EP0823555B1 - Kreiselventilationsgerät mit verbesserter Leistung mit wenigstens zwei Saugöffnungen und Ventilationsverfahren - Google Patents

Kreiselventilationsgerät mit verbesserter Leistung mit wenigstens zwei Saugöffnungen und Ventilationsverfahren Download PDF

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Publication number
EP0823555B1
EP0823555B1 EP97420141A EP97420141A EP0823555B1 EP 0823555 B1 EP0823555 B1 EP 0823555B1 EP 97420141 A EP97420141 A EP 97420141A EP 97420141 A EP97420141 A EP 97420141A EP 0823555 B1 EP0823555 B1 EP 0823555B1
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EP
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Prior art keywords
regulation
fineness
inlet
ventilation
partial
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EP97420141A
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English (en)
French (fr)
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EP0823555A1 (de
Inventor
Alain Francois Emile Godichon
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Howden Solyvent Ventec SAS
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ABB Solyvent Ventec SAS
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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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4226—Fan casings
    • F04D29/424—Double entry casings
    • 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
    • F04D17/08—Centrifugal pumps
    • F04D17/16—Centrifugal pumps for displacing without appreciable compression
    • F04D17/162—Double suction pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/003—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by throttling

Definitions

  • the present invention relates to the general technical field of centrifugal type ventilation devices and methods comprising at least two suction inlets for the fluid to be ventilated, arranged laterally opposite of the ventilation wheel.
  • the present invention relates to a centrifugal ventilation device, comprising at least one discharge section, and at least two inlet fluid arranged on either side of a ventilation wheel, capable of being driven in rotation by a drive means, each input being associated with a fluid regulation system, capable of creating a flow asymmetric suction between the inputs.
  • the present invention also relates to a ventilation method centrifugal of a fluid, in which, continuously and successively, sucks the fluid to be ventilated by a centrifugal wheel, through at least two inputs, located on either side of the wheel, to create at least one flow suction, the flow rate of the suction flow is regulated asymmetrically between the inputs, using regulation systems associated with each input, and the suction flow is expelled by the centrifugal wheel, through a discharge outlet.
  • type ventilation units centrifugal In these industrial applications, there are classically two main types of ventilation unit, i.e. type ventilation units centrifugal, and axial type ventilation units, it being understood that the present invention relates more particularly to fans of the type centrifugal, in which the fluid to be ventilated is sucked laterally, relative to the ventilation wheel, by at least two inputs, to be then expelled by the centrifugal force created by the vanes of the impeller ventilation.
  • tilters are formed by a series of blades rotatably mounted around an axis and arranged on a circle, for example coaxial with the ventilation wheel, at the level of the suction inlets arranged on either side of the wheel.
  • the registers are also formed by a series of blades mounted in a cover, with possibility of rotation and angular orientation around axes parallel.
  • the deflector elements are functionally connected to at least one means of control of their position and angular orientation, and by conventional means drive, such as a servo motor. It is thus possible to position the deflector elements associated with an inlet to vary the flow suction.
  • This curve shows, according to the angular position of the deflector elements and the operating intensity of the fan, expressed as a percentage, as a function of the maximum flow rate authorized by the installation, the evolution of the yield as a function of the flow over a given installation, the resistance of this system varying proportionally squared this flow.
  • step ventilation units To improve the efficiency of step ventilation units partial, it has already been proposed by DE-A-25 38 066, in the case of centrifugal fans fitted with tilt control systems, asynchronously or asymmetrically control the orientation of the tilts from one entry relative to the other. This asymmetry of functioning in the suction flow allows a significant improvement the performance of the partial operation ventilation unit. However, it appears that the economic optimum operating of these devices is obtained for high partial steps.
  • the object of the present invention therefore aims to improve the ventilation devices and methods mentioned above, and to be proposed a centrifugal ventilation method and device, the efficiency of which is maximum at all stages of partial operation, and the cost of achievement and operation is at its lowest.
  • Another object of the invention is to propose a new device and centrifugal ventilation process, in which the performance improvements are obtained using particularly simple technical means in action.
  • a complementary object of the invention aims to propose a new centrifugal ventilation device and method, particularly simple to adapt from the structure of most existing centrifugal fans, without change the general operating constraints.
  • Another object of the invention is to propose a new device and centrifugal ventilation process, in which the pressure drops are limited.
  • the objects assigned to the invention are achieved using a device for partial operation centrifugal ventilation with at least one outlet delivery and at least two fluid inlets arranged on either side a ventilation wheel capable of being rotated by a means each input being associated with a system for regulating the fluid suction flow capable of creating an asymmetrical suction flow between the inputs for ensuring partial operation of said device, characterized in that that the inputs are equipped with non-identical control systems which differ from each other by their mechanical structures and characteristics relative finesse of regulation so as to master and model the shape of the regulation curve at all operating gaits partial.
  • FIGS 2, 3 and 5 show a general view of a ventilation unit centrifugal 1 at partial operation, comprising at least two fluid inlets 2,3 arranged on either side of a ventilation wheel 4, mounted and supported in rotation by an axis 5, itself capable of being rotated by through a drive means (not shown in the figures), such than an electric motor, for example.
  • a drive means such than an electric motor, for example.
  • the centrifugal ventilation unit 1 can be unique, or on the contrary integrated in a ventilation device comprising several units of centrifugal ventilation.
  • fluid any gas or any gaseous mixture charged or not with particles of all kinds, solid or liquid for example, it being understood that, in the most common case, the fluid to be ventilated will have a composition little different from that of air.
  • the inputs 2, 3 are arranged laterally and symmetrically with respect to the main axis of symmetry x-x 'of the fan centrifugal 1, materialized by a central disc 10, of which the two lateral faces are provided with a series of blades 11, covered by flanges 12 of profiles variable, suitable for the type of centrifugal fan, the characteristics of the fluid to ventilate and its main use.
  • the flanges 12 can be conical or flat.
  • the assembly constituted by the central disc 10, the vanes 11 and the flanges 12, forms the ventilation wheel 4, integrated in a main frame 13, forming the general structure of the centrifugal fan 1.
  • Each series of blades 11 is associated with an input 2,3 and ensures, for each input, the individual fluid supply function to the downstream parts of the fan.
  • Associated supporting documents to the main frame are of classical design and well known to the man of art, and will therefore not be described in more detail.
  • the inputs 2, 3 are two in number, separate, and include an internal channel 14, forming the suction section of each inlet, said channel being delimited externally by a suction hood 17, covering each inlet 2, 3.
  • the main axis y-y 'of the cover suction 17 can be tilted upward relative to the horizontal.
  • the section and the dimensions of each entry 2, 3, and the 17 associated suction hoods are identical.
  • the centrifugal fan 1 also has at least one outlet for delivery 20, arranged downstream of the centrifugal wheel 4, considering the direction of fluid flow through the fan.
  • the discharge outlet 20 is central and arranged in the general axis of symmetry x-x 'of the centrifugal fan 1. In centrifugal fans, mixing the flows from each inlet 2,3 takes place in the envelope delimiting said outlet 20 just before expulsion of the resulting single flow.
  • the centrifugal fan 1, according to the invention, is also provided regulation systems 30 for the fluid suction flow through each input 2, 3.
  • the regulation systems 30 are formed by means conventional and known in the prior art, such as deflector elements of the direction and flow of the fluid through the inlets.
  • FIG. 2 shows a deflector element constituted by a series of blades 31, constituting a regulation system 30 with incliners.
  • Other regulation systems 30 are obviously conceivable, such than register or shutter systems, as will be shown more in detail in the description which follows.
  • the regulation 30 associated with each input 2, 3 are connected to a system of 20 'control of the partial operation of the fan shown in Figure 2.
  • Said system 20 comprises a drive member 21, such as a servomotor or a hydraulic cylinder, and an actuating means including by example a rod-crank assembly 22, indirectly connected to the blades 31, of so as to maintain or modify their angular position in space.
  • a drive member 21 such as a servomotor or a hydraulic cylinder
  • an actuating means including by example a rod-crank assembly 22, indirectly connected to the blades 31, of so as to maintain or modify their angular position in space.
  • the rod-crank assembly 22 it is possible to use any equivalent technical means, such as gears or cams.
  • the control system 20 ' is common at the two entrances 2, 3 and has an asymmetry in the organs of ordered.
  • the inputs 2, 3 are equipped with regulation 30, which differ from each other by their mechanical structures and by their relative characteristics of finesse of regulation.
  • the mounting of regulation systems 30 which are not identical and which therefore have performances different regulation, creates an asymmetrical suction flow between each entry 2, 3.
  • the finesse of regulation of a device is appreciated compared to another device, by the variation of the absorbed power necessary to operate the device, being it is understood that the comparison is made for the same pace of operation ie for the same flow.
  • the regulation systems 30 differ from each other by a finesse difference of regulation at least equal to 5%, and preferably between 5 and 20%.
  • a centrifugal ventilation device 1 will include therefore, non-identical control systems 30 ensuring comparatively a finer regulation finesse for one of its inputs 2, compared to the other input 3.
  • FIGS 3 and 4 show a first alternative embodiment of the invention, in which the inlet 3 is provided with a movable flap 40 of closing regulation while input 2 is equipped with a regulation register 35.
  • the deflector elements of the regulation register 35 are formed by a series of fins 35a, mounted in a chamber suction 16, located upstream of the suction channel 14 of the inlet 2, and preferably forming the upper inlet portion of the suction hood 17.
  • the fins 35a advantageously of substantially rectangular shape are mounted side by side in the suction chamber 16 along the axis longitudinal of the entry section of said chamber 16.
  • the fins 35a are arranged parallel to each other and extend advantageously over the entire suction section, so that completely block said suction section.
  • the fins 35a can occupy any angular intermediate position between 0 ° and 90 °, the angular position corresponding to 90 °, defining the open position of the register 35.
  • the movable shutter 40 for regulation-closing is presented under the shape of a substantially rectangular plate mounted, by one of its ends, in rotation on an axis 41 integral with the cover 17.
  • the movable flap 40 can occupy, relative to the opening defining entry 2, any position angular intermediary between a closed position and an angular position open, whose geometric position matches are similar to those given previously.
  • the movable flap 40 is more particularly intended to operate discontinuously between a closed and open position, the intermediate positions being practically unused.
  • FIG. 3 illustrates a position of the movable flap 40 in closed position, or substantially closed
  • Figure 5 illustrates a position of the movable flap 40 in the open position.
  • Figure 6 shows more in detail the range of different positioning possibilities of the movable flap 40 mounted in a suction hood 17a, similar to the suction hood 17 of the suction register 35.
  • the regulation system 30 constituted by the regulation register 35 forms the regulation system which has the best regulation finesse, compared to the movable flap 40.
  • the centrifugal ventilation device 1, according to the invention can be fitted of a combination of two other regulation systems 30.
  • This variant differs from the variant described above only by the replacement of ventilation damper 35 with a tilt system regulation 60, the other regulation system 30 being formed by a movable flap 40.
  • the regulating tilting device 60 presents itself, as is well known in trapezoidal, of constant thickness or not, mounted individually movable around an axis of rotation 62.
  • the blades 61 are arranged side by side, of preferably at equal distance from each other, in the suction channel 14, and mounted in a circle concentric with the ventilation wheel 4.
  • the blades 61 occupy an inclined position around their axis of rotation 62, relative to the extension plane of the central disc 10.
  • Each blade 61 being connected to the rod-crank assembly 22 and to the command 21, it is thus possible to modify the positioning and the orientation angular of each blade 61, and this in a synchronous manner, for the whole series of blades 61 associated with the corresponding input 2.
  • the dimensions and shapes of each series of blades 61 are such that in the so-called closed position, corresponding to an angular position defining an angulation equal to 0 °; the peripheral crown which they form between them substantially closes the suction channel 14 completely, the admitted fluid then being almost no.
  • the blades 61 can occupy any discrete angular position included for example between 0 and 105 °, and preferably between 0 ° and 90 °, being understood that from the zero angular position defined above, the direction movement and opening of the blades 61 must ensure a gyration of the flow of fluid in the direction of rotation of the centrifugal wheel 4.
  • a position angular blades 61 defined as being between 90 ° and 105 °, the flow rate of the suction flow will be maximum, since corresponding substantially to the thickness and at the average cross section near the blades 61, at all channel suction section 14.
  • the tilting system of regulation 60 is the regulation system with the best finesse regulation, while the movable flap system 40 constitutes the regulation with the most basic finesse of regulation.
  • the system movable flap 40 nevertheless constitutes a system with low pressure drop, full opening, compared to the tilting regulation system 60.
  • FIG. 7 illustrates a third alternative embodiment, in accordance with the invention, of general design identical to the previous variants, the regulation system 30 associated with an input 2 being formed by an incliner regulation 60, the other regulation system 30 associated with input 3 being a regulation register 35.
  • the regulation system inclinator 60 is the system with the best finesse of regulation, the regulation register system 35 being the system presenting the finesse of most basic regulation.
  • FIG. 7 also illustrates an additional alternative embodiment of the invention, which differs from all the previous variants only in that presence, outside the main frame 13 of the ventilation device centrifugal 1, of a suction sheath 50 disposed upstream of the covers suction 17.
  • the suction sheath 50 comprises an inlet duct 51, dividing into two secondary ducts 52, 53, respectively connected to inputs 2 and 3 via covers according to this variant embodiment, it is possible to have indifferently recourse to any combination of regulation 30 described above.
  • the section of each secondary conduits 52, 53 is equal so as to divide the flow suction at this level in two substantially equal suction flows.
  • the regulation systems 30 equipping each input 2, 3 can be same type, for example two regulating incliners 60 or two registers of regulation 35 as soon as they differ from each other by their structures mechanical.
  • mechanical differences carry advantageously on the geometry of the systems and include variations, cumulative or not, of dimensions, numbers, or shapes of the blades.
  • the method according to the invention consists in regulating the flow rate suction in each inlet 2, 3, using regulation systems 30 associated with each input, ensuring a relative finesse of regulation, which is different between each entry 2, 3.
  • Curve c shows the evolution of the yields obtained with a conventional system and method of the prior art, implementing a fan equipped for each of its inputs with regulation systems identical to tilters, the curve c here representing the device having the better regulation finesse.
  • Curves a and b show the results and yield gains obtained using a device and method in accordance with the invention. Curves a and b are almost identical for gaits operating at partial operation in the range 10-80% of flow total, while for convenience of presentation they appear slightly offset in Figure 1.
  • An indication of the angular setting of the blades 35a, or 61, fins or movable flaps 40 is indicated for each of these curves by a couple of numbers expressed in degrees, the first number (located the most left) being relative to the angular opening of the regulation system called “summary”, the second number (located on the far right) relating to the angular opening of the regulation system 30 having the best fine regulation.
  • the method according to the invention consists, according to a first variant of realization, to be closed progressively during step a), the system of regulation 30 presenting the most basic finesse of regulation, then, at during step b) gradually closing the other regulatory system.
  • This first variant is expressed by the graph of the curve b illustrating the performance evolution, in the case of a device equipped with a ventilation damper 35 and a tilt control system 60.
  • the regulation register 35 is used primarily to ensure partial operation of the fan between 80% and 100% of its total flow, the opening of the blades 35a varying gradually from their full opening to their total closure.
  • the losses of yield observed against curve c are low, and largely compensated by the gains obtained at the lower operating ranges, during which only the blades 61 are used to ensure the flow regulation.
  • the method consists, during the step a), to be closed progressively, for running gaits partial high (from 100% to 80% of the total flow), the regulation system 30 exhibiting the best finesse of regulation, then starting step b) with the simultaneous control of the total opening of the regulation system with the best finesse of regulation, while completely closing and quickly the regulation system previously opened and presenting the most basic finesse of regulation.
  • Step b) continues, ensuring the regulation by the regulation system 30 having the best finesse of regulation.
  • These operations are performed while maintaining the fan flow at a substantially constant level (around 80%), before continuing regulation for partial steps of less than 80%, using the system with the best regulation finesse.
  • Implementation of this second variant embodiment is preferably carried out by the combination of a tilting regulation system 60 with a damper regulation, of the movable flap type 40, capable of taking only a closed or open position.
  • the yields obtained according to the invention are significantly superior to prior art regulatory techniques (curve c) for partial fan steps of less than 80%, the yield gains obtained according to curve a (partial step of 80% at 100% of total flow) at high operating speeds, being substantially identical to curve c of the prior art and greater than curve b.
  • the device and method according to the invention allows to benefit from a maximum output for all gaits of partial fan operation. It is indeed possible by the judicious choice of associated regulation systems on the same installation to master and model the shape of the regulation curve for best meet the requirements of the installation using the ventilation.
  • the device and method according to the invention also makes it possible to improve the overall efficiency at full opening of flow control systems, since it implements at least one regulation system, such as a register regulator 35 with blades or a movable flap 40, introducing a loss of load at full opening, significantly lower than the pressure drop capable of being generated by a tilting regulation system 60.
  • the invention also makes it possible to reduce the overall cost of all of the regulatory systems, without reducing its efficiency, but at contrary by increasing it since, even at operating speeds high, the yields obtained are comparable to the best systems currently known.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Control Of Positive-Displacement Air Blowers (AREA)
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Claims (16)

  1. Kreiselventilationsgerät (1) für Teillast mit mindestens einem Auslaß (20) und mindestens zwei Fluideingängen (2, 3), die jeweils gegenüber liegend an einem Belüftungsrad (4) angeordnet sind, das über ein Förderelement in Drehung versetzt wird, wobei jedem Eingang (2, 3) ein Regelsystem (30) für die Ansaugströmung des Fluids zugeordnet ist, das geeignet ist eine zwischen den Eingängen (2, 3) asymmetrische Ansaugmenge zu erzeugen, um eine Teillast des Geräts zu gewährleisten, dadurch gekennzeichnet, dass die Eingänge (2, 3) mit nicht identischen Regelsystemen (30) ausgestattet sind, die sich untereinander durch ihre mechanischen Strukturen unterscheiden und durch ihre Eigenschaften hinsichtlich der Feinheit der Regelung, so dass die Form der Regelungskurve bei allen Teillast-Betriebsformen beherrschbar und darstellbar ist.
  2. Gerät gemäß Anspruch 1, dadurch gekennzeichnet, dass das einem Eingang (2, 3) zugeordnete Regelsystem (30) ein Regelsystem aufweist mit einer guten Feinheit der Regelung, und dem anderen Eingang (2, 3) ein Regelsystem (30) minderer Qualität zugeordnet ist, das eine Grundfeinheit der Regelung ergibt, wobei die Systeme untereinander sich durch eine Regelfeinheit von mindestens gleich 5% und von vorzugsweise zwischen 5% und 20% unterscheiden.
  3. Gerät gemäß Anspruch 2, dadurch gekennzeichnet, dass das Grundregelsystem (30) ein System ist mit geringem Ladeverlust bei voller Öffnung verglichen mit dem anderen Regelsystem (30).
  4. Gerät gemäß Anspruch 1, dadurch gekennzeichnet, dass das einem Eingang zugeordnete Regelsystem (30) gebildet ist aus einer Regelklappe (60) und das andere System eine Regelschließklappe (35) ist.
  5. Gerät gemäß einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das einem Eingang (2, 3) zugeordnete Regelsystem (30) gebildet ist aus einer Regelklappe (60) und der andere Eingang versehen ist mit einer beweglichen Schließ-Stellklappe (40) oder einer Regelschließklappe (35) mit einem einzigen Blatt (35a).
  6. Gerät gemäß einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass das einem Eingang (2, 3) zugeordnete Regelsystem (30) gebildet ist aus einer Regelschließklappe (35) und der andere Eingang (2, 3) versehen ist mit einer beweglichen Schließ-Stellklappe (40).
  7. Gerät gemäß einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass ein Ansaugkanal (50) vorgesehen ist, der sich in zwei Sekundärleitungen (52, 53) teilt, die jeweils mit den Eingängen (2, 3) verbunden sind.
  8. Gerät gemäß Anspruch 7, dadurch gekennzeichnet, dass mindestens eines der Regelsysteme (30) in dem Ansaugkanal (50) montiert ist.
  9. Gerät gemäß einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass zwei Fluideingänge (2, 3) vorgesehen sind.
  10. Gewerblicher Ventilator, der mit einem Gerät gemäß einem der Ansprüche 1 bis 9 ausgestattet ist.
  11. Verfahren zur Kreiselventilation eines Fluids mit Hilfe eines Ventilationsgeräts für Teillast, in dem auf kontinuierliche und aufeinander folgende Weise:
    Ansaugen des zu ventilierenden Fluids mittels eines Zentrifugenrads über wenigstens zwei Eingänge, die gegenüber liegend an dem Rad angeordnet sind, um wenigstens eine Ansaugströmung zu erzeugen,
    Regeln der Ansaugmenge auf asymmetrische Weise zwischen den Eingängen mittels der Regelsysteme, die jedem Eingang zugeordnet sind, um eine Teillast des Ventilationsgeräts zu gewährleisten.
    Gewährleisten des Ausschubs der Ansaugströmung mittels des Zentrifugenrads über einen Auslass, gekennzeichnet durch
    Regulieren der Menge der Ansaugströmung mittels des Regelsystems, wobei eine zu jedem Eingang unterschiedliche Feinheit der Regelung gewährleistet ist so dass die Form der Regelungskurve bei allen Teillast-Betriebsformen beherrschbar und darstellbar ist.
  12. Verfahren gemäß Anspruch 11, dadurch gekennzeichnet, dass die Regelsystem sich untereinander durch eine Regelfeinheit von mindestens gleich 5% und von vorzugsweise zwischen 5% und 20% unterscheiden.
  13. Verfahren gemäß Anspruch 11 oder 12, dadurch gekennzeichnet, dass die folgenden Schritte a) und b) vorgesehen sind:
    a) in einem Bereich der Teillast des Ventilationsgeräts zwischen 100% und 80% der insgesamt angesaugten Menge Gewährleisten der Regelung mittels eines einzelnen Regelsystems, das so ausgelegt ist, daß es jeweils von seiner offenen Position zu seiner geschlossenen Position gelangt., wobei das andere System ständig in einer festen offenen Position gehalten wird,
    b) dann in einem Bereich der Teillast unter 80% der gesamten Menge Gewährleisten der Regelung mindestens mittels des während des Schritts a) in fester offener Position gehaltenen Systems, indem es fortschreitend geschlossen wird bis zu dem der gewünschten Menge entsprechenden Wert.
  14. Verfahren gemäß Anspruch 13, gekennzeichnet durch,
    zunehmendes Schließen des die Feinheit der gröbsten Regelung darstellenden Regelsystems während des Schritts a),
    dann zunehmendes Schließen des anderen Regelsystems während des Schritts b).
  15. Verfahren gemäß Anspruch 13, gekennzeichnet durch,
    zunehmendes Schließen des die feinste Regelung darstellenden Regelsystems während des Schritts a),
    dann Einleiten des Schritts b) durch den gleichzeitigen Befehl der vollständigen Öffnung des die feinste Regelung darstellenden Regelsystems, wobei das die Feinheit der gröbsten Regelung darstellende Regelsystem vollständig geschlossen wird,
    Fortsetzen des Schritts b) durch gewährleisten der Regelung mit dem die feinste Regelung darstellenden Regelsystem.
  16. Verfahren gemäß Anspruch 15, gekennzeichnet durch Verwenden einer ausschließlich eine geschlossene oder eine offene Position einnehmenden Klappe für das die gröbste Regelung darstellende Regelsystem.
EP97420141A 1996-08-07 1997-08-06 Kreiselventilationsgerät mit verbesserter Leistung mit wenigstens zwei Saugöffnungen und Ventilationsverfahren Expired - Lifetime EP0823555B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9610135A FR2752271B1 (fr) 1996-08-07 1996-08-07 Dispositif de ventilation centrifuge a performances ameliorees comportant au moins deux entrees d'aspiration et procede de ventilation s'y rapportant
FR9610135 1996-08-07

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EP0823555A1 EP0823555A1 (de) 1998-02-11
EP0823555B1 true EP0823555B1 (de) 2003-04-02

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US (1) US5980199A (de)
EP (1) EP0823555B1 (de)
JP (1) JP2000515604A (de)
CN (1) CN1270099C (de)
AT (1) ATE236356T1 (de)
AU (1) AU724577B2 (de)
BR (1) BR9711172A (de)
DE (1) DE69720340T2 (de)
DK (1) DK0823555T3 (de)
ES (1) ES2196283T3 (de)
FR (1) FR2752271B1 (de)
ID (1) ID17983A (de)
TW (1) TW490536B (de)
WO (1) WO1998005867A1 (de)
ZA (1) ZA977001B (de)

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JP3930170B2 (ja) * 1998-02-18 2007-06-13 株式会社荏原製作所 循環ファン装置
US6942448B1 (en) * 2003-09-26 2005-09-13 Fast Flow Llc Pump
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Publication number Publication date
US5980199A (en) 1999-11-09
FR2752271A1 (fr) 1998-02-13
FR2752271B1 (fr) 1998-10-09
BR9711172A (pt) 2000-01-11
AU3945797A (en) 1998-02-25
DE69720340T2 (de) 2005-04-07
ATE236356T1 (de) 2003-04-15
TW490536B (en) 2002-06-11
ZA977001B (en) 1998-03-03
WO1998005867A1 (fr) 1998-02-12
DE69720340D1 (de) 2003-05-08
ID17983A (id) 1998-02-12
CN1188857A (zh) 1998-07-29
EP0823555A1 (de) 1998-02-11
DK0823555T3 (da) 2003-07-21
CN1270099C (zh) 2006-08-16
ES2196283T3 (es) 2003-12-16
AU724577B2 (en) 2000-09-28
JP2000515604A (ja) 2000-11-21

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