Dishwasher Jet Nozzle Passage for Low-Loss Divided Washing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Dishwashers with rotary jet nozzles have areas that are not effectively washed due to their rotational radius limitations, while linear type jet structures with fixed nozzles face increased pressure loss if the distribution device's outlet is positioned upward, and lack the ability for divided washing operations.
Innovation Solution
A dishwasher with a jet nozzle having a passage with intersecting circle outlines and protrusions that guide and jet washing water, featuring a cross-sectional area that widens downstream, and a manufacturing method using cores with different diameters to form the nozzle, allowing for improved straightness and durability of the washing water jet.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the distribution device outlet is disposed upward for fixed nozzles, then the passage can be simplified, but the pressure loss of washing water increases due to bending from outlet toward rear side
Solution Approach 1:
Instead of positioning the distribution device outlet upward and bending the passage rearward, the patent inverts the approach by positioning the outlet directly at the rear side, allowing the passage to extend straight to the fixed nozzles without bending, thereby reducing pressure loss while maintaining structural simplicity
2Area of stationary object
If rotary nozzles are used, then the washing water can be jetted to a range within rotational radius, but areas outside this range are not effectively washed
Solution Approach 1:
The patent divides the washing system into multiple fixed nozzles arranged in left and right directions, each nozzle contributing to different areas of the washing tub. This segmentation allows complete coverage of the washing area without relying on rotational movement, ensuring uniform washing across all zones
3Device complexity
If fixed nozzles are used with outlet disposed upward, then the structure can be simplified, but the passage must bend toward rear side increasing pressure loss
Solution Approach 1:
The patent inverts the conventional upward outlet positioning by placing the distribution device outlet at the rear side, allowing the passage to extend straight to the fixed nozzles without bending, thereby reducing pressure loss while maintaining structural simplicity
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 enhances the straightness and pressure efficiency of washing water distribution, ensuring all areas are washed effectively and allowing for divided washing operations without increased pressure loss, while improving the durability and manufacturing efficiency of the jet nozzle.
Implementation Method 1
a jet nozzle configured to jet washing water to the washing tub, wherein the jet nozzle includes a plurality of nozzle inner walls provided therein to form a passage through which the washing water passes and having a plurality of passage inner walls provided to have arc shapes in section vertical to a flow direction of the washing water
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A dishwasher including a cabinet configured to form an exterior, a washing tub (803) provided in the cabinet to wash dishes, and a jet nozzle (920) configured to jet washing water to the washing tub (803), wherein the jet nozzle (920) includes a plurality of nozzle inner walls (923) provided therein to form a passage (924) through which the washing water passes and having a plurality of passage inner walls (923a) provided to have arc shapes in section vertical to a flow direction of the washing water. Due to such configuration, a jetting force may be enhanced and washing efficiency may be also improved.