intlet 24a, the 24b that forms in the outer cover 18.Motor casing 26 is positioned at pedestal 16.Motor 22 is supported by motor casing 26 and is remained in firm position by rubber mount or Sealing 28.

In the illustrated embodiment, motor 22 is direct current (DC) brushless electric machine.Impeller 30 is connected on the running shaft that extends outward from motor 22, and diffuser 32 is positioned at the downstream of impeller 30.Diffuser 32 comprises the fixedly static disc with helical blade.

Leading to the import 34 of impeller 30 communicates with the air intlet 24a, the 24b that form in the outer cover 18 of pedestal 16.The outlet 36 of diffuser 32 and the relief opening of impeller 30 communicate with hollow channel part that is positioned at pedestal 16 or pipeline, to produce from impeller 30 to nozzle the air-flow of 1 inner passage 10.Motor 22 is connected to and is electrically connected and the power supply part, and is controlled by the controller (not shown).Connection between controller and a plurality of selector button 20 makes the user can control fan assembly 100.

The feature of nozzle 1 will describe in conjunction with Fig. 3 and Fig. 4.Nozzle 1 be shaped as ring-type.In the present embodiment, the diameter of nozzle 1 is about 350mm, but nozzle can have the diameter of any needs, for example about 300mm.Inner passage 10 is for annular and form continuous circuit or pipeline in the nozzle 1.Nozzle 1 is formed by at least one wall that limits inner passage 10 and relief opening 12.In the present embodiment, nozzle 1 comprises inwall 38 and outer wall 40.In illustrated embodiment,

wall

38,40 is set to ring-type or rugosity, makes inwall 38 and outer wall 40 near each other.Inwall 38 and outer wall 40 limit relief opening 12 together, and relief opening 12 extends about X-axis.Relief opening 12 comprises the conical region 42 of convergent in outlet 44.Outlet 44 is included in slit or the spacing that forms between the outer wall 40 of the inwall 38 of nozzle 1 and nozzle 1.At outlet 44 places of relief opening 12, the spacing between the apparent surface of

wall

38,40 is selected at 1mm in the scope of 5mm.The fan performance characteristics of expectation are depended in the selection of spacing.In the present embodiment, 44 about 1.3mm are wide in outlet, and relief opening 12 is concentric with inner passage 10 with outlet 44.

Relief opening 12 is near coanda surface 14.Nozzle 1 in the illustrated embodiment further comprises the diffuser part that is positioned at downstream, coanda surface.Diffuser partly comprises diffuser surface 46, with the flow of further increase from the air stream of fan assembly 100 conveyings or output.In the example depicted in fig. 3, the whole configuration of relief opening 12 and nozzle 1 makes the cornerite (the angle subtended) between coanda surface 14 and the X-axis be about 15 °.This angle is selected such that air-flow can efficient stream cross coanda surface 14.Nozzle 1 in axial direction extends the distance about 5cm.The whole profile of diffuser surface 46 and nozzle 1 is based on wing shapes, and in the example shown, the extended distance of diffuser part be about nozzle 1 entire depth 2/3rds.

Fan assembly 100 described above moves in the following manner.When the user makes suitable selection with operation or startup fan assembly 100 from a plurality of buttons 20, transmit a signal or other message with drive motor 22.Motor 22 is activated thus, and air is drawn in the fan assembly 100 via air intlet 24.In a preferred embodiment, air is drawn into the speed of 20 to 30 liters of about per seconds, is preferably about 27l/s (rising per second).Air passes outer cover 18 and arrives the import 34 of impeller 30 along the path shown in the arrow F of Fig. 3.The air-flow that leaves from the outlet 36 of diffuser 32 and the exhaust of impeller 30 are divided into two strands of air-flows, and these two strands of air-flows pass inner passage 10 in the opposite direction.Be compressed when air-flow enters relief opening 12, and further compressed at outlet 44 places of relief opening 12.Be compressed in and produce pressure in the system.The pressure that the air-flow that passes nozzle 16 that motor 22 produces has is at least 400kPa.The air-flow that produces overcomes the pressure that compression produces, and air-flow is discharged by outlet 44 as main air flow.

The output of main air flow and be injected in

air intlet

24a, 24b place and produce the area of low pressure, and have effect with additional air suction fan assembly 100.The operation of fan assembly 100 causes high gas flow to pass nozzle 1 and flows out opening 2.Main air flow is directed flowing through coanda surface 14 and diffuser surface 46, and is exaggerated by Coanda effect.Secondary streams by entrainment from external environment condition, especially produce near the air the outward edge of outlet 44 peripheral regions and nozzle 1.The part secondary streams that is entrainmented by main air flow also can be directed and by diffuser surface 46.This secondary streams passes opening 2, combines the total air flow that penetrates forward from nozzle 1 to produce with main air flow at opening 2 places.

The combination of entrainmenting and amplifying make from the total air flow of the opening 2 of fan assembly 100 greater than near jeting area not such as coanda or amplify the air-flow of the fan assembly output on surface.

The amplification that produces and the air-flow of laminar flow type make the air-flow that continues be directed toward the user from nozzle 1.In a preferred embodiment, the MAF that penetrates from fan assembly 100 is at least 450l/s, preferably in 600l/s arrives the scope of 700l/s.Be about 400 to 500l/s apart from the user up to the flow of three times of orifice sizes (promptly about 1000 to 1200mm) distance.The flow velocity that total air flow has is about 3 to 4m/s (metre per second (m/s)).Can obtain higher speed by the cornerite that reduces between coanda surface 14 and the X-axis.Little angle makes total air flow concentrate more and more have the mode of guidance quality injected with a kind of.Such air-flow trends towards with higher speed and littler mass flow rate injected.Conversely, can obtain bigger mass flow rate by the angle that increases between coanda surface and the axle.Like this, the flow velocity of the air-flow of injection reduces, but the mass flow rate that produces increases.Therefore, can change the performance of fan assembly by the cornerite between change coanda surface and the X-axis.

The specific descriptions that the invention is not restricted to provide above.Various variations it will be apparent to those skilled in the art that.For example, fan can have different height or diameter.The pedestal of fan can have the different degree of depth, width and height with nozzle.Fan needn't be put on the table, and can freely put, and installs on the wall or on the ceiling board.The shape of fan is the arbitrary position of cooling blast or place and change as required.Portable fan can have littler nozzle, such as diameter 5cm.The member that is used to produce the air-flow by nozzle can be motor or other air jet equipment, for example can be any fan assembly that is used for producing in the room air stream, as blower or vacuum source.For example comprise such as the motor that exchanges (AC) induction machine or direct current (DC) brushless electric machine, but can also comprise the equipment of any suitable air movement or air transfer that for example pump or other provide directed fluid stream to produce the device of air-flow.The parts of motor can comprise diffuser or the auxiliary diffuser that is positioned at the motor downstream, to remedy in the electrical machinery cover and a part of static pressure loss by motor.

Can adjust the outlet of relief opening.The outlet of relief opening can widen or narrow to various spacings so that the air-flow maximization.The air-flow that relief opening sprays can be crossed the surface such as the coanda surface, and replacedly, air-flow can not crossed adjacent surface and penetrate forward by the relief opening injection and from fan assembly.Coanda effect can produce on a lot of different surfaces, maybe can be used in combination a lot of inside or exterior design to obtain the mobile of needs and to entrainment effect.

Can imagine the nozzle of other shape.For example, can use ellipse or " racing track " shape, wall scroll or single line or block nozzle.Owing to do not have blade, fan assembly that the path that arrives fan center's part is provided.This means such as lighting installation or clock and watch or the such optional feature of LCD display and can be arranged in the opening that nozzle limits.

Other parts can comprise pivotable or tiltable pedestal, are beneficial to the position that the user adjusts and moves nozzle.

Claims

1. on-bladed fan assembly that is used to produce air stream, described fan assembly comprises the nozzle that is installed on the pedestal, described pedestal holds the member that is used to produce by the air-flow of described nozzle, described nozzle comprises inner passage and the relief opening that is used to receive from the air-flow of described pedestal, it is injected that air communication is crossed described relief opening, described nozzle extends orthogonally basically about axis and limits opening, the air-flow suction that described fan assembly air outside is sprayed from described relief opening by described opening, wherein, each all has described nozzle and described pedestal along the degree of depth on the described axial direction, and wherein, the degree of depth of described pedestal is no more than the twice of the degree of depth of described nozzle.

2. require 1 described fan assembly as claim, wherein, the degree of depth of described pedestal, is preferably about 150mm in the scope of 200mm at 100mm.

3. fan assembly as claimed in claim 1 or 2, wherein, described fan assembly has the height away from the end of described pedestal that extends to described nozzle from the end away from described nozzle of described pedestal, with the width vertical with described height, described height and width are all perpendicular to described axis, and wherein, the width of described pedestal be no more than described nozzle width 75%.

4. on-bladed fan assembly that is used to produce air stream, described fan assembly comprises the nozzle that is installed on the pedestal, described pedestal holds the member that is used to produce by the air-flow of described nozzle, described nozzle comprises inner passage and the relief opening that is used to receive from the air-flow of described pedestal, it is injected that air communication is crossed described relief opening, described nozzle extends orthogonally basically about axis and limits opening, the air-flow suction that described fan assembly air outside is sprayed from described exhaust ports by described opening, described fan assembly has the height away from the end of described pedestal that extends to described nozzle from the end away from described nozzle of described pedestal, with the width vertical with described height, described height and width are all perpendicular to described axis, and wherein, the width of described pedestal be no more than described nozzle width 75%.

5. as claim 3 or 4 described fan assemblys, wherein, the width of described pedestal in 65% to 55% scope of the width of described nozzle, be preferably described nozzle width about 50%.

6. as claim 3,4 or 5 described fan assemblys, wherein, the height of described fan assembly, is preferably about 350mm in the scope of 400mm at 300mm.

7. the described fan assembly of arbitrary as described above claim, wherein, described pedestal is roughly cylindrical.

8. the described fan assembly of arbitrary as described above claim, wherein, described pedestal has at least one air intlet, and wherein said at least one air intlet is arranged to be substantially normal to described axis.

9. fan assembly as claimed in claim 8, wherein, described pedestal has the sidewall that comprises described at least one air intlet.

10. fan assembly as claimed in claim 8 or 9, wherein, described at least one air intlet comprises a plurality of air intlets that extend about second axis that is substantially normal to the described axis of at first mentioning.

11. as claim 8,9 or 10 described fan assemblys, comprise the flow path that extends to the import of leading to described member from each air intlet, described member is used to produce the air-flow by described nozzle, wherein, described import of leading to described member and this air intlet or each air intlet quadrature basically.

12. the described fan assembly of arbitrary as described above claim, wherein, described nozzle comprises loop.

13. the described fan assembly of arbitrary as described above claim, wherein, described nozzle is roughly ring-type.

14. the described fan assembly of arbitrary as described above claim, wherein, described nozzle is circular at least in part.

15. the described fan assembly of arbitrary as described above claim, wherein, described inner passage is continuous.

16. the described fan assembly of arbitrary as described above claim, wherein, described inner passage is roughly ring-type.

17. the described fan assembly of arbitrary as described above claim, wherein, described member is arranged to produce the air-flow that is at least 400kPa pressure by having of described nozzle.

18. the described fan assembly of arbitrary as described above claim, wherein, in use, the mass flow rate of the air of injection is at least 450l/s, and preferably in 600l/s arrives the scope of 700l/s.

19. the described fan assembly of arbitrary as described above claim, wherein, the described member that is used to produce the air-flow by described nozzle comprises by motor-driven impeller.

20. fan assembly as claimed in claim 18, wherein, the described member that is used to produce air-flow comprises dc brushless motor and mixed flow impeller.

21. roughly as above hereinafter described with reference to the accompanying drawings fan assembly.