Humidifier Float-Switch Water Level Control to Prevent Dry Burning
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Solution Overview
Problem
Traditional humidifiers require users to wait for the heating element to cool down after running out of water, leading to poor user experience and potential damage due to dry burning, which affects the service life of the humidifier.
Innovation Solution
Incorporating a float and a micro switch in the water tray to automatically control the heating member's operation based on water level, enabling automatic shutdown when water runs out and immediate startup upon refilling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional humidifiers run out of water, then the heating element continues to operate, but this causes dry burning that damages the heating element and reduces service life
Solution Approach 1:
The float and micro switch are pre-positioned to detect water level before the heating element runs dry. When the water level drops to a critical point, the float descends and triggers the micro switch to cut off power to the heating element in advance, preventing dry burning damage before it occurs.
Solution Approach 2:
The float-micro switch mechanism provides continuous feedback on water level status to the heating element control system. The float responds to water level changes and automatically signals the micro switch to adjust the heating element's operation, creating a closed-loop feedback system that prevents harmful dry burning conditions.
2Ease of operation
If traditional humidifiers run out of water, then the heating element must cool down before refilling, but this creates waiting time that degrades user experience
Solution Approach 1:
The system performs preliminary shutdown of the heating element when water level drops, before the user needs to refill. This proactive approach eliminates the need for users to wait for cooling, as the heating element is already off and safe to refill immediately.
Solution Approach 2:
The float-micro switch system automatically manages the heating element's operation based on water level, without requiring user intervention or waiting. The system self-regulates by shutting down the heating element when water is low and readying it for immediate restart upon refilling, making the device convenient and responsive to user needs.
3Reliability
If the heating element operates without water level monitoring, then the structure is simple, but this lacks automatic control that prevents dry burning
Solution Approach 1:
The float acts as an intermediary mechanism that translates water level position into mechanical motion, which then actuates the micro switch. This intermediary system provides reliable automatic protection against dry burning while maintaining relatively simple implementation, as the float-micro switch combination is a straightforward mechanical-electrical interface.
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
Enables automatic shutdown and startup based on water level changes, improving user experience by eliminating waiting time and preventing dry burning, thus extending the heating member's service life.
Implementation Method 1
a float located in the first water tray and operable to rise/fall with change of a water level in the first water tray
Implementation Method 2
an atomization assembly mounted at the base and formed with a mist-guide passage in fluid communication with the first water tray, the atomization assembly including a heating member operable to form mist in the mist-guide passage
Data Source
Figure 1
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AI summary
Provided in the present application is a humidifier, comprising: a base, which is provided with a first water channel; an atomization assembly, which is mounted on the base, is provided with a mist guide passage in fluid communication with the first water channel, and comprises a heating element adapted to form mist in the mist guide passage; a water tank, which is mounted on the base and is provided with a water chamber in fluid communication with the first water channel; a float, which is located in the first water channel and is adapted to rise and fall with changes in the water level in the first water channel; and a micro switch, which is electrically connected to the heating element and is adapted to switch the heating element on or off as the float rises and falls. The float is arranged in the first water channel of the base, and drives the micro switch to switch status so as to control the heating element to work. When the water level rises, the float drives the micro switch to be switched on, and the heating element works; and when the water level falls, the micro switch is switched off, and the heating element stops working. Therefore, the humidifier controls the working status of the heating element through changes in the water level.