Automobile lamp plastic lamp shell anti-fog ventilation and heat dissipation structure
By incorporating air inlets, baffles, vents, and a waterproof and breathable membrane into the plastic lamp housing, the problem of fog condensation caused by the pressure difference between the inside and outside of the plastic lamp housing is solved. This achieves directional ventilation, fog prevention, and heat dissipation, improving the lighting clarity, heat dissipation efficiency, and reliability of the lamp.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGGUAN HOWE TECH CO LTD
- Filing Date
- 2025-07-09
- Publication Date
- 2026-08-04
AI Technical Summary
When the existing plastic lamp housing is not in use, the pressure difference between the inside and outside causes humid air to be drawn in, condensing into water vapor, which affects the lighting effect and the reliability of the lamp.
Design a plastic lamp housing structure for automotive lights that prevents fogging, provides ventilation and heat dissipation. The structure uses an air inlet, a baffle plate, an air outlet, and a waterproof and breathable membrane to achieve directional ventilation and prevent fogging. It guides airflow to remove moisture and promotes heat dissipation, while maintaining internal and external air pressure balance and preventing moisture and dust from entering.
It significantly improves the lighting clarity, heat dissipation efficiency, and reliability of plastic-cased automotive lights under various operating conditions, ensures the internal dryness of the lights, prevents fogging and dust intrusion, and enhances the overall performance of the lights.
Smart Images
Figure CN224593125U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive lamp plastic housing technology, and in particular to an anti-fog, ventilation and heat dissipation structure for automotive lamp plastic housing. Background Technology
[0002] As a key component ensuring driving safety, the performance of automotive lights directly affects the clarity of driving visibility at night or in inclement weather. Following the trend towards lightweight and personalized automotive design, plastic materials, with their advantages of being lightweight, easy to mold, relatively inexpensive, and capable of achieving a wide range of aesthetic designs, have become the mainstream choice for manufacturing automotive light housings, widely used in headlights, taillights, and daytime running lights.
[0003] However, most existing plastic lamp housings have a significant drawback: when the lights are not in use, the pressure difference between the inside and outside causes humid air to be drawn into the housing, where it condenses into water vapor. This not only seriously interferes with light projection and affects the lighting effect, but also reduces the long-term reliability of the lamps.
[0004] Therefore, those skilled in the art have provided an anti-fog, ventilation, and heat dissipation structure for automotive lamp plastic housings to solve the problems mentioned in the background art. Utility Model Content
[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing an anti-fog, ventilation, and heat dissipation structure for automotive lamp plastic housings. This structure achieves directional ventilation and anti-fog through an air inlet, a guide plate, an air outlet, and two waterproof and breathable membranes. It guides airflow to preferentially contact areas prone to fogging and remove moisture, while simultaneously promoting heat dissipation. The breathable membranes also enable a breathing function, ensuring internal and external air pressure balance and preventing fog formation while effectively blocking the intrusion of moisture and dust. This significantly improves the lighting clarity, heat dissipation efficiency, and reliability of automotive lamps with plastic housings under various operating conditions.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] A fog-proof, ventilation, and heat dissipation structure for a car lamp plastic housing includes a connecting base and a housing. An air intake shell is connected to one end face of the housing, and a dustproof mesh is provided on one end face of the air intake shell. Multiple through holes are opened on one end face of the air intake shell, and multiple air inlets are opened on one end face of the housing, with the air inlets corresponding to the through holes. A second waterproof and breathable membrane is connected to one end face of the housing inside. Air outlets are opened on one side of both the upper and lower end faces of the housing. A first waterproof and breathable membrane is provided on one side of both the upper and lower end faces of the housing inside. A guide plate is provided on one side of the housing inside.
[0008] Through the above technical solution, the structure achieves directional ventilation and anti-fogging through air inlet, guide plate, air outlet and two waterproof and breathable membranes. It guides airflow to preferentially contact areas prone to fogging and remove moisture, while promoting heat dissipation. It also uses breathable membranes to achieve breathing function. While ensuring the balance of internal and external air pressure and preventing fog formation, it effectively blocks the intrusion of water vapor and dust, thereby significantly improving the lighting clarity, heat dissipation efficiency and reliability of plastic lamp housing automotive lamps under various working conditions.
[0009] Furthermore, a bulb and a reflector are provided in the middle of one end face of the connector, with the reflector located outside the bulb;
[0010] Through the above technical solution, the integrated arrangement of the bulb and reflector bowl optimizes the relative position of the light source and the reflective surface, ensuring that the light can be reflected efficiently and accurately, thereby improving the focusing effect and lighting uniformity of the lamp and ensuring good lighting quality.
[0011] Furthermore, threaded holes are provided at the four corners of one side end face of the housing, and screws are threaded at the four corners of the inside of the connecting seat, with one end of the screw threaded into the inside of the threaded hole.
[0012] The above technical solution uses screws to firmly connect the connector to the housing, which is simple and reliable, easy to install and disassemble, and ensures high-strength fixation between the two, effectively preventing loosening caused by vibration or external force, and improving the overall structural stability of the lamp.
[0013] Furthermore, the second waterproof and breathable membrane is fitted to the air inlet;
[0014] Through the above technical solution, the second waterproof and breathable membrane is tightly attached to the air inlet, which can not only allow the air pressure generated by temperature changes inside the housing to be balanced with the outside, preventing excessive pressure difference between the inside and outside from forcibly entering the humid air, but also effectively block external moisture and dust from directly intruding, playing a key role in moisture and dust prevention, and ensuring a dry environment inside the lamp housing from the air inlet end.
[0015] Furthermore, the two first waterproof and breathable membranes are fitted together with the air vents;
[0016] The above technical solution ensures a reliable seal between the first waterproof and breathable membrane and the vent, allowing heat and moisture generated inside the lamp to dissipate outward through the membrane, while preventing external moisture and impurities from entering. This promotes air circulation and heat dissipation inside the housing, effectively prevents internal fogging and moisture accumulation, and improves the reliability of the lamp.
[0017] This utility model has the following beneficial effects:
[0018] 1. This utility model proposes an anti-fog ventilation and heat dissipation structure for automotive lamp plastic housings. This structure achieves directional ventilation and anti-fog through an air inlet, a guide plate, an air outlet, and two waterproof and breathable membranes. It guides airflow to preferentially contact areas prone to fogging and remove moisture, while promoting heat dissipation. It also utilizes the breathable membranes to achieve a breathing function. While ensuring the balance of internal and external air pressure and preventing fog formation, it effectively blocks the intrusion of water vapor and dust, thereby significantly improving the lighting clarity, heat dissipation efficiency, and reliability of automotive lamps with plastic housings under various working conditions. Attached Figure Description
[0019] Figure 1 This is an overall isometric view of an anti-fog, ventilation, and heat dissipation structure for a plastic lamp housing for an automotive lamp, as proposed in this utility model.
[0020] Figure 2 This is a schematic diagram of the connecting seat and the housing of the anti-fog, ventilation and heat dissipation structure for a plastic lamp housing of an automotive lamp proposed in this utility model;
[0021] Figure 3 This is a cross-sectional view of the housing of an anti-fog, ventilation and heat dissipation structure for a plastic lamp housing for an automotive lamp, as proposed in this utility model.
[0022] Figure 4 This is a diagram illustrating the internal structure of a plastic lamp housing for automotive lights that provides anti-fog ventilation and heat dissipation.
[0023] Explanation of reference numerals in the attached figures:
[0024] 1. Connector; 2. Housing; 3. Screw; 4. Bulb; 5. Reflector; 6. Vent; 7. First waterproof and breathable membrane; 8. Threaded hole; 9. Deflector plate; 10. Second waterproof and breathable membrane; 11. Inlet shell; 12. Dustproof mesh; 13. Through hole; 14. Inlet. Detailed Implementation
[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of specific embodiments. Obviously, the described specific embodiments are only a part of the specific embodiments of the present invention, and not all of them. Based on the specific embodiments of the present invention, all other specific embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0026] Reference Figure 1-4This utility model provides a specific embodiment: a car lamp plastic lamp housing anti-fog ventilation and heat dissipation structure, including a connecting seat 1 and a housing 2. An air inlet shell 11 is connected to one end face of the housing 2. A dustproof net 12 is provided on one end face of the air inlet shell 11. Multiple through holes 13 are opened on one end face of the air inlet shell 11. Multiple air inlets 14 are opened on one end face of the housing 2. The air inlets 14 correspond to the through holes 13. A second waterproof and breathable membrane 10 is connected to one end face of the inside of the housing 2. Air outlet holes 6 are opened on one side of both the upper and lower end faces of the housing 2. A first waterproof and breathable membrane 7 is provided on one side of both the upper and lower end faces of the inside of the housing 2. A guide plate 9 is provided on one side of the inside of the housing 2.
[0027] This structure, through air inlet 14, guide plate 9, air outlet 6 and two waterproof and breathable membranes, achieves directional ventilation and anti-fogging, guides airflow to preferentially contact areas prone to fogging to remove moisture, promotes heat dissipation, and utilizes the breathable membranes to achieve a breathing function. While ensuring the balance of internal and external air pressure and preventing fog formation, it effectively blocks the intrusion of water vapor and dust, thereby significantly improving the lighting clarity, heat dissipation efficiency and reliability of plastic lamp housing automotive lamps under various working conditions.
[0028] A bulb 4 and a reflector bowl 5 are arranged in the middle of one side end face of the connector 1. The reflector bowl 5 is located outside the bulb 4. The integrated arrangement of the bulb 4 and the reflector bowl 5 optimizes the relative position of the light source and the reflective surface, ensuring that the light can be reflected efficiently and accurately, thereby improving the focusing effect and lighting uniformity of the lamp and ensuring good lighting quality. Threaded holes 8 are provided at the four corners of one side end face of the housing 2. Screws 3 are threaded at the four corners inside the connector 1, with one end of the screw 3 threaded into the threaded hole 8. The connector 1 and housing 2 are firmly connected by the screws 3. The structure is simple and reliable, easy to install and disassemble, and ensures high-strength fixation between the two, effectively preventing loosening due to vibration or external force, improving the overall structural stability of the lamp, and providing secondary protection. The water-permeable membrane 10 is attached to the air inlet 14, and the second waterproof and breathable membrane 10 is tightly attached to the air inlet 14. This allows the air pressure inside the housing 2 caused by temperature changes to be balanced with the outside, preventing excessive pressure difference between the inside and outside from forcibly entering the humid air. It also effectively blocks external moisture and dust from directly intruding, playing a key role in moisture and dust prevention. It ensures a dry environment inside the lamp housing from the air inlet end. The two first waterproof and breathable membranes 7 are attached to the air outlet 6, ensuring a reliable seal between the first waterproof and breathable membranes 7 and the air outlet 6. This allows the heat and moisture generated inside the lamp to dissipate to the outside through the breathable membrane, while external moisture and impurities are difficult to enter. This promotes air circulation and heat dissipation inside the housing 2, and effectively prevents internal fogging and moisture absorption, thus improving the reliability of the lamp.
[0029] Working principle: When the car is running, outside air is first guided into the air intake shell 11 on the side of the headlight, and then enters the plastic headlight housing through the through hole 13 on the housing 2 that matches the air intake hole 14. As it enters, it passes through the second waterproof and breathable membrane 10 to filter out water droplets. The filtered clean air is then precisely guided by the internal guide plate 9 to the bulb 4 and the high-temperature area around it, efficiently absorbing and carrying away the excess heat and accumulated moisture generated by the operation of the bulb 4, and then discharged through the air outlet 6, thereby forming a continuous directional ventilation and heat dissipation cycle, effectively preventing internal overheating and fog condensation, and ensuring clear lighting and stable operation of the headlight.
[0030] The following points should be noted in this article:
[0031] 1. The accompanying drawings of the embodiments disclosed herein only relate to the structures involved in the embodiments disclosed herein; other structures can be referred to in general design.
[0032] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.
[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing specific embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A fog-proof, ventilated, and heat-dissipating structure for a car lamp plastic housing, comprising a connecting base (1) and a housing (2), characterized in that: An air inlet shell (11) is connected to one side of the housing (2). A dustproof net (12) is provided on one side of the air inlet shell (11). Multiple through holes (13) are opened on one side of the air inlet shell (11). Multiple air inlets (14) are opened on one side of the housing (2). The air inlets (14) correspond to the through holes (13). A second waterproof and breathable membrane (10) is connected to one side of the interior of the housing (2). An air outlet (6) is opened on one side of both the upper and lower end faces of the housing (2). A first waterproof and breathable membrane (7) is provided on one side of both the upper and lower end faces of the interior of the housing (2). A guide plate (9) is provided on one side of the interior of the housing (2).
2. The anti-fog, ventilation, and heat dissipation structure for automotive lamp plastic housing according to claim 1, characterized in that: A bulb (4) and a reflector bowl (5) are provided in the middle of one side end face of the connector (1), and the reflector bowl (5) is located outside the bulb (4).
3. The anti-fog, ventilation, and heat dissipation structure for automotive lamp plastic housing according to claim 1, characterized in that: The housing (2) has threaded holes (8) at the four corners of one side end face, and screws (3) are threaded at the four corners of the inside of the connecting seat (1), with one end of the screw (3) threaded into the inside of the threaded hole (8).
4. The anti-fog, ventilation, and heat dissipation structure for automotive lamp plastic housing according to claim 1, characterized in that: The second waterproof and breathable membrane (10) is attached to the air inlet (14).
5. The anti-fog, ventilation, and heat dissipation structure for automotive lamp plastic housing according to claim 1, characterized in that: The two first waterproof and breathable membranes (7) are attached to the air vents (6).