Coffee Machine Heat Exchanger for Fast Stable Extraction
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Solution Overview
Problem
Coffee machines using capsules or manual filters face issues with long heating times, temperature fluctuations, and high energy consumption, which result in inefficient coffee preparation and inconsistent quality.
Innovation Solution
A coffee machine with a heat exchanger featuring a tubular element and an air chamber, heated by electromagnetic induction, maintains water at an optimal temperature of 92° C. to 94° C. for extended periods, even when the heating means are switched off, and regulates water flowrate and pressure for different coffee types, ensuring consistent extraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the heating means heat all the water inside the boiler to the correct temperature, then the water reaches the required temperature for coffee extraction, but the machine heating time becomes long and energy consumption increases
Solution Approach 1:
The patent divides the water heating system into two separate circuits: a first circuit with a first boiler for heating water to extraction temperature, and a second circuit with a second boiler for heating water to dispensing temperature. This segmentation allows each boiler to be optimized for its specific function and operate independently, reducing the time to prepare coffee water.
Solution Approach 2:
The first boiler continuously maintains water at the correct extraction temperature (90°C) in advance, so when coffee preparation is requested, the water is already ready. This preliminary heating action eliminates the need to wait for heating during the dispensing process.
2Use of energy by moving object
If the heating means are switched off after reaching the required temperature, then energy consumption is reduced, but the water temperature fluctuates and cools down
Solution Approach 1:
The heating means operate periodically rather than continuously. The controller activates the heating means only when the water temperature drops below the threshold, and switches them off when the threshold is reached. This periodic operation reduces energy consumption while maintaining temperature stability through timely reheating.
Solution Approach 2:
The system uses a temperature sensor to continuously monitor the water temperature and provides feedback to the controller. Based on this feedback, the controller intelligently controls the heating means to switch on when temperature drops and switch off when the threshold is reached, maintaining stable temperature with minimal energy consumption.
3Stability of the object's composition
If the heating means are kept always switched on to avoid temperature fluctuations, then temperature stability is maintained, but energy consumption increases significantly
Solution Approach 1:
The heating means operate periodically rather than continuously. The controller activates the heating means only when the water temperature drops below the threshold, and switches them off when the threshold is reached. This periodic operation reduces energy consumption while maintaining temperature stability through timely reheating.
Solution Approach 2:
The system uses a temperature sensor to continuously monitor the water temperature and provides feedback to the controller. Based on this feedback, the controller intelligently controls the heating means to switch on when temperature drops and switch off when the threshold is reached, maintaining stable temperature with minimal energy consumption.
4Temperature
If the water temperature is raised higher than required to compensate for heat loss along the fluid path, then the temperature at the capsule reaches the correct value, but the water may become too hot causing incorrect extraction
Solution Approach 1:
The patent separates the heating function into two independent boilers: the first boiler heats water to the precise extraction temperature (90°C) and delivers it to the capsule, while the second boiler heats water to a higher temperature for dispensing. This segmentation allows each system to be optimized independently, ensuring the extraction water reaches the correct temperature without overheating.
Solution Approach 2:
Different parts of the water heating system have different temperature requirements. The first circuit maintains water at 90°C for extraction, while the second circuit heats water to higher temperatures for dispensing. This local quality approach ensures each part receives the appropriate temperature for its specific function.
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 solution reduces waiting times, maintains optimal coffee extraction temperature, and significantly decreases energy consumption while allowing for versatile coffee preparation, including espresso and Americano, with precise control over temperature, flowrate, and pressure.
Implementation Method 1
A coffee machine with a heat exchanger featuring a tubular element and an air chamber, heated by electromagnetic induction
Implementation Method 2
a heat exchanger featuring a tubular element and an air chamber, heated by electromagnetic induction
Data Source
AI summary
A coffee machine having water heating means, a pump for supplying water into the heating means and a dispensing unit for extracting the coffee with the heated water is described. The heating means include a tubular element inside which the water supplied by the pump flows, and a heating element, separated from the tubular element by an air cavity; the pump and the heating element are connected and regulated by an electronic board, so as to supply into the dispensing unit the heated water in at least two different modes and at a same preset temperature, the different modes corresponding to different types of coffee to be dispensed.