CN108071626A - The driving unit of hydraulic pressure and the method for operation - Google Patents
The driving unit of hydraulic pressure and the method for operation Download PDFInfo
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- CN108071626A CN108071626A CN201710844551.XA CN201710844551A CN108071626A CN 108071626 A CN108071626 A CN 108071626A CN 201710844551 A CN201710844551 A CN 201710844551A CN 108071626 A CN108071626 A CN 108071626A
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- China
- Prior art keywords
- driving unit
- operating point
- adjusting
- relation
- control unit
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/008—Reduction of noise or vibration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/02—Servomotor systems with programme control derived from a store or timing device; Control devices therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The present invention relates to a kind of driving unit of the hydraulic pressure for forming machine, including：The pump (4) driven by motor (3)；For adjusting and/or controlling adjusting or control unit (5) of the driving unit (1) to the theoretical operating point of driving unit (1) and the memory (6) with adjusting or control unit (5) is connected, wherein, storage is for by driving unit (1), directly or indirectly the relation between the characteristic parameter of caused sound and the data record for the different operating points for representing driving unit (1) and adjusting or control unit (5) composition are used in memory (6), based on the relation Choice Theory operating point.
Description
Technical field
The present invention relates to a kind of driving lists of the hydraulic pressure for forming machine of the feature of the preamble with claim 1
A kind of first and method for driving unit of the operation for the hydraulic pressure of forming machine.
Background technology
The driving device of hydraulic pressure is always more often driven first for the reason for energy aspect with the motor of rotational speed regulation, with
Just do not have unnecessary idling loss in shutting down, but also in partial load region with described in the operation of preferable efficiency
Drive system.Constant displacement pump can not only be driven herein and the conveying capacity needed is only adjusted by motor rotary speed, and by rotating speed
The motor of variation merges with adjusting pump group and is therefore of virtually two degree of freedom (horses in conveying capacity desired by selection
Up to rotating speed, pump deflection).
Therefore in the solution using adjusting pump, external conveying capacity (is also referred to as by motor rotary speed and pump deflection
Pump deflection angle) product formed.But that is, any delivered volume under the delivered volume of the maximum possible in system
It can be started with different operating points.
Example：Delivered volume outside 50% can be realized with operating status then：
- 50% pump deflection and 100% rotating speed,
- 100% pump deflection and 50% rotating speed and
- all classifications therebetween.
By 10 2,009 018 071 A1 of AT 11681 U1 or DE it is known that the optimization of the efficiency in the driving device of hydraulic pressure
When use the fact.Emitting noise of the driving device or forming machine of hydraulic pressure together with the driving device of hydraulic pressure is not examined herein
Consider.
The content of the invention
Therefore the task of the present invention is provide a kind of driving unit of hydraulic pressure and a kind of driving list for being used to run hydraulic pressure
The method of member, wherein being possible than operation in the prior art more in a low voice.
On hydraulic pressure driving unit this solved by the feature of claim 1.On method, this passes through claim 13
Feature solve.
It is arranged to, is provided for by driving unit directly or indirectly the characteristic parameter of caused sound and generation herein
Relation between the data record of the different operating points of table- driven unit, and based on the relation by the operating point of driving unit
As for adjusting and/or control the theoretical operation point selection of driving unit.
The research of applicant has shown that the relation that commonly assumes that of the pump motor in low rotating speed automatically is more uncomfortable
It closes.The present invention is using the unexpected understanding, so as to realize operation more in a low voice.
The optimization of emitting noise can be replaced or is utilized with reference to efficiency optimization as stated in the beginning.
The present invention can use in forming machine.Molding machine injection molding machine, die casting machine, press or the like in this way.
The favourable form of implementation of the present invention defines in the dependent claims.It could be provided as, motor is according to rotational speed regulation
Or control.
Can be sound size, such as sound for the characteristic parameter by the direct or indirect caused sound of driving unit
Pressure.Thus, it is possible to intuitively provide the relation again for operator.
But the characteristic parameter can also be the amount of the vibration of part of appliance, fluid pressure line pressure fluctuation amount or behaviour
The input that author is perceived based on the sound intensity.The combination of these parameters can certainly be used.
The operating point of data record can include at least one revolution speed and/or pump deflection.
It could be provided as, the definite operating point of data record is formed labeled as undesirable and adjusting or control unit
For the scope for the operating point that would not want to be used not as theoretical operating point or if the theory operating point is in not
In the scope of desired operating point, change theoretical operating point.
Based on measurement and empirical value, can be determined in different operating statuses according to the worst rotating speed of sound level and right
Its future is avoided when manipulating motor/pump unit.That is, undesirable rotating speed model is determined based on first measurement
It encloses, wherein, reach nevertheless, the delivered volume of desired outside is deflected by the pump of change in the desired range of speeds.
It may be set to be, if current operating point is fallen into undesirable scope, change operating point.
It is not restricted to the undesirable range of speeds in addition herein.Can also use it is undesirable pump range of deflection and certainly
Its combination can also be used.That is, can be scope to mark by rotating speed and the complete special value of pump deflection.
It may be set to be, the definite operating point of data record is labeled as desired by, and adjusting or control unit structure
Into for the Choice Theory operating point from the scope of desired operating point.
This allows, and not only avoids the operating point with extra high emitting noise, but also manipulation ground has especially intentionally
The operating point of operation in a low voice.The scope of desired operating point, which can be similar to undesirable operation point, to be the range of speeds, pumps partially
Turn scope and combination thereof.
The relation provided (such as when manufacturing the driving unit or forming machine of hydraulic pressure) can store in advance or can example
The measured value based on the measuring instrument for characteristic parameter as described in measuring with definite interval or it is continuous, especially running
Period is adapted to.
But the measuring instrument for measuring the characteristic parameter can be used for adjusting or control, wherein, the measurement
The measured value of instrument is used as the parameter of feedback (r ü ckf ü hren).
Herein can with it is also advantageous that, can be by characteristic parameter not only each arbitrary at the time of but also place
Variation (such as) measurement close to working space.Then calibration process can be started, wherein motor rotary speed (such as is adjusted in pressure
In operation) it slowly raises (referring also to figure).It can and then for example determine and/or redefine undesirable scope.
But the lasting or continuous measurement of characteristic parameter can also provide advantage.Fixation in equipment (or can
Movement ground) installation and lasting measuring device may not only standardization and restriction state in determine it is possible dry
Field is disturbed, and evaluates actual equipment periodic or the selectable order of each freedom and delivers this to optimization method.
Example therefore：
There is the emitting noise improved in the metering of injection molding machine.Only evaluation is actual during order " metering " for measuring device
State and equipment autonomously move the order to different operating points (such as different motor rotary speeds) in next cycle
And determine the technical best state of noise, then the state will be used in future.
Measuring instrument for measuring characteristic parameter can be differently composed.Other existing sensors can also be passed through
Assessment be inferred to improve emitting noise.
For the example of possible measuring instrument：
A) direct sound-pressure-level measurement (complicated, but maximally efficient),
B) vibration measurement in the equipment parts such as shielding part of frame, planar, grille.(sensor of relatively low cost,
Can pointedly be positioned in the resonating body of possible interference),
C) the pressure fluctuation measurement in pressure piping is (by selecting the operating point with relatively low pressure fluctuation also to make to set
Spare part is energized smaller；Advantage：The originally existed pressure sensor of hydraulic test can be assessed) and
D) (operator may be simply chosen with the fortune that the most comfortable is felt for it for the perception of device operator or operator
Row pattern).
Method a), b) and d) can be not only on the fixed position limited of equipment but also place completely alternatively uses.
That is, targetedly the sensor of variation may be located on the place of selection completely, so as to exactly there
Noise optimized transmitting (such as the sounding on working space or the evaluation of subjectivity；To the glass of neighbouring office or the like
Vibration measurement on plate).
It can in order to perform the different method (scope, continuous measurement for forbidding etc.) of the present invention and different measuring methods
Freely to combine.This is illustrated in the following table.
It can also also be selected in whole methods between peak value or average value optimization.
In addition it could be provided as, adjust or control unit considers the transmission power, most of minimum in Choice Theory operating point
The small volume flow to be conveyed (also referred to as external conveying capacity) and/or the minimum pressure to be maintained.
In addition could be provided as, adjust or control unit consider in Choice Theory operating point efficiency in terms of energy,
The especially efficiency of the driving unit of hydraulic pressure.Similar to based on for being selected by the characteristic parameter of sound caused by driving unit
Operating point is selected, can also use to measure the measurement of such as power in the additional selection based on the efficiency in terms of energy
The measured value of instrument.In addition can similarly desired and/or undesirable efficiency model be implemented on the efficiency in terms of energy
That encloses determines.
In a kind of particularly preferred form of implementation, operator it can be selected that whether the selection of operating point should preferential base
In characteristic parameter or based on the efficiency in terms of energy.If being, for example, the first situation, desired region is determined first.
Operating point is accurately determined in the efficiency that can be then based in terms of energy in region desired by (the feature based parameter).
If priority is arranged at the efficiency in terms of energy by operator, the method can be similarly effected, where it is desirable to
Efficiency range undertakes the role of desired scope.
Especially longer, constant equipment order (such as in injection molding machine again compression stage or during metering) draw other
" mutation " because can usually be related to emitting noise that is dull and being exactly therefore completely interfere with herein.
Instead of the dull constant noise in constant frequency can move into it is relatively comfortable for ear and by
Operator is freely selectable " sound model ".This may be simple vibration or ripple but is also (simple) melody.
In addition there is a possibility that, in longer constant order using rotating speed or sound variation, acoustically to show
The end of order.
It can also be envisaged that function is as failure or alarm signal.If such as automatic cycle based on Trouble Report interrupt, can
To generate siren signal using motor/pump combination.
The utilization of two degree of freedom such as motor rotary speed and pump deflection provides many possibilities, to provide with different acoustics
Characteristic identical outside delivered volume.
In addition the present invention can also combine constant displacement pump and use, although then there was only one degree of freedom available (rotating speed) simultaneously
And the change of operating status always also causes the change of external delivered volume.
Also require that protection includes the forming machine of driving unit of hydraulic pressure according to the invention.
Description of the drawings
The present invention other the advantages of and details drawn by attached drawing and the description of the drawings related with this.It is shown in which：
Fig. 1 shows the result of study of applicant, wherein, sound pressure level is measured dependent on revolution speed；
Fig. 2 shows the diagram of Fig. 1, wherein, desired and undesirable scope is additionally shown；
Fig. 3 shows the diagram of Fig. 2, wherein, the efficiency of driving unit is additionally shown；
Fig. 4 shows schematic diagram of the driving unit together with the customer being supplied to of injection molding machine；
Fig. 5 show another embodiment of the method according to the invention flow chart and
Fig. 6 shows the flow chart of the optional method of the additional optimization for efficiency.
Specific embodiment
It is not only recorded in Fig. 1 by the sound pressure level S of measurement but also by revolution speed n respectively about the time.It is basic in this rotating speed
On linearly improve, to establish the relation between sound pressure level s and revolution speed n.
As seen from Figure 1, the sound intensity (acoustic pressure S is used as characteristic parameter as mentioned) between revolution speed n extremely
The dull relation that the present assumes in the prior art does not apply to.But there is clear minimum value by interference and resonance effects
And maximum.Especially can be advantageously, rotating speed slightly to be improved on certain operating point, to realize under acoustic pressure
Drop.
Specifically, motor/pump system accelerates to upwards when during pressure remains at 200 bars from 200 revs/min
The sound pressure level of 2600 revs/min and total system is measured.It most clearly can be seen that at about 1700 revs/min and about
1900 revs/min of sound pressure level peak value (81 and 80dBA), when about 1800 revs/min of the rotating speed only small changed, show
Write smaller (about 73dBA).The revolution speed N of optimization can be read now by the chart.Alternatively, it is first determined desired region
E.This is shown in FIG. 2.
As the additional condition of the revolution speed n or desired scopes E for optimization, minimum revolution speed can be used in addition
(if the conveying capacity of such as one outside at least to be maintained only is realized by definite minimum speed).In this example
In, from 1600 revs/min of minimum speed.As can be easily drawn as the figure, the exactly manipulation of minimum speed is not
Optimization, because this causes more loud operation than the operating point in desired region E.Corresponding area with high acoustic pressure
Domain is marked as undesirable scope U.
It additionally can be into the optimization of line efficiency W.This is shown in FIG. 3, in the drawings additionally record efficiency W.
Equally two point P1 and P2 of record, described two points are respectively in individually desired region E.However because point
P2 provides higher efficiency P than point P1, and the P2 is functioned well as operating point.
The data of Fig. 3 can be stored in the memory 6 of control or adjustment unit 5.In addition could be provided as, by the relation
By be used for detect such as acoustic pressure measuring instrument 7 measured value change (such as when corresponding measured value be different from Fig. 3 acoustic pressure
When curve S is shown in another existing acoustic pressure during corresponding revolution speed n).
Fig. 4 shows driving unit 1 according to the invention together with the forming machine 2 schematically shown.Pair of forming machine 2 is only shown
In the important component of the present invention.These are to be used to compress for closing cylinder body 8, the compression cylinder body 9 for closing closing unit
Hydraulic motor 11 with jet blower, for the spray cylinder body 10 of spray amount of plastic and for measuring amount of plastic.
Driving unit 1 has motor 3 and the pump 4 driven by motor 3, and the pump is in this case as with variable pump
The pump 4 of deflection α is implemented.By pump 4, will customer be supplied to by the hydraulic fluid of 12 pressure-loaded of tank (preferred oil).
Driving unit 1 equally has control or adjustment unit 5, and the control or adjustment unit not only control or adjust motor
The 3 and pump deflection α of control or adjusting pump 4.
In addition to the relation between acoustic pressure S and revolution speed n, naturally it is also possible to by acoustic pressure S and not only revolution speed n but also
The relation between α is deflected with pump to be stored in memory 6.
Equally exist to measure the measuring instrument 7 of acoustic pressure S in this embodiment.
Fig. 5 shown for a kind of flow chart of alternative method according to the invention, can be during forming machine 2 is run
Implement.Such as in different molding cycles, the method step of metering is respectively for revolution speed n1To nnα is deflected to pumpn
Different values to implement.Sound level S is measured equally in each molding cycle.Control or adjustment unit 5 can be then by described
Measurement extracts optimal value and can be hereafter with the revolution speed n of optimization and pump deflection α meterings.
Fig. 6 is the flow chart of optional additional method, wherein, the efficiency of driving unit 1 also is subjected to optimize.
Herein as described in Figure 5 before, however the value pair individually optimized is not exported, but it is a certain amount of acceptable
Value pair.
The transmission power by the power that motor 3 receives and pump 4 is additionally measured in each molding cycle.It then can be by
Value as acceptable identification is to selecting for revolution speed N and pump deflection α not only according to the flat S of sound but also according to efficiency W optimizations
Value pair.
It is alternatively possible to optimize efficiency and the value by selecting herein according to Fig. 6 first to optimizing the sound according to Fig. 5
Grade.
Claims (13)
1. the driving unit of the hydraulic pressure for forming machine, including
- the pump (4) driven by motor (3),
- be used for driving unit (1) adjusting and/or the adjusting controlled to the theoretical operating point of driving unit (1) or control unit
(5) and
- the memory (6) being connected with adjusting or control unit (5),
It is characterized in that, it is stored in memory (6) for the spy by driving unit (1) sound caused by direct or indirect
Sign property parameter and represent driving unit (1) different operating points data record between relation, and adjust or control singly
First (5) form and are used for, based on the relation Choice Theory operating point.
2. driving unit described in accordance with the claim 1, which is characterized in that the adjusting or control of motor (3) are according to speed setting.
3. according to the driving unit described in claim 1 or 2, which is characterized in that the characteristic parameter is one of following or it
Combination：
- acoustic pressure (S)
The amount of the vibration of-equipment parts
The amount of pressure fluctuation in-fluid pressure line
The input that-operator is perceived based on the sound intensity.
4. according to the driving unit described in one of claims 1 to 3, which is characterized in that the operating point of data record includes at least
One revolution speed and/or pump deflection.
5. according to the driving unit described in one of Claims 1-4, which is characterized in that the definite operating point mark of data record
It is denoted as undesirable and adjusting or control unit (5) composition is used for, the scope for the operating point (4) that would not want to does not have to as reason
By operating point or if the theory operating point is in the scope of undesirable operation point (4), change theory operation
Point.
6. according to the driving unit described in one of claim 1 to 5, which is characterized in that the definite operating point mark of data record
Desired by being denoted as, and adjusting or control unit (5) composition are used for, and Choice Theory is transported from the scope of desired operating point (E)
Row point.
7. according to the driving unit described in one of claim 1 to 6, which is characterized in that set to measure the characteristic ginseng
The measuring instrument (7) of amount.
8. according to the driving unit described in claim 7, which is characterized in that control or adjustment unit (5) composition are used for, and will deposited
The relation of storage is based on the measured value of measuring instrument (7), is especially adapted to during operation in reservoir (6).
9. according to the driving unit described in claim 2 and 7, which is characterized in that setting motor (3) adjusting, wherein, adjust or
Control unit (5) composition is used for, and the characteristic parameter is used as to the parameter of feedback.
10. according to the driving unit described in one of claim 1 to 9, which is characterized in that adjust or control unit (5) is formed and used
In in Choice Theory operating point, considering the transmission power, the minimum volume flow to be conveyed and/or minimum of minimum will maintain
Pressure.
11. according to the driving unit described in one of claims 1 to 10, which is characterized in that adjust or control unit (5) is formed and used
In considering the efficiency of efficiency in terms of energy, the especially driving unit (1) of hydraulic pressure in Choice Theory operating point.
12. forming machine, including the driving unit according to the hydraulic pressure described in one of claim 1 to 11.
13. for run forming machine hydraulic pressure driving unit method, the driving unit especially according to claim 1 to
Driving unit described in one of 11, wherein, pump (4) is driven by motor (3), which is characterized in that
- provide for by driving unit (1) directly or indirectly caused by sound characteristic parameter and represent driving unit
(1) relation between the data record of different operating points and-based on the relation select driving unit (1) operating point as
For adjusting and/or controlling the theoretical operating point of driving unit (1).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2016212579221 | 2016-11-17 | ||
| CN201621257922 | 2016-11-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108071626A true CN108071626A (en) | 2018-05-25 |
| CN108071626B CN108071626B (en) | 2021-03-26 |
Family
ID=62159332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710844551.XA Active CN108071626B (en) | 2016-11-17 | 2017-09-19 | Molding machine and method for operating the same |
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| Country | Link |
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| CN (1) | CN108071626B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050173114A1 (en) * | 2004-02-03 | 2005-08-11 | Cudmore Julian R. | System and method for optimizing production in an artificially lifted well |
| US20070017672A1 (en) * | 2005-07-22 | 2007-01-25 | Schlumberger Technology Corporation | Automatic Detection of Resonance Frequency of a Downhole System |
| US7693684B2 (en) * | 2005-10-17 | 2010-04-06 | I F M Electronic Gmbh | Process, sensor and diagnosis device for pump diagnosis |
| CN102439318A (en) * | 2009-05-20 | 2012-05-02 | Ksb股份公司 | Method and device for determining an operating point of a work machine |
| CN102762865A (en) * | 2010-02-12 | 2012-10-31 | 奥尔韦勒有限责任公司 | Operational control device for a positive-displacement pump, pump system and method for operating the like |
| US20140026548A1 (en) * | 2011-04-15 | 2014-01-30 | Volvo Construction Equipment Ab | Method and a device for reducing vibrations in a working machine |
| CN104520585A (en) * | 2012-02-02 | 2015-04-15 | Ghd私人有限公司 | Pump efficiency determining system and related method for determining pump efficiency |
-
2017
- 2017-09-19 CN CN201710844551.XA patent/CN108071626B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050173114A1 (en) * | 2004-02-03 | 2005-08-11 | Cudmore Julian R. | System and method for optimizing production in an artificially lifted well |
| US20070017672A1 (en) * | 2005-07-22 | 2007-01-25 | Schlumberger Technology Corporation | Automatic Detection of Resonance Frequency of a Downhole System |
| US7693684B2 (en) * | 2005-10-17 | 2010-04-06 | I F M Electronic Gmbh | Process, sensor and diagnosis device for pump diagnosis |
| CN102439318A (en) * | 2009-05-20 | 2012-05-02 | Ksb股份公司 | Method and device for determining an operating point of a work machine |
| CN102762865A (en) * | 2010-02-12 | 2012-10-31 | 奥尔韦勒有限责任公司 | Operational control device for a positive-displacement pump, pump system and method for operating the like |
| US20140026548A1 (en) * | 2011-04-15 | 2014-01-30 | Volvo Construction Equipment Ab | Method and a device for reducing vibrations in a working machine |
| CN104520585A (en) * | 2012-02-02 | 2015-04-15 | Ghd私人有限公司 | Pump efficiency determining system and related method for determining pump efficiency |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108071626B (en) | 2021-03-26 |
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