Anti-fog rear cover based on synthetic jet, vehicle lamp and vehicle

Abstract

The utility model provides an anti-fog rear cover based on synthetic jet, a vehicle lamp and a vehicle, a rear cover shell is in sealed connection with a lamp body, and an air inlet channel and an exhaust channel are arranged on the rear cover shell; one end of the air inlet duct is located in the space outside the lamp and provided with a first air inlet one-way valve. The other end of the air inlet duct is located in the lamp inner space and provided with a second air inlet one-way valve. The air inlet synthetic jet device is communicated with the air inlet duct, and the communication position is located between the first air inlet one-way valve and the second air inlet one-way valve; one end of the exhaust duct is located in the lamp outer space and provided with a first exhaust one-way valve. The other end of the air inlet duct is located in the lamp inner space and provided with a second exhaust one-way valve. The exhaust synthesis jet device communicates with the exhaust air duct, and the communication position is located between the first exhaust one-way valve and the second exhaust one-way valve. According to the utility model, the synthetic jet device is integrated into the rear cover, so that the fogging problem of the lamp is solved, and the heat dissipation of the cavity of the lamp can be optimized.

Description

Technical Field

[0001] This utility model relates to the field of vehicle lighting technology, specifically to an anti-fog rear cover based on synthetic jet, as well as vehicle lights and vehicles. Background Technology

[0002] Traditional exhaust caps or vent valves are essentially open openings. When there is negative pressure inside the lamp and in the environment, gas exchange will occur. In high temperature and high humidity environments, moisture will enter the lamp, causing the risk of fogging.

[0003] Fogging in automotive headlights has always been a common problem, accounting for a significant proportion of aftermarket parts issues. Currently, common methods include spraying anti-fogging paint inside the headlight housing and adding desiccants to prevent fogging. However, both methods have significant drawbacks. Anti-fogging paint is prone to sagging under high temperature and humidity conditions. This is because anti-fogging paint doesn't prevent fogging altogether; it works by altering the surface tension of water molecules, causing fog to form a thin film that is invisible to the naked eye. However, the fog is still present. If the anti-fogging coating's manufacturing process is inadequate or it is used for an extended period, sagging will occur. Desiccants become ineffective after absorbing water, and their deterioration rate accelerates in high humidity environments. Although replaceable desiccants are available, they degrade quickly in rainy and humid environments, requiring frequent replacements, which is inconvenient. Therefore, a long-lasting, stable device that can effectively defog headlights is needed.

[0004] Based on the principle of synthetic jet, this utility model improves the structure of the back cover by integrating a synthetic jet generator. This back cover not only solves the problem of fogging in lamps, but also optimizes the heat dissipation of the lamp cavity. Compared with traditional defogging fans, the synthetic jet generator is smaller and more compact, and has a longer service life and higher reliability. Utility Model Content

[0005] In view of the deficiencies in the existing technology, the purpose of this utility model is to provide an anti-fog rear cover, vehicle lights, and vehicle based on synthetic jet.

[0006] According to the present invention, an anti-fog back cover based on synthetic jet is provided, comprising: a back cover shell, an air intake synthetic jet device, and an exhaust synthetic jet device; the back cover shell is sealed to the lamp body, and the back cover shell is provided with an air intake duct and an exhaust channel;

[0007] One end of the air intake duct is located outside the lamp space and is equipped with a first air intake check valve; the other end of the air intake duct is located inside the lamp space and is equipped with a second air intake check valve; the air intake jet generator is connected to the air intake duct, and the connection position is located between the first air intake check valve and the second air intake check valve.

[0008] One end of the exhaust duct is located in the space outside the lamp and is equipped with a first exhaust one-way valve; the other end of the intake duct is located in the space inside the lamp and is equipped with a second exhaust one-way valve; the exhaust jet generator is connected to the exhaust duct, and the connection point is located between the first exhaust one-way valve and the second exhaust one-way valve.

[0009] Preferably, the air intake synthetic jet generator includes a first air inlet, a first housing, and a first vibrating diaphragm;

[0010] A first cavity is formed inside the first housing, and the first air port is disposed on the first housing. The first cavity is connected to the air intake duct through the first air port.

[0011] The first vibrating diaphragm is located inside the first cavity, and the first vibrating diaphragm forms a blow-and-suction fluid by vibrating.

[0012] Preferably, the exhaust gas synthesis jet generator includes a second air inlet, a second housing, and a second vibrating diaphragm;

[0013] A second cavity is formed inside the second housing, and a second air port is disposed on the second housing. The second cavity is connected to the exhaust duct through the second air port.

[0014] The second vibrating diaphragm is located inside the second cavity, and the second vibrating diaphragm forms a blow-and-suction fluid through vibration.

[0015] Preferably, there are multiple intake composite jets, and the number of exhaust composite jets is the same as that of the intake composite jets.

[0016] Preferably, the first intake check valve and the first exhaust check valve are arranged adjacent to each other;

[0017] A ventilated cover is provided on the rear cover housing at the positions of the first intake check valve and the first exhaust check valve.

[0018] Preferably, the ventilated cover is provided with a filter screen.

[0019] Preferably, the rear cover housing is sealed to the lamp body via a spiral sealing cap.

[0020] Preferably, the cross-sections of the air intake duct and the exhaust duct are L-shaped;

[0021] The air intake duct and the exhaust passage are arranged symmetrically side by side. The first air intake check valve and the first exhaust check valve are arranged symmetrically. The second air intake check valve and the second exhaust check valve are arranged symmetrically. The air intake composite jet and the exhaust composite jet are arranged symmetrically.

[0022] The intake composite jet and the exhaust composite jet are located at right angles in an L-shape.

[0023] This utility model also provides a vehicle light, including the aforementioned anti-fog rear cover based on synthetic jet.

[0024] This utility model also provides a vehicle including the aforementioned vehicle lights.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] Based on the principle of synthetic jet, this utility model improves the structure of the back cover by integrating a synthetic jet generator. This back cover not only solves the problem of fogging in lamps, but also optimizes the heat dissipation of the lamp cavity. Compared with traditional defogging fans, the synthetic jet generator is smaller and more compact, and has a longer service life and higher reliability. Attached Figure Description

[0027] Other features, objects and advantages of the present invention will become more apparent from the detailed description of the non-limiting embodiments with reference to the following drawings:

[0028] Figure 1 This is a schematic diagram of the anti-fog back cover based on synthetic jet.

[0029] Figure 2 This is a cross-sectional view of the anti-fog back cover based on synthetic jet.

[0030] Figure 3 This is a schematic diagram of the lighting assembly.

[0031] Figure 4 This is a schematic diagram of the synthetic jet back cover system.

[0032] The diagram shows:

[0033] Lamp body 1, internal space 13

[0034] First exhaust check valve 2, temperature and humidity probe 14

[0035] First intake one-way valve 3 ECU unit 15

[0036] 4 intake jet injectors 16 intake ducts

[0037] First air inlet 5, exhaust duct 17

[0038] First cavity 6; Second air intake check valve 18

[0039] First vibrating diaphragm 7 Second exhaust check valve 19

[0040] Filter screen 8, second air inlet 20

[0041] Vent cover 9 Second cavity 21

[0042] Rear cover assembly 10 Second diaphragm 22

[0043] Spiral sealing plug 11 Rear cover housing 23

[0044] External space of the lamp 12 Exhaust combined jet 24 Detailed Implementation

[0045] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0046] Example 1:

[0047] like Figure 1 As shown, this embodiment provides an anti-fog back cover based on synthetic jet, including: a back cover housing 23, an air intake synthetic jet injector 4, and an exhaust synthetic jet injector 24; the back cover housing 23 is sealed to the lamp body 1, and an air intake duct 16 and an exhaust duct 17 are provided on the back cover housing 23; one end of the air intake duct 16 is located in the external space 12 of the lamp and is provided with a first air intake one-way valve 3; the other end of the air intake duct 16 is located in the internal space 13 of the lamp and is provided with a second air intake one-way valve 18; the air intake synthetic jet injector 4 is connected to the air intake duct 16, and the connection position is located between the first air intake one-way valve 3 and the second air intake one-way valve 18; one end of the exhaust duct 17 is located in the external space 12 of the lamp and is provided with a first exhaust one-way valve 2; the other end of the air intake duct 16 is located in the internal space 13 of the lamp and is provided with a second exhaust one-way valve 19; the exhaust synthetic jet injector 24 is connected to the exhaust duct 17, and the connection position is located between the first exhaust one-way valve 2 and the second exhaust one-way valve 19.

[0048] The first intake check valve 3 and the first exhaust check valve 2 are arranged adjacent to each other; a vent cover 9 is provided on the rear cover housing 23 at the position of the first intake check valve 3 and the first exhaust check valve 2. A filter screen 8 is provided on the vent cover 9.

[0049] The rear cover housing 23 is sealed to the lamp body 1 by a spiral sealing plug 11. Multiple intake composite jets 4 are provided, and the number of exhaust composite jets 24 is the same as that of the intake composite jets 4.

[0050] The intake jet generator 4 includes a first air inlet 5, a first housing, and a first vibrating diaphragm 7. A first cavity 6 is formed inside the first housing, and the first air inlet 5 is disposed on the first housing. The first cavity 6 is connected to the intake duct 16 through the first air inlet 5. The first vibrating diaphragm 7 is located inside the first cavity 6, and the first vibrating diaphragm 7 forms a blow-and-suction fluid through vibration. The exhaust jet generator 24 includes a second air inlet 20, a second housing, and a second vibrating diaphragm 22. A second cavity 21 is formed inside the second housing, and the second air inlet 20 is disposed on the second housing. The second cavity 21 is connected to the exhaust duct 17 through the second air inlet 20. The second vibrating diaphragm 22 is located inside the second cavity 21, and the second vibrating diaphragm 22 forms a blow-and-suction fluid through vibration.

[0051] The intake duct 16 and exhaust duct 17 have L-shaped cross sections; the intake duct 16 and exhaust duct 17 are arranged symmetrically side by side, the first intake check valve 3 and the first exhaust check valve 2 are arranged symmetrically, the second intake check valve 18 and the second exhaust check valve 19 are arranged symmetrically, the intake composite jet injector 4 and the exhaust composite jet injector 24 are arranged symmetrically; the intake composite jet injector 4 and the exhaust composite jet injector 24 are located at right angles to the L-shape.

[0052] This embodiment also provides a vehicle headlight, including the aforementioned anti-fog cover based on synthetic jet. This embodiment also provides a vehicle, including the aforementioned vehicle headlight.

[0053] Example 2:

[0054] Those skilled in the art can understand this embodiment as a more specific description of Embodiment 1.

[0055] This embodiment provides an anti-fog back cover based on synthetic jet technology, which integrates a synthetic jet generator into the back cover. Compared with traditional defogging fans, the synthetic jet generator is smaller and more compact, making it more convenient to use in enclosed and confined spaces. At the same time, it has a longer service life and higher reliability. This back cover not only solves the problem of fogging in lamps, but also optimizes the heat dissipation of the lamp cavity.

[0056] The structural relationship of the composite jet back cover assembly is shown in the diagram. Figure 1 As shown, the first air inlet 5, the first cavity 6, and the first vibrating diaphragm 7 form the intake jet injector 4; the second air inlet 20, the second cavity 21, and the second vibrating diaphragm 22 form the exhaust jet injector 24; the vent cover 9 and the filter screen 8 filter foreign objects; the jet injector rear cover assembly 10 consists of the first exhaust one-way valve 2, the first intake one-way valve 3, the second exhaust one-way valve 19, the second intake one-way valve 18, the intake jet injector 4, the exhaust jet injector 24, the vent cover 9 and the filter screen 8, the spiral sealing cover 11, the intake air duct 16, and the exhaust air duct 17. The jet injector rear cover assembly 10 is fixed to the lamp body 1 by the spiral sealing cover 11, sealing the lamp body 1. A cross-sectional view of the jet injector rear cover is shown below. Figure 2 As shown.

[0057] Composite jet back cover lamp assembly diagram, as shown Figure 3 As shown, the composite jet ejector rear cover assembly 10, temperature and humidity probe 14, ECU unit 15, lamp body 1, and internal lamp components constitute the lamp assembly. The composite jet ejector rear cover assembly 10, temperature and humidity probe 14, and ECU unit 15 are all mounted on the lamp body 1. The temperature and humidity probe 14 has the function of detecting temperature and humidity both inside and outside the lamp body 1, and can monitor the temperature and humidity of the external space 12 and the internal space 13 of the lamp at all times. The ECU unit 15 contains an AD conversion module. The temperature and humidity probe 14 is used to detect the ambient temperature and humidity inside the lamp.

[0058] Working Principle: Synthetic jet control technology studies how to effectively couple microscale disturbances with macroscopic flows to achieve active control. The synthetic jet exciter consists of a vibrating diaphragm, a cavity, and an air inlet. The cavity is connected to the external fluid through the air inlet. The vibrating diaphragm periodically "blows" and draws in the fluid, forming a series of unsteady vortex rings or vortex pairs at the air inlet, which move away from the inlet. These vortex rings or vortex pairs merge as they expand outward, forming a momentum jet. Synthetic jet control technology is characterized by outputting only momentum with zero mass, hence it is also known as a zero-mass jet.

[0059] In layman's terms, it is a type of active control. A cavity is used to alternately blow and inhale, and then a stream is expelled to disrupt the original fluid state, thereby macroscopically regulating the flow field.

[0060] The synthetic jet injector can be installed on the back cover in N combinations, with N / 2 air intake and N / 2 air exhaust. The more units there are, the higher the gas exchange efficiency between the lamp and the outside. Different specifications can be made according to different lamp sizes. The larger the lamp volume, the larger N is. This method is flexible and efficient.

[0061] When the diaphragm vibrates downwards, the second exhaust check valve 19 of the lamp inner space 13 draws air into the exhaust duct 17, and the first intake check valve 3 of the lamp outer space 12 draws air into the duct 16. When the diaphragm vibrates upwards, the first exhaust check valve 2 of the lamp outer space 12 discharges air out of the lamp, and the second intake check valve 18 of the lamp inner space 13 discharges air into the lamp, maintaining negative pressure balance and completing one air cycle. This process continues as the diaphragm vibrates. This embodiment utilizes a check valve and a synthetic jet structure to form a novel air circulation structure, which is simple and reliable.

[0062] like Figure 4As shown, the ECU unit 15 is responsible for data processing and control. When the temperature and humidity probe 14 detects that the absolute humidity of the space outside the lamp 12 is greater than the absolute humidity of the space inside the lamp 13, the synthetic jet will not be triggered and will remain stationary. When the absolute humidity of the space outside the lamp 12 is detected to be less than the absolute humidity of the space inside the lamp 13, the synthetic jet will be triggered to exchange gases and dehumidify the lamp. If the headlight is working, the synthetic jet cover can also remove the heat from the space inside the lamp 13, which greatly reduces the risk of fogging and high temperature of the car lights.

[0063] This invention integrates the synthetic jet generator into the back cover, which solves the problem of fogging in the lamp and also optimizes the heat dissipation of the lamp cavity.

[0064] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0065] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A back cover for preventing fogging based on synthetic jets, characterized in that, include: The rear cover housing (23), the air intake jet injector (4), and the exhaust jet injector (24) are sealed to the lamp body (1). The rear cover housing (23) is provided with an air intake duct (16) and an exhaust duct (17). One end of the air intake duct (16) is located in the external space (12) of the lamp and is provided with a first air intake check valve (3); the other end of the air intake duct (16) is located in the internal space (13) of the lamp and is provided with a second air intake check valve (18); the air intake composite jet (4) is connected to the air intake duct (16), and the connection position is located between the first air intake check valve (3) and the second air intake check valve (18); One end of the exhaust duct (17) is located in the external space (12) of the lamp and is provided with a first exhaust check valve (2); the other end of the intake duct (16) is located in the internal space (13) of the lamp and is provided with a second exhaust check valve (19); the exhaust jet generator (24) is connected to the exhaust duct (17), and the connection position is located between the first exhaust check valve (2) and the second exhaust check valve (19).

2. The anti-fog back cover based on synthetic jet as described in claim 1, characterized in that, The air intake synthetic jet generator (4) includes a first air inlet (5), a first housing, and a first vibrating diaphragm (7); A first cavity (6) is formed inside the first housing, and a first air port (5) is disposed on the first housing. The first cavity (6) is connected to the air intake duct (16) through the first air port (5). The first vibrating diaphragm (7) is located inside the first cavity (6), and the first vibrating diaphragm (7) forms a blow-and-suction fluid by vibrating.

3. The anti-fog back cover based on synthetic jet as described in claim 1, characterized in that, The exhaust gas synthesis jet generator (24) includes a second air port (20), a second housing, and a second vibrating diaphragm (22); A second cavity (21) is formed inside the second housing, and a second air port (20) is disposed on the second housing. The second cavity (21) is connected to the exhaust duct (17) through the second air port (20). The second vibrating diaphragm (22) is located inside the second cavity (21), and the second vibrating diaphragm (22) forms a blow-and-suction fluid by vibration.

4. The anti-fog back cover based on synthetic jet as described in claim 1, characterized in that, The intake synthesis jet (4) is configured in multiple ways, and the number of exhaust synthesis jets (24) is the same as that of the intake synthesis jet (4).

5. The anti-fog back cover based on synthetic jet as described in claim 1, characterized in that, The first intake check valve (3) and the first exhaust check valve (2) are arranged adjacent to each other; A vent cover (9) is provided on the rear cover housing (23) at the positions of the first intake check valve (3) and the first exhaust check valve (2).

6. The anti-fog back cover based on synthetic jet as described in claim 5, characterized in that, A filter screen (8) is provided on the vent cover (9).

7. The anti-fog back cover based on synthetic jet as described in claim 1, characterized in that, The rear cover housing (23) is sealed to the lamp body (1) by a spiral sealing plug (11).

8. The anti-fog back cover based on synthetic jet as described in claim 1, characterized in that, The cross-sections of the air intake duct (16) and the air exhaust duct (17) are L-shaped; The intake duct (16) and the exhaust duct (17) are arranged symmetrically side by side. The first intake check valve (3) and the first exhaust check valve (2) are arranged symmetrically. The second intake check valve (18) and the second exhaust check valve (19) are arranged symmetrically. The intake composite jet generator (4) and the exhaust composite jet generator (24) are arranged symmetrically. The intake composite jet (4) and the exhaust composite jet (24) are located at right angles in an L-shape.

9. A vehicle light, characterized in that, Including the anti-fog back cover based on synthetic jet as described in any one of claims 1 to 8.

10. A vehicle, characterized in that, Includes the vehicle lights as described in claim 9.

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