Fixed Nozzle Assembly Ribs to Prevent Dishwasher Clogging
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Solution Overview
Problem
Dish washing machines with fixed nozzle assemblies in a linear jet structure face challenges in minimizing the introduction of foreign substances due to the design of the nozzle assembly, leading to potential clogging and reduced efficiency.
Innovation Solution
The dish washing machine incorporates a guide rib and nozzle support rib in the nozzle assembly to prevent foreign substances from entering the internal space, with a guide rib extending backward on the nozzle front cover and overlapping the nozzle support rib, ensuring that washing water introduced into the inlet flow path is discharged externally, thus minimizing the introduction of contaminants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the nozzle front cover is combined directly with the nozzle body without additional protective structures, then the device complexity is reduced, but foreign substances can be introduced into the combining portion leading to clogging
Solution Approach 1:
A guide rib is introduced as an intermediary element between the nozzle front cover and nozzle body. The guide rib extends backward on the nozzle front cover and overlaps the nozzle support rib, creating a protective barrier that prevents foreign substances from entering the combining portion while maintaining the functional connection between components.
Solution Approach 2:
The nozzle assembly is segmented into distinct functional zones: the guide rib creates a protective zone that separates the inlet flow path from the internal space, while the nozzle support rib provides structural support. This segmentation allows foreign substances to be directed away from critical combining portions.
2Reliability
If the guide rib extends backward to cover the combining portion, then foreign substance introduction is prevented, but the manufacturing complexity increases
Solution Approach 1:
The guide rib is merged with the nozzle front cover as an integrated structure, and the nozzle support rib is merged with the nozzle body. This combining of protective elements with existing components reduces the number of separate parts to manufacture and assemble, thereby simplifying the manufacturing process while maintaining protection against foreign substance introduction.
3Reliability
If washing water is discharged externally through the guide rib structure, then foreign substances are prevented from entering, but the fluid flow path becomes more complex
Solution Approach 1:
The guide rib structure creates a localized flow direction change rather than redesigning the entire flow path. The inlet flow path is designed to introduce washing water that flows along the guide rib, and the overlapping structure with the nozzle support rib creates a localized discharge region that directs foreign substances outward without significantly complicating the overall flow path configuration.
Data Source
AI summary
There is provided a dish washing machine, including a main body; a washing tank provided inside the main body; and a fixed nozzle assembly fixed in one side of the washing tank and configured to jet washing water, wherein the fixed nozzle assembly includes, a nozzle body having a jet nozzle configured to jet washing water; and a nozzle front cover combined with a front surface of the nozzle body, and wherein the nozzle front cover and/or the nozzle body include corresponding ribs to cover a combining portion between the nozzle front cover and the nozzle body to minimize a foreign substance from being introduced into the combining portion of the nozzle front cover and the nozzle body. According to such a configuration, it is possible to minimize contaminants from accumulating in the fixed nozzle assembly.