EP3306090B1 - Pompe à air en céramique piézoélectrique et son procédé de fabrication - Google Patents

Pompe à air en céramique piézoélectrique et son procédé de fabrication Download PDF

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Publication number
EP3306090B1
EP3306090B1 EP16887181.2A EP16887181A EP3306090B1 EP 3306090 B1 EP3306090 B1 EP 3306090B1 EP 16887181 A EP16887181 A EP 16887181A EP 3306090 B1 EP3306090 B1 EP 3306090B1
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EP
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Prior art keywords
piezoelectric ceramic
air inlet
air
pump
pump body
Prior art date
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EP16887181.2A
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German (de)
English (en)
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EP3306090A1 (fr
EP3306090A4 (fr
Inventor
Tiansheng WEI
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Shenzhen Xingrisheng Ind Co Ltd
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Shenzhen Xingrisheng Ind Co Ltd
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Classifications

    • 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
    • F04B45/00—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids
    • F04B45/04—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having plate-like flexible members, e.g. diaphragms
    • F04B45/043—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having plate-like flexible members, e.g. diaphragms two or more plate-like pumping flexible members in parallel
    • 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
    • F04B45/00—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids
    • F04B45/04—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having plate-like flexible members, e.g. diaphragms
    • F04B45/047—Pumps having electric drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2205/00—Fluid parameters
    • F04B2205/01—Pressure before the pump inlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2205/00—Fluid parameters
    • F04B2205/09—Flow through the pump
    • 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
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/025—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms two or more plate-like pumping members in parallel
    • 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
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/04—Pumps having electric drive
    • F04B43/043—Micropumps
    • F04B43/046—Micropumps with piezoelectric drive
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/1037—Flap valves
    • F04B53/1047—Flap valves the valve being formed by one or more flexible elements
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/22—Arrangements for enabling ready assembly or disassembly

Definitions

  • the present invention relates to variable displacement hydraulic pumps, and in particular, relates to an air pump in which an alternating current power drives a piezoelectric ceramic sheet to vibrate.
  • WO 2007/086296 A1 discloses a diaphragm pump having an inlet valve element and an outlet valve element, whereby each valve element is provided separately and is separately inserted into a pump body to form an inlet valve and an outlet valve, respectively.
  • the present invention provides a design solution of a highly efficient and small-sized piezoelectric ceramic air pump.
  • the piezoelectric ceramic air pump comprises: a pump body, a piezoelectric ceramic crystal diaphragm, and air inlet and output valves; wherein the piezoelectric ceramic crystal diaphragm is co-central-axially mounted on the pump body to construct a working pump chamber for the piezoelectric ceramic air pump; the pump body is approximately tubular, with the diameter being much greater than the axial length, and air inlet and outlet ports configured to communicate the working pump chamber with an external air passage are arranged at a position of a peripheral wall of the pump body; and the air inlet and output valves are mounted at the position of the air inlet and outlet ports.
  • piezoelectric ceramic air pump only one piezoelectric ceramic crystal diaphragm is mounted, and the piezoelectric ceramic crystal diaphragm is fitted and fixed onto the pump body via a lower pump cover, and seals and encloses the pump body to construct the working pump chamber.
  • two piezoelectric ceramic crystal diaphragms including upper and lower piezoelectric ceramic crystal diaphragms are mounted; wherein the upper and lower piezoelectric ceramic crystal diaphragms are respectively fitted and fixed onto inner sides of upper and lower parts of the pump body via upper and lower pump cover; and the upper and lower piezoelectric ceramic crystal diaphragms are coaxially oppositely arranged on an outer surface of a metal substrate thereof, and seal and enclose the pump body to construct the shared working pump chamber.
  • the air inlet and outlet ports are adjacently or non-adjacently arranged on the peripheral wall on one side of the pump body, or the air inlet and outlet ports are oppositely arranged on peripheral walls at two ends of a diameter line of the pump body.
  • the piezoelectric ceramic air pump further comprises an air inlet and outlet component configured to respectively laminate the air inlet and outlet valves onto the air inlet and outlet ports, such that the air inlet and outlet holes on the air inlet and outlet component are in communication with the air inlet and outlet valves and the air inlet and outlet ports to form air inlet and outlet passages in communication with the external air passage; and the air inlet and outlet valves are independently molded or manufactured into an integral valve sheet which is provided with a positioning hole configured to perform fitting-based positioning on the peripheral wall of the pump body.
  • the piezoelectric ceramic crystal diaphragm seals and encloses the pump body via a first sealing ring arranged on one side of the piezoelectric ceramic crystal diaphragm to construct the working pump chamber; and the lower pump cover is fitted and fixed onto the pump body via a second sealing ring.
  • a spacer that is configured to support and isolate the upper and lower piezoelectric ceramic crystal diaphragms and parallel thereto is provided in the pump body, wherein an opening is provided on the spacer in the vicinity of the air inlet and outlet valves, such that the working pump chamber is shared by the upper and lower piezoelectric ceramic crystal diaphragms; and the upper and lower piezoelectric ceramic crystal diaphragms are laminated on the spacer respectively via third and fourth sealing rings, and seal and enclose the pump body via the opening to construct the working pump chamber with a cross section in the shape of a horizontal U.
  • an annular boss that supports the upper and lower piezoelectric ceramic crystal diaphragms and inwardly protrudes is coaxially arranged on an inner wall of the pump body, and the upper and lower piezoelectric ceramic crystal diaphragms are laminated on the annular boss via third and fourth sealing rings, and seal and enclose the pump body to construct the working pump chamber in the shape of an oval; and the upper and lower pump cover are respectively laminated and fixedly connected onto the pump body via fifth and sixth sealing rings.
  • an end portion of the air outlet port on the pump body is an annular-surfaced arc shape, such that the pump body is in line contact with the end portion of the air outlet port when the air outlet valve is turned off; and an end portion of the inlet hole on the air outlet component is also an annular-surfaced arc shape, such that the air outlet component is in line contact with an end portion of the air inlet hole when the air inlet valve is turned off.
  • the piezoelectric ceramic crystal diaphragm further comprises an insulating layer and a silver plating layer arranged on the metal substrate, wherein a piezoelectric ceramic layer is arranged between the insulating layer and the silver plating layer, and electrodes of the piezoelectric ceramic crystal diaphragm are respectively led out from the metal substrate and the silver plating layer.
  • a technical solution employed by the present invention to solve the technical problem in the prior art may also be a construction method of a piezoelectric ceramic air pump, based on a main structure comprising a pump body, a piezoelectric ceramic crystal diaphragm, and air inlet and output valves, the piezoelectric ceramic crystal diaphragm being co-central-axially mounted on the pump body to construct a working pump chamber for the piezoelectric ceramic air pump; wherein the method comprises step A: adjacently arranging air inlet and output ports configured to communicate the working pump chamber and an external air passage on a peripheral wall on one side of the pump body, wherein the air inlet and outlet valves are mounted at the position of the air inlet and outlet ports.
  • the method further comprises step B: mounting two piezoelectric ceramic crystal diaphragms, including upper and lower piezoelectric ceramic crystal diaphragms; wherein the upper and lower piezoelectric ceramic crystal diaphragms are coaxially oppositely arranged on an outer surface of a metal substrate thereof, and seal and enclose the pump body to construct the shared working pump chamber.
  • the method further comprises step C: arranging a spacer that is configured to support and isolate the upper and lower piezoelectric ceramic crystal diaphragms and parallel thereto in the pump body, wherein an opening is provided on the spacer in the vicinity of the air inlet and outlet valves, such that the dead cavity of the shared working pump chamber is reduced and the pumping efficiency is improved.
  • the method further comprises step D: simultaneously compressing towards each other or expansion-wise axially moves away from each other by the upper and lower piezoelectric ceramic crystal diaphragms within each power source semi-cycle when an alternating current excitation voltage is applied to the upper and lower piezoelectric ceramic crystal diaphragms.
  • the method further comprises step E: respectively laminating the air inlet and outlet valves onto the air inlet and outlet ports, such that the air inlet and outlet holes on the air inlet and outlet component are in communication with the air inlet and outlet valves and the air inlet and outlet ports to form air inlet and outlet passages in communication with the external air passage; and the air inlet and outlet valves are manufactured into an integral valve sheet which is provided with a positioning hole configured to perform fitting-based positioning on the peripheral wall of the pump body.
  • the present invention achieves the following beneficial effects:
  • the air inlet and outlet ports for communication between the working pump chamber and the external air passage are arranged on the peripheral wall of the pump body, and the inlet and outlet valves are arranged thereon, such that the air inlet and outlet passages for communication between the working pump chamber and the external fluid are simplified, the pipeline in which the fluid flows is shortened, the resistance of the pipeline is reduced, the volume of the dead cavity is decreased, and the efficiency of fluid pumping is improved.
  • the number of piezoelectric ceramic crystal diaphragms may be flexibly set to one or two according to the flow rate in practice, and a lot of components are shared in the piezoelectric ceramic air pump, thereby lowering the cost of manufacturing air pumps with different powers.
  • two piezoelectric ceramic crystal diaphragms 50 are mounted; wherein an upper piezoelectric ceramic crystal diaphragm 51 and a lower piezoelectric ceramic crystal diaphragm 53 are respectively fitted and fixed onto inner sides of upper and lower parts of a pump body 10 via an upper pump cover 21 and a lower pump cover 23; and the upper and lower piezoelectric ceramic crystal diaphragms are coaxially oppositely arranged on an outer surface of a metal substrate 91 thereof, and seal and enclose the pump body 10 to construct a shared working pump chamber 15.
  • a spacer 14 that is configured to support and isolate the upper and lower piezoelectric ceramic crystal diaphragms and parallel thereto is provided in the pump body 10, wherein an opening 16 is provided on the spacer 14 in the vicinity of the air inlet and outlet valves, such that the working pump chamber 15 is shared by the upper and lower piezoelectric ceramic crystal diaphragms; and the upper and lower piezoelectric ceramic crystal diaphragms are laminated on the spacer 14 respectively via a third sealing ring 55 and a fourth sealing ring 57, and seal and enclose the pump body 10 via the opening 16 to construct the working pump chamber 15 with a cross section in the shape of a horizontal U.
  • the opening 16 is provided on the spacer 14 in the vicinity of the air inlet and outlet valves, such that the dead cavity of the shared working pump chamber 15 is reduced and the pumping efficiency is improved.
  • an annular boss 12 that supports the upper and lower piezoelectric ceramic crystal diaphragms and inwardly protrudes is coaxially arranged on an inner wall of the pump body 10, and the upper and lower piezoelectric ceramic crystal diaphragms are laminated on the annular boss 12 via a third sealing ring 55 and a fourth sealing ring 57, and seal and enclose the pump body 10 to construct the working pump chamber 15 in the shape of an oval.
  • the upper pump cover 21 and the lower pump cover 23 are respectively laminated and fixedly connected onto the pump body 10 via a fifth sealing ring 25 and a sixth sealing ring 27.
  • piezoelectric ceramic air pump as illustrated in FIG. 1 to FIG. 5 , only one piezoelectric ceramic crystal diaphragm 50 is mounted, and the piezoelectric ceramic crystal diaphragm 50 is fitted and fixed onto the pump body 10 via the lower pump cover 23, and seals and encloses the pump body 10 to construct the working pump chamber 15.
  • the piezoelectric ceramic crystal diaphragm 50 seals and encloses the pump body 10 via a first sealing ring 59 arranged on one side of the piezoelectric ceramic crystal diaphragm 50 to construct the working pump chamber 15; and the lower pump cover 23 is fitted and fixed onto the pump body 10 via a second sealing ring 29.
  • the air inlet port 17 and the air outlet port 18 are adjacently or non-adjacently arranged on the peripheral wall on one side of the pump body 10; an air inlet and outlet component 70 respectively laminates the air inlet valve 61 and the air outlet valve 63 onto the air inlet and outlet ports, such that an air inlet hole 71 and an air outlet hole 73 on the air inlet and outlet component 70 are in communication with the air inlet and outlet valves and the air inlet and outlet ports to form an air inlet passage 81 and an air outlet passage 83 in communication with an external air passage.
  • the air inlet and outlet ports may also be oppositely arranged on peripheral walls at two ends of a diameter line of the pump body 10.
  • the air inlet passage 81 has an air inlet valve space 82 on the side on which the air inlet valve 61 is turned on or off; and the air outlet passage 83 has an air outlet valve space 84 on the side on which the air outlet valve 63 is turned on or off.
  • FIG. 8 is a schematic view of an air inlet state of the piezoelectric ceramic air pump.
  • the arrow direction represents an air inlet direction; in case where the air is taken in, i.e., when the piezoelectric ceramic diaphragm 50 vibrates and causes deformation outwardly, the volume of the working pump chamber 15 increases and a negative pressure is formed in the working pump chamber 15, the air inlet valve 61 is pushed open by the negative pressure, and the air outlet valve 63 is suctioned closed by the negative pressure. In this case, an external fluid enters the working pump chamber 15 through the air inlet valve 61 and the air inlet hole 71 sequentially.
  • FIG. 9 is a schematic view of an air outlet state of the piezoelectric ceramic air pump.
  • the arrow direction represents an air outlet direction; in case where the air is taken in, i.e., when the piezoelectric ceramic diaphragm 50 vibrates and causes deformation in the working pump chamber 15, the volume of the working pump chamber 15 decreases, a positive pressure is formed in the working pump chamber 15, the air inlet valve 61 is suctioned closed by the positive pressure, and the air outlet valve 63 is pushed open by the positive pressure. In this case, an fluid in the working pump chamber 15 flows through the air outlet hole 73 and the air outlet valve 63 sequentially.
  • the air inlet valve 61 and the air outlet valve 63 are manufactured into an integral valve sheet 60.
  • the air inlet valve 61 and the air outlet valve 63 are independently arranged, or may be shared, that is, the air inlet valve 61 and the air outlet valve 63 are the same component. As illustrated in FIG. 10 and FIG.
  • the air inlet valve 61 and the air outlet valve 63 or the integral valve sheet 60 is provided with a positioning hole 66 configured to perform fitting-based positioning on the peripheral wall of the pump body 10, such that the air inlet valve 61 is accurately aligned with the air inlet port 17 on the peripheral wall of the pump body 10, and such that the air outlet valve 63 is accurately aligned with the air outlet port 18 on the peripheral wall of the pump body 10.
  • the piezoelectric ceramic crystal diaphragm 50 further comprises an insulating layer 92 and a silver plating layer 94 arranged on the metal substrate 91, wherein a piezoelectric ceramic layer 93 is arranged between the insulating layer and the silver plating layer, and electrodes of the piezoelectric ceramic crystal diaphragm are respectively led out from the metal substrate 91 and the silver plating layer 94.
  • the method further comprises: simultaneously compressing towards each other or expansion-wise axially moves away from each other by the upper and lower piezoelectric ceramic crystal diaphragms within each power source semi-cycle when an alternating current excitation voltage is applied to the upper and lower piezoelectric ceramic crystal diaphragms.
  • the arrangement of the piezoelectric ceramic crystal diaphragm and the manner of applying the alternating current excitation voltage greatly increase the extrusion efficiency of the fluid in the working pump chamber under extrusion by the diaphragm.
  • the piezoelectric ceramic air pump has a small flow rate which is generally between 0.3 L/min and 0.5 L/min.
  • the piezoelectric ceramic air pump in the technical solution of the present invention has a reasonable deployment of air passages, and thus the operating efficiency of the air pump is improved. Therefore, the piezoelectric ceramic air pump according to the present invention is a highly efficient miniature air pump.
  • a sample designed according to the solution of a preferred embodiment of the present invention is compared with a conventional piezoelectric ceramic air pump in the prior art under the same conditions.
  • the comparison test as listed in Table 1, reveals that although the desired sample has two piezoelectric ceramic diaphragms, the actual power consumption is two-fold lower than that of a single piezoelectric ceramic diaphragm, and the output flow rate is two-fold greater than that of the single piezoelectric ceramic crystal diaphragm.
  • the technical solution according to the present invention is superior over the prior art, with the flow rate output capability and the energy efficiency being both better over the prior art.
  • Table 1 Test sample Voltage/Frequency Current (mA) Power (W) Flow rate (L/min) Piezoelectric ceramic air pump in the prior art 120/60 39.5 0.48 0.36 Sample designed according to the solution of a preferred embodiment 120/60 46.15 0.76 0.90

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  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)

Claims (13)

  1. Pompe à air en céramique piézoélectrique comprenant : un corps de pompe (10), un diaphragme cristallin en céramique piézoélectrique (50) et des soupapes d'entrée et de sortie d'air (61, 63), le diaphragme cristallin en céramique piézoélectrique (50) étant monté selon un axe central commun sur le corps de pompe (10) pour créer une chambre de pompe fonctionnelle (15) destinée à la pompe à air en céramique piézoélectrique ; dans lequel
    le corps de pompe (10) est généralement tubulaire, le diamètre étant très supérieur à la longueur axiale et les ports d'entrée et de sortie d'air (17, 18) conçus pour faire communiquer la chambre de pompe fonctionnelle (15) avec un passage d'air externe sont placés au niveau d'une position d'une paroi périphérique du corps de pompe (10) ;
    les soupapes d'entrée et de sortie d'air (61, 63) sont montées au niveau de la position des ports d'entrée et de sortie d'air (17, 18) ; et
    la pompe à air en céramique piézoélectrique comprend en outre un élément d'entrée et de sortie d'air (70) conçu pour stratifier respectivement les soupapes d'entrée et de sortie d'air (61, 63) sur les ports d'entrée et de sortie d'air (17, 18), de sorte que les orifices d'entrée et de sortie d'air (71, 73) sur l'élément d'entrée et de sortie d'air (70) sont en communication avec les soupapes d'entrée et de sortie d'air (61, 63) et les ports d'entrée et de sortie d'air (17, 18) pour former des passages d'entrée et de sortie d'air (81, 83) en communication avec le passage d'air externe ; et les soupapes d'entrée et de sortie d'air (61, 63) sont moulées de manière indépendante ou fabriquées dans une plaque de soupape intégrée (60) qui est pourvue d'un orifice de positionnement (66) conçu pour effectuer le positionnement basé sur un raccord sur la paroi périphérique du corps de pompe (10).
  2. Pompe à air en céramique piézoélectrique selon la revendication 1, dans laquelle
    seul un diaphragme cristallin en céramique piézoélectrique (50) est monté et le diaphragme cristallin en céramique piézoélectrique (50) est installé et fixé sur le corps de pompe (10) au moyen d'un couvercle de pompe inférieur (23) et assure l'étanchéité et enveloppe le corps de pompe (10) pour créer la chambre de pompe fonctionnelle (15).
  3. Pompe à air en céramique piézoélectrique selon la revendication 1, dans laquelle
    deux diaphragmes cristallins en céramique piézoélectrique (50), dont les diaphragmes cristallins en céramique piézoélectrique supérieur et inférieur (51, 53), sont montés ; dans laquelle les diaphragmes cristallins en céramique piézoélectrique supérieur et inférieur (51, 53) sont respectivement installés et fixés sur les côtés intérieurs des parties supérieure et inférieure du corps de pompe (10) au moyen des couvercles de pompe supérieur et inférieur (21, 23) ; et
    les diaphragmes cristallins en céramique piézoélectrique supérieur et inférieur (51, 53) sont placés de manière coaxiale et opposée sur une surface extérieure d'un substrat métallique (91) de ceux-ci et assurent l'étanchéité et enveloppent le corps de pompe (10) pour créer la chambre de pompe fonctionnelle partagée (15).
  4. Pompe à air en céramique piézoélectrique selon la revendication 1, dans laquelle
    les ports d'entrée et de sortie d'air (17, 18) sont placés de manière adjacente ou non adjacente sur la paroi périphérique sur un côté du corps de pompe (10), ou les ports d'entrée et de sortie d'air (17, 18) sont placés de manière opposée sur les parois périphériques aux deux extrémités d'une ligne de diamètre du corps de pompe (10).
  5. Pompe à air en céramique piézoélectrique selon la revendication 2, dans laquelle
    le diaphragme cristallin en céramique piézoélectrique (50) assure l'étanchéité et enveloppe le corps de pompe (10) au moyen d'une première bague d'étanchéité (59) placée sur un côté du diaphragme cristallin en céramique piézoélectrique (50) pour créer la chambre de pompe fonctionnelle (15) ; et le couvercle de pompe inférieur (23) est installé et fixé sur le corps de pompe (10) au moyen d'une deuxième bague d'étanchéité (29).
  6. Pompe à air en céramique piézoélectrique selon la revendication 3, dans laquelle
    un espaceur (14) qui est conçu pour supporter et isoler les diaphragmes cristallins en céramique piézoélectrique supérieur et inférieur (51, 53) et parallèle à ceux-ci est prévue dans le corps de pompe (10), dans laquelle une ouverture (16) est prévue sur l'espaceur (14) à proximité des soupapes d'entrée et de sortie d'air (61, 63), de sorte que la chambre de pompe fonctionnelle (15) est partagée par les diaphragmes cristallins en céramique piézoélectrique supérieur et inférieur (51, 53) ; et
    les diaphragmes cristallins en céramique piézoélectrique supérieur et inférieur (51, 53) sont stratifiés sur l'espaceur (14), respectivement au moyen des troisième et quatrième bagues d'étanchéité (55, 57) et assurent l'étanchéité et enveloppent le corps de pompe (10) au moyen de l'ouverture (16) pour créer la chambre de pompe fonctionnelle (15) avec une section transversale en forme de U horizontal.
  7. Pompe à air en céramique piézoélectrique selon la revendication 3, dans laquelle
    un protubérance annulaire (12) qui supporte les diaphragmes cristallins en céramique piézoélectrique supérieur et inférieur (51, 53) et font saillie vers l'intérieur est placé de manière coaxiale sur une paroi intérieure du corps de pompe (10) et les diaphragmes cristallins en céramique piézoélectrique supérieur et inférieur (51, 53) sont stratifiés sur la protubérance annulaire (12) au moyen des troisième et quatrième bagues d'étanchéité (55, 57) et assurent l'étanchéité et enveloppent le corps de pompe (10) pour créer la chambre de pompe fonctionnelle (15) sous la forme d'un ovale ; et
    les couvercles de pompe supérieur et inférieur (21, 23) sont respectivement stratifiés et raccordés à demeure sur le corps de pompe (10) au moyen des cinquième et sixième bagues d'étanchéité (25, 27).
  8. Pompe à air en céramique piézoélectrique selon la revendication 1, dans laquelle
    une partie d'extrémité du port de sortie d'air (18) sur le corps de pompe (10) est une forme d'arc à surface annulaire, de sorte que le corps de pompe (10) est en contact linéaire avec la partie d'extrémité du port de sortie d'air (18) lorsque la soupape de sortie d'air (63) est désactivée ; et une partie d'extrémité de l'orifice d'entrée d'air (71) sur l'élément de sortie d'air (70) est également une forme d'arc à surface annulaire, de sorte que l'élément de sortie d'air (70) est en contact linéaire avec une partie d'extrémité de l'orifice d'entrée d'air (71) lorsque la soupape d'entrée d'air (61) est désactivée.
  9. Pompe à air en céramique piézoélectrique selon la revendication 1, dans laquelle
    le diaphragme cristallin en céramique piézoélectrique (50) comprend en outre une couche isolante (92) et une couche de placage d'argent (94) placées sur le substrat métallique (91), dans laquelle une couche de céramique piézoélectrique (93) est placée entre la couche isolante et la couche de placage d'argent et les électrodes du diaphragme cristallin en céramique piézoélectrique sont respectivement conduites hors du substrat métallique (91) et de la couche de placage d'argent (94).
  10. Procédé de construction d'une pompe à air en céramique piézoélectrique basé sur une structure principale comprenant un corps de pompe (10), un diaphragme cristallin en céramique piézoélectrique (50) et des soupapes d'entrée et de sortie d'air (61, 63), le diaphragme cristallin en céramique piézoélectrique (50) étant monté selon un axe central commun sur le corps de pompe (10) pour créer une chambre de pompe fonctionnelle (15) destinée à la pompe à air en céramique piézoélectrique ; dans lequel le procédé comprend l'étape A :
    le placement de manière adjacente des ports d'entrée et de sortie d'air (17, 18) conçus pour faire communiquer la chambre de pompe fonctionnelle (15) et un passage d'air externe sur une paroi périphérique sur un côté du corps de pompe (10), dans lequel les soupapes d'entrée et de sortie d'air (61, 63) sont montées au niveau de la position des ports d'entrée et de sortie d'air (17, 18) ; et
    dans lequel le procédé comprend en outre l'étape E :
    la stratification respectivement des soupapes d'entrée et de sortie d'air (61, 63) sur les ports d'entrée et de sortie d'air (17, 18), de sorte que les orifices d'entrée et de sortie d'air (71, 73) sur un élément d'entrée et de sortie d'air (70) sont en communication avec les soupapes d'entrée et de sortie d'air (61, 63) et les ports d'entrée et de sortie d'air (17, 18) pour former des passages d'entrée et de sortie d'air (81, 83) en communication avec le passage d'air externe ; et les soupapes d'entrée et de sortie d'air (61, 63) sont fabriquées dans une plaque de soupape intégrée (60) qui est pourvue d'un orifice de positionnement (66) conçu pour effectuer le positionnement basé sur un raccord sur la paroi périphérique du corps de pompe (10).
  11. Procédé de construction d'une pompe à air en céramique piézoélectrique selon la revendication 10, comprenant en outre l'étape B :
    le montage de deux diaphragmes cristallins en céramique piézoélectrique (50), dont les diaphragmes cristallins en céramique piézoélectrique supérieur et inférieur (51, 53) dans lequel les diaphragmes cristallins en céramique piézoélectrique supérieur et inférieur (51, 53) sont placés de manière coaxiale et opposée sur une surface extérieure d'un substrat métallique (91) de ceux-ci et assurent l'étanchéité et enveloppent le corps de pompe (10) pour créer la chambre de pompe fonctionnelle partagée (15).
  12. Procédé de construction d'une pompe à air en céramique piézoélectrique selon la revendication 11, comprenant en outre l'étape C :
    le placement d'un espaceur (14) qui est conçu pour supporter et isoler les diaphragmes cristallins en céramique piézoélectrique supérieur et inférieur (51, 53) et parallèle à ceux-ci dans le corps de pompe (10), dans lequel une ouverture (16) est prévue sur l'espaceur (14) à proximité des soupapes d'entrée et de sortie d'air (61, 63), de sorte que la cavité morte de la chambre de pompe fonctionnelle partagée (15) est réduite et l'efficacité de pompage est améliorée.
  13. Procédé de construction d'une pompe à air en céramique piézoélectrique selon la revendication 11 12, comprenant en outre l'étape D :
    la compression de manière simultanée l'un vers l'autre ou le déplacement de manière axiale en matière de dilatation loin l'un de l'autre par les diaphragmes cristallins en céramique piézoélectrique supérieur et inférieur (51, 53) à l'intérieur de chaque demi-cycle de la source d'alimentation lorsqu'une tension d'excitation en courant alternatif est appliquée aux diaphragmes cristallins en céramique piézoélectrique supérieur et inférieur (51, 53).
EP16887181.2A 2016-01-29 2016-01-29 Pompe à air en céramique piézoélectrique et son procédé de fabrication Active EP3306090B1 (fr)

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EP3306090A1 (fr) 2018-04-11
US20180209412A1 (en) 2018-07-26
WO2017128297A1 (fr) 2017-08-03
EP3306090A4 (fr) 2019-01-23

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