阅读说明：本技术 风扇 (Fan with cooling device ) 是由 张楯成 杨朝富 陈建宏 黄建智 于 2018-06-25 设计创作，主要内容包括：本发明公开一种风扇,包括扇框、叶轮以及马达。叶轮包括轮毂、多个扇叶及多个导流片。轮毂的截面积自轮毂的顶部往轮毂的底部方向渐增而呈锥状,轮毂具有至少一通风开口；多个扇叶环设于轮毂的外周缘；多个导流片环设于轮毂的内周缘。马达设置于扇框内,连接并驱动叶轮转动。马达包括定子结构及转子结构。转子结构包括转轴、导磁壳及磁性组件,转轴的一端连接于导磁壳,磁性组件环设于导磁壳的内周缘并与定子结构对应设置；导磁壳的顶面具有至少一开口。(The invention discloses a fan which comprises a fan frame, an impeller and a motor. The impeller comprises a hub, a plurality of fan blades and a plurality of guide vanes. The sectional area of the hub is gradually increased from the top of the hub to the bottom of the hub and is in a cone shape, and the hub is provided with at least one ventilation opening; the fan blades are annularly arranged on the outer periphery of the hub; the plurality of guide vanes are annularly arranged on the inner periphery of the hub. The motor is arranged in the fan frame and connected with and drives the impeller to rotate. The motor includes a stator structure and a rotor structure. The rotor structure comprises a rotating shaft, a magnetic conduction shell and a magnetic assembly, wherein one end of the rotating shaft is connected to the magnetic conduction shell, and the magnetic assembly is arranged on the inner periphery of the magnetic conduction shell in a surrounding mode and corresponds to the stator structure; the top surface of the magnetic conduction shell is provided with at least one opening.)

1. A fan, comprising:

a fan frame;

an impeller, comprising:

a hub, the cross-sectional area of which is gradually increased from the top of the hub to the bottom of the hub and is in a cone shape, and the hub is provided with at least one ventilation opening;

a plurality of fan blades annularly arranged on the outer periphery of the hub; and

the guide vanes are annularly arranged on the inner periphery of the hub; and;

a motor, set up in this fan frame, this motor connection and this impeller of drive rotate, this motor includes:

a stator structure; and

a rotor structure, including a pivot, one lead magnetic shell and a magnetic component, the one end of this pivot is connected in this leads magnetic shell, and this magnetic component encircles the internal periphery that locates this magnetic shell and corresponds the setting with this stator structure, and the top surface of this magnetic shell has an at least opening.

2. The fan of claim 1, wherein the at least one ventilation opening is disposed at a top portion of the hub.

3. The fan as claimed in claim 1, wherein the at least one ventilation opening is disposed between a front edge of the fan blade contacting the outer periphery of the hub and the top of the hub.

4. The fan of any one of claims 1 to 3, wherein the at least one ventilation opening has a size greater than or equal to 3 mm, or an equivalent shape area of the entire ventilation opening is greater than or equal to 7 mm.

5. The fan of claim 1, wherein the fan frame comprises a base, and a distance between a top of the base and a bottom of the hub is greater than or equal to 1.0 mm.

6. The fan as claimed in claim 1, wherein each of the guide vanes extends along an inner circumferential edge of the hub in a direction toward an axial center of the hub.

7. The fan of claim 1 wherein the ratio of the height of each of the baffles to the height of the hub from the top to the bottom of the hub is between 0.3 and 1.2.

8. The fan as claimed in claim 1, wherein a ratio of a length of each of the guide vanes to a diameter of the magnetically permeable casing is between 0.1 and 0.9.

9. The fan of claim 8, wherein each of the guide vanes has a length greater than or equal to 10 mm and a distance from the axis of the hub greater than or equal to 4 mm.

10. The fan of claim 1, wherein the thickness of each baffle is greater than or equal to 1.0 mm.

11. The fan as claimed in claim 1, wherein each of the guide vanes has a rib or wing structure.

12. The fan as claimed in claim 1, wherein the guide vanes are disposed at equal angular intervals.

13. The fan of claim 1, wherein the guide vanes are arranged at unequal angular intervals.

14. The fan of any one of claims 6 to 13 wherein the length, thickness, height or shape of the guide vanes are the same as each other.

15. The fan of any of claims 6 to 13, wherein the guide vanes are different from each other in at least one of length, thickness, height, or shape.

16. The fan as claimed in claim 1, wherein the fan frame is formed with a guide curved surface at an inner circumference of an air inlet side of the fan.

Technical Field

The present invention relates to a fan, and more particularly, to an oblique flow fan capable of improving heat dissipation efficiency inside the fan.

Background

As the performance of electronic devices is continuously improved, the existing electronic devices generate a large amount of waste heat during operation, and if the heat cannot be taken away from the electronic devices in real time, the temperature of the electronic devices is increased, internal components are damaged, and the efficacy and the service life of the electronic devices are reduced. While fans are widely used as heat dissipation devices for electronic devices, those skilled in the art have developed fans with blades and hubs having two or more unequal diameters (also called diagonal flow fans). However, although the conventional diagonal flow fan is convenient for heat dissipation of an electronic device, due to the geometric shape of the fan, the selection of the motor is limited by the height of the material, and when the fan is applied to heat dissipation with high power, the silicon steel sheet is selected, so that waste heat is more easily generated and accumulated inside the fan, thereby easily causing overheating inside the fan, causing the circuit board to be burned or greatly reducing the operating efficiency of the fan, and further affecting the heat dissipation efficiency and the service life of the fan.

Therefore, how to provide an oblique flow fan capable of improving the self-heat dissipation efficiency to avoid the internal overheating of the fan, further prolong the service life of the fan and maintain the operation efficiency of the fan will bring a great breakthrough to the technology in this field.

Disclosure of Invention

The invention aims to provide a fan. Compared with the prior art, the fan can improve the self-heat dissipation efficiency, thereby prolonging the service life of the fan and maintaining the operating efficiency of the fan.

Therefore, the present invention provides a fan, which comprises a fan frame, an impeller and a motor. The impeller comprises a hub, a plurality of fan blades and a plurality of guide vanes. The sectional area of the hub is gradually increased from the top of the hub to the bottom of the hub and is in a cone shape, and the hub is provided with at least one ventilation opening; the fan blades are annularly arranged on the outer periphery of the hub; the plurality of guide vanes are annularly arranged on the inner periphery of the hub. The motor is arranged in the fan frame and connected with and drives the impeller to rotate. The motor includes a stator structure and a rotor structure. The rotor structure includes pivot, magnetic conduction shell and magnetic component, and the one end of pivot is connected in leading the magnetism shell, and the magnetic component ring is located the internal periphery of leading the magnetism shell and corresponds the setting with stator structure, and the top surface of leading the magnetism shell has an at least opening.

In one embodiment, the at least one ventilation opening is disposed at the top of the hub.

In one embodiment, at least one ventilation opening is disposed between the front edge of the fan blade contacting the outer periphery of the hub and the top of the hub.

In one embodiment, the size of at least one vent opening is greater than or equal to 3 mm, or the equivalent shape area of the entire vent opening is greater than or equal to 7 mm.

In one embodiment, the fan frame includes a base, and the distance between the top of the base and the bottom of the hub is greater than or equal to 1.0 mm.

In one embodiment, each of the guide vanes extends along the inner circumferential edge of the hub in a direction toward the axial center of the hub.

In an embodiment, the ratio of the height of each guide vane to the height of the top of the hub to the bottom of the hub is between 0.3 and 1.2.

In one embodiment, the ratio of the length of each flow deflector to the diameter of the magnetically permeable shell is between 0.1 and 0.9.

In one embodiment, the length of each guide vane is greater than or equal to 10 mm and is greater than or equal to 4 mm from the axis of the hub.

In one embodiment, the thickness of each guide vane is greater than or equal to 1.0 mm.

In an embodiment, each guide vane has a ribbed or aerofoil structure.

In one embodiment, the guide vanes are arranged at equal angular intervals.

In one embodiment, the guide vanes are arranged at unequal angular intervals.

In one embodiment, the length, thickness, height or shape of the baffles are the same as each other.

In an embodiment, the guide vanes differ from each other in at least one of length, thickness, height or shape.

In one embodiment, the fan frame is formed with a flow guiding curved surface on the inner periphery of an air inlet side of the fan.

In summary, the fan of the present invention has the following effects: through setting up in at least one ventilation opening of wheel hub, encircle a plurality of water conservancy diversion pieces of locating the internal periphery of wheel hub and lead at least one opening that the top surface of magnetism shell set up, improve the inside radiating efficiency of autologous of fan. Compared with the existing fan, the fan can improve the self-heat dissipation efficiency, thereby prolonging the service life of the fan and maintaining the operating efficiency of the fan.

Drawings

Fig. 1 is a perspective view of a fan according to a preferred embodiment of the present invention.

Fig. 2 is a perspective sectional view of the fan shown in fig. 1.

Fig. 3 is a schematic plan view of the fan shown in fig. 2.

Fig. 4 is a schematic view of an impeller of the fan shown in fig. 2.

FIG. 5A is a schematic view of an impeller of a fan according to a preferred embodiment of the present invention.

FIG. 5B is another schematic view of an impeller of a fan according to a preferred embodiment of the present invention.

FIG. 5C is another schematic view of an impeller of a fan according to a preferred embodiment of the present invention.

FIG. 5D is another schematic view of an impeller of a fan according to a preferred embodiment of the present invention.

FIG. 6 is a temperature distribution diagram of a fan according to various embodiments of the present invention.

Detailed Description

Preferred embodiments of a fan according to the present invention will be described below with reference to the accompanying drawings, in which like elements are described with like reference numerals.

The fan of the invention can improve the self-heat dissipation efficiency, thereby prolonging the service life of the fan and maintaining the operating efficiency of the fan. The structure and features of the fan of the present invention will be described with reference to the following embodiments.

Fig. 1 to 4 are schematic views of a fan 1 according to a preferred embodiment of the invention. The fan 1 includes a fan frame 11, an impeller 12, and a motor 13, wherein the fan frame 11 is formed with a guiding curved surface 11a at an inner periphery of an air inlet side F of the fan 1, thereby increasing an air inlet area and guiding an air flow. The fan 1 of the present invention is exemplified by a diagonal flow fan, but the present invention is not limited thereto.

Referring to fig. 2 to 4, the impeller 12 includes a hub 121, a plurality of blades 122, and a plurality of baffles 123. The cross-sectional area of the hub 121 increases gradually from the top 1211 of the hub 121 to the bottom 1212 of the hub 121, and the hub 121 has at least one ventilation opening 1213, where the ventilation opening 1213 is a through opening for the airflow to pass through; a plurality of fan blades 122 are annularly arranged on the outer periphery of the hub 121; a plurality of baffles 123 are circumferentially disposed around the inner periphery of the hub 121. Specifically, as shown in fig. 2-4, although hub 121 is shown with an extension 1214 protruding from its bottom 1212, extension 1214 of hub 121 may be aligned with bottom 1212 of hub 121 (not shown), and the invention is not limited thereto.

Referring to fig. 2 and 3, the motor 13 is disposed in the fan frame 11 and is connected to and drives the impeller 12 to rotate. The motor 13 includes a stator structure 131 and a rotor structure 132. The rotor structure 132 includes a rotating shaft 1321, a magnetic conduction shell 1322 and a magnetic component 1323, one end of the rotating shaft 1321 is connected to the magnetic conduction shell 1322, and the magnetic component 1323 is annularly arranged on the inner periphery of the magnetic conduction shell 1322 and corresponds to the stator structure 131; the top surface of the magnetic shell 1322 has at least one opening 13221, and the opening 13221 is a through opening for passing the air flow. Specifically, the rotating shaft 1321 can be connected to the magnetic guiding casing 1322 through an end or a region near the end (i.e. the end protrudes from the magnetic guiding casing 1322, not shown), and the present invention is not limited thereto. In addition, the number and shape of the openings 13221 can be adjusted according to the actual needs of the user, and the invention is not limited thereto. Therefore, when the motor 13 drives the impeller 12 to rotate, waste heat is generated in the operation process and accumulated in the motor 13, and the air flow can be brought into the motor 13 through the opening 13221 arranged on the top surface of the magnetic conduction shell 1322 to enhance the dissipation of the waste heat, thereby achieving the effect of improving the self-heat dissipation efficiency. In particular, the stator structure 131 of the motor may be made of silicon steel sheet, coil or other materials, and the invention is not limited thereto. In addition, although fig. 2 and 3 illustrate the bottom of the magnetic conductive casing 1322 protruding out of the bottom 1212 of the hub 121, the bottom of the magnetic conductive casing 1322 may also be disposed in alignment with the bottom 1212 of the hub 121 (not shown), and the invention is not limited thereto.

Referring to fig. 2 and 3, the fan 1 may further include a circuit board 14 electrically connected to the stator structure 131 for driving the stator 131.

In the present embodiment, it is exemplified that the hub 121 includes one ventilation opening 1213, and the ventilation opening 1213 is disposed at the top 1211 of the hub 121 such that the ventilation opening 1213 faces the wind inlet side F of the fan 1. Through the structural design that ventilation opening 1213 is the through-hole for the air current accessible ventilation opening 1213 gets into inside wheel hub 121, and the structural design through guide vane 123 is in order to increase the inside air current flow of wheel hub 121 simultaneously, and then improves autologous radiating efficiency. In particular, the number and shape of the vent openings 1213 may be adjusted according to the actual needs of the user, and the present invention is not limited thereto.

In another embodiment, at least one ventilation opening 1213 is disposed between the front edge 121a of the fan blade 122 contacting the outer periphery of the hub 121 and the top 1211 of the hub 121. For example, referring to fig. 4, the ventilation opening 1213 may be disposed at any position within the straight line b, which is between the front edge 121a of the fan blade 122 contacting the outer periphery of the hub 121 and the top 1211 of the hub 121. Therefore, the position before the front edge 121a of the fan blade 122 facilitates the airflow entering the hub 121, and the situation that the airflow is guided to the air outlet along the direction of the fan blade 122 and cannot enter the hub 121 after contacting the fan blade 122 when the ventilation opening 1213 is disposed at another position is avoided.

Referring to fig. 2 and 3 again, in the present embodiment, the fan frame 11 may include a base 111, and a distance d (a straight line d shown in fig. 3) between a top 1111 of the base 111 and a bottom 1212 of the hub 121 is greater than or equal to 1.0 mm. Thus, the distance d can prevent the impeller 12 from colliding with the base 111 during operation to generate noise. In addition, the distance d can also enhance the exchange between the air flow inside the impeller 12 and the air flow outside the impeller 12, and simultaneously dissipate the waste heat generated by the motor 13 to the outside, so as to further improve the self-heat dissipation efficiency of the fan 1. As shown in fig. 2 and 3, the other end of the rotating shaft 1321 may be connected to the base 111.

Please refer to fig. 4 and fig. 5A to 5D, which are schematic views of an impeller 12 according to a preferred embodiment of the present invention. The dimension r1 of the ventilation opening 1213 of the impeller 12 is greater than or equal to 3 mm, or the equivalent shape area of the entire ventilation opening 1213 (i.e. the sum of the areas of all the ventilation openings 1213) is greater than or equal to 7 mm. The vent opening 1213 is a through opening for the airflow to pass through. As shown in fig. 4 and fig. 5A to 5D, for example, the impeller 12 has a ventilation opening 1213, and the ventilation opening 1213 is a circular hole disposed on the top 1211 of the hub 121, the size r1 is greater than or equal to 3 mm (i.e. the diameter r1 of the circular hole is greater than or equal to 3 mm), or the equivalent shape area of the whole ventilation opening 1213 is greater than or equal to 7 mm (i.e. the sum of the areas of all the circular holes is greater than or equal to 7 mm). In particular, the number and shape of the ventilation openings 1213 can be adjusted according to the actual needs of the user, and the ventilation openings 1213 can also be disposed between the front edge 121a of the fan blade 122 contacting the outer periphery of the hub 121 and the top 1211 of the hub 121 (as shown in fig. 4), which is not limited by the invention. For example, if the vent opening 1213 is a rectangular opening, the dimension r1 is greater than or equal to 3 mm (i.e., the length r1 of the vent opening 1213 is greater than or equal to 3 mm), or the equivalent shape area of the entire vent opening 1213 is greater than or equal to 7 mm (i.e., the sum of the areas of all vent openings 1213 is greater than or equal to 7 mm); if the vent openings 1213 are irregular, the dimension r1 is greater than or equal to 3 mm (i.e., the average length r1 of the vent openings 1213 is greater than or equal to 3 mm), or the equivalent shape area of the overall vent openings 1213 is greater than or equal to 7 square mm (i.e., the sum of the areas of all vent openings 1213 is greater than or equal to 7 square mm).

Referring to fig. 4, the ratio of the height H of the baffle 123 to the height H from the top 1211 to the bottom 1212 of the hub 121 is between 0.3 and 1.2. Specifically, although fig. 4 shows that the baffle 123 extends along the direction D1 from the top 1211 to the bottom 1212 of the hub 121, the extending direction of the baffle 123 may be adjusted according to the actual requirement of the user (for example, the baffle may extend along a horizontal line having an included angle with the extending direction D1 from the top 1211 to the bottom 1212 of the hub 121), and the invention is not limited thereto.

Please refer to fig. 4 and fig. 5A to 5D for describing the specific arrangement of the flow guiding plate 123. Each of the guide vanes 123 extends in a direction D2 from the inner circumferential edge of the hub 121 toward the axial center c of the hub 121 (i.e., perpendicular to the inner circumferential edge of the hub 121). Specifically, although fig. 4 and 5A to 5D show that the baffle 123 is disposed perpendicular to the inner periphery of the hub 121 (that is, the baffle 123 forms an included angle of 90 degrees with the inner periphery of the hub 121), the baffle 123 may form an included angle of different angles (for example, 20 degrees, 45 degrees, or other angles) with the inner periphery of the hub 121, and the included angle may be adjusted according to the actual requirement of the user, which is not limited in the invention.

Referring to fig. 5A in conjunction with fig. 3, in the present embodiment, a ratio of the length m of each flow deflector 123 to the diameter r2 of the magnetic permeable shell 1322 is between 0.1 and 0.9.

Referring to fig. 5A, in the present embodiment, the length m of each of the guide vanes 123 is greater than or equal to 10 mm and is greater than or equal to 4 mm from the axial center c of the hub 121.

Referring to fig. 5A, in the present embodiment, the thickness w of each of the flow deflectors 123 is greater than or equal to 1.0 mm.

Referring to fig. 5A to 5C, each of the guide vanes 123 has a rib-shaped or wing-shaped structure. In particular, as shown in fig. 5A to 5C, the guide vane 123 has a rib-shaped structure. However, the guide vanes 123 may have an airfoil-shaped configuration (not shown).

As shown in fig. 5A to 5C, the baffles 123 are disposed at equal angular intervals on the inner periphery of the hub 121. Alternatively, as shown in fig. 5D, the guide vanes 123 may be disposed at unequal angular intervals on the inner circumferential edge of the hub 121.

As shown in fig. 5A to 5D in combination with fig. 4, the lengths m, the thicknesses w, the heights h, or the shapes of the baffles 123 may be the same or different. As shown in fig. 5A, the lengths m, the thicknesses w, the heights h (not shown) or the shapes of the guide vanes 123 are the same. As shown in fig. 5B, the lengths m and m' of the guide vanes 123 are different from each other. As shown in fig. 5C, the lengths m and m 'of the baffles 123 are different from each other, and the thicknesses w and w' of the baffles 123 or the baffles themselves are different from each other. As shown in fig. 5D, the lengths m and m 'of the guide vanes 123, the thicknesses w and w' of the guide vanes 123 or the thickness thereof, and the shapes thereof are different and are disposed at unequal angular intervals. The guide vanes 123 may have different heights h (not shown). In particular, the angle interval of the guide vanes 123, the length m, the thickness w, the height h, or the shape thereof can be adjusted according to the actual requirements of the user, and the present invention is not limited thereto. Thus, the flow guiding plate 123 guides the air flow from the ventilation opening 1213 to the opening 13221 disposed on the top surface of the magnetic guiding casing 1322 to improve the heat dissipation efficiency of the fan itself, so that the air flow dissipates the waste heat from the motor.

Referring to fig. 6 and fig. 2, fig. 6 is a temperature distribution diagram of a fan according to various embodiments of the present invention. In this embodiment, 4 sets of 92 mm x 95 mm diagonal fans were operated at 17500RPM with a power consumption of 240W to compare the self-heat dissipation efficiency. The group 1 fan (as shown in the upper left of fig. 6) and the group 2 fan (as shown in the upper right of fig. 6) are used as the control group, wherein the group 1 fan is the fan 1 having no ventilation opening 1213 and no baffle 123 on the hub 121, the internal temperature (please refer to the position of the motor 13 in fig. 2) is 247 ℃, and the group 2 fan is the fan 1 having a ventilation opening 1213 mm in size and no baffle 123 on the hub 121, and the internal temperature (please refer to the position of the motor 13 in fig. 2) is 179 ℃; the hub 121 of the 3 rd group of fans (shown in the lower left part of fig. 6) is provided with a fan 1 with a 3 mm ventilation opening 1213 and a baffle 123, and the internal temperature (please refer to the position of the motor 13 in fig. 2) is 135 ℃; the hub 121 of the 4 th group of fans (shown in the lower right of fig. 6) is provided with a fan 1 having a 5 mm ventilation opening 1213 and a baffle 123, and the internal temperature (see the position of the motor 13 in fig. 2) is 99 ℃. Specifically, according to the present invention, the hub 121 has the ventilation opening 1213, and the inner periphery of the hub is provided with the flow deflector 123, so as to effectively reduce the temperature inside the fan 1, and further increase the size of the ventilation opening 1213, thereby further improving the self-heat dissipation efficiency of the fan 1.

In summary, the fan 1 of the present invention includes at least one ventilation opening 1213 disposed on the hub 121, a plurality of baffles 123, and at least one opening 13221 disposed on the top surface of the magnetic conductive shell 1322, wherein the ventilation opening 1213 and the opening 13221 are through openings for allowing air flow to pass through. The air flow is guided from the outside of the fan 1 to the inside of the hub 121 through the ventilation opening 1213, and is guided from the inside of the hub 121 to the motor 13 through the opening 13221 on the top surface of the magnetic guiding casing 1322, so as to carry away the waste heat generated by the motor 13 from the fan 1. In addition, the efficiency of self-heat dissipation of the fan 1 can be improved by differently setting the size, proportion, or shape of the ventilation openings 1213 and the size, proportion, or shape of the baffle 123. Further, the distance d between the top 1111 of the base 111 of the fan frame 11 and the bottom 1212 of the hub 121 can further exchange the hot air flow in the motor with the external air flow, thereby improving the heat dissipation efficiency of the fan 1 itself.

The foregoing is by way of example only, and is not intended as limiting. Any equivalent modifications or variations without departing from the spirit and scope of the present invention should be included in the scope of the appended claims.

Description of the symbols

1: fan with cooling device

11: fan frame

11 a: curved surface for flow guiding

111: base seat

1111: top part

12: impeller

121: wheel hub

121 a: leading edge

1211: top part

1212: bottom part

1213: ventilation opening

1214: extension part

122: fan blade

123: flow deflector

13: motor with a stator having a stator core

131: stator structure

132: rotor structure

1321: rotating shaft

1322: magnetic conduction shell

13221: opening of the container

1323: magnetic assembly

14: circuit board

b: straight line

c: axial center

d: distance between two adjacent plates

D1: direction of rotation

D2: direction of rotation

F: side of air inlet

H: height

h: height

m, m': length of

r 1: size of

r 2: diameter of

w, w': and (4) thickness.