CN106150998B - The control method of pump installation, Long-Range Surveillance Unit and pump installation - Google Patents
The control method of pump installation, Long-Range Surveillance Unit and pump installation Download PDFInfo
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- CN106150998B CN106150998B CN201610320258.9A CN201610320258A CN106150998B CN 106150998 B CN106150998 B CN 106150998B CN 201610320258 A CN201610320258 A CN 201610320258A CN 106150998 B CN106150998 B CN 106150998B
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- controlling curve
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- 238000009434 installation Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000012546 transfer Methods 0.000 claims abstract description 11
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- 230000005540 biological transmission Effects 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 129
- 238000004891 communication Methods 0.000 description 33
- 238000012545 processing Methods 0.000 description 26
- 239000000523 sample Substances 0.000 description 6
- 238000009825 accumulation Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 230000001186 cumulative effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
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- 238000012937 correction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
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- 235000009566 rice Nutrition 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
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
- F04B49/08—Regulating by delivery pressure
-
- 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
- F04B2205/00—Fluid parameters
- F04B2205/05—Pressure after the pump outlet
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The present invention provides the control method of pump installation, Long-Range Surveillance Unit and pump installation.Most suitable goal pressure controlling curve corresponding with operational situation is automatically determined in presumption terminal pressure constant control.Pump installation has the pump of transfer liquid and the motor of transfer tube.In addition, pump installation has the control unit for controlling motor in a manner of making the discharge lateral pressure of pump become the goal pressure on goal pressure controlling curve.Also, control unit is smaller than defined rotary speed threshold value in the average value of the revolving speed of the motor in the 1st stipulated time and the average value of goal pressure in the 2nd stipulated time corrects goal pressure controlling curve in a manner of reducing goal pressure than the defined pressure threshold hour on goal pressure controlling curve.In addition, control unit corrects goal pressure controlling curve in a manner of increasing goal pressure when the average value of the revolving speed of the motor in the 1st stipulated time is defined rotary speed threshold value or more.
Description
Technical field
The present invention relates to the control methods of pump installation, Long-Range Surveillance Unit and pump installation.
Background technique
Pump installation is widely used as supplying the water supply device of water to building.Fig. 1 is the signal for indicating common water supply device
Figure.As shown in Figure 1, the suction inlet of water supply device 100 is connect via ingress pipe 5 with water pipe 4 or water reception tank (not shown).It is supplying water
Water supplying pipe 7 is connected on the outlet of device 100, the water supply utensil (such as tap) of each layer of the water supplying pipe 7 and building
Connection.Water supply device 100 will be pressurized from the water of water pipe 4 or water reception tank and supply water to each water supply utensil of building.
The water supply device 100 that the suction side of pump directly links via ingress pipe 5 and water pipe 4 has pump 2, drives the pump 2
As the motor 3 of driving source and the frequency converter 20 as driving device of variable speed drive motor 3.In addition, water supply device 100
It includes the anti-backflow device 25 for the suction side configured in pump 2, configure the pressure sensor in the suction side of anti-backflow device 25
21, flow switch 24, the pressure sensing of the check-valves 22 for the discharge side configured in pump 2 and the discharge side configured in check-valves 22
Device 26 and pressurized tank 28.These structural elements are accommodated in the shell 30 of water supply device 100.In addition, there is also do not have shell
The water supply device of 30 type.
Bypass pipe 8 for only being supplied water by the pressure of water pipe 4 is located between ingress pipe 5 and water supplying pipe 7, on side
Siphunculus 8 is equipped with check-valves 23.In the example depicted in figure 1, it is equipped with two groups of pumps 2, motor 3, check-valves 22 and flow switch 24,
They are arranged side by side.In addition it is also possible to which one group or three groups or more of pump, motor, check-valves and flow switch is arranged.Direct
In coupled water supply device, as shown in Figure 1, the suction side of pump 2 is connect with water pipe 4, but in the water supply device of water reception tank formula, pump
2 suction side is connect via ingress pipe 5 with water reception tank.In the case where the water supply device of the water reception tank formula, do not have shown in Fig. 1
Anti-backflow device 25, suction side pressure sensor 21 and bypass pipe 8.
Check-valves 22 is located on the discharge pipe 32 connecting with the outlet of pump 2, is for preventing the inverse of water when pumping 2 stopping
The valve of stream.Flow switch 24 is to detect the flow of the flowing water in discharge pipe 32 to reduce to specified value, detect very few water
Flow detector.Pressure sensor 26 be for measure pump 2 discharge lateral pressure (after, discharge side pressure representative is by pressure
Sensor 26 measure pressure value) hydraulic pressure mensuration device.Pressurized tank 28 is for the discharge lateral pressure during keeping pump 2 to stop
Pressure vessel.
Water supply device 100 has the control unit 35 of control water supply movement.Frequency converter 20, flow switch 24, pressure sensor
21, pressure sensor 26 is connect via signal wire with control unit 35.When detecting very few water by flow switch 24, control unit
35 issue instruction to frequency converter 20 in a manner of the temporary running speed for improving pump 2, make the fortune of pump 2 after pressure accumulation in pressurized tank 28
Turn to stop.
When using water in building in the state that pump 2 stops, 2 discharge side pressure reduction is pumped.When the discharge side
When pressure reduction to defined starting pressure, control unit 35 makes 2 starting of pump.Specifically, control unit 35 is to start the drive of motor 3
Dynamic mode is issued to frequency converter 20 and is instructed.In the operating of pump 2, the presumption constant control of terminal pressure is carried out based on discharge lateral pressure
System.
When the use of the water in building is reduced, flow switch 24 detects very few water, and by the detection signal to control
Portion 35 processed is sent.Control unit 35 receives the detection signal, and issues an instruction to that 2 revolving speeds of pump is made to be increased up discharge to frequency converter 20
Lateral pressure stops pressure as defined in reaching, and stops pump 2 after pressure accumulation in pressurized tank 28.
In presumption terminal pressure constant control, by correspondingly making mesh with the drag losses in the water supplying pipe in building
Mark pressure properly change, and from water supply device 100 by be located at end water supply utensil in hydraulic pressure control be it is constant.Fig. 2 is
For illustrating to estimate the service performance curve graph of the pump of an example of terminal pressure constant control.In the left figure of Fig. 2, horizontal axis
It is the flow of water, the longitudinal axis is discharge pressure i.e. lift (head).In addition, horizontal axis is revolution speed in the right figure of Fig. 2, the longitudinal axis is
Discharge pressure, that is, lift (head).
When PA shown in Fig. 2 is the maximum stream flow of the water supply utensil from water supply device 100 to end discharge lateral pressure (with
Under be denoted as PA).Maximum stream flow said here refers to flow when using all water supply utensils in building with maximum amount of water.
In addition, the discharge lateral pressure (being denoted as PB below) when PB is the cutout operating of the water supply utensil from water supply device 100 to end.?
Discharge lateral pressure when cutout described in this operates refers to will be from water supply when flow is 0 in all water supply utensils in building
Device 100 is located at highest and supply pressure needed for the water supply utensil of farthest position (i.e. the position of end) and to the water supply
Value obtained by the pressure loss generated in pipeline until utensil is added.It is by pump 2 with the curve that appended drawing reference NMAX is indicated
Performance determine maximum speed NMAX operating pump 2 when pump 2 head curve.With the curve that appended drawing reference NMIN is indicated be with
Revolving speed (cutout revolving speed) NMIN for reaching pressure PB operates the head curve of the pump 2 when pumping 2.In addition, P05 is maximum speed NMAX
Under cutout operating when discharge lateral pressure (below by maximum speed be denoted as NMAX, by cutout operate when PB under revolving speed remember
P05 is denoted as NMIN, by the lift to stop when operating with NMAX).The delivery flow usually pumped is directly proportional to the revolving speed of pump, and pumps
Total head and the revolving speed of pump it is square directly proportional, therefore from the water supply utensil that the conic section that PA and PB pass through becomes end
Pipe resistance curve R.By making intersection point as head curve Nm and pipe resistance curve R of the pump 2 under arbitrary revolving speed
Operation point at operate, and the pressure PB in the water supply utensil of end is remained constant.
Illustrate the goal pressure controlling curve C for estimating terminal pressure constant control using the right figure of Fig. 2.In figure
C0 is cutout run curve.In the case where pumping 2 suction side pressure and being 0, C0 be from the point of pressure=0 and revolving speed=0 and
The conic section that the point of P05 and NMAX passes through.Goal pressure controlling curve C is the point of the point and PB and NMIN from PA and NMAX
By conic section.Pressure PB is controlled in the water supply utensil from water supply device 100 to end and (passes through target to be constant
Pressure PA carries out presumption terminal pressure constant control) in the case where, as it was earlier mentioned, due to the delivery flow of pump 2 and turning for pump 2
Rapid-result direct ratio, so setting target according to the revolving speed Nm and goal pressure controlling curve C of pump 2 corresponding with current flow QN
Pressure PN.
Therefore, when flow is less, the goal pressure that lateral pressure is discharged is reduced, the required power drop of corresponding ground pump 2
Low and revolving speed reduces, and is achieved in energy-saving operation.
In addition, in Fig. 2, when setting pressure PB in the pressure PB mode equal with pressure PA, 35 row of execution of control unit
Out pressure constant control rather than presumption terminal pressure constant control.In this case, control unit 35 is to be discharged lateral pressure holding
The mode of PA (=PB) controls the revolving speed of pump 2.
Existing technical literature
Patent document
Patent document 1: International Publication No. WO2012/099242
Patent document 2: Japanese Unexamined Patent Publication 2014-214715 bulletin
Patent document 3: Japanese Unexamined Patent Publication 2014-214743 bulletin
Summary of the invention
It is accurately real due to being difficult to about goal pressure controlling curve C in above-mentioned presumption terminal pressure constant control
The PA and PB of the set building of border measurement, so in order to the water supply utensil (such as tap) all into building
Water is supplied with enough pressure, and PA and PB are set as value to a certain extent with ampleness.Therefore, patent document 1 mentions
A kind of flow that can ensure to need and the water supply device that can be pumped with lower rotation speed operation out.It, will be more according to patent document 1
A goal pressure controlling curve is stored in advance in control unit, and pump is controlled based on some goal pressure controlling curve.
Therefore, by selecting most suitable goal pressure controlling curve from pre-prepd multiple goal pressure controlling curves, and energy
Enough realize energy-saving operation.
But water supply device documented by patent document 1 is by manually come selection target pressure controlling curve, and passes through hand
It moves to switch over, there is no the selections and switching that automatically carry out goal pressure controlling curve.In addition, due to used mesh
Marking pressure controlling curve is selected from the multiple goal pressure controlling curves being stored in advance in control unit, so can not root
The adjustment of goal pressure controlling curve itself is carried out according to the operational situation of water supply device.The operational situation of water supply device may root
Change according to the time.For example, in school, during the break between the usage amount of water can sharply increase, and do not used substantially at night
Water.Like this, since the operational situation of water supply device may change according to time or other factors, it is desirable to automatically adjust
Whole most suitable goal pressure controlling curve.Moreover, in order to realize further energy conservation, it is also desirable to adjust most suitable target pressure
Power controlling curve.
In addition, the variation of discharge pressure when water supply device documented by patent document 2,3 is based on pump startup adjusts most
Suitable goal pressure controlling curve.But such as in the extensive apartment more than resident's number use pump installation the case where etc. under,
It is to use water in 24 hours mostly.In this case, the chance for stopping and starting pump is few, adjusts the chance of goal pressure controlling curve
It tails off.Especially, in newly-built apartment etc., the case where the number of moving in gradually increases etc. under, if using when the number of moving in is few
Set goal pressure controlling curve, then when moving in number increase, water supply is possible to insufficient.In addition, if from the beginning with
For set target pressure controlling curve the case where moving in number increase, then when the number of moving in is few, energy loss be will increase.
The present invention is to research and develop in view of the above circumstances, target be presumption terminal pressure constant control in automatically
Determine most suitable goal pressure controlling curve corresponding with operational situation.
Pump installation of the invention has the pump of transfer liquid and the motor of transfer tube.In addition, pump installation have so that pump
The mode that discharge lateral pressure becomes the goal pressure on goal pressure controlling curve controls the control unit of motor.Also, control unit
Average value in the revolving speed of the motor in the 1st stipulated time is smaller than defined rotary speed threshold value and the target pressure in the 2nd stipulated time
The average value of power is corrected in a manner of reducing goal pressure than the defined pressure threshold hour on goal pressure controlling curve
Goal pressure controlling curve.In addition, the average value of the revolving speed of motor of the control unit within the 1st stipulated time is defined revolving speed threshold
Goal pressure controlling curve is corrected in a manner of increasing goal pressure when being worth above.
According to the structure, pump installation of the invention can automatically determine it is corresponding with the operational situation of pump installation most
Suitable goal pressure controlling curve.
In addition, defined rotary speed threshold value is also possible to the rated speed of motor.
When as a result, in the range of 1 stipulated time with high revolving speed drive motor, it is capable of increasing goal pressure.
In addition, defined pressure threshold is also possible to the median of the goal pressure on goal pressure controlling curve.
As a result, within the 2nd stipulated time, when compared with the median of the goal pressure on goal pressure controlling curve low
Press side continually drive motor when, goal pressure can be reduced.
In addition, control unit can goal pressure average value than the defined pressure threshold on goal pressure controlling curve
Hour corrects goal pressure controlling curve in a manner of making goal pressure only reduce the 1st pressure.Also, it can also be in the flat of revolving speed
Mesh is corrected in a manner of making goal pressure only increase 2nd pressure bigger than the 1st pressure when mean value is defined rotary speed threshold value or more
Mark pressure controlling curve.
Thereby, it is possible to inhibit the discharge side insufficient pressure of pump.
Long-Range Surveillance Unit of the invention is communicated with pump installation, and wherein pump installation has the pump of transfer liquid, driving
The motor of pump and by make the discharge lateral pressure of pump as the goal pressure on goal pressure controlling curve in a manner of control motor
Control unit.Long-Range Surveillance Unit includes and receives the revolving speed receiving unit of the revolving speed of motor, the pressure for the goal pressure for receiving pump receives
Portion and the revision directive transmission unit for sending the instruction for correcting goal pressure controlling curve to control unit.Revision directive transmission unit
Average value in the revolving speed of the motor in the 1st stipulated time is smaller than defined rotary speed threshold value and received in the 2nd stipulated time
The average value of goal pressure will be so that goal pressure reduces than the defined pressure threshold hour on goal pressure controlling curve
The instruction that mode corrects goal pressure controlling curve is sent to control unit.In addition, revision directive transmission unit is within the 1st stipulated time
Received motor revolving speed average value be defined rotary speed threshold value more than when will by make goal pressure increase in a manner of correct
The instruction of goal pressure controlling curve is sent to control unit.
According to the structure, Long-Range Surveillance Unit of the invention can be automatically determined by remotely operating to be filled with pump
The operational situation set most suitable goal pressure controlling curve accordingly.
The control method of pump installation of the invention is the motor of pump and transfer tube with transfer liquid and so that the row pumped
Lateral pressure becomes the mode of the goal pressure on goal pressure controlling curve to control the control method of the pump installation of motor out.?
In the control method of the pump installation, the revolving speed of motor is obtained, and obtains the goal pressure of pump.Also, in the controlling party of pump installation
In method, the average value in the revolving speed of the motor in the 1st stipulated time is smaller than defined rotary speed threshold value and obtaining in the 2nd stipulated time
The average value for the goal pressure got is than the defined pressure threshold hour on goal pressure controlling curve so that goal pressure subtracts
Small mode corrects goal pressure controlling curve.In addition, the acquisition in the control method of pump installation, within the 1st stipulated time
To revolving speed average value be defined rotary speed threshold value more than when by make goal pressure increase in a manner of correct goal pressure control
Curve.
According to the structure, the control method of pump installation of the invention can automatically determine the operating shape with pump installation
Condition most suitable goal pressure controlling curve accordingly.
Detailed description of the invention
Fig. 1 is the schematic diagram for indicating common water supply device.
Fig. 2 is the service performance curve graph for the pump for illustrating to estimate an example of terminal pressure constant control.
Fig. 3 is the signal for indicating the water supply device of an example of the pump installation as an embodiment of the invention
Figure.
Fig. 4 is the pump for an example for illustrating the presumption terminal pressure constant control of an embodiment of the invention
Service performance curve graph.
Fig. 5 is the flow chart for indicating an example of controlling curve setting processing.
Fig. 6 is the curve graph for indicating for goal pressure controlling curve to be adapted to an example of low-pressure side.
Fig. 7 is the curve graph for indicating for goal pressure controlling curve to be adapted to another example of low-pressure side.
Fig. 8 is the curve graph for indicating an example of time change for discharge lateral pressure.
Fig. 9 is the curve graph for indicating another example of the time change of goal pressure of pump.
Figure 10 is the signal for indicating an example of pump installation and Long-Range Surveillance Unit of an embodiment of the invention
Figure.
Figure 11 is to indicate that another example of the pump installation and Long-Range Surveillance Unit of an embodiment of the invention shows
It is intended to.
Description of symbols
1,1A, 100 water supply devices
2 pumps
3 motors
8 bypass pipes
20 frequency converters
20a speed probe
21 pressure sensors
22,23 check-valves
24 flow switches
25 anti-backflow devices
26 pressure sensors
28 pressurized tanks
35,40 control unit
46 configuration parts
47 storage units
48 operational parts
49 display units
50 portions I/O
51 operating panels
52 communication units
60 Long-Range Surveillance Units
66 configuration parts
67 storage units
68 operational parts
69 display units
70 portions I/O
71 operating panels
72 communication units
80 communication devices
90 common lines
Specific embodiment
Illustrate embodiments of the present invention referring to the drawings.In addition, in the accompanying drawings, being wanted to same or equivalent structure
Element marks identical appended drawing reference and the repetitive description thereof will be omitted.
(the 1st embodiment)
Fig. 3 is the signal for indicating the water supply device of an example of the pump installation as an embodiment of the invention
Figure.As shown in figure 3, the control unit 40 of water supply device 1 has storage unit 47, operational part 48, the portion I/O 50, configuration part 46 and display
Portion 49.Configuration part 46 and display unit 49 are mounted on the operating panel 51 of water supply device 1.In addition, the structure other than control unit 40
It is roughly the same with the previous structure of water supply device 100 shown in FIG. 1.
Configuration part 46 is used to set the pass between the delivery flow Q for indicating pump 2 and discharge lateral pressure P by peripheral operation
The various setting values of the goal pressure controlling curve of system etc..Set various setting values are stored in storage in configuration part 46
In portion 47.As an example, stop when user can input PB, PA, NMAX, P05, very few water via configuration part 46
Only pressure Pd2, starting pressure Pd1 and other control needed for information.
Display unit 49 is functioned as man-machine interface, shows the various numbers of setting value being stored in storage unit 47 etc.
According to and current pump 2 operational situation (operating condition), such as pump 2 operating or stopping, operating frequency, electric current, discharge side pressure
Power, feed pressure (the case where directly connection is supplied water), water reception tank alarm etc..
As storage unit 47, the memories such as RAM, ROM are used.In storage unit 47, it is stored with the control flow chart with Fig. 5
The control program of expression and data (PB, the duration of runs, the aggregate-value of the operation result in various data, such as operational part 48
Deng), pressure value (discharge lateral pressure, feed pressure), the data inputted by configuration part 46 and inputted by the portion I/O 50 or
The data etc. exported by the portion I/O 50.
As the portion I/O 50, port etc. is used.The portion I/O 50 receives the output valve and flow switch 24 of pressure sensor 26
Signal is simultaneously sent to operational part 48.In addition, in the present embodiment, detecting the speed probe 20a installation of the revolving speed Nm of motor 3
On frequency converter 20.The portion I/O 50 receives the detected value (the revolving speed Nm of motor 3) of speed probe 20a via frequency converter 20 simultaneously
It is sent to operational part 48.But speed probe 20a is not limited to be located on frequency converter 20.In addition, in speed-sensorless
In the case that ground uses the frequency converter 20 for carrying out revolving speed control, speed probe 20a is not present and is virtual.The portion I/O 50
The input and output of signal in being communicated.
As operational part 48, CPU is used.Operational part 48 based on the program and various data being stored in storage unit 47, with
And the signal inputted from the portion I/O 50, it is Lai Jinhang PA, the determination of PB, the measurement of time (duration of runs, dwell time), accumulative
Operation (aggregate-value), the processing of communication data, the operation of goal pressure, the operation of frequency instruction value (rotating speed of target), target pressure
The amendment etc. of power controlling curve.Output from operational part 48 is input into the portion I/O 50.
In addition, the portion I/O 50 and frequency converter 20 are connected with each other by communication modes such as RS422,232C, 485.From the portion I/O
50 send the control signal such as various setting values, frequency instruction value, start stop signal (operating/stop signal) to frequency converter 20, from change
Frequency device 20 gradually sends the operational situations such as actual frequency values, current value (operating condition) to the portion I/O 50.
In addition, being able to use analog signal as the control signal transmitted and received between the portion I/O 50 and frequency converter 20
And/or digital signal.For example, analog signal can be used to speed etc., digital signal is used to operating halt instruction etc..
Fig. 4 is the pump for an example for illustrating the presumption terminal pressure constant control of an embodiment of the invention
Service performance curve graph.Especially, it as long as no record, then uses appended drawing reference identical with Fig. 2 and omits the description.It is first
First, since PA and PB are difficult to actual measurement, so when water supply device 1 is arranged, according to height and amount etc. based on building
The guess value of determining water supply sets PA and PB.
Pd1 shown in Fig. 4 is the starting pressure as threshold value for making 2 starting of pump.Here, as an example, it will
Starting pressure Pd1 is set as subtracting the value (PA-3m) after 3m (rice) from PA.
When using water in the state that motor 3 and pump 2 stop, discharge lateral pressure Pm is reduced.Also, when by pressure sensing
The discharge lateral pressure Pm that device 26 detects is when being reduced to preset starting pressure Pd1 or less, 40 starter motor 3 of control unit thus
Starting pump 2.
As shown in the right figure of Fig. 4, control unit 40 sets target based on goal pressure controlling curve C and current revolving speed Nm
Pressure PN, and carry out the revolving speed (speed) that variable-ratio controls motor 3 (pump 2) via frequency converter 20.That is, the control of control unit 40 becomes
Defined alternating voltage or DC voltage are simultaneously applied to motor 3 by frequency device 20, to make 3 speed change of motor.With the rotation of motor 3
As high speed, 2 discharge rate increase is pumped, discharge lateral pressure Pm increases.Control unit 40 is to be discharged lateral pressure Pm and goal pressure PN
Consistent mode controls the revolving speed of pump 2.In addition, shaking in transfer tube 2, such as by modulating (PWM) or pulse with pulse width
Width modulates (PAM) infinitely to control alternating voltage, and can be efficiently to operate pump 2 at a high speed.
In the operating of pump 2, when the reduction of the usage amount of water, discharge reduction and flow switch 24 act, the operating for pumping 2 stops
Only.When the pump 2 stops, the running speed by temporarily improving pump 2 (motor 3) will be discharged lateral pressure Pm and improve to regulation
Stopping pressure Pd2, and in pressurized tank 28 to enough water carry out pressure accumulation (pressure accumulation operating).Finally, in by pressurized tank 28
Water boost to stop pressure Pd2 in the state of stop motor 3.
In addition it is also possible to start to cancel the signal from flow switch 24 in the regular hour after starting in pump 2.By
This, is even if causing within a period of time after pump 2 starts in the immobilising situation of water in the various conditions due to supply equipment,
Also it can prevent from stopping pump 2 because detecting very few water.Alternatively, it is also possible to be, in the discharge lateral pressure Pm ratio of pump 2 regulation
Be worth it is low in the case where sending signal from flow switch 24 without pump 2 stopping processing mode to control unit 40 into
Row programming.Thereby, it is possible to reduce the frequency of the starting processing of the stopping processing of pump 2 and subsequent pump 2, to seek the resistance to of device
The raising of long property and long lifetime.
Control unit 40 can carry out operation to stopping pressure Pd2 based on the PA and PB being stored in storage unit 47.For example,
Operation is carried out in a manner of becoming PA or PB+3m to stopping pressure Pd2.In addition, control unit 40 also can be to the starting pressure of pump 2
Pd1 carries out operation, for example, carrying out operation in a manner of starting pressure Pd1 if the difference if PA and PB is within 3m as PA-3m.
Alternatively, it is also possible to carry out operation to PB according to the PA of input.Such as the extreme higher position of water end be high building
Layer 5 in the case where, PA can be set as 14m, the 12m that 15% is about reduced from PA is set as PB.Like this, PB is set
Fixed lower than PA about 15% be because, it is contemplated that the amount for being piped resistance is about 15% or so.
For example, it is also possible to input PA and ratio D% via the configuration part 46 of above-mentioned control unit 40, and pass through PB=
PA- (PA × D%) finds out PB.Or input pressure PA and differential pressure PD and PB is found out by PB=PA-PD.
Control unit 40 corrects goal pressure controlling curve based on the operating condition of pump 2.Fig. 5 is to indicate to be executed by control unit
Controlling curve setting processing an example flow chart.In addition, only carrying out presumption end pressure after the step S110 of Fig. 5
It is executed in the case where power constant control, the pressure accumulation in pump stops and when small water stops does not execute when operating.
When the power initiation of control unit 40, control unit 40 sets initial goal pressure controlling curve C (step first
S100).The initial goal pressure controlling curve C is the goal pressure controlling curve C determined by PA, PB and NMAX, NMIN, is
Modified benchmark.About the setting of initial goal pressure controlling curve C, such as will be as pump performance in factory shipment
NMAX and cutout pressure P05 are stored in storage unit 47, can be from user to configuration part 46 and when water supply device 1 is arranged
Input PA, PB is simultaneously set based on the data being stored in storage unit 47.In addition, bent in the goal pressure control currently utilized
In the case that line is stored in storage unit 47, it is able to use stored goal pressure controlling curve.
Then, control unit 40 will turn when pump 2 starts and starts to estimate terminal pressure constant control as initial treatment
Fast aggregate-value Sn and pressure aggregate-value Sp reset to value 0 (step S110), and start to reset the timing (step of clocking value ta
S120).When starting timing, control unit 40 obtains the revolving speed Nm of the motor 3 from speed probe 20a and by estimating end
Pressure controls the goal pressure PN (step S130) calculated.The revolving speed Nm that control unit 40 will acquire is accumulated to revolving speed aggregate-value
In Sn, and the goal pressure PN that will acquire is accumulated in pressure aggregate-value Sp (step S140).Also, control unit 40 repeats
The processing of step S130, S140 is executed, until clocking value ta becomes reference point tr1 or more (step S150).That is, control
Portion 40 adds up the revolving speed Nm and goal pressure PN of motor 3 during stipulated time tr1.
When clocking value ta becomes reference point tr1 or more, control unit 40 is come with the number of repetition K1 of step S130~S150
Except revolving speed aggregate-value Sn and pressure aggregate-value Sp, and calculate mean speed Mn and average goal pressure Mp (step S160).
Then, mean speed Mn is compared (step S170) with rotary speed threshold value Nr1 by control unit 40.Here, in this reality
It applies in mode and rotary speed threshold value Nr1 is set as revolving speed Nmax.The processing of step S170 determines whether motor 3 controls in goal pressure
The operation point of maximum pressure on curve C is nearby driven.But rotary speed threshold value Nr1 is also possible to subtract rule from revolving speed Nmax
Fixed nargin is set.
When mean speed Mn is less than rotary speed threshold value Nr1 (step S170: no), control unit 40 judges into motor 3 not
Continually driven at the operation point of height output.In this case, then control unit 40 by average pressure Mp and pressure threshold
Ps is compared (step S190).In the present embodiment, pressure threshold Ps is set as to the PA and PB of goal pressure controlling curve
Median.Whether the processing of step S190 determines motor 3 at the operation point of the low output on goal pressure controlling curve
It is driven.But in the processing of step S190, as long as the pressure threshold on goal pressure controlling curve can be with average pressure
The value that Mp is compared is not limited to the median of PA and PB.
(the step when mean speed Mn is less than rotary speed threshold value Nr1 and average pressure Mp is pressure threshold Ps or more of control unit 40
Rapid S170: no, step S190: no) motor 3, is judged by current goal pressure controlling curve at preferred operation point
It is driven.In this case, control unit 40 does not correct goal pressure controlling curve and returns to the processing of step S110.
(the step when mean speed Mn is less than rotary speed threshold value Nr1 and average pressure Mp is less than pressure threshold Ps of control unit 40
S170: no, step S190: yes) motor 3, is judged by current goal pressure controlling curve only in the operation point of low output
Place is driven.In this case, control unit 40, which judges into, to be displaced to low-pressure side for current goal pressure controlling curve, and
Goal pressure controlling curve is adapted to low-pressure side (step S200), back to the processing of step S110.
On the other hand, control unit 40 judges into when mean speed Mn is rotary speed threshold value Nr1 or more (step S170: yes)
Motor 3 is driven near the operation point of the maximum pressure on goal pressure controlling curve by current goal pressure controlling curve
It is dynamic.In this case, the water supply that control unit 40 judges by current goal pressure controlling curve to supply equipment is possible to
Goal pressure controlling curve is adapted to high pressure side (step S180) by deficiency, back to the processing of step S110.Here, excellent
Control unit 40 is selected to correct greatly compared with when being adapted to low-pressure side when goal pressure controlling curve is adapted to high pressure side.
In controlling curve setting processing described above, step S110 processing below, Lai Xiuzheng target are repeated
Pressure controlling curve.But it is not limited to such example, it is also possible to only performing step with predetermined number
When rapid S110 processing below, the processing of 40 finishing control curve setting of control unit.Alternatively, it is also possible to be, in no amendment target
When pressure controlling curve, judges into current goal pressure controlling curve and be suitble to, the processing of 40 finishing control curve setting of control unit.
Control unit 40 can be held again when finishing controlling curve setting processing in predetermined timing (such as every several days etc.)
Row controlling curve setting processing can also execute controlling curve setting processing based on the instruction from outside again.In addition, setting
Fixed controlling curve also can be set upper and lower on the basis of the initial goal pressure controlling curve C set in the step s 100
Limit value.
In addition, in above-mentioned controlling curve setting processing, by the revolving speed Nm of motor 3 and goal pressure PN in the same time
Add up in range.But the cumulative time of revolving speed Nm can be longer than the cumulative time of goal pressure PN or short.
In addition, revolving speed Nm has used the feedback signal from frequency converter 20, but also can be used from control unit 40 to frequency conversion
The instruction revolving speed (rotating speed of target) of device 20.
Fig. 6 is the curve graph for indicating to be adapted to goal pressure controlling curve by control unit one example of low-pressure side.
In the example shown in Fig. 6, control unit 40 is by only reducing the PA and PB of current goal pressure controlling curve C by rule with pressure
The mode (to low lift side) of definite value Δ P moves in parallel, to determine new goal pressure controlling curve C '.(the pump of motor 3 as a result,
2) it is operated relative to delivery flow QN with low revolving speed Nm '.
Fig. 7 is the curve for indicating to be adapted to goal pressure controlling curve by control unit another example of low-pressure side
Figure.In the example shown in Fig. 7, control unit 40 calculates new PB ' by subtracting specified value Δ P from PB.Also, in Fig. 7
Coordinate system in, by will be according to the specific point of delivery flow 0 and PB ' and according to maximum stream flow QMAX and corresponding pressure PA
Specific point is linked with conic section, to determine new pipe resistance curve R '.Such modified result is current target
Pressure controlling curve C's is substantially whole mobile (displacement) to low lift side.In this case, motor 3 (pump 2) is also relative to discharge
Flow QN is operated with low revolving speed Nm '.It is new to calculate alternatively, it is also possible to subtract specified value Δ P from PA by replacement PB
PA ' determines new pipe resistance curve R '.
Only at the operation point of low output drive motor 3 it is meant that according to line loss to adjust water a possibility that it is high,
And a possibility that can be realized sufficient water supply movement reducing the revolving speed of pump 2, is high.Therefore, by by current target pressure
Power controlling curve C is adapted to low lift side and can be realized energy-saving operation.
In order to avoid the sharply variation of the discharge pressure of pump 2, preferably gradually cut from current goal pressure controlling curve C
Change to new goal pressure controlling curve C '.For example, can be in defined passage time (such as 10 seconds) range from current
Goal pressure controlling curve C is slowly switched to new goal pressure controlling curve C ', or can also be with defined change rate
New goal pressure controlling curve C ' is slowly switched to from current goal pressure controlling curve C.
When goal pressure controlling curve is adapted to high pressure side be identical when being adapted to low-pressure side.Namely
It says, control unit 40 can make the PA and PB of current goal pressure controlling curve C are parallel in a manner of only increasing specified value Δ P to move
It moves to determine new goal pressure controlling curve C '.Alternatively, it is also possible to be determined to the side in PA and PB plus specified value Δ P
New goal pressure controlling curve C '.
Fig. 8 is the curve graph for indicating an example of time change for discharge lateral pressure.In the example shown in Fig. 8, exist
The average value Mp that discharge lateral pressure Pm is calculated during the moment t1 to moment t2, since average pressure Mp is less than pressure threshold
Ps, so goal pressure controlling curve is adapted to low lift side.The energy-saving of water supply device 1 is sought as a result,.
Fig. 9 is the curve graph for indicating another example of the time change of goal pressure of pump.Example shown in Fig. 9
In, goal pressure PN becomes near PA during from moment t3 to moment t4.Turn at this point, the revolving speed Nm of motor 3 becomes maximum
Near fast Nmax.Therefore, in the example shown in Fig. 9, goal pressure controlling curve is adapted to high lift side in moment t4.This
When, if revolving speed Nm becomes NMAX, goal pressure PN becomes PA '.Here, in the present embodiment, as shown in figure 9, by mesh
When mark pressure controlling curve is adapted to high lift side, compared with goal pressure controlling curve is adapted to low lift side, correct
Greatly.Thereby, it is possible to more reliably inhibit the insufficient water from water supply device 1.
As can be seen from figures 8 and 9, in the water supply device of present embodiment 1, operating pump 2 when, can automatically determine with
The operational situation most suitable goal pressure controlling curve accordingly of pump 2.Thereby, it is possible to reduce the corresponding to pipe resistance of surplus
Boosting and seek the energy-saving of water supply device 1, and be able to suppress the insufficient water from water supply device 1.
(the 2nd embodiment)
Figure 10 is the signal for indicating an example of pump installation and Long-Range Surveillance Unit of an embodiment of the invention
Figure.The Long-Range Surveillance Unit 60 of present embodiment is communicated by common line 90 with water supply device 1.Common line 90 is
Analog of telephone line road network, isdn line road network, optical network, Wireless LAN, PHS line network, cell phone lines net, internet etc. are arbitrary
Communication mode.Common line 90 is also possible to any combination of these multiple communication modes.Here, in structure shown in Fig. 10
Water supply device 1 is in addition to control unit 40 has the aspect of communication unit 52 for communication with the outside, with the shown in Fig. 3 1st
The water supply device 1 of embodiment is identical.In addition, common line 90 is not limited to wired mode, it is also possible to wireless mode.Separately
Outside, it also can replace common line 90 or use the special circuit for connecting water supply device 1 and common line 90 on this basis.
As shown in Figure 10, Long-Range Surveillance Unit 60 has storage unit 67, operational part 68, the portion I/O 70, configuration part 66, display
Portion 69 and communication unit 72.Configuration part 66 and display unit 69 are mounted on the operating panel 71 of Long-Range Surveillance Unit 60.In addition, long-range
Each function of monitoring arrangement 60 can also dispersedly configure in more than two devices.
Long-Range Surveillance Unit 60 is configured to the control unit 40 from communication unit 72 to water supply device 1 and sends director data.
The communication unit 52 of control unit 40 receives the order data from Long-Range Surveillance Unit 60, and by the order data from TCP/IP network
The data that data conversion can be identified at operational part 48.Control unit 40 controls the operating of pump 2 in accordance with director data, or will be by
It is required that operation information to Long-Range Surveillance Unit 60 send.The data transmission carried out from control unit 40 to Long-Range Surveillance Unit 60 can
To carry out always, it can also carry out, can also be being wanted from Long-Range Surveillance Unit 60 every defined period (such as several days etc.)
It is carried out in the case where asking.
According to this structure, Long-Range Surveillance Unit 60 can obtain the revolving speed Nm and target pressure of the motor 3 of water supply device 1
Power PN.In addition, Long-Range Surveillance Unit 60 can also receive the data other than revolving speed Nm and goal pressure PN from water supply device 1.Example
Such as, Long-Range Surveillance Unit 60 can receive the current goal pressure controlling curve C of water supply device 1, also can receive and is stored in
The various data of the setting values such as PA, PB in storage unit 47.Moreover, Long-Range Surveillance Unit 60 can also receive water supply device 1
Exception information.
In addition, Long-Range Surveillance Unit 60 can in order to obtain water supply device 1 motor 3 revolving speed Nm and goal pressure PN,
And goal pressure controlling curve C is corrected based on the data got and sends and instructs to the control unit of water supply device 1 40.At this
In the case of, Long-Range Surveillance Unit 60 executes controlling curve setting processing shown in fig. 5 as escribed above, and in order to correct target pressure
Power controlling curve C and to the control unit of water supply device 1 40 send instruct.The instruction transmission carried out to control unit 40 is also possible to only
It is sent so that PA, PB are adapted to high lift side or low lift side for instruction.In addition, Long-Range Surveillance Unit 60 can also determine newly
Goal pressure controlling curve C ' and by goal pressure controlling curve C ' to control unit 40 send.
According to the present embodiment, it can be automatically determined by Long-Range Surveillance Unit 60 by remotely operating and water supply device
1 operational situation most suitable goal pressure controlling curve accordingly.Especially obtains and monitor in remote field having had
In the case where the device of the operational situation of water supply device 1 etc., by making the Long-Range Surveillance Unit 60 execute control for example shown in fig. 5
Koji-making line setting processing, and the goal pressure controlling curve of water supply device 1 can be corrected using existing equipment.In addition,
In this case, by making the Long-Range Surveillance Unit for monitoring multiple water supply devices 60 be modified the place of goal pressure controlling curve
Reason, and compared with the case where making existing each water supply device 1 be modified the processing of goal pressure controlling curve, it can reduce
Import the object of processing.
In addition, as shown in Figure 10, Long-Range Surveillance Unit 60 also can be communicated and be all together with other water supply device 1A
Ground stores multiple water supply devices 1, the data of 1A are managed.It as a result, also can be according to each region, time (in one day
Time-bands, season etc.), the structure (resident's number, the number of plies, direction etc.) of building carry out the data referring to water supply device.It also can be with
Determine that rotary speed threshold value Nr1, pressure threshold Ps, the correction value of goal pressure controlling curve C are equivalent based on these data.
It is in Long-Range Surveillance Unit 60, communicated with water supply device 1 and receive motor 3 in addition, in the present embodiment
Revolving speed Nm and goal pressure PN communication unit 72 and " revolving speed receiving unit " and " pressure receiving unit " it is suitable.In addition, output is based on
Revolving speed Nm and goal pressure PN is come operational part 68 of instruction for correcting goal pressure controlling curve C etc. and by the finger of operational part 68
Enable the communication unit 72 sent to the control unit 40 of water supply device 1 and " revision directive transmission unit " suitable.
(the 3rd embodiment)
Figure 11 is to indicate that another example of the pump installation and Long-Range Surveillance Unit of an embodiment of the invention shows
It is intended to.The structure of present embodiment, which is removed, not to be had communication unit 52 instead of the control unit 40 of water supply device 1 and is arranged water supply device 1
It is identical as structure shown in Fig. 10 other than the aspect of the communication device 80 of the communications intermediary of Long-Range Surveillance Unit 60.
Communication device 80 is arranged in place identical with water supply device 1, to water supply device 1 and Long-Range Surveillance Unit 60
Communication carries out intermediary.The portion I/O 50 of communication device 80 and control unit 40 carries out signal transmitting and receiving.Communication device 80 and the portion I/O
50 are connected with each other for example, by communications such as wired communication mode such as RS422,232C, 485 or infrared communications.
Communication device 80 has communication unit and protocol converter (not shown).The communication unit of communication device 80 is configured to fixed intervals
(such as every 250ms) obtains the operation information and fault message of water supply device 1 from control unit 40.The protocol conversion of communication device 80
Device is used to the various information (data) got from control unit 40 being converted into TCP/IP network data.Pass through the protocol conversion
Device, and the data between Long-Range Surveillance Unit 60 and control unit 40 are carried out by the common lines such as NTT route or internet 90
Transmitting and receiving.
In the present embodiment, the operational situation with water supply device 1 can be also automatically determined by Long-Range Surveillance Unit 60
Corresponding most suitable goal pressure controlling curve, and carry out via communication device 80 the goal pressure control of water supply device 1
The amendment of curve.I.e. it is capable to play effect identical with the structure of the 2nd embodiment.Additionally, there are because of common line
90 technological innovation and must not be without the change of agreement between communication device 80 and common line 90 etc. the case where.In the feelings
Under condition, as long as by the way that communication device 80 and water supply device 1 are separated, so that it may not stop the water supply as lifeline and only change
Communication device 80.
It this concludes the description of embodiments of the present invention, but the embodiment of above-mentioned invention is to be easy the present invention
Understand, does not limit the present invention.The present invention is changed, is improved in which can not depart from the purport, and in the present invention certainly
It also include its equipollent.In addition, in at least part of range for being able to solve above-mentioned technical task, or have effect
In at least part of range, it is able to carry out any combination of embodiment and variation, claims is able to carry out and says
Any combination of each structural element documented by bright book is omitted.
Claims (7)
1. a kind of pump installation comprising:
Pump transfers liquid；
Motor drives the pump；With
Control unit is set in a manner of making the discharge lateral pressure of the pump become the goal pressure on goal pressure controlling curve
The revolving speed of the motor simultaneously controls the motor,
The average value of the revolving speed of the motor of the control unit within the 1st stipulated time is smaller than defined rotary speed threshold value and the 2nd
The average value of the goal pressure in stipulated time is than the defined pressure threshold hour on the goal pressure controlling curve
Correct the goal pressure controlling curve in a manner of reducing the goal pressure, within the 1st stipulated time described in
Institute is corrected in a manner of increasing the goal pressure when average value of the revolving speed of motor is more than the defined rotary speed threshold value
State goal pressure controlling curve.
2. pump installation as described in claim 1, which is characterized in that
Rotary speed threshold value as defined in described is the rated speed of the motor.
3. pump installation as described in claim 1, which is characterized in that
Pressure threshold as defined in described is the median of the goal pressure on the goal pressure controlling curve.
4. pump installation as claimed in claim 2, which is characterized in that
Pressure threshold as defined in described is the median of the goal pressure on the goal pressure controlling curve.
5. pump installation according to any one of claims 1 to 4, which is characterized in that
The control unit the goal pressure average value than pressure as defined in described on the goal pressure controlling curve
Threshold value hour corrects the goal pressure controlling curve in a manner of making the goal pressure only reduce the 1st pressure, at described turn
The average value of speed be it is described as defined in it is more than rotary speed threshold value when so that the goal pressure only increase it is bigger than the 1st pressure by the
The mode of 2 pressure corrects the goal pressure controlling curve.
6. a kind of Long-Range Surveillance Unit, is communicated with pump installation, wherein the pump installation has the pump of transfer liquid, driving institute
It states the motor of pump and is controlled in a manner of making the discharge lateral pressure of the pump become the goal pressure on goal pressure controlling curve
The control unit of the motor, the Long-Range Surveillance Unit are characterized in that, comprising:
Revolving speed receiving unit receives the revolving speed of the motor；
Pressure receiving unit receives the goal pressure of the pump；With
Revision directive transmission unit, the average value of the revolving speed of the motor within the 1st stipulated time is than defined rotary speed threshold value
The average value of the received goal pressure in small and the 2nd stipulated time is than as defined on the goal pressure controlling curve
Pressure threshold hour will correct the instruction of the goal pressure controlling curve to described in a manner of reducing the goal pressure
Control unit is sent, and the average value of the revolving speed of the received motor within the 1st stipulated time is the defined revolving speed
When more than threshold value, the instruction of the goal pressure controlling curve will be corrected in a manner of increasing the goal pressure to the control
Portion processed is sent.
7. a kind of control method of pump installation, wherein the pump installation has the pump of transfer liquid and the motor of the driving pump,
And the motor, institute are controlled in a manner of making the discharge lateral pressure of the pump become the goal pressure on goal pressure controlling curve
The control method for stating pump installation is characterized in that,
The revolving speed of the motor is obtained,
The goal pressure of the pump is obtained,
Average value in the revolving speed of the motor in the 1st stipulated time is smaller than defined rotary speed threshold value and in the 2nd stipulated time
The goal pressure got average value than the defined pressure threshold hour on the goal pressure controlling curve with
The mode for reducing the goal pressure corrects the goal pressure controlling curve, getting within the 1st stipulated time
The revolving speed average value to be more than rotary speed threshold value as defined in described when correct institute in a manner of increasing the goal pressure
State goal pressure controlling curve.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015100331A JP6469520B2 (en) | 2015-05-15 | 2015-05-15 | Pump device, remote control device, and control method of pump device |
| JP2015-100331 | 2015-05-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106150998A CN106150998A (en) | 2016-11-23 |
| CN106150998B true CN106150998B (en) | 2019-09-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610320258.9A Active CN106150998B (en) | 2015-05-15 | 2016-05-13 | The control method of pump installation, Long-Range Surveillance Unit and pump installation |
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| Country | Link |
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| JP (1) | JP6469520B2 (en) |
| CN (1) | CN106150998B (en) |
| MY (1) | MY185874A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110857687B (en) * | 2018-08-24 | 2022-05-13 | 恩格尔机械(上海)有限公司 | Method and device for monitoring the condition of a hydraulic pump |
| JP6759392B2 (en) * | 2019-02-25 | 2020-09-23 | 株式会社川本製作所 | Water supply device |
| CN112012837B (en) * | 2020-09-04 | 2023-10-31 | 上海华兴数字科技有限公司 | Control method, main controller, system and electronic equipment for water intake of fire truck |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2523139B2 (en) * | 1987-09-18 | 1996-08-07 | 株式会社日立製作所 | Water supply system using variable speed pump |
| JPH0295786A (en) * | 1988-10-03 | 1990-04-06 | Hitachi Ltd | Signal transmission device for feedwater supply system |
| JP3851783B2 (en) * | 2001-03-08 | 2006-11-29 | 株式会社東芝 | Terminal pressure control support device |
| JP4317093B2 (en) * | 2004-07-26 | 2009-08-19 | 株式会社荏原製作所 | Fire pump device |
| JP4938304B2 (en) * | 2005-12-22 | 2012-05-23 | 株式会社荏原製作所 | Pump control method and water supply device |
| CN101556068A (en) * | 2008-04-11 | 2009-10-14 | 上海瀚艺冷冻机械有限公司 | Constant pressure frequency conversion energy-saving control method of recycle pump in central air-conditioning system |
| JP2012112363A (en) * | 2010-11-29 | 2012-06-14 | Hitachi Industrial Equipment Systems Co Ltd | Water supply device |
| US8700221B2 (en) * | 2010-12-30 | 2014-04-15 | Fluid Handling Llc | Method and apparatus for pump control using varying equivalent system characteristic curve, AKA an adaptive control curve |
| JP5416729B2 (en) * | 2011-03-22 | 2014-02-12 | 株式会社日立製作所 | Water central monitoring and control device, water monitoring control system and water monitoring control program |
| JP5747622B2 (en) * | 2011-04-11 | 2015-07-15 | 富士電機株式会社 | Water supply pump controller |
| JP6184792B2 (en) * | 2013-07-26 | 2017-08-23 | 株式会社荏原製作所 | Water supply equipment |
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| JP6469520B2 (en) | 2019-02-13 |
| MY185874A (en) | 2021-06-14 |
| CN106150998A (en) | 2016-11-23 |
| JP2016217195A (en) | 2016-12-22 |
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