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

Claim 0:
1. 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 provided 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;
wherein the outer coiled pipe is spirally coiled around a central axis; and
wherein an orientation of the flue gas outlet of the outer coiled pipe is parallel to the central axis.