Adjustable Plunger Brewing Head for Capsule Tolerance Compensation
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Solution Overview
Problem
Existing brewing heads for hot beverage machines have limited tolerance compensation, leading to malfunctions when capsules are inserted inattentively, and are costly due to strict dimensional requirements.
Innovation Solution
The brewing head features an adjustable plunger that can be adjusted relative to the brewing chamber parts, allowing for tolerance compensation and separate pressure control at the inlet and outlet piercing devices, enabling reliable capsule sealing and crema quality adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If strict dimensional requirements are imposed on brewing chamber parts, then reliability of capsule sealing is improved, but manufacturing cost increases due to tighter tolerances
Solution Approach 1:
The patent introduces an adjustable plunger that can be positioned at different locations along its axis, allowing the contact pressure and sealing parameters to be optimized. This adjustability compensates for manufacturing tolerances in the brewing chamber parts, enabling reliable sealing even with larger tolerances, thus reducing manufacturing costs while maintaining sealing reliability
2Reliability
If the brewing chamber parts are designed with narrow dimensional limits, then capsule insertion reliability is improved, but the device becomes less adaptable to different capsule variations
Solution Approach 1:
The plunger is designed with adjustable positioning capability, transforming a static sealing mechanism into a dynamic one. The plunger can be adjusted to different positions to accommodate variations in capsule dimensions, ensuring reliable insertion and sealing across different capsule types while maintaining adaptability
3Device complexity
If the plunger is fixed relative to the brewing chamber part, then device complexity is reduced, but tolerance compensation capability is limited
Solution Approach 1:
The brewing chamber is divided into two separable parts: a first brewing chamber part with a piercing device and a second brewing chamber part with an adjustable plunger. This segmentation allows the plunger to be independently adjusted relative to the piercing device, enabling tolerance compensation without significantly increasing overall device complexity
Data Source
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AI summary
A brewing head of a hot beverage preparation device for household purposes, having a brewing chamber for receiving a beverage substrate capsule (40), a movable brewing chamber part (10) in order to insert a capsule (40) into the brewing chamber, and a fixed brewing chamber part (11), with a piercing device (50; 60 ) for the capsule (40) in a first brewing chamber part (11) and with a tappet (16; 26) cooperating with the piercing device (50; 60) in the other, the second brewing chamber part (10) as an abutment for the capsule (50) when piercing and sealing, is developed according to the invention by a tappet (16; 26) that can be adjusted relative to the second brewing chamber part (10).