CN103362178A

CN103362178A - Water supply system

Info

Publication number: CN103362178A
Application number: CN2013100511074A
Authority: CN
Inventors: 佐藤幸一; 富田敏夫
Original assignee: Hitachi Industrial Equipment Systems Co Ltd
Current assignee: Hitachi Industrial Equipment Systems Co Ltd
Priority date: 2012-04-09
Filing date: 2013-02-16
Publication date: 2013-10-23
Anticipated expiration: 2033-02-16
Also published as: CN103362178B

Abstract

The invention provides a water supply system which can maintain detection for correct water supply pressure, and increase and reduce the number of pump devices according to actual loads. The system comprises n pump devices, current sensors detecting operating current of the pumps, and pressure sensors disposed on discharge sides of the pumps. The pump devices comprise pumps driven by a variable speed control device. The variable speed control device is used to set maximum velocity and minimum velocity of each pump device, and number increasing current and number reducing current of the operating current. The variable speed control device outputs number increasing commands according to water supply load when velocity of a (n-1)th pump is maximum and the operating current reaches the number increasing current, so that the number of the pump devices increases from (n-1) to n. when velocity of a nth pump device is minimum and the operating current reaches the number reducing current, number reducing commands are output, so that the number of the pump devices reduces from n to (n-1).

Description

Water system

Technical field

The present invention relates to arrange the independently water system of running of many pump installations, each pump installation difference.

Background technology

Water supply installation uses the variable speed drive unit that passes through of separately setting or many settings (to use inverter in the situation of driven induction motor, drive in the situation of permanent magnet electric motor and use its special-purpose controller, this controller is also based on inverter) pump installation that drives.

Can enumerate patent documentation 1, patent documentation 2 as the prior art of above-mentioned water supply installation.In the patent documentation 1, consisting of the heavy system of n by the inverter main body of having carried microprocessor, control substrate, pump and motor respectively, and in the autonomous decentralized water supply control system that is consisted of by the interface board that has carried the microprocessors that they share, (1) the control substrate that n is heavy sends instruction from interface board, carries out pressure control by each control substrate.(2) if communication abnormality occurs during power connection, then the initialization process by each control substrate becomes manual operation, occur in the situation of communication abnormality in the running, the operation mode signal (manual operation pattern, close or automatic operation mode) that interface board before the communication abnormality occurs is stored among the EEPROM of control substrate, this pattern is carried out the processing of closing when closing, manually the time, carry out manual processing, automatically the time, carry out automatically and process.(3) occur in the situation of communication abnormality between the control substrate that interface board and n are heavy, each controls substrate is manual operation or the parameter that automatically turns round according to judgement, carries out manual operation or automatically running, and communication abnormality turns round when restoring automatically.(4) occur in the situation of communication abnormality between the control substrate that interface board and n are heavy, the control substrate of communication abnormality is set as than common starting pressure parameter-3m, avoids turning round simultaneously etc.

In the patent documentation 2, consist of the heavy system of n by the inverter main body of having carried microprocessor and control substrate, pump, motor respectively, and possesses the interface board that has carried the microprocessors that they share, in the heavy system of the n of the running of control water supply installation, (1) the control substrate that n is heavy has the main frame of selection or the setup unit of slave, in advance in the control substrate that n is heavy only 1 be set as main frame, other are set as slave, main frame sends the running control instruction from running to other all slaves.(2) carry out the transmission of signal between main frame and the interface board, slave stops the transmission with the signal of interface board.(3) 1 replacement in the slave is set as main frame etc. during hostdown.

Patent documentation 1: TOHKEMY 2009-228649 communique

Patent documentation 2: TOHKEMY 2008-202556 communique

Summary of the invention

In the prior art shown in these patent documentations, install the condition of starting when and stopping when as each and control by the pressure that pressure sensor detects.But, be the slightly situation of microfreeze of correct water system yet there is the detected value of pressure sensor, worry is detected pressures correctly.

In the water system, the water supply volume of family needs correspondingly increase therewith, reduce the operating number of pump installation according to time period (for example morning, the late into the night) of one day and significantly different.During this number of units changes, increase number of units in the morning that load increases, but in the winter time the late into the night, pressure sensor freezed the time, can not detect and the corresponding correct pressure of load.

In addition, carry out the increase of the operating number of pump installation, when reducing, pressure oscillation occur when worrying to switch, require to suppress this change.

So the present invention provides a kind of water system in view of above-mentioned existing problem, in order also to keep in the winter time the detection of correct pressure of supply water, number of units increase, the number of units of carrying out pump installation according to the load of reality reduce.

In addition, in the prior art shown in these patent documentations, when making running burden (running) degree equalization of the heavy system of n (comprising pump, motor, control system), the probability that breaks down simultaneously is higher, worries to safeguard to concentrate on contemporaneity, maintainability variation.In addition, in the prior art, need to control how the to turn round control system (interface board) of control of pump installation to many settings the higher level, in addition, no matter structure for subsequent use and control thereof when needing abnormal in the multiplicated system in any situation, all worry structure, distribution, control complicated, the practician who does not have professional knowledge just can't tackle, and becomes unfavorable at cost.

So the present invention is in view of above-mentioned existing problem, provide a kind of water system of the simple low price of control that has improved maintainability, system architecture and pump running and the method for operation of water system.

The object of the present invention is to provide the method for operation of a kind of water system and water system, in this water system, by the variable-ratio control device and the pump that are equipped with microprocessor, motor consists of drive system, this variable-ratio control device has the authorized pressure setup unit, set the unit of main frame and slave, main frame is replaced setup unit, has its storage part, discharge side setting pressure sensor at this pump, according to for water load n platform pump installation being set, carry out pressure control, so that discharging lateral pressure, the pump that this pressure sensor detects becomes authorized pressure, the n platform pump installation of the variable-ratio control device of cable connection can be turned round, this n platform pump installation turns round alone respectively and pressure control, make the pump that is set as main frame, inverter drive system is than the pump that is set as slave, the inverter system running is more of a specified duration, thereby makes main frame improve maintainability than the fast loss of slave.

The present invention provides a kind of water system in order to solve above-mentioned problem, and it arranges n platform pump installation, the said pump device comprise have microprocessor, the variable-ratio control device of the storage part of each setting value of guidance panel and storage; Pump with this variable-ratio control device driving; Detect the current sensor of the revolution electric current of this pump; With the pressure sensor that the discharge side of this pump possesses, each pump installation is independently running respectively, becomes authorized pressure so that the pump that this pressure sensor detects is discharged lateral pressure, being characterized as of above-mentioned water system:

The number of units of setting the maximum speed of above-mentioned each pump installation and minimum speed, revolution electric current by the aforesaid operations panel increases electric current and number of units reduces electric current, constitute the running that to carry out connecting with cable the n platform pump installation between each pump installation, above-mentioned variable-ratio control device increases instruction or number of units minimizing instruction based on following condition to many pump installation output number of units according to for water load.The number of units increase condition of pump is: n-1 platform pump installation is maximum speed and revolution electric current when reaching number of units and increasing electric current, makes pump installation be increased to the n platform from the n-1 platform.The number of units minimizing condition of pump is: when n platform pump installation becomes minimum speed and revolution electric current and reaches number of units and reduce electric current, make pump installation reduce to the n-1 platform from the n platform.

In addition, provide a kind of water system, it arranges n platform pump installation, the said pump device comprise have microprocessor, the variable-ratio control device of the storage part of each setting value of guidance panel and storage; Pump with this variable-ratio control device driving; Pressure sensor with the discharge side that is installed in this pump, each pump installation is independently running respectively, so that discharging lateral pressure, the pump that above-mentioned pressure sensor detects becomes authorized pressure, in the above-mentioned water system, it is the setup unit that main frame or slave are set that each variable-ratio control device of said n platform pump installation has selection, be set as main frame with 1 in the n platform pump installation in advance by above-mentioned setup unit, other are set as slave, the main frame that is set at first starts when starting conditions is set up, when stop condition or the establishment of number of units minimizing condition, stop at last, when above-mentioned main frame breaks down, by above-mentioned setup unit 1 pump installation replacement in other slaves is set as main frame.

According to the present invention, can set correct number of units increase, number of units to each pump installation and reduce condition, so can carry out the correct number of units control of rule.In addition, according to the number of units of n platform pump installation increase, the setting of condition when number of units reduces, have the effect of the pressure oscillation in the time of can suppressing number of units and change.And then, more easily safeguard.

Description of drawings

Fig. 1 is the pump service performance figure of the pump installation monomer of the embodiment of the invention.

Fig. 2 is the system construction drawing of the same pump installation monomer.

Fig. 3 is the key diagram of the guidance panel of the same pump installation.

Fig. 4 is the function of motion key diagram of the same pump installation.

Fig. 5 is the flow chart of the same expression running control flow.

(A), (B), (C), (D), (E) are that the same number of units increases, number of units reduces the flow chart of processing among Fig. 6.

(A), (B) are the flow charts of the insert handling of the same running control among Fig. 7.

(A), (B) are the same memory map among Fig. 8.

Pump service performance figure when Fig. 9 is the constant speed drive of the same two pumps device.

Figure 10 is the system construction drawing of the pump installation of the same two settings.

Figure 11 is the function of motion key diagram of the same pump installation.

Figure 12 is the flow chart of the same expression running control flow.

(A), (B), (C), (D), (E) are the same flow charts of processing by turns among Figure 13.

(A), (B) are the flow charts of the insert handling of the same running control among Figure 14.

(A), (B) are the same memory map among Figure 15.

Pump service performance figure when Figure 16 is the non-constant speed drive of the same two pump installation.

(A), (B), (C) rotate key diagram among Figure 17.

Symbol description

3,3-1,3-2 ... pump, 4,4-1,4-2 ... motor, 1 ... suction pipe, 2-1～2-2 ... gate valve, 5 ... flap valve, 6 ... feed pipe, 7 ... forbay, 8 ... pressure sensor, 9 ... flow switch, 10,10-1,10-2 ... current sensor, C, C1, C2 ... handling part, CONS, CONS1, CONS2 ... guidance panel (operating portion), INV, INV1, INV2 ... variable speed drive device (inverter), ELB ... residual current circuit breaker, M, M1, M2 ... storage part, It ... the number of units of revolution electric current increases electric current, IG ... the number of units of revolution electric current reduces electric current, Ht ... number of units increases pressure, number of units reduces pressure.

The specific embodiment

(embodiment 1) is used for implementing the embodiment 1 of water system of the present invention with Fig. 1～Figure 10 explanation.

Fig. 1 is the pump service performance figure of the pump installation monomer of the embodiment of the invention, and transverse axis represents the water yield, and the longitudinal axis represents total (pumping) head.Q-H performance curve when herein, curve A represents to make 1 pump with 100% rotating speed (the f1 frequency of corresponding inverter is shown as f1) running.Q-H performance curve when curve E represents to turn round with f4 rotating speed (frequency is shown as f4).Similarly, curve B is to satisfy design load (the water yield, total (pumping) head that the needs side requires.) the Q-H performance curve of water yield Q0, total (pumping) head H00, when turning round with f0 rotating speed (frequency is shown as f0), obtain.Curve C, D are shown as f2 with rotating speed f2(frequency respectively), the f3(frequency is shown as f3) Q-H performance curve during running.

Curve F is the pipe arrangement resistance curve of the valve class that produces in the situation of drawing water with pump, pipe arrangement etc., the desired value when being the discharge lateral pressure of control pump.H4 is the goal pressure of the point of the water yield 0, and the intersection point of Q-H performance curve E represents during with above-mentioned pipe arrangement resistance curve F and pump f4 rotation speed operation.Similarly, the goal pressure when H1 is pump f1 rotation speed operation represents with the intersection point of curve A, curve F.The water yield of this moment is Q1.

Pump installation is along with the change that needs the side water supply volume so that the pressure of supply water that pressure sensor detects reaches goal pressure, be the mode control inverter frequency of above-mentioned resistance curve F.Being referred to as terminal pressure necessarily controls.Certainly, H1, H4 preset as mentioned above and store as parameter.Wherein, in the diagram, with representational curve A (frequency f 1)～curve E(frequency f 4) expression Q-H performance curve, and if on pipe arrangement resistance curve F controlled frequency, then obviously produce the pump performance curve corresponding with this frequency, so can omit.

Starting pressure when in addition, H4 also starts from halted state as pump.That is, in automatically turning round, if being starting pressure H4, the pressure of supply water that pressure sensor detects turns round with next pump, along with the pressure on the change maintenance pipe arrangement resistance curve F of water supply volume supplies water.Few, the described later flow switch of water supply volume detects when few water yield is used state and then stops.

Fig. 2 represents to arrange the system construction drawing of example of the pump installation of 1 playscript with stage directions inventive embodiments.2-1,2-2 are gate valve, and 3 are the pump with motor 4 drivings, and the suction side of this pump is connected with water source one side via suction pipe 1.Water source one side is accepted the supply from total feed pipe under direct-connected mode, not shown herein.Under the water tank mode, accept the supply of water from water tank, not shown herein.5 is flap valve, and 6 is feed pipe, and 7 is forbay and the position near pump that is arranged on feed pipe 6.The 8th, the pressure according to this place that this feed pipe 6 possesses sends the pressure sensor of the signal of telecommunication.Discharge pressure (for example discharge pressure is certain, and the prediction terminal pressure is certain) by this sensor control pump.

And then, need side under the terminal of this feed pipe 6 is direct-connected situation, and need the side feed pipe to be connected such as the water tap to condominium etc. to supply water.In the situation of high level cistern formula, need the side feed pipe to be connected high-level tank water with this.9 is flow switch, detects few water yield and uses state (for example 5～10L/min) to send the signal that stops pump.

INV is the main body that is equipped with the variable speed drive device (inverter) of the microprocessor (not shown) that drives said motor 4, accepts the supply of power supply from mains side via residual current circuit breaker ELB.Variable speed drive device INV supplies with the running driven by power pump 3 of certain frequency to motor 4, the revolution electric current of this moment detects with current sensor built-in in the variable speed drive device.Current sensor is built in the variable speed drive device thereby is not shown, and represents for the ease of understanding the current sensor 10 of installing with the electric power supply line that leads to motor 4 in principle.Current sensor 10 is made of the current transformer that arranges on the electric power supply line that leads to motor 4 shown in the circle frame surrounds, and the current value that detects is in the handling part C(of variable speed drive device INV aftermentioned) in process.

CONS is the guidance panel that arranges among the variable-ratio control device INV, is the setup unit of variable-ratio control device INV.Guidance panel CONS possesses display part, operating portion, and being used for identification when having operation mode (manually, automatically) decision-making function, individual operation (running of the machine), many runnings (running of the n platform that connects with cable) selection function, many runnings of IDNO.(is the machine or the numbering of other devices), be used for that starting stops, the set-up function of pressure controlled parameter etc., these set value and the storage part (for example EEPROM) of the pressure signal that pressure sensor detects, the current signal that current sensor detects etc. to possess storage.

Fig. 3 represents the details of guidance panel CONS, and Fig. 4 represents its function.Among Fig. 3, have display part 30 and operating portion among the guidance panel CONS, possess running (RUN) key 31, stop (STOP) key 32, store (PRG) key 33, upper key (contact-making switch) 34, lower key (contact-making switch) 35, function (FUNC) key 36 and mode key 37.

Mode key 37 switches selection MAN(manual at every turn when being pressed)/AUTO(is automatic) and pattern, the several functions that function key 36 is selected in selecteed each pattern.Function key 36 is also selected in a plurality of functions at every turn when being pressed.When pressing function key 36, between Presentation Function and setting parameter function, switch at every turn.The operation by storage key 33 of the contact-making switch of key 34, lower key 35 in the operation when determining the setting numerical value of various parameters, the setting value of operation is set stores storage part (memory) M into.Wherein, guidance panel CONS can separate with variable-ratio control device INV, also can be one.

Among Fig. 4, when having selected the manual operation pattern, pump installation turns round when pressing RUN key 31, stops when pressing STOP key 32.About inverter frequency, with the pre-stored storage part M that arrives of initial value, when pressing RUN key 31 it is read, in display part 30 demonstrations and with this frequency run.Change more this inverter frequency of new settings when pressing key 34 and lower key 35 at every turn.

When having selected automatic operation mode, pump installation begins automatic running when pressing RUN key 31, stop when pressing STOP key switch 32.Even select automatic operation mode, as long as being starting conditions starting pressure (being set as in advance initial value in parameter) below, pressure of supply water is false, with regard to not entry into service.Above-mentioned starting pressure is set in parameter in advance by the operation of setup unit.Equally, even select automatic operation mode, as long as pressure of supply water is false with first-class stop condition for stopping pressure (being set as in advance initial value in parameter), just do not shut down.The above-mentioned pressure that stops to be set in parameter in advance by the operation of setup unit.

In addition, with the starting pressure of above-mentioned pressure of supply water, to stop pressure corresponding, by manually (MAN) sets respectively the starting operation electric current in advance in parameter, electric current shuts down.

And then, arrange in the situation of many pump installations described later, the number of units that the number of units that set the maximum speed of each pump installation and minimum speed, the number of units during as the number of units that increases pump installation increases the revolution electric current of condition increases electric current, the number of units during as the number of units that reduces pump installation reduces the revolution electric current of condition reduces electric current (with reference to Fig. 8).

Automatically under the operation mode, prepare as shown in Figure 4 the function (FUNC) of individual operation and Duo Tai running.The communication of the variable-ratio control device INV of Fig. 2 becomes individual operation when disconnecting with terminal S2, when communication is connected with cable with terminal S2, allow many running that connects.Wherein, communicate between communication is with terminal S2, no matter this communication is wired, wireless, can connect with the parameter substitution cable.In addition, in the situation of many runnings more than 3, the terminal S2 that the necessity more than 2 is set at variable-ratio control device INV gets final product.

In the setting parameter that is undertaken by FUNC key 36, prepare that authorized pressure setting, frequency setting, host setting, slave are set, main frame candidate's setting, when number of units increases and the order of the slave of number of units when reducing set change parameter when at every turn pressing FUNC key 36.

In authorized pressure and frequency setting, use as mentioned above FUNC key 36 selection pressures or frequency, the operating and setting starting pressure of key 34 and lower key 35 or inverter frequency etc. on passing through when display part 30 shows initial value are with storage key 33 storages.In host setting, the operating and setting by upper key 34 and lower key 35 is as the identiflication number (IDNO.) of the pump installation of main frame, with storage key 33 storages.In slave is set, set the identiflication number of main frame pump installation in addition, with storage key 33 storages.In main frame candidate's slave was set, the situation next but one that the setting main frame breaks down became the identiflication number of the slave of main frame, with storage key 33 storages.

In the situation of above-mentioned many runnings more than 3, be the machine or other devices by identiflication number IDNO. identification.IDNO. preset as above-mentioned parameter, in the situation of n platform, suitably be set as respectively 1,2,3 ... n.For example, IDNO.1 is main frame, and other are slave.In addition, for convenience of explanation, be set as the device of IDNO.1 of main frame when starting conditions is set up, at first entry into service, become many runnings after, also stop at last even stop condition is set up.Wherein, no matter wired this communication is, wireless, can connect with the parameter substitution cable.

Variable speed drive device INV possesses terminal I0, I1 and I2, I3 among Fig. 2, and above-mentioned discharge side pressure sensor 8 is connected with cable S0 with terminal I0, I1, and flow switch 9 is connected with cable S1 with terminal I2, I3.

Fig. 5, Fig. 6, Fig. 7 are the flow charts of the running control flow of expression pump installation, and it carries in the microprocessor of variable-ratio control device INV as program.Fig. 8 is the memory map of storage these parameters etc.

When bringing into use, when connecting mains side residual current circuit breaker ELB shown in Figure 2, program work.At first, when step 500 begins, carry out initial treatment in step 501, set in step 502 execution parameter and process.In initial treatment, carry out register, insert various processing and the communication function initialization process such as vector, memory, stack pointer, whether executive communication port (communication terminal S2) is connected with the determination processing of cable.Not connecting then is individual operation, and the situation of connection then is many runnings.

During setting parameter is processed, set above-mentioned parameter with above-mentioned CONS.Set above-mentioned initial value, the preparation of turning round.Allow to insert in step 503,504, prepare insert handling shown in Figure 7.Certainly, insert the processing after the execution in step 700.

In the INT0 insert handling after step 700, shown in Fig. 7 (A), in step 701, determine whether the key switch of supressing Fig. 2 or Fig. 3.If the result who judges not by the next step 702 that advances to, such as the demonstration of carrying out pressure that initial value determines etc., carries out the RETI processing of returning the processing before inserting from insert handling in step 709.

If the result of determination of step 701 then advances to step 703 for supressing key switch, judge whether parameter modification key of the key switch (Fig. 3) press.Be to advance to step 705 in the situation of parameter modification key, execution parameter is set (expression can be changed) and is processed and to the stores processor (step 706,707) of memory.Its store status is kept among Fig. 8.Like this, the on-stream setting change that also can carry out parameter.

In the INT1 insert handling after step 710, shown in Fig. 7 (B), carry out inspection, the supervision of fault in step 711.The communication terminal S2 that carries out variable-ratio control device INV in step 712 is the judgement that connects or disconnect, and carries out sending and receiving processing in the situation of connection, if be automatic operation mode, then in the TAN/FUK parameter of the memory 103 of Fig. 8 data is set.

For example, if connection cable not on the communication terminal S2 then arranges data 00H.Its expression individual operation is the machine running.If be connected with cable on the communication terminal S2, data 0FFH is set then.Many runnings of its expression are the running of n platform shown in Figure 4.In addition, carry out and the communicating by letter of other devices, running, the state that stops of each among each IDNO. stored into after the memory 114.

In the step 713, the signal of detected pressures sensor, inverter current and frequency will be simulated register AN0(pressure), the AN1(electric current) and the data of current frequency f ANS be saved in respectively among memory M108, M114, M111, M10, M14, the M12.Then, the processing step 714 is returned insertion from insert handling before.

At this moment, operation mode parameter MAN/AUTO is set to MAN namely manually.

In the step 505 of Fig. 5, be judged to be MAN and advance to and return step 505 after step 506 is carried out the manual operation processing.Said manual operation is processed and is referred to herein, turns round when pressing above-mentioned RUN key switch, stops when pressing the STOP key switch, sets the processing of inverter frequency with upper and lower key switch.

Then, the situation of setting or change to AUTO with operation mode parameter MAN/AUTO is described.Being judged to be AUTO and advancing to step 507 of step 505.Determine whether herein and supress the RUN key switch.If for being (YES) then advance to next step 508 and begin automatic running.If for no (NO) then carry out this processing until to become be (YES).In the step 508, carry out the judgement of TAN/FUK, namely be individual operation or the judgement of many runnings, advance to step 511 in the situation of individual operation, advance to step 509 in the situation of many runnings.In step 509, judge that by above-mentioned IDNO. the machine is main frame or slave.The result who judges if main frame then advances to step 511, is that slave then advances to step 510, determines whether herein the running instruction from main frame.There is the running instruction then to advance to step 511, then returns step 508 without the running instruction, carry out processing during this period until the running instruction is arranged.

In step 511, judge that whether pressure of supply water that pressure sensor detects is as below the starting pressure (H4).If for H4 with next advance to step 512 make pump up moving.Then, read goal pressure H0(in step 513,514,515 from storage part and be for the first time initial value H4, play for the second time the goal pressure of upgrading for step 526.), the pressure of supply water that reads pressure of supply water H(reality is the pressure data AN0 that pressure sensor detects, H0=AN0 uses mark H for convenience of explanation in flow chart.), (H and H0) compares to two data.If result relatively is H0+ α＜H then advance to step 516.In the step 516, set as described below low-limit frequency, judge whether the inverter frequency of current running is low-limit frequency.The result who judges if low-limit frequency then advances to step 517, then advances to step 522 if not low-limit frequency.

(establishing method of low-limit frequency) is take the n=2 platform as the example explanation.(with reference to Fig. 9) details after narration, the establishing method of the low-limit frequency when number of units reduces is described herein.1. on 1 pump performance curve and during n platform pump constant speed drive, on the synthetic performance chart of pump, when describing 1 running and pipe arrangement resistance curve F, J during the running of n platform.The intersection point Ht(of the pump performance curve A in highest frequency when running and pipe arrangement resistance curve J as number of units increase, pressure set points when number of units reduces) be that number of units that number of units when making pump installation be increased to 2 from 1 increases condition increases the number of units minimizing pressure that pressure and the number of units when making pump installation reduce to 1 from 2 reduce condition, the water yield corresponding with it is Qt.The revolution electric current of 1 pump installation corresponding with it is maximum current, represents with It.

Among Fig. 9 (aftermentioned), on the pipe arrangement resistance curve F when the running of 1 pump and the intersection point O5 of the straight line that water yield Qt/2 is extended upward, describe pump performance curve K, the frequency f G that satisfies it is low-limit frequency, and the revolution electric current of this moment is IG.Store these Ht, fG into storage part by guidance panel in advance, or computing and setting in the processing of step 516.These setting values Ht, It, IG are stored in advance among memory M50, M52, M53, M117, M119, the M120 as parameter.

Above-mentioned explanation increases and decreases with the pressure representative number of units, but also can use the operation of inverter electric current to replace pressure.Among Fig. 9, line segment M is the current curve when pump installation is turned round with inverter frequency f1, and its intersection I t with the straight line that water yield Qt is extended upward is that number of units increases electric current (being increased to 2 from 1).Equally, line segment L is the current curve when pump installation is turned round with inverter frequency fG, and the intersection I G of the straight line that itself and water yield Qt/2 extend upward is that number of units reduces electric current (reducing to 1 from 2).

Condition when increasing for the number of units of pump installation, when number of units reduces is in the situation of pressure, pressure shares for many pump installations, is uniform pressure so can make the number of units that increases condition as number of units increase pressure and reduce pressure as the number of units that number of units reduces condition.Condition when increasing for the number of units of pump installation, when number of units reduces is in the situation of the revolution electric current of pump installation, because revolution electric current is the revolution electric current of 1 pump installation, needs to determine to observe the revolution electric current of which platform pump installation.

Be the example of n=2 platform in the present embodiment, increase condition as number of units, whether judgement reaches number of units increase electric current in the revolution electric current of the First pump installation that turns round.The maximum value that number of units increases the revolution electric current shown in the pump service performance figure (Fig. 9) that electric current is 1 pump installation is above-mentioned It.On the other hand, reduce condition as number of units, 2 have turned round, and whether the revolution electric current of 1 pump installation of the side that judgement will reduce reaches number of units is reduced electric current.Herein, to reduce the minimum value shown in the pump service performance figure that electric current is 1 pump installation be IG to number of units.That is it is different from number of units minimizing electric current that, the number of units of pump installation increases electric current.

In addition, with n=2 platform explanation, determine or when setting number of units and increasing and pressure, revolution electric current, low-limit frequency when number of units reduce of number of units when reducing and also can use the same method more than 3 in this example.

Return step 517, in step 517, with the above-mentioned judgement of similarly carrying out TAN/FUK, be individual operation or the judgement of many runnings, advance to step 522 in the situation of individual operation and carry out to slow down and process.

Advancing to step 518 execution the machine in the situation of many runnings is main frame or the judgement of slave.The result who judges is if main frame then advances to step 519 and carries out the judgement whether number of units minimizing condition is set up.For being in the situation of (YES), advance to step 520 and send number of units minimizing instruction for slave, advance to step 528.Number of units reduces the order of sending of instruction, for example in the processing of step 519, carries out by the order of running after arrive first.Advance to step 528 in the situation of no (NO).

Said number of units minimizing condition refers to following processing herein.1. the operating condition for the machine (IDNO.1) slave in addition checks by each IDNO., obtains operating number, and the pump installation that therefrom will turn round at first is chosen as and sends the pump that number of units reduces instruction.According to operating number, setting or reading above-mentioned number of units from pre-stored storage part increases pressure, number of units minimizing pressure (sharing when number of units increase, number of units minimizing).Low-limit frequency when similarly, setting or reading number of units and reduce from pre-stored storage part.In addition, set or read number of units from pre-stored storage part and increase electric current, number of units and reduce that electric current (current value is different when number of units increases, when number of units reduces) replaces above-mentioned number of units to increase pressure, number of units reduces pressure.2. inverter frequency becomes low-limit frequency, and pressure of supply water becomes number of units and reduces more than the pressure, or this state is through the stipulated time.3. use number of units shown in Figure 9 to reduce electric current I G and replace number of units to reduce pressure, inverter frequency becomes low-limit frequency, and revolution electric current becomes number of units and reduces below the electric current I G, or this state is through the stipulated time.Above-mentioned 2 and 3 times number of units reduce conditions and all set up, adopt a side who sets up first to set up as number of units minimizing condition.

Return Fig. 6, be judged to be in the result of determination of step 518 in the situation of slave and advance to step 521, carry out whether the judgement that reduces instruction from the number of units of main frame is arranged.For being in the situation of (YES), advance to step 525 execution and stop to process (number of units minimizing), return step 505 and continue processing afterwards.Be judged to be in the situation of no (NO), advance to step 528.

In the step 522, reduce for example 0.1Hz of aHz(from current frequency f) carry out to slow down and process, repeatedly carry out current frequency in step 523 and whether arrive the affirmation processing of instruction frequency until arrive the instruction frequency.In step 524, confirm from flow switch whether the use state of water is few, in the few situation (YES) of the use state of water, carry out in step 525 and to stop to process and returning step 505.Not in the few situation (NO), to advance to step 528, determine whether herein and supress the STOP key.The result who judges carries out and stops to process with the above-mentioned step 525 that similarly advances in the situation about pressing.In the situation about not pressing, return step 513 and continue processing afterwards.

Return Fig. 5, the result that step 515 is judged if H0-α＜=H＜=H0+ α, then the goal pressure of the certain control of the terminal pressure of the use prior art of execution in step 526 is upgraded and is processed.Obtain the method working pressure parameter of goal pressure and arithmetic expression or the table of frequency parameter.Then, upgrade stand-by period processing required and stablize required stipulated time Δ t for pressure of supply water at step 527 performance objective pressure, advance to step 528.

The result of the judgement of step 515 is if H0-is α〉H then advances to step 529.Judge whether current inverter frequency is highest frequency herein.The result who judges, if become highest frequency then advance to step 532, if do not become highest frequency then advance to step 530, the speedup after carrying out is processed.As shown in Figure 6, during the speedup of step 530 is processed, current frequency f is added for example 0.1Hz of aHz() carry out speedup and process, process until arrive the instruction frequency and arrive then advance to step 528 if repeatedly carry out affirmation that whether current frequency arrive the instruction frequency in step 531.

Herein, the frequency f of variable-speed processing is identical with the fxAUTO of memory M109, uses for convenience of explanation f in flow chart 6.In addition, above-mentioned α is the dead band of goal pressure, for example is 1m.

In the step 532 of Fig. 6, herein, with the above-mentioned judgement of similarly carrying out TAN/FUK, be individual operation or the judgement of many runnings, advance to step 530 in the situation for individual operation and carry out speedup and process.Advance to step 533 in the situation of many runnings, carrying out the machine is main frame or the judgement of slave.The result who judges, if main frame then advances to step 534, carrying out number of units increases the judgement whether condition is set up.For being advances to step 535 in the situation of (YES), sending number of units for slave increases instruction, advances to step 528.Sending sequentially for example in the processing of step 534, by the order execution from small to large of the numbering in the next running of number of units increase instruction.Advance to step 528 in the situation for no (NO).

Said number of units increase condition is following processing herein.1. the operating condition for the machine (IDNO.1) slave in addition checks by each IDNO., obtains operating number, therefrom will number less pump installation and elect the pump that next number of units increases (instruction) as.According to operating number, setting or reading above-mentioned number of units from pre-stored storage part increases pressure, number of units minimizing pressure (sharing when number of units increase, number of units minimizing).Highest frequency when similarly, setting or reading number of units and increase from pre-stored storage part.In addition, set or read number of units from pre-stored storage part and increase electric current, number of units and reduce that electric current (current value is different when number of units increases, when number of units reduces) replaces above-mentioned number of units to increase pressure, number of units reduces pressure.2. inverter frequency becomes highest frequency, and pressure of supply water becomes number of units and increases below the pressure, or this state is through the stipulated time.3. use number of units shown in Figure 9 to increase electric current I t and replace number of units to increase pressure, inverter frequency becomes highest frequency, and revolution electric current is that number of units increases more than the electric current I t, or this state is through the stipulated time.Number of units increase condition is all set up in above-mentioned 2 and 3, adopts the one of setting up first to set up as number of units increase condition.

Return Fig. 6, in the result of determination of step 533, be judged to be in the situation of slave and advance to step 536, carry out the judgement that whether has from the running instruction of main frame.The result who judges, for being advances to step 535 in the situation of (YES), sending number of units increases instruction and advances to step 528.In the situation for no (NO), return step 508 and continue processing afterwards.

As mentioned above, the n platform pump installation with same function, performance is set, carries out the constant speed drive under the certain control of terminal pressure, carry out simultaneously the number of units increase and decrease running of the pump installation of n platform setting.

Namely, set maximum speed and the minimum speed of each pump installation by guidance panel, increase electric current and number of units minimizing electric current with the number of units of revolution electric current, the pump installation of the n platform that connects with cable between each pump installation can be consisted of with turning round, the variable-ratio control device is according to supplying water load, when n-1 platform pump installation becomes maximum speed, and when revolution electric current reaches the number of units increase condition of number of units increase electric current, the output number of units increases instruction makes pump installation be increased to the n platform from the n-1 platform, when n platform pump installation becomes minimum speed, and when revolution electric current reached the number of units minimizing condition of number of units minimizing electric current, the output number of units reduces instruction made pump installation be reduced to the n-1 platform from the n platform.

In addition, when the revolution electric current of above-mentioned n-1 platform pump installation and the one in the discharge pressure reach first number of units and increase condition, make pump installation be increased to the n platform from the n-1 platform, when the revolution electric current of above-mentioned n platform pump installation and the one in the discharge pressure reach first number of units and reduce condition, make pump installation reduce to the n-1 platform from the n platform.

According to this structure, increase the one that the conditioned disjunction number of units reduces condition according to reaching first number of units in revolution electric current and the discharge pressure, can carry out number of units and switch, so have the effect that can switch rapidly.

And then the variable-ratio control device INV of all pump installations (device) possess the increase of the number of units of main frame, the handling part of reduce judging and number of units increase, reduce the handling part of instruction, and possess the number of units of slave increase, reduce the handling part that command reception waits for and the increase of carrying out number of units, the handling part of minimizing.These handling parts are expressed as C in the INV of Fig. 2, be expressed as respectively C1, C2 in INV1, the INV2 of Figure 10 (aftermentioned).

The device that is set to main frame is carried out the handling part of above-mentioned main frame, the device that is set to slave is carried out the handling part of above-mentioned slave, be set to the device of main frame in the increase of number of units, when reducing in the determination processing increase when number of units, the establishment of minimizing condition, the device that is set to slave is sent increase, the minimizing instruction of number of units, be set to the device of slave the increase of number of units, reduce command reception etc. pending in, receive the increase of number of units, when reducing instruction, carry out increase, the minimizing of number of units from the device that is set to main frame.

Then, describe embodiment in the situation that n platform said pump device is set in detail.For convenience of explanation, the n platform is take 2 as the example explanation.During facility planning, be planned to for the maximum water supply volume of supply equipment for water load, n platform pump installation is set, n platform pump installation turns round by oneself respectively and carries out pressure control.Particularly, in this water system, the discharge rate of establishing pump installation is Q0(m3/min), the maximum amount of water of load is Q(m3/min) time, carry out the computing of Q/Q0=n, to below the decimal point 1 round up, determine n, the n platform is set.Like this, need not to manufacture and design the water system of supply equipment special use, can doubly change constructing system by the n of pump installation standard items, therefore can shorten the manufacturing fate of design man-hour and private water supply system, and can the Application standard product, so can make it become cheap.

Fig. 9 represents to arrange the pump performance curve in the situation of 2 said pump devices and simultaneously running.The performance that chain-dotted line represents is the performance curve of pump installation shown in Figure 1.Performance curve shown in the solid line be make the pressure of this performance curve certain, 2 times of demonstrations of the water yield, be the synthetic performance curves that make in the situation of 2 parallel runnings.Certainly, arranging to become the synthetic performance curve of the parallel running of n platform in the situation of n platform, not shown herein.

Among Fig. 9, resistance curve J be to make pressure H3 that O3 orders is certain and to make water yield Q3 is 2 times some O5, equally O2 order pressure H2 certain and make water yield Q2 be 2 times some O6, O0 order pressure H0 certain and make that water yield Q0 is 2 times some O0 ', to make pressure H1 that O1 order necessarily and make water yield Q1 be the line segment that 2 times some O7 maps and also describes at that point.

In addition, pump performance curve G is the synthetic performance that makes 2 parallel runnings of pump performance curve C (when turning round with frequency f 2).Pump performance curve H is the synthetic performance that makes 2 parallel runnings of pump performance curve B (when turning round with frequency f 0).Pump performance curve I is the synthetic performance that makes 2 parallel runnings of pump performance curve A (when turning round with frequency f 1).That is, follow the change of water supply volume when turning round simultaneously for 2, J turns round at resistance curve.And because 2 identical, with roughly the same FREQUENCY CONTROL, pressure of supply water becomes the pressure on the resistance curve J.Because pressure of supply water is controlled as pressure on the resistance curve J, 2 frequency about equally, so be called constant speed drive herein.Because 2 pump installations turn round by oneself respectively and carry out pressure control and carry out constant speed drive, so the pressure oscillation in the time of can realizing preventing the water supply volume change.Be 1 speed change in the past, other constant speed drives.Its concrete control is processed as follows.

All devices possess selection pressure control function and non-pressure (constant speed) control function and select the unit of one of them.Namely, during the setting parameter of the step 705 of the step 502 of above-mentioned Fig. 5 or Fig. 7 is processed, preset pressure control function or non-pressure (constant speed) control function, its data " fv(pressure control function)/fc(non-pressure (constant speed) control function) " are saved among storage part M51, the M118.

Be set to always selection pressure control of the device function of main frame, be set to the Array selection of slave by the pressure control function of above-mentioned selected cell selection and any in non-pressure (constant speed) the control function, be set to the device of slave the increase of number of units, reduce command reception etc. pending in, from the device that is set to main frame receive the increase of number of units, when reducing instruction, carry out increase, the minimizing of number of units, when increasing number of units with the pressure control function selected and any running in non-pressure (constant speed) the control function.

Figure 10 is the system construction drawing that arranges in the situation of 2 identical pump installations.Fig. 2 of the system construction drawing of 2 pump installations is set, and performance, the function of the part that same-sign represents are identical.In addition, No. 1 machine of 1 expression of suffix, secondary numbering, No. 2 machines of 2 expressions are identical.Suction pipe 1 and feed pipe 6 conflux No. 2 machines of No. 1 machine.INV1 is connected communication terminal S2 to be connected with cable S5 with INV2.Play the effect of many runnings when thus, selecting as mentioned above automatically running.

Current sensor is built in the variable speed drive device thereby is not shown, and represents for the ease of understanding the current sensor 10-1, the 10-2 that install with the electric power supply line that leads to motor 4-1,4-2 in principle.The current sensor 10 that represents with the encirclement of circle frame among this current sensor 10-1,10-2 and Fig. 2 similarly is made of the current transformer that arranges on the electric power supply line that leads to motor 4-1,4-2 respectively, omits detailed icon herein.The current value that detects is supplied with handling part C-1, the C-2 of variable speed drive device INV1, INV2 respectively, processes.

All parameters, pump performance, the pressure controling modes such as starting pressure, increase and decrease pressure, goal pressure all are identical for 2 (being the n platform when extending to the n platform) as mentioned above, follow the increase of water to start successively, the number of units increase and decrease running of following the minimizing of water to stop is successively carried out along the constant speed drive of the certain control of terminal pressure of resistance curve.It is improper to start like this, simultaneously, stop to have eliminated simultaneously.

In the situation that automatically safeguard in the running, can suitably stop by pressing STOP key 32.Certainly, also can again turn round by pressing RUN key 31.And then, can also be when automatically turning round carrying out maintenance.That is, all devices possess individual operation and Duo Tai operation mode when automatically turning round, the Array selection individual operation pattern of safeguarding, and other select many operation modes to get final product.If by day or less time of water night implement, then can check the operating condition, malfunction of the device that is set as the individual operation pattern etc.If this moment, water increased, owing to being set as the automatically running of other devices of many operation modes, need not to worry to cut off the water supply, safeguard to become easy.

Above explanation is to arrange 2 as example, and certainly, the n platform setting more than 2 also can realize the constant speed drive of the certain control of terminal pressure of n platform, can supply water with the n water yield doubly.

(embodiment 2) then about embodiments of the invention 2, further use Figure 11～Figure 17 explanation.Description thereof is omitted with part that embodiment 1 shares.

Among Figure 11, when having selected the manual operation pattern, pump installation turns round when pressing the RUN key 31 of Fig. 3, stops when pressing STOP key switch 32.The parameter of the inverter frequency during manual operation is by the operating and setting of function (FUNC) key 36, upper key 34 and lower key 35, and initial value is stored in advance among the storage part M.

When having selected automatic operation mode, pump installation begins automatic running when pressing RUN key 31, stop when pressing STOP key 32.Even select automatic operation mode, as long as the starting conditions that pressure of supply water becomes below the starting pressure (being set as in advance initial value in parameter) is false just not entry into service.Above-mentioned starting pressure is by manually (MAN) (setting in parameter in advance) setting.

Automatically under the operation mode, prepare as shown in figure 11 the function (FUNC) of individual operation and Duo Tai running.The communication of the variable-ratio control device INV of Fig. 2 becomes individual operation when disconnecting with terminal S2, when communication is connected with cable with terminal S2, allow many running that connects.Wherein, communicate between communication is with terminal S2, no matter this communication is wired, wireless, can connect with the parameter substitution cable.In addition, in the situation of many runnings more than 3, at variable-ratio control device INV 2 terminal S2 are set.

In authorized pressure and frequency setting, use as mentioned above FUNC key 36 selection pressures or frequency, the operating and setting starting pressure by upper key 34 and lower key 35 or inverter frequency etc. are with storage key 33 storages.In host setting, the operating and setting by upper key 34 and lower key 35 is as the identiflication number (IDNO.) of the pump installation of main frame, with storage key 33 storages.In slave is set, set the identiflication number of main frame pump installation in addition, with storage key 33 storages.In main frame candidate's slave was set, the situation next but one that the setting main frame breaks down became the identiflication number of the slave of main frame, with storage key 33 storages.In the order of slave is set, operation by upper key 34 and lower key 35, when setting number of units and increase running with the identiflication number of pump installation and the running beginning order of the slave of number of units when reducing running and running stop order by turns and the pattern of rotating, with storage key 33 storages.

In the situation of above-mentioned many runnings more than 3, be the machine or other devices by identiflication number IDNO. identification.Identiflication number IDNO. is as mentioned above in advance as setting parameter, in the situation of n platform, suitably be set as respectively 1,2,3 ..., n.For example, identiflication number IDNO.1 is main frame, and other identiflication numbers are slave.In addition, with device at first entry into service when starting conditions is set up of the IDNO.1 that is set to main frame, become many runnings after, even stop condition is set up the mode that also stops at last, set main frame order by turns.

Figure 12, Figure 13, Figure 14 are the flow charts of the running control flow of expression pump installation, and it carries in the microprocessor of variable-ratio control device INV as program.Figure 15 is the memory map of storage above-mentioned parameter and program etc.

When bringing into use, when connecting mains side residual current circuit breaker ELB shown in Figure 2, program work.At first, when step 1500 begins, carry out initial treatment in step 1501, set in step 1502 execution parameter and process.In initial treatment, carry out register, insert various processing and the communication function initialization process such as vector, memory, stack pointer, whether executive communication port (communication terminal S2) is connected with the determination processing of cable.Not connecting then is individual operation, is many runnings in the situation of connection.

During setting parameter was processed, above-mentioned parameter was set to process and is set by above-mentioned CONS.Set above-mentioned initial value, in addition, the device that the next one starts when setting the number of units increase in the ONSTB of memory M54 and M121 is the device of IDNO.2 for example, and the device that the next one stopped when the setting number of units reduced in the OFFSTB of M55, M122 is the device of IDNO.2 for example, the preparation of turning round.Allow to insert in

step

1503,1504, prepare insert handling shown in Figure 14.Certainly, insert the insert handling after the execution in step 1700.

In the INT0 insert handling after step 1700, shown in Figure 14 (A), in step 1701, determine whether some key switches of supressing among Fig. 3.If the result who judges not by the next step 1702 that advances to, such as show pressure that initial values are determined etc. at display 30, carries out the RETI processing of returning the processing before inserting from insert handling in step 1711.

If the result of determination of step 1701 then advances to step 1703 for supressing key switch, judge whether parameter modification key of the key switch (Fig. 3) press.Be in the situation of parameter modification key, advance to step 1707, execution parameter is set (expression can be changed) and is processed and to the stores processor of memory (storage part M), its store status as shown in figure 15.Like this, the on-stream setting change that also can carry out parameter.

If be not the parameter modification key in the judgement of step 1703 then advance to step 1704,, carry out the key switch pressed and whether be the determination processing of main frame/slave set condition (for example operation of the upper key 34 by Fig. 3, lower key 35, FUNC key 36) herein.Advance to step 1706 in the situation for no (NO), for being that to advance to step 1705 in the situation of (YES) be main frame or the setting of slave.For example, consider to make the IDNO.1 machine from main frame change to slave, when making the IDNO.2 machine change to the situation of main frame from slave, read separately data at display 30, make state switch to slave or switch to main frame from slave from main frame by pressing simultaneously upper key 34, lower key 35, FUNC key 36.Then, the data SLE of storage expression slave in memory M120, the M53 of IDNO.1 machine, the data M AS of storage expression main frame in memory M120, the M53 of IDNO.2 machine.

In the INT1 insert handling after step 1720, shown in Figure 14 (B), carry out inspection, the supervision of fault in step 1721.The communication terminal S2 that carries out variable-ratio control device INV in step 1722 is the judgement that connects or disconnect, and carries out sending and receiving processing in the situation of connection, if automatic operation mode then arranges the data of TAN/FUK parameter in memory M3, M103.For example, if communication terminal S2 connection cable not then arranges data 00H.Its expression individual operation is the running of the machine.If communication terminal S2 is connected with cable, data 0FFH is set then.Many runnings of its expression are the running of n platform shown in Figure 11.In addition, carry out and the communicating by letter and running, the state that stops of each among each IDNO. stored into after the memory 114 of other devices.

In step 1723, the signal of detected pressures sensor and frequency is with the AN0(pressure of simulation in the register) and the data of current frequency f ANS store among memory M108, the M111.Then, the processing step 1724 is returned insertion from insert handling before.

In the step 1505 of Figure 12, be judged to be MAN and advance to and return step 1505 after step 1506 is carried out the manual operation processing.Said manual operation is processed and is referred to herein, turns round when pressing above-mentioned RUN key switch, stops when pressing the STOP key switch, sets the processing of inverter frequency with upper and lower key switch.

Then, the situation of operation mode parameter MAN/AUTO being set or changes to AUTO is described.Being judged to be AUTO and advancing to step 1507 of step 1505.Determine whether herein and supress the RUN key switch.If for being (YES) then advance to next step 1508, beginning is running automatically.If for no (NO) then repeatedly carry out processing herein until to become be (YES).

In step 1508, carry out the judgement of TAN/FUK, namely be individual operation or the judgement of many runnings, advance to step 1511 in the situation of individual operation, advance to step 1509 in the situation of many runnings.In step 1509, judge that according to above-mentioned IDNO. the machine is main frame or slave.The result who judges if main frame then advances to step 1511, is that slave then advances to step 1510.Determine whether running instruction from main frame herein.If running instruction then advance to step 1511 is arranged, then return step 1508 without the running instruction, carry out processing during this period until the running instruction is arranged.

In step 1511, judge that whether pressure of supply water that pressure sensor detects is as below the starting pressure (H4).If be below the starting pressure H4, then advance to step 1512 make pump up moving.Then, in

step

1513,1514,1515, read goal pressure H0(from storage part and be for the first time initial value H4, play for the second time the goal pressure of upgrading for step 1526.), the pressure of supply water that reads pressure of supply water H(reality is the pressure data AN0 that pressure sensor detects, H0=AN0 uses mark H for convenience of explanation in flow chart.), and two data are compared.If result relatively is H0+ α＜H then advance to step 1516.In the step 1516, set as described below low-limit frequency, judge whether the inverter frequency of current running is low-limit frequency.The result who judges if low-limit frequency then advances to step 1517, then advances to step 1522 if not low-limit frequency.Herein, the establishing method of low-limit frequency is as described below.

(situation of the constant speed drive of many whole speed changes of pump) is take the n=2 platform as the example explanation.(with reference to Fig. 9) details are described below, and the establishing method of the low-limit frequency when number of units reduces is described herein.1. on 1 pump performance curve and during n platform pump constant speed drive, on the synthetic performance chart of pump, when describing 1 running and pipe arrangement resistance curve F, J during the running of n platform.2. the pump performance curve when turning round take highest frequency and the intersection point Ht of pipe arrangement resistance curve are as number of units increases, number of units reduces pressure, and the water yield corresponding with it is Qt.Pipe arrangement resistance curve F when 1 pump running and the intersection point O5 of the straight line that water yield Qt/2 is extended upward describe pump performance curve K, and the frequency f G that satisfies it is low-limit frequency.These Ht, fG is pre-stored to memory.Perhaps also can computing and setting in the processing of step 1516.In addition, in this example, with n=2 platform explanation, and also can use the same method more than 3 determine or set that number of units increases, the pressure when number of units reduces, the low-limit frequency when number of units reduces.

(situation of the non-constant speed drive of many pump speed changes and constant speed) is take the n=2 platform as the example explanation.(with reference to Figure 16) details are described below, and the establishing method of the low-limit frequency when number of units reduces is described herein.At first, use in advance the pump performance curve map, for example as shown in figure 16, the synthetic performance chart mapping of the pump during to parallel running.Among this figure, the goal pressure during parallel running is between water yield Q1～Q6, link coordinate O1(low-limit frequency f5, lower limit goal pressure H1), coordinate O6(highest frequency f1+f1, lower limit goal pressure H5) for example equation of line segment.Owing to being equation, that low-limit frequency f5, lower limit goal pressure H1, highest frequency f11, lower limit goal pressure H5, closing presure HS is pre-stored to storage part as parameter.And lower limit goal pressure H1, highest frequency f1+f1 when low-limit frequency f5 uses pump closing presure HS, 2 runnings press

f

5 = (f 1 + f 1) \times \sqrt{(H 1 / HS)}

Obtain.

In the parameter of the step 1707 of the step 1502 of Figure 12 and Figure 14 is processed, carry out this processing and store storage part into.

In the step 1517, and above-mentionedly similarly carry out the judgement of TAN/FUK, namely be individual operation or the judgement of many runnings, advance to step 1522 in the situation for individual operation and carry out to slow down and process.Advance to step 1518(Figure 13 in the situation of many runnings) to carry out the machine be main frame or the judgement of slave.The result who judges is if main frame then advances to step 1519 and carries out the judgement whether number of units minimizing condition is set up.For being advances to step 1520 pair slave to send number of units and reduce instruction in the situation of (YES), advance to step 1528.

The number of units that represents Fig. 1 reduces the order of sending of instruction.Figure 17 represents that pump installation is 4 example.For example, in the processing of step 1519, the data of the OFFSTB of read memory M120 are for the IDNO. execution halt instruction of this slave.For example, if the next device that stops be IDNO.2 then it stopped.Then, advance to step 1520A and carry out by turns processing, advance to step 1528.In the by turns processing of step 1520A, read the data of the device RUN that is turning round that stores among the M101, with the data of the OFFSTB of memory M122 relatively, the Data Update of the IDNO. device that from the data of RUN the device of the IDNO. of the lowest number after the data of OFFSTB is stopped as the next one is the data of OFFSTB, is kept among memory M53, the M120.

Like this, then the number of units of execution in step 1520 reduces when processing, and stops than the IDNO. device of the IDNO. device that stops before bigger (the numbering number is large), rotates.Certainly, the IDNO.1 machine is main frame, in the parameter of step 1502 is processed, be redefined at first running, stop at last, in the processing of step 1520A, comprise in the data of RUN in the situation of data fit of many table apparatus of IDNO.1 machine, carry out making the IDNO.1 machine be not included in processing in the device that the next one stops.

Concrete example is as described below.State 1 rotating device: the device that IDNO.1, IDNO.2, the IDNO.3 next one stop: the device of IDNO.2 state 2IDNO.2 stops.The device that rotating device: IDNO.1, the IDNO.3 next one stop: the IDNO.3(rotating device is IDNO.1, IDNO.3, and in the situation of many runnings, forbid stopping the IDNO.1 as main frame, the device that a upper next one stops is IDNO.2, rotating device IDNO.3 is the device less No. than IDNO.2, and IDNO.3 is chosen as the device that the next one stops.) device of state 3IDNO.3 stops.Rotating device: the device that the IDNO.1 next one stops: IDNO.1.

Describe above-mentioned action in detail with Figure 17 as described below.Pattern 1 pump is increased to 1 from 0, and reduce to 0 (with reference to Figure 17) rotating device from 1: the IDNO.1(1 prow turns round first) → No. 1 machine stops to become 0 → IDNO.2 → No. 2 machine and stops to become 0 → IDNO.3 → No. 3 machine and stop to become 0 → IDNO.4 → No. 4 machine and stop to become 0 → IDNO.1.

In this situation, forbid the IDNO.1(slave) stop, namely water supply volume becomes 0 and does not also stop pump, only continues the running of No. 1 machine.Like this, the probability that main frame breaks down first significantly improves, and probability that other slaves break down reduces, and putting maintenance into practice successively from main frame has improved maintainability.

Pattern 2 pumps are increased to 2, reduce to 1 (with reference to Figure 17) rotating device from 2 from 1: the IDNO.1(1 prow turns round first) → IDNO.1(remains in operation)+the IDNO.2(2 machine follows) → IDNO.1(remains in operation) → IDNO.1(remains in operation)+the IDNO.3(3 machine follows) → IDNO.1(remains in operation) → IDNO.1(remains in operation)+the IDNO.4(4 machine follows) → IDNO.1(remains in operation) return initial.The device that the next one stops: the device that except No. 1 machine, turns round first.

Mode 3 is pumped from two units to three units, reduced from three to two sets (see Figure 17) operating system: IDNO.1 (1 Unit First run) + IDNO.2 → IDNO.1 (1 Unit First run ) + IDNO.2 + IDNO.3 (3 unit follower) → IDNO.1 (1 unit first run) + IDNO.3 (3 unit continues to operate) → IDNO.1 (1 unit first run) + IDNO .3 (the 3rd machine continues to run) + IDNO.4 (4 unit follower) → IDNO.1 (1 unit first run) + IDNO.4 (4 unit continues to operate) → IDNO.1 (1 unit first operation) + IDNO.4 (4 unit continues to run) + IDNO.2 (2 unit follower) next stop device: In addition to the 1st machine outside the first operation of the device.

Advance to step 1528 in the situation of being judged to be of the step 1519 of Figure 13 no (NO).

Said number of units minimizing condition refers to following processing herein.1. the operating condition of the machine (IDNO.1) slave in addition checked by each IDNO., obtain operating number, the pump installation that therefrom will turn round is at first elected as and is sent the pump that number of units reduces instruction.According to operating number, set or read that above-mentioned number of units increases, number of units reduces pressure (number of units increases, share when number of units reduces) from pre-stored memory.Low-limit frequency when similarly, setting or reading number of units and reduce from pre-stored memory.2. inverter frequency becomes low-limit frequency, and pressure of supply water becomes number of units and reduces more than the pressure, or this state is through the stipulated time.3. also can use number of units shown in Figure 9 to reduce electric current I G replaces number of units to reduce pressure.

In the result of determination of the step 1518 of Figure 13, be judged to be in the situation of slave and advance to step 1521, carry out whether the judgement that reduces instruction from the number of units of main frame is arranged.For being in the situation of (YES), advance to step 1525, execution stops to process (number of units minimizing), returns step 1505 and continuation processing thereafter.Be judged to be in the situation of no (NO) and advance to step 1528.

In the step 1522, reduce for example 0.1Hz of aHz(from current frequency) carry out to slow down and process, judge in step 1523 whether current frequency arrives the instruction frequency, carry out and confirm to process until arrive the instruction frequency.In step 1524, confirm by flow switch whether the use state of water is few, carry out in step 1525 in the few situation of the use state of water and stop to process and returning step 1505.Not to advance to step 1528 in the few situation, determine whether herein and supress the STOP key.The result who judges in the situation about pressing, carries out and stops to process with the above-mentioned step 1525 that similarly advances to.In the situation about not pressing, return step 1513 and continue processing afterwards.

The result that the step 1515 of Figure 12 is judged, if H0-were α＜=H＜=goal pressure of the certain control of terminal pressure of the use prior art of H0+ α then execution in step 1526 would upgrade and processes.(obtain the method working pressure parameter of goal pressure and arithmetic expression or the table of frequency parameter.) then, upgrade stand-by period processing required and stablize required stipulated time Δ t for pressure of supply water at step 1527 performance objective pressure, advance to step 1528.

The result of the judgement of step 1515 is if H0-is α〉H then advances to step 1529.Judge whether current inverter frequency is highest frequency herein.The result who judges, if become highest frequency then advance to the step 1532 of Figure 13, if do not become highest frequency then advance to the step 1530 of Figure 13, the speedup after carrying out is processed.Speedup adds for example 0.1Hz of aHz(to current frequency in processing) carry out the speedup processing, carry out current frequency in step 1531 and whether arrive the affirmation processing of instruction frequency until arrive the instruction frequency.If arrive then advance to step 1528.

Herein, the frequency f of variable-speed processing is identical with the fxAUTO of memory M109, uses for convenience of explanation f in the flow chart.In addition, above-mentioned α is the dead band of goal pressure, for example is 1m.In the step 1532, and above-mentionedly similarly carry out the judgement of TAN/FUK, namely be individual operation or the judgement of many runnings, advance to step 1530 in the situation for individual operation and carry out speedup and process.Advancing to step 1533 execution the machine in the situation for many runnings is main frame or the judgement of slave.The result who judges is if main frame then advances to step 1534 and carries out the judgement whether number of units increase condition is set up.For being in the situation of (YES), advancing to step 1535 and slave is sent number of units increases instruction, advances to step 1528.

Figure 17 represents that number of units increases the order of sending of instruction.The figure shows pump installation and be 4 example.For example, in the processing of step 1535, the data of the ONSTB of read memory M121 are to the IDNO. execution running instruction of this slave.For example, if the device of next running is IDNO.2, then make its running.Then, advance to step 1535A and carry out by turns processing, advance to step 1528.In the by turns processing of step 1535A, read the data of the device STOP that stops that storing among the M102, with the data of the ONSTB of memory M121 relatively, will be than the data of ONSTB from the data of STOP the device of little No. one IDNO. be the data of ONSTB as the Data Update of the IDNO. device of next one running, store memory M54, M121 into.

Like this, then the number of units of execution in step 1535 increases when processing, and than the bigger IDNO. device running of the IDNO. device of before running, rotates.Certainly, the device of next running is set as IDNO.2 in the parameter of step 1502 is processed.

Concrete example is as described below.The device of the next running of state 1 rotating device: IDNO.1: the device running of IDNO.2 state 2IDNO.2.The device of the next running of rotating device: IDNO.1+IDNO.2: be IDNO.1, IDNO.2 if IDNO.3(establishes rotating device, the device that stops is IDNO.3, IDNO.4, then the device of Last next running is IDNO.2, the IDNO.3 of arresting stop is the device less No. than IDNO.4, and IDNO.3 is chosen as the device of next running.The device running of state 3IDNO.3.The device of the next running of rotating device: IDNO.1+IDNO.2+IDNO.3: IDNO.4.Advance to step 1528 in the situation of being judged to be of step 1534 no (NO).

Said number of units increase condition refers to following processing herein.1. the operating condition of the machine (IDNO.1) slave in addition checked by each IDNO., obtain operating number, therefrom will number less pump installation and elect the pump that the next one sends number of units increase instruction as.According to operating number, setting or reading above-mentioned number of units from pre-stored memory increases pressure (number of units increase, shared when number of units reduces).Highest frequency when setting or reading number of units and increase from pre-stored memory.2. inverter frequency becomes highest frequency, and pressure of supply water is that number of units increases below the pressure, or this state is through the stipulated time.3. also can use number of units shown in Figure 9 to increase electric current I t replaces number of units to increase pressure.

The result of the judgement of step 1533 is judged to be in the situation of slave and advances to step 1536, carries out the judgement that whether has from the running instruction of main frame.The result who judges, for being advances to step 1535 in the situation of (YES), carrying out number of units increases and processes and process by turns and advance to step 1528.In the situation for no (NO), return step 1508 and continue processing afterwards.

As mentioned above, the n platform pump installation with identical function, performance is set, in the constant speed drive that carries out the certain control of terminal pressure, carries out the number of units increase and decrease running of the pump installation of n platform setting.

Then, describe the embodiment of the situation that n platform said pump device is set in detail.For convenience of explanation, the n platform is take 2 as the example explanation.

During facility planning, be planned to for the maximum water supply volume of supply equipment for water load, n platform pump is set, n platform pump installation turns round by oneself respectively and carries out pressure control.Particularly, in this water system, the discharge rate of establishing pump installation is Q0(m3/min), the maximum amount of water of load is Q(m3/min) time, carry out the computing of Q/Q0=n, to below the decimal point 1 round up, determine n, the n platform is set.Like this, need not to manufacture and design the water system of supply equipment special use, can doubly change constructing system by the n of pump installation standard items, therefore can shorten the manufacturing fate of design man-hour and private water supply system, and can the Application standard product, so can make it become cheap.

Fig. 9 represents to arrange the pump performance curve in the situation that 2 said pump devices carry out constant speed drive (2 all runnings in speed change).Performance shown in the chain-dotted line is the performance curve of pump installation shown in Figure 1.Performance curve shown in the solid line be make the pressure of this performance curve certain, 2 times of demonstrations of the water yield, be the synthetic performance curves that make in the situation of 2 parallel runnings.Certainly, arranging to become the synthetic performance curve of the parallel running of n platform in the situation of n platform, not shown herein.

In addition, pump performance curve G is the synthetic performance that makes 2 parallel runnings of pump performance curve C (when turning round with frequency f 2).Pump performance curve H is the synthetic performance that makes 2 parallel runnings of pump performance curve B (when turning round with frequency f 0).Pump performance curve I is the synthetic performance that makes 2 parallel runnings of pump performance curve A (when turning round with frequency f 1).That is, follow the change of water supply volume when turning round simultaneously for 2, J turns round at resistance curve.And because 2 identical, with roughly the same FREQUENCY CONTROL, pressure of supply water becomes the pressure on the resistance curve J.Because pressure of supply water is controlled as pressure on the resistance curve J, 2 frequency about equally, so be called constant speed drive herein.When carrying out constant speed drive, 2 pump installations turn round by oneself respectively and carry out pressure control and carry out constant speed drive, the pressure oscillation in the time of therefore can realizing preventing the water supply volume change.Be 1 speed change in the past, other constant speed drives.

And then above-mentioned explanation increases and decreases with the pressure representative number of units, but also can use the operation of inverter electric current to replace pressure.Among Fig. 9, line segment M is the current curve when pump installation is turned round with inverter frequency f1, and its intersection I t with the straight line that water yield Qt is extended upward is that number of units increases electric current (being increased to 2 from 1).Similarly, line segment L is the current curve when pump installation is turned round with inverter frequency fG, and its intersection I G with the straight line that water yield Qt/2 is extended upward is that number of units reduces electric current (being increased to 2 from 1).

Figure 16 represents to arrange 2 said pump devices, carries out the pump performance curve in the situation of non-constant speed drive (1 speed change, 1 constant speed).Performance shown in the chain-dotted line is the performance curve of pump installation shown in Figure 1.In addition, the part identical with Fig. 9 symbol is identical, and therefore description thereof is omitted.1 pump arrives highest frequency and becomes 2 when turning round simultaneously, and 1 is carried out constant speed drive, and 1 is carried out changed speed operation.Therefore, in the situation that the Q-H performance curve O of the Q-H performance curve N that is determined by the low-limit frequency f5 of changed speed operation with the intersection point O1 stack of the Q-H curve A of pipe arrangement resistance curve F and highest frequency f11 running and the goal pressure H1 of this moment is constant speed (performance curve A) and the resultant curve of speed change (performance curve N).

The resultant curve of 2 Q-H performance curves when turning round take highest frequency f11 is as R, with the intersection point O6 of pipe arrangement resistance curve F be goal pressure H5.State in its way is by the Q-H performance curve B of high-frequency f10 and highest frequency f11 decision and the resultant curve P of Q-H performance curve A stack.The water yield corresponding with intersection point O6, O7 is respectively Q6, Q7.Herein, the starting pressure of First is H4, and second is that number of units increases, number of units minimizing pressure is H1.And then goal pressure is set as on resistance curve F.That is, simultaneously in the situation of running, with from water yield Q1 to the Q6, goal pressure is set from the mode that H1 becomes H5 more than 2.

Above explanation has represented that pump installation is 2 example, be that situation more than 3 is above illustrating and make the n platform, thereby description thereof is omitted.

Figure 16 is the system construction drawing that arranges in the situation of 2 identical pump installations.Fig. 2 of the system construction drawing of 2 pump installations is set, and performance, the function of the part that same-sign represents are identical.In addition, No. 1 machine of 1 expression of suffix, secondary numbering, No. 2 machines of 2 expressions are identical.Suction pipe 1 and feed pipe 6 conflux No. 2 machines of No. 1 machine.INV1 is connected communication terminal S2 to be connected with cable S5 with INV2.Play the effect of many runnings when thus, selecting as mentioned above automatically running.

All parameters, pump performance, the pressure controling modes such as starting pressure, increase and decrease pressure, goal pressure all are identical for 2 (being the n platform when extending to the n platform) as mentioned above, number of units increase and decrease and the alternate operation following the increase of water to start successively, follow the minimizing of water to stop are successively carried out along constant speed drive or the non-constant speed drive of the certain control of terminal pressure of resistance curve.Like this, eliminated start simultaneously, stop simultaneously improper.In addition, realized the homogenization of the running frequency of slave by when number of units increases and decreases, carrying out alternate operation.

And then, in the situation that automatically safeguard in the running, can suitably stop by pressing the STOP key.Certainly, also can the again running by pressing the RUN key.Above explanation is to arrange 2 as example, and certainly, the n platform setting more than 2 also can realize the constant speed drive of the certain control of terminal pressure of n platform, can supply water with the n water yield doubly.

Other embodiments of embodiment 2 then, are described.

Embodiment 2 is in the above-described embodiment, even be set to the rear stop condition of main frame running, the establishment of number of units minimizing condition of main frame, also to forbid stopping.In the step 1520 of Figure 12, send when number of units reduces instruction and take a decision as to whether main frame (the machine), in the situation for the machine, do not send halt instruction and skip step 1528 and get final product.Like this, for the purposes of water supply volume change, can suppress the pressure oscillation when all stopping to start to First.

Embodiment 3 is arresting stop with host setting, and it is stopped at last.During the setting parameter of the step 1707 of its step 1501 at Figure 12, Figure 14 is processed, for main frame the maximum IDNO. of numbering among each IDNO. is set as main frame, other are set as slave.Like this, the running rate of the microprocessor processes of rotating device reduces, and response improves.

Embodiment 4 arranges the setup unit (for example upper and lower key) of replacing main frame in

embodiment

1,3, can be by this setup unit by outside manual operation change main frame.Specific description as mentioned above, therefore description thereof is omitted.Like this, become and be easy to safeguard.

Embodiment 5 in

embodiment

1,3, carry out number of units increase and decrease by turns the time, rotate by the device except main frame.Particularly, in the processing by turns of step 1520A, the 1535A of Figure 13, the processing of appending main frame eliminating from by turns gets final product.Like this, because main frame does not stop, can making number of units increase and decrease, rotate processing and become stable.In addition, can identify main frame and slave.

Embodiment 6 breaks down (comprising that also communication is bad) if main frame is on-stream in

embodiment

1,3, then is the slave of comparing the minimum device of numbering in the slave with main frame with main frame change (replacement).Particularly, break down, then the processing that main frame switches to the minimum device of numbering in the slave got final product if in the processing of the trouble shooting of the step 1721 of Figure 14, append main frame.Like this, also can carry out stable control when breaking down, can avoid cutting off the water supply.

Claims

1. water system, it arranges n platform pump installation, described pump installation comprise have microprocessor, the variable-ratio control device of the storage part of guidance panel and each setting value of storage; Pump with this variable-ratio control device driving; Detect the current sensor of the revolution electric current of this pump; With the pressure sensor that the discharge side of this pump possesses, each pump installation is independently running respectively, becomes authorized pressure so that the pump that described pressure sensor detects is discharged lateral pressure, and described water system is characterised in that:

The number of units of setting the maximum speed of described each pump installation and minimum speed, revolution electric current by described guidance panel increases electric current and number of units reduces electric current, constitute the running that to carry out connecting with cable the n platform pump installation between each pump installation, described variable-ratio control device increases instructions or number of units minimizing instruction based on following condition to many pump installations output number of units according to supplying water load:

The number of units of pump increases condition: n-1 platform pump installation is maximum speed and revolution electric current when reaching number of units and increasing electric current, makes pump installation be increased to the n platform from the n-1 platform;

The number of units of pump reduces condition: when n platform pump installation becomes minimum speed and revolution electric current and reaches number of units and reduce electric current, make pump installation reduce to the n-1 platform from the n platform.

2. water system as claimed in claim 1 is characterized in that:

When the revolution electric current of described n-1 platform pump installation and the one in the discharge pressure reach first number of units increase condition, make pump installation be increased to the n platform from the n-1 platform, when the revolution electric current of described n platform pump installation and the one in the discharge pressure reach first number of units minimizing condition, make pump installation reduce to the n-1 platform from the n platform.

3. water system as claimed in claim 1 or 2 is characterized in that:

The variable-ratio control device of described n platform, setup unit with main frame and slave, be set as main frame by setup unit with 1 in the n platform pump installation in advance, other are set as slave, and described main frame is according to for water load described slave output number of units being increased instruction or number of units minimizing instruction.

4. water system as claimed in claim 3 is characterized in that:

The variable-ratio control device of all pump installations, possesses the increase of the number of units of main frame, reduce the handling part of judgement and the increase of number of units, reduce the handling part of instruction, and possesses the increase of the number of units of slave, reduce the handling part of command reception wait and the increase of number of units, reduce the handling part of carrying out, be set to the device execution of main frame as the processing of main frame, be set to the device execution of slave as the processing of slave, increase in number of units, reduce in the determination processing, increase when number of units, when the minimizing condition is set up, be set to the device of main frame is exported respectively number of units to the device that is set to slave increase, reduce instruction, increase in number of units, reduce in the processing of command reception wait, the device that is set to slave receives the increase of number of units from the device that is set to main frame, when reducing instruction, carry out the increase of number of units, reduce.

5. water system as claimed in claim 1 or 2 is characterized in that:

Respectively entry into service and carry out constant speed drive when starting conditions is set up of the n table apparatus that can turn round.

6. water system as claimed in claim 3 is characterized in that:

The variable-ratio control device of all pump installations possesses pressure control function, non-pressure (constant speed) control function and selection be the unit of any wherein, be set to always selection pressure control of the device function of main frame, be set to the Array selection of slave by the pressure control function of described selected cell selection and any in non-pressure (constant speed) the control function, increase in number of units, during minimizing command reception etc. are pending, the device that is set to slave receives the increase of number of units from the device that is set to main frame, when reducing instruction, carry out the increase of number of units, reduce, when number of units increases, turn round with the pressure control function of selection and any in non-pressure (constant speed) the control function.

7. water system as claimed in claim 1 is characterized in that:

In the variable-ratio control device of all pump installations, possess individual operation and Duo Tai operation mode when automatically turning round, the pump installation of safeguarding is selected the individual operation pattern, and other pump installations are selected many operation modes.

8. water system, it arranges n platform pump installation, described pump installation comprise have microprocessor, the variable-ratio control device of the storage part of guidance panel and each setting value of storage; Pump with this variable-ratio control device driving; With the pressure sensor of the discharge side that is installed in this pump, each pump installation is independently running respectively, becomes authorized pressure so that the pump that described pressure sensor detects is discharged lateral pressure, and described water system is characterised in that:

It is the setup unit that main frame or slave are set that each variable-ratio control device of described n platform pump installation has selection, be set as main frame with 1 in the n platform pump installation in advance by described setup unit, other are set as slave, the main frame that is set at first starts when starting conditions is set up, when stop condition or the establishment of number of units minimizing condition, stop at last, when described main frame breaks down, by described setup unit 1 pump installation replacement in other slaves is set as main frame.

9. water system as claimed in claim 8 is characterized in that:

Described main frame is according to the number of units that increases or reduce pump installation for water load, increases by turns or the order when reducing number of units.

10. water system as claimed in claim 9 is characterized in that:

Described main frame is according to increasing for water load or when reducing the number of units of pump installation, to many slaves order by turns.

11. water system as claimed in claim 8 is characterized in that:

Be set to the pump installation of main frame, even stop condition or number of units minimizing condition are set up and also remained in operation after running.

12. water system as claimed in claim 8 is characterized in that:

When described main frame broke down, 1 pump installation in other slaves was replaced and is set as main frame by the setup unit of its variable-ratio control device.

13. water system as claimed in claim 8 is characterized in that:

When described main frame broke down, 1 pump installation comparing the minimum device of numbering in other slaves with main frame was replaced and is set as main frame.