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Title:
SEED COLLECTING APPARATUS
Document Type and Number:
Japanese Patent JPH04178164
Kind Code:
A
Abstract:

PURPOSE: To obtain a seed collecting apparatus which ensures good seed collecting performance and can keep high efficiency as a whole by providing a change-over valve to an incoming rare gas piping connected to a cooling device and an outgoing rare gas piping extended from the cooling device in order to prevent settling and deposition of seed.

CONSTITUTION: When a certain kind of rare gas flows within a cooling device 8 from the one end 13 to the another end 14, a terminal 13 is set in a high temperature and the end 14 is set within a low temperature. At the end 14, the rare gas is set to about 64° or less and a seed (callium) is condensed and starts to be settled and deposited at the outside of pipe. Here, two 3-way valves 10, 11 are switched by a control apparatus 12 to inverse the flowing directin of the rare gas in the cooling device 8. Thereby, the end 14 is set to a higher temperature, while the end 13 to a lower temperature. As a result, the seed (callium) which has started to be settled and deposited starts to be dissolved, partly dropping and partly revaporizing.


Inventors:
Ishimura, Masafumi
Application Number:
JP1990000302726
Publication Date:
June 25, 1992
Filing Date:
November 09, 1990
Export Citation:
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Assignee:
TOSHIBA CORP
International Classes:
H02K44/08; (IPC1-7): H02K44/08



 
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