Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
WATER SUPPLY DEVICE, AND METHOD OF OPERATING WATER SUPPLY DEVICE
Document Type and Number:
Japanese Patent JP2014062505
Kind Code:
A
Abstract:

To provide a water supply device in which starting frequencies of pumps are managed to a prescribed value, and a wasteful operation is excluded while equalizing operation loads in operating the plurality of pumps.

A water supply device in which a pump is continuously and forcibly operated on the basis of a forcible operation time variably set in a timer even when pump stop conditions are satisfied, includes: a cycle time setting portion for setting a time of one cycle of a pump operation; a calculating portion for subtracting a stop time just before the pump operation, and a remaining time when the operation time just before the pump operation is over the cycle time, from the set cycle time; and timer setting means setting 0 when a value of the result of the subtraction is negative, and setting the value when the value of the result of the subtraction is positive, as the forcible operation time.


Inventors:
SATO KOICHI
OKAFUJI HIROSHI
TOMITA TOSHIO
Application Number:
JP2012208467A
Publication Date:
April 10, 2014
Filing Date:
September 21, 2012
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
HITACHI IND EQUIPMENT SYS
International Classes:
F04B49/02; F04B49/06; F04D15/00
Domestic Patent References:
JPH03206390A1991-09-09
JP3011335B22000-02-21
JPH09228961A1997-09-02
JP2011117347A2011-06-16
JP3076751U2001-04-20
JPH03206390A1991-09-09
JP3011335B22000-02-21
JPH09228961A1997-09-02
JP2011117347A2011-06-16
JP3076751U2001-04-20
Attorney, Agent or Firm:
Polaire Patent Business Corporation



 
Previous Patent: CENTRIFUGAL FLUID MACHINE

Next Patent: BLOWER