CN101908013A - Pressure sensing device, pressure sensing method and heat dissipation device for electronic device - Google Patents
Pressure sensing device, pressure sensing method and heat dissipation device for electronic device Download PDFInfo
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- CN101908013A CN101908013A CN2009101439570A CN200910143957A CN101908013A CN 101908013 A CN101908013 A CN 101908013A CN 2009101439570 A CN2009101439570 A CN 2009101439570A CN 200910143957 A CN200910143957 A CN 200910143957A CN 101908013 A CN101908013 A CN 101908013A
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Abstract
The invention relates to a pressure sensing device, a pressure sensing method and a heat dissipation device for an electronic device. The pressure sensing device for the electronic device comprises a pressure sensing unit, a control unit and a warning unit, wherein the pressure sensing unit is arranged in the electronic device for detecting fluid pressure in the electronic device to generate a pressure signal; the control unit is coupled to the pressure sensing unit for judging the variation condition of the fluid pressure in the electronic device and generating a control signal according to the pressure signal; and the warning unit is coupled to the control unit for outputting a warning signal to execute a warning function according to the control signal. The pressure sensing device, the pressure sensing method and the heat dissipation device can effectively improve the heat dissipation efficiency of the electronic device, enhance the working stability of the electronic device better and prolong the service life of internal components in the electronic device. The atmospheric pressure value of the service environment can also be detected through the pressure sensing unit, and the optimal working efficiency of the electronic device can be brought into play by timely executing a proper heat dissipation procedure.
Description
Technical field
The present invention relates to a kind of pressure-sensing device and pressure-sensing method and heat abstractor that is used for an electronic installation, relate in particular to a kind of pressure-sensing device and pressure-sensing method and the heat abstractor that can notify unusual condition immediately.
Background technology
Along with the development of Information technology, human lives and computer system are closely interdependent, no matter people's telecommuting all generally and thick and fast uses computer system.And, because no matter the progress of computing machine science and technology is computer systems such as notebook computer, desktop PC or server, except the frequency of operation of processor is more and more higher, the more and more polynary especially change of the function of each assembly and powerful.Therefore, when computer system in when work, the heat energy of being supervened also relatively increases.In case the heat energy that is produced can't effectively be got rid of, not only can have influence on the functional operation of computer system and arithmetic speed and cause system to work as machine, more may cause intraware overheated and the damage situation, therefore, the quality of heat dissipation has critical influence to the general performance of computer system.
In general, in the present various computer systems all design have perfect heat abstractor to solve heat dissipation problem, yet, in the use still can because of dust accumulation or environment for use causes the heat abstractor can't operate as normal improperly, and produce superheating phenomenon.For instance, usually can be provided with various louvre at shell the circulation of air turnover is provided, after long-time use, on louvre, can hoard dust and influence air and pass in and out the efficient, the dust or the pollutant that enter computer-internal along with air flow also can accumulate in heat abstractor and the intraware, and cause heat dissipation to reduce.In the case,, still can only negatively slow down dust accumulation speed, therefore, in order to make the work that computer system can be stable, to a certain degree the time, dust must be removed, in order to the heat radiation operation in dust accumulation although specially designed dust guard is arranged.In addition, when computer system is in unsuitable environment for use, for example notebook computer is placed on the carpet and block louvre or too close wall and influence circulation of air of louvre or the like, all can influence the work of heat abstractor and reduce heat dissipation.
On the other hand, the user regular meeting device that under different environment, uses a computer.For instance, when the user is in the high altitude localities, because rarefaction of air and atmospheric density are less relatively, the gas flow that the fan of heat abstractor is produced under same rotational speed is also relatively low, thus, will cause the reduction of radiating efficiency, and influence the computer system operate as normal.Yet the design of computer system at present also can't in time be made suitable adjustment along with the change of user's operating environment, makes the best task performance of system's performance.
Summary of the invention
Therefore, the present invention mainly is to provide a kind of pressure-sensing device and pressure-sensing method and heat abstractor that is used for an electronic installation.
The present invention discloses a kind of pressure-sensing device that is used for an electronic installation, includes a pressure-sensing unit, is arranged in this electronic installation, is used for detecting the hydrodynamic pressure in this electronic installation, to produce a pressure signal; One control module is coupled to this pressure-sensing unit, is used for judging the situation of change of the hydrodynamic pressure in this electronic installation according to this pressure signal, and produces a control signal; And one the caution unit, be coupled to this control module, be used for exporting an alarm signal, to carry out an alarm function according to this control signal.
The present invention also discloses a kind of pressure-sensing method that is used for an electronic installation, includes the hydrodynamic pressure that detects in this electronic installation, to produce a pressure signal; According to this pressure signal, judge the situation of change of the hydrodynamic pressure in this electronic installation, and produce a control signal; And, export an alarm signal according to this control signal, to carry out an alarm function.
The present invention discloses a kind of heat abstractor that is used for an electronic installation in addition, includes a radiating module, is located in this electronic installation, is used for producing air flow by a fan, removes heat energy to loose; One pressure-sensing unit is used for detecting the atmospheric pressure value of this electronic installation environment for use of living in, to produce a pressure signal; And a control module, be coupled to this pressure-sensing unit and this radiating module, be used for judging the situation of change of the atmospheric pressure in this electronic installation, and produce a speed controling signal, to control the rotating speed of this fan according to this pressure signal.
The present invention also discloses a kind of pressure-sensing method that is used for an electronic installation, includes the atmospheric pressure value that detects this electronic installation environment for use of living in, to produce a pressure signal; And, judge the situation of change of the atmospheric pressure in this electronic installation according to this pressure signal, and produce a speed controling signal, with the rotating speed of a fan of controlling this electronic installation.
The present invention can detect laying dust and abnormal conditions immediately in conjunction with the pressure-sensing mode, to notify the user to get rid of, except can effectively promoting the electronic installation heat dissipation, more strengthened the stable and serviceable life that prolongs the electronic installation intraware of electronic installation work.In addition, the present invention can detect the atmospheric pressure value of environment for use by the pressure-sensing unit, and makes suitable adjustment according to this, with the suitable heat radiation program of instant execution, makes the best task performance of electronic installation performance.
Description of drawings
Fig. 1 is the synoptic diagram of a pressure-sensing device that is used for an electronic installation of the embodiment of the invention.
Fig. 2 is the synoptic diagram of a pressure-sensing flow process of the embodiment of the invention.
Fig. 3 is the synoptic diagram of a heat abstractor of a notebook computer of the embodiment of the invention.
Fig. 4 is the schematic appearance of a louvre of a notebook computer.
Fig. 5 is the synoptic diagram of a heat abstractor that is used for an electronic installation of the embodiment of the invention.
Fig. 6 is the synoptic diagram of a pressure-sensing flow process of the embodiment of the invention.
The primary clustering symbol description:
10 pressure-sensing devices, 308,514 intrawares
102,502 pressure- sensing unit 300A, 300B, 300C direction
104,504 control module 304A air intake openings
106 caution unit 304B exhausr ports
20,60 flow process 306A air intake vents
200,202,204,206,306B air outlet
208,602,604,606 step 402 louvres
30,50 heat abstractors, 506 radiating modules
31 notebook computer S
AlarmAlarm signal
302 heat pipe S
CControl signal
304 radiating fin S
PPressure signal
306,512 fan S
SPEEDSpeed controling signal
Embodiment
Please refer to Fig. 1, Fig. 1 is the synoptic diagram of a pressure-sensing device 10 that is used for an electronic installation of the embodiment of the invention.Electronic installation can be a notebook computer, a desktop PC or a server etc., but not as limit.Pressure-sensing device 10 includes a pressure-sensing unit 102, a control module 104 and a caution unit 106.Pressure-sensing unit 102 is arranged in the electronic installation, is used for the hydrodynamic pressure of detection. electronics inside, to produce a pressure signal S
PControl module 104 is coupled to pressure-sensing unit 102, is used for according to pressure signal S
P, judge the situation of change of the hydrodynamic pressure of electronic installation inside, and produce a control signal S
CCaution unit 106 is coupled to control module 104, is used for according to control signal S
C, export an alarm signal S
Alarm, to carry out an alarm function.
Working method about pressure-sensing device 10 please refer to Fig. 2.Fig. 2 is the synoptic diagram of a pressure-sensing flow process 20 of the embodiment of the invention.Pressure-sensing flow process 20 comprises following steps:
Step 200: beginning.
Step 202: the hydrodynamic pressure in the detection. electronics, to produce pressure signal S
P
Step 204: according to pressure signal S
P, judge the situation of change of the hydrodynamic pressure in the electronic installation, and produce control signal S
C
Step 206: according to control signal S
C, output alarm signal S
Alarm, to carry out alarm function.
Step 208: finish.
According to flow process 20, the hydrodynamic pressure in pressure-sensing device 10 detection. electronics, for example the pressure that air flow produced with the situation of air flow in the judgement electronic installation, and then produces alarm signal S
P, notify the user about laying dust situation in the electronic installation or environment for use state.In other words, when the laying dust situation in the electronic installation or when at present the environment for use state is enough to influence the work of heat radiation program, pressure-sensing device 10 can detect unusual condition immediately, and informs that the user further carries out the relevant action of getting rid of.
In brief, the present invention judges the situation of air flow, and then takes measures on customs clearance by the hydrodynamic pressure in the detection. electronics, avoids influencing the operation of electronic installation.The device that when work can heat production, equipment etc. are noted that electronic installation is not limited to any kind of, so long as all can be used notion of the present invention.For instance, please refer to Fig. 3 and Fig. 4, Fig. 3 is the synoptic diagram of a heat abstractor 30 of a notebook computer 31 of the embodiment of the invention, and Fig. 4 is the schematic appearance of a louvre 402 of notebook computer 31.In general, because notebook computer 31 inner spaces are limited, each intraware (for example central processing unit, chip or other electronic packages etc.) is being arranged in together very closely usually, after Once you begin working, the heat energy that is produced just promptly begins accumulation, so can design the heat energy that is produced when having heat abstractor 30 that the internal electrical components of notebook computer 31 is worked in the notebook computer 31, discharge by louvre 40 as shown in Figure 4.In Fig. 3, heat abstractor 30 includes a heat pipe (Heatpipe) 302, a radiating fin 304 and a fan 306.Heat pipe 302 is connected in an intraware 308 of notebook computer 31, and by adopting heat pipes for heat transfer principle (passing to the low temperature place from the high temperature place), the thermal energy transfer that is produced during with intraware 308 work is to radiating fin 304.Radiating fin 304 is connected in the other end of heat pipe 302, is used for loose removing the heat energy that heat pipe 302 is transmitted.Fan 306 is arranged at a side of radiating fin 304, is used for air is blowed to radiating fin 304, removes the heat energy on the radiating fin 304 to loose.Specifically, fan 306 in the heat abstractor 30 can suck the direction of air along arrow 300A from an air intake vent 306A place, and blows out the air duct that the gap between arranging to each fin of radiating fin 304 forms by an air outlet 306B of correspondence along the direction of arrow 300B.As shown in Figure 3, air blows into an air intake opening 304A of radiating fin 304 by air outlet 306B, and is discharged along arrow 300C direction by exhausr port 304B.When air (flow to exhausr port 304B during) in the air duct of radiating fin 304, can carry out heat interchange and absorb heat energy with radiating fin 304 by air intake opening 304A.Hot-air after the heat absorption is flowed out by exhausr port 304B, just can put up with the heat energy that is produced in the time of intraware 308 being worked and discharge, to reach the purpose of heat radiation.In the case, the present invention can place notebook computer 31 inside Anywhere with pressure-sensing unit 102, detects the pressure that air flow causes.
For instance, pressure-sensing unit 102 can be placed (for example P1 place of Fig. 3) between the air outlet 306B side and radiating fin 304 of fan 306 or place the exhausr port 304B (for example P2 place of Fig. 3) of radiating fin 304, detect the hydrodynamic pressure that air flow caused that fan 306 is driven.In addition, pressure-sensing unit 102 also can place the outside (for example P1 place of Fig. 4) of louvre 402 or inboard (not being plotted in Fig. 4) to detect.Because dust or pollutant flow via air, can build up in louvre 402, fan 306, radiating fin 304, intraware 308 etc., after accumulating for a long time, the blade of fan 306 can make rotating speed slack-off because of too much dust accumulation, and then influence radiating efficiency, 304 of louvre 402 and radiating fins can block flowing of air because of laying dust, and the air flow amount that relatively influences fan and driven.Thus, will slow down gas flow ability in the notebook computer 31, similarly, pressure-sensing unit 102 detected pressure signal S
PValue also with reduce.Therefore, placing the P2 place of Fig. 3 with pressure-sensing unit 102 is example, as pressure signal S
PSize (wind pressure value that fan 306 is blown out) less than a first threshold TH
1The time, caution unit 106 can be according to control signal S
COutput alarm signal S
Alarm, carry out the dedusting program to notify the user.Wherein, first threshold TH
1It can be a preset pressure value.In addition, because louvre 402 might make pressure signal S because of the factor pressure (for example being clogged by carpet) of environment for use
PMoment diminishes, also by warning unit 106 output alarm signal S
Alarm, notify the user to carry out the environment for use trace routine, whether for example inspect and keep unimpeded arround the louvre 402.Preferably, caution unit 106 can be in control signal indicated pressure signal S
PDuring less than first threshold TH, output alarm signal S
AlarmTo a processing unit (as central processing unit) of notebook computer 31, and, carry out ejection (pop-up) window function and notify the user to carry out dedusting program or execution environment for use trace routine by its operating system.
Therefore, the present invention can detect laying dust and abnormal conditions immediately in conjunction with the pressure-sensing mode of pressure-sensing device 10, to notify the user to get rid of, thus, can effectively promote notebook computer 31 heat dissipations, further, more strengthen the stable and serviceable life that prolongs intraware of notebook computer 31 work.
It should be noted that in notebook computer 31 intraware 308 can be a central processing unit, a chip or other electronic packages, and is not limited thereto.In addition, any device that can test fluid pressure all can be used to realize pressure-sensing unit 102, and the test fluid force value is come in any position that pressure-sensing unit 102 can be arranged at notebook computer 31 inside.And the quantity of louvre 402 and profile are regardless of, as long as can be as the air turnover, viewing system designs and decides.Caution unit 106 can be a loudspeaker, a light emitting diode or a vibrations unit etc., is used at control signal indicated pressure signal S
PLess than first threshold TH
1The time, send specific sound, cresset or vibrations and inform the user.
On the other hand, the user may use electronic installation in various operating environment.The present invention is directed to different operating environments, can adjust suitable heat sinking function.Please refer to Fig. 5, Fig. 5 is the synoptic diagram of a heat abstractor 50 that is used for an electronic installation of the embodiment of the invention.Electronic installation can be a notebook computer, a desktop PC or a server etc., but not as limit.Heat abstractor 50 includes a pressure-sensing unit 502, a control module 504 and a radiating module 506.Pressure-sensing unit 502 is used for the atmospheric pressure value of the present environment for use of living in of detection. electronics, to produce a pressure signal S
PControl module 504 is coupled to pressure-sensing unit 502, is used for according to pressure signal S
P, judge the situation of change of the atmospheric pressure of electronic installation present position, and produce a speed controling signal S
SPEED, with a fan 512 rotating speeds of control radiating module 506.Certainly, except fan 512, radiating module 506 also can include common radiating subassemblies such as heat pipe, radiating fin, and its set-up mode can not given unnecessary details at this with reference to figure 3.In pressure-sensing device 50, as the measured pressure signal S in pressure-sensing unit 502
PLess than one second threshold value TH
2The time, control module 504 can produce speed controling signal S
SPEED, with the rotating speed of control raising fan 512.Wherein, the second threshold value TH
2It can be a default atmospheric pressure value (a for example atmospheric pressure (1atm)).Similarly, the 502 measured pressure signal S in the pressure-sensing unit
PGreater than the second threshold value TH
2The time, control module 504 can produce speed controling signal S
SPEED, with the rotating speed of control reduction fan 512.In addition, pressure-sensing unit 502 can be any device that can detect atmospheric pressure, for instance, can be a HCE pressure sensor.
Therefore, the present invention can detect the atmospheric pressure value of environment for use by the pressure-sensing unit, and makes suitable adjustment according to this, carries out suitable heat radiation program immediately, makes the best task performance of electronic installation performance.
Working method about pressure-sensing device 50 please refer to Fig. 6.Fig. 6 is used for the synoptic diagram of a pressure-sensing flow process 60 for the embodiment of the invention.Pressure-sensing flow process 60 comprises following steps:
Step 600: beginning.
Step 602: the atmospheric pressure of detection. electronics environment for use of living in, to produce a pressure signal S
P
Step 604: according to pressure signal S
P, judge the situation of change of the atmospheric pressure in the electronic installation, and produce a speed controling signal S
SPEED, with the rotating speed of control fan 512.
Step 606: finish.
Pressure-sensing flow process 60 is in order to the working method of explanation pressure-sensing device, and detailed description and associated change can not given unnecessary details at this with reference to above stated specification.
In brief, the present invention is the environment atmospheric pressure value by detection. electronics, judges the atmospheric density situation, and then takes measures on customs clearance, and makes the best task performance of electronic installation performance.The electronic installation that when work can heat production, equipment etc. are noted that electronic installation is not limited to any kind of, so long as all can be used notion of the present invention.With the notebook computer is example, after the present invention can detect the atmospheric pressure value of the present environment for use of living in of notebook computer by pressure-sensing unit 502, with pressure signal S
PValue provides control module 504, to judge the situation of present environment for use.In this case, control module 504 can be one of notebook computer embed controller (Embedded Controller, EC) or a keyboard controller (Keyboard controller, KBC), therefore, when control module 504 receives pressure signal S
PAfter the value, can be with pressure signal S
PA value and a default look-up table are compared, for example as pressure signal S
PDuring less than an atmospheric pressure, control module 504 can trigger a processing unit (as central processing unit) of notebook computer, makes this processing unit improve the rotating speed of fan 512, and vice versa.Thus, notebook computer can adjust best radiating efficiency, so that the stable execution function of notebook computer immediately according to the variation of environment for use.Under comparing, in known technology, when the user is in the high altitude localities, because rarefaction of air and atmospheric density are less relatively, the gas flow that the fan of heat abstractor is produced under same rotational speed is also relatively low, thereby will cause the reduction of radiating efficiency, and influence the computer system operate as normal.
In sum, the present invention can detect laying dust and abnormal conditions immediately in conjunction with the pressure-sensing mode, to notify the user to get rid of,, more strengthened the stable and serviceable life that prolongs the electronic installation intraware of electronic installation work except can effectively promoting the electronic installation heat dissipation.In addition, the present invention can detect the atmospheric pressure value of environment for use by the pressure-sensing unit, and makes suitable adjustment according to this, with the suitable heat radiation program of instant execution, makes the best task performance of electronic installation performance.
The above only is preferred embodiment of the present invention, and all equivalent variations and modifications of being done according to claims scope of the present invention all should belong to covering scope of the present invention.
Claims (29)
1. pressure-sensing device that is used for an electronic installation comprises:
One pressure-sensing unit is arranged in the described electronic installation, is used for detecting the hydrodynamic pressure in the described electronic installation, to produce a pressure signal;
One control module is coupled to described pressure-sensing unit, is used for judging the situation of change of the hydrodynamic pressure in the described electronic installation according to described pressure signal, and produces a control signal; And
One caution unit is coupled to described control module, is used for exporting an alarm signal according to described control signal, to carry out an alarm function.
2. pressure-sensing device as claimed in claim 1, wherein said pressure-sensing unit is arranged at the outside of a louvre of described electronic installation.
3. pressure-sensing device as claimed in claim 1, wherein said pressure-sensing unit is arranged at the inboard of a louvre of described electronic installation.
4. pressure-sensing device as claimed in claim 1 also comprises:
One heat pipe, described heat pipe one end is connected in an intraware of described electronic installation;
A plurality of radiating fins are connected in the other end of described heat pipe, are used for loosing removing the heat energy that described heat pipe transmitted; And
One fan is arranged at a side of described a plurality of radiating fins, is used for air is blowed to described a plurality of radiating fin, removes the heat energy on described a plurality of radiating fins to loose.
5. pressure-sensing device as claimed in claim 4, wherein said pressure-sensing unit are arranged between described fan and the described a plurality of radiating fin, to detect the hydrodynamic pressure that described fan is produced.
6. pressure-sensing device as claimed in claim 4, wherein said pressure-sensing unit are arranged between described a plurality of radiating fin, to detect the hydrodynamic pressure that described fan is produced.
7. when pressure-sensing device as claimed in claim 1, wherein said caution unit are indicated described pressure signal less than a first threshold in described control signal, export described alarm signal, carry out a dedusting program to notify a user.
8. pressure-sensing device as claimed in claim 1, wherein said caution unit during less than a first threshold, is exported described alarm signal at described control signal indicated pressure signal, carries out an environment for use trace routine to notify a user.
9. pressure-sensing device as claimed in claim 1, wherein said electronic installation are a computer system.
10. pressure-sensing device as claimed in claim 9, wherein said caution unit is at described control signal indicated pressure signal during less than a first threshold, export the processing unit of described alarm signal to described computer system, with a operating system by described computer system, carry out a pop-up window, notify the user to carry out dedusting program or environment for use trace routine.
11. pressure-sensing device as claimed in claim 1, wherein said caution unit is a loudspeaker.
12. pressure-sensing device as claimed in claim 11, wherein said alarm signal are a sound.
13. pressure-sensing device as claimed in claim 1, wherein said caution unit are a vibrations unit.
14. a pressure-sensing method that is used for an electronic installation comprises:
Detect the hydrodynamic pressure in the described electronic installation, to produce a pressure signal;
According to described pressure signal, judge the situation of change of the hydrodynamic pressure in the described electronic installation, and produce a control signal; And
According to described control signal, export an alarm signal, to carry out an alarm function.
15. pressure-sensing method as claimed in claim 14, wherein detect hydrodynamic pressure in the described electronic installation to produce the step of described pressure signal, be to detect the pressure that airflow is produced through a louvre of described electronic installation, to produce described pressure signal.
16. pressure-sensing method as claimed in claim 14, wherein detect hydrodynamic pressure in the described electronic installation to produce the step of described pressure signal, be the pressure that air flow produced that detects the fan drive of described electronic installation, to produce described pressure signal.
17. pressure-sensing method as claimed in claim 14, wherein export described alarm signal according to described control signal, to carry out the step of described alarm function, be at described control signal indicated pressure signal during less than a first threshold, export described alarm signal, carry out the dedusting program to notify the user.
18. pressure-sensing method as claimed in claim 14, wherein export described alarm signal according to described control signal, to carry out the step of described alarm function, be at described control signal indicated pressure signal during less than a first threshold, export described alarm signal, carry out an environment for use trace routine to notify a user.
19. pressure-sensing method as claimed in claim 14, wherein said electronic installation are a computer system.
20. pressure-sensing method as claimed in claim 19, wherein export described alarm signal according to described control signal, to carry out the step of described alarm function, be at described control signal indicated pressure signal during less than a first threshold, export the processing unit of described alarm signal to described computer system, with a operating system by described computer system, carry out a pop-up window, notify a user to carry out a dedusting program or an environment for use trace routine.
21. a heat abstractor that is used for an electronic installation comprises:
One radiating module is located in the described electronic installation, is used for producing air flow by a fan, removes heat energy to loose;
One pressure-sensing unit is used for detecting the atmospheric pressure value of described electronic installation environment for use of living in, to produce a pressure signal; And
One control module is coupled to described pressure-sensing unit and described radiating module, is used for judging the situation of change of the atmospheric pressure in the described electronic installation according to described pressure signal, and produces a speed controling signal, to control the rotating speed of described fan.
22. heat abstractor as claimed in claim 21, wherein said radiating module also comprises:
One heat pipe is connected in an intraware of described electronic installation; And
A plurality of radiating fins are connected in the other end of described heat pipe, are used for loosing removing the heat energy that described heat pipe transmitted.
23. heat abstractor as claimed in claim 22, wherein said fan are arranged at a side of described a plurality of radiating fins, are used for air is blowed to described a plurality of radiating fin, remove the heat energy on described a plurality of radiating fins to loose.
24. heat abstractor as claimed in claim 21, wherein said pressure-sensing unit are a HCE pressure sensor.
25. heat abstractor as claimed in claim 21, wherein said control module are during less than one second threshold value, to produce described speed controling signal, to improve the rotating speed of described fan at described pressure signal.
26. heat abstractor as claimed in claim 21, wherein said control module are during greater than one second threshold value, to produce described speed controling signal, to reduce the rotating speed of described fan at described pressure signal.
27. a pressure-sensing method that is used for an electronic installation comprises:
Detect the atmospheric pressure value of described electronic installation environment for use of living in, to produce a pressure signal; And
According to described pressure signal, judge the situation of change of the atmospheric pressure in the described electronic installation, and produce a speed controling signal, with the rotating speed of a fan of controlling described electronic installation.
28. pressure-sensing method as claimed in claim 27, wherein judge the situation of change of the atmospheric pressure in the described electronic installation according to described pressure signal, and produce described speed controling signal, step with the rotating speed of the described fan of controlling described electronic installation, be at described pressure signal during less than one second threshold value, produce described speed controling signal, to improve the rotating speed of described fan.
29. pressure-sensing method as claimed in claim 27, wherein judge the situation of change of the atmospheric pressure in the described electronic installation according to described pressure signal, and produce described speed controling signal, step with the rotating speed of the described fan of controlling described electronic installation, be at described pressure signal during greater than one second threshold value, produce described speed controling signal, to reduce the rotating speed of described fan.
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| CN2009101439570A CN101908013A (en) | 2009-06-04 | 2009-06-04 | Pressure sensing device, pressure sensing method and heat dissipation device for electronic device |
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| CN2009101439570A CN101908013A (en) | 2009-06-04 | 2009-06-04 | Pressure sensing device, pressure sensing method and heat dissipation device for electronic device |
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Application publication date: 20101208 |