Evaporative Air Cooler with Cooling Pad

Working principle of the water level indicator of Evaporative Air Cooler with Cooling Pad

1. Working principle of the water level indicator
a. Float design
Float principle: In many evaporative coolers, the water level indicator adopts a float design. The float is usually made of lightweight materials and can float on the water surface. When the water level rises, the float rises with it, and vice versa.
Mechanical trigger: The float is connected to a mechanical switch through a lever. When the float reaches a certain height, the lever triggers the switch to display the water level status to the user (such as through a pointer or indicator light). This design is simple and intuitive, and easy to maintain.
Water level indication: The movement position of the float is directly linked to the water level, and the user can understand the current water level by checking the indicator. For example, a red indicator light may mean that the water level is too high, while a green indicator light means that the water level is normal.
b. Electronic liquid level sensor
Sensor type: Some high-end coolers use electronic liquid level sensors, common ones are capacitive, ultrasonic and float sensors. Capacitive sensors monitor water levels by sensing changes in water conductivity, while ultrasonic sensors measure water level height by emitting sound waves.
Real-time monitoring: These sensors can monitor water level changes in real time and transmit information to the control system, providing more accurate water level data.
Digital display: Water level information is usually displayed in digital form on the device panel, and users can clearly see the water level status.

2. Mechanisms to prevent overfilling
a. Automatic stop of water inflow
Float control: In the float design, when the water level reaches the set highest point, the float rises to a certain height, triggering the control valve to close. This mechanism can automatically stop water inflow before the water level is too high to prevent overflow.
Electronic valve control: In the electronic liquid level sensor, when the water level is too high, the sensor will send a signal to the control system to automatically close the water inlet valve. This intelligent design improves the safety of the system.
b. Overflow drain
Design purpose: The overflow drain is another important design to prevent the water tank from being overfilled. It allows excess water to flow out automatically when the water level is too high, preventing water from overflowing outside the equipment.
Position setting: The overflow port is usually located on the top or side of the water tank to ensure that the water can be discharged smoothly when the water level exceeds the safety line.
c. Alarm system
Sound and light alarm: Some equipment is also equipped with a sound and light alarm system. When the water level is close to being overfilled, the system will sound an alarm to remind the user to deal with it in time to avoid overfilling.
User prompts: The alarm system is usually combined with the control panel to provide users with intuitive visual or auditory prompts.