EP3477208A1 - Schallschlauchaspiratorvorrichtung - Google Patents

Schallschlauchaspiratorvorrichtung Download PDF

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Publication number
EP3477208A1
EP3477208A1 EP17199195.3A EP17199195A EP3477208A1 EP 3477208 A1 EP3477208 A1 EP 3477208A1 EP 17199195 A EP17199195 A EP 17199195A EP 3477208 A1 EP3477208 A1 EP 3477208A1
Authority
EP
European Patent Office
Prior art keywords
cylindrical tube
standing wave
tube
holes
sound
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.)
Withdrawn
Application number
EP17199195.3A
Other languages
English (en)
French (fr)
Inventor
Onur ULUAG
Kagan Bakanoglu
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.)
Vestel Elektronik Sanayi ve Ticaret AS
Original Assignee
Vestel Elektronik Sanayi ve Ticaret AS
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 Vestel Elektronik Sanayi ve Ticaret AS filed Critical Vestel Elektronik Sanayi ve Ticaret AS
Priority to EP17199195.3A priority Critical patent/EP3477208A1/de
Priority to TR2017/18995A priority patent/TR201718995A2/tr
Publication of EP3477208A1 publication Critical patent/EP3477208A1/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/20—Removing cooking fumes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F7/00—Pumps displacing fluids by using inertia thereof, e.g. by generating vibrations therein
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
    • F02G2243/00—Stirling type engines having closed regenerative thermodynamic cycles with flow controlled by volume changes
    • F02G2243/30—Stirling type engines having closed regenerative thermodynamic cycles with flow controlled by volume changes having their pistons and displacers each in separate cylinders
    • F02G2243/50—Stirling type engines having closed regenerative thermodynamic cycles with flow controlled by volume changes having their pistons and displacers each in separate cylinders having resonance tubes
    • F02G2243/52—Stirling type engines having closed regenerative thermodynamic cycles with flow controlled by volume changes having their pistons and displacers each in separate cylinders having resonance tubes acoustic

Definitions

  • This invention refers to an acoustic tube aspirator apparatus for ventilating cooking environment according to claim 1 and a method according to claim 10.
  • Ventilation systems such as aspirators are essential features that are implemented especially for cooking environments for creating an air flow in desired directions.
  • exhausting systems such as propeller based systems are used.
  • These systems introduce many drawbacks such as rotational noise, vortex noise, turbulence-induced noise, interaction, and distortion effects.
  • noise pollution due to the conventional exhausting systems.
  • Another way to reduce noise pollution is to utilize scientific phenomenon such as standing waves and acoustic levitation. So far this phenomenon is not implemented in the ventilating systems.
  • an aspirator apparatus for creating the air flow in the desired directions using standing sound waves.
  • Prior art document US4962330 A discloses an acoustic transducer apparatus with reduced thermal conduction.
  • a horn is described for transmitting sound from a transducer to a heated chamber containing an object which is levitated by acoustic energy while it is heated to a molten state, which minimizes heat transfer to thereby minimize heating of the transducer, minimize temperature variation in the chamber, and minimize loss of heat from the chamber.
  • the forward portion of the horn which is the portion closest to the chamber, has holes that reduce its cross-sectional area to minimize the conduction of heat along the length of the horn, with the entire front portion of the horn being rigid and having an even front face to efficiently transfer high frequency acoustic energy to fluid in the chamber.
  • the horn has numerous rows of holes extending perpendicular to the length of horn, with alternate rows extending perpendicular to one another to form a sinuous path for the conduction of heat along the length of the horn.
  • US4393708 A discloses an acoustic system for material transport.
  • the object is placed in a first end portion of the chamber while a resonant mode is applied along the length of the chamber that produces a pressure well at that location.
  • the frequency is then switched to a second mode that produces a pressure well at the center of the chamber, to draw the object thereto.
  • the acoustic frequency is again shifted to a third mode (which may equal the first mode) that has a pressure well in the second end portion of the chamber, to draw the object thereto.
  • a heat source may be located near the second end of the chamber to heat the sample, and after the sample is heated it can be cooled by moving it in a corresponding manner back to the first end portion of the chamber.
  • the transducers for levitating and moving the object may be all located at the cool first end of the chamber.
  • prior art US4218921A relates to a method and apparatus for shaping and enhancing acoustical levitation forces.
  • the method and apparatus for enhancing and shaping acoustical levitation forces in a single-axis acoustic resonance system wherein specially shaped drivers and reflectors are utilized to enhance the levitation force and better contain fluid substances by means of field shaping.
  • prior art US4688199A discloses transducers and control means.
  • a standing wave is produced by interaction between the outputs of a pair of ultrasonic transducers driven by respective signal generating means.
  • a phase interlock determines the phase difference between the signals and thus is progressively changed by a control signal regulated by a digital control means operated by a program so as to produce stepwise phase differences between the transducers in a cyclically varying manner.
  • a sequence of momentary phase changes occur between the outputs of the signal generating means so that the standing wave is caused to move at a rate dependent upon the programmed operation of the digital control means.
  • the subject-matter of prior arts states the method of generating the standing waves and acoustic levitation.
  • the control of the standinng waves using transducers are available.
  • the acoustic tube aspirator apparatus for ventilating cooking environment comprises, at least one cylindrical tube, at least two sound transducers, at least one control unit and a plurality of amplifiers.
  • Each of the sound transducers are attached to two ends of the cylindrical tube for generating sound waves inside the cylindrical tube from both the ends of the cylindrical tube.
  • the generated sound waves from both the ends are in opposite direction to each other for creating a standing wave inside the cylindrical tube.
  • the cylindrical tube is provided with plurality of holes for allowing air flow between the cylindrical tube and the cooking environment.
  • the holes are provided in the cylindrical tube on locations of nodes and antinodes of the standing wave that pass through the cylindrical tube.
  • the standing waves create precise pressure variations in specific volumes of the cylindrical tube which in turn sucks unwanted gases and scattered fluids from the cooking environment thereby to create air flow in desired directions.
  • the present invention can be implemented in the fields of ventilation systems, aspirators, oven, cookers, cook-tops, heaters, home appliances and for similar ventilation requirements.
  • control unit is provided to control the generation of at least one sound wave from the sound transducer and also to control phase and amplitude of the sound wave.
  • control unit adjusts the phase and amplitude of the sound waves which in turn adjusts the pressure variation inside the cylindrical tube to increase the ventilation process.
  • the plurality of amplifiers can boost the sound waves.
  • the sound transducer generates standing waves in same frequency and phase.
  • the frequency of the standing wave is related to the distance between the holes on the cylindrical tube, and wherein the distance between holes fits a wavelength of the standing wave.
  • the phase of the standing wave is related to a position of the sound transducer from the holes in the cylindrical tube. A change in phase of the sound wave due to air flow generates resultant standing wave for sucking the unwanted gases and the scattered fluids from the cooking environment.
  • the holes are provided in the cylindrical tube on locations of nodes of the standing wave so that the air flow from the cylindrical tube is allowed to pass to the outside environment.
  • the holes are provided in the cylindrical tube on locations of antinodes of the standing wave which allows the air flow from the outside environment to the cylindrical tube.
  • Said method preferably comprises the steps: generating a standing wave inside a cylindrical tube using a sound transducer provided at each end of the cylindrical tube, generating the standing wave in a same frequency and phase, allowing air flow between the cylindrical tube and the cooking environment through a plurality of holes provided at the cylindrical tubes, allowing the standing wave to create a pressure gradient inside the cylindrical tube, and ventilating the cooking environment using the pressure gradient inside the cylindrical tube.
  • Fig. 1 illustrates a standing wave generated in a cylindrical tube 100 according to the present invention.
  • the acoustic tube aspirator apparatus for ventilating cooking environment comprises, at least one cylindrical tube 1, at least two sound transducers, at least one control unit and a plurality of amplifiers.
  • Each of the sound transducers is attached to two ends of the cylindrical tube 1 for generating sound waves 6 inside the cylindrical tube 1 from both ends of the cylindrical tube 1.
  • the generated sound waves 6 from both ends are in opposite direction to each other for creating a standing wave inside the cylindrical tube 1.
  • the cylindrical tube 1 is provided with a plurality of holes for allowing air flow between the cylindrical tube 1 and the cooking environment.
  • the holes (2, 3) are provided in the cylindrical tube 1 on locations of nodes 8 and antinodes 7 of the standing wave that pass through the cylindrical tube 1.
  • the standing waves create precise pressure variations in specific volumes of the cylindrical tube 1 which in turn sucks unwanted gases and scattered fluids from the cooking environment thereby to create air flow in desired directions.
  • the present invention can be implemented in the fields of ventilation systems, aspirators, oven, cookers, cook-tops, heaters, home appliances and for similar ventilation requirements.
  • control unit is provided to control the generation of the sound wave 6 from the sound transducer and also to control phase and amplitude of the sound wave.
  • control unit adjusts the phase and amplitude of the sound waves 6 which in turn adjust the pressure variation inside the cylindrical tube 1 to increase the ventilation process.
  • the plurality of amplifiers provided are able to boost the sound waves 6.
  • the sound transducer generates the standing wave in same frequency and phase.
  • the frequency of the standing wave is related to the distance between the holes (2, 3) on the cylindrical tube 1, and wherein the distance between holes fits a wavelength of the standing wave.
  • the phase of the standing wave is related to a position of the sound transducer from the holes in the cylindrical tube 1.
  • the apparatus may include an array of cylindrical tubes 1 to increase the ventilation.
  • the holes (2, 3) are provided in the cylindrical tube 1 on locations of nodes 8 of the standing wave which allows the air flow 5 from the cylindrical tube 1 to outside environment.
  • the holes 2 are provided in the cylindrical tube 1 on locations of antinodes 7 of the standing wave which allows the air flow 4 from the outside environment to the cylindrical tube 1.
  • ⁇ V 2 2 P 0 ⁇ P 1
  • V P 0 ⁇ P 1
  • Fig. 2 illustrates an exemplary model of two sound waves 200 traveling in a direction opposite to each other with a phase difference according to the present invention.
  • Standing sound waves 6 are generated by sound sources (sound transducer) traveling in a direction opposite to each other (inverse direction) and have a specific frequency and phase.
  • Inverse directional sound waves (9, 10) can be generated by using multiple sound sources or more commonly by a method of reflection, which is not preferred in this invention because of attenuation in the medium.
  • An example of two inverse directional waves is shown in Figure 3 with the phase difference.
  • the sound transducer generates the standing wave in the same frequency and with a different phase.
  • the frequency of the standing wave is related to the distance between the holes on the cylindrical tube 1, and wherein the distance between holes (2, 3) fits a wavelength of the standing wave.
  • the phase of the standing wave is related to a position of the sound transducer from the holes in the cylindrical tube 1.
  • Fig. 3 illustrates an exemplary model of a resultant standing wave 300 generated for two sound waves 6 with different phase according to the present invention.
  • An example of resulting standing wave 11 is shown in Figure 3 due to the phase difference between two inverse directional sound waves 6 generated in the cylindrical tube 1.
  • the change in phase of the sound wave due to air flow generates the resultant standing wave for sucking the unwanted gases and the scattered fluids from the cooking environment.
  • a method for ventilating cooking environment preferably comprises the steps: generating a standing wave inside a cylindrical tube 1 using a sound transducer provided at each end of the cylindrical tube 1, generating the standing wave in a same frequency and phase, allowing air flow between the cylindrical tube 1 and the cooking environment through a plurality of holes provided at the cylindrical tube 1s, allowing the standing wave to create a pressure gradient inside the cylindrical tube 1, and ventilating the cooking environment using the pressure gradient inside the cylindrical tube 1.
  • Each of the sound transducers are attached to two ends of the cylindrical tube 1 for generating sound waves 6 inside the cylindrical tube 1 from both the ends of the cylindrical tube 1.
  • the generated sound waves 6 from both ends are in opposite direction to each other for creating a standing wave inside the cylindrical tube 1.
  • the cylindrical tube 1 is provided with plurality of holes (2, 3) for allowing air flow between the cylindrical tube 1 and the cooking environment.
  • the holes are provided in the cylindrical tube 1 on locations of nodes 8 and antinodes 7 of the standing wave that pass through the cylindrical tube 1.
  • the standing waves create precise pressure variations in specific volumes of the cylindrical tube 1 which in turn sucks unwanted gases and scattered fluids from the cooking environment thereby to create air flow in desired directions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
EP17199195.3A 2017-10-30 2017-10-30 Schallschlauchaspiratorvorrichtung Withdrawn EP3477208A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP17199195.3A EP3477208A1 (de) 2017-10-30 2017-10-30 Schallschlauchaspiratorvorrichtung
TR2017/18995A TR201718995A2 (tr) 2017-10-30 2017-11-28 Akusti̇k borulu aspi̇rator aparati

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17199195.3A EP3477208A1 (de) 2017-10-30 2017-10-30 Schallschlauchaspiratorvorrichtung

Publications (1)

Publication Number Publication Date
EP3477208A1 true EP3477208A1 (de) 2019-05-01

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP17199195.3A Withdrawn EP3477208A1 (de) 2017-10-30 2017-10-30 Schallschlauchaspiratorvorrichtung

Country Status (2)

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EP (1) EP3477208A1 (de)
TR (1) TR201718995A2 (de)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4218921A (en) 1979-07-13 1980-08-26 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Method and apparatus for shaping and enhancing acoustical levitation forces
US4393708A (en) 1981-10-26 1983-07-19 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Acoustic system for material transport
US4688199A (en) 1984-07-06 1987-08-18 Internationale Octrooi Maatschappij "Octropa" Bv Transducers and control means
US4962330A (en) 1989-03-21 1990-10-09 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Acoustic transducer apparatus with reduced thermal conduction
US6079214A (en) * 1998-08-06 2000-06-27 Face International Corporation Standing wave pump
US20030124006A1 (en) * 2001-12-27 2003-07-03 Dooley Kevin Allan Standing wave excitation cavity fluid pump

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4218921A (en) 1979-07-13 1980-08-26 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Method and apparatus for shaping and enhancing acoustical levitation forces
US4393708A (en) 1981-10-26 1983-07-19 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Acoustic system for material transport
US4688199A (en) 1984-07-06 1987-08-18 Internationale Octrooi Maatschappij "Octropa" Bv Transducers and control means
US4962330A (en) 1989-03-21 1990-10-09 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Acoustic transducer apparatus with reduced thermal conduction
US6079214A (en) * 1998-08-06 2000-06-27 Face International Corporation Standing wave pump
US20030124006A1 (en) * 2001-12-27 2003-07-03 Dooley Kevin Allan Standing wave excitation cavity fluid pump

Also Published As

Publication number Publication date
TR201718995A2 (tr) 2019-05-21

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