Voltage stabilizers are widely used in household electrical appliances as a key device to ensure their safe and stable operation. Low voltage is common in civil power systems, which can lead to difficult startup, sluggish operation and even frequent shutdowns of household appliances such as air conditioners, refrigerators, washing machines and televisions. Such low voltage not only disables normal use but also tends to damage the precise circuits and core components inside appliances. Meanwhile, affected by peak power consumption, line load changes and the startup/shutdown of nearby high-power equipment, the power grid voltage fluctuates significantly. Unstable high and low voltage seriously interferes with the normal operation of household appliances, causing malfunctions and greatly shortening their service life. Voltage stabilizers can monitor mains voltage in real time and adjust it quickly and accurately, stabilizing the unstable voltage within the rated range suitable for household appliances. They thoroughly solve problems caused by low voltage and excessive fluctuations, providing stable and continuous power supply for household electrical appliances and ensuring their safe operation.