Cooling device for liquid immersion heat dissipation of liquid crystal screen of projector

Abstract

The cooling device comprises a water pump, and the outer wall of the rear side of the water pump is connected with a water inlet pipe and a water outlet pipe; and the cold discharging assembly is arranged on the right side of the water pump and connected with the end, away from the water pump, of the water discharging pipe, and the position, located above the water discharging pipe, of the cold discharging assembly is fixedly connected with a connecting pipe. The invention relates to the technical field of projector liquid crystal screens. According to the cooling device for liquid immersion heat dissipation of the liquid crystal display of the projector, through the arrangement of the water pump, the cooling assembly and the cooling unit, liquid with the higher heat conductivity coefficient can be used for conducting heat dissipation on the liquid crystal display, and the defect that the temperature of the heating face of the liquid crystal display is greatly different due to the fact that traditional air cooling heat dissipation air volume is not uniform is overcome; and meanwhile, the liquid cooling heat dissipation heat conduction and heat exchange efficiency is higher, and the stable display of the liquid crystal screen is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of projector liquid crystal screens, and in particular to a cooling device for liquid immersion heat dissipation of projector liquid crystal screens. Background Art

[0002] An LCD projector is a projection device that uses liquid crystal display technology. Its basic working principle is to form an image by projecting a light source onto a liquid crystal panel, which controls the transmittance of the light. When the high-intensity light emitted by the projector light source passes through the LCD screen, due to the transmittance of the LCD screen, part of the light energy is converted into heat, causing the LCD screen to heat up. Therefore, cooling the LCD screen is a common method to maintain the operation of the LCD screen.

[0003] In the prior art, the heat dissipation method of the LCD screen of a single-chip or multi-chip LCD projector is mainly air cooling, and this traditional heat dissipation method has many obvious defects, such as: large wind noise, large differences in the temperature of the LCD screen heating surface caused by uneven heat dissipation air volume, low heat conduction and heat exchange efficiency, etc., resulting in low heat dissipation efficiency of the entire product, bringing huge uncertainty to the stable display of the LCD screen, and easily causing brightness reduction, dark screen, or even partial black screen.

[0004] Therefore, those skilled in the art provide a cooling device for liquid immersion heat dissipation of a projector LCD screen to solve the problems raised in the above background technology. Summary of the invention

[0005] The object of the present invention is to provide a cooling device for liquid immersion heat dissipation of a projector liquid crystal screen to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: The above technical objectives of the present invention are achieved through the following technical solutions: A cooling device for liquid immersion heat dissipation of a projector liquid crystal screen comprises a water pump, and a rear outer wall of the water pump is respectively connected with a water inlet pipe and a drain pipe; The radiator assembly is arranged on the right side of the water pump, the radiator assembly is connected to the end of the drain pipe away from the water pump, and the radiator assembly is located above the drain pipe and is fixedly connected with a connecting pipe; The cooling unit comprises a box body, a through hole is provided through the box body from front to back, a partition is fixedly connected in the through hole, a square groove 1 for light transmission is provided in the middle of the partition, and a mounting unit for mounting a liquid crystal screen is provided at a position near the square groove 1 on the rear side of the partition; A front cover plate is fixedly connected to the front side of the box body, and the middle part of the front cover plate is recessed backward to form a recessed part that fits with the partition plate. A space for the refrigerant to pass through is reserved between the periphery of the recessed part and the inner wall of the through hole to form a first coolant tank. An end of the water inlet pipe away from the water pump is fixedly connected to the front cover to connect the first coolant tank with the water pump. An end of the connecting pipe away from the radiator assembly is connected to a position of the outer wall of the box body close to the water inlet pipe to connect the first coolant tank with the radiator assembly. A square groove 2 corresponding to the position of the square groove 1 is opened in the middle part of the recessed part, and a glass cover plate 1 is arranged between the square grooves 1 and 2; The rear cover is fixedly connected to the rear side of the box body, and a square groove three corresponding to the position of the square groove one is opened in the middle of the rear cover, and the opening position of the square groove three is fixedly connected to the glass cover two, so that the rear cover, the glass cover two, the through hole, the partition and the glass cover one are spliced ​​to form a second coolant tank.

[0007] Furthermore, the partition is located on both sides of the square groove and fixedly connected with a plurality of heat-conducting fins, and the heat-conducting fins penetrate the partition so that the two sides of the heat-conducting fins are respectively located in the first cooling liquid tank and the second cooling liquid tank.

[0008] Furthermore, the partition is fixedly connected with a baffle at a position between the water inlet of the water inlet pipe and the drain outlet of the connecting pipe, and the baffle cuts off the first coolant tank so that the flow direction of the coolant in the first coolant tank is fixed.

[0009] Furthermore, the installation unit includes a positioning frame, and a positioning frame is arranged at the rear of the square groove one. The four corners of the positioning frame are fixedly connected to the partition through connecting columns, so that a gap for heat dissipation is left between the positioning frame and the partition. A mounting groove for placing the LCD screen is opened on the side of the positioning frame close to the square groove one, and the upper and lower sides of the positioning frame are connected with buckles for fixing the LCD screen.

[0010] Furthermore, a gap for placing the LCD cable is reserved between the rear cover and the box body, and a sealing gasket is connected to the gap.

[0011] Furthermore, a sealing ring 1 is arranged between the partition and the glass cover plate 1, and a sealing ring 2 is arranged between the recessed portion and the glass cover plate 1.

[0012] Furthermore, the top of the water pump is connected to a first filling port for filling the first coolant tank, and the outer wall of the rear cover is fixedly connected to a second filling port for filling the second coolant tank.

[0013] Furthermore, the radiator assembly includes a water-cooling radiator and a fan, and the fan is fixedly connected to the heat dissipation fin area of ​​the water-cooling radiator.

[0014] In summary, the present invention includes at least one of the following beneficial technical effects: 1. This cooling device for projector LCD screen liquid immersion heat dissipation can use liquid with higher thermal conductivity to dissipate heat for the LCD screen through the water pump, cold row assembly and cooling unit, which solves the problem of large difference in temperature of the heating surface of the LCD screen caused by uneven air volume of traditional air cooling. At the same time, liquid cooling heat dissipation has higher heat conduction and heat exchange efficiency, which greatly improves the stable display of the LCD screen; 2. This cooling device for liquid immersion heat dissipation of a projector LCD screen can avoid interfering with the propagation of light while liquid cooling the LCD screen by setting up a first cooling liquid tank and a second cooling liquid tank, thereby effectively ensuring the imaging effect of the LCD screen and significantly improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 The present invention is a schematic structural diagram of a cooling device for heat dissipation by liquid immersion of a projector liquid crystal screen.

[0017] Figure 2 The present invention is a schematic diagram of the structure from a rear side perspective of a cooling device for liquid immersion heat dissipation of a projector liquid crystal screen.

[0018] Figure 3 The invention discloses a cross-sectional view of a three-dimensional structure diagram of a cooling unit in a cooling device for heat dissipation by liquid immersion of a projector liquid crystal screen.

[0019] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0020] Figure 5 The present invention is a schematic diagram of the structure of a partition in a cooling device for liquid immersion heat dissipation of a projector liquid crystal screen from a rear side perspective.

[0021] Figure 6 The invention is a structural schematic diagram of a positioning frame in a cooling device for heat dissipation by liquid immersion of a projector liquid crystal screen.

[0022] Figure 7 The present invention is a schematic structural diagram of a rear side viewing angle of a front cover plate in a cooling device for liquid immersion heat dissipation of a projector liquid crystal screen.

[0023] Figure 8The present invention is a schematic structural diagram of a partition in a cooling device for liquid immersion heat dissipation of a projector liquid crystal screen according to the front side view.

[0024] Fig. 9 It is a structural schematic diagram of a first cooling liquid tank in a cooling device for liquid immersion heat dissipation of a projector liquid crystal screen according to the present invention.

[0025] In the figure, 1. water pump; 2. radiator assembly; 201. radiator; 202. fan; 3. cooling unit; 301. housing; 302. front cover; 303. rear cover; 4. water inlet pipe; 5. drain pipe; 6. connecting pipe; 7. through hole; 8. partition; 9. square groove one; 10. installation unit; 1001. positioning frame; 1002. connecting column; 1003. buckle; 11. recessed part; 12. first coolant tank; 13. square groove two; 14. glass cover one; 15. square groove three; 16. glass cover two; 17. second coolant tank; 18. thermal fin; 19. baffle; 20. installation groove; 21. sealing gasket; 22. sealing ring one; 23. sealing ring two; 24. injection port one; 25. injection port two. DETAILED DESCRIPTION

[0026] The present invention is further described below with reference to the accompanying drawings and specific embodiments: Example

[0027] Reference Figure 1 - Fig. 9 The present invention discloses a cooling device for liquid immersion heat dissipation of a projector liquid crystal screen, comprising a water pump 1, and a water inlet pipe 4 and a drain pipe 5 are respectively connected to the rear outer wall of the water pump 1; The radiator assembly 2 is arranged on the right side of the water pump 1. The radiator assembly 2 is connected to an end of the drain pipe 5 away from the water pump 1. The radiator assembly 2 is located above the drain pipe 5 and is fixedly connected to a connecting pipe 6. The cooling unit 3 comprises a box body 301, the box body 301 is provided with a through hole 7 from front to back, a partition 8 is fixedly connected in the through hole 7, a square groove 9 for light transmission is provided in the middle of the partition 8, and a mounting unit 10 for mounting a liquid crystal screen is provided at the rear side of the partition 8 near the square groove 9; The front cover plate 302 is fixedly connected to the front side of the box body 301, and the middle part of the front cover plate 302 is recessed backward to form a recessed portion 11 that fits with the partition plate 8. A space for the refrigerant to pass through is reserved between the periphery of the recessed portion 11 and the inner wall of the through hole 7 to form a first coolant tank 12. The end of the water inlet pipe 4 away from the water pump 1 is fixedly connected to the front cover so that the first coolant tank 12 is connected to the water pump 1. The end of the connecting pipe 6 away from the cold radiator assembly 2 is connected to the outer wall of the box body 301 near the water inlet pipe 4 so that the first coolant tank 12 is connected to the cold radiator assembly 2. A square groove 2 13 corresponding to the position of the square groove 1 9 is opened in the middle part of the recessed portion 11, and a glass cover plate 14 is arranged between the square groove 1 9 and the square groove 2 13; The rear cover plate 303 is fixedly connected to the rear side of the box body 301, and a square groove three 15 corresponding to the position of the square groove one 9 is opened in the middle of the rear cover plate 303, and a glass cover plate two 16 is fixedly connected to the opening position of the square groove three 15, so that the rear cover plate 303, the glass cover plate two 16, the through hole 7, the partition plate 8 and the glass cover plate one 14 are spliced ​​to form a second coolant tank 17.

[0028] In this embodiment, observe Figure 1 and Figure 2 It can be found that by providing a water pump 1, a radiator assembly 2 and a cooling unit 3, and the water pump 1 is connected to the cooling unit 3 through the water inlet pipe 4, connected to the radiator assembly 2 through the drain pipe, and the cooling unit 3 is connected to the radiator assembly 2 through the connecting pipe 6, the coolant can be drawn out through the cooling unit 3 when the water pump 1 is running, and then injected into the water-cooled radiator 201 of the radiator assembly 2, so that the heat is transferred to the heat dissipation fins of the water-cooled radiator 201, and finally the fan 202 blows the air flow, and the high-speed flowing air is used to take away the heat on the heat dissipation fins to achieve the cooling of the coolant. After the cooling is completed, the coolant is returned to the cooling unit 3 by the radiator assembly 2, which can be used to continuously cool the LCD screen, thereby solving the problem of large differences in the temperature of the heating surface of the LCD screen caused by uneven air volume in traditional air cooling. At the same time, the heat conduction and heat exchange efficiency of liquid cooling are higher, which greatly improves the stable display of the LCD screen.

[0029] However, the LCD screen needs to allow light to pass through to form an image during use, so Figure 3 It can be found that the cooling unit 3 is mainly composed of a box body 301, a front cover plate 302 and a rear cover plate 303, and a through hole 7 is set through the box body 301 from front to back, a partition 8 is fixedly connected in the through hole 7, a square groove 9 for light transmission is opened in the middle of the partition 8, and an installation unit 10 for installing a liquid crystal screen is set on the rear side of the partition 8 near the square groove 9, which can ensure that the LCD screen can be illuminated and imaged normally after installation.

[0030] Subsequently, a front cover plate 302 is fixedly connected to the front side of the box body 301, and the middle part of the front cover plate 302 is recessed backwards to form a recessed portion 11 that fits with the partition 8, and a square groove 2 13 corresponding to the position of the square groove 1 9 is opened in the middle part of the recessed portion 11, and a glass cover plate 14 is arranged between the square groove 1 9 and the square groove 2 13; a rear cover plate 303 is fixedly connected to the rear side of the box body 301, and a square groove 3 15 corresponding to the position of the square groove 1 9 is opened in the middle part of the rear cover plate 303, and a glass cover plate 2 16 is fixedly connected to the opening position of the square groove 3 15, so that the rear cover plate 303, the glass cover plate 2 16, the through hole 7, the partition 8 and the glass cover plate 1 14 are spliced ​​to form a second cooling liquid tank 17, at this time, the heat emitted by the LCD screen will be directly absorbed by the cooling liquid in the second cooling liquid tank 17, and recycled after being cooled by the water pump 1 and the radiator assembly 2.

[0031] However, since the circulation of the coolant requires flow, the flowing coolant will interfere with the light and affect the imaging effect of the LCD screen.

[0032] Therefore, space for the refrigerant to pass through is reserved between the four sides of the recessed portion 11 and the inner wall of the through hole 7 to form a first cooling liquid tank 12. The end of the water inlet pipe 4 away from the water pump 1 is fixedly connected to the front end cover, so that the first cooling liquid tank 12 is connected to the water pump 1. The end of the connecting pipe 6 away from the radiator assembly 2 is connected to the outer wall of the box body 301 near the water inlet pipe 4, so that the first cooling liquid tank 12 is connected to the radiator assembly 2. At this time, the coolant circulates between the first cooling liquid tank 12, the water pump 1 and the radiator assembly 2 to avoid interference with the coolant in the second cooling liquid tank 17. Subsequently, the box body 301 and the partition 8 are cooled by circulating the coolant in the first cooling liquid tank 12, and the coolant in the second cooling liquid tank 17 is cooled by the box body 301 and the partition 8, thereby achieving the effect of improving the heat dissipation efficiency of the LCD screen without affecting the imaging quality.

[0033] observe Figure 3 It can be found that since the light has to pass through the glass cover plate 14, the coolant, the LCD screen, the coolant and the glass cover plate 16 in sequence, the glass cover plate 14 and the glass cover plate 16 both need to use high-transmittance glass with high light transmittance, and the coolant needs to use a liquid with high light transmittance, high thermal conductivity and low electrical conductivity, such as coolants such as Thermaltake T1000 and BykskiCL-CLT-27D-X, which have the characteristics of high light transmittance, high thermal conductivity and low electrical conductivity, which will not be elaborated here.

[0034] In a further preferred embodiment of the present invention, Figure 5 , Figure 8 and Fig. 9As shown, the positions of the partition 8 on the left and right sides of the square groove 9 are fixedly connected with a plurality of heat-conducting fins 18, and the heat-conducting fins 18 penetrate the partition 8, so that the two sides of the heat-conducting fins 18 are respectively located in the first cooling liquid tank 12 and the second cooling liquid tank 17; The partition 8 is located between the water inlet of the water inlet pipe 4 and the drain outlet of the connecting pipe 6 and is fixedly connected with a baffle 19. The baffle 19 cuts off the first coolant tank 12 so that the flow direction of the coolant in the first coolant tank 12 is fixed.

[0035] In this embodiment, since the coolant in the second coolant tank 17 exchanges heat with the coolant in the first coolant tank 12 through the partition 8 and the box body 301, the heat exchange effect will be affected. Figure 5 and 8 It can be found that by fixing a plurality of heat-conducting fins 18 on the positions of the partition 8 on the left and right sides of the square groove 9, the heat-conducting fins 18 penetrate the partition 8 so that the two sides of the heat-conducting fins 18 are respectively located in the first cooling liquid tank 12 and the second cooling liquid tank 17, the heat exchange area can be effectively increased, thereby maximizing the heat exchange efficiency and enhancing the cooling effect on the LCD screen.

[0036] At the same time, since the water inlet of the water inlet pipe 4 and the drain outlet of the connecting pipe 6 are both connected to the first coolant tank 12, the combination Figure 8 and Fig. 9 It can be found that a baffle 19 is fixedly connected to the partition 8 between the water inlet of the water inlet pipe 4 and the drain outlet of the connecting pipe 6. The baffle 19 cuts off the first coolant tank 12, so that the flow direction of the coolant in the first coolant tank 12 is fixed, and the coolant input into the first coolant tank 12 can flow stably in one direction, so as to improve the circulation efficiency of the coolant.

[0037] In a further preferred embodiment of the present invention, Figure 5 and Figure 6 As shown, the mounting unit 10 includes a positioning frame 1001, and the positioning frame 1001 is arranged behind the square groove 9, and the four corners of the positioning frame 1001 are fixedly connected to the partition 8 through connecting columns 1002, so that a gap for heat dissipation is left between the positioning frame 1001 and the partition 8, and a mounting groove 20 for placing the LCD screen is opened on one side of the positioning frame 1001 close to the square groove 9, and buckles 1003 for fixing the LCD screen are connected to the upper and lower sides of the positioning frame 1001; A gap for placing LCD cables is reserved between the rear cover 303 and the box body 301 , and a sealing gasket 21 is connected to the gap.

[0038] In this embodiment, a positioning frame 1001 is provided behind the square groove 1001, a mounting groove 20 for placing a liquid crystal screen is provided on one side of the positioning frame 1001 close to the square groove 1001, and buckles 1003 for fixing the liquid crystal screen are connected to the upper and lower sides of the positioning frame 1001, so that the liquid crystal screen can be installed. Then, the four corners of the positioning frame 1001 are fixedly connected to the partition 8 through the connecting columns 1002, so that a gap for heat dissipation is left between the positioning frame 1001 and the partition 8, so that the coolant can contact the front and back sides of the liquid crystal screen, increase the contact area, and thus enhance the heat dissipation effect.

[0039] Since the LCD needs to be connected to an external signal source to change the displayed image, a gap for placing the LCD cable is reserved between the rear cover 303 and the box 301, so that the LCD can be installed in the cooling unit 3 and can still exchange signals with the external signal source normally, so that the LCD can be used normally. A sealing gasket 21 is connected to the gap to prevent the coolant from leaking through the gap, thereby ensuring the stability of the cooling unit 3.

[0040] In a further preferred embodiment of the present invention, Figure 4 As shown, a sealing ring 22 is provided between the partition plate 8 and the glass cover plate 14 , and a sealing ring 23 is provided between the recessed portion 11 and the glass cover plate 14 .

[0041] In this embodiment, since the glass cover plate 14 is sandwiched between the partition plate 8 and the recessed portion 11, in order to avoid leakage, the partition plate 8 and the recessed portion 11 and the glass cover plate 14 are arranged as follows: Figure 4 As shown in the state, a sealing ring 22 is arranged between the partition 8 and the glass cover plate 14 , and a sealing ring 23 is arranged between the recessed portion 11 and the glass cover plate 14 .

[0042] In a further preferred embodiment of the present invention, Figure 2 As shown, the top of the water pump 1 is connected to a liquid injection port 1 24 for injecting liquid into the first coolant tank 12 , and the outer wall of the rear cover plate 303 is fixedly connected to a liquid injection port 25 for injecting liquid into the second coolant tank 17 .

[0043] In this embodiment, since the first coolant tank 12 and the second coolant tank 17 are independently arranged, a liquid injection port 24 for injecting liquid into the first coolant tank 12 is connected to the top of the water pump 1, and a liquid injection port 25 for injecting liquid into the second coolant tank 17 is fixedly connected to the outer wall of the rear cover plate 303, which can be used to inject coolant into the first coolant tank 12 and the second coolant tank 17 respectively.

[0044] Working principle: open the liquid injection port 1 24 and the liquid injection port 25 respectively, and inject coolant into the first coolant tank 12 and the second coolant tank 17 respectively to dissipate heat for the liquid crystal screen.

[0045] When the LCD screen generates heat during operation, the heat of the LCD screen will be transferred to the coolant in the second coolant tank 17, and then transferred by the coolant to the thermal fins 18, the partition 8 and the box body 301, and then transferred by the thermal fins 18, the partition 8 and the box body 301 to the coolant in the first coolant tank 12, which is used to dissipate heat for the LCD screen.

[0046] While cooling the LCD screen, the water pump 1 will run synchronously to extract the high-temperature coolant in the first coolant tank 12 through the water inlet pipe 4, and then input it into the radiator assembly 2 through the drain pipe 5 for heat dissipation. Finally, the cooled low-temperature coolant will be returned to the first coolant tank 12 through the connecting pipe to ensure that the coolant in the first coolant tank 12 is always in a low-temperature state, thereby ensuring that the second coolant tank 17 can stably extract the heat from the LCD screen.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cooling device for liquid immersion heat dissipation of a projector LCD screen, characterized in that: It comprises a water pump (1), wherein the rear outer wall of the water pump (1) is respectively connected to a water inlet pipe (4) and a water outlet pipe (5); A cold-discharge assembly (2) is arranged on the right side of the water pump (1), the cold-discharge assembly (2) is connected to an end of the drain pipe (5) away from the water pump (1), and a connecting pipe (6) is fixedly connected to the cold-discharge assembly (2) at a position above the drain pipe (5); A cooling unit (3) comprising a box body (301), wherein a through hole (7) is provided through the box body (301) from front to back, a partition (8) is fixedly connected in the through hole (7), a square groove (9) for light transmission is provided in the middle of the partition (8), and a mounting unit (10) for mounting a liquid crystal screen is provided at a position near the square groove (9) on the rear side of the partition (8); A front cover plate (302) is fixedly connected to the front side of the box body (301), the middle part of the front cover plate (302) is recessed backward to form a recessed portion (11) that fits with the partition plate (8), and a space for the refrigerant to pass through is reserved between the periphery of the recessed portion (11) and the inner wall of the through hole (7) to form a first cooling liquid tank (12), the end of the water inlet pipe (4) away from the water pump (1) is fixedly connected to the front cover so that the first cooling liquid tank (12) is connected to the water pump (1), the end of the connecting pipe (6) away from the radiator assembly (2) is connected to the outer wall of the box body (301) near the water inlet pipe (4), so that the first cooling liquid tank (12) is connected to the radiator assembly (2), a square groove 2 (13) corresponding to the position of the square groove 1 (9) is opened in the middle part of the recessed portion (11), and a glass cover plate 1 (14) is arranged between the square groove 1 (9) and the square groove 2 (13); The rear cover plate (303) is fixedly connected to the rear side of the box body (301); a square groove three (15) corresponding to the position of the square groove one (9) is opened in the middle of the rear cover plate (303); a glass cover plate two (16) is fixedly connected to the opening position of the square groove three (15); the rear cover plate (303), the glass cover plate two (16), the through hole (7), the partition plate (8) and the glass cover plate one (14) are spliced ​​to form a second cooling liquid tank (17).

2. A cooling device for liquid immersion heat dissipation of a projector LCD screen according to claim 1, characterized in that: The partition (8) is located on both sides of the square groove (9) and is fixedly connected with a plurality of heat-conducting fins (18). The heat-conducting fins (18) penetrate the partition (8) so that the two sides of the heat-conducting fins (18) are respectively located in the first cooling liquid tank (12) and the second cooling liquid tank (17).

3. A cooling device for liquid immersion heat dissipation of a projector LCD screen according to claim 2, characterized in that: The partition (8) is fixedly connected to a baffle (19) at a position between the water inlet of the water inlet pipe (4) and the water outlet of the connecting pipe (6); the baffle (19) cuts off the first coolant tank (12), so that the flow direction of the coolant in the first coolant tank (12) is fixed.

4. A cooling device for liquid immersion heat dissipation of a projector LCD screen according to claim 3, characterized in that: The mounting unit (10) comprises a positioning frame (1001), the positioning frame (1001) being arranged behind the square groove one (9), the four corners of the positioning frame (1001) being fixedly connected to the partition (8) via connecting columns (1002), so that a gap for heat dissipation is left between the positioning frame (1001) and the partition (8), a mounting groove (20) for placing a liquid crystal screen is provided on a side of the positioning frame (1001) close to the square groove one (9), and buckles (1003) for fixing the liquid crystal screen are connected to the upper and lower sides of the positioning frame (1001).

5. A cooling device for liquid immersion heat dissipation of a projector LCD screen according to claim 4, characterized in that: A gap for accommodating liquid crystal display cables is left between the rear cover plate (303) and the box body (301), and a sealing gasket (21) is connected to the gap.

6. A cooling device for liquid immersion heat dissipation of a projector liquid crystal screen according to claim 5, characterized in that: A sealing ring 1 (22) is provided between the partition plate (8) and the glass cover plate 1 (14), and a sealing ring 2 (23) is provided between the recessed portion (11) and the glass cover plate 1 (14).

7. A cooling device for liquid immersion heat dissipation of a projector liquid crystal screen according to claim 6, characterized in that: The top of the water pump (1) is connected to a first injection port (24) for injecting liquid into the first coolant tank (12), and the outer wall of the rear cover plate (303) is fixedly connected to a second injection port (25) for injecting liquid into the second coolant tank (17).

8. The cooling device for liquid immersion heat dissipation of a projector liquid crystal screen according to claim 7, characterized in that: The radiator assembly (2) comprises a water-cooling radiator (201) and a fan (202); the fan (202) is fixedly connected to a heat dissipation fin region of the water-cooling radiator (201).

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