Closed ray machine with 3D uniform temperature plate and LCD projector

Abstract

The utility model relates to a closed optical machine with a 3D uniform temperature plate. The closed optical machine comprises a housing, an optical device, an internal circulation fan, a heat radiation module and a heat radiation fan. An internal circulation air duct is formed in the shell, the optical device and the internal circulation fan are both arranged in the internal circulation air duct, the optical device comprises an LCD screen, the heat dissipation module comprises a 3D uniform temperature plate, first heat dissipation fins and second heat dissipation fins, the 3D uniform temperature plate comprises a uniform temperature plate body, a first heat pipe and a second heat pipe, and the first heat pipe and the second heat pipe are connected to the two opposite sides of the uniform temperature plate body. The interiors of the first heat pipe and the second heat pipe are communicated with the uniform temperature plate body, the first heat pipe is sleeved with the first heat dissipation fins which are located in the inner circulation air channel, and the second heat pipe is sleeved with the second heat dissipation fins which are located outside the shell. The structure of the 3D uniform-temperature plate is improved, the 3D uniform-temperature plate comprises the uniform-temperature plate body, the first heat pipe and the second heat pipe, the first heat pipe and the second heat pipe are connected to the two sides of the uniform-temperature plate body, and the first heat pipe and the second heat pipe are both sleeved with the heat dissipation fins, so that a super-efficient heat dissipation module can be formed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of LCD projector, especially a closed light machine with 3D uniform temperature plate and LCD projector. BACKGROUND

[0002] The closed light machine can effectively prevent dust and pollutants from entering the light path, thereby significantly reducing the influence of dust on the panel, enabling the projection device to be more widely applicable to various use occasions, and also greatly prolonging the service life of the projection device.

[0003] However, the closed environment brings great difficulty to the heat dissipation of the optical elements inside the light machine. Among them, the LCD screen and the polarizer and other optical devices are the key heat dissipation components of the light machine, but due to their particularity, they can only be cooled by heat convection, so the current heat dissipation method of the closed light machine can only pass heat to the heat sink through the internal circulation flow field, then conduct to the outside through the heat sink, and finally take away the heat by the external flow field, so the heat transfer efficiency of the internal circulation heat sink is the key to the heat dissipation of the closed light machine.

[0004] The traditional internal circulation heat sink is formed by connecting the hot end fins and the cold end fins into a whole heat sink, and the heat exchange efficiency of such a heat sink is not high enough to meet the heat dissipation needs of high-power light machines. Phase change heat transfer is considered to be the most efficient heat exchange method, and the 3D uniform temperature plate developed on this basis is an advanced heat dissipation technology. It combines the planar heat conduction ability of the traditional two-dimensional uniform temperature plate and the linear heat conduction ability of the heat pipe, and can realize ultra-high efficient heat conduction and diffusion through the three-dimensional structure and the heat dissipation fins. However, the existing 3D uniform temperature plate mainly conducts and absorbs heat by directly contacting the heat dissipation fins on one side and develops heat through air on the other side, that is, only one side is embedded with a heat pipe, and the internal circulation heat sink of the closed light machine needs to complete heat absorption and dissipation through forced convection, so the existing 3D uniform temperature plate cannot fully exert its advantages. SUMMARY

[0005] Therefore, the utility model discloses a closed light machine with 3D uniform temperature plate and LCD projector, which can overcome the defects of the prior art.

[0006] In order to achieve the above purpose, the utility model adopts the technical scheme that:

[0007] A closed light machine with 3D uniform temperature plate comprises:

[0008] A shell, optical devices, an internal circulation fan, a heat dissipation module and a heat dissipation fan;

[0009] The shell is internally formed with an internal circulation air duct, the optical device and the internal circulation fan are arranged in the internal circulation air duct, the optical device comprises an LCD screen, the heat dissipation module comprises a 3D heat equalizing plate, a first heat dissipation fin and a second heat dissipation fin, the 3D heat equalizing plate comprises a heat equalizing plate body and a first heat pipe and a second heat pipe connected to opposite sides of the heat equalizing plate body, the first heat pipe and the second heat pipe are in communication with the heat equalizing plate body, the first heat dissipation fin is sleeved on the first heat pipe and located in the internal circulation air duct, the second heat dissipation fin is sleeved on the second heat pipe and located outside the shell, and the heat dissipation fan is arranged outside the shell to cool the second heat dissipation fin.

[0010] According to the technical scheme, the closed optical machine has a newly designed 3D heat equalizing plate, compared with the prior art, the 3D heat equalizing plate is improved in structure, which comprises a heat equalizing plate body and a first heat pipe and a second heat pipe connected to opposite sides of the heat equalizing plate body, the first heat pipe and the second heat pipe are sleeved with heat dissipation fins to form a super-efficient heat dissipation module, the LCD screen can be cooled by internal circulation, the heat dissipation effect is good, the heat dissipation efficiency is high, the noise reduction effect is good, and the dust and dirt can be prevented from entering the shell to pollute the LCD screen, effectively preventing the occurrence of LCD screen black spots, and improving the user experience.

[0011] As an implementation form, the shell is internally formed with a first cavity and a second cavity arranged in an up-down manner, the shell is further provided with a first vent and a second vent for connecting the first cavity and the second cavity, the first cavity, the first vent, the second cavity and the second vent jointly enclose the internal circulation air duct, the LCD screen is located in the first cavity, and the internal circulation fan and the first heat dissipation fin are located in the second cavity.

[0012] As an implementation form, the air inlet of the internal circulation fan is arranged opposite to the second vent, and the air outlet of the internal circulation fan is arranged opposite to the first heat dissipation fin.

[0013] As an implementation form, the shell comprises an upper shell, a middle shell and a lower shell arranged in sequence from top to bottom, the upper shell is a plate structure, the middle shell and the lower shell are both pot-shaped structures with openings facing upward, the upper shell covers the opening of the middle shell to enclose the first cavity, the opening of the lower shell is connected with the bottom of the middle shell to enclose the second cavity, and the first vent and the second vent are both arranged at the bottom of the middle shell.

[0014] As an implementation form, the optical device further comprises a first Fresnel lens, heat insulation glass, a second Fresnel lens and a reflector, the first Fresnel lens, the heat insulation glass, the LCD screen, the second Fresnel lens and the reflector are arranged in sequence along the direction from the first vent to the second vent.

[0015] As an implementation form, the LCD screen is arranged opposite to the first air vent.

[0016] As an implementation form, the vapor chamber body comprises an upper plate and a lower plate, the upper plate and the lower plate are connected at edges to enclose a first cavity, inner surfaces of the upper plate and the lower plate are provided with a first capillary structure, the upper plate and the lower plate are both provided with a plurality of mounting openings, the mounting openings of the upper plate are arranged to mount the first heat pipe, the mounting openings of the lower plate are arranged to mount the second heat pipe, the first heat pipe and the second heat pipe are both arranged to form a second cavity in the inside, the second cavity is communicated with the first cavity, inner walls of the first heat pipe and the second heat pipe are both provided with a second capillary structure, the second capillary structure is connected with the first capillary structure.

[0017] As an implementation form, the inner circulation fan and the heat dissipation fan are both vortex fans.

[0018] As an implementation form, the first cavity is provided with a support column, the support column supports the upper plate and the lower plate.

[0019] The LCD projector of the present application comprises a projection shell and a sealed light engine with a 3D vapor chamber arranged in the projection shell.

[0020] In order to better understand and implement, the present application is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 Fig. 1 is a structural schematic diagram of a sealed light engine in an embodiment of the present application;

[0022] Figure 2 Fig. 2 is an exploded schematic diagram of a sealed light engine in an embodiment of the present application;

[0023] Figure 3 Fig. 3 is a sectional structural schematic diagram of a sealed light engine in an embodiment of the present application;

[0024] Figure 4 Fig. 4 is a structural schematic diagram of a heat dissipation module in an embodiment of the present application;

[0025] Figure 5 Fig. 5 is a partial sectional structural schematic diagram of a 3D vapor chamber in an embodiment of the present application;

[0026] BRIEF DESCRIPTION OF DRAWINGS

[0027] 1, shell; 10, inner circulating air duct; 101, first cavity; 102, second cavity; 103, first vent; 104, second vent; 11, upper shell; 12, middle shell; 13, lower shell; 21, first prism; 22, heat insulation glass; 23, LCD screen; 24, second prism; 25, reflector; 3, inner circulating fan; 4, heat dissipation module; 41, 3D uniform temperature plate; 411, uniform temperature plate body; 4111, upper plate; 4112, lower plate; 401, first chamber; 402, mounting port; 403, support column; 412, first heat pipe; 413, second heat pipe; 42, first heat dissipation fin; 43, second heat dissipation fin; 5, heat dissipation fan. DETAILED DESCRIPTION

[0028] To further illustrate the embodiments, the utility model provides drawings. These drawings are part of the utility model disclosure, which is mainly used to illustrate the embodiments, and can explain the operation principle of the embodiments in cooperation with the related description of the specification. With reference to these contents, those skilled in the art should understand other possible embodiments and the advantages of the utility model.

[0029] In the description of the utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the utility model.

[0030] Please refer to Figures 1 to 5 The embodiment provides a sealed optical machine with 3D uniform temperature plate 41, which comprises:

[0031] Shell 1, optical device, inner circulating fan 3, heat dissipation module 4 and heat dissipation fan 5.

[0032] The shell 1 is internally formed with an internal circulation air duct 10, the optical device and the internal circulation fan 3 are arranged in the internal circulation air duct 10, the optical device comprises an LCD screen 23, the heat dissipation module 4 comprises a 3D heat uniform plate 41, a first heat dissipation fin 42 and a second heat dissipation fin 43, the 3D heat uniform plate 41 comprises a heat uniform plate body 411 and a first heat pipe 412 and a second heat pipe 413 connected to opposite sides of the heat uniform plate body 411, the inside of the first heat pipe 412 and the second heat pipe 413 communicates with the heat uniform plate body 411, the first heat dissipation fin 42 is sleeved on the first heat pipe 412 and located in the internal circulation air duct 10, and the second heat dissipation fin 43 is sleeved on the second heat pipe 413 and located outside the shell 1. The heat dissipation fan 5 is arranged outside the shell 1 and used for cooling the second heat dissipation fin 43.

[0033] It can be understood that the heat uniform plate body 411, the first heat pipe 412 and the second heat pipe 413 can be filled with a heat-conducting liquid, thereby playing a role of efficiently conducting heat, the first heat dissipation fin 42 is sleeved on a plurality of first heat pipes 412, and the second heat dissipation fin 43 is sleeved on a plurality of second heat pipes 413, so that the first heat dissipation fin 42 can conduct heat in the internal circulation air duct 10 to the second heat dissipation fin 43 through the first heat pipe 412, the heat uniform plate body 411 and the second heat pipe 413, and the heat dissipation fan 5 cools the second heat dissipation fin 43, so that the 3D heat uniform plate 41 as a whole is kept in a low-temperature state, and the first heat dissipation fin 42 is in a low-temperature state, thereby ensuring that heat in the internal circulation air duct 10 is taken away.

[0034] Because the heat generated by the LCD screen 23 is high, the temperature in the internal circulation air duct 10 is high, when the internal circulation fan is started, the air in the internal circulation air duct 10 can be circulated and flow, heat exchange is performed when the air flows through the first heat dissipation fin 42, so that the air is cooled to cold air, and the cold air cools the LCD screen 23 by flowing through the LCD screen 23, so that air cooling internal circulation is formed, and the heat generated by the LCD screen 23 can be quickly taken away. Because the first heat dissipation fin 42 is heated when heat exchange is performed, the heat is conducted to the second heat dissipation fin 43 outside the shell 1 through the connected 3D heat uniform plate 41, and the second heat dissipation fin 43 is cooled by the heat dissipation fan 5, so that the 3D heat uniform plate 41 and the first heat dissipation fin 42 are in a low-temperature state, thereby effectively realizing rapid heat dissipation of the LCD screen 23, effectively ensuring normal work of the LCD screen 23, and prolonging the service life of the LCD screen 23.

[0035] According to the technical scheme, the closed light engine has a newly designed 3D heat-dissipating plate 41. Compared with the prior art, the 3D heat-dissipating plate 41 is improved in structure and includes a heat-dissipating plate body 411 and first and second heat pipes 412 and 413 connected to two sides of the heat-dissipating plate body 411. The first and second heat pipes 412 and 413 are both sleeved with heat-dissipating fins to form a super-efficient heat-dissipating module 4. The LCD screen 23 can be cooled by internal circulation, and the heat-dissipating effect is good, the heat-dissipating efficiency is high, the noise is low, dust and dirt are prevented from entering the shell 1 to contaminate the LCD screen 23, and the occurrence of black spots on the LCD screen 23 is effectively avoided, which is beneficial to improving the user experience.

[0036] Specifically, the shell 1 has a first cavity 101 and a second cavity 102 arranged in a top-bottom manner inside. The shell 1 further has first and second ventilation openings 103 and 104 for connecting the first and second cavities 101 and 102. The first cavity 101, the first ventilation opening 103, the second cavity 102 and the second ventilation opening 104 jointly enclose the internal circulation air duct 10. The LCD screen 23 is located in the first cavity 101, and the internal circulation fan 3 and the first heat-dissipating fins 42 are located in the second cavity 102. When the internal circulation fan 3 is started, air in the internal circulation air duct 10 flows from the second cavity 102 to the first cavity 101 through the first ventilation opening 103, and then flows back to the second cavity 102 through the second ventilation opening 104.

[0037] The shell 1 includes an upper shell 11, a middle shell 12 and a lower shell 13 arranged in a top-bottom manner. The upper shell 11 is a plate structure, and the middle and lower shells 12 and 13 are both pot structures with openings facing upwards. The upper shell 11 covers the opening of the middle shell 12 to enclose the first cavity 101, and the opening of the lower shell 13 is connected to the bottom of the middle shell 12 to enclose the second cavity 102. The first and second ventilation openings 103 and 104 are both arranged at the bottom of the middle shell 12. The shell 1 is reasonable in structure and convenient to manufacture and assemble.

[0038] Preferably, the air inlet of the internal circulation fan 3 is arranged opposite to the second ventilation opening 104, and the air outlet of the internal circulation fan 3 is arranged opposite to the first heat-dissipating fins 42. In this way, the air suction efficiency can be improved, the air flow in the internal circulation air duct 10 is facilitated, and the cooling efficiency is improved, which is beneficial to the heat dissipation of the LCD screen 23. In addition, a PWN speed regulation function can be added to the internal circulation fan 3, and a temperature sensor can be arranged in the first cavity 101 to intelligently regulate the speed of the internal circulation fan 3 at different temperatures, so as to maintain the heat-dissipating stability of the first cavity 101.

[0039] The optical device in the embodiment is arranged in the first cavity 101, and the optical device further comprises a first Fresnel lens 21, heat insulation glass 22, a second Fresnel lens 24 and a mirror 25, which are sequentially arranged in the direction from the first vent 103 to the second vent 104. The first Fresnel lens 21, the heat insulation glass 22, the LCD screen 23, the second Fresnel lens 24 and the mirror 25 also generate heat, and being arranged in the first cavity 101 is conducive to heat dissipation.

[0040] Preferably, the LCD screen 23 in the embodiment is arranged opposite to the first vent 103, so that the LCD screen 23 can be first contacted with cold air when air circulation starts, thereby improving heat dissipation efficiency.

[0041] Specifically, the uniform temperature plate body 411 in the embodiment comprises an upper plate 4111 and a lower plate 4112, the upper plate 4111 and the lower plate 4112 are connected at edges to enclose a first cavity 401, inner surfaces of the upper plate 4111 and the lower plate 4112 are provided with first capillary structures, the upper plate 4111 and the lower plate 4112 are both provided with a plurality of mounting holes 402, the mounting holes 402 of the upper plate 4111 are arranged to mount the first heat pipe 412, the mounting holes 402 of the lower plate 4112 are arranged to mount the second heat pipe 413, the first heat pipe 412 and the second heat pipe 413 are both arranged to form a second cavity in communication with the first cavity 401, inner walls of the first heat pipe 412 and the second heat pipe 413 are both provided with second capillary structures, and the second capillary structures are connected to the first capillary structures. The 3D uniform temperature plate 41 designed in this way has high heat exchange efficiency, is conducive to heat dissipation, and the first capillary structures and the second capillary structures can make liquid flow more smoothly.

[0042] Preferably, the inner circulation fan 3 and the heat dissipation fan 5 in the embodiment are both vortex fans.

[0043] Preferably, the first cavity 401 is provided with a support column 403, and the support column 403 supports the upper plate 4111 and the lower plate 4112. This design can prevent the uniform temperature plate body 411 from being deformed.

[0044] The embodiment also provides an LCD projector, which comprises a projection shell 1 and a sealed optical engine with the 3D uniform temperature plate 41 in the embodiment arranged in the projection shell 1. The LCD projector has the beneficial effects of the sealed optical engine in the embodiment, which will not be described herein.

[0045] The above-described embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but can not therefore be understood as the limitation of the utility model scope. It should be pointed out that for ordinary skilled person in the art, without departing from the utility model concept, several deformations and improvements can be made, which belong to the protection scope of the utility model.

Claims

1. A sealed optical engine with a 3D vapor chamber, characterized in that, include: Housing, optical components, internal circulation fan, heat dissipation module, and heat dissipation fan; An internal circulation air duct is formed inside the housing. The optical device and the internal circulation fan are both disposed within the internal circulation air duct. The optical device includes an LCD screen. The heat dissipation module includes a 3D vapor chamber, a first heat dissipation fin, and a second heat dissipation fin. The 3D vapor chamber includes a vapor chamber body and a first heat pipe and a second heat pipe connected to opposite sides of the vapor chamber body. The interiors of the first heat pipe and the second heat pipe are in communication with the vapor chamber body. The first heat dissipation fin is sleeved on the first heat pipe and located in the internal circulation air duct. The second heat dissipation fin is sleeved on the second heat pipe and located outside the housing. The heat dissipation fan is disposed outside the housing and is used to cool the second heat dissipation fin.

2. The sealed optical engine with a 3D heat spreader according to claim 1, characterized in that: The housing has a first cavity and a second cavity arranged vertically inside each other. The housing also has a first vent and a second vent that connect the first cavity and the second cavity. The first cavity, the first vent, the second cavity and the second vent together enclose the internal circulation air duct. The LCD screen is located in the first cavity, and the internal circulation fan and the first heat dissipation fins are located in the second cavity.

3. The sealed optical engine with a 3D heat spreader according to claim 2, characterized in that: The air inlet of the internal circulation fan is positioned directly opposite the second ventilation opening, and the air outlet of the internal circulation fan is positioned directly opposite the first heat dissipation fin.

4. The sealed optical engine with a 3D heat spreader according to claim 2, characterized in that: The housing includes an upper shell, a middle shell, and a lower shell arranged sequentially from top to bottom. The upper shell is a plate-like structure, and the middle shell and the lower shell are both basin-shaped structures with their openings facing upwards. The upper shell covers the opening of the middle shell to enclose the first cavity, and the opening of the lower shell is connected to the bottom of the middle shell to enclose the second cavity. The first vent and the second vent are both located at the bottom of the middle shell.

5. The sealed optical engine with a 3D heat spreader according to claim 2, characterized in that: The optical device further includes a first Fresnel lens, heat-insulating glass, a second Fresnel lens, and a reflector, which are arranged sequentially along the direction from the first vent to the second vent.

6. The sealed optical engine with a 3D heat spreader according to claim 2, characterized in that: The LCD screen is positioned directly opposite the first vent.

7. The sealed optical engine with a 3D heat spreader according to any one of claims 1-6, characterized in that: The heat spreader includes an upper plate and a lower plate, the edges of which are connected to form a first chamber. The inner surfaces of the upper and lower plates are provided with a first capillary structure. Both the upper and lower plates are provided with a plurality of mounting ports. The mounting ports of the upper plate are used to install the first heat pipe, and the mounting ports of the lower plate are used to install the second heat pipe. The interiors of the first and second heat pipes each form a second chamber that communicates with the first chamber. The inner walls of the first and second heat pipes are provided with a second capillary structure, and the second capillary structure is connected to the first capillary structure.

8. The sealed optical engine with a 3D heat spreader according to claim 7, characterized in that: Both the internal circulation fan and the cooling fan are vortex fans.

9. The sealed optical engine with a 3D heat spreader according to claim 7, characterized in that: The first chamber is provided with a support column, which supports the upper plate and the lower plate.

10. An LCD projector, characterized in that, It includes a projection housing and a sealed optical engine with a 3D heat spreader as described in any one of claims 1-9, disposed in the projection housing.

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