LCD projection liquid crystal screen heat dissipation device

Abstract

The application provides a LCD projection liquid crystal screen heat dissipation device, comprising: a shell, a screen display assembly, a fan and a phase change cooling cavity. A closed loop heat dissipation air duct is formed in the shell. The screen display assembly is located in the heat dissipation air duct and the shell. The fan is located in the heat dissipation air duct and is used to drive the gas in the heat dissipation air duct to circulate along the closed loop path. The phase change cooling cavity is arranged in the shell and communicates with the heat dissipation air duct, and the phase change cooling cavity contains phase change liquid. The phase change cooling cavity further comprises a refrigeration part. Wherein, the phase change liquid absorbs heat to form cooling gas after vaporization, and sequentially flows through the fan, the screen display assembly in the heat dissipation air duct and the phase change cooling cavity. Through the above structure, efficient heat dissipation of the projector is realized.

Description

Technical Field

[0001] This application relates to the field of projection heat dissipation, and more particularly to a heat dissipation device for LCD projection screens. Background Technology

[0002] With the continuous development of LCD projection technology, consumers have increasingly higher performance requirements for projectors. Current LCD projectors not only provide clear image display but are also widely used in home theaters, business meetings, and educational training. To improve projection quality and extend device lifespan, the heat dissipation system has become an indispensable and crucial part of LCD projector design.

[0003] However, LCD projectors generate a significant amount of heat during operation, especially when the screen and light source temperatures are too high, which can lead to performance degradation, color distortion, or screen aging. Existing heat dissipation technologies mainly include air cooling, liquid cooling, and a combination of both. Air cooling efficiency is affected by ambient temperature and airflow, making it ineffective at high brightness and temperature, easily leading to screen burn-in or yellowing. The combination of air and liquid cooling only slightly improves air cooling efficiency. While liquid cooling significantly reduces the temperature within the screen's cooling ducts and improves light source heat dissipation, it doesn't fundamentally solve the screen's heat dissipation problem; burn-in and yellowing due to screen aging still occur.

[0004] Liquid cooling solutions suffer from reduced light efficiency due to the absorption of light by the coolant, and are also expensive, presenting engineering challenges such as sealing leaks, cleaning and filtration, and fluid design.

[0005] Therefore, a heat dissipation device for LCD projection screens with high efficiency is needed. Utility Model Content

[0006] In view of this, it is necessary to provide a heat dissipation device for LCD projection screens with high efficiency in heat dissipation to solve the above problems.

[0007] Embodiments of this application provide a heat dissipation device for an LCD projection screen, comprising: The housing has a closed-loop heat dissipation air duct inside; The screen display component is located within the heat dissipation duct and the housing. A fan, located inside the heat dissipation duct, is used to drive the gas inside the heat dissipation duct to circulate along the closed-loop path; A phase change cooling chamber is disposed within the housing and communicates with the heat dissipation duct. The phase change cooling chamber contains a phase change liquid and also includes a refrigeration component. The phase change liquid absorbs heat and vaporizes to form a cooling gas, which flows sequentially through the fan, the screen display component in the heat dissipation duct, and the phase change cooling chamber.

[0008] In at least one embodiment of this application, the phase change cooling cavity and the screen display assembly are arranged opposite each other along the closed-loop path of the heat dissipation duct.

[0009] In at least one embodiment of this application, the phase change cooling cavity includes: The first heat dissipation component is fitted and connected to the housing and is located outside the phase change cooling cavity; The second heat sink is located inside the phase change cooling chamber, and a portion of the second heat sink is immersed in the phase change liquid. In at least one embodiment of this application, the cooling component is connected to the housing and is respectively bonded to the first heat sink and the phase change cooling chamber, with the cooling component located between the first heat sink and the phase change cooling chamber.

[0010] In at least one embodiment of this application, the cooling component includes a cold surface and a hot surface disposed opposite to each other, the cold surface being in contact with the outer wall of the phase change cooling cavity, and the hot surface being in contact with the first heat dissipation component.

[0011] In at least one embodiment of this application, the first heat sink and the second heat sink are heat dissipation fins.

[0012] In at least one embodiment of this application, the screen display component includes: An LCD screen is installed inside the heat dissipation duct; Heat-insulating glass is installed in front of the LCD screen; An imaging lens is mounted behind the LCD screen; The heat dissipation duct has a turbulence slope, which is close to the screen display component and is located on both sides of the gap between the LCD screen and the heat dissipation duct.

[0013] In at least one embodiment of this application, the phase change liquid is perfluoropentane.

[0014] In at least one embodiment of this application, the fan is configured as an air pump.

[0015] In at least one embodiment of this application, the fan is configured as a turbine fan.

[0016] The aforementioned LCD projection screen heat dissipation device uses a phase change cooling chamber connected to a heat dissipation duct to contain a phase change liquid. By utilizing the heat absorption during vaporization and the heat release during condensation of the phase change liquid, the temperature of the circulating air is rapidly reduced. Furthermore, the heat conduction is enhanced through a cooling component, ensuring the stable operation of the screen display components over a long period of time and avoiding screen burn-in and color distortion problems caused by overheating or drastic temperature fluctuations. Attached Figure Description

[0017] Figure 1This is a perspective view of the LCD projection screen heat dissipation device described in this application; Figure 2 This is a front view of the LCD projection screen heat dissipation device described in this application; Figure 3 for Figure 2 A cross-sectional view of AA and a schematic diagram of the heat dissipation path of the LCD projection screen heat dissipation device. Figure 4 This is a top view of the LCD projection screen heat dissipation device described in this application; Figure 5 for Figure 4 Sectional view of BB; Figure 6 for Figure 5 A magnified view of a section at point C.

[0018] Explanation of main component symbols 100. LCD projection screen heat dissipation device; 10. Housing; 11. Heat dissipation duct; 20. Screen display assembly; 30. Fan; 40. Phase change cooling chamber; 41. Phase change fluid; 42. Refrigeration component; 421. Cold surface; 422. Hot surface; 43. First heat dissipation component; 44. Second heat dissipation component; 21. LCD screen; 12. Turbulent slope. Detailed Implementation

[0019] The embodiments of this application will now be described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0020] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or may also have an intervening component. When a component is considered to be "placed" on another component, it can be directly placed on the other component or may also have an intervening component. The terms "top," "bottom," "upper," "lower," "left," "right," "front," "back," and similar expressions used in this article are for illustrative purposes only.

[0021] This application provides an LCD projection screen heat dissipation device, including: a housing, a screen display component, a fan, and a phase change cooling chamber. A closed-loop heat dissipation duct is formed within the housing. The screen display component is located within the heat dissipation duct and the housing. The fan is located within the heat dissipation duct and drives the gas within the duct to circulate along the closed-loop path. The phase change cooling chamber is located within the housing and communicates with the heat dissipation duct, and contains a phase change liquid. The phase change liquid absorbs heat and vaporizes to form cooling gas, which flows sequentially through the fan, the screen display component within the heat dissipation duct, and the phase change cooling chamber.

[0022] The aforementioned LCD projection screen heat dissipation device uses a phase change cooling chamber connected to a heat dissipation duct to contain a phase change liquid. The phase change liquid absorbs heat during its vaporization process and quickly removes heat. Heat conduction is enhanced through a cooling component, ensuring stable operation of the screen display components over a long period of time and avoiding screen burn-in and color distortion problems caused by overheating.

[0023] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0024] Please see Figures 1-6 This application provides an LCD projection screen heat dissipation device 100, including: a housing 10, a screen display assembly 20, a fan 30, and a phase change cooling chamber 40. A closed-loop heat dissipation duct 11 is formed within the housing 10. The screen display assembly 20 is located within the heat dissipation duct 11 and within the housing 10. The fan 30 is located within the heat dissipation duct 11 and drives the gas within the heat dissipation duct 11 to circulate along the closed-loop path. The phase change cooling chamber 40 is disposed within the housing 10 and communicates with the heat dissipation duct 11, and contains a phase change liquid 41. The phase change liquid 41 absorbs heat and vaporizes to form a cooling gas, which flows sequentially through the fan 30, the screen display assembly 20 within the heat dissipation duct 11, and the phase change cooling chamber 40.

[0025] Specifically, the LCD projection screen heat dissipation device 100 includes several components such as a housing 10, a heat dissipation duct 11, a screen display component 20, a fan 30, and a phase change cooling chamber 40. Among these components, the housing 10 is the external frame of the entire device, and a closed-loop heat dissipation duct 11 is provided inside. The function of this heat dissipation duct 11 is to provide an air circulation channel to help dissipate heat and cool down. Furthermore, the screen display component 20 is located within the heat dissipation duct 11 and within the housing 10; that is, the screen display component 20 is designed to be installed within the housing 10, and at the same time, it is also directly within the heat dissipation duct 11, enabling effective contact with airflow to achieve the purpose of heat transfer.

[0026] Furthermore, a fan 30 is installed within the heat dissipation duct 11. The function of the fan 30 is to drive the air within the heat dissipation duct 11 to circulate along a closed-loop path. Through the movement of airflow, the fan 30 enhances the cooling effect of the air on the heat dissipation components, ensuring maximum heat dissipation efficiency.

[0027] Furthermore, a phase change cooling chamber 40 is provided inside the device, and this phase change cooling chamber 40 is interconnected with the heat dissipation duct 11. The phase change cooling chamber 40 contains a phase change liquid 41, which absorbs heat and converts into gas, thus playing a role in temperature control. This phase change cooling chamber 40 also includes a cooling element 42, whose function is to accelerate the heat conduction process and enhance the heat dissipation effect by regulating the temperature. After the phase change liquid 41 absorbs heat and vaporizes in the phase change cooling chamber 40, it forms a low-temperature gas (the temperature is close to that of the liquid phase change liquid 41) which flows out of the phase change cooling chamber 40. The gas flows into the screen display component 20 through the fan 30. The screen display component 20 is irradiated by strong light, generating a large amount of heat. The low-temperature gas flowing out of the phase change cooling chamber 40 absorbs a large amount of heat on the surface of the screen display component 20 and becomes a high-temperature gas that flows out of the screen display component 20. It then flows back into the phase change cooling chamber 40 through the heat dissipation duct 11. The hot air encounters the first heat dissipation component 43 and the second heat dissipation component 44 in the low-temperature phase change cooling chamber 40 and is condensed and releases heat. The heat in the phase change cooling chamber 40 is transported by the cooling component 42 to the outside of the phase change cooling chamber 40, thus completing the heat transfer and heat dissipation.

[0028] In summary, after the phase change liquid 41 absorbs heat and vaporizes in the phase change cooling chamber 40, the low-temperature gas flows sequentially through the cooling component 42, the fan 30, the display assembly 20, and the heat dissipation duct 11, ultimately completing the heat transfer and dissipation. The design of the fan 30 and the heat dissipation duct 11 ensures that the airflow circulates throughout the entire system, enhancing the efficiency of the entire heat dissipation process.

[0029] In one specific embodiment, the phase change cooling cavity 40 and the screen display assembly 20 are arranged opposite each other along the closed-loop path of the heat dissipation duct 11.

[0030] Specifically, the phase change cooling cavity 40 and the display assembly 20 are arranged opposite each other along the closed-loop path of the heat dissipation duct 11. This means that the phase change cooling cavity 40 and the display assembly 20 are in different relative positions within the heat dissipation duct 11. Through this arrangement, the phase change cooling cavity 40 and the display assembly 20 can cooperate more efficiently during heat exchange, forming an effective heat dissipation channel.

[0031] Furthermore, the heat dissipation duct 11 provides a channel for gas flow, ensuring that airflow can flow between the phase change cooling chamber 40 and the display assembly 20. Due to their relative arrangement, heat can be transferred from the display assembly 20 to the phase change cooling chamber 40 and effectively exchanged through the airflow.

[0032] Furthermore, the phase change liquid 41 in the phase change cooling chamber 40 vaporizes after absorbing heat, forming a low-temperature cooling gas. This gas flows through the heat dissipation duct 11 and, driven by the fan 30, forms a continuous airflow circulation along a closed-loop path. Due to the relative arrangement of the phase change cooling chamber 40 and the display assembly 20, the airflow can flow smoothly, carrying away the heat generated by the display assembly 20 and transferring it to the cooling chamber.

[0033] Furthermore, this relative arrangement improves the heat exchange efficiency of the phase change cooling chamber 40. The gas flow path forms an effective closed-loop circulation, allowing the heat dissipation duct 11 to continuously remove heat from the display component 20, ensuring that the temperature of the display component 20 remains within a safe range during operation.

[0034] In one specific embodiment, the phase change cooling chamber 40 includes a first heat sink 43 and a second heat sink 44. The first heat sink 43 is fitted and connected to the housing 10 and is located outside the phase change cooling chamber 40, used to conduct heat from inside the phase change cooling chamber 40 to the outside of the housing 10. The second heat sink 44 is connected to the phase change cooling chamber 40 and fills the internal space of the phase change cooling chamber 40. The lower part of the second heat sink 44 is immersed in the phase change liquid 41, and the upper part is located in the gas space inside the phase change cooling chamber 40, realizing an arrangement of "partially immersed in phase change liquid and partially in gas environment".

[0035] Specifically, the function of the first heat sink 43 is to help conduct the heat absorbed in the phase change cooling chamber 40 to the outside of the housing 10. Since the first heat sink 43 is in close contact with the housing 10, it can effectively dissipate heat to the outside, promote heat exchange with the external environment, and thus improve heat dissipation efficiency.

[0036] Furthermore, the second heat sink 44 is connected to the phase change cooling chamber 40, and the second heat sink 44 fills the phase change cooling chamber 40 and is immersed in the phase change liquid 41. The second heat sink 44 is directly immersed in the phase change liquid 41, so it can quickly transfer the heat released by the condensation of the return hot air to the phase change liquid 41 through direct contact with the phase change liquid 41, and then transfer the heat to the outside of the phase change cooling chamber 40 through the first heat sink 43.

[0037] The heat released by the condensation of the second heat sink 44 is quickly transferred to the phase change liquid 41, thereby rapidly cooling the temperature of the circulating gas.

[0038] Furthermore, the relative arrangement of the first heat sink 43 and the second heat sink 44 forms a layered heat dissipation mechanism. Specifically, the first heat sink 43, through its close contact with the housing 10, assists in transferring heat from the outside of the phase change cooling chamber 40, while the second heat sink 44, through its contact with the phase change fluid 41, helps transfer heat from the air to the phase change fluid 41. This combined effect ensures efficient heat exchange between the internal and external environments.

[0039] Furthermore, the thermal conductivity between the first heat sink 43 and the second heat sink 44 ensures efficient heat exchange inside and outside the phase change cooling chamber 40. The second heat sink 44 is in direct contact with and immersed in the phase change liquid 41, enhancing the heat dissipation effect, while the first heat sink 43 further promotes heat release through contact with the housing 10, preventing the system from overheating.

[0040] In one specific embodiment, the cooling component 42 is connected to the housing 10, and the cooling component 42 is respectively attached to the first heat sink 43 and the phase change cooling cavity 40, and the cooling component 42 is located between the first heat sink 43 and the phase change cooling cavity 40.

[0041] Specifically, the cooling component 42 is located between the first heat sink 43 and the phase change cooling chamber 40. The arrangement of the cooling component 42 ensures that it plays a crucial cooling role in the system.

[0042] Furthermore, the cooling component 42 absorbs heat through contact with the first heat sink 43 and transfers the heat away through its connection with the phase change cooling chamber 40. Since the cooling component 42 is located between these two components, it not only acts as a bridge in the heat transfer process but also effectively improves the heat dissipation effect. The cooling effect of the cooling component 42 ensures that heat can be quickly conducted from the inside to the outside, avoiding overheating problems.

[0043] Furthermore, the design of the cooling component 42 enables it to form an efficient heat exchange path with the first heat sink 43 and the phase change cooling cavity 40. Through this arrangement, the cooling component 42 absorbs heat from the phase change cooling cavity 40 side during operation and conducts the absorbed heat to the first heat sink 43, which is thermally connected to it. The first heat sink 43 then dissipates the heat to the external environment of the housing 10. The cooling component 42 has unidirectional heat transfer characteristics, allowing heat only to be transferred from the phase change cooling cavity 40 to the first heat sink 43. Heat from the external environment cannot be reversed through the first heat sink 43 and the cooling component 42 into the phase change cooling cavity 40, thereby helping to maintain the low temperature inside the phase change cooling cavity 40 and improve overall heat dissipation efficiency.

[0044] In one specific embodiment, the cooling component 42 includes a cold surface 421 and a hot surface 422 disposed opposite to each other. The cold surface 421 is attached to the outer wall of the phase change cooling cavity 40, and the hot surface 422 is attached to the first heat sink 43.

[0045] Specifically, the cooling component 42 includes a cold surface 421 and a hot surface 422 disposed opposite to each other. The cold surface 421 is attached to the outer wall of the phase change cooling cavity 40, while the hot surface 422 is attached to the first heat dissipation component 43. The cooling component 42, through the close contact between the cold surface 421 and the outer wall of the phase change cooling cavity 40, can transfer the heat absorbed by the phase change cooling cavity 40 from the cavity to the hot surface 422. The hot surface 422 effectively removes heat, ensuring that the temperature inside the phase change cooling cavity 40 is effectively controlled.

[0046] Furthermore, the close connection between the hot surface 422 and the first heat sink 43 ensures that heat can be quickly transferred from the hot surface 422 to the first heat sink 43, thereby guiding the heat to the outside of the heat dissipation system. Due to the tight connection between the hot surface 422 and the first heat sink 43, heat can be effectively conducted to the outside of the heat dissipation device through this connection, thereby achieving efficient heat dissipation.

[0047] Furthermore, the cold surface 421 and the hot surface 422 are in contact with the phase change cooling cavity 40 and the first heat sink 43, respectively, so that the cooling component 42 forms a structure in which both sides work in coordination. The cold surface 421 is responsible for absorbing heat from the phase change cooling cavity 40, while the hot surface 422 conducts the heat away through the first heat sink 43. Through this relative arrangement, the cooling component 42 can exert maximum efficiency in the heat dissipation system, ensuring that heat is efficiently transferred from the inside to the outside.

[0048] Furthermore, the contact between the cold surface 421 and the outer wall of the phase change cooling cavity 40 not only enhances the heat dissipation capacity of the phase change cooling cavity 40, but also helps optimize the heat exchange efficiency of the entire system. At the same time, the contact between the hot surface 422 and the first heat sink 43 ensures a smooth process of heat transfer from the cold surface 421 to the external heat dissipation device, ensuring that the system is always kept within a suitable temperature range.

[0049] In summary, by attaching the cold surface 421 and the hot surface 422 of the cooling component 42 to the outer wall of the phase change cooling cavity 40 and the first heat sink 43 respectively, an effective heat exchange path is formed. The reasonable arrangement of the cold surface 421 and the hot surface 422 ensures the high efficiency of the heat dissipation system and guarantees the long-term stable operation of the LCD projection screen heat dissipation device 100.

[0050] In one specific embodiment, the first heat sink 43 and the second heat sink 44 are heat dissipation fins.

[0051] Specifically, the first heat sink 43 and the second heat sink 44 are heat dissipation fins. As a highly efficient heat dissipation element, heat dissipation fins increase the contact area with the surrounding air, thereby improving heat dissipation efficiency. Using heat dissipation fins can significantly enhance the performance of the entire heat dissipation system.

[0052] Furthermore, the multiple elongated fin structures of the heat sink can provide a larger surface area, thereby improving heat dissipation efficiency. Both the first heat sink 43 and the second heat sink 44 adopt this heat sink design to effectively enhance the ability of heat to be transferred from the phase change cooling cavity 40 to the environment.

[0053] Furthermore, by using heat dissipation fins, the first heat sink 43 and the second heat sink 44 can exchange heat with the air more efficiently. These fin structures can accelerate the absorption and release of heat, especially under the action of airflow within the heat dissipation duct 11, the fins provide a higher heat exchange rate.

[0054] Furthermore, the heat sink fin design reduces space usage while ensuring effective heat dissipation, making the cooling device both efficient and compact. The increased surface area of ​​the fins ensures that the equipment maintains a low temperature during operation, thereby ensuring the stability and safety of the equipment.

[0055] In one specific embodiment, the screen display assembly 20 includes: an LCD screen 21 installed within the heat dissipation duct, heat-insulating glass surrounding the heat dissipation duct, and an imaging lens. The heat dissipation duct 11 has a turbulence slope 12, which is close to the screen display assembly 20, and the turbulence slope is located on both sides of the gap between the LCD screen 21 and the heat dissipation duct 11.

[0056] Specifically, the display assembly 20 includes an LCD screen 21, which is installed within the heat dissipation duct 11. The LCD screen 21 is specifically installed within the heat dissipation duct 11 to ensure that the airflow within the duct can be directly utilized to assist in heat dissipation.

[0057] Furthermore, the heat dissipation duct 11 is provided with a turbulence slope 12, which is close to the screen display component 20. The purpose of the turbulence slope 12 is to stimulate the turbulence effect of the airflow, so that the airflow generates stronger disturbance when flowing through the LCD screen 21, thereby enhancing the contact between the airflow and the surface of the LCD screen 21 and effectively improving the heat dissipation efficiency.

[0058] Furthermore, the LCD screen 21 is mounted on the turbulent slope 12. By mounting the LCD screen 21 at a specific location on the turbulent slope 12, the effect of turbulence can be maximized, thereby enhancing the cooling effect of the airflow on the LCD screen 21.

[0059] Furthermore, the design of the turbulence slope 12 ensures that the airflow path is irregular as it flows over the LCD screen 21, increasing airflow turbulence and allowing heat to be carried away from the surface of the LCD screen 21 more quickly, thus improving the overall heat dissipation effect. Through this arrangement, the temperature of the LCD screen 21 can be effectively controlled to prevent overheating.

[0060] In summary, the design of the turbulence slope 12 optimizes the airflow path of the heat dissipation duct 11. By mounting the LCD screen 21 on the turbulence slope 12, optimal contact with the airflow is achieved, further improving heat dissipation. This configuration ensures the heat dissipation system operates efficiently, effectively managing the temperature of the display component 20.

[0061] In one specific embodiment, the phase change liquid 41 is configured as an insulating phase change liquid, which includes any insulating and highly permeable material that can be vaporized at room temperature, such as perfluorocarbon, perfluoropolyether, or hydrofluorocarbon, preferably perfluoropentane.

[0062] Specifically, the phase change fluid 41 is perfluoropentane. Perfluoropentane is a common and highly efficient phase change fluid 41, possessing excellent thermal conductivity and thermal stability, enabling it to effectively absorb and release heat in a phase change cooling system. Using perfluoropentane as the phase change fluid 41 improves the heat dissipation efficiency of the heat dissipation device, ensuring that the projection equipment remains within a suitable temperature range during long-term operation.

[0063] Furthermore, the high heat capacity and low boiling point of perfluoropentane enable it to rapidly absorb heat and vaporize at low temperatures during the phase change process, further improving the thermal management capability of the phase change cooling system. After absorbing heat, the phase change liquid 41 becomes a gas and forms a cooling cycle through the refrigeration component 42, fan 30, and heat dissipation duct 11 in the system, effectively removing the heat generated by the equipment.

[0064] Furthermore, perfluoropentane exhibits high chemical stability, is not easily decomposed or produces harmful substances, and therefore can operate stably in high-temperature environments for extended periods. This not only improves system reliability but also reduces maintenance requirements. In addition, as an environmentally friendly liquid, perfluoropentane has minimal environmental impact, meeting the environmental requirements of modern cooling systems.

[0065] Furthermore, due to the low toxicity and good insulation properties of perfluoropentane, safety hazards can be avoided when used in electronic devices. As a phase change fluid 41, it can effectively transfer heat from the display assembly 20 to the cooling chamber, ensuring that the heat dissipation system operates under efficient and stable conditions.

[0066] In summary, by using perfluoropentane as the phase change fluid 41, the thermal management performance of the heat dissipation system is optimized. The superior thermal conductivity and chemical stability of perfluoropentane help improve the overall heat dissipation efficiency of the phase change cooling system, ensuring that the LCD projection screen heat dissipation device 100 can operate stably for a long time.

[0067] In one specific embodiment, the fan 30 is configured as an air pump.

[0068] Specifically, the fan 30 is configured as an air pump. As a fan 30, the air pump can provide a stable airflow, and by forcing airflow, it ensures that the gas in the heat dissipation duct 11 continuously circulates in a closed loop, thereby enhancing the heat exchange process.

[0069] Furthermore, the introduction of the air pump makes the airflow in the cooling duct 11 more efficient, continuously removing heat from the cooling duct 11. Compared with traditional natural convection or fans, the air pump can provide stronger airflow power, ensuring that the entire cooling system can maintain efficient heat dissipation even under high loads.

[0070] Furthermore, the air pump can adjust the speed and pressure of the airflow as needed to further optimize heat exchange efficiency. By adjusting the air pump, the airflow can be adjusted according to the temperature changes of the projection equipment under different operating conditions, thereby effectively avoiding overheating or performance degradation of the equipment due to excessive temperature.

[0071] Furthermore, the combination of the air pump and the cooling duct 11 ensures stable airflow along a closed-loop path, enhancing the cooling effect on the heat dissipation components. This not only improves heat dissipation efficiency but also provides more cooling capacity when needed, especially under heavy equipment loads.

[0072] In summary, by replacing the fan 30 with an air pump, the airflow circulation of the cooling system is optimized. The air pump provides powerful airflow, ensuring a continuous and stable flow of gas within the cooling duct 11, thereby improving the overall cooling efficiency of the cooling device and ensuring that the LCD projection screen cooling device 100 maintains a suitable temperature during efficient operation.

[0073] In one specific embodiment, the fan 30 is configured as a turbine fan.

[0074] Specifically, the fan 30 is a turbo fan. As a fan 30, the turbo fan can generate a strong airflow by rotating, which helps the gas flow in the heat dissipation duct 11 and enhances the heat exchange efficiency between the air and the heat dissipation components.

[0075] Furthermore, the design of the turbo fan enables it to provide highly efficient airflow. Compared to ordinary fans, turbo fans can generate stronger airflow within a smaller volume, thus more effectively propelling the gas in the cooling duct 11 along a closed-loop path. The turbo fan ensures a continuous supply of sufficient airflow even under high cooling demands, thereby guaranteeing cooling efficiency.

[0076] Furthermore, the efficient airflow generated by the turbo fan promotes effective contact between the heat dissipation components and the airflow in the cooling system. These components include the phase change cooling chamber 40 and heat sink fins. By increasing the airflow velocity and volume, the turbo fan enhances the contact area between the gas and the heat dissipation surface, thereby increasing heat transfer and helping the equipment cool down quickly.

[0077] Furthermore, the working principle of turbo fans can adapt to different heat dissipation needs, providing flexible airflow adjustment. Whether operating under low or high load conditions, turbo fans can maintain a stable airflow output, ensuring that the temperature of the equipment remains within a suitable range during long-term operation.

[0078] In summary, by setting the fan 30 as a turbine fan, the airflow circulation within the heat dissipation duct 11 is optimized. The turbine fan provides powerful and stable airflow, effectively improving the heat exchange capacity of the heat dissipation system and ensuring that the LCD projection screen heat dissipation device 100 can effectively dissipate heat and maintain a suitable operating temperature during high-efficiency operation.

[0079] Therefore, the LCD projection screen heat dissipation device 100 provided above adopts a phase change cooling chamber 40 connected to the heat dissipation duct 11 to contain the phase change liquid 41. The phase change liquid 41 is used to quickly reduce the temperature of the circulating gas by vaporization and condensation process, and the heat conduction is enhanced by the cooling component 42 to ensure the stable operation of the screen display component 20 for a long time, avoiding screen burn-in and color deviation problems caused by overheating.

[0080] The above description is merely an embodiment of this application. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this application, but these improvements all fall within the protection scope of this application.

Claims

1. A heat dissipation device for an LCD projection screen, characterized in that, include: The housing has a closed-loop heat dissipation air duct inside; The screen display component is located within the heat dissipation duct and the housing. A fan, located inside the heat dissipation duct, is used to drive the gas inside the heat dissipation duct to circulate along the closed-loop duct. A phase change cooling chamber is disposed inside the housing and communicates with the heat dissipation duct, and the phase change cooling chamber contains a phase change liquid; The phase change liquid absorbs heat and vaporizes to form a cooling gas, which flows sequentially through the fan, the screen display component in the heat dissipation duct, and the phase change cooling chamber.

2. The LCD projection screen heat dissipation device according to claim 1, characterized in that, The phase change cooling cavity and the screen display assembly are arranged opposite each other along the closed-loop path of the heat dissipation duct.

3. The LCD projection screen heat dissipation device according to claim 1, characterized in that, The phase change cooling chamber includes: The first heat dissipation component is fitted and connected to the housing and is located outside the phase change cooling cavity; The second heat sink is located inside the phase change cooling chamber, and a portion of the second heat sink is immersed in the phase change liquid.

4. The LCD projection screen heat dissipation device according to claim 3, characterized in that, The phase change cooling chamber further includes a cooling component, which is connected to the housing. The cooling component is attached to the first heat sink and the phase change cooling chamber respectively. The cooling component is located between the first heat sink and the phase change cooling chamber and is used to maintain the temperature of the phase change liquid.

5. The LCD projection screen heat dissipation device according to claim 4, characterized in that, The cooling component includes a cold surface and a hot surface arranged opposite to each other. The cold surface is attached to the outer wall of the phase change cooling cavity, and the hot surface is attached to the first heat dissipation component.

6. The LCD projection screen heat dissipation device according to claim 3, characterized in that, The first heat sink and the second heat sink are heat dissipation fins.

7. The LCD projection screen heat dissipation device according to claim 1, characterized in that, The screen display component includes: an LCD screen installed in the heat dissipation duct, heat-insulating glass surrounding the heat dissipation duct, and an imaging lens; The heat dissipation duct has a turbulence slope, which is close to the screen display component and is located on both sides of the gap between the LCD screen and the heat dissipation duct.

8. The LCD projection screen heat dissipation device according to claim 1, characterized in that, The phase change fluid is configured as an insulating phase change fluid.

9. The LCD projection screen heat dissipation device according to claim 1, characterized in that, The fan is configured as an air pump.

10. The LCD projection screen heat dissipation device according to claim 1, characterized in that, The fan is a turbine fan.

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