Monolithic totally-enclosed LCD projection heat dissipation system

Abstract

The utility model discloses a sheet-type totally-enclosed LCD projection heat dissipation system which adopts an internal circulation heat dissipation system and an external circulation heat dissipation system. The internal circulation heat dissipation system comprises an internal circulation closed air duct arranged in a cavity of the ray machine body, a centrifugal fan located in the internal circulation closed air duct and heat exchange radiators arranged on the two sides of the ray machine body and communicated with the internal circulation closed air duct, and the external circulation heat dissipation system comprises an LED heat dissipation fan and an LED radiator connected with the LED heat dissipation fan. And the LED cooling fan is arranged at the rear end of the ray machine main body and is opposite to the outlet of the internal circulation closed air duct. According to the utility model, the heat dissipation efficiency of the liquid crystal panel and the optical device can be better improved, and meanwhile, the fully-enclosed optical machine is more convenient for dust removal and maintenance, so that the service life of the projector is greatly prolonged.

Description

Technical Field

[0001] The utility model relates to the field of heat dissipation of LCD projection equipment, and in particular discloses a single-chip fully enclosed LCD projection heat dissipation system. Background Art

[0002] Using LCD (Liquid Crystal Projectors based on liquid crystal display (LCD) technology have been on the market since the late 1980s and early 1990s, marking decades of development. Despite these improvements, many shortcomings have been addressed, such as size, luminous flux output, appearance, color, and quality stability. However, due to the fact that the transmittance of LCD screens is only 5-11% (depending on the manufacturer and model), their efficiency is also only 5-11%. The remaining 89-95% of the light is concentrated and absorbed by the LCD screen (about 1% is reflected by the LCD screen), which manifests as heat, causing the LCD screen to heat up very high. (The temperature limit of LCD screens varies from manufacturer to manufacturer, but generally does not exceed 80°C.) The brightness of a projector is a crucial indicator of its performance. Although the transmittance of LCD screens is constantly improving with technological advancements, it remains very slow. To increase the brightness of a projector, the brightness of the light source is usually increased, thereby increasing the overall brightness of the projector. The higher the light source brightness, the higher the LCD screen temperature. Increasing the light source brightness is now technically easy to achieve, but controlling the LCD screen temperature has become a bottleneck for the entire projection system, thus limiting the initial brightness of the light source.

[0003] Typically, existing single-chip LCD projectors mostly adopt an open structure (all optical lenses including the LCD are directly connected to the air outside the projector housing). The purpose is to naturally dissipate heat from each lens, especially the LCD panel. Since the optical components are directly connected to the air, floating dust in the air will settle on the surface of each optical component. As the amount of dust increases, the optical indicators of the projector will become lower and lower. At the same time, the heat dissipation efficiency of each optical component will also become worse and worse, eventually leading to damage to the projector. Therefore, the service life of an open projector depends entirely on the cleanliness of the environment. Utility Model Content

[0004] The utility model provides a single-chip fully enclosed LCD projection heat dissipation system, aiming to solve at least one of the above-mentioned defects of the existing single-chip LCD projector.

[0005] The utility model relates to a single-chip fully enclosed LCD projection heat dissipation system, comprising an internal circulation heat dissipation system arranged inside an optical machine main body and an external circulation heat dissipation system arranged outside the optical machine main body. The internal circulation heat dissipation system comprises an internal circulation closed air duct arranged inside a cavity of the optical machine main body, a centrifugal fan located in the internal circulation closed air duct, and a heat exchange radiator arranged on both sides of the optical machine main body and connected to the internal circulation closed air duct. The external circulation heat dissipation system comprises an LED heat dissipation fan and an LED radiator connected to the LED heat dissipation fan. The LED heat dissipation fan is arranged at the rear end of the optical machine main body and is arranged opposite to the outlet of the internal circulation closed air duct.

[0006] Furthermore, the optical machine body includes a lens, an imaging Fresnel lens, an LCD screen, heat-insulating glass and a polarizing film, an illumination Fresnel lens, a light cone, and a light source LED, which are arranged in sequence. The inner circulation closed air duct includes a first circulation closed air duct and a second circulation closed air duct connected to the first circulation closed air duct. The first circulation closed air duct is located between the imaging Fresnel lens and the LCD screen, and the second circulation closed air duct is located between the LCD screen (13) and the illumination Fresnel lens (15). The heat-insulating glass and the polarizing film (14) are located in the middle of the second circulation closed air duct.

[0007] Furthermore, the optical machine body includes a complete machine casing, and an air inlet and an air outlet arranged on the complete machine casing. The internal circulation closed air duct is arranged in the complete machine casing, the inlet of the internal circulation closed air duct is connected to the air inlet, and the air outlet is arranged opposite to the LED radiator.

[0008] Furthermore, the heat exchange radiator includes a first heat exchange radiator and a second heat exchange radiator, and the first heat exchange radiator and the second heat exchange radiator are respectively arranged on the left and right sides of the optical machine body.

[0009] Furthermore, the air inlet includes a first air inlet and a second air inlet, the first heat exchange radiator is arranged opposite to the first air inlet, and the second heat exchange radiator is arranged opposite to the second air inlet.

[0010] Furthermore, the first heat exchange radiator and the second heat exchange radiator are respectively arranged on the left and right sides of the optical machine main body with the center line of the optical machine main body as the axis of symmetry.

[0011] Furthermore, both the first heat exchange radiator and the second heat exchange radiator are provided with heat dissipation fins.

[0012] Furthermore, the LED cooling fan includes a first LED cooling fan and a second LED cooling fan, the LED radiator includes a first LED radiator and a second LED radiator, the first LED cooling fan is connected to the first LED radiator, and the second LED cooling fan is connected to the second LED radiator.

[0013] Furthermore, the air outlet includes a first air outlet and a second air outlet, the first LED heat dissipation fan is arranged opposite to the first air outlet, and the second LED heat dissipation fan is arranged opposite to the second air outlet.

[0014] Furthermore, the LED heat sink is connected to the optical machine body through a heat conduction pipe, and the LED heat sink is arranged close to the light source LED.

[0015] The beneficial effects achieved by the utility model are:

[0016] The present invention provides a single-chip, fully enclosed LCD projection heat dissipation system, which utilizes an internal circulation heat dissipation system and an external circulation heat dissipation system. The internal circulation heat dissipation system includes an internal circulation closed air duct disposed within the cavity of an optical machine body, a centrifugal fan located within the internal circulation closed air duct, and a heat exchange radiator disposed on both sides of the optical machine body and connected to the internal circulation closed air duct. The external circulation heat dissipation system includes an LED heat dissipation fan and an LED heat sink connected to the LED heat dissipation fan. The LED heat dissipation fan is disposed at the rear end of the optical machine body and is arranged opposite the outlet of the internal circulation closed air duct. The single-chip, fully enclosed LCD projection heat dissipation system provided by the present invention can improve the heat dissipation efficiency of the liquid crystal panel and optical components. At the same time, the fully enclosed optical machine also facilitates dust removal and maintenance, greatly extending the service life of the projector. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of an embodiment of a single-chip fully enclosed LCD projection heat dissipation system of the present invention;

[0018] Figure 2 This is a working principle diagram of the heat dissipation wind direction of the internal circulation heat dissipation system in a single-chip fully enclosed LCD projection heat dissipation system of the utility model;

[0019] Figure 3 This is a schematic diagram of the optical machine with housing of the utility model;

[0020] Figure 4 This is a working principle diagram of the heat dissipation wind direction of the internal and external circulation heat dissipation system of a single-chip fully enclosed LCD projection heat dissipation system of the utility model.

[0021] Description of Figure Numbers:

[0022] 10. Optical machine body; 20. Centrifugal fan; 30. Heat exchange radiator; 40. LED cooling fan; 50. LED radiator; 11. Lens; 12. Imaging Fresnel lens; 13. LCD screen; 14. Heat-insulating glass and polarizing film; 15. Illuminating Fresnel lens; 16. Light cone; 17. Light source LED; 181. Machine housing; 182. Air inlet; 183. Air outlet; 31. First heat exchange radiator; 32. Second heat exchange radiator; 1821. First air inlet; 1822. Second air inlet; 41. First LED cooling fan; 42. Second LED cooling fan; 1831. First air outlet; 1832. Second air outlet; 51. First LED radiator; 52. Second LED radiator; 60. Heat conduction pipe. DETAILED DESCRIPTION

[0023] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0024] like Figure 1 and Figure 2 As shown, the first embodiment of the present invention provides a single-chip fully enclosed LCD projection cooling system, comprising an internal circulation cooling system disposed within the optical engine body 10 and an external circulation cooling system disposed outside the optical engine body 10. The internal circulation cooling system comprises an internal circulation enclosed air duct disposed within the cavity of the optical engine body 10, a centrifugal fan 20 located within the internal circulation enclosed air duct, and a heat exchange radiator 30 disposed on both sides of the optical engine body 10 and connected to the internal circulation enclosed air duct. The external circulation cooling system comprises an LED cooling fan 40 and an LED radiator 50 connected to the LED cooling fan 40. The LED cooling fan 40 is disposed at the rear end of the optical engine body 10 and is arranged opposite the outlet of the internal circulation enclosed air duct. The centrifugal fan 20, the heat exchange radiator 30, the LED cooling fan 40, and the LED radiator 50 can utilize existing equipment.

[0025] Further, see Figures 1 to 4The single-chip, fully enclosed LCD projection heat dissipation system provided in this embodiment comprises an optical machine body 10 including, in sequence, a lens 11, an imaging Fresnel lens 12, an LCD screen 13, heat-insulating glass and polarizing film 14, an illumination Fresnel lens 15, a light cone 16, and a light source LED 17. The internal closed air duct includes a first closed air duct and a second closed air duct connected to the first closed air duct. The first closed air duct is located between the imaging Fresnel lens 12 and the LCD screen 13, and the second closed air duct is located between the LCD screen 13 and the illumination Fresnel lens 15. The heat-insulating glass and polarizing film 14 are located in the middle of the second closed air duct. The single-chip, fully enclosed LCD projection heat dissipation system provided in this embodiment utilizes the first and second closed air ducts, which circulate air, to dissipate heat from the imaging Fresnel lens 12, the LCD screen 13, the heat-insulating glass and polarizing film 14, and the illumination Fresnel lens 15, thereby improving heat dissipation efficiency.

[0026] Preferably, see Figures 1 to 4The single-chip, fully enclosed LCD projection cooling system provided in this embodiment comprises a main body 10 of the optical machine, including a housing 181, an air inlet 182, and an air outlet 183 disposed on the housing 181. An internal circulation closed air duct is disposed within the housing 181, the inlet of the internal circulation closed air duct being connected to the air inlet 182, and the air outlet 183 being disposed opposite the LED radiator 50. Specifically, the heat exchange radiator 30 comprises a first heat exchange radiator 31 and a second heat exchange radiator 32, which are disposed on the left and right sides of the main body 10, respectively. The air inlet 182 comprises a first air inlet 1821 and a second air inlet 1822, with the first heat exchange radiator 31 disposed opposite the first air inlet 1821, and the second heat exchange radiator 32 disposed opposite the second air inlet 1822. The first heat exchange radiator 31 and the second heat exchange radiator 32 are respectively arranged on the left and right sides of the optical machine body 10 with the center line of the optical machine body 10 as the axis of symmetry. Of course, the positions of the first heat exchange radiator 31 and the second heat exchange radiator 32 do not necessarily have to be completely symmetrical. The first heat exchange radiator 31 and the second heat exchange radiator 32 are both provided with cooling fins. The LED cooling fan 40 includes a first LED cooling fan 41 and a second LED cooling fan 42. The LED radiator 50 includes a first LED radiator 51 and a second LED radiator 52. The first LED cooling fan 41 is connected to the first LED radiator 51, and the second LED cooling fan 42 is connected to the second LED radiator 52. The air outlet 183 includes a first air outlet 1831 and a second air outlet 1832. The first LED cooling fan 41 is arranged opposite to the first air outlet 1831, and the second LED cooling fan 42 is arranged opposite to the second air outlet 1832. The LED heat sink 50 is connected to the optical engine body 10 via a heat conducting pipe 60 and is positioned near the light source LED 17. The single-chip, fully enclosed LCD projection cooling system provided in this embodiment, through the integration of an internal and external circulation cooling system, can significantly improve the heat dissipation efficiency of the LCD panel and optical components. Furthermore, the fully enclosed optical engine also facilitates dust removal and maintenance, significantly extending the projector's service life.

[0027] like Figures 1 to 4 As shown, the single-chip fully enclosed LCD projection heat dissipation system provided in this embodiment has the following working principles:

[0028] Please see Figure 2The main function of the heat-insulating glass is to allow the light emitted from the imaging Fresnel lens 12 to pass through to the LCD screen 13, while blocking part of its heat radiation. The function of the polarizing film is to pass the light of the polarization state that can be used to control the LCD screen 13, and to block and reflect the light of other polarization states. The main function of the imaging Fresnel lens 12 is to converge the imaging light transmitted by the LCD screen 13 to the lens 11. The centrifugal fan 20 is mainly used to provide power for the internal air circulation of the system. The first heat exchange radiator 31 and the second heat exchange radiator 32 are provided with heat dissipation fins. The main function of the heat exchange radiator 30 is to cool the hot air flowing through the closed air duct, and at the same time conduct the heat to the outside of the closed air duct for dissipation.

[0029] The air circulation flow in the entire optical machine body 10 is as follows Figure 2 As shown by the wind path arrow, the wind path starts from the fan outlet of the centrifugal fan 20, flows through the LCD screen 13 and the imaging Fresnel lens 12, takes away the high temperature of the LCD screen 13, and then flows along the internal circulation closed air duct to the inside of the heat exchange radiator 30. The heat exchange radiator 30 heats up the heat in the hot air, cools the hot air, and then flows to the cavity between the lighting Fresnel lens 15 and the insulation glass and polarizing film 14, as well as between the insulation glass and polarizing film 14 and the LCD screen 13 cavity, takes away the heat on the LCD screen 13, and the insulation glass and polarizing film 14 and the lighting Fresnel lens 15. After the high-temperature hot air flows out, it passes through the inside of the heat exchange radiator 30. The heat dissipation fins of the heat exchange radiator 30 absorb the heat in the hot air and cool it down before entering the air inlet side of the centrifugal fan 20, thus completing a cycle; that is, the cold air blown out from the fan outlet cools down the back of the LCD screen 13, then cools down through the heat exchange radiator 30, enters the cavity in front of the LCD screen 13, cools down the related optical components, and then enters the heat exchange radiator 30. After the hot air is cooled by the heat exchange radiator 30, it enters the fan inlet of the centrifugal fan 20; this structure has a longer heat exchange path and a higher heat exchange efficiency, and can better cool the LCD screen 13.

[0030] Figure 3 This is the state of the optical machine with the outer shell, mainly used to display the optical machine's external circulation system.

[0031] To introduce the air path direction of the optical machine external circulation system in more detail, Figure 4 As shown in the cross-sectional view, cold air from the outside of the whole machine enters the interior of the whole machine from the first air inlet 1821 and the air inlets on the left and right sides of the second air inlet 1822, then flows through the outside of the first heat exchange radiator 31 and the second heat exchange radiator 32, takes away the heat of the heat exchange radiator 30, and then passes through the LED cooling fan 40. At the same time, it takes away the heat of the LED radiator 50 and then flows through the first air inlet 1821 and the second air inlet 1822 to the outside of the whole machine casing 181; thus, a complete cooling system is formed by combining the internal circulation cooling system and the external circulation cooling system of the projector.

[0032] Compared to the prior art, the single-chip, fully enclosed LCD projection cooling system provided in this embodiment utilizes both an internal circulation cooling system and an external circulation cooling system. The internal circulation cooling system includes an internal circulation closed air duct disposed within the cavity of the optical engine body, a centrifugal fan located within the internal circulation closed air duct, and heat exchange radiators disposed on both sides of the optical engine body and connected to the internal circulation closed air duct. The external circulation cooling system includes an LED cooling fan and an LED radiator connected to the LED cooling fan. The LED cooling fan is disposed at the rear end of the optical engine body and is positioned opposite the outlet of the internal circulation closed air duct. The single-chip, fully enclosed LCD projection cooling system provided in this embodiment can significantly improve the cooling efficiency of the liquid crystal panel and optical components. Furthermore, the fully enclosed optical engine also facilitates dust removal and maintenance, significantly extending the life of the projector.

[0033] Although preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic inventive concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention. Clearly, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, to the extent such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to encompass such changes and modifications.

Claims

1. A single-chip fully enclosed LCD projection heat dissipation system, characterized in that: The invention comprises an internal circulation heat dissipation system arranged inside an optical machine body (10) and an external circulation heat dissipation system arranged outside the optical machine body (10), wherein the internal circulation heat dissipation system comprises an internal circulation closed air duct arranged inside a cavity of the optical machine body (10), a centrifugal fan (20) located in the internal circulation closed air duct, and a heat exchange radiator (30) arranged on both sides of the optical machine body (10) and connected to the internal circulation closed air duct; the external circulation heat dissipation system comprises an LED heat dissipation fan (40) and an LED heat sink (50) connected to the LED heat dissipation fan (40), wherein the LED heat dissipation fan (40) is arranged at the rear end of the optical machine body (10) and is arranged opposite to the outlet of the internal circulation closed air duct.

2. The single-chip fully enclosed LCD projection heat dissipation system according to claim 1, characterized in that: The optical machine body (10) includes a lens (11), an imaging Fresnel lens (12), an LCD screen (13), a heat-insulating glass and a polarizing film (14), an illumination Fresnel lens (15), a light cone (16), and a light source LED (17) arranged in sequence. The inner circulation closed air duct includes a first circulation closed air duct and a second circulation closed air duct connected to the first circulation closed air duct. The first circulation closed air duct is located between the imaging Fresnel lens (12) and the LCD screen (13), and the second circulation closed air duct is located between the LCD screen (13) and the illumination Fresnel lens (15). The heat-insulating glass and the polarizing film (14) are located in the middle of the second circulation closed air duct.

3. The single-chip fully enclosed LCD projection heat dissipation system according to claim 2, characterized in that: The optical machine body (10) comprises an entire machine housing (181), and an air inlet (182) and an air outlet (183) provided on the entire machine housing (181); the internal circulation closed air duct is provided in the entire machine housing (181); the inlet of the internal circulation closed air duct is connected to the air inlet (182); and the air outlet (183) is provided opposite to the LED radiator (50).

4. The single-chip fully enclosed LCD projection heat dissipation system according to claim 3, characterized in that: The heat exchange radiator (30) comprises a first heat exchange radiator (31) and a second heat exchange radiator (32), wherein the first heat exchange radiator (31) and the second heat exchange radiator (32) are respectively arranged on the left and right sides of the optical machine body (10).

5. The single-chip fully enclosed LCD projection heat dissipation system according to claim 3, characterized in that: The air inlet (182) comprises a first air inlet (1821) and a second air inlet (1822); the first heat exchange radiator (31) is arranged opposite to the first air inlet (1821); and the second heat exchange radiator (32) is arranged opposite to the second air inlet (1822).

6. The single-chip fully enclosed LCD projection heat dissipation system according to claim 4, characterized in that: The first heat exchange radiator (31) and the second heat exchange radiator (32) are respectively arranged on the left and right sides of the optical machine body (10) with the center line of the optical machine body (10) as an axis of symmetry.

7. The single-chip fully enclosed LCD projection heat dissipation system according to claim 6, wherein: Both the first heat exchange radiator (31) and the second heat exchange radiator (32) are provided with heat dissipation fins.

8. The single-chip fully enclosed LCD projection heat dissipation system according to claim 3, wherein: The LED cooling fan (40) includes a first LED cooling fan (41) and a second LED cooling fan (42); the LED radiator (50) includes a first LED radiator (51) and a second LED radiator (52); the first LED cooling fan (41) is connected to the first LED radiator (51); and the second LED cooling fan (42) is connected to the second LED radiator (52).

9. The single-chip fully enclosed LCD projection heat dissipation system according to claim 8, wherein: The air outlet (183) comprises a first air outlet (1831) and a second air outlet (1832); the first LED cooling fan (41) is arranged opposite to the first air outlet (1831); and the second LED cooling fan (42) is arranged opposite to the second air outlet (1832).

10. The single-chip fully enclosed LCD projection heat dissipation system according to claim 2, wherein: The LED heat sink (50) is connected to the optical machine body (10) via a heat-conducting pipe (60), and the LED heat sink (50) is arranged close to the light source LED (17).

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