Airflow sensor and oleophobic and hydrophobic treatment method

Abstract

The invention discloses an airflow sensor and an oleophobic and hydrophobic treatment method. The airflow sensor comprises an airflow sensor body, which is provided with an airflow hole and an air inlet hole, wherein the airflow hole is provided with an air outlet hole protective film, the air outlet hole protective film covers the airflow hole, an air inlet hole protective film is arranged on theair inlet hole, the air inlet hole protective film covers the air inlet hole, and the air outlet hole protective film and the air inlet hole protective film are protective films subjected to oleophobic and hydrophobic treatment. The oleophobic and hydrophobic treatment method comprises primary oleophobic and hydrophobic treatment and secondary oleophobic and hydrophobic treatment. Compared with the prior art, the oleophobic and hydrophobic treatment method of the invention has the advantages that liquid such as water, smoke oil and the like does not remain on the protective film or in the peripheral area, normal inlet and outlet of airflow are not hindered, the airflow sensor can be used in a harsh environment, such as still work normally after being immersed in smoke oil for 192 hours, the technological process is simple, spraying or soaking operation can be conducted on a production line, the drying time is short, or the airflow sensor can be directly dried at the room temperature.

Description

technical field [0001] The invention belongs to the field of sensors, and in particular relates to an airflow sensor and an oil-repellent and water-repellent treatment method. Background technique [0002] Airflow sensors are widely used in electronic cigarettes, medical atomization and other devices. During the working process, dust, water, oil and other substances in the environment where the airflow sensor is located can easily enter the interior of the airflow sensor and attach to the diaphragm or PCB, changing the The normal working environment of the airflow sensor will be reduced, the performance of the airflow sensor will be reduced, and serious failure will occur and it will not work normally. [0003] Such as figure 1 , figure 2 , image 3 As shown, there are two common airflow sensors: one airflow sensor includes an airflow sensor body 1, the airflow sensor body 1 is a hollow cylindrical tube, the top of the airflow sensor body 1 is provided with an airflow ho...

AI Technical Summary

Problems solved by technology

[0005] Take the e-cigarette using the above-mentioned airflow sensor as an example. During the working process, the e-cigarette will form condensed e-liquid and the e-liquid leaked from the pod. Make it not work properly, causing it to malfunction, greatly reducing the service life of the electronic cigarette

[0006] In order to solve the above-mentioned technical problems, generally, those skilled in the art arrange one deck dust-proof net 13 on the air inlet 3, the airflow hole 2 of airflow sensor, yet, its improvement effect is limited, and there are still problems, such as Figure 4 , Figure 5 As shown, liquid residues 12 such as water and smoke oil adhere to the dust-proof net 13, resulting in partial or complete blockage of the air holes of the dust-proof net, and the airflow cannot pass through the airflow sensor or only a small amount of airflow passes through, resulting in failure to work normally; secondly, Liquid residue 12 such as water and smoke oil will still enter the airflow sensor from the sides of the air intake hole 3 and the airflow hole 2

[0007] At present, no more efficient solution has been found to solve the problem of dust, water, oil and other substances flowing into the airflow sensor through the air channel

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