E-Cigarette Refill Bottle Valve for Leak-Free Liquid Transfer

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Solution Overview

Problem

The operation of adding tobacco liquid into existing electronic cigarettes is complicated and can dirty users' hands, and the process is slow, leading to potential leakage.

Innovation Solution

An electronic cigarette design featuring a detachable liquid bottle with an elastic one-way valve and a liquid guiding channel, allowing for easy and leak-proof refilling by utilizing the elastic properties of the valve to seal tobacco liquid within the storage cavities.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If the liquid inlet hole is opened for refilling, then the liquid storage cavity can be replenished, but the operation becomes complicated and slow

Engineering Contradiction:
Improvetobacco liquid in storage cavityVSAvoidrefilling operation
Core Design Contradiction:
Quantity of substanceVSEase of operation

Solution Approach 1:

The device is divided into a reusable atomizing main body and a replaceable liquid bottle. The liquid bottle contains a sealed liquid outlet that automatically connects to the atomizing main body's liquid inlet hole, eliminating the need for manual opening and refilling operations. Users simply replace the entire liquid bottle rather than manually refilling.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The liquid bottle is equipped with an elastic valve that automatically opens when the bottle is inserted into the atomizing main body and automatically closes when removed. This self-activating mechanism eliminates the need for manual operation to open/close the liquid inlet hole, making the refilling process as simple as replacing the bottle.

Inventive Principle:
Principle #25Self-service

2Quantity of substance

If the liquid inlet hole is opened for refilling, then the liquid storage cavity can be replenished, but tobacco liquid may leak and dirty the user's hands

Engineering Contradiction:
Improvetobacco liquid in storage cavityVSAvoidtobacco liquid leakage
Core Design Contradiction:
Quantity of substanceVSObject-affected harmful factors

Solution Approach 1:

The liquid outlet of the liquid bottle is pre-equipped with a sealed elastic valve that remains closed during normal handling and transport. The valve only opens when the bottle is properly inserted into the atomizing main body, preventing any possibility of leakage during storage, transport, or bottle replacement operations.

Inventive Principle:
Principle #9Preliminary anti-action

Solution Approach 2:

The liquid bottle is designed as a disposable component with an integrated sealed liquid outlet. Once the liquid is depleted or the seal is compromised, the entire bottle is discarded and replaced, eliminating the need for repeated opening/closing operations that could cause leakage and contamination.

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

3Quantity of substance

If waiting time is extended for liquid filling, then the liquid storage cavity can be properly filled, but service life is prolonged

Engineering Contradiction:
Improvetobacco liquid in storage cavityVSAvoidrefilling time
Core Design Contradiction:
Quantity of substanceVSLoss of time

Solution Approach 1:

The tobacco liquid is pre-filled and sealed within the liquid bottle during manufacturing. When the user needs to refill, they simply replace the pre-filled bottle with the atomizing main body, which automatically transfers the liquid. This eliminates the time-consuming process of manually pouring and waiting for liquid to fill the storage cavity.

Inventive Principle:
Principle #10Preliminary action

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

Simplifies the tobacco liquid refilling process, prevents leakage, and enhances user convenience by extending the electronic cigarette's service life and improving the user experience.

Implementation Method 1

an elastic valve is provided at a position of the first liquid outlet hole for sealing the first liquid outlet hole. The elastic valve is made of an elastic material

Methodology Applied
Scientific EffectElasticity: Elasticity

Implementation Method 2

a liquid guiding channel, the first liquid storage cavity is connected to the liquid inlet hole through the liquid guiding channel

Methodology Applied
Scientific EffectCapillary action: Capillary Action

Data Source

PatentEP4728903A1Electronic cigarette
Publication Date: 2026.04.22 PAX INT LTD
  • EP4728903A1 patent drawingFigure 1
  • EP4728903A1 patent drawingFigure 2
  • EP4728903A1 patent drawingFigure 3

AI summary

An electronic cigarette includes an atomizing main body and a liquid bottle. The atomizing main body is equipped with a first liquid storage cavity and an atomizing core for atomizing the tobacco liquid, and the atomizing core is arranged in the first liquid storage cavity. The atomizing main body is equipped with a first column, and a liquid inlet hole is arranged on the first column and is connected to the first liquid storage cavity. A second liquid storage cavity is arranged in the liquid bottle, the liquid bottle is provided with a first liquid outlet hole connected to the second liquid storage cavity, the liquid bottle is provided with an elastic valve, the elastic valve is provided with a seal, the seal on the elastic valve is configured to be pushed open by the first column when the liquid bottle is assembled onto the atomizing main body.