Patent ID: 11906205
Assignee: QUANTITATIVE HEAT OY
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 4:
5. The geothermal heat arrangement according to claim 1, wherein:
the first pump is a reversible pump arranged to pump the primary working fluid in a direction towards the lower end of the ground hole in the rise pipe and upwards towards the ground surface in the drain pipe, or towards the lower end of the ground hole in the drain pipe and upwards towards the ground surface in the rise pipe, and that the geothermal heat arrangement comprises a control unit connected to the first pump and arranged to control the operation direction of the reversible first pump; or
the geothermal heat arrangement comprises a second pump arranged to pump the primary working fluid in a direction towards the lower end of the ground hole in the drain pipe and upwards towards the ground surface in the rise pipe, and that the geothermal heat arrangement comprises a control unit connected to the first pump and to the second pump arranged to control the operation of the first pump and the second for setting the circulation direction of the primary working fluid.