Aerosol Device Pressure Detection Passage Design

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Solution Overview

Problem

Existing aerosol generation devices face challenges in stably detecting inhale pressure, which is crucial for controlling the aerosol generation process and providing a consistent user experience with rich flavor and nicotine.

Innovation Solution

An aerosol generation device with a pressure detection sensor and a separate pressure detection passage, independent of the mainstream smoke passage, is designed to accurately measure inhale pressure by ensuring minimal interference from aerosol or liquid, using a protection film to prevent leakage and a flexible arrangement that allows precise detection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the pressure detection sensor is placed in the mainstream smoke passage, then the aerosol generation device can detect inhale pressure, but aerosol or liquid may interfere with the pressure measurement stability

Engineering Contradiction:

Improvepressure measurement stabilityVSAvoidaerosol or liquid interference

Core Design Contradiction:

Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The patent divides the smoke passage into two separate passages: a mainstream smoke passage for aerosol delivery and a pressure detection passage for measuring inhale pressure. This segmentation isolates the pressure sensor from aerosol and liquid interference while maintaining accurate pressure detection capability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces an intermediary structure (separate pressure detection passage) that mediates between the mainstream smoke passage and the pressure sensor. This intermediary channel allows pressure measurement without direct exposure to aerosol or liquid, ensuring measurement stability.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If the pressure detection passage is formed independently from the mainstream smoke passage, then aerosol or liquid interference is minimized, but the device structure becomes more complex

Engineering Contradiction:

Improvepressure detection stabilityVSAvoidpassage structure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent merges the pressure detection passage with the cigarette structure itself, utilizing the cigarette's internal geometry to form the pressure detection channel. This integration reduces the need for separate external components, thereby limiting the increase in device structural complexity while maintaining independent pressure detection capability.

Inventive Principle:

Principle #5Merging (Combining)

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 stably detects inhale pressure, ensuring consistent aerosol generation with appropriate flavor and nicotine delivery, enhancing user experience by preventing aerosol or liquid interference in pressure measurement.

Implementation Method 1

a heater disposed in the case and configured to heat the cigarette inserted into the case

Methodology Applied

Scientific EffectHeating: Heating

Implementation Method 2

a pressure detection sensor configured to detect a change in pressure of air inhaled to pass through the cigarette

Methodology Applied

Scientific EffectPressure detection: Pressure Gradient

Data Source

PatentUS11700885B2Aerosol generation device including mainstream smoke passage and pressure detection passage

Publication Date: 2023.07.18 KT&G CO LTD

AI summary

An aerosol generation device includes a case into which a cigarette is inserted, a heater disposed in the case and configured to heat the cigarette inserted into the case, a mainstream smoke passage connecting an end portion of the cigarette to the outside, and a pressure detection sensor configured to detect a change in a pressure of air inhaled to pass through the cigarette.