An inner-circulation air duct high-efficiency heat dissipation projector light machine and projector

Abstract

The utility model provides a kind of projector light machine and projector of high efficiency heat dissipation of inner circulation air duct, wherein projector light machine includes shell, light source board, first reflector, lens module, second reflector, projection lens, LCD main radiator, inner fan and LED radiator;The utility model also provides a kind of projector, including shell, still including a kind of projector light machine of high efficiency heat dissipation of inner circulation air duct as described above, a kind of projector light machine of high efficiency heat dissipation of inner circulation air duct is arranged in the inside of shell;By the inside of the air deflector cover at the inner fan air outlet, additional one arc fairlead of included angle greater than 90 degrees, and the included angle of air deflector cover corner is also greater than 90 degrees, so that the corner of air deflector cover and fairlead will not appear airflow vortex phenomenon, effectively improve the efficiency of air flow, and then greatly improve the effect of heat dissipation.

Description

Technical Field

[0001] This utility model relates to the technical field of projection equipment, specifically to a projector optical engine with efficient heat dissipation through an internal circulation air duct, and also provides a projector. Background Technology

[0002] With the widespread use of electronic devices, projectors have gradually entered the public eye. Projectors have advantages such as a large display area and easy portability, and are often used in meetings, teaching, and presentations. At the same time, they are gradually entering homes, and more and more people intend to use projectors to replace televisions as their home audio-visual equipment. However, traditional projectors currently have the following disadvantages:

[0003] 1. In projectors, the LCD screen is the optical component that is particularly sensitive to temperature. However, in conventional projector optical engines, the LCD screen has low heat dissipation efficiency and cannot be cooled down in time, thus affecting the performance of the projector optical engine.

[0004] 2. In conventional projector optical engines, the air guide hood located at the air outlet of the internal fan has a bending angle of less than 90 degrees. This causes airflow vortices to easily form at this bend in the heat dissipation airflow, which in turn consumes fluid energy and affects the heat dissipation effect. Summary of the Invention

[0005] In view of the above-mentioned problems in the prior art, the present invention provides a projector optical engine with efficient heat dissipation through an internal circulation air duct, which is used to overcome the above-mentioned defects in the prior art.

[0006] To achieve the above-mentioned objectives, the technical solution adopted by this utility model is as follows:

[0007] A projector optical engine with efficient heat dissipation through an internal circulation airflow system includes a housing, a light source board, a first reflector, a lens module, a second reflector, a projection lens, an LCD main heat sink, an internal fan, and an LED heat sink.

[0008] The first reflector, the lens module, and the second reflector are disposed inside the housing. A light source board mounting hole is provided on the right side of the lower end of the housing, and the light source board is disposed in the light source board mounting hole. A first heat dissipation vent is provided on the left side of the lower end of the housing. The internal fan is located inside the first heat dissipation vent and is located to the left of the first reflector. The right side of the LCD main heat sink is connected to the first heat dissipation vent.

[0009] A projection port is provided on the right side of the upper end of the housing. The left end of the projection lens is installed inside the projection port. The first reflector is located on the left side of the light source plate, the second reflector is located above the first reflector, the projection lens is located on the right side of the second reflector, the lens module is located between the first and second reflectors, and the left side of the LED heat sink is connected to the outer wall of the light source plate.

[0010] The air outlet of the internal fan is equipped with an air guide hood, and an arc-shaped guide plate is installed inside the air guide hood. The front and rear ends of the guide plate are connected to the front and rear side walls of the air guide hood, respectively.

[0011] The air outlet of the internal fan is connected to the air inlet on the lower left side of the lens module through the air guide cover. The air outlet on the lower right side of the lens module is connected to the air inlet on the upper right side. The air outlet on the upper left side of the lens module is connected to the upper end of the gap between the LCD main heat sink and the internal fan. The air inlet located on the lower end face of the internal fan is connected to the lower end of the gap between the LCD main heat sink and the internal fan.

[0012] In one embodiment, the left side wall of the air guide shroud and the air guide plate are respectively arc-shaped plates protruding to the left, and the included angle between their upper and lower ends is greater than 90 degrees.

[0013] In one embodiment, the LED heat sink includes a heat sink substrate, a heat pipe, a heat sink fin, and an external fan. The heat sink substrate is mounted on the outside of the mounting hole of the light source board, and the light source board is mounted on the inner side wall of the heat sink substrate. One end of the heat pipe is connected to the outer side wall of the heat sink substrate, and the other end is inserted into the interior of the heat sink fin. The external fan is located between the heat sink substrate and the heat sink fin.

[0014] In one embodiment, an LCD sub-heat sink is also included. A second heat dissipation port is provided on the housing at a position opposite to the right end of the lens module, and the left end of the LCD sub-heat sink is installed inside the second heat dissipation port.

[0015] In one embodiment, the right end of the LCD secondary heat sink faces the left end of the external fan, and the two are positioned close to each other.

[0016] In one embodiment, the external fan and the heat sink are arranged side by side below the projection lens, and the right end face of the heat sink is located to the left of the right end face of the projection lens.

[0017] In one embodiment, the lens module includes a lens frame. Inside the lens frame, from top to bottom, are horizontally arranged a rear Fresnel lens, an LCD screen, heat-insulating glass, and a front Fresnel lens. The gap between the rear Fresnel lens and the LCD screen forms a first heat dissipation channel, the gap between the LCD screen and the heat-insulating glass forms a second heat dissipation channel, and the gap between the heat-insulating glass and the front Fresnel lens forms a third heat dissipation channel.

[0018] The air outlet of the internal fan is connected to the air inlet on the left side of the second and third heat dissipation channels through the air guide shroud. The air outlet on the right side of the second and third heat dissipation channels is connected to the air inlet on the right side of the first heat dissipation channel through the LCD auxiliary heat sink. The air outlet on the left side of the first heat dissipation channel is connected to the gap between the LCD main heat sink and the internal fan.

[0019] In one embodiment, the projection lens, the main LCD heat sink, the secondary LCD heat sink, and the heat dissipation substrate are respectively sealed to the housing.

[0020] This utility model also provides a projector, including a housing, characterized in that it further includes a projector optical engine with efficient heat dissipation through an internal circulation air duct as described above, wherein the projector optical engine with efficient heat dissipation through an internal circulation air duct is disposed inside the housing.

[0021] Compared with the prior art, the projector optical engine with efficient heat dissipation through an internal circulation air duct provided by this utility model has the following advantages:

[0022] 1. This utility model provides a projector optical engine with efficient heat dissipation through an internal circulation air duct. An LCD secondary heat sink is added to one side of the air inlet of the external fan. The LCD secondary heat sink is made of aluminum extrusion profile. Taking advantage of the physical property that the thermal conductivity of aluminum extrusion profile is greater than that of die-cast aluminum, the heat dissipation effect is improved. Combined with the inherent LCD main heat sink of the projector optical engine, the heat dissipation effect of the LCD screen is greatly improved through the cooperation of the LCD secondary heat sink and the LCD main heat sink.

[0023] 2. By adding an arc-shaped guide plate with an included angle greater than 90 degrees inside the air guide shroud at the air outlet of the internal fan, and the included angle at the corner of the air guide shroud is also greater than 90 degrees, the phenomenon of airflow vortex will not occur at the corner of the air guide shroud and the guide plate, thereby improving the efficiency of airflow and thus greatly improving the heat dissipation effect. At the same time, under the action of the guide plate, most of the heat dissipation airflow from the internal fan will be guided to the second heat dissipation channel between the LCD screen and the heat insulation glass, further improving the heat dissipation effect on the LCD screen. Attached Figure Description

[0024] Figure 1 This is a first front view schematic diagram of the internal structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the internal structure of the second main view of this utility model. Detailed Implementation

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", 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 are not intended to 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.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0030] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0031] like Figure 1 and 2 As shown, for ease of description, the orientation references of "up", "down", "left", "right", "front" and "rear" in this utility model are attached. Figure 1 The directions shown are for reference only;

[0032] A projector optical engine with efficient heat dissipation via an internal circulation air duct includes a housing 1, a light source board 2, a first reflector 3, a lens module 4, a second reflector 5, a projection lens 6, an LCD main heat sink 7, an internal fan 8, and an LED heat sink 9.

[0033] The first reflector 3, the lens module 4, and the second reflector 5 are disposed inside the housing 1. A light source board mounting hole is provided on the right side of the lower end of the housing 1, and the light source board 2 is disposed in the light source board mounting hole. A first heat dissipation vent is provided on the left side of the lower end of the housing 1, and an internal fan 8 is located inside the first heat dissipation vent and to the left of the first reflector 5. The right side of the LCD main heat sink 7 is connected to the first heat dissipation vent.

[0034] A projection port is provided on the upper right side of the housing 1. The left end of the projection lens 6 is installed inside the projection port. The first reflector 3 is located on the left side of the light source plate 2. The second reflector 5 is located above the first reflector 3. The projection lens 6 is located on the right side of the second reflector 5. The lens module 4 is located between the first reflector 3 and the second reflector 5. The left side of the LED heat sink 9 is connected to the outer wall of the light source plate 2.

[0035] Therefore, the light source emitted by the light source board 2 is reflected upward by the first reflector 3 and processed by the lens module 4 to reach the second reflector 5. The second reflector 5 further reflects the light source into the projection lens 6 to realize the projection operation.

[0036] An air guide shroud 10 is provided at the air outlet of the internal fan 8. An arc-shaped guide plate 11 is provided inside the air guide shroud 10. The front and rear ends of the guide plate 11 are connected to the front and rear side walls of the air guide shroud 10, respectively.

[0037] The air outlet of the inner fan 8 is connected to the air inlet on the lower left side of the lens module 4 through the air guide cover 10. The air outlet on the lower right side of the lens module 4 is connected to the air inlet on the upper right side of the lens module 4. The air outlet on the upper left side of the lens module 4 is connected to the upper end of the gap between the LCD main heat sink 7 and the inner fan 8. The air inlet on the lower end face of the inner fan 8 is connected to the lower end of the gap between the LCD main heat sink 7 and the inner fan 8.

[0038] Therefore, the airflow blown out by the air outlet of the inner fan 8 flows through the space below the lens module 4, the space above the lens module 4, the gap between the LCD main heat sink 7 and the inner fan 8, and finally flows into the inner fan 8 through the air inlet at the bottom of the inner fan 8 to form a circulating heat dissipation air path, thereby removing the heat inside the lens module 4 to achieve the purpose of heat dissipation.

[0039] Furthermore, the left side wall of the air guide shroud 10 and the air guide plate 11 are arc-shaped plates protruding to the left, and the included angle between their upper and lower ends is greater than 90 degrees. In this way, no airflow vortex will appear at the corner of the air guide shroud 10 and the air guide plate 11, which improves the efficiency of airflow and thus greatly improves the heat dissipation effect.

[0040] In this embodiment, the LED heat sink 9 includes a heat sink substrate 901, a heat pipe 902, a heat sink 903, and an external fan 904. The heat sink substrate 901 is installed on the outside of the mounting hole of the light source board, and the light source board 2 is installed on the inner side wall of the heat sink substrate 901. One end of the heat pipe 902 is connected to the outer side wall of the heat sink substrate 901, and the other end is inserted into the inside of the heat sink 903. The external fan 904 is located between the heat sink substrate 901 and the heat sink 903. Therefore, the heat generated when the light source board 2 is working can be directly conducted to the heat sink substrate 901, and then conducted to the heat sink 903 through the heat pipe 902. The airflow generated by the external fan 904 blows the heat generated by the light source board 2 to the outside of the projector optical engine, thereby achieving the purpose of heat dissipation for the light source board 2.

[0041] In this embodiment, an LCD secondary heat sink 12 is also included. A second heat dissipation port is provided on the housing 1 at a position opposite to the right end of the lens module 4. The left end of the LCD secondary heat sink 12 is installed inside the second heat dissipation port. Therefore, the airflow blown out by the air outlet of the internal fan 8 flows sequentially through the space under the lens module 4, the left end of the LCD secondary heat sink 12, the space under the lens module 4, the gap between the LCD main heat sink 7 and the internal fan 8, and finally flows into the internal fan 8 through the air inlet at the lower end of the internal fan 8 to form a circulating heat dissipation air path. With the cooperation of the LCD main heat sink 7 and the LCD secondary heat sink 12, the overall heat dissipation effect is greatly improved.

[0042] Furthermore, the right end of the LCD secondary heat sink 12 faces the left end of the external fan 904, and the two are positioned close to each other. The left end of the external fan 904 is the air inlet end, and the two are positioned close to each other. Therefore, the heat on the LCD secondary heat sink 12 can be quickly conducted to the outside of the projector optical engine through the external fan 904 and the heat sink 903 under the action of the external fan 904, which greatly improves the heat dissipation effect on the LCD screen.

[0043] In this embodiment, the external fan 904 and the heat sink 903 are arranged side by side below the projection lens 6, and the right end face of the heat sink 903 is located to the left of the right end face of the projection lens 6. Therefore, the arrangement of the external fan 904 and the heat sink 903 will not increase the lateral dimension of the entire projector optical engine, making the entire projector optical engine more compact. This ensures that the overall size of the projector will not increase due to the arrangement of the external fan 904 and the heat sink 903, making the overall size of the projector more compact.

[0044] In this embodiment, the lens module 4 includes a lens frame 401. Inside the lens frame 401, from top to bottom, a rear Fresnel lens 402, an LCD screen 403, a heat-insulating glass 404, and a front Fresnel lens 405 are arranged horizontally. The gap between the rear Fresnel lens 402 and the LCD screen 403 forms a first heat dissipation channel 406, the gap between the LCD screen 403 and the heat-insulating glass 404 forms a second heat dissipation channel 407, and the gap between the heat-insulating glass 404 and the front Fresnel lens 405 forms a third heat dissipation channel 408.

[0045] The air outlet of the internal fan 8 is connected to the air inlet on the left side of the second heat dissipation channel 407 and the third heat dissipation channel 408 through the air guide cover 8. The air outlet on the right side of the second heat dissipation channel 407 and the third heat dissipation channel 408 is connected to the air inlet on the right side of the first heat dissipation channel 406 through the LCD auxiliary heat sink 12. The air outlet on the left side of the first heat dissipation channel 406 is connected to the gap between the LCD main heat sink 7 and the internal fan 8.

[0046] Under the action of the guide plate 11, most of the heat dissipation airflow from the internal fan 8 will be guided to the interior of the second heat dissipation channel 407 between the LCD screen 403 and the heat insulation glass 404, thereby increasing the airflow through the lower surface of the LCD screen 403. Since the LCD screen 403 is the more temperature-sensitive optical device, this further improves the heat dissipation effect on the LCD screen 403, thus ensuring that the projector can work stably for a long time. Under the same conditions, by adding this guide plate 11, the airflow velocity inside the second heat dissipation channel 407 is increased by 1.0 m / s, and the surface temperature of the LCD screen 403 is reduced by 1.3 degrees.

[0047] In this embodiment, the projection lens 6, the LCD main heat sink 7, the LCD secondary heat sink 12 and the heat dissipation substrate 901 are respectively sealed to the housing 1, thereby effectively preventing external dust or foreign objects from entering the interior of the housing 1, thus ensuring the projection effect of the projector.

[0048] This utility model also provides a projector, including a housing 13, characterized in that it further includes a projector optical engine with efficient heat dissipation through an internal circulation air duct as described above, wherein the projector optical engine with efficient heat dissipation through an internal circulation air duct is disposed inside the housing 13.

[0049] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A projector optical engine with efficient heat dissipation via an internal circulation air duct, characterized in that, Includes housing, light source board, first reflector, lens module, second reflector, projection lens, LCD main heat sink, internal fan, and LED heat sink. The first reflector, the lens module, and the second reflector are disposed inside the housing. A light source board mounting hole is provided on the right side of the lower end of the housing, and the light source board is disposed in the light source board mounting hole. A first heat dissipation vent is provided on the left side of the lower end of the housing. The internal fan is located inside the first heat dissipation vent and is located to the left of the first reflector. The right side of the LCD main heat sink is connected to the first heat dissipation vent. A projection port is provided on the right side of the upper end of the housing. The left end of the projection lens is installed inside the projection port. The first reflector is located on the left side of the light source plate, the second reflector is located above the first reflector, the projection lens is located on the right side of the second reflector, the lens module is located between the first and second reflectors, and the left side of the LED heat sink is connected to the outer wall of the light source plate. The air outlet of the internal fan is equipped with an air guide hood, and an arc-shaped guide plate is installed inside the air guide hood. The front and rear ends of the guide plate are connected to the front and rear side walls of the air guide hood, respectively. The air outlet of the internal fan is connected to the air inlet on the lower left side of the lens module through the air guide cover. The air outlet on the lower right side of the lens module is connected to the air inlet on the upper right side. The air outlet on the upper left side of the lens module is connected to the upper end of the gap between the LCD main heat sink and the internal fan. The air inlet located on the lower end face of the internal fan is connected to the lower end of the gap between the LCD main heat sink and the internal fan.

2. The projector optical engine with efficient heat dissipation via an internal circulation air duct according to claim 1, characterized in that, The left side wall of the air guide shroud and the air guide plate are arc-shaped plates that protrude to the left, and the included angle between their upper and lower ends is greater than 90 degrees.

3. The projector optical engine with high-efficiency heat dissipation through an internal circulation air duct according to claim 1, characterized in that, The LED heat sink includes a heat sink substrate, a heat pipe, a heat sink fin, and an external fan. The heat sink substrate is installed on the outside of the mounting hole of the light source board, and the light source board is installed on the inner side wall of the heat sink substrate. One end of the heat pipe is connected to the outer side wall of the heat sink substrate, and the other end is inserted into the inside of the heat sink fin. The external fan is located between the heat sink substrate and the heat sink fin.

4. The projector optical engine with high-efficiency heat dissipation through an internal circulation air duct according to claim 3, characterized in that, It also includes an LCD secondary heat sink, and a second heat dissipation port is provided on the housing at a position opposite to the right end of the lens module. The left end of the LCD secondary heat sink is installed inside the second heat dissipation port.

5. The projector optical engine with high-efficiency heat dissipation through an internal circulation air duct according to claim 4, characterized in that, The right end of the LCD secondary heat sink faces the left end of the external fan, and the two are positioned close to each other.

6. The projector optical engine with high-efficiency heat dissipation through an internal circulation air duct according to claim 5, characterized in that, The external fan and the heat sink are arranged side by side below the projection lens, and the right end face of the heat sink is located to the left of the right end face of the projection lens.

7. The projector optical engine with high-efficiency heat dissipation through an internal circulation air duct according to claim 4, characterized in that, The lens module includes a lens frame. Inside the lens frame, from top to bottom, are horizontally arranged a rear Fresnel lens, an LCD screen, heat-insulating glass, and a front Fresnel lens. The gap between the rear Fresnel lens and the LCD screen forms a first heat dissipation channel, the gap between the LCD screen and the heat-insulating glass forms a second heat dissipation channel, and the gap between the heat-insulating glass and the front Fresnel lens forms a third heat dissipation channel. The air outlet of the internal fan is connected to the air inlet on the left side of the second and third heat dissipation channels through the air guide shroud. The air outlet on the right side of the second and third heat dissipation channels is connected to the air inlet on the right side of the first heat dissipation channel through the LCD auxiliary heat sink. The air outlet on the left side of the first heat dissipation channel is connected to the gap between the LCD main heat sink and the internal fan.

8. The projector optical engine with high-efficiency heat dissipation through an internal circulation air duct according to claim 4, characterized in that, The projection lens, LCD main heat sink, LCD secondary heat sink, and heat dissipation substrate are respectively sealed to the housing.

9. A projector, comprising a housing, characterized in that, It also includes a projector optical engine with efficient heat dissipation through an internal circulation duct as described in any one of claims 1-8, wherein the projector optical engine with efficient heat dissipation through an internal circulation duct is disposed inside the housing.

Images