Steam Generator Layout and Sensor Shielding for Washing Machines
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Solution Overview
Problem
Conventional steam generating devices for washing machines are difficult to install and maintain due to their rectangular shape, which leads to interference with other components and potential damage from vibrations, and they suffer from water level sensor malfunctions caused by air bubbles and splashing water.
Innovation Solution
A steam generating device with a water chamber having a vertical length longer than its horizontal length, a rib to prevent air bubbles, and a receptacle to protect the water level sensor, allowing for easier installation and reduced interference, while preventing air bubbles from entering the receptacle and ensuring the water level sensor's accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the steam generating device has a rectangular shape with small height and large width, then the steam generation function is achieved, but the device is difficult to install and may interfere with other components
Solution Approach 1:
The patent changes the dimensional configuration of the steam generating device from a horizontal orientation (small height, large width) to a vertical orientation (large height, small width). This dimensional transformation allows the device to fit into the limited vertical space between the tub and cabinet top, eliminating interference with other components while maintaining the steam generation function.
2Area of stationary object
If the steam generating device is installed close to the tub, then space is saved, but vibrations may cause damage to the device
Solution Approach 1:
The patent creates an asymmetric spatial arrangement by positioning the steam generating device vertically at the rear side of the washing machine, away from the tub. This asymmetric placement provides sufficient distance from vibration sources while efficiently utilizing the available vertical space, thus maintaining both compact installation and device reliability.
3Measurement precision
If the water level sensor is exposed to the water chamber, then water level detection is direct, but air bubbles and splashing water cause sensor malfunction
Solution Approach 1:
The patent introduces a receptacle as an intermediary structure that houses the water level sensor. This receptacle acts as a protective barrier, preventing air bubbles and splashing water from directly contacting the sensor while still allowing the sensor to detect water level through the receptacle wall, thus maintaining measurement accuracy while improving reliability.
Solution Approach 2:
The patent segments the water chamber into two functional zones: an inner region where water is heated and steam is generated, and an outer region containing the receptacle with the water level sensor. This segmentation isolates the sensor from harmful environmental factors while preserving its detection function.
4Productivity
If more water is used in the steam generating device, then steam generation capacity is increased, but the device size and water consumption increase
Solution Approach 1:
The patent changes the geometric parameters of the water chamber, specifically increasing the height-to-width ratio. This parameter change allows the device to hold sufficient water for effective steam generation while minimizing the overall volume and external dimensions, thus achieving good steam generation capacity with reduced water consumption and compact size.
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 design facilitates easier installation, reduces water usage and steam generation time, prevents water level sensor malfunctions, and enhances the overall performance and reliability of the steam generating device and washing machine.
Implementation Method 1
a heater (200) extending substantially in a vertical direction in the water chamber W, to heat the water contained in the water chamber W
Implementation Method 2
a water level sensor (300) arranged in the upper housing (120), to sense a level of water contained in the water chamber W
Data Source
AI summary
A steam generating device and a washing machine having the same are disclosed. The steam generating device includes a lower housing including a main portion for receiving a heater, and connecting portions extending outwardly from the main portion, the lower housing defining a water chamber for containing water, an upper housing connected to the connecting portions, the upper housing defining a steam chamber for containing steam, a water level sensor for sensing a level of water contained in the water chamber, and a receptacle for protecting the water level sensor. The receptacle has an opening for allowing water to be introduced into the receptacle, and is substantially aligned with an inner surface of the lower housing or is arranged at a position spaced apart from the heater by a longer distance than the inner surface of the lower housing.