Frequency conversion voltage transformation water supply installation according to period of time

Abstract

The invention provides a time-sharing variable-frequency variable-pressure water supply device, which is a closed loop system. The device comprises a pressure transmitter, an intelligent regulator, a frequency converter, a mating motor, a water pump and a water supply pipeline, wherein at least one current division circuit is in parallel connection with a connecting line of the pressure transmitter and the intelligent regulator; each current division circuit consists of a resistor and a pair of output contacts of a programmable time controller, which are in series connection, or consists of a triode in parallel connection with the connecting line of the pressure transmitter and the intelligent regulator, as well as a base voltage control circuit; a base of the triode is connected with the voltage output end of the base voltage control circuit; and the base voltage control circuit consists of a pair of contacts of the programmable time controller and a voltage division circuit which are in series connection. The current division circuit in parallel is automatically turned on or off through the programmable time controller according to preset time, so as to realize the variable-frequency variable-pressure water supply with different water supply pressures in different periods. The device can lower the water supply pressure in a low water peak period by more than 10 percent, and saves about 5 percent of energy throughout one day.

Description

technical field [0001] The invention and a time-divided frequency-variable-pressure water supply device belong to the field of water supply control equipment for water supply and drainage systems. Background technique [0002] The frequency conversion constant pressure water supply system has the characteristics of high automation, low equipment investment, stable and reliable system operation, energy saving and water saving, and convenient operation and control. It is currently widely used in the domestic water supply industry. The transmitter detects the water supply pressure, and the pressure signal is transmitted to the intelligent regulator and the set pressure value for PID analysis. The intelligent regulator outputs a current signal to control the output frequency of the inverter, and the inverter controls the speed of the pump motor to change the water pump. In this way, a closed-loop control loop is formed, so that the water supply pressure at the outlet of the wate...

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Problems solved by technology

Technically, it is not difficult to transmit the pressure signal to the water plant computer room by using wireless network transmission technology, but the structure of the wireless network is complicated, which not only increases the cost and maintenance cost of the system, but also the reliability of the system is lower than that of the frequency conversion constant pressure water supply system. Low

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