Coffee Machine Preheating Method to Maintain Brewing Temperature
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Solution Overview
Problem
Coffee machines struggle to maintain consistent brewing temperatures due to heat loss in the fluid feed line and brewing device between heating and brewing, leading to undesirable temperature fluctuations, which affect the taste of coffee beverages, making them either too bitter or tasteless.
Innovation Solution
A method involving a brewing device with a brewing chamber and fluid system where heated fluid is preheated by being conveyed through the fluid feed line and brewing device before coffee powder is introduced, using a separate drainage outlet to manage residual fluid, allowing for precise temperature control and preheating of the brewing chamber.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If heated fluid is conveyed through the fluid feed line to the brewing chamber, then the brewing process can be performed, but heat loss occurs in the fluid feed line causing temperature reduction
Solution Approach 1:
The brewing device is preheated before the actual brewing process by conveying heated fluid through the fluid feed line and brewing device in advance. This preliminary heating action ensures that the fluid feed line and brewing device are at optimal temperature when coffee powder is introduced, preventing heat loss during the main brewing process and maintaining consistent brewing temperature.
Solution Approach 2:
The system uses the heated fluid itself to heat the fluid feed line and brewing device. The heated fluid that would otherwise be used for brewing serves a dual purpose by preheating the pathway and chamber it will traverse, eliminating the need for separate heating elements for the feed line and device.
2Stability of the object's composition
If the brewing device is preheated by conveying heated fluid through the fluid feed line, then temperature consistency is improved, but additional time is required before brewing can start
Solution Approach 1:
The system performs periodic preheating cycles at predetermined time intervals before brewing operations. This periodic action maintains the fluid feed line and brewing device at optimal temperature without requiring continuous heating, thus achieving temperature consistency while minimizing additional time requirements by only heating when necessary.
3Measurement precision
If a separate drainage outlet is added to discharge residual fluid, then temperature control precision is improved, but device complexity increases
Solution Approach 1:
The drainage outlet is extracted as a separate, independent component from the fluid outlet. This separation allows the drainage outlet to specifically handle residual fluid discharge for temperature control purposes, while the fluid outlet remains dedicated to dispensing brewed coffee. The functional separation improves temperature control precision without significantly increasing overall device 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
This method ensures a consistent brewing temperature within a desired range, enhancing the flavor of coffee beverages by compensating for heat losses and maintaining optimal brewing conditions.
Implementation Method 1
a heating device (24) for heating a fluid to a predetermined temperature
Implementation Method 2
a fluid pump (23) for conveying the fluid through the fluid line (21)
Implementation Method 3
conveying heated fluid through the fluid feed line into the brewing chamber for preparing a coffee beverage through brewing the coffee powder
Data Source
AI summary
A method for producing a coffee beverage in a coffee machine including: a brewing device having a brewing chamber that receives ground coffee and includes a fluid inlet and a fluid outlet; a fluid system having a fluid feed line connected to the inlet and a fluid conveyor conveying a heated fluid through the feed line. The method includes: (a) introducing ground coffee into the chamber, (b) conveying heated fluid through the feed line into the chamber for brewing the ground coffee in the chamber and dispensing the beverage through the fluid outlet. Before step (a), heated fluid is fed through the feed line into the chamber and at least a part of this heated fluid is dispensed through a drainage outlet separate from the fluid outlet and fluidly communicating with the chamber and/or the feed line, to preheat the feed line and the brewing device before beverage preparation.