Introduction double bellows turbulent volume of heat exchanger: is a new volume of heat exchanger, it is not only the use of advanced dual bellows turbulence as the heat transfer element, vertical double bellows volume heat exchanger and turbulence in the heat exchanger structure has significant improvements, so that all of the heat exchanger performance has improved significantly. This product is suitable for general industrial and civil construction of water supply systems. Htm for steam or hot water. Its characteristics are: (1) start fast because of the special structure of the product, so that produce hot water quickly reach the hot water outlet at the top of the tank, do not need to be out most of the cold water supply of hot water heating. Horizontal double bellows turbulent volume of heat exchanger (horizontal double bellows turbulent volume heat exchanger) (vertical double bellows turbulent volume heat exchanger) (2) heat transfer coefficient is double bellows turbulence Efficient heat transfer components and external thread of high thermal conductivity of copper or stainless steel combination of heat plus a reasonable internal structure, so that the fluid flows through the tubes beam speed, form a strong turbulence, greatly improved a tube heat transfer coefficient and beyond. (3) difficult to scale as a result of the use of copper or stainless steel tubes, but also easy to form a fluid turbulence on the wall tubes strong scouring action with double bellows itself turbulent thermal compensation capability, through expansion and contraction There are self-cleaning effect, so difficult to scale. (4) no cold zones, high capacity utilization of the product is always at the bottom of the tank heating cold water, when water supply is less than the rated capacity, and gradually all the cold water tank is heated, then no cold zones, in order to maintain maximum hot water reserve amount. When the water supply is greater than the rated capacity, and instant hot water heating hot water storage tank at the same time to spend outside peak water supply. When the result of an accident or other reasons to stop heating the media, to maximize the stored hot water supply. (5) The energy-saving products in the steam as heat medium, condensate temperature is below 80 ℃.