CN201588797U - Miniature fan - Google Patents

Abstract

The utility model discloses a miniature fan, which comprises a motor and an impeller. Pluralities of blades with identical shapes and sizes are uniformly distributed on the outer circumstance of the impeller, the diameter of the impeller is 47.7mm, the chord length of each blade is gradually increased from each blade root to each blade tip to be in linear distribution, the chord length of each blade root is 19.5mm, the chord length of each blade tip is 26mm, an installing angle of each blade is gradually reduced from each blade root to each blade tip to be in nonlinear distribution, the installing angle of each blade root is 55 degrees, the installing angle of each blade tip is 32 degrees, and a forward swept angle of each blade is zero degree. By adopting the above technical scheme, the miniature fan is combined with the diameter of the impeller, and parameters such as blade shapes, sizes, quantity, torsion angles and the like are designed reasonably. Compared with a similar fan, the miniature fan is high in rotational speed, low in noise, good in air dynamic performance, large in blast volume, and better in radiating effect under same power.

Description

Micro fan

Technical field

The utility model relates to a kind of micro fan, the miniature radiation fan that particularly a kind of pneumatic property is good, 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, the requirement aspect technological innovation improves gradually, has both required fan efficient to improve, and reduces noise, and requirement can improve rotating speed again, increases air quantity; But mostly existing axial fan is for the design of different purpose of design, has plenty of in order to raise the efficiency, and has plenty of in order to improve rotating speed, what have then is in order to reduce noise, or the like, these fans overwhelming majority only has the advantage of single performance, therefore can not satisfy requirement in many ways simultaneously.

Summary of the invention

The utility model is at above-mentioned the deficiencies in the prior art, provide a kind of in aerodynamic quality, noise level, the degree of balance, the blade rotational speed aspect has the micro fan of comprehensive advantage, and this fan is by the yardstick to blade, geometrical shape and quantity are carried out appropriate design, noise is low when making the fan operation, the rotating speed height, and smoothness well can not vibrate.

The technical solution of the utility model is achieved in that

Micro fan, comprise motor, impeller, be evenly distributed with a plurality of shapes, all identical blade of size on the impeller outer circumference, the diameter of impeller is 47.7mm, and the chord length of described blade is increased gradually to blade tip by blade root and is linear distribution, the blade root chord length is 19.5mm, the blade tip chord length is 26mm, and the established angle of blade reduces to be nonlinear Distribution by blade root gradually to blade tip, and the blade root established angle is 55 °, the blade tip established angle is 32 °, and the sweepforward angle of blade is 0 °.

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 is in the same plane perpendicular to fan shaft, and the torsional centre line of blade is a straight line.

As preferably, the number of described blade is 5.

The utility model that has adopted technique scheme in conjunction with the impeller diameter size to blade shape, size, quantity, parameters such as windup-degree have been made appropriate design, make its similar fan of comparing, under same power, the rotating speed height, noise is low, and good aerodynamic quality, air quantity is big, and radiating effect is better.

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: micro fan of the present utility model as shown in Figure 1, comprises motor 1, impeller 2, the diameter of described impeller 2 is 47.7mm, motor 1 is a micro motor, and impeller 2 centers link to each other with motor 1, is evenly distributed with 5 plate shapes, big or small all identical blade 3 on impeller 2 circumference; Blade 3 is main bodys of fan, its physical dimension, and profile and blade quantity have decisive influence to the performance of fan, in order to improve fan efficiency simultaneously, reduce fan noise, increase air quantity and improve radiating effect, and blade of the present utility model has following feature:

(1), the chord length of blade is increased gradually to blade tip by blade root and is linear distribution, and the blade root chord length is 19.5mm, and the blade tip chord length is 26mm; 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 55 °, reverses bigger; As shown in Figure 2, blade tip established angle A is 32 °, reverse less relatively, thereby make blade 3 each cross section under the fan design state, all be in efficacious workaround.

(3), as shown in Figure 1, the torsional centre 5 in same blade 3 each cross section is as for the mid point of the 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 is a straight line, the torsional centre line 4 of each blade 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 each blade 3 of the utility model is 0 °.

Claims (3)

1. micro fan, comprise motor (1), impeller (2), on impeller (2) excircle, be evenly distributed with a plurality of shapes, big or small all identical blade (3), it is characterized in that: the diameter of impeller (2) is 47.7mm, the chord length of described blade (3) is increased gradually to blade tip by blade root and is linear distribution, the blade root chord length is 19.5mm, the blade tip chord length is 26mm, the established angle of blade (3) reduces to be nonlinear Distribution by blade root gradually to blade tip, the blade root established angle is 55 °, the blade tip established angle is 32 °, and the sweepforward angle of blade (3) is 0 °.

2. micro fan according to claim 1 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, and the torsional centre line (4) of each blade is in the same plane perpendicular to fan shaft, and the torsional centre line of blade (3) is a straight line.

3. micro fan according to claim 1 is characterized in that: the number of described blade (3) is 5.

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