Dishwasher Ejection Arm Flow Switching for Multi-Rack Water Pressure
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Solution Overview
Problem
Conventional dishwashers face inefficiencies in washing and water management due to the complexity of multiple wash water flow paths and the need for separate ejection arms, which can lead to clogging and reduced washing effectiveness.
Innovation Solution
A dishwasher design featuring a tub with retractable racks, a flow path tower, and a single ejection arm with multiple flow paths, including a tower separable coupler and a flow path switcher that selectively opens these paths based on water pressure, allowing efficient distribution and ejection of wash water.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple separate ejection arms are used to distribute wash water to different racks, then washing coverage is improved, but device complexity increases and clogging risk increases
Solution Approach 1:
The patent combines multiple ejection functions into a single ejection arm structure. The flow path switcher allows one ejection arm to selectively direct wash water to different racks (upper, lower, or both simultaneously), replacing the need for multiple separate ejection arms while maintaining comprehensive washing coverage.
Solution Approach 2:
The single ejection arm is designed with multi-functionality through the flow path switcher mechanism. It can universally serve multiple racks by switching between different flow paths, making one component perform the functions previously requiring multiple dedicated components.
2Adaptability or versatility
If multiple separate ejection arms are used, then washing coverage is improved, but reliability decreases due to increased clogging risk
Solution Approach 1:
By merging multiple ejection functions into a single ejection arm with a flow path switcher, the patent reduces the number of separate flow paths and components that could potentially clog. The consolidated design minimizes the overall clogging risk while maintaining the ability to wash multiple racks.
3Device complexity
If a single ejection arm with flow path switcher is used, then device complexity is reduced, but washing effectiveness may be compromised
Solution Approach 1:
The flow path switcher introduces dynamic switching capability to the single ejection arm, allowing it to adaptively direct water flow to different racks based on washing needs. This dynamic mechanism ensures that washing effectiveness is maintained despite the simplified static structure of having only one ejection arm.
4Device complexity
If wash water flow paths are not selectively controlled, then device complexity is reduced, but water pressure consistency deteriorates
Solution Approach 1:
The flow path switcher acts as a control mechanism that responds to washing requirements by selectively opening or closing specific flow paths. This feedback-based control ensures that water pressure is consistently directed to the active washing zone, preventing pressure loss or misdirection that would occur without such control.
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
This design enhances washing efficiency by ensuring consistent water pressure and flow distribution, reducing clogging risks and improving the overall cleaning performance while maintaining a compact form factor.
Implementation Method 1
a flow path switcher provided inside the chamber, the flow path switcher selectively opening the first flow path, the second flow path and the third flow path according to a water pressure inside the chamber
Data Source
AI summary
A dishwasher includes a tub to provide a wash space, a first rack located inside the tub to receive a washing object and a second rack located below the first rack, a flow path tower provided at the second rack to eject wash water to the first rack, an ejection arm including a chamber for introduction of wash water, a first flow path in communication with the chamber, and second and third flow paths in communication with the chamber to eject wash water to the second rack and separated from each other, a tower separable coupler provided inside the ejection arm to connect the first flow path to the flow path tower when wash water is supplied to the first flow path, and a flow path switcher provided inside the chamber to selectively open the first, second and third flow paths according to a pressure inside the chamber.