Automotive headlamp with detachable ventilation and dehumidification device

Abstract

The invention aims to provide an automotive headlamp with a detachable ventilation and dehumidification device. The automotive headlamp can have ventilation and dehumidification functions and can be detached and maintained conveniently. The automotive headlamp with the detachable ventilation and dehumidification device comprises a headlamp shell and the detachable ventilation and dehumidification device, the detachable ventilation and dehumidification device comprises a body and a porous cover fixed on the body through a screw, a cavity is formed between the body and the porous cover, and a drying agent is placed in the cavity. The body of the ventilation and dehumidification device is screwed in a mounting hole of the headlamp shell through screw-thread fit, the body is further provided with a ventilation pipe penetrating the body and the porous cover, and the end portion of the ventilation pipe is covered with a waterproof ventilation cloth. The automotive headlamp has the advantages that through the arranged ventilation and dehumidification device, ventilation and dehumidification effect is guaranteed, the automotive headlamp is enabled to have good heat dissipation and defogging functions, replacement of the drying agent is facilitated, and practicality is good.

Description

Technical field [0001] The invention relates to an automobile headlight with a detachable air-permeable dehumidification device. Background technique [0002] Generally, in automotive lamps, if the entire components are sealed in a protective shell, although it can effectively prevent the intrusion of water vapor, after the sealed car lamp is lit, the air in the car lamp is heated and expanded, which makes it easy to seal the car lamp. After the interface is opened and the lamp is extinguished, due to the temperature drop of the internal components of the lamp, the external air pressure is higher than the internal pressure of the lamp. The external air and water vapor can easily enter the lamp from the opening at the sealed interface, thereby endangering the internal light-emitting components. Stability and normal operation. Moreover, the temperature of the car lamps is too high after they are lit, and if there is no heat exchange with the outside, it will greatly reduce the lif...

AI Technical Summary

Problems solved by technology

[0002] Usually, on automotive lamps and lanterns, if the entire component is sealed in a protective shell, although it can effectively prevent the intrusion of water vapor, after the sealed lamp is lit, the air in the lamp is heated and expands, which can easily seal the lamp. After the interface is opened and the lamp is turned off, due to the temperature drop of the internal components of the lamp, the external air pressure is higher than the internal pressure of the lamp, and the external air and water vapor can easily enter the lamp from the opening at the sealed interface, thereby endangering the integrity of the internal light-emitting components. Stability and normal operation

Moreover, the temperature of the car lamps is too high after being lit. If there is no heat exchange with the outside world, the life of the lamps will be greatly reduced and the performance of the lamps will be damaged.

In the existing traditional vehicles, the air holes fixed on the housing are used on the lights to exchange heat and gas convection with the outside world, but this structure does not take into account the drying problem inside the lights, and water vapor easily enters the air through the air holes. inside the lights

Some companies now make the vent hole of the car light into a waterproof and breathable structure. Although it can effectively prevent water vapor from entering the car light and solve the heat dissipation problem of the car light at the same time, in the daily use process, the inside of the car light will still be damaged due to poor sealing. Severe and other reasons into the water vapor, affecting the lighting effect of the lights

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