Drum Washing Cycle With Centrifugal Spray Wetting
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Solution Overview
Problem
The drum type laundry treatment apparatus faces challenges in achieving uniform washing performance due to varying wetting of laundry depending on weight, especially when a large amount of laundry is placed, leading to inconsistent washing results.
Innovation Solution
The apparatus incorporates a spray nozzle system that atomizes wash water and sprays it into the drum, combined with controlled drum rotation and water supply management, to ensure uniform wetting and improved washing efficiency, including a squeezing motion to enhance centrifugal force and permeation washing effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a large amount of laundry is placed in the drum, then the washing capacity is improved, but the uniformity of wetting is deteriorated
Solution Approach 1:
The washing process is segmented into multiple phases: initial rotation at first speed to distribute laundry, then acceleration to second speed for centrifugal wetting, followed by water spraying. This segmentation allows each phase to address specific wetting requirements, ensuring uniform coverage even with large laundry loads.
Solution Approach 2:
Before the main washing cycle, the drum rotates at a first speed to preliminarily distribute the laundry and prepare it for uniform wetting. This preliminary action prevents clumping and ensures that subsequent water application reaches all laundry items evenly, regardless of load size.
2Productivity
If the drum rotates at high speed to enhance centrifugal force, then the wetting efficiency is improved, but the laundry position stability is deteriorated
Solution Approach 1:
The drum rotation speed is periodically adjusted between first speed (for stability and distribution) and second speed (for centrifugal wetting efficiency). This periodic action allows the system to alternatingly achieve positional stability and wetting efficiency, with water spraying applied during the high-speed phase to maximize centrifugal wetting effect.
3Manufacturing precision
If water is sprayed into the drum during high-speed rotation, then the wetting uniformity is improved, but the energy consumption is increased
Solution Approach 1:
Water spraying is applied continuously during the high-speed rotation phase to maintain constant wetting action. This continuous application ensures that all laundry surfaces are uniformly wetted while the drum maintains second speed, maximizing the centrifugal force effect on water distribution without interrupting the useful wetting action.
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 approach ensures uniform wetting of laundry across the entire drum, even with large loads, improving washing performance and efficiency by ensuring all laundry is effectively wetted and cleaned.
Implementation Method 1
accelerating the drum to rotate the drum at a second speed, which is faster than the first speed, in a washing cycle or a rinsing cycle such that at least some of the laundry clings to a side of the drum for a full rotation of the drum during the acceleration
Data Source
AI summary
A washing method includes (a) continuously rotating a drum in one direction at a first speed such that laundry is lifted to a predetermined height and then falls, (b) accelerating the drum to rotate the drum at a second speed such that the laundry is moved in a state in which at least some of the laundry clings to the drum, and (c) spraying wash water into the drum during rotation of the drum at the second speed.