EP2700822A1 - Radial fan casing with pressure tapping duct integrated in the fan inlet - Google Patents

Radial fan casing with pressure tapping duct integrated in the fan inlet Download PDF

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Publication number
EP2700822A1
EP2700822A1 EP12181662.3A EP12181662A EP2700822A1 EP 2700822 A1 EP2700822 A1 EP 2700822A1 EP 12181662 A EP12181662 A EP 12181662A EP 2700822 A1 EP2700822 A1 EP 2700822A1
Authority
EP
European Patent Office
Prior art keywords
fan
wall elements
air inlet
openings
air
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.)
Granted
Application number
EP12181662.3A
Other languages
German (de)
French (fr)
Other versions
EP2700822B1 (en
Inventor
Chris De Jong
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.)
Zehnder Group International AG
Original Assignee
Zehnder Verkaufs und Verwaltungs AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zehnder Verkaufs und Verwaltungs AG filed Critical Zehnder Verkaufs und Verwaltungs AG
Priority to EP12181662.3A priority Critical patent/EP2700822B1/en
Priority to PL12181662T priority patent/PL2700822T3/en
Priority to EA201590435A priority patent/EA039725B1/en
Priority to PCT/IB2013/001841 priority patent/WO2014030055A1/en
Publication of EP2700822A1 publication Critical patent/EP2700822A1/en
Application granted granted Critical
Publication of EP2700822B1 publication Critical patent/EP2700822B1/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
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
    • 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
    • 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
    • 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
    • F05D2270/00—Control
    • F05D2270/30—Control parameters, e.g. input parameters
    • F05D2270/301—Pressure

Definitions

  • the invention relates to a fan with a housing, which has an air inlet, an air outlet and a fan arranged between the air inlet and the air outlet, wherein in the region of the air inlet apertures opening into a flow channel for a pressure measurement are formed.
  • Fans of this type are well known in the art. They usually have a helical housing, in the center of the fan is arranged, wherein the air inlet points in the direction of the axis of rotation of the fan and wherein the air outlet extends in a direction perpendicular to the axis of rotation of the fan.
  • the rotation of the fan impeller draws ambient air between the fan blades and then releases it to the air outlet.
  • the air flow discharged through the air outlet can be regulated depending on the rotational speed of the fan.
  • one or more regions can be arranged in the air inlet, for example, in which an air volume is branched off to measure the pressure. Based on the obtained readings it can be determined if the rotational speed of the fan must be increased or decreased to ensure a uniform pressure within the air inlet.
  • conclusions about the functionality of filters arranged in the air inlet can also be drawn from the measured pressure values.
  • the document shows EP 2 357 365 A2 a fan with a helical housing in which the fan is centrally located, and which has the air inlet in the direction of the axis of rotation of the fan and the air outlet in a direction perpendicular thereto.
  • two areas are provided for branching off air volumes, wherein a first area is arranged as a separate tube in the region of the fan and wherein a second area thereof is arranged at a distance from the flow direction in the air inlet.
  • the hose which forms a ring-shaped placed around the fan pressure measuring range is introduced separately after the manufacture of the fan housing in this. In order for the air to penetrate into the hose, it has holes on its surface. When inserting the hose into the housing, make sure that the holes point exactly radially in the direction of the axis of rotation of the fan.
  • the invention proposes that the air inlet at least partially has two wall elements connected to one another at connection areas and forming a channel volume, at least one partial area of a connection area having openings.
  • the area which serves to branch off air volumes is thus formed by two wall elements which together form a channel volume and provide the required openings at their connection areas.
  • the together forming the channel volume wall elements may be partly made of one or more portions of the fan housing, which are located in the region of the fan, and on the other hand of one or more separate wall elements, which are placed on the corresponding region of the fan housing. Between the two wall elements, i. For example, the partial area of the fan housing and the separate wall element, then creates the channel volume, which leads the air volume required for the air pressure measurement.
  • the separate wall element can be placed on the portion of the fan housing so that a connection region between the separate wall element and the fan housing at least partially has openings through which the air can penetrate into the channel volume formed by the wall elements.
  • the invention further provides that the openings are slit-shaped. This ensures a particularly simple production. It is additionally advantageous that it is not necessary for a guidance of the air within the channel volume to introduce only very small holes in the wall, but that beyond slot-shaped openings are also suitable to introduce a sufficiently large proportion of air in the channel volume and the other to achieve a satisfactory guidance of the air within the channel volume.
  • the slot-shaped configuration is particularly advantageous in the sense of the invention, since the slot shape can be achieved particularly easily by spacing the adjacent wall elements within the connection areas. Thus eliminates the additional step of introducing openings in the material of the wall elements. Alternatively or additionally, of course, round or cylindrical openings can also be formed.
  • the openings have a dimension smaller than 2 mm in at least one direction. On the one hand, this quantity is sufficient to introduce a sufficiently large amount of air into the channel volume and, on the other hand, small enough to reduce the losses.
  • the invention has surprisingly shown that even long, slot-shaped openings which are smaller than 2 mm in one direction, the volume of air as lossless as possible in the channel volume.
  • the invention provides that webs are formed between the openings.
  • a plurality of such webs are arranged along a connecting region, which set a distance of less than 2 mm between the adjacent wall elements.
  • the webs can advantageously produce the connection between the adjacent wall elements.
  • the channel volume formed by the wall elements is substantially annular.
  • the region intended for branching off compressed air can be arranged as a continuous ring around the fan. But it can also be deviated from an ideal round shape, for example, to integrate a control board with pressure sensors.
  • channel volume forming wall elements made of plastic. This makes it possible to produce the wall elements, as well as the fan housing, by injection molding, which in turn allows a particularly simple and cost-effective production.
  • a seal is arranged on at least one connection area.
  • the seal may be glued, clamped or otherwise connected to the wall elements and / or the fan housing as known in the art.
  • the wall elements are adhesively bonded, welded and / or screwed to the connection regions.
  • the wall elements are adhesively bonded, welded and / or screwed to the connection regions.
  • the invention also proposes a method for producing a fan with a housing, wherein the housing has an air inlet, an air outlet and a fan arranged between the air inlet and the air outlet, openings opening in the region of the air inlet into a flow channel for pressure measurement are formed, wherein at least partially two wall elements of the air inlet at connection areas are connected to each other so that they enclose a channel volume, wherein at least a portion of a connection region after connection has openings.
  • the method according to the invention therefore proposes connecting the wall elements to one another via connecting regions in such a way that, on the one hand, they enclose a channel volume and, on the other hand, are connected to one another so that openings for the passage of the air remain.
  • the wall elements are connected to one another in a connection region via webs which serve as spacers and ensure a slot-shaped opening between the adjacent wall elements.
  • a fan 1 is shown with a housing 2, wherein the housing 2 includes an air inlet 3 and an air outlet 4.
  • a fan 5 is arranged, which conveys air flowing into the air inlet 3 via its fan blades in the air outlet 4.
  • an area 6 and a second pressure measuring area are arranged.
  • Fig. 2 shows a trained in the region 6 channel volume 8, which is enclosed by two adjacent wall elements 9.
  • the two wall elements 9 are connected to each other via connecting regions 7.
  • a web 11 is arranged which spaces the wall elements 9 from one another. In addition to the web 11 thereby creates an opening 10.
  • the two wall elements 9 are connected via a screw 12 to each other.
  • the fan 1 according to Fig. 1 works so that ambient air is conveyed into the air inlet 3 of the housing 2.
  • the air conveying takes over a arranged in the housing 2 fan 5.
  • the fan 5 then conveys the ambient air from the air inlet 3 in the air outlet 4.
  • wall elements 9 according to the invention are arranged in the area, which enclose a channel volume 8.
  • the air present in the air inlet 3 reaches the area 6 Fig. 2 two wall elements 9 arranged to each other so that they enclose the channel volume 8.
  • the two wall elements 9 are screwed together by means of a screw 12.
  • the wall element 9 shown in the figure below can be attached to a part of the housing 2 of the fan 1.
  • the housing 2 itself can form a wall element 9.
  • a web 11 is arranged, which forms the openings 10 next to it.
  • These openings 10 are slot-shaped and can extend along the entire connecting region 7 between the wall elements 9.
  • webs 11 may be provided at regular intervals over the length of the connecting region 7.
  • the size of the openings 10 is in the direction perpendicular to the cutting edge of the wall elements 9 less than 2 mm. In contrast to the cutting edge of the wall elements 9, the openings 10 may be formed as long as desired.
  • the second connection area 7 in Fig. 2 shown on the right is the upper wall element 9 positively placed against a projection of the lower wall element 9. It can additionally be provided that this connection region 7 has a seal which prevents the escape of air at this point.
  • Wall elements 9 shown can be formed annularly within the entire opening of the air inlet 3, for example, so that they surround the fan 5.
  • a connection between the wall elements 9 and the housing 2 of the fan 1 can be done via a screw, a plug connection or welding, gluing, etc.
  • plastic in particular offers itself as a material, since this can be easily molded by injection molding.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

The fan has a housing portion (2) provided with an air inlet and an air outlet. A ventilator is arranged between the air inlet and the air outlet. Several apertures (10) extending into a flow channel for pressure measurement are formed in a specific region of the air inlet. Two wall elements (9) of the air inlet are interconnected at connection regions (7) for enclosing a channel volume portion (8). A portion of the connecting region is provided with apertures. An independent claim is included for a method for manufacturing fan.

Description

Die Erfindung betrifft einen Lüfter mit einem Gehäuse, welches einen Lufteinlass, einen Luftauslass und einen zwischen Lufteinlass und Luftauslass angeordneten Ventilator aufweist, wobei im Bereich des Lufteinlasses in einen Strömungskanal für eine Druckmessung mündende Öffnungen ausgebildet sind.The invention relates to a fan with a housing, which has an air inlet, an air outlet and a fan arranged between the air inlet and the air outlet, wherein in the region of the air inlet apertures opening into a flow channel for a pressure measurement are formed.

Lüfter dieser Art sind im Stand der Technik hinreichend bekannt. Sie verfügen zumeist über ein schneckenförmiges Gehäuse, in dessen Zentrum der Ventilator angeordnet ist, wobei der Lufteinlass in Richtung der Drehachse des Ventilators weist und wobei der Luftauslass in eine Richtung senkrecht zur Drehachse des Ventilators verläuft. Durch die Rotation des Ventilator-Laufrades wird Umgebungsluft zwischen die Ventilatorblätter gesaugt und anschließend an den Luftauslass abgegeben. Der durch den Luftauslass abgegebene Luftstrom kann dabei abhängig von der Drehgeschwindigkeit des Ventilators reguliert werden. Um einen optimalen Betrieb des Ventilators und damit auch des Lüfters sicherzustellen, können im Lufteinlass beispielsweise ein oder mehrere Bereiche angeordnet sein, in welchen ein Luftvolumen zur Messung des Drucks abgezweigt wird. Anhand der erlangten Messwerte kann festgestellt werden, ob die Rotationsgeschwindigkeit des Ventilators erhöht oder verringert werden muss, um einen gleichmäßigen Druck innerhalb des Lufteinlasses sicherzustellen. Darüber hinaus können aus den gemessenen Druckwerten ebenso Rückschlüsse auf die Funktionsfähigkeit von in dem Lufteinlass angeordneten Filtern gezogen werden.Fans of this type are well known in the art. They usually have a helical housing, in the center of the fan is arranged, wherein the air inlet points in the direction of the axis of rotation of the fan and wherein the air outlet extends in a direction perpendicular to the axis of rotation of the fan. The rotation of the fan impeller draws ambient air between the fan blades and then releases it to the air outlet. The air flow discharged through the air outlet can be regulated depending on the rotational speed of the fan. In order to ensure optimum operation of the fan and thus also of the fan, one or more regions can be arranged in the air inlet, for example, in which an air volume is branched off to measure the pressure. Based on the obtained readings it can be determined if the rotational speed of the fan must be increased or decreased to ensure a uniform pressure within the air inlet. In addition, conclusions about the functionality of filters arranged in the air inlet can also be drawn from the measured pressure values.

Beispielsweise zeigt die Druckschrift EP 2 357 365 A2 einen Lüfter mit einem schneckenförmigen Gehäuse, in welchem zentral der Ventilator angeordnet ist, und welches in Richtung der Drehachse des Ventilators den Lufteinlass und in eine Richtung senkrecht dazu den Luftauslass aufweist. Zur Messung der Druckverhältnisse innerhalb des Lufteinlasses sind zwei Bereiche zur Abzweigung von Luftvolumen vorgesehen, wobei ein erster Bereich als separater Schlauch im Bereich des Ventilators angeordnet ist und wobei ein zweiter Bereich davon gegen die Strömungsrichtung beabstandet im Lufteinlass angeordnet ist. Der Schlauch, welcher einen ringförmig um den Ventilator gelegten Druckmessbereich ausbildet, wird nach Herstellung des Lüftergehäuses separat in dieses eingebracht. Damit die Luft dabei in den Schlauch eindringen kann, verfügt dieser an seiner Oberfläche über Löcher. Beim Einbringen des Schlauches in das Gehäuse ist darauf zu achten, dass die Löcher jeweils exakt radial in Richtung der Drehachse des Ventilators weisen.For example, the document shows EP 2 357 365 A2 a fan with a helical housing in which the fan is centrally located, and which has the air inlet in the direction of the axis of rotation of the fan and the air outlet in a direction perpendicular thereto. For measuring the pressure conditions within the air inlet, two areas are provided for branching off air volumes, wherein a first area is arranged as a separate tube in the region of the fan and wherein a second area thereof is arranged at a distance from the flow direction in the air inlet. The hose, which forms a ring-shaped placed around the fan pressure measuring range is introduced separately after the manufacture of the fan housing in this. In order for the air to penetrate into the hose, it has holes on its surface. When inserting the hose into the housing, make sure that the holes point exactly radially in the direction of the axis of rotation of the fan.

Probleme bei diesem Stand der Technik entstehen dadurch, dass die exakte Ausrichtung der in den Schlauch eingebrachten Löcher besonderes Geschick erfordert. Ebenso ist es nachteilig, dass der Schlauch erst nach der Herstellung des Gehäuses in das Gehäuse eingebracht wird, wodurch ein zusätzlicher Arbeitsschritt erforderlich ist. Ebenso ergeben sich Nachteile durch eine Verschmutzung der im Schlauch angeordneten Löcher aufgrund im Luftstrom vorhandener Schmutzpartikel.Problems with this prior art arise from the fact that the exact alignment of the holes introduced into the hose requires special skill. It is also disadvantageous that the tube is introduced into the housing only after the manufacture of the housing, whereby an additional step is required. Likewise, disadvantages result from contamination of the holes arranged in the hose due to dirt particles present in the air stream.

Daher ist es Aufgabe der Erfindung, einen Lüfter gemäß dem Oberbegriff des Anspruchs 1 zu schaffen, welcher besonders einfach herzustellen ist, dadurch einen nur geringen Arbeitsaufwand bei der Fertigung erfordert und zudem ein geringeres Risiko der Verschmutzung beinhaltet.Therefore, it is an object of the invention to provide a fan according to the preamble of claim 1, which is particularly easy to manufacture, thereby requiring only a small amount of work in the production and also includes a lower risk of contamination.

Zur Lösung dieser Aufgabe schlägt die Erfindung vor, dass der Lufteinlass wenigstens teilweise zwei miteinander an Verbindungsbereichen verbundene, zusammen ein Kanalvolumen ausbildende Wandelemente aufweist, wobei wenigstens ein Teilbereich eines Verbindungsbereiches Öffnungen aufweist.To achieve this object, the invention proposes that the air inlet at least partially has two wall elements connected to one another at connection areas and forming a channel volume, at least one partial area of a connection area having openings.

Durch die erfindungsgemäße Ausbildung wird somit der Bereich, welcher zur Abzweigung von Luftvolumen dient, durch zwei Wandelemente ausgebildet, die zusammen ein Kanalvolumen ausbilden und an ihren Verbindungsbereichen die benötigten Öffnungen bereitstellen. Dadurch entfällt die separate Einbringung von Öffnungen in die Wandelemente selbst. Somit wird zum einen der Arbeitsschritt des Einbringens von Löchern in die Wandelemente gespart und zum anderen die exakte radiale Ausrichtung der Löcher. Dadurch nämlich, dass die Öffnungen inhärent beim Verbinden der Wandelemente positioniert werden, entfällt die arbeitsaufwändige Ausrichtung.As a result of the construction according to the invention, the area which serves to branch off air volumes is thus formed by two wall elements which together form a channel volume and provide the required openings at their connection areas. This eliminates the separate introduction of openings in the wall elements themselves. Thus, on the one hand saves the operation of introducing holes in the wall elements and on the other the exact radial orientation the holes. This, namely that the openings are inherently positioned when connecting the wall elements eliminates the laborious alignment.

Die zusammen das Kanalvolumen ausbildenden Wandelemente können dabei zum einen teilweise aus einem oder mehreren Teilbereichen des Lüftergehäuses bestehen, welche sich im Bereich des Ventilators befinden, und zum anderen aus einem oder mehreren separaten Wandelementen, welche auf den entsprechenden Bereich des Lüftergehäuses aufgesetzt werden. Zwischen den beiden Wandelementen, d.h. beispielsweise dem Teilbereich des Lüftergehäuses und dem separaten Wandelement, entsteht dann das Kanalvolumen, welches das für die Luftdruckmessung benötigte Luftvolumen führt. Das separate Wandelement kann dabei so auf den Teilbereich des Lüftergehäuses aufgesetzt werden, dass ein Verbindungsbereich zwischen dem separaten Wandelement und dem Lüftergehäuse zumindest teilweise Öffnungen aufweist, durch welche die Luft in das von den Wandelementen ausgebildete Kanalvolumen eindringen kann. Die Erfindung ermöglicht somit eine Herstellung des Lüfters in Modulbauweise, wobei das Kanalvolumen besonders einfach aus zwei oder mehr Wandelementen ausgebildet sein kann, wobei gemäß einer besonders einfachen Ausgestaltung eines der Wandelemente ein Teilbereich des Lüftergehäuses ist.The together forming the channel volume wall elements may be partly made of one or more portions of the fan housing, which are located in the region of the fan, and on the other hand of one or more separate wall elements, which are placed on the corresponding region of the fan housing. Between the two wall elements, i. For example, the partial area of the fan housing and the separate wall element, then creates the channel volume, which leads the air volume required for the air pressure measurement. The separate wall element can be placed on the portion of the fan housing so that a connection region between the separate wall element and the fan housing at least partially has openings through which the air can penetrate into the channel volume formed by the wall elements. The invention thus enables a manufacturing of the fan in modular design, wherein the channel volume can be particularly easily formed of two or more wall elements, wherein according to a particularly simple embodiment of the wall elements is a portion of the fan housing.

Die Erfindung sieht weiterhin vor, dass die Öffnungen schlitzförmig ausgebildet sind. Dadurch ist eine besonders einfache Herstellung gewährleistet. Zusätzlich vorteilhaft ist dabei, dass es für eine Führung der Luft innerhalb des Kanalvolumens nicht erforderlich ist, ausschließlich besonders kleine Löcher in die Wandung einzubringen, sondern dass darüber hinaus auch schlitzförmige Öffnungen geeignet sind, zum einen einen ausreichend großen Luftanteil in das Kanalvolumen einzuleiten und zum anderen eine zufriedenstellende Führung der Luft innerhalb des Kanalvolumens zu erreichen. Die schlitzförmige Ausgestaltung bietet sich im Sinne der Erfindung besonders vorteilhaft an, da die Schlitzform besonders leicht durch eine Beabstandung der benachbarten Wandelemente innerhalb der Verbindungsbereiche erreicht werden kann. Somit entfällt der zusätzliche Arbeitsschritt der Einbringung von Öffnungen in das Material der Wandelemente. Alternativ oder zusätzlich können aber selbstverständlich auch runde oder zylindrische Öffnungen ausgebildet werden.The invention further provides that the openings are slit-shaped. This ensures a particularly simple production. It is additionally advantageous that it is not necessary for a guidance of the air within the channel volume to introduce only very small holes in the wall, but that beyond slot-shaped openings are also suitable to introduce a sufficiently large proportion of air in the channel volume and the other to achieve a satisfactory guidance of the air within the channel volume. The slot-shaped configuration is particularly advantageous in the sense of the invention, since the slot shape can be achieved particularly easily by spacing the adjacent wall elements within the connection areas. Thus eliminates the additional step of introducing openings in the material of the wall elements. Alternatively or additionally, of course, round or cylindrical openings can also be formed.

Es ist vorgesehen, dass die Längserstreckung der schlitzförmigen Öffnungen parallel zu den Schnittkanten der Wandelemente ist. Dadurch sind die Öffnungen unmittelbar in ein und derselben Ebene angeordnet. Ein aufwändiges Ausrichten jeder einzelnen Öffnung gegenüber der Drehachse des Ventilators ist daher nicht erforderlich.It is envisaged that the longitudinal extension of the slot-shaped openings is parallel to the cut edges of the wall elements. As a result, the openings are directly in one and the same level. A complex alignment of each opening with respect to the rotational axis of the fan is therefore not required.

Es empfiehlt sich weiterhin, dass die Öffnungen in zumindest einer Richtung eine Abmessung kleiner als 2 mm aufweisen. Diese Größe ist zum einen ausreichend, um eine ausreichend große Luftmenge in das Kanalvolumen einzubringen, und zum anderen klein genug, um die Verluste zu reduzieren. Dabei hat die Erfindung überraschend gezeigt, dass auch lange, schlitzförmige Öffnungen, welche in einer Richtung kleiner als 2 mm sind, das Luftvolumen möglichst verlustfrei in dem Kanalvolumen zu führen vermögen.It is further recommended that the openings have a dimension smaller than 2 mm in at least one direction. On the one hand, this quantity is sufficient to introduce a sufficiently large amount of air into the channel volume and, on the other hand, small enough to reduce the losses. The invention has surprisingly shown that even long, slot-shaped openings which are smaller than 2 mm in one direction, the volume of air as lossless as possible in the channel volume.

Weiterhin sieht die Erfindung vor, dass zwischen den Öffnungen Stege ausgebildet sind. Im Falle der Ausbildung von schlitzförmigen Öffnungen lässt sich so eine erhöhte Stabilität der Wandelemente erreichen. Dabei kann beispielsweise vorgesehen sein, dass entlang eines Verbindungsbereiches mehrere solcher Stege angeordnet sind, welche zwischen den benachbarten Wandelementen einen Abstand von weniger als 2 mm einstellen. Die Stege können dabei vorteilhaft die Verbindung zwischen den benachbarten Wandelementen herstellen.Furthermore, the invention provides that webs are formed between the openings. In the case of the formation of slot-shaped openings can thus achieve increased stability of the wall elements. In this case, it can be provided, for example, that a plurality of such webs are arranged along a connecting region, which set a distance of less than 2 mm between the adjacent wall elements. The webs can advantageously produce the connection between the adjacent wall elements.

Es ist weiterhin vorgesehen, dass das von den Wandelementen ausgebildete Kanalvolumen im Wesentlichen ringförmig ist. Dadurch lässt sich der zur Abzweigung von Druckluft bestimmte Bereich als kontinuierlicher Ring um den Ventilator herum anordnen. Es kann aber auch von einer ideal runden Form abgewichen werden, um beispielsweise eine Steuerplatine mit Drucksensoren zu integrieren.It is further provided that the channel volume formed by the wall elements is substantially annular. As a result, the region intended for branching off compressed air can be arranged as a continuous ring around the fan. But it can also be deviated from an ideal round shape, for example, to integrate a control board with pressure sensors.

Besonders vorteilhaft sind die das Kanalvolumen ausbildenden Wandelemente aus Kunststoff. Damit wird es möglich, die Wandelemente, wie auch das Lüftergehäuse, im Spritzgussverfahren herzustellen, was wiederum eine besonders einfache und kostengünstige Herstellung ermöglicht.Particularly advantageous are the channel volume forming wall elements made of plastic. This makes it possible to produce the wall elements, as well as the fan housing, by injection molding, which in turn allows a particularly simple and cost-effective production.

Es empfiehlt sich weiterhin, dass an zumindest einem Verbindungsbereich eine Dichtung angeordnet ist. Somit kann zumindest an dem Verbindungsbereich, welcher keine Öffnungen aufweist, der Verlust von Luftvolumen vermieden werden. Die Dichtung kann dabei wie im Stand der Technik bekannt geklebt, geklemmt oder sonst wie mit den Wandelementen und/oder dem Lüftergehäuse verbunden sein.It is further recommended that a seal is arranged on at least one connection area. Thus, at least at the connection area, which has no openings, the loss of air volume can be avoided. The seal may be glued, clamped or otherwise connected to the wall elements and / or the fan housing as known in the art.

Ebenso ist vorgesehen, dass die Wandelemente an den Verbindungsbereichen verklebt, verschweißt und/oder verschraubt sind. Somit können nahezu alle üblichen Befestigungsmöglichkeiten im Sinne der vorliegenden Erfindung verwendet werden.It is likewise provided that the wall elements are adhesively bonded, welded and / or screwed to the connection regions. Thus, almost all conventional mounting options can be used in the context of the present invention.

Neben dem erfindungsgemäßen Lüfter schlägt die Erfindung weiterhin ein Verfahren zur Herstellung eines Lüfters mit einem Gehäuse vor, wobei das Gehäuse einen Lufteinlass, einen Luftauslass und einen zwischen Lufteinlass und Luftauslass angeordneten Ventilator aufweist, wobei im Bereich des Lufteinlasses in einen Strömungskanal für eine Druckmessung mündende Öffnungen ausgebildet sind, wobei wenigstens teilweise zwei Wandelemente des Lufteinlasses an Verbindungsbereichen so miteinander verbunden werden, dass sie ein Kanalvolumen umschließen, wobei wenigstens ein Teilbereich eines Verbindungsbereiches nach Verbindungsherstellung Öffnungen aufweist.In addition to the fan according to the invention, the invention also proposes a method for producing a fan with a housing, wherein the housing has an air inlet, an air outlet and a fan arranged between the air inlet and the air outlet, openings opening in the region of the air inlet into a flow channel for pressure measurement are formed, wherein at least partially two wall elements of the air inlet at connection areas are connected to each other so that they enclose a channel volume, wherein at least a portion of a connection region after connection has openings.

Das erfindungsgemäße Verfahren schlägt somit vor, die Wandelemente über Verbindungsbereiche so miteinander zu verbinden, dass sie zum einen ein Kanalvolumen umschließen und zum anderen so miteinander verbunden sind, dass Öffnungen für den Durchtritt der Luft verbleiben. Dabei kann insbesondere vorgesehen sein, dass die Wandelemente in einem Verbindungsbereich über Stege miteinander verbunden werden, welche als Abstandhalter dienen und eine schlitzförmige Öffnung zwischen den benachbarten Wandelementen sicherstellen.The method according to the invention therefore proposes connecting the wall elements to one another via connecting regions in such a way that, on the one hand, they enclose a channel volume and, on the other hand, are connected to one another so that openings for the passage of the air remain. In this case, it can be provided, in particular, that the wall elements are connected to one another in a connection region via webs which serve as spacers and ensure a slot-shaped opening between the adjacent wall elements.

Im Folgenden wird die Erfindung anhand eines Ausführungsbeispiels näher erläutert.In the following the invention will be explained in more detail with reference to an embodiment.

Es zeigen:

Fig. 1
einen Lüfter in einer Seitenansicht
Fig. 2
zwei ein Kanalvolumen ausbildende Wandelemente in einer Schnittdarstellung.
Show it:
Fig. 1
a fan in a side view
Fig. 2
two a channel volume forming wall elements in a sectional view.

In Fig. 1 ist ein Lüfter 1 mit einem Gehäuse 2 dargestellt, wobei das Gehäuse 2 einen Lufteinlass 3 und einen Luftauslass 4 beinhaltet. Innerhalb des Gehäuses 2 ist ein Ventilator 5 angeordnet, welcher in den Lufteinlass 3 einströmende Luft über seine Ventilatorblätter in den Luftauslass 4 befördert. Innerhalb des Lufteinlasses 3 ist ein Bereich 6 und ein zweiter Druckmessbereich (in der Figur nicht dargestellt) angeordnet.In Fig. 1 a fan 1 is shown with a housing 2, wherein the housing 2 includes an air inlet 3 and an air outlet 4. Within the housing 2, a fan 5 is arranged, which conveys air flowing into the air inlet 3 via its fan blades in the air outlet 4. Within the air inlet 3, an area 6 and a second pressure measuring area (not shown in the figure) are arranged.

Fig. 2 zeigt ein im Bereich 6 ausgebildetes Kanalvolumen 8, welches durch zwei benachbarte Wandelemente 9 umschlossen ist. Die beiden Wandelemente 9 sind dabei über Verbindungsbereiche 7 miteinander verbunden. In einem der Verbindungsbereiche 7 (in der Figur links dargestellt) ist ein Steg 11 angeordnet, welcher die Wandelemente 9 zueinander beabstandet. Neben dem Steg 11 entsteht dadurch eine Öffnung 10. Die beiden Wandelemente 9 sind über eine Schraube 12 miteinander verbunden. Fig. 2 shows a trained in the region 6 channel volume 8, which is enclosed by two adjacent wall elements 9. The two wall elements 9 are connected to each other via connecting regions 7. In one of the connecting regions 7 (shown on the left in the figure), a web 11 is arranged which spaces the wall elements 9 from one another. In addition to the web 11 thereby creates an opening 10. The two wall elements 9 are connected via a screw 12 to each other.

Der Lüfter 1 gemäß Fig. 1 funktioniert so, dass Umgebungsluft in den Lufteinlass 3 des Gehäuses 2 gefördert wird. Die Luftförderung übernimmt dabei ein in dem Gehäuse 2 angeordneter Ventilator 5. Der Ventilator 5 fördert die Umgebungsluft sodann von dem Lufteinlass 3 in den Luftauslass 4. Um den Druck innerhalb des Lufteinlasses 3 bestimmen zu können, sind in dem Bereich 6 erfindungsgemäße Wandelemente 9 angeordnet, welche ein Kanalvolumen 8 umschließen.The fan 1 according to Fig. 1 works so that ambient air is conveyed into the air inlet 3 of the housing 2. The air conveying takes over a arranged in the housing 2 fan 5. The fan 5 then conveys the ambient air from the air inlet 3 in the air outlet 4. In order to determine the pressure within the air inlet 3, wall elements 9 according to the invention are arranged in the area, which enclose a channel volume 8.

Während des Betriebes des Ventilators 5 gelangt die im Lufteinlass 3 vorhandene Luft in den Bereich 6. Im Bereich 6 sind gemäß Fig. 2 zwei Wandelemente 9 so zueinander angeordnet, dass sie das Kanalvolumen 8 umschließen. Die beiden Wandelemente 9 sind dabei mittels einer Schraube 12 miteinander verschraubt. Das in der Figur unten dargestellte Wandelement 9 kann dabei auf einen Teil des Gehäuses 2 des Lüfters 1 aufgesteckt sein. Ebenso kann aber auch das Gehäuse 2 selbst ein Wandelement 9 bilden. In dem zwischen den beiden Wandelementen 9 ausgebildeten Verbindungsbereich 7 (links in Figur 2) ist ein Steg 11 angeordnet, welcher neben sich die Öffnungen 10 ausbildet. Diese Öffnungen 10 sind schlitzförmig ausgebildet und können sich längs des gesamten Verbindungsbereiches 7 zwischen den Wandelementen 9 erstrecken. Ebenso können Stege 11 in regelmäßigen Abständen über die Länge des Verbindungsbereiches 7 vorgesehen sein. Dadurch wird im Sinne von Abstandshaltern eine gleichmäßige Öffnungsgröße sicherstellt. Die Größe der Öffnungen 10 beträgt dabei in der Richtung senkrecht zur Schnittkante der Wandelemente 9 weniger als 2 mm. Parallel zur Schnittkante der Wandelemente 9 können die Öffnungen 10 dagegen beliebig lang ausgebildet sein. Im zweiten Verbindungsbereich 7 (in Fig. 2 rechts dargestellt) ist das obere Wandelement 9 formschlüssig gegen einen Vorsprung des unteren Wandelementes 9 gelegt. Dabei kann zusätzlich vorgesehen sein, dass dieser Verbindungsbereich 7 eine Dichtung aufweist, die das Austreten von Luft an dieser Stelle verhindert.During operation of the fan 5, the air present in the air inlet 3 reaches the area 6 Fig. 2 two wall elements 9 arranged to each other so that they enclose the channel volume 8. The two wall elements 9 are screwed together by means of a screw 12. The wall element 9 shown in the figure below can be attached to a part of the housing 2 of the fan 1. Likewise, however, the housing 2 itself can form a wall element 9. In the formed between the two wall elements 9 connecting region 7 (left in FIG. 2 ), a web 11 is arranged, which forms the openings 10 next to it. These openings 10 are slot-shaped and can extend along the entire connecting region 7 between the wall elements 9. Likewise, webs 11 may be provided at regular intervals over the length of the connecting region 7. As a result, a uniform opening size is ensured in the sense of spacers. The size of the openings 10 is in the direction perpendicular to the cutting edge of the wall elements 9 less than 2 mm. In contrast to the cutting edge of the wall elements 9, the openings 10 may be formed as long as desired. In the second connection area 7 (in Fig. 2 shown on the right) is the upper wall element 9 positively placed against a projection of the lower wall element 9. It can additionally be provided that this connection region 7 has a seal which prevents the escape of air at this point.

Die in Fig. 2 dargestellten Wandelemente 9 können dabei ringförmig innerhalb der gesamten Öffnung des Lufteinlasses 3 ausgebildet sein, beispielsweise so, dass sie den Ventilator 5 umgeben. Eine Verbindung zwischen den Wandelementen 9 und dem Gehäuse 2 des Lüfters 1 kann über eine Schraubverbindung, eine Steckverbindung oder auch Schweißen, Kleben etc. erfolgen. Zur Herstellung der Wandelemente 9 bietet sich insbesondere Kunststoff als Werkstoff an, da dieser leicht im Spritzgussverfahren geformt werden kann.In the Fig. 2 Wall elements 9 shown can be formed annularly within the entire opening of the air inlet 3, for example, so that they surround the fan 5. A connection between the wall elements 9 and the housing 2 of the fan 1 can be done via a screw, a plug connection or welding, gluing, etc. For the production of the wall elements 9, plastic in particular offers itself as a material, since this can be easily molded by injection molding.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
LüfterFan
22
Gehäusecasing
33
Lufteinlassair intake
44
Luftauslassair outlet
55
Ventilatorfan
66
BereichArea
77
Verbindungsbereichconnecting area
88th
Kanalvolumenchannel volume
99
Wandelementwall element
1010
Öffnungopening
1111
Stegweb
1212
Schraubescrew

Claims (15)

Lüfter (1) mit einem Gehäuse (2), welches einen Lufteinlass (3), einen Luftauslass (4) und einen zwischen Lufteinlass (3) und Luftauslass (4) angeordneten Ventilator (5) aufweist, wobei im Bereich des Lufteinlasses (3) in einen Strömungskanal für eine Druckmessung mündende Öffnungen (10) ausgebildet sind,
dadurch gekennzeichnet,
dass der Lufteinlass (3) wenigstens teilweise zwei miteinander an Verbindungsbereichen (7) verbundene, zusammen ein Kanalvolumen (8) ausbildende Wandelemente (9) aufweist, wobei wenigstens ein Teilbereich eines Verbindungsbereiches (7) Öffnungen (10) aufweist.Fan (1) having a housing (2) which has an air inlet (3), an air outlet (4) and a fan (5) arranged between the air inlet (3) and air outlet (4), wherein in the area of the air inlet (3) formed in a flow channel for pressure measurement opening openings (10),
characterized,
in that the air inlet (3) at least partially has two wall elements (9) connected together at connecting areas (7) and forming a channel volume (8), wherein at least a partial area of a connecting area (7) has openings (10). Lüfter (1) nach Anspruch 1, dadurch gekennzeichnet, dass ein Wandelement (9) ein Teilbereich des Gehäuses (2) des Lüfters (1) ist.Fan (1) according to claim 1, characterized in that a wall element (9) is a partial region of the housing (2) of the fan (1). Lüfter (1) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Öffnungen (10) schlitzförmig ausgebildet sind.Fan (1) according to claim 1 or 2, characterized in that the openings (10) are slot-shaped. Lüfter (1) nach Anspruch 3, dadurch gekennzeichnet, dass die Längserstreckung der schlitzförmigen Öffnungen (10) parallel zu den Schnittkanten der Wandelemente (9) ist.Fan (1) according to claim 3, characterized in that the longitudinal extent of the slot-shaped openings (10) is parallel to the cut edges of the wall elements (9). Lüfter (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Öffnungen (10) in zumindest einer Richtung eine Abmessung kleiner als 2 mm aufweisen.Fan (1) according to one of the preceding claims, characterized in that the openings (10) have a dimension smaller than 2 mm in at least one direction. Lüfter (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass zwischen den Öffnungen (10) Stege (11) ausgebildet sind.Fan (1) according to one of the preceding claims, characterized in that between the openings (10) webs (11) are formed. Lüfter (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das von den Wandelementen (9) ausgebildete Kanalvolumen (8) im Wesentlichen ringförmig ist.Fan (1) according to one of the preceding claims, characterized in that the channel volume (8) formed by the wall elements (9) is substantially annular. Lüfter (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die das Kanalvolumen (8) ausbildenden Wandelementen (9) aus Kunststoff sind.Fan (1) according to one of the preceding claims, characterized in that the channel volume (8) forming wall elements (9) are made of plastic. Lüfter (1) nach Anspruch 8, dadurch gekennzeichnet, dass die Wandelemente (9) Spritzgussteile sind.Fan (1) according to claim 8, characterized in that the wall elements (9) are injection-molded parts. Lüfter (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass an zumindest einem Verbindungsbereich (7) eine Dichtung angeordnet ist.Fan (1) according to one of the preceding claims, characterized in that a seal is arranged on at least one connecting region (7). Lüfter (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Wandelemente (9) an den Verbindungsbereichen (7) verklebt, verschweißt und/oder verschraubt sind.Fan (1) according to one of the preceding claims, characterized in that the wall elements (9) are glued, welded and / or screwed to the connecting regions (7). Verfahren zur Herstellung eines Lüfters (1) mit einem Gehäuse (2), welches einen Lufteinlass (3), einen Luftauslass (4) und einen zwischen Lufteinlass (3) und Luftauslass (4) angeordneten Ventilator (5) aufweist, wobei im Bereich des Lufteinlasses (3) in einen Strömungskanal für eine Druckmessung mündende Öffnungen (10) ausgebildet sind,
dadurch gekennzeichnet,
dass wenigstens teilweise zwei Wandelemente (9) des Lufteinlasses (3) an Verbindungsbereichen (7) so miteinander verbunden werden, dass sie ein Kanalvolumen (8) umschließen, wobei wenigstens ein Teilbereich eines Verbindungsbereiches (7) nach Verbindungsherstellung Öffnungen (10) aufweist.Method for producing a ventilator (1) having a housing (2) which has an air inlet (3), an air outlet (4) and a ventilator (5) arranged between the air inlet (3) and the air outlet (4), wherein in the region of Air inlet (3) in a flow channel for pressure measurement opening openings (10) are formed,
characterized,
in that at least partially two wall elements (9) of the air inlet (3) are joined together at connecting regions (7) in such a way that they surround a channel volume (8), wherein at least a partial region of a connecting region (7) has openings (10) after the connection has been established. Verfahren nach Anspruch 12, dadurch gekennzeichnet, dass die Wandelemente (9) über Stege (11) miteinander verbunden werden.A method according to claim 12, characterized in that the wall elements (9) via webs (11) are interconnected. Verfahren nach Anspruch 12 oder 13, dadurch gekennzeichnet, dass an den Verbindungsbereichen (7) eine Dichtung angeordnet wird.A method according to claim 12 or 13, characterized in that at the connecting regions (7) a seal is arranged. Verfahren nach einem der Ansprüche 12 bis 14, dadurch gekennzeichnet, dass die Wandelemente (9) an den Verbindungsbereichen (7) verklebt, verschweißt und/oder verschraubt werden.Method according to one of claims 12 to 14, characterized in that the wall elements (9) are glued to the connecting regions (7), welded and / or screwed.
EP12181662.3A 2012-08-24 2012-08-24 Radial fan casing with pressure tapping duct integrated in the fan inlet Active EP2700822B1 (en)

Priority Applications (4)

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EP12181662.3A EP2700822B1 (en) 2012-08-24 2012-08-24 Radial fan casing with pressure tapping duct integrated in the fan inlet
PL12181662T PL2700822T3 (en) 2012-08-24 2012-08-24 Radial fan casing with pressure tapping duct integrated in the fan inlet
EA201590435A EA039725B1 (en) 2012-08-24 2013-08-26 Housing for a radial fan with a pressure measurement channel integrated in the fan inlet
PCT/IB2013/001841 WO2014030055A1 (en) 2012-08-24 2013-08-26 Housing for a radial fan with a pressure measurement channel integrated in the fan inlet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12181662.3A EP2700822B1 (en) 2012-08-24 2012-08-24 Radial fan casing with pressure tapping duct integrated in the fan inlet

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EA (1) EA039725B1 (en)
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Cited By (1)

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Publication number Priority date Publication date Assignee Title
EP3048430A1 (en) * 2015-01-22 2016-07-27 Viessmann Werke GmbH & Co. KG Ventilator with pressure measurement point

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017120652A1 (en) 2017-09-07 2019-03-07 Ebm-Papst Mulfingen Gmbh & Co. Kg Fan with integrated flow control

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US20100189547A1 (en) * 2006-11-02 2010-07-29 Panasonic Corporation Centrifugal Fan
EP2357365A2 (en) 2010-02-01 2011-08-17 Brink Climate Systems B.V. Air movement system
US20110250051A1 (en) * 2010-04-09 2011-10-13 Trane International Inc. FC fan flow measurement system

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DE19629220B4 (en) * 1996-07-19 2005-05-12 Motoren Ventilatoren Landshut Gmbh High Pressure Blower

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Publication number Priority date Publication date Assignee Title
US20100189547A1 (en) * 2006-11-02 2010-07-29 Panasonic Corporation Centrifugal Fan
EP2357365A2 (en) 2010-02-01 2011-08-17 Brink Climate Systems B.V. Air movement system
US20110250051A1 (en) * 2010-04-09 2011-10-13 Trane International Inc. FC fan flow measurement system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3048430A1 (en) * 2015-01-22 2016-07-27 Viessmann Werke GmbH & Co. KG Ventilator with pressure measurement point

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EA201590435A1 (en) 2015-08-31
EA039725B1 (en) 2022-03-04
PL2700822T3 (en) 2017-06-30
WO2014030055A1 (en) 2014-02-27

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