CN103223389A - Piezoceramic ultrasonic atomizer - Google Patents
Piezoceramic ultrasonic atomizer Download PDFInfo
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- CN103223389A CN103223389A CN2013101134598A CN201310113459A CN103223389A CN 103223389 A CN103223389 A CN 103223389A CN 2013101134598 A CN2013101134598 A CN 2013101134598A CN 201310113459 A CN201310113459 A CN 201310113459A CN 103223389 A CN103223389 A CN 103223389A
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- metallic membrane
- piezoelectric ceramics
- atomizer
- orifice
- raised zones
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Abstract
The invention discloses a piezoceramic atomizer. The piezoceramic atomizer comprises a metallic membrane and a piezoceramic ring piece which are connected, wherein the surface of the piezoceramic ring piece is covered with a conducting medium layer; a through hole is formed in the center of the piezoceramic ring piece; a group of atomizing holes are formed in an area where the metallic membrane corresponds to the through hole; at least one bulged area is formed in the area of one surface, provided with the atomizing holes and facing to the piezoceramic ring piece, of the metallic membrane; and the surface of the first bulged area is in a convex type closed curve. According to the piezoceramic atomizer, the metallic membrane is adopted, double surfaces of a microporous area of the metallic membrane are provided with bulged areas, and the bulged quantity of a bulged body adopting the special structure is matched with deformation and an amplitude variation relation during working of the metallic membrane, so that deformation and amplitude of each area of the metallic membrane obtain reasonable and effective compensation; and meanwhile, the fatigue damage of the metallic membrane is reduced, the service life of the atomizer is prolonged, deformation and amplitude of the metallic membrane are improved, and the atomizing effect of the atomizer is enhanced.
Description
Technical field
The present invention relates to a kind of atomizer that liquid is atomized of being used for, the atomizer that particularly a kind of sharp piezoelectric ceramics atomizes.
Background technology
Atomizer is usually used in the atomizing of humidification in the daily life, clinical medicine, and atomizer is usually by metallic membrane that is provided with the atomizing micropore and piezoelectric ceramic ring bonding in the prior art.After atomizer powers up, the vibration of piezoelectric ceramic ring radial expansion drives metallic membrane and does flexural vibrations, the flexural vibrations of metallic membrane have changed the shape of tapered orifice, form a relative compression and diastole process, drive the transmission of liquid, and constantly have fine droplet to produce at the miner diameter end of bellmouth, realize the atomizing of liquid fluid driving, carrying and liquid.
The normal taper orifice that adopts as shown in Figure 1 of atomizer in the prior art, described taper orifice angle is θ.Suppose that now liquid is from micropore bigger diameter end d
2Flow to miner diameter end d
1The time flow resistance coefficient be ξ
1Liquid is from micropore miner diameter end d
1Flow to bigger diameter end d
2The time flow resistance coefficient be ξ
2Fig. 2 is bellmouth flow resistance coefficient ξ
1, ξ
2With the relation curve of tapered micro holes angle theta, from figure, can get taper atomizing micropore and have an atomizing dead band, its angle theta
1Scope is roughly (20
0＜θ 1＜30
0), taper orifice angle is less than the dead band angle theta
1The time, flow resistance coefficient ξ
1Greater than ξ
2The micropore angle is greater than atomizing dead band angle theta
1The time, flow resistance coefficient ξ
1Greater than ξ
2Adopt the micropore angle greater than atomizing dead band angle theta among the present invention
1The taper orifice, i.e. bigger diameter end face d
2Be liquid-inlet, bigger diameter end face d
1Be atomizing ejection face.
Fig. 3 is for the patent No. is 201120400121.7, name is called the atomizing piece cross-sectional view that the Chinese utility model patent of " a kind of metal atomization sheet " discloses, and comprises metallic membrane 31, piezoelectric ceramic piece 32 metal level 34 attached to easy conductive on the piezoelectric ceramics surface.It is characterized in that: described piezoelectric ceramic piece 32 is designed to ring bodies, described metallic membrane 31 is installed on the area of the bottom area of piezoelectric ceramic piece 32 greater than piezoelectric ceramic piece 32, the thickness of described metallic membrane 31 is 0.02mm ~ 0.06mm, and metallic membrane 31 centers are provided with miniature porose area.The atomizing piece of this structure adopts planar metal diaphragm 31 and piezoelectric ceramic piece 32 bondings, remains on the service behaviour in certain defective.At first, the metallic membrane 31 of this structure is under dither (radially or along circumferentially stretching vibration) operating mode, planar metal diaphragm 31 produces protuberance and collapse-deformation because of the tension and compression of piezoelectric ceramic piece 32, in order to overcome the resistance that metal produces because of distortion, the distortion of metallic membrane and amplitude are to have reducing to a certain degree.Second, the deflection and the amplitude amount maximum in metallic membrane micropore district center zone are the trend of successively decreasing to fringe region, the energy that vibration wave produces is understood a large amount of central areas that concentrates on, and cause only a part of micropore operate as normal of central area, and the micropore of fringe region is in half duty.Liquid by the fringe region micropore atomization is owing to can not get sufficient transmission energy, stagnate and on the metallic membrane surface, form drop so liquid can not spray at a distance outward, hinder the atomizing of follow-up liquid, reduce the actual atomizing area of atomizing piece, influence the atomization of atomizing piece.
Fig. 4 is the patent No. is 201110040361.5, name is called the atomizing piece that the Chinese invention patent of " spray holes and use its atomizing component " discloses floor map.The atomizing component of this structure has been invented a kind of novel spray nozzle sheet at the existing in prior technology defective.It is characterized in that: the spray nozzle sheet single face is provided with a plurality of protrusions 44 and a plurality of atomizing micropore 45, a plurality of protrusions 44 are non-circular and protrude out towards the direction of this piezoelectricity ring plate 42 protuberance, and form the multi-face structure of the radial or annular arrangement of a particular geometric modelling pattern.Though the spray nozzle sheet of this invention can enlarge the atomizing zone, reduce the fatigue damage rate of spray nozzle sheet, but spray nozzle sheet adopts and to assume diamond in shape, ellipse, triangle, hourglass type, falcate or heart-shaped protrusion 44, and unusual deflection, the amplitude variations during with metallic membrane 41 vibrations of the dome shape of this kind structure concerns to be disagreed.Therefore, the zone that deflection is big on the metallic membrane 41 can not get deformation-compensated fully, the zone that deflection is little causes the local deformation amount excessive owing to excessive deformation compensates, the protrusion 44 of this kind structure does not reasonably carry out deformation-compensated to metallic membrane, further accelerate the fatigue damage of spray nozzle sheet, the service life of reducing atomizing.Secondly, the spray nozzle sheet of this structure only is provided with protrusion 44 at metallic membrane 1 single face, so have only half work period to obtain the deformation-compensated of protrusion 44 during spray nozzle sheet cyclomorphosis, and half period is deformation-compensated owing to arriving in addition, cause to expend the distortion that more energy overcomes metallic membrane, influence the atomization of atomizing piece.
Atomizing piece of the prior art often adopts single face to be provided with the metallic membrane and the piezoelectric ceramic ring bonding of protrusion, deflection, amplitude variations relation when the spray nozzle sheet of this structure is provided with the structural form of protrusion and metallic membrane vibration do not match deformation-compensated skewness.Simultaneously, metallic membrane only single face is provided with protrusion, and it is deformation-compensated to guarantee that the whole distortion cycle of metallic membrane obtains, and needs more energy to participate in the actual atomizing of atomizer.So the atomizer that present stage uses, the very easily fatigue damage of its atomizer, capacity usage ratio atomization low, atomizer are poor.
Summary of the invention
Technical problem
The technical problem to be solved in the present invention provides a kind of piezoelectric ceramics atomizer, and this atomizer adopts the metallic membrane of special construction, improves the service life of atomizer, promotes the atomizing effect of atomizer.
Technical scheme
In order to solve above-mentioned technical problem, the piezoelectric ceramics atomizer of a kind of scheme provided by the invention is made up of metallic membrane that is connected and piezoelectric ceramics ring plate, described piezoelectric ceramics ring plate surface coverage has the conducting medium layer, describedly can be easy conductive media such as gold, silver, copper attached to conductive layer on the piezoelectric ceramics surface; In the middle of the described piezoelectric ceramics ring plate is through hole, the corresponding zone of metallic membrane and through hole is provided with one group of orifice, described orifice is a bellmouth, described metallic membrane is provided with at least one first raised zones in the piezoelectric ceramics ring plate simultaneously is provided with the zone of orifice, the described first raised zones surface is the male type closed curve.
Further, described metallic membrane deviates from the zone that the piezoelectric ceramics ring plate simultaneously is provided with orifice and is provided with at least one second raised zones, and the described second raised zones surface is the male type closed curve.
Further, described at least one first raised zones and at least one second raised zones are the central shaft symmetrical structure.
Further, at least one that state first raised zones and at least one second raised zones distribute with the center circular array that metallic membrane is provided with the orifice zone.
Further, described orifice is the taper orifice.
Usually, the area of described piezoelectric ceramics ring plate inner via hole has atomizing micropore district area greater than metallic membrane, and atomizing micropore district is in the scope that through hole contains, to help the ejection of atomized liquid.
Described raised zones surface is the male type closed curve to make the profile of raised zones be similar to raindrop, oil droplet, drop partly to cut open shape, and the maximum end of the protrusion amount of this bossy body is arranged in micropore district deflection and amplitude maximum region; Protrusion amount smallest end is arranged in micropore district deflection and amplitude Minimum Area, and maximum protrusion amount compensates the maximum deformation quantity place, and minimum protrusion amount compensates the least amount of deformation place.
Described metallic membrane also can adopt the two-sided scheme that is provided with raised zones, when metallic membrane by bellmouth micropore miner diameter end towards bigger diameter end face when distortion protuberance, obtain the deformation-compensated of on bellmouth micropore bigger diameter end face raised zones; When metallic membrane by bellmouth micropore bigger diameter end towards path end face when distortion protuberance, obtain from go out the deformation-compensated of zone to bellmouth micropore path end face epirelief.
Further, under the condition of structure that does not influence atomizer and service behaviour, the number of the two-sided raised zones that is provided with in described micropore district should be as far as possible many and at least more than or equal to 2 natural number, can certainly according to reality and decide.
The present invention also provides the piezoelectric ceramics atomizer of another kind of similar scheme, it is made up of metallic membrane that is connected and piezoelectric ceramics ring plate, electroceramics ring plate surface coverage has the conducting medium layer, in the middle of the described piezoelectric ceramics ring plate is through hole, the corresponding zone of metallic membrane and through hole is provided with one group of orifice, described orifice is a bellmouth, described metallic membrane is provided with at least one first projection unit in the piezoelectric ceramics ring plate simultaneously is provided with the zone of orifice, the described first protruding unit is made up of one group of raised zones that circular array distributes, and described raised zones surface is the male type closed curve.Described raised zones surface is the male type closed curve to make the profile of raised zones be similar to raindrop, oil droplet, drop partly to cut open shape.
Beneficial effect
Atomizer of the present invention has adopted the two-sided metallic membrane that respectively is provided with raised zones in micropore district, because deflection, the amplitude variations relation of the protrusion amount of the bossy body of this special construction during with metallic membrane work matches, so each regional deflection of metallic membrane, amplitude obtain rational and effective and compensate.Therefore increase deflection, the amplitude of fringe region micropore, made fringe region part micropore operate as normal, increased the actual atomizing area of atomizer.Simultaneously, two-sided equally spaced evenly distributed several male type closed curve bossy bodies that replace in micropore district have guaranteed that the whole vibration period of metallic membrane all can obtain deformation-compensated from bossy body.Import under the constant prerequisite of gross energy at atomizer, make more energy participate in actual atomizing.Atomizer has reduced the fatigue damage of metallic membrane among the present invention, has improved the service life of atomizer, has promoted the deflection and the amplitude of metallic membrane, has strengthened the atomizing effect of atomizer.
Description of drawings
Fig. 1 is the atomizing micropore cross-sectional view of prior art atomizer;
Fig. 2 is the schematic diagram that concerns of prior art atomizer orifice and micropore angle;
Fig. 3 is the cross-sectional view of a kind of atomizer in the prior art;
Fig. 4 is the cross-sectional view of another atomizer in the prior art;
Fig. 5 is the piezoelectric ceramics atomizer structure schematic diagram of one embodiment of the invention, the floor map of the male type closed curve bossy body of employing;
Fig. 6 has the generalized section of raised zones optional position;
Fig. 7 is the overall structure schematic diagram of piezoelectric ceramics atomizer of the present invention;
Fig. 8 is the first embodiment schematic diagram of piezoelectric ceramics atomizer of the present invention;
Fig. 9 is the second embodiment schematic diagram of piezoelectric ceramics atomizer of the present invention;
Figure 10 is the 3rd embodiment schematic diagram of piezoelectric ceramics atomizer of the present invention.
The specific embodiment
The present invention is described further below in conjunction with accompanying drawing.
Embodiment one:
As Fig. 5, Fig. 6 and shown in Figure 7, the piezoelectric ceramics atomizer of present embodiment is made up of metallic membrane 71 that is connected and piezoelectric ceramics ring plate 72, described piezoelectric ceramics ring plate 72 surface coverage have conducting medium layer 78, in the middle of the described piezoelectric ceramics ring plate 72 is through hole 77, metallic membrane 71 is provided with one group of orifice with through hole 77 corresponding zones, described metallic membrane 71 is provided with the zone 77 of orifice towards piezoelectric ceramics ring plate 72 one sides, described micropore district 73 is provided with several to bellmouth micropore 76, be provided with at least one first raised zones 75 in the described zone 77 that is provided with orifice, the described first raised zones surface is the male type closed curve.As shown in Figure 7, the one side that described metallic membrane 71 deviates from piezoelectric ceramics ring plate 72 is provided with and is provided with second raised zones 74 at least in the zone of orifice, the described second raised zones surface is the male type closed curve, and promptly described micropore district 73 is provided with several to the male type closed curve bossy body 75 of the path end face 731 of bellmouth micropore 76 and be provided with several male type closed curve bossy bodies 74 to the bigger diameter end face 732 of bellmouth micropore 76.The conducting medium of described conducting medium layer 78 can be easy conductive media such as gold, silver, copper.
As shown in Figure 5, the shape of described first raised zones 75 and second raised zones 74 is all the sharp-pointed excessive bossy body 51 that do not have of male type closed curve composition, its surface smoothing fairing, geometry, size are not undergone mutation and about the y axial symmetry, can certainly be for about the axisymmetric symmetric body of x, profile is similar to raindrop, oil droplet, drop and partly cuts open shape, and the generalized section of its optional position as described in Figure 6.The protrusion amount of described bossy body 51 is by y
1End is to y
2End increases gradually, the thickness t and the peak swing A of bossy body 51 largest contours height h and metallic membrane (71)
MaxBetween following relation arranged:
Wherein, the maximum end of male type closed curve bossy body 51 protrusion amounts (y
2End) is arranged in micropore district deflection and amplitude maximum region, protrusion amount smallest end (y
1End) be arranged in micropore district deflection and amplitude Minimum Area, deflection and stress amplitude variation tendency when the distribution attitude should be vibrated with atomizer are consistent.
Wherein, the employing of the piezoelectric ceramics atomizer in present embodiment angle is θ (40
0＜θ＜50
0) taper orifice 76, bellmouth 76 end diameter d
1Be (5um＜d
1＜10um), bellmouth orifice 76 outside diameter d
2Be (45um＜d
2＜70um), micropore district 73 diameter D are (4.0mm＜D＜6.0mm), atomizing micropore district 73 thickness t are (50um＜t on the metallic membrane 1＜70um), micropore district 73 is provided with 2000 ~ 3000 taper orifices 76, and the tapered micro holes 76 bigger diameter end gross areas all in the micropore district 73 account for 30% ~ 40% of micropore district 73 areas, and wherein metallic membrane 71 adopts the good materials of plasticity such as copper, aluminium.Certainly, also can need to change the quantity of orifice 76 in the structural parameters of taper orifice 76 and the micropore district 73 according to reality atomizing.
Embodiment two:
As shown in Figure 8, the atomizer of present embodiment is made up of piezoelectric ceramics ring plate 82 and metallic membrane 81, wherein atomizer micropore district 83 is provided with six male type closed curve bossy bodies, wherein three male type closed curve bossy bodies 84 are distributed in micropore district 83 to tapered micro holes 86 path end faces, and other three male type closed curve bossy bodies 85 are distributed in micropore district 83 to tapered micro holes 86 bigger diameter end faces.Described micropore district 83 is to tapered micro holes 86 path end faces three the male type closed curve bossy bodies 84 that along the circumferential direction evenly distribute, and circumferencial direction rotates to an angle in described micropore district 83 to tapered micro holes 86 bigger diameter end faces three the male type closed curve bossy bodies 85 that along the circumferential direction evenly distribute.Described male type closed curve bossy body 84 is along the circumferential direction uniformly-spaced alternately evenly distributed with male type closed curve bossy body 85.Also can adopt micropore district 83 to tapered micro holes 86 path end faces and to the tapered micro holes 86 bigger diameter end faces male type closed curve bossy body of two or greater number at interval, equally spacedly replace evenly distributed several male type closed curve bossy bodies.
Embodiment three:
As shown in Figure 9, the atomizer of present embodiment is made up of piezoelectric ceramics ring plate 92 and metallic membrane 91, in atomizer micropore district 93, be provided with four projection units to tapered micro holes 96 path end faces, described projection unit is made up of three bossy bodies 94 that circular array distributes, and described bossy body surface is the male type closed curve.With the structure similar of implementing two, in corresponding projection unit, in tapered micro holes 96 bigger diameter end faces, be provided with and three bossy bodies, 94 spaced three bossy bodies 95 in micropore district 93, each bossy body is also for uniformly-spaced arranging.
Embodiment four:
As shown in figure 10, the atomizer of present embodiment is made up of piezoelectric ceramics ring plate 102 and metallic membrane 101, in atomizer micropore district 103, be taper orifice 106, equidistantly arrange three circle male type closed curve bossy bodies 104 along the center of circle in atomizer micropore district 103, first lap comprises six male type closed curve bossy bodies of arranging according to the distribution attitude among first embodiment; Second circle comprises 12 and along the circumferential direction equidistantly replaces evenly distributed male type closed curve bossy body; The 3rd circle comprises 18 and along the circumferential direction equidistantly replaces evenly distributed male type closed curve bossy body 105.Also can change the number of turns of male type closed curve bossy body in the atomizer micropore district and the number of every circle male type closed curve bossy body according to reality.
Claims (8)
1. piezoelectric ceramics atomizer, form by metallic membrane that is connected and piezoelectric ceramics ring plate, described piezoelectric ceramics ring plate surface coverage has the conducting medium layer, in the middle of the described piezoelectric ceramics ring plate is through hole, the corresponding zone of metallic membrane and through hole is provided with one group of orifice, it is characterized in that described metallic membrane is provided with at least one first raised zones in the piezoelectric ceramics ring plate simultaneously is provided with the zone of orifice, the described first raised zones surface is the male type closed curve.
2. piezoelectric ceramics atomizer as claimed in claim 1, it is characterized in that, described metallic membrane deviates from the zone that the piezoelectric ceramics ring plate simultaneously is provided with orifice and is provided with at least one second raised zones, and the described second raised zones surface is the male type closed curve.
3. piezoelectric ceramics atomizer as claimed in claim 1 or 2, it is characterized in that, the maximum end of described raised zones protrusion amount is arranged in the zone of deflection and amplitude maximum in the zone of orifice, and protrusion amount smallest end is arranged in the zone of deflection and amplitude minimum in the zone of orifice.
4. piezoelectric ceramics atomizer as claimed in claim 1 or 2 is characterized in that, described at least one first raised zones and at least one second raised zones are the central shaft symmetrical structure.
5. piezoelectric ceramics atomizer as claimed in claim 3 is characterized in that, described at least one first raised zones and at least one second raised zones distribute with the center circular array that metallic membrane is provided with the orifice zone.
6. piezoelectric ceramics atomizer as claimed in claim 1 is characterized in that, described orifice is the taper orifice.
7. piezoelectric ceramics atomizer, form by metallic membrane that is connected and piezoelectric ceramics ring plate, described piezoelectric ceramics ring plate surface coverage has the conducting medium layer, in the middle of the described piezoelectric ceramics ring plate is through hole, the corresponding zone of metallic membrane and through hole is provided with one group of orifice, described orifice is a bellmouth, it is characterized in that, described metallic membrane is provided with at least one first projection unit in the piezoelectric ceramics ring plate simultaneously is provided with the zone of orifice, described first projection unit is made up of one group of raised zones that circular array distributes, and described raised zones surface is the male type closed curve.
8. piezoelectric ceramics atomizer as claimed in claim 6 is characterized in that, described orifice is the taper orifice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101134598A CN103223389A (en) | 2013-04-02 | 2013-04-02 | Piezoceramic ultrasonic atomizer |
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|---|---|---|---|
| CN2013101134598A CN103223389A (en) | 2013-04-02 | 2013-04-02 | Piezoceramic ultrasonic atomizer |
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Cited By (5)
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| CN105177530A (en) * | 2014-05-28 | 2015-12-23 | 王长津 | Preparation method of microporous atomizing sheet, microporous atomizing sheet and microporous atomization device |
| CN109091374A (en) * | 2018-08-22 | 2018-12-28 | 南京新生医疗科技有限公司 | A kind of herbal fumigation care instrument for hair nursing |
| CN109261428A (en) * | 2018-11-05 | 2019-01-25 | 东莞市谦合电子有限公司 | A kind of piezoelectric ceramic atomizer patch |
| CN114130605A (en) * | 2021-11-12 | 2022-03-04 | 深圳市轴心压电技术有限公司 | Sheet piezoelectric ceramic extrusion injection valve |
| CN115400505A (en) * | 2022-09-29 | 2022-11-29 | 常州大学 | Demisting blade based on secondary entrainment suppressor |
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| CN115400505B (en) * | 2022-09-29 | 2023-08-22 | 常州大学 | Demisting blade based on secondary entrainment inhibitor |
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Application publication date: 20130731 |