Inhalation Heater Assembly with Direct Conductive Heating
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Solution Overview
Problem
Existing e-cigarette heaters are inefficient due to excess e-liquid heating, leading to energy wastage and potential nicotine overdose, and lack automation and safety features, with users able to refill with unregulated e-liquids posing health risks.
Innovation Solution
A heater assembly with a substrate and resistive element where the composition is directly conductively heated, reducing thermal mass and energy requirements, and incorporating a barrier layer to prevent by-product mixing, with automated manufacturing and safety features like a fuse to prevent overheating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a wick-and-coil heater is used with excess e-liquid, then the wick can be saturated and provide continuous supply, but the thermal mass increases and energy efficiency decreases
Solution Approach 1:
The patent extracts the excess e-liquid from the heating zone by using a wick that delivers only the required amount of e-liquid to the coil, preventing thermal mass buildup and improving energy efficiency while maintaining continuous supply
Solution Approach 2:
The patent applies local quality by creating different e-liquid distribution zones: the wick is saturated to ensure continuous supply, but the heating coil area receives only the precise amount needed, optimizing energy efficiency locally
2Reliability
If the coil is spaced apart from the wick to prevent burning, then the wick safety is improved, but heat transfer efficiency decreases and excessive power is required
Solution Approach 1:
The patent applies partial action by spacing the coil only as much as necessary to prevent wick burning while maintaining adequate heat transfer, avoiding both excessive spacing (which reduces efficiency) and insufficient spacing (which causes burning)
Solution Approach 2:
The patent uses the wick structure itself as an intermediary medium that facilitates heat transfer from the coil to the e-liquid while protecting the wick from direct contact with the hot coil, eliminating the need for additional spacing
3Productivity
If repeated heating to high temperature is used to vaporize e-liquid, then the vaporization function is achieved, but nicotine degradation and harmful by-products increase
Solution Approach 1:
The patent uses periodic heating cycles that vaporize only the required amount of e-liquid delivered by the wick, avoiding continuous high-temperature heating that causes nicotine degradation and harmful by-product formation
Solution Approach 2:
The patent changes the temperature parameter by maintaining lower operating temperatures through efficient heat transfer and precise e-liquid delivery, reducing thermal degradation of nicotine while achieving adequate vaporization
4Adaptability or versatility
If users can refill with unregulated e-liquids, then the device versatility is improved, but safety and dosing consistency deteriorate
Solution Approach 1:
The patent implements a controlled delivery system where the wick automatically regulates e-liquid flow to the heating coil, ensuring consistent dosing without requiring user intervention or regulation of refill liquids
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 enhances energy efficiency, reduces nicotine overdose risk, ensures consistent dosing, and improves safety by preventing undesirable by-product inhalation, while allowing for precise control and automation in the manufacturing process.
Implementation Method 1
a resistive element portion formed of a conductive substrate and carbonized to form a heater, connectable to an electric power source by means of at least two contacts supported by the substrate
Implementation Method 2
The heater is in direct contact with the composition so that heat is directly conducted into the composition to vaporise and aerosolise a material within the composition
Data Source
Figure 1~2A
Figure 3~4
Figure 5A~5D
AI summary
An assembly for an inhalation device comprising a mouthpiece (623) and a heater (10,100, 500,703), said heater comprising a substrate (12, 112, 212,512) which supports - at least one resistive element portion (14,114, 214, 514,705) applied over a first region of said substrate, - at least a pair of contacts (113,213, 513) each connected to the at least one resistive element portion at one end of said contacts and applied over a second region of said substrate, - an amount of an aerosolizable composition (18) deposited on the substrate, wherein the heater is disposed substantially within the mouthpiece with at least portions of the contacts being both exposed and accessible, and the substrate surface on which the aerosolizable composition has been deposited is disposed within or adjacent said fluid communication means such that the aerosol generated is entrained in the fluid flowing through said fluid communication means.