Car lamp anti-fog device and car lamp structure

Abstract

The utility model provides a vehicle lamp anti-fog device and a vehicle lamp structure, and the vehicle lamp anti-fog device comprises a valve body which is provided with an airflow interaction channel used for communicating with a vehicle lamp space of the vehicle lamp structure, and the mounting surface of the valve body is provided with an airflow port communicating with the airflow interaction channel; the valve plate is arranged on the mounting surface and is provided with a valve port structure which is staggered with the airflow port; in the process that gas flows out from the gas flow interaction channel to the direction of the valve plate, the opening degree of the valve port structure is the first opening degree; and in the process that gas flows into the gas flow interaction channel through the valve plate, the opening degree of the valve port structure is a second opening degree smaller than the first opening degree. The technical problems that when the automobile lamp is extinguished, the temperature of gas in the automobile lamp is gradually reduced, negative pressure (relative to the outside of the automobile lamp) is generated, external gas is sucked into the automobile lamp, and a valve plate arranged in a ventilation component is opened are solved; gas in the external environment directly enters the interior of the automobile lamp through the valve plate, the speed of the gas (especially water vapor) entering the automobile lamp is high, and the phenomenon of fogging in the automobile lamp is difficult to effectively restrain.

Description

Technical Field

[0001] The present application relates to the technical field of automobile parts, and in particular to an anti-fog device for a headlight and a headlight structure. Background Art

[0002] Car lights generally have ventilation components to balance the pressure difference between the inside of the headlight and the external environment. Water vapor inside the headlight and the external environment will also flow through the ventilation components.

[0003] However, in actual use, there is a problem: when the headlights are turned off, the temperature of the gas inside the headlights gradually decreases, generating negative pressure (relative to the outside of the headlights), causing the external gas to be sucked into the headlights, causing the valve plate set in the ventilation component to be opened. Since the existing valve plate is directly opposite to the air inlet in the ventilation component, the gas in the external environment enters the headlights directly through the valve plate, which causes the gas (especially water vapor) to enter the headlights at a high speed, making it difficult to effectively suppress the occurrence of fogging in the headlights. Utility Model Content

[0004] The technical problem that the present application solves is that when the headlights are turned off, the temperature of the gas inside the headlights gradually decreases, generating negative pressure (relative to the outside of the headlights), causing the external gas to be sucked into the headlights, causing the valve plate provided in the breathable component to be opened. Since the existing valve plate is directly opposite to the air inlet in the breathable component, the gas in the external environment enters the headlights directly through the valve plate, which causes the gas (especially water vapor) to enter the headlights at a higher speed, making it difficult to effectively suppress the occurrence of fogging inside the headlights.

[0005] In order to solve the above problems, the present application provides an anti-fog device for headlights, which is used to cooperate with the headlight structure; the anti-fog device for headlights includes: a valve body, the valve body is provided with an airflow interaction channel for connecting to the headlight space of the headlight structure, and the mounting surface of the valve body is provided with an airflow port connected to the airflow interaction channel; a valve plate, the valve plate is arranged on the mounting surface, and is provided with a valve port structure which is staggered with the airflow port; in the process of gas flowing out from the airflow interaction channel toward the valve plate, the opening of the valve port structure is a first opening; in the process of gas flowing into the airflow interaction channel through the valve plate, the opening of the valve port structure is a second opening which is smaller than the first opening.

[0006] Compared with the existing technology, the technical effect achieved by adopting this technical solution is as follows: combined with the staggered arrangement of the valve port structure and the airflow port mentioned in this technical solution, on the one hand, the gas cannot directly enter the airflow port through the valve port structure, which to a certain extent prolongs the time for the gas to enter the airflow interaction channel; on the other hand, the end face of the valve body acts as a stopper for the deformation of the valve port structure, limiting the degree of deformation of the valve port structure, further playing a role in slowing down the gas flow rate. In addition, if the pressure difference between the inside and outside of the headlight is small (that is, the opening pressure of the valve plate is small), due to the limitation of the valve body, the valve plate is not sufficient to form an effective deformation, which can inhibit the gas from flowing into the airflow interaction channel. Therefore, this technical solution limits the second opening to be smaller than the first opening, and overall achieves the effect of difficult entry and easy exit of gas, that is, difficult to enter the headlight space, but easy to flow out of the headlight space, thereby effectively inhibiting the occurrence of fogging in the headlight.

[0007] In one example of the present application, the anti-fog device for vehicle lights includes: a guide plate, which is arranged on a side of the valve plate away from the air flow outlet, and the guide plate is provided with a yield structure for accommodating the valve outlet structure.

[0008] Compared with the existing technology, the technical effect achieved by adopting this technical solution is: combined with the process of gas flowing out of the headlight space, when the valve mouth structure is deformed by gas compression, a yield structure is set up, and the yield structure plays a role of accommodating the valve mouth structure, thereby ensuring that the valve mouth structure can be opened smoothly, thereby improving the efficiency of gas flowing from the valve mouth structure to the external environment.

[0009] In one example of the present application, the area enclosed by the give way structure is the first area; the area enclosed by the valve port structure is the second area; and the area enclosed by the air flow port is the third area; wherein, along the direction perpendicular to the mounting surface, the first area completely covers the second area, and / or the second area completely covers the third area.

[0010] Compared to the prior art, this technical solution achieves the following technical effects: In one specific example, the first area is larger than both the second and third areas, and the second area is larger than the third area. Consequently, during gas flow into the headlight space, at least a portion of the valve structure extends beyond the third area, resulting in this portion of the valve structure being supported by the corresponding end surface of the valve body. Specifically, when the valve structure deforms, it is stopped by the corresponding end surface, causing the opening of this portion to be smaller than the opening of the remaining openings within the third area. Conversely, during gas flow out of the headlight space, the valve structure deforms toward the guide plate, bulging into the yield structure. Since the first area completely covers the second area, the valve structure can open smoothly, thereby improving the efficiency of gas flow from the valve structure to the outside environment. Overall, this achieves the effect of making gas difficult to enter and easy to exit.

[0011] In one example of the present application, the valve port structure includes multiple air holes; the air flow port includes multiple air flow holes; wherein, the opening length and / or opening area of ​​at least one of the multiple air holes is greater than the opening length and / or opening area of ​​at least one of the multiple air holes.

[0012] Compared with the existing technology, the technical effect achieved by adopting this technical solution is: further improving the effect of the anti-fog device of the headlights in controlling the difficulty of gas entering and easing gas exiting.

[0013] In one example of the present application, the valve port structure includes a plurality of air holes arranged around the axis of the valve body; the air flow port includes a plurality of air flow holes arranged around the axis; wherein, at least one of the plurality of air holes has an opening length extending in a direction away from the axis that is greater than the opening length of at least one of the plurality of air holes extending in a direction away from the axis.

[0014] Compared with the existing technology, the technical effect achieved by adopting this technical solution is: further improving the effect of the anti-fog device of the headlights in controlling the difficulty of gas entering and easing gas exiting.

[0015] In one example of the present application, the valve port structure includes a radial ventilation group, which is composed of multiple ventilation holes extending radially relative to the axis; and / or, the valve port structure includes a circumferential ventilation group, which is composed of multiple ventilation holes extending circumferentially around the axis.

[0016] Compared with the existing technology, the technical effect achieved by adopting this technical solution is: ensuring the uniformity and consistency of the gas inlet and outlet valve port structure.

[0017] In one example of the present application, a gas guide channel is provided on one side of the guide plate close to the valve plate; one end of the gas guide channel is connected to the give way structure, and the other end extends in a direction away from the give way structure; wherein, in the process of gas entering the headlight space, the gas passes through the gas guide channel, the give way structure, the valve port structure and the airflow interaction channel in sequence.

[0018] Compared with existing technologies, this technical solution achieves the following technical benefits: by providing a gas diversion channel, the time it takes for gas to enter the airflow interaction channel is further prolonged, thereby effectively suppressing fogging within the headlights. For example, the gas diversion channel can be a long strip or a channel arranged around the yield structure.

[0019] In one example of the present application, a mounting groove for accommodating a desiccant is provided on a side of the valve body away from the valve plate; the anti-fog device for the headlights also includes a top cover sealed to the mounting groove, and the top cover is provided with a plurality of air holes connected to the mounting groove; wherein, the top cover is snap-connected to the valve body.

[0020] Compared with the existing technology, the technical effect achieved by adopting this technical solution is: combined with the actual installation situation of the anti-fog device of the headlight in the headlight structure, the installation groove is installed in the headlight space. Therefore, by placing a desiccant in the installation groove, it can absorb moisture in the headlight space, thereby improving the anti-fog effect of the headlight anti-fog device; in addition, the top cover and the valve body are snap-fitted, which makes it easy to disassemble.

[0021] In one example of the present application, a snap-fit ​​protrusion structure is provided at the edge of the top cover; the valve body is provided with a snap-fit ​​groove that cooperates with the snap-fit ​​protrusion structure; wherein, when the snap-fit ​​protrusion structure cooperates with the snap-fit ​​groove, the top cover is restricted from rotating relative to the valve body; and / or the anti-fog device for the car light also includes a waterproof breathable membrane; the waterproof breathable membrane is sealed to one end of the valve body close to the top cover; and / or, the waterproof breathable membrane is arranged on the side of the valve sheet away from the valve body.

[0022] Compared with the existing technology, the technical effects achieved by adopting this technical solution are: the stability of the top cover installed on the valve body is improved through the mutual cooperation between the snap-fitting protrusion structure and the snap-fitting groove; in addition, when the waterproof and breathable membrane is sealed to the end of the valve body close to the top cover, on the one hand, the desiccant can be sealed in the installation groove to prevent it from being scattered inside the headlight structure. It should be noted that the desiccant here can be a powdered desiccant or a desiccant product containing packaging materials, which will not be repeated here; on the other hand, it can inhibit water vapor from entering the installation groove, thereby extending the time for the desiccant to deteriorate and extending its service life; in contrast, when the waterproof and breathable membrane is arranged on the side of the valve plate away from the valve body, it can reduce the entry of water vapor in the external environment into the interior of the anti-fog device of the headlight.

[0023] On the other hand, the present application also provides a headlight structure, including: a headlight anti-fog device as in any of the above examples; a sealing ring, which is sleeved on the outer surface of the valve body; a headlight housing, and a mounting opening is provided at the rear end of the headlight housing; wherein, when the headlight anti-fog device is installed to the headlight housing through the mounting opening, the sealing ring is clamped between the headlight anti-fog device and the headlight housing.

[0024] Compared with the existing technology, the technical effect achieved by adopting this technical solution is: it can achieve the technical effect corresponding to any of the above examples, which will not be repeated here.

[0025] By adopting the technical solution of this application, the following technical effects can be achieved:

[0026] (1) In combination with the staggered arrangement of the valve port structure and the air flow port mentioned in this technical solution, on the one hand, the gas cannot directly enter the air flow port through the valve port structure, which to a certain extent prolongs the time for the gas to enter the air flow interaction channel; on the other hand, the end face of the valve body plays a certain stopping role in the deformation of the valve port structure, limiting the degree of deformation of the valve port structure, and further playing a role in slowing down the gas flow rate. In addition, if the pressure difference between the inside and outside of the headlight is small (that is, the opening pressure of the valve plate is small), due to the limitation of the valve body, the valve plate is not sufficient to form an effective deformation, which can inhibit the gas from flowing into the air flow interaction channel. Therefore, since this technical solution limits the second opening to be smaller than the first opening, the overall effect of making it difficult for gas to enter and easy to exit is achieved, that is, it is difficult to enter the headlight space, but easy to flow out of the headlight space, thereby effectively inhibiting the occurrence of fogging in the headlight;

[0027] (2) When the waterproof breathable membrane is sealed to the end of the valve body close to the top cover, on the one hand, the desiccant can be sealed in the installation groove to prevent it from being scattered inside the headlight structure. It should be noted that the desiccant here can be a powdered desiccant or a desiccant product containing packaging materials, which will not be described here; on the other hand, it can inhibit water vapor from entering the installation groove, thereby extending the time for the desiccant to deteriorate and extending its service life; in contrast, when the waterproof breathable membrane is set on the side of the valve plate away from the valve body, it can reduce the water vapor in the external environment from entering the interior of the anti-fog device of the headlight. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] To more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings to be used in describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0029] Figure 1 A schematic structural diagram of an anti-fog device for vehicle lights provided in an embodiment of the present application;

[0030] Figure 2 for Figure 1 A structural diagram from another perspective;

[0031] Figure 3 for Figure 2 Cross-sectional view in the AA direction;

[0032] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0033] Figure 5 for Figure 1 Exploded view from another perspective;

[0034] Figure 6 Schematic diagram of the matching relationship between the valve body and the valve plate;

[0035] Figure 7 for Figure 5 Schematic diagram of the structure of the guide plate from another perspective.

[0036] Description of reference numerals:

[0037] 100. Anti-fog device for headlights; 10. Valve body; 11. Airflow interaction channel; 12. Mounting surface; 121. Airflow port; 13. Third region; 14. Axis; 15. Engaging groove; 20. Valve plate; 21. Valve port structure; 211. Radial air permeability group; 212. Circumferential air permeability group; 22. Second region; 30. Guide plate; 31. Yield structure; 32. First region; 33. Gas diversion channel; 34. Diversion port; 40. Top cover; 41. Engaging protrusion structure; 50. Waterproof and breathable membrane; 60. Sealing ring. DETAILED DESCRIPTION

[0038] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0039] See also Figure 1 , which is a structural diagram of a vehicle lamp anti-fog device 100 provided in an embodiment of the present application. Specifically, Figure 2-Figure 7 The anti-fog device 100 for a vehicle lamp is used to cooperate with a vehicle lamp structure. The anti-fog device 100 for a vehicle lamp includes, for example, a valve body 10 and a valve plate 20. The valve body 10 is provided with an airflow interaction channel 11 for communicating with the lamp space of the vehicle lamp structure, and the mounting surface 12 of the valve body 10 is provided with an airflow port 121 communicating with the airflow interaction channel 11. The valve plate 20 is disposed on the mounting surface 12 and is provided with a valve port structure 21 that is offset from the airflow port 121. When gas flows out of the airflow interaction channel 11 toward the valve plate 20, the opening of the valve port structure 21 is a first opening. When gas flows into the airflow interaction channel 11 through the valve plate 20, the opening of the valve port structure 21 is a second opening that is smaller than the first opening.

[0040] For example, the valve plate 20 is a thin sheet structure made of rubber material. Combined with the process of gas flowing from the external environment into the headlight space, the valve plate 20 is deformed toward the valve body 10 under the extrusion of the gas. Specifically, when the extrusion force acts on the valve mouth structure 21, it forces the valve mouth structure 21 to deform and then open its opening or increase its opening. When the valve mouth structure 21 is arranged opposite to the air flow port 121, the gas can be accommodated by the air flow port 121 to accommodate the deformed valve mouth structure 21, and then the gas can flow directly into the air flow interaction channel 11.

[0041] However, in conjunction with the staggered arrangement of the valve opening structure 21 and the airflow opening 121 mentioned in this technical solution, on the one hand, the gas cannot directly enter the airflow opening 121 through the valve opening structure 21, which to a certain extent prolongs the time it takes for the gas to enter the airflow interaction channel 11. On the other hand, the end face of the valve body 10, i.e., the mounting surface 12, acts as a stop to the deformation of the valve opening structure 21, limiting the degree of deformation of the valve opening structure 21 and further slowing the gas flow rate. In addition, if the pressure difference between the inside and outside of the headlight is small (i.e., the opening pressure of the valve plate is small), the valve plate 20 is insufficient to form an effective deformation due to the restriction of the valve body 10, which can inhibit the flow of gas into the airflow interaction channel 11. Therefore, this technical solution limits the second opening to be smaller than the first opening, and overall achieves the effect of making it difficult for gas to enter and easy to exit, that is, difficult to enter the headlight space, but easy to flow out of the headlight space, thereby effectively suppressing the occurrence of fogging in the headlight.

[0042] Preferably, the anti-fog device 100 for a headlight includes, for example, a deflector plate 30 disposed on a side of the valve plate 20 away from the airflow port 121. The deflector plate 30 is provided with a relief structure 31 for accommodating the valve port structure 21. In conjunction with the process of gas flowing out of the headlight space, when the valve port structure 21 is squeezed and deformed by the gas, the relief structure 31 is provided to accommodate the valve port structure 21, thereby ensuring that the valve port structure 21 can open smoothly, thereby improving the efficiency of gas flowing out of the valve port structure 21 to the external environment.

[0043] Combine Figure 5 Preferably, the area enclosed by the give way structure 31 is the first area 32; the area enclosed by the valve port structure 21 is the second area 22; and the area enclosed by the air flow port 121 is the third area 13; wherein, along the direction perpendicular to the mounting surface 12, the first area 32 completely covers the second area 22, and / or the second area 22 completely covers the third area 13.

[0044] In one specific example, the first area 32 is larger than both the second area 22 and the third area 13, and the second area 22 is larger than the third area 13. Therefore, during the process of gas flowing into the vehicle lamp space, at least a portion of the valve port structure 21 extends beyond the third area 13, causing this portion of the valve port structure 21 to be supported by the corresponding end surface of the valve body 10. In other words, when the valve port structure 21 deforms, it is stopped by the corresponding end surface, resulting in the opening degree of this portion of the opening being smaller than the opening degree of the remaining opening within the third area 13.

[0045] In contrast, as gas flows out of the headlight space, the valve port structure 21 deforms toward the deflector plate 30, causing it to bulge into the relief structure 31. Since the first region 32 completely covers the second region 22, the valve port structure 21 can open smoothly, improving the efficiency of gas flow from the valve port structure 21 to the outside environment. Overall, this achieves a gas flow that is difficult to enter and easy to exit. The relief structure is specifically a recessed groove formed on the deflector plate 30.

[0046] Preferably, the valve port structure 21 includes multiple air holes; the air flow port 121 includes multiple air flow holes; wherein, the opening length and / or opening area of ​​at least one of the multiple air holes is greater than the opening length and / or opening area of ​​at least one of the multiple air holes.

[0047] Combine Figure 5 and Figure 6 Preferably, the valve port structure 21 includes a plurality of air holes arranged about the axis 14 of the valve body 10; the air flow opening 121 includes a plurality of air holes arranged about the axis 14; wherein the opening length of at least one of the plurality of air holes extending away from the axis 14 is greater than the opening length of at least one of the plurality of air holes extending away from the axis 14. For example, the plurality of air holes may be regularly arranged about the axis 14, specifically, the plurality of air holes are equally spaced from each other. Of course, the plurality of air holes may also be dispersed about the axis 14, with the distance between any air hole and the axis 14 being different from the distance between the remaining air holes and the axis 14, specifically, the distance between the plurality of air holes and the axis 14 gradually increasing in a clockwise direction about the axis 14. Of course, there are many other configurations regarding the arrangement in which the distance between any air hole and the axis 14 is different from the distance between the remaining air holes and the axis 14, and are not limited to the above.

[0048] Preferably, the valve port structure 21 includes a radial ventilation group 211, which is composed of multiple ventilation holes extending radially relative to the axis 14; and / or the valve port structure 21 includes a circumferential ventilation group 212, which is composed of multiple ventilation holes extending circumferentially around the axis 14. This ensures uniformity and consistency in the flow of gas into and out of the valve port structure 21.

[0049] Preferably, a gas guide channel 33 is provided on the side of the guide plate 30 close to the valve plate 20; one end of the gas guide channel 33 is connected to the yield structure 31, and the other end extends in a direction away from the yield structure 31; wherein, in the process of gas entering the headlight space, the gas passes through the gas guide channel 33, the yield structure 31, the valve port structure 21, and the airflow interaction channel 11 in sequence. Specifically, the guide plate 30 is provided with a guide port 34 connected to the end of the gas guide channel 33 away from the yield structure 31. In the process of gas flowing into the headlight space, the gas first passes through the waterproof and breathable membrane 50 provided on the side of the guide plate 30 away from the valve body 10, then enters the gas guide channel 33 through the guide port 34, then converges in the yield structure 31, and finally flows into the airflow interaction channel 11 from the valve port structure 21.

[0050] Preferably, a mounting groove for accommodating a desiccant is provided on a side of the valve body 10 away from the valve plate 20; the anti-fog device 100 for vehicle lamps further comprises a top cover 40 sealed to the mounting groove, the top cover 40 is provided with a plurality of air holes connected to the mounting groove; wherein, the top cover 40 is snap-fitted to the valve body 10.

[0051] In combination with the actual installation situation of the anti-fog device 100 for the headlight in the headlight structure, the installation groove is installed in the headlight space. Therefore, by placing a desiccant in the installation groove, it can absorb moisture in the headlight space, thereby improving the anti-fog effect of the anti-fog device 100 for the headlight. In addition, the top cover 40 and the valve body 10 are snap-fitted, which makes disassembly easy.

[0052] Preferably, a snap-fit ​​protrusion structure 41 is provided at the edge of the top cover 40; the valve body 10 is provided with a snap-fit ​​groove 15 that cooperates with the snap-fit ​​protrusion structure 41; wherein, when the snap-fit ​​protrusion structure 41 cooperates with the snap-fit ​​groove 15, the top cover 40 is restricted from rotating relative to the valve body 10.

[0053] Preferably, the anti-fog device 100 for vehicle lights further includes a waterproof breathable membrane 50 ; the waterproof breathable membrane 50 is sealed to one end of the valve body 10 close to the top cover 40 ; and / or the waterproof breathable membrane 50 is arranged on a side of the valve plate 20 away from the valve body 10 .

[0054] Specifically, when the waterproof breathable membrane 50 is sealed to the end of the valve body 10 close to the top cover 40, on the one hand, the desiccant can be sealed in the installation groove to prevent it from being scattered inside the headlight structure. It should be noted that the desiccant here can be a powdered desiccant or a desiccant product containing packaging materials, which will not be repeated here; on the other hand, it can inhibit water vapor from entering the installation groove, thereby extending the time for the desiccant to deteriorate and extending its service life; in contrast, when the waterproof breathable membrane 50 is arranged on the side of the valve plate 20 away from the valve body 10, it can reduce the water vapor in the external environment from entering the interior of the headlight anti-fog device 100.

[0055] In one embodiment, the waterproof breathable membrane 50 comprises two membranes, designated as Membrane 1 and Membrane 2 for ease of distinction. Membrane 1 is positioned at the opening of the mounting slot, while Membrane 2 is positioned on the side of the deflector 30 away from the valve body 10. As gas flows into the headlight space, it passes through Membrane 2, the guide opening 34 of the deflector 30, the gas diversion channel 33, the relief structure 31, the valve port structure 21, the airflow opening 121, the airflow interaction channel 11, and finally the headlight space.

[0056] On the other hand, the embodiment of the present application also provides a headlight structure. Specifically, the headlight structure includes, for example, the headlight anti-fog device 100, the sealing ring 60 and the headlight housing as in the above-mentioned embodiment; the sealing ring 60 is sleeved on the outer surface of the valve body 10; the rear end of the headlight housing is provided with a mounting opening; wherein, when the headlight anti-fog device 100 is installed to the headlight housing through the mounting opening, the sealing ring 60 is clamped between the headlight anti-fog device 100 and the headlight housing. Correspondingly, in this embodiment, the technical effect corresponding to any technical solution in the above-mentioned embodiments can be achieved, which will not be repeated here.

[0057] Although the present application is disclosed as above, the present application is not limited thereto. Any person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application shall be based on the scope defined by the claims.

Claims

1. A headlight anti-fog device, which is used to cooperate with the headlight structure; characterized in that: The anti-fog device for vehicle lights comprises: A valve body (10), the valve body (10) being provided with an airflow interaction channel (11) for communicating with the headlight space of the headlight structure, and a mounting surface (12) of the valve body (10) being provided with an airflow opening (121) communicating with the airflow interaction channel (11); A valve plate (20), the valve plate (20) being arranged on the mounting surface (12) and provided with a valve port structure (21) staggered with the air flow port (121); During the process of gas flowing out from the airflow interaction channel (11) toward the valve plate (20), the opening of the valve port structure (21) is a first opening; during the process of gas flowing into the airflow interaction channel (11) through the valve plate (20), the opening of the valve port structure (21) is a second opening that is smaller than the first opening.

2. The anti-fog device for vehicle lights according to claim 1, characterized in that: include: A guide plate (30) is provided on a side of the valve plate (20) away from the air flow port (121), and the guide plate (30) is provided with a relief structure (31) for accommodating the valve port structure (21).

3. The anti-fog device for vehicle lights according to claim 2, characterized in that: The area enclosed by the giving way structure (31) is a first area (32); The area enclosed by the valve port structure (21) is a second area (22); The area enclosed by the airflow opening (121) is the third area (13); Wherein, along a direction perpendicular to the mounting surface (12), the first area (32) completely covers the second area (22), and / or the second area (22) completely covers the third area (13).

4. The anti-fog device for vehicle lights according to claim 1, characterized in that: The valve port structure (21) includes a plurality of air holes; the air flow port (121) includes a plurality of air flow holes; Wherein, the opening length and / or opening area of ​​at least one of the plurality of air holes is larger than the opening length and / or opening area of ​​at least one of the plurality of air flow holes.

5. The anti-fog device for vehicle lights according to claim 4, characterized in that: The valve port structure (21) includes a plurality of air holes arranged around the axis (14) of the valve body (10); The air flow port (121) includes a plurality of air flow holes arranged around the axis (14); The opening length of at least one of the plurality of air holes extending in a direction away from the axis (14) is greater than the opening length of at least one of the plurality of air flow holes extending in a direction away from the axis (14).

6. The anti-fog device for vehicle lights according to claim 5, characterized in that: The valve port structure (21) comprises a radial ventilation group (211), wherein the radial ventilation group (211) is composed of a plurality of ventilation holes extending radially relative to the axis (14); And / or, the valve port structure (21) includes a circumferential air permeability group (212), and the circumferential air permeability group (212) is composed of a plurality of air permeability holes extending circumferentially around the axis (14).

7. The anti-fog device for vehicle lights according to claim 2 or 3, characterized in that: A gas guide channel (33) is provided on one side of the guide plate (30) close to the valve plate (20); One end of the gas guide channel (33) is in communication with the yield structure (31), and the other end extends in a direction away from the yield structure (31); In the process of the gas entering the headlight space, the gas passes through the gas guide channel (33), the yield structure (31), the valve port structure (21) and the airflow interaction channel (11) in sequence.

8. The anti-fog device for vehicle lamps according to any one of claims 1 to 3, characterized in that: A mounting groove for accommodating a desiccant is provided on a side of the valve body (10) away from the valve plate (20); The vehicle lamp anti-fog device further comprises a top cover (40) sealed to the mounting slot, wherein the top cover (40) is provided with a plurality of air holes communicating with the mounting slot; Wherein, the top cover (40) is snap-connected with the valve body (10).

9. The anti-fog device for vehicle lights according to claim 8, characterized in that: The edge of the top cover (40) is provided with a snap-fitting protrusion structure (41); The valve body (10) is provided with a snap-fit ​​groove (15) that cooperates with the snap-fit ​​protrusion structure (41); When the engaging protrusion structure (41) is engaged with the engaging groove (15), the top cover (40) is restricted from rotating relative to the valve body (10); and / or The vehicle lamp anti-fog device further comprises a waterproof and breathable membrane (50); The waterproof breathable membrane (50) is sealed to one end of the valve body (10) close to the top cover (40); and / or the waterproof breathable membrane (50) is arranged on a side of the valve plate (20) away from the valve body (10).

10. A vehicle lamp structure, characterized in that: include: The anti-fog device for vehicle lights according to any one of claims 1 to 9; A sealing ring (60), the sealing ring (60) being sleeved on the outer surface of the valve body (10); A headlight housing, wherein a mounting opening is provided at a rear end of the headlight housing; When the anti-fog device for the vehicle lamp is installed on the vehicle lamp housing through the installation opening, the sealing ring (60) is sandwiched between the anti-fog device for the vehicle lamp and the vehicle lamp housing.

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