Heat dissipation air duct structure of projection ray machine

Abstract

The utility model relates to the field of projector heat dissipation, and discloses a heat dissipation air duct structure of a projector, which comprises a middle cover, a top cover fixed on the middle cover, a cover plate fixed on the top cover, heat dissipation side grooves symmetrically arranged in the middle cover, a top air duct arranged between the cover plate and the top cover, and an air inlet groove and an air outlet groove arranged on the top cover. Heat insulation glass, an LCD display screen, a front Fresnel lens and a reflective mirror are sequentially fixed in the middle cover, two heat dissipation side grooves are formed in the two sides of the heat insulation glass, the LCD display screen and the front Fresnel lens, an air blower fan is fixed to the position, below the reflective mirror, in the middle cover, symmetrically-distributed connecting blocks are fixed to the top of the LCD display screen, the connecting blocks are connected with the top cover, and an open groove is formed between the two connecting blocks. According to the heat dissipation air duct structure, the inner air duct, the outer air duct and the inner heat dissipation air duct are designed to dissipate heat of the interior of the projection ray machine, work of internal components of the projection ray machine is not affected, the axial fan drives air in the outer air duct, heat of the bottom cover, the bidirectional radiator and the light source radiator is dissipated at the same time, and the heat dissipation efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of projector heat dissipation, and specifically relates to a heat dissipation air duct structure of a projection optical engine. Background Art

[0002] A projection optical engine projects an image onto a corresponding projection screen for use in meetings, teaching and other occasions. As the usage time of the projection optical engine increases, a large amount of heat will be generated.

[0003] In the prior art, as disclosed in the application number: CN202221877168.7 with the name: A heat dissipation structure and a projection optical engine heat dissipation system, the heat dissipation structure includes a fitting, a heat dissipation member spaced from the fitting, and a heat conducting member connected between the fitting and the heat dissipation member. It also includes a fixed support member, and the fitting and the heat dissipation member are respectively fixed on the fixed support member.

[0004] However, the heat conducting member mentioned in the prior art only dissipates heat from some structures. Inside a small-sized projection optical engine, it is impossible to efficiently dissipate heat inside the projection optical engine. Moreover, during the heat dissipation process of the projection optical engine, the heat dissipation degree inside the projection optical engine is relatively low, affecting the projection effect of the projection optical engine. Therefore, a heat dissipation air duct structure for a projection optical engine is needed. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a heat dissipation air duct structure for a projection optical engine to solve the problems in the prior art.

[0006] The purpose of the utility model can be realized by the following technical solutions:

[0007] A heat dissipation air duct structure for a projection optical engine includes a middle cover, a top cover is fixed on the middle cover, a cover plate for sealing is fixed on the top cover. Symmetric heat dissipation side grooves are arranged inside the middle cover. A top air duct is arranged between the cover plate and the top cover. An air inlet groove and an air outlet groove are arranged on the top cover.

[0008] An insulating glass, an LCD display screen, a front Fresnel lens and a reflector are sequentially fixed inside the middle cover. The two heat dissipation side grooves are located on both sides of the insulating glass, the LCD display screen and the front Fresnel lens. A blower fan is fixed inside the middle cover and below the reflector. Symmetrically distributed connecting blocks are fixed on the top of the LCD display screen. The connecting blocks are connected to the top cover, and an opening groove for assisting heat dissipation is arranged between the two connecting blocks.

[0009] A partition is fixed inside the middle cover to form the middle cover into an upper and a lower cavity structure. The partition is arranged between the reflector and the blower fan.

[0010] Further, a lens module is fixed to one side of the middle cover, a reflector cup bracket is fixed to one end of the middle cover, a reflector cup is fixed inside the reflector cup bracket, an LED light source is fixed to one end of the reflector cup, a rear Fresnel lens is fixed to the other end, and an air outlet groove is located above the reflector.

[0011] Further, a bottom cover is fixed below the middle cover. The bottom cover is located below the blower fan. A two-way radiator is fixed to one side of the bottom cover. The two-way radiator is located below the heat-insulating glass and the LCD display screen.

[0012] Further, a fan bracket is fixed below the reflector cup bracket. One end of the fan bracket is fixed below the two-way radiator, and the other end is fixed with a light source radiator.

[0013] Further, an axial flow fan is fixed between the fan bracket and the reflector cup bracket. The axial flow fan is used to simultaneously dissipate heat from the light source radiator, the bottom cover, and the two-way radiator.

[0014] Further, the light source radiator is fixed to the LED light source. The light source radiator is used to dissipate heat from the LED light source.

[0015] Advantages of the present utility model:

[0016] 1. The heat dissipation air duct structure of the present utility model, through the design of two internal and external air ducts, the internal heat dissipation air duct dissipates heat from the inside of the projection optical machine, and will not affect the operation of the internal components of the projection optical machine. At the same time, the opening grooves, heat dissipation side grooves, and top air ducts inside the projection optical machine efficiently dissipate heat from the internal screen, and the two-way radiator dissipates heat from both the inside and the outside simultaneously;

[0017] 2. The heat dissipation air duct structure of the present utility model, the axial flow fan drives the air inside the external air duct to simultaneously dissipate heat from the bottom cover, the two-way radiator, and the light source radiator, effectively dissipating heat from the outside of the projection optical machine. By simultaneously dissipating heat from the inside and the outside, the projection optical machine is simultaneously cooled, and the heat dissipation efficiency is high. Description of the drawings

[0018] The following further describes the present utility model with reference to the accompanying drawings.

[0019] Figure 1 is an exploded structural schematic diagram of the projection optical machine of the present utility model;

[0020] Figure 2 is a partial structural schematic diagram of the projection optical machine of the present utility model;

[0021] Figure 3 is the present utility model Figure 2 magnified structural schematic diagram at A;

[0022] Figure 4 is a cross-sectional view of the projection optical machine of the present utility model. Specific embodiments

[0023] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts belong to the scope of protection of the present utility model.

[0024] A heat dissipation air duct structure of a projection optical machine, as Figures 1-4 shown, the projection optical machine includes a middle cover 1, a lens module 2 is installed on one side of the middle cover 1, a reflector cup bracket 6 is fixedly provided at one end of the middle cover 1, a reflector cup 18 is fixedly provided in the reflector cup bracket 6, an LED light source 15 is fixedly provided at one end of the reflector cup 18, and a rear Fresnel lens 14 is fixedly provided at the other end.

[0025] Symmetrically distributed heat dissipation side grooves are provided in the middle cover 1, a top cover 7 is fixedly installed on the middle cover 1, a cover plate 8 is fixedly installed on the top cover 7, a top air duct is provided between the cover plate 8 and the top cover 7, and the hot air entering from the air inlet groove 71 is led out from the air outlet groove 72 through the top air duct. Both the air inlet groove 71 and the air outlet groove 72 are communicated with the middle cover 1.

[0026] An insulating glass 9, an LCD display screen 10, a front Fresnel lens 11 and a reflector 12 are sequentially fixed inside the middle cover 1 and on one side of the rear Fresnel lens 14. The reflector 12 reflects the incident light passing through the front Fresnel lens 11 onto the lens module 2. The two heat dissipation side grooves are located on both sides of the insulating glass 9, the LCD display screen 10, and the front Fresnel lens 11. A blower fan 13 is fixedly provided inside the middle cover 1 and below the reflector 12, and the air outlet groove 72 is located above the reflector 12.

[0027] A partition is fixedly provided inside the middle cover 1, and the partition is located between the blower fan 13 and the reflector 12, dividing the inside of the middle cover 1 into two cavities, and the two cavities are respectively located on both sides of the partition.

[0028] A bottom cover 3 is fixedly provided below the middle cover 1. The bottom cover 3 is located below the blower fan 13. And a two-way radiator 4 is fixedly provided on one side of the bottom cover 3. The two-way radiator 4 is located at the air outlet of the blower fan 13, and is located below the heat-insulating glass 9 and the LCD display screen 10. The blower fan 13 absorbs the hot air on both sides of the rearview mirror 12 and discharges it to the two-way radiator 4. The heat in the inhaled gas is dissipated through the two-way radiator 4 to achieve internal heat dissipation. Then the gas passes through the slots at the bottom of the middle cover 1 and enters between the heat-insulating glass 9, the LCD display screen 10, and the front Fresnel lens 11 to dissipate heat from the heat-insulating glass 9, the LCD display screen 10, and the front Fresnel lens 11. Then the wind enters the top air duct through the air inlet slot 71 and can also be discharged to both sides of the middle cover 1 through the heat dissipation side slots to accelerate heat dissipation.

[0029] Symmetrically distributed connecting blocks 102 are fixedly provided at the top of the LCD display screen 10. The connecting blocks 102 are connected to the top cover 7. An opening slot 101 is formed between the two connecting blocks 102. The opening slot 101 is used for auxiliary heat dissipation of the heat between the LCD display screen 10 and the heat-insulating glass 9. When the heat cannot be discharged from the heat dissipation side slots and the air inlet slot 71, it can be discharged from the opening slot 101 for auxiliary heat dissipation. Then, the air volume between the LCD display screen 10 and the front Fresnel lens 11 is increased, which can also accelerate the heat dissipation efficiency between the LCD display screen 10 and the front Fresnel lens 11.

[0030] A fan bracket 5 is fixedly provided below the reflector cup bracket 6. One end of the fan bracket 5 is fixed below the two-way radiator 4, and a light source radiator 17 is fixedly provided at the other end. An axial flow fan 16 is fixedly provided between the fan bracket 5 and the reflector cup bracket 6. The axial flow fan 16 sucks away the air in the air duct below the bottom cover 3. The air passes through the two-way radiator 4 and then is discharged from the light source radiator 17 through the axial flow fan 16 to dissipate heat from the light source radiator 17, the bottom cover 3, and the two-way radiator 4 simultaneously, forming an external heat dissipation structure below the middle cover 1.

[0031] In this embodiment, the light source radiator 17 is fixedly connected to the LED light source 15 for dissipating heat from the LED light source 15.

[0032] The working principle is as follows:

[0033] During the actual working process of the projection optical machine, the heat-insulating glass 9, the LCD display screen 10, the front Fresnel lens 11, and the rearview mirror 12 will all generate heat. The internal heat of the optical machine is dissipated through the heat dissipation side slots, the top air duct, and the opening slot 101 to synchronously dissipate heat from the heat-insulating glass 9, the LCD display screen 10, the front Fresnel lens 11, and the rearview mirror 12. The opening slot 101 assists in heat dissipation between the heat-insulating glass 9 and the LCD display screen 10. At the same time, increasing the air volume between the LCD display screen 10 and the front Fresnel lens 11 can also accelerate the heat dissipation efficiency between the LCD display screen 10 and the front Fresnel lens 11.

[0034] The structure is simple, the internal heat dissipation is stable and reliable, and the external heat dissipation is driven by the axial flow fan 16 to extract the heat dissipation air, and drive the bottom cover 3 and the two-way radiator 4 to dissipate heat. During the process of the axial flow fan 16 exhausting air, the light source radiator 17 can be dissipated heat, assisting the heat dissipation of the LED light source 15.

[0035] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and the above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A heat dissipation duct structure of a projection optical machine, comprising a middle cover (1), characterized in that: The middle cover (1) is fixed with a top cover (7), a cover plate (8) for sealing is fixed with the top cover (7), heat dissipation side grooves are symmetrically arranged in the middle cover (1), a top air duct is arranged between the cover plate (8) and the top cover (7), and an air inlet groove (71) and an air outlet groove (72) are arranged on the top cover (7); The middle cover (1) is fixed with a heat-insulating glass (9), an LCD display screen (10), a front mirror (11) and a reflector (12) in sequence; two heat-dissipating side grooves are located on both sides of the heat-insulating glass (9), the LCD display screen (10) and the front mirror (11); a blower fan (13) is fixed in the middle cover (1) and below the reflector (12); symmetrically distributed connecting blocks (102) are fixed on the top of the LCD display screen (10); the connecting blocks (102) are connected to the top cover (7); and an open groove (101) for auxiliary heat dissipation is provided between the two connecting blocks (102); A partition is fixedly provided inside the middle cover (1) for forming the middle cover (1) into two upper and lower cavity structures, and the partition is arranged between the reflector (12) and the blower fan (13).

2. The heat dissipation duct structure of a projection optical machine according to claim 1, characterized in that: A lens module (2) is fixed to one side of the middle cover (1), a reflector bracket (6) is fixed to one end of the middle cover (1), a reflector (18) is fixed inside the reflector bracket (6), an LED light source (15) is fixed to one end of the reflector (18), a rear mirror (14) is fixed to the other end, and an air outlet slot (72) is located above the reflector (12).

3. The heat dissipation duct structure of a projection optical machine according to claim 2, characterized in that: A bottom cover (3) is fixed below the middle cover (1), the bottom cover (3) is located below the blower fan (13), a two-way radiator (4) is fixed on one side of the bottom cover (3), and the two-way radiator (4) is located below the heat-insulating glass (9) and the LCD display screen (10).

4. The heat dissipation duct structure of a projection optical machine according to claim 2, characterized in that: A fan bracket (5) is fixed below the reflective cup bracket (6); one end of the fan bracket (5) is fixed below the bidirectional radiator (4), and the other end is fixed to a light source radiator (17).

5. The heat dissipation duct structure of a projection optical machine according to claim 4, characterized in that: An axial flow fan (16) is fixed between the fan bracket (5) and the reflector cup bracket (6), and the axial flow fan (16) is used to dissipate heat from the light source radiator (17), the bottom cover (3) and the bidirectional radiator (4) simultaneously.

6. The heat dissipation duct structure of a projection optical machine according to claim 4, characterized in that: The light source heat sink (17) is fixed on the LED light source (15), and the light source heat sink (17) is used to dissipate heat from the LED light source (15).

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