CN104914652A - Device and method for detecting blockage of projector dust screen - Google Patents
Device and method for detecting blockage of projector dust screen Download PDFInfo
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- CN104914652A CN104914652A CN201510331188.2A CN201510331188A CN104914652A CN 104914652 A CN104914652 A CN 104914652A CN 201510331188 A CN201510331188 A CN 201510331188A CN 104914652 A CN104914652 A CN 104914652A
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- wind wheel
- air filter
- projector
- air
- detector unit
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
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Abstract
The invention relates to a device and a method for detecting blockage of a projector dust screen. The device comprises a shell, a first temperature detecting element, a second temperature detecting element, a blocking layer and a dust screen, wherein an inner air passage and an outer air passage are formed in the shell; the outer air passage is communicated with the exterior of the shell through the dust screen; the outer air passage is provided with a first passage and a second passage; the outer air passage is communicated with the inner air passage through the first passage and the second passage respectively; wind wheels are arranged in the first passage; the blocking layer is arranged in the second passage; the first temperature detecting element is arranged on one side of the dust screen; and the second temperature detecting element is arranged on one side of the blocking layer and is positioned in the outer air passage. The temperatures of the dust screen and the blocking layer are detected, whether the dust screen is blocked is judged according to the temperature difference of the dust screen and the blocking layer, and the blockage of the dust screen is detected efficiently in real time by utilizing that the temperature of the blocking layer can change along with the blockage condition of the dust screen.
Description
Technical field
The present invention relates to projector, particularly relate to projector Air Filter blockage detector and detection method.
Background technology
Along with progress and the economic development of society, projector uses more and more frequent in various activity, meeting, also more and more higher to the requirement of projector, such as his noise, sharpness, contrast, regulates projection orientation etc. automatically.
Projector can launch the very high picture of brightness, need highlighted bulb luminous during work, bulb also can produce a large amount of heats while luminescence, the heat produced during projector work is mainly discharged by fan, during work, fan sucks cold air from one end of projector, hot-air is discharged again from the other end of projector, heat is constantly taken out of by the air of flowing from projector, prevent the element inside projector from damaging because temperature is too high, a lot of optical mirror slip is had to need cooling inside projector, the clean requirement of optical mirror slip to cooling-air is very high, so the air entering projector first must carry out dust-proof process, namely air enter projector inner time first by Air Filter by the dust adsorption in air.
At the working environment that koniology is many, projector Air Filter is easy to adsorb too much dust at short notice and block, need to clear up timely during the blocking of projector Air Filter, otherwise projector inner member can because projector deficiency of air causes heat to shed in time and to damage.Current projector goes reminding user to clear up Air Filter by the mode of timed reminding, this method has very large deficiency, because the blocking speed of projector Air Filter is different in different operating environments, can block very soon dusty time, user is the blocking of projector Air Filter in unwitting situation, causes projector internal component damage.
Summary of the invention
Based on this, be necessary the defect lacked effectively for existing projector, Air Filter blocks early warning mechanism timely, a kind of efficient, low energy consumption is provided, projector Air Filter blockage detector and the detection method of Air Filter blocking can be fed back in time.
A kind of projector Air Filter blockage detector, comprise: shell, first detector unit, second detector unit, barrier layer and Air Filter, interior air channel and outer air duct is provided with in shell, described outer air duct is by the ft connection of Air Filter and shell, described outer air duct has first passage and second channel, described outer air duct is respectively by first passage, second channel is communicated with described interior air channel, wind wheel is provided with in described first passage, described barrier layer is arranged in described second channel, described first detector unit is arranged at described Air Filter side, described second detector unit is arranged at described barrier layer side and described second detector unit is positioned at described outer air duct.
In one embodiment, described barrier layer is set to spongy layer.
In one embodiment, described spongy layer is set to three layers.
In one embodiment, described first detector unit is arranged at inside described Air Filter.
In one embodiment, described wind wheel quantity is set to four.
In one embodiment, described wind wheel comprises the first wind wheel, the second wind wheel, the 3rd wind wheel and the 4th wind wheel, and described first wind wheel, described second wind wheel and described 3rd wind wheel, described 4th wind wheel are vertical.
In one embodiment, described 3rd wind wheel and described 4th wind wheel are arranged side by side.
A kind of projector detecting clogging of dust screen, comprising:
Obtain the temperature value of the first temperature detecting point near Air Filter;
Obtain the temperature value of the second temperature detecting point near spongy layer;
Judge whether the difference of the temperature value of the second temperature detecting point and the temperature value of the first temperature detecting point is greater than predetermined threshold value, if it is send Air Filter blocking and remind.
In one embodiment, obtain near Air Filter and be positioned at the temperature value of the first temperature detecting point of outer air duct.
In one embodiment, obtain near spongy layer and be positioned at the temperature value of the second temperature detecting point of outer air duct.
Above-mentioned projector Air Filter blockage detector and detection method, by detecting the temperature of Air Filter and barrier layer side, judge whether Air Filter blocks according to the temperature difference between the two, utilize the temperature of barrier layer side can change with Air Filter stopping state, efficiently, detect in time the blocking of Air Filter, there is the feature of low energy consumption.
Accompanying drawing explanation
Fig. 1 is the three-dimensional exploded view of the projector of one embodiment of the invention;
Fig. 2 is the stereographic map of the outer air duct of the projector Air Filter blockage detector of one embodiment of the invention;
Fig. 3 is the stereographic map in the interior air channel of the projector Air Filter blockage detector of one embodiment of the invention;
Fig. 4 is the structural representation of the projector Air Filter blockage detector of one embodiment of the invention.
Embodiment
For the ease of understanding the present invention, below with reference to relevant drawings, the present invention is described more fully.Better embodiment of the present invention is given in accompanying drawing.But the present invention can realize in many different forms, is not limited to embodiment described herein.On the contrary, provide the object of these embodiments be make to disclosure of the present invention understand more thorough comprehensively.
It should be noted that, when element is called as " being arranged at " another element, directly can there is element placed in the middle in it on another element or also.When an element is considered to " connection " another element, it can be directly connected to another element or may there is centering elements simultaneously.Term as used herein " vertical ", " level ", "left", "right" and similar statement just for illustrative purposes, do not represent it is unique embodiment.
Unless otherwise defined, all technology used herein and scientific terminology are identical with belonging to the implication that those skilled in the art of the present invention understand usually.The object of term used in the description of the invention herein just in order to describe concrete embodiment, is not intended to be restriction the present invention.Term as used herein " and/or " comprise arbitrary and all combinations of one or more relevant Listed Items.
As shown in Figures 1 to 4, it is the projector Air Filter blockage detector 10 of a preferred embodiment of the present invention, comprising:
Shell 100, first detector unit 200, second detector unit 300, barrier layer 400 and Air Filter 500, described shell 100 comprises top shell 100A and drain pan 100B, described top shell 100A and drain pan 100B is fastened and connected, interior air channel 110 and outer air duct 120 is provided with in shell 100, described outer air duct 120 is by the ft connection of Air Filter 500 with shell 100, described outer air duct 120 has first passage 121 and second channel 122, described outer air duct 120 is respectively by first passage 121, second channel 122 is communicated with described interior air channel 110, wind wheel 600 is provided with in described first passage 121, described outer air duct 120 carries out air exchange by Air Filter 500 and shell 100 outside, wind wheel 600 is by air channel 110 in the air intake in outer air duct 120, interior air channel 110 also with the ft connection of shell 100, the heater element (not shown) such as bulb are provided with in described interior air channel 110, interior air channel 110 makes the heater elements such as bulb be lowered the temperature by the air that wind wheel 600 is sent into, the air that the heat of the heater elements such as bulb is discharged along with interior air channel 110 and discharging.Such as, some barrier layers 400 are arranged side by side.And for example, described barrier layer 400 protrudes and arranges some obstruct bars, and such as, described obstruct bar is strip, and it has semi-circular cross-section.Preferably, be arranged side by side some barrier layers 400, and the two sides of described barrier layer 400 is protruded and arranged some obstruct bars respectively, the alternate setting of obstruct bar of adjacent barrier layer 400, like this, can obtain good barriering effect.
For strengthening the protection to Air Filter 500; by larger dust or foreign material barrier outside Air Filter 500; as shown in Figure 1; described shell 100 has guard boom 130; described guard boom 130 is arranged at outside described Air Filter 100; guard boom 130 can, effectively by dust barrier larger for volume, prevent Air Filter 500 to be damaged, the chocking-up degree of Air Filter 500 of simultaneously also can releiving.
As shown in Figure 2, described barrier layer 400 is arranged in described second channel 122, such as, described barrier layer 400 is spongy layer, spongy layer has higher density, when wind wheel 600 works, wind wheel 600 can suck air respectively by Air Filter 500 and barrier layer 400, under normal circumstances, because the density of spongy layer is much larger than Air Filter 500, therefore, under wind wheel 600 acts on, the air of outer air duct 120 is sucked by Air Filter 500 and air channel 110 in sending into, and almost do not have air to enter outer air duct 120 by interior air channel 110 from spongy layer, described first detector unit 200 is arranged at described Air Filter 500 side, described second detector unit 300 is arranged at described barrier layer 400 side and described second detector unit 300 is positioned at described outer air duct 120, such as, described second detector unit 300 be arranged at outer air duct 120 and the second detector unit 300 near spongy layer, and for example, also arrange respectively with described first detector unit 200, the control module that described second detector unit 300 connects, whether the difference for the temperature value of the temperature value and the first temperature detecting point that judge the second temperature detecting point is greater than predetermined threshold value, if, then send Air Filter 500 and block prompting.Like this, the temperature that first detector unit 200 detects is the outside temperature being entered the air of outer air duct 120 by Air Filter 500, and the temperature that the second detector unit 300 detects is the temperature of air in outer air duct 120, because the air of spongy layer both sides almost completely cuts off, therefore the temperature that the second detector unit 300 detects affects very little by the hot-air in interior air channel 110, the temperature difference of the second detector unit 300 and the first detector unit 200 is very little, now can judge that Air Filter 500 does not block, when Air Filter 500 blocks, air is more difficult sucks outer air duct 120 by Air Filter 500, now due to the effect of wind wheel 600, as shown in Figure 4, a small amount of hot-air in interior air channel 110 will suck outer air duct 120 by spongy layer, and at this moment, the second detector unit 300 will be subject to the temperature impact of the hot-air in interior air channel 110, the temperature difference of the second detector unit 300 and the first detector unit 200 increases, then can judge that now Air Filter 500 starts blocking, the density blocked along with Air Filter 500 increases, extraneous air enters outer air duct 120 from Air Filter 500 and reduces gradually, and the hot-air that the hot-air in interior air channel 110 enters outer air duct 120 by spongy layer increases, when Air Filter 500 block density to a certain degree time, the temperature that second detector unit 300 detects rises, and the temperature difference between the temperature that detects of the second detector unit 300 and the temperature that detects of the first detector unit 200 is when being greater than predetermined threshold value, then can judge that now Air Filter 500 blocks, then send blocking prompting, to notify user, such as, described shell 100 arranges LED light and control circuit thereof, described control circuit connects described control module, during for sending Air Filter 500 blocking prompting in described control module, control described control circuit, make the luminescence of described LED light or flash of light, block to point out user's Air Filter, need cleaning, preferably, described LED light is arranged at described guard boom 130 place, and such as, described LED light is arranged at the inner side in described guard boom 130 gap, can protect LED light on the one hand, does not affect its indicating effect on the other hand.Preferably, also arrange the thermoelectric conversion device be connected with described control circuit and accumulator, it is electric energy that described thermoelectric conversion device is used for thermal power transfer, and be described charge in batteries, described accumulator is that described LED light is powered by described control circuit.Preferably, described thermoelectric conversion device is arranged at interior air channel, like this, can obtain better thermoelectricity conversion effect, and preferably, described accumulator also connects described first detector unit 200, described second detector unit 300 respectively.Such as, the density of spongy layer is set according to the density of the blocking of Air Filter 500, such as, when the jamming density of Air Filter 500 makes the air themperature in interior air channel 110 rise, when the heater elements such as the bulb in interior air channel 110 cannot dispel the heat in time, the jamming density of Air Filter 500 is now reference density, then the density of spongy layer is set to the density identical with reference density, can in time by the temperature difference feedback between detector unit when Air Filter 500 is blocked.
In one embodiment, for strengthening the obstructing capacity of spongy layer, as Fig. 2, shown in Fig. 4, described spongy layer is set to three layers, in order to adjust the obstructing capacity of spongy layer, the stopping state of Air Filter 500 under adaptation varying environment, such as, described spongy layer is set to detachably, such as, the dust of environment residing for the projector, when foreign material are more, Air Filter 500 blocks speed quickly, for knowing that Air Filter 500 blocks as early as possible, the quantity of spongy layer can be reduced, then when Air Filter 500 starts to block, or Air Filter 500 jamming density less time, the temperature difference checked by the second detector unit 300 and the first detector unit 200 can know Air Filter 500 stopping state immediately, when environment is better described in projector, can arrange two-layer or three layers of spongy layer, in reducing, the hot-air in air channel 110 is on the impact of the second detector unit 300, avoids frequently sending blocking prompting.
For the error of the temperature difference as far as possible between reduction first detector unit 200 and the second detector unit 300, described first detector unit 200 is arranged at inside described Air Filter 500, the temperature that first detector unit 200 detects is the temperature of outer air duct 120 inside, like this, the impact of external temperature on the first detector unit 200 can be reduced, also make the temperature difference of the first detector unit 200 and the second detector unit 300 truer, if the first detector unit 200 is arranged at outside Air Filter 500, then the first detector unit 200 temperature is larger by extraneous thermal effect, the first detector unit 200 and second detector unit 300 temperature difference is easily caused to produce false judgment greatly.
For increasing the suction of wind wheel 600, make the air of outer air duct 120 can be quick, enter interior air channel 110 fully, the exchange heat speed in air channel 110 in accelerating, described wind wheel 600 quantity is set to four, such as, as shown in Figure 1, described wind wheel 600 comprises the first wind wheel 610, second wind wheel 620, 3rd wind wheel 630 and the 4th wind wheel 640, described first wind wheel 610, described second wind wheel 620 and described 3rd wind wheel 630, described 4th wind wheel 640 is vertical, such as, described first wind wheel 610 is arranged at same plane with described second wind wheel 620, such as, described first wind wheel 610 is symmetrical arranged with described second wind wheel 620, and for example, described first wind wheel 610 is arranged with described second wind wheel 620 rotational symmetry, or described first wind wheel 610 is arranged with described second wind wheel 620 Central Symmetry, such as, with described shell 100 place plane for horizontal direction, described first wind wheel 610 and described second wind wheel 620 are horizontally disposed with, described 3rd wind wheel 630 and described 4th wind wheel 640 are vertically arranged, described 3rd wind wheel 630 is arranged side by side with described 4th wind wheel 640, four wind wheel 600 1 aspects effectively strengthen wind wheel 600 suction, accelerate the air circulation in outer air duct 120 and interior air channel 110, on the other hand air is flowed in the horizontal and vertical directions, make air in outer air duct 120 evenly suction in air channel 110, avoid outer air duct 120 air to enter interior air channel 110 unequally, such as, the suction that the suction that the air being positioned at Air Filter 500 annex is subject to receives than the air near spongy layer is greater or lesser, the temperature difference causing the first detector unit 200 and the second detector unit 300 to detect has error, and described first wind wheel 610 and the second wind wheel 620, described 3rd wind wheel 630 and described 4th wind wheel 640 are arranged between the first detector unit 200 and the second detector unit 300, such as, the distance of described first wind wheel 610, described 3rd wind wheel 630 and the first detector unit 200 approximates the distance of described second wind wheel 620, described 4th wind wheel 640 and described second detector unit 300, reduces further because suction reason causes the error of the temperature difference between the first detector unit 200 and the second detector unit 300.
The present invention also provides a kind of projector detecting clogging of dust screen, comprising:
Step S100, obtains the temperature value of the first temperature detecting point near Air Filter;
Step S200, obtains the temperature value of the second temperature detecting point near barrier layer;
Step S300, judges whether the difference of the temperature value of the second temperature detecting point and the temperature value of the first temperature detecting point is greater than predetermined threshold value, if it is sends Air Filter blocking and reminds.
Such as, barrier layer is spongy layer, when Air Filter does not block, hot-air in interior air channel cannot enter outer air duct by barrier layer, the temperature impact of hot-air on the second temperature detecting point is very little, the temperature value of the first temperature detecting point is equal with the temperature value of the second temperature detecting point or close, when Air Filter blocks, Air Filter air inflow reduces, and the wind wheel suction inconvenience of outer air duct, then comparatively speaking, the hot-air in interior air channel enters the air inflow increase of outer air duct, the temperature value of the second temperature detecting point is increased gradually, because the temperature of the first temperature detecting point affects by the hot-air in interior air channel hardly, then the difference of the temperature value of the second temperature detecting point and the first temperature detecting point increases gradually, when described difference is greater than predetermined threshold value, system sends Air Filter blocking and reminds, the sound that such as gives the alarm is reminded, such as reminded by the image of projector, such as reminded by the pilot lamp of projector.
Each technical characteristic of the above embodiment can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, be all considered to be the scope that this instructions is recorded.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be construed as limiting the scope of the patent.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 (10)
1. a projector Air Filter blockage detector, it is characterized in that, comprise shell, first detector unit, second detector unit, barrier layer and Air Filter, interior air channel and outer air duct is provided with in shell, described outer air duct is by the ft connection of Air Filter and shell, described outer air duct has first passage and second channel, described outer air duct is respectively by first passage, second channel is communicated with described interior air channel, wind wheel is provided with in described first passage, described barrier layer is arranged in described second channel, described first detector unit is arranged at described Air Filter side, described second detector unit is arranged at described barrier layer side and described second detector unit is positioned at described outer air duct.
2. projector Air Filter blockage detector according to claim 1, it is characterized in that, described barrier layer is set to spongy layer.
3. projector Air Filter blockage detector according to claim 2, it is characterized in that, described spongy layer is set to three layers.
4. projector Air Filter blockage detector according to claim 1, is characterized in that, described first detector unit is arranged at inside described Air Filter.
5. projector Air Filter blockage detector according to claim 1, is characterized in that, described wind wheel quantity is set to four.
6. projector Air Filter blockage detector according to claim 5, it is characterized in that, described wind wheel comprises the first wind wheel, the second wind wheel, the 3rd wind wheel and the 4th wind wheel, and described first wind wheel, described second wind wheel and described 3rd wind wheel, described 4th wind wheel are vertical.
7. projector Air Filter blockage detector according to claim 6, is characterized in that, described 3rd wind wheel and described 4th wind wheel are arranged side by side.
8. a projector detecting clogging of dust screen, is characterized in that, comprising:
Obtain the temperature value of the first temperature detecting point near Air Filter;
Obtain the temperature value of the second temperature detecting point near spongy layer;
Judge whether the difference of the temperature value of the second temperature detecting point and the temperature value of the first temperature detecting point is greater than predetermined threshold value, if it is send Air Filter blocking and remind.
9. projector detecting clogging of dust screen according to claim 8, is characterized in that, obtains near Air Filter and is positioned at the temperature value of the first temperature detecting point of outer air duct.
10. projector detecting clogging of dust screen according to claim 8, is characterized in that, obtains near spongy layer and is positioned at the temperature value of the second temperature detecting point of outer air duct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510331188.2A CN104914652B (en) | 2015-06-15 | 2015-06-15 | Projector dust screen blockage detection device and detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510331188.2A CN104914652B (en) | 2015-06-15 | 2015-06-15 | Projector dust screen blockage detection device and detection method |
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| CN104914652A true CN104914652A (en) | 2015-09-16 |
| CN104914652B CN104914652B (en) | 2016-11-30 |
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| CN105807089A (en) * | 2016-05-13 | 2016-07-27 | 深圳市毅丰光电科技有限公司 | Projector air speed detection device and projector |
| CN106297205A (en) * | 2016-07-22 | 2017-01-04 | 安徽皖通邮电股份有限公司 | A kind of machine frame detecting clogging of dust screen and detection device |
| WO2017186041A1 (en) * | 2016-04-27 | 2017-11-02 | 深圳市光峰光电技术有限公司 | Projector and method of controlling heat dissipation of projector |
| WO2018090612A1 (en) * | 2016-11-15 | 2018-05-24 | 深圳市光峰光电技术有限公司 | Light source system, projector, and temperature controlling method |
| CN108760812A (en) * | 2018-06-01 | 2018-11-06 | 苏州市东成办公科技有限公司 | A kind of projecting apparatus Air Filter blockage detector |
| CN112684655A (en) * | 2020-12-29 | 2021-04-20 | 成都极米科技股份有限公司 | Impurity cleaning method, device and system for projector and projector |
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| CN108760812A (en) * | 2018-06-01 | 2018-11-06 | 苏州市东成办公科技有限公司 | A kind of projecting apparatus Air Filter blockage detector |
| CN112684655A (en) * | 2020-12-29 | 2021-04-20 | 成都极米科技股份有限公司 | Impurity cleaning method, device and system for projector and projector |
| CN112684655B (en) * | 2020-12-29 | 2022-10-04 | 成都极米科技股份有限公司 | Impurity cleaning method, device and system for projector and projector |
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|---|---|
| CN104914652B (en) | 2016-11-30 |
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Address after: 518000, Guangdong, Longhua province Shenzhen New District big wave office, with Sheng community, Baiyun Mountain village, King Wang plant No. 3, building 1 North, 1 South District Applicant after: Yifeng display technology (Shenzhen) Co., Ltd. Address before: 518000, Guangdong, Longhua Province, Shenzhen New District, big wave street, Sheng community, Baiyun Mountain village, King plant 1, building 1, South District, 1 floor mezzanine, 2 floor, 3 north zone Applicant before: Toshin Technology (Shenzhen) Co. Ltd. |
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Inventor after: Liang Zhiqiang Inventor after: Zeng Wanjun Inventor before: He Ming Inventor before: Zhou Yuqun |
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