Laundry Dryer Particulate Removal Using Damp-State Anti-Static Phase
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Solution Overview
Problem
Laundry appliances face challenges in effectively preventing the accumulation of electrostatic charges during the drying process, which hinders the separation of particulate matter from articles, such as lint and pet hair, leading to inefficient cleaning and potential damage to the appliance.
Innovation Solution
A laundry appliance system that includes a drum, blower, and heater, where a controller coordinates a particulate removal phase by maintaining articles in a damp state using a moisture sensor and fluid delivery system to prevent electrostatic charges, allowing process air to separate particulate matter, followed by conventional drying.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If articles are dried using conventional high-heat drying, then drying efficiency is improved, but electrostatic charge accumulates preventing particulate matter separation
Solution Approach 1:
The system performs a preliminary anti-static treatment before the main drying operation. A water spray system is activated during the initial phase of the drying cycle to saturate articles and prevent electrostatic charge accumulation, enabling effective particulate removal before conventional high-heat drying begins.
Solution Approach 2:
The water spray system operates periodically during the drying cycle rather than continuously. The controller activates the spray at specific intervals to maintain optimal moisture levels for electrostatic prevention while allowing the drying process to proceed efficiently between spray cycles.
2Object-generated harmful factors
If articles are maintained in damp state for particulate removal, then electrostatic charge is prevented and particulate separation is enabled, but drying time is extended
Solution Approach 1:
The system performs a preliminary anti-static treatment before the main drying operation. A water spray system is activated during the initial phase of the drying cycle to saturate articles and prevent electrostatic charge accumulation, enabling effective particulate removal before conventional high-heat drying begins.
Solution Approach 2:
The water spray system operates periodically during the drying cycle rather than continuously. The controller activates the spray at specific intervals to maintain optimal moisture levels for electrostatic prevention while allowing the drying process to proceed efficiently between spray cycles.
3Object-generated harmful factors
If water spray system is used to maintain moisture, then electrostatic charge is prevented, but system complexity increases
Solution Approach 1:
The water spray system serves multiple functions: it prevents electrostatic charge accumulation, facilitates particulate matter separation, and prepares articles for subsequent drying phases. This multi-functionality justifies the added system complexity by eliminating the need for separate anti-static treatment equipment.
Solution Approach 2:
The system uses the existing water supply infrastructure and integrates the spray system with the current drying cycle control logic. The controller automatically manages spray activation based on cycle phase, requiring minimal additional control complexity while achieving effective electrostatic prevention.
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 system effectively prevents electrostatic charge accumulation, allowing for efficient separation and removal of particulate matter, improving cleaning efficiency and appliance performance.
Implementation Method 1
A heater is in thermal communication with the airflow path. The heater operates to deliver thermal energy to the process air.
Implementation Method 2
A blower delivers process air through an airflow path that includes the processing space.
Implementation Method 3
The damp state of the articles prevents accumulation of an electrostatic charge within the articles and a surface of the drum
Data Source
AI summary
A laundry appliance includes a drum that defines a processing space for drying articles. A blower delivers process air through an airflow path that includes the processing space. A heater is in thermal communication with the airflow path and delivers thermal energy to the process air. A controller is in communication with the drum, the blower, and the heater. During operation of a laundry cycle, the heater, the drum, and the blower cooperatively operate a particulate removal phase that maintains the articles in a damp state for a predetermined period of time. The damp state of the articles prevents accumulation of an electrostatic charge within the articles and a surface of the drum and allows the process air to separate particulate matter from the articles. After completion of the particulate removal phase, the heater operates at a conventional state that operates to dry the articles.