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WO2018010485A1 - 一种散热装置及投影设备 - Google Patents

一种散热装置及投影设备 Download PDF

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Publication number
WO2018010485A1
WO2018010485A1 PCT/CN2017/084820 CN2017084820W WO2018010485A1 WO 2018010485 A1 WO2018010485 A1 WO 2018010485A1 CN 2017084820 W CN2017084820 W CN 2017084820W WO 2018010485 A1 WO2018010485 A1 WO 2018010485A1
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WO
WIPO (PCT)
Prior art keywords
heat
housing
air
accommodating
heat source
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.)
Ceased
Application number
PCT/CN2017/084820
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English (en)
French (fr)
Inventor
林伟
谢涛
李屹
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Shenzhen Appotronics Corp Ltd
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Appotronics Corp Ltd
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Publication date
Priority claimed from CN201620730783.3U external-priority patent/CN205942233U/zh
Application filed by Appotronics Corp Ltd filed Critical Appotronics Corp Ltd
Publication of WO2018010485A1 publication Critical patent/WO2018010485A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/16—Cooling; Preventing overheating

Definitions

  • the present application relates to the field of optical display technologies, and in particular, to a heat dissipation device and a projection device.
  • the color wheel is an integral part of the separation and processing of color
  • the light source has a certain loss when processed by the color wheel, especially the laser fluorescent color wheel loss can be up to 30 %
  • the color wheel as a component for processing color itself has a high dustproof requirement, so generally the color wheel will be installed in the sealed cavity, and the loss of the light source in the color wheel portion is converted into heat accumulation inside the cavity, if Without expelling this part of the heat, the internal temperature of the color wheel cavity will become higher and higher, which will affect the color wheel conversion efficiency and life.
  • an external air duct is respectively connected to the heat exchange device at the inlet and outlet of the housing for accommodating the heat source, and a driving device for driving the wind channel is installed in the air passage, and the heat receiving device is accommodated by the heat source.
  • the hot air inside the casing is guided to the heat exchanger for cooling, and then guided back to the housing accommodating the heat source for heat dissipation.
  • the heat dissipating device of the prior art is connected to the housing accommodating the heat source through the two external air passages, so that the heat dissipating device needs to occupy more space, which is disadvantageous to miniaturization of the device.
  • the application provides a heat dissipation device and a projection device with compact structure, space saving and good heat dissipation effect.
  • an embodiment provides a heat dissipating device including a housing that houses a heat source, a fan, an external air duct, and a heat exchanger; the housing that houses the heat source has an air outlet and an air inlet, and the air outlet is disposed to receive the heat source a first side of the housing, the air inlet is disposed on a second side of the housing accommodating the heat source adjacent to the first side of the housing accommodating the heat source, and the housing accommodating the heat source has a built-in air duct, one end of the built-in air duct Connected to the air inlet, the other end of the built-in air duct is located diagonally opposite to the air outlet; the heat exchanger has an air outlet and an air inlet, and the two ends of the external air duct are respectively connected with the air outlet of the housing for accommodating the heat source.
  • the air inlet of the heat exchanger is connected, the air outlet of the heat exchanger is connected to the air inlet of the housing that houses the heat source, and the fan is installed on the external air
  • the housing accommodating the heat source includes a first housing and a second housing, and a partition is disposed between the first housing and the second housing, the first housing and the partition form a built-in air duct, and the second shell
  • the body and the partition form a cavity for accommodating the color wheel
  • the air inlet of the casing accommodating the heat source is located at one end of the built-in air duct, and the other end of the inner air passage has a tuyere communicating with the cavity with respect to the other end of the air inlet.
  • the thickness of the first housing is greater than the thickness of the second housing.
  • the external air duct includes a first air duct and a second air duct that are connected together, the first air duct is connected to the housing that houses the heat source, the second air duct is connected to the heat exchanger, and the fan is installed in the second wind.
  • the height of the heat exchanger is higher than the height of the first air duct.
  • the ratio of the height of the heat exchanger to the height of the first air passage is greater than or equal to 1.1.
  • the length of the heat exchanger is equal to the length of the first air duct.
  • the distance between the heat exchanger and the first air passage is greater than 20 mm.
  • the upper portion or the lower portion of the first air passage is curved, or the upper portion or the lower portion of the first air passage has a concave recess.
  • the heat exchanger and the first air passage are lower than the upper surface of the housing that houses the heat source.
  • the heat source is a fluorescent wheel having a phosphor.
  • a projection apparatus comprising the above-mentioned heat dissipating device and a cooling device of a projection device, wherein the cooling device of the projection device is located on a side of the heat dissipating device remote from the heat exchanger, and is used for driving the airflow in the projection device. The flow.
  • the housing accommodating the heat source is provided with a built-in air duct
  • the built-in air duct guides the air inlet to the position of the diagonal of the air outlet, so that the airflow inside the housing accommodating the heat source flows from the diagonal
  • the air flowing in the diagonal form can avoid the short circuit of the inlet and outlet, and the cold air dead angle does not appear inside the cavity, so the heat dissipation effect is good, and the air inlet and the air outlet are arranged on the same side, and the air inlet can be directly connected with the heat exchanger.
  • the air outlets are docked, eliminating an external passage and reducing the external construction volume of the color wheel heat exchange device, which ultimately makes the structure of the entire device compact, saves space, and facilitates miniaturization.
  • FIG. 1 is a schematic structural view of a heat sink device in an embodiment
  • FIG. 2 is a schematic view showing the structure of a housing accommodating a heat source in an embodiment.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • a heat dissipating device In the embodiment, a heat dissipating device is provided.
  • the heat dissipating device mainly transfers hot air into the heat exchanger through the heat exchange inside the casing accommodating the heat source, converts the hot air into cold air, and then introduces the cold air into the heat receiving device.
  • this cycle realizes rapid heat dissipation of the color wheel in the housing accommodating the heat source.
  • the heat dissipating device of this embodiment is mounted on the color wheel, that is, the color wheel heat dissipating device.
  • the heat sink can be mounted on other devices having a heat source to dissipate heat from the heat source of the device.
  • the heat sink mainly includes a housing 101 that houses a heat source, a fan 102, an external duct 103, and a heat exchanger 104.
  • the heat source is a fluorescent wheel having a phosphor, that is, the heat source is a color wheel
  • the casing 101 accommodating the heat source is a color wheel outer casing.
  • the first surface (the rightward side in FIG. 2) of the casing 101 accommodating the heat source has an air outlet 101a, and a second surface adjacent to the first surface (the downward facing surface in FIG. 2) It has an air inlet 101b.
  • the housing 101 accommodating a heat source includes a first housing 101c and a second housing 101d, and the first housing 101c is an upper housing of the housing 101 accommodating a heat source, and the second housing 101d is The lower half of the casing 101 accommodating the heat source, and the inside of the casing 101 accommodating the heat source is provided with a partition 106.
  • the first casing 101c and the second casing 101d are separated by a partition 106, the partition 106 and The first casing 101c surrounds the built-in air duct 105, and the partition 106 and the second casing 101d surround the cavity in which the color wheel is accommodated.
  • One end of the built-in air duct 105 is connected to the air inlet 101b, and one end of the partition 103 away from the air inlet 101b is provided with a tuyere, and the built-in air duct 105 communicates with the housing 101 accommodating the heat source through the tuyere, and the built-in air duct 105 can be used from the air inlet.
  • the cold air entering 101b is led to the oblique diagonal tuyere of the air outlet 101a, and then introduced into the cavity of the color wheel from the tuyere, so that the cold air flows diagonally in the housing of the color wheel, which has better heat dissipation effect.
  • the thickness of the first casing 101c is greater than the thickness of the second casing 101d, and the wall thickness of the built-in air duct 105 can be set according to actual needs, and the air passage cross-sectional area of the built-in air duct 105 is constant, thereby ensuring airflow in the built-in air duct 105.
  • the smoothness also minimizes the overall size of the housing accommodating the heat source.
  • the outer surface of the housing 101 accommodating the heat source thus formed is a stepped structure, and a space is reserved outside the second housing 101d for The optical components of the color wheel are installed, which saves space and makes the structure more compact.
  • the heat exchanger 104 has an air inlet and an air outlet, and the air outlet of the heat exchanger 104 communicates with the air inlet 101b of the casing 101 that houses the heat source.
  • the external air duct 103 includes a first air passage 103a and a second air passage 103b.
  • the first air passage 103a and the second air passage 103b are connected in a "7" shape, and the first air passage 103a and the housing 101 accommodating the heat source are out.
  • the tuyere 101a is connected, and the second duct 103b is in communication with the air inlet of the heat exchanger 104.
  • the fan 102 is mounted on the second air duct 103b.
  • the fan 102 includes a driving device and a blade. The output end of the driving device is connected to the blade.
  • the blade of the fan 102 is installed in the second air channel 103b.
  • the fan 102 drives the external air channel 103.
  • the air flows to the heat exchanger 104, that is, drives the hot air in the casing 101 accommodating the heat source into the heat exchanger 104 for heat exchange.
  • the height of the heat exchanger 104 is higher than the height of the first air passage 103a, which is the maximum distance from the bottom surface to the top surface of the heat exchanger 104 or the first air passage 103a, and the height of the heat exchanger 104 is the first wind.
  • the height ratio of the track 103a is greater than or equal to 1.1, that is, the height of the first air passage 103a is smaller than the height of the heat exchanger 104, so that the upper end of the first air passage 103a forms a space for the system wind to dissipate heat from the heat exchanger 104.
  • the upper or lower portion of the first air passage 103a is curved, that is, a chamfer is provided at the corners or a smooth transition of the two surfaces is connected, so that the system wind can pass smoothly.
  • the first air passage 103a has a concave structure and is sunk in the middle to provide a larger ventilation space for the system wind.
  • the curved surface structure or the concave structure of the first air passage 103a enhances the heat dissipation effect of the system wind on the heat exchanger 104.
  • the length of the heat exchanger 104 is equal to or approximately equal to the length of the first air passage 103a. It is well known that the larger the area of the heat exchanger 104, the better the heat dissipation, but as the equipment is miniaturized, the heat exchanger 104 is required to be as small as possible. The heat dissipation performance is as large as possible. For this reason, the length of the heat exchanger 104 is set to be equal to the length of the air passage, and the height of the heat exchanger 104 is greater than the height of the first air passage 103a, so that the heat dissipation effect is also better. Achieved the purpose of compact structure.
  • the distance between the heat exchanger 104 and the first air passage 103a has an important influence on the overall heat dissipation flow path setting of the projection device, and the minimum distance between the heat exchanger 104 and the first air passage 103a is greater than It is equal to 20mm, which can ensure the minimum flow resistance of the heat dissipation channel of the projection device, and can also reduce the miniaturization of the heat sink and the efficiency of heat dissipation.
  • the upper surfaces of the heat exchanger 104 and the first air passage 103a are lower than the upper surface of the casing 101 accommodating the heat source, and the upper surfaces of the heat exchanger 104 and the first air passage 103a are flush with the upper surface of the second air passage 103b.
  • the heat exchanger 104 and the first air passage 103a reserve a space for the heat dissipation air passage of the projection device.
  • the air inlet 105 is disposed on the first surface of the casing accommodating the heat source with the air outlet 101a, and the air inlet 101b is disposed in The second surface adjacent to the housing 101 accommodating the heat source leads the outlet of the built-in air duct 105 to a position at a diagonal of the air outlet 101a, so that the airflow inside the housing 101 accommodating the heat source flows diagonally, diagonally
  • the air flowing in the form of a line can avoid the short circuit of the incoming and outgoing air, and the cold air dead angle does not appear inside the cavity, so the heat dissipation effect is good, and the air inlet 101b and the air outlet 101a are disposed on the same side, and the air inlet 101b can directly communicate with the heat exchanger 104.
  • the air outlet is docked, eliminating an external passage, reducing the external construction volume of the color wheel heat exchange device, and finally making the entire
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the embodiment provides a projection device.
  • the projection device includes the heat dissipation device and the heat dissipation fan of the projection device of the above embodiment.
  • the heat dissipation fan of the projection device is located at a side of the heat dissipation device away from the heat exchanger 104 for driving the airflow in the projection device. flow.
  • the upper or lower portion of the first air passage 103a of the heat dissipating device has a curved surface, or the first air passage 103a has a concave structure and is sunk in the middle, which provides a larger ventilation space for the cooling device of the projection device, and improves the heat dissipation of the cooling device of the projection device.
  • the heat dissipation effect of the crashed heat exchanger 104 is a concave structure and is sunk in the middle, which provides a larger ventilation space for the cooling device of the projection device, and improves the heat dissipation of the cooling device of the projection device.
  • the above-mentioned compact heat dissipating device is disposed in the projection device, which can save space inside the projection device, so that the entire projection device can be miniaturized. Moreover, the fan inside the projection device can dissipate heat from the heat exchanger 104 of the heat sink, and the heat exchanger 104 uses the system wind to dissipate heat, thereby eliminating the need for additional air driving devices, and having the effect of energy saving and mute.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
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Abstract

一种散热装置，包括容纳热源的壳体（101）、风扇（102）、外置风道（103）和换热器（104）；容纳热源的壳体（101）具有出风口（101a）和进风口（101b），出风口（101a）设置在容纳热源的壳体（101）的第一面，进风口（101b）设置在与容纳热源的壳体（101）的第一面相邻的第二面，容纳热源的壳体（101）内具有内置风道（105），内置风道（105）的一端与进风口（101b）连接，内置风道（105）的另一端位于相对于出风口（101a）斜对角的位置；换热器（104）具有出风口和进风口，外置风道（103）两端分别与容纳热源的壳体（101）的出风口（101a）和换热器（104）的进风口连接，换热器（104）的出风口与容纳热源的壳体（101）的进风口（101b）连接，风扇（102）安装在外置风道（103）上。由于容纳热源的壳体（101）内设有内置风道（105），内置风道（105）将进风口（101b）引到出风口（101a）对角线处位置，使得容纳热源的壳体（101）散热效果好，整个装置的结构紧凑，节约了使用空间，利于实现小型化。

Description

一种散热装置及投影设备 技术领域
本申请涉及光学显示技术领域，具体涉及一种散热装置及投影设备。
 背景技术
对于单片式和双片式DLP投影机及激光荧光技术而言，色轮是分离和处理色彩的必备部分，光源在经过色轮处理时存在一定损耗尤其是激光荧光色轮损耗可高达30%，而色轮作为处理色彩的元件本身有很高的防尘要求，所以一般而言色轮会被安装在密封腔体内，光源在色轮部分的损耗在腔体内部转换成热量累积，如果不将这部分热量排出，色轮腔体内部温度将会越来越高，从而影响色轮转换效率及寿命。
 技术问题
现有技术中对为了对色轮进行散热，在容纳热源的壳体的进出风口分别安装外部风道与换热装置连接，在风道中安装有用于驱动风流道的驱动装置，通过将容纳热源的壳体内部热空气引导到换热器中冷却，再导回容纳热源的壳体中实现散热。现有技术的散热装置通过两个外部风道与容纳热源的壳体连接使得散热装置需要占用较多空间，不利于设备的小型化。
 技术解决方案
本申请提供一种结构紧凑节约空间且散热效果好的散热装置及投影设备。
一方面，一种实施例中提供一种散热装置，包括容纳热源的壳体、风扇、外置风道和换热器；容纳热源的壳体具有出风口和进风口，出风口设置在容纳热源的壳体的第一面，进风口设置在与容纳热源的壳体的第一面相邻的容纳热源的壳体的第二面，容纳热源的壳体内具有内置风道，内置风道的一端与进风口连接，内置风道的另一端位于相对于出风口斜对角的位置;换热器具有出风口和进风口，外置风道两端分别与容纳热源的壳体的出风口和换热器的进风口连接，换热器的出风口与容纳热源的壳体的进风口连接，风扇安装在外置风道上。
进一步地，容纳热源的壳体包括第一壳体和第二壳体，第一壳体与第二壳体之间设有隔板，第一壳体和隔板形成内置风道，第二壳体和隔板形成容纳色轮的腔体，容纳热源的壳体的进风口位于内置风道的一端，内置风道相对进风口的另一端具有与腔体联通的风口。
进一步地，第一壳体的厚度大于第二壳体的厚度。
进一步地，外置风道包括连接在一起的第一风道和第二风道，第一风道与容纳热源的壳体连接，第二风道与换热器连接，风扇安装在第二风道上，换热器的高度高于第一风道的高度。
进一步地，换热器的高度与第一风道的高度比值大于等于1.1。
进一步地，换热器的长度等于第一风道的长度。
进一步地，换热器与第一风道之间的间距大于20mm。
进一步地，第一风道的上部或者下部呈曲面，或者，第一风道的上部或者下部具有呈内凹的缺口。
进一步地，换热器和第一风道低于容纳热源的壳体的上表面。
进一步地，热源为具有荧光粉的荧光轮。
另一方面，一种实施例中提供了一种投影设备，包括上述的散热装置和投影设备散热风机，投影设备散热风机位于散热装置远离其换热器的一侧，用于驱动投影设备内气流的流动。
 有益效果
依据上述实施例的散热装置，由于容纳热源的壳体内设有内置风道，内置风道将进风口引到出风口对角线处的位置，使得容纳热源的壳体内部气流从对角线流动，对角线形式流动的空气可以避免进、出风短路，腔体内部不会出现冷风死角，故散热效果好，并且进风口和出风口设置在同一侧，进风口可直接与换热器的出风口对接，省去了一个外部通道，减少色轮换热装置的外部构造体积，最终使得整个装置的结构紧凑，节约了使用空间，利于实现小型化。
 附图说明
图1为一种实施例中散热装置的结构示意图；
图2为一种实施例中容纳热源的壳体的结构示意图。
 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：
在本实施例中提供了一种散热装置，散热装置主要通过将容纳热源的壳体内部的热空气抽出到换热器中进行热交换，将热空气转为冷空气，再将冷空气导入容纳热源的壳体中，如此循环实现对容纳热源的壳体内的色轮进行快速散热。本实施例的散热装置安装在色轮上，即为色轮散热装置。在其他实施例中，本散热装置可安装在其他具有热源的设备上，对设备的热源进行散热。
如图1所示，散热装置主要包括容纳热源的壳体101、风扇102、外置风道103和换热器104。其中，热源为具有荧光粉的荧光轮，即热源为色轮，容纳热源的壳体101为色轮外壳。
如图2所述，容纳热源的壳体101的第一面（图2中朝右的面）的具有出风口101a，与第一面相邻的第二面（图2中朝下的面）具有进风口101b。如图1所示，容纳热源的壳体101包括第一壳体101c和第二壳体101d，第一壳体101c为容纳热源的壳体101的上半部分壳体，第二壳体101d为容纳热源的壳体101的下半部分壳体，容纳热源的壳体101的内部设有隔板106，第一壳体101c和第二壳体101d以隔板106为分界线，隔板106和第一壳体101c围合成内置风道105，隔板106和第二壳体101d围合成容纳色轮的腔体。内置风道105的一端与进风口101b相接，隔板103远离进风口101b的一端设有风口，内置风道105与容纳热源的壳体101通过风口联通，内置风道105可将从进风口101b进入的冷空气引至出风口101a的斜对角风口处，再从风口导入到容纳色轮的腔体内，使得冷空气在容纳色轮腔体内沿对角流动，具有更好的散热效果。
第一壳体101c的厚度大于第二壳体101d的厚度，内置风道105的壁厚可根据实际需求设置，并且内置风道105的风道截面积不变，保证了气流在内置风道105的平稳同时也使得容纳热源的壳体的整体尺寸达到最小化，另外，如此形成的容纳热源的壳体101的外表面为阶梯装的结构，在第二壳体101d外部预留了空间用于安装色轮的光学部件，有效节省了空间，使得结构更加紧凑。
换热器104具有进风口和出风口，换热器104的出风口与容纳热源的壳体101的进风口101b联通。
外置风道103包括第一风道103a和第二风道103b，第一风道103a和第二风道103b成“7”字形连接，第一风道103a与容纳热源的壳体101的出风口101a联通，第二风道103b与换热器104的进风口联通。风扇102安装在第二风道103b上，风扇102包括驱动装置和叶片，驱动装置的输出端与叶片连接，风扇102的叶片安装在第二风道103b内，风扇102驱动外置风道103内的空气流向换热器104，即驱动将容纳热源的壳体101内的热空气抽到换热器104中进行热交换。
换热器104的高度高于第一风道103a的高度，该高度是指换热器104或者第一风道103a的底面至顶面的最大距离，并且换热器104的高度与第一风道103a的高度比值大于等于1.1，即第一风道103a的高度小于换热器104的高度，使得第一风道103a上端形成一定空间用于系统风通过对换热器104进行散热。为了提高系统风对换热器104的散热效果，第一风道103a的上部或者下部呈曲面，即在棱角处设置倒角或者连接两个面的部分光滑过渡，使得系统风能够更顺畅的通过第一风道103a。或者第一风道103a呈凹型结构，中间下沉，给系统风提供更大的通风空间。第一风道103a的曲面结构或者凹型结构都提高了系统风对换热器104的散热效果。
换热器104的长度等于或者近似等于第一风道103a的长度，众所周知换热器104面积越大越利于散热，但是随着设备的小型化，要求换热器104要在尽可能小的的情况下尽可能大的发挥散热性能，为此，将换热器104的长度设置成跟风道长度相等，换热器104的高度大于第一风道103a的高度，较好的起到了散热作用同时也达到了结构紧凑的目的。
通过发明人长期的研究发现换热器104与第一风道103a之间的间距对投影设备的整体散热流道设置具有重要影响，换热器104与第一风道103a之间的最小间距大于等于20mm，容如此既能保证投影设备散热流道整体流阻最小，也能使得散热装置的小型化和散热的高效化。
换热器104与第一风道103a上表面均低于容纳热源的壳体101上表面，换热器104与第一风道103a的上表面与第二风道103b的上表面平齐。换热器104与第一风道103a预留一个投影设备散热风道的空间。
本实施例提供的散热装置，由于容纳热源的壳体101内设有内置风道105，内置风道105将与出风口101a设置在容纳热源的壳体的第一面，进风口101b设置在与容纳热源的壳体101相邻的第二面，将内置风道105的出口引到该出风口101a对角线处的位置，使得容纳热源的壳体101内部气流从对角线流动，对角线形式流动的空气可以避免进、出风短路，腔体内部不会出现冷风死角，故散热效果好，并且进风口101b和出风口101a设置在同一侧，进风口101b可直接与换热器104的出风口对接，省去了一个外部通道，减少色轮换热装置的外部构造体积，最终使得整个色轮换热装置结构紧凑，节约了使用空间，利于整个装置的小型化。
实施例二：
本实施例提供了一种投影设备，投影设备包括上述实施例的散热装置和投影设备散热风机，投影设备散热风机位于散热装置远离其换热器104的一侧，用于驱动投影设备内气流的流动。散热装置的第一风道103a的上部或者下部呈曲面，或者第一风道103a呈凹型结构，中间下沉，给投影设备散热风机提供了更大的通风空间，提高了投影设备散热风机对散热撞的换热器104的散热效果。投影设备内设置上述结构紧凑的散热装置，可节约投影设备内部的空间，从而整个投影设备可实现小型化设计。并且投影设备内部的风扇可对散热装置的换热器104进行散热，换热器104利用系统风进行散热，从而不用增加额外的空气驱动装置，有节能、静音的效果。
以上应用了具体个例对本发明进行阐述，只是用于帮助理解本发明，并不用以限制本发明。对于本发明所属技术领域的技术人员，依据本发明的思想，还可以做出若干简单推演、变形或替换。

Claims (11)

1. 一种散热装置，其特征在于，包括容纳热源的壳体、流体动力源、外置风道和换热器；所述容纳热源的壳体具有出风口和进风口，所述出风口设置在所述容纳热源的壳体的第一面，所述进风口设置在与所述容纳热源的壳体的第一面相邻的所述容纳热源的壳体的第二面，所述容纳热源的壳体内具有内置风道，所述内置风道的一端与所述进风口联通，所述内置风道的另一端位于相对于所述出风口斜对角的位置;换热器具有出风口和进风口，所述外置风道两端分别与所述容纳热源的壳体的出风口和所述换热器的进风口联通，所述换热器的出风口与所述容纳热源的壳体的进风口联通，所述流体动力源安装在所述外置风道中。
2. 如权利要求1所述的散热装置，其特征在于，所述容纳热源的壳体包括第一壳体和第二壳体，所述第一壳体与第二壳体之间设有隔板，所述第一壳体和隔板形成所述内置风道，所述第二壳体和隔板形成容纳色轮的腔体，所述容纳热源的壳体的进风口位于所述内置风道的一端，所述内置风道相对所述壳体的进风口的另一端具有与所述腔体联通的风口。
3. 如权利要求2所述的散热装置，其特征在于，所述第一壳体的厚度大于所述第二壳体的厚度。
4. 如权利要求1或3所述的散热装置，其特征在于，所述外置风道包括联通的第一风道和第二风道，所述第一风道与容纳热源的壳体联通，所述第二风道与换热器联通，所述流体动力源安装在所述第二风道上，所述换热器的高度高于所述第一风道的高度。
5. 如权利要求4所述的散热装置，其特征在于，所述换热器的高度与所述第一风道的高度比值大于等于1.1，所述换热器与所述第一风道相对。
6. 如权利要求5所述的散热装置，其特征在于，所述换热器的长度等于所述第一风道的长度。
7. 如权利要求6所述的散热装置，其特征在于，所述换热器与所述第一风道之间的间距大于20mm。
8. 如权利要求7所述的散热装置，其特征在于，所述第一风道的上部或者下部呈曲面，或者，所述第一风道的上部或者下部具有呈内凹的缺口。
9. 如权利要求8所述的散热装置，其特征在于，所述换热器和第一风道低于所述容纳热源的壳体的上表面。
10. 如权利要求1至9任一项所述的散热装置，其特征在于，所述热源为具有荧光粉的荧光轮。
11. 一种投影设备，其特征在于，包括权利要求1至10中任一项所述的散热装置和投影设备散热风机，所述投影设备散热风机位于所述散热装置远离其换热器的一侧，用于驱动投影设备内气流的流动。
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