CN103362178B - Water supply system - Google Patents

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 and multiple stage pump installation is set, water system that each pump installation separately operates.

Background technology

What water supply installation used setting separately or multiple stage to arrange (uses inverter when driven induction motor by variable speed drive unit, drive the controller using it special when permanent magnet electric motor, this controller is also based on inverter) pump installation that drives.

Patent document 1, patent document 2 can be enumerated as the prior art of above-mentioned water supply installation.In patent document 1, respectively by carried microprocessor inverter main body, control substrate, pump and motor and form the heavy system of n, and in the autonomous decentralized water supply control system be made up of the interface board having carried the microprocessor that they share, (1) the control substrate that n is heavy sends instruction from interface board, carries out Stress control by each control substrate.(2) if there is communication abnormality when power supply is connected, then become manual operation by the initialization process of each control substrate, when there is communication abnormality in running, the operation mode signal (manual operation pattern, closedown or automatic operation mode) of the interface board before generation communication abnormality is stored in the EEPROM controlling substrate, this pattern performs the process of closing when closing, when manual, perform manual process, when automatic, perform process automatically.(3), when there is communication abnormality between the control substrate that interface board and n weigh, each substrate that controls is manual operation or the parameter automatically operated according to judging, carries out manual operation or automatically operates, automatically operating when communication abnormality restores.(4), when there is communication abnormality between the control substrate that interface board and n weigh, the control substrate of communication abnormality is set as, than common starting pressure parameter-3m, avoiding operating simultaneously.

In patent document 2, the heavy system of n is formed respectively by the inverter main body and control substrate, pump, motor of having carried microprocessor, and possess the interface board having carried the microprocessor that they share, control in the heavy system of n of the running of water supply installation, (1) the control substrate that n is heavy has selects main frame still from the setup unit of machine, in advance by control substrate heavy for n only 1 be set as main frame, other are set as from machine, main frame, from running, allly sends operation control command from machine to other.(2) carry out the transmission of signal between main frame and interface board, stop the transmission with the signal of interface board from machine.(3) main frame etc. is set as by from the replacement of 1 in machine during hostdown.

Patent document 1: Japanese Unexamined Patent Publication 2009-228649 publication

Patent document 2: Japanese Unexamined Patent Publication 2008-202556 publication

Summary of the invention

In prior art shown in these patent documents, the pressure that condition when starting as each device and when stopping is detected by pressure sensor controls.But the detected value that there is pressure sensor is correct but water system situation about slightly freezing, worry can not correctly detected pressures.

In water system, the water supply volume of family is significantly different according to time period (such as morning, the late into the night) of one day, needs the operating number correspondingly increasing, reduce pump installation.In the change of this number of units, increase number of units in the morning that load increases, but when the late into the night in the winter time, pressure sensor freezed, the correct pressure corresponding to load can not be detected.

In addition, when carrying out the increase of the operating number of pump installation, minimizing, when worrying to switch, there is pressure oscillation, require this variation of suppression.

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

In addition, in the prior art shown in these patent documents, when making running burden (running) degree of the heavy system (comprising pump, motor, control system) of n impartial, the probability simultaneously broken down is higher, and worry that maintenance concentrates on contemporaneity, maintainability is deteriorated.In addition, in prior art, higher level need control to multiple stage arrange pump installation how to operate control control system (interface board), in addition, need the structure for subsequent use when there is exception and control thereof in multiplicated system, no matter in any situation, all worry structure, distribution, control becomes complicated, the practician without professional knowledge just cannot tackle, and cost becomes unfavorable.

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

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 forms drive system, this variable-ratio control device has authorized pressure setup unit, setting main frame and the unit from machine, setup unit replaced by main frame, there is its storage part, at the discharge side setting pressure sensor of this pump, according to for water load, n platform pump installation is set, carry out Stress control, the pump discharge side pressure that this pressure sensor is detected becomes authorized pressure, the n platform pump installation of the variable-ratio control device that cable is connected operates, this n platform pump installation carries out alone operating and Stress control respectively, make the pump being set as main frame, inverter drive system is than the pump be set as from machine, inverter system running is more of a specified duration, make main frame than improving maintainability from the fast loss of machine.

The present invention, in order to solve above-mentioned problem, provides a kind of water system, and it arranges n platform pump installation, and said pump device comprises the variable-ratio control device of the storage part with each setting value of microprocessor, guidance panel and storage; With the pump that this variable-ratio control device drives; 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 separately operates, and the pump discharge side pressure that this pressure sensor is detected becomes authorized pressure, and the feature of above-mentioned water system is:

Electric current is increased and number of units reduces electric current by the number of units of the aforesaid operations panel setting maximum speed of above-mentioned each pump installation and minimum speed, revolution electric current, be configured to the running can carrying out connecting the n platform pump installation between each pump installation with cable, above-mentioned variable-ratio control device, according to for water load, exports number of units increase instruction or number of units minimizing instruction based on following condition to multiple stage pump installation.The number of units of pump increases condition: (n-1)th pump installation is maximum speed and revolution electric current reaches number of units when increasing electric current, makes pump installation be increased to n platform from n-1 platform.The number of units of pump reduces condition: n-th pump installation becomes minimum speed and revolution electric current reaches number of units when reducing electric current, makes pump installation reduce to n-1 platform from n platform.

In addition, provide a kind of water system, it arranges n platform pump installation, and said pump device comprises the variable-ratio control device of the storage part with each setting value of microprocessor, guidance panel and storage, with the pump that this variable-ratio control device drives, with the pressure sensor of discharge side being arranged on this pump, each pump installation separately operates, the pump discharge side pressure that above-mentioned pressure sensor is detected becomes authorized pressure, in above-mentioned water system, each variable-ratio control device of said n platform pump installation has to be selected to be the setup unit that main frame or carry out from machine sets, in advance 1 in n platform pump installation is set as main frame by above-mentioned setup unit, other are set as from machine, first the main frame be set starts when starting conditions is set up, reduce when condition is set up at stop condition or number of units and finally stop, when above-mentioned main frame breaks down, by above-mentioned setup unit, by other, from 1 machine, a pump installation replacement is set as main frame.

According to the present invention, correct number of units increase, number of units minimizing condition can be set, so the correct unit number control of rule can be carried out to each pump installation.In addition, to increase according to the number of units of n platform pump installation, the setting of condition when number of units reduces, there is the effect of pressure oscillation when number of units can be suppressed to change.And then, more easily safeguard.

Accompanying drawing explanation

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

In Fig. 6, (A), (B), (C), (D), (E) are the flow charts that the same number of units increases, number of units reduces process.

(A) in Fig. 7, (B) are the flow charts of the insertion process that the same running controls.

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

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 two the same pump installations arranged.

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) in Figure 13, (C), (D), (E) are the flow charts of the same rotation process.

(A) in Figure 14, (B) are the flow charts of the insertion process that the same running controls.

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

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

In Figure 17, (A), (B), (C) are rotation key diagrams.

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.

Detailed description of the invention

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

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

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

Pump installation is along with the variation needing side water supply volume, and the pressure of supply water detected to make pressure sensor reaches the mode control inverter frequency of goal pressure, i.e. above-mentioned resistance curve F.Be referred to as terminal pressure necessarily to control.Certainly, H1, H4 preset as mentioned above as parameter and store.Wherein, in diagram, by representational curve A (frequency f 1) ~ curve E(frequency f 4) represent 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, therefore can omit.

In addition, H4 is also used as starting pressure when pump starts from halted state.That is, in automatically operating, if the pressure of supply water that pressure sensor detects is below starting pressure H4, pump operates, and the variation along with water supply volume keeps the pressure on pipe arrangement resistance curve F to supply water.Water supply volume few, described later flow switch then stops when detecting few water yield using state.

Fig. 2 represents the system construction drawing of the example of the pump installation arranging 1 playscript with stage directions inventive embodiments.2-1,2-2 are gate valve, and 3 is the pump driven with motor 4, and the suction side of this pump is connected with side, water source via suction pipe 1.Side, water source accepts the supply from total feed pipe under direct-connected mode, not shown herein.Accept the supply of water from water tank under water tank mode, not shown herein.5 is flap valve, and 6 is feed pipe, and 7 are forbay and are arranged on the position close to pump of feed pipe 6.8 is pressure sensors sending the signal of telecommunication according to the pressure at this place that this feed pipe 6 possesses.By the discharge pressure (such as discharge pressure is certain, and prediction terminal pressure is certain) of this sensor control pump.

And then, need side when the terminal of this feed pipe 6 is direct-connected, be connected with needing side feed pipe and such as the water tap of condominium etc. supplied water.When high level cistern formula, side feed pipe is needed to be connected high-level tank water with this.9 is flow switch, detects that few water yield using state (such as 5 ~ 10L/min) sends the signal stopping pump.

INV is the main body of the variable speed drive device (inverter) being equipped with the microprocessor (not shown) driving above-mentioned motor 4, accepts the supply of power supply via residual current circuit breaker ELB from mains side.Variable speed drive device INV supplies the running driven by power pump 3 of certain frequency to motor 4, and current sensor built-in in revolution electric current variable speed drive device now detects.Current sensor is built in variable speed drive device thus not shown, and represents with leading to the current sensor 10 that the power feed line of motor 4 is installed in principle for the ease of understanding.Current sensor 10 as circle frame surround shown in form by leading to the current transformer that the power feed line of motor 4 is arranged, the current value detected is aftermentioned at the handling part C(of variable speed drive device INV) in process.

CONS is the guidance panel arranged in variable-ratio control device INV, is the setup unit of variable-ratio control device INV.Guidance panel CONS possesses display part, operating portion, and for identifying the numbering of the machine or other devices when there is operation mode (manually, automatically) decision-making function, individual operation (running of the machine), multiple stage running (running of the n platform connected with cable) selection function, the running of IDNO.(multiple stage), for starting the set-up function of stopping, pressure controlled parameter etc., possess pressure signal that these setting values of storage and pressure sensor detect, the storage part (such as EEPROM) of current signal that current sensor detects etc.

Fig. 3 represents the details of guidance panel CONS, and Fig. 4 represents its function.In Fig. 3, there is in guidance panel CONS display part 30 and operating portion, 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, when being pressed at every turn, switching and selects MAN(manual)/AUTO(is automatic) pattern, function key 36 is selected by the several functions in each pattern of selecting.Function key 36 also selects one in multiple function when being pressed at every turn.When pressing function key 36, switch between Presentation Function and setting parameter function at every turn.The contact-making switch of key 34, lower key 35 on operating when determining the setting numerical value of various parameter, the setting value of operation is set by the operation of storage key 33 and is stored into storage part (memory) M.Wherein, guidance panel CONS can separate with variable-ratio control device INV, also can be one.

In Fig. 4, when have selected manual operation pattern, pump installation operates when pressing RUN key 31, stops when pressing STOP key 32.About inverter frequency, initial value is prestored to storage part M, is read when pressing RUN key 31, to show and with this frequency run at display part 30.Change more this inverter frequency of new settings when pressing key 34 and lower key 35 at every turn.

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

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

And then, when multiple stage pump installation described later is set, set the maximum speed of each pump installation and minimum speed, increase the number of units of the revolution electric current of condition as number of units when increasing the number of units of pump installation and increase electric current, reduce the number of units of the revolution electric current of condition as number of units when reducing the number of units of pump installation and reduce electric current (reference Fig. 8).

Under automatic operation mode, prepare the function (FUNC) of individual operation and multiple stage running as shown in Figure 4.The communication terminal S2 of the variable-ratio control device INV of Fig. 2 becomes individual operation when disconnecting, and when communication is connected with cable with terminal S2, allows the running of the multiple stage connected.Wherein, communicate between communication terminal S2, no matter this communication is wired, wireless, cable can be replaced to connect by parameter.In addition, when the multiple stage of more than 3 operates, variable-ratio control device INV arranges the terminal S2 of necessity of more than 2.

In the setting parameter undertaken by FUNC key 36, prepare authorized pressure setting, frequency setting, host setting, when increasing from the setting of machine setting, main frame candidate, number of units and number of units minimizing time the order from machine set, change parameter when at every turn pressing FUNC key 36.

In authorized pressure and frequency setting, as mentioned above by FUNC key 36 selection pressure or frequency, on passing through when display part 30 shows initial value, the operating and setting starting pressure of key 34 and lower key 35 or inverter frequency etc., store by storage key 33.In host setting, by the operating and setting of upper key 34 and lower key 35 as the identiflication number (IDNO.) of the pump installation of main frame, store by storage key 33.From in machine setting, set the identiflication number of the pump installation beyond main frame, store by storage key 33.Main frame candidate from machine setting, the situation next but one that breaks down of setting main frame becomes the identiflication number from machine of main frame, stores by storage key 33.

When the multiple stage of above-mentioned more than 3 operates, identify it is the machine or other devices by identiflication number IDNO..IDNO. preset as above-mentioned parameter, when n platform, be suitably set as 1 respectively, 2,3 ... n.Such as, IDNO.1 is main frame, and other are from machine.In addition, for convenience of explanation, be set as that the device of the IDNO.1 of main frame is when starting conditions is set up, and first starts running, after becoming multiple stage running, also finally stop even if stop condition is set up.Wherein, no matter wired this communication is, wireless, cable can be replaced to connect by parameter.

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

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

When bringing into use, when connecting the mains side residual current circuit breaker ELB shown in Fig. 2, program work.First, when step 500 starts, perform initial treatment in step 501, in the setting process of step 502 execution parameter.In initial treatment, perform register, insert various process 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 is then individual operation, and the situation of connection is then multiple stage running.

In setting parameter process, set above-mentioned parameter with above-mentioned CONS.Set above-mentioned initial value, carry out running and prepare.Allow to insert in step 503,504, the insertion process shown in set-up dirgram 7.Certainly, insert, perform the process after step 700.

INT0 after step 700 inserts in process, as shown in Fig. 7 (A), in step 701, determines whether the key switch pressing Fig. 2 or Fig. 3.The result judged, if do not pressed, advances to step 702, such as, carry out the display of the pressure that initial value determines etc., step 709 perform from insert process return insertion before the RETI process of process.

If the result of determination of step 701 for pressing key switch, then advances to step 703, judge whether the key switch (Fig. 3) pressed is parameter modification key.Step 705 is advanced to, execution parameter setting (represent and can change) process and the stores processor (step 706,707) to memory when being parameter modification key.Its store status is preserved in fig. 8.Like this, the on-stream setting also can carrying out parameter is changed.

INT1 after step 710 inserts in process, as shown in Fig. 7 (B), carries out inspection, the supervision of fault in step 711.The communication terminal S2 performing variable-ratio control device INV in step 712 is the judgement connecting or disconnect, and performs transmission and reception process when connection, if be automatic operation mode, then and setting data in the TAN/FUK parameter of the memory 103 of Fig. 8.

Such as, if non-connection cable, then setting data 00H on communication terminal S2.It represents individual operation and the machine running.If communication terminal S2 is connected with cable, then setting data 0FFH.It represents the running of multiple stage running and the n platform shown in Fig. 4.In addition, the communication with other devices is carried out, after the running of each in each IDNO., the state of stopping are stored into memory 114.

In step 713, the signal of detected pressures sensor, inverter current and frequency, will simulate register AN0(pressure), AN1(electric current) and the data of ongoing frequency fANS be saved in respectively in memory M108, M114, M111, M10, M14, M12.Then, the process before returning insertion is processed in step 714 from inserting.

Now, namely operation mode parameter MAN/AUTO is set to MAN manually.

In the step 505 of Fig. 5, be judged to MAN and advance to after step 506 performs manual operation process to return step 505.Said manual operation process herein refers to when pressing above-mentioned RUN key switch and operates, and stops when pressing STOP key switch, with the process of upper and lower key switch setting inverter frequency.

Then, explanation operation mode parameter MAN/AUTO sets or changes to the situation of AUTO.The judgement of step 505 is AUTO and advances to step 507.Determine whether to press RUN key switch herein.(YES) then advances to next step 508 and starts automatic running if YES.(NO) then performs this process until becoming is (YES) if NO.In step 508, perform TAN/FUK judgement, be namely individual operation or multiple stage running judgement, advance to step 511 when individual operation, multiple stage running when advance to step 509.In step 509, judge that the machine is main frame or from machine by above-mentioned IDNO..The result judged, if main frame then advances to step 511, is then advance to step 510 from machine, determines whether the operation instruction of from host herein.There is operation instruction then to advance to step 511, then return step 508 without operation instruction, perform process during this period until there is operation instruction.

In step 511, judge whether as starting pressure (H4) below pressure of supply water that pressure sensor detects.If for below H4, advance to step 512 and make to pump up dynamic.Then, reading goal pressure H0(in step 513,514,515 from storage part is initial value H4 for the first time, and second time plays the goal pressure for step 526 upgrades.), the pressure of supply water reading 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 charts.), two data (H and H0) are compared.Result relatively, if H0+ α is <H, advances to step 516.In step 516, set low-limit frequency as described below, judge that the inverter frequency of current running is whether as low-limit frequency.The result judged, 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) illustrates for n=2 platform.(with reference to Fig. 9) details are describing afterwards, and the establishing method of low-limit frequency when number of units reduces is described herein.1. on 1 pump performance curve and n platform pump constant speed drive time, on pump synthesis performance curve map, describes 1 running time and n platform operate time pipe arrangement resistance curve F, J.2. the intersection point Ht(of pump performance curve A and pipe arrangement resistance curve J during highest frequency running is as pressure set points when number of units increases, number of units reduces) be that the number of units increasing condition as number of units when making pump installation be increased to 2 from 1 increases pressure and reduces pressure as the number of units that number of units when making pump installation reduce to 1 from 2 reduces 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.

In Fig. 9 (aftermentioned), the pipe arrangement resistance curve F when 1 pump running is with on the intersection point O5 of the straight line making water yield Qt/2 extend upward, and describe pump performance curve K, the frequency f G meeting it is low-limit frequency, and revolution electric current is now IG.These Ht, fG are stored into storage part by guidance panel in advance, or computing setting in the process of step 516.These setting value Ht, It, IG are pre-stored in memory M50, M52, M53, M117, M119, M120 as parameter.

Above-mentioned explanation pressure representative number of units increase and decrease, but operation of inverter electric current also can be used to replace pressure.In Fig. 9, line segment M is current curve when pump installation is operated with inverter frequency f1, and it is that number of units increases electric current (being increased to 2 from 1) with the intersection I t of the straight line making water yield Qt extend upward.Equally, line segment L is current curve when pump installation is operated 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).

For pump installation number of units increase time, number of units reduce time condition from pressure, pressure is shared for multiple stage pump installation, so it is uniform pressure that the number of units as number of units increase condition can be made to increase pressure and reduce pressure as the number of units of number of units minimizing condition.When number of units for pump installation increases, the condition of number of units when reducing from the revolution electric current of pump installation, because revolution electric current is the revolution electric current of 1 pump installation, need to determine the revolution electric current of observing which platform pump installation.

Be the example of n=2 platform in the present embodiment, increase condition as number of units, judge that whether reaching number of units in the revolution electric current of the First pump installation of running increases electric current.Number of units increases the maximum value of the revolution electric current shown in pump service performance figure (Fig. 9) that electric current is 1 pump installation and above-mentioned It.On the other hand, reduce condition as number of units, 2, in running, judge whether the revolution electric current of 1 pump installation of a side that will reduce reaches number of units and reduce electric current.Herein, number of units reduces the minimum value shown in pump service performance figure and IG that electric current is 1 pump installation.That is, the number of units of pump installation increases electric current and number of units to reduce electric current different.

In addition, in this example with n=2 platform illustrate, and 3 more than also can use the same method determine or set number of units increase time and number of units minimizing time pressure, revolution electric current, number of units minimizing time low-limit frequency.

Return step 517, in step 517, perform the judgement of the judgement of TAN/FUK, i.e. individual operation or multiple stage running as described above, advance to step 522 when individual operation and perform process of slowing down.

Advancing to step 518 when multiple stage running, to perform the machine be main frame or the judgement from machine.The result judged, if main frame, then advances to step 519 and performs number of units and reduce the condition judgement of whether setting up.When for being (YES), advancing to step 520 and reducing instruction for sending number of units from machine, advancing to step 528.What number of units reduced instruction sends order, such as, in the process of step 519, performs from the order after arriving first by running.Step 528 is advanced to when no (NO).

Said number of units minimizing condition refers to following process herein.1. the operating condition from machine beyond the machine (IDNO.1) is checked by each IDNO., obtain operating number, therefrom the pump installation operated 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 the storage part prestored increases pressure, number of units minimizing pressure (shared when number of units increases, number of units reduces).Similarly, set or read low-limit frequency when number of units reduces from the storage part prestored.In addition, setting or from the storage part that prestores read that number of units increases electric current, number of units reduces electric current (when number of units increases, number of units reduce time current value different) replace 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 pressure, or this state is through the stipulated time.3. using the number of units shown in Fig. 9 to reduce electric current I G replaces number of units to reduce pressure, and inverter frequency becomes low-limit frequency, and revolution electric current becomes number of units and reduces below 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 the side first set up to reduce condition as number of units and set up.

Return Fig. 6, be judged in the result of determination of step 518 to advance to step 521 from machine, perform the judgement whether having the number of units of from host to reduce instruction.When for being (YES), advancing to step 525 and performing stopping process (number of units minimizing), return the process after step 505 continues.When being judged to be no (NO), advance to step 528.

In step 522, reduce aHz(such as 0.1Hz from ongoing frequency f) perform process of slowing down, repeatedly perform ongoing frequency in step 523 and whether arrive the confirmation process of instruction frequency until arrive instruction frequency.In step 524, confirm that the using state of water is whether few from flow switch, in the situation (YES) that the using state of water is few, perform in step 525 and stop processing and returning step 505.Not, in few situation (NO), advance to step 528, determine whether herein to press STOP key.The result judged, advances to step 525 as described above and performs stopping process when pressing.When not pressing, return the process after step 513 also continues.

Return Fig. 5, the result that step 515 judges if H0-α <=H<=H0+ α, then the goal pressure update process that the terminal pressure of use prior art performing step 526 necessarily controls.The method obtaining goal pressure uses arithmetic expression or the table of pressure parameter and frequency parameter.Then, step 527 performance objective pressure upgrade needed for and for pressure of supply water stablize required stipulated time Δ t stand-by period process, advance to step 528.

The result of the judgement of step 515, if H0-α >H then advances to step 529.Herein, current inverter frequency is judged whether as highest frequency.The result judged, if become highest frequency, advances to step 532, if do not become highest frequency, advances to step 530, the speedup process after execution.As shown in Figure 6, in the speedup process of step 530, aHz(such as 0.1Hz is added to ongoing frequency f) perform speedup process, if repeatedly perform ongoing frequency in step 531 whether arrive the confirmation process of instruction frequency until arrive instruction frequency arrival, advance to step 528.

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

In the step 532 of Fig. 6, herein, performing the judgement of the judgement of TAN/FUK, i.e. individual operation or multiple stage running as described above, performing speedup process for advancing to step 530 when individual operation.Advance to step 533 when multiple stage running, performing the machine is main frame or the judgement from machine.The result judged, if main frame then advances to step 534, performs the judgement whether number of units increase condition is set up.For advancing to step 535 when being (YES), increasing instruction for sending number of units from machine, advancing to step 528.What number of units increased instruction sends order such as in the process of step 534, performs by the order from small to large of the numbering in next running.Step 528 is advanced to for when no (NO).

Said number of units increases condition is herein following process.1. the operating condition from machine beyond the machine (IDNO.1) is checked by each IDNO., obtain operating number, therefrom elect the less pump installation of numbering as pump that next number of units increases (instruction).According to operating number, setting or reading above-mentioned number of units from the storage part prestored increases pressure, number of units minimizing pressure (shared when number of units increases, number of units reduces).Similarly, set or read highest frequency when number of units increases from the storage part prestored.In addition, setting or from the storage part that prestores read that number of units increases electric current, number of units reduces electric current (when number of units increases, number of units reduce time current value different) replace 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 pressure, or this state is through the stipulated time.3. using the number of units shown in Fig. 9 to increase electric current I t replaces number of units to increase pressure, and inverter frequency becomes highest frequency, and revolution electric current is that number of units increases more than electric current I t, or this state is through the stipulated time.In above-mentioned 2 and 3, number of units increase condition is all set up, and adopts the one first set up to increase condition as number of units and sets up.

Return Fig. 6, in the result of determination of step 533, be judged to advance to step 536 from machine, perform the judgement whether having the operation instruction of from host.The result judged, for advancing to step 535 when being (YES), sending number of units increases instruction and advances to step 528.When for no (NO), return the process after step 508 also continues.

As mentioned above, arrange and have the n platform pump installation of same function, performance, carry out terminal pressure and necessarily control lower constant speed drive, the number of units increase and decrease simultaneously carrying out the pump installation of n platform setting operates.

Namely, maximum speed and the minimum speed of each pump installation is set by guidance panel, electric current and number of units minimizing electric current is increased with the number of units of revolution electric current, the pump installation of the n platform connected with cable between each pump installation can operably be formed, variable-ratio control device is according to supplying water load, when (n-1)th pump installation becomes maximum speed, and revolution electric current reach number of units increase electric current number of units increase condition time, exporting number of units increase instruction makes pump installation be increased to n platform from n-1 platform, when n-th pump installation becomes minimum speed, and revolution electric current reach number of units reduce electric current number of units reduce condition time, exporting number of units minimizing instruction makes pump installation be reduced to n-1 platform from n platform.

In addition, when the one in the revolution electric current and discharge pressure of above-mentioned (n-1)th pump installation first reaches number of units increase condition, pump installation is made to be increased to n platform from n-1 platform, when the one in the revolution electric current and discharge pressure of above-mentioned n-th pump installation first reaches number of units minimizing condition, pump installation is made to reduce to n-1 platform from n platform.

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

And then the variable-ratio control device INV of all pump installations (device) possesses the handling part of the increase of the number of units of main frame, the increase reducing handling part and the number of units judged, minimizing instruction, and possess the increase of the number of units from machine, the handling part of minimizing command reception wait and perform the increase of number of units, the handling part of minimizing.These handling parts are expressed as C in the INV of Fig. 2, in INV1, INV2 of Figure 10 (aftermentioned), be expressed as C1, C2.

The device being set to main frame performs the handling part of above-mentioned main frame, be set to perform the above-mentioned handling part from machine from the device of machine, be set to the increase of device in number of units of main frame, reduce in determination processing when the increase of number of units, minimizing condition are set up, to being set to the increase, the minimizing instruction that send number of units from the device of machine, be set to from the device of machine number of units increase, reduce command reception etc. pending, when receiving increase, the minimizing instruction of number of units from the device being set to main frame, perform the increase of number of units, minimizing.

Then, embodiment when n platform said pump device is set is described in detail.For convenience of explanation, n platform is for 2 explanations.During facility planning, be planned to for the maximum water supply volume of supply equipment for water load, arrange n platform pump installation, n platform pump installation operates by oneself respectively and carries out Stress control.Specifically, in this water system, if the discharge rate of 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 decimal point 1 round up, determine n, n platform be set.Like this, without the need to manufacturing and designing the special water system of supply equipment, doubly can change constructing system by the n of pump installation standard items, therefore, it is possible to shorten the manufacture number of days of design man-hour and private water supply system, and can standard items be used, so it can be made to become cheap.

Fig. 9 represents pump performance curve when arranging 2 said pump devices and operate simultaneously.The performance that chain-dotted line represents is the performance curve of the pump installation shown in Fig. 1.Performance curve shown in solid line makes that the pressure of this performance curve is certain, the water yield 2 times display, is to make 2 parallel synthesis performance curves when operating.Certainly, n platform parallel running synthesis performance curve can be become when n platform is set, not shown herein.

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

In addition, pump performance curve G is the synthesis performance making the parallel running of pump performance curve C (when operating with frequency f 2) 2.Pump performance curve H is the synthesis performance making the parallel running of pump performance curve B (when operating with frequency f 0) 2.Pump performance curve I is the synthesis performance making the parallel running of pump performance curve A (when operating with frequency f 1) 2.That is, 2 when operating, with the variation of water supply volume, resistance curve J operates simultaneously.Further, because 2 identical, with roughly the same FREQUENCY CONTROL, pressure of supply water becomes the pressure on resistance curve J.Because pressure of supply water is controlled as the pressure on resistance curve J, the frequency of 2 is roughly equal, so be called constant speed drive herein.Constant speed drive is carried out, so pressure oscillation when preventing water supply volume from changing can be realized because 2 pump installations operate by oneself respectively and carry out Stress control.Be 1 speed change in the past, other constant speed drives.Its concrete control treatment is as follows.

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

Be set to the device always selection pressure controlling functions of main frame, be set to from the device of machine select the pressure control function selected by above-mentioned selection unit and non-pressure (constant speed) controlling functions any one, be set to from the device of machine number of units increase, reduce command reception etc. pending, when receiving increase, the minimizing instruction of number of units from the device being set to main frame, perform the increase of number of units, minimizing, operate with any one in the pressure control function selected and non-pressure (constant speed) controlling functions when increasing number of units.

Figure 10 is system construction drawing when arranging 2 identical pump installations.Arrange Fig. 2 of the system construction drawing of 2 pump installations, the performance of the part that same-sign represents, function are identical.In addition, 1 expression No. 1 machine, 2 of suffix, secondary numbering represents that No. 2 machines are identical.Suction pipe 1 and feed pipe 6 make No. 1 machine No. 2 machines conflux.The communication terminal S2 of INV1 with INV2 cable S5 is connected.Thus, the effect playing multiple stage running during running is automatically selected as mentioned above.

Current sensor is built in variable speed drive device thus not shown, and represents with leading to current sensor 10-1,10-2 that the power feed line of motor 4-1,4-2 is installed in principle for the ease of understanding.Surround the current sensor 10 that represents similarly with circle frame in this current sensor 10-1,10-2 and Fig. 2, forming by leading to the current transformer that the power feed line of motor 4-1,4-2 is arranged respectively, omitting detailed icon herein.The current value detected supplies handling part C-1, C-2 of variable speed drive device INV1, INV2 respectively, processes.

Starting pressure described above, all parameters such as increase and decrease pressure, goal pressure etc., pump performance, pressure controling mode are all identical for 2 (being n platform when extending to n platform), the increase carrying out adjoint water is started successively, the number of units increase and decrease that the minimizing of adjoint water stops successively operating, and carries out the constant speed drive necessarily controlled along the terminal pressure of resistance curve.Like this, simultaneously start, simultaneously stop eliminate improper.

When safeguarding in automatically operating, can suitably stop by pressing STOP key 32.Certainly, also again can operate by pressing RUN key 31.And then, can also carry out while carrying out running automatically and safeguard.That is, all devices possess individual operation and multiple stage operation mode when automatically operating, and the device carrying out safeguarding selects individual operation pattern, and other select multiple stage operation modes.If by day or use water less time at night implement, then can check the operating condition of the device being set as individual operation pattern, malfunction etc.If now increased with water, owing to being set as that other devices of multiple stage operation mode operate automatically, cutting off the water supply without the need to worrying, safeguarding and becoming easy.

More than illustrate to arrange 2 for example, certainly, the n platform of more than 2 arranges the constant speed drive that the terminal pressure that also can realize n platform necessarily controls, and can supply water with the n water yield doubly.

(embodiment 2) then, about embodiments of the invention 2, uses Figure 11 ~ Figure 17 explanation further.The part shared with embodiment 1 omits the description.

In Figure 11, when have selected manual operation pattern, pump installation operates when pressing the RUN key 31 of Fig. 3, stops when pressing STOP key switch 32.The parameter of inverter frequency during manual operation passes through the operating and setting of function (FUNC) key 36, upper key 34 and lower key 35, and initial value is pre-stored in storage part M.

When have selected automatic operation mode, pump installation starts automatic running when pressing RUN key 31, stops when pressing STOP key 32.Even if select automatic operation mode, be false as long as pressure of supply water becomes starting pressure (being set as initial value in advance in parameter) starting conditions below, just do not start running.Manually (MAN) (setting in the parameter in advance) setting of above-mentioned starting pressure.

Under automatic operation mode, prepare the function (FUNC) of individual operation and multiple stage running as shown in figure 11.The communication terminal S2 of the variable-ratio control device INV of Fig. 2 becomes individual operation when disconnecting, and when communication is connected with cable with terminal S2, allows the running of the multiple stage connected.Wherein, communicate between communication terminal S2, no matter this communication is wired, wireless, cable can be replaced to connect by parameter.In addition, when the multiple stage of more than 3 operates, variable-ratio control device INV arranges 2 terminal S2.

In the setting parameter undertaken by FUNC key 36, prepare authorized pressure setting, frequency setting, host setting, when increasing from the setting of machine setting, main frame candidate, number of units and number of units minimizing time the order from machine set, change parameter when at every turn pressing FUNC key 36.

In authorized pressure and frequency setting, as mentioned above by FUNC key 36 selection pressure or frequency, by the operating and setting starting pressure of upper key 34 and lower key 35 or inverter frequency etc., store by storage key 33.In host setting, by the operating and setting of upper key 34 and lower key 35 as the identiflication number (IDNO.) of the pump installation of main frame, store by storage key 33.From in machine setting, set the identiflication number of the pump installation beyond main frame, store by storage key 33.Main frame candidate from machine setting, the situation next but one that breaks down of setting main frame becomes the identiflication number from machine of main frame, stores by storage key 33.In setting from the order of machine, by the operation of upper key 34 and lower key 35, order from the running of machine when operating with the identiflication number setting number of units increase of pump installation and when number of units minimizing operates and stopping rotation sequentially and the pattern of rotation of operating, store by storage key 33.

When the multiple stage of above-mentioned more than 3 operates, identify it is the machine or other devices by identiflication number IDNO..Identiflication number IDNO. as mentioned above in advance as setting parameter, when n platform, be suitably set as 1 respectively, 2,3 ..., n.Such as, identiflication number IDNO.1 is main frame, and other identiflication numbers are from machine.In addition, first start running when starting conditions is set up with the device being set to the IDNO.1 of main frame, after becoming multiple stage running, even if stop condition sets up the also last mode stopped, the rotation of the order of setting main frame.

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

When bringing into use, when connecting the mains side residual current circuit breaker ELB shown in Fig. 2, program work.First, when step 1500 starts, perform initial treatment in step 1501, in the setting process of step 1502 execution parameter.In initial treatment, perform register, insert various process 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 is then individual operation, is multiple stage running when connection.

In setting parameter process, above-mentioned parameter setting process is set by above-mentioned CONS.Set above-mentioned initial value, in addition, in the ONSTB of memory M54 and M121, set the device of the next device such as IDNO.2 started when number of units increases, in the OFFSTB of M55, M122, set the device of the next device such as IDNO.2 stopped when number of units reduces, carry out running and prepare.Allow to insert in step 1503,1504, prepare the insertion process shown in Figure 14.Certainly, insert, perform the insertion process after step 1700.

INT0 after step 1700 inserts in process, as shown in Figure 14 (A), in step 1701, determines whether the some key switches pressed in Fig. 3.The result judged, if do not pressed, advances to step 1702, such as, show at display 30 pressure etc. that initial value determines, step 1711 perform from insert process return insertion before the RETI process of process.

If the result of determination of step 1701 for pressing key switch, then advances to step 1703, judge whether the key switch (Fig. 3) pressed is parameter modification key.When being parameter modification key, advance to step 1707, execution parameter setting (represent and can change) process and the stores processor to memory (storage part M), its store status as shown in figure 15.Like this, the on-stream setting also can carrying out parameter is changed.

If be not parameter modification key in the judgement of step 1703, advance to step 1704, whether herein, performing the key switch pressed is main frame/from the determination processing of machine set condition (such as by the operation of the upper key 34 of Fig. 3, lower key 35, FUNC key 36).Advancing to step 1706 for when no (NO), carrying out main frame or the setting from machine for advancing to step 1705 when being (YES).Such as, consider to make IDNO.1 machine change to from machine from main frame, make IDNO.2 machine from when changing to the situation of main frame from machine, read respective data at display 30, by pressing upper key 34 simultaneously, lower key 35, FUNC key 36 make state from mian engine changeover for switch to main frame from machine or from from machine.Then, in memory M120, M53 of IDNO.1 machine, store the data SLE represented from machine, in memory M120, M53 of IDNO.2 machine, store the data MAS representing main frame.

INT1 after step 1720 inserts in process, as shown in Figure 14 (B), carries out inspection, the supervision of fault in step 1721.The communication terminal S2 performing variable-ratio control device INV in step 1722 is the judgement connecting or disconnect, and performs transmission and reception process when connection, if operation mode then arranges the data of TAN/FUK parameter in memory M3, M103 automatically.Such as, if the non-connection cable of communication terminal S2, then setting data 00H.It represents the running of individual operation and the machine.If communication terminal S2 is connected with cable, then setting data 0FFH.It represents the running of multiple stage running and the n platform shown in Figure 11.In addition, to carry out with the communication of other devices and after the running of each in each IDNO., the state of stopping are stored into memory 114.

In step 1723, the signal of detected pressures sensor and frequency, will simulation register in AN0(pressure) and the data of ongoing frequency fANS be stored in memory M108, M111.Then, the process before returning insertion is processed in step 1724 from inserting.

Now, namely operation mode parameter MAN/AUTO is set to MAN manually.

In the step 1505 of Figure 12, be judged to MAN and advance to after step 1506 performs manual operation process to return step 1505.Said manual operation process herein refers to when pressing above-mentioned RUN key switch and operates, and stops when pressing STOP key switch, with the process of upper and lower key switch setting inverter frequency.

Then, illustrate operation mode parameter MAN/AUTO setting or the situation changing to AUTO.The judgement of step 1505 is AUTO and advances to step 1507.Determine whether to press RUN key switch herein.(YES) then advances to next step 1508 if YES, starts automatically to operate.(NO) then performs process herein repeatedly until becoming is (YES) if NO.

In step 1508, perform TAN/FUK judgement, be namely individual operation or multiple stage running judgement, advance to step 1511 when individual operation, multiple stage running when advance to step 1509.In step 1509, judge that the machine is main frame or from machine according to above-mentioned IDNO..The result judged, if main frame then advances to step 1511, is then advance to step 1510 from machine.Herein, the operation instruction of from host is determined whether.If there is operation instruction, advance to step 1511, then return step 1508 without operation instruction, perform process during this period until there is operation instruction.

In step 1511, judge whether as starting pressure (H4) below pressure of supply water that pressure sensor detects.If be below starting pressure H4, then advance to step 1512 and make to pump up dynamic.Then, in step 1513,1514,1515, reading goal pressure H0(from storage part is initial value H4 for the first time, and second time plays the goal pressure for step 1526 upgrades.), the pressure of supply water reading 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 charts.), and two data are compared.Result relatively, if H0+ α is <H, advances to step 1516.In step 1516, set low-limit frequency as described below, judge that the inverter frequency of current running is whether as low-limit frequency.The result judged, 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 the whole speed change of multiple stage pump) illustrates for n=2 platform.(with reference to Fig. 9) details are described below, and the establishing method of low-limit frequency when number of units reduces is described herein.1. on 1 pump performance curve and n platform pump constant speed drive time, on pump synthesis performance curve map, describes 1 running time and n platform operate time pipe arrangement resistance curve F, J.2. pump performance curve when operating with highest frequency and the intersection point Ht of pipe arrangement resistance curve for number of units increase, number of units reduces pressure, 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 meeting it is low-limit frequency.These Ht, fG are prestored to memory.Or also can computing setting in the process of step 1516.In addition, in this example, with n=2 platform illustrate, and 3 more than also can use the same method determine or set number of units increase, number of units minimizing time pressure, number of units minimizing time low-limit frequency.

(situation of the non-constant speed drive of multiple stage pump speed change and constant speed) illustrates for n=2 platform.(with reference to Figure 16) details are described below, and the establishing method of low-limit frequency when number of units reduces is described herein.First, use pump performance curve map in advance, such as shown in figure 16, the synthesis performance curve map of pump during parallel running is mapped.In this figure, goal pressure during parallel running is between water yield Q1 ~ Q6, links coordinate O1(low-limit frequency f5, lower limit goal pressure H1), coordinate O6(highest frequency f1+f1, lower limit goal pressure H5) the such as equation of line segment.Owing to being equation, low-limit frequency f5, lower limit goal pressure H1, highest frequency f11, lower limit goal pressure H5, closing presure HS are prestored to storage part as parameter.And low-limit frequency f5 uses lower limit goal pressure H1, highest frequency f1+f1 when pump closing presure HS, 2 runnings, presses $f5=(f1+f1)\&times;\sqrt{(H1/\mathrm{HS})}$ Obtain.

In the parameter processing of the step 1502 of Figure 12 and the step 1707 of Figure 14, perform this process and be stored into storage part.

In step 1517, perform as described above the judgement of TAN/FUK, be namely individual operation or multiple stage running judgement, for advance to when individual operation step 1522 perform slow down process.Step 1518(Figure 13 is advanced to when multiple stage running) to perform the machine be main frame or the judgement from machine.The result judged, if main frame, then advances to step 1519 and performs number of units and reduce the condition judgement of whether setting up.Reducing instruction for advancing to step 1520 when being (YES) to sending number of units from machine, advancing to step 1528.

The number of units that represents Fig. 1 reduces sending sequentially of instruction.Figure 17 represents that pump installation is the example of 4.Such as, in the process of step 1519, read the data of the OFFSTB of memory M120, halt instruction is performed for this IDNO. from machine.Such as, if the next device stopped is IDNO.2, it is made to stop.Then, advance to step 1520A and perform rotation process, advance to step 1528.In the rotation process of step 1520A, read the data of the device RUN operated stored in M101, compare with the data of the OFFSTB of memory M122, the Data Update of the IDNO. device stopped as the next one by the device of the IDNO. of the lowest number after the data of OFFSTB from the data of RUN is the data of OFFSTB, is kept in memory M53, M120.

Like this, when then performing the number of units minimizing process of step 1520, the IDNO. device of more bigger than the IDNO. device stopped before (numbering number is large) stops, and carries out rotation.Certainly, IDNO.1 machine is main frame, in the parameter processing of step 1502, be redefined for first running, finally stop, in the process of step 1520A, when the data of RUN comprise the data fit of multiple stage device of IDNO.1 machine, perform and make the process of IDNO.1 machine not included 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, IDNO.3 next one stops: the device of IDNO.2 state 2IDNO.2 stops.Rotating device: the device that IDNO.1, IDNO.3 next one stops: IDNO.3(rotating device is IDNO.1, IDNO.3, and when multiple stage running, forbid stopping the IDNO.1 as main frame, a upper next device stopped is IDNO.2, rotating device IDNO.3 is the device of less than IDNO.2 No., and IDNO.3 is chosen as the next device stopped.) state 3IDNO.3 device stop.The device that rotating device: the IDNO.1 next one stops: IDNO.1.

Above-mentioned action is described in detail as described below with Figure 17.Pattern 1 pump is increased to 1 from 0, reduces to 0 (with reference to Figure 17) rotating device: IDNO.1(1 prow first operates from 1) → No. 1 machine stops becoming 0 → IDNO.2 → No. 2 machine and stops becoming 0 → IDNO.3 → No. 3 machine and stop becoming 0 → IDNO.4 → No. 4 machine and stop becoming 0 → IDNO.1.

In this situation, forbid that IDNO.1(is from machine) stopping, 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 first breaks down significantly improves, and other probability broken down from machine reduce, and putting maintenance into practice successively from main frame, improves maintainability.

Pattern 2 pump is increased to 2 from 1, reduces to 1 (with reference to Figure 17) rotating device from 2: IDNO.1(1 prow first operates) → IDNO.1(remains in operation)+IDNO.2(2 machine follows) → IDNO.1(remains in operation) → IDNO.1(remains in operation)+IDNO.3(3 machine follows) → IDNO.1(remains in operation) → IDNO.1(remains in operation)+IDNO.4(4 machine follows) → IDNO.1(remains in operation) return initial.The next device stopped: the device first operated except No. 1 machine.

Mode 3 pump is increased to 3 from 2, reduces to 2 (with reference to Figure 17) rotating devices: IDNO.1(1 prow first operates from 3)+IDNO.2 → IDNO.1(1 prow first operates)+IDNO.2+IDNO.3(3 machine follows) → IDNO.1(1 prow first operates)+IDNO.3(3 machine remains in operation) → IDNO.1(1 prow first operates)+IDNO.3(3 machine remains in operation)+IDNO.4(4 machine follows) → IDNO.1(1 prow first operates)+IDNO.4(4 machine remains in operation) → IDNO.1(1 prow first operates)+IDNO.4(4 machine remains in operation)+IDNO.2(2 machine follows) the next device stopped: the device first operated except No. 1 machine.

The judgement of the step 1519 of Figure 13 advances to step 1528 when being no (NO).

Said number of units minimizing condition refers to following process herein.1. the operating condition from machine beyond pair the machine (IDNO.1) checks by each IDNO., obtains operating number, is therefrom elected as by the pump installation operated at first and sends the pump that number of units reduces instruction.According to operating number, set or read the increase of above-mentioned number of units, number of units minimizing pressure (shared when number of units increases, number of units reduces) from the memory prestored.Similarly, set or read low-limit frequency when number of units reduces from the memory prestored.2. inverter frequency becomes low-limit frequency, and pressure of supply water becomes number of units and reduces more than pressure, or this state is through the stipulated time.3. the number of units shown in Fig. 9 also can be used 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 advance to step 1521 from machine, perform the judgement whether having the number of units of from host to reduce instruction.When for being (YES), advancing to step 1525, performing and stopping process (number of units minimizing), return step 1505 and continue process thereafter.Step 1528 is advanced to when being judged to be no (NO).

In step 1522, reduce aHz(such as 0.1Hz from ongoing frequency) perform process of slowing down, judge whether ongoing frequency arrives instruction frequency in step 1523, perform and confirm process until arrive instruction frequency.In step 1524, confirm that whether the using state of water is few by flow switch, perform in step 1525 when the using state of water is few and stop processing and returning step 1505.Advance to step 1528 when not being few, determine whether herein to press STOP key.The result judged, when pressing, advances to step 1525 as described above and performs stopping process.When not pressing, return the process after step 1513 also continues.

The result of step 1515 judgement of Figure 12, if H0-α <=H<=H0+ is α, the goal pressure update process that the terminal pressure performing the use prior art of step 1526 necessarily controls.(method obtaining goal pressure uses arithmetic expression or the table of pressure parameter and frequency parameter.) then, step 1527 performance objective pressure upgrade needed for and for pressure of supply water stablize required stipulated time Δ t stand-by period process, advance to step 1528.

The result of the judgement of step 1515, if H0-α >H then advances to step 1529.Herein, current inverter frequency is judged whether as highest frequency.The result judged, if become highest frequency, advances to the step 1532 of Figure 13, if do not become highest frequency, advances to the step 1530 of Figure 13, the speedup process after execution.In speedup process, aHz(such as 0.1Hz is added to ongoing frequency) perform speedup process, perform ongoing frequency in step 1531 and whether arrive the confirmation process of instruction frequency until arrive instruction frequency.If arrived, advance to step 1528.

Herein, the frequency f of variable-speed processing is identical with the fxAUTO of memory M109, uses f for convenience of explanation in flow chart.In addition, above-mentioned α is the dead band of goal pressure, such as, be 1m.In step 1532, perform as described above the judgement of TAN/FUK, be namely individual operation or multiple stage running judgement, perform speedup process for advancing to step 1530 when individual operation.In order to advance to step 1533 when multiple stage operates, to perform the machine be main frame or the judgement from machine.The result judged, if main frame, then advances to step 1534 and performs number of units and increase the condition judgement of whether setting up.When for being (YES), advancing to step 1535 and increasing instruction to sending number of units from machine, advancing to step 1528.

Figure 17 represents that number of units increases sending sequentially of instruction.The figure shows the example that pump installation is 4.Such as, in the process of step 1535, read the data of the ONSTB of memory M121, operation instruction is performed to this IDNO. from machine.Such as, if the device of next running is IDNO.2, then it is made to operate.Then, advance to step 1535A and perform rotation process, advance to step 1528.In the rotation process of step 1535A, read the data of the device STOP of the stopping stored in M102, compare with the data of the ONSTB of memory M121, the Data Update of the IDNO. device operated as the next one by the device of the IDNO. of less than the data of ONSTB No. from the data of STOP is the data of ONSTB, is stored into memory M54, M121.

Like this, when then performing the number of units increase process of step 1535, the IDNO. device running more bigger than the IDNO. device operated before, carries out rotation.Certainly, in the parameter processing of step 1502, the device of next running is set as IDNO.2.

Concrete example is as described below.The device of state 1 rotating device: IDNO.1 next one running: the device running of IDNO.2 state 2IDNO.2.The device of rotating device: IDNO.1+IDNO.2 next one running: if IDNO.3(sets rotating device as IDNO.1, IDNO.2, the device stopped is IDNO.3, IDNO.4, then the device of Last next one running is IDNO.2, the IDNO.3 of arresting stop is the device of less than IDNO.4 No., and IDNO.3 is chosen as the device of next running.The device running of state 3IDNO.3.The device of rotating device: IDNO.1+IDNO.2+IDNO.3 next one running: IDNO.4.The judgement of step 1534 advances to step 1528 when being no (NO).

Said number of units increase condition refers to following process herein.1. the operating condition from machine beyond pair the machine (IDNO.1) checks by each IDNO., obtains operating number, therefrom elects the less pump installation of numbering as the next one and sends the pump that number of units increases instruction.According to operating number, setting or reading above-mentioned number of units from the memory prestored increases pressure (sharing when number of units increases, number of units reduces).Set or read highest frequency when number of units increases from the memory prestored.2. inverter frequency becomes highest frequency, and pressure of supply water is that number of units increases below pressure, or this state is through the stipulated time.3. the number of units shown in Fig. 9 also can be used to increase electric current I t replaces number of units to increase pressure.

The result of the judgement of step 1533, is judged to advance to step 1536 from machine, performs the judgement whether having the operation instruction of from host.The result judged, for advancing to step 1535 when being (YES), performing number of units increases process and rotation process advance to step 1528.When for no (NO), return the process after step 1508 also continues.

As mentioned above, arrange and there is the n platform pump installation of identical function, performance, while carrying out the constant speed drive that terminal pressure necessarily controls, carry out the number of units increase and decrease running of the pump installation of n platform setting.

Then, the embodiment that the situation of n platform said pump device is set is described in detail.For convenience of explanation, n platform is for 2 explanations.

During facility planning, be planned to for the maximum water supply volume of supply equipment for water load, arrange n platform pump, n platform pump installation operates by oneself respectively and carries out Stress control.Specifically, in this water system, if the discharge rate of 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 decimal point 1 round up, determine n, n platform be set.Like this, without the need to manufacturing and designing the special water system of supply equipment, doubly can change constructing system by the n of pump installation standard items, therefore, it is possible to shorten the manufacture number of days of design man-hour and private water supply system, and can standard items be used, so it can be made to become cheap.

Fig. 9 represents the pump performance curve arranged 2 said pump devices carry out constant speed drive (2 all while speed change operate).Performance shown in chain-dotted line is the performance curve of the pump installation shown in Fig. 1.Performance curve shown in solid line makes that the pressure of this performance curve is certain, the water yield 2 times display, is to make 2 parallel synthesis performance curves when operating.Certainly, n platform parallel running synthesis performance curve can be become when n platform is set, not shown herein.

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

In addition, pump performance curve G is the synthesis performance making the parallel running of pump performance curve C (when operating with frequency f 2) 2.Pump performance curve H is the synthesis performance making the parallel running of pump performance curve B (when operating with frequency f 0) 2.Pump performance curve I is the synthesis performance making the parallel running of pump performance curve A (when operating with frequency f 1) 2.That is, 2 when operating, with the variation of water supply volume, resistance curve J operates simultaneously.Further, because 2 identical, with roughly the same FREQUENCY CONTROL, pressure of supply water becomes the pressure on resistance curve J.Because pressure of supply water is controlled as the pressure on resistance curve J, the frequency of 2 is roughly equal, so be called constant speed drive herein.When carrying out constant speed drive, 2 pump installations operate by oneself respectively and carry out Stress control and carry out constant speed drive, therefore, it is possible to realize pressure oscillation when preventing water supply volume from changing.Be 1 speed change in the past, other constant speed drives.

And then, above-mentioned explanation pressure representative number of units increase and decrease, but operation of inverter electric current also can be used to replace pressure.In Fig. 9, line segment M is current curve when pump installation is operated with inverter frequency f1, and it is that number of units increases electric current (being increased to 2 from 1) with the intersection I t of the straight line making water yield Qt extend upward.Similarly, line segment L is current curve when pump installation is operated with inverter frequency fG, and it is that number of units reduces electric current (being increased to 2 from 1) with the intersection I G of the straight line making water yield Qt/2 extend upward.

Figure 16 represents and arranges 2 said pump devices, carries out pump performance curve when non-constant speed drive (1 speed change, 1 constant speed).Performance shown in chain-dotted line is the performance curve of the pump installation shown in Fig. 1.In addition, the part identical with Fig. 9 symbol is identical, therefore omits the description.1 pump arrives highest frequency and becomes 2 when operating simultaneously, and 1 is carried out constant speed drive, and 1 is carried out changed speed operation.Therefore, the Q-H curve A when operating with pipe arrangement resistance curve F and highest frequency f11 and the Q-H performance curve O intersection point O1 of goal pressure H1 now superposing the Q-H performance curve N determined by the low-limit frequency f5 of changed speed operation are the resultant curves of constant speed (performance curve A) and speed change (performance curve N).

The resultant curve of 2 Q-H performance curves when operating with highest frequency f11, for R, is goal pressure H5 with the intersection point O6 of pipe arrangement resistance curve F.State in its way is the resultant curve P that the Q-H performance curve B determined by high-frequency f10 and highest frequency f11 superposes with Q-H performance curve A.The water yield corresponding with intersection point O6, O7 is respectively Q6, Q7.Herein, the starting pressure of First is H4, and second i.e. number of units increase, number of units minimizing pressure are H1.And then goal pressure is set as on resistance curve F.That is, more than 2 when operating, with between water yield Q1 to Q6, the mode that goal pressure becomes H5 from H1 sets simultaneously.

More than illustrate and illustrate the example that pump installation is 2, and make n platform be that the situation of more than 3 has illustrated above, thus omit the description.

Figure 16 is system construction drawing when arranging 2 identical pump installations.Arrange Fig. 2 of the system construction drawing of 2 pump installations, the performance of the part that same-sign represents, function are identical.In addition, 1 expression No. 1 machine, 2 of suffix, secondary numbering represents that No. 2 machines are identical.Suction pipe 1 and feed pipe 6 make No. 1 machine No. 2 machines conflux.The communication terminal S2 of INV1 with INV2 cable S5 is connected.Thus, the effect playing multiple stage running during running is automatically selected as mentioned above.

Starting pressure described above, all parameters such as increase and decrease pressure, goal pressure etc., pump performance, pressure controling mode are all identical for 2 (being n platform when extending to n platform), the increase and decrease of the increase carrying out adjoint water is started successively, the minimizing of adjoint water stops successively number of units and alternate operation, carry out the constant speed drive that necessarily controls along the terminal pressure of resistance curve or non-constant speed drive.This eliminates simultaneously start, stop simultaneously improper.In addition, the homogenization of the running frequency from machine is achieved by carrying out alternate operation when number of units increases and decreases.

And then, when safeguarding in automatically operating, can suitably stop by pressing STOP key.Certainly, also again can operate by pressing RUN key.More than illustrate to arrange 2 for example, certainly, the n platform of more than 2 arranges the constant speed drive that the terminal pressure that also can realize n platform necessarily controls, and can supply water with the n water yield doubly.

Then, other embodiments of embodiment 2 are described.

Embodiment 2 is, in the above-described embodiment, even if stop condition, number of units reduce condition and set up after being set to the main frame running of main frame, also forbids stopping.In the step 1520 of Figure 12, send when number of units reduces instruction and determine whether main frame (the machine), when for the machine, do not send halt instruction and skip step 1528.Like this, for the purposes of water supply volume variation, the pressure oscillation from all stopping when starting to First can be suppressed.

Host setting is arresting stop by embodiment 3, makes it finally stop.In the setting parameter process of the step 1707 of its step 1501 at Figure 12, Figure 14, by numbering maximum IDNO. in each IDNO., main frame is set as main frame, other are set as from machine.Like this, the running rate of the microprocessor processes of rotating device reduces, and response improves.

Embodiment 4, in embodiment 1,3, arranges the setup unit (such as upper and lower key) replacing main frame, can change main frame by this setup unit by outside manual operation.Specific description is described above, therefore omits the description.Like this, become be easy to safeguard.

Embodiment 5, in embodiment 1,3, when carrying out the rotation of number of units increase and decrease, carries out rotation by the device except main frame.Specifically, in the rotation process of the step 1520A of Figure 13,1535A, add the process got rid of from rotation by main frame.Like this, because main frame does not stop, can making that number of units increases and decreases, rotation process becomes stable.In addition, main frame can be identified and from machine.

Embodiment 6 is in embodiment 1,3, if main frame on-streamly to break down (also comprising communication bad), then main frame is changed (replacements) be number compared with main frame from machine minimum device from machine.Specifically, if additional main frame breaks down in the process of the trouble shooting of the step 1721 of Figure 14, be the process of numbering minimum device from machine by mian engine changeover.Like this, when breaking down, also can carry out stable control, can avoid cutting off the water supply.

Claims (13)

1. a water system, it arranges n platform pump installation, and described pump installation comprises the variable-ratio control device of the storage part with each setting value of microprocessor, guidance panel and storage; With the pump that this variable-ratio control device drives; 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 separately operates, and the pump discharge side pressure that described pressure sensor is detected becomes authorized pressure, and the feature of described water system is:

Electric current is increased and number of units reduces electric current by the number of units of the maximum speed of the described each pump installation of described guidance panel setting and minimum speed, revolution electric current, be configured to the running can carrying out connecting the n platform pump installation between each pump installation with cable, described variable-ratio control device is according to supplying water load, and exporting number of units based on following condition to multiple stage pump installation increases instruction or number of units minimizing instruction:

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

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

Current curve when pump installation is operated with inverter frequency f1, be that described number of units increases electric current with the intersection point of the straight line that makes water yield Qt extend upward, current curve when pump installation is operated with inverter frequency fG, the intersection point of straight line extended upward with water yield Qt/2 are that described number of units reduces electric current

The inverter frequency that described inverter frequency f1 is corresponding when being the rotation speed operation making 1 pump with 100%,

Described inverter frequency fG be pipe arrangement resistance curve F when the running of 1 pump with on the intersection point of the straight line making water yield Qt/2 extend upward, describe pump performance curve K, meet the frequency of this pump performance curve K,

The water yield of described water yield Qt corresponding to the intersection point of pump performance curve A when highest frequency operates and pipe arrangement resistance curve J.

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

When the revolution electric current of described (n-1)th pump installation reaches number of units increase condition, make pump installation be increased to n platform from n-1 platform, when the revolution electric current of described n-th pump installation reaches number of units minimizing condition, make pump installation reduce to n-1 platform from 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, there is main frame and the setup unit from machine, by setup unit, 1 in n platform pump installation is set as main frame in advance, other are set as from machine, and described main frame exports number of units increase instruction or number of units minimizing instruction to described from machine according to for water load.

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 increase of handling part and the number of units judged, reduce the handling part of instruction, and possess the increase of the number of units from machine, reduce the handling part of command reception wait and the increase of number of units, reduce the handling part performed, be set to the process of device execution as main frame of main frame, be set to perform as the process from machine from the device of machine, in the increase of number of units, reduce in determination processing, when the increase of number of units, when minimizing condition is set up, be set to the device of main frame to the increase being set to export respectively from the device of machine number of units, reduce instruction, in the increase of number of units, reduce in the process of command reception wait, be set to the increase receiving number of units from the device of machine from the device being set to main frame, when reducing instruction, perform the increase of number of units, reduce.

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

The n platform pump installation that can operate starts running when starting conditions is set up respectively and carries out constant speed drive.

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 controlling functions and select wherein any one unit, be set to the device always selection pressure controlling functions of main frame, be set to from the device of machine select the pressure control function selected by described selection unit and non-pressure controlling functions any one, in the increase of number of units, during minimizing command reception etc. are pending, be set to the increase receiving number of units from the device of machine from the device being set to main frame, when reducing instruction, perform the increase of number of units, reduce, operate with any one in the pressure control function selected and non-pressure controlling functions when number of units increases.

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 multiple stage operation mode when automatically operating, individual operation pattern selected by the pump installation carrying out safeguarding, multiple stage operation mode selected by other pump installations.

8. a water system, it arranges n platform pump installation, and described pump installation comprises the variable-ratio control device of the storage part with each setting value of microprocessor, guidance panel and storage; With the pump that this variable-ratio control device drives; With the pressure sensor of discharge side being arranged on this pump, each pump installation separately operates, and the pump discharge side pressure that described pressure sensor is detected becomes authorized pressure, and the feature of described water system is:

Each variable-ratio control device of described n platform pump installation has to be selected to be the setup unit that main frame or carry out from machine sets, in advance 1 in n platform pump installation is set as main frame by described setup unit, other are set as from machine, first the main frame be set starts when starting conditions is set up, reduce when condition is set up at stop condition or number of units and finally stop, when described main frame breaks down, by described setup unit, by other, from 1 machine, a pump installation replacement is set as main frame

Described starting conditions refers to that pressure of supply water is below starting pressure, and this starting pressure is set as initial value in advance in parameter, and described stop condition refers to that pressure of supply water is stop more than pressure, and this stopping pressure being set as initial value in advance in parameter,

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

Current curve when pump installation is operated with inverter frequency fG, the intersection point of straight line extended upward with water yield Qt/2 are that described number of units reduces electric current,

Described inverter frequency fG be pipe arrangement resistance curve F when the running of 1 pump with on the intersection point of the straight line making water yield Qt/2 extend upward, describe pump performance curve K, meet the frequency of this pump performance curve K,

The water yield of described water yield Qt corresponding to the intersection point of pump performance curve A when highest frequency operates and pipe arrangement resistance curve J.

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

Described main frame is according to increasing for water load or reducing the number of units of pump installation, and rotation increases or reduce order during number of units.

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

Described main frame, according to when increasing for water load or reduce the number of units of pump installation, changes order to multiple stage from wheel.

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

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

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

When described main frame breaks down, other pass through the setup unit of its variable-ratio control device from the pump installation of 1 machine, are replaced and are set as main frame.

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

When described main frame breaks down, other 1 pump installations of numbering minimum device from machine compared with main frame are replaced and are set as main frame.