Title:
LIQUID LEVEL CONTROL SYSTEM
Document Type and Number:
Japanese Patent JPH03204706
Kind Code:
A
Abstract:
PURPOSE:To execute the stable liquid level control by constituting the system so that two of a continuous supply pipe and an intermittent supply pipe are provided as supply pipes for supplying a liquid into a tank, the continuous supply pipe executes liquid supply of a prescribed quantity in a state that it is always open, and the intermittent supply pipe executes intermittently the liquid supply by an intermittent supply valve. CONSTITUTION:As supply pipes for supplying a liquid into a tank 2, two of a continuous supply pipe 1 and an intermittent supply pipe 3 are provided, the continuous supply pipe 1 executes liquid supply of a prescribed quantity in a state that it is always open, and the intermittent supply pipe 3 executes intermittently the liquid supply by an intermittent supply valve 5. Accordingly, since the intermittent supply quantity of a liquid can be reduced, the stable liquid level control whose controllability is satisfactory can be executed, while decreasing the number of times of opening and closing of the intermittent supply valve 5 between the prescribed upper limit level and the lower limit level. In such a way, generation of such trouble as a fault, etc., caused by opening and closing of the intermittent supply valve 5 can be prevented, and also, a service life of the intermittent supply valve 5 can be extended.
Inventors:
TAMURA HIROSHI
Application Number:
JP138390A
Publication Date:
September 06, 1991
Filing Date:
January 08, 1990
Export Citation:
Assignee:
TOSHIBA CORP
International Classes:
G05D9/00; (IPC1-7): G05D9/00
Attorney, Agent or Firm:
Takehiko Suzue (3 outside)