Patent ID: 11867428
Assignee: A. O. SMITH CORPORATION
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F | IPC F

Claim 13:
14. A heat exchange having a spirally coiled heat exchange pipe which comprises a pipe body and a plurality of fins fixedly disposed to sleeve the pipe body,
wherein a flow guiding structure is provided at an outer edge of a fin of the plurality of fins;
wherein a flow guiding flue is formed between the flow guiding structure and an outer wall of the pipe body,
wherein the heat exchange pipe comprises an inner coiled pipe and an outer coiled pipe surrounding the inner coiled pipe;
wherein a partition board is between the inner coiled pipe and the outer coiled pipe;
wherein a flue gas outlet of the flow guiding flue of the inner coiled pipe faces the partition board; and
wherein in the outer coiled pipe, the flue gas outlet of the flow guiding flue of one circle of the heat exchange pipe faces the flue gas inlet of the flow guiding flue of a next circle of the heat exchange pipe.