TWI397636B - Fan module, heat disspating device using the same, and dust-disposal method - Google Patents

Description

Fan module, heat sink using the fan module, and dust removing method

The present invention relates to a module, an apparatus, and a method, and more particularly to a fan module, a heat sink using the same, and a dust removing method.

In a general fan module, a filter screen is installed on the flow path of the fan to block part of the dust to prevent dust from entering and accumulating in the fan module, causing the fan to be stuck or malfunctioning and thus unable to operate.

However, as the use of the fan module increases, dust will accumulate on the surface of the filter to block the inlet and outlet. If the user does not have the habit of regularly cleaning the filter, the dust accumulated on the surface of the filter will prevent the fan module from entering and exiting, and further affect the heat dissipation effect of the electronic device using the fan module.

The present invention provides a fan module that is less prone to dust accumulation.

The invention provides a heat dissipating device with good heat dissipation effect.

The present invention provides a dust removing method having a good dust removing effect.

The invention provides a fan module, which comprises a fan and a filter screen, wherein the filter screen is arranged on the first-class track of the fan. When the fan rotates at a first speed, the screen assumes a first state, and when the fan rotates at a second speed, the screen assumes a second state, and the first speed is different from the second speed.

In an embodiment of the fan module of the present invention, wherein the screen has elasticity.

In an embodiment of the fan module of the present invention, wherein the screen has a first state and a second state, the screen has different tensions.

In an embodiment of the fan module of the present invention, the screen has a high wind resistance zone and a low wind resistance zone, and the density of the high wind resistance zone of the filter screen is smaller than the density of the low wind resistance zone, and the density of the high wind resistance zone is less than The density of the low wind resistance zone is such that the diameter of the plurality of filter holes located in the high wind resistance zone is smaller than the diameter of the plurality of filter holes located in the low wind resistance zone.

In an embodiment of the fan module of the present invention, a plurality of wind resistance changing elements disposed on the screen are further formed to form a high wind resistance zone and a low wind resistance zone, wherein the plurality of filter holes of the filter screen have the same diameter. Further, the material of the wind resistance changing element is plastic, and the size or shape of the wind resistance changing element is different.

The present invention further provides a heat dissipating device comprising a heat sink and a fan module as described above, wherein the screen is disposed between the fan and the heat sink.

In an embodiment of the heat sink of the present invention, the heat sink is a heat sink fin set, a heat sink or a combination thereof.

In an embodiment of the heat sink of the present invention, wherein the screen contacts the heat sink when the screen is in the first state.

The present invention further provides a dust removing method comprising at least the steps of: providing a screen and a fan, wherein the screen is located on the flow path of the fan; rotating the fan at a first rotation speed, and the screen is in a first state; The fan rotates at a second speed, and the screen assumes a second state, wherein the first speed is different from the second speed.

In an embodiment of the dust removing method of the present invention, the method further comprises: providing the screen with a high wind resistance zone and a low wind resistance zone, and the method of the screen having the high wind resistance zone and the low wind resistance zone is to make the high wind resistance zone The diameter of the filter holes is smaller than the diameter of the plurality of filter holes located in the low wind resistance zone. Alternatively, the method for making the screen have a high wind resistance zone and a low wind resistance zone is to install a plurality of wind resistance changing components in the filter screen, wherein the wind resistance changing component is installed in the high wind resistance zone of the filter screen or the wind resistance installed in the high wind resistance zone. The size of the changing element is larger than the size of the wind resistance changing element mounted in the low wind resistance zone.

In an embodiment of the dust removal method of the present invention, the method further includes disposing a heat sink on the flow path of the fan, and the filter screen is located between the heat sink and the fan, and when the filter screen is in the first state, the filter screen contacts the heat sink.

In the fan module of the present invention and the heat dissipating device using the same, or using the dust removing method of the present invention, when the fan rotates at different rotation speeds, the screen has different tensions, and then the filter net can be accumulated. The dust shakes off, prolongs the service life of the fan module, and the heat dissipation module has a good heat dissipation effect.

The above described features and advantages of the present invention will be more apparent from the following description.

FIG. 1 is a schematic diagram of a fan module according to an embodiment of the invention. Referring to FIG. 1 , the fan module 100 includes a fan 110 and a filter screen 120 , wherein the filter screen 120 is disposed on the first-class track P of the fan 110 . In the present embodiment, the screen 120 has elasticity, and when the fan 110 does not start to rotate, the screen 220 is naturally suspended.

2 is a flow chart of a dust removing method of the present invention. For convenience of description, the fan module of FIG. 1 is described in conjunction with the flowchart of the dust removing method of FIG. 2, but the fan module for limiting the present invention is not necessarily used in conjunction with the dust removing method of the present invention. After referring to the present specification, those skilled in the art may separately use the fan module and the dust removing method separately. Referring to FIG. 1 and FIG. 2 simultaneously, the fan module 100 described above is provided. In step S110, the screen 120 is naturally suspended. Figure 3 is a schematic view showing the screen in a first state when the fan is rotated at the first rotational speed. Referring to FIG. 2 and FIG. 3 at the same time, the fan 110 is rotated at a first rotation speed, and the screen 120 is in a first state, as in step S120. This first rotational speed may be the maximum rotational speed of the fan 110, while the screen 120 at this time is subjected to the maximum wind flow of the fan 110 to have a strong tension. Fig. 4 is a schematic view showing the screen in a second state when the fan is rotated at the second rotation speed. Then, the fan 110 is rotated at a second rotation speed, and the screen 120 is in a second state, as in step S130. Since the second rotation speed is smaller than the first rotation speed, the strainer 120 has a small tension at this time. Different speeds of the fan 110 cause different states of the screen 120, and the screens 120 of different states have different tensions, and the tension of the screen 120 changes instantaneously when the speed is switched, causing the vibration of the screen 120, so that the screen 120 can be shaken off. The dust accumulated on the screen 120 keeps the filter 120 clean and allows the fan module 100 to continue to operate.

The rotation speed of the fan 110 may be manually controlled by a user via a program or a switching mechanism, or may be automatically switched by a program or a switching mechanism setting timing, and set according to usage requirements. In addition, the fan module 100 may be installed in the computer host, and the first speed may be an instantaneous maximum speed when the fan 110 starts to rotate when the computer is turned on, and the second speed may be when the computer is in operation. The fan 110 continues to rotate at a lower rotational speed. Of course, the first rotation speed and the second rotation speed are only used as examples, and there is no limitation here, and the user can set it according to requirements.

In addition, the screen 120 can have a high wind resistance zone 120a and a low wind resistance zone 120b, and the wind pressure flowing through the high wind resistance zone 120a and the low wind resistance zone 120b can aggravate the vibration of the filter screen 120, thereby improving the dust removal effect.

Figure 5 is a schematic illustration of one embodiment of a high and low wind resistance zone of a screen. Referring to FIG. 5, in this embodiment, the high wind resistance zone 120a and the low wind resistance zone 120b of the screen 120 may be formed by density variation, wherein the density of the high wind resistance zone 120a is greater than the density of the low wind resistance zone 120b. In the present embodiment, the screen 120 has a plurality of filter holes 120c, and the diameter of the filter holes 120c located in the high wind resistance region 120a is smaller than the diameter of the filter holes 120c located in the low wind resistance region 120b.

Figure 6 is a schematic illustration of another embodiment of the high and low wind resistance zones of the screen. Referring to FIG. 6 , in the embodiment, the filter holes 120c of the filter screen 120 have the same diameter, and the high wind resistance area 120a and the low wind resistance area 120b are formed by using the plurality of wind resistance changing elements 130 on the filter screen 120. The material of the wind resistance changing element 130 is plastic, and the size or shape of the wind resistance changing element 130 may be different depending on its configuration position. For example, the shape of the wind resistance changing element 130 may be circular, elliptical or other shapes, depending on actual needs. In addition, the size of the wind resistance changing element 130 disposed in the high wind resistance zone 120a is larger than the size of the wind resistance changing element 130 disposed in the low wind resistance zone 120b, so that the wind pressure of the high wind resistance zone 120a is greater than the wind pressure of the low wind resistance zone 120b.

7 is a perspective view of a heat sink using the fan module of FIG. 1. Referring to FIG. 7 , the heat sink 300 includes a heat sink 200 and the fan module 100 , wherein the screen 120 is disposed between the heat sink 200 and the fan 110 , and the heat sink 200 can be a heat sink fin group, a heat sink, or A combination of a heat sink fin set and a heat sink.

It should be noted that the position of the fan module 100 and the heat sink 200 may be close to each other so that the screen 120 contacts the heat sink 200 and then shakes off the dust on the filter screen 120. When the fan 110 of the fan module 100 rotates at the first rotation speed and the screen 120 is in the first state, the screen 120 contacts the heat sink 200, as shown in FIG. 8; when the fan 110 of the fan module 100 rotates at the second rotation speed and When the screen 120 is in the second state, the screen 120 does not contact the heat sink 200, as shown in FIG. The fan 110 switches between the first rotational speed and the second rotational speed, and the filter screen 120 contacts and leaves the heat sink 200, and the filter screen 120 is struck against the heat sink 200. When the filter screen 120 contacts the heat sink 200, the filter screen 120 also contacts the heat sink 200. The dust accumulated on the net 120 is shaken off. In addition, if the wind resistance change element 130 is disposed on the filter screen 120, the contact of the wind resistance change element 130 of the plastic material with the heat sink 200 increases the vibration of the filter screen 120 and enhances the effect of dust accumulated on the shake-off filter screen 120. Incidentally, when the screen 120 hits the heat sink 200, it also ejects dust accumulated on the heat sink 200.

In summary, using the fan module of the present invention, the heat dissipating device using the fan module, and the dust removing method, the rotation speed of the fan allows the filter to vibrate under different tensions, thereby shaking off the dust accumulated on the filter net. Keeping the filter clean will not only extend the service life of the fan module, but also allow the heat sink using the fan module to have a good heat dissipation effect.

Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

100. . . Fan module

110. . . fan

120. . . Filter

120a. . . High wind resistance zone

120b. . . Low wind resistance zone

120c. . . Filter hole

130. . . Wind resistance change element

200. . . heat sink

300. . . Heat sink

P. . . Runner

S110. . . A fan and a strainer are provided, wherein the filter is located on the flow path of the fan

S120. . . The fan rotates at the first speed, and the filter is in the first state

S130. . . The fan rotates at the second rotation speed, and the filter screen is in the second state

FIG. 1 is a schematic diagram of a fan module according to an embodiment of the invention.

2 is a flow chart of a dust removing method of the present invention.

Figure 3 is a schematic view showing the screen in a first state when the fan is rotated at the first rotational speed.

Fig. 4 is a schematic view showing the screen in a second state when the fan is rotated at the second rotation speed.

Figure 5 is a schematic illustration of one embodiment of a high and low wind resistance zone of a screen.

Figure 6 is a schematic illustration of another embodiment of the high and low wind resistance zones of the screen.

7 is a perspective view of a heat sink using the fan module of FIG. 1.

Figure 8 is a schematic view of the fan rotating at a first rotational speed and the screen in a first state and contacting the heat sink.

Figure 9 is a schematic illustration of the fan rotating at a second rotational speed and the screen in a second state without contacting the heat sink.

100. . . Fan module

110. . . fan

120. . . Filter

130. . . Wind resistance change element

200. . . heat sink

300. . . Heat sink

Claims (24)

A fan module includes: a fan; and a filter screen disposed on the first-class track of the fan, wherein when the fan rotates at a first rotation speed, the filter screen assumes a first state, and when the fan is in a first state, When the second rotation speed is rotated, the screen has a second state, and the first rotation speed is different from the second rotation speed, wherein the filter screen has a high wind resistance zone and a low wind resistance zone. The fan module of claim 1, wherein the filter has elasticity. The fan module of claim 1, wherein the screen has different tensions when the screen is in the first state and the second state. The fan module of claim 1, wherein the density of the high wind resistance zone of the filter is greater than the density of the low wind resistance zone. The fan module of claim 1, wherein the plurality of filter holes located in the high wind resistance zone have a smaller diameter than the plurality of filter holes located in the low wind resistance zone. The fan module of claim 1, further comprising a plurality of wind resistance changing elements disposed on the filter net to form the high wind resistance zone and the low wind resistance zone, wherein the plurality of filters of the filter mesh The holes have the same caliber. The fan module of claim 6, wherein the wind is The material of the resistance change component is plastic. The fan module of claim 6, wherein the wind resistance changing elements are different in size or shape. A heat dissipating device includes: a heat sink; a fan module comprising: a fan; and a filter screen disposed between the fan and the heat sink and located on the first-class track of the fan, wherein the fan is When the first rotational speed is rotated, the filter screen is in a first state, and when the fan is rotated at a second rotational speed, the filter mesh is in a second state, and the first rotational speed is different from the second rotational speed, wherein the filter The screen has a high wind resistance zone and a low wind resistance zone. The heat sink of claim 9, wherein the heat sink is a heat sink fin set, a heat sink board, or a combination thereof. The heat sink of claim 9, wherein the screen has elasticity. The heat sink of claim 9, wherein the screen has different tensions when the screen is in the first state and the second state. The heat sink of claim 9, wherein the density of the high wind resistance zone of the screen is greater than the density of the low wind resistance zone. The heat dissipation device of claim 13, wherein the plurality of filter holes located in the high wind resistance zone have a smaller diameter than the plurality of filter holes located in the low wind resistance zone. The heat dissipating device of claim 9, further comprising a plurality of wind resistance changing elements disposed on the filter net to form the high wind resistance zone and the low wind resistance zone, wherein the plurality of filter holes of the filter mesh The caliber is the same. The heat dissipating device of claim 15, wherein the wind resistance changing elements are made of plastic. The heat dissipating device of claim 15, wherein the wind resistance changing elements are different in size or shape. The heat sink of claim 9, wherein the screen contacts the heat sink when the screen is in the first state. A dust removal method includes: providing a filter screen and a fan, wherein the filter screen is located on a flow path of the fan; the filter screen has a high wind resistance zone and a low wind resistance zone; and the fan rotates at a first rotation speed, And the screen is in a first state; and the fan is rotated at a second speed, and the screen is in a second state, wherein the first speed is different from the second speed. The method of dust removal according to claim 19, wherein the The screen has the high wind resistance zone and the low wind resistance zone in such a manner that the diameter of the plurality of filter holes located in the high wind resistance zone is smaller than the diameter of the plurality of filter holes located in the low wind resistance zone. The dust removing method according to claim 19, wherein the screen has the high wind resistance zone and the low wind resistance zone by installing a plurality of wind resistance changing elements on the screen. The dust removing method according to claim 21, wherein the wind resistance changing elements are installed in the high wind resistance region of the filter. The dust removing method of claim 21, wherein the wind resistance changing elements installed in the high wind resistance zone are larger in size than the wind resistance changing elements installed in the low wind resistance zone. The method for dust removal according to claim 19, further comprising: disposing a heat sink on the flow path of the fan, wherein the filter screen is located between the heat sink and the fan, and the filter screen is in the first state The screen contacts the heat sink.