CN103244470A

CN103244470A - Bladeless fan

Info

Publication number: CN103244470A
Application number: CN2013102127708A
Authority: CN
Inventors: 任文华
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-05-11
Filing date: 2011-05-11
Publication date: 2013-08-14

Abstract

The invention provides a bladeless fan which comprises a nozzle, and a member for generating an air flow passing through the nozzle, wherein the nozzle comprises an inner passage, an exhaust port and a surface; the nozzle extends around an axis for limiting an opening; the exhaust port is formed in the surface for allowing the air flow to be guided; the surface comprises a diffusion surface; the diffusion surface is gradually far away from the axis in an axis direction; and an included angle between the diffusion surface and the axis is reduced gradually. The invention further provides the nozzle used for the bladeless fan.

Description

No blade fan

The application be that May 11, application number in 2011 are 201110121053.5 the applying date, denomination of invention divides an application for the patent application of " no blade fan ".

Technical field

The present invention relates to a kind of fan assembly that produces air stream.

Background technique

The Chinese patent application that on March 31st, 2010, publication number was CN 101684828A (application number: 200910175867.X) disclose a kind of no blade fan for generation of air stream, the no blade fan of this kind comprises nozzle and for generation of the member of the air-flow by described nozzle, described nozzle comprises for the inner passage that receives air-flow with for the relief opening of launching air-flow, described nozzle extends around an axis, to limit an opening, entrainmented by described opening by the air-flow from described relief opening emission from no blade fan air outside, nozzle comprises a surface, described relief opening is arranged on this surface air-flow is directed, this surface comprises diffusing surface and guiding surface, this diffusing surface is taperedly away from described axis, and this guiding surface is also angled with it below described diffusing surface.

Owing to have the angle of cut that causes that air-flow is undergone mutation between the diffusing surface of the no blade fan of this kind and the guiding surface, cause turbulent flow and whirlpool easily, influence the using effect of its air-flow.

Summary of the invention

The present invention aims to provide a kind of improved no blade fan assembly, to overcome above-mentioned defective of the prior art.

A first aspect of the present invention is will provide-kind of no blade fan, this kind is for generation of the no blade fan of air stream, it is characterized in that, described no blade fan comprises nozzle and for generation of the member of the air-flow by described nozzle, described nozzle comprises for the inner passage that receives air-flow with for the relief opening of launching air-flow, described nozzle extends around an axis, to limit an opening, entrainmented by described opening by the air-flow from described relief opening emission from no blade fan air outside, nozzle comprises a surface, described relief opening is arranged on this surface air-flow is directed, this surface comprises diffusing surface and guiding surface, this diffusing surface along axial direction gradually away from described axis and and described axis between angle diminish gradually, this guiding surface is positioned at the below of described diffusing surface, angle between this guiding surface and the described axis immobilizes, and this changeless angle is identical with the angle of described diffusing surface between diffusing surface and guiding surface intersection and described axis.

Described diffusing surface can directly be connected with a surface that constitutes described relief opening, and this diffusing surface, is preferably spent between 18 degree 5 between 5 degree are spent to 30 at the angle between described exhaust ports and the described axis.

Described guiding surface extends symmetrically about axis usually; In a preferred embodiment, described guiding surface roughly is cylindric extension around axis, and at this moment the angle between described guiding surface and the described axis is roughly 0 degree.

The distance that described guiding surface extends along axial direction is usually between 5 millimeters to 50 millimeters; Described nozzle is at least 30 millimeters along the distance that axial direction extends, and is preferably more than 50 millimeters.

Describedly can be arranged in the pedestal for generation of the member by described nozzle air current, described nozzle is arranged on the pedestal; Describedly can all be arranged in the described inner passage for generation of the member by described nozzle air current, also can partly be arranged in the described inner passage.

Describedly generally include motor and by motor-driven impeller for generation of the member by described nozzle air current; Motor can be dc brushless motor, also can be AC motor; Impeller can be horizontal impeller, can be mixed flow impeller, can also be other impeller.

Described no blade fan usually can be by the technology of shaking the head of existing fan or is increased the coverage area of frame with the wind that increases described no blade fan and exported of shaking the head.

Described no blade fan can be desk fan, can be wall fan, can be ceiling fan, can be flooring fan, can also be the fan of other type.

A second aspect of the present invention is will provide-kind of nozzle, this kind is for generation of the nozzle of the no blade fan of air stream, it is characterized in that, described nozzle comprises for the inner passage that receives air-flow with for the relief opening of launching air-flow, described nozzle extends around an axis, to limit an opening, entrainmented by described opening by the air-flow from described relief opening emission from no blade fan air outside, nozzle comprises a surface, described relief opening is arranged on this surface air-flow is directed, this surface comprises diffusing surface and guiding surface, this diffusing surface along axial direction gradually away from described axis and and described axis between angle diminish gradually, this guiding surface is positioned at the below of described diffusing surface, angle between this guiding surface and the described axis immobilizes, and this changeless angle is identical with the angle of described diffusing surface between diffusing surface and guiding surface intersection and described axis.

Described diffusing surface can directly be connected with a surface that constitutes described relief opening, and this diffusing surface is spent between 30 degree 5 at the angle between described exhaust ports and the described axis.

Angle between described guiding surface and the described axis is preferably 0 degree.The distance that described guiding surface extends along axial direction is usually between 5 millimeters to 60 millimeters.

Slot-shaped outlet is usually adopted in the outlet of described relief opening, described relief opening at the width in its outlet port usually between 0.5 millimeter to 10 millimeters, preferably between 1 millimeter to 6 millimeters; The Way out of described relief opening and the angle of axial direction are usually less than 30 degree, preferably less than 20 degree.

The present invention has following good effect: no blade fan of the present invention or be used for the nozzle of no blade fan, owing between diffusing surface and its diffusing surface of guiding surface intersection and guiding surface, do not have the angle of cut, effectively avoid the generation at intersection turbulent flow and whirlpool, significantly improved the cooling effect of air-flow.

Description of drawings

Figure l is the structural representation of no blade fan of the present invention.

Fig. 2 is that the no blade fan shown in the figure l is along the sectional view of A-A line intercepting.

Embodiment

Figure l is the structural representation from the no blade fan of the present invention of device forward observation.This no blade fan comprises the nozzle l that defines opening 5 and is arranged on the member 2 that the air-flow of nozzle 1 is passed through in pedestal 9 interior generations that nozzle l is arranged on the pedestal.And with reference to figure 2, this nozzle l comprises inner passage 3 and relief opening 4.This nozzle l is arranged as roughly and extends orthogonally about the X-axis line.

Fig. 2 has further shown the detail of no blade fan.As can be seen from Fig. 2, the inner shell 10 that is positioned at the front has formed inner passage 3 with the external casing 11 that is positioned at the back, and the outer surface 8 of inner shell 10 has constituted relief opening 4 with the internal surface 12 of external casing 11.

The feature of nozzle 1 is described below.The shape of nozzle 1 is annular.Inner passage 3 also be the annular and be continuous annular pass.In the present embodiment, nozzle l comprises the internal surface 12 of external casing 11 and the outer surface 8 of inner shell 10, thus internal surface 12 and outer surface 8 relief openings 4 that define closer to each other.Relief opening 4 extends around axis X, and relief opening is selected as in 1 millimeter to 5 millimeters scope at the interval in its outlet port, and performance and the characteristics that no blade fan is required are depended in selection at interval.In the present embodiment, outlet is about 2 mm wides, and relief opening 4 is concentric with inner passage 3.

The surface of the nozzle l of present embodiment comprises the diffusing surface 6 that is positioned at relief opening 4 belows and the guiding surface 7 that is positioned at diffusing surface 6 belows.Diffusing surface 6 surface arrangement for along axial direction gradually away from described axis and and axis X between angle diminish gradually; In the present embodiment, at the intersection of diffusing surface 6 with relief opening 4, about 15 degree of the angle between its diffusing surface 6 and the axis X; At diffusing surface 6 and guiding surface 7 intersections, the angle between its diffusing surface 6 and the axis X is about 0 degree.Guiding surface 7 is arranged as and is basically parallel to axis X and presents substantially cylindrical and level and smooth substantially face for the air-flow from relief opening 4 emissions, can be directed flowing to the place ahead reposefully through the air-flow after the diffusion like this.Not have the zone of sudden change because diffusing surface 6 is a diffusing surface that gradually changes, particularly diffusing surface 6 and guiding surface 7 at intersection, effectively avoided the generation of turbulent and whirlpool, improved cooling effect.

In the present embodiment, the surface of nozzle 1 terminates in outside open surperficial 13 places, and this surface 13 is positioned at the below of guiding surface 7 and away from relief opening 4.In the example shown, diffusing surface 6 extensions are about nozzle 1 and extend 2/3rds of total length along the axis X direction, and guiding surface 7 extensions are about nozzle and extend 1/7th of total length.

During work, the air-flow that member 2 produces is admitted in the inner passage 3 of nozzle l, and the air-flow that inner passage 3 receives is launched by relief opening 4, the air-flow that is launched from relief opening 4 is directed at diffusing surface 6 and guiding surface 7, at last towards user's convergence or concentrated, entrainmented by opening 5 by the air-flow of launching from relief opening from no blade fan air outside, constitute the total air flow of output forward from relief opening 4 air-flow of launching and the air-flow that is entrainmented.

Although showed and described and thought preferred embodiments of the invention at present, apparent, those skilled in the art can carry out various changes and improvements, and does not deviate from the scope of the present invention that is limited by appended claims.

Claims

1. no blade fan for generation of air stream, it is characterized in that, described no blade fan comprises nozzle (1) and for generation of the member (2) of the air-flow by described nozzle, described nozzle comprises for the inner passage (3) that receives air-flow with for the relief opening (4) of launching air-flow, described nozzle extends around an axis, to limit an opening (5), entrainmented by described opening by the air-flow from described relief opening emission from no blade fan air outside, described nozzle comprises a surface, described relief opening is arranged on this surface air-flow is directed, this surface comprises diffusing surface (6), this diffusing surface along described axial direction gradually away from described axis and and described axis between angle diminish gradually.

2. the no blade fan for generation of air stream as claimed in claim 1, it is characterized in that, described diffusing surface directly is connected with a surface that constitutes described relief opening, and this diffusing surface is spent between 30 degree 5 at the angle between described exhaust ports and the described axis.

3. as the described no blade fan for generation of air stream of one of claim 1 to 2, it is characterized in that described nozzle extends at least 50 mm distance along axial direction.

4. nozzle for generation of the no blade fan of air stream, it is characterized in that, described nozzle comprises for the inner passage (3) that receives air-flow with for the relief opening (4) of launching air-flow, described nozzle extends around an axis, to limit an opening (5), entrainmented by described opening by the air-flow from described relief opening emission from no blade fan air outside, nozzle comprises a surface, described relief opening is arranged on this surface air-flow is directed, this surface comprises diffusing surface (6), this diffusing surface along described axial direction gradually away from described axis and and described axis between angle diminish gradually.

5. the nozzle for generation of air stream as claimed in claim 4 is characterized in that, described diffusing surface directly is connected with a surface that constitutes described relief opening, and this diffusing surface is spent between 30 degree 5 at the angle between described exhaust ports and the described axis.