Dishwasher Stationary Nozzles With Rotatable Vanes for Full Wash Coverage
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Solution Overview
Problem
Conventional dish washing machines with rotating spray nozzles create dead regions where washing water is not sprayed, while linear type spray structures with stationary nozzles face pressure loss issues due to bent outlet connections, leading to inefficient washing.
Innovation Solution
A dish washing machine design featuring stationary nozzles with rotatable vanes that reflect washing water throughout the tub, minimizing dead regions and optimizing water pressure by using a distribution device with outlets facing the rear wall, reducing pressure loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a rotating spray nozzle is used, then the washing water can be sprayed throughout the washing tub, but dead regions where washing water is not sprayed are generated
Solution Approach 1:
The spray system is divided into multiple stationary nozzles positioned at different locations (front wall, rear wall, side walls) rather than using a single rotating nozzle. Each nozzle covers a specific zone, and together they provide complete coverage without dead regions. The vane is also segmented into multiple vanes that can be independently controlled to reflect water to different areas.
Solution Approach 2:
Instead of rotating the nozzle, the system uses movable vanes that can dynamically adjust their positions to reflect washing water to different areas. The vanes are driven by drive devices that can change the reflection direction of water spray in real-time, providing dynamic coverage adjustment without mechanical rotation of the nozzle itself.
2Ease of manufacture
If the outlet of the distribution device is directed upward to connect to a stationary nozzle, then the connection is simplified, but the passage has to be bent rearward immediately causing pressure loss
Solution Approach 1:
The distribution device outlets are specifically oriented to face the rear wall, matching the position and orientation of the stationary nozzles mounted on the rear wall. This local optimization of the outlet direction eliminates the need for bent passages and ensures direct water flow from the distribution device to the nozzles, minimizing pressure loss while simplifying the connection structure.
3Object-affected harmful factors
If a linear type spray structure with stationary nozzles is used, then dead regions are eliminated, but pressure loss increases due to bent outlet connections
Solution Approach 1:
Instead of directing outlets upward and then bending them rearward, the distribution device outlets are inverted to directly face the rear wall. This reverses the conventional connection approach and eliminates the bent passage configuration, thereby reducing pressure loss while maintaining the stationary nozzle arrangement that eliminates dead regions.
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 ensures thorough washing coverage without dead regions and minimizes pressure loss, enhancing washing efficiency and effectiveness.
Implementation Method 1
a vane which reflects washing water sprayed from the stationary spray nozzle toward dishes while moving in the washing tub
Data Source
AI summary
A dish washing machine includes a main body, a washing tub provided in the main body, a basket provided in the washing tub to store a dish, a stationary nozzle fixed to one side of the washing tub to spray washing water, and a plurality of vanes which change a direction of the washing water sprayed from the stationary nozzle toward the basket. At least one of the plurality of vanes are rotatably provided and operate so that the washing water sprayed from the stationary nozzle is reflected toward the basket. Through such a configuration, a dead region in which the dish is not washed may be minimized.