CN201599250U - Mini cooling fan - Google Patents

Abstract

The utility model discloses a mini cooling fan, which comprises a motor, an impeller, and a plurality of blades with the same shapes and sizes evenly distributed on the outer circumference of the impeller. The mini cooling fan is characterized in that chord lengths, from blade roots to blade tips, of the blades are equal; established angles, from the blade roots to the blade tips, of the blades gradually reduce and present a non-linear distribution, the established angles of the blade roots are 66 degrees, and the established angles of the blade tips are 60 degrees; and sweep-forward angles, from the blade roots to the blade tips, of the blades gradually increase and present a non-linear distribution, the sweep-forward angles of the blade roots are zero degree, and the sweep-forward angles of the blade tips are 3.6 degrees. Compared with like fans, the mini cooling fan adopting the technical scheme has the advantages of large air flow, fine stability without vibration, low noise and greatly improved cooling effect.

Description

A kind of miniature radiation fan

Technical field

The utility model relates to a kind of micro fan, and particularly a kind of air quantity is big, good heat dissipation effect, the miniature radiation fan that the degree of balance is good.

Background technique

Advantages such as micro fan is little owing to volume, and is easy for installation have been widely used in electronic equipment, medical equipment, computer, power apparatus, electric welding machine, numerical controlled machinery, and fields such as office appliance automation are as the usefulness of ventilation and heat.

Along with developing rapidly of industry, requirement aspect technological innovation improves gradually, fan blade is the main body of fan, its physical dimension, profile and blade quantity have decisive influence to the performance of fan, the parameter designing of existing fan blade is reasonable inadequately, so or the high air quantity of rotating speed is big, but noise is also bigger; Air quantity is big but smoothness is not enough, and easily vibration always can not be satisfactory.

Summary of the invention

The utility model provides a kind of air quantity big at above-mentioned the deficiencies in the prior art, and the degree of balance is not well vibrated, the miniature radiation fan of good heat dissipation effect, this fan is by the yardstick to blade, and geometrical shape and quantity are carried out appropriate design, the high air quantity of rotating speed is big when making operation, and smoothness does not well vibrate.

The technical solution of the utility model is achieved in that

A kind of miniature radiation fan, comprise motor, impeller, on the impeller outer circumference, be evenly distributed with a plurality of shapes, big or small identical blade, it is characterized in that: described blade equates all that to blade tip chord length everywhere blade angle reduces to be nonlinear Distribution by blade root gradually to blade tip by blade root, and the blade root established angle is 66 °, the blade tip established angle is 60 °, the sweepforward angle of blade is increased gradually to blade tip by blade root and is nonlinear Distribution, and the sweepforward angle of blade root is 0 °, and the sweepforward angle of blade tip is 3.6 °.

As preferably, the number of described blade is 7.

As preferably, the torsional centre in each cross section of blade places the mid point of the string of a musical instrument, and the torsional centre line of each blade all is in the same plane perpendicular to fan shaft, and described torsional centre line is a curve.

As preferably, the blade root of blade, blade tip chord length are 23.2mm.

Adopted the advantage that the utlity model has of technique scheme to be: the similar fan of comparing, air quantity is big, and smoothness does not well vibrate, and noise is also little, thereby makes that also radiating effect improves greatly.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 be Fig. 1 B-B to blade line style enlarged view.

Embodiment

Embodiment of the present utility model is as follows:

Embodiment: a kind of miniature radiation fan of the present utility model, as shown in Figure 1, comprise motor 1, impeller 2, the diameter of described impeller 2 is 56mm, impeller 2 centers connect motor 1, are evenly distributed with 7 plate shapes, big or small identical blade 3 on impeller 2 circumference; Blade is the main body of fan, its physical dimension, and profile and blade quantity have decisive influence to the performance of fan, in order to improve fan efficiency, increase air quantity, improve degree of operating steadily, and blade of the present utility model has following feature:

(1), have higher static pressure liter for making blade, the solidity of unlikely again excessive increase fan, described blade 3 equates all that to blade tip chord length everywhere the blade root of blade 3, blade tip chord length are 23.2mm by blade root; Such shape not only helps alleviating the weight of blade, more helps reducing the heavy burden of impeller, and the aerodynamic efficiency of fan is improved.

(2), the established angle of blade is the string of a musical instrument in each cross section of blade and the angle between the plane of rotation, the cross section of the blade 3 at different radial distances of the present utility model place has different established angles with respect to plane of rotation, be that blade 3 has relatively and reverses, blade 3 established angles reduce to be nonlinear Distribution by blade root gradually to blade tip, the blade root established angle is 66 °, reverses bigger; As shown in Figure 2, blade tip established angle A is 60 °, reverses less relatively; Make blade 3 each cross section under the fan design state, all be in efficacious workaround.

(3), the torsional centre 5 in each cross section of same blade places the mid point of the blade string of a musical instrument 6, the line of each cross section torsional centre is a torsional centre line 4, the torsional centre line 4 of the utility model blade 3 is a curve, the torsional centre line 4 of each blade all is in the same plane perpendicular to fan shaft, and torsional centre line 4 forms sweepforward angle with respect to the axle center and the line between the blade 3 root torsional centres of fan, and the sweepforward angle of blade 3 is increased gradually to blade tip by blade root and is nonlinear Distribution, the sweepforward angle of blade root is 0 °, and the sweepforward angle of blade tip is 3.6 °.

Claims (4)

1. miniature radiation fan, comprise motor (1), impeller (2), on impeller (2) excircle, be evenly distributed with a plurality of shapes, big or small identical blade (3), it is characterized in that: described blade (3) is all equated to blade tip chord length everywhere by blade root, blade (3) established angle reduces to be nonlinear Distribution by blade root gradually to blade tip, the blade root established angle is 66 °, the blade tip established angle is 60 °, the sweepforward angle of blade (3) is increased gradually to blade tip by blade root and is nonlinear Distribution, the sweepforward angle of blade root is 0 °, and the sweepforward angle of blade tip is 3.6 °.

2. a kind of miniature radiation fan according to claim 1 is characterized in that: the number of described blade (3) is 7.

3. a kind of miniature radiation fan according to claim 1, it is characterized in that: the torsional centre (5) in each cross section of blade (3) places the mid point of the string of a musical instrument, the torsional centre line (4) of each blade all is in the same plane perpendicular to fan shaft, and described torsional centre line (4) is a curve.

4. a kind of miniature radiation fan according to claim 1 is characterized in that: blade root, the blade tip chord length of blade (3) are 23.2mm.

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