Milk-Air Emulsion Production with Conductivity-Based Feedback Control

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Solution Overview

Problem

Existing methods for producing milk-air emulsions, such as milk froth, lack continuous monitoring and adjustment capabilities, affecting the quality and consistency of milk-containing beverages.

Innovation Solution

A method and device that control the production of milk-air emulsions based on physical material characteristics, using sensors to measure conductivity and adjust air pressure, milk flow, and heating to achieve desired consistency and temperature specifications.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If conventional methods for producing milk-air emulsions are used, then the production process is simple, but the quality and consistency of milk froth cannot be continuously monitored and adjusted

Engineering Contradiction:
Improvemilk froth quality consistencyVSAvoidproduction system complexity
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent implements continuous monitoring of milk froth quality using measurement units that detect physical material characteristics (such as conductivity, temperature, or density). The control unit receives this feedback information and automatically adjusts process parameters (air pressure, milk flow rate, heating power) to maintain consistent froth quality. This closed-loop feedback system resolves the contradiction by enabling precise quality control without requiring complex manual intervention.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The patent replaces manual monitoring and adjustment of milk froth quality with automated electronic measurement and control systems. Sensors detect physical characteristics of the emulsion, and electronic control units adjust process parameters automatically, substituting mechanical/manual operations with electronic systems. This enables consistent quality control while keeping the overall system architecture relatively simple through automation.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If physical material characteristics are continuously measured and adjusted, then the quality of milk-air emulsion is consistently monitored, but the complexity of the control system increases

Engineering Contradiction:
Improveemulsion quality stabilityVSAvoidcontrol and measurement system complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The control unit continuously receives measurement data from measurement units monitoring physical material characteristics of the milk-air emulsion (such as conductivity, temperature, or density). Based on this feedback, the control unit automatically adjusts process parameters to maintain quality within specified ranges. This feedback mechanism ensures reliable and stable emulsion quality while automating the control process to manage system complexity.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The system is designed to automatically monitor and adjust itself without external intervention. The measurement units continuously assess emulsion quality, and the control unit self-adjusts process parameters (air pressure, milk flow, heating) based on predetermined quality specifications. This self-service capability ensures consistent quality while minimizing the need for complex external control systems.

Inventive Principle:
Principle #25Self-service

3Manufacturing precision

If multiple process parameters (air pressure, milk flow, heating) are adjusted based on physical material characteristics, then the consistency of milk froth is improved, but the complexity of process control increases

Engineering Contradiction:
Improvemilk froth consistencyVSAvoidprocess control simplicity
Core Design Contradiction:
Manufacturing precisionVSEase of operation

Solution Approach 1:

The control unit automatically adjusts multiple process parameters (air pressure, milk flow rate, heating power) based on real-time feedback from measurement units monitoring physical material characteristics of the milk-air emulsion. This automated feedback control ensures consistent milk froth quality while eliminating the need for manual coordination of multiple parameters, thereby simplifying operation despite the complexity of controlling multiple variables.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The patent replaces manual control of multiple process parameters with an automated electronic control system. Sensors detect physical characteristics of the emulsion, and electronic control units automatically adjust air pressure, milk flow, and heating parameters. This substitution of manual mechanical control with electronic automation achieves precise consistency while simplifying the ease of operation, as the system self-regulates without requiring operator expertise in coordinating multiple parameters.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

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

Enables continuous monitoring and adjustment of milk-air emulsion quality, ensuring consistent milk froth production for both hot and cold beverages, improving taste and appearance.

Implementation Method 1

The physical material characteristic advantageously can be the electrical conductivity of the milk-air emulsion. This material characteristic can be determined with conductivity sensors having comparatively low fluctuation tolerances.

Methodology Applied
Scientific EffectElectrical conductivity measurement: Conduction (electrical)

Implementation Method 2

For an indirect heating, e.g. through heat exchange with a heating medium or an electric heating element, a heating wire or the like is provided for heating the milk froth to a warm temperature T23. The temperature T3 of the hot milk froth preferably ranges from 55° C. to 80° C. while the warm milk froth temperature T2 is a denaturizing temperature, in particular a temperature T2 ranging from 40° C. to 54° C.

Methodology Applied
Scientific EffectDirect heating with steam: Condensation

Implementation Method 3

For an indirect heating, e.g. through heat exchange with a heating medium or an electric heating element

Methodology Applied
Scientific EffectHeat exchange: Heat Exchanger

Data Source

PatentUS10568455B2Method and device for producing milk-air emulsions
Publication Date: 2020.02.25 MELITTA PROFESSIONAL COFFEE SOLUTIONS GMBH & CO
  • US10568455B2 patent drawing
  • US10568455B2 patent drawing

AI summary

A method for producing different types of milk-air emulsions with a milk-air emulsion generating device, comprising: producing the milk-air emulsions in dependence on at least one determined physical material characteristic of the milk-air emulsion.