Novel ejector, fuel cell system, control method of system and vehicle

The invention relates to the technical field of new energy, in particular to a novel ejector, a fuel cell system, a control method of the system and a vehicle, the novel ejector comprises a drainage inlet, a mixing chamber, a diffusion chamber and an ejection outlet which are communicated in sequence; the ejector further comprises a first jet flow inlet and a second jet flow inlet, and the first jet flow inlet and the second jet flow inlet are communicated with the mixing chamber. Through the novel ejector with the first jet flow inlet and the second jet flow inlet, the injection pressure of the first jet flow inlet and the injection pressure of the second jet flow inlet can be respectively controlled through first hydrogen injection and second hydrogen injection, so that the injection capacity requirements of the fuel cell system under different working conditions are met; the jet flow energy of the first jet flow or the second jet flow can be fully utilized; by selecting the flow areas of the first nozzle a