Projection device

Abstract

The application is suitable for the technical field of projection equipment, and provides a projection equipment, which comprises a shell, a projection part, a first heat dissipation part and a water collecting part, wherein the shell is internally provided with a first containing cavity; the projection part comprises an optical assembly, the projection part is arranged in the first containing cavity, and is used for projecting an image to an external environment; the first heat dissipation part comprises a main body, an air cooling assembly and a thermoelectric refrigeration assembly, the main body is internally provided with a second containing cavity, the thermoelectric refrigeration assembly is arranged on the main body, a refrigeration end of the thermoelectric refrigeration assembly is arranged in the second containing cavity, and the refrigeration end is used for cooling air in the second containing cavity; the main body is provided with a first air outlet, and the air cooling assembly can blow the cooled air to the optical assembly through the first air outlet. Compared with the way of increasing air flow by pulling up the rotation speed of the air blower to improve the heat dissipation effect in the prior art, the projection equipment provided by the application has the same heat dissipation effect, and the generated noise is lower.

Description

Projection equipment Technical Field

[0001] This application belongs to the field of projection equipment technology, and more specifically, relates to a projection device. Background Technology

[0002] Most existing small and medium-sized LCD projectors are designed to use ambient temperature air cooling. They typically employ a high-pressure DC blower with a specially designed air duct to precisely deliver airflow to the optical lenses and display components, thereby removing heat and keeping their operating temperature within a controllable range. As the luminous flux of the optical engine increases, the heat generated by the optical lenses and display components also increases. If the size of the optical engine does not increase proportionally, it is necessary to increase the airflow through the optical lenses and display components to remove even more heat.

[0003] However, increasing the airflow inevitably requires increasing the air volume of the blower, which means the blower speed will increase, and the noise will increase. Increased noise in the whole machine will reduce the product's competitiveness and practicality. Summary of the Invention

[0004] The purpose of this application is to provide a projection device that addresses the technical problem of excessive noise in existing LCD projectors.

[0005] To achieve the above objectives, according to one aspect of this application, a projection device is provided, comprising: a housing, a projection section, a first heat dissipation section, and a water collection section, wherein a first receiving cavity is provided within the housing; the projection section includes an optical component and a light source, and is disposed within the first receiving cavity, and is used to project images into the external environment; the first heat dissipation section includes a main body, an air-cooling component, and a thermoelectric cooling component, and a second receiving cavity is provided within the main body, the main body is disposed within the first receiving cavity, the thermoelectric cooling component is disposed on the main body, the air-cooling component is disposed within the second receiving cavity, and the cooling end of the thermoelectric cooling component is disposed within the second receiving cavity, the cooling end being used to cool the air within the second receiving cavity; a first air outlet communicating with the second receiving cavity is provided on the main body, the first air outlet being positioned opposite the optical component, and the air-cooling component being able to blow cooled air onto the optical component through the first air outlet; the water collection section includes a water collection component, which is disposed within the second receiving cavity, and the water collection component includes a water-blocking structure disposed between the first air outlet and the cooling end, for blocking condensate generated on the cooling end to prevent condensate from contacting the optical component.

[0006] Optionally, the second receiving cavity includes an air inlet cavity and an air guide cavity communicating with the air inlet cavity. The air guide cavity is located between the cooling end and the optical component and is communicating with the first air outlet. The cooling end is disposed in the air inlet cavity, and the water-blocking structure is disposed in the air guide cavity. The water collection component also includes a first water collection tank, which is disposed in the air guide cavity and located below the water-blocking structure, for collecting condensate flowing down from the water-blocking structure.

[0007] Optionally, the water collection section further includes a first water conveying component, which is disposed in the first receiving cavity. The first end of the first water conveying component is disposed in the first water collection tank, and the second end of the first water conveying component is connected to the external environment. The first water conveying component is used to transport the condensate in the first water collection tank to the external environment.

[0008] Optionally, the water collection assembly also includes a second water collection tank, which is disposed inside the air guide cavity. When the projection device is inverted, the second water collection tank can collect the condensate flowing down the water-blocking structure.

[0009] Optionally, the water collection section further includes a second water conveying component, which is disposed in the first receiving cavity. The first end of the second water conveying component is disposed in the second water collection tank, and the second end of the second water conveying component is connected to the external environment. The second water conveying component is used to transport the condensate in the second water collection tank to the external environment.

[0010] Optionally, the projection device further includes a second heat dissipation unit disposed within the first receiving cavity for dissipating heat from the light source. A second air outlet is provided on the housing, communicating with the first receiving cavity and positioned opposite to the second heat dissipation unit. The second ends of both the first and second water supply components are disposed on the second heat dissipation unit. The first water supply component can transport condensate from the first water collection tank to the second heat dissipation unit, and the second water supply component can transport condensate from the second water collection tank to the second heat dissipation unit. Alternatively, a third air outlet is provided on the housing, communicating with the first receiving cavity and positioned opposite to the heating end of the thermoelectric cooling component. The second ends of both the first and second water supply components are disposed on the heating end. The first water supply component can transport condensate from the first water collection tank to the heating end, and the second water supply component can transport condensate from the second water collection tank to the heating end.

[0011] Optionally, the thermoelectric cooling assembly includes a thermoelectric cooling chip and a cold-end heat exchanger. The thermoelectric cooling chip is disposed on the main body, and a cooling surface is formed on the end of the thermoelectric cooling chip near the air inlet cavity. The cold-end heat exchanger is disposed in the air inlet cavity and is in contact with the cooling surface. The cold-end heat exchanger and the cooling surface of the thermoelectric cooling chip together form the cooling end of the thermoelectric cooling assembly. The thermoelectric cooling assembly also includes a first heat sink, and a heating surface is formed on the end of the thermoelectric cooling chip away from the air inlet cavity. The first heat sink is disposed in the first receiving cavity and is in contact with the heating surface. The first heat sink and the heating surface of the thermoelectric cooling chip together form the heating end of the thermoelectric cooling assembly. The thermoelectric cooling assembly also includes a first cooling fan, which is disposed on the first heat sink and is used to blow air from the first receiving cavity onto the first heat sink.

[0012] Optionally, the second heat dissipation part includes a second heat sink, which is disposed in the first receiving cavity and is used to dissipate heat from the light source; the second heat dissipation part also includes a second cooling fan, which is disposed on the second heat sink and is used to blow air from the first receiving cavity onto the second heat sink.

[0013] Optionally, the water collection section further includes a first hydrogel membrane, which is disposed on the second heat sink. The second ends of the first water supply component and the second water supply component are both disposed on the first hydrogel membrane. The first water supply component can transport the condensate in the first water collection tank to the first hydrogel membrane, and the second water supply component can transport the condensate in the second water collection tank to the first hydrogel membrane.

[0014] Optionally, the water collection section further includes a second hydrogel membrane, which is disposed on the first heat sink. The second ends of the first water conveying component and the second water conveying component are both disposed on the second hydrogel membrane. The first water conveying component can transport the condensate in the first water collection tank to the second hydrogel membrane, and the second water conveying component can transport the condensate in the second water collection tank to the second hydrogel membrane.

[0015] The beneficial effects of the projection device provided in this application are as follows: Compared with the prior art, the projection device provided in this application, by setting an air-cooling component and a thermoelectric cooling component on the main body, enables the projection device to cool the air in the second accommodating cavity through the thermoelectric cooling component, and then blow the cooled air onto the optical component of the projection part through the first air outlet, thereby achieving heat dissipation for the optical component of the projection part. Compared with the prior art method of increasing the blower speed and increasing the airflow to improve the heat dissipation effect, the projection device provided in this application has the same heat dissipation effect while generating lower noise, effectively improving the user experience. At the same time, the projection device provided in this application, by setting a water-blocking structure between the cooling end and the first air outlet, can prevent the condensate generated on the thermoelectric cooling component from contacting the optical element, thereby effectively improving the reliability of the projection device. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 is a schematic diagram of the projection device provided in an embodiment of this application;

[0018] Figure 2 is a schematic diagram of the projection device from another perspective provided in an embodiment of this application;

[0019] Figure 3 is a schematic diagram of the structure of the projection device with some parts removed according to an embodiment of this application;

[0020] Figure 4 is a schematic diagram of the structure of a projection device with some parts removed from another perspective according to an embodiment of this application;

[0021] Figure 5 is a cross-sectional schematic diagram of the projection device provided in an embodiment of this application;

[0022] Figure 6 is a partial cross-sectional schematic diagram of the projection device from another perspective provided in an embodiment of this application;

[0023] The details of the reference numerals used in the above figures are as follows:

[0024] 10. Housing; 11. First receiving cavity; 12. First air inlet; 13. Second air inlet; 14. Second air outlet; 15. Third air outlet;

[0025] 20. Projection section;

[0026] 30. First heat dissipation unit; 31. Main body; 311. First air outlet; 312. Second receiving cavity; 3121. Air inlet cavity; 3122. Air guide cavity; 3123. First partition plate; 3124. U-shaped mounting structure; 32. Air-cooled assembly; 33. Thermoelectric refrigeration assembly; 331. Thermoelectric refrigeration element; 332. Cold end heat exchanger; 333. First heat sink; 334. First cooling fan;

[0027] 40. Second heat dissipation unit; 41. Second heat sink; 42. Second cooling fan;

[0028] 50. Water collection section; 51. Water collection assembly; 511. First water collection tank; 512. Second water collection tank; 513. Water-blocking structure; 52. First water conveying component; 53. Second water conveying component; 54. Third water conveying component. Detailed Implementation

[0029] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0030] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly or indirectly on that other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to that other element. Unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0033] As described in the background section, most existing small and medium-sized LCD projectors are designed with ambient air cooling. They typically use a high-pressure DC blower with a specially designed air duct to precisely deliver airflow to the optical lenses and display elements, thereby removing heat and keeping their operating temperature within a controllable range. As the luminous flux of the optical engine increases, the heat generated by the optical lenses and display elements also increases. If the size of the optical engine does not increase proportionally, it is necessary to increase the airflow through the optical lenses and display elements to remove even more heat. However, increasing the airflow inevitably requires increasing the blower's air volume, which means increasing the blower's speed and noise. Increased overall noise reduces the product's competitiveness and practicality.

[0034] Referring to Figures 1 to 6, to address the aforementioned problems, according to one aspect of this application, an embodiment of this application provides a projection device. The projection device includes: a housing 10, a projection section 20, a first heat dissipation section 30, and a water collection section 50. The housing 10 contains a first receiving cavity 11. The projection section 20 includes optical components and a light source, and is disposed within the first receiving cavity 11, projecting images into the external environment. The first heat dissipation section 30 includes a main body 31, a wind-cooling component 32, and a thermoelectric cooling component 33. The main body 31 contains a second receiving cavity 312, and is disposed within the first receiving cavity 11. The thermoelectric cooling component 33 is disposed on the main body 31, and the wind-cooling component 32 is disposed on the second receiving cavity 312. Inside the receiving cavity 312, the cooling end of the thermoelectric cooling component 33 is located inside the second receiving cavity 312, and the cooling end is used to cool the air inside the second receiving cavity 312. The main body 31 is provided with a first air outlet 311 that communicates with the second receiving cavity 312. The first air outlet 311 is positioned opposite to the optical component, and the air-cooling component 32 can blow the cooled air onto the optical component through the first air outlet 311. The water collection part 50 includes a water collection component 51, which is located inside the second receiving cavity 312. The water collection component 51 includes a water-blocking structure 513, which is located between the first air outlet 311 and the cooling end, and is used to block the condensate generated on the cooling end to prevent the condensate from contacting the optical component. The projection device provided in this embodiment, by setting an air-cooling component 32 and a thermoelectric cooling component 33 on the main body 31, enables the projection device to cool the air in the second receiving cavity 312 through the thermoelectric cooling component 33, and blow the cooled air onto the optical component of the projection unit 20 through the first air outlet 311 through the air-cooling component 32, thereby achieving heat dissipation for the optical component of the projection unit 20. Compared with the prior art method of increasing the blower speed and airflow to improve the heat dissipation effect, the projection device provided in this embodiment has the same heat dissipation effect while generating lower noise, effectively improving the user experience.

[0035] In a preferred embodiment, the optical components provided in this embodiment include optical lenses, display elements, and other components.

[0036] When the thermoelectric cooling component 33 provided in this embodiment operates under heavy load and high humidity conditions, and the temperature of the cooling end is lower than the dew point temperature, condensation will occur on the cooling end. If the condensation enters the air duct, it may cause failure of optical lenses, display elements, etc.

[0037] To solve the above problems, the projection device provided in this embodiment provides a water-blocking structure 513 between the cooling end and the first air outlet 311, so that the condensate generated on the thermoelectric cooling component 33 can be blocked by the water-blocking structure 513, thereby preventing the condensate from contacting the optical elements and effectively improving the reliability of the projection device.

[0038] Referring to Figure 5, in order to collect the condensate on the water-blocking structure 513 provided in this embodiment, the second receiving cavity 312 in this embodiment includes an air inlet cavity 3121 and an air guide cavity 3122 communicating with the air inlet cavity 3121. The air guide cavity 3122 is located between the cooling end and the optical component and communicates with the first air outlet 311. The cooling end is disposed in the air inlet cavity 3121, and the water-blocking structure 513 is disposed in the air guide cavity 3122. The water collection component 51 also includes a first water collection tank 511, which is disposed in the air guide cavity 3122 and located below the water-blocking structure 513, for collecting the condensate flowing down from the water-blocking structure 513. By providing the first water collection tank 511 in the air guide cavity 3122 provided in this embodiment and placing the first water collection tank 511 below the water-blocking structure 513, the projection device provided in this embodiment can collect the condensate flowing down from the water-blocking structure 513 through the first water collection tank 511.

[0039] In a preferred embodiment, the second receiving cavity 312 provided in this embodiment is provided with a first partition 3123. The first partition 3123 is used to divide the second receiving cavity 312 into an air inlet cavity 3121 and an air guide cavity 3122. The first partition 3123 provided in this embodiment is provided with a communication port. The communication port provided in this embodiment is used to communicate with the air inlet cavity 3121 along with the air guide cavity 3122.

[0040] Referring to Figures 1 to 5, in order to transport the condensate in the first water collection tank 511 provided in this embodiment to the external environment, the water collection unit 50 in this embodiment also includes a first water conveying component 52. The first water conveying component 52 is disposed in the first receiving cavity 11, with its first end disposed in the first water collection tank 511 and its second end communicating with the external environment. The first water conveying component 52 is used to transport the condensate in the first water collection tank 511 to the external environment. By disposing of the first water conveying component 52 in the first receiving cavity 11 provided in this embodiment, and with its first end disposed in the first water collection tank 511 and its second end communicating with the external environment, the condensate in the first water collection tank 511 provided in this embodiment can be transported to the external environment through the first water conveying component 52, avoiding the condensate from affecting other components of the projection device and improving the reliability of the projection device provided in this embodiment.

[0041] Referring to Figures 1 to 5, in order to enable the projection device provided in this embodiment to collect condensate on the water-blocking structure 513 even when inverted, the water collection assembly 51 in this embodiment further includes a second water collection tank 512. The second water collection tank 512 is disposed within the air guide cavity 3122. When the projection device is inverted, the second water collection tank 512 can collect the condensate flowing down from the water-blocking structure 513. By providing the second water collection tank 512 within the air guide cavity 3122 provided in this embodiment, the projection device provided in this embodiment can collect condensate on the water-blocking structure 513 through the second water collection tank 512 even when inverted.

[0042] Referring to Figures 1 to 5, in order to transport the water in the second water collection tank 512 provided in this embodiment to the external environment, the water collection unit 50 in this embodiment also includes a second water conveying component 53. The second water conveying component 53 is disposed in the first receiving cavity 11, with its first end disposed in the second water collection tank 512 and its second end communicating with the external environment. The second water conveying component 53 is used to transport the condensate in the second water collection tank 512 to the external environment. By disposing of the second water conveying component 53 in the first receiving cavity 11 provided in this embodiment, and with its first end disposed in the second water collection tank 512 and its second end communicating with the external environment, the condensate in the second water collection tank 512 provided in this embodiment can be transported to the external environment through the second water conveying component 53, avoiding the condensate from affecting other components of the projection device and improving the reliability of the projection device provided in this embodiment.

[0043] Referring to Figures 1 to 4, in order to dissipate heat from the light source of the projection unit 20 provided in this embodiment, the projection device in this embodiment further includes a second heat dissipation unit 40. The second heat dissipation unit 40 is disposed in the first receiving cavity 11 and is used to dissipate heat from the light source. A second air outlet 14 is provided on the housing 10. The second air outlet 14 communicates with the first receiving cavity 11 and is disposed opposite to the second heat dissipation unit 40. The second ends of the first water conveying component 52 and the second water conveying component 53 are both disposed on the second heat dissipation unit 40. The first water conveying component 52 can transport the condensate in the first water collecting tank 511 to the second heat dissipation unit 40, and the second water conveying component 53 can transport the condensate in the second water collecting tank 512 to the second heat dissipation unit 40. On the heat dissipation part 40; by providing a second heat dissipation part 40 in the first receiving cavity 11 provided in this embodiment, and by setting the second end of the first water supply component 52 and the second end of the second water supply component 53 on the second heat dissipation part 40, the condensate in the first water collection tank 511 can be transported to the second heat dissipation part 40 through the first water supply component 52. Since the second heat dissipation part 40 has a high temperature when it is working, the condensate will evaporate on the second heat dissipation part 40 after it is transported to the second heat dissipation part 40, and will be discharged into the external environment through the second air outlet 14. The evaporation of the condensate will take away some of the heat on the second heat dissipation part 40, so that the second heat dissipation part 40 has a better heat dissipation effect.

[0044] In another embodiment, a third air outlet 15 is provided on the housing 10. The third air outlet 15 is connected to the first receiving cavity 11 and is disposed opposite to the heating end of the thermoelectric cooling component 33. The second ends of the first water supply component 52 and the second water supply component 53 are both disposed on the heating end. The first water supply component 52 can transport the condensate in the first water collection tank 511 to the heating end, and the second water supply component 53 can transport the condensate in the second water collection tank 512 to the heating end. By setting the second end of the first water supply component 52 and the second end of the second water supply component 53 provided in this embodiment on the heating end of the thermoelectric cooling component 33, the condensate in the first water collection tank 511 can be transported to the heating end through the first water supply component 52. Since the heating end has a high temperature when it is working, the condensate will evaporate on the heating end after it is transported to the heating end and discharged into the external environment through the third air outlet 15. The evaporation of the condensate will take away some of the heat on the heating end. Since the greater the temperature difference between the heating end and the cooling end of the thermoelectric cooling component 33, the greater the energy consumption, when the condensate evaporates on the heating end, the temperature of the heating end can be effectively reduced, thereby reducing the energy consumption of the thermoelectric cooling component 33.

[0045] Referring to Figures 3 to 5, in one specific embodiment, to enable the cooling end of the thermoelectric cooling assembly 33 provided in this embodiment to better cool the air in the second receiving cavity 312, the thermoelectric cooling assembly 33 in this embodiment includes a thermoelectric cooling chip 331 and a cold-end heat exchanger 332. The thermoelectric cooling chip 331 is disposed on the main body 31, and a cooling surface is formed on the end of the thermoelectric cooling chip 331 near the air inlet cavity 3121. The cold-end heat exchanger 332 is disposed in the air inlet cavity 3121 and is in contact with the cooling surface. The cold-end heat exchanger 332 and the cooling surface of the thermoelectric cooling chip 331 together form the cooling end of the thermoelectric cooling assembly 33. By providing the cold-end heat exchanger 332 in the air inlet cavity 3121 provided in this embodiment and making the cold-end heat exchanger 332 in contact with the cooling surface of the thermoelectric cooling chip 331, the contact area between the cooling end of the thermoelectric cooling assembly 33 and the air in the second receiving cavity 312 can be effectively increased, thereby effectively improving the cooling efficiency of the cooling end provided in this embodiment.

[0046] Referring to Figures 3 to 5, in one specific embodiment, the thermoelectric cooling assembly 33 further includes a first heat sink 333. A heating surface is formed on the end of the thermoelectric cooling fin 331 away from the air inlet cavity 3121. The first heat sink 333 is disposed in the first receiving cavity 11 and is in contact with the heating surface. The first heat sink 333 and the heating surface of the thermoelectric cooling fin 331 together form the heating end of the thermoelectric cooling assembly 33. By disposing of the first heat sink 333 in the first receiving cavity 11 and making the first heat sink 333 in contact with the heating surface, the heating end of the thermoelectric cooling assembly 33 can quickly dissipate heat through the first heat sink 333, thereby reducing the energy consumption of the thermoelectric cooling assembly 33.

[0047] Referring to Figures 3 to 5, to improve the heat dissipation effect of the first heat sink 333 provided in this embodiment, the thermoelectric cooling assembly 33 in this embodiment further includes a first cooling fan 334. The first cooling fan 334 is disposed on the first heat sink 333 and is used to blow air from the first receiving cavity 11 onto the first heat sink 333. By disposing of the first cooling fan 334 on the first heat sink 333 provided in this embodiment, the air in the first receiving cavity 11 provided in this embodiment can be blown onto the first heat sink 333 under the action of the first cooling fan 334, thereby effectively improving the heat dissipation effect of the first heat sink 333 provided in this embodiment.

[0048] In one specific embodiment, the second heat dissipation part 40 includes a second heat dissipation fin 41, which is disposed in the first receiving cavity 11 and is used to dissipate heat from the light source.

[0049] In one specific embodiment, the second heat dissipation unit 40 provided in this embodiment further includes a second cooling fan 42, which is disposed on the second heat sink 41 and is used to blow air from the first receiving cavity 11 onto the second heat sink 41. By providing the second cooling fan 42 on the second heat sink 41 provided in this embodiment, the air in the first receiving cavity 11 can be blown onto the second heat sink 41 under the action of the second cooling fan 42, thereby effectively improving the heat dissipation effect of the second heat sink 41 provided in this embodiment.

[0050] To enable rapid evaporation of the condensate delivered to the second heat sink 41, the water collection unit 50 in this embodiment further includes a first hydrogel membrane. The first hydrogel membrane is disposed on the second heat sink 41, and the second ends of both the first water delivery component 52 and the second water delivery component 53 are disposed on the first hydrogel membrane. The first water delivery component 52 can deliver the condensate in the first water collection tank 511 to the first hydrogel membrane, and the second water delivery component 53 can deliver the condensate in the second water collection tank 512 to the first hydrogel membrane. Because hydrogel has high water vapor permeability and liquid water wettability, the first hydrogel membrane disposed on the second heat sink 41 can effectively absorb the liquid condensate. Furthermore, the condensate within the first hydrogel membrane can be evaporated and discharged into the external environment under the action of the second heat sink 41 and the second cooling fan 42, thereby improving the heat dissipation effect of the second heat sink 41.

[0051] To enable rapid evaporation of the condensate delivered to the first heat sink 333, the water collection unit 50 in this embodiment further includes a second hydrogel membrane. The second hydrogel membrane is disposed on the first heat sink 333, and the second ends of both the first water delivery component 52 and the second water delivery component 53 are disposed on the second hydrogel membrane. The first water delivery component 52 can deliver the condensate in the first water collection tank 511 to the second hydrogel membrane, and the second water delivery component 53 can deliver the condensate in the second water collection tank 512 to the second hydrogel membrane. The second hydrogel membrane disposed on the first heat sink 333 can effectively absorb the liquid condensate, and the condensate within the second hydrogel membrane can also be evaporated and discharged into the external environment under the action of the first heat sink 333 and the first cooling fan 334, thereby improving the heat dissipation effect of the first heat sink 333.

[0052] In a preferred embodiment, both the first heat sink 333 and the second heat sink 41 provided in this embodiment are provided with fins. The first hydrogel film provided in this embodiment is laid flat on the fins of the second heat sink 41, and the second hydrogel film is laid flat on the fins of the first heat sink 333.

[0053] In a preferred embodiment, the air-cooling component 32 provided in this embodiment is disposed in the air guide cavity 3122. The air inlet of the air-cooling component 32 provided in this embodiment is connected to the air guide cavity 3122, and the air outlet is connected to the first air outlet 311.

[0054] In one specific embodiment, the air-cooled component 32 provided in this embodiment includes a blower and an air duct. The blower and the air duct provided in this embodiment are both disposed in the air guide cavity 3122. The air inlet of the blower forms the air inlet of the air-cooled component 32. The air guide channel is provided in this embodiment. The two ends of the air guide channel are respectively connected to the air outlet of the blower and the first air outlet 311. The end of the air guide channel away from the blower forms the air outlet of the air-cooled component 32.

[0055] In a preferred embodiment, the housing 10 provided in this embodiment is provided with a first air inlet 12. The first air inlet 12 provided in this embodiment is connected to the air inlet cavity 3121. When the blower is working, the air in the external environment can enter the air inlet cavity 3121 through the first air inlet 12.

[0056] In a preferred embodiment, a U-shaped mounting structure 3124 is provided inside the air inlet cavity 3121 provided in this embodiment. The cold end heat exchanger 332 provided in this embodiment is mounted on the U-shaped mounting structure 3124. Multiple fins are spaced apart on the end of the cold end heat exchanger 332 away from the thermoelectric cooling plate 331. An air inlet channel is formed between two adjacent fins and the bottom wall of the U-shaped mounting structure 3124. The air inlet channel provided in this embodiment is connected to the communication port.

[0057] In one specific embodiment, the water-blocking structure 513 provided in this embodiment is a water-blocking plate. The water-blocking plate provided in this embodiment is disposed in the air guide cavity 3122 and is disposed opposite to the communication port. A second water collection trough 512 is formed between the water-blocking plate and the first partition 3123.

[0058] In a preferred embodiment, a second partition is provided inside the air guide cavity 3122 provided in this embodiment, and a first water collection tank 511 is formed between the second partition and the first partition 3123 provided in this embodiment.

[0059] In a preferred embodiment, the first water collection tank 511 and the second water collection tank 512 provided in this embodiment are arranged opposite to each other. A water-blocking slope is provided on the end of the baffle plate near the first water collection tank 511. The water-blocking slope provided in this embodiment gradually slopes towards the communication port from the second water collection tank 512 to the first water collection tank 511.

[0060] In one specific embodiment, when the blower provided in this embodiment is working, due to the high air pressure of the blower and the small fin spacing of the cold end heat exchanger 332, the condensate will move towards the baffle plate along the airflow before it forms large water droplets, and slide down into the first water collection tank 511 or the second water collection tank 512 along the air inlet channel. If the condensate forms a water column covering the gap of the cold end heat exchanger 332, the water column can move towards the baffle plate under the drive of the airflow, hit the baffle plate with a certain initial velocity, and slide down into the first water collection tank 511 or the second water collection tank 512.

[0061] In a preferred embodiment, the first water supply component 52 and the second water supply component 53 provided in this embodiment are both PVA cotton swabs. By setting the first water supply component 52 and the second water supply component 53 as PVA cotton swabs, the condensate in the first water collection tank 511 and the second water collection tank 512 can be transported to the first heat sink 333 or the second heat sink 41 through capillary action.

[0062] In a preferred embodiment, the water collection part 50 provided in this embodiment further includes a first water-proof sleeve and a second water-proof sleeve. The first water-proof sleeve provided in this embodiment is sleeved on the first water conveying component 52, and the second water-proof sleeve is sleeved on the second water conveying component 53. By setting the first water-proof sleeve and the second water-proof sleeve, the condensation on the first water conveying component 52 and the second water conveying component 53 can be effectively prevented from wetting other components during the transmission process, thus ensuring the insulation performance of the projection device.

[0063] In a preferred embodiment, the water collection part 50 provided in this embodiment further includes a third water conveying component 54. The second end of the first water conveying component 52 and the second end of the second water conveying component 53 are both disposed on the third water conveying component 54. The third water conveying component 54 provided in this embodiment can contact the second hydrogel film laid flat on the fins of the first heat sink 333, or contact the first hydrogel film laid flat on the fins of the second heat sink 41.

[0064] In a preferred embodiment, the third water delivery component 54 provided in this embodiment is a flat PVA cotton swab.

[0065] In a preferred embodiment, the housing 10 provided in this embodiment is provided with a second air inlet 13. The second air inlet 13 provided in this embodiment is connected to the first receiving cavity 11. When the first cooling fan 334 and or the second cooling fan 42 are working, air from the external environment can enter the first receiving cavity 11 through the second air inlet 13.

[0066] In summary, the projection device provided in this embodiment has at least the following beneficial technical effects: The projection device provided in this embodiment, by setting a wind-cooling component 32 and a thermoelectric cooling component 33 on the main body 31, enables the projection device to cool the air in the second accommodating cavity 312 through the thermoelectric cooling component 33, and then blow the cooled air onto the optical components of the projection section 20 through the first air outlet 311 via the wind-cooling component 32, thereby achieving heat dissipation for the optical components of the projection section 20. Compared with the prior art method of increasing the blower speed and airflow to improve heat dissipation, the projection device provided in this embodiment achieves the same heat dissipation effect while generating lower noise, effectively improving the user experience. Simultaneously, the projection device provided in this embodiment, by setting a water-blocking structure 513 between the cooling end and the first air outlet 311, prevents condensate generated on the thermoelectric cooling component 33 from contacting the optical elements, effectively improving the reliability of the projection device.

[0067] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A projection device, characterized in that, The projection device includes: a housing (10) having a first receiving cavity (11) inside the housing (10); a projection unit (20) including an optical component and a light source, the projection unit (20) being disposed within the first receiving cavity (11) and used to project images into the external environment; and a first heat dissipation unit (30) including a main body (31), an air-cooling component (32), and a thermoelectric cooling component (33), the main body (31) having a second receiving cavity (312) inside the main body (31), the main body (31) being disposed within the first receiving cavity (11), and the thermoelectric cooling component (33) being disposed within the main body. (31) The air-cooling component (32) is disposed in the second accommodating cavity (312), and the cooling end of the thermoelectric cooling component (33) is disposed in the second accommodating cavity (312). The cooling end is used to cool the air in the second accommodating cavity (312). The main body (31) is provided with a first air outlet (311) communicating with the second accommodating cavity (312). The first air outlet (311) is opposite to the position of the optical component. The air-cooling component (32) can blow the cooled air onto the optical component through the first air outlet (311). Water collection part (50) includes water collection component (51). The water collection component (51) is disposed in the second receiving cavity (312). The water collection component (51) includes a water-blocking structure (513), which is disposed between the first air outlet (311) and the cooling end to block the condensate generated on the cooling end, so as to prevent the condensate from contacting the optical component. The second receiving cavity (312) includes an air inlet cavity (3121) and an air guide cavity (3122) communicating with the air inlet cavity (3121). The air guide cavity (3122) is located between the cooling end and the optical component and communicates with the first air outlet (311). The cooling end is disposed in the air inlet cavity (3121). Inside the air guide cavity (3121), the water-blocking structure (513) is disposed inside the air guide cavity (3122); the water collection assembly (51) further includes a first water collection tank (511), which is disposed inside the air guide cavity (3122) and located below the water-blocking structure (513) for collecting condensate flowing down from the water-blocking structure (513); the water collection assembly (51) further includes a second water collection tank (512), which is disposed inside the air guide cavity (3122). When the projection device is inverted, the second water collection tank (512) can collect condensate flowing down from the water-blocking structure (513).

2. The projection device according to claim 1, characterized in that, The water collection section (50) further includes a first water conveying component (52), which is disposed in the first receiving cavity (11). The first end of the first water conveying component (52) is disposed in the first water collection tank (511), and the second end of the first water conveying component (52) is connected to the external environment. The first water conveying component (52) is used to transport the condensate in the first water collection tank (511) to the external environment.

3. The projection device according to claim 2, characterized in that, The water collection section (50) further includes a second water conveying component (53), which is disposed in the first receiving cavity (11). The first end of the second water conveying component (53) is disposed in the second water collection tank (512), and the second end of the second water conveying component (53) is connected to the external environment. The second water conveying component (53) is used to transport the condensate in the second water collection tank (512) to the external environment.

4. The projection device according to claim 3, characterized in that, The projection device further includes a second heat dissipation unit (40), which is disposed in the first receiving cavity (11) for dissipating heat from the light source. A second air outlet (14) is provided on the housing (10), communicating with the first receiving cavity (11) and positioned opposite to the second heat dissipation unit (40). The second ends of the first water conveying component (52) and the second water conveying component (53) are both disposed on the second heat dissipation unit (40). The first water conveying component (52) can transport the condensate in the first water collection tank (511) to the second heat dissipation unit (40), and the second water conveying component (53) can... The condensate in the second water collection tank (512) can be transported to the second heat dissipation part (40); or, a third air outlet (15) is provided on the housing (10), the third air outlet (15) is connected to the first receiving cavity (11) and is arranged opposite to the heating end of the thermoelectric cooling component (33), the second ends of the first water supply component (52) and the second water supply component (53) are both arranged on the heating end, the first water supply component (52) can transport the condensate in the first water collection tank (511) to the heating end, and the second water supply component (53) can transport the condensate in the second water collection tank (512) to the heating end.

5. The projection device according to claim 4, characterized in that, The thermoelectric refrigeration assembly (33) includes a thermoelectric cooling chip (331) and a cold-end heat exchanger (332). The thermoelectric cooling chip (331) is disposed on the main body (31). A cooling surface is formed on the end of the thermoelectric cooling chip (331) near the air inlet cavity (3121). The cold-end heat exchanger (332) is disposed in the air inlet cavity (3121) and is in contact with the cooling surface. The cold-end heat exchanger (332) and the cooling surface of the thermoelectric cooling chip (331) together form the cooling end of the thermoelectric refrigeration assembly (33). The thermoelectric refrigeration assembly (33) also includes a first heat sink (333). A heating surface is formed on the end of the thermoelectric cooling chip (331) away from the air inlet cavity (3121). The first heat sink (333) is disposed in the first receiving cavity (11) and is in contact with the heating surface. The first heat sink (333) and the heating surface of the thermoelectric cooling chip (331) together form the heating end of the thermoelectric cooling assembly (33). The thermoelectric cooling assembly (33) also includes a first cooling fan (334). The first cooling fan (334) is disposed on the first heat sink (333) and is used to blow the air in the first receiving cavity (11) onto the first heat sink (333).

6. The projection device according to claim 4, characterized in that, The second heat dissipation part (40) includes a second heat sink (41), which is disposed in the first receiving cavity (11) and is used to dissipate heat from the light source; the second heat dissipation part (40) also includes a second cooling fan (42), which is disposed on the second heat sink (41) and is used to blow air from the first receiving cavity (11) onto the second heat sink (41).

7. The projection device according to claim 6, characterized in that, The water collection part (50) further includes a first hydrogel membrane, which is disposed on the second heat sink (41). The second ends of the first water conveying component (52) and the second water conveying component (53) are both disposed on the first hydrogel membrane. The first water conveying component (52) can transport the condensate in the first water collection tank (511) to the first hydrogel membrane, and the second water conveying component (53) can transport the condensate in the second water collection tank (512) to the first hydrogel membrane.

8. The projection device according to claim 5, characterized in that, The water collection part (50) further includes a second hydrogel membrane, which is disposed on the first heat sink (333). The second ends of the first water conveying component (52) and the second water conveying component (53) are both disposed on the second hydrogel membrane. The first water conveying component (52) can transport the condensate in the first water collection tank (511) to the second hydrogel membrane, and the second water conveying component (53) can transport the condensate in the second water collection tank (512) to the second hydrogel membrane.

Images