Drying device and vehicle lamp

Abstract

The invention provides a drying device and a car lamp, the drying device is provided with a first end and a second end which are opposite, when the drying device is matched with the car lamp, the first end is located in the internal environment of the car lamp, the second end is located in the external environment of the car lamp, the drying device comprises a shell, and an airflow channel structure forming a first airflow channel is arranged in the shell; the outside of the duckbill valve is matched with the airflow channel structure to form a second airflow channel; when the air pressure of the internal environment is larger than that of the external environment, the duckbill valve and the airflow channel structure form a first matching state; and in the first matching state, gas sequentially passes through the first gas flow channel and the second gas flow channel and then flows out. The technical problem to be solved by the invention is that a labyrinth structure is generally used in an existing vehicle lamp to limit external gas from entering the vehicle lamp too fast so as to reduce the probability of water mist generation, but the probability also limits the discharge of high-temperature and high-humidity gas in the vehicle lamp.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle lamp manufacturing, and more particularly, to a drying device and a vehicle lamp. Background Art

[0002] With the increasing maturity of LED light source technology, the cost of using LEDs as vehicle lamp light sources has gradually decreased. LED vehicle lamps will gradually replace halogen vehicle lamps and high-intensity discharge vehicle lamps as the most widely used option for automotive lighting. When using LEDs as the light source of vehicle lamps, the problem of fogging in vehicle lamps has become increasingly serious. Different from the high temperature of previous halogen vehicle lamps and high-intensity discharge vehicle lamps, the temperature of the internal parts of LED vehicle lamps will not exceed 140°C at most, and the internal temperature of LED vehicle lamps is relatively concentrated and unevenly distributed, so the vehicle lamp mask cannot be effectively heated.

[0003] During the daily use of a vehicle, when the external environment of the vehicle alternates between hot and cold, for example: car washing, driving into a basement, cold snap, etc., fog will form on the inner surface of the vehicle lamp. The fog will greatly hinder the brightness of the light emitted by the vehicle headlamp, and greatly reduce the driving safety of the driver at night or in low visibility road conditions; in the prior art, desiccants are placed inside the vehicle lamp, and the water vapor inside the vehicle lamp is discharged through a ventilation device.

[0004] However, there are at least the following problems in the related art: Currently, a maze structure is usually used in vehicle lamps to limit the rapid entry of external gas into the vehicle lamp to reduce the probability of water mist generation, but this also limits the discharge of high-temperature and high-humidity gas inside the vehicle lamp. Summary of the Invention

[0005] The technical problem solved by the present invention is that currently, a maze structure is usually used in vehicle lamps to limit the rapid entry of external gas into the vehicle lamp to reduce the probability of water mist generation, but this also limits the discharge of high-temperature and high-humidity gas inside the vehicle lamp.

[0006] To solve the above problems, the present invention provides a drying device. The drying device has opposite first and second ends. When the drying device is cooperated with the vehicle lamp, the first end is located in the internal environment of the vehicle lamp, and the second end is located in the external environment of the vehicle lamp. The drying device includes: a housing, and an air flow channel structure forming a first air flow channel is arranged inside the housing; a duckbill valve, the outside of the duckbill valve is cooperated with the air flow channel structure to form a second air flow channel; wherein, when the air pressure in the internal environment is greater than the air pressure in the external environment, the duckbill valve and the air flow channel structure form a first cooperation state; when in the first cooperation state, the gas flows out after passing through the first air flow channel and the second air flow channel in sequence.

[0007] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: combined with actual working conditions, when the headlights are turned on, the air temperature inside the headlights increases, the air pressure inside the headlights increases, the air pressure of the internal environment is greater than the air pressure of the external environment, and the high-temperature and high-humidity gas inside the headlights can be quickly discharged through the first airflow channel and the second airflow channel in turn, so as to extend the service life of the desiccant and thus improve the lighting effect of the headlights.

[0008] In one example of the present invention, a third airflow channel is provided inside the duckbill valve, and the third airflow channel is connected to the first airflow channel through the opening of the duckbill valve; wherein, when the air pressure of the external environment is greater than the air pressure of the internal environment, the opening opens, and the duckbill valve and the airflow channel structure form a second matching state; when in the second matching state, the gas flows in after passing through the third airflow channel, the opening and the first airflow channel in sequence.

[0009] Compared with the prior art, the technical effect achieved by adopting this technical solution is as follows: when the automobile headlights are turned from on to off, the air temperature inside the headlights decreases, the air pressure inside the headlights decreases, the air pressure of the external environment is greater than the air pressure of the internal environment, the opening is opened, and the gas outside the headlights flows into the interior of the headlights through the third air flow channel, the opening and the first air flow channel in sequence, thereby balancing the air pressure inside and outside the headlights; the gas in the traditional drying device all enters and exits through the valve port of the valve plate, and the speed of gas inflow and outflow is similar. In order to minimize the entry of water vapor in the air into the interior of the headlight, the valve port of the valve plate is usually set to be smaller, which limits the discharge of high-temperature and high-humidity gas. The present invention separates the gas inlet and outlet channels, thereby limiting the excessively fast entry of external gas into the headlights while greatly increasing the discharge speed of high-temperature and high-humidity gas inside the headlights.

[0010] In one example of the present invention, the duckbill valve includes a fixed portion and an elastic portion that are interconnected; the elastic portion is provided with an opening; the fixed portion is fixedly arranged relative to the airflow channel structure; the airflow channel structure includes a guide arc surface; wherein, when in a first mating state, the opening is closed, the elastic portion is separated from the guide arc surface, and the second airflow channel is opened; when in a second mating state, the opening is opened, the elastic portion is fitted with the guide arc surface, and the second airflow channel is closed.

[0011] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: The elastic part of the duckbill valve and the opening design of the elastic part enable the drying device to flexibly change its state under different air pressure differences; when in the first mating state, the opening is closed, the elastic part is separated from the guide arc surface, and the second guide channel is opened to allow the high-temperature and high-humidity gas to be quickly discharged; when in the second mating state, the opening is opened, the elastic part fits with the guide arc surface, and the second air flow channel is closed to prevent gas from entering the headlight through the second air flow channel; this structure can effectively achieve the dehumidification function of the drying device, enhance its adaptability and reliability under different working conditions, further improve the waterproof performance of the drying device and the service life of the headlight.

[0012] In an example of the present invention, the drying device further includes a first cover assembly, and the first cover assembly is disposed on the side of the duckbill valve away from the air flow channel structure for pressing the duckbill valve.

[0013] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: The duckbill valve may become loose or shift in position due to factors such as vibration and temperature changes, resulting in problems such as poor sealing and gas leakage, affecting the normal operation and performance stability of the drying device; by setting the first cover assembly to press the duckbill valve, a certain pressure can be applied to the duckbill valve to make it closely fit at the end of the air flow channel structure, thereby improving the fixing stability of the duckbill valve; this pressing method can effectively prevent the duckbill valve from loosening or shifting in position during use, enhance the sealing performance of the drying device, ensure that the drying device can normally achieve the control and sealing functions of gas flow under various air pressure differences, improve the quality and performance stability of the product, reduce the risk of failure caused by component loosening, and reduce the maintenance cost.

[0014] In an example of the present invention, the drying device further includes a first breathable membrane, and the first breathable membrane is disposed at one end of the first cover assembly away from the air flow channel structure.

[0015] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: By setting the first breathable membrane at one end of the first cover assembly away from the air flow channel structure, it can effectively block the entry of external water vapor into the drying device. In this way, even in a high-humidity environment, the external water vapor cannot enter the interior of the drying device, thereby further improving the waterproof performance of the drying device. At the same time, the first breathable membrane allows gas to pass through normally and does not affect the gas exchange function of the drying device, ensuring the normal operation of the drying device in adjusting the air pressure difference and controlling the gas flow rate, creating a drier and more stable environment inside the headlight, extending the service life of the headlight, and improving its reliability in harsh environments.

[0016] In an example of the present invention, a second breathable membrane is provided on the side of the housing away from the duckbill valve, and a receiving space for containing a desiccant is formed between the second breathable membrane and the housing.

[0017] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: A second breathable membrane is provided on the side of the housing away from the duckbill valve, and a receiving space for containing a desiccant is formed between the second breathable membrane and the housing. This design provides a dedicated area for placing the desiccant, enabling the desiccant to come into full contact with the gas inside the headlight and effectively absorb the water vapor generated inside; the second breathable membrane allows the water vapor to pass through, and the desiccant can adsorb this water vapor, thereby keeping the inside of the headlight dry; at the same time, this structure separates the desiccant from other components of the headlight, preventing the desiccant from scattering or coming into contact with other components, ensuring the cleanliness inside the headlight and the adsorption efficiency of the desiccant; in addition, the design of the receiving space also facilitates the installation and replacement of the desiccant, enabling the drying device to effectively perform its moisture absorption function for a long time, improving the reliability and service life of the headlight, and reducing the risk of failures caused by internal water accumulation.

[0018] In an example of the present invention, the drying device further includes a second cover assembly, and the second cover assembly is provided at one end of the second breathable membrane away from the housing; the second cover assembly is provided with ventilation holes.

[0019] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: By providing the second cover assembly at one end of the second breathable membrane away from the housing and providing ventilation holes on the second cover assembly, it can provide good protection for the second breathable membrane. The second cover assembly can prevent external objects from directly hitting the second breathable membrane, avoiding its damage or deformation, and at the same time can also prevent dust, pollutants, etc. from adhering to the surface of the second breathable membrane, affecting its air permeability. The design of the ventilation holes allows gas to pass through normally, ensuring unobstructed water vapor exchange between the desiccant and the gas inside the headlight, thereby ensuring the normal moisture absorption function of the drying device. This structure enhances the durability and reliability of the drying device and extends its service life.

[0020] In an example of the present invention, an embedding portion is provided at one end of the second cover assembly close to the housing, the embedding portion is embedded into the air flow channel structure, and the embedding portion is provided with a communication hole communicating with the first air flow channel.

[0021] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: By providing an embedding portion at one end of the second cover assembly close to the housing, the embedding portion is embedded into the air flow channel structure, and a communication hole communicating with the first air flow channel is provided in the embedding portion, while ensuring the tight connection between the second cover assembly and the housing, it also ensures the conduction of the first air flow channel.

[0022] In an example of the present invention, the housing includes a convex portion disposed around the outer circumference of the housing. When the drying device is engaged with the vehicle headlight, the convex portion abuts against the vehicle headlight.

[0023] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: By providing a convex portion around the outer circumference of the housing, when the drying device is engaged with the vehicle headlight, the convex portion abuts against the vehicle headlight, preventing the drying device from being embedded inside the vehicle headlight and being difficult to remove, making the installation and disassembly more convenient.

[0024] On the other hand, the present invention also provides a vehicle headlight, including: the drying device in any of the above examples.

[0025] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: It can achieve the technical effects corresponding to any of the above examples, which will not be elaborated here.

[0026] After adopting the technical solution of the present invention, the following technical effects can be achieved: (1) Considering the actual working conditions, when the vehicle headlight is lit, the air temperature inside the vehicle headlight rises, the air pressure inside the vehicle headlight increases, the air pressure at the first end of the drying device is greater than the air pressure at the second end, and the high-temperature and high-humidity gas inside the vehicle headlight can be quickly discharged through the first air flow channel and the second air flow channel in sequence, so as to extend the service life of the desiccant, thereby improving the lighting effect of the vehicle headlight; Compared with the traditional drying device in which the gas enters and exits through the opening of the valve plate, the flow rate of the gas depends to a certain extent on the size of the opening of the valve plate. In the present invention, the second air flow channel is formed between the outside of the duckbill valve and the inner wall of the air flow channel structure, thus facilitating the discharge of the high-temperature and high-humidity gas. (2) When the automotive headlamp changes from being lit to being extinguished, the air temperature inside the vehicle headlight decreases, the air pressure inside the vehicle headlight decreases, the air pressure at the second end of the drying device is greater than the air pressure at the first end, the opening is opened, and the gas outside the vehicle headlight flows into the inside of the vehicle headlight through the third air flow channel, the opening and the first air flow channel in sequence, thereby balancing the air pressure inside and outside the vehicle headlight; Since the opening degree of the opening is much smaller than the opening degrees of the first air flow channel and the second air flow channel, the speed of the gas entering the inside of the vehicle headlight is much less than the speed of the gas flowing out of the inside of the vehicle headlight, thus while restricting the outside gas from entering the vehicle headlight too quickly, greatly increasing the discharge speed of the high-temperature and high-humidity gas inside the vehicle headlight. (3) The elastic part of the duckbill valve and the opening design of the elastic part enable the drying device to flexibly change its state under different air pressure differences. When in the first mating state, the opening is closed, the elastic part is separated from the guide arc surface, and the second guide channel is opened to allow the high-temperature and high-humidity gas to quickly discharge. When in the second mating state, the opening is opened, the elastic part fits with the guide arc surface, and the second air flow channel is closed to prevent gas from entering the headlight through the second air flow channel. This structure can effectively achieve the dehumidification function of the drying device, enhance its adaptability and reliability under different working conditions, further improve the waterproof performance of the drying device and the service life of the headlight. (4) The duckbill valve may become loose or shift in position due to factors such as vibration and temperature changes, resulting in problems such as poor sealing and gas leakage, affecting the normal operation and performance stability of the drying device. By setting the first cover assembly to press the duckbill valve, a certain pressure can be applied to the duckbill valve to make it closely fit at the end of the air flow channel structure, thereby improving the fixing stability of the duckbill valve. This pressing method can effectively prevent the duckbill valve from loosening or shifting in position during use, enhance the sealing performance of the drying device, ensure that the drying device can normally achieve the control and sealing functions of gas flow under various air pressure differences, improve the quality and performance stability of the product, reduce the risk of failure caused by component loosening, and reduce the maintenance cost. Brief Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings to be used in the description of the embodiments will be briefly introduced below. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings. Figure 1 It is a schematic structural diagram of a drying device provided by an embodiment of the present invention. Figure 2 It is Figure 1 A schematic structural diagram of the drying device from another perspective as shown. Figure 3 It is Figure 2 A cross-sectional view taken along the A-A direction in Figure 4 It is Figure 3 A schematic structural diagram of the duckbill valve as shown. Figure 5 It is a schematic diagram of the cooperation of the duckbill valve, the first cover assembly and the air flow channel structure when the air pressure in the external environment is balanced with that in the internal environment. Figure 6 It is a schematic diagram of the cooperation of the duckbill valve, the first cover assembly and the air flow channel structure when the air pressure in the internal environment is greater than that in the external environment. Figure 7Schematic diagram of the cooperation of the duckbill valve, the first cover assembly and the air flow channel structure when the air pressure in the internal environment is greater than that in the external environment.

[0028] Description of the reference numerals: 100, drying device; 10, housing; 11, first end; 12, second end; 13, second air flow channel; 14, third air flow channel; 15, air flow channel structure; 20, first air flow channel; 21, guiding arc surface; 30, duckbill valve; 31, fixing part; 32, elastic part; 33, opening; 40, first cover assembly; 50, first breathable membrane; 60, second breathable membrane; 70, second cover assembly; 71, breathable hole; 72, embedding part; 721, circulation hole; 80, protruding part; 90, seal; 91, clamping part. Detailed implementation manners

[0029] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention and should not be construed as a limitation to the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly defined and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0031] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention will be described in detail below with reference to the drawings.

[0032] See Figures 1 - 4, which is a schematic structural diagram of a drying device provided by an embodiment of the present invention. Specifically, the present invention provides a drying device 100 that applies a duckbill valve 30. The drying device 100 has opposite first end 11 and second end 12. When the drying device 100 cooperates with a vehicle headlight, the first end 11 is located in the internal environment of the vehicle headlight, and the second end 12 is located in the external environment of the vehicle headlight. The drying device 100 includes a housing 10 and a duckbill valve 30. An air flow channel structure 15 forming a first air flow channel 20 is provided inside the housing 10; the outside of the duckbill valve 30 cooperates with the air flow channel structure 15 to form a second air flow channel 13; wherein, when the air pressure in the internal environment is greater than the air pressure in the external environment, the duckbill valve 30 and the air flow channel structure 15 form a first cooperation state; when in the first cooperation state, the gas flows out after passing through the first air flow channel 20 and the second air flow channel 13 in sequence.

[0033] Further, referring to Figures 5 - 7 , in combination with the actual working conditions, when the vehicle headlight is lit, the air temperature inside the vehicle headlight rises, the air pressure inside the vehicle headlight rises, the air pressure in the internal environment is greater than the air pressure in the external environment, and the high-temperature and high-humidity gas inside the vehicle headlight can quickly discharge through the first air flow channel 20 and the second air flow channel 13 in sequence, so as to extend the service life of the desiccant and thus improve the lighting effect of the vehicle headlight.

[0034] Preferably, a third air flow channel 14 is provided inside the duckbill valve 30, and the third air flow channel 14 communicates with the first air flow channel 20 through an opening 33 of the duckbill valve 30; wherein, when the air pressure in the external environment is greater than the air pressure in the internal environment, the opening 33 opens, and the duckbill valve 30 and the air flow channel structure 15 form a second cooperation state; when in the second cooperation state, the gas flows in after passing through the third air flow channel 14, the opening 33 and the first air flow channel 20 in sequence.

[0035] Further, the opening degree of the second air flow channel 13 when in the first cooperation state is greater than the opening degree of the opening 33 when in the second cooperation state.

[0036] Further, when the vehicle headlight changes from being lit to being extinguished, the air temperature inside the vehicle headlight decreases, the air pressure inside the vehicle headlight decreases, the air pressure in the external environment is greater than the air pressure in the internal environment, the opening 33 opens, and the gas outside the vehicle headlight flows into the inside of the vehicle headlight through the third air flow channel 14, the opening 33 and the first air flow channel 20 in sequence, so as to balance the air pressure inside and outside the vehicle headlight; in the traditional drying device 100, the gas all enters and exits through the valve port of the valve plate, and the gas inflow and outflow speeds are similar. In order to minimize the water vapor in the air from entering the inside of the vehicle headlight, the valve port of the valve plate is usually set to be small, which limits the discharge of the high-temperature and high-humidity gas. The present invention separates the gas inlet and outlet channels, thereby achieving that while restricting the outside gas from entering the vehicle headlight too quickly, the discharge speed of the high-temperature and high-humidity gas inside the vehicle headlight is greatly increased.

[0037] Preferably, the duckbill valve 30 includes a fixed part 31 and an elastic part 32 which are connected to each other; the elastic part 32 is provided with an opening 33; the fixed part 31 is fixedly arranged relative to the air flow channel structure 15; the air flow channel structure 15 includes a guiding arc surface 21; wherein, when in the first matching state, the opening 33 is closed, the elastic part 32 is separated from the guiding arc surface 21, and the second air flow channel 13 is opened; when in the second matching state, the opening 33 is opened, the elastic part 32 is attached to the guiding arc surface 21, and the second air flow channel 13 is closed.

[0038] Further, along the direction from the first end 11 to the second end 12, the diameter surrounded by the guiding arc surface 21 gradually increases.

[0039] Further, the elastic part 32 is made of a flexible material.

[0040] Further, the valve plate in the traditional drying device 100 is usually of a sheet structure. The design of the elastic part 32 and the opening 33 of the elastic part 32 of the duckbill valve 30 enables the drying device 100 to flexibly change its state under different air pressure differences; when in the first matching state, the opening 33 is closed, the elastic part 32 is separated from the guiding arc surface 21, and the second guiding channel is opened for the high-temperature and high-humidity gas to be quickly discharged; when in the second matching state, the opening 33 is opened, the elastic part 32 is attached to the guiding arc surface 21, and the second air flow channel 13 is closed to prevent the gas from entering the vehicle lamp through the second air flow channel 13; this structure can effectively realize the dehumidification function of the drying device 100, enhance its adaptability and reliability under different working conditions, and further improve the waterproof performance of the drying device 100 and the service life of the vehicle lamp.

[0041] Preferably, the drying device 100 further includes a first cover assembly 40 which is arranged on the side of the duckbill valve 30 away from the air flow channel structure 15 and is used for pressing the duckbill valve 30.

[0042] Further, there is an interference fit between the first cover assembly 40 and the fixed part 31.

[0043] Furthermore, considering the actual working conditions, the duckbill valve 30 may become loose or shift in position due to factors such as vibration and temperature changes, resulting in problems such as poor sealing and gas leakage, which affect the normal operation and performance stability of the drying device 100. By setting the first cover assembly 40 to press tightly against the duckbill valve 30, a certain pressure can be exerted on the duckbill valve 30 to make it closely fit at the end of the air flow channel structure 15, thereby improving the fixing stability of the duckbill valve 30. This pressing method can effectively prevent the duckbill valve 30 from loosening or shifting in position during use, enhance the sealing performance of the drying device 100, ensure that the drying device 100 can normally achieve the control and sealing functions of gas flow under various air pressure differences, improve the quality and performance stability of the product, reduce the risk of failures caused by component loosening, and lower the maintenance cost.

[0044] Preferably, the drying device 100 further includes a first breathable membrane 50, and the first breathable membrane 50 is disposed at one end of the first cover assembly 40 away from the air flow channel structure 15.

[0045] Furthermore, by setting the first breathable membrane 50 at one end of the first cover assembly 40 away from the air flow channel structure 15, it can effectively block the entry of external water vapor into the drying device 100. In this way, even in a high-humidity environment, the external water vapor cannot enter the interior of the drying device 100, thereby further improving the waterproof performance of the drying device 100. At the same time, the first breathable membrane 50 allows gas to pass through normally and does not affect the gas exchange function of the drying device 100, ensuring the normal operation of the drying device 100 in adjusting the air pressure difference and controlling the gas flow rate, creating a drier and more stable environment inside the vehicle lamp, extending the service life of the vehicle lamp, and improving its reliability in harsh environments.

[0046] Preferably, a second breathable membrane 60 is provided on one side of the housing 10 away from the duckbill valve 30, and a receiving space for containing a desiccant is formed between the second breathable membrane 60 and the housing 10.

[0047] Furthermore, by setting the second breathable membrane 60 on one side of the housing 10 away from the duckbill valve 30 and forming a receiving space for containing a desiccant between the second breathable membrane 60 and the housing 10, this design provides a dedicated area for placing the desiccant, enabling the desiccant to come into full contact with the gas inside the vehicle lamp and effectively absorb the water vapor generated inside. The second breathable membrane 60 allows the water vapor to pass through, and the desiccant can adsorb this water vapor, thereby keeping the interior of the vehicle lamp dry. At the same time, this structure separates the desiccant from other components of the vehicle lamp, preventing the desiccant from scattering or coming into contact with other components, ensuring the cleanliness inside the vehicle lamp and the adsorption efficiency of the desiccant. In addition, the design of the receiving space also facilitates the installation and replacement of the desiccant, enabling the drying device 100 to effectively perform its moisture absorption function for a long time, improving the reliability and service life of the vehicle lamp, and reducing the risk of failures caused by internal water accumulation.

[0048] Preferably, the drying device 100 further includes a second cover assembly 70, and the second cover assembly 70 is arranged at one end of the second breathable membrane 60 away from the housing 10; the second cover assembly 70 is provided with air holes 71.

[0049] Furthermore, by arranging the second cover assembly 70 at one end of the second breathable membrane 60 away from the housing 10 and providing air holes 71 on the second cover assembly 70, a good protective effect can be achieved on the second breathable membrane 60. The second cover assembly 70 can prevent external objects from directly hitting the second breathable membrane 60, avoiding its damage or deformation. At the same time, it can also prevent dust, pollutants, etc. from adhering to the surface of the second breathable membrane 60, affecting its air permeability. The design of the air holes 71 allows gas to pass through normally, ensuring unobstructed water vapor exchange between the desiccant and the gas inside the vehicle lamp, thereby ensuring the normal moisture absorption function of the drying device 100. This structure enhances the durability and reliability of the drying device 100 and extends its service life.

[0050] Preferably, an embedding part 72 is provided at one end of the second cover assembly 70 close to the housing 10, the embedding part 72 is embedded into the air flow channel structure 15, and the embedding part 72 is provided with a circulation hole 721 communicating with the first air flow channel 20.

[0051] Furthermore, by arranging the embedding part 72 at one end of the second cover assembly 70 close to the housing 10, the embedding part 72 is embedded into the air flow channel structure 15, and the embedding part 72 is provided with a circulation hole 721 communicating with the first air flow channel 20, it ensures the close connection between the second cover assembly 70 and the housing 10 while ensuring the conduction of the first air flow channel 20.

[0052] Preferably, the housing 10 includes a protruding part 80, and the protruding part 80 is arranged around the outer circumference of the housing 10. When the drying device 100 is matched with the vehicle lamp, the protruding part 80 abuts against the vehicle lamp.

[0053] Furthermore, by arranging the protruding part 80 around the outer circumference of the housing 10, when the drying device 100 is matched with the vehicle lamp, the protruding part 80 abuts against the vehicle lamp, preventing the drying device 100 from being embedded into the interior of the vehicle lamp and being difficult to take out, making the installation and disassembly more convenient.

[0054] Preferably, the drying device 100 further includes a seal 90, and the seal 90 is sleeved on the outer circumference of the housing 10, and the seal 90 abuts against the protruding part 80.

[0055] Furthermore, the seal 90 is sleeved on the housing 10. When the drying device 100 is connected to the vehicle lamp, the seal 90 is arranged between the protruding part 80 and the vehicle lamp, playing a sealing role to prevent dust and water vapor from entering the interior of the drying device 100, and improving the service life of the drying device 100.

[0056] Further, the drying device 100 further includes a clamping portion 91, and the clamping portion 91 is disposed on the outer circumferential side of the housing 10; the drying device 100 is rotationally clamped with the vehicle lamp through the clamping portion 91.

[0057] On the other hand, an embodiment of the present invention further provides a vehicle lamp, which includes the drying device 100 of any technical solution of the present invention. Correspondingly, in this embodiment, the technical effects corresponding to any technical solution in the above embodiment can be achieved, and details are not described herein again.

[0058] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be subject to the scope defined by the claims.

Claims

1. A drying device, characterized in that, The drying device has opposite first end (11) and second end (12). When the drying device is cooperated with a vehicle headlamp, the first end (11) is located in the internal environment of the vehicle headlamp, and the second end (12) is located in the external environment of the vehicle headlamp. The drying device includes: A housing (10), and an air flow channel structure (15) forming a first air flow channel (20) is arranged in the housing (10); A duckbill valve (30), the outside of the duckbill valve (30) is cooperated with the air flow channel structure (15) to form a second air flow channel (13); Wherein, when the air pressure in the internal environment is greater than the air pressure in the external environment, the duckbill valve (30) and the air flow channel structure (15) form a first cooperation state; When in the first cooperation state, the gas flows out after passing through the first air flow channel (20) and the second air flow channel (13) in sequence.

2. The drying device according to claim 1, wherein A third air flow channel (14) is arranged inside the duckbill valve (30), and the third air flow channel (14) is communicated with the first air flow channel (20) through an opening (33) of the duckbill valve (30); Wherein, when the air pressure in the external environment is greater than the air pressure in the internal environment, the opening (33) is opened, and the duckbill valve (30) and the air flow channel structure (15) form a second cooperation state; When in the second cooperation state, the gas flows in after passing through the third air flow channel (14), the opening (33) and the first air flow channel (20) in sequence.

3. The drying device according to claim 2, wherein The duckbill valve (30) includes a fixed part (31) and an elastic part (32) connected to each other; The elastic part (32) is provided with the opening (33); The fixed part (31) is fixedly arranged relative to the air flow channel structure (15); The air flow channel structure (15) includes a guiding arc surface (21); Wherein, when in the first cooperation state, the opening (33) is closed, the elastic part (32) is separated from the guiding arc surface (21), and the second air flow channel (13) is opened; When in the second cooperation state, the opening (33) is opened, the elastic part (32) is attached to the guiding arc surface (21), and the second air flow channel (13) is closed.

4. The drying device according to claim 1, wherein The drying device further includes a first cover assembly (40), and the first cover assembly (40) is arranged on a side of the duckbill valve (30) away from the air flow channel structure (15) for pressing the duckbill valve (30).

5. The drying device according to claim 4, wherein The drying device further includes a first breathable film (50), and the first breathable film (50) is arranged at an end of the first cover assembly (40) away from the air flow channel structure (15).

6. The drying device according to claim 1, wherein On one side of the housing (10) away from the duckbill valve (30), a second breathable membrane (60) is provided, and a receiving space for containing a desiccant is formed between the second breathable membrane (60) and the housing (10).

7. The drying device according to claim 6, wherein the drying device further includes a second cover assembly (70), and the second cover assembly (70) is disposed at one end of the second breathable membrane (60) away from the housing (10); the second cover assembly (70) is provided with a ventilation hole (71).

8. The drying device according to claim 7, wherein one end of the second cover assembly (70) close to the housing (10) is provided with an embedding portion (72), the embedding portion (72) is embedded into the air flow channel structure (15), and the embedding portion (72) is provided with a through hole (721) communicated with the first air flow channel (20).

9. The drying device according to claim 1, wherein the housing (10) includes a convex portion (80), the convex portion (80) is disposed around the outer peripheral side of the housing (10), and when the drying device is matched with the vehicle lamp, the convex portion (80) abuts against the vehicle lamp.

10. A vehicle lamp, characterized in that, Comprising: The drying device according to any one of claims 1-9.

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