EP1188930B2 - Fan device, in particular radial fan device - Google Patents

Fan device, in particular radial fan device Download PDF

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Publication number
EP1188930B2
EP1188930B2 EP00119951A EP00119951A EP1188930B2 EP 1188930 B2 EP1188930 B2 EP 1188930B2 EP 00119951 A EP00119951 A EP 00119951A EP 00119951 A EP00119951 A EP 00119951A EP 1188930 B2 EP1188930 B2 EP 1188930B2
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EP
European Patent Office
Prior art keywords
outlet
air
housing
fan
air passage
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.)
Expired - Lifetime
Application number
EP00119951A
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German (de)
French (fr)
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EP1188930A1 (en
EP1188930B1 (en
Inventor
Ernst Claussen
Joachim Peetz
Gerd Wegner
Yingan Dr. Xia
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Punker GmbH
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Punker GmbH
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Application filed by Punker GmbH filed Critical Punker GmbH
Priority to AT00119951T priority Critical patent/ATE263925T1/en
Priority to DE50006003T priority patent/DE50006003D1/en
Priority to EP00119951A priority patent/EP1188930B2/en
Publication of EP1188930A1 publication Critical patent/EP1188930A1/en
Application granted granted Critical
Publication of EP1188930B1 publication Critical patent/EP1188930B1/en
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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
    • F04D29/4213—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps suction ports
    • 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
    • F04D27/009—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by bleeding, by passing or recycling fluid

Definitions

  • the invention relates to a blower arrangement, in particular a radial blower arrangement, with a blower housing containing a fan impeller, which has an air inlet and an air outlet.
  • blower arrangements designed as radial blowers are described, for example, in DE-U-298 20 767, DE-U-298 20 766, EP-A-10 02 957, EP-A-10 02 958, EP-A- 10 22 470 or EP-A-10 22 469 known.
  • blowers have a high capacity and are therefore particularly suitable as modern burner blower, which must have a large modulatable power range.
  • throttle control is used in most systems to regulate airflow, i.e., the airflow is throttled as necessary by means of a damper, invariably resulting in a flow disturbance and thus also associated with a deterioration of noise performance and blower fan efficiency.
  • a throttle control is e.g. known from DE 195 48 800 A1.
  • An object of the present invention is thus to regulate a fan with lower energy losses and quieter.
  • the bypass regulation according to the invention can be integrated with virtually no interference in the blower arrangement.
  • the blower arrangement has a high characteristic stability because the blower region which is responsible for the pressure build-up and which is sensitive, for example, as a blower housing designed as a spiral housing, remains virtually undisturbed by the bypass arrangement.
  • the adjustable opening allows easy and effective power control. In the entire performance range
  • the fan assembly works efficiently and quietly.
  • the air duct assembly can be easily combined with existing blowers, so that they need not be changed essentially constructive. Part of the high-energy flow is specifically supplied to the low-energy flow in the suction-side air duct in such a way that the energy and flow velocity of the suction-side flow increases. This inflow is loss and quiet.
  • the opening between the pressure-side and the suction-side air duct can be adjusted in an advantageous manner by an adjusting member, in particular an adjustable air flap.
  • the effect of the inflow can be further improved by the fact that the opening and / or the adjusting member is disposed on the radially outer side of a curved portion of the pressure-side air duct, since when opening the adjusting member or the air damper, the high-energy flow is automatically supplied by centrifugal effect of the low-energy flow becomes.
  • the desired flow direction can be supported.
  • the adjusting member can be connected to an adjusting the air or fan power or regulating actuator, so that the fan power or a burner power can be automatically controlled with appropriate use.
  • the air guide assembly includes a pressure side connected to the blower housing pressure chamber having an outlet-side exhaust opening, wherein the pressure chamber has a relation to the air outlet of the blower housing at least partially larger cross-section.
  • This pressure chamber advantageously causes a static pressure increase, which is particularly advantageous for use in heating burners.
  • the pressure chamber is designed as a blow-out diffuser with an air duct which widens in cross section in cross-section, in particular continuously expanding.
  • This air duct is suitably curved G-, U- or arcuately, so that a very compact diffuser can be achieved, which is particularly suitable for the burner insert.
  • a very compact and structurally favorable arrangement of the air duct arrangement can be achieved in that it is designed as a flat housing is, and the blower housing is attached to a flat side of the flat housing, wherein the air outlet of the blower housing opens at an access opening to the pressure-side air duct.
  • the two air ducts can be arranged side by side in a simple manner so that the high-energy partial flow can be optimally supplied to the low-energy suction-side air flow.
  • the suction-side air duct in the flat housing could expediently be arranged at an outlet opening, which is connected to the air inlet of the blower housing via a connecting channel or a connecting housing, this outlet opening preferably being arranged on the flat side of the flat housing having the access opening to the pressure-side air duct, so that the blower housing is in a simpler manner Way can be mounted on this flat side and the suction-side connection can be realized in a structurally simple manner by an attachable connection channel or a connection housing.
  • the discharge opening of the air guide arrangement is preferably attached to the flat side facing away from the fan housing of the formed as a flat housing air guide assembly and opens in the case of a burner application preferably on a mixing pipe connected to the air guide assembly.
  • the trained as a flat housing air duct assembly can serve at the same time as a closure lid of a boiler in an advantageous manner.
  • the blower arrangement shown as an exemplary embodiment in FIGS. 1 to 3 has a blower housing 11 possessing a radial blower 10, as shown for example in the above-mentioned prior art and described in different variants.
  • a cup-shaped impeller 12 is rotatably mounted and is driven by a drive motor 13 on the outside of the blower housing 11.
  • the blower housing 11 has a lateral axial air inlet 14 and a radial air outlet 15 at the end of the helically expanding blower housing 11.
  • the radial fan 10 is mounted on a flat side of a trained as a flat housing 16 air guide assembly 17 such that the air outlet 15 of the blower housing 11 opens at an access opening 18 to a pressure-side air channel 19 in the flat housing 16 and aligned with this.
  • This pressure-side air channel 19 in the interior of the flat housing 16 forms a pressure chamber or a blow-out diffuser and is curved in a G, U or arc-like manner.
  • the cross-section of this pressure-side air duct 19 widens substantially continuously from the access opening 18 up to an outlet-side blow-out opening 20, wherein sections with a constant or temporarily decreasing diameter are also possible.
  • the blow-out opening 20 is located on the side opposite to the access opening 18 side wall of the flat housing 16 and forms an access to a mixing tube 21 or burner tube attached there.
  • the diameter of the mixing tube 21 substantially corresponds to the largest diameter at the end region of the pressure-side air channel 19, while the exhaust opening 20 has a smaller diameter.
  • the diameter of the blow-out opening 20 may also correspond to the diameter of the mixing tube 21.
  • a mixing tube 21 is of course only in the case of application to a burner, such as heating burner required.
  • the entire flat housing 16 may be formed as a closure door or closure flap for the combustion chamber of a heating boiler.
  • the design of the pressure-side air duct 19 as a blow-out diffuser serves to increase the static fan pressure, wherein in a simpler embodiment, the pressure-side air duct 19 can also form a geometrically differently designed pressure chamber to increase the static pressure. It is essential for this that increases the cross-section of this pressure chamber relative to the air outlet 15.
  • a suction-side or suction-side connected to the blower housing 11 air duct 22 in the flat housing 16 has an inlet-side inflow 23_und opens at an outlet opening 24 which is arranged on the same flat side of the flat housing 16, as the access opening 18 to the pressure-side air duct 19.
  • This outlet opening 24 is located such that, in addition to the mounted fan housing 11, that the suction-side air passage 22 extends below the blower housing 11.
  • connection housing 25 To connect this outlet opening 24 with the air inlet 14 of the blower housing 11 is a connection housing 25, which with its flat side on the provided with the air inlet 14 side wall of the blower housing 11 abuts and covered with a narrow side of the outlet opening 24, so that the suction-side air flow through the suction-side air passage 22, the outlet opening 24, the connecting housing 25 and the air inlet 14 can flow into the fan housing 11 axially.
  • the suction-side air streams are shown for clarity as double arrows and the pressure-side air streams as bold arrows, this representation is problematic in Figure 2, since the two air channels 19, 22 are arranged one behind the other.
  • the two air ducts 19, 22 are arranged on the flat housing 16 in such a way that the end region of the pressure-side air duct 19 and the starting region of the suction-side air duct 22 run directly next to one another and are only separated by an intermediate wall 26.
  • the pressure-side air channel 19 has a curvature as a result of its G, U or arc-like shape.
  • the correspondingly curved intermediate wall 26 is formed at this point by a pivotable air damper 27, through which a bypass from the pressure-side air duct 19 to the suction-side air duct 22 can be formed with a variable cross-section.
  • the air damper 27 may be provided with an actuator, not shown, for example, a servomotor.
  • the air damper 27 is designed as a flow-guiding member in order to be able to supply the high-energy air flow to the air duct 22 with as little loss as possible.
  • another adjustment member for a connection opening between the two air channels 19, 22 occur, for example, a displaceable or pivotable aperture.
  • the invention is of course not limited to radial fans, but other types of fans can be used and connected to a corresponding air duct assembly 17. In principle, it is also possible to realize a combined fan and air duct housing.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Jet Pumps And Other Pumps (AREA)

Abstract

The fan housing (11) is connected to an air guide assembly (17) in which an air duct (19) connected on the pressure side to the fan casing and having an outlet opening (20) on the outlet side is connectable through an adjustable opening to an air duct (22) attached on the suction side to the fan casing and having an inlet opening (23) on the inlet side so that a part of the air stream on the pressure side can be supplied to the air stream on the suction side. The opening between the air ducts can be adjusted by an adjustable air flap.

Description

Die Erfindung betrifft eine Gebläseanordnung, insbesondere Radialgebläseanordnung, mit einem ein Gebläselaufrad enthaltenden Gebläsegehäuse, das einen Lufteinlass und einen Luftauslass besitzt.The invention relates to a blower arrangement, in particular a radial blower arrangement, with a blower housing containing a fan impeller, which has an air inlet and an air outlet.

Derartige, als Radialgebläse ausgebildete Gebläseanordnungen sind beispielsweise aus der DE-U-298 20 767, der DE-U-298 20 766, der EP-A-10 02 957, der EP-A-10 02 958, der EP-A-10 22 470 oder der EP-A-10 22 469 bekannt. Derartige Gebläse besitzen ein hohes Leistungsvermögen und eignen sich daher besonders als moderne Brennergebläse, die einen großen modulierbaren Leistungsbereich aufweisen müssen.Such blower arrangements designed as radial blowers are described, for example, in DE-U-298 20 767, DE-U-298 20 766, EP-A-10 02 957, EP-A-10 02 958, EP-A- 10 22 470 or EP-A-10 22 469 known. Such blowers have a high capacity and are therefore particularly suitable as modern burner blower, which must have a large modulatable power range.

Um die Luftleistung zu regulieren, verwendet man derzeit in den meisten Systemen eine Drosselregelung, d.h., der Luftstrom wird mittels eines Drosselglieds bei Bedarf gedrosselt, was ausnahmslos zu einer Strömungsstörung führt und somit auch mit einer Verschlechterung von Geräuschverhalten sowie Wirkungsgrad der Gebläseanordnung verbunden ist. Eine solche Drosselregelung ist z.B. aus der DE 195 48 800 A1 bekannt.Currently, throttle control is used in most systems to regulate airflow, i.e., the airflow is throttled as necessary by means of a damper, invariably resulting in a flow disturbance and thus also associated with a deterioration of noise performance and blower fan efficiency. Such a throttle control is e.g. known from DE 195 48 800 A1.

Aus der EP 0 588 072 A1 ist ein Gebläse mit einer schwenkbaren Klappe am Gebläseauslass bekannt, über die Umgebungsluft dem druckseitigen Luftstrom zugeführt werden kann. Diese Klappe ist im Gebläse selbst angeordnet und erfordert dadurch eine konstruktive Änderung am Gebläse. Darüber hinaus wird in nachteiliger Weise bei der Zufuhr von Umgebungsluft der druckseitige Luftstrom gedrosselt, was ebenfalls zu einer Verschlechterung von Geräuschverhalten und Wirkungsgrad führt.From EP 0 588 072 A1 a blower with a pivotable flap on the blower outlet is known, via which ambient air can be supplied to the pressure-side air flow. This flap is arranged in the blower itself and thereby requires a constructive change to the blower. In addition, the supply side air flow is adversely affected in the supply of ambient air, which also leads to a deterioration of noise performance and efficiency.

Bei einer aus der DE-A-38 39 430 bekannten Gebläseanordnung kann ein Teil des druckseitigen Luftstroms dem Innenraum des Gebläses wieder zugeführt werden. Dies erfolgt über mehrere strömungsungünstige, mehrfach umgelenkte Überströmkanäle. Durch diese mehrfache Umlenkung wird die Energie und die Strömungsgeschwindigkeit der saugseitigen Strömung in keiner Weise unterstützt, eher noch durch die ungünstigen Strömungsverhältnisse vermindert.At one of the DE-A-38 39 430 known blower arrangement, a part of the pressure-side air flow to the interior of the blower can be supplied again. This is done via several flow-unfavorable, repeatedly deflected overflow. Due to this multiple deflection, the energy and the flow velocity of the suction-side flow is in no way supported, rather reduced by the unfavorable flow conditions.

Eine Aufgabe der vorliegenden Erfindung besteht somit darin, ein Gebläse mit geringeren Energieverlusten und geräuscharmer zu regulieren.An object of the present invention is thus to regulate a fan with lower energy losses and quieter.

Diese Aufgabe wird erfindungsgemäß durch eine Gebläseanordnung mit den Merkmalen des Anspruchs 1 gelöst.This object is achieved by a blower arrangement with the features of claim 1.

Die Vorteile dieser Anordnung gegenüber der herkömmlichen Drosselregulierung der Gebläseleistung sind vielseitig. Zum einen kann die erfindungsgemäße Bypassregulierung nahezu störungsfrei in der Gebläseanordnung mit integriert werden. Die Gebläseanordnung verfügt insgesamt über eine hohe Kennlinienstabilität, weil der für den Druckaufbau verantwortliche und empfindliche Ausblasbereich des beispielsweise als Spiralgehäuse ausgebildeten Gebläsegehäuses nahezu ungestört durch die Bypassanordnung bleibt. Die einstellbare Öffnung ermöglicht eine einfache und effektive Leistungsregelung. Im gesamten Leistungsbereich arbeitet die Gebläseanordnung effizient und geräuscharm. Die Luftführungsanordnung lässt sich leicht mit vorhandenen Gebläsen kombinieren, so dass diese im Wesentlichen konstruktiv nicht verändert zu werden brauchen. Ein Teil der energiereichen Strömung wird gezielt der energiearmen Strömung im saugseitigen Luftkanal derart zugeführt, dass sich die Energie und Strömungsgeschwindigkeit der saugseitigen Strömung vergrößert. Dabei erfolgt diese Zuströmung verlust- und geräuscharm.The advantages of this arrangement over the conventional throttle regulation of the blower power are versatile. On the one hand, the bypass regulation according to the invention can be integrated with virtually no interference in the blower arrangement. Overall, the blower arrangement has a high characteristic stability because the blower region which is responsible for the pressure build-up and which is sensitive, for example, as a blower housing designed as a spiral housing, remains virtually undisturbed by the bypass arrangement. The adjustable opening allows easy and effective power control. In the entire performance range The fan assembly works efficiently and quietly. The air duct assembly can be easily combined with existing blowers, so that they need not be changed essentially constructive. Part of the high-energy flow is specifically supplied to the low-energy flow in the suction-side air duct in such a way that the energy and flow velocity of the suction-side flow increases. This inflow is loss and quiet.

Durch die in den Unteransprüchen aufgeführte Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen der im Anspruch 1 angegebenen Gebläseanordnung möglich.The measures listed in the dependent claims advantageous refinements and improvements of the claim 1 blower arrangement are possible.

Die Öffnung zwischen dem druckseitigen und dem saugseitigen Luftkanal ist in vorteilhafter Weise durch ein Einstellorgan, insbesondere eine einstellbare Luftklappe einstellbar. Die Wirkung der Zuströmung kann noch dadurch verbessert werden, dass die Öffnung und/oder das Einstellorgan an der radialen Außenseite eines gekrümmten Bereichs des druckseitigen Luftkanals angeordnet ist, da beim Öffnen des Einstellorgans bzw. der Luftklappe die energiereiche Strömung automatisch durch Zentrifugalwirkung der energiearmen Strömung zugeführt wird.The opening between the pressure-side and the suction-side air duct can be adjusted in an advantageous manner by an adjusting member, in particular an adjustable air flap. The effect of the inflow can be further improved by the fact that the opening and / or the adjusting member is disposed on the radially outer side of a curved portion of the pressure-side air duct, since when opening the adjusting member or the air damper, the high-energy flow is automatically supplied by centrifugal effect of the low-energy flow becomes.

Durch die Luftklappe kann dabei die gewünschte Strömungsrichtung unterstützt werden.Through the air damper, the desired flow direction can be supported.

Vorteilhafter Weise kann das Einstellorgan mit einem die Luft- oder Gebläseleistung einstellenden oder regelnden Stellglied verbunden sein, so dass die Gebläseleistung bzw. eine Brennerleistung bei entsprechendem Einsatz automatisch geregelt werden kann.Advantageously, the adjusting member can be connected to an adjusting the air or fan power or regulating actuator, so that the fan power or a burner power can be automatically controlled with appropriate use.

In einer weiteren vorteilhaften Ausgestaltung der Erfindung enthält die Luftführungsanordnung eine druckseitig am Gebläsegehäuse angeschlossene Druckkammer mit einer ausgangsseitigen Ausblasöffnung, wobei die Druckkammer einen gegenüber dem Luftauslass des Gebläsegehäuses wenigstens zum Teil größeren Querschnitt aufweist. Diese Druckkammer bewirkt in vorteilhafter Weise eine statische Druckerhöhung, die vor allem für den Einsatz bei Heizungsbrennern besonders vorteilhaft ist.In a further advantageous embodiment of the invention, the air guide assembly includes a pressure side connected to the blower housing pressure chamber having an outlet-side exhaust opening, wherein the pressure chamber has a relation to the air outlet of the blower housing at least partially larger cross-section. This pressure chamber advantageously causes a static pressure increase, which is particularly advantageous for use in heating burners.

Diese Erhöhung des statischen Drucks kann noch dadurch verbessert bzw. verstärkt werden, wenn die Druckkammer als Ausblas-Diffusor mit einem sich zur Ausblasöffnung hin im Querschnitt erweiternden, insbesondere kontinuierlich erweiternden Luftkanal ausgebildet ist. Dieser Luftkanal ist zweckmäßigerweise G-, U- oder bogenartig gekrümmt, so dass ein sehr kompakter Diffusor erzielt werden kann, der sich vor allem für den Brennereinsatz eignet.This increase in the static pressure can be further improved or enhanced if the pressure chamber is designed as a blow-out diffuser with an air duct which widens in cross section in cross-section, in particular continuously expanding. This air duct is suitably curved G-, U- or arcuately, so that a very compact diffuser can be achieved, which is particularly suitable for the burner insert.

Eine sehr kompakte und konstruktiv günstige Anordnung der Luftführungsanordnung kann dadurch erreicht werden, dass diese als Flachgehäuse ausgebildet ist, und das Gebläsegehäuse an einer Flachseite des Flachgehäuses angebracht ist, wobei der Luftauslass des Gebläsegehäuses an einer Zugangsöffnung zum druckseitigen Luftkanal mündet. In diesem Flachgehäuse können die beiden Luftkanäle in einfacher Weise so nebeneinander angeordnet werden, dass der energiereiche Teilstrom in optimaler Weise dem energiearmen saugseitigen Luftstrom zugeführt werden kann.A very compact and structurally favorable arrangement of the air duct arrangement can be achieved in that it is designed as a flat housing is, and the blower housing is attached to a flat side of the flat housing, wherein the air outlet of the blower housing opens at an access opening to the pressure-side air duct. In this flat housing, the two air ducts can be arranged side by side in a simple manner so that the high-energy partial flow can be optimally supplied to the low-energy suction-side air flow.

Der saugseitige Luftkanal im Flachgehäuse könnte zweckmäßigerweise an einer Austrittsöffnung, die über einen Verbindungskanal oder ein Verbindungsgehäuse mit dem Lufteinlass des Gebläsegehäuses verbunden ist, wobei diese Austrittsöffnung vorzugsweise an der die Zugangsöffnung zum druckseitigen Luftkanal aufweisenden Flachseite des Flachgehäuses angeordnet ist, so dass das Gebläsegehäuse in einfacher Weise an dieser Flachseite montiert werden kann und die saugseitige Verbindung in konstruktiv einfacher Weise durch einen anmontierbaren Verbindungskanal oder ein Verbindungsgehäuse realisiert werden kann.The suction-side air duct in the flat housing could expediently be arranged at an outlet opening, which is connected to the air inlet of the blower housing via a connecting channel or a connecting housing, this outlet opening preferably being arranged on the flat side of the flat housing having the access opening to the pressure-side air duct, so that the blower housing is in a simpler manner Way can be mounted on this flat side and the suction-side connection can be realized in a structurally simple manner by an attachable connection channel or a connection housing.

Die Ausblasöffnung der Luftführungsanordnung ist vorzugsweise an der vom Gebläsegehäuse wegweisenden Flachseite der als Flachgehäuse ausgebildeten Luftführungsanordnung angebracht und mündet im Falle einer Brenneranwendung vorzugsweise an einem an der Luftführungsanordnung angeschlossenen Mischrohr. Dabei kann die als Flachgehäuse ausgebildete Luftführungsanordnung in vorteilhafter Weise gleichzeitig als Verschlussdeckel eines Heizungskessels dienen.The discharge opening of the air guide arrangement is preferably attached to the flat side facing away from the fan housing of the formed as a flat housing air guide assembly and opens in the case of a burner application preferably on a mixing pipe connected to the air guide assembly. In this case, the trained as a flat housing air duct assembly can serve at the same time as a closure lid of a boiler in an advantageous manner.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen:

Figur 1
eine Draufsicht auf eine Flachseite der als Flachgehäuse ausgebildeten Luftführungsanordnung,
Figur 2
eine schematische Seitenansicht der gesamten Gebläseanordnung und
Figur 3
eine Seitenansicht des auf das Flachgehäuse aufgesetzten Gebläsegehäuses.
An embodiment of the invention is illustrated in the drawing and explained in more detail in the following description. Show it:
FIG. 1
a plan view of a flat side of the formed as a flat housing air guide assembly,
FIG. 2
a schematic side view of the entire fan assembly and
FIG. 3
a side view of the fan housing mounted on the flat housing.

Die in den Figuren 1 bis 3 als Ausführungsbeispiel dargestellte Gebläseanordnung weist ein ein Gebläsegehäuse 11 besitzendes Radialgebläse 10 auf, wie es beispielsweise in dem eingangs angegebenen Stand der Technik dargestellt und in verschiedenen Varianten beschrieben ist. Im Gebläsegehäuse 10 ist ein topfartiges Laufrad 12 drehbar gelagert und wird durch einen Antriebsmotor 13 an der Außenseite des Gebläsegehäuses 11 angetrieben. Das Gebläsegehäuse 11 besitzt einen seitlichen axialen Lufteinlass 14 und einen radialen Luftauslass 15 am Ende des sich schneckenartig erweiternden Gebläsegehäuses 11.The blower arrangement shown as an exemplary embodiment in FIGS. 1 to 3 has a blower housing 11 possessing a radial blower 10, as shown for example in the above-mentioned prior art and described in different variants. In the blower housing 10, a cup-shaped impeller 12 is rotatably mounted and is driven by a drive motor 13 on the outside of the blower housing 11. The blower housing 11 has a lateral axial air inlet 14 and a radial air outlet 15 at the end of the helically expanding blower housing 11.

Das Radialgebläse 10 ist an einer Flachseite einer als Flachgehäuse 16 ausgebildeten Luftführungsanordnung 17 derart montiert, dass der Luftauslass 15 des Gebläsegehäuses 11 an einer Zugangsöffnung 18 zu einem druckseitigen Luftkanal 19 im Flachgehäuse 16 mündet bzw. mit dieser fluchtet. Dieser druckseitige Luftkanal 19 im Inneren des Flachgehäuses 16 bildet eine Druckkammer bzw. einen Ausblas-Diffusor und ist G-, U- oder bogenartig gekrümmt. Der Querschnitt dieses druckseitigen Luftkanals 19 erweitert sich von der Zugangsöffnung 18 aus bis zu einer ausgangsseitigen Ausblasöffnung 20 hin im Wesentlichen stetig, wobei auch Abschnitte mit gleichbleibendem oder sich vorübergehend verringerndem Durchmesser möglich sind. Die Ausblasöffnung 20 befindet sich an der zur Zugangsöffnung 18 gegenüberliegenden Seitenwandung des Flachgehäuses 16 und bildet einen Zugang zu einem dort angesetzten Mischrohr 21 bzw. Brennerrohr.The radial fan 10 is mounted on a flat side of a trained as a flat housing 16 air guide assembly 17 such that the air outlet 15 of the blower housing 11 opens at an access opening 18 to a pressure-side air channel 19 in the flat housing 16 and aligned with this. This pressure-side air channel 19 in the interior of the flat housing 16 forms a pressure chamber or a blow-out diffuser and is curved in a G, U or arc-like manner. The cross-section of this pressure-side air duct 19 widens substantially continuously from the access opening 18 up to an outlet-side blow-out opening 20, wherein sections with a constant or temporarily decreasing diameter are also possible. The blow-out opening 20 is located on the side opposite to the access opening 18 side wall of the flat housing 16 and forms an access to a mixing tube 21 or burner tube attached there.

Der Durchmesser des Mischrohrs 21 entspricht im Wesentlichen dem größten Durchmesser am Endbereich des druckseitigen Luftkanals 19, während der Ausblasöffnung 20 einen geringeren Durchmesser besitzt. In einer alternativen Ausgestaltung kann der Durchmesser der Ausblasöffnung 20 auch dem Durchmesser des Mischrohrs 21 entsprechen. Weiterhin ist es möglich, im Übergangsbereich zwischen dem druckseitigen Luftkanal 19 und dem Mischrohr 21 oder im Mischrohr eine in Verbindung mit Mischrohren bekannte Drosseleinrichtung bzw. ein Mischelement vorzusehen, wie dies beispielsweise in der EP-A-990 844 beschrieben ist.The diameter of the mixing tube 21 substantially corresponds to the largest diameter at the end region of the pressure-side air channel 19, while the exhaust opening 20 has a smaller diameter. In an alternative embodiment, the diameter of the blow-out opening 20 may also correspond to the diameter of the mixing tube 21. Furthermore, it is possible to provide in the transition region between the pressure-side air duct 19 and the mixing tube 21 or in the mixing tube known in connection with mixing tubes throttle device or a mixing element, as described for example in EP-A-990 844.

Ein Mischrohr 21 ist selbstverständlich nur im Falle der Anwendung bei einem Brenner, beispielsweise Heizungsbrenner erforderlich. In diesem Falle kann auch das gesamte Flachgehäuse 16 als Verschlusstür oder Verschlussklappe für den Brennraum eines Heizungskessels ausgebildet sein.A mixing tube 21 is of course only in the case of application to a burner, such as heating burner required. In this case, the entire flat housing 16 may be formed as a closure door or closure flap for the combustion chamber of a heating boiler.

Die Ausbildung des druckseitigen Luftkanals 19 als Ausblas-Diffusor dient zur Erhöhung des statischen Gebläsedrucks, wobei in einer einfacheren Ausführung der druckseitige Luftkanal 19 auch eine geometrisch anders ausgestaltete Druckkammer bilden kann, um den statischen Druck zu erhöhen. Wesentlich ist hierfür, dass sich der Querschnitt dieser Druckkammer gegenüber dem des Luftauslasses 15 vergrößert.The design of the pressure-side air duct 19 as a blow-out diffuser serves to increase the static fan pressure, wherein in a simpler embodiment, the pressure-side air duct 19 can also form a geometrically differently designed pressure chamber to increase the static pressure. It is essential for this that increases the cross-section of this pressure chamber relative to the air outlet 15.

Ein saugseitiger bzw. saugseitig an das Gebläsegehäuse 11 angeschlossener Luftkanal 22 im Flachgehäuse 16 besitzt eine eingangsseitige Zuströmöffnung 23_und mündet an einer Austrittsöffnung 24, die an der selben Flachseite des Flachgehäuses 16 angeordnet ist, wie die Zugangsöffnung 18 zum druckseitigen Luftkanal 19. Diese Austrittsöffnung 24 befindet sich derart neben dem anmontierten Gebläsegehäuse 11, dass der saugseitige Luftkanal 22 sich unter dem Gebläsegehäuse 11 hindurch erstreckt. Zur Verbindung dieser Austrittsöffnung 24 mit dem Lufteinlass 14 des Gebläsegehäuses 11 dient ein Verbindungsgehäuse 25, das mit seiner Flachseite an der mit dem Lufteinlass 14 versehenen Seitenwandung des Gebläsegehäuses 11 anliegt und mit einer Schmalseite der Austrittsöffnung 24 überdeckt, so dass der saugseitige Luftstrom durch den saugseitigen Luftkanal 22, die Austrittsöffnung 24, das Verbindungsgehäuse 25 und den Lufteinlass 14 in das Gebläsegehäuse 11 axial einströmen kann. Die saugseitigen Luftströme sind zur Verdeutlichung als Doppelpfeile und die druckseitigen Luftströme als fette Pfeile dargestellt, wobei diese Darstellung in Figur 2 dadurch problematisch ist, da die beiden Luftkanäle 19, 22 hintereinander angeordnet sind.A suction-side or suction-side connected to the blower housing 11 air duct 22 in the flat housing 16 has an inlet-side inflow 23_und opens at an outlet opening 24 which is arranged on the same flat side of the flat housing 16, as the access opening 18 to the pressure-side air duct 19. This outlet opening 24 is located such that, in addition to the mounted fan housing 11, that the suction-side air passage 22 extends below the blower housing 11. To connect this outlet opening 24 with the air inlet 14 of the blower housing 11 is a connection housing 25, which with its flat side on the provided with the air inlet 14 side wall of the blower housing 11 abuts and covered with a narrow side of the outlet opening 24, so that the suction-side air flow through the suction-side air passage 22, the outlet opening 24, the connecting housing 25 and the air inlet 14 can flow into the fan housing 11 axially. The suction-side air streams are shown for clarity as double arrows and the pressure-side air streams as bold arrows, this representation is problematic in Figure 2, since the two air channels 19, 22 are arranged one behind the other.

Die beiden Luftkanäle 19, 22 sind derart am Flachgehäuse 16 angeordnet, dass der Endbereich des druckseitigen Luftkanals 19 und der Anfangsbereich des saugseitigen Luftkanals 22 direkt nebeneinander verlaufen und lediglich durch eine Zwischenwandung 26 getrennt sind. Der druckseitige Luftkanal 19 besitzt in Folge seiner G-, U- bzw. bogenartigen Gestalt eine Krümmung. Die entsprechend gekrümmte Zwischenwandung 26 wird an dieser Stelle durch eine schwenkbare Luftklappe 27 gebildet, durch die ein Bypass vom druckseitigen Luftkanal 19 zum saugseitigen Luftkanal 22 mit variablem Querschnitt gebildet werden kann. Je nach Öffnungswinkel dieser Luftklappe 27 wird mehr oder weniger die energiereiche Strömung im Luftkanal 19 teilweise der energieärmeren saugseitigen Strömung im Luftkanal 22 zugemischt. Hierdurch kann die Gebläseleistung und im Falle der Anwendung bei einem Brenner die Brennerleistung e-nergieverlust- und geräuscharm reguliert oder geregelt werden. Hierzu kann die Luftklappe 27 mit einem nicht dargestellten Stellglied, beispielsweise einem Stellmotor versehen sein. Die Luftklappe 27 ist dabei als Strömungsführungsorgan ausgestaltet, um die energiereiche Luftströmung möglichst verlustarm dem Luftkanal 22 zuführen zu können.The two air ducts 19, 22 are arranged on the flat housing 16 in such a way that the end region of the pressure-side air duct 19 and the starting region of the suction-side air duct 22 run directly next to one another and are only separated by an intermediate wall 26. The pressure-side air channel 19 has a curvature as a result of its G, U or arc-like shape. The correspondingly curved intermediate wall 26 is formed at this point by a pivotable air damper 27, through which a bypass from the pressure-side air duct 19 to the suction-side air duct 22 can be formed with a variable cross-section. Depending on the opening angle of this air damper 27, more or less the high-energy flow in the air duct 19 is partially mixed with the lower-energy suction-side flow in the air duct 22. As a result, the fan power and, in the case of a burner, the burner output can be regulated or regulated with low energy loss and low noise. For this purpose, the air damper 27 may be provided with an actuator, not shown, for example, a servomotor. The air damper 27 is designed as a flow-guiding member in order to be able to supply the high-energy air flow to the air duct 22 with as little loss as possible.

An Stelle einer Luftklappe 27 kann selbstverständlich auch ein anderes Einstellorgan für eine Verbindungsöffnung zwischen den beiden Luftkanälen 19, 22 treten, beispielsweise eine verschiebbare oder verschwenkbare Blende.In place of an air damper 27, of course, another adjustment member for a connection opening between the two air channels 19, 22 occur, for example, a displaceable or pivotable aperture.

An Stelle eines Flachgehäuses 16 kann selbstverständlich auch eine andere Gehäuseform für die Luftführungsanordnung 17 treten. Wesentlich ist es dabei, dass eine Zumischung der energiereichen druckseitigen Luftströmung zur energiearmen saugseitigen Luftströmung in variabler Weise möglich ist.Of course, instead of a flat housing 16, a different housing form for the air guide arrangement 17 can occur. It is essential in this case that an admixture of the high-energy pressure-side air flow to the low-energy suction-side air flow is possible in a variable manner.

Die Erfindung ist selbstverständlich nicht auf Radialgebläse beschränkt, vielmehr können auch andere Gebläseformen eingesetzt und mit einer entsprechenden Luftführungsanordnung 17 verbunden werden. Prinzipiell ist es auch möglich, ein kombiniertes Gebläse- und Luftführungsgehäuse zu realisieren.The invention is of course not limited to radial fans, but other types of fans can be used and connected to a corresponding air duct assembly 17. In principle, it is also possible to realize a combined fan and air duct housing.

Claims (11)

  1. Fan assembly, in particular a radial fan assembly, with a fan housing (11) containing a fan impeller (12) and having an air intake (14) and an air outlet (15), and connected to an air guidance assembly (17) in which an air passage (19) connected to the fan housing (11) on the outlet side is connected to an outflow orifice (20) on the outlet side, and an air passage (22) connected to the fan housing (11) on the inlet side is connected to an inflow orifice (23) on the inlet side via an adjustable orifice, in such a way that a portion of the outlet-side airflow is fed to the inlet-side airflow, wherein the two air passages (19, 22) are so arranged in a flat housing (16) that the end section of the outlet-side air passage (19) and the initial section of the inlet-side air passage (22) run directly adjacent to one another and are separated only by a partition (26) with the adjustable orifice, wherein the adjustable orifice is so designed that the partial airflow added on the outlet-side is aligned towards the direction of flow of the inlet-side airflow and increases the energy and flow rate of the inlet-side flow.
  2. Fan assembly according to claim 1, characterised in that the adjustable orifice between the outlet-side (19) and the inlet-side air passage (22) is adjustable by means of an adjusting member (27) in the form of an adjustable air throttle.
  3. Fan assembly according to claim 1 or 2, characterised in that the adjustable orifice and/or the adjusting member (27) are/is located on the radial outer side of the outside wall (26) of a curved section of the outlet-side air passage (19).
  4. Fan assembly according to any of the preceding claims, characterised in that the adjusting member (27) is connected to an actuator which adjusts or regulates the air or fan output.
  5. Fan assembly according to any of the preceding claims, characterised in that the outlet-side air passage (19) is in the form of a pressure chamber (19) connected to the fan housing (11) on the outlet-side with an outflow orifice (20) on the outlet-side, wherein the pressure chamber has a larger cross-section, at least in part, relative to the air outlet (15) of the fan housing (11).
  6. Fan assembly according to claim 5, characterised in that the outlet-side air passage (19) is in the form of an outflow diffuser with an air passage increasing in cross-section, in particular increasing continuously, towards the outflow orifice (20).
  7. Fan assembly according to claim 6, characterised in that the air passage (19) is curved with a G- ,U- or bow shape.
  8. Fan assembly according to any of the preceding claims, characterised in that the air guidance assembly (17) is in the form of a flat housing (16), and that the fan housing (11) is attached to a flat side of the flat housing (16), with the air outlet (15) of the fan housing (11) emerging at an access opening (18) to the outlet-side air passage (19).
  9. Fan assembly according to claim 8, characterised in that the inlet-side air passage (22) in the flat housing (16) emerges at an outlet orifice (24) which is connected via a connecting passage or a connection housing (25) to the air intake (14) of the fan housing (11), with this outlet orifice (24) being located preferably on the flat side of the flat housing (16) which has the access opening (18) to the outlet-side air passage (19).
  10. Fan assembly according to any of the preceding claims, characterised in that the outflow orifice (20) of the air guidance assembly (17) is located on the flat side, facing away from the fan housing (11), of the air guidance assembly (17) which is in the form of a flat housing (16).
  11. Fan assembly according to claim 10, characterised in that the outflow orifice (20) leads to a mixer tube (21) connected to the air guidance assembly (17), and/or that the air guidance assembly (17) in the form of a flat housing (16) is designed as cover lid of a heating boiler.
EP00119951A 2000-09-14 2000-09-14 Fan device, in particular radial fan device Expired - Lifetime EP1188930B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT00119951T ATE263925T1 (en) 2000-09-14 2000-09-14 BLOWER ARRANGEMENT, IN PARTICULAR RADIAL FAN ARRANGEMENT
DE50006003T DE50006003D1 (en) 2000-09-14 2000-09-14 Fan arrangement, in particular radial fan arrangement
EP00119951A EP1188930B2 (en) 2000-09-14 2000-09-14 Fan device, in particular radial fan device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00119951A EP1188930B2 (en) 2000-09-14 2000-09-14 Fan device, in particular radial fan device

Publications (3)

Publication Number Publication Date
EP1188930A1 EP1188930A1 (en) 2002-03-20
EP1188930B1 EP1188930B1 (en) 2004-04-07
EP1188930B2 true EP1188930B2 (en) 2007-06-13

Family

ID=8169829

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00119951A Expired - Lifetime EP1188930B2 (en) 2000-09-14 2000-09-14 Fan device, in particular radial fan device

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EP (1) EP1188930B2 (en)
AT (1) ATE263925T1 (en)
DE (1) DE50006003D1 (en)

Families Citing this family (3)

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Publication number Priority date Publication date Assignee Title
ATE324281T1 (en) * 2002-07-25 2006-05-15 Behr Gmbh & Co Kg FAN ARRANGEMENT AND METHOD FOR VENTILATION OF A VEHICLE
EP1528258A1 (en) * 2003-10-31 2005-05-04 Punker GmbH & Co. Radial fan for a gas burner
CN100441880C (en) * 2005-05-13 2008-12-10 台达电子工业股份有限公司 Fan system

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US3356034A (en) * 1965-12-28 1967-12-05 Ford Motor Co Fluid pump flow bypass control
DE2656561A1 (en) * 1976-12-14 1978-06-15 Roehrs Werner Dr Kg RADIAL FAN WITH FLOW SEAL
SE430092B (en) * 1982-01-21 1983-10-17 Lennart Wallman DEVICE FOR RADIAL FLOWERS
DE3629132A1 (en) * 1986-08-27 1988-03-10 Buderus Heiztechnik Gmbh Blower for oil and gas blower burners
EP0271111B1 (en) * 1986-12-11 1991-05-29 Dreizler, Walter Boiler using exterior recycling of combustion gases
DE3839430C1 (en) * 1988-11-23 1989-06-22 Fa. J. Eberspaecher, 7300 Esslingen, De
DE4023363C2 (en) * 1990-07-23 1994-03-03 Kanis Paul Gerhard Dipl Ing burner
US5584653A (en) * 1992-09-08 1996-12-17 J. Eberspacher Device for reducing the generation of noise in fans
DE4230503B4 (en) * 1992-09-15 2004-01-15 Körting Hannover AG blowpipe
US5484259A (en) * 1994-06-13 1996-01-16 Emerson Electric Co. Low noise centrifugal blower
FR2729460B1 (en) * 1995-01-12 1997-04-04 Cuenod Thermotech Sa DEVICE FOR ADJUSTING THE COMBUSTION AIR FLOW FOR A SUPPLY AIR BURNER
DE19501816B4 (en) * 1995-01-21 2004-11-18 Körting Hannover AG Radial blowers, especially for forced draft burners
DE19503781A1 (en) * 1995-02-04 1996-08-08 Buderus Heiztechnik Gmbh Gas or oil burner air flow mixing system
DE19809028A1 (en) * 1998-03-04 1999-09-09 Miele & Cie Gas-heated clothes dryer
DE29820766U1 (en) 1998-11-20 1999-01-14 Punker GmbH & Co., 24340 Eckernförde Radial blower
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DE59910827D1 (en) 1999-01-20 2004-11-18 Punker Gmbh & Co centrifugal blower
DE59910735D1 (en) 1999-01-20 2004-11-11 Punker Gmbh & Co centrifugal blower

Also Published As

Publication number Publication date
DE50006003D1 (en) 2004-05-13
EP1188930A1 (en) 2002-03-20
EP1188930B1 (en) 2004-04-07
ATE263925T1 (en) 2004-04-15

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