Dual-Source Insect Repellent Briquettes for Cooking Fuel
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Solution Overview
Problem
Regions relying on solid fuel combustion for cooking are plagued by insect-borne illnesses like malaria, and existing insect repellent solutions are costly and resource-intensive.
Innovation Solution
Charcoal briquettes infused with two sources of insect repellent, including pyrethrin and its byproduct pymarc, which act as an accelerant, are used to repel insects during combustion, providing both thermal energy and insect repellency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional charcoal briquettes are used for cooking, then thermal energy is provided, but insects are attracted to the area
Solution Approach 1:
The patent combines cooking fuel and insect repellent into a single integrated briquette product. The charcoal briquette serves dual functions: providing thermal energy for cooking and emitting insect repellent compounds (pyrethrin from chrysanthemum flowers and pymarc byproduct) to repel mosquitoes. This merging eliminates the need for separate insect repellent tools and strategies.
Solution Approach 2:
The briquette is designed with multi-functionality, simultaneously serving as both a cooking fuel source and an insect repellent device. By incorporating insect repellent compounds into the charcoal matrix, the product performs multiple functions (heating and insect protection) that were previously required from separate products.
2Object-affected harmful factors
If insect repellent is added to charcoal briquettes, then insect repellency is improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies local quality by incorporating insect repellent compounds specifically into the briquette composition where they are needed for function. The pyrethrin and pymarc are integrated into the charcoal matrix at specific concentrations (pyrethrin at least 0.03 wt.%), creating localized insect repellent properties within the fuel source.
Solution Approach 2:
The briquette employs composite materials by combining charcoal powder (heating fuel), pyrethrin (insect repellent), and pymarc (accelerant and additional insect repellent source) into a single formulated product. This composite structure allows the different components to work together synergistically, providing both combustion properties and insect repellency.
3Duration of action of moving object
If pure charcoal is used for combustion, then burning duration is extended, but insect repellent emission is insufficient
Solution Approach 1:
The patent modifies the chemical composition parameters of the charcoal briquette by adding insect repellent compounds (pyrethrin and pymarc) to the traditional charcoal formula. This parameter change transforms the briquette from a simple fuel source into a functional insect repellent device while maintaining the extended burning characteristics of charcoal.
Solution Approach 2:
The briquette provides continuous dual functionality throughout the combustion process. As the charcoal burns slowly over an extended period, it continuously emits insect repellent compounds into the surrounding atmosphere, ensuring sustained protection against insects throughout the entire cooking duration.
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 offering a cost-effective and sustainable solution for malaria prevention.
Implementation Method 1
combustion of the fuel briquettes is configured to distribute the insect repellent into the surrounding atmosphere
Implementation Method 2
The first amount of pyrethrin and the second amount of pyrethrin are configured to vaporize with products of combustion of the heating fuel
Data Source
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.