Replenishment control method of a multi-drum washing machine

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Solution Overview

Problem

Multi-drum washing machines face challenges in optimizing water inlet control, leading to insufficient water supply during the washing process, which can result in reduced washing efficiency and increased energy consumption due to dry burning risks and inefficient water usage.

Innovation Solution

A replenishment control method for multi-drum washing machines that prioritizes water replenishment between drums, ensuring that the drum with a lower water level receives water first, and uses sensors to monitor water levels and prevent simultaneous water supply and replenishment processes, allowing for efficient water reuse and quality testing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If water replenishment is executed for both drums simultaneously when water levels are low, then water supply demand is met, but water inlet time extends and heating process cannot be executed stably

Engineering Contradiction:
Improvewater supply amountVSAvoidwater inlet time
Core Design Contradiction:
Quantity of substanceVSLoss of time

Solution Approach 1:

The control method determines whether the other drum is executing water replenishment before allowing water replenishment for each drum. This preliminary check prevents simultaneous water replenishment operations, ensuring that water inlet completes within the required time frame while still meeting the water supply demands of both drums through sequential operation

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The system implements periodic checking of water levels and conditional water replenishment operations. By alternating water replenishment between drums based on detection results and operational status, the system ensures adequate water supply while maintaining efficient time management for the heating process

Inventive Principle:
Principle #19Periodic action

2Loss of substance

If theoretical water inflow is limited, then water usage is controlled, but water demand during washing is insufficient leading to dry burning risk

Engineering Contradiction:
Improvewater usageVSAvoidheating process stability
Core Design Contradiction:
Loss of substanceVSReliability

Solution Approach 1:

The control method continuously detects water levels in each drum and uses this feedback information to determine when water replenishment is needed. This feedback mechanism ensures that water inflow is optimized to meet actual washing demands while preventing dry burning conditions, thereby maintaining both water efficiency and heating process reliability

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The system dynamically adjusts water replenishment operations based on real-time conditions. By conditionally executing water replenishment only when the other drum is not replenishing water, the system adapts water supply timing to actual operational needs, preventing both water waste and insufficient water conditions that could cause dry burning

Inventive Principle:
Principle #15Dynamics

Data Source

PatentUS10947656B2Replenishment control method of a multi-drum washing machine
Publication Date: 2021.03.16 QINGDAO HAIER DRUM WASHING MACHINE CO LTD
  • US10947656B2 patent drawing
  • US10947656B2 patent drawing
  • US10947656B2 patent drawing

AI summary

A water replenishment control method for a multi-drum washing machine. The washing machine comprises at least a first washing drum and a second washing drum. While the first washing drum is in a washing process, if the water level of washing water is lower than a set value, then a water replenishment process is executed, and before that, it is necessary to determine whether or not the second washing drum is executing a water replenishment process; if yes, the first washing drum pauses the water replenishment process, and the second washing drum executes precedence preferentially; if no, the first washing drum executes water replenishment process and terminates it when the water level of the washing water reaches a set water level.