A liquid-cooled LCD projector device

Abstract

The application provides a liquid-cooled LCD projector device, which comprises cooling liquid, an optical assembly and flow control members. The cooling liquid is used to reduce the temperature of the projector. The optical assembly encloses a first cavity and a second cavity, and the outlet of the first cavity communicates with the inlet of the second cavity. One of the flow control members is located at the inlet of the first cavity, and the other flow control member is located at the inlet of the second cavity. The cooling liquid flows through one of the flow control members, the first cavity, the other flow control member and the second cavity in sequence. The above-mentioned combination achieves rectification.

Description

Technical Field

[0001] This application relates to the field of projectors, and more particularly to a liquid-cooled LCD projector device. Background Technology

[0002] When LCD projectors pursue high brightness, the LCD screen absorbs a large amount of non-transmittable light, leading to temperature rise, reduced transmittance, and color distortion. If heat dissipation is inadequate, it can also cause problems such as thermal drift in the image and increased noise.

[0003] In the prior art, such as Chinese patent CN222050702U, there is an optical component scheme with multiple light-transmitting elements mounted on a frame: a first light-transmitting element, an LCD screen, and a second light-transmitting element are arranged along one direction and together with the frame, they enclose the first and second liquid-cooling cavities. By setting multiple liquid-cooling channels and external interfaces on the frame, the liquid-cooling cavities can be connected in series or in parallel to improve heat dissipation and sealing convenience, aiming to improve the heat dissipation effect of the LCD screen and improve the overall image quality.

[0004] However, existing technologies are prone to coolant being injected directly into the cavity at high dynamic pressure, which easily creates water ripples and local vortices on the liquid surface / optical path area. This, combined with pump pulsation and sudden expansion of the inlet cross-section, results in a large transient velocity gradient and significant fluctuations in the free liquid surface, ultimately manifesting as bright and dark textures and jitter artifacts on the projected image.

[0005] Therefore, a liquid-cooled LCD projector device with a rectification structure is needed. Utility Model Content

[0006] In view of this, it is necessary to provide a liquid-cooled LCD projector device to solve the above problems.

[0007] Embodiments of this application provide a liquid-cooled LCD projector device, comprising:

[0008] Coolant, used to lower the temperature of the projector;

[0009] An optical component is formed by enclosing a first cavity and a second cavity, wherein the outlet of the first cavity is connected to the inlet of the second cavity;

[0010] A flow control element, wherein one of the flow control elements is located at the inlet of the first cavity and the other flow control element is located at the inlet of the second cavity;

[0011] The coolant flows sequentially through one of the flow control components, the first cavity, another flow control component, and the second cavity.

[0012] In at least one embodiment of this application, the projector device further includes:

[0013] The circulation component has one end connected to the inlet of the first cavity and the other end connected to the outlet of the second cavity;

[0014] The coolant circulates within the circulation component.

[0015] In at least one embodiment of this application, the loop component includes:

[0016] The liquid injection unit is equipped with a liquid inlet and a liquid outlet;

[0017] The first circulation tube is connected at one end to the liquid outlet;

[0018] The second circulation pipe is connected at one end to the liquid inlet and at the other end to the outlet.

[0019] In at least one embodiment of this application, the loop component further includes:

[0020] The liquid-cooled component is connected to the other end of the first circulation pipe;

[0021] The heat dissipation component is in contact with and connected to the liquid cooling component;

[0022] The third circulation pipe is connected at one end to the liquid cooling component and at the other end to the inlet.

[0023] In at least one embodiment of this application, the optical component includes:

[0024] The three sealing elements are arranged opposite to and spaced apart.

[0025] An inlet component is connected to each of the three aforementioned seals and is located on one side of each seal;

[0026] The outlet component is connected to each of the three aforementioned seals and is located on the other side of the seals;

[0027] The first cavity is formed by two adjacent sealing elements, the inlet element, and the outlet element.

[0028] In at least one embodiment of this application, the optical component further includes:

[0029] A display element is located within the first cavity, and the coolant fills and submerges the display element.

[0030] The front lenticule is fitted and connected to the sealing element and is located on the side opposite to the first cavity, and the inlet element and the outlet element are respectively connected to the two sides of the front lenticule;

[0031] The rear Fresnel lens is connected to the inlet and outlet components on both sides, and the rear Fresnel lens, the seal, the inlet component, and the outlet component together form the second cavity, with the coolant adhering to the rear Fresnel lens.

[0032] In at least one embodiment of this application, the first cavity and the second cavity are adjacent to each other and spaced apart.

[0033] In at least one embodiment of this application, the rear Fresnel lens includes a ribbed surface that faces away from the second cavity.

[0034] In at least one embodiment of this application, the flow control element has flow holes, and the coolant flows through two flow holes and enters the first cavity and the second cavity respectively, so as to control the flow rate of the coolant.

[0035] In at least one embodiment of this application, the flow control element has at least one flow passage.

[0036] When the flow control device is provided with multiple flow passages, the multiple flow passages are distributed in any way, either equally or staggeredly.

[0037] The liquid-cooled LCD projector device described above significantly reduces water ripples and local vortices caused by inlet expansion and pump pulsation by setting a flow control element at the inlet of the first cavity and the inlet of the second cavity, and by allowing the coolant to flow through in sequence in the order of flow control element-first cavity-flow control element-second cavity. Attached Figure Description

[0038] Figure 1 This is a perspective view of the liquid-cooled LCD projector described in this application;

[0039] Figure 2 This is a front view of the liquid-cooled LCD projector described in this application;

[0040] Figure 3 for Figure 2 Sectional view of AA;

[0041] Figure 4 for Figure 3 A magnified view of section B in the image;

[0042] Explanation of main component symbols

[0043] 100. Liquid-cooled LCD projector device; 10. Coolant; 20. Optical components; 21. First cavity; 22. Second cavity; 23. Seal; 24. Inlet; 25. Outlet; 26. Display; 27. Front Fresnel lens; 28. Rear Fresnel lens; 281. Ribbed surface; 30. Flow control component; 31. Flow passage; 40. Circulation assembly; 41. Liquid injection component; 411. Liquid inlet; 412. Liquid outlet; 42. First circulation pipe; 43. Second circulation pipe; 44. Liquid cooling component; 45. Heat dissipation component; 46. Third circulation pipe; Detailed Implementation

[0044] The embodiments of this application will now be described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0045] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or may also have an intervening component. When a component is considered to be "placed" on another component, it can be directly placed on the other component or may also have an intervening component. The terms "top," "bottom," "upper," "lower," "left," "right," "front," "back," and similar expressions used in this article are for illustrative purposes only.

[0046] This application provides a liquid-cooled LCD projector device, including a coolant, optical components, and a flow control element. The coolant is used to reduce the temperature of the projector. The optical components enclose a first cavity and a second cavity, with the outlet of the first cavity communicating with the inlet of the second cavity. One flow control element is located at the inlet of the first cavity, and the other flow control element is located at the inlet of the second cavity. The coolant flows sequentially through one flow control element, the first cavity, the other flow control element, and the second cavity.

[0047] The liquid-cooled LCD projector device described above significantly reduces water ripples and local vortices caused by inlet expansion and pump pulsation by setting a flow control element at the inlet of the first cavity and the inlet of the second cavity, and by allowing the coolant to flow through in sequence in the order of flow control element-first cavity-flow control element-second cavity.

[0048] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0049] Please see Figures 1-4 This application provides a liquid-cooled LCD projector device 100, including a coolant 10 (not shown), an optical assembly 20, and a flow control element 30. The coolant 10 is used to reduce the temperature of the projector. The optical assembly 20 encloses a first cavity 21 and a second cavity 22, with the outlet of the first cavity 21 communicating with the inlet of the second cavity 22. One flow control element 30 is located at the inlet of the first cavity 21, and the other flow control element 30 is located at the inlet of the second cavity 22. The coolant 10 flows sequentially through one flow control element 30, the first cavity 21, the other flow control element 30, and the second cavity 22.

[0050] In this embodiment, it should be noted that the liquid-cooled LCD projector device 100 includes a coolant 10, an optical component 20, and a flow control element 30 disposed at the inlet of the two cavities. The optical component 20 is formed by a cooperating housing and optical components to create two independent first cavities 21 and second cavities 22. The first cavity 21 is configured as a heat exchange cavity near the LCD display area, and the second cavity 22 is configured as a heat exchange cavity near the imaging-side optical component. The outlet of the first cavity 21 and the inlet of the second cavity 22 are connected by an internal channel, so that the two cavities form a sequential flow path in structure.

[0051] To suppress jet disturbances within the cavities, a flow control element 30 is installed at the inlet of the first cavity 21 and the inlet of the second cavity 22, respectively. The flow control element 30 is fixed to the upstream end face of the corresponding inlet, positioned opposite to the inlet flow section, and sealed tightly against the cavity, ensuring that the coolant 10 passes through the flow control element 30 for flow restriction and rectification before entering each cavity. The coolant 10 is an electrically insulating heat transfer fluid. Under external driving action, the coolant 10 flows sequentially through the flow control element 30 at the first inlet, the first cavity 21, the flow control element 30 at the second inlet, and the second cavity 22, before converging into the return section of the circuit.

[0052] The internal configuration of the two cavities is mainly flat or gradually changing cross-section to avoid the formation of sudden expansion or contraction structures in the vicinity of the inlet, thereby achieving a stable incoming flow in conjunction with the flow control device 30.

[0053] This embodiment does not limit the specific molding method and hole structure of the flow control component 30, but requires it to separate, rectify, and limit the incoming flow at the inlet to achieve a uniform and low-disturbance inflow state. At the same time, the specific components and layout of the external circuit are not limited, only ensuring that the coolant 10 can continuously and controllably pass through the two cavities in the above order.

[0054] First, before entering the first cavity 21 and the second cavity 22, the coolant 10 passes through the corresponding flow control device 30. The incoming jet is separated and rectified, which significantly weakens the dynamic pressure peak and velocity gradient at the inlet, reduces the probability of free liquid surface undulation and local vortex generation, and thus suppresses water ripples and bright and dark stripe artifacts caused by inlet abrupt expansion and drive pulsation.

[0055] Secondly, the outlet of the first cavity 21 is directly connected to the inlet of the second cavity 22, so that the two cavities form a series sequential flow. While ensuring that the first cavity completes effective heat exchange, the flow rate and heat are transferred to the second cavity in a predictable manner, avoiding uneven flow distribution and backflow interference caused by multiple parallel branches, thereby making the temperature field and velocity field in the two cavities more stable and controllable.

[0056] Furthermore, the flow control element 30, in conjunction with the sequential connection, transforms the inflow state from a high dynamic pressure jet to a uniform, low-disturbance flow, effectively reducing imaging jitter and image quality fluctuations caused by transient velocity gradients. Simultaneously, because the two cavities are subjected to liquid scouring in a fixed sequence, the temperature rise and temperature gradient of the device are suppressed during long-term operation, which helps maintain the optical stability and consistency of the display and imaging sides.

[0057] In one specific embodiment, the projector device further includes a circulation assembly 40. One end of the circulation assembly 40 is connected to the inlet of the first cavity 21, and the other end of the circulation assembly 40 is connected to the outlet of the second cavity 22. The coolant 10 circulates within the circulation assembly 40.

[0058] In this embodiment, it should be noted that the liquid-cooled LCD projector device is further provided with a circulation component 40, which is used to construct a closed loop between the two chambers and realize the continuous circulation of the coolant 10. One end of the circulation component 40 is connected to the inlet of the first chamber 21, serving as the upstream end of the liquid supply section.

[0059] The other end of the circulation component 40 is connected to the outlet of the second cavity 22, serving as the downstream end of the return section, so that the coolant 10 discharged from the second cavity 22 returns to the inlet of the first cavity 21 via the loop, realizing a closed-loop flow of "first cavity 21 - circulation component 40 - second cavity 22".

[0060] To ensure reliable connection and sealing, the circulation assembly 40 may include a sealing joint and flexible tubing for mating with the cavity interface, the inner diameter and direction of which are designed to be basically straight or gently curved according to the overall space and target flow rate.

[0061] The circulation component 40 closes and connects the outlet of the second cavity 22 with the inlet of the first cavity 21, forming a fixed sequence of circulation paths, avoiding uneven flow distribution and backflow interference that may occur in parallel systems, and stabilizing the boundary conditions of the incoming flow into the first cavity 21.

[0062] The return section is entirely supported by the circulation assembly 40 and sealed to the cavity interface. The leakage path is short and controllable. Combined with the drainage section, it can effectively reduce the free liquid surface fluctuations and secondary disturbances caused by residual air bubbles or transient pressure fluctuations.

[0063] In one specific embodiment, the circulation assembly 40 includes a liquid injection component 41, a first circulation pipe 42, a second circulation pipe 43, a liquid cooling component 44, a heat dissipation component 45, and a third circulation pipe 46. The liquid injection component 41 has an inlet 411 and an outlet 412. One end of the first circulation pipe 42 is connected to the outlet 412. One end of the second circulation pipe 43 is connected to the inlet 411, and the other end is connected to the outlet. The liquid cooling component 44 is connected to the other end of the first circulation pipe 42. The heat dissipation component 45 is in close contact with the liquid cooling component 44. One end of the third circulation pipe 46 is connected to the liquid cooling component 44, and the other end is connected to the inlet.

[0064] The circulation path specifically consists of a liquid injection component 41, a first circulation pipe 42, a second circulation pipe 43, a liquid cooling component 44, a heat dissipation component 45, and a third circulation pipe 46. The liquid injection component 41 is provided with independent inlet ports 411 and outlet ports 412 for replenishing, draining, and venting liquid during assembly or maintenance. Reusable sealing joints and sealing rings are preferentially configured on the outer sides of the inlet ports 411 and 412, forming a preferential venting channel between the highest point of the cavity and the liquid injection component 41.

[0065] One end of the first circulation pipe 42 is connected to the outlet 412 of the liquid injection component 41, and the other end is connected to the inlet of the liquid cooling component 44, for supplying replenished or circulated coolant 10 into the internal flow channel of the liquid cooling component 44. The liquid cooling component 44 is preferably a metal cooling block or a microchannel cooling unit, with internal guiding cavities for heat exchange with the circulating liquid. The heat dissipation component 45 is in close contact with the liquid cooling component 44, and the heat dissipation component 45 and the liquid cooling component 44 are combined using surface contact and thermally conductive interface materials. The thermally conductive interface material can be thermally conductive silicone grease or thermally conductive pads, etc., and is fixed by a pressure plate or screws to form an integrated heat exchange unit, allowing the heat absorbed by the liquid cooling component 44 to be released to the environment through the heat dissipation component 45. This embodiment does not limit whether the heat dissipation component 45 is equipped with airflow, only requiring that it be in close contact with the liquid cooling component 44 and maintain a long-term low thermal resistance. One end of the third circulation pipe 46 is connected to the outlet of the liquid cooling component 44, and the other end is connected to the inlet of the first cavity 21, so that the cooled coolant 10 is directly supplied to the flow control component 30 at the inlet of the first cavity 21.

[0066] One end of the second circulation pipe 43 is connected to the inlet 411 of the liquid injection component 41, and the other end is connected to the outlet of the second cavity 22, serving as a passage for liquid return and venting. To reduce additional pressure drop and pulsation transmission, the inner diameter and direction of the three pipe sections are preferably arranged to be basically straight or gently curved, and anti-loosening and anti-misinsertion structures are provided at key interfaces.

[0067] The coolant 10 first enters the liquid cooling component 44 through the first circulation pipe 42, and efficiently discharges heat through the heat exchange interface that is in contact with the heat dissipation component 45. Then it reaches the inlet of the first cavity 21 through the third circulation pipe 46, so that the incoming flow into the cavity has a lower and more stable temperature, providing stable boundary conditions for the rectification and flow restriction of the inlet flow control component 30.

[0068] The through-path of the liquid injection component 41's outlet 412 - first circulation pipe 42 - liquid cooling component 44 - third circulation pipe 46 - first cavity 21 - second cavity 22 - second circulation pipe 43 - liquid injection component 41's inlet 411 allows for unidirectional in-situ liquid injection and synchronous venting during assembly or maintenance. Air bubbles are preferentially recovered along the second circulation pipe 43 to the top chamber of the liquid injection component 41, reducing the compressible volume effect, pulsation amplification, and secondary disturbances caused by residual air bubbles.

[0069] The surface contact between the liquid cooling component 44 and the heat dissipation component 45 reduces the contact thermal resistance. The third circulation pipe 46 is directly connected to the inlet of the first cavity 21, reducing redundant volume and bending pressure drop. This results in a lower circulating liquid temperature and a more stable flow rate under the same pump power, thereby further suppressing the triggering conditions of water ripples and local vortices.

[0070] In one specific embodiment, the optical component 20 includes a sealing element 23, an inlet element 24, an outlet element 25, a display element 26, a front Fresnel lens 27, and a rear Fresnel lens 28. The three sealing elements 23 are arranged opposite to each other and spaced apart. The inlet element 24 is connected to each of the three sealing elements 23 and is located on one side of each sealing element 23. The outlet element 25 is connected to each of the three sealing elements 23 and is located on the other side of each sealing element 23. Two adjacent sealing elements 23, the inlet element 24, and the outlet element 25 enclose and form the first cavity 21. The display element 26 is located within the first cavity 21, and the coolant 10 fills and submerges the display element 26. The front Fresnel lens 27 is fitted and connected to the sealing element 23, and the front Fresnel lens 27 is located on the side facing away from the first cavity 21. The inlet element 24 and the outlet element 25 are connected to the two sides of the front Fresnel lens 27, respectively. The rear Fresnel lens 28 is connected to the inlet 24 and the outlet 25 on both sides, and the rear Fresnel lens 28, the seal 23, the inlet 24 and the outlet 25 enclose the second cavity 22, and the coolant 10 is attached to the rear Fresnel lens 28.

[0071] In this embodiment, it should be noted that the optical component 20 consists of a basic frame composed of at least three independent and spaced-apart sealing elements 23. An inlet element 24 and an outlet element 25 are connected between the sealing elements 23, with the inlet element 24 located on one side of the sealing element 23 and the outlet element 25 located on the other side. Thus, two adjacent sealing elements 23, along with their corresponding inlet element 24 and outlet element 25, enclose a first cavity 21. The first cavity 21 serves as a heat exchange chamber on the display side, and a display element 26, such as an LCD, is disposed inside it. After assembly, the first cavity 21 is filled with coolant 10, immersing the display element 26 in the coolant.

[0072] On the opposite side of the first cavity 21, a front fractal mirror 27 is disposed and fitted to the sealing member 23. The two sides of the front fractal mirror 27 are connected to the inlet member 24 and the outlet member 25, respectively, to ensure the rigidity of the display light path and the outer structure. Adjacent to the display side, a rear fractal mirror 28 is also disposed, with its two sides also connected to the inlet member 24 and the outlet member 25, forming a second cavity 22 together with the adjacent sealing member 23, inlet member 24, and outlet member 25. During operation, the second cavity 22 is filled with circulating coolant 10 and is in contact with the optical surface of the rear fractal mirror 28 for direct liquid cooling heat exchange of the rear fractal mirror 28.

[0073] To ensure the overall thermal conductivity and sealing performance of the component, the seal 23 is preferably a composite structure of elastic seal or sealant and rigid support. The inlet 24 and outlet 25 are sealed with the seal 23 by surface sealing and are equipped with positioning steps or limiting ribs to ensure the stability of the cavity enclosure shape.

[0074] The first cavity 21 and the second cavity 22 are connected to the interface of the circulation loop through an internal communication relationship, but they are structurally adjacent and spaced apart to reduce mutual flow interference and facilitate independent assembly and maintenance. This embodiment does not limit the specific materials and shapes of the seal 23, inlet 24, outlet 25, and front / rear Fresnel lenses 28. As long as they meet the requirements of forming a cavity, being compatible with the coolant 10, and achieving the aforementioned fit and sealing requirements, they are all within the scope of this embodiment.

[0075] First, by enclosing the display side and the imaging side through the three sealing parts 23, the inlet part 24 and the outlet part 25, the first cavity 21 is structured and partitioned so that the LCD is fully immersed in heat exchange, forming a uniform liquid coating and a small temperature gradient.

[0076] The adjacent and spaced second cavity 22 is dedicated to the cooling of the rear Fresnel lens 28. The functions of the two cavities do not interfere with each other, which helps to reduce temperature drift and aberration fluctuations caused by mutual thermal coupling. Secondly, the front Fresnel lens 27 is bonded to the seal 23 and arranged on the side away from the first cavity 21. It maintains light transmission and structural rigidity without direct contact with the coolant 10, avoiding the influence of free liquid surface disturbance on the front-end imaging. The rear Fresnel lens 28 is placed in the second cavity 22 and bonded to the coolant 10, which can directly introduce the heat absorbed / conducted by the lens into the circulating fluid, shortening the thermal path and accelerating steady-state establishment. Furthermore, the inlet 24 and outlet 25 are respectively arranged on both sides of the seal 23, so that the two cavities form regular inlet or outlet flow boundaries geometrically.

[0077] In one specific embodiment, the first cavity 21 and the second cavity 22 are adjacent to each other and spaced apart.

[0078] In this embodiment, it should be noted that the first cavity 21 and the second cavity 22 are structurally adjacent and spaced apart. The two cavities are arranged side by side along the assembly reference plane of the optomechanical system, with a gap formed by housing ribs or heat insulation / vibration damping pads in the middle to maintain a fixed geometric gap.

[0079] The two cavities are connected to the external circulation channel through their respective inlet flow control components 30, and a single connecting channel is provided only between the outlet of the first cavity 21 and the inlet of the second cavity 22 to achieve sequential flow. Adjacent arrangement allows the optical components and the sealing components 23 to share the same assembly reference and fastening surface, while the gap serves to limit movement, insulate against heat, and dampen vibration, avoiding thermal and mechanical coupling caused by direct rigid contact between the two cavity shells. This embodiment does not limit the specific values ​​of the gap distance and the isolation material; as long as a stable geometric gap and assembly tolerance absorption are formed while ensuring installation strength and light transmission space, the requirements for adjacent and spaced arrangement can be met.

[0080] The adjacent layout significantly shortens the pipe length and number of bends, reduces additional pressure drop and pulsation transmission, and makes the incoming flow boundary into the second cavity 22 more stable, which is conducive to suppressing water ripples and eddies together with the inlet flow control device 30.

[0081] In one specific embodiment, the rear Fresnel lens 28 includes a ribbed surface 281, which is opposite to the second cavity 22.

[0082] In this embodiment, it should be noted that the rear Fresnel lens 28 is a Fresnel lens with one threaded surface and one smooth surface. The threaded surface 281 is positioned away from the second cavity 22, meaning it does not contact the coolant 10 within the second cavity 22. The smooth surface, on the other hand, faces the second cavity 22 and is in contact with the coolant 10 for heat exchange.

[0083] The ribbed surface 281 does not come into contact with the liquid, avoiding the formation of liquid film or meniscus in the microstep groove and the changes in equivalent refractive index and optical path caused by temperature and flow rate, significantly reducing image thermal drift and aberration fluctuations, and maintaining MTF and contrast.

[0084] In one specific embodiment, the flow control element 30 has flow holes 31, through which the coolant 10 flows and enters the first cavity 21 and the second cavity 22 respectively, so as to control the flow rate of the coolant 10.

[0085] In this embodiment, it should be noted that the flow control element 30 is respectively disposed at the inlet of the first cavity 21 and the second cavity 22, and each flow control element 30 is provided with an overflow hole 31.

[0086] Preferably, the flow passage 31 is a circular or micro-hole array structure that penetrates the thickness of the flow control element 30, and its diameter, spacing and number are determined according to the target flow rate and allowable pressure drop.

[0087] The flow control element 30 is fixed to the inlet end face in a face-sealing manner, so that the coolant 10 entering each cavity must pass through the flow hole 31 to limit the flow before entering the cavity.

[0088] The two flow control components 30 can be configured with the same or different orifice diameters and orifice numbers. The combination of flow holes 31 at the inlet of the first cavity 21 is used to prioritize the volumetric flow rate and uniformity of the incoming flow at the LCD end, while the combination of flow holes 31 at the inlet of the second cavity 22 is used to suppress jet impact and secondary disturbances.

[0089] To reduce local turbulence, a chamfer or a gradually changing inlet section is provided between the flow control element 30 and the inlet channel. For ease of maintenance and parameter adjustment, the flow control element 30 can be designed as a replaceable insert or a press-fit component with a positioning notch, maintaining repeatability after disassembly and assembly. This embodiment does not limit the specific shape and array pattern of the flow holes 31; any method that enables independent flow rate / volume control and rectification of the coolant 10 entering the first and second chambers 22 falls within the scope of this embodiment.

[0090] First, the flow passage 31 restricts and rectifies the inlet jet, dividing the high dynamic pressure flow into multiple small streams, significantly reducing the velocity gradient and impact dynamic pressure at the inlet, suppressing free liquid surface undulations and local eddies, thereby reducing water ripples and bright and dark stripe artifacts in the projected image.

[0091] Secondly, the two inlets achieve independent flow distribution through their respective flow holes 31. The aperture and opening ratio can be set differently according to the different requirements of the display element 26 in the first cavity 21 and the rear mirror 28 in the second cavity 22 for heat exchange and flow stability, so that the two cavities can obtain a more matched inflow boundary and reduce the flow fluctuation caused by loop coupling.

[0092] Furthermore, the flow passage 31 creates a predictable pressure drop at the inlet, improving the system's ability to filter out pump pulsations and upstream disturbances. This keeps the incoming flow into the cavity in a low-pulsation, low-disturbance state, which, combined with the smooth geometric transition within the cavity, helps to form a more stable temperature and velocity field.

[0093] In one specific embodiment, it should be noted that the flow control element 30 has at least one flow passage 31 for limiting and rectifying the incoming flow at the inlet. When the flow control element 30 has multiple flow passages 31, the multiple flow passages 31 can be arranged in any of the following ways: evenly distributed (e.g., in a regular array with equal diameter and spacing) or staggered (e.g., in a row-column or concentric ring arrangement with alternating diameters or spacing) to adapt to different target flow rates and incoming flow uniformity requirements.

[0094] A uniform distribution facilitates the acquisition of an isotropic inlet velocity field. A staggered distribution, by breaking the row-and-column symmetry, reduces the coupling and merging of adjacent jets, weakening the formation of large-scale striped structures. The flow control element 30 is preferably a replaceable insert or press-fit plate, made of stainless steel, aluminum alloy, or engineering plastic resistant to coolant 10.

[0095] When only a single flow passage 31 is set, clear current limiting and reference rectification can be achieved under low flow or commissioning conditions, which can be used to verify the matching of loop voltage drop and flow.

[0096] When multiple flow holes 31 are evenly distributed, the inlet velocity profile is more uniform, which can effectively reduce free surface undulation and suppress regular striped water ripples. When multiple flow holes 31 are staggered, they can further disperse in-phase interference and weaken the large-scale vortices and bright-dark bands caused by the merging of adjacent small jets, thereby maintaining image stability under high flow or high power conditions.

[0097] Therefore, the liquid-cooled LCD projector device 100 provided above significantly reduces the water ripples and local vortices caused by inlet expansion and pump pulsation by setting a flow control element 30 at the inlet of the first cavity 21 and the second cavity 22, and by allowing the coolant 10 to flow through in the order of flow control element 30-first cavity 21-flow control element 30-second cavity 22.

[0098] The above description is merely an embodiment of this application. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this application, but these improvements all fall within the protection scope of this application.

Claims

1. A liquid-cooled LCD projector device, characterized in that, include: Coolant, used to lower the temperature of the projector; An optical component is formed by enclosing a first cavity and a second cavity, wherein the outlet of the first cavity is connected to the inlet of the second cavity; A flow control element, wherein one of the flow control elements is located at the inlet of the first cavity and the other flow control element is located at the inlet of the second cavity; The coolant flows sequentially through one of the flow control components, the first cavity, another flow control component, and the second cavity.

2. The liquid-cooled LCD projector device according to claim 1, characterized in that, The projector device also includes: The circulation component has one end connected to the inlet of the first cavity and the other end connected to the outlet of the second cavity; The coolant circulates within the circulation component.

3. The liquid-cooled LCD projector device according to claim 2, characterized in that, The loop component includes: The liquid injection unit is equipped with a liquid inlet and a liquid outlet; The first circulation tube is connected at one end to the liquid outlet; The second circulation pipe is connected at one end to the liquid inlet and at the other end to the outlet.

4. The liquid-cooled LCD projector device according to claim 3, characterized in that, The loop component also includes: The liquid-cooled component is connected to the other end of the first circulation pipe; The heat dissipation component is in contact with and connected to the liquid cooling component; The third circulation pipe is connected at one end to the liquid cooling component and at the other end to the inlet.

5. The liquid-cooled LCD projector device according to claim 1, characterized in that, The optical components include: The three sealing elements are arranged opposite to and spaced apart. An inlet component is connected to each of the three aforementioned seals and is located on one side of each seal; The outlet component is connected to each of the three aforementioned seals and is located on the other side of the seals; The first cavity is formed by two adjacent sealing elements, the inlet element, and the outlet element.

6. The liquid-cooled LCD projector device according to claim 5, characterized in that, The optical components also include: A display element is located within the first cavity, and the coolant fills and submerges the display element. The front lenticule is fitted and connected to the sealing element and is located on the side opposite to the first cavity, and the inlet element and the outlet element are respectively connected to the two sides of the front lenticule; The rear Fresnel lens is connected to the inlet and outlet components on both sides, and the rear Fresnel lens, the seal, the inlet component, and the outlet component together form the second cavity, with the coolant adhering to the rear Fresnel lens.

7. The liquid-cooled LCD projector device according to claim 1, characterized in that, The first cavity and the second cavity are adjacent to each other and spaced apart.

8. A liquid-cooled LCD projector device according to claim 6, characterized in that, The rear lens includes a ribbed surface that faces away from the second cavity.

9. A liquid-cooled LCD projector device according to claim 1, characterized in that, The flow control device has flow holes, through which the coolant flows and enters the first cavity and the second cavity respectively, thereby controlling the flow rate of the coolant.

10. A liquid-cooled LCD projector device according to claim 9, characterized in that... The flow control device has at least one flow passage. When the flow control device is provided with multiple flow passages, the multiple flow passages are distributed in any way, either equally or staggeredly.

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