BIMETALLIC GRAVITATIONAL HEAT PIPE Russian patent published in 2016 - IPC F28D15/00 

FIELD: heating.

SUBSTANCE: invention relates to heat-transfer devices, namely to gravitational heat tubes intended mainly for use in cooling soil. Gravitational heat pipe has sealed housing 2 with zones of evaporation, transport zone 3 and condensation zone 4. Housing made with possibility of filling with liquid heat carrier is represented by top and bottom steel cylindrical tube 1, which in condensation zone 4 is enclosed in tube 5 from aluminium alloy with ribs 6. Feature of the gravity-assisted heat pipe is the fact that steel cylindrical pipe 1 is produced by hot galvanizing coating layer 11 on the outer and inner surface 13, and that in zone of condensation 4 tightly contacts with inner surface of tube 5 by its outer surface through layer 11.

EFFECT: technical result consists in preventing blocking of the upper part of the condensation zone uncondensed gases and eliminating factors deteriorating thermal contact between steel cylindrical tube 1 in condensation zone and aluminium ribs 6, as well as in reduction of increase of the effect of these negative factors in time.

1 cl, 2 dwg