Automobile rearview mirror capable of automatically removing rain, fog and water

Abstract

A disclosed automobile rearview mirror capable of automatically removing rain, fog and water comprises a first shell and a mirror surface installed at an opening of the first shell, a cavity formed bythe first shell and a mirror surface communicates with the atmosphere, at least one piezoelectric pump is arranged in the cavity, an air inlet of the piezoelectric pump communicates with the cavity,and an exhaust port of the piezoelectric pump communicates with an air blowing port facing the mirror surface through an air bag provided with an air bag exhaust valve plate. The automobile rearview mirror further comprises a piezoelectric energy harvester assembly arranged in the cavity, a temperature and humidity sensor, a circuit control box provided with a control circuit, and a pressure sensor arranged in the air bag, and the piezoelectric pump, the piezoelectric energy harvester assembly, the temperature and humidity sensor and the pressure sensor are electrically connected with the control circuit. In the running process of an automobile, the piezoelectric energy harvester assembly converts jolt and other energy generated in the running process of the automobile into electric energyto be provided for the piezoelectric pump through the direct piezoelectric effect, an external power source is not needed, energy is saved, and the automobile rearview mirror is good in rain and fogwater removing effect and high in working reliability.

Description

technical field [0001] The invention relates to the technical field of auto parts, in particular to an auto rearview mirror for automatically removing rain and fog. Background technique [0002] The rearview mirror is an important part of the car, and it is the main tool for the driver to obtain external information such as the rear, side and bottom of the car, and plays a vital role in the driving safety of the driver. However, in rainy or foggy days, the rain or fog on the rearview mirror of the car will affect the driver's observation of the rear situation of the car, causing certain potential safety hazards. [0003] There are many kinds of devices for automatically removing rain and mist in the prior art automobile rearview mirror, and the structures are different, but there are still following deficiencies, such as: some adopt the windward opening channel, and use the wind to blow the rainwater and fog on the mirror when driving. However, it is difficult to control th...

AI Technical Summary

Problems solved by technology

However, in rainy or foggy days, the rain or fog on the car rearview mirror will affect the driver's observation of the situation behind the car, causing certain safety hazards

[0003] There are many kinds of devices for automatically removing rain and mist in the prior art automotive rearview mirrors, and the structures are different, but there are still following deficiencies, such as: some adopt the windward opening channel, and use the wind to blow the rainwater and fog on the mirror when driving. However, the size of the channel and the path of the pipeline are difficult to control, and the effect of blowing water with water vapor is not ideal, and the volume of the rearview mirror is relatively large

Some use electric heating to remove rain and fog, the working stability is not ideal, and the long-term high temperature affects the service life of the rearview mirror itself, especially after the water is removed, the dust remains on the mirror surface, which also affects the line of sight

Others use vibration methods such as ultrasonic waves to remove rain and fog, but the reliability of the work is not strong, and the rain and fog still block the line of sight during the vibration.

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