FITTING MEMBER OF BLAST OPENING IN UNDERGROUND HEAT EXCHANGE TYPE BLAST PIPE FOR INCREASING BLAST RATE

摘要

PURPOSE:To reduce blast resistance to increase heat exchange efficiency, by employing a tapered pipe to be connected with a blast pipe for underground heat exchanger, and by inserting a tapered end of the tapered pipe into the blast pipe to be secured thereto. CONSTITUTION:An underground part of a blast main tube 3 equipped with a blower 8 has a blast opening 5 into which is inserted and secured a connector member 1 having tapered ends 6 which are in turn inserted and secured into ends 4 of the blast pipes 2. The tapered end 6 has slits to facilitate the insertion with the diameter thereof caparable of being decrease.