Coffee press filter

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Solution Overview

Problem

Existing coffee press filters require frequent replacement of filter paper, leading to increased use costs, resource waste, and environmental pollution, and have complex spare and accessory parts that complicate assembly and cleaning.

Innovation Solution

A reusable coffee press filter design that integrates multiple components, including a filter pressing cylinder body, push rod, and bracket, with a tubular water injection cavity and a filtering cup, featuring a tower-type water injection column and flow guiding convex ribs, reduces spare parts to three while maintaining functionality, and allows for easy assembly and cleaning.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a single-use filter paper cover is installed at the bottom of the filtering cylinder, then coffee filtration is achieved, but the filter paper needs to be replaced after each use, increasing use cost, wasting resources, and polluting the environment

Engineering Contradiction:

Improvefiltration functionVSAvoidfilter paper waste

Core Design Contradiction:

ReliabilityVSLoss of substance

Solution Approach 1:

The patent replaces the disposable filter paper with a reusable metal filter screen. The metal screen can be cleaned and reused multiple times, eliminating the need to constantly discard and replace filter paper, thus reducing waste and environmental pollution while maintaining the filtration function.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

Instead of discarding the filter medium after one use, the patent enables recovery and reuse of the metal filter screen through cleaning. The screen is retained in the system and reused for subsequent brewing cycles, converting a disposable solution into a sustainable one.

Inventive Principle:

Principle #34Discarding and recovering

2Loss of substance

If a reusable coffee press filter is designed without filter paper, then resource waste is reduced and environmental pollution is minimized, but the structure has more spare and accessory parts, complicating assembly and cleaning

Engineering Contradiction:

Improvefilter paper wasteVSAvoidnumber of spare and accessory parts

Core Design Contradiction:

Loss of substanceVSDevice complexity

Solution Approach 1:

The patent combines the filter screen, pressing mechanism, and housing into an integrated assembly. The metal filter screen is positioned within the pressing chamber and works together with the plunger and housing as a unified structure, reducing the number of separate components that need to be assembled and cleaned individually.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The metal filter screen serves multiple functions: it filters the coffee grounds, supports the coffee powder during pressing, and can be cleaned and reused. This multi-functionality reduces the need for additional specialized components, simplifying the overall structure despite being reusable.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Adaptability or versatility

If multiple spare and accessory parts are used in the coffee press filter structure, then functionality is maintained, but assembly and cleaning become more complex

Engineering Contradiction:

Improvebrewing functionVSAvoidassembly and cleaning convenience

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The patent divides the coffee press filter into separable components including the housing, plunger, and metal filter screen assembly. This segmentation allows each component to be easily removed and cleaned separately, simplifying the cleaning process while maintaining the necessary brewing functionality through proper assembly of the parts.

Inventive Principle:

Principle #1Segmentation

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 simplified structure reduces production and packaging costs, enhances user convenience, and improves brewing efficiency with reduced spare parts, easier assembly, and efficient liquid discharge, while minimizing environmental impact by eliminating the need for disposable filter paper.

Implementation Method 1

multiple radially extended flow guiding convex ribs are uniformly distributed on the bottom surface, and the flow guiding convex ribs are uniformly distributed along a circumferential direction of the liquid outlet and extended to the inner wall of the accommodating cavity

Methodology Applied

Scientific EffectFluid flow guidance:

Implementation Method 2

the pressing cover is provided with a plurality of water outlets communicated with the brewing cavity and the water injection cavity

Methodology Applied

Scientific EffectFluid flow through openings:

Data Source

PatentUS20220192413A1Coffee press filter

Publication Date: 2022.06.23 LIU XIAOFENG

AI summary

The disclosure discloses a coffee press filter. The coffee press filter includes a filter pressing cylinder body, a filter pressing push rod and a filter pressing bracket, the filter pressing cylinder body is provided with a tubular water injection cavity, one end of the water injection cavity is an open end, the filter pressing bracket is internally provided with an accommodating cavity, the accommodating cavity is internally provided with a filtering cup, the other end, opposite to the open end, of the water injection cavity is integrally provided with a pressing cover, and the pressing cover is provided with a plurality of water outlets. The coffee press filter is integrally combined by this structure, thereby the original five spare and accessory parts are reduced to three spare and accessory parts, and the same function is achieved, a production cost may be reduced, and cleaning is easier after use.