Projector heat dissipation structure and projector

Abstract

The utility model discloses a heat radiation structure of a projector. The heat radiation structure comprises an optical machine housing, an optical assembly and a first heat radiation assembly. A first partition plate is arranged in the cavity of the light machine shell, and the first heat dissipation assembly comprises a first fan arranged in the cavity of the light machine shell. The first partition plate is arranged on the downstream of an air path of the first fan so as to guide air of the first fan to be blown to the display screen. A first air guide block is arranged on one side of the first partition plate, and the side face, close to the first fan, of the first air guide block is an inclined face so as to change the direction of part of air of the first fan, that is, part of air flows upwards under guiding of the first air guide block; an air duct is arranged between the first air guide block and the first partition plate, and part of air flows along the air duct (the air direction is not changed), so that wind energy generated by the first fan uniformly passes through the whole screen surface of the display screen, the overall heat dissipation efficiency of the display screen is effectively improved, the fault rate of the display screen is reduced, and the service life of the projector is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of projector technology, and in particular to a projector heat dissipation structure and a projector. Background Technology

[0002] A projector is a digital device that projects electronic data or images onto a screen optically. With the development of technology, projectors are increasingly used in people's daily work and life; for example, many teaching venues have installed projectors to facilitate teaching. The electronic components of a projector generate heat during operation, requiring heat dissipation. Existing projectors generally use fans (such as blowers) to create airflow paths, thereby improving heat dissipation. However, the airflow from the blower's outlet is mainly centrifugal (downward), resulting in overly concentrated airflow and uneven heat dissipation for some electronic components. For example, uneven heat dissipation between the upper and lower parts of the screen can easily lead to screen burn-in or blackout phenomena in areas with low heat dissipation efficiency. Therefore, this paper proposes a projector heat dissipation structure and a projector design. Summary of the Invention

[0003] The purpose of this invention is to provide a heat dissipation structure for a projector and a projector in order to solve the above-mentioned problems.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A heat dissipation structure for a projector, comprising:

[0006] Optical engine housing, wherein a first partition is provided inside the cavity of the optical engine housing;

[0007] An optical component is disposed in the optical engine housing, and the optical component includes a light source, a display screen and a lens sequentially disposed downstream of the light source optical path;

[0008] The first heat dissipation component includes a first fan disposed within the optical engine housing cavity;

[0009] The first partition is located downstream of the first fan airflow path to guide the airflow from the first fan toward the display screen; a first air guide block is provided on one side of the first partition, and the side of the first air guide block near the first fan is inclined to change part of the airflow direction from the first fan; an air duct is provided between the first air guide block and the first partition.

[0010] Optionally, the optical component further includes a reflector cup, the light source is disposed on the light inlet of the reflector cup, a first Fresnel lens is disposed on one side of the light amplification port of the reflector cup, a heat-insulating glass is disposed between the first Fresnel lens and the display screen, and a second Fresnel lens is disposed on the side of the display screen away from the heat-insulating glass.

[0011] Optionally, the optical engine housing has a first cavity and a second cavity, the first fan, the first partition and the first air guide block are all disposed in the first cavity, the first Fresnel lens and the display screen form a first air duct connecting the first cavity and the second cavity, and the display screen and the second Fresnel lens form a second air duct connecting the first cavity and the second cavity.

[0012] Optionally, a first heat sink is provided on the first cavity, and a second fan is provided on one side of the first heat sink, with the second fan located outside the first cavity.

[0013] Optionally, the second cavity is provided with a third fan, a second partition and a diverter plate. One end of the second partition is connected to the display screen and the other end is connected to the third fan. The diverter plate is located downstream of the airflow path of the third fan to guide the airflow of the third fan to both sides of the heat-insulating glass.

[0014] Optionally, a second air guide block is provided on both sides of the diversion plate. The side of the second air guide block near the third fan is inclined to change the direction of part of the airflow from the third fan. There are air ducts between the second air guide block and the second partition, and between the second air guide block and the inner wall of the second cavity.

[0015] The inclination angle between the first and second air guide blocks ranges from 35° to 75°.

[0016] Optionally, the projector heat dissipation structure further includes a second heat dissipation component, which includes a second heat sink disposed on the light source lamp holder, and a fourth fan is disposed on both sides of the second heat sink.

[0017] Optionally, the optical engine housing includes a base and a cover.

[0018] This utility model also provides a projector, including the above-described projector heat dissipation structure.

[0019] Compared with existing technologies, this utility model has the following beneficial effects: When the projector is working, the light generated by the light source is projected onto the external screen through the display screen and lens; at the same time, the heat generated by the light source and the heat generated by the electronic components during operation causes the temperature of the electronic components themselves to rise, that is, the temperature of the display screen to rise. The first fan is activated synchronously when the projector is working, and the airflow from the first fan outlet mainly blows out in a centrifugal direction (downward). Because there is an air duct between the first air guide block and the first partition, when the air generated by the first fan passes through the first air guide block, part of the airflow flows along the air duct (without changing the airflow direction), and part of the airflow flows upward under the guidance of the first air guide block, thus ensuring that the airflow generated by the first fan can evenly pass over the entire screen surface when passing through the display screen. In existing projector heat dissipation structures, because the airflow from the cooling fan outlet mainly blows out in a centrifugal direction (downward), the airflow generated by the cooling fan mainly passes through the lower screen surface, resulting in low heat dissipation efficiency of the upper screen surface. Compared to existing projector heat dissipation structures, the projector heat dissipation structure disclosed in this utility model, through the design of the first air guide block, can guide part of the airflow to the upper surface of the display screen, thereby making the airflow over the display screen more uniform, effectively improving the overall heat dissipation efficiency of the display screen, reducing the failure rate of the display screen, and increasing the service life of the projector. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0022] Figure 1 This is a schematic diagram of the heat dissipation structure of the projector according to the present invention;

[0023] Figure 2 This is a schematic diagram of the internal structure of the projector heat dissipation structure of this utility model;

[0024] Figure 3 This is a top view of the internal structure of the projector heat dissipation structure of this utility model;

[0025] Figure 4 This is an exploded view of the optical engine casing;

[0026] Figure 5 This is a schematic diagram of the base structure;

[0027] Figure 6 for Figure 5 Enlarged view of section A in the middle;

[0028] Figure 7 for Figure 5 Enlarged view of section B.

[0029] Illustrations: 10. Optical engine housing; 11. First partition; 12. Base; 13. Cover; 20. Optical components; 21. Light source; 22. Display screen; 23. Lens; 24. Reflector; 25. First Fresnel lens; 26. Heat-insulating glass; 27. Second Fresnel lens; 30. First heat dissipation assembly; 31. First fan; 32. First air guide block; 33. First heat sink; 34. Second fan; 35. Third fan; 36. Second partition; 37. Diverter plate; 38. Second air guide block; 40. Second heat dissipation assembly; 41. Second heat sink; 42. Fourth fan. Detailed Implementation

[0030] To make the invention's objectives, features, and advantages more apparent and understandable, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0031] In the description of this utility model, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component centrally located at the same time.

[0032] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0033] Reference Figures 1 to 7This utility model provides a projector with a heat dissipation structure. The heat dissipation structure includes an optical engine housing 10, an optical component 20, and a first heat dissipation component 30. A first partition 11 is disposed within the cavity of the optical engine housing 10. The optical component 20 is disposed within the optical engine housing 10 and includes a light source 21, a display screen 22, and a lens 23 sequentially disposed downstream of the light path of the light source 21. The first heat dissipation component 30 includes a first fan 31 disposed within the cavity of the optical engine housing 10. The first partition 11 is disposed downstream of the airflow path of the first fan 31 to guide the airflow from the first fan 31 towards the display screen 22. Simultaneously, the first partition 11 separates the air inlet and outlet airflow paths of the first fan 31; that is, the air inlet of the first fan 31 is located on one side of the first partition 11, and the air outlet of the first fan 31 is located on the other side of the first partition 11. A first air guide block 32 is provided on one side of the first partition 11. The air outlet of the first air guide block 32 and the first fan 31 are located on the same side of the first partition 11, and the side of the first air guide block 32 near the air outlet of the first fan 31 is inclined to change the direction of part of the airflow from the first fan 31. There is an air duct between the first air guide block 32 and the first partition 11. When the air generated by the first fan 31 passes through the first air guide block 32, part of the airflow flows upward under the guidance of the first air guide block 32, and the other part flows downward along the air duct (without changing the airflow direction). This allows the air generated by the first fan 31 to pass evenly over the entire screen surface of the display screen 22, effectively improving the overall heat dissipation efficiency of the display screen 22, reducing the failure rate of the display screen 22, and increasing the service life of the projector.

[0034] Furthermore, the optical component 20 also includes a reflector 24, with the light source 21 positioned at the light entrance of the reflector 24. A first Fresnel lens 25 is positioned on one side of the light-expanding port of the reflector 24. A heat-insulating glass 26 is positioned between the first Fresnel lens 25 and the display screen 22, and a second Fresnel lens 27 is positioned on the side of the display screen 22 away from the heat-insulating glass 26. That is, the optical path direction of the light source 21 is, in sequence, reflector 24, first Fresnel lens 25, heat-insulating glass 26, display screen 22, and second Fresnel lens 27. In this embodiment of the invention, the reflector cup 24 is disposed inside the reflector cup sleeve, and the lamp holder of the light source 21, the inner wall of the reflector cup 24, the inner wall of the inner cavity of the optical engine housing 10, and the lens 23 together form a sealed optical path cavity. The lamp body of the light source 21, the first Fresnel lens 25, the heat insulation glass 26, the display screen 22, and the second Fresnel lens 27 are all disposed in the sealed optical path cavity to prevent dust from entering the optical path system and affecting the transmission of light, thereby effectively improving the performance of the optical system and the image quality.

[0035] Furthermore, the optical engine housing 10 has a first cavity and a second cavity, and the first cavity and the second cavity are located within a sealed optical path cavity. The first fan 31, the first partition 11, and the first air guide block 32 are all disposed within the first cavity. The first Fresnel lens 25 and the display screen 22 form a first air duct connecting the first cavity and the second cavity, and the display screen 22 and the second Fresnel lens 27 form a second air duct connecting the first cavity and the second cavity, so that the air generated by the first fan 31 flows sequentially along the first cavity, the second air duct, the second cavity, and the first air duct, and then flows back to the first cavity after passing through the first air duct, thereby forming an internal circulating airflow within the sealed optical path cavity, thereby dissipating heat from the optical component 20.

[0036] Furthermore, a first heat sink 33 is provided on the first cavity. The first heat sink 33 includes a substrate and first heat sink fins disposed on both sides of the substrate. The substrate is connected to the side wall of the optomechanical housing 10, that is, the substrate is part of the side wall of the sealed optical path cavity. The first heat sink fins on one side of the first heat sink 33 are located inside the sealed optical path cavity, and the first heat sink fins on the other side are located outside the sealed optical path cavity, thereby dissipating heat from inside the sealed optical path cavity to outside the sealed optical path cavity through the first heat sink 33. A second fan 34 is provided on one side of the first heat sink 33, and the second fan 34 is located on one side of the first heat sink outside the sealed optical path cavity, that is, the second fan 34 is located outside the first cavity, to increase the heat dissipation efficiency of the first heat sink 33. It should be noted that in this embodiment of the present invention, the first Fresnel lens 25, the heat-insulating glass 26, the display screen 22, and the second Fresnel lens 27 are all installed in the cavity of the optical engine housing 10 through a mounting frame (not shown in the figure), so that the first air duct and the second air duct are not directly connected, that is, the air of the second air duct can only enter the first air duct after passing through the second cavity.

[0037] Furthermore, the second cavity is equipped with a third fan 35, a second partition 36, and a diverter 37. The second partition 36 separates the air inlet and outlet paths of the second fan 34, meaning the air inlet of the second fan 34 is located on one side of the second partition 36, and the air outlet of the second fan 34 is located on the other side of the second partition 36. Specifically, one end of the second partition 36 is connected to the display screen 22, and the other end is connected to the third fan 35, thereby placing the air inlet of the second fan 34 downstream of the air outlet path of the first fan 31. The diverter 37 is located downstream of the air outlet path of the third fan 35 to guide the airflow from the third fan 35 to both sides of the heat-insulating glass 26.

[0038] Furthermore, second air guide blocks 38 are provided on both sides of the diversion plate 37. The side of the second air guide block 38 near the third fan 35 is inclined to change the direction of some of the airflow from the third fan 35. Air ducts are provided between the second air guide block 38 and the second partition plate 36, and between the second air guide block 38 and the inner wall of the second cavity. It should be noted that both the first fan 31 and the second fan 34 are blowers, and the airflow from the blower outlets is mainly blown out in a centrifugal direction (downward). The principle by which the second air guide block 38 guides the airflow generated by the third fan 35 upward is the same as that of the first air guide block 32, and will not be repeated here. It should be noted that through the design of the first air guide block 32 and the second air guide block 38, not only can the airflow be evenly distributed to the upper and lower surfaces of the display screen, but also to the upper and lower parts of the first Fresnel lens 25, the heat-insulating glass 26, and the second Fresnel lens 27, thereby improving the overall heat dissipation effect of the optical assembly 20. The optical engine housing 10 of this embodiment includes a base 12 and a cover 13, with a first air guide block 32 and a second air guide block 38 both disposed on the base 12. Optionally, the inclination angle of the inclined surfaces of the first air guide block 32 and the second air guide block 38 ranges from 35° to 75°.

[0039] Furthermore, the projector's heat dissipation structure also includes a second heat dissipation component 40. The second heat dissipation component 40 includes a second heat sink 41 mounted on the lamp holder of the light source 21, and a fourth fan 42 is mounted on both sides of the second heat sink 41. The second heat sink 41 includes a base, a heat pipe penetrating the base, and second heat sink fins mounted at both ends of the heat pipe. The fourth fan 42 is mounted on one side of the second heat sink fins. The design of the second heat sink 41 effectively improves the heat dissipation efficiency of the lamp holder of the light source 21.

[0040] This utility model embodiment provides a projector heat dissipation structure. Specifically, when the projector is working, the light generated by the light source 21 is projected onto an external screen through the display screen 22 and lens 23. Simultaneously, the heat generated by the light source 21 and the heat generated by the electronic components during operation causes the temperature of the electronic components themselves to rise, i.e., the temperature of the display screen 22 rises. The first fan 31 is activated synchronously when the projector is working. The airflow from the outlet of the first fan 31 mainly blows out in a centrifugal direction (downward). Since there is an air duct between the first air guide block 32 and the first partition 11, when the air generated by the first fan 31 passes through the first air guide block 32, part of the airflow flows along the air duct (without changing the airflow direction), and part of the airflow flows upward under the guidance of the first air guide block 32. This ensures that the airflow generated by the first fan 31 can evenly pass over the entire screen surface of the display screen 22. In existing projector heat dissipation structures, because the airflow from the cooling fan outlet mainly blows out in a centrifugal direction (downward), the airflow generated by the cooling fan mainly passes over the lower screen surface of the display screen 22, resulting in low heat dissipation efficiency on the upper screen surface of the display screen 22. Compared to existing projector heat dissipation structures, the projector heat dissipation structure disclosed in this utility model, through the design of the first air guide block 32, can guide part of the airflow to the upper surface of the display screen 22, thereby making the airflow through the display screen 22 more uniform, effectively improving the overall heat dissipation efficiency of the display screen 22, reducing the failure rate of the display screen 22, and increasing the service life of the projector.

[0041] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A projector heat dissipation structure, characterized in that, The application relates to a light machine shell (10) which comprises a cavity, a first partition plate (11) arranged in the cavity of the light machine shell (10), an optical assembly (20) arranged in the light machine shell (10), the optical assembly (20) comprising a light source (21), a display screen (22) and a lens (23) arranged in sequence in the light path downstream of the light source (21), a first heat dissipation assembly (30) comprising a first fan (31) arranged in the cavity of the light machine shell (10), wherein the first partition plate (11) is arranged downstream of the air path of the first fan (31) to guide the air of the first fan (31) to blow towards the display screen (22), one side of the first partition plate (11) is provided with a first air guide block (32), the side surface of the first air guide block (32) close to the first fan (31) is an inclined surface to change the direction of part of the air of the first fan (31), and an air duct is arranged between the first air guide block (32) and the first partition plate (11). The optical assembly (20) further comprises a reflecting cup (24), the light source (21) is arranged on the light inlet of the reflecting cup (24), one side of the light expansion opening of the reflecting cup (24) is provided with a first Fresnel lens (25), the first Fresnel lens (25) and the display screen (22) are provided with a heat insulation glass (26) therebetween, and one side of the display screen (22) away from the heat insulation glass (26) is provided with a second Fresnel lens (27). The light machine shell (10) has a first cavity and a second cavity, the first fan (31), the first partition plate (11) and the first air guide block (32) are arranged in the first cavity, the first Fresnel lens (25) and the display screen (22) form a first air duct which communicates the first cavity and the second cavity, and the display screen (22) and the second Fresnel lens (27) form a second air duct which communicates the first cavity and the second cavity. A first heat dissipation device (33) is arranged on the first cavity, one side of the first heat dissipation device (33) is provided with a second fan (34), and the second fan (34) is located outside the first cavity. The second cavity is provided with a third fan (35), a second partition plate (36) and a flow dividing plate (37), one end of the second partition plate (36) is connected to the display screen (22), the other end of the second partition plate (36) is connected to the third fan (35), and the flow dividing plate (37) is arranged downstream of the air path of the third fan (35) to guide the air of the third fan (35) to be divided into two flows and blow to the two sides of the heat insulation glass (26).

2. The projector heat dissipation structure according to claim 1, wherein, Second air guide blocks (38) are arranged on the two sides of the flow dividing plate (37), the side surface of the second air guide blocks (38) close to the third fan (35) is an inclined surface to change the direction of part of the air of the third fan (35), and air ducts are arranged between the second air guide blocks (38) and the second partition plate (36) and between the second air guide blocks (38) and the inner wall of the second cavity.

3. The projector heat dissipation structure according to claim 2, wherein, ​ 4. The projector heat dissipation structure according to claim 3, wherein, ​ 5. The projector heat dissipation structure according to claim 3, wherein, ​ 6. The projector heat dissipation structure according to claim 5, wherein, ​ 7. The projector heat sink structure of claim 6, wherein, The inclination angle of the inclined surface of the first air guide block (32) and the second air guide block (38) ranges from 35° to 75°.

8. The projector heat dissipation structure according to claim 1, wherein, The second heat dissipation assembly (40) comprises a second heat sink (41) arranged on the lamp holder of the light source (21), and fourth fans (42) are arranged on both sides of the second heat sink (41).

9. The projector heat dissipation structure according to claim 1, wherein, The light engine shell (10) comprises a base (12) and a cover (13).

10. A projector characterized by comprising: The projection device heat dissipation structure comprises the projection device heat dissipation structure as claimed in any one of claims 1-9.

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