E-Cigarette Capsule Seal Design for Liquid Flow and TPM Control
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Solution Overview
Problem
Electronic cigarettes face challenges in delivering high Total Particulate Matter (TPM) vapor while minimizing undesirable chemical compounds generated during the vaporization process.
Innovation Solution
The design includes a vaporization unit with a heater and fluid transfer element, where a first seal compresses the fluid transfer element to control liquid flow, optimizing liquid distribution and minimizing leaks, along with a heating element power density of 0.7-1.0 Watt/mm² and a 20-40% effective surface area contact with the fluid transfer element, to achieve high TPM production with reduced by-products.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If liquid flow to the heating element is increased to generate more vapor, then TPM (Total Particulate Matter) increases, but undesirable chemical compounds also increase
Solution Approach 1:
The patent optimizes the power density parameter of the heating element to a specific range (0.7-1.0 Watt/mm²) and controls the liquid flow rate through the compressed seal arrangement. These parameter changes enable achieving high TPM (exceeding 5 mg per 55 ml puff) while keeping the temperature controlled to minimize unwanted by-products of vaporization.
2Productivity
If liquid distribution to the heating element is optimized to increase vapor production, then heating efficiency improves, but liquid leakage around the fluid transfer element occurs
Solution Approach 1:
The patent applies different compression forces to different regions of the fluid transfer element through the seal arrangement. The seal compresses the fluid transfer element radially to control liquid flow into the vaporization chamber, ensuring liquid only flows through the intended path to the heating element and preventing leakage around the element while maintaining optimal liquid distribution for high vapor production.
3Power
If heating power is increased to deliver more vapor, then vaporization rate increases, but temperature control becomes difficult and by-products increase
Solution Approach 1:
The patent specifies an optimal power density range of 0.7-1.0 Watt/mm² for the heating element, which provides sufficient heating power to generate high vapor production (TPM exceeding 5 mg per 55 ml puff) while maintaining temperature control within safe limits to minimize the generation of unwanted by-products of vaporization.
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 configuration enables efficient vapor production with TPM exceeding 5 mg per 55 ml puff while keeping unwanted compounds low, ensuring consistent performance and minimizing the generation of unwanted by-products.
Implementation Method 1
Vaporization is achieved by a vaporizer or heater unit which typically comprises a heating element in the form of a heating coil and a fluid transfer element. The vaporization occurs when as the heater heats up the liquid in the wick until the liquid is transformed into vapor.
Implementation Method 2
a first seal configured to sealingly connect the vaporization chamber and the tube or chimney to form the vapor flow channel, whereby the seal is additionally configured to compress the fluid transfer element in the radial direction of the fluid transfer element in order to control the flow of liquid into the vaporization chamber.
Data Source
AI summary
An electronic cigarette includes an inhaler body and a removable capsule. The inhaler body includes a power unit, a control circuitry and a capsule seating configured to connect with the capsule. The capsule includes a liquid store configured to contain a liquid to be vaporized, a vaporization chamber, a vapor outlet, a vaporizing unit including a heater and a fluid transfer element. The fluid transfer element has a liquid uptake portion located inside the liquid store and a liquid delivery portion in contact with the heater inside the vaporization chamber. A main vapor flow channel extends from the vaporization chamber to the vapor outlet. A first seal sealingly connects the vaporization chamber and the vapor flow channel, whereby the seal is configured to compress the fluid transfer element in the radial direction of the fluid transfer element in order to control the flow of liquid into the vaporization chamber.