A water supply control method without external sensor

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...

AI Technical Summary

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

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