Device for roasting partially roasted coffee beans
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Solution Overview
Problem
Current home roasters provide limited options for achieving a desired coffee taste, as they often use high temperatures for fast roasting, resulting in uneven roasting and loss of flavor, and consumers lack control over roasting parameters.
Innovation Solution
A method and device for roasting partially roasted coffee beans to a predetermined final roast level, using heat in the range of 190°C to 230°C and sensing moisture content, density, or color to determine and adjust the roasting profile, ensuring homogeneous roasting and energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If extremely high temperature (higher than 300°C) is used for fast roasting, then roasting time is reduced, but roasting quality becomes unbalanced with over-roasted surface and under-roasted core
Solution Approach 1:
Coffee beans are pre-roasted to a partial roast level before the final roasting process. This preliminary action reduces the remaining roasting time needed while avoiding the need for extremely high temperatures that would cause unbalanced roasting. The pre-roasted beans require less energy and time to reach the desired final roast level, eliminating the contradiction between fast roasting and quality.
2Ease of operation
If pre-set roasting profiles are used in home roasters, then end-user convenience is improved, but user control over roasting parameters is lost
Solution Approach 1:
The roasting system provides dynamic control by allowing users to adjust roasting parameters such as target roast level, roasting time, and temperature curves. Instead of fixed pre-set profiles, the system adapts to user preferences and can be controlled via a user interface that accepts various input methods including color charts, smartphone applications, and direct parameter entry. This dynamic approach maintains ease of operation while significantly improving adaptability.
3Manufacturing precision
If green coffee beans are roasted from scratch, then final roast level is achieved, but much time is required for the roasting process
Solution Approach 1:
The system uses pre-roasted coffee beans that have already undergone an initial roasting process to reach a partial roast level. This preliminary action eliminates the need for lengthy roasting from green beans, reducing the final roasting time significantly while still achieving the desired final roast level through the completion process.
4Productivity
If intensive heating is applied to achieve fast roasting, then roasting time is shortened, but homogeneous roasting is compromised
Solution Approach 1:
The system optimizes roasting parameters by using moderate temperatures (below 300°C) combined with extended roasting time. The roasting profile includes controlled temperature curves that ensure uniform heat distribution throughout the beans. By changing the parameters from high-temperature fast roasting to moderate-temperature extended roasting, the system achieves both productivity and uniformity.
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
This approach allows for a short, energy-efficient roasting process that produces beans with a balanced flavor and aroma, enabling consumers to achieve a desirable taste without over-roasting, and can be integrated into home-use coffee machines for instant brewing.
Implementation Method 1
a roasting unit for roasting the partially roasted coffee beans according to the determined roasting profile
Data Source
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AI summary
The present invention relates to a roasting method of roasting partially roasted coffee beans; the roasting method comprises the steps of: obtaining a roast level of the partially roasted coffee beans; determining a roasting profile for roasting based on at least the roast level of the partially roasted coffee beans prior to roasting; and roasting the partially roasted coffee beans according to the determined roasting profile. The present invention also proposes a method of making coffee, a roasting device and a coffee machine providing a segmented roasting solution.