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Title:
CONTROLLER FOR NUMBER OF PUMPS
Document Type and Number:
Japanese Patent JPS5525752
Kind Code:
A
Abstract:

PURPOSE: To enable a control of the most suitable number of pumps, by changing discharge of cool and warm water as occasion demands according to a local condition, and by simultaneously determining a change-over of a cool and warm water valve and a control of the number of pumps.

CONSTITUTION: Cool water flown from a cool water forward header CFH is sucked into pumps P1 to P3 through valves CFB1 to CFB3, and cool water being discharged flows to a cool water piping passage CFP through valves B1 to B3 and also flows to a warm water piping passage WFP through valves B4 to B6. A controller CONT for the number of pumps inputs operating condition signals of signal air conditioners AC1, AC2 and pumps P1 to P3 and changing-over condition signals of valves CB1, CB2, BB1 to BB2, B1 to B6 which are detected by a cool water discharge detector CDFT and a warm water discharge detector WDET. According to the input, the optional number of the pumps P1 to P3, which should start or stop running, are controlled, and cool-warm water change-over signals of the pumps P1 to P3 (signals for changing-over to CFB1 or WFB1) are outputed.


Inventors:
OGAWA TOSHIAKI
Application Number:
JP9865578A
Publication Date:
February 23, 1980
Filing Date:
August 15, 1978
Export Citation:
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Assignee:
TOKYO SHIBAURA ELECTRIC CO
International Classes:
F24F11/02; F04B49/02; F04B49/06; F24F5/00; (IPC1-7): F04B49/02; F24F5/00



 
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