Projection light machine and projection equipment

Abstract

The utility model relates to the technical field of projection, and provides a projection light machine and projection equipment. The projection light machine comprises an optical element, a lamp panel, a main body piece and a fan. A first air channel and a second air channel are formed in the main body piece. The first air duct is in heat-conducting connection with the second air duct. Wherein the optical element and the lamp panel are both connected to the main body piece. The optical element is located in the first air channel. The lamp panel is in heat-conducting connection with the second air duct. The fan is connected with the main body piece. And a flexible connecting piece is arranged between the fan and the main body piece. The fan is used for forming airflow in the first air duct and / or the second air duct. Therefore, the noise generated during the operation of the projection light machine is reduced, and the use effect of a user is improved.

Description

Technical Field

[0001] This application relates to the field of projection technology, and in particular to a projection optical engine and projection device. 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, the optical components and lamp panel generate a large amount of heat. If this heat is not dissipated in time, it may damage the optical components or lamp panel, affecting the projector's lifespan. To improve the heat dissipation of the optical components and lamp panel, a heat dissipation structure is usually installed inside the projection optical engine. However, the fans in the heat dissipation structure are prone to vibration during operation, resulting in noise and a poor user experience. Utility Model Content

[0003] This application provides a projection optical engine and projection device, which can improve the vibration and collision between the fan and the main body through a flexible connection, thereby reducing the noise generated during the operation of the fan and improving the user experience.

[0004] To achieve the above objectives, according to a first aspect of this application, a projection optical engine is provided, comprising optical elements and a lamp panel, the projection optical engine further comprising:

[0005] The main body has a first air duct and a second air duct inside, and the first air duct and the second air duct are thermally connected. The optical element and the lamp board are both connected to the main body. The optical element is located in the first air duct, and the lamp board is thermally connected to the second air duct.

[0006] A fan is connected to the main body, and a flexible connector is provided between the fan and the main body. The fan is used to form airflow in the first air duct and / or the second air duct.

[0007] Optionally, the main component includes:

[0008] The housing has a first heat dissipation channel inside, which forms at least a portion of the first air duct. The optical element is connected to the housing and is located within the first heat dissipation channel.

[0009] Optionally, the main body component further includes:

[0010] A first radiator is connected to the housing, and a second heat dissipation channel is formed inside the first radiator. The second heat dissipation channel communicates with the first heat dissipation channel to form at least a portion of the first air duct. The first radiator is used to conduct heat in the first air duct to the second air duct or release it to the ambient space.

[0011] Optionally, the main body component further includes:

[0012] An air guide shroud is connected to the housing, and an air guide channel is formed inside the air guide shroud. The first heat dissipation channel, the second heat dissipation channel and the air guide channel are connected to form the first air duct.

[0013] Optionally, the fan includes:

[0014] A first fan is connected to the housing and located within the first air duct, with the air outlet of the first fan facing the air guide shroud.

[0015] The flexible connector includes:

[0016] A first flexible part is disposed between the first fan and the air guide cover, and the first flexible part is arranged around the air outlet of the first fan.

[0017] Optionally, the air inlet of the first fan faces the first heat sink, and the flexible connector further includes:

[0018] The second flexible part is disposed between the first fan and the first heat sink, and the second flexible part is disposed close to the air inlet of the first fan.

[0019] Optionally, the housing is provided with a snap-fit ​​post, and the first fan is provided with a snap-fit ​​hole, and the snap-fit ​​post is snapped into the snap-fit ​​hole.

[0020] Optionally, the optical element includes:

[0021] A first Fresnel lens and a second Fresnel lens are disposed at an interval within the housing, defining the first heat dissipation channel within the housing; and / or

[0022] An imaging screen is disposed within the housing; and / or

[0023] Insulated glass is installed inside the housing.

[0024] Optionally, a third heat dissipation channel is further formed within the first heat sink, the third heat dissipation channel forming at least a portion of the second air duct, wherein the third heat dissipation channel is thermally connected to the second heat dissipation channel and is used to conduct heat in the first air duct to the second air duct.

[0025] Optionally, the main body component further includes:

[0026] The bottom shell is connected to the housing and the first heat sink. A fourth heat dissipation channel is formed inside the bottom shell. The fourth heat dissipation channel communicates with the third heat dissipation channel to form at least a portion of the second air duct.

[0027] Optionally, the main body component further includes:

[0028] The second radiator is connected to the housing and the bottom shell. A fifth heat dissipation channel is formed inside the second radiator. The third heat dissipation channel, the fourth heat dissipation channel and the fifth heat dissipation channel are connected to form the second air duct.

[0029] The lamp panel is thermally connected to the second heat sink, which is used to release heat from the second air duct into the ambient space.

[0030] Optionally, the end of the third heat dissipation channel away from the fourth heat dissipation channel forms a heat dissipation air inlet on the surface of the first heat sink, and the end of the fifth heat dissipation channel away from the fourth heat dissipation channel forms a heat dissipation air outlet on the surface of the second heat sink.

[0031] Optionally, the fan further includes:

[0032] The second fan is connected to the bottom shell and is located within the fourth heat dissipation channel;

[0033] The flexible connector further includes:

[0034] The third flexible part is connected between the second fan and the bottom shell.

[0035] Optionally, the second fan is fixed to the bottom shell by fasteners, and the third flexible part is sleeved on the fasteners.

[0036] Optionally, the fan further includes:

[0037] The second fan is connected to the bottom shell and is located in the fourth heat dissipation channel, with the air outlet of the second fan facing the second heat sink.

[0038] The flexible connector further includes:

[0039] A fourth flexible part is disposed between the second fan and the second heat sink, and the fourth flexible part is arranged around the air outlet of the second fan.

[0040] Optionally, the first radiator is provided with a heat-conducting plate to divide the internal space of the first radiator into the second heat dissipation channel and the third heat dissipation channel.

[0041] Optionally, a first fin group and a second fin group are respectively connected to opposite sides of the heat-conducting plate, the first fin group being located in the second heat dissipation channel and the second fin group being located in the third heat dissipation channel.

[0042] Optionally, the first fin group includes at least two first fins spaced apart along a first direction, wherein the distance between each pair of adjacent first fins is D1, satisfying: 2.5 mm ≤ D1 ≤ 3.5 mm.

[0043] Optionally, the thickness of the first fin is defined along the first direction, and the thickness of the first fin is D2, satisfying: 0.8 mm ≤ D2 ≤ 1.2 mm.

[0044] Optionally, the height of the first fin is defined along the second direction, and the height of the first fin is H1, satisfying: 10 mm ≤ H1 ≤ 20 mm, wherein the second direction is set at an angle to the first direction.

[0045] Optionally, the second fin group includes at least two second fins spaced apart along the first direction, wherein the distance between each pair of adjacent second fins is D3, satisfying: 2.5 mm ≤ D3 ≤ 3.5 mm.

[0046] Optionally, the thickness of the second fin is defined along the first direction, and the thickness of the second fin is D4, satisfying: 0.8 mm ≤ D4 ≤ 1.2 mm.

[0047] Optionally, the height of the second fin is defined along the second direction, and the height of the second fin is H2, satisfying: 8 mm ≤ H1 ≤ 15 mm, wherein the second direction is set at an angle to the first direction.

[0048] According to a second aspect of this application, a projection device is provided, including a projection optical engine as described above.

[0049] In the projection optical engine and projection device of this application embodiment, a first air duct and a second air duct are formed inside the main body. The first air duct is used to dissipate heat for the optical elements, and the second air duct is used to dissipate heat for the lamp board and the first air duct. The second air duct dissipates heat for the lamp board while also dissipating heat for the first air duct, thereby carrying away the heat generated by the optical elements through heat conduction and preventing heat accumulation in the first air duct. A fan provides airflow to the first air duct and / or the second air duct, thereby achieving heat dissipation. Since the fan is connected to the main body through a flexible connector, the flexible connector can prevent vibration and collision between the fan and the main body and partially absorb the noise generated by the fan operation. Therefore, the noise generated by the projection optical engine during operation is reduced, and the user experience is improved.

[0050] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0051] 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.

[0052] 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.

[0053] Figure 1 This is a schematic diagram of the projection optical engine provided in an exemplary embodiment of this application;

[0054] Figure 2 This is one of the exploded views of the projection optical engine provided in the exemplary embodiments of this application;

[0055] Figure 3 This is the second exploded view of the projection optical engine provided in the exemplary embodiments of this application;

[0056] Figure 4 This is a cross-sectional view of the projection optical engine provided in an exemplary embodiment of this application;

[0057] Figure 5 This is an airflow diagram of the projection optical engine provided in an exemplary embodiment of this application;

[0058] Figure 6 This is a schematic diagram of the structure of the first heat sink provided in an exemplary embodiment of this application.

[0059] Explanation of reference numerals in the attached figures:

[0060] 11. First air duct; 12. Second air duct; 13. Chassis; 131. First heat dissipation channel; 132. Connecting post; 14. First heat sink; 141. Second heat dissipation channel; 142. Third heat dissipation channel; 143. Heat conduction plate; 144. First fin; 145. Second fin; 15. Air guide shroud; 151. Air guide channel; 16. Bottom shell; 161. Fourth heat dissipation channel; 17. Second heat sink; 171. Fifth heat dissipation channel;

[0061] 21. First fan; 211. Snap-fit ​​hole; 22. Second fan;

[0062] 31. First flexible section; 32. Second flexible section; 33. Third flexible section; 34. Fourth flexible section;

[0063] 41. First Fresnel lens; 42. Second Fresnel lens; 43. Imaging screen; 44. Heat-insulating glass;

[0064] 51. Light panel. Detailed Implementation

[0065] 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.

[0066] A projector is a display device that magnifies and projects images or videos onto a screen or wall, and is widely used in homes, offices, education, entertainment, and other fields. The core of a projector's optical imaging is the projection optical engine. The projection optical engine converts light emitted from a light source into a projectable image.

[0067] During the operation of the projection optical engine, the optical components and lamp board 51 generate a large amount of heat. If this heat is not dissipated in time, it may damage the optical components or lamp board 51, affecting the lifespan of the projector. To improve the heat dissipation of the optical components and lamp board 51, a heat dissipation structure is usually installed inside the projection optical engine.

[0068] The heat dissipation structure typically includes a fan. The fan is mounted inside the projector engine using fasteners. During operation, the rotation of the fan blades generates noise, and the rotation also causes the fan to vibrate to a certain extent. This can lead to the fan colliding with the mounting structure, generating noise and resulting in a deterioration of the user experience.

[0069] This embodiment of the application forms a first air duct 11 and a second air duct 12 inside the main body. The first air duct 11 is used to dissipate heat from the optical elements, and the second air duct 12 is used to dissipate heat from the lamp board 51 and the first air duct 11. The second air duct 12 dissipates heat from the lamp board 51 while also dissipating heat from the first air duct 11, thereby carrying away the heat generated by the optical elements through heat conduction and preventing heat accumulation in the first air duct 11. A fan provides airflow to the first air duct 11 and / or the second air duct 12, thereby achieving heat dissipation. Since the fan is connected to the main body through a flexible connector, the flexible connector can prevent vibration and collision between the fan and the main body and partially absorb the noise generated by the fan operation. Therefore, the noise generated by the projection optical engine during operation is reduced, improving the user experience.

[0070] Specifically, please refer to Figures 1 to 6This application provides a projection optical engine. The projection optical engine includes optical elements, a lamp panel 51, a main body, and a fan. A first air duct 11 and a second air duct 12 are formed inside the main body. The first air duct 11 and the second air duct 12 are thermally connected. The optical elements and the lamp panel 51 are both connected to the main body. The optical elements are located within the first air duct 11. The lamp panel 51 and the second air duct 12 are thermally connected. The fan is connected to the main body. A flexible connector is provided between the fan and the main body. The fan is used to generate airflow within the first air duct 11 and / or the second air duct 12.

[0071] Understandably, the lamp board 51 and optical components are used to achieve imaging and projection of the projection optical engine. During the operation of the projection optical engine, the lamp board 51 generates heat due to current driving and self-illumination. The optical components also generate heat due to transmitted light. By embedding the optical components within the enclosed first air duct 11, the first air duct 11 is used to dissipate heat from the optical components, preventing heat accumulation on the optical components and affecting their performance and lifespan. The lamp board 51 is thermally connected to the second air duct 12, thereby conducting the heat generated by the lamp board 51 to the second air duct 12 for heat dissipation, preventing heat accumulation on the lamp board 51 and damage to it.

[0072] In some embodiments, the first air duct 11 is a closed air duct. Because the first air duct 11 is a closed air duct, external dust and particles cannot enter the first air duct 11 during the heat dissipation process of the optical components, thus preventing dust and particles from adhering to the optical components and affecting the imaging effect. Since the first air duct 11 is a closed air duct, the airflow itself cannot expel heat from the main component when circulating in the first air duct 11. In this embodiment, by making the first air duct 11 and the second air duct 12 thermally connected, the heat of the airflow in the first air duct 11 can be conducted to the second air duct 12, ensuring that the airflow in the first air duct 11 is at a low temperature and preventing the internal temperature of the first air duct 11 from becoming too high.

[0073] In some embodiments, the second air duct 12 is an open air duct. Because it is an open air duct, airflow can enter the second air duct 12 through its inlet and exit through its outlet. When the airflow passes the point where the first air duct 11 and the second air duct 12 are thermally connected, it can exchange heat with the first air duct 11, thereby dissipating heat from the airflow within the first air duct 11 and preventing excessive heat buildup inside the first air duct 11. When the airflow passes the point where the lamp panel 51 is thermally connected to the second air duct 12, it can continue to exchange heat with the lamp panel 51, thereby dissipating heat from the lamp panel 51 and preventing it from overheating and being damaged.

[0074] like Figure 5As shown in this embodiment, along the airflow direction of the second air duct 12, the thermal connection between the first air duct 11 and the second air duct 12 is located at the front end of the airflow connection between the lamp panel 51 and the second air duct 12.

[0075] In some embodiments, a single fan is provided and located within the first air duct 11. The fan generates airflow to circulate within the first air duct 11, thereby removing heat from the optical components. The second air duct 12 can be circulated by external airflow to dissipate heat from the first air duct 11 and the lamp panel 51.

[0076] In some embodiments, two fans are configured, one in the first air duct 11 and the other in the second air duct 12. The fan in the first air duct 11 generates airflow within the duct, allowing the airflow to circulate and remove heat from the optical components. The fan in the second air duct 12 generates airflow within the duct, allowing cool external air to enter and dissipate heat from the first air duct 11 and the lamp panel 51, and then exhausting the hot air from the outlet of the second air duct 12.

[0077] In some embodiments, a single fan is configured and located within the second air duct 12, allowing cold external air to enter the second air duct 12 to dissipate heat from the first air duct 11 and the lamp panel 51, and allowing the hot air to exit from the air outlet of the second air duct 12. The first air duct 11 can experience a certain degree of airflow as its temperature rises, thereby facilitating heat exchange at the thermally conductive connection between the first air duct 11 and the second air duct 12, achieving cooling of the first air duct 11, and thus cooling of the optical components.

[0078] In some embodiments, the fan may not be located in the first air duct 11 and the second air duct 12, so that the fan can blow air into the first air duct 11 and / or the second air duct 12, so that the air can flow along the first air duct 11 and / or the second air duct 12 to dissipate heat from the optical elements and / or the lamp panel 51.

[0079] In some embodiments, the flexible connector is located between the opposing surfaces of the fan and the main body. The opposite sides of the flexible connector may be bonded to the fan and the main body. Alternatively, one side of the flexible connector may be bonded to one of the fan and the main body, and the other side of the flexible connector may abut against the other of the fan and the main body.

[0080] In some embodiments, the flexible connector is made of materials such as foam, rubber, or polyurethane.

[0081] In some embodiments, such as Figure 4 and Figure 5As shown, the main body includes a housing 13. A first heat dissipation channel 131 is formed inside the housing 13. The first heat dissipation channel 131 forms at least a portion of the air duct section of the first air duct 11. The optical element is connected to the housing 13 and is located within the first heat dissipation channel 131.

[0082] Understandably, the housing 13 is used to mount the optical components and the lamp board 51, so that the optical components and the lamp board 51 are built into the housing 13. The optical components are located in the first heat dissipation channel 131. When airflow passes through the first heat dissipation channel 131, it can carry away the heat of the optical components, thereby achieving heat dissipation of the optical components.

[0083] In some embodiments, please continue reading Figure 4 and Figure 5 The main body also includes a first heat sink 14. The first heat sink 14 is connected to the housing 13. A second heat dissipation channel 141 is formed inside the first heat sink 14. The second heat dissipation channel 141 communicates with the first heat dissipation channel 131 to form at least a portion of the air duct section of the first air duct 11. The first heat sink 14 is used to conduct heat in the first air duct 11 to the second air duct 12 or release it to the ambient space.

[0084] Understandably, the first heat sink 14, as a heat dissipation device, can absorb heat from the air in the second heat dissipation channel 141, thereby reducing the temperature of the circulating airflow and keeping it at a low temperature to facilitate heat dissipation for the optical components. The first heat sink 14 can also conduct heat from the first air duct 11 to the second air duct 12 or release it into the ambient space, thereby achieving heat dissipation and preventing heat accumulation.

[0085] In some embodiments, please continue reading Figure 4 and Figure 5 The main component also includes an air guide shroud 15. The air guide shroud 15 is connected to the housing 13. An air guide channel 151 is formed inside the air guide shroud 15. The first heat dissipation channel 131, the second heat dissipation channel 141 and the air guide channel 151 are connected to form a first air duct 11.

[0086] Understandably, after the first heat sink 14 and the air guide shroud 15 are installed in the housing 13, the first end of the first heat dissipation channel 131 inside the housing 13 is connected to the first end of the second heat dissipation channel 141 inside the first heat sink 14. The opposite ends of the air guide channel 151 inside the air guide shroud 15 can be connected to the second ends of the first heat dissipation channel 131 inside the housing 13 and the second ends of the second heat dissipation channel 141 inside the first heat sink 14, respectively. Thus, the first heat dissipation channel 131, the second heat dissipation channel 141, and the air guide channel 151 can be connected end to end to form a closed first air duct 11.

[0087] In some embodiments, the first heat sink 14 and the air guide shroud 15 are both mounted to the housing 13 by fasteners. For example, the first heat sink 14 and the air guide shroud 15 are both mounted to the housing 13 by screws.

[0088] In some embodiments, the plane where the air inlet of the air guide shroud 15 is located is perpendicular to the plane where the air outlet of the air guide shroud 15 is located, thereby using the air guide shroud 15 to guide the airflow to a preset area.

[0089] In some embodiments, the side of the air guide 15 away from the housing 13 abuts against the outer surface of the first heat sink 14, thereby forming a compact connection between the housing 13, the air guide 15 and the first heat sink 14, thereby reducing the size of the projection optical engine by optimizing the spatial layout.

[0090] In some embodiments, such as Figure 2 and Figure 4 As shown, the fan includes a first fan 21. The first fan 21 is connected to the housing 13 and is located within the first air duct 11. The air outlet of the first fan 21 faces the air guide shroud 15. The flexible connector includes a first flexible portion 31. The first flexible portion 31 is disposed between the first fan 21 and the first flexible portion 31, and the first flexible portion 31 is arranged around the air outlet of the first fan 21.

[0091] Understandably, the first fan 21 is located within the first air duct 11. When the first fan 21 operates, it causes the air within the first air duct 11 to flow in a preset direction, forming an airflow with a certain velocity, which facilitates cooling of the optical components. The air outlet of the first fan 21 is surrounded by a first flexible portion 31, which abuts against the air guide cover 15. Thus, the first flexible portion 31 can be used to prevent the first fan 21 from vibrating and colliding with the air guide cover 15, and to partially absorb the noise generated by the operation of the first fan 21.

[0092] The first flexible part 31 can also seal the connection between the first fan 21 and the air guide cover 15, improve the airtightness of the connection between the first fan 21 and the air guide cover 15, and prevent air leakage between the two so that dust and particulate matter can enter the first air duct 11 with the outside air.

[0093] The first flexible part 31 can also fill the connection gap between the first fan 21 and the air guide shroud 15, improving the reliability of the connection between the two in a compact installation space.

[0094] In some embodiments, the opposite sides of the first flexible portion 31 are respectively bonded to the first fan 21 and the air guide shroud 15. Alternatively, one side of the first flexible portion 31 is bonded to the first fan 21, and the other side abuts against the air guide shroud 15. Alternatively, the opposite sides of the first flexible portion 31 abut against the first fan 21 and the air guide shroud 15.

[0095] In some embodiments, the first fan 21 is a centrifugal fan, and the first fan 21 is installed in a vertical position.

[0096] In some embodiments, such as Figure 3 and Figure 4 As shown, the air inlet of the first fan 21 faces the first heat sink 14. The flexible connector also includes a second flexible portion 32. The second flexible portion 32 is disposed between the first fan 21 and the first heat sink 14, and the second flexible portion 32 is disposed close to the air inlet of the first fan 21.

[0097] It is understandable that the first fan 21 also abuts against the first heat sink 14 through the second flexible part 32. The second flexible part 32 can be used to prevent the first fan 21 from vibrating and colliding with the first heat sink 14, and to partially absorb the noise generated by the operation of the first fan 21.

[0098] The second flexible part 32 can also seal the connection between the first fan 21 and the first heat sink 14, improve the airtightness of the connection between the first fan 21 and the first heat sink 14, and prevent air leakage between the two so that dust and particulate matter can enter the first air duct 11 with the outside air.

[0099] The second flexible part 32 can also fill the connection gap between the first fan 21 and the first heat sink 14, improving the reliability of the connection between the two in a compact installation space.

[0100] In some embodiments, the opposite sides of the second flexible portion 32 are respectively bonded to the first fan 21 and the first heat sink 14. Alternatively, one side of the second flexible portion 32 is bonded to the first fan 21, and the other side abuts against the first heat sink 14. Alternatively, the opposite sides of the second flexible portion 32 abut against the first fan 21 and the first heat sink 14.

[0101] In some embodiments, please continue reading Figure 2 The housing 13 is provided with a snap-fit ​​post 132. The first fan 21 is provided with a snap-fit ​​hole 211. The snap-fit ​​post 132 snaps into the snap-fit ​​hole 211.

[0102] It is understandable that by directly installing the first fan 21's snap-fit ​​hole 211 into the snap-fit ​​post 132 on the surface of the housing 13, the first fan 21 and the housing 13 can be quickly installed and removed, improving the installation efficiency of the first fan 21 and thus improving the production efficiency of the projection optical engine.

[0103] In some embodiments, a flexible ring may also be fitted onto the outer surface of the locking post 132. When the locking hole 211 and the locking post 132 are engaged, the flexible ring is located between the outer peripheral surface of the locking post 132 and the wall surface of the locking hole 211. The flexible ring prevents the first fan 21 from vibrating and colliding with the locking post 132 and the housing 13, and partially absorbs the noise generated by the operation of the first fan 21. The flexible ring also makes the fit between the locking post 132 and the locking hole 211 tighter, improving the reliability of the first fan 21's fixation.

[0104] In some embodiments, at least two snap-fit ​​posts 132 may be provided, and the at least two snap-fit ​​posts 132 are spaced apart on the surface of the housing 13. Snap-fit ​​holes 211 correspond one-to-one with snap-fit ​​posts 132.

[0105] In some embodiments, if the snap-fit ​​post 132 is a circular post, then the snap-fit ​​hole 211 is a circular hole. Alternatively, if the snap-fit ​​post 132 is a square post, then the snap-fit ​​hole 211 is a square hole.

[0106] In some embodiments, such as Figure 4 As shown, the optical elements include at least one of a first Fresnel lens 41, a second Fresnel lens 42, an imaging screen 43, and a heat-insulating glass 44. The first Fresnel lens 41 and the second Fresnel lens 42 are spaced apart within the housing 13, defining a first heat dissipation channel 131 within the housing 13. The imaging screen 43 is disposed within the housing 13, located between the first Fresnel lens 41 and the second Fresnel lens 42. The heat-insulating glass 44 is disposed within the housing 13, located between the first Fresnel lens 41 and the imaging screen 43.

[0107] It is understood that the first Fresnel lens 41, the second Fresnel lens 42, the imaging screen 43, and the heat-insulating glass 44 are all built into the housing 13. The first Fresnel lens 41 and the second Fresnel lens 42 are spaced apart, and the first Fresnel lens 41 and the second Fresnel lens 42, together with the shell wall of the housing 13, can form a first heat dissipation channel 131. When airflow flows along the first heat dissipation channel 131, it can contact the surfaces of the first Fresnel lens 41 and the second Fresnel lens 42, thereby dissipating heat from the first Fresnel lens 41 and the second Fresnel lens 42. Based on the first heat dissipation channel 131 defined by the first Fresnel lens 41 and the second Fresnel lens 42, the imaging screen 43 and the heat-insulating glass 44 located between them are both located within the first heat dissipation channel 131. Therefore, when airflow flows along the first heat dissipation channel 131, it can contact the surfaces of the imaging screen 43 and the heat-insulating glass 44, thereby dissipating heat from the imaging screen 43 and the heat-insulating glass 44.

[0108] It should be noted that the first Fresnel lens 41, the imaging screen 43, the heat-insulating glass 44, and the second Fresnel lens 42 are arranged alternately in sequence, and the first Fresnel lens 41, the imaging screen 43, the heat-insulating glass 44, and the second Fresnel lens 42 are parallel to each other.

[0109] A first cavity can be formed between the first Fresnel lens 41 and the imaging screen 43. A second cavity can be formed between the imaging screen 43 and the heat-insulating glass 44. A third cavity can be formed between the heat-insulating glass 44 and the second Fresnel lens 42. The second and third cavities are arranged in parallel. The first ends of both the second and third cavities are connected to the airflow channel 151 of the air guide shroud 15, and the second ends of both the second and third cavities are connected to the first end of the first cavity. The second end of the first cavity is connected to the second heat dissipation channel 141 within the first heat sink 14. The airflow generated by the first fan 21, after exiting the air guide shroud 15 through the airflow channel 151, can enter the second and third cavities respectively. The airflow entering the third cavity can dissipate heat for the second Fresnel lens 42 and the heat-insulating glass 44, and the airflow entering the second cavity can dissipate heat for the heat-insulating glass 44 and the imaging screen 43. Then, the airflow converges and enters the first cavity, thereby dissipating heat for the imaging screen 43 and the first Fresnel lens 41.

[0110] In some embodiments, the first Fresnel lens 41 is a front Fresnel lens. The first Fresnel lens 41 can refocus the scattered light transmitted through the imaging screen 43, improve the utilization rate of light entering the lens, and reduce light loss. The first Fresnel lens 41 can also optimize the projection angle, avoid vignetting at the edges, and ensure uniform image brightness.

[0111] In some embodiments, the second Fresnel lens 42 is a rear Fresnel lens. The second Fresnel lens 42 can convert the divergent light emitted by the light source into uniform parallel light to eliminate hot spots and dark areas, ensuring uniform illumination of the imaging screen 43. The second Fresnel lens 42 can also reduce the incident angle of light, so that the light shines perpendicularly onto the imaging screen 43, improving contrast and color accuracy.

[0112] In some embodiments, the imaging screen 43 is an LCD (Liquid Crystal Display). The liquid crystal molecules in the imaging screen 43 can be deflected under voltage control, thereby adjusting the light transmittance of each pixel to generate a bright and dark image. The imaging screen 43 can also perform color synthesis to form a full-color display.

[0113] In some embodiments, the heat-insulating glass 44 can absorb or reflect infrared rays from the light source to prevent the imaging screen 43 from aging due to high temperatures. The heat-insulating glass 44 can also block ultraviolet rays to prevent ultraviolet rays from acting on the imaging screen 43 and reducing its service life.

[0114] In some embodiments, please continue reading Figure 4 and Figure 5A third heat dissipation channel 142 is also formed within the first heat sink 14. The third heat dissipation channel 142 forms at least a portion of the air duct section of the second air duct 12. The third heat dissipation channel 142 is thermally connected to the second heat dissipation channel 141 and is used to conduct heat from the first air duct 11 to the second air duct 12.

[0115] It is understood that the third heat dissipation channel 142 and the second heat dissipation channel 141 are independent of each other, and the two can conduct heat. Therefore, when the airflow in the first air duct 11 flows through the second heat dissipation channel 141, it can conduct heat to the third heat dissipation channel 142 to achieve heat dissipation, thereby keeping the first air duct 11 in a lower temperature range.

[0116] In some embodiments, please continue reading Figure 4 and Figure 5 The main body also includes a bottom shell 16. The bottom shell 16 is connected to the housing 13 and the first heat sink 14. A fourth heat dissipation channel 161 is formed inside the bottom shell 16. The fourth heat dissipation channel 161 communicates with the third heat dissipation channel 142 to form at least a portion of the air duct section of the second air duct 12.

[0117] It is understandable that the fourth heat dissipation channel 161 formed inside the bottom shell 16 can guide the airflow so that the airflow cooled at the first heat sink 14 flows along a preset path, ensuring that the cooled airflow can dissipate heat for the lamp panel 51.

[0118] The base shell 16 serves as the base for the heat dissipation optical engine and can be connected to the housing 13 via fasteners. The base shell 16 can be a single integrated structure or a separate structure. That is, the base shell 16 can be a single structural component or a collection of multiple structural components.

[0119] In some embodiments, please continue reading Figure 4 and Figure 5 The main body also includes a second heat sink 17. The second heat sink 17 is connected to the housing 13 and the bottom shell 16. A fifth heat dissipation channel 171 is formed inside the second heat sink 17. The third heat dissipation channel 142, the fourth heat dissipation channel 161 and the fifth heat dissipation channel 171 are connected in sequence to form a second air duct 12. The lamp panel 51 is thermally connected to the second heat sink 17. The second heat sink 17 is used to release the heat in the second air duct 12 to the ambient space.

[0120] Understandably, the second heat sink 17 is thermally connected to the lamp board 51, thereby dissipating heat from the lamp board 51. Specifically, the heat generated by the lamp board 51 during operation can be transferred to the fifth heat dissipation channel 171 through thermal conduction, and this heat is carried away by airflow, thus achieving heat dissipation of the lamp board 51.

[0121] The heat in the second air duct 12 is collected in the second radiator 17, and then all the heat can be released into the ambient space through the second radiator 17 to expel the heat from the projection optical engine.

[0122] In some embodiments, the lamp board 51 is an LED lamp board 51 (light-emitting diode). The lamp board 51 can be fixed to the second heat sink 17 by screws. Lamp beads are disposed on the side of the lamp board 51 facing the second Fresnel lens 42. The lamp board 51 and the second heat sink 17 can also be thermally connected by a thermally conductive silicone grease layer, thereby improving the heat dissipation efficiency of the lamp board 51.

[0123] In some embodiments, please continue reading Figure 4 and Figure 5 The end of the third heat dissipation channel 142 away from the fourth heat dissipation channel 161 forms a heat dissipation air inlet on the surface of the first heat sink 14. The end of the fifth heat dissipation channel 171 away from the fourth heat dissipation channel 161 forms a heat dissipation air outlet on the surface of the second heat sink 17.

[0124] Understandably, the third heat dissipation channel 142 in the first radiator 14, the fourth heat dissipation channel 161 in the bottom shell 16, and the fifth heat dissipation channel 171 in the second radiator 17 are sequentially connected. The third heat dissipation channel 142 forms a heat dissipation inlet on the surface of the first radiator 14, and the fifth heat dissipation channel 171 forms a heat dissipation outlet on the surface of the second radiator 17, thus forming an open second air duct 12. This allows external air to enter the third heat dissipation channel 142 through the heat dissipation inlet, absorb internal heat, and then be discharged from the heat dissipation outlet of the second radiator 17. This releases heat from the second air duct 12 into the ambient space.

[0125] In some embodiments, such as Figure 3 As shown, the fan also includes a second fan 22. The second fan 22 is connected to the bottom housing 16 and is located within the fourth heat dissipation channel 161. The flexible connector also includes a third flexible portion 33. The third flexible portion 33 is connected between the second fan 22 and the bottom housing 16.

[0126] It is understandable that a third flexible part 33 is provided between the second fan 22 and the bottom shell 16. When the second fan 22 is running, the third flexible part 33 can prevent the second fan 22 from vibrating and colliding with the bottom shell 16, and partially absorb the noise generated by the operation of the second fan 22.

[0127] In some embodiments, the front baffle of the bottom housing 16 has an opening. A portion of the second fan 22 protrudes through the opening. This allows the bottom housing 16 to accommodate a larger second fan 22. It should be noted that when the second fan 22 protrudes through the opening, the airtightness of the opening must be ensured to prevent air leakage and thus affect the heat dissipation efficiency.

[0128] In some embodiments, the second fan 22 is a centrifugal fan, and the second fan 22 is installed in a horizontal position.

[0129] In some embodiments, please continue reading Figure 3 The second fan 22 is fixed to the bottom shell 16 by fasteners. The third flexible part 33 is sleeved on the fasteners.

[0130] Understandably, the second fan 22 is fixed to the bottom housing 16 by fasteners to achieve a reliable connection between the second fan 22 and the bottom housing 16. The third flexible part 33 is configured as annular and sleeved on the fasteners, thereby using the third flexible part 33 to prevent the second fan 22 from vibrating and colliding with the bottom housing 16, and to partially absorb the noise generated by the operation of the second fan 22.

[0131] In some embodiments, the fastener is a bolt. The bolt has a threaded section and a bolt head. The threaded section is used to connect to a threaded hole on the base housing 16, and the bolt head is used to abut against the second fan 22 to fix the second fan 22 to the base housing 16. A third flexible portion 33 is annular and sleeved on the threaded section. The inner diameter of the third flexible portion 33 is greater than or equal to the diameter of the threaded section, and the outer diameter of the third flexible portion 33 is smaller than the diameter of the bolt head. When the bolt head is hexagonal, the outer diameter of the third flexible portion 33 is smaller than the diameter of the circumcircle corresponding to the bolt head.

[0132] In some embodiments, such as Figure 2 and Figure 4 As shown, the fan also includes a second fan 22. The second fan 22 is connected to the bottom shell 16 and is located within the fourth heat dissipation channel 161. The flexible connector also includes a fourth flexible portion 34. The fourth flexible portion 34 is disposed between the second fan 22 and the second heat sink 17, and the fourth flexible portion 34 is arranged around the air outlet of the second fan 22.

[0133] Understandably, the fourth flexible part 34 surrounding the air outlet of the second fan 22 can prevent the second fan 22 from vibrating and colliding with the second radiator 17 during operation, and partially absorb the noise generated by the operation of the second fan 22.

[0134] The fourth flexible part 34 can also seal the connection between the second fan 22 and the second heat sink 17, improve the airtightness of the connection between the second fan 22 and the second heat sink 17, and prevent air leakage between the two so that dust and particulate matter can enter the first air duct 11 with the outside air.

[0135] The fourth flexible part 34 can also fill the connection gap between the second fan 22 and the second heat sink 17, improving the reliability of the connection between the two in a compact installation space.

[0136] In some embodiments, the opposite sides of the fourth flexible portion 34 are respectively bonded to the second fan 22 and the second heat sink 17. Alternatively, one side of the fourth flexible portion 34 is bonded to the second fan 22, and the other side abuts against the second heat sink 17. Alternatively, the opposite sides of the fourth flexible portion 34 abut against the second fan 22 and the second heat sink 17, respectively.

[0137] In some embodiments, such as Figure 4 As shown, the first radiator 14 is provided with a heat-conducting plate 143, which is used to divide the internal space of the first radiator 14 into a second heat dissipation channel 141 and a third heat dissipation channel 142.

[0138] It is understandable that the heat-conducting plate 143 can conduct heat from the second heat dissipation channel 141 to the third heat dissipation channel 142, so that the first air duct 11, which is in a closed state, can be kept at a low temperature, which is conducive to the heat dissipation of optical components under the action of low temperature airflow.

[0139] In some embodiments, a first fin group and a second fin group are respectively connected to opposite sides of the heat-conducting plate 143. The first fin group is located within the second heat dissipation channel 141. The second fin group is located within the third heat dissipation channel 142.

[0140] It is understandable that the heat-conducting plate 143 can conduct the heat of the first fin group to the second fin group, thereby conducting the heat in the second heat dissipation channel 141 to the third heat dissipation channel 142, so that the first air duct 11 in the closed state can be kept at a low temperature, which is conducive to the heat dissipation of optical components under the action of low temperature airflow.

[0141] In some embodiments, if the first radiator 14 is integrally die-cast, then the heat-conducting plate 143, the first fin group, and the second fin group are integrally formed.

[0142] In some embodiments, the first fin group and the second fin group located on opposite sides of the heat-conducting plate 143 correspond one-to-one. That is, the first fin group includes at least two first fins 144 spaced apart in a first direction. The second fin group includes at least two second fins 145 spaced apart in a first direction. In the first direction, a first fin 144 corresponds to a second fin 145.

[0143] In some embodiments, the first fin group and the second fin group located on opposite sides of the heat-conducting plate 143 are staggered. That is, the first fin group includes at least two first fins 144 spaced apart in a first direction. The second fin group includes at least two second fins 145 spaced apart in a first direction. In the first direction, the first fins 144 and the second fins 145 are staggered.

[0144] In some embodiments, such as Figure 6As shown, the first fin group includes at least two first fins 144 spaced apart along a first direction. The distance between any two adjacent first fins 144 is D1, which satisfies the condition: 2.5 mm ≤ D1 ≤ 3.5 mm.

[0145] Understandably, the spacing D1 between any two adjacent first fins 144 is set within the range of 2.5 mm to 3.5 mm to ensure good heat dissipation of the first fin assembly and to ensure that the first fin assembly can be die-cast. When the spacing D1 between two adjacent first fins 144 is less than 2.5 mm, it will increase the difficulty of die casting, and may even make the die-casting process impossible, making it difficult to form the first heat sink 14. When the spacing D1 between two adjacent first fins 144 is greater than 3.5 mm, due to the limited space of the first heat sink 14, on the one hand, the number of first fins 144 will be less, reducing heat dissipation efficiency. On the other hand, the spacing between two adjacent first fins 144 will be too large, making it more difficult for the high-temperature airflow between them to conduct heat to the first fins 144, thus affecting the heat dissipation effect.

[0146] For example, the spacing D1 between any two adjacent first fins 144 can be set to 2.5 mm, 3 mm, 3.5 mm, or any value between the two. In this embodiment, the specific value of the spacing D1 between two adjacent first fins 144 is not limited.

[0147] In some embodiments, please continue reading Figure 6 The thickness of the first fin 144 is defined along the first direction. The thickness of the first fin 144 is D2, which satisfies: 0.8 mm ≤ D2 ≤ 1.2 mm.

[0148] It is understood that the first direction is the thickness direction of the first fin 144. The thickness D2 of each first fin 144 is set within the range of 0.8 mm to 1.2 mm to ensure sufficient strength for each first fin 144 and to guarantee the heat dissipation effect of the first fin assembly. When the thickness D2 of the first fin 144 is less than 0.8 mm, the first fin 144 is too thin, resulting in insufficient strength and potential breakage due to external impacts. When the thickness of the first fin 144 is greater than 1.2 mm, the limited space in the first heat sink 14 reduces the number of heat exchange gaps between adjacent first fins 144, decreasing heat dissipation efficiency. Simultaneously, a reduction in the number of heat exchange gaps between adjacent first fins 144 also reduces the effective heat dissipation space within the first heat sink 14, decreasing the cross-sectional area for airflow and increasing airflow velocity. Increased airflow velocity leads to insufficient heat exchange, further reducing heat dissipation efficiency.

[0149] For example, the thickness D2 of the first fin 144 can be set to 0.8 mm, 1 mm, 1.2 mm, or any value between the two. In this embodiment, the specific value of the thickness D2 of the first fin 144 is not limited.

[0150] In some embodiments, please continue reading Figure 6 The height of the first fin 144 is defined along the second direction. The height of the first fin 144 is H1, which satisfies: 10 mm ≤ H1 ≤ 20 mm. The second direction is angled relative to the first direction.

[0151] It is understandable that the second direction refers to the height direction of the first fin 144. The height H1 of each first fin 144 is set within the range of 10 mm to 20 mm to ensure the heat dissipation effect of the first fin group. When the height H1 of the first fin 144 is less than 10 mm, the heat exchange space of the first fin group is insufficient, resulting in lower heat dissipation efficiency. When the height H1 of the first fin 144 is greater than 20 mm, the height of the first fin 144 is too high, leading to an excessively large cavity diameter of the second heat dissipation channel 141. For the same product, the size of the first heat sink 14 is a fixed value. An excessively large cavity diameter of the second heat dissipation channel 141 will result in an excessively small cavity diameter of the third heat dissipation channel 142, causing insufficient heat dissipation efficiency of the third heat dissipation channel 142. This will affect the heat dissipation of the lamp board 51 on the one hand, and the heat dissipation of the second heat dissipation channel 141 on the other hand, thus affecting the heat dissipation of the optical components.

[0152] For example, the height H1 of the first fin 144 can be set to 10 mm, 15 mm, 20 mm, or any value between the two. In this embodiment, the specific value of the height H1 of the first fin 144 is not limited.

[0153] In some embodiments, the second direction is set at an acute angle to the first direction. Alternatively, the second direction is set at an obtuse angle to the first direction. Alternatively, the second direction is perpendicular to the first direction.

[0154] In some embodiments, the height of the first fin 144 gradually changes along a third direction. Alternatively, the height of the first fin 144 is a constant along a third direction. The height of the first fin 144 can be reasonably selected based on the cavity diameter of the second heat dissipation channel 141. The third direction is angled to both the first and second directions. For example, the third direction is perpendicular to the first direction and also perpendicular to the second direction.

[0155] In some embodiments, please continue reading Figure 6 The second fin group includes at least two second fins 145 spaced apart along a first direction. The distance between any two adjacent second fins 145 is D3, satisfying: 2.5 mm ≤ D3 ≤ 3.5 mm.

[0156] Understandably, the spacing D3 between any two adjacent second fins 145 is set within the range of 2.5 mm to 3.5 mm to ensure good heat dissipation of the second fin assembly and to ensure that the second fin assembly can be die-cast. When the spacing D3 between two adjacent second fins 145 is less than 2.5 mm, it will increase the difficulty of die casting, and may even make the die-casting process impossible, making it difficult to form the second heat sink 17. When the spacing D3 between two adjacent second fins 145 is greater than 3.5 mm, due to the limited space of the second heat sink 17, on the one hand, the number of second fins 145 will be less, reducing heat dissipation efficiency. On the other hand, the spacing between two adjacent second fins 145 will be too large, making it more difficult for the high-temperature airflow between them to conduct heat to the second fins 145, thus affecting the heat dissipation effect.

[0157] For example, the spacing D3 between any two adjacent second fins 145 can be set to 2.5 mm, 3 mm, 3.5 mm, or any value between the two. In this embodiment, the specific value of the spacing D3 between two adjacent second fins 145 is not limited.

[0158] It should be noted that the first direction referred to in this embodiment is the same as the first direction of the first fin group in the previous embodiment.

[0159] In some embodiments, please continue reading Figure 6 The thickness of the second fin 145 is defined along the first direction. The thickness of the second fin 145 is D4, which satisfies: 0.8 mm ≤ D4 ≤ 1.2 mm.

[0160] It is understandable that the second direction refers to the thickness direction of the second fin 145. The thickness D4 of each second fin 145 is set within the range of 0.8 mm to 1.2 mm to ensure sufficient strength for each second fin 145 and to guarantee the heat dissipation effect of the second fin assembly. When the thickness D4 of the second fin 145 is less than 0.8 mm, the second fin 145 is too thin, resulting in insufficient strength and potential breakage due to external impacts. When the thickness of the second fin 145 is greater than 1.2 mm, the limited space in the second heat sink 17 reduces the number of heat exchange gaps between adjacent second fins 145, decreasing heat dissipation efficiency. Simultaneously, a reduction in the number of heat exchange gaps between adjacent second fins 145 also reduces the effective heat dissipation space within the second heat sink 17, decreasing the cross-sectional area for airflow and increasing airflow velocity. Increased airflow velocity leads to insufficient heat exchange, further reducing heat dissipation efficiency.

[0161] For example, the thickness D4 of the second fin 145 can be set to 0.8 mm, 1 mm, 1.2 mm, or any value between the two. In this embodiment, the specific value of the thickness D4 of the second fin 145 is not limited.

[0162] In some embodiments, please continue reading Figure 6 The height of the second fin 145 is defined along the second direction. The height of the second fin 145 is H2, which satisfies: 8 mm ≤ H1 ≤ 15 mm. The second direction is angled relative to the first direction.

[0163] It is understandable that the second direction refers to the height direction of the second fin 145. The height H2 of each second fin 145 is set within the range of 8 mm to 15 mm to ensure the heat dissipation effect of the second fin assembly. When the height H2 of the second fin 145 is less than 8 mm, the heat exchange space of the second fin assembly is insufficient, resulting in lower heat dissipation efficiency. When the height H2 of the second fin 145 is greater than 15 mm, the height of the second fin 145 becomes too high, leading to an excessively large cavity diameter of the third heat dissipation channel 142. For the same product, the size of the first heat sink 14 is a fixed value. An excessively large cavity diameter of the third heat dissipation channel 142 will result in an excessively small cavity diameter of the second heat dissipation channel 141, causing insufficient heat dissipation efficiency of the second heat dissipation channel 141. This will affect the heat exchange efficiency between the gas in the second heat dissipation channel 141 and the heat-conducting plate 143 and the first fin 144, thus reducing the heat dissipation efficiency of the optical components.

[0164] For example, the height H2 of the second fin 145 can be set to 8 mm, 12 mm, 15 mm, or any value between the two. In this embodiment, the specific value of the height H2 of the second fin 145 is not limited.

[0165] In some embodiments, the second direction is set at an acute angle to the second direction. Alternatively, the second direction is set at an obtuse angle to the second direction. Alternatively, the second direction is perpendicular to the second direction.

[0166] In some embodiments, the height of the second fin 145 gradually changes along the third direction. Alternatively, the height of the second fin 145 is a constant along the third direction. The height of the second fin 145 can be reasonably selected based on the cavity diameter of the third heat dissipation channel 142. The third direction is angularly positioned to both the first and second directions. For example, the third direction is perpendicular to the first direction and also perpendicular to the second direction.

[0167] According to a second aspect of this application, a projection device is provided, which includes the aforementioned projection optical engine. This projection device possesses all the beneficial effects of the aforementioned projection optical engine, which will not be elaborated further herein.

[0168] In some embodiments, the projection device includes an LCD projector (liquid crystal projector), a DLP projector (digital light processing projector), an LCoS projector (liquid crystal on silicon projector), etc.

[0169] 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.

[0170] 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.

[0171] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0172] 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 projection optical engine, comprising optical elements and a lamp panel, characterized in that, The projection optical engine also includes: The main body has a first air duct and a second air duct inside, and the first air duct and the second air duct are thermally connected. The optical element and the lamp board are both connected to the main body. The optical element is located in the first air duct, and the lamp board is thermally connected to the second air duct. A fan is connected to the main body, and a flexible connector is provided between the fan and the main body. The fan is used to form airflow in the first air duct and / or the second air duct.

2. The projection optical engine according to claim 1, characterized in that, The main component includes: The housing has a first heat dissipation channel inside, which forms at least a portion of the first air duct. The optical element is connected to the housing and is located within the first heat dissipation channel.

3. The projection optical engine according to claim 2, characterized in that, The main component also includes: A first radiator is connected to the housing, and a second heat dissipation channel is formed inside the first radiator. The second heat dissipation channel communicates with the first heat dissipation channel to form at least a portion of the first air duct. The first radiator is used to conduct heat in the first air duct to the second air duct or release it to the ambient space.

4. The projection optical engine according to claim 3, characterized in that, The main component also includes: An air guide shroud is connected to the housing, and an air guide channel is formed inside the air guide shroud. The first heat dissipation channel, the second heat dissipation channel and the air guide channel are connected to form the first air duct.

5. The projection optical engine according to claim 4, characterized in that, The fan includes: A first fan is connected to the housing and located within the first air duct, with the air outlet of the first fan facing the air guide shroud. The flexible connector includes: A first flexible part is disposed between the first fan and the air guide cover, and the first flexible part is arranged around the air outlet of the first fan.

6. The projection optical engine according to claim 5, characterized in that, The air inlet of the first fan faces the first heat sink, and the flexible connector further includes: The second flexible part is disposed between the first fan and the first heat sink, and the second flexible part is disposed close to the air inlet of the first fan.

7. The projection optical engine according to claim 5, characterized in that, The housing is provided with a snap-fit ​​post, and the first fan is provided with a snap-fit ​​hole, and the snap-fit ​​post is snapped into the snap-fit ​​hole.

8. The projection optical engine according to claim 2, characterized in that, The optical element includes: A first Fresnel lens and a second Fresnel lens are disposed at an interval within the housing, defining the first heat dissipation channel within the housing; and / or An imaging screen is disposed within the housing; and / or Insulated glass is installed inside the housing.

9. The projection optical engine according to any one of claims 3 to 7, characterized in that, The first radiator also has a third heat dissipation channel, which forms at least a portion of the second air duct. The third heat dissipation channel is thermally connected to the second heat dissipation channel and is used to conduct heat from the first air duct to the second air duct.

10. The projection optical engine according to claim 9, characterized in that, The main component also includes: The bottom shell is connected to the housing and the first heat sink. A fourth heat dissipation channel is formed inside the bottom shell. The fourth heat dissipation channel communicates with the third heat dissipation channel to form at least a portion of the second air duct.

11. The projection optical engine according to claim 10, characterized in that, The main component also includes: The second radiator is connected to the housing and the bottom shell. A fifth heat dissipation channel is formed inside the second radiator. The third heat dissipation channel, the fourth heat dissipation channel and the fifth heat dissipation channel are connected to form the second air duct. The lamp panel is thermally connected to the second heat sink, which is used to release heat from the second air duct into the ambient space.

12. The projection optical engine according to claim 11, characterized in that, The third heat dissipation channel has a heat dissipation air inlet formed on the surface of the first heat sink at one end away from the fourth heat dissipation channel, and the fifth heat dissipation channel has a heat dissipation air outlet formed on the surface of the second heat sink at one end away from the fourth heat dissipation channel.

13. The projection optical engine according to claim 11, characterized in that, The fan also includes: The second fan is connected to the bottom shell and is located within the fourth heat dissipation channel; The flexible connector further includes: The third flexible part is connected between the second fan and the bottom shell.

14. The projection optical engine according to claim 13, characterized in that, The second fan is fixed to the bottom shell by fasteners, and the third flexible part is sleeved on the fasteners.

15. The projection optical engine according to claim 11, characterized in that, The fan also includes: The second fan is connected to the bottom shell and is located in the fourth heat dissipation channel, with the air outlet of the second fan facing the second heat sink. The flexible connector further includes: A fourth flexible part is disposed between the second fan and the second heat sink, and the fourth flexible part is arranged around the air outlet of the second fan.

16. The projection optical engine according to claim 9, characterized in that, The first radiator is equipped with a heat-conducting plate, which is used to divide the internal space of the first radiator into the second heat dissipation channel and the third heat dissipation channel.

17. The projection optical engine according to claim 16, characterized in that, The heat-conducting plate is connected to a first fin group and a second fin group on opposite sides, respectively. The first fin group is located in the second heat dissipation channel, and the second fin group is located in the third heat dissipation channel.

18. The projection optical engine according to claim 17, characterized in that, The first fin group includes at least two first fins spaced apart along a first direction, wherein the distance between each pair of adjacent first fins is D1, satisfying: 2.5 mm ≤ D1 ≤ 3.5 mm.

19. The projection optical engine according to claim 18, characterized in that, The thickness of the first fin is defined along the first direction, and the thickness of the first fin is D2, which satisfies: 0.8 mm ≤ D2 ≤ 1.2 mm.

20. The projection optical engine according to claim 18, characterized in that, The height of the first fin is defined along the second direction, and the height of the first fin is H1, which satisfies: 10 mm ≤ H1 ≤ 20 mm, wherein the second direction is set at an angle to the first direction.

21. The projection optical engine according to claim 17, characterized in that, The second fin group includes at least two second fins spaced apart along a first direction, wherein the distance between each two adjacent second fins is D3, satisfying: 2.5 mm ≤ D3 ≤ 3.5 mm.

22. The projection optical engine according to claim 21, characterized in that, The thickness of the second fin is defined along the first direction, and the thickness of the second fin is D4, which satisfies: 0.8 mm ≤ D4 ≤ 1.2 mm.

23. The projection optical engine according to claim 21, characterized in that, The height of the second fin is defined along the second direction, and the height of the second fin is H2, which satisfies: 8 mm ≤ H1 ≤ 15 mm, wherein the second direction is set at an angle to the first direction.

24. A projection device, characterized in that, Includes a projection optical engine as described in any one of claims 1 to 23.

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