CN221709925U - Efficient heat-dissipation projector sealing optical machine - Google Patents

Abstract

The utility model relates to a sealed optical machine for a projector, comprising a casing, an LCD screen, a first heat exchange module, a second heat exchange module and an internal circulation fan; a first heat dissipation channel and a second heat dissipation channel are formed in the casing, the first heat exchange module and the second heat exchange module are respectively installed on opposite sides of the casing, the first heat exchange module comprises a first cold surface radiator and a first hot surface radiator, the second heat exchange module comprises a second cold surface radiator and a second hot surface radiator, and the internal circulation fan is arranged on the casing to drive air to circulate between the first heat dissipation channel and the second heat dissipation channel. The sealed optical machine for a projector of the embodiment of the present application uses two heat exchange modules to dissipate heat for the LCD screen, and the arrangement positions of the two heat exchange modules are symmetrical, which can make the structure of the optical machine balanced, and it is not easy to make the internal structure of the optical machine stacked in one position, which effectively improves the space utilization rate, and the heat dissipation structure is reasonably designed, which can improve the heat dissipation efficiency of the LCD screen.

Description

A sealed optical machine for projector with high efficiency heat dissipation

Technical Field

The utility model relates to the technical field of LCD projectors, in particular to a sealed optical machine for projectors with high-efficiency heat dissipation.

Background Art

The key component of an LCD projector is the optical machine, which generally includes an LCD screen, a light source, and a light funnel. The main imaging process is that the light emitted by the light source is focused by the light funnel and then passes through the LCD screen, thus forming image light.

Since the light transmittance of the LCD screen is not high, a lot of heat will be generated when the optical engine is working. Existing optical engines are generally designed to be closed to form an internal circulation duct inside. The air in the internal circulation duct flows through the radiator driven by the fan to cool the LCD screen. However, most of the sealed optical engines on the market now often have only one heat exchange module for internal and external heat exchange of the optical engine. In order to improve the heat dissipation efficiency, the volume of the heat exchange module is usually increased. However, doing so will make the optical engine structure unbalanced and the heat dissipation efficiency is not optimal.

Utility Model Content

Based on this, the purpose of the present invention is to overcome the deficiencies of the prior art and provide a sealed optical machine for a projector.

In order to achieve the above purpose, the technical solution adopted by the utility model is:

A closed optical machine for a projector, comprising a housing, an LCD screen, a first heat exchange module, a second heat exchange module and an internal circulation fan;

The LCD screen is arranged in the casing, and a first heat dissipation channel and a second heat dissipation channel passing through opposite sides of the LCD screen are formed in the casing. The first heat exchange module and the second heat exchange module are respectively installed on opposite sides of the casing. The first heat exchange module includes a first cold surface radiator and a first hot surface radiator connected to conduct heat, and the second heat exchange module includes a second cold surface radiator and a second hot surface radiator connected to conduct heat. The air in the first heat dissipation channel enters the second heat dissipation channel after passing through the first cold surface radiator, and the air in the second heat dissipation channel enters the first heat dissipation channel after passing through the second cold surface radiator. The internal circulation fan is arranged on the casing to drive the air to circulate between the first heat dissipation channel and the second heat dissipation channel.

The projector sealed optical machine of the embodiment of the present application uses two heat exchange modules to dissipate heat for the LCD screen. The two heat exchange modules are arranged symmetrically, which can balance the structure of the optical machine and make it difficult for the internal structure of the optical machine to be stacked in one position, effectively improving the space utilization rate. The heat dissipation structure is reasonably designed. The first heat dissipation channel and the second heat dissipation channel pass through the opposite sides of the LCD screen respectively, which can greatly improve the heat dissipation efficiency of the LCD screen. The air passing through the first heat dissipation channel and the second heat dissipation channel can be cooled by the first cold surface radiator and the second cold surface radiator, ensuring that the circulating air is always in a low temperature state.

As an embodiment, it further includes a light source assembly and a light source heat sink, wherein the light source assembly is disposed in the housing, and the light source heat sink is disposed outside the housing for dissipating heat from the light source assembly.

As an implementation manner, the sealed optical engine of the projector further includes an external circulation fan, which is disposed outside the housing and is used to cool the light source radiator and the second heat surface radiator.

As an embodiment, the projector sealed optical engine also includes an external circulation shell, which is installed outside the casing and encloses an external circulation air duct with openings at both ends together with the casing, and the second heat surface radiator, external circulation fan, and light source radiator are arranged in sequence in the external circulation air duct.

As an embodiment, the first heat dissipation channel and the second heat dissipation channel both have an air inlet end and an air outlet end, the air outlet of the internal circulation fan is connected to the air inlet end of the second heat dissipation channel, the first cold surface radiator connects the air outlet end of the first heat dissipation channel with the air inlet end of the internal circulation fan, and the second cold surface radiator connects the air outlet end of the second heat dissipation channel with the air inlet end of the first heat dissipation channel.

As an embodiment, the first cold surface radiator includes an outer cover shell and a plurality of first heat dissipation fins spaced apart in the outer cover shell, and the outer cover shell covers the air outlet end of the first heat dissipation channel and the air inlet of the internal circulation fan.

As an implementation manner, the light source assembly includes a light funnel and an LED light source, the light outlet of the light funnel faces the LCD screen, and the LED light source is arranged at the light inlet of the light funnel.

As an embodiment, the light source heat sink includes a light source cold surface heat sink and a light source hot surface heat sink, the light source cold surface heat sink is attached to the side of the LED light source facing away from the light funnel, the light source hot surface heat sink is connected to the light source cold surface heat sink to conduct heat, and the external circulation fan cools the light source hot surface heat sink and the second hot surface heat sink.

As an implementation manner, it also includes a front Fresnel lens, a heat-insulating glass and a rear Fresnel lens, and the front Fresnel lens, the heat-insulating glass, the LCD screen and the rear Fresnel lens are arranged in sequence along the light emitting direction of the light funnel.

As an embodiment, a mounting sleeve is provided on the outside of the housing, the mounting sleeve is provided with an air inlet end of the first heat dissipation channel and an air outlet end of the second heat dissipation channel, and the second cold surface radiator is embedded in the mounting sleeve.

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

FIG1 is a schematic diagram of the structure of a sealed optical machine of a projector in an embodiment of the present application;

FIG2 is a schematic diagram of the internal structure of a sealed optical machine of a projector in an embodiment of the present application;

Description of reference numerals:

1. Casing; 11. First heat dissipation channel; 12. Second heat dissipation channel; 21. Front Fresnel lens; 22. Heat-insulating glass; 23. LCD screen; 24. Rear Fresnel lens; 31. First cold surface radiator; 311. Outer cover shell; 312. First heat dissipation fins; 32. First hot surface radiator; 41. Second cold surface radiator; 42. Second hot surface radiator; 5. Internal circulation fan; 6. Light source assembly; 61. Light funnel; 62. LED light source; 7. Light source radiator; 71. Light source cold surface radiator; 72. Light source hot surface radiator; 8. External circulation fan; 9. External circulation shell; 10. Mounting shell.

DETAILED DESCRIPTION

To further illustrate each embodiment, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which 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 contents, ordinary technicians in the field should be able to understand other possible implementation methods and advantages of the present invention.

In the description of the present invention, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "left", "right", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships 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, and therefore should not be understood as a limitation on the present invention.

Please refer to FIG. 1 and FIG. 2 . This embodiment provides a closed optical machine for a projector with high efficiency in heat dissipation, which includes: a housing 1 , an LCD screen 23 , a first heat exchange module, a second heat exchange module and an internal circulation fan 5 .

The LCD screen 23 is arranged in the casing 1, and a first heat dissipation channel 11 and a second heat dissipation channel 12 are formed in the casing 1, which pass through opposite sides of the LCD screen 23 respectively. The first heat exchange module and the second heat exchange module are respectively installed on opposite sides of the casing 1. The first heat exchange module includes a first cold surface radiator 31 and a first hot surface radiator 32 connected to conduct heat. The second heat exchange module includes a second cold surface radiator 41 and a second hot surface radiator 42 connected to conduct heat. The air in the first heat dissipation channel 11 passes through the first cold surface radiator 31 and then enters the second heat dissipation channel 12. The air in the second heat dissipation channel 12 passes through the second cold surface radiator 41 and then enters the first heat dissipation channel 11. The internal circulation fan 5 is arranged on the casing 1, and is used to drive the air to circulate between the first heat dissipation channel 11 and the second heat dissipation channel 12.

Through the above arrangement, when the internal circulation fan 5 is started, the air in the casing 1 can be driven to circulate. When the air is flowing, the air in the first heat dissipation channel 11 first flows through one side of the LCD screen 23 to cool the LCD screen 23 for the first time, and then flows through the first cold surface radiator 31 for heat exchange to be cooled and turned into cold air. The cold air enters the second heat dissipation channel 12 and flows through the other side of the LCD screen 23 to cool the LCD screen 23 for the second time, and then flows through the second cold surface radiator 41 for heat exchange to be cooled again and turned into cold air, and then the cold air enters the first heat dissipation channel 11 again and circulates in sequence. Since the first cold surface radiator 31 and the second cold surface radiator 41 will heat up during heat exchange, it is necessary to connect the first hot surface radiator 32 and the second hot surface radiator 42 outside the casing 1 to absorb the heat of the first cold surface radiator 31 and the second cold surface radiator 41, so that the first cold surface radiator 31 and the second cold surface radiator 41 are in a low temperature state, thereby effectively realizing the rapid heat dissipation of the LCD screen 23, effectively ensuring the normal operation of the LCD screen 23 and the safety of the whole machine, and extending the service life of the LCD screen 23. It can be seen from the above technical scheme that the projector sealed optical machine of this embodiment uses two heat exchange modules to dissipate heat for the LCD screen 23. The two heat exchange modules are arranged symmetrically, which can balance the structure of the optical machine and make it difficult for the internal structure of the optical machine to be stacked in one position, effectively improving the space utilization rate. In addition, the heat dissipation structure is reasonably designed. The first heat dissipation channel 11 and the second heat dissipation channel 12 pass through the opposite sides of the LCD screen 23 respectively, which can greatly improve the heat dissipation efficiency of the LCD screen 23. The air passing through the first heat dissipation channel 11 and the second heat dissipation channel 12 can be cooled by the first cold surface radiator 31 and the second cold surface radiator 41, ensuring that the circulating air is always in a low temperature state.

In this embodiment, the sealed optical machine of the projector further includes a light source assembly 6 and a light source radiator 7. The light source assembly 6 is arranged in the housing 1, and the light source radiator 7 is arranged outside the housing 1 for dissipating heat for the light source assembly 6. The light emitted by the light source assembly 6 passes through the LCD screen 23 to form image light. The light source radiator 7 can dissipate heat for the light source assembly 6 to ensure that the light source assembly 6 is always at a suitable working temperature, ensure its normal operation and the safety of the whole machine, and improve the service life. In order to facilitate the cooling of the light source radiator 7, preferably, the sealed optical machine of the projector in this embodiment further includes an external circulation fan 8, which is arranged outside the housing 1 for cooling the light source radiator 7 and the second hot surface radiator 42. The external circulation fan 8 can cool the light source radiator 7 and the second hot surface radiator 42 at the same time, which is conducive to improving the utilization rate of the external circulation fan 8, saving space, and reducing energy consumption. The second hot surface radiator 42 is cooled by the external circulation fan 8, so that the second cold surface radiator 41 can be in a low temperature state.

Preferably, the sealed optical machine of the projector in this embodiment also includes an external circulation shell 9, which is installed outside the casing 1 and encloses an external circulation air duct with openings at both ends together with the casing 1. The second hot surface radiator 42, external circulation fan 8, and light source radiator 7 are arranged in sequence in the external circulation air duct, thereby enhancing the external circulation heat dissipation effect, so that the second hot surface radiator 42 and the light source radiator 7 can be effectively cooled.

In this embodiment, the light source assembly 6 includes a light funnel 61 and an LED light source 62. The light outlet of the light funnel 61 faces the LCD screen 23, and the LED light source 62 is arranged at the light inlet of the light funnel 61. The light emitted by the LED light source 62 is collected by the light funnel 61 and then passes through the LCD screen 23, thereby forming the above-mentioned image light. Specifically, the light source radiator 7 includes a light source cold surface radiator 71 and a light source hot surface radiator 72. The light source cold surface radiator 71 is attached to the side of the LED light source 62 facing away from the light funnel 61, and the light source hot surface radiator 72 is connected to the light source cold surface radiator 71 to conduct heat. The external circulation fan 8 cools down the light source hot surface radiator 72 and the second hot surface radiator 42. The light source cold surface radiator 71 dissipates heat from the LED light source 62, and the light source hot surface radiator 72 is cooled by the external circulation fan 8, so that the light source cold surface radiator 71 is in a low temperature state. In this embodiment, the external circulation fan 8 is an axial flow fan, and the light source hot surface radiator 72 and the light source cold surface radiator 71 conduct heat through heat pipes. The air outlet of the external circulation fan 8 faces the light source hot surface radiator 72, and the air inlet faces the second hot surface radiator 42.

In this embodiment, the first heat dissipation channel 11 and the second heat dissipation channel 12 both have an air inlet end and an air outlet end, the air outlet of the internal circulation fan 5 is connected to the air inlet end of the second heat dissipation channel 12, the first cold surface radiator 31 connects the air outlet end of the first heat dissipation channel 11 with the air inlet end of the internal circulation fan 5, and the second cold surface radiator 41 connects the air outlet end of the second heat dissipation channel 12 with the air inlet end of the first heat dissipation channel 11. Therefore, when the internal circulation fan 5 is working, the air cools down one side of the LCD screen 23, enters the first cold surface radiator 31 from the air outlet end of the first heat dissipation channel 11 for cooling, then enters from the air inlet end of the second heat dissipation channel 12 through the internal circulation fan 5, cools down the other side of the LCD screen 23, and finally returns to the first heat dissipation channel 11 after passing through the second cold surface radiator 41. The heat dissipation efficiency of the projector sealed optical machine arranged in this way is high.

Among them, in this embodiment, the first cold surface radiator 31 includes an outer cover shell 311 and a plurality of first heat dissipation fins 312 arranged at intervals in the outer cover shell 311, and the outer cover shell 311 covers the air outlet end of the first heat dissipation channel 11 and the air inlet of the inner circulation fan 5, so that the air in the first heat dissipation channel 11 can enter the inner circulation fan 5 through the gaps between the plurality of first heat dissipation fins 312. The first hot surface radiator 32 is arranged outside the outer cover shell 311 and is directly connected to the outer cover shell 311, so that the heat conduction efficiency is higher.

Preferably, the housing 1 of the present embodiment is provided with a mounting sleeve 10 on the outside, the mounting sleeve 10 is provided with an air inlet end of the first heat dissipation channel 11 and an air outlet end of the second heat dissipation channel 12, and the second cold surface radiator 41 is embedded in the mounting sleeve 10, so that the air coming out of the second heat dissipation channel 12 passes through the second cold surface radiator 41 and enters the first heat dissipation channel 11, and such a setting can improve the installation efficiency of the second cold surface radiator 41. In the present embodiment, the second cold surface radiator 41 and the second hot surface radiator 42 are integrally arranged to improve the heat conduction efficiency between the second cold surface radiator 41 and the second hot surface radiator 42, and facilitate heat dissipation.

The sealed optical machine of the projector in this embodiment further includes a front Fresnel lens 21, a heat-insulating glass 22, and a rear Fresnel lens 24, which are arranged in sequence along the light-emitting direction of the light funnel 61. The light emitted by the LED light source 62 passes through the light funnel 61, the front Fresnel lens 21, the heat-insulating glass 22, the LCD screen 23, and the rear Fresnel lens 24 in sequence, and then is emitted from the projection lens to form a projection image.

The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model manual self-centering vise. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims (10)

1. A high-efficiency heat-dissipating projector enclosure light machine, comprising:

The device comprises a shell, an LCD screen, a first heat exchange module, a second heat exchange module and an internal circulation fan;

The LCD screen is arranged in the casing, a first heat dissipation channel and a second heat dissipation channel which respectively pass through two opposite sides of the LCD screen are formed in the casing, the first heat exchange module and the second heat exchange module are respectively arranged on two opposite sides of the casing, the first heat exchange module comprises a first cold-face radiator and a first hot-face radiator which are connected to conduct heat, the second heat exchange module comprises a second cold-face radiator and a second hot-face radiator which are connected to conduct heat, air in the first heat dissipation channel enters the second heat dissipation channel after passing through the first cold-face radiator, air in the second heat dissipation channel enters the first heat dissipation channel after passing through the second cold-face radiator, and the inner circulation fan is arranged on the casing and is used for driving air to circulate between the first heat dissipation channel and the second heat dissipation channel.

2. The sealed optical engine of claim 1, wherein:

The LED lamp further comprises a light source assembly and a light source radiator, wherein the light source assembly is arranged in the shell, and the light source radiator is arranged outside the shell and used for radiating the light source assembly.

3. The sealed optical engine of claim 2, wherein:

the heat source radiator comprises a shell, a first hot-face radiator, a second hot-face radiator, an outer circulating fan and a heat source radiator.

4. A projector containment ray apparatus according to claim 3, wherein:

The heat radiator comprises a shell, and is characterized by further comprising an outer circulation shell, wherein the outer circulation shell is arranged outside the shell and surrounds an outer circulation air duct with two open ends with the shell, and the second hot-face radiator, the outer circulation fan and the light source radiator are sequentially arranged in the outer circulation air duct.

5. The sealed optical engine of claim 4, wherein:

The first heat dissipation channel and the second heat dissipation channel are respectively provided with an air inlet end and an air outlet end, the air outlet of the inner circulation fan is in butt joint with the air inlet end of the second heat dissipation channel, the first cold surface radiator is used for communicating the air outlet end of the first heat dissipation channel with the air inlet of the inner circulation fan, and the second cold surface radiator is used for communicating the air outlet end of the second heat dissipation channel with the air inlet end of the first heat dissipation channel.

6. The sealed optical engine of claim 5, wherein:

the first cold face radiator comprises an outer housing and a plurality of first radiating fins which are arranged in the outer housing at intervals, and the outer housing cover is arranged on the air outlet end of the first radiating channel and the air inlet of the internal circulating fan.

7. The sealed optical engine of claim 4, wherein:

The light source assembly comprises a light funnel and an LED light source, a light outlet of the light funnel faces the LCD screen, and the LED light source is arranged at a light inlet of the light funnel.

8. The sealed optical engine of claim 7, wherein:

The light source radiator comprises a light source cold-face radiator and a light source hot-face radiator, the light source cold-face radiator is attached to one side, opposite to the light funnel, of the LED light source, the light source hot-face radiator is connected with the light source cold-face radiator to conduct heat, and the external circulation fan cools the light source hot-face radiator and the second hot-face radiator.

9. The sealed optical engine of claim 7, wherein:

the light emitting device comprises a light funnel, and is characterized by further comprising a front Fresnel lens, heat insulation glass and a rear Fresnel lens, wherein the front Fresnel lens, the heat insulation glass, an LCD screen and the rear Fresnel lens are sequentially arranged along the light emitting direction of the light funnel.

10. The sealed optical engine of claim 5, wherein:

The outside of casing is provided with the installation cover shell, the installation cover shell is provided with the inlet end of first heat dissipation passageway and the end of giving vent to anger of second heat dissipation passageway, the second cold face radiator inlays and establishes in the installation cover shell.