Rapid heat dissipation closed ray machine and vertical projector

Abstract

The utility model relates to a closed light machine capable of rapidly dissipating heat and a vertical projector. The closed light machine comprises a shell, an internal circulation fan, an imaging assembly, a first heat exchange module and a second heat exchange module, the inner circulation fan is arranged in the shell, an inner circulation air channel communicated with an inlet and an air outlet of the inner circulation fan is formed in the shell, the imaging assembly comprises an LCD screen located in the inner circulation air channel, air in the inner circulation air channel flows through the two opposite sides of the LCD screen, and the direction of the air flowing through one side of the LCD screen is opposite to that of the air flowing through the other side of the LCD screen. According to the closed light machine, the LCD screen is subjected to heat dissipation in an internal circulation mode, the heat dissipation effect is good, the heat dissipation efficiency is high, the mute effect is good, the user experience can be improved, the internal circulation air channel is reasonable in design, miniaturization of the light machine is facilitated, in addition, the external circulation fan can conduct heat dissipation on the hot face radiator and the LED radiator at the same time, and the overall layout is compact.

Description

Technical Field

[0001] This utility model relates to the field of LCD projection technology, and in particular to a sealed optical engine with rapid heat dissipation and a vertical projector. Background Technology

[0002] The key component of an LCD projector is the optical engine, which typically includes an LCD screen, a light source, and a light funnel. The main imaging process involves light emitted from the light source being focused by the light funnel and then passing through the LCD screen to form the image. Because LCD screens have low light transmittance, they generate a significant amount of heat when the optical engine is operating.

[0003] To prevent dust contamination of the LCD screen, existing optical engines are generally designed as sealed systems. These sealed optical engines create an internal airflow channel, where air, driven by a fan, flows through a heat sink to cool the LCD screen. However, the design of this internal airflow channel is not ideal; the airflow direction is the same on both sides of the LCD screen. This results in the internal airflow channel occupying a significant amount of internal space, hindering the miniaturization of optical engines. Therefore, there is an urgent need to design a sealed optical engine with a more efficient airflow and cooling system. Utility Model Content

[0004] Based on this, the purpose of this utility model is to overcome the shortcomings of the prior art and provide a sealed optical engine with rapid heat dissipation and a vertical projector.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A rapidly heat-dissipating, hermetic optical engine, comprising:

[0007] Housing, internal circulation fan, imaging component, first heat exchange module, second heat exchange module;

[0008] The internal circulation fan is disposed within the housing, and an internal circulation duct is formed inside the housing, connecting the inlet and outlet of the internal circulation fan. The imaging component includes an LCD screen located within the internal circulation duct. Airflow from the internal circulation duct passes through opposite sides of the LCD screen, wherein the airflow on one side of the LCD screen flows in the opposite direction to the airflow on the other side. The first heat exchange module includes a first cold-side radiator and a first hot-side radiator connected to conduct heat. The second heat exchange module includes a second cold-side radiator and a second hot-side radiator connected to conduct heat. The first cold-side radiator and the second cold-side radiator are disposed within the internal circulation duct and are located at opposite ends of the LCD screen, respectively. The first hot-side radiator and the second hot-side radiator are disposed outside the housing.

[0009] The sealed optical engine in this application embodiment dissipates heat from the LCD screen through internal circulation, which has good heat dissipation effect, high heat dissipation efficiency, and good noise reduction effect. It can also prevent dust and dirt from entering the housing and contaminating the LCD screen, effectively eliminating the appearance of black spots on the LCD screen, which is conducive to improving the user experience. The internal circulation air duct design is reasonable and conducive to the miniaturization of the optical engine. In addition, the external circulation fan can simultaneously dissipate heat from the hot surface heat sink and the LED heat sink, which also makes the overall layout compact.

[0010] As one implementation, the system also includes a light source assembly, an LED heat sink, and an external circulation fan. The light source assembly includes an LED light source, which provides light to the LCD screen. The LED heat sink is disposed outside the housing and is used to dissipate heat from the LED light source. The LED heat sink includes a third cold-side heat sink and a third hot-side heat sink connected by heat pipes to conduct heat. The third cold-side heat sink is attached to the LED light source. The external circulation fan is disposed outside the housing and is used to drive the air outside the housing to dissipate heat from the first hot-side heat sink, the second hot-side heat sink, and the third hot-side heat sink.

[0011] In one embodiment, the third hot-surface radiator is disposed adjacent to the second hot-surface radiator, and the air inlet and outlet of the external circulation fan face the second hot-surface radiator and the third hot-surface radiator, respectively.

[0012] In one embodiment, the light source assembly further includes a mounting housing and a light funnel. The housing has a mounting opening near the LCD screen, and the mounting housing is installed in the mounting opening. The light funnel is disposed in the mounting housing, and the light outlet of the light funnel faces the LCD screen. The LED light source is disposed at the light inlet of the light funnel.

[0013] In one embodiment, the housing has a first cavity, a second cavity, and a third cavity arranged sequentially inside. The LCD screen is disposed in the second cavity and divided into a first heat dissipation channel and a second heat dissipation channel located on opposite sides of the LCD screen. The first heat dissipation channel, the first cavity, the second heat dissipation channel, and the third cavity are sequentially connected to form the internal circulation air duct. The first cold-side heat sink is disposed in the first cavity, and the internal circulation fan and the second cold-side heat sink are disposed in the third cavity.

[0014] In one embodiment, the first cold-side heat sink includes a plurality of spaced-apart first cold-end heat sinks, and the second cold-side heat sink includes a plurality of spaced-apart second cold-end heat sinks. The gaps between the plurality of first cold-end heat sinks and the gaps between the plurality of second cold-end heat sinks both face the internal circulation fan.

[0015] As one embodiment, it also includes an air guide shell, which is disposed outside the housing and surrounds the first hot surface radiator, the second hot surface radiator, the third hot surface radiator and the external circulation fan, so that the air in the air guide shell flows through the first hot surface radiator and the second hot surface radiator and then flows through the third hot surface radiator.

[0016] In one embodiment, the imaging assembly further includes a first Fresnel lens, a heat-insulating glass, and a second Fresnel lens. The first Fresnel lens, the heat-insulating glass, the LCD screen, and the second Fresnel lens are arranged sequentially along the light-emitting direction of the light funnel, and the first Fresnel lens covers the light-emitting port of the light funnel.

[0017] As one implementation, a projection component is also included. A projection cavity is formed inside the housing and located at the top of the second cavity. The projection component is disposed in the projection cavity and includes a reflector and a projection lens. Image light emitted from the imaging component is reflected by the reflector and then emitted from the projection lens.

[0018] This application discloses a vertical projector, which includes a projection housing and a sealed optical engine for rapid heat dissipation as described above, disposed within the projection housing.

[0019] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the closed optical engine from one perspective in an embodiment of this application;

[0021] Figure 2 This is a schematic diagram of the sealed optical engine from another perspective in an embodiment of this application.

[0022] Figure 3 This is a schematic diagram of the exploded structure of the sealed optical engine in the embodiments of this application;

[0023] Figure 4 This is a schematic diagram of the internal structure of the sealed optical engine in the embodiments of this application;

[0024] Figure 5 This is a schematic diagram of the airflow direction of the sealed optical engine in the embodiments of this application;

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Housing; 10. Internal circulation air duct; 101. First cavity; 102. First heat dissipation channel; 103. Second heat dissipation channel; 104. Third cavity; 11. Projection cavity; 2. Internal circulation fan; 31. First Fresnel lens; 32. Heat-insulating glass; 33. LCD screen; 34. Second Fresnel lens; 41. First cold-side heat sink; 411. First cold-end heat sink; 42. First hot-side heat sink; 43. Second cold-side heat sink; 431. Second cold-end heat sink; 44. Second hot-side heat sink; 51. Mounting shell; 52. Light funnel; 53. LED light source; 6. External circulation fan; 7. LED heat sink; 71. Third cold-side heat sink; 72. Third hot-side heat sink; 81. Reflector; 82. Projection lens; 9. Air guide shell. Detailed Implementation

[0027] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention.

[0028] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", 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 understood as a limitation on this utility model.

[0029] Please see Figures 1 to 5 This embodiment provides a rapidly heat-dissipating sealed optical engine. The sealed optical engine described in this embodiment is actually applied to a vertical projector; however, it can also be applied to other types of projectors with certain external adjustments. The sealed optical engine in this embodiment includes a housing 1, an internal circulation fan 2, an imaging component, a first heat exchange module, a second heat exchange module, a light source component, an external circulation fan 6, and an LED heat sink 7.

[0030] The internal circulation fan 2 is disposed inside the housing 1. An internal circulation duct 10 is formed inside the housing 1, which connects the air inlet and air outlet of the internal circulation fan 2. The imaging component includes an LCD screen 33 located in the internal circulation duct 10. The air in the internal circulation duct 10 flows through the opposite sides of the LCD screen 33. The air flowing through one side of the LCD screen 33 flows in the opposite direction to the air flowing through the other side of the LCD screen 33. That is, when the air circulates in the internal circulation duct 10, the air can flow through the opposite sides of the LCD screen 33 in sequence, and the air flowing through the opposite sides of the LCD screen 33 flows in opposite directions.

[0031] The first heat exchange module includes a first cold-side radiator 41 and a first hot-side radiator 42 connected to conduct heat. The second heat exchange module includes a second cold-side radiator 43 and a second hot-side radiator 44 connected to conduct heat. The first cold-side radiator 41 and the second cold-side radiator are disposed in the internal circulation duct 10, and the first cold-side radiator 41 and the second cold-side radiator are respectively located at opposite ends of the LCD screen 33. The first hot-side radiator 42 and the second hot-side radiator 44 are disposed outside the housing 1. With this arrangement, the air can be sufficiently cooled when circulating in the internal circulation duct 10. For example, the air flows through one side of the LCD screen 33, carrying away its heat, then passes through the first cold-side radiator 41 for cooling, then flows through the other side of the LCD screen 33 to carry away its heat again, and finally passes through the second cold-side radiator 43 for cooling.

[0032] The light source assembly includes a mounting housing 51, a light funnel 52, and an LED light source 53. The housing 1 has a mounting opening near the LCD screen 33, and the mounting housing 51 is installed in the mounting opening. The light funnel 52 is disposed in the mounting housing 51, and the light outlet of the light funnel 52 faces the LCD screen 33. The LED light source 53 is disposed at the light inlet of the light funnel 52. The LED light source 53 is used to provide light to the LCD screen 33. The light emitted by the LED light source 53 passes through the light funnel 52 and then through the imaging assembly to form image light. The LED heat sink 7 is disposed outside the housing 1 and is used to dissipate heat from the LED light source 53. The LED heat sink 7 includes a third cold-side heat sink 71 and a third hot-side heat sink 72 connected by heat pipes to conduct heat. The third cold-side heat sink 71 is fitted to the LED light source 53. The external circulation fan 6 is disposed outside the housing 1 and is used to drive the air outside the housing 1 to dissipate heat from the first hot-side heat sink 42, the second hot-side heat sink 44, and the third hot-side heat sink 72. The LED heat sink 7 effectively dissipates heat from the LED light source 53, ensuring its normal operation and extending its lifespan. The external circulation fan 6 can simultaneously cool the first hot-side heat sink 42, the second hot-side heat sink 44, and the third hot-side heat sink 72, which is beneficial for energy saving, reducing manufacturing costs, and reducing noise. Furthermore, the reasonable placement of the external circulation fan 6 ensures effective heat dissipation and makes the overall structure more compact.

[0033] like Figure 5As shown in the figure, the black arrows indicate the airflow direction of the internal circulation duct 10. With the above configuration, when the internal circulation fan 2 is started, it can drive the airflow of the internal circulation duct 10 to circulate. First, the air output from the outlet of the internal circulation fan 2 passes through one side of the LCD screen 33, carrying away the heat of the LCD screen 33 for the first heat dissipation. Then, the air flows to the first cold-side heat sink 41 for heat exchange and cooling. Next, the air passes through the other side of the LCD screen 33, carrying away the heat of the LCD screen 33 again for the second heat dissipation. Finally, it flows to the first cold-side heat sink 41 for heat exchange and cooling again, and then enters the inlet of the internal circulation fan 2 for continuous circulation. It can be seen that the design of the internal circulation duct 10 in this embodiment can effectively extend the length of the internal circulation duct 10, allowing air to pass through both sides of the LCD screen 33 from opposite directions, fully dissipating heat from the LCD screen 33, and saving internal space, which is beneficial to the miniaturization of the optical engine. By installing a first cold-side heat sink 41 and a second cold-side heat sink 43 within the internal circulation air duct 10, the temperature of the LCD screen 33 can be effectively controlled, ensuring heat dissipation. Furthermore, since the first cold-side heat sink 41 and the second cold-side heat sink 43 will heat up during heat exchange, a first hot-side heat sink 42 and a second hot-side heat sink 44 connected to the outside of the housing 1 are needed to conduct heat. The first hot-side heat sink 42 and the second hot-side heat sink 44 can quickly remove heat through the external circulation fan 6, keeping the first cold-side heat sink 41 and the second cold-side heat sink 43 at a low temperature. This effectively achieves rapid heat dissipation of the LCD screen 33, effectively ensuring the normal operation of the LCD screen 33 and the safety of the entire machine, and extending the service life of the LCD screen 33.

[0034] In this embodiment, the sealed optical engine dissipates heat from the LCD screen 33 through internal circulation, resulting in good heat dissipation, high heat dissipation efficiency, and good noise reduction. It also prevents dust and dirt from entering the housing 1 and contaminating the LCD screen 33, effectively eliminating the appearance of black spots on the LCD screen 33 and improving the user experience. The internal circulation duct 10 is reasonably designed, which is conducive to the miniaturization of the optical engine. In addition, the external circulation fan 6 can simultaneously dissipate heat from the hot surface heat sink and the LED heat sink 7, which also makes the overall layout compact.

[0035] Preferably, the third hot-surface radiator 72 is disposed adjacent to the second hot-surface radiator 44, and the air inlet and outlet of the external circulation fan 6 face the second hot-surface radiator 44 and the third hot-surface radiator 72, respectively. Thus, when the external circulation fan 6 is operating, it can draw air through the second hot-surface radiator 44 and the third hot-surface radiator 72, reducing wind resistance and making the airflow more stable.

[0036] Specifically, in this embodiment, the housing 1 has a first cavity 101, a second cavity, and a third cavity 104 arranged sequentially inside. The LCD screen 33 is disposed in the second cavity and divided into a first heat dissipation channel 102 and a second heat dissipation channel 103 located on opposite sides of the LCD screen 33. The first heat dissipation channel 102, the first cavity 101, the second heat dissipation channel 103, and the third cavity 104 are sequentially connected to form the internal circulation air duct 10. The first cold-side heat sink 41 is disposed in the first cavity 101, and the internal circulation fan 2 and the second cold-side heat sink 43 are disposed in the third cavity 104. With this arrangement, the internal layout of the housing 1 is reasonable, and airflow is convenient. The air blown out by the internal circulation fan 2 passes sequentially through the first heat dissipation channel 102, the first cavity 101, the second heat dissipation channel 103, and the third cavity 104 before returning to the air inlet of the internal circulation fan 2, thereby achieving cooling of the LCD screen 33.

[0037] Specifically, the imaging component described in this embodiment further includes a first Fresnel lens 31, a heat-insulating glass 32, and a second Fresnel lens 34. The first Fresnel lens 31, the heat-insulating glass 32, the LCD screen 33, and the second Fresnel lens 34 are arranged sequentially along the light-emitting direction of the light funnel 52, and the first Fresnel lens 31 covers the light-emitting port of the light funnel 52.

[0038] Specifically, the sealed optical engine in this embodiment also includes a projection component. A projection cavity 11 is formed inside the housing 1, located at the top of the second cavity. The projection component is disposed within the projection cavity 11 and includes a reflector 81 and a projection lens 82. Image light emitted from the imaging component is reflected by the reflector 81 and then emitted from the projection lens 82. Specifically, the second Fresnel lens 34 is sealed at the opening between the projection cavity 11 and the second cavity. Light emitted from the LED light source 53 passes sequentially through the light funnel 52, the first Fresnel lens 31, the heat-insulating glass 32, the LCD screen 33, the second Fresnel lens 34, and the reflector 81 before being emitted from the projection lens 82, forming a projected image.

[0039] Specifically, in this embodiment, the first cold-side radiator 41 includes a plurality of spaced-apart first cold-end heat sinks 411, and the second cold-side radiator 43 includes a plurality of spaced-apart second cold-end heat sinks 431. The gaps between the plurality of first cold-end heat sinks 411 and the gaps between the plurality of second cold-end heat sinks 431 all face the internal circulation fan 2. This arrangement can improve heat dissipation efficiency and is beneficial for cooling.

[0040] In this embodiment, the first cold-side heat sink 41 and the first hot-side heat sink 42 are connected by a heat pipe to conduct heat, facilitating the placement of the first hot-side heat sink 42 outside the housing 1. The second cold-side heat sink 43 and the second hot-side heat sink 44 are integrally formed, further facilitating heat dissipation.

[0041] Specifically, the rapidly heat-dissipating sealed optical engine in this embodiment also includes an air guide shell 9. The air guide shell 9 is disposed outside the housing 1, surrounding the first hot-surface heat sink 42, the second hot-surface heat sink 44, the third hot-surface heat sink 72, and the external circulation fan 6, so that the air inside the air guide shell 9 flows through the first hot-surface heat sink 42 and the second hot-surface heat sink 44 before flowing through the third hot-surface heat sink 72. By setting the air guide shell 9, the airflow direction outside the housing 1 can be effectively controlled, avoiding the waste of air volume, making the overall airflow direction more orderly, and the heat dissipation effect better.

[0042] Preferably, the internal circulation fan 2 described in this embodiment is a vortex fan, which facilitates the design of the internal circulation duct 10.

[0043] This embodiment also provides a vertical projector, which includes a projection housing and a sealed optical engine for rapid heat dissipation as described in this embodiment, disposed within the projection housing. This LCD projector has the advantages of the sealed optical engine of this embodiment, which will not be elaborated here.

[0044] The embodiments described above are merely examples 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 the utility model. 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 modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A sealed optical engine with rapid heat dissipation, characterized in that, include: Housing, internal circulation fan, imaging component, first heat exchange module, second heat exchange module; The internal circulation fan is disposed within the housing, and an internal circulation duct is formed inside the housing, connecting the inlet and outlet of the internal circulation fan. The imaging component includes an LCD screen located within the internal circulation duct. Airflow from the internal circulation duct passes through opposite sides of the LCD screen, wherein the airflow on one side of the LCD screen flows in the opposite direction to the airflow on the other side. The first heat exchange module includes a first cold-side radiator and a first hot-side radiator connected to conduct heat. The second heat exchange module includes a second cold-side radiator and a second hot-side radiator connected to conduct heat. The first cold-side radiator and the second cold-side radiator are disposed within the internal circulation duct and are located at opposite ends of the LCD screen, respectively. The first hot-side radiator and the second hot-side radiator are disposed outside the housing.

2. The rapidly heat-dissipating sealed optical engine according to claim 1, characterized in that: It also includes a light source assembly, an LED heat sink, and an external circulation fan. The light source assembly includes an LED light source, which is used to provide light to the LCD screen. The LED heat sink is disposed outside the housing and is used to dissipate heat from the LED light source. The LED heat sink includes a third cold surface heat sink and a third hot surface heat sink connected by heat pipes to conduct heat. The third cold surface heat sink is attached to the LED light source. The external circulation fan is disposed outside the housing and is used to drive the air outside the housing to dissipate heat from the first hot surface heat sink, the second hot surface heat sink, and the third hot surface heat sink.

3. The rapidly heat-dissipating sealed optical engine according to claim 2, characterized in that: The third hot-surface radiator is disposed adjacent to the second hot-surface radiator, and the air inlet and outlet of the external circulation fan face the second hot-surface radiator and the third hot-surface radiator, respectively.

4. The rapidly heat-dissipating sealed optical engine according to claim 3, characterized in that: The light source assembly also includes a mounting shell and a light funnel. The shell has a mounting opening near the LCD screen, and the mounting shell is installed in the mounting opening. The light funnel is disposed in the mounting shell, and the light outlet of the light funnel faces the LCD screen. The LED light source is disposed at the light inlet of the light funnel.

5. The rapidly heat-dissipating sealed optical engine according to claim 1, characterized in that: The housing contains a first cavity, a second cavity, and a third cavity arranged sequentially. The LCD screen is disposed in the second cavity and divided into a first heat dissipation channel and a second heat dissipation channel located on opposite sides of the LCD screen. The first heat dissipation channel, the first cavity, the second heat dissipation channel, and the third cavity are sequentially connected to form the internal circulation air duct. The first cold-side heat sink is disposed in the first cavity, and the internal circulation fan and the second cold-side heat sink are disposed in the third cavity.

6. The rapidly heat-dissipating hermetic optical engine according to claim 1, characterized in that: The first cold-side heat sink includes a plurality of spaced-apart first cold-end heat sinks, and the second cold-side heat sink includes a plurality of spaced-apart second cold-end heat sinks. The gaps between the plurality of first cold-end heat sinks and the gaps between the plurality of second cold-end heat sinks are both directed toward the internal circulation fan.

7. The rapidly heat-dissipating sealed optical engine according to claim 3, characterized in that: It also includes an air guide shell, which is disposed outside the housing and surrounds the first hot surface radiator, the second hot surface radiator, the third hot surface radiator and the external circulation fan, so that the air in the air guide shell flows through the first hot surface radiator and the second hot surface radiator and then flows through the third hot surface radiator.

8. The rapidly heat-dissipating hermetic optical engine according to claim 4, characterized in that: The imaging assembly further includes a first Fresnel lens, a heat-insulating glass, and a second Fresnel lens. The first Fresnel lens, the heat-insulating glass, the LCD screen, and the second Fresnel lens are arranged sequentially along the light-emitting direction of the light funnel, and the first Fresnel lens covers the light-emitting port of the light funnel.

9. The rapidly heat-dissipating hermetic optical engine according to claim 5, characterized in that... It also includes a projection component, and a projection cavity is formed inside the housing located at the top of the second cavity. The projection component is disposed in the projection cavity and includes a reflector and a projection lens. Image light emitted from the imaging component is reflected by the reflector and then emitted from the projection lens.

10. A vertical projector, characterized in that, It includes a projection housing and a sealed optical engine for rapid heat dissipation as described in any one of claims 1-9, disposed within the projection housing.

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