Double-stage dry-type oil-free screw compressor with multiple cooling modes and cooling method of double-stage dry-type oil-free screw compressor

The invention relates to the technical field of compressors, in particular to a multi-cooling-mode two-stage dry type oil-free screw compressor and a cooling method thereof.The multi-cooling-mode two-stage dry type oil-free screw compressor comprises a box body, a compressor body is installed in the box body, and a cooling part is installed at the upper end of the compressor body and fixedly connected with the compressor body through a cooling water pipe; the cooling water pipe is matched with the cooling part to form cooling circulation, a cooling cavity is formed in the cooling part, a cooling box is installed in the cooling cavity, the cooling unit is located in the cooling box, fins are arranged on the outer side of the cooling unit, and the cooling unit is used for dispersing cooling water; according to the two-stage dry-type oil-free screw compressor and the cooling method thereof, the cooling unit arranged in the two-stage dry-type oil-free screw compressor is matched with the cooling box, the heat exc