Coil heat exchanger

The utility model relates to the field of heat exchangers, in particular to a coil heat exchanger. The coil heat exchanger can automatically control the flowing condition of an internal medium, and has a certain degree of acid corrosion resistance. Main function realization parts of the device comprise a shell structure, a coil pipe structure and a moving structure. Wherein the coil pipe structure is arranged in the shell structure, the moving structure is arranged on the shell structure, the coil pipe structure is fixedly connected with the shell structure, and the moving structure is slidably connected with the shell structure. The shell structure is mainly responsible for fixing and supporting other working structures of the device, and the shell structure provides a flowing channel for a cold medium; the coil pipe structure is mainly used for heating and exchanging a cold medium and can assist the moving structure to work through structural arrangement; the moving structure is mainly used for controlling