CN-224232096-U - Projection ray apparatus and projection equipment

CN224232096UCN 224232096 UCN224232096 UCN 224232096UCN-224232096-U

Abstract

The application relates to a projection optical machine and projection equipment, wherein the projection optical machine comprises a shell, an optical assembly, a heat radiation structure and a first fan, the optical assembly comprises an optical path transmission assembly and a lens module, the optical path transmission assembly comprises a reflecting mirror positioned in a containing cavity, the reflecting mirror is provided with a first end and a second end which are opposite, the distance between the reflecting mirror and the lens module in a first direction is gradually increased from the first end to the second end, the heat radiation structure comprises a first heat radiation piece, the first heat radiation piece comprises a heat absorption part and a heat radiation part, the heat absorption part is arranged in the containing cavity and is positioned at one side of the reflecting mirror, which is far away from the lens module, the heat radiation part is positioned outside the containing cavity and is positioned at one side of the shell, which is far away from the lens module, the heat absorption part comprises a plurality of first fins which are arranged at intervals along a second direction, the first fins comprise a first sub fin close to the first end and a second sub fin which are close to the second end, and the projection area of the first fins in the second direction has a gradually reduced variation trend.

Inventors

WU XILIANG
XIONG ZEYI
CHEN ZHAO
TAN LIANG

Assignees

峰米(重庆)创新科技有限公司

Dates

Publication Date: 20260512
Application Date: 20250605

Claims (10)

1. A projection light engine, comprising: a housing having a receiving cavity therein; The optical assembly comprises an optical path propagation assembly and a lens module, the optical path propagation assembly comprises a reflecting mirror positioned in the accommodating cavity, the lens module penetrates through the side wall of the shell, the reflecting mirror is provided with a first end and a second end which are opposite, the first end faces the lens module, and the distance between the reflecting mirror and the lens module in a first direction is gradually increased from the first end to the second end; The heat dissipation structure comprises a first heat dissipation part, the first heat dissipation part comprises a heat absorption part and a heat dissipation part, the heat absorption part is arranged in the accommodating cavity and is positioned at one side of the reflector, which is away from the lens module, and the heat dissipation part is positioned outside the accommodating cavity and is arranged at one side of the shell, which is away from the lens module; the heat absorbing part comprises a plurality of first fins which are arranged at intervals along a second direction, wherein the second direction is perpendicular to the first direction and coplanar with the first direction, the first fins comprise a first sub-fin close to the first end and a second sub-fin close to the second end, and the projection area of the first fins in the second direction gradually decreases from the first sub-fins to the second sub-fins; The first fan is arranged in the accommodating cavity and is provided with a first air inlet end, and the first air inlet end faces the heat absorbing part.
2. The projection light engine of claim 1, wherein the first heat sink further comprises a base plate, the heat sink and the heat sink being connected by the base plate; The heat dissipation part comprises a plurality of second fins which are arranged on the surface of the bottom plate at intervals along a third direction, the first fins and the second fins are respectively positioned on two sides of the bottom plate in the first direction, and the first direction, the second direction and the third direction are mutually perpendicular.
3. The projection light engine of claim 2, wherein the second fin includes a body portion and an elongated portion, an orthographic projection of the body portion on a plane of the base plate at least partially overlaps an orthographic projection of the heat sink portion on the plane of the base plate, and an orthographic projection of the elongated portion on the plane of the base plate is located outside an orthographic projection of the heat sink portion on the plane of the base plate.
4. The projection optical engine according to claim 3, wherein the first heat dissipation member further includes a first heat conduction member including a first heat conduction portion, a second heat conduction portion, and a third heat conduction portion connected in sequence, the first heat conduction portion penetrating through the body portions of the plurality of second fins in the arrangement direction of the second fins, the third heat conduction portion penetrating through the extension portions of the plurality of second fins in the arrangement direction of the second fins, and the second heat conduction portion connecting the first heat conduction portion and the third heat conduction portion.
5. The projection light engine as claimed in claim 2, characterized in that the base plate is connected to the first fin and/or the second fin by welding or integrally extrusion.
6. The projection light engine of claim 1, wherein the optical assembly further comprises a light source, the heat dissipation structure further comprises a second heat dissipation member for dissipating heat from the light source, the second heat dissipation member comprises a plurality of third fins arranged at intervals along the first direction or the third direction, and the first direction, the second direction and the third direction are perpendicular to each other.
7. The projection light engine of claim 6, wherein the second heat dissipation element further comprises a second heat conduction element and a third heat conduction element, the third heat conduction element is connected with the light source, the second heat conduction element comprises a fourth heat conduction part, a fifth heat conduction part and a sixth heat conduction part which are sequentially connected, the fourth heat conduction part is connected to the surface of the third heat conduction element, which is away from one side of the light source, the sixth heat conduction part penetrates through a plurality of third fins along the arrangement direction of the third fins, and the fifth heat conduction part is connected with the fourth heat conduction part and the sixth heat conduction part.
8. The projection light engine of claim 6, wherein the light path propagation assembly further comprises a light collection rod positioned outside the receiving cavity, the light collection rod being positioned between the light source and the reflector in the second direction, the light collection rod having a cross-sectional area in the second direction that gradually increases in a direction away from the light source; The third fins are arranged at intervals along the third direction and are located on one side of the first direction of the light condensing rod, the third fins are provided with third ends and fourth ends located on two sides of the second direction, the third ends face the light source, and the cross section area of the third fins in the second direction gradually decreases in changing trend from the third ends to the fourth ends.
9. The projector of claim 6, further comprising a second fan having a second air inlet end and a second air outlet end aligned in the second direction, the second air inlet end facing the second heat sink and the second air outlet end facing away from the second heat sink, or the second air inlet end facing away from the second heat sink and the second air outlet end facing the second heat sink.
10. A projection device comprising a projection engine as claimed in any one of claims 1 to 9.

Description

Projection ray apparatus and projection equipment Technical Field The present application relates to the field of projection devices, and in particular, to a projection light machine and a projection device. Background A projector is an electronic device capable of converting an image or video signal into a visual image and projecting the visual image through a lens system, and is now widely used in presentations and home theaters. Different projectors use different imaging technologies, of which a monolithic liquid crystal projector employing liquid crystal display technology for imaging is more common. The projector mainly comprises a light machine, an imaging system and a control system, wherein the light machine is the core of the whole projector and comprises a light source, a liquid crystal screen, light path elements and the like. Early ray apparatus adopts open design, and in the heat dissipation process, the dust in the air can inevitably enter into the light path inside, leads to projection effect variation, and has shortened the life of projecting apparatus. In contrast, the light path structure of the fully-sealed optical machine is sealed and independent, so that the dustproof effect can be greatly enhanced. In order to solve the heat dissipation problem of the liquid crystal screen after the optical engine is sealed, the existing full-sealed optical engine generally adopts a built-in turbofan in the optical engine to conduct internal circulation heat dissipation, and meanwhile, heat dissipation structures such as a heat exchanger are configured to achieve cooling. However, the existing fully-sealed optical machine has limited heat dissipation effect, so that the brightness and power of the optical machine are greatly limited. Disclosure of utility model Accordingly, it is necessary to provide a projection optical engine and a projection apparatus, which can improve the heat dissipation and cooling effects of the optical engine, thereby greatly improving the power and brightness of the projection optical engine. The embodiment of the first aspect of the application provides a projection optical machine, which comprises a shell, an optical assembly, a heat dissipation structure and a first fan, wherein an accommodating cavity is formed in the shell, the optical assembly comprises an optical path transmission assembly and a lens module, the optical path transmission assembly comprises a reflecting mirror arranged in the accommodating cavity, the lens module penetrates through the side wall of the shell, the reflecting mirror is provided with a first end and a second end which are opposite, the first end faces the lens module, the distance between the reflecting mirror and the lens module in a first direction is gradually increased, the heat dissipation structure comprises a first heat dissipation part, the first heat dissipation part comprises a heat absorption part and a heat dissipation part, the heat absorption part is arranged in the accommodating cavity and is arranged on the side, away from the lens module, of the reflecting mirror, the heat dissipation part is arranged outside the accommodating cavity and is arranged on the side, away from the lens module, of the shell, the heat absorption part comprises a plurality of first sub-fins which are arranged at intervals along a second direction, the second direction is perpendicular to the first direction and coplanar, the first sub-fins close to the first end and the second sub-fins close to the second sub-fins are arranged in the first direction, the first sub-fins are gradually reduced in the projection area of the first fins in the second direction is gradually reduced towards the second sub-fins, and the first sub-fins are arranged towards the first fan, and the first fan is arranged towards the first air inlet end, and has a trend towards the first fan, and the first air inlet end is arranged in the first air inlet end. In one embodiment, the first heat dissipation part further comprises a bottom plate, the heat absorption part and the heat dissipation part are connected through the bottom plate, the heat dissipation part comprises a plurality of second fins which are arranged on the surface of the bottom plate at intervals along a third direction, the first fins and the second fins are respectively positioned on two sides of the bottom plate in the first direction, and the first direction, the second direction and the third direction are mutually perpendicular. In one embodiment, the second fin includes a body portion and an extension portion, where an orthographic projection of the body portion on a plane of the base plate and an orthographic projection of the heat absorbing portion on the plane of the base plate overlap at least partially, and an orthographic projection of the extension portion on the plane of the base plate is located outside an orthographic projection of the heat absorbing portion on the plane of the base plate. In o