CN104166299B - Projector heat radiation method and apparatus - Google Patents
Projector heat radiation method and apparatus Download PDFInfo
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- CN104166299B CN104166299B CN201410422885.4A CN201410422885A CN104166299B CN 104166299 B CN104166299 B CN 104166299B CN 201410422885 A CN201410422885 A CN 201410422885A CN 104166299 B CN104166299 B CN 104166299B
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Abstract
The invention provides a kind of projector heat radiation method and apparatus, wherein, described method comprises: the input voltage detecting a projector at interval of one section of Preset Time; Judge that the present input voltage detected is compared the last input voltage detected and whether changed; If, then according to the fan voltage of described present input voltage adjustment cooling fan, work under described cooling fan fan voltage after the adjustment, dispel the heat to projector, the heat that the heat-sinking capability under described cooling fan described fan voltage after the adjustment and projector produce under described present input voltage matches.Said method and device both ensure that projector heat radiation, again reduced the noise of projector.
Description
Technical field
The present invention relates to radiating control field, particularly relate to a kind of projector heat radiation method and apparatus.
Background technology
Projector is widely used in family, office, school and public place of entertainment.Projector generally all has wider operating voltage, and the input voltage of projector can keep normal work between 90V to 250V.In projector's rated power one timing, input voltage is lower, and the electric current of power supply can be larger.Projector's power supply makes the temperature of power supply raise by the heat that internal resistance produces, and temperature rising can cause the electronic component temperature on power supply mainboard to raise, and too high temperature can cause electronic component cisco unity malfunction, even can damage electronic component.Such as, the working temperature of the electronic component metal-oxide-semiconductor (field effect transistor) in projector can not more than 105 degree, and the temperature of thermistor can not more than 120 degree.Cooling fan in projector ensure that the normal work of projector to the heat radiation of power supply mainboard.
The higher rotation speed of the fan of operating voltage of cooling fan is faster, radiating effect is better, traditional projector heat radiation method, make the high voltage that the fan voltage of cooling fan keeps constant always, although can solve the heat dissipation problem of projector, cooling fan voltage is higher, and the noise that rotation speed of the fan produces sooner is also larger, the noise of projector is directly proportional to the fan voltage of cooling fan, and traditional projector heat radiation method makes the noise of projector too high.
Summary of the invention
Based on this, be necessary for above-mentioned technical matters, a kind of projector heat radiation method and system that radiating effect can reduce again noise that can ensure is provided.
A kind of projector heat radiation method, described method comprises:
The input voltage of a projector is detected at interval of one section of Preset Time;
Judge that the present input voltage detected is compared the last input voltage detected and whether changed;
If, then according to the fan voltage of described present input voltage adjustment cooling fan, work under described cooling fan fan voltage after the adjustment, dispel the heat to projector, the heat that the heat-sinking capability under described cooling fan described fan voltage after the adjustment and projector produce under described present input voltage matches.
Wherein in an embodiment, before the present input voltage detected in described judgement compares the step whether input voltage that once detects change, described method also comprises:
Judge that whether the present input voltage detected is abnormal;
If present input voltage is abnormal, then trigger the shutdown command of projector;
If present input voltage is normal, then enters present input voltage that described judgement detects and compare the step whether last input voltage detected change.
Wherein in an embodiment, the step whether described present input voltage judging to detect is abnormal, comprising:
Judge whether present input voltage is greater than the maximum working voltage of projector or is less than the minimum of projector, if so, then present input voltage is abnormal, and if not, then present input voltage is normal.
Wherein in an embodiment, the step of the described fan voltage according to present input voltage adjustment cooling fan, comprising:
Obtain the voltage range that described present input voltage is corresponding;
According to the mapping relations between the voltage range preset and fan voltage, the fan voltage of cooling fan is adjusted to the fan voltage corresponding with the voltage range got.
Wherein in an embodiment, after the step of shutdown command triggering projector, described method also comprises:
The off-mode of record projector is abnormal shutdown;
After receiving projector's start-up command, judge whether the off-mode of last projector is abnormal shutdown, if so, then send the warning message of electric voltage exception, if not, then according to start-up command normal boot-strap.
A kind of projector heat sink, described device comprises:
Voltage detection module, for detecting the input voltage of a projector at interval of one section of Preset Time;
Voltage judge module, for judging that the present input voltage detected is compared the last input voltage detected and whether changed;
Radiating module, if for changing, then according to the fan voltage of described present input voltage adjustment cooling fan, work under described cooling fan fan voltage after the adjustment, dispel the heat to projector, the heat that the heat-sinking capability under described cooling fan described fan voltage after the adjustment and projector produce under described present input voltage matches.
Wherein in an embodiment, described device also comprises:
Electric voltage exception judge module, whether abnormal for judging the present input voltage detected;
Shutdown protection module, if abnormal for present input voltage, then triggers the shutdown command of projector;
If present input voltage is normal, then enter described voltage judge module.
Wherein in an embodiment, electric voltage exception judge module is also for judging whether present input voltage is greater than the maximum working voltage of projector or is less than the minimum of projector, and if so, then present input voltage is abnormal, if not, then present input voltage is normal.
Wherein in an embodiment, described radiating module comprises:
Voltage range acquisition module, for obtaining voltage range corresponding to described present input voltage;
Fan voltage adjusting module, for according to the mapping relations between the voltage range preset and fan voltage, is adjusted to the fan voltage corresponding with the voltage range got by the fan voltage of cooling fan.
Wherein in an embodiment, described device also comprises:
Off-mode logging modle is abnormal shutdown for recording the off-mode of projector;
Electric voltage exception alert module, after receiving projector's start-up command, judges whether the off-mode of last projector is abnormal shutdown, if so, then sends the warning message of electric voltage exception, if not, then according to start-up command normal boot-strap.
Above-mentioned projector heat radiation method and apparatus, the fan voltage of cooling fan can be adjusted by the input voltage detecting projector, work under cooling fan fan voltage after the adjustment, projector is dispelled the heat, the heat that heat-sinking capability under cooling fan described fan voltage after the adjustment and projector are produced under described present input voltage matches, when present input voltage is low, fan voltage will improve, during present input voltage height, fan voltage will reduce, because the noise of projector is directly proportional to fan voltage, this method and system are when input voltage changes, both ensure that projector heat radiation by adjustment fan voltage, again reduce the noise of projector.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of projector heat radiation method in an embodiment;
Fig. 2 is the schematic flow sheet of projector heat radiation method in another embodiment;
Fig. 3 is the schematic flow sheet of projector heat radiation method after the step of shutdown command triggering projector in an embodiment;
Fig. 4 is the structural representation of projector heat sink in an embodiment;
Fig. 5 is the structural representation of projector heat sink in another embodiment;
Fig. 6 is the structural representation of voltage regulator module in an embodiment;
Fig. 7 is the structural representation of projector heat sink in another embodiment.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
As shown in Figure 1, in one embodiment, a kind of projector heat radiation method provided, the method comprises the steps:
Step 102, detects the input voltage of a projector at interval of one section of Preset Time.
Input voltage refers to and provides the alternating current voltage of electric energy for projector normally works, in real life, there is unstable situation in the voltage of alternating current, makes the input voltage of projector occur fluctuation, can be detected input voltage by voltage sensor, obtain the situation of change of input voltage.In the present embodiment, voltage sensor detects the input voltage of a projector at interval of one section of Preset Time, and records present input voltage.
Step 104, judges that the present input voltage detected is compared the last input voltage detected and whether changed.If so, then enter step 106, if not, then terminate.
Step 106, according to the fan voltage of present input voltage adjustment cooling fan, works under cooling fan fan voltage after the adjustment, dispels the heat to projector.
In the present embodiment, work under cooling fan fan voltage after the adjustment, projector is dispelled the heat.The power that projector normally works is constant, and when input voltage reduces, the working current of projector can increase, and electric current increases the heat that projector is produced and increases, and too much heat adds the damage probability of electronic component in projector.When input voltage raises, projector's working current can decline, and the heat that corresponding projector produces also can reduce.At interval of one section of Preset Time by voltage sensor senses input voltage, preferably, Preset Time is 5 minutes.
If the input voltage that the present input voltage detected and last time are detected is not identical, then according to the fan voltage of present input voltage adjustment cooling fan, the heat that the heat-sinking capability under cooling fan fan voltage after the adjustment and projector are produced under present input voltage matches.Match and refer to that the heat that projector can produce by cooling fan under present input voltage under fan voltage is discharged, concrete, if the last input voltage that present input voltage compares detection is that voltage increases, then reduce the fan voltage of cooling fan, if the last input voltage that present input voltage compares detection has been voltage drop, then improve the fan voltage of cooling fan.
Above-mentioned projector heat radiation method, the fan voltage of cooling fan can be adjusted by the input voltage detecting projector, work under cooling fan fan voltage after the adjustment, projector is dispelled the heat, the heat that heat-sinking capability under cooling fan described fan voltage after the adjustment and projector are produced under described present input voltage matches, when present input voltage is low, fan voltage will improve, during present input voltage height, fan voltage will reduce, because the noise of projector is directly proportional to fan voltage, this method and system are when input voltage changes, both ensure that projector heat radiation by adjustment fan voltage, again reduce the noise of projector.
As shown in Figure 2, in another embodiment, a kind of projector heat radiation method provided, the method comprises the steps:
Step 202, detects the input voltage of a projector at interval of one section of Preset Time.
Step 204, judges that whether the present input voltage detected is abnormal.If so, then enter step 206, if not, then enter step 208.
Step 206, triggers the shutdown command of projector.
Judge whether present input voltage is greater than the maximum working voltage of projector or is less than the minimum of projector, if so, then present input voltage is abnormal, and if not, then present input voltage is normal.When input voltage is abnormal, closing projector in time by triggering shutdown command, avoiding the possibility that projector causes because input voltage is abnormal damaging.
Step 208, judges that the present input voltage detected is compared the last input voltage detected and whether changed.If so, then enter step 210, if not, then terminate.
Step 210, according to the fan voltage of present input voltage adjustment cooling fan.
In the present embodiment, work, dispel the heat to projector under cooling fan fan voltage after the adjustment, the heat that the heat-sinking capability under this cooling fan fan voltage after the adjustment and projector produce under present input voltage matches
In one embodiment, step 106, the fan voltage according to present input voltage adjustment cooling fan comprises:
Obtain the voltage range that present input voltage is corresponding; According to the mapping relations between the voltage range preset and fan voltage, the fan voltage of cooling fan is adjusted to the fan voltage corresponding with the voltage range got.
Minimum input voltage projector born in advance to maximum input voltage interval division is multiple voltage range.The fan voltage of adjustment cooling fan, and the fan voltage that the input voltage recording projector is respectively corresponding when the radiating effect of each voltage range cooling fan is best, further, set up the mapping relations between voltage range and corresponding fan voltage.
Concrete, temperature sensor is utilized to detect temperature in projector in real time, when the voltage range of input voltage change cause temperature to exceed preset value time, temperature stabilization temperature sensor being detected by adjustment fan voltage is in normal range, and record fan voltage now, this fan voltage is the fan voltage under voltage range radiating effect the best.Set up the mapping relations between this voltage range and corresponding fan voltage.In one embodiment, the mapping relations of voltage range and fan voltage are stored in the storer of projector.
Such as, the minimum input voltage that projector bears is 90V, maximum input voltage is 250V, the fan voltage scope of cooling fan is 4V ~ 12V, in advance the voltage range of 90V ~ 250V can be divided into: 90V ~ 130V, 130V ~ 180V, 180V ~ 210V and 210V ~ 250V tetra-voltage ranges, if the fan voltage of the cooling fan that four voltage ranges are corresponding is respectively 12V, 9.5V, 7V and 5.4V, set up above-mentioned four voltage ranges and the mapping relations between corresponding fan voltage respectively.
As shown in Figure 3, in one embodiment, in step 206, after triggering the shutdown command of projector, the method is further comprising the steps of:
Step 302, is labeled as abnormal shutdown by the off-mode of projector.
Step 304, after receiving projector's start-up command, judges whether the off-mode of last projector is abnormal shutdown.If so, then enter step 306, if not, then enter step 308.
Step 306, sends the warning message of electric voltage exception.
Step 308, according to start-up command normal boot-strap.
In the present embodiment, the shutdown command of triggering is the shutdown command when input voltage is abnormal in order to protect projector automatically to produce.When projector causes shutdown because input voltage is abnormal, the off-mode of projector is labeled as abnormal shutdown, when next time opens projector by audio alert or in start-up picture display alarm information, this warning message is used for that the input voltage of reminding user projector is too low or input voltage is too high.There are abnormal conditions by the alternating current voltage in warning message reminding user projector environment for use.
As shown in Figure 4, in one embodiment, a kind of projector heat sink provided, this device comprises:
Voltage detection module 40, for detecting the input voltage of a projector at interval of one section of Preset Time.
Voltage judge module 42, for judging that the present input voltage detected is compared the last input voltage detected and whether changed.
Radiating module 44, if for changing, then according to the fan voltage of present input voltage adjustment cooling fan, work under this cooling fan fan voltage after the adjustment, dispel the heat to projector, the heat that the heat-sinking capability under this cooling fan fan voltage after the adjustment and projector produce under present input voltage matches.
As shown in Figure 5, in another embodiment, projector heat sink also comprises:
Electric voltage exception judge module 41, whether abnormal for judging the present input voltage detected.
Shutdown protection module 43, if abnormal for present input voltage, triggers the shutdown command of projector.If present input voltage is normal, then enter voltage judge module 42.
In one embodiment, electric voltage exception judge module 41 is also for judging whether present input voltage is greater than the maximum working voltage of projector or is less than the minimum of projector, and if so, then present input voltage is abnormal, and if not, then present input voltage is normal.
As shown in Figure 6, in one embodiment, radiating module 44 comprises:
Voltage range acquisition module 442, for obtaining voltage range corresponding to present input voltage.
Fan voltage adjusting module 444, for according to the mapping relations between the voltage range preset and fan voltage, is adjusted to the fan voltage corresponding with the voltage range got by the fan voltage of cooling fan.
As shown in Figure 7, in one embodiment, projector heat sink also comprises:
Off-mode logging modle 45 is abnormal shutdown for recording the off-mode of projector.
Electric voltage exception alert module 46, after receiving projector's start-up command, judges whether the off-mode of last projector is abnormal shutdown, if so, then sends the warning message of electric voltage exception, if not, then according to start-up command normal boot-strap.
Above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (8)
1. a projector heat radiation method, described method comprises:
The input voltage of a projector is detected at interval of one section of Preset Time;
Judge that the present input voltage detected is compared the last input voltage detected and whether changed;
If, then according to the fan voltage of described present input voltage adjustment cooling fan, work under described cooling fan fan voltage after the adjustment, dispel the heat to projector, the heat that the heat-sinking capability under described cooling fan described fan voltage after the adjustment and projector produce under described present input voltage matches;
Before the present input voltage detected in described judgement compares the step whether input voltage that once detects change, described method also comprises:
Judge that whether the present input voltage detected is abnormal;
If present input voltage is abnormal, then trigger the shutdown command of projector;
If present input voltage is normal, then enters present input voltage that described judgement detects and compare the step whether last input voltage detected change.
2. method according to claim 1, is characterized in that, the step whether described present input voltage judging to detect is abnormal, comprising:
Judge whether present input voltage is greater than the maximum working voltage of projector or is less than the minimum of projector, if so, then present input voltage is abnormal, and if not, then present input voltage is normal.
3. require the method described in 1 according to power, it is characterized in that, the step of the described fan voltage according to present input voltage adjustment cooling fan, comprising:
Obtain the voltage range that described present input voltage is corresponding;
According to the mapping relations between the voltage range preset and fan voltage, the fan voltage of cooling fan is adjusted to the fan voltage corresponding with the voltage range got.
4. method according to claim 1, is characterized in that, after the step of shutdown command triggering projector, described method also comprises:
The off-mode of record projector is abnormal shutdown;
After receiving projector's start-up command, judge whether the off-mode of last projector is abnormal shutdown, if so, then send the warning message of electric voltage exception, if not, then according to start-up command normal boot-strap.
5. a projector heat sink, is characterized in that, described device comprises:
Voltage detection module, for detecting the input voltage of a projector at interval of one section of Preset Time;
Voltage judge module, for judging that the present input voltage detected is compared the last input voltage detected and whether changed;
Radiating module, if for changing, then according to the fan voltage of described present input voltage adjustment cooling fan, work under described cooling fan fan voltage after the adjustment, dispel the heat to projector, the heat that the heat-sinking capability under described cooling fan described fan voltage after the adjustment and projector produce under described present input voltage matches;
Electric voltage exception judge module, whether abnormal for judging the present input voltage detected;
Shutdown protection module, if abnormal for present input voltage, then triggers the shutdown command of projector;
If present input voltage is normal, then enter described voltage judge module.
6. device according to claim 5, is characterized in that, electric voltage exception judge module is also for judging whether present input voltage is greater than the maximum working voltage of projector or is less than the minimum of projector, if, then present input voltage is abnormal, and if not, then present input voltage is normal.
7. require the device described in 5 according to power, it is characterized in that, described radiating module comprises:
Voltage range acquisition module, for obtaining voltage range corresponding to described present input voltage;
Fan voltage adjusting module, for according to the mapping relations between the voltage range preset and fan voltage, is adjusted to the fan voltage corresponding with the voltage range got by the fan voltage of cooling fan.
8. device according to claim 5, is characterized in that, described device also comprises:
Off-mode logging modle is abnormal shutdown for recording the off-mode of projector;
Electric voltage exception alert module, after receiving projector's start-up command, judges whether the off-mode of last projector is abnormal shutdown, if so, then sends the warning message of electric voltage exception, if not, then according to start-up command normal boot-strap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410422885.4A CN104166299B (en) | 2014-08-25 | 2014-08-25 | Projector heat radiation method and apparatus |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410422885.4A CN104166299B (en) | 2014-08-25 | 2014-08-25 | Projector heat radiation method and apparatus |
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| CN104166299A CN104166299A (en) | 2014-11-26 |
| CN104166299B true CN104166299B (en) | 2016-02-17 |
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| CN113093461B (en) * | 2021-04-12 | 2022-03-29 | 深圳市和天创科技有限公司 | Projector cooling method and system |
| CN116066392A (en) * | 2023-02-20 | 2023-05-05 | 峰米(重庆)创新科技有限公司 | Method, device, equipment and storage medium for monitoring cooling fan |
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| KR100582777B1 (en) * | 2003-08-29 | 2006-05-23 | 엘지전자 주식회사 | a cooling device and the method for projection display |
| JP2006184810A (en) * | 2004-12-28 | 2006-07-13 | Casio Comput Co Ltd | Electronic device and cooling method for electronic device |
| JP2006235074A (en) * | 2005-02-23 | 2006-09-07 | Casio Comput Co Ltd | Electronic device and method for cooling electronic device |
| CN101587286A (en) * | 2008-05-20 | 2009-11-25 | 三星电子株式会社 | Image projecting apparatus |
| CN101614341A (en) * | 2009-07-28 | 2009-12-30 | 苏州佳世达光电有限公司 | Light-emitting device and cooling means thereof, projecting apparatus |
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2014
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100582777B1 (en) * | 2003-08-29 | 2006-05-23 | 엘지전자 주식회사 | a cooling device and the method for projection display |
| JP2006184810A (en) * | 2004-12-28 | 2006-07-13 | Casio Comput Co Ltd | Electronic device and cooling method for electronic device |
| JP2006235074A (en) * | 2005-02-23 | 2006-09-07 | Casio Comput Co Ltd | Electronic device and method for cooling electronic device |
| CN101587286A (en) * | 2008-05-20 | 2009-11-25 | 三星电子株式会社 | Image projecting apparatus |
| CN101614341A (en) * | 2009-07-28 | 2009-12-30 | 苏州佳世达光电有限公司 | Light-emitting device and cooling means thereof, projecting apparatus |
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