A heat exchange device includes a heat exchanger and a mounting plate for fixing the heat exchange device, and includes first and second flow passages which are not in communication with each other. The mounting plate includes a communication hole, a protruding portion and a mounting hole. The protruding portion protrudes outwards from the front side of the mounting plate. The mounting hole extends through the protruding portion and the mounting plate and includes a valve core receiving cavity. The valve core receiving cavity is in communication with the communication hole via a connection groove at a back side of the mounting plate; the mounting plate is fixed to the heat exchanger in a sealed manner, the mounting hole is in communication with the first flow passage, and the communication hole is in communication with the first flow passage via the connection groove and the mounting hole.