CN102777429A

CN102777429A - Bladeless fan

Info

Publication number: CN102777429A
Application number: CN2011101210535A
Authority: CN
Inventors: 任文华
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-05-11
Filing date: 2011-05-11
Publication date: 2012-11-14

Abstract

The invention provides a bladeless fan and relates to a fan device. The bladeless fan is characterized by comprising a nozzle and a member used for generating air flow passing through the nozzle, wherein the nozzle comprises an internal channel and an exhaust port, wherein the nozzle extends surrounding an axis so as to limit an opening, air outside the bladeless fan is absorbed by air flow emitted from the exhaust port to pass through the opening, the surface comprises a diffusing surface and a guiding surface, the diffusing surface is far away from the axis gradually along the axis direction, and the included angle between the diffusing surface and the axis is narrowed gradually, the guiding surface is positioned below the diffusing surface, the included angle between the guiding surface and the axis keeps constant, and the constant included angle is identical to the included angle of the diffusing angle and the axis at the junction of the diffusing surface and the guiding surface. According to the bladeless fan provided by the invention, the generation of turbulence and vortex can be effectively avoided, and the cooling effect of air flow is improved obviously.

Description

No blade fan

Technical field

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

Background technique

The one Chinese patent application that on March 31st, 2010, publication number was CN 101684828A (application number: 200910175867.X) disclose a kind of no blade fan that is used to produce air stream; The no blade fan of this kind comprises nozzle and is used to produce the member through the air-flow of said nozzle; Said nozzle comprises the inner passage and the relief opening that is used to launch air-flow that is used to receive air-flow, and said nozzle extends around an axis, to limit an opening; Entrainmented through said opening by air-flow from no blade fan air outside from said relief opening emission; Nozzle comprises a surface, and said relief opening is set on this surface air-flow is directed, and this surface comprises diffusing surface and guiding surface; This diffusing surface is taperedly away from said axis, and this guiding surface is also angled with it below said 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.

First aspect of the present invention is that a kind of no blade fan will be provided, and this kind is used to produce the no blade fan of air stream, it is characterized in that; Said no blade fan comprises nozzle and is used to produce the member through the air-flow of said nozzle; Said nozzle comprises the inner passage and the relief opening that is used to launch air-flow that is used to receive air-flow, and said nozzle extends around an axis, to limit an opening; Entrainmented through said opening by air-flow from no blade fan air outside from said relief opening emission; Nozzle comprises a surface, and said relief opening is set on this surface air-flow is directed, and this surface comprises diffusing surface and guiding surface; This diffusing surface along axial direction gradually away from said axis and and said axis between angle diminish gradually; This guiding surface is positioned at the below of said diffusing surface, and the angle between this guiding surface and the said axis immobilizes, and this changeless angle is identical with the angle of said diffusing surface between diffusing surface and guiding surface intersection and said axis.

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

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

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

The said member that is used to produce through said nozzle air current can be set in the pedestal, and said nozzle is set on the pedestal; The said member that is used to produce through said nozzle air current can all be set in the said inner passage, also can partly be set in the said inner passage.

The said member that is used to produce through said nozzle air current generally includes motor and by motor-driven impeller; Motor can be a dc brushless motor, also can be AC motor; Impeller can be horizontal impeller, can be mixed flow impeller, can also be other impeller.

Said 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 said no blade fan and exported of shaking the head.

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

Second aspect of the present invention is that a kind of nozzle will be provided; This kind is used to produce the nozzle of the no blade fan of air stream, it is characterized in that, said nozzle comprises the inner passage and the relief opening that is used to launch air-flow that is used to receive air-flow; Said nozzle extends around an axis; To limit an opening, entrainmented through said opening by air-flow from no blade fan air outside from said relief opening emission, nozzle comprises a surface; Said relief opening is set on this surface air-flow is directed; This surface comprises diffusing surface and guiding surface, this diffusing surface along axial direction gradually away from said axis and and said axis between angle diminish gradually, this guiding surface is positioned at the below of said diffusing surface; Angle between this guiding surface and the said axis immobilizes, and this changeless angle is identical with the angle of said diffusing surface between diffusing surface and guiding surface intersection and said axis.

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

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

Slot-shaped outlet is usually adopted in the outlet of said relief opening, said 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 said 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 to not have the nozzle of 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 avoided generation, significantly improved the cooling effect of air-flow at intersection turbulent flow and whirlpool.

Description of drawings

Fig. 1 is the structural representation of no blade fan of the present invention;

Fig. 2 is a no blade fan shown in Figure 1 sectional view along the intercepting of A-A line;

Embodiment

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

Fig. 2 has further shown the detail of no blade fan.Visible 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 characteristic 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 1 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 1 of present embodiment comprises 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 said 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 basically 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.Because diffusing surface 6 is diffusing surfaces that gradually change, particularly diffusing surface 6 and guiding surface 7 not have the zone of sudden change at intersection, have effectively avoided the generation of turbulent and whirlpool, have 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 is produced is admitted in the inner passage 3 of nozzle 1; And the air communication that inner passage 3 is received is crossed relief opening 4 and is launched, and the air-flow of being launched from relief opening 4 is directed at diffusing surface 6 and guiding surface 7, assembles or concentrates towards the user at last; Entrainmented through 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 being launched and the air-flow that is entrainmented.

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

Claims

1. no blade fan that is used to produce air stream; It is characterized in that said no blade fan comprises nozzle (1) and be used to produce the member (2) through the air-flow of said nozzle that said nozzle comprises inner passage (3) that is used to receive air-flow and the relief opening (4) that is used to launch air-flow; Said nozzle extends around an axis; To limit an opening (5), entrainmented through said opening by air-flow from no blade fan air outside from said relief opening emission, nozzle comprises a surface; Said relief opening is set on this surface air-flow is directed; This surface comprises diffusing surface (6) and guiding surface (7), this diffusing surface along axial direction gradually away from said axis and and said axis between angle diminish gradually, this guiding surface is positioned at the below of said diffusing surface; Angle between this guiding surface and the said axis immobilizes, and this changeless angle is identical with the angle of said diffusing surface between diffusing surface and guiding surface intersection and said axis.

2. the no blade fan that is used to produce air stream as claimed in claim 1; It is characterized in that; Said diffusing surface directly is connected with a surface that constitutes said relief opening, and this diffusing surface is spent between 30 degree 5 at the angle between said exhaust ports and the said axis.

3. the no blade fan that is used to produce air stream as claimed in claim 1 is characterized in that, the angle between said guiding surface and the said axis is 0 degree.

4. the no blade fan that is used to produce air stream as claimed in claim 1 is characterized in that, the distance that said guiding surface extends along axial direction is between 5 millimeters to 60 millimeters.

5. like the described no blade fan that is used to produce air stream of one of claim 1 to 4, it is characterized in that said nozzle extends at least 50 mm distance along axial direction.

6. like the described no blade fan that is used to produce air stream of one of claim 1 to 4, it is characterized in that said guiding surface extends about axis symmetrically.

7. nozzle that is used to produce the no blade fan of air stream; It is characterized in that; Said nozzle comprises inner passage (3) that is used to receive air-flow and the relief opening (4) that is used to launch air-flow, and said nozzle extends around an axis, to limit an opening (5); Entrainmented through said opening by air-flow from no blade fan air outside from said relief opening emission; Nozzle comprises a surface, and said relief opening is set on this surface air-flow is directed, and this surface comprises diffusing surface (6) and guiding surface (7); This diffusing surface along axial direction gradually away from said axis and and said axis between angle diminish gradually; This guiding surface is positioned at the below of said diffusing surface, and the angle between this guiding surface and the said axis immobilizes, and this changeless angle is identical with the angle of said diffusing surface between diffusing surface and guiding surface intersection and said axis.

8. the nozzle that is used to produce air stream as claimed in claim 7 is characterized in that, said diffusing surface directly is connected with a surface that constitutes said relief opening, and this diffusing surface is spent between 30 degree 5 at the angle between said exhaust ports and the said axis.

9. the nozzle that is used to produce air stream as claimed in claim 7 is characterized in that, the angle between said guiding surface and the said axis is 0 degree.

10. the nozzle that is used to produce air stream as claimed in claim 7 is characterized in that, the distance that said guiding surface extends along axial direction is between 5 millimeters to 60 millimeters.