公开(公告)号：US12215929B2

公开(公告)日：2025-02-04

申请号：US18016735

申请日：2021-07-05

Applicant: IDO CO., LTD

Inventor： Young il Song

IPC: F24H3/00 ,  F28D7/10 ,  F28D21/00

Abstract: Disclosed is a device for recovering waste heat from hot water. The waste water heat recovery device includes heat exchange units each having a waste water pipe part along which waste water as the hot water flows and a raw water pipe part along which raw water as cold water flows, while being located inside the waste water pipe part, and a rotation driving part for rotating the raw water pipe parts. Each raw water pipe part includes a rotary shaft, a spiral blade attached to the outer peripheral surface of the rotary shaft, and a raw water pipe spirally wound on the outer peripheral surface of the rotary shaft to flow the raw water therealong, while being disposed along the space formed by the spiral blade on the outer peripheral surface of the rotary shaft. While the raw water pipe is rotating, foreign matter flowing along the waste water pipe part is discharged by means of the spiral blade, and the raw water pipe is disposed below top of the spiral blade to thus have no contact with the inner peripheral wall of the waste water pipe part.