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US20190055936A1 - Energy-saving control method of resonant piezoelectric air pump - Google Patents

Energy-saving control method of resonant piezoelectric air pump Download PDF

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Publication number
US20190055936A1
US20190055936A1 US16/048,766 US201816048766A US2019055936A1 US 20190055936 A1 US20190055936 A1 US 20190055936A1 US 201816048766 A US201816048766 A US 201816048766A US 2019055936 A1 US2019055936 A1 US 2019055936A1
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US
United States
Prior art keywords
air pump
resonant piezoelectric
energy
control method
resonant
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US16/048,766
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English (en)
Inventor
Hao-Jan Mou
Shih-Chang Chen
Jia-Yu Liao
Chi-Feng Huang
Wei-Ming Lee
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Microjet Technology Co Ltd
Original Assignee
Microjet Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Microjet Technology Co Ltd filed Critical Microjet Technology Co Ltd
Assigned to MICROJET TECHNOLOGY CO., LTD. reassignment MICROJET TECHNOLOGY CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MOU, HAO-JAN, HUANG, CHI-FENG, CHEN, SHIH-CHANG, LEE, WEI-MING, LIAO, Jia-yu
Publication of US20190055936A1 publication Critical patent/US20190055936A1/en
Abandoned legal-status Critical Current

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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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F04B49/065—Control using electricity and making use of computers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/003—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by piezoelectric means
    • 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
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
    • 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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/80—Constructional details
    • H10N30/802—Circuitry or processes for operating piezoelectric or electrostrictive devices not otherwise provided for, e.g. drive circuits
    • 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
    • F04B2207/00—External parameters
    • F04B2207/04—Settings
    • F04B2207/043—Settings of time
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/20—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators
    • H10N30/204—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators using bending displacement, e.g. unimorph, bimorph or multimorph cantilever or membrane benders
    • H10N30/2047—Membrane type
    • H10W40/43—

Definitions

  • the present disclosure relates to an energy-saving control method of a resonant piezoelectric air pump, and more particularly to an energy-saving control method for driving a resonant piezoelectric air pump by adjusting a duty ratio.
  • the resonant piezoelectric air pump or the miniature motor is driven to transfer the air in an operation without interruption, so as to maximize the amount of the transferred air per unit of time.
  • the operation without interruption consumes a lot of power, and the consumed power under the operation without interruption can't result in the most efficient air transfer. Accordingly, there is a need for a solution that enhances the efficiency of air transfer of the resonant piezoelectric air pump or the miniature motor and saves energy at the same time.
  • the temperature of the elements therein may be too high. Accordingly, the elements inside the resonant piezoelectric air pump or the miniature motor are broken due to the over-high temperature, the efficiency of air transfer decreases, and the temperature of the outputted air is too high. Accordingly, it is also important to prevent the temperature from getting too high during the air transfer of the resonant piezoelectric air pump or the miniature motor.
  • An object of the present disclosure provides an energy-saving control method of a resonant piezoelectric air pump.
  • the duty ratio for driving the resonant piezoelectric air pump By adjusting the duty ratio for driving the resonant piezoelectric air pump, the problems that exists in the prior art relating to inefficient air transfer, large power consumption and over-high temperature caused by the operation without interruption are solved.
  • an energy-saving control method of a resonant piezoelectric air pump includes steps of: (a) providing the resonant piezoelectric air pump and a control module, wherein the resonant piezoelectric air pump and the control module are electrically connected to each other; (b) at the beginning of a unit of time, operating the control module to transmit an enable signal to the resonant piezoelectric air pump so that the resonant piezoelectric air pump is driven to transfer an amount of air in a process for air transfer; (c) during the unit of time, adjusting duty ratio of the enable signal by using the control module for enabling or disabling the resonant piezoelectric air pump; and (d) after spending the unit of time, repeating the step (b) and the step (c) in another unit of time or more units of time thereafter until the process for air transfer is completed.
  • an energy-saving control method of a resonant piezoelectric air pump includes steps of: (a) providing at least one resonant piezoelectric air pump and at least one control module, wherein the resonant piezoelectric air pump and the control module are electrically connected to each other; (b) at the beginning of at least one unit of time, operating the control module to transmit at least one enable signal to the resonant piezoelectric air pump so that the resonant piezoelectric air pump is driven to transfer an amount of air in a process for air transfer; (c) during the unit of time, adjusting a duty ratio of the enable signal by using the control module for enabling or disabling the resonant piezoelectric air pump; and (d) after spending the unit of time, repeating the step (b) and the step (c) in another unit of time or more units of time thereafter until the process for air transfer is completed.
  • FIG 1A is a schematic view illustrating a resonant piezoelectric air pump and a control module according to an embodiment of the present disclosure
  • FIG. 1B is a flowchart illustrating an energy-saving control method of the resonant piezoelectric air pump according to an embodiment of the present disclosure
  • FIG. 2A is a schematic graph showing an output signal driving the resonant piezoelectric air pump at 100% duty ratio versus time;
  • FIG. 2B is a schematic graph showing an output air pressure of driving the resonant piezoelectric air pump at 100% duty ratio versus time;
  • FIG. 2C is a schematic graph showing an output signal of driving the resonant piezoelectric air pump at a duty ratio according to a first embodiment of the present disclosure versus time;
  • FIG. 2D is a schematic graph showing an output air pressure of driving the resonant piezoelectric air pump at the duty ratio according to the first embodiment of the present disclosure versus time;
  • FIG. 2E is a schematic graph showing an output signal of driving the resonant piezoelectric air pump at a duty ratio according to a second embodiment of the present disclosure versus time;
  • FIG. 3A is a schematic exploded view illustrating a resonant piezoelectric air pump according to an embodiment of the present disclosure
  • FIG. 3B is a schematic exploded view illustrating the resonant piezoelectric air pump of FIG. 3A and taken along another viewpoint;
  • FIG. 4A is a schematic exploded view illustrating the piezoelectric actuator of FIG. 3A ;
  • FIG. 4B is a schematic exploded view illustrating the piezoelectric actuator of FIG. 3A and taken along another viewpoint;
  • FIG. 4C is a schematic cross-sectional view illustrating the piezoelectric actuator of FIG. 3A ;
  • FIGS. 5A to 5E schematically illustrate the actions of the resonant piezoelectric air pump of FIG. 3A .
  • the present disclosure provides an energy-saving control method of a resonant piezoelectric air pump including at least one resonant piezoelectric air pump 12 , at least one control module 11 , at least one unit of time and at least one enable signal.
  • the number of the resonant piezoelectric air pump 12 , the control module 11 , the unit of time and the enable signal is exemplified by one for each in the following embodiments but not limited thereto. It is noted that each of the resonant piezoelectric air pump 12 , the control module 11 , the unit of time and the enable signal can also be provided in plural numbers.
  • the resonant piezoelectric air pump 12 is a resonance-type piezoelectric air pump for air transfer.
  • the resonant piezoelectric air pump 12 can be applied in all kinds of electronic devices and medical equipments, such as notebook computer, smart phone, smart watch, tablet computer and so on, but not limited thereto.
  • FIG 1A is a schematic view illustrating a resonant piezoelectric air pump and a control module according to an embodiment of the present disclosure. As shown in FIG. 1A , the resonant piezoelectric air pump 12 is electrically connected to the control module 11 .
  • the control module 11 is configured to enable or disable the resonant piezoelectric air pump 12 , but not limited thereto.
  • control module 11 is connected to a power source (not shown) for providing a driving power to the control module 11 .
  • the control module 11 determines whether the driving power is transmitted to the resonant piezoelectric air pump 12 , so as to control the on/off operations of the resonant piezoelectric air pump 12 .
  • FIG. 1B is a flowchart illustrating an energy-saving control method of the resonant piezoelectric air pump according to an embodiment of the present disclosure.
  • the energy-saving control method of the resonant piezoelectric air pump achieves energy-saving and efficient air transfer by adjusting the ratio of the enable signal of the resonant piezoelectric air pump 12 in a unit of time (i.e., duty ratio).
  • the resonant piezoelectric air pump 12 and the control module 11 are provided (Step S 1 ).
  • the resonant piezoelectric air pump 12 is electrically connected to the control module 11 , and the control module 11 is configured to enable or disable the resonant piezoelectric air pump 12 , but not limited thereto.
  • the detailed structure of the resonant piezoelectric air pump 12 will be further described as follows.
  • the control module 11 transmits an enable signal to the resonant piezoelectric air pump 12 , and the resonant piezoelectric air pump 12 is driven to transfer an amount of air in a process for air transfer (Step S 2 ).
  • the unit of time is a time interval between two neighboring starting moments of the resonant piezoelectric air pump 12 when being enabled.
  • the time interval therebetween refers to a single unit of time.
  • the unit of time has a specific value, which may be varied according to the practical requirements.
  • the control module 11 adjusts the duty ratio of the enable signal to control an operation relating to enabling and disabling the resonant piezoelectric air pump 12 until the unit of time ends (Step S 3 ). Namely, the control module 11 adjusts the duty ratio of the enable signal, so as to enable or disable the resonant piezoelectric air pump 12 within the unit of time according to the enable signal. Finally, after the unit of time finishes, the next unit of time begins, and Step S 2 and Step S 3 are repeated in each unit of time subsequently until the process for air transfer is completed (Step S 4 ).
  • FIG. 2A is a schematic graph showing an output signal of driving the resonant piezoelectric air pump at 100% duty ratio versus time
  • FIG. 2B is a schematic graph showing an output air pressure of driving the resonant piezoelectric air pump at 100% duty ratio versus time.
  • the resonant piezoelectric air pump 12 keeps operating without interruption within the unit of time A. That is, the resonant piezoelectric air pump 12 is driven at 100% duty ratio.
  • FIG. 2B the resonant piezoelectric air pump 12 driven at 100% duty ratio reaches a specific output air pressure X after five units of time A.
  • FIG. 2C is a schematic graph showing an output signal of driving the resonant piezoelectric air pump at a duty ratio according to a first embodiment of the present disclosure versus time
  • FIG. 2D is a schematic graph showing an output air pressure of driving the resonant piezoelectric air pump at the duty ratio according to the first embodiment of the present disclosure versus time.
  • the resonant piezoelectric air pump 12 according to the first embodiment of the present disclosure starts to operate at the beginning of the unit of time A, and receives the enable signal only during 10% of the unit of time A. That is, the duty ratio of the enable signal for driving the resonant piezoelectric air pump 12 is 10%.
  • the duty ratio of the enable signal is not limited thereto, and it may be varied according to the practical requirements.
  • the resonant piezoelectric air pump 12 driven at 10% duty ratio reaches the specific output air pressure X after seven units of time A.
  • the resonant piezoelectric air pump 12 driven at 100% duty ratio allows the air pressure to accumulate and reach the specific output air pressure X rapidly.
  • unnecessary power consumption is reduced.
  • the over-high temperature, damage to elements or even reduction in service life of elements, all of which are caused by the continuous operation of the resonant piezoelectric air pump 12 can be avoided. Therefore, the effects of saving energy and efficient air transfer are achieved.
  • FIG. 2E is a schematic graph showing an output signal of driving the resonant piezoelectric air pump at a duty ratio according to a second embodiment of the present disclosure versus time.
  • the resonant piezoelectric air pump 12 according to the second embodiment of the present disclosure starts to operate at the beginning of the unit of time A, and receives the enable signal only during 50% of the unit of time A. That is, the duty ratio of the enable signal for driving the resonant piezoelectric air pump 12 is 50%.
  • the duty ratio of the enable signal is not limited thereto, and it may be varied according to the practical requirements.
  • the duty ratio of the enable signal for driving the resonant piezoelectric air pump 12 can be any value between 0.1% and 99%, but is not limited thereto.
  • FIG. 3A is a schematic exploded view illustrating a resonant piezoelectric air pump according to an embodiment of the present disclosure
  • FIG. 3B is a schematic exploded view illustrating the resonant piezoelectric air pump of FIG. 3A and taken along another viewpoint.
  • the resonant piezoelectric air pump 12 includes an air inlet plate 121 , a resonance plate 122 , a piezoelectric actuator 123 , a first insulation plate 1241 , a conducting plate 125 and a second insulation plate 1242 .
  • the air inlet plate 121 , the resonance plate 122 , the piezoelectric actuator 123 , the first insulation plate 1241 , the conducting plate 125 and the second insulation plate 1242 are stacked on each other sequentially to be assembled together as the resonant piezoelectric air pump 12 .
  • the piezoelectric actuator 123 is assembled from a suspension plate 1230 and a piezoelectric ceramic plate 1233 and is disposed spatially corresponding to the resonance plate 122 .
  • the air is fed from at least one inlet 1210 of the air inlet plate 121 into the resonant piezoelectric air pump 12 and passes through plural pressure chambers by enabling the piezoelectric actuator 123 , so as to transfer an amount of air in a process for air transfer.
  • the air inlet plate 121 of the resonant piezoelectric air pump 12 has at least one inlet 1210 .
  • the air inlet plate 121 has four inlets 1210 , and the number of the inlet 1210 may be varied according to the practical requirements.
  • the air can be introduced into the resonant piezoelectric air pump 12 through the at least one inlet 1210 .
  • a central cavity 1211 and at least one convergence channel 1212 are formed on a bottom surface of the air inlet plate 121 , and the bottom surface is opposite to the inlets 1210 .
  • the number of the at least one convergence channel 1212 is four, but not limited thereto.
  • the four convergence channels 1212 are disposed spatially corresponding to the four inlets 1210 on the top surface of the air inlet plate 121 respectively, such that the air entered from the inlet 1210 would be guided along the convergence channels 1212 to the central cavity 1211 and transferred downwardly. Consequently, the air can be transferred by the resonant piezoelectric air pump 12 .
  • the at least one inlet 1210 , the at least one convergence channel 1212 and the central cavity 1211 of the air inlet plate 121 are integrally formed from a single structure.
  • the central cavity 1211 is a convergence chamber for temporarily storing the air.
  • the air inlet plate 131 may be, for example, made of stainless steel.
  • the depth of the convergence chamber defined by the central cavity 1211 is equal to the depth of the at least one convergence channel 1212 .
  • the resonance plate 122 is made of a flexible material, but not limited thereto.
  • the resonance plate 122 includes a central aperture 1220 disposed corresponding to the central cavity 1211 on the bottom surface of the air inlet plate 121 for allowing the air to be transferred downwardly.
  • the resonance plate 122 may be made of copper.
  • FIG. 4A is a schematic exploded view illustrating the piezoelectric actuator of FIG. 3A
  • FIG. 4B is a schematic exploded view illustrating the piezoelectric actuator of FIG. 3A and taken along another viewpoint
  • FIG. 4C is a schematic cross-sectional view illustrating the piezoelectric actuator of FIG. 3A
  • the piezoelectric actuator 123 includes a suspension plate 1230 , an outer frame 1231 , a plurality of brackets 1232 and a piezoelectric ceramic plate 1233 .
  • the piezoelectric ceramic plate 1233 is attached on a bottom surface 1230 b of the suspension plate 1230 .
  • the plural brackets 1232 are connected between the suspension plate 1230 and the outer frame 1231 . While in each bracket 1232 , two ends of the bracket 1232 are connected to the outer frame 1231 , and another end of the bracket 1232 is connected to the suspension plate 1230 . A plurality of vacant spaces 1235 are formed among the bracket 1232 , the suspension plate 1230 and the outer frame 1231 so that the air can go through the vacant spaces 1235 .
  • the disposing way and type of the suspension plate 1230 , the outer frame 1231 and the brackets 1232 and the number of the brackets 1232 may be varied according to the practical requirements.
  • a conducting pin 1234 is protruded outwardly from the outer frame 1231 so as to be electrically connected to an external circuit (not shown).
  • the suspension plate 1230 has a bulge 1230 c that makes the suspension plate 1230 a stepped structure.
  • the bulge 1230 c is formed on a top surface 1230 a of the suspension plate 1230 .
  • the bulge 1230 c is for example but not limited to a circular convex structure.
  • a top surface of the bulge 1230 c of the suspension plate 1230 is coplanar with a top surface 1231 a of the outer frame 1231
  • the top surface 1230 a of the suspension plate 1230 is coplanar with a top surface 1232 a of the bracket 1232 .
  • the suspension plate 1230 , the plural brackets 1232 and the outer frame 1231 are integrally formed from a metal plate (e.g., a stainless steel plate).
  • the resonant piezoelectric air pump 12 has the first insulation plate 1241 , the conducting plate 125 and the second insulation plate 1242 , which are stacked on each other sequentially and located under the piezoelectric actuator 123 .
  • the profiles of the first insulation plate 1241 , the conducting plate 125 and the second insulation plate 1242 substantially match the profile of the outer frame 1231 of the piezoelectric actuator 123 .
  • the first insulation plate 1241 and the second insulation plate 1242 are made of insulating materials (e.g. plastic material) for providing insulating efficacy.
  • the conducting plate 125 is made of an electrically conductive material (e.g. a metallic material) for providing electrically conducting efficacy.
  • the conducting plate 125 has a conducting pin 1251 so as to be electrically connected to an external circuit (not shown).
  • FIGS. 5A to 5E schematically illustrate the actions of the resonant piezoelectric air pump of FIG. 3A .
  • the air inlet plate 121 , the resonance plate 122 , the piezoelectric actuator 123 , the first insulation plate 1241 , the conducting plate 125 and the second insulation plate 1242 of the resonant piezoelectric air pump 12 are stacked on each other sequentially.
  • there is a gap g 0 between the resonance plate 122 and the outer frame 1231 of the piezoelectric actuator 123 which is formed and maintained by a filler (e.g.
  • the gap g 0 ensures the proper distance between the resonance plate 122 and the bulge 1230 c of the suspension plate 1230 of the piezoelectric actuator 123 , so that the air can be transferred quickly, the contact interference is reduced and the generated noise is largely reduced.
  • the height of the outer frame 1231 of the piezoelectric actuator 123 is increased, so that the gap is formed between the resonance plate 122 and the piezoelectric actuator 123 .
  • the convergence chamber for converging the air is further defined by the central aperture 1220 of the resonance plate 122 and the central cavity 1211 of the air inlet plate 121 collaboratively.
  • a first chamber 1221 is formed between the resonance plate 122 and the piezoelectric actuator 123 for temporarily storing the air.
  • the first chamber 1221 is in communication with the convergence chamber formed within the central cavity 1211 on the bottom surface of the air inlet plate 121 .
  • the air in the peripheral regions of the first chamber 1221 can be discharged through the vacant space 1235 between the brackets 1232 of the piezoelectric actuator 123 .
  • the piezoelectric actuator 123 vibrates along a vertical direction in a reciprocating manner by using the bracket 1232 as a fulcrum.
  • the air is fed from the at least one inlet 1210 of the air inlet plate 121 and converged to the central cavity 1211 along the at least one convergence channel 1212 on the bottom surface of the air inlet plate 121 .
  • the air is transferred through the central aperture 1220 of the resonance plate 122 which is disposed corresponding to the central cavity 1211 , and introduced downwardly into the first chamber 1221 .
  • the resonance plate 122 is in resonance with the piezoelectric actuator 123 and thus the resonance plate 122 also vibrates vertically in a reciprocating manner.
  • FIG. 5D shows that the resonance plate 122 returns to its original position.
  • the piezoelectric actuator 123 driven by the applied voltage vibrates upwardly with a displacement d.
  • the volume of the first chamber 1221 is continuously compressed to generate the pressure gradient which makes the air in the first chamber 1221 continuously pushed toward peripheral regions.
  • the external ambient air is continuously fed into the at least one inlet 1210 of the air inlet plate 121 , and transferred to the convergence chamber formed within the central cavity 1211 .
  • the resonance plate 122 moves upwardly in resonance with the piezoelectric actuator 123 . Consequently, the air is introduced into the first chamber 1221 through the central aperture 1220 of the resonance plate 122 , moves downwardly and discharged from the resonant piezoelectric air pump 12 through the vacant space 1235 between the brackets 1232 of the piezoelectric actuator 123 . Consequently, a pressure gradient is generated in the designed fluid channels of the resonant piezoelectric air pump 12 to facilitate the air to flow at a high speed.
  • the vibration frequency of the vertical reciprocation of the resonance plate 122 is equal to the vibration frequency of the piezoelectric actuator 123 . That is, the resonance plate 122 and the piezoelectric actuator 123 move upwardly or downwardly at the same time.
  • the vibration frequencies thereof can be varied according to the practical requirements, but not limited to the actions shown in the embodiments of the present disclosure.
  • the unit of time described above is for example but not limited to 1 second.
  • the frequency of the enable signal is between 20 KHz and 28 KHz.
  • the frequency of the enable signal is exemplified by 28 KHz and further described below.
  • the enable signal drives the piezoelectric actuator 123 to operate 28000 times per second.
  • the enable signal drives the piezoelectric actuator 123 to operate 2800 times per second.
  • the duty ratio is 0.1%
  • the enable signal drives the piezoelectric actuator 123 to operate 28 times per second.
  • the unit of time may be 0.5 seconds but not limited thereto.
  • the present disclosure provides an energy-saving control method of a resonant piezoelectric air pump.
  • the control module By the control module, the duty ratio of the enable signal for driving the resonant piezoelectric air pump is adjusted, thus the power consumption is reduced.
  • the over-high temperature, damage to elements or even reduction in service life of elements, all of which are caused by the continuous operation of the resonant piezoelectric air pump, can be avoided. Therefore, the effects of saving energy and efficient air transfer are achieved.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Reciprocating Pumps (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
US16/048,766 2017-08-21 2018-07-30 Energy-saving control method of resonant piezoelectric air pump Abandoned US20190055936A1 (en)

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Application Number Priority Date Filing Date Title
TW106128266A TWI712741B (zh) 2017-08-21 2017-08-21 共振式壓電氣體泵浦之節能控制方法
TW106128266 2017-08-21

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TWI734476B (zh) * 2020-05-14 2021-07-21 研能科技股份有限公司 薄型泵浦的補強方法

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EP3203070A1 (en) * 2016-01-29 2017-08-09 Microjet Technology Co., Ltd Miniature fluid control device

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EP3447286A1 (en) 2019-02-27
JP2019037123A (ja) 2019-03-07
TWI712741B (zh) 2020-12-11
TW201912939A (zh) 2019-04-01

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