Projection ray machine

Abstract

The utility model discloses a projection ray machine, and belongs to the technical field of ray machines. A projection light machine comprises a shell, a module cavity is arranged in the shell, a light funnel is arranged at the bottom of the shell, and the projection light machine further comprises a refrigeration sheet fixedly connected to the bottom of the light funnel; the third fan is fixedly connected to the outer side of the shell, a flow guide cavity is formed in the side, close to the third fan, of the shell, and the flow guide cavity communicates with the module cavity; according to the utility model, the refrigeration sheet dissipates heat of the LED lamp beads in the light funnel, the third fan blows air into the module cavity through the flow guide cavity, heat of the Fresnel lens and the LCD in the module cavity is dissipated, heat of the optical module in the shell can be effectively dissipated, and the service life of the projection ray machine is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of optical machines, and in particular to a projection optical machine. Background Art

[0002] The light inside a projection machine typically consists of effective light and stray light. Part of the effective light is used for imaging, while the other part is non-imaging light, which is not needed for imaging. Non-imaging light is separated from the effective light and is absorbed inside the machine and converted into heat. This heat increases the temperature of optical modules such as the light funnel, Fresnel lens, and LCD screen. For fill light needs, fill lights, such as surface-mount LED lamp beads, are also installed inside the machine. When the LED lamp beads are lit, they further exacerbate the rapid temperature increase of the optical module.

[0003] With the development of micro-projector technology, more and more home projectors have entered people's field of vision, and home projectors are also developing in the direction of miniaturization. However, as the size of projectors is getting smaller and smaller, the volume of heat dissipation channels is reduced, resulting in some existing projectors. When working, the temperature of the optical module cannot be quickly dissipated. As the lighting time of the projector increases, some problems will inevitably arise, such as thermal expansion of the fixed glue points causing the optical module parts such as the light funnel, Fresnel lens, and LCD screen to shift from their original positions. As time goes by, the projected image becomes out of focus and increasingly blurred. In severe cases, the equipment may be damaged directly due to the excessive temperature of the optical module. Utility Model Content

[0004] The purpose of the utility model is to solve the problem that the temperature of the optical module cannot dissipate quickly during operation, the projected image becomes out of focus and increasingly blurred, and in severe cases, the equipment is directly damaged due to the over-high temperature of the optical module.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A projection light engine includes a shell, a module cavity is provided inside the shell, a light funnel is provided at the bottom of the shell, and further includes: a cooling plate fixedly connected to the bottom of the light funnel; a third fan fixedly connected to the outside of the shell, and a guide cavity is provided on a side of the shell close to the third fan, wherein the guide cavity is connected to the module cavity.

[0007] In order to dissipate heat for the LED lamp beads, preferably, LED lamp beads are provided inside the light funnel, and the LED lamp beads are fixedly connected to the top of the cooling plate.

[0008] In order to dissipate heat for the LED lamp beads, preferably, a first heat conducting plate is fixedly connected to the bottom of the refrigeration plate, and a first heat sink is fixedly connected to the outside of the shell, wherein a first heat conducting column is fixedly connected between the first heat conducting plate and the first heat sink, and a first fan is fixedly connected to the outside of the shell, and an air outlet of the first fan is opposite to the first heat sink.

[0009] In order to dissipate heat for the Fresnel lens and the LCD screen, preferably, two first card slots and a second card slot are provided inside the module cavity, and the two first card slots are symmetrically arranged on the upper and lower sides of the second card slot, and the Fresnel lens and the LCD screen are respectively installed in the first card slot and the second card slot.

[0010] In order to dissipate heat for the Fresnel lens and the LCD screen, preferably, a guide plate is provided on the third fan, the guide plate is fixedly connected to the guide cavity, a return port is provided on the side of the shell close to the third fan, and cooling fins are installed inside the shell, and the cooling fins are directly opposite the return port.

[0011] In order to dissipate heat from the deflecting plate, further, a deflecting plate is installed inside the shell, and the heat dissipation fins are fixedly connected between the deflecting plate and the inner wall of the shell.

[0012] In order to dissipate heat for the Fresnel lens, LCD screen and refractive plate, further, a second heat conducting plate is fixedly connected to the top of the shell, the second heat conducting plate is in contact with the heat dissipation fins, a second heat sink is fixedly connected to the outside of the shell, a second heat conducting column is fixedly connected between the second heat sink and the second heat conducting plate, a second fan is fixedly connected to the outer wall of the shell, and the air outlet of the second fan is opposite to the second heat sink.

[0013] Compared with the prior art, the present invention provides a projection light machine with the following beneficial effects:

[0014] 1. In this projector, the cooling plate dissipates heat for the LED lamp beads in the light funnel, and the third fan blows air into the module cavity through the guide cavity to dissipate heat for the Fresnel lens and LCD screen in the module cavity. This can effectively dissipate heat for the optical module in the shell, thereby increasing the service life of the projector.

[0015] 2. In this projection light machine, the third fan blows out cold air, and the guide plate guides the cold air from the guide cavity into the module cavity to dissipate heat for the Fresnel lens and LCD screen in the module cavity. At this time, the heat of the cold air rises, and the heat is absorbed when passing through the heat dissipation fins, and the temperature of the air drops. Then, the air returns to its initial position through the return port, so that the cold air circulates continuously in the module cavity for circulating heat dissipation.

[0016] 3. In this projection optical machine, the heat dissipation fins absorb the heat generated by the refraction plate, Fresnel lens and LCD screen, transfer it through the second heat sink, and then introduce it into the second heat sink by the second heat conducting column, thereby increasing the heat dissipation area. At the same time, the second fan dissipates the heat, further improving the heat dissipation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the axonometric structure of a projection optical machine proposed in this utility model. Figure 1 ;

[0018] Figure 2 This is a schematic diagram of the axonometric structure of a projection optical machine proposed in this utility model. Figure 2 ;

[0019] Figure 3 This is a schematic diagram of the cross-sectional structure of a projection light machine proposed in this utility model. Figure 1 ;

[0020] Figure 4 This is a schematic diagram of the cross-sectional structure of a projection light machine proposed in this utility model. Figure 2 ;

[0021] Figure 5 This is a schematic diagram of the cross-sectional structure of a projection light machine proposed in this utility model. Figure 3 .

[0022] In the figure: 1. Shell; 201. Refrigeration fin; 202. First heat conduction plate; 203. First heat sink; 204. First heat conduction column; 205. First fan; 301. Heat sink fin; 302. Second heat conduction plate; 303. Second heat sink; 304. Second heat conduction column; 305. Second fan; 4. Light funnel; 5. LED lamp bead; 6. First card slot; 7. Second card slot; 8. Refraction plate; 901. Third fan; 902. Guide cavity; 903. Guide plate; 904. Return port; 10. Module cavity. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0025] Example:

[0026] Reference Figure 1-Figure 5 An embodiment of the present utility model provides a projection light engine, including a shell 1, a module cavity 10 is provided inside the shell 1, a light funnel 4 is provided at the bottom of the shell 1, and further comprising: a cooling plate 201, fixedly connected to the bottom of the light funnel 4; a third fan 901, fixedly connected to the outside of the shell 1, a guide cavity 902 is provided on a side of the shell 1 close to the third fan 901, the third fan 901 is connected to the module cavity 10 through the guide cavity 902, an LED lamp bead 5 is arranged in the light funnel 4, and a Fresnel lens and an LCD screen are arranged in the module cavity 10.

[0027] Specifically, when the projector light machine is working, the cooling plate 201 dissipates heat for the LED lamp beads 5 in the light funnel 4, and the third fan 901 blows the wind into the module cavity 10 through the guide cavity 902 to dissipate heat for the Fresnel lens and LCD screen in the module cavity 10, which can effectively dissipate heat for the optical module in the shell 1 and improve the service life of the projector light machine.

[0028] An LED lamp bead 5 is provided inside the light funnel 4, and the LED lamp bead 5 is fixedly connected to the top of the refrigeration fin 201. The top of the refrigeration fin 201 is cooled and the bottom is heated. The bottom of the refrigeration fin 201 is fixedly connected to a first heat conducting plate 202, and the outside of the shell 1 is fixedly connected to a first heat sink 203, wherein a first heat conducting column 204 is fixedly connected between the first heat conducting plate 202 and the first heat sink 203, and a first fan 205 is fixedly connected to the outside of the shell 1, and the air outlet of the first fan 205 is opposite to the first heat sink 203.

[0029] Specifically, the heat generated by the LED lamp beads 5 is absorbed by the cooling plate 201, conducted out of the light funnel 4 through the first heat conducting plate 202, and then transferred to the first heat sink 203 through the first heat conducting column 204, thereby increasing the heat dissipation area. The heat is then dissipated by the first fan 205, further improving the heat dissipation efficiency.

[0030] Two first card slots 6 and a second card slot 7 are provided inside the module cavity 10. The two first card slots 6 are symmetrically arranged on the upper and lower sides of the second card slot 7. Fresnel lenses and LCD screens are respectively installed in the first card slot 6 and the second card slot 7. A guide plate 903 is provided on the third fan 901. The guide plate 903 is fixedly connected to the guide cavity 902. A return port 904 is provided on the side of the shell 1 close to the third fan 901. A heat dissipation fin 301 is installed inside the shell 1, and the heat dissipation fin 301 is directly opposite to the return port 904.

[0031] Specifically, the third fan 901 blows out cold air, and the guide plate 903 guides the cold air from the guide cavity 902 into the module cavity 10 to dissipate heat for the Fresnel lens and LCD screen in the module cavity 10. At this time, the heat of the cold air rises, and the heat is absorbed when passing through the heat dissipation fins 301, and the temperature in the air decreases. Then, the air returns to its initial position through the return port 904, so that the cold air circulates continuously in the module cavity 10 for circulating heat dissipation.

[0032] A deflecting plate 8 is installed inside the shell 1, and the heat dissipation fins 301 are fixedly connected between the deflecting plate 8 and the inner wall of the shell 1. The deflecting plate 8 is used to reflect light and also generates heat. The heat dissipation fins 301 that directly release the deflecting plate 8 absorb the heat generated by the deflecting plate 8 and dissipate the heat.

[0033] A second heat conducting plate 302 is fixedly connected to the top of the shell 1, and the second heat conducting plate 302 is in contact with the heat dissipation fins 301. A second heat sink 303 is fixedly connected to the outside of the shell 1, and a second heat conducting column 304 is fixedly connected between the second heat sink 303 and the second heat conducting plate 302. A second fan 305 is fixedly connected to the outer wall of the shell 1, and the air outlet of the second fan 305 is opposite to the second heat sink 303.

[0034] Specifically, the heat dissipation fins 301 absorb the heat generated by the refractive plate 8, the Fresnel lens and the LCD screen, transfer it through the second heat sink 303, and then introduce it into the second heat sink 303 by the second heat conducting column 304, thereby increasing the heat dissipation area. At the same time, the second fan 305 dissipates the heat, further improving the heat dissipation efficiency.

[0035] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A projection light engine, comprising a housing (1), a module cavity (10) being provided inside the housing (1), and a light funnel (4) being provided at the bottom of the housing (1), characterized in that: Also includes: A cooling plate (201) is fixedly connected to the bottom of the light funnel (4); The third fan (901) is fixedly connected to the outside of the shell (1); a guide cavity (902) is provided on a side of the shell (1) close to the third fan (901); and the guide cavity (902) is communicated with the module cavity (10).

2. The projection light engine according to claim 1, characterized in that: An LED lamp bead (5) is provided inside the light funnel (4), and the LED lamp bead (5) is fixedly connected to the top of the refrigeration plate (201).

3. The projection light engine according to claim 1, characterized in that: The bottom of the refrigeration fin (201) is fixedly connected to a first heat conducting plate (202), and the outer side of the housing (1) is fixedly connected to a first heat sink (203). A first heat-conducting column (204) is fixedly connected between the first heat-conducting plate (202) and the first heat sink (203); a first fan (205) is fixedly connected to the outside of the housing (1); and an air outlet of the first fan (205) is opposite to the first heat sink (203).

4. The projection light engine according to claim 1, characterized in that: Two first card slots (6) and a second card slot (7) are provided inside the module cavity (10), and the two first card slots (6) are symmetrically arranged on the upper and lower sides of the second card slot (7), and a Fresnel lens and an LCD screen are respectively installed in the first card slot (6) and the second card slot (7).

5. The projection light engine according to claim 1, characterized in that: The third fan (901) is provided with a guide plate (903), the guide plate (903) is fixedly connected to the guide cavity (902), a return port (904) is provided on a side of the housing (1) close to the third fan (901), and a heat dissipation fin (301) is installed inside the housing (1), and the heat dissipation fin (301) is directly opposite to the return port (904).

6. The projection light engine according to claim 5, characterized in that: A deflecting plate (8) is installed inside the housing (1), and the heat dissipation fins (301) are fixedly connected between the deflecting plate (8) and the inner wall of the housing (1).

7. The projection light engine according to claim 6, characterized in that: A second heat conducting plate (302) is fixedly connected to the top of the shell (1), the second heat conducting plate (302) is in contact with the heat dissipation fins (301), a second heat sink (303) is fixedly connected to the outside of the shell (1), a second heat conducting column (304) is fixedly connected between the second heat sink (303) and the second heat conducting plate (302), and a second fan (305) is fixedly connected to the outer wall of the shell (1), the air outlet of the second fan (305) is opposite to the second heat sink (303).

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