Demisting system for car lamp

Abstract

The utility model discloses a car lamp demisting system which comprises a shell, a demister is arranged in an inner cavity of the shell, an external thread groove in threaded connection with a car lamp rear cover is formed in one end of the shell, a sealing ring is arranged between the shell and the car lamp rear cover, a protruding ring is arranged at the other end of the shell, and the protruding ring is connected with the demister. A through opening is formed in the position, located in the protruding ring, of the surface of the shell, and a valve body is arranged in the protruding ring. The demisting system has the characteristics of high reversible moisture absorption rate, high reversible speed, weakening of external environment influence and the like, so that the demisting system has relatively large humidity adjusting freedom degree, the interior of the lamp can be kept dry under severe working conditions, an effective moisture-proof and moisture-releasing system is established between the interior and the exterior of the lamp body, and the fog-proof and fog-absorbing capabilities are strong.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of car light, especially relates to a car light defogging system. BACKGROUND

[0002] The car light fogging not only influences the lighting effect, but more importantly, threatens the service life of the bulb and the safety of the lamp circuit. Moreover, the long-term condensation of water vapor on the surface of the car light reflector and lens can cause a series of consequences such as corrosion of the car light material, accelerated aging deformation, and destruction of the optical control effect.

[0003] For the car light fog, the conventional solutions mainly include the following. ① Bending pipe air permeation: through the selection of a better air duct by thermal design, the air pressure difference caused by the heat field during lighting is used to drive the free exchange of air inside the lamp with the outside, realizing the function of faster fog dissipation. The disadvantage is that it is not waterproof and the dustproof effect is poor. ② Waterproof air permeation assembly: the air permeation film patch uses the diffusion principle to diffuse the water vapor inside the lamp to the outside of the lamp as the water vapor concentration inside the lamp rises during lighting; the air permeation plug uses the air convection formed by the air permeation hole opened at a suitable position of the lamp to make the water vapor inside the lamp exhaust to the outside of the lamp. The disadvantage is that a large number of air permeation plugs are used, and the problem of fogging in the dead zone and low temperature area cannot be solved. ③ Anti-fog coating: the hydrophilic group forms an anti-fog film on the surface of the coating film, which is wet and expanded on the inner surface of the lamp shell, forming a smooth water film to prevent the generation of fog. The disadvantage is that when the humidity is high, it will form a flow and accumulate water. ④ Desiccant: the physical desiccant has a generally low moisture absorption rate, is short-acting, and is reversible under certain conditions; the chemical desiccant has a generally high moisture absorption rate, but is irreversible and sometimes effective. In order to ensure the defogging effect of the car light, the above methods often need to be used in combination, which not only complicates the design of the lamp, but also increases the manufacturing process of the lamp, thereby greatly increasing the cost of the car light. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a car light defogging system to solve the technical problems proposed in the background art.

[0005] To achieve the above-mentioned purpose, the specific technical scheme of the utility model is as follows: a car light defogging system, comprising a shell, a defogger is arranged in the inner cavity of the shell, one end of the shell is provided with an external thread groove which is threadedly connected with a rear cover of the car light, a sealing ring is arranged between the shell and the rear cover of the car light, the other end of the shell is provided with a convex ring, a through port is arranged on the surface of the shell in the convex ring, a valve body is arranged in the convex ring, a first ePTFE film is arranged on the outer side of the valve body in the convex ring, the defogger comprises a cylindrical sleeve, a desiccant is arranged in the inner cavity of the cylindrical sleeve, a circular ring is clamped on both ends of the cylindrical sleeve, and a second ePTFE film is arranged in the circular ring.

[0006] Preferably, a pressing ring is arranged on one side of the sealing ring, and the pressing ring is in contact with the surface of the defogger.

[0007] Preferably, the housing is a cavity structure with one end open, and the inner wall of the closed end of the housing is provided with a plurality of protrusions arranged in a circumferential array.

[0008] Preferably, the inner wall of the housing is provided with four limiting strips arranged in a circumferential array, and the surface of the demister is provided with four limiting grooves that correspond one-to-one with the limiting strips. The size of the limiting strips matches the size of the limiting grooves, and the limiting strips and limiting grooves are slidably connected.

[0009] Preferably, a sealing ring is provided at the inner edge of the side wall of the annulus, and the outer diameter of the sealing ring matches the inner diameter of the cylindrical sleeve.

[0010] Preferably, the surface of the cylindrical sleeve is provided with anti-slip texture.

[0011] The vehicle headlight defogging system of this utility model has the following advantages:

[0012] 1. The high reversible moisture absorption rate, fast reversibility, and reduced influence of the external environment of this utility model enable the defogging system to have a large degree of freedom in humidity adjustment. It can keep the inside of the lamp dry under harsh working conditions and establish an effective "moisture prevention and dehumidification system" between the inside and outside of the lamp body, with strong anti-fogging and fog absorption capabilities.

[0013] 2. This utility model has a simple structure and is easy to assemble and disassemble, and can solve the problem of fogging inside the lamp quickly and easily. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 for Figure 1 A structural diagram from another perspective;

[0017] Figure 3 for Figure 1 Exploded view;

[0018] Figure 4 for Figure 3 A structural diagram from another perspective;

[0019] Figure 5 This is a schematic diagram of the shell structure in this utility model;

[0020] Figure 6 This is a schematic diagram of the demister in this utility model.

[0021] The markings in the diagram are as follows: 1. Housing; 2. External thread groove; 3. Demister; 4. Sealing ring; 5. Raised ring; 6. First ePTFE membrane; 7. Valve body; 8. Limiting strip; 9. Protrusion; 10. Pressing ring; 11. Port; 12. Cylindrical sleeve; 13. Limiting groove; 14. Circular ring; 15. Second ePTFE membrane; 16. Sealing ring; 17. Desiccant. Detailed Implementation

[0022] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0023] In the description of the embodiments of this utility model, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model 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 the embodiments of this utility model.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0026] The following disclosure provides many different implementations or examples for different structures of the embodiments of the present invention. To simplify the disclosure of the embodiments of the present invention, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of the present invention; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0027] To better understand the purpose, structure, and function of this utility model, the following description, in conjunction with the accompanying drawings, provides a more detailed account of a vehicle headlight defogging system.

[0028] like Figures 1-6 As shown, this utility model discloses a vehicle headlight defogging system, including a housing 1. A defogging device 3 is disposed in the inner cavity of the housing 1, and one end of the housing 1 is provided with an external threaded groove 2 that is threadedly connected to the rear cover of the headlight. A sealing ring 4 is provided between the housing 1 and the rear cover of the headlight, and a clamping ring 10 is provided on one inner edge of the sealing ring 4. The clamping ring 10 is in contact with the surface of the defogging device 3. When the housing 1 is threadedly connected to the rear cover of the headlight, the sealing ring 4 will be located between the housing 1 and the rear cover of the headlight. When the housing 1 and the rear cover of the headlight are tightened, the sealing ring 4 will be squeezed, so that the clamping ring 10 will be in close contact with the defogging device 3, thereby achieving the clamping and fixing of the defogging device 3, which can effectively prevent the defogging device 3 from loosening in the housing 1. The housing 1 is a cavity structure with one end open, and multiple protrusions 9 arranged in a circular array are provided on the inner wall of the closed end of the housing 1. With the arrangement of the protrusions 9, when the demister 3 is placed inside the housing 1, the inner side of the demister 3 will contact the protrusions 9, so that there is a gap between the demister 3 and the side of the housing 1 away from the opening, which is conducive to the rapid discharge of water vapor through the second ePTFE membrane 15 through the aperture 11 and the valve body 7. The ePTFE membrane, through its microporous structure, can achieve a combination of high-efficiency air permeability and waterproof and dustproof properties. The inner wall of the housing 1 is provided with four limiting strips 8 arranged in a circumferential array. The surface of the demister 3 is provided with four limiting grooves 13 that correspond one-to-one with the limiting strips 8. The size of the limiting strips 8 matches the size of the limiting grooves 13, and the limiting strips 8 and the limiting grooves 13 are slidably connected. Through the cooperation between the limiting strips 8 and the limiting grooves 13, the demister 3 plays a good limiting role during installation, which can effectively prevent the demister 3 from rolling inside the housing 1.

[0029] A protruding ring 5 is provided at the other end of the housing 1. A through-hole 11 is provided on the surface of the housing 1 within the protruding ring 5, and a valve body 7 is provided inside the protruding ring 5. A first ePTFE membrane 6 is provided on the outside of the valve body 7 within the protruding ring 5. The demister 3 includes a cylindrical sleeve 12, and a desiccant 17 is provided in the inner cavity of the cylindrical sleeve 12. Both ends of the cylindrical sleeve 12 are snapped with rings 14, and a second ePTFE membrane 15 is provided inside the rings 14. A sealing ring 16 is provided on the inner edge of the side wall of the rings 14. The outer diameter of the sealing ring 16 matches the inner diameter of the cylindrical sleeve 12. The sealing ring 16 on the rings 14 facilitates the sealing of the rings 14 with the cylindrical sleeve 12, and also facilitates its removal, making it convenient for the desiccant 17 to be replaced later. The surface of the cylindrical sleeve 12 is provided with anti-slip textures, which facilitates the rotation of the housing 1.

[0030] The working principle of this vehicle headlight defogging system is as follows: Without other ventilated structures, when the headlights are turned on, the positive pressure created by the increased temperature of the light source forces moisture out of the headlight body through valve 7 along with the hot air. The desiccant 17 inside the cylindrical sleeve 12 is a specialized, room-temperature reversible desiccant with a single-pass moisture absorption rate of 180% of its own mass. It exhibits "moisture absorption" and "desorption" depending on changes in ambient humidity and its own state, resulting in a high cumulative moisture absorption. Furthermore, after absorbing moisture, the desiccant remains in a loose, solidified state. After multiple "absorption-desorption" cycles, the effective reversible moisture absorption rate still reaches over 100%. When the headlights are turned off, external air enters the headlight after drying, thus maintaining a certain level of dryness inside the headlight. The high reversible moisture absorption rate, fast reversibility, and reduced influence of the external environment give this defogging system a high degree of freedom in humidity regulation, enabling it to maintain dryness inside the headlight even under harsh conditions, establishing an effective "moisture-proof and moisture-removing system" between the inside and outside of the headlight.

[0031] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A vehicle lamp defogging system characterized by: The utility model provides a kind of vehicle lamp defogging device, including shell (1), the shell (1) inner cavity is provided with defogger (3), and one end of the shell (1) is provided with with the outer thread groove (2) being connected with car lamp rear cover screw thread, and the shell (1) is provided with sealing ring (4) between car lamp rear cover, the other end of the shell (1) is provided with convex ring (5), the surface of the shell (1) is provided with through port (11) in convex ring (5), and the convex ring (5) is provided with valve body (7), the convex ring (5) is provided with first ePTFE membrane (6) in the outside of valve body (7); The defogger (3) includes a cylindrical sleeve (12), the inner cavity of the cylindrical sleeve (12) is provided with a desiccant (17), and the two ends of the cylindrical sleeve (12) are clamped with a circular ring (14), the circular ring (14) is provided with a second ePTFE membrane (15).

2. The system of claim 1, wherein: The sealing ring (4) is provided with a compression ring (10) along the inner side of one side, and the compression ring (10) is in contact with the surface of the defogger (3).

3. The system of claim 1, wherein: The shell (1) is a cavity structure with one end open, and the shell (1) is provided with a plurality of protrusions (9) arranged in a circular array on the inner wall of the closed end.

4. The system of claim 1, wherein: The inner wall of the shell (1) is provided with four limiting strips (8) arranged in a circular array, the surface of the defogger (3) is provided with four limiting grooves (13) corresponding to the limiting strips (8), the size of the limiting strips (8) is consistent with the size of the limiting grooves (13), and the limiting strips (8) are slidingly connected with the limiting grooves (13).

5. The defogging system for vehicle lights of claim 1, wherein: The side wall of the circular ring (14) is provided with a sealing ring (16) along the inner side, and the outer diameter of the sealing ring (16) is consistent with the inner diameter of the cylindrical sleeve (12).

6. The system of claim 1, wherein: The surface of the cylindrical sleeve (12) is provided with anti-slip lines.

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