Humidifier Water Level Detection Using Air Outlet Temperature
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Solution Overview
Problem
Existing humidifiers require frequent manual monitoring of water levels, leading to inefficiencies and safety risks due to potential overheating when water is low, and existing solutions like float and reed switch systems are difficult to clean and inaccurate.
Innovation Solution
A humidifier with a temperature sensor at the air outlet that generates signals indicating temperature, which a processor uses to determine the water level by calculating temperature slope changes, eliminating the need for complex reed switches and providing accurate and automatic water level monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a float and reed switch system is used for water level detection, then automatic monitoring is achieved, but the device becomes difficult to clean and accuracy decreases
Solution Approach 1:
The patent extracts the water level detection function from the traditional float-reed switch mechanical system and relocates it to the control unit that processes temperature sensor data from the air outlet. This separation eliminates the need for mechanical components inside the water reservoir, making cleaning straightforward while maintaining automatic monitoring capability through the control unit's analysis of temperature signals.
2Extent of automation
If a float and reed switch system is used for water level detection, then automatic monitoring is achieved, but measurement accuracy is poor due to tolerance stacking
Solution Approach 1:
The patent replaces the mechanical float-reed switch system with an electronic detection method. The control unit monitors temperature signals from a temperature sensor positioned at the air outlet, analyzing temperature variations to infer water level. This electronic approach eliminates mechanical tolerance stacking issues and provides more precise water level detection through continuous temperature-based measurement.
3Reliability
If more water is stored in the tank to avoid frequent monitoring, then safety is improved, but the size and manufacturing cost increase
Solution Approach 1:
The patent implements a feedback mechanism where the control unit continuously receives temperature signals from the temperature sensor at the air outlet and automatically adjusts operation based on water level conditions. When water level drops, the control unit detects temperature changes and responds by adjusting the heating element or notifying the user, eliminating the need to overfill the tank for safety margins.
4Device complexity
If manual water level monitoring is required, then device complexity is reduced, but productivity and user convenience decrease
Solution Approach 1:
The control unit serves multiple functions: it controls the heating element, manages the cooling fan, and performs water level detection by analyzing temperature signals. This multi-functionality allows the system to maintain relatively simple overall structure while providing automatic water level monitoring that improves operational efficiency and prevents overheating without requiring complex separate monitoring hardware.
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 simplifies the humidifier's structure, enhances accuracy, and reduces manufacturing costs by automatically detecting water levels, preventing overheating and ensuring continuous operation.
Implementation Method 1
a temperature sensor for detecting the temperature at an air outlet of the humidifier and for generating temperature signals indicating the temperature thereof
Implementation Method 2
the temperature at the air outlet of a humidifier is effectively lowered when the air downstream carries enough cold water vapor through the air outlet
Data Source
AI summary
The present invention relates to a humidifier and a method of monitoring the water level in the humidifier, the method comprising the steps of: detecting the temperature at the air outlet of the humidifier and generating temperature signals indicating the temperature thereof (310, 410); determining the water level in the humidifier according to the generated temperature signals (330, 430). The water level in the humidifier can be monitored using a rather simple structure yielding a high accuracy.