CN1294333A - Heat radiating control system of computer - Google Patents
Heat radiating control system of computer Download PDFInfo
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- CN1294333A CN1294333A CN 99123191 CN99123191A CN1294333A CN 1294333 A CN1294333 A CN 1294333A CN 99123191 CN99123191 CN 99123191 CN 99123191 A CN99123191 A CN 99123191A CN 1294333 A CN1294333 A CN 1294333A
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- temperature
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- fan
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Abstract
A heat radiating controller for computer is composed of temp sensor to sense the temp of CPU and convert it to analog signal, A/D converter to convert said analog signal to digital signal, pulse width modulator for modulating the digital signal and outputting pulse signal to power supply of heat radiating device, and heat radiating device.
Description
The present invention relates to a kind of cooling system, relate in particular to cooling control system and heat dissipating method that a kind of computer is used.
In computer industry now, most computer systems all use fan as heat abstractor.Fan in the general computer is not that to open be exactly to close.When fan is leaving, has only a kind of speed.Because the element in the computer system can be in different state of temperatures, so this way is quite uneconomic.For desktop computer, owing to not too consider the power consumption problem, so even this fan control mode is feasible.But for the portable computer that requires power saving, as notebook computer, this fan control mode is suitable power consumption.Therefore, for more effectively controlling fan, reach the purpose of saving power supply, the someone has proposed the fan control mode of two kinds of speed.When the element in the computer system was in the condition of high temperature, fan was high rotating speed.If the element in the computer system is in low-temperature condition, then fan is the slow-speed of revolution.Because in the element of computer system, belonging to central processing unit (CPU) is the higher thermal source of temperature, thus it as the temperature index in the computer system.
Yet the fan control mode of above-mentioned two kinds of speed is defectiveness still.Because do not belong to high temperature and low temperature when central processing unit, but during other temperature, two kinds of speed of fan are neither to be suitable for.So for the foregoing reasons, formed cooling control system of the present invention.Marrow of the present invention is the different temperatures according to central processing unit, and fan has corresponding, different rotating speeds.
According to the present invention, provide a kind of cooling control system that is used for computer.This system comprises temperature sensor, analogue-to-digital converters, pulse width modulator and heat abstractor.Wherein, heat abstractor comprises fan at least.Temperature sensor is used to detect the temperature of central processing unit, and is converted into the electronic simulation signal.Then, the electronic simulation signal is exported electronic digital signal through behind the analogue-to-digital converters.Again, behind the electronic digital signal process pulse width modulator, output pulse signal.Pulse signal provides the power supply to fan.Fan is used for the heat that the dissipation central processing unit is produced.
When temperature sensor detects the different temperatures of central processing unit (CPU), can be converted into different electronic simulation signals.And then pulse width modulator can offer fan with the pulse signal with different duty.Here, the dutycycle of described pulse signal is meant the shared ratio of high potential signal in the recurrence interval.The temperature of central processing unit is higher, and the shared ratio of the dutycycle of pulse signal heals big, and the corresponding rotating speed of fan is also faster.Control the rotating speed of fan by the shared scale of the dutycycle of pulse signal.
Fig. 1 shows the cooling control system that the present invention is used for computer.
Fig. 2 shows the heat dissipating method that the present invention is used for the cooling control system of computer.
Fig. 3 shows the pulse signal of 75 percent dutycycle.
Cooling control system of the present invention, with higher control from view of profit heat abstractor, such as fan.Both can reach purpose of power saving, the effect of heat radiation was arranged again.Fig. 1 shows the cooling control system 10 that the present invention is used for computer.Temperature sensor 14 is used to detect the temperature of central processing unit 12, and is converted into the electronic simulation signal.Then, the electronic simulation signal is exported electronic digital signal through behind the analogue-to-digital converters 16.Again, behind the electronic digital signal process pulse width modulator 18, output pulse signal.Pulse signal provides the power supply to fan 20.Fan 20 is used for the heat that dissipation central processing unit 12 is produced.Above-mentioned analogue-to-digital converters 16 and pulse width modulator 18 can use the H8/3434 integrated circuit of Hitachi (Hitachi).
When temperature sensor 14 detects the different temperatures of central processing unit 12, can be converted into different electronic simulation signals.And then the pulse signal that pulse width modulator 18 can will have different duty offers fan 20.The dutycycle of described pulse signal is meant the shared ratio of high potential signal in the recurrence interval.Give an example, Fig. 3 shows the pulse signal of 75 percent dutycycle.The temperature of central processing unit 12 is higher, and the shared ratio of the dutycycle of pulse signal heals big, and the corresponding rotating speed of fan 20 is also faster.Therefore, can control the rotating speed of fan 20 by the shared scale of the dutycycle of pulse signal.
Fig. 2 shows the heat dissipating method that the present invention is used for the cooling control system 10 of computer.At first, check whether the temperature of central processing unit 12 reaches the condition of the fan 20 that blows in.If be, then open fan 20.If blow in for the first time fan 20, then allow fan 20 rotation number second at full speed, in order to avoid can't rotate too slowly because of rotating speed.If the temperature of central processing unit 12 is greater than first temperature (for example 95 ℃), then pulse width modulator 18 pulse power that will have first preset value (for example a 100%) dutycycle offers fan 20.If the temperature of central processing unit 12 is not greater than first temperature, but be positioned at second temperature range (for example 90 ℃ to 94.99 ℃), then pulse width modulator 18 pulse power that will have second preset range (for example 90% to a 99.99%) dutycycle offers fan 20.If the temperature of central processing unit 12 is not to be positioned at second temperature range, but be positioned at the 3rd temperature range (for example 85 ℃ to 89.99 ℃), then pulse width modulator 18 pulse power that will have the 3rd preset range (for example 80% to a 89.99%) dutycycle offers fan 20.If the temperature of central processing unit 12 is not to be positioned at the 3rd temperature range, but be positioned at the 4th temperature range (for example 80 ℃ to 84.99 ℃), then pulse width modulator 18 pulse power that will have the 4th preset range (for example 70% to a 79.99%) dutycycle offers fan 20.Be positioned at above-mentioned many temperature ranges if the temperature of central processing unit 12 is all non-, but be positioned at last temperature range (for example 65 ℃ to 69.99 ℃), then pulse width modulator 18 will have the pulse power of last preset range (such as 40% to 49.99%) dutycycle to fan 20.If also non-last temperature range that is positioned at of the temperature of central processing unit (CPU) 12, but the temperature of expression central processing unit (CPU) 12 does not reach the temperature (for example 65 ℃) of the fan 20 that blows in as yet, then closes fan 20.
More than describing is preferred embodiment of the present invention only, is not in order to limit the scope of protection of present invention.All other do not break away from the equivalence of being finished under the disclosed spirit and changes or modification, all should be included in the appending claims.
Claims (13)
1. a cooling control system that is used for computer is characterized in that, described cooling control system comprises at least:
One temperature sensor is used to detect the temperature of central processing unit, and is converted into the electronic simulation signal;
One analogue-to-digital converters, being used for described electronic simulation conversion of signals is electronic digital signal;
One pulse width modulator is used for the described electronic digital signal of described analogue-to-digital converters output is converted to pulse signal; And
One heat abstractor is used for the heat that the described central processing unit of dissipation is produced, and the required power supply of described heat abstractor comes from the described pulse signal of described pulse width modulator output.
2. cooling control system as claimed in claim 1 is characterized in that, the dutycycle of the described pulse signal of described pulse width modulator output is controlled by described electronic digital signal.
3. cooling control system as claimed in claim 1 is characterized in that, the dutycycle of the described pulse signal of described pulse width modulator output is that the temperature with described central processing unit changes.
4. cooling control system as claimed in claim 1 is characterized in that described heat abstractor comprises fan at least.
5. a cooling control system that is used for computer is characterized in that, described cooling control system comprises at least:
One temperature sensor is used to detect the temperature of central processing unit, and is converted into the electronic simulation signal;
One controller, being used for described electronic simulation conversion of signals is electronic digital signal, then described electronic digital signal is converted to pulse signal, and described pulse signal is the output of described controller; And
One heat abstractor is used for the heat that the described central processing unit of dissipation is produced, and the required power supply of described heat abstractor comes from the described pulse signal of described controller output.
6. cooling control system as claimed in claim 5 is characterized in that described controller comprises analogue-to-digital converters and pulse width modulator at least.
7. cooling control system as claimed in claim 5 is characterized in that, the dutycycle of the described pulse signal of described controller output is that the temperature with described central processing unit changes.
8. cooling control system as claimed in claim 5 is characterized in that, described controller comprises the H8/3434 integrated circuit of a Hitachi at least.
9. cooling control system as claimed in claim 5 is characterized in that described heat abstractor comprises fan at least.
10. a heat dissipating method that is used for computer is characterized in that, described heat dissipating method may further comprise the steps at least:
At first, check whether the temperature of central processing unit reaches the condition of the fan that blows in, if be, then opens described fan,, then allow described fan rotation number second at full speed, in order to avoid can't rotate too slowly because of rotating speed if drive described fan for the first time;
When the temperature of described central processing unit during greater than first temperature, the pulse power that will have the first preset value dutycycle offers described fan;
When the temperature of described central processing unit is not greater than first temperature, but when being positioned at second temperature range, the pulse power that will have the second preset range dutycycle offers described fan;
When the temperature of described central processing unit is not to be positioned at second temperature range, but when being positioned at the 3rd temperature range, the pulse power that will have the 3rd preset range dutycycle offers described fan;
When the temperature of described central processing unit is not to be positioned at the 3rd temperature range, but when being positioned at the 4th temperature range, the pulse power that will have the 4th preset range dutycycle offers described fan; And
Be positioned at above-mentioned all temperature ranges when the temperature of described central processing unit is all non-, but when being positioned at last temperature range, the pulse power that will have last preset range dutycycle offers described fan.
11. heat dissipating method as claimed in claim 10, it is characterized in that, described first temperature is greater than the maximum temperature of described second temperature range, the minimum temperature of described second temperature range is greater than the maximum temperature of described the 3rd temperature range, the minimum temperature of described the 3rd temperature range is greater than the maximum temperature of described the 4th temperature range, the rest may be inferred, and the highest temperature of described last temperature range is all less than the temperature of described a plurality of temperature ranges.
12. heat dissipating method as claimed in claim 10, it is characterized in that, described first preset value is greater than maximum prefetch value of establishing of described second preset range, the minimum predetermined value of described second preset range is greater than maximum prefetch value of establishing of described the 3rd preset range, the minimum predetermined value of described the 3rd preset range is greater than maximum prefetch value of establishing of described the 4th preset range, the rest may be inferred, and maximum prefetch value of establishing of described last preset range is all less than the preset value of described a plurality of preset range.
13. heat dissipating method as claimed in claim 10 is characterized in that, has the pulse power of the pulse power of the described first preset value dutycycle for a hundred per cent dutycycle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991231910A CN1184550C (en) | 1999-10-21 | 1999-10-21 | Heat radiating control system of computer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991231910A CN1184550C (en) | 1999-10-21 | 1999-10-21 | Heat radiating control system of computer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1294333A true CN1294333A (en) | 2001-05-09 |
| CN1184550C CN1184550C (en) | 2005-01-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB991231910A Expired - Fee Related CN1184550C (en) | 1999-10-21 | 1999-10-21 | Heat radiating control system of computer |
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| Country | Link |
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| CN (1) | CN1184550C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100363904C (en) * | 2005-03-05 | 2008-01-23 | 鸿富锦精密工业（深圳）有限公司 | CPU temperature sensing and correction device and method |
| CN100583002C (en) * | 2007-02-27 | 2010-01-20 | 鸿富锦精密工业（深圳）有限公司 | Radiating model set |
| CN105116978A (en) * | 2015-08-17 | 2015-12-02 | 山东超越数控电子有限公司 | Temperature control method based on Loongson processor |
| CN105652916A (en) * | 2016-01-06 | 2016-06-08 | 京东方科技集团股份有限公司 | Processor temperature control circuit |
| CN107355400A (en) * | 2017-08-21 | 2017-11-17 | 联想(北京)有限公司 | Control method for fan, device and the electronic equipment of a kind of electronic equipment |
-
1999
- 1999-10-21 CN CNB991231910A patent/CN1184550C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100363904C (en) * | 2005-03-05 | 2008-01-23 | 鸿富锦精密工业（深圳）有限公司 | CPU temperature sensing and correction device and method |
| CN100583002C (en) * | 2007-02-27 | 2010-01-20 | 鸿富锦精密工业（深圳）有限公司 | Radiating model set |
| CN105116978A (en) * | 2015-08-17 | 2015-12-02 | 山东超越数控电子有限公司 | Temperature control method based on Loongson processor |
| CN105652916A (en) * | 2016-01-06 | 2016-06-08 | 京东方科技集团股份有限公司 | Processor temperature control circuit |
| CN105652916B (en) * | 2016-01-06 | 2017-12-01 | 京东方科技集团股份有限公司 | Temperature of processor control circuit |
| CN107355400A (en) * | 2017-08-21 | 2017-11-17 | 联想(北京)有限公司 | Control method for fan, device and the electronic equipment of a kind of electronic equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1184550C (en) | 2005-01-12 |
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