Dishwasher Vane and Rail Assembly for Uniform Spray Coverage
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Solution Overview
Problem
Conventional dishwashers with rotating spray nozzles often create dead zones where washing water is not effectively sprayed, while linear-type injection structures with fixed nozzles suffer from increased pressure loss and localized washing.
Innovation Solution
A dishwasher design incorporating a rotational vane that moves within the washing tub, guided by a rail assembly, to control the direction of washing water sprayed from fixed nozzles, ensuring uniform coverage and minimizing dead zones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If rotating spray nozzles are used, then the washing water can be sprayed to a larger area, but dead zones where washing water is not effectively sprayed still occur
Solution Approach 1:
The patent employs a vane that performs reciprocating motion (moving back and forth) within the washing tub. This dynamic movement allows the vane to redirect washing water to different regions over time, ensuring that all areas including previously dead zones receive effective washing coverage.
Solution Approach 2:
The vane acts as an intermediary element between the fixed spray nozzles and the dishes. It receives washing water from the nozzles and redirects it toward dishes in regions that would otherwise be dead zones, thereby mediating the water distribution to eliminate coverage gaps.
2Reliability
If fixed nozzles are used in linear-type injection structure, then dead zones are prevented, but pressure loss of washing water increases
Solution Approach 1:
The patent extracts the directional control function from the nozzles themselves and places it in a separate movable vane. The fixed nozzles only need to provide water in one direction, while the vane handles the redirection, allowing the nozzle structure to remain simple and efficient.
Solution Approach 2:
By making the vane movable rather than fixed, the system achieves uniform washing coverage dynamically over time rather than requiring complex fixed nozzle arrangements. This dynamic approach maintains simpler fixed nozzle structures, reducing pressure loss.
3Device complexity
If fixed nozzles are located adjacent to rear wall, then the outlet of distribution device does not need to face upward, but the channel becomes bent and pressure loss increases
Solution Approach 1:
The vane serves as an intermediary that compensates for the suboptimal nozzle placement. Even though the nozzles are positioned near the rear wall creating bent channels, the vane's reciprocating motion redirects the water flow to ensure proper coverage, making the bent channel arrangement acceptable.
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 rotational vane design allows for controlled and uniform spraying of washing water, preventing dead zones and improving washing efficiency by ensuring all areas of the tub are effectively cleaned.
Implementation Method 1
a vane configured to reflect the washing water sprayed via the fixed nozzle toward dishes while being moved within the washing tub
Data Source
AI summary
Disclosed is a dishwasher having a structure improved to enhance the efficiency of washing. The dishwasher includes a main body, a washing tub provided in the main body, a door configured to close or open an open side of the washing tub, a fixed nozzle fixed on another side of the washing tub and configured to spray washing water, a vane configured to reflect the washing water sprayed via the fixed nozzle toward dishes while being moved within the washing tub, and a rail assembly configured to guide the movement of the vane. The vane is rotationally coupled to the rail assembly to change a direction of movement of the washing water sprayed via the fixed nozzle.