CN103375440A - Bladeless fan - Google Patents

Bladeless fan Download PDF

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Publication number
CN103375440A
CN103375440A CN2012101270812A CN201210127081A CN103375440A CN 103375440 A CN103375440 A CN 103375440A CN 2012101270812 A CN2012101270812 A CN 2012101270812A CN 201210127081 A CN201210127081 A CN 201210127081A CN 103375440 A CN103375440 A CN 103375440A
Authority
CN
China
Prior art keywords
exhaust outlet
collar
air
fan
blade fan
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN2012101270812A
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Chinese (zh)
Other versions
CN103375440B (en
Inventor
岑建力
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
YANG DINGPING
Original Assignee
YANG DINGPING
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by YANG DINGPING filed Critical YANG DINGPING
Priority to CN201210127081.2A priority Critical patent/CN103375440B/en
Priority to PCT/CN2012/076522 priority patent/WO2013159424A1/en
Publication of CN103375440A publication Critical patent/CN103375440A/en
Application granted granted Critical
Publication of CN103375440B publication Critical patent/CN103375440B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/601—Mounting; Assembling; Disassembling specially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
    • F04F5/16—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
    • F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
    • F04F5/46—Arrangements of nozzles

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The invention discloses a bladeless fan. The bladeless fan comprises an air channel and an air compressed fan; the air channel is formed by a first lantern ring and a second lantern ring through abutting joint along the axis direction; an empty chamber is formed between the two lantern rings after the abutting joint; the first lantern ring is provided with air outlets which are uniformly formed along the first lantern ring circumferentially; the air outlets are divided into annular inner ring air outlets and outer ring air outlets; the surface of the inner side of the first lantern ring is formed into the state of facing the air outlets and gradually increasing; a casing of the air compressed fan is communicated with the air channel; air flow is compressed into the air channel through the air compressed fan and then discharged through the air outlets. According to the bladeless fan, the annular air channel is provided with the air outlets which do not face the protruding surface and directly erupt to enable the air flow to be no longer attached to the protruding surface after the air flow is out of the air outlets, so that the air outlets can adapt to the requirements of various different shapes and flow directions of the air flow flexibly.

Description

A kind of without blade fan
Technical field
The present invention relates to a kind of fan, particularly a kind of without blade fan.
Background technique
Need in use to arrange the protecting wire net of cage shape with the fan of fan blade, not only make efficiency is low for protecting wire net, cost is high, and Safety performance can not guarantee especially children are had certain danger fully.
Also adopted without blade fan in the prior art, namely substituted early stage fan-leaf fan with annular passage, the air channel has the exhaust outlet around the air channel that points to an end, the surface that exhaust outlet has projection can produce negative pressure with the outer gas stream of the attraction annular passage the other end, thereby produces the effect that air-flow amplifies.
Above-mentioned without blade fan for the exhaust outlet projection, the shortcoming of prior art is: although the surface energy of annular exhaust outlet projection plays certain air-flow amplification, but the surface of projection needs the surface state that can reach according near the material the exhaust outlet, material and the settings such as flow velocity of air-flow, the factor that relates to is a lot, therefore often the amplification effect of air-flow is not fairly obvious in the application of reality, and the main source of air-flow remains the blower fan that is connected with the air channel; On the other hand, the needs that amplify in order to adapt to air-flow so that the exhaust outlet in air channel has single structure, can't be exported the air-flow of suitable sectional shape, the flow direction according to the actual needs.
Summary of the invention
The present invention is in order to overcome above-mentioned defective of the prior art, to set out the air port by the surface without projection at annular passage, adapting to neatly the requirement of various different airflow shaped, the flow direction.
For achieving the above object, the invention provides a kind of without blade fan, comprise: the air channel, it is formed along the axial direction docking by first collar and second collar, first collar, second collar are mutually corresponding annular groove, form a cavity after the docking between its two collar, first collar is provided with exhaust outlet, exhaust outlet circumferentially evenly arranges along first collar, exhaust outlet is divided into interior ring exhaust outlet and the outer shroud exhaust outlet of annular, and the surface of the annular groove inside part of first collar is the state that enlarges gradually towards exhaust outlet; The blower fan of calming the anger, fan casing and described air channel connect, and the air-flow blower fan of being calmed the anger is pressed into described air channel and discharges by described exhaust outlet.
In the technique scheme, the surface of the annular groove inside part of first collar can be the conical surface of smooth gradual change expansion.
In the technique scheme, the surface of the annular groove inside part of first collar can also be the stepped conical surface that enlarges step by step.
In the technique scheme, separated by the thin slice of cutting apart of annular between interior ring exhaust outlet and the outer shroud exhaust outlet, cut apart thin slice and be connected with the first collar one by the radially gusset along the circumferential spaced set of thin slice, the angle of inclination of cutting apart thin slice is set according to default air-out direction.
In the technique scheme, the surface of the annular groove inside part of first collar can arrange auxiliary air-outlet along circumferentially even interval.
In the technique scheme, interior ring exhaust outlet and outer shroud exhaust outlet are arranged at respectively on the transitional surface between the stepped conical surface that enlarges step by step, and respectively even interval arranges between the exhaust outlet of same ring.
In the technique scheme, be crisscross arranged between exhaust outlet corresponding to inner and outer rings, so that be not prone to mutual interference between the inner and outer rings air-out air-flow, particularly the air-flow at the inner and outer rings exhaust outlet exists in the situation of interfering.
Compared with prior art, the present invention passes through the exhaust outlet at the direct ejection air-flow of annular passage, so that adapt to neatly the requirement of various different airflow shaped, the flow direction behind the flow shedding exhaust outlet.
Description of drawings
Fig. 1 is that the present invention is without the exploded perspective view (backsight) in blade fan embodiment 1 air channel;
Fig. 2 is that the present invention is without the main sectional view in blade fan embodiment 1 air channel;
Fig. 3 is that the present invention is without the exploded perspective view (backsight) in blade fan embodiment 2 air channel;
Fig. 4 is that the present invention is without the main sectional view in blade fan embodiment 2 air channel;
Fig. 5 is that the present invention is without the exploded perspective view (forward sight) in blade fan embodiment 3 air channel;
Fig. 6 is that the present invention is without the main sectional view in blade fan embodiment 3 air channel;
Fig. 7 is that the present invention is without blade fan embodiment 1 exploded perspective view (comprising air channel, blower fan, the first centrifugal impeller and base etc.);
Fig. 8 is that the present invention is without the stereogram of the second centrifugal impeller of blade fan embodiment 1;
Fig. 9 is that the A-A of Fig. 8 is to sectional view;
Figure 10 is the present invention without main sectional view of the blade fan embodiment 1 (bilobed wheel, be not with base);
Figure 11 is that the present invention is without blade fan embodiment 1 main sectional view (single impeller, band base);
Figure 12 is that the present invention is without blade fan embodiment 1 stereogram (base is fixing clamp);
Figure 13 is that the present invention is without blade fan embodiment 1 stereogram (base is suction tray);
Figure 14 is that the present invention is without blade fan embodiment 1 stereogram (fixed tray of base for horizontally rotating).
The reference character that marks in the above accompanying drawing is respectively:
The 1-air channel, 11-second collar, 12-first collar, 121-shell, the 121a-shell, 122-separates thin slice, 123-the first gusset, 124-the second gusset, the 125-intake grill, 126-outer shroud exhaust outlet, 126a-outer shroud exhaust outlet, ring exhaust outlet in the 127-, ring exhaust outlet in the 127a-, 128b-auxiliary air-outlet, the 2-blower fan, 2a-single impeller blower fan, 21-casing, 211-connects bayonet socket, 212-directing vane, 213-guide cone, the 22-drive motor, 221-rotating shaft, 23-impeller, the 23a-impeller, 231a-impeller intake grill, 232a-blade, 24-casing intake grill, 25-base, 251-pitch regulation groove, 252-circular arc guiding face, 253-rotating shaft, 3-fixing clamp, the 3a-fixing sucking disk, the 3b-level turns to fixed base, the 31-clamp, 32-horizontally rotates the adjusting rotating shaft, and 32b-horizontally rotates the adjusting rotating shaft, and rotating shaft is regulated in 33-pitching rotation.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail, but is to be understood that protection scope of the present invention is not subjected to the restriction of embodiment.
Embodiment 1
The present invention without blade fan embodiment 1 air channel as shown in Figure 1, 2, it is air channel 1, by first collar 12 and second collar 11 axially docking and fastening form, first collar 12, second collar 11 are mutually corresponding annular groove, the inner cavity that forms of two collars after the docking, and integral body is ring after the docking, has exhaust outlet in first collar 12, exhaust outlet arranges around first collar 12 and even interval, and towards side to be dried.
First collar 12 is divided into shell 121 and inner ring (referring to Fig. 1), shell 121 and inner ring have consisted of the annular groove of first collar 12, inner ring has consisted of the surface of the annular groove inside part of first collar 12, and exhaust outlet is around on the circular arc junction surface between the shell 121 that is arranged at first collar 12 and the inner ring side surface.Shell 121 and inner ring are one-body molded by the radially gusset of spaced set, along first collar one circle is set circumferentially and cuts apart thin slice 122, this cut apart thin slice 122 radially gusset be divided into the first gusset 123 and the second gusset 124, form double-deck exhaust outlet, ring exhaust outlet 127 and outer shroud exhaust outlet 126 (referring to Fig. 2) namely, cutting apart thin slice 122 setting of paralleling to the axis, also can be the taper setting that forms certain angle with axis, with the flow direction of the corresponding exit flow of correspondence.The conical surface of the internal surface of first collar, 12 inner rings for enlarging gradually towards exhaust outlet.
Further shown in Fig. 1,2,7,10, the blower fan 2 that embodiment 1 relates to is connected with the intake grill 125 in air channel by the connecting port, and air-flow is pressed into the air channel by blower fan 2 and discharges by exhaust outlet.
Further shown in Fig. 7,10, the casing 21 of blower fan 2 is the Circular Cylindrical Thin Shells body of horizontal cross, drive motor 22 is installed in the casing 21, drive motor 22 two ends have dual output rotating shaft 221 (referring to Figure 10), the axis of rotating shaft 221 is consistent with the axis of the Circular Cylindrical Thin Shells body of casing 21 or in the same way, casing 21 is stretched out and be positioned to rotating shaft 221 from the two ends of motor 22.Impeller 23 is centrifugal structure, whole cylindrical, its ring perimeter surface is established centrifugal blade impeller 23, the quantity of impeller 23 is two, be fastenedly connected with the machine shaft 221 that is positioned at casing respectively, the intake grill of impeller 23 is corresponding with the two ends intake grill 24 that is arranged at cylindrical shell 21, and casing 21 intake grills 24 are long strip through hole (referring to Fig. 7) or the cellular via-hole array of radial arrangement.The air-flow intake grill 125 through air channel 1 under the driving of impeller 23 that enters from intake grill 24 levels of casing 21 enters annular passage 1, and then blows out by outer shroud exhaust outlet 126 and interior ring exhaust outlet 127.In order to feed the air-flow guiding into the air channel, the exhaust outlet of casing 21 is round structure, the outer surface of the exhaust outlet of fan casing 21 be provided with air channel 1 fixing be connected bayonet socket 211, setting-in directing vane 212 in the exhaust outlet of casing 21, the median plane of directing vane 212 to the air channel 1 be provided with the projection guide cone 213, the internal surface of the circular frame of directing vane 212 and the circular exhaust outlet of fan casing 21 is suitable.
Further shown in Fig. 8,9, impeller 23 also can use alternative impeller 23a, and impeller 23a has the intake grill 231a (referring to Fig. 8) of axial protrusion and the arc shaped blade 232a (referring to Fig. 9) of centripetal extension.Certainly, can also adopt other approximate Impeller Design, as long as guarantee air-flow be imported in the air channel.
Of the present invention is portable without blade fan, so its supporting base can be designed to the structure of various ways.As shown in Figure 7, can or inhale on smooth desktop or other smooth surface by mounting base 25 placements without blade fan, base has pitch regulation groove 251 and circular arc guiding face 252, uses the wind axis line and can do the pitching angle adjustment.As shown in figure 12, can also fix at casing 21 rear portions a link arm, blower fan uses fixing clamp 3 fixing, and namely the end at link arm arranges retaining clip 31.As shown in figure 13, also can use sucker base 3a to be fixed, link arm has to horizontally rotate regulates rotating shaft 32 and pitching rotation adjusting rotating shaft 33, and this mounting structure can will be fixed on the vertical smooth flat without blade fan.As shown in figure 14, fan casing 21 with can turn to fixed base 3b and horizontal plane to realize stable putting by level, horizontally rotate and regulate rotating shaft 32b and insert fan casing 21 interior connections, casing 21 can be regulated rotating shaft 32b and realizes that adjusting horizontally rotate angle around horizontally rotating.
Further as shown in figure 11, in the little situation of air quantity demand, also can use the single impeller blower fan, be that single impeller blower fan 2a is connected with air channel 1, for the air channel provides wind regime, blower fan 2a only has single intake grill, is applicable to less the using without blade fan of air quantity requirement, and its balance is not as good as two blower fan structures; Fan casing can be pegged graft by integrated bottom of shell and base 25, realizes connecting and the adjusting pitch angle by rotating shaft 253 simultaneously, can certainly adopt aforesaid other Placement to fix.
Embodiment 2
Embodiment 2 is such as Fig. 3, shown in 4, the first collar 12a that is air channel 1a with embodiment 1 difference be connected collar 11a and be connected, wherein, the stepped conical surface that enlarges is step by step adopted on the surface of the shell 121a annular groove inside part of the first collar 12a, exhaust outlet is interior ring exhaust outlet 127a and the outer shroud exhaust outlet 126a around the one by one interval setting of axis, in, the outer shroud exhaust outlet is arranged at respectively on the transitional surface of the conical surface that the stepped ring of the first collar 12a enlarges step by step, for making air-out more even, in, outer shroud exhaust outlet 127a, close between the corresponding exhaust outlet be crisscross arranged (owing to analyse and observe the restriction of position, only can show interior ring exhaust outlet 127a among Fig. 4) between the 126a.
Embodiment 3
Embodiment 3 is shown in Fig. 5,6, namely increase auxiliary air-outlet on embodiment 1 basis, the conical surface of the annular groove inside part of 1 first collar is provided with auxiliary air-outlet 128b in the air channel, and auxiliary air-outlet 128b is equidistantly around the inboard conical surface setting of first collar.Auxiliary air-outlet is that the inner surface at first collar arranges through hole, and the guide wall of shape shown is set in the port of through hole, so that the wind direction of the wind direction of auxiliary air-outlet and aforementioned conventional exhaust outlet is consistent.
The present invention by annular passage without convex surfaces the exhaust outlet of direct ejection air-flow is set so that no longer be attached at behind the flow shedding exhaust outlet projection the surface, can adapt to neatly the requirement of various different airflow shaped, the flow direction.
More than disclosed only be several specific embodiment of the present invention, still, the present invention is not limited thereto, the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.

Claims (8)

1. one kind without blade fan, it is characterized in that, comprising:
The air channel, it is formed along the axial direction docking by first collar and second collar, and first collar, second collar are mutually corresponding annular groove, forms a cavity after the docking between its two collar, described first collar is provided with exhaust outlet, and exhaust outlet circumferentially evenly arranges along first collar; Exhaust outlet is divided into interior ring exhaust outlet and the outer shroud exhaust outlet of annular; The surface of the annular groove inside part of described first collar is the state that enlarges gradually towards exhaust outlet;
The blower fan of calming the anger, fan casing and described air channel connect, and the air-flow blower fan of being calmed the anger is pressed into described air channel and discharges by described exhaust outlet.
2. according to claim 1 without blade fan, it is characterized in that the surface of the annular groove inside part of described first collar is the conical surface that smooth gradual change enlarges.
3. according to claim 1 without blade fan, it is characterized in that the surface of the annular groove inside part of described first collar is the stepped conical surface that enlarges step by step.
4. according to claim 2 without blade fan, it is characterized in that, on the axial end of described exhaust outlet around the annular groove that is arranged at first collar.
5. according to claim 4 without blade fan, it is characterized in that, separated by the thin slice of cutting apart of annular between interior ring exhaust outlet and the outer shroud exhaust outlet, the described thin slice of cutting apart is connected with described the first collar one by the radially gusset along the circumferential spaced set of thin slice, and the angle of inclination of cutting apart thin slice is set according to default air-out direction.
6. according to claim 5 without blade fan, it is characterized in that the surface of the annular groove inside part of described first collar arranges auxiliary air-outlet along circumferentially even interval.
7. according to claim 3 without blade fan, it is characterized in that described interior ring exhaust outlet and outer shroud exhaust outlet are arranged at respectively on the transitional surface between the described stepped conical surface that enlarges step by step, and respectively even interval arranges between the exhaust outlet of same ring.
8. according to claim 7 without blade fan, it is characterized in that, be crisscross arranged between exhaust outlet corresponding to described inner and outer rings.
CN201210127081.2A 2012-04-26 2012-04-26 A kind of without blade fan Expired - Fee Related CN103375440B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201210127081.2A CN103375440B (en) 2012-04-26 2012-04-26 A kind of without blade fan
PCT/CN2012/076522 WO2013159424A1 (en) 2012-04-26 2012-06-06 Bladeless fan

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201210127081.2A CN103375440B (en) 2012-04-26 2012-04-26 A kind of without blade fan

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CN103375440A true CN103375440A (en) 2013-10-30
CN103375440B CN103375440B (en) 2016-04-13

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105715520A (en) * 2016-04-16 2016-06-29 任文华 Fan
CN106015046A (en) * 2016-06-24 2016-10-12 珠海格力电器股份有限公司 Tower fan structure
CN106246601A (en) * 2016-09-30 2016-12-21 广东美的环境电器制造有限公司 Head and bladeless fan for bladeless fan
CN106246602A (en) * 2016-09-30 2016-12-21 广东美的环境电器制造有限公司 Head and bladeless fan for bladeless fan
CN107477026A (en) * 2017-09-30 2017-12-15 广东美的环境电器制造有限公司 Bladeless fan and head
CN107489653A (en) * 2017-09-30 2017-12-19 广东美的环境电器制造有限公司 Bladeless fan and head
WO2018059041A1 (en) * 2016-09-30 2018-04-05 广东美的环境电器制造有限公司 Head for bladeless fan and bladeless fan
CN110131182A (en) * 2019-06-13 2019-08-16 杭州老板电器股份有限公司 Double axial-flow centrifugal fans are set in one kind
CN111336123A (en) * 2020-04-03 2020-06-26 广东省无叶科技有限公司 Air amplification type blower

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101749289A (en) * 2008-12-11 2010-06-23 戴森技术有限公司 Fan
CN201874899U (en) * 2010-11-29 2011-06-22 任文华 Bladeless fan device
CN202091268U (en) * 2011-04-29 2011-12-28 李德正 Foldable bladeless fan
CN101825101B (en) * 2009-03-04 2012-02-22 戴森技术有限公司 Fan assembly
CN202187935U (en) * 2011-07-12 2012-04-11 蔡炳照 Mounting structure of bladeless electric fan power device
CN202646181U (en) * 2012-04-26 2013-01-02 余姚市华昌电器制造有限公司 Non-blade fan

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101749289A (en) * 2008-12-11 2010-06-23 戴森技术有限公司 Fan
CN101825101B (en) * 2009-03-04 2012-02-22 戴森技术有限公司 Fan assembly
CN201874899U (en) * 2010-11-29 2011-06-22 任文华 Bladeless fan device
CN202091268U (en) * 2011-04-29 2011-12-28 李德正 Foldable bladeless fan
CN202187935U (en) * 2011-07-12 2012-04-11 蔡炳照 Mounting structure of bladeless electric fan power device
CN202646181U (en) * 2012-04-26 2013-01-02 余姚市华昌电器制造有限公司 Non-blade fan

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105715520A (en) * 2016-04-16 2016-06-29 任文华 Fan
CN106015046A (en) * 2016-06-24 2016-10-12 珠海格力电器股份有限公司 Tower fan structure
CN106015046B (en) * 2016-06-24 2019-11-12 珠海格力电器股份有限公司 Tower fan structure
CN106246601A (en) * 2016-09-30 2016-12-21 广东美的环境电器制造有限公司 Head and bladeless fan for bladeless fan
CN106246602A (en) * 2016-09-30 2016-12-21 广东美的环境电器制造有限公司 Head and bladeless fan for bladeless fan
WO2018059041A1 (en) * 2016-09-30 2018-04-05 广东美的环境电器制造有限公司 Head for bladeless fan and bladeless fan
CN106246601B (en) * 2016-09-30 2020-06-26 广东美的环境电器制造有限公司 Machine head for bladeless fan and bladeless fan
CN106246602B (en) * 2016-09-30 2021-09-21 广东美的环境电器制造有限公司 Machine head for bladeless fan and bladeless fan
CN107477026A (en) * 2017-09-30 2017-12-15 广东美的环境电器制造有限公司 Bladeless fan and head
CN107489653A (en) * 2017-09-30 2017-12-19 广东美的环境电器制造有限公司 Bladeless fan and head
CN110131182A (en) * 2019-06-13 2019-08-16 杭州老板电器股份有限公司 Double axial-flow centrifugal fans are set in one kind
CN111336123A (en) * 2020-04-03 2020-06-26 广东省无叶科技有限公司 Air amplification type blower

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