Steam Boiler Fill Level Sensor Protective Sleeve
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Solution Overview
Problem
Steam cleaning devices face challenges in accurately detecting the fill level due to air bubbles and foam formation, which can lead to incorrect measurements and the risk of liquid droplets being entrained by the steam, resulting in inefficient operation and potential material waste.
Innovation Solution
A protective element, such as a sleeve, is placed around the fill level sensor to reduce exposure to air bubbles and foam, with strategically positioned passage openings for cleaning liquid and air/steam to equalize pressure and prevent liquid droplets from entering the steam outlet, while the sensor is offset from high-energy areas to minimize bubble formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the steam boiler has a relatively small volume to reduce heating-up time and material usage, then the heating-up time is reduced and manufacturing costs are lowered, but the cleaning liquid bubbles up more and forms foam, making fill level detection more difficult
Solution Approach 1:
The steam boiler is divided into two functional zones: a heating zone with high energy concentration for efficient heating, and a detection zone with a protective element surrounding the fill level sensor where liquid bubbles and foam are excluded. This segmentation allows the boiler to maintain small volume for quick heating while creating a separate measurement area with calm liquid surface for accurate detection.
2Measurement precision
If the fill level sensor is exposed directly to the cleaning liquid in the steam boiler, then the sensor can detect the fill level, but air bubbles and foam interfere with accurate measurement
Solution Approach 1:
A protective element in the form of a sleeve with passage openings is introduced as an intermediary between the fill level sensor and the cleaning liquid. This intermediary structure allows the sensor to detect the fill level through the wall of the protective element while excluding air bubbles and foam from direct contact with the sensor, thereby maintaining both detection capability and measurement accuracy.
3Speed
If the steam outlet is open to allow steam to escape, then steam can be discharged, but liquid droplets are entrained by the steam and escape from the boiler
Solution Approach 1:
The protective element is designed with different local qualities: the wall surrounding the sensor provides protection from bubbles and foam, while the passage openings at the lower end allow liquid to enter and exit. This localized structural design creates a calming zone that separates liquid droplets from the steam flow path, allowing rapid steam discharge while preventing liquid droplet entrainment.
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 configuration significantly reduces the risk of incorrect fill level measurements and liquid droplet entrainment, ensuring accurate liquid level detection and efficient operation by creating a calming zone around the sensor, thus enhancing the device's reliability and performance.
Implementation Method 1
Water is usually used as the cleaning liquid. The cleaning liquid can be pumped to an electrically heated steam boiler. Inside the boiler, the cleaning liquid is vaporized and the vapor can then be directed under pressure at a surface to be cleaned.
Implementation Method 2
The cleaning liquid can be pumped to an electrically heated steam boiler
Implementation Method 3
The fill level is detected by a fill level sensor, which is arranged in the steam boiler and provides a signal for controlling the pump.
Data Source
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AI summary
The invention relates to a steam-cleaning device (10) having a liquid tank (24) for a cleaning liquid and having an electrically heatable steam boiler (28) for generating steam which can be applied to a surface to be cleaned, wherein liquid can be fed from the liquid tank into the steam boiler (28) by means of a pump (29) as a function of the filling level of the liquid in the steam boiler and wherein the filling level can be detected by means of a filling level sensor (62) arranged in the steam boiler. In order to develop the steam-cleaning device in such a way that the risk of faulty measurements of the filling level in the steam boiler is reduced, it is proposed according to the invention that the filling level sensor (62) in the steam boiler is surrounded by a protective element (68) which has at least one through-opening (80, 81).