Ceramic pellet grill
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Solution Overview
Problem
Existing pellet-fired grills for barbecue lack efficient pellet feeding and combustion air supply systems, leading to poor burning efficiency and exposure to corrosion, while charcoal grills emit harmful substances and electromagnetic grills lack smoky flavor and temperature control.
Innovation Solution
A ceramic pellet grill with a ceramic oven body, conduit, firepot, auger, hopper, and fan, featuring a ceramic inner liner and thermostatic control to regulate temperature and improve combustion efficiency, while protecting against corrosion and food residue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If charcoal combustion is used for grilling, then pure taste is achieved, but harmful emissions (carbon monoxide, volatile organic compounds) are produced
Solution Approach 1:
The patent changes the fuel parameter from charcoal to wood pellets, and controls combustion parameters through automated feed rate control and air supply regulation. This maintains the smoky flavor benefit of wood combustion while achieving more complete burning that reduces harmful emissions like carbon monoxide and volatile organic compounds.
Solution Approach 2:
The patent replaces the manual lighting and monitoring process with an automated electronic control system that includes electronic ignition, automated pellet feeding via auger, and computer-controlled air supply. This substitution enables precise control of combustion parameters to minimize harmful emissions while maintaining cooking quality.
2Speed
If lighter fluid is used to start charcoal combustion, then ignition is achieved, but volatile organic compounds are released and petroleum residue is left on food
Solution Approach 1:
The patent replaces chemical ignition aids (lighter fluid) with an electronic ignition system that uses an electric heating element or spark to ignite the pellets. This substitution eliminates the need for volatile organic compounds and petroleum-based ignition aids, providing clean ignition without contaminating the food or air.
Solution Approach 2:
The patent introduces an intermediate ignition mechanism (electric heating element or spark generator) between the power source and the fuel ignition. This intermediary provides controlled, clean ignition without requiring chemical accelerants, thus avoiding the release of harmful volatile organic compounds and petroleum residues.
3Temperature
If charcoal is used for grilling, then high temperature is achieved, but combustion efficiency is insufficient
Solution Approach 1:
The patent incorporates temperature sensors and electronic control systems that continuously monitor the combustion process and adjust pellet feed rate and air supply in real-time. This feedback control ensures complete combustion at the required grilling temperatures, maximizing combustion efficiency while maintaining the high temperatures needed for proper grilling.
Solution Approach 2:
The patent uses dynamically adjustable pellet feed rates and air supply levels that adapt to changing combustion conditions and temperature requirements. This dynamic control allows the system to optimize combustion efficiency at each temperature level, ensuring complete burning even at high grilling temperatures where static systems would fail.
4Ease of operation
If electromagnetic power is used for grilling, then temperature control is simplified, but smoky flavor is lost and taste quality deteriorates
Solution Approach 1:
The patent combines the benefits of both charcoal and electronic control systems into a single hybrid device. The wood pellet combustion provides the smoky flavor and chemical reactions characteristic of traditional grilling, while the electronic auger feed system and air supply control provide the precise temperature regulation of electromagnetic devices, achieving multi-functionality.
5Temperature
If pellet feeding structures and combustion air supply devices are exposed to high temperatures, then grilling function is achieved, but corrosion and degradation occur
Solution Approach 1:
The patent divides the grill into distinct temperature zones: a high-temperature combustion zone for burning pellets, and a lower-temperature cooking zone for food preparation. The pellet feeding structures and air supply devices are positioned in or near the combustion zone but are designed with heat-resistant materials and cooling features, while cooking components are in the cooler zone, reducing their exposure to corrosive high temperatures.
Solution Approach 2:
The patent introduces a ceramic or heat-resistant metal firepot as an intermediary between the combustion process and the pellet feeding/air supply mechanisms. This intermediary contains the high-temperature combustion and protects the mechanical feeding and air supply components from direct exposure to corrosive heat and flames, extending their service life.
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 ceramic pellet grill achieves high burning efficiency, prevents corrosion, and provides a smoky flavor with precise temperature control, enhancing the barbecue experience while ensuring safety and cleanliness.
Implementation Method 1
An electric motor at the first end, coupled to the auger, to rotate the auger, where rotation of the auger by the electric motor conveys pellets from the hopper into the firepot via the auger
Implementation Method 2
a fan configured to force combustion air from outside of the ceramic oven body into the firepot via the conduit
Implementation Method 3
combustion of the pellets in the firepot
Data Source
AI summary
A pellet grill includes a ceramic oven body and a ceramic inner liner. The oven body includes a first through-hole in its side. A conduit is inserted through the first through-hole into the oven body. A firepot is removably coupled to the conduit toward an end of the conduit that is within the oven body. The inner liner conforms to a shape of, and fits to a portion of, an oven body inner wall. The inner liner covers the conduit and includes a second through-hole aligned with the firepot. A bulge in the inner liner conforms to a shape of the conduit within the ceramic oven body and may protect the conduit from cooking debris and from heat, rising from a flame in the firepot, that circulates within a portion of the oven body that is above the inner liner. The firepot receives fuel and air via the conduit.