CN222914021U

CN222914021U - A closed optical machine and projector with multiple air paths and efficient heat dissipation

Info

Publication number: CN222914021U
Application number: CN202421744814.1U
Authority: CN
Inventors: 徐宝山; 陈能盛
Original assignee: Guangzhou Rigal Electronics Co ltd
Current assignee: Guangzhou Rigal Electronics Co ltd
Priority date: 2024-07-22
Filing date: 2024-07-22
Publication date: 2025-05-27
Anticipated expiration: 2034-07-22

Abstract

The utility model relates to a multi-air-path high-efficiency heat-dissipation closed type optical engine and a projector, wherein the closed type optical engine comprises an optical engine shell, an inner circulation fan unit, a heat dissipation module and an outer circulation fan unit, a first heat dissipation air channel is arranged on a first side of an LCD screen, a second heat dissipation air channel is arranged on a second side of the LCD screen, a first end of the first heat dissipation air channel, a second heat exchange cavity, a middle heat exchange cavity, a first heat exchange cavity and a second end of the first heat dissipation air channel are sequentially communicated to form a horizontal circulation heat dissipation channel, and a first end of the second heat dissipation air channel, a middle heat exchange cavity, a first ventilation opening, a second accommodating cavity, a second ventilation opening and a second end of the second heat dissipation air channel are sequentially communicated to form a vertical circulation heat dissipation channel.

Description

Closed ray apparatus and projector of high-efficient heat dissipation of many wind ways

Technical Field

The utility model relates to the technical field of LCD projectors, in particular to a multi-air-path high-efficiency heat-dissipation closed optical machine and a projector.

Background

The LCD light machine (i.e. the projection light machine) is the most important component in the LCD projector, and the LCD screen absorbs a lot of heat during the operation of the LCD light machine, so that the LCD screen needs to be forcedly cooled and cooled, and the LCD light machine is mainly divided into two types according to the type of heat dissipation, namely a closed light machine and an open light machine.

The closed type optical machine can effectively prevent dust and pollutants from entering the optical path, so that the influence of the dust on the LCD screen is obviously reduced, the projection equipment can be widely suitable for various use occasions, and the service life of the projection equipment can be greatly prolonged. However, the closed environment brings great difficulty to the heat dissipation of the optical elements inside the optical machine, and how to efficiently bring out the internal heat without damaging the closed space is the key point of the heat dissipation of the optical machine at present.

The heat is usually discharged from the sealed optical machine in an internal circulation and external circulation mode, and aiming at the sealed optical machine with higher power, the related heat dissipation scheme in the prior art mainly takes away the heat in the optical machine through a semiconductor refrigerating sheet or directly dissipates heat by using a water cooling system. The semiconductor refrigerating sheet not only can increase the power consumption of the projector, but also can generate a large amount of extra heat, so that a small burden is added to an external circulation heat dissipation system of the projector, and the heat dissipation efficiency of the whole projector is seriously affected, and on the other hand, the related production process of water cooling heat dissipation is still immature, the use cost is high, and the risk of liquid leakage exists. If the two heat dissipation schemes are not adopted, in order to ensure the cooling efficiency, the fan power and the radiator volume are required to be set larger, but the noise can be increased when the fan power is large, the use experience is affected, and a single radiator with a larger volume occupies more space and cannot reasonably design the inner structure of the projector.

Disclosure of utility model

Based on the above, the utility model aims to overcome the defects of the prior art and provide a multi-wind-path high-efficiency heat-dissipation closed optical machine and a projector.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

a multi-air-path high-efficiency heat-dissipation closed type air machine comprises an air machine shell, an inner circulation air machine set, a heat dissipation module and an outer circulation air machine set;

The optical machine shell comprises a heat dissipation top shell, a middle shell and a bottom shell which are sequentially connected from top to bottom, wherein the heat dissipation top shell and the middle shell jointly enclose a first accommodating cavity, the bottom shell and the middle shell jointly enclose a second accommodating cavity, a first ventilation opening and a second ventilation opening are arranged at the bottom of the middle shell, a partition piece and an imaging module are arranged in the first accommodating cavity,

The imaging module comprises a first lens, an LCD screen and a second lens which are sequentially arranged along the light emitting direction, the first accommodating cavity is divided into a first heat dissipation air channel, a second heat dissipation air channel, a middle heat exchange cavity, a first heat exchange cavity and a second heat exchange cavity by the partition piece, the first lens, the LCD screen and the second lens, wherein the LCD screen is provided with a first side and a second side which are opposite, the first heat dissipation air channel is positioned on the first side of the LCD screen, and the second heat dissipation air channel is positioned on the second side of the LCD screen;

The first end, the middle heat exchange cavity, the first vent, the second accommodating cavity, the second vent and the second end of the second heat dissipation air channel are sequentially communicated to form a vertical circulation heat dissipation channel;

The internal circulation fan unit comprises a first internal circulation fan and a second internal circulation fan, the first internal circulation fan is arranged in the first heat exchange cavity, and the second internal circulation fan is arranged in the second accommodating cavity;

The heat radiation module comprises a first radiator and a second radiator, wherein the cold end of the first radiator is arranged in the first heat exchange cavity, the cold end of the second radiator is arranged in the second heat exchange cavity, the hot ends of the first radiator and the second radiator are both arranged outside the optical machine shell, one side of the heat radiation top shell, which faces the middle heat exchange cavity, is provided with a plurality of shell cold end fins which are arranged at intervals, and one side of the heat radiation top shell, which faces away from the middle heat exchange cavity, is provided with a plurality of shell hot end fins which are arranged at intervals;

The outer circulation fan set is arranged outside the optical machine shell, the outer circulation fan set comprises a first outer circulation fan, a second outer circulation fan and a third outer circulation fan, the first outer circulation fan is used for radiating heat of the hot end of the first radiator, the second outer circulation fan is used for radiating heat of the hot end of the second radiator, and the third outer circulation fan is used for radiating heat of the shell hot end fins.

The heat dissipation top shell is used for replacing the plastic top shell of the existing optical engine shell, the fins with large areas on the heat dissipation top shell can serve as a radiator to improve heat dissipation efficiency, the existing semiconductor refrigerating fin heat dissipation scheme is abandoned, excessive space occupied by heat dissipation parts is avoided, heat of the radiator is brought to the outside of the optical engine shell through the inner circulation fan unit, and the outer structure is skillfully designed to take away the heat of the outer circulation fan unit, so that the heat dissipation of the whole optical engine is completed. The application aims to complete the heat dissipation of the closed optical machine by the position design of the heat dissipation channel, the fans and the heat dissipater without using the semiconductor refrigerating sheets and liquid cooling heat dissipation, thereby improving the heat dissipation efficiency of the projector, reducing the overall power consumption and the volume of the projector, ensuring the safe and stable operation of the projector, and taking the tightness of the optical machine, the heat dissipation efficiency, the structural compactness and the safety stability into consideration.

As an alternative or preferred embodiment, the first heat dissipation air duct is located between the LCD screen and the first lens, the second heat dissipation air duct is located between the LCD screen and the second lens, and the middle heat exchange cavity is located on a side of the second lens facing away from the LCD screen.

As an alternative or preferred embodiment, a plurality of the shell hot end fins are arranged at intervals along a horizontal direction to form a shell ventilation gap, the hot end of the first radiator comprises a plurality of first hot end fins which are arranged at intervals along a vertical direction to form a first ventilation gap, the hot end of the second radiator comprises a plurality of second hot end fins which are arranged at intervals along the vertical direction to form a second ventilation gap, the first ventilation gap extends along a first direction, the shell ventilation gap and the second ventilation gap both extend along a second direction, and the first direction intersects with the second direction.

As an alternative or preferred embodiment, the second external circulation fan and the third external circulation fan are symmetrically disposed at opposite sides of the second direction.

As an alternative or preferred embodiment, a fan mounting position for mounting the first external circulation fan is arranged on the outer side of the optical machine shell.

As an optional or preferred embodiment, the sealed optical engine further includes a light source module, the light source module includes an LED light source, a light funnel and a light funnel housing, an opening is provided on the middle housing corresponding to the side wall of the LCD screen, the light funnel housing is installed at the opening, the light funnel is disposed in the light funnel housing, a light outlet of the light funnel faces the LCD screen, and a light inlet of the light funnel is disposed in the LED light source.

As an alternative or preferred embodiment, the sealed optical engine further includes an LED radiator, the LED radiator is configured to radiate the LED light source, the light funnel housing is formed with a mounting cavity, the second external circulation fan, the third external circulation fan and the LED radiator are all disposed in the mounting cavity, and the second external circulation fan and the third external circulation fan are further configured to radiate the LED radiator.

As an alternative or preferred embodiment, at least a portion of the hot end of the second heat sink is surrounded by the mounting cavity, the hot end of the second heat sink and the LED heat sink being located on opposite sides of the second external circulation fan, respectively.

As an alternative or preferred embodiment, the first inner circulation fan, the second inner circulation fan and the first outer circulation fan are all vortex fans, and the second outer circulation fan and the third outer circulation fan are all axial flow fans.

The projector comprises an outer shell and the sealed optical machine with the multi-air-path efficient heat dissipation, wherein the sealed optical machine is installed in the outer shell, and a plurality of positions of the outer shell are provided with ventilation holes.

For a better understanding and implementation, the present utility model is described in detail below with reference to the drawings.

Drawings

FIG. 1 is a schematic view of a closed optical engine according to an embodiment of the present application;

FIG. 2 is an exploded view of a sealed optical engine according to an embodiment of the present application;

FIG. 3 is a schematic view of the heat dissipating top shell and portions of the dividers of FIG. 1 removed;

FIG. 4 is a schematic diagram of an explosion structure of an optical engine housing according to an embodiment of the present application;

FIG. 5 is a schematic view showing an internal structure of a part of a hermetic optical engine according to an embodiment of the present application;

FIG. 6 is a schematic diagram of air circulation of a horizontal circulation heat dissipation channel;

FIG. 7 is a schematic view showing an internal structure of a part of a hermetic optical engine according to an embodiment of the present application;

FIG. 8 is an air circulation schematic of a vertical circulation heat dissipation channel;

FIG. 9 is a schematic diagram of the external structure of the sealed optical engine according to the embodiment of the application;

FIG. 10 is a schematic diagram of a projector according to an embodiment of the application;

Reference numerals illustrate:

11. Heat dissipating top case, 111, case cold end fin, 112, case hot end fin, 12, middle case, 121, first vent, 122, second vent, 13, bottom case, 141, first heat dissipating air duct, 142, second heat dissipating air duct, 143, middle heat exchanging cavity, 144, first heat exchanging cavity, 145, second heat exchanging cavity, 15, second accommodating cavity, 16, partition, 17, fan mounting position, 18, first accommodating cavity, 21, first lens, 22, heat insulating glass, 23, LCD screen, 24, second lens, 31, first inner circulating fan, 32, second inner circulating fan, 41, first radiator, 411, first hot end fin, 42, second radiator, 421, second hot end fin, 51, first outer circulating fan, 52, second outer circulating fan, 53, third outer circulating fan, 61, LED light source, 62, light funnel, 63, light funnel, 631, mounting cavity, 64, LED radiator, 71, 72, projection lens, 8, outer casing, 81, vent.

Detailed Description

For further illustration of the various embodiments, the utility model is provided with the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments and together with the description, serve to explain the principles of the embodiments. With reference to these matters, one of ordinary skill in the art will understand other possible implementations and advantages of the present utility model.

In the description of the present 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. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus are not to be construed as limiting the present utility model.

Referring to fig. 1 to 9, the present embodiment provides a multi-wind path efficient heat dissipation sealed type optical engine, which includes an optical engine housing, an inner circulation fan set, a heat dissipation module and an outer circulation fan set.

As shown in fig. 1-4 and 6, the optical engine housing includes a heat dissipation top shell 11, a middle shell 12 and a bottom shell 13 that are sequentially connected from top to bottom, the heat dissipation top shell 11 and the middle shell 12 enclose a first accommodating cavity 18 together, the bottom shell 13 and the middle shell 12 enclose a second accommodating cavity 15 together, a first ventilation opening 121 and a second ventilation opening 122 are provided at the bottom of the middle shell 12, and a partition 16 and an imaging module are provided in the first accommodating cavity 18. The heat dissipation top shell 11 is in a plate-shaped structure, the middle shell 12 and the bottom shell 13 are both in upward open basin-shaped structures, the heat dissipation top shell 11 covers the opening of the middle shell 12 to jointly enclose a first accommodating cavity 18 with the middle shell 12, and the opening of the bottom shell 13 is abutted to the bottom of the middle shell 12 to jointly enclose a second accommodating cavity 15. The heat dissipation top shell 11 has a heat dissipation function, one side of the heat dissipation top shell 11 facing the middle shell 12 is provided with a plurality of shell cold end fins 111 which are arranged at intervals, and one side of the heat dissipation top shell facing away from the middle shell 12 is provided with a plurality of shell hot end fins 112 which are arranged at intervals, so that the light machine shell has the heat dissipation function, no additional components are needed, and the heat dissipation efficiency is greatly improved.

As shown in fig. 3 to 4, the imaging module includes a first lens 21, an LCD screen 23, and a second lens 24 sequentially arranged along the light emitting direction, wherein the first lens 21 is a rear fresnel lens, the second lens 24 is a front fresnel lens, and the separator 16 may include a structure such as a partition plate and an LCD mounting bracket, so long as the separation effect can be achieved. The partition 16, the first lens 21, the LCD screen 23 and the second lens 24 jointly partition the first accommodating chamber 18 into a first heat dissipation air channel 141, a second heat dissipation air channel 142, a middle heat exchange chamber 143, a first heat exchange chamber 144 and a second heat exchange chamber 145, wherein the LCD screen 23 has a first side and a second side opposite to each other, the first heat dissipation air channel 141 is located on the first side of the LCD screen 23, and the second heat dissipation air channel 142 is located on the second side of the LCD screen 23. The first and second heat dissipation air channels 141 and 142 have opposite first and second ends, respectively.

The first end of the first heat dissipation air channel 141, the second heat exchange cavity 145, the middle heat exchange cavity 143, the first heat exchange cavity 144 and the second end of the first heat dissipation air channel 141 are sequentially communicated to form a horizontal circulation heat dissipation channel, and the first end of the second heat dissipation air channel 142, the middle heat exchange cavity 143, the first ventilation opening 121, the second accommodating cavity 15, the second ventilation opening 122 and the second end of the second heat dissipation air channel 142 are sequentially communicated to form a vertical circulation heat dissipation channel. Specifically, in this embodiment, the first heat dissipation air duct 141 is located between the LCD panel 23 and the first lens 21, the second heat dissipation air duct 142 is located between the LCD panel 23 and the second lens 24, the middle heat exchange cavity 143 is located on a side of the second lens 24 opposite to the LCD panel 23, that is, a first side of the LCD panel 23 faces the first lens 21, a second side of the LCD panel 23 faces the second lens 24, a first end of the first heat dissipation air duct 141 is a right end, a second end is a left end, a first end of the second heat dissipation air duct 142 is a top end, and a second end is a bottom end, so that the overall layout is more reasonable, and the heat dissipation efficiency is higher. Of course, in other embodiments, the positions of the first heat dissipation air channel 141 and the second heat dissipation air channel 142 may be opposite to the present embodiment, that is, the first heat dissipation air channel 141 is located between the LCD screen 23 and the second lens 24, and the second heat dissipation air channel 142 is located between the LCD screen 23 and the first lens 21, so that the arrangement can be achieved only by adjusting the specific separation position of the separating member 16, and the overall heat dissipation efficiency is not affected.

The internal circulation fan unit comprises a first internal circulation fan 31 and a second internal circulation fan 32, the first internal circulation fan 31 is arranged in the first heat exchange cavity 144 and is used for driving air of the horizontal circulation heat dissipation channel to circulate, and the second internal circulation fan 32 is arranged in the second accommodating cavity 15 and is used for driving air of the vertical circulation heat dissipation channel to circulate. It can be seen that, by the above arrangement, the first heat dissipation air duct 141 and the second heat dissipation air duct 142 can be formed on two opposite sides of the LCD screen 23 to dissipate heat of the LCD screen 23, and the first heat dissipation air duct 141 and the second heat dissipation air duct 142 respectively participate in forming a horizontal circulation heat dissipation channel and a vertical circulation heat dissipation channel, so as to ensure sufficient heat dissipation efficiency. The horizontal circulation heat dissipation channel and the vertical circulation heat dissipation channel share the middle heat exchange cavity 143, so that two air flows can mutually disturb in the middle heat exchange cavity 143 and heat mass exchange occurs, and the excessive temperature difference between the horizontal circulation flow field and the vertical circulation flow field can be prevented, and the excessive difference of the heat dissipation efficiency of the components is avoided.

The heat dissipation module includes a first heat radiator 41 and a second heat radiator 42, a cold end 412 of the first heat radiator 41 is disposed in the first heat exchange cavity 144, a cold end 422 of the second heat radiator 42 is disposed in the second heat exchange cavity 145, and hot ends of the first heat radiator 41 and the second heat radiator 42 are disposed outside the optical engine housing, so that the first heat radiator 41 and the second heat radiator 42 can provide a cold source for a horizontal circulation heat dissipation channel, and heat dissipation efficiency is improved. Specifically, the side of the heat dissipation top shell 11 facing the middle heat exchange cavity 143 is provided with the plurality of shell cold end fins 111 arranged at intervals, and the side of the heat dissipation top shell facing away from the middle heat exchange cavity 143 is provided with the plurality of shell hot end fins 112 arranged at intervals, so that it can be known that the heat dissipation top shell 11 can provide a cold source for the middle heat exchange cavity 143 to participate in heat exchange of the horizontal circulation heat dissipation channel and the vertical circulation heat dissipation channel.

The outer circulation fan set is arranged outside the optical engine shell, the outer circulation fan set comprises a first outer circulation fan 51, a second outer circulation fan 52 and a third outer circulation fan 53, the first outer circulation fan 51 is used for radiating heat of the hot end of the first radiator 41, the second outer circulation fan 52 is used for radiating heat of the hot end of the second radiator 42, and the third outer circulation fan 53 is used for radiating heat of the shell hot end fins 112.

It will be appreciated that when the sealed optical engine is operated, on one hand, as shown in fig. 5 and 6, wherein a black arrow in fig. 6 is an air circulation track of the horizontal circulation heat dissipation channel, the first internal circulation fan 31 drives the air circulation of the horizontal circulation heat dissipation channel, so that the air takes away the heat of the LCD screen 23 and the first lens 21 from the first heat dissipation air channel 141, then flows through the second heat exchange cavity 145 to first conduct away the heat by the cold end 422 of the second radiator 42, then flows through the middle heat exchange cavity 143 to the first heat exchange cavity 144 to continuously conduct away the heat by the cold end 412 of the first radiator 41 and finally flows back to the air inlet of the first internal circulation fan 31, and on the other hand, as shown in fig. 7 and 8, wherein a black arrow in fig. 8 is an air circulation track of the vertical circulation heat dissipation channel, the second internal circulation fan 32 drives the air circulation of the vertical circulation heat dissipation channel, so that the air takes away the heat of the LCD screen 23 and the second lens 24 from the second heat dissipation air channel 142, then flows through the middle heat exchange cavity 143 and flows back to the cold end of the housing fin 111 to conduct away the heat, and then flows back to the air through the first air vent 121 to the air inlet of the second housing 15 to the air inlet of the second circulation fan 32. It should be noted that, the horizontal circulation heat dissipation channel and the vertical circulation heat dissipation channel both share the middle heat exchange cavity 143, so that two air flows can mutually disturb in the middle heat exchange cavity 143 and perform heat mass exchange, so that the excessive temperature difference between the horizontal circulation flow field and the vertical circulation flow field can be prevented, and the excessive difference of the heat dissipation efficiency of the components can be avoided. In addition, the external circulation fan set radiates heat from the hot end of the first radiator 41, the hot end of the second radiator 42 and the shell hot end fins 112 outside the optical engine shell, so that the cold end 412 of the first radiator 41, the cold end 422 of the second radiator 42 and the shell cold end fins 111 can be kept in a low-temperature state, which is beneficial to improving the heat radiation efficiency.

As can be seen from the above, the present application uses the heat dissipation top shell 11 to replace the plastic top shell of the existing optical engine housing, the heat dissipation top shell 11 has large area fins to serve as a radiator to improve heat dissipation efficiency, and the heat dissipation scheme of the existing semiconductor cooling fin is abandoned, meanwhile, the excessive space occupied by the heat dissipation component is avoided, the heat of the radiator is brought to the outside of the optical engine housing through the internal circulation fan set, and then the external structure is skillfully designed to take away the heat of the external circulation fan set, so as to complete the heat dissipation of the whole engine. The application aims to complete the heat dissipation of the closed optical machine by the position design of the heat dissipation channel, the fans and the heat dissipater without using the semiconductor refrigerating sheets and liquid cooling heat dissipation, thereby improving the heat dissipation efficiency of the projector, reducing the overall power consumption and the volume of the projector, ensuring the safe and stable operation of the projector, and taking the tightness of the optical machine, the heat dissipation efficiency, the structural compactness and the safety stability into consideration.

Referring to fig. 9, the plurality of shell hot end fins 112 are arranged at intervals along the horizontal direction to form a shell ventilation gap, the hot end of the first heat sink 41 includes a plurality of first hot end fins 411 arranged at intervals along the vertical direction to form a first ventilation gap, the hot end of the second heat sink 42 includes a plurality of second hot end fins 421 arranged at intervals along the vertical direction to form a second ventilation gap, the first ventilation gap extends along the first direction, the shell ventilation gap and the second ventilation gap both extend along the second direction, and the first direction intersects the second direction. By this arrangement, since the arrangement modes of the shell hot end fin 112, the first hot end fin 411 and the second hot end fin 421 are different from each other, it is ensured that the external circulation air paths are smooth, and the external circulation air paths are not easy to interfere, that is, the hot end of the first radiator 41 is ensured to be stably radiated by the first external circulation fan 51, the hot end of the second radiator 42 is ensured to be stably radiated by the second external circulation fan 52, and the shell hot end fin 112 is ensured to be stably radiated by the third external circulation fan 53.

Preferably, the second external circulation fan 52 and the third external circulation fan 53 in this embodiment are symmetrically disposed on two opposite sides of the second direction, so as to improve symmetry of the overall structure and improve space utilization.

Preferably, in this embodiment, a fan mounting position 17 for mounting the first external circulation fan 51 is disposed on the outer side of the optical engine housing, so that the first external circulation fan 51 is convenient to mount. The fan mounting location 17 is a groove-like structure.

Preferably, the sealed optical engine of this embodiment further includes a light source module, the light source module includes an LED light source 61, a light funnel 62 and a light funnel housing 63, an opening is formed on the side wall of the middle shell 12 corresponding to the LCD screen 23, the light funnel housing 63 is mounted at the opening, the light funnel 62 is disposed in the light funnel housing 63, a light outlet of the light funnel 62 faces the LCD screen 23, and a light inlet of the light funnel 62 is disposed in the LED light source 61. The imaging module further comprises a heat insulating glass 22 arranged between the first lens 21 and the LCD screen 23, the closed optical engine further comprises a projection module, the projection module comprises a reflecting mirror 71 and a projection lens 72, and the reflecting mirror 71 is arranged in the middle heat exchange cavity 143 to reflect light rays emitted by the second lens 24 to the projection lens 72. The light emitted from the LED light source 61 passes through the light funnel 62, the first lens 21, the insulating glass 22, the LCD panel 23, the second lens 24, and the reflecting mirror 71 in this order, and then is emitted from the projection lens 72, thereby forming a projection image.

Preferably, the sealed optical engine of the present embodiment further includes an LED radiator 64, where the LED radiator 64 is configured to radiate heat from the LED light source 61, so as to effectively ensure normal operation of the LED light source 61 and prolong the service life of the LED light source 61. Wherein, the light funnel housing 63 is formed with a mounting cavity 631, the second external circulation fan 52, the third external circulation fan 53 and the LED radiator 64 are all disposed in the mounting cavity 631, and the second external circulation fan 52 and the third external circulation fan 53 are also used for radiating heat from the LED radiator 64. This can improve the utilization ratio of the second external circulation fan 52 and the third external circulation fan 53, and can fully exhibit the performance. Wherein at least a portion of the hot end of the second heat sink 42 is surrounded by the mounting cavity 631, the hot end of the second heat sink 42 and the LED heat sink 64 are located on opposite sides of the second external circulation fan 52, respectively. Thus, when the second external circulation fan 52 is operated, air may be driven to flow through the hot end of the second heat sink 42 and the LED heat sink 64 while both are radiating heat.

In this embodiment, the first inner circulation fan 31, the second inner circulation fan 32, and the first outer circulation fan 51 are all vortex fans, the second outer circulation fan 52 and the third outer circulation fan 53 are all axial flow fans, and different fan arrangement modes are different, so that the arrangement is favorable to making the overall structural design more reasonable.

Referring to fig. 10, the present embodiment further provides a projector, which includes an outer housing 8 and the sealed optical engine with multiple air paths for efficient heat dissipation installed in the outer housing 8, wherein a plurality of air vents 81 are provided in the outer housing 8. The projector of the closed optical engine is favorable for miniaturization design, and has good heat dissipation effect and high sealing performance.

The above examples merely represent a few embodiments of the present utility model, which are described in more detail and are not to be construed as limiting the scope of the inventive manual self-centering vise. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model.

Claims

1. The sealed type optical engine with the multi-air-path high-efficiency heat dissipation function is characterized by comprising an optical engine shell, an inner circulation fan set, a heat dissipation module and an outer circulation fan set;

2. The sealed optical bench with efficient heat dissipation by multiple air paths according to claim 1, wherein:

The first heat dissipation air duct is located between the LCD screen and the first lens, the second heat dissipation air duct is located between the LCD screen and the second lens, and the middle heat exchange cavity is located at one side of the second lens, which is opposite to the LCD screen.

3. The sealed optical bench with efficient heat dissipation by multiple air paths according to claim 1, wherein:

The heat end of the first radiator comprises a plurality of first heat end fins which are arranged at intervals along the vertical direction to form a first ventilation gap, the heat end of the second radiator comprises a plurality of second heat end fins which are arranged at intervals along the vertical direction to form a second ventilation gap, the first ventilation gap extends along a first direction, the shell ventilation gap and the second ventilation gap both extend along a second direction, and the first direction is intersected with the second direction.

4. The sealed optical engine with multiple air paths for efficient heat dissipation according to claim 3, wherein:

The second external circulation fan and the third external circulation fan are symmetrically arranged on two opposite sides of the second direction.

5. The sealed optical bench with efficient heat dissipation by multiple air paths according to claim 1, wherein:

The outside of ray apparatus casing is provided with installs the fan installation position of first outer circulating fan.

6. The sealed optical bench with efficient heat dissipation by multiple air paths according to claim 1, wherein:

The LED display screen comprises a middle shell, and is characterized by further comprising a light source module, wherein the light source module comprises an LED light source, a light funnel and a light funnel shell, an opening is formed in the side wall of the middle shell, corresponding to the LCD screen, the light funnel shell is arranged at the opening, the light funnel is arranged in the light funnel shell, a light outlet of the light funnel faces the LCD screen, and a light inlet of the light funnel is arranged in the LED light source.

7. The sealed optical engine with multiple air paths for efficient heat dissipation according to claim 6, wherein:

the LED light source comprises an LED light source body, and is characterized by further comprising an LED radiator, wherein the LED radiator is used for radiating the LED light source, the light funnel shell is provided with a mounting cavity, the second outer circulation fan, the third outer circulation fan and the LED radiator are all arranged in the mounting cavity, and the second outer circulation fan and the third outer circulation fan are also used for radiating the LED radiator.

8. The sealed optical bench with efficient heat dissipation by multiple air paths according to claim 7, wherein:

And at least one part of the hot end of the second radiator is surrounded by the mounting cavity, and the hot end of the second radiator and the LED radiator are respectively positioned at two opposite sides of the second external circulation fan.

9. The sealed optical bench with efficient heat dissipation by multiple air paths according to any of claims 1-8, wherein:

the first internal circulation fan, the second internal circulation fan and the first external circulation fan are all vortex fans, and the second external circulation fan and the third external circulation fan are all axial flow fans.

10. A projector, comprising an outer casing and the sealed optical engine with multiple air paths for efficient heat dissipation according to any one of claims 1-9, wherein the sealed optical engine is installed in the outer casing, and a plurality of air vents are arranged at the outer casing.