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Solar water heaters require high-performance water temperature and water level controllers to achieve all-weather digital functions. In addition to various functions, the auxiliary components must have reliable performance. To meet hot water requirements in rainy weather, auxiliary electric heating is a necessary key component. Currently, most water temperature and water level controllers control the electric heating function by timed heating. To prevent dry burning, heating is not activated when the water level is half tank. It should also be noted that international standards for electric water heaters require the power supply part to have leakage protection or be equipped with a leakage protection plug. The relay driving the electric heating must be selected to meet high current requirements.
Product Introduction:The current quality of electric heating used in solar water heaters is not up to standard. Temporary dry burning resistance is claimed as anti-dry burning, but in dry burning, the power is only temporarily cut off, and after a few minutes when the temperature drops slightly, it automatically resumes heating. Frequent operation of the built-in thermostat can burn it out at any time and shorten the life of the heating tube. The water temperature and water level controller controls the time and temperature of heating the water tank. Therefore, the water temperature and water level controller with this function has different requirements for the electric heating tube. The heating tube does not need its own water temperature control, but must have overheat protection and anti-dry burning protection functions, so that it can be effectively protected under abnormal conditions. This function is achieved by embedding a 2-in-1 overheat protector in the heating tube. When the heating tube overheats or lacks water and dry burns, the built-in 2-in-1 overheat
protector quickly acts to cut off the power and stop heating. This protector will not reset until the relay supplying power to the heating tube disconnects its contacts. The protector will only reset after the relay stops supplying power to the heating tube. That is, the heating tube will not frequently power on and dry burn under abnormal conditions, thus effectively protecting the heating tube. (The electric heating tube with this function has obtained national patent protection.) Effective prevention of dry burning is the primary key condition for extending the life of the heating tube.
