Dishwasher Water Distribution Valve for Low-Loss Zone Spraying
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Solution Overview
Problem
The existing linear spray structure in dish washing machines experiences pressure loss and reduced spatial availability due to the fixed position of spray nozzles, leading to incomplete washing of the wash tank regions.
Innovation Solution
A distribution device with a cylindrical housing, rotating opening/closing member, and motor is introduced to selectively distribute wash water to all or partial regions of the wash tank, minimizing pressure loss and enhancing spatial coverage by adjusting outlet positions and flow paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixing nozzle is disposed adjacent to a rear wall of the wash tank, then the outlet of the distribution device does not need to be disposed upward, but the flow path connecting the outlet of the distribution device and the fixing nozzle has to be curved backward, causing loss of pressure of wash water to increase
Solution Approach 1:
The distribution device incorporates a rotatable opening/closing member that can selectively change the flow path configuration. This dynamic element allows the system to adapt the flow path geometry, minimizing backward curvature and pressure loss when fixed nozzles are used, while still providing operational flexibility in outlet disposition.
Solution Approach 2:
The opening/closing member changes the flow path parameters (direction, curvature, length) by rotating to different positions. This parameter adjustment optimizes the flow path to reduce pressure loss while maintaining the ability to dispose outlets in various configurations relative to the rear wall.
2Adaptability or versatility
If spray nozzles are fixed in the linear spray structure, then wash water is distributed only to some of the spray nozzles, enabling a division washing operation, but regions to which wash water is not sprayed remain, leading to incomplete washing
Solution Approach 1:
The opening/closing member is rotatable to selectively open or close different outlets, enabling dynamic switching between division washing mode (opening specific outlets for targeted regions) and complete washing mode (opening all outlets for full coverage). This resolves the contradiction by providing both adaptability for division washing and reliability for complete washing.
Solution Approach 2:
The distribution device divides the wash water distribution into multiple independent outlets that can be controlled separately. The opening/closing member segments the flow paths, allowing selective activation of specific nozzle groups for division washing while maintaining the capability to activate all outlets for complete washing coverage.
3Productivity
If a rotation nozzle is used, then wash water is sprayed within a range of a rotation radius, but there may be some regions to which the spray water is not sprayed
Solution Approach 1:
The system segments the spray coverage by using multiple fixed nozzles positioned at different locations and angles. Each nozzle covers a specific zone, and together they provide complete wash tank coverage without leaving unsprayed regions, replacing the single rotation nozzle's limited coverage.
Solution Approach 2:
The opening/closing member provides multi-functionality by enabling both selective outlet activation for targeted washing and complete outlet activation for full coverage washing. This universal control mechanism ensures all regions of the wash tank can be sprayed as needed, eliminating unsprayed zones.
Data Source
AI summary
A dish washing machine includes a plurality of spray nozzles to spray wash water, a sump to store wash water, a pump to pump wash water stored in the sump, and a distribution device to distribute wash water pumped by the pump into the plurality of spray nozzles. The distribution device includes a cylindrical housing having an inlet formed in one axial end portion thereof and a plurality of outlets that are arranged in a circumferential surface of the cylindrical housing in an axial direction and connected to the plurality of spray nozzles, an opening/closing member rotatably disposed within the cylindrical housing to open and close the plurality of outlets, and a motor to rotate the opening/closing member. Wash water may be independently sprayed from a plurality of nozzles, a wash tank may be dividedly washed, and loss of pressure of wash water may be reduced, thereby increasing washability.