Title:
CONTROL DEVICE OF PRESSURIZED WATER FEEDING WATER SUPPLY EQUIPMENT
Document Type and Number:
Japanese Patent JP3224217
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To prevent the situation of causing water cutoff before an engineer arrives at a job site by sufficiently securing time up to water cutoff from giving of a water reduction warning only by adding few parts and changing a circuit.
SOLUTION: A water level in a water receiving tank is detected in three stages by using a level detector LS1 composed of a single common electrode bar E4 and three level detecting electrode bars E1, E2, E3 to respectively generate a full water warning signal, a water shortage warning signal, a force feed pump idle rotation preventive signal and a force feed pump restoring signal. Then, the level detecting electrode bar having the intermediate length is separated from the level detector LS1 to be connected to a newly added level detector LS2, a water reduction warning signal is generated by the output, and an interelectrode electric continuity control means is arranged for forcedly electrically continuing/discontinuing an intermediate length electrode terminal and a common electrode terminal of the existing level detector LS1 so that a force feed pump restoring signal S3 is generated by intermediate length detecting output of the existing level detector LS1.
Inventors:
Ryoichi Fujikawa
Application Number:
JP13004199A
Publication Date:
October 29, 2001
Filing Date:
May 11, 1999
Export Citation:
Assignee:
Tokyu Community Co., Ltd.
International Classes:
E03B11/16; E03B11/00; G05D9/12; (IPC1-7): E03B11/16
Domestic Patent References:
| JP932051A |
Attorney, Agent or Firm:
Shinichi Iizuka