CN105637224B - Water supply installation - Google Patents

Water supply installation Download PDF

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Publication number
CN105637224B
CN105637224B CN201380078513.8A CN201380078513A CN105637224B CN 105637224 B CN105637224 B CN 105637224B CN 201380078513 A CN201380078513 A CN 201380078513A CN 105637224 B CN105637224 B CN 105637224B
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CN
China
Prior art keywords
motor
frequency converter
temperature
pump
case
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201380078513.8A
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Chinese (zh)
Other versions
CN105637224A (en
Inventor
富田敏夫
田岛清巳
佐野正浩
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Industrial Equipment Systems Co Ltd
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Hitachi Industrial Equipment Systems Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Publication of CN105637224A publication Critical patent/CN105637224A/en
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Publication of CN105637224B publication Critical patent/CN105637224B/en
Expired - Fee Related legal-status Critical Current
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/02—Stopping, starting, unloading or idling control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/10—Other safety measures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0066—Control, e.g. regulation, of pumps, pumping installations or systems by changing the speed, e.g. of the driving engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5806—Cooling the drive system

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

In the existing water supply installation used by the multiple pumps driven by the motor of Frequency Converter Control speed, in the case of the water supply requirement for the big flow that useful 1 pump can not be supplied, if the load current value of the pump in operating is more than load current value, the overload of motor then is prevented by putting into additional pump, so as to prevent motor from reaching a high temperature.But, in the case where the environment temperature of motor is high, rated temperature can be also reached even if not enough load current value.Conversely, it is contemplated that outdoor setting etc., and by load current value be defined as it is relatively low in the case of, mostly set environment in can not play the sufficient ability of pump.Therefore; the present invention is in the motor of the condition of high temperature to protect; for the purpose of making stable water supply lasting, in the case where the motor or frequency converter operated has exceeded set point of temperature, the instruction of operating is sent to frequency converter of the control without the motor operated.Thereby, it is possible to cool down the motor in the condition of high temperature, the water supply stablized.

Description

Water supply installation
Technical field
The present invention relates to using multiple pumps by by multiple frequency converters controlling the motor of speed to drive respectively Water supply installation in, be adapted to the water supply control for the situation that motor or frequency converter reach a high temperature.
Background technology
On being filled using the water supply by the multiple pumps for controlling the motor of speed to drive respectively by multiple frequency converters Put, be disclosed in Japanese Unexamined Patent Publication 2012-112362 publications (patent document 1).
In patent document 1, in the case where needing to supply the water for the big flow that can not be supplied with 1 pump, if fortune The load current value of First pump in turning then puts into second pump, with no more than load current value more than load current value Mode be controlled, so as to prevent the overload of motor, prevent motor from reaching a high temperature.
Prior art literature
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2012-112362 publications
The content of the invention
The invention technical problem to be solved
But, in patent document 1, in the case that the environment temperature of motor is high, even if not up to load current value, electronic Machine may also reach rated temperature.Although environment temperature etc. is recorded as specification in operation instructions etc., because of open air Temperature rising etc. caused by direct sunlight during setting, surrounding motors temperature may also unexpectedly reach a high temperature.Conversely, it is considered to room In the case of load current value (temperature rising) is provided during outer setting, it is impossible to big a variety of causes such as influence of direct sunlight Set plays sufficient ability more under environment.
Also, in order that motor is no more than rated temperature, the maximum speed of pump is set in no more than load current value In scope.Herein, operated with exceeding load current value sometimes in the case where having flowed big flow etc..However, this Sample, which temporarily exceedes load current value, can't make motor exceed rated temperature, but be taken due to limiting the performance of pump Increase the countermeasures such as pump operating number, there is the problem of overall efficiency of water supply installation is reduced.
The present invention in view of above-mentioned technical problem and complete, its object is to protect be in the condition of high temperature motor, enter And continual and steady water supply.
Technical teaching for solving the problem was
In order to solve the above-mentioned technical problem, for example with the structure described in technical scheme.The present invention includes a variety of solve The technical scheme of above mentioned problem, lifts one example, in the case where the motor or frequency converter operated has exceeded set point of temperature, The instruction of operating is sent to frequency converter of the control without the motor operated.
The effect of invention
In accordance with the invention it is possible to cool down the motor in the condition of high temperature, failure, and the confession stablized are prevented Water.
Brief description of the drawings
Fig. 1 is the outside drawing that forms as one of motor and frequency converter of pump driving.
Fig. 2 is Fig. 1 electric rotating machine part and the expanded view of frequency converter.
Fig. 3 is the integrally-built figure for the water supply installation for representing the present embodiment 1 to 3.
Fig. 4 is the figure of the data content of the storage part for the frequency converter for representing the present embodiment 1 to 3.
Fig. 5 is the figure of the data content of the storage part for the control device for representing the present embodiment 1 to 3.
Fig. 6 is the figure for the content transmitted from frequency converter to the communication data of control device for representing the present embodiment 1 to 3.
Fig. 7 is the figure for the content transmitted from control device to the communication data of frequency converter for representing the present embodiment 1 to 3.
Fig. 8 A are the figures of the first half for the main control flow for representing the present embodiment 1 to 3.
Fig. 8 B are the figures of the latter half for the main control flow for representing the present embodiment 1 to 3.
Fig. 9 is that the single pump operation start of the present embodiment 1 and 3 confirms the detailed control flow of processing.
Figure 10 is the detailed control flow of the Stress control processing of the present embodiment 1 to 3.
Figure 11 A are the first halfs that the parallel operation start of the present embodiment 1 and 3 confirms the detailed control flow of processing.
Figure 11 B are the latter halfs that the parallel operation start of the present embodiment 1 and 3 confirms the detailed control flow of processing.
Figure 12 is that the single pump operating of the present embodiment 1 and 2 stops confirming the detailed control flow of processing.
Figure 13 is that the parallel operating of the present embodiment 1 and 2 stops confirming the detailed control flow of processing.
Figure 14 is that the single pump operation start of the present embodiment 2 confirms the detailed control flow of processing.
Figure 15 A are the first halfs that the parallel operation start of the present embodiment 2 confirms the detailed control flow of processing.
Figure 15 B are the latter halfs that the parallel operation start of the present embodiment 2 confirms the detailed control flow of processing.
Figure 16 is that the single pump operating of the present embodiment 3 stops confirming the detailed control flow of processing.
Figure 17 A are that the parallel operating of the present embodiment 3 stops confirming the first half of the detailed control flow of processing.
Figure 17 B are that the parallel operating of the present embodiment 3 stops confirming the latter half of the detailed control flow of processing.
Figure 18 is that the frequency converter of the present embodiment 1 to 3 stops judging the detailed control flow of processing.
Figure 19 is the explanation figure of the output, pressure of supply water and pump operating range of the present embodiment 4.
Embodiment
Hereinafter, with brief description of the drawings embodiments of the invention.
【Embodiment 1】
In embodiment 1, in the water supply installation using the pump driven by the motor by Frequency Converter Control speed, The frequency converter is arranged in a part for the housing of the periphery for the armature for constituting above-mentioned motor, also using being arranged on the frequency converter Interior temperature detector detects the temperature of the housing.Also, case temperature is detected using the temperature detector, is carried out In the case that the motor or frequency converter of operating have exceeded set point of temperature, to frequency converter of the control without the motor operated Send the instruction of operating.And then, in the case where the motor of stopping has exceeded set point of temperature, the frequency conversion to controlling the motor Device sends the instruction of operating.
That is, in the case where motor or frequency converter have exceeded set point of temperature, even in the reduction that pressure of supply water does not occur, Or not be load current value more than load current value in the case of, control device also adds pump and operated, so as to realize Load is scattered.
Premise firstly, for the present embodiment is that the relation of motor and frequency converter is illustrated with accompanying drawing.Fig. 1 is that pump drives The outside drawing that the motor and frequency converter employed are integrally formed.In Fig. 1,1 is the cover for the periphery for covering synchronous motor body, 2 The cooling dome 2,3 for being the built-in cooling fan 25 illustrated below be cover 1 it is outer peripheral face installation, store and hereinafter say The casing of bright frequency converter, the terminal box of 4 noise filters that have been built-in, 5 be end frame, and 6 be the rotor shape with motor The rotary shaft being integrally formed.
In addition, showing the exhibition of each several part in the electric rotating machine part of the inside storage of above-mentioned cover 1 and frequency converter in Fig. 2 Open figure.In Fig. 2,9 be the housing of electric rotating machine, and cooling fins 22 are formd in a part for its outer surface.In addition, although It is invisible in figure, but in the inside of housing 9, insert the stator and rotor of electric rotating machine, 24 be with above-mentioned end frame 5 Opposite side, the end frame installed in the end of housing 9,25 be to be arranged on above-mentioned rotary shaft in the outside of end frame 24 Cooling fan on 6.In addition, in the plane 23 of housing 9, being mounted with via the opening portion 21 set in a part for cover 1 Frequency converter 7, afterwards, the cover 3 for protecting it is mounted with from outside.
In addition, frequency converter has as power switch component of heater element etc., therefore for their heating shape of monitoring Condition and implement protection purpose, there is provided temperature detector.26 be control and I/F substrate casings, and 27 be that smoothing capacity device is used Casing.Moreover, in another end (left end in figure) of housing 9, being provided with above-mentioned cooling dome 2.In addition, the symbol 8 in figure The substantially central portion shown in the wall of the cooling dome 2 is in the aperture for being used to import the air of outside formed latticedly.
That is, frequency converter 7 is directly installed in the plane 23 of a part for the housing 9 of electric rotating machine, frequency converter 7 with by heat conduction Property the housing integratedly heat conduction that constitutes of outstanding material, the temperature detector being located inside frequency converter can be used to frequency converter and shell The temperature of body carries out integral management.
Then, the overall structure for the water supply installation of the present embodiment is illustrated.
In Fig. 3,10-1,10-2,10-3 represent pump, are driven by the motor shown in 20-1,20-2,20-3.Here for It is convenient, from being numbered less pump and motor, referred to as No. 1 pump, No. 2 pumps, No. 3 pumps, and No. 1 motor, No. 2 motor, 3 Number motor.The suction side of these pumps is connected via the suction line shown in 11 with water source side.Water source side receives under direct-connected mode The supply of water from total feed pipe (not shown), receives the supply of water under supply flume mode from supply flume (not shown).12- 1st, 12-2,12-3,14-1,14-2,14-3 represent gate valve respectively, and 13-1,13-2,13-3 represent check-valves respectively, and 15 represent to supply Water pipe, 17 are disposed on the pressure sensing cell that electric signal is correspondingly sent with pressure herein of feed pipe 15.Based on the pressure The detected value of power detection unit is controlled (such as discharge pressure constant control, reckoning terminal pressure perseverance to the discharge pressure of pump Fixed control).And then, in the case of being direct sending formula as the target of the end of the feed pipe 15 of Demand-side, with Demand-side feed pipe Connection, supplies water such as to the tap condominium.In the case of high-order water supply slot type, be connected with the Demand-side feed pipe and High-order supply flume is supplied water.18 are disposed on the pressurized tank for being used to suppress pressure oscillation drastically of feed pipe 15.
No. 1 frequency converter, No. 2 frequency converters, No. 3 frequency converters shown in 30-1,30-2,30-3 receive the confession of power supply from mains side Give, change the frequency of output current as the power-converting device shown in 32-1,32-2,32-3 respectively, so as to change motor 20- 1st, it is driven 20-2,20-3 rotating speed.31-1,31-2,31-3 are arithmetic processing sections, according in 33-1,33-2,33-3 institute The control parameter stored in the storage part shown, according to the signal inputted from the signal input part shown in 34-1,34-2,34-3, holds Row motor 20-1,20-2,20-3 operating/stopping and rotation speed change.
40 be control device, and the operating number of pump is managed by frequency converter 30-1,30-2,30-3.41 be arithmetic processing section, According to the control parameter stored in the storage part shown in 43, pump is managed according to the signal inputted from the signal input part shown in 44 Operating number.Control device 40 and frequency converter 30-1,30-2,30-3 respectively via the communication shown in 50-1,50-2,50-3/ Control line is connected, the signal needed for exchange control device 40 and frequency converter 30-1,30-2,30-3 control.
Then, the volatile storage for being stored in frequency converter 30-1,30-2,30-3 storage part 33-1,33-2,33-3 The content of device and the content of non-volatility memorizer are illustrated.
The content that non-volatility memorizer is shown in the content of volatile storage, Fig. 4 (b) is shown in Fig. 4 (a). In addition it is also possible to not have storage part inside frequency converter, and it is changed to outside frequency converter that storage device is installed.
In Fig. 4 (a), the current discharge lateral pressure DPN of water supply installation is stored in the address 1000 of volatile storage.
The current rotating speed HzN of the motor controlled is stored in address 1001.
The current load current value AMN of the motor controlled is stored in address 1002.
Current state of temperature SRN is stored in address 1008.In the case of motor temperature and frequency converter are normothermic It is that 1 is stored in SRN in the case of high temperature that any side in 0, motor temperature and frequency converter temperature is stored in SRN.
In addition, in Fig. 4 (b), the identification number NO of pump is prestored in the address 3000 of non-volatility memorizer.Control Device and frequency converter are reconnected more with more than 1 ︰ communicated in the case of, for distinguishing frequency converter by control device.Control dress Putting need not in the case of being connected with frequency converter difference 1 ︰ 1 ground.
The target discharge lateral pressure HS of water supply installation is prestored in address 3001.
The maximum speed NMAX of motor is prestored in address 3002, motor is prestored in address 3003 Minimum speed NMIN.
Goal pressure Poff when water supply installation shuts down is prestored in address 3012.
The goal pressure P0 under closed valve state is stored in advance in address 3013, is prestored in address 3014 and uses 1 Goal pressure P1 under the maximum amount of water that platform pump can be supplied.Carry out calculating the feelings of terminal pressure constant control operating with 1 pump Under condition, the change with water correspondingly makes pressure of supply water change in the scope from the P0 to P1.
The goal pressure P2 under the maximum amount of water that can be supplied with 2 pumps is prestored in address 3015.Entered with 1 pump In the case that row calculates the operating of terminal pressure constant control, the change with water correspondingly make pressure of supply water from P1 before this to Change in P2 scope.
The goal pressure P3 under the maximum amount of water that can be supplied with 3 pumps is prestored in address 3016.Entered with 3 pumps In the case that row calculates the operating of terminal pressure constant control, the change with water correspondingly make pressure of supply water from P2 before this to Change in P3 scope.
In addition, carrying out making P0, P1, P2, P3 turn into and HS identical values in the case of discharge pressure constant control.
The minimum running speed N1D in the case of being operated with 1 pump is prestored in address 3030.Closed with 1 pump Goal pressure is set to P0 in the case of being operated under valve state, running speed is set to N1D.
It is stored in advance in address 3031 when being operated with 1 pump and starts 2 parallel operatings, making the operating number of pump turns into Running speed N1A at 2.Goal pressure is set to P1 under the maximum amount of water that can be supplied with 1 pump, running speed is set to N1A。
It is stored in advance in address 3032 when being operated with 2 pumps and stops 2 parallel operatings, making the operating number of pump turns into Running speed N2D at 1.Goal pressure is set to P1, the running speed of 1 pump under the least quantity supplied with 2 pumps N2D is set to, the running speed of another 1 pump is set to N1A.
It is stored in advance in address 3033 when being operated with 2 pumps and starts 3 parallel operatings, making the operating number of pump turns into Running speed N2A at 3.Goal pressure is set to P2 under the maximum amount of water that can be supplied with 2 pumps, running speed is set to N2A。
It is stored in advance in address 3034 when being operated with 3 pumps and stops 3 parallel operatings, making the operating number of pump turns into Running speed N3D at 2.Goal pressure is set to P2, the running speed of 1 pump under the least quantity supplied with 3 pumps N3D is set to, the running speed of 2 pumps is set to N2A in addition.
The highest running speed N3A in the case of being operated with 3 pumps is prestored in address 3035.With 3 pump energy Goal pressure is set to P3 under the maximum amount of water enough supplied, running speed is set to N3A.
Then, for the content of volatile storage that is stored in the storage part 43 of control device 40 and non-volatile deposit The content of reservoir is illustrated.
The content that non-volatility memorizer is shown in the content of volatile storage, Fig. 5 (b) is shown in Fig. 5 (a). In addition it is also possible to not have storage part inside control device, and it is changed to outside control device that storage device is installed.
In Fig. 5 (a), water supply installation is stored in the same manner as the storage part of frequency converter in the address 1000 of volatile storage Current discharge lateral pressure DPN.
The pump numbering RNO being currently running is stored in address 1004.Because the pump respectively numbered with 1 variable storage is It is no to operate, so each bit for example to each numbering machine assignment RNO variable, first bit is high level (High) Then represent that No. 1 pump is operated, second bit is that high level (High) then represents that No. 2 pumps are operated, and is so stored. Thus it can interpolate that No. 1 pump is being operated if RNO is 1, RNO is 3 and can interpolate that No. 1 pump and No. 2 pumps are operated, SRP is 5 and can interpolate that No. 1 pump and No. 3 pumps are operated.
The pump numbering VNO just in changed speed operation is stored in address 1005.Being stored in address 1006 next will be carried out The pump numbering PNO of changed speed operation.
Motor/frequency converter SRP of the condition of high temperature is stored in address 1007.Because respectively being numbered with 1 variable storage Whether motor or frequency converter are the condition of high temperature, so for example distributing each unit each bit of SRP variable, first bit Then represent that No. 1 motor or No. 1 frequency converter are the condition of high temperature for high level (High), second bit be high level (High) then Represent that No. 2 motor or No. 2 frequency converters are the condition of high temperature, so store.Thus it can interpolate that No. 1 electricity if SRP is 1 Motivation or No. 1 frequency converter are the condition of high temperature, and SRP is 3 and can interpolate that No. 1 motor or No. 1 frequency converter and No. 2 motor or 2 Number frequency converter is the condition of high temperature, and SRP is 5 and can interpolate that No. 1 motor or No. 1 frequency converter and No. 3 motor or No. 3 frequency converters For the condition of high temperature.
The number of units RPN for the pump being currently running in water supplying unit is stored in address 1010.
The current of (changed speed operation) pump that speed control is being carried out in the pump operated is stored in address 1101 Rotating speed HzV.
The current of (changed speed operation) pump that speed control is being carried out in the pump operated is stored in address 1102 Load current value AMV.
During the residue of the timer for the acknowledging time that the beginning condition that storage setting is operated parallel in address 1201 is set up Between TN1, in address 1202 during the residue of the timer for the acknowledging time that the stop condition that operates parallel of storage setting is set up Between TN2, in address 1203 storage setting single pump stop condition set up acknowledging time timer remaining time TN3。
In addition, in Fig. 5 (b), the pump number of units of water supply installation is prestored in the address 2001 of non-volatility memorizer PNUM。
The maximum number of units PMAX of the parallel operating of water supply installation is prestored in address 2002.
The acknowledging time TM1 that the beginning condition operated parallel is set up is prestored in address 2101.
The acknowledging time TM2 that the stop condition operated parallel is set up is prestored in address 2102.
The identification number NO of pump is prestored in address 3000.The identification number of control device is set to 0.With frequency converter Reconnected with more than 1 ︰ in the case of being communicated, for distinguishing frequency converter by control device more.Control device and frequency converter point Need not in the case of the other ground of 1 ︰ 1 connection.
The discharge pressure Pon that water supply installation starts running is prestored in address 3011.
The goal pressure P0 under closed valve state is prestored in address 3013.
Be stored in advance in address 3021 when being operated with 1 pump start 2 it is operating parallel, second parallel start pressure Power P1A.When 1 pump is operated above with running speed N1A, discharge side insufficient pressure P1A state have passed through timer 1 (TM1) in the case of more than setting time, make second to pump up dynamic, 2 pumps is operated simultaneously.
It is stored in advance in address 3022 when being operated with 2 pumps and stops 2 operate parallel, second parallel stopping pressures Power P2D.1 in pump when being operated with below running speed N2D, discharge lateral pressure have passed through meter in more than P2D state When device 2 (TM2) setting time more than in the case of, stop the operating of pump (First pump) started at first, only with 1 pump fortune Turn.
Be stored in advance in address 3023 when being operated with 2 pumps start 3 it is operating parallel, the 3rd parallel start pressure Power P2A.When 2 pumps are operated above with running speed N2A, discharge side insufficient pressure P2A state have passed through timer 1 (TM1) in the case of more than setting time, make the 3rd to pump up dynamic, 3 pumps is operated simultaneously.
It is stored in advance in address 3024 when being operated with 3 pumps and stops 3 operate parallel, the 3rd parallel stopping pressures Power P3D.1 in pump when being operated with below running speed N3D, discharge lateral pressure have passed through meter in more than P3D state When device 2 (TM2) setting time more than in the case of, stop the operating of pump (First pump) started at first, carried out with 2 pumps Operating.
The content same with the storage part of frequency converter is prestored in address 3030 to address 3034.Omit and say herein It is bright.
Be stored in advance in address 3041 when being operated with 1 pump start 2 it is operating parallel, second start to bear parallel Set current value A1A.The load current value of 1 pump have passed through more than timer 1 (TM1) setting time in more than A1A state In the case of, make second to pump up dynamic, 2 pumps is operated simultaneously.
Be stored in advance in address 3042 when being operated with 3 pumps stop 3 it is operating parallel, the 3rd it is parallel stop it is negative Set current value A2D.When the load current value of 1 in pump is operated less than A2D, have passed through (TM2) setting time of timer 2 with In the case of upper, stop the operating of the pump (First pump) started at first, only operated with 1 pump.
Be stored in advance in address 3043 when being operated with 2 pumps start 3 it is operating parallel, the 3rd start to bear parallel Set current value A2A.The load current value of 1 in pump more than A2A state have passed through (TM1) setting time of timer 1 with In the case of upper, make the 3rd to pump up dynamic, 3 pumps is operated simultaneously.
Be stored in advance in address 3044 when being operated with 3 pumps stop 3 it is operating parallel, the 3rd it is parallel stop it is negative Set current value A3D.When the load current value of 1 in pump is operated less than A3D, have passed through (TM2) setting time of timer 2 with In the case of upper, stop the operating of the pump (First pump) started at first, operated with 2 pumps.
Then, illustrated for communication data.
The communication sent from frequency converter to control device via communication/control line 50-1,50-2,50-3 is shown in Fig. 6 The example of data.In addition it is also possible to not communicate, but prepare the analog signal line or numeral letter of quantity identical with data bulk Number line, high level (High)/low level (Low) of the voltage or electric current or digital signal line that pass through analog signal line is carried out The exchange of data.
In Fig. 6, the Bit String STA first since frequency converter sends communication.Then identification number (this of transmission source is sent The pump identification number of machine) NO, identification number " 0 " of control device (represent) TO for sending target, current running speed HzN, Current load current value AMN, current state of temperature SRN, sends the spy that these data are correctly have sent using confirmation The value of the checksum CRC for the data that fixed calculating formula is calculated, finally sends the Bit String STP of sign off.Control device leads to Cross the verification that carries out being calculated using specific calculating formula according to the data that receive and value and the checksum value that receives Compare, be capable of deciding whether to be received correctly data.Control device will be made from volatile storage address 1005 respectively The running speed HzN that the frequency converter of the numbering stored for changed speed operation pump is sent is fast as the current operating of changed speed operation pump Degree HzV is stored in volatile storage address 1101, and the current load of load current value AMN as changed speed operation pump is electric Flow valuve AMV is stored in volatile storage address 1102.
The communication sent from control device to frequency converter via communication/control line 50-1,50-2,50-3 is shown in Fig. 7 The example of data.
Bit String STA first since control device sends communication.Then the identification number for sending transmission source (represents control " 0 " of device processed) NO, identification number (pump identification number) TO of target, operating/halt instruction DRC are sent, send using confirming The value of the checksum CRC for the data that the specific calculating formulas of these data is calculated correctly is have sent, communication is finally sent The Bit String STP of end.Frequency converter by the verification that calculated according to the data that receive using specific calculating formula and Value and the comparison of checksum value that receives, be capable of deciding whether to be received correctly data.
In the case that operating/stopping indicates that DRC is 0, frequency converter stops motor.Receive operating/halt instruction DRC In the case of the instruction of changed speed operation (speed control) as 1,3, frequency converter changes the rotating speed of motor so that current Discharge lateral pressure DPN consistent with target discharge lateral pressure HS.Receive operating/stopping and indicate that DRC is constant speed as 2,4 In the case of the instruction of operating, frequency converter makes motor be operated with highest running speed N2A, N3A corresponding with operating number.
Then, illustrated for the control flow of the present embodiment with Fig. 8.
Fig. 8 is the main control flow of the present embodiment.Fig. 8 is divided into Fig. 8 A and Fig. 8 B for the convenience of paper, but passes through Symbol A, B are continuous.Fig. 8 A and Fig. 8 B are merged into Fig. 8 and illustrated by the following description.In Fig. 8, in step 100, as first Beginningization processing, carries out the read/write of each control parameter.Each frequency converter is communicated from control device in a step 101.Become Frequency device receives the Content of Communication, changes the state of operating/stopping.Each frequency converter communicates to control device in a step 102. Control device receives the Content of Communication, the current running speed of each frequency converter of understanding, load current value, state of temperature, storage Under the corresponding numbering of volatile storage.In the case that the operating number of pump is 0 in step 103, step 120 is carried out Single pump operation start confirmation is handled.In step 121 confirm separate unit operation start condition whether set up, in the case of establishment Current pump operating number is set to 1 by control device in step 122, is stored in volatile storage address 1010, and return Return step 101.In the case that separate unit operation start condition is invalid in step 121, without any processing, return to step 101。
Under the operating number of pump is not the situation (situation of the existing pump operated) of 0 in step 103, in step Stress control processing is carried out in rapid 130, parallel operation start processing is carried out in step 140.Parallel fortune is confirmed in step 141 Turn whether beginning condition is set up, add 1 to current pump operating number in step 142 in the case of establishment, be stored in volatility In storage address 1010, and return to step 101.
In the case that operation start condition is invalid in step 141, the operating number of pump, fortune are confirmed in step 143 In the case that turntable number is 1, the single pump operating for carrying out step 150 stops confirmation processing.Separate unit fortune is confirmed in step 151 Turn whether stop condition is set up, current pump operating number is set to 0 by control device in step 152 in the case of establishment, It is stored in volatile storage address 1010, and return to step 101.Separate unit stopping beginning condition is invalid in step 151 In the case of, without any processing, return to step 101.
In the case that the operating number of pump is not 1 in step 143, parallel operating is carried out in a step 160 and is stopped really Recognize processing.Confirm whether shutdown condition is set up in the step 161, in step 162 to current pump in the case of establishment Operating number subtracts 1, is stored in volatile storage address 1010, and return to step 101.Operation start bar in the step 161 In the case that part is invalid, without any processing, return to step 101.
Then, the single pump operation start for Fig. 8 step 120 confirms the details of processing, is illustrated with Fig. 9.
In Fig. 9, control device is to the electronic of the condition of high temperature that is stored in volatile storage address 1007 in step 200 Machine/frequency converter SRP is confirmed.It is the state of motor or frequency converter that the condition of high temperature is not present if SRP is 0.SRP It is to advance to step 210 in the case of 0, in step 210 to the water supply installation that is stored in volatile storage address 1000 Current discharge lateral pressure DPN is confirmed, to the water supply installation prestored in DPN and non-volatility memorizer address 3011 The discharge lateral pressure Pon started running is compared.
It is invalid that DPN is considered as separate unit operation start condition in the case of more than Pon, in step 221, advances to Fig. 8 Step 121.It is next by what is stored in volatile storage address 1006 in the step 212 in the case that DPN is less than Pon The pump numbering PNO to be operated is stored in volatile storage address 1005 as the pump VNO of changed speed operation to be carried out, afterwards, Advance to step 222.
In the case that SRP is not 0 (motor or frequency converter that there is the condition of high temperature) in step 200, in step 201 Confirm whether the cooling fan independently worked relative to the operating of motor and frequency converter set in water supply installation is stopping In only, cooling fan in stopping in the case of beginning to cool down the operating of fan in step 202., advance to step 203.In step In rapid 201 cooling fan in operation in the case of, advance to step 203.Judged to turn into according to SRP value in step 203 The pump numbering of the condition of high temperature, the pump numbering for becoming the condition of high temperature is stored in as the pump VNO of changed speed operation to be carried out waves In hair property storage address 1005, afterwards, step 222 is advanced to.
It is considered as the establishment of separate unit operation start condition in step 222, what is stored in step 223 in beginning VNO will be carried out The operating of the pump of changed speed operation, in step 224 compiles next pump to be operated of volatile storage address 1006 Number it is updated to carry out the pump of next numbering of the pump of changed speed operation, advances to Fig. 8 step 121.
Then, the details handled for the Stress control of Fig. 8 step 130, are illustrated with Figure 10.
In Figure 10, in step 300 to DPN with stored in volatile storage address 1009 it is current with water supply installation The corresponding goal pressure HsN of water be compared.In the case that DPN is higher than HsN, in step 301 at the computing of frequency converter Reason portion indicates power conversion unit to slow down, the instruction frequency that power-converting device reduction is sent to motor in step 302, makes Running speed is slowed down, and advances to Fig. 8 step 140.DPN is in the case of below HsN, the computing of frequency converter in step 303 Processing unit indicates power conversion unit to accelerate, the instruction frequency that power-converting device increase is sent to motor in step 304, Accelerate running speed, advance to Fig. 8 step 140.
Then, the parallel operation start for Fig. 8 step 140 confirms the details of processing, is illustrated with Figure 11.
Figure 11 is divided into Figure 11 A and Figure 11 B for the convenience of paper, but continuous by symbol A, B, C.The following description Figure 11 A and Figure 11 B are merged into Figure 11 to illustrate.In Figure 11, control device is according to volatile storage in step 400 The pump numbering RNO for carrying out speed change/constant speed operating stored in location 1004 confirms the pump numbering in stopping, and then according to SRP Confirm the motor or frequency converter of the condition of high temperature.In the absence of the motor or the situation of frequency converter of the condition of high temperature in pump in stopping Under, in step 410 to the current load current value AMV of changed speed operation pump that is stored in volatile storage address 1102 with The load current value that the beginning prestored in non-volatility memorizer is operated parallel is compared.Operating number is 1 In the case of with the beginning 2 of address 3041 parallel operating when load current value A1A, operating number be in the case of 2 with ground Load current value A2A during 3 parallel operatings of beginning of location 3043 is compared.AMV deficiencies start load current value parallel In the case of, DPN is compared with the parallel operation start pressure that is prestored in non-volatility memorizer in step 411 Compared with.Discharge lateral pressure P1A, operating number when operating number is operated parallel for the beginning 2 in the case of 1 with address 3021 Discharge lateral pressure P2A when being operated parallel for the beginning 3 in the case of 2 with address 3023 is compared.DPN is being opened parallel Advance to step 413 in the case of more than beginning pressure, by it is described later it is parallel start timer (timer 1) and be set to halted state, Advance to step 421.It is considered as parallel operation start condition in step 421 invalid, advances to Fig. 8 step 141.
AMV DPN deficiencies in the situation or step 411 for start parallel more than load current value are opened parallel in step 410 In the case of beginning pressure, HzV and the parallel commencing speed prestored in non-volatility memorizer are carried out in step 412 Compare.Running speed N1A, operating number when operating number is operated parallel for the beginning 2 in the case of 1 with address 3031 Running speed N2A when being operated parallel for the beginning 3 in the case of 2 with address 3033 is compared.HzV deficiencies are opened parallel Advance to step 413 in the case of beginning running speed, by it is described later it is parallel start timer (timer 1) and be set to halted state, Advance to step 421.It is considered as parallel operation start condition in step 421 invalid, advances to Fig. 8 step 141.
In the case that HzV is more than the parallel speed that starts running, confirm to start timer (timing parallel in step 414 Device 1) state, if it is parallel start timer in stopping if parallel will start timer and be set in counting, will be non-volatile Stored in storage address 2101 until the time TM1 that starts parallel as the remaining time TN1 of timer 1 is stored in volatilization In property storage address 1201.The remaining time TN1 for starting timer 1 in step 415 counts down, and advances to step 421. It is considered as parallel operation start condition in step 421 invalid, advances to Fig. 8 step 141.
In the case of starting parallel in step 414 during timer is not off, confirm that timer 1 is in step 416 It is no in counting, in counting in the case of advance to step 421.Be considered as in step 421 parallel operation start condition not into It is vertical, advance to Fig. 8 step 141.Count and terminate and in the case of the done state, advance to step 422.
In step 400, in the case of the motor or frequency converter that there is the condition of high temperature in the pump in stopping, in step Confirm whether is the cooling fan independently worked relative to the operating of motor and frequency converter that is set in water supply installation in 401 In stopping, cooling fan in stopping in the case of beginning to cool down the operating of fan in step 402, advance to step 403. In step 401 cooling fan in operation in the case of, advance to step 403.In step 403 according to RNO and SRP value Judge the pump for becoming the condition of high temperature numbering in stopping, the pump in the stopping for becoming the condition of high temperature is numbered as next The pump PNO to be operated is stored in volatile storage address 1006, afterwards, advances to step 422.
It is considered as parallel operation start condition in step 422 to set up, what is stored in beginning PNO in step 423 is next The constant speed (constant speed) for the pump to be operated is operated, in step 424 the selective volatilization memory from the pump numbering in stopping Next pump numbering to be operated of address 1006, is updated to the numbering, advances to Fig. 8 step 141.
Then, the single pump operating for Fig. 8 step 150 stops confirming the details of processing, is illustrated with Figure 12.
In Figure 12, SRP is confirmed in step 500.SRP (motor or frequency converter for there is the condition of high temperature) more than 1 In the case of, advance to step 511.SRP is the situation of 0 (motor or frequency converter that the condition of high temperature is not present) in step 500 Under, confirm that the operating relative to motor and frequency converter set in water supply installation independently works in step 501 cold But fan whether in operation, cooling fan in operation in the case of in step 502 stop the operating of cooling fan, it is preceding Proceed to step 511.That is, multiple motor or frequency converter are not to stop the operating of cooling fan in the case of the condition of high temperature, Realize energy-conservation.
To the mesh under DPN and the closed valve state prestored in non-volatility memorizer address 3013 in step 511 Mark pressure P0 is compared.DPN less than P0 in the case of advance to step 513, by separate unit described later stop timer (timer 3) halted state is set to, step 521 is advanced to.DPN advances to step 512 in the case of more than P0, to HzV with it is non-volatile Property storage address 3030 in store with 1 operate in the case of minimum running speed N1D be compared.HzV N1D with Step 513 is advanced in the case of upper, separate unit described later is stopped into timer (timer 3) is set to halted state, advances to step Rapid 521.It is considered as separate unit shutdown condition in step 521 invalid, advances to Fig. 8 step 151.
In the case that HzV is less than N1D, confirm that separate unit stops the state of timer (timer 3) in the step 514, if Separate unit stops timer and then separate unit stopping timer being set in counting in stopping, by non-volatility memorizer address 2103 Storage as the remaining time TN3 of timer 3 is stored in volatile storage address 1203 until the time TM3 that separate unit stops In.The remaining time TN3 for starting timer 3 in step 515 counts down, and advances to step 521.It is considered as in step 521 Parallel operation start condition is invalid, advances to Fig. 8 step 151.
In the case that separate unit stops during timer is not off in the step 514, confirm that timer 3 is in step 516 It is no in counting, in counting in the case of advance to step 521.Be considered as in step 521 separate unit shutdown condition not into It is vertical, advance to Fig. 8 step 151.Count and terminate and in the case of the done state, advance to step 522.
It is considered as the establishment of separate unit shutdown condition in step 522, the progress stored in VNO is made in step 523 The operating of the pump of changed speed operation stops, and advances to Fig. 8 step 151.
Then, the parallel operating for Fig. 8 step 160 stops confirming the details of processing, is illustrated with Figure 13.
In Figure 13, SRP is confirmed in step 600.In the case that SRP is more than 1, step 610 is advanced to.In step 600 In the case that middle SRP is 0, the operating relative to motor and frequency converter set in water supply installation is confirmed in step 601 The cooling fan independently worked whether in operation, cooling fan in operation in the case of make cooling wind in step 602 The operating of fan stops, and advances to step 610.
The load current operated parallel to AMV and the stopping prestored in non-volatility memorizer in step 610 Value is compared.Operating number be in the case of 2 with the stopping 2 of address 3042 parallel operating when load current value A2D, Load current value A3D when operating number is operated parallel for the stopping 3 in the case of 3 with address 3044 is compared.AMV In the case where stopping more than load current value parallel, in step 611 to DPN with being prestored in non-volatility memorizer Parallel operating stop pressure being compared.When operating number is operated parallel for the stopping 2 in the case of 2 with address 3022 Discharge lateral pressure P2D, operating number be in the case of 3 with the stopping 3 of address 3024 parallel operating when discharge side pressure Power P3D is compared.Step 613 is advanced in the case of the parallel initiation pressure of DPN deficiencies, by parallel stopping timer described later (timer 2) is set to halted state, advances to step 621.It is considered as parallel shutdown condition in step 621 invalid, it is preceding Proceed to Fig. 8 step 161.
DPN stops pressure parallel in the not enough parallel situations or step 611 for stopping load current value of AMV in step 610 In the case of more than power, HzV and the parallel stopping speed being prestored in non-volatility memorizer are carried out in step 612 Compare.Running speed N2D, operating number when operating number is operated parallel for the stopping 2 in the case of 2 with address 3032 Running speed N3D when being operated parallel for the stopping 3 in the case of 3 with address 3034 is compared.HzV is starting parallel Stop advancing to step 613 in the case of more than speed, the parallel timer (timer 1) that starts described later is set to stop shape State, advances to step 621.It is considered as parallel shutdown condition in step 621 invalid, advances to Fig. 8 step 161.
HzV is not enough to be started in the case of stopping speed parallel, confirms to stop timer (timer parallel in step 614 2) the parallel timer that stops, being set in counting, is deposited non-volatile by state if timer is stopped parallel in stopping Stored in memory address 2102 until the time TM2 that stops parallel as the remaining time TN2 of timer 2 is stored in volatility In storage address 1202.The remaining time TN2 for starting timer 2 in step 615 counts down, and advances to step 621. It is considered as parallel shutdown condition in step 621 invalid, advances to Fig. 8 step 161.
In the case of during parallel stopping timer not being off in step 614, confirm that timer 2 is in step 616 It is no in counting, in counting in the case of advance to step 621.Be considered as in step 621 parallel shutdown condition not into It is vertical, advance to Fig. 8 step 161.Count and terminate and in the case of the done state, advance to step 622.
It is considered as parallel shutdown condition in step 622 to set up, the progress stored in VNO is made in step 623 The operating of the pump of changed speed operation stops, and the next pump for numbering the pump of stopping in step 624 (carries out constant speed operating Pump) stored as the pump of changed speed operation to be carried out, to carry out changed speed operation by carry out constant speed operating in step 625 Pump is set to changed speed operation and started running, and advances to Fig. 8 step 161.
As described above, in the present embodiment, frequency converter is arranged in a part for the housing of motor, using in frequency converter The temperature detector of setting, detects the case temperature of multiple motor or the temperature of multiple frequency converters, what is operated In the case that motor or frequency converter have exceeded set point of temperature, fortune is sent to frequency converter of the control without the motor operated The instruction turned.And then, in the case where the motor of stopping has exceeded set point of temperature, the frequency converter for controlling the motor is sent The instruction of operating.Thus, in the case where motor or frequency converter have exceeded set point of temperature, even in pressure of supply water does not occur Reduction or in the case of not being load current value more than load current value, control device also add pump carry out operating so as to It can realize that load is scattered.
【Embodiment 2】
In embodiment 1, when the motor of stopping is in the condition of high temperature, in the stopping that set point of temperature has been exceeded to control The frequency converter of motor sends the instruction of operating, makes motor rotation so as to by the cooling fan worked with motor linkage Realize the cooling of motor.On the other hand, it is characterised by, exceedes in the motor or frequency converter of stopping in the present embodiment 2 In the case of set point of temperature, the instruction of operating is not sent to the motor or frequency converter more than set point of temperature.The reason for this is that In the case where being the motor without cooling fan, the instruction that the motor reached a high temperature during to operating sends operating may The temperature of motor can be made further to raise.In addition, operating and the finger of the operating/stopping sent to motor in cooling fan Show in the frequency converter not linked, the equally possible temperature for making frequency converter of instruction for sending operating is further raised.
Hereinafter, embodiment 2 is illustrated using accompanying drawing.
First, it is similarly to Example 1 Fig. 1 to Fig. 7 on structure, the data content of storage part, communication data content, Therefore omit the description.Wherein, in the present embodiment, it is contemplated that be to be worked in the absence of by rotating motor with motor linkage Cooling fan (Fig. 2 cooling fan 25) situation.
In addition, in the control flow of embodiment 2, Fig. 8, the figure of the details of explanation Stress control processing of main control flow 10th, the operating of explanation single pump stops confirming the figure that the parallel operating of Figure 12 of the details of processing, explanation stops confirming the details of processing 13 is same as Example 1, therefore omits the description.
Single pump operation start firstly, for the step 120 of the main control flow chart 8 in embodiment 2 confirms processing Details, are illustrated with Figure 14.
In Figure 14, to the current row of the water supply installation stored in volatile storage address 1000 in step 210-2 Go out lateral pressure DPN to be confirmed, fortune is started to DPN and the water supply installation prestored in non-volatility memorizer address 3011 The discharge lateral pressure Pon turned is compared.
DPN is in the case of more than Pon, and it is invalid to be considered as separate unit operation start condition in step 221-2, advances to step Rapid 121.In the case that DPN is less than Pon, whether be the condition of high temperature, be not if next pump to be operated is confirmed in step 211-2 The next pump to be operated stored in volatile storage address 1006 is compiled in step 212-2 in the case of the condition of high temperature Number PNO is stored in volatile storage address 1005 as the pump VNO of changed speed operation to be carried out, and afterwards, advances to step 222-2。
It is never high in step 213-3 in the case that next pump to be operated is the condition of high temperature in step 211-2 Selection will carry out the pump numbering of changed speed operation in the pump of temperature state, be updated to the numbering, advance to step 222-2.
It is considered as the establishment of separate unit operation start condition in step 222-2, what is stored in step 223-2 in beginning VNO will The operating of the pump of changed speed operation is carried out, to be operated the next of volatile storage address 1006 in step 224-2 Pump numbering be updated to carry out changed speed operation pump next numbering pump, advance to Fig. 8 step 121.
Then, the parallel operation start for the step 140 of the main control flow chart 8 in embodiment 2 confirms the detailed of processing Feelings, are illustrated with Figure 15.
Figure 15 is divided into Figure 15 A and Figure 15 B for the convenience of paper, but continuous by symbol A, B.The following description will Figure 15 A and Figure 15 B merge into Figure 15 and illustrated.In Figure 15, processing is confirmed with the parallel operation start in explanation embodiment 1 Figure 11 of details difference is step 417-2 and step 418-2, is identical in addition, therefore following only explanation is different Point.
Timer is confirmed in step 416-2 whether in counting, count terminate and in the case of the done state, it is preceding Step 417-2 is proceeded to, next pump to be operated advances to step 422- in the case of not being the condition of high temperature in step 417-2 2.In the case that next pump to be operated is the condition of high temperature, in step 418-2 be never the condition of high temperature pump in selection will The pump numbering of changed speed operation is carried out, the numbering is updated to, advances to step 422-2.Other steps are identical with Figure 11.
As described above, in the present embodiment, it is not right in the case where the motor or frequency converter of stopping have exceeded set point of temperature The motor or frequency converter for having exceeded set point of temperature send the instruction of operating, so as to be motor without cooling fan In the case of, it can prevent the motor for having reached high temperature during to operating from sending the instruction of operating and making the temperature of motor or frequency converter Degree further rise, can realize the protection of the motor or frequency converter in stopping.
【Embodiment 3】
The present embodiment 3 is characterised by, in the case where the motor or frequency converter operated has exceeded set point of temperature, The instruction of stopping is not sent to the motor or frequency converter more than set point of temperature.Thus, prevent because making the electronic of the condition of high temperature The cooling fan that machine stops and made to work with motor linkage stops, and the temperature in motor is increased.And then, by that will use In carry out Stress control progress changed speed operation pump with high operating temperatures in order to which the pump for cooling down and being operated is separately controlled, So that load is scattered, and the Stress control stablized.
Hereinafter, illustrated for the present embodiment 3 with accompanying drawing.
First, it is similarly to Example 1 Fig. 1 to Fig. 7 on structure, the data content of storage part, communication data content, Therefore omit the description.
In addition, in the control flow of the present embodiment 3, at Fig. 8 of main control flow, explanation single pump operation start confirmation Fig. 9 of the details of reason, Figure 10 of the details of explanation Stress control processing, the parallel operation start of explanation confirm the figure of the details handled 11 is same as Example 1, therefore omits the description.
Single pump operating firstly, for the step 150 of the main control flow chart 8 in embodiment 3 stops confirming processing Details, are illustrated with Figure 16.
In Figure 16, stop confirming that Figure 12 of the details of processing difference is with the single pump operating in explanation embodiment 1 Step 530-2 and step 532-2, step 533-2, are identical in addition, therefore only illustrate difference below.
It is considered as in step 522 after the establishment of separate unit shutdown condition, changed speed operation is carried out in step 530-2 Pump be the condition of high temperature in the case of, in step 532-2 will carry out changed speed operation pump numbering next pump as The pump storage of changed speed operation is carried out, starts the operating of the pump of changed speed operation to be carried out in step 533-2, advances to main control The step 151 of flow chart 8.In the case of the pump of changed speed operation is carried out in step 530-2 being not the condition of high temperature, in step Stop the operating for carrying out the pump of changed speed operation in 531-2, advance to Fig. 8 step 151.Other steps and Figure 12 phases Together.So, the motor or frequency converter more than set point of temperature and the motor or frequency converter not less than set point of temperature are separated Control.That is, Stress control (unit number control) is only carried out with normal pump.
Then, the parallel operating for the step 160 of the main control flow chart 8 in embodiment 3 stops confirming the detailed of processing Feelings, are illustrated with Figure 17.
Figure 17 is divided into Figure 17 A and Figure 17 B for the convenience of paper, but continuous by symbol A, B.The following description will Figure 17 A and Figure 17 B merge into Figure 17 and illustrated.In Figure 17, stop confirming processing with the parallel operating in explanation embodiment 1 Figure 13 of details difference is step 630-2 and step 633-2, is identical in addition, therefore following only explanation is different Point.
It is considered as in step 622-2 after parallel shutdown condition establishment, speed change fortune is carried out in step 630-2 In the case that the pump turned is not the condition of high temperature, stops the operating for carrying out the pump of changed speed operation in step 633-2, advance To step 634-2.Other steps are identical with Figure 13.
As described in the present embodiment 3, by the pump of the progress changed speed operation for carrying out Stress control with being at high operating temperatures In the case that cooling and the pump that is operated are separately controlled, the stopping judgement of frequency converter is carried out as illustrated in fig. 18. Rotating speed is preferably reduced in order to reduce the temperature of motor under the condition of high temperature, in addition, if it is possible to using only for carrying out pressure control The pump of the progress changed speed operation of system supplies necessary water, then in order to which the pump for cooling down and operating is handled in Figure 10 Stress control In, step 302 is arrived by step 300, rotating speed is gradually reduced.
In Figure 18, in the case of the instruction that there is the stopping for carrying out self-control device in step 720, step 712 is advanced to. Even if in the case of the instruction that the stopping for carrying out self-control device is not present in step 720, when HzN is non-in step 711 During below the minimum speed NMIN of the motor prestored in volatile storage address 3003, step 712 is also advanced to. Stop the operating of motor in step 712.In the case that HzN has exceeded NMIN in step 711, continue in step 713 The operating of motor.
The cooling effectiveness for the cooling fan that rotating speed works when reducing with motor linkage is also reduced, it is impossible to expect sufficient Cooling effect.Therefore, in the case of rotating speed as defined in being decreased below in the pump under the condition of high temperature, motor is preferably made Operating stops.Can not so expect cooling effect situation or cooling fully and for supply water it is unnecessary in the case of, make electricity The operating of motivation stops.
As described above, in the present embodiment, in the case where the motor or frequency converter operated has exceeded set point of temperature, The instruction of stopping is not sent to the motor or frequency converter more than set point of temperature, thus, is prevented because making the electronic of the condition of high temperature Machine stops and stops the cooling fan being worked with motor linkage so that the temperature in motor rises.In addition, passing through By the pump of the progress changed speed operation for carrying out Stress control, with high operating temperatures in order to which the pump for cooling down and being operated is separated Control, so that load is scattered, and the Stress control stablized.
【Embodiment 4】
The present embodiment 4 is characterised by, more than in order that motor or frequency converter will not overload and prespecified rule Operate to definite value, in the case that motor or frequency converter have exceeded set point of temperature, the frequency converter of the motor stopped to control is sent out Go out the instruction of operating, pump is operated parallel.
That is, exceeded and determined as load current value even in the load current value of the motor operated In the case of setting, before the motor operated exceedes set point of temperature, control what this was being operated The above-mentioned frequency converter of motor does not send the instruction of reduction rotating speed yet.
In addition, before the motor operated exceedes set point of temperature, not to control without the electricity operated The frequency converter of motivation sends the instruction of operating.
And then, in the case where the motor operated has exceeded set point of temperature, carry out being used for pressure control The rotating speed of the motor of the speed control of system is less than the rotating speed of the discharge lift (closing lift) met under closed valve state, above-mentioned super Crossed set point of temperature motor rotating speed under meeting closed valve state discharge lift rotating speed more than in the case of, to control The frequency converter for carrying out the motor of the speed control for Stress control sends the instruction shut down.
It by allowing rotating speed to rise before motor or frequency converter reach a high temperature, can increase the output of every pump Plus, carry out the operating of higher efficiency.Enter regardless of whether which kind of setting environment can play the ability of maximum.
Hereinafter, using brief description of the drawings the present embodiment 4.
In the present embodiment 4, frequency converter is carrying out acceleration instruction in Figure 10 step 303 in order to carry out Stress control When, it is allowed to the higher limit more than the running speed under each operating number is N1A, N2A, N3A, accelerates to and considers the efficiency of pump and peace The maximum speed NMAX of the motor of the non-volatility memorizer address 3002 of full property.Limitation under maximum speed is set herein, The temperature of motor or frequency converter when being not configured to prevent from continuously running rises, but the performance for the pump having by each pump is special Property, exist even if rotating speed, output is improved also because efficiency is decreased without the speed improved, in order to prevent the fortune of poor efficiency Turn, and consider that the rotary shaft of motor is set for the load of rotating speed.
By the way that more than N1A, N2A, N3A ground setting speed, as shown in figure 19, the scope that can be supplied water with 1 pump becomes big.One As for, pump efficiency when rotate at a high speed is uprised, so when making operating number as few as possible with high rotation speed operation, is supplied water Overall more efficient of device, it is possible to achieve energy-conservation.
As shown in figure 19, in the case of calculating terminal pressure constant control, goal pressure P0, P1, P2, P3 are filled with supplying water P0, P1, P2, P3 are different respectively in the case of the target discharge lateral pressure HS identical values put, discharge pressure constant control Value, HS is also the values identical or different from the one party in P0, P1, P2, P3.
In the case of the present embodiment 4, the scope that can be supplied water with 1 pump can change, so P1, P2, P3 can change (this reality Apply in example 4 in order to this differentiation and be denoted as P1 ', P2 ', P3 ').Thus parallel operation start pressure and parallel operating stop pressure The setting prestored in non-volatility memorizer address 3021 to address 3024, but with the water supply model of 1 pump Enclose and correspondingly change.Therefore, parallel operating stopping speed similarly changing.
P1 ' during parallel operation start, P2 ', P3 ' are set to motor or at the time of frequency converter has exceeded set point of temperature The discharge lateral pressure DPN of water supply installation.In the case of making second pump operating, the rotating speed N2D ' when being preferably operated with starting is to close The rotating speed of DPN (being in this case P1 ') is met under valve state, therefore is that flow is with a letter relative to frequency using pump performance Number is directly proportional, and discharge lateral pressure is directly proportional with quadratic function, and the pump similarity law that current value is directly proportional with cubic function uses following formula (1) obtain.
N2D '={ (P2 ' ÷ P2) × N2D }0.5……(1)
Equally, the rotating speed N3D ' during the operation start in the case of the operating of the 3rd pump is made to be obtained with following formula (2).
N3D '={ (P3 ' ÷ P3) × N3D }0.5……(2)
In order to reduce the temperature of motor at high operating temperatures, rotating speed is preferably reduced, it is considered to which motor is reduced in water supply Rotating speed, carries out reduction operating.This point is also contemplated for, when parallel operating stops, parallel operating is considered as according to following 2 conditions and stopped Only condition is set up.
1. stop representing the output for the signal that motor has exceeded set point of temperature, the parallel shutdown condition shown in Figure 13 The situation of establishment,
2. the rotating speed deficiency for having exceeded the motor of set point of temperature meets the feelings of the rotating speed of the discharge lift under closed valve state Condition.
As described in Example 3, by the pump of the progress changed speed operation for carrying out Stress control, with being at high operating temperatures In the case that cooling and the pump that operates are separately controlled, further the 3rd condition of addition.
3. the rotating speed for carrying out the motor of the speed control for Stress control is less than the row met under closed valve state Go out the rotating speed of lift, the rotating speed for having exceeded the motor of set point of temperature is to meet more than the rotating speed of the discharge lift under closed valve state Situation.
That is, rotating speed (HzV), which is decreased below, exports parallel operating under closed valve state and stops pressure (operating number is 2 In the case of be in the case of P2 ', 3 be P3 ') required for rotating speed：Parallel operating stops speed, and (operating number is 2 In the case of be in the case of N2D ', 3 be N3D '), refer to that the pump operated with HzV is not contributed water supply, it is idle State.Therefore, in the case where rotating speed decreases below parallel operating stopping speed, stop parallel operating.
As described above, in the present embodiment, more than in order that motor or frequency converter will not overload and prespecified regulation In the case that the operating of value ground, motor or frequency converter have exceeded set point of temperature, the frequency converter of the motor stopped to control is sent The instruction of operating, makes pump operate parallel.That is, exceeded even in the load current value of the motor operated as volume In the case of the setting determined current value and determined, before the motor operated exceedes set point of temperature, control The above-mentioned frequency converter of the motor operated does not send the instruction of reduction rotating speed yet.In addition, being operated Motor exceed set point of temperature before, the instruction of operating is not sent to frequency converter of the control without the motor operated. And then, in the case where the motor operated has exceeded set point of temperature, carrying out the speed for Stress control The rotating speed of the motor of control is less than the rotating speed of the discharge lift met under closed valve state, above-mentioned to have exceeded the electronic of set point of temperature The rotating speed of machine is in the case of meeting more than the rotating speed of the discharge lift under closed valve state, control to be carried out to be used for pressure control The frequency converter of the motor of the speed control of system sends the instruction shut down.
Thus, by allowing the rising of rotating speed before motor or frequency converter reach a high temperature, motor operation can be made To the limit, make the output increase of every pump, carry out the operating of higher efficiency.Enter regardless of whether which kind of setting environment can be played Maximum ability.
In addition, the present invention is not limited to above-described embodiment, including various modifications example.For example, according to frequency converter in embodiment In a part for the housing of motor, the shell of multiple motor is detected using the temperature detector set in frequency converter It is split that the temperature of temperature or multiple frequency converters, which is illustrated but it is also possible to be frequency converter and motor, uses frequency converter Respective temperature is detected with the temperature detector that motor is each set.In addition, be illustrated by taking 3 pumps as an example, but number of units 3 are not limited to, can be applied in more than 2 water systems.In addition, above-described embodiment is for ease of understanding to illustrate this Invent and describe in detail, be not limited to all structures that must possess explanation.Furthermore it is possible to by the structure of some embodiment A part be replaced into the structure of other embodiment, or add in the structure of some embodiment the structure of other embodiment. In addition, a part for the structure for each embodiment, can add, deletes, replace other structures.
Symbol description
9 ... housings, 10-1,10-2,10-3 ... pump,
17 ... pressure sensing cells, 20-1,20-2,20-3 ... motor,
25 ... cooling fans, 7,30-1,30-2,30-3 ... frequency converter,
33-1,33-2,33-3,43 ... storage parts, 40 ... control devices.

Claims (10)

1. a kind of water supply installation, it is characterised in that including：
Multiple pumps；
Carry out multiple motor of rotation driving respectively to the multiple pump；
The multiple frequency converters for making the rotating speed of the multiple motor change respectively；
Common land is arranged on the pressure sensing cell of the discharge side of the multiple pump；With
The control device of operating/stopping of the multiple frequency converter is controlled,
The multiple frequency converter is arranged in a part for the housing of the periphery for the respective armature for constituting the multiple motor, The temperature of the housing is detected by the temperature detector being arranged in the frequency converter,
The control device detects the case temperature of the multiple motor or the multiple frequency conversion using the temperature detector The temperature of device, in the case where the motor or frequency converter operated has exceeded set point of temperature, is not carried out to control The frequency converter of the motor of operating sends the instruction of operating, and additional pump is operated, and realizes that load is scattered.
2. water supply installation as claimed in claim 1, it is characterised in that：
The control device is in the case where the motor or frequency converter of stopping have exceeded set point of temperature, not to controlling this to exceed The frequency converter of the motor of set point of temperature sends the instruction of operating.
3. a kind of water supply installation, it is characterised in that including：
Multiple pumps；
Carry out multiple motor of rotation driving respectively to the multiple pump；
The multiple frequency converters for making the rotating speed of the multiple motor change respectively；
Common land is arranged on the pressure sensing cell of the discharge side of the multiple pump；With
The control device of operating/stopping of the multiple frequency converter is controlled,
The multiple frequency converter is arranged in a part for the housing of the periphery for the respective armature for constituting the multiple motor, The temperature of the housing is detected by the temperature detector being arranged in the frequency converter,
The multiple motor has the cooling fan by rotating the motor and working in linkage respectively,
The control device detects the case temperature of the multiple motor or the multiple frequency conversion using the temperature detector The temperature of device, in the case where the motor or frequency converter of stopping have exceeded set point of temperature, to having exceeded regulation temperature described in control The frequency converter of the motor of degree sends the instruction of operating.
4. such as water supply installation according to any one of claims 1 to 3, it is characterised in that：
In water supply installation or operating that periphery is provided with the motor and the frequency converter do not work independently in linkage Second cooling fan,
The control device uses the temperature detector, detects the case temperature of the multiple motor or the multiple frequency conversion The temperature of device, in the case where any of the multiple motor or the multiple frequency converter have exceeded set point of temperature, makes The second cooling fan operating, in the multiple motor or the multiple frequency converter not less than the situation of set point of temperature Under, operate second cooling fan.
5. water supply installation as claimed in claim 1, it is characterised in that：
In the case where the running speed of the motor is less than setting, the control device described in control to having exceeded regulation The frequency converter of the motor of temperature sends the instruction shut down.
6. water supply installation as claimed in claim 3, it is characterised in that：
In the case where the motor or frequency converter operated has exceeded set point of temperature, the control device is not to control The frequency converter of the motor for having exceeded set point of temperature sends the instruction of stopping.
7. the water supply installation as described in claim 1 or 6, it is characterised in that：
The control device is by the motor or frequency converter for having exceeded set point of temperature and the motor not less than set point of temperature Or frequency converter is separately controlled.
8. a kind of water supply installation, it is characterised in that including：
Multiple pumps；
Carry out multiple motor of rotation driving respectively to the multiple pump；
The multiple frequency converters for making the rotating speed of the multiple motor change respectively；
Common land is arranged on the pressure sensing cell of the discharge side of the multiple pump；With
The control device of operating/stopping of the multiple frequency converter is controlled,
The multiple frequency converter is arranged in a part for the housing of the periphery for the respective armature for constituting the multiple motor, The temperature of the housing is detected by the temperature detector being arranged in the frequency converter,
The control device detects the case temperature of the multiple motor using the temperature detector, is carried out even in In the case that the load current value of the motor of operating has exceeded the setting determined as load current value, entering at this The motor of row operating exceedes before set point of temperature, controls the frequency converter of the motor operated not send drop The instruction of the slow-speed of revolution.
9. water supply installation as claimed in claim 8, it is characterised in that：
Before the motor operated exceedes set point of temperature, the control device is to controlling what is do not operated The frequency converter of motor sends the instruction of operating.
10. water supply installation as claimed in claim 8, it is characterised in that：
In the case where the motor operated has exceeded set point of temperature,
Meet the discharge under closed valve state when the rotating speed for the motor for carrying out the speed control for Stress control is less than and raise The rotating speed of journey, and the motor for having exceeded set point of temperature rotating speed be meet under closed valve state discharge lift rotating speed with When upper,
The frequency converter that the control device is carrying out the motor of the speed control for Stress control to control sends stopping The instruction of operating.
CN201380078513.8A 2013-10-24 2013-10-24 Water supply installation Expired - Fee Related CN105637224B (en)

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PCT/JP2013/078858 WO2015059800A1 (en) 2013-10-24 2013-10-24 Water supply device

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JP2022548806A (en) * 2019-09-18 2022-11-22 ７アールディーディー リミテッド pressure washer
CN110762733A (en) * 2019-10-30 2020-02-07 南京亚派软件技术有限公司 Online frequency conversion control method and device for cooling pump of central air conditioner
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