CN103299076B - Method for operating a pump that is driven by an electric motor in a power-optimized manner in the event of low volumetric flow rates - Google Patents
Method for operating a pump that is driven by an electric motor in a power-optimized manner in the event of low volumetric flow rates Download PDFInfo
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- CN103299076B CN103299076B CN201280004962.3A CN201280004962A CN103299076B CN 103299076 B CN103299076 B CN 103299076B CN 201280004962 A CN201280004962 A CN 201280004962A CN 103299076 B CN103299076 B CN 103299076B
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- characteristic curve
- volume flowrate
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Classifications
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- 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
- F04B49/20—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 by changing the driving speed
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- 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
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- 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
- F04B49/06—Control using electricity
- F04B49/065—Control using electricity and making use of computers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
- F04C14/08—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the rotational speed
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- 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
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- 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
- F04B2203/00—Motor parameters
- F04B2203/02—Motor parameters of rotating electric motors
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- 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
- F04B2205/09—Flow through the pump
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- 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
- F04B2207/00—External parameters
- F04B2207/04—Settings
- F04B2207/041—Settings of flow
- F04B2207/0411—Settings of flow maximum
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- 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
- F04B2207/00—External parameters
- F04B2207/04—Settings
- F04B2207/041—Settings of flow
- F04B2207/0412—Settings of flow minimum
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
Abstract
The invention relates to a method for operating a pump that is driven by an electric motor in a hydraulic system in a power-optimized manner in the event of very low volumetric flow rates (Q). The target delivery head (H) of the pump is regulated along a preset characteristic curve (K) dependent on the volumetric flow rate (Q). The target delivery head (H) is reduced compared to the preset characteristic curve (K) if the volumetric flow rate (Q) falls short of a reference value (Q_ref) that is maximally a tenth of the maximum volumetric flow rate (Q_max) on the characteristic curve (K). The reduction is carried out as long as the volumetric flow rate lies below the volumetric flow rate reference value (Q_ref) and a delivery head minimum value (H_min) has not been reached. The invention further relates to a pump that is driven by an electric motor, comprising a control and regulating electronic system that is equipped to carry out the method.
Description
Technical field
The present invention relates to a kind of method for running the pump of motorized motions when low-down volume flowrate in hydraulic system power optimization, wherein, regulating the rated head of pump along characteristic curve according to volume flowrate.In addition, the present invention relates to a kind of pump of motorized motions with controlling and regulate electronic equipment, described control and regulate electronic device design be according to method of the present invention for realization.Finally, the present invention relates to a kind of computer program had for performing the instruction according to method of the present invention, when performing described method in the control and adjustment electronic equipment of pump.
Background technique
Pump is known along the characteristic adjustment preset.Apply so-called Δ p-c characteristic curve in this case, in this characteristic curve, the rated head of pump in volume flowrate remains unchanged.In addition, so-called Δ p-v characteristic curve is known, and wherein, the adjustment of described pump is carried out according to the linear relationship of rated head and volume flowrate.Δ p-v characteristic curve matches according to the volume flowrate demand of hydraulic system and the hydraulic power of pump.
When this kind of characteristic curve regulates disadvantageously, when the rated head valve in systems in which of pump is closed, in the null situation of volume flowrate, the hydraulic pressure demand of the reality of equipment is not that is matched.Or rather, regulating characteristic curve be defined for be greater than zero volume flowrate and only can be applied in there.If observe the regulating characteristic curve in H/Q plotted curve in addition, so at the H axis geometry overtime of regulating characteristic curve towards plotted curve, there is the intersection point with above-mentioned axis, described intersection point causes rated head relatively high for pump in the null situation of volume flowrate.Therefore described pump is towards valve closed in a device conveying, thus unnecessarily consumed power.
Summary of the invention
Therefore the object of the invention is, a kind of method of the pump for running motorized motions in hydraulic system is provided, make can realize the power optimization of pump in the low-down situation of the volume flowrate of pump, energy-efficient operation.
Described object is achieved according to the present invention by the method with following feature, in order to run the pump of motorized motions in hydraulic system in the low-down situation of volume flowrate power optimization, wherein, according to volume flowrate along the characteristic curve preset to regulate rated head, propose, when volume flowrate is lower than reference value, rated head reduces relative to the characteristic curve preset, described reference value is 1/10th of the maximum volume flow on characteristic curve to the maximum, be preferably 1/20th of described maximum value, wherein, as long as volume flowrate lower than volume flowrate reference value and lift minimum value also do not reach, then carry out described reduction.
Basic thought according to method of the present invention is, the reduction of the rated head of pump is carried out when low-down volume flowrate, that is, the adjustment on the regulating characteristic curve originally preset is departed from described low volume flowrate, and replace in this, control the output power that ground reduces pump aptly, wherein, the characteristic curve of subordinate regulates and can remain valid.The lift rating value that the reduction of the rated head of pump directly can be preset by being reduced to pump carries out.This such as can be undertaken by the rotating speed of reduction pump or electric drive power.In this case, be that pump motor directly presets the rated head determined by apparatus for controlling pump.As an alternative, can by reducing to determine that characteristic characteristic curve rated head reduces the rated head of pump.Described characteristic curve rated head provides the position of characteristic curve in pump curve race.Such as, preset property curve rated head can be carried out by characteristic curve and the intersection point of the curve describing maximum (top) speed.This means, according to the present invention, the reduction of the rated head of pump also can realize as follows, namely lower than during volume flowrate reference value by preset characteristic position move down.Be that pump motor directly presets the rated head determined by the control gear of pump in this case, wherein, directly regulate from the characteristic curve of subordinate for lift of pump rating value.
At this, core views of the present invention is, when volume flowrate equals zero, so carries out pump power reduction, because originally do not need the output power of pump in this case.If but pump disconnects completely, so system no longer can be observed and no longer can be made a response to the volume flowrate demand changed.In addition, due to the measurement inaccuracy when determining volume flowrate and the casual leakage due to the valve place in hydraulic system, desirably, not only consider the null runnability of volume flowrate, but say more definitely and will limit decline region, perform according to method of the present invention in described decline region.
Described decline region is upwards defined by volume flowrate reference value, and described volume flowrate reference value is 1/10th of maximum volume flow to the maximum, and described maximum volume flow can reach on the regulating characteristic curve preset.Preferably also can apply less volume flowrate reference value, such as, the twentieth reference value of maximum volume flow for being limited by characteristic curve.By determining volume flowrate reference value, lift is not only at Q=0l/h but also at 0<Q<=Q
refcertain volume flowrate region in reduce.Described region is called decline region below.Reference value is preferably between 10l/h to 250l/h.Because the typical designing quality flow of heating unit is between 30l/h to 50l/h, guarantee fully to run in small systems an independent thermal cycle by reference value for the lower limit of about 10l/h.In larger system, the larger limiting value of reference value is significant, because run the higher minimum operation causing about 250l/h while multiple customer, that is higher lowest volume flow guaranteeing the minimum power supply being in operating customer simultaneously.
If be reduced to the value lower than reference value by the volume flowrate that hydraulic system needs, so according to the present invention, the rated head of pump reduces.As long as this volume flowrate lower than reference value and lift minimum value does not also reach time just carry out.The rating value that the characteristic curve that can reduce subordinate in decline region regulates or the rotating speed directly reducing pump.In the case of the latter, described pump runs in the mode of pure control.
Lift minimum value is distributed, so that volume flowrate can flow through in systems in which generally according to the pressure difference that the valve place in hydraulic system needs.This want it is considered that, can application of weight break (Schwerkraftbremse) in hydraulic system, especially backflow preventer, described gravity brake needs certain cracking pressure, so that media flow.When exceeding described cracking pressure, gravity brake can allow corresponding volume flowrate.Therefore advantageously, lift minimum value is made must to be at least how high for foundation with lift of pump, to reach the cracking pressure of the valve in hydraulic system.Such as, according to structural type, especially the applied backflow preventer of equipment, lift minimum value is between 60cm to 200cm.
The restriction of this kind of lift minimum value is required, can keep observing the volume flowrate in hydraulic system.Because when lift of pump is lower than described minimum value, so can not reach the cracking pressure of valve in systems in which and not have volume flowrate to flow through based on principle due to flowed friction, therefore can not determine when pump runs so whether or when the modulating valve of system is opened.If described system is such as consisted of heating plant, so the change of the manipulation of pump can not be caused, because the unlatching of described valve remains unrecognized by open valve, such as unlatching thermostat valve.When system is the air-conditioning system for cooling, then there is identical situation.
If described rated head higher than lift minimum value, then ensure that, the unlatching of at least one valve in systems in which can cause described volume flowrate correspondingly to increase and again be elevated on volume flowrate reference value.So according to the present invention, when volume flowrate is increased to or be increased on volume flowrate reference value, rated head again can improve and be transitioned into along in characteristic adjustment.Therefore, outside decline region, the rated head of pump improves again, improves until reach original regulating characteristic curve especially continuously.
Pump along its characteristic curve be conditioned can be pure Δ p-c characteristic curve, pure Δ p-v characteristic curve can be maybe such as according to the time dependent Δ p-c of temperature or Δ p-v characteristic curve.That is, characteristic curve can be described in linear, secondary or the constant association between volume flowrate and lift and/or can be variable in time.
The decline of rated head can be carried out with constant rate of descent in continuous print runs.After decline, the raising of rated head also can be carried out with constant ramp-up rate in continuous print runs.Rate of descent and the ramp-up rate of preferred lift rating value can be chosen as different.At this particularly advantageously, rate of descent is set to be less than ramp-up rate.When the volume flowrate demand raised, described volume flowrate demand can be supplied to as quickly as possible.
If volume flowrate is lower than reference value, so rated head declines gradually.This is not preferably undertaken by switching but carries out continuously, thus there will not be nonlinear effect in hydraulic system, especially carries the interruption of stream.
Decline and preferably carry out with constant rate of descent.This means, the time that the operating point of system is arranged in the decline region of characterisitic family is longer, and rated head just declines more.Operating point moves down, until lift minimum is after a certain time reached to graphical illustration in H/Q plotted curve on correspondingly current piping network parabola (Rohrnetzparabel).
In a kind of favourable improvement project of method according to the present invention, after reaching lift minimum value, control described pump in the mode of clock pulse.At this, alternately switch between the first lift value and the second lift value lower than the first lift value.By switching between the first and second lift values, be adjusted to the lift value lower than the first lift value fifty-fifty.
Switching between two lift values is preferably carried out with uniform clock pulse.At this, pump is running as in the first lift value of rating value in first time period.And within the endurance of the second time period, in pump, be adjusted to the second lift value.
Second lift value preferably can equal lift value zero.This means, pump disconnects within the endurance of the second time period.In this case, realize the temporary transient disconnection (null value clock pulse section) of pump from the first lift value or periodically connect, but therefore achieving discontinuous energy-optimised operation.Alternative is in this, and the second lift value can be the arbitrary lift value between lift minimum value and value zero.
Periodically disconnect pump and have following advantage, namely can realize maximum energy saving in pump.On the other hand, the second lift value on the height higher than lift zero has following advantage, and namely ensure that provides enough pressure to drive volume flowrate in whole piping network (Rohrnetz).Therefore, even if when also can be fully observed lower than described system when lift minimum value.Because when the first lift value and higher than lift value zero the second lift value between clock pulse can prevent, the mass flow rate in each parts of system due to low-down pressure and possible nonlinear effect, to stream the closed of (thermischer Umtrieb) or the flap in gravity brake as heat and interrupt.
Alternative is in the second lift value determined, described second lift value also can be variable.Therefore, according to the present invention, after reaching lift minimum value, lift of pump preferably can decline as follows further fifty-fifty, namely described pump as between the lift minimum value of the first lift value and the second lift value by clock pulse, wherein, the second lift value reduces gradually.
Particularly advantageously, lift minimum value is used as the first lift value, because pump is from the disconnection of described minimum delivery value or be switched to the second lift value from described minimum lift value and cause minimum noise level.Otherwise, may feel owing to being switched on or switched off or switching the noise of generation and the corresponding complaint of ultimate consumer may be caused.
Within the endurance of the second time period, that is when described pump is with the second lift value operation or disconnection, hydraulic system can not reliably be observed.This means, the volume flowrate information that system is relevant can not be obtained.To be switched to by pump in lift minimum value again or to be switched in described value by pump and ensure that, described system becomes again observable and the volume flowrate demand raised can be determined.Therefore advantageously, at least check during with the time period of the first lift value process pump, whether volume flowrate is increased to or has been increased on volume flowrate reference value.
If determine described volume flowrate in the inspection of volume flowrate to be increased to or to be increased on volume flowrate reference value, so rated head again improves and is transitioned into along in characteristic adjustment.Preferably proceed to along the continuous print of characteristic adjustment, that is stepless transition at this, to match with the actual demand of equipment with making power smooth.
Preferably switch with uniform clock pulse between the first lift value and the second lift value, wherein, described pump runs with the second lift value or disconnects within the time period of 10 seconds to 120 seconds.
Reducing by activating lift, compared with the disconnection enduringly of pump, in hydraulic system, always having a small amount of liquid to be transferred, described liquid especially hot water.Therefore, there is following state when the normal operation of recovery, can be transitioned into continuously from described state along in characteristic normal normal operation.
By the rated head of pump being reduced and being periodically switched to minimum lift value downwards, especially temporarily described pump is disconnected, system keeps on the one hand can be observed and remain in following state, in a state in which, the water temperature that the controlling mechanism of hydraulic system can automatically such as be improved being prepared by potable water is made a response.Compensated early by dropping in lift minimum value by the more power in the water temperature drawing-in system of raising.
In addition propose a kind of pump with the electric operation controlling and regulate electronic equipment, described control and adjustment electronic device design are used for realizing according to method of the present invention.Finally, a kind of computer program had for performing the instruction according to method of the present invention is proposed, when realizing described method in the control and adjustment electronic equipment of pump.
Accompanying drawing explanation
Other advantage, the characteristic sum characteristic according to method of the present invention is set forth below by means of accompanying drawing.Shown in accompanying drawing:
The H/Q plotted curve in the decline region when rated head reduces that Fig. 1 has Δ p-v characteristic curve and marks;
Fig. 2 is from decline region to the H/Q plotted curve of the characteristic transition of Δ p-v;
The continuous print of Fig. 3 pump runs to the view of the transition of the operation of clock pulse, and wherein, the second lift value reduces gradually.
Embodiment
Fig. 1 illustrates the H/Q plotted curve 1 of the hydraulic system of the pump with motorized motions, and described hydraulic system is here heating plant.Reference character 2 marks the operating point be positioned on characteristic curve under the maximum (top) speed of pump.Described pump regulates on Δ p-v characteristic curve K when normal operation, according to described characteristic curve, with the volume flowrate demand Q of system linear regulate rated head H.Under the maximum (top) speed of pump, characteristic curve K obtains maximum volume flow Q _ max.At this moment rated head H H_soll marks and equals characteristic curve rated head.
If the operating point of heating plant moves along characteristic curve K towards the direction of less volume flow Q, and volume flow Q reaches reference value Q_ref, described reference value is about 5% of maximum volume flow Q _ ref, and be such as 150l/h, then the rated head H of pump declines relative to characteristic curve K.So operating point moves in Fig. 1 and adds in the decline region 3 of shade.As long as volume flow Q lower than volume flowrate reference value Q_ref and lift minimum value H_min does not also reach time, just carry out described decline.
Lift minimum value H_min is assigned as, and makes when being in this lift minimum value, just in time overcomes the cracking pressure being present in valve in heating system and gravity brake, that is, when thermostat valve is opened, can there is volume flowrate.Minimum lift H_min typically such as is about 70cm in for single household to the pump of two-family house, and is about 1m in the pump for larger building.
When lower than volume flowrate reference value Q_ref, the operating point of heating system continues to move towards the direction of less volume flow Q, until arrive minimum lift value H_min along the piping network parabola do not drawn by the decline of rated head H.Carry out described decline with constant rate of descent continuously, to such an extent as to the time that operating point is stayed in decline region 3 is longer, rated head H just declines more.
Decline have following advantage unlike minimum lift H_min in continuous print runs, namely heating system keeps can being observed, because always can there is at least minimum volume flow Q when valve not exclusively cuts out more.Rate of descent can be such as 10U/min per minute.
If described rated head H drops to, make to reach lift minimum value H_min, the manipulation of the clock pulse of Heating Cyclic pump is so transitioned into according to the present invention, that is, be transitioned into discontinuous operation, wherein, alternately switch between lift minimum value H_min and the second lift value lower than it.
According to clock pulse ratio, i.e. on the one hand lift minimum value H_min and the lasting duration that exists of the second lift value on the other hand, any lift value H between lift minimum value H_min and described the second lower lift value can be adjusted to fifty-fifty.In relatively slow heating system, such as floor heating device, also can carry out the disconnection of pump within the second time period.At this, when at least when checking whether volume flow Q is increased to or has been increased on volume flowrate reference value Q_ref with lift minimum value H_min run duration, also to remain when temporarily disconnecting pump when heating system both switches between lift minimum value H_min and the lift value lower than it and can be observed.
As shown in Figure 2, in this case, rated head H improves continuously, is wherein transitioned into along in the adjustment of characteristic curve K.At this, ramp-up rate is chosen as and is greater than rate of descent, the power of pump is matched with required volume flow Q rapidly.
Fig. 3 illustrates that the pump with the second lift value reduced gradually runs to the transition in time of the operation of clock pulse from continuous print.When time point t=0, supposition reaches volume flowrate reference value Q_ref.Subsequently, lift of pump H is reduced on lift minimum value H_min continuously.If reach lift minimum value H_min at time point t1, to be so transitioned in discontinuous operation and to convert to clock pulse between the first lift value and the second lift value, that is, periodically switching.At this, switching time is chosen as identical.
The lift minimum value H_min reached before first lift value equals.Second lift value is lower than described lift minimum value and reduce gradually, until reach the second lift minimum value H_min2.In the example of such as Fig. 3, as long as also do not reach the second lift minimum value, so in each new clock pulse, the second lift value reduces.As an alternative, the second lift value determined also can be kept in multiple clock pulse.Have following advantage according to the embodiment of Fig. 3, namely hydraulic system always remains and can be observed, and no matter whether backflow preventer is present in system.
Claims (18)
1. in hydraulic system when low-down volume flowrate (Q) power optimization ground run the method for the pump of motorized motions, wherein, regulate the rated head (H) of described pump along the characteristic curve preset (K) according to volume flowrate (Q), it is characterized in that, when described volume flowrate (Q) is lower than reference value (Q_ref), described rated head (H) declines relative to the described characteristic curve (K) preset, described reference value is 1/10th of the maximum volume flow (Q_max) on described characteristic curve (K) to the maximum, wherein, as long as described volume flowrate (Q) lower than described volume flowrate reference value (Q_ref) and lift minimum value (H_min) does not also reach time, just carry out described decline.
2. the method for claim 1, is characterized in that, described reference value is 1/20th of the maximum volume flow (Q_max) on described characteristic curve (K) to the maximum.
3. the method for claim 1, is characterized in that, described decline is carried out continuously.
4. the method for claim 1, is characterized in that, described decline is carried out with constant rate of descent.
5. method as claimed in claim 3, it is characterized in that, described decline is carried out with constant rate of descent.
6. the method as described in one of claim 1 to 5, is characterized in that, after reaching described lift minimum value, controls described pump in the mode of clock pulse, wherein, alternately switches between the first lift value and the second lift value lower than described first lift value.
7. method as claimed in claim 6, it is characterized in that, described first lift value equals described lift minimum value (H_min).
8. method as claimed in claim 6, it is characterized in that, described second lift value is zero.
9. method as claimed in claim 6, it is characterized in that, described second lift value is reduced gradually.
10. method as claimed in claim 6, it is characterized in that, during running the time period of described pump by described first lift value, at least check whether described volume flowrate (Q) is increased to or has been increased on described volume flowrate reference value (Q_reg).
11. methods as claimed in claim 6, it is characterized in that, switch with uniform clock pulse between described first lift value and described second lift value, wherein, being in the time period between 10 seconds to 120 seconds with described second lift value to run described pump.
12. methods as described in one of claim 1 to 5, it is characterized in that, when described volume flowrate (Q) is increased to or has been increased on described volume flowrate reference value (Q_reg), described rated head (H) again raises and is transitioned into and regulates along described characteristic curve (K).
13. methods as claimed in claim 12, is characterized in that, carry out the rising of described rated head (H) continuously.
14. methods as claimed in claim 12, it is characterized in that, ramp-up rate is greater than rate of descent.
15. methods as described in one of claim 1 to 5, it is characterized in that, described characteristic curve (K) is variable in time.
16. methods as described in one of claim 1 to 5, it is characterized in that, described method is for controlling Heating Cyclic pump.
17. methods as described in one of claim 1 to 5, it is characterized in that, the descending through of the described rated head of described pump is reduced to lift rating value that described pump directly presets or determines described characteristic characteristic curve rated head by reduction and realize.
18. with the pump of electric operation controlling and regulate electronic equipment, described control and regulate electronic device design for implementing according to the method one of claim 1 to 17 Suo Shu.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE201110008165 DE102011008165A1 (en) | 2011-01-10 | 2011-01-10 | Procedures for the performance-optimized operation of an electric motor-driven pump at low flow rates |
| DE102011008165.8 | 2011-01-10 | ||
| PCT/EP2012/000001 WO2012095274A2 (en) | 2011-01-10 | 2012-01-02 | Method for operating a pump that is driven by an electric motor in a power-optimized manner in the event of low volumetric flow rates |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103299076A CN103299076A (en) | 2013-09-11 |
| CN103299076B true CN103299076B (en) | 2015-04-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280004962.3A Active CN103299076B (en) | 2011-01-10 | 2012-01-02 | Method for operating a pump that is driven by an electric motor in a power-optimized manner in the event of low volumetric flow rates |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2663774B1 (en) |
| CN (1) | CN103299076B (en) |
| DE (1) | DE102011008165A1 (en) |
| RU (1) | RU2553630C2 (en) |
| WO (1) | WO2012095274A2 (en) |
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| DE102013204607A1 (en) | 2013-03-15 | 2014-09-18 | Thomas Stahl | Control of a volumetric flow for pumps with low volume flows |
| DE102013109134A1 (en) | 2013-08-23 | 2015-02-26 | Xylem Ip Holdings Llc | Method for determining a flow rate at a liquid delivery system, method for determining an amount of energy of a pumped liquid, liquid delivery system and pump |
| EP3058284B1 (en) | 2013-10-14 | 2019-03-20 | Grundfos Holding A/S | Control of a pump to optimize heat transfer |
| DE102014106359A1 (en) * | 2014-05-07 | 2015-11-12 | Xylem Ip Holdings Llc | Method for operating a pumping liquid conveying pump, feed pump, fresh water module and solar system |
| CN104235014B (en) * | 2014-08-28 | 2016-08-24 | 北京动力机械研究所 | The method for adjusting rotation speed of electrodynamic pump and system |
| DE102014018020A1 (en) * | 2014-12-08 | 2016-06-09 | Wilo Se | Method for operating a centrifugal pump |
| DE102016008016A1 (en) * | 2016-07-04 | 2018-01-04 | Wilo Se | Method and system for controlling a pump station |
| DE102017203474A1 (en) * | 2017-03-03 | 2018-09-06 | KSB SE & Co. KGaA | Method for controlling a variable-speed circulating pump and circulating pump |
| DE102017002342A1 (en) | 2017-03-13 | 2018-09-13 | Wilo Se | Configuration procedure for a variable-speed centrifugal pump assembly and associated configuration wizard |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2012095274A3 (en) | 2013-05-02 |
| WO2012095274A2 (en) | 2012-07-19 |
| RU2553630C2 (en) | 2015-06-20 |
| RU2013137441A (en) | 2015-02-20 |
| EP2663774A2 (en) | 2013-11-20 |
| CN103299076A (en) | 2013-09-11 |
| EP2663774B1 (en) | 2016-03-30 |
| DE102011008165A1 (en) | 2012-07-12 |
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