Rinsing Flow Element Geometry for Complete Heat Exchanger Lint Cleaning
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Solution Overview
Problem
Existing cleaning devices for household tumble dryers often fail to regularly distribute rinsing fluid to components loaded with lint, leading to incomplete removal of lint from heat exchangers.
Innovation Solution
A cleaning device with a rinsing unit featuring a flow element that generates dynamic pressure, configured as an elongated part with a narrow point and a slot-like opening, ensures regular fluid distribution and efficient lint removal by creating a dynamic pressure and adequate flow speed across the component.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional rinsing unit is used without a flow element, then the device complexity is low, but the rinsing fluid is not distributed regularly on the component leading to incomplete lint removal
Solution Approach 1:
The flow element segments the rinsing fluid flow into multiple streams through its elongated structure with multiple openings, ensuring regular distribution across the component surface. This segmentation of fluid flow directly addresses the inconsistency in lint removal by providing uniform coverage.
Solution Approach 2:
The flow element acts as an intermediary device between the rinsing fluid source and the component. It mediates the fluid delivery by shaping and directing the flow to achieve regular distribution, thereby improving lint removal effectiveness without requiring complex control systems.
2Productivity
If the flow element has a narrow point constriction, then the dynamic pressure and flow speed are improved for better lint removal, but the manufacturing precision requirements increase
Solution Approach 1:
The flow element utilizes parameter changes in its geometry, specifically the narrow point constriction that transitions from a larger cross-section to a smaller cross-section and back. This geometric parameter change naturally generates the required dynamic pressure and flow speed variations to improve lint removal efficiency.
Solution Approach 2:
The flow element incorporates a localized narrow point constriction rather than uniform geometry throughout. This local quality change creates the necessary pressure differential and flow acceleration precisely where needed, achieving improved lint removal without requiring high precision throughout the entire component.
3Reliability
If rinsing fluid is applied irregularly to the component, then the device complexity remains low, but the lint continues to remain deposited on parts of the component
Solution Approach 1:
The flow element segments the fluid delivery system into multiple openings along its elongated structure, ensuring that rinsing fluid is distributed regularly across different areas of the component. This segmentation approach achieves complete cleaning coverage without requiring a complex multi-component system.
Solution Approach 2:
The elongated flow element with multiple openings ensures continuous and regular application of rinsing fluid across the component surface. This continuous useful action prevents lint from remaining deposited on any parts of the component, achieving complete cleaning reliability.
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 enables regular and efficient removal of lint from heat exchangers by ensuring consistent fluid application and flow speed, improving the effectiveness of lint removal in household appliances.
Implementation Method 1
configured to build up a dynamic pressure of the rinsing fluid in the flow element
Implementation Method 2
allows a flow speed to be achieved that is adequate to rinse out the lint
Data Source
AI summary
A cleaning device for a component loaded with lint in a household appliance for laundry care. The cleaning device includes a rinsing unit to guide rinsing fluid to the component to remove the lint. The rinsing unit has a flow element disposed above the component, and the flow element builds up a dynamic pressure of the rinsing fluid in the flow element.