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Title:
PUMP CONTROL METHOD
Document Type and Number:
Japanese Patent JPS62157296
Kind Code:
A
Abstract:

PURPOSE: To smoothly restart a pump by opening the first valve when a predetermined time elapses after the pump detects idle running, opening the second valve to feed water via a priming means, then closing the second and first valves in sequence.

CONSTITUTION: When the water level is lowered and a pump 11 reaches an idle running condition, an idle running preventing pulse which opens an idle running preventive switch via an idle running detector 24 is generated from a control circuit 25, and the operation of the pump 11 is stopped. When a predetermined time elapses via a timer circuit 26, a switch 27 for opening a valve 13 provided at a priming port 12 is closed, then a switch for opening a valve 17 is closed, and water is fed to the pump 11 from a tank 14 via a water fed pipe 18. After a sufficient time to feed water elapses, the switch 28 is opened, the valve 17 is closed, then the valve 13 is closed. Under this condition, a switch 22 is closed, and the pump 11 can be smoothly restarted automatically.


Inventors:
UMEZAWA YASUHIKO
Application Number:
JP29947585A
Publication Date:
July 13, 1987
Filing Date:
December 27, 1985
Export Citation:
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Assignee:
KYOCERA CORP
International Classes:
F04D15/00; F04D9/00; (IPC1-7): F04D9/00; F04D15/00
Domestic Patent References:
JPS5267003A1977-06-03
JP50080001B
JPS61247890A1986-11-05



 
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