Intelligent water supply device and intelligent water supply method
An intelligent water supply and water pressure technology, which is applied in the direction of water supply devices, configuration of water supply pools, water supply main pipelines, etc., can solve problems such as frequent start and stop of frequency converters and water pumps, and reduce the normal service life of equipment, so as to achieve start and stop The effect of optimizing the control mode and prolonging the normal service life
Active Publication Date: 2017-03-15
CHANGSHU SWITCHGEAR MFG CO LTD (FORMER CHANGSHU SWITCHGEAR PLANT)
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Problems solved by technology
[0004] In the actual use environment, the start and stop control methods of the above-mentioned inverters often easily lead to frequent startup and shutdown of the inverter and the water pump, which will reduce the normal service life of the equipment
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[0031] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:
[0032] by figure 1 The intelligent water supply device shown is taken as an example, assuming that it adopts the existing automatic start-up control scheme of the frequency converter, that is, the control unit compares the sampling value P of the discharge side water pressure obtained by the pressure detection device 4 with the preset start-up water pressure threshold P min In comparison, once it is detected that the discharge side water pressure sampling value P is lower than P min (or the water pressure sampling value P on the discharge side is lower than P min state reaches a preset period of time), then control the frequency converter to start, and then drive the water pump to start running.
[0033] However, after a lot of research, it is found that there is a phenomenon in the actual use of the intelligent water supply device using the above sc...
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The invention discloses an intelligent water supply device. A method for controlling start and stop of a frequency converter by the intelligent water supply device comprises the following steps of: keeping for a period T1 when a hydraulic sampling value on a draining side is less than a preset first starting hydraulic threshold value, starting the frequency converter if the hydraulic sampling value on the draining side does not exceed a preset second starting hydraulic threshold value in a subsequent period T2, otherwise not starting the frequency converter; controlling the frequency converter to be stopped if the hydraulic sampling value on the draining side is higher than a preset shutting hydraulic threshold value and is kept for a period T3 or the running frequency of the frequency converter is less than a preset minimum running frequency and is kept for a period T4; and keeping the first starting hydraulic threshold value to be less than the second starting hydraulic threshold value, and the second starting hydraulic threshold value to be less than the shutting hydraulic threshold value. The invention further discloses an intelligent water supply method. According to the method, the mode for controlling starting and shutting of the frequency converter can be optimized, and the normal service life of equipment can be prolonged to a certain extent.
Description
technical field [0001] The invention relates to an intelligent water supply device and method. Background technique [0002] Using inverter-driven water pumps to boost water supply for back-end users has increasingly become the main way of production and domestic water supply. This water supply method usually adopts the inverter control strategy of constant pressure water supply, that is, the water pressure on the water outlet side of the pump is kept constant. The goal is to perform PI or PID control on the inverter. For example, in the printing and dyeing industry, water vapor and water are two essential elements. In order to save energy and reduce costs, enterprises usually build a water storage tank to recycle the used water vapor. At this time, the liquefied water recovered in the storage tank has a certain temperature. In some processes, these recycled High quality water not only has good water quality, but also can reduce the energy consumption of water heating. Of ...
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IPC IPC(8): E03B7/07E03B11/16
CPCE03B7/075
Inventor 唐雪峰顾鸣刚张波
Owner CHANGSHU SWITCHGEAR MFG CO LTD (FORMER CHANGSHU SWITCHGEAR PLANT)