METHOD OF PROTECTING ADSORBENT IN CRYOSTAT AND CRYOGENIC PUMP Russian patent published in 1995 - IPC

FIELD: cryogenic engineering. SUBSTANCE: water vapor is separated from mixture to be pumped by their condensation on the condensing surface. Flow of the mixture is controlled upstream of the adsorption zone to provide full condensation of component to be condensed. The adsorption zone are tightly separated from the condensation zone before regeneration of the cryogenic pump. The zones are interconnected after the secondary cooling of the cryogenic pump. Temperature of non- condensed component of the mixture to be pumped upstream of entering the adsorption zone is used for controlling flow of the mixture. The tank for coolant and cooled chamber filled with adsorbent are positioned inside the housing provided with vacuum duct. A part of the vacuum duct is constructed as labyrinth passage and received in the tank for coolant. A movable valving-controlling member of the valve is mounted at the outlet of the chamber inside the space of the vacuum duct. One of the ends of the pipe line is arranged in the zone of the vacuum duct bottom. The other end of the pipe line is brought out of the housing through the valve. A temperature gauge is mounted at the inlet of the chamber. EFFECT: improved design. 3 cl, 2 dwg