EP2904272B1 - Wandring für einen axialventilator - Google Patents

Wandring für einen axialventilator Download PDF

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Publication number
EP2904272B1
EP2904272B1 EP13763236.0A EP13763236A EP2904272B1 EP 2904272 B1 EP2904272 B1 EP 2904272B1 EP 13763236 A EP13763236 A EP 13763236A EP 2904272 B1 EP2904272 B1 EP 2904272B1
Authority
EP
European Patent Office
Prior art keywords
wall
ring according
wall ring
partial
longitudinal axis
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
EP13763236.0A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2904272A1 (de
Inventor
Thomas Heli
Peter Riegler
Jörg GÜNTHER
Joachim HÄFNER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ebm Papst Mulfingen GmbH and Co KG
Original Assignee
Ebm Papst Mulfingen GmbH and Co KG
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 Ebm Papst Mulfingen GmbH and Co KG filed Critical Ebm Papst Mulfingen GmbH and Co KG
Publication of EP2904272A1 publication Critical patent/EP2904272A1/de
Application granted granted Critical
Publication of EP2904272B1 publication Critical patent/EP2904272B1/de
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Anticipated expiration legal-status Critical

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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
    • F04D19/00—Axial-flow pumps
    • F04D19/002—Axial flow fans
    • 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
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/522—Casings; Connections of working fluid for axial pumps especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
    • F04D29/584—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps cooling or heating the machine

Definitions

  • the present invention relates to a wall ring for receiving in particular axial fans, comprising an annular body having a central longitudinal axis, with a flow inlet opening and a flow outlet opening and an annular wall extending between the two openings.
  • Axial fans are used, among other things, for applications at very low temperatures. There is a risk of ice formation and thus freezing of the fan blades on the wall ring. Typical applications where there is a risk are heat pumps, evaporators in cold rooms and the like. To prevent such freezing, a heating element is known to be applied as electrical resistance heating on the wall ring and used as a heater.
  • EP 1 363 383 A2 a wall ring for receiving in particular an axial fan, comprising an annular body having a flow inlet opening and a flow outlet opening and having a central longitudinal axis XX and extending between the two openings annular wall, wherein an electrical heating element at least over a portion of the circumference of the annular wall can be fastened.
  • the disadvantage here is the large amount of energy that must be introduced to heat through the wall ring, to prevent ice formation on the wall ring inside, and melt ice occurring. In this case, a high heat transfer to the environment and the introduced in this way into the cold room heat must be retrieved from the refrigerator. It follows that such a wall ring heating is energy inefficient.
  • the present invention is based on the object to avoid the above disadvantages and to reduce the formation of ice on the wall ring inside.
  • the annular wall has a cavity enclosed by an outer wall and an inner wall, in which an electric heating element can be fastened at least over a partial region of the circumference of the annular wall, and in that the annular body of the wall ring consists of at least two partial bodies formed by a division of the annular body in a plane perpendicular to the longitudinal axis separating plane and are releasably connected together.
  • the wall of the invention is made of plastic, so that alone by the inner cavity and the two-walledness and by the material used (plastic) of the wall ring according to the invention an ice formation on the wall ring inside is already reduced without the use of a heating element. Because the inside airspace and the outer wall serve as insulation from the environment.
  • the embodiment according to the invention makes it possible to insert a heating tape into the cavity formed between the outer wall and the inner wall, the heating tape resting on the inner wall of the annular wall.
  • the cavity formed between the outer wall and the inner wall is dimensioned with its void volume such that this void volume is at least twice as large as the volume of the advantageously used heating tape which serves as electrical resistance heating.
  • An inventive wall ring consists, as shown in the figures, of an annular body 1 with a central longitudinal axis XX, with a flow inlet opening 2 and a flow outlet opening 3.
  • the annular body 1 according to the invention has between the two openings 2, 3 an annular wall 4, the one has perpendicular to the central longitudinal axis XX related circular cross-section.
  • an axial fan 6 is located within the wall ring according to the invention. This consists of a centrally arranged in the central longitudinal axis XX electric motor 7, to which an impeller 8 is connected with fan blades 9.
  • the annular wall 4 consists of an outer wall 11 and an inner wall 12, which enclose a cavity 13 between them.
  • the inventive annular body 1 is divided by a division perpendicular to the longitudinal axis XX in two partial body 14,16, namely a partial body 14 which includes the flow inlet opening 2, and a partial body 16 which includes the flow outlet opening 3. Due to the division perpendicular to the longitudinal axis XX, these two partial bodies 14, 16 can be axially inserted into one another and moved axially apart from one another.
  • the annular body 1 according to the invention consists of plastic.
  • FIG. 3 the outer wall 11 and the inner wall 12 of the two body parts 14, 16 at their outer wall portions 17, 18 and their inner wall sections 19, 21 at their abutting ends respectively complementary step profiles 22, 23, so that an overlap in the Stepped profiles 22, 23 is given.
  • the outer wall sections 17, 18 and the inner wall sections 19, 21 of the split bodies 14, 16 each have different lengths, so that the outer wall sections 17, 18 are of different lengths, and the inner wall sections 19, 21 are also of different lengths, such that a longer one Outside wall portion 17 a shorter inner wall portion 19 is opposite and the shorter outer wall portion 18, a longer inner wall portion 21.
  • the inner wall 12 is convex curved, so that a flow profile is present, wherein a very small increase in the curvature curve is formed on both sides of the vertex at the apex of the curvature.
  • the outer wall 11 is advantageously made as a flat, parallel to the longitudinal axis XX extending wall profile.
  • an electric heating element 24 is disposed within the cavity 13, which is formed in the illustrated embodiment as a heating tape, which is expediently is an electrical resistance heating.
  • the electric heating element 24 is arranged such that it bears against the inner wall 12 at its inner side facing the cavity 13.
  • mounting pins 26 are formed, which include a gap with the respective inner wall portion 19, 21 whose gap width is greater than / equal to the thickness of the heating element 24 to be used.
  • the mounting pins 26 of the two Operagroper 14, 16 circumferentially staggered against each other in the assembled state of the body part 14, and their length is suitably greater than the width of the particular band-shaped heating element 24.
  • the band-shaped heating element 24 is for mounting under the mounting pin 26th pushed and is fixed by these axially and circumferentially. For this purpose, it is particularly advantageous if the mounting pins 26 overlap the heating element 24 on both sides of its circumferentially extending longitudinal edges.
  • the two partial bodies 14, 16 are advantageously detachably connected to one another by a plurality of screws 27 arranged circumferentially and axially in the direction of the longitudinal axis XX. Furthermore, it is expedient according to the invention if, on one of the part bodies 14, 16 in the present Embodiment on the Einströmungseintrittsö réelle 2 comprehensive part body 14 circumferentially a mounting flange 28 is formed. This mounting flange 28 is formed from an edge web radially projecting to the longitudinal axis XX. At this mounting flange 28 are preferably four circumferentially uniformly distributed mounting tabs 29 having holes for passing corresponding fasteners.
  • the electric motor 7 is held by a preferably planar wire guard 31, in particular made of metal, wherein the wire guard 31 is secured by means of struts 32 on the body part 14 on the circumference of the flow inlet opening 2.
  • a rectangular housing 33 is formed between two fastening tabs 29 on the annular body 1, which consists of two housing sections 34, 35, wherein the one housing portion 34 on the body part 14 and the other housing portion 35 is integrally formed on the body 16.
  • the housing 33 has a side wall section which runs parallel to a tangent to the flow inlet opening 2 or flow outlet opening 3 and which is connected to the respective partial body 14, 16 via wall sections extending perpendicular thereto.
  • the electrical connection line 37 of the electric motor 7 of the partial body 14 and the housing portion 34 to the outside, via holes in the partial body 16 and housing portion 35 out, and preferably parallel to the longitudinal axis XX, the first along the Protective grid 31 is guided, and on the other hand, the housing 33 serves for contacting the electric heating element 24 with an electrical supply line 38 which is inserted parallel to the longitudinal axis XX in the housing 33.
  • the closure of the housing 33 via screw elements, which are screwed from its rear side, ie from the side of the flow outlet opening 3 ago. The screwing of the fastening screws 27 takes place in the same way.
  • a cap 39 is mounted on the electric motor 7 through an opening of the protective grille 31, which serves as a jet water protection in a cleaning.
  • This cover 39 is preferably releasably secured by a particular latching connection.
  • the inventive two-piece wall ring made of plastic with integrated hollow chamber reduces the tendency to icing in fans, which are installed in refrigerators and evaporators, reduces the heat input into the heat exchanger, and by the also insertable heating element 24 icing is prevented.
  • the non-curved, ie planar metal protective grille 31 according to the invention can also be easily mechanically cleaned in the event of icing occurring.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Resistance Heating (AREA)
EP13763236.0A 2012-10-08 2013-09-16 Wandring für einen axialventilator Active EP2904272B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012109546.9A DE102012109546A1 (de) 2012-10-08 2012-10-08 "Wandring für einen Axialventilator"
PCT/EP2013/069145 WO2014056677A1 (de) 2012-10-08 2013-09-16 Wandring für einen axialventilator

Publications (2)

Publication Number Publication Date
EP2904272A1 EP2904272A1 (de) 2015-08-12
EP2904272B1 true EP2904272B1 (de) 2018-09-05

Family

ID=49212766

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13763236.0A Active EP2904272B1 (de) 2012-10-08 2013-09-16 Wandring für einen axialventilator

Country Status (6)

Country Link
US (1) US20150308455A1 (es)
EP (1) EP2904272B1 (es)
CN (1) CN104736852B (es)
DE (1) DE102012109546A1 (es)
ES (1) ES2699953T3 (es)
WO (1) WO2014056677A1 (es)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013015985B4 (de) * 2013-09-25 2016-08-18 Stego-Holding Gmbh Lüftereinrichtung
DE102013223983A1 (de) * 2013-11-25 2015-05-28 Ebm-Papst Mulfingen Gmbh & Co. Kg Lüfterbaueinheit
DE202015106594U1 (de) * 2015-03-10 2016-01-12 Ebm-Papst Mulfingen Gmbh & Co. Kg Ventilatorgehäuse mit Heizbandkanal
DE102015103501A1 (de) * 2015-03-10 2016-09-15 Ebm-Papst Mulfingen Gmbh & Co. Kg Mehrteiliges Gehäuse eines Ventilators
DE102018128823A1 (de) * 2018-11-16 2020-05-20 Ebm-Papst Mulfingen Gmbh & Co. Kg Diagonalventilator mit Heizelement
WO2023183105A1 (en) * 2022-03-22 2023-09-28 Rheem Manufacturing Company Axial fan for an air handling unit
US11933346B1 (en) * 2023-05-12 2024-03-19 Nokia Solutions And Networks Oy Removable shoulder screw

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4123197A (en) * 1977-02-04 1978-10-31 Allware Agencies Limited Fan with air directing grille
US4657483A (en) * 1984-11-16 1987-04-14 Bede James D Shrouded household fan
US20040231651A1 (en) * 2001-08-30 2004-11-25 Tim Wade Heated pcv valve and hose assemblies
US20120031509A1 (en) * 2010-08-06 2012-02-09 Dyson Technology Limited Fan assembly

Family Cites Families (22)

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Publication number Priority date Publication date Assignee Title
US2950859A (en) * 1956-12-03 1960-08-30 Meier Electric And Machine Com Fan housing and protective grill
US5377300A (en) * 1992-11-04 1994-12-27 Watkins-Johnson Company Heater for processing gases
DE19951369A1 (de) * 1999-10-26 2001-05-10 Bosch Gmbh Robert Gebläse
EP1201933B1 (de) * 2000-10-25 2006-03-08 Eichenauer Heizelemente GmbH & Co.KG Pumpe mit einem beheizbaren Gehäuse
ITTO20020419A1 (it) * 2002-05-17 2002-08-16 Cosmos Italia S R L Circuito di comando dotato di dispositivi riscaldanti o raffreddanti,in particolare per ventilatori a corrente continua.
US7819563B2 (en) * 2005-03-16 2010-10-26 Eric Neal Hardgrave Fan Chandelier
US7530783B1 (en) * 2005-10-28 2009-05-12 Vornado Air Circulation Systems, Inc. Grill mounting and retaining assembly
DE102007017271A1 (de) * 2007-04-12 2008-10-16 BSH Bosch und Siemens Hausgeräte GmbH Pumpe mit Heizeinrichtung
JP2009108714A (ja) * 2007-10-29 2009-05-21 Calsonic Kansei Corp ファンシュラウド
US20100111698A1 (en) * 2008-11-06 2010-05-06 Bryce Wiedeman Fan with locking ring
FR2947591B1 (fr) * 2009-07-02 2011-07-22 Valeo Systemes Thermiques Ensemble forme d'un support-moteur et d'une bague de reception de ce dernier
TWI400781B (zh) * 2010-05-26 2013-07-01 A semiconductor package with a cooling fan and a method for manufacturing the same, and a stacked structure of the package
GB2482549A (en) * 2010-08-06 2012-02-08 Dyson Technology Ltd A fan assembly with a heater
DE102010045899B3 (de) * 2010-09-17 2012-02-16 Ingo Schehr Ventilatoreinheit mit einem elektrischen Axialventilator
JP2012082580A (ja) * 2010-10-07 2012-04-26 Hitachi Constr Mach Co Ltd 建設機械
US9157453B2 (en) * 2011-08-23 2015-10-13 Ctb, Inc. Plastic fan shroud and cone assembly and method
DE102012108449A1 (de) * 2012-09-11 2014-03-13 Ebm-Papst Mulfingen Gmbh & Co. Kg Wandring eines Lüfters mit Heizelement
DE102012109542A1 (de) * 2012-10-08 2014-04-10 Ebm-Papst Mulfingen Gmbh & Co. Kg "Strömungsgleichrichter für einen Axiallüfter"
DE102012109518A1 (de) * 2012-10-08 2014-04-10 Ebm-Papst Mulfingen Gmbh & Co. Kg "Ventilator sowie zugehöriges Trägerelement"
DE102012109544A1 (de) * 2012-10-08 2014-04-10 Ebm-Papst Mulfingen Gmbh & Co. Kg "Wandring mit Wandringheizung für Axiallüfter"
DE102012109516B4 (de) * 2012-10-08 2016-08-04 Ebm-Papst Mulfingen Gmbh & Co. Kg "Trägerelement für einen Ventilator sowie damit ausgestatteter Ventilator"
USD771228S1 (en) * 2013-12-30 2016-11-08 Ebm-Papst Mulfingen Gmbh & Co. Kg Fan

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4123197A (en) * 1977-02-04 1978-10-31 Allware Agencies Limited Fan with air directing grille
US4657483A (en) * 1984-11-16 1987-04-14 Bede James D Shrouded household fan
US20040231651A1 (en) * 2001-08-30 2004-11-25 Tim Wade Heated pcv valve and hose assemblies
US20120031509A1 (en) * 2010-08-06 2012-02-09 Dyson Technology Limited Fan assembly

Also Published As

Publication number Publication date
ES2699953T3 (es) 2019-02-13
WO2014056677A1 (de) 2014-04-17
CN104736852B (zh) 2017-05-10
CN104736852A (zh) 2015-06-24
US20150308455A1 (en) 2015-10-29
DE102012109546A1 (de) 2014-04-10
EP2904272A1 (de) 2015-08-12

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