CN-119717373-B - Radiating module and projection device

Abstract

A heat radiation module is suitable for radiating heat of a heat source and comprises an airflow generator, a heat radiation substrate, a heat radiation piece, a baffle plate and a heat pipe. The heat dissipation substrate is connected with a heat source. The heat pipe is connected between the heat radiating substrate and the heat radiating piece and used for transferring heat energy of the heat source from the heat radiating substrate to the heat radiating piece. The heat dissipation piece comprises a body part and a plurality of first fins, wherein the plurality of first fins are arranged around the outer periphery of the body part, and a containing space is formed by the plurality of first fins and the body part. The airflow generator is provided with an axis of rotation, is accommodated in the accommodating space and is connected with the body part. The baffle is connected with the first fins and provided with an opening for aligning the air inlet face of the air flow generator. The opening is positioned on the rotating axis and is perpendicular to a reference plane of the rotating axis, the orthographic projection of each of the plurality of first fins is at least partially not overlapped with the orthographic projection of the airflow generator, and the orthographic projection of the baffle is overlapped with the orthographic projections of the plurality of first fins. A projection device is also provided. Thereby achieving better heat dissipation effect.

Inventors

• JIAN WEIMIN
• Hu dongzhou
• CHEN YAOHONG

Assignees

• 中强光电股份有限公司

Dates

Publication Date

20260512

Application Date

20240118

Priority Date

20230928

Claims (20)

1. 1. The heat radiation module is suitable for radiating heat of a heat source and comprises an airflow generator, a heat radiation substrate, a heat radiation piece, a baffle plate and a heat pipe; wherein the method comprises the steps of The heat dissipation substrate is connected with the heat source; the heat pipe is connected between the heat radiating substrate and the heat radiating piece and is used for transmitting the heat energy of the heat source from the heat radiating substrate to the heat radiating piece; The heat dissipation piece comprises a body part and a plurality of first fins, the plurality of first fins are arranged around the outer periphery of the body part, and a containing space is formed by the plurality of first fins and the body part; the airflow generator is provided with an axis of rotation, is accommodated in the accommodating space and is connected with the body part, and The baffle is connected with the first fins and provided with an opening aligned with the air inlet surface of the air flow generator, wherein The opening is positioned on the rotating axis and is perpendicular to a reference plane of the rotating axis, the orthographic projection of each of the first fins is at least partially not overlapped with the orthographic projection of the airflow generator, the orthographic projection of the baffle is overlapped with the orthographic projections of the first fins, The air flow generator comprises a back plate and a fan blade part, A space is arranged between the baffle plate and the fan blade part of the airflow generator on the rotating shaft line, The back plate is positioned on the rotating shaft line and connected with the body part of the heat dissipation piece, the back plate is positioned on one side of the airflow generator away from the wind inlet surface, The opening of the baffle is configured to provide air flow into the air inlet face of the airflow generator, the air flow being directed by the airflow generator into a plurality of airflow channels between the plurality of first fins.
2. 2. The heat dissipating module of claim 1, wherein the orthographic projection of the opening overlaps and is less than the orthographic projection of the airflow generator on the reference plane perpendicular to the axis of rotation.
3. 3. The heat dissipating module of claim 1, wherein each of said plurality of first fins is disposed perpendicular to said axis of rotation, said plurality of first fins being spaced apart from one another along a circumferential direction of said body portion to form said plurality of air flow channels, one of said plurality of air flow channels being disposed between any two adjacent ones of said plurality of first fins.
4. 4. The heat dissipating module of claim 3, wherein said baffle comprises a plurality of second fins spaced apart from each other and respectively opposite said plurality of air flow channels.
5. 5. The heat dissipating module of claim 4, wherein each of said plurality of second fins extends from said baffle toward said body portion of said heat dissipating member along an extension direction, said extension direction being parallel to said rotational axis, wherein a length of each of said plurality of second fins is less than a length of each of said plurality of first fins in said extension direction.
6. 6. The heat dissipating module of claim 1, wherein the pitch is less than 0.3 millimeters.
7. 7. The heat dissipating module of claim 1, wherein the airflow generator is a frameless blower.
8. 8. The heat dissipating module of claim 1, wherein the orthographic projection of the heat source disposed on the heat dissipating substrate overlaps the orthographic projection of the airflow generator on the reference plane perpendicular to the rotation axis.
9. 9. The heat dissipating module of claim 1, wherein the fan blade portion of the airflow generator comprises a plurality of fan blades disposed about the rotational axis, the fan blade portion being adapted to rotate in a rotational direction about the rotational axis, each of the plurality of fan blades being inclined in a direction opposite the rotational direction.
10. 10. The heat dissipating module of claim 9, wherein the plurality of first fins are disposed about the airflow generator, and wherein each of the plurality of first fins does not pass through the rotational axis from a direction of extension proximate the rotational axis toward a direction away from the rotational axis.
11. 11. The heat dissipating module of claim 9, wherein each of said plurality of first fins has an end portion adjacent to said rotational axis, a reference extension line passing through said end portion and said rotational axis, said reference extension line having an included angle with said first fin corresponding to said end portion of greater than 0 degrees and less than 90 degrees.
12. 12. The heat dissipating module of claim 9, wherein each of said plurality of fan blades has a fan blade orthographic projection on said reference plane perpendicular to said rotational axis, said fan blade orthographic projection having a first end proximate said rotational axis and a second end distal from said rotational axis, said first end and said second end of said fan blade orthographic projection being connected in line, said linear extension of said fan blade orthographic projection being between 80 only with two extensions of two of said plurality of first fins orthographic projections on said reference plane To 100 Is included in the bearing.
13. 13. The heat dissipating module of claim 9, wherein an end of each of said plurality of fan blades distal from said rotational axis has a spacing from each of said adjacent plurality of first fins of 5 millimeters or more.
14. 14. The heat dissipating module of claim 10, wherein said plurality of first fins are spaced apart from one another along a circumferential direction of said body portion to form a plurality of air flow channels, one of said plurality of air flow channels being located between any two adjacent ones of said plurality of first fins.
15. 15. The heat dissipating module of claim 1, wherein an orthographic projection of the airflow generator is entirely within an orthographic projection of the body portion on the reference plane perpendicular to the rotational axis.
16. 16. The heat dissipating module of claim 15, wherein said body portion has two through holes aligned with an air inlet face of said air flow generator, said two through holes having an area smaller than an area of said opening.
17. 17. The heat dissipating module of claim 16, wherein the heat dissipating member comprises a plurality of third fins disposed in the two through holes, and the plurality of first fins, the third fins and the body portion form the accommodating space.
18. 18. A projection device comprising a housing, a light source module, a light engine module, a projection lens, and a heat dissipation module as defined in any one of claims 1 to 17, wherein The heat radiation module, the light source module, the optical machine module and the projection lens are arranged in the shell; The shell is provided with a first cover plate, a second cover plate and a cylindrical part, wherein the first cover plate and the second cover plate are opposite, the cylindrical part is connected between the first cover plate and the second cover plate, and the cylindrical part is provided with an air inlet adjacent to the first cover plate and an air outlet adjacent to the second cover plate; the light source module is used for providing illumination light beams; The optical module is disposed on the transmission path of the illumination beam, and comprises a light valve for converting the illumination beam into an image beam, and The projection lens is positioned on the transmission path of the image light beam from the light valve and is used for projecting the image light beam out of the projection device.
19. 19. The projection device of claim 18, wherein the heat dissipating substrate is configured to be coupled to the light source module, the heat dissipating substrate being positioned between the projection lens and the baffle.
20. 20. The projection device of claim 18, wherein the heat dissipating substrate is adjacent to the first cover plate, the airflow generator is adjacent to the second cover plate, ambient air outside the housing flows into the housing through the air inlet, enters the air inlet surface of the airflow generator from the opening of the baffle plate, enters the airflow channels of the heat dissipating member from the airflow generator, and flows out of the housing from the air outlet.

Description

Radiating module and projection device Technical Field The present invention relates to a heat dissipation module, and more particularly to a projection device using the heat dissipation module. Background With the advancement of technology, the volume of the projection device is gradually reduced, and even a portable projection device is developed. However, due to different design of the projection device, it is required to consider whether the heat conduction of the heat dissipation module in the projection device is good, and whether the heat dissipation module causes noise problem. The background section is only for the purpose of aiding in the understanding of the present invention and thus the disclosure of the section "background section" may contain some of the known art that does not form part of the understanding of those skilled in the art. The matters disclosed in the "background" section are not representative of the matters or problems to be solved by one or more embodiments of the present invention, and are known or recognized by those skilled in the art prior to the application of the present invention. Disclosure of Invention The invention provides a heat radiation module which has good heat radiation effect and low noise. The invention provides a projection device which comprises the heat dissipation module. Other objects and advantages of the present invention will be further appreciated from the technical features disclosed in the present invention. In order to achieve one or a part or all of the above or other objects, an embodiment of the invention provides a heat dissipation module adapted to dissipate heat from a heat source, the heat dissipation module including an airflow generator, a heat dissipation substrate, a heat dissipation member, a baffle plate and a heat pipe. The heat dissipation substrate is connected with a heat source. The heat pipe is connected between the heat radiating substrate and the heat radiating piece and used for transferring heat energy of the heat source from the heat radiating substrate to the heat radiating piece. The heat dissipation piece comprises a body part and a plurality of first fins, wherein the plurality of first fins are arranged around the outer periphery of the body part, and a containing space is formed by the plurality of first fins and the body part. The airflow generator is provided with an axis of rotation, is accommodated in the accommodating space and is connected with the body part. The baffle is connected with the first fins and provided with an opening for aligning the air inlet face of the air flow generator. The opening is positioned on the rotating axis, and the orthographic projection of each of the plurality of first fins is at least partially not overlapped with the orthographic projection of the airflow generator on a reference plane perpendicular to the rotating axis. In order to achieve one or a part or all of the above or other objects, an embodiment of the invention provides a projection apparatus including a housing, a light source module, a light engine module, a projection lens, and the heat dissipation module. The heat radiation module, the light source module, the optical machine module and the projection lens are arranged in the shell. The shell is provided with a first cover plate, a second cover plate and a cylindrical part, wherein the first cover plate and the second cover plate are opposite, the cylindrical part is connected between the first cover plate and the second cover plate, and the cylindrical part is provided with an air inlet adjacent to the first cover plate and an air outlet adjacent to the second cover plate. The light source module is used for providing an illumination beam. The optical module is arranged on the transmission path of the illumination light beam, and comprises a light valve for converting the illumination light beam into an image light beam. The projection lens is positioned on the transmission path of the image light beam from the light valve and is used for projecting the image light beam out of the projection device. Based on the foregoing, embodiments of the present invention have at least one of the following advantages or effects. In the projection device of the present invention, the heat dissipation module is adapted to dissipate heat from a heat source. For example, the ambient air outside the casing of the projection device can flow into the casing through the air inlet, enter the air inlet surface of the airflow generator from the opening of the baffle plate, enter the plurality of airflow channels of the heat dissipation piece from the airflow generator, and flow out of the casing from the air outlet, so as to achieve better heat dissipation effect. In order to make the above features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below. Drawings Fig. 1 is a schematic view of a projection apparat