EP1106837A1 - Fan casing - Google Patents

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Publication number
EP1106837A1
EP1106837A1 EP00126610A EP00126610A EP1106837A1 EP 1106837 A1 EP1106837 A1 EP 1106837A1 EP 00126610 A EP00126610 A EP 00126610A EP 00126610 A EP00126610 A EP 00126610A EP 1106837 A1 EP1106837 A1 EP 1106837A1
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EP
European Patent Office
Prior art keywords
volute
installation according
blower
angle
evolution
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Granted
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EP00126610A
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German (de)
French (fr)
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EP1106837B1 (en
Inventor
Jihad El Mayas
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
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Valeo Climatisation SA
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Publication of EP1106837A1 publication Critical patent/EP1106837A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4226—Fan casings
    • F04D29/4233—Fan casings with volutes extending mainly in axial or radially inward direction

Definitions

  • the subject of the present invention is a heating and / or air conditioning system comprising at least one centrifugal blower comprising at least minus an annular turbine provided with fins, which is rotated around an axis of rotation by a motor, this annular turbine being surrounded by a volute defining an air transmission space leaving, by centrifugal effect, from the periphery of the annular turbine, to direct it towards a region of output of the blower.
  • Such a kicker presenting an evolution radial forming a spiral is for example described in Japanese Patent Application JP-9-242 696 (DENSO Corp. Ltd) filed on March 11, 1996 and published on September 16, 1997.
  • JP-9-158 898 (DENSO Corp. Ltd) filed on December 5, 1995 and published on June 17, 1997 describes a pulsator which associates a radial evolution of the aforementioned type to an evolution axial according to the same angle so as to define a crown-shaped sector whose height taken parallel to the axis of the blower varies significantly linearly as a function of the angle.
  • This sector in shape crown has an inclined inner wall reducing the noise generated in the sector thus created.
  • Such a pulser has performance optimized, but it occupies a large space, which will contrary to the current requirements of the manufacturers of reduce the space occupied by the components.
  • the value of the coefficient Io of evolution exponential is, in some pulsers, lowered to values ensuring a compromise between the radial dimension and performance.
  • the subject of the present invention is a pulser with reduced radial dimensions, while maintaining satisfactory performance.
  • the invention makes it possible to obtain particularly remarkable results, in particular with r O / H ' O ⁇ 1.
  • the blower represented in FIGS. 1a and 1b has a turbine 1 in the form of an annular crown, provided with blades 2 and surrounded by a volute 3 whose external wall 6 has a radial evolution forming a spiral which widens towards the outlet 14 of the blower .
  • This radial development is accompanied by an axial development to define an annular corridor of progressively increasing height in the direction of the outlet 14 and which is delimited on the inside by an internal wall 10 which forms an angle ⁇ 2 (increasing or not) with a plane normal to the axis of the blower, this angle corresponding substantially to the angle ⁇ f of ejection of the air flow outside the turbine 1.
  • the device according to the invention illustrated by Figures 2a, 2b, 3a and 3b shows a motor 28 of which the axis 30 drives an annular turbine 25 provided with blades 26 and which is surrounded by a volute 20 delimited at its upper part by a crown region 21, at its lower part by a bottom 22, as well as by a wall 35 which defines an annular passage 36 having a radial evolution as a function of the angle ⁇ and finally a wall 23 located substantially in the extension of the rim 34 of turbine 25, and which defines together with an extension 35 'of the wall 35, a annular passage 38 having an axial evolution corresponding to an increasing height towards exit 40 of the kicker.
  • the spiral formed by the wall 35 has a radial expansion as a function of the angle ⁇ (taken in a plane perpendicular to the axis of rotation of the turbine 25 ).
  • ⁇ 0 ° corresponds to the start of the radial expansion, in the vicinity of the edge 43 of the outlet 40, and ⁇ M corresponds to the end of the radial expansion, in the vicinity of the edge 44 of the outlet 40.
  • the volute 20 also has a axial expansion, defining an annular passage 28 extending towards the motor 28 the corridor annular 36.
  • the annular passage 38 is delimited by the extension 35 ′ of the spiral wall 35, the bottom 22, and the wall 23.
  • the fins 26 have at their end located on the side of the air inlet 50 a concave bevel 27 of height h b which runs along a corresponding curved region 24 forming part of an upper housing of the volute 20. If the height of the blade 26 is designated, it is advantageous that h b / h p ⁇ 0.1. This makes it possible to improve the aerodynamic performance of the blower (by approximately 10 to 15%) and to reduce the noise generated by it (by approximately 2 to 3 dBA).
  • the ends 27 and 27 ′ of the blades 26 are interconnected by strips 22 and 32 which occupy part of the width of the blades 26, without cover, so as to allow axial demoulding of the assembly constituted by the blades 26, the strips 12 and 32 and the conical bowl 29 secured to the strip 32 and which comes to engage on axis 30.
  • the strip upper 37 is arranged on the longitudinal face outer of the blades 26 and the lower strip 39 secured of bowl 29 occupies most or all of the 27 ′ end, which also makes it possible to demold all.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The housing for a ventilator has an annular turbine (25) with vanes (26), driven by a motor (28). The turbine has a volute housing (20) defining an air outlet passage. The volute has an internal wall (35) with a radius having an exponential angular increase defined by a given formula. This uses the dimensions of the inner wall radius and an expansion constant with a defined range of values.

Description

La présente invention a pour objet une installation de chauffage et/ou de climatisation comprenant au moins un pulseur centrifuge comportant au moins une turbine annulaire pourvue d'ailettes, qui est entraínée en rotation autour d'un axe de rotation par un moteur, cette turbine annulaire étant entourée par une volute définissant un espace de transmission de l'air sortant, par effet centrifuge, de la périphérie de la turbine annulaire, pour le diriger vers une région de sortie du pulseur.The subject of the present invention is a heating and / or air conditioning system comprising at least one centrifugal blower comprising at least minus an annular turbine provided with fins, which is rotated around an axis of rotation by a motor, this annular turbine being surrounded by a volute defining an air transmission space leaving, by centrifugal effect, from the periphery of the annular turbine, to direct it towards a region of output of the blower.

Dans de telles installation, il a été prévu de conférer à la paroi interne, de rayon r, de la volute, une évolution radiale en fonction d'un angle  pris dans un plan perpendiculaire à l'axe de rotation de manière à former une spirale, notamment exponentielle, et conforme à la relation : r = ro exp ( Io π  / 180° )    pour  compris entre 0° et M, M désignant la valeur maximum de l'angle  intéressé par ladite évolution angulaire, et correspondant en général à un bord de sortie de la région de sortie ;
   et Io désignant la constante d'évolution radiale exponentielle.In such installations, provision has been made to impart to the internal wall, of radius r, of the volute, a radial evolution as a function of an angle  taken in a plane perpendicular to the axis of rotation so as to form a spiral, in particular exponential, and in conformity with the relation: r = r o exp (I o π  / 180 °) for  between 0 ° and  M ,  M denoting the maximum value of the angle  interested in said angular evolution, and generally corresponding to an exit edge of the exit region;
and Io denoting the constant of exponential radial evolution.

Un tel pulseur présentant une évolution radiale formant une spirale est par exemple décrit dans la demande de Brevet Japonais JP-9-242 696 (DENSO Corp. Ltd) déposée le 11 Mars 1996 et publiée le 16 Septembre 1997.Such a kicker presenting an evolution radial forming a spiral is for example described in Japanese Patent Application JP-9-242 696 (DENSO Corp. Ltd) filed on March 11, 1996 and published on September 16, 1997.

Par ailleurs, la demande de Brevet Japonais JP-9-158 898 (DENSO Corp. Ltd) déposée le 5 Décembre 1995 et publiée le 17 Juin 1997 décrit un pulseur qui associe une évolution radiale de type précité à une évolution axiale en fonction du même angle de manière à définir un secteur en forme de couronne dont la hauteur prise parallèlement à l'axe du pulseur varie sensiblement linéairement en fonction de l'angle. Ce secteur en forme de couronne présente une paroi interne inclinée permettant de diminuer le bruit généré dans le secteur ainsi créé.Furthermore, the Japanese patent application JP-9-158 898 (DENSO Corp. Ltd) filed on December 5, 1995 and published on June 17, 1997 describes a pulsator which associates a radial evolution of the aforementioned type to an evolution axial according to the same angle so as to define a crown-shaped sector whose height taken parallel to the axis of the blower varies significantly linearly as a function of the angle. This sector in shape crown has an inclined inner wall reducing the noise generated in the sector thus created.

Un tel pulseur présente des performances optimisées, mais il occupe un espace important, ce qui va à l'encontre des exigences actuelles des constructeurs de diminuer l'espace occupé par les composants.Such a pulser has performance optimized, but it occupies a large space, which will contrary to the current requirements of the manufacturers of reduce the space occupied by the components.

Pour limiter l'encombrement radial des pulseurs tout en conservant une majeure partie des avantages liés à l'existence d'une évolution radiale du rayon r de la paroi interne de la volute en fonction de l'angle , la valeur du coefficient Io d'évolution exponentielle est, dans certains pulseurs, abaissé à des valeurs assurant un compromis entre la dimension radiale et les performances.To limit the radial size of the pulsers while retaining a major part of advantages linked to the existence of a radial evolution of the radius r of the inner wall of the volute as a function of the angle , the value of the coefficient Io of evolution exponential is, in some pulsers, lowered to values ensuring a compromise between the radial dimension and performance.

On connaít ainsi des pulseurs à encombrement radial réduit pour lesquels la valeur de Io est voisine de 7,2.10-2.We thus know pulsers with reduced radial dimensions for which the value of Io is close to 7.2.10 -2 .

Comme on l'a indiqué ci-dessus, cet encombrement réduit ne permet pas de tirer pleinement partie des possibilités du pulseur. Il en résulte un rendement et une pression de sortie qui sont notablement inférieurs à ceux obtenus avec un pulseur de dimensions "normales" qui n'a pas fait l'objet d'un tel compromis, ce qui conduit à des performances non satisfaisantes.As noted above, this small footprint does not allow full pull part of the possibilities of the kicker. This results in a output and outlet pressure which are notably lower than those obtained with a blower of dimensions "normal" which has not been the subject of such a compromise, which leads to unsatisfactory performance.

La présente invention a pour objet un pulseur présentant un encombrement radial réduit, tout en conservant des performances satisfaisantes.The subject of the present invention is a pulser with reduced radial dimensions, while maintaining satisfactory performance.

L'invention concerne ainsi une installation de chauffage-climatisation présentant au moins un pulseur centrifuge comportant au moins une turbine annulaire pourvue d'ailettes, qui est entraínée par un moteur, cette turbine annulaire étant entourée par une volute définissant un espace de transmission de l'air sortant par effet centrifuge de la périphérie de la turbine annulaire, pour le diriger vers une région de sortie du pulseur, la volute présentant une paroi interne de rayon r présentant une évolution angulaire exponentielle en fonction d'un angle  pris dans un plan perpendiculaire à l'axe de rotation du pulseur, conforme à la relation : r = ro exp ( Io π  / 180° )    pour  compris entre 0° et M

  • ro = rayon de la paroi interne pour  = 0°
  • Io = constante,
  • caractérisée en ce que :
    • 6,5.10-2 ≤ Io ≤ 8.10-2    et en ce que la paroi interne de la volute présente une hauteur croissante en fonction de l'angle  depuis une valeur H'o pour  = 0 jusqu'à une valeur H'M pour  = M, avec 0,67 ≤ ro/H'M ≤ 0,8 The invention thus relates to a heating-air conditioning installation having at least one centrifugal fan comprising at least one annular turbine provided with fins, which is driven by a motor, this annular turbine being surrounded by a volute defining a transmission space of the air leaving by centrifugal effect from the periphery of the annular turbine, to direct it towards an outlet region of the blower, the volute having an internal wall of radius r having an exponential angular evolution as a function of an angle  taken in a plane perpendicular to the axis of rotation of the blower, conforming to the relationship: r = r o exp (I o π  / 180 °) for  between 0 ° and  M
  • r o = radius of the internal wall for  = 0 °
  • I o = constant,
  • characterized in that:
    • 6.5.10 -2 ≤ I o ≤ 8.10 -2 and in that the internal wall of the volute has an increasing height as a function of the angle  from a value H ' o for  = 0 to a value H' M for  =  M , with 0.67 ≤ r o / H ' M ≤ 0.8

    En particulier, on peut avoir Io ≃ 7,210-2.In particular, we can have Io ≃ 7,210 -2 .

    Selon un mode de réalisation préféré, ro/H'M ≃ 0,7.According to a preferred embodiment, r o / H ' M ≃ 0.7.

    L'invention permet d'obtenir des résultats particulièrement remarquables notamment avec rO/H'O ≃ 1.The invention makes it possible to obtain particularly remarkable results, in particular with r O / H ' O ≃ 1.

    Les caractéristiques et avantages de l'invention apparaítront à la lecture de la description qui va suivre, donnée à titre d'exemple non limitatif, en liaison avec les dessins dans lesquels :

    • les figures 1a et 1b représentent en perspective et en coupe partielle, un pulseur de l'art antérieur selon la demande JP-9-158 898 précitée ;
    • les figures 2a et 2b représentent une vue éclatée d'un pulseur selon l'invention, respectivement en perspective et de côté ;
    • la figure 3a représente en coupe axiale un pulseur assemblé selon les figures 2a et 2b ;
    • la figure 3b illustre l'évolution radiale du pulseur de la figure 3a, en fonction de l'angle  ;
    • la figure 4 illustre les performances d'un pulseur selon l'invention ;
    • les figures 5a et 5b sont respectivement des détails des ailettes du pulseur de la figure 3a (figure 5a), et d'une variante de celle-ci (figure 5b).
    The characteristics and advantages of the invention will appear on reading the description which follows, given by way of nonlimiting example, in conjunction with the drawings in which:
    • Figures 1a and 1b show in perspective and in partial section, a prior art blower according to the aforementioned application JP-9-158 898;
    • Figures 2a and 2b show an exploded view of a blower according to the invention, respectively in perspective and from the side;
    • Figure 3a shows in axial section a blower assembled according to Figures 2a and 2b;
    • FIG. 3b illustrates the radial evolution of the pulser of FIG. 3a, as a function of the angle ;
    • FIG. 4 illustrates the performance of a pulser according to the invention;
    • Figures 5a and 5b are respectively details of the fins of the blower of Figure 3a (Figure 5a), and a variant thereof (Figure 5b).

    Le pulseur représenté aux figures 1a et 1b présente une turbine 1 en forme de couronne annulaire, munie de pales 2 et entourée par une volute 3 dont la paroi externe 6 présente une évolution radiale formant une spirale qui s'évase vers la sortie 14 du pulseur. Cette évolution radiale s'accompagne d'une évolution axiale pour définir un couloir annulaire de hauteur progressivement croissante en direction de la sortie 14 et qui est délimitée à l'intérieur par une paroi interne 10 qui forme un angle 2 (croissant ou non) avec un plan normal à l'axe du pulseur, cet angle correspondant sensiblement à l'angle f d'éjection du flux d'air à l'extérieur de la turbine 1.The blower represented in FIGS. 1a and 1b has a turbine 1 in the form of an annular crown, provided with blades 2 and surrounded by a volute 3 whose external wall 6 has a radial evolution forming a spiral which widens towards the outlet 14 of the blower . This radial development is accompanied by an axial development to define an annular corridor of progressively increasing height in the direction of the outlet 14 and which is delimited on the inside by an internal wall 10 which forms an angle  2 (increasing or not) with a plane normal to the axis of the blower, this angle corresponding substantially to the angle  f of ejection of the air flow outside the turbine 1.

    Comme indiqué ci-dessus, un tel pulseur présente l'inconvénient d'un encombrement important.As stated above, such a kicker has the disadvantage of a large size.

    Le dispositif selon l'invention illustré par les figures 2a,2b,3a et 3b, présente un moteur 28 dont l'axe 30 entraíne une turbine annulaire 25 pourvue de pales 26 et qui est entouré par une volute 20 délimitée à sa partie supérieure par une région de couronne 21, à sa partie inférieure par un fond 22, ainsi que par une paroi 35 qui définit un couloir annulaire 36 présentant une évolution radiale en fonction de l'angle  et enfin une paroi 23 située sensiblement dans le prolongement du pourtour 34 de la turbine 25, et qui définit conjointement avec un prolongement 35' de la paroi 35, un couloir annulaire 38 présentant une évolution axiale correspondant à une hauteur croissante vers la sortie 40 du pulseur.The device according to the invention illustrated by Figures 2a, 2b, 3a and 3b shows a motor 28 of which the axis 30 drives an annular turbine 25 provided with blades 26 and which is surrounded by a volute 20 delimited at its upper part by a crown region 21, at its lower part by a bottom 22, as well as by a wall 35 which defines an annular passage 36 having a radial evolution as a function of the angle  and finally a wall 23 located substantially in the extension of the rim 34 of turbine 25, and which defines together with an extension 35 'of the wall 35, a annular passage 38 having an axial evolution corresponding to an increasing height towards exit 40 of the kicker.

    Comme le montre plus particulièrement la figure 3b, la spirale formée par la paroi 35 (et son prolongement 35') présente une expansion radiale en fonction de l'angle  (pris dans un plan perpendiculaire à l'axe de rotation de la turbine 25). Cette expansion radiale est relativement faible afin de limiter l'encombrement du pulseur et elle est donnée par la formule r = ro exp ( Io π  / 180° )    avec 6,5.10-2 ≤ Io ≤ 8.10-2 et notamment Io = 7,2.10-2
       pour compris entre O° et M.    As shown more particularly in FIG. 3b, the spiral formed by the wall 35 (and its extension 35 ') has a radial expansion as a function of the angle  (taken in a plane perpendicular to the axis of rotation of the turbine 25 ). This radial expansion is relatively small in order to limit the size of the blower and is given by the formula r = r o exp (I o π  / 180 °) with 6.5.10 -2 ≤ Io ≤ 8.10 -2 and in particular Io = 7.2.10 -2
    for between O ° and  M.

     = 0° correspond au début de l'expansion radiale, au voisinage du bord 43 de la sortie 40, et M correspond à la fin de l'expansion radiale, au voisinage du bord 44 de la sortie 40. = 0 ° corresponds to the start of the radial expansion, in the vicinity of the edge 43 of the outlet 40, and  M corresponds to the end of the radial expansion, in the vicinity of the edge 44 of the outlet 40.

    Comme le montrent plus particulièrement les figures 2a,2b et 3a, la volute 20 présente également une expansion axiale, définissant un couloir annulaire 28 prolongeant en direction du moteur 28 le couloir annulaire 36. Le couloir annulaire 38 est délimité par le prolongement 35' de la paroi en spirale 35, le fond 22, et la paroi 23.As shown more particularly by Figures 2a, 2b and 3a, the volute 20 also has a axial expansion, defining an annular passage 28 extending towards the motor 28 the corridor annular 36. The annular passage 38 is delimited by the extension 35 ′ of the spiral wall 35, the bottom 22, and the wall 23.

    Le couloir annulaire 38 a une hauteur h' qui varie de 0 pour  = 0, jusqu'à h'M pour  = M.The annular passage 38 has a height h 'which varies from 0 for  = 0, up to h' M for  =  M.

    La dimension axiale de la volute varie donc de H'o pour  = 0 jusqu'à H'M pour  = M avec H'M = H'o + h'M.The axial dimension of the volute therefore varies from H ' o for  = 0 to H' M for  =  M with H ' M = H' o + h ' M.

    L'évolution axiale est avantageusement choisie de manière que 0,67 ≤ ro/H'M ≤ 0,8    et en particulier ro/H'M = 0,7. The axial evolution is advantageously chosen so that 0.67 ≤ r o / H ' M ≤ 0.8 and especially r o / H ' M = 0.7.

    Comme le montre la figure 4, ces valeurs correspondent à des performances tout à fait satisfaisantes tant en ce qui concerne le rendement (courbe I) que la pression d'air en sortie (courbe II), qui confèrent au pulseur des caractéristiques remarquables en dépit d'un faible encombrement.As shown in Figure 4, these values match performance quite satisfactory both in terms of performance (curve I) than the outlet air pressure (curve II), which give the kicker characteristics remarkable despite a small footprint.

    Comme le montrent les figures 5a et 5b, les ailettes 26 présentent à leur extrémité située du côté de l'entrée d'air 50 un biseau concave 27 de hauteur hb qui longe une région incurvée correspondante 24 faisant partie d'un boítier supérieur de la volute 20. Si on désigne par la hauteur de la pale 26, il est avantageux que hb/hp ≃ 0,1. Ceci permet d'améliorer les performances aérodynamiques du pulseur (d'environ 10 à 15 %) et de diminuer le bruit généré par celui-ci (d'environ 2 à 3 dBA).As shown in Figures 5a and 5b, the fins 26 have at their end located on the side of the air inlet 50 a concave bevel 27 of height h b which runs along a corresponding curved region 24 forming part of an upper housing of the volute 20. If the height of the blade 26 is designated, it is advantageous that h b / h p ≃ 0.1. This makes it possible to improve the aerodynamic performance of the blower (by approximately 10 to 15%) and to reduce the noise generated by it (by approximately 2 to 3 dBA).

    Les extrémités 27 et 27' des pales 26 sont reliées entre elles par des bandeaux 22 et 32 qui occupent une partie de la largeur des pales 26, sans se recouvrir, de manière à permettre un démoulage axial de l'ensemble constitué par les pales 26, les bandeaux 12 et 32 et le bol conique 29 solidaire du bandeau 32 et qui vient s'engager sur l'axe 30.The ends 27 and 27 ′ of the blades 26 are interconnected by strips 22 and 32 which occupy part of the width of the blades 26, without cover, so as to allow axial demoulding of the assembly constituted by the blades 26, the strips 12 and 32 and the conical bowl 29 secured to the strip 32 and which comes to engage on axis 30.

    Alternativement (figure 5b), le bandeau supérieur 37 est disposé sur la face longitudinale externe des pales 26 et le bandeau inférieur 39 solidaire du bol 29 occupe une majeure partie ou la totalité de l'extrémité 27', ce qui permet également de démouler l'ensemble.Alternatively (Figure 5b), the strip upper 37 is arranged on the longitudinal face outer of the blades 26 and the lower strip 39 secured of bowl 29 occupies most or all of the 27 ′ end, which also makes it possible to demold all.

    Claims (6)

    Installation de chauffage-climatisation présentant au moins un pulseur centrifuge comportant au moins une turbine annulaire pourvue d'ailettes, qui est entraínée en rotation autour d'un axe de rotation par un moteur, cette turbine annulaire étant entourée par une volute définissant un espace de transmission de l'air sortant, par effet centrifuge, de la périphérie de la turbine annulaire, pour le diriger vers une région de sortie du pulseur, la volute présentant une paroi interne de rayon r présentant une évolution angulaire exponentielle en fonction d'un angle  pris dans un plan perpendiculaire à l'axe de rotation, conforme à la relation : r = ro exp ( Io π  / 180° )    pour  compris entre 0° et M ro = rayon de la paroi interne pour  = 0° Io = constante d'évolution exponentielle, caractérisée en ce que : 6,5.10-2  ≤ Io ≤ 8.10-2    et en ce que la paroi interne (35) de la volute (20) présente une hauteur croissante en fonction de l'angle  depuis une valeur H'o pour  = 0 jusqu'à une valeur H'M pour  = M, avec 0,67 ≤ ro/H'M ≤ 0,8 Heating-air conditioning installation having at least one centrifugal fan comprising at least one annular turbine provided with fins, which is rotated about an axis of rotation by a motor, this annular turbine being surrounded by a volute defining a space of transmission of the air leaving, by centrifugal effect, from the periphery of the annular turbine, to direct it towards an outlet region of the blower, the volute having an internal wall of radius r having an exponential angular evolution as a function of an angle  taken in a plane perpendicular to the axis of rotation, conforming to the relation: r = r o exp (I o π  / 180 °) for  between 0 ° and  M r o = radius of the internal wall for  = 0 ° I o = constant of exponential evolution, characterized in that: 6.5.10 -2  ≤ Io ≤ 8.10 -2 and in that the internal wall (35) of the volute (20) has an increasing height as a function of the angle  from a value H ' o for  = 0 to a value H' M for  =  M , with 0.67 ≤ r o / H ' M ≤ 0.8 Installation selon la revendication 1, caractérisée en ce que : Io ≃ 7,2.10-2. Installation according to claim 1, characterized in that: Io ≃ 7.2.10 -2 . Installation selon une des revendications 1 ou 2 caractérisée en ce que : ro/H'M ≃ 0,7. Installation according to one of claims 1 or 2 characterized in that: r o / H ' M ≃ 0.7. Installation selon une des revendications précédentes, caractérisée en ce que ro/H'o ≃ 1. Installation according to one of the preceding claims, characterized in that r o / H ' o ≃ 1. Installation selon une des revendications précédentes caractérisée en ce que l'extrémité axiale (27) des ailettes (26) située du côté d'une entrée d'air (50) du pulseur, présente des biseaux concaves de hauteur (hb) longeant une paroi incurvée complémentaire (24).Installation according to one of the preceding claims, characterized in that the axial end (27) of the fins (26) situated on the side of an air inlet (50) of the blower, has concave bevels of height (h b ) along a complementary curved wall (24). Installation selon la revendication 5, caractérisée en ce que hb/hp ≃ 0,1.    hp désignant la hauteur d'une pale.Installation according to claim 5, characterized in that h b / h p ≃ 0.1. h p denoting the height of a blade.
    EP20000126610 1999-12-06 2000-12-04 Fan casing Expired - Lifetime EP1106837B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    FR9915344 1999-12-06
    FR9915344A FR2801941B1 (en) 1999-12-06 1999-12-06 HEATING-AIR CONDITIONING SYSTEM COMPRISING AT LEAST ONE CENTRIFUGAL PULSE

    Publications (2)

    Publication Number Publication Date
    EP1106837A1 true EP1106837A1 (en) 2001-06-13
    EP1106837B1 EP1106837B1 (en) 2006-04-19

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    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP20000126610 Expired - Lifetime EP1106837B1 (en) 1999-12-06 2000-12-04 Fan casing

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    EP (1) EP1106837B1 (en)
    DE (1) DE60027393T2 (en)
    ES (1) ES2262481T3 (en)
    FR (1) FR2801941B1 (en)

    Cited By (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    EP2381110A2 (en) 2010-04-22 2011-10-26 Behr GmbH & Co. KG Motor vehicle air conditioning
    DE102010028067A1 (en) 2010-04-22 2011-10-27 Behr Gmbh & Co. Kg Air conditioning system for cooling or warming air that is supplied to inner compartment of motor vehicle, has heating device warming air that is supplied to compartment, and running wheel provided with shield to shield water from motor
    EP2634434A4 (en) * 2010-10-25 2017-11-15 Mitsubishi Heavy Industries, Ltd. Multi-blade centrifugal fan and air conditioner using same

    Families Citing this family (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    FR2868813B1 (en) * 2004-04-09 2006-06-16 Valeo Climatisation Sa AIR CENTRIFUGAL PROPULSION DEVICE FOR A HEATING, VENTILATION AND / OR AIR CONDITIONING INSTALLATION OF A VEHICLE HABITACLE, IN PARTICULAR
    US9568017B2 (en) 2014-04-30 2017-02-14 Denso International America, Inc. Quieter centrifugal blower with suppressed BPF tone
    CN117663253A (en) * 2022-08-23 2024-03-08 广东美的暖通设备有限公司 Fan and air conditioner

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    GB2057567A (en) * 1979-08-24 1981-04-01 Borg Warner Expanding scroll diffuser for radial flow impeller
    DE4331606C1 (en) * 1993-09-17 1994-10-06 Gutehoffnungshuette Man Spiral housing for turbo-engines (rotary engines, turbomachines)
    JPH09158898A (en) 1995-12-05 1997-06-17 Denso Corp Centrifugal blower
    JPH09242696A (en) 1996-03-11 1997-09-16 Denso Corp Centrifugal blower
    EP0846868A2 (en) * 1996-12-05 1998-06-10 General Motors Corporation Centrifugal blower assembly

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    GB2057567A (en) * 1979-08-24 1981-04-01 Borg Warner Expanding scroll diffuser for radial flow impeller
    DE4331606C1 (en) * 1993-09-17 1994-10-06 Gutehoffnungshuette Man Spiral housing for turbo-engines (rotary engines, turbomachines)
    JPH09158898A (en) 1995-12-05 1997-06-17 Denso Corp Centrifugal blower
    US5839879A (en) * 1995-12-05 1998-11-24 Denso Corporation Centrifugal blower
    JPH09242696A (en) 1996-03-11 1997-09-16 Denso Corp Centrifugal blower
    US5813831A (en) * 1996-03-11 1998-09-29 Denso Corporation Centrifugal blower having a bell-mouth ring for reducing noise
    EP0846868A2 (en) * 1996-12-05 1998-06-10 General Motors Corporation Centrifugal blower assembly

    Cited By (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    EP2381110A2 (en) 2010-04-22 2011-10-26 Behr GmbH & Co. KG Motor vehicle air conditioning
    DE102010028067A1 (en) 2010-04-22 2011-10-27 Behr Gmbh & Co. Kg Air conditioning system for cooling or warming air that is supplied to inner compartment of motor vehicle, has heating device warming air that is supplied to compartment, and running wheel provided with shield to shield water from motor
    EP2634434A4 (en) * 2010-10-25 2017-11-15 Mitsubishi Heavy Industries, Ltd. Multi-blade centrifugal fan and air conditioner using same

    Also Published As

    Publication number Publication date
    ES2262481T3 (en) 2006-12-01
    FR2801941B1 (en) 2002-02-08
    DE60027393T2 (en) 2007-05-10
    FR2801941A1 (en) 2001-06-08
    EP1106837B1 (en) 2006-04-19
    DE60027393D1 (en) 2006-05-24

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