Sintered Ceramic Porous Filter for Conical Cigarette Smoke
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Solution Overview
Problem
Smoke filtration devices for conically shaped cigarettes face a challenge in balancing filtration efficiency and gas conductivity, leading to reduced flavor and taste due to excessive filtration measures.
Innovation Solution
A smoke filtration device with a frusto-conical tubular body made of sintered ceramic material featuring an open-cell porous structure with 75-85% effective porosity, formed through additive manufacturing, which provides a defined smoke passage while excluding lateral passage, enhancing user experience and cleaning capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a very tortuous path or high adsorption capability material is used in the filtration passage, then the trapping efficiency of condensable smoke components is improved, but the conductivity for smoke/air mixture is reduced
Solution Approach 1:
The patent employs a porous ceramic material with controlled porosity (30-70%) to create a filtration structure that allows smoke/air mixture to pass through while trapping condensable components. The porous structure provides both filtration capability and maintained conductivity, resolving the contradiction between trapping efficiency and gas conductivity.
Solution Approach 2:
The patent optimizes the porosity parameter of the ceramic material within a specific range (30-70%) to balance filtration efficiency and conductivity. By controlling this physical parameter, the system achieves effective trapping of condensable smoke components while maintaining adequate smoke/air mixture conductivity for user comfort.
2Object-affected harmful factors
If excessively strong filtration is applied, then the trapping efficiency of smoke components is improved, but the loss of flavor and taste increases
Solution Approach 1:
The patent carefully controls the porosity parameter within the optimal range of 30-70% to achieve balanced filtration. This parameter optimization ensures that harmful condensable components are trapped while preserving the flavor and taste compounds in the smoke, preventing excessive loss of desirable substances.
Solution Approach 2:
The porous ceramic material provides different filtration characteristics at different scales - effectively trapping condensable smoke components while allowing lighter flavor and taste molecules to pass through, achieving selective filtration that preserves sensory qualities.
3Reliability
If a sintered ceramic material with open-cell porous structure is used, then the smoke passage is well-defined and lateral passage is excluded, but the manufacturing complexity increases
Solution Approach 1:
The patent uses sintered ceramic material with an open-cell porous structure that inherently provides well-defined smoke passage paths while blocking lateral passage. The sintering process creates a reliable, consistent structure that ensures proper filtration function.
Solution Approach 2:
By controlling the porosity parameter within the optimal range and using additive manufacturing followed by sintering, the patent achieves reliable smoke passage definition without excessive manufacturing complexity. The process parameters are optimized to balance manufacturing feasibility with functional reliability.
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
The device achieves a well-balanced filtration effect and pleasant user experience by optimizing smoke passage and air permeability, maintaining flavor and taste while ensuring effective smoke trapping.
Implementation Method 1
including a suitable particulate filtering material with a high adsorption capability, such as active charcoal
Implementation Method 2
the conductivity for the smoke/air mixture which is ultimately inhaled by the user
Implementation Method 3
a well-balanced filtration effect and, furthermore, are pleasant for the user
Data Source
Figure 1~3
AI summary
A smoke filtration device for making self- and machine-rolled conically shaped cigarettes (10) comprises a frusto-conical tubular body (2) with a proximal end (4), a distal end (6) and an internal smoke filtering passage (8) connecting said ends. To improve the device, said smoke filtering passage is integrally formed with said tubular body, said tubular body is made of a sintered ceramic material, and said smoke filtering passage is configured as an open-cell porous structure having an effective porosity of 75 to 85%. In a method of manufacturing the smoke filtration device, the frusto-conical tubular body including said open-cell porous structure is formed by additive manufacturing.