Beverage Fluid Circuit Bypass Mixing to Prevent Over-Extraction
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Solution Overview
Problem
Existing beverage preparation machines using pre-portioned flavoring ingredient cartridges face issues with over-extraction when preparing large beverages, leading to undesirable compounds being extracted, which affects the quality of the beverage, especially in coffee preparation.
Innovation Solution
A beverage preparation machine with a fluid circuit that circulates a portion of the liquid through the flavoring ingredient and bypasses another portion to mix with the flavored liquid, preventing over-extraction by adjusting the liquid volume in contact with the flavoring ingredient.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a large volume of liquid is circulated through the flavoring ingredient to prepare large beverages, then the beverage quantity is sufficient, but over-extraction occurs causing undesirable compounds to be extracted and beverage quality to deteriorate
Solution Approach 1:
The liquid flow is segmented into two separate paths: a first path (extraction circuit) that circulates liquid through the flavoring ingredient for a controlled duration to extract desirable compounds, and a second path (bypass circuit) that directs additional liquid around the flavoring ingredient. This segmentation allows the system to deliver large beverage volumes without subjecting the flavoring ingredient to excessive liquid contact that would cause over-extraction of undesirable compounds.
Solution Approach 2:
A control valve acts as an intermediary element that regulates the distribution of liquid between the extraction circuit and bypass circuit. By controlling the valve opening, the system can precisely adjust the proportion of liquid that contacts the flavoring ingredient versus the liquid that bypasses it, thereby preventing over-extraction while ensuring sufficient beverage volume.
2Quantity of substance
If the liquid circulation time through the flavoring ingredient is extended to increase beverage volume, then more beverage is produced, but extraction quality decreases due to over-extraction
Solution Approach 1:
The extraction process is segmented in time and flow: liquid first passes through the extraction circuit for a controlled, limited duration to extract desirable compounds, then additional liquid flows through the bypass circuit without contacting the flavoring ingredient. This temporal and spatial segmentation ensures that the flavoring ingredient is exposed to liquid only for the optimal extraction window, preventing over-extraction while still producing large beverage volumes through the combined output of both circuits.
Solution Approach 2:
The system applies partial action by having only a portion of the total liquid volume required for large beverages actually contact the flavoring ingredient. The remaining liquid bypasses the ingredient entirely, yet both streams contribute to the final beverage. This partial contact approach maintains extraction quality while achieving the desired beverage volume through the combination of extracted and bypassed liquid.
3Device complexity
If a fixed-volume ingredient chamber is used for all beverage sizes, then device complexity is reduced, but over-extraction occurs for large beverages
Solution Approach 1:
Instead of modifying the ingredient chamber structure for different beverage sizes, the system segments the liquid flow into two circuits: an extraction circuit that maintains consistent, optimal liquid contact with the flavoring ingredient regardless of chamber volume, and a bypass circuit that handles the additional liquid volume needed for large beverages. This flow segmentation allows a fixed-volume chamber to serve multiple beverage sizes without over-extraction.
Solution Approach 2:
The extraction circuit and bypass circuit share common components (pump, heater, ingredient chamber), allowing these components to serve multiple functions. The pump delivers liquid to both circuits, the heater heats liquid for both paths, and the ingredient chamber serves as the extraction medium for the extraction circuit while also being part of the overall large beverage preparation system when bypass liquid is added. This multi-functionality maintains device simplicity while preventing over-extraction.
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 approach allows for the preparation of large-size beverages without over-extracting the flavoring ingredient, maintaining beverage quality by controlling the amount of liquid in contact with the flavoring ingredient, thus preventing the extraction of undesirable compounds.
Implementation Method 1
a liquid flavouring arrangement for circulating a liquid through a flavouring ingredient to flavour the liquid
Implementation Method 2
a dilution arrangement for mixing the liquid unflavoured with the flavoured liquid upon flavouring
Data Source
AI summary
A beverage preparation machine (1) has a fluid circuit (3-10c) that comprises a liquid flavoring arrangement (9a, 3, 4, 5) for circulating a liquid, such as water, through a flavoring ingredient (2, 2′) to flavor this liquid and for dispensing this flavored liquid to a user-receptacle (100). The fluid circuit further comprises a dilution arrangement (9b, 9′, 9″) for mixing the liquid unflavored with the flavored liquid upon flavoring.