Combined fan structure

A combined fan structure includes sub-fans and a connector connected between two adjacent sub-fans, the sub-fan includes an impeller mounting shell and an impeller assembly mounted on the impeller mounting shell, each of two sidewalls of the impeller mounting shell away from each other is respectively configured with two sockets, two sidewalls of the two sockets away from each other are each configured with an insertion opening configured for the connector to be inserted into, two sidewalls of the socket adjacent to the insertion opening are respectively configured with a limiting bar, a limiting channel is formed between the limiting bar and a bottom of the socket, the limiting channel is in communication with the insertion opening; a snapping groove is defined at the bottom of the socket, when the connecting plate body is inserted in the socket, the hook is snapped in the snapping groove.