CN202082170U

CN202082170U - Bladeless fan

Info

Publication number: CN202082170U
Application number: CN2011201486682U
Authority: CN
Inventors: 任文华
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-05-11
Filing date: 2011-05-11
Publication date: 2011-12-21
Anticipated expiration: 2021-05-11

Abstract

A bladeless fan relates to a fan device, and is characterized in that the bladeless fan includes a nozzle and a component used for generating an airflow passing through the nozzle. The nozzle includes an inside channel and an exhaust port, the nozzle extends around an axis to limit an opening, air from the outside of the bladeless fan is sucked by the airflow emitted from the exhaust port and then passes through the opening, the nozzle includes a surface, the exhaust port is arranged on the surface to enable the airflow to be guided, the surface includes an diffusion surface and a guide surface, the diffusion gradually gets away from the axis in the axial direction and has the gradually reduced included angle with the axis, the guide surface is arranged under the diffusion surface, the included angle between the guide surface and the axis is permanent, the permanent included angle is equal to the included angle between the diffusion surface and the axis at the junction part of the diffusion surface and the guide surface. The bladeless fan can effectively avoid turbulence and vortex generation, and remarkably improve the airflow cooling effect.

Description

No blade fan

Technical field

The utility model 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 that is used to produce air stream, the no blade fan of this kind comprises nozzle and the member that is used to produce by the air-flow of described nozzle, described nozzle comprises the relief opening that is used to receive the inner passage of air-flow and is used to launch air-flow, described nozzle extends around an axis, to limit an opening, entrainmented by described opening by air-flow from no blade fan air outside from described relief opening emission, nozzle comprises a surface, described relief opening is set 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 utility model 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 utility model is that a kind of no blade fan will be provided, this kind is used to produce the no blade fan of air stream, it is characterized in that, described no blade fan comprises nozzle and the member that is used to produce by the air-flow of described nozzle, described nozzle comprises the relief opening that is used to receive the inner passage of air-flow and is used to launch air-flow, described nozzle extends around an axis, to limit an opening, entrainmented by described opening by air-flow from no blade fan air outside from described relief opening emission, nozzle comprises a surface, described 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 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 the angle between at this moment 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.

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

The described member that is used to produce by described 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.

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 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 utility model 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, described nozzle comprises the relief opening that is used to receive the inner passage of air-flow and is used to launch air-flow, described nozzle extends around an axis, to limit an opening, entrainmented by described opening by air-flow from no blade fan air outside from described relief opening emission, nozzle comprises a surface, described 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 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 utlity model has following good effect:

No blade fan of the present utility model 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 utility model;

Fig. 2 is the sectional view that no blade fan shown in Figure 1 intercepts along the A-A line;

Embodiment

Fig. 1 is the structural representation from the no blade fan of the present utility model of device forward observation.This no blade fan comprises the nozzle 1 that defines opening 5 and is arranged on the member 2 of pedestal 9 interior generations the passing through air-flow of nozzle 1 that 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 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 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 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 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, 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 being launched and the air-flow that is entrainmented.

Although showed and described and thought preferred embodiment of the present utility model 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 utility model that is limited by appended claims.

Claims

1. no blade fan that is used to produce air stream, it is characterized in that, described no blade fan comprises nozzle (1) and is used to produce member (2) by the air-flow of described nozzle, described nozzle comprises inner passage (3) that is used to receive air-flow and the relief opening (4) that is used to launch air-flow, described nozzle extends around an axis, to limit an opening (5), entrainmented by described opening by air-flow from no blade fan air outside from described relief opening emission, nozzle comprises a surface, described 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 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.

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

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

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