Steam generator

摘要

A heat exchanger for an instant steam generator is disclosed comprising a small diameter, continuous metal tube formed into a closed, cylindrical helix. A heat source in contact with either surface of the helix such as a cartridge heater inserted into the helix generates steam in the water flowing in the tube. A set of thermostats in contact with each end of the helix permits fast turn on of the heater but prevents overheating and fusion of the output end of the helix.