OPEN TYPE UNDERGROUND HEAT EXCHANGER HAVING SUPPLY PIPE WITH SCREW PIN

摘要

The present invention relates to an open-type underground heat exchanger expediting turbulence formation for heat exchange efficiency improvement. According to the present invention, a spiral protrusion for expediting fluid turbulence formation is disposed in a supply pipe of the open-type underground heat exchanger and the fluid recovered underground through a recovery pipe from a building heat pump is allowed to flow underground while forming turbulence so that the heat exchange efficiency can be significantly improved. The present invention includes a supply pipe (10) that is disposed in a well hole (100) drilled underground; a deep well pump (30) that is disposed in the supply pipe for fluid suctioning and feeding to a suctioning hole (32); and a recovery pipe (20) that is arranged between the supply pipe (10) and the inner wall of the well hole (100) so that the fluid is recovered back from a heat pump, in which a protrusion for expediting turbulence formation is provided on the outer surface of the supply pipe (10) so that the fluid flowing into the well hole (100) through the recovery pipe (20) flows downward in the form of turbulence.