Optical engine heat dissipation structure and projection optical engine

Abstract

The application relates to the field of projection technology, and provides a light machine heat dissipation structure and a projection light machine. The light machine heat dissipation structure comprises a shell and a plate body, a lens cavity is formed in the shell, a ventilation opening is arranged on the shell, the lens cavity is communicated with the outside through the ventilation opening, the plate body is detachably installed at the ventilation opening, a bending air channel is formed between the plate body and the shell, a first end of the bending air channel is communicated with the outside, and a second end of the bending air channel is communicated with the ventilation opening. Therefore, the application is beneficial to the exhaust of hot air flow, limits the entry of external impurities into the lens cavity, accelerates the dissipation of condensation on the lens surface, and improves the definition of a projection picture and the use experience of the equipment.

Description

Technical Field

[0001] This application relates to the field of projection technology, and in particular to a heat dissipation structure for an optical engine and a projection optical engine. Background Technology

[0002] In related technologies, the projection optical engine is the core of a projector's optical imaging, used to convert light emitted from a light source into a projectable image. During the operation of the projection optical engine, optical components and the lamp panel generate a large amount of heat, forming a hot airflow inside the engine. This hot airflow can leak to some extent and may enter the cavity area where the lens is located, causing the lens to fog up. To improve the lens fogging problem, perforations are usually set in the cavity area where the lens is located and a breathable membrane is sealed to allow air to pass through while preventing external impurities from entering. However, the airflow velocity inside the lens cavity is low, and the condensed condensation cannot dissipate quickly, resulting in a poor user experience. Utility Model Content

[0003] This application provides a heat dissipation structure for an optical engine and a projection optical engine, which can effectively improve the problem of condensation not dissipating quickly, thereby enhancing the user experience.

[0004] To achieve the above objectives, according to a first aspect of this application, a heat dissipation structure for a projection optical engine is provided, comprising:

[0005] The housing has a lens cavity inside, and the housing has a vent, through which the lens cavity communicates with the outside.

[0006] The plate is detachably mounted on the housing and located at the vent. A bent air passage is formed between the plate and the housing. The first end of the bent air passage is connected to the outside, and the second end of the bent air passage is connected to the vent.

[0007] Optionally, a plurality of protrusions are spaced apart on the surface of one of the plate and the housing, and a plurality of grooves are spaced apart on the surface of the other of the plate and the housing, wherein...

[0008] The protrusions correspond one-to-one with the grooves, and the bent air passages are formed between the protrusions and the grooves.

[0009] Optionally, the tortuous air passage includes at least a plurality of intersecting and interconnected concave air sections and convex air sections, wherein,

[0010] One of the concave air section or the convex air section is connected to the ventilation opening;

[0011] And / or, one of the concave air section or the convex air section is connected to the outside.

[0012] Optionally, the protrusion is configured as an annular body circumferentially surrounding the vent, and the groove is configured as an annular groove circumferentially surrounding the vent.

[0013] Optionally, one of the plate and the housing is provided with a limiting part, which is used to define the bend in the air passage between the plate and the housing.

[0014] Optionally, the limiting part includes a first limiting sub-part, which is located between the plate and the housing to define a communication gap between the tortuous air passage and the outside.

[0015] Optionally, the limiting portion includes a second limiting sub-portion, which is located between the protrusion and the groove to define the distance between them.

[0016] Optionally, the plate and the housing are detachably connected by a connector.

[0017] Optionally, the connector includes a first lug, a second lug, and a bolt, wherein,

[0018] The first lug is provided on the plate, and the second lug is provided on the shell. Both the first lug and the second lug have corresponding bolt holes, and the bolt threads pass through the bolt holes.

[0019] According to a second aspect of this application, a projection optical engine is provided, including a body and the aforementioned optical engine heat dissipation structure, wherein the optical engine heat dissipation structure is disposed on the body.

[0020] Optionally, the interior of the body is provided with a circulating air duct, which is separated from the lens cavity.

[0021] Optionally, the circulating air duct is connected to the lens cavity via a gas channel.

[0022] Optionally, the inner diameter of the gas channel is configured to be in the range of 0.4 mm to 0.6 mm.

[0023] In the optomechanical heat dissipation structure of this application embodiment, a vent is provided on the housing, and a plate is detachably installed at the vent, allowing the lens cavity to communicate with the outside. Simultaneously, a bent air passage is formed between the plate and the housing, with one end connected to the outside and the other end connected to the vent, creating a path for hot air to escape. Since the hot air within the lens cavity can naturally flow towards the cooler outside environment, it helps accelerate the dissipation of condensation on the lens surface, reducing fogging during initial startup. At the same time, the bent air passage structure can, to a certain extent, prevent external particles or dust from entering the lens cavity, thus balancing the dual requirements of heat dissipation efficiency and optical cleanliness, improving the stability and reliability of the equipment in different environments.

[0024] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0027] Figure 1 This is a schematic diagram of the optical engine heat dissipation structure and the projection optical engine provided in the exemplary embodiments of this application;

[0028] Figure 2 This is a partial schematic diagram of the optical engine heat dissipation structure after the hidden plate is provided in an exemplary embodiment of this application;

[0029] Figure 3 This is a partial cross-sectional view of the optomechanical heat dissipation structure provided in an exemplary embodiment of this application;

[0030] Figure 4 yes Figure 3 Enlarged view of part A in the image;

[0031] Figure 5 This is a cross-sectional view of the optical engine heat dissipation structure and projection optical engine provided in the exemplary embodiments of this application;

[0032] Figure 6 yes Figure 5 Enlarged view of part B in the image;

[0033] Figure 7 This is a partial schematic diagram of the optomechanical heat dissipation structure provided in an exemplary embodiment of this application;

[0034] Figure 8 This is a half-sectional view of the optical engine heat dissipation structure and projection optical engine provided in the exemplary embodiments of this application.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Housing; 11. Lens cavity; 12. Vent;

[0037] 2. Plate body;

[0038] 3. Bent airway; 31. Concave air section; 32. Convex air section;

[0039] 4. Protrusions;

[0040] 5. Groove;

[0041] 6. Limiting part; 61. First limiting sub-part; 62. Second limiting sub-part;

[0042] 7. Connector; 71. First lug; 72. Second lug; 73. Bolt;

[0043] 8. Body; 81. Circulating air duct; 82. Gas passage. Detailed Implementation

[0044] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0045] In the existing DF3 optical engine structure, the light-emitting display components (including the reflector, LCD screen, front Fresnel lens, rear Fresnel lens, and heat-insulating glass) generate a significant amount of heat during operation. Simultaneously, the optical engine internally uses an internal circulation channel to guide hot airflow for heat dissipation. However, in actual operation, this hot airflow leaks to some extent, potentially entering the cavity area where the lens is located.

[0046] Since the lens assembly is typically at a low temperature, when hot air enters the lens cavity 11, condensation easily forms on the lens surface, causing the lens to fog up, especially during the initial power-on period of the projection device. Specifically, after the device is powered on, the light-emitting display component heats up rapidly, the internal fan starts, and hot air flows and partially enters the lens cavity 11. Fog can usually form on the lens within about 2 minutes, directly affecting the clarity of the projected image.

[0047] To alleviate the aforementioned technical problems, a circular through-hole is provided on the side wall of the lens cavity 11, and a breathable membrane is sealed at the through-hole to allow airflow to escape from the cavity. However, due to the low airflow velocity inside the lens cavity 11, the condensed condensation cannot dissipate quickly, resulting in a typical time of 18 to 20 minutes for the condensation on the lens surface to be completely removed. In other words, in this type of enclosed projection device, there is a long waiting time from power-on to the projection image returning to a clear and stable state, which seriously affects the user experience.

[0048] In this embodiment, the structure of the through-hole encapsulated breathable membrane is changed to a direct ventilation opening 12, and a plate 2 is detachably installed on the ventilation opening 12. A bent air channel 3 is formed between the plate 2 and the housing 1. The first end of the bent air channel 3 is connected to the outside, and the second end is connected to the ventilation opening 12. With this direct connection, since the lens cavity 11 contains hot air and the outside contains cold air, the hot air will flow to the cold air side, which will make heat dissipation faster and the condensation on the lens surface can be quickly dissipated. Moreover, the bent air channel 3 can prevent impurities from entering the lens cavity 11, which not only makes the condensation dissipate faster, but also effectively prevents external impurities from entering the lens cavity 11, thereby improving the user experience.

[0049] Specifically, please refer to Figures 1 to 8 This application provides a heat dissipation structure for an optical engine, applied to a projection optical engine. The heat dissipation structure includes a housing 1, a vent 12, and a plate 2. The housing 1 contains a lens cavity 11 for mounting the lens assembly of the projection optical engine, which typically maintains a relatively low temperature during operation. The housing 1 has a vent 12 that allows the lens cavity 11 to exchange gases with the external environment.

[0050] In some embodiments, to regulate the gas flow between the vent 12 and the outside environment, prevent external impurities or dust particles from directly entering the lens cavity 11, and accelerate the dissipation of condensation on the lens surface, a plate 2 is detachably installed at the vent 12 of the housing 1. The plate 2 and the housing 1 cooperate to form a bent air passage 3, which can block external impurities to a certain extent during gas flow.

[0051] It is understandable that the path of the bent air passage 3 extends non-linearly on the plane. Specifically, one end (i.e., the first end) of the bent air passage 3 is connected to the external air environment of the device, and the other end (i.e., the second end) is connected to the vent 12 on the housing 1, thereby realizing a gas exchange channel between the external cold air and the hot gas inside the lens cavity 11.

[0052] Exemplarily, the bent air duct 3 is preferably arranged as a zigzag or broken-line air duct, and its internal cross-section can be in the shape of a "ji" character, an arc, or other non-linear shapes suitable for forming, so as to improve the guiding ability of the air flow path and achieve inertial blocking of larger particulate impurities when the air flow passes through. At the same time, due to the physical properties of hot gas, such as natural upward movement and cooling and diffusing, when the device is powered on, the hot air flow in the lens cavity 11 is affected by the relatively low-temperature air outside, and heat can be released from the lens cavity 11 to the outside through the bent air duct 3, reducing the temperature and humidity levels in the cavity. While the vent 12 is connected to the outside, due to the bent structure of the bent air duct 3, compared with the traditional straight-through hole structure, it helps to extend the path of the outside gas entering the lens cavity 11 to a certain extent, thereby reducing the possibility of external impurities entering the lens cavity 11, and having a good protective effect.

[0053] In some embodiments, in combination with Figures 1 to 3 , the plate body 2 is detachably arranged on the housing 1. Exemplarily, the plate body 2 can be fixedly installed by means of buckles, screws, slots, etc., which is convenient for users to clean or replace later; this structural form not only ensures the continuity of air flow guidance but also improves the convenience of later maintenance. Compared with the prior art method of using a circular through-hole and encapsulating a breathable membrane, in this embodiment, the vent 12 and the plate body 2 are directly provided to form the bent air duct 3, saving the material and encapsulation costs of the breathable membrane, and avoiding the problems of slow air permeability, easy heat aging, or blockage of the breathable membrane. In the initial stage of the operation of the lens assembly, the hot air flow can be discharged from the lens cavity 11 more quickly, which helps to accelerate the dissipation of condensation on the lens surface, so that the projection image can be restored clearly in a shorter time, improving the user's boot waiting experience.

[0054] In summary, through the cooperative setting among the housing 1, the vent 12, the plate body 2, and the bent air duct 3 formed between the plate body 2 and the housing 1, the heat exchange efficiency in the lens cavity 11 can be improved to a certain extent, the dissipation speed of condensation can be accelerated, and at the same time, the risk of external impurities entering the lens cavity 11 can be reduced, having good practical value and promotion prospects. It can be understood that the "bent air duct 3" in this structure refers to the non-linear air flow channel formed between the plate body 2 and the housing 1, which is not limited to a specific shape, but emphasizes that it has a certain zigzag or bending change in the air flow path to achieve the composite functions of hot gas discharge and impurity blocking.

[0055] In some embodiments, in combination with Figure 3 、 Figure 4To achieve the structural construction and functional optimization of the aforementioned bent air passage 3, the optomechanical heat dissipation structure is provided with multiple protrusions 4 and multiple grooves 5 to form a stable airflow channel between the plate 2 and the shell 1. Specifically, multiple protrusions 4 are spaced apart on the surface of either the plate 2 or the shell 1, while corresponding grooves 5 are spaced apart on the surface of the other. The multiple protrusions 4 and grooves 5 form the bent air passage 3 through the matching of their positions and shapes.

[0056] It is understood that the "protrusion" here refers to the part that protrudes outward relative to the reference plane of the surface, and can be semi-circular, trapezoidal, or other suitable geometric shapes; while the "groove" refers to the matching recessed part, used to accommodate a part of the protrusion 4, and together they construct the bent air passage 3. Through this one-to-one convex-concave fit, during the process of installing the plate 2 onto the housing 1, a defined non-linear path is formed between the protrusion 4 and the groove 5, thereby making the airflow path bend. This structural design is beneficial to enhance the morphological stability of the bent air passage 3, preventing deformation of the bent air passage 3 due to airflow pressure or external force impact, and at the same time, the structural guidance increases the degree of airflow disturbance in the path, thereby helping to accelerate the dissipation of condensation; in addition, this structural fit also provides convenience for subsequent maintenance or replacement, facilitates modular disassembly and assembly, and enhances the maintainability and durability of the overall system. Through the above construction method, the forming accuracy and sealing performance of the heat dissipation channel of the lens cavity 11 can be improved to a certain extent, while optimizing the hot airflow guide path and improving the overall performance of the equipment while maintaining the function of isolating external impurities.

[0057] In some embodiments, combined with Figure 4 , Figure 5 as well as Figure 6 To enhance the function of the bent air passage 3 in blocking external impurities from entering the lens cavity 11 and to optimize the disturbance effect of the airflow path, the bent air passage 3 includes at least multiple intersecting and interconnected concave air sections 31 and convex air sections 32. It can be understood that a "concave air section" refers to a channel portion that is concave relative to the overall layout of the bent air passage 3, and its formation location is usually located in the lower region of the area where the protrusion 4 and the groove 5 meet; while a "convex air section" refers to a relatively higher channel section located between the two adjacent lower regions, and this section of the path is distributed in a convex state between the plate 2 and the shell 1. Multiple concave air sections 31 and convex air sections 32 are arranged intersectingly and connected at adjacent locations, forming a complex but continuous airflow guiding path.

[0058] This staggered air section structure has multiple functions: First, when the airflow passes through the continuous convex and concave structure, its path will change frequently, increasing the degree of airflow disturbance and helping the heat to diffuse rapidly; Second, the "bends" in this structure can form a physical barrier to a certain extent, so that particulate impurities carried by the airflow are intercepted due to kinetic energy loss or collision deviation during the passage of the air passage, reducing the possibility of them entering the lens cavity 11.

[0059] Furthermore, at least one of the aforementioned concave air sections 31 and convex air sections 32 is connected to the vent 12 to guide gas from the lens cavity 11 to the bend air passage 3; while the other is connected to the outside, enabling the introduction of external cold air or the exhaust of internal hot air, thereby completing the gas exchange cycle. Therefore, this staggered bend air passage 3 not only has heat exchange and airflow regulation functions, but also plays a positive role in impurity isolation, improving the overall optical engine system's anti-pollution capability and helping to maintain the long-term stable operation of the projection equipment and image clarity.

[0060] It is understood that the “interlaced connection” in this embodiment refers to the nonlinearity and non-coplanarity of the upper convex air section 32 and the lower concave air section 31 in space, but functional connection, forming a closed but flow-guiding path structure, rather than simply referring to the simple high and low distribution in structure.

[0061] In some implementations, combined with Figure 2 and Figure 6 To optimize the structural design of the aforementioned bent air passage 3 and improve processing convenience and overall airflow, the protrusion 4 is specifically configured as a ring-shaped body circumferentially surrounding the vent 12, and the groove 5 is configured as a matching ring-shaped groove, meaning that both are structurally arranged in a closed ring shape. Furthermore, there are multiple protrusions 4 and grooves 5. Therefore, after the plate 2 is applied to the vent 12, multiple ring-shaped grooves or rings of progressively larger size will be formed on the outer periphery of the vent 12 from the inside out, so that the bent air passage 3 exists in the outer periphery of the vent 12, improving the ventilation effect of the bent air passage 3.

[0062] It is understandable that the annular body refers to the protrusion 4 extending in a circular trajectory around the vent 12 on the plane, forming a continuous circumferential raised structure; while the annular groove refers to a groove-shaped recess on its mating surface that corresponds to the shape of the annular body, used to fit and engage with the protrusion 4. Through the above structural design, during the installation of the plate 2 onto the housing 1, the annular protrusion 4 and the annular groove 5 form a bent air passage 3 with a consistent cross-sectional shape in all cross-sectional directions. In other words, regardless of which direction the cross-section is viewed from at the junction of the plate 2 and the housing 1, an airflow channel with a consistent structural shape and uniform size can be obtained. This uniform structure facilitates mold processing and mass production, significantly improving manufacturing efficiency and consistency.

[0063] Furthermore, since the annular structure is evenly distributed around the vent 12 in the circumferential direction, the airflow can be guided and dispersed from multiple directions simultaneously when passing through the bend air passage 3, which significantly improves the gas exchange capacity of the overall vent 12. This helps the hot air to be released from the lens cavity 11 more quickly, shortens the time window for the hot air to accumulate and form condensation, and indirectly improves the dissipation efficiency of condensation on the lens surface.

[0064] Furthermore, this annular arrangement also increases the effective volume of the bend in the air duct 3, providing more space for the passage and diffusion of hot air, reducing airflow resistance, and improving ventilation efficiency. Compared with the traditional segmented or unidirectional air duct method, the annular air duct has significant advantages in terms of structural continuity and airflow balance, which can alleviate heat accumulation to a certain extent and effectively enhance ventilation without increasing the overall structural complexity.

[0065] It is worth noting that "circumferential surrounding" here refers to the structure extending along the direction surrounding the central axis of the vent 12. It does not specifically refer to a complete 360° closed loop shape, but can also be a ring structure formed by the combination of multiple arc segments. Its core purpose is to achieve complete coverage of the air duct structure in all directions around the vent 12, thereby improving the overall heat dissipation performance and structural stability.

[0066] In summary, by configuring the protrusion 4 and the groove 5 as a circumferential ring structure, it is possible to achieve both standardized processing and improved ventilation efficiency, and it also helps with system-level thermal management design, which has high practical value and promotion potential.

[0067] In some embodiments, in order to further optimize the forming stability of the bent air duct 3 and effectively avoid the blockage of the air duct structure due to assembly errors during the structural assembly process, a limiting part 6 for limiting the installation position of the plate 2 is provided in the optomechanical heat dissipation structure.

[0068] Specifically, such as Figure 5 , Figure 6 As shown, the limiting part 6 is provided on the structural surface of either the plate 2 or the housing 1, and is used to constrain the relative position of the plate 2 when it is installed on the housing 1, thereby defining the required space of the bent air passage 3 between the plate 2 and the housing 1.

[0069] It is understandable that a "limiting part" refers to a structural component used to achieve relative positioning. It can take various forms such as protrusions, limiting ribs, slots, or positioning holes, and is designed according to the specific shape of the shell 1 or plate 2. With the setting of the limiting part 6, when the plate 2 is installed into the shell 1, the limiting part 6 can prevent the plate 2 from shifting due to human error, vibration, or assembly force offset to a certain extent, thereby avoiding the problem of the protrusion 4 fitting against the inner wall of the groove 5 due to installation deviation, thus blocking the bend in the air passage 3.

[0070] The configuration of the limiting part 6 not only guides the effective formation of the bent air passage 3, but also maintains the stability of its relative position during repeated disassembly and installation of the plate 2, thereby improving the assembly consistency and reliability of the entire heat dissipation structure.

[0071] Furthermore, the setting of the limiting part 6 helps to clearly define the size limit of the bent air passage 3, thereby giving the bent air passage 3 greater controllability during the structural design stage and avoiding the risk of performance instability caused by the size of the bent air passage 3 changing with the installation process. Especially in application scenarios where the internal heat conduction and dissipation of the optical engine have high structural requirements, the presence of the limiting part 6 is of positive significance in maintaining a stable airflow path between the lens cavity 11 and the outside, which can improve the efficiency of heat dissipation and reduce the probability of condensation to a certain extent. In summary, by setting the limiting part 6 to limit the bent air passage 3 between the plate 2 and the shell 1, not only is the accuracy of structural assembly improved, but it is also beneficial to the stability and optimization of the performance of the entire optical engine heat dissipation system.

[0072] In some embodiments, in order to further improve the positioning accuracy of the plate 2 during the installation process and to stably form the required bent air passage 3 structure, a first limiting sub-part 61 and a second limiting sub-part 62 are specifically provided in the limiting part 6. The two sub-parts limit the plate 2 from different directions, thereby realizing multi-dimensional control of the fit relationship between the plate 2 and the shell 1.

[0073] Specifically, refer to Figure 5 , Figure 6 The first limiting sub-part 61 is disposed on either the plate 2 or the housing 1. When the plate 2 is installed in place, the first limiting sub-part 61 is located between the plate 2 and the housing 1 to restrict the movement of the plate 2 in the radial direction. Its main function is to limit the communication gap between the bent air passage 3 and the outside world. That is, the first limiting sub-part 61, through the set geometry or height, makes a certain gap space between the inlet of the bent air passage 3 and the external environment, thereby ensuring that the airflow can pass smoothly through the bent air passage 3 and avoiding the inlet of the bent air passage 3 being blocked due to the offset of the installation position.

[0074] On the other hand, the second limiting part 62 is located between the protrusion 4 and the groove 5, and is used to control the distance between them in the axial direction. That is, the second limiting part 62 limits the depth of the protrusion 4 embedded in the groove 5, so as to avoid excessive fitting due to excessive installation force, thereby compressing the space of the bent air passage 3 or even forming airflow blockage. This structure not only maintains the stable dimensions of the bent air passage 3 in the longitudinal direction, which is beneficial to the smooth flow of airflow, but also avoids the thermal bridging effect caused by the tight fit of the structure from interfering with the airflow path.

[0075] It is understandable that the combination of the first limiting sub-part 61 and the second limiting sub-part 62 constitutes a multi-dimensional limiting system. The first limiting sub-part 61 primarily acts on the opening end of the bent air passage 3 (i.e., the part closest to the outside), while the second limiting sub-part 62 primarily acts on the middle part of the bent air passage 3 (i.e., the mating part between the protrusion 4 and the groove 5). Through the combined action of these two limiting methods, a self-aligning guiding effect is achieved during the installation of the plate 2, allowing the plate 2 to naturally slide into the predetermined installation position. This reduces human error and helps improve assembly efficiency and consistency. It is worth noting that the "connecting gap" is not equivalent to a completely open channel, but rather refers to a space reserved in the structural design that has ventilation capabilities. Its size can be set according to specific heat dissipation requirements or dustproof performance.

[0076] In summary, by providing a first limiting sub-part 61 and a second limiting sub-part 62 in the limiting part 6, the reliability and consistency of the air passage formation can be improved to a certain extent, thereby enhancing the heat exchange efficiency between the optical-mechanical lens cavity 11 and the outside world and alleviating the lens condensation problem.

[0077] In some embodiments, in order to realize a detachable connection structure between the plate 2 and the housing 1, so as to facilitate later maintenance, cleaning or replacement of the plate 2, and further improve the operability and structural flexibility of the equipment, a connector 7 is provided in the optomechanical heat dissipation structure to fix the plate 2 and the housing 1 in a detachable manner.

[0078] Specifically, combined Figure 1 , Figure 7 The connector 7 includes a first lug 71 on the plate 2, a second lug 72 on the housing 1, and a bolt 73 for connecting the two. The first lug 71 and the second lug 72 are respectively disposed on the opposite surfaces of the plate 2 and the housing 1, and each has a bolt hole 73. The size, shape, and position of the bolt holes 73 are precisely designed to achieve quick positioning and stable fixing during installation. During installation, the operator only needs to pass the threaded portion of the bolt 73 through the bolt holes 73 on the first lug 71 and the second lug 72 in sequence and tighten it appropriately to complete the assembly connection between the plate 2 and the housing 1.

[0079] This connection structure offers excellent reusability, making it particularly suitable for the interiors of projection optical engines with limited space and frequent maintenance requirements. By employing a lug-bolt 73 connection, compared to traditional bonding or welding methods, the assembly process is simplified to some extent. It also facilitates modular replacement without compromising overall structural stability, improving maintainability and lifespan. It is worth noting that "detachable connection" in this application refers to a connection method achieved through connector 7 that allows for assembly and disassembly without damaging the main structure. The "lug" refers to a local structure extending outward from the surface of plate 2 or shell 1, used to position the bolt 73 holes and provide mounting support. The "bolt" is a standard fastener with a threaded structure, possessing good tensile and shear strength, suitable for stable positioning.

[0080] Furthermore, the first lug 71 and the second lug 72, located on the plate 2 and the housing 1, can be symmetrically arranged according to the overall layout of the equipment. Multiple connection points further disperse installation stress, preventing deformation of the plate 2 or changes in the dimensions of the bent air duct 3 due to excessive local tightening. In practical use, this connection structure not only facilitates assembly and disassembly without complex tools but also improves positioning accuracy during assembly, thereby ensuring the structural integrity and heat dissipation of the bent air duct 3 to a certain extent. In summary, by providing the connector 7, including the first lug 71, the second lug 72, and the bolt 73, a stable and detachable connection between the plate 2 and the housing 1 can be effectively achieved, which is beneficial for improving the maintenance convenience of the overall structure and the consistency of the air duct structure.

[0081] According to a second aspect of this application, a projection optical engine is provided, comprising a body 8 and the aforementioned optical engine heat dissipation structure. This projection optical engine possesses all the beneficial effects of the aforementioned optical engine heat dissipation structure, which will not be elaborated further herein.

[0082] In some embodiments, the projection optical engine includes an LCD projector (liquid crystal projector), a DLP projector (digital light processing projector), an LCoS projector (liquid crystal on silicon projector), etc.

[0083] In some embodiments, combined with Figure 1 , Figure 8 The body 8 has a circulating air duct 81 inside, which is separated from the lens cavity 11. Exemplarily, the circulating air duct 81 and the lens cavity 11 are connected by a gas channel 82.

[0084] It is understandable that the circulating air duct 81 and the lens cavity 11 are structurally separated, meaning they are in independent flow channels under normal conditions, but a gas channel 82 is reserved between them to achieve a certain degree of connection. This gas channel 82 is structurally located at the tail end or transition zone of the circulating air duct 81, and can utilize the dynamic pressure of the circulating air to guide a portion of the airflow into the lens cavity 11 at a specific time (such as the initial startup of the equipment), and then discharge it to the external environment through the ventilation port 12 of the lens cavity 11. In this way, while ensuring that the lens cavity 11 is not directly impacted by high-temperature airflow, it can guide a moderately warm circulating airflow into the lens cavity 11 to a certain extent. By increasing the airflow inside the lens cavity 11, the evaporation rate of condensation formed due to temperature differences is accelerated, thereby shortening the time required for the lens surface to return to a clear state.

[0085] In addition, in this application, "circulating air duct" refers to a closed or semi-closed airflow path formed inside the body 8 for cooling the light source assembly, liquid crystal display assembly or other heat-generating elements; "lens cavity" refers to a closed or semi-closed space that accommodates the optical lens assembly; "gas channel" is a fluid communication passage that runs through the two above, and its size, position and flow cross-section have been optimized by airflow simulation and thermal management design to maintain a suitable flow rate and avoid disturbance or contamination of the lens assembly due to excessive airflow.

[0086] In summary, by integrating the optical engine heat dissipation structure with the body 8 structure, which has a circulation air duct 81 and a gas channel 82, the projection optical engine is constructed. On the one hand, the overall heat dissipation capacity of the body 8 is enhanced, and on the other hand, the condensation problem in the lens cavity 11 area is improved. This helps to improve the device's power-on response efficiency and the stability of image clarity, and optimize the user experience.

[0087] In some embodiments, the inner diameter of the gas channel 82 is configured to be in the range of 0.4 mm to 0.6 mm. Further, the inner diameter of the gas channel 82 is 0.5 mm.

[0088] Understandably, this design considers the balance between airflow and channel pressure drop. On one hand, the diameter is sufficient to guide a small amount of airflow into the lens cavity 11, creating localized airflow. This helps dilute the humidity and quickly equalize the temperature inside the lens cavity 11, further accelerating the dissipation rate of fog or condensation. On the other hand, keeping the inner diameter within a small range also helps to suppress dust and external particles from entering the lens cavity 11 with the airflow, thus reducing the potential impact on lens cleanliness. The statement that "the inner diameter of the gas channel 82 is 0.5mm" refers to the diameter when its cross-section is approximately circular. If it is not circular, the equivalent flow diameter of an approximate circle is used. This design helps to improve the overall anti-fogging performance of the camera under conditions of rapid temperature changes while ensuring the environmental stability of the lens cavity 11.

[0089] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0090] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0091] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0092] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A heat dissipation structure for an optomechanical system, characterized in that, include: The housing (1) has a lens cavity (11) inside, and the housing (1) has a vent (12) and the lens cavity (11) is connected to the outside through the vent (12); The plate (2) is detachably mounted on the housing (1) and located at the vent (12). A bent air passage (3) is formed between the plate (2) and the housing (1). The first end of the bent air passage (3) is connected to the outside, and the second end of the bent air passage (3) is connected to the vent (12).

2. The optomechanical heat dissipation structure according to claim 1, characterized in that, The surface of one of the plate (2) and the shell (1) is provided with a plurality of protrusions (4) spaced apart, and the surface of the other of the plate (2) and the shell (1) is provided with a plurality of grooves (5) spaced apart, wherein, The protrusions (4) correspond one-to-one with the grooves (5), and the bent air passages (3) are formed between the protrusions (4) and the grooves (5).

3. The optomechanical heat dissipation structure according to claim 2, characterized in that, The tortuous airway (3) includes at least a plurality of intersecting and interconnected concave air sections (31) and convex air sections (32), wherein, One of the concave air section (31) or the convex air section (32) is connected to the vent (12); And / or, one of the concave air section (31) or the convex air section (32) is connected to the outside.

4. The optomechanical heat dissipation structure according to claim 2, characterized in that, The protrusion (4) is configured as an annular body circumferentially surrounding the vent (12), and the groove (5) is configured as an annular groove circumferentially surrounding the vent (12).

5. The optomechanical heat dissipation structure according to claim 2, characterized in that, One of the plate (2) and the shell (1) is provided with a limiting part (6), which is used to limit the bend air passage (3) between the plate (2) and the shell (1).

6. The optomechanical heat dissipation structure according to claim 5, characterized in that, The limiting part (6) includes a first limiting sub-part (61), which is located between the plate (2) and the shell (1) to define the communication gap between the bent air passage (3) and the outside.

7. The optomechanical heat dissipation structure according to claim 5, characterized in that, The limiting part (6) includes a second limiting sub-part (62), which is located between the protrusion (4) and the groove (5) to define the distance between them.

8. The optomechanical heat dissipation structure according to any one of claims 1 to 7, characterized in that, The plate (2) and the shell (1) are detachably connected by a connector (7).

9. The optomechanical heat dissipation structure according to claim 8, characterized in that, The connector (7) includes a first lug (71), a second lug (72), and a bolt (73), wherein, The first lug (71) is provided on the plate (2), and the second lug (72) is provided on the shell (1). Both the first lug (71) and the second lug (72) are provided with bolt (73) holes, and the bolt (73) is threaded through the bolt (73) hole.

10. A projection optical engine, characterized in that, It includes a body (8) and the optical engine heat dissipation structure according to any one of claims 1-9, wherein the optical engine heat dissipation structure is disposed on the body (8).

11. The projection optical engine according to claim 10, characterized in that, The body (8) has a circulating air duct (81) inside, which is separated from the lens cavity (11).

12. The projection optical engine according to claim 11, characterized in that, The circulating air duct (81) is connected to the lens cavity (11) through a gas channel (82).

13. The projection optical engine according to claim 12, characterized in that, The inner diameter of the gas passage (82) is configured to be in the range of 0.4 mm to 0.6 mm.

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