Unlock instant, AI-driven research and patent intelligence for your innovation.

Feed pump control system

A technology for control systems and feed pumps, used in water heaters, lighting and heating equipment, fluid heaters, etc., to solve problems such as time-consuming and inability to obtain control characteristics

Inactive Publication Date: 2007-07-11
YOKOGAWA ELECTRIC CORP
View PDF1 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it takes time until the correct pressure is reached, and optimal control characteristics cannot be obtained
[0020] (3) In the case of switching the group of pipeline resistance characteristics, when other control parameters (PID, SV upper and lower limit values, etc.) remain unchanged, the best control characteristics cannot be obtained

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Feed pump control system
  • Feed pump control system
  • Feed pump control system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0076] Hereinafter, the present invention will be described in detail with reference to the drawings. Fig. 1 is a functional block diagram showing an embodiment of a feedwater pump control system to which the present invention is applied. Components that are the same as those in the conventional system described in FIG. 8 are assigned the same symbols, and explanations thereof are omitted. The features of the present invention will be described below.

[0077] In Fig. 1, 13 is a pressure adjustment device, which inputs the measured value P of the pressure sensor 12, and operates the frequency converter 6 of the secondary feed water pump 5 according to the output of the PID operation on the deviation from the pressure set value. 14 is the set value calculation The device inputs the measured value Q of the flow sensor 8 as a variable, and calculates the pressure setting value P1 according to the following formula as in the conventional system.

[0078] P1=K0+K1 Q+K2 Qn

[007...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a control system for water pump, which can control the water pressure of water pump, which transfers the water to the heat exchanger. In the invention, according to the difference of the temperature of water to the heat exchanger and the temperature of water from the heat exchanger, the setting value of water pressure of water pump is adjusted. So the water pressure of water pump is controlled optimally.

Description

technical field [0001] The present invention relates to a feed water pump control system for controlling the operation of a feed water pump that feeds water to a heat exchanger. Background technique [0002] FIG. 8 shows a functional block diagram of an example of a conventional feed water pump control system disclosed in Patent Document 1. As shown in FIG. The primary feed water pump 1 supplies the cold water or warm water from the return header 2 to the primary feed water header 4 via a refrigerator or a heater 3 . [0003] The secondary water supply pump 5 supplies cold water or warm water to the second water supply header 7 from the primary water supply header 4 provided with the inverter 6 . The flow sensor 8 measures the flow rate of cold water or warm water supplied to the return header 2 from the second feed water header 7 via the two-way control valve 9 and the heat exchanger 11 . [0004] The differential pressure sensor 12 measures the differential pressure of t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F24H9/20F24H1/08
Inventor 古月学井上贤一
Owner YOKOGAWA ELECTRIC CORP