Control system and method for non-negative pressure water supply equipment

Abstract

The invention discloses a control system and method for non-negative pressure water supply equipment. The system comprises a water inlet pressure sensor, an electric valve, a flow meter, a first water pump and a water supply controller; the water supply controller is connected with the water inlet pressure sensor, the electric valve and the first water pump; the water supply controller is used for receiving a pressure signal of the water inlet pressure sensor and a flow signal of the flow meter; and when the pressure signal value of the water inlet pressure sensor is larger than a preset first pressure value and the flow signal value of the flow meter is larger than a preset first flow value, the electric valve is controlled to be opened, the first water pump is controlled to be started to work, and the opening degree of the electric valve is controlled to be in positive correlation change along with the signal value of the water inlet pressure sensor. The situation that water utilization of a user is affected due to frequent starting and stopping of the first water pump is avoided, and the service life of the first water pump can be prolonged.

Description

technical field [0001] The invention relates to a control system and method of a non-negative pressure water supply equipment. Background technique [0002] With the widespread use of non-negative pressure water supply equipment, water companies around the world have put forward higher requirements for the application of non-negative pressure water supply equipment. In order to ensure the constant pressure of the municipal tap water pipe network and prevent users from taking too much water, which will affect the water use of other users on the same pipe network, when the equipment is working normally, a limit value will be set for the pressure at the water inlet of the equipment. During the whole operation process, the pressure at the water inlet cannot be lower than the limit value. When the user’s water consumption decreases, once the water inlet pressure is lower than the limit value, the non-negative pressure water supply equipment will stop, but when the user uses water...

AI Technical Summary

Problems solved by technology

In order to ensure the constant pressure of the municipal tap water pipe network and prevent users from taking too much water, which will affect the water use of other users on the same pipe network, when the equipment is working normally, a limit value will be set for the pressure at the water inlet of the equipment. During the whole operation process, the pressure at the water inlet cannot be lower than the limit value. When the user’s water consumption decreases, once the water inlet pressure is lower than the limit value, the non-negative pressure water supply equipment will stop, but when the user uses water again, the inlet When the outlet pressure is higher than the limit value, the non-negative pressure water supply equipment will start again. In this way, if the water consumption of the user is unstable, the water pump of the non-negative pressure water supply equipment will start and stop frequently, affecting the water consumption of the user.

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