EP3367009B1 - Zentrifugallüfter - Google Patents

Zentrifugallüfter Download PDF

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Publication number
EP3367009B1
EP3367009B1 EP17380008.7A EP17380008A EP3367009B1 EP 3367009 B1 EP3367009 B1 EP 3367009B1 EP 17380008 A EP17380008 A EP 17380008A EP 3367009 B1 EP3367009 B1 EP 3367009B1
Authority
EP
European Patent Office
Prior art keywords
impeller
arms
rotation
motor
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.)
Active
Application number
EP17380008.7A
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English (en)
French (fr)
Other versions
EP3367009A1 (de
Inventor
Roger Madorell Costa
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.)
Soler and Palau Research SL
Original Assignee
Soler and Palau Research SL
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 Soler and Palau Research SL filed Critical Soler and Palau Research SL
Priority to SI201731379T priority Critical patent/SI3367009T1/sl
Priority to ES17380008T priority patent/ES2950615T3/es
Priority to EP17380008.7A priority patent/EP3367009B1/de
Priority to HRP20230724TT priority patent/HRP20230724T1/hr
Priority to UAA201802039A priority patent/UA126370C2/uk
Priority to RU2018107006A priority patent/RU2715428C2/ru
Publication of EP3367009A1 publication Critical patent/EP3367009A1/de
Application granted granted Critical
Publication of EP3367009B1 publication Critical patent/EP3367009B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/32—Supports for air-conditioning, air-humidification or ventilation units

Definitions

  • the present invention relates to means for driving air which are used in ventilation installations, proposing a ventilation device with an improved support which determines an advantageous soundproofing embodiment.
  • plug fan-type centrifugal fans are known and have been widely used in recent years as a ventilation module that can be coupled to ventilation boxes, air treatment units, in walls and drop ceilings with chambers for moving air, roof fans, etc.
  • Plug fan-type centrifugal fans comprise a front part with an air suction mouth, a motor-impeller assembly provided with blades the axis of rotation of which is arranged axially with respect to the air suction mouth and a support connecting the motor-impeller assembly with the front part.
  • the air is introduced axially into the ventilation device through the suction mouth due to the centrifugal force caused by the rotation of the blades of the impeller, and it is expelled from the ventilation device in a direction perpendicular to the axis of rotation of the impeller with a deflection angle in the direction of rotation of the impeller.
  • the supports used for connecting the motor-impeller assembly with the front part of the ventilation device are formed by tubular elements, quadrangular elements or bent metal sheets which, due to their configuration and arrangement, generate a certain degree of air distortion when the ventilation device is in operation.
  • EP2080912 relates to a centrifugal fan with support arms.
  • the invention relates to a centrifugal fan (the term ventilation device is also used herein interchangeably to denote the centrifugal fan) having an improved soundproofing performance.
  • the centrifugal fan comprises:
  • the arms have a front face and side faces, wherein the front face has a smaller thickness than the side faces. Said front face of smaller thickness is facing the direction in which the air is driven, whereas the side faces are parallel to the direction in which the air is driven.
  • the arms have a first part connected to the motor and impeller assembly, a second part connected to the front part and a third part connecting the first part with the second part.
  • the first part of each arm has a connection point for connecting with the arm located immediately adjacent thereto according to the opposite direction of rotation of the impeller, and a second connection point for connecting with the arm located immediately adjacent thereto according to the direction of rotation of the impeller.
  • the flat laminar shape of the arms is such that the first part of the arms extends in a direction substantially perpendicular to the axis of rotation of the motor and impeller assembly, the second part extends in a direction substantially parallel to the axis of rotation of the motor and impeller assembly, and the third part connects the first part with the second part by way of a bend.
  • the arms are preferably L-shaped.
  • the curvature of the arms is for reducing the noise caused by the passage of the blades.
  • a centrifugal fan is thereby obtained which, on one hand, due to the shape and orientation of its arms, minimizes the noise of the ventilation device due to the exposure to the expelled airflow to which the arms are subjected, whereas on the other hand, connecting the arms with one another and their orientation allows withstanding the torsional stresses generated by the motor and impeller assembly without the arms producing a resonant effect.
  • the ventilation device of the invention comprising a front part (1) with a suction mouth (2) for introducing air into the ventilation device, an assembly formed by a motor (3) and an impeller (4) provided with blades (5) for driving the suctioned air out of the ventilation device and arms (6) connecting the assembly formed by the motor (3) and the impeller (4) with the front part (1).
  • the motor (3) is partially integrated in the impeller (4) such that the arms (6) connect the part of the motor (3) projecting out of the impeller (4) with the front part (1) of the ventilation device in which the suction mouth (2) is located.
  • the axis of rotation of the motor (3) is coaxial with the axis of rotation of the impeller (4), and the axis of rotation of said assembly formed by the motor (3) and the impeller (4) is arranged axially with respect to the suction mouth (2).
  • Figure 4 shows the path the air follows through the ventilation device by means of arrows drawn with dashed lines.
  • the rotation of the blades (5) of the impeller (4) causes the air to axially enter the ventilation device through the suction mouth (2) to then make a 90° turn and be driven out of the ventilation device in a direction (D) which is perpendicular (r) to the axis of rotation of the impeller (4) with a deflection angle ( ⁇ ) in the direction of rotation (G) of the impeller (4).
  • the deflection angle ( ⁇ ) is comprised between 15° and 45°.
  • FIG. 5 The schematic plan view of Figure 5 shows the direction (D) in which the air is driven out of the ventilation device.
  • the outer profile of the blades (5) of the impeller (4) describes a circumference (c) depicted by a dashed line, such that when a blade (5) passes through a point (p) of said circumference (c) the air is driven with respect to said point (p) in the direction (D) which is perpendicular (r) to the axis of rotation of the impeller (4) with a deflection angle ( ⁇ ) in the direction of rotation (G) of the impeller (4).
  • the invention has envisaged that the arms (6) will have a flat laminar shape with a main longitudinal axis (x) (depicted by dashed lines) extending in the direction (D) in which the air is driven (see Figure 3 ).
  • the arms (6) therefore, have a rectangular section with a front face (F), a rear face (R) and two side faces (L).
  • the front face (F) has a smaller thickness than the side faces (L), said front face (F) of smaller thickness facing the direction (D) in which the air is driven, whereas the side faces (L) of larger thickness are parallel to the direction (D) in which the air is driven without creating interferences with the air.
  • the arms (6) have a first part (6.1) which is connected to the assembly formed by the motor (3) and the impeller (4), a second part (6.2) which is connected to the front part (1) and a third part (6.3) connecting the first part (6.1) with the second part (6.2).
  • the first part (6.1) of each arm (6) has a connection point (u) for connecting with the arm (6) located immediately adjacent thereto according to the opposite direction of rotation (G) of the impeller (4), and a second connection point (u') for connecting with the arm (6) located immediately adjacent thereto according to the direction of rotation (G) of the impeller (4).
  • connection of the arms (6) with one another, together with the orientation thereof in the direction (D) in which the air is driven, means that the arms (6) work like struts, and that the connection with the front part (1) of the ventilation device is much more rigid against torsional vibrations of the motor (3).
  • the arms (6) are L-shaped, wherein the first part (6.1) extends in a direction substantially perpendicular to the axis of rotation of the motor (3), the second part (6.2) extends in a direction substantially parallel to the axis of rotation of the motor (3), and the third part (6.3) connects the first part (6.1) with the second part (6.2) by way of a bend.
  • the front face (F) of the arms (6) facing the direction (D) in which the air is driven has a curvature which tends to reduce the noise generated by the blades (5) of the impeller (4).
  • the third part (6.3) of the arm (6) connecting the first part (6.1) with the second part (6.2) has a radius of curvature (r3) allowing a gradual transition between the first part (6.1) and the second part (6.2).
  • the third part (6.3) of the arm (6) is precisely the part of the arm exposed the most to the air driven by the impeller (4), so since said part has a curvature, a "guillotine" effect reducing the noise caused by the passage of the blades (5) is generated, which would not be the case if the transition between the first part (6.1) and the second part (6.2) was by way of a 90° bend and did not have a radius of curvature (r3).
  • the first part (6.1) and the second part (6.2) also have a slight radius of curvature, such that the curvature of the second part (6.2) also helps to reduce the noise of the blades (5) of the impeller (4), whereas since all the parts of the arm (6) have a curvature on the front face (F) thereof, the distribution of torsional vibrations that are transmitted to the arm (6) from the motor (3) is improved.
  • the arms (6) are connected to the motor (3) through a flat bar (7), although the arms (6) may be directly connected to the motor (3) or to a casing surrounding the impeller (4), without this altering the concept of the invention.
  • the embodiment of the ventilation device shown in Figures 1 to 5 has four arms (6), although the number of arms (6) will be selected depending on the size of the motor (3) and impeller (4) assembly, having to use at least three arms (6) for connecting the motor (3) and impeller (4) assembly with the front part (1).
  • Figures 6 to 11 show different configurations of the arms (6).
  • Figures 6 and 9 show a three-arm configuration
  • Figures 7 and 10 show a four-arm configuration
  • Figures 8 and 11 show a six-arm configuration.
  • the position of the arms changes depending on the direction of rotation (G) of the impeller, therefore when the impeller rotates in the counterclockwise direction the arms are arranged as shown in Figures 6, 7 and 8 , whereas when the impeller (4) rotates in the clockwise direction the arms are arranged as shown in Figures 9, 10 and 11 .
  • the arms (6) are arranged according to a symmetrical distribution with respect to the axis of rotation of the motor (3) and impeller (4) assembly allowing the torsional vibrations of the motor (3) to be uniformly distributed throughout all the arms (6).
  • the arms (6) are connected with one another forming a 60° angle; when four arms (6) are used, the arms (6) are connected with one another forming a 90° angle; whereas when six arms (6) are used, the arms (6) are connected with one another forming a 120° angle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Centrifugal Separators (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Air-Flow Control Members (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Claims (6)

  1. Zentrifugallüfter, der aufweist:
    - einen Vorderteil (1) mit einer Saugmündung (2), durch die Luft in den Zentrifugallüfter eingeleitet wird,
    - eine Motor- (3) und Flügelrad- (4) Anordnung mit Flügeln (5) mit einer Drehachse, die in Bezug auf die Saugmündung axial angeordnet ist, wobei die Motor- (3) und Flügelrad- (4) Anordnung derart konfiguriert ist, dass die Luft während der Verwendung in eine Richtung (D) angetrieben wird, die mit einem Ablenkwinkel (α) in der Drehrichtung (G) des Flügelrads (4) senkrecht zu der Drehachse ist, und
    - Halteeinrichtungen zum Verbinden der Motor- (3) und Flügelrad- (4) Anordnung mit dem Vorderteil (1), wobei die Halteeinrichtungen wenigstens drei Arme (6) mit einer flachen laminaren Form, die sich in die Richtung (D), in welche die Luft angetrieben wird, erstrecken, aufweisen, und wobei wenigstens der Teil der Arme (6), welcher der Richtung (D), in welche die Luft angetrieben wird, zugewandt ist, eine Krümmung hat.
  2. Zentrifugallüfter nach dem vorhergehenden Anspruch, wobei die Arme (6) eine Vorderfläche (F) und Seitenflächen (L) haben, wobei die Vorderfläche (F) eine kleinere Dicke als die Seitenflächen (L) hat, wobei die Vorderfläche (F) mit kleinerer Dicke der Richtung (D) zugewandt ist, in welche die Luft angetrieben wird, während die Seitenflächen (L) parallel zu der Richtung (D), in welche die Luft angetrieben wird, sind.
  3. Zentrifugallüfter nach einem der vorhergehenden Ansprüche, wobei die Arme (6) einen ersten Teil (6.1), der mit der Motor- (3) und Flügelrad- (4) Anordnung verbunden ist, einen zweiten Teil (6.2), der mit dem Vorderteil (1) verbunden ist, und einen dritten Teil (6.3), der den ersten Teil (6.1) mit dem zweiten Teil (6.2) verbindet, haben, wobei der erste Teil (6.1) jedes Arms (6) einen Verbindungspunkt (u) zum Verbinden mit dem gemäß der entgegensetzten Drehrichtung (G) des Flügelrads (4) unmittelbar dazu angrenzenden Arm (6) und einen zweiten Verbindungspunkt (u') zum Verbinden mit dem gemäß der Drehrichtung (G) des Flügelrads (4) unmittelbar dazu angrenzenden Arm (6) hat.
  4. Zentrifugallüfter nach dem vorhergehenden Anspruch, wobei der erste Teil (6.1) der Arme (6) sich in eine Richtung im Wesentlichen senkrecht zu der Drehachse der Motor- (3) und Flügelrad- (4) Anordnung erstreckt, der zweite Teil (6.2) sich in eine Richtung im Wesentlichen parallel zu der Drehachse der Motor- (3) und Flügelrad- (4) Anordnung erstreckt und der dritte Teil (6.3) den ersten Teil (6.1) durch einen Bogen mit dem zweiten Teil (6.2) verbindet.
  5. Zentrifugallüfter nach einem der vorhergehenden Ansprüche, wobei die Arme (6) L-förmig sind.
  6. Zentrifugallüfter nach einem der vorhergehenden Ansprüche, wobei die Arme (6) in Bezug auf die Drehachse der Motor- (3) und Flügelrad- (4) Anordnung gemäß einer symmetrischen Verteilung angeordnet sind.
EP17380008.7A 2017-02-28 2017-02-28 Zentrifugallüfter Active EP3367009B1 (de)

Priority Applications (6)

Application Number Priority Date Filing Date Title
SI201731379T SI3367009T1 (sl) 2017-02-28 2017-02-28 Centrifugalni ventilator
ES17380008T ES2950615T3 (es) 2017-02-28 2017-02-28 Ventilador centrífugo
EP17380008.7A EP3367009B1 (de) 2017-02-28 2017-02-28 Zentrifugallüfter
HRP20230724TT HRP20230724T1 (hr) 2017-02-28 2017-02-28 Centrifugalni ventilator
UAA201802039A UA126370C2 (uk) 2017-02-28 2018-02-27 Вентиляційний пристрій
RU2018107006A RU2715428C2 (ru) 2017-02-28 2018-02-27 Вентиляционное устройство

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17380008.7A EP3367009B1 (de) 2017-02-28 2017-02-28 Zentrifugallüfter

Publications (2)

Publication Number Publication Date
EP3367009A1 EP3367009A1 (de) 2018-08-29
EP3367009B1 true EP3367009B1 (de) 2023-04-19

Family

ID=58632914

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17380008.7A Active EP3367009B1 (de) 2017-02-28 2017-02-28 Zentrifugallüfter

Country Status (6)

Country Link
EP (1) EP3367009B1 (de)
ES (1) ES2950615T3 (de)
HR (1) HRP20230724T1 (de)
RU (1) RU2715428C2 (de)
SI (1) SI3367009T1 (de)
UA (1) UA126370C2 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019119750A1 (de) * 2019-07-22 2021-01-28 Ebm-Papst Mulfingen Gmbh & Co. Kg Befestigungsvorrichtung zum Befestigen eines Ventilators an einer Trägerstruktur

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1614190A (en) * 1925-06-08 1927-01-11 Buffalo Forge Co Fan bracket or support
US2615620A (en) * 1950-06-23 1952-10-28 Adam D Goettl Fan motor mount on ventilating panel
US4055113A (en) * 1976-05-07 1977-10-25 Robbins & Myers, Inc. Ventilator apparatus
JPS5773891A (en) * 1980-10-24 1982-05-08 Nikkiso Co Ltd Submerged pump support structure
US4394111A (en) * 1981-09-11 1983-07-19 Snyder General Corporation Top cover, motor, fan and fan shroud assembly for an air conditioning unit
US4685513A (en) * 1981-11-24 1987-08-11 General Motors Corporation Engine cooling fan and fan shrouding arrangement
JP2002005098A (ja) * 2000-06-16 2002-01-09 Toshiba Corp 家電機器用のファン装置
CA2368365C (en) * 2002-01-16 2009-07-21 Aeroflo Inc. Mounting bracket for fan motor
NL1034926C2 (nl) * 2008-01-18 2009-07-21 Holland Conditioning Parkeersystemen Bv Ventilatorinrichting met ophanging aan motor.
DE202008002356U1 (de) * 2008-02-19 2009-06-25 Ebm-Papst Mulfingen Gmbh & Co. Kg Kompaktlüfter
DE102008014702A1 (de) * 2008-03-18 2009-09-24 Stadtmüller, Uwe Motoraufhängung für einen Axiallüfter und Verfahren zur Herstellung einer Motoraufhängung
US9945390B2 (en) * 2014-07-31 2018-04-17 Regal Beloit America, Inc. Centrifugal blower and method of assembling the same

Also Published As

Publication number Publication date
EP3367009A1 (de) 2018-08-29
UA126370C2 (uk) 2022-09-28
RU2715428C2 (ru) 2020-02-28
RU2018107006A3 (de) 2020-01-22
SI3367009T1 (sl) 2023-10-30
RU2018107006A (ru) 2019-08-27
HRP20230724T1 (hr) 2023-10-13
ES2950615T3 (es) 2023-10-11

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