US20220136527A1 - Motorized fan unit for a motor vehicle - Google Patents

Motorized fan unit for a motor vehicle Download PDF

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Publication number
US20220136527A1
US20220136527A1 US17/433,408 US202017433408A US2022136527A1 US 20220136527 A1 US20220136527 A1 US 20220136527A1 US 202017433408 A US202017433408 A US 202017433408A US 2022136527 A1 US2022136527 A1 US 2022136527A1
Authority
US
United States
Prior art keywords
duct
fan unit
deflector
motorized fan
air 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.)
Abandoned
Application number
US17/433,408
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English (en)
Inventor
Ismaël Franco
Yoann MONOT
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 Systemes Thermiques SAS
Original Assignee
Valeo Systemes Thermiques SAS
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 Systemes Thermiques SAS filed Critical Valeo Systemes Thermiques SAS
Assigned to VALEO SYSTEMES THERMIQUES reassignment VALEO SYSTEMES THERMIQUES ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FRANCO, Ismaël, MONOT, Yoann
Publication of US20220136527A1 publication Critical patent/US20220136527A1/en
Abandoned legal-status Critical Current

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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
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5813—Cooling the control unit
    • 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
    • F04D17/08—Centrifugal pumps
    • F04D17/16—Centrifugal pumps for displacing without appreciable compression
    • 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
    • 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
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/46—Fluid-guiding means, e.g. diffusers adjustable
    • F04D29/462—Fluid-guiding means, e.g. diffusers adjustable 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
    • F04D29/5806—Cooling the drive system

Definitions

  • the subject matter of the invention is a motorized fan unit for a motor vehicle.
  • such a motorized fan unit forms part of a heating, ventilation and/or air conditioning device of the motor vehicle, which regulates the temperature of an air flow intended to supply the interior of the vehicle.
  • the motorized fan unit serves to make the air flow enter and circulate in the heating, ventilation and/or air conditioning device as far as outlet openings, where the air enters the vehicle interior.
  • the motorized fan unit in the known way comprises an electric motor, for example with brushes, on which an impeller is mounted to cause the air to move, and a device for controlling the electric motor, the electric motor control device comprising an electronic board.
  • the motorized fan unit is equipped with a duct for the cooling of the motor.
  • the electronic board is cooled in the main flow so as to avoid excessive heating of the electronic components borne by the electronic board.
  • the subject matter of the invention is a motorized fan unit for motor vehicle, comprising a motor, a fan for setting in motion an air flow and configured to be controlled by the motor, and a control module for controlling said motor, the control module comprising an electronic board, the motorized fan unit delimiting a first circulation duct for the air flow set in motion by the fan, referred to as the main duct, and a secondary air flow duct, referred to as cooling duct, configured to cool said electronic board of the control module, the cooling duct comprising an inlet equipped with a deflector for diverting part of the air flow set in motion by the fan into the cooling duct, the deflector being mounted with the ability to move according to a flow rate of air in the main duct in a direction for increasing the flow rate of air in the cooling duct with a velocity of the air flow in the main duct.
  • the flow rate of air in the cooling duct is adjusted according to the heat-dissipation requirements of the motorized fan unit, thereby ensuring sufficient cooling of the electronic board of the motorized fan unit in all circumstances.
  • a gradient along which the flow rate of air in the cooling duct increases as a function of the velocity of the air flow in the main duct is a strictly increasing gradient.
  • the deflector is positioned in the main duct, outside of the cooling duct.
  • the deflector is mounted with the ability to pivot.
  • an axis of pivoting of the deflector extends in a direction substantially orthogonal to a main direction of the air flow in the main air duct at the deflector.
  • the axis of pivoting of the deflector extends in a radial direction of the motorized fan unit.
  • the deflector comprises a curved deflection surface.
  • a radius of curvature of the deflection surface is such that a center of an associated osculating circle is positioned upstream of the deflector relative to the flow of the air in the main air duct.
  • the deflector is made from a flexible material.
  • the flexible material is an HPPE polymer.
  • the deflector is obtained by molding.
  • the motorized fan unit comprises at least one low wall extending in the main duct and bordering the inlet to the cooling duct.
  • the cooling duct is configured to also cool the motor.
  • Another subject of the invention is a heating, ventilation and/or air conditioning device for a motor vehicle, comprising a motorized fan unit as described above.
  • FIG. 1 is a perspective view of a motorized fan unit according to the present invention
  • FIG. 2 is another perspective view of the motorized fan unit of FIG. 1 ;
  • FIG. 3 is a partial schematic view of the motorized fan unit of FIG. 1 (with a fan being omitted);
  • FIG. 4 is a schematic curve of an air flow rate in a cooling duct of the motorized fan unit of FIG. 1 as a function of a velocity of a flow of air in the motorized fan unit.
  • a subject of the invention is a motorized fan unit for a motor vehicle, referenced 1 in the figures.
  • the motorized fan unit preferably forms part of a heating, ventilation and/or air conditioning device of the motor vehicle.
  • the motorized fan unit 1 comprises a motor 2 , a fan 3 and a control module 4 for controlling the motor 2 .
  • the fan 3 is controlled by the motor 2 and sets an air flow F in motion.
  • the fan 3 takes the form of an impeller wheel.
  • the control module 4 comprises an electronic board equipped with electronic components that it is necessary to cool in order to avoid any malfunctioning of the motorized fan unit.
  • the motorized fan unit 1 delimits two air circulation ducts: a first duct, referred to as the main duct, referenced 5 , and a second duct, referred to as the cooling duct, referenced 6 .
  • the air flow F is split into a main air flow F 1 circulating in the duct 5 , and a cooling air flow F 2 circulating in the duct 6 .
  • the cooling duct 6 is configured to cool the control module 4 and, in particular, the electronic board thereof.
  • the electronic board may potentially be fitted with a heat sink that the flow F 2 cools.
  • the duct 6 comprises an inlet 7 equipped with a deflector 8 to divert part of the air flow F (the flow F 2 ) into the cooling duct 6 .
  • the air inlet 7 extends in a plane substantially perpendicular to the axis of rotation of the electric motor 2 .
  • the cooling duct 6 constitutes a tapping off of the main duct 5 .
  • the cooling duct 6 branches off the main duct 5 .
  • the air flow F 2 flows around the control module, the electronic board and/or the heat sink, then circulates to the center of the motor and re-emerges via the impeller wheel 3 .
  • the duct 6 also provides cooling of the motor 2 .
  • the inlet 7 is an orifice bordered by a low boundary wall 9 into or beneath which the deflector 8 is inserted.
  • the deflector 8 is mounted with the ability to move according to a flow rate D(F 2 ) of air in the cooling duct 6 in a direction of increasing a flow rate D(F 2 ) of air in the cooling duct 6 with a velocity v(F) of the air flow F in the main duct (upstream of the cooling duct 6 ), as will be detailed in connection with FIG. 4 .
  • a gradient along which the flow rate of air in the cooling duct increases as a function of the velocity of the air flow in the main duct is a strictly increasing gradient.
  • the curve of the flow rate of air in the cooling duct as a function of the velocity of the air flow in the main duct is of substantially parabolic shape, as will be detailed later.
  • the deflector 8 is positioned in the main duct 5 , outside of the cooling duct 6 .
  • This configuration provides a simple way of bleeding the air flow F 2 off from the duct 5 .
  • the deflector 8 is mounted with the ability to pivot, an axis of pivoting P of the deflector 8 extending in a direction substantially orthogonal to a main direction of the air flow F 1 in the main air duct 5 at the deflector 8 .
  • the axis of pivoting P extends in a radial direction. This configuration ensures that the air flow F 2 enters the cooling duct 6 without turbulence.
  • the axis of pivoting P passes through the point C schematically indicating the position of the axis of rotation of the electric motor 2 in FIG. 3 .
  • the deflector 8 comprises a deflection surface 10 via which the air flow F 2 is diverted into the inlet 7 of the cooling duct 6 .
  • the deflection surface 10 is curved and extends from the axis of pivoting P into the duct 5 .
  • the radius of curvature of the surface 10 is such that the center of the osculating circle is positioned upstream of the deflector 8 relative to the flow of the air.
  • the dimensions of the surface 10 are chosen according to the power of the control module 4 .
  • the deflector 8 and particularly the deflection surface 10 , is made from a flexible material, notably an HPPE polymer or SEBS, so as to ensure that the flow rate of air in the duct 6 adjusts according to the velocity of the air flow F.
  • a flexible material notably an HPPE polymer or SEBS
  • the deflector 8 is obtained by molding or overmolding.
  • the flexibility of the deflector 8 ensures that the flow rate of air F 2 in the duct 6 increases with the velocity of the air F. Simulations performed by the Applicant have demonstrated that the flow rate (denoted D in FIG. 4 ) of air in the duct 6 is a substantially parabolic function of the velocity (denoted v in FIG. 4 ) in the duct 5 upstream of the inlet 7 .
  • the deflection surface 10 has a tendency to lie close to the inlet 7 and only a small proportion of the air flow F is diverted into the duct 6 .
  • the flow rate D in the duct 6 is therefore low. In other words, the deflection surface 10 opens the inlet 7 only very little.
  • the apparent surface area (namely that portion of the surface 10 that fronts onto the air flow F) exhibited by the deflector 8 is low, thereby improving the aeraulics and the acoustics of the motorized fan unit.
  • the deflection surface 10 lifts, and this increases the apparent surface area of the deflector in the air flow. In consequence, the flow rate D of the air flow F 2 in the duct 6 increases. The position of the deflector 8 changes progressively with the increase in the velocity of the air flow F.
  • the deflector 8 is bordered by a low wall extending in a plane perpendicular to the plane of the air inlet 7 and also perpendicular to the axis of pivoting P visible in FIG. 3 .
  • the low wall is situated radially on the side of the inlet 7 that is furthest from the electric motor 2 .
  • the low wall is able to limit the extent to which air escapes between the lateral edge of the deflector 8 and the edge of the air inlet 7 .
  • the deflector 8 comprises a vertical portion bordering the lateral edge of the deflector and perpendicular to the deflection surface 10 . This vertical portion performs a similar role to the low wall and thus is able to limit the extent to which air escapes between the deflector 8 and the edge of the air inlet 7 .
  • the substantially parabolic behavior of the flow rate D is particularly beneficial insofar as the heat dissipation requirements of the control module and of the motor themselves likewise vary in that same way.
  • the solutions known from the prior art propose a flow rate that at best varies as a linear function of the velocity of the air flow F, and this increases the pressure drop at nominal velocity.
  • the deflector 8 offers the same apparent surface area as the linear solution. Below the maximum velocity, the deflector offers a surface area that is smaller than that of the known, fixed-geometry, solutions.
  • the deflector 8 represents a simple-to-implement and effective means for cooling the control module and the motor of the motorized fan unit.

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)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
US17/433,408 2019-02-25 2020-01-22 Motorized fan unit for a motor vehicle Abandoned US20220136527A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR1901920 2019-02-25
FR1901920A FR3093141B1 (fr) 2019-02-25 2019-02-25 Groupe moto-ventilateur pour vehicule automobile
PCT/FR2020/050086 WO2020174135A1 (fr) 2019-02-25 2020-01-22 Groupe moto-ventilateur pour vehicule automobile

Publications (1)

Publication Number Publication Date
US20220136527A1 true US20220136527A1 (en) 2022-05-05

Family

ID=67107810

Family Applications (1)

Application Number Title Priority Date Filing Date
US17/433,408 Abandoned US20220136527A1 (en) 2019-02-25 2020-01-22 Motorized fan unit for a motor vehicle

Country Status (5)

Country Link
US (1) US20220136527A1 (zh)
EP (1) EP3931448A1 (zh)
CN (1) CN113439164A (zh)
FR (1) FR3093141B1 (zh)
WO (1) WO2020174135A1 (zh)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2932444A (en) * 1957-09-13 1960-04-12 Spencer Turbine Co Blower
US4749338A (en) * 1984-12-21 1988-06-07 Webasto-Werk W. Baier Gmbh & Co. Side channel blower
US5281375A (en) * 1989-06-21 1994-01-25 Stefan Konermann Process and device for producing bubble-film
US5284025A (en) * 1991-06-17 1994-02-08 Matsushita Electric Industrial Co., Ltd. Air conditioning apparatus for an electrically-powered motor vehicle
US20190226495A1 (en) * 2016-12-05 2019-07-25 Nidec Copal Electronics Corporation Blower device

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3777765B2 (ja) * 1997-12-16 2006-05-24 松下電器産業株式会社 電動送風機及びそれを用いた電気掃除機
DE202005004274U1 (de) * 2005-03-14 2006-07-27 Ebm-Papst Landshut Gmbh Elektromotorisch angetriebenes Radialgebläse mit IC
DE102005046180B3 (de) * 2005-09-27 2007-03-22 Siemens Ag Lüftermodul
DE102005050685A1 (de) * 2005-10-20 2007-05-03 Behr Gmbh & Co. Kg Vorrichtung zur Förderung eines Kühlluftstromes
TW200845880A (en) * 2007-05-14 2008-11-16 Sunonwealth Electr Mach Ind Co Cooling structure of fan motor
US8491277B2 (en) * 2010-02-12 2013-07-23 Ebara Corporation Submersible motor pump, motor pump, and tandem mechanical seal
FR2984810B1 (fr) * 2011-12-23 2015-06-19 Valeo Systemes Thermiques Dispositif de refroidissement par air d'un pulseur pour appareil de chauffage, de ventilation et de climatisation
US9456706B2 (en) * 2012-02-17 2016-10-04 Hussmann Corporation Merchandiser with airflow divider
CN206071920U (zh) * 2016-09-26 2017-04-05 南京磁谷科技有限公司 一种无风扇回流式风冷鼓风机

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2932444A (en) * 1957-09-13 1960-04-12 Spencer Turbine Co Blower
US4749338A (en) * 1984-12-21 1988-06-07 Webasto-Werk W. Baier Gmbh & Co. Side channel blower
US5281375A (en) * 1989-06-21 1994-01-25 Stefan Konermann Process and device for producing bubble-film
US5284025A (en) * 1991-06-17 1994-02-08 Matsushita Electric Industrial Co., Ltd. Air conditioning apparatus for an electrically-powered motor vehicle
US20190226495A1 (en) * 2016-12-05 2019-07-25 Nidec Copal Electronics Corporation Blower device

Also Published As

Publication number Publication date
FR3093141B1 (fr) 2021-01-22
WO2020174135A1 (fr) 2020-09-03
FR3093141A1 (fr) 2020-08-28
CN113439164A (zh) 2021-09-24
EP3931448A1 (fr) 2022-01-05

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