Combined Four-way Valve, Air Conditioning System and Vehicle

Disclosed are a combined four-way valve, an air conditioning system, and a vehicle. The combined four-way valve includes a valve seat, a first control valve, a second control valve, a third control valve and a fourth control valve, where the valve seat is internally provided with an input port, an output port, a first opening, a second opening, and a plurality of valve cavities which are arranged at intervals and are arranged corresponding to the control valves on a one-to-one correspondence manner; the plurality of valve cavities include a first valve cavity, a second valve cavity, a third valve cavity and a fourth valve cavity; the valve cavities are in communication with one another by channels; the valve cavities are provided with inlets and outlets, and are in communication with flow channels in the valve seat.