Portable Mosquito-Repellent Volatilization Box for Skin-Safe Control

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Solution Overview

Problem

Existing mosquito repellents applied directly to the skin cause sticky discomfort, safety hazards, and quick volatilization leading to waste, as they rely on volatilization aids like alcohol or glycerol, which are not environmentally friendly.

Innovation Solution

A portable mosquito-control volatilization apparatus with a box body, adsorption structure, and protective-cover structure that allows for controlled volatilization of repellents like picaridine, BAAPE, or DEET without direct skin contact, using a slide-fit mechanism and breathable-film layer to manage gas release.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If repellent is painted directly on skin with volatilization aids, then diffusion effect is improved, but skin safety and comfort deteriorate

Engineering Contradiction:

Improvediffusion effectVSAvoidskin safety and comfort

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent introduces an adsorption structure as an intermediary carrier between the repellent and the user. The repellent is loaded onto the adsorption structure inside the box body, which then releases the repellent through controlled volatilization. This mediator approach allows the repellent to diffuse into the air without requiring direct application to the skin, thereby maintaining diffusion effectiveness while eliminating skin contact hazards and sticky discomfort

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces the mechanical application method (spraying or painting repellent on skin) with a volatilization-based release system. Instead of manually applying repellent that requires mechanical spreading, the system uses the adsorption structure to hold and gradually volatilize the repellent, substituting the mechanical application process with a passive volatilization mechanism that achieves diffusion without skin contact

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If repellent is painted on skin, then mosquito control is achieved, but repellent volatilizes quickly leading to waste

Engineering Contradiction:

Improvemosquito control effectivenessVSAvoidrepellent waste

Core Design Contradiction:

ReliabilityVSLoss of substance

Solution Approach 1:

The patent applies preliminary action by pre-loading the adsorption structure with the repellent inside the sealed box body before use. The repellent is prepared and positioned on the adsorption structure in advance, and the box is sealed to prevent premature volatilization. When needed, the box is opened and the repellent volatilizes at a controlled rate, ensuring the repellent is used efficiently without quick evaporation waste that occurs with direct skin application

Inventive Principle:

Principle #10Preliminary action

3Productivity

If volatilization aids like alcohol or glycerol are added, then diffusion is improved, but safety hazards and environmental issues arise

Engineering Contradiction:

Improvediffusion effectVSAvoidsafety hazards and environmental impact

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

The patent extracts and removes the harmful volatilization aids (alcohol, glycerol) from the system entirely. Instead of using these chemical additives to promote volatilization, the invention relies on the natural volatilization properties of the repellent itself when held on the adsorption structure. This extraction of harmful substances eliminates safety hazards for sensitive skin and reduces environmental impact while maintaining the diffusion effect through controlled release

Inventive Principle:

Principle #2Taking out (Extraction)

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 apparatus prevents skin contact with repellents, reduces waste, and maintains effective mosquito repellency by controlling volatilization, ensuring safety and convenience.

Implementation Method 1

an adsorption structure, arranged inside the box body, and configured to adsorb a repellent

Methodology Applied

Scientific EffectAdsorption: Adsorption

Implementation Method 2

configured to leak or cover a volatile gas generated by the repellent

Methodology Applied

Scientific EffectVolatilization: Evaporation

Data Source

PatentUS12396450B2Portable mosquito-control volatilization apparatus

Publication Date: 2025.08.26 LI WENJIE

AI summary

A portable mosquito-control volatilization apparatus, including a box body having an opening, an adsorption structure arranged inside the box body and configured to adsorb a repellent, and a protective-cover structure detachably assembled at the opening to cover the adsorption structure and configured to leak or cover a volatile gas generated by the repellent. After the box body is arranged with the adsorption structure that adsorbs the repellent, the volatilization of the repellent can be achieved. At the same time, the protective-cover structure can cover the adsorption structure to prevent the adsorption structure from detaching from the box body, without the need to paint the repellent on the skin, effectively avoiding a contact between the repellent and the user's skin, thereby avoiding the sticky discomfort, safety hazard, and quick volatilization leading to waste all caused by the direct contact between the repellent and the skin.