EP0166158B1 - Transverse-flow fan - Google Patents

Transverse-flow fan Download PDF

Info

Publication number
EP0166158B1
EP0166158B1 EP85105934A EP85105934A EP0166158B1 EP 0166158 B1 EP0166158 B1 EP 0166158B1 EP 85105934 A EP85105934 A EP 85105934A EP 85105934 A EP85105934 A EP 85105934A EP 0166158 B1 EP0166158 B1 EP 0166158B1
Authority
EP
European Patent Office
Prior art keywords
vortex
impeller
fan
cross
flow
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP85105934A
Other languages
German (de)
French (fr)
Other versions
EP0166158A1 (en
Inventor
Reinhold Hopfensperger
Klaus Täschner
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.)
Alcatel Lucent Deutschland AG
Original Assignee
Alcatel SEL AG
Standard Elektrik Lorenz 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 Alcatel SEL AG, Standard Elektrik Lorenz AG filed Critical Alcatel SEL AG
Publication of EP0166158A1 publication Critical patent/EP0166158A1/en
Application granted granted Critical
Publication of EP0166158B1 publication Critical patent/EP0166158B1/en
Expired legal-status Critical Current

Links

Images

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
    • F04D17/02—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal
    • F04D17/04—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal of transverse-flow type
    • 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
    • F04D29/422—Discharge tongues
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S415/00—Rotary kinetic fluid motors or pumps
    • Y10S415/914—Device to control boundary layer

Definitions

  • the invention relates to a cross-flow fan, consisting of a fan roller with blade edges running parallel to the axis of rotation, a baffle plate partially encompassing the fan roller, a vortex former and the side parts wholly or partially surrounding the fan roller ends.
  • Such a cross flow fan is known (US-A-3 223 313).
  • Ouerstromllibraryer the edge of the vortex former facing the fan roller is bent up.
  • this measure is only suitable to a limited extent in order to reduce the noise of the cross-flow fan. If the edge of the vortex generator is moved very close to the surface of the fan roller, the siren-like noise of the cross-flow fan is increased rather than reduced.
  • the edge of the vortex generator is moved further away from the surface of the fan roller, the siren-like noise is avoided, but due to the considerable turbulence that then occurs there is a significant drop in air performance, which is accompanied by a high noise component in the noise of the cross-flow fan.
  • a cross-flow fan is also known (DE-A-1 403 553), in which guide bodies are provided which are arranged separately from the vortex former. They should be used to try the siren-like sound, d. H. to suppress the unwanted noise by means of interference. It is intended to produce the same undesired audio frequency, which is, however, out of phase with the audio frequency generated by the vortex generator by 180 °.
  • the correct phase shift is apparently set by the position of the guide body, because with a change in the speed and the flow, the extinction of the unwanted vibrations is no longer guaranteed, so that the guide body, for. B. by pivoting, must be repositioned.
  • the guide body must be in the known solution in the area of the highest intake speeds, which means throttling the cross-flow fan, i.e. H. a reduction in performance.
  • the stable operating behavior of the cross-flow fan with the required power and noise values requires a stable position of the vortex center as well as low-loss intake and exhaust flow.
  • the guiding effect of the vortex forming walls can play an essential role in fulfilling these requirements. The reason for this is that with low to medium throttling of the cross-flow fan, the vortex center is very close to the vortex generator, which results in high velocities of the flow medium on the suction side of the vortex generator.
  • the cross-flow fan can produce a siren-like sound that clearly emerges from the usual noise.
  • This siren-like sound is known to those skilled in the art under the name "scoop frequency peak"; the amount of this tone can be according to the formula: are calculated, where n is the number of revolutions of the fan roller per minute and z is the number of blades of the fan roller.
  • the invention is therefore based on the object of specifying measures which reduce the siren-like sound at a cross-flow fan operated at low to medium counterpressures or completely prevent such that no changes occur in the stable operating behavior and the air performance.
  • the new solution should also be effective for any length of cross-flow fan.
  • this object is achieved in that a sharp-edged interfering body is arranged on the vortex former at a distance displacing from its closest approach to the roller surface, which stretches at least over half the length of the vortex former and the height of which is 0.01 to 0.08 times the roll diameter.
  • a cross-flow fan consists of the guide plate 1, the side parts 2, the fan roller 3 and the vortex former 4.
  • the fan roller 3 is rotated in the direction of arrow 5 by a motor, not shown, then air becomes air sucked in from the space above the vortex former and blown out of the pressure chamber below the vortex former 4 in the direction of arrow 6.
  • the baffle 1 in particular can be clearly seen from the cross section of the cross-flow fan according to FIG. 2.
  • the fan roller should have the diameter D.
  • the fan roller 4 which is rotated in the direction of the arrow 5, causes an intake flow in the space C above the vortex generator 3.
  • the vortex flow 7 with the vortex center 8 is present in the fan roller 3 and below the vortex former 4 in space A is the flow on the pressure side.
  • the blades on their way from room A to room C cross room B, in which there is a strongly turbulent flow.
  • This strongly turbulent flow has its cause in the disturbing body 9 on the vortex generator 4. It has the consequence that the blade does not come abruptly out of the pressure zone into the suction zone, but that the transition takes place gradually.
  • a certain pressure equalization between A and C can take place in room B.
  • the strongly turbulent flow in space B arises on a sharp edge of the disturbing body 9, at which the flow begins to break off.
  • the interfering body 9 can be a web which is stamped out of the vortex former 4 and which extends continuously or in sections over the entire length of the vortex former 4. It is not absolutely necessary for the disturbing body 9 to have the same length as the vortex former, but it should be at least half the length of the vortex former.
  • the interference body can also be put on.
  • FIGS. 4 to 6 show three different embodiments of the disturbing body 9.
  • the disturbing body 9 is a web which is inclined in the direction of the direction of rotation of the fan roller (arrow 5).
  • the web is inclined against the direction of rotation of the fan roller and in the embodiment according to FIG. 6 the web is at right angles to the surface of the vortex generator.
  • the distance a between the ends of the webs and the vortex forming surface should be 0.01 to 0.08 times the fan roller diameter D.

Landscapes

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

Description

Die Erfinöung betrifft einen Querstromlüfter, bestehend aus einer Lüfterwalze mit parallel zur Drehachse verlaufenden Schaufelkanten, einem die Lüfterwalze teilweise umfassenden Leitblech, einem Wirbelbildner und den die Lüfterwalzenenden ganz oder teilweise umschließenden Seitenteilen.The invention relates to a cross-flow fan, consisting of a fan roller with blade edges running parallel to the axis of rotation, a baffle plate partially encompassing the fan roller, a vortex former and the side parts wholly or partially surrounding the fan roller ends.

Ein solcher Querstromlüfter ist bekannt (US-A-3 223 313). Bei diesem bekannten Ouerstromlüfter ist die der Lüfterwalze zugewandte Kante des Wirbelbildners hochgebogen. Wie in der Beschreibung des bekannten Querstromlüfters bereits erwähnt, ist diese Maßnahme nur bedingt geeignet, um das Geräusch des Querstromlüfters zu verringern. Wenn die Kante des Wirbelbildners sehr nahe an die Oberfläche der Lüfterwalze heran verlegt wird, dann wird das sirenenartige Geräusch des Querstromlüfters eher erhöht als vermindert.Such a cross flow fan is known (US-A-3 223 313). In this known Ouerstromlüfter the edge of the vortex former facing the fan roller is bent up. As already mentioned in the description of the known cross-flow fan, this measure is only suitable to a limited extent in order to reduce the noise of the cross-flow fan. If the edge of the vortex generator is moved very close to the surface of the fan roller, the siren-like noise of the cross-flow fan is increased rather than reduced.

Wird dagegen die Kante des Wirbelbildners weiter von der Oberfläche der Lüfterwalze weg verlegt, dann wird zwar das sirenenartige Geräusch vermieden, infolge der dann jedoch auftretenden erheblichen Turbulenzen kommt es zu einem bedeutenden Luftleistungsabfall, welcher von einem hohen Rauschanteil im Geräusch des Querstromlüfters begleitet ist.If, on the other hand, the edge of the vortex generator is moved further away from the surface of the fan roller, the siren-like noise is avoided, but due to the considerable turbulence that then occurs there is a significant drop in air performance, which is accompanied by a high noise component in the noise of the cross-flow fan.

Es ist auch noch ein Querstromlüfter bekannt (DE-A-1 403 553), bei dem vom Wirbelbildner getrennt angeordnete Leitkörper vorhanden sind. Mit ihnen soll versucht werden, den sirenenartigen Ton, d. h. das unerwünschte Geräusch, mittels Interferenzen zu unterdrücken. Er soll die gleiche unerwünschte Tonfrequenz erzeugen, welche jedoch gegenüber der vom Wirbelbildner erzeugten Tonfrequenz um 180° phasenverschoben ist. Die korrekte Phasenverschiebung wird offenbar durch die Lage des Leitkörpers eingestellt, denn bei einer Änderung der Drehzahl und der Anströmung ist die Auslöschung der unerwünschten Schwingungen nicht mehr gewährleistet, so daß der Leitkörper, z. B. durch Verschwenken, neu positioniert werden muß.A cross-flow fan is also known (DE-A-1 403 553), in which guide bodies are provided which are arranged separately from the vortex former. They should be used to try the siren-like sound, d. H. to suppress the unwanted noise by means of interference. It is intended to produce the same undesired audio frequency, which is, however, out of phase with the audio frequency generated by the vortex generator by 180 °. The correct phase shift is apparently set by the position of the guide body, because with a change in the speed and the flow, the extinction of the unwanted vibrations is no longer guaranteed, so that the guide body, for. B. by pivoting, must be repositioned.

Außerdem muß sich der Leitkörper bei der bekannten Lösung im Bereich der größten Ansauggeschwindigkeiten befinden, wodurch eine Drosselung des Querstromlüfters, d. h. eine Leistungsminderung, erfolgt.In addition, the guide body must be in the known solution in the area of the highest intake speeds, which means throttling the cross-flow fan, i.e. H. a reduction in performance.

Die bekannte Lösung ist ziemlich aufwendig und hat außerdem eine Leistungsbeeinträchtigung des Querstromlüfters zur Folge.The known solution is quite complex and also has the consequence of impairing the performance of the cross-flow fan.

Querstromlüfter sind als in Großserien gefertigte Massenprodukte bekannt, welche in großer Zahl in Haushaltsgeräten, Heizlüftern, Klimageräten, Konvektoren, Kopiergeräten, Projektoren, Einschüben elektrischer und elektronischer Geräte und dergleichen verwendet werden. Sie besitzen einen einfach aufgebauten Wirbelbildner, der folgende drei Funktionen zu erfüllen hat:

  • 1. Ausbildung einer kontinuierlichen Wirbelströmung,
  • 2. Stabilisierung der Lage des Wirbelzentrums,
  • 3. Leitelement für die Zu- und Abströmung des Lüfters.
Cross-flow fans are known as mass-produced mass products, which are used in large numbers in household appliances, fan heaters, air conditioners, convectors, copiers, projectors, plug-ins of electrical and electronic devices and the like. They have a simple vortex generator that has the following three functions:
  • 1. formation of a continuous vortex flow,
  • 2. stabilization of the position of the vertebral center,
  • 3. Guide element for the inflow and outflow of the fan.

Das stabile Betriebsverhalten des Querstromlüfters bei den geforderten Leistungs-und Geräuschwerten setzt sowohl eine stabile Lage des Wirbelzentrums als auch möglichst verlustarme Ansaug- und Ausblasströmung voraus. Eine wesentliche Rolle bei der Erfüllung dieser Voraussetzungen kann dabei die Leitwirkung der Wirbelbildnerwandungen spielen. Ursache dafür ist, daß bei geringer bis mittlerer Drosselung des Querstromlüfters das Wirbelzentrum sehr nahe am Wirbelbildner liegt, wodurch auf der Saugseite des Wirbelbildners hohe Geschwindigkeiten des Strömungsmediums entstehen.The stable operating behavior of the cross-flow fan with the required power and noise values requires a stable position of the vortex center as well as low-loss intake and exhaust flow. The guiding effect of the vortex forming walls can play an essential role in fulfilling these requirements. The reason for this is that with low to medium throttling of the cross-flow fan, the vortex center is very close to the vortex generator, which results in high velocities of the flow medium on the suction side of the vortex generator.

Dabei kann der Querstromlüfter einen sirenenartigen Ton erzeugen, der aus dem üblichen Rauschen deutlich hervortritt. Dieser sirenenartige Ton ist unter dem Namen "Schaufel-Frequenz-Spitze" den Fachleuten bekannt; die Höhe dieses Tones kann nach der Formel:

Figure imgb0001
berechnet werden, wobei n die Anzahl der Umdrehungen der Lüfterwalze pro Minute und z die Anzahl der Schaufeln der Lüfterwalze ist.The cross-flow fan can produce a siren-like sound that clearly emerges from the usual noise. This siren-like sound is known to those skilled in the art under the name "scoop frequency peak"; the amount of this tone can be according to the formula:
Figure imgb0001
 are calculated, where n is the number of revolutions of the fan roller per minute and z is the number of blades of the fan roller.

Verantwortlich für diesen sirenenartigen Ton sind die am Wirbelbildner vorbeilaufenden Schaufeln der Lüfterwalze, welche an dieser Stelle auf einem kleinen Drehwinkel eine Wechselbeaufschlagung in folgender Weise erfahren.

  • a) die Strömungsrichtung erfährt eine Drehung von fast 180°
  • b) der Übergang vom Druckraum zum Saugraum, d. h. eine erhebliche Druckdifferenz.
Responsible for this siren-like sound are the blades of the fan roller that run past the vortex generator, which are subjected to alternating action at a small angle of rotation in the following manner.
  • a) the direction of flow undergoes a rotation of almost 180 °
  • b) the transition from the pressure chamber to the suction chamber, ie a considerable pressure difference.

Der Erfindung liegt daher die Aufgabe zugrunde, Maßnahmen anzugeben, welche den sirenenartigen Ton bei einem bei geringen bis mittleren Gegendrücken betriebenen Querstromlüfter vermindern oder vollständig in der Weise verhindern, daß sich am stabilen Betriebsverhalten und der Luftleistung keine Veränderungen ergeben. Die neue Lösung soll darüberhinaus bei jeder Baulänge des Querstromlüfters wirksam sein.The invention is therefore based on the object of specifying measures which reduce the siren-like sound at a cross-flow fan operated at low to medium counterpressures or completely prevent such that no changes occur in the stable operating behavior and the air performance. The new solution should also be effective for any length of cross-flow fan.

Diese Aufgabe ist erfindungsgemäß dadurch gelöst, daß auf dem Wirbelbildner in einem von seiner größten Annäherung an die Walzenoberfläche verschiebenen Abstand ein scharfkantiger Störkörper angeordnet ist, welcher sich wenigstens über die Hälfte der Länge des Wirbelbildners eistreckt und dessen Höhe das 0,01 bis 0,08-fache des Walzendurchmessers beträgt.According to the invention, this object is achieved in that a sharp-edged interfering body is arranged on the vortex former at a distance displacing from its closest approach to the roller surface, which stretches at least over half the length of the vortex former and the height of which is 0.01 to 0.08 times the roll diameter.

Vorteilhafte Ausgestaltungen der Erfindung sind in den Ansprüchen 2 bis 4 enthalten, welche nachstehend anhand der Figuren 1 bis 6 erläutert sind. Es zeigen:

  • Fig. 1 in perspektivischer Darstellung den vorderen Teil eines Querstromlüfters,
  • Fig. 2 den Querschnitt eines Querstromlüfters,
  • Fig. 3 den Strömungsverlauf in einem Querstromlüfter im Bereich des Wirbelbildners,
  • Fig. 4 eine Ausführungsform des Störkörpers,
  • Fig. 5 eine andere Ausführungsform des Störkörpers und
  • Fig. 6 eine weitere Ausführungsform des Störkörpers.
Advantageous embodiments of the invention are contained in claims 2 to 4, which are explained below with reference to FIGS. 1 to 6. Show it:
  • 1 is a perspective view of the front part of a cross-flow fan,
  • 2 shows the cross section of a cross-flow fan,
  • 3 shows the flow in a cross-flow fan in the area of the vortex generator,
  • 4 shows an embodiment of the interfering body,
  • Fig. 5 shows another embodiment of the interfering body and
  • Fig. 6 shows another embodiment of the interfering body.

Wie aus Fig. 1 ersichtlich ist, besteht ein Querstromlüfter aus dem Leitblech 1, den Seitenteilen 2, der Lüfterwalze 3 und dem Wirbelbildner 4. Wenn die Lüfterwalze 3 von einem nicht gezeigten Motor in Richtung des Pfeiles 5 in Drehung versetzt wird, dann wird Luft aus dem Raum oberhalb des Wirbelbildners angesaugt und aus dem Druckraum unterhalb des Wirbelbildners 4 in Richtung des Pfeiles 6 ausgeblasen.As can be seen from FIG. 1, a cross-flow fan consists of the guide plate 1, the side parts 2, the fan roller 3 and the vortex former 4. When the fan roller 3 is rotated in the direction of arrow 5 by a motor, not shown, then air becomes air sucked in from the space above the vortex former and blown out of the pressure chamber below the vortex former 4 in the direction of arrow 6.

Aus dem Ouerschnitt des Querstromlüfters gemäß Fig. 2 ist besonders das Leitblech 1 deutlich zu erkennen. Die Lüfterwalze soll den Durchmesser D besitzen.The baffle 1 in particular can be clearly seen from the cross section of the cross-flow fan according to FIG. 2. The fan roller should have the diameter D.

Anhand von Fig. 3 ist die Erfindung und deren Wirkungsweise verdeutlicht. Die in Richtung des Pfeiles 5 in Drehung versetzte Lüfterwalze 4 bewirkt in dem Raum C oberhalb des Wirbelbildners 3 eine Ansaugströmung. In der Lüfterwalze 3 ist die Wirbelströmung 7 mit dem Wirbelzentrum 8 vorhanden und unterhalb des Wirbelbildners 4 ist in dem Raum A die Strömung auf der Druckseite. Wie aus Fig. 3 ersichtlich, durchqueren die Schaufeln auf ihrem Weg vom Raum A zum Raum C den Raum B, in dem eine stark turbulente Strömung herrscht. Diese stark turbulente Strömung hat ihre Ursache in dem Störkörper 9 auf dem Wirbelbildner 4. Sie hat zur Folge, daß die Schaufel nicht abrupt aus der Druck- in die Saugzone gelangt, sondern daß der Übergang allmählich erfolgt. Im Raum B kann ein gewisser Druckausgleich zwischen A und C erfolgen. Die stark turbulente Strömung im Raum B entsteht an einer scharfen Kante des Störkörpers 9, an welcher die Strömung abzureißen beginnt.3, the invention and its mode of operation are illustrated. The fan roller 4, which is rotated in the direction of the arrow 5, causes an intake flow in the space C above the vortex generator 3. The vortex flow 7 with the vortex center 8 is present in the fan roller 3 and below the vortex former 4 in space A is the flow on the pressure side. As can be seen from FIG. 3, the blades on their way from room A to room C cross room B, in which there is a strongly turbulent flow. This strongly turbulent flow has its cause in the disturbing body 9 on the vortex generator 4. It has the consequence that the blade does not come abruptly out of the pressure zone into the suction zone, but that the transition takes place gradually. A certain pressure equalization between A and C can take place in room B. The strongly turbulent flow in space B arises on a sharp edge of the disturbing body 9, at which the flow begins to break off.

Bei dem Störkörper 9 kann es sich um einen aus dem Wirbelbildner 4 herausgeprägten Steg handeln, der sich kontinuierlich oder in Abschnitten über die gesamte Länge des Wirbelbildners 4 erstreckt. Es ist nicht unbedingt erfoderlich, daß der Störkörper 9 die gleiche Länge wie der Wirbelbildner besitzt, jedoch sollte er wenigstens die halbe Länge des Wirbelbildners besitzen.The interfering body 9 can be a web which is stamped out of the vortex former 4 and which extends continuously or in sections over the entire length of the vortex former 4. It is not absolutely necessary for the disturbing body 9 to have the same length as the vortex former, but it should be at least half the length of the vortex former.

Anstelle der Herausprägung kann der Störkörper auch aufgesetzt sein.Instead of being stamped out, the interference body can also be put on.

Die Figuren 4 bis 6 zeigen drei verschiedene Ausführungsformen des Störkörpers 9. Bei dem Ausführungsbeispiel gemäß Fig. 4 ist der Störkörper 9 ein Steg, der in Richtung der Drehrichtung der Lüfterwalze (Pfeil 5) geneigt ist. Bei der Ausführungsform gemäß Fig. 5 ist der Steg entgegen der Drehrichtung der Lüfterwalze geneigt und bei der Ausführungsform gemäß Fig. 6 steht der Steg im rechten Winkel zur Wirbelbildneroberfläche. Der Abstand a zwischen den Enden der Stege und der Wirbelbildneroberfläche sollte das 0,01 bis 0,08- fache des Lüfterwalzendurchmessers D betragen.FIGS. 4 to 6 show three different embodiments of the disturbing body 9. In the exemplary embodiment according to FIG. 4, the disturbing body 9 is a web which is inclined in the direction of the direction of rotation of the fan roller (arrow 5). In the embodiment according to FIG. 5, the web is inclined against the direction of rotation of the fan roller and in the embodiment according to FIG. 6 the web is at right angles to the surface of the vortex generator. The distance a between the ends of the webs and the vortex forming surface should be 0.01 to 0.08 times the fan roller diameter D.

Durch Vergleichsmessungen an Ausführungsbeispielen, bei denen die Lüfterwalze 20 Schaufeln besaß und mit Drehzahlen von 1800 bis 2000 Umdrehungen pro Minute betrieben wurde, ist festgestellt worden, daß bei dem Querstromlüfter, dessen Wirbelbildner den Störkörper aufwies, die Frequenzspitzen bei 600 bis 700 Hz sehr stark reduziert waren.By comparative measurements on exemplary embodiments in which the fan roller had 20 blades and was operated at speeds of 1800 to 2000 revolutions per minute, it was found that the cross-flow fan, whose vortex generator had the interfering body, greatly reduced the frequency peaks at 600 to 700 Hz were.

Claims (4)

1. A tangential blower consisting of an impeller having blade edges extending parallel in relation to the axis of rotation, a deflector partially surrounding the impeller, a vortex former and the side members completely or partially surrounding the impeller ends, characterised in that, on the vortex former (4), at a distance different from its greatest approximation to the circumference of the impeller, there is arranged a sharp-edged interfering body (9) which extends over at least one half of the length of said vortex former and whose height ranges between 0.01 and 0.08 of the diameter of the impeller.
2. A tangential blower as claimed in Claim 1, characterized in that the interfering body consists of a ridge standing perpendicularly on the surface of the vortex former.
3. A tangential blower as claimed in Claim 1, characterized in that the interfering body consists of a ridge on the surface of the vortex former which is inclined in opposition to the direction or rotation of the impeller.
4. A tangential blower as claimed in Claim 1, characterised in that the interfering body consists of a ridge on the surface of the vortex former which is inclined in the direction of rotation of the impeller.
EP85105934A 1984-05-16 1985-05-14 Transverse-flow fan Expired EP0166158B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3418160 1984-05-16
DE19843418160 DE3418160A1 (en) 1984-05-16 1984-05-16 CROSS-FLOW FAN

Publications (2)

Publication Number Publication Date
EP0166158A1 EP0166158A1 (en) 1986-01-02
EP0166158B1 true EP0166158B1 (en) 1989-03-08

Family

ID=6235999

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85105934A Expired EP0166158B1 (en) 1984-05-16 1985-05-14 Transverse-flow fan

Country Status (4)

Country Link
US (1) US4712976A (en)
EP (1) EP0166158B1 (en)
JP (1) JPS60256594A (en)
DE (2) DE3418160A1 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5197850A (en) * 1987-01-30 1993-03-30 Sharp Kabushiki Kaisha Cross flow fan system
US4913622A (en) * 1987-01-30 1990-04-03 Sharp Kabushiki Kaisha Cross flow fan system
US5120193A (en) * 1990-02-26 1992-06-09 General Motors Corporation Baffle for reducing airflow noise in a scroll housing
US5314300A (en) * 1992-01-13 1994-05-24 Fasco Industries, Inc. Noise control device for centrifugal blower
US5388958A (en) * 1993-09-07 1995-02-14 Heat Pipe Technology, Inc. Bladeless impeller and impeller having internal heat transfer mechanism
DE9400977U1 (en) * 1994-01-21 1994-04-14 Erwin Müller GmbH & Co, 49808 Lingen Fan coil
US5484259A (en) * 1994-06-13 1996-01-16 Emerson Electric Co. Low noise centrifugal blower
JP3632789B2 (en) * 1995-08-28 2005-03-23 東陶機器株式会社 Multiblade centrifugal fan design method and multiblade centrifugal fan
AU719205B2 (en) * 1996-08-23 2000-05-04 Mitsubishi Denki Kabushiki Kaisha Air conditioner indoor unit
US5868551A (en) * 1997-05-02 1999-02-09 American Standard Inc. Tangential fan cutoff
US5944481A (en) * 1997-11-10 1999-08-31 Carrier Corporation Transverse fan with flow stabilizer
DE10038753B4 (en) * 2000-08-09 2006-07-06 Ltg Aktiengesellschaft Tangential fan

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1252057A (en) * 1959-04-15 1961-01-27 Heating and ventilation device for rooms and objects
GB973475A (en) * 1961-03-08 1964-10-28 Apsley Metal Products Ltd Improvements in or relating to cross-flow blowers
US3295750A (en) * 1962-09-05 1967-01-03 Laing Vortex Inc Cross flow machine
US3223313A (en) * 1964-02-04 1965-12-14 Lau Blower Co Air moving device
DE1428130A1 (en) * 1964-10-03 1968-11-28 Ernst Heinkel Ag Fan, especially tangential fan
DE1503673B2 (en) * 1965-03-30 1972-07-06 Zenkner, Kurt, Dr.-Ing., 7505 Ettlingen HOUSING FOR CROSS-FLOW FAN
DE1951115B2 (en) * 1969-10-10 1976-10-21 Böhler-Zenkner GmbH & Co KG Strömungstechnik, 4005 Meerbusch CROSS-FLOW FAN
US4073338A (en) * 1973-06-26 1978-02-14 Toyota Chuo Kenkyusho Heat exchangers
SU503044A1 (en) * 1973-10-25 1976-02-15 Институт Горной Механики И Технической Кибернетики Имени М.М.Федорова Centrifugal fan
DE2414610C3 (en) * 1974-03-26 1980-11-13 Standard Elektrik Lorenz Ag, 7000 Stuttgart Cross-flow fan
DE2448362C2 (en) * 1974-10-10 1983-01-20 Standard Elektrik Lorenz Ag, 7000 Stuttgart Cross-flow fan designed as a small or very small fan with increased air outlet speed in the edge zones near the end plate
US4078870A (en) * 1976-06-16 1978-03-14 International Standard Electric Corporation Tangential blower
JPS5651852Y2 (en) * 1978-07-07 1981-12-03

Also Published As

Publication number Publication date
US4712976A (en) 1987-12-15
JPH0448959B2 (en) 1992-08-10
EP0166158A1 (en) 1986-01-02
JPS60256594A (en) 1985-12-18
DE3418160A1 (en) 1985-11-28
DE3568613D1 (en) 1989-04-13

Similar Documents

Publication Publication Date Title
EP0166158B1 (en) Transverse-flow fan
DE69810705T2 (en) Flow stabilizer for cross-flow fans
DE2529541A1 (en) FAN WITH REDUCED NOISE GENERATION
DE3539604C1 (en) Axial fan
DE3128625A1 (en) BLOWFLOW BLOWER
DE3609212A1 (en) AXIAL FAN
DE69625917T2 (en) RADIAL FAN WHEEL
DE102004023270A1 (en) An axial flow fan
DE68904169T2 (en) TRANSITION CHANNEL FOR RADIAL COMPRESSORS.
CH667901A5 (en) BUILT-IN FAN.
DE3855315T2 (en) Cross flow fan
DE2530742B2 (en) Low-noise cooling system, in particular for motor vehicles
DE2546280A1 (en) Centrifugal fan impeller with blades parallel to axis - has blade edges with sawtooth serrations arranged in comb fashion
DE3326651A1 (en) CROSS-FLOW FAN
DE2460069A1 (en) WATER SEPARATOR WITH SOUND ATTENUATION
DE2414610B2 (en) Cross-flow fan
WO1995015440A1 (en) Device for preventing turbulence at pump inlets
DE3234011A1 (en) Axial fan
DE3425450C2 (en)
DE2545036A1 (en) HOUSING FOR A CROSS-FLOW FAN
DE102020104387B4 (en) Hob with hob and suction device for cooking vapors
EP0132780B1 (en) Transverse flow fan with increased exit flow velocity in the region of the side walls
DE2448362C2 (en) Cross-flow fan designed as a small or very small fan with increased air outlet speed in the edge zones near the end plate
DE2437001A1 (en) RADIAL FAN
DE3406368A1 (en) Cross-flow fan

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB IT SE

17P Request for examination filed

Effective date: 19860621

17Q First examination report despatched

Effective date: 19870202

ITF It: translation for a ep patent filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT SE

REF Corresponds to:

Ref document number: 3568613

Country of ref document: DE

Date of ref document: 19890413

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19930415

Year of fee payment: 9

ITPR It: changes in ownership of a european patent

Owner name: CAMBIO RAGIONE SOCIALE;ALCATEL SEL AKTIENGESELLSCH

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19930526

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19930527

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19930716

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19940514

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19940515

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19940514

EUG Se: european patent has lapsed

Ref document number: 85105934.5

Effective date: 19941210

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19950131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19950201

EUG Se: european patent has lapsed

Ref document number: 85105934.5

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST