CN103299076A - 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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- CN103299076A CN103299076A CN2012800049623A CN201280004962A CN103299076A CN 103299076 A CN103299076 A CN 103299076A CN 2012800049623 A CN2012800049623 A CN 2012800049623A CN 201280004962 A CN201280004962 A CN 201280004962A CN 103299076 A CN103299076 A CN 103299076A
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- pump
- lift
- value
- characteristic curve
- volume flowrate
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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
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- 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, preferably a twentieth 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 (Q) 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 said method, and to a computer program product with instructions for carrying out the method for operating a pump that is driven by an electric motor when said method is carried out in a control and regulating electronic system of the pump.
Description
Technical field
The present invention relates to a kind of under the situation of low-down volume flowrate in the method for the pump of hydraulic system power optimization ground operation motorized motions, wherein, regulate the rated head of pump along characteristic curve according to volume flowrate.In addition, the present invention relates to a kind of pump that has the motorized motions of control and adjusting electronic equipment, described control and adjusting electronic equipment are designed for realization the method according to this invention.At last, the present invention relates to a kind of computer program that has for the instruction of carrying out the method according to this invention, when in the control of pump with regulate when carrying out described method in the electronic equipment.
Background technique
Pump is known along default characteristic adjusting.Use so-called Δ p-c characteristic curve in this case, the rated head of pump on volume flowrate remains unchanged in this characteristic curve.In addition, so-called Δ p-v characteristic curve is known, and wherein, the adjusting of described pump is carried out according to the linear relationship of rated head and volume flowrate.Δ p-v characteristic curve is complementary according to the volume flowrate demand of hydraulic system and the hydraulic power of pump.
Under the situation of this class feature curve adjustment, disadvantageously, under the situation of the valve closure of the rated head of pump in system, that is to say the hydraulic pressure demand that under the null situation of volume flowrate, does not match the reality of equipment.Or rather, regulating characteristic curve is defined for greater than zero volume flowrate and only can be applied in the there.If observe the regulating characteristic curve in the H/Q plotted curve in addition, so at regulating characteristic curve how much overtimes of H axis towards plotted curve, the intersection point of existence and above-mentioned axis, described intersection point causes rated head high relatively for pump under the null situation of volume flowrate.Therefore described pump is carried towards valve closed in equipment, thus consumed power unnecessarily.
Summary of the invention
Therefore the objective of the invention is, provide a kind of for the method at the pump of hydraulic system operation motorized motions, make operation power optimization, energy-efficient that under the low-down situation of the volume flowrate of pump, can realize pump.
Described purpose is achieved by the method with the described feature of claim 1.Provide favourable improvement project of the present invention in the dependent claims.
According to the present invention, for in hydraulic system under the low-down situation of volume flowrate the pump of power optimization ground operation motorized motions, wherein, regulate rated head according to volume flowrate along predefined characteristic curve, propose, when volume flowrate is lower than reference value, rated head reduces with respect to predefined characteristic curve, described reference value is 1/10th of maximum volume flow on characteristic curve to the maximum, be preferably described peaked 1/20th, wherein, as long as volume flowrate is lower than the volume flowrate reference value and the lift minimum value does not also reach, then carry out described reduction.
The basic thought of the method according to this invention is, under the situation of low-down volume flowrate, carry out the reduction of the rated head of pump, that is to say, in the described low adjusting of volume flowrate disengaging on default originally regulating characteristic curve, and replace in this, control ground reduces the output power of pump aptly, and wherein, the characteristic curve of subordinate is regulated and can be remained valid.The reduction of the rated head of pump can be undertaken by being reduced to the direct default lift rating value of pump.This for example can be undertaken by rotating speed or the electric driving power that reduces pump.In this case, be that pump is directly preset the rated head of determining with motor by apparatus for controlling pump.As an alternative, can be 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 family.For example, can come preset property curve rated head by the intersection point of characteristic curve and the curve of describing maximum (top) speed.This means that according to the present invention, the reduction of the rated head of pump can followingly realize that also namely the characteristic position that will preset moves down when being lower than the volume flowrate reference value.Control gear by pump is that pump is directly preset the rated head of determining with motor in this case, wherein, is used for the lift of pump rating value and directly regulates from the characteristic curve of subordinate.
At this, core viewpoint of the present invention is when volume flowrate equals zero, to carry out pump power so and reduce, because do not need the output power of pump in this case originally.If yet pump disconnect fully, system no longer can observe and no longer can make a response to the volume flowrate demand that has changed so.In addition, because the measurement inaccuracy when determining volume flowrate and because in the casual leakage at the valve place of hydraulic system, suitable is, not only consider the null runnability of volume flowrate, but say more definitely and will limit the zone that descends, execution the method according to this invention in described declines zone.
Described decline zone is upwards defined by the 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 at predefined regulating characteristic curve.Preferably also can use smaller volume flow reference value, for example be the twentieth reference value by the maximum volume flow of characteristic curve restriction.By determining the volume flowrate reference value, lift is not only at Q=0l/h but also at 0＜Q＜=Q
RefCertain volume flowrate zone in reduce.Below described zone is called the zone that descends.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 independent thermal cycle of operation in little system by reference value for the lower limit of about 10l/h.In bigger system, the bigger limiting value of reference value is significant, because operation causes the higher minimum operation of about 250l/h in the time of a plurality of customer, that is to say that higher guaranteeing is in the lowest volume flow that the minimum of operating customer is powered simultaneously.
If the volume flowrate that is needed by hydraulic system is reduced to the value that is lower than reference value, so according to the present invention, the rated head of pump reduces.As long as this be lower than in volume flowrate just carries out when reference value and lift minimum value also do not reach.In the decline zone, can reduce the rating value that the characteristic curve of subordinate regulates or the rotating speed that directly reduces pump.Under latter event, described pump moves in the mode of pure control.
Pressure difference according to the valve place needs in hydraulic system is distributed the lift minimum value, so that volume flowrate can flow through in system generally.What this will consider be, can application of weight break (Schwerkraftbremse), especially backflow preventer in hydraulic system, described gravity brake needs certain cracking pressure, so that media flow.When surpassing described cracking pressure, gravity brake can allow corresponding volume flowrate.Therefore advantageously, making the lift minimum value must be that many height are foundation with lift of pump at least, in order to reach the cracking pressure of the valve in hydraulic system.For example, according to the structural type of equipment, especially applied backflow preventer, the lift minimum value is between 60cm to 200cm.
The restriction of this class lift minimum value is essential, in order to can keep observing the volume flowrate in hydraulic system.Because when lift of pump is lower than described minimum value, can not reach the cracking pressure of the valve in system so and because flowed friction does not have volume flowrate to flow through based on principle, therefore can not determine when pump moves so whether or when the modulating valve of system is opened.If it is described system for example constitutes by heating plant, so by open valve, for example open the change of controlling that thermostat valve can not cause pump, unrecognized because the unlatching of described valve remains.When system be for the cooling air-conditioning system the time, identical situation then takes place.
If described rated head is higher than the lift minimum value, guaranteed that then the unlatching of at least one valve in system can cause that described volume flowrate correspondingly increases and is elevated to again on the volume flowrate reference value.So according to the present invention, when volume flowrate was increased to or has been increased on the volume flowrate reference value, rated head can improve and carry out the transition in characteristic adjusting again.Therefore, outside the decline zone, the rated head of pump improves again, improves especially continuously until reaching original regulating characteristic curve.
Pump can be that pure Δ p-c characteristic curve, pure Δ p-v characteristic curve maybe can be for example according to the time dependent Δ p-c of temperature or Δ p-v characteristic curve along its characteristic curve that is conditioned.That is to say that characteristic curve can be described in linearity, secondary or constant related between volume flowrate and the lift and/or can be variable in time.
The decline of rated head can in servicely be carried out with constant rate of descent continuous.After descending, the raising of rated head also can in servicely be carried out with constant rising speed continuous.The rate of descent of preferred lift rating value can be chosen as different with rising speed.Particularly advantageous at this is that rate of descent is set to less than rising speed.Under the situation of the volume flowrate demand that raises, described volume flowrate demand can be supplied to as quickly as possible.
If volume flowrate is lower than reference value, rated head descends gradually so.This is not preferably undertaken by switching but carries out continuously, thereby nonlinear effect can not occur in hydraulic system, especially carries the interruption of stream.
Descend and preferably carry out with constant rate of descent.This means that it is more long that the operating point of system is arranged in time in decline zone of characterisitic family, rated head just descends more manyly.Operating point graphical illustration ground in the H/Q plotted curve moves down at correspondingly current piping network parabola (Rohrnetzparabel), is reached until lift minimum behind certain hour.
In a kind of favourable improvement project of the method according to this invention, after reaching the lift minimum value, control described pump in the mode of clock pulse.At this, in the first lift value be lower than between the second lift value of the first lift value and alternately switch.By between the first and second lift values, switching, be adjusted to fifty-fifty the lift value that is lower than the first lift value.
Switching between two lift values is preferably carried out with uniform clock pulse.At this, pump moves in the first lift value as rating value in very first time section.And in the endurance of second time period, in pump, be adjusted to the second lift value.
The second lift value preferably can equal lift value zero.This means that pump disconnects in the endurance of second time period.In this case, realize the temporary transient disconnection (null value clock pulse section) of pump or periodically connect, so realized discontinuous, still energy-optimised operation from the first lift value.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 in pump, can realize maximum energy saving.Relative therewith, the second lift value on the height that is higher than lift zero has following advantage, has namely guaranteed to provide enough pressure in whole pipe network (Rohrnetz) in order to drive volume flowrate.Therefore, even described system also can be fully observed under the situation that is lower than the lift minimum value.Because in the first lift value be higher than under the situation of the clock pulse between the second lift value of lift value zero and can prevent, the closure that the mass flow rate in each parts of system is streamed (thermischer Umtrieb) or the flap in gravity brake owing to low-down pressure and possible nonlinear effect, as heat is interrupted.
Alternative is in the second lift value of determining, the described second lift value also can be variable.Therefore, according to the present invention, after reaching the lift minimum value, lift of pump preferably can followingly further descend fifty-fifty, be described pump between as the lift minimum value of the first lift value and the second lift value by clock pulseization, wherein, the second lift value reduces gradually.
Particularly advantageously be, use the lift minimum value as the first lift value, because pump is from the disconnection of the delivery value of described minimum or switch to the second lift value from the lift value of described minimum and cause minimum noise level.Otherwise, may feel owing to being switched on or switched off or switching the noise of generation and may cause ultimate consumer's corresponding complaint.
In the endurance of second time period, that is to say that hydraulic system can not be observed reliably when described pump moves with the second lift value or disconnects.This means, can not the relevant volume flowrate information of acquisition system.Be switched to pump on the lift minimum value again or pump switched on the described value and guaranteed that described system becomes the volume flowrate demand that can observe and raise again and can be determined.Therefore advantageously, check during the time period with the first lift value process pump at least whether volume flowrate is increased to or has been increased on the volume flowrate reference value.
Be increased to or be increased on the volume flowrate reference value if determined described volume flowrate in the check of volume flowrate, rated head improves again and carries out the transition in characteristic adjusting so.This preferably proceed to along characteristic adjusting continuous, that is to say stepless transition, in order to power is complementary with the actual demand of equipment smoothly.
Preferably switch with uniform clock pulse between the first lift value and the second lift value, wherein, described pump moves with the second lift value in 10 seconds to 120 seconds time period or disconnects.
Reduce by activating lift, compare with the disconnection enduringly of pump, always have a spot of liquid to be transferred in hydraulic system, described liquid is hot water especially.Therefore, when recovering normal operation, there is following state, from described state, can carries out the transition to continuously along characteristic normally in service normally.
By the rated head of pump being reduced and periodically switching to minimum lift value downwards, especially the described pump of temporary transient disconnection, system keeps on the one hand can be observed and remain in the following state, in this state, the controlling mechanism of hydraulic system can automatically for example be made a response to the water temperature that improves by the potable water preparation.Compensated early by dropping on the lift minimum value by the more power in the water temperature drawing-in system that improves.
Propose a kind of pump that has control and regulate the electric operation of electronic equipment in addition, described control and adjusting electronic equipment are designed for realization the method according to this invention.At last, a kind of computer program that has for the instruction of carrying out the method according to this invention is proposed, when in the control of pump with regulate when realizing described method in the electronic equipment.
Description of drawings
Set forth other advantage, feature and the characteristic of the method according to this invention below by means of accompanying drawing.Shown in the accompanying drawing:
Fig. 1 has the H/Q plotted curve in Δ p-v characteristic curve and the decline zone when rated head reduces that marks;
Fig. 2 is from the H/Q plotted curve of zone to the characteristic transition of Δ p-v that descend;
The view of the transition of the continuous operation that runs to clock pulse of Fig. 3 pump, 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 here is heating plant.Reference character 2 marks the operating point on the characteristic curve of being positioned under the maximum (top) speed of pump.Described pump in Δ p-v characteristic curve K adjusted, according to described characteristic curve, is regulated rated head H with the volume flowrate demand Q of system linearly when normal operation.Under the maximum (top) speed of pump, obtain maximum volume flow rate Q_max at characteristic curve K.At this moment rated head H is with the H_soll mark and equal the characteristic curve rated head.
If the operating point of heating plant moves towards the direction of smaller volume flow Q along characteristic curve K, and volume flow Q reaches reference value Q_ref, described reference value is the about 5% of maximum volume flow rate Q_ref, for example is 150l/h, and then the rated head H of pump descends with respect to characteristic curve K.So operating point moves in the decline zone 3 that adds shade among Fig. 1.As long as when volume flow Q is lower than volume flowrate reference value Q_ref and lift minimum value H_min and does not also reach, 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 valve that is present in the heating system and the cracking pressure of gravity brake, that is to say, under the situation that thermostat valve is opened, can have volume flowrate.Minimum lift H_min for example typically is about 70cm being used for the pump of single household to two-family house, and is about 1m at the pump for bigger building.
When being lower than volume flowrate reference value Q_ref, the operating point of heating system continues to move towards the direction of smaller volume flow Q along the piping network parabola of not drawing by the decline of rated head H, until arriving minimum lift value H_min.Carry out described decline with constant rate of descent continuously, to such an extent as to the time that operating point is stayed in the zone 3 that descends is more long, rated head H just descends more manyly.
Descend to such an extent that have a following advantage at the continuous lift H_min unlike minimum in service, namely heating system keeps and can be observed, because always can there be minimum at least volume flow Q under the situation that valve not exclusively cuts out more.Rate of descent for example can be per minute 10U/min.
If described rated head H drops to, make and reach lift minimum value H_min, carry out the transition to the controlling of clock pulse of Heating Cyclic pump so according to the present invention, that is to say, carry out the transition to discontinuous operation, wherein, at lift minimum value H_min be lower than between its second lift value and alternately switch.
According to clock pulse than, i.e. on the one hand lift minimum value H_min and the lasting duration of second lift value existence on the other hand, can be adjusted to any lift value H between lift minimum value H_min and the described lower second lift value fifty-fifty.In slow relatively heating system, for example floor heating device, also can in second time period, carry out the disconnection of pump.At this, when at least when checking with lift minimum value H_min run duration whether volume flow Q is increased to or has been increased on the volume flowrate reference value Q_ref, heating system is both at lift minimum value H_min be lower than when switching between its lift value also temporary transient remain when disconnecting pump and can be observed.
As shown in figure 2, in this case, rated head H improves continuously, wherein carries out the transition in the adjusting of characteristic curve K.At this, rising speed is chosen as greater than rate of descent, in order to the power of pump is matched with desired volume flow Q rapidly.
Fig. 3 illustrates the pump that has gradually the second lift value that reduces from the transition in time of the continuous operation that runs to clock pulse.Supposition reaches volume flowrate reference value Q_ref when time point t=0.Subsequently, lift of pump H is reduced on the lift minimum value H_min continuously.If reach lift minimum value H_min at time point t1, carry out the transition to discontinuous in service and clock pulse ground conversion between the first lift value and the second lift value so, that is to say, periodically switch.At this, be chosen as identical switching time.
The lift minimum value H_min that reaches before the first lift value equals.The second lift value is lower than described lift minimum value and reduces gradually, until reaching the second lift minimum value H_min2.In the example as Fig. 3, as long as also do not reach the second lift minimum value, the second lift value reduces in each new clock pulse so.As an alternative, also can keep the second definite lift value in a plurality of clock pulse.Embodiment according to Fig. 3 has following advantage, and namely hydraulic system always remains and can be observed, and no matter whether backflow preventer is present in the system.
Claims (17)
1. be used for the method at hydraulic system pump of power optimization ground operation motorized motions under the situation of low-down volume flowrate (Q), wherein, regulate the rated head (H) of described pump along predefined characteristic curve (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) descends with respect to described predefined characteristic curve (K), described reference value is 1/10th of maximum volume flow (Q_max) on described characteristic curve (K) to the maximum, preferred 1/20th, wherein, as long as be lower than described volume flowrate reference value (Q_ref) and lift minimum value (H_min) when also not reaching in described volume flowrate (Q), just carry out described decline.
2. the method for claim 1 is characterized in that, described decline is carried out continuously.
3. method as claimed in claim 1 or 2 is characterized in that, described decline is carried out with constant rate of descent.
4. as the described method of one of above-mentioned claim, it is characterized in that, after reaching described lift minimum value, control described pump in the mode of clock pulse, wherein, in the first lift value be lower than between the second lift value of the described first lift value and alternately switch.
5. method as claimed in claim 4 is characterized in that, the described first lift value equals described lift minimum value (H_min).
6. as claim 4 or 5 described methods, it is characterized in that the described second lift value is zero.
7. as claim 4,5 or 6 described methods, it is characterized in that the described second lift value is reduced gradually.
8. as the described method of one of claim 4 to 7, it is characterized in that, check during the time period of moving described pump with the described first lift value at least whether described volume flowrate (Q) is increased to or has been increased on the described volume flowrate reference value (Q_reg).
9. as the described method of one of claim 4 to 8, it is characterized in that, between the described first lift value and the described second lift value, switch with uniform clock pulse, wherein, in the time period that is between 10 seconds to 120 seconds, move described pump with the described second lift value.
10. as one of above-mentioned claim described method, it is characterized in that, when described volume flowrate (Q) was increased to or has been increased on the described volume flowrate reference value (Q_reg), described lift (H) raise again and carries out the transition in the adjusting of described characteristic curve (K).
11. method as claimed in claim 10 is characterized in that, carries out the rising of described rated head (H) continuously.
12. as claim 10 or 11 described methods, it is characterized in that rising speed is greater than described rate of descent.
13. as one of above-mentioned claim described method, it is characterized in that described characteristic curve (K) is variable in time.
14., it is characterized in that described method is used for control Heating Cyclic pump as one of above-mentioned claim described method.
15. as one of above-mentioned claim described method, it is characterized in that the decline of the described rated head of described pump is by being reduced to the direct predefined lift rating value of described pump or realizing by reducing definite described characteristic characteristic curve rated head.
16. have the pump of the electric operation of control and adjusting electronic equipment, described control and electronic equipment are designed for realization according to the described method of one of claim 1 to 15.
17. have the computer program of instruction, described instruction be used for to be carried out as the method for the described pump for the operation electric operation of one of claim 1 to 15, when in the control of described pump with when regulating in the electronic equipment the described method of realization.
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 true CN103299076A (en) | 2013-09-11 |
| CN103299076B CN103299076B (en) | 2015-04-08 |
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ID=45771764
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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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104235014A (en) * | 2014-08-28 | 2014-12-24 | 北京动力机械研究所 | Revolving speed adjustment method and system of electric pump |
| CN105829804A (en) * | 2013-10-14 | 2016-08-03 | 格兰富控股联合股份公司 | Control of a pump to optimize heat transfer |
| CN107208646A (en) * | 2014-12-08 | 2017-09-26 | 威乐欧洲股份公司 | The lift of centrifugal pump is adjusted according to the volume flow of change |
| CN111465771A (en) * | 2017-12-19 | 2020-07-28 | Ksb股份有限公司 | Multi-pump device and method for operating the same |
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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 |
| 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 |
| 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 |
| CN111008480B (en) * | 2019-12-13 | 2023-05-23 | 湘潭大学 | Novel pump type selection method for centrifugal pump station energy expansion requirement |
| DE102020101410A1 (en) | 2020-01-22 | 2021-07-22 | Vaillant Gmbh | Method for setting a delivery rate in a heating circuit |
| DE102022100246A1 (en) | 2022-01-06 | 2023-07-06 | KSB SE & Co. KGaA | Process for the energy-optimized operation of a pump |
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| CN105829804A (en) * | 2013-10-14 | 2016-08-03 | 格兰富控股联合股份公司 | Control of a pump to optimize heat transfer |
| CN105829804B (en) * | 2013-10-14 | 2019-03-26 | 格兰富控股联合股份公司 | Optimize the control of the pump of heat transfer |
| US10527294B2 (en) | 2013-10-14 | 2020-01-07 | Grundfos Holding A/S | Control of a pump to optimize heat transfer |
| CN104235014A (en) * | 2014-08-28 | 2014-12-24 | 北京动力机械研究所 | Revolving speed adjustment method and system of electric pump |
| 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 |
| CN107208646A (en) * | 2014-12-08 | 2017-09-26 | 威乐欧洲股份公司 | The lift of centrifugal pump is adjusted according to the volume flow of change |
| CN107208646B (en) * | 2014-12-08 | 2019-11-29 | 威乐欧洲股份公司 | The method of the lift of centrifugal pump is adjusted according to the volume flow of variation |
| CN111465771A (en) * | 2017-12-19 | 2020-07-28 | Ksb股份有限公司 | Multi-pump device and method for operating the same |
| CN111465771B (en) * | 2017-12-19 | 2021-09-17 | Ksb股份有限公司 | Multi-pump device and method for operating the same |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2663774B1 (en) | 2016-03-30 |
| EP2663774A2 (en) | 2013-11-20 |
| DE102011008165A1 (en) | 2012-07-12 |
| WO2012095274A3 (en) | 2013-05-02 |
| RU2013137441A (en) | 2015-02-20 |
| CN103299076B (en) | 2015-04-08 |
| WO2012095274A2 (en) | 2012-07-19 |
| RU2553630C2 (en) | 2015-06-20 |
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