Graphite Heater Wire Routing to Prevent Aerosol Airflow Blockage
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Solution Overview
Problem
Existing heated cigarette devices face issues with aerosol adhesion to wires, leading to carbon deposits that block airflow and hinder normal operation due to the need for wires to be connected to power units, causing air inlet blockage.
Innovation Solution
The device incorporates a heating structure with a first and second graphite structure, where the wire is routed externally to avoid aerosol adhesion, using offset routing through holes and gaps to minimize carbon deposition, ensuring smooth airflow through airflow channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wire is routed through the heating device to connect the heating structure to the power unit, then electrical connection is achieved, but aerosol adheres to the wire forming carbon deposits that block airflow
Solution Approach 1:
The wire is extracted from the internal airflow path and routed externally through the housing of the heating device. The wire passes through a routing channel in the housing rather than through the airflow passage, separating the electrical connection function from the aerosol flow path. This eliminates the harmful interaction between aerosol and wire, preventing carbon deposit formation while maintaining electrical connectivity.
2Ease of manufacture
If the wire is positioned centrally to facilitate electrical connection, then wiring is simplified, but aerosol diffusion causes adhesion to the wire leading to blockage
Solution Approach 1:
The wire routing is designed with asymmetric positioning relative to the airflow passage. Instead of running centrally through the aerosol path, the wire is positioned in an offset routing channel in the housing. This asymmetric arrangement maintains manufacturing simplicity while effectively removing the wire from the aerosol adhesion zone, preventing carbon deposit formation.
3Power
If the heating structure is connected through wires inside the device, then power transmission is achieved, but air inlet space becomes blocked by accumulated carbon clumps
Solution Approach 1:
The wire routing is moved from the two-dimensional internal cross-section to the three-dimensional external housing structure. By routing the wire through the housing wall rather than through the internal airflow passage, the wire occupies a different spatial dimension that does not interfere with the air inlet space. This maintains power transmission while preserving unobstructed airflow.
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 reduces carbon deposition, maintains unblocked airflow, and prolongs the device's service life by preventing aerosol adhesion to wires, ensuring consistent performance.
Implementation Method 1
The heating structure is capable of heating airflow flowing through the airflow channel by heat transfer of the first graphite structure
Data Source
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AI summary
The present application discloses an aerosol generating apparatus for a heated tobacco product. The aerosol generating apparatus comprises a heating structure, a wire, a first graphite structure, and a second graphite structure. The first graphite structure and the second graphite structure are stacked such that airflow can enter an airflow channel of the first graphite structure via the second graphite structure. The first graphite structure is further provided with an accommodation cavity for accommodating the heating structure, and the second graphite structure is provided with a first end part adjacent to the first graphite structure. One end of the wire is connected to the heating structure, and the other end of the wire either passes through an edge of the first end part of the second graphite structure to an outer side, or passes through a wiring through-hole on the second graphite structure to the outer side, the wiring through-hole being offset from a central axis of the accommodation cavity. Thus, the wire is prevented from being routed under the accommodation cavity of the first graphite structure, reducing the adhesion of diffused aerosol to the wire, thereby mitigating carbon buildup below the accommodation cavity of the first graphite structure, ensuring that the whole air channel remains unobstructed, and allowing airflow to smoothly enter the airflow channel.