TWI696065B - Cooling fan - Google Patents

Abstract

The present invention discloses a cooling fan includes a frame having an opening and an opening side wall, a blade structure and a light emitting module. The blade structure is disposed in the opening and rotatable relative to the frame. The light emitting module is disposed on the frame and used to generate plural light beams, such that the plural light beams pass through the opening side wall and is projected to the blade structure. The light emitting module and the blade structure are disposed individually, so the damage of the light emitting module from shaking can be decreased. Besides, the control stability of the light emitting module and the blade structure can be risen.

Description

Cooling fan

The invention relates to a heat dissipation device, in particular to a heat dissipation fan.

Generally speaking, electronic devices are accompanied by thermal energy during operation, and the thermal energy will affect the working performance and stability of electronic components in the electronic devices, and even shorten the life of electronic components. Therefore, heat dissipation equipment, such as a heat dissipation fan, is often arranged in the electronic device, which can eliminate the heat energy generated during the operation of the electronic device to ensure that the electronic device exerts better performance. In order to increase the applicability and entertainment, a transparent casing of an electronic device is proposed on the market, which can watch various components inside the electronic device. Therefore, the light-emitting elements are respectively arranged on the elements to have a light-emitting function, and the elements can indicate their operating conditions by different light-emitting effects. Of course, these components include a cooling fan with luminous effect.

Please refer to FIG. 1, which is a schematic diagram of a conventional cooling fan. The conventional cooling fan 1 includes a fan frame (not shown in the figure), a fan blade structure 11, an electrical connection portion 12 and a plurality of light emitting modules 13. The fan blade structure 11 includes a central portion 111 and a plurality of fan blades 112. The center portion 111 is fixed to the fan frame and can rotate relative to the fan frame, and a plurality of fan blades 112 are connected to the center portion 111, and can rotate synchronously with the center portion 111, thereby driving the air flow to achieve the heat dissipation effect of accelerating air circulation . The electrical connection portion 12 is connected to an external power source (not shown in the figure), thereby obtaining power to drive the cooling fan 1.

Each light-emitting module 13 corresponds to a fan blade 112, and is disposed in a corresponding Fan blade 112. The light emitting module 13 includes a circuit board 131, a plurality of light emitting diodes 132, a rotation speed sensing unit 133, and a control unit 134. The circuit board 131 is fixed on the corresponding fan blade 112 by screwing, and the plurality of light-emitting diodes 132 are disposed on the circuit board 131, and its function is to be driven to generate a plurality of light beams at a specific light-emitting frequency to provide flicker Glow effect. The rotation speed sensing unit 133 is disposed on the circuit board 131 and can detect the rotation speed of the fan blade 112 to obtain a rotation speed signal. The control unit 134 is disposed on the circuit board 131 and electrically connected to the complex light-emitting diode 132 and the speed sensing unit 133, respectively, which can receive the speed signal from the speed sensing unit 133, and control the light emitting frequency according to the speed signal, so that the complex number The light emitting diode 132 generates a complex light beam at a specific light emitting frequency.

Among them, the flashing light effect generated by the plurality of light-emitting diodes 132 at a specific light-emitting frequency can be matched with the rotation speed of the plurality of fan blades 112, thereby allowing the user to feel different visual effects. For example, in response to the phenomenon of the user's visual retention, the cooling fan 1 can provide a static visual effect, that is, the plurality of fan blades 112 are displayed in a stationary state, but actually the plurality of fan blades 112 continue to rotate.

However, since the light-emitting module 13 of the conventional cooling fan 1 is disposed on the fan blade 112, and the fan blade 112 must continue to rotate, the components of the light-emitting module 13 are easily damaged due to long-term shaking, and these components may even Fall off from fan blade 112. Therefore, there is a need for a cooling fan that can operate stably.

The purpose of the present invention is to provide a cooling fan that can provide special visual effects and can operate stably.

In a preferred embodiment, the present invention provides a cooling fan, which includes a fan frame, a fan blade structure, and a light emitting module. The fan frame has an opening and an opening side wall, The fan blade structure is disposed in the opening and can rotate relative to the fan frame. The light-emitting module is arranged on the fan frame and used for generating a plurality of light beams, so that the plurality of light beams penetrate the side wall of the opening and project to the fan blade structure.

In a preferred embodiment, the fan frame further includes a body, a receiving structure, a base, and a fixed column. The opening is located at the center of the body, and the side wall of the opening surrounds the opening. The accommodating structure is arranged in a peripheral manner at the periphery of the body for accommodating the light emitting module therein. The seat body is connected to the body and is located at the center of the opening for supporting the fan blade structure thereon and fixing the fan blade structure in the opening.

In a preferred embodiment, the light emitting module includes a circuit board, a plurality of light emitting elements, and a control unit. The circuit board is arranged in the accommodating structure, and the plurality of light-emitting elements are arranged on the circuit board and extend into the accommodating structure for generating a plurality of light beams. Wherein, the plurality of light-emitting elements surround the opening, so that the plurality of light beams can penetrate the sidewall of the opening and project to the fan blade structure. The control unit is disposed on the circuit board, and is used to control the complex light emitting elements to generate the complex light beam at a first light emitting frequency or a second light emitting frequency.

In a preferred embodiment, when the control unit controls the complex light emitting elements to generate the complex light beam at the first light emitting frequency, the complex fan blades rotate at a first rotational speed; and when the control unit controls the complex light emitting elements When the complex light beam is generated at the second light emitting frequency, the complex fan blades rotate at a second rotation speed.

In summary, the cooling fan of the present invention separates the light emitting module and the fan blade structure to replace the method of installing the light emitting module on the fan blade structure, so the cooling fan of the present invention can reduce the probability of damage to the light emitting module due to shaking . On the other hand, since the light-emitting module and the fan blade structure are separately arranged, compared with the conventional technology, the light-emitting element of the heat dissipation fan of the present invention has better control stability on flicker. Similarly, because the light emitting module and the fan blade structure are separately arranged, compared with the conventional technology, the fan blade of the present invention has better control stability on the rotation speed of the fan blade. Also due to the light emitting module and The fan blade structures are separately arranged, so the space inside the heat dissipation fan can be effectively used to set up the light emitting module, so as to effectively reduce the volume of the fan blade structure. In other words, the cooling fan of the present invention can be applied to a small-sized electronic device, such as a cooling device in a computer host.

1, 2‧‧‧ cooling fan

11, 22‧‧‧fan blade structure

12‧‧‧Electrical connection

13, 23‧‧‧ light module

21‧‧‧Fan frame

111, 221‧‧‧ Central Department

112、222‧‧‧fan blade

131, 231‧‧‧ circuit board

132‧‧‧ LED

133‧‧‧Speed sensing unit

134, 233‧‧‧ control unit

211‧‧‧Opening

212‧‧‧opening side wall

213‧‧‧Body

214‧‧‧ containment structure

215‧‧‧Body

223‧‧‧Drive module

232‧‧‧Lighting element

FIG. 1 is a schematic diagram of a conventional cooling fan.

2 is an exploded schematic view of the structure of the cooling fan of the present invention in a preferred embodiment.

FIG. 3 is a schematic structural view of the cooling fan of the present invention in a preferred embodiment.

4 is a schematic cross-sectional view of the structure of the cooling fan of the present invention in a preferred embodiment.

FIG. 5 is a schematic structural view of the heat dissipation fan of the present invention in a preferred embodiment generating a first still visual effect.

FIG. 6 is a schematic structural view of the cooling fan of the present invention in a preferred embodiment for generating a second still visual effect.

FIG. 7 is a schematic structural view of the cooling fan of the present invention in a preferred embodiment generating a third static visual effect.

The invention provides a cooling fan to solve the problems of the conventional technology. Please refer to FIG. 2, FIG. 3 and FIG. 4 at the same time. FIG. 2 is a schematic exploded view of the structure of the cooling fan of the present invention in a preferred embodiment, and FIG. 3 is a schematic view of the structure of the cooling fan of the present invention in a preferred embodiment. 4 is a schematic cross-sectional view of the structure of the cooling fan of the present invention in a preferred embodiment. The cooling fan 2 of the present invention includes a fan frame 21, a fan blade structure 22, and a light emitting module 23. The fan frame 21 includes an opening 211, an opening sidewall 212, a body 213, a receiving structure 214, and a seat 215. Opening 211 Located at the center of the body 213, the opening sidewall 212 surrounds the opening 211 and is located inside the body 213. The accommodating structure 214 is disposed around the periphery of the body 213 in a surrounding manner, and it can accommodate the light emitting module 23 therein. The seat body 215 is connected to the body 213 and is located at the center of the opening 211. It can carry the fan blade structure 22 on it and fix the fan blade structure 22 in the opening 211. In the preferred embodiment, the body 213 is made of a transparent material, so the side wall 212 of the opening located inside the body 213 is transparent and has a light-transmitting effect.

The fan blade structure 22 is disposed in the opening 211 and can rotate relative to the fan frame 21. The fan blade structure 22 includes a central portion 221, a plurality of fan blades 222 and a driving module 223. The central portion 221 is fixed on the base 215 (that is, located in the opening 211 ), and can rotate relative to the fan frame 21. The plural blades 222 are connected to the central portion 221 and can rotate synchronously with the central portion 221 to drive the air flow. The driving module 223 is disposed on the base 215 and connected to the central portion 221. Its function is to drive the central portion 221 to rotate at various rotation speeds. In the preferred embodiment, the plural blades 222 are integrally formed with the central portion 221, which is for illustrative purposes only, and not limited thereto. In another preferred embodiment, the plurality of blades can also be connected to the center by various combinations.

In FIGS. 2 and 4, the light-emitting module 23 is disposed on the fan frame 21, and its function is to generate a plurality of light beams, so that the plurality of light beams penetrate the side wall 212 of the opening and project onto the fan blade structure 22. The light emitting module 23 includes a circuit board 231, a plurality of light emitting elements 232, and a control unit 233. The circuit board 231 is disposed in the accommodating structure 214, and the plurality of light emitting elements 232 are disposed on the circuit board 231 and extend into the accommodating structure 214, and are disposed in a manner to surround the opening 211. The function of the plurality of light emitting elements 232 is to generate a plurality of light beams, and the plurality of light beams can pass through the transparent opening sidewall 212 and be projected onto the fan blade structure 22. The control unit 233 is disposed on the circuit board 231 and electrically connected to the plurality of light-emitting elements 232, which can control the plurality of light-emitting elements 232 to generate a plurality of light beams at different light-emitting frequencies, that is, to generate a blinking effect at different light-emitting frequencies. In the preferred embodiment, the light-emitting element 232 can be selected from various light-emitting diodes, such as light-emitting diodes or micro LEDs (Micro LED), The circuit board 231 is a printed circuit board (PCB) or a flexible circuit board (FPC).

The light-emitting frequencies preset in the control unit 233 can be matched with the rotation speed of the plurality of fan blades 222. When the plurality of light-emitting elements 232 generate a plurality of light beams at the light-emitting frequencies, the cooling fan 2 can provide a static visual effect . In other words, while the plurality of blades 222 rotates, in conjunction with the light flickering effect provided by the plurality of light-emitting elements 232 and the user's visual persistence phenomenon, the plurality of blades 222 appear to be in a stationary state.

Please refer to FIG. 3 and FIG. 5 at the same time. FIG. 5 is a schematic structural view of the cooling fan of the present invention in a preferred embodiment for generating the first static visual effect. Figure 3 shows nine blades 222. When the control unit 233 controls the plurality of light emitting elements 232 to generate a plurality of light beams at the first light emitting frequency, the driving module 233 controls the plurality of fan blades 222 to rotate at the first rotation speed, and can be synchronized with the first blinking effect provided by the plurality of light emitting elements 232 Phenomenon, whereby the cooling fan 2 can provide the first still visual effect, as shown in FIG. 5. The first still visual effect refers to that when the plural blades 222 rotate, the plural blades 222 appear to be stationary and can display the state of nine blades 222.

Please refer to FIG. 3 and FIG. 6 at the same time. FIG. 6 is a schematic structural view of the cooling fan of the present invention in a preferred embodiment for generating a second still visual effect. Figure 3 shows nine blades 222. When the control unit 233 controls the plurality of light emitting elements 232 to generate a plurality of light beams at the second light emitting frequency, the driving module 233 controls the plurality of fan blades 222 to rotate at a second rotation speed, and can be synchronized with the second blinking effect provided by the plurality of light emitting elements 232 Phenomenon, whereby the cooling fan 2 can provide a second still visual effect, as shown in FIG. 6. The second still visual effect refers to that when the plurality of blades 222 rotates, the plurality of blades 222 appear to be stationary and can display the state of 18 blades 222.

Please refer to FIG. 3 and FIG. 7 at the same time. FIG. 7 is a schematic structural view of the third embodiment of the cooling fan of the present invention in a preferred embodiment. Figure 3 shows 9 fan blades 222. When the control unit 233 controls the plurality of light emitting elements 232 to generate the plurality of light beams at the third light emitting frequency, the driving module 233 controls the plurality of fan blades 222 to rotate at the third rotation speed, and can be synchronized with the third blinking effect provided by the plurality of light emitting elements 232 Phenomenon, whereby the cooling fan 2 can provide a third still visual effect, as shown in FIG. 7. The third static visual effect refers to that when the plurality of blades 222 rotates, the plurality of blades 222 appear to be stationary and can display the state of 27 blades 222.

It should be noted that there are two. First, the third rotation speed is faster than the second rotation speed, and the second rotation speed is faster than the first rotation speed. The third light-emitting frequency is higher than the second light-emitting frequency, and the second light-emitting frequency is higher than the first light-emitting frequency. Second, the first light frequency, the second light frequency, and the third light frequency preset in the control unit 233 are obtained through precise calculation and repeated experiments, so that the flicker effect generated by the multiple light-emitting elements 232 can be combined with the multiple fan blades 222 speed matching.

According to the above, the heat dissipation fan of the present invention separates the light emitting module and the fan blade structure to replace the method of disposing the light emitting module on the fan blade structure, so the heat dissipating fan of the present invention can reduce the probability of damage to the light emitting module due to shaking . On the other hand, since the light-emitting module and the fan blade structure are separately arranged, compared with the conventional technology, the light-emitting element of the heat dissipation fan of the present invention has better control stability on flicker. Similarly, because the light emitting module and the fan blade structure are separately arranged, compared with the conventional technology, the fan blade of the present invention has better control stability on the rotation speed of the fan blade.

In addition, the heat dissipation fan of the present invention is not provided with a light emitting module on the fan blade structure, so the space inside the heat dissipation fan can be effectively used to dispose the light emitting module, so as to effectively reduce the volume of the fan blade structure. In other words, the cooling fan of the present invention can be applied to a small-sized electronic device, such as a cooling device in a computer host.

The above are only preferred embodiments of the present invention and are not intended to limit the scope of the patent application of the present invention. Therefore, any other equivalent changes or modifications made without departing from the spirit of the present invention should be included in this case Within the scope of patent application.

2‧‧‧cooling fan

21‧‧‧Fan frame

22‧‧‧Fan blade structure

23‧‧‧Light Module

211‧‧‧Opening

212‧‧‧opening side wall

213‧‧‧Body

214‧‧‧ containment structure

215‧‧‧Body

221‧‧‧Central Department

222‧‧‧leaf

223‧‧‧Drive module

231‧‧‧ circuit board

232‧‧‧Lighting element

233‧‧‧Control unit

Claims (10)

A cooling fan includes: a fan frame with an opening and a side wall with an opening; a fan blade structure disposed in the opening and rotatable relative to the fan frame; wherein, the fan blade structure can be a first A rotation speed or a second rotation speed; and a light emitting module, which is arranged on the fan frame and used for generating a plurality of light beams, so that the plurality of light beams penetrate the side wall of the opening and project onto the fan blade structure; wherein, the light is emitted The module can generate the complex light beam at a first light emitting frequency or a second light emitting frequency; when the light emitting module generates the complex light beam at the first light emitting frequency, the fan blade structure rotates at the first speed to make the light emitting The module and the fan structure produce a co-modulation phenomenon, and the cooling fan provides a first still visual effect; and when the light emitting module generates the complex light beam at the second light emitting frequency, the fan structure at the second speed The rotation causes the light emitting module and the fan blade structure to have a co-modulation phenomenon, and the cooling fan provides a second still visual effect. The heat dissipation fan as described in item 1 of the patent application scope, wherein the fan frame further includes: a body, the opening is located at the center of the body, and the side wall of the opening surrounds the opening; and a receiving structure surrounds the opening The outer periphery of the body is arranged to accommodate the light-emitting module therein; and a base is connected to the body and is located at the center of the opening for carrying the fan blade structure thereon and fixing the The fan blade structure is in the opening. The heat dissipation fan as described in item 2 of the patent application scope, wherein the fan blade structure includes: a central portion, fixed on the seat body, and rotatable relative to the fan frame; A plurality of blades are connected to the central part and can rotate synchronously with the central part; and a driving module is arranged on the base body and connected to the central part to drive the central part to rotate. The heat dissipation fan as described in item 3 of the patent application scope, wherein the plurality of fan blades are integrally formed with the central portion. The heat dissipation fan as described in item 2 of the patent application scope, wherein the light emitting module includes: a circuit board disposed in the containing structure; a plurality of light emitting elements are disposed on the circuit board and extend into the containing structure, For generating a plurality of light beams; wherein the plurality of light-emitting elements surround the opening so that the plurality of light beams can penetrate the sidewall of the opening to project onto the fan blade structure; and a control unit is provided on the circuit board for Controlling the complex light emitting element to generate the complex light beam at the first light emitting frequency or the second light emitting frequency. The heat dissipation fan as described in item 5 of the patent application range, wherein, when the control unit controls the complex light emitting elements to generate the complex light beam at the first light emitting frequency, a driving module of the fan blade structure controls the complex fan blades Rotating at the first rotation speed; and when the control unit controls the complex light emitting elements to generate the complex light beam at the second light emitting frequency, the driving module controls the complex fan blades to rotate at the second rotation speed. The heat dissipation fan as described in item 6 of the patent application range, wherein the second rotation speed is faster than the first rotation speed, and the second light emitting frequency is higher than the first light emitting frequency. The cooling fan as described in item 5 of the patent application scope, wherein the circuit board is a printed circuit board or a flexible circuit board. The heat dissipation fan as described in item 5 of the patent application scope, wherein the plural light-emitting elements are Light diode or miniature light emitting diode. The cooling fan as described in item 2 of the patent application scope, wherein the system is made of transparent materials.

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