WO2018018974A1 - 色轮装置及投影机 - Google Patents

色轮装置及投影机 Download PDF

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Publication number
WO2018018974A1
WO2018018974A1 PCT/CN2017/082451 CN2017082451W WO2018018974A1 WO 2018018974 A1 WO2018018974 A1 WO 2018018974A1 CN 2017082451 W CN2017082451 W CN 2017082451W WO 2018018974 A1 WO2018018974 A1 WO 2018018974A1
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WO
WIPO (PCT)
Prior art keywords
color wheel
passage
heat
heat exchange
air
Prior art date
Application number
PCT/CN2017/082451
Other languages
English (en)
French (fr)
Inventor
邓高飞
林伟
谢涛
李屹
Original Assignee
深圳市光峰光电技术有限公司
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Filing date
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Application filed by 深圳市光峰光电技术有限公司 filed Critical 深圳市光峰光电技术有限公司
Priority to US16/320,960 priority Critical patent/US10663845B2/en
Priority to EP17833280.5A priority patent/EP3492978B1/en
Priority to JP2019504039A priority patent/JP2019525244A/ja
Publication of WO2018018974A1 publication Critical patent/WO2018018974A1/zh

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Classifications

    • 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
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2033—LED or laser light sources
    • G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
    • 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
    • G03B21/145—Housing details, e.g. position adjustments thereof
    • 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
    • G03B21/16—Cooling; Preventing overheating
    • 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
    • G03B21/20—Lamp housings
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/3144—Cooling systems

Definitions

  • the invention relates to the field of optoelectronics, in particular to a color wheel device and a projector.
  • the color wheel is a key component in the projection display device for generating light required for imaging.
  • the color wheel carries a wavelength conversion material, and the light beam from the solid state light source is converted into a laser beam of a desired wavelength, and the color wheel is The beam of the solid-state light source is converted into a large amount of heat generated during the laser irradiation process. If the heat cannot be dissipated in time, the light conversion efficiency of the wavelength conversion material will be affected, and the dust also has a great influence on the heat dissipation and conversion efficiency of the color wheel. If dust accumulates on the color wheel, the accumulation of dust is extremely likely to cause rapid accumulation of heat, and in severe cases, the color wheel will be burnt.
  • the color wheel as the wavelength conversion component has extremely high requirements for heat dissipation and dustproof, and heat dissipation and dustproof are a pair of contradictory factors.
  • the color wheel is sealed in the color wheel housing, and the housing is sealed.
  • the fins which are often arranged to facilitate heat dissipation, are brought into contact with the housing by the outside air to take away the heat transferred from the color wheel to the housing.
  • This method has poor heat dissipation effect, especially in applications where the illumination beam energy is getting higher and higher.
  • the temperature of the color wheel will exceed the upper limit of the temperature, which causes the optical performance of the color wheel to drop or even burn the color wheel, which affects the service life of the color wheel.
  • the invention provides a color wheel device and a projector, which aims to solve the problem that the existing color wheel device has poor heat dissipation, resulting in a decrease in color wheel performance and a decrease in life.
  • the invention provides a color wheel device comprising:
  • a color wheel cavity for accommodating a color wheel module, wherein the color wheel cavity is provided with an air inlet and an air outlet; and the color wheel module is configured to be irradiated with excitation light to generate a laser beam Wavelength conversion layer;
  • a heat exchanger comprising a heat exchange core, the heat exchange core being provided with a first passage for gas passage through the color wheel cavity, an air outlet of the color wheel cavity and the first passage Heat exchange inlet communication, the heat exchange outlet of the first passage is in communication with the air inlet of the color wheel cavity to form a closed circulation air passage;
  • the first passage is spaced apart by a plurality of layers, the adjacent a space between the two first channels forms a second passage for the passage of outside air; the air inlet and the air outlet of the second passage are respectively formed on two opposite surfaces of the heat exchanger;
  • the power unit is disposed in a connecting passage that communicates between the heat exchange outlet of the first passage and the intake port of the color wheel chamber.
  • the color wheel device wherein the height of the connecting channel is less than 1/3 of the height of the second channel.
  • the color wheel device wherein the air outlet and the air inlet are disposed at diagonal positions in the color wheel cavity, the first channel heat exchange inlet and the first channel heat exchange outlet Positioned in a diagonal position in the first passage; wherein the air outlet is located at a lower diagonal position of the color wheel cavity, and the first channel heat exchange inlet is located at a lower pair of the first channel Corner position.
  • a color wheel device wherein a flow direction of air in the first passage is perpendicular to a flow direction of air in the second passage.
  • the color wheel device wherein the heat exchanger is disposed at least in the circulation duct.
  • the inner wall of the color wheel cavity is provided with a heat conducting column for heat exchange with the airflow in the color wheel cavity; and the surface of the backlight of the wavelength conversion layer is provided with heat dissipating teeth.
  • the color wheel device wherein the color wheel module comprises a color wheel substrate for carrying the wavelength conversion layer, and the outer edge of the color wheel substrate is provided with heat dissipating teeth distributed along a circumference thereof.
  • a heat dissipation cavity is formed at the center of the circulation air duct, and the first wheel passage and the connection channel of the heat exchanger are disposed around the heat dissipation cavity.
  • a projector comprising:
  • a color wheel device for providing power for air flow inside the projector, and a heat dissipating fan for the color wheel device described above.
  • the color wheel device and the projector provided by the invention provide a plurality of first passages separated by aluminum foil or copper foil in a circulating air passage, and a second passage for external air flow is formed between the adjacent two first channels.
  • the airflow in the circulating air passage intersects with the external air flow direction, so that the air in the external air and the circulating air passage directly exchange heat through the aluminum foil or the copper foil, thereby greatly improving the heat dissipation efficiency of the color wheel device;
  • the blower and the cooling fan respectively provide
  • the flow velocity of the internal and external airflows of the circulating air duct makes the heat exchange faster; the heat dissipating columns disposed in the circulating air duct and the heat dissipating teeth provided on the color wheel substrate respectively increase the gas in the color wheel substrate and the sealing shell and the circulating air duct.
  • the heat exchange area between the two further enhances the heat dissipation efficiency of the color wheel device.
  • FIG. 1 is a schematic plan view showing a planar structure of a color wheel device according to an embodiment of the present invention
  • FIG. 2 is a schematic perspective structural view of a color wheel device according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram showing the planar structure of a color wheel device according to still another embodiment of the present invention.
  • the color wheel device provided in this embodiment includes a color wheel cavity 1, a color wheel module 2, a heat exchanger 3, and a connecting channel 4.
  • the color wheel module 2 is housed inside the color wheel cavity 1, the connecting channel 4 is connected to the heat exchanger 3 and the color wheel cavity 1, and the connecting channel 4 is provided with an aerodynamic device for accelerating airflow in the color wheel cavity.
  • the aerodynamic device in this embodiment is a blower 41.
  • the color wheel module 2 includes a color wheel substrate 21 carrying a wavelength conversion layer.
  • the wavelength conversion layer contains a wavelength converting material that absorbs the excitation light and is excited to produce a specific laser light.
  • the most commonly used wavelength converting materials are phosphors, such as yttrium aluminum garnet (YAG) phosphors, which absorb blue light and are excited to produce a yellow laser.
  • the wavelength converting material may also be a material having wavelength conversion ability such as a quantum dot or a fluorescent dye, and is not limited to a phosphor.
  • the wavelength converting material tends to be powdery or granular, and it is difficult to directly form the wavelength converting material layer. In this case, it is necessary to use an adhesive to fix the respective wavelength converting material particles together and form a specific shape. , such as a layered layer.
  • the air inlet 11 and the air outlet 12 in the color wheel chamber 1 are disposed at diagonal positions inside thereof, wherein the air outlet 12 is located at a lower diagonal position of the color wheel chamber.
  • One end of the connecting passage 4 communicates with the air inlet 11 of the color wheel chamber 1, and the other end communicates with the heat exchange core of the heat exchanger 3.
  • a blower 41 is provided in the connecting passage 4 for driving the inside of the circulating duct.
  • the heat exchanger 3 includes a heat exchange core, and the heat exchange core is provided with a plurality of first passages, and the first passage heat exchange inlet 31 and the heat exchange outlet 32 are disposed at a diagonal position in the first passage, and the first passage The heat exchange inlet 31 is located at a lower diagonal position of the first passage.
  • the air outlet 12 of the color wheel chamber 1 communicates with the heat exchange inlet 31 of the first passage, and the heat exchange outlet 32 of the first passage communicates with the air inlet 11 of the color wheel chamber 1 through the connecting passage 4.
  • the first channel is separated by a metal, a metal alloy, a plastic or a paper material to form a plurality of microchannels, which may be layered or tubular.
  • This embodiment preferably uses a layered channel formed by isolating aluminum foil or copper foil.
  • the adjacent two first channels are spaced apart, and the adjacent two channel wall ends are connected, that is, the adjacent two first channels are connected at the heat exchange inlet 31, corresponding to the heat exchange outlet 32 are also connected together.
  • the space between the adjacent first channels of the two layers has openings in the opposite directions in the opposite directions, so that a second passage for the passage of outside air is formed between the two first channels.
  • the openings at the two ends of the second passage serve as the air inlet 33 and the air outlet 34 of the second passage, and the first passage and the second passage have a common passage wall.
  • the aluminum foil or copper foil serving as the channel wall separates the first channel from the second channel such that the first channel and the second channel spatially form a mutually intersecting structure. Since there is a temperature difference between the hot airflow in the first passage and the external airflow in the second passage, the intersection of the two passages, the hot air in the first passage and the outside air in the second passage pass through the aluminum foil/copper foil.
  • the heat exchange is performed directly without any other intermediate medium, and the thickness of the aluminum foil/copper foil is thin, so that the heat exchange efficiency of the heat exchanger 3 is excellent.
  • the height of the connecting channel 4 is set to be less than 1/3 of the height of the second channel, where the height refers to the thickness of the solid through which the connection passes, ie the distance from one surface to the other surface, second
  • the height of the channel also refers to the distance between the plurality of second channels. At most 1/3 of the airflow through the second channel is blocked by the connecting channel, so that most of the airflow is not obstructed by the connecting channel under the action of the whole fan, and the component is miniaturized while being effectively reduced. Airflow resistance is beneficial to the improvement of heat dissipation efficiency.
  • a heat dissipating cavity 51 is formed at the center of the circulation duct 5, the circulation duct 5 is disposed around the heat dissipating cavity 51, and the air inlet 33 of the second passage of the heat exchanger 3 is disposed in the heat exchanger. 3 is directed to a side surface of the heat exchange chamber 51, and the second passage communicates the heat dissipation chamber 51 with the peripheral space of the circulation duct 5.
  • the air outlet 34 of the second passage is disposed on a side surface of the heat exchanger 3 facing away from the heat exchange chamber 51.
  • the heat dissipation cavity 51 is surrounded by the outer surface of the circulation air passage 5, so that the circulation air passage 5 as a whole has a "back shape” or a similar concentric shape. Both ends of the heat dissipation cavity 51 communicate with the external space to ensure smooth flow of outside air through the heat dissipation cavity 51.
  • the direction of the second channel is preferably perpendicular to the first channel such that the air flow in the first channel is perpendicular to the flow direction of the air in the second channel, reducing the airflow at the intersection of the first channel and the second channel.
  • the heat exchange time is such that a portion of the two gas streams participating in the heat exchange maintains a large temperature difference, and the first and second channels intersecting each other to increase the heat exchange area and enhance the heat exchange efficiency.
  • heat dissipating teeth 22 may be provided at the outer edge of the color wheel substrate 21 and/or on the backlight side.
  • the heat dissipating teeth 22 are disposed on the outer edge of the color wheel substrate 21, and the surface of the heat dissipating teeth 22 is parallel to the color wheel substrate 21, so that the air resistance caused by the air flow in the circulating air duct 5 can be minimized.
  • the heat dissipation surface of the color wheel substrate 21 can be increased, and the heat exchange efficiency between the color wheel module 2 and the air in the color wheel cavity 1 can be improved.
  • a plurality of heat conducting columns 52 may be disposed on the inner wall of the color wheel cavity 1 facing the color wheel module 2.
  • the heat conducting column 52 increases the heat exchange area between the color wheel cavity 1 and the airflow flowing through the surface thereof.
  • the heat dissipation efficiency of the color wheel cavity 1 is enhanced.
  • the heat conducting column can be selected to have a gradual structure, and the diameter of the heat conducting column near the color wheel portion is smaller than the diameter of the heat conducting column away from the color wheel portion.
  • the backlight surface of the color wheel substrate 21 may be provided with a tooth portion, and the tooth and the color wheel substrate 21 may form a centrifugal driving device for driving the gas flow in the color wheel cavity instead of the air blower. 41.
  • the heat exchangers 3 may be sequentially disposed along the direction of the circulation air passage 5, and the heat dissipation effect of the color wheel device is greatly increased by the multi-stage heat dissipation.
  • two heat exchangers 3 are disposed on the circulation duct 5, and the airflow flowing out of the air outlet 12 of the color wheel chamber 1 sequentially passes through the two heat exchangers 3, and the airflow is re-flowed after two cooling steps.
  • the air inlet 11 of the color wheel chamber 1 is circulated to continuously transmit the temperature generated by the color wheel module 2 to the outside, thereby cooling the temperature.
  • the present invention also provides a projector including a color wheel device and a heat dissipation fan, wherein the color wheel device is the color wheel device described in the above embodiment.
  • the cooling fan 6 is a cooling fan of the projector, and the airflow flowing through the second channel is accelerated and pulled away by the cooling fan 6, so that the outside air in the heat dissipation cavity 51 quickly passes through the second channel (as shown by the single row arrow in FIG. Show), thereby improving heat exchange efficiency.
  • the flow rate of the gas of both heat exchanges is increased by the blower 41 and the heat radiating fan 6, respectively, thereby increasing the heat exchange frequency.
  • the color wheel device and the projector provided by the invention provide a plurality of first passages separated by aluminum foil or copper foil in a circulating air passage, and a second passage for external air flow is formed between the adjacent two first channels.
  • the airflow in the circulating air passage intersects with the external air flow direction, so that the air in the external air and the circulating air passage directly exchange heat through the aluminum foil or the copper foil, thereby greatly improving the heat dissipation efficiency of the color wheel device;
  • the blower and the cooling fan respectively provide
  • the flow velocity of the internal and external airflows of the circulating air duct makes the heat exchange faster; the heat dissipating columns disposed in the circulating air duct and the heat dissipating teeth provided on the color wheel substrate respectively increase the gas in the color wheel substrate and the sealing shell and the circulating air duct.
  • the heat exchange area between the two further enhances the heat dissipation efficiency of the color wheel device.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Optics & Photonics (AREA)
  • Signal Processing (AREA)
  • Projection Apparatus (AREA)
  • Optical Filters (AREA)
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Abstract

一种色轮装置及投影机，其中，色轮装置包括：用于容纳色轮模组(2)的色轮腔体(1)，色轮腔体(1)设有进气口(11)及出气口(12)；设有换热芯的换热器(3)，换热芯设有用于供色轮腔体(1)内气体通过的第一通道，色轮腔体的出气口(12)与第一通道的热交换进口(31)联通，第一通道的热交换出口(32)与色轮腔体(1)的进气口(11)联通，形成闭合的循环风道(5)；第一通道相间隔的设置多层，相邻两层第一通道之间的空间形成用于外界空气通过的第二通道；还包括用于加速气体流动的空气动力装置。通过在循环风道(5)内设置由铝箔或铜箔分隔而成的多层第一通道，相邻两层第一通道间形成与外部连通的第二通道，使循环风道(5)内的气流与外界空气流向相交叉，极大地提高了色轮装置的散热效率。

Description

色轮装置及投影机 技术领域
本发明涉及光电领域，尤其涉及一种色轮装置及投影机。
 背景技术
色轮是投影显示装置中产生成像所需光的关键部件，在激光显示技术中，色轮承载有波长转换材料，将来自于固态光源的光束转换成需要的波长的受激光，色轮在将固态光源的光束转换成受激光的过程中会产生的大量的热量，如果热量不能及时散发将会影响波长转换材料的光转换效率，另外尘埃对色轮的散热和转换效率也具有极大影响，如果色轮上积聚灰尘，积聚灰尘的部分的极容易引起热量的快速积累，严重时将烧毁色轮。
 技术问题
因此作为波长转换部件的色轮对散热和防尘具有极高的要求，而散热和防尘又是一对矛盾的因素，现有技术中采用将色轮密封在色轮壳体中，壳体往往设置成有利于散热的翅片，通过外界空气与壳体接触带走色轮传导到壳体上的热量，此方式散热效果不佳，尤其是在照射光束能量越来越高的应用场景比如光的能量密度较大时，色轮的温度会超过承受温度的上限，导致色轮光学性能下降甚至烧毁色轮，影响色轮的使用寿命。
 技术解决方案
本发明提供一种色轮装置及投影机，旨在解决现有色轮装置散热不良，导致色轮性能下降、寿命降低的问题。
根据本发明的第一方面，本发明提供一种色轮装置，包括：
色轮腔体，所述色轮腔体用于容纳色轮模组，所述色轮腔体设有进风口及出风口；所述色轮模组承载有用于经激发光照射并产生受激光的波长转换层；
换热器，所述换热器包括换热芯，所述换热芯设有用于供色轮腔体内气体通过的第一通道，所述色轮腔体的出气口与所述第一通道的热交换进口联通，所述第一通道的热交换出口与所述色轮腔体的进气口联通，形成封闭的循环风道；所述第一通道相间隔的设置多层，所述相邻两层第一通道之间的空间形成用于外界空气通过的第二通道；所述第二通道的进风口及出风口分别开设在所述换热器两个相正对的表面上；
空气动力装置，用于加速循环风道中的气体流动。该动力装置设置在连通所述第一通道的热交换出口与所述色轮腔体的进气口的连接通道中。
所述的色轮装置，其中，所述连接通道的高度小于所述第二通道高度的1/3。
所述的色轮装置，其中，所述出气口和所述进气口在所述色轮腔体中呈对角位置设置，所述第一通道热交换进口和所述第一通道热交换出口在所述第一通道中呈对角位置设置；其中所述出气口位于所述色轮腔体较低的对角位置，所述第一通道热交换进口位于所述第一通道较低的对角位置。
述的色轮装置，其中，所述第一通道中空气的流向与所述第二通道中空气的流向相互垂直。
所述的色轮装置，其中，所述换热器在所述循环风道中至少设置一处。
所述的色轮装置，其中，所述色轮腔体内壁设有用于与所述色轮腔体内气流进行热交换的导热柱；所述波长转换层背光一侧表面设有散热齿。
所述的色轮装置，其中，色轮模组包括用于承载所述波长转层的色轮基板，所述色轮基板外缘设有沿其圆周分布的散热齿。
所述的色轮装置，其中，所述循环风道中心处形成两端与外界相连通的散热腔体，所述色轮腔体、换热器第一通道和连接通道环绕散热腔体设置。
 有益效果
根据本发明的第二方面，本发明提供一种投影机，包括：
色轮装置和散热风扇，所述散热风扇用于提供投影机内部空气流动的动力，所述色轮装置为以上所述的色轮装置。
本发明所提供的色轮装置及投影机，通过在循环风道内设置由铝箔或铜箔分隔组成的多层第一通道，相邻两层第一通道之间形成用于外部空气流动第二通道，使得循环风道内的气流与外界空气流向相交叉，使得外部空气与循环风道内的空气通过铝箔或铜箔直接进行热交换，极大地提高了色轮装置的散热效率；鼓风机及散热风扇分别提供了循环风道内部与外部气流的流速，使得热交换进行的更快；循环风道内设置换热柱及色轮基板上设置的散热齿分别增加了色轮基板及密封壳体与循环风道内气体之间的换热面积，进一步增强了色轮装置的散热效率。
 附图说明
图1为本发明实施例中，色轮装置的平面结构示意图；
图2为本发明实施例中，色轮装置的立体结构示意图；
图3为本发明又一实施例中，色轮装置的平面结构示意图。
 本发明的最佳实施方式
下面通过具体实施方式结合附图对本发明作进一步详细说明。
实施例一、
本实施例所给出的色轮装置，如图1及图2所示，包括色轮腔体1、色轮模组2、换热器3及连接通道4。其中，色轮模组2收容在色轮腔体1内部，连接通道4连接换热器3与色轮腔体1，连接通道4内设有空气动力装置，用于加速气流在色轮腔体1内部的流动，本实施例中的空气动力装置为鼓风机41。
色轮模组2包括承载有波长转换层的色轮基板21。波长转层含有波长转换材料，其吸收激发光并受激产生特定的受激光。最常用的波长转换材料是荧光粉，例如钇铝石榴石(YAG)荧光粉，它可以吸收蓝光并受激产生黄色的受激光。波长转换材料还可能是量子点、荧光染料等具有波长转换能力的材料，并不限于荧光粉。在很多情况下，波长转换材料往往是粉末状或颗粒状的，难以直接形成波长转换材料层，此时就需要使用一种粘接剂把各个波长转换材料颗粒固定在一起，并形成特定的形状，如片层状。
色轮腔体1中的进气口11和出气口12在其内部呈对角位置设置，其中，出气口12位于色轮腔体较低的对角位置。连接通道4一端接口与色轮腔体1的进气口11连通，另一端接口与换热器3的换热芯联通。连接通道4内设有鼓风机41用于驱动在循环风道内部流动。
进一步地，换热器3包括换热芯，换热芯设有多层第一通道，第一通道热交换进口31与热交换出口32在第一通道中呈对角位置设置，且第一通道热交换进口31位于第一通道较低的对角位置。色轮腔体1的出气口12与第一通道的热交换进口31联通，第一通道的热交换出口32通过连接通道4与色轮腔体1的进气口11联通。从而形成了气流由色轮腔体1的出气口12到第一通道的热交换进口31，再由第一通道的热交换出口32回到色轮腔体1的进气口11的循环风道5。使得循环风道5内吸收了色轮模组2热量的气流通过换热器3进行冷却，再循环经过色轮模组2，如此起到为色轮模组2降温的效果（如图1中多排箭头所示）。其中，第一通道采用金属、金属合金、塑料或者纸质材料隔离而成多个微通道，其可以是层状，或管状。本实施例优选的采用铝箔片或铜箔片隔离而成的层状通道。在本发明的其他实施例中，还可以采用铝片、银片或者纸板形成第一通道，每层第一通道包括形成通道壁的铝箔片或铜箔片。相邻的两层第一通道相间隔的分布，并且相邻的两个通道壁端部相连接，即相邻的两个第一通道在热交换进口31处相连接，对应的在热交换出口32处也同样连接在一起。这样就使得相邻两层第一通道之间的空间只有相对的两个方向上存在与外界联通的开口，这样在两层第一通道之间就形成了用于外界空气通过的第二通道，第二通道两端的开口作为第二通道的进风口33及出风口34，第一通道与第二通道之间拥有共同的通道壁。充当通道壁的铝箔或铜箔片将第一通道与第二通道分隔开，使得第一通道与第二通道在空间上形成相互交叉的结构。由于第一通道内的热气流与第二通道内的外界气流存在温度差，两个通道交叉处，在第一通道内的热空气与第二通道内的外界空气就会通过铝箔/铜箔片直接进行热交换，而无需其他中间介质，并且铝箔/铜箔的厚度较薄，使得换热器3的换热效率极佳。
较佳的，连接通道4的高度设置为小于第二通道高度的1/3，此处所指高度的是指连接通过的实体厚度，即从一表面至相对的另一表面的距离，第二通道的高度同样是指多个第二通道之间的距离。通过第二通道的气流最多只有1/3的面积被连接通道遮挡，这样大部分的气流在整机风扇的作用下不受连接通道的阻碍，在保证部件小型化的同时，有效的减小了气流流通阻力，有利与散热效率的提高。
如图1及图2所示，循环风道5中心处形成散热腔体51，循环风道5环绕散热腔体51一周设置，换热器3的第二通道的进风口33设置于换热器3朝向换热腔体51的一侧表面上，第二通道将散热腔体51与循环风道5的外围空间联通起来。第二通道的出风口34设置在换热器3背离换热腔体51的一侧表面上。具体地，散热腔体51是由循环风道5的外表面围绕而成，使得循环风道5整体呈“回字形”，或呈类似同心圆形状。散热腔体51两端均与外界空间相连通，确保通过散热腔体51的外界空气流通顺畅。
较佳的，第二通道的走向优选的与第一通道相垂直，使得第一通道中的空气流向与第二通道中空气的流向相互垂直，降低第一通道与第二通道相交叉处气流的热交换时间，以使两股气流参与热交换的部分保持较大温差，而通过多层相互交叉的第一通道及第二通道来增加热交换面积，增强换热效率。
为提高循环风道5内的空气与色轮模组2之间的热交换效率，还可以在色轮基板21的外缘处和/或背光侧设有散热齿22。优选的在色轮基板21的外缘设置散热齿22，该处的散热齿22表面于色轮基板21的相平行，这样可将散热齿22在循环风道5内气流造成的风阻降至最低，又能增加色轮基板21的散热面，提高色轮模组2与色轮腔体1内空气之间的热交换效率。本实施例还可以在色轮腔体1的内壁正对色轮模组2处设置若干导热柱52，导热柱52增加了色轮腔体1与流经其表面的气流之间的换热面积，增强色轮腔体1的散热效率。考虑散热效率和风阻问题导热柱可选择渐变结构，靠近色轮部分的导热柱直径小于远离色轮部分导热柱的直径。作为本发明进一步的优化方案，色轮基板21的背光面可设置齿部，该齿与色轮基板21可形成离心式驱动装置，用于驱动色轮腔体中的气体流动，以此替代鼓风机41。
实施例二、
进一步地，本发明其他实施例中，换热器3还可以沿着循环风道5的走向依次设置多个，通过多级散热大幅增加色轮装置的散热效果。如图3所示，换热器3在循环风道5上设置两个，色轮腔体1的出气口12流出的气流依次通过两个换热器3，经过两次降温后的气流再流回色轮腔体1的进气口11，如此循环将色轮模组2产生的温度不断的传递到外界，起到降温的作用。
实施例三、
基于上述实施例的描述，本实用新型还给出了一种投影机，包括色轮装置和散热风扇，其中色轮装置为上述实施例中所叙述的色轮装置。散热风扇6为投影机的散热风扇，在散热风扇6的作用下流经第二通道的气流加速抽离，使散热腔体51内的外界空气快速通过第二通道（如图1中单排箭头所示），进而提高换热效率。通过鼓风机41及散热风扇6分别增加热交换双方气体的流速，从而提高热交换频率。
本发明所提供的色轮装置及投影机，通过在循环风道内设置由铝箔或铜箔分隔组成的多层第一通道，相邻两层第一通道之间形成用于外部空气流动第二通道，使得循环风道内的气流与外界空气流向相交叉，使得外部空气与循环风道内的空气通过铝箔或铜箔直接进行热交换，极大地提高了色轮装置的散热效率；鼓风机及散热风扇分别提供了循环风道内部与外部气流的流速，使得热交换进行的更快；循环风道内设置换热柱及色轮基板上设置的散热齿分别增加了色轮基板及密封壳体与循环风道内气体之间的换热面积，进一步增强了色轮装置的散热效率。
以上内容是结合具体的实施方式对本发明所作的进一步详细说明，不能认定本发明的具体实施只局限于这些说明。对于本发明所属技术领域的普通技术人员来说，在不脱离本发明发明构思的前提下，还可以做出若干简单推演或替换。

Claims (10)

1、一种色轮装置，其特征在于，包括：
色轮腔体，所述色轮腔体用于容纳色轮模组，所述色轮腔体设有进风口及出风口；所述色轮模组承载有用于经激发光照射并产生受激光的波长转换层；
换热器，所述换热器包括换热芯，所述换热芯设有用于供色轮腔体内气体通过的第一通道，所述色轮腔体的出气口与所述第一通道的热交换进口联通，所述第一通道的热交换出口与所述色轮腔体的进气口联通，形成封闭的循环风道；所述第一通道相间隔的设置多层，所述相邻两层第一通道之间的空间形成用于外界空气通过的第二通道；所述第二通道的进风口及出风口分别开设在所述换热器两个相对的表面上；
空气动力装置，所述空气动力装置用于驱动所述循环风道中的气体流动。
2、根据权利要求1所述的色轮装置，其特征在于，所述空气动力装置设置在联通所述第一通道的热交换出口与所述色轮腔体的进气口的连接通道中。
3、根据权利要求1所述的色轮装置，其特征在于，所述连接通道的高度小于所述第二通道高度的1/3。
4、根据权利要求3所述的色轮装置，其特征在于，所述出气口和所述进气口在所述色轮腔体中呈对角位置设置，所述第一通道热交换进口和所述第一通道热交换出口在所述第一通道中呈对角位置设置；其中所述出气口位于所述色轮腔体较低的对角位置，所述第一通道热交换进口位于所述第一通道较低的对角位置。
5、根据权利要求1所述的色轮装置，其特征在于，所述第一通道中气体的流向与所述第二通道中气体的流向相互垂直。
6、根据权利要求1所述的色轮装置，其特征在于，所述换热器在所述循环风道中至少设置一处。
7、根据权利要求1-6任一所述的色轮装置，其特征在于，所述色轮腔体内壁设有用于与所述色轮腔体内气流进行热交换的导热柱；所述波长转换层背光一侧表面设有散热齿。
8、根据权利要求1-6任一所述的色轮装置，其特征在于，色轮模组包括用于承载所述波长转层的色轮基板，所述色轮基板外缘设有沿其圆周分布的散热齿。
9、根据权利要求1-6任一所述的色轮装置，其特征在于，所述循环风道中心处形成两端与外界相连通的散热腔体，所述色轮腔体、换热器第一通道和连接通道环绕散热腔体设置。
10、一种投影机，其特征在于，包括色轮装置和散热风扇，所述散热风扇提供投影机内部气体流动的动力，所述色轮装置为权利要求1-8任一项所述的色轮装置，其中流经所述第二通道的空气由所述散热风扇驱动。
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