Fuel efficient grill for direct and indirect cooking
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Solution Overview
Problem
Kamado type grills face issues with inefficiency in fuel usage, uneven cooking, and poor air flow due to fixed fuel grate positions, inadequate heat control, and the use of heavy, fragile ceramic materials that impede heat transfer and convection, leading to suboptimal cooking results.
Innovation Solution
A grill design featuring a lid with a hollow plenum, adjustable vent assembly, and a hinged deflector or diffuser plate that allows for flexible fuel grate positioning, improved air intake, and enhanced heat control, enabling both direct and indirect cooking configurations with reduced fuel consumption and improved cooking quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If ceramic materials are used for the grill body and deflector plate, then heat retention is improved, but weight increases and fragility increases
Solution Approach 1:
The patent applies composite materials by combining stainless steel for the grill body with ceramic coating for heat retention. The deflector plate uses a stainless steel core with ceramic coating, providing both structural strength and thermal properties without the full weight and fragility of solid ceramic construction.
2Temperature
If ceramic materials are used for the grill body and deflector plate, then heat retention is improved, but reliability decreases due to fragility
Solution Approach 1:
The patent applies composite materials by combining stainless steel for the grill body with ceramic coating for heat retention. The deflector plate uses a stainless steel core with ceramic coating, providing both structural strength and thermal properties without the full weight and fragility of solid ceramic construction.
3Ease of manufacture
If the fuel grate is fixed at a single position, then manufacturing simplicity is improved, but adaptability for different cooking modes decreases
Solution Approach 1:
The patent applies dynamics by making the fuel grate adjustable to multiple positions rather than fixed. The grate can be moved vertically to change its distance from the cooking surface, enabling different cooking modes such as direct high-heat grilling or indirect low-heat smoking, thus providing versatility while maintaining relatively simple construction.
4Temperature
If a solid deflector plate is used, then heat barrier function is improved, but fuel efficiency decreases due to poor air flow
Solution Approach 1:
The patent applies porous materials by incorporating air flow passages and openings in the deflector plate structure. These passages allow combustion air to reach the fuel and hot air to circulate efficiently, maintaining effective heat control and barrier function while improving air flow to reduce fuel consumption.
5Adaptability or versatility
If ceramic deflector plate with upstanding legs is used, then indirect cooking capability is improved, but device complexity increases
Solution Approach 1:
The patent applies universality by designing the deflector plate to serve multiple functions: it acts as a heat barrier, provides structural support for the cooking grate, and incorporates air flow passages. The integrated design eliminates the need for separate legs and multiple components, reducing overall device complexity while maintaining indirect cooking capability.
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 design achieves efficient fuel usage, improved air flow, and better temperature control, allowing for flexible cooking modes while reducing the weight and fragility issues associated with traditional ceramic grills, resulting in more consistent and fuel-efficient cooking.
Implementation Method 1
The intermediate portion is adapted to support a deflector plate having a substantially hollow plenum. The hollow plenum aids in indirect cooking and helps regulate temperature.
Implementation Method 2
a plurality of air intake slots on the bottom of the body, the air intake slots having a key shape
Implementation Method 3
The ceramic components are thought to aid in the slow cooking and/or smoking process by retaining heat.
Implementation Method 4
an interior grill body member within the exterior grill body, the interior body member having an open top portion, an intermediate portion adapted to support an annular retaining member and an open bottom portion adapted to support a fuel grate, the open bottom portion being in fluid communication with the plurality of air intake slots and wherein a hollow space is created between the sides of the interior grill body member and the exterior grill body member
Data Source
AI summary
A fuel efficient grill that permits effective direct and indirect cooking, permits movement of the fuel grate and has uniquely shaped air intake slots is provided. Also provided is a hinged deflector or diffuser plate and an adjustable top vent assembly.