Brewing Chamber Volume Adjustment for Multi-Size Capsule Compatibility
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Solution Overview
Problem
Existing beverage preparation devices face challenges in adjusting brewing chamber volume to accommodate portion capsules of different sizes without complex and error-prone size detection arrangements, especially when capsules have identical edges but varying axial lengths.
Innovation Solution
A beverage preparation device with a brewing chamber that includes a cavity adjustable along a horizontal direction, featuring a blocking device with rotatable locking means to prevent movement of the base element, allowing for mechanical adjustment of the brewing chamber volume based on the portion capsule size, enabling automatic and error-free adaptation to different capsule volumes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a size detection arrangement is used to detect portion capsule size and adjust brewing chamber volume, then adaptability to different capsule sizes is improved, but device complexity and cost increase
Solution Approach 1:
The portion capsule itself performs the detection function by mechanically actuating the blocking device through its axial length. The capsule's physical dimension directly controls the base element position without requiring external sensors or detection systems. This eliminates complex detection arrangements while maintaining adaptability to different capsule sizes.
Solution Approach 2:
The patent replaces complex optical, magnetic, or electrical detection systems with a simple mechanical interaction. The portion capsule's axial length mechanically moves the blocking device, which in turn positions the base element to adjust brewing chamber volume. This mechanical substitution eliminates error-prone sensors while achieving the same adaptability function.
2Adaptability or versatility
If motor-driven adjustment of brewing chamber volume is used to accommodate different capsule sizes, then adaptability is improved, but device complexity and cost increase
Solution Approach 1:
The portion capsule autonomously determines the brewing chamber volume by its own physical dimension. The capsule's axial length directly actuates the blocking device and base element mechanism without requiring external motor control or electronic intervention. This self-service approach eliminates motors while maintaining adaptability.
Solution Approach 2:
Instead of using a motor to move the brewing chamber components to accommodate the capsule, the capsule itself moves the components by its presence and dimension. The inversion of the control direction eliminates the need for motors and complex control systems while achieving the same volume adaptation function.
3Measurement precision
If optical, magnetic, or electrical detection methods are used to determine portion capsule size, then measurement precision may be improved, but device complexity and error potential increase
Solution Approach 1:
The patent replaces optical, magnetic, or electrical detection methods with direct mechanical measurement. The portion capsule's axial length is measured by its physical interaction with the blocking device and base element mechanism. This mechanical measurement is inherently precise for the application while eliminating complex detection systems and their associated error sources.
Solution Approach 2:
The portion capsule performs its own size indication function through its physical dimension. The capsule's axial length directly determines the position of the blocking device and base element, providing inherent size information without requiring external sensors. This self-service approach achieves precise measurement while minimizing device complexity.
Data Source
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AI summary
The invention relates to a beverage preparation apparatus comprising a housing and brewing apparatus that is arranged in said housing and is intended for extracting a single-serve capsule of a first and a second type, which capsule contains a beverage substrate, wherein: a single-serve capsule of the first type has a greater axial length than a single-serve capsule of the second type; the brewing apparatus comprises a first brewing chamber element and a second brewing chamber element; the first brewing chamber element and the second brewing chamber element can be moved relative to one another along a predefined and substantially horizontal path from a loading position, in which the first brewing chamber element and the second brewing chamber element are mutually spaced apart, into an extraction position, in which the first brewing chamber element and the second brewing chamber element form a substantially closed brewing chamber and in which a brewing process can be carried out; the first brewing chamber element comprises a cavity provided for receiving the single-serve capsule; the cavity is axially delimited by a base element that can be adjusted in the horizontal direction between a starting position and a second position; the cavity has a larger volume in the second position than in the starting position; the first brewing chamber element has a blocking apparatus that can be actuated by the single-serve capsule and/or the second brewing chamber element; the blocking apparatus is provided to block, in the starting position or in the second position, a movement of the base element in the horizontal direction away from the second brewing chamber element.