Water supply control method without external sensor

A technology of external sensor and control method, applied in the direction of electric fluid pressure control, pump control, water supply device, etc., can solve problems such as increasing difficulty and cost, incomplete discharge of pipeline air, and easy leakage of water at the connection between sensor and pipeline. , to improve reliability, reduce procurement and maintenance costs

Inactive Publication Date: 2015-04-29
WOLONG ELECTRIC GRP CO LTD +1
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Problems solved by technology

Since the external sensor is sensitive to ambient temperature and humidity, water leakage is prone to occur at the connection between the sensor and the pipeline, and the air in the pipeline is not completely discharged. In order to ensure the normal use of the sensor, regular maintenance is required during daily use, which greatly reduces The reliability of traditional energy-saving water supply systems significantly increases the difficulty and cost of later maintenance

Method used

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  • Water supply control method without external sensor
  • Water supply control method without external sensor

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Embodiment Construction

[0022] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0023] The present invention comprises the following steps: as image 3 as shown,

[0024] 1) Establish a database, store the corresponding relationship table between lift and flow, the corresponding relationship table between the detected power of the frequency converter and the flow in the database;

[0025] 2) Obtain the detection power of the inverter. The detection power of the inverter is obtained through the following two methods: one is to sample the bus voltage and bus current, and the power is equal to the product of the bus voltage and the bus current; the other is to sample the torque current Sampling, power is equal to the product of torque current, torque constant and speed;

[0026] 3) According to the detected power of the frequency converter, query the database to obtain the current flow value, and obtain the corre...

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Abstract

The invention discloses a water supply control method without an external sensor, and relates to a water supply control method. At present, periodic maintenance is required in a daily use process in order to ensure normal use of the sensor, thereby greatly lowering the reliability of the conventional energy-saving water supply system and remarkably increasing the difficulty and cost of subsequent maintenance. The water supply control method comprises the following steps: (1) establishing a database, and storing a corresponding relation table of lift and flow and a corresponding relation table of the detection power and flow of a frequency converter in the database; (2) acquiring the detection power of the frequency converter; (3) inquiring the current flow value of the database according to the detection power of the frequency converter and acquiring a corresponding current lift value according to the current flow value; (4) performing water supply control according to a selected water supply way, wherein water supply ways comprise constant-pressure water supply, constant-flow water supply and proportional water supply. Through the technical scheme, a plurality of problems in the application of the external sensor are solved, the purchasing and maintaining costs of a system are reduced, and the reliability of the system is remarkably enhanced.

Description

technical field [0001] The invention relates to a water supply control method, in particular to a water supply control method without an external sensor. Background technique [0002] In the field of energy-saving water supply, there are usually three water supply control methods: constant pressure, constant flow, and proportional. In the constant pressure water supply control, the pressure sensor installed on the water pump outlet is generally used for pressure feedback. After receiving the pressure signal, the frequency converter performs pressure closed-loop control through the internal PID regulator, and then adjusts the pump speed to maintain constant pressure control. The goal. In the constant current water supply control, the flow sensor installed on the pump outlet is generally used for flow feedback. After receiving the flow signal, the frequency converter performs flow closed-loop control through the internal PID regulator, and then adjusts the pump speed to maint...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E03B11/16G05D16/20G05D7/06
CPCF04B49/06
Inventor 齐斌廉晨龙冯芬季似宣
Owner WOLONG ELECTRIC GRP CO LTD
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