Method for operating a laundry washing machine using a unit dose package and laundry washing machine
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Solution Overview
Problem
The use of unit dose detergent pods in laundry washing machines can result in residual undissolved detergent causing spots or stains, inefficient rinsing, and unpredictable detergent release, leading to incomplete washing cycles and potential allergic reactions due to residual detergent.
Innovation Solution
A laundry washing machine with a control unit that manages water temperature and supply to ensure proper dissolution of detergent pods, using a compartment to hold the pod until it dissolves and then releasing the detergent into the wash water, and optionally using water jets to break the pod's pouch for uniform distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a unit dose detergent pod is inserted directly into the drum with laundry, then the detergent is convenient to use and pre-measured, but the pod may remain trapped in the middle of the load causing residual undissolved detergent and stains
Solution Approach 1:
The invention divides the washing process into distinct phases: a preliminary washing phase where the pod is introduced and dissolved, and a subsequent rinsing phase. This segmentation ensures the pod is broken down and distributed before main washing, preventing residual undissolved detergent from causing stains while maintaining the convenience of pre-measured pods.
Solution Approach 2:
The pod is introduced and dissolved during a preliminary washing phase before the main washing cycle. Water is supplied to the drum at the beginning of this preliminary phase to facilitate pod dissolution and distribution, ensuring the detergent is fully activated before contacting the laundry load, thus preventing residual stains.
2Manufacturing precision
If the pod is allowed to break down before the washing cycle begins, then the detergent can be distributed evenly, but the detergent may fall to the bottom of the tub and be drained away during the initial draining phase
Solution Approach 1:
The washing machine operates with periodic phase transitions: a preliminary washing phase where the pod dissolves and distributes, followed by a main washing phase. The pod is intentionally kept intact until the preliminary phase begins, then dissolves at the optimal moment, ensuring uniform distribution without loss during subsequent draining phases.
Solution Approach 2:
The preliminary washing phase acts as an intermediary stage between pod insertion and main washing. During this phase, water is supplied to facilitate controlled pod dissolution and distribution, serving as a mediator that ensures uniform detergent distribution while preventing premature breakdown and loss during initial draining.
3Object-affected harmful factors
If the washing cycle starts with a draining phase for safety and hygiene, then contaminants are removed, but any detergent that has fallen to the bottom of the tub is drained away, potentially leaving the cycle without detergent
Solution Approach 1:
The pod dissolution and distribution is performed as a preliminary action during the preliminary washing phase, which occurs after the initial draining phase. This timing ensures the detergent is activated and distributed throughout the drum before any draining occurs during the main washing cycle, guaranteeing detergent availability while maintaining the safety and hygiene benefits of initial draining.
Solution Approach 2:
The washing cycle uses periodic phase transitions where the preliminary washing phase (with pod dissolution) follows the initial draining phase. This periodic structure ensures contaminants are removed during draining while detergent is introduced and distributed in the subsequent preliminary washing phase, resolving the conflict between contaminant removal and detergent availability.
4Adaptability or versatility
If the pod dissolves at an unpredictable time, then the detergent release timing varies, but this indeterminateness negatively affects the performance and efficiency of the washing cycle
Solution Approach 1:
The control unit monitors the washing cycle progress and triggers water supply at a specific point in the preliminary washing phase to initiate pod dissolution. This feedback-controlled timing ensures the pod dissolves at the optimal moment for maximum washing efficiency, eliminating the unpredictability of natural dissolution while maintaining the flexibility of pod-based operation.
Solution Approach 2:
The washing machine employs periodic phase transitions with the preliminary washing phase specifically designed to trigger pod dissolution at a predetermined point. This periodic structure provides consistent, predictable timing for detergent release, optimizing washing cycle efficiency while preserving the adaptability of using pre-measured pods.
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 ensures complete detergent utilization, prevents residual detergent issues, and provides predictable washing cycles with improved rinsing efficiency, reducing the risk of stains and allergic reactions.
Implementation Method 1
a pre-measured amount of treating agent incorporated into a water-soluble pouch
Implementation Method 2
using water jets to break the pod's pouch for uniform distribution
Data Source
AI summary
A laundry washing machine and a method for operating the washing machine offer ways to load a unit dose package into a compartment of the washing machine. A control unit controls the washing machine to add water to a compartment having a unit dose package. The tub is then filled with hot or cold water depending on the temperature of the water in the tub, or whether a sanitizing cycle of a washing program has been selected.