CN1225789C - Optical valve heat radiator - Google Patents
Optical valve heat radiator Download PDFInfo
- Publication number
- CN1225789C CN1225789C CN 02160437 CN02160437A CN1225789C CN 1225789 C CN1225789 C CN 1225789C CN 02160437 CN02160437 CN 02160437 CN 02160437 A CN02160437 A CN 02160437A CN 1225789 C CN1225789 C CN 1225789C
- Authority
- CN
- China
- Prior art keywords
- light valve
- fin
- circuit board
- fan
- heat abstractor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000003287 optical effect Effects 0.000 title abstract 5
- 238000005192 partition Methods 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims description 19
- 239000000758 substrate Substances 0.000 claims description 12
- 230000005855 radiation Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The present invention relates to an optical valve heat radiation device. An optical valve and a radiator are respectively arranged on the relative positions of the front surface and the back surface of a circuit board with punch holes; the heat of the optical valve can be directly conducted to the radiator; a fan in the radiator is used to suck air flow which is guided by a partition wall and a streamline flow channel to fully contact fins of the radiator to carry out heat exchange so as to enhance the heat radiation efficiency of the optical valve; heat radiation air is guided to blow and cool the circuit board so as to form a single heat radiation system.
Description
Technical field
The present invention relates to projection display equipment, relate in particular in the projection display equipment in order to cool off the heat abstractor of light valve.
Background technology
In projection display equipment, light valve directly influences projection image's quality, and it is most important projection optics element, and the working temperature of therefore keeping light valve is especially important.As shown in Figure 1, in the known projection display equipment in No. 86113926 patent, light valve 11 is fixed on the printed circuit board (PCB) 12, and, install a heat abstractor 13 at relative printed circuit board (PCB) 12 back sides of light valve 11 positions, heat abstractor 13 is one to have the fin 131 that multiple row is parallel and protrude, by fin 131 heat is conducted to surrounding air, air themperature is risen, form natural convection air and carry out heat exchange, so that cooling light valve 11.This heat abstractor 13 that utilizes heat buoyancy to produce free convection can not active heat removal, so radiating efficiency is not good.
As shown in Figure 2, Fig. 2 is another kind of known light valve heat abstractor, light valve 21 is installed on the circuit board 23 by fixed mount 22, and, install a heat abstractor 24 at circuit board 23 back sides that are oppositely arranged light valve 21 positions, heat abstractor 24 is one to have the fin 241 that multiple row is parallel and protrude, one aerofoil fan 25 is set above fin 241 central authorities, by rotation axis flow fan 25 suction airs, make the air fin 241 of flowing through, to increase the radiating effect of fin 241.Yet, the fin 241 of heat abstractor 24 straight settings does not carry out water conservancy diversion configuration, the air that aerofoil fan 25 is blown out according to air flow line, directly impact fin 241 and, can not fully carry out heat exchange with fin 241 easily by the outflow of fin 241 upper ends.Simultaneously, air stream also easily causes sinuous flow and forms loss.In addition, because aerofoil fan 25 center motor are arranged on heat abstractor 24 central authorities, just be positioned at the position that light valve 21 produces thermal source, heat can not be taken away rapidly by fin, causes improving radiating efficiency, influences the running quality of light valve.
Summary of the invention
An object of the present invention is to provide a kind of light valve heat abstractor, utilize the fin and the dividing plate of streamlined configuration, the guiding air flows reduces the sinuous flow loss, increases the radiating efficiency of fin.
Another object of the present invention is to provide a kind of light valve heat abstractor, cooperate fin to form runner, make air and fin sufficient heat exchange, improve radiating efficiency, and reduce fan noise with outer cover.
A further object of the present invention is to provide a kind of light valve heat abstractor, by the arrangement of heat abstractor and circuit board, simplifies the light valve heat abstractor, and makes air stream take away the heat that the light valve thermal source is produced rapidly, keeps the suitable working temperature of light valve.
Another purpose of the present invention is to provide a kind of light valve heat abstractor, so that the air that cold sink is discharged directly cools off the various electronic components on the light valve circuit board, does not need other system fan to cool off, and makes the integral heat sink framework be easier to planning.
For achieving the above object, the invention provides a kind of light valve heat abstractor, comprising: a circuit board; One light valve is arranged on the circuit board front surface, and described circuit board is established a perforation in the back side of light valve central authorities, and a cooling pad is established over against described perforation in the described light valve back side; And a radiator, being arranged on the circuit board rear surface of relative light valve position, its central authorities are provided with a fan, have the multiple row fin around the fan, and a side fin forms streamline channel, guiding air cooling circuit board.
In the present invention, described radiator has a substrate, and fin and fan are located on the substrate front, and the back side has a projection by described perforation, connects and the support cooling pad.
In the present invention, described runner is to cover the fin upper end by an outer cover to be formed.
In the present invention, described runner is near fan end, and bent fin forms streamlined.
In the present invention, be provided with partition wall between the fin of described fan and relative runner opposite side.
In the present invention, described fan is located in the fin of relative runner opposite side.
The present invention is located at light valve and radiator respectively on the relative position on two surfaces, circuit board front and back with perforation.The substrate of radiator is contacted with light valve through perforation, make the heat of light valve be directly conducted to radiator, utilize the fan suction air flow of radiator, via partition wall and streamline channel guiding, fully contact with fin and to carry out heat exchange, improving the light valve radiating efficiency, and the heat radiation air of leading the way blows to and cooling circuit board again, thereby constitutes single cooling system.
Description of drawings
Fig. 1 shows the outside drawing of the light valve heat abstractor of No. 86113926 patent case;
Fig. 2 shows the exploded view of another known light valve heat abstractor;
Fig. 3 shows the exploded view of light valve heat abstractor of the present invention;
Fig. 4 A shows the vertical view of light valve heat abstractor of the present invention;
Fig. 4 B shows the side sectional view of light valve heat abstractor of the present invention;
Fig. 5 shows the temperature experiment data of light valve heat abstractor of the present invention.
Embodiment
For achieving the above object, the technology used in the present invention means and effect thereof are now lifted a preferred embodiment, and conjunction with figs. is illustrated as follows.
Consult Fig. 3, the light valve heat abstractor of the embodiment of the invention mainly comprises a light valve 31, a circuit board 32 and a radiator 33.Light valve 31 and radiator 33 are located at respectively on the relative position on two surfaces, circuit board 32 front and back, are constituted the light valve heat abstractor.
Wherein, an end of circuit board 32 has a square perforation 321, and four jiaos of perforation 321 are respectively equipped with a fixing hole 322.One light valve 31 places a fixed mount 34, and utilizes the steady pin 341 on fixed mount 34 1 diagonal angles, penetrates in the relatively-stationary hole 322, and light valve 31 is fixed on circuit board 32 front surfaces.Between light valve 31 and the circuit board 32, add a cooling pad 35, cooling pad 35 covers perforation 321, to disperse the thermal source of light valve 31.
In addition, the rear surface of circuit board 32 is provided with a radiator 33 on relative light valve 31 positions, radiator 33 has a substrate 331, substrate 331 back side projections, one projections 332 (with reference to Fig. 4 B), it can connect perforation 321, connect and support cooling pad 35, substrate 331 fronts and one fan 36 is set in circuit board 32 outer ends, on the substrate 331 around the fan 36, be convexly equipped with multiple row fin 333, thereby can reduce the thickness of radiator 33, wherein the outer fin 3331 of each row of circuit board 32 outer ends is arranged in parallel, and fan 36 and outside 3331 formation partition walls 334 of fin, fin 3332 almost parallel settings in each row of circuit board 32 inboards in addition, but near fan 36 end limits, 3332 of interior fin cooperate air stream to form the streamline shape, its upper end covers with outer cover 37, makes outer cover 37 and interior fin 3332 constitute a plurality of guiding air flow channels 335.
Shown in Fig. 4 A and 4B, light valve heat abstractor of the present invention, it is the heat that is produced by light valve 31, reach the circuit board 32 and the cooling pad 35 at light valve 31 back sides, be directed to substrate 331 central authorities again via projection 332, follow heat diffusion to whole base plate 331, fan 36 suction airs that radiator 33 is provided with by side, make directly contact substrate 331 central authorities of air, at first cool off the cooling pad 35 of main heat accumulation, cooled air pushes through fan 36, adds the obstruct of partition wall 334 and the guiding of streamlined interior fin 3332, not only can reduce wind loss, also can make more air enter runner 335, fully contact with interior fin 3332 and carry out heat exchange, the heat that allows substrate 331 absorb from circuit board 32 and cooling pad 35, be able to take out of rapidly, to improve the light valve radiating efficiency by air.In addition, guiding by runner 335, make the heat radiation air that flows out runner 355, blow to the electronic component on the circuit board 32, further these electronic components of cooling make full use of air cooling efficient, constitute single cooling system, need not other cooling systems and further cool off, just can make projection display equipment integral heat sink smoothness and be easier to planning.
In addition, the outer fin 3331 of each row by circuit board 32 outer ends, owing to connect shell or the blind end or the air inlet etc. (not shown) of nearly projector, the adverse current of formation and fan 36 air reverses causes windage loss easily, and therefore an end of outer fin 3331 utilizes partition wall 334 sealings to reduce windage loss, and the fan 36 that side of the present invention is provided with, make outer fin 3331 have less area, these outer fin 3331 are kept original heat loss through convection form, assist heat radiation.Because the configuration of heat abstractor of the present invention increases the radiating efficiency of light valve 31, appropriateness reduces the rotating speed of fan 36, also can keep light valve 31 and be in normal working temperature, thereby reduce the noise of fan 36.
Shown in Fig. 4 B, the radiating effect of heat abstractor of the present invention and known heat abstractor relatively, respectively at test point, be near the back side C of circuit board 32 31 liang of front side edge A of light valve and B and light valve 31 centers, with 200W and two kinds of bulb illuminations carrying out of 250W temperature test, thermograph as shown in Figure 5, test point A, B, C temperature all have reduction, especially in the temperature at circuit board 32 back sides, place, light valve 31 center, reduce to 42.4 ℃ and 46.0 ℃ respectively, quite significantly improvement of radiating effect acquisition of the present invention from 49.8 ℃ and 56.2 ℃.
The above only is for ease of preferred embodiment of the present invention is described, scope of the present invention is not limited to preferred embodiment, and is all according to any change that the present invention did, and do not breaking away under the essence of the present invention, all belongs to claim scope of the present invention.
Claims (6)
1. light valve heat abstractor comprises:
One circuit board;
One light valve is arranged on the circuit board front surface, and described circuit board is established a perforation in the back side of light valve central authorities, and a cooling pad is established over against described perforation in the described light valve back side; And
One radiator is arranged on the circuit board rear surface of relative light valve position, and its central authorities are provided with a fan, has the multiple row fin around the fan, and a side fin forms streamline channel, guiding air cooling circuit board.
2. according to the described light valve heat abstractor of claim 1, wherein said radiator has a substrate, and fin and fan are located on the substrate front, and the back side has a projection by described perforation, connects and the support cooling pad.
3. according to the described light valve heat abstractor of claim 1, wherein said runner is to cover the fin upper end by an outer cover to be formed.
4. according to the described light valve heat abstractor of claim 1, wherein said runner is near fan end, and bent fin forms streamlined.
5. according to the described light valve heat abstractor of claim 1, be provided with partition wall between the fin of wherein said fan and relative runner opposite side.
6. according to the described light valve heat abstractor of claim 1, wherein said fan is located in the fin of relative runner opposite side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02160437 CN1225789C (en) | 2002-12-30 | 2002-12-30 | Optical valve heat radiator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02160437 CN1225789C (en) | 2002-12-30 | 2002-12-30 | Optical valve heat radiator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1512572A CN1512572A (en) | 2004-07-14 |
| CN1225789C true CN1225789C (en) | 2005-11-02 |
Family
ID=34237880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02160437 Expired - Fee Related CN1225789C (en) | 2002-12-30 | 2002-12-30 | Optical valve heat radiator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1225789C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101329005B (en) * | 2007-06-20 | 2011-12-14 | 慈佑医学科技股份有限公司 | Electromagnetic valve two-in-one flow guiding and fixing structure of oxygen generator |
| CN102595767B (en) * | 2011-01-13 | 2015-07-22 | 钰桥半导体股份有限公司 | Circuit board structure of mobile electronic product and manufacturing method thereof |
| CN106304800B (en) * | 2016-09-30 | 2018-12-28 | 国网浙江永康市供电公司 | Security warning tool |
| CN108831664B (en) * | 2018-05-17 | 2020-07-17 | 清华大学 | Pressure stabilizer with energy conversion function for low-temperature compressed gas cavity |
| CN110224158B (en) * | 2019-05-14 | 2024-08-20 | 中车青岛四方机车车辆股份有限公司 | High-speed maglev train power supply battery and power supply system |
-
2002
- 2002-12-30 CN CN 02160437 patent/CN1225789C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1512572A (en) | 2004-07-14 |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |