Gravity-Fed Detergent Dosing With Diverter Valve Control
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Solution Overview
Problem
Existing washing machines require users to manually fill and manage single-use detergent dispensing systems, which can be tedious and prone to errors, while bulk dispensing systems are less common due to increased costs associated with pumps and sensors.
Innovation Solution
A washing machine design incorporating a detergent storage tank, diverter valve with a solenoid, flow meter, and user interface that uses gravity to precisely dose detergent, eliminating the need for pumps and sensors by allowing users to input desired detergent amounts and automatically control the dispensing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If single use dispensing systems are used, then ease of operation is improved, but reliability deteriorates due to user errors in filling and managing detergent
Solution Approach 1:
The system automatically dispenses detergent without requiring user intervention to fill or manage single-use containers. The bulk storage system with automated dispensing controls eliminates the need for users to manually fill dispensing cups, thereby maintaining ease of operation while improving reliability by removing human error from the process.
2Reliability
If bulk dispensing systems are used, then reliability is improved, but device complexity worsens due to pumps and sensors
Solution Approach 1:
The invention extracts and removes the complex pump and sensor subsystems from traditional bulk dispensing systems. Instead, it uses a simplified mechanism relying on gravity-fed detergent flow from a bulk storage tank, controlled by a basic diverter valve and monitored by a simple flow meter, thereby maintaining reliability while significantly reducing device complexity.
Solution Approach 2:
The patent replaces complex mechanical pump systems with a gravity-based passive flow system. The detergent flows automatically from the bulk storage tank through gravity alone, eliminating the need for powered pumps and complex control sensors, thus reducing device complexity while maintaining reliable dosing.
3Manufacturing precision
If bulk dispensing systems with pumps and sensors are used, then manufacturing precision is improved, but cost worsens
Solution Approach 1:
The invention uses inexpensive, simple components such as a basic diverter valve and a straightforward flow meter instead of expensive precision pumps and sensors. The system achieves adequate dosing precision through these low-cost components combined with gravity-fed flow, significantly reducing manufacturing cost while maintaining sufficient dosing accuracy.
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 solution simplifies the detergent dosing process, reduces user error, and lowers costs by utilizing gravity to dispense detergent accurately and efficiently, making it more convenient and cost-effective than traditional bulk dispensing systems.
Implementation Method 1
uses gravity to feed detergent through the detergent inlet and the flow meter to precisely dose the detergent into the machine
Data Source
AI summary
An appliance for washing clothes includes a detergent storage tank and a drum. Between the detergent storage tank and the drum is a diverter valve which has a detergent inlet connected to the detergent storage tank, an air vent connected to ambient air, and a detergent outlet. The diverter valve has an energized state wherein the detergent inlet is open and the air vent is closed, and a de-energized state wherein the detergent inlet is closed and the air vent is open. The appliance also has a flow meter connected to the diverter valve and the drum.