CN110161958A - A kind of single frequency conversion automatic control system and its implementation of no-negative-pressure water supply equipment - Google Patents

Abstract

The invention discloses a kind of single frequency conversion automatic control systems of no-negative-pressure water supply equipment, including PLC, PLC is connected with interlocking control circuit, the PID regulator of frequency converter, pressure transmitter and steady-flow tank, the PID regulator of interlocking control circuit and frequency converter is connected with contactor group, several pressure gauges are equipped between pressure transmitter and steady-flow tank, contactor group connects water pump；The control system includes three-phase electricity L1, L2, L3, and three-phase electricity L1, L2, L3 are connected with the one end circuit breaker Q F1, and the circuit breaker Q F1 other end is connected with circuit breaker Q F2, the contact of relay KM1, the contact relay KM2.It has the advantage that every water pump configures a frequency converter, and configures automatic energy optimization function, using real-time parameter curve tracing system, make full use of the original pressure of tap water to save energy, using multivariable fuzzy control technology.

Description

A kind of single frequency conversion automatic control system and its implementation of no-negative-pressure water supply equipment

Technical field

The present invention is the single frequency conversion automatic control system and its implementation of a kind of no-negative-pressure water supply equipment, belongs to electronics control Technical field processed.

Background technique

Secondary water-supply facility predominantly makes up municipal water supply line pressure deficiency, guarantees to live, lives in high-rise crowd's use Water and set up.It supplies water compared to raw water, the safety and reliability of secondary water-supply is always all by the extensive concern of citizen.Tradition Secondary water-supply equipment all triangular web is used to supply water, water supply network water outlet pressure detecting table acquire water supply network water outlet Mouthful pressure, and be sent to controller, controller is by the water supply network water outlet pressure value received and preset user It is compared with hydraulic pressure force value, the frequency of variable-frequency governor is adjusted according to the difference of the two, to adjust turning for pressure pump Speed makes water system automatic constant-pressure surely in the pressure value of setting: the user that i.e. water supply network water outlet pressure value is less than setting uses When hydraulic pressure force value, controller controls variable-frequency governor and improves frequency, accelerates pump rotary speed, ensures that entire user's pipe network in this way There is sufficient hydraulic pressure at any time, it is consistent with pressure set by user；When water supply network water outlet pressure value is greater than the user of setting When with hydraulic pressure force value, controller, which controls variable-frequency governor, reduces frequency, slows down pump rotary speed and slows down；When water supply network water outlet pressure When force value is more than that the user of setting is very high with hydraulic pressure force value, controller stops variable-frequency governor and reaches to stop the operating of water pump To the purpose of protection equipment.

Current water system has the disadvantage in that

1, do not have automatic energy optimization function；

2, the original pressure of tap water cannot be made full use of, energy consumption is high；

3, frequent start-stop water pump is needed, reduces the service life of pump, wastes electric energy；

4, do not have automatic " suspend mode ", " wake-up " function；

5, do not have failure water pump and cut off function automatically.

Summary of the invention

The technical problem to be solved by the present invention is to against the above deficiency, provide a kind of monotropic frequency of no-negative-pressure water supply equipment certainly Autocontrol system and its implementation, every water pump configure a frequency converter, and configure automatic energy optimization function, using reality When parameter curve tracing system, make full use of the original pressure of tap water to save energy, using multivariable fuzzy control technology, Have the function of that small flow shutdown pressure holding function, automatic " suspend mode " and " wake-up ", failure water pump cut off function automatically.

In order to solve the above technical problems, the invention adopts the following technical scheme:

A kind of single frequency conversion automatic control system of no-negative-pressure water supply equipment, including PLC, PLC are connected with interlocking control circuit, change The PID regulator of PID regulator, pressure transmitter and the steady-flow tank of frequency device, interlocking control circuit and frequency converter, which is connected with, to be connect Tentaculum group, is equipped with several pressure gauges between pressure transmitter and steady-flow tank, contactor group connects water pump；

The control system includes three-phase electricity L1, L2, L3, and three-phase electricity L1, L2, L3 are connected with the one end circuit breaker Q F1, breaker The QF1 other end is connected with circuit breaker Q F2, the contact of relay KM1, the contact relay KM2.

Further, the circuit breaker Q F2 other end is connected with one end of frequency converter, the other end of frequency converter be connected with after Contact one end of electric appliance KM3 and contact one end of relay KM4, the contact other end of relay KM1 and the contact of relay KM3 The other end is connected with the one end thermal protector RJ1, and the contact other end of relay KM2 is connected with the contact other end of relay KM4 There is the one end thermal protector RJ2, ammeter PA1, ammeter are equipped between the contact other end and thermal protector RJ1 of relay KM1 PA1 is connected with current sensor, and ammeter PA2, electric current are equipped between the contact other end and thermal protector RJ2 of relay KM2 Table PA2 is connected with current sensor, and the thermal protector RJ1 other end is connected with motor M1, and the thermal protector RJ2 other end is connected with electricity Machine M2.

Further, single frequency conversion automatic control system further includes PLC, and PLC uses siemens PLC, and PLC includes RELAY OUTPUTS module, MAC ADDRESS ELAN module, 24VDC INPUTS module, 120-240VAC module, ANALOG INPUTES module, ANALOG OUTPUTS module and RS485 X20 module, the 1L foot of RELAY OUTPUTS module, 3L foot is connected with 24V+ power supply, and the DOa.0 foot of RELAY OUTPUTS module is connected with coil one end of relay 1#VO-2, after Another termination 24V- power supply of the coil of electric appliance 1#VO-2, for controlling 1# power frequency, the DOa.1 foot of RELAY OUTPUTS module connects It is connected to coil one end of relay 1#VF-3, another termination 24V- power supply of the coil of relay 1#VF-3, for controlling 1# frequency conversion, The DOa.2 foot of RELAY OUTPUTS module is connected with coil one end of relay 1#VO-4, and the coil of relay 1#VO-4 is another 24V- power supply is terminated, for controlling 2# power frequency, the DOa.3 foot of RELAY OUTPUTS module is connected with the line of relay 1#VF-5 Circle one end, another termination 24V- power supply of the coil of relay 1#VF-5, for controlling 2# frequency conversion, RELAY OUTPUTS module DOa.6 foot is connected with coil one end of relay FA-6, another termination 24V- power supply of the coil of relay FA-6, RELAY The DOb.0 foot of OUTPUTS module is connected with the D14 foot of frequency converter, and the DOb.1 foot of RELAY OUTPUTS module is connected with frequency conversion The D11 foot of device, for controlling the operation of frequency converter, the DOb.2 foot of RELAY OUTPUTS module is connected with the D13 foot of frequency converter, For controlling the reset of frequency converter, the DOb.3 foot of RELAY OUTPUTS module is connected with one end of relay FAU coil, relay Another termination 24V- power supply of device FAU coil, the M foot of RELAY OUTPUTS module connect 24V- power supply.

Further, the 0M foot of the ANALOG OUTPUTS module is connected with the AGND1 foot of frequency converter, ANALOG 0 foot of OUTPUTS module is connected with the AI1 foot of frequency converter, for controlling frequency converter setpoint frequency；

The L+ foot of the ANALOG INPUTES module connects 24V+ power supply, and the M foot of ANALOG INPUTES module connects 24V- power supply, The 0+ foot of ANALOG INPUTES module is inputted for inlet pressure, and the 0- foot of ANALOG INPUTES module connects 24V- power supply, The 1+ foot of ANALOG INPUTES module is inputted for outlet pressure, and the 1- foot of ANALOG INPUTES module connects 24V- power supply, The 1+ foot of ANALOG INPUTES module is inputted for outlet pressure, and the 1- foot of ANALOG INPUTES module connects 24V- power supply, The 2+ foot of ANALOG INPUTES module is used for the input of flow, and the 2- foot of ANALOG INPUTES module connects AI-L-, The 3+ foot of ANALOG INPUTES module connects AI-WD, and the 3- foot of ANALOG INPUTES module connects 24V- power supply, wherein import Pressure is the municipal pressure at equipment importation, and outlet pressure is the outlet pressure after equipment pressurization, and flow is that municipal administration flows into equipment Water supply.

Further, the 1M foot of the MAC ADDRESS ELAN module meets 24V- power supply, MAC ADDRESS ELAN The DIa.0 foot of module is used for 1# current control, and the DIa.1 foot of MAC ADDRESS ELAN module is used for 2# current control, MAC The DIa.3 foot of ADDRESS ELAN module is controlled for voltage, and the DIa.4 foot of MAC ADDRESS ELAN module is connected with electricity The one end R7 is hindered, the DIa.5 foot of another termination 24V+ power supply of resistance R7, MAC ADDRESS ELAN module is used for the control of frequency conversion failure System.

Further, the DIb.0 foot of the 24VDC INPUTS module is connected with knob one end, the connection of the knob other end 24V+ power supply, the DIb.1 foot of 24VDC INPUTS module are connected with the one end thermal protector RJ1, another termination of thermal protector RJ1 24V+ power supply, thermal protector RJ1 are used to carry out the overheating protection of 1# motor, and the DIb.2 foot of 24VDC INPUTS module is connected with The one end thermal protector RJ2, another termination 24V+ power supply of thermal protector RJ2, the overheat that thermal protector RJ2 is used to carry out 2# motor are protected Shield, the DIb.6 foot of 24VDC INPUTS module are connected with YW-HING, and the DIb.7 foot of 24VDC INPUTS module is connected with relay The other end of one end of device STOP-1 normally opened contact, relay STOP-1 normally opened contact connects 24V+ power supply, controls for emergency stop, The DIc.0 foot of 24VDC INPUTS module is connected with one end of the contact relay FY, and the other end of the contact relay FY connects 24V + power supply, is used for liquid level Fault Control, and the DIc.1 foot of 24VDC INPUTS module is connected with one end of the contact relay CY, relay The other end of the contact device CY connects 24V+ power supply, controls for pressure height, water tank pond when wherein liquid level failure refers to variable frequency water supply Liquid level is low, and pressure height is that finger pressure is more than setting value.

Further, the automatic control system further includes fuse FU1, and the one end fuse FU1 connects power supply A phase L1- A, the fuse FU1 other end are connected with one end of relay KA1 normally-closed contact, one end of relay KA1 normally opened contact and knob One end, the knob other end are connected with relay KA1 coil one end, a termination zero-power line of relay KA1 coil, relay The other end of KA1 normally-closed contact is connected with one end of relay KM3 normally-closed contact, the contact relay 1#VF-3 one end, relay The contact 2#VO-4 one end, relay KM2 normally-closed contact one end, the other end of relay KM3 normally-closed contact are connected with relay 1# The contact VO-2 one end, the contact the relay 1#VO-2 other end are connected with relay KM1 coil one end, and relay KM1 coil is another End is connected with the one end thermal protector RJ1, and the thermal protector RJ1 other end is connected with one end of relay STOP-1 normally-closed contact, after Another termination zero-power line of electric appliance STOP-1 normally-closed contact, it is normal that the contact the relay 1#VF-3 other end is connected with relay KM1 Closed contact one end, the relay KM1 normally-closed contact other end connect relay KM4 normally-closed contact one end, relay KM4 normally-closed contact The other end is connected with relay KM3 coil one end, and the relay KM3 coil other end is connected with the one end thermal protector RJ1, relay The contact the 2#VO-4 other end is connected with relay KM4 normally-closed contact one end, and the relay KM4 normally-closed contact other end is connected with relay Device KM2 coil one end, the relay KM2 coil other end are connected with the one end thermal protector RJ2, the connection of the thermal protector RJ2 other end There are one end of relay STOP-1 normally-closed contact, another termination zero-power line of relay STOP-1 normally-closed contact, relay KM2 The normally-closed contact other end is connected with relay KM3 normally-closed contact one end, and the relay KM3 normally-closed contact other end connects relay 2# The contact VF-5 one end, the contact the relay 2#VF-5 other end are connected with relay KM4 coil one end, and relay KM4 coil is another End is connected with the one end thermal protector RJ2, and the other end of relay KA1 normally opened contact is connected with relay 1#VF-3 normally-closed contact one End, the relay 1#VF-3 normally-closed contact other end connect relay KM1 normally-closed contact.The fuse FU1 is also connected with knob The one end SB1, the knob SB1 other end are connected with one end of relay STOP-1 coil, and the other end of relay STOP-1 coil connects Zero-power line is connect, zero-power line is connected with one end of indicator light L1, and the other end of indicator light L1 is connected with the contact relay FAU The other end of one end, the contact relay FAU connects fuse FU1；

The automatic control system further includes fuse FU2, and the one end fuse FU2 connects power supply A phase L1-A, and fuse FU2 is another One end is connected with the one end switch SB4, one end of temperature controller 1, socket one end, and the switch SB4 other end is connected with lamp one end, and lamp is another Termination power zero curve 1, the other end of temperature controller 1 are connected with fan one end, and another termination zero-power line 1 of fan, socket is another Termination power zero curve 1.

Further, the automatic control system further includes 24V power module, and the L foot of 24V power module is connected with PLC The N foot of the L1 foot of middle 120-240VAC module, 24V power module is connected with the N foot of 120-240VAC module in PLC, 24V power supply The L foot and N foot of module are connected with filter one end, and another termination L1-A line of filter and N line, the filter other end are connected with micro- Disconnected one end, micro- disconnected other end connect power supply A phase L1-A, and are connected with micro- disconnected 2 one end, and micro- disconnected 2 other ends connect L-DB line, 24V + V the foot of power module meets 24V+, and is connected with the one end fuse FU3, and the fuse FU3 other end is connected with the 24V+ foot of GPRS, + V the foot of 24V power module meets 24V-, and connects the 24V- foot of GPRS, and 2 feet and 3 feet of GPRS are connected with the RS485 X20 of PLC Module.

Further, the automatic control system further includes touch screen SMART, and the 24V+ foot of touch screen SMART meets 24V+ Power supply, the 24V- foot of touch screen SMART connect 24V- power supply, and automatic control system further includes voltage sensor input PV, voltage sensor 9 feet of input PV are connected with the DIa.3 foot of MAC ADDRESS ELAN module in the one end resistance R3 and PLC, the resistance R3 other end It is connected with 24V+ power supply, voltage sensor inputs 8 feet of PV, 6 feet connect 24- power supply, and 5 feet that voltage sensor inputs PV connect 24+ Power supply, 3 feet that voltage sensor inputs PV connect power supply B phase L2-B, and 1 foot that voltage sensor inputs PV connects power supply C phase L3-C, from Autocontrol system further includes PI1 and PI2, and 9 feet of PI1 are connected with MAC ADDRESS ELAN module in the one end resistance R1 and PLC DIa.0 foot, 9 feet of PI2 are connected with the DIa.1 foot of MAC ADDRESS ELAN module in the one end resistance R2 and PLC, resistance Another termination 24V+ power supply of the R1 other end, resistance R2.

Further, the automatic control system further includes relay FY and relay CY, one end of relay FY coil It is connected with 24V- power supply, the other end connection negative pressure failure of relay FY coil inputs FY-IN, and one end of relay CY coil connects It is connected to 24V- power supply, the other end connection superpressure failure of relay CY coil inputs CY-IN；

The automatic control system further includes relay KA1, and one end of relay KA1 normally opened contact connects frequency conversion 24V power supply 24V-MA, another termination of relay KA1 normally opened contact remove the 24V power supply 24V-DB of terminal, and the one of relay KA1 normally-closed contact 24V+ is terminated, the other end of relay KA1 normally-closed contact removes the 24V power supply 24V-DB of terminal, and the one of relay KA1 normally-closed contact It terminates outlet pressure and inputs AI-OUT1, one end of relay normally open contact scoops out anxious analog quantity AI-MA, relay normally open contact One end exit pressure input AI-OUT, 24V- power supply is connected with the one end resistance R5.

The invention adopts the above technical scheme, compared with prior art, has the following technical effect that

1, system described in this patent is that every water pump of equipment configures a frequency converter, and configures automatic energy optimization function；

When equipment starts, start First variable frequency pump from the low-limit frequency of setting by Frequency Converter Control water pump, needed for equipment calculates Pressure adjusts rate-adaptive pacemaker, and how much is the how many benefits of difference.If user's water consumption increases, output frequency increases, when water pump frequency reaches When " switching frequency " (note: non-50HZ, switching frequency need to calculate in detail according to specific parameters of pump) is not able to satisfy water requirements still, Real-time parameter curve tracing system, which issues after control signal is instructed to PLC, PLC, restarts next variable frequency pump, when second After platform water pump is formally devoted oneself to work, First water pump starts frequency reducing, and then two water pumps are run with frequency, guarantees entire water pump assembly Efficiency highest.User's water consumption continues to increase, then starts third platform water pump with mode.

2, using real-time parameter curve tracing system, the original pressure of tap water is made full use of to save energy；

Equipment utilization water pump can be superimposed the characteristics of intake pressure, using real-time parameter curve tracing system regulation technology, according to The pressure set points of user judge automatically pressure difference in value, difference is how many mend how much, take full advantage of city planting ductwork original 2~ 3 kilograms of pressure can effectively save energy so the type selecting of pump will be less than normal than common frequency conversion equipment power.

3, small flow shuts down pressure holding function；

When user's water consumption is less or does not have user's water (such as night), equipment shuts down pressure maintaining energy conservation automatically into small flow State meets normal water supply when small flow using the water and energy that store in air pressure tank, does not have to frequent start-stop water in this way Pump, to extend the service life of pump, has saved electric energy.

4, automatic " suspend mode ", " wake-up " function；

When municipal administration is cut off the water, the water storage in stable current regulator is used up, equipment enters stoppage protection state, while warning note；When When water meets compressor start up condition, equipment Auto Power On variable frequency starting, converting operation；It when user's pipe network water consumption very little or is zero When, equipment starts small flow pressure maintaining state, water pump suspend mode automatically, and equipment reaches energy-efficient purpose by above functions.

5, multivariable fuzzy control technology；

The equipment moment detects self-operating state, it dynamically changes automatic according to each simulation curve changed with water spot water Adjust automatically is adapted to, the operational efficiency optimized is kept, energy-saving effect greatly improves, hence it is evident that equipment operating cost is reduced, with biography Frequency conversion control technique of uniting compares energy conservation 15% or more；

6, failure water pump cuts off function automatically；

When having water pump failure in water pump assembly, micro-controller system can screen automatically, cut off this failure water pump automatically, enable it His reserve pump, and alarm and inform related personnel, it prevents from increasing energy consumption because of failure pump operation.

The present invention is described in detail with reference to the accompanying drawings and examples.

Detailed description of the invention

Fig. 1 is the functional block diagram of single frequency conversion automatic control system in the embodiment of the present invention；

Fig. 2 to Fig. 4 is the schematic diagram of single frequency conversion automatic control system in the embodiment of the present invention；

Fig. 5 is the communication function schematic diagram of single frequency conversion automatic control system in the embodiment of the present invention；

Fig. 6 is the schematic diagram of the implementation method of single frequency conversion automatic control system in the embodiment of the present invention.

Specific embodiment

Embodiment 1, as shown in Figures 1 to 4, a kind of single frequency conversion automatic control system of no-negative-pressure water supply equipment, including PLC, PLC are connected with interlocking control circuit, the PID regulator of frequency converter, pressure transmitter and steady-flow tank, interlocking control electricity The PID regulator of road and frequency converter is connected with contactor group, and several pressure gauges, contact are equipped between pressure transmitter and steady-flow tank Device group connects water pump.

The control system includes three-phase electricity L1, L2, L3, and three-phase electricity L1, L2, L3 are connected with the one end circuit breaker Q F1, open circuit The device QF1 other end is connected with the one end circuit breaker Q F2, contact one end of relay KM1, the contact relay KM2 one end, breaker The QF2 other end is connected with one end of frequency converter, and the other end of frequency converter is connected with contact one end and the relay of relay KM3 Contact one end of KM4, the contact other end of relay KM1 and the contact other end of relay KM3 are connected with thermal protector RJ1 mono- End, the contact other end of relay KM2 and the contact other end of relay KM4 are connected with the one end thermal protector RJ2, relay Ammeter PA1 is equipped between the contact other end and thermal protector RJ1 of KM1, ammeter PA1 is connected with current sensor, relay Ammeter PA2 is equipped between the contact other end and thermal protector RJ2 of device KM2, ammeter PA2 is connected with current sensor, heat The protector RJ1 other end is connected with motor M1, and the thermal protector RJ2 other end is connected with motor M2.

The list frequency conversion automatic control system further includes PLC, and PLC uses siemens PLC, and PLC includes RELAY OUTPUTS module, MAC ADDRESS ELAN module, 24VDC INPUTS module, 120-240VAC module, ANALOG INPUTES module, ANALOG OUTPUTS module and RS485 X20 module, 1L foot, the 3L foot of RELAY OUTPUTS module connect It is connected to 24V+ power supply, the DOa.0 foot of RELAY OUTPUTS module is connected with coil one end of relay 1#VO-2, relay 1# Another termination 24V- power supply of the coil of VO-2, for controlling 1# power frequency, the DOa.1 foot of RELAY OUTPUTS module be connected with after Coil one end of electric appliance 1#VF-3, another termination 24V- power supply of the coil of relay 1#VF-3, for controlling 1# frequency conversion, RELAY The DOa.2 foot of OUTPUTS module is connected with coil one end of relay 1#VO-4, another termination of the coil of relay 1#VO-4 24V- power supply, for controlling 2# power frequency, the DOa.3 foot of RELAY OUTPUTS module is connected with the coil one of relay 1#VF-5 End, another termination 24V- power supply of the coil of relay 1#VF-5, for controlling 2# frequency conversion, the DOa.6 of RELAY OUTPUTS module Foot is connected with coil one end of relay FA-6, another termination 24V- power supply of the coil of relay FA-6, RELAY OUTPUTS mould The DOb.0 foot of block is connected with the D14 foot of frequency converter, and the DOb.1 foot of RELAY OUTPUTS module is connected with the D11 foot of frequency converter, For controlling the operation of frequency converter, the DOb.2 foot of RELAY OUTPUTS module is connected with the D13 foot of frequency converter, becomes for controlling The reset of frequency device, the DOb.3 foot of RELAY OUTPUTS module are connected with one end of relay FAU coil, relay FAU coil Another termination 24V- power supply, the M foot of RELAY OUTPUTS module connects 24V- power supply.

The 0M foot of the ANALOG OUTPUTS module is connected with the AGND1 foot of frequency converter, ANALOG OUTPUTS module 0 foot be connected with the AI1 foot of frequency converter, for controlling frequency converter setpoint frequency.

The L+ foot of the ANALOG INPUTES module connects 24V+ power supply, and the M foot of ANALOG INPUTES module meets 24V- The 0+ foot of power supply, ANALOG INPUTES module is inputted for inlet pressure, and the 0- foot of ANALOG INPUTES module meets 24V- The 1+ foot of power supply, ANALOG INPUTES module is inputted for outlet pressure, and the 1- foot of ANALOG INPUTES module meets 24V- The 1+ foot of power supply, ANALOG INPUTES module is inputted for outlet pressure, and the 1- foot of ANALOG INPUTES module meets 24V- Power supply, the 2+ foot of ANALOG INPUTES module are used for the input of flow, and the 2- foot of ANALOG INPUTES module connects AI- The 3+ foot of L-, ANALOG INPUTES module connects AI-WD, and the 3- foot of ANALOG INPUTES module connects 24V- power supply, wherein Inlet pressure is the municipal pressure at equipment importation, and outlet pressure is the outlet pressure after equipment pressurization, and flow is municipal inflow The water supply of equipment.

The 1M foot of the MAC ADDRESS ELAN module connects 24V- power supply, MAC ADDRESS ELAN module DIa.0 foot is used for 1# current control, and the DIa.1 foot of MAC ADDRESS ELAN module is used for 2# current control, MAC The DIa.3 foot of ADDRESS ELAN module is controlled for voltage, and the DIa.4 foot of MAC ADDRESS ELAN module is connected with electricity The one end R7 is hindered, the DIa.5 foot of another termination 24V+ power supply of resistance R7, MAC ADDRESS ELAN module is used for the control of frequency conversion failure System.

The DIb.0 foot of the 24VDC INPUTS module is connected with knob one end, and the knob other end connects 24V+ power supply, The DIb.1 foot of 24VDC INPUTS module is connected with the one end thermal protector RJ1, another termination 24V+ power supply of thermal protector RJ1, heat Protector RJ1 is used to carry out the overheating protection of 1# motor, and the DIb.2 foot of 24VDC INPUTS module is connected with thermal protector RJ2 One end, another termination 24V+ power supply of thermal protector RJ2, thermal protector RJ2 are used to carry out the overheating protection of 2# motor, 24VDC The DIb.6 foot of INPUTS module is connected with YW-HING, and the DIb.7 foot of 24VDC INPUTS module is connected with relay STOP-1 The other end of one end of normally opened contact, relay STOP-1 normally opened contact connects 24V+ power supply, controls for emergency stop, 24VDC The DIc.0 foot of INPUTS module is connected with one end of the contact relay FY, and the other end of the contact relay FY connects 24V+ power supply, For liquid level Fault Control, the DIc.1 foot of 24VDC INPUTS module is connected with one end of the contact relay CY, relay CY touching The other end of point connects 24V+ power supply, controls for pressure height, and water tank pit level is low when wherein liquid level failure refers to variable frequency water supply, Pressure height is that finger pressure is more than setting value.

The automatic control system further includes fuse FU1, and the one end fuse FU1 connects power supply A phase L1-A, fuse The FU1 other end is connected with one end and knob one end of one end of relay KA1 normally-closed contact, relay KA1 normally opened contact, knob The other end is connected with relay KA1 coil one end, a termination zero-power line of relay KA1 coil, relay KA1 normally-closed contact The other end be connected with one end of relay KM3 normally-closed contact, the contact relay 1#VF-3 one end, the contact relay 2#VO-4 one End, relay KM2 normally-closed contact one end, the other end of relay KM3 normally-closed contact are connected with the contact relay 1#VO-2 one end, The contact the relay 1#VO-2 other end is connected with relay KM1 coil one end, and the relay KM1 coil other end is connected with Thermal protection The one end device RJ1, the thermal protector RJ1 other end are connected with one end of relay STOP-1 normally-closed contact, and relay STOP-1 is normally closed Another termination zero-power line of contact, the contact the relay 1#VF-3 other end are connected with relay KM1 normally-closed contact one end, relay The device KM1 normally-closed contact other end connect relay KM4 normally-closed contact one end, the relay KM4 normally-closed contact other end be connected with after Electric appliance KM3 coil one end, the relay KM3 coil other end are connected with the one end thermal protector RJ1, and the contact relay 2#VO-4 is another End is connected with relay KM4 normally-closed contact one end, and the relay KM4 normally-closed contact other end is connected with relay KM2 coil one end, The relay KM2 coil other end is connected with the one end thermal protector RJ2, and the thermal protector RJ2 other end is connected with relay STOP-1 One end of normally-closed contact, another termination zero-power line of relay STOP-1 normally-closed contact, the relay KM2 normally-closed contact other end It is connected with relay KM3 normally-closed contact one end, the relay KM3 normally-closed contact other end connects the contact relay 2#VF-5 one end, The contact the relay 2#VF-5 other end is connected with relay KM4 coil one end, and the relay KM4 coil other end is connected with Thermal protection The one end device RJ2, the other end of relay KA1 normally opened contact are connected with relay 1#VF-3 normally-closed contact one end, relay 1#VF- The 3 normally-closed contact other ends connect relay KM1 normally-closed contact.The fuse FU1 is also connected with the one end knob SB1, knob SB1 The other end is connected with one end of relay STOP-1 coil, and the other end of relay STOP-1 coil connects zero-power line, power supply Zero curve is connected with one end of indicator light L1, and the other end of indicator light L1 is connected with one end of the contact relay FAU, relay FAU The other end of contact connects fuse FU1.

The automatic control system further includes fuse FU2, and the one end fuse FU2 connects power supply A phase L1-A, fuse The FU2 other end is connected with the one end switch SB4, one end of temperature controller 1, socket one end, and the switch SB4 other end is connected with lamp one end, Another termination zero-power line 1 of lamp, the other end of temperature controller 1 are connected with fan one end, and another termination zero-power line 1 of fan is inserted Another termination zero-power line 1 of seat.

The automatic control system further includes 24V power module, and the L foot of 24V power module is connected with 120- in PLC The N foot of the L1 foot of 240VAC module, 24V power module is connected with the N foot of 120-240VAC module in PLC, 24V power module L foot and N foot are connected with filter one end, another termination L1-A line of filter and N line, and the filter other end is connected with micro- disconnected one End, micro- disconnected other end connect power supply A phase L1-A, and are connected with micro- disconnected 2 one end, and micro- disconnected 2 other ends connect L-DB line, 24V power supply + V the foot of module meets 24V+, and is connected with the one end fuse FU3, and the fuse FU3 other end is connected with the 24V+ foot of GPRS, 24V + V the foot of power module meets 24V-, and connects the 24V- foot of GPRS, and 2 feet and 3 feet of GPRS are connected with the RS485 X20 mould of PLC Block.

The automatic control system further includes touch screen SMART, and the 24V+ foot of touch screen SMART connects 24V+ power supply, is touched The 24V- foot of screen SMART connects 24V- power supply, and automatic control system further includes voltage sensor input PV, and voltage sensor inputs the 9 of PV Foot is connected with the DIa.3 foot of MAC ADDRESS ELAN module in the one end resistance R3 and PLC, and the resistance R3 other end is connected with 24V + power supply, voltage sensor inputs 8 feet of PV, 6 feet connect 24- power supply, and 5 feet that voltage sensor inputs PV connect 24+ power supply, voltage 3 feet of sensing input PV connect power supply B phase L2-B, and 1 foot that voltage sensor inputs PV connects power supply C phase L3-C, automatically controls system System further includes PI1 and PI2, and 9 feet of PI1 are connected with the DIa.0 of MAC ADDRESS ELAN module in the one end resistance R1 and PLC Foot, 9 feet of PI2 are connected with the DIa.1 foot of MAC ADDRESS ELAN module in the one end resistance R2 and PLC, and resistance R1 is another End, another termination 24V+ power supply of resistance R2.

One end of the relay FY coil is connected with 24V- power supply, and the other end of relay FY coil connects negative pressure failure FY-IN is inputted, one end of relay CY coil is connected with 24V- power supply, and the other end connection superpressure failure of relay CY coil is defeated Enter CY-IN.

One end of the relay KA1 normally opened contact connects frequency conversion 24V power supply 24V-MA, relay KA1 normally opened contact It is another to terminate the 24V power supply 24V-DB for removing terminal, a termination 24V+ of relay KA1 normally-closed contact, relay KA1 normally-closed contact The other end remove the 24V power supply 24V-DB of terminal, one end exit pressure of relay KA1 normally-closed contact inputs AI-OUT1, after One end of electric appliance normally opened contact scoops out anxious analog quantity AI-MA, and one end exit pressure of relay normally open contact inputs AI-OUT, 24V- power supply is connected with the one end resistance R5.

One termination CLOSE-1 of the relay FA-5 normally opened contact, a termination OPEN- of relay FA-5 normally-closed contact 1, the other end of relay FA-5 normally opened contact and another termination L-DB of relay FA-5 normally-closed contact, CLOSE-1 represent electricity Dynamic valve is closed, and OPEN-1 represents motor-driven valve opening, and L-DB represents terminals POWER.

For the reliability service for ensuring system, control circuit design has perfect safeguard measure first, to each main pump motor Power frequency and converting operation contactor carry out interlocking, forbid the output of frequency converter to terminate on power frequency supply;Secondly, frequency converter It is that interlocking is also carried out to the converting operation mode of each motor for this by single motor capacity configuration;Again, in PLC output end The isolation between strong, weak electricity is realized by intermediate relay between son and ac contactor coil, light is used in order circuit It is electrically isolated, electrothermal relay and air switch etc. is set in main circuit and are used for electric motor protecting

Water system has Full-automatic variable-frequency, variable, double constant-pressure operations, automatic power frequency operation, remote manual control and live hand The major functions such as dynamic control.Full-automatic variable-frequency constant-pressure operation is the normal operation mode of system；System is transferred to when frequency converter failure Automatic power frequency operation, is a kind of constant speed pump way of supplying water, a kind of Emergency water supply scheme when as the system failure；On-site manual is permanent Voltage-controlled system is mainly used for operation when maintenance, debugging and PLC failure；Remote manual control is by the logical of computer and PLC The reliable existing long-range control to water pump operation.System is carried out the switching of water pump service position by " first at first stopping " principle, is guaranteed In period regular hour, each water pump equilibrium operating mutual backup.Water-delivery pump all has solely on the Functional Design of control system Vertical control function mutual backup, for equipment when working barrel breaks down, stand-by pump can automatically engage operation, both may be used between each other It, can also be with independent control under manual control mode to realize any combination interlocked control under automatic control mode.

1, pid control circuit

Pressure setting signal and pressure feedback signal are sent into pid loop adjuster, by pid loop adjuster inside adjuster into After row operation, output gives frequency converter one rotary speed regulating signal, controls the revolving speed of variable frequency pump, general to only have in more water pumps One variable frequency pump.When supply equipment, which is powered, starts to work, variable frequency pump is first started, when pipe network water pressure reaches setting value, frequency converter Output frequency then it is stable it is certain numerically.And when water consumption increases, and hydraulic pressure reduces, this signal is sent by sensor Pid loop adjuster, pid loop adjuster are then sent out one compared with the increased signal of water consumption, are made on the output frequency of frequency converter It rises, the revolving speed of water pump improves, and hydraulic pressure rises, and can realize variable quantity and pressure or double constant pressure water supplies according to actual needs.Equipment starting When, start First variable frequency pump from the low-limit frequency of setting by Frequency Converter Control water pump, pressure needed for equipment calculates adjusts frequency Output, how much is the how many benefits of difference.If water consumption increases very much, the output frequency of frequency converter is set to reach maximum value, when water pump frequency Reach " switching frequency " (note: non-50HZ, switching frequency need to calculate in detail according to specific parameters of pump), cannot still make pipe network water pressure When reaching setting value, pid loop adjuster, which issues after control signal is instructed to PLC, PLC, stops current variable frequency pump, It will be transferred to power frequency when front pump, and then restart next general pump, after second water pump is formally devoted oneself to work, First water pump is opened Beginning frequency reducing, then two water pumps are run with frequency, guarantee entire water pump assembly efficiency highest.User's water consumption continues to increase, then together Mode starts third platform water pump.Conversely, when the output frequency of frequency converter reaches minimum value, then issuing reduction when water consumption is reduced The order of one power frequency motor.

2, sleep mode

System is frequently encountered user's water consumption when running smaller or do not have to water (such as night) situation, for energy conservation, system setting " suspend mode " function that can make water pump break-off, when equipment detects that water consumption is very small, equipment can according to instruction plus It is pressed onto certain pressure setting value, then frequency converter stops working, and water pump stops (in a dormant state), when with user's hydraulic pressure System restarts when power reduces, and whithin a period of time if the number of starts of pump is more than setting value, system exits suspend mode.

3, communication function

The system has and the communication function of computer, and PLC is provided with 485 interfaces, and monitoring computer can be with one or more sets System is communicated, simultaneously can be with whole operating statuses of monitoring device using computer, comprising: electric current, voltage, each water pump fortune Line frequency, revolving speed, tap water municipal administration pressure, the practical pressure of supply water of equipment etc. design parameter, also can control adjustment system All kinds of parameters.If monitoring center apart from equipment farther out, it has not been convenient to carry out that long-distance radio communication can be used when wire communication.

The system is mainly completed by GPRS DTU and commmunication company's GPRS network.DTU mainly completes PLC or RTU Being forwarded with control centre's data transmission for task, while being also the working interface with mobile GPRS network.The entire long-range prison that supplies water Control system consists of three parts as shown in Figure 5: field control part, GPRS data hop, control room data center.Pass through Control module completes the data interaction with GPRS DTU (hereinafter referred to as DTU).DTU timing acquires data, same time control to controller The data that device real-time reception DTU processed is sent complete respective control function.DTU can be forwarded immediately receiving the data that controller is sent To data center.

(1) it includes S7-200 etc. that various controller, which can be used, in live supply equipment controller, and DTU is real-time by each technological parameter DTU communication module is sent the data to by RS-232 serial communication modular after acquisition；Meanwhile it can also be received by the communication module The instruction of control centre.

(2) GPRS data hop pre-enters the fixation IP of data center when configuring to DTU communication module Address, acquisition data command, the call parameters such as acquisition time interval, it is also possible to remotely located relevant parameter.DTU communication After module receives the data that controller is sent, sends these data in the IP address network server that front is arranged, pass through end Mouth mapping is forwarded to data center server.The process of DTU transmission data are as follows: data are sent in China Mobile's GPRS network, so Afterwards using Internet, is finally received in data center by the server of access special line or broadband Dial-up Network, receive clothes Business device completes data processing, writes library, a series of activities such as forwarding.

(3) control room data center is received server and is connect by internet access device by Internet access device The data from each supply equipment are received, and to data analysis and Control.

4, discharge pressure is set automatically

The pressure loss size of the distribution system of water supply is different with the variation of water supply, and the bigger pressure loss of water supply is also bigger, is Reach the requirement not only met user to stable water pressure but also is able to achieve energy-saving target, according to water yield, water pressure value, Discharge pressure is set automatically using the method for fuzzy control, on the basis of constant pressure, if system is without flowmeter, system It is interior to estimate general flow according to the operation conditions of pump, discharge pressure is automatically adjusted according to the size of flow, is realized complete Variable quantity and pressure.

The method of fuzzy control is equipment moment detection self-operating state, it is according to each simulation changed with water spot water Curve and dynamically change it is automatic adapt to adjust automatically, keep the operational efficiency optimized, energy-saving effect greatly improves, hence it is evident that drop Low equipment operating cost, energy conservation is 15% or more compared with traditional frequency conversion control technology.

5, remote alarming function

The purpose of design of equipment is with unattended for principle, just in case breaking down equipment can the preset phone of automatic dialing It notifies maintenance personal, reduces the processing time of failure, guarantee the continuity to supply water.Equipment can set 3 group alarm telephone numbers, such as Fruit equipment can not introduce telephone wire, mobile or connection GSM network can be used, as long as there is the place of signal to realize this function Energy.

As shown in fig. 6, a kind of implementation method of single frequency conversion automatic control system of no-negative-pressure water supply equipment includes following step It is rapid:

Step S101 starts to work, enters step S102 after the completion；

Step S102, system initialization enter step S103 after the completion；

Step S103 monitors whether to need remotely to control, and if desired long-range control, then start remote control module, and continue It monitors whether to need remotely to control, if not needing remotely to control, enters step S104；

Step S104 is monitored whether to owe water level, if owing water level, is then started and owe water level processing module, and return to step S103 enters step S105 if not owing water level；

Step S105, whether failure if frequency converter failure starts automatic power frequency operation module to monitoring frequency converter, and returns and hold Row step S103, if frequency converter not failure, enters step S106；

Step S106, whether failure starts two main pumps of auxiliary pump and runs module, and return and hold monitoring motor if electrical fault Row step S103, if motor not failure, enters step S107；

Step S107, current operating conditions automatically adjust frequency, enter step S108 after the completion；

Step S108, if meet switching condition, if being unsatisfactory for switching condition, return to step S103, otherwise enter step Rapid S109；

Step S109 judges superpressure or under-voltage, if under-voltage, then increases the state modulus of conversion of main pump, and return to step S103 then reduces the condition conversion mould of main pump if superpressure, and returns to step S103.

Description of the invention is given for the purpose of illustration and description, and is not exhaustively or will be of the invention It is limited to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.It selects and retouches Stating embodiment is principle and practical application in order to better illustrate the present invention, and enables those skilled in the art Understand the present invention to design various embodiments suitable for specific applications with various modifications.

Claims (10)

1. a kind of single frequency conversion automatic control system of no-negative-pressure water supply equipment, it is characterised in that: be connected with interlocking including PLC, PLC Control circuit, frequency converter PID regulator, pressure transmitter and steady-flow tank, the PID tune of interlocking control circuit and frequency converter Section device is connected with contactor group, and several pressure gauges are equipped between pressure transmitter and steady-flow tank, and contactor group connects water pump；

The control system includes three-phase electricity L1, L2, L3, and three-phase electricity L1, L2, L3 are connected with the one end circuit breaker Q F1, breaker The QF1 other end is connected with circuit breaker Q F2, the contact of relay KM1, the contact relay KM2.

2. a kind of single frequency conversion automatic control system of no-negative-pressure water supply equipment as described in claim 1, it is characterised in that: described The circuit breaker Q F2 other end is connected with one end of frequency converter, the other end of frequency converter be connected with relay KM3 contact one end and after Contact one end of electric appliance KM4, the contact other end of relay KM1 and the contact other end of relay KM3 are connected with thermal protector The one end RJ1, the contact other end of relay KM2 and the contact other end of relay KM4 are connected with the one end thermal protector RJ2, after Ammeter PA1 is equipped between the contact other end and thermal protector RJ1 of electric appliance KM1, ammeter PA1 is connected with current sensor, Ammeter PA2 is equipped between the contact other end and thermal protector RJ2 of relay KM2, ammeter PA2 is connected with current sense Device, the thermal protector RJ1 other end are connected with motor M1, and the thermal protector RJ2 other end is connected with motor M2.

3. a kind of single frequency conversion automatic control system of no-negative-pressure water supply equipment as described in claim 1, it is characterised in that: described PLC includes RELAY OUTPUTS module, MAC ADDRESS ELAN module, 24VDC INPUTS module, 120-240VAC mould Block, ANALOG INPUTES module, ANALOG OUTPUTS module and RS485 X20 module, the 1L of RELAY OUTPUTS module Foot, 3L foot are connected with 24V+ power supply, and the DOa.0 foot of RELAY OUTPUTS module is connected with coil one end of relay 1#VO-2, Another termination 24V- power supply of the coil of relay 1#VO-2, for controlling 1# power frequency, the DOa.1 foot of RELAY OUTPUTS module It is connected with coil one end of relay 1#VF-3, another termination 24V- power supply of the coil of relay 1#VF-3 becomes for controlling 1# Frequently, the DOa.2 foot of RELAY OUTPUTS module is connected with coil one end of relay 1#VO-4, the coil of relay 1#VO-4 Another termination 24V- power supply, for controlling 2# power frequency, the DOa.3 foot of RELAY OUTPUTS module is connected with relay 1#VF-5 Coil one end, another termination 24V- power supply of the coil of relay 1#VF-5, for controlling 2# frequency conversion, RELAY OUTPUTS mould The DOa.6 foot of block is connected with coil one end of relay FA-6, another termination 24V- power supply of the coil of relay FA-6, RELAY The DOb.0 foot of OUTPUTS module is connected with the D14 foot of frequency converter, and the DOb.1 foot of RELAY OUTPUTS module is connected with frequency conversion The D11 foot of device, for controlling the operation of frequency converter, the DOb.2 foot of RELAY OUTPUTS module is connected with the D13 foot of frequency converter, For controlling the reset of frequency converter, the DOb.3 foot of RELAY OUTPUTS module is connected with one end of relay FAU coil, relay Another termination 24V- power supply of device FAU coil, the M foot of RELAY OUTPUTS module connect 24V- power supply.

4. a kind of single frequency conversion automatic control system of no-negative-pressure water supply equipment as claimed in claim 3, it is characterised in that: described The 0M foot of ANALOG OUTPUTS module is connected with the AGND1 foot of frequency converter, and 0 foot of ANALOG OUTPUTS module is connected with change The AI1 foot of frequency device, for controlling frequency converter setpoint frequency；

The L+ foot of the ANALOG INPUTES module connects 24V+ power supply, and the M foot of ANALOG INPUTES module connects 24V- power supply, The 0+ foot of ANALOG INPUTES module is inputted for inlet pressure, and the 0- foot of ANALOG INPUTES module connects 24V- power supply, The 1+ foot of ANALOG INPUTES module is inputted for outlet pressure, and the 1- foot of ANALOG INPUTES module connects 24V- power supply, The 1+ foot of ANALOG INPUTES module is inputted for outlet pressure, and the 1- foot of ANALOG INPUTES module connects 24V- power supply, The 2+ foot of ANALOG INPUTES module is used for the input of flow, and the 2- foot of ANALOG INPUTES module connects AI-L-, The 3+ foot of ANALOG INPUTES module connects AI-WD, and the 3- foot of ANALOG INPUTES module connects 24V- power supply, wherein import Pressure is the municipal pressure at equipment importation, and outlet pressure is the outlet pressure after equipment pressurization, and flow is that municipal administration flows into equipment Water supply.

5. a kind of single frequency conversion automatic control system of no-negative-pressure water supply equipment as claimed in claim 3, it is characterised in that: described The 1M foot of MAC ADDRESS ELAN module connects 24V- power supply, and the DIa.0 foot of MAC ADDRESS ELAN module is for 1# electricity The DIa.1 foot of flow control, MAC ADDRESS ELAN module is used for 2# current control, MAC ADDRESS ELAN module DIa.3 foot is controlled for voltage, and the DIa.4 foot of MAC ADDRESS ELAN module is connected with the one end resistance R7, and resistance R7 is another 24V+ power supply is terminated, the DIa.5 foot of MAC ADDRESS ELAN module is used for frequency conversion Fault Control.

6. a kind of single frequency conversion automatic control system of no-negative-pressure water supply equipment as claimed in claim 3, it is characterised in that: described The DIb.0 foot of 24VDC INPUTS module is connected with knob one end, and the knob other end connects 24V+ power supply, 24VDC INPUTS mould The DIb.1 foot of block is connected with the one end thermal protector RJ1, another termination 24V+ power supply of thermal protector RJ1, and thermal protector RJ1 is used for The overheating protection of 1# motor is carried out, the DIb.2 foot of 24VDC INPUTS module is connected with the one end thermal protector RJ2, thermal protector Another termination 24V+ power supply of RJ2, thermal protector RJ2 are used to carry out the overheating protection of 2# motor, 24VDC INPUTS module DIb.6 foot is connected with YW-HING, and the DIb.7 foot of 24VDC INPUTS module is connected with the one of relay STOP-1 normally opened contact The other end at end, relay STOP-1 normally opened contact connects 24V+ power supply, controls for emergency stop, 24VDC INPUTS module DIc.0 foot is connected with one end of the contact relay FY, and the other end of the contact relay FY connects 24V+ power supply, is used for liquid level failure Control, the DIc.1 foot of 24VDC INPUTS module are connected with one end of the contact relay CY, and the other end of the contact relay CY connects 24V+ power supply is connect, is controlled for pressure height, water tank pit level is low when wherein liquid level failure refers to variable frequency water supply, and pressure height is finger pressure Power is more than setting value.

7. a kind of single frequency conversion automatic control system of no-negative-pressure water supply equipment as described in claim 1, it is characterised in that: described Automatic control system further includes fuse FU1, and the one end fuse FU1 connects power supply A phase L1-A, the connection of the fuse FU1 other end There are one end of relay KA1 normally-closed contact, one end and knob one end of relay KA1 normally opened contact, the knob other end is connected with Relay KA1 coil one end, a termination zero-power line of relay KA1 coil, the other end connection of relay KA1 normally-closed contact There are one end, the contact relay 1#VF-3 one end, the contact relay 2#VO-4 one end, relay KM2 of relay KM3 normally-closed contact Normally-closed contact one end, the other end of relay KM3 normally-closed contact are connected with the contact relay 1#VO-2 one end, relay 1#VO-2 The contact other end is connected with relay KM1 coil one end, and the relay KM1 coil other end is connected with the one end thermal protector RJ1, heat The protector RJ1 other end is connected with one end of relay STOP-1 normally-closed contact, the other end of relay STOP-1 normally-closed contact Zero-power line is connect, the contact the relay 1#VF-3 other end is connected with relay KM1 normally-closed contact one end, the normally closed touching of relay KM1 The point other end connects relay KM4 normally-closed contact one end, and the relay KM4 normally-closed contact other end is connected with relay KM3 coil One end, the relay KM3 coil other end are connected with the one end thermal protector RJ1, the contact the relay 2#VO-4 other end be connected with after Electric appliance KM4 normally-closed contact one end, the relay KM4 normally-closed contact other end are connected with relay KM2 coil one end, relay KM2 The coil other end is connected with the one end thermal protector RJ2, and the thermal protector RJ2 other end is connected with relay STOP-1 normally-closed contact One end, another termination zero-power line of relay STOP-1 normally-closed contact, the relay KM2 normally-closed contact other end are connected with relay Device KM3 normally-closed contact one end, the relay KM3 normally-closed contact other end connect the contact relay 2#VF-5 one end, relay 2#VF- The 5 contact other ends are connected with relay KM4 coil one end, and the relay KM4 coil other end is connected with the one end thermal protector RJ2, The other end of relay KA1 normally opened contact is connected with relay 1#VF-3 normally-closed contact one end, relay 1#VF-3 normally-closed contact The other end connects relay KM1 normally-closed contact；

The fuse FU1 is also connected with the one end knob SB1, and the knob SB1 other end is connected with the one of relay STOP-1 coil The other end at end, relay STOP-1 coil connects zero-power line, and zero-power line is connected with one end of indicator light L1, indicator light L1 The other end be connected with one end of the contact relay FAU, the other end of the contact relay FAU connects fuse FU1；

The automatic control system further includes fuse FU2, and the one end fuse FU2 connects power supply A phase L1-A, and fuse FU2 is another One end is connected with the one end switch SB4, one end of temperature controller 1, socket one end, and the switch SB4 other end is connected with lamp one end, and lamp is another Termination power zero curve 1, the other end of temperature controller 1 are connected with fan one end, and another termination zero-power line 1 of fan, socket is another Termination power zero curve 1.

8. a kind of single frequency conversion automatic control system of no-negative-pressure water supply equipment as described in claim 1, it is characterised in that: described Automatic control system further includes 24V power module, and the L foot of 24V power module is connected with the L1 of 120-240VAC module in PLC Foot, the N foot of 24V power module are connected with the N foot of 120-240VAC module in PLC, and the L foot and N foot of 24V power module are connected with Filter one end, another termination L1-A line of filter and N line, the filter other end are connected with micro- disconnected one end, and micro- disconnected other end connects Power supply A phase L1-A is met, and is connected with micro- disconnected 2 one end, micro- disconnected 2 other ends connect L-DB line, and+V the foot of 24V power module meets 24V +, and it is connected with the one end fuse FU3, the fuse FU3 other end is connected with the 24V+ foot of GPRS, and+V the foot of 24V power module connects 24V-, and the 24V- foot of GPRS is connected, 2 feet and 3 feet of GPRS are connected with the RS485 X20 module of PLC.

9. a kind of single frequency conversion automatic control system of no-negative-pressure water supply equipment as described in claim 1, it is characterised in that: described Automatic control system further includes touch screen SMART, and the 24V+ foot of touch screen SMART meets 24V+ power supply, the 24V- of touch screen SMART Foot connects 24V- power supply, and automatic control system further includes voltage sensor input PV, and 9 feet of voltage sensor input PV are connected with resistance R3 The DIa.3 foot of MAC ADDRESS ELAN module, the resistance R3 other end are connected with 24V+ power supply, voltage sensor in one end and PLC Input 8 feet of PV, 6 feet connect 24- power supply, the 5 feet connection 24+ power supply of voltage sensor input PV, 3 feet of voltage sensor input PV Connect power supply B phase L2-B, voltage sensor input PV 1 foot connect power supply C phase L3-C, automatic control system further include PI1 and 9 feet of PI2, PI1 are connected with the DIa.0 foot of MAC ADDRESS ELAN module in the one end resistance R1 and PLC, and 9 feet of PI2 connect It is connected to the DIa.1 foot of MAC ADDRESS ELAN module in the one end resistance R2 and PLC, the resistance R1 other end, the resistance R2 other end Connect 24V+ power supply.

10. a kind of single frequency conversion automatic control system of no-negative-pressure water supply equipment as described in claim 1, it is characterised in that: institute Stating automatic control system further includes relay FY and relay CY, and one end of relay FY coil is connected with 24V- power supply, relay The other end connection negative pressure failure of device FY coil inputs FY-IN, and one end of relay CY coil is connected with 24V- power supply, relay The other end connection superpressure failure of CY coil inputs CY-IN；

The automatic control system further includes relay KA1, and one end of relay KA1 normally opened contact connects frequency conversion 24V power supply 24V-MA, another termination of relay KA1 normally opened contact remove the 24V power supply 24V-DB of terminal, and the one of relay KA1 normally-closed contact 24V+ is terminated, the other end of relay KA1 normally-closed contact removes the 24V power supply 24V-DB of terminal, and the one of relay KA1 normally-closed contact It terminates outlet pressure and inputs AI-OUT1, one end of relay normally open contact scoops out anxious analog quantity AI-MA, relay normally open contact One end exit pressure input AI-OUT, 24V- power supply is connected with the one end resistance R5.