Espresso coffee machine with system for cleaning the coffee dispensing system
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Solution Overview
Problem
Espresso coffee machines face issues with clogging and alteration of organoleptic properties due to small coffee particles rising back into the dispensing and discharging systems, requiring frequent and cumbersome maintenance, which affects the uniformity of water flow and efficiency of the coffee preparation process.
Innovation Solution
An espresso coffee machine equipped with a steam cleaning system that uses steam from the existing boiler to clean the dispensing and discharging circuits, including the screen and diffuser, to efficiently remove used coffee particles, thereby reducing maintenance needs and preserving the quality of espresso coffee.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the screen and dispensing system are left in place during dispensing operations, then the coffee preparation process continues efficiently, but coffee particles accumulate and cause clogging and organoleptic deterioration
Solution Approach 1:
The system performs preliminary cleaning action by flushing hot water through the dispensing system components (screen, diffuser, ducts) before coffee particles can accumulate to problematic levels. This continuous or periodic flushing prevents particle buildup while maintaining operational efficiency.
Solution Approach 2:
The cleaning system operates continuously or periodically during and between dispensing operations, maintaining constant water flow through the dispensing components to continuously remove coffee particles, thus eliminating idle time and maintaining both productivity and cleanliness.
2Reliability
If the screen is disassembled for cleaning after each dispensing operation, then the system is cleaned thoroughly, but the maintenance process becomes time-consuming and cumbersome
Solution Approach 1:
The dispensing system cleans itself by utilizing the existing water flow and pressure systems to flush through the screen, diffuser, and ducts, removing the need for manual disassembly and cleaning operations. The system performs its own maintenance automatically.
Solution Approach 2:
The cleaning function is merged with the existing water dispensing system, using the same pump, boiler, and piping infrastructure already present in the coffee machine. This eliminates the need for separate cleaning equipment and reduces maintenance complexity.
3Reliability
If hot water flows continuously through the dispensing system, then coffee particles are flushed out effectively, but water consumption increases
Solution Approach 1:
Instead of continuous water flow, the system implements periodic flushing cycles at strategically timed intervals (e.g., between dispensing operations or after detected particle accumulation). This maintains cleaning effectiveness while significantly reducing overall water consumption compared to continuous flow.
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 steam cleaning system effectively prevents clogging, maintains the organoleptic properties of espresso coffee, ensures uniform water flow, and reduces maintenance requirements, allowing for prolonged intervals between maintenance operations.
Implementation Method 1
a system for supplying steam to said dispensing group so as to perform cleaning of at least a part of said dispensing system
Implementation Method 2
The flow of hot water through the aforementioned components continues for the entire duration of dispensing of the beverage
Data Source
AI summary
An espresso coffee machine is described, said machine comprising a pump (1) for pumping water, a dispensing group (25) configured to cooperate with a portafilter (35), wherein said portafilter (35) is configured to support a filter (40) loaded with coffee powder, a coffee boiler (15) in fluid communication with said dispensing group (25), a water dispensing system (16, 28, 29, 30) for supplying hot water from said coffee boiler (15) to said portafilter; and a system (16, 31, 6, 33, 14) for supplying steam to said dispensing group (25) so as to perform cleaning of at least a part of said water dispensing system (16, 28, 29, 30).