WO2017166967A1 - 投影设备及其液冷散热系统 - Google Patents

投影设备及其液冷散热系统 Download PDF

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Publication number
WO2017166967A1
WO2017166967A1 PCT/CN2017/074958 CN2017074958W WO2017166967A1 WO 2017166967 A1 WO2017166967 A1 WO 2017166967A1 CN 2017074958 W CN2017074958 W CN 2017074958W WO 2017166967 A1 WO2017166967 A1 WO 2017166967A1
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WIPO (PCT)
Prior art keywords
medium
water pump
cooling
liquid
heat exchanger
Prior art date
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Ceased
Application number
PCT/CN2017/074958
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English (en)
French (fr)
Inventor
谢涛
林伟
李屹
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Shenzhen Appotronics Corp Ltd
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Appotronics Corp Ltd
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Publication of WO2017166967A1 publication Critical patent/WO2017166967A1/zh
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating

Definitions

  • the utility model relates to the technical field of heat dissipation of a projection device, and more particularly to a projection device and a liquid cooling system thereof.
  • the heat dissipation system of the projection device has two types: air-cooling heat dissipation and liquid-cooling heat dissipation.
  • the liquid-cooling heat dissipation is mainly applied to a high-brightness projection device, and the liquid-cooling heat dissipation system mainly includes: a water pump, a water-cooled plate and a switch which are connected in series and form a closed circuit.
  • the heat exchanger wherein the circulating fluid of the cooling liquid is realized by the water pump, the heat-generating component is dissipated by the water-cooling plate, and the cooling liquid is cooled by the heat exchanger.
  • the above problem is solved by adding a water tank 13. Specifically, as shown in FIG. 1, the water pump 11, the water-cooling plate 12, the water tank 13, and the heat exchanger 14 are sequentially connected in series. After installation, the water tank 13 is located at the highest position of the liquid cooling system along the gravity direction, the water pump 11 is at the lowest position of the liquid cooling system, the water pump 11 is filled with the coolant, the bubbles move upward by gravity and finally collect at the top of the water tank 13. So that bubbles do not collect in the water pump 11.
  • the liquid cooling system described above when the liquid cooling system described above is installed in reverse, the water pump 11 is at the highest point, the water tank 13 is at the lowest point, and the air bubbles are collected in the water pump 11.
  • the above-mentioned liquid cooling and cooling system is installed in the only direction, which makes it suitable only for the projection device with the only installation direction, and is not applicable to projection devices that require 360° free installation, such as engineering projection equipment.
  • the present invention provides the following technical solutions:
  • a liquid cooling heat dissipation system for a projection apparatus comprising: a pipe, a water pump, a cooling plate and a heat exchanger, wherein the water pump, the cooling plate and the heat exchanger are connected by the pipe, the pipe, the water pump And the cooling plate and the medium cavity of the heat exchanger are connected to form a closed circuit for circulating the cooling liquid;
  • At least a portion of a medium cavity in the closed circuit is located on a side of the medium volume of the water pump, and at least a portion of a medium cavity in the closed circuit is located in the The other side of the medium chamber of the pump.
  • the heat exchanger and the cooling plate are respectively located on both sides of the water pump;
  • a portion of the medium volume of at least one of the heat exchanger and the cooling plate is located on a side of the medium cavity of the water pump, and a portion of the medium cavity of at least one of the heat medium and the cooling plate is located The other side of the medium chamber of the water pump;
  • a portion of the medium volume of at least one of the heat exchanger and the cooling plate is located on a side of the medium chamber of the water pump, and a portion of the medium volume of at least one of the heat medium is located The other side of the medium chamber of the water pump;
  • the Y direction, the X direction and the Z direction are perpendicular to each other.
  • the cooling plate comprises at least two cooling sub-plates connected in series.
  • the cooling plate comprises three cooling sub-plates connected in series, which are a first cooling sub-board, a second cooling sub-board and a third cooling sub-plate;
  • a portion of the medium volume of the heat exchanger and a medium volume of the third cooling sub-plate are located on a side of the medium chamber of the water pump, and a medium capacity of the second cooling sub-board a portion of the cavity is located on the other side of the medium volume of the water pump;
  • a portion of the medium volume of the heat exchanger is located on one side of the medium chamber of the water pump, and a medium chamber of the first cooling partition is located on the other side of the medium chamber of the water pump.
  • the medium cavity of the extension being in communication with the medium cavity in the closed loop
  • the medium volume of the water pump protrudes from the duct, the water pump, the cooling plate, and the medium cavity of the heat exchanger, and the medium cavity of the extension protrudes from the The medium volume of the pump.
  • the medium volume of the extension has only an extension inlet, and any one of the closed loops communicates with the medium chamber of the extension through the extension inlet.
  • the medium volume of the extension has an extension inlet and an extension outlet, and any two medium chambers in the closed loop pass through the extension inlet and the extension outlet respectively to the medium cavity of the extension Connected.
  • the extension inlet is in communication with a medium volume of the heat exchanger, the extension outlet being in communication with a medium volume of the water pump through a medium volume of the conduit.
  • At least one of the pipes comprises: a metal pipe section and two joint pipe sections, wherein the two joint pipe sections respectively communicate with both ends of the metal pipe section, and the joint pipe section is a rubber pipe or a plastic pipe.
  • the liquid cooling system of the above projection device further comprises: a fan that blows the heat exchanger.
  • the liquid-cooling heat dissipation system of the above-mentioned projection apparatus further includes an automatic liquid replenisher, the automatic liquid replenisher comprising: a liquid storage portion for storing the cooling liquid, and a pressure maintaining portion connected to the liquid storage portion; wherein A reservoir is in communication with a medium volume in the closed circuit, the pressure maintaining portion for maintaining a pressure within the reservoir and a pressure within a chamber of the closed circuit.
  • an automatic liquid replenisher comprising: a liquid storage portion for storing the cooling liquid, and a pressure maintaining portion connected to the liquid storage portion; wherein A reservoir is in communication with a medium volume in the closed circuit, the pressure maintaining portion for maintaining a pressure within the reservoir and a pressure within a chamber of the closed circuit.
  • the liquid storage portion is in communication with the heat exchanger.
  • the liquid storage portion includes: a liquid storage housing, a sliding plate slidably disposed inside the liquid storage housing; wherein the sliding plate is sealingly connected with the housing and forms a storage for the storage medium Liquid chamber
  • the pressure maintaining portion includes: a maintaining portion housing connected to the liquid storage case; a pressure maintaining spring provided in the maintaining portion housing; wherein one end of the pressure maintaining spring is fixed to the maintaining portion shell The other end of the pressure maintaining spring is fixedly connected to the sliding plate.
  • the present invention further provides a projection device including a liquid cooling heat dissipation system, wherein the liquid cooling heat dissipation system is the liquid of the projection device according to any one of the above items, based on the liquid cooling heat dissipation system of the projection device provided above. Cold cooling system.
  • the liquid cooling heat dissipating system of the projection device provided by the utility model has a partial medium cavity in one side of the water pump cavity body in any direction, and a part of the medium heat capacity component is located in the water pump cavity body. On one side, the pump cavity will not be at the top of the entire liquid cooling system in either direction, thus avoiding the accumulation of air bubbles in the pump, thereby avoiding the accumulation of air bubbles in the pump in a 360° freely mounted projection device.
  • FIG. 1 is a schematic structural view of a liquid cooling heat dissipation system of a projection apparatus provided by the prior art
  • FIG. 2 is a first structural schematic diagram of a liquid cooling heat dissipation system of a projection apparatus according to an embodiment of the present invention
  • Figure 3 is a front elevational view of the liquid cooling system of the projection apparatus of Figure 2;
  • FIG. 4 is a second schematic structural diagram of a liquid cooling heat dissipation system of a projection apparatus according to an embodiment of the present invention
  • FIG. 5 is a third structural schematic diagram of a liquid cooling heat dissipation system of a projection apparatus according to an embodiment of the present invention.
  • Figure 6 is a schematic view showing the internal communication of the auxiliary device and the heat exchanger of Figure 5;
  • FIG. 7 is a schematic structural diagram of a projection apparatus according to an embodiment of the present invention.
  • FIG. 8 is another schematic structural diagram of a projection apparatus according to an embodiment of the present invention.
  • 11 is a water pump
  • 12 is a cooling plate
  • 13 is a water tank
  • 14 is a heat exchanger
  • 21 is a water pump
  • 22 is a third cooling sub-plate
  • 23 is a second cooling sub-plate
  • 24 is a first cooling sub-board
  • 25 is a fan
  • 26 is a heat exchanger
  • 261 is a heat exchanger inlet
  • 262 is a heat exchange tube
  • 27 is a pipe
  • 271 is a metal pipe section
  • 272 is a joint pipe section
  • 28 is an automatic liquid accumulator
  • 29 is an extension part
  • 291 is an extension outlet
  • 210 is a light source module
  • 211 is a color wheel module
  • 212 is a light machine module
  • 213 is a lens module.
  • the liquid cooling heat dissipation system of the projection device provided by the embodiment of the present invention comprises: a pipe 27, a water pump 21, a cooling plate and a heat exchanger 26, and the water pump 21, the cooling plate and the heat exchanger 26 are connected by a pipe 27, a pipe 27, a water pump 21.
  • the cooling plate and the medium volume of the heat exchanger 26 are in communication to form a closed circuit for the flow of the coolant.
  • At least a portion of a medium volume in the closed circuit is located on a side of the medium volume of the water pump 21, and at least a portion of a medium volume in the closed circuit is located in the medium capacity of the water pump 21.
  • the other side of the cavity is located on a side of the medium volume of the water pump 21, and at least a portion of a medium volume in the closed circuit is located in the medium capacity of the water pump 21.
  • the medium chamber side of the water pump 21 and the other side of the medium chamber of the water pump 21 are the opposite sides of the medium chamber of the water pump 21 in this direction.
  • At least one part of a medium volume in the closed circuit is located on the side of the medium volume of the water pump 21 in any direction, for example, a medium in the closed circuit
  • a portion of the cavity is located on the side of the medium chamber of the water pump 21
  • a medium in the closed circuit is located on the side of the medium chamber of the water pump 21
  • a portion of the at least two medium chambers in the closed circuit is located in the medium chamber of the water pump 21.
  • At least two medium chambers in one side, closed loop are located on the medium chamber side of the water pump 21, or a portion of the at least one medium chamber in the closed loop is located on the medium chamber side of the water pump 21 and at least one medium in the closed loop
  • the cavity is located on the side of the medium chamber of the water pump 21.
  • a portion of a medium volume in the closed circuit is located on the other side of the medium volume of the water pump 21, and there are various cases as described above. Specifically, a portion of a medium volume in the closed circuit is located on the other side of the medium volume of the water pump 21, a medium in the closed circuit is located on the other side of the medium volume of the water pump 21, and at least two medium chambers in the closed circuit A portion of the portion of the water pump 21 is located on the other side of the medium volume of the water pump 21, at least two of the medium chambers of the closed circuit are located on the other side of the medium chamber of the water pump 21, or a portion of the at least one medium chamber of the closed circuit is located at the water pump 21 The other side of the medium chamber and at least one of the medium chambers in the closed circuit are located on the other side of the medium chamber of the water pump 21.
  • the liquid cooling heat dissipating system of the projection device has at least a portion of a medium cavity in the closed circuit located on one side of the medium cavity of the water pump 21 in any direction, and has at least a closed loop.
  • a part of a medium cavity is located on the other side of the medium volume of the water pump 21, and in any direction, the medium volume of the water pump 21 is not at the top of the entire liquid cooling system, thereby preventing air bubbles from being inside the water pump 21. Aggregation, in turn, avoids the accumulation of air bubbles in the water pump 21 in a 360° freely mounted projection apparatus.
  • the heat exchanger 26 and the cooling plate are respectively located on both sides of the water pump 21 in the Y direction; the heat exchanger 26 and the cold plate along the Z direction.
  • At least one portion of the medium volume is located on the side of the medium chamber of the water pump 21, and a portion of the medium chamber of at least one of the portions is located on the other side of the medium chamber of the water pump 21; along the X direction, the heat exchanger 26 and a portion of the cooling plate, at least one of the medium chambers is located on the side of the medium chamber of the water pump 21, and a portion of the medium chamber of at least one of the portions is located on the other side of the medium chamber of the water pump 21, as shown in FIG. And Figure 4 shows.
  • the Y direction, the X direction and the Z direction are perpendicular to each other, that is, the Y direction is perpendicular to the X direction, the Y direction is perpendicular to the Z direction, and the X direction is perpendicular to the Z direction.
  • the axial direction of the fan 25 is the Y direction
  • the longitudinal direction of the third cooling partition 22 is the X direction, that is, the horizontal direction in FIG. 3
  • the thickness direction of the third cooling partition 22 is Z direction, which is the vertical direction in FIG.
  • the water pump 21 is located between the heat exchanger 26 and the cooling plate, as shown in FIGS. 2 and 4, that is, the medium volume of the water pump 21 is located in the medium volume of the heat exchanger 26. Between the medium chamber of the cooling plate, the medium volume of the water pump 21 is not located at the highest position of the entire liquid cooling system, so that the bubbles do not collect in the water pump 21.
  • the medium volume of the water pump 21 is located between a portion of the medium volume of the heat exchanger 26 and a portion of the medium volume of the cooling plate, or the medium volume of the water pump 21 is located at the heat exchange.
  • the medium volume of the medium chamber or the medium chamber of the water pump 21 is located in the middle of the medium volume of the heat exchanger 26 and is located in the middle of the medium volume of the cooling plate, that is, the medium volume of the water pump 21 is not located in the entire liquid cooling system. The highest position allows the bubbles to no longer collect in the water pump 21.
  • the medium volume of the water pump 21 is located between a portion of the medium volume of the heat exchanger 26 and a portion of the medium volume of the cooling plate, or the medium volume of the water pump 21 is in heat exchange. Between the portion of the medium chamber of the device 26 and a portion of the medium chamber of the cooling plate, or the medium chamber of the water pump 21 is located in the middle of the medium chamber of the heat exchanger 26, or the medium chamber of the water pump 21 is located at the cooling plate The middle of the medium chamber, or the medium chamber of the water pump 21 is located in the middle of the medium chamber of the heat exchanger 26 and located in the middle of the medium chamber of the cooling plate, that is, the pump chamber is not located at the highest position of the entire liquid cooling system. The bubbles are prevented from accumulating in the water pump 21.
  • the liquid cooling device of the above-mentioned projection device may also select two parts of the medium cavity of the heat exchanger 26 and a part of the medium cavity of the cooling plate respectively located in the medium cavity of the water pump 21 in the Y direction.
  • the side, or the medium chamber of the heat exchanger 26 and the portion of the medium chamber of the cooling plate are respectively located on both sides of the water pump chamber, and are not limited to the above embodiment.
  • the cooling plate includes at least two cooling sub-plates connected in series.
  • the number of the cooling sub-boards is designed according to the number of the heat-generating components 29 that need to dissipate heat, which is not limited by the embodiment of the present invention.
  • the cooling plate includes three cooling sub-plates connected in series, which are a first cooling sub-board 24, a second cooling sub-board 23, and a third cooling sub-board 22.
  • a portion of the medium volume of the heat exchanger 26 and a medium volume of the third cooling sub-plate 22 are located on the side of the medium chamber of the water pump 21, and the second cooling A portion of the medium volume of the partition plate 23 is located on the other side of the medium volume of the water pump 21; in the X direction, a portion of the medium volume of the heat exchanger 26 is located on the side of the medium chamber of the water pump 21, and the first cooling point
  • the medium volume of the plate 24 is located on the other side of the medium volume of the water pump 21.
  • part of the medium volume of the first cooling sub-board 24, the second cooling sub-board 23, and the third cooling sub-plate 22 may be selected to be located in the medium capacity of the water pump 21.
  • the top surface of the cavity on the other side of the cavity is shown in Figure 3.
  • the heat dissipation system of the projection device further includes an extension portion 29, the medium cavity of the extension portion 29 is in communication with the medium cavity in the closed circuit; wherein, in one direction, the medium cavity of the water pump 21 protrudes from the pipe 27, The water volume of the water pump 21, the cooling plate and the heat exchanger 26, and the medium volume of the extension 29 protrudes from the medium volume of the water pump 21.
  • the medium volume of the water pump 21 in a certain direction is at the highest position of the entire heat dissipation system, and the medium volume of the extension portion 29 can be increased in the direction to extend the portion 29 in the direction.
  • the medium cavity protrudes from the medium volume of the water pump 21, so that the medium volume of the water pump 21 is not in the highest position of the entire liquid cooling system in this direction, which is convenient for the purpose and convenient for production and manufacture.
  • the medium volume of the extension portion 29 can communicate with a medium volume in the closed loop, and can also communicate with two medium chambers in the closed loop.
  • the media volume of the extension 29 is preferably only provided with an extension inlet, and any one of the closed loops communicates with the media volume of the extension 29 through the extension inlet.
  • the medium volume of the heat exchanger 26 can be selected to communicate with the medium chamber of the extension portion 29 through the extension inlet, and the medium volume of the cooling plate can be selected to extend through the inlet and the medium portion of the extension portion 29.
  • the chamber is in communication, and the medium chamber of the optional tube 27 is in communication with the medium chamber of the extension portion 29 through the extension inlet.
  • the medium chamber of the water pump 21 can be selected to communicate with the medium chamber of the extension portion 29 through the extension inlet.
  • the medium chamber of the extension portion 29 is preferably provided with an extension inlet and an extension outlet 291, and any two medium chambers in the closed loop are respectively connected to the medium chamber of the extension portion 29 through the extension inlet and the extension outlet 291, respectively.
  • the extension 29 can be connected in parallel with one of the components in the closed loop or in series in the closed loop. Further, the extensions 29 are preferentially connected in series in a closed loop.
  • the extension 29 can be connected in series between the heat exchanger 26 and the pipe 27, between the two pipes 27, between the water pump 21 and the pipe 27, between the water-cooled plate and the pipe, and the like.
  • the extension inlet is in communication with the medium chamber of the heat exchanger 26, and the extension outlet 291 communicates with the medium chamber of the water pump 21 through the medium chamber of the conduit 27, as shown in FIG.
  • the heat exchanger 26 is a component commonly used by those skilled in the art, and the specific structure of the heat exchanger 26 can be designed according to actual needs.
  • the heat exchanger 26 includes a heat exchange housing, and a heat exchange tube 262 located in the heat exchange housing.
  • the coolant flows through the heat exchange tubes 262.
  • the number and distribution of the heat exchange tubes 262 can be designed according to the heat exchange requirements, which is not limited by the embodiment of the present invention.
  • the medium volume of the extending portion 29 may be a housing cavity or a tubular body cavity, which is not limited by the embodiment of the present invention.
  • the medium cavity of the above extension portion 29 is a housing cavity, as shown in FIG.
  • the pipe 27 is selected as a plastic pipe or a rubber pipe, but the water vapor permeability coefficient and the gas permeability of the plastic pipe and the rubber pipe are both low, resulting in a large evapotranspiration loss of the entire liquid cooling system.
  • at least one conduit 27 comprising: a metal pipe section 271 and two joint pipe sections 272, wherein the two joint pipe sections 272 are respectively in communication with both ends of the metal pipe section 271, and the joint pipe section 272 is rubber Tube or plastic tube, as shown in Figures 2 and 4.
  • the metal pipe has a lower permeability coefficient and gas permeability than the plastic pipe and the rubber pipe, the evapotranspiration is effectively reduced.
  • the liquid cooling heat dissipation system of the above projection apparatus includes a fan 25 that blows heat to the heat exchanger 26, as shown in FIGS. 2-4 and 5.
  • the type and number of the fan 25 can be selected according to actual needs, which is not limited by the embodiment of the present invention.
  • the liquid cooling system of the above projection apparatus further includes an automatic liquid accumulator 28, as shown in FIG. 4 and FIG. 5, the automatic liquid accumulator 28 includes: a liquid storage portion for storing the cooling liquid, and is connected to the liquid storage portion. a pressure maintaining portion; wherein the liquid storage portion is in communication with the medium chamber in the closed circuit, and the pressure maintaining portion is configured to maintain the pressure in the liquid storage portion and the pressure in the medium volume in the closed circuit.
  • the automatic liquid accumulator 28 injects the liquid in the liquid storage portion into the liquid cooling circulation system under the action of the pressure maintaining portion; thereby ensuring the heat dissipation performance of the entire liquid cooling system and At the same time, when the automatic liquid accumulator 28 is in the lower position, the liquid replenishment can also be realized due to the presence of the pressure maintaining portion, and is suitable for any mounting direction.
  • the liquid storage portion is in communication with the medium cavity in the closed circuit. Specifically, the liquid storage portion communicates with the medium cavity in the closed circuit through the pipe 27, and the liquid storage portion can be selectively connected to the medium cavity of the heat exchanger 26, Optionally, it can be connected to the medium chamber of the cooling plate. In order to facilitate the installation, the liquid storage portion is preferentially connected to the medium chamber of the heat exchanger 26.
  • the pressure maintaining portion of the automatic liquid accumulator 28 has various structures.
  • the liquid storage portion preferably includes: a liquid storage housing, a sliding plate slidably disposed inside the liquid storage housing; wherein the sliding plate is sealingly connected with the housing and forming a liquid storage chamber for the storage medium; the pressure is maintained
  • the portion includes: a maintaining portion housing connected to the liquid storage case, and a pressure maintaining spring disposed on the maintaining portion housing; wherein one end of the pressure maintaining spring is fixed to the maintaining portion housing, and the other end of the pressure maintaining spring is fixedly connected with the sliding plate .
  • the pressure maintaining spring is a compression spring, and the compression amount of the compression spring can be designed according to actual needs, which is not limited by the embodiment of the present invention.
  • the pressure in the liquid storage portion is the same as the pressure in the medium volume in the closed circuit.
  • the pressure in the liquid storage portion is high, and the pressure maintains the spring to push the partition.
  • the plate moves, the liquid in the liquid storage portion flows to the heat exchange component, and when the pressure is balanced, the liquid is not replenished.
  • the pressure maintaining spring with a pressurized gas.
  • the force of the pressure gas to the partition plate is the same as the force of the liquid in the liquid storage portion to the partition plate, and the pressure in the liquid storage portion is in the closed loop.
  • the pressure in the medium cavity is the same.
  • the pressure in the medium volume in the closed circuit is low, the pressure in the liquid storage portion is high, the pressure gas pushes the partition to move, and the liquid in the liquid storage portion flows to the heat exchange component.
  • no rehydration is required.
  • the liquid cooling system of the above projection apparatus may also select the automatic liquid charger 28 as other structures, and is not limited to the above embodiment.
  • the embodiment of the present invention further provides a projection apparatus, which includes a liquid cooling heat dissipation system, and the liquid cooling heat dissipation system is the projection apparatus described in the above embodiment. Liquid cooling system.
  • the liquid-cooling heat-dissipating system of the projection apparatus provided by the above embodiments has the above-mentioned technical effects.
  • the projection apparatus provided by the embodiment of the present invention has the liquid-cooling heat-dissipating system of the above-mentioned projection apparatus, and the projection apparatus provided by the embodiment of the present invention also has corresponding The technical effects will not be described in this article.
  • the third cooling sub-board 22 and the second cooling sub-board 22 are respectively located on both sides of the light source module 210 and are matched with the light source module 210, and the water pump is arranged.
  • 21 is located on a side of the light source module 210 away from the lens module 213.
  • the first cooling sub-board 24 is located between the optical module 212 and the color wheel module 211.
  • the fan 25 and the heat exchanger 26 are both located in the color wheel module 211. Keep away from the side of the first cooling sub-board 24.
  • the first cooling sub-board 24 simultaneously cools the optical module 212 and the color wheel module 211, reduces cooling components, simplifies the structure, and facilitates reduction of the entire projection device. volume.
  • the fan 25 is located on both sides of the heat exchanger 26 to enhance heat exchange with the heat exchanger 26.
  • the heat exchanger 26 is provided with a fan 25 near one side of the water pump 21 and one side away from the water pump 21.

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Projection Apparatus (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)

Abstract

本实用新型公开了一种投影设备及其液冷散热系统，该投影设备的液冷散热系统包括：管道、水泵、冷却板和换热器，管道、水泵、冷却板和换热器的介质容腔连通而形成供冷却液流通的闭合回路；沿任一方向，至少有闭合回路中的一介质容腔的部分部位位于水泵的介质容腔一侧，且至少有闭合回路中的一介质容腔的部分部分位于水泵的介质容腔另一侧。本实用新型公开的投影设备的液冷散热系统，由于沿任一方向，换热组件有部分介质容腔位于水泵腔体的一侧，且换热组件有部分介质容腔位于水泵腔体的另一侧，则在任一方向上水泵腔体都不会在整个液冷散热系统的顶端，从而避免了气泡在水泵内聚集，进而在360°自由安装的投影设备中避免了气泡在水泵内聚集。

Description

投影设备及其液冷散热系统 技术领域
本实用新型涉及投影设备散热技术领域，更具体地说，涉及一种投影设备及其液冷散热系统。
 背景技术
投影设备的散热系统有风冷散热和液冷散热两种，其中，液冷散热主要应用于高亮度的投影设备，该液冷散热系统主要包括：串联且形成封闭回路的水泵、水冷板和换热器，其中，通过水泵实现冷却液的循环流动，通过水冷板对发热元件进行散热，通过换热器对冷却液进行降温。
 技术问题
上述液冷散热系统中不可避免地会出现气泡，而气泡较易损坏系统元件，特别是水泵，气泡会对水泵造成气蚀、空转，导致水泵的噪音、振动加大，水泵的性能下降直至损坏。因此，如何让气泡不在水泵内集聚是液冷散热系统的一个重大难题。
目前，采用增设水箱13的方式来解决上述问题，具体地，如图1所示，水泵11、水冷板12、水箱13与换热器14依次串接。安装后，沿重力方向水箱13位于液冷散热系统的最高位置、水泵11位于液冷散热系统的最低位置，水泵11被冷却液充满，气泡在重力作用下向上移动并最终汇集在水箱13的顶部，使得气泡不会聚集在水泵11中。
但是，当上述液冷散热系统反向安装时，水泵11位于最高点，水箱13位于最低点，气泡会聚集在水泵11内。很显然，上述液冷散热系统的安装方向唯一，导致其仅适用于安装方向唯一的投影设备，而对于需要360°自由安装的投影设备，例如工程投影设备，无法适用。
综上所述，如何设计液冷散热系统，以在360°自由安装的投影设备中避免气泡在水泵内聚集，是目前本领域技术人员亟待解决的问题。
 技术解决方案
有鉴于此，本实用新型的目的是提供一种投影设备的液冷散热系统，以在360°自由安装的投影设备中避免气泡在水泵内聚集。
为了达到上述目的，本实用新型提供如下技术方案：
一种投影设备的液冷散热系统，包括：管道、水泵、冷却板和换热器，所述水泵、所述冷却板和所述换热器通过所述管道连接，所述管道、所述水泵、所述冷却板和所述换热器的介质容腔连通而形成供冷却液流通的闭合回路；
沿任一方向，至少有所述闭合回路中的一介质容腔的部分部位位于所述水泵的介质容腔一侧，且至少有所述闭合回路中的一介质容腔的部分部分位于所述水泵的介质容腔另一侧。
优选地，沿Y向，所述换热器和所述冷却板分别位于所述水泵的两侧；
沿Z向，所述换热器和所述冷却板中，至少一者的介质容腔的部分部位位于所述水泵的介质容腔一侧，至少一者的介质容腔的部分部位位于所述水泵的介质容腔另一侧；
沿X向，所述换热器和所述冷却板中，至少一者的介质容腔的部分部位位于所述水泵的介质容腔一侧，至少一者的介质容腔的部分部位位于所述水泵的介质容腔另一侧；
其中，所述Y向、所述X向和所述Z向两两垂直。
优选地，所述冷却板包括至少两个串联的冷却分板。
优选地，所述冷却板包括三个串联的冷却分板，分别为第一冷却分板、第二冷却分板和第三冷却分板；
沿Z向，所述换热器的介质容腔的部分部位和所述第三冷却分板的介质容腔均位于所述水泵的介质容腔一侧，所述第二冷却分板的介质容腔的部分部位位于所述水泵的介质容腔另一侧；
沿X向，所述换热器的介质容腔的部分部位位于所述水泵的介质容腔一侧，所述第一冷却分板的介质容腔位于所述水泵的介质容腔另一侧。
优选地，还包括延伸部，所述延伸部的介质容腔与所述闭合回路中的介质容腔连通；
其中，沿一方向，所述水泵的介质容腔突出于所述管道、所述水泵、所述冷却板和所述换热器的介质容腔，且所述延伸部的介质容腔突出于所述水泵的介质容腔。
优选地，所述延伸部的介质容腔仅具有延伸进口，所述闭合回路中的任意一个介质容腔通过所述延伸进口与所述延伸部的介质容腔连通。
优选地，所述延伸部的介质容腔具有延伸进口和延伸出口，所述闭合回路中的任意两个介质容腔分别通过所述延伸进口和所述延伸出口与所述延伸部的介质容腔连通。
优选地，所述延伸进口与所述换热器的介质容腔连通，所述延伸出口通过所述管道的介质容腔与所述水泵的介质容腔连通。
优选地，至少一个所述管道包括：金属管段和两个接头管段，其中，两个所述接头管段分别与所述金属管段的两端连通，所述接头管段为橡胶管或者塑料管。
优选地，上述投影设备的液冷散热系统还包括：向所述换热器吹风的风扇。
优选地，上述投影设备的液冷散热系统还包括自动补液器，所述自动补液器包括：用于储存冷却液的储液部，与所述储液部相连的压力维持部；其中，所述储液部与所述闭合回路中的介质容腔连通，所述压力维持部用于维持所述储液部内的压力和所述闭合回路中的介质容腔内的压力相同。
优选地，所述储液部与所述换热器连通。
优选地，所述储液部包括：储液壳体，可滑动地设于所述储液壳体内部的滑板；其中，所述滑板与所述壳体密封连接且形成用于存储介质的储液腔；
所述压力维持部包括：与所述储液壳体相连的维持部壳体，设于所述维持部壳体的压力维持弹簧；其中，所述压力维持弹簧的一端固定于所述维持部壳体，所述压力维持弹簧的另一端与所述滑板固定连接。
基于上述提供的投影设备的液冷散热系统，本实用新型还提供了一种投影设备，该投影设备包括液冷散热系统，所述液冷散热系统为上述任意一项所述的投影设备的液冷散热系统。
 有益效果
本实用新型提供的投影设备的液冷散热系统，由于沿任一方向，换热组件有部分介质容腔位于水泵腔体的一侧，且换热组件有部分介质容腔位于水泵腔体的另一侧，则在任一方向上水泵腔体都不会在整个液冷散热系统的顶端，从而避免了气泡在水泵内聚集，进而在360°自由安装的投影设备中避免了气泡在水泵内聚集。
附图说明
为了更清楚地说明本实用新型实施例和现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本实用新型的实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据提供的附图获得其他的附图。
图1为现有技术提供的投影设备的液冷散热系统的结构示意图；
图2为本实用新型实施例提供的投影设备的液冷散热系统的第一种结构示意图；
图3为图2中投影设备的液冷散热系统的主视图；
图4为本实用新型实施例提供的投影设备的液冷散热系统的第二种结构示意图；
图5为本实用新型实施例提供的投影设备的液冷散热系统的第三种结构示意图；
图6为图5中辅助器与换热器的内部连通示意图；
图7为本实用新型实施例提供的投影设备的一种结构示意图；
图8为本实用新型实施例提供的投影设备的另一种结构示意图。
上图1-图8中：
11为水泵、12为冷却板、13为水箱、14为换热器、21为水泵、22为第三冷却分板、23为第二冷却分板、24为第一冷却分板、25为风扇、26为换热器、261为换热器进口、262为换热管、27为管道、271为金属管段、272为接头管段、28为自动补液器、29为延伸部、291为延伸出口、210为光源模组、211为色轮模组、212为光机模组、213为镜头模组。
 本发明的最佳实施方式
下面将结合本实用新型实施例中的附图，对本实用新型实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本实用新型一部分实施例，而不是全部的实施例。基于本实用新型中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本实用新型保护的范围。
本实用新型实施例提供的投影设备的液冷散热系统，包括：管道27、水泵21、冷却板和换热器26，水泵21、冷却板和换热器26通过管道27连接，管道27、水泵21、冷却板和换热器26的介质容腔连通而形成供冷却液流通的闭合回路。
其中，沿任一方向，至少有闭合回路中的一介质容腔的部分部位位于水泵21的介质容腔一侧，且至少有闭合回路中的一介质容腔的部分部分位于水泵21的介质容腔另一侧。
可以理解的是，沿任一方向，水泵21的介质容腔一侧和水泵21的介质容腔另一侧是水泵21的介质容腔在该方向上相对的两侧。
上述投影设备的液冷散热系统中，沿任一方向，至少有闭合回路中的一介质容腔的部分部位位于水泵21的介质容腔一侧，存在多种情况，例如，闭合回路中一个介质容腔的部分部位位于水泵21的介质容腔一侧、闭合回路中一个介质容位于水泵21的介质容腔一侧、闭合回路中至少两个介质容腔的部分部位位于水泵21的介质容腔一侧、闭合回路中至少两个介质容腔位于水泵21的介质容腔一侧、或者闭合回路中至少一个介质容腔的部分部分位于水泵21的介质容腔一侧且闭合回路中至少一个介质容腔位于水泵21的介质容腔一侧。
相应地，至少有闭合回路中的一介质容腔的部分部分位于水泵21的介质容腔另一侧，亦存在上述多种情况。具体地，闭合回路中一个介质容腔的部分部位位于水泵21的介质容腔另一侧、闭合回路中一个介质容位于水泵21的介质容腔另一侧、闭合回路中至少两个介质容腔的部分部位位于水泵21的介质容腔另一侧、闭合回路中至少两个介质容腔位于水泵21的介质容腔另一侧、或者闭合回路中至少一个介质容腔的部分部分位于水泵21的介质容腔另一侧且闭合回路中至少一个介质容腔位于水泵21的介质容腔另一侧。
本实用新型实施例提供的投影设备的液冷散热系统，由于沿任一方向，至少有闭合回路中的一介质容腔的部分部位位于水泵21的介质容腔一侧，且至少有闭合回路中的一介质容腔的部分部分位于水泵21的介质容腔另一侧，则在任一方向上，水泵21的介质容腔都不会在整个液冷散热系统的顶端，从而避免了气泡在水泵21内聚集，进而在360°自由安装的投影设备中避免了气泡在水泵21内聚集。
由于水泵21为立体部件，处于三维空间中，为了便于达到上述目的，优先选择沿Y向，换热器26和冷却板分别位于水泵21的两侧；沿Z向，换热器26和冷板中，至少一者的介质容腔的部分部位位于水泵21的介质容腔一侧，至少一者的介质容腔的部分部位位于水泵21的介质容腔另一侧；沿X向，换热器26和冷却板中，至少一者的介质容腔的部分部位位于水泵21的介质容腔一侧，至少一者的介质容腔的部分部位位于水泵21的介质容腔另一侧，如图2和图4所示。
上述投影设备的液冷散热系统，Y向、X向和Z向两两垂直，即Y向垂直于X向、Y向垂直于Z向、X向垂直于Z向。以图3为例，以风扇25的轴向为Y向，以第三冷却分板22的长度方向为X向，即为图3中的水平方向，以第三冷却分板22的厚度方向为Z向，即为图3中的竖直方向。
具体地，当投影设备沿Y向安装时，水泵21位于换热器26和冷却板之间，如图2和图4所示，即水泵21的介质容腔位于换热器26的介质容腔和冷却板的介质容腔之间，则该水泵21的介质容腔不会位于整个液冷散热系统的最高位置，使得气泡不会再水泵21中聚集。
当投影设备沿Z向安装时，水泵21的介质容腔位于换热器26的介质容腔的部分部位和冷却板的介质容腔的部分部位之间、或者水泵21的介质容腔位于换热器26的介质容腔的部分部位和冷却板的介质容腔的部分部位之间、或者水泵21的介质容腔位于换热器26的介质容腔中部、或者水泵21的介质容腔位于冷却板的介质容腔中部、或者水泵21的介质容腔位于换热器26的介质容腔中部且位于冷却板的介质容腔中部，即该水泵21的介质容腔不会位于整个液冷散热系统的最高位置，使得气泡不会再水泵21中聚集。
当投影设备沿X向安装时，水泵21的介质容腔位于换热器26的介质容腔的部分部位和冷却板的介质容腔的部分部位之间、或者水泵21的介质容腔位于换热器26的介质容腔的部分部位和冷却板的介质容腔的部分部位之间、或者水泵21的介质容腔位于换热器26的介质容腔中部、或者水泵21的介质容腔位于冷却板的介质容腔中部、或者水泵21的介质容腔位于换热器26的介质容腔中部且位于冷却板的介质容腔中部，即该水泵腔体不会位于整个液冷散热系统的最高位置，使得气泡不会再水泵21中聚集。
通过上述设置，即使投影设备沿与Y向（X向或者Z向）的夹角为锐角的其他方向安装，也保证了该水泵21的介质容腔不会位于整个液冷散热系统的最高位置，从而避免了气泡在水泵21中聚集。
当然，上述投影设备的液冷散热装置，也可选择沿Y向时，换热器26的介质容腔的部分部位和冷却板的介质容腔的部分部位分别位于水泵21的介质容腔的两侧，或者换热器26的介质容腔和冷却板的介质容腔的部分部位分别位于水泵腔体的两侧，并不局限于上述实施例。
为了适用于多个发热组件29的散热，上述投影设备的液冷散热系统中，冷却板包括至少两个串联的冷却分板。具体地，冷却分板的数目根据实际需要散热的发热组件29的数目进行设计，本实用新型实施例对此不做限定。
如图2-4所示，上述冷却板包括三个串联的冷却分板，分别为第一冷却分板24、第二冷却分板23和第三冷却分板22。为了方便布局，如图3所示，沿Z向，换热器26的介质容腔的部分部位和第三冷却分板22的介质容腔均位于水泵21的介质容腔一侧，第二冷却分板23的介质容腔的部分部位位于水泵21的介质容腔另一侧；沿X向，换热器26的介质容腔的部分部位位于水泵21的介质容腔一侧，第一冷却分板24的介质容腔位于水泵21的介质容腔另一侧。
上述投影设备的散热系统中，沿X向时，还可选择第一冷却分板24、第二冷却分板23和第三冷却分板22的介质容腔的部分部位均位于水泵21的介质容腔另一侧腔体的顶面，如图3所示。
优选地，上述投影设备的散热系统还包括延伸部29，该延伸部29的介质容腔与闭合回路中的介质容腔连通；其中，沿一方向，水泵21的介质容腔突出于管道27、水泵21、冷却板和换热器26的介质容腔，且延伸部29的介质容腔突出于水泵21的介质容腔。
这样，在现有散热系统中，某一方向上水泵21的介质容腔在整个散热系统的最高位置，即可将延伸部29的介质容腔增加在该方向上，以在该方向上延伸部29的介质容腔突出于水泵21的介质容腔，使得水泵21的介质容腔在该方向上不在整个液冷散热系统的最高位置，便于达到目的，方便了生产和制造。
实际应用过程中，延伸部29的介质容腔可与闭合回路中的一个介质容腔连通，还可与闭合回路中的两个介质容腔连通。为了便于设置，优先选择延伸部29的介质容腔仅具有延伸进口，闭合回路中的任意一个介质容腔通过延伸进口与延伸部29的介质容腔连通。
上述投影设备的液冷散热系统，可选择换热器26的介质容腔通过延伸进口与延伸部29的介质容腔连通，可选择冷却板的介质容腔通过延伸进口与延伸部29的介质容腔连通，可选择管道27的介质容腔通过延伸进口与延伸部29的介质容腔连通，还可选择水泵21的介质容腔通过延伸进口与延伸部29的介质容腔连通。
为了便于冷却液流动，优先选择延伸部29的介质容腔具有延伸进口和延伸出口291，闭合回路中的任意两个介质容腔分别通过延伸进口和延伸出口291与延伸部29的介质容腔连通。
此时，延伸部29可与闭合回路中的一个部件并连，也可串接于闭合回路中。进一步地，优先选择延伸部29串接于闭合回路中。延伸部29可串接在换热器26和管道27之间、两个管道27之间、水泵21和管道27之间、水冷板和管道之间等。
为了方便安装，优先选择延伸进口与换热器26的介质容腔连通，延伸出口291通过管道27的介质容腔与水泵21的介质容腔连通，如图6所示。
换热器26为本领域技术人员所常用部件，该换热器26的具体结构可根据实际需要进行设计。为了简化结构，如图6所示，上述换热器26包括：换热壳体，位于换热壳体内的换热管262。其中，冷却液流经换热管262。对于换热管262的数目和分布，可根据换热需求进行设计，本实用新型实施例对此不做限定。
上述延伸部29的介质容腔可为壳体腔体，也可为管体腔体，本实用新型实施例对此不做限定。为了简化结构，上述延伸部29的介质容腔为壳体腔体，如图6所示。
通常为了方便连接，选择管道27为塑料管或者橡胶管，但是塑料管和橡胶管的水蒸气渗透系数和透气性均较低，导致整个液冷散热系统的蒸散损失较大。为了便于安装，同时减小蒸散损失，优先选择至少一个管道27包括：金属管段271和两个接头管段272，其中，两个接头管段272分别与金属管段271的两端连通，接头管段272为橡胶管或者塑料管，如图2和图4所示。
由于金属管与塑料管和橡胶管相比，水蒸气的渗透系数和透气性均较低，从而有效减小了蒸散损失。
为了提高换热器26的换热效率，上述投影设备的液冷散热系统包括：向换热器26吹风的风扇25，如图2-4和图5所示。对于风扇25的类型和数目，可根据实际需要进行选择，本实用新型实施例对此不做限定。
进一步地，上述投影设备的液冷散热系统还包括自动补液器28，如图4和图5所示，该自动补液器28包括：用于储存冷却液的储液部，与储液部相连的压力维持部；其中，储液部与闭合回路中的介质容腔连通，压力维持部用于维持储液部内的压力和闭合回路中的介质容腔内的压力相同。
当上述液冷散热系统内的液体因蒸散作用减少时，自动补液器28在压力维持部的作用下将储液部的液体注入到液冷循环系统；从而保证整个液冷散热系统的散热性能及使用寿命；同时，当自动补液器28处于较低位置时，由于压力维持部的存在，也能够实现补液，适用于任一安装方向。
上述储液部与闭合回路中的介质容腔连通，具体地，储液部通过管道27与闭合回路中的介质容腔连通，可选择储液部与换热器26的介质容腔连通，也可选择与冷却板的介质容腔连通。为了方便安装，优先选择储液部与换热器26的介质容腔连通。
上述自动补液器28的压力维持部，存在多种结构。为了简化结构，优先选择储液部包括：储液壳体，可滑动地设于储液壳体内部的滑板；其中，滑板与壳体密封连接且形成用于存储介质的储液腔；压力维持部包括：与储液壳体相连的维持部壳体，设于维持部壳体的压力维持弹簧；其中，压力维持弹簧的一端固定于维持部壳体，压力维持弹簧的另一端与滑板固定连接。可以理解的是，压力维持弹簧为压缩弹簧，对于压缩弹簧的压缩量可根据实际需要进行设计，本实用新型实施例对此不做限定。
正常情况下，储液部内的压力与闭合回路中的介质容腔内的压力相同，当闭合回路中介质容腔内的压力较低时，储液部中的压力较高，压力维持弹簧推动隔板移动，储液部内的液体流向换热组件，当压力平衡时，不再补液。
当然，也可选择将压力维持弹簧替换为压力气体，正常情况下，压力气体对隔板的作用力与储液部内的液体对隔板的作用力相同，储液部内的压力与闭合回路中的介质容腔内的压力相同，当闭合回路中的介质容腔内的压力较低时，储液部中的压力较高，压力气体推动隔板移动，储液部内的液体流向换热组件，当压力平衡时，不再补液。
上述投影设备的液冷散热系统，还可选择自动补液器28为其他结构，并不局限于上述实施例。
基于上述实施例提供的投影设备的液冷散热系统，本实用新型实施例还提供了一种投影设备，该投影设备包括液冷散热系统，该液冷散热系统为上述实施例所述的投影设备的液冷散热系统。
由于上述实施例提供的投影设备的液冷散热系统具有上述技术效果，本实用新型实施例提供的投影设备具有上述投影设备的液冷散热系统，则本实用新型实施例提供的投影设备也具有相应的技术效果，本文不再赘述。
为了提高紧凑性，如图7和图8所示，上述投影设备中第三冷却分板22和第二冷却分板22分别位于光源模组210的两侧且与光源模组210贴合，水泵21位于光源模组210远离镜头模组213的一侧，第一冷却分板24位于光机模组212和色轮模组211之间，风扇25和换热器26均位于色轮模组211远离第一冷却分板24的一侧。
上述布置方式，提高了整个投影设备的紧凑性；同时第一冷却分板24同时冷却光机模组212和色轮模组211，减少了冷却部件，简化了结构，便于减小整个投影设备的体积。
上述投影设备中，为了提高换热器26的换热效率，风扇25位于换热器26的两侧，加强对换热器26的换热。具体地，换热器26靠近水泵21的一侧和远离水泵21的一侧均设有风扇25。当然，也可仅在换热器26的一侧设置风扇25，并不局限于上述实施例。
对所公开的实施例的上述说明，使本领域技术人员能够实现或使用本实用新型。对这些实施例的多种修改对本领域技术人员来说将是显而易见的，本文中所定义的一般原理可以在不脱离本实用新型的精神或范围的情况下，在其它实施例中实现。因此，本实用新型将不会被限制于本文所示的这些实施例，而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。

Claims (14)

1、一种投影设备的液冷散热系统，包括：管道（27）、水泵（21）、冷却板和换热器（26），所述水泵（21）、所述冷却板和所述换热器（26）通过所述管道（27）连接，所述管道（27）、所述水泵（21）、所述冷却板和所述换热器（26）的介质容腔连通而形成供冷却液流通的闭合回路；其特征在于，
沿任一方向，至少有所述闭合回路中的一介质容腔的部分部位位于所述水泵（21）的介质容腔一侧，且至少有所述闭合回路中的一介质容腔的部分部分位于所述水泵（21）的介质容腔另一侧。
2、根据权利要求1所述的投影设备的液冷散热系统，其特征在于，
沿Y向，所述换热器（26）和所述冷却板分别位于所述水泵（21）的两侧；
沿Z向，所述换热器（26）和所述冷却板中，至少一者的介质容腔的部分部位位于所述水泵（21）的介质容腔一侧，至少一者的介质容腔的部分部位位于所述水泵（21）的介质容腔另一侧；
沿X向，所述换热器（26）和所述冷却板中，至少一者的介质容腔的部分部位位于所述水泵（21）的介质容腔一侧，至少一者的介质容腔的部分部位位于所述水泵（21）的介质容腔另一侧；
其中，所述Y向、所述X向和所述Z向两两垂直。
3、根据权利要求2所述的投影设备的液冷散热系统，其特征在于，所述冷却板包括至少两个串联的冷却分板。
4、根据权利要求3所述的投影设备的液冷散热系统，其特征在于，所述冷却板包括三个串联的冷却分板，分别为第一冷却分板（24）、第二冷却分板（23）和第三冷却分板（22）；
沿Z向，所述换热器（26）的介质容腔的部分部位和所述第三冷却分板（22）的介质容腔均位于所述水泵（21）的介质容腔一侧，所述第二冷却分板（23）的介质容腔的部分部位位于所述水泵（21）的介质容腔另一侧；
沿X向，所述换热器（26）的介质容腔的部分部位位于所述水泵（21）的介质容腔一侧，所述第一冷却分板（24）的介质容腔位于所述水泵（21）的介质容腔另一侧。
5、根据权利要求1所述的投影设备的液冷散热系统，其特征在于，还包括延伸部（29），所述延伸部（29）的介质容腔与所述闭合回路中的介质容腔连通；
其中，沿一方向，所述水泵（21）的介质容腔突出于所述管道（27）、所述水泵（21）、所述冷却板和所述换热器（26）的介质容腔，且所述延伸部（29）的介质容腔突出于所述水泵（21）的介质容腔。
6、根据权利要求5所述的投影设备的液冷散热系统，其特征在于，所述延伸部（29）的介质容腔仅具有延伸进口，所述闭合回路中的任意一个介质容腔通过所述延伸进口与所述延伸部（29）的介质容腔连通。
7、根据权利要求5所述的投影设备的液冷散热系统，其特征在于，所述延伸部（29）的介质容腔具有延伸进口和延伸出口（291），所述闭合回路中的任意两个介质容腔分别通过所述延伸进口和所述延伸出口（291）与所述延伸部（29）的介质容腔连通。
8、根据权利要求7所述的投影设备的液冷散热系统，其特征在于，所述延伸进口与所述换热器（26）的介质容腔连通，所述延伸出口（291）通过所述管道（27）的介质容腔与所述水泵（21）的介质容腔连通。
9、根据权利要求1所述的投影设备的液冷散热系统，其特征在于，至少一个所述管道（27）包括：金属管段（271）和两个接头管段（272），其中，两个所述接头管段（272）分别与所述金属管段（271）的两端连通，所述接头管段（272）为橡胶管或者塑料管。
10、根据权利要求1所述的投影设备的液冷散热系统，其特征在于，还包括：向所述换热器（26）吹风的风扇（25）。
11、根据权利要求1-10中任意一项所述的投影设备的液冷散热系统，其特征在于，还包括自动补液器（28），所述自动补液器（28）包括：用于储存冷却液的储液部，与所述储液部相连的压力维持部；其中，所述储液部与所述闭合回路中的介质容腔连通，所述压力维持部用于维持所述储液部内的压力和所述闭合回路中的介质容腔内的压力相同。
12、根据权利要求11所述的投影设备的液冷散热系统，其特征在于，所述储液部与所述换热器（26）的介质容腔连通。
13、根据权利要求11所述的投影设备的液冷散热系统，其特征在于，所述储液部包括：储液壳体，可滑动地设于所述储液壳体内部的滑板；其中，所述滑板与所述壳体密封连接且形成用于存储介质的储液腔；
所述压力维持部包括：与所述储液壳体相连的维持部壳体，设于所述维持部壳体的压力维持弹簧；其中，所述压力维持弹簧的一端固定于所述维持部壳体，所述压力维持弹簧的另一端与所述滑板固定连接。
14、一种投影设备，包括液冷散热系统，其特征在于，所述液冷散热系统为权利要求1-13中任意一项所述的投影设备的液冷散热系统。
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