Centrifugal Valve Plug for Self-Draining Washing Machine Inner Drum

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Solution Overview

Problem

Existing washing machines with sleeved inner and outer drums face issues of dirt accumulation, reduced washing efficiency, and limited capacity due to the space between the drums, and require effective water drainage and dehydration structures.

Innovation Solution

A sealing valve plug structure with a valve plug column and counterweight, activated by centrifugal force, is integrated into the inner drum to automatically open and close the drain opening, allowing for efficient drainage and dehydration without an outer drum, enhancing washing machine capacity and cleanliness.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If an outer drum is added to accommodate water, then washing function is improved, but device complexity and difficulty of cleaning increase

Engineering Contradiction:
Improvewashing functionVSAvoidstructure complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent removes the outer drum from the washing machine structure, extracting the water accommodation function from a separate component and integrating it directly into the inner drum. This simplifies the overall structure while maintaining the washing function, as the inner drum itself becomes water-tight and can hold water without an outer drum enclosure.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The patent merges the water accommodation function with the inner drum by making it water-tight. Instead of having separate inner and outer drums, the inner drum is designed to directly contain water and perform both washing and dehydration functions, combining multiple functions into a single integrated structure.

Inventive Principle:
Principle #5Merging (Combining)

2Productivity

If the inner drum is enlarged to expand washing capacity, then productivity is improved, but device complexity increases without an outer drum

Engineering Contradiction:
Improvewashing capacityVSAvoidstructure complexity
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The patent combines washing and dehydration functions into a single inner drum structure. The inner drum is designed with specific geometric features (conical bottom, curved surface) that enable it to perform both washing at lower speeds and dehydration at higher speeds, eliminating the need for a separate outer drum and allowing for larger capacity.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The patent uses dynamic operation modes where the inner drum rotates at different speeds for different functions. At low rotation speeds, water flows along the drum surface for washing; at high rotation speeds, centrifugal force pushes water through holes for dehydration. This dynamic adaptability allows one structure to perform multiple functions.

Inventive Principle:
Principle #15Dynamics

3Adaptability or versatility

If water dehydrating holes are added to the inner drum, then dehydration function is improved, but water leakage and contamination problems worsen

Engineering Contradiction:
Improvedehydration functionVSAvoidwater leakage
Core Design Contradiction:
Adaptability or versatilityVSObject-generated harmful factors

Solution Approach 1:

The patent employs dynamic control of the dehydration holes through centrifugal force. At low rotation speeds during washing, the holes remain closed or water flow is controlled. At high rotation speeds during dehydration, centrifugal force opens the holes or directs water flow outward. This dynamic behavior prevents water leakage during washing while enabling effective dehydration.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent applies different functional characteristics to different parts of the inner drum. The upper portion has a smooth curved surface for water flow during washing, while the lower conical portion contains dehydration holes. This local differentiation allows the drum to perform washing and dehydration functions in distinct zones, preventing contamination.

Inventive Principle:
Principle #3Local quality

4Object-affected harmful factors

If the inner drum is made closed to avoid dirt accumulation, then cleanliness is improved, but water drainage and dehydration become more difficult

Engineering Contradiction:
Improvedirt accumulationVSAvoidwater drainage
Core Design Contradiction:
Object-affected harmful factorsVSEase of operation

Solution Approach 1:

The patent uses dynamic operation to control water drainage in a closed drum structure. During washing, the drum rotates at low speed and water remains contained. During dehydration, the drum rotates at high speed and centrifugal force naturally opens drainage pathways through controlled holes or mechanisms, enabling water removal without compromising the closed structure's cleanliness benefits.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent maintains the closed drum structure continuously for cleanliness while integrating drainage functionality that activates only when needed. The closed structure prevents dirt accumulation during normal operation, and drainage is achieved through continuous rotation at appropriate speeds that naturally facilitate water removal through integrated holes or mechanisms.

Inventive Principle:
Principle #20Continuity of useful action

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 solution provides a cleaning-free washing machine with improved efficiency and capacity by using centrifugal force to control the valve plug, ensuring effective drainage and preventing contamination, thus enhancing washing machine performance and cleanliness.

Implementation Method 1

A valve plug structure of a sealing valve includes a valve plug column corresponding to the drain opening formed in the side wall of the inner drum, and a counterweight hinged to the upper end of the valve plug column... When the inner drum rotates at a high speed, the valve plug of the sealing valve moves along a radial center direction of the inner drum under the action of centrifugal force to open the drain opening

Methodology Applied
Scientific EffectCentrifugal force: Centrifugal Force

Implementation Method 2

the reset spring is clamped between the sealing valve installation structure and the valve plug column... the valve plug column can be reset by the reset spring to make the valve plug correspondingly block the drain opening

Methodology Applied
Scientific EffectElasticity: Elasticity

Data Source

PatentUS11680357B2Valve plug structure of sealing valve and cleaning-free washing machine
Publication Date: 2023.06.20 QINGDAO HAIER WASHING MASCH CO LTD
  • US11680357B2 patent drawing
  • US11680357B2 patent drawing
  • US11680357B2 patent drawing

AI summary

A sealing valve plug structure includes a valve plug column corresponding to the drain opening formed in the side wall of an inner drum, and a counterweight hinged to the upper end of the valve plug column. The sealing valve installation structure is installed on the side wall of the drum, and the reset spring is clamped between the sealing valve installation structure and the valve plug column. The counterweight is used to generate an action, under the action of centrifugal force, to open the drain opening, and the valve plug column is reset by the reset spring to make the valve plug block the drain opening, to thereby open and close the drain opening. A cleaning-free washing machine having an inner drum sealed by the sealing valve plug structure is also disclosed.