A laser projector heat dissipation waterway structure

Abstract

The utility model discloses a kind of laser projector heat dissipation waterway structures, it includes heat dissipation substrate, liquid distribution manifold mechanism and flow regulating mechanism.Liquid distribution manifold mechanism is integrated in heat dissipation substrate, including liquid inlet main pipe, back liquid main pipe and multiple heat dissipation branch pipes communicated with it, for guiding cooling liquid to flow through different heating area;Flow regulating mechanism is arranged at each heat dissipation branch pipe and liquid inlet main pipe connection, cooling liquid flow is controlled by adjusting flow cross section.This application can realize the accurate distribution of the cooling liquid flow of multiple heating areas, and improve the space integration of waterway structure.

Description

Technical Field

[0001] This utility model relates to the technical field of heat dissipation for lighting equipment, and in particular to a heat dissipation water circuit structure for a laser projector. Background Technology

[0002] A laser projector is a device that uses laser as a light source to project images. It is widely used in cinemas, exhibitions, education and other fields. Laser light sources have advantages such as high brightness, long life and good color performance. However, they also generate a lot of heat during operation. If the heat cannot be dissipated in a timely and effective manner, it may affect the performance stability of optical components and the reliability of the whole machine.

[0003] To ensure the normal operation of a laser projector, a corresponding heat dissipation system is usually required. Among them, water cooling is widely used due to its efficient and stable heat dissipation capabilities. The water cooling system uses circulating coolant to exchange heat with the heat-generating components, thereby cooling down the critical components. Common heat dissipation structures include water channels set around the laser module, which use pumps to drive the coolant circulation and release heat through external heat dissipation devices.

[0004] However, most existing laser projector cooling water circuit structures adopt a single path or simple parallel flow channel design. When the coolant flows through multiple heat-generating areas, there is uneven flow distribution in each area, resulting in limited cooling effect in some areas. At the same time, the layout of the flow channel has high requirements for space utilization, and it is difficult to achieve optimized layout in compact equipment. Therefore, in practical applications, the existing water circuit structure has certain limitations in terms of heat dissipation uniformity and space adaptability. Utility Model Content

[0005] The purpose of this invention is to provide a heat dissipation water circuit structure for a laser projector to overcome the shortcomings of the existing technology.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A heat dissipation water channel structure for a laser projector includes a heat dissipation substrate, a liquid distribution manifold mechanism, and a flow regulation mechanism, wherein: The liquid distribution manifold mechanism is integrated inside the heat dissipation substrate. It includes an inlet manifold, a return manifold, and multiple heat dissipation branches. The inlet manifold and the return manifold are arranged parallel to each other inside the heat dissipation substrate. The two ends of the multiple heat dissipation branches are respectively connected to the side walls of the inlet manifold and the return manifold. The heat dissipation branches are used to guide the coolant to flow through different heat-generating areas.

[0007] The flow regulation mechanism, wherein multiple flow regulation mechanisms are respectively disposed at the connection between each heat dissipation branch and the liquid inlet manifold, the flow regulation mechanism regulates the flow rate of the coolant flowing into the corresponding heat dissipation branch by changing the flow cross section of the corresponding heat dissipation branch.

[0008] Optionally, the heat dissipation substrate includes a substrate body and a sealing cover. The liquid inlet manifold, the liquid return manifold, and the multiple heat dissipation branches are all grooves formed on the top surface of the substrate body. The sealing cover is fixed to the top surface of the substrate body, and a sealing gasket is provided between the bottom surface of the sealing cover and the top surface of the substrate body. The sealing cover seals the grooves to form a complete fluid channel.

[0009] Optionally, each of the flow regulating mechanisms includes a valve seat, a flow regulating valve core, and a drive rod. The valve seat is formed on the substrate body and located at the inlet of the heat dissipation branch. The flow regulating valve core is threadedly engaged with the valve seat. One end of the drive rod is fixedly connected to the flow regulating valve core, and the other end of the drive rod extends to the outside of the heat dissipation substrate.

[0010] Optionally, each of the flow regulating mechanisms further includes a drive knob and a positioning sleeve. The drive knob is fixed to the end of the drive rod away from the flow regulating valve core. The positioning sleeve is fixed to the outer wall of the heat dissipation substrate and the drive rod passes through the inner hole of the positioning sleeve. A sealing ring assembly is provided between the outer wall of the drive rod and the inner wall of the positioning sleeve. A scale mark is provided on the outer peripheral wall of the drive knob.

[0011] Optionally, an inlet port and an outlet port are fixedly provided on the outer wall of the heat dissipation substrate. The inner cavity of the inlet port is connected to one end of the inlet manifold, and the inner cavity of the outlet port is connected to one end of the return manifold. Both the inlet port and the outlet port include a threaded connector structure for connecting to an external pipeline.

[0012] Optionally, the top of the sealing cover is provided with an observation window assembly, which includes an observation through hole opened on the sealing cover, a transparent window fixed in the observation through hole, and a clamping ring for pressing and fixing the transparent window. The position of the observation through hole corresponds to the position of any of the heat dissipation branches below.

[0013] Optionally, the substrate body is further provided with a plurality of temperature measurement blind holes. The bottom of each temperature measurement blind hole is adjacent to the side wall of one of the heat dissipation branches. The temperature measurement blind holes are used to accommodate the probes of temperature sensors to monitor the temperature of different heat dissipation branch areas respectively.

[0014] Optionally, the bottom of the substrate body is integrally formed with multiple reinforcing ribs, which are distributed along the length or width direction of the substrate body. The arrangement of the reinforcing ribs increases the structural strength of the substrate body.

[0015] Optionally, the inner wall surface of the heat dissipation branch is processed with a turbulence structure, which is a spiral groove or staggered ribs along the fluid flow direction. The function of the turbulence structure is to increase the turbulence of the coolant in the channel.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: A cooling water circuit structure for a laser projector, featuring a manifold mechanism and a flow regulation mechanism, distributes coolant into multiple cooling branches after entering through the main inlet pipe. Rotating a drive knob connected to a flow regulating valve core changes the axial position of the valve core within the valve seat, thereby precisely adjusting the flow cross-sectional area at the inlet of each cooling branch. This achieves independent and precise control of the coolant flow rate to each heat-generating area, solving the problem of uneven flow distribution caused by varying flow resistance and improving the overall uniformity of heat dissipation. Simultaneously, all water channels are integrated within the heat dissipation substrate, formed by grooves on the substrate body and a sealing cover. This highly integrated structure significantly reduces the space occupied by the cooling system, meeting the compact design requirements of laser projectors, and reducing external pipe connection points, thus lowering the risk of system leakage. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a heat dissipation water circuit structure for a laser projector according to the present invention; Figure 2 This is an exploded structural diagram of the heat dissipation substrate of this utility model; Figure 3 This is a partially enlarged schematic diagram of the flow regulation mechanism according to an embodiment of this application; Figure 4 This is a schematic diagram of the internal flow channel layout of the heat dissipation substrate of this utility model; Explanation of reference numerals in the attached figures: 1. Heat dissipation base plate; 2. Liquid distribution manifold mechanism; 3. Flow regulation mechanism; 4. Liquid inlet main pipe; 5. Liquid return main pipe; 6. Heat dissipation branch; 7. Base plate body; 8. Sealing cover plate; 9. Valve seat; 10. Flow regulating valve core; 11. Drive rod; 12. Drive knob; 13. Positioning sleeve; 14. Liquid inlet interface; 15. Liquid outlet interface; 16. Observation window assembly; 17. Temperature measuring blind hole; 18. Reinforcing rib. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings: Please see Figures 1 to 4 This utility model provides a heat dissipation water channel structure for a laser projector. This structure is applied to the liquid cooling system of the high heat density area inside the laser projector. By integrating the design of the coolant flow path and accurately distributing the flow rate, uniform and efficient heat dissipation is achieved for multiple heat-generating components.

[0019] Please see Figures 1 to 4 This utility model provides a technical solution: a heat dissipation water circuit structure for a laser projector, which mainly includes a heat dissipation substrate 1, a liquid distribution manifold mechanism 2 integrated inside the heat dissipation substrate 1, and multiple flow adjustment mechanisms 3.

[0020] Specifically, refer to Figure 1 and Figure 2 The heat dissipation substrate 1 is the fundamental load-bearing component of the entire water channel structure. It has a plate-like structure and is typically made of a thermally conductive metal material, such as aluminum alloy or copper, and is integrally formed through precision casting or machining. The heat dissipation substrate 1 includes a substrate body 7 and a sealing cover plate 8. The top surface of the substrate body 7 has grooves with predetermined paths, which form the flow channel prototype of the manifold mechanism 2. The outer contour of the sealing cover plate 8 matches the top surface of the substrate body 7 and is fixed to the top surface of the substrate body 7 by multiple bolts or other fasteners. A complete sealing gasket is provided between the top surface of the substrate body 7 and the bottom surface of the sealing cover plate 8. This sealing gasket is typically made of a corrosion-resistant, high-temperature-resistant elastic material, such as fluororubber or silicone rubber. When the sealing cover plate 8 is pressed against the substrate body 7, the sealing gasket is compressed and deformed, filling the tiny gap between them, reliably sealing all the grooves on the top surface of the substrate body 7 with liquid tightness, thereby transforming the open grooves into closed internal fluid channels capable of withstanding a certain pressure. To enhance the overall mechanical strength and deformation resistance of the heat dissipation substrate 1, multiple reinforcing ribs 18 are integrally formed on the bottom of the substrate body 7. These reinforcing ribs 18 are distributed in a grid-like or strip-like manner along the length or width direction of the substrate body 7, increasing the cross-sectional moment of inertia of the structure and improving the rigidity of the heat dissipation substrate 1 without significantly increasing the weight.

[0021] Reference Figure 2 and Figure 4The manifold mechanism 2 is the core component for distributing and collecting coolant, and it is fully integrated inside the heat dissipation substrate 1. The manifold mechanism 2 includes an inlet main pipe 4, a return main pipe 5, and multiple heat dissipation branches 6 connecting the two. Both the inlet main pipe 4 and the return main pipe 5 are deep and wide grooves formed on the top surface of the substrate body 7, extending parallel to each other within the substrate body 7 and located on opposite sides of the heat dissipation area. The multiple heat dissipation branches 6 are relatively narrow parallel grooves connecting the grooves of the inlet main pipe 4 and the return main pipe 5. The two ends of each heat dissipation branch 6 are respectively connected to the sidewalls of the grooves of the inlet main pipe 4 and the return main pipe 5. In practical applications, the bottom of the heat dissipation substrate 1 will be in close contact with multiple heat sources of the laser projector, such as the laser array and driver circuit board. As the coolant flows through these heat dissipation branches 6, it absorbs and carries away the heat generated by the heat sources. To enhance heat exchange, in some embodiments, the inner wall surface of the heat dissipation branch 6 is also processed with a turbulence structure. This turbulence structure can be a spiral groove extending along the length of the channel, or it can be tiny ribs arranged alternately along the fluid flow direction. The presence of these turbulence structures disrupts the stable laminar flow state of the fluid boundary layer, increases the turbulence of the coolant within the channel, promotes internal mixing of the fluid, and thus improves the convective heat transfer coefficient between the coolant and the channel wall.

[0022] Reference Figure 1 and Figure 3 The flow regulating mechanism 3 is crucial for achieving independent and precise control of the flow rate of each heat dissipation branch 6. This structure includes multiple flow regulating mechanisms 3, the same number as the heat dissipation branches 6, with each mechanism 3 positioned at the connection inlet of the corresponding heat dissipation branch 6 to the main inlet pipe 4. Each flow regulating mechanism 3 includes a valve seat 9 formed on the substrate body 7, a flow regulating valve core 10 threadedly engaged with the valve seat 9, and a drive rod 11 fixedly connected to the flow regulating valve core 10. The valve seat 9 is a precision hole structure with internal threads machined into the inlet of the heat dissipation branch 6 on the substrate body 7. The front end of the flow regulating valve core 10 is typically tapered or needle-shaped, and its rod portion has external threads that match the internal threads of the valve seat 9. The flow regulating valve core 10 is screwed into the valve seat 9 via these threads. The drive rod 11 is a slender metal rod, one end of which is firmly connected to the tail of the flow regulating valve core 10, for example, by welding or threading, while the other end extends through the sidewall of the heat dissipation substrate 1 to the outside.

[0023] To ensure convenient operation and reliable sealing of the flow regulating mechanism 3, each flow regulating mechanism 3 also includes a drive knob 12 and a positioning sleeve 13. The positioning sleeve 13 is fixed to the outer wall of the heat dissipation base plate 1 by thread or press fitting, and has a through hole in its center through which the drive rod 11 passes. Between the outer wall of the drive rod 11 and the inner wall of the positioning sleeve 13, a sealing ring group consisting of at least two O-rings is provided. These sealing rings are installed in the annular groove on the inner wall of the positioning sleeve 13, forming a dynamic seal for the passing drive rod 11 and preventing internal coolant from leaking outward along the gap between the drive rod 11 and the positioning sleeve 13. The drive knob 12 is fixed to the exposed end of the drive rod 11 away from the flow regulating valve core 10, and its shape is ergonomically designed, with knurled or grooved surfaces. On the outer peripheral wall of the drive knob 12, there are also scale markings, such as numbers or marking lines from 0 to 10. Together with the fixed indicator points on the outer wall of the heat dissipation base plate 1, the operator can intuitively understand and record the opening position of each adjustment mechanism.

[0024] In addition, this cooling water circuit structure also includes some auxiliary components. (See reference...) Figure 1 An inlet port 14 and an outlet port 15 are fixedly disposed on the outer wall of the heat dissipation substrate 1. The inner cavity of the inlet port 14 is connected to one end of the inlet manifold 4 through an internal flow channel, while the inner cavity of the outlet port 15 is connected to one end of the return manifold 5. Both ports include standardized threaded connector structures, which can be directly connected to the hoses or rigid pipes of the external cooling circulation system. In some embodiments, refer to... Figure 1 The top of the sealing cover 8 is also equipped with an observation window assembly 16. This assembly includes an observation through-hole in the sealing cover 8, a transparent window (such as tempered glass or polycarbonate) embedded and sealed within the through-hole, and a clamping ring for securing the transparent window. The position of the observation through-hole corresponds to the position of one or more heat dissipation branches 6 below. Through this window, the flow status of the coolant within the branch can be directly observed, for example, checking for air bubbles or obstructed flow. To achieve quantitative monitoring of heat dissipation performance, refer to... Figure 2 The substrate body 7 also has multiple temperature-sensing blind holes 17 inside. Each temperature-sensing blind hole 17 is drilled from the side or bottom of the substrate body 7, and its bottom is very close to the side wall of a certain heat dissipation branch 6, but does not penetrate it. The size of these blind holes matches the probe of a standard temperature sensor, so that the probe of the temperature sensor can be inserted into them, thereby accurately monitoring the real-time temperature of different heat dissipation branch areas.

[0025] The working process of the heat dissipation water circuit structure for a laser projector according to this utility model is as follows: The coolant in the external cooling circulation system is driven by a water pump and enters the inlet port 14 through an external pipeline, and then flows into the main inlet pipe 4 inside the heat dissipation base plate 1.

[0026] Within the main inlet pipe 4, the coolant is distributed to multiple parallel inlets, each corresponding to a heat dissipation branch 6 and a flow regulation mechanism 3. At this point, the operator can independently adjust each flow regulation mechanism 3 based on the actual heat dissipation requirements of each heat-generating area or based on the temperature data fed back from the temperature sensing blind hole 17.

[0027] During adjustment, the operator rotates a specific drive knob 12. The rotational movement of the drive knob 12 is transmitted to the flow regulating valve core 10 via the drive rod 11. Since the flow regulating valve core 10 and the valve seat 9 are threaded together, the flow regulating valve core 10 moves forward or backward along its axis while rotating. When the flow regulating valve core 10 moves forward, its conical front end gradually approaches and closes the inlet of the heat dissipation branch 6, reducing the flow cross-section and thus decreasing the flow rate of coolant flowing into that branch; conversely, when the flow regulating valve core 10 moves backward, the flow cross-section increases, and the flow rate increases accordingly. By referring to the scale markings on the drive knob 12, the flow rate of each branch can be precisely and repeatably set.

[0028] The coolant, with its precisely allocated flow rate, flows into its respective heat dissipation branch 6. During its flow through the heat dissipation branch 6, the coolant undergoes thorough heat exchange with the channel wall, absorbing and carrying away the heat generated by the heat-generating components in contact with the bottom of the heat dissipation substrate 1.

[0029] The coolant, whose temperature rises after absorbing heat, flows from the outlets of each heat dissipation branch 6 into the return manifold 5.

[0030] Finally, all the coolant collected in the return manifold 5 flows out of the heat sink 1 through the outlet port 15 and returns to the external cooling circulation system for cooling, completing one heat dissipation cycle.

[0031] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. For those skilled in the art, several modifications and improvements can be made without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A heat dissipation water circuit structure for a laser projector, characterized in that: It includes a heat dissipation substrate (1), a manifold mechanism (2), and a flow regulation mechanism (3), wherein: The liquid distribution manifold mechanism (2) is integrated inside the heat dissipation substrate (1). It includes an inlet manifold (4), a return manifold (5), and multiple heat dissipation branches (6). The inlet manifold (4) and the return manifold (5) are arranged parallel to each other inside the heat dissipation substrate (1). The two ends of the multiple heat dissipation branches (6) are respectively connected to the side walls of the inlet manifold (4) and the return manifold (5). The flow regulating mechanism (3) is provided at the connection between each heat dissipation branch (6) and the liquid inlet main pipe (4). The flow regulating mechanism (3) has an adjustable flow cross section.

2. The heat dissipation water circuit structure for a laser projector according to claim 1, characterized in that: The heat dissipation substrate (1) includes a substrate body (7) and a sealing cover plate (8). The liquid inlet manifold (4), the liquid return manifold (5) and the multiple heat dissipation branches (6) are all grooves opened on the top surface of the substrate body (7). The sealing cover plate (8) is fixed to the top surface of the substrate body (7). A sealing gasket is provided between the bottom surface of the sealing cover plate (8) and the top surface of the substrate body (7). The sealing cover plate (8) seals the groove.

3. The heat dissipation water circuit structure for a laser projector according to claim 2, characterized in that: Each of the flow regulating mechanisms (3) includes a valve seat (9), a flow regulating valve core (10), and a drive rod (11). The valve seat (9) is formed on the substrate body (7) and located at the inlet of the heat dissipation branch (6). The flow regulating valve core (10) is threadedly engaged with the valve seat (9). One end of the drive rod (11) is fixedly connected to the flow regulating valve core (10), and the other end of the drive rod (11) extends to the outside of the heat dissipation substrate (1).

4. The heat dissipation water channel structure for a laser projector according to claim 3, characterized in that: Each of the flow regulating mechanisms (3) further includes a drive knob (12) and a positioning sleeve (13). The drive knob (12) is fixed to one end of the drive rod (11) away from the flow regulating valve core (10). The positioning sleeve (13) is fixed to the outer wall of the heat dissipation substrate (1) and the drive rod (11) passes through the inner hole of the positioning sleeve (13).

5. The heat dissipation water channel structure for a laser projector according to claim 4, characterized in that: A sealing ring assembly is provided between the outer wall of the drive rod (11) and the inner wall of the positioning sleeve (13), and a scale mark is provided on the outer peripheral wall of the drive knob (12).

6. The heat dissipation water circuit structure for a laser projector according to claim 1, characterized in that: The heat dissipation substrate (1) is fixedly provided with an inlet port (14) and an outlet port (15). The inner cavity of the inlet port (14) is connected to one end of the inlet manifold (4), and the inner cavity of the outlet port (15) is connected to one end of the return manifold (5).

7. The heat dissipation water channel structure for a laser projector according to claim 2, characterized in that: The top of the sealing cover (8) is provided with an observation window assembly (16). The observation window assembly (16) includes an observation through hole opened on the sealing cover (8), a transparent window fixed in the observation through hole, and a clamping ring. The clamping ring fixes the transparent window in the observation through hole. The position of the observation through hole corresponds to the position of any of the heat dissipation branches (6).

8. The heat dissipation water circuit structure for a laser projector according to claim 2, characterized in that: The substrate body (7) is also provided with a plurality of temperature measurement blind holes (17), and the bottom of each temperature measurement blind hole (17) is adjacent to the side wall of a heat dissipation branch (6).

9. The heat dissipation water circuit structure for a laser projector according to claim 2, characterized in that: The bottom of the substrate body (7) is integrally formed with a plurality of reinforcing ribs (18), which are distributed along the length or width direction of the substrate body (7).

10. The heat dissipation water circuit structure for a laser projector according to claim 1, characterized in that: The inner wall surface of the heat dissipation branch (6) is processed with a turbulence structure, which is a spiral groove or a staggered rib along the fluid flow direction.

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