EP2957773B1 - Climatiseur - Google Patents

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Publication number
EP2957773B1
EP2957773B1 EP13875217.5A EP13875217A EP2957773B1 EP 2957773 B1 EP2957773 B1 EP 2957773B1 EP 13875217 A EP13875217 A EP 13875217A EP 2957773 B1 EP2957773 B1 EP 2957773B1
Authority
EP
European Patent Office
Prior art keywords
level
difference
vane
difference portion
deviation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP13875217.5A
Other languages
German (de)
English (en)
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EP2957773A1 (fr
EP2957773A4 (fr
Inventor
Satoshi Nakai
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.)
Daikin Industries Ltd
Original Assignee
Daikin Industries Ltd
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Filing date
Publication date
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Publication of EP2957773A1 publication Critical patent/EP2957773A1/fr
Publication of EP2957773A4 publication Critical patent/EP2957773A4/fr
Application granted granted Critical
Publication of EP2957773B1 publication Critical patent/EP2957773B1/fr
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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
    • F04D29/40—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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/02—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal
    • F04D17/04—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal of transverse-flow type
    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • F04D29/282—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis
    • F04D29/283—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis rotors of the squirrel-cage type
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/663—Sound attenuation
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/663—Sound attenuation
    • F04D29/665—Sound attenuation by means of resonance chambers or interference
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/68—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers
    • F04D29/681—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0018—Indoor units, e.g. fan coil units characterised by fans
    • F24F1/0025—Cross-flow or tangential fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise

Definitions

  • the present invention relates to an air conditioner including a cross flow fan.
  • a cross flow fan is a blower which extends in the axial direction and includes a plurality of vanes lined up in the rotational direction.
  • the cross flow fan used in an air conditioner is arranged such that vane wheels each having vanes are lined up in the axial direction and connected with one another.
  • a stabilizer and a rear guider are provided to oppose the outer periphery of the fan, respectively.
  • the stabilizer is termed a front tongue portion, whereas a part of the rear guider which part extends from the leading end portion to the portion closest to the fan is termed a rear tongue portion.
  • These tongue portions form an air passage on the blow-out side of the fan. Between each tongue portion and the fan, a vortex airflow is generated. When a vane of the fan passes this vortex airflow, wind noise (NZ noise) is generated on account of the interference between the vortex airflow and the vane.
  • NZ noise wind noise
  • timings of generation of wind noise are dispersed by differentiating the positions of the vanes of neighboring vane wheels or changing the shape of the tongue portions.
  • Patent Document 1 recites that positions where a front tongue portion and a rear tongue portion are closest to the fan are differentiated in the rotational axis direction between the vane wheels. To put it differently, the front tongue portion and the rear tongue portion have level-difference portions each at a position of opposing to the connecting portion of the vane wheels. With this arrangement, because the timing at which the vane passes the leading end of the front tongue portion or the rear tongue portion is different between the vane wheels, the timings of the generation of the wind noise are dispersed and the wind noise is reduced.
  • Patent Document 2 describes a cross flow fan wherein the number of concaves and convexes at an irregular part formed on the end of a stabilizer is made equal to the number of cross flow fans arranged in series and the convexes are made to correspond to the positions of the side of the fans, in order to reduce noise.
  • the Patent Documents 3 to 6 describe similar cross flow fans.
  • An object of the present invention is to provide an air conditioner in which wind noise is further reduced.
  • a air conditioner includes: a cross flow fan in which vane wheels each including vanes lined up in a circumferential direction are lined up in an axial direction; and a stabilizer and a rear guider which are provided on respective sides of an outer periphery of the cross flow fan to form an air passage, a leading end portion of at least one of the stabilizer and the rear guider having a multi-stage shape so as to include level-difference portions which are deviated in the circumferential direction of the cross flow fan, and the level-difference portions including at least one first level-difference portion which opposes an intermediate portion in the axial direction of corresponding one of the vane wheels, wherein vanes of a vane wheel opposing the first level-difference portion and of a vane wheel neighboring to this vane wheel being provided to be deviated from one another by a predetermined angle in the circumferential direction, and in a direction from one end to the other end in the axial direction, the direction of deviation in
  • the leading end portion of at least one of the rear guider and the stabilizer has the first level-difference portion which is deviated in the circumferential direction and opposes the intermediate part in the axial direction of the vane wheel, and hence the time duration over which one vane passes the leading end of the stabilizer or the rear guider is divided into before and after reaching the first level-difference portion. Therefore the wind noise is not generated at once by one vane, and the wind noise is generated in a divided manner. In this way, the wind noise is reduced.
  • the air conditioner of the first aspect is arranged so that the level-difference portions include a second level-difference portion which opposes a connecting portion between the vane wheels.
  • the leading end portion of the stabilizer or the rear guider has the second level-difference portion which is deviated in the circumferential direction and opposes the connecting portion between the vane wheels. With this, the timing of the generation of the wind noise is differentiated between the vane wheels, with the result that the wind noise is further reduced.
  • the air conditioner of the first or second aspect is arranged so that the height of a part between neighboring two of the level-difference portions is constant in the axial direction.
  • the stabilizer or the rear guider because in the leading end portion of the stabilizer or the rear guider the part between the two neighboring level-difference portions linearly extends in the axial direction, the stabilizer or the rear guider is easily manufactured.
  • the air conditioner of the third aspect is arranged so that the level-difference portions include the at least one first level-difference portion which include one or more first level-difference portion opposing the intermediate portion in the axial direction of each of neighboring two of the vane wheels and a second level-difference portion opposing a connecting portion of the neighboring two vane wheels, in a direction from one end to the other end in the axial direction, a direction of deviation in the circumferential direction of the first level-difference portion is opposite to a direction of deviation in the circumferential direction of the second level-difference portion, and parts of the leading end portion which parts oppose the neighboring two of the vane wheels are identical in shape and height.
  • the leading end portion of the stabilizer or the rear guider has the first level-difference portion in the range opposing neighboring two of the vane wheels, and the parts, which oppose the two vane wheels, of the leading end portion of the rear guider or the stabilizer are identical in shape and height. It is therefore easy to manufacture the rear guider or the stabilizer. Furthermore, the leading end portion of the rear guider or the stabilizer is arranged to be substantially identical in height overall.
  • the air conditioner of the fifth aspect is arranged so that the deviation angle in the circumferential direction of the first level-difference portion is identical with a value calculated by dividing the predetermined angle by a result of addition of 1 to the number of the first level-difference portions within a range in the axial direction of the vane wheel opposing the first level-difference portion, and the deviation angle in the circumferential direction of the second level-difference portion is identical with a total sum of the deviation angle in the circumferential direction of the first level-difference portion within the range in the axial direction.
  • the leading end portion of at least one of the rear guider and the stabilizer has the first level-difference portion which is deviated in the circumferential direction and opposes the intermediate part in the axial direction of the vane wheel, and hence the time duration over which one vane passes the leading end of the stabilizer or the rear guider 20 is divided into before and after reaching the first level-difference portion. Therefore the wind noise is not generated at once by one vane, and the wind noise is generated in a divided manner. In this way, the wind noise is reduced.
  • the stabilizer or the rear guider is easily manufactured.
  • the leading end portion of the stabilizer or the rear guider has the first level-difference portion in the range opposing neighboring two of the vane wheels, and the parts, which oppose the two vane wheels, of the leading end portion of the rear guider or the stabilizer are identical in shape and height. It is therefore easy to manufacture the rear guider or the stabilizer. Furthermore, the leading end portion of the rear guider or the stabilizer is arranged to be substantially identical in height overall.
  • the direction of deviation of the first level-difference portion is opposite to the direction of deviation of the second level-difference portion
  • the direction of deviation of the vanes deviated from each other at the predetermined angle is opposite to the direction of deviation of the first level-difference portion
  • the deviation angle of the second level-difference portion is smaller than the predetermined angle.
  • the direction of temporal deviation of two wind noises generated before and after reaching the first level-difference portion is identical with the direction of temporal deviation of two wind noises generated before and after reaching the second level-difference portion.
  • the wind noise is sequentially generated from one end to the other end in the axial direction of the cross flow fan. This restrains the directivity due to the interference of wind noises generated between the level-difference portions, and noise reduction is effectively done across the entire room.
  • two wind noises generated before and after reaching the first level-difference portion are deviated from each other by the deviation angle angle of the first level-difference portion (the value calculated by dividing the deviation angle (the predetermined angle) between the vanes by a result of addition of 1 to the number of the first level-difference portions within the range in the axial direction of the vane wheel), whereas two wind noises generated before and after reaching the second level-difference portion are deviated from each other by an angle calculated by subtracting the deviation angle angle of the second level-difference portion from the deviation angle (predetermined angle) between the vanes.
  • the deviation time between the two wind noises generated before and after reaching the first level-difference portion is arranged to be identical with the deviation time between the two wind noises generated before and after reaching the second level-difference portion.
  • the present embodiment therefore achieves a noise reduction effect similar to the noise reduction effect in case where the first level-difference portion is not provided and the number of the vane wheels is increased so that each connecting portion of the vane wheels is provided to oppose the position equivalent to the first level-difference portion.
  • the vane length of the vane wheel is elongated and the number of the vane wheels is reduced, while the noise reduction capability is maintained.
  • the blowing characteristic is improved because the number of the connecting portions of the vane wheels, which hinder the ventilation, is reduced.
  • frontward a direction of protrusion from the wall to which the indoor unit 1 is attached
  • backward the direction opposite to the frontward
  • left-right direction in FIG. 1 will be simply referred to as “left-right direction”.
  • the indoor unit 1 includes a casing 2 and internal devices stored in the casing 2 such as a heat exchanger 3, a cross flow fan 10, a filter 4, and an electronic component box (not illustrated).
  • a heat exchanger 3 Through the upper surface of the casing 2 is formed an inlet port 2a, whereas through the lower surface of the casing 2 is formed an outlet port 2b.
  • a horizontal flap 5 is provided for adjusting the wind direction in the up-down direction and for opening and closing the outlet port 2b.
  • the cross flow fan 10 (hereinafter, this will be simply referred to as a fan 10) is disposed so that its axial direction is in parallel to the left-right direction. This fan 10 rotates in the direction indicated by the arrow in FIG. 2 .
  • a front guider 30 and a rear guider (rear tongue portion) 20 are provided, respectively, to form an air passage.
  • a substantial upper half of the front guider 30 is constituted by a stabilizer (front tongue portion) 32.
  • the heat exchanger 3 is disposed to surround the front side and the upper side of the fan 10. In an air conditioning operation, the fan 10 is driven so that indoor air is sucked through the inlet port 2a, and the sucked air is heated or cooled in the heat exchanger 3 and is then blown out through the outlet port 2b.
  • the fan 10 is constituted by a plurality of (six in the present embodiment) vane wheels 12 lined up in the axial direction (left-right direction) and an end plate 11.
  • the end plate 11 constitutes the right end portion of the fan 10. From a central portion of the right surface of the end plate 11, a boss portion 11a protrudes to be connected with the rotational axis of a motor (not illustrated) for driving the fan 10.
  • the leftmost vane wheel 12B among the six vane wheels 12 is made up of vanes 15 lined up in the circumferential direction and a substantially disc-shaped end plate 14 which is connected to the left ends of the vanes 15.
  • the vanes 15 are integrated with the end plate 14.
  • the right end of each vane 15 of the vane wheel 12B is joined by welding or the like with the supporting plate 13 of the neighboring vane wheel 12A.
  • a shaft (not illustrated) which is rotatably supported by a bearing attached to the casing 2 protrudes.
  • the vanes 15 of each vane wheel 12 extend in the axial direction (left-right direction), and each of which is disposed as a forward-swept wing at a predetermined blade angle.
  • the lengths of the vanes 15 of each of the five vane wheels 12A are identical in the axial direction and each of the vanes 15 is substantially twice as long as the length of each of the vanes 15 of the vane wheel 12B in the axial direction.
  • the vanes 15 of each vane wheel 12 are lined up in the circumferential direction at irregular intervals.
  • the intervals of the vanes 15 are identical between the six vane wheels 12.
  • the vanes 15 may be lined up at regular intervals.
  • vanes 15 of one vane wheel 12 and the vanes 15 of the neighboring vane wheel 12 are deviated from one another in the circumferential direction.
  • vanes 15 of any given vane wheel 12 are deviated from the vanes 15 of the vane wheel 12 immediately to the left of the any given vane wheel 12 each by an angle ⁇ in the rotational direction (indicated by the arrow in FIG. 4 ).
  • each vane 15 is deviated from the corresponding vane 15 of the neighboring vane wheel 12 by the angle ⁇ in the rotational direction.
  • the rear guider 20 is provided to the back of the fan 10, and the lower edge of the rear guider 20 is connected to the outlet port 2b (see FIG. 2 ).
  • the length in the left-right direction of the rear guider 20 is substantially identical with the length in the left-right direction of the fan 10, and the rear guider 20 opposes substantially the entirety of the fan 10 in the left-right direction.
  • the upper edge of the rear guider 20 is slightly above the upper edge of the fan 10 (see FIG. 2 and FIG. 6 ).
  • a part which is not the upper and lower end portions is a curved surface 21 which is substantially arc-shaped.
  • the distance (shortest distance) between the curved surface 21 and the outer periphery of the fan 10 decreases upward.
  • the rear guider 20 includes a protruding portion 22 at a part above the curved surface 21 (i.e., to the leading end side of the curved surface 21).
  • the protruding portion 22 is substantially arc-shaped and bulges in the direction away from the fan 10 in cross section orthogonal to the left-right direction. The distance (shortest distance) between the protruding portion 22 and the outer periphery of the fan 10 increases upward.
  • the rear guider 20 is closest to the fan 10 at a border 20a (hereinafter, closest position 20a) between the lower edge of each protruding portion 22 and the upper edge of the curved surface 21.
  • the protruding portion 22 is constituted by divisional pieces 23 and 24 which are alternately lined up in the left-right direction.
  • the protruding portion 22 is constituted by six divisional pieces 23 and five divisional pieces 24.
  • Each of the divisional pieces 23 and 24 linearly extends along the left-right direction, and each divisional piece 23 is deviated from each divisional piece 24 by an angle ⁇ 1 in the circumferential direction of the fan 10 (see FIG. 7 ).
  • the cross sectional shape of each divisional piece 23 in the direction orthogonal to the left-right direction is substantially identical with the cross sectional shape of each divisional piece 24 in the direction orthogonal to the left-right direction.
  • the upper edges of the six divisional pieces 23 are at the same height. Furthermore, the upper edges of the five divisional pieces 24 are at the same height.
  • the right five divisional pieces 23 among the six divisional pieces 23 are identical in length in the left-right direction, and each of which is substantially half as long as the vane 15 of the vane wheel 12A in the left-right direction.
  • the leftmost divisional piece 23 is substantially as long as the vane 15 of the vane wheel 12B in the left-right direction.
  • the five divisional pieces 24 are identical in length in the left-right direction, and each of which is substantially half as long as the vane 15 of the vane wheel 12A in the left-right direction.
  • each divisional piece 23 is deviated from the divisional piece 24 adjacent on the left by an angle ⁇ 1, in the direction opposite to the rotational direction (indicated by the arrow in FIG. 11 ) of the fan 10.
  • the level-difference portion 26 is deviated by the angle ⁇ 1 in the direction opposite to the rotational direction when viewed from left to right
  • the level-difference portion 25 is deviated by the angle ⁇ 1 in the rotational direction of the fan 10 when viewed from left to right.
  • the direction of deviation between the two vanes 15 of the neighboring two vane wheels 12, which are deviated from each other by the angle ⁇ , is identical with the direction of deviation of the level-difference portion 25 in the circumferential direction and is opposite to the direction of deviation of the level-difference portion 26 in the circumferential direction.
  • the angle ⁇ 1 is substantially half as large as the deviation angle ⁇ between the vanes 15 of the neighboring two vane wheels 12.
  • a part which is not the upper and lower end portions is a curved surface 33 which is substantially arc-shaped.
  • the distance (shortest distance) between the curved surface 33 and the outer periphery of the fan 10 decreases upward.
  • the stabilizer 32 includes a bending surface 34 which is bent to extend substantially frontward from the lower edge of the curved surface 33. The lower edge of the bending surface 34 is connected to the front wall portion 31.
  • the stabilizer 32 includes a flat end face 35 which extends downward and frontward from the upper edge of the curved surface 33 and a convex portion 36 which is provided to the front of the end face 35 and protrudes upward to be higher than the end face 35.
  • the convex portion 36 and the end face 35 constitute the upper end portion of the rear guider 20.
  • the stabilizer 32 is closest to the outer periphery of the fan 10 at an upper edge 32a (hereinafter, closest position 32a) of the curved surface 33.
  • the stabilizer 32 (the convex portion 36, the end face 35, the curved surface 33, and the bending surface 34) is formed of divisional pieces 37 and 38 which are alternately lined up in the left-right direction.
  • the stabilizer 32 is formed of six divisional pieces 37 and five divisional pieces 38.
  • Each of the divisional pieces 37 and 38 linearly extends along the left-right direction, and each divisional piece 37 and each divisional piece 38 are deviated from each other by an angle ⁇ 1 in the circumferential direction of the fan 10 (see FIG. 9 ).
  • the cross sectional shape of each divisional piece 37 in the direction orthogonal to the left-right direction is substantially identical with the cross sectional shape of each divisional piece 38 in the direction orthogonal to the left-right direction.
  • the upper edges of the six divisional pieces 37 are at the same height. Furthermore, the upper edges of the five divisional pieces 38 are at the same height.
  • each divisional piece 37 is deviated from the divisional piece 38 adjacent on the left by an angle ⁇ 1, in the direction opposite to the rotational direction of the fan 10.
  • the level-difference portion 40 is deviated by the angle ⁇ 1 in the direction opposite to the rotational direction when viewed from left to right
  • the level-difference portion 39 is deviated by the angle ⁇ 1 in the rotational direction of the fan 10 when viewed from left to right.
  • FIG. 11 shows only the right three vane wheels 12 among the six vane wheels 12. Furthermore, among the vanes 15 of these three vane wheels 12, the figure shows only three vanes 15 each of which is deviated from the left one in the rotational direction by the angle ⁇ .
  • the leading end portion of each of the rear guider 20 and the stabilizer 32 has the level-difference portion (first level-difference portion) 26, 40 which is deviated in the circumferential direction and opposes the intermediate part in the axial direction of the vane wheel 12A, and hence the time duration over which one vane 15 passes the leading end of the stabilizer 32 or the rear guider 20 is divided into before and after reaching the first level-difference portion 26, 40. Therefore the wind noise is not generated at once by one vane 15, and the wind noise is generated in a divided manner. In this way, the wind noise is reduced.
  • first level-difference portion first level-difference portion
  • the leading end portion of each of the rear guider 20 and the stabilizer 32 has the level-difference portion (second level-difference portion) 25, 39 which is deviated in the circumferential direction and opposes the connecting portion between the vane wheels 12. With this, the timing of the generation of the wind noise is differentiated between the vane wheels 12, with the result that the wind noise is further reduced.
  • the direction of deviation of the first level-difference portion 26, 40 is opposite to the direction of deviation of the second level-difference portion 25, 39
  • the direction of deviation of the vanes 15 deviated from each other at the angle ⁇ is opposite to the direction of deviation of the first level-difference portion 26, 40
  • the deviation angle of the second level-difference portion 25, 39 is smaller than the angle ⁇ .
  • the direction of temporal deviation of two wind noises generated before and after reaching the first level-difference portion 26, 40 is identical with the direction of temporal deviation of two wind noises generated before and after reaching the second level-difference portion 25, 39.
  • the direction of deviation of the first level-difference portion 26, 40 is opposite to the direction of deviation between the vanes 15 whereas the direction of deviation of the second level-difference portion 25, 39 is identical with the direction of deviation between the vanes 15, the direction of deviation of the first level-difference portion 26, 40 may be identical with the direction of deviation between the vanes 15 whereas the direction of deviation of the second level-difference portion 25, 39 may be opposite to the direction of deviation between the vanes 15.
  • the rear guider 20 has only one first level-difference portion 26, 40 within a range of one vane wheel 12A in the axial direction, two or more first level-difference portions 126 and 127 may be provided within a range of one vane wheel 12A in the axial direction as in the case of a rear guider 120 shown in FIG. 12 , for example.
  • a deviation angle ⁇ 2 of a second level-difference portion 125 is preferably identical with the total sum of deviation angles ⁇ 3 and ⁇ 4 of the first level-difference portions 126 and 127 within a range of one vane wheel 12A in the axial direction. Furthermore, each of the deviation angles ⁇ 3 and ⁇ 4 of the first level-difference portions 126 and 127 is preferably at a value calculated by dividing the deviation angle ⁇ between the vanes 15 by a number which is a result of addition of 1 to the number of the first level-difference portions within the range of the vane wheel 12A in the axial direction.
  • This arrangement makes it possible to cause the deviation time between the wind noises generated before and after reaching the first level-difference portion 126, 127 to be identical with the deviation time between the wind noises generated before and after reaching the second level-difference portion 125.
  • the deviation angles of the two or more first level-difference portions provided within the range of one vane wheel in the axial direction may be different from the above.
  • the deviation angles of the two or more first level-difference portions may be identical with one another or different from one another.
  • two or more first level-difference portions may be provided within the range of one vane wheel 12A in the axial direction.
  • parts of the leading end portion of the rear guider 20 are identical with one another in shape and height in the range opposing the five vane wheels 12A, the parts may be different from one another.
  • the number of the first level-difference portions, the deviation angles, or the directions of deviation may be different between the vane wheels 12A.
  • the first level-difference portion may be provided to oppose an intermediate part in the axial direction of only one or some vane wheel 12A among the five vane wheels 12A.
  • the second level-difference portion may be provided to oppose only one or more connecting portion among the connecting portions of the six vane wheels 12.
  • parts opposing the five vane wheels 12A may be different from one another in shape and height.
  • each of the divisional pieces 228 may be gradually varied in the axial direction as in the case of a rear guider 220 shown in FIG. 13 .
  • the cross sectional shape in the axial direction of each divisional piece 228 is substantially constant. This makes it possible to sequentially generate the wind noise generated when the vane 15 passes one divisional piece 228.
  • the level-difference portions 229 on the respective sides of the divisional piece 228 oppose a central portion in the axial direction of the vane wheel 12A (or an end portion of the vane wheel 12) and the connecting portion between the vane wheels 12, respectively.
  • each divisional piece 241 may be gradually changed in the axial direction as in the case of a stabilizer 232 of a front guider 230 shown in FIG. 14 , for example.
  • the level-difference portions 242 on the respective sides of the divisional piece 241 opposes a central portion in the axial direction of the vane wheel 12A (or the end portion of the vane wheel 12) and the connecting portion between the vane wheels 12, respectively.
  • the deviated part of the rear guider 20 may range from the leading end to an intermediate part of the curved surface 21.
  • the lower edges of the divisional pieces 23 and 24 may be above the border between the protruding portion 22 and the curved surface21.
  • the entirety of the stabilizer 32 in the up-down direction is multi-staged in the circumferential direction
  • only a part of the stabilizer 32 on the leading end side may be multi-staged in the circumferential direction.
  • the lower edges of the divisional pieces 37 and 38 may be above the lower edge of the stabilizer 32.
  • only the end face 35 and the convex portion 36 are multi-staged in the circumferential direction, and a part of the stabilizer 32 which part extends from the leading end to an intermediate part of the curved surface 33 may be multi-staged in shape in the circumferential direction.
  • a multi-stage shape is formed as both of the rear guider 20 and the stabilizer 32 have the first level-difference portions opposing the intermediate portions in the axial direction of the vane wheel 12A
  • only one of the rear guider 20 and the stabilizer 32 may have a multi-stage shape including the first level-difference portion opposing the intermediate portion in the axial direction of the vane wheel 12A, while the other does not have the first level-difference portion (i.e., the level-difference portion is not provided at all, or a multi-stage shape in which only the second level-difference portions opposing the connecting portions of the vane wheel 12).
  • the cross sectional shape of the rear guider 20 in the direction orthogonal to the left-right direction is constituted by the arc-shaped curved surface 21 and the protruding portion 22 which is substantially arc-shaped in cross section and above the curved surface 21.
  • the cross sectional shape of the rear guider may be different from this shape.
  • the cross sectional shape may be arranged such that a protruding portion which is substantially arc-shaped on the fan 10 side and is flat on the side opposite to the fan 10 is formed above the curved surface 21.
  • the cross sectional shape of the rear guider 20 is different from the shape described in the embodiment above, at least a part of the rear guider which part ranges from the closest position where the rear guider 20 is closest to the fan 10 to the leading end is deviated in the circumferential direction (i.e., a divisional piece).
  • the cross sectional shape of the stabilizer 32 in the direction orthogonal to the left-right direction is arranged such that the flat end face 35 and the convex portion 36 substantially triangular in cross section are provided above the curved surface 33.
  • the cross sectional shape of the stabilizer may be different from this shape.
  • no end face 35 may be provided and the convex portion 36 may be connected to the upper edge of the curved surface 33.
  • at least a part of the stabilizer 32 which part ranges from the closest position where the stabilizer 32 is closest to the fan 10 to the leading end is deviated in the circumferential direction (i.e., a divisional piece).
  • the present invention may be applicable to other purposes.
  • the present invention may be employed in a floor-mounted indoor unit which is arranged to suck indoor air from a lower part of the indoor unit and blow out the air from an upper part of the indoor unit.
  • the present invention makes it possible to further reduce wind noise.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Air-Conditioning Room Units, And Self-Contained Units In General (AREA)

Claims (6)

  1. Climatiseur comprenait
    un ventilateur à flux transversal (10) dans lequel des roues à ailettes (12A, 12B) incluant chacune des ailettes (15) alignées dans une direction circonférentielle sont alignées dans une direction axiale ; et
    un stabilisateur (32, 232) et un orienteur arrière (20, 120, 220) qui sont prévus sur des côtés respectifs d'une périphérie extérieure du ventilateur à flux transversal (10) pour former un passage d'air,
    une portion d'extrémité d'attaque d'au moins un du stabilisateur (32, 232) et de l'orienteur arrière (20, 120, 220) ayant une forme à plusieurs étages afin d'inclure des portions de différence de niveau qui sont déviées dans la direction circonférentielle du ventilateur à flux transversal (10), et
    les portions de différence de niveau incluant au moins une première portion de différence de niveau (26, 126, 127) qui fait face à une portion intermédiaire dans la direction axiale d'une correspondante des roues à ailettes (12A, 12B)
    caractérisé en ce que
    des ailettes (15) d'une roue à ailettes (12A, 12B) opposée à la première portion de différence de niveau et d'une roue à ailettes (12A, 12B) voisine de cette roue à ailettes (12A, 12B) étant prévues pour être déviées les unes par rapport aux autres d'un angle prédéterminé dans la direction circonférentielle, et
    dans un sens allant d'une extrémité à l'autre extrémité dans la direction axiale, le sens de déviation dans la direction circonférentielle de la première portion de différence de niveau (26, 126, 127) étant opposé au sens de déviation dans la direction circonférentielle des ailettes (15) des deux roues à ailettes voisines (12A, 12B).
  2. Climatiseur selon la revendication 1, dans lequel, les portions de différence de niveau incluent une seconde portion de différence de niveau (25, 125) qui s'oppose à une portion de connexion entre les roues à ailettes (12A, 12B).
  3. Climatiseur selon la revendication 1 ou 2, dans lequel la hauteur d'une partie entre deux voisines des portions de différence de niveau est constante dans la direction axiale.
  4. Climatiseur selon la revendication 3, dans lequel,
    les portions de différence de niveau incluent la au moins une première portion de différence de niveau (26, 126, 127) qui inclut une ou plusieurs premières portions de différence de niveau (26, 126, 127) opposées à la portion intermédiaire dans la direction axiale de chacune de deux voisines des roues à ailettes (12A, 12B) et une seconde portion de différence de niveau (25, 125) opposée à une portion de connexion des deux roues à ailettes voisines (12A, 12B),
    dans un sens allant d'une extrémité à l'autre extrémité dans la direction axiale, un sens de déviation dans la direction circonférentielle de la première portion de différence de niveau (26, 126, 127) est opposé à un sens de déviation dans la direction circonférentielle de la seconde portion de différence de niveau (25,125), et
    des parties de la portion d'extrémité d'attaque, lesquelles parties s'opposent aux deux voisines des roues à ailettes (12A, 12B), sont identiques en ce qui concerne la forme et la hauteur.
  5. Climatiseur selon la revendication 3, dans lequel,
    les portions de différence de niveau incluent deux secondes portions de différence de niveau (25, 125) qui s'opposent à des portions de connexion entre la roue à ailettes (12) opposée à la première portion de différence de niveau (26, 126, 127) et les roues à ailettes (12) sur les côtés respectifs de la roue à ailettes (12) opposée à la première portion de différence de niveau (26, 126, 127),
    dans un sens allant d'une extrémité à l'autre extrémité dans la direction axiale, un sens de déviation dans la direction circonférentielle de la première portion de différence de niveau (26, 126, 127) est opposé à un sens de déviation dans la direction circonférentielle de la seconde portion de différence de niveau (25, 125), et
    un angle de déviation dans la direction circonférentielle de la seconde portion de différence de niveau (25, 125) est plus petit que l'angle prédéterminé.
  6. Climatiseur selon la revendication 5, dans lequel,
    l'angle de déviation dans la direction circonférentielle de la première portion de différence de niveau (26, 126, 127) est identique à une valeur calculée en divisant l'angle prédéterminé par un résultat d'addition de 1 au nombre des premières portions de différence de niveau (26, 126, 127) à l'intérieur d'une plage dans la direction axiale de la roue à ailettes (12) opposée à la première portion de différence de niveau, et
    l'angle de déviation dans la direction circonférentielle de la seconde portion de différence de niveau (25, 125) est identique à une somme totale de l'angle de déviation dans la direction circonférentielle de la première portion de différence de niveau (26, 126, 127) à l'intérieur de la plage dans la direction axiale.
EP13875217.5A 2013-02-12 2013-12-10 Climatiseur Active EP2957773B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013024108A JP5716766B2 (ja) 2013-02-12 2013-02-12 空気調和機
PCT/JP2013/083027 WO2014125711A1 (fr) 2013-02-12 2013-12-10 Climatiseur

Publications (3)

Publication Number Publication Date
EP2957773A1 EP2957773A1 (fr) 2015-12-23
EP2957773A4 EP2957773A4 (fr) 2016-08-03
EP2957773B1 true EP2957773B1 (fr) 2017-10-25

Family

ID=51353730

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Application Number Title Priority Date Filing Date
EP13875217.5A Active EP2957773B1 (fr) 2013-02-12 2013-12-10 Climatiseur

Country Status (5)

Country Link
EP (1) EP2957773B1 (fr)
JP (1) JP5716766B2 (fr)
CN (1) CN104981612B (fr)
ES (1) ES2649146T3 (fr)
WO (1) WO2014125711A1 (fr)

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KR20180044165A (ko) * 2016-10-21 2018-05-02 삼성전자주식회사 공기 조화기
CN108843603B (zh) * 2018-07-24 2020-01-21 威海市豪顿风机股份有限公司 并列离心风机
KR20210062846A (ko) * 2019-11-22 2021-06-01 삼성전자주식회사 공기조화기
KR200495130Y1 (ko) * 2020-06-11 2022-03-10 이선흥 다방향 및 냉풍흐름을 개선한 선풍기
CN112576524B (zh) * 2020-12-04 2023-04-14 重庆海尔空调器有限公司 贯流风扇及具有其的空调
JP7103465B1 (ja) 2021-03-31 2022-07-20 株式会社富士通ゼネラル 送風機および室内機

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Also Published As

Publication number Publication date
CN104981612B (zh) 2017-02-22
EP2957773A1 (fr) 2015-12-23
JP5716766B2 (ja) 2015-05-13
WO2014125711A1 (fr) 2014-08-21
ES2649146T3 (es) 2018-01-10
CN104981612A (zh) 2015-10-14
EP2957773A4 (fr) 2016-08-03
JP2014152724A (ja) 2014-08-25

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