Beverage Outlet Filtration Layout for Low-Bacteria Dispensing
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Solution Overview
Problem
Existing beverage preparation devices face challenges in maintaining low bacterial loads in dispensed beverages without heating the liquid to boiling point, requiring complex components or frequent filter replacements, and are not suitable for both hot and cold beverages.
Innovation Solution
A beverage preparation device with a structurally simple and economic design that positions a bacterial filter downstream of the dispensing outlet, using a trickle-type filter and a heating element positioned downstream of the pump to maintain optimal liquid flow, and includes a temperature detection system to prevent overheating, allowing for effective bacterial filtration without boiling the liquid.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a bacterial filter is placed in the water inlet section or tank, then the water quality is improved, but bacteria and dirt accumulate on pump and heating elements leading to high bacterial load in dispensed beverage
Solution Approach 1:
The filter is inverted from its conventional position upstream of the pump to a downstream position after the heating element and before the dispensing outlet. This reversal allows the filter to capture bacteria that may have accumulated on internal components, ensuring that only filtered liquid is dispensed while preventing bacterial regrowth in the filtration element itself.
Solution Approach 2:
The filtration function is extracted from the water inlet section and relocated to the dispensing outlet area. This separation allows the filter to operate independently in a position where it can effectively remove bacteria without interfering with pump operation or heating element function, while also preventing bacterial accumulation on these components.
2Reliability
If heating means like steam generator are used to reduce bacterial adhesion, then bacterial proliferation is reduced, but the beverage temperature becomes too high for infant consumption
Solution Approach 1:
The steam generator heating system is replaced with a simple electric heating element positioned upstream of the filter. This substitution provides sufficient heat to reduce bacterial adhesion without the excessive temperatures produced by steam generators, and the downstream filter ensures bacterial removal without requiring high-temperature sterilization.
Solution Approach 2:
The heating parameters are changed from high-temperature steam generation to moderate-temperature electric heating. This parameter change allows effective bacterial reduction through moderate heating while maintaining the beverage at a safe temperature for infant consumption, with the filter providing the primary bacterial removal function.
3Quantity of substance
If a filter is placed in cartridges containing the beverage product, then filtered water can be used, but the filter must be replaced every time the machine is used
Solution Approach 1:
Instead of requiring complete filter replacement with each cartridge change, the filter is designed to be reusable and positioned independently of the consumable cartridge. The filter receives fresh water from the cartridge and provides continuous filtration, extending its service life beyond single-use while maintaining effective bacterial removal.
Solution Approach 2:
The system is segmented into disposable cartridge components and reusable filtration components. The cartridge containing the beverage product remains disposable for hygiene, while the filter is separated into a permanent, cleanable component that does not require frequent replacement, reducing waste and operational complexity.
4Reliability
If additional components like heating means downstream of the filter are added, then bacterial adhesion is reduced, but the device becomes more costly and complex
Solution Approach 1:
A simple electric heating element is positioned as an intermediary between the water pump and the bacterial filter. This intermediary component provides moderate heating to reduce bacterial adhesion upstream of the filter without requiring complex steam generation systems, and the filter subsequently removes any bacteria that may have adhered during passage through the heating element.
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 device achieves low bacterial load in beverages without additional components or complex mechanisms, maintaining suitable temperatures for infant consumption and accommodating both hot and cold beverages, while reducing the need for frequent maintenance and filter replacements.
Implementation Method 1
using a trickle-type filter and a heating element positioned downstream of the pump to maintain optimal liquid flow, and includes a temperature detection system to prevent overheating, allowing for effective bacterial filtration without boiling the liquid
Implementation Method 2
positions a bacterial filter downstream of the dispensing outlet, using a trickle-type filter
Data Source
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AI summary
A beverage preparation device comprising a main body, a tank, an assembly for pumping a liquid from the tank, and a unit for preparing the beverage, in which device an outlet path is defined inside the main body, the outlet path comprising a dispensing outlet, via which the beverage is dispensed out of the main body, and also comprising a filtering element that is detachably connected to the main body, wherein the filtering element is arranged downstream of the dispensing outlet relative to the outlet path.