KR101760716B1 - Cooler fan having variable blade - Google Patents

Abstract

According to the embodiment of the present invention, the variable vane among the vanes formed in the radial direction on the hub is variably rotated according to the rotation speed or the number of revolutions, so that the cooling performance can be improved in each of the low revolution number and the high revolution number. To this end, in particular, one embodiment of the present invention comprises a cylindrical hub coupled to a drive shaft of a drive motor; A plurality of wing engaging portions formed radially on an outer circumferential surface of the hub; A plurality of variable vanes disposed at radial ends of the plurality of vane engagement portions, respectively; And an end portion of each of the vane engaging portions and an end portion of each of the corresponding variable vanes are connected to each other and one end is inserted into a pivot hole formed in one of the end portions of the respective vane coupling portions and the corresponding end portion of each variable vane, And a cooling fan having a variable blade having a pivot shaft positioned at a pivot center so that the variable blade can rotate.

Description

[0001] COOLER FAN HAVING VARIABLE BLADE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a cooling fan for an electronic device, and more particularly, to a cooling fan or an impeller having a variable blade.

The cooling fan is composed of a hub and rotating blades arranged radially and connected to the outer circumferential surface of the hub to generate a flow of air, that is, wind, while rotating. An electric motor is provided inside the hub, and the electric motor is fixed to the frame.

The cooling fan is mounted on an electronic device such as a computer and is used for cooling the heat of various built-in heat generating components by forcibly circulating the surrounding air.

The rotary blades provided in the conventional cooling fan have a gradually increasing or constant shape in a radial direction at a portion connected to the hub. In the case of such a conventional cooling fan, when there is a large amount of heat to be cooled, a cooling fan including a large rotary blade is used to generate strong wind or the rotation speed of the rotary blade is increased.

However, since the space for mounting the cooling fan is usually limited, there is a problem in that there is a limit in increasing the length and width of the rotary blades. Further, if the rotation speed is increased, noise is greatly increased, and the amount of electricity consumed is also increased. The high-speed rotation also shortens the life of the cooling fan.

In addition, in the case of the conventional cooling fan, there is a problem that the flow of air is extremely small in the central portion near the hub due to the limitation of the shape of the rotary blade which gradually widens away from the hub.

In order to solve such a problem, in some prior arts, a configuration has been attempted in which a space is secured in a central portion of a rotary vane and then a separate small rotary vane is additionally provided in the space. However, There is a problem in that it is not sufficient.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a variable vane, which is rotatable in a radial direction, And a cooling fan having a variable blade capable of improving cooling performance in each of them.

It is a further object of the present invention to provide an airflow control device for an air conditioner in which the air flow at the center of the hub is activated through a wing coupling part and the variable wing is variably configured to be rotatable, And to provide a cooling fan having a variable blade capable of improving performance.

The above object of the present invention can be achieved by providing a driving apparatus for a vehicle, comprising: a cylindrical hub coupled to a driving shaft of a driving motor; A plurality of wing engaging portions formed radially on an outer circumferential surface of the hub; A plurality of variable vanes disposed at radial ends of the plurality of vane engagement portions, respectively; And an end portion of each of the vane engaging portions and an end portion of each of the corresponding variable vanes are connected to each other and one end is inserted into a pivot hole formed in one of the end portions of the respective vane coupling portions and the corresponding end portion of each variable vane, The present invention can be achieved by providing a cooling fan having a variable blade having a pivot shaft positioned at a pivot center so that the variable blade can rotate.

Each variable blade may be such that an angle formed between the variable blade and the rotation plane is reduced when the hub rotates at a predetermined speed.

A stopper structure may be formed on the end of each blade coupling portion and the end of each variable blade corresponding thereto, or in such a manner that the pivot shaft and the pivot hole can be rotated within a predetermined rotation angle.

In addition, when the stopper structure is formed on the end portion of each blade coupling portion and the end portion of each variable blade corresponding thereto, stopper projections and stopper grooves are formed respectively at the end portions of the blade coupling portions and at the end portions of the respective vanes corresponding thereto, And may be inserted into a stopper groove having a predetermined clearance corresponding to the rotation angle.

On the other hand, when the stopper structure is formed in the pivot shaft and the pivot hole, a stopper projection is formed on the outer peripheral surface at one end of the pivot shaft, a stopper groove is formed in the pivot hole in the width direction, It may be a structure that is seated in the stopper groove having a clearance.

The cooling fan having a variable blade further includes restoration means for generating a restoring force corresponding to the pivoting movement between the end of each blade coupling portion and the corresponding end of each variable blade or between the pivot shaft and the pivot hole Lt; / RTI >

According to an embodiment of the present invention, the variable vane among the vanes formed in the radial direction on the hub is variably rotated in accordance with the rotation speed or the number of revolutions, so that the cooling performance can be improved in each of the low revolution number and the high revolution number have.

Further, the air flow at the center of the hub is activated through the blade coupling portion, and when the rotation speed is equal to or higher than the predetermined speed, the angle formed between the variable blade and the rotation plane by the rotation is reduced and the rotation speed is adaptively reacted.

FIG. 1 is a perspective view of a cooling fan with a variable blade according to an embodiment of the present invention,
FIG. 2 is a perspective view of a cooling fan with a variable blade according to an embodiment of the present invention,
Fig. 3 is a front view of Fig. 2,
FIG. 4 is an exploded perspective view of a cooling fan having a variable blade according to an embodiment of the present invention,
FIG. 5 is an exploded perspective view of a cooling fan having a variable blade according to an embodiment of the present invention,
6 is a bottom view of Fig.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings and accompanying drawings, but the present invention is not limited to or limited by the embodiments.

Various modifications may be made to the embodiments described below. It is to be understood that the embodiments described below are not intended to limit the embodiments, but include all modifications, equivalents, and alternatives to them.

The terms used in the examples are used only to illustrate specific embodiments and are not intended to limit the embodiments. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises" or "having" and the like refer to the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The terminology used herein is a term used for appropriately expressing an embodiment of the present invention, which may vary depending on the user, the intent of the operator, or the practice of the field to which the present invention belongs. Therefore, the definitions of these terms should be based on the contents throughout this specification.

In the following description of the present invention with reference to the accompanying drawings, the same components are denoted by the same reference numerals regardless of the reference numerals, and redundant explanations thereof will be omitted. In the following description of the embodiments, a detailed description of related arts will be omitted if it is determined that the gist of the embodiments may be unnecessarily blurred.

Cooling fan with variable blade

FIG. 2 is a perspective view of a cooling fan having a variable blade according to an embodiment of the present invention, after the variable blade is rotated. FIG. 3 is a perspective view of the cooling fan according to the embodiment of the present invention. 2 is a front view.

One embodiment of a cooling fan 1 having a variable blade according to the present invention is connected to a hub 10 and a plurality of blade coupling portions 20 and a plurality of blade coupling portions 20 as shown in FIGS. As shown in FIGS. 4 to 6, each of the vanes 30 and the variable vanes 30 are connected to each other. The vanes 30, And further comprises an axis (50).

In the cooling fan 1 of the present embodiment, a driving shaft and a driving motor are connected to the hub 10 and a frame is formed outside the hub 10, so that a detailed description thereof will be omitted and only the cooling fan 1 Described above.

1, the cooling fan 1 includes a plurality of vanes 20 formed radially along the outer circumferential surface of the hub 10 at an equal angle, and a plurality of vanes (not shown) 30 are positioned and connected in a radial direction, and the variable blade 30 is formed by a number corresponding to the blade coupling portion 20.

The hub 10 may be in the form of a cylinder, but may also be a prism with a plurality of corners formed therein. The hub 10 is hollowed so that the drive shaft (or shaft) and the drive motor can be received in the bottom surface. The center of the hub 10 is on the same axis as the rotation axis C rotating in the counterclockwise direction and the outer peripheral surface of the hub 10 has a variable blade 30 at the end of the blade coupling portion 20 and the blade coupling portion 20 .

The variable vane 30 is fluidly connected to the vane coupling portion 20, as shown in Figs. That is, the wing coupling portion 20 is fixed to the hub 10, but the variable wing 30 is not fixed to the wing coupling portion 20. When the hub 10 is rotated, the wing coupling portion 20 rotates while maintaining the shape along the hub 10, while the variable wing 30 is configured such that, when the hub 10 rotates at high speed, . Concretely, the angle formed by the vane coupling part 20 with the rotation plane does not change at the time of low-speed rotation or high-speed rotation, but the angle of the variable vane 30 with the rotation plane at the time of low- . As described above, the vane coupling part 20 is configured as a short inner wing shape and the variable vane 30 is formed as an outer wing shape. However, in another example, the vane coupling part 20 is integrally formed with the hub 10 And may be formed in a convex or flat shape.

The angle formed by the tangent of the blade and the plane of rotation may be defined as an angle formed by the tangent of the blade and the plane of rotation, 50 degrees or less, and the angle of the wing engaging portion 20 formed with the selected angle is not changed regardless of the rotation of the hub 10. On the other hand, in the variable blade 30, the angle formed by the angle selected before the rotation with the rotation plane perpendicular to the rotation axis C at the time of high-speed rotation is smaller than the angle between the rotation plane and the rotation plane. This is because the wind pressure (or air resistance) is strengthened at the lower portion (or the rear surface) of the variable vane 30, that is, at the lower portion of the pivot center, during the high-speed rotation to cause the pivot movement about the pivot shaft 50. The smaller the angle formed with the rotation plane is, the better the performance of the variable blade 30 is. Therefore, the variable blade 30 moves adaptively to find the optimum blade angle. On the contrary, when low-speed rotation is performed, the wind pressure (or air resistance) at the lower part weakens and the rotary motion is performed in the opposite direction.

Hereinafter, the configuration of the present embodiment will be described in detail with reference to FIGS. 4 to 6. FIG.

4 and 5 are exploded perspective views of a cooling fan according to an embodiment of the present invention. FIG. 4 is a view of an end of the variable vane 30 at the lower portion, and FIG. 5 is a side view of the vane coupling portion 20 I looked at the end. 6 is a bottom view of Fig.

The variable blade 30 rotates about the pivot shaft 50. [ The turning center should be optimized in consideration of the area of the blades so that the wind pressure under the pivot shaft 50 of the variable vane 30 at the time of high-speed rotation is larger than the wind pressure at the top of the pivot shaft 50. [ One end of the pivot shaft 50 is fixed to one of the vane coupling portion 20 and the variable vane 30 and the other end thereof is freely rotatable. The other end of the pivot shaft 50 is inserted into the pivot hole 40 at the end of the variable vane 30 and the other end of the pivot shaft 50 is inserted into the pivot hole 50 .

It is also preferable that the turning motion of the variable vane 30 is turned within a predetermined turning angle range. Therefore, in the present embodiment, it is possible to pivot the end of each blade coupling portion 20 and the corresponding end of each variable blade 30, or the pivot shaft 50 and the pivot hole 40 within a predetermined rotation angle A stopper structure can be formed.

One example of such a stopper structure is shown in Figs. One example of the stopper structure may be formed at the end of each wing engagement portion 20 and the end of each variable wing 30 corresponding thereto. Stopper protrusions 60 and 62 and stopper grooves 70 and 72 are respectively formed at the ends of the respective vane engaging portions 20 and corresponding end portions of the variable vanes 30. [ The stopper protrusions 60 and 62 are inserted into the stopper grooves 70 and 72 having a clearance with a width corresponding to the rotation angle. Therefore, the pivoting movement is performed within the range of the clearance, and as a result, the variable blade 30 can have a constant pivoting angle.

4 and 5, two stopper projections 60 and 62 are provided at the ends of the variable vane 30 and two stopper grooves 70 and 72 are provided at the wing engagement portions 30 As shown in Fig. However, unlike the present embodiment, the stopper protrusions 60 and 62 and the stopper grooves 70 and 72 may be formed on opposite sides of the stopper protrusions 60 and 62 and the stopper recesses 70 and 72, Only one of them may be formed. Meanwhile, the stopper grooves 70 and 72 should be understood as a concept including a channel type or a similar structure that is opened in both directions considering its function.

A modification of the stopper structure may be formed in the pivot shaft 50 and the pivot hole 40, unlike the above-described example. A stopper projection (not shown) is formed on the outer peripheral surface of one end of the pivot shaft 50 and a stopper groove (not shown) is formed in the pivot hole 40 in the width direction. Therefore, the stopper projection (not shown) can be seated in the stopper groove (not shown) having a predetermined clearance corresponding to the rotation angle and can be rotated within a constant rotation angle range. Variations of the stopper structure may be formed independently and may be formed together with the above-described example.

The cooling fan 1 having the variable vanes is disposed between the end of each vane coupling portion 20 and the corresponding end of each variable vane 30 or between the rotary shaft 50 and the rotary hole 40, (Not shown) for generating a restoring force corresponding to the pivoting motion. That is, a restoring force means may be further added to facilitate the pivoting movement of the variable blade 30 lying in the pivotal motion during the high-speed rotation in the opposite direction when the low-speed rotation is performed.

Such a restoring force means may be a tension spring using a tensile force by a pivoting motion as a restoring force, a torsion spring using a torque by a pivoting motion, or simply a release spring. In addition, the restoring force means may be made of a silicone material or a rubber material, in addition to the spring, between the ends of the respective vane engaging portions 20 and the corresponding end portions of the variable vanes 30 corresponding thereto. Such a restoration means is not limited to the above-described ones because its shape and material are various.

The aforementioned restoring means such as spring, silicone, rubber, etc., can be designed to obtain the experimental data after changing the wind pressure generating the pivoting motion, the degree of deformation of the restoring means due to the pivoting motion, have.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, As will be understood by those skilled in the art. It is therefore to be understood that the embodiments described above are to be considered in all respects only as illustrative and not restrictive. In addition, the scope of the present invention is indicated by the following claims rather than the above detailed description. Also, all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

1: Cooling fan
10: Hub
20:
30: Variable wing
40: Rotating hole
50: Pivot shaft
60, 62: Stopper projection
70, 72: Stopper groove

Claims (6)

In a cooling fan of an electronic appliance,
A cylindrical hub coupled to a drive shaft of the drive motor;
A plurality of wing engaging portions radially arranged on an outer circumferential surface of the hub;
A plurality of variable vanes disposed at radial ends of the plurality of vane engagement portions, respectively; And
And an end portion of each of the vane coupling portions and an end portion of each of the variable vanes corresponding thereto are connected to each other and one end is inserted into a rotation hole formed in one of the end portions of the respective vane coupling portions and the corresponding end portion of each variable vane And a pivot shaft positioned at a pivot center so that each of the variable vanes can pivot,
The variable vanes rotate about the pivot shaft on the basis of the lower wind pressure of each of the variable vanes 30 when the hub rotates at a speed higher than a predetermined speed or lower than the speed, The angle with the plane becomes smaller or larger,
A stopper structure is formed on the radial end of each of the vane coupling parts and the corresponding end of each of the variable vanes so that the rotary motion can be performed within a predetermined rotation angle,
The stopper structure includes:
Wherein stopper projections and stopper grooves are formed at radial ends of the respective vane coupling parts and corresponding end portions of the respective vanes, and the stopper projections are inserted into the stopper grooves having a predetermined clearance corresponding to the rotation angle,
The stopper projection is formed to be parallel to the pivot shaft and inserted into the stopper groove,
Wherein one of the outer surfaces of the stopper protrusion is supported on one surface of the inner surfaces of the stopper groove or the other surface of the stopper grooves is supported on the other surface of the inner surfaces of the stopper groove, Cooling fan with variable blade.
delete delete delete delete The method according to claim 1,
And a restoring means for generating a restoring force corresponding to the pivoting movement, between the radial end of each of the vane coupling portions and the corresponding end of each of the variable vanes.

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