Light machine and projector

Abstract

The embodiment of the utility model relates to the technical field of projectors, and discloses an optical machine and a projector, and the optical machine comprises a light source assembly which comprises a front Fresnel lens and a rear Fresnel lens; the lens assembly is used for refracting light rays emitted from the light source assembly; the front Fresnel lens is arranged between the lens assembly and the rear Fresnel lens; preferably, a ventilation channel is formed between the front Fresnel lens and the rear Fresnel lens, the optical machine further comprises a shell, the lens assembly is fixed to the front end of the shell, and the light source assembly is connected to the rear end of the shell; the heat dissipation assembly is arranged on the first side portion of the shell and communicates with one end of the ventilation channel; the first fan is arranged on the second side portion in the shell, an air inlet of the first fan faces the inner space of the shell, and an air outlet of the first fan communicates with the other end of the ventilation channel; air in the inner space of the shell penetrates through the ventilation channel to reach the heat dissipation assembly under rotation of the first fan. According to the embodiment of the invention, the heat dissipation effect of the optical machine is improved.

Description

Technical Field

[0001] The present application relates to the technical field of projectors, and in particular to an optical machine and a projector. Background Art

[0002] The projector's optical machine includes an LED light board, a lens assembly and a lens assembly. The light emitted by the LED light board passes through the rear mirror, heat-insulating glass, display screen and front mirror of the lens assembly in turn to reach the lens assembly, and then the lens assembly refracts the incident light out.

[0003] Typically, a die-cast profile serves as the housing, securing the LED light board, lens assembly, and lens subassembly within the housing. The housing's sidewalls, lens assembly, and lens subassembly enclose a cavity. Heat dissipation occurs through the die-cast profile itself, causing heat from the optical engine to accumulate in the cavity. This makes it difficult to cool the lens assembly and LED light board, limiting the optical engine's luminous power and overall projector brightness.

[0004] Therefore, how to improve the heat dissipation effect of optical machines has become a technical problem that needs to be solved urgently. Utility Model Content

[0005] In view of the above problems, embodiments of the present application provide an optical machine and a projector, which have good heat dissipation effects.

[0006] According to one aspect of an embodiment of the present application, an optical machine is provided, which includes: a light source assembly, the light source assembly including a front mirror and a rear mirror; a lens assembly, for refracting light incident from the light source assembly; the front mirror is arranged between the lens assembly and the rear mirror; preferably, a ventilation channel is formed between the front mirror and the rear mirror, and the optical machine also includes: a shell, the lens assembly is fixed to the front end of the shell, and the light source assembly is connected to the rear end of the shell; a heat dissipation assembly, provided on a first side portion of the shell and connected to one end of the ventilation channel; a first fan, provided on a second side portion inside the shell, the air inlet of the first fan facing the internal space of the shell, and the air outlet of the first fan connected to the other end of the ventilation channel; the air in the internal space of the shell passes through the ventilation channel to reach the heat dissipation assembly under the rotation of the first fan.

[0007] Preferably, the rear mirror is snapped onto the rear end of the shell to divide the internal space of the shell into a front shell and a rear shell; the lens assembly is arranged at the front end of the front shell, and the front mirror is arranged at the rear end of the front shell; the light source assembly also includes: a light-emitting component, arranged at the rear end of the rear shell, for emitting a light source toward the rear mirror; a display screen, arranged between the front mirror and the rear mirror, and a first air duct is formed between the front mirror and the display screen; insulating glass, arranged between the display screen and the rear mirror, and a second air duct is formed between the insulating glass and the display screen, and a third air duct is formed between the display screen and the rear mirror; a heat dissipation assembly is arranged on the first side of the front shell, and a first fan is arranged on the second side of the front shell, and the air in the internal space of the front shell passes through the first air duct, the second air duct and the third air duct respectively under the rotation of the first fan to reach the heat dissipation assembly.

[0008] Preferably, a first baffle and a second baffle are provided inside the front shell; the first baffle and the first side wall of the front shell enclose an air outlet of the ventilation channel, and the heat dissipation assembly is fixed to the first baffle for contacting the air at the air outlet; the second baffle and the second side wall of the front shell enclose an air inlet of the ventilation channel, and the first fan is fixed to the second baffle for blowing the air in the internal space of the front shell to the ventilation channel.

[0009] Preferably, a first partition and a second partition are further provided inside the front shell; the first partition is provided at the heat dissipation assembly, and the heat dissipation assembly abuts between the first partition and the side wall of the front shell; the second partition is provided at the air inlet of the first fan for fixing the first fan.

[0010] Preferably, the heat dissipation assembly includes a first heat dissipation fin, which passes through the first side wall of the front shell, partially extends into the interior of the front shell, and abuts between the first partition and the first side wall of the front shell, and is used to contact the air in the internal space of the front shell and the air outlet of the ventilation channel, and the other part is located in the external space of the front shell.

[0011] Preferably, the heat dissipation assembly further includes a second fan, which is fixed outside the front shell and close to the first heat dissipation fins, with the air outlet of the second fan aligned with the first heat dissipation fins and the air inlet of the second fan facing the external space of the front shell.

[0012] Preferably, the two ends of the display screen are respectively connected with an outlet guide plate and an inlet guide plate; the outlet guide plate has a certain arc surface and is arranged at the outlet of the air outlet channel, and the arc surface shape of the outlet guide plate is adapted to the bending arc shape at the connection between the rear end of the front shell and the first side wall; the inlet guide plate has a certain arc surface and is arranged at the outlet of the air inlet channel, and the arc surface shape of the inlet guide plate is adapted to the bending arc shape at the connection between the rear end of the front shell and the second side wall.

[0013] Preferably, the light-emitting component includes an LED light board, which is arranged at the rear wall of the rear shell and is used to transfer the heat of the LED light board to the rear shell; the outer side of the rear shell is connected to a second heat dissipation fin, which is used to transfer the heat of the rear shell to the external space of the rear shell.

[0014] Preferably, a third fan is fixed to the outer side of the rear shell, and the third fan is arranged between the front shell and the second heat dissipation fins. The air outlet of the third fan is aligned with the second heat dissipation fins, and is used to blow the air at the second heat dissipation fins to the external space of the rear shell.

[0015] According to another aspect of the embodiments of the present application, a projector is provided, comprising the optical engine as described in any of the above embodiments.

[0016] In the embodiment of the present application, a first fan is provided to blow the air in the internal space of the shell to the ventilation channel, and then the heat is dissipated to the ventilation channel through the heat dissipation component. On the one hand, the front mirror and the rear mirror can be directly dissipated through the ventilation channel. On the other hand, the air circulation in the internal space of the shell can be accelerated to avoid heat accumulation inside the shell, so as to indirectly dissipate the heat to the front mirror and the rear mirror through the internal space of the shell, thereby improving the heat dissipation efficiency of the optical machine. The first fan is provided on the first side of the shell, which can improve the utilization rate of the internal space of the optical machine while ensuring the heat dissipation efficiency of the optical machine.

[0017] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0019] Figure 1 A perspective view of an optical machine provided in an embodiment of the present application is shown;

[0020] Figure 2 A three-dimensional diagram of an optical machine from another angle provided by an embodiment of the present application is shown;

[0021] Figure 3 An exploded view of an optical engine provided by an embodiment of the present application is shown;

[0022] Figure 4 shows a front view of an optical engine provided by an embodiment of the present application;

[0023] Figure 5 The embodiment of the present application provides Figure 4 Cross-sectional view in the AA direction;

[0024] Figure 6 The embodiment of the present application provides Figure 5 Enlarged view of part B;

[0025] Figure 7 The embodiment of the present application provides Figure 5 Schematic diagram of heat flow in the optical machine;

[0026] Figure 8 Another exploded view of the optical engine provided by an embodiment of the present application is shown.

[0027] The accompanying drawings in the specific implementation manner are as follows:

[0028] 1. Optical machine;

[0029] 10. Light source assembly; 11. LED light board; 12. Front mirror; 13. Display screen; 14. Insulating glass; 15. Rear mirror;

[0030] 20. Lens assembly;

[0031] 30. Housing; 31. Front housing; 311. First side portion of the front housing; 312. Second side portion of the front housing; 32. Rear housing;

[0032] 40. Heat dissipation assembly; 41. First heat dissipation fin; 42. Second fan;

[0033] 51. First fan; 52. Third fan; 53. First baffle; 54. Second baffle; 55. First partition; 56. Second partition; 57. Air outlet guide vane; 58. Air inlet guide vane; 59. Second heat sink fin;

[0034] 60. Ventilation channel; 61. First air duct; 62. Second air duct; 63. Third air duct. DETAILED DESCRIPTION

[0035] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0037] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0038] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0039] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0040] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0041] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0042] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0043] Please refer to Figures 1 to 8 , an embodiment of the present application provides an optical machine, which includes a light source assembly 10, the light source assembly 10 includes a front mirror 12 and a rear mirror 15; a lens assembly 20, used to refract light incident from the light source assembly 10; the front mirror 12 is arranged between the lens assembly 20 and the rear mirror 15; a ventilation channel 60 is formed between the front mirror 12 and the rear mirror 15, and the optical machine 1 also includes: a shell 30, the lens assembly 20 is fixed to the front end of the shell 30, and the light source assembly 10 is connected to the rear end of the shell 30; a heat dissipation assembly 40, arranged at a first side of the shell 30, and connected to one end of the ventilation channel 60; a first fan 51, arranged at a second side inside the shell 30, the air inlet of the first fan 51 faces the internal space of the shell 30, and the air outlet of the first fan 51 is connected to the other end of the ventilation channel 60; the air in the internal space of the shell 30 passes through the ventilation channel 60 and reaches the heat dissipation assembly 40 under the rotation of the first fan 51.

[0044] Preferably, the rear mirror 15 is snap-fitted to the rear end of the housing 30 to divide the interior space of the housing 30 into a front housing 31 and a rear housing 32; the lens assembly 20 is disposed at the front end of the front housing 31, and the front mirror 12 is disposed at the rear end of the front housing 31; the light source assembly 10 further comprises: a light-emitting component disposed at the rear end of the rear housing 32 for emitting light toward the rear mirror 15; a display screen 13 disposed between the front mirror 12 and the rear mirror 15, and a first air duct 61 is formed between the front mirror 12 and the display screen 13; and a heat-insulating glass. 14, is arranged between the display screen 13 and the rear mirror 15, a second air duct 62 is formed between the insulating glass 14 and the display screen 13, and a third air duct 63 is formed between the display screen 13 and the rear mirror 15; the heat dissipation component 40 is arranged on the first side portion 311 of the front shell body, and the first fan 51 is arranged on the second side portion inside the front shell body 31. Under the rotation of the first fan 51, the air in the internal space of the front shell body 31 passes through the first air duct 61, the second air duct 62 and the third air duct 63 respectively and reaches the heat dissipation component 40.

[0045] Combine Figure 3 、 Figure 6 and Figure 7 , the heat flow inside the optical machine 1 is explained.

[0046] The LED (Light Emitting Diode) light board 11 of the optical machine 1 emits light and generates heat, which is transferred to the rear mirror 15, the insulating glass 14, the display screen 13 and the front mirror 12 in sequence. The heat of the front mirror 12 is further transferred to the internal space of the front shell 31.

[0047] According to actual test data, when the LED light board 11 of a high-power optical engine 1 is in operation, the temperature may reach 100°C, and the temperature at the front mirror 12 may reach 60°C. Currently, in the optical engine 1, heat dissipation at the LED light board 11 is designed, for example, a heat sink is installed near the LED light board 11, but there is little consideration for heat dissipation between the front mirror 12 and the rear mirror 15, especially the interior space of the front housing 31. This causes heat to accumulate inside the front housing 31, thereby reducing the heat dissipation efficiency of the LED light board 11.

[0048] The present application further considers the heat dissipation of the LED light board 11 , as well as the heat dissipation of the internal space of the front shell 31 , the front mirror 12 , the display screen 13 , the insulating glass 14 and the rear mirror 15 .

[0049] Specifically, in one aspect, the heat of the LED light board 11 is transferred to the rear housing 32, and the heat of the rear housing 32 is transferred to the second heat dissipation fins 59, so that the LED light board 11 is directly cooled based on the second heat dissipation fins 59. Preferably, a third fan 52 is further fixed to the outer side of the rear housing 32, and the third fan 52 is arranged between the front housing 31 and the second heat dissipation fins 59, and the air outlet of the third fan 52 is aligned with the second heat dissipation fins 59, as shown in FIG. Figure 7 As shown by the dotted arrow at the third fan 52 , the third fan 52 can be used to blow the air at the second heat dissipation fins 59 to the external space of the rear housing 32 to improve the heat transfer efficiency between the second heat dissipation fins 59 and the air in the external space of the rear housing 32 .

[0050] On the other hand, based on the optical machine 1 provided in the embodiment of the present application, Figure 7 As shown by the dotted arrow at the front mirror 12, the heat of the front mirror 12 is transferred to the internal space of the front shell 31; under the rotation of the first fan 51, the hot air in the internal space of the front shell 31 enters from the air inlet of the first fan 51, and then enters the ventilation channel 60 from the air outlet of the first fan 51, as shown in FIG. Figure 7 As shown by the solid arrow at the first fan 51; under the rotation of the first fan 51, further, the air in the internal space of the front housing 31 passes through the first air duct 61, the second air duct 62 and the third air duct 63, and reaches the heat dissipation component 40, as shown Figure 7 As shown by the solid arrow at the middle ventilation channel 60, the heat is then dissipated by the heat dissipation component 40.

[0051] Regarding the working process of the heat dissipation assembly 40, preferably, the heat dissipation assembly 40 includes a first heat dissipation fin 41, which passes through the first side wall of the front housing 31, partially extends into the interior of the front housing 31, and abuts between the first partition 55 and the first side wall of the front housing 31, for contacting the air in the interior space of the front housing 31 and the air outlet of the ventilation channel 60, and the other part is located in the space outside the front housing 31. Figure 7 As shown by the solid arrow at the first heat dissipation fin 41, the hot air at the outlet of the ventilation channel 60 transfers heat to the first heat dissipation fin 41, and then the first heat dissipation fin 41 transfers the heat of the hot air to the external space of the front shell 31, so as to achieve heat dissipation of the internal space of the front shell 31, the front mirror 12, the display screen 13, the insulating glass 14 and the rear mirror 15.

[0052] Furthermore, the heat dissipation assembly 40 further includes a second fan 42, which is fixed to the outside of the front housing 31 and close to the first heat dissipation fins 41. The air outlet of the second fan 42 is aligned with the first heat dissipation fins 41, and the air inlet of the second fan 42 is directed toward the external space of the front housing 31. Figure 7 As shown by the solid arrow at the second fan 42 , the second fan 42 can improve the heat transfer efficiency between the first heat dissipating fins 41 and the air outside the front housing 31 .

[0053] During the above-mentioned heat transfer process, the LED light board 11 can be directly cooled by the second heat dissipation fins 59 and the third fan 52, the air in the internal space of the front shell 31 can be cooled by the rotation of the first fan 51, and the front mirror 12, display screen 13, insulating glass 14 and rear mirror 15 can be cooled by the first fan 51, the ventilation channel 60, the first heat dissipation fins 41 and the second fan 42.

[0054] In the optical machine 1, the temperature of the internal space of the front shell 31 can be lowered to avoid heat accumulation in the internal space of the front shell 31, while improving the heat transfer efficiency between the front mirror 12 and the air in the internal space of the front shell 31, thereby improving the heat transfer efficiency between the LED light board 11 and the rear mirror 15, thereby indirectly improving the heat dissipation efficiency of the LED light board 11; in the optical machine 1, the temperature of the front mirror 12, the display screen 13, the insulating glass 14 and the rear mirror 15 can also be lowered by the air in the ventilation channel 60 to indirectly improve the heat dissipation efficiency of the LED light board 11; in the optical machine 1, the LED light board 11 can also be directly cooled by the third fan 52 and the second heat dissipation fins 59 to ensure the stability of the operation of the LED light board 11 when the optical machine 1 is performing projection.

[0055] Specifically discussing the first air duct 61, the second air duct 62 and the third air duct 63, under the action of the insulating glass 14, the temperature of the rear mirror 15 will be significantly higher than the temperature of the front mirror 12 and the display screen 13. Therefore, preferably, the two ends of the display screen 13 are respectively connected with an outlet guide plate 57 and an inlet guide plate 58; the outlet guide plate 57 has a certain arc surface and is arranged at the outlet of the air channel, and the arc shape of the outlet guide plate 57 is adapted to the bending arc shape of the connection between the rear end of the front shell 31 and the first side wall; the inlet guide plate 58 has a certain arc surface and is arranged at the outlet of the air channel, and the arc shape of the inlet guide plate 58 is adapted to the bending arc shape of the connection between the rear end of the front shell 31 and the second side wall, so as to ensure the wind speed and air volume of the air flowing in the third air duct 63 formed between the display screen 13 and the rear mirror 15 through the inlet guide plate 58 and the outlet guide plate 57.

[0056] Preferably, a first baffle 53 and a second baffle 54 are provided inside the front shell 31; the first baffle 53 and the first side wall of the front shell 31 enclose an air outlet channel opening of the ventilation channel 60, and the heat dissipation assembly 40 is fixed to the first baffle 53 for contact with the air at the air outlet channel opening; the second baffle 54 and the second side wall of the front shell 31 enclose an air inlet channel opening of the ventilation channel 60, and the first fan 51 is fixed to the second baffle 54 for blowing the air in the internal space of the front shell 31 to the ventilation channel 60, so as to improve the heat dissipation effect of the internal space of the front shell 31 through the first baffle 53 and the second baffle 54.

[0057] Preferably, a first partition fence 55 and a second partition fence 56 are further provided inside the front shell 31; the first partition fence 55 is provided at the heat dissipation assembly 40, and the heat dissipation assembly 40 is abutted between the first partition fence 55 and the side wall of the front shell 31; the second partition fence 56 is provided at the air inlet of the first fan 51, and is used to fix the first fan 51 to improve the stability of the heat dissipation assembly 40 and the first fan 51.

[0058] In the embodiment of the present application, a first fan 51 is provided to blow the air in the internal space of the shell 30 to the ventilation channel 60, and then the heat is dissipated from the ventilation channel 60 through the heat dissipation component 40. On the one hand, the front mirror 12 and the rear mirror 15 can be directly dissipated through the ventilation channel 60. On the other hand, the air circulation in the internal space of the shell 30 can be accelerated to avoid heat accumulation inside the shell 30, so as to indirectly dissipate the heat from the front mirror 12 and the rear mirror 15 through the internal space of the shell 30, thereby improving the heat dissipation efficiency of the optical machine 1. The first fan 51 is provided on the first side portion of the shell 30, which can improve the utilization rate of the internal space of the optical machine 1 while ensuring the heat dissipation efficiency of the optical machine 1.

[0059] According to another aspect of the embodiments of the present application, a projector is further provided, which includes the optical engine 1 as described in any of the above embodiments.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. An optical machine, comprising: A light source assembly, comprising a front mirror and a rear mirror; a lens assembly, configured to refract light incident from the light source assembly; The front mirror is arranged between the lens assembly and the rear mirror; It is characterized in that a ventilation channel is formed between the front mirror and the rear mirror, and the optical machine further includes: a housing, the lens assembly being fixed to the front end of the housing, and the light source assembly being connected to the rear end of the housing; a heat dissipation assembly, disposed on the first side of the housing and connected to one end of the ventilation channel; a first fan disposed at the second side portion of the housing, wherein an air inlet of the first fan faces the interior space of the housing, and an air outlet of the first fan is connected to the other end of the ventilation channel; The air in the interior space of the housing passes through the ventilation channel and reaches the heat dissipation component under the rotation of the first fan.

2. The optical machine according to claim 1, wherein: The rear mirror is clamped to the rear end of the housing to divide the interior space of the housing into a front housing and a rear housing; The lens assembly is arranged at the front end of the front shell, and the front lens is arranged at the rear end of the front shell; The light source assembly further includes: a light-emitting component, disposed at the rear end of the rear housing, for emitting light toward the rear mirror; A display screen is provided between the front mirror and the rear mirror, and a first air duct is formed between the front mirror and the display screen; Insulating glass is provided between the display screen and the rearview mirror, a second air duct is formed between the insulating glass and the display screen, and a third air duct is formed between the display screen and the rearview mirror; The heat dissipation assembly is arranged on the first side of the front shell, and the first fan is arranged on the second side of the front shell. Under the rotation of the first fan, the air in the internal space of the front shell passes through the first air duct, the second air duct and the third air duct respectively and reaches the heat dissipation assembly.

3. The optical machine according to claim 2, wherein: A first baffle and a second baffle are provided inside the front housing; The first baffle and the first side wall of the front housing enclose an air outlet of the ventilation channel, and the heat dissipation assembly is fixed to the first baffle for contacting with air at the air outlet; The second baffle and the second side wall of the front shell together form an air inlet of the ventilation channel. The first fan is fixed to the second baffle and is used to blow air in the interior space of the front shell toward the ventilation channel.

4. The optical machine according to claim 3, wherein: The front shell is further provided with a first partition and a second partition; The first partition is provided at the heat dissipation assembly, and the heat dissipation assembly abuts between the first partition and the side wall of the front housing; The second barrier is arranged at the air inlet of the first fan and is used to fix the first fan.

5. The optical machine according to claim 4, wherein: The heat dissipation assembly includes a first heat dissipation fin, which passes through the first side wall of the front shell, partially extends into the interior of the front shell, and abuts between the first partition and the first side wall of the front shell, and is used to contact the air in the internal space of the front shell and the air outlet of the ventilation channel, and the other part is located in the external space of the front shell.

6. The optical machine according to claim 5, characterized in that: The heat dissipation assembly also includes a second fan, which is fixed outside the front shell and close to the first heat dissipation fins. The air outlet of the second fan is aligned with the first heat dissipation fins, and the air inlet of the second fan faces the external space of the front shell.

7. The optical machine according to claim 3, wherein: The two ends of the display screen are respectively connected with an air outlet guide plate and an air inlet guide plate; The air outlet guide plate has a certain arc surface and is arranged at the air outlet channel opening, and the arc shape of the air outlet guide plate is adapted to the curved arc shape at the connection between the rear end of the front housing and the first side wall; The air inlet guide plate has a certain arc surface and is arranged at the air inlet channel opening, and the arc surface shape of the air inlet guide plate is adapted to the bending arc shape of the connection between the rear end of the front shell and the second side wall.

8. The optical machine according to claim 2, wherein: The light-emitting component includes an LED light board, which is arranged at the rear wall of the rear housing and is used to transfer the heat of the LED light board to the rear housing; The outer side of the rear housing is connected to a second heat dissipation fin, and the second heat dissipation fin is used to transfer the heat of the rear housing to the external space of the rear housing.

9. The optical machine according to claim 8, wherein: A third fan is also fixed to the outer side of the rear shell. The third fan is arranged between the front shell and the second heat dissipation fins. The air outlet of the third fan is aligned with the second heat dissipation fins to blow the air at the second heat dissipation fins to the external space of the rear shell.

10. A projector, characterized in that: Comprising the optical machine as described in any one of claims 1 to 9.

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