Circulating and filtering device of washing machine and washing machine

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Solution Overview

Problem

The filtering assembly in washing machines accumulates threads and debris in its cavity, leading to blockages over time, which affects the performance of the circulating pump and can cause secondary pollution.

Innovation Solution

A rotatable filtering assembly with a blade and inner cavity is integrated into the circulating pump assembly, allowing water to be filtered and preventing impurities from entering the circulating water cavity, while the drainage assembly ensures self-cleaning without disassembly, using a rotating impeller and drainage pump to manage impurities.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a detachable filtering member is disposed in the filtering cavity to filter washing water, then impurities such as threads and debris are prevented from entering the circulating pump assembly, but the filtering assembly is fixedly disposed and impurities accumulate in the filtering cavity causing blockage over time

Engineering Contradiction:

Improveprevention of circulating pump failureVSAvoidfiltration efficiency over time

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The filtering assembly is changed from a fixed structure to a rotatable structure that can rotate along with the circulating pump impeller. This dynamic design allows the filtering assembly to be driven by water flow, enabling automatic cleaning action that prevents impurity accumulation and blockage while maintaining continuous filtration capability.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The rotatable filtering assembly utilizes the water flow itself to drive its rotation, creating a self-cleaning mechanism. The flowing water automatically removes accumulated impurities from the filtering surface without requiring external intervention or disassembly, allowing the system to maintain its own performance over time.

Inventive Principle:

Principle #25Self-service

2Reliability

If a filtering assembly is fixedly disposed in the circulating pump assembly, then washing water can be filtered effectively, but the filtering assembly cannot be cleaned without disassembly when impurities accumulate

Engineering Contradiction:

Improvefiltration functionVSAvoidcleaning convenience

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The filtering assembly rotates continuously during the washing machine operation, ensuring that the filtration surface is constantly being cleaned by the water flow. This continuous action prevents impurity accumulation and maintains filtration efficiency throughout the washing cycle without interruption.

Inventive Principle:

Principle #20Continuity of useful action

3Productivity

If impurities accumulate in the filtering cavity during long-time filtration, then the filtering assembly blocks easily, but making the filtering assembly rotatable adds structural complexity

Engineering Contradiction:

Improvecontinuous filtration capabilityVSAvoidfiltering assembly structure

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The filtering assembly is merged with the circulating pump structure, sharing the same rotational axis and driving mechanism. The filtering assembly rotates together with the pump impeller, eliminating the need for separate drive mechanisms and reducing overall structural complexity while achieving continuous self-cleaning functionality.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The rotatable filtering assembly serves multiple functions: it filters washing water, prevents pump blockage, and cleans itself through rotation. This multi-functionality is achieved within a single integrated structure that leverages the existing water flow and pump rotation, avoiding the need for additional independent systems.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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

This design prevents blockages in the filtering assembly, maintains the performance of the circulating pump, and allows for effective self-cleaning of the washing machine, ensuring continuous water recycling and reducing pollution.

Implementation Method 1

a blade is disposed on an outer wall of the filtering assembly... so that water in the intake water cavity is filtered by the filtering assembly

Methodology Applied

Scientific EffectFluid flow:

Data Source

PatentEP3730688B1Circulating and filtering device of washing machine and washing machine

Publication Date: 2023.06.07 QINGDAO JIAONAN HAIER WASHING MACHINE CO LTD

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AI summary

Provided is a circulating and filtering device of a washing machine, including a circulating pump assembly, where the circulating pump assembly includes an intake water cavity and a circulating water cavity that is in communication with the intake water cavity; and a filtering assembly disposed in the intake water cavity and rotatably connected to the circulating pump assembly, where the filtering assembly includes a blade and an inner cavity, where the inner cavity is in communication with the circulating water cavity, so that water in the intake water cavity is filtered by the filtering assembly and enters the circulating water cavity.