Buried vertical threaded exchanger for heating or cooling apparatus

Abstract

A hollow pile suitable for being sunk substantially vertically into the soil by screw-sinking, said hollow pile being characterized in that it has: at least one helical fin ( 2 ) having a flattened shape and a small pitch suitable for causing the pile to be sunk by a few centimeters per turn, when said pile is caused to move in rotation, the helical fin ( 2 ) finding itself united mechanically with and in thermal contact with the outside wall of the pile ( 1 ); and internal partitioning ( 3 ) defining an axial compartment ( 11 ) and an outer compartment ( 12 ) that communicate with each other at the bottom ( 13 ) of the pile; said hollow pile being characterized in that: the helical fin ( 2 ) is in direct thermal contact with the outer compartment ( 12 ) through the thickness of wall of the pile ( 1 ); and the outer compartment ( 12 ) has a flow section (S 2 ) that is significantly smaller than the flow section (S 1 ) of the axial compartment ( 11 ).

1 . A hollow pile suitable for being sunk substantially vertically into the soil by screw-sinking, the pile comprising an inside wall, an outside wall and a thickness of wall, said pile further comprising:
 at least one helical fin having a flattened shape and a small pitch suitable for causing the pile to be sunk by a few centimeters per turn, when said pile is caused to move in rotation, the helical fin finding itself united mechanically with and in thermal contact with the outside wall of the pile; and   internal partitioning defining an axial compartment and an outer compartment that communicate with each other at the bottom of the pile;   said hollow pile being characterized in that:   the helical fin is in direct thermal contact with the outer compartment through the thickness of outside wall of the pile; and   the outer compartment has a flow section that is significantly smaller than the flow section of the axial compartment.   
   
   
       2 . A vertical pile according to  claim 1 , wherein the outer compartment is provided with a flow section reducer at at least one helical fin. 
   
   
       3 . A vertical pile according to  claim 2 , wherein the flow section reducer is integral with the internal partitioning. 
   
   
       4 . A vertical pile according to  claim 1 , made up of a plurality of segments assembled together in leaktight manner by welding, by inter-fitting, or by screw-fastening, and wherein each segment is provided at its bottom with a helical fin in thermal contact with the outside wall of the pile. 
   
   
       5 . A vertical pile according to  claim 1 , further comprising a top flange plate having through orifices for passing pipes that communicate in leaktight manner with respective ones of the two compartments defined by the internal partitioning, the top flange plate being secured to a floor or to a bottom structure of a building via a link piece provided with through orifices for passing the pipes. 
   
   
       6 . A vertical pile according to  claim 1 , wherein the fluid circulating in the compartments inside the pile is used to feed the primary circuit of a thermodynamic machine of the heat pump type. 
   
   
       7 . A vertical pile according to  claim 1 , wherein the internal partition is partially filled with a substance having the property of changing state at a temperature close to 20° C., and preferably with a substance based on paraffin. 
   
   
       8 . A vertical pile according to  claim 1 , wherein the fluid extracted from the outer compartment is conveyed via pipes to a liquid/air heat exchange unit, said unit itself being connected via pipes to the axial compartment, the assembly that is made up of the outer compartment, of the pipes, of the unit, and of the axial compartment forming a leaktight and sealed circuit further comprising at least one circulator. 
   
   
       9 . A vertical pile according to  claim 8 , wherein the unit passes the replacement air feeding the building of which said pile constitutes part of the foundations. 
   
   
       10 . An installation for heating, conditioning, treating or pre-treating air, said installation including at least one vertical pile according to  claim 1 . 
   
   
       11 . Foundations for an industrial, agricultural, individual or collective residential, or leisure building, said foundations including at least one vertical pile according to  claim 1 .