Waterproof Membrane for Pneumatic Sensor in E-Cigarette Power Assembly
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Solution Overview
Problem
In electronic cigarettes, the accumulation of tobacco liquid and condensed water can lead to reduced sensor sensitivity and potential short-circuit damage due to their interaction with pneumatic sensors during the smoking process.
Innovation Solution
A power assembly with a waterproof and breathable membrane covering the airflow passage, which maintains connectivity between the air channel inside the external load and the airflow passage while preventing tobacco liquid and condensed water from penetrating into the internal cavity, thus protecting the pneumatic sensor without requiring a customized waterproof sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sensor is used to sense smoke to trigger atomization, then the electronic cigarette can atomize tobacco liquid efficiently, but the sensor is vulnerable to damage from tobacco liquid and condensed water penetration
Solution Approach 1:
The patent introduces a dust cloth as an intermediary component between the airflow passage and the pneumatic sensor. This dust cloth acts as a protective barrier that filters out tobacco liquid and condensed water while allowing air flow to reach the sensor, thus protecting the sensor from harmful substances without interfering with its sensing function
Solution Approach 2:
The dust cloth is implemented as a thin film structure that covers the airflow passage. This thin film allows air molecules to pass through while blocking larger particles of tobacco liquid and condensed water, providing protection to the sensor while maintaining the pneumatic sensing capability
2Reliability
If a dust cloth is provided on the sensor surface to prevent liquid penetration, then the sensor is protected from damage, but the sensor sensitivity is reduced
Solution Approach 1:
The dust cloth is strategically positioned to cover only the airflow passage area, not the entire sensor surface. This localized protection approach allows the sensor to maintain high sensitivity in regions not covered by the dust cloth while still being protected in the airflow passage region where liquid penetration is most problematic
3Speed
If the sensor is exposed to the airflow passage for direct sensing, then the sensing response is fast, but the sensor is easily contaminated by adsorbed tobacco liquid and condensed water
Solution Approach 1:
The dust cloth serves as a mediator that is positioned between the airflow passage and the sensor. It allows air to pass through quickly to the sensor for fast response while simultaneously blocking tobacco liquid and condensed water from reaching and contaminating the sensor surface
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution effectively prevents damage to the pneumatic sensor while maintaining its induction performance, saving costs and allowing for easy restoration of sensitivity by shaking off accumulated liquids from the membrane.
Implementation Method 1
the waterproof and breathable membrane comprises a substrate having a waterproof and breathable property
Implementation Method 2
the adhesive layer is provided on the surface of the substrate away from the anti-wrinkle ring so that the substrate is adhered to the main body
Data Source
AI summary
The present invention discloses a power assembly and an electronic cigarette having same. The power assembly comprises a main body, a waterproof and breathable membrane and a pneumatic sensor, wherein the main body is provided with an internal cavity in which the pneumatic sensor is mounted and a mounting portion in which an external load is mounted, the mounting portion is provided with an airflow passage, the internal cavity is in communication with external environment through the airflow passage, the waterproof and breathable membrane is mounted on the main body and covers the airflow passage; when the external load is mounted on the mounting portion, the air channel inside the external load is communicated with the airflow passage, and when the pneumatic sensor senses that the airflow movement in the airflow passage reaches a preset threshold, the main body is triggered to control the external load.