Conductive Capsule Sensing Circuit for Reliable Brewing Unit Detection
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Solution Overview
Problem
Existing beverage preparation machines with capsule recognition systems face reliability and cost issues due to complex and expensive optical recognition systems that are prone to interference and premature failure in harsh brewing environments.
Innovation Solution
A brewing unit with a capsule sensing electric circuit using electrically conductive capsules, where the presence and type of capsules are detected by analyzing the electrical characteristics between first and second electric connectors, providing a simple, reliable, and cost-effective sensing system that is not affected by environmental cleanliness or capsule orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If optical recognition systems are used for capsule detection, then capsule identification capability is improved, but system reliability deteriorates due to interference and premature failure in harsh brewing environments
Solution Approach 1:
The patent replaces the optical recognition system with an electrical sensing system. Instead of using optical emitters and sensors that are prone to interference and failure, the invention uses electrical connectors that make contact with the capsule to detect its presence and characteristics. This substitution of optical detection with electrical detection eliminates the reliability issues associated with optical systems in harsh brewing environments while maintaining capsule identification capability.
Solution Approach 2:
The patent employs a simple electrical sensing system with connectors that are less expensive and more durable than optical systems. The electrical sensing components are robust against the harsh conditions in beverage preparation machines, eliminating the need for complex optical components that require maintenance and replacement.
2Difficulty of detecting and measuring
If optical recognition systems are used for capsule detection, then capsule identification capability is improved, but device complexity and cost increase
Solution Approach 1:
The patent replaces complex optical recognition systems with simple electrical sensing circuits. Instead of requiring optical emitters, sensors, and associated control electronics, the invention uses basic electrical connectors and a sensing circuit that detects electrical characteristics of the capsule. This dramatically reduces device complexity while maintaining the ability to identify capsule presence and type.
Solution Approach 2:
The electrical sensing system uses inexpensive electrical connectors and simple circuitry compared to optical systems. The sensing mechanism relies on basic electrical contact and measurement rather than complex optical components, reducing both device complexity and manufacturing cost.
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 solution enables automatic capsule recognition and machine parameterization, reducing energy consumption and carbon footprint while ensuring reliable operation and user convenience, with the ability to differentiate between capsule types and detect their presence or absence for efficient brewing processes.
Implementation Method 1
a capsule sensing electric circuit with first and second electric connectors, wherein the first electric connector and the second electric connector are: electrically connected through the electrically conductive material of the capsule when the capsule is present in the seat
Data Source
Figure 1~9
Figure 10~12
AI summary
A brewing unit (1) of a beverage preparation machine has: a seat (11) for receiving a capsule (2) comprising an electrically conductive material (21, 22, 23, 24); and a capsule sensing electric circuit with first and second electric connectors (A, B). The first electric connector (A) and the second electric connector (B) are electrically connected through the electrically conductive material of the capsule (2) when the capsule is present in the seat (11) and electrically disconnected when the capsule is not in the seat so as to close and interrupt, respectively, the capsule sensing electric circuit (A, Aa, a, B, Bb, b, abc).