CN1664367A - Liquid pump - Google Patents
Liquid pump Download PDFInfo
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- CN1664367A CN1664367A CN 200510051734 CN200510051734A CN1664367A CN 1664367 A CN1664367 A CN 1664367A CN 200510051734 CN200510051734 CN 200510051734 CN 200510051734 A CN200510051734 A CN 200510051734A CN 1664367 A CN1664367 A CN 1664367A
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Abstract
This invnetoin provides a fluid pump which has a thin shape preferably applicable to a cooling device for electronic equipment such as a notebook personal computer progressively miniaturized and thinned, and which is excellent in air discharge amount. The fluid pump 1 has a diaphragm 2 and a case body 8 for accommodating the diaphragm 2, wherein the diaphragm 2 is vibratably accommodated inside the case body 8, a pump chamber 3 disposed on one surface 2a of the diaphragm 2 is formed in a part of the case body 8, an intake part 4 and a discharge part 5 communicating with the pump chamber 3 are formed in a position opposed to the diaphragm 2 in the pump chamber 3, the intake part 4 and the discharge part 5 are provided with a check valve type intake valve 6 and a check valve type discharge valve 7 respectively, and the discharge part 5 is arranged closer to the diaphragm 2 than the intake part 4.
Description
Technical field
The present invention relates to be suitable for the fluid pump of structure cooling usefulness, that drive by diaphragm (ダ イ ヤ Off ラ system) of the slim electronic equipments of small volume such as notebook computer.
Background technique
In the past, proposed multiple being attached to by piezoelectric element on the thin plates such as sheet metal and made it integrated formation diaphragm, with the scheme of the diaphragm vibrator type pump of the purpose that reaches miniaturization and as oscillator with PZT and so on.Fig. 6 is the figure (reference example such as patent documentation 1) of a structure example of this diaphragm vibrator type fluid pump of expression.
In fluid pump A shown in Figure 6, tabular piezoelectric vibrators 101 such as the built-in PZT of upper inner at the box housing 100 of hollow, this hollow portion is separated up and down, in Fig. 6, the downside of this piezoelectric vibrator 101 forms space portion 102, form pump chamber 103 at an upper portion thereof, the structure of above-mentioned piezoelectric vibrator 101 can change the volume of pump chamber 103 thus for by switching on along its thickness direction double vibrations.
Upper left-hand at above-mentioned housing 100 forms inlet nozzle 105, form discharge nozzle 106 in upper right, the central part ground that suction passage 107 extends to housing 100 always forms, so that be communicated with above-mentioned inlet nozzle 105, the central part ground that discharge route 108 extends to housing 100 always forms, so that be communicated with above-mentioned discharge nozzle 106.The central part of above-mentioned housing 100 forms the next door, suction side 109 that separates above-mentioned suction passage 107 and pump chamber 103, and the suction passage 111 that formation makes above-mentioned pump chamber 103 be connected with above-mentioned suction passage 107 on this next door, suction side 109, in addition, next door, suction side 109 is provided with the safety check 113 that opens and closes above-mentioned suction passage 111.Equally, formation separates the discharge alar septum 110 of above-mentioned discharge route 108 and pump chamber 103, and on this discharge alar septum 110, form the discharge route 112 that is communicated with above-mentioned pump chamber 103 and above-mentioned discharge route 108, and discharging the safety check 115 that the above-mentioned discharge route 112 of switching is set on the alar septum 110.
In addition, piezoelectric vibrator 101 adopts the structure that applies driving voltage from diagram abridged drive circuit, makes piezoelectric vibrator 101 double vibrationses by applying this driving voltage.
The fluid pump A of structure shown in Figure 6 adopts following structure: the volume that can change pump chamber 103 by piezoelectric vibrator 101 double vibrationses that become diaphragm, make thus through safety check 113 and be sent to discharge nozzle 106 1 sides by safety check 115, by playing the effect of the pump of using as conveyance fluid like this from the fluid that inlet nozzle 105 1 sides are drawn in the pump chamber 103.
The pump that the fluid pump A that above-mentioned patent documentation 1 is put down in writing has used the trickle reciprocating pumping action of piezoelectric vibrator 101 to carry out the conveying of fluid for utilization, compare miniaturization and significantly with the general fluid pump that has utilized mechanisms such as propeller cavitation or piston, but when wanting fluid pump A with structure shown in Figure 6 to be used for mini-plants such as the notebook computer of continuous miniaturization and or portable information device, there is problem limited in the miniaturization.
For example, when the integral thickness of wanting to make fluid pump A is thinner,, there is the problem of the extreme attenuation of upper side that can not make housing 100 though can make the bottom of the housing 100 that is positioned at piezoelectric vibrator 101 downsides thinner.For example, though can make pump chamber 103 attenuation,, therefore can not make pump be thinned to height or thickness above them because its upside exists safety check 113,115 and suction passage 107 and discharge route 108.Promptly, because whole thickness must have piezoelectric vibrator 101, keep the thickness of the segment thickness addition of the segment thickness of the segment thickness of part, pump chamber 103, safety check 113,115 of the housing of this piezoelectric vibrator 101 and inlet nozzle 105 or discharge nozzle 106, therefore exist and to realize that the miniaturization of housing is thinner than the problem of this thickness in fact.
Particularly owing to the safety check of analysing and observe for approximate umbrella shape 113,115 is respectively installed on the next door 109,110 with the form of reversing mutually up and down, head 113a, the 115a of safety check 113,115 is configured in pump chamber 103 1 sides in next door 109,110 and an opposite side thereof respectively, and the distance configuration that piezoelectric vibrator 101 equates is left in next door 109,110, therefore the thickness of housing 100 must form the suitable thickness of thickness with next door 109,110 and head 113a, 115a, and this becomes the biggest obstacle of realization miniaturization.
And, if with pump chamber 103 attenuation, then also there is the extremely low problem of discharge capacity of fluid pump A.
Therefore, when wanting to effectively utilize, preferably make the fluid pump attenuation, but there is the problem of the requirement that can not satisfy these purposes in the past fluid pump shown in Figure 6 as the cooling unit of the notebook computer of continuous miniaturization and or portable information device as far as possible.
[patent documentation 1] Japanese patent laid-open 7-301181 communique (Fig. 2)
Summary of the invention
The present invention is exactly in view of the above problems, and the cooling unit that will provide a kind of electronic equipments such as notebook computer that are used for continuous slimming, miniaturization ideally to use is provided, and fluid pump slim, that discharge capacity is also good.
In order to achieve the above object, the present invention has adopted following structure.
Fluid pump of the present invention is characterised in that, have and utilize piezoelectric element and by the diaphragm of double vibrations with contain the housing of this diaphragm, above-mentioned diaphragm is vibrated the inside that is housed in above-mentioned housing freely under the state that its peripheral part is held, on the part of this housing, form the pump chamber of the one side side that is positioned at above-mentioned diaphragm, above-mentioned pump chamber with the opposed position of above-mentioned diaphragm on form suction portion and the discharge portion communicate with this pump chamber, be provided with the suction valve of check valve-type in above-mentioned suction portion, be provided with the expulsion valve of check valve-type in above-mentioned discharge portion; Above-mentioned discharge portion is configured in the position than the close above-mentioned diaphragm of above-mentioned suction portion.
If employing said structure, by discharge portion being configured in the position near diaphragm than suction portion, can dispose suction valve and expulsion valve mutually abreast, the head that can make suction valve to the bottom, engagement portion of the gap of diaphragm and expulsion valve to the distance in the gap of diaphragm about equally, the width of the pump thickness direction that the two valve portions that therefore can reduce occupy can be realized the slimming of housing.
And, fluid pump of the present invention is above-mentioned fluid pump, it is characterized in that, the next door, suction side that above-mentioned suction portion is formed with the above-mentioned suction valve of supporting and separates above-mentioned pump chamber, be formed with the discharge alar septum that supports above-mentioned expulsion valve and separate above-mentioned pump chamber in above-mentioned discharge portion, above-mentioned discharge alar septum is configured in than the position of next door, above-mentioned suction side near above-mentioned diaphragm.
If employing said structure, be configured in than the position of next door, above-mentioned suction side by discharging alar septum near above-mentioned diaphragm, can dispose suction valve and expulsion valve mutually abreast, the head that can make suction valve to the bottom, engagement portion of the gap of diaphragm and expulsion valve to the distance in the gap of diaphragm about equally, the width of the pump thickness direction that the two valve portions that therefore can reduce occupy can be realized the slimming of housing.
And, fluid pump of the present invention is above-mentioned fluid pump, it is characterized in that, next door, above-mentioned suction side is provided with center hole and is a plurality of through holes radial configuration, the above-mentioned suction of formation portion from this center hole, and above-mentioned suction valve is by the bar-shaped engagement portion in the above-mentioned center hole of insertion and be formed on diaphragm one side of this engagement portion, the discoideus head of the above-mentioned a plurality of through holes of covering constitutes; When above-mentioned discharge alar septum that produces when the position that above-mentioned discharge alar septum is configured in close above-mentioned diaphragm and the height difference between the next door, above-mentioned suction side were D, above-mentioned height difference D was set in the scope below 24% more than 10% of above-mentioned suction valve head radius.
If the employing said structure by height difference D being set in the scope below 24% more than 10% of suction valve head radius, can make the fluid pump attenuation thickness relative with this ratio.In addition, if height difference D less than 10% of head radius, then pump does not have abundant miniaturization, if height difference D surpasses 24% of head radius, then on the contrary because height difference has become ambassador's pump thickening, therefore which kind of situation is all undesirable.
Perhaps, fluid pump of the present invention is characterised in that, have and utilize piezoelectric element and by the diaphragm of double vibrations with contain the housing of this diaphragm, above-mentioned diaphragm is vibrated the inside that is housed in above-mentioned housing freely under the state that its peripheral part is held, on the part of this housing, form the pump chamber of the one side side that is positioned at above-mentioned diaphragm, above-mentioned pump chamber with the opposed position of above-mentioned diaphragm on form suction portion and the discharge portion communicate with this pump chamber, be provided with the suction valve of check valve-type in above-mentioned suction portion, be provided with the expulsion valve of check valve-type in above-mentioned discharge portion; Disposing obliquely near the either party in above-mentioned suction portion or the above-mentioned discharge portion or the central direction of the above-mentioned diaphragm of twocouese.
If the employing said structure makes the pump purpose of thinness by making either party or the both sides' inclination in above-mentioned suction portion or the above-mentioned discharge portion, then can reaching.And, tilt near the central direction of diaphragm by making suction portion and discharge portion, can reduce in the pump chamber, the flow path resistance of the fluid in suction portion and the discharge portion, can improve the efficient of fluid pump.
And, fluid pump of the present invention is above-mentioned fluid pump, it is characterized in that, the next door, suction side that above-mentioned suction portion is formed with the above-mentioned suction valve of supporting and separates above-mentioned pump chamber, be formed with the discharge alar septum that supports above-mentioned expulsion valve and separate above-mentioned pump chamber in above-mentioned discharge portion, disposing obliquely near the either party in next door, above-mentioned suction side and the above-mentioned discharge alar septum or the central direction of the above-mentioned diaphragm of twocouese.
If the employing said structure tilts by the either party or the both sides that make next door, above-mentioned suction side or discharge in the alar septum, can increase the internal volume of pump chamber, improve discharge capacity.
And fluid pump of the present invention is above-mentioned fluid pump, it is characterized in that, either party in next door, above-mentioned suction side and the discharge alar septum or both sides' the angle of inclination with respect to above-mentioned diaphragm are set at more than 20 °.
If the employing said structure makes the pump purpose of thinness by making the angle of inclination more than 20 °, can reaching.In addition, if the slimming of pump less than 20 °, then can not fully be realized in the angle of inclination, if the tilt angle surpasses 45 °, pump thickening on the contrary then.
And fluid pump of the present invention is above-mentioned fluid pump, it is characterized in that, above-mentioned discharge portion is configured in the position than the close above-mentioned diaphragm of above-mentioned suction portion.If employing said structure, by discharge portion being configured in the position near diaphragm than suction portion, can dispose suction valve and expulsion valve mutually abreast, the head that can make suction valve is roughly the same to the distance in the gap of diaphragm to the bottom, engagement portion of the gap of diaphragm and expulsion valve, therefore can reduce the width of the occupied pump thickness direction of two valve portions, can make housing thinner.
If employing the present invention can provide a kind of slim and discharge capacity is also good, can be applicable to the fluid pump in the cooling unit that the electronic equipments such as notebook computer of continuous slimming, miniaturization use.
Description of drawings
Fig. 1 is the profile schema diagram of the fluid pump structure of expression the 1st mode of execution of the present invention.
Fig. 2 be expression the 1st mode of execution of the present invention fluid pump major component overlook ideograph.
Fig. 3 is the profile schema diagram of major component of the fluid pump of expression the 1st mode of execution of the present invention.
Fig. 4 is the profile schema diagram of structure of an example of the fluid pump of expression the 2nd mode of execution of the present invention.
Fig. 5 is the profile schema diagram of other routine structures of the fluid pump of expression the 2nd mode of execution of the present invention.
Fig. 6 is a profile schema diagram of representing fluid pump structure in the past.
Embodiment
The 1st mode of execution
The 1st mode of execution of the present invention is described with reference to the accompanying drawings.The fluid pump of present embodiment is for being configured in discharge portion the pump near diaphragm one side than suction portion.Fig. 1 represents the profile schema diagram of the fluid pump of present embodiment, the major component of the fluid pump of Fig. 2 presentation graphs 1 overlook ideograph.
As shown in Figure 1, the fluid pump 1 of present embodiment roughly is made of diaphragm 2, the pump chamber 3 that is arranged in one side 2a one side of diaphragm 2, suction portion 4 that is arranged on pump chamber 3 and discharge portion 5, the suction valve 6 of check valve-type that is separately positioned on suction portion 4 and discharge portion 5 and expulsion valve 7 and housing 8.Diaphragm 2 is housed in the inside of box-shaped shell 8, and the inside of housing 8 is divided into two by diaphragm 2.And the inner space of the one side 2a side of diaphragm 2 is as pump chamber 3.
Form suction portion 4 and discharge portion 5 with the opposed position of the one side 2a of diaphragm 2 in pump chamber 3, discharge portion 5 is configured in the position near diaphragm 2 than suction portion 4.And, connecting the suction pipe 9 and the discharge tube 10 that make the fluid suction or flow out pump chamber 3 usefulness on suction portion 4 and the discharge portion 5 respectively.Pump chamber 3 is separated by next door, suction side 11 with suction pipe 9, and above-mentioned suction valve 6 is installed on this next door, suction side 11.On the other hand, pump chamber 3 is separated by discharging alar septum 12 with discharge tube 10, and above-mentioned expulsion valve 7 is installed on this discharge alar septum 12.
In the fluid pump 1 of present embodiment, suction valve 6 by above-mentioned check valve-type and expulsion valve 7 suck fluid in the pump chambers 3 from suction portion 4, and with fluid outside discharge portion 5 is discharged to pump chamber 3, fluid can oppositely not sucked or discharge.So, can to ground fluid be carried to discharge tube 10 through pump chamber 3 from suction pipe 9 by folk prescription.
The preferred used thickness of vibrating plate 2b that constitutes diaphragm 2 is the sheet metals such as stainless steel of 0.05mm～0.3mm.And the preferred used thickness of piezoelectrics 2c, 2c is the PZT of 0.2～0.5mm etc.And, can adopt resin or metal etc. as the material of above-mentioned framework 8.And can on the inwall of pump chamber 3, form protective film according to the kind of fluid.
Describe suction portion 4 and discharge portion 5 below in detail.
Suction portion 4 is made of next door, suction side 11 and the suction valve 6 that is installed on this next door, suction side 11, and discharge portion 5 constitutes by discharging alar septum 12 and being installed in the expulsion valve 7 of discharging on the alar septum 12.And, discharge alar septum 12 and be configured in than the position of suction side next door 11 near diaphragm 2.So, discharge portion 5 is configured in the position near diaphragm 2 than suction portion 4.
Fig. 2 represents the ideograph of overlooking of suction portion 4 and discharge portion 5, and Fig. 3 represents the profile schema diagram of suction portion 4 and discharge portion 5.As shown in Figures 2 and 3, the next door, suction side 11 of suction portion 4 is provided with center hole 11a, and in the radiation direction of this center hole 11a a plurality of through hole 11b that constitute suction portion 4 is set.And rubber that suction valve 6 usefulness ductilities are high or resin etc. are made, and are formed to analyse and observe to be approximate umbrella shape.That is, suction valve 6 is made of with the discoideus head 6a by diaphragm 2 one sides, a plurality of through hole 11b of covering that is formed on this engagement portion 6b the bar-shaped engagement portion 6b that inserts among the center hole 11a.This suction valve 6 is blocked through hole 11b with head 6a in the ordinary course of things makes it become the state of " closing ".And like that, the head 6a of this suction valve 6 distortion is opened by such through hole 11b when having applied the pressure of fluid, becomes "open" state thus shown in the dot and dash line of Fig. 3.
Equally, on the discharge alar septum 12 of discharge portion 5, be provided with center hole 12a, and be provided with a plurality of through hole 12b that constitute discharge portion 5 in the radiation direction of this center hole 12a.And rubber that expulsion valve 7 usefulness ductilities are high or resin etc. are made, and are formed to analyse and observe to be approximate umbrella shape.That is, expulsion valve 7 is made of with the discoideus head 7a by discharge tube 10 1 sides, a plurality of through hole 12b of covering that is formed on this engagement portion 7b the bar-shaped engagement portion 7b that inserts among the center hole 12a.This expulsion valve 7 is blocked through hole 12b with head 7a in the ordinary course of things makes it become the state of " closing ".And like that, the head 7a of this expulsion valve 7 distortion is opened by such through hole 12b when having applied the pressure of fluid, becomes "open" state thus shown in the dot and dash line of Fig. 3.
And as shown in Figure 3, between suction portion 4 and discharge portion 5, produce height difference D by the position that discharge alar septum 12 is configured near diaphragm 2.The radius r of the head 6a that this height difference D preferably sets at suction valve 6
1The scope below 24% more than 10%.Setting height difference D and radius r as described above
1Relation be because following reason.
Promptly as shown in Figure 3, when the radius that makes head 6a be r
1The time, be engaged to the part on the next door, suction side 11 if consider the peripheral part of head 6a, then the formation position of through hole 11b is that the benchmark radius is 0.88r at the center with center hole 11a
1Circle in the zone.If make the formation position of through hole 11b wideer than this, then a part of subsidence of the head 6a of suction valve is among the through hole 11b.
Then, in order to be 0.88r at this radius
1Circle in the zone engagement portion 6b of center hole 11a and surrounding edge and suction valve 6 is fastened, needing radius is 0.32r
1Circle in the zone.Therefore, in this section through hole 11b can not be set.
So, the maximum diameter of through hole 11b is (0.88r
1-0.32r
1)=0.56r
1If picture is provided with 6 through hole 11b as shown in Figure 3, then its flow path cross sectional area is 6 * (0.56r
1/ 2)
2π.
On the other hand, and when suction valve is "open" state, if suppose that peripheral part and the distance between the next door, suction side 11 of the head 6a of suction valve 6 are t, then suction valve 6 is the outer perimeter of head 6a and the product of clearance t with the area in 11 formed gaps, next door, suction side, is t * 2r therefore
1π.
As long as the maximum area (t * 2r in above-mentioned gap
1π) with the aggregate value (6 * (0.56r of the flow path cross sectional area of through hole
1/ 2)
2π) equal extent just can.Therefore, (t * 2r
1π)≤(6 * (0.56r
1/ 2)
2π), become t≤0.24r
1
If the amount of deformation of the suction valve 6 of the size that makes height difference D when sucking equates apart from t, even D≤0.24r
1, then can and row arrangement suction valve 6 and expulsion valve 7, can reduce the volume that suction portion 4 among the lower shell body 8b and discharge portion 5 are occupied.
As mentioned above, wish to make the radius r of height difference D at head 6a
1Below 24%.And, the size of height difference D can for this peaked about 1/2 to 1/3.Therefore, wish to make the radius r of height difference D at head 6a
1More than 10%.
As mentioned above, the size by making height difference D is in the radius r of head 6a
1More than 10% below 24%, can reduce to constitute the lower shell body 8b of pump, can reach and make fluid pump 1 purpose of thinness.In addition, if height difference D less than 10% of the radius of head, then pump does not have abundant miniaturization, if height difference D surpass head 6a radius 24%, then on the contrary because height difference has become ambassador's pump thickening, therefore which kind of situation is all undesirable.
If adopt above-mentioned fluid pump 1, then because by discharge portion 5 being configured in the position near diaphragm 2 than suction portion 4, can dispose suction valve 6 and expulsion valve 7 mutually abreast, the head 6a that can make suction valve 6 to the bottom, engagement portion of the gap of diaphragm 2 and expulsion valve 7 to the distance in the gap of diaphragm 2 about equally, therefore the width of the occupied pump thickness direction of two valve portions 6,7 can be reduced, the slimming of housing 8 can be realized.
The 2nd mode of execution
The following describes the fluid pump 21 of the 2nd mode of execution of the present invention.The fluid pump of present embodiment is the pump that discharge portion and suction portion are set obliquely with diaphragm.Fig. 4 represents the profile schema diagram of the fluid pump of present embodiment.In constituting component shown in Figure 4, add the identical reference character to Fig. 3 mark with Fig. 1 with Fig. 1 to the identical constituting component of the constituting component of the fluid pump of the 1st mode of execution shown in Figure 3 in addition, it illustrates omission.
As shown in Figure 4, the fluid pump 21 of present embodiment roughly is made of diaphragm 2, the pump chamber 23 that is arranged in the one side 2a side of diaphragm 2, suction portion 24 that is arranged on pump chamber 23 and discharge portion 25, the suction valve 26 of check valve-type that is separately positioned on suction portion 24 and discharge portion 25 and expulsion valve 27 and housing 28.Diaphragm 2 is housed in the inside of the housing 28 of case shape, and the inside of housing 28 is divided into two by diaphragm 2.And the inner space of the one side 2a side of diaphragm 2 is as pump chamber 23.
Forming suction portion 24 and discharge portion 25 with the opposed position of the one side 2a of diaphragm 2, discharge portion 25 is configured in the position near diaphragm 2 than suction portion 24.And suction portion 24 and discharge portion 25 tilt to the central direction of diaphragm 2.Connecting respectively on suction portion 24 and the discharge portion 25 and making fluid suck or discharge the suction pipe 9 and the discharge tube 10 of pump chamber 23 usefulness.Pump chamber 23 is separated by next door, suction side 21 with suction pipe 9, and above-mentioned suction valve 26 is installed on this next door, suction side 21.And pump chamber 23 is separated by discharging alar septum 22 with discharge tube 10, and above-mentioned expulsion valve 27 is installed on this discharge alar septum 22.
And the peripheral part 2d of above-mentioned diaphragm 2 is configured the upper shell 28a and the lower shell body 28b clamping of housing 28, and vibration is in this state freely received and held in housing 28.
Describe suction portion 24 and discharge portion 25 below in detail.
And as shown in Figure 4, next door, suction side 21 and diaphragm 2 between angle be more than 20 ° in the scope below 45 ° to the center of diaphragm 2 lopsidedness.Equally, discharge alar septum 22 also and diaphragm 2 between angle be more than 20 ° in the scope below 45 ° to the center of diaphragm 2 lopsidedness.If the tilt angle theta 1 of next door, suction side 21 and discharge alar septum 22 and θ 2 then can not obtain the slimming effect of enough pumps less than 20 °.And, if tilt angle theta 1 and θ 2 surpasses 45 °, fluid pump 21 thickening on the contrary then.Make the pump purpose of thinness by tilt angle theta 1 and θ 2 being set in the above-mentioned scope, can reaching.
And, by making next door, suction side 21 and discharging alar septum 22 and near the center of diaphragm 2, tilt, shown in the dot and dash line among Fig. 4, make like that by the fluid in the pump chamber 23 mobile and be mild curve, reduced in the pump chamber 23, the flow path resistance of the fluid in suction portion 24 and the discharge portion 25, can improve the efficient of fluid pump 21.
And, by making next door, suction side 21 and discharging alar septum 22 and tilt, when not tilted, the interior volume specific ratio of pump chamber 23 increases, therefore can improve discharge capacity.
In addition, in the present embodiment, also can only make and discharge alar septum 22 as forming next door, suction side 21 abreast with diaphragm 2 as shown in Figure 5 with respect to diaphragm 2 inclinations.
Mistake as described above like that, if adopt the fluid pump 21 of present embodiment, tilt by making either party or both sides in suction portion 24 or the discharge portion 25, can reach and make fluid pump 21 purpose of thinness.And, tilt near the central direction of diaphragm 2 by making suction portion 24 and discharge portion 25, can reduce in the pump chamber 23, the flow path resistance of the fluid in suction portion 24 and the discharge portion 25, can improve the efficient of fluid pump 21.
And, because discharge portion 25 is configured in the position near diaphragm 2 than suction portion 24, can dispose suction valve 26 and expulsion valve 27 mutually abreast, the head that can make suction valve 26 to the bottom, engagement portion of the gap of diaphragm 2 and expulsion valve 27 to the distance in the gap of diaphragm 2 about equally, therefore the width of the occupied pump thickness direction of two valve portions can be reduced, more slimming of housing 28 can be made.
Claims (7)
1. fluid pump, it is characterized in that, have and utilize piezoelectric element and by the diaphragm of double vibrations with contain the housing of this diaphragm, above-mentioned diaphragm is vibrated the inside that is housed in above-mentioned housing freely under the state that its peripheral part is held, on the part of this housing, form the pump chamber of the one side side that is positioned at above-mentioned diaphragm, above-mentioned pump chamber with the opposed position of above-mentioned diaphragm on form suction portion and the discharge portion communicate with this pump chamber, be provided with the suction valve of check valve-type in above-mentioned suction portion, be provided with the expulsion valve of check valve-type in above-mentioned discharge portion;
Above-mentioned discharge portion is configured in the position than the close above-mentioned diaphragm of above-mentioned suction portion.
2. fluid pump as claimed in claim 1, it is characterized in that, the next door, suction side that above-mentioned suction portion is formed with the above-mentioned suction valve of supporting and separates above-mentioned pump chamber, be formed with the discharge alar septum that supports above-mentioned expulsion valve and separate above-mentioned pump chamber in above-mentioned discharge portion, above-mentioned discharge alar septum is configured in than the position of next door, above-mentioned suction side near above-mentioned diaphragm.
3. fluid pump as claimed in claim 2, it is characterized in that, next door, above-mentioned suction side is provided with center hole and is a plurality of through holes radial configuration, the above-mentioned suction of formation portion from this center hole, and above-mentioned suction valve is by the bar-shaped engagement portion in the above-mentioned center hole of insertion and be formed on diaphragm one side of this engagement portion, the discoideus head of the above-mentioned a plurality of through holes of covering constitutes; When above-mentioned discharge alar septum that produces when the position that above-mentioned discharge alar septum is configured in close above-mentioned diaphragm and the height difference between the next door, above-mentioned suction side were D, above-mentioned height difference D was set in the scope below 24% more than 10% of above-mentioned suction valve head radius.
4. fluid pump, it is characterized in that, have and utilize piezoelectric element and by the diaphragm of double vibrations with contain the housing of this diaphragm, above-mentioned diaphragm is vibrated the inside that is housed in above-mentioned housing freely under the state that its peripheral part is held, on the part of this housing, form the pump chamber of the one side side that is positioned at above-mentioned diaphragm, above-mentioned pump chamber with the opposed position of above-mentioned diaphragm on form suction portion and the discharge portion communicate with this pump chamber, be provided with the suction valve of check valve-type in above-mentioned suction portion, be provided with the expulsion valve of check valve-type in above-mentioned discharge portion;
Disposing obliquely near the either party in above-mentioned suction portion or the above-mentioned discharge portion or the central direction of the above-mentioned diaphragm of twocouese.
5. fluid pump as claimed in claim 4, it is characterized in that, the next door, suction side that above-mentioned suction portion is formed with the above-mentioned suction valve of supporting and separates above-mentioned pump chamber, be formed with the discharge alar septum that supports above-mentioned expulsion valve and separate above-mentioned pump chamber in above-mentioned discharge portion, disposing obliquely near the either party in next door, above-mentioned suction side and the above-mentioned discharge alar septum or the central direction of the above-mentioned diaphragm of twocouese.
6. fluid pump as claimed in claim 5 is characterized in that, either party in next door, above-mentioned suction side and the discharge alar septum or both sides' the angle of inclination with respect to above-mentioned diaphragm are set at more than 20 °.
7. as any one the described fluid pump in the claim 4 to 6, it is characterized in that above-mentioned discharge portion is configured in the position than the close above-mentioned diaphragm of above-mentioned suction portion.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004056106A JP4383207B2 (en) | 2004-03-01 | 2004-03-01 | Fluid pump |
| JP056106/2004 | 2004-03-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1664367A true CN1664367A (en) | 2005-09-07 |
| CN100427758C CN100427758C (en) | 2008-10-22 |
Family
ID=35029450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100517343A Expired - Fee Related CN100427758C (en) | 2004-03-01 | 2005-03-01 | Liquid pump |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4383207B2 (en) |
| CN (1) | CN100427758C (en) |
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| CN110001203A (en) * | 2017-12-22 | 2019-07-12 | 东芝泰格有限公司 | Diaphragm pump, liquid circulation component and liquid ejection apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4805658B2 (en) | 2005-11-09 | 2011-11-02 | 日東工器株式会社 | Pump using unimorph diaphragm |
| TWI437165B (en) | 2008-08-04 | 2014-05-11 | Chao Fou Hsu | Structural improvement of piston valve body for diaphragm booster |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3460301B2 (en) * | 1994-05-02 | 2003-10-27 | 東ソー株式会社 | Piezo pump |
| JP2002106470A (en) * | 2000-09-29 | 2002-04-10 | Matsushita Electric Works Ltd | Diaphragm pump |
| CN2580141Y (en) * | 2002-09-03 | 2003-10-15 | 吉林大学 | Multiple cavity piezoelectric membrane driving pump |
| CN1410674A (en) * | 2002-11-29 | 2003-04-16 | 张建辉 | Piezoelectric pump having new type high frequency valve |
-
2004
- 2004-03-01 JP JP2004056106A patent/JP4383207B2/en not_active Expired - Fee Related
-
2005
- 2005-03-01 CN CNB2005100517343A patent/CN100427758C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101495755B (en) * | 2006-07-25 | 2010-11-03 | 松下电工株式会社 | Diaphragm pump |
| CN101986787A (en) * | 2008-03-14 | 2011-03-16 | 技术合伙公司 | Pump |
| CN103867429A (en) * | 2012-12-07 | 2014-06-18 | 胡军 | Novel valve body and piezoelectric pump with same |
| CN103867429B (en) * | 2012-12-07 | 2016-10-26 | 胡军 | A kind of valve body and there is the piezoelectric pump of this valve body |
| CN103321881A (en) * | 2013-06-19 | 2013-09-25 | 重庆中镭科技有限公司 | Piezoelectric pump vibrator with multiaxial fiber-reinforced resin gasket |
| CN108215492A (en) * | 2016-12-22 | 2018-06-29 | 东芝泰格有限公司 | Liquid circulation module, liquid ejection apparatus and liquid ejection method |
| CN110001203A (en) * | 2017-12-22 | 2019-07-12 | 东芝泰格有限公司 | Diaphragm pump, liquid circulation component and liquid ejection apparatus |
| CN114876777A (en) * | 2017-12-22 | 2022-08-09 | 株式会社村田制作所 | Pump and method of operating the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005248713A (en) | 2005-09-15 |
| CN100427758C (en) | 2008-10-22 |
| JP4383207B2 (en) | 2009-12-16 |
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