Brewing module, capsule sensor module and machine for making beverages
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Solution Overview
Problem
Existing beverage preparation machines face challenges in accurately detecting capsule properties due to issues like steam-up and dirt affecting optical sensors near the brewing chamber, leading to inefficient capsule recognition.
Innovation Solution
A capsule recognition module with a reversible module cover that allows access to the capsule detection window for cleaning, combined with a transparent window at a non-perpendicular angle to reduce reflections and a fan for preventing fogging, enabling effective optical sensing of capsule properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the optical sensor is mounted close to the brewing chamber for capsule detection, then the capsule recognition can be performed in situ, but the sensor is affected by heat, water vapor and dirt leading to steam-up and reduced detection reliability
Solution Approach 1:
The device is divided into two separate access openings: one for capsule insertion and another for window access. This segmentation allows the optical sensor and window to be maintained separately from the brewing chamber environment while still enabling capsule detection, thus resolving the contradiction between close proximity detection and environmental protection.
Solution Approach 2:
A transparent capsule detection window serves as an intermediary element between the capsule and the optical sensor. The window allows optical detection to occur while physically separating the sensor from the harmful brewing chamber environment (heat, vapor, dirt), thereby maintaining both detection accuracy and sensor reliability.
2Reliability
If a window is provided for optical detection, then the sensor can be protected from the brewing chamber environment, but the window can fog up or get dirty complicating the readout process
Solution Approach 1:
The maintenance function is transferred to the user through the second access opening. Users can directly access and clean the capsule detection window themselves without requiring service intervention, allowing the window to be kept clear of condensation and dirt to maintain optical readout quality while still providing sensor protection.
3Strength
If the module cover is firmly connected to the module housing, then the structure is stable, but the cover cannot be easily opened for window access and cleaning
Solution Approach 1:
The cover structure is segmented into a removable module cover and a stationary module housing. The module cover can be easily removed to provide access to the capsule detection window for cleaning, while the module housing remains firmly connected to the brewing module for structural stability. This segmentation resolves the contradiction between easy access and structural strength.
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
Ensures reliable capsule recognition by minimizing disruptive influences from steam and dirt, allowing for accurate reading of capsule information and optimal brewing settings.
Implementation Method 1
an optical sensor, in particular a camera, for detecting optical properties of the capsule that is located at a capsule detection position
Data Source
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AI summary
The invention relates to a capsule-detecting module (5) for a brewing module for preparing a brewed drink from a single-serve capsule, comprising: an optical sensor, especially a camera, for detecting optical properties of the capsule located in a capsule detection position; a capsule detection window (52) made of a transparent material and arranged between the capsule detection position and the camera; and a module cover (18) which closes an access opening and is designed to be opened and/or removed without using any tools, the side of the capsule detection window (52) facing the capsule detection position being accessible through the access opening when the module cover (18) is open or removed.