Projection light machine and projection equipment

Abstract

The utility model relates to a projection light machine and projection equipment. The projection ray machine comprises a shell, wherein an accommodating cavity is formed in the shell; the optical assembly comprises a light path propagation assembly and a lens module, the light path propagation assembly comprises a reflector located in the containing cavity, and the lens module penetrates through the side wall of the shell; the heat dissipation structure comprises a first heat dissipation piece, the first heat dissipation piece comprises a heat absorption part and a heat dissipation part, the heat absorption part is arranged in the containing cavity and located on the side, away from the lens module, of the reflector, and the heat dissipation part is arranged on the side, away from the lens module, of the shell; the first fan is arranged in the accommodating cavity and is positioned between the reflecting mirror and the heat dissipation part; the first fan is provided with a first air inlet end, and the first air inlet end faces the heat absorption part. The radiating and cooling effects of the ray machine can be improved, so that the power and the brightness of the projection ray machine can be greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of projection equipment, in particular to a projection light machine and a projection equipment. BACKGROUND

[0002] A projector is an electronic device that can convert an image or a video signal into a visual image and project it through a lens system. It has been widely used in demonstrations and home theaters. Different projectors use different imaging technologies, among which the most common is a single-chip liquid crystal projector that uses liquid crystal display technology for imaging.

[0003] The projector mainly includes a light machine, an imaging system and a control system. The light machine is the core of the entire projector, including a light source, a liquid crystal screen, a light path element and the like. The early light machine adopts an open design. In the process of heat dissipation, dust in the air inevitably enters the inside of the light path, resulting in poor projection effect and shortening the service life of the projector. In contrast, the light path structure of the fully sealed light machine is closed and independent, which can greatly enhance the dustproof effect.

[0004] In order to solve the problem of heat dissipation of the liquid crystal screen after the light machine is sealed, the current fully sealed light machine usually uses a built-in turbine fan inside the light machine for internal circulation heat dissipation, and configures a heat exchanger and the like to realize cooling. However, the heat dissipation effect of the current fully sealed light machine is limited, which greatly limits the brightness and power of the light machine. CONTENT OF THE INVENTION

[0005] Therefore, the present application provides a projection light machine and a projection equipment, which can improve the heat dissipation and cooling effect of the light machine, thereby greatly improving the power and brightness of the projection light machine.

[0006] In a first aspect, the present application provides a projection light machine, which comprises:

[0007] A housing, the housing has a containing cavity inside;

[0008] An optical assembly, the optical assembly comprises a light path propagation assembly and a lens module, the light path propagation assembly comprises a reflecting mirror located in the containing cavity, and the lens module is arranged on the side wall of the housing;

[0009] A heat dissipation structure, the heat dissipation structure comprises a first heat dissipation member, the first heat dissipation member comprises a heat absorption part and a heat dissipation part, the heat absorption part is arranged in the containing cavity and located on the side of the reflecting mirror away from the lens module, and the heat dissipation part is arranged on the side of the housing away from the lens module;

[0010] A first fan, the first fan is arranged in the containing cavity and located between the reflecting mirror and the heat dissipation part; the first fan has a first air inlet end, and the first air inlet end faces the heat absorption part.

[0011] In one of the embodiments, the light path propagation assembly comprises a plurality of light path propagation structures arranged along the first direction.

[0012] The mirror has opposite first and second ends, and the distance between the mirror and the lens module in the second direction gradually increases from the first end to the second end; the second direction is perpendicular to and coplanar with the first direction.

[0013] The heat absorption portion comprises a plurality of first fins arranged at intervals, the first fins have opposite third and fourth ends, the third end is close to the first end, and the fourth end is close to the second end; the cross-sectional area of the first fin gradually decreases from the third end to the fourth end; the cross section is a plane perpendicular to the first direction.

[0014] In one of the embodiments, the first heat dissipation member further comprises a first heat conduction structure connecting the heat absorption portion and the heat dissipation portion.

[0015] In one of the embodiments, at least part of the first fins on the side away from the mirror is connected to the heat dissipation portion.

[0016] In one of the embodiments, the heat absorption portion further comprises a first bottom plate, and the plurality of first fins are arranged at intervals on the first bottom plate.

[0017] The heat dissipation portion comprises a second bottom plate and a plurality of second fins arranged at intervals on the surface of the second bottom plate, one end of the first heat conduction structure is connected to the first bottom plate, and the other end is connected to the second bottom plate.

[0018] In one of the embodiments, the first heat conduction structure comprises a heat conduction plate, and the first heat dissipation member further comprises a plurality of third fins arranged at intervals on the surface of the heat conduction plate and the first bottom plate away from the first fins.

[0019] In one of the embodiments, the first heat conduction structure comprises a heat conduction member, the heat conduction member comprises a first heat conduction portion, a second heat conduction portion and a third heat conduction portion, the first heat conduction portion is arranged at the end of the first fin away from the heat dissipation portion along the arrangement direction of the first fin, one end of the second heat conduction portion and one end of the third heat conduction portion are respectively connected to the opposite ends of the first heat conduction portion, and the end of the second heat conduction portion and the end of the third heat conduction portion away from the first heat conduction portion are connected to the heat dissipation portion.

[0020] In one of the embodiments, the first fan is located between the heat absorption portion and the heat dissipation portion; or, the first fan is located between the heat absorption portion and the mirror.

[0021] In one of the embodiments, the optical assembly further comprises a light source, the heat dissipation structure further comprises a second heat dissipation member for dissipating heat of the light source, and the projector further comprises a second fan, the second fan has a second air inlet end and a second air outlet end.

[0022] The second air inlet end faces the second heat dissipation member, and the second air outlet end is away from the second heat dissipation member; or the second air inlet end is away from the second heat dissipation member, and the second air outlet end faces the second heat dissipation member.

[0023] In a second aspect, the present application provides a projection device, which comprises the projection engine described in the first aspect.

[0024] The projection engine and the projection device described above can circulate and agitate the air inside the shell through the first air fan, so that the heat carried by the air is absorbed by the heat absorption part, thereby achieving cooling of the air inside the shell. The heat absorption part and the first air fan are arranged on the side of the reflecting mirror away from the lens module, which can increase the volume of the heat absorption part, improve the heat dissipation efficiency of the projection engine, and make the airflow flow through the space on the side of the reflecting mirror close to the lens module. At the same time, the first air fan is located between the reflecting mirror and the heat dissipation part, and the first air fan has a first air inlet end facing the heat absorption part, so that the air circulating in the shell can pass through the heat absorption part as much as possible, further improving the heat dissipation effect and efficiency of the projection engine. On the other hand, while improving the heat dissipation effect and efficiency of the projection engine, the present application can reduce the height of the projection engine, making the overall shape of the projection engine more flat, and more suitable for horizontal projection engines. Therefore, the present application can greatly improve the heat dissipation and cooling effect and efficiency of the projection engine, so as to greatly improve the power and brightness of the projection engine by increasing the power. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 A structural schematic diagram of the projection engine provided by the embodiment of the present application.

[0026] Figure 2 A schematic diagram of an air duct of the projection engine provided by the embodiment of the present application.

[0027] Figure 3 A structural schematic diagram of the first heat dissipation member provided by the embodiment of the present application.

[0028] Figure 4 Another structural schematic diagram of the projection engine provided by the embodiment of the present application.

[0029] Figure 5 Another schematic diagram of an air duct of the projection engine provided by the embodiment of the present application.

[0030] Figure 6 Another structural schematic diagram of the first heat dissipation member provided by the embodiment of the present application.

[0031] Figure 7 Another structural schematic diagram of the projection engine provided by the embodiment of the present application.

[0032] Figure 8Another structure diagram of the air duct of the projection light machine provided by the embodiment of the present application.

[0033] Figure 9 Another structure diagram of the first heat dissipation member provided by the embodiment of the present application.

[0034] Figure 10 Another structure diagram of the projection light machine provided by the embodiment of the present application.

[0035] Figure 11 Another structure diagram of the air duct of the projection light machine provided by the embodiment of the present application.

[0036] Figure 12 Another structure diagram of the first heat dissipation member provided by the embodiment of the present application.

[0037] Figure 13 Another structure diagram of the projection light machine provided by the embodiment of the present application.

[0038] Figure 14 Another structure diagram of the air duct of the projection light machine provided by the embodiment of the present application.

[0039] Figure 15 Another structure diagram of the first heat dissipation member provided by the embodiment of the present application.

[0040] Figure 16 Another structure diagram of the projection light machine provided by the embodiment of the present application.

[0041] Figure 17 Another structure diagram of the air duct of the projection light machine provided by the embodiment of the present application.

[0042] Reference signs

[0043] 1 - housing; 2 - lens module; 31 - first heat dissipation member; 311 - heat absorbing part; 312 - heat dissipation part; 41 - first fan; 51 - front Fresnel lens; 52 - heat insulation glass; 53 - liquid crystal screen; 54 - rear Fresnel lens; 55 - reflecting mirror; S1 - internal circulation air duct; A - first direction; B - second direction; 551 - first end; 552 - second end; 3111 - first fin; 3111a - third end; 3111b - fourth end; 313 - first heat conduction structure; 3112 - first bottom plate; 3121 - second bottom plate; 3122 - second fin; 3131 - heat conduction plate; 314 - third fin; 3132 - heat conduction member; 6 - light source; 56 - light collecting rod; S2 - system circulation air duct; 32 - second heat dissipation member; 42 - second fan; 321 - fourth fin; 322 - second heat conduction structure. DETAILED DESCRIPTION

[0044] In order to make the above objectives, features and advantages of the present application more clear and comprehensible, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different ways beyond the specific embodiments described herein and by one of ordinary skill in the art without departing from the spirit and scope of the present application, and it is therefore intended that all such variations be considered as falling within the scope of the present application. It should be understood that the use of the terms "include", "comprise" or "contain" herein should not be understood as limiting the present application to the features or steps described herein, but rather the use of these terms is intended to cover the presence of the features or steps described herein as well as the presence of other features or steps not described herein.

[0045] In the description of the present application, it should be understood that, if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0046] In addition, if these terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features referred to. Therefore, the features defined with "first", "second" can include at least one of the features explicitly or implicitly. In the description of the present application, if the term "a plurality of" appears, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0047] In the present application, unless otherwise specifically defined and limited, if the terms "mount", "connect", "connect", "fix" and the like appear, these terms should be interpreted broadly. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication or interaction relationship of two elements, unless otherwise specifically limited. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0048] In the present application, unless specifically stated and limited otherwise, if there is a description of a first feature "on" or "under" a second feature, etc., it can mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "over", "above" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only means that the first feature is higher in horizontal height than the second feature. The first feature "under", "below" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only means that the first feature is lower in horizontal height than the second feature.

[0049] It should be noted that if an element is referred to as being "fixed" or "set" to another element, it can be directly on the other element or there can be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there can be an intermediate element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are only for illustrative purposes and do not represent the only implementation.

[0050] In the current market, the heat dissipation fins for heat dissipation of the light engine of the projector product are relatively small, and the circulating heat dissipation capacity of the light engine is limited, so that the heat in the light engine cannot be quickly dissipated, resulting in that the optical elements in the light engine are in a high temperature environment, and the maximum power and brightness of the light engine are greatly limited. At the same time, in the current light engine of the projector, the space between the lens and the liquid crystal screen does not enter the circulating heat dissipation air path, and if the light engine is not tightly sealed or there is moisture, the lens or mirror surface is easy to fog when starting in a humid environment, resulting in unclear projection image. In addition, for the horizontal light engine, there is no heat dissipation structure designed for the form of the horizontal light engine.

[0051] Based on this, the embodiments of the present application provide a projection light engine and a projection device, which can improve the heat dissipation and cooling effect of the light engine, so as to greatly improve the power and brightness of the projection light engine.

[0052] The following will be described in detail in combination with the drawings and specific embodiments.

[0053] Figure 1 A structural schematic diagram of the projection light engine provided by the embodiments of the present application. Figure 2 A schematic diagram of an air duct of the projection light engine provided by the embodiments of the present application. Figure 3 A structural schematic diagram of a first heat dissipation member provided by the embodiments of the present application. Figure 4 Another structural schematic diagram of the projection light engine provided by the embodiments of the present application. Figure 5 Another schematic diagram of an air duct of the projection light engine provided by the embodiments of the present application.Figure 6 Another structure diagram of the first heat dissipation member provided by an embodiment of the present application. Figure 7 Another structure diagram of the projection optical engine provided by an embodiment of the present application. Figure 8 Another air duct diagram of the projection optical engine provided by an embodiment of the present application. Figure 9 Another structure diagram of the first heat dissipation member provided by an embodiment of the present application. Figure 10 Another structure diagram of the projection optical engine provided by an embodiment of the present application. Figure 11 Another air duct diagram of the projection optical engine provided by an embodiment of the present application. Figure 12 Another structure diagram of the first heat dissipation member provided by an embodiment of the present application. Figure 13 Another structure diagram of the projection optical engine provided by an embodiment of the present application. Figure 14 Another air duct diagram of the projection optical engine provided by an embodiment of the present application. Figure 15 Another structure diagram of the first heat dissipation member provided by an embodiment of the present application. Figure 16 Another structure diagram of the projection optical engine provided by an embodiment of the present application. Figure 17 Another air duct diagram of the projection optical engine provided by an embodiment of the present application.

[0054] As shown in Figures 1-17 An embodiment of the present application provides a projection optical engine, which comprises: a shell 1, the shell 1 having a containing cavity; an optical assembly, the optical assembly comprising a light path propagation assembly and a lens module 2, the light path propagation assembly comprising a mirror 55 located in the containing cavity, and the lens module 2 penetrating a side wall of the shell 1; a heat dissipation structure, the heat dissipation structure comprising a first heat dissipation member 31, the first heat dissipation member 31 comprising a heat absorbing part 311 and a heat dissipation part 312, the heat absorbing part 311 being arranged in the containing cavity and located at a side of the mirror 55 away from the lens module 2, and the heat dissipation part 312 being arranged at a side of the shell 1 away from the lens module 2; and a first fan 41, the first fan 41 being arranged in the containing cavity and located between the mirror 55 and the heat dissipation part 312, and the first fan 41 having a first air inlet end, the first air inlet end being directed to the heat absorbing part 311.

[0055] From the above composition structure of the projection optical engine, it can be seen that Figures 1-17As shown, in the projection light machine, the light rays can be adjusted by the light path propagation assembly, and finally projected and imaged by the lens module 2. The projection light machine generates heat during operation, causing the temperature inside the shell 1 to rise. The shell 1 has a containing cavity, and the mirror 55 in the light path propagation assembly is located in the containing cavity. The high temperature inside the shell 1 can cause damage to the light path propagation assembly, affecting the brightness and power of the projection light machine. The containing cavity of the shell 1 is also provided with the heat absorption part 311 of the first fan 41 and the first heat dissipation part 31. In specific implementation, under the agitation of the first fan 41, the air inside the shell 1 can circulate and flow through the heat absorption part 311, and the heat carried by the air can be absorbed by the heat absorption part 311, achieving cooling of the air inside the shell 1 and reducing the temperature of the light path propagation assembly inside the shell 1, thereby providing a suitable temperature working environment for the light path propagation assembly inside the shell 1. Since the space on the side of the mirror 55 away from the lens module 2 is large, the heat absorption part 311 is arranged on the side of the mirror 55 away from the lens module 2. The volume of the heat absorption part 311 can be increased, the contact area between the heat absorption part 311 and the air inside the shell 1 can be increased, and the heat dissipation efficiency of the projection light machine can be improved. The first fan 41 is arranged on the side of the mirror 55 away from the lens module 2. When the first fan 41 agitates the air inside the shell 1, the airflow can flow through the space on the side of the mirror 55 close to the lens module 2. When the projection light machine is not tightly sealed or there is water vapor, and when it is started in a humid environment, the water mist on the surface of the lens module 2 and the surface of the mirror 55 can be carried away by the circulating airflow in time, solving the problem of unclear projection picture caused by fogging on the surface of the lens module 2 and the surface of the mirror 55. The heat dissipation efficiency of the projection light machine is further improved, and the projection quality is improved.

[0056] Further, as Figures 1-17As shown, the first fan 41 is located between the reflector 55 and the heat dissipation part 312, and the first air inlet end of the first fan 41 faces the heat absorption part 311, so that the air circulating in the shell 1 can pass through the heat absorption part 311 as much as possible, the heat absorption part 311 can be in contact with the air in the shell 1 to absorb the heat carried by the air, and the cold air can also continue to circulate in the shell 1 through the disturbance of the first fan 41 after the heat in the air is absorbed by the heat absorption part 311, thereby further improving the heat dissipation effect and efficiency of the projection light machine. On the other hand, in the embodiment of the present application, the heat absorption part 311 and the first fan 41 are arranged on the side of the reflector 55 away from the lens module 2, and the first fan 41 is located between the reflector 55 and the heat dissipation part 312, and the first air inlet end faces the heat absorption part 311, which can reduce the height of the projection light machine while improving the heat dissipation effect and efficiency of the projection light machine, so that the overall shape of the projection light machine is more flat, and more suitable for horizontal projection light machines. In addition, the first heat dissipation part 31 also has a heat dissipation part 312, which is arranged in the external space on the side of the shell 1 away from the lens module 2, and the heat absorbed by the heat absorption part 311 can be transmitted to the outside of the shell 1 through the heat dissipation part 312 and carried away by the external cold air, which is beneficial to realize the circulating heat dissipation of the projection light machine.

[0057] Therefore, the embodiment of the present application can greatly improve the heat dissipation effect and efficiency of the projection light machine, so that the power and brightness of the projection light machine can be greatly improved by increasing the power.

[0058] As a possible implementation manner, as shown in Figure 1 、 Figure 4 、 Figure 7 、 Figure 10 、 Figure 13 and Figure 16 , the light path propagation assembly includes a plurality of light path propagation structures arranged along the first direction A, and part of the light path propagation structures are located in the accommodation cavity.

[0059] Further, as shown in Figures 1-2 、 Figures 4-5 、 Figures 7-8 、 Figures 10-11 、 Figures 13-14 and Figure 17As shown, the light path propagation assembly can include a front Fresnel lens 51, a heat insulation glass 52, a liquid crystal screen 53, a rear Fresnel lens 54 and a mirror 55 arranged in the accommodating cavity along the first direction A, and the light path propagation assembly and the shell 1 form an internal circulating air duct S1. The first air fan 41 further includes a first air outlet end. The air flowing through the heat absorption part 311 enters the first air inlet end of the first air fan 41, is discharged from the first air outlet end, passes through the cavity between the front Fresnel lens 51 and the heat insulation glass 52, the cavity between the heat insulation glass 52 and the liquid crystal screen 53, the cavity between the liquid crystal screen 53 and the rear Fresnel lens 54, and then enters the cavity between the rear Fresnel lens 54 and the mirror 55, carries away the heat inside the shell 1, and then enters the heat absorption part 311 for cooling. The cooled air enters the first air inlet end of the first air fan 41, so as to realize the air path circulation.

[0060] The front Fresnel lens 51 is mainly used for collimating and shaping the incident light; the heat insulation glass 52 is attached with a polarization film, which can transmit the polarization light used for liquid crystal control for imaging and reflect the light not used; the liquid crystal screen 53 can be regarded as a light valve device, which controls the passing amount of light of different colors according to the input signal to achieve the desired image; the rear Fresnel lens 54 is mainly used for converging the light emitted from the liquid crystal screen 53; and the mirror 55 can reflect the light emitted from the rear Fresnel lens 54 to the lens module 2.

[0061] In some examples, as shown in FIG. 1, Figures 1-17 As shown, the mirror 55 has opposite first and second ends 551 and 552, and the distance between the mirror 55 and the lens module 2 in the second direction B gradually increases from the first end 551 to the second end 552; the second direction B is perpendicular to and coplanar with the first direction A; the heat absorption part 311 includes a plurality of first fins 3111 arranged at intervals, and each first fin 3111 has opposite third and fourth ends 3111a and 3111b, the third end 3111a is close to the first end 551, and the fourth end 3111b is close to the second end 552; the cross-sectional area of the first fin 3111 gradually decreases from the third end 3111a to the fourth end 3111b; and the cross section is a plane perpendicular to the first direction A.

[0062] Based on this, as shown in FIG. 1, Figures 1-17As shown, the heat absorption part 311 can be a fin heat exchanger, and the plurality of first fins 3111 arranged at intervals can exchange heat with the air flowing through the heat absorption part 311, thereby increasing the contact area between the heat absorption part 311 and the air. The reflector 55 is arranged obliquely inside the shell 1 compared to the lens module 2, and from the first end 551 to the second end 552 of the reflector 55, the reflector 55 gradually moves away from the lens module 2 in the second direction B. Similarly, from the third end 3111a to the fourth end 3111b of the reflector 55, the cross-sectional area of the first fin 3111 has a gradually decreasing trend, which matches the obliquely arranged reflector 55, fully utilizes the space on the side of the reflector 55 away from the lens module 2, greatly increases the contact area between the first fin 3111 and the air inside the shell 1, and further improves the cooling effect and efficiency of the projection light machine.

[0063] Further, as shown in Figures 1-17 from the third end 3111a to the fourth end 3111b, the cross-sectional area of the first fin 3111 can remain unchanged, continue to decrease, or increase, and so on. Before the cross-sectional area of the first fin 3111 gradually decreases, it can also remain unchanged, continue to decrease, or increase, and so on. Here, only examples are given, and are not specifically limited.

[0064] As a possible implementation, as shown in Figures 1-17 the first heat dissipation member 31 further includes a first heat conduction structure 313 connecting the heat absorption part 311 and the heat dissipation part 312.

[0065] Based on this, as shown in Figures 1-17 the heat absorbed by the heat absorption part 311 located in the accommodation cavity can be transmitted to the heat dissipation part 312 located outside the shell 1 through the first heat conduction structure 313, and carried away by the cold air outside the shell 1, so that the heat absorption part 311 can continuously absorb the heat carried by the air inside the shell 1, continuously dissipate heat inside the shell 1, and the air in the shell 1 can be cooled in time when flowing through the heat absorption part 311, and then enter the first fan 41 to circulate, further improving the cooling effect and efficiency of the projection light machine; at the same time, the arrangement of the heat absorption part 311 and the heat dissipation part 312 inside the shell 1 is more diversified.

[0066] As a possible implementation, as shown in Figures 10-15 at least part of the first fin 3111 away from the reflector 55 is connected with the heat dissipation part 312.

[0067] Based on this, as shown in Figures 10-15As shown, the heat absorption part 311 can also be directly connected with the first heat dissipation part 312, so that the heat absorbed by the heat absorption part 311 can be directly transmitted to the heat dissipation part 312 located outside the shell 1 and taken away by the cold air outside the shell 1, so that the heat absorption part 311 can continuously absorb the heat carried by the air inside the shell 1, continuously dissipate heat inside the shell 1, and the air inside the shell 1 can be cooled in time when flowing through the heat absorption part 311 and then enter the first fan 41 for circulation, further improving the heat dissipation effect and efficiency of the projection light machine.

[0068] Further, as shown in Figures 1-9 and Figures 16-17 , the connection between the heat absorption part 311 and the heat dissipation part 312 can be realized only by the first heat conduction structure 313, or only by the direct contact between the at least part of the first fins 3111 and the heat dissipation part 312, as shown in Figures 10-15 , or the connection between the heat absorption part 311 and the heat dissipation part 312 can be realized by the first heat conduction structure 313 and the direct contact between the first fins 3111 and the heat dissipation part 312 at the same time, further improving the heat conduction efficiency.

[0069] As a possible implementation manner, as shown in Figures 1-9 and Figures 16-17 , the heat absorption part 311 further comprises a first bottom plate 3112, and the plurality of first fins 3111 are arranged on the first bottom plate 3112 in a spaced manner; as shown in Figures 1-17 , the heat dissipation part 312 comprises a second bottom plate 3121 and a plurality of second fins 3122 arranged on the surface of the second bottom plate 3121 in a spaced manner.

[0070] Based on this, as shown in Figures 1-9 and Figures 16-17 , the first fins 3111 can be fixed on the first bottom plate 3112 and arranged on the first bottom plate 3112 in a spaced manner, and the first bottom plate 3112 can guide the air flowing through the first fins 3111 to flow to the first air inlet end of the first fan 41 after passing through the first fins 3111. As shown in Figures 1-17 , the heat dissipation part 312 can comprise a second bottom plate 3121 and a plurality of second fins 3122 fixed on the second bottom plate 3121, and the plurality of second fins 3122 are arranged on the second bottom plate 3121 in a spaced manner. The second bottom plate 3121 can be lapped on the side of the shell 1 away from the lens module 2, so that the shell 1, the lens module 2 and the second bottom plate 3121 can form a closed containing cavity, which can play a dustproof role and is also conducive to the circulation of air in the containing cavity.

[0071] Further, as shown in Figures 10-15As shown, the connection between the heat absorbing part 311 and the heat dissipating part 312 can be achieved by direct contact between at least part of the first fins 3111 and the surface of the second bottom plate 3121 facing away from the second fins 3122.

[0072] In addition, as Figures 10-15 As shown, the first bottom plate 3112 can also not be provided when the heat absorbing part 311 and the heat dissipating part 312 are in direct contact. At this time, at least part of the first fins 3111 are fixed to the surface of the second bottom plate 3121 facing away from the second fins 3122.

[0073] In some examples, the first fins 3111 can adopt a thin fin structure, further increasing the heat exchange area of the heat absorbing part 311, thereby further improving the heat dissipation effect and efficiency of the projection light machine.

[0074] In some examples, the number of the first fins 3111 can also be increased, and / or the distance between two adjacent first fins 3111 in the arrangement direction thereof can be reduced, further increasing the heat exchange area of the heat absorbing part 311, thereby further improving the heat dissipation effect and efficiency of the projection light machine.

[0075] In some examples, the second fins 3122 can also adopt a thin fin structure, further increasing the heat exchange area of the heat dissipating part 312, thereby further improving the heat dissipation effect and efficiency of the projection light machine.

[0076] In some examples, the number of the second fins 3122 can also be increased, and / or the distance between two adjacent second fins 3122 in the arrangement direction thereof can be reduced, further increasing the heat exchange area of the heat dissipating part 312, thereby further improving the heat dissipation effect and efficiency of the projection light machine.

[0077] In some examples, the number of the first fins 3111 can be greater than the number of the second fins 3122, and / or the thickness of the first fins 3111 in the arrangement direction thereof can be less than the thickness of the second fins 3122 in the arrangement direction thereof, and / or the distance between two adjacent first fins 3111 in the arrangement direction thereof can be less than the distance between two adjacent second fins 3122 in the arrangement direction thereof, further increasing the heat exchange area of the heat absorbing part 311, thereby further improving the heat dissipation effect and efficiency of the projection light machine.

[0078] For example, the material of the first fins 3111, the second fins 3122, the first bottom plate 3112 and the second bottom plate 3121 can be at least one or more of silver, copper, aluminum, tungsten, platinum and other metals, or an alloy such as brass. For example, the material of the first fins 3111, the second fins 3122, the first bottom plate 3112 and the second bottom plate 3121 can be aluminum, which is only an example and is not specifically limited.

[0079] As a possible implementation manner, as shown in Figures 1-17 One end of the first heat conduction structure 313 is connected to the first bottom plate 3112, and the other end is connected to the second bottom plate 3121. At this time, the heat absorbed by the first fin 3111 can be conducted to the first heat conduction structure 313 through the first bottom plate 3112, the first heat conduction structure 313 conducts the heat to the second bottom plate 3121, and then the second bottom plate 3121 conducts the heat to the second fin 3122 located outside the shell 1. When the external cold air flows through the second fin 3122, the heat can be taken away, further realizing the circulating heat dissipation of the projection light machine.

[0080] In some examples, as shown in Figures 1-6 The first heat conduction structure 313 can include a heat conduction plate 3131, one end of the heat conduction plate is connected to the first bottom plate 3112, and the other end is connected to the second bottom plate 3121.

[0081] Based on this, as shown in Figures 1-6 Both ends of the heat conduction plate 3131 are connected to the first bottom plate 3112 and the second bottom plate 3121 respectively, so that the heat absorbed by the first fin 3111 can be conducted to the second bottom plate 3121 for heat dissipation through the shortest distance after being conducted to the first bottom plate 3112. This improves the heat conduction efficiency, thereby further improving the heat dissipation efficiency of the projection light machine; at the same time, the size of the projection light machine can be reduced under the premise of ensuring the heat dissipation effect, and the projection light machine with smaller size can be adapted.

[0082] For example, the heat conduction plate 3131 can be a sheet metal part. Further, the material of the sheet metal part can be at least one or more of silver, copper, aluminum, tungsten, platinum and other metals, or can be an alloy such as brass, which is only an example and is not specifically limited. In addition, when the material of the heat conduction plate 3131 is copper or aluminum, the cost of the projection light machine can be reduced.

[0083] In some examples, as shown in Figures 4-6 The first heat dissipation part 31 further includes a plurality of third fins 314, and the plurality of third fins 314 are arranged at intervals between the surfaces of the heat conduction plate 3131 and the first bottom plate 3112 away from the first fin 3111.

[0084] Based on this, as shown in Figures 4-6As shown, when the first heat-conductive structure 313 comprises the heat-conductive plate 3131, and when the space of the projection light machine is sufficient, a plurality of third fins 314 can be arranged on the surface of the heat-conductive plate 3131 and the side of the first bottom plate 3112 away from the first fin 3111, so that part of the heat absorbed by the first fin 3111 can be conducted to the heat-dissipating part 312 through the first bottom plate 3112 and the heat-conductive plate 3131, and the other part of the heat can be conducted to the third fin 314 through the first bottom plate 3112 and directly taken away by the external cold air, thereby further improving the heat-dissipating efficiency and heat-dissipating effect of the projection light machine.

[0085] For example, the shell 1 can be provided with a avoiding slot near the side of the heat-conductive plate 3131 and the first bottom plate 3112, so that the third fin 314 can be exposed outside the shell 1. In addition, the external cold air can also directly take away at least part of the heat on the first bottom plate 3112, thereby further improving the heat-dissipating efficiency and heat-dissipating effect of the projection light machine.

[0086] For example, the third fin 314 can also adopt a thin fin structure, thereby further increasing the heat exchange area with the external cold air, and further improving the heat-dissipating effect and heat-dissipating efficiency of the projection light machine.

[0087] For example, the number of the third fin 314 can also be increased, and / or the distance between two adjacent third fins 314 in the arrangement direction thereof can be reduced, thereby further increasing the heat exchange area with the external cold air, and further improving the heat-dissipating effect and heat-dissipating efficiency of the projection light machine.

[0088] For example, the arrangement directions of the first fin 3111, the second fin 3122 and the third fin 314 can be the same or different, which is only an example and is not specifically limited.

[0089] For example, the material of the third fin 314 can be at least one or more of silver, copper, aluminum, tungsten, platinum and the like, or can be an alloy such as brass; for example, the material of the third fin 314 can be aluminum, which is only an example and is not specifically limited.

[0090] In some examples, as shown in FIG. 13, the first heat-conductive structure 313 can comprise a heat-conductive part 3132. Figures 7-17

[0091] For example, the heat-conductive part 3132 can be a heat-conductive pipe, which has a high heat-conducting coefficient and can efficiently conduct the heat of the heat-absorbing part 311 to the heat-dissipating part 312, thereby further improving the heat-dissipating effect and heat-dissipating efficiency of the projection light machine.

[0092] For example, as shown in FIG. 13, the first heat-conductive structure 313 can comprise a heat-conductive part 3132. Figures 7-9 ​As shown, one end of the heat conductor 3132 can be connected to the surface of the first bottom plate 3112 facing away from the first fin 3111 , and the other end can be connected to the surface of the second bottom plate 3121 facing away from the second fin 3122 .

[0093] For example, Figures 7-17 As shown, the first heat-conducting structure 313 may include multiple heat-conducting parts 3132, and the heat absorbed by the heat-absorbing part 311 may be conducted to the heat-dissipating part 312 through the multiple heat-conducting parts 3132; the number and arrangement of the heat-conducting parts 3132 may be adjusted according to actual production, and the embodiments of the present application are not limited to this.

[0094] In some examples, such as Figures 10-15 As shown, the heat conducting member 3132 includes a first heat conducting portion, a second heat conducting portion and a third heat conducting portion (not shown in the figure), the first heat conducting portion is arranged along the arrangement direction of the first fins 3111 at an end of the first fins 3111 away from the heat dissipation portion 312, one end of the second heat conducting portion and one end of the third heat conducting portion are respectively connected to the opposite ends of the first heat conducting portion, and the ends of the second heat conducting portion and the third heat conducting portion facing away from the first heat conducting portion are connected to the heat dissipation portion 312.

[0095] Based on this, the first heat conducting part, the second heat conducting part and the third heat conducting part are connected, and the first heat conducting part passes through the end of each first fin 3111 away from the heat dissipation part 312 along the arrangement direction of the first fins 3111, so that at least part of the heat absorbed by the area of ​​the first fin 3111 farther away from the heat dissipation part 312 can be conducted to the first heat conducting part with a higher thermal conductivity coefficient. The two ends of the first heat conducting part are respectively connected to the second heat conducting part and the third heat conducting part, and the other ends of the second heat conducting part and the third heat conducting part are connected to the heat dissipation part 312, so that the heat conducted to the first heat conducting part can be conducted to the heat dissipation part 312 through the second heat conducting part and the third heat conducting part for dissipation, thereby realizing efficient heat conduction from the heat absorbing part 311 to the heat dissipation part 312, further improving the heat dissipation effect and efficiency of the projection optical machine.

[0096] Exemplarily, ends of the second heat conducting portion and the third heat conducting portion facing away from the first heat conducting portion may be connected to the second bottom plate 3121 of the heat dissipation portion 312 .

[0097] Exemplarily, the heat conducting member 3132 may further include a fourth heat conducting portion (not shown in the figure), which is fixed to the surface of the second base plate 3121 on one side facing away from the second fin 3122, and the two ends of the fourth heat conducting portion are respectively connected to the second heat conducting portion and the end of the third heat conducting portion facing away from the first heat conducting portion, thereby achieving efficient heat conduction from the heat absorbing portion 311 to the heat dissipating portion 312 and improving the connection strength between the heat absorbing portion 311 and the heat dissipating portion 312, thereby further improving the heat dissipation effect, heat dissipation efficiency and structural stability of the projector.

[0098] For example,Figures 10-15 As shown, the first heat-conducting structure 313 can include a plurality of heat-conducting members 3132, and the first heat-conducting portions of the plurality of heat-conducting members 3132 can be arranged at the end of the first fin 3111 away from the heat-dissipating portion 312. In this way, the heat at the end of the first fin 3111 away from the heat-dissipating portion 312 can be uniformly and efficiently conducted to the heat-dissipating portion 312, further improving the heat-dissipating effect and efficiency of the projection light machine. At this time, the number and specific arrangement of the heat-conducting members 3132 can be adjusted according to actual conditions, and the embodiments of the present application do not limit this.

[0099] In addition, when at least part of the first fin 3111 is in direct contact with the second bottom plate 3121, a avoiding hole can be provided at the position where the first fin 3111 is connected to the second bottom plate 3121, so that the fourth heat-conducting portion can pass through the avoiding hole. Alternatively, the second heat-conducting portion and the third heat-conducting portion can be arranged obliquely, so that the fourth heat-conducting portion can be fixed at the position where the second bottom plate 3121 is not in contact with the first fin 3111.

[0100] As a possible implementation, as shown in Figures 1-11 and Figures 16-17 The first fan 41 can be located between the heat-absorbing portion 311 and the heat-dissipating portion 312. At this time, the first air inlet end of the first fan 41 can be directed to the side of the first fin 3111 away from the mirror 55, so as to increase the heat exchange area between the first fin 3111 and the air inside the shell 1. In this way, the air inside the shell 1 can be fully in contact with the first fin 3111, and as much as possible of the air flowing through the first fin 3111 can enter the first air inlet end of the first fan 41, further improving the heat-dissipating effect and efficiency of the projection light machine.

[0101] As a possible implementation, or as shown in Figures 13-14 The first fan 41 can be located between the heat-absorbing portion 311 and the mirror 55. At this time, the first fan 41 can be arranged close to and obliquely on the side of the mirror 55 away from the lens module 2, and the first air inlet end of the first fan 41 can be directed to the side of the first fin 3111 close to the mirror 55. In this way, the heat exchange area between the first fin 3111 and the air inside the shell 1 is further increased, so that the air inside the shell 1 can be fully in contact with the first fin 3111, and as much as possible of the air flowing through the first fin 3111 can enter the first air inlet end of the first fan 41, further improving the heat-dissipating effect and efficiency of the projection light machine.

[0102] In addition, when at least part of the first fin 3111 is in direct contact with the second bottom plate 3121, an avoiding structure can be provided at the position of the first fin 3111 close to the first air inlet end of the first fan 41, so as to increase the area of the part of the first fin 3111 close to the first air inlet end. In this way, more air passing through the first fin 3111 can enter the first air inlet end of the first fan 41.

[0103] For example, the structures of the first heat sink 31 in the above examples can be combined arbitrarily, and the position of the first fan 41 can also be adjusted according to actual conditions, which will not be listed one by one in the embodiments of the present application.

[0104] For example, Figures 10-11 As shown, in the first heat sink 31, the side of the first fin 3111 close to the heat dissipation portion 312 can be in direct contact with the second base plate 3121, and the side of the first fin 3111 away from the first heat dissipation portion 312 is connected to the second base plate 3121 through four heat conductive members 3132. The first fan 41 is located between the first fin 3111 and the second base plate 3121, and the first heat conductive portions of the four heat conductive members 3132 are evenly distributed on the side of the first fin 3111 away from the first heat dissipation portion 312. In this case, the number of heat conductive members 3132 is large, and the heat conduction efficiency is higher. For another example, Figures 13-14 As shown, in the first heat sink 31, the side of the first fin 3111 close to the heat dissipation portion 312 can be in direct contact with the second base plate 3121, and the side of the first fin 3111 away from the first heat dissipation portion 312 is connected to the second base plate 3121 through two heat conductors 3132, and the first fan 41 is located between the reflector 55 and the first fin 3111; at this time, the heat exchange area between the first fin 3111 and the air inside the shell 1 is larger, and the heat absorption efficiency is higher; this is only an example and is not specifically limited.

[0105] As a possible implementation, Figures 1-17 As shown, the optical component also includes a light source 6 located outside the shell 1, and the optical path propagation component also includes a focusing rod 56 located outside the shell 1. The main function of the focusing rod 56 is to collimate the light emitted by the light source 6. After passing through the focusing rod 56, the light is incident on the front Fresnel lens 51. Furthermore, the front Fresnel lens 51 can collimate and shape the light emitted by the focusing rod 56.

[0106] Exemplarily, the light source 6 may be an LED (light-emitting diode) light source, which is only used as an example and is not specifically limited.

[0107] In some instances, such as Figures 1-17 As shown, the heat dissipation structure also includes a second heat dissipation element 32 for dissipating heat from the light source 6, and the projection light machine also includes a second fan 42, the second fan 42 having a second air inlet end and a second air outlet end; the second air inlet end faces the second heat dissipation element 32, and the second air outlet end faces away from the second heat dissipation element 32; or, the second air inlet end faces away from the second heat dissipation element 32, and the second air outlet end faces the second heat dissipation element 32.

[0108] Based on this, Figure 2 、 Figure 5 、 Figure 8 、Figure 11 、 Figure 14 and Figure 17 As shown, a system circulation duct S2 for external air circulation is also formed on the outside of the housing 1 of the projection light machine. Furthermore, when the second air inlet end of the second fan 42 is facing the second heat sink 32 and the second air outlet end is facing away from the second heat sink 32, external cold air can enter from the side of the heat sink 312 facing away from the housing 1, flow through the second fins 3122 and the second bottom plate 3121, and take away the heat conducted to the second fins 3122 and the second bottom plate 3121, cooling it. Then, it passes through the second heat sink 32, dissipates the heat and cools the second heat sink 32, enters the second air inlet end of the second fan 42, and is blown out of the housing 1 from the second air outlet end of the second fan 42. This design is more suitable for horizontal projection light machines. Alternatively, the second air inlet end may face away from the second heat sink 32, and the second air outlet end may face the second heat sink 32. In this case, external cold air may enter from the side of the heat sink 312 facing away from the housing 1, flow through the second fins 3122 and the second bottom plate 3121, and take away the heat conducted to the second fins 3122 and the second bottom plate 3121, cooling them. The air then enters the second air inlet end of the second fan 42, and is blown from the second air outlet end of the second fan 42 to the second heat sink 32, dissipating heat and cooling the second heat sink 32, and blowing the hot air out of the housing 1. This design is more suitable for vertical projectors. As can be seen, when the projector is working, external cold air can dissipate heat from the heat sink 312 and the second heat sink 32, thereby cooling the interior of the projector housing 1 and the light source 6, further improving the heat dissipation effect and cooling efficiency of the projector, so that the operating temperature of the light source 6 and the optical components inside the projector can be maintained within an appropriate range. The brightness of the projector can be greatly improved by increasing the power, thereby improving the projection quality.

[0109] For example, Figure 1 、 Figure 4 、 Figure 7 、 Figure 10 、 Figure 13 ,and Figure 16 As shown, the second heat dissipation member 32 may include a fourth fin 321 and a second heat conducting structure 322 . Heat at the light source 6 may be conducted to the fourth fin 321 through the second heat conducting structure 322 for heat dissipation.

[0110] As can be seen from the above, the projection light engine provided in the embodiment of the present application can greatly improve the heat dissipation efficiency of the projection light engine, thereby increasing the brightness of the projection light engine by more than 30% by increasing the power.

[0111] An embodiment of the present application further provides a projection device, which includes the projection light engine described in any of the above embodiments.

[0112] Compared with the prior art, the projection device has the same beneficial effects as the projection light engine described in any of the above embodiments, which will not be repeated here.

[0113] The technical features of the above-described embodiments can be combined in any manner. For the sake of brevity, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combinations of the technical features do not result in contradictions, they shall be considered within the scope of the present disclosure.

[0114] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it shall not be understood as a limitation on the patent scope of the present application. It should be pointed out that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these shall be within the protection scope of the present application. Therefore, the patent protection scope of the present application shall be subject to the appended claims.

Claims

1. A projection light engine, characterized by, The projection light machine comprises: a housing having a receiving cavity therein; an optical assembly comprising a light path propagation assembly and a lens module, the light path propagation assembly comprising a reflector located in the receiving cavity, and the lens module being arranged through a side wall of the housing; a heat dissipation structure comprising a first heat dissipation member, the first heat dissipation member comprising a heat absorbing portion and a heat dissipating portion, the heat absorbing portion being arranged in the receiving cavity and located at a side of the reflector away from the lens module, and the heat dissipating portion being arranged at a side of the housing away from the lens module; a first fan arranged in the receiving cavity and located between the heat absorbing portion and the heat dissipating portion, the first fan having a first air inlet end facing the heat absorbing portion.

2. The projection engine of claim 1, wherein, The light path propagation assembly comprises a plurality of light path propagation structures arranged in a first direction; the reflector has opposite first and second ends, and the distance between the reflector and the lens module in a second direction gradually increases from the first end to the second end, the second direction being perpendicular to and coplanar with the first direction; the heat absorbing portion comprises a plurality of first fins arranged at intervals, the first fins having opposite third and fourth ends, the third end being close to the first end and the fourth end being close to the second end, and the cross-sectional area of the first fin gradually decreases from the third end to the fourth end, the cross-section being a plane perpendicular to the first direction.

3. The projection printer according to claim 2, wherein The first heat dissipation member further comprises a first heat conduction structure connecting the heat absorbing portion and the heat dissipating portion.

4. The projection printer according to claim 2, wherein At least part of the side of the first fin away from the reflector is connected to the heat dissipating portion.

5. The projection engine of claim 3, wherein, The heat absorbing portion further comprises a first bottom plate, and a plurality of the first fins are arranged at intervals on the first bottom plate; the heat dissipating portion comprises a second bottom plate and a plurality of second fins arranged at intervals on the surface of the second bottom plate, one end of the first heat conduction structure being connected to the first bottom plate and the other end being connected to the second bottom plate.

6. The projection printer according to claim 5, wherein The first heat conduction structure comprises a heat conduction plate, and the first heat dissipation member further comprises a plurality of third fins arranged at intervals on the surface of the heat conduction plate and the first bottom plate away from the first fins.

7. The projection engine of claim 3, wherein, The first heat conduction structure comprises a heat conduction member, the heat conduction member comprising first, second and third heat conduction portions, the first heat conduction portion being arranged through one end of the first fin away from the heat dissipating portion along the arrangement direction of the first fin, one end of the second heat conduction portion and one end of the third heat conduction portion being respectively connected to opposite ends of the first heat conduction portion, and one end of the second heat conduction portion and one end of the third heat conduction portion away from the first heat conduction portion being connected to the heat dissipating portion.

8. The projection engine of claim 1, wherein, The first fan is located between the heat absorbing portion and the heat dissipating portion, or the first fan is located between the heat absorbing portion and the reflector.

9. The projection printer according to any one of claims 1 to 8, characterized in that The optical assembly further comprises a light source, the heat dissipation structure further comprises a second heat dissipation member for dissipating heat of the light source, and the projection light machine further comprises a second fan having a second air inlet end and a second air outlet end. The second air inlet end faces the second heat dissipation member, and the second air outlet end faces away from the second heat dissipation member; or the second air inlet end faces away from the second heat dissipation member, and the second air outlet end faces the second heat dissipation member.

10. A projection apparatus, characterized by, The projection device comprises the projection light engine according to any one of claims 1-9.

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