Self-cleaning coffee machine
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Coffee machines often produce coffee with water contaminated by stuck and encrusted ground coffee residues on the conduit, requiring manual cleaning cycles that are inconvenient and can lead to reduced performance during peak usage.
Innovation Solution
A coffee machine equipped with a presence sensor that automatically initiates a cleaning cycle when the filter holder is uncoupled, using a timer and switch to control the supply and heating device to flush out residues, ensuring clean water is always dispensed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If manual cleaning cycles are implemented to remove ground coffee residues from the conduit, then water quality is improved, but machine performance and productivity deteriorate due to downtime and extended coffee preparation intervals
Solution Approach 1:
The system performs cleaning action in advance by automatically initiating a purging cycle when the filter holder is removed, before the next coffee preparation begins. This preliminary cleaning removes residues while the machine is naturally idle during filter replacement, preventing contamination of subsequent coffee without extending preparation time.
Solution Approach 2:
The coffee machine performs self-cleaning automatically through the control unit detecting filter holder removal via presence sensor, triggering the purging cycle without requiring user intervention. The system serves itself by autonomously managing the cleaning process, eliminating residues before they can contaminate next coffee preparation.
2Productivity
If cleaning operations are delayed to maintain high productivity during peak usage, then machine performance is improved, but water quality deteriorates due to accumulated residues and encrustations
Solution Approach 1:
The system implements periodic cleaning cycles triggered by the removal of the filter holder, which occurs naturally between coffee preparations. This periodic action ensures residues are removed at regular intervals without requiring dedicated downtime, maintaining both productivity and water quality by aligning cleaning with the natural operational rhythm of the machine.
3Reliability
If the filter holder coupling mechanism is made secure to prevent accidental disconnection, then reliability is improved, but ease of operation deteriorates due to difficulty in uncoupling for cleaning
Solution Approach 1:
The coupling mechanism transitions from a static, permanently fixed connection to a dynamic, controllable connection. The bayonet-type coupling allows the filter holder to be easily inserted and secured during operation, then quickly released when the presence sensor detects removal, enabling both secure operation and easy cleaning access through user action on the coupling mechanism.
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 automatic cleaning cycle ensures that the conduit is cleaned every time coffee is dispensed, maintaining water quality without downtime or extending coffee preparation intervals, even during high-demand periods.
Implementation Method 1
it comprises a presence sensor (15) connected to the control unit (13) in order to detect the presence of the filter holder (9) under the conduit (8)
Implementation Method 2
the water supply from the conduit (8) to clean the conduit (8)
Implementation Method 3
The control unit (13) comprises a timer (18) that is connected to the switch (17) in order to manage the opening/closing of the switch (17)
Data Source
AI summary
A coffee machine has a body, a dispensing unit, a conduit, a supply and heating device, a filter holder, fast coupling/uncoupling means to couple the filter holder under the conduit, a control unit, a presence sensor to detect the presence of the filter holder under the conduit, and a switch to enable the passage of electrical current towards the supply and heating device and towards the dispensing unit when the presence sensor detects that the filter holder is uncoupled from the fast coupling/uncoupling means. The control unit has a timer to manage the opening/closing of the switch.