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Title:
地中熱交換器
Document Type and Number:
Japanese Patent JP5867001
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an underground heat exchanger having three or more tubes for flowing heat medium in an excavation hole in which the efficiency of heat exchange is enhanced by suppressing short circuit between tubes in which flow directions of heat medium are reversed to each other.SOLUTION: An underground heat exchanger is inserted into an excavation hole formed vertically to a ground. The underground heat exchanger has a center tube which is arranged in a center part of a flat face in the excavation hole and in which the direction of a tube axis extends along a vertical direction, a plurality of surrounding tubes which are arranged between a center tube and an inner peripheral face of the excavation hole, in which the outer peripheral surface of the surrounding tubes are arranged opposing to the outer peripheral surface of the center tube, and in which a direction of tube axes extend along a vertical direction, and a branched part arranged below the center tube, branching the flow channel of the heat medium of the center tube and allocating the same to the respective surrounding tubes. The direction of the heat medium flowing through the surrounding tubes is opposite to the direction of the heat medium flowing in the center tube. The surrounding tubes are arranged such that the distance between the surrounding tubes and the inner peripheral face of the excavation hole is smaller than the distance between the surrounding tubes and the center tube.

Inventors:
Kaneko Tadashi
Yasuyuki Everyda
Kenji Mioda
Application Number:
JP2011253097A
Publication Date:
February 24, 2016
Filing Date:
November 18, 2011
Export Citation:
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Assignee:
Obayashi Corporation
International Classes:
F24J3/08; F28D17/02
Domestic Patent References:
JP2003302109A
JP9217968A
Foreign References:
US20100139886
US4715429
Attorney, Agent or Firm:
Isshiki International Patent Service Corporation