Aerosol Heating Tube Structure for Axial Temperature Gradient
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Solution Overview
Problem
The temperature field distribution in central heating structures of heat-not-burn products is critical for consistent vaping experience and aerosol generation, but existing designs lack optimal temperature gradients and efficiency.
Innovation Solution
A heating structure with a tube body and heating element that creates a temperature gradient by spacing the heating element and tube wall, allowing infrared light transmission for uniform heating of the aerosol generating substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the heating element is disposed inside the quartz tube in contact with the tube wall, then the heating efficiency is improved, but the temperature field distribution becomes uneven causing inconsistent vaping experience
Solution Approach 1:
The patent applies local quality by creating different temperature zones along the axial direction of the quartz tube. The first portion (near closed end) is heated to higher temperature (350-550°C) while the second portion (near open end) is kept at lower temperature (≤250°C). This non-uniform temperature distribution is intentionally designed to match the different heating requirements of the substrate and circuit board, resolving the contradiction between heating efficiency and temperature uniformity.
2Object-affected harmful factors
If the heating element is disposed inside the quartz tube close to the open end, then the circuit board is heated less, but the substrate heating efficiency decreases
Solution Approach 1:
The patent positions the heating element to extend from the open end toward the closed end, creating a temperature gradient along the axial direction. The first portion near the closed end reaches higher temperature for efficient substrate heating, while the second portion near the open end remains cooler to protect the circuit board. This spatial arrangement of temperature zones simultaneously achieves both goals.
3Speed
If the heating element radiates infrared light directly at the substrate, then the heating speed is increased, but the risk of overheating and inconsistent vaping experience increases
Solution Approach 1:
The patent uses the quartz tube as an intermediary between the heating element and the substrate/circuit board. The tube transmits infrared light to the substrate while its thermal mass and geometry create a temperature gradient that prevents direct excessive heating. The spaced-apart configuration allows the tube to mediate heat distribution, maintaining both heating speed and consistency.
4Temperature
If the heating element is spaced apart from the tube wall, then the temperature field distribution is improved, but the heating efficiency decreases
Solution Approach 1:
The patent resolves this contradiction by creating local quality differences along the axial direction. The heating element is spaced apart from the tube wall to enable temperature gradient formation, with the first portion (near closed end) receiving sufficient heat for efficient substrate heating while the second portion (near open end) remains cooler. This localized temperature control maintains both efficiency and distribution quality.
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 design prevents overheating of the substrate, enhances vaping experience consistency, and increases aerosol generation, while reducing the risk of overheating components like the circuit board.
Implementation Method 1
the heating element is configured to generate heat and radiate infrared light when energized, and the infrared light is transmitted through the tube body and heats an aerosol generating substrate
Data Source
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AI summary
The present invention relates to an aerosol generating device and a heating structure thereof. The heating structure includes a heating element and a tube body. The heating element and the tube wall of the tube body are at least partially spaced apart, the heating element is configured to generate heat and radiate infrared light when energized, and the infrared light is transmitted through the tube body and heats an aerosol generating substrate. The tube body includes a first portion and a second portion that are distributed along the axial direction of the tube body, and the first portion and the second portion are configured to heat the first portion to a higher temperature than that of the second portion when the heating element is energized.