TWM545286U - Blade module and fan using the same - Google Patents

Abstract

A blade module and a fan using the same are provided. The blade module includes a rotating axis and a plurality of blades. Each blade is connected to the rotating axis and includes a blade body and a flow guiding portion. The flow guiding portion is connected to the blade body and has an opening.

Description

Blade module and fan using the same

The present invention relates to a blade module and a fan using the same, and more particularly to a blade module having an airflow guiding portion and a fan applying the same.

The computer contains a central processing unit to handle large amounts of data. During processing of the data, the central processor also emits high heat. For cooling, the computer is almost equipped with a fan. However, the larger the fan's airflow, the better the heat dissipation performance. Therefore, how to increase the air volume of the fan is one of the efforts of the industry.

The present invention relates to a blade module and a fan applied thereto, which can improve the above-mentioned conventional problems.

According to one embodiment of the present invention, a blade module is proposed. The blade module includes a rotating shaft and a plurality of blades. Each blade is coupled to the rotating shaft and includes a blade body and a first airflow guiding portion. The blade body has a first edge and a second edge, and the first edge and the second edge are arranged along an axial direction of the rotating shaft. The first airflow guiding portion is connected to the blade body from a portion of the first edge.

According to another embodiment of the invention, a blade module is proposed. The blade module is made by the following methods: stamping forging and cutting, forming a plurality of blades, wherein each of the blades includes a blade body and a first airflow guiding portion, the blade body having a first edge and a second edge, and the first airflow guiding portion is partially connected to the blade body from the first edge; The cover forming technology is used to connect the blades with a rotating shaft, wherein the first edge and the second edge are arranged along the axial direction of the rotating shaft.

According to another embodiment of the present invention, a fan is proposed. The fan includes a blade module as described above and a casing. The outer casing surrounds a portion of the blade module and is spaced apart from each of the first airflow guiding portions.

In order to better understand the above and other aspects of the present invention, the preferred embodiments are described below, and in conjunction with the drawings, the detailed description is as follows:

100‧‧‧fan

110, 210, 310‧‧‧ blade module

111‧‧‧ shaft

111s‧‧‧Week

112, 212, 312‧‧‧ blades

1121‧‧‧ blade body

1121e1‧‧‧ first edge

1121e2‧‧‧ second edge

1122, 3122‧‧‧First airflow guide

1122a‧‧‧ first opening

1122a1‧‧‧Open edge

1122s, 1123s‧‧‧ windward

1123‧‧‧Second airflow guide

120‧‧‧Shell

121‧‧‧ side

121a‧‧‧air outlet

122‧‧‧ first shell

122a‧‧‧ inlet

123‧‧‧ second shell

2122‧‧‧ Third airflow guide

2122a‧‧‧ second opening

2123‧‧‧fourth airflow guide

3122a‧‧‧First Extension

3122b‧‧‧Second extension

A1‧‧‧ angle

A2‧‧‧ obtuse angle

G1‧‧‧ airflow

S1‧‧‧Rotation direction

SP1‧‧‧Air Push Zone

FIG. 1A is a schematic view of a fan according to an embodiment of the present invention.

Fig. 1B is a view showing the appearance of a blade module of the fan of Fig. 1A.

FIG. 1C is a plan view showing the blade module of FIG. 1B.

Fig. 1D is a side view showing the blade module of Fig. 1B.

Fig. 2 is a cross-sectional view showing the fan of Fig. 1A in the direction 2-2'.

FIG. 3 is a schematic diagram of a blade module according to another embodiment of the present invention.

FIG. 4 is a perspective view of a blade module according to another embodiment of the present invention.

Figure 5 is a graph showing the relationship between the air volume of the fan and the wind pressure.

1A to 1D, FIG. 1A is a schematic view of a fan 100 according to an embodiment of the present invention, and FIG. 1B is an external view of a blade module 110 of the fan 100 of FIG. 1A, and FIG. 1C is a view The blade module 110 of FIG. 1B FIG. 1D is a side view of the blade module 110 of FIG. 1B.

The fan 100 of the present embodiment is a centrifugal fan, and can be applied to a computer or other device that requires heat dissipation, wherein the computer is, for example, a notebook computer or a desktop computer.

As shown in FIGS. 1A to 1D, the fan 100 includes a blade module 110 and a casing 120. The outer casing 120 surrounds a portion of the blade module 110. The outer casing 120 includes a side portion 121, a first shell 122 and a second shell 123, wherein the first shell 122 is located above the blade body 1111, the second shell 123 is located below the blade body 1111, and the side portion 121 is connected to the first shell 122 and The second shell 123. The side portion 121 has an air outlet 121a, and the first housing 122 has an air inlet 122a. When the blade module 110 is in operation, a gas flow G1 enters the outer casing 120 from the human air outlet 122a, and is vented from the air outlet 121a by being pushed by the blade module 110.

As shown in FIG. 1B, the blade module 110 includes a rotating shaft 111 and a plurality of blades 112. The rotating shaft 111 has a circumferential surface 111s, and each of the blades 112 is connected to the circumferential surface 111s of the rotating shaft 111 and radially extends in a direction away from the circumferential surface 111s. The blade 112 may specifically be a metal blade. Furthermore, the metal blade 112 may be a sheet metal piece that is forged and cut through a die, and then formed by another process, such as injection molding, to form a blade module having a plurality of blades 112 and a rotating shaft 111. 110. The material of the rotating shaft 111 may be different from the material of the blade 112. For example, the material of the rotating shaft 111 may include plastic, or the rotating shaft may also contain a metal skeleton and/or a magnet, and the rotating shaft 111 may be used as a hub or a part of a motor. Since the blade 112 of the present embodiment can be independently fabricated, the thickness of the blade 112 is not affected by the other process, and thus can be designed to be thin.

Compared with the plastic blade, the metal blade has a thinner thickness, and the volume of the airflow pushing region SP1 between the two blades 112 can be increased to improve the fan 100. The amount of air. In one embodiment, the thickness of the metal blade 112 may be less than or substantially equal to 0.2 millimeters, which may significantly increase the volume of the airflow pushing zone SP1 to increase the amount of air exiting the fan 100. In one embodiment, the thickness of the metal blade 112 can be as small as 0.1 or 0.05 mm, or even smaller, which is a size that is not achievable with plastic blades or conventional blades. Since the thickness of the metal blade 112 is thin, the number of the blades 112 can be increased, thereby increasing the ability of the blade to push the airflow. In one embodiment, the number of blades 112 can be up to 59 or even more. The more the number of blades, the higher the air volume of the fan 100. Compared to the metal blade 112, the plastic blade is limited by the thicker thickness, and the number of blades and its ability to push the airflow are limited.

Further, the airflow pushing zone SP1 herein refers to a space between the two blade bodies 1121. When the space of the airflow pushing zone SP1 is larger, the more gas flow into the airflow pushing zone SP1, the larger the amount of air that is pushed. In addition, compared with the metal blade 112, the plastic blade is limited to a thicker thickness, and the number of blades is small, resulting in less airflow into the airflow pushing zone and lower the amount of air being pushed.

Each blade 112 includes a blade body 1121 and a first airflow guiding portion 1122. The first airflow guiding portion 1122 is coupled to the blade body 1121 and has a first opening 1122a (the first opening 1122a is illustrated in FIG. 1D). When the blade module 110 is in operation, the airflow G1 can enter the airflow pushing zone SP1 between the two blade bodies 1121 through the first opening 1122a to increase the airflow in the airflow pushing zone SP1, thereby increasing the airflow amount of the fan 100.

As shown in FIG. 1B, each blade body 1121 has a first edge 1121e1 and a second edge 1121e2 arranged along the axial direction of the rotating shaft 111, that is, the first edge 1121e1 and the second edge 1121e2 are respectively corresponding to the blade body 1121. The opposite edges of the axial direction of the rotating shaft 111. Each of the first airflow guiding portions 1122 is opposite A portion or a portion of the first edge 1121e1 of the blade body 1121 extends away from the blade body 1121, for example, simultaneously extending in the axial direction of the rotating shaft 111 and the rotating direction S1 of the rotating shaft 111, so that the radial length of the blade 112 will not be increased. . In other words, the fan 100 of the presently-created embodiment can increase the area of the blade 112 without enlarging the radial dimension of the blade 112.

As shown in FIG. 1B, each of the first airflow guiding portions 1122 has a curved shape. For example, each of the first airflow guiding portions 1122 is recessed in the opposite direction to the rotational direction S1 of the rotating shaft 111 to form a windward surface 1122s. In this way, when the blade module 110 is in operation, the airflow G1 can be guided through the windward surface 1122s of the first airflow guiding portion 1122 to enter the airflow pushing region SP1 between the two blade bodies 1121 through the first opening 1122a to increase the air volume. The amount of air discharged from the fan 100. In an embodiment, the windward surface 1122s of each of the first airflow guiding portions 1122 is a circular arc surface, but may be an inclined plane. The present embodiment does not limit the curvature radius value of the windward surface 1122s, and the curvature radius of any number of the windward surface 1122s may be the same or different.

As shown in Fig. 1B, each blade body 1121 is recessed in the opposite direction to the direction of rotation S1 of the rotating shaft 111. This design is called a forward-swept design. In another embodiment, the blade body 1121 can be recessed toward the direction of rotation S1 of the rotating shaft 111. This design is referred to as a swept design. The first airflow guiding portion 1122 is recessed in the opposite direction of the rotating direction S1 of the rotating shaft 111 to guide the airflow G1 to enter the airflow between the two blade bodies 1121 through the first opening 1122a. The area SP1 is to increase the amount of air blown by the fan 100.

As shown in FIG. 1B, each of the blades 112 further includes a second airflow guiding portion 1123. Each of the second airflow guiding portions 1123 is connected to the opening edge 1122a1 of the corresponding first opening 1122a, for example, an upper edge. In this way, when the blade module 110 is in operation, the airflow G1 can pass through the guidance of the second airflow guiding portion 1123 and pass through the first The opening 1122a enters the airflow pushing region SP1 between the two blade bodies 1121 to increase the amount of air blown by the fan 100. Further, the second airflow guiding portion 1123 also has an effect of blocking the escape of the airflow G1. For example, since the second airflow guiding portion 1123 is connected to the upper edge of the corresponding first opening 1122a, the airflow G1 can be prevented from escaping upward, thereby reducing the airflow loss of the airflow pushing region SP1 between the two blade bodies 1121.

The second airflow guiding portion 1123 has a windward surface 1123s. In an embodiment, the windward surface 1123s of each of the second airflow guiding portions 1123 is a circular arc surface, but may be an inclined plane. The present embodiment does not limit the curvature radius value of the windward surface 1123s of the second airflow guiding portion 1123, and the curvature radius of any number of the windward surfaces 1123s of the second airflow guiding portion 1123 may be the same or different.

Further, each of the second airflow guiding portions 1123 extends from the opening edge 1122a1 toward the airflow pushing region SP1. In this way, when the blade module 110 is in operation, the airflow G1 is concentrated by the windward surface 1123s of the second airflow guiding portion 1123 and concentrated toward the airflow pushing region SP1, thereby increasing the airflow amount of the airflow pushing region SP1.

Further, each of the second airflow guiding portions 1123 is turned outward in the reverse direction of the rotational direction S1 of the rotating shaft 111. Thus, when the blade 112 rotates about the rotation direction S1, the airflow G1 passes through the first opening 1122a in the opposite direction of the rotation direction S1, and is guided by the windward surface 1123s of the second airflow guiding portion 1123 to enter the two-blade body 1121. The airflow between the push zones SP1.

As shown in FIG. 1B, the angle A1 between the connected second airflow guiding portion 1123 and the first airflow guiding portion 1122 may be between 0 and 90 degrees to increase the air intake amount of the airflow pushing region SP1.

Fig. 2 is a cross-sectional view showing the fan 100 of Fig. 1A in the direction 2-2'. Each of the first airflow guiding portions 1122 can be completely exposed from the air inlet 122a, and the first airflow guiding portion 1122 does not protrude upward beyond the upper surface of the first casing 122. in this way, When the blade module 110 is in operation, the first casing 122 or other adjacent device can be prevented from interfering with the first airflow guiding portion 1122. In another embodiment, in a case where the appearance and the spatial configuration of the adjacent device are pre-designed, each of the first airflow guiding portions 1122 may protrude beyond the upper surface of the first casing 122, that is, the first airflow guiding portion 1122 may Pass through the air inlet 122a. In other embodiments, the first shell 122 can cover at least a portion of each of the first airflow guiding portions 1122; in this design, the first shell 122 and the first airflow guiding portions 1122 can be spaced apart by a distance, so that the blade module When the 110 is in operation, the first casing 122 is prevented from interfering with the respective first airflow guiding portions 1122. In addition, the second shell 123 is spaced apart from each of the blade bodies 1121. When the blade module 110 is in operation, the second shell 123 can be prevented from interfering with the blade bodies 1121.

FIG. 3 is a schematic diagram of a blade module 210 according to another embodiment of the present invention. The blade module 210 includes a rotating shaft 111 (not shown) and a plurality of blades 212. Each of the blades 212 includes a blade body 1121, a first airflow guiding portion 1122, a second airflow guiding portion 1123, a third airflow guiding portion 2122, and a fourth airflow guiding portion 2123. The blade body 1121 of each blade 212 has a first edge 1121e1 and a second edge 1121e2 opposite to each other, and each first airflow guiding portion 1122 is connected to the first edge 1121e1 of the corresponding blade body 1121, and the third airflow guiding portion 2122 is connected to the corresponding The second edge 1121e2 of the blade body 1121. The third airflow guiding portion 2122 has a second opening 2122a to produce a technical effect similar to the aforementioned first opening 1122a. In addition, the connection relationship between the fourth airflow guiding portion 2123 and the third airflow guiding portion 2122 is similar to the connection relationship between the second airflow guiding portion 1123 and the first airflow guiding portion 1122, and details are not described herein again.

Please refer to FIG. 4 , which illustrates an external view of a blade module 310 according to another embodiment of the present invention. The blade module 310 includes a rotating shaft 111 and a plurality of blades 312. The rotating shaft 111 has a circumferential surface 111s, and each of the blades 312 is connected to the circumferential surface 111s of the rotating shaft 111. And extending radially away from the circumferential surface 111s.

Each of the blades 312 includes a blade body 1121 and a first airflow guiding portion 3122, wherein the first airflow guiding portion 3122 is coupled to the blade body 1121. Each of the first airflow guiding portions 3122 includes a first extension portion 3122a and a second extension portion 3122b connected thereto, wherein the first extension portion 3122a is coupled to a portion of the first edge 1121e1 of the corresponding blade body 1121, and from the first edge 1121e1 The axial direction of the rotating shaft 111 extends in a direction away from the first edge 1121e1. Each of the second extending portions 3122b further extends from a side of the first extending portion 3122a away from the blade body 1121 to a direction away from the blade body 1121. The second extending portion 3122b simultaneously extends toward the rotating direction S1 of the rotating shaft 111, so that the first extending portion The 3122a and the second extension 3122b form an obtuse angle A2 of less than 180 degrees on the side advancing toward the rotational direction S1. When the blade 312 is rotated about the rotational direction S1, the airflow G1 is pushed by the first airflow guiding portion 3122, and the airflow G1 is pushed by the second extending portion 3122b and the first extending portion 3122a to the airflow pushing region SP1, so that the airflow can smoothly flow from the external environment. The airflow pushing zone SP1 is entered to increase the air volume of the fan 100.

In another possible embodiment of the present invention, the first airflow guiding portion may also be smoothly extended to be connected in a curved shape without a significant boundary or a turning line between the first extending portion and the second extending portion.

In addition, the material and/or size of the blade 312 may be similar to the material and/or size of the blade 112 described above and will not be described herein. The manufacturing method of the blade 312 and the rotating shaft 111 in this embodiment can also be similar to the manner in which the blade 112 and the rotating shaft 111 are formed, and details are not described herein again. In another embodiment, the first airflow guiding portion 3122 may extend downward from the second edge 1121e2, or the two first airflow guiding portions 3122 may extend from the first edge 1121e1 and the second edge 1121e2, respectively.

Please refer to Figure 5, the inventor of this case further tests and records the post-painting Shows the relationship between the air volume of the fan and the wind pressure. As shown, the horizontal axis represents the air flow of the fan, and the heald axis represents the air pressure of the fan. Under the premise that the structural geometry and other conditions are the same, the fan represented by the curve C1 adopts the blade module not having the airflow guiding portion of the foregoing embodiments, and the fan represented by the curve C2 is equipped with the blade as shown in FIG. Module 310. As can be seen from the figure, when the amount of airflow is zero (for example, the air outlet 121a is blocked), the wind pressure is maximum. When the air volume is not equal to 0, the fan air volume (curve C2) equipped with the blade module 310 of FIG. 4 is significantly improved compared to the curve C1, which indicates that the heat dissipation performance is improved. Under the same wind pressure, the larger the fan air output, the better the flow of the wind inside the electronic device, and the better the heat dissipation performance. For example, with a wind pressure of 0.3, the fan air volume of the blade module 310 equipped with the fourth figure is increased by at least 30% (e.g., from point a to point b) compared to curve C1.

In summary, the blade module of one embodiment of the present invention includes a plurality of blades, wherein each blade includes a blade body and a first airflow guiding portion, wherein the first airflow guiding portion is coupled to the first edge of the blade body. Each of the first airflow guiding portions has a first opening through which the airflow can enter an area between the two blade bodies to increase the amount of air blown by the fan. In an embodiment, each of the blades further includes a second airflow guiding portion that is coupled to the opening edge of the first opening to enhance the guiding effect of the airflow, allowing more airflow into the region between the two blade bodies. In another embodiment, each blade may further include a third airflow guiding portion and a fourth airflow guiding portion, wherein the third airflow guiding portion is coupled to the second edge of the blade body to allow more airflow into the two blade body The area between the two, while enhancing the amount of air from the fan. In another embodiment, the first airflow guide includes first and second extensions that are coupled. The first extension is substantially perpendicular to the first edge of the corresponding blade body and the second extension extends in the direction of rotation of the spindle. Thus, when the blade rotates in the rotational direction, the airflow is subjected to the first airflow guiding portion. The push, while increasing the amount of air from the fan. In other embodiments, an obtuse angle is formed between the first extension portion and the second extension portion, such that when the blade rotates in the rotation direction, the airflow is propelled into the airflow pushing region by the second extension portion and the first extension portion, thereby increasing the fan. The amount of air.

In summary, although the present invention has been disclosed above in the preferred embodiments, it is not intended to limit the present invention. Those of ordinary skill in the art to which the present invention pertains can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of this new type is subject to the definition of the scope of the patent application.

110‧‧‧ Blade Module

111‧‧‧ shaft

111s‧‧‧Week

112‧‧‧ blades

1121‧‧‧ blade body

1121e1‧‧‧ first edge

1122‧‧‧First airflow guide

1122a1‧‧‧Open edge

1122s, 1123s‧‧‧ windward

1123‧‧‧Second airflow guide

A1‧‧‧ angle

G1‧‧‧ airflow

S1‧‧‧Rotation direction

SP1‧‧‧Air Push Zone

Claims (13)

A blade module includes: a rotating shaft; and a plurality of blades, each of the blades being coupled to the rotating shaft and comprising: a blade body having a first edge and a second edge, the first edge and the second edge The shaft is aligned in the axial direction; and a first airflow guiding portion is locally connected to the blade body from the first edge. The blade module of claim 1, wherein each of the first airflow guiding portions has a first opening. The blade module of claim 2, wherein each of the blades further comprises: a second airflow guiding portion connected to an opening edge of the first opening. The blade module of claim 1, wherein each of the first airflow guiding portions comprises: a first extending portion, a portion of the first edge is connected to the corresponding blade body, and away from the blade The direction of the body extends; and a second extension portion is coupled to the first extension portion, and the first extension portion and the second extension portion form an obtuse angle on a side advancing toward a rotation direction of the rotation shaft. The blade module of claim 3, wherein an airflow pushing zone is formed between two adjacent blade bodies, and each of the second airflow guiding portions corresponds to The airflow pushes the direction of the zone. The blade module of claim 3, wherein each of the second airflow guiding portions is turned outward in a direction opposite to a rotation direction of the rotating shaft. The blade module of claim 3, wherein an angle between the connected second airflow guiding portion and the first airflow guiding portion is between 0 and 90 degrees. The blade module of claim 1, wherein each of the first airflow guiding portions extends away from the blade body from a portion of the first edge of the corresponding blade body. The blade module according to claim 1, wherein each of the first airflow guiding portions is concave and curved in a direction opposite to a rotation direction of the rotating shaft. The blade module of claim 1, wherein each of the blades further comprises: a third airflow guiding portion coupled to the second edge of the blade body and having a second opening. The blade module of any one of claims 1 to 10, wherein each of the blades is a metal blade and has a thickness substantially equal to or less than 0.1 mm. A blade module includes: a die forging and cutting method, forming a plurality of blades, wherein each blade includes a blade body and a first airflow guiding portion, the blade body having a first edge and a second edge And the first airflow guiding portion is partially connected to the blade body from the first edge; and the cover forming technology is used to connect the blades with a rotating shaft; wherein the first edge and the second edge are along the rotating shaft Arranged in the axial direction. A fan module, comprising: a blade module according to any one of claims 1 to 12; and a casing surrounding a portion of the blade module and spaced apart from each of the first airflow guiding portions.