Coffee Machine Brewing Unit Filling Path for Anti-Static Powder Flow
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Solution Overview
Problem
Existing coffee machine brewing units face issues with electrostatic charging of coffee powder during the grinding and filling process, leading to uneven distribution and hygiene problems due to powder scattering and adherence to surfaces, which can result in clogging and electrostatic repulsion of further powder.
Innovation Solution
A brewing unit design featuring a projection and outlet area arrangement that creates a gap between the overhang and side wall, allowing coffee powder to fall directly into the brewing chamber without electrostatic charging, reducing interaction between charged particles and preventing powder from sticking to surfaces, thus minimizing deposits and maintaining hygiene.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If ground material is filled into the brewing chamber through the filling opening, then the brewing chamber can be filled with coffee powder, but electrostatic charging causes powder grains to scatter on the top of the brewing unit instead of trickling through the filling opening
Solution Approach 1:
A conductive element is introduced as an intermediary component between the filling opening and the brewing chamber. This conductive element serves as a mediator that receives charged powder grains through the filling opening and conducts them into the brewing chamber, preventing electrostatic scattering while maintaining the filling function.
Solution Approach 2:
The electrical properties of the filling path are changed by introducing a conductive element. This parameter change transforms the insulating path into a conductive path, allowing charged powder grains to be conducted rather than scattered, thereby resolving the electrostatic scattering problem while maintaining filling capability.
2Quantity of substance
If the brewing chamber is filled with large quantity of powder to maximum capacity, then the brewing chamber can be fully loaded, but there is undesirably large distribution of powder grains on the upper side of the brewing unit
Solution Approach 1:
The conductive element acts as an intermediary that channels all powder grains directly into the brewing chamber even when filling to maximum capacity. This intermediary path prevents powder grains from scattering on the upper side of the brewing unit, ensuring that full loading does not result in unwanted powder distribution.
3Productivity
If powder grains are scattered on the upper side of the brewing unit, then filling can be completed, but hygiene problems occur due to warm and humid climate during coffee drawing
Solution Approach 1:
The conductive element serves as a mediator that ensures all powder grains are conducted directly into the brewing chamber during filling. This eliminates powder accumulation on the upper side of the brewing unit, preventing hygiene contamination that would occur in the warm and humid environment during coffee drawing operations.
4Reliability
If a conductive element is introduced to prevent electrostatic scattering, then powder can be conducted into the brewing chamber, but the element may become clogged with adhering powder
Solution Approach 1:
The surface properties of the conductive element are optimized to balance conductivity with anti-adhesion characteristics. By adjusting parameters such as surface roughness, material composition, or coating properties, the element maintains electrical conductivity to prevent electrostatic scattering while minimizing powder adhesion that could lead to clogging.
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 design effectively reduces electrostatic repulsion and powder scattering, ensuring coffee powder reaches the brewing chamber without sticking to surfaces, thereby preventing clogging and maintaining cleanliness, even with large quantities of ground material.
Implementation Method 1
Due to electrostatic charging of the material to be ground during the grinding process and due to other possible disruptive effects, the undesirable effect that During the filling process, the individual powder grains of the ground material sometimes do not trickle through the filling opening of the brewing chamber into it, but are scattered on the top of the brewing unit as a result of the electrostatic charge.
Implementation Method 2
A conductive element is introduced which conducts the coffee powder into the brewing chamber in order to prevent adherence of the coffee powder to the filling opening and to the upper side of the brewing unit.
Data Source
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AI summary
The invention specifies a brewing unit (100) for a coffee machine. Within the brewing unit (100), a brewing chamber (150), which is arranged in a pivotable brewing cylinder (152), can be filled with ground coffee powder by means of a filling device (20). For the purpose of introducing the coffee powder, the brewing chamber (150) has a filling opening (151). With the aim of avoiding undesired deposits of grounds in the region of the upper side of the brewing unit (100), and also of improving levels of hygiene, the solution according to the invention provides a projection (110), which extends in the filling direction outside the brewing chamber (150), wherein the projection (110) is such that the exit region (22) of the filling device (20) is introduced with the formation of an interspace (200) between the projection (110) and a side wall of the exit region (22) such that the projection substantially fully surrounds the exit opening (25) of the exit region (22). Coffee powder supplied in the filling device (20) drops from the exit opening (25) of the exit region (22), directly through a through-opening (110') of the projection (110) and the filling opening (151), into the brewing chamber (150) without striking against the projection (110).