Internal circulation air duct structure

Abstract

The utility model relates to the technical field of projector heat dissipation, and discloses an internal circulation air duct structure which comprises a heat dissipation assembly and an air guide cover which are fixedly arranged on a projection machine, the projection machine further comprises an upper cover and a lower cover which are fixedly connected, the air guide cover is fixedly connected to the upper cover, the heat dissipation assembly is fixedly connected to the lower portion of the lower cover, and the air guide cover is fixedly connected to the lower portion of the upper cover. The heat dissipation assembly comprises a shell, an installation groove is formed in the shell, an air hole communicated with the installation groove is formed in the shell, a fan is fixedly arranged in the installation groove, an arc-shaped groove is formed in the position, located on one side of the installation groove, in the shell, and an air groove communicated with the arc-shaped groove is formed in the lower cover. A flow guide block is fixedly arranged on one side of the air groove. According to the internal circulation air duct structure, the vertical air duct is adopted for circular heat dissipation, hot air is guided by the arc-shaped groove to upwards penetrate through the air duct to dissipate heat of the light path assembly after being subjected to heat exchange by the mounting groove, and then is guided by the air guide cover to flow back, so that efficient and uniform heat dissipation is performed on the light path assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of projector heat dissipation, in particular to an internal circulation air duct structure. Background Art

[0002] Projection machines are devices that project images or videos onto a screen and are widely used in homes and conferences. However, the heat generated during the use of the projector will affect the quality of the projected video.

[0003] In the prior art, the name disclosed in the application number: CN202222234928.9 is: an internal circulation heat dissipation type projector, which includes a projector body, which is composed of a front projection part and a rear optical machine part, and two sets of parallel air guide ducts are arranged at the junction of the front projection part and the rear optical machine part, a front vent is opened on the left side of the front projection part, the front projection part includes a front base shell and a projection lens, and a rear vent is opened on the back of the rear optical machine part, and the rear optical machine part includes a rear base shell and a light bucket; a heat dissipation mechanism, which includes a first heat sink arranged in the inner cavity of the front projection part, a second heat sink arranged in the inner cavity of the rear optical machine part, and a third heat sink located on the outside of the rear optical machine part and arranged at the rear vent; the first heat sink cooperates with the second heat sink to realize closed internal circulation heat dissipation for the projector body, and the third heat sink is used to quickly conduct the heat in the inner cavity of the rear optical machine part to the outside to assist and accelerate the internal circulation heat dissipation rate of the projector body.

[0004] However, the internal circulation heat dissipation structure in the prior art adopts a horizontal circulation heat dissipation loop for heat dissipation. The projection light machine occupies a large area, and the heat dissipation area of ​​the heat dissipation structure is concentrated on the side of the projector. In actual use, the side and top of the projection light machine have more heat and the heat dissipation effect is poor. Therefore, it is necessary to design an infrared internal circulation air duct structure. Utility Model Content

[0005] The utility model aims to provide an internal circulation air duct structure to solve the problems in the prior art.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] An internal circulation air duct structure, the internal circulation air duct structure comprises a heat dissipation assembly and an air guide cover fixedly arranged on a projection optical machine, the projection machine further comprises an upper cover and a lower cover fixedly connected, the air guide cover is fixedly connected to the upper cover, the heat dissipation assembly is fixedly connected to the lower part of the lower cover, and the upper cover is provided with a through groove and a return air groove connected to the air guide cover;

[0008] The heat dissipation assembly includes a shell for heat dissipation, a mounting groove is provided in the shell, an air hole connected to the mounting groove is provided on the shell, a fan for driving airflow is fixedly provided in the mounting groove, an arc groove for guiding air is provided in the shell and on one side of the mounting groove, an air groove connected to the arc groove is provided on the lower cover, and a guide block for guiding air is fixedly provided on one side of the air groove.

[0009] Furthermore, an LED light source is fixedly provided at one end of the lower cover, an optical path component is fixedly provided between the upper cover and the lower cover, the through groove is located above the optical path component, and a card slot for installing an air guide cover is fixedly provided on the upper cover.

[0010] Furthermore, a light cone is fixedly provided between the optical path component and the LED light source, the optical path component comprises a rear mirror, a heat-insulating glass, an LCD screen and a front mirror arranged in sequence, and a reflective glass is fixedly provided between the upper cover and the lower cover.

[0011] Furthermore, a reflux bin is provided on the side of the optical path component away from the light cone. The reflux bin is connected to the air guide cover through a return air groove and to the mounting groove through an air hole. The two return air grooves are located on both sides of the reflective glass, and the air hole is located below the reflective glass.

[0012] Furthermore, a plurality of heat dissipation internal teeth are fixedly arranged in the arc-shaped groove, the arc-shaped groove is located below the air groove, and a fixing member for fixing the LCD screen is fixedly arranged in the air groove.

[0013] Furthermore, chamfers for guiding air are provided below the fixing member and the guide block, and a through groove is provided on the guide block.

[0014] Beneficial effects of the utility model:

[0015] 1. The internal circulation air duct structure of the utility model adopts a vertical air duct circulation heat dissipation. After the hot air is exchanged by the installation groove, it is guided upward through the arc groove to pass through the air groove to dissipate the light path component, and then guided by the air guide cover, the air flow flows through the reflective glass area and then returns to the installation groove, taking away the heat of the light path component, and dissipating the light path component efficiently from bottom to top, and the heat dissipation is uniform and reliable;

[0016] 2. The utility model has an internal circulation air duct structure. The guide block guides the air coming from the arc groove to reduce wind resistance and increase air volume. After the air flow passes through the guide block, the air outlet becomes smaller, which will increase the air flow speed when passing through the LCD screen and accelerate the heat dissipation of the LCD screen. The vertically arranged internal circulation air duct structure will reduce the floor space of the projection light machine and will not increase the use area of ​​the light machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a partial structural diagram of the projection optical machine of the utility model;

[0020] Figure 3 It is a cross-sectional view of the structure of the projection optical machine of the utility model;

[0021] Figure 4 This utility model Figure 3 The enlarged structural diagram at A in the middle;

[0022] Figure 5 This is a schematic diagram of the airflow of the internal circulation air duct structure of the utility model;

[0023] Figure 6 It is a schematic diagram of the internal structure of the projection optical machine of the utility model. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] An internal circulation air duct structure, the internal circulation air duct structure is located in the projection light machine, such as Figure 1-3 As shown, the projection optical machine includes a bottom cover 1 , on which a lower cover 12 is fixedly arranged, on which an upper cover 13 is fixedly arranged, and on the top of which an air guide cover 14 is fixedly arranged.

[0026] An LED light source 18 is fixedly provided at one end of the lower cover 12 , and a heat dissipation assembly 11 is fixedly provided at the other end. The heat dissipation assembly 11 is fixedly connected between the lower cover 12 and the bottom cover 1 , and the internal circulation air duct structure is located between the heat dissipation assembly 11 and the air guide cover 14 .

[0027] An optical path component 4 is fixedly provided between the upper cover 13 and the lower cover 12. A through groove is provided on the upper cover 13. The through groove is located above the optical path component 4 and is used to discharge hot air near the optical path component 4 into the air guide cover 14. An air return groove 15 is provided on the upper cover 13. The air return groove 15 is used to guide the gas in the air guide cover 14 to flow back into the optical machine. A card slot 16 is fixedly provided on the upper cover 13. The card slot 16 is located on one side of the air return groove 15. The edge of the air guide cover 14 is carded into the card slot 16 for fixing and connecting the air guide cover 14 and sealing the air guide cover 14 to prevent the air guide cover 14 from leaking the gas in the internal circulating air duct.

[0028] like Figure 4-6As shown, a light cone 19 is fixedly provided between the upper cover 13 and the lower cover 12, and the light cone 19 is located between the optical path component 4 and the LED light source 18. The optical path component 4 includes a rear mirror 41, an insulating glass 42, an LCD screen 43 and a front mirror 44 which are arranged in sequence, and the rear mirror 41 is located near the light cone 19. A reflective glass 21 is fixedly provided between the upper cover 13 and the lower cover 12, and the front mirror 44 is located near the reflective glass 21.

[0029] The two air return grooves 15 are located on both sides of the reflective glass 21 . After the air passes downward from the air guide cover 14 through the air return grooves 15 , the air is heat exchanged and dissipated on both sides of the reflective glass 21 .

[0030] A reflux bin 2 is provided on the side of the optical path component 4 away from the light cone 19. The connection between the wind guide cover 14 and the reflux bin 2 is a smoothly transitioned plane, which helps to reduce wind resistance. The reflective glass 21 is fixed in the reflux bin 2. The heat dissipation component 11 includes an outer shell 3. The outer shell 3 is made of aluminum alloy heat dissipation material and is used for heat exchange with the outside world. A mounting groove 31 is provided in the outer shell 3. An air hole 35 is opened on the outer shell 3. The air hole 35 is connected to the mounting groove 31. A fan 32 is fixedly installed in the mounting groove 31. An arc groove 33 is opened in the outer shell 3 and on one side of the mounting groove 31. The arc groove 33 is located on the exhaust side of the fan 32 and is used to guide the exhaust of the fan 32.

[0031] When the fan 32 is started, air will be sucked from the air hole 35, and the hot air in the reflux bin 2 will be sucked into the mounting groove 31 of the outer shell 3. The hot air flows in the outer shell 3, and the heat in the hot air exchanges heat with the outer shell 3 made of aluminum alloy. The heat is released to the outer shell 3, and then the gas is discharged into the arc groove 33.

[0032] A plurality of heat dissipation internal teeth 34 are fixedly provided in the arc groove 33, which are used for heat exchange of the gas discharged into the arc groove 33 by the fan 32, so as to reduce the gas temperature and improve the heat dissipation effect. The upper part of the arc groove 33 abuts against the lower cover 12, and the upper part of the arc groove 33 is directly opposite to the optical path component 4. An air groove 22 is provided on the lower cover 12, and a fixing part 25 is fixed in the air groove 22. The fixing part 25 abuts against the lower end of the LCD screen 43 to support and fix the LCD screen 43. A chamfer is provided at the bottom of the fixing part 25 to reduce wind resistance.

[0033] In this embodiment, the number of the heat dissipation internal teeth 34 is ten.

[0034] A guide block 24 is fixedly provided on one side of the air groove 22, and a reinforcement block 26 is fixedly provided on the other side. The reinforcement block 26 abuts against the top of the fan 32 to fix the fan 32. The top of the guide block 24 abuts against the insulating glass 42, and a chamfer is also provided at the bottom of the guide block 24 to guide the cool air discharged upward from the arc groove 33, thereby reducing wind resistance and allowing a large amount of cool air to flow through the back side of the LCD screen 43 to dissipate heat from the LCD screen 43.

[0035] The guide block 24 seals the gap between the insulating glass 42 and the rear mirror 41, and the gas flows through the smaller gap between the LCD screen 43 and the insulating glass 42. The air inlet area becomes smaller, and the wind speed flowing through the back side of the LCD screen 43 becomes larger, which has a better heat dissipation effect. A through groove 27 is opened on the guide block 24, and a small amount of cool air is introduced into the insulating glass 42 and the rear mirror 41 through the through groove 27, so that more cool air can dissipate heat for the LCD screen 43.

[0036] The cool air will also pass through the air groove 22 and flow through the front side of the LCD screen 43 to dissipate heat on both sides of the LCD screen 43, thereby taking away more heat from the LCD screen 43 and ensuring perfect heat dissipation of the LCD screen 43.

[0037] The working principle of this embodiment is as follows:

[0038] The gas is driven by the fan 32, passes through the arc groove 33 in sequence for heat exchange, passes through the air groove 22 upward into the optical path component 4, passes through the gaps between the screens of the optical path component 4 to mainly dissipate heat to the LCD screen 43, and then passes through the through groove to enter the air guide cover 14, passes through the return air groove 15 from the air guide cover 14 to dissipate heat to the reflective glass 21 in the reflux bin 2, and finally the gas that has absorbed the heat returns to the installation groove 31 from the air hole 35 to dissipate heat, thereby ensuring the normal operation of each component inside the optical machine and stable heat dissipation of each component.

[0039] The gas dissipates heat from the LCD screen 43 efficiently and quickly, will not affect the projection brightness of the projection light machine, will not affect the viewing experience, and effectively improves the circulation heat dissipation inside the light machine. In actual use, the internal temperature of the light machine can be reduced by 8-10 degrees.

[0040] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. An internal circulation air duct structure, characterized in that: The internal circulation air duct structure comprises a heat dissipation component (11) and an air guide cover (14) fixedly arranged on the projection optical machine, and the projection machine further comprises an upper cover (13) and a lower cover (12) fixedly connected, the air guide cover (14) being fixedly connected to the upper cover (13), the heat dissipation component (11) being fixedly connected to the lower part of the lower cover (12), and the upper cover (13) being provided with a through groove and an air return groove (15) which are connected to the air guide cover (14); The heat dissipation assembly (11) comprises a shell (3) for heat dissipation, a mounting groove (31) is provided in the shell (3), an air hole (35) connected to the mounting groove (31) is provided on the shell (3), a fan (32) for driving airflow is fixedly provided in the mounting groove (31), an arc-shaped groove (33) for guiding air is provided in the shell (3) and on one side of the mounting groove (31), an air groove (22) connected to the arc-shaped groove (33) is provided on the lower cover (12), and a guide block (24) for guiding air is fixedly provided on one side of the air groove (22).

2. The internal circulation air duct structure according to claim 1, characterized in that: An LED light source (18) is fixedly provided at one end of the lower cover (12), an optical path component (4) is fixedly provided between the upper cover (13) and the lower cover (12), the through slot is located above the optical path component (4), and a card slot (16) for mounting an air guide cover (14) is fixedly provided on the upper cover (13).

3. The internal circulation air duct structure according to claim 2, characterized in that: A light cone (19) is fixedly arranged between the optical path component (4) and the LED light source (18); the optical path component (4) comprises a rear mirror (41), a heat-insulating glass (42), an LCD screen (43) and a front mirror (44) which are arranged in sequence; and a reflective glass (21) is fixedly arranged between the upper cover (13) and the lower cover (12).

4. The internal circulation air duct structure according to claim 3, characterized in that: A reflow bin (2) is provided on the side of the optical path component (4) away from the light cone (19); the reflow bin (2) is connected to the air guide cover (14) via a reflow groove (15) and is connected to the mounting groove (31) via an air hole (35); the two reflow grooves (15) are located on both sides of the reflective glass (21), and the air hole (35) is located below the reflective glass (21).

5. The internal circulation air duct structure according to claim 1, characterized in that: A plurality of heat dissipation internal teeth (34) are fixedly arranged in the arc-shaped groove (33); the arc-shaped groove (33) is located below the air groove (22); and a fixing member (25) for fixing the LCD screen (43) is fixedly arranged in the air groove (22).

6. The internal circulation air duct structure according to claim 5, characterized in that: The fixing member (25) and the guide block (24) are both provided with chamfers for guiding air below, and the guide block (24) is provided with a through slot (27).

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