WO2012163384A1 - Refroidissement de moteur de ventilateur - Google Patents

Refroidissement de moteur de ventilateur Download PDF

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Publication number
WO2012163384A1
WO2012163384A1 PCT/EP2011/054342 EP2011054342W WO2012163384A1 WO 2012163384 A1 WO2012163384 A1 WO 2012163384A1 EP 2011054342 W EP2011054342 W EP 2011054342W WO 2012163384 A1 WO2012163384 A1 WO 2012163384A1
Authority
WO
WIPO (PCT)
Prior art keywords
volume
motor
air
pressure
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.)
Ceased
Application number
PCT/EP2011/054342
Other languages
English (en)
Inventor
Bodo Gesell
Marius Gorchs
Mark Sondermann
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.)
Valeo Klimasysteme GmbH
Original Assignee
Valeo Klimasysteme GmbH
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 Valeo Klimasysteme GmbH filed Critical Valeo Klimasysteme GmbH
Priority to PCT/EP2011/054342 priority Critical patent/WO2012163384A1/fr
Publication of WO2012163384A1 publication Critical patent/WO2012163384A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F04D25/082—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit having provision for cooling the motor
    • 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
    • F04D29/5806—Cooling the drive system

Definitions

  • the present invention relates to a fan, and in particular to a fan for a heating, ventilation and/or air-conditioning system of a vehicle.
  • Conventional fans of this type comprise a housing which is usually produced from plastic and which is conventionally also referred to as a spiral housing. Situated in the housing is an electric motor which drives an impeller in order to increase the pressure of air.
  • the air originating for example from a fresh air / recirculated air discharge device, conventionally passes via an air filter to a suction-side volume, from where said air is pressurized by means of the impeller in a pressure-increasing volume before subsequently being discharged to a pressure-side volume.
  • the fan is conventionally held in a motor volume of the housing, usually in such a way that the motor comes to rest below the impeller.
  • the motor of the fan is not adequately cooled. Furthermore, the applicant has observed that metal particles released from the motor can have an adverse effect on the downstream elements of the heating and air-conditioning system, such as the heat exchanger and the evaporator, and can in particular lead to early corrosion therein.
  • a fan in particular for a heating, ventilation and/or air-conditioning system of a vehicle, comprising a housing, an electric motor which drives an impeller in order to increase the pressure of air from a suction-side volume in a pressure-increasing volume and discharge said air to a pressure-side volume, with the electric motor being accommodated in a motor volume of the housing, is improved in that the housing comprises an air guiding section which connects the motor volume to the suction-side volume while bypassing the pressure-increasing volume.
  • the air which is used for cooling the electric motor is no longer supplied, or is at least supplied only to a considerably reduced extent, to the pressure-increasing volume, but rather said air is conducted in a specific duct to the suction-side volume of the fan, or is sucked into said volume by means of the relatively low pressure prevailing there.
  • the housing comprises a further air guiding section which connects the pressure-side volume to the motor volume while bypassing the pressure-increasing volume, in order thereby to be able to utilize the entire pressure difference
  • the electric motor it is alternatively likewise possible for the electric motor to be cooled only by means of the suction action of the suction side, by virtue of for example ambient air or else air from the pressure-increasing volume being sucked into the motor volume, in order for said air to be used in an effective manner for cooling the electric motor, and subsequently conducted back to the suction-side volume.
  • the housing itself comprises a wall which serves as a partition between the motor volume and the pressure-increasing volume, for example a wall which is substantially matched to the configuration of the impeller.
  • the impeller it is likewise possible in this configuration for the impeller to be designed in the manner of a screen in the region of the rotary axle, such that an at least partial overlap is provided with the wall arranged therebelow.
  • a particularly advantageous embodiment is provided, however, if the impeller itself at least partially defines the motor volume. If a closed impeller is provided, for example having a closed cone which connects the rotary axle to the blades of the impeller. In this embodiment, the infiltration of moisture and dirt is prevented in an effective manner, and a closed impeller, despite the fact that it is less desirable from a weight aspect, offers the advantage of providing high stability and connection rigidity.
  • the impeller To firstly as far as possible prevent any exchange of air between the motor volume and the pressure-increasing volume and secondly prevent the infiltration of liquid and/or dirt into the motor volume, it is preferable for the impeller to form a continuation, via a sealing device, with respect to at least one further wall which at least partially defines the motor volume.
  • a sealing device consideration is given in particular to so-called labyrinth seals, because the seal must permit high rotational speeds and should also provide adequate production tolerances.
  • the impeller in particular in the situation in which the impeller at least partially defines the motor volume, but not exclusively in this situation, it is advantageous for the impeller to have aerodynamically acting elements on the side facing toward the motor.
  • Said aerodynamically acting elements may for example be air guiding blades which, when the impeller rotates, favour a flow through the electric motor, wherein the aerodynamic elements could also be designed so as to assist the air circulation effected by the pressure difference.
  • the impeller is provided with a closed surface, for example in the form of a cone which is rotationally symmetrical with respect to the rotary axle and which widens toward the electric motor and which particularly preferably has, at its base, a radius which is considerably greater than the radius of the electric motor.
  • the closed surface can therefore, in the manner of a rotating screen, protect the electric motor from infiltrating moisture and/or dirt.
  • At least one air guiding section advantageously comprises a filter.
  • a drainage device is additionally provided, in particular in order to allow any liquid which arises to be discharged from the pressure-increasing volume without the risk of contamination of the motor volume.
  • the motor volume is designed so as to favour a flow through the motor.
  • the base wall of the housing it would for example be possible for the base wall of the housing to be specially shaped or else to comprise air guiding elements which, for effective cooling of the electric motor, conduct the air along the motor axle, wherein a person skilled in the art will understand that even spiral air guidance through the electric motor may be provided.
  • the fan according to the invention comprises a metal particle separating device.
  • a metal particle separating device which is capable of separating metal particles, consideration is given in particular to a specially provided turbulence chamber, a specific filter or else a magnet device.
  • Metal separation has proven to be particularly advantageous in particular for preventing copper particles, which are released during the operation of the electric motor, from reaching the evaporator, because the latter would otherwise be at increased risk of corrosion.
  • the solution according to the invention as an alternative or else in addition to the previous treatment of air for cooling the electric motor by means of pressurized air from the pressure side of the fan, is aimed predominantly at sucking air from the motor volume to the suction-side volume such that practically no air passes from the motor volume into the pressure-increasing volume, which, aside from the advantages already described, also has the advantage that the pressure increase in the pressure-increasing volume can take place without parasitic flows, since the pressure-increasing volume receives air practically exclusively from the suction side, and discharges said air practically entirely to the pressure-side volume.
  • Figure 1 shows a schematic plan view of the spiral housing of a fan according to the invention.
  • Figure 2 shows a schematic sectional view of a first preferred embodiment of a fan according to the invention.
  • Figure 3 shows an embodiment slightly modified in relation to Figure 2.
  • Figure 4 shows an alternative embodiment in a schematic sectional view similar to Figures 2 and 3.
  • Figure 5 shows yet a further preferred embodiment in a similar illustration.
  • Figure 6 shows a further preferred embodiment of a fan according to the invention, again in a schematic sectional view.
  • Figure 7 shows yet a further preferred embodiment, in which in particular the flow through the motor to be cooled is favoured.
  • FIG. 1 shows a schematic plan view of a fan for a heating, ventilation and/or air-conditioning system of a vehicle.
  • the fan comprises a housing 10, which is conventionally an injection-moulded part and which is often also referred to as a spiral housing on account of its geometric shape.
  • An impeller 20 is rotatably arranged in the housing 10, as indicated by the arrow.
  • the impeller 20 is provided with peripheral blades (not illustrated), such that air passing centrally from above is accelerated radially outward via a suction-side volume 2 before being pressurized and accelerated in a pressure-increasing volume 4 by the rotation of the impeller, before finally leaving the fan via the pressure-side volume 6 as indicated by a double arrow.
  • This design is entirely conventional and is well known to a person skilled in the art, as is the fact that an electric motor is situated below the fan impeller 20 in order to drive the impeller.
  • FIG. 2 shows a schematic sectional view of a first embodiment of a fan according to the invention. Also shown in the sectional view are the housing 10 in which is situated the impeller 20 for discharging air from the suction-side volume 2 via the pressure-increasing volume 4 to the pressure-side volume 6.
  • an air filter 17 is situated upstream of the impeller, and an electric motor 30 provided for driving the impeller 20 is situated below the impeller.
  • the motor 30 is situated in a motor volume 8 which, at its underside, is formed by the housing wall of the housing 10.
  • the housing 10 comprises, below the impeller, substantially horizontally-running wall sections 1 1 , 13, with the wall section 13 in particular defining the upper part of the motor volume 8.
  • the underside of the impeller 20 is formed with a closed, continuous base wall 22 which is angled similarly to the wall sections 1 1 , 13.
  • the motor volume 8 is connected to the suction-side volume 2 via an air guiding section 12, such that air which is heated by the motor 30 is not conducted back to the impeller from below, as is conventional in the prior art, but rather is conducted back to the suction-side volume while bypassing the pressure-increasing volume 4, as indicated by the double arrows.
  • the air which is heated by the motor 30 is discharged upstream of the air filter 17, with a filter element 16 additionally being provided, as a result of which it would likewise be possible for the air heated by the motor to be supplied to the suction-side volume downstream of the air filter 17.
  • a part of the air from the pressure-increasing volume and the pressure-side volume 4, 6 is conducted via an air guiding section 14 to the motor 30, as indicated by a double arrow in the drawing.
  • the overall result is a circulation of air which can cool the motor 30 in a suitable way, wherein as is shown, the air circulation bypasses the volume of the impeller, that is to say in particular the pressure-increasing volume.
  • the motor 30 is also protected in an effective manner from infiltrating dirt and infiltrating moisture both by the closed impeller base surface 22 and also by the wall sections 1 1 , 13, which provides an additional advantage.
  • the impeller 20 should advantageously be of sealed design with respect to an axle 35 which is driven by the motor 30.
  • the construction is substantially identical to that in Figure 2, wherein however the air guiding section 14 via which pressurized air is supplied to the electric motor is designed explicitly as a duct formed by wall sections 15 and 17, such that the air supplied to the motor is extracted directly in the transition region between the pressure-increasing volume 4 and the pressure-side volume 6.
  • the air mass flow is set in an effective manner, wherein by means of the duct-like design of the air guiding section 14 it is likewise possible in an effective manner to prevent moisture and/or dirt from being able to pass into the motor volume.
  • FIG. 4 illustrates a further design variant, wherein in particular the partial elements illustrated here and indicated by the reference numerals 24 and 26 may likewise be used, as described below, in all the other embodiments described above and below.
  • the impeller is provided with a closed, continuous wall 22 which, in the embodiment shown, comprises a truncated cone and a peripherally encircling surface, wherein the surface could also be of conical design overall.
  • a double-walled design in the region of the motor volume as in the preceding embodiments by means of the wall sections 1 1 and the impeller base 22 is not realized here, such that the unit as a whole can be of more lightweight design, and production by injection moulding is also made simpler.
  • the motor volume is defined substantially by the housing wall and the base wall 22 of the impeller.
  • a special feature of the design variant illustrated here is a sealing device indicated by the reference numeral 24.
  • said sealing device is a so-called labyrinth seal which permits a high rotational speed of the impeller and nevertheless prevents air from being able to pass out of the motor volume and back into the pressure-increasing volume, because it is desirable according to the invention for the air heated by the motor to be conducted to the suction-side volume.
  • the base wall 22 of the impeller is a continuous closed surface, no water can pass to the motor, and instead, as a result of the rotational force and as a result of the conical configuration of the base wall, any water which enters is transported by the impeller base 22 outward, from where the water can be discharged by means of a drainage device to a drainage system which may be provided in the vehicle.
  • Figure 5 shows a further preferred embodiment of a fan according to the invention, wherein as in the design variant according to Figure 4, a sealing device 24 is likewise provided, which sealing device is however arranged at the peripheral edge in the design variant illustrated here, wherein it would likewise be possible for the seal to be provided between the impeller and a wall which delimits the pressure- increasing volume in radial extent, in contrast to the axial extent illustrated here, in which the projections which form the labyrinth seal extend parallel to the drive axle of the electric motor.
  • two projections are provided on the impeller and one projection is provided on the wall.
  • the design variant illustrated here comprises a separating device, in particular a metal particle separating device 38.
  • this is a baffle in which air, which could for example contain metal particles resulting from abrasion in the electric motor, is conducted in the manner of a cyclotron separator, such that the metal particles can be separated there.
  • a cyclotron separator such that the metal particles can be separated there.
  • a permanent magnet or other suitable metal separating devices it would likewise be possible for a permanent magnet or other suitable metal separating devices to be provided here.
  • Figures 6 and 7 illustrate two further preferred embodiments, in which special refinements have been made in order to be able to further improve the flow around or through the motor, and therefore the cooling performance.
  • further aerodynamically acting elements 28 have been formed in particular on the underside of the impeller, such that as the impeller rotates, the existing air circulation can be assisted, wherein it is also made possible for air to be targetedly directed towards the motor.
  • a housing wall 19 is formed at one side to set the air circulation from the transition region between pressure-conducting volume and pressure-side volume via the air guiding section 14 to the motor volume 8 and onward via the air guiding section 12 to the suction-side volume 2, by means of which housing wall 19 the desired proportion of pressurized air can be conducted to the motor such that a suitable flow around or through the electric motor can be ensured by means of adjustments of a pressure-side air pressurization in conjunction with the suction-side action which is essential here.
  • the housing wall 36 is aerodynamically designed so as to deflect the circulating motor cooling air such that the major part of the air flows through the electric motor. It should be noted that a wide variety of means which are familiar to a person skilled in the art may likewise be used, such as the specially shaped wall, in particular an air guiding element, baffle or the like.
  • the particularly advantageous design of the motor volume which is closed off at the top additionally has an advantageous effect in that the electric motor can be protected in an effective manner from infiltrating dirt or moisture.
  • the configuration according to the invention is also advantageous in that flow optimization is possible, because less turbulence occurs in the pressure-increasing volume since it is no longer possible, as was the case previously, for the air which is used for cooling the motor to pass directly into the pressure-increasing volume or the volume of the impeller.

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  • 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)

Abstract

La présente invention se rapporte à un ventilateur, destiné en particulier à un système de chauffage, ventilation et/ou conditionnement d'air d'un véhicule, comprenant un carter(10), un moteur électrique (30) qui entraîne une roue (20) afin d'augmenter la pression d'air depuis un volume côté aspiration (2) dans un volume augmentation de pression (4) et d'évacuer ledit air vers un volume côté pression (6), le moteur électrique (30) étant logé dans un volume moteur (8) du carter. Le ventilateur se caractérise en ce que le carter (10) comprend une section guidage d'air (12) qui relie le volume moteur (8) au volume côté aspiration (2) tout en contournant le volume augmentation de pression (4).
PCT/EP2011/054342 2011-05-30 2011-05-30 Refroidissement de moteur de ventilateur Ceased WO2012163384A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2011/054342 WO2012163384A1 (fr) 2011-05-30 2011-05-30 Refroidissement de moteur de ventilateur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2011/054342 WO2012163384A1 (fr) 2011-05-30 2011-05-30 Refroidissement de moteur de ventilateur

Publications (1)

Publication Number Publication Date
WO2012163384A1 true WO2012163384A1 (fr) 2012-12-06

Family

ID=43971017

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/054342 Ceased WO2012163384A1 (fr) 2011-05-30 2011-05-30 Refroidissement de moteur de ventilateur

Country Status (1)

Country Link
WO (1) WO2012163384A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116335970A (zh) * 2023-04-26 2023-06-27 南通大通宝富风机有限公司 一种蒸汽压缩机

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4574210A (en) * 1983-07-07 1986-03-04 Wilhelm Gebhardt Gmbh External rotor motor having a cooling system
DE3708040A1 (de) * 1987-03-12 1988-09-22 Ziehl Abegg Gmbh & Co Kg Motorluefterrad mit kegelfoermigem luftstrom
US20070080590A1 (en) * 2005-10-11 2007-04-12 Vinson Wade D Cooling fan with motor cooler
US20070152519A1 (en) * 2005-12-29 2007-07-05 Minebea Co., Ltd. Blade and yoke arrangement for cooling stator windings
EP1843449A1 (fr) * 2006-04-07 2007-10-10 General Electric Company Motoeur d'un compresseur comprenant un rotor aux aimants permanents pour le transport d'un fluide dans une pipeline
FR2910079A1 (fr) * 2006-12-18 2008-06-20 Airfan Soc Par Actions Simplif Appareil de delivrance de gaz,notamment d'assistance respiratoire,a chambre intermediaire de collecte de fuite d'oxygene.

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4574210A (en) * 1983-07-07 1986-03-04 Wilhelm Gebhardt Gmbh External rotor motor having a cooling system
DE3708040A1 (de) * 1987-03-12 1988-09-22 Ziehl Abegg Gmbh & Co Kg Motorluefterrad mit kegelfoermigem luftstrom
US20070080590A1 (en) * 2005-10-11 2007-04-12 Vinson Wade D Cooling fan with motor cooler
US20070152519A1 (en) * 2005-12-29 2007-07-05 Minebea Co., Ltd. Blade and yoke arrangement for cooling stator windings
EP1843449A1 (fr) * 2006-04-07 2007-10-10 General Electric Company Motoeur d'un compresseur comprenant un rotor aux aimants permanents pour le transport d'un fluide dans une pipeline
FR2910079A1 (fr) * 2006-12-18 2008-06-20 Airfan Soc Par Actions Simplif Appareil de delivrance de gaz,notamment d'assistance respiratoire,a chambre intermediaire de collecte de fuite d'oxygene.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116335970A (zh) * 2023-04-26 2023-06-27 南通大通宝富风机有限公司 一种蒸汽压缩机
CN116335970B (zh) * 2023-04-26 2025-08-15 南通大通宝富风机有限公司 一种蒸汽压缩机

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