Vehicle-mounted projection device and vehicle

Abstract

The embodiment of the application provides a kind of vehicle-mounted projection equipment and vehicle, it is related to vehicle-mounted projection technical field.The vehicle-mounted projection equipment includes: shell, including top plate, bottom plate and the side plate extending along height direction, top plate and bottom plate are oppositely arranged, top plate, bottom plate and side plate enclose the accommodating space of inside hollow, wherein top plate is used to fix vehicle-mounted projection equipment;Air inlet is provided on side plate, and air outlet is provided on bottom plate;Projection module is installed in accommodating space, and can be projected by shell;At least one radiator is installed in accommodating space, and radiator is correspondingly arranged with air inlet;At least one cooling fan is installed in accommodating space, and is arranged with the dislocation of radiator, and is correspondingly arranged with air outlet, and the air outlet direction of cooling fan is towards air outlet.Using the vehicle-mounted projection equipment, the noise can be reduced while guaranteeing the heat dissipation performance of vehicle-mounted projection equipment.

Description

Technical Field

[0001] This application relates to the field of vehicle-mounted projection technology, and in particular to a vehicle-mounted projection device and vehicle. Background Technology

[0002] Currently, common vehicle-mounted projection devices include a housing and a cooling fan and projection module housed within the housing. The cooling fan is typically installed vertically along the height of the vehicle-mounted projection device, so that its exhaust direction is towards the side panel extending along the height of the device.

[0003] As in-vehicle projection devices continue to develop, the height of existing in-vehicle projection devices is gradually decreasing. The cooling fan is limited by the height of the in-vehicle projection device, so only cooling fans with smaller side lengths can be selected to avoid the cooling fan's height exceeding the height of the in-vehicle projection device's casing. Thus, as the side length decreases, the available cooling fan size also continues to shrink.

[0004] However, smaller cooling fans result in insufficient airflow, making it difficult for them to meet the cooling requirements of in-vehicle projection devices. Therefore, current technology, to ensure adequate cooling for in-vehicle projection devices, can only increase the fan speed. However, higher fan speeds lead to increased noise from the cooling fan. Utility Model Content

[0005] The purpose of this application is to provide an in-vehicle projection device and a vehicle, so as to reduce noise while ensuring the heat dissipation performance of the in-vehicle projection device. The specific technical solution is as follows:

[0006] This application provides a vehicle-mounted projection device, including: a housing, comprising a top plate, a bottom plate, and side plates extending along the height direction, wherein the top plate and the bottom plate are disposed opposite to each other, and the top plate, the bottom plate, and the side plates enclose an internally hollow accommodating space;

[0007] An air inlet is provided on the side panel, and an air outlet is provided on the bottom plate;

[0008] A projection module is installed within the accommodating space and can project images through the outer casing;

[0009] At least one radiator is installed within the receiving space, and the radiator is arranged corresponding to the air inlet;

[0010] At least one cooling fan is installed in the receiving space and is offset from the heat sink and is positioned corresponding to the air outlet, with the air outlet direction of the cooling fan facing the air outlet.

[0011] In some embodiments of this application, a portion of the radiator overlaps with the cooling fan along the height direction of the vehicle-mounted projection device.

[0012] In some embodiments of this application, the distance between the overlapping portion of the radiator and the cooling fan along the height direction of the vehicle-mounted projection device is not less than 5mm.

[0013] In some embodiments of this application, the number of cooling fans is multiple;

[0014] The top plate is provided with a windbreak structure extending toward the bottom plate, the windbreak structure being used to separate the upper area between two adjacent cooling fans along the boundary of the cooling fans.

[0015] In some embodiments of this application, a protective net is provided on the base plate at a position corresponding to the air outlet, for isolating the cooling fan located at the air outlet from the external environment.

[0016] In some embodiments of this application, the protective net is a metal structure used to shield electromagnetic waves.

[0017] In some embodiments of this application, the projection module is centrally located within the housing, and two heat sinks are provided, each distributed on both sides of the projection module;

[0018] The cooling fans are provided in four units and are evenly distributed on both sides of the projection module.

[0019] In some embodiments of this application, the side length of the cooling fan is 60mm-80mm.

[0020] In some embodiments of this application, the projection module includes: a lens and a light source assembly connected to each other;

[0021] The light source assembly is connected to the heat sink via a heat pipe to transfer the heat from the light source assembly to the heat sink.

[0022] This application also provides a vehicle equipped with the vehicle-mounted projection device described in any of the above embodiments.

[0023] Beneficial effects:

[0024] This application provides an in-vehicle projection device and vehicle, in which the cooling fan is horizontally positioned inside the housing, with the fan's airflow directed towards the bottom plate of the housing. This design eliminates the size limitation of the cooling fan due to the height of the in-vehicle projection device. Therefore, a larger cooling fan can be selected based on the size of the bottom plate. Furthermore, the increased fan size results in a lower required rotational speed to achieve the target cooling performance, thus reducing the noise emitted by the cooling fan.

[0025] Compared to existing technologies where the side length of a vertical fan erected along the height of the casing is limited by the height of the side plate of the casing, the vehicle-mounted projection device provided in this application can select a cooling fan with a larger side length according to the side length of the bottom plate of the casing, making the cooling fan larger and producing less noise under the same heat dissipation performance, thereby reducing the noise emitted by the vehicle-mounted projection device while ensuring its heat dissipation performance.

[0026] The outer casing has side panels that surround the perimeter of the base plate and extend along its height, forming a recessed space with the base plate. The cooling fan, radiator, and projection module are housed within this space. When the top plate covers the space formed by the side and base plates, the outer casing becomes a closed structure, allowing heat from the projection module to be transferred to the radiator. When the cooling fan is activated, it exhausts air from inside the casing through the vents on the base plate. This creates a negative pressure zone inside the casing, drawing in cool air from the outside environment through the inlets on the side panels. The cool air exchanges heat with the radiator inside the casing, becoming hot air, which is then exhausted to the outside environment through the vents by the cooling fan, thus cooling the vehicle-mounted projection equipment.

[0027] Of course, any product implementing this application does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application 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 this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0029] Figure 1a This is a structural schematic diagram of an existing vehicle-mounted projection device.

[0030] Figure 1b for Figure 1a A schematic diagram showing the installation location of the vertical fan in the vehicle-mounted projection device.

[0031] Figure 2a A structural schematic diagram of the vehicle-mounted projection device provided in this application;

[0032] Figure 2b for Figure 2a A schematic diagram of the vehicle-mounted projection device from another perspective;

[0033] Figure 2c for Figure 2a A bottom view of the vehicle-mounted projection device shown;

[0034] Figure 3a for Figure 2a An exploded view of the vehicle-mounted projection equipment shown.

[0035] Figure 3b for Figure 2a The image shown is a top view of the vehicle-mounted projection equipment without a roof panel installed.

[0036] Figure 4a for Figure 3b A cross-sectional view along the AA direction;

[0037] Figure 4b for Figure 3b The diagram shows a cooling fan separated by a baffle structure.

[0038] Figure label:

[0039] 1. Outer shell, 11. Top plate, 111. Windproof structure, 12. Bottom plate, 121. Air outlet, 122. Protective net, 13. Side plate, 131. Air inlet, 132. Lens window, 14. Hanging ear, 15. Electrical interface.

[0040] Cooling fan 2;

[0041] Projection module 3, lens 31, light source assembly 32, heat pipe 33;

[0042] Radiator 4;

[0043] Vertical fan 100, distance h between overlapping parts. Detailed Implementation

[0044] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art based on this application are within the scope of protection of this application.

[0045] In existing technologies, such as Figure 1a and Figure 1b As shown, Figure 1a This is a structural diagram of an existing vehicle-mounted projection device. Figure 1b for Figure 1a The diagram shows the installation position of the vertical fan in the vehicle-mounted projection device. Common vehicle-mounted projection devices typically use a vertical fan 100, meaning the airflow of the vertical fan 100 is directed towards the air inlet on the side panel of the casing.

[0046] Currently, with the gradual development of technology, the height of in-vehicle projection equipment is getting smaller and smaller. This has limited the side length of the vertical fan 100 to match the height of the in-vehicle projection equipment, and it is also gradually decreasing. The current height of in-vehicle projection equipment has been reduced to about 50mm, so only 40-series fans (with a side length of 40mm) can be used as the vertical fan 100, such as the 4028, 4015, and 4010 specifications.

[0047] Since in-vehicle projection equipment is typically installed above the passenger compartment, noise levels are critical. However, due to the smaller available size of the vertical fan 100, it must operate at higher speeds to provide sufficient airflow for cooling, resulting in sharper, more piercing noise. Furthermore, high-speed operation accelerates wear and tear on the vertical fan 100, thus reducing its lifespan.

[0048] To reduce noise while ensuring the heat dissipation performance of the vehicle-mounted projection device, this application provides a vehicle-mounted projection device. For example... Figures 2a to 2c As shown, Figure 2a This is a structural schematic diagram of the vehicle-mounted projection device provided in this application. Figure 2b for Figure 2a The diagram shown is a structural schematic of the vehicle-mounted projection device from another perspective. Figure 2c for Figure 2a The image shows a bottom view of the vehicle-mounted projection device. The device includes a housing 1, comprising a top plate 11, a bottom plate 12, and side plates 13 extending along the height direction. The top plate 11 and bottom plate 12 are positioned opposite each other, and the top plate 11, bottom plate 12, and side plates 13 form a hollow internal receiving space. The vehicle-mounted projection device can be fixed inside the vehicle via the top plate 11 or via the side plates 13. An air inlet 131 is provided on the side plate 13, and an air outlet 121 is provided on the bottom plate 12. Figure 3a and Figure 3b As shown, Figure 3a for Figure 2a The exploded view of the vehicle-mounted projection equipment shown. Figure 3b for Figure 2a The diagram shows a top view of the vehicle-mounted projection device without a roof panel. The projection module 3 is installed within the housing space and can project through the housing 1; at least one radiator 4 is installed within the housing space, and the radiator 4 is correspondingly positioned to the air inlet 131; at least one cooling fan 2 is installed within the housing space, offset from the radiator 4, and correspondingly positioned to the air outlet 121, with the cooling fan 2's airflow direction facing the air outlet 121.

[0049] In this embodiment, the cooling fan 2 is horizontally positioned inside the outer casing 1, so that the airflow direction of the cooling fan 2 is towards the bottom plate 12 of the outer casing 1. This way, the size of the cooling fan 2 is not limited by the height of the vehicle-mounted projection device. Therefore, a larger cooling fan 2 can be selected based on the size of the bottom plate 12. A larger cooling fan 2 requires a lower rotational speed to achieve the target cooling performance and produces less noise. Furthermore, the side length of any side of the bottom plate 12 is greater than the height of the side plate 13, allowing the side length of the cooling fan 2 to be greater than the height of the side plate 13.

[0050] Compared to the existing technology where the side length of the vertical fan 100, which is erected along the height of the housing, is limited by the height of the side plate of the housing, the vehicle projection device provided in this application can select a cooling fan 2 with a larger side length according to the side length of the bottom plate 12 of the housing 1. This makes the cooling fan 2 larger and produces less noise under the same heat dissipation performance, thereby reducing the noise emitted by the vehicle projection device while ensuring its heat dissipation performance.

[0051] The outer casing 1 has side plates 13 surrounding the periphery of the base plate 12 and extending along the height direction. The side plates 13 and the base plate 12 form a recessed accommodating space. The side plates 13 and the base plate 12 can be integrally formed. The top plate 11 covers the integral structure formed by the side plates 13 and the base plate 12. The cooling fan 2, the heat sink 4, and the projection module 3 are disposed within the accommodating space. When the top plate 11 covers the accommodating space formed by the side plates 13 and the base plate 12, the outer casing 1 forms a closed structure, which facilitates the formation of an air duct inside the outer casing 1. The air in the air duct can flow directionally from the air inlet 131 to the air outlet 121 under the action of the cooling fan 2. Thus, when the cooling fan 2 is started, it exhausts the air inside the outer casing 1 from the air outlet 121 on the base plate 12. At this time, a negative pressure area is formed inside the outer casing 1 to draw cold air from the outside environment into the outer casing 1 through the air inlet 131 on the side plate 13. The heat generated by the projection module 3 can be transferred to the heat sink 4 through the heat pipe 33. The cold air drawn in from the air inlet 131 exchanges heat with the heat sink 4 inside the outer casing 1 and becomes hot air. Under the action of the cooling fan 2, it is discharged from the air outlet 121 to the outside environment, thus achieving the effect of heat dissipation for the projection module 3.

[0052] Specifically, the side length of the cooling fan 2 is 60mm-80mm. The cooling fan 2 can be an axial fan, which is characterized by low noise. This application avoids the limitation on the size (mainly side length) of the cooling fan 2 by placing the cooling fan 2 horizontally, which is not limited by the height of the vehicle-mounted projection device. It is possible to place multiple 60-series (cooling fan 2 with a side length of 60mm, such as 6015, 6020, etc.) or even multiple 80-series (cooling fan 2 with a side length of 80mm, such as 8015, 8020, etc.) larger-sized cooling fans 2 in a projection device with a height of 50mm. The larger-sized cooling fan 2 can provide a larger air volume at a lower speed, while the noise is lower. For example, a 60mm side-length cooling fan 2 with an airflow of 2000 RPM (revolutions per minute) has a greater airflow than a 40mm side-length cooling fan 2 with an airflow of 6000 RPM, resulting in lower noise. Even if two 40mm side-length cooling fans 2 operate in parallel, the noise level is higher than that of a 60mm side-length cooling fan 2 at the same airflow. Because the cooling fans 2 are horizontally positioned, their side length can be greater than the height of the vehicle-mounted projection device, thus increasing the range of cooling fan 2 options. Larger side-length cooling fans 2 can be selected, allowing them to operate at lower speeds while maintaining heat dissipation performance. This reduces noise from the vehicle-mounted projection device and extends the lifespan of the cooling fans 2 while ensuring sufficient airflow. This application does not require complex modifications to the internal structure of the vehicle-mounted projection device's casing 1; the available sizes of the cooling fans 2 can be increased simply by adjusting their layout.

[0053] In some embodiments of this application, the radiator 4 can be a finned radiator, and the radiator 4 and the cooling fan 2 can be completely offset, that is, there is no overlapping area between the two.

[0054] Please see Figure 3a and Figure 3b Alternatively, along the height direction of the vehicle-mounted projection device, a portion of the radiator 4 may overlap with the cooling fan 2.

[0055] In this embodiment, when a portion of the radiator 4 overlaps with the cooling fan 2, one end of the radiator 4 is connected to the air inlet 131 of the side panel 13, and the other end is located above the cooling fan 2. Thus, when cold air from the outside environment enters the casing 1 through the air inlet 131, the cold air can directly flow into the radiator 4, exchange heat with the radiator 4, and become hot air after heat exchange. This hot air continues to flow along the radiator 4 and finally flows directly above the cooling fan 2, where it is discharged to the outside environment under the action of the cooling fan 2. During the flow of hot air towards the cooling fan 2, because the radiator 4 is located above the cooling fan 2, the hot air can flow directly into the cooling fan 2 under the guiding effect of the radiator 4, reducing noise caused by airflow crosstalk between multiple cooling fans 2, and increasing the heat dissipation area of ​​the radiator 4, effectively improving the heat dissipation area of ​​the vehicle-mounted projection device.

[0056] like Figure 3a As shown, an electrical interface 15 can also be provided on the vehicle-mounted projection device for electrically connecting the vehicle-mounted projection device to other electronic devices.

[0057] In some implementations of this application, such as Figure 4a As shown, Figure 4a for Figure 3b A cross-sectional view along the AA direction. Along the height direction of the vehicle-mounted projection device, the distance h between the overlapping portions of the radiator 4 and the cooling fan 2 is not less than 5mm.

[0058] In this embodiment, when the heat sink 4 and the cooling fan 2 are stacked, the distance between the overlapping parts along the height direction is not less than 5mm. This can avoid the situation where the distance between the heat sink 4 and the cooling fan 2 is too small, which would lead to an increase in the wind resistance of the heat sink 4 and a decrease in the air volume of the cooling fan. This ensures the heat dissipation effect while avoiding noise caused by airflow crosstalk.

[0059] In some implementations of this application, such as Figure 4b As shown, Figure 4b for Figure 3b The diagram shows a cooling fan separated by a baffle structure. There are multiple cooling fans 2; the top plate 11 is provided with a baffle structure 111 extending towards the bottom plate 12, which is used to separate the upper area between two adjacent cooling fans 2 along the boundary of the cooling fans 2.

[0060] In this embodiment, a windbreak structure 111 is provided on the top plate 11. When the top plate 11 covers the opposite side of the bottom plate 12, the windbreak structure 111 of the top plate 11 extends towards the cooling fan 2, such as... Figure 4bAs shown, one end of the wind deflector 111 is fixedly connected to the top plate 11, and the other end abuts against the gap between two adjacent cooling fans 2. In this way, the upper area of ​​two adjacent cooling fans 2 can be separated along the boundary of the cooling fans 2 by a wind deflector 111, so as to avoid airflow crosstalk between the two adjacent cooling fans 2, thereby reducing the noise of the vehicle projection device.

[0061] In some implementations of this application, such as Figure 2c As shown, a protective mesh 122 is provided on the base plate 12 at a position corresponding to the air outlet 121, which is used to isolate the cooling fan 2 located at the air outlet 121 from the external environment. The protective mesh 122 can be a metal structure and is used to shield electromagnetic waves.

[0062] In this embodiment, when there are multiple cooling fans 2, the number of air outlets 121 on the base plate 12 corresponds to the number of cooling fans 2. That is, the air outlet direction of each cooling fan 2 corresponds one-to-one with each air outlet 121. At this time, a protective net 122 can be installed at the position of each air outlet 121. The protective net 122 can prevent users from directly touching the cooling fan 2 during use, thus avoiding finger injuries or damage to the cooling fan 2. When the protective net 122 is a metal structure, it can shield electromagnetic waves of certain wavelengths, thereby improving the electromagnetic compatibility of the vehicle projection device.

[0063] In some implementations of this application, such as Figure 3b As shown, the projection module 3 is centrally located inside the housing 1, and there are two heat sinks 4, which are distributed on both sides of the projection module 3; there are four cooling fans 2, which are evenly distributed on both sides of the projection module 3.

[0064] In this embodiment, the projection module 3 can be positioned in the middle of the housing 1, and the heat sink 4 and cooling fan 2 can be positioned on both sides of the projection module 3, which can effectively cool the projection module 3. In actual use, the number of heat sinks 4 and cooling fans 2 can be adjusted according to actual needs.

[0065] At the same time, such as Figures 2a to 2c As shown, a mounting ear 14 can be provided on the outer casing 1. The mounting ear 14 can be positioned according to the actual usage scenario. For example, the mounting ear 14 can be provided on the side panel 13 of the outer casing 1, or it can be provided on the top panel 11 of the outer casing. The key is to ensure that the vehicle-mounted projection equipment can be fixed to the vehicle's crossbeam. After the vehicle-mounted projection equipment is installed, the top panel 11 is typically close to the vehicle's roof, while the bottom panel 12 is away from the vehicle's roof, so that the air vent 121 of the bottom panel 12 is not obstructed, thus ensuring the heat dissipation performance of the vehicle-mounted projection equipment.

[0066] In some implementations of this application, such as Figure 3a and Figure 3b As shown, the projection module 3 includes: a lens 31 and a light source assembly 32 connected to each other; the light source assembly 32 is connected to the heat sink 4 through a heat pipe 33 to transfer the heat of the light source assembly 32 to the heat sink 4.

[0067] In this embodiment, a lens window 132 can be provided on the side plate 13, and the lens 31 projects to the outside through the lens window 132.

[0068] This application also provides a vehicle that includes the vehicle-mounted projection device described in any of the above embodiments.

[0069] In this embodiment, the cooling fan 2 of the vehicle-mounted projection device is horizontally positioned inside the housing 1, so that the airflow direction of the cooling fan 2 is towards the bottom plate 12 of the housing 1. This way, the size of the cooling fan 2 is not limited by the height of the vehicle-mounted projection device. Therefore, a larger cooling fan 2 can be selected based on the size of the bottom plate 12. A larger cooling fan 2 requires a lower rotational speed and produces less noise to achieve the target cooling performance.

[0070] The above description is merely a preferred embodiment of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application are included within the scope of protection of this application.

Claims

1. A vehicle-mounted projection device, characterized in that, include: The outer shell (1) includes a top plate (11), a bottom plate (12) and a side plate (13) extending along the height direction. The top plate (11) and the bottom plate (12) are arranged opposite to each other. The top plate (11), the bottom plate (12) and the side plate (13) form an internal hollow accommodating space. An air inlet (131) is provided on the side plate (13), and an air outlet (121) is provided on the bottom plate (12); The projection module (3) is installed in the accommodating space and can project through the outer shell (1); At least one radiator (4) is installed in the receiving space, and the radiator (4) is correspondingly arranged with the air inlet (131); At least one cooling fan (2) is installed in the receiving space and is arranged offset from the heat sink (4) and is corresponding to the air outlet (121). The air outlet direction of the cooling fan (2) is towards the air outlet (121).

2. The vehicle-mounted projection device according to claim 1, characterized in that, Along the height direction of the vehicle-mounted projection device, a portion of the radiator (4) overlaps with the cooling fan (2).

3. The vehicle-mounted projection device according to claim 2, characterized in that, Along the height direction of the vehicle-mounted projection device, the distance between the overlapping portion of the radiator (4) and the cooling fan (2) is not less than 5mm.

4. The vehicle-mounted projection device according to claim 1, characterized in that, The number of cooling fans (2) is multiple; The top plate (11) is provided with a windbreak structure (111) extending toward the bottom plate (12), the windbreak structure (111) being used to separate the upper area between two adjacent cooling fans (2) along the boundary of the cooling fans.

5. The vehicle-mounted projection device according to claim 1, characterized in that, A protective net (122) is provided on the base plate (12) at a position corresponding to the air outlet (121) to isolate the cooling fan (2) located at the air outlet (121) from the external environment.

6. The vehicle-mounted projection device according to claim 5, characterized in that, The protective net (122) is a metal structure used to shield electromagnetic waves.

7. The vehicle-mounted projection device according to claim 1, characterized in that, The projection module (3) is centrally located inside the outer casing (1), and there are two heat sinks (4) on each side of the projection module (3). The cooling fans (2) are provided in four units and are evenly distributed on both sides of the projection module (3).

8. The vehicle-mounted projection device according to claim 1, characterized in that, The side length of the cooling fan (2) is 60mm-80mm.

9. The vehicle-mounted projection device according to claim 1, characterized in that, The projection module (3) includes: a lens (31) and a light source assembly (32) connected to each other; The light source assembly (32) is connected to the heat sink (4) via a heat pipe (33) to transfer the heat of the light source assembly (32) to the heat sink (4).

10. A vehicle characterized by comprising: A vehicle-mounted projection device according to any one of claims 1 to 9 is installed.

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