E-Cigarette One-Way Valve Structure for Reverse Airflow Blocking
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Solution Overview
Problem
Conventional electronic cigarettes suffer from e-liquid staining due to reverse airflow, which enters the atomizer when the user blows air, contaminating the device.
Innovation Solution
Incorporation of a one-way valve in the air passage made from environmentally friendly soft materials like silicone or latex, featuring a hollow cylinder with a radial inner protrusion and an inverted V-shape upper part with a slot that allows forward airflow while blocking reverse airflow by automatically closing the slot.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a one-way valve is added to the air passage, then reverse airflow is blocked and e-liquid staining is prevented, but device complexity increases
Solution Approach 1:
The patent employs a flexible membrane as the core component of the one-way valve. This thin film structure automatically opens to allow forward airflow and closes to block reverse airflow, providing an elegant solution that prevents e-liquid contamination while adding minimal structural complexity to the device.
Solution Approach 2:
The one-way valve is designed as a passive, self-regulating component that automatically responds to airflow direction without requiring external control mechanisms. The flexible membrane self-activates based on pressure differential, opening for inhalation and closing against exhalation, thereby preventing contamination through autonomous operation.
2Reliability
If a one-way valve structure is implemented, then e-liquid extrusion is prevented, but manufacturing complexity increases
Solution Approach 1:
The patent integrates the one-way valve components (flexible membrane, support structure, and sealing elements) into a unified assembly that can be manufactured as a single unit or pre-assembled module. This merging of components simplifies the manufacturing process while maintaining the reliability needed to prevent e-liquid extrusion during user operation.
3Object-affected harmful factors
If airflow resistance is increased to block reverse flow, then contamination is prevented, but forward airflow efficiency decreases
Solution Approach 1:
The one-way valve is strategically positioned at a specific location in the air passage where it can effectively block reverse airflow and prevent contamination. The valve's local placement ensures that forward airflow remains largely unrestricted, maintaining aerosol generation efficiency while providing targeted protection against saliva and air contamination at the critical interface.
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
Effectively prevents reverse airflow from entering the atomizer, thereby preventing e-liquid extrusion and maintaining the device's cleanliness.
Implementation Method 1
the one-way valve comprises a soft material; when in use, a forward airflow is passable through the one-way valve, and a reverse airflow is unpassable through the one-way valve
Data Source
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AI summary
An electronic cigarette, including an air passage and a one-way valve (2) disposed in the air passage. The one-way valve (2) includes a soft material. When in use, a forward airflow is passable through the one-way valve (2), and a reverse airflow is unpassable through the one-way valve (2), thus preventing the reverse airflow or saliva from entering the atomizer of the electronic cigarette.