| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a flow path switching type geothermal water circulation apparatus capable of suppressing its manufacturing cost by simplifying its structure and further suppressing its installation cost by taking advantage of the existing wells. <P>SOLUTION: The flow path switching type geothermal water circulation apparatus includes an outer pipe 2 to be buried to a depth having an aquifer L, an inner pipe 3 arranged within the outer pipe 2, a top strainer 4 provided on the outer pipe 2, a bottom strainer 5 provided on the inner pipe 3, and a circulation shield unit 14 that shields vertical circulation within the outer pipe 2, a pump 8 for outer pipe that lifts geothermal water contained within the outer pipe 2, a pump 9 for inner pipe that lifts geothermal water contained within the inner pipe, a heat exchanging means 10 that performs heat exchange using the geothermal water as a heat source, a restoration pipe 11 for outer pipe that restores the geothermal water into the outer pipe 2, a restoration pipe 12 for inner pipe that restores the geothermal water into the inner pipe 3, and a mode switching means 13 that performs switching between a first mode and a second mode. <P>COPYRIGHT: (C)2013,JPO&INPIT |
