Milk Foaming Chamber Air Pulse Control for Consistent Microfoam
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Solution Overview
Problem
Existing devices for foaming liquid foodstuffs, such as milk, face challenges in producing consistent foam due to varying temperatures, fat content, and viscosity, making it difficult to achieve uniformly fine pore sizes and stability, especially in the fine-dining industry for mixed coffee-milk drinks.
Innovation Solution
A device with a control unit and intermittent air valve that allows precise control of air flow through repeated switching between high and low flow states, utilizing the Venturi effect for air supply, and a pump for liquid feed, enabling exact specification of foam consistency and volume by adjusting pulse-duty ratio and switching frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual throttle valves are used to regulate air flow and milk flow, then the device structure remains simple, but the control precision of air flow is insufficient and cannot achieve high-precision foam consistency control
Solution Approach 1:
The patent replaces manual mechanical throttle valves with an electronically controlled intermittent air valve system. The control unit sends electrical signals to the air valve to switch between open and closed states, substituting manual mechanical regulation with automated electronic control, thereby achieving precise control of air flow and foam consistency.
Solution Approach 2:
The control unit automatically regulates the air valve based on pre-stored program parameters, enabling the system to self-adjust the air flow without manual intervention. This automated self-service mechanism ensures consistent foam quality while reducing operational complexity for the user.
2Manufacturing precision
If continuous air flow is used through the air feed line, then the air supply is simple and stable, but the foam consistency cannot be precisely controlled for different starting materials and desired foam types
Solution Approach 1:
The patent implements periodic action by controlling the air valve to switch intermittently between open and closed states according to a predetermined cycle. This periodic switching allows precise control of the average air flow rate, enabling different foam consistencies to be achieved for various starting materials and desired foam types, while the control unit automates the process to maintain ease of operation.
3Manufacturing precision
If the air valve switches frequently between open and closed states, then the average air flow control precision is improved, but the valve wear and system reliability may decrease
Solution Approach 1:
The patent applies dynamics by making the air valve switchable between states rather than remaining fixed. The intermittent switching between open and closed states allows dynamic adjustment of air flow to achieve precise average flow control. The system is designed to handle the switching operations, balancing precision requirements with component durability through appropriate switching frequency selection and valve design.
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 solution allows for high-precision control of foam consistency and volume, achieving uniformly fine pore sizes and stability, and enabling the production of different foam consistencies for various starting parameters, including temperature and viscosity, with the ability to change foam consistency during the process.
Implementation Method 1
air and the milk is suctioned utilizing the Venturi effect due to the steam flow
Data Source
AI summary
A device for foaming a liquid foodstuff, in particular, milk, including a foaming chamber (5), a foodstuff feed line (4), a steam feed line (7), and an air feed line (8) is provided. The foodstuff, steam, and air feed lines are connected in a fluid-conducting manner to the foaming chamber (5). The air feed line (9) includes an air valve (10) that can be controlled by a control unit (9), and the air valve (10) is an intermittent air valve in which, by use of the control unit (9), at least one state with a high air flow and a state with relatively lower air flow and/or with no air flow can be specified selectively. The control unit (9) and air valve (10) have an interacting construction such that the average air flow of the air valve (10) can be controlled by repeated switching between the at least two states of the air valve (10). The invention further includes a method for foaming the liquid foodstuff.