System and method for automated water heating & dispense cycles for brewing pour-over coffee
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Solution Overview
Problem
Existing water boilers for brewing coffee lack automation in heating and dispensing cycles, leading to inconsistent water temperature and distribution, which affects the quality of brewed coffee.
Innovation Solution
An automated boiler system with a heating element, temperature sensor, and positioner assembly that controls the temperature and pattern of water dispensation into a pour-over coffee maker, ensuring precise and uniform distribution of heated water.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If automated heating and dispense cycles are implemented, then water temperature consistency and distribution uniformity are improved, but device complexity increases
Solution Approach 1:
The system incorporates temperature sensors that continuously monitor water temperature during heating and dispense cycles, feeding this data back to the controller which adjusts heating element power accordingly. This closed-loop feedback mechanism ensures consistent water temperature (±1°F) while automating the process, resolving the contradiction between precision and complexity by using intelligent control rather than oversimplified mechanical systems
Solution Approach 2:
The automated boiler system performs self-regulation of heating cycles and dispense timing without human intervention. The controller automatically manages the heating element, pumps, and valves based on pre-programmed parameters, allowing the system to maintain temperature consistency and distribution uniformity autonomously, thereby improving precision without requiring proportionally higher complexity
2Manufacturing precision
If automated positioner assembly is added to control dispense pattern, then distribution uniformity is improved, but device complexity increases
Solution Approach 1:
The system replaces complex mechanical positioning mechanisms with an automated cart system that uses sensors and programmable motion control to achieve precise dispense patterns. The positioner assembly electronically controls nozzle movement along predetermined paths, ensuring uniform coffee bed saturation without requiring intricate mechanical linkages, thereby achieving distribution uniformity through intelligent automation rather than mechanical complexity
3Productivity
If heating time is reduced for efficiency, then productivity is improved, but energy consumption increases
Solution Approach 1:
The system pre-heats water to the target temperature before the actual dispense cycle begins, and maintains this temperature through insulated holding chambers. By preparing the water in advance and keeping it at optimal temperature during idle periods, the system reduces the heating time required during active brewing, thereby improving productivity without proportionally increasing energy consumption as the thermal energy is retained rather than continuously reheated
4Device complexity
If manual operation is used, then device complexity is reduced, but water temperature consistency deteriorates
Solution Approach 1:
The automated control system incorporates temperature sensors and proportional-integral-derivative (PID) control algorithms that continuously monitor and adjust heating element power to maintain water temperature within ±1°F of the target. This feedback mechanism eliminates the temperature variability inherent in manual operation while using a relatively simple heating assembly, achieving superior temperature consistency without excessive complexity
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 system achieves consistent and accurate water temperature and distribution, enhancing the quality of brewed coffee by reducing heating time and energy consumption while maintaining uniform moisture distribution in coffee grounds.
Implementation Method 1
a heating element configured to heat metered volumes of water received from the water reservoir
Implementation Method 2
a temperature sensor configured to output a signal representing a temperature of water exiting the heating element
Data Source
AI summary
One variation of an automated boiler includes: a container including a reservoir configured to store a volume of water, a heating element, and a temperature sensor; a hose fluidly coupled to the heating element; a nozzle coupled to the hose and configured to dispense volumes of water into a pour-over setup loaded with coffee grounds; a lid coupled to the container; a positioner assembly—arranged within the lid—including an arm extending from the lid and configured to retain the nozzle, and, a set of positioner actuators configured to drive translation of the arm; and a controller configured to actuate the heating element to regulate temperature of water toward a dispense temperature based on a signal output by the temperature sensor, and, actuate the set of positioner actuators to drive the nozzle across a sequence of positions to dispense water into the pour-over setup according to a target dispense pattern.