Dishwasher Gyro Spray Head Layout for Soiling Resistance
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Solution Overview
Problem
Existing household dishwashers face challenges in achieving effective cleaning due to limitations in the design of spray facilities, particularly in terms of soiling resistance and distribution of washing liquor and fresh water, which can lead to reduced cleaning efficiency and potential malfunctions from dirt accumulation.
Innovation Solution
A household dishwasher with a spray facility featuring a rotatably supported gyro element within a cage, where the gyro element is positioned above the nozzle in relation to the direction of gravity, allowing for a hemispherical spray pattern and sufficient clearance to prevent soiling, combined with a nozzle that sprays water counter to gravity to raise and rotate the gyro element, enhancing cleaning efficiency and resistance to dirt accumulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the gyro element is positioned close to the nozzle for compact design, then the device complexity is reduced, but dirt particles accumulate in the gap causing malfunctions
Solution Approach 1:
The gyro element is inverted relative to the nozzle, with its bottom surface facing upward toward the nozzle. This inversion creates a self-draining configuration where water and dirt particles naturally flow away from the gap between the nozzle and gyro element due to gravity, preventing accumulation and maintaining reliability while keeping the device compact.
2Reliability
If the gyro element is positioned above the nozzle with sufficient clearance, then soiling resistance is improved, but the device height increases
Solution Approach 1:
The minimum clearance distance between the nozzle and the bottom surface of the gyro element is optimized to at least 3mm. This parameter change ensures sufficient space for water and dirt particles to pass through freely, providing soiling resistance while maintaining a compact overall device height suitable for integration into washing containers.
3Productivity
If the nozzle sprays water at high pressure to rotate the gyro element, then cleaning efficiency is improved, but energy consumption increases
Solution Approach 1:
The gyro element is designed to be dynamically rotatable on its support axis rather than fixed. The nozzle is positioned and angled to spray water onto the gyro element at an angle between 30-60 degrees, creating torque that naturally rotates the gyro element. This dynamic rotation distributes water more effectively across the washing container, improving cleaning efficiency while using moderate water pressure and energy.
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 provides improved cleaning results by ensuring effective distribution of washing liquor and fresh water in a soiling-resistant manner, maintaining operational efficiency even when dirt accumulates, and allows for a compact design that can be positioned below wash receptacles.
Implementation Method 1
the gyro element is arranged in its entirety above the nozzle in relation to a direction of gravity... the nozzle is preferably designed to spray the washing liquor and/or fresh water onto the gyro element counter to the direction of gravity... causing said gyro element to be raised into its operating position counter to the direction of gravity
Implementation Method 2
The rotatable support for the gyro element improves the cleaning result further... the gyro element... allows for a hemispherical spray pattern
Data Source
AI summary
A household dishwasher includes a washing container, and a spray facility arranged within the washing container for spraying washing liquor and/or fresh water in the washing container. The spray facility includes a cage, a gyro element rotatably supported in the cage, and a supply line having a nozzle for supplying the washing liquor and/or fresh water to the gyro element. The gyro element is arranged in its entirety above the nozzle in relation to a direction of gravity in an operating position which the gyro element assumes when washing liquor and/or fresh water is supplied to the gyro element.