Insect Repellent Briquette Composition Combining Pyrethrin and Pyrethrum Marc

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Solution Overview

Problem

Regions relying on solid fuel combustion for cooking are plagued by insect-borne illnesses like malaria, and conventional insect repellents are costly and resource-intensive.

Innovation Solution

Charcoal briquettes infused with pyrethrin and pyrethrum marc, which act as both an insect repellent and accelerant, providing dual functionality for cooking and insect repulsion.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional insect repellents are used, then insect protection is provided, but cost and resource consumption increase

Engineering Contradiction:
Improveinsect protectionVSAvoidresource consumption
Core Design Contradiction:
ReliabilityVSQuantity of substance

Solution Approach 1:

The patent combines cooking fuel and insect repellent into a single integrated product. The briquette contains pyrethrin (insect repellent) embedded within the charcoal fuel matrix, allowing simultaneous heat generation and insect protection during combustion. This eliminates the need for separate insect repellent applications and reduces overall resource consumption.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The briquette serves multiple functions: it acts as both a cooking fuel source and an insect repellent. By incorporating pyrethrin into the fuel composition, the product provides dual functionality, reducing the need for additional tools and strategies for insect repulsion while maintaining cost-effectiveness.

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

2Reliability

If additional insect repelling tools are used, then insect protection is enhanced, but device complexity and cost increase

Engineering Contradiction:
Improveinsect protectionVSAvoidnumber of tools
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent merges the functions of cooking fuel and insect repellent into a single briquette product. This integration eliminates the need for multiple separate tools (cooking stove plus insect repellent devices), simplifying the system while maintaining effective insect protection during cooking activities.

Inventive Principle:
Principle #5Merging (Combining)

3Reliability

If pyrethrin additive is used, then insect repellent effectiveness is improved, but manufacturing cost increases

Engineering Contradiction:
Improveinsect repellent effectivenessVSAvoidmanufacturing cost
Core Design Contradiction:
ReliabilityVSEase of manufacture

Solution Approach 1:

The patent optimizes the concentration of pyrethrin additive within the briquette to achieve effective insect repellency at a cost-effective level. By carefully controlling the amount and distribution of pyrethrin in the fuel mixture, the invention maintains high repellent effectiveness while managing manufacturing costs through efficient use of the active ingredient.

Inventive Principle:
Principle #35Parameter changes

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 briquettes effectively repel insects, reducing the need for additional insect-repelling tools and strategies, while being cost-effective and environmentally friendly.

Implementation Method 1

combustion of the fuel briquettes is configured to distribute the insect repellent into the surrounding atmosphere

Methodology Applied
Scientific EffectEvaporation: Evaporation

Implementation Method 2

The agricultural waste may further operate or function as an accelerant that improves combustibility of the resulting insect repellent briquettes

Methodology Applied
Scientific EffectCombustion: Combustion

Data Source

PatentUS20250320421A1Systems, methods, and compositions of insect repellent briquettes
Publication Date: 2025.10.16 MAGAYI CHARLOT
  • US20250320421A1 patent drawing
  • US20250320421A1 patent drawing
  • US20250320421A1 patent drawing

AI summary

Systems, methods, and compositions to provide insect repellent briquettes for cooking stoves are provided. For example, a fuel briquette composition may include a heating fuel, a first source of an insect repellent, and a second source of the insect repellent, where the second source is different from the first source. As another example, a fuel briquette may include a heating fuel, an accelerant comprising pymarc, a first amount of pyrethrin distributed interstitially between the heating fuel and the accelerant, and a second amount of pyrethrin contained within the pymarc. As a further example, a method of making a fuel briquette may include processing a chrysanthemum material to produce a liquid additive and a solid pymarc, forming a briquette mixture that includes a heating fuel, the solid pymarc, and the liquid additive, and compressing and drying the briquette mixture to form a fuel briquette.