CN1967442A - Dust removal method using cooling fan and dust removal device for computer equipment - Google Patents

Abstract

The invention provides a method for removing dust by using a cooling fan and a dust removing device for computer equipment. The computer device may be a notebook computer, a desktop computer, or a server. The method of the invention comprises the following steps: judging whether the temperature of the electronic part is higher than a specific temperature or judging whether the rotating speed of the cooling fan is lower than a specific rotating speed; and if yes, reversing the cooling fan until the timer reaches a specific time.

Description

Method for removing dust by cooling fan and dust removal device for computer equipment

technical field

The invention relates to the application of a heat dissipation fan, in particular to a method for removing dust by using the heat dissipation fan and a dust removal device for computer equipment.

Background technique

Most of today's computer equipment is light, thin and small, and the emphasis is on fast speed and good performance. In order to make a computer faster, it often depends on whether the performance of the electronic components inside the computer equipment can be fully utilized. When the electronic components inside the computer equipment play their role, the operating frequency of the electronic components will increase accordingly. In order to avoid the high temperature damage of the electronic components due to the high operating frequency, usually the computer equipment industry will set up a cooling fan to reduce the temperature of the electronic components. temperature of the part.

This cooling fan draws the cold air outside the computer equipment into the computer equipment, and utilizes the flow of cold air to reduce the temperature of electronic components. However, the cooling fan can not only inhale cold air, but also inhale dust, and because the electronic components inside the computer equipment are densely arranged, it often makes the air flow inside the computer equipment more obstructed (larger flow resistance). It will easily make the cooling fan and/or electronic parts be covered with dust. Moreover, these dusts are difficult to be brought to the outside of the computer equipment along with the hot air because the air flow inside the computer equipment is relatively obstructed.

When the heat dissipation fan and/or electronic components accumulate a large amount of dust, the efficiency of the heat dissipation fan will decrease (for example, the speed will slow down), that is, the flow of cold air it can inhale will decrease, and the heat dissipation performance will also decrease. In this way, the temperature of the electronic parts is not easy to drop, the efficiency of the computer equipment will be deteriorated, and the electronic parts are easily damaged due to high temperature.

Contents of the invention

The purpose of the present invention is to control the heat dissipation fan of the computer equipment to make it reverse at a specific time to achieve the effect of dust removal.

Another object of the present invention is to prevent the electronic components in the computer equipment from being reduced in efficacy or even shortened in life due to dust contamination through the dust removal operation of the cooling fan of the computer equipment.

Another object of the present invention is to fully exert the due functions of the computer equipment through the dust removal operation of the cooling fan of the computer equipment and the function of the electronic components in the computer equipment.

In view of this, the present invention provides a method for removing dust by using a cooling fan and a dust removal device for computer equipment. The computer equipment referred to herein includes notebook computers, desktop computers, or servers. Dust removal method of the present invention comprises:

Step 1: Determine whether the temperature of an electronic part is higher than a specific temperature. In a preferred embodiment, the electronic part can be a processor (such as a CPU), a memory, a north bridge crystal, a hard disk, a VGA display card, or other similar people . Preferably, the specified temperature is between 60°C and 100°C.

Step 2: If the judgment of step 1 is "Yes", make the cooling fan reverse until the timer reaches a specific time. In a preferred embodiment, the specified time is less than 10 seconds.

If the detection device (Sensor) detects that the temperature of the electronic parts is lower than a specific temperature within a specific time during the reversal, it means that the dust has been removed, and at this time, it is not necessary to wait until the specific time is reached before ending the cooling fan. Turn, but can end the reversal early. Therefore, in this preferred embodiment, step 2 may further include repeating the step of: judging whether the temperature of the electronic component is higher than the specified temperature, and if the judgment is "no", then stopping the reverse rotation of the cooling fan.

In addition to judging whether the cooling fan is operating or not based on the temperature, the present invention can also use the speed of the cooling fan as a judgment criterion, that is, if the speed of the cooling fan is lower than a certain speed, it means that there is too much dust. So similar to the above, when the detection device detects that the speed of the cooling fan is normal within a certain time during the reversal, it means that the dust has been removed. reversal, and the reversal can be terminated early. Therefore, in this preferred embodiment, step 2 may further include repeating the step of: judging whether the rotation speed of the cooling fan is lower than a specific rotation speed, and if the judgment is "no", then stopping the rotation of the cooling fan. Preferably, the specified rotational speed is between 3000 and 5000 revolutions per second (RPM; Revolutions Per Minute).

The invention can be applied to make the heat dissipation fan operate in reverse to achieve the purpose of dust removal when the computer equipment is shut down. Therefore, in a preferred embodiment, before the step of judging whether the temperature of the electronic component is higher than a specific temperature, further steps are included:

receiving a shutdown command, such as a shutdown command (command) issued by the operating system; and

Calling an interrupt interface parameter, the interrupt interface parameter is defined in the basic input output system (BIOS) of the computer, thereby achieving the operation of preparing for shutdown.

When the dust removal operation is completed, the present invention can also record the summary content of the dust removal operation for reference by technicians of computer equipment, such as recording time, rotating speed, temperature, etc. What is the speed, and/or what is the temperature of the electronic parts, etc. Therefore, in this preferred embodiment, after the step of reversing the cooling fan until the timer reaches a specific time, the present invention may further include the steps of:

Reading an inversion data of the cooling fan, for example, the inversion data may include the rotation speed data of the cooling fan, the temperature data of the electronic parts or the time data of the timer; and

Write the inversion data of the cooling fan into a storage, for example, the storage can be CMOS, EEPROM, BIOS Flash ROM, or TPM.

Or, the present invention can also be applied to the electronic components in the computer equipment when they are idle, instead of being applied to the above-mentioned shutdown, the cooling fan can be reversed to achieve the purpose of dust removal. Therefore, in one embodiment, the present invention further includes the step of:

Judging whether the electronic part is in an idle state (idle), for example, the C2 or C3 register (register) of the Nanqiao crystal can be detected to judge; and

If the judgment is "Yes", then proceed to the step of judging whether the temperature of the electronic component is higher than the specified temperature.

In step 1 of the above method, "the temperature of the electronic component" is used as the judging criterion, and in another embodiment of the present invention, the "rotating speed of the cooling fan" is used as the judging criterion. In this embodiment, the method disclosed in the present invention includes:

judging whether the speed of the cooling fan is lower than a specific speed, similarly, in one embodiment, the specific speed is between 3000 and 5000 revolutions per second (RPM), and

If it is judged as "yes", the cooling fan is reversed until the timer reaches a specific time.

Similar to the aforementioned method, in the step of reversing the cooling fan until the timer reaches a specific time, it is also possible to determine whether the temperature of the electronic parts has dropped, or to judge that the speed of the cooling fan has returned to normal, as a means to stop the cooling fan from reversing. condition. The method steps are also described above, so no more details are given here.

Likewise, in this embodiment, the above-mentioned dust removal step can be operated when the computer is turned off or when the computer is idle. The method steps are also described above, so no more details are given here.

In this preferred embodiment, the summary content of the dust removal operation can also be recorded for the reference of the technicians of the computer equipment, for example, the time, rotation speed, temperature, etc. can be recorded, that is, when the cooling fan reverses, the speed of the reverse How much, and/or the temperature of electronic parts, etc. The method steps are also described above, and will not be repeated here.

In addition, the present invention also discloses a dust removal device for computer equipment, which utilizes the above dust removal method, wherein the computer equipment can be a notebook computer, a desktop computer, or a server. The dust removal device includes: a cooling fan capable of forward and reverse rotation, a controller electrically connected to the cooling fan, and a detection device electrically connected to the controller to detect the temperature of electronic parts, preferably also includes A timer electrically connected to the controller. The dust removal device of the present invention can realize the above dust removal method through the firmware stored in the controller.

In a preferred embodiment, the dust removal device also includes a computer basic input and output system (BIOS) and an operating system (OS). The computer BIOS can define an interrupt interface parameter, so that the dust removal device can Interface parameters perform dust removal when performing shutdown operations.

Description of drawings

Fig. 1 is a dust removal device according to the present invention, showing its system block diagram.

FIG. 2 is a schematic diagram showing that the firmware controls the cooling fan through the controller according to the present invention.

3A, 3B, 4A and 4B are different flowcharts showing several kinds of reverse rotation of the cooling fan according to the method of the present invention.

5A and 5B are flow charts showing the reverse rotation of the cooling fan when the utility enters the shutdown state according to an embodiment of the present invention.

FIGS. 6A and 6B are flowcharts showing the reverse rotation of the cooling fan when idle, according to another embodiment of the present invention.

Description of reference symbols

1. Dust removal device 11. Cooling fan

12. Timer 13. Controller

14. Detection device 15. Electronic parts

16. Firmware 17. BIOS

18. OS 171. Interrupt interface parameters

19. Storage

Detailed ways

In order to make the above and other objects, features and advantages of the present invention more comprehensible, preferred embodiments are enumerated below and described in detail with reference to the accompanying drawings.

Please refer to FIG. 1 , the present invention discloses a dust removal device 1 that can be used by a computer device (not shown). Since the focus of the present invention is not on the modeling structure of the dust removal device 1 or the computer equipment, the three-dimensional view of the dust removal device 1 or the computer equipment is not shown, but only its system block diagram is shown. The computer device referred to herein may be a notebook computer, a desktop computer, a server, or the like. The dust removal device 1 includes a cooling fan 11 , a controller 13 and a detection device 14 , preferably also includes a timer 12 . In one embodiment, the dust removal device 1 may further include an operating system (OS) 18 and a computer basic input output system (BIOS) 17, which will be described in detail below.

Please refer to Fig. 1 and Fig. 2 at the same time, the cooling fan 11 can rotate forward and reversely, and when it rotates forwardly, the cold air outside the computer equipment can be sucked in to cool down the electronic parts 15 in the computer equipment; At this time, the dust can be brought out in the opposite direction to achieve the effect of dust removal.

Controller 13 (such as KBC or the like) is electrically connected with cooling fan 11 and a detection device 14, and detection device 14 can detect the temperature of an electronic part 15 and/or can detect the rotating speed of cooling fan 11, wherein electronic part 15 can be Processor (such as CPU or similar), memory, north bridge crystal, hard disk, or VGA display card or other similar.

The timer 12 is electrically connected with the controller 13 . The firmware 16 stored in the controller 13 judges whether the temperature of the electronic part 15 is higher than a specific temperature. When the temperature of the electronic part 15 is higher than a specific temperature, the cooling fan 11 can be reversed until the timer 12 (such as Real Time Counter, Oscillator, or the like) to a specific time. Or, in another embodiment, the firmware 16 stored in the controller 13 judges whether the speed of the cooling fan 11 is lower than a specific speed, and when the speed of the cooling fan 11 is lower than a specific speed, the cooling fan 11 can be activated. Invert until the timer 12 reaches the specified time.

For different electronic parts 15, the designer can set different specific temperature and specific time as the judgment basis of the firmware 16. Preferably, for example, the specific temperature is set at 60° C. to 100° C., and the specific time is less than 10 seconds. For example, the designer can set that when the temperature of the electronic component 15 is higher than 60° C., the cooling fan 11 will be reversed until the timer 12 counts to 5 seconds before stopping. Or for example, when the rotation speed of the cooling fan 11 is lower than 3000 revolutions per second (RPM), the cooling fan 11 is reversed until the timer 12 counts to 5 seconds before stopping.

In one embodiment of the present invention, the operation of dust removal utilizes computer equipment to operate when it is ready to enter the shutdown state, so the dust removal device 1 can further include a computer basic input output system (BIOS) 17 and an operating system (OS) 18 , BIOS 17 can define an interrupt interface parameter 171 . When the user turns off the machine, the OS 18 first executes and sends a shutdown command, and then the computer program can be used to receive the shutdown command and call the interrupt interface parameter 171 to prepare for shutdown.

In order to facilitate technicians to identify the operation of the dust removal device 1 , the present invention may also include a memory 19 for storing a reverse rotation data of the cooling fan 11 . The reverse data may include rotational speed data of the cooling fan 11 , temperature data of the electronic component 15 or time data of the timer 12 . This memory 19 can be a CMOS, an EEPROM, a BIOS Flash ROM, a TPM, or other similar. In this way, technicians can learn from these reversal data when the cooling fan 11 reverses, how much the rotation speed is, the cooling effect of the reversal on the electronic parts 15, etc., so as to adjust and set the above-mentioned specific parameters. temperature and/or a specific time.

As those skilled in the art understand, the heat dissipation fan 11 of the dust removal device 1 of the present invention can be determined to rotate forward or reverse according to the input positive voltage or negative voltage, and can be controlled by controlling the magnitude of the voltage The speed of the cooling fan 11. Therefore, the forward rotation, reverse rotation, or control of the rotational speed of the cooling fan 11 will not be described in detail.

In addition, the present invention discloses a method for removing dust by using cooling fan 11, please refer to FIG. 3A and FIG. Cooling fan to achieve the purpose of eliminating dust.

After the flow of the method starts, proceed to step S311: determine whether the temperature of the electronic component 15 is higher than a specific temperature. The electronic component 15 can be a processor, memory, a north bridge crystal, a hard disk, or a VGA display card. As described above, the temperature of the electronic component 15 can be detected by the detection device 14 . If it is judged as "yes", go to step S312: reverse the cooling fan 11 . As mentioned above, the specific temperature can be set between 60°C and 100°C. If the determination in step S311 is "No", it means that the amount of dust may not be much at this time, and then the process ends.

In one embodiment, in order to more accurately determine whether the amount of dust is really large enough to be removed, the present invention can add an additional determination step, as shown in Figure 3B, step S311 is determined to be "yes", then proceed to step S322: It is judged whether the rotation speed of the cooling fan 11 is lower than a specific rotation speed. If the determination in step S322 is "Yes", then proceed to step S312, otherwise, the process ends. As mentioned above, the specific rotational speed may be set at 3000 to 5000 revolutions per second (RPM).

Alternatively, as shown in FIG. 4A and FIG. 4B , the present invention can also determine whether the rotation speed of the cooling fan 11 is lower than a specific rotation speed (step S411 ), as a basis for whether the cooling fan 11 should reverse (step S412 ). Alternatively, it may be firstly determined whether the rotation speed of the cooling fan 11 is lower than a specified rotation speed (step S411 ), if yes, then it is determined again whether the electronic component 15 is higher than a specified temperature (step S422 ).

In order to avoid too frequent operation (including forward rotation and reverse rotation) of the cooling fan 11, the present invention can utilize the computer equipment to execute the dust removal operation when it is ready to enter the shutdown state. Please refer to FIG. 5A . In the embodiment of FIG. 5A , when the shutdown operation is used, it is determined whether to perform the dust removal operation. After the user presses shutdown, the operating system 18 sends a shutdown command, and the computer program receives the shutdown command and calls the interrupt interface parameter 171 of the BIOS 17 (steps S51 and S52) to prepare for shutdown.

The subsequent determining step S531 and the step S54 of inverting the cooling fan 11 are similar to the above steps S311 and S312 in FIG. 3A , and thus will not be repeated here. Preferably, when step S54 is executed, the detection device 14 can still continuously detect the temperature of the electronic component 15, and the firmware 16 stored in the controller 13 judges again whether the electronic component 15 is higher than a specific temperature (step S551), if If the judgment is "No", it means that the temperature of the electronic component 15 has dropped, and it is not necessary to remove the dust, so the reverse rotation of the cooling fan 11 can be stopped (step S560).

After the cooling fan 11 stops reversing, preferably, step S56 is further performed to read the reversing data of the cooling fan, and step S57 is to write the reversing data into the memory 19 . As mentioned above, the reversal data includes the rotational speed data of the cooling fan 11, the temperature data of the electronic components 15 or a time data of the timer 12, for the technical personnel to interpret and determine the specific temperature, specific time and/or specific rotational speed. set up. Ends when done (e.g. shutdown).

In the embodiment of FIG. 5A, the judgment of whether to make the cooling fan 11 reverse is based on the temperature of the electronic component 15 (step S531). temperature (step S551). Please refer to FIG. 5B, whether to make the judgment of cooling fan 11 reverse rotation can also be based on the rotating speed of cooling fan 11 (step S532), in a better situation, when cooling fan 11 is reversed, then repeatedly judge the temperature of electronic component 15 (step S552). Although the judgment shown in FIG. 5A and FIG. 5B determines to start the reverse rotation of the cooling fan 11 as described above, or the step S551 of FIG. It is also changed to judge the rotation speed of the cooling fan 11 (not shown).

In addition to performing the reverse operation of the cooling fan 11 when the machine is turned off (as shown in the embodiment shown in FIG. 5A and FIG. 5B ), the present invention can also utilize the reverse rotation of the cooling fan 11 to remove dust when the electronic parts 15 are running idle. Please refer to FIG. 6A , step S61 first determines whether the electronic component 15 is in an idle state, for example, can detect the C2 or C3 register (register) of Nanqiao crystal to determine whether the electronic component 15 is in an idle state. If it is judged as "yes", go to step S621, otherwise, end the process, for example, return to the runtime state. Steps S621 , S63 , S641 , and S65 in FIG. 6A are similar to steps S531 , S54 , S551 , and S560 in FIG. 5A , and their contents have been described in detail above, so they will not be repeated here.

The only difference between FIG. 6B and FIG. 6A is that the reverse rotation of the cooling fan 11 is firstly based on the rotation speed of the cooling fan 11 (step S622 in FIG. 6B ). Therefore, steps S622 , S63 , S642 and S65 in FIG. 6B are also similar to steps S532 , S54 , S552 and S560 in FIG. 5B , and their contents have been described in detail above, so they will not be repeated here.

In summary, the focus of the present invention is to determine the possibility of dust deposition. For example, when the amount of dust is too much, it may cause the temperature of the electronic parts 15 to rise (making the heat dissipation fan 11 rotate forward and the heat dissipation effect is not good) and may cause the speed of the heat dissipation fan 11 to increase. Therefore, the temperature of the electronic components 15 and/or the speed of the cooling fan 11 can be determined to determine whether to start the reverse rotation of the cooling fan 11 to discharge the dust. Due to the specific temperature, specific time (reverse time length of cooling fan 11), and specific rotating speed can be set different values by technicians according to different needs, so judging the temperature of electronic parts 15 and/or judging the rotating speed of cooling fan 11 is not limited. It depends on which one is judged first, which one is judged later, or whether the judgment is strictly interleaved (for example, as shown in FIG. 4B or FIG. 3B ).

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Those skilled in the art can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of protection is based on the claims of the present invention.

Claims (45)

1, a kind of method of utilizing a radiator fan dedusting comprises:

Whether the temperature of judging an electronic component is higher than a specified temp; And

If be judged as "Yes", then make this radiator fan counter-rotating reach a special time up to a timer.

2, the method for claim 1, wherein this electronic component is a processor, an internal memory, a north bridge crystal, a hard disk or a VGA display card.

3, the method for claim 1, wherein this radiator fan can be the radiator fan of a mobile computer, the radiator fan of a desktop PC or the radiator fan of a server.

4, the method for claim 1, this radiator fan counter-rotating reaches the step of this special time up to this timer, further comprise repeating step: whether the temperature of judging this electronic component is higher than this specified temp, if be judged as "No", then stops the counter-rotating of this radiator fan.

5, the method for claim 1, this radiator fan counter-rotating reaches the step of this special time up to this timer, further comprise step: whether the rotating speed of judging this radiator fan is lower than a specific rotation speeds, if be judged as "No", then stops the counter-rotating of this radiator fan.

Whether 6, the method for claim 1 is higher than in the temperature of judging this electronic component before the step of this specified temp, further comprises step:

Receive a shutdown command; And

Call out an interrupt interface parameter, this interrupt interface parameter is defined within a basic input output system of computer.

7, method as claimed in claim 5 after this timer reaches the step of this special time, further comprises step in this radiator fan counter-rotating:

Read a reversal data of this radiator fan; And

This reversal data of this radiator fan is write a reservoir.

8, method as claimed in claim 7, wherein this reversal data comprises a rotary speed data of this radiator fan, a temperature data of this electronic component or time data of this timer.

9, method as claimed in claim 7, wherein this reservoir can be a CMOS, an EEPROM, a BIOS Flash ROM or a TPM.

10, the method for claim 1 before whether the temperature of judging this electronic component is higher than this specified temp, further comprises step:

Judge whether this electronic component is in | idle state;

If be judged as "Yes", judge then whether the temperature of this electronic component is higher than the step of this specified temp.

11, the method for claim 1, wherein this specified temp is between 60 ℃ to 100 ℃.

12, the method for claim 1, wherein this special time was less than 10 seconds.

13, method as claimed in claim 5, wherein this specific rotation speeds is changeed between per second 3000 to 5000.

14, a kind of method of utilizing a radiator fan dedusting comprises:

Whether the rotating speed of judging this radiator fan is lower than a specific rotation speeds, and

If be judged as "Yes", then make this radiator fan counter-rotating reach a special time up to a timer.

15, method as claimed in claim 14, this radiator fan counter-rotating reaches the step of this special time up to this timer, further comprise step: whether the temperature of judging an electronic component is higher than a specified temp, if be judged as "No", then stops the counter-rotating of this radiator fan.

16, method as claimed in claim 15, wherein this electronic component is a processor, an internal memory, a north bridge crystal, a hard disk or a VGA display card.

17, method as claimed in claim 14, wherein this radiator fan can be the radiator fan of a mobile computer, the radiator fan of a desktop PC or the radiator fan of a server.

18, method as claimed in claim 14, this radiator fan counter-rotating reaches the step of this special time up to this timer, further comprise repeating step: whether the rotating speed of judging this radiator fan is lower than this specific rotation speeds, if be judged as "No", then stops the counter-rotating of this radiator fan.

19, method as claimed in claim 14 whether before the step greater than this specific rotation speeds, further comprises step at the rotating speed of judging this radiator fan:

Receive a shutdown command; And

Call out an interrupt interface parameter, this interrupt interface parameter is defined within a basic input output system of computer.

20, method as claimed in claim 15 after this timer reaches the step of this special time, further comprises step in this radiator fan counter-rotating:

Read a reversal data of this radiator fan; And

This reversal data of this radiator fan is write a reservoir.

21, method as claimed in claim 20, wherein this reversal data comprises a rotary speed data of this radiator fan, a temperature data of this electronic component or time data of this timer.

22, method as claimed in claim 20, wherein this reservoir can be a CMOS, an EEPROM, a BIOS Flash ROM or a TPM.

23, method as claimed in claim 14 before whether the rotating speed of judging this radiator fan is lower than specific rotation speeds, further comprises step:

Judge whether an electronic component is in | idle state (idle);

If be judged as "Yes", judge then whether the rotating speed of this radiator fan is lower than the step of this specific rotation speeds.

24, method as claimed in claim 15, wherein this specified temp is between 60 ℃ to 100 ℃.

25, method as claimed in claim 14, wherein this special time was less than 10 seconds.

26, method as claimed in claim 14, wherein this specific rotation speeds is changeed between per second 3000 to 5000.

27, a kind of dust arrester for computer equipment use, it comprises:

One radiator fan, but these radiator fan forward and reverse;

One controller is electrical connected with this radiator fan;

One pick-up unit is electrical connected with this controller, in order to detect the temperature of an electronic component; And

One firmware is stored in this controller, uses the following mechanism that realizes:

Whether the temperature of judging this electronic component is higher than a specified temp; And

If be judged as "Yes", then make this radiator fan counter-rotating.

28, dust arrester as claimed in claim 27 further comprises a timer, and this timer and this controller are electrical connected, and the counter-rotating of this radiator fan reaches a special time up to this timer.

29, dust arrester as claimed in claim 27, wherein this electronic component is a processor, an internal memory, a north bridge crystal, a hard disk or a VGA display card.

30, dust arrester as claimed in claim 27, wherein this computer equipment can be a mobile computer, a desktop PC or a server.

31, dust arrester as claimed in claim 27, further comprise a basic input output system of computer and an operating system, this basic input output system of computer definable one interrupt interface parameter, before execution judges whether the temperature of this electronic component is higher than this specified temp, further carry out earlier by this:

Receive a shutdown command, this shutdown command is sent by this operating system; And

Call out this interrupt interface parameter.

32, dust arrester as claimed in claim 28 further comprises a reservoir, in order to store a reversal data of this radiator fan, is carrying out this radiator fan counter-rotating after this timer reaches this special time, further carries out:

Read the reversal data of this radiator fan; And

The reversal data of this radiator fan is write this reservoir.

33, dust arrester as claimed in claim 32, wherein this reversal data comprises time data of a temperature data or this timer of this electronic component.

34, dust arrester as claimed in claim 32, wherein this reservoir can be a CMOS, an EEPROM, a BIOS Flash ROM or a TPM.

35, dust arrester as claimed in claim 27, wherein this specified temp is between 60 ℃ to 100 ℃.

36, dust arrester as claimed in claim 28, wherein this special time was less than 10 seconds.

37, a kind of dust arrester for computer equipment use, it comprises:

One radiator fan, but these radiator fan forward and reverse;

One controller is electrical connected with this radiator fan;

One pick-up unit is electrical connected with this controller, in order to detect the rotating speed of this radiator fan; And

One firmware is stored in this controller, uses the following mechanism of reaching:

Whether the rotating speed of judging this radiator fan is lower than a specific rotation speeds; And

If be judged as "Yes", then make this radiator fan counter-rotating.

38, dust arrester as claimed in claim 37 further comprises a timer, and this timer and this controller are electrical connected, and the counter-rotating of this radiator fan reaches a special time up to this timer.

39, dust arrester as claimed in claim 37, wherein this computer equipment can be a mobile computer, a desktop PC or a server.

40, dust arrester as claimed in claim 37, further comprise a basic input output system of computer and an operating system, this basic input output system of computer definable one interrupt interface parameter, before execution judges whether the rotating speed of this radiator fan is lower than this specific rotation speeds, further carry out earlier by this:

Receive a shutdown command, this shutdown command is sent by this operating system; And

Call out this interrupt interface parameter.

41, dust arrester as claimed in claim 38 further comprises a reservoir, in order to store a reversal data of this radiator fan, is carrying out this radiator fan counter-rotating after this timer reaches this special time, further carries out:

Read the reversal data of this radiator fan; And

The reversal data of this radiator fan is write this reservoir.

42, dust arrester as claimed in claim 41, wherein this reversal data comprises time data of a rotary speed data or this timer of this radiator fan.

43, dust arrester as claimed in claim 41, wherein this reservoir can be a CMOS, an EEPROM, a BIOS Flash ROM or a TPM.。

44, dust arrester as claimed in claim 38, wherein this special time was less than 10 seconds.

45, dust arrester as claimed in claim 37, wherein this specific rotation speeds is changeed between per second 3000 to 5000.

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