CN1846062B - Electromagnetic pump - Google Patents
Electromagnetic pump Download PDFInfo
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- CN1846062B CN1846062B CN2004800255397A CN200480025539A CN1846062B CN 1846062 B CN1846062 B CN 1846062B CN 2004800255397 A CN2004800255397 A CN 2004800255397A CN 200480025539 A CN200480025539 A CN 200480025539A CN 1846062 B CN1846062 B CN 1846062B
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- movable piece
- electromagnetic
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- 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
- 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
- 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
- F04B17/04—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids
- F04B17/042—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the solenoid motor being separated from the fluid flow
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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
- F04B2201/00—Pump parameters
- F04B2201/02—Piston parameters
- F04B2201/0201—Position of the piston
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Electromagnetic Pumps, Or The Like (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Abstract
An electromagnetic pump capable of highly precisely detecting an operating position of a movable element without enlarging the device. A hollow-core detecting coil (53) for detecting reciprocating motion of a movable element (10) is fitted in around a cylinder so as to be coaxial with electromagnetic coils (50a, 50b).
Description
(1) technical field
The present invention relates to a kind of electromagnetic pump, especially relate to the compact type electromagnetic pump of fluids such as being used for conveying gas, liquid.
(2) background technique
Claimant of the present invention had proposed a kind of miniaturization in the past, the electromagnetic pump of slimming, in this electromagnetic pump, in the cylinder chamber of fixed block side, contain and to make the free reciprocating movable piece of making by magnetic material, by switching on to being embedded in cylinder electromagnetic coil on every side, thereby in the pump chamber between movement direction bi-side that are formed on movable piece and cylinder both ends of the surface, one of them pump chamber sucks fluid from the outside by first valve, and by the 2nd valve fluid is sent to the outside, and another pump chamber also has same pumping action (with reference to patent documentation 1).In Figure 11, the S utmost point side that the magnetic flux that is produced by the N utmost point side of the magnet 103 of movable piece 101 is got back to magnet 103 via the interior yoke 104a of fixed block 102 sides, outer yoke 105, interior yoke 104b constitutes magnetic loop.By electromagnetic coil 106a, 106b are switched on, this electromagnetic coil 106a, 106b are subjected to the electromagnetic force effect in above-mentioned magnetic field, but, thereby make movable piece 101 move because of the axial direction (above-below direction of Figure 11) of reaction force along cylinder because electromagnetic coil 106a, 106b are fixed on fixed block 102 sides.
Patent documentation 1: Japan Patent is special is willing to 2002-286188 number
In above-mentioned electromagnetic pump, detect the movable piece of accommodating in the cylinder portion 109 of being sealed by upper frame 107 and underframe 108 at two ends 101 whether regular event or movable piece 101 action of movable piece such as whether in suitable movable range, move, have a lot of methods to consider.As the example in the motion detection method of this movable piece 101, as shown in figure 11, magnetic quantity transducer (Hall element etc.) 110 is arranged in the arranged outside of underframe 108.Magnetic quantity transducer 110 can be by detecting the movable position that the magnetic flux that leaks from the magnet 103 of movable piece 101 detects movable piece 101.
In the electromagnetic pump structure of the movable piece with magnetic quantity transducer shown in Figure 11, because movable piece 101 is housed in by in the cylinder portion 109 that framework 107,108 is sealed up and down, near the of movable piece 101 can't be installed magnetic quantity transducer 110.In addition, because the leakage field of movable piece 101 is less, and if magnetic quantity transducer 110 be arranged on the position of separating with movable piece 101, then can cause device to maximize, and magnetic quantity transducer 110 detected Magnetic flux densities will become littler, be difficult to detect the variation of Magnetic flux density.Specifically, on one about if magnetic quantity transducer 110 is arranged in the framework 107,108, then the variation of the Magnetic flux density of magnetic quantity transducer 110 is always same direction, thereby the polarity inversion that the to-and-fro motion by movable piece 101 causes can not take place, and the sensitivity of sensor is restricted.
In addition, magnetic quantity transducer 110 is subjected to easily because of the influence to the magnetic field that produces of electromagnetic coil 106a, 106b energising.That is, reciprocating cycle of movable piece 101 is identical with the cycle of the change in magnetic flux density of the leakage field of movable piece 101.In addition, the excitation cycle that produces because of electromagnetic coil energising is also identical.Therefore, the variation that is difficult to judge the detected Magnetic flux density of magnetic quantity transducer be that to-and-fro motion by movable piece 101 causes, or cause by the excitation of electromagnetic coil 106a, 106b.
(3) summary of the invention
In order to overcome the above problems, the object of the present invention is to provide a kind of electromagnetic pump of influence of the magnetic field that under the situation that can not cause device to maximize, can detect the operating position of movable piece accurately and not be vulnerable to form because of the electromagnetic coil energising.
The present invention has following structure to achieve these goals.
A kind of electromagnetic pump contains the movable piece with permanent magnet in the cylinder; By making movable piece reciprocating along axial direction in cylinder to being embedded in a plurality of hollow electromagnetic coils energisings on every side of this cylinder, and then utilize the pump chamber conveyance fluid that forms in the cylinder, it is characterized in that, around cylinder, embed the reciprocating hollow Test coil that is useful on the detection movable piece coaxially with electromagnetic coil, this Test coil is adjacent to embed with electromagnetic coil axial direction both ends of the surface respect to one another, on the axial direction both ends of the surface of this Test coil, be provided with yoke, and on the outer circumferential face of this Test coil, be provided with the outer yoke of making by magnetic material.
In addition, electromagnetic pump is characterised in that, the frequency of the induced voltage of Test coil is 2 times of reciprocating frequency of movable piece.
In addition, electromagnetic pump is characterised in that, comes the flow of testing pump according to the detected induced voltage of Test coil.In this case, can set critical value according to the detected induced voltage of Test coil, whether the flow that comes testing pump is greater than certain flow, also can set critical value according to the detected induced voltage of Test coil, judge whether movable piece is reciprocating normally, also can carry out the drive controlling of movable piece according to the induced voltage of Test coil.
In addition, preferably in the equable detection range of the induced voltage that the excitation by electromagnetic coil causes the induced voltage to Test coil detect.
If use above-mentioned electromagnetic pump, then around the bigger cylinder of the leakage field of movable piece, embed the reciprocating hollow Test coil that is useful on the detection movable piece coaxially with electromagnetic coil, therefore, can utilize the to-and-fro motion of movable piece and make the inductive voltage value that produces on the Test coil strengthen, thereby the raising testing precision can detect the action of movable piece under the situation that does not cause pump to maximize.
In addition, when the axial direction both ends of the surface of Test coil and outer circumferential face are provided with the yoke of being made by magnetic material, then the magnetic flux with the Test coil interconnection in the magnetic flux of movable piece generation increases, thereby has increased the inductive voltage value that produces on the Test coil, makes detection sensitivity improve.
In addition, the frequency of the induced voltage of Test coil is 2 times of reciprocating frequency of movable piece, thereby also be 2 times of frequency that carry out the magnetic field that electromagnetic coil was produced of excitation with the frequency identical with the movable piece to-and-fro motion, because the change in magnetic flux density that the change in magnetic flux density that the to-and-fro motion of movable piece causes and the excitation of electromagnetic coil cause is separated easily, thereby improve testing precision.
In addition, according to the induced voltage of Test coil, can detect the to-and-fro motion of movable piece and the flow of pump, and then also can carry out drive controlling movable piece.
(4) description of drawings
Fig. 1 is the sectional view of the electromagnetism pump structure that the present invention relates to of expression.
Fig. 2 is the sectional view of the main structure of the electromagnetic pump that relates to of expression first embodiment.
Fig. 3 is the state description figure that moves the magnetic flux that acts on Test coil because of movable piece.
Fig. 4 is the state description figure that moves the magnetic flux that acts on Test coil because of movable piece.
Fig. 5 is the state description figure that moves the magnetic flux that acts on Test coil because of movable piece.
Fig. 6 is the sectional view of the main structure of the electromagnetic pump that relates to of expression second embodiment.
Fig. 7 is the flow detection plotted curve of the electromagnetic pump that relates to of the 3rd embodiment.
Fig. 8 is the flow detection plotted curve of the electromagnetic pump that relates to of the 3rd embodiment.
Fig. 9 is the plotted curve of the motion detection of the electromagnetic pump movable piece that relates to of expression the 4th embodiment.
Figure 10 is the plotted curve of the motion detection of the electromagnetic pump movable piece that relates to of expression the 4th embodiment.
Figure 11 is the partial sectional view of the motion detection of the existing movable piece of expression.
(5) embodiment
Preferable example to the electromagnetic pump that the present invention relates to elaborates with reference to the accompanying drawings.The electromagnetic pump of this example can be widely used in following electromagnetic pump: contain the movable piece with permanent magnet in the cylinder, by making movable piece reciprocating along axial direction in cylinder, and then utilize the pump chamber conveyance fluid that forms in the cylinder to the hollow electromagnetic coil energising that is embedded in around this cylinder.
In Fig. 1, will the typical structure of electromagnetic pump be described.Movable piece 10 is housed in the airtight cylinder, and be arranged to can be reciprocating on the axial direction of cylinder.Movable piece 10 by discoideus magnet 12 and on thickness direction in a couple of clip magnet 12 yoke 14a, 14b constitute.Magnet 12 is that one side is the permanent magnet that the S polar region is magnetized on thickness direction (above-below direction among Fig. 1) for the N utmost point, another side.Interior yoke 14a, 14b are made by magnetic material, and yoke 14a, 14b have diameter greater than the plat part 15a of magnet 12 and the lip part 15b that holds up into short tubular at the peripheral portion of plat part 15a in each.The outer circumferential face of lip part 15b forms magnetic flux that magnet 12 the produced flux interaction face in movable piece 10 sides.
To describe the structure of the fixed block side of electromagnetic pump based on Fig. 1 below.The a pair of upper frame 20a that is made by nonmagnetic substance and underframe 20b made up and formed columnar cylinder, in this cylinder, contain can be reciprocating movable piece 10.In this example, on the frame body 22b of underframe 20b, be formed with cylinder cylindraceous portion 24.The frame body 22a that is fitted to upper frame 20a by the end with this cylinder portion 24 goes up in the set telescoping groove 28, thereby forms the cylinder that axial both ends of the surface are sealed by pair of frames 20a, 20b.On the position of telescoping groove 28 and end face butt cylinder portion 24, be provided with sealing material 29, conflict on the sealing material 29 by the end face that makes cylinder portion 24, thus from the outside to sealing in the cylinder.In addition, also can cylinder portion 24 be prolonged and be fitted to the underframe 20b from upper frame 20a.In addition, cylinder portion 24 also can separate formation with upper frame 20a and underframe 20b.
Like this, the both ends of the surface of cylinder are sealed by upper frame 20a and underframe 20b, in the movement direction bi-side of movable piece 10 with form pump chamber 30a, 30b respectively between the internal face of framework 20a, 20b up and down. Pump chamber 30a, 30b are equivalent to the gap that forms between the frame body 22b of the frame body 22a of the both ends of the surface of movable piece 10 and upper frame 20a, underframe 20b.In addition, movable piece 10 is to slide with the internal surface state of contact of cylinder portion 24 and with the sealing state with 24 hermetic seals of cylinder portion or liquid sealing.In order to make the sliding capability of movable piece 10 good, and coating fluor resin coating and DLC coating (diamond-like coating) etc. have the coating of lubricity and antirust ability concurrently on the outer circumferential face of interior yoke 14a, 14b.In addition, also can be provided for the restriction revolving part that prevents that movable piece 10 from rotating in a circumferential direction.
On the end face (internal face) of frame body 22a, 22b, buffer 32 is installed.Buffer 32 at the terminal position of the moving range of movable piece 10, absorb in impact during the end face butt of yoke 14a, 14b and frame body 22a, 22b be provided with.In addition, buffer 32 on the end face that can be arranged on frame body 22a, 22b, in also can being arranged on on the yoke 14a, 14b end face and face frame body 22a, 22b butt.
In the frame body 22a of upper frame 20a, inhaling valve 34a and send valve 36a and pump chamber 30a is provided with communicatively.In the frame body 22b of underframe 20b, inhaling valve 34b and send valve 36b and pump chamber 30b is provided with communicatively.
In upper frame 20a and underframe 20b, be provided with the suction runner 38a, the 38b that are communicated with inhaling valve 34a, 34b.In upper frame 20a and underframe 20b, be provided with send that valve 36a, 36b be communicated with send runner 40a, 40b.The suction runner 38b of the suction runner 38a of upper frame 20a and underframe 20b is communicated with by connecting tube 42, and the runner 40b that sends that sends runner 40a and underframe 20b of upper frame 20a is communicated with by connecting tube 44.Thus, the suction runner of upper frame 20a and underframe 20b, send runner and send mouthfuls 40 with a suction port 38 and one respectively and be communicated with.
Among Fig. 1, embedding around cylinder is free electromagnetic wire circle 50a, 50b. Electromagnetic coil 50a, 50b are separated by on the axial direction of cylinder at a certain distance, and are configured on the position that equates with the center position of cylinder-bore axis direction.The axial length of electromagnetic coil 50a, 50b is set at longer than the movable range of the lip part 15b of interior yoke 14a, 14b.Moreover the direction of winding of electromagnetic coil 50a and electromagnetic coil 50b is opposite, through the power supply of same power supply and after the energising, and both current opposite in direction of flowing through.The direction of winding that why makes electromagnetic coil 50a, 50b be on the contrary for make act on the electric current interconnection of the magnetic flux of magnet 12, that flow among electromagnetic coil 50a, the 50b on the power stack, and as reaction force acts to movable piece 10, make this power become thrust.
Be arranged to the periphery of outer yoke 52 encirclement electromagnetic coil 50a, 50b tubular.Outer yoke 52 uses magnetic material, in order that by increasing the magnetic flux that interconnects with electromagnetic coil 50a, 50b electromagnetic force is acted on the movable piece 10 effectively.In addition, be provided with the lip part 15b that on axial direction, holds up, so, can reduce magnetic resistance from interior yoke 14a, 14b to the magnetic loop of outer yoke 52 for the magnetic flux of magnet 12 generations at the periphery of the interior yoke 14a, the 14b that constitute movable piece 10.
Like this, make from the total magnetic flux of movable piece 10 effects and increase (guaranteeing magnetic circuit), and because the electric current that flows among the magnetic flux that magnet 12 produces and electromagnetic coil 50a, the 50b interconnects on axial direction with meeting at right angles, thereby, the thrust of axial direction in movable piece 10, can be produced effectively.In addition, because that the quality with movable piece 10 of this structure is compared with the thrust that is produced is less,, also can increase output flow so can realize quick response.
The pumping action of the electromagnetic pump in this example is presented as and utilizes electromagnetic coil 50a, 50b to make movable piece 10 reciprocating, and then makes pump chamber 30a, 30b alternately suck, send fluid.That is to say that under the state of Fig. 1, if movable piece 10 moves down, the pump chamber 30a of a side will suck fluid, the pump chamber 30b of opposite side will send fluid simultaneously.On the contrary, if movable piece 10 moves up, the pump chamber 30a of a side will send fluid, and the pump chamber 30b of opposite side will suck fluid.Like this, though movable piece 10 towards which side shifting, fluid all can suck and discharge, thereby can restrain the fluctuation of fluid, conveyance fluid effectively.
For the electromagnetic pump in this example, interior yoke 14a, 14b with lip part 15 are installed on movable piece 10, owing to inhaling valve 34a, 34b closely are set and send valve 36a, 36b with the both ends of the surface of movable piece 10, thereby thin and small-sized pump can be provided.Electromagnetic pump in the example can be made the miniature pump about high 15mm, wide 20mm.
In addition, the electromagnetic pump in this example can be used for the gas or the conveying of liquid, and the kind of fluid is unrestricted.When using,, also can use to connect the multi-stage type movable piece 10 that a plurality of same unit movable pieces that are made of magnet 12, interior yoke 14a, 14b form if the discharge pressure under movable piece 10 is not enough as liquid pump.By connecting a plurality of units movable piece, can make movable piece have bigger thrust, thereby make electromagnetic pump have required discharge pressure.
Embodiment 1
Below with reference to Fig. 2～Fig. 5, the structure of the to-and-fro motion detection unit of above-mentioned electromagnetic pump movable piece and the preferred embodiment that detects action are described.In Fig. 2, around cylinder, embed the reciprocating hollow Test coil 53 that is useful on detection movable piece 10 coaxially with electromagnetic coil 50a, 50b.Specifically, Test coil 53 is adjacent to embed with the axial direction both ends of the surface of electromagnetic coil 50a and electromagnetic coil 50b around the cylinder.
Fig. 3～Fig. 5 is illustrated in movable piece 10 when reciprocating, acts on magnetic flux state on the Test coil 53 accordingly with the operating position of movable piece 10.State when the state the when state when Fig. 3 represents that movable piece 10 is above the movable range intrinsic displacement arrives, Fig. 4 represent that movable piece 10 is displaced to intermediate portion, Fig. 5 represent that movable piece 10 is displaced to the below.With magnetic flux (state of Fig. 4) maximum when movable piece 10 is displaced to the neutral position of movable range of Test coil 53 interconnection, (state of Fig. 3 and Fig. 5) minimum in the time of above or below movable piece 10 is displaced to.Movable piece 10 carries out reciprocating action according to the reiteration ground of Fig. 3 → Fig. 4 → Fig. 5 → Fig. 4 → Fig. 3.During movable piece 10 works are once reciprocating, the increase and decrease in 2 cycles appears in the magnetic flux that passes Test coil 53.Therefore, 2 cycles also appear in the induced voltage that produces on the Test coil 53.In addition, the detection of Test coil 53 action can only be carried out during moving between Fig. 3 and Fig. 4 at movable piece 10, or only carries out during moving between Fig. 4 and Fig. 5 at movable piece 10.In this case, movable piece 10 do once reciprocating during in, 1 cycle appears in the induced voltage that produces on the Test coil 53.In addition, on movable piece 10, also can save in yoke 14a, 14b.
Embodiment 2
With reference to Fig. 6 other examples of the to-and-fro motion detection unit of the movable piece of electromagnetic pump are described below.For with Fig. 2 in the same parts, the component symbol that mark is the same describes.In Fig. 6, Test coil 53 is adjacent to embed with the axial direction both ends of the surface of electromagnetic coil 50a, electromagnetic coil 50b around the cylinder, and this is identical with the front.In the present embodiment, on the axial direction both ends of the surface of Test coil 53, be provided with yoke 26a, 26b that magnetic material is made, and yoke 52 outside on the outer circumferential face of Test coil 53, being provided with.Like this, the magnetic flux that produces from movable piece 10 forms the magnetic loop via yoke 26a, outer yoke 52, yoke 26b.Like this, because the magnetic flux with Test coil 53 interconnection from the magnetic flux that movable piece 10 produces increases,, thereby detection sensitivity is improved so the inductive voltage value of generation increases on the Test coil 53.In addition, if on the axial direction both ends of the surface of Test coil 53, yoke 26a, 26b are set, then also can save outer yoke 52.
Embodiment 3
Below with reference to Fig. 7 and Fig. 8, the application example that the to-and-fro motion of electromagnetic pump movable piece is detected describes.For with Fig. 2 in the same parts, the component symbol that mark is the same describes.Present embodiment is characterised in that, comes the flow of testing pump according to Test coil 53 detected induced voltages.That is, the flow of pump is the product of the cross-section area S of movable piece 10 reciprocating speed V and movable piece 10.The reciprocating speed V of movable piece 10 is big more, and then the flow of pump is big more, thereby the induced voltage of Test coil also increases.Therefore, in Fig. 7, can be according to the derive flow of pump of the amplitude size of the induced voltage that produces on the Test coil 53.
In addition, in Fig. 8, also can set critical value, judge that whether movable piece 10 is reciprocating according to Test coil 53 detected induced voltages.That is, in advance the induced voltage of Test coil 53 is set and the corresponding critical value voltage of certain flow.Like this, be transformed into pulse output after utilizing comparison circuit etc. that detected induced voltage and critical value voltage are compared.Then produce pulse during greater than certain flow, then do not produce pulse during less than certain flow.In addition, when control device etc. is switched on to electromagnetic coil 50a, 50b with the voltage under the certain condition, electric current, frequency etc., the upper limit or the lower limit of the amplitude range of the induced voltage of the Test coil 53 during with movable piece 10 proper motions are made as critical value voltage, thereby whether the movable piece 10 that also can detect pump is normally moving.
Embodiment 4
Below with reference to Fig. 9 and Figure 10, the application example that the to-and-fro motion of electromagnetic pump movable piece is detected describes.For with Fig. 2 in the same parts, the component symbol that mark is the same describes.Present embodiment is characterised in that, carries out the drive controlling of movable piece 10 according to Test coil 53 detected induced voltages.Promptly, in order to make movable piece 10 regular events, and not shown control device between carry out feedback control, thereby the energising amount of may command electromagnetic coil 50a, 50b, the flow of pump, with up and down frame body 22a, 22b do not conflict and control for the movable range that makes movable piece 10.
In addition, preferably in the equable detection voltage range of the induced voltage that the excitation by electromagnetic coil 50a, 50b causes the induced voltage to Test coil detect. Electromagnetic coil 50a, 50b are equipped with in the top and the bottom of Test coil 53, and the electric current of this electromagnetic coil 50a, 50b changes to make and produce induced voltage on the Test coil 53.Fig. 9 represents to comprise the induced voltage plotted curve of the caused influence of current change quantity of electromagnetic coil 50a, 50b at interior Test coil 53.After the excitation direction of electromagnetic coil 50a, 50b had just been switched, electric current was bigger with respect to the variable quantity of time, thereby bigger to the influence of the induced voltage of Test coil 53.Therefore, at the current change quantity of electromagnetic coil 50a, 50b hour, when promptly the induced voltage that produces in the to-and-fro motion because of movable piece 10 is in negative direction among Fig. 9, go up the setting voltage critical value by induction voltage waveform (A part and B part on the plotted curve of Fig. 9) at this moment, the electric current that can reduce electromagnetic coil 50a, 50b changes the influence that is brought.In Fig. 9, when the current change quantity of electromagnetic coil 50a, the 50b of A portion and B portion is big, can calculate the mean value of the induced voltage of A portion and B portion, calculate its mean value after perhaps detecting the pulse width of A portion and B portion, perhaps only detect the frequency content (2 times of compositions of the reciprocating frequency of movable piece 10) of the induced voltage of Test coil 53.
The frequency of the induced voltage of Test coil 53 is 2 times of reciprocating frequency of movable piece 10 among Fig. 9, and Figure 10 represents the situation that both frequencies are identical.The induced voltage of Test coil 53 peak value occurs in C portion and D portion, thus the influence that the electric current that causes the both similarly to be subjected to electromagnetic coil 50a, 50b changes, thereby whether be difficult to detect the to-and-fro motion of movable piece 10 normal.Therefore, be made as 2 times of reciprocating frequency of movable piece 10 by the frequency with the induced voltage of Test coil 53, whether the to-and-fro motion that can easily detect movable piece 10 is normal.
In the electromagnetic pump shown in Figure 1, being located at a side of movable piece 10 and suction runner 38a, the 38b of opposite side is communicated with, being located at a side of movable piece 10 and send runner 40a, the 40b of opposite side also is communicated with, in other words, be the example that is communicated with runner in parallel, use but also a plurality of electromagnetic pumps in series can be made runner be communicated with the back.In this case, can make to send runner 40a and suck runner 38b to be communicated with, make to send runner 40b and suck runner 38a to be communicated with.
Claims (5)
1. electromagnetic pump, contain movable piece (10) in the cylinder with permanent magnet (12), by making movable piece (10) reciprocating along axial direction in cylinder to being embedded in a plurality of hollow electromagnetic coils (50a, the 50b) energising on every side of this cylinder, carry out FLUID TRANSPORTATION with the pump chamber (30a, 30b) that in cylinder, forms, it is characterized in that
Around described cylinder, embed the reciprocating hollow Test coil (53) that is useful on detection movable piece (10) coaxially with electromagnetic coil (50a, 50b), this Test coil (53) is adjacent to embed with electromagnetic coil (50a, 50b) axial direction both ends of the surface respect to one another, on the axial direction both ends of the surface of this Test coil (53), be provided with yoke (26a, 26b), and on the outer circumferential face of this Test coil (53), be provided with the outer yoke of making by magnetic material (52).
2. electromagnetic pump as claimed in claim 1 is characterized in that, the frequency of the induced voltage of Test coil is 2 times of reciprocating frequency of movable piece.
3. electromagnetic pump as claimed in claim 1 is characterized in that, comes the flow of testing pump according to the detected induced voltage of Test coil.
4. electromagnetic pump as claimed in claim 1 is characterized in that, carries out the drive controlling of movable piece according to the induced voltage of Test coil.
5. as each described electromagnetic pump in the claim 1 to 4, it is characterized in that the induced voltage to Test coil in the equable detection range of the induced voltage that the excitation by electromagnetic coil causes detects.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP285245/2003 | 2003-08-01 | ||
| JP2003285245A JP4570343B2 (en) | 2003-08-01 | 2003-08-01 | Electromagnetic pump |
| PCT/JP2004/011048 WO2005012727A1 (en) | 2003-08-01 | 2004-08-02 | Electromagnetic pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1846062A CN1846062A (en) | 2006-10-11 |
| CN1846062B true CN1846062B (en) | 2010-09-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2004800255397A Active CN1846062B (en) | 2003-08-01 | 2004-08-02 | Electromagnetic pump |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20060239842A1 (en) |
| JP (1) | JP4570343B2 (en) |
| CN (1) | CN1846062B (en) |
| WO (1) | WO2005012727A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8007247B2 (en) * | 2007-05-22 | 2011-08-30 | Medtronic, Inc. | End of stroke detection for electromagnetic pump |
| CN102506950B (en) * | 2011-11-07 | 2013-06-05 | 中国科学院自动化研究所 | Device for detecting free flow and back pressure flow of electromagnetic pump and detection method |
| CN102562553A (en) * | 2012-03-01 | 2012-07-11 | 深圳华星恒泰泵阀有限公司 | Electromagnetic water pump and output flow control method thereof |
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| JP3931487B2 (en) * | 1999-06-25 | 2007-06-13 | 松下電工株式会社 | Drive control method for linear vibration motor |
| JP2001224158A (en) * | 2000-02-08 | 2001-08-17 | Twinbird Corp | Electromagnetic reciprocal drive mechanism |
| JP2003083257A (en) * | 2001-07-03 | 2003-03-19 | Techno Takatsuki Co Ltd | Electromagnetic vibration type pump |
-
2003
- 2003-08-01 JP JP2003285245A patent/JP4570343B2/en not_active Expired - Lifetime
-
2004
- 2004-08-02 US US10/566,470 patent/US20060239842A1/en not_active Abandoned
- 2004-08-02 WO PCT/JP2004/011048 patent/WO2005012727A1/en active Application Filing
- 2004-08-02 CN CN2004800255397A patent/CN1846062B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2529552B2 (en) * | 1986-07-18 | 1996-08-28 | 株式会社 長野計器製作所 | Control device for electromagnetic reciprocating pump |
| JP3363931B2 (en) * | 1993-01-07 | 2003-01-08 | ティーディーケイ株式会社 | Moving magnet pump |
Non-Patent Citations (4)
| Title |
|---|
| JP昭54-85404U 1979.06.16 |
| JP昭61-37466B2 1986.08.23 |
| JP特开2001-16892A 2001.01.19 |
| JP特开2001-224158A 2001.08.17 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005054638A (en) | 2005-03-03 |
| JP4570343B2 (en) | 2010-10-27 |
| WO2005012727A1 (en) | 2005-02-10 |
| US20060239842A1 (en) | 2006-10-26 |
| CN1846062A (en) | 2006-10-11 |
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