Roof machine

The utility model relates to a roof machine. The roof machine comprises a machine shell, a first heat exchange piece, a first draught fan and a second heat exchange piece. A first cavity and a secondcavity are formed in the machine shell, and the inner side wall of the first cavity is formed by splicing a plurality of first heat exchange faces end to end. The inner side wall of the second cavitycomprises two adjacent second heat exchange faces, and at least one second heat exchange face is provided with an air return opening. The first heat exchange piece is arranged in the first cavity andextends in the connecting direction of the multiple first heat exchange faces so as to form a heat exchange part in an enclosing mode. And the first fan is arranged in the heat exchange part. The second heat exchange piece is arranged in the second chamber, forms an included angle with the two adjacent second heat exchange surfaces, and is aligned with the air return port. The roof machine provided by the utility model can