Aerosol-generating system with air quality sensor
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Solution Overview
Problem
Aerosol-generating systems face challenges in maintaining consistent aerosol quality and user experience across varying environmental conditions, particularly due to humidity and ambient air quality variations affecting the aerosol-forming substrate and user perception.
Innovation Solution
Incorporating an ambient air quality sensor in the aerosol-generating system to monitor properties such as carbon monoxide, volatile organic compounds, carbon dioxide, fine particulate matter, nitrogen dioxide, dioxygen, pressure, and nicotine, with a controller adjusting the heating assembly's power based on these readings to maintain consistent aerosol generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the ambient air quality sensor is placed close to the chamber to monitor environmental conditions, then the system can detect ambient air quality, but the sensor readings are interfered with by aerosol generated from the chamber
Solution Approach 1:
The ambient air quality sensor is extracted from the chamber environment and placed in the housing at a location substantially isolated from the chamber. This separation removes the sensor from the harmful aerosol environment while still allowing it to monitor ambient air quality through dedicated airflow pathways.
Solution Approach 2:
A dedicated airflow pathway is introduced as an intermediary mechanism between the external environment and the sensor. This pathway allows ambient air to reach the sensor without direct exposure to chamber aerosols, acting as a selective conduit that filters out harmful interference while maintaining sensing capability.
2Measurement precision
If the sensor is isolated from the chamber to avoid aerosol interference, then sensor readings are accurate, but the system complexity increases due to additional housing structures and airflow pathways
Solution Approach 1:
The housing structure serves multiple functions: it provides mechanical protection, creates the isolated sensor environment, and forms the airflow pathway structure. By making the housing multi-functional, the design avoids adding separate components for each function, thereby reducing overall system complexity despite the increased isolation requirements.
Solution Approach 2:
The airflow pathway is integrated into the existing housing structure rather than being a separate component. The housing walls themselves form the pathway boundaries, and openings in the housing create the airflow channels. This merging of functions reduces the number of discrete parts while maintaining the isolation benefit.
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 system ensures consistent aerosol quality and user experience by adapting to ambient conditions, reducing aerosol interference with sensor readings and enhancing environmental adaptability.
Implementation Method 1
an ambient air quality sensor arranged to sense a property of the ambient air in the vicinity of the system, the ambient air quality sensor being configured to sense one or more of: carbon monoxide; volatile organic compounds; carbon dioxide; fine particulate matter; nitrogen dioxide; dioxygen; pressure; and nicotine
Implementation Method 2
a heating assembly arranged to heat the aerosol-forming substrate when the aerosol-forming substrate is received in the chamber
Implementation Method 3
the controller being configured to control the supply of power to the heating assembly based on one or more readings from the ambient air quality sensor
Data Source
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AI summary
An aerosol-generating system, and aerosol-generating device and a charging case for an aerosol-generating device. The aerosol-generating system comprises: an aerosol-generating device (200); an ambient air quality sensor (116, 214); and a controller (110, 210). The aerosol-forming device (200) comprises: a housing (202) having a chamber (204) for receiving an aerosol-forming substrate; and a heating arrangement (206) for heating the aerosol-forming substrate when the aerosol-forming substrate is received in the chamber (204). The ambient air quality sensor (116, 214) is arranged to sense a property of the ambient air in the vicinity of the system and the controller (110, 210) is connected to the ambient air quality sensor (116, 214) and is configured to receive ambient air quality readings from the ambient air quality sensor (116, 214) and output an ambient air quality signal based on one or more of the readings of the ambient air quality sensor (116, 214).