Single-pressure and double-pressure adjustable electric air compressor

The invention belongs to the technical field of pressurization, and discloses a single-pressure and double-pressure adjustable electric air compressor. The electric air compressor comprises a low-pressure-stage air compressor impeller, a low-pressure-stage air compressor volute, a high-pressure-stage air compressor impeller, a high-pressure-stage air compressor volute, a motor rotor, a motor stator, an intermediate shell, a turbine box, a turbine impeller, a high-pressure-stage outlet valve, an interstage valve, a low-pressure-stage outlet pipeline section and a high-pressure-stage inlet pipeline section. And a high-pressure stage outlet pipeline section and a total outlet pipeline section. Through combined switching of the states of the two valves, the two-stage gas compressor can work in a tandem type two-stage supercharging state, the high-pressure-stage gas compressor can be bypassed, and the low-pressure-stage gas compressor can work independently. The electric air compressor has two working states of si