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WO2013007537A2 - Production d'un courant d'air au moyen d'oscillations - Google Patents

Production d'un courant d'air au moyen d'oscillations Download PDF

Info

Publication number
WO2013007537A2
WO2013007537A2 PCT/EP2012/062704 EP2012062704W WO2013007537A2 WO 2013007537 A2 WO2013007537 A2 WO 2013007537A2 EP 2012062704 W EP2012062704 W EP 2012062704W WO 2013007537 A2 WO2013007537 A2 WO 2013007537A2
Authority
WO
WIPO (PCT)
Prior art keywords
plate
turbomachine
air flow
vibration
chladni
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.)
Ceased
Application number
PCT/EP2012/062704
Other languages
German (de)
English (en)
Other versions
WO2013007537A3 (fr
Inventor
Franz Bernitz
Martin Honsberg-Riedl
Gerhard Mitic
Randolf Mock
Thomas Vontz
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.)
Osram GmbH
Original Assignee
Osram GmbH
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 Osram GmbH filed Critical Osram GmbH
Publication of WO2013007537A2 publication Critical patent/WO2013007537A2/fr
Publication of WO2013007537A3 publication Critical patent/WO2013007537A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • 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
    • 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
    • F04B45/00—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids
    • F04B45/08—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having peristaltic action
    • F04B45/10—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having peristaltic action having plate-like flexible members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/60—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air
    • F21V29/63—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air using electrically-powered vibrating means; using ionic wind
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the invention relates to a turbomachine with a
  • a vibration excitable air flow generating unit wherein the air flow generating unit comprises a Chladni resonator having at least one resonant excitable plate.
  • the invention further relates to a lighting device, comprising at least one such flow machine for cooling
  • the invention also relates to a method for generating an air flow, in particular
  • Air flow generating unit to vibrations The invention is particularly advantageously applicable for cooling of LED lamps and / or lamps that can be equipped with them.
  • DE 10 2008 038 549 A1 discloses a method for generating an air flow by means of ultrasound, specifically for the cooling of small electronic circuits, for example electronic ballasts. Described is a device for generating an air flow with a
  • Oscillating element of the excitation element to vibrations can be excited and the vibrations lead to an air flow.
  • the connecting element may be formed frusto-conical and be completed at its lid and bottom surface of the vibrating element and the excitation element. Specifically, it is proposed that a
  • piezoelectric actuator with a front mounted
  • Vibration minima which e.g. can be made visible by sprinkling the plate with sand (creation of Chladnic sound figures).
  • a resonantly oscillating or intrinsically vibrating plate may also be referred to as a Chladni resonator.
  • the object is achieved by a turbomachine with an airflow generating unit that can be excited to oscillate, wherein the airflow generating unit has a Chladni resonator with at least one resonantly excitable plate.
  • Machine takes place in an open space through a flow according to the laws of fluid dynamics via the detour of kinetic energy.
  • This turbomachine has the advantage that its air flow generating unit is particularly flat ausgestaltbar. Also like the air flow generating unit without special
  • this turbomachine can be simple and inexpensive
  • Air flow generating unit, etc. have.
  • the turbomachine can bring or promote another gaseous medium than air to the flow.
  • the description of this invention is not limited to "air,” and a reference to air may include, in particular, any gaseous medium.
  • the plate can be excited by means of at least one volumetric actuator.
  • any actuator that can change its material volume by means of an external control signal can be understood as a volumetric actuator.
  • a volumetric actuator may include an electrostrictive actuator or a magnetostrictive actuator. Due to its robustness, compact design, its comparatively inexpensive
  • a piezoelectric actuator or piezoelectric actuator is particularly preferred.
  • the actuator can in particular be glued to the plate.
  • the plate can be excited by means of a matrix-like array of actuators.
  • vibration amplitudes can be achieved across the plate.
  • the actuators may be individually or in groups controllable to produce a predetermined resonance pattern.
  • the plate may also be e.g. be stimulated by a, in particular central, actuator to natural oscillations or to resonance.
  • the at least one volumetric actuator is configured as a piezoactuator plate. So can a particularly flat and
  • At least about 100 kHz, in particular of at least about 200 kHz, can be excited.
  • a strong air flow can be generated at an (ultrasonic) frequency that is no longer audible for humans and most animals.
  • Metal plate is.
  • a metal plate is particularly easy excitable to natural vibrations with high amplitudes, inexpensive available and simply variable in their properties
  • Plastic plate is, which can be particularly light, durable and inexpensive. It is a development that the plastic plate is connected to a piezoelectric plastic film.
  • the piezoelectric plastic film serves as an actuator or actuator field and can in particular with the
  • the piezoelectric plastic film may consist in particular of polyvinylidene fluoride (abbreviation PVDF).
  • Ceramic plate is.
  • the ceramic used may in particular be a ceramic with a low acoustic attenuation. If the at least one actuator, in particular piezoelectric actuator, is a ceramic actuator, the at least one actuator can be sintered to the plate to form a piece.
  • the webs can hold or fasten the plate to a frame.
  • the frame and the plate can off be worked out a full-surface layer or (semi-finished or output) plate, in particular by introducing corresponding recesses, for example by means of a
  • Laser ablation in particular laser cutting.
  • the air flow generating unit may have a plurality of resonant excitable plates. It is an advantageous for a little disturbing suspension
  • the plate is a polygonal plate at the corners attach the webs.
  • the plate may be e.g. also be a round or oval plate, etc., in which case the webs can then in particular be equidistant.
  • a Matter beatlement is present, which mechanically connects this area with a vibration unit, so that the vibration unit can be excited from this area to vibrations. So the transformer element may vibrate particularly strong, thus causing a particularly strong vibration of the vibration unit and thus a particularly strong flow of cooling air.
  • a transformer element is present, which mechanically connects this area with a vibration unit, so that the vibration unit from this area to vibrations
  • the air flow generating unit can be adapted to a high quality factor, which can also cause a particularly strong vibration of the vibration unit and thus a particularly strong flow of cooling air.
  • the air flow generating unit can also be at a high
  • the positions of the vibration minima and vibration maxima forming on the plate during operation need not coincide with a position of the at least one actuator. It is a preferred development for a particularly durable connection between the at least one actuator, in particular adhered actuator, and the plate, that the actuator is arranged in the region of a vibration minimum.
  • the transformer element has a conical basic shape, which tapers from the plate to the vibration unit. This can be a
  • At least the transformer element has a plurality of layers or is composed of such layers (ie is a layered body).
  • An advantage consists in the production of at least the transformer element by simple layering, in particular by means of pre-structured layers or
  • the transformer element makes use of the fact that an outer contour which is favorable for the function does not necessarily have to be smooth, since in the case of typical, sufficiently large wavelengths generated by the plate of the Chladni resonator, the Suggestions about the existing in this structure stages away.
  • the vibration unit is thus also constructed of one or more layers. It is also an embodiment that the plate as
  • a lighting device comprising at least one turbomachine for cooling at least one light source, wherein the at least one
  • Turbomachine a turbomachine as described above.
  • the lighting device may be a lamp, a module, a
  • the lighting device may be a luminaire, e.g. a ceiling light, which has a reflector.
  • the reflector (or a reflector of another lighting device) can be used as the
  • Semiconductor light source at least one light emitting diode.
  • a color may be monochrome (e.g., red, green, blue, etc.) or multichrome (e.g., white). This can also be done by the at least one
  • LED emitted light is an infrared light (IR LED) or an ultraviolet light (UV LED).
  • IR LED infrared light
  • UV LED ultraviolet light
  • Several Light emitting diodes can produce a mixed light; eg a white mixed light.
  • the at least one light-emitting diode may contain at least one wavelength-converting phosphor
  • the phosphor may alternatively or additionally be arranged away from the light-emitting diode
  • the at least one light-emitting diode can be in the form of at least one individually housed light-emitting diode or in the form of at least one LED chip. Several LED chips can be mounted on a common substrate (“submount").
  • the at least one light emitting diode may be equipped with at least one own and / or common optics for beam guidance, e.g. at least one Fresnel lens,
  • OLEDs organic LEDs
  • the at least one semiconductor light source may be e.g. have at least one diode laser.
  • Stimulating a plate of a Chladni resonator comprises. This method allows the same advantages as the
  • Lighting device and can be configured analog.
  • Fig.l shows in a view obliquely from above one
  • Air flow generating unit in plan view; 4 shows a top view of a section of a
  • Air flow generating unit according to a second
  • FIG. 5 shows a lighting device with a
  • Air flow generating unit according to the first or the second embodiment.
  • Fig.l shows in a view obliquely from above one
  • Air flow generating unit 1 is composed of a plurality of layered plates 3 to 7.
  • Chladni plate is a full-surface plate.
  • the Chladni plate 3 has thirty-five at its bottom
  • the piezo actuators 9 are here in an mxn matrix pattern with, for example, m equal to seven and n equal to five
  • the piezo actuators 9 can via electrical
  • Subareas 4a to 7a are arranged analogously to the piezo actuators 9 in a congruent 7x5 matrix pattern.
  • the portions 4a to 7a are arranged in particular in the same pattern on the plates 4 to 7, that superposed portions 4a to 7a and a
  • piezoelectric actuator 9 arranged underneath piezoelectric actuator 9 are arranged concentrically with each other.
  • the subregions 4a to 7a are integrally connected to a remaining layer frame 4b to 7b via in each case three webs 8.
  • the webs 8 are the
  • Subareas 4a to 7a capable of oscillation in the respective
  • Vibration properties of the subregions 4a to 7a are then also determined by the properties of the webs 8, e.g. their number, dimensions and / or material determined.
  • the number of lands 8 per subregion 4a to 7a can be variably selected, e.g. in terms of a desired strength.
  • Partial separation may e.g. by means of an etching process, a stamping process or a laser structuring,
  • sections 4a, 5a, 6a have the same circular basic shape, but with increasing distance from the
  • Chladni plate 3 smaller in area (here: in diameter).
  • the shape of the transformer element 4a, 5a, 6a is thus stepped frustoconical.
  • Vibration plate 7 may consist of a different material.
  • the plates 4 to 7 may be made of metal, plastic and / or ceramic.
  • the plates 3 to 7 are connected to a solid layer stack.
  • Fig. 2 shows a sectional side view of a section of the air flow generating unit 1 in the region of a transformer element 4a to 6a.
  • an electrical signal in particular an alternating voltage
  • this stimulates mechanical oscillations (in particular acoustic vibrations, in particular ultrasonic vibrations of at least 100 kHz).
  • the vibrations are transmitted to the Chladni plate 3, which thereby
  • Natural oscillations is stimulated.
  • the natural oscillations of the Chladni plate 3 are further transmitted to the transformer element 4a, 5a, 6a, and from there on to the
  • the transformer element 4a, 5a, 6a reinforces a due to its tapered shape
  • the oscillation unit 7a in turn generates a desired air flow.
  • the material and / or the thickness of the partial regions 4a to 6a and / or the partial region 7a can be designed for a low vibration damping and / or for a strong excitation of the partial region 7a.
  • the Chladni plate 3 has a rectangular shape and is connected at its corners via webs 12 with a frame 13. By means of the webs 12 remains the edge of the Chladni plate. 3
  • Regions 14 of the Chladni plate 3 are dashed
  • Transmitter elements 4a, 5a, 6a and vibration units 7a in a frame 4b to 7b it can at a large lateral expansion with many transformer elements 4a, 5a, 6a and vibration units 7a happen that a
  • Air supply to the vibration units 7a is not uniform, since at the edge of the air flow generating unit 1 located vibration units 7a are better supplied with air than internally arranged vibration units 7a. However, this may decrease the efficiency of the airstream generation and hence the cooling performance from outside to inside. To add an air supply or air forward to the vibration units 7a
  • Airflow generating unit 15 shown in Figure 4, laterally of the occupied by the piezo actuators 9 areas 14 of the Chladni plate 3 air ducts 16 may be present in the air flow generating unit 15.
  • the air channels pass through the stacked layer frames 4b to 7b. Thereby, air from a rear side of the air flow generating unit 15 to the
  • Front side which has the vibration units 7a, sucked or tracked.
  • a contour of the air ducts 16 can, as shown in Figure 4, for a good utilization of space substantially the shape of the
  • the contour of the air channels may be shaped, in particular, by simple geometric shapes, e.g. a circular shape, oriented to simplify manufacture.
  • the airflow generating unit 15 may be formed in particular like the airflow generating unit 1.
  • FIG. 5 shows a lighting device R with a
  • Turbomachine H which has an air flow generating unit 1 or 15.
  • the lighting device R furthermore has two semiconductor light sources, in particular LEDs, L, which are cooled by means of a cooling air flow K generated by the air flow generation unit 1 or 15.
  • a turbomachine H having the air flow generating unit 1 can be used in addition to the
  • Airflow generating unit 1 e.g. also electric
  • Vibration units 7a also laterally offset to the
  • Piezo actuators 9 may be arranged.
  • the transformer elements 4a, 5a, 6a may rest on areas of the Chladni plate 3, which are not covered by (also on the other side) piezoactuators 9.
  • a particularly high oscillation amplitude of the Chladni plate 3 can be exploited if the regions 14 regions of low oscillation amplitude (including a
  • exemplary embodiments may include transformer elements 4a, 5a, 6a arranged in a 6 ⁇ 4 matrix field between the free points present in the 7 ⁇ 5 matrix field
  • the transformer elements 4a, 5a, 6a may overlap with the areas 14 covered by piezoactuators 9 or even rest thereon, as shown above. Although the regions 14 may have a comparatively low oscillation amplitude, but the transformer elements 4a, 5a, 6a resting thereon may cause a particularly high quality factor.
  • transformer elements 4a, 5a, 6a and the vibration units 7a on areas of the Chladni plate 3 which correspond to areas with oscillation maxima, areas with oscillation minima or areas between them.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

La présente invention concerne une machine de production de courant (H) comprenant une unité de production de courant d'air (1) qui peut être mise en oscillations, l'unité de production de courant d'air (1) présentant un résonateur de Chladni (3, 9) comprenant au moins une plaque (3) qui peut être mise en résonance. Un dispositif lumineux (R) présente au moins une machine de production de courant (H) destinée à refroidir au moins une source de lumière (L). Le procédé de l'invention sert à produire un courant d'air de refroidissement (K), le procédé comprenant l'excitation d'une plaque (3) d'un résonateur de Chladni (3, 9). L'invention s'applique de manière particulièrement avantageuse au refroidissement de lampes à DEL et/ou de dispositifs d'éclairage pouvant être équipés de celles-ci
PCT/EP2012/062704 2011-07-08 2012-06-29 Production d'un courant d'air au moyen d'oscillations Ceased WO2013007537A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011078853.0A DE102011078853B4 (de) 2011-07-08 2011-07-08 Erzeugung eines Luftstroms mittels Schwingungen
DE102011078853.0 2011-07-08

Publications (2)

Publication Number Publication Date
WO2013007537A2 true WO2013007537A2 (fr) 2013-01-17
WO2013007537A3 WO2013007537A3 (fr) 2013-09-12

Family

ID=46614437

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/062704 Ceased WO2013007537A2 (fr) 2011-07-08 2012-06-29 Production d'un courant d'air au moyen d'oscillations

Country Status (2)

Country Link
DE (1) DE102011078853B4 (fr)
WO (1) WO2013007537A2 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021081009A1 (fr) * 2019-10-20 2021-04-29 Respira Technologies, Inc. Dispositifs électroniques pour l'aérosolisation et l'inhalation de liquide
US11517685B2 (en) 2019-01-18 2022-12-06 Qnovia, Inc. Electronic device for producing an aerosol for inhalation by a person
US11690963B2 (en) 2018-08-22 2023-07-04 Qnovia, Inc. Electronic device for producing an aerosol for inhalation by a person
US12156547B2 (en) 2018-08-22 2024-12-03 Qnovia, Inc. Electronic device for producing an aerosol for inhalation by a person
US12279650B2 (en) 2022-04-22 2025-04-22 Qnovia, Inc. Electronic devices for aerosolizing and inhaling liquid having an enclosed interior air passageway with diaphragm and pressure sensor
US12471625B2 (en) 2020-11-01 2025-11-18 Qnovia, Inc. Electronic devices and liquids for aerosolizing and inhaling therewith
US12484618B2 (en) 2023-04-21 2025-12-02 Qnovia, Inc. Electronic devices for aerosolizing and inhaling liquid having diaphragm and a pressure sensor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008038549A1 (de) 2008-08-20 2010-03-04 Siemens Aktiengesellschaft Erzeugung eines Luftstroms mittels Ultraschall

Family Cites Families (5)

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Publication number Priority date Publication date Assignee Title
EP1828601A1 (fr) * 2004-12-22 2007-09-05 Matsushita Electric Works, Ltd. Appareil de regulation des debits de liquide
DE102007037862A1 (de) * 2007-08-10 2008-10-30 Siemens Ag Entwärmung mittels einer Membranpumpe
EP2306018B1 (fr) * 2008-06-03 2016-05-11 Murata Manufacturing Co. Ltd. Microsoufflante piézoélectrique
DE102009014486A1 (de) * 2009-03-23 2010-09-30 Zumtobel Lighting Gmbh Anordnung zur Lichtabgabe mit Leuchtelementen
DE102010039828B4 (de) * 2010-08-26 2014-10-30 Osram Gmbh Leuchtvorrichtung mit aktiver Kühlvorrichtung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008038549A1 (de) 2008-08-20 2010-03-04 Siemens Aktiengesellschaft Erzeugung eines Luftstroms mittels Ultraschall

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11690963B2 (en) 2018-08-22 2023-07-04 Qnovia, Inc. Electronic device for producing an aerosol for inhalation by a person
US12156547B2 (en) 2018-08-22 2024-12-03 Qnovia, Inc. Electronic device for producing an aerosol for inhalation by a person
US11517685B2 (en) 2019-01-18 2022-12-06 Qnovia, Inc. Electronic device for producing an aerosol for inhalation by a person
WO2021081009A1 (fr) * 2019-10-20 2021-04-29 Respira Technologies, Inc. Dispositifs électroniques pour l'aérosolisation et l'inhalation de liquide
US12471625B2 (en) 2020-11-01 2025-11-18 Qnovia, Inc. Electronic devices and liquids for aerosolizing and inhaling therewith
US12279650B2 (en) 2022-04-22 2025-04-22 Qnovia, Inc. Electronic devices for aerosolizing and inhaling liquid having an enclosed interior air passageway with diaphragm and pressure sensor
US12484618B2 (en) 2023-04-21 2025-12-02 Qnovia, Inc. Electronic devices for aerosolizing and inhaling liquid having diaphragm and a pressure sensor

Also Published As

Publication number Publication date
DE102011078853A1 (de) 2013-01-10
WO2013007537A3 (fr) 2013-09-12
DE102011078853B4 (de) 2014-01-23

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