EXTREMITY MEMBER FOR UNDERGROUND HEAT EXCHANGER, MAIN BODY FOR UNDERGROUND HEAT EXCHANGER, UNDERGROUND HEAT EXCHANGER, UNDERGROUND HEAT EXCHANGING SYSTEM, AND WORKING METHOD

摘要

PROBLEM TO BE SOLVED: To provide an extremity end member for an underground heat exchanger that is installed at a low cost.SOLUTION: An extremity end member 1 is arranged at an end part 21 of an outer pipe 2, includes an extremity end part 1a and a rear end part 1b capable of closing the end part 21 against liquid medium in a liquid-tight manner and there is provided a fixing part capable of winding a wire material 3 around an outer circumferential side surface of an outer pipe 2 when the extremity end member 1 is buried in the ground while being rotated. A main body 41 for an underground heat exchanger includes the extremity end member 1 and the outer pipe 2 and the wire material 3 is wound around the outer circumferential side surface 23 of the outer pipe 2. The underground heat exchanger includes the main body 41 and a resin inner pipe. A clearance formed between the inner pipe and the outer pipe 2 is applied as a liquid medium flow passage. The underground heat exchanging system includes an underground heat exchanger and flowing means for flowing the liquid medium. A method of this system includes a step for fixing one end 31 of the wire material 3 to the fixing part, raising up the extremity end 1a against the ground, rotating the outer pipe 2, winding the wire material 3 around the outer circumferential side surface 23, forming the main body 41 there and burying it.SELECTED DRAWING: Figure 4