Dishwasher Spray Arm Flow Switching for Uniform Water Pressure
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Solution Overview
Problem
Conventional dishwashers face issues with inconsistent water pressure and uneven distribution of washing water, leading to unstable operation of the path change unit and potential failure in effectively supplying water to all channels, which affects washing efficiency and performance.
Innovation Solution
The dishwasher incorporates a circular cone-shaped outlet guider to disperse washing water uniformly into the chamber, a washing water storage portion to maintain consistent pressure, and a path change unit that rotates to open specific channels based on buoyancy, ensuring balanced water supply and enhanced washing performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If washing water is supplied directly to the spray arm without a storage portion, then the structure is simpler, but water pressure is inconsistent and distribution is uneven
Solution Approach 1:
The washing water storage portion stores washing water in advance before it is supplied to the spray arm. This preliminary storage ensures that water is readily available and maintains consistent pressure when needed, eliminating the inconsistency that would occur with direct supply.
Solution Approach 2:
The washing water storage portion acts as an intermediary between the water supply source and the spray arm. It mediates the water flow to ensure uniform distribution to all spray holes, solving the uneven distribution problem while maintaining structural simplicity.
2Adaptability or versatility
If a path change unit is used to supply water to multiple channels, then water can be distributed to different areas, but the unit becomes unstable and may fail to supply water effectively
Solution Approach 1:
The washing water storage portion serves as a stable intermediary that receives water from the supply source and distributes it uniformly to the path change unit. This ensures the path change unit operates reliably with consistent water pressure, preventing instability and failure.
Solution Approach 2:
The storage portion maintains consistent water pressure by storing water and releasing it steadily to the path change unit. This parameter stabilization ensures the path change unit can reliably switch between channels without instability, while still maintaining the ability to distribute water to multiple areas.
3Manufacturing precision
If washing water is supplied directly to the spray arm, then the structure is simpler, but water distribution to all channels is uneven
Solution Approach 1:
The washing water storage portion acts as a mediating structure between the water supply and the spray arm. It receives water and distributes it uniformly to all spray holes through its internal structure, ensuring even water distribution to all channels while adding minimal structural complexity.
Solution Approach 2:
The storage portion performs preliminary distribution of water to all spray holes before water reaches the spray arm. This preliminary uniform distribution ensures that all channels receive equal water supply, achieving manufacturing precision in water distribution.
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 solution ensures uniform water distribution and stable operation of the path change unit, improving washing efficiency by maintaining consistent pressure and evenly supplying water to all channels, thereby enhancing the overall washing performance.
Implementation Method 1
a washing water storage portion provided as a partition wall projected a preset height from a bottom surface of the chamber and comprising a storage space in which the washing water is stored for a preset time period
Implementation Method 2
a path change unit provided in the chamber and rotated a preset angle by the pressure of the washing water supplied to the chamber
Data Source
AI summary
A dishwasher includes a cabinet having a tub, a pump and at least one spray arm. The at least one spray arm has a flow path guide and first and second flow channels separated from each other. The flow path guide has a first opening to allow wash water to flow to the first flow channel and a second opening to allow wash water to flow to the second flow channel. A valve is coupled to the flow path guide and is configured to open or close one of the first opening and the second opening. The valve includes a rotatable float. The rotatable float closes the first opening while opening the second opening at a first point in time, and the rotatable float rotates to open the second opening while closing the second opening at a second point in time.