220 electricity refers to the alternating current voltage, usually referring to the voltage of 220 volts (V). In China, the power supply voltage for household electricity is 220V, so most electrical equipment supports 220V voltage. Compared with 110V voltage, 220V voltage is not only more stable, but also can provide greater power, so it is more common in many applications.
220V voltage is one of the most common household power sources in China, and many devices are designed based on 220V voltage. For example, household appliances such as air conditioners, refrigerators, TVs, and computers all need to use 220V voltage. At the same time, in many industrial fields, 220V voltage is also necessary, such as controlling motors, driving lighting equipment, etc. The normal operation of these devices requires the support of 220V voltage.
Although 220V voltage is one of the most common household power sources in China, in some special occasions, equipment with other power supply voltages is still needed. For example, some equipment imported from abroad may use 110V voltage in their country of origin. If they are to be used domestically, voltage adaptation is required. In addition, some special application fields, such as medical, aviation and other fields, also need to use different power supply voltages to meet special needs.