EP2122178B1 - Mit einem kompressor und einer wirbelvorrichtung ausgestattete klimaanlage - Google Patents

Mit einem kompressor und einer wirbelvorrichtung ausgestattete klimaanlage Download PDF

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Publication number
EP2122178B1
EP2122178B1 EP08761940A EP08761940A EP2122178B1 EP 2122178 B1 EP2122178 B1 EP 2122178B1 EP 08761940 A EP08761940 A EP 08761940A EP 08761940 A EP08761940 A EP 08761940A EP 2122178 B1 EP2122178 B1 EP 2122178B1
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Prior art keywords
air
blades
axial
conditioner
flow
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EP08761940A
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English (en)
French (fr)
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EP2122178A1 (de
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Georges Mugnier
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GENIUS
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/02—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal
    • F04D17/025—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal comprising axial flow and radial flow stages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
    • F25B9/004—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being air

Definitions

  • the invention relates to the technical sector of air conditioning units with reversible production of hot air distribution or cold air.
  • a first is to generate condensation effect due to heat exchange inherent in the compression of certain gases.
  • a second disadvantage is that current air conditioners are often associated with refrigerant fluids with the production of environmentally harmful gases with a much higher warming potential than CO2 (up to 2,000 times more), of which leaks are frequent and end-of-life recycling is contained.
  • CO2 heating potential
  • filtration device it also appears that current air conditioning systems are sometimes the source of development and spread of certain bacteria that cause legionellosis. Extensive research has been conducted by many manufacturers of air conditioners, but it is found in practice that some or all of the aforementioned disadvantages remain.
  • the first object of the invention was to eliminate the effect of condensation by no longer using components of the air conditioner generating them, and therefore without the use of refrigerant fluids.
  • a second aim of the invention was to design a new air conditioner to avoid any risk of pollution of the environment.
  • a third goal sought was to design an air conditioner in economically competitive manufacturing conditions compared to current air conditioners and can find a wide variety of applications.
  • the concept used by the air conditioner refers to the use of fluid mechanics without the addition of gas to perform the desired functions. This concept is known from the document US 4051689 .
  • the air conditioner is remarkable in that it comprises, arranged and arranged in a reception chamber and successively, a first means in the form of an axial compressor provided with blades on its periphery and powered by an integrated motor unit driving the circulation of air at a given speed, a second means in the form of an axial stator stator whose function is to create a static pressure greater than the atmospheric pressure by transferring the air stream obtained in a third means in the form of a static centrifugal compressor whose function is to create a rotational flow with a static pressure fluctuating as a function of the temperature rise throughout the flow, the air stream being conveyed in a fourth means constituted by an axial diffuser rectifier, said rectifier being hollow internally for the circulation of ambient air and having externally for the purpose of straightening the vortex flow in axial flow and to relax the pressure, and in that a fifth means constituted by a transfer valve fits around the fourth means for regulating or not the passage of hot air, with adding ambient air, and in
  • the air conditioner apparatus is represented as a whole by (A), and integrates into an installation (I) shown figure 1 .
  • the air-conditioning unit is integrated in an outer protective casing (1) arranged with fixing brackets (1a) or any other means of fixing brackets.
  • This housing has a parallelepipedal shape for example, and comprises side end flanges (1b) (1c) from which are disposed means known per se, namely from the flange (1b) a conduit (2) projecting into a double-flow air distributor (3), an air distribution valve (4) projecting into a duct (5) associated with an inlet duct (6) fixed on a suitable support plane (P), wall or other.
  • This air distributor duct also receives a carbon filtration device (7) purification for the air inlet.
  • At the outlet of the air conditioner is located from the flange (1c) a duct (8) of hot or cold air outlet overflowing on a pipe (9) outlet and discharge also fixed on the support plane (P) appropriate .
  • This air conditioner comprises a plurality of means arranged and successively arranged in alignment in a receiving chamber (10), itself integrated and protected by the housing (1) above.
  • This enclosure (2) is of cylindrical configuration for example by being made in two cylindrical half-portions (10a-10b) which have along their outer longitudinal edge strips (10c) allowing their connection and fixing by means type bolting or others. The different components of the air conditioner are thus positioned and fixed to each other and also relative to said enclosure.
  • the first means (11) is thus the axial compressor represented in FIGS. Figures 4 and 5 . It comprises a cylindrical body (11b) receiving on its periphery a plurality of blades (11a), made for example of aluminum, and front portion (11c) in the form of ogive. Said blades are treated on the surface of their underside by glass-ball blasting, this treatment having the function of hardening the corresponding surface to restore a creep created by the rotation of the rotor compressor and avoiding the deformation of the speed triangles on the blades.
  • the axial compressor is thus mounted on a conical axis (12a) to the engine group illustrated figure 16 .
  • Said blades (11a) have a helical configuration with facing base profiles (11a1) of two diverging adjacent blades to improve the flow of air velocity.
  • the calculation of the speed triangles of the blades is designed in such a way that it produces a high speed axial cylindrical air flow.
  • the distribution of the air veins along the blade remains constant, on the same axis, so as not to disturb the air mass in general.
  • the motor group (12) illustrated figure 16 thus comprises a shaft (12b) associated with the motor (12c) and protective casing (12d), a fixing flange (12e) of the motor.
  • the shaft (12b) has a conical head (12a) for receiving support of the axial compressor (11).
  • the connection of the axial compressor (11) to said conical portion is established in any suitable manner, the axial compressor being arranged complementary to fit.
  • the second means (13) is the axial diffuser stator which is fixed and secured to the casing (10) by any appropriate connecting means. This second means (13) is located on the shaft portion (12c) between the attachment flange (12e) and the conical portion (12a).
  • the diffuser stator comprises 10 blades (13a) for example of aluminum.
  • the connection with the envelope (11) is effected by the end of the blades (13a).
  • These blades (13a) are arranged in the extension of the blades (11a) formed on the compressor, but unlike these which have a helical configuration, the blades (13a) are arranged in the longitudinal axial direction of the axial stator stator. They have a symmetrical configuration with a progressive entry (13a1), and a second part (13a2) degressive, so as to form a teardrop profile.
  • the examination of the two successive blades shows an entry of convergent profiles, then out of divergent profiles with an intermediate zone of narrowing with a neck (13a3).
  • the front configuration in the first section of the blades allows an acceleration of the air flow and its speed, while the second part causes a significant drop in speed and contributes to the elevation of the pressure gradient.
  • the folded geometrical shape of the blades (13a) gives a suitable orientation to the flow of air before admission to the following means, namely the static centrifugal compressor.
  • This axial stator stator comprises plenums located upstream and downstream of itself, these means not being represented. The purpose of these chambers is to create a static pressure higher than the atmospheric pressure.
  • This compressor (14) comprises a tubular body (14a) fitting around the engine block (12) and receiving according to a particular characteristic two sets of primary (14b) and secondary (14c) blades of different characteristics.
  • the first series of blades (14b) comprises five blades arranged helically with geometry and variable pitch.
  • These primary blades (14b) are developed so as to make a complete revolution around the receiving body (14a) in the configuration shown figure 9 .
  • Said blades are initially parallel to each other in a pre-established space to allow positioning of the other series of secondary blades (14c) established at a much lower amplitude.
  • Said secondary blades have a twisted configuration corresponding to the starting profile of the primary blades (14b), said blades (14c) being of less length in a ratio of 1 to 2 or 1 to 3.
  • the centrifugal compressor statically, one distinguishes the positioning of the set of blades (14b-14c) arranged alternately with an identical spacing.
  • the other end of the static centrifugal compressor only shows the ends of the primary blades. There is therefore a tightening of the space established between the successive blades (14b) creating the swirling flow.
  • the inlet portions of the blades (14b-14c) are all in the longitudinal axial direction of the body, while the rear outlet ends of the primary blades are in a radial plane. It should also be noted that, to facilitate the circulation of the air fluid, the front and rear ends of all types of blades are tapered.
  • each side of the blade is concave without special surface treatment.
  • the static centrifugal compressor (14) makes it possible to transform the axial air flow coming from the means (13) into a rotational flow in order to accelerate it, while maintaining the static pressure established at the outlet of the diffuser stator. axial (13).
  • Centrifugation is achieved by reversing the axial airflow along the blades and combining the swirling effects given by the different types of blades.
  • the blades are constructed by projecting several unregulated surfaces according to the development of velocity triangles on the generatrix of the center of mass and the inertial center of each surface. These surfaces are then projected by winding on the final surface of each blade, to give a gyratory effect to the flow of air.
  • the rotational flow is created, there is an increase in pressure on the surfaces, due to the centrifugal force created by the winding of the flow and the restreatment of the convergent duct between the bearing surfaces.
  • the static pressure fluctuates as a function of the temperature rise throughout the journey.
  • the characteristics of the fourth means (15) constituted by the axial diffuser rectifier shown in FIG. figure 10 The latter is located in axial extension of the means (14). It is constituted by a hollow cylindrical body (15a) capable of surrounding the motor unit (12c), by circulating ambient air.
  • the axial diffuser rectifier On its periphery, the axial diffuser rectifier has a plurality of blades (15b) for example of aluminum 14 in number, arranged in a curvilinear configuration.
  • the blades in the entrance zone have a range separation distance smaller than that existing at the rear end of said blades, creating a divergent effect, and the orientation of the blades at the rear end is in the longitudinal axis of the rectifier.
  • the air inlet area from the means (14) is set to be an extension of the air outlet from the means (14).
  • This means (15) is intended to straighten the vortex flow in axial flow and to slightly relax the pressure, in order to lower the temperature of the circulating air before admission into the sixth means (17) constituted by a vortex.
  • the rectifier (15) is fixed in the envelope (10) by being fixed in any suitable manner.
  • This axial diffuser rectifier is capable of cooperating and allowing the positioning and fitting of a fifth means (16) constituted by a transfer valve. It has a cylindrical body (16a) coming into the body (15a) of the rectifier (15), and it has a flange (16b) projecting cylindrical configuration.
  • This ring-shaped collar is arranged with a plurality of lights (16c) allowing a passage and an air flow in the body (16a).
  • On the ring (16b) is reported and positioned a ring (20) of complementary shape may be rotated angularly relative to said ring (16b).
  • the ring itself has solid parts (20a) in the form of a cover which have shapes and dimensions complementary to the slots (16c) for closing them in whole or in part according to the position of the ring on the ring (16b). ).
  • Adjusting means (21) and driving the ring on the ring gear is thus disposed on the body of the rectifier (15) to allow the appropriate angular orientation of the transfer valve.
  • the sixth means (17) constituted by a vortex.
  • This corresponds to the cylindrical disc (17a) hollow in its central part and receiving a plurality of blades (17b) for example of aluminum, 10 in number for example. These blades are arranged in a star configuration with a truncated cone.
  • This vortex has the function of giving a stable and constant speed to the flow of air by a rotational movement between the blades, and it prepares the transfer of air flow produced in the expansion chamber (18) producing the cold disposed downstream. It has a cylindrical configuration with a nose (18a) ogive.
  • the air conditioning thus constituted by all these means allows the production of hot or cold air according to temperature ranges adapted according to the applications of the invention, and this, thanks to the combination of the circulatory effects of air given by the various means described.
  • the power unit and the transfer valve and their controls are connected to a computer-controlled digital card via an RS232 or other socket.
  • the air conditioning according to the invention responds to the various problems posed.
  • the configuration (11) of these various components and means and the number of blades is given as an example in the context of an optimization of operation of the air conditioner.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Air Conditioning Control Device (AREA)
  • Wind Motors (AREA)

Claims (13)

  1. Klimagerät, dadurch gekennzeichnet, dass es - nacheinander in einem Aufnahmemantel (10) angeordnet - eine erste Einrichtung (11) in Form eines Axialverdichters umfasst, der an seinem Rand mit Flügeln (11a) versehen ist und durch ein integriertes Motoraggregat (12) gespeist wird, das die Luftumwälzung mit einer gegebenen Geschwindigkeit bewirkt, dann eine zweite Einrichtung (13) in Form eines axialen Gleichrichter-Stators, der die Aufgabe hat, einen statischen Druck zu schaffen, der höher ist als der atmosphärische Druck, und den Luftstrom in eine dritte Einrichtung (14) in Form eines statischen Radialverdichters zu übertragen, der die Aufgabe hat, einen Rotationsstrom mit einem - abhängig von der Temperaturerhöhung entlang des Stroms - schwankenden statischen Druck zu erzeugen, wobei der Luftstrom in eine vierte Einrichtung (15) geleitet wird, die aus einem axialen Diffusor-Gleichrichter besteht, wobei der besagte Gleichrichter für die Raumluftzirkulation innen hohl ist und außen die Funktion hat, den Wirbelstrom in einen Axialstrom gleichzurichten und den Druck zu mindern, und dass eine fünfte Einrichtung (16) bestehend aus einem Transferventil sich um die vierte Einrichtung herum anpasst, um die Passage von Heißluft - mit Zufligung von Raumluft - zu regulieren oder nicht, und dass eine sechste Einrichtung (17) bestehend aus einem Wirbel die Beschleunigung des Luftstroms in einem Wirbeleffekt ermöglicht, bevor dieser in eine siebte Einrichtung (18) gelangt, die aus einer die Kälte produzierenden Expansionskammer besteht, und in den finalen Luftverteiler mit gewählten Temperaturbedingungen geleitet wird,
    und dass sämtliche Einrichtungen (11, 12, 13, 14, 15, 16, 17, 18) in einem Schutz- und Verbindungsmantel (10) angeordnet sind.
  2. Klimagerät nach Anspruch 1, dadurch gekennzeichnet, dass die erste Einrichtung (11) ein Axialverdichter mit einem zylindrischen Körper (11b) ist, der an seinem Rand mehrere Flügel (11a) aufnimmt und im vorderen Teil (11c) sprengkopfartig ausgebildet ist, wobei der Axialverdichter auf einer konischen Achse (12a) des Motoraggregats (12) angebracht ist und die besagten Flügel (11a) als Luftschraube mit einander zugewandten Basisprofilen (11a1) von zwei divergierenden angrenzenden Flügeln konfiguriert sind.
  3. Klimagerät nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, dass das Motoraggregat (12) eine mit dem Motor (12c) und Schutzgehäuse (12d) verbundene Welle (12b) und einen Befestigungsflansch (12e) des Motors umfasst und dass die Welle (12b) an ihrem Ende einen kegelförmigen Kopf (12a) für die tragende Aufnahme des Axialverdichters (11) aufweist, wobei die Verbindung des Axialverdichters (11) auf dem besagten konischen Teil in zweckmäßiger Weise ausgebildet ist.
  4. Klimagerät nach Anspruch 3, dadurch gekennzeichnet, dass die zweite Einrichtung (13) ein axialer Diffusor-Stator ist, der mit dem Mantel (10) fest verbunden ist, wobei die zweite Einrichtung (13) sich am Wellenteil (12c) zwischen dem Befestigungsflansch (12e) und dem konischen Teil (12a) befindet, und dass sie Flügel (13a) umfasst, die in der Verlängerung der Kompressorflügel (11a) angeordnet sind, wobei die Flügel (13a) aber im Gegensatz zu jenen, die als Luftschraube konfiguriert sind, in der axialen Längsrichtung des axialen Diffusor-Stators angeordnet sind.
  5. Klimagerät nach Anspruch 4, dadurch gekennzeichnet, dass die Flügel (13a) eine symmetrische Konfiguration haben mit einem progressiven Eintritt (13a1) und einem zweiten degressiven Teil (13a2), so dass ein Wassertropfenprofil gebildet wird, und dass die Lage von zwei aufeinander folgenden Flügeln einen Eintritt aus konvergierenden, dann am Austritt aus divergierenden Profilen mit einem verengten Zwischenbereich mit einem Hals (13a3) beschreibt.
  6. Klimagerät nach Anspruch 5, dadurch gekennzeichnet, dass der axiale Gleichrichter-Stator mit einer Beruhigungskammer in Zu- und Abstrom ausgebildet ist, die die Aufgabe hat, einen statischen Druck aufzubauen, der höher ist als der atmosphärische Druck.
  7. Klimagerät nach Anspruch 2, dadurch gekennzeichnet, dass die dritte Einrichtung (14) aus einem statischen Radialverdichter besteht, der einen rohrartigen Körper (14a) besitzt, der sich um den Motorblock (12) herum anpasst und nach einem besonderen Merkmal zwei Reihen von Primärflügeln (14b) und Sekundärflügeln (14c) mit unterschiedlichen Eigenheiten aufnimmt.
  8. Klimagerät nach Anspruch 7, dadurch gekennzeichnet, dass die dritte Einrichtung eine erste Flügelreihe (14b) mit fünf Flügeln umfasst, die schraubenartig mit variabler Geometrie und Steigung angeordnet sind, wobei diese ersten Flügel (14b) so ausgelegt sind, dass sie den aufnehmenden Körper (14a) ganz umrunden, und dass die besagten Flügel anfänglich in einem vorgegebenen Abstand zueinander parallel sind, um die Positionierung der anderen Reihe aus Sekundärflügeln (14c) zu ermöglichen, die eine deutlich geringere Amplitude aufweisen, und dass die besagten Sekundärflügel eine dem Anfangsprofil der Primärflügel (14b) entsprechende verdrehte Form haben, wobei die besagten Flügel (14c) weniger lang sind.
  9. Klimagerät nach Anspruch 8, dadurch gekennzeichnet, dass die Eintrittsteile der Flügel (14b-14c) alle in der Längsaxialrichtung des Körpers verlaufen, während sich die Enden am hinteren Austritt der Primärflügel auf einer radialen Ebene befinden, und dass die Oberfläche beiderseits der Flügel konkav ist.
  10. Klimagerät nach Anspruch 2, dadurch gekennzeichnet, dass die vierte Einrichtung (15) aus einem axialen Diffusor-Gleichrichter besteht, der sich in axialer Verlängerung der Einrichtung (14) befindet, und dass er aus einem hohlen zylindrischen Körper (15a) besteht, der geeignet ist, den Motorblock (12c) zu umgeben und dabei Raumluft zirkulieren zu lassen, und dass der axiale Diffusor-Gleichrichter mehrere Flügel (15b) aufweist, die in einer kurvenförmiges Konfiguration angeordnet sind.
  11. Klimagerät nach Anspruch 10, dadurch gekennzeichnet, dass die Flügel am Eintrittsbereich geringer beabstandet sind als an ihrem hinteren Ende, wodurch ein divergierender Effekt entsteht, und dass die Flügel am hinteren Ende axial zur Längsachse des Gleichrichters ausgerichtet sind, und dass der Eintrittsbereich der von der Einrichtung (14) kommenden Luft so ausgebildet ist, um sich in der Verlängerung des von der Einrichtung (14) kommenden Luftaustritts zu befinden.
  12. Klimagerät nach einem der Ansprüche 10 und 11, dadurch gekennzeichnet, dass der axiale Diffusor-Gleichrichter zum Zusammenwirken geeignet ist und das Positionieren und Aufstecken einer fünften Einrichtung (16) ermöglicht, die aus einem Transferventil besteht, und dass diese Einrichtung (16) einen zylindrischen Körper (16a), der in den Körper (15a) des Gleichrichters (15) gesteckt wird, und einen vorstehenden Bund (16b) mit zylindrischer Form aufweist, und dass der Bund in Kranzform mit mehreren Schlitzen (16c) ausgebildet ist, die eine Passage und den Umlauf von Luft im Körper (16a) ermöglichen, und dass am Kranz (16b) ein Ring (20) mit komplementärer Form angesetzt und positioniert ist, der im Winkel zu dem besagten Kranz (16b) geschwenkt werden kann, und dass der Ring selbst vollwandige Teile (20a) als Abdeckung aufweist, die komplementäre Formen und Abmessungen zu den Schlitzen (16c) haben, um sie je nach Position des Rings am Kranz (16b) ganz oder teilweise zu verschließen, und dass eine Einrichtung (21) für die Regulierung und Mitführung des Rings am Kranz so am Körper des Gleichrichters (15) angeordnet ist, um die zweckmäßige Winkelausrichtung des Transferventils zu ermöglichen.
  13. Klimagerät nach Anspruch 2, dadurch gekennzeichnet, dass die sechste Einrichtung (17) aus einem Wirbel mit einer zylindrischen Scheibe (17a) besteht, die in ihrem mittleren Teil hohl ist und mehrere Flügel (17b) aufnimmt, und dass die Flügel sternförmig mit einer kegelstumpfartigen Konfiguration angeordnet sind, und dass der Wirbel die Aufgabe hat, dem Luftstrom durch eine Rotationsbewegung zwischen den Flügeln eine stabile und konstante Geschwindigkeit zu geben und den Transfer des produzierten Luftstroms in die nachgeordnete Expansionskammer (18) vorzubereiten.
EP08761940A 2007-01-16 2008-01-15 Mit einem kompressor und einer wirbelvorrichtung ausgestattete klimaanlage Not-in-force EP2122178B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0752698A FR2911386B1 (fr) 2007-01-16 2007-01-16 Appareil de conditionnement d'air muni d'un compresseur et d'un vortex
PCT/FR2008/050069 WO2008099119A1 (fr) 2007-01-16 2008-01-15 Appareil de conditionnement d'air muni d'un compresseur et d'un vortex

Publications (2)

Publication Number Publication Date
EP2122178A1 EP2122178A1 (de) 2009-11-25
EP2122178B1 true EP2122178B1 (de) 2011-11-16

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US (1) US20100172750A1 (de)
EP (1) EP2122178B1 (de)
JP (1) JP2010515862A (de)
AT (1) ATE533945T1 (de)
FR (1) FR2911386B1 (de)
WO (1) WO2008099119A1 (de)

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CN113566410B (zh) * 2021-07-26 2024-12-03 珠海格力电器股份有限公司 一种扫风叶片、空调器及其控制方法
KR102773921B1 (ko) * 2022-03-08 2025-02-27 이동규 람젯 기류발생기
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CH687637A5 (de) * 1993-11-04 1997-01-15 Micronel Ag Axialkleinventilator.
DE19525699A1 (de) * 1995-07-14 1997-01-16 Bmw Rolls Royce Gmbh Tandem-Schaufelgitter
FR2808568B1 (fr) * 2000-05-05 2002-08-02 Valeo Thermique Moteur Sa Ventilateur pour vehicule automobile muni d'aubes directrices
AU2003278524A1 (en) * 2003-10-24 2005-05-11 Honeywell International Inc Sector-divided turbine assembly with axial piston variable-geometry mechanism
US7195456B2 (en) * 2004-12-21 2007-03-27 United Technologies Corporation Turbine engine guide vane and arrays thereof

Also Published As

Publication number Publication date
FR2911386A1 (fr) 2008-07-18
JP2010515862A (ja) 2010-05-13
FR2911386B1 (fr) 2009-03-06
WO2008099119A1 (fr) 2008-08-21
EP2122178A1 (de) 2009-11-25
ATE533945T1 (de) 2011-12-15
US20100172750A1 (en) 2010-07-08

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