Closed ray machine for vertical projector and LCD projector
By designing an inner circulation air duct in a closed optical machine to allow air to flow oppositely on both sides of the LCD screen, and combining cold and hot surface radiators and external circulation fans, the problems of large space occupied by the inner circulation air duct and low heat dissipation efficiency are solved, and efficient heat dissipation, dust prevention and optical machine are miniaturized, improving the user experience.
Patent Information
- Application Number
- CN202422739744.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-11
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-11-11
AI Technical Summary
The design of the internal circulation air duct of the existing closed optical machine is unreasonable, which leads to occupying more space inside the optical machine, which is not conducive to miniaturization and insufficient heat dissipation efficiency.
The internal circulation air duct design is adopted to make air flow opposite to each other on both sides of the LCD screen. Combined with cold and hot surface radiators and external circulation fans, it can achieve efficient heat dissipation, and heat dissipation of LED light sources and thermal surface radiators through internal and external circulation fans.
It improves the heat dissipation effect and efficiency, prevents dust pollution, extends the service life of the LCD screen, promotes the miniaturization of the optical machine, reduces noise, and improves the user experience.
Smart Images
Figure CN223296265U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of projectors, in particular to a sealed optical machine for a vertical projector and an LCD projector. Background Art
[0002] The key components of an LCD projector are the optical engine, which generally includes the LCD screen, light source, and light funnel. The main imaging process is that light from the light source is concentrated by the light funnel and then passes through the LCD screen, forming the image light. Because LCD screens have low light transmittance, the optical engine generates a lot of heat when it is in operation.
[0003] To prevent dust from contaminating LCD screens, existing optical engines are typically enclosed. These enclosed optical engines feature an internal circulation duct. Driven by a fan, air in this duct flows through a heat sink, cooling the LCD screen. However, the design of these internal circulation ducts is inefficient. Air flows in the same direction on both sides of the LCD screen, which causes the duct to occupy a significant amount of space within the optical engine, hindering the development of optical engine miniaturization. Therefore, a sealed optical engine with a rational airflow and efficient heat dissipation is urgently needed. Utility Model Content
[0004] Based on this, the purpose of the present invention is to overcome the deficiencies of the prior art and provide a sealed optical engine for a vertical projector and an LCD projector.
[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0006] A sealed optical engine for a vertical projector, comprising:
[0007] Housing, internal circulation fan, imaging component, heat exchange module, light source component, external circulation fan and LED radiator;
[0008] The internal circulation fan is disposed within the housing, and an internal circulation duct connected to an air inlet and an air outlet of the internal circulation fan is formed within the housing. The imaging assembly includes an LCD screen located within the internal circulation duct, and air in the internal circulation duct flows through opposite sides of the LCD screen, wherein the air flowing through one side of the LCD screen is in an opposite direction to the air flowing through the other side of the LCD screen. The heat exchange module includes a cold surface radiator and a hot surface radiator connected to conduct heat, the cold surface radiator being disposed within the internal circulation duct, and the hot surface radiator being disposed outside the housing.
[0009] The light source assembly includes a mounting shell, a light funnel and an LED light source. The shell is provided with a mounting opening at a position adjacent to the LCD screen. The mounting shell is installed in the mounting opening. The light funnel is provided in the mounting shell, and the light outlet of the light funnel faces the LCD screen. The LED light source is provided at the entrance light of the light funnel. The LED radiator is provided outside the shell for dissipating heat from the LED light source. The external circulation fan is provided outside the shell and is located on the side of the LED radiator away from the hot surface radiator.
[0010] The enclosed optical machine in the embodiment of the present application dissipates heat from the LCD screen through an internal circulation method, which has good heat dissipation effect, high heat dissipation efficiency, and good silent effect. It can also prevent dust and dirt from entering the shell and contaminating the LCD screen, effectively eliminating the appearance of black spots on the LCD screen, which is beneficial to improving user experience. The internal circulation air duct is reasonably designed, which is beneficial to the miniaturization of the optical machine. In addition, the external circulation fan can dissipate heat to the hot surface radiator and the LED radiator at the same time, which also makes the overall layout compact.
[0011] As an embodiment, the air inlet of the external circulation fan is directly opposite to the LED radiator.
[0012] As an embodiment, a first cavity, a second cavity and a third cavity arranged in sequence are formed inside the shell, the LCD screen is arranged in the second cavity and is 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 connected in sequence to form the internal circulation air duct, the internal circulation fan is arranged in the third cavity, and the cold surface radiator is arranged in the first cavity.
[0013] As an embodiment, the cold surface radiator includes a plurality of first heat sinks arranged at intervals, and the gaps between the plurality of first heat sinks face the internal circulation fan.
[0014] As an embodiment, the LED radiator includes a heat conduction plate, a heat pipe and a plurality of spaced-apart heat dissipation fins. The heat conduction plate is attached to the side of the LED light source facing away from the light funnel. One end of the heat pipe is connected to the heat conduction plate, and the other end passes through the plurality of heat dissipation fins. The gaps between the plurality of heat dissipation fins face the external circulation fan.
[0015] As an embodiment, the imaging assembly further includes a first filter, insulating glass and a second filter. The first filter, insulating glass, LCD screen and second filter are arranged in sequence along the light emitting direction of the light funnel, and the first filter cover is arranged at the light outlet of the light funnel.
[0016] As an embodiment, the sealed optical machine also includes a projection component, and a projection cavity located at the top of the second cavity is formed inside the shell. The projection component is arranged in the projection cavity, and includes a reflector and a projection lens. The image light emitted from the imaging component is reflected by the reflector and then emitted from the projection lens.
[0017] As an embodiment, the cold surface radiator and the hot surface radiator are integrated.
[0018] As an embodiment, the internal circulation fan is a vortex fan.
[0019] An LCD projector comprises a projection housing and the sealed optical engine for a vertical projector arranged in the projection housing.
[0020] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 This is a schematic structural diagram of a sealed optical engine from one perspective in an embodiment of the present application;
[0022] Figure 2 This is a structural diagram of the sealed optical engine from another perspective in an embodiment of the present application;
[0023] Figure 3 This is a schematic diagram of the exploded structure of the sealed optical engine in the embodiment of the present application;
[0024] Figure 4 This is a schematic diagram of the internal structure of a sealed optical engine in an embodiment of the present application;
[0025] Figure 5 Schematic diagram of the air flow of the enclosed optical engine in the embodiment of the present application;
[0026] Figure 6 This is a schematic structural diagram of a heat exchange module in an embodiment of the present application;
[0027] Description of reference numerals:
[0028] 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 mirror; 32. Insulating glass; 33. LCD screen; 34. Second mirror; 41. Cold surface radiator; 411. First heat sink; 42. Hot surface radiator; 421. Second heat sink; 51. Mounting shell; 52. Light funnel; 53. LED light source; 6. External circulation fan; 7. LED radiator; 71. Heat conduction plate; 72. Heat pipe; 73. Heat dissipation fins; 81. Reflector; 82. Projection lens. DETAILED DESCRIPTION
[0029] To further illustrate various embodiments, this utility model is provided with accompanying drawings. These drawings form part of the disclosure of this utility model and are primarily used to illustrate the embodiments and, in conjunction with the relevant description in the specification, to explain the operating principles of the embodiments. By referring to these drawings, those skilled in the art will be able to understand other possible implementations and the advantages of this utility model.
[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "left", "right", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and 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 orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention.
[0031] See also Figures 1 to 6 This embodiment provides a sealed optical engine. This sealed optical engine is practically applied to a stand-mounted projector. Of course, it can also be applied to projectors of other placement types through certain external adjustments. This sealed optical engine includes a housing 1, an internal circulation fan 2, an imaging assembly, a heat exchange module, a light source assembly, an external circulation fan 6, and an LED heat sink 7.
[0032] The internal circulation fan 2 is arranged in the shell 1, and an internal circulation air duct 10 connected to the air inlet and air outlet of the internal circulation fan 2 is formed inside the shell 1. The imaging component includes an LCD screen 33 located in the internal circulation air duct 10. The air of the internal circulation air duct 10 flows through the opposite sides of the LCD screen 33, wherein the direction of the air flowing through one side of the LCD screen 33 is opposite to the direction of the air flowing through the other side of the LCD screen 33. That is, when the air circulates in the internal circulation air duct 10, the air can flow through the opposite sides of the LCD screen 33 in turn, and the air flowing through the opposite sides of the LCD screen 33 flows in opposite directions.
[0033] The heat exchange module includes a cold surface radiator 41 and a hot surface radiator 42 connected to conduct heat. The cold surface radiator 41 is disposed in the internal circulation air duct 10, and the hot surface radiator 42 is disposed outside the housing 1. The light source assembly includes a mounting shell 51, a light funnel 52, and an LED light source 53. The housing 1 is provided with a mounting opening adjacent to the LCD screen 33. The mounting shell 51 is mounted in the mounting opening. The light funnel 52 is disposed in the mounting shell 51, with the light outlet of the light funnel 52 facing the LCD screen 33. The LED light source 53 is disposed at the entrance of the light funnel 52. Light emitted by the LED light source 53 passes through the light funnel 52 and then through the imaging assembly, thereby forming image light.
[0034] The LED radiator 7 is disposed outside the housing 1 for dissipating heat from the LED light source 53 . The external circulation fan 6 is disposed outside the housing 1 and is located on a side of the LED radiator 7 away from the hot surface radiator 42 .
[0035] The LED heat sink 7 can dissipate heat from the LED light source 53, effectively ensuring the normal operation of the LED light source 53 and extending the service life of the LED light source 53. The external circulation fan 6 can cool the LED heat sink 7 and the hot surface radiator 42 simultaneously, which is beneficial for energy conservation and consumption reduction, reducing manufacturing costs and noise. In addition, the location of the external circulation fan 6 is reasonable, which can ensure the heat dissipation effect and make the overall structure more compact.
[0036] like Figure 5 As shown, Figure 5 The black arrow in the middle indicates the direction of air flow in the internal circulation duct 10. With the above arrangement, when the internal circulation fan 2 is started, the air in the internal circulation duct 10 can be driven to circulate. First, the air output from the outlet of the internal circulation fan 2 passes through one side of the LCD screen 33, taking away the heat from the LCD screen 33 for the first heat dissipation. The air then flows to the cold surface radiator 41 for heat exchange and cooling. The air then passes through the other side of the LCD screen 33, again taking away the heat from the LCD screen 33 for the second heat dissipation. Finally, the air enters the air inlet of the internal circulation fan 2 and circulates in sequence. 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 the heat of the LCD screen 33, and saving internal space, thereby facilitating the miniaturization of the optical machine.
[0037] In addition, since the cold surface radiator 41 will heat up during heat exchange, it is necessary to connect the hot surface radiator 42 outside the shell 1 to absorb the heat of the cold surface radiator 41. The hot surface radiator 42 can quickly take away the heat through the external circulation fan 6, so that the cold surface radiator 41 is in a low temperature state, effectively realizing the 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.
[0038] The enclosed optical machine in the embodiment of the present application dissipates heat from the LCD screen 33 through internal circulation, which has good heat dissipation effect, high heat dissipation efficiency, and good quiet effect. It can also prevent dust and dirt from entering the shell 1 to contaminate the LCD screen 33, effectively eliminating the appearance of black spots on the LCD screen 33, which is beneficial to improving user experience. The internal circulation air duct 10 is reasonably designed, which is beneficial to the miniaturization of the optical machine. In addition, the external circulation fan 6 can dissipate heat to the hot surface radiator 42 and the LED radiator 7 at the same time, which also makes the overall layout compact.
[0039] The air inlet of the external circulation fan 6 is directly opposite to the LED radiator 7 , so that the external circulation fan 6 can draw air to flow through the hot surface radiator 42 and the LED radiator 7 when it is working, thereby reducing wind resistance and making the air flow more stable.
[0040] Specifically, in this embodiment, the interior of the housing 1 is formed with a first cavity 101, a second cavity, and a third cavity 104, which are arranged in sequence. The LCD screen 33 is disposed in the second cavity, which is 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 internal circulation fan 2 is disposed in the third cavity 104, and the cold surface radiator 41 is disposed in the first cavity 101. This arrangement ensures a reasonable layout within the housing 1 and facilitates air flow. The air blown by the internal circulation fan 2 passes through the first heat dissipation channel 102, the first cavity 101, the second heat dissipation channel 103, and the third cavity 104 in sequence before returning to the air inlet of the internal circulation fan 2, thereby cooling the LCD screen 33.
[0041] Specifically, the imaging assembly described in this embodiment also includes a first filter 31, an insulating glass 32 and a second filter 34. The first filter 31, the insulating glass 32, the LCD screen 33 and the second filter 34 are arranged in sequence along the light output direction of the light funnel 52, and the first filter 31 is covered on the light output port of the light funnel 52.
[0042] Specifically, the sealed optical machine of this embodiment also includes a projection assembly. A projection cavity 11 is formed within the housing 1 and is located at the top of the second cavity. The projection assembly is disposed within the projection cavity 11 and includes a reflector 81 and a projection lens 82. Image light emitted from the imaging assembly is reflected by the reflector 81 and then emitted from the projection lens 82. Specifically, the second mirror 34 is sealed at the opening between the projection cavity 11 and the second cavity. Light emitted by the LED light source 53 passes through the light funnel 52, the first mirror 31, the insulating glass 32, the LCD screen 33, the second mirror 34, and the reflector 81 in sequence before being emitted from the projection lens 82 to form a projected image.
[0043] Specifically, the cold surface radiator 41 of this embodiment includes a plurality of first fins 411 spaced apart from each other. The gaps between the first fins 411 face the internal circulation fan 2. This arrangement improves heat dissipation efficiency and facilitates cooling. The hot surface radiator 42 includes a plurality of second fins 421 spaced apart from each other. The cold surface radiator 41 and the hot surface radiator 42 are integrally arranged, further facilitating heat dissipation.
[0044] Specifically, the LED radiator 7 described in this embodiment includes a heat conducting plate 71, a heat pipe 72 and a plurality of heat dissipating fins 73 arranged at intervals. The heat conducting plate 71 is arranged on the side of the LED light source 53 facing away from the light funnel 52. One end of the heat pipe 72 is connected to the heat conducting plate 71, and the other end passes through the plurality of heat dissipating fins 73. The gaps between the plurality of heat dissipating fins 73 face the external circulation fan 6, thereby efficiently dissipating the heat of the LED light source 53.
[0045] Preferably, the internal circulation fan 2 in this embodiment is a vortex fan, and the use of such a fan can facilitate the design of the internal circulation air duct 10.
[0046] This embodiment further provides an LCD projector, which includes a projection housing and a sealed optical engine as described in this embodiment disposed in the projection housing. The LCD projector has the advantages of the sealed optical engine of this embodiment, which will not be described in detail here.
[0047] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, and all such variations and improvements fall within the scope of protection of the present invention.
Claims
1. A sealed optical engine for a vertical projector, characterized in that: include: Housing, internal circulation fan, imaging component, heat exchange module, light source component, external circulation fan and LED radiator; The internal circulation fan is disposed within the housing, and an internal circulation duct connected to an air inlet and an air outlet of the internal circulation fan is formed within the housing. The imaging assembly includes an LCD screen located within the internal circulation duct, and air in the internal circulation duct flows through opposite sides of the LCD screen, wherein the air flowing through one side of the LCD screen is in an opposite direction to the air flowing through the other side of the LCD screen. The heat exchange module includes a cold surface radiator and a hot surface radiator connected to conduct heat, the cold surface radiator being disposed within the internal circulation duct, and the hot surface radiator being disposed outside the housing. The light source assembly includes a mounting shell, a light funnel and an LED light source. The shell is provided with a mounting opening at a position adjacent to the LCD screen. The mounting shell is installed in the mounting opening. The light funnel is provided in the mounting shell, and the light outlet of the light funnel faces the LCD screen. The LED light source is provided at the entrance light of the light funnel. The LED radiator is provided outside the shell for dissipating heat from the LED light source. The external circulation fan is provided outside the shell and is located on the side of the LED radiator away from the hot surface radiator.
2. The sealed optical engine for a stand-type projector according to claim 1, characterized in that: The air inlet of the external circulation fan is directly opposite to the LED radiator.
3. The sealed optical engine for a stand-type projector according to claim 2, characterized in that: A first cavity, a second cavity, and a third cavity are formed inside the shell, which are arranged in sequence. The LCD screen is arranged in the second cavity and is 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 connected in sequence to form the internal circulation air duct. The internal circulation fan is arranged in the third cavity, and the cold surface radiator is arranged in the first cavity.
4. The sealed optical engine for a stand-type projector according to claim 1, characterized in that: The cold surface radiator includes a plurality of first radiating fins arranged at intervals, and the gaps between the plurality of first radiating fins face the internal circulation fan.
5. The sealed optical engine for a stand-type projector according to claim 1, characterized in that: The LED radiator includes a heat conducting plate, a heat pipe and a plurality of heat dissipating fins arranged at intervals. The heat conducting plate is attached to the side of the LED light source facing away from the light funnel. One end of the heat pipe is connected to the heat conducting plate, and the other end passes through the plurality of heat dissipating fins. The gaps between the plurality of heat dissipating fins face the external circulation fan.
6. The sealed optical engine for a stand-type projector according to claim 1, characterized in that: The imaging assembly also includes a first Fibonacci mirror, insulating glass, and a second Fibonacci mirror. The first Fibonacci mirror, insulating glass, LCD screen, and second Fibonacci mirror are arranged in sequence along the light emitting direction of the light funnel, and the first Fibonacci mirror cover is arranged on the light emitting port of the light funnel.
7. The sealed optical engine for a stand-type projector according to claim 3, characterized in that: It also includes a projection component. A projection cavity located at the top of the second cavity is formed inside the shell. The projection component is arranged in the projection cavity and includes a reflector and a projection lens. The image light emitted from the imaging component is reflected by the reflector and then emitted from the projection lens.
8. The sealed optical engine for a stand-type projector according to claim 1, characterized in that: The cold surface radiator and the hot surface radiator are arranged integrally.
9. The sealed optical engine for a stand-type projector according to any one of claims 1 to 8, characterized in that: The internal circulation fan is a vortex fan.
10. An LCD projector, characterized in that: The invention comprises a projection housing and a sealed optical engine for a vertical projector as claimed in any one of claims 1 to 9 which is arranged in the projection housing.