Additive dispenser for varying the types of additives within a washing machine appliance
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Solution Overview
Problem
Existing washing machine additive dispensers face challenges in ensuring complete dissolution of additive pods, especially during cold-water wash cycles, leading to potential damage or staining of articles and wastefulness due to undissolved remnants.
Innovation Solution
A washing machine appliance with a fluid additive dispenser featuring a housing and dispenser drawer that includes a primary compartment, a pod compartment, and a pod outlet, where the pod compartment is designed with internal walls to facilitate the dissolution of additive pods by directing water flow effectively, and an optical sensor to monitor pod status for optimal water usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If additive pods are used in cold-water wash cycles, then convenience and premeasured dosing are improved, but dissolution completeness deteriorates leading to remnants and waste
Solution Approach 1:
The system performs preliminary action by detecting the presence and type of additive pod before the wash cycle begins, then pre-heating water and directing it to the pod compartment during the cycle to ensure complete dissolution. The optical sensor detects pod characteristics in advance, allowing the control system to prepare appropriate dissolution conditions.
Solution Approach 2:
The system changes physical parameters by heating water to specific temperatures and controlling water flow rate to the pod compartment based on detected pod characteristics. The control system adjusts water temperature and flow parameters dynamically to optimize dissolution conditions for different pod types while preventing remnant formation.
2Adaptability or versatility
If multiple types of additive pods are used, then versatility is improved, but difficulty in ensuring complete dissolution and proper detection worsens
Solution Approach 1:
The system implements feedback by using an optical sensor to continuously detect pod characteristics and dissolution status, then adjusting water flow and temperature accordingly. The sensor provides real-time information about pod presence and dissolution progress, allowing the control system to make corrective adjustments to ensure complete dissolution of any pod type.
Solution Approach 2:
The system achieves universality by designing a multi-functional detection and dispensing mechanism that can handle various pod types (different sizes, shapes, and compositions) through a single optical detection system and water delivery mechanism. The pod compartment and water flow system are designed to accommodate diverse pod characteristics while maintaining effective dissolution.
3Ease of operation
If additive pods are deposited directly into the wash basket, then ease of operation is improved, but harmful effects worsen due to potential damage or staining of articles
Solution Approach 1:
The system introduces an intermediary mechanism - a dedicated pod compartment with controlled water delivery - that acts as a mediator between the additive pod and the wash basket. Water is delivered directly to the pod in the compartment, ensuring complete dissolution before the additive enters the wash basket, thus preventing direct contact between undissolved pod material and articles.
Solution Approach 2:
The system replaces the simple mechanical action of dropping pods into the basket with a controlled water delivery system that uses fluid dynamics to dissolve pods completely. Instead of relying on mechanical agitation in the basket, the system uses directed water flow and temperature control in the pod compartment to ensure complete dissolution before additive release.
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 ensures improved dissolution of additive pods during wash cycles, preventing damage and wastage by ensuring complete use of wash additives, and allowing for the use of multiple types of pods while maintaining efficient operation.
Implementation Method 1
an optical sensor to monitor pod status for optimal water usage
Implementation Method 2
designed with internal walls to facilitate the dissolution of additive pods by directing water flow effectively
Data Source
AI summary
A washing machine appliance, as provided herein, may include a cabinet, a tub, a basket, and a fluid additive dispenser. The fluid additive dispenser may include a housing and a dispenser drawer. The housing may extend between an open front end and a closed rear end. The housing may be disposed within the cabinet. The dispenser drawer may be selectively received in the housing above the basket. The dispenser drawer may extend from a forward end proximate to the rotation axis to a rearward end distal to the rotation axis. The dispenser drawer may define a primary compartment and a pod compartment adjacent to the primary compartment between the forward end and the rearward end. The dispenser drawer may further define a pod outlet extending through a wall of the pod compartment to direct a wash fluid therefrom.