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
  • F04D29/40—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
  • F04D29/526—Details of the casing section radially opposing blade tips
• • 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
  • 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
  • F04D29/40—Casings; Connections of working fluid
  • F04D29/52—Casings; Connections of working fluid for axial pumps
  • F04D29/54—Fluid-guiding means, e.g. diffusers
  • F04D29/541—Specially adapted for elastic fluid pumps
  • F04D29/545—Ducts
• • 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 actuated by an incorporated motor, also called motoventilateur.
• the motor is controlled by an electronic control device.
• the electronic control device is arranged in the extension of the engine, at the rear of it.
• the electronic control device is then exposed to the air flow generated by the rotation of the fan, this air flow can be hot and reach a temperature of 70 0 C for example, depending on the applications. In the same way, engine warming is transmitted to the electronic control device. These two points can limit the reliability and performance of the electronic control device.
• No. 5,615,999 discloses a fan comprising a ferrule on which is fixed a device for controlling the motor.
• EP 1 712 799 discloses a fan for mounting on a printed circuit board. There is a need to further improve the motor fans, in particular to benefit from a motor fan of reduced axial size and reliable operation.
• the invention aims to meet this need and achieves it through a motor fan comprising: a ferrule, a drive motor, a rotating assembly, comprising at least one blade, rotated by the motor so as to create a flow of air inside the shell, an electronic engine control device, the fan can be characterized in that the electronic control device is disposed at least partially, better fully on the ferrule.
• the electronic control device is for example disposed on a tubular wall of the ferrule.
• the electronic engine control device is placed outside the main airflow generated by the rotation of the blades, which improves reliability and reliability. performance.
• the electronic control device is not thermally linked to the motor, which prevents it from heating up in contact with the latter.
• the invention may also allow to benefit from a more compact axial fan, which may be advantageous for transport or packaging.
• the ferrule can act as a radiator and contribute to cooling by conduction of the electronic control device.
• the electronic control device is for example disposed on the shell occupying substantially the same axial position as the blades.
• the electronic control device is preferably attached to the radially outer side of the ferrule.
• the main air flow downstream of the fan can induce a suction of the ambient air on the periphery of the fan and the placement of the electronic control device on the radially outer side of the ferrule can allow its cooling by forced convection.
• the shell may have, on its radially inner side, a symmetrical surface of revolution, for example generally cylindrical in revolution, of the same axis as the axis of rotation of the rotating assembly.
• the ferrule extends for example axially on either side of the rotating assembly.
• the shell may extend axially beyond the electronic control device, on the side of the air inlet in the fan.
• the electronic control device may be closer to the axial end of the shell corresponding to the air outlet than that corresponding to the air inlet. This can further improve the cooling of the electronic control device by the ambient air.
• the ferrule is for example made of metal, for example steel. The choice of a metal and in particular of steel can favor cooling by conduction.
• the rotating assembly can be entirely contained in the ferrule.
• the motor fan may comprise a baffle for channeling the ambient air flow outside the motor fan, induced by the main air flow out of the motor fan, to the control device, to further improve convection cooling.
• the electronic control device may comprise semiconductor electronic components, and exert for example a variable speed drive function.
• the electronic control device may comprise an electronic control circuit at least partially embedded in a thermal conductive resin.
• the electronic control device can be connected to the motor by a plug-in connection system.
• the plug-in connection system comprises for example a connector disposed on a lateral surface of the motor.
• the motor is for example a brushless direct current motor, more commonly known as a brushless motor.
• the engine delivers for example a power of between 0.1 kW and 7.5 kW.
• the device may comprise a radiator for evacuating the heat generated by at least one electronic component of the control device, this radiator being fixed on the shell.
• the radiator is for example directly attached to the shell.
• the radiator may include cooling fins oriented parallel to the axis of rotation.
• the radiator is indirectly attached to the shell, being for example worn the control device, the latter being fixed on the shell.
• the radiator is for example in the form of cooling fins carried by an outer surface of the control device.
• the motor is for example supported by a grid integral with the ferrule, in particular reported thereon.
• the motor can extend axially on both sides of the grid.
• the electronic control device may comprise on its radially outermost side, fins oriented transversely to the axis of rotation.
• the control device may extend axially recessed from the front and rear axial ends of the shell.
• the rotating assembly rotates for example entirely inside the shell.
• FIGS. 1 and 2 are front and rear views of a motor fan according to a first example of implementation of the invention
• Figure 3 shows more particularly the electronic control device
• Figures 4 and 5 are schematic representations, in axial section, of Examples of motor fans according to the invention
• - Figures 6 and 7 show a motor fan according to another example of implementation of the invention.
• FIGS. 1 and 2 show a motovilter 1 according to a first example of implementation of the invention.
• This motor-fan 1 comprises a rotating assembly comprising a hub 3 supporting a plurality of flanges 4 to which blades 5 are fixed.
• the rotating assembly 2 is for example similar to that disclosed by the application EP 1 571 345 of the applicant.
• the motor-fan 1 comprises a ferrule 7 inside which rotates the rotating assembly 2, about an axis of rotation X.
• the ferrule 7 has for example a radially inner surface of revolution, of diameter adapted to that of the rotating assembly 2. This surface may be defined by a wall having a cylindrical portion X-axis revolution, which forms an air guide.
• the ferrule 7 may have an opening formed by the curvature, radially outwardly, of this wall of the ferrule 7, to define a suction lobe.
• the ferrule 7 may comprise at the front and rear flanges, which may be in one piece with the aforementioned wall.
• the motor fan 1 can be attached to any structure intended to support it, for example in an opening through a partition or on a frame, by different types of attachment.
• the ferrule 7 is integral with a cradle.
• the front flange of the shell is attached to a partition.
• the invention is not limited to a ferrule such as that illustrated.
• the blades 5 extend axially beyond the ferrule.
• the ferrule 7 may be an independent part attached to a frame or a partition, for example a wall of a box containing a heat exchanger, this partition defining for example the roof or a side of this box.
• the shell 7 may be formed in whole or in part by a partition, for example through a stamping thereof.
• the ferrule 7 is in the illustrated example made of metal, for example steel.
• the ferrule may be aluminum or a synthetic or composite material.
• the motorcycle fan 1 comprises a central motor 9, driving in rotation the rotating assembly.
• the motor is a brushless motor.
• the motor could alternatively be an asynchronous motor or DC brushed.
• the engine 9 is supported by a grid 23 disposed at the rear of the fan motor 1, this grid 23 being fixed on the shell 7.
• the grid 23 may have sufficiently fine mesh to protect people against the danger associated with the rotation of the blades 5.
• the fan motor 1 comprises a control device 10 of the motor 9, arranged in the example described on a radially outer surface 8 of the ferrule 7.
• the control device 10 and the motor 9 are advantageously connected by a plug-in connection system 12.
• the latter may comprise a connector disposed on a lateral surface of the motor 9, on a portion of the motor extending behind the gate 23.
• a cable can connect this connector to the electronic device 10.
• the electronic control device 10 may comprise one or more electronic power switches, semiconductor, and provide a variable speed drive function.
• the electronic control device 10 can also generate the rotating field to the stator, to drive the rotor in rotation.
• the electronic control device 10 may comprise an electronic circuit comprising the aforementioned electronic switch (s) and one or more radiators (13) for evacuating the heat generated by these components.
• the electronic control device 10 can be fixed on the shell 7 by means of such a radiator 13 or by means of any other support of the electronic circuit.
• the shell 7 is made with a radially extending wall which replaces the radiator 13 or on which the electronic circuit is fixed.
• At least a portion of the electronic components of the electronic device 10, or all of them, may be coated with an electrical insulating resin but thermally conductive, for example an epoxy resin.
• the electronic device 10 may comprise a housing which at least partially covers the electronic circuit and which can house a terminal block for the electrical connection of the motor fan.
• the radiator 13 may comprise, as illustrated, fins 100 oriented substantially parallel to the axis X of rotation, the radiator 13 extending in the illustrated example substantially perpendicular to the underlying wall of the ferrule 7.
• the electronic device 10 may also comprise on its radially outermost side, fins 110 oriented transversely to the axis X.
• the radiator is integrated in the electronic device 10, the latter being fixed directly on the shell 7.
• Cooling fins 200 and 210 are carried by the housing of the electronic device 10, in the example described.
• the fins 200 oriented substantially parallel to the axis of rotation X are for example carried by a face 15 of the housing facing the shell 7 and the fins 210 oriented transversely to the axis X are for example carried by side faces 16 of the case.
• the main hot air flow F downstream of the fan 1 tends to create a secondary suction flow F 'of the ambient air, at the periphery of the motor fan 1.
• the control device 10 is advantageously positioned on the shell 7 so as to be scanned by this flow F '.
• the electronic device 10 may in particular be positioned axially so as to be closer to the axial end 7b of the shell corresponding to the air outlet than to the axial end 7a corresponding to the inlet.
• the motorcycle fan is provided with at least one deflector 16, for example two baffles 16, which are advantageously arranged on the control device 10 so as to channel the flow of ambient air F ' to the control device 10, which can further improve the convection cooling.
• the deflector (s) 16 may be carried by the ferrule 7.
• control device 10 is disposed on the radially outer surface 8 of the shell 7, and is superposed axially at least partially on the rotating assembly 2.
• the invention is of course not limited to such examples, and the positioning of the device 10 could be other.

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)

Applications Claiming Priority (2)

Publications (1)

Family

ID=39855043

Family Applications (1)

Country Status (4)

Families Citing this family (4)

Family Cites Families (5)

• 2008
  • 2008-03-10 FR FR0851535A patent/FR2928426A1/fr not_active Withdrawn
• 2009
  • 2009-03-09 CN CN2009801081431A patent/CN101965459A/zh active Pending
  • 2009-03-09 WO PCT/FR2009/050380 patent/WO2009115752A2/fr active Application Filing
  • 2009-03-09 EP EP09723115A patent/EP2250377A2/de not_active Withdrawn

Non-Patent Citations (1)

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