Air-supplementing enthalpy-increasing heat pump air conditioner integrated heat management system for electric bus

The invention relates to an air-supplementing enthalpy-increasing heat pump integrated thermal management air-conditioning system and method for an electric bus, the high-pressure side of a compressor is connected with a four-way valve, and an outdoor core body is connected with two branches: the outdoor core body is connected with a battery thermal management heat exchanger through a first one-way valve, and the battery thermal management heat exchanger is connected with the inlet side of a gas-liquid separator; the outlet side of the gas-liquid separator is connected with the low-pressure side of the compressor; the outdoor core body is connected with a main expansion valve, an outlet of the main expansion valve is also divided into two paths, and one path is connected with the battery heat management heat exchanger through a second one-way valve; the other path is connected with an indoor core body through an air supply intermediate heat exchanger; the indoor core body is connected with a four-way valve; t