Ultrasonic Mist Circulation in Dishwashers for Low-Water Cleaning
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Solution Overview
Problem
Existing dishwashers require a large amount of liquid to ensure effective cleaning through liquid mist condensation, which is inefficient and wasteful.
Innovation Solution
A dishwasher design featuring a nebulizing device located below the rinsing tub, coupled with a circulation device that forms a closed air circuit, allowing for the generation and circulation of a liquid mist within the washing compartment, reducing the overall liquid usage while ensuring effective mist distribution and penetration into soiled items.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a large amount of liquid is introduced into the washing tank to ensure satisfactory cleaning, then cleaning effectiveness is improved, but liquid consumption increases
Solution Approach 1:
The liquid stream is segmented into fine droplets through the nebulizing device, creating a mist that distributes cleaning liquid more uniformly across all surfaces. This segmentation allows effective cleaning with less total liquid compared to conventional spray methods.
Solution Approach 2:
The invention introduces liquid mist from below the washing tank floor, utilizing the vertical dimension differently than conventional top-down spray systems. The nebulizing device positioned in the floor directs mist upward through outlets, enabling penetration to items at various heights and positions, improving coverage efficiency.
2Reliability
If the nebulizer device is positioned to maximize mist distribution, then cleaning coverage is improved, but device complexity increases
Solution Approach 1:
The circulation device and nebulizing device are merged into an integrated system where the circulation device not only circulates liquid but also directs it to the nebulizing device. The air circulation paths are combined with the liquid mist distribution paths, creating a unified system that achieves comprehensive coverage without requiring separate complex distribution mechanisms.
Solution Approach 2:
The circulation device performs multiple functions: it circulates cleaning liquid, directs liquid to the nebulizing device, and facilitates air-mist circulation throughout the washing tank. This multi-functionality reduces the need for separate dedicated components for each function, simplifying the overall system while maintaining effective mist 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 design enables efficient cleaning with a smaller amount of liquid by generating and circulating a fine mist that penetrates into pores and cracks, enhancing cleaning effectiveness and reducing water consumption.
Implementation Method 1
a sound source coupled thereto, which causes the liquid in the liquid reservoir to oscillate and generates the liquid mist required for cleaning the items to be washed. The excitation frequency, which is generated by the sound source for generating the liquid mist, is preferably in a range from 1 to 3 MHz.
Implementation Method 2
The circulation device can have a fan or be based on the principle of convection. In both cases, air is sucked in from the rinsing tank and passed through the conveying device, the air being enriched with the liquid mist generated by the first device.
Implementation Method 3
The cleaning principle of this dishwasher is based on the generation of a liquid mist. The liquid mist is generated by an ultrasonic source, e.g. B. a piezo-ceramic, generated and applied to the items to be cleaned, which condenses and thereby removes impurities from the items to be washed.
Data Source
Figure 1
AI summary
The dishwasher (1) has a washing tub (2) for retaining washing objects that are washed. An atomizer device (17), with a sound generator (8), is provided for generating a fluid vapor, which is discharged into the washing tub. A circulating device (9) is provided, which generates a fluid vapor circulation in a circuit composed of the washing tub and the atomizer device.