Valve element, four-way valve and vehicle

The utility model provides a valve core, a four-way valve and a vehicle, the valve core is cylindrical, the valve core is provided with a first groove and a second groove, the first groove and the second groove are formed by sinking towards a central shaft of the valve core along the radial direction of the valve core from the peripheral surface of the valve core, and the first groove and the second groove are symmetrical along the central shaft; the first groove is formed by sinking from one side of the peripheral face of the valve element towards the central axis of the valve element in the radial direction of the valve element, the second groove is formed by sinking from the other side of the peripheral face of the valve element towards the central axis of the valve element in the radial direction of the valve element, and compared with the mode that a through hole is formed in a cylindrical valve element to form a flow channel, the depth of the first groove and the depth of the second groove can be larger. The flow volume of the valve element is increased, and the flow volume in the valve element is increased.