VACUUM FREEZE DRYING APPARATUS AND FROZEN PARTICLE MANUFACTURING METHOD

WIPO Patent Application WO/2012/057081

A1

Provided are a vacuum freeze drying apparatus and a frozen particle manufacturing method such that a valve seat in a recovery chamber is protected against the attachment of frozen particles. A vacuum chamber (11) and the recovery chamber (12) are evacuated, and a material liquid is sprayed into the vacuum chamber (11) so as to form frozen particles which are deposited on the surface of a heating-cooling shelf (17). After a first opening (22) of a main pipe (21) which is exposed into the recovery chamber (12) is opened, an auxiliary pipe (31) inserted into the main pipe (21) is moved until a lower end of the auxiliary pipe (31) is positioned outside the main pipe (21) via the first opening (22). Then, the frozen particles on the heating-cooling shelf (17) can be moved into the recovery chamber (12) via the auxiliary pipe (31) without any of the frozen particles attaching to the valve seat (23) surrounding the first opening (22). Thereafter, the auxiliary pipe (31) is moved until the lower end is positioned within the main pipe (21) via the first opening (22), the first opening (22) is closed, and then the frozen particles are unloaded from the recovery chamber (12).

ITO MASAKI (JP)
OOHINATA YOUICHI (JP)
ITO KATSUHIKO (JP)
HANAMOTO TAKASHI (JP)
KINOSHITA TAKAO (JP)

PCT/JP2011/074436

May 03, 2012

October 24, 2011

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ULVAC INC (JP)
ITO MASAKI (JP)
OOHINATA YOUICHI (JP)
ITO KATSUHIKO (JP)
HANAMOTO TAKASHI (JP)
KINOSHITA TAKAO (JP)

B01J2/04; B01D1/18; F26B5/06; A23L3/44

WO2010005015A1

2010-01-14

JP2004232883A	2004-08-19
JP2006090671A	2006-04-06
JPS6083576A	1985-05-11
JP2004232883A	2004-08-19

See also references of EP 2633902A4

ISHIJIMA, Shigeo et al. (JP)
Shigeo Ishijima (JP)

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