Square vaporizer

The utility model discloses a square vaporizer which comprises a fin heat exchange pipe and a communicating pipe, the upper end and the lower end of the fin heat exchange pipe are respectively provided with a row of communicating pipes, the fin heat exchange pipe is fixedly connected with the communicating pipes through bolts, and a second bearing plate is arranged at the upper end of the intersection of the fin heat exchange pipe and the communicating pipes. According to the finned heat exchanger, a traditional mode that the communicating pipe and the finned heat exchange pipe are fixedly connected through the connecting flange is changed into an existing mode that the connecting flange is replaced with a fixed connection mode that the buffering piece is used for replacing the connectingflange. In this way, a certain buffering effect can be achieved between the communicating pipe and the fin heat exchange pipe under the action of the buffering piece during connection, and the sealinggasket and the buffering