FREEZING-OUT TRAP Russian patent published in 2007 - IPC F04B37/08 

FIELD: cryogenic and vacuum engineering.

SUBSTANCE: invention relates to design of freezing-out traps used in vacuum technology. Proposed freezing trap has cylindrical housing accommodating coaxially arranged container with cryogenic liquid and provided with screw ribbing on outer surface. Cylindrical screen is installed with clearance relative to housing wall. Container accommodates rod with screw cut whose tips adjoin cylindrical wall of container, thus forming screw channel for vapors of cryogenic liquid. Vapor and gas mixture getting into trap passes first along surface cooled by outgoing vapors of cryogenic liquid and then along surface cooled directly by cryogenic liquid. Freezing trap features simplified design and effective use of outgoing vapors of cryogenic liquid owing to increased area of surface cooled by vapors of cryogen liquid and change of direction of passing of vapor-gas mixture first along surface cooled by vapors of cryogenic liquid and than along surface cooled by boiling cryogenic liquid.

EFFECT: reduced consumption of cryogenic liquid.

1 dwg