Dishwasher Blower Cover Assembly for Steam Exhaust Water Blocking
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Solution Overview
Problem
In typical dishwashers, washing water can infiltrate into the steam exhaust system, causing short circuits and malfunctions during the washing process.
Innovation Solution
A blower cover assembly with a circular attaching cap, guide sleeve, and guide ribs on the inner circumference is designed to direct splashed washing water to the bottom of the tub, preventing it from entering the steam exhaust system. The guide ribs are inclined to guide the water downward, and a washing water dropping hole directs it back into the tub.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a typical blower cover assembly is used, then the structure is simple, but washing water infiltrates into the steam exhaust system causing electrical malfunctions
Solution Approach 1:
The blower cover assembly is segmented into multiple functional components: a cover body, a guide sleeve with guide ribs, and a draining structure. The guide sleeve is separated as a distinct element that directs water flow away from the steam exhaust system, while the cover body houses the blower motor. This segmentation allows each component to perform its specific function effectively.
Solution Approach 2:
The guide sleeve acts as an intermediary element between the steam exhaust system and the washing water. It intercepts water that would otherwise infiltrate the steam exhaust system and redirects it along the guide ribs to the draining structure, preventing direct contact between water and electrical components.
2Reliability
If the steam outlet shape is improved to direct water downward, then water infiltration is prevented, but the manufacturing complexity increases
Solution Approach 1:
The guide ribs within the guide sleeve are designed with specific geometric parameters - inclined surfaces angled to direct water downward, and curved surfaces that follow the water flow path. These parameter optimizations enable effective water redirection while maintaining compatibility with standard manufacturing processes for plastic or metal components.
3Ease of operation
If a guide structure with ribs is added, then water flow is directed properly, but the device complexity increases
Solution Approach 1:
The guide sleeve combining guide ribs and draining structure is merged with the cover body to form an integrated blower cover assembly. This merging reduces the number of separate components and assembly steps while maintaining the water guidance and drainage functions. The guide ribs are integrated into the sleeve structure rather than being separate elements.
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 effectively prevents water infiltration into the steam exhaust system, thereby preventing electrical malfunctions and ensuring the reliability of the dishwasher's operation.
Implementation Method 1
a guide rib formed on an inner circumference to guide flow of washing water
Implementation Method 2
The guide ribs are inclined to guide the water downward, and a washing water dropping hole directs it back into the tub
Data Source
AI summary
A blower cover assembly of a dishwasher includes an attaching cap contacting a door liner, a guide sleeve extending frontward from the attaching cap, and a guide rib formed on an inner circumference to guide flow of washing water.