EP1850012B1 - Ventilation device - Google Patents

Ventilation device Download PDF

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Publication number
EP1850012B1
EP1850012B1 EP07356055A EP07356055A EP1850012B1 EP 1850012 B1 EP1850012 B1 EP 1850012B1 EP 07356055 A EP07356055 A EP 07356055A EP 07356055 A EP07356055 A EP 07356055A EP 1850012 B1 EP1850012 B1 EP 1850012B1
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EP
European Patent Office
Prior art keywords
ventilation device
air
motor
case
suction
Prior art date
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Active
Application number
EP07356055A
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German (de)
French (fr)
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EP1850012A1 (en
Inventor
Serge Buseyne
Jean-François NOUVEL
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Aldes Aeraulique SA
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Aldes Aeraulique SA
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Publication of EP1850012A1 publication Critical patent/EP1850012A1/en
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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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/626—Mounting or removal of 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
    • 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
    • F04D29/42—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
    • 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
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/007—Ventilation with forced flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2250/00—Geometry
    • F05D2250/50—Inlet or outlet
    • F05D2250/51—Inlet

Definitions

  • the present invention relates to a ventilation device.
  • the invention aims a ventilation device comprising a box in which is placed a turbine whose wheel is adapted to be rotated by a motor, the box having at least one suction port through which the air can be sucked inside the box by means of the turbine and a discharge port through which the air can be discharged outside the box.
  • a ventilation device is typically used in a VMC (controlled mechanical ventilation) installation.
  • the invention aims to provide another solution, particularly effective, to reduce the power consumption of the ventilation devices.
  • the invention relates to a ventilation device of the aforementioned type, wherein the motor is disposed outside the intake air flow, the turbine being directly coupled to the motor shaft, the ventilation device further comprising a channel which surrounds the engine and is in communication with the air outside the box and with a zone of depression inside the turbine, the channel being arranged to allow air circulation enough around the engine to cool the engine.
  • the ventilation device comprises two suction orifices arranged facing each other and a deflection member for the sucked-up air, arranged so as to direct the air entering the chamber through said suction ports to the suction horn of the turbine.
  • the engine being outside the intake air flow, it can not be cooled by this air. If the engine does not have a clean ventilation system or if this system is not enough, the engine may heat up and therefore not work properly. By providing a channel around the engine in which air can circulate to cool the engine, this problem is solved.
  • the document DE 29 52 407 discloses a ventilation device comprising a box in which is placed a turbine whose wheel is adapted to be rotated by a motor, the box having at least one suction port through which the air can be sucked inside of the box by means of the turbine and a discharge orifice through which the air can be discharged outside the box, characterized in that the motor being arranged outside the intake air flow, the turbine being directly coupled to the motor shaft, the ventilation device comprising a channel which surrounds the motor and is in communication on the one hand with the air outside the box and on the other hand with a depression zone inside the turbine , the channel being arranged to allow sufficient air circulation around the engine to ensure cooling of the latter.
  • a complementary problem related to the use of such motors and such a direct coupling on the motor shaft is that for reasons of simplicity of construction, the ventilation turbines are single hearing (only one suction horn in the fan turbine). However it is essential for reasons of installation and connection of the networks that the ventilation box has two connections or suction ports arranged opposite, each serving a branch of the air extraction network. Thus, the use of a ventilation device with two suction ports with a motor arranged outside the intake air flow leads to a configuration where the two orifices are arranged vis-à-vis.
  • the invention thus makes it possible to cumulate the gains related to several parameters and thus to obtain a particularly economical ventilation device.
  • the channel has for example the shape of a cylinder closely surrounding the engine.
  • the motor is a permanent magnet motor and electronic commutation.
  • This type of engine has a high electrical efficiency, which further improves the efficiency of the ventilation device.
  • these The motors are very easy to drive (speed variation), which allows a very precise regulation of the ventilation system according to the needs. This represents a very important advantage over the prior art, in which the adjustment of the flow characteristics of the ventilation device was carried out only at the start of the installation and finally, by the adjustment of the pulley systems. belts.
  • the fact that motors with permanent magnet and electronic commutation, which are not ventilated, are placed outside the intake air flow is not a problem because of the existence of the channel in which the cooling air circulates.
  • the two suction ports may have the same axis which is substantially orthogonal to the axis of the suction horn of the turbine.
  • the deflection member may comprise two substantially flat walls each disposed facing a suction port, the walls being inclined towards each other and forming a point directed towards the suction plate of the turbine.
  • the deflection member may comprise an acoustically absorbing material. In this case, there is obtained a loss of noise radiated by the ventilation device to the suction networks, and thus a decrease in the sound power level of the system.
  • the deflection member may be formed from a solid sheet or perforated sheet, with or without an acoustically absorbing material, or be made of a block of acoustically absorbent material shaped.
  • the figure 1 represents a ventilation device 1 comprising a substantially parallelepipedal box 2.
  • Box 2 has a wall 3, an upper wall 4, two side walls 5, 6, a front wall 7 and a rear wall 8.
  • the longitudinal axis 9 of the box 2 is defined as the axis orthogonal to the front walls 7 and rear 8, and arranged centrally ( figure 2 ).
  • a first and a second partition wall 10, 11, substantially parallel to the front walls 7 and rear 8, define inside the box 2 three compartments 12, 13, 14.
  • the output shaft 16 is disposed along the longitudinal axis 9 and passes through an opening 17 formed in the first partition wall 10.
  • a turbine 18 whose wheel 19 is directly coupled to the shaft 16 of the engine 15.
  • the side walls 5, 6 of the box 2 each have a suction port 20, 21
  • the two orifices 20, 21 are arranged vis-à-vis and are here substantially circular.
  • the motor 15 drives the wheel 19 of the turbine 18, leading to the suction of the air outside the box 2 through the suction ports 20, 21 and the suction horn 22 of the turbine 18, then to their evacuation to the outside of the box 2 by a discharge orifice 23 formed in the upper wall 4 and can be provided with a grid.
  • the discharge port 23 is connected to a discharge conduit.
  • the motor 15 is preferably a permanent magnet motor and electronic commutation. This type of engine does not have a clean cooling system. However, with the arrangement described above, the motor 15 is disposed outside the intake air flow.
  • a channel 24 surrounding the motor 15 is formed in the first compartment 12.
  • the channel 24 is here made from a rolled sheet and welded, and has the shape of a cylinder 9 axis closely surrounding the motor 15.
  • the channel 24 has a first axial end adjacent to the first partition wall 10, and surrounding the opening 17, and a second axial end located at the inside of the box 2, close to but away from the rear wall 8.
  • An inlet 25 is formed in the rear wall 8 of the box 2, centrally on the longitudinal axis 9. This inlet 25 is is placed in the open air ( Figures 1 to 5 ), is connected to a conduit to draw air in any other remote area further away (out of the local, on the discharge pipe or any other appropriate provision).
  • the channel 24 in order for the cooling of the engine to be satisfactory, the channel 24 must be both large enough to allow a large air flow around the engine 15, and small enough to obtain good efficiency. cooling by forced convection.
  • the dimensioning of the space between the motor 15 and the channel depends on the caisson 2.
  • this space should be between 10 and 20 mm, the air flow circulating around the engine varies between a few tens and a few hundred m 3 / h for ventilation chambers carrying a few thousand m 3 / h.
  • a deflection member 26 of the sucked air is disposed in the third compartment 14.
  • This deflection member 26 comprises two substantially flat walls and perpendicular to the lower 3 and upper 4 walls, each disposed facing a suction orifice, and forming a V whose tip is directed towards the suction horn 22 of the turbine 18. These walls extend from the front wall 7 of the caisson 2, to which they are attached, about two-thirds of the longitudinal dimension the third compartment 14, and are spaced from the lower walls 3 and upper 4.
  • the deflection member 26 may further comprise an acoustically absorbent material or be made of such material. This reduces the noise caused by the ventilation device 1.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Massaging Devices (AREA)
  • Finger-Pressure Massage (AREA)
  • Seal Device For Vehicle (AREA)
  • Liquid Crystal (AREA)

Abstract

The device (1) has a motor (15) arranged outside an intake air flow, and a turbine (18) directly coupled to a shaft of the motor. A channel (24) surrounds the motor and is in communication with an outer air at a case (2) and with a depression zone inside the turbine. The channel is arranged to permit air circulation around the motor for ensuring the cooling of the motor. Suction orifices (20, 21) and an intake air deflection unit (26) are arranged in a manner to direct the inlet air in the case by the orifices towards inlet of the turbine.

Description

La présente invention concerne un dispositif de ventilation.The present invention relates to a ventilation device.

Plus spécifiquement, l'invention vise un dispositif de ventilation comprenant un caisson dans lequel est placée une turbine dont la roue est apte à être entraînée en rotation par un moteur, le caisson comportant au moins un orifice d'aspiration par lequel l'air peut être aspiré à l'intérieur du caisson au moyen de la turbine et un orifice d'évacuation par lequel l'air peut être évacué à l'extérieur du caisson. Un tel dispositif de ventilation est typiquement utilisé dans une installation de VMC (ventilation mécanique contrôlée).More specifically, the invention aims a ventilation device comprising a box in which is placed a turbine whose wheel is adapted to be rotated by a motor, the box having at least one suction port through which the air can be sucked inside the box by means of the turbine and a discharge port through which the air can be discharged outside the box. Such a ventilation device is typically used in a VMC (controlled mechanical ventilation) installation.

Il existe une pression grandissante sur l'amélioration de l'efficacité énergétique des bâtiments et, en conséquence, sur la réduction de la consommation électrique des dispositifs de ventilation.There is increasing pressure on improving the energy efficiency of buildings and, consequently, on reducing the electrical consumption of ventilation devices.

Plusieurs solutions ont déjà été mises en oeuvre en vue de réduire la consommation spécifique du dispositif de ventilation (puissance électrique consommée (en W) par m3/h véhiculé par le caisson). Parmi celles-ci, on peut citer l'amélioration du rendement aéraulique de la turbine (roue et volute) et l'amélioration des stratégies de régulation de pression.Several solutions have already been implemented with a view to reducing the specific consumption of the ventilation device (electric power consumed (in W) per m 3 / h conveyed by the box). Among these, one can quote the improvement of the aeraulic efficiency of the turbine (wheel and volute) and the improvement of the strategies of regulation of pressure.

L'invention a pour but de fournir une autre solution, particulièrement efficace, pour réduire la consommation électrique des dispositifs de ventilation.The invention aims to provide another solution, particularly effective, to reduce the power consumption of the ventilation devices.

A cet effet, l'invention concerne un dispositif de ventilation du type précité, dans lequel le moteur est disposé en dehors du flux d'air aspiré, la turbine étant directement accouplée à l'arbre du moteur, le dispositif de ventilation comprenant en outre un canal qui entoure le moteur et est en communication d'une part avec l'air extérieur au caisson et d'autre part avec une zone en dépression à l'intérieur de la turbine, le canal étant agencé pour permettre une circulation d'air suffisante autour du moteur pour assurer le refroidissement de ce dernier.To this end, the invention relates to a ventilation device of the aforementioned type, wherein the motor is disposed outside the intake air flow, the turbine being directly coupled to the motor shaft, the ventilation device further comprising a channel which surrounds the engine and is in communication with the air outside the box and with a zone of depression inside the turbine, the channel being arranged to allow air circulation enough around the engine to cool the engine.

En outre, selon l'invention, le dispositif de ventilation comprend deux orifices d'aspiration disposés en vis-à-vis et un organe de déflexion de l'air aspiré, disposé de sorte à diriger l'air entrant dans le caisson par lesdits orifices d'aspiration vers le pavillon d'aspiration de la turbine.In addition, according to the invention, the ventilation device comprises two suction orifices arranged facing each other and a deflection member for the sucked-up air, arranged so as to direct the air entering the chamber through said suction ports to the suction horn of the turbine.

Ainsi, puisque le moteur est disposé en dehors du flux d'air aspiré, le rendement aéraulique de la moto turbine est amélioré, car l'espace central occupé par le moteur est libéré. Un autre gain énergétique important réside dans l'accouplement direct de la turbine (celle-ci étant montée en bout d'arbre). En conséquence, il n'y a plus de pertes dues à la transmission par courroie.Thus, since the engine is disposed outside the intake air flow, the air flow efficiency of the motorcycle turbine is improved because the central space occupied by the engine is released. Another important energy gain lies in the direct coupling of the turbine (the latter being mounted at the end of the shaft). As a result, there are no more losses due to the belt drive.

En revanche, le moteur étant en dehors du flux d'air aspiré, il ne peut plus être refroidi par cet air. Si le moteur ne possède pas de système de ventilation propre ou si ce système n'est pas suffisant, le moteur risque de s'échauffer et donc de ne pas fonctionner correctement. En prévoyant un canal entourant le moteur dans lequel peut circuler de l'air pour refroidir le moteur, ce problème est résolu.However, the engine being outside the intake air flow, it can not be cooled by this air. If the engine does not have a clean ventilation system or if this system is not enough, the engine may heat up and therefore not work properly. By providing a channel around the engine in which air can circulate to cool the engine, this problem is solved.

Le document DE 29 52 407 décrit un dispositif de ventilation comprenant un caisson dans lequel est placée une turbine dont la roue est apte à être entraînée en rotation par un moteur, le caisson comportant au moins un orifice d'aspiration par lequel l'air peut être aspiré à l'intérieur du caisson au moyen de la turbine et un orifice d'évacuation par lequel l'air peut être évacué à l'extérieur du caisson, caractérisé en ce que le moteur étant disposé en dehors du flux d'air aspiré, la turbine étant directement accouplée à l'arbre du moteur, le dispositif de ventilation comprenant un canal qui entoure le moteur et est en communication d'une part avec l'air extérieur au caisson et d'autre part avec une zone en dépression à l'intérieur de la turbine, le canal étant agencé pour permettre une circulation d'air suffisante autour du moteur afin d'assurer le refroidissement de ce dernier.The document DE 29 52 407 discloses a ventilation device comprising a box in which is placed a turbine whose wheel is adapted to be rotated by a motor, the box having at least one suction port through which the air can be sucked inside of the box by means of the turbine and a discharge orifice through which the air can be discharged outside the box, characterized in that the motor being arranged outside the intake air flow, the turbine being directly coupled to the motor shaft, the ventilation device comprising a channel which surrounds the motor and is in communication on the one hand with the air outside the box and on the other hand with a depression zone inside the turbine , the channel being arranged to allow sufficient air circulation around the engine to ensure cooling of the latter.

Un problème complémentaire lié à l'utilisation de tels moteurs et d'un tel accouplement direct sur l'arbre moteur est que pour des raisons de simplicité de construction, les turbines de ventilation sont à simple ouïe (un seul pavillon d'aspiration dans la turbine du ventilateur). Or il est essentiel pour des raisons d'installation et de raccordement des réseaux que le caisson de ventilation comporte deux piquages ou orifices d'aspiration disposés en vis à vis, desservant chacun une branche du réseau d'extraction d'air. Ainsi, l'utilisation d'un dispositif de ventilation à deux orifices d'aspiration avec un moteur disposé en dehors du flux d'air aspiré conduit à une configuration où les deux orifices sont disposés en vis-à-vis.A complementary problem related to the use of such motors and such a direct coupling on the motor shaft is that for reasons of simplicity of construction, the ventilation turbines are single hearing (only one suction horn in the fan turbine). However it is essential for reasons of installation and connection of the networks that the ventilation box has two connections or suction ports arranged opposite, each serving a branch of the air extraction network. Thus, the use of a ventilation device with two suction ports with a motor arranged outside the intake air flow leads to a configuration where the two orifices are arranged vis-à-vis.

Grâce à la mise en place d'un organe de déflexion de l'air aspiré, on évite les inconvénients résultant de cette configuration, et liés de la collision des flux d'air entrant dans le caisson par les orifices en vis-à-vis, à savoir des pertes de charge élevées et des instabilités aérauliques. En conséquence, l'écoulement de l'air depuis les orifices d'aspiration vers le pavillon de la turbine est guidé par l'organe de déflexion. L'aéraulique, et donc le rendement électrique du dispositif de ventilation s'en trouvent donc considérablement améliorés. L'organe de déflexion contribue donc également à l'amélioration de la performance énergétique du dispositif de ventilation.Thanks to the establishment of a deflecting member of the air sucked, it avoids the disadvantages resulting from this configuration, and related collision of air flows entering the box through the orifices vis-à-vis , namely high pressure drops and aeraulic instabilities. As a result, the flow of air from the suction ports to the roof of the turbine is guided by the deflection member. The aeraulic, and therefore the performance electrical ventilation device are thus greatly improved. The deflection member therefore also contributes to improving the energy performance of the ventilation device.

Par la combinaison des caractéristiques précitées, l'invention permet donc de cumuler les gains liés à plusieurs paramètres et ainsi d'obtenir un dispositif de ventilation particulièrement économique.By the combination of the above characteristics, the invention thus makes it possible to cumulate the gains related to several parameters and thus to obtain a particularly economical ventilation device.

Le canal présente par exemple la forme d'un cylindre entourant étroitement le moteur.The channel has for example the shape of a cylinder closely surrounding the engine.

Selon une réalisation possible, le moteur est un moteur à aimant permanent et commutation électronique.According to one possible embodiment, the motor is a permanent magnet motor and electronic commutation.

Ce type de moteur possède un haut rendement électrique, qui permet d'améliorer encore l'efficacité du dispositif de ventilation. De plus, ces moteurs présentent une grande facilité de pilotage (variation de vitesse), ce qui autorise une régulation très précise du système de ventilation en fonction des besoins. Ceci représente un avantage très important par rapport à l'art antérieur, où l'ajustement des caractéristiques débit pression du dispositif de ventilation s'effectuait uniquement à la mise en route de l'installation et de façon définitive, par le réglage des systèmes poulies courroies. Le fait que les moteurs à aimant permanent et commutation électronique, qui ne sont pas ventilés, sont placés hors du flux d'air aspiré ne pose pas de problème, du fait de l'existence du canal où circule l'air de refroidissement.This type of engine has a high electrical efficiency, which further improves the efficiency of the ventilation device. In addition, these The motors are very easy to drive (speed variation), which allows a very precise regulation of the ventilation system according to the needs. This represents a very important advantage over the prior art, in which the adjustment of the flow characteristics of the ventilation device was carried out only at the start of the installation and finally, by the adjustment of the pulley systems. belts. The fact that motors with permanent magnet and electronic commutation, which are not ventilated, are placed outside the intake air flow is not a problem because of the existence of the channel in which the cooling air circulates.

Les deux orifices d'aspiration peuvent présenter un même axe qui est sensiblement orthogonal à l'axe du pavillon d'aspiration de la turbine.The two suction ports may have the same axis which is substantially orthogonal to the axis of the suction horn of the turbine.

L'organe de déflexion peut comprendre deux parois sensiblement planes disposées chacune en regard d'un orifice d'aspiration, les parois étant inclinées l'une vers l'autre et formant une pointe dirigée vers le pavillon d'aspiration de la turbine.The deflection member may comprise two substantially flat walls each disposed facing a suction port, the walls being inclined towards each other and forming a point directed towards the suction plate of the turbine.

En outre, l'organe de déflexion peut comprendre un matériau acoustiquement absorbant. Dans ce cas, on obtient un affaiblissement du bruit rayonné par le dispositif de ventilation vers les réseaux d'aspiration, et donc une diminution du niveau de puissance acoustique du système.In addition, the deflection member may comprise an acoustically absorbing material. In this case, there is obtained a loss of noise radiated by the ventilation device to the suction networks, and thus a decrease in the sound power level of the system.

L'organe de déflexion peut être formé à partir d'une tôle pleine ou d'une tôle perforée, pourvue ou non d'un matériau acoustiquement absorbant, ou être constitué d'un bloc de matériau acoustiquement absorbant mis en forme.The deflection member may be formed from a solid sheet or perforated sheet, with or without an acoustically absorbing material, or be made of a block of acoustically absorbent material shaped.

On décrit à présent, à titre d'exemple non limitatif, un mode de réalisation possible de l'invention, en référence aux figures annexées :

  • La figure 1 est une vue en perspective éclatée du dispositif de ventilation selon l'invention ;
  • La figure 2 est une vue latérale de l'intérieur du dispositif de ventilation, montrant le trajet de l'air de refroidissement du moteur ;
  • La figure 3 est une vue agrandie du détail A de la figure 2 ;
  • La figure 4 est une vue latérale de l'intérieur du dispositif de ventilation, montrant l'organe de déflexion ; et
  • La figure 5 est une vue de dessus de l'intérieur du dispositif de ventilation, montrant le trajet de l'air aspiré par la turbine.
We will now describe, by way of nonlimiting example, a possible embodiment of the invention, with reference to the appended figures:
  • The figure 1 is an exploded perspective view of the ventilation device according to the invention;
  • The figure 2 is a side view of the interior of the ventilation device, showing the path of the engine cooling air;
  • The figure 3 is an enlarged view of detail A of the figure 2 ;
  • The figure 4 is a side view of the interior of the ventilation device, showing the deflection member; and
  • The figure 5 is a top view of the inside of the ventilation device, showing the path of the air sucked by the turbine.

La figure 1 représente un dispositif de ventilation 1 comprenant un caisson 2 sensiblement parallélépipédique. Le caisson 2 comporte une paroi inférieure 3, une paroi supérieure 4, deux parois latérales 5, 6, une paroi avant 7 et une paroi arrière 8. On définit l'axe longitudinal 9 du caisson 2 comme l'axe orthogonal aux parois avant 7 et arrière 8, et disposé de façon centrée (figure 2).The figure 1 represents a ventilation device 1 comprising a substantially parallelepipedal box 2. Box 2 has a wall 3, an upper wall 4, two side walls 5, 6, a front wall 7 and a rear wall 8. The longitudinal axis 9 of the box 2 is defined as the axis orthogonal to the front walls 7 and rear 8, and arranged centrally ( figure 2 ).

En outre, une première et une deuxième parois de séparation 10, 11, sensiblement parallèles aux parois avant 7 et arrière 8, définissent à l'intérieur du caisson 2 trois compartiments 12, 13, 14.In addition, a first and a second partition wall 10, 11, substantially parallel to the front walls 7 and rear 8, define inside the box 2 three compartments 12, 13, 14.

Dans le premier compartiment 12 est placé un moteur 15, dont l'arbre de sortie 16 est disposé selon l'axe longitudinal 9 et passe à travers une ouverture 17 ménagée dans la première paroi de séparation 10. Dans le deuxième compartiment 13 (sensiblement central) est placée une turbine 18 dont la roue 19 est directement accouplée à l'arbre 16 du moteur 15. Enfin, au niveau du troisième compartiment 14, les parois latérales 5, 6 du caisson 2 présentent chacune un orifice d'aspiration 20, 21. Les deux orifices 20, 21 sont disposés en vis-à-vis et sont ici sensiblement circulaires.In the first compartment 12 is placed a motor 15, the output shaft 16 is disposed along the longitudinal axis 9 and passes through an opening 17 formed in the first partition wall 10. In the second compartment 13 (substantially central ) is placed a turbine 18 whose wheel 19 is directly coupled to the shaft 16 of the engine 15. Finally, at the third compartment 14, the side walls 5, 6 of the box 2 each have a suction port 20, 21 The two orifices 20, 21 are arranged vis-à-vis and are here substantially circular.

En fonctionnement, le moteur 15 entraîne la roue 19 de la turbine 18, conduisant à l'aspiration de l'air extérieur au caisson 2 par les orifices d'aspiration 20, 21 et le pavillon d'aspiration 22 de la turbine 18, puis à leur évacuation vers l'extérieur du caisson 2 par un orifice d'évacuation 23 ménagé dans la paroi supérieure 4 et pouvant être muni d'une grille. Dans certaines configurations (non représentées ici), l'orifice d'évacuation 23 est raccordé à un conduit de refoulement.In operation, the motor 15 drives the wheel 19 of the turbine 18, leading to the suction of the air outside the box 2 through the suction ports 20, 21 and the suction horn 22 of the turbine 18, then to their evacuation to the outside of the box 2 by a discharge orifice 23 formed in the upper wall 4 and can be provided with a grid. In certain configurations (not shown here), the discharge port 23 is connected to a discharge conduit.

Le moteur 15 est de préférence un moteur à aimant permanent et commutation électronique. Ce type de moteur est dépourvu d'un système de refroidissement propre. Or, avec la disposition décrite ci-dessus, le moteur 15 est disposé en dehors du flux d'air aspiré.The motor 15 is preferably a permanent magnet motor and electronic commutation. This type of engine does not have a clean cooling system. However, with the arrangement described above, the motor 15 is disposed outside the intake air flow.

Pour assurer le refroidissement du moteur 15, et donc le bon fonctionnement de celui-ci, un canal 24 entourant le moteur 15 est ménagé dans le premier compartiment 12. Le canal 24 est ici réalisé à partir d'une tôle roulée et soudée, et présente la forme d'un cylindre d'axe 9 entourant étroitement le moteur 15. Le canal 24 présente une première extrémité axiale adjacente à la première paroi de séparation 10, et entourant l'ouverture 17, et une deuxième extrémité axiale située à l'intérieur du caisson 2, à proximité mais à distance de la paroi arrière 8. Un orifice d'entrée 25 est ménagé dans la paroi arrière 8 du caisson 2, de façon centrée sur l'axe longitudinal 9. Cet orifice d'entrée 25 est soit disposé à l'air libre (figures 1 à 5), soit raccordé à un conduit allant puiser l'air dans toute autre zone déportée plus éloignée (hors du local, sur le conduit de refoulement ou toute autre disposition adéquate).To ensure the cooling of the motor 15, and therefore the proper operation thereof, a channel 24 surrounding the motor 15 is formed in the first compartment 12. The channel 24 is here made from a rolled sheet and welded, and has the shape of a cylinder 9 axis closely surrounding the motor 15. The channel 24 has a first axial end adjacent to the first partition wall 10, and surrounding the opening 17, and a second axial end located at the inside of the box 2, close to but away from the rear wall 8. An inlet 25 is formed in the rear wall 8 of the box 2, centrally on the longitudinal axis 9. This inlet 25 is is placed in the open air ( Figures 1 to 5 ), is connected to a conduit to draw air in any other remote area further away (out of the local, on the discharge pipe or any other appropriate provision).

Ainsi, lorsque le dispositif de ventilation 1 est en fonctionnement, il existe une dépression à l'intérieur de la turbine 18, entre la roue 19 et la volute. L'air extérieur au caisson 2 étant quant à lui à la pression atmosphérique (ou à une pression positive lorsque l'orifice 25 est raccordé au conduit de refoulement) de même que l'air situé dans le premier compartiment 12 à l'extérieur du canal 24, il se crée une circulation d'air depuis l'orifice d'entrée 25, à l'intérieur du canal 24, et en direction de l'ouverture 17 puis de la turbine 18. Cette circulation d'air autour du moteur 15 permet le refroidissement du moteur 15.Thus, when the ventilation device 1 is in operation, there is a vacuum inside the turbine 18, between the wheel 19 and the volute. The air outside the box 2 is meanwhile at atmospheric pressure (or a positive pressure when the orifice 25 is connected to the discharge pipe) as well as the air located in the first compartment 12 outside the channel 24, it creates an air flow from the inlet 25, inside the channel 24, and towards the opening 17 and the turbine 18. This air flow around the engine 15 allows the cooling of the engine 15.

L'homme du métier comprendra que, pour que le refroidissement du moteur 15 soit satisfaisant, le canal 24 doit être à la fois suffisamment grand pour autoriser un débit d'air important autour du moteur 15, et suffisamment petit pour obtenir une bonne efficacité de refroidissement par une convection forcée. Le dimensionnement de l'espace entre le moteur 15 et le canal dépend du caisson 2.Those skilled in the art will understand that, in order for the cooling of the engine to be satisfactory, the channel 24 must be both large enough to allow a large air flow around the engine 15, and small enough to obtain good efficiency. cooling by forced convection. The dimensioning of the space between the motor 15 and the channel depends on the caisson 2.

A titre d'exemple de réalisation, cet espace devra être compris entre 10 et 20 mm, le débit d'air circulant autour du moteur variant entre quelques dizaines et quelques centaines de m3/h pour des caissons de ventilation véhiculant quelques milliers de m3/h.As an exemplary embodiment, this space should be between 10 and 20 mm, the air flow circulating around the engine varies between a few tens and a few hundred m 3 / h for ventilation chambers carrying a few thousand m 3 / h.

Un organe de déflexion 26 de l'air aspiré est disposé dans le troisième compartiment 14. Cet organe de déflexion 26 comprend deux parois sensiblement planes et perpendiculaires aux parois inférieure 3 et supérieure 4, disposées chacune en regard d'un orifice d'aspiration, et formant un V dont la pointe est dirigée vers le pavillon d'aspiration 22 de la turbine 18. Ces parois s'étendent depuis la paroi avant 7 du caisson 2, à laquelle elles sont fixées, sur environ les deux tiers de la dimension longitudinale du troisième compartiment 14, et sont espacées des parois inférieure 3 et supérieure 4.A deflection member 26 of the sucked air is disposed in the third compartment 14. This deflection member 26 comprises two substantially flat walls and perpendicular to the lower 3 and upper 4 walls, each disposed facing a suction orifice, and forming a V whose tip is directed towards the suction horn 22 of the turbine 18. These walls extend from the front wall 7 of the caisson 2, to which they are attached, about two-thirds of the longitudinal dimension the third compartment 14, and are spaced from the lower walls 3 and upper 4.

L'air aspiré par les orifices d'aspiration 20, 21 en regard l'un de l'autre est ainsi dévié (comme le montre la figure 5) en direction du pavillon d'aspiration 22 de la turbine 18, ce qui améliore le rendement du dispositif de ventilation 1 en diminuant les zones de turbulence, les instabilités aérauliques, et les pertes de charge.The air sucked by the suction ports 20, 21 opposite one another is thus deflected (as shown in FIG. figure 5 ) towards the suction horn 22 of the turbine 18, which improves the efficiency of the ventilation device 1 by reducing the turbulence zones, airflow instabilities, and pressure drops.

L'organe de déflexion 26 peut en outre comporter un matériau acoustiquement absorbant ou être constitué d'un tel matériau. Ceci permet de réduire le bruit occasionné par le dispositif de ventilation 1.The deflection member 26 may further comprise an acoustically absorbent material or be made of such material. This reduces the noise caused by the ventilation device 1.

Il va de soi que l'invention n'est pas limitée au mode de réalisation décrit ci-dessus à titre d'exemple mais qu'elle en embrasse au contraire toutes les variantes de réalisation.It goes without saying that the invention is not limited to the embodiment described above by way of example but that it encompasses all variants.

Claims (8)

  1. Ventilation device comprising a case (2) in which there is placed an impeller (18) whose wheel (19) can be driven to rotate by a motor (15), the case having at least one suction orifice (20, 21) through which air can be sucked inside the case (2) by means of the impeller (18), and a discharge orifice (23) through which air can be discharged outside the case (2), the motor (15) being arranged away from the sucked-in air flow, the impeller (18) being directly coupled to the shaft (16) of the motor (15), the ventilation device (1) comprising a duct (24) which surrounds the motor (15) and is in communication, on the one hand, with the air outside the case (2) and, on the other hand, with a vacuum region inside the impeller (18), the duct (24) being designed to allow sufficient air to circulate around the motor (15) so that the latter can be cooled, characterized in that the ventilation device (1) comprises two suction orifices (20, 21) arranged opposite one another and a member (26) for deflecting the sucked-in air, this member being arranged in such a way as to direct the air entering the case (2) through the said suction orifices (20, 21) towards the suction bell (22) of the impeller (18).
  2. Ventilation device according to Claim 1, characterized in that the duct (24) communicates with the outside of the case (2) through an orifice (25) formed in a wall of the case (2), the orifice (25) being intended to be arranged in free air or connected to a line intended to draw in air from an offset region.
  3. Ventilation device according to one of Claims 1 to 2, characterized in that the motor (15) is an electronically commutated permanent-magnet motor.
  4. Ventilation device according to one of Claims 1 to 3, characterized in that the two suction orifices (20, 21) have a common axis which is substantially orthogonal to the axis (9) of the suction bell (22) of the impeller (18).
  5. Ventilation device according to one of Claims 1 to 4, characterized in that the deflection member (26) comprises two substantially planar walls which are each arranged facing a suction orifice (20, 21), the walls being inclined towards one another and forming a point directed towards the suction bell (22) of the impeller (18).
  6. Ventilation device according to one of Claims 1 to 5, characterized in that the deflection member (26) comprises an acoustically absorbent material.
  7. Ventilation device according to one of Claims 1 to 6, characterized in that the deflection member (26) is formed from a solid metal sheet or from a perforated metal sheet.
  8. Ventilation device according to one of Claims 1 to 7, characterized in that the deflection member (26) consists of a shaped block of acoustically absorbent material.
EP07356055A 2006-04-28 2007-04-24 Ventilation device Active EP1850012B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0603851A FR2900449B1 (en) 2006-04-28 2006-04-28 VENTILATION DEVICE

Publications (2)

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EP1850012A1 EP1850012A1 (en) 2007-10-31
EP1850012B1 true EP1850012B1 (en) 2008-12-24

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EP (1) EP1850012B1 (en)
AT (1) ATE418680T1 (en)
DE (1) DE602007000388D1 (en)
ES (1) ES2319698T3 (en)
FR (1) FR2900449B1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2950132B1 (en) * 2009-09-11 2012-01-13 Soler & Palau COOLING DEVICE FOR A CONSTANT PRESSURE VENTILATION HOUSING
FR2951248B1 (en) * 2009-10-14 2012-03-09 France Air AIR EXTRACTION CABIN AND METHOD OF CONTROLLING THE CABIN
FR3033627B1 (en) * 2015-03-13 2020-01-24 France Air VENTILATION BOX
FR3043760B1 (en) * 2015-11-13 2017-11-24 Aldes Aeraulique MODULAR VENTILATION HOUSING RECEIVING SHEATHINGS WITH LARGE CHOICE OF ORIENTATION
FR3047524B1 (en) * 2016-02-09 2019-12-06 Atlantic Climatisation & Ventilation VENTILATION DEVICE
FR3050515B1 (en) * 2016-04-20 2019-04-26 Soler & Palau Research S.L FUME EXTRACTOR HOUSING
FR3074568B1 (en) * 2017-12-05 2020-07-10 Astato UPSTREAM CHICANE VENTILATION BOX
US11156229B2 (en) * 2019-05-08 2021-10-26 Xceed Engineering LLC Livestock blower apparatus

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2952407A1 (en) * 1979-12-27 1981-07-02 Süddeutsche Kühlerfabrik Julius Fr. Behr GmbH & Co KG, 7000 Stuttgart Radial fan for air-conditioning of vehicles - has housing apertured for airflow and motor driven fan with connected vanes
SE443408B (en) * 1979-09-28 1986-02-24 Sueddeutsche Kuehler Behr RADIAL SPLIT FOR HEATING OR AIR CONDITIONING INSTALLATIONS IN VEHICLES
SE9303599L (en) * 1993-11-02 1995-05-03 Electrolux Ab Device for cooling an electric motor driven turbo fan assembly
IT1308475B1 (en) * 1999-05-07 2001-12-17 Gate Spa FAN MOTOR, IN PARTICULAR FOR A HEAT EXCHANGER OF A VEHICLE
US6439861B1 (en) * 2000-11-22 2002-08-27 Sen-Yuan Shieh Blower machine with an inherent air flow heat dissipation structure
DE10200951A1 (en) * 2002-01-08 2003-08-14 Kern Gmbh Dr Method for cooling a vacuum cleaner fan motor has an impeller with vanes on both sides for suction and cooling
FR2859579B1 (en) * 2003-09-10 2006-03-03 Valeo Climatisation DEVICE FOR SUPPORTING AN ELECTRIC MOTOR DRIVING A TURBINE, ESPECIALLY FOR AN APPARATUS FOR HEATING, VENTILATION AND / OR AIR CONDITIONING OF A MOTOR VEHICLE

Also Published As

Publication number Publication date
FR2900449B1 (en) 2012-08-24
FR2900449A1 (en) 2007-11-02
EP1850012A1 (en) 2007-10-31
ES2319698T3 (en) 2009-05-11
DE602007000388D1 (en) 2009-02-05
ATE418680T1 (en) 2009-01-15

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