DRAFT CHAMBER

Japanese Patent JP2017064607

A

PROBLEM TO BE SOLVED: To provide a draft chamber which can prevent the leakage of air and the like in a work chamber from a draft chamber whole surface door to the outside due to rapid opening/closing of an open/close door, by preventing the open/close door from opening/closing at a speed faster than variable speed of driving of a damper motor opening/closing a damper provided on an exhaust duct.SOLUTION: A draft chamber is composed of a body which has an opening portion on a front surface of a work chamber; an open/close door which opens/closes the opening portion of the body in a vertical direction; a door provided oppositely to the open/close door; an open/close door lifting/lowering motor which lifts/lowers the open/close door; an open/close lifting/lowering value setting switch which operates the open/close door lifting/lowering motor; an open/close door lifting/lowering electromagnetic switch provided between the open/close door lifting/lowering motor and the open/close door lifting/lowering switch; an exhaust duct which is connected to the body to communicate the work chamber and outside air; a motor damper composed of a damper provided in the exhaust damper and a damper open/close motor; and an open/close door lifting/lowering electromagnetic switch provided between the open/close door lifting/lowering value setting switch and the damper open/close motor.SELECTED DRAWING: Figure 1

HASEGAWA TSUTOMU
NAKAZAWA MASARU

JP2015191326A

April 06, 2017

September 29, 2015

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SANKI ENG CO LTD

B01L1/00; F24F7/06

JP2003269763A	2003-09-25
JPH08294638A	1996-11-12
JPH1043612A	1998-02-17
JP2012211711A	2012-11-01

Yukio Murata
Suzuki Kisaburo

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