CN102200147A

CN102200147A - Fan

Info

Publication number: CN102200147A
Application number: CN2011100705047A
Authority: CN
Inventors: 尼古拉斯.G.费顿; 凯文.J.西蒙斯
Original assignee: Dyson Ltd
Current assignee: Dyson Technology Ltd; Dyson Ltd
Priority date: 2010-03-23
Filing date: 2011-03-23
Publication date: 2011-09-28
Anticipated expiration: 2031-03-23
Also published as: JP5318138B2; US20110236228A1; GB2478926A; JP2011196382A; GB2478926B; GB201004813D0; CN102200147B; WO2011117598A1

Abstract

A portable fan includes a casing having an air inlet, and an air outlet having an interior passage for receiving an air flow, and a mouth for emitting the air flow. The interior passage extends about an opening through which air is drawn by the air flow emitted from the mouth. The fan also includes an impeller and a motor for rotating the impeller to generate an air flow between the air inlet and an air outlet which has a static pressure of at least 150Pa downstream from the impeller. A filter unit is detachably connected to the casing. A filter of the filter unit is located upstream of the air inlet to remove air-borne particulates from the air flow before it enters the casing.

Description

Fan

Technical field

The present invention relates to a kind of removable fan.Particularly, but not exclusive, the present invention relates to upward fan of a kind of ground or table, as desk fan, tower fan or flooring fan.

Background technique

Traditional family expenses fan generally includes and is installed as a cover blade or a fin that pivots, and this cover blade of rotation is to produce the drive unit of air stream.Moving and circulation creation " air-cooled " or gentle breeze of air stream, therefore, because heat dissipates by convection current and evaporation, the user has experienced cooling-down effect.Blade is formed and is positioned at blade in the cage, and this cage allows air stream by cover, and the user touches rotation blade when preventing to use fan simultaneously.

In hospital, it is very general using fan to keep nice and cool to patient, no matter is at public ward and isolation ward.For example, according to patient's medical condition, it is more desirable to reduce patient's body temperature with fan, rather than relies on medicine.When fan was assigned to a patient, therefore general apparent wind fan, as other medical equipment, need often be cleaned by the employee of nurse or other hospitals for medical equipment.The cleaning of vaned fan is very consuming time for the employee, because before cleaning fan, the cage that covers the blade of fan need be disassembled.This dismounting need be used screw-driver usually, and this can not be carried in hospital ward by the nurse.Generally, it is more convenient to engage professional cleaning service out-of-bounds to clean fan for hospital, though this may be very expensive.

WO2009/030879 has described a kind of fan component, and this fan component does not use the blade of band cage to launch air from fan component.On the contrary, fan component comprises pedestal, and this pedestal holds the impeller of motor driven so that main air flow is aspirated the ring nozzle that enters pedestal and be connected to pedestal, and this ring nozzle comprises circular groove, and main air flow gives off from fan by this groove.Nozzle defines central opening, and the main air flow suction that the air in the fan component local environment of living in is given off by this opening has strengthened air stream by this central opening.

The weak point that the fan that the time ratio cleaning that the outer surface of this " on-bladed " fan type of cleaning needs has cage to surround blade needs is a lot, because do not need to remove any expose portion of any part of fan with approaching fan.For example, the outer surface of fan may use cloth to wipe with totally.Although this clean level may be enough to the cleaning of on-bladed fan, wherein this fan is assigned to patient in the general hospital, when the on-bladed fan is assigned to isolation ward or infect the patient in control ward, still have the inner member cleaning that need to keep this pedestal, cross pollution when avoiding the on-bladed fan to be assigned to other patients.

Summary of the invention

The invention provides a kind of removable fan comprises: the housing that air inlet is arranged; Air outlet slit comprises inner passage that is used for admission of air stream and the mouth that is used for discharged air stream, and extend in around openings this inner passage, and wherein air is aspirated by this inner passage by the air stream that penetrates from mouth; Impeller and motor, this motor are used for rotary blade to produce air stream between air inlet and air outlet slit, and it has the static pressure of 150Pa at least at this impeller downstream position; And filter unit, being detachably connected to housing, filter unit comprises the filter of the upstream that is positioned at air inlet.

This filter unit is preferably the form of disposable filter unit, it is interchangeable, for example, and when fan is assigned to a different patient, when fan with patient when isolation ward moves on to public ward, or when filter has reached the life time terminal point of regulation.This can significantly reduce the relevant cost that uses fan and bring, and may need to move to the frequency that cleans outside the venue because can significantly reduce fan.This fan is arranged to the generation air stream, and this air stream has the static pressure of 150Pa at least, more preferably in 250 to 1500Pa scope, makes that air stream is not blocked when filter unit is connected to housing.

This filter unit can be positioned at the housing top or around housing, make filter bits in the upstream position of air inlet, to remove the suspended particulate in the impeller generation air stream before air stream enters housing.Filter unit preferably can be connected to housing manually, to allow the user filter unit is connected to fan, and pulls down this filter unit from fan then, need not tool using.

Filter preferably includes high-effect particle trapper (HEPA) filter.This filter also can comprise foam, carbon, paper, one or more in the fabric filter.This filter preferably has from 0.5 to 1.5 square metre of surface area in the scope,, this surface area is exposed to the air stream that is produced by fan.In order to reduce the volume of filter as far as possible, filter preferably is with fold to form filter, and wherein this filter is roughly annular to surround the air inlet of housing.In this case, filter unit can comprise two annular disks, and filter bits is between these two annular disks.When using filter unit, these dishes can be easy to wipe clean.Each dish can comprise the raised brim of extending towards another dish, is used to keep filter between dish.During the structure filter unit, this filter can adhere to dish at an easy rate.Those dishes can be regarded as forming at least a portion of filter unit together, and this filter adheres to dish during the structure filter unit.

This filter unit preferably includes at least one Sealing, is used to engage the fan outer surface.This can make filter unit and fan form one or more hermetic seal, with the air stream guaranteeing to produce by fan by filter, rather than filter around.Preferably, filter unit can be connected to housing and makes filter be positioned on the air inlet of fan.In a preferred embodiment, this filter unit is the form of sleeve, and this sleeve can be around the sidewall location of the pedestal of fan.The filter unit that forms form of sleeve can push away this annex or move on the fan at an easy rate as requested.This filter unit can comprise first Sealing of the pedestal that engages fan, and engages second Sealing of the air outlet slit of fan, makes air stream move through the filter unit between the Sealing and passes filter.Housing can be the form of pedestal, and it stands in ground with can need not supporter, and desk is on desk or other surfaces.

This filter unit can comprise outer cover, and this outer cover comprises a plurality of holes, and air enters in the filter unit by the hole.This outer cover can provide elementary, the relative process filter of filter unit, touch filter with the object that prevents to propagate in the air, such as insect or oarse-grained dust, can prevent that also the user from touching filter, particularly during filter unit is connected to fan, thereby avoid damaging filter.This outer cover is preferably transparent, the dust that the user can be seen caught by filter or the quantity of fragment.

Housing can comprise lower surface and sidewall, and wherein air inlet is arranged in housing sidewall.This air inlet extends around shell at least in part, and can comprise the array in hole.This housing can be columniform in shape substantially.Motor and impeller preferred orientation are in housing.The diffuser preferred orientation is at the downstream position of impeller.

Air outlet slit can be detachably connected to filter unit.When filter unit was connected to fan, the part of filter unit may be centered on by the part of air outlet slit.For example, air outlet slit can comprise base portion, and when air outlet slit was connected to filter unit, this base portion was positioned at the top of the part of filter unit.

Housing can have first connector, and air outlet slit can have second connector.Filter unit can comprise the 3rd connector and the 4th connector, the 3rd connector and second connector are roughly the same, be used for filter unit being connected to housing removedly with the first connector cooperation, the 4th connector is used for the second connector cooperation air outlet slit being connected to filter unit removedly with connector is roughly the same for the first time.This can allow air outlet slit directly to be connected to shell, or is used for filter unit and is connected between housing and the air outlet slit.Between filter unit and housing and the connection type between air outlet slit and the filter unit to be formed between air outlet slit and the housing connection type when not having filter unit identical.This helps filter unit to being connected of housing and air outlet slit because connect air outlet slit to the technology of housing with filter unit to pedestal and that air outlet slit is connected to the technology of filter unit is the same.

Description of drawings

Referring now to accompanying drawing preferred feature of the present invention is only described by way of example, in the accompanying drawings:

Fig. 1 is the front view of fan;

Fig. 2 is the perspective view of the pedestal of the fan among Fig. 1;

Fig. 3 is the perspective view of the air outlet slit of the fan among Fig. 1;

Fig. 4 is the following perspective view of part of the air outlet slit of the fan among Fig. 1;

Fig. 5 is the sectional drawing of the fan among Fig. 1;

Fig. 6 is the enlarged view of the part among Fig. 5;

Fig. 7 is the side view that is connected to the annex of fan among Fig. 1;

Fig. 8 is the perspective view that the annex among Fig. 7 is observed from the top;

Fig. 9 is the annex sectional drawing among Fig. 7;

Figure 10 is the perspective view of the fan among Fig. 1, and wherein the annex among Fig. 7 is connected to this fan; And

Figure 11 is the fan sectional drawing among Figure 10.

Embodiment

Fig. 1 is the front view of fan 10.Fan 10 is preferably the form of on-bladed fan 10, comprises pedestal 12 and the air outlet slit 14 that is connected to pedestal 12.Also with reference to figure 2, pedestal 12 comprises substantial cylindrical shell 16, and this shell comprises a plurality of air inlets 18, and wherein these air inlets 18 are the form that is formed on the hole of 16 li on shell, and by these holes, main air flow is by in external environment condition suction pedestal 12.In order to control the operation of fan 10, pedestal 12 also comprises a plurality of user-operable button and user-operable dial 22.In this example, the height of pedestal 12 is altitude range between 200 to 300mm, and the outer dia of shell 16 diameter range between 100 to 200mm.

As shown in Figure 3, air outlet slit 14 is an annular shape, and defines opening 24.The height of air outlet slit 14 200 to the scope of 400mm.Air outlet slit 14 comprises mouth 26, is used for air is emitted and by opening 24, this mouth 26 is positioned at the rear portion of fan 10 from fan 10.Mouth 26 extends around opening 24 at least in part and preferably surrounds opening 24.The inner periphery of air outlet slit 14 comprises that Koln reaches near surface 28 (this surface is positioned at the mouth 26 and mouth 26 guides from fan 10 discharged air through this surface), diffuser surface 30 (this surface is positioned at the downstream that Koln reaches surface 28) and guiding surface 32 (this surface is positioned at the downstream on diffuser surface 30).Diffuser surface 30 is arranged to, taperedly away from the central axis X of opening 24, by such mode to help flowing from fan 10 air discharged stream.Between 5 to 25 °, and in this example, be approximately 15 ° facing to the angle of the central shaft X of diffuser surface 30 and opening 24.It is angled with the effective transportation of further help cold air flow from fan 10 that guiding surface 32 is arranged to relative diffusion device surface 30.Guiding surface 32 preferably be arranged to the central axis X almost parallel of opening 24 with present a general planar to the air stream of discharging from mouth 26 and smooth surface roughly.Conical surface 34 with visual attraction is positioned at the downstream of guiding surface 32, terminates in end surface 36 places, the central axis X approximate vertical of this end surface and opening 24.Facing to the angle of the central axis X of conical surface 34 and opening 24 preferably about 45 °.Between 100 to 150mm, and is about 110mm in this example along the overall depth of the air outlet slit 14 of opening 24 central axis X bearing of trends.

Fig. 5 illustrates a sectional view by fan 10.Pedestal 12 comprises lower base member 38, intermediate base member 40 (being installed on the lower base member 38) and top base member 42 (being installed on the intermediate base member 40).Lower base member 38 has the bottom surface 43 of individual general planar.Intermediate base member 40 holds controller 44, and this controller is used to respond that pressing of the user's operating button 20 shown in Fig. 1 and 2 and/or user operate the manipulation of dial and the operation of controlling fan 10.Intermediate base member 40 also can hold swing mechanism 42, relative lower base member 38 swing intermediate base member 40 and the top base members 42 of this mechanism.Scope deflection period of each top base member 42 is preferably between 60 ° and 120 °, and is about 90 ° in this example.In this example, swing mechanism 46 is arranged to carries out 3 to 5 deflection periods of about per minute.For electric power being provided for fan 10, main power line 48 passes hole (this hole is formed in the lower base member 38) and extends.

In order to adjust the direction of main air flow from fan 10 dischargings, top base member 42 can tilt with respect to intermediate base member 40.For example, the lower surface of the upper surface of intermediate base member 40 and top base member 42 can be provided interconnect architecture portion, rises from intermediate base member 40 to prevent the top base member, allows top base member 42 to move relative to intermediate base member 40 simultaneously.For example, intermediate base member 40 and top base member 42 can comprise the L shaped member of interlocking.

Top base member 42 has open upper end, and comprises the array in hole 50, and it extends around top base member 42 at least in part.Hole 50 provides the air inlet 18 of pedestal 12.Top base member 42 holds impeller 52, and this impeller is used to aspirate main air flow and enters in the pedestal 12 by hole 50.Preferably, impeller 52 is a mixed flow impeller.Impeller 52 is connected to running shaft 54, and this axle stretches out from motor 56.In this example, motor 56 is DC Brushless Motor, and the speed of this motor can be operated dial 22 by controller 44 response users and be changed.The speed of motor maximum is preferably between 5000 to 10000rpm.Motor 56 is accommodated in the barrel motor, and this barrel comprises the top part 58 that is connected to bottom part 60.Barrel motor is maintained in the top base member 42 by barrel motor retainer 62.The upper end of top base member 42 comprises cylindrical outer surface 64.Barrel motor retainer 62 is connected to the open upper end of top base member 42, for example, connects by buckle.Motor 56 and its barrel motor are not rigidly connected to barrel motor retainer 62, move to allow motor 56 some in top base member 42.

Get back to Fig. 2, the upper end of top base member 42 comprises two pairs of opening slots 66, and this opening slot forms by removing part outer surface 64, to stay " otch " part of shaping.The open upper end of the upper end of each groove 66 and top base member 42 is carried out open communication.Opening slot 66 is arranged to from the open upper end of top base member 42 and extends downwards.The bottom part of groove 66 comprises the track 68 of circumferential extension, and this track has the upper and lower portion part that is limited by the outer surface 64 of top base member 42.Every pair of opening slot 66 is located symmetrically about the upper end of top base member 42, and every pair becomes spaced apart circumferentially each other.Annular seat component 69 is extended at the external surface peripheral of top base member 42, and is positioned at the below of the track 68 of groove 66.

The cylindrical outer surface 64 of top base member 42 upper ends also comprises a pair of wedge member 70, and this wedge member has tapering part 72 and sidewall 74.Wedge member 70 is positioned on the opposite side of top base member 42, and each wedge member 70 is arranged in the notch portion of respective outer surfaces 64.

Barrel motor retainer 62 comprises crooked tab portion 76,78, and its upper end from barrel motor retainer 62 extends internally.Each crooked tab portion 76,78 is overlapping with the part of barrel motor top part 58.Like this, in the process that moves and operate, barrel motor retainer 62 and crooked tab portion 76,78 play fixing and keep barrel motor effect on the throne.Especially, if fan 10 is reversed, barrel motor retainer 62 prevents that barrel motor from shifting out and fall to air outlet slit 14.

With reference to figure 5, one in barrel motor top part 58 and the bottom part 60 comprises diffuser 80 again, and this diffuser is the form that has the fixed tray of helical fin 82, and is positioned at the downstream of impeller 52.When the line that vertically passes top base member 42 is dissectd, one in the helical fin 82 has roughly reverse U-shaped cross-section.Helical 82 is formed, and makes the electric power conjunction cable can pass helical 82 and arrives motor 56.

Barrel motor is positioned at impeller housing 84 or mounted thereto.Impeller housing 84 is installed in again on a plurality of angle intervals supporting elements 86, is three supporting elements in this example, and these supporting elements are arranged in the top base member 42 of pedestal 12.The shade 88 that is roughly frustoconical is arranged in impeller housing 84.This shade 88 preferably is connected to the outer rim of impeller 52, and is so shaped that the outer surface of shade 88 presses close to, but does not contact the internal surface of impeller housing 84.Roughly inlet component 90 is connected to the bottom of impeller housing 84 ringwise, enters in the impeller housing 84 with the guiding main air flow.The top of impeller housing 84 comprises roughly air outlet slit 92 ringwise, and this outlets direct air stream is discharged into air outlet slit 14 from impeller housing 84.

In order to reduce the noise emissions from pedestal 12, preferred, pedestal 12 also comprises the noise suppression member.In this example, the top base member 42 of pedestal 12 comprises plate-like foam member 94, and it is positioned near the base portion of top base member 42 and is positioned at the roughly ring-type foam member 96 of impeller housing 84.

The flexible seal member is installed on the impeller housing 84.Isolate by taking out from the primary air of external environment condition and the air outlet slit 92 air discharged stream of diffuser 80 and impeller 52, the flexible seal member stops air to turn back to air inlet member 90 along the passage of the extension between shell 16 and the impeller housing 84.Sealing component preferably includes lip seal 98.The shape of this lip seal 98 is annulars and surrounds impeller housing 84, outwards extends towards shell 16 from impeller housing 84.In listed examples, the radial distance that the diameter of sealing component arrives between the shell 16 greater than impeller housing 84.Like this, the exterior section 100 of sealing component is biased against shell 16 and causes extending along the internal surface of shell 16, and forms sealing.The lip seal 98 of preferred embodiment when away from impeller housing 84 and when shell 16 extends, is reduced and is narrowed down towards terminal 102.Lip seal 98 is preferably formed by rubber.

Sealing component comprises that also guide portion 104 arrives motor 56 with guiding electric power conjunction cable 106.The guide portion 104 of illustrated embodiment forms the shape of the axle collar and can be grommet.Cable 106 is a ribbon cable, and this cable is connected to motor at binding site 108 places.Cable 106 extends from motor 56, passes the bottom part 60 of barrel motor by helical fin 82.The passage of cable 106 meets the shape of impeller housing 84, and guide portion 104 is shaped as and makes cable 106 pass the flexible seal member.The guide portion 104 of sealing component makes that cable 106 energy are clamped and remains in the top base member 42.Cover capsule 110 is received cable 106 at the bottom of top base member 42 partial content.

Fig. 6 shows the sectional view that passes air outlet slit 14.Air outlet slit 14 comprises annular outer cover body section 120, and it is connected to annular inner housing section 122 and extends around annular inner housing section 122.Each can form by a plurality of attachment portions in these sections, but in this embodiment, and each frame section 120 and inner housing section 122 be by separately, single molding part formation.Inner housing section 122 limits the central opening 24 of air outlet slit 14, and has outer peripheral surfaces 124, and this surface is shaped to limit Koln and reaches surface 28, diffuser surface 30, guiding surface 32 and conical surface 34.

Frame section 120 and inner housing section 122 limit the ring-shaped inner part passage 126 of air outlet slit 14 together.Like this, ring-shaped inner part passage 126 gets around mouthful 24 extensions.Ring-shaped inner part passage 126 is limited by the inner periphery surface 130 of the inner periphery surface 128 of frame section 120 and inner housing section 122.As shown in Figure 4, frame section 120 comprises base portion 132, and this base portion has internal surface 134.Form two pairs of projectioies 136 and a pair of slope 132 on the internal surface 134 of base portion 132, to be connected to the upper end of top base member 42.Each projection 136 and each slope 138 are upright from internal surface 134.Like this, base portion 132 is connected to the open upper end of the top base member 42 and the barrel motor retainer 62 of pedestal 12, and is positioned at its top.Each is positioned at around the frame section 120 and the space to projection 136, each is to projection 136 and the upper end of top base member 42 each be corresponding to the arranged spaced of opening slot 66 like this, and this position to slope 138 is corresponding with this position to wedge member 70 of the upper end of top base member 42 like this.

The base portion 132 of frame section 120 comprises the hole, and by this hole, main air flow enters the inner passage 126 of air outlet slit 14 from the open upper end of the upper end of top base member 42 and barrel motor retainer 62.

The mouth 26 of air outlet slit 14 is positioned at fan 10 rear portions.Mouth 26 is overlapping by the outer periphery surface 124 of the inner periphery surface 128 of frame section 120 and inner housing section 122 respectively, or in the face of 140,142 qualifications of part.In this example, mouth 26 is roughly annular, and when along diameter pass air outlet slit 14 a straight line when cutting open, as shown in Figure 4, have the cross section that roughly takes the shape of the letter U.In this example, the lap 140 of the inner periphery surface 128 of frame section 120 and the outer periphery surface 124 of inner housing section 122,142 are so shaped that mouth reduces towards outlet 144, and wherein this outlet 144 is arranged to guide main air flow to reach surperficial 28 tops to Koln.Outlet 144 is the form of circular groove, preferably has geostationary width, and this width is between 0.5 to 5mm.In this example, the width of outlet 144 is about 1mm.Around mouth 26, spacing means can be spaced apart by the lap 140,142 of difficult to articulate 26 spaced apart outer periphery surface 124 with the inner periphery surface 128 that forces frame section 120 and inner housing section 122, makes the width of outlet 144 remain on desirable level.The inner periphery surface 128 of these spacing meanss and frame section 120 or the outer periphery surface 124 of inner housing section 122 can be one.

With reference to figure 3 and Fig. 4, for making air outlet slit 14 be connected to pedestal 12, air outlet slit 14 is put upside down and the base portion 132 of air outlet slit 14 is positioned at the open upper end top of top base member 42 from orientation as shown in Figure 4.Relative pedestals 12 alignment of air outlet slit 14 make the projection 136 of base portion 132 of air outlet slit 14 directly orientate as with top base member 42 opening slots 66 open upper end and aim at.On this position, a pair of slope 138 of base portion 132 is directly aimed at a pair of wedge member 70 of top base member 42.Then, air outlet slit 14 is pushed on the pedestal 12, and projection 136 is positioned on the base portion of opening slot 66 like this.The sealing component 69 of pedestal 12 engages to form gas tight seal between pedestal 12 and air outlet slit 14 with the internal surface 134 of the base portion 132 of air outlet slit 14.

For fixed air exports 14 to pedestal 12, air outlet slit 14 is equivalent to pedestal 12 and rotates along clockwise direction, makes the projection 136 extending circumferentially tracks 68 along opening slot 66 move.Air outlet slit 14 is with respect to the rotation of pedestal 12, and the elastic strain of the part of the open upper end by top base member 42 also promotes the tapered portion 72 of climbing up wedge member 70 in slope 138 and slides thereon.Along with the lasting rotation of air outlet slit 14 with respect to pedestal 12, slope 138 is forced to sidewall 74 tops of wedge member 70.The open upper end of top base member 42 is released, and makes roughly radially aligned of slope 138 and wedge member 70.Therefore, the sidewall 74 of wedge member 70 prevents air outlet slit 14 with respect to the unexpected rotation of pedestal 12, and projection 136 is positioned at track 68 and prevents that air outlet slit 14 from being lifted from pedestal 12.So the rotation of air outlet slit 14 relative pedestals 12 does not need too much rotating power and user can carry out the assembling of fan 10.

Be operation fan 10, the user presses suitable button on the bottom base 12, responds this operation, and controller 44 activates motor 56 with rotary blade 52.The rotation of impeller 52 makes main air flow be drawn through air inlet 18 and enters pedestal 12.According to the speed of motor 56, producing main air flow by impeller 52 may be 20 to 30 liters of per second.Main air flow can be at least 150 handkerchiefs at the pressure at outlet 92 places of pedestal 12, and preferably between 250 to 1500 handkerchiefs.Main air flow passes through impeller housing 84, the inner passage 126 of the open upper end of the upper end of top base member 42 and barrel motor retainer 62 to enter air outlet slit 14 successively.The main air flow that gives off from air outlet slit 92 normally upwards and forwards to.

In air outlet slit 14, main air flow is divided into two strands of air streams, and it is advanced around the central opening 24 of air outlet slit 14 in the opposite direction.Part main air flow enters air outlet slit 14 along side surface direction (roughly with the X-axis quadrature), enters inner passage 126 in the situation lower edge side surface direction without any significantly guiding.Yet the other part of main air flow enters air outlet slit 14 along the direction that is parallel to X-axis, and the air stream of crooked fin 76 these parts of guiding of barrel motor retainer 62 is so that air stream can enter inner passage 126 along side surface direction.When air stream passes inner passage 126, air enters in the mouth 26 of air outlet slit 14.Enter the preferred roughly evenly distribution around the opening 24 of air outlet slit 14 of air stream of mouth 26.In each section of mouth 26, the flow direction of described air stream part is by roughly reverse.The air stream part penetrates by the restriction of the tapered section of mouth 26 and from exporting 98.

The Koln that the main air flow of discharging from mouth 26 is directed into air outlet slit 14 reaches surperficial 28 tops, causes the inferior air stream that the air carried secretly from external environment condition (particularly from the outlet 98 of mouth 26 and the peripheral region, rear of air outlet slit 14) produces.This time air stream passes the central opening 24 of air outlet slit 14, and it combines with main air flow and produces total air stream (or total air flow) in this position, launches forward from air outlet slit 14.According to the speed of motor 56, can be in 300 to 400 liters of per second scopes from the mass flow rate of the air stream that fan 10 is launched forward, and the top speed of air stream can be 2.5 in the 4m/s scope.

Main air flow has been guaranteed air stream process on diffuser surface 30 equably along the even distribution of the mouth 26 of air outlet slit 14.By the zone that moving air stream expands through control, diffuser surface 30 makes air stream mean velocity be reduced.Diffuser surface 30 allows the expansion of air stream to take place gradually to the less relatively angle of the X-axis of opening 24.Otherwise, coarse or disperse fast and will make the air stream multilated, produce eddy current in expansion area.This eddy current can cause the increase of turbulent flow and coherent noise in the air stream, and this is unfavorable, especially at the family expenses product for example in the situation of fan.Surpassing diffuser surface 30 forwards tends to continue to disperse to the air stream of emission.Guiding surface 32 is concentrated air stream towards X-axis, wherein should extend in X axis on the surface.Therefore, air stream can blaze abroad effectively from air outlet slit 14, makes just can feel air stream apace in several meters distance of fan 10.

Fig. 7 to 9 illustrates the external accessory of fan 10, and annex is the form of filter element 200, and it is detachably connected to fan 10, to allow shifting out filter unit 200 when cleaning or change.

Filter unit 200 is the form of substantial cylindrical sleeve, and this sleeve is positioned at around the top base member 42 of pedestal 12, makes filter unit 200 be positioned on the air inlet 18 of fan 10, shown in Figure 10 and 11.Before main air flow entered the pedestal 12 of fan 10, this allowed filter unit 200 that the atmosphere suspended particulate is removed from main air flow.

Filter unit 200 comprises that general toroidal filter 202 is to remove the atmosphere suspended particulate in the main air flow.Filter 202 is preferably radially high-effect particle trapper (high energy particle arrester, the HEPA) filter with pleat.Filter 202 has surface area, and this zone is exposed to the main air flow of coming in that is produced by fan 10, wherein should arrive 1.5m 0.5 in the zone ²Scope, and in this example, be 1.1m ²About.Filter 202 is centered on by cylindrical jacket 204.This outer cover is preferably formed by plastic materials, to protect filter 202 and to allow the user not need just energy processing filters unit 200 of contacted filter 202 thus.Cover is 204 preferably transparent, with in use or after the regular period uses, allows the user visually to detect the state of filter 202.Cover 204 comprises a plurality of holes (not shown), enters filter unit 200 by this hole main air flow, and provides the comparatively coarse first order of filter unit 200 to filter to prevent that relatively large aerosol body or insect from entering filter unit 200 thus.Filter unit 200 can also comprise extra filtering medium, and it is at filter 202 and cover between 204, perhaps the downstream of filter 202.For example, this extra media can comprise foam, carbon, one or more in paper or the fabric.

Filter 202 and cover 204 are clipped between two annular slabs 206,208 of filter unit 200.Each plate 206,208 comprises circular inner edge 210 and rounded outer edge 212, and this both's part is extended towards another plate 206,208.Filter 202 and cover 204 are positioned between the edge 210,212 of plate 206,208, and preferably arrive plate 206,208 with adhesive.

Upper plate 206 comprises the axle collar 214 down, is positioned at the inner radial of the inward flange 210 of upper plate 206.The following axle collar 214 axially extends downwards from upper plate 206.The internal diameter of air outlet slit 14 base portions 132 of the internal diameter of the following axle collar 214 and fan 10 is roughly the same.Similar to the base portion 132 of air outlet slit 14, the internal surface of the following axle collar 214 comprises two pairs of projectioies 216 and a pair of slope (not shown) upper end with the top base member 42 of the pedestal 12 that is connected to fan 10.The projection 216 of the projection 216 of the following axle collar 214 and the shape on slope and the following axle collar 214 and the projection 136 and the slope 138 of angle intervals between the slope and air outlet slit 14 base portions 132 are roughly the same.

Upper plate 206 also comprises the axle collar 218, and axle collar is positioned at down the inner radial of the axle collar 214 on this.The last axle collar 218 axially extends upward from the inner periphery of upper plate 208.The external diameter of the outer surface 64 of the open upper end of the external diameter of the last axle collar 218 and top base member 42 is roughly the same.Similar to top base member 42, the last axle collar 218 comprises two pairs of opening slots 220 and a pair of wedge member 222.Opening slot 220 is roughly the same with the opening slot 66 of top base member 42 outer surfaces 64, and the interval between interval between the opening slot 220 and the opening slot 66 is roughly the same.Wedge member 222 is much the same with the wedge member 70 of top base member 42 outer surfaces 64, and the interval between interval between the wedge member 222 and the wedge member 70 is roughly the same.First annular seal 224 of filter unit 200 extends around the outer surface of the last axle collar 218, and is positioned at below the extending circumferentially track 226 of groove 220.

The axle collar 214,218 preferred and upper plate 206 one forms, it is preferably formed by plastic materials.

Lower plate 208 comprises the less relatively axle collar 228, and this axle collar axially extends downwards from the inward flange 210 of lower plate 208.The axle collar 228 comprises the extending circumferentially groove, and this groove is positioned on its internal surface.Second lip ring 230 of filter unit 200 is positioned at this groove.The axle collar 228 is preferred and lower plate 208 is integrally formed, and it is preferably formed by plastic materials.

For making filter unit 200 be connected to fan 10, at first, air outlet slit 14 is separated from pedestal 12.For from pedestal 12 separation of air outlet 14, air outlet slit 14 by pedestal 12 relatively with the side when air outlet slit 14 is connected to pedestal 12 in the opposite direction (counterclockwise) turn.Under the suitable moment manually-operable of user, the upper end of top base member 42 causes that again local radial curves inwardly.This local deformation of top base member 42 allows slope 138 to rotate on wedge member 70, simultaneously the projection 136 track 68 same moved further along groove 66.In case projection 136 arrives the end of track 68, air outlet slit 14 can be mentioned from pedestal 12.

Although will need bigger power to be applied on the air outlet slit 14 than connecting, thereby can select the elasticity of top base member 42 can manually finish separation of air outlet 14 from pedestal 12 separation of air outlet 14.

Then, the user is connected to pedestal 12 with filter unit 200.Filter unit 200 being connected to the technology of pedestal 12 is identical with the technology that air outlet slit 14 is connected to pedestal 12 in itself.The user is positioned at the open lower end of the axle collar 228 of lower plate 208 on the open upper end of top base member 42, reduces filter unit 200 around pedestal 12 then.When the bottom of the following axle collar 214 of upper plate 206 was positioned at the tight top of open upper end of top base member 42, user's revolving filter unit 200 was directly orientated as with the open upper end of the opening slot 66 of top base member 42 up to the projection 216 of filter unit 200 and is aimed at.On this position, this of filter unit directly aimed at wedge member 70 with this of top base member 42 slope.Then, just can further promote filter unit 200 to pedestal 12, make the projection 216 of filter unit 200 be positioned at the base portion place of the opening slot 66 of pedestal 12.For filter unit 200 is fixed on the pedestal 12, filter unit 200 is rotated in a clockwise direction by relative pedestal 12, makes the projection 216 extending circumferentially tracks 68 along opening slot 66 move.Local elasticity's distortion by top base member 42, filter unit 200 have also promoted the slope with respect to the rotation of pedestal 12 and have climbed up the tapered portion 72 of wedge member 70 and and slide thereon.Along with the lasting rotation of filter unit 200 with respect to pedestal 12, the slope is forced to sidewall 74 tops of wedge member 70.The open upper end of top base member 42 is released, and makes roughly radially aligned of slope and wedge member 70.Therefore, the sidewall 74 of wedge member 70 prevents filter unit 200 with respect to the unexpected rotation of pedestal 12, and projection 216 is positioned at track 68 and prevents that filter unit 200 from being lifted from pedestal 12.

As shown in figure 11, when filter unit 200 was installed to pedestal 12, second sealing component 230 of filter unit 200 was positioned at pedestal 12 air inlets 18 belows, and the outer surface of engaged with base 12 is to form gas tight seal between pedestal 12 and filter unit 200.Equally as shown in figure 10, when filter unit 200 was connected to pedestal 12, the user still can be near the button 22 and the user-operable dial 22 of pedestal 12.

Then, air outlet slit 14 is installed to filter unit 200.Air outlet slit 14 in essence is identical with air outlet slit 14 to being connected of pedestal 12 to the connection of filter unit 200.The base portion 132 of air outlet slit 14 is positioned at the last axle collar 218 tops of filter unit 200.Relative pedestals 12 alignment of air outlet slit 14 make the projection 136 of base portion 132 of air outlet slit 14 directly orientate as with the open upper end of the opening slot 220 of filter unit 200 and aim at.Then, air outlet slit 14 is pushed on the filter unit 200, makes projection 136 be positioned on the base portion of opening slot 220.First sealing component 224 of filter unit 200 engages to form gas tight seal between filter unit 200 and air outlet slit 14 with the internal surface 134 of the base portion 132 of air outlet slit 14.Once more, arrive filter unit 200, air outlet slit 14 is rotated along clockwise direction with respect to filter unit 200, make projection 136 move along the extending circumferentially track 226 of the opening slot 220 of filter unit 200 for fixed air outlet 14.Air outlet slit 14 is with respect to the rotation of filter unit 200, local elasticity's deformation of the last axle collar 218 by filter unit 200, and the tapered portion of the wedge member 222 that also promotes to climb up filter unit 200 in slope 138 is also slided thereon.Along with the lasting rotation of air outlet slit 14 with respect to filter unit 200, slope 138 is forced to the sidewall top of wedge member 220.The last axle collar 218 of filter unit 200 is released, and makes roughly radially aligned of slope 138 and wedge member 220.Therefore, the sidewall 74 of wedge member 200 prevents air outlet slit 14 with respect to the unexpected rotation of filter unit 200, and projection 136 is positioned at track 226 and prevents that air outlet slit 14 from being lifted from filter unit 200.

The composition that the assembling of fan 10 and filter unit 200 obtains is shown in Figure 10 and 11.Filter unit 200 forces main air flow to pass the filter 202 of filter unit 200 with the gas tight seal that pedestal 12 and air outlet slit 14 form, and before entering pedestal 12 at it, removes the particulate that the air in the main air flow carries.Except purifying the air in fan 10 local environments, will air wherein main air flow enters pedestal 12 before carry particulate and remove and obviously to lower dust and the impurities accumulation speed to fan 10 inner bodies, thereby reduce fan 10 and need the frequency that clean.In order to clean and to change, by air outlet slit 14 is separated (it is carried out in the same mode of the mode that removes from pedestal 12 with air outlet slit 14) and subsequently filter unit 200 separated from pedestal 12 from filter unit 200, filter unit 200 can easily be changed.This executive mode is not used any instrument, can be not only soon but also operation easily.In the time again need not using filter unit 200, by filter unit 200 is separated and directly air outlet slit 14 reinstalled on the pedestal 12 from pedestal 12, filter unit 200 just can be from removal fast on the fan 10.

Claims

1. a removable fan comprises:

The housing that air inlet is arranged;

Air outlet slit comprises inner passage that is used for admission of air stream and the mouth that is used for discharged air stream, and extend in around openings this inner passage, and wherein air is aspirated by this inner passage by the air stream that penetrates from mouth;

Impeller and motor, this motor are used for rotary blade to produce air stream between air inlet and air outlet slit, and this air stream has the static pressure of 150Pa at least at this impeller downstream position; And

Filter unit is detachably connected to housing, and filter unit comprises the filter of the upstream that is positioned at air inlet.

2. the fan described in claim 1, wherein, motor and impeller are arranged to and produce the air stream with the static pressure in 250 to 1500Pa scopes.

3. the fan described in claim 1, wherein, filter unit comprises at least one Sealing of the outer surface that is used for engage.

4. the fan described in claim 1, wherein, filter unit is the form of sleeve, its can be positioned on housing around.

5. the fan described in claim 1, wherein, the shape of filter is a general toroidal.

6. the fan described in claim 5, wherein, filter unit comprises two annular disks, filter is positioned between these two annular disks.

7. the fan described in claim 6, wherein, each dish comprises that the raised brim of extending towards another dish is to keep filter between dish.

8. the fan described in claim 6, wherein, filter adheres to dish.

9. the fan described in claim 1, wherein, filter unit comprises filter hood, filter adheres to filter hood.

10. the fan described in claim 1, wherein, filter unit comprises outer cover, this outer cover comprises a plurality of holes.

11. the fan described in claim 1, wherein, housing comprises lower surface and sidewall, and wherein air inlet is arranged in the sidewall of housing.

12. the fan described in claim 1, wherein, air inlet extends around housing at least in part.

13. the fan described in claim 1, wherein, air inlet comprises the array in hole.

14. the fan described in claim 1, wherein, housing be roughly in shape columniform.

15. as each the described fan in the above-mentioned claim, wherein, air outlet slit is detachably connected to filter unit.

16. as each the described fan in the claim 1 to 14, wherein, filter unit comprises first Sealing of engage, and engages second Sealing of air outlet slit.