EP3293399A1 - Systéme de ventilateur pour un appareil ménager, tel un aspirateur - Google Patents

Systéme de ventilateur pour un appareil ménager, tel un aspirateur Download PDF

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Publication number
EP3293399A1
EP3293399A1 EP17185430.0A EP17185430A EP3293399A1 EP 3293399 A1 EP3293399 A1 EP 3293399A1 EP 17185430 A EP17185430 A EP 17185430A EP 3293399 A1 EP3293399 A1 EP 3293399A1
Authority
EP
European Patent Office
Prior art keywords
opening edge
fan
sealing ring
blower
impeller
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
EP17185430.0A
Other languages
German (de)
English (en)
Other versions
EP3293399B1 (fr
Inventor
Manfred Gerhards
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.)
Miele und Cie KG
Original Assignee
Miele und Cie 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 Miele und Cie KG filed Critical Miele und Cie KG
Publication of EP3293399A1 publication Critical patent/EP3293399A1/fr
Application granted granted Critical
Publication of EP3293399B1 publication Critical patent/EP3293399B1/fr
Active legal-status Critical Current
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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/02—Selection of particular materials
    • F04D29/023—Selection of particular materials 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
    • F04D29/08—Sealings
    • F04D29/16—Sealings between pressure and suction sides
    • F04D29/161—Sealings between pressure and suction sides especially adapted for elastic fluid pumps
    • F04D29/162—Sealings between pressure and suction sides especially adapted for elastic fluid pumps of a centrifugal flow wheel
    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • F04D29/282—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis
    • 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
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/601—Mounting; Assembling; Disassembling specially 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
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven

Definitions

  • the impeller In such a blower arrangement, the impeller generates a pressure difference, which leads to a negative pressure at the intake opening. This simultaneously results in an overpressure in the space extending between the impeller and the blower housing from the outer periphery of the impeller to the suction port of the blower housing.
  • the pressure difference between these two areas leads to the inevitable gap between the fan housing and the inner peripheral edge of the cover plate of the impeller to a backflow of a portion of the delivered air flow.
  • the loss of air flow due to the backflow significantly reduces the efficiency of the blower and, on the other hand, increases the temperature in the blower.
  • the invention is therefore based on the object to provide a fan assembly available that provides a simple way, an improved seal between impeller and blower housing with optimal smooth running.
  • the blower arrangement for a floor care appliance is characterized in that a peripheral, sealing ring is arranged in the bead at the suction opening, which sealingly surrounds a radially inner portion of the cover pane.
  • the material of the sealing ring such as polyurethane or polyurethane foam, is applied in the bead, which surrounds the intake opening of the fan cover circumferentially, so that there is a sealing ring with the dimensions of the bead.
  • the sealing ring is designed so that it hardens and can then be machined.
  • the milling of the cover plate in the sealing ring of PU or PUR foam takes place in such a way that there is a minimal gap between the cover plate and the sealing ring.
  • the milling is provided in an extremely simple manner in that the opening edge cover disk is provided with a contour which is designed for abrasion of the material of the sealing ring.
  • a sealing ring made of cured PU or PUR foam or a brittle plastic or a hard elastomer in the bead on the suction port allows an effective and permanent sealing of the gap between the impeller and the suction port of the fan shroud.
  • By milling the groove in the cured PU or PUR foam by means of the cover plate there is a minimal gap between the radially inner portion of the cover plate and the sealing ring, which is does not reseal due to elastic recovery of the sealing material.
  • the backflow occurring at the fan wheel of the delivered air volume is limited to a minimum and increases the efficiency of the fan to a significant extent.
  • the gap between the cover disc and sealing ring which is produced in the final assembled state of fan housing and fan cowl, also ensures a non-contact seal. This prevents abrasion or melting of the sealant during operation of the blower. In this way, disturbing noise or odor emissions can be excluded by the sealing ring.
  • Another advantage of the arrangement of a sealing ring made of cured PU or PUR foam or other, milled material consists in the balance of existing in a large-scale production tolerances between impeller and Gebläsehaube. Tolerances in relation to the impeller height or the alignment of the fan shroud to the axis of rotation of the impeller are circumvented by the milling of the cover plate in the sealing ring to the resulting end position and have no influence on the sealing function of the sealing ring. Each impeller mills its own individual groove without the need for intricate tolerance compensation or adjustment work.
  • a labyrinth seal is provided.
  • the surface contour causes within the groove an air flow, which forms transversely to the direction of the main flow generated by the blower and thus provides a kind of fluidic seal. In other words, the air flow within the groove increases the sealing effect again.
  • the sealing ring circumferentially has approximately the height of the bead.
  • the PU or PU foam is introduced into the bead at the intake opening so that the foam in the cured state has approximately the height of the bead wall, which faces the intake opening of the fan cover.
  • the PU or PUR foam is bordered on three sides by the walls of the bead in the fan cowl and is openly accessible only from the side facing the opening edge of the fan wheel.
  • the material of the sealing ring is selected so that the material properties, characterized by the above values, even after aging under the operating conditions in a floor care device with continuous vibration load and elevated temperatures remain. A loss of the sealing function of the sealing ring as a result of embrittlement or aging of the sealing material can be excluded.
  • Suitable is a material of the sealing ring, for example PU or polyurethane foam or an elastomer, which has a strength of about 0.2 to 2 N / mm 2 Shore hardness in the cured state.
  • the opening edge has a tooth-shaped contour.
  • the opening edge mills very quickly and precisely its groove in the sealing material when the impeller is pressed under pressure of the edge of the seal in rotation.
  • the opening edge has a sawtooth-shaped contour, which further optimizes the process of milling the groove.
  • the opening edge has a wavy contour, which causes a slower milling and is well suited for softer sealing material. Furthermore, blocking the rotation is avoided because the milling process is gentler.
  • the rotating impeller with a tooth-shaped edge mills gently and quickly during the process of pressing the Gebläsehaube in the relatively hard sealant, without exposing the wheel of increased axial force.
  • the Stge leopard tone ie wave peaks and Wellentrelier, the impeller mouth disappear after the milling process entirely within the sealant and cause no noise or vibration nor worsen the achievable efficiency compared to a solution without sawtooth.
  • the sealing material is removed during the pressing of the hood instead of displaced only. As a result, the friction of the impeller on the sealing material is significantly reduced, after a few seconds, the impeller is already running freely without additional friction and the associated losses. In addition, there is no stimulating mechanical contact with the static hood or the associated sealing material more.
  • the invention further relates to a device having a corresponding fan arrangement, for example a vacuum cleaner, extractor hood, tumble dryer or washer-dryer or a cooking appliance.
  • a device having a corresponding fan arrangement for example a vacuum cleaner, extractor hood, tumble dryer or washer-dryer or a cooking appliance.
  • FIG. 1 shows the sectional view of a fan assembly 10, in particular suitable for a vacuum cleaner.
  • the blower arrangement 10 shown has a blower housing 12, which is closed by a laterally arranged motor partition 50. Blower housing 12 and motor partition 50 are centered to each other. Centrally centered in the fan housing 12, a motor 14 is arranged, which drives a fan wheel 18 via a shaft 16.
  • the shaft 16 is rotatably mounted both in the fan housing 12 and in the motor partition 50.
  • the shaft 16 connects the motor 14 with an impeller 18 that is disposed on the motor 14 side facing away from the motor partition 50.
  • the impeller 18 is releasably but rotatably connected to the shaft 16.
  • the impeller 18 comprises a carrier disk 44, on the axially projecting conveying blades 38 are arranged. On the support plate 44 opposite side of the conveying blades 38, a cover plate 20 is placed. The cover plate 20 has centered on an opening. At the outer periphery of the impeller 18, the cover plate 20 is aligned approximately parallel to the carrier disk. In a radially inner portion of the impeller 18, the cover plate 20 is aligned approximately parallel to the axis of rotation of the impeller 18.
  • the impeller 18 is covered on the opposite side of the motor partition 50 by a fan cover 22.
  • the fan cover 22 is connectable to the fan housing 12 and / or the motor partition 50.
  • the fan shroud 12 has centered on a suction port 24. Circumferentially around this intake opening 24, a bead 26 is arranged in the fan shroud 12, which is open in the direction of the blower housing 12.
  • a sealing ring 28 for example made of a hard or brittle material, such as cured PU or PUR foam arranged.
  • FIG. 2 shows an enlarged section of the fan assembly 10, as in FIG. 1 shown.
  • the impeller 18 is connected to a shaft 16 which is driven by a motor 14, not shown.
  • the fan wheel 18 is bordered on the side facing away from the motor by a fan cover 22, which centered centrally has an intake opening 24.
  • the blower wheel 18 generates negative pressure which results at the suction opening 24 of the blower hood 22 in a suction air flow.
  • an overpressure arises on the outer circumference of the blower wheel 18 in the region between the cover disk 20 of the blower hood 22.
  • a sealing element 28 made of cured PU or PUR foam is arranged at the transition between the two areas.
  • the sealing element 28 For example, from cured PU or PUR foam, which is arranged in a circumferential bead 26 of the fan shroud 22, a backflow of suction air to the radially inner portion of the cover plate 20 around in the intake port 24 is prevented, or at least reduced.
  • FIG. 3 shows an enlarged view of the sealing element 28 made of a brittle or hard plastic material, such as cured PU or PUR foam, which sealingly separates the overpressure region 52 between cover plate 20 and Gebläsehaube 22 from the vacuum region 54 at the suction port 24 of the fan cover 22.
  • a sealing ring 28 Surrounding the suction opening 24 while a bead 26 is arranged, which is open only in the direction of the fan 18.
  • a sealing ring 28 is arranged, which approximates in its geometric extension approximately to the shape of the bead 26.
  • the height of the bead 26 is defined by the outer boundary of the bead 26, which delimits the bead 26 of the intake port 24 of the fan cover 22.
  • the arranged in the bead 26 sealing ring 28 of a brittle or hard plastic material is milled from the direction in which the bead is open, circumferentially through the radially inner portion of the cover plate 20 when the serrated edge 40 of the cover plate 20 pressed onto the sealing ring while the fan wheel 18 is briefly set in rotation.
  • This milled groove 36 has a depth T, which is greater than the height of the teeth 40.
  • the groove 36 is slightly wider and deeper milled out than the opening edge 34 protrudes there, resulting in the subsequent normal operation of the fan no friction between the opening edge and the seal 28 adjusts or results. This ensures the desired smooth running of the blower with optimum air flow.
  • FIG. 4 shows the impeller 18 as a single part.
  • the impeller 18 comprises a plurality of blades 38, curved, radial or tangential, which generate the predetermined air flow during rotation of the wheel 18.
  • the front side of the suction side is provided with a cover plate 20 having a conical rise with a central opening.
  • the opening edge 34 is in this case provided with a toothing 40, 42 in order to cause a milling in of the opening edge 34 in the material of the seal 28 when the blower motor.
  • the teeth 40 may according to one embodiment alternately outwardly and inwardly, ie radially to the center of the axis, be angled or interlaced to mill the groove 36 slightly wider than the sheet thickness of the cover plate. This ensures reliably that no grinding of the opening edge 34 adjusts to the seal 28 in the subsequent control operation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP17185430.0A 2016-09-08 2017-08-09 Systéme de ventilateur pour un appareil ménager, tel un aspirateur Active EP3293399B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016116829.7A DE102016116829A1 (de) 2016-09-08 2016-09-08 Gebläseanordnung für ein Haushaltgerät, wie Staubsauger

Publications (2)

Publication Number Publication Date
EP3293399A1 true EP3293399A1 (fr) 2018-03-14
EP3293399B1 EP3293399B1 (fr) 2019-05-15

Family

ID=59579437

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17185430.0A Active EP3293399B1 (fr) 2016-09-08 2017-08-09 Systéme de ventilateur pour un appareil ménager, tel un aspirateur

Country Status (3)

Country Link
EP (1) EP3293399B1 (fr)
DE (1) DE102016116829A1 (fr)
TR (1) TR201909155T4 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109654059A (zh) * 2018-12-29 2019-04-19 追创科技(苏州)有限公司 叶轮和电机
US20220042521A1 (en) * 2018-08-22 2022-02-10 Lg Electronics Inc. Fan motor and manufacturing method of the same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008057485A (ja) * 2006-09-01 2008-03-13 Sanyo Electric Co Ltd 電動送風機
JP2011247098A (ja) * 2010-05-24 2011-12-08 Sanyo Electric Co Ltd 電動送風機
JP2014190309A (ja) * 2013-03-28 2014-10-06 Panasonic Corp 天井埋込型空気調和機
EP2857693A1 (fr) * 2013-10-07 2015-04-08 Miele & Cie. KG Système de ventilateur pour un appareil d'entretien du sol

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19717154A1 (de) 1997-04-23 1998-10-29 Bosch Siemens Hausgeraete Gebläseanordnung
US6223524B1 (en) 1998-01-23 2001-05-01 Diversitech, Inc. Shrouds for gas turbine engines and methods for making the same
GB201116029D0 (en) 2011-09-16 2011-10-26 Rolls Royce Plc Abradable panel and method of forming the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008057485A (ja) * 2006-09-01 2008-03-13 Sanyo Electric Co Ltd 電動送風機
JP2011247098A (ja) * 2010-05-24 2011-12-08 Sanyo Electric Co Ltd 電動送風機
JP2014190309A (ja) * 2013-03-28 2014-10-06 Panasonic Corp 天井埋込型空気調和機
EP2857693A1 (fr) * 2013-10-07 2015-04-08 Miele & Cie. KG Système de ventilateur pour un appareil d'entretien du sol

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220042521A1 (en) * 2018-08-22 2022-02-10 Lg Electronics Inc. Fan motor and manufacturing method of the same
US11859639B2 (en) * 2018-08-22 2024-01-02 Lg Electronics Inc. Fan motor and manufacturing method of the same
CN109654059A (zh) * 2018-12-29 2019-04-19 追创科技(苏州)有限公司 叶轮和电机

Also Published As

Publication number Publication date
DE102016116829A1 (de) 2018-03-08
TR201909155T4 (tr) 2019-07-22
EP3293399B1 (fr) 2019-05-15

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