EP3372838B1 - Ventilation system with an air guide assembly - Google Patents

Ventilation system with an air guide assembly Download PDF

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Publication number
EP3372838B1
EP3372838B1 EP18160318.4A EP18160318A EP3372838B1 EP 3372838 B1 EP3372838 B1 EP 3372838B1 EP 18160318 A EP18160318 A EP 18160318A EP 3372838 B1 EP3372838 B1 EP 3372838B1
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EP
European Patent Office
Prior art keywords
air
guide plate
ventilation system
plate formation
radial fan
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.)
Active
Application number
EP18160318.4A
Other languages
German (de)
French (fr)
Other versions
EP3372838A1 (en
Inventor
Jürgen Schöne
Daniel Conrad
Michael Strehle
Daniel Gebert
Jens Müller
Björn Sudler
Oliver Haaf
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ebm Papst Mulfingen GmbH and Co KG
Original Assignee
Ebm Papst Mulfingen GmbH and Co KG
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Publication of EP3372838A1 publication Critical patent/EP3372838A1/en
Application granted granted Critical
Publication of EP3372838B1 publication Critical patent/EP3372838B1/en
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Classifications

    • 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
    • F04D17/165—Axial entry and discharge
    • 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
    • F04D29/4253—Fan casings with axial entry and discharge
    • 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
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid 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
    • 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
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
    • F04D29/444—Bladed diffusers
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/007—Ventilation with forced flow
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/663—Sound attenuation
    • F04D29/664—Sound attenuation by means of sound absorbing material
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/663—Sound attenuation
    • F04D29/665—Sound attenuation by means of resonance chambers or interference
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/50—Building or constructing in particular ways
    • F05D2230/54—Building or constructing in particular ways by sheet metal manufacturing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2250/00—Geometry
    • F05D2250/50—Inlet or outlet
    • F05D2250/52—Outlet

Definitions

  • the invention relates to a ventilation system for air conditioning with an air guiding arrangement for a radial fan, preferably for a duct-shaped housing with a rectangular, round or square cross section.
  • Air guiding arrangements and air deflection devices are known in the prior art in different designs.
  • the simplest embodiments are metal sheets with which the direction of flow in an air stream is deflected.
  • An air deflector is for example from the DE 89 08 987 U known.
  • the deflection of the air from the radial to the axial direction takes place exclusively on the housing wall of the conveying channel.
  • the air conveyed to the outside by the blades occurs in the radial direction on the walls of the conveyor channel housing.
  • This leads to strong flow losses and a high level of noise.
  • the DE 4129211 A1 deals with achieving a gentle deflection of the conveyed medium and avoiding turbulence in the area opposite the outflow gap. This is achieved in that the conveying channel is provided with a deflecting funnel which at least encompasses the intake-side edge region of the radial fan impeller and widens in the transport direction of the gas up to the conveying channel cross-section.
  • Radial fans are generally known and comprise an impeller driven by means of a drive motor.
  • the impeller generally has a cover disk on its downstream side, which is adjoined by the impeller blades.
  • the air is usually drawn in parallel to the drive axis of the radial fan, thus axially, and deflected by 90 ° by the rotation of the impeller and expelled radially. So that the sucked in air is thus radially outwards, i. H. blown towards the wall of a channel-shaped housing. So that the air on the pressure side of the centrifugal fan, i. H. on the downstream side, flowing again in the main flow direction, the air flow must be deflected again by 90 ° on the wall. This creates eddies and an undesirable pressure loss, which reduces the overall efficiency of a centrifugal fan in such an application.
  • the invention is therefore based on the object of avoiding the aforementioned disadvantages and of specifying an arrangement in which the outflow of the conveyed Air or gas amount of the radial fan is improved, so that as a result the efficiency is increased due to a lower pressure loss.
  • the aim is to let the air flow sucked in by a radial fan flow out into a duct-shaped housing with as little loss as possible.
  • a basic idea of the invention is to arrange the radial air flow of the radial fan over one or more guide plate formations made of specifically arranged and shaped guide plates on the downstream side behind a radial fan so that the existing swirl is reduced by inserting the guide plates against the swirl direction.
  • the flow cross-section is expanded along the baffle formation in order to achieve a diffuser effect.
  • a ventilation system is therefore provided with a duct-shaped housing, an air guide arrangement and a radial fan arranged on a cross-sectional plane in the housing, the air guide arrangement comprising at least one guide plate formation made up of several differently oriented air guide plates, with an air passage channel between the air guide plates of the guide plate formation (s) and the interior of the housing is designed in such a way that the existing swirl is reduced in that the guide plates are oriented against the swirl direction.
  • a further baffle formation is also formed on the suction side as a substantially pyramid-shaped and / or funnel-shaped baffle formation with a square or rectangular cross-section, which preferably corresponds to the cross-section of the channel-shaped housing in which the air guiding arrangement is intended to be used .
  • this suction-side baffle formation is formed or formed from four essentially flat, trapezoidal air baffles, each provided with a central opening at an angle of incidence ⁇ on a nozzle acting as a nozzle and arranged in the cross-sectional plane of the housing Base plate are connected.
  • a pyramid-shaped guide plate formation is thus created in which the side walls are preferably oriented at an angle of incidence ⁇ between 45 ° and 80 ° with respect to the cross-sectional plane.
  • the baffle formation arranged on the outflow side which is to be provided on the outflow side behind the radial fan, is designed as a substantially pyramidal or funnel-shaped baffle formation with a base running in the cross-sectional plane of the housing with a substantially square or rectangular cross section is.
  • the outflow-side baffle formation it is provided that it is formed from four double-edged air baffles arranged in pairs, which are edged and arranged to one another so that the aforementioned pyramidal or funnel-shaped baffle formation results.
  • the individual baffles each form a triangular sheet metal section which each forms a partial segment of the base of the downstream baffle formation.
  • This triangular sheet metal section is adjoined by a rectangular sheet metal section with two side edges, which are bent or beveled essentially in the axial direction of the radial fan, the baffles preferably being arranged rotated by an angle ⁇ of 0 ° to 20 ° with respect to the axial direction.
  • Another sheet metal section is preferably formed on the respective guide plate as an angled fin, specifically preferably on the triangular sheet metal section.
  • the bending angle ⁇ 1 of the two guide plates of a pair of guide plates of the respective rectangular plate sections is different from the triangular plate sections, namely with a difference angle of approximately 3 ° to 10 °.
  • the same angles are also conceivable.
  • outflow-side baffle formation that does not belong to the invention, it is provided that it is formed from four air baffles, each angled along one edge, each with a first flat trapezoidal baffle section, which are connected at a defined setting angle to a base plate arranged in the cross-sectional plane, are formed. It is further preferably provided that the angled air baffles adjoining the said edge each form an outflow-side flat, preferably trapezoidal, baffle section which is oriented at a greater angle of incidence than the incidence angle of the aforementioned conductor plate section with respect to the cross-sectional plane.
  • the suction-side and / or outflow-side guide plate formation has at least a plurality of preferably rectangular and / or curved air guide vanes which extend in the radial direction.
  • the majority of the air guide vanes can be connected or arranged on the outer surface of the air guide plates of the downstream guide plate formation or on the inner surface of the first guide plate formation. In the first case, the majority of the air guide vanes extend outward as far as possible that they extend as far as the inner wall of the housing in the installed state of the air guide arrangement.
  • the majority of the air guide vanes extend inward as far as possible that they extend to the outer contour of the radial fan (viewed in the axial direction) when the air guide arrangement is installed.
  • Another aspect of the present invention relates to an air guiding arrangement as described above, which is arranged in a channel-shaped housing of a ventilation system for air conditioning at least partially around a radial fan, with a baffle formation as described above being arranged on the downstream side behind the radial fan.
  • FIG. 1 is a sectional view through a channel-shaped housing 30 of a ventilation system in which a radial fan 40 is arranged with fan blades 41, which can be set in rotation by a motor 42.
  • An air flow is indicated, the course of which is shown schematically with the aid of the arrows shown.
  • the radial fan sucks in air axially via the suction opening A, which air is then first converted into a radial flow in the area of the fan blades 41 and then converted back into an axial flow on the outflow side.
  • FIG. 3 is a perspective view of an exemplary embodiment of an air guiding arrangement 1 and, next to it, a sectional view of this air guiding arrangement 1 in one channel-shaped housing 30 with a radial fan 40 is shown.
  • This exemplary embodiment is first described in order to explain the geometries of the air guiding arrangement 1 in more detail, in particular with regard to the radial fan 40 and the housing 30.
  • the air guide arrangement 1 is arranged around the radial fan 40 arranged on the cross-sectional plane E.
  • This air guiding arrangement 1 additionally shows a suction-side guiding plate formation 10 of four air guiding plates 11, each oriented at a 90 ° angle offset to one another. These can also be formed from a single correspondingly shown plate, as well as one on the outflow side
  • Baffle formation 20 made up of several air baffles 21 bent along an edge line K. Between the air baffles 11, 21 of the baffle formations 10, 20 and the interior 31 of the housing 30, an air passage 2 is formed, whereby due to the different angles of incidence ⁇ 1, ⁇ 2 of the sections of the air baffles 21 of the effective flow cross section for the air conveyed by the radial fan 40 in the flow direction S increases in this area.
  • the guide plate formation 10 represents a substantially funnel-shaped or pyramid-shaped guide plate formation 10 with a square cross-section. This is formed from four flat, interconnected trapezoidal air guide plates 11, which are each arranged at the same angle of incidence ⁇ on one in the cross-sectional plane E as a nozzle acting with a central opening provided base plate 12 are connected.
  • the angle of incidence ⁇ of the air guide plates 11 is preferably between 45 ° and 80 °.
  • the outflow-side baffle formation 20 is formed from an air baffle 21 which is angled (folded) along an edge K and which forms four sheet metal segments.
  • This baffle formation 20 represents a substantially funnel-shaped baffle formation with a square cross section.
  • Each of the four segments of the air baffle 21 has a first flat baffle section 21a which is connected to the base plate 22 arranged in the cross-sectional plane E at an angle of incidence ⁇ 1.
  • Each of the four segments of the air baffle 21 furthermore has an outflow-side (adjoining the first baffle section 21a) flat Guide plate section 21b, which is oriented at an angle of incidence ⁇ 2 with respect to the cross-sectional plane E.
  • the setting angle ⁇ 1 is preferably between 30 ° and 90 °, while the setting angle ⁇ 2 is preferably between 90 ° and 100 °.
  • the ratio Xa / La of the distance Xa from the edge K of the air baffle 21 to the base 22 to the diameter La of the radial fan is between 0.05 and 0.5.
  • the angled shape of the downstream guide plate formation 20 brings about an expansion of the flow cross section. This leads to a reduction in the flow velocity and thus to an increase in the static pressure.
  • the axial length of the guide plate section 21b measured from the edge K to the rear edge is denoted by Xb.
  • a preferred selection for the ratio Xb / La is in the range from 0.15 to 0.8.
  • Preferred sizes for Yb / LA are between 1.1 and 2.0.
  • FIG. 2 to 5 views of an air guide arrangement 1 of a ventilation system according to the invention in a duct-shaped housing 30 with a radial fan 40 are shown.
  • the two air guide formations 10, 20 are also essentially funnel-shaped or pyramid-shaped here.
  • the first baffle formation 10 is, as in the embodiment described above, according to Fig. 6 educated.
  • the second guide plate formation 20 is formed from four double-edged air guide plates 21 arranged in pairs.
  • the shape of the individual air baffles 21 is shown in FIG Figure 3 clearly visible.
  • the individual guide plates 21 each form a triangular plate section 21d, which in each case forms a subsegment of the base 22 of the guide plate formation 20 on the downstream side.
  • This triangular sheet metal section 21d is adjoined by a rectangular sheet metal section 21e, bent or bevelled essentially in the axial direction of the radial fan 40, each with two side edges 21k, the guide plates being arranged rotated by an angle Winkel of 0 ° to 20 ° with respect to the axial direction are (see Fig. 5 ).
  • Another sheet metal section 21f is preferably formed on the respective air baffle 21 as an angled fin, specifically preferably on the triangular sheet metal section 21d.
  • the bending angle ⁇ 1 of the two guide plates of a guide plate pair of the respective rectangular sheet metal sections 21e compared to the triangular sheet metal sections 21d is different in such a way that this difference angle is approximately +/- 3 ° to +/- 10 °, which is shown in the sectional view of FIG Fig. 2 you can see.
  • This difference angle results from the fact that one sheet is rotated around the adjacent cathetus and the other sheet is rotated around the hypotenuse.
  • the ratio Yb / La of the outer edge dimension of the outer guide geometry Yb and the diameter La of the radial fan typically corresponds to values between 1.5 and 2.0.
  • angles between 20 - 80 ° are typically used.
  • FIG. 11 shows a perspective view of a further exemplary embodiment of an air guiding arrangement 1 and a sectional view of this air guiding arrangement 1 in a channel-shaped housing 30 with a radial fan 40.
  • This version shows in addition to the version after Fig. 6 a plurality of rectangular and curved air guide vanes 23 on the air baffles 21, which extend in the radial direction up to the inside 31 of the housing 30.
  • the angle of incidence ⁇ of the guide vanes 23 relative to the axial direction is optionally at an angle of 0 ° to 60 °, as is also the case with the execution of the Fig. 8 is shown.
  • the guide vanes 23 cause the existing swirl of the air to be deflected in the axial direction with as little loss as possible, which increases the efficiency of the fan.
  • Typical profile shapes eg NACA profiles
  • simple sheet metal geometries can be used as the profile shape.
  • the ratio SL / La between the chord length SL and the diameter La of the radial fan is preferably between 0.05 and 0.4.
  • the ratio between the axial distance Xi the Guide vane 23 and the diameter La of the radial fan is preferably between 0 and 0.8.
  • FIG. 8 and 9 further exemplary embodiments of an air guiding arrangement 1 are shown.
  • the air guide blades 23 are similarly oriented as in the embodiment of FIG Figure 7 , but attached to the housing 30.
  • the radial distance between the inner end faces of the air guide vanes Yb corresponding to the diameter La of the radial fan 40, ie Yb La.
  • the first and second guide plate formations 10, 20 are, so to speak, connected to one another.
  • the dimensions are to be selected as follows: the ratio Xd / La is between 0.3 and 0.7, the ratio Xe / La is between 0.1 and 1.0, the ratio of Ya / La is between 1.5 and 2.0 and the angle ⁇ is between 45 ° and 80 °, the guide plates 21 of the downstream guide plate formation 20 running approximately parallel to the wall of the housing 30.
  • FIGS. 10 and 11 show views of a further exemplary embodiment of an air guiding arrangement 1.
  • the guiding plate formation 20 consists of a multiple-edged plate. This is edged in such a way that additional guide vanes 21s are created which minimize the swirl and deflect the flow of the air in the axial direction with as little loss as possible.
  • Fig. 12 is a version similar to the Figure 6 shown, but the guide plate formations 10, 20 are formed from perforated plates with holes 14, 24.
  • the cavity behind it is lined with sound-absorbing material, which leads to an increased noise reduction.
  • Such a sound-absorbing measure is also possible with the other versions.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Description

Die Erfindung betrifft eine raumlufttechnische Lüftungsanlage mit einer Luftleitanordnung für einen Radialventilator vorzugsweise für ein kanalförmiges Gehäuse mit einem rechteckigen, runden oder quadratischen Querschnitt.The invention relates to a ventilation system for air conditioning with an air guiding arrangement for a radial fan, preferably for a duct-shaped housing with a rectangular, round or square cross section.

Luftleitanordnungen und Luftumlenkvorrichtungen sind im Stand der Technik in unterschiedlichen Ausführungen bekannt. Einfachste Ausführungsformen sind Bleche, mit denen die Strömungsrichtung in einem Luftstrom umgelenkt wird.Air guiding arrangements and air deflection devices are known in the prior art in different designs. The simplest embodiments are metal sheets with which the direction of flow in an air stream is deflected.

Aus den Druckschriften DE 91 10 195 U1 , EP 2 574 794 und FR 1 260 792 A sind bereits Lösungen zu Luftleitanordnungen bekannt.From the pamphlets DE 91 10 195 U1 , EP 2 574 794 and FR 1 260 792 A solutions to air guiding arrangements are already known.

Eine Luftumlenkvorrichtung ist zum Beispiel aus der DE 89 08 987 U bekannt. Bei dieser bekannten Anordnung findet die Umlenkung der Luft von der radialen in die axiale Richtung ausschließlich an der Gehäusewandung des Förderkanals statt. Die von den Schaufeln nach außen geförderte Luft tritt dabei in radialer Richtung auf die Wandungen des Förderkanalgehäuses auf. Dies führt zu starken Strömungsverlusten und zu einer starken Lärmentwicklung. Zudem kann es hierbei in dem Abströmspalt zwischen Abströmblech und Gehäusewand gegenüberliegenden, trennblechnahen Bereich zu starken Turbulenzen kommen, die nicht nur die erwähnten Nachteile verstärken, sondern vor allem auch einer Volumenstromregelung durch Veränderung des Spalts zwischen Einströmdüse und Einströmstutzen des Ventilatorrads ungünstig entgegenstehen.An air deflector is for example from the DE 89 08 987 U known. In this known arrangement, the deflection of the air from the radial to the axial direction takes place exclusively on the housing wall of the conveying channel. The air conveyed to the outside by the blades occurs in the radial direction on the walls of the conveyor channel housing. This leads to strong flow losses and a high level of noise. In addition, there can be strong turbulence in the outflow gap between the outflow plate and the housing wall, opposite the area close to the separator plate, which not only intensifies the disadvantages mentioned, but also adversely affects volume flow control by changing the gap between the inlet nozzle and the inlet connection of the fan wheel.

Die DE 4129211 A1 beschäftigt sich damit eine sanfte Umlenkung des geförderten Mediums zu erreichen und Turbulenzen im dem Abströmspalt gegenüberliegenden Bereich zu vermeiden. Dies wird dadurch gelöst, dass der Förderkanal mit einem zumindest den ansaugseitigen Randbereich des Radialventilatorlaufrads mit Abstand umfassenden, in Transportrichtung des Gases bis auf den Förderkanalquerschnitt sich erweiternden Umlenktrichter versehen ist.The DE 4129211 A1 deals with achieving a gentle deflection of the conveyed medium and avoiding turbulence in the area opposite the outflow gap. This is achieved in that the conveying channel is provided with a deflecting funnel which at least encompasses the intake-side edge region of the radial fan impeller and widens in the transport direction of the gas up to the conveying channel cross-section.

Radialventilatoren sind allgemein bekannt und umfassen ein mittels eines Antriebsmotors angetriebenes Laufrad. Das Laufrad weist im Allgemeinen auf seiner Abströmseite eine Deckscheibe auf, an die die Laufradflügel angrenzen. Die Luft wird bei einem Radialventilator üblicherweise parallel zur Antriebsachse des Radialventilators, somit axial angesaugt und durch die Rotation des Laufrades um 90° umgelenkt und radial ausgeblausen. Damit wird die angesaugte Luft somit radial nach außen, d. h. in Richtung der Wandung eines kanalförmigen Gehäuses geblasen. Damit die Luft an der Druckseite des Radialventilators, d. h. an der Abströmseite, wieder in die Hauptströmungsrichtung fließt, muss der Luftstrom erneut an der Wandung um 90° umgelenkt werden. Dabei entstehen Wirbel und ein unerwünschter Druckverlust, der den Gesamt-Wirkungsgrad eines Radialventilators in einer solchen Anwendung vermindert.Radial fans are generally known and comprise an impeller driven by means of a drive motor. The impeller generally has a cover disk on its downstream side, which is adjoined by the impeller blades. With a radial fan, the air is usually drawn in parallel to the drive axis of the radial fan, thus axially, and deflected by 90 ° by the rotation of the impeller and expelled radially. So that the sucked in air is thus radially outwards, i. H. blown towards the wall of a channel-shaped housing. So that the air on the pressure side of the centrifugal fan, i. H. on the downstream side, flowing again in the main flow direction, the air flow must be deflected again by 90 ° on the wall. This creates eddies and an undesirable pressure loss, which reduces the overall efficiency of a centrifugal fan in such an application.

Der Erfindung liegt deshalb die Aufgabe zugrunde, die vorgenannten Nachteile zu vermeiden und eine Anordnung anzugeben, bei der die Abströmung der beförderten Luft- oder Gasmenge des Radialventilators verbessert wird, so dass infolgedessen der Wirkungsgrad aufgrund eines geringeren Druckverlustes erhöht wird. Ziel ist es damit, den von einem Radialventilator angesaugten Luftstrom möglichst verlustfrei in ein kanalförmiges Gehäuse ausströmen zu lassen.The invention is therefore based on the object of avoiding the aforementioned disadvantages and of specifying an arrangement in which the outflow of the conveyed Air or gas amount of the radial fan is improved, so that as a result the efficiency is increased due to a lower pressure loss. The aim is to let the air flow sucked in by a radial fan flow out into a duct-shaped housing with as little loss as possible.

Diese Aufgabe wird durch die Merkmalskombination gemäß Anspruch 1 gelöst.This object is achieved by the combination of features according to claim 1.

Ein Grundgedanke der Erfindung besteht darin, den radialen Luftstrom des Radialventilators über eine bzw. mehrere Leitblechformationen aus spezifisch angeordneten und geformten Leitblechen abströmseitig hinter einem Radialventilator so anzuordnen, dass der vorhandene Drall abgebaut wird, indem die Leitbleche entgegen der Drallrichtung eingesetzt sind. Zusätzlich wird der Strömungsquerschnitt entlang der Leitblechformation erweitert, um dadurch einen Diffusoreffekt zu erzielen.A basic idea of the invention is to arrange the radial air flow of the radial fan over one or more guide plate formations made of specifically arranged and shaped guide plates on the downstream side behind a radial fan so that the existing swirl is reduced by inserting the guide plates against the swirl direction. In addition, the flow cross-section is expanded along the baffle formation in order to achieve a diffuser effect.

Erfindungsgemäß ist daher eine raumlufttechnische Lüftungsanlage vorgesehen mit einem kanalförmigen Gehäuse , einer Luftleitanordnung und einem auf einer Querschnittsebene in dem Gehäuse angeordneten Radialventilator, wobei die Luftleitanordnung wenigstens eine Leitblechformation aus mehreren unterschiedlich zueinander orientierten Luftleitblechen umfasst, wobei ein Luftdurchtrittskanal zwischen den Luftleitblechen der Leitblechformation(en) und dem Inneren des Gehäuse so ausgebildet wird, dass der vorhandene Drall abgebaut wird, indem die Leitbleche entgegen der Drallrichtung orientiert sind.According to the invention, a ventilation system is therefore provided with a duct-shaped housing, an air guide arrangement and a radial fan arranged on a cross-sectional plane in the housing, the air guide arrangement comprising at least one guide plate formation made up of several differently oriented air guide plates, with an air passage channel between the air guide plates of the guide plate formation (s) and the interior of the housing is designed in such a way that the existing swirl is reduced in that the guide plates are oriented against the swirl direction.

In einer bevorzugten Ausgestaltung der Erfindung ist vorgesehen, dass ferner ansaugseitig eine weitere Leitblechformation als eine im Wesentlichen pyramidenförmige und/oder trichterförmige Leitblechformation mit einem quadratischen oder rechteckigen Querschnitt ausgebildet ist, die bevorzugt dem Querschnitt des kanalförmigen Gehäuses entspricht in welches die Luftleitanordnung bestimmungsgemäß eingesetzt werden soll.In a preferred embodiment of the invention it is provided that a further baffle formation is also formed on the suction side as a substantially pyramid-shaped and / or funnel-shaped baffle formation with a square or rectangular cross-section, which preferably corresponds to the cross-section of the channel-shaped housing in which the air guiding arrangement is intended to be used .

Weiter vorteilhaft ist es, wenn diese ansaugseitige Leitblechformation aus vier im Wesentlichen flachen, trapezförmigen Luftleitblechen geformt bzw. ausgebildet wird, welche jeweils unter einem Anstellwinkel α an einer in der Querschnittsebene des Gehäuses angeordneten, als Düse wirkenden mit einer zentralen Öffnung versehenen Basisplatte verbunden sind. Somit wird eine pyramidenförmige Leitblechformation geschaffen, bei denen die Seitenwände bevorzugt unter einem Anstellwinkel α zwischen 45° und 80° gegenüber der Querschnittsebene orientiert sind.It is also advantageous if this suction-side baffle formation is formed or formed from four essentially flat, trapezoidal air baffles, each provided with a central opening at an angle of incidence α on a nozzle acting as a nozzle and arranged in the cross-sectional plane of the housing Base plate are connected. A pyramid-shaped guide plate formation is thus created in which the side walls are preferably oriented at an angle of incidence α between 45 ° and 80 ° with respect to the cross-sectional plane.

In einer bevorzugten Ausgestaltung der Erfindung ist vorgesehen, dass die abströmseitig angeordnete Leitblechformation, die abströmseitig hinter dem Radialventilator vorzusehen ist, als eine im Wesentlichen pyramiden- oder trichterförmige Leitblechformation mit einer in der Querschnittsebene des Gehäuses verlaufenden Basis mit einem im Wesentlichen quadratischen oder rechteckigen Querschnitt ausgebildet ist.In a preferred embodiment of the invention it is provided that the baffle formation arranged on the outflow side, which is to be provided on the outflow side behind the radial fan, is designed as a substantially pyramidal or funnel-shaped baffle formation with a base running in the cross-sectional plane of the housing with a substantially square or rectangular cross section is.

In der erfindungsgemäßen Ausgestaltung der abströmseitigen Leitblechformation ist vorgesehen, dass diese aus vier paarweise angeordneten jeweils zweifach gekanteten Luftleitblechen gebildet wird, die so gekantet und zueinander angeordnet sind, dass sich die zuvor erwähnte pyramiden- oder trichterförmige Leitblechformation ergibt.In the embodiment according to the invention of the outflow-side baffle formation it is provided that it is formed from four double-edged air baffles arranged in pairs, which are edged and arranged to one another so that the aforementioned pyramidal or funnel-shaped baffle formation results.

Hierzu bilden die einzelnen Leitbleche jeweils einen dreieckigen Blechabschnitt aus, der jeweils ein Teilsegment der Basis der abströmseitigen Leitblechformation bildet. An diesen dreieckigen Blechabschnitt schließt sich ein dazu im Wesentlichen in Axialrichtung des Radialventilators umgebogener bzw. abgekanteter rechteckiger Blechabschnitt mit jeweils zwei Seitenkanten an, wobei die Leitbleche vorzugsweise um einen Winkel ϕ von 0° bis 20° in Bezug auf die Axialrichtung verdreht angeordnet sind. Bevorzugt ist ein weiterer Blechabschnitt an dem jeweiligen Leitblech als abgewinkelte Finne und zwar bevorzugt am dreieckigen Blechabschnitt ausgebildet.For this purpose, the individual baffles each form a triangular sheet metal section which each forms a partial segment of the base of the downstream baffle formation. This triangular sheet metal section is adjoined by a rectangular sheet metal section with two side edges, which are bent or beveled essentially in the axial direction of the radial fan, the baffles preferably being arranged rotated by an angle ϕ of 0 ° to 20 ° with respect to the axial direction. Another sheet metal section is preferably formed on the respective guide plate as an angled fin, specifically preferably on the triangular sheet metal section.

Weiter ist mit Vorteil vorgesehen, dass der Biegewinkel ß1 der beiden Leitbleche eines Leitblechpaares der jeweiligen rechteckigen Blechabschnitte gegenüber den dreieckigen Blechabschnitten unterschiedlich ist und zwar mit einem Differenzwinkel von etwa 3° bis 10°. Alternativ sind auch gleiche Winkel denkbar.It is also advantageously provided that the bending angle β1 of the two guide plates of a pair of guide plates of the respective rectangular plate sections is different from the triangular plate sections, namely with a difference angle of approximately 3 ° to 10 °. Alternatively, the same angles are also conceivable.

In einer nicht zur Erfindung gehörenden Ausgestaltung der abströmseitigen Leitblechformation ist vorgesehen, dass diese aus vier jeweils entlang einer Kante abgewinkelten Luftleitblechen gebildet wird, welche jeweils mit einem ersten flachen trapezförmigen Leitblechabschnitt, der unter einem definierten Anstellwinkel an einer in der Querschnittsebene angeordneten Basisplatte verbunden sind, ausgebildet sind. Weiter bevorzugt ist vorgesehen, dass die abgewinkelten Luftleitbleche angrenzend an die besagte Kante jeweils einen abströmseitigen flachen vorzugsweise ebenfalls trapezförmigen Leitblechabschnitt ausbilden, der unter einem größeren Anstellwinkel, als der Anstellwinkel des zuvor genannten Leiterblechabschnitts gegenüber der Querschnittsebene orientiert ist.In an embodiment of the outflow-side baffle formation that does not belong to the invention, it is provided that it is formed from four air baffles, each angled along one edge, each with a first flat trapezoidal baffle section, which are connected at a defined setting angle to a base plate arranged in the cross-sectional plane, are formed. It is further preferably provided that the angled air baffles adjoining the said edge each form an outflow-side flat, preferably trapezoidal, baffle section which is oriented at a greater angle of incidence than the incidence angle of the aforementioned conductor plate section with respect to the cross-sectional plane.

Es ist in dieser Ausführung weiter mit Vorteil vorgesehen, dass die ansaugseitige und/oder abströmseitige Leitblechformation zumindest eine Mehrzahl an vorzugsweise rechteckigen und/oder gebogenen Luftleitflügeln aufweist, die sich in Radialrichtung erstrecken. Dabei kann die Mehrzahl der Luftleitflügel an der Außenfläche der Luftleitbleche der abströmseitigen Leitblechformation oder an der Innenfläche der ersten Leitblechformation verbunden oder angeordnet sein. Im ersten Fall erstreckt sich die Mehrzahl der Luftleitflügel nach Außen möglichst soweit, dass diese bis zur Innenwand des Gehäuses im eingebauten Zustand der Luftleitanordnung reichen.It is furthermore advantageously provided in this embodiment that the suction-side and / or outflow-side guide plate formation has at least a plurality of preferably rectangular and / or curved air guide vanes which extend in the radial direction. The majority of the air guide vanes can be connected or arranged on the outer surface of the air guide plates of the downstream guide plate formation or on the inner surface of the first guide plate formation. In the first case, the majority of the air guide vanes extend outward as far as possible that they extend as far as the inner wall of the housing in the installed state of the air guide arrangement.

Im abströmseitigen Fall erstreckt sich die Mehrzahl der Luftleitflügel nach Innen möglichst soweit, dass sich diese im eingebauten Zustand der Luftleitanordnung bis zur Außenkontur des Radialventilators (in Axialrichtung betrachtet) erstrecken.In the downstream case, the majority of the air guide vanes extend inward as far as possible that they extend to the outer contour of the radial fan (viewed in the axial direction) when the air guide arrangement is installed.

Ein weiterer Aspekt der vorliegenden Erfindung betrifft eine wie zuvor beschriebene Luftleitanordnung, die in einem kanalförmigen Gehäuse einer raumlufttechnischen Lüftungsanlage zumindest teilweise um einen Radialventilator herum angeordnet ist, wobei eine wie zuvor beschriebene Leitblechformation abströmseitig hinter dem Radialventilator angeordnet ist.Another aspect of the present invention relates to an air guiding arrangement as described above, which is arranged in a channel-shaped housing of a ventilation system for air conditioning at least partially around a radial fan, with a baffle formation as described above being arranged on the downstream side behind the radial fan.

Weiter vorteilhaft ist es, wenn die Geometrien und die Ausrichtung der Leitblechformationen innerhalb bestimmter Größen und Orientierung gewählt wird, die bei der Beschreibung der bevorzugten Ausführungsbeispiele näher beschrieben und angegeben werden.It is also advantageous if the geometries and the alignment of the guide plate formations are selected within certain sizes and orientations, which are described and specified in more detail in the description of the preferred exemplary embodiments.

Andere vorteilhafte Weiterbildungen der Erfindung sind i ausschließlich n den Unteransprüchen gekennzeichnet und werden nachstehend zusammen mit der Beschreibung der bevorzugten Ausführung der Erfindung anhand der Figuren näher dargestellt, wobei die Figuren nicht eine raumlufttechnische Lüftungsanlage als solche, sondern Teile davon zeigen, die im Folgenden erläutert werden. Es zeigen:

Fig. 1
eine Schnittansicht durch ein kanalförmiges Gehäuse mit einem auf einer Querschnittsebene in dem Gehäuse angeordneten Radialventilator;
Fig. 2
eine perspektivische Ansicht eines Ausführungsbeispiels einer Luftleitanordnung sowie eine Schnittansicht dieser Luftleitanordnung in einem kanalförmiges Gehäuse mit einem Radialventilator;
Fig. 3
Detailansichten der Luftleitbleche aus Figur 2;
Fig. 4
eine andere perspektivische Ansicht des Ausführungsbeispiels der Luftleitanordnung aus Figur 2;
Fig. 5
eine Seitenansicht des Ausführungsbeispiels der Luftleitanordnung aus Figur 2 bzw. Fig. 4;
Fig. 6
eine perspektivische Ansicht eines nicht zur Erfindung gehörenden Ausführungsbeispiels einer Luftleitanordnung sowie eine Schnittansicht dieser Luftleitanordnung in einem kanalförmiges Gehäuse mit einem Radialventilator;
Fig. 7
eine perspektivische Ansicht eines weiteren nicht zur Erfindung gehörenden Ausführungsbeispiels einer Luftleitanordnung sowie eine Schnittansicht dieser Luftleitanordnung in einem kanalförmiges Gehäuse mit einem Radialventilator;
Fig. 8
eine perspektivische Ansicht eines weiteren nicht zur Erfindung gehörenden Ausführungsbeispiels einer Luftleitanordnung sowie eine Schnittansicht dieser Luftleitanordnung in einem kanalförmiges Gehäuse mit einem Radialventilator;
Fig. 9
eine perspektivische Ansicht eines weiteren nicht zur Erfindung gehörenden Ausführungsbeispiels einer Luftleitanordnung sowie eine Schnittansicht dieser Luftleitanordnung in einem kanalförmiges Gehäuse mit einem Radialventilator;
Fig. 10
eine perspektivische Ansicht eines weiteren nicht zur Erfindung gehörenden Ausführungsbeispiels einer Luftleitanordnung sowie eine Schnittansicht dieser Luftleitanordnung in einem kanalförmiges Gehäuse mit einem Radialventilator;
Fig. 11
weitere perspektivische Ansichten des Ausführungsbeispiels der Luftleitanordnung aus Figur 10 und
Fig. 12
eine perspektivische Ansicht eines weiteren nicht zur Erfindung gehörenden Ausführungsbeispiels einer Luftleitanordnung mit einer Schalldämpferfunktion sowie eine Schnittansicht dieser Luftleitanordnung in einem kanalförmiges Gehäuse mit einem Radialventilator.
Other advantageous developments of the invention are characterized exclusively in the subclaims and are shown in more detail below together with the description of the preferred embodiment of the invention with reference to the figures, the figures not showing a ventilation system as such, but parts thereof which are explained below . Show it:
Fig. 1
a sectional view through a channel-shaped housing with a radial fan arranged on a cross-sectional plane in the housing;
Fig. 2
a perspective view of an embodiment of an air guiding arrangement and a sectional view of this air guiding arrangement in a channel-shaped housing with a radial fan;
Fig. 3
Detailed views of the air baffles Figure 2 ;
Fig. 4
another perspective view of the embodiment of the air guide assembly from Figure 2 ;
Fig. 5
a side view of the embodiment of the air guide assembly from Figure 2 or. Fig. 4 ;
Fig. 6
a perspective view of an embodiment of an air guiding arrangement not belonging to the invention and a sectional view of this air guiding arrangement in a channel-shaped housing with a radial fan;
Fig. 7
a perspective view of a further embodiment of an air guiding arrangement not belonging to the invention and a sectional view of this air guiding arrangement in a channel-shaped housing with a radial fan;
Fig. 8
a perspective view of a further embodiment of an air guiding arrangement not belonging to the invention and a sectional view of this air guiding arrangement in a channel-shaped housing with a centrifugal fan;
Fig. 9
a perspective view of a further embodiment of an air guiding arrangement not belonging to the invention and a sectional view of this air guiding arrangement in a channel-shaped housing with a radial fan;
Fig. 10
a perspective view of a further embodiment of an air guiding arrangement not belonging to the invention and a sectional view of this air guiding arrangement in a channel-shaped housing with a radial fan;
Fig. 11
further perspective views of the exemplary embodiment of the air guiding arrangement Figure 10 and
Fig. 12
a perspective view of a further embodiment of an air guiding arrangement not belonging to the invention with a silencer function and a sectional view of this air guiding arrangement in a channel-shaped housing with a radial fan.

Im Folgenden wird die Erfindung anhand der Figuren 1 bis 5 mit Hilfe der Beschreibung der verschiedenen Ausführungsformen näher erläutert, wobei gleiche Bezugszeichen auf strukturell und/oder funktional gleiche Bauteile hinweisen. Die Figuren 6 bis 12 zeigen nicht zur Erfindung gehörende Varianten.In the following the invention is based on the Figures 1 to 5 explained in more detail with the aid of the description of the various embodiments, identical reference symbols indicating structurally and / or functionally identical components. The Figures 6 to 12 show variants not belonging to the invention.

In der Fig. 1 ist eine Schnittansicht durch ein kanalförmiges Gehäuse 30 einer raumlufttechnischen Lüftungsanlage gezeigt in dem ein Radialventilator 40 mit Ventilatorschaufeln 41 angeordnet ist, die von einem Motor 42 in Rotation versetzt werden können. Angedeutet ist eine Luftströmung, deren Verlauf schematisch mit Hilfe der dargestellten Pfeile gezeigt ist. Der Radialventilator saugt axial über die Ansaugöffnung A Luft an, die dann im Bereich der Ventilatorschaufeln 41 zunächst in eine radiale und danach abströmseitig wieder in eine axiale Strömung überführt wird.In the Fig. 1 is a sectional view through a channel-shaped housing 30 of a ventilation system in which a radial fan 40 is arranged with fan blades 41, which can be set in rotation by a motor 42. An air flow is indicated, the course of which is shown schematically with the aid of the arrows shown. The radial fan sucks in air axially via the suction opening A, which air is then first converted into a radial flow in the area of the fan blades 41 and then converted back into an axial flow on the outflow side.

In der Fig. 6 ist eine perspektivische Ansicht eines Ausführungsbeispiels einer Luftleitanordnung 1 sowie daneben eine Schnittansicht dieser Luftleitanordnung 1 in einem kanalförmigen Gehäuse 30 mit einem Radialventilator 40 gezeigt. Zunächst wird diese beispielhafte Ausführungsform beschrieben, um die Geometrien der Luftleitanordnung 1 insbesondere in Bezug auf den Radialventilator 40 und das Gehäuse 30 näher zu erläutern.In the Fig. 6 FIG. 3 is a perspective view of an exemplary embodiment of an air guiding arrangement 1 and, next to it, a sectional view of this air guiding arrangement 1 in one channel-shaped housing 30 with a radial fan 40 is shown. This exemplary embodiment is first described in order to explain the geometries of the air guiding arrangement 1 in more detail, in particular with regard to the radial fan 40 and the housing 30.

Die Luftleitanordnung 1 ist um den auf der Querschnittsebene E angeordneten Radialventilator 40 herum angeordnet. Diese Luftleitanordnung 1 zeigt ergänzend eine ansaugseitige Leitblechformation 10 aus vier jeweils im 90° Winkel-Versatz zueinander orientierten Luftleitblechen 11. Diese können auch aus einem einzigen entsprechend gezeigten Blech gebildet sein, sowie abströmseitig eineThe air guide arrangement 1 is arranged around the radial fan 40 arranged on the cross-sectional plane E. This air guiding arrangement 1 additionally shows a suction-side guiding plate formation 10 of four air guiding plates 11, each oriented at a 90 ° angle offset to one another. These can also be formed from a single correspondingly shown plate, as well as one on the outflow side

Leitblechformation 20 aus mehreren entlang einer Kantlinie K abgekanteter Luftleitbleche 21. Zwischen den Luftleitblechen 11, 21 der Leitblechformationen 10, 20 und dem Inneren 31 des Gehäuse 30 ist ein Luftdurchtrittskanal 2 ausgebildet, wobei aufgrund der unterschiedlichen Anstellwinkel β1, β2 der Abschnitte der Luftleitbleche 21 der effektive Strömungsquerschnitt für die vom Radialventilator 40 geförderte Luft in Strömungsrichtung S in diesem Bereich zunimmt.Baffle formation 20 made up of several air baffles 21 bent along an edge line K. Between the air baffles 11, 21 of the baffle formations 10, 20 and the interior 31 of the housing 30, an air passage 2 is formed, whereby due to the different angles of incidence β1, β2 of the sections of the air baffles 21 of the effective flow cross section for the air conveyed by the radial fan 40 in the flow direction S increases in this area.

Die Leitblechformation 10 stellt eine im Wesentlichen trichter- bzw. pyramidenförmige Leitblechformation 10 mit einem quadratischen Querschnitt dar. Diese ist aus vier flachen, miteinander verbundenen trapezförmigen Luftleitblechen 11 ausgebildet, welche jeweils unter einem gleichen Anstellwinkel α an einer in der Querschnittsebene E angeordneten, als Düse wirkenden mit einer zentralen Öffnung versehenen Basisplatte 12 verbunden sind. Der Anstellwinkel α der Luftleitbleche 11 ist bevorzugt zwischen 45° und 80°.The guide plate formation 10 represents a substantially funnel-shaped or pyramid-shaped guide plate formation 10 with a square cross-section. This is formed from four flat, interconnected trapezoidal air guide plates 11, which are each arranged at the same angle of incidence α on one in the cross-sectional plane E as a nozzle acting with a central opening provided base plate 12 are connected. The angle of incidence α of the air guide plates 11 is preferably between 45 ° and 80 °.

Die abströmseitige Leitblechformation 20 wird aus einem entlang einer Kante K abgewinkelten (gekanteten) Luftleitblech 21 gebildet, das vier Blechsegmente ausbildet. Diese Leitblechformation 20 stellt eine im Wesentlichen trichterförmige Leitblechformation mit einem quadratischen Querschnitt dar. Jedes der vier Segmente des Luftleitblechs 21 weist einen ersten flachen Leitblechabschnitt 21a auf, der unter einem Anstellwinkel β1 an der in der Querschnittsebene E angeordneten Basisplatte 22 verbunden ist. Jedes der vier Segmente des Luftleitblechs 21 weist ferner einen abströmseitigen (sich an den ersten Leitblechabschnitt 21a anschließenden) flachen Leitblechabschnitt 21b auf, der unter einem Anstellwinkel β2 gegenüber der Querschnittsebene E orientiert ist. Der Anstellwinkel β1 ist bevorzugt zwischen 30° und 90°, während der Anstellwinkel β2 bevorzugt zwischen 90° und 100° beträgt.The outflow-side baffle formation 20 is formed from an air baffle 21 which is angled (folded) along an edge K and which forms four sheet metal segments. This baffle formation 20 represents a substantially funnel-shaped baffle formation with a square cross section. Each of the four segments of the air baffle 21 has a first flat baffle section 21a which is connected to the base plate 22 arranged in the cross-sectional plane E at an angle of incidence β1. Each of the four segments of the air baffle 21 furthermore has an outflow-side (adjoining the first baffle section 21a) flat Guide plate section 21b, which is oriented at an angle of incidence β2 with respect to the cross-sectional plane E. The setting angle β1 is preferably between 30 ° and 90 °, while the setting angle β2 is preferably between 90 ° and 100 °.

Das Verhältnis Xa/La des Abstands Xa der Kante K des Luftleitblechs 21 bis zur Basis 22 zum Durchmesser La des Radialventilators liegt zwischen 0,05 und 0,5 liegt. In dieser Ausführung wird durch die gekantete Form der abströmseitigen Leitblechformation 20 eine Erweiterung des Strömungsquerschnitts bewirkt. Dies führt zu einer Verringerung der Strömungsgeschwindigkeit und somit zu einer Steigerung des statischen Druckes. Die axiale Länge des Leitblechabschnitts 21b von der Kante K bis zu Hinterkante gemessen, ist mit Xb bezeichnet. Eine bevorzugte Auswahl für das Verhältnis Xb/ La liegt im Bereich von 0,15 bis 0,8. Bevorzugte Größen für Yb/LA liegen zwischen 1,1 und 2,0.The ratio Xa / La of the distance Xa from the edge K of the air baffle 21 to the base 22 to the diameter La of the radial fan is between 0.05 and 0.5. In this embodiment, the angled shape of the downstream guide plate formation 20 brings about an expansion of the flow cross section. This leads to a reduction in the flow velocity and thus to an increase in the static pressure. The axial length of the guide plate section 21b measured from the edge K to the rear edge is denoted by Xb. A preferred selection for the ratio Xb / La is in the range from 0.15 to 0.8. Preferred sizes for Yb / LA are between 1.1 and 2.0.

In den Figuren 2 bis 5 sind Ansichten einer Luftleitanordnung 1 einer erfindungsgemäßen raumlufttechnischen Lüftungsanlage in einem kanalförmigen Gehäuse 30 mit einem Radialventilator 40 gezeigt. Die beiden Luftleitformationen 10, 20 sind hier ebenfalls im Wesentlichen trichter- bzw. pyramidenförmig. Die erste Leitblechformation 10 ist, wie in der zuvor beschriebenen Ausführung nach der Fig. 6 ausgebildet.In the Figures 2 to 5 views of an air guide arrangement 1 of a ventilation system according to the invention in a duct-shaped housing 30 with a radial fan 40 are shown. The two air guide formations 10, 20 are also essentially funnel-shaped or pyramid-shaped here. The first baffle formation 10 is, as in the embodiment described above, according to Fig. 6 educated.

Die zweite Leitblechformation 20 ist aus vier paarweise angeordneten zweifach gekanteten Luftleitblechen 21 geformt. Die Form der einzelnen Luftleitbleche 21 ist in der Figur 3 gut zu erkennen. Hierzu bilden die einzelnen Leitbleche 21 jeweils einen dreieckigen Blechabschnitt 21d aus, der jeweils ein Teilsegment der Basis 22 der abströmseitigen Leitblechformation 20 bildet. An diesen dreieckigen Blechabschnitt 21d schließt sich ein dazu im Wesentlichen in Axialrichtung des Radialventilators 40 umgebogener bzw. abgekanteter rechteckiger Blechabschnitt 21e mit jeweils zwei Seitenkanten 21k an, wobei die Leitbleche um einen Winkel ϕ von 0° bis 20° in Bezug auf die Axialrichtung verdreht angeordnet sind (siehe Fig. 5). Bevorzugt ist ein weiterer Blechabschnitt 21f an dem jeweiligen Luftleitblech 21 als abgewinkelte Finne und zwar bevorzugt am dreieckigen Blechabschnitt 21d ausgebildet.The second guide plate formation 20 is formed from four double-edged air guide plates 21 arranged in pairs. The shape of the individual air baffles 21 is shown in FIG Figure 3 clearly visible. For this purpose, the individual guide plates 21 each form a triangular plate section 21d, which in each case forms a subsegment of the base 22 of the guide plate formation 20 on the downstream side. This triangular sheet metal section 21d is adjoined by a rectangular sheet metal section 21e, bent or bevelled essentially in the axial direction of the radial fan 40, each with two side edges 21k, the guide plates being arranged rotated by an angle Winkel of 0 ° to 20 ° with respect to the axial direction are (see Fig. 5 ). Another sheet metal section 21f is preferably formed on the respective air baffle 21 as an angled fin, specifically preferably on the triangular sheet metal section 21d.

Der Biegewinkel β1 der beiden Leitbleche eines Leitblechpaares der jeweiligen rechteckigen Blechabschnitte 21e gegenüber den dreieckigen Blechabschnitten 21d ist unterschiedlich und zwar dergestalt, dass dieser Differenzwinkel etwa +/- 3° bis +/-10° beträgt, was in der Schnittansicht der Fig. 2 zu sehen ist. Dieser Differenzwinkel ergibt sich dadurch, dass das eine Blech um die Ankathete und das andere Blech um die Hypotenuse gedreht wird.The bending angle β1 of the two guide plates of a guide plate pair of the respective rectangular sheet metal sections 21e compared to the triangular sheet metal sections 21d is different in such a way that this difference angle is approximately +/- 3 ° to +/- 10 °, which is shown in the sectional view of FIG Fig. 2 you can see. This difference angle results from the fact that one sheet is rotated around the adjacent cathetus and the other sheet is rotated around the hypotenuse.

Das Verhältnis Yb/La des äußeren Kantenmaßes der äußeren Leitgeometrie Yb und dem Durchmesser La des Radialventilators entspricht typischerweise Werte zwischen 1,5 - 2,0. Für den Winkel β1 werden typischerweise Winkel zwischen 20 - 80°verwendet. Das Verhältnis zwischen dem Abstand Xc der Basis 22 der abströmseitigen Leitblechformation 20 zu dem Durchmesser La des Radialventilators liegt vorzugsweise in dem folgenden Wertebereich: 0 < Xc/ La <= 0,8.The ratio Yb / La of the outer edge dimension of the outer guide geometry Yb and the diameter La of the radial fan typically corresponds to values between 1.5 and 2.0. For the angle β1, angles between 20 - 80 ° are typically used. The ratio between the distance Xc of the base 22 of the downstream guide plate formation 20 to the diameter La of the radial fan is preferably in the following range of values: 0 <Xc / La <= 0.8.

Die Fig. 7 zeigt eine perspektivische Ansicht eines weiteren Ausführungsbeispiels einer Luftleitanordnung 1 sowie eine Schnittansicht dieser Luftleitanordnung 1 in einem kanalförmigen Gehäuse 30 mit einem Radialventilator 40.The Fig. 7 FIG. 11 shows a perspective view of a further exemplary embodiment of an air guiding arrangement 1 and a sectional view of this air guiding arrangement 1 in a channel-shaped housing 30 with a radial fan 40.

Diese Ausführung weist ergänzend zur Ausführung nach der Fig. 6 an den Luftleiblechen 21 eine Mehrzahl an rechteckigen und gebogenen Luftleitflügeln 23 auf, die sich in Radialrichtung bis zur Innenseite 31 des Gehäuses 30 erstrecken. Der Anstellwinkel ∈ der Leitflügel 23 gegenüber der Axialrichtung erfolgt wahlweise unter einem Winkel von 0° bis 60°, so wie dies auch bei der Ausführung der Fig. 8 dargestellt ist.This version shows in addition to the version after Fig. 6 a plurality of rectangular and curved air guide vanes 23 on the air baffles 21, which extend in the radial direction up to the inside 31 of the housing 30. The angle of incidence ∈ of the guide vanes 23 relative to the axial direction is optionally at an angle of 0 ° to 60 °, as is also the case with the execution of the Fig. 8 is shown.

In einer solchen Ausführung bewirken die Leitflügel 23 den vorhandenen Drall der Luft möglichst verlustfrei in axiale Richtung umzulenken, was den Wirkungsgrad des Ventilators erhöht. Als Profilform können typische Profilformen (z.B. NACA-Profile) oder auch einfache Blechgeometrien verwendet werden. Das Verhältnis SL/La zwischen der Sehnenlänge SL und dem Durchmesser La des Radialventilators liegt bevorzugt zwischen 0,05 und 0,4. Das Verhältnis zwischen dem axialen Abstand Xi der Leitflügel 23 und dem Durchmesser La des Radialventilators liegt bevorzugt zwischen 0 und 0,8.In such an embodiment, the guide vanes 23 cause the existing swirl of the air to be deflected in the axial direction with as little loss as possible, which increases the efficiency of the fan. Typical profile shapes (eg NACA profiles) or simple sheet metal geometries can be used as the profile shape. The ratio SL / La between the chord length SL and the diameter La of the radial fan is preferably between 0.05 and 0.4. The ratio between the axial distance Xi the Guide vane 23 and the diameter La of the radial fan is preferably between 0 and 0.8.

In den Fig. 8 und 9 sind weitere Ausführungsbeispiele einer Luftleitanordnung 1 gezeigt. In der Figur 8 sind die Luftleitflügel 23 ähnlich orientiert, wie in der Ausführung der Figur 7, jedoch am Gehäuse 30 befestigt. Für die Ausgestaltung und Orientierung der Leitflügel 23 wird auf die Ausführungen der Figuren 6 und 7 verweisen, wobei der radiale Abstand zwischen den innen liegenden Stirnseiten der Luftleitflügel Yb dem Durchmesser La des Radialventilators 40 entspricht, d.h. Yb = La.In the Fig. 8 and 9 further exemplary embodiments of an air guiding arrangement 1 are shown. In the Figure 8 the air guide blades 23 are similarly oriented as in the embodiment of FIG Figure 7 , but attached to the housing 30. For the design and orientation of the guide vanes 23, refer to the explanations of Figures 6 and 7th refer, the radial distance between the inner end faces of the air guide vanes Yb corresponding to the diameter La of the radial fan 40, ie Yb = La.

Bei der Fig. 9 sind sozusagen die erste und zweite Leitblechformation 10, 20 miteinander verbunden. Die Abmessungen sind dabei folgendermaßen zu wählen: das Verhältnis Xd/ La liegt zwischen 0,3 und 0,7, das Verhältnis Xe/ La liegt zwischen 0,1 und 1,0, das Verhältnis von Ya/ La liegt zwischen 1,5 und 2,0 und der Winkel α liegt zwischen 45° und 80°, wobei die Leitbleche 21 der abströmseitigen Leitblechformation 20 in etwa parallel zu der Wand des Gehäuses 30 verlaufen.In the Fig. 9 the first and second guide plate formations 10, 20 are, so to speak, connected to one another. The dimensions are to be selected as follows: the ratio Xd / La is between 0.3 and 0.7, the ratio Xe / La is between 0.1 and 1.0, the ratio of Ya / La is between 1.5 and 2.0 and the angle α is between 45 ° and 80 °, the guide plates 21 of the downstream guide plate formation 20 running approximately parallel to the wall of the housing 30.

Die Figuren 10 und 11 zeigen Ansichten eines weiteren Ausführungsbeispiels einer Luftleitanordnung 1. In dieser Ausführung besteht die Leitblechformation 20 aus einem mehrfach gekanteten Blech. Dieses wird derart gekantet, dass zusätzliche Leitschaufeln 21s entstehen, die den Drall minimieren und die Strömung der Luft möglichst verlustfrei in axiale Richtung umlenken.The Figures 10 and 11 show views of a further exemplary embodiment of an air guiding arrangement 1. In this embodiment, the guiding plate formation 20 consists of a multiple-edged plate. This is edged in such a way that additional guide vanes 21s are created which minimize the swirl and deflect the flow of the air in the axial direction with as little loss as possible.

In der Fig. 12 ist eine Ausführung ähnlich der Figur 6 gezeigt, allerdings sind die Leitblechformationen 10, 20 aus Lochblechen mit Löchern 14, 24 gebildet. Der dahinter liegende Hohlraum ist mit schalldämmendem Material ausgekleidet, was zu einer erhöhten Schallreduktion führt. Eine solche schalldämmende Maßnahme ist auch mit den weiteren Ausführungen möglich.In the Fig. 12 is a version similar to the Figure 6 shown, but the guide plate formations 10, 20 are formed from perforated plates with holes 14, 24. The cavity behind it is lined with sound-absorbing material, which leads to an increased noise reduction. Such a sound-absorbing measure is also possible with the other versions.

Claims (9)

  1. A ventilation system with a duct shaped housing (30), an air guide assembly (1) arranged in the housing and a radial fan (40) arranged on a cross sectional plane (E) in the housing (30), wherein, on the outflow side behind the radial fan, the air guide assembly (1) comprises at least one guide plate formation (20) with multiple air guide plates (21) oriented differently relative to one another, wherein an air passage duct (2) is formed between the air guide plates (21) of the at least one guide plate formation (20) and the interior (31) of the housing (30), and the air guide plates (21) are arranged so that the effective flow cross section for the air conveyed by the radial fan (40) increases at least partially in flow direction (S) and their setting angle or orientation in flow direction (S) changes in order to achieve a diffuser effect, characterized in that the at least one outflow-side guide plate formation (20) is formed by four double edged air guide plates (21) arranged in pairs, which form at least one triangular plate section (21d), which respectively form a partial segment of a base plate, arranged substantially in the cross-sectional plane (E), of the outflow-side guide plate formation, to which a rectangular plate section (21e), bent for this purpose substantially in axial direction (S), is connected in each case by two side edges (21k), wherein the guide plates (21) are arranged twisted with respect to the axial direction, so that their side edges (21k) are oriented at an angle (φ) of 0° to 20° with respect to the axial direction.
  2. The ventilation system according to claim 1, characterized in that, on the suction side, a guide plate formation (10) consisting of air guide plates (11) oriented relative to one another is additionally arranged.
  3. The ventilation system according to claim 2, characterized in that the suction-side guide plate formation (10) is formed as a substantially funnel-shaped guide plate formation (10) with a square or rectangular cross section.
  4. The ventilation system according to any one of claims 1 to 3, characterized in that the at least one outflow-side guide plate formation (20) is formed as a substantially pyramid- or funnel-shaped guide plate formation (20) with a base (22) with a substantially square or rectangular cross section.
  5. The ventilation system according to claims 1-4, characterized in that the bending angle (β1) of the rectangular plate portions, bent substantially in axial direction (S), of the air guide plates (21), differs with respect to the base (22) for respective immediately adjacent air guide plates (21) and the angular difference is preferably approximately 3° to 10°.
  6. The ventilation system according to the features of claim 2, wherein the suction-side air guide plate formation (10) is arranged at least partially around the radial fan (40), while the at least one outflow-side guide plate formation (20) is arranged on the outflow side behind the radial fan (40).
  7. The ventilation system according to any one of the preceding claims, wherein the ratio of the spacing (Xc) of the base plate of the at least one outflow-side guide plate formation (20) from the radial fan (40) to the diameter (La) of the radial fan (40) is between 0 and 0.8.
  8. The ventilation system according to any one of claims 1 to 7, wherein the guide plates at least of the least one outflow-side guide plate formation (20) are formed by perforated plates with holes (24).
  9. The ventilation system according to any one of claims 1 to 8, wherein a cavity formed in each case behind the guide plates (21) is lined with sound-insulating material in order to thereby bring about a sound and/or noise reduction.
EP18160318.4A 2017-03-07 2018-03-06 Ventilation system with an air guide assembly Active EP3372838B1 (en)

Applications Claiming Priority (1)

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DE102017104779.4A DE102017104779A1 (en) 2017-03-07 2017-03-07 An air guide

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EP3372838A1 EP3372838A1 (en) 2018-09-12
EP3372838B1 true EP3372838B1 (en) 2020-09-16

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DE (2) DE202017101353U1 (en)

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CN207033842U (en) 2018-02-23
EP3372838A1 (en) 2018-09-12
DE102017104779A1 (en) 2018-09-13
DE202017101353U1 (en) 2017-05-09

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