E-cigarette Puff Sensor Mode Control via Airflow

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Solution Overview

Problem

Conventional electronic smoking devices require additional user interface elements for controlling aerosol intensity, which complicates operation and can lead to malfunctions, unlike conventional cigarettes where inhalation patterns naturally control smoke intake.

Innovation Solution

An electronic smoking device with control electronics that operate the atomizer in predetermined modes based on airflow variations detected by a puff sensor, allowing users to switch modes through specific inhalation patterns without extra interface elements, providing feedback for mode changes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If additional user interface elements (sliders, switches, buttons, knobs) are provided on the electronic smoking device to control aerosol intensity, then the functionality and control options are improved, but the device complexity and ease of operation deteriorate

Engineering Contradiction:
Improvecontrol options for aerosol intensityVSAvoiddevice complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The puff detector is designed to perform multiple functions: it detects both normal puffs for aerosol generation and specific puff patterns for mode selection. By making the existing detector multi-functional, the patent avoids adding separate control interfaces while expanding control capabilities. The control electronics analyze puff characteristics (duration, frequency, pattern) to distinguish between different user intentions, allowing one component to serve multiple purposes.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If additional user interface elements are provided to adjust aerosol strength, then the adaptability is improved, but the ease of operation worsens due to complicated operation and potential malfunctions

Engineering Contradiction:
Improveaerosol intensity controlVSAvoidease of operation
Core Design Contradiction:
Adaptability or versatilityVSEase of operation

Solution Approach 1:

The system uses the user's own puffing behavior as the control input. Instead of requiring the user to learn and operate separate controls, the device interprets natural puffing patterns (such as prolonged puffs or specific sequences) to adjust modes. This makes the interface intuitive and self-explanatory, as users interact with the device in the same way they always have, eliminating the learning curve associated with additional controls.

Inventive Principle:
Principle #25Self-service

3Adaptability or versatility

If additional user interface elements are added for mode control, then the functionality is improved, but the reliability worsens due to potential faulty operation and incompatible user inputs

Engineering Contradiction:
Improvemode control optionsVSAvoidreliability
Core Design Contradiction:
Adaptability or versatilityVSReliability

Solution Approach 1:

The control electronics continuously monitor puff detector signals and analyze their characteristics to determine user intent. The system provides feedback by activating the atomizer in different modes based on detected puff patterns, and can acknowledge mode changes through visual or tactile feedback. This closed-loop approach ensures that mode changes only occur when the system confidently identifies a deliberate user intention, reducing erroneous activations.

Inventive Principle:
Principle #23Feedback

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

Facilitates intuitive operation by eliminating the need for additional controls, ensuring coordinated mode transitions and preventing overactivation, mimicking the natural control of conventional cigarette smoking.

Implementation Method 1

a puff detector which detects a user puffing on the device (e.g., by sensing an under-pressure or an air flow pattern through the device)

Methodology Applied
Scientific EffectAirflow detection:

Implementation Method 2

an electrically heatable atomizer including an electric heater adapted to atomize a liquid

Methodology Applied
Scientific EffectJoule heating: Joule Heating

Implementation Method 3

an electric heater adapted to atomize a liquid supplied from a reservoir in order to provide an aerosol

Methodology Applied
Scientific EffectAtomization:

Implementation Method 4

the heater in the atomizer is powered, which causes the creation of aerosol

Methodology Applied
Scientific EffectVaporization:

Data Source

PatentUS10645971B2Electronic smoking device
Publication Date: 2020.05.12 FONTEM VENTURES
  • US10645971B2 patent drawing

AI summary

An electronic smoking (1) device comprises a housing (2), control electronics (14) and a puff detector (18). The housing (2) accommodates a battery (10) as an electric power source powering an electrically heatable atomizer (20) comprising an electric heater (22) and adapted to atomize a liquid supplied from a reservoir (6) to provide an aerosol exiting from the atomizer (20). The control electronics (14) controls the heater (22) of the atomizer (20) and is adapted to operate the heater (22) in at least two predetermined modes. The puff detector (18) indicates an aerosol inhaling puff to the control electronics (14). The control electronics (14) selects a specific mode for operating the heater (22) via a control signal initiated by the puff detector (18).