There's no way to change the site dorm's only 36 volts
Site dormitory usb charging socket can not be converted into 220v socket, USB is direct current, if converted into a socket, you need to convert to AC, DC to AC, you need an inverter, there is no USB inverter on the market, so there is no way to convert. The household is AC 220v, USB is DC 5v2A, and it is easy to produce an electric fire after modification.
Under normal circumstances, the usb in the construction site dormitory can be changed to fast charging through the fast charging USB module. Under normal circumstances, the construction site dormitory uses a safe voltage of 36 volts, which can be quickly charged by using a fast charger supporting 36 volts DC voltage connected to the power supply interface of the dormitory.