Portable Mist Emitting Device With Wick-Fed Ultrasonic Atomization
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Solution Overview
Problem
Conventional insect repellent devices are cumbersome, require continuous electrical power, inefficient, and pose health risks due to liquid vaporization, while aerosols/liquids are unsafe and expensive.
Innovation Solution
A portable, compact mist emitting device using a wick and ultrasonic atomization to disperse volatile liquid as fine mist particles, eliminating the need for continuous power and reducing liquid consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional spraying devices are used to disperse volatile fluid in liquid form, then insects and pests are eliminated or repelled, but respiratory disorders such as nausea, cough, and sore throat occur in human beings located in proximity
Solution Approach 1:
The patent applies phase transition by converting the volatile fluid from liquid form to vapor form through heating. The heating element heats the volatile fluid in the reservoir, causing it to evaporate and disperse as vapor rather than liquid droplets. This phase transition eliminates the respiratory irritation caused by liquid spray while maintaining the insect repellent effect, as the vapor form does not cause nausea, cough, or sore throat in human beings.
2Object-affected harmful factors
If positive thermistor heaters are used to evaporate liquid through a wick, then the evaporated liquid is dispersed into surroundings, but heavy electrical energy is required and dispersal takes longer time
Solution Approach 1:
The patent applies parameter changes by modifying the heating mechanism from a positive thermistor heater to a heating element with different operational characteristics. The heating element in the reservoir is designed to operate at lower electrical energy consumption while achieving the same evaporation and dispersal effect. This parameter change in the heating system reduces energy requirements and accelerates the dispersal time of the evaporated liquid into the surroundings.
3Reliability
If conventional spraying devices require continuous electrical power supply for operation, then insect control function is maintained, but portability is severely affected during irregular power supply
Solution Approach 1:
The patent applies self-service by designing the device to automatically refill the reservoir from the container through a conduit system. The pump draws volatile fluid from the container and automatically replenishes the reservoir without requiring user intervention or continuous power supply for refilling. This self-service refilling mechanism maintains the insect control function during irregular power supply while preserving portability, as the device can operate autonomously without frequent manual refilling.
4Object-affected harmful factors
If aerosols/liquids are used to eliminate or repel insects or pests, then the function is achieved, but they are generally unsafe to inhale by human beings as they contain pressurized liquid
Solution Approach 1:
The patent applies phase transition by converting the volatile fluid from liquid form to vapor form through heating before dispersal. The heating element heats the fluid in the reservoir, causing it to evaporate and release as vapor rather than pressurized liquid aerosols. This phase transition eliminates the inhalation safety hazard associated with pressurized liquid aerosols while maintaining effective insect and pest repellent function, as the vapor form is safe for human beings to inhale.
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 provides safe, efficient, and fast mist emission with reduced liquid use, effectively repelling insects and pests without continuous power supply, ensuring safety and cost-effectiveness.
Implementation Method 1
The liquid conveying member is configured to convey the liquid stored in the fluid reservoir towards the second end by capillary action
Implementation Method 2
The atomizer may include an ultrasonic atomization transducer configured to oscillate at a pre-determined frequency
Data Source
AI summary
A portable and compact mist emitting device for disperse a fluid mist into a target surrounding space. The mist emitting device includes a bottom housing having a recessed portion adapted to receive a replaceable fluid reservoir storing a liquid, a liquid conveying member having a first end positioned in the fluid reservoir and a second end extending from the recessed portion in a direction away from the fluid reservoir. The liquid conveying member conveys the liquid stored in the fluid reservoir towards the second end by capillary action. An atomizer is coupled with the liquid conveying member to convert the liquid present at the second end of the liquid conveying member into mist particles.