Nested Filter Unit for Compact Water Treatment

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Solution Overview

Problem

Existing water treatment apparatuses with staged filter units occupy large space and have low water flux, causing inconvenience and failing to meet user water demands.

Innovation Solution

A combined filter unit with a nested design, where a second filter assembly is placed inside a first filter assembly, utilizing the space efficiently by accommodating two filter tubes in the space originally meant for one, and including a housing with specific water inlets and outlets for enhanced filtration and space-saving.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple staged filter units are used for water treatment, then filtering efficiency is improved, but the occupied space increases

Engineering Contradiction:
Improvefiltering efficiencyVSAvoidoccupied space
Core Design Contradiction:
ReliabilityVSVolume of stationary object

Solution Approach 1:

The patent applies nesting by placing the second filter assembly inside the internal tube of the first filter assembly. The internal tube serves as a container for the second filter assembly, allowing two filter units to occupy the space of one. This nested configuration maintains multi-stage filtration efficiency while significantly reducing the overall occupied space of the water treatment apparatus.

Inventive Principle:
Principle #7Nested doll (Nesting)

2Reliability

If multiple staged filter units are used for water treatment, then filtering efficiency is improved, but the water flux decreases

Engineering Contradiction:
Improvefiltering efficiencyVSAvoidwater flux
Core Design Contradiction:
ReliabilityVSProductivity

Solution Approach 1:

The patent transitions from a sequential linear arrangement of filter units to a nested spatial configuration. By arranging the second filter assembly within the internal tube of the first filter assembly, water can flow through both filters simultaneously or in parallel paths, effectively increasing water flux while maintaining multi-stage filtration efficiency.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

3Ease of manufacture

If traditional filter assembly arrangement is used, then ease of manufacture is maintained, but space utilization is poor

Engineering Contradiction:
Improvemanufacturing simplicityVSAvoidspace utilization
Core Design Contradiction:
Ease of manufactureVSVolume of stationary object

Solution Approach 1:

The patent implements nesting by configuring the second filter assembly within the internal tube of the first filter assembly. This approach maintains manufacturing simplicity as each filter assembly can be manufactured independently using conventional methods, while the nested arrangement optimizes space utilization by accommodating two filter units in the space traditionally occupied by one.

Inventive Principle:
Principle #7Nested doll (Nesting)

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 combined filter unit achieves a compact structure, reducing overall volume and improving filtering efficiency while saving space, making it more convenient for users.

Implementation Method 1

a first filter assembly provided in the housing, and defining a filter material installation cavity therein; an internal tube provided in the filter material installation cavity; and a second filter assembly provided in the internal tube

Methodology Applied
Scientific EffectPhysical filtration: Filter (physical)

Data Source

PatentUS11851351B2Combined filter unit and water treatment apparatus having same
Publication Date: 2023.12.26 FOSHAN SHUNDE MIDEA WATER DISPENSER MFG
  • US11851351B2 patent drawing
  • US11851351B2 patent drawing
  • US11851351B2 patent drawing

AI summary

A combined filter unit and a water treatment apparatus having the same. The combined filter unit comprises a housing, a first filter assembly, an internal tube, and a second filter assembly. The first filter assembly is provided in the housing, and defines a filter material installation cavity therein. The internal tube is provided in the filter material installation cavity. The second filter assembly is provided in the internal tube.