Projection device

Abstract

This application provides a projection device. The projection device includes a housing assembly, a first lens, and an electronic device. The housing assembly includes a wall and a first locking position extending from the inner wall of the wall toward the interior of the wall; the first lens is engaged with the first locking position, separating a first chamber and a second chamber of the wall; the electronic device is at least partially disposed in the second chamber; an opening is formed between the first lens and the inner wall of the wall, the opening connecting the first chamber and the second chamber, allowing heat generated by the electronic device to be transferred from the second chamber to the first chamber through the opening. By providing an opening on the housing assembly connecting the first and second chambers, this application allows heat generated by the electronic device in the second chamber to diffuse to the first chamber, thereby enabling the projection device to reach thermal equilibrium more quickly, avoiding prolonged high temperatures in the second chamber, extending the lifespan of the projection device, and improving the user experience.

Description

Technical Field

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

[0002] With the widespread adoption of display devices, users have increasingly diverse needs for display scenarios. For example, projection devices, which can project images anytime and anywhere, are very popular with users. As user demands increase, portability of projection devices is one of the design trends, which requires making projection devices more compact.

[0003] However, the smaller the projection device, the easier it is for the internal temperature to concentrate and the slower it dissipates. The projection device takes longer to reach thermal equilibrium, and some areas inside the projection device may remain at high temperatures for a long time, which can easily affect the performance and lifespan of the internal components. Moreover, the slow heat dissipation of the whole device can also cause the projection device to overheat, which will reduce the user experience. Summary of the Invention

[0004] This application addresses the shortcomings of existing methods by proposing a projection device that solves the technical problems of temperature concentration, slow diffusion, and long time for the entire device to reach thermal equilibrium in existing projection devices.

[0005] In a first aspect, embodiments of this application provide a projection device, including: a housing assembly, a first lens, and an electronic device;

[0006] The housing assembly includes a wall and a first locking key extending from the inner wall of the wall toward the interior of the wall;

[0007] The first lens is engaged with the first key, separating the first chamber and the second chamber of the wall.

[0008] The electronic device is at least partially located in the second chamber;

[0009] An opening is formed between the first lens and the inner wall of the wall body, and the opening connects the first chamber and the second chamber, so that the heat generated by the electronic device can be transferred from the second chamber to the first chamber through the opening.

[0010] Optionally, the electronic device includes:

[0011] The display panel is positioned parallel to the first lens.

[0012] Optionally, the projection device may also include: a heat sink;

[0013] A first slot communicating with the first chamber is provided on the wall;

[0014] The heat sink is embedded in the first bayonet, with one side of the heat sink facing the first chamber and the other side facing the external environment.

[0015] Optionally, the wall further includes a transition cavity connecting the opening and the first chamber;

[0016] The opening forms the first inlet and outlet of the transition cavity;

[0017] The second inlet and outlet of the transition cavity faces the first chamber;

[0018] The first entrance / exit is located on the plane of the first lens, and the plane of the second entrance / exit is at an angle to the plane of the first lens; the plane of the second entrance / exit is at least partially opposite to the side of the heat sink facing the first chamber.

[0019] The transition cavity is closed off from the area directly opposite the opening.

[0020] Optionally, the projection device further includes a centrifugal fan disposed inside the wall body;

[0021] The centrifugal fan outlet faces the second chamber and is located on the side of the display panel away from the first lens.

[0022] Optionally, the projection device further includes: a partition disposed inside the wall body, spaced apart from the display panel;

[0023] A first passage forms the second chamber between the display panel and the partition;

[0024] The centrifugal fan's outlet faces the first channel.

[0025] Optionally, the projection device further includes: a first heat sink;

[0026] The first radiator faces the centrifugal fan on one side and forms a second passage between the first radiator and the centrifugal fan to create a second chamber; the other side of the first radiator faces the external environment.

[0027] The air inlet of the centrifugal fan is at least partially opposite to the first heat sink and is connected to the second channel.

[0028] Optionally, the first radiator is connected to the heat sink.

[0029] Optionally, the projection device further includes: a first reflecting mirror disposed inside the wall;

[0030] The side of the centrifugal fan furthest from the first heat sink forms an angle with the display panel;

[0031] The first reflector is attached to the side of the centrifugal fan away from the first radiator.

[0032] Optionally, the projection device further includes: a light source disposed inside the wall, and a second heat sink with one end facing the light source and the other end facing the external environment;

[0033] The light source is located on the side of the separator away from the display panel, and the light-emitting surface of the light source faces the first reflector.

[0034] Optionally, the projection device further includes: a projection lens, embedded in the second bayonet of the housing assembly;

[0035] One end of the projection lens is pointed towards the first chamber, and the other end is pointed towards the external environment;

[0036] The light from the light source passes sequentially through the first reflector, the separator, the display panel, and the first lens before exiting onto the projection lens.

[0037] The beneficial technical effects of the technical solutions provided in this application include:

[0038] The housing assembly provides mounting space for various components within its walls. A first lens is mounted on a first locking position within the housing assembly, separating a first chamber and a second chamber. The edge of the first lens is not connected to the wall, creating a gap between the lens and the wall, forming an opening that connects the first and second chambers. This allows heat generated by the electronic devices in the second chamber to dissipate into the first chamber, enabling the projection device to reach thermal equilibrium quickly. This prevents the second chamber from maintaining a consistently high temperature, extending the projection device's lifespan and improving the user experience. Furthermore, the temperature in the first chamber rises slowly, maintaining a suitable operating temperature within the first chamber.

[0039] Additional aspects and advantages of this application will be set forth in Part II of the description which follows, and these will become apparent from the description or may be learned by practice of this application. Attached Figure Description

[0040] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0041] Figure 1 This is a schematic diagram of the structure of a projection device provided in an embodiment of this application;

[0042] Figure 2 This is a schematic diagram of the airflow direction in a projection device provided in an embodiment of this application;

[0043] Figure 3 for Figure 1 A magnified view of a section at point A in the middle;

[0044] Figure 4 for Figure 1 A magnified view of a section at point B in the middle;

[0045] Figure 5 An exploded view of a projection device provided in an embodiment of this application;

[0046] Figure 6 An exploded view of a projection device with hidden optical lenses provided in an embodiment of this application;

[0047] Figure 7 This is a cross-sectional schematic diagram of a projection device provided in an embodiment of this application.

[0048] Figure label:

[0049] 100 - Projection device;

[0050] 10 - Housing assembly;

[0051] 11-Wall;

[0052] 111 - First chamber; 112 - Second chamber; 1121 - First passageway; 1122 - Second passageway;

[0053] 113 - Transition cavity; 1131 - First entrance / exit; 1132 - Second entrance / exit; 114 - First bayonet;

[0054] 115 - Second bayonet; 116 - Inclined section;

[0055] 12-First keypad;

[0056] 20 - First lens; 30 - Electronic device; 31 - Display panel;

[0057] 40 - Opening; 50 - Heat sink;

[0058] 60 - Centrifugal fan; 61 - Air outlet; 62 - Air inlet;

[0059] 70 - Separator; 80 - First radiator; 90 - First reflector;

[0060] 101-Light source; 102-Second heat sink; 103-Projection lens; 104-Second lens. Detailed Implementation

[0061] The embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the embodiments described below with reference to the accompanying drawings are exemplary descriptions for explaining the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions of the embodiments of this application.

[0062] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. It should be understood that the term “comprising” as used in this application means the presence of the stated features, integers, steps, operations, elements, and / or components, but does not exclude implementations of other features, information, data, steps, operations, elements, components, and / or combinations thereof supported by this art. It should be understood that when we say an element is “connected” or “coupled” to another element, the element may be directly connected or coupled to the other element, or it may mean that the element and the other element are connected through an intermediate element. The term “and / or” as used herein refers to at least one of the items defined by the term; for example, “A and / or B” can be implemented as “A,” or as “B,” or as “A and B.”

[0063] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0064] The applicant's research found that projection devices are generally composed of a housing assembly and some components related to projection display. In order to make the projection device have good light efficiency, the inside of the projection device is generally a sealed space. When some components (such as electronic devices) are placed in the sealed space inside the housing assembly, the heat generation is severe and difficult to dissipate, and the whole machine takes a long time to reach thermal equilibrium.

[0065] Generally, the housing assembly has a first chamber and a second chamber that are isolated from each other. Electronic devices that generate heat are mostly located in or near the second chamber, resulting in a higher temperature in the second chamber. The first chamber, closer to the projection lens, contains almost no heat-generating electronic devices and has a lower temperature. However, in typical projection devices, the first and second chambers are completely separated. Therefore, a large amount of heat accumulates in the second chamber, making it difficult to dissipate. This can easily affect the performance and lifespan of electronic devices and also cause the projection device's housing assembly to overheat significantly, greatly reducing the user experience.

[0066] The projection device provided in this application is intended to solve the above-mentioned technical problems of the prior art.

[0067] The technical solution of this application and how it solves the above-mentioned technical problems are described in detail below with specific embodiments. It should be noted that the following embodiments can be referenced, borrowed, or combined with each other, and the same terms, similar features, and similar implementation steps in different embodiments will not be described again.

[0068] Please refer to Figure 1This application provides a projection device 100, including: a housing assembly 10, a first lens 20, and an electronic device 30.

[0069] The housing assembly 10 includes a wall 11 and a first keyway 12 extending from the inner wall of the wall 11 toward the interior of the wall 11.

[0070] The first lens 20 is inserted into the first key 12, separating the first chamber 111 and the second chamber 112 of the wall 11.

[0071] The electronic device 30 is at least partially disposed within the second chamber 112.

[0072] An opening 40 is formed between the first lens 20 and the inner wall of the wall 11. The opening 40 connects the first chamber 111 and the second chamber 112, so that the heat generated by the electronic device 30 is transferred from the second chamber 112 to the first chamber 111 through the opening 40.

[0073] In this embodiment, the wall 11 of the housing assembly 10 provides mounting space for various components. The first lens 20 is mounted on the first key position 12 of the housing assembly 10, separating the first chamber 111 and the second chamber 112. The edge of the first lens 20 is not connected to the wall 11, creating a gap between the first lens 20 and the wall 11, forming an opening 40. The opening 40 connects the first chamber 111 and the second chamber 112, allowing heat generated by the electronic device 30 in the second chamber 112 to dissipate to the first chamber 111. This helps the projection device 100 reach thermal equilibrium quickly, preventing the second chamber 112 from maintaining a high temperature for an extended period, thus extending the lifespan of the projection device 100 and improving the user experience. Furthermore, the temperature in the first chamber 111 rises slowly, meeting the required suitable temperature within the first chamber 111.

[0074] Optionally, there is a gap between the side edge of the first key 12 and the inner wall of the wall 11, so that when the first lens 20 is attached to the first key 12, an opening 40 is formed between the inner walls of the wall 11, thereby connecting the first chamber 111 with a lower temperature and the second chamber 112 with a higher temperature, so that the projection device 100 can reach thermal equilibrium as soon as possible.

[0075] Optionally, the first lens 20 is a Fresnel lens.

[0076] In some possible implementations, refer to Figure 5 The electronic device 30 includes:

[0077] The display panel 31 is arranged parallel to the first lens 20.

[0078] In this embodiment, the electronic device 30 may include a display panel 31, such as a liquid crystal display panel 31. When light from the light source 101 is dimmed and then incident on the liquid crystal display panel 31, the circuit board drives the pixels on the liquid crystal display panel 31 to turn on or off, generating an image, which is then projected through the projection lens 103 to achieve projection. Both the display panel 31 and the first lens 20 are flat. The display panel 31 and the first lens 20 are parallel and disposed in the second chamber 112, so that the light passing through the display panel 31 is dimmed directly by the first lens 20 before being incident on the projection lens 103. Furthermore, the display panel 31 and the first lens 20 are designed to have the same or similar size. In the direction parallel to the first lens 20, the display panel 31 and the first lens 20 occupy the same size, making the internal structure of the projection device 100 compact.

[0079] In some possible implementations, refer to Figure 5 The projection device 100 also includes a heat sink 50.

[0080] The wall 11 has a first slot 114 that communicates with the first chamber 111.

[0081] The heat sink 50 is embedded in the first bayonet 114, with one side of the heat sink 50 facing the first chamber 111 and the other side facing the external environment.

[0082] In this embodiment, a heat dissipation plate 50 is added to the first chamber 111. The heat dissipation plate 50 is plate-shaped and is inserted into the wall 11. The wall 11 itself is relatively thin, and the plate-shaped heat dissipation plate 50 is also relatively thin, so it basically does not occupy the space of the first chamber 111 and will not affect the size of the entire projection device 100. The heat dissipation plate 50 dissipates heat from the second chamber 112 into the first chamber 111 more quickly, and the temperature inside the first chamber 111 drops rapidly. As a result, the temperature at which the projection device 100 reaches thermal equilibrium is lower, that is, the overall temperature of the projection device 100 is lower.

[0083] Optionally, the wall 11 includes an inclined portion 116, a first bayonet 114 is formed on the inclined portion 116, and the heat dissipation plate 50 is also set in an inclined state, adapted to the angle of the inclined portion 116.

[0084] In some possible implementations, refer to Figure 2 and Figure 4 The wall 11 also includes a transition cavity 113 connecting the opening 40 and the first chamber 111.

[0085] Opening 40 forms the first inlet / outlet 1131 of transition cavity 113.

[0086] The second inlet / outlet 1132 of the transition cavity 113 faces the first chamber 111.

[0087] The first entrance / exit 1131 is located on the plane of the first lens 20, and the plane of the second entrance / exit 1132 forms an angle with the plane of the first lens 20. The plane of the second entrance / exit 1132 is at least partially opposite to the side of the heat sink 50 facing the first chamber 111.

[0088] The area directly opposite the transition cavity 113 and the opening 40 is closed.

[0089] In this embodiment, heat from the second chamber 112 is transferred from the opening 40 through the transition cavity 113 to the first chamber 111. The transition cavity 113 is equivalent to a chamber formed inside the wall 11. The two inlets and outlets of the transition cavity 113 (the first inlet / outlet 1131 and the second inlet / outlet 1132) are not opposite each other, but are at an angle. Furthermore, the area directly opposite the opening 40 (the first inlet / outlet 1131) on the inner wall of the transition cavity 113 is closed, and the plane where the second inlet / outlet 1132 is located is at least partially opposite to the heat sink 50. Therefore, when heat or hot air from the second chamber 112 reaches the transition cavity 113, it is blocked by the inner wall of the transition cavity 113 directly opposite the opening 40 and ejected from the second inlet / outlet 1132, flowing directly towards the heat sink 50, and can reach the heat sink 50 and be heat-exchanged by the heat sink 50 in a short time. In other words, before most of the hot air has diffused into the first chamber 111, it has been cooled down, so that the temperature inside the first chamber 111 will never be too high. As a result, the components inside the first chamber 111 have little or no impact, which can ensure the normal operation of the projection device 100.

[0090] refer to Figure 1 The opening number 40 also includes the first entrance / exit number 1131 within parentheses, meaning that opening 40 and the first entrance / exit 1131 are the same opening.

[0091] In some possible implementations, refer to Figure 2 The projection device 100 also includes a centrifugal fan 60 disposed inside the wall 11.

[0092] The air outlet 61 of the centrifugal fan 60 faces the second chamber 112 and is located on the side of the display panel 31 away from the first lens 20.

[0093] In this embodiment, the projection device 100 is also equipped with a centrifugal fan 60, which can circulate the hot air in the second chamber 112 and pre-heat the hot air in the second chamber 112 before it reaches the first chamber 111, thereby further reducing the temperature in the second chamber 112, reducing the time for the first chamber 111 and the second chamber 112 to reach thermal equilibrium, and reducing the temperature inside the projection device 100 when thermal equilibrium is reached.

[0094] In some possible implementations, refer to Figure 1 , Figure 2 and Figure 7 The projection device 100 also includes a partition 70 disposed inside the wall 11, spaced apart from the display panel 31.

[0095] A first channel 1121 forms a second chamber 112 between the display panel 31 and the partition 70.

[0096] The air outlet 61 of the centrifugal fan 60 faces the first channel 1121.

[0097] In this embodiment, one side of the partition 70 faces the display panel 31, and the space on the other side (i.e., the space where the light source 101 is located) is isolated from the first channel 1121. This can seal the partition 70 to the inside of the wall 11, so that the first channel 1121 is sealed relative to the space on the other side of the partition 70, and the heat generated by the display panel 31 is concentrated in the second chamber 112.

[0098] Moreover, the first channel 1121 of this application embodiment is directly opposite the air outlet 61 of the centrifugal fan 60, which can accelerate the airflow around the display panel 31 and thereby cool down the temperature in the second chamber 112.

[0099] Optionally, the display panel 31 is approximately parallel to the separator 70, or the display panel 31 and the separator 70 have a small angle. The specific design depends on the light path required for projection imaging, so that the light from the light source 101 passes through the separator 70 first and then shines on the display panel 31.

[0100] Optionally, the partition 70 can be glass, such as heat-insulating glass, which can limit the heat generated by the display panel 31 to the second chamber 112 as much as possible, reduce heat exchange between the display panel 31 and some components below the glass (such as the light source 101), and improve the heat dissipation efficiency of the display panel 31.

[0101] For some possible implementations, please refer to Figure 2 and Figure 5 The projection device 100 also includes a first heat sink 80.

[0102] The first radiator 80 faces the centrifugal fan 60 on one side and forms a second channel 1122 of the second chamber 112 between the first radiator 80 and the centrifugal fan 60. The other side of the first radiator 80 faces the external environment.

[0103] The air inlet 62 of the centrifugal fan 60 is at least partially opposite to the first heat sink 80 and is connected to the second channel 1122.

[0104] In this embodiment, the centrifugal fan 60 draws in air through its air inlet 62 and exhausts air through its air outlet 61. The first heat sink 80 is installed on one side of the centrifugal fan 60 and is positioned directly opposite the air inlet 62 of the centrifugal fan 60. This allows the heat sink to cool the air at the air inlet 62 of the centrifugal fan 60, resulting in a lower temperature of the air drawn in by the centrifugal fan 60. When the cooler air is exhausted from the centrifugal fan 60, it can exchange heat with the hot air in the first channel 1121, reducing the temperature in the first channel 1121 and thus cooling the display panel 31.

[0105] Figure 2 The diagram illustrates the air circulation path within the second chamber 112 of the projection device 100 under the action of the centrifugal fan 60, as well as the airflow direction between the second chamber 112 and the first chamber 111. Air discharged from the outlet 61 of the centrifugal fan 60 passes through the first channel 1121. Part of the air may directly enter the transition chamber 13, while another part flows between the first lens 20 and the display panel 31, reaching the second channel 1122. There, it is cooled by the first heat sink 80, then drawn in by the centrifugal fan 60 from the inlet 62 and discharged from the outlet 61, thus achieving air circulation within the second chamber 112.

[0106] Optionally, the end of the first channel 1121 away from the air outlet 61 of the centrifugal fan 60 is connected to the second channel 1122 to form an internal circulation air duct. When the hot air in the first channel 1121 passes through the second channel 1122, it is cooled by the first heat sink 80. The cooled air then enters the centrifugal fan 60 through the air inlet 62 and is discharged from the air outlet 61 of the centrifugal fan 60 back to the first channel 1121. This can achieve effective air circulation in the second chamber 112 and remove the heat generated by the display panel 31 during the air circulation process.

[0107] In some possible implementations, refer to Figure 6 The first radiator 80 is connected to the heat sink 50.

[0108] In this embodiment, the first radiator 80 can be connected to the heat sink 50. The first radiator 80 and the heat sink 50 can be an integrated heat dissipation structure, which is equivalent to adding a heat dissipation fin plate to the first radiator 80. The heat sink 50 and the first radiator 80 can share a heat dissipation system, and simultaneously realize two heat exchange scenarios: the heat sink 50 exchanges heat in the first chamber 111 with the cold air of the external environment, and the first radiator 80 exchanges heat in the second chamber 112 with the cold air of the external environment.

[0109] In some possible implementations, the projection device 100 further includes a first reflector 90 disposed inside the wall 11.

[0110] The side of the centrifugal fan 60 away from the first heat sink 80 forms an angle with the display panel 31.

[0111] The first reflector 90 is attached to the side of the centrifugal fan 60 away from the first radiator 80.

[0112] In this embodiment, the centrifugal fan 60 is installed obliquely inside the wall 11, adapting to the tilt angle of the first reflector 90. The first reflector 90 and the separator 70 are installed on the same side of the centrifugal fan 60, with the end of the separator 70 near the centrifugal fan 60 in contact with it and close to the first reflector 90, forming an acute angle between the first reflector 90 and the separator 70. The display panel 31 is spaced apart from the separator 70, and also forms an angle between the display panel 31 and the first reflector 90. Light from the light source 101 first hits the first reflector 90, changing the angle of the light, and then sequentially hits the separator 70, the display panel 31, and the first lens 20. This embodiment designs the positions of the centrifugal fan 60 and the first reflector 90 according to the direction of the light, making reasonable use of the internal space of the projection device 100, allowing the projection device 100 to be made more compact and portable.

[0113] In some possible implementations, refer to Figure 1 The projection device 100 also includes a light source 101 disposed inside the wall 11, and a second heat sink 102 with one end facing the light source 101 and the other end facing the external environment.

[0114] The light source 101 is located on the side of the separator 70 away from the display panel 31, and the light-emitting surface of the light source 101 faces the first reflector 90.

[0115] In this embodiment, the light source 101 is positioned within the angle formed by the separator 70 and the first reflector 90. The light-emitting surface of the light source 101 faces the reflective surface of the first reflector 90, allowing the light emitted by the light source 101 to be reflected by the first reflector 90 back to the separator 70. The second heat sink 102 dissipates heat from the light source 101. For example, the light source 101 includes a light-emitting element and a circuit board, with one side of the light-emitting element facing the first reflector 90 and the other side facing the circuit board. The second heat sink 102 is positioned on one side of the circuit board to dissipate heat from the circuit board.

[0116] Optionally, a second lens 104 is provided on the side of the separator 70 away from the display panel 31. Light from the light source 101 is reflected by the first reflector 90 to the second lens 104 and then emitted to the separator 70.

[0117] Optionally, the second lens 104 is a Fresnel lens.

[0118] Optionally, when the end of the separator 70 near the centrifugal fan 60 contacts the first reflector 90, a sealed space is formed between the separator 70, the first reflector 90 and the light-emitting surface of the light source 101, preventing the light emitted by the light source 101 from leaking out of the projection device 100, so that the light emitted by the light source 101 is directly reflected by the first reflector 90 to the separator 70, and then emitted to the display panel 31.

[0119] Optionally, when the end of the separator 70 near the centrifugal fan 60 only contacts the centrifugal fan 60 and not the first reflector 90, a sealed space is formed between the separator 70, the side of the centrifugal fan 60 that contacts the first reflector 90, the first reflector 90, and the light-emitting surface of the light source 101. This prevents the light emitted by the light source 101 from leaking out of the projection device 100, so that the light emitted by the light source 101 is directly reflected by the first reflector 90 to the separator 70, and then emitted to the display panel 31.

[0120] In some possible implementations, refer to Figure 1 and Figure 5 The projection device 100 also includes a projection lens 103, which is embedded in the second bayonet 115 of the housing assembly 10.

[0121] One end of the projection lens 103 faces the first chamber 111, and the other end faces the external environment.

[0122] The light from the light source 101 passes sequentially through the first reflector 90, the separator 70, the display panel 31, and the first lens 20 before being emitted to the projection lens 103.

[0123] In this embodiment, one end of the projection lens 103 faces the first chamber 111. The first chamber 111 has a large space and a relatively low temperature, which can ensure the normal operation of the projection lens 103.

[0124] Optionally, the projection device 100 further includes a second reflector (not shown in the figure). The second reflector is disposed in the first chamber 111 and is in contact with the inclined portion 116, so that the light from the light source 101 is reflected to the projection lens 103 after reaching the first lens 20 and being positioned by the second reflector.

[0125] By applying some embodiments of this application, at least the following beneficial effects can be achieved:

[0126] 1. In some embodiments, a gap exists between the first lens 20 and the wall 11, forming an opening 40. The opening 40 connects the first chamber 111 and the second chamber 112, allowing heat generated by the electronic device 30 in the second chamber 112 to dissipate to the first chamber 111. This enables the projection device 100 to reach thermal equilibrium quickly, preventing the second chamber 112 from maintaining a consistently high temperature for an extended period. This extends the lifespan of the projection device 100 and improves the user experience. Furthermore, the temperature in the first chamber 111 rises slowly, maintaining the desired temperature within the first chamber 111.

[0127] 2. In some embodiments, a heat dissipation plate 50 is added to the first chamber 111. The heat dissipation plate 50 is a plate-shaped object that is inserted into the wall 11. The wall 11 itself is relatively thin, and the plate-shaped heat dissipation plate 50 is also relatively thin, so it basically does not occupy the space of the first chamber 111 and will not affect the size of the entire projection device 100. The heat dissipation plate 50 dissipates heat from the second chamber 112 in the first chamber 111, allowing the heat in the first chamber 111 to be dissipated to the external environment more quickly. The temperature inside the first chamber 111 drops rapidly, resulting in a lower temperature when the projection device 100 reaches thermal equilibrium, that is, a lower overall temperature of the projection device 100.

[0128] 3. In some embodiments, heat from the second chamber 112 is transferred from the opening 40 through the transition cavity 113 to the first chamber 111. The transition cavity 113 is equivalent to a chamber formed inside the wall 11. The two inlets and outlets of the transition cavity 113 (the first inlet and outlet 1131 and the second inlet and outlet 1132) are not opposite each other, but are at an angle. Furthermore, the area directly opposite the opening 40 (the first inlet and outlet 1131) on the inner wall of the transition cavity 113 is closed, and the plane where the second inlet and outlet 1132 is located is at least partially opposite to the heat sink 50. Therefore, when heat or hot air from the second chamber 112 reaches the transition cavity 113, it is blocked by the inner wall of the transition cavity 113 directly opposite the opening 40 and ejected from the second inlet and outlet 1132, flowing directly towards the heat sink 50, and can reach the heat sink 50 and be heat-exchanged by the heat sink 50 in a short time. In other words, before most of the hot air has diffused into the first chamber 111, it has been cooled down, so that the temperature inside the first chamber 111 will never be too high. As a result, the components inside the first chamber 111 have little or no impact, which can ensure the normal operation of the projection device 100.

[0129] 4. In some embodiments, the projection device 100 is also provided with a centrifugal fan 60, which can circulate the hot air in the second chamber 112, pre-cool the hot air in the second chamber 112 before it reaches the first chamber 111, further reduce the temperature in the second chamber 112, reduce the time for the first chamber 111 and the second chamber 112 to reach thermal equilibrium, and reduce the temperature inside the projection device 100 when thermal equilibrium is reached.

[0130] In the description of this application, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate directions or positional relationships based on the exemplary directions or positional relationships shown in the accompanying drawings. They are used to facilitate the description or simplification of the embodiments of this application and are not intended to indicate or imply that the device or component 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.

[0131] 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0132] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0133] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0134] The above description is only a partial implementation of this application. It should be noted that for those skilled in the art, other similar implementation methods based on the technical concept of this application, without departing from the technical concept of this application, also fall within the protection scope of the embodiments of this application.

Claims

1. A projection device, characterized by include: A housing assembly includes a wall and a first locking key extending from the inner wall of the wall toward the interior of the wall; The first lens is inserted into the first key position to separate the first chamber and the second chamber of the wall; Electronic devices, at least partially disposed within the second chamber; An opening is formed between the first lens and the inner wall of the wall body, and the opening connects the first chamber and the second chamber, so that the heat generated by the electronic device is transferred from the second chamber to the first chamber through the opening; The electronic device includes: The display panel is arranged parallel to the first lens; The projection device further includes: a heat sink; The wall is provided with a first slot that communicates with the first chamber; The heat sink is embedded in the first bayonet, with one side of the heat sink facing the first chamber and the other side facing the external environment; The wall further includes a transition cavity connecting the opening and the first chamber; The opening forms the first inlet / outlet of the transition cavity; The second inlet / outlet of the transition cavity faces the first chamber; The first entrance / exit is located on the plane where the first lens is located, and the plane where the second entrance / exit is located forms an angle with the plane where the first lens is located; the plane where the second entrance / exit is located is at least partially opposite to the side of the heat sink facing the first chamber; The transition cavity is closed off from the area directly opposite the opening.

2. The projection device according to claim 1, characterized in that, The projection device further includes a centrifugal fan disposed inside the wall body; The air outlet of the centrifugal fan faces the second chamber and is located on the side of the display panel away from the first lens.

3. The projection device according to claim 2, characterized in that, The projection device further includes: a partition disposed inside the wall body, spaced apart from the display panel; A first passage is formed between the display panel and the partition to create the second chamber; The air outlet of the centrifugal fan faces the first channel.

4. The projection device according to claim 2, characterized in that, The projection device further includes: a first heat sink; One side of the first radiator faces the centrifugal fan and forms a second channel for the second chamber between the first radiator and the centrifugal fan; the other side of the first radiator faces the external environment. The air inlet of the centrifugal fan is at least partially opposite to the first radiator and communicates with the second channel.

5. The projection device according to claim 4, characterized in that, The first radiator is connected to the heat sink.

6. The projection device according to claim 4, characterized in that, The projection device further includes: a first reflecting mirror disposed inside the wall; The side of the centrifugal fan away from the first heat sink forms an angle with the display panel; The first reflector is attached to the side of the centrifugal fan away from the first radiator.

7. The projection device according to claim 6, characterized in that, The projection device further includes: a light source disposed inside the wall body, and a second heat sink with one end facing the light source and the other end facing the external environment; The light source is located on the side of the separator away from the display panel, and the light-emitting surface of the light source faces the first reflector.

8. The projection device according to claim 7, characterized in that, The projection device further includes a projection lens, which is embedded in the second bayonet of the housing assembly; One end of the projection lens faces the first chamber, and the other end faces the external environment; The light from the light source passes sequentially through the first reflector, the separator, the display panel, and the first lens before exiting onto the projection lens.

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