Real-Time Load Size Detection for Laundry Fill Indicator Control

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Solution Overview

Problem

Users often face suboptimal laundry treatment performance due to inaccurate estimation of laundry load size in washing machines, either by manual input or automatic detection, leading to overfilling or underfilling, which affects cleaning efficiency and resource usage.

Innovation Solution

A laundry treating appliance equipped with sensors to measure load size and a processor that controls a laundry fill indicator to display optimal, underfilled, or overfilled conditions, allowing users to adjust the load accordingly for optimal cycle selection and performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If manual input or automatic detection is used to determine load size, then the treating performance is improved, but the accuracy of load size determination deteriorates leading to overfilling or underfilling

Engineering Contradiction:
Improvetreating performanceVSAvoidload size determination accuracy
Core Design Contradiction:
ReliabilityVSMeasurement precision

Solution Approach 1:

The patent implements a feedback mechanism where the processor continuously monitors load size during the loading phase and provides real-time visual feedback through the laundry fill indicator. This allows users to adjust the load to achieve optimal fill levels, resolving the contradiction by enabling accurate load size determination through continuous monitoring and feedback rather than relying on inaccurate manual input or single-point automatic detection.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The system performs preliminary determination of load size during the loading phase before the treating cycle begins. The processor calculates load size based on sensor data collected during loading, and the fill indicator provides advance information to users about whether the load is optimal, underfilled, or overfilled. This preliminary action allows users to correct loading issues before they affect treating performance.

Inventive Principle:
Principle #10Preliminary action

2Ease of operation

If the laundry fill indicator is controlled to indicate load status, then the user experience is improved, but the device complexity increases

Engineering Contradiction:
Improveuser experienceVSAvoiddevice complexity
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The laundry fill indicator uses color changes to communicate load status to users. Different colors represent different load conditions (e.g., green for optimal, yellow for underfilled, red for overfilled). This simple visual communication method improves user experience without requiring complex interfaces or controls, resolving the contradiction by providing intuitive feedback through basic color indicators rather than complex displays.

Inventive Principle:
Principle #32Color changes

Solution Approach 2:

The system automatically determines load size using sensors and processor calculations, then automatically controls the fill indicator to display the appropriate status. This self-service approach eliminates the need for manual user input while providing comprehensive feedback, improving ease of operation without requiring complex user interactions. The system serves itself by automatically monitoring and communicating load status.

Inventive Principle:
Principle #25Self-service

Data Source

PatentUS11572648B2Method for real time determination during loading of volumetric load size in a laundry treating appliance
Publication Date: 2023.02.07 WHIRLPOOL CORP
  • US11572648B2 patent drawing
  • US11572648B2 patent drawing
  • US11572648B2 patent drawing

AI summary

A method of operating and a laundry treating appliance, including a rotatable drum at least partially defining a treating chamber into which laundry may be placed for treatment according to a cycle of operation, a processor programmed to at least as the laundry is being placed in the treating chamber, at least one of measure, sense, analytically determine, estimate, or receive as an input used to determined a load size. A laundry fill indicator indicates information related to the determined load size.