A capillary tube thermostat helps prevent overheating in geysers by automatically regulating the temperature of the water. Here's how it works:
Temperature Sensing: The thermostat includes a sensor bulb filled with a temperature-sensitive medium (gas, liquid, or wax) that expands as the water heats up.
Pressure Transmission: As the medium expands, the pressure is transmitted through the capillary tube to a diaphragm or bellows within the thermostat.
Activation of the Switch: The pressure change activates a switch that controls the heating element. Once the water reaches the preset temperature (typically between 40°C and 75°C), the switch cuts off the power to the heating element.
Preventing Overheating: If the water continues to heat beyond the set point, the thermostat will prevent further heating by keeping the switch off. This helps avoid overheating and ensures the geyser operates safely within the desired temperature range.
Reactivation: As the water cools down, the medium contracts, which activates the switch to re-enable the heating element, ensuring that the water is reheated to the set temperature.
This automatic on-off control cycle effectively prevents the geyser from reaching dangerous temperature levels, enhancing both safety and energy efficiency.
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