1 LCD projector anti-foreign heat dissipation structure

Abstract

The application discloses a foreign matter prevention heat dissipation structure of a 1LCD projector and belongs to the technical field of projectors. The structure comprises a centrifugal fan, a wind guide cover, a radiator, a radiator cover and a flow guide ring. The air inlet of the centrifugal fan is connected with the wind guide cover. The lower side of the centrifugal fan is provided with the radiator cover. The lower side of the radiator cover is connected with the radiator. The upper side of the radiator is provided with a cylindrical groove. The flow guide ring is installed in the cylindrical groove. The hot air flow generated by the 1LCD projector enters the radiator under the action of the centrifugal fan. After heat exchange, the air flow is rotated under the action of the flow guide ring and the wind guide cover. The particulate matters in the rotating air flow collide with the surfaces of the radiator, the flow guide ring and the wind guide cover under the action of centrifugal force and are adhered to the adhesive. The clean cooling air flow without particulate matters is blown to the LCD screen by the centrifugal fan to dissipate heat. The application can realize circulating heat dissipation in the fully-closed 1LCD projector, efficiently and simply realize dust separation and reduce the influence of the tiny dust in the optical machine cavity on the projection picture.

Description

Technical Field

[0001] This invention relates to the field of projector technology, specifically a foreign object-proof heat dissipation structure for an LCD projector. Background Technology

[0002] 1. LCD projectors use fans that blow air directly onto the LCD screen for heat dissipation. This requires extremely clean airflow. To ensure cleanliness, the optical engine casing uses a fully enclosed structure, which puts pressure on the engine's heat dissipation. Furthermore, due to the production environment and the cleanliness of the materials themselves, it's impossible to guarantee a completely dust-free interior. Dust can still settle on the LCD during transportation or use, causing the projected image to appear as foreign objects. Therefore, cleaning the air through the internal airflow path of the optical engine is essential.

[0003] Patent document CN 101986202 A discloses a liquid cooling system for an LCD projector, including an optical body and a sealed body that seals the optical body and conducts heat generated by the optical body. The sealed body includes a sealed housing, a heat-conducting device, and a liquid cooling device connected to the heat-conducting device. The liquid cooling device includes a liquid cooler, a coolant pump, and cooling pipes connecting the liquid cooler and the coolant pump. This liquid cooling system for LCD projectors reduces the temperature of the optical body to the optimal operating temperature of the LCD projector through the combined heat dissipation effect of the heat-conducting device and the liquid cooling device. Furthermore, the sealed housing houses the optical body and has good sealing properties, further preventing dust and dirt from contaminating the optical body, achieving both dust prevention and temperature reduction. However, this invention cannot remove dust generated during production and transportation, and therefore cannot solve the aforementioned technical problems. Summary of the Invention

[0004] In view of this, the present invention addresses the shortcomings of the prior art by providing a foreign object-proof heat dissipation structure for a 1LCD projector, which can efficiently and easily separate dust, ensure the assembly quality of the 1LCD optical engine, and reduce the impact of tiny dust particles inside the optical engine cavity on the projected image.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a foreign object prevention and heat dissipation structure for an LCD projector. The housing of the LCD projector is a fully enclosed structure, including a centrifugal fan, an air guide shroud, a heat sink, a heat sink cover, and a flow guide ring. The air inlet of the centrifugal fan is connected to the air guide shroud. The heat sink cover is disposed on the lower side of the centrifugal fan. The heat sink cover is connected to the heat sink on the lower side. A cylindrical groove is provided on the heat sink. The flow guide ring is installed in the cylindrical groove. A circular hole is provided on the heat sink cover. The lower end of the air guide shroud enters the center of the flow guide ring through the circular hole. The surfaces of the heat sink, the flow guide ring, and the air guide shroud that come into contact with the rotating airflow are coated with adhesive. The hot airflow generated by the LCD projector enters the heat sink under the action of the centrifugal fan. After heat exchange, the airflow rotates under the action of the guide ring and the air guide shroud. The particles in the rotating airflow collide with the surface of the heat sink, the guide ring and the air guide shroud under the action of centrifugal force and adhere to the adhesive. The centrifugal fan blows clean airflow without particles onto the LCD screen for heat dissipation.

[0006] Furthermore, the inner and outer surfaces of the radiator are provided with spaced guide grooves for hot air recirculation, and the bottom of the cylindrical groove is conical, with the adhesive coating applied to the inner surface of the cone.

[0007] Furthermore, a first opening is uniformly provided on the outer surface of the guide ring along the circumferential tangent direction toward the inner surface. The cooling airflow after passing through the heat sink guide groove enters the inner surface through the first opening, and the adhesive is applied to the inner surface of the guide ring.

[0008] Furthermore, the diameter of the circular hole is smaller than the inner diameter of the guide ring and larger than the air inlet diameter of the centrifugal fan. The radiator cover is fixed to the radiator with screws, so that the guide groove forms a closed airflow passage.

[0009] Furthermore, the air guide shroud is cylindrical or conical, with an outer diameter smaller than the diameter of the circular hole and an inner diameter larger than the inlet diameter of the centrifugal fan. A second opening is uniformly arranged on the outer surface of the air guide shroud along the circumferential tangent direction towards the inner surface. The cooling airflow passing through the inner side of the guide ring enters the inner surface through the second opening, forming a rotating airflow, and finally enters the centrifugal fan. The inner and outer surfaces of the air guide shroud are coated with adhesive.

[0010] Furthermore, the upper end of the air guide shroud is bonded to the outside of the air inlet of the centrifugal fan, and a sealing gasket is fitted on the outer side of the upper part of the air guide shroud, the sealing gasket being clamped between the centrifugal fan and the radiator cover.

[0011] Furthermore, the radiator is provided with four screw fixing posts, and the radiator cover is provided with four mounting holes. The screws fix the radiator cover to the screw fixing posts of the radiator through the mounting holes.

[0012] Furthermore, an opening is provided on one side of the radiator cover, through which hot airflow enters the guide groove of the radiator.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention relates to a foreign object prevention and heat dissipation structure for 1LCD projectors. Under the action of a centrifugal fan, the cooling airflow from the hot end of the LCD enters the heat sink. After heat exchange, the airflow rotates under the action of the guide ring and the fan inlet shroud. Particulate matter within the rotating airflow collides with the surfaces of the heat sink, guide ring, and shroud under centrifugal force. By applying adhesive to the surfaces of these components involved in the airflow rotation, dust is trapped upon impact, ensuring that the cooling airflow reaching the LCD screen is clean. This invention not only achieves circulating heat dissipation within a fully enclosed 1LCD projector but also efficiently and easily separates dust, ensuring the assembly quality of the 1LCD optical engine and reducing the impact of tiny dust particles within the optical engine cavity on the projected image. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of an embodiment of the present invention; Figure 2 This is an exploded structural diagram of an embodiment of the present invention; Figure 3 This is a schematic diagram of the heat sink structure in an embodiment of the present invention; Figure 4 This is a schematic diagram of the flow guide ring in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the radiator cover in an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the air guide cover in an embodiment of the present invention.

[0015] In the diagram, 1-centrifugal fan, 2-air guide shroud, 3-heat sink, 4-heat sink cover, 5-air guide ring, 6-cylindrical groove, 7-round hole, 8-air guide groove, 9-first opening, 10-second opening, 11-sealing gasket, 14-opening. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention are within the scope of protection of the present invention.

[0017] Example: Figures 1-6As shown, the 1LCD projector has a foreign object prevention and heat dissipation structure. The 1LCD projector shell is a fully enclosed structure, including a centrifugal fan 1, an air guide shroud 2, a heat sink 3, a heat sink cover 4, and a flow guide ring 5. The air inlet of the centrifugal fan 1 is connected to the air guide shroud 2. The heat sink cover 4 is located on the lower side of the centrifugal fan 1. The heat sink 3 is connected to the lower side of the heat sink cover 4. A cylindrical groove 6 is provided on the heat sink 3. The flow guide ring 5 is installed in the cylindrical groove 6. A circular hole 7 is provided on the heat sink cover 4. The lower end of the air guide shroud 2 enters the center of the flow guide ring 5 through the circular hole 7. The surfaces of the heat sink 3, the flow guide ring 5, and the air guide shroud 2 that come into contact with the rotating airflow are coated with adhesive. The hot airflow generated by the LCD projector enters the heat sink 3 under the action of the centrifugal fan 1. After heat exchange, the airflow rotates under the action of the guide ring 5 and the air guide shroud 2. The particles in the rotating airflow collide with the surfaces of the heat sink 3, the guide ring 5 and the air guide shroud 2 under the action of centrifugal force and adhere to the adhesive. The centrifugal fan 1 blows clean cooling airflow without particles onto the LCD screen for heat dissipation.

[0018] Specifically, the heat sink 3 has spaced guide grooves 8 on both its inner and outer surfaces for hot air return, and the bottom of the cylindrical groove 6 is conical, with the adhesive coating applied to the inner surface of the conical bottom.

[0019] The outer surface of the guide ring 5 is uniformly provided with first openings 9 along the circumferential tangent direction towards the inner surface. The cooling airflow after passing through the guide groove 8 of the heat sink enters the inner surface through the first openings 9. The inner surface of the guide ring 5 is coated with the self-adhesive.

[0020] The diameter of the circular hole 7 is smaller than the inner diameter of the guide ring 5 and larger than the air inlet diameter of the centrifugal fan 1. The radiator cover 4 is fixed to the radiator 3 by screws, so that the guide groove 8 forms a closed airflow passage.

[0021] The air guide shroud 2 is conical (or cylindrical in other embodiments). The outer diameter of the top and bottom of the air guide shroud 2 is smaller than the diameter of the circular hole 7, and the inner diameter is larger than the air inlet diameter of the centrifugal fan 1. The outer surface of the air guide shroud 2 is uniformly provided with second openings 10 along the circumferential tangent direction towards the inner surface. The cooling airflow passing through the inner side of the guide ring 5 enters the inner surface of the air guide shroud 2 through the second openings 10, forming a rotating airflow, and finally enters the centrifugal fan 1. The inner and outer surfaces of the air guide shroud 2 are coated with adhesive.

[0022] The upper end of the air guide shroud 2 is bonded to the outside of the air inlet of the centrifugal fan 1. A sealing gasket 11 is fitted on the upper outer side of the air guide shroud 2, and the sealing gasket 11 is clamped and fixed between the centrifugal fan 1 and the radiator cover 4.

[0023] The radiator 3 is provided with four screw fixing posts, and the radiator cover 4 is provided with four mounting holes. The screws fix the radiator cover 4 to the screw fixing posts of the radiator through the mounting holes.

[0024] An opening 14 is provided on one side of the radiator cover 4, through which hot air enters the guide groove 8 of the radiator 3.

[0025] The foreign object-proof heat dissipation structure for a 1LCD projector in this embodiment combines an airflow swirling structure and a heat sink. This not only achieves circulating heat dissipation within the fully enclosed 1LCD projector but also efficiently and easily separates dust, ensuring the quality of the 1LCD optical engine assembly and reducing the impact of tiny dust particles inside the optical engine cavity on the projected image. The above description represents a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles described in this invention, and these improvements and modifications should also be considered within the scope of protection of this invention.

Claims

1. 1 An LCD projector with a foreign object prevention and heat dissipation structure, wherein the LCD projector casing is a fully enclosed structure, characterized in that: The device includes a centrifugal fan, an air guide shroud, a radiator, a radiator cover, and a flow guide ring. The air inlet of the centrifugal fan is connected to the air guide shroud. The radiator cover is located below the centrifugal fan, and the radiator is connected to the radiator below the radiator cover. A cylindrical groove is provided on the radiator, and the flow guide ring is installed in the cylindrical groove. A circular hole is provided on the radiator cover, and the lower end of the air guide shroud enters the center of the flow guide ring through the circular hole. Adhesive is applied to the surfaces of the radiator, the flow guide ring, and the air guide shroud that come into contact with the rotating airflow. A first opening is uniformly provided on the outer surface of the flow guide ring along the circumferential tangent direction towards the inner surface, and a second opening is uniformly provided on the outer surface of the air guide shroud along the circumferential tangent direction towards the inner surface. The hot airflow generated by the LCD projector enters the heat sink under the action of the centrifugal fan. After heat exchange, the airflow rotates under the action of the guide ring and the air guide shroud. The particles in the rotating airflow collide with the surface of the heat sink, the guide ring and the air guide shroud under the action of centrifugal force and adhere to the adhesive. The centrifugal fan blows clean airflow without particles onto the LCD screen for heat dissipation.

2. The anti-foreign-object heat dissipation structure for an LCD projector according to claim 1, characterized in that: The heat sink has spaced guide grooves on both its inner and outer surfaces for hot air return. The bottom of the cylindrical groove is conical, and the inner surface of the cone is coated with the adhesive.

3. The anti-foreign-object heat dissipation structure for an LCD projector according to claim 2, characterized in that: The cooling airflow after passing through the heat sink guide groove enters the inner surface through the first opening, and the adhesive is applied to the inner surface of the guide ring.

4. The anti-foreign-object heat dissipation structure for an LCD projector according to claim 2, characterized in that: The diameter of the circular hole is smaller than the inner diameter of the guide ring and larger than the air inlet diameter of the centrifugal fan. The radiator cover is fixed to the radiator with screws, so that the guide groove forms a closed airflow passage.

5. The anti-foreign-object heat dissipation structure for an LCD projector according to claim 4, characterized in that: The air guide shroud is cylindrical or conical. The outer diameter of the air guide shroud is smaller than the diameter of the circular hole, and the inner diameter is larger than the diameter of the air inlet of the centrifugal fan. The cooling airflow passing through the inner side of the guide ring enters the inner surface through the second opening, forming a rotating airflow, and finally enters the centrifugal fan. The inner and outer surfaces of the air guide shroud are coated with adhesive.

6. The anti-foreign-object heat dissipation structure for an LCD projector according to claim 5, characterized in that: The upper end of the air guide cover is bonded to the outside of the air inlet of the centrifugal fan, and a sealing gasket is fitted on the upper outer side of the air guide cover. The sealing gasket is clamped between the centrifugal fan and the radiator cover.

7. The anti-foreign-object heat dissipation structure for an LCD projector according to claim 4, characterized in that: The radiator is provided with four screw fixing posts, and the radiator cover is provided with four mounting holes. The screws are used to fix the radiator cover to the screw fixing posts of the radiator through the mounting holes.

8. The anti-foreign-object heat dissipation structure for an LCD projector according to claim 4, characterized in that: An opening is provided on one side of the radiator cover, through which hot air enters the guide groove of the radiator.

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