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

Water supply device

A technology of water supply device and rotation frequency, applied in the direction of liquid variable capacity machinery, pump control, conversion equipment that can be converted to direct current without intermediate conversion, etc., can solve complex and difficult problems, and prevent excessive rise in pipeline internal pressure Effect

Inactive Publication Date: 2012-05-09
EBARA CORP
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, in the test operation of the inverter of the conventional water supply device, the output pressure may be increased more than necessary to create a burden on the pipeline.
In addition, it is complicated and difficult to safely perform test operation of other pumps while operating other pumps in normal automatic operation.

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
  • Water supply device
  • Water supply device
  • Water supply device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0055] Below, refer to Figure 1 to Figure 5 Embodiments of the water supply device according to the present invention will be described in detail. In addition, in Figure 1 to Figure 5 In , the same symbols are assigned to the same or equivalent structural elements and repeated explanations are omitted.

[0056] figure 1 It is a schematic diagram which shows the water supply apparatus 1 in 1st Embodiment of this invention. Such as figure 1 As shown, the water supply device 1 has two water receiving tanks 2, two pumps 3 connected to each water receiving tank 2 through a pipeline 10, a motor 4 for driving the pump 3, a converter 5 for controlling the rotation frequency of the motor 4, and a control to convert The controller 6 of various equipment including the flow device 5 .

[0057] Each water receiving tank 2 is provided with a water level detector 12 for detecting the water level of the water receiving tank 2 using an electrode rod 12a. The water level detector 12 in ...

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

To provide a water supply device capable of preventing an excessive increase in secondary side pipe internal pressure of the water supply device in test operation. This water supply device 1 has a pump 3, an inverter 5 for variably controlling a rotational frequency of the pump 3, and a control part 6 for controlling the inverter 5. The control part 6 controls the rotational frequency of the pump 3 so that the rotational frequency does not increase to a predetermined value or more in the test operation of the pump 3. The control part 6 sets a maximum rotational frequency in the test operation and a maximum rotational frequency in automatic operation so that the maximum rotational frequency in the test operation of the pump 3 becomes lower than the maximum rotational frequency in the automatic operation.

Description

technical field [0001] The invention relates to a water supply device, in particular to a water supply device which controls a pump to supply water to public houses through a converter. Background technique [0002] For example, in rotary machines such as water supply equipment, pumps are operated at variable speeds by using inverters that convert the frequency and voltage of commercial AC power supplies to arbitrary frequencies and voltages. Since the inverter arbitrarily changes the rotational speed of the motor driving the pump, it can be operated at an optimum rotational speed corresponding to the load of the pump, and energy saving can be realized compared with the case of operating at a rated speed. [0003] Usually, the inverter of such a water supply device can be operated in a test operation mode after maintenance such as replacement of a pump, and can be manually operated at an arbitrary frequency. In the operation of the test operation mode, when water is not use...

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 Patents(China)
IPC IPC(8): F04B49/06H02M5/16
Inventor 平岩广直中岛薰小松崇秀手岛友治中原聪桧垣展宏黑田清志
Owner EBARA CORP