WO2014166355A1 - Ventilateur - Google Patents

Ventilateur Download PDF

Info

Publication number
WO2014166355A1
WO2014166355A1 PCT/CN2014/074749 CN2014074749W WO2014166355A1 WO 2014166355 A1 WO2014166355 A1 WO 2014166355A1 CN 2014074749 W CN2014074749 W CN 2014074749W WO 2014166355 A1 WO2014166355 A1 WO 2014166355A1
Authority
WO
WIPO (PCT)
Prior art keywords
impeller
housing
motor
fan
motor housing
Prior art date
Application number
PCT/CN2014/074749
Other languages
English (en)
Chinese (zh)
Inventor
任文华
Original Assignee
Ren Wenhua
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 Ren Wenhua filed Critical Ren Wenhua
Publication of WO2014166355A1 publication Critical patent/WO2014166355A1/fr

Links

Classifications

    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/663—Sound attenuation
    • F04D29/664—Sound attenuation by means of sound absorbing material
    • 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
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4213—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps suction ports
    • 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

Definitions

  • the invention relates to a fan.
  • the present invention relates to a domestic fan, such as a household fan, for increasing air circulation and air flow in indoor, office and other environments.
  • Conventional domestic fans typically include a motor and a set of blades or impellers that are rotationally moved by the motor.
  • the set of blades is typically located within a cage that allows air to flow through, but prevents the human body from contacting the rotating blades.
  • the fan also has the risk of the human body touching the set of rotating blades.
  • Means for generating an air flow through the nozzle comprising an impeller housing having an air inlet and an air outlet, an impeller located within the impeller housing, and a motor that drives the impeller to rotate to create an air flow through the impeller housing; An internal passage and an exhaust port for receiving airflow from an air outlet of the impeller housing are included, and the airflow is ejected from the nozzle through the exhaust port.
  • a fan generates a large noise when it is operated, and its use is greatly affected; in addition, it is difficult to fix or mount the device in the base.
  • the present invention is directed to providing an improved fan.
  • the fan is characterized in that the fan comprises a nozzle, a device for forming an air flow through the nozzle, and a sound absorbing member, the device comprising an impeller housing having an air inlet and an air outlet, an impeller located in the impeller housing, A motor for driving the impeller to rotate and a motor housing for fixing the motor, wherein the sound absorbing member is located between the impeller and the impeller housing.
  • the sound absorbing member includes an acoustic foam, and the acoustic foam includes a sponge and glass wool.
  • the sound absorbing member includes a sound absorbing layer, wherein the thickness of the sound absorbing layer is preferably between 2 mm and 35 mm.
  • the sound absorbing member may be in a variety of shapes, preferably including a round cake shape and a circular ring shape.
  • the sound absorbing member is located between the impeller and the impeller housing, the sound absorbing member is closer to the impeller, and the noise generated by the impeller and the motor may be reflected multiple times between the impeller and the impeller housing. Propagation, so the fan can effectively absorb or attenuate the noise generated by the impeller and the motor.
  • the sound absorbing member is coupled to an inner side surface of the impeller housing.
  • the impeller includes an air inlet and an air outlet, and the distance between the sound absorbing member and the air inlet of the impeller The distance is between 5mm and 60mm.
  • the impeller housing comprises a plurality of air inlets, more preferably a plurality of air inlets.
  • the shape of the air inlet includes a circle, a rectangle and a strip.
  • the impeller includes a generally conical hub, a plurality of vanes coupled to the hub, a shroud connected to an outer edge of the plurality of vanes, an air inlet and an air outlet, the muffling member being located The air inlet of the impeller is in the correct orientation.
  • the impeller includes a generally conical hub, a plurality of vanes coupled to the hub, and a shroud coupled to the outer edges of the plurality of vanes, the motor housing partially surrounding the shroud.
  • the distance between the motor housing and the shroud is typically between 0.5 mm and 5 mm, preferably between 0.5 mm and 3 mm, more preferably between 0.5 mm and 1 mm.
  • the motor housing and the shroud are kept at a small distance, which is beneficial to improve the efficiency of the impeller. However, the distance is too small, and it is easy for the impeller to collide with the motor casing during the rotating operation.
  • the impeller includes a shroud
  • the motor housing includes an outer ring
  • the outer ring at least partially surrounds the shroud
  • the impeller includes a shroud
  • the motor housing includes a flow guide ring that at least partially surrounds the shroud
  • the apparatus further includes an anti-vibration member, the anti-vibration member being at least partially located between the impeller housing and the motor housing.
  • the anti-vibration member located between the impeller housing and the motor housing can effectively attenuate the vibration generated by the motor and the impeller from the motor housing to the impeller housing; in addition, the impeller housing is softly connected to the motor housing through the anti-vibration member , is beneficial to reduce the aerodynamic noise generated by the impeller.
  • the fan further includes a limiting member for restricting a wide range of movement of the motor housing relative to the impeller housing, and the anti-vibration member is partially located between the limiting member and the motor housing.
  • Limiting the wide range of movement of the motor housing relative to the impeller housing allows the working clearance between the impeller and the impeller housing to be in a small range, which is advantageous for ensuring effective attenuation of vibrations generated by the motor and the impeller. Impeller working efficiency.
  • the motor housing generally includes a first portion and a second portion, and the motor is disposed between the first portion and the second portion and fixed.
  • the first portion is the upper portion and the second portion is the lower portion, and the motor is disposed between the upper portion and the lower portion and fixed.
  • the motor housing includes an outer ring
  • the anti-vibration member is at least partially located between the outer ring and the impeller housing. This effectively attenuates the vibration generated by the motor and the impeller from the outer ring of the motor housing to the impeller housing.
  • the motor housing includes an outer ring and a flow guiding ring connected to the outer ring, and the anti-vibration member is partially located between the air guiding ring and the impeller housing.
  • the flow guide ring is used to direct the flow of airflow.
  • the flow guiding ring is usually located upstream of the outer ring.
  • the guide ring is usually fixedly connected to the outer ring.
  • the flow guiding ring is preferably integral with the outer ring, ie integrated.
  • the anti-vibration member is formed of a material having elasticity, such as a rubber material.
  • the anti-vibration member includes a soft sealing member and a soft non-sealing member.
  • the soft sealing member preferably includes an annular sealing member surrounding the motor housing, such as a rubber sealing ring, which is advantageous for assembly and has stable elasticity and sealing properties using an annular sealing member.
  • the soft, non-sealing member preferably includes a rubber ring having a plurality of grooves.
  • the flexible sealing member is attached to the motor housing.
  • the anti-vibration member is partially located in an axial gap formed by the impeller housing and the motor housing in the direction of the rotation axis of the motor, such that the motor housing can be in the motor relative to the impeller housing.
  • a small range of elastic motion is performed in the direction of the axis of rotation.
  • the anti-vibration member is partially located in a radial gap formed by the impeller housing and the motor housing in a radial direction perpendicular to the direction of the rotation axis of the motor, such that the motor housing can be opposed to The impeller housing performs a small range of elastic movement in a radial direction perpendicular to the rotation axis of the motor.
  • the limiting member comprises a limiting ring and a plurality of limiting posts with perforations integral with the limiting ring.
  • the use of the limiting ring facilitates the formation of a required gap between the limiting member and the impeller housing, facilitating a small range of motion of the partial motor housing in the gap.
  • the motor housing includes an outer ring and a connecting rod integral with the outer ring, and the cable for supplying power is connected to the motor through the outer ring and the connecting rod.
  • the motor housing includes a plurality of connecting rods through which the cable passes.
  • the motor housing includes an outer ring, a flow guiding ring integral with the outer ring, and a connecting rod fixed to the outer ring, and the cable for supplying power is connected to the motor through the outer ring and the connecting rod.
  • the nozzle preferably includes an internal passage and an exhaust port and defines an opening, and air outside the fan is drawn through the opening by the air flow emitted from the exhaust port.
  • the nozzle preferably comprises an annular nozzle, the height of the nozzle preferably being between 200 mm and 600 mm, more preferably between 250 mm and 500 mm.
  • the nozzle preferably includes an inner housing portion and an outer housing portion that define an internal passage and an exhaust port of the nozzle.
  • the outer casing portion preferably constitutes a partially overlapping inner casing portion such that the vent opening is defined between the outer surface of the inner casing portion and the inner surface of the outer casing portion.
  • the fan preferably includes a base and a nozzle disposed on the base.
  • the base preferably includes a housing and means within the housing for forming an air flow through the nozzle.
  • the venting opening is preferably a slit-like venting opening, the width of the venting opening at the outlet being generally between 0.5 mm and 6 mm, preferably between 1 mm and 3 mm.
  • the motor may be an AC motor or a DC brushless motor;
  • the impeller may be a centrifugal impeller or a mixed flow impeller, preferably a mixed flow impeller;
  • the rotational speed of the impeller is usually between 800 rpm and 7000 rpm, preferably The ground is located between 1200 rpm and 7000 rpm.
  • Figure 1 is a front elevational view of a fan of the present invention.
  • Figure 2 is a side view of the fan shown in Figure 1.
  • Fig. 3 is an enlarged cross-sectional view taken along line A-A of Fig. 1 as seen from the direction F of Fig. 1.
  • Figure 4 is an enlarged cross-sectional view of the lower portion of the fan taken along line B-B of Figure 1.
  • Figure 5 is a schematic illustration of the motor housing of Figure 4.
  • Figure 6 is a schematic illustration of the stop member of Figure 4.
  • Figure 7 is a side elevational view of the stop member of Figure 6.
  • Figure 8 illustrates another alternative construction of the lower portion of the fan of Figure 4.
  • Fig. 1 is a schematic view of a fan of the present invention as seen from the front of the apparatus
  • Fig. 2 is a side view of the fan shown in Fig. 1.
  • the fan 100 comprises a base 2 and a nozzle 1 on the base 2;
  • the base 2 comprises a base 7 and a base 10 located below the base 7, the base 7 comprising a housing 8;
  • a base 7 There is an air inlet 9, which is in the form of a plurality of holes formed in the outer casing 8, through which air is drawn into the outer casing 8 of the base 2 through the air inlet 9.
  • the nozzle 1 comprises an annular casing 3, an internal passage 5 defined by the annular casing 3 and an exhaust port 4 and defining an opening 6.
  • the base 2 further includes a user interface for allowing a user to operate the fan 100.
  • the user interface includes a plurality of buttons 12, 13, 14 that are operable by the user.
  • Figure 3 shows the structure inside the nozzle.
  • the annular housing 3 of the nozzle comprises an inner housing portion 15 and an outer housing portion 16, the inner housing portion 15 comprising an expansion surface 43 and a guiding surface 42 for guiding the gas flow, the inner housing portion 15 and the outer casing portion 16 together define an internal passage 5 in which a perforated plate 40 is further provided, the perforated plate 40 having a plurality of perforations 41 which allow airflow therethrough and which attenuate the airflow noise.
  • the exhaust port 4 is located near the rear of the nozzle 1 and is arranged to emit airflow through the opening 6 toward the front of the fan.
  • the vent 4 generally has a portion extending around the opening 6, preferably surrounding the opening 6.
  • the exhaust ports 4 are respectively defined by overlapping portions or opposing portions of the outer surface of the inner casing portion 15 and the inner surface of the outer casing portion 16, which are in the form of slits, the outlet of the exhaust port 4 preferably having a relatively constant Width, width between 0.5mm and 10mm. In this embodiment, the outlet has a width of about 1.2 mm.
  • FIG 4 shows the internal structure of the lower portion of the fan shown in Figure 1.
  • the base 2 includes a base 10 and is located at the base 10
  • the upper base 7, the base 7 comprises a casing 8 in which means for forming an air flow through the nozzle 1 is provided.
  • the apparatus includes an impeller housing 17, an impeller 18 located within the impeller housing 17, a motor 19 for driving the impeller to rotate, a motor housing 20 for securing the motor 19, and an anti-vibration member 28.
  • the impeller 18 includes a generally conical hub 44, a plurality of vanes 45 coupled to the hub 44, a shroud 37 coupled to the outer edges of the plurality of vanes 45, an air outlet 48 and an air inlet 47.
  • the impeller housing 17 includes an inside surface 49, an outside surface 50, a plurality of air inlets 23, and an air outlet 24.
  • the air inlet 23 is in the form of a strip-shaped hole having a strip-shaped hole having a width of 2 mm.
  • a muffling member 46 is disposed on the inner side surface 49 of the impeller casing 17.
  • the sound absorbing member 46 is substantially a circular sponge which is located below the air inlet 47 of the impeller 18 and has a distance of about 25 mm from the air inlet 47 of the impeller 18. Since the noise generated by the impeller and the motor may be reflected or propagated multiple times between the impeller and the impeller casing, and the sound absorbing member 46 is closer to the impeller 18 and faces the air inlet 47 of the impeller 18, the muffling member 46 can Effectively absorbs or attenuates the noise generated by the impeller and motor.
  • the air inlet 23 of the impeller casing 17 is a strip-shaped hole having a small width, and can also attenuate the noise of the airflow.
  • the muffling member 46 can be located at other locations between the impeller 18 and the impeller housing 17, which can also effectively absorb or attenuate the noise generated by the impeller or motor.
  • the motor 19 is housed in the motor housing 20.
  • the motor housing 20 includes an upper portion 21 and a lower portion 22.
  • the shaft 25 of the motor 19 passes through a hole formed in the lower portion 22 of the motor housing 20 to allow the impeller 18 to be coupled to the shaft 25.
  • the upper portion 21 of the motor housing 20 includes an outer ring 26, a flow guide ring 27 coupled to the lower end of the outer ring 26, and four connecting rods 32 integral with the outer ring 26.
  • the motor housing 20 also includes Four perforations 29 through which the airflow flows.
  • the motor housing 20, the impeller housing 17, and the impeller 18 are preferably formed of plastic.
  • the anti-vibration member 28 is coupled to the outer ring 26 of the motor housing 20 and the flow guide ring 27.
  • the vibration-proof member 28 is a circular rubber ring.
  • the anti-vibration member 28 is partially located in the axial direction formed by the guide ring 27 and the impeller casing 17 in the vertical direction, that is, in the direction of the rotating shaft 25 of the motor.
  • the anti-vibration member 28 is also partially located in a radial direction formed by the impeller casing 17 and the outer ring 26 and the guide ring 27 in the horizontal direction, that is, in the radial direction perpendicular to the direction of the motor shaft 25 In the gap, the anti-vibration member 28 is also partially located between the stop member 30 and the outer ring 26 of the motor housing 20.
  • the motor housing 20 can perform a small range of elastic movement in the vertical direction with respect to the impeller housing 17, or a small range of elastic movement in the horizontal direction with respect to the impeller housing 17.
  • the elastic movement of the motor housing 20 causes the motor 19 and the impeller 18 to perform corresponding elastic movements, thereby facilitating the transmission of vibrations generated by the motor 19 and the impeller 18 from the motor housing 20 to the impeller housing 17.
  • the limiting member 30 includes a retaining ring 34 and four limiting posts 36 having perforations 35 integral with the retaining ring 34.
  • the four limit posts 36 are the same length, four wearing
  • the hole 35 serves as a through hole of the screw, and the stopper member 30 is fixed to the impeller casing 17 by four screws.
  • the guide ring 27 partially surrounds the shroud 37, and the inner surface of the guide ring 27 forms a gap with the outer surface of the shroud 37.
  • the gap has a width of about 1 mm. The smaller the width of the gap, the more advantageous it is to improve the overall performance of the device, but too small a gap tends to cause the impeller 18 to collide with the guide ring 27 during rotational operation.
  • the base 10 is used to engage the surface on which the fan 100 is located, the base 7 includes a user interface and control circuitry 31, and the control circuitry 31 is responsive to various operations of the user interface.
  • the base 2 also includes a swing mechanism for swinging the base 7 back and forth relative to the base 10, the operation of which is controlled by the control circuit 31 in response to the user pressing the button 14 of the user interface.
  • the swinging range of the base 7 with respect to the base 10 is preferably between 60 and 120, and the swinging mechanism is set to perform 3 to 6 swing cycles per minute.
  • a main power cord (not shown) for supplying power to the fan extends through a hole formed in the base 10.
  • the motor 19 is a brushless DC motor, and the rotational speed of the motor can be changed by the control circuit 31 in response to the user operating the knob 13.
  • the maximum speed of the motor 19 is preferably in the range of 5000 rpm to 7000 rpm.
  • the impeller housing 17 is fixed to a step 33 extending inwardly from the outer casing 8, the step 33 being integral with the outer casing 8, the step 33 supporting the impeller 18, the impeller casing 17, The weight of the motor 19 and the motor housing 20. It is easy to find that it is convenient and simple to mount or fix the impeller housing 17 on the step 33.
  • the control circuit 31 activates the motor 19 to rotate the impeller 18.
  • the rotation of the impeller 18 causes air to enter the outer casing 8 through the air inlet 9.
  • the user can adjust the rotational speed of the motor 19 by operating the knob 13, thereby adjusting the speed at which air enters from the air inlet 9.
  • the motor 19 drives the impeller 18 to rotate to generate vibration, which is transmitted to the motor housing 20. Since the vibration-proof member 28 is disposed between the motor housing 20 and the impeller housing 17, and the vibration-proof member 28 is formed of an elastically deformable rubber material, the motor housing 20 can perform a small-range shaft with respect to the impeller housing 17. The movement to the radial direction makes it possible to effectively suppress the transmission of the vibration to the impeller casing 17 and the casing 8 and the nozzle 1 connected to the impeller casing 17.
  • the airflow entering the outer casing 8 is drawn into the impeller casing 17 through the plurality of air inlets 23 of the impeller casing 17, and then enters from the air inlet 47 of the impeller 18, and flows out from the air outlet 48 of the impeller 18. . Since the muffling member 46 is provided on the inner side surface 49 of the impeller casing 17, the muffling member 46 can effectively absorb or attenuate the noise generated by the impeller 18 and the motor 19.
  • the air flow formed by the impeller 18 is guided by the deflector 27 of the motor housing 20, passes through the perforations 29 of the motor housing 20, and then enters the nozzle 1.
  • the air flow travels in two in the internal passage 5 of the nozzle 1.
  • the air flow traveling in the internal passage 5 is emitted by the exhaust port 4.
  • the airflow emitted from the exhaust port 4 passes through the opening 6, while a part of the air around the nozzle 1 is sucked through the opening 6 by the airflow emitted from the exhaust port 4, so that the airflow emitted from the exhaust port 4 is sucked
  • the combination of the air flows constitutes the total airflow that is emitted forward from the nozzle 1.
  • Figure 8 illustrates another alternative construction of the lower portion of the fan of Figure 4.
  • this embodiment is similar to the embodiment shown in Fig. 4 except that the impeller housing 17 is connected to the outer casing 8 in a different manner.
  • the impeller casing 17 is integrated with the outer casing 8 in one body.
  • the impeller housing 17 is fixed to the step 33 of the outer casing 8 by screws.
  • the shape and size of the impeller housing 17 may vary; the number and shape of the air inlets 23 of the impeller housing may vary.
  • the impeller housing 17 may be constructed of a plurality of housing portions; the shape and size of the sound absorbing member 46 may vary.
  • other sound absorbing members may be provided on the outer side surface of the impeller casing 17.

Landscapes

  • 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

L'invention concerne un ventilateur (100) comprenant une buse (1), un dispositif de formation d'un flux d'air passant à travers la buse, un composant silencieux (46), un composant antivibration (28), et un composant limiteur (30). Le dispositif comprend une coque de turbine (17), une turbine (18), un moteur (19), et une coque de moteur (20). La turbine comprend un moyeu (44), plusieurs pales (45), un bouclier (37), une entrée d'air (47), et une sortie d'air (48). La coque de turbine comprend plusieurs entrées d'air (23). Le composant silencieux est situé entre la turbine et la coque de turbine.
PCT/CN2014/074749 2013-04-08 2014-04-03 Ventilateur WO2014166355A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201310119259.3 2013-04-08
CN201310119259.3A CN104100497B (zh) 2013-04-08 2013-04-08 风扇

Publications (1)

Publication Number Publication Date
WO2014166355A1 true WO2014166355A1 (fr) 2014-10-16

Family

ID=51668952

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2014/074749 WO2014166355A1 (fr) 2013-04-08 2014-04-03 Ventilateur

Country Status (2)

Country Link
CN (1) CN104100497B (fr)
WO (1) WO2014166355A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106640764B (zh) * 2016-11-15 2019-05-31 美的集团股份有限公司 壳体、基座及无叶风扇
CN108547798A (zh) * 2018-04-30 2018-09-18 许彐琼 风扇

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2468320A (en) * 2009-03-04 2010-09-08 Dyson Technology Ltd Tilting Fan
GB2468331A (en) * 2009-03-04 2010-09-08 Dyson Technology Ltd Fan assembly
CN202545201U (zh) * 2012-03-19 2012-11-21 任文华 风扇以及用于风扇的气流产生装置
CN102996476A (zh) * 2012-11-14 2013-03-27 胡晓存 无叶风扇
CN203130447U (zh) * 2013-04-08 2013-08-14 任文华 风扇

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2452490A (en) * 2007-09-04 2009-03-11 Dyson Technology Ltd Bladeless fan
DK2265825T3 (da) * 2009-03-04 2011-09-19 Dyson Technology Ltd Ventilatorenhed
CN102900656A (zh) * 2010-12-17 2013-01-30 任文华 无叶风扇装置
CN202789772U (zh) * 2012-08-27 2013-03-13 任文华 风扇
CN102937080A (zh) * 2012-11-19 2013-02-20 任文华 无叶风扇

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2468320A (en) * 2009-03-04 2010-09-08 Dyson Technology Ltd Tilting Fan
GB2468331A (en) * 2009-03-04 2010-09-08 Dyson Technology Ltd Fan assembly
CN202545201U (zh) * 2012-03-19 2012-11-21 任文华 风扇以及用于风扇的气流产生装置
CN102996476A (zh) * 2012-11-14 2013-03-27 胡晓存 无叶风扇
CN203130447U (zh) * 2013-04-08 2013-08-14 任文华 风扇

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Publication number Publication date
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CN104100497A (zh) 2014-10-15

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