Heat dissipation structure of closed projection ray machine

Abstract

The utility model discloses a closed projection ray machine heat dissipation structure, which comprises a shell, a lens, an LCD screen and a light source, a first radiator is arranged in the shell and divides the interior of the shell into an inner circulation area and an outer circulation area, and a plurality of heat dissipation fins are arranged on the upper surface and the lower surface of the first radiator. The heat dissipation fins extend to the inner circulation area and the outer circulation area respectively, the light source is arranged on one side of the inner circulation area, the lens is arranged on the surface of the shell and located on the other side of the inner circulation area, the LCD screen is arranged between the light source and the lens, an air inlet and an air outlet are formed in the two sides of the outer circulation area respectively, an air inlet fan is arranged on one side of the air inlet, and a second heat dissipation device is arranged at the air outlet. The second radiator is attached to the light source. According to the heat dissipation structure of the closed projection ray machine, the inside of the shell is separated, heat dissipation is achieved, meanwhile, the dustproof effect of an LCD screen, a light source and a lens is guaranteed, and the service life is prolonged.

Description

Technical Field

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

[0002] LCD projectors can be divided into two types: liquid crystal panels and liquid crystal light valves. The former is the main product on the market now. Liquid crystal is a non-luminescent material that is between liquid and solid. Its working properties are significantly affected by temperature. The operating temperature is usually controlled between -55℃ and +77℃. Therefore, it is necessary to dissipate heat inside the LCD projector when it is working to avoid the temperature from being too high and affecting the working effect.

[0003] The most common heat dissipation method is air cooling, which uses a fan to draw outside air into the LCD projector. The airflow carries away the heat inside the casing, thus achieving the purpose of heat dissipation. However, when outside air enters the LCD projector, it also brings in dust and other impurities, which can easily accumulate inside the LCD projector. Over time, this can affect the lifespan of internal electronic components, light sources, screens, and so on.

[0004] Therefore, a closed structure is required to enclose the main light source, screen and other components, while ensuring that heat can be dissipated smoothly. Utility Model Content

[0005] The purpose of this invention is to provide a sealed projection optical engine heat dissipation structure that improves heat dissipation by separating the interior of the housing, while ensuring the dustproof effect of the LCD screen, light source and lens, thereby increasing service life.

[0006] The technical solution adopted by the heat dissipation structure of the sealed projection optical engine disclosed in this utility model is:

[0007] A sealed projection optical engine heat dissipation structure includes a housing, a lens, an LCD screen, and a light source. The housing contains a first heat sink that divides the interior into an inner circulation zone and an outer circulation zone. The upper and lower surfaces of the first heat sink are each provided with a plurality of heat dissipation fins extending into the inner and outer circulation zones, respectively. The light source is located on one side of the inner circulation zone, and the lens is located on the housing surface on the other side of the inner circulation zone. The LCD screen is located between the light source and the lens. The outer circulation zone has an air inlet and an air outlet on each side. An intake fan is located on one side of the air inlet, and a second heat sink is located at the air outlet, with the second heat sink in contact with the light source.

[0008] As a preferred embodiment, the inner circulation zone is equipped with a circulation fan, which is a centrifugal fan. The circulation fan is located on one side of the lower end of the LCD screen, and there is a gap between the upper end of the LCD screen and the housing. The air discharged by the circulation fan flows from one side of the LCD screen to the upper end of the LCD screen, and then flows back to the circulation fan from the other side of the LCP screen.

[0009] As a preferred embodiment, the circulating fan is positioned above the first heat sink, and there is a gap between the circulating fan and the first heat sink.

[0010] As a preferred embodiment, a light channel is provided between the LCD screen and the light source, the light channel having a cone-shaped structure and gradually narrowing towards the light source.

[0011] As a preferred embodiment, the air intake fan is a centrifugal fan, the side of the air intake fan is connected to the air inlet, and the upper part of the housing extends above the air intake fan, with the lens correspondingly positioned above the air intake fan.

[0012] As a preferred embodiment, a reflector is provided between the lens and the LCD screen, the angle between the reflector and the LCD screen is 45 degrees, and the angle between the reflector and the lens axis is 45 degrees.

[0013] As a preferred embodiment, the second radiator is provided with several heat dissipation fins on the side near the air outlet.

[0014] As a preferred embodiment, a control board is provided on one side of the housing, and the control board is fixedly connected to the housing.

[0015] The beneficial effects of the sealed projection optical engine heat dissipation structure disclosed in this utility model are as follows: The LCD screen projects the image from the lens through a light source, and the LCD screen, light source, and lens are all located in the inner circulation area of ​​the housing. Thus, the heat generated by the light source is mainly concentrated in the inner circulation area. Part of the heat in the inner circulation area is transferred to the first heat sink through the heat dissipation fins on the upper surface of the first heat sink, while part of the heat generated by the light source is also transferred to the second heat sink, thereby achieving heat dissipation in the inner circulation area. External air is drawn in from the air inlet by the intake fan and enters the outer circulation area of ​​the housing. The air passes through the heat dissipation fins on the lower surface of the first heat sink, which carries away the heat from the surface of the first heat sink. When the air is discharged from the air outlet, it also passes through the second heat sink, which carries away the heat from the surface of the second heat sink as well, thus achieving secondary heat dissipation and improving the heat dissipation effect. The above structure divides the interior of the casing, ensuring that the inner circulation zone is a sealed structure while the outer circulation zone remains connected to the outside. The first and second radiators dissipate heat from the inner circulation zone, and the intake fan increases the airflow speed in the outer circulation zone, thereby achieving a heat dissipation effect. At the same time, it prevents air from entering the inner circulation zone, ensuring the dustproof effect of the inner circulation zone and improving the overall service life. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a sealed projection optical engine heat dissipation structure according to the present invention.

[0017] Figure 2 This is a schematic diagram of the internal structure of a sealed projection optical engine heat dissipation structure according to the present invention.

[0018] Figure 3 This is a cross-sectional view of a sealed projection optical engine heat dissipation structure according to the present invention.

[0019] Figure 4 This is a schematic diagram of the airflow direction of a sealed projection optical engine heat dissipation structure according to the present invention. Detailed Implementation

[0020] The present invention will be further described and illustrated below with reference to specific embodiments and the accompanying drawings:

[0021] Please refer to Figure 1 and Figure 2A sealed projection optical engine heat dissipation structure includes a housing 10, a lens 20, an LCD screen 30, and a light source 40. A control board 18 is provided on one side of the housing 10 and is fixedly connected to the housing 10. A first heat sink 50 is provided inside the housing 10, which divides the interior of the housing 10 into an inner circulation zone 11 and an outer circulation zone 12. The upper and lower surfaces of the first heat sink 50 are provided with a plurality of heat dissipation fins 51, which extend to the inner circulation zone 11 and the outer circulation zone 12, respectively. The light source 40 is located on one side of the inner circulation zone 11, the lens 20 is located on the surface of the housing 10 and on the other side of the inner circulation zone, and the LCD screen 30 is located between the light source 40 and the lens 20. An air inlet 13 and an air outlet 14 are provided on both sides of the outer circulation zone 12, respectively. An air intake fan 15 is provided on one side of the air inlet 13, and a second heat sink 16 is provided on the air outlet 14, which is in contact with the light source 40.

[0022] The LCD screen 30 projects the image from the lens 20 through the light source 40. The LCD screen 30, the light source 40, and the lens 20 are all located in the inner circulation zone 11 of the housing 10. As a result, the heat generated by the light source 40 is mainly concentrated in the inner circulation zone 11. Some of the heat in the inner circulation zone 11 is transferred to the first heat sink 50 through the heat dissipation fins 51 on the upper surface of the first heat sink 50. Some of the heat generated by the light source 40 is also transferred to the second heat sink 16, thereby achieving heat dissipation of the inner circulation zone 11.

[0023] Please refer to Figure 3 and Figure 4 , Figure 4 The arrows indicate the direction of airflow. External air is drawn in through the intake fan 15 from the air inlet 13 and enters the outer circulation zone 12 of the casing 10. The air then passes through the heat dissipation fins 51 on the lower surface of the first heat sink 50, carrying away the heat from the surface of the first heat sink 50. When the air is discharged from the air outlet 14, it also passes through the second heat sink 16, carrying away the heat from the surface of the second heat sink 16 as well, thus achieving secondary heat dissipation and improving the heat dissipation effect.

[0024] The above structure divides the interior of the housing 10, ensuring that the inner circulation zone 11 is a sealed structure while the outer circulation zone 12 remains connected to the outside. The heat in the inner circulation zone 11 is dissipated through the first radiator 50 and the second radiator 16, and the air intake fan 15 increases the airflow speed in the outer circulation zone 12, thereby achieving the effect of heat dissipation. At the same time, it also prevents air from entering the inner circulation zone 11, ensuring the dustproof effect of the inner circulation zone 11 and improving the overall service life.

[0025] In the above scheme, a circulating fan 17 is provided in the inner circulation zone 11. The circulating fan 17 is a centrifugal fan and is located on one side of the lower end of the LCD screen 30. There is a gap between the upper end of the LCD screen 30 and the housing 10. The air discharged by the circulating fan 17 flows from one side of the LCD screen 30 to the upper end of the LCD screen 30, and then flows back to the circulating fan 17 from the other side of the LCD screen. The circulating fan 17 is located above the first heat sink 50, and there is a gap between the circulating fan 17 and the first heat sink 50.

[0026] Please refer to Figure 4 The air in the inner circulation zone 11 is circulated by the circulating fan 17, and the use of a centrifugal fan can effectively reduce the thickness of the overall structure. Air can be drawn in by the circulating fan 17, flow past one side of the LCD screen 30, then pass over the LCD screen 30, and flow past the other side of the LCD screen 30, thereby achieving the purpose of heat dissipation for the LCD screen 30. Finally, the hot air exchanges heat with the heat dissipation fins 51 of the first heat sink 50 below the circulating fan 17, thereby cooling the internal air in the inner circulation zone 11 and transferring the heat to the outer circulation zone 12. The external airflow in the outer circulation zone 12 is used for external heat dissipation, ensuring a better overall heat dissipation effect.

[0027] A light channel 31 is provided between the LCD screen 30 and the light source 40. The light channel 31 has a conical structure and gradually narrows towards the light source 40. The light channel 31 allows the light from the light source 40 to enter the LCD screen 30 more parallelly, resulting in a better projection effect. Furthermore, since the light channel 31 is located on one side of the LCD screen 30, it can also be cooled by the air driven by the circulating fan 17.

[0028] The intake fan 15 is a centrifugal fan. The side of the intake fan 15 is connected to the air inlet 13, and the upper part of the housing 10 extends above the intake fan 15. The lens 20 is correspondingly positioned above the intake fan 15. Using a centrifugal fan can also reduce the overall size. Furthermore, by utilizing the centrifugal fan structure of the intake fan 15, air can be drawn in from both the top and bottom of the intake fan 15, and then the air is discharged into the external circulation area 12 through the side. This also increases the airflow below the lens 20, which can also help to partially dissipate heat from the lens 20.

[0029] A reflector 32 is provided between the lens 20 and the LCD screen 30. The angle between the reflector 32 and the LCD screen 30 is 45 degrees, and the angle between the reflector 32 and the axis of the lens 20 is 45 degrees, so that the projector forms a horizontal projection structure, reducing the overall length and making the projector more compact.

[0030] The second radiator 16 is provided with several heat dissipation fins on the side near the air outlet 14. The heat dissipation fins increase the airflow area, thereby improving the heat dissipation effect of the second radiator 16.

[0031] This invention provides a sealed projection optical engine heat dissipation structure. The LCD screen projects the image from the lens through a light source. The LCD screen, light source, and lens are all located in the inner circulation zone of the housing. Thus, the heat generated by the light source is mainly concentrated in the inner circulation zone. Some of the heat from the inner circulation zone is transferred to the first heat sink through the heat dissipation fins on the upper surface of the first heat sink. Some of the heat generated by the light source is also transferred to the second heat sink, thereby achieving heat dissipation in the inner circulation zone. An intake fan draws in external air from the air inlet, and the air enters the outer circulation zone of the housing. The air passes through the heat dissipation fins on the lower surface of the first heat sink, carrying away the heat from the surface of the first heat sink. When the air is exhausted from the air outlet, it also passes through the second heat sink, carrying away the heat from the surface of the second heat sink as well, achieving secondary heat dissipation and improving the heat dissipation effect. The above structure divides the interior of the casing, ensuring that the inner circulation zone is a sealed structure while the outer circulation zone remains connected to the outside. The first and second radiators dissipate heat from the inner circulation zone, and the intake fan increases the airflow speed in the outer circulation zone, thereby achieving a heat dissipation effect. At the same time, it prevents air from entering the inner circulation zone, ensuring the dustproof effect of the inner circulation zone and improving the overall service life.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A sealed heat dissipation structure for a projection optical engine, characterized in that, The device includes a housing, a lens, an LCD screen, and a light source. The housing contains a first heat sink that divides the interior into an inner circulation zone and an outer circulation zone. The upper and lower surfaces of the first heat sink are each provided with several heat dissipation fins that extend into the inner and outer circulation zones, respectively. The light source is located on one side of the inner circulation zone. The lens is located on the housing surface and on the other side of the inner circulation zone. The LCD screen is located between the light source and the lens. Air inlets and outlets are located on both sides of the outer circulation zone. An intake fan is located on one side of the air inlet, and a second heat sink is located at the air outlet, with the second heat sink being attached to the light source.

2. The heat dissipation structure for a projection exposure apparatus according to claim 1, wherein The inner circulation zone is equipped with a circulation fan, which is a centrifugal fan. The circulation fan is located on one side of the lower end of the LCD screen, and there is a gap between the upper end of the LCD screen and the housing. The air discharged by the circulation fan flows from one side of the LCD screen to the upper end of the LCD screen, and then flows back to the circulation fan from the other side of the LCD screen.

3. The heat dissipation structure for a projection exposure apparatus according to claim 2, wherein The circulating fan is positioned above the first heat sink, and there is a gap between the circulating fan and the first heat sink.

4. The heat dissipation structure for a projection exposure apparatus according to claim 2, wherein A light channel is provided between the LCD screen and the light source. The light channel has a cone-shaped structure and gradually narrows towards the light source.

5. The heat dissipation structure for a projection exposure apparatus according to claim 1, wherein The intake fan is a centrifugal fan, the side of the intake fan is connected to the air inlet, and the upper part of the housing extends above the intake fan, with the lens correspondingly positioned above the intake fan.

6. The heat dissipation structure for a projection exposure apparatus according to claim 5, wherein A reflector is provided between the lens and the LCD screen, the angle between the reflector and the LCD screen is 45 degrees, and the angle between the reflector and the lens axis is 45 degrees.

7. The heat dissipation structure for a projection exposure apparatus according to claim 1, wherein The second radiator has several heat dissipation fins on the side near the air outlet.

8. The heat dissipation structure for a projection exposure apparatus according to claim 1, wherein A control board is provided on one side of the housing, and the control board is fixedly connected to the housing.

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