This kind of Heat Exchanger is to bend the metal pipe into various shapes suitable for the container and immerse it in the liquid in the container. The advantage of the snake tube heat exchanger is that the structure is simple, can withstand high pressure, and can be made of corrosion-resistant materials; its The disadvantage is that the liquid turbulence in the container is low, and the heat coefficient outside the tube is small. In order to improve the heat transfer coefficient, a stirrer can be installed in the container.