CONTROLLING METHOD FOR RINSING PROCESS IN DRY CLEANING APPARATUS USING FLAMMABLE SOLVENT

Japanese Patent JP3172587

B2

PURPOSE: To make it possible to let a solvent fall down into a cleaning tank without using a pump even when the distillation system is under vacuum condition by a method wherein, when the process is shifted to a rinsing process, a cleaning and drying system and the distillation system are equalized into a uniform pressure by opening an air balance valve and a fresh liq. effluent valve is opened to let a solvent in a fresh liq. tank fall down into a cleaning tank.
CONSTITUTION: When accumulation washing and circulation washing are performed by controlling of a microcomputor, approximately atmospheric pressure is kept in a cleaning and drying system 1 and the pressure is e.g. about -250mmHg in a distillation system. When the process is shifted to a rinsing process under this condition, pressure equalization between the cleaning and drying system 1 and the distillation system 2 is made and a fresh liq. effluent valve 20 is opened by opening an air balance valve 12 by means of a control part 7 of the microcomputor. Both systems are equalized thereby e.g. to -100mmHg to let a cleaning solvent in a fresh liq. tank fall down into a cleaning tank without using a pump. When the liq. level in the cleaning tank reaches a set liq. level, the fresh liq. effluent valve 20 and an air balance valve 12 are closed and vacuum valves 9 and 9' of the distillation system are opened.

Akira Sawada
Kiyonori Kuroki

JP17433192A

June 04, 2001

July 01, 1992

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Tokyo Senboshi Machinery Co., Ltd.

D06F43/08; (IPC1-7): D06F43/08

JP3228800A
JP61179192A
JP3228799A
JP4122401A
JP55128691U

Masami Akimoto

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