Projector

Abstract

This invention discloses a projector, relating to the field of projection equipment technology. The projector includes a housing assembly, a projection assembly, and a cooling device. Specifically, the housing assembly has a receiving cavity and an air duct. The projection assembly is disposed within the receiving cavity and includes a display screen. The air duct includes multiple branch channels that guide airflow from multiple sides of the display screen to the display screen. The cooling device is disposed within the receiving cavity to guide airflow through the air duct and remove heat from the display screen, thereby dissipating heat from the display screen. This configuration allows airflow to flow from multiple sides of the display screen through multiple branch channels, ensuring uniform airflow coverage of its surface. This comprehensive and integrated contact significantly improves heat dissipation consistency, effectively reduces temperature differences between different areas of the display screen, thus ensuring uniform color performance in all areas and ultimately improving the projector's display effect.

Description

Technical Field

[0001] This invention relates to the field of projection equipment technology, and in particular to a projector. Background Technology

[0002] In related technologies, the core of a projector generally includes a display screen, which is illuminated by a light source and the image is projected through a lens. However, projectors generate a lot of heat during operation. If the display screen temperature is too high, issues such as color distortion and brightness reduction may occur, but existing projectors do not have good heat dissipation capabilities for the display screen. Summary of the Invention

[0003] The main objective of this invention is to provide a projector that addresses the problem of poor heat dissipation of the display screen in existing projectors.

[0004] To achieve the above objectives, the projector proposed in this invention includes:

[0005] The housing assembly has a receiving cavity and an air duct;

[0006] A projection assembly is installed within the accommodating cavity. The projection assembly includes a display screen, and the air duct includes multiple branch channels that guide airflow from multiple sides of the display screen to the display screen.

[0007] An air-cooling device is installed inside the accommodating cavity, and the air-cooling device is used to guide airflow through the air duct.

[0008] In one embodiment, the display screen has a top edge, a bottom edge opposite to the top edge, and a left edge and a right edge disposed between the top edge and the bottom edge. The air duct includes a first branch channel that guides airflow to the top edge, a second branch channel that guides airflow to the left edge, and a third branch channel that guides airflow to the right edge.

[0009] In one embodiment, the housing assembly includes a housing, a bracket, and an air guide. The housing has the receiving cavity. The bracket and the air guide are disposed in the receiving cavity and enclose the housing to form the air duct. The air guide and the bracket enclose to form a first branch channel, a second branch channel, and a third branch channel. The projection component is disposed on the bracket.

[0010] In one embodiment, the air guide includes a cover and a plurality of partitions disposed on the cover. The plurality of partitions and the cover enclose a first flow channel, a second flow channel and a third flow channel. The first flow channel is connected to the first branch channel, and the second flow channel and the third flow channel are connected to the second branch channel and the third branch channel, respectively.

[0011] In one embodiment, the air guide further includes a plurality of guide plates spaced apart from each other within the first flow channel, the guide plates being curved and extended along the length of the first flow channel.

[0012] In one embodiment, at least a portion of the guide plate is projected along the length of the first flow channel onto the adjacent guide plate;

[0013] And / or, the cover is provided with a baffle plate on the side of the air deflector near the display screen for guiding airflow to the top edge of the display screen;

[0014] And / or, the surface of the guide plate is provided with an adsorption layer, which is used to adsorb dust entering the first flow channel.

[0015] In one embodiment, the bracket has an installation cavity, the projection component is disposed in the installation cavity, the air guide and the bracket enclose an air outlet, the air outlet communicates with the installation cavity through the first branch channel, the second branch channel and the third branch channel, the bracket has an exhaust port that communicates with the installation cavity, and the air-cooling device is disposed at the exhaust port to allow airflow from the air outlet to the exhaust port.

[0016] In one embodiment, the bracket is provided with a first air vent communicating with the first branch channel, a second air vent communicating with the second branch channel, and a third air vent communicating with the third branch channel. The top edge of the display screen is positioned facing the first air vent, and the left and right sides are positioned facing the second and third air vents, respectively.

[0017] In one embodiment, the first air vent extends along the length of the top edge of the display screen, and the second and third air vents are located on opposite sides of the display screen along the length of the top edge, with the second and third air vents extending along the length of the left and right sides of the display screen, respectively.

[0018] And / or, the exhaust vent faces the bottom edge of the display screen and is positioned opposite to the first vent.

[0019] In one embodiment, the projector further includes a filter disposed at the air outlet;

[0020] And / or, the bracket includes a first bracket and a second bracket, the first bracket and the second bracket enclose the mounting cavity, the air guide is disposed on the first bracket and forms the air supply port, and the air exhaust port is disposed on the second bracket;

[0021] And / or, the air duct extends along the length of the outer casing, and the outer casing has an air inlet and an air outlet at both ends along the length, the air outlet is connected to the air inlet, and the air outlet is connected to the air outlet.

[0022] The present invention also proposes an air guide for use in a projector in any of the foregoing embodiments, the projector having an air duct including multiple branch channels, the air guide comprising:

[0023] Cover;

[0024] Multiple partitions are disposed on the cover and enclose the cover to form a first flow channel, a second flow channel and a third flow channel, the first flow channel and the second flow channel and the third flow channel are respectively used to communicate with the multiple branch channels;

[0025] Multiple guide plates are disposed within the first flow channel and spaced apart from each other. The guide plates extend in a curved manner along the length direction of the first flow channel, and at least a portion of the guide plate is projected onto the adjacent guide plate in the length direction of the first flow channel.

[0026] In one embodiment, a baffle plate is provided on one side of the guide plate for guiding airflow to the branch channel;

[0027] And / or, the surface of the guide plate is provided with an adsorption layer, which is used to adsorb dust entering the first flow channel.

[0028] The projector proposed in this invention includes a housing assembly, a projection assembly, and a cooling device. Specifically, the housing assembly has a receiving cavity and an air duct. The projection assembly is disposed within the receiving cavity and includes a display screen. The air duct includes multiple branch channels that guide airflow from multiple sides of the display screen to the display screen. The cooling device is disposed within the receiving cavity to guide airflow through the air duct and remove heat from the display screen, thereby dissipating heat from the display screen. This configuration allows airflow to flow from multiple sides of the display screen through multiple branch channels, ensuring uniform airflow coverage of its surface. This comprehensive and integrated contact significantly improves heat dissipation consistency, effectively reduces temperature differences between different areas of the display screen, thus ensuring uniform color performance in all areas and ultimately improving the projector's display effect. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, 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 the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of a projector embodiment provided by the present invention;

[0031] Figure 2 This is a schematic diagram of the disassembled structure of an embodiment of the projector provided by the present invention;

[0032] Figure 3 This is a front view of an embodiment of the projector provided by the present invention;

[0033] Figure 4 for Figure 3 A cross-sectional view along the AA direction;

[0034] Figure 5 for Figure 3 Cross-sectional view along the BB direction;

[0035] Figure 6 This is a schematic diagram of the air guide and bracket in one embodiment of the projector provided by the present invention;

[0036] Figure 7 This is a schematic diagram of a structure of an embodiment of the air guide provided by the present invention;

[0037] Figure 8 This is a top view of an embodiment of the air guide provided by the present invention;

[0038] Figure 9 This is a schematic diagram showing the disassembled structure of the bracket and projection assembly in one embodiment of the projector provided by the present invention;

[0039] Figure 10 This is a schematic diagram of the support structure in one embodiment of the projector provided by the present invention.

[0040] Explanation of icon numbers:

[0041] 100. Projector; 1. Housing assembly; 1a. Air inlet; 1b. Air outlet; 11. Receiving cavity; 12. Air duct; 12a. First branch channel; 12b. Second branch channel; 12c. Third branch channel; 12d. Air supply outlet; 12e. Air exhaust outlet; 13. Housing; 14. Bracket; 14a. First air outlet; 14b. Second air outlet; 14c. Third air outlet; 14d. Mounting cavity; 14e. Slot; 141. First bracket; 142. Second bracket; 15. Air guide; 151. Cover; 152. Partition; 15a. First flow channel; 15b. Second flow channel; 15c. Third flow channel; 153. Guide plate; 153a. Bending section; 154. Baffle plate; 2. Projection assembly; 21. Display screen; 211. Top edge; 212. Bottom edge; 213. Left side; 214. Right side; 22. Rear film lens; 23. Glass plate; 24. Front film lens; 25. Light source; 26. Lens; 3. Air cooling device; 4. Filter.

[0042] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0043] 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 a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0044] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0045] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text implies three parallel solutions. For example, "A and / or B" includes solution A or solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0046] In existing projectors, airflow is typically guided by a fan to dissipate heat from the display screen. However, the projector casing is usually designed with a single air duct. The airflow from one side of the display screen to the opposite side is concentrated in the central area of ​​the display screen, while the airflow is less in the areas near the other two sides. This results in a large temperature difference between the central area and the side areas of the display screen, causing bright spots, dark spots, color spots, or uneven colors in some areas, thus reducing the display effect of the projector.

[0047] To address the above problems, the present invention proposes a projector 100.

[0048] Please see Figures 1 to 5In one embodiment of the present invention, the projector 100 includes a housing assembly 1, a projection assembly 2, and a cooling device 3. Specifically, the housing assembly 1 has a receiving cavity 11 and an air duct 12. The projection assembly 2 is disposed within the receiving cavity 11 and includes a display screen 21. The air duct 12 includes multiple branch channels that guide airflow from multiple sides of the display screen 21 to the display screen 21. The cooling device 3 is disposed within the receiving cavity 11 to guide airflow through the air duct 12 and remove heat from the display screen 21, thereby dissipating heat from the display screen 21. With this configuration, airflow can flow from multiple sides of the display screen 21 to the display screen 21 through multiple branch channels, so that the airflow evenly covers its surface. This full and overall contact method significantly improves the consistency of heat dissipation, effectively reduces the temperature difference between different areas of the display screen 21, thereby ensuring uniform color performance in each area and ultimately improving the display effect of the projector 100.

[0049] It should be noted that in this embodiment, the overall shape of the housing assembly 1 is a cuboid structure, the accommodating cavity 11 extends along the length of the housing assembly 1, the projection assembly 2 is disposed in the accommodating cavity 11, and the air duct 12 is configured to communicate with the accommodating cavity 11 so that the airflow enters the accommodating cavity 11 and then enters the air duct 12 and flows to the display screen 21; or, in some other embodiments of the present invention, the air duct 12 may also pass through the accommodating cavity 11 and form a gap with the accommodating cavity 11, the display screen 21 is located in the accommodating cavity 11 and is at least partially disposed in the air duct 12, the airflow passes through the air duct 12 but does not enter the accommodating cavity 11, and can still achieve heat dissipation of the display screen 21.

[0050] Furthermore, in this embodiment, the air duct 12 is arranged along the length direction of the housing assembly 1. In some other embodiments of the present invention, the air duct 12 may also be arranged along the width direction of the housing assembly 1 so that the external air forms an airflow under the action of the air cooling device 3 and enters the air duct 12. Based on this, whether the accommodating cavity 11 and the air duct 12 are connected and the structure of the air duct 12 are not specifically limited, and can be set according to actual needs.

[0051] The air duct 12 has multiple branch channels that are spaced out inside. Each branch channel can generate airflow, and different branch channels correspond to different sides of the display screen 21. The generated airflow blows from different sides of the display screen 21 to the surface of the display screen 21 for heat dissipation, thereby improving the uniformity of heat dissipation. For example, taking a rectangular display screen 21 as an example, to control the airflow from two, three, or four sides of the display screen 21, two, three, or four branch channels can be set to correspond to different sides of the display screen 21 respectively. Of course, each side of the display screen 21 can be provided with two or more branch channels. The number of branch channels is not specifically limited here.

[0052] The air-cooling device 3 includes, but is not limited to, conventional fans, piezoelectric fans, and other devices used to generate airflow. The air-cooling device 3 is located in the accommodating cavity 11 and is set in relation to the air duct 12 to guide the airflow through the air duct 12. Its structure is not specifically limited here.

[0053] like Figure 4 , Figure 5 and Figure 9 As shown, in one embodiment, the display screen 21 has a top edge 211, a bottom edge 212 opposite to the top edge 211, and a left edge 213 and a right edge 214 disposed between the top edge 211 and the bottom edge 212. The air duct 12 includes a first branch channel 12a that guides airflow to the top edge 211, a second branch channel 12b that guides airflow to the left edge 213, and a third branch channel 12c that guides airflow to the right edge 214. It should be noted that in this embodiment, the display screen 21 is rectangular. The airflow in the first branch channel 12a flows from the top edge 211 to the bottom edge 212 of the display screen 21. The airflow in the second branch channel 12b and the third branch channel 12c flows from the left edge 213 and the right edge 214 of the display screen 21 in opposite directions, respectively. After the branch airflows merge, they flow out from the bottom edge 212. The airflow in the air duct 12 evenly covers the surface of the display screen 21, which helps to reduce the temperature difference between the middle area and the two side areas of the display screen 21, thereby improving the display effect.

[0054] like Figures 4 to 6 As shown, in one embodiment, the housing assembly 1 includes a housing 13, a support 14, and an air guide 15, in conjunction with reference to the reference. Figure 2 The outer casing 13 has a receiving cavity 11. A bracket 14 and an air guide 15 are disposed in the receiving cavity 11 and enclose the outer casing 13 to form an air duct 12. The air guide 15 and the bracket 14 enclose a first branch channel 12a, a second branch channel 12b, and a third branch channel 12c. The projection assembly 2 is disposed on the bracket 14. It is understood that the bracket 14 facilitates the installation and fixation of the projection assembly 2. The air guide 15 and the bracket 14 enclose a portion of the air duct 12, defining the first branch channel 12a, the second branch channel 12b, and the third branch channel 12c to guide airflow along different sides of the display screen 21 towards the display screen 21. The bracket 14 itself is a supporting structural component, and the air guide 15 is also part of the structure. Combining the two constitutes the air duct 12, effectively giving the structural component a dual function. This avoids the need for additional independent air guide ducts, simplifies the assembly process, and saves internal space.

[0055] like Figure 7As shown, in one embodiment, the air guide 15 includes a cover 151 and a plurality of partitions 152 disposed on the cover 151. The plurality of partitions 152 and the cover 151 enclose a first flow channel 15a, a second flow channel 15b, and a third flow channel 15c. The first flow channel 15a is connected to a first branch channel 12a, and the second flow channel 15b and the third flow channel 15c are connected to the second branch channel 12b and the third branch channel 12c, respectively. It can be understood that the air guide 15 is divided into a first flow channel 15a, a second flow channel 15b, and a third flow channel 15c. The second flow channel 15b and the third flow channel 15c are located on opposite sides of the first flow channel 15a, so as to divide the airflow entering the air guide 15 into three streams, which enter the first branch channel 12a, the second branch channel 12b, and the third branch channel 12c, respectively. The air guide 15 can control the airflow entering each branch channel to achieve the corresponding heat dissipation effect.

[0056] Specifically, after the airflow is diverted by the air guide 15, the airflow from the first branch channel 12a to the top edge 211 of the display screen 21 is 50%–70%, while the airflow from the second branch channel 12b to the left edge 213 of the display screen 21 and from the third branch channel 12c to the right edge 214 of the display screen 21 are 15%–25% respectively. In one embodiment of the present invention, the air guide 15 controls the airflow of the first branch channel 12a to be 60%, and the airflow of the second branch channel 12b and the third branch channel 12c to be 20% each, so that the temperature difference between different areas of the display screen 21 is relatively small. The airflow diversion of the air guide 15 is not specifically limited here and can be adaptively set according to the heat dissipation requirements.

[0057] like Figure 7 and Figure 8 As shown, in one embodiment, the air guide 15 further includes a plurality of guide plates 153 spaced apart within the first flow channel 15a. The guide plates 153 extend in a curved manner along the length of the first flow channel 15a. It should be noted that the plurality of guide plates 153 are arranged at intervals along the width of the first flow channel 15a to divide the first flow channel 15a into multiple smaller flow channels. The plurality of guide plates 153 divide the airflow into multiple smaller airflow streams, making its flow more stable and orderly. The guide plates 153 can guide the airflow to the display screen 21 in a dispersed manner, avoiding heat dissipation dead zones and ensuring that the display screen 21 is not damaged or its performance degraded (uneven color, bright spots, dark spots, etc.) due to localized overheating. Furthermore, the smooth, curved guide plates 153 can guide the airflow to change direction smoothly, greatly reducing airflow separation and impact, thereby effectively reducing high-frequency wind noise.

[0058] like Figure 8As shown, in one embodiment, at least a portion of the guide plate 153 is projected along the length of the first flow channel 15a onto the adjacent guide plate 153. Specifically, the guide plate 153 extends in a curved manner and forms a bend 153a, such as... Figure 8 As shown by the multiple dashed lines, these lines extend from the highest point of the protrusion of the bend 153a along the length of the first flow channel 15a and land on the adjacent guide plate 153. This arrangement allows multiple guide plates 153 to block the light emitted by the projection assembly 2, preventing light leakage from the outside of the projector 100 and improving the user experience. Furthermore, after the airflow enters the first flow channel 15a, it first contacts the guide plate 153. The change in airflow direction reduces impact and prevents the airflow from directly entering the interior, further controlling wind noise.

[0059] like Figure 4 and Figure 8 As shown, in one embodiment, the cover 151 has a baffle 154 on the side of the air deflector 153 near the display screen 21 for guiding airflow to the top edge 211 of the display screen 21. Figure 4 and Figure 7 As shown, the wind deflector 154 is located on the side of the air deflector 153 closest to the display screen 21 and is parallel to and spaced apart from the display screen 21. Figure 4 The middle arrow indicates the path of the airflow along the air duct 12. After entering the first branch channel 12a, the airflow flows to the baffle 154. The baffle 154 changes the direction of the airflow, causing it to turn downwards and flow from the top edge 211 to the bottom edge 212 of the display screen 21, which can improve the heat dissipation effect of the display screen 21.

[0060] In one embodiment, an adsorption layer is provided on the surface of the guide plate 153. The adsorption layer is used to adsorb dust entering the first flow channel 15a. It should be noted that, in this solution, the adsorption layer includes, but is not limited to, an electrostatic adsorption film, a dustproof adhesive, a surface microstructure coating, etc., as long as it can adsorb the dust entering the air guide 15 onto the guide plate 153. No specific limitation is made here. This structure is used to prevent dust from entering the mounting cavity 14d and affecting the projection component 2, thus ensuring the display effect of the projected image.

[0061] In one implementation, such as Figure 7 and Figure 8 As shown, at least a portion of the guide plate 153 of the air guide 15 is projected onto the adjacent guide plate 153 along the length of the first flow channel 15a. A baffle plate 154 is provided on one side of the guide plate 153 to guide the airflow to the top edge 211 of the display screen 21. An adsorption layer is also provided on the surface of the guide plate 153. The adsorption layer is used to adsorb dust entering the first flow channel 15a. The above structure can be selectively combined according to product requirements, and no specific limitation is made here.

[0062] like Figure 4 , Figure 5 , Figure 9 and Figure 10 As shown, in one embodiment, the bracket 14 has a mounting cavity 14d, the projection component 2 is disposed in the mounting cavity 14d, and the air guide 15 and the bracket 14 enclose an air supply port 12d. The air supply port 12d communicates with the mounting cavity 14d through a first branch channel 12a, a second branch channel 12b, and a third branch channel 12c. The bracket 14 has an exhaust port 12e communicating with the mounting cavity 14d, and the air-cooling device 3 is disposed at the exhaust port 12e to allow airflow from the air supply port 12d to the exhaust port 12e. It is understood that the openings of the air supply port 12d and the exhaust port 12e are relatively small, and the portion of the air duct 12 located on the air guide 15 and the bracket 14 is relatively narrow. The air-cooling device 3 is disposed at the exhaust port 12e to form a suction-type heat dissipation structure, which helps to increase the airflow velocity, improve the heat dissipation efficiency of the display screen 21, and also helps to control the power consumption and noise of the air-cooling device 3.

[0063] like Figure 4 , Figure 5 , Figure 9 and Figure 10 As shown, in one embodiment, the bracket 14 is provided with a first air vent 14a communicating with the first branch channel 12a, a second air vent 14b communicating with the second branch channel 12b, and a third air vent 14c communicating with the third branch channel 12c. The top edge 211 of the display screen 21 faces the first air vent 14a, and the left side 213 and right side 214 face the second air vent 14b and the third air vent 14c, respectively. It can be understood that the first air vent 14a, the second air vent 14b, and the third air vent 14c are arranged at intervals around the periphery of the display screen 21 and face the top edge 211, the left side 213, and the right side 214 of the display screen 21, respectively. By setting the first air vent 14a, the second air vent 14b, and the third air vent 14c, the direction of the three airflows in the first branch channel 12a, the second branch channel 12b, and the third branch channel 12c entering the mounting cavity 14d can be controlled.

[0064] like Figure 9 and Figure 10As shown, in one embodiment, the first air vent 14a extends along the length of the top edge 211 of the display screen 21, and the second air vent 14b and the third air vent 14c are located on opposite sides of the display screen 21 along the length of the top edge 211, respectively. The second air vent 14b and the third air vent 14c extend along the length of the left side 213 and the right side 214 of the display screen 21, respectively. It can be understood that, in order to increase the airflow coverage area on each side of the display screen 21, the first air vent 14a faces the top edge 211 of the display screen 21 and extends along the length of the top edge 211, while the second air vent 14b and the third air vent 14c face the left side 213 and the right side 214 of the display screen 21, respectively. This allows the three airflows entering the mounting cavity 14d to cover more of the surface of the display screen 21, avoiding excessive local temperature differences.

[0065] like Figure 4 , Figure 9 and Figure 10 As shown, in one embodiment, the exhaust vent 12e faces the bottom edge 212 of the display screen 21 and is positioned opposite to the first vent 14a, so that the airflow of the first branch channel 12a flows from the top edge 211 to the bottom edge 212 of the display screen 21. It can be understood that the opposite arrangement of the first vent 14a and the exhaust vent 12e can form a short and straight channel with low wind resistance and smooth airflow. When achieving the same heat dissipation effect, the air-cooling device 3 can operate at a lower speed. The airflow flows through the display screen 21 through the shortest path and is then discharged from the mounting cavity 14d, which can reduce heat accumulation.

[0066] like Figures 4 to 6 As shown, in one embodiment, the projector 100 further includes a filter 4 disposed at the air outlet 12d. It is understood that by providing the filter 4 at the air outlet 12d to filter dust, dust is prevented from entering the interior and interfering with the display. Furthermore, the filter 4 has a certain buffering effect on the airflow, which can reduce the noise generated by airflow collision.

[0067] like Figure 9 and Figure 10 As shown, in one embodiment, the bracket 14 includes a first bracket 141 and a second bracket 142, which together form a mounting cavity 14d. An air guide 15 is disposed on the first bracket 141 and forms an air inlet 12d, and an air outlet 12e is disposed on the second bracket 142. Figure 10 As shown, the air guide 15 is located on the side of the first bracket 141 away from the second bracket 142 and forms an air supply port 12d. The air exhaust port 12e is located on the side of the second bracket 142 away from the air exhaust port 12e. Figure 4It can be seen that the air-cooling device 3 is located on the side of the second bracket 142 away from the first bracket 141 and is set in relation to the exhaust port 12e. This arrangement makes the component structure compact, which helps to reduce the size of the projector 100.

[0068] Furthermore, by engaging the first bracket 141 with the second bracket 142, the projection component 2 can be positioned and installed in a limited manner, improving the product assembly efficiency. Figure 10 As shown, the side wall of the mounting cavity 14d is provided with a plurality of spaced slots 14e for mounting the left side 213 and the right side 214 of the display screen 21. The two slots 14e are connected to the second air vent 14b and the third air vent 14c respectively. The width of the second air vent 14b and the width of the third air vent 14c are greater than the width of the slots 14e, so that the airflow can flow through the front and rear surfaces of the display screen 21, further improving the heat dissipation effect.

[0069] like Figure 4 As shown, in one embodiment, the air duct 12 extends along the length of the outer casing 13. The outer casing 13 has an air inlet 1a and an air outlet 1b at both ends along its length. The air supply outlet 12d communicates with the air inlet 1a, and the exhaust outlet 12e communicates with the air outlet 1b. It is understood that with this configuration, the air-cooling device 3 can guide airflow from the front end of the housing assembly 1 where the lens 26 is located into the outer casing 13, and exhaust hot air from the rear end of the outer casing 13. This avoids the exhaust airflow disturbing dust and forming light spots under the illumination of the light emitted from the lens 26, thus affecting the user's viewing experience.

[0070] In one embodiment of the present invention, the projection assembly 2 includes a lens 26, a front film lens 24, a display screen 21, a glass plate 23, a rear film lens 22, and a light source 25 arranged sequentially along the length of the outer casing 13. The light source 25 focuses light through a light box and illuminates the rear film lens 22 and the glass plate 23 to project the image on the display screen 21 onto the outside through the front film lens 24 and the lens 26. The glass plate 23 is used to block the heat generated by the light source 25 from affecting the display screen 21. The front film lens 24, the display screen 21, the glass plate 23, and the rear film lens 22 form gaps between each other. The airflow of the first branch channel 12a can pass through the front and rear surfaces of the display screen 21 to remove heat from the display screen 21 and thus control the temperature difference in different areas of the display screen 21.

[0071] The present invention also proposes an air guide 15, applied to the projector 100 in any of the foregoing embodiments. The projector 100 has an air duct 12, which includes multiple branch channels. The air guide 15 includes:

[0072] Cover 151;

[0073] Multiple partitions 152 are disposed on the cover 151 and enclose the cover 151 to form a first flow channel 15a, a second flow channel 15b and a third flow channel 15c. The first flow channel 15a, the second flow channel 15b and the third flow channel 15c are respectively used to communicate with multiple branch channels.

[0074] Multiple guide plates 153 are disposed within the first flow channel 15a and spaced apart from each other. The guide plates 153 are curved and extended along the length direction of the first flow channel 15a. At least a portion of the guide plate 153 is projected onto the adjacent guide plate 153 in the length direction of the first flow channel 15a.

[0075] In one embodiment, a baffle plate 154 for guiding airflow to a branch channel is provided on one side of the guide plate 153; and / or, an adsorption layer is provided on the surface of the guide plate 153 for adsorbing dust entering the first flow channel 15a.

[0076] The above description is merely an exemplary embodiment of the present invention and does not limit the scope of protection of the present invention. Any equivalent structural transformations made based on the technical concept of the present invention and the contents of the specification and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present invention.

Claims

1. A projector, characterized in that, include: The housing assembly includes an outer shell, a support, and an air guide, wherein the outer shell has a receiving cavity, and the support and the air guide are disposed in the receiving cavity and enclose the outer shell to form an air duct; A projection assembly is mounted on the bracket. The projection assembly includes a display screen having a top edge, a bottom edge opposite to the top edge, and a left edge and a right edge disposed between the top edge and the bottom edge. The air duct includes a first branch channel that guides airflow to the top edge, a second branch channel that guides airflow to the left edge, and a third branch channel that guides airflow to the right edge. An air-cooling device is installed inside the accommodating cavity and located on the side of the bracket away from the air guide. The air-cooling device is used to guide airflow through the air duct. The air guide includes a cover and a plurality of partitions disposed on the cover. The plurality of partitions and the cover enclose a first flow channel, a second flow channel and a third flow channel. The first flow channel is connected to a first branch channel. The second flow channel and the third flow channel are connected to the second branch channel and the third branch channel, respectively. The second flow channel and the third flow channel are located on opposite sides of the first flow channel. The air guide also includes a plurality of guide plates disposed at intervals within the first flow channel. The guide plates are curved and extend along the length direction of the first flow channel. At least a portion of the guide plate is projected onto the adjacent guide plate in the length direction of the first flow channel.

2. The projector as described in claim 1, characterized in that, The cover is provided with a baffle plate on the side of the guide plate near the display screen to guide airflow to the top edge of the display screen; And / or, the surface of the guide plate is provided with an adsorption layer, which is used to adsorb dust entering the first flow channel.

3. The projector as described in claim 1 or 2, characterized in that, The bracket has an installation cavity, the projection component is located in the installation cavity, the air guide and the bracket enclose an air outlet, the air outlet is connected to the installation cavity through the first branch channel, the second branch channel and the third branch channel, the bracket has an exhaust port connected to the installation cavity, and the air cooling device is located at the exhaust port to allow airflow from the air outlet to the exhaust port.

4. The projector as described in claim 3, characterized in that, The bracket is provided with a first air vent connected to the first branch channel, a second air vent connected to the second branch channel, and a third air vent connected to the third branch channel. The top edge of the display screen is set towards the first air vent, and the left and right sides are set towards the second air vent and the third air vent, respectively.

5. The projector as described in claim 4, characterized in that, The first air vent extends along the length of the top edge of the display screen, and the second and third air vents are located on opposite sides of the display screen along the length of the top edge, respectively extending along the length of the left and right sides of the display screen. And / or, the exhaust vent faces the bottom edge of the display screen and is positioned opposite to the first vent.

6. The projector as described in claim 4, characterized in that, The projector also includes a filter, which is disposed at the air outlet; And / or, the bracket includes a first bracket and a second bracket, the first bracket and the second bracket enclose the mounting cavity, the air guide is disposed on the first bracket and forms the air supply port, and the air exhaust port is disposed on the second bracket; And / or, the air duct extends along the length of the outer casing, and the outer casing has an air inlet and an air outlet at both ends along the length, the air outlet is connected to the air inlet, and the air outlet is connected to the air outlet.

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