一种投影镜头无凝露的投影仪光机及投影仪

Abstract

本实用新型提供的一种投影镜头无凝露的投影仪光机及投影仪，其中投影仪光机包括壳体、光源板、第一反射镜、镜片模组、第二反射镜，投影镜头、LCD主散热器、内风机、LCD副散热器和LED散热器；本实用新型还提供一种投影仪，包括外壳，还包括如上述所述的一种投影镜头无凝露的投影仪光机，所述的一种投影镜头无凝露的投影仪光机设置在外壳的内部，外壳上与LCD主散热器相对的位置处设置有进风口、与LED散热器相对的位置处设置有出风口，通过在光机现有内循环风道上增设一个支风道，将内循环风道中的热空气从支风道导入到投影镜头上的凝露区，进而达到吹除水汽，规避凝露产生的目的。

Claims

1. A projection optical system without condensation of a projector light machine, characterized by, Includes a housing, light source board, first reflector, lens module, second reflector, projection lens, LCD main heat sink, internal fan, LCD secondary heat sink, 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. A second heat dissipation vent is provided on the housing at a position opposite to the right end of the lens module. The left end of the LCD sub-heater is installed inside the second heat dissipation vent. A branch air duct is provided on the housing above the left end of the LCD sub-heater. The lower end of the branch air duct faces the left end of the LCD sub-heater, and the upper end faces the condensation area on the projection lens. The airflow blown out from the air outlet of the internal fan flows sequentially through the space under the lens module, the left end of the LCD auxiliary heat sink, the space under the lens module, the gap between the LCD main heat sink and the internal fan, and finally flows into the internal fan from the air inlet at the lower end of the internal fan to form the main heat dissipation air path. The airflow blown out from the air outlet of the internal fan flows sequentially through the space under the lens module, the left end of the LCD secondary heat sink, the branch air duct, the condensation area on the projection lens, the gap between the lens module and the housing, the gap between the LCD main heat sink and the internal fan, and finally flows into the internal fan from the air inlet at the lower end of the internal fan to form a secondary heat dissipation air path.

2. The projector light engine according to claim 1, wherein The branch air duct is inclined, and a light-blocking plate is installed inside it at a position above the left end of the LCD secondary heat sink to prevent light escaping from the lens module from shining on the projection lens.

3. The condensation-free projector light machine of claim 1, wherein 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 light source mounting hole, 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 inside of the heat sink fin. The external fan is located between the heat sink substrate and the heat sink fin.

4. The condensation-free projector light machine of claim 3, wherein 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.

5. The condensation-free projector light machine of claim 4, wherein 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.

6. The condensation-free projector light machine of claim 1, wherein 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 provided with an air guide shroud. 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 and the lower end of the branch air duct 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.

7. The condensation-free projector light machine of claim 6, wherein The air guide shroud has an arc-shaped guide plate inside, and the front and rear ends of the guide plate are connected to the front and rear side walls of the air guide shroud, respectively.

8. The condensation-free projector light machine of claim 7, wherein, 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.

9. The condensation-free projector light machine of claim 3, wherein The projection lens, LCD main heat sink, LCD secondary heat sink, and heat dissipation substrate are respectively sealed to the housing.

10. A projector, comprising a housing, characterized in that, It also includes a projector optical engine with a condensation-free projection lens as described in any one of claims 1-9, wherein the projector optical engine with a condensation-free projection lens is disposed inside the housing, and an air inlet is provided on the housing at a position opposite to the LCD main heat sink and an air outlet is provided at a position opposite to the LED heat sink.

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