CN2565238Y - Heat radiating system for electronic device - Google Patents

Heat radiating system for electronic device Download PDF

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Publication number
CN2565238Y
CN2565238Y CN 02236971 CN02236971U CN2565238Y CN 2565238 Y CN2565238 Y CN 2565238Y CN 02236971 CN02236971 CN 02236971 CN 02236971 U CN02236971 U CN 02236971U CN 2565238 Y CN2565238 Y CN 2565238Y
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China
Prior art keywords
temperature
fan
casing
air
microprocessor
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Expired - Lifetime
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CN 02236971
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Chinese (zh)
Inventor
赖志敏
赵仁成
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BenQ Corp
Qisda Corp
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Benq Dentsu Co ltd
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Priority to CN 02236971 priority Critical patent/CN2565238Y/en
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Abstract

The utility model relates to a heat radiating system for electronic devices; the electronic device comprises a casing of which the upper surface is provided with an air inlet and an air outlet, a fan arranged in the casing, wherein, air is led by the fan flows into the casing from the air inlet and the air is led by the fan flows out of the casing from the air outlet, a first temperature detector for measuring first temperature arranged at the casing position near the air inlet, and a second temperature detector for measuring second temperature arranged at the casing position near the air outlet. According to the first temperature to find out a plurality of groups of fan rotating speed with relative to the second temperature, then, the utility model makes use of the ratio and the judgment value of the second temperature and the first temperature to compare and to select a fan speed; the electronic device can regulate the fan speed according to selected relationship curves to reach expected heat radiating effect.

Description

The cooling system of electronic installation
Technical field
The utility model is the cooling system about electronic installation, especially about still can keep the device of radiating effect under varying environment.
Background technology
When electronic installation turned round, because of electronic component work, inner meeting produced heat.Especially in use, the heat that is sent when operating except that electronic component, inner projection lamp more can produce a large amount of heats as projector.These caloric requirements that send help heat radiation by cooling system, influence the life-span of electronic building brick to avoid over-heat inside.Even surmount system's serviceability temperature, and make this electronic installation to use.In numerous heat dissipating methods, utilizing air cooling is one of main method.Utilize the fan cold air that casing is outer to import, the heat that electronic installation inside is produced is derived outside the casing, promptly can reach the effect of cooling system.
Fig. 1 is the cooling system schematic diagram in the prior art.Electronic installation has casing 10, and air inlet 132 and air outlet 134 are arranged on the casing.In the casing fan 122 is arranged near air inlet 132, advance by air inlet 132 to enter casing 10 in order to air-guiding; Fan 124 is arranged near the air outlet 134, and air-guiding flows out casing 10 by air outlet 134.When fan 122 and 124 rotating speeds were fast more, radiating effect was good more, but noise can accelerate and strengthens with the fan rotating speed.Therefore too high for fear of noise, when internal temperature was low, fan 122 and 124 rotating speed were lower, and rotation speed of the fan can reach suitable radiating effect.When internal temperature raises, accelerate fan 122 and 124 rotating speeds again, reach the radiating effect of expection.The relation of temperature and rotation speed of the fan is by microprocessor 102 controls.For this reason, have a Temperature Detector 104 to be positioned near the air inlet 132, measured temperature is delivered to microprocessor 102 via circuit 112.Via circuit 114 and 116, microprocessor 102 transmits controlling signal and gives fan 122 and 124 to control its rotating speed.The relation of microprocessor 102 internal reservoir, one temperature and rotating speed, this relation can correspondence become a curve, as shown in Figure 2.
Fig. 2 is the stored temperature in microprocessor 102 inside and the graph of a relation of rotation speed of the fan.R wherein 0When beginning power supply for system, the speed of fan running, when Temperature Detector 104 detected temperature at T 0Below the value, rotation speed of the fan can be kept lower rotating speed R 0The temperature increase that arrives when Temperature Detector 104 arrives T aThe time, microprocessor 102 can improve the rotating speed of fan 122 and 124 to R a, to promote the efficient of heat radiation; The temperature of measuring when Temperature Detector 104 reaches T bThe time, microprocessor 102 more improves the rotating speed of fan 122 and 124 to R bSo Temperature Detector 104 detected temperature are at T 0With T mBetween, microprocessor 102 can be adjusted the rotating speed of fan 122 and 124 according to the correlation of its temperature inside and rotating speed, surpasses T and work as the temperature that detects m, this moment, rotation speed of the fan arrived R mJust no longer increase.Because of R mBe the rev limit of fan 122 and 124, only can keep R mRotating speed.So the temperature of this electronic installation operate as normal can not surpass T m
Fig. 3 is the operation workflow figure of cooling system.At first in step 202, Temperature Detector is measured temperature T.Then in step 204, temperature T is delivered to microprocessor 102.In step 206, microprocessor 102 judges whether temperature T is higher than T 0Value, this T 0Value is for building in advance in the microprocessor 102.When temperature T less than T 0During value, then carry out step 208, microprocessor can not improve the rotating speed of fan, and keeps R 0Rotating speed.When T greater than T 0During value, in step 210, whether the microprocessor judges temperature T is lower than T m, this T mValue is for building in advance in the microprocessor 102.When the temperature T of detector measurement amount at T mOn, then carry out step 212, microprocessor can't improve the rotating speed of fan, and keeps R mRotating speed.After above-mentioned steps, when temperature T is T 0With T mBetween, then whether the microprocessor judges temperature T changes, shown in step 214.Then do not keep existing rotating speed if having to change, shown in step 216.As changing to some extent, then according to temperature of being set up in the microprocessor and rotating speed relativeness, relation is found out corresponding rotating speed thus, transmit controlling signal by microprocessor via circuit 114 and 116 and give fan 122 and 124, adjust two rotation speeds of the fan, to reach predetermined radiating effect, shown in step 218.
Yet the environment of the use of electronic installation is not to immobilize, and for example is lower than an atmospheric local electronic installation that uses at air pressure.Because air pressure is lower, air is thinner, utilizes this moment the cooling system of air heat radiation will face test.When air pressure is lower than an atmospheric pressure, same rotation speed of the fan, can throughput can be than following can produce little of an atmospheric pressure.Thus, the device as Fig. 1 will have the not good problem of radiating effect.Because rarefaction of air, the air-flow that fan produced is less, and the heat that radiating airflow can be taken away is less, and radiating effect is not good, but temperature-resistant in these simultaneous temperature detector 104 measurements, microprocessor 102 can not raise fan 122 and 124 rotating speeds.But inner heat continues accumulation, and thus, electronic system can take place because of the too high problem of heat, and is aging or surpass its working temperature as part, system thereby can't normal operation.
Summary of the invention
The purpose of this utility model is to allow the cooling system of electronic installation under varying environment, still can keep the radiating effect of expecting.
Further purpose of the present utility model is for allowing electronic installation, is being in the highland and air pressure is low, under the environment of rarefaction of air, can with the level land atmospheric pressure environment under obtain identical radiating effect.
The cooling system of this electronic installation comprises: a casing; One is positioned at the air inlet on this casing; One is positioned at the air outlet on this casing; One is placed in first fan in this casing, and this first fan direct air flows into this casing from this air inlet, and direct air flows out this casing from this air outlet; One is placed in this casing near this air inlet place and be used to measure first Temperature Detector of one first temperature; One is placed in this casing near this air outlet place and be used to measure second Temperature Detector of one second temperature; An and microprocessor that is positioned at this casing, this microprocessor is controlled this first rotation speed of the fan, and inner first temperature and the first rotation speed of the fan relativeness that establishes many groups, it is different and different with this second temperature according to this first temperature to organize relativenesses more, and wherein this microprocessor is determined this first rotation speed of the fan with second temperature and this first temperature ratio.
Description of drawings
Fig. 1 is the cooling system that is used for electronic installation in the prior art;
Fig. 2 is for being built in the temperature and the rotation speed of the fan graph of a relation of microprocessor in the prior art;
Fig. 3 is the operation workflow figure of the cooling system of prior art;
Fig. 4 is first embodiment of the present utility model, comes the direct air casing inside of flowing through with fan 322 and fan 324;
Fig. 5 is in the utility model, in be built in the temperature T of microprocessor 1With the rotation speed of the fan graph of a relation;
Fig. 6 is second embodiment of the present utility model, comes the direct air casing inside of flowing through with fan 324;
Fig. 7 is cooling system operation workflow figure of the present utility model.
The element numbers explanation
10 casings, 102 microprocessors
104 Temperature Detectors, 112,114,116 circuits
122,124 fans, 132 air inlets
134 air outlets
30 casings, 302 microprocessors
304 first Temperature Detectors, 306 second Temperature Detectors
312,314,316,318 circuits, 322,324 fans
332 air inlets, 334 air outlets
Embodiment
The purpose of this utility model is different environment, and under the especially different air pressure, cooling system still can be kept default radiating effect.At air inlet and air outlet Temperature Detector is set respectively.Adjust rotation speed of the fan by the temperature that two Temperature Detectors are measured, improve in the not good shortcoming of high altitude environment radiating effect.
Please refer to Fig. 4, Fig. 4 is a preferred embodiment of the present utility model.On the casing 30 of electronic installation, an air inlet 332 and an air outlet 334 are arranged.Decide according to the design of electronic installation the position of air inlet 332 and air outlet 334.Fan 322 and fan 324 are respectively and are placed in air inlet 332 and air outlet 334 places.Fan 322 direct air enter casing 30 via air inlet 332, and wind direction as shown by arrows.Air in 324 guidings of fan casing is flowed out by air outlet 324, and wind direction as shown by arrows.
In order to control the running of fan, there is a microprocessor 302 to transmit controlling signal respectively to fan 322 and 324 in the casing, with the rotating speed of control fan via circuit 316 and 318.In order to understand the air themperature that flows out in outer inflow of casing and the casing, first and second Temperature Detectors are separately positioned in the casing near air inlet 332 and air outlet 334.Wherein first Temperature Detector is measured first temperature T 1, measure second temperature T at second Temperature Detector 2, and send into microprocessor 302 via circuit 312 and circuit 314.Microprocessor is controlled rotation speed of the fan according to first Temperature Detector and the measured temperature of second Temperature Detector, reaches the radiating effect of expection.
The method of control as shown in Figure 5, rotation speed of the fan R wherein 0And R mBe respectively the minimum and maximum speed of fan, the detected temperature T of first Temperature Detector this moment 1Equal T respectively 0Value and T M1Value.Curve 1 representative is to use under the atmospheric environment as electronic installation at air pressure under general situation, the relation of the rotation speed of the fan and first temperature.When electronic installation environment for use difference, for example environment for use air pressure is lower, and as at air pressure being 679 millibars (mbar) and air when thinner, the air-flow that intrasystem accumulation heat can't effectively produce by existing rotation speed of the fan be taken away.Must improve the rotating speed of fan, take away more substantial heat.That is the relation of rotation speed of the fan and temperature must be adjusted into curve 2, the relation of rotation speed of the fan and temperature when curve 2 is represented the air pressure step-down.The mode of the fan running of curve 1 and curve 2 is identical with Fig. 2.
The mode of adjusting trade-off curve 2 as for microprocessor is: when the temperature T of the first Temperature Detector detection limit 1For between T 0And T M1Between T c, be respectively R with respect to the rotation speed of the fan of curve 1 and curve 2 C1, R C2Microprocessor has in temperature T cJudgment value M C1With M C2, can judge temperature ratio (T earlier 2/ T 1) and M C1With M C2More approaching with which judgment value, for detecting temperature T at first detector CThe time be used for judging the benchmark that curve 1 or curve 2 use.If temperature ratio (T 2/ T 1) near judgment value M C1, then adopt the temperature rotation speed relation of curve 1 to adjust rotation speed of the fan to R C1If temperature ratio (T 2/ T 1) near judgment value M C2, then adopting the temperature rotation speed relation adjustment rotation speed of the fan of curve 2 is R C2, if this cooling system has another second fan and is positioned at air intake vent, then this microprocessor 302 also can be adjusted the rotating speed of second fan simultaneously when adjusting first fan.
Used two sets of curves to be example among Fig. 5, curve 1 is represented respectively with curve 2 and is under two kinds of different atmospheric pressure environment the corresponding relation of detected temperatures and rotation speed of the fan.Based on notion of the present utility model, can use curve and two groups of above judgment value more than two according to different atmospheric environment.So this electronic installation can be done more accurate adjustment to rotation speed of the fan under various different atmospheric pressure.
Fig. 6 is that another preferred embodiment of the present utility model and Fig. 4 difference are that the fan number of direct air is one.The position of fan 324 fits into the position of air port 322 and air outlet 324 and decides, to reach the purpose that direct air flows to.As shown in Figure 6, fan 324 is near air outlet 334, and when fan 324 runnings and direct air were flowed out by air outlet 334, the cold air casing 30 outside can so reach the purpose of air circulation and heat radiation via in the air inlet 332 inflow casings 30.Remaining part is identical with Fig. 4, is not given unnecessary details at this.The purpose that fan is set is direct air, more than one fan is set in the electronic installation can reaches this purpose.Therefore as long as come direct air with cooling casing inside, and the cooling system of Temperature Detector is set, all within the scope of the utility model protection in air inlet and air outlet with an above fan.
Fig. 7 is the flow chart of cooling system of the present utility model.When electronic installation operates,, measure temperature T at first Temperature Detector 304 as step 402 1, measure temperature T at second Temperature Detector 306 2Then in step 404, with first temperature T 1And second temperature T 2Deliver to microprocessor 302.In step 406, the microprocessor judges temperature T 1Whether be higher than T 0Value, this T 0Value is for building in advance in the microprocessor 302.The temperature T that measures when detector 1Less than at T 0Value then carry out step 408, and microprocessor can not improve the rotating speed of fan, and keeps R 0Rotating speed.Afterwards in step 410, the microprocessor judges temperature T 1Whether be lower than T M1This T M1Value is for building in advance in the microprocessor 102.The temperature T that measures when detector is greater than T M1Value then carry out step 412, and microprocessor can't improve the rotating speed of fan, and keeps R mRotating speed.
If temperature T 1Between temperature T 0And T M1Between, in step 414, C.T ratio (T 2/ T 1) whether near judgment value M C1Or M C2These two values are in advance for being located in advance in the microprocessor 302, as working as temperature T 1=T CIn time, judged with the serviceability temperature-rotation speed relation curve 1 or the usefulness of temperature-rotation speed relation curve 2.If temperature ratio (T 2/ T 1) approach M C2, then carry out step 416, judge temperature T 1Whether change.If temperature T 1Change, then carry out step 420, change the rotating speed that rotation speed of the fan is a relative temperature according to curve 2.If in step 416, temperature T 1Do not change, then keep the existing rotating speed of fan, shown in step 424.If in step 414, temperature ratio (T 2/ T 1) approach M C1, then carry out step 418, judge temperature T 1Whether change.If temperature T 1Change, then carry out step 422, according to curve 1, changing rotation speed of the fan is the rotating speed of relative temperature.If in step 418, temperature T 1Do not change, then keep the existing rotating speed of fan, shown in step 426.
The ratio that is characterised in that with air outlet temperature and intake air temperature of the present utility model is as the foundation of microprocessor judges radiating effect.The number of temperature and rotation speed of the fan relation curve and judgment value can be according to the memory capacity design of electronic installation needs and microprocessor.Be not limited to 2 curves and 2 judgment value.By the magnitude relationship of second temperature and first temperature ratio and a plurality of judgment value relatively, select wherein one group of temperature and the standard of rotation speed of the fan relation as the adjustment rotation speed of the fan, all belong to the scope that the utility model is protected.
Those skilled in the art should know understanding, and the utility model can not break away under spirit of the present utility model and the scope, is implemented with other many particular forms.Therefore, the embodiment that provides now should be taken as explanation, rather than restriction, and the details that the utility model is not subjected in the specification and is given is limited to, can be with make replacement and the modification that is equal in the utility model claims scope.

Claims (5)

1. cooling system that is used for an electronic installation, described cooling system comprises: a casing; One is positioned at the air inlet on the described casing; One is positioned at the air outlet on the described casing; One is placed in first fan in the described casing, and the described first fan direct air flows into described casing from described air inlet, and direct air and flow out described casing from described air outlet; One is placed in described casing near described air inlet place and be used to measure first Temperature Detector of one first temperature; One is placed in described casing near described air outlet place and be used to measure second Temperature Detector of one second temperature; An and microprocessor that is positioned at described casing, described microprocessor is controlled described first rotation speed of the fan, and inner first temperature and the first rotation speed of the fan relativeness that establishes many groups, described many group relativenesses are different and different with described second temperature according to described first temperature, and wherein said microprocessor is determined described first rotation speed of the fan with second temperature and described first temperature ratio.
2. cooling system as claimed in claim 1 is characterized in that: described microprocessor also comprises many group judgment value, determines described first rotation speed of the fan with the most approaching described judgment value of ratio of described second temperature and described first temperature.
3. cooling system as claimed in claim 1 is characterized in that: described first fan is placed near described air outlet place.
4. cooling system as claimed in claim 3 is characterized in that: also comprise one second fan, this second fan is placed in described air inlet place, and direct air flows into described casing.
5. cooling system as claimed in claim 4 is characterized in that: described microprocessor is adjusted described second rotation speed of the fan simultaneously.
CN 02236971 2002-06-10 2002-06-10 Heat radiating system for electronic device Expired - Lifetime CN2565238Y (en)

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CN 02236971 CN2565238Y (en) 2002-06-10 2002-06-10 Heat radiating system for electronic device

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CN 02236971 CN2565238Y (en) 2002-06-10 2002-06-10 Heat radiating system for electronic device

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101369094B (en) * 2007-08-17 2010-10-13 精工爱普生株式会社 Projector
CN102339110A (en) * 2010-07-23 2012-02-01 鸿富锦精密工业（深圳）有限公司 Data centre and server thereof
CN103068206A (en) * 2011-10-20 2013-04-24 联发科技（新加坡）私人有限公司 Flow guide heat sink and flow guide heat dissipating method
CN103124884A (en) * 2010-09-30 2013-05-29 大金工业株式会社 Outdoor unit for refrigeration device
CN103411377A (en) * 2013-08-29 2013-11-27 合肥美的电冰箱有限公司 Microwave oven refrigerator and control method of radiating motor thereof
CN103941834A (en) * 2014-03-18 2014-07-23 江苏中利电子信息科技有限公司 Ventilation structure of ad hoc network terminal
CN104182018A (en) * 2014-09-11 2014-12-03 浪潮电子信息产业股份有限公司 Method for performing server cooling through atmospheric pressure changes
CN106681889A (en) * 2016-12-01 2017-05-17 重庆诚硕科技有限公司 Warning method for office computers
CN109491479A (en) * 2018-12-27 2019-03-19 武汉西山艺创文化有限公司 A kind of computer case radiation mechanism and heat dissipating method based on vertical turbine fan
CN109491480A (en) * 2018-12-27 2019-03-19 武汉西山艺创文化有限公司 A kind of server radiating mechanism and heat dissipating method based on vertical turbine fan
CN111102603A (en) * 2019-12-19 2020-05-05 华帝股份有限公司 Igniter with cooling function and cooling control method applying igniter

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101369094B (en) * 2007-08-17 2010-10-13 精工爱普生株式会社 Projector
CN102339110A (en) * 2010-07-23 2012-02-01 鸿富锦精密工业（深圳）有限公司 Data centre and server thereof
CN103124884B (en) * 2010-09-30 2015-05-13 大金工业株式会社 Outdoor unit for refrigeration device
CN103124884A (en) * 2010-09-30 2013-05-29 大金工业株式会社 Outdoor unit for refrigeration device
CN103068206A (en) * 2011-10-20 2013-04-24 联发科技（新加坡）私人有限公司 Flow guide heat sink and flow guide heat dissipating method
CN103068206B (en) * 2011-10-20 2015-09-02 联发科技（新加坡）私人有限公司 Deflecting radiator and flow-guiding radiation method
CN103411377B (en) * 2013-08-29 2016-01-13 合肥美的电冰箱有限公司 The control method of microwave oven and refrigerator and radiating motor thereof
CN103411377A (en) * 2013-08-29 2013-11-27 合肥美的电冰箱有限公司 Microwave oven refrigerator and control method of radiating motor thereof
CN103941834A (en) * 2014-03-18 2014-07-23 江苏中利电子信息科技有限公司 Ventilation structure of ad hoc network terminal
CN104182018A (en) * 2014-09-11 2014-12-03 浪潮电子信息产业股份有限公司 Method for performing server cooling through atmospheric pressure changes
CN106681889A (en) * 2016-12-01 2017-05-17 重庆诚硕科技有限公司 Warning method for office computers
CN109491479A (en) * 2018-12-27 2019-03-19 武汉西山艺创文化有限公司 A kind of computer case radiation mechanism and heat dissipating method based on vertical turbine fan
CN109491480A (en) * 2018-12-27 2019-03-19 武汉西山艺创文化有限公司 A kind of server radiating mechanism and heat dissipating method based on vertical turbine fan
CN109491480B (en) * 2018-12-27 2022-02-08 武汉西山艺创文化有限公司 Server heat dissipation mechanism and heat dissipation method based on vertical turbofan
CN111102603A (en) * 2019-12-19 2020-05-05 华帝股份有限公司 Igniter with cooling function and cooling control method applying igniter

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Expiration termination date: 20120610

Granted publication date: 20030806