Microfluidic Scent Dispenser with Active Ejection
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Solution Overview
Problem
Conventional scent dispersal systems lack control over the consistency of scented fluid over time and result in significant fluid wastage due to evaporation, as they rely on evaporation for scent dispersion.
Innovation Solution
A microfluidic delivery system with a refillable cartridge that uses a fluid transport member to deliver fluid against gravity, incorporating a heating element, piezoelectric, or ultrasonic ejection mechanism to expel fluid through nozzles, allowing for controlled dispersion and refilling of the chamber, reducing evaporation and maintaining fluid consistency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If evaporation is used for scent dispersion, then the system is simple, but the fluid consistency changes over time and significant fluid is wasted
Solution Approach 1:
The patent replaces the passive evaporation mechanism with an active microfluidic ejection system using piezoelectric or ultrasonic elements to precisely control fluid delivery, eliminating the inconsistency and waste associated with uncontrolled evaporation
Solution Approach 2:
The system changes the fundamental parameter of fluid delivery from passive evaporation to active controlled ejection, allowing precise regulation of fluid release rate and amount to maintain consistent scent dispersion over time
2Use of energy by moving object
If evaporation is used for scent dispersion, then the system requires no power, but significant fluid wastage occurs
Solution Approach 1:
The microfluidic system incorporates feedback mechanisms through controlled ejection cycles that precisely deliver only the required amount of fluid, eliminating the continuous wastage associated with evaporation-based systems
Solution Approach 2:
The system recovers and reuses the same fluid volume over extended periods by precisely controlling ejection cycles, whereas evaporation systems continuously lose fluid to the atmosphere
3Ease of operation
If a hot plate is used to control evaporation rate, then some control is achieved, but the system still limits quality and continues to waste fluid
Solution Approach 1:
The patent replaces thermal control methods with direct mechanical/electrical control of fluid ejection through piezoelectric or ultrasonic elements, providing superior control over fluid delivery and eliminating the quality limitations of hot plate systems
Solution Approach 2:
The system transitions from indirect thermal control of evaporation to direct control of fluid ejection parameters, enabling precise regulation of fluid release characteristics for consistent scent dispersion quality
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 provides consistent scent dispersion with reduced fluid wastage by using capillary action and controlled ejection mechanisms, ensuring efficient and prolonged use of the scented fluid.
Implementation Method 1
A fluid path is located above the fluid transport member placing an end of the fluid transport member in fluid communication with a chamber and a nozzle. In response to the microfluidic delivery system receiving an electrical signal, an ejection element... is configured to cause fluid to be expelled through the nozzle.
Implementation Method 2
an ejection element, such as a heating element, piezoelectric element, or ultrasonic ejection element, is configured to cause fluid to be expelled through the nozzle
Implementation Method 3
an ejection element, such as a heating element, piezoelectric element, or ultrasonic ejection element, is configured to cause fluid to be expelled through the nozzle
Implementation Method 4
an ejection element, such as a heating element, piezoelectric element, or ultrasonic ejection element, is configured to cause fluid to be expelled through the nozzle
Data Source
AI summary
One or more embodiments are directed to a microfluidic delivery system that dispenses a fluid. The microfluidic delivery system may be provided in a variety of orientations. In one embodiment, the microfluidic delivery system is vertical so that fluid being expelled opposes gravity. In another embodiment, the microfluidic delivery system is orientated sideways so that fluid being expelled has a horizontal component. In yet another embodiment, the microfluidic delivery system faces downward.