WO2020244377A1 - 一种激光投影设备 - Google Patents

一种激光投影设备 Download PDF

Info

Publication number
WO2020244377A1
WO2020244377A1 PCT/CN2020/090953 CN2020090953W WO2020244377A1 WO 2020244377 A1 WO2020244377 A1 WO 2020244377A1 CN 2020090953 W CN2020090953 W CN 2020090953W WO 2020244377 A1 WO2020244377 A1 WO 2020244377A1
Authority
WO
WIPO (PCT)
Prior art keywords
laser
cold head
cold
housing
heat
Prior art date
Application number
PCT/CN2020/090953
Other languages
English (en)
French (fr)
Inventor
崔雷
邢哲
Original Assignee
青岛海信激光显示股份有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 青岛海信激光显示股份有限公司 filed Critical 青岛海信激光显示股份有限公司
Publication of WO2020244377A1 publication Critical patent/WO2020244377A1/zh

Links

Images

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
    • G03B21/16—Cooling; Preventing overheating

Definitions

  • This application relates to the technical field of projection equipment, and in particular to a laser projection equipment.
  • Laser projection display technology is an optical display technology that uses optical system, circuit system, and lens system to project laser onto the screen to achieve laser image projection; among them, semiconductor laser is a key component of laser projection display technology, which can convert electrical energy into Light energy.
  • the electro-optical conversion efficiency of the existing semiconductor laser is about 40%, and 60% of the electrical energy is converted into heat; especially for laser TVs, in order to obtain higher luminous flux or higher color gamut, usually multiple lasers are combined to form a laser In the light source system of the TV, multiple lasers will generate a lot of heat, causing the temperature of the laser to rise, and related technologies cannot dissipate the heat of the laser in time, causing the luminous efficiency of the laser to gradually decrease.
  • the present application provides a laser projection device, including a laser light source, a cold head and a pump are provided on the back of the laser light source, the cold head is connected with a cold row, and the outlet of the cold row is communicated with the inlet of the cold head, The inlet of the cold row is in communication with the outlet of the cold head, the pump is used to drive the cooling liquid to circulate in the cold head and the cold row, and the cold row is connected with a fluid replacement device.
  • a fan is installed on one side of the cold row, and the laser light source, the cold head, the pump and the liquid supplement are located on the other side of the cold row.
  • FIG. 1 is a schematic structural diagram of a laser projection device according to an embodiment of the application.
  • FIG. 2 is a schematic diagram of the structure of the laser projection device in Embodiment 1;
  • FIG. 3 is a schematic diagram of the structure of the laser projection equipment in Embodiment 1 without a laser light source;
  • FIG. 4 is a schematic diagram of the structure of the cold row in the laser projection equipment of Embodiment 1;
  • FIG. 5 is a schematic diagram of the structure of the first cold head in the laser projection equipment of Embodiment 1;
  • FIG. 6 is a schematic diagram of the structure of the bottom plate of the housing of the first cold head in the laser projection device of Embodiment 1;
  • FIG. 7 is one of the structural schematic diagrams of the laser projection equipment of Embodiment 2.
  • FIG. 8 is a schematic structural diagram of a liquid-cooled heat dissipation system in a laser projection device according to Embodiment 2;
  • Fig. 9 is the second structural diagram of the laser projection equipment of the second embodiment.
  • Fig. 10 is the third structural diagram of the laser projection equipment of the second embodiment.
  • FIG. 11 is a schematic diagram of the structure of the mounting frame in the laser light source of the laser projection equipment in Embodiment 2;
  • FIG. 12 is a schematic diagram of the structure of the heat conduction device in the laser projection equipment of Embodiment 2;
  • FIG. 13 is a schematic diagram of the structure of the second cold head in the laser projection equipment of Embodiment 3;
  • Figure 14 is one of the exploded views of the second cold head in the laser projection device of the third embodiment
  • Figure 15 is the second exploded view of the second cold head in the laser projection device of the third embodiment
  • Figure 16 is one of the cross-sectional views of the second cold head in the laser projection device of the third embodiment
  • 17 is the second cross-sectional view of the second cold head in the laser projection equipment of the third embodiment.
  • 19 is a schematic diagram of the structure of the second air guide of the second cold head in the laser projection equipment of Embodiment 3;
  • FIG. 20 is a schematic diagram of the structure of the top plate of the second cold head in the laser projection equipment of Embodiment 3;
  • 21 is a schematic diagram of the structure of the heat conducting device, cold head, and pump in the laser projection equipment of Embodiment 5.
  • connection should be interpreted broadly unless otherwise clearly specified and limited. For example, it can be a fixed connection or a detachable connection. Connected or integrally connected; it can be mechanically connected; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components.
  • connection should be interpreted broadly unless otherwise clearly specified and limited. For example, it can be a fixed connection or a detachable connection. Connected or integrally connected; it can be mechanically connected; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components.
  • the laser projection device of the embodiment of the present application includes a laser light source 100.
  • the back of the laser light source 100 is provided with a cold head 200 and a pump 500.
  • the cold head 200 is connected to a cold exhaust 300, and the outlet of the cold exhaust 300 and the cold head 200
  • the inlet of the cold row 300 is connected with the outlet of the cold head 200.
  • the pump 500 is used to drive the coolant to circulate in the cold head 200 and the cold row 300.
  • the cold row 300 is connected with a liquid supplement 800 which is used for To replenish the cold row with coolant, a fan 400 is installed on one side of the cold row 300, and the laser light source 100, the cold head 200, the pump 500, and the liquid supplement 800 are located on the other side of the cold row 300.
  • a cold head 200 and a pump 500 are arranged on the back of the laser light source 100.
  • the cold head 200 is connected to the cold exhaust 300, and the inlet of the cold exhaust 300 is connected to the outlet of the cold exhaust 300.
  • the outlet of the is connected with the inlet of the cold head 200
  • the pump 500 drives the cooling liquid to circulate in the cold head 200 and the cold row 300
  • the cold row 300 is connected with a liquid supplement 800
  • the liquid supplement 800 is used to supplement the cold row 300 with coolant
  • the coolant in the cold head 200 absorbs the heat generated by the laser light source 100 and then the temperature rises.
  • the higher temperature coolant flows out of the outlet of the cold head 200 and passes through the cold exhaust 300.
  • the inlet of the cold row 300 enters the cold row 300, and the coolant can exchange heat with the air near the cold row 300 during the process of flowing in the cold row 300 to achieve cooling, and the fan 400 on the cold row 300 can accelerate the air flow near the cold row 300 , So that the cooling liquid can exchange heat with more air, the temperature of the cooling liquid is rapidly reduced, and finally the cooling liquid with a lower temperature is returned to the cold head 200 through the outlet of the cold row 300 and the inlet of the cold head 200.
  • the heat generated by the laser light source 100 in the embodiment of the present application can be quickly dissipated by the liquid cooling system including the cold head 200, the cold exhaust 300 and the pump 500, ensuring that the working temperature of the laser light source 100 is within the design value range, and improving the laser
  • the reliability of the light source is conducive to the stability of the luminous performance of the laser light source; and the fan 400 is installed on one side of the cold row 300, and the laser light source 100, the cold head 200, the pump 500 and the fluid replacement device 800 are located on the other side of the cold row 300. This makes the entire laser device compact and small.
  • the above-mentioned laser light source 100 includes one or more laser groups, the number of cold heads 200 is one or more, and each laser group is corresponding to at least one cold head 200, so as to ensure that heat can be dissipated for each laser group.
  • the above-mentioned laser group includes one or more lasers.
  • the structure and composition of the applied liquid cooling system are different. The application will be further described below in conjunction with several specific embodiments.
  • the laser projection device of this embodiment includes a laser light source 100.
  • the laser light source 100 includes a first laser group and a second laser group.
  • the first laser group includes a first laser and a heat sink for the first laser.
  • the second laser group includes a second laser, and a second cold head 202 is correspondingly provided on the heat sink of the second laser.
  • the first cold head 201 and the second cold head The heads 202 are connected in series, the inlet of the first cold head 201 is connected with the outlet of the cold row 300, the outlet of the second cold head 202 is connected with the inlet of the cold row 300, and a fan 400 is installed on the cold row 300.
  • the first laser and the second laser are both equipped with cold heads.
  • the two cold heads guide the heat absorbed from the two lasers to the cold row 300 through the coolant, and the high-temperature coolant dissipates heat in the cold row 300 After the temperature is lowered, the heat dissipation is accelerated by the fan 400, so that the laser light source 100 in the laser projection device of this embodiment has a better heat dissipation effect, improves the reliability of the laser light source, and facilitates the stability of the light-emitting performance of the laser light source.
  • the cold row 300 includes a plurality of heat dissipation tubes 311 arranged in parallel, and heat dissipation fins are arranged between adjacent heat dissipation tubes 311.
  • the fan 400 is installed on one radial side of the plurality of heat dissipation tubes 311.
  • the laser, the second laser, the first cold head 201, and the second cold head 202 are all located on the other radial side of the plurality of heat dissipation pipes 311, so that the area of the cold exhaust 300 covered by the wind field of the fan 400 is larger, and the heat dissipation effect is better. it is good.
  • the first cold head 201 and the second cold head 202 both adopt the same structure.
  • the first cold head 201 includes a housing 1 that can contain a cooling liquid.
  • the inner wall of the bottom plate 10b of 1 is provided with a plurality of spoiler posts 3, which are arranged at intervals, as shown in Figs. 5-6.
  • the spoiler 3 can hinder the cooling liquid from flowing on the bottom plate 10b, reduce the flow speed of the cooling liquid, and increase the heat dissipation area of the cooling liquid, thereby further improving the heat dissipation effect of the first cold head 201.
  • the ratio of the diameter to the height of the spoiler column 3 is greater than 0.75, the resistance to the coolant is greater, and the length between the spoiler column 3 and the coolant is shorter, so the diameter and height of the spoiler column 3 in this embodiment
  • the ratio of is less than 0.75, for example, the ratio of the diameter to the height of the spoiler 33 is 0.7, 0.65, 0.6.
  • the bottom plate 10b of the housing 1 of the first cold head 201 is also provided with a plurality of mutually parallel strip bonding blocks 4 or flat bonding blocks 5 bonded to the heat sink of the first laser.
  • the laser projection device of this embodiment includes a laser light source 100.
  • the laser light source 100 includes a first laser group and a second laser group.
  • the first laser group includes a first laser and a second laser.
  • the second laser group includes a third laser;
  • the laser projection equipment of this embodiment also includes a first heat conduction device 600 and a first pump 501.
  • the first heat conduction device 600 includes a first heat conduction block 601 and a second heat conduction block 601. Block 602 and the first heat transfer tube 603 sealed with refrigerant inside. The position of the first heat transfer block 601 is higher than that of the second heat transfer block 602.
  • the first heat transfer block 601 and the second heat transfer block 602 are respectively sleeved in the first Outside the two ends of the heat transfer tube 603, as shown in Figures 7 to 8 and Figure 12; the first heat conduction block 601 is arranged corresponding to the heat sink of the first laser (such as bonding), and the second heat conduction block 602 is connected to the heat sink of the second laser.
  • the heat sink is arranged correspondingly, the first heat conducting block 601 is provided with a first cold head 201 on the side away from the first laser, and the second cold head 202 is correspondingly provided on the heat sink of the third laser.
  • the heads 202 are connected in series, the inlet of the first cold head 201 is connected with the outlet of the first cold row 301, the outlet of the second cold head 202 is connected with the inlet of the first cold row 301, and a first fan 401 is installed on the first cold row 301 ,
  • the first pump 501 drives the coolant to circulate in the first cold row 301, the first cold head 201 and the second cold head 202, that is, the first cold head 201, the second cold head 202, the first pump 501, and the second cold head 202
  • a cold row 301 and a first fan 401 constitute a first liquid cooling heat dissipation system.
  • the bottom surface of the shell 1 of the first cold head 201 is attached to the first heat transfer block 601, the heat sink of the second laser can transfer heat to the second heat transfer block 602, and the second heat transfer block 602 transfers heat to the first heat transfer tube 603, the coolant in the first heat transfer tube 603 is heated and evaporated into gas, the gas refrigerant floats to the end of the heat transfer tube located in the first heat conduction block 601, and the heat sink of the first laser transfers the heat to the first heat transfer block 601 and the first heat transfer tube 603, the temperature of the first heat transfer block 601 and the first heat transfer tube 603 is reduced by the coolant in the housing 1 of the first cold head 201, and the gaseous refrigerant in the first heat transfer tube 603 After being condensed, it drops to the end of the first heat transfer tube 603 located in the second heat conducting block 602, and the refrigerant in the first heat transfer tube 603 repeatedly evaporates and condenses to realize the heat conduction to the first laser and the second laser;
  • the heat-conducting blocks in the first heat-conducting device 600 are not limited to two. If the first laser group also includes a third laser, a fourth laser, ..., an Nth laser, a third laser, a fourth laser, ... The N lasers are all set lower than the first laser.
  • the number of heat conduction blocks in the first heat conduction device 600 is the same as the number of lasers in the first laser group.
  • One heat transfer tube can be used to connect all the heat conduction blocks. Of course, one heat transfer block is used.
  • the heat conduction device structure with multiple heat conduction blocks connected in series is suitable for the first laser group with lower energy consumption.
  • the plane of the corresponding first heat conducting block 601 may be the same as the plane of the second laser.
  • the angle between the plane of the heat conducting block 602 is less than 90°; if the plane of the first laser is perpendicular to the plane of the second laser, the plane of the first heat conducting block 601 and the plane of the second heat conducting block 602 are perpendicular to each other, such as
  • the heat transfer tube 6 embedded in the first heat conducting block 601 and the second heat conducting block 602 is approximately L-shaped, and the heat transfer tube 603 in FIG. 8 is L-shaped with rounded corners.
  • the laser light source 100 of this embodiment further includes a third laser group, the third laser group includes a fourth laser and a fifth laser, and the fourth laser is set higher than the fifth laser; the laser projection device of this embodiment further includes a second laser.
  • the heat conduction device 700 has the same structure as the first heat conduction device 600.
  • the second heat conduction device 700 includes a third heat conduction block 701, a fourth heat conduction block 702, and a second heat transfer tube sealed with a refrigerant inside 703, the position of the third heat conduction block 701 is higher than the position of the fourth heat conduction block 702, the third heat conduction block 701 and the fourth heat conduction block 702 are respectively sleeved outside the two ends of the second heat transfer tube 703, and the third heat conduction block 701 It is attached to the heat sink of the fourth laser, the fourth heat conduction block 702 is attached to the heat sink of the fifth laser, and the third cold head 203 is provided on the side of the third heat transfer block away from the fourth laser.
  • the laser projection device of this embodiment The use of three cold heads to dissipate heat to the five lasers respectively not only ensures the heat dissipation effect of the laser light source 100, but also uses a small number of cold heads and lower cost.
  • the laser light source 10 includes a first mounting frame 101, a second mounting frame 102, a third mounting frame 103, a fourth mounting frame 104, and a fifth mounting frame 105.
  • the first laser is mounted on the first mounting frame 101
  • the second laser is mounted on the second mounting frame 102
  • the third laser is mounted on the third mounting frame 103
  • the fourth laser is mounted on the fourth mounting frame 104
  • the fifth laser is mounted on the fifth mounting frame 105.
  • the first cold head 201, the second cold head 202, and the third cold head 203 can be connected in series, the inlet of the first cold head 201 is connected to the outlet of the first cold row 301, and the outlet of the third cold head 203 is connected to The inlet of the first cold row 301 is connected.
  • This solution is suitable for the case where the heat generation of the five lasers in the laser light source 100 is low.
  • the laser projection device of this embodiment further includes a second cold row 302, a second fan 402, and a second pump 502.
  • the first cold head 201 and the second cold head 202 are connected in series, and the inlet of the first cold head 201 is connected to The outlet of the first cold row 301 is in communication, the outlet of the second cold head 202 is in communication with the inlet of the first cold row 301; the inlet of the third cold head 203 is in communication with the outlet of the second cold row 302, and the outlet of the third cold head 203 Connected with the inlet of the second cold row 302, the second fan 402 is installed on the second cold row 302, and the second pump 502 drives the coolant to circulate in the second cold row 302 and the third cold head 203, that is, the third cold row
  • the cold head 203, the second cold row 302, the second pump 502 and the second fan 402 constitute a second liquid cooling heat dissipation system.
  • the first liquid cooling heat dissipation system and the second liquid cooling heat dissipation system have a good heat dissipation effect on the laser projection equipment. It is suitable for situations where the laser light source 100 generates a large amount of heat.
  • the first fan 401 in FIGS. 7-10 includes two fans, which are arranged in sequence along the axial direction of the heat dissipation pipe, and the second fan 402 includes one fan.
  • the laser projection device of this embodiment further includes a liquid supplement 800, which is respectively connected with the first liquid-cooled heat dissipation system and the second liquid-cooled heat dissipation system.
  • first cold head 201 the second cold head 202, and the third cold head 203 in this embodiment are the same as those of the first cold head 201 and the second cold head 202 in the first embodiment.
  • the laser projection device of this embodiment has a structure similar to that of Embodiment 1, except that the structure of the second cold head 202 in this embodiment is different from that of the second cold head 202 in Embodiment 1. 13 to 20, the second cold head 202 in this embodiment includes a housing 1 that can contain cooling liquid and a diversion structure 2 installed in the housing 1.
  • the bottom plate 10b of the housing 1 is used to The two lasers exchange heat.
  • the housing 1 is provided with an inlet 11 of the second cold head 202 and an outlet 12 of the second cold head 202.
  • the inlet 11 of the second cold head 202 is higher than the outlet 12 of the second cold head 202.
  • the flow guiding structure 2 is used to increase the length of the flow path of the cooling liquid from the inlet 11 of the second cold head 202 to the bottom plate 10b of the housing 1.
  • the diversion structure 2 since the diversion structure 2 is installed in the housing 1 of the second cold head 202, the cooling liquid derived from the outlet of the first cold head 201 can enter through the inlet 11 of the second cold head 202 In the housing 1 of the second cold head 202, the diversion structure 2 can increase the length of the flow path of the cooling liquid from the inlet 11 to the bottom plate 10b of the housing 1 in the second cold head 202, so that the cooling liquid will fall into the housing 1 There is a long flow time in front of the bottom plate 10b.
  • the cooling liquid flowing from the first cold head 201 When the temperature of the cooling liquid flowing from the first cold head 201 is high, the cooling liquid flows through the guide structure 2 in the second cold head 202 to dissipate heat, such as cooling liquid The heat is transferred to the housing 1 and dissipated through the housing 1 through contact with the diversion structure 2, thereby reducing the temperature of the cooling liquid, so that the temperature of the cooling liquid falling on the bottom plate 10b of the housing 1 is relatively low, which can be fully compatible with the first
  • the second laser exchanges heat and has a better cooling effect on the second laser.
  • the second cold head 202 in this embodiment is used as a cooling module for the second laser, and has a better heat dissipation effect on the second laser, reducing the problem of poor heat dissipation of the laser that affects the luminous efficiency of the laser light source 100 in the laser projection device.
  • the structure of the second cold head 202 described above is suitable for use in a laser light source 100 including multiple lasers.
  • the structure of the Nth (N ⁇ 2) cold head of the multiple cold heads connected in series in the liquid cooling system The structure of the second cold head 202 is the same, and the heat dissipation effect of the laser light source 100 is better.
  • the above-mentioned guide structure 2 includes a first guide plate 21, which is located between the inlet 11 of the second cold head 202 and the outlet 12 of the second cold head 202, and the upper part of the first guide plate 21 The surface is inclined. There is a gap between the first edge 211 of the first baffle 21 and the first side wall 1a of the housing 1 of the second cold head 202 away from the inlet 11 of the second cold head 202.
  • the first baffle 21 The other edges of the second cold head 202 are in sealed connection with the other side walls of the housing 1 of the second cold head 202, so that the coolant flowing in from the inlet 11 of the second cold head 202 flows through the first baffle 21.
  • the outlet 12 of the second cold head 202 is arranged on the second side wall 1b of the housing 1, and the second side wall 1b is arranged opposite to the first side wall 1a.
  • the deflector structure 2 of the second cold head 202 in this embodiment not only includes the first deflector 21 described above, but also includes a second deflector 22, which is located on the first deflector 21. Between the second cold head 202 and the outlet 12 of the second cold head 202, the upper surface of the second baffle 22 is inclined, and the second edge 221 of the second baffle 22 has a gap with the second side wall 1b of the housing 1.
  • the other edges of the second baffle 22 are in hermetically connected with the other side walls of the housing 1, that is, the cooling liquid flows along the first baffle 21 and drops along the first edge 211 of the first baffle 21 to the second baffle On the upper surface of the plate 22, the cooling liquid can further dissipate heat while flowing on the second baffle 22, further improving the heat dissipation effect of the second laser.
  • the outlet 12 of the second cold head 202 can be arranged on the first side wall 1a or on the second side wall 1b.
  • the outlet 12 of the second cold head 202 is arranged on the second side wall 1b, and the position where the coolant drops to the bottom plate 10b is far from the outlet 12 of the second cold head 202. After the coolant can fully exchange heat with the second laser, Then it flows out from the outlet 12 of the second cold head 202.
  • the flow guiding structure 2 is not limited to the above-mentioned structure, but can also include a plurality of flow guiding components composed of the above-mentioned first baffle 21 and second baffle 22, so as to further improve the cooling of the inlet into the housing 1. The heat dissipation effect of liquid.
  • the inner wall of the housing 1 of the second cold head 202 of this embodiment is provided with a plurality of spoiler posts 3, and the plurality of spoiler posts 3 are arranged at intervals.
  • the two spoiler posts 3 may all be located on the top surface of the housing 1, or the multiple spoiler posts 3 are all located on the bottom surface of the housing 1, or some of the multiple spoiler posts 3 are located on the top surface of the housing 1.
  • the other of the plurality of spoiler columns 3 are located on the bottom surface of the housing 1.
  • the spoiler columns 3 can hinder the flow of the cooling liquid along the first baffle 21 or the bottom plate 10b, reduce the flow speed of the cooling liquid, and increase the cooling The heat dissipation area of the liquid, thereby further improving the heat dissipation effect of the second laser.
  • the cooling liquid has a better turbulence effect, which can increase the heat dissipation effect of the turbulence column 3 on the cooling liquid.
  • the inclination of the first baffle 21 and the second baffle 22 may be the same or different.
  • the first deflector 21 if the inclination angle ⁇ of the upper surface of the first deflector 21 is greater than 20°, the flow velocity of the cooling liquid on the first deflector 21 is too fast, and the cooling liquid flows to the casing.
  • the inclination angle ⁇ of the upper surface of the first deflector 21 in the second cold head 202 of this embodiment is 10°-20°, such as ⁇ being 10°, 14°, 18°, 20°, and the second guiding plate
  • the inclination angle of the upper surface of the baffle 22 is the same as the inclination angle of the upper surface of the first baffle 21.
  • the housing 1, the flow guiding structure 2, and the spoiler 3 of the above-mentioned second cold head 202 can be manufactured in one piece, or can be manufactured in layers. 13-15, the housing 1 of the second cold head 202 includes a top plate 10a, a bottom plate 10b, a first flow guide 10c, and a second flow guide 10d.
  • the first flow guide 10c and the second flow guide 10d are both It is located between the top plate 10a and the bottom plate 10b, and the first air guide 10c is located above the second air guide 10d.
  • the first deflector 10c includes a ring-shaped first fixing frame.
  • the side wall of the first fixing frame is provided with an inlet 11 of the second cold head 202.
  • the first deflector 21 is installed on the first fixing frame, and the second The inlet 11 of the cold head 202 is located above the first deflector 21;
  • the second deflector 10d includes an annular second fixing frame, and an outlet 12 of the second cold head 202 is opened on the side wall of the second fixing frame.
  • the second baffle 22 is installed on the second fixing frame, the outlet 12 of the second cold head 202 is located below the second baffle 22, and the inlet 11 of the second cold head 202 is opposite to the outlet 12 of the second cold head 202.
  • the top plate 10a, the first air guide 10c, the second air guide 10d and the bottom plate 10b are welded in sequence.
  • the bottom plate 10b of the housing 1 is also provided with a plurality of mutually parallel strip-shaped bonding blocks 4 or flat-plate bonding blocks 5 bonded to the heat sink of the second laser.
  • the first cold head 201 in this embodiment can also adopt the same structure as the second cold head 202.
  • the laser light source 100 in the laser projection device only includes one laser, and the laser is cooled by the cold head including the aforementioned flow guiding structure and spoiler.
  • the laser light source 100 in the laser projection device in the second solution also includes only one laser, and the laser is cooled by a cold head that is not equipped with a flow guiding structure and a spoiler;
  • the first solution and the second solution are used through software ANSYS Icepak
  • the schemes are respectively modeled and simulated. Among them, the simulation models of the first scheme and the second scheme adopt the following conditions: the shell of the cold head is made of aluminum alloy, and the cooling liquid in the shell of the cold head is pure water.
  • the flow rate is 10L/min
  • the inlet water temperature is 25°C
  • the initial conditions for setting the simulation are: the thermal power of the laser is set to 100W, the ambient temperature is 25°C, and the number of grids is about 900,000.
  • the laser light source 100 of the laser projection device includes a first laser and a second laser.
  • the first cold head that does not include the flow guide structure and the spoiler is used to cool the first laser, and the first laser is cooled by the flow guide structure and The second cold head of the spoiler cools the second laser, the inlet of the first cold head is connected with the inlet of the first cold row, and the outlet of the second cold head is connected with the inlet of the first cold row; in the fourth solution
  • the laser projection equipment is similar to the laser projection equipment in the third scheme, the difference is that: the first cold head and the second cold head do not include the diversion structure and the spoiler column; the third and fourth schemes are respectively adjusted through the software ANSYS Icepak Perform modeling and simulation calculations.
  • the thermal power of the first laser and the second laser are both 180W, and other conditions are the same as the simulation parameters of the first scheme.
  • the two simulation models are respectively solved and set, and the temperature calculation is performed. As shown in Table 2:
  • Table 2 The temperature comparison table of the two lasers in different ambient temperatures and the two solutions
  • the second cold head in the third solution can significantly reduce the temperature difference between the first laser and the second laser, equalize the working temperature of the laser light source, and the second cold head has a good heat dissipation effect on the second laser.
  • the laser projection device in this embodiment has a structure similar to that of embodiment 2, except that: the first pump 501 includes a casing, and the casing is provided with an impeller cavity.
  • the casing of the first pump 501 is sealed with the casing 1 of the second cold head 202.
  • Connected, and the impeller cavity of the first pump 501 is communicated with the inner cavity of the housing of the second cold head 202, so that the structure of the liquid cooling system is relatively compact.
  • This solution is suitable for laser projection equipment with a smaller volume.
  • the first cold head 201 and the first pump 501 can also be combined in the above manner, and the third cold head 203 and the second pump 502 may be combined in the above manner.
  • the structure of this embodiment is similar to the structure of embodiment 2, the difference is that: the first pump 501 and the second pump 502 have the same structure, taking the first pump 501 as an example, referring to FIG. 21, the first pump 501 includes a housing and In the impeller cavity in the casing, the first cold head 201 is a heat transfer fin, and the heat transfer fin is part of the wall of the impeller cavity, and the outer wall of the heat transfer fin is attached to the first heat conduction block 601, and the coolant enters the impeller cavity and passes through The heat fin exchanges heat with the first heat transfer block 601, thereby reducing the temperature of the gaseous refrigerant in the higher end of the first heat transfer block 601 and the first heat transfer tube 603.
  • the bonding surface of the heat transfer sheet and the first heat transfer block 601 is provided with a heat conduction layer in this embodiment, or the bonding surface of the first heat transfer block 601 and the heat transfer sheet is provided with a heat conduction layer, and the heat transfer layer is used for The contact thermal resistance between the first pump 501 and the first heat conducting block 601 is reduced, thereby improving the heat exchange efficiency of the first heat conducting block 601.
  • the above thermal conductive layer is thermal conductive silicone grease, the thermal conductivity of the thermal conductive silicone grease is greater than 5 (w/m ⁇ k), and the thermal conductivity is good.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Projection Apparatus (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)

Abstract

一种激光投影设备，涉及投影设备技术领域，用于解决激光投影设备中激光器散热效果较差影响光源***的发光效率的问题。激光投影设备包括激光器光源（100），激光器光源（100）的背面设有冷头（200）和泵（500），冷头（200）连接有冷排（300），冷排（300）的出口与冷头（200）的进口连通，冷排（300）的进口与冷头（200）的出口连通，泵（500）用于驱动冷却液在冷头（200）和冷排（300）内循环流动，冷排（300）连接有补液器（800），补液器（800）用于给冷排（300）补充冷却液，冷排（300）的一侧安装有风扇（400），激光器光源（100）、冷头（200）、泵（500）以及补液器（800）位于冷排（300）的另一侧。激光投影设备用于以激光为光源显示图像。

Description

一种激光投影设备
本申请要求于2019年6月3日提交中国专利局、申请号为201910478114.X，申请名称为“一种激光投影设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及投影设备技术领域，尤其涉及一种激光投影设备。
背景技术
激光投影显示技术是一种由光路***、电路***、镜头***将激光投影到屏幕上，实现激光画面投影的光学显示技术；其中，半导体激光器是激光投影显示技术的关键部件，能将电能转换为光能。现有半导体激光器的电光转化效率为40％左右，而60％的电能均转化为热能；尤其是激光电视，为了获得更高的光通量或更高的色域，通常会采用多个激光器组合形成激光电视的光源***，多个激光器会产生大量的热量，导致激光器的温度升高，相关技术不能及时将激光器的热量散出，使得激光器的发光效率逐渐降低。
申请内容
本申请提供一种激光投影设备，包括激光器光源，所述激光器光源的背面设有冷头和泵，所述冷头连接有冷排，所述冷排的出口与所述冷头的进口连通，所述冷排的进口与所述冷头的出口连通，所述泵用于驱动冷却液在所述冷头和所述冷排内循环流动，所述冷排连接有补液器，所述补液器用于给所述冷排补 充冷却液，所述冷排的一侧安装有风扇，所述激光器光源、所述冷头、所述泵以及所述补液器位于所述冷排的另一侧。
附图说明
为了更清楚地说明本申请实施例或相关技术中的技术方案，下面将对实施例或相关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申请的一些实施例，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，还可以根据这些附图获得其他的附图。
图1为本申请实施例激光投影设备的结构示意图；
图2为实施例1激光投影设备的结构示意图；
图3为实施例1激光投影设备中未包括激光器光源的结构示意图；
图4为实施例1激光投影设备中冷排的结构示意图；
图5为实施例1激光投影设备中第一冷头的结构示意图；
图6为实施例1激光投影设备中第一冷头的壳体底板的结构示意图；
图7为实施例2激光投影设备的结构示意图之一；
图8为实施例2激光投影设备中液冷散热***的结构示意图；
图9为实施例2激光投影设备的结构示意图之二；
图10为实施例2激光投影设备的结构示意图之三；
图11为实施例2激光投影设备中激光器光源中安装架的结构示意图；
图12为实施例2激光投影设备中导热装置的结构示意图；
图13为实施例3激光投影设备中第二冷头的结构示意图；
图14为实施例3激光投影设备中第二冷头的***图之一；
图15为实施例3激光投影设备中第二冷头的***图之二；
图16为实施例3激光投影设备中第二冷头的截面图之一；
图17为实施例3激光投影设备中第二冷头的截面图之二；
图18为实施例3激光投影设备中第二冷头的第一导流件的结构示意图；
图19为实施例3激光投影设备中第二冷头的第二导流件的结构示意图；
图20为实施例3激光投影设备中第二冷头的顶板的结构示意图；
图21为实施例5激光投影设备中导热装置、冷头以及泵的结构示意图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请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申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，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，都属于本申请保护的范围。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本申请中的具体含义。
在本申请的描述中，“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
参照图1，本申请实施例的激光投影设备包括激光器光源100，该激光器光源100的背面设有冷头200和泵500，冷头200连接有冷排300，冷排300的出口与冷头200的进口连通，冷排300的进口与冷头200的出口连通，泵500用于驱动冷却液在冷头200和冷排300内循环流动，冷排300连接有补液器800，补液器800用于给冷排补充冷却液，冷排300的一侧安装有风扇400，激光器光源100、冷头200、泵500以及补液器800位于冷排300的另一侧。
本申请实施例提供的激光投影设备，在激光器光源100的背面设置冷头200和泵500，冷头200连接有冷排300，且冷排300的进口与冷头200的出口连通，冷排300的出口与冷头200的进口连通，泵500驱动冷却液在冷头200和冷排300内循环流动，冷排300连接有补液器800，补液器800用于给冷排300补充冷却液；在激光投影设备运行时，冷头200内的冷却液吸收激光器光源100产生的热量后温度升高，在泵500的作用下温度较高的冷却液从冷头200的出口流出，并经冷排300的进口进入冷排300内，冷却液在冷排300内流动的过程中可与冷排300附近的空气换热，实现降温，并且冷排300上的风扇400可加速冷排300附近的空气流动，使得冷却液能够与较多的空气进行换热，冷却液的温度迅速降低，最后温度较低的冷却液经冷排300的出口、冷头200的进口回到冷头200内。因此，本申请实施例中激光器光源100产生的热量能够被包括冷头200、冷排300和泵500的液冷散热***快速散出，保证激光器光源100的工作温度在设计值范围内，提高激光器光源的可靠性，利于激光器光源的发光性能的稳定性；并且风扇400安装在冷排300的一侧，激光器光源100、冷头200、泵500以及补液器800位于冷排300的另一侧，使得整个激光器设备的结构紧凑、体积较小。
上述激光器光源100包括一个或多个激光器组，冷头200的数量为一个或多个，每个激光器组与至少一个冷头200对应设置，从而保证对每个激光器组都能进行散热。其中，上述激光器组包括一个或多个激光器。
根据激光器光源100中激光器的数量、功率、位置以及附近空间的容量不同，所应用的液冷散热***结构和组成不同，下面结合几个具体的实施例对本申请进行进一步说明。
实施例1
参照图2～3，本实施例的激光投影设备包括激光器光源100，该激光器光源100包括第一激光器组和第二激光器组，其中，第一激光器组包括第一激光器，第一激光器的热沉上对应设置(如相互贴合)有第一冷头201；第二激光器组包括第二激光器，第二激光器的热沉上对应设置有第二冷头202，第一冷头201与第二冷头202串联，第一冷头201的进口与冷排300的出口连通，第二冷头202的出口与冷排300的进口连通，冷排300上安装有风扇400。
本实施例中的第一激光器和第二激光器上均设有冷头，两个冷头将从两个激光器吸收的热量通过冷却液导至冷排300，高温的冷却液在冷排300内散热降温后，并通过风扇400加速散热，使得本实施例激光投影设备中激光器光源100的散热效果较好，提高激光器光源的可靠性，利于激光器光源的发光性能的稳定性。
进一步地，参照图4，冷排300包括多个平行设置的散热管311，相邻散热管311之间设有散热鳍片，风扇400安装在多个散热管311的径向一侧，第一激光器、第二激光器、第一冷头201以及第二冷头202均位于多个散热管311的径向另一侧，使得风扇400的作用风场覆盖冷排300的面积较大，散热效果 较好。
本实施例中的第一冷头201和第二冷头202均采用相同的结构，以第一冷头201为例，第一冷头201包括内部可容置冷却液的壳体1，壳体1的底板10b内壁设有多个扰流柱3，多个扰流柱3间隔设置，如图5～6所示。扰流柱3可阻碍冷却液在底板10b上流动，降低了冷却液的流动速度，并增大冷却液的散热面积，从而进一步提高了第一冷头201的散热效果。
若上述扰流柱3的直径与高度的比值大于0.75，对冷却液的阻力较大，扰流柱3伸入与冷却液的长度较短，故本实施例中扰流柱3的直径与高度的比值小于0.75，如扰流柱33的直径与高度的比值为0.7、0.65、0.6。此外，第一冷头201的壳体1底板10b上还设有与第一激光器的热沉贴合的多个相互平行的条形贴合块4或平面贴合块5。
实施例2
参照图7～12，本实施例的激光投影设备包括激光器光源100，该激光器光源100包括第一激光器组和第二激光器组，第一激光器组包括第一激光器和第二激光器，第一激光器高于第二激光器设置，第二激光器组包括第三激光器；本实施例的激光投影设备还包括第一导热装置600和第一泵501，第一导热装置600包括第一导热块601、第二导热块602以及内部密封有制冷剂的第一传热管603，第一导热块601的位置高于第二导热块602的位置，第一导热块601和第二导热块602分别套设在第一传热管603的两端外，如图7～8和图12所示；第一导热块601与第一激光器的热沉对应设置(如贴合)，第二导热块602与第二激光器的热沉对应设置，第一导热块601远离第一激光器的一侧设有第一冷头201，第三激光器的热沉上对应设置有第二冷头202，第一冷头201与 第二冷头202串联，第一冷头201的进口与第一冷排301的出口连通，第二冷头202的出口与第一冷排301的进口连通，第一冷排301上安装有第一风扇401，第一泵501驱动冷却液在第一冷排301、第一冷头201以及第二冷头202内循环流动，即由第一冷头201、第二冷头202、第一泵501、第一冷排301以及第一风扇401构成第一液冷散热***。
第一冷头201的壳体1底面与第一导热块601贴合，第二激光器的热沉可将热量传递至第二导热块602，第二导热块602将热量传递至第一传热管603，第一传热管603中的冷却液被加热蒸发为气体，气体制冷剂上浮至传热管位于第一导热块601内的一端，第一激光器的热沉将热量传递至第一导热块601和第一传热管603，通过第一冷头201的壳体1内的冷却液降低第一导热块601和第一传热管603的温度，第一传热管603内的气态制冷剂被冷凝后，下落到第一传热管603位于第二导热块602内的一端，第一传热管603内的制冷剂反复进行蒸发冷凝，实现对第一激光器和第二激光器的导热；第二冷头202的壳体1底面与第三激光器的热沉贴合，通过第二冷头202内的低温冷却液对第三激光器进行制冷。本实施例激光投影设备中的液冷散热***通过第一导热装置将第一激光器组中的两个激光器导至一处，减少了冷头的数量，降低了成本。
当然，第一导热装置600中的导热块不仅限于两个，若第一激光器组还包括第三激光器、第四激光器，……、第N激光器，第三激光器、第四激光器，……、第N激光器均低于第一激光器设置，第一导热装置600中导热块的数量与第一激光器组中激光器的数量相同，可采用一个传热管连接所有导热块，当然，这种采用一个传热管串联多个导热块的导热装置结构适用于能耗较低的第一激光器组。
可选地，根据第一激光器和第二激光器的位置关系，若第一激光器的所在平面和第二激光器的所在平面夹角为锐角，则相应的第一导热块601的所在平面可与第二导热块602的所在平面的夹角小于90°；若第一激光器的所在平面和第二激光器的所在平面垂直，第一导热块601的所在平面与第二导热块602的所在平面相互垂直，如嵌入第一导热块601和第二导热块602的传热管6大致为L形，图8中传热管603为带有圆角的L形。
对于激光器光源100中有多个高度不同的激光器，且激光器的能耗较高的情况，采用一个导热装置其散热效果较差。例如，本实施例的激光器光源100还包括第三激光器组，第三激光器组包括第四激光器和第五激光器，第四激光器高于第五激光器设置；本实施例的激光投影设备还包括第二导热装置700，第二导热装置700的结构与第一导热装置600的结构相同，第二导热装置700包括第三导热块701、第四导热块702以及内部密封有制冷剂的第二传热管703，第三导热块701的位置高于第四导热块702的位置，第三导热块701和第四导热块702分别套设在第二传热管703的两端外，第三导热块701与第四激光器的热沉贴合，第四导热块702与第五激光器的热沉贴合，第三导热块远离第四激光器的一侧设有第三冷头203，本实施例激光投影设备采用3个冷头分别对5个激光器散热，不仅保证了对激光器光源100的散热效果，而且所采用冷头的数量较少，且成本较低。
参照图11，激光器光源10包括第一安装架101、第二安装架102、第三安装架103、第四安装架104以及第五安装架105，第一激光器安装在第一安装架101上，第二激光器安装在第二安装架102，第三激光器安装在第三安装架103，第四激光器安装在第四安装架104，第五激光器安装在第五安装架105。
可选地，第一冷头201、第二冷头202以及第三冷头203可依次串联，第一冷头201的进口与第一冷排301的出口连通，第三冷头203的出口与第一冷排301的进口连通，这种方案适合于激光器光源100中5个激光器的发热量均较低的情况。
可选地，本实施例的激光投影设备还包括第二冷排302、第二风扇402和第二泵502，第一冷头201与第二冷头202串联，第一冷头201的进口与第一冷排301的出口连通，第二冷头202的出口与第一冷排301的进口连通；第三冷头203的进口与第二冷排302的出口连通，第三冷头203的出口与第二冷排302的进口连通，第二风扇402安装在第二冷排302上，第二泵502驱动冷却液在第二冷排302、第三冷头203内循环流动，即由第三冷头203、第二冷排302、第二泵502以及第二风扇402构成第二液冷散热***，采用第一液冷散热***和第二液冷散热***对激光器投影设备的散热效果好，适用于激光器光源100的发热量较大的情况。图7～10中的第一风扇401包括两个风扇，两个风扇沿散热管的轴向依次设置，第二风扇402包括一个风扇。
为了及时补充液冷散热***的冷却液，本实施例的激光投影设备还包括补液器800，补液器800分别与第一液冷散热***、第二液冷散热***连通。
需要说明的是：本实施例中的第一冷头201、第二冷头202以及第三冷头203的结构与实施例1中第一冷头201和第二冷头202的结构相同。
实施例3
本实施例的激光投影设备与实施例1的结构类似，区别在于：本实施例中第二冷头202的结构与实施例1中第二冷头202的结构不同。参照图13～20，本实施例中的第二冷头202包括内部可容置冷却液的壳体1以及安装在壳体1 内的导流结构2，壳体1的底板10b用于与第二激光器换热，壳体1上开设有第二冷头202的进口11和第二冷头202的出口12，第二冷头202的进口11高于出口第二冷头202的出口12设置，导流结构2用于增加冷却液从第二冷头202的进口11到壳体1的底板10b的流路长度。
本实施例提供的激光投影设备，由于第二冷头202的壳体1内安装有导流结构2，从第一冷头201的出口导出的冷却液可通过第二冷头202的进口11进入第二冷头202的壳体1内，导流结构2可增加冷却液在第二冷头202内从进口11到壳体1底板10b的流路长度，使得冷却液在落入壳体1的底板10b前具有较长的流动时间，当从第一冷头201流出的冷却液温度较高时，冷却液经第二冷头202内的导流结构2流动能够将热量散出，如冷却液通过与导流结构2接触将热量传递至壳体1上并通过壳体1散出，从而降低冷却液的温度，使得下落至壳体1底板10b上的冷却液温度较低，能够充分与第二激光器换热，对第二激光器的降温效果较好。本实施例中的第二冷头202作为第二激光器的冷却模块，对第二激光器的散热效果较好，减少了因激光器散热效果较差而影响激光投影设备中激光器光源100发光效率的问题。
需要说明的是，上述第二冷头202的结构适合应用在包括多个激光器的激光器光源100中，该液冷散热***中多个串联的冷头中第N(N≥2)冷头的结构与上述第二冷头202的结构相同，对激光器光源100的散热效果较好。
上述导流结构2包括第一导流板21，该第一导流板21位于第二冷头202的进口11和第二冷头202的出口12之间，且第一导流板21的上表面为斜面，第一导流板21的第一边沿211与第二冷头202的壳体1上远离第二冷头202的进口11的第一侧壁1a具有间隙，第一导流板21的其他边沿与第二冷头202 的壳体1的其他侧壁密封连接，从而从第二冷头202的进口11流入的冷却液经第一导流板21流动，在流动过程中冷却液的温度逐渐降低，最后从第一边沿211下落至壳体1的底板10b上，导流结构2的结构简单。需要说明的是，第二冷头202的出口12设置在壳体1的第二侧壁1b上，第二侧壁1b与第一侧壁1a相对设置。
进一步地，本实施例中第二冷头202的导流结构2不仅包括上述第一导流板21，还包括第二导流板22，该第二导流板22位于第一导流板21与第二冷头202的出口12之间，第二导流板22的上表面为斜面，且第二导流板22的第二边沿221与壳体1的第二侧壁1b具有间隙，第二导流板22的其他边沿与壳体1的其他侧壁密封连接，即冷却液沿第一导流板21流动，并沿第一导流板21的第一边沿211下落至第二导流板22的上表面上，冷却液可进一步在第二导流板22上流动的过程中进行散热，进一步提高对第二激光器的散热效果。可选地，第二冷头202的出口12可设置在第一侧壁1a上，也可设置在第二侧壁1b上。对于第二冷头202的出口12设置在第二侧壁1b上，冷却液下落至底板10b的位置距离第二冷头202的出口12较远，冷却液可充分与第二激光器换热后，再从第二冷头202的出口12流出。
需要注意的是，导流结构2不仅限于上述结构，还可包括多个由上述第一导流板21和第二导流板22组成的导流组件，从而进一步提高对进入壳体1内冷却液的散热效果。
为了进一步提高冷却液在下落至壳体1底板10b的散热效果，本实施例第二冷头202的壳体1的内壁设有多个扰流柱3，多个扰流柱3间隔设置，多个扰流柱3可均位于壳体1的顶面上、或者多个扰流柱3均位于壳体1的底面上， 或者多个扰流柱3中的一些位于壳体1的顶面上，多个扰流柱3中的另一些位于壳体1的底面上，扰流柱3可阻碍冷却液沿第一导流板21或底板10b流动，降低冷却液的流动速度，并增大冷却液的散热面积，从而进一步提高对第二激光器的散热效果。
因上述第一导流板21的表面为斜面，位于壳体1的顶面上的多个扰流柱3的下端与第一导流板21的上表面间距均相等，使得扰流柱3对冷却液的扰流效果较好，能够增加扰流柱3对冷却液的散热效果。
可选地，第一导流板21和第二导流板22的倾斜度可相同，也可不同。以第一导流板21为例，若第一导流板21的上表面的倾斜角α大于20°，冷却液在第一导流板21上的流速过快，在冷却液流至壳体1底板10b前的流动时间过短，散热效果不佳；若第一导流板21的上表面的倾斜角α小于10°，冷却液在第一导流板21上的流速过慢，不能及时补充壳体1底板10b上冷却液的量，导致壳体1的底板10b与第二激光器换热效果不佳。因此，本实施例第二冷头202中第一导流板21的上表面的倾斜角α为10°～20°，如α为10°、14°、18°、20°，且第二导流板22的上表面的倾斜角与第一导流板21的上表面的倾斜角相同。
需要说明的是，上述第二冷头202的壳体1、导流结构2、扰流柱3可一体成型制作，也可分层制作。参照图13～15，第二冷头202的壳体1包括顶板10a、底板10b、第一导流件10c以及第二导流件10d，第一导流件10c和第二导流件10d均位于顶板10a和底板10b之间，且第一导流件10c位于第二导流件10d的上方。其中，顶板10a的下表面设有多个扰流柱3，且多个扰流柱3均匀分布；底板10b的上表面设有多个扰流柱3，且多个扰流柱3均匀分布；第 一导流件10c包括环形的第一固定架，第一固定架的侧壁上开设有第二冷头202的进口11，上述第一导流板21安装在第一固定架上，第二冷头202的进口11位于第一导流板21的上方；第二导流件10d包括环形的第二固定架，第二固定架的侧壁上开设有第二冷头202的出口12，上述第二导流板22安装在第二固定架上，第二冷头202的出口12位于第二导流板22的下方，第二冷头202的进口11和第二冷头202的出口12相对设置；顶板10a、第一导流件10c、第二导流件10d以及底板10b依次焊接。此外，壳体1的底板10b上还设有与第二激光器的热沉贴合的多个相互平行的条形贴合块4或平板贴合块5。当然，本实施例中的第一冷头201也可采用与第二冷头202相同的结构。
为了说明本实施例的技术效果，设置两组对比方案：第一方案中激光投影设备中的激光器光源100仅包括一个激光器，采用包括上述具有导流结构和扰流柱的冷头对激光器进行制冷；第二方案中激光投影设备中的激光器光源100也仅包括一个激光器，采用包括未设有导流结构和扰流柱的冷头对激光器进行制冷；通过软件ANSYS Icepak对第一方案和第二方案分别进行建模及仿真计算，其中，第一方案和第二方案的仿真模型均采用以下条件：冷头的壳体采用铝合金材料，冷头的壳体内的冷却液采用纯水，冷却液的流量为10L/min，进水温度25℃，设置仿真的初始条件为：激光器的热功率设定为100W，环境温度25℃，划分网格数量在90万左右，对两个仿真模型分别进行求解设置，并进行温度计算，结果如表1：
表1 风扇的转速与两个方案中激光器的温度对比表
Figure PCTCN2020090953-appb-000001
Figure PCTCN2020090953-appb-000002
根据表1的仿真计算结果可知：(1)随着风扇风速的增加，激光器在冷头的作用下，激光器温度均逐渐降低。(2)在相同风量条件下，第一方案的冷头对激光器的散热效果比第二方案的冷头对激光器的散热效果好。
为了说明液冷散热***中第一冷头和第二冷头串联的方案中，具有导流结构和扰流柱的第二冷头对第二激光器的散热效果较好，进一步设置两个对比方案：第三方案中激光投影设备的激光器光源100包括第一激光器和第二激光器，采用未包括导流结构和扰流柱的第一冷头对第一激光器进行制冷，采用包括上述导流结构和扰流柱的第二冷头对第二激光器进行制冷，第一冷头的进口与第一冷排的进口连通，第二冷头的出口与第一冷排的进口连通；第四方案中的激光投影设备与第三方案中的激光投影设备类似，区别在于：第一冷头和第二冷头均未包括导流结构和扰流柱；通过软件ANSYS Icepak对第三方案和第四方案分别进行建模及仿真计算，其中，第一激光器和第二激光器的热功率均为180W，其他条件与第一方案的仿真参数相同，对两个仿真模型分别进行求解设置，并进行温度计算，结果如表2：
表2 不同环境温度与两个方案中两个激光器的温度对比表
Figure PCTCN2020090953-appb-000003
Figure PCTCN2020090953-appb-000004
根据表2可知，第三方案中的第二冷头可明显减小第一激光器和第二激光器的温差，均衡激光器光源的工作温度，第二冷头对第二激光器的散热效果好。
实施例4
本实施例中的激光器投影设备与实施例2的结构类似，区别在于：第一泵501包括外壳，外壳内设有叶轮腔，第一泵501的外壳与第二冷头202的壳体1密封连接，且第一泵501的叶轮腔与第二冷头202的壳体内腔连通，使得液冷散热***的结构较紧凑，该方案适用于体积较小的激光器投影设备。当然，也可将第一冷头201与第一泵501采用上述方式结合为一体，将第三冷头203与第二泵502采用上述方式结合为一体。
实施例5
本实施例的结构与实施例2结构类似，其区别在于：第一泵501和第二泵502的结构相同，以第一泵501为例，参照图21，第一泵501包括外壳、以及设置在外壳内的叶轮腔，第一冷头201为传热片，传热片为叶轮腔的部分壁面，且传热片的外壁与第一导热块601贴合，冷却液进入叶轮腔并通过传热片与第一导热块601换热，从而降低了第一导热块601和第一传热管603较高位置的一端内气态制冷剂的温度。
进一步地，本实施例的传热片上与第一导热块601的贴合面设有导热层， 或第一导热块601上与传热片的贴合面设有导热层，该导热层用于降低第一泵501与第一导热块601之间的接触热阻，从而提高对第一导热块601的换热效率。上述导热层为导热硅脂，导热硅脂的导热系数大于5(w/m·k)，导热能力较好。
在本说明书的描述中，具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到的变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (10)

  1. 一种激光投影设备，其特征在于，包括激光器光源，所述激光器光源的背面设有冷头和泵，所述冷头连接有冷排，所述冷排的出口与所述冷头的进口连通，所述冷排的进口与所述冷头的出口连通，所述泵用于驱动冷却液在所述冷头和所述冷排内循环流动，所述冷排连接有补液器，所述补液器用于给所述冷排补充冷却液，所述冷排的一侧安装有风扇，所述激光器光源、所述冷头、所述泵以及所述补液器位于所述冷排的另一侧。
  2. 根据权利要求1所述的激光投影设备，其特征在于，所述冷头包括内部可容置冷却液的壳体以及安装在所述壳体内的导流结构，所述壳体的底板用于与所述激光器组中的激光器换热，且所述壳体上开设有所述冷头的进口和所述冷头的出口，所述冷头的进口高于所述冷头的出口，所述导流结构用于增加冷却液从所述冷头的进口到所述壳体的底板的流路长度。
  3. 根据权利要求2所述的激光投影设备，其特征在于，所述导流结构包括位于所述冷头的进口和所述冷头的出口之间的第一导流板，所述第一导流板的上表面为斜面，且所述第一导流板的第一边沿与所述壳体上远离所述冷头的进口的第一侧壁具有间隙，所述第一导流板的其他边沿与所述壳体的其他侧壁密封连接。
  4. 根据权利要求3所述的激光投影设备，其特征在于，所述导流结构包括位于所述第一导流板与所述冷头的出口之间的第二导流板，所述第二导流板的上表面为斜面，且所述第二导流板的第二边沿与所述壳体的第二侧壁具有间隙，所述第二导流板的其他边沿与所述壳体的其他侧壁密封连接，所述第二侧壁与所述第一侧壁相对设置。
  5. 根据权利要求2所述的激光投影设备，其特征在于，所述壳体的内壁设有多个扰流柱，多个所述扰流柱间隔设置、且多个所述扰流柱位于所述壳体的顶面和/或底面上。
  6. 根据权利要求5所述的激光投影设备，其特征在于，所述扰流柱的直径与高度的比值小于0.75。
  7. 根据权利要求3所述的激光投影设备，其特征在于，所述第一导流板的上表面的倾斜角为10°～20°。
  8. 根据权利要求2～7中任一项所述的激光投影设备，其特征在于，所述泵包括外壳、以及设置在所述外壳内的叶轮腔，所述泵的外壳与所述冷头的壳体连接，所述泵的叶轮腔与所述冷头的壳体内腔连通。
  9. 根据权利要求1～7中任一项所述的激光投影设备，其特征在于，还包括第一导热块、第二导热块、以及内部密封有制冷剂的传热管，所述第一导热块和所述第二导热块分别套设在所述传热管的两端外，所述激光器光源包括第一激光器和第二激光器，所述第二激光器低于所述第一激光器设置，所述第一导热块与所述第一激光器的热沉相对设置，所述第二导热块与所述第二激光器的热沉相对设置，所述冷头位于所述第一导热块远离所述第一激光器的一侧。
  10. 根据权利要求9所述的激光投影设备，其特征在于，所述第二激光器与所述第一激光器相互垂直。
PCT/CN2020/090953 2019-06-03 2020-05-19 一种激光投影设备 WO2020244377A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910478114.XA CN112034667B (zh) 2019-06-03 2019-06-03 一种激光投影设备
CN201910478114.X 2019-06-03

Publications (1)

Publication Number Publication Date
WO2020244377A1 true WO2020244377A1 (zh) 2020-12-10

Family

ID=73575775

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/090953 WO2020244377A1 (zh) 2019-06-03 2020-05-19 一种激光投影设备

Country Status (2)

Country Link
CN (1) CN112034667B (zh)
WO (1) WO2020244377A1 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113543612A (zh) * 2021-09-15 2021-10-22 南昌龙旗信息技术有限公司 一种手机散热装置
CN113659411A (zh) * 2021-08-17 2021-11-16 武汉裕鹏激光科技有限公司 一种基于水冷机构的高稳定性脉冲激光器

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112987465B (zh) * 2021-03-09 2022-10-04 深圳市火乐科技发展有限公司 散热装置及投影设备

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008304833A (ja) * 2007-06-11 2008-12-18 Hitachi Ltd 液晶プロジェクタ（電子機器用冷却モジュール）
CN205229652U (zh) * 2015-11-24 2016-05-11 讯凯国际股份有限公司 液冷头装置、投影机以及具有发热源的装置
CN107272309A (zh) * 2017-08-21 2017-10-20 青岛海信电器股份有限公司 激光投影设备
CN107272308A (zh) * 2017-08-21 2017-10-20 青岛海信电器股份有限公司 激光投影设备
CN107479307A (zh) * 2017-08-21 2017-12-15 青岛海信电器股份有限公司 投影设备
CN107787164A (zh) * 2017-09-26 2018-03-09 青岛海信电器股份有限公司 一种液冷块、液冷散热***以及激光投影机
WO2019020198A1 (en) * 2017-07-28 2019-01-31 Barco N.V. DEVICES FOR SPATIAL LIGHT MODULATION WITH COOLING

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4244908B2 (ja) * 2003-12-26 2009-03-25 セイコーエプソン株式会社 光変調素子保持体、光学装置、およびプロジェクタ
JP4192882B2 (ja) * 2003-12-26 2008-12-10 セイコーエプソン株式会社 光学装置、およびプロジェクタ
JP4140610B2 (ja) * 2005-03-01 2008-08-27 セイコーエプソン株式会社 光学装置、及びプロジェクタ
JP6550829B2 (ja) * 2015-03-24 2019-07-31 セイコーエプソン株式会社 プロジェクター
JP6828438B2 (ja) * 2017-01-06 2021-02-10 セイコーエプソン株式会社 熱輸送装置及びプロジェクター
CN109426049B (zh) * 2017-08-21 2021-03-05 深圳光峰科技股份有限公司 液冷循环散热装置、液冷循环散热***及光学投影***

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008304833A (ja) * 2007-06-11 2008-12-18 Hitachi Ltd 液晶プロジェクタ（電子機器用冷却モジュール）
CN205229652U (zh) * 2015-11-24 2016-05-11 讯凯国际股份有限公司 液冷头装置、投影机以及具有发热源的装置
WO2019020198A1 (en) * 2017-07-28 2019-01-31 Barco N.V. DEVICES FOR SPATIAL LIGHT MODULATION WITH COOLING
CN107272309A (zh) * 2017-08-21 2017-10-20 青岛海信电器股份有限公司 激光投影设备
CN107272308A (zh) * 2017-08-21 2017-10-20 青岛海信电器股份有限公司 激光投影设备
CN107479307A (zh) * 2017-08-21 2017-12-15 青岛海信电器股份有限公司 投影设备
CN107787164A (zh) * 2017-09-26 2018-03-09 青岛海信电器股份有限公司 一种液冷块、液冷散热***以及激光投影机

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113659411A (zh) * 2021-08-17 2021-11-16 武汉裕鹏激光科技有限公司 一种基于水冷机构的高稳定性脉冲激光器
CN113659411B (zh) * 2021-08-17 2023-11-14 武汉裕鹏激光科技有限公司 一种基于水冷机构的高稳定性脉冲激光器
CN113543612A (zh) * 2021-09-15 2021-10-22 南昌龙旗信息技术有限公司 一种手机散热装置
CN113543612B (zh) * 2021-09-15 2021-12-07 南昌龙旗信息技术有限公司 一种手机散热装置

Also Published As

Publication number Publication date
CN112034667B (zh) 2023-01-24
CN112034667A (zh) 2020-12-04

Similar Documents

Publication Publication Date Title
WO2020244377A1 (zh) 一种激光投影设备
TWI307756B (en) Light-emitting diode heat-dissipating module and display apparatus applied thereto
WO2020211489A1 (zh) 一种空调室外机和空调器
CN213816733U (zh) 一种散热装置及激光光源
US11520219B2 (en) Heat dissipating module and projection device
CN211236547U (zh) 光处理投影机
CN111741650A (zh) 热超导散热板、散热器及5g基站设备
CN210401985U (zh) 一种分区液冷散热***及放映机
CN203673428U (zh) 一种笔记本电脑散热底座
CN210014475U (zh) 一种散热器、空调室外机和空调器
CN210014476U (zh) 一种散热器、空调室外机和空调器
CN210014477U (zh) 一种散热器、空调室外机和空调器
CN213182648U (zh) 回字形vc基板散热模组
WO2022047966A1 (zh) 一种显示装置
CN112764301A (zh) 光处理投影机
CN112764302A (zh) 光处理投影机
CN112782915A (zh) 光处理投影机
JP2011187599A (ja) 液冷ジャケット
CN217445704U (zh) 一种液晶电视机散热片
CN218601668U (zh) 一种间接液冷的lcd投影机密封光机
CN211655806U (zh) 一种具有液冷散热结构的户外移动电源及液冷散热结构
CN216485951U (zh) 一种棱镜的散热结构
CN211878405U (zh) 一种材质导热理想的投影仪光机散热器
CN107589621A (zh) 一种基于液态金属散热的投影仪
CN219302860U (zh) 一种便于散热的新型lcd投影机

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20818596

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20818596

Country of ref document: EP

Kind code of ref document: A1