CN101227812B - Cooling device - Google Patents
Cooling device Download PDFInfo
- Publication number
- CN101227812B CN101227812B CN2008100017435A CN200810001743A CN101227812B CN 101227812 B CN101227812 B CN 101227812B CN 2008100017435 A CN2008100017435 A CN 2008100017435A CN 200810001743 A CN200810001743 A CN 200810001743A CN 101227812 B CN101227812 B CN 101227812B
- Authority
- CN
- China
- Prior art keywords
- air
- cooling
- heat
- liquid crystal
- temperature
- 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
- 238000001816 cooling Methods 0.000 title claims abstract description 142
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 104
- 239000007921 spray Substances 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims description 61
- 239000002826 coolant Substances 0.000 claims description 51
- 238000002347 injection Methods 0.000 claims description 29
- 239000007924 injection Substances 0.000 claims description 29
- 238000010521 absorption reaction Methods 0.000 claims description 14
- 230000033228 biological regulation Effects 0.000 claims description 7
- 230000005855 radiation Effects 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 2
- 230000001360 synchronised effect Effects 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 abstract description 27
- 230000005540 biological transmission Effects 0.000 abstract description 14
- 239000000428 dust Substances 0.000 abstract description 9
- 230000004087 circulation Effects 0.000 description 24
- 230000003287 optical effect Effects 0.000 description 19
- 238000000034 method Methods 0.000 description 10
- 230000015572 biosynthetic process Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000007639 printing Methods 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 230000006866 deterioration Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000004020 conductor Substances 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 230000031700 light absorption Effects 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 238000005267 amalgamation Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000036760 body temperature Effects 0.000 description 1
- 239000013065 commercial product Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- KPHWPUGNDIVLNH-UHFFFAOYSA-M diclofenac sodium Chemical compound [Na+].[O-]C(=O)CC1=CC=CC=C1NC1=C(Cl)C=CC=C1Cl KPHWPUGNDIVLNH-UHFFFAOYSA-M 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000009182 swimming Effects 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Landscapes
- Projection Apparatus (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Liquid Crystal (AREA)
Abstract
The invention provides a cooling device for cooling the liquid crystal panel after processing the special sundries and dust generated by light transmission in the liquid crystal displaying device. For heat generated by the liquid crystal panel and polarized light plate due to light source, a first cooling module uses the air in the liquid crystal displaying device flowing and isolated from the outside as cooling air to cool the liquid crystal panel as heating unit or the polarized light plate and a second cooling module sprays the heating unit to absorb the heat, therefore the heating unit is cooled.
Description
Technical field
The present invention relates to the cooling of high-temperature body in the electronic equipment, particularly liquid crystal panel etc. and use light valve component, the cooling technology of liquid crystal panel in the electronic equipments such as liquid crystal display of enlarging projection on screen and information such as display image and Polarizer etc.
Background technology
A kind of liquid crystal projection apparatus as liquid crystal display has the liquid crystal panel as light valve, and modulation projects on the screen image information on the liquid crystal panel and demonstration from the light of light source.Owing to be such structure; In liquid crystal projection apparatus; Be used for projected image information from the light of light source because through the liquid crystal layer of liquid crystal panel by light absorption; And among the black film (Blackmask) of the unwanted light source of shielding waits also by light absorption because such light absorption, the rising of liquid crystal panel temperature.In addition, be configured in the Polarizer absorption of liquid crystal panel front and back from the light that does not have the regulation polarizing axis in the light of light source.The heat that is accumulated in the Polarizer is delivered to liquid crystal panel, causes that the temperature of liquid crystal panel rises.
The reliability reduction that the temperature of excessive liquid crystal panel rises and causes liquid crystal panel; So with carry out likewise in other electronic equipment; In liquid crystal projection apparatus; The method for air-cooling that uses the interior fan of the equipment that is arranged on to obtain extraneous air and blow carries out the cooling of liquid crystal panel and Polarizer.
In recent years, owing to the variation of the behaviour in service of liquid crystal display requires the high brightnessization of display frame, thereby the light of liquid crystal panel that shines this liquid crystal display is stronger.On the other hand, the requirement that product is more cheap on the market is also stronger, the more and more miniaturization of the liquid crystal panel of use.Comprehensive these factors, what become liquid crystal panel adds the very large situation of heat density.The temperature of liquid crystal panel rises like this, makes the quality badness of liquid crystal panel also quicken, and becomes the problem of the life of product of liquid crystal display, corresponding cooling power that cooling device also is asked to improve and temperature rises.
In addition; The light of irradiating liquid crystal display device etc. also amplifies the display device of projection; Remain with foreign material and dust if in equipment, attract; Then be shown, cause the image quality deterioration, so the cooling means of expectation heater is the cooling means that does not circulate mutually with air outside owing to projection light makes them.
As seeking to tackle foreign material and dust, and improve the method for cooling power, the liquid cooling mode that liquid cooling medium is set that patent documentation 1 is put down in writing is being carried out various discussions.Such cooling device; Having the heating part of liquid cooling medium to connect airtight inclosure is configured between liquid crystal panel and the Polarizer; Make the heat that is accumulated on liquid crystal panel and the Polarizer be delivered to the heating part that circulation has liquid cooling medium; Liquid cooling medium after will being heated through the liquid pump is transferred to and is configured in the locational heating radiator that leaves, and dispels the heat through this heating radiator.This liquid cooling medium circulates between heating part and heating radiator through the liquid pump, improves cooling power through the optimal heat swap status of setting the heat handover.
In addition, in the cooling device of patent documentation 2 record, configuration having the heating part of the stream of circulation cooling heat eliminating medium, and it is only connected airtight with the neighboring area except that the light transmissive region of the liquid crystal panel assembly of light source irradiation.The heat that liquid crystal panel is accumulated is delivered at liquid crystal panel periphery round-robin cooling heat eliminating medium; Cooling heat eliminating medium after will being heated through pump is transferred to and is configured in the locational heat-sink unit that leaves; Dispel the heat by heat-sink unit; The cooling heat eliminating medium is not directly accepted the irradiation of light, has avoided the influence to the projection image quality.
And then, when sneaking into foreign material and the dust of liquid crystal display as blocking, the method for the high-temperature body of liquid coolant crystal panel etc., the cooling device that has patent documentation 3 to be put down in writing.This cooling device makes liquid crystal indicator be in airtight conditions through framework, after the temporary transient compression of the air in the framework, sprays towards high-temperature body through nozzle.Through from this nozzle because the airflow cooling down high-temperature body that adiabatic expansion and temperature reduce.At this moment, the temperature that causes during compression rises and is dispelled the heat in extraneous air by the heat radiator outside and that contact with the outside that is arranged on compression set.
Here, the refrigerating module that patent documentation 4 is put down in writing does not relate to the example of the cooling device of liquid crystal indicator, the cooling device that is and cools off with two different refrigerating modules.This cooling device is provided with through heat eliminating medium and accepts the heat of heater and carry out the cooling recirculation system that heat transfers and make through after the compressor compresses; The heat eliminating medium round-robin cooling recirculation system that adiabatic expansion and temperature reduce; Be to accept the heat of heater and carry out the heat handover by the former cooling system; By another cooling system hot tie-in of the latter and absorb the heat of this heat eliminating medium, the cooling system that in the latter's the circulation system, dispels the heat.
The problem that must solve below in the above-mentioned patent documentation of enumerating, existing.
In the cooling device of patent documentation 1 record,,, then be created in the new problem of throwing the image that bubble or dust are arranged in the image if liquid cooling medium is sneaked into bubble or dust owing to light transmission liquid cooling medium from light source irradiation.In addition; If produce temperature difference in the liquid cooling medium, then because the convection current in the liquid cooling medium etc. cause the problem that flating takes place, and; Liquid cooling medium goes bad because of the light from light source irradiation; Cause the deterioration of quality, cause light the transmitance of liquid crystal panel to be reduced the problem that the illumination of image reduces.
In the cooling device of patent documentation 2 records; Avoiding from the zone in the zone that light saw through of light source irradiation; Make the cooling heat eliminating medium circulation of liquid crystal panel etc. and cool off; So can avoid because the influence of light and in the cooling heat eliminating medium, produce the problem of patent documentation 1, but the heat of cooling off liquid crystal panel that heat eliminating medium must be efficiently produces the light from light source irradiation and Polarizer is to the periphery transmission.Thus, aspect the heat transmission, use that light transmission rate is good, the high high printing opacity of temperature conductivity (coefficient of thermal conductivity), high heat conducting material.But reality is, so high printing opacity, high thermal conducting material are limited materials, and price is high, and this becomes the problem of commercial product cost aspect.In addition, because the heat-sink unit inhaled air is brought foreign material and dust into, so the liquid crystal indicator that has will be provided with dustproof glass etc. at the surface element of high heat conducting material and liquid crystal panel.
In the cooling device of patent documentation 3 record, the compressive state that the pressure and temperature of the air that ejects can be through the control compressor and controlling, but need the such large-scale plant of compressor.And the air quenching that adiabatic expansion causes makes the airborne moisture content liquefaction in the equipment, if these water droplets then cause the deterioration of image attached on the liquid crystal panel etc.In addition, the airflow injection cycle of compressor etc. causes the cyclical swing of temperature, and this cycle also possibly exert an influence to image.
In order on electronic equipment, to load and unload cooling device, the cooling device of patent documentation 4 records independently is provided with electronic equipment and cooling device, improves the operability of loading and unloading.But; Can not load and unload cooling device require sealing electronic equipment etc. among; Make any one to become the state that can a kind of cooling means cools off, independently two cooling recirculation systems all will be set, make the mutual hot tie-in of cooling recirculation system; Can only be to carry out the combination that heat is transmitted indirectly, have the tediously long property of cooling device.
[patent documentation 1] japanese patent laid-open 1-159684 communique
[patent documentation 2] Japanese Patent Laid is opened the 2005-275189 communique
[patent documentation 3] Japanese Patent Laid is opened the 2005-148624 communique
[patent documentation 4] Japanese Patent Laid is opened the 2004-319628 communique
Summary of the invention
Cooling device of the present invention constitutes, and possesses: first refrigerating module of the high-temperature body through the round-robin first heat eliminating medium cooling electronic apparatus; Cool off second refrigerating module of above-mentioned first heat eliminating medium through round-robin second heat eliminating medium; With above-mentioned first heat eliminating medium of driving and heat eliminating medium driver module of the above-mentioned second heat eliminating medium round-robin.
In addition, cooling device of the present invention constitutes, and possesses: the heat eliminating medium drive division comprises first pump chamber and suction that sucks and discharge air and second pump chamber of discharging liquid coolant, first pump chamber and second pump chamber interlock action; The air cooling module; Comprise: to the nozzle of liquid crystal panel or Polarizer ejection cooling air with flow into the above-mentioned cooling air that sucks and discharge through above-mentioned first pump chamber and cool off above-mentioned cooling air; Go out the heat exchange department of chilled cooling air simultaneously to above-mentioned nozzle flow, this air cooling module is arranged at airtight inside of the electronic equipment that is built-in with liquid crystal panel and Polarizer; With the liquid cooling module, comprising: through the portion of being heated of cooling off above-mentioned heat exchange department by the liquid coolant of above-mentioned second pump chamber suction and discharge; Carry out heat radiation, be arranged at the radiating part of above-mentioned airtight outside simultaneously by the liquid coolant after the heat absorption of the above-mentioned portion of being heated; With so that liquid coolant round-robin mode in above-mentioned second pump chamber, above-mentioned be heated portion and above-mentioned radiating part is connected and the pipeline of the above-mentioned liquid coolant that circulates.
According to cooling device of the present invention, can provide internal part not have the high electronic equipments such as liquid crystal display of temperature deterioration, reliability and image quality.
Description of drawings
Fig. 1 is to use the summary pie graph of liquid crystal display of the cooling device of embodiments of the invention.
Fig. 2 is the key diagram of state of temperature of cooling of the cooling device of embodiments of the invention.
Fig. 3 is the synoptic diagram of relation of caloric receptivity of flow and the heat eliminating medium of expression heat eliminating medium.
Fig. 4 is the synoptic diagram of heat interchange state of the cooling of explanation embodiments of the invention.
Fig. 5 is the synoptic diagram of the physical characteristic value of expression air and water.
Embodiment
Below the embodiment that present invention will be described in detail with reference to the accompanying.
Fig. 1 is the summary pie graph with the liquid crystal display of the cooling device of model representation use embodiments of the invention.The parts that are cooled of liquid crystal indicator are by light-struck liquid crystal panel etc., and the cooling device of embodiments of the invention preferably solves the distinctive cooling problem of liquid crystal panel of printing opacity.In addition, be not limited to liquid crystal indicator, also effective in requiring other electronic equipment that completely cuts off with extraneous air.
At first, with reference to Fig. 1 the function of the optical unit 3 that forms image information and the summary of formation are described.Optical unit 3 is to be used for the light that penetrates from light source is carried out optical processing, in optical imagery, forms the works of image information, is made up of lamp optical system 31, color separation optical system 32, optical transform component 33, look combining optical 34 etc.
Lamp optical system 31 constitutes, and by be reflected device 312 reflections and penetrate as directional light of the light of light source 311 irradiation, separates into the light of a plurality of parts through the lens arra 313 that is made up of the lenslet group, by overlapping lens 314 after form images on the liquid crystal panel stated.
Color separation optical system 32 has following function: make dichronic mirror 321 (the blue separation), 322 (green, red separation) and the reflecting part reflection of light mirror 323,324,325 of the light transmission reflection of a plurality of parts that penetrate from lamp optical system 31 light separated into the coloured light of red, green, blue three looks.
Red, green, blue three coloured light that separate by color separation optical system 32 project each optical transform component 33 after state the liquid crystal panel that each coloured light is used.
Light incident side Polarizer 331R (G, B) and emitting side Polarizer 333R (G, B) are in the position configuration that clips liquid crystal panel 332R (G, B), and these three groups of parts constitute optical transform components 33.Polarization direction is aligned to roughly unidirectional each coloured light and incides each incident Polarizer 331 (R, G, B), but only passes through with the roughly unidirectional polarized light of the polarizing axis of light, and other light is absorbed.From the light that liquid crystal panel 332 (R, G, B) penetrates, only have each the exiting side Polarizer 333 of light transmission (R, G, B) of parallel polarizing axis that sees through with light through light incident side Polarizer 331 (R, G, B), other light is absorbed.Therefore, light incident side Polarizer 331 (R, G, B) and emitting side Polarizer 333 (R, G, B) rise because of this absorbing light temperature.Particularly emitting side Polarizer amount of stored heat is big.
Be used for by each liquid crystal panel 332 (R, G, B) modulation, the image information of each coloured light that penetrates from each emitting side Polarizer 333 (R, G, B) is synthesized, and forms four right-angle prisms of coloured image, amalgamation quality combining optical 34.
Projection lens 4 is formed by a plurality of combination of lensess, will be amplified by the coloured image that look combining optical 34 forms to project on the screen.
In above-mentioned liquid crystal display 1, for example, have the light because of light source is caused the cooling device 5 that Polarizer 331 (R, G, B), 333 (R, G, B) and liquid crystal panel 332 (R, G, B) that temperature rises cool off.
The basic comprising of the cooling device 5 of this liquid crystal display 1 is described with reference to Fig. 1.
At first, compare big different character with the cooling device of existing electronic equipment in the embodiments of the invention and be, drive use and the cooled body of two kinds of heat eliminating mediums driving through this pump of the pump of two kinds of heat eliminating mediums.Pump 51 is as turbulence type pump, the pump chamber of a turbulence pump 51 is divided into first pump chamber 511 and second pump chamber 512, and constitutes two independently pump streams.The first-class first-class outlet 515 and the second outflow crossing 516 of going into crossing 513 and the second inflow crossing 514, heat eliminating medium that is respectively arranged with heat eliminating medium in first pump chamber 511 and second pump chamber 512.
The heat eliminating medium of two refrigerating modules is driven by pump chamber separately.Making heat eliminating medium round-robin cooling system by first pump chamber 511 of turbulence pump 51 is to connect heating parts 52, thermal component 53 and liquid bath 54 and first refrigerating module that constitutes by a plurality of pipe arrangements 551 circulations.In addition; The cooling system of transferring heat eliminating medium by second pump chamber 512 of turbulence pump 51 is second refrigerating module; Be made up of air heat exchange parts 56 that connect through pipe arrangement 552 and the jet module with nozzle sets 57, wherein nozzle sets 57 comprises the control assembly of the heat eliminating medium that injection is transferred.
The cooled body of the liquid crystal display 1 of embodiments of the invention is three groups of liquid crystal panels 332 (R, G, B) and Polarizer 331 (R, G, B), 333 (R, G, B) parts of printing opacity.The cooling device 5 that cools off this liquid crystal panel etc. adopts directly the type of cooling to the plane injection low temperature wind of liquid crystal panel and Polarizer, the problem that has produced when having eliminated light transmission part such as liquid coolant crystal panel in the liquid cooling mode.
As shown in Figure 1, as cooled body owing to have liquid crystal panel 332 (R, G, B) and Polarizer 331 (R, G, B), 333 (R, G, the B) of three coloured light, so the cooling device 5 of embodiments of the invention has three groups of nozzles 57 at least.When carrying out the cooling of other heat-generating electronic part in the liquid crystal display 1, as required, dispose relatively, can cool off equally with nozzle 57 and as the cooled body that cools off object.
The formation and the movement content of first refrigerating module and second refrigerating module are described here.At first, explain as the formation of second refrigerating module that the liquid crystal panel 332 of direct cooling object, Polarizer 331,333 etc. are cooled off and the injection method of air with reference to Fig. 1.
Make the air heat eliminating medium action of injection through second pump chamber 512 of turbulence pump 51.Promptly; From being arranged at the second inflow crossing 514 of second pump chamber 512; Isolated airtight liquid crystal display 1 inner air with external ventilation is flowed into, the second outflow crossing 516 through turbulence pump 51 with displace air to the air heat exchange parts 56 that connect by second pipe arrangement 552.In air heat exchange parts 56 inside, in order by the circulation of air transferred the time, to guarantee that the area that contact with air is big, seek heat interchange, formation has the stream (not shown) of fin shape etc.After the air transferred is in being stranded in air heat exchange parts 56, sprayed to cooled body by nozzle 57.
Here, explanation cooling down high-temperature body 332,331, the 333 (temperature: the formation of the injection wind of low temperature in the time of Th) (T2) that see figures.1.and.2.Fig. 2 is the synoptic diagram of thermal conversion state of the cooling device of expression embodiments of the invention.
The air that attract in the air heat exchange parts 56 are the air in the airtight liquid crystal display 1, and are preferred aspect isolated outside foreign material and dust, be to high-temperature body 332,331,333 (temperature: Th) spray and absorb heat after (temperature: air Tc).The heat of the air after this heat absorption (temperature: dispelled the heat by framework 2 thermal diffusions such as grade when Tc) swimming in liquid crystal display 1 inside; Become low temperature (T1) slightly; But other heater etc. is also possessed in the inside of liquid crystal display 1; If the air heat that absorbs is not emitted fully, then air still with heat absorption after the close state of temperature of temperature (Tc).The air of the state after this heat absorption (temperature: even Tc) be injected into cooled body 331,332,333 (temperature T h), because the condition of high temperature of cooled body can not be by abundant cooling, so must make the air of injection become low temperature (temperature: injection wind T2).
The formation of low temperature (T2) air that sprays is described.Air heat exchange parts 56 with after heating part 52 hot tie-ins of first refrigerating module stated.Air in the framework 2 is inhaled into this air heat exchange parts 56, the heat of the air of circulation (temperature: T1) be heated by the liquid cooling medium at heating part 52 internal circulations, thereby form low temperature (T2) wind.Be trapped in the air heat exchange parts 56, the air of the low temperature (T2) of cooling by spray control gear from nozzle 57 continuously or with have specified period off and on to high-temperature body 332,331,333 (temperature: Th) spray, thereby (temperature: Tc) such as liquid coolant crystal panel 332 and Polarizer 331,333.Circulation below repeating: (temperature: air Tc) swims in liquid crystal display 1 once more from high-temperature body 332,331,333 heat absorption backs; (temperature: T1) such as heat radiation such as framework 2 grades through liquid crystal display 1; Sucked by the second inflow crossing 514 of turbulence pump 51 once more simultaneously; By circulation in the heating part 52 of first refrigerating module heat eliminating medium liquid be heated, become low temperature (T2) wind, spray by nozzle 57.
Here, explain at first in order from the thermal conversion that begins with the near part of cooled body.The cooling of liquid crystal panel 332 and Polarizer 331,332 is shifted the heat interchange of being carried out through air and heat from the heat transmission at the interface of cooled body and air heat eliminating medium and is carried out.For these heat interchange are described, in Fig. 5 expression relate to heat interchange of the present invention air physical property characteristic with make comparisons as the water of general liquid cooling medium.
At first, the received heat Ws of the air heat eliminating medium at the interface of cooled body and air representes with following formula:
Ws=(coefficient of overall heat transmission) * (temperature difference) * (contact area) ... (1)
Here, the coefficient of overall heat transmission (heat transfer coefficient) is the function relevant with temperature conductivity with the Prandtl constant, and changes according to the flow velocity of heat eliminating medium, and usually, the ratio of liquid cooling medium and air heat eliminating medium is approximately about 20 times.That is, make the air heat eliminating medium obtain the cooling result with the uniform temp of liquid cooling medium cooling, must the contact area of liquid crystal panel and Polarizer etc. and air be enlarged about about 20 times at least.
Liquid crystal panel and Polarizer optically are configured to optimum condition, and being difficult to be configured to separately whole has the heating part of liquid cooling medium contact with circulation, so the necessary heating part that disposes between liquid crystal panel 332 and the emitting side Polarizer 333.Therefore, in utilizing the type of cooling of liquid cooling medium, only on limited contact area, carry out heat transmission.
Relative therewith, in the cooling means of injection air heat eliminating medium, liquid crystal panel 332 and Polarizer 331,333 configuration separately will be provided with the gap of negotiable air, make at separately two plane injection air heat eliminating mediums.This means the contact area of easy increase and heat eliminating medium,, can enlarge about about 6 times as an example.And then, constitute on the installing component of liquid crystal panel 332 and Polarizer 331,333 cooling fin part with the contact area about 3～4 times is set.
Known by above, realize easily making contact area with the air heat eliminating medium to expand about about 20 times with the contact area of the heating part of water-cooling pattern to, the air heat eliminating medium also can be guaranteed and the identical transmission heat of heat transmission to liquid cooling medium.
The caloric receptivity Wt that then explanation heat is transferred.The caloric receptivity Wt that the heat of air heat eliminating medium transmits is not with the following formula table
Wt=(density) * (specific heat) * (flow) * (temperature difference) ... (2)
Here; As shown in Figure 5; The density of liquid cooling medium and air heat eliminating medium is 1: 0.00129; Specific heat is 1: 0.24, thus if when utilizing the pump of the cooling driveability of liquid cooling medium to come the flow of driven air heat eliminating medium identical with temperature difference, then the heat of air heat eliminating medium handover performance be liquid cooling medium caloric receptivity Wt about 1/3200.
Therefore, in order to obtain necessary heat (Wt), must significantly increase the air mass flow of injection at injection low temperature (T2) wind and in the chilling temperature (Tc) that is cooled to working.
Here; Owing to can realize that the heat of the big more absorption of temperature difference (Δ T) is many more; So the air that sprays through nozzle 57 is compared with the air of temperature (T1) state after being dispelled the heat by the thermal diffusion of framework 2 grades, cools off and spray the air that becomes low temperature (T2) through the liquid cooling medium by first refrigerating module; As above-mentioned, the heat that absorbs from high-temperature body is increased.Explanation is used for making the air that will spray become first refrigerating module of low temperature (T2) at these air exchange parts 56 below.
Utilize the first pipe arrangement group 551 that first pump chamber 511, heating part 52, thermal component 53 and the liquid bath 54 of turbulence pump 51 are become to close the circulation stream and constitute first refrigerating module, it is the device of in closing the circulation stream, transferring liquid cooling medium and carrying out heat interchange through two heat exchangers (heating part 52, thermal component 53).As stated, heating part 52 has the circulation flow path of internal circulation liquid cooling medium, with 56 hot tie-ins of air heat exchange parts.
Though the air of transferring in the air heat exchange parts 56 during being stranded in liquid crystal display 1 during heat radiation, the heat of not emitted fully is heated the liquid cooling medium that in heating part 52, circulates, and becomes low temperature wind (T2).On the other hand, the liquid cooling medium that is heated (temperature: T2) transferred, and be transplanted on thermal component 53 through the pipe arrangement 551 that is connected with first pump chamber 511 of turbulence pump 51.
Here; Thermal component 53 is installed in the outside of the framework 2 of liquid crystal display 1; The heat of the liquid cooling medium after being heated (T2) is through being installed in the outside fan (not shown) of framework etc., the outside and the extraneous air of framework 2 (temperature: Ta) ventilation and cooling off, outside framework 2, dispel the heat.Heat eliminating medium liquid after the heat radiation (temperature: Ta) circulation in pipe arrangement 551, to heating part 52 circulations.
That is, through the turbulence pump 51 as a heat eliminating medium driver part, circulation drives heat eliminating medium separately in the refrigerating module of two systems.In addition, through making up, bring into play each refrigerating module both sides's strong point, realization is used for the cooling device 5 of the distinctive cooling cooled body of liquid crystal indicator 1 thus.
Next, the state of the cooling of embodiments of the invention is described with reference to Fig. 3 and Fig. 4.Fig. 3 is the synoptic diagram with the relation of the caloric receptivity of the flow of model representation heat eliminating medium and heat eliminating medium.Family curve shown in Figure 3 only representes it is qualitative representation, and simultaneously, shown in above-mentioned (2 formula), the flow of heat eliminating medium (Q) is a proportionate relationship with the relation of caloric receptivity (W).
In addition; Pump 54 as the heat eliminating medium that drives embodiments of the invention; Owing to be divided into first pump chamber 511 and second pump chamber 512 by two; When pump is shaped as when equating, with respect to the flow (Q1) of the turbulence pump of the not divided stream of original pump chamber, the flow of driven heat eliminating medium liquid reduces by half approximately and is (1/2Q1) in each pump chamber
Therefore, under the situation that the heat eliminating medium amount (1/2Q1) that a pump chamber circulation is only arranged is cooled off from cooled body (liquid crystal panel or air) heat absorption, the heat that can absorb becomes cooling Jie and measures the W1=1/2W1 (b point) of minimizing.Can not obtain the necessary caloric receptivity W1 of work chilling temperature (Tc) (a point) that cooled body temperature (Th) is cooled to stipulate.In order to make cooled body (Th) become work chilling temperature (Tc), absorb and the residual quantity of caloric receptivity (W1) ((W1)-(W1 ') through the heat eliminating medium that drives by another pump chamber), the cooling performance that obtains expecting.
Promptly; Cooling device in the embodiments of the invention;, liquid crystal panel of printing opacity etc. avoids inappropriate liquid cooling medium when being cooled off; Utilize the air heat eliminating medium to cool off,, realize making heater temperature (Th) cooling (temperature: method Tc) such as liquid crystal panel through the caloric receptivity (" b ") of the liquid cooling medium that drives by first pump chamber 511 and caloric receptivity (" c ") by second pump chamber, 5 12 driven air heat eliminating mediums.
But, if the caloric receptivity of air heat eliminating medium and liquid cooling medium are same flow, then as stated; Heat absorption is merely about 1/3200; A driving pump 51 2 is being divided among the embodiment of pump chamber, and liquid cooling medium is inevitable identical with the driving flow of air heat eliminating medium, so as shown in Figure 2; Resting on increases caloric receptivity (" c "), the caloric receptivity W1 that can not obtain expecting.Therefore, be necessary the air heat eliminating medium accumulating and circulate about 3200 times.
The heat interchange state of the type of cooling of embodiments of the invention is described with reference to Fig. 4.
Fig. 4 is based on the consideration of the general type of cooling, and the synoptic diagram of heat interchange state of cooling of the type of cooling of embodiments of the invention is described.Fig. 4 (a) is with the basic general cooling situation of model representation.Fig. 4 (b) is with the cooling situation of specification of a model embodiments of the invention.The temporal notion of the flow that transverse direction (axle) expression supposition is relevant with heat interchange, longitudinal direction (axle) is represented the notion on the temperature relevant with heat interchange.
Shown in Fig. 4 (a); Usually; The cooling device of the heater of electronic equipment is cooled to the following cooling work temperature (Tc) of allowable temperature (T0) of cooled body for the heating temp (Th) with cooled body; Heat eliminating medium through temperature (Ta) carries out heat interchange; The heating temp of cooled body (Th) is heated by the liquid cooling medium of the heating part of water-cooling pattern or the ventilating air of air cooling mode, obtains the needed heat of chilling temperature (Tc) (temperature variation: (Th-Tc)), i.e. the heat (W1) of heat eliminating medium absorption is for to dispel the heat through the heating temperature (Tc) of thermal component to heat eliminating medium; And become the heat (temperature: (Ta-Tc)) of the coolant temperature (Ta) before being heated, promptly equal heat eliminating medium liberated heat (W2).Like this, in such cooling device, the transfer of heat that heat absorption and heat radiation cause is balanced.
In the cooling device of embodiments of the invention, according to relation of caloric receptivity (W1) and heat dissipation capacity (W2), the state of cooling of the heat (W1) that utilizes Fig. 4 (b) to be illustrated as to obtain stipulating comprises that the above content of having stated explains once more.
The temperature (Tc) of the air after heater sprays and absorbs heat in the liquid crystal display 1 is carried out thermal diffusion through framework 2 grades during in framework 2, being detained and is dispelled the heat, and supposes that air becomes temperature (T1).The air of temperature (T1) is inhaled into through the second inflow crossing 514 of second refrigerating module, gets into pump chamber 512, and through the second outflow crossing 516, circulation pipe arrangement 552 is transplanted on air heat exchange parts 56.
Suppose; The air of temperature (T1) is ejected into cooled body (temperature: Th) from nozzle 57; (temperature: T1) from the heat absorption of the temperature (Th) of cooled body, the natural heat dissipation amount of framework 2 is big, and the viewpoint of the air cooling performance that reduces from air themperature is seen preferably to be inhaled into the air of pump chamber 512.But in the reality, only this natural heat dissipation is difficult to make air themperature (T1) to decline to a great extent, so become the situation of the chilling temperature (Tc) that is difficult to be cooled to regulation.
Here; Through reducing (temperature: the temperature (T1) of the air that T2) sprays; Increase the caloric receptivity of the temperature (Th) from cooled body thus, circulation in the air heat exchange parts 56 of second refrigerating module is with the air (temperature: T1) cool off (temperature: T2) of first refrigerating module to storing.The thermal conversion state of first refrigerating module is same as described above.
Here, with state that the volume by two two pump chambers cutting apart of this turbulence pump 51 equates under, suppose that the heat eliminating medium that drives through pump chamber 512 is situation and the explanation of the embodiment of air.Pump after pump chamber two is cut apart in use, the pump number is few, realizes the effect of assembleability and installation property easily, on the contrary, the heat eliminating medium amount is reduced by half but does not reduce cooling power, to after this stating.
The hot amount of movement of air heat eliminating medium and liquid cooling medium has 1: 3200 different approximately; So in the cooling device of identical formation; The cooling that the cooling that the air heat eliminating medium carries out is carried out with respect to liquid cooling medium; Only otherwise increase the flow of air, the cooling of same performance in the time of just can not carrying out being heated with liquid cooling medium with this ratio amount.In other words; The injection method of the air that nozzle 57 sprays is if continuous; Then drive in the embodiments of the invention of each heat eliminating medium at a turbulence pump 51, the flow of inhaled air and the flow of liquid cooling medium are same amount, can not carry out the cooling of the regulation of high-temperature body.In order to replenish the in shortage of this hot amount of movement, the injection method through control air carries out.
From the injection of the air of the nozzle that is used for the cooling down high-temperature body 57, after driving turbulence pump 51 and sending into the air of ormal weight in the air heat exchanger 56, control with the cycle of regulation and spray by injection control module.Utilize the open nozzle 57 of cycle of regulation, thereby the supposition air becomes the state of in air heat exchange parts 56, air being stored with certain compressive state, rather than carries out adiabatic compression consciously during injection cycle.In addition; Spray through not shown jetting system by nozzle 57; Open by nozzle owing to have the pressure resistance of nozzle; So expectation descends because of the temperature of the injection air that the adiabatic expansion of certain air produces, but the temperature that this adiabatic expansion produced to descend be not to have a mind to carry out, but by suitable compression, the decision of expanding.The purpose of spraying is, in order to carry out the heat handover of air and cooled body, and guarantees the method for the air mass flow of moment.
Here, as long as pump discharge is constant, then the air mass flow of circulation is continuous airflow; Or interrupted injection periodically; The flow of air heat eliminating medium is certain in official hour, so total caloric receptivity is certain, but because caloric receptivity is proportional with flow velocity; So compare with the flow increase of the air heat eliminating medium that makes circulation, seek to spray the increase of flow velocity and can more effectively tackle.
But in not changing the pump that heat eliminating medium drives flow, the driving total amount of air is constant, so in order to absorb the heat of regulation, and accumulate at the appointed time to obtain the total amount of air.Carry out the circulation that this official hour is accumulated, promptly periodically drive.
Through periodically spraying the heat absorption that cooling air carries out heater, therefore, after the state of cooling, the heating temp of cooled body rises when spraying.The temperature of cooled body if long-time continuing then possibly exert an influence to liquid crystal panel, but in the temperature uphill process of liquid crystal panel, spray low temperature wind intermittently, was cooled off between the rising stage, thereby can guarantee the allowable temperature (T0) of heater fifty-fifty.
On the other hand, cool off, be accompanied by the cycle of injection, the chilling temperature change of cooled body through injection air periodically.In order to tackle this problem, the injection cycle to the cooling air of cooled body is preferably and forms the image information field frequency, or the whole approximate number of field frequency.
Liquid crystal displays etc., the pixel of sequential scanning composing images constitutes 1 width of cloth image by field frequency.If spray cooling air synchronously with field frequency; Then at the injection timing of cooling air; Location of pixels by on the picture that scans is always certain scanning position; So the scanning in identical place is cooled constantly on picture, the state that the brightness of the image that the temperature variation on the picture produces changes has the same cycle, so can make visual being changed to necessarily.
Therefore field frequency is 1/60 second in the TV of NTSC mode for example, after accumulating above-mentioned 1/3200 60 times, sprays again.That is the caloric receptivity that, when the injection air heat eliminating medium, needs abundance about 1/50.Form nozzle diameter, the flow velocity that makes the flow velocity of nozzle compare existing liquid cooling medium is 50 times.
Embodiments of the invention use following control method: the airflow that nozzle 57 is sprayed increases the flow of total turbulence pump 51; And suppress the maximization of cooling device; Interrupted injection jet airstream in time for this reason; But pay attention to most the dustproof purpose of seeking electronic equipment, and, cooling air is ventilated in order to seek the cooling of liquid crystal panel etc.; Under the situation of the chilling temperature of wanting to obtain stipulating, also can be liquid cooling medium driving with pump two the special uses independent setting of the injection of air with pump and cooling air.
In addition, according to the driving flow of pump, improving cooling performance can be same with the cooling means of prior art.
Even cooled body is the heat generating components beyond the liquid crystal panel, also can near cooled body, set up the same nozzle of configuration.
And then, also be applicable in other electronic equipment that requires beyond the airtight liquid crystal display.
Cooling device according to the embodiments of the invention of above-mentioned formation; Relate to the cooling of high-temperature body of the liquid crystal display of projection light; Can not attract foreign material and dust in liquid crystal display from the outside; Can cool off the heat that liquid crystal panel or Polarizer is produced owing to projection source efficiently, cooling can provide the image quality of projection visually to obtain the evenly best liquid crystal display of sense to image quality also not influence.
Claims (2)
1. cooling device that electronic equipment is used is characterized in that having:
The heat eliminating medium driver module comprises first pump chamber and suction that sucks and discharge air and second pump chamber of discharging liquid coolant, first pump chamber and second pump chamber interlock action;
The air cooling module comprises: nozzle, to liquid crystal panel or Polarizer ejection cooling air; And heat exchange department, flow into the air that sucks and discharge through said first pump chamber and cool off this air, flow out chilled cooling air to said nozzle simultaneously, this air cooling module is arranged at airtight inside of the electronic equipment that is built-in with liquid crystal panel and Polarizer;
The liquid cooling module comprises: the portion of being heated, cool off said heat exchange department through the liquid coolant that sucks and discharge by said second pump chamber; Radiating part carries out the heat radiation by the liquid coolant after the heat absorption of the said portion of being heated, and is arranged at said airtight outside; And pipeline, so that liquid coolant round-robin mode in said second pump chamber, said be heated portion and said radiating part is connected and the said liquid coolant that circulates; With
Injection control module, wherein,
From the injection of the air of said nozzle, be after the air of ormal weight is sent into said heat exchange department, control with the cycle of regulation by said injection control module and spray.
2. the cooling device that electronic equipment as claimed in claim 1 is used is characterized in that:
Carry out the air ejection of said nozzle with the field frequency of said liquid crystal panel or the frequency period property ground that is synchronized with its approximate number frequency.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007009702 | 2007-01-19 | ||
| JP2007009702A JP5023711B2 (en) | 2007-01-19 | 2007-01-19 | Cooling system |
| JP2007-009702 | 2007-01-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101227812A CN101227812A (en) | 2008-07-23 |
| CN101227812B true CN101227812B (en) | 2012-10-03 |
Family
ID=39703144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100017435A Expired - Fee Related CN101227812B (en) | 2007-01-19 | 2008-01-08 | Cooling device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5023711B2 (en) |
| CN (1) | CN101227812B (en) |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5150181B2 (en) * | 2007-09-19 | 2013-02-20 | 三洋電機株式会社 | Projector cooling system |
| JP2011203963A (en) * | 2010-03-25 | 2011-10-13 | Fujitsu Ltd | Computer cooling system and computer cooling method |
| CN101986200B (en) * | 2010-07-19 | 2012-07-18 | 深圳雅图数字视频技术有限公司 | Liquid cooling and heat dissipating system for digital light processing (DLP) projector |
| JP5828372B2 (en) * | 2010-09-21 | 2015-12-02 | セイコーエプソン株式会社 | Cooling device and projector |
| CN102854720B (en) * | 2011-06-30 | 2014-10-22 | 中强光电股份有限公司 | Dedusting module and projection device |
| CN104238247B (en) * | 2014-07-23 | 2016-04-13 | 深圳雅图数字视频技术有限公司 | Projector equipment |
| US9664987B2 (en) | 2014-11-18 | 2017-05-30 | Canon Kabushiki Kaisha | Image display apparatus |
| JP6515647B2 (en) * | 2015-04-08 | 2019-05-22 | セイコーエプソン株式会社 | projector |
| CN105527786B (en) * | 2016-02-02 | 2017-12-01 | 苏州佳世达光电有限公司 | Cooling system and projection arrangement |
| CN105807545B (en) * | 2016-05-13 | 2018-06-26 | 深圳市毅丰光电科技有限公司 | Projector's temperature control system and method, projector |
| CN109188833A (en) * | 2018-10-24 | 2019-01-11 | 泉州市新锐极光科技有限公司 | A kind of radiator and its method of ultra short focal projector |
| CA3134809A1 (en) * | 2019-03-28 | 2020-10-01 | Maintech Co., Ltd. | Monitoring camera device |
| CN114063371B (en) * | 2020-07-31 | 2023-05-26 | 中强光电股份有限公司 | Liquid cooling device and projection equipment |
| CN112443519B (en) * | 2020-12-11 | 2022-09-09 | 山东军成机械科技有限公司 | Integral sealing type hydraulic pump station |
| CN114384746A (en) * | 2022-02-24 | 2022-04-22 | 广州瑞格尔电子有限公司 | Refrigeration type liquid cooling heat dissipation closed LCD projection optical machine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005148624A (en) * | 2003-11-19 | 2005-06-09 | Nec Viewtechnology Ltd | Cooling mechanism, electronic equipment, projector, and method for cooling inside of housing |
| JP2006208488A (en) * | 2005-01-25 | 2006-08-10 | Seiko Epson Corp | Rear projector |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09307257A (en) * | 1996-05-20 | 1997-11-28 | Fujitsu General Ltd | Image display device |
| JP2000045931A (en) * | 1998-08-03 | 2000-02-15 | Shimadzu Corp | Liquid supply equipment |
| JP2004121006A (en) * | 2002-09-30 | 2004-04-22 | Sankoo:Kk | Method for purifying water in aquarium and apparatus for purifying water in aquarium |
| JP2005307941A (en) * | 2004-04-26 | 2005-11-04 | Denso Corp | Heating element cooling device and cooling/heating device |
-
2007
- 2007-01-19 JP JP2007009702A patent/JP5023711B2/en not_active Expired - Fee Related
-
2008
- 2008-01-08 CN CN2008100017435A patent/CN101227812B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005148624A (en) * | 2003-11-19 | 2005-06-09 | Nec Viewtechnology Ltd | Cooling mechanism, electronic equipment, projector, and method for cooling inside of housing |
| JP2006208488A (en) * | 2005-01-25 | 2006-08-10 | Seiko Epson Corp | Rear projector |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101227812A (en) | 2008-07-23 |
| JP5023711B2 (en) | 2012-09-12 |
| JP2008176079A (en) | 2008-07-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101227812B (en) | Cooling device | |
| KR101670985B1 (en) | Display Apparatus | |
| CN100498512C (en) | Projection type video display apparatus | |
| CN101713907B (en) | A projector | |
| US8004648B2 (en) | Air curtain for display | |
| CN101546105B (en) | Projector | |
| CN101203803B (en) | Projector system having cooling fan | |
| CN100529958C (en) | Liquid crystal projector, its liquid crystal panel, and its liquid cooler | |
| CN102326224A (en) | Thermal control system for an electronic display | |
| US7210789B2 (en) | Liquid crystal display device and liquid crystal cooling unit | |
| CN108449921A (en) | A kind of radiator structure and electronic device of display device | |
| JP4811190B2 (en) | LCD display | |
| CN114384746A (en) | Refrigeration type liquid cooling heat dissipation closed LCD projection optical machine | |
| CN101859056B (en) | Projector | |
| JPH04125538A (en) | Cooling device for polarizing plate and liquid crystal panel | |
| CN201177724Y (en) | Projector cooling construction | |
| CN205491614U (en) | Integral type cooling device | |
| CN205982964U (en) | Projection arrangement and cooling system thereof | |
| KR100954514B1 (en) | Outdoor display system | |
| CN101986202B (en) | Liquid cooling and heat dissipating system for liquid crystal display (LCD) projector | |
| CN104596140B (en) | All-in-one formula projector and its refrigeration system | |
| CN208399876U (en) | Cycle refrigeration system in a kind of electronic projection apparatus | |
| CN110286550A (en) | A kind of active refrigeration formula totally-enclosed Single panel LCD projection light machine | |
| KR101344866B1 (en) | Digital Micro-mirror Device module cooling apparatus | |
| CN208063661U (en) | A kind of radiator structure and electronic device of display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: HITACHI LTD. Free format text: FORMER OWNER: HITACHI,LTD. Effective date: 20130816 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20130816 Address after: Tokyo, Japan Patentee after: HITACHI CONSUMER ELECTRONICS Co.,Ltd. Address before: Tokyo, Japan Patentee before: Hitachi, Ltd. |
|
| ASS | Succession or assignment of patent right |
Owner name: HITACHI MAXELL LTD. Free format text: FORMER OWNER: HITACHI LTD. Effective date: 20150302 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150302 Address after: Osaka Japan Patentee after: Hitachi Maxell, Ltd. Address before: Tokyo, Japan Patentee before: Hitachi Consumer Electronics Co.,Ltd. |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20180305 Address after: Kyoto Japan Patentee after: MAXELL, Ltd. Address before: Osaka Japan Patentee before: Hitachi Maxell, Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121003 Termination date: 20220108 |