①Good heat transfer efficiency. ②It has self-cleaning function. ③The non-detachable structure has good sealing performance and is suitable for heat exchange of highly toxic, flammable, explosive or precious fluids. ④ The fluid in adjacent channels flows in a pure countercurrent flow, which can obtain the largest logarithmic average temperature difference, which is conducive to heat transfer with small temperature differences and is suitable for recovering low-temperature heat energy. ⑤Compact structure, the heat transfer area per unit volume can reach 150m. ⑥ Due to the elastic free expansion of the spiral channel itself, the temperature difference stress is small. ⑦Low price.

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