Milk Foam System with Bypass Flow Path for Rapid Temperature Switching
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Solution Overview
Problem
Existing methods for producing temperature-controlled milk foam and milk, such as those used in beverage makers, face challenges with complex line systems, contamination, bacterial growth, and delays in temperature changes, particularly when switching between hot and cold milk or foam production, leading to inefficient and unprofitable operations.
Innovation Solution
A method and apparatus utilizing a thick-film heating element that remains permanently in an active state, with a fluid line system that applies water between milk deliveries to maintain temperature control, avoiding parallel flow paths and thermal delays, and employing a manifold valve for efficient fluid management to ensure quick temperature adjustments and prevent overheating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heating element is switched off to provide cold milk foam, then cold milk foam can be provided, but the heating element takes time to cool down and may still heat the milk foam
Solution Approach 1:
The system is divided into two separate flow paths: a first flow path for cold milk foam that bypasses the heating element, and a second flow path for hot milk foam that goes through the heating element. This segmentation allows independent temperature control without waiting for the heating element to cool down.
Solution Approach 2:
The system prepares both hot and cold flow paths in advance, so when cold milk foam is requested, the system can immediately direct milk through the first flow path without needing to cool the heating element first. The bypass path is already ready for immediate use.
2Temperature
If parallel flow paths are provided for hot and cold milk, then temperature control is improved, but the line system becomes complex and cleaning becomes difficult
Solution Approach 1:
The system merges the advantages of parallel flow paths with a single-line design by using a three-way valve that can direct flow through different paths. The milk line remains single throughout, but the valve creates functional parallelism, allowing hot and cold modes without multiple separate lines. This simplifies cleaning while maintaining temperature control.
Solution Approach 2:
The single milk line and heating element serve multiple functions: they can handle both hot and cold milk foam by switching the flow path with the three-way valve. The heating element can either heat milk or be bypassed for cold milk, making the single line system universally applicable for both temperature requirements.
3Device complexity
If a single flow path is used for both hot and cold milk, then the line system is simple, but the heating element cannot be cooled quickly between hot and cold servings
Solution Approach 1:
The single milk line is functionally segmented into two paths using a three-way valve: one path goes through the heating element for hot milk, while the other path bypasses the heating element for cold milk. This allows the simple single-line structure to achieve rapid temperature switching without physical complexity.
4Speed
If the heating element is permanently active to ensure quick temperature control, then temperature response is fast, but energy consumption increases
Solution Approach 1:
Instead of keeping the heating element permanently active, the system uses periodic action by switching the heating element on only when hot milk foam is required and turning it off when cold milk foam is requested. The three-way valve enables this periodic operation by directing flow appropriately, reducing energy consumption while maintaining fast temperature response when needed.
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 rapid and reliable production of cold, warm, or hot milk foam/milk without delays, reducing contamination risks and maintaining high-quality milk products by maintaining the heating element at a consistent high temperature, ensuring precise temperature control and preventing overheating.
Implementation Method 1
The heating element in which the milk or milk foam is temperature-controlled and possibly produced can be a flow heater... The thick-film heating element is thereby set up so that a small quantity of milk of about 40 to 60 ml in the foamed state and with a temperature of less than about 7° C. is heated
Implementation Method 2
For reasons of shelf-life and hygiene, the milk is stored in a cool place, especially at temperatures between 3° C. and 7° C.
Data Source
AI summary
A method for selectively producing cold, warm or hot milk foam and/or milk includes providing at least one container for storing milk to be foamed, providing a fluid and a fluid line, conveying, by a pump, a predefinable amount of the milk to be foamed through a line system, which includes a milk intake line, between the at least one container and the pump, and an outlet line, between the pump and at least one outlet, potentially supplying air into the milk intake line via an air-flow regulator, which can be arranged in an air-supply line, in order to produce a milk/air mixture upstream of the pump, conveying the milk/air mixture or the milk through a heating element, producing a milk foam from the milk/air mixture by a throttle device; and dispensing the milk foam or milk at the at least one outlet. An apparatus is also provided.