COLD ACCUMULATION DEVICE Russian patent published in 2007 - IPC E02D3/115 

FIELD: improving or preserving soil or rock by thermal, electrical or electro-chemical means, particularly by freezing.

SUBSTANCE: cold accumulation device comprises casing pipe filled with coolant. The casing pipe includes evaporator submersed in ground and condenser comprising condensing zones A and B. Compression-and-condensing unit is arranged over condenser and connected with pipeline through pressure and discharge lines. The pipeline is made as tube of elliptic cross-section wound on tube having D₁ diameter. Casing pipe has variable cross-section so that lower evaporator part L having diameter D is located in down casing pipe part and is brought in direct contact with ground. Remainder evaporator part L₁ has diameter D₁, wherein D>D₁. Space defined by D-D₁ difference is filled with air.

EFFECT: improved economical efficiency and performance, increased manufacturability and extended functional capabilities.

1 dwg