Coffee Roasting Appliance with Multi-Source Heat Control
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Solution Overview
Problem
Conventional cooking appliances face challenges in achieving even and thorough roasting operations, requiring careful user oversight and intervention, which can be time-consuming and prone to inconsistencies.
Innovation Solution
A cooking appliance equipped with multiple heat sources (direct-heat sources at the top and bottom, and a convection heat source) controlled by a controller that can receive input commands for coffee roasting operations, allowing for the selection of predetermined roasting profiles to automatically determine and adjust power levels for each heat source, enabling automated coffee roasting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional cooking methods are used for roasting coffee beans, then the appliance structure remains simple, but the roasting uniformity and thoroughness deteriorate
Solution Approach 1:
The heating system is segmented into multiple independent heat sources: a first direct-heat source at the top, a second direct-heat source at the bottom, and a convection heat source. Each heat source can be independently controlled to provide heat from different directions, ensuring uniform roasting of coffee beans throughout the cooking chamber.
Solution Approach 2:
Different regions of the cooking chamber are provided with different types of heat sources tailored to specific roasting needs. The top and bottom direct-heat sources provide intense localized heating for rapid roasting, while the convection heat source provides gentle circulating heat for even heat distribution. The controller can selectively activate specific heat sources based on the roasting stage and desired outcome.
2Reliability
If manual oversight is used during roasting, then the roasting process can be monitored, but the time consumption and operational complexity increase
Solution Approach 1:
The controller is pre-programmed with multiple roasting profiles that automatically control the heating elements throughout the roasting process. The system monitors and adjusts the power levels of each heat source independently, managing the entire roasting sequence without requiring user intervention. This self-service capability ensures consistent roasting quality while freeing the user from time-consuming manual oversight.
Solution Approach 2:
The controller continuously monitors the roasting process and automatically adjusts the power levels of the heating elements based on pre-programmed parameters. The system incorporates feedback mechanisms to maintain optimal temperature and heat distribution, ensuring reliable roasting quality control without requiring constant manual monitoring.
3Manufacturing precision
If multiple heat sources are used for roasting, then the roasting precision and control improve, but the device complexity increases
Solution Approach 1:
The controller serves multiple functions: it independently controls the first direct-heat source, the second direct-heat source, and the convection heat source. The same controller unit manages temperature regulation, timing, and the selection of different roasting profiles, consolidating multiple control functions into a single universal device that simplifies the overall system architecture.
Solution Approach 2:
The controller enables precise adjustment of power levels for each heat source independently. By varying the power parameters of each heating element according to pre-programmed roasting profiles, the system achieves high roasting precision. The controller can dynamically change temperature, heating rate, and heat distribution parameters to optimize the roasting process for different coffee bean types and desired roast levels.
4Ease of operation
If automated roasting profiles are implemented, then the ease of operation improves, but the initial device complexity increases
Solution Approach 1:
Multiple roasting profiles are pre-programmed into the controller during manufacturing, containing optimized heating sequences, temperature curves, and timing parameters for different coffee bean types and roast levels. Users simply select from these pre-configured options without needing to program or understand the complex heating parameters, making the operation simple while the controller handles the complexity of coordinating multiple heat sources.
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 solution allows for precise and customizable coffee roasting operations without direct user intervention, ensuring consistent results and simplifying the roasting process by automating the control of heat sources based on predefined profiles.
Implementation Method 1
a first direct-heat source provided at a top of the cooking chamber; a second direct-heat source provided at a bottom of the cooking chamber
Implementation Method 2
a first direct-heat source provided at a top of the cooking chamber; a second direct-heat source provided at a bottom of the cooking chamber
Implementation Method 3
a convection heat source provided in the cooking chamber
Data Source
AI summary
A cooking appliance includes a cabinet defining a cooking chamber; a first direct-heat source; a second direct-heat source; a convection heat source; and a controller operably coupled to the first heat source, the second heat source, and the convection heat source, the controller configured to perform a coffee roasting operation. The coffee roasting operation includes receiving an input command for the coffee roasting operation; obtaining a predetermined roasting profile among a plurality of roasting profiles in response to receiving the input command; determining a power level of at least one of the first direct-heat source, the second direct-heat source, or the convection heat source according to the obtained roasting profile; and initiating the coffee roasting operation after determining the power level of at least one of the first direct-heat source, the second direct-heat source, or the convection heat source.