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WO2019003786A1 - Soufflante centrifuge - Google Patents

Soufflante centrifuge Download PDF

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Publication number
WO2019003786A1
WO2019003786A1 PCT/JP2018/020862 JP2018020862W WO2019003786A1 WO 2019003786 A1 WO2019003786 A1 WO 2019003786A1 JP 2018020862 W JP2018020862 W JP 2018020862W WO 2019003786 A1 WO2019003786 A1 WO 2019003786A1
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WO
WIPO (PCT)
Prior art keywords
fan
holder
air
centrifugal fan
centrifugal
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.)
Ceased
Application number
PCT/JP2018/020862
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English (en)
Japanese (ja)
Inventor
落合　利徳
修三 小田
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.)
Denso Corp
Original Assignee
Denso Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Denso Corp filed Critical Denso Corp
Publication of WO2019003786A1 publication Critical patent/WO2019003786A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal 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

Definitions

  • the present disclosure relates to a centrifugal fan that blows air.
  • a blower is conventionally known that includes a centrifugal fan, a scroll case that is a fan accommodation unit that houses the centrifugal fan, a motor that drives the centrifugal fan, and a motor holder that holds the motor (see, for example, Patent Document 1).
  • the air blower described in Patent Document 1 is configured such that the motor holder is disposed on the air suction side of the centrifugal fan, and the motor is disposed in a cylindrical space formed in the central portion of the centrifugal fan.
  • the blower be accommodated in the fan accommodating portion in a state where the centrifugal fan, the motor, and the motor holder are integrally assembled. For this reason, in the blower in which the motor holder is disposed on the air suction side of the centrifugal fan, the motor holder is fitted with the bell mouth portion forming the air inlet for guiding the air to the centrifugal fan and the fan housing portion. There may be a fitting portion. In this type of air blower, the motor holder and the fan housing are firmly fitted to each other by press fitting or the like in order to prevent the air from leaking from the fitting portion. is there.
  • the present disclosure provides a centrifugal fan capable of suppressing the noise generated from the vibration of the motor from being radiated from the fan housing while suppressing the air leakage from the fitting portion between the motor holder and the fan housing.
  • a centrifugal fan is Electric motor, A centrifugal fan that is rotationally driven by an electric motor to suck air from the fan inlet along the fan shaft center and blow out the air sucked from the fan inlet through the fan outlet in a direction crossing the fan shaft
  • a fan housing unit for housing a centrifugal fan, And a motor holder for holding the electric motor.
  • the fan housing portion has a suction side wall portion positioned on the fan inlet side of the centrifugal fan in a direction extending along the fan axis.
  • the motor holder has an air inlet port for guiding air to the centrifugal fan inside and an inlet port forming portion having a holder side fitting portion fitted to the suction side fitting portion provided on the suction side wall portion; And a holder connecting portion connected to the suction side wall portion.
  • a communication passage is formed between the peripheral portion of the air inlet in the inlet formation portion and the centrifugal fan, which communicates the fan outlet side with the fan inlet side.
  • the holder connecting portion is connected to the suction side wall portion by the fastening member in a state in which the holder side fitting portion and the suction side fitting portion are fitted with a gap.
  • the motor holder and the fan housing portion are connected by the holder connecting portion.
  • vibration generated by torque ripple at the time of rotation of the electric motor is transmitted to the fan housing via the motor holder. It becomes difficult to transmit. For this reason, it is possible to suppress that the noise generated due to the vibration of the electric motor is radiated from the fan housing portion.
  • a communication passage is formed between the centrifugal fan and the inlet forming portion provided with the holder side fitting portion, and the fan outlet and the fan inlet are communicated with each other.
  • the centrifugal fan sucks in air
  • the pressure on the fan inlet side of the centrifugal fan is lower than that on the fan outlet side and the outside of the fan housing.
  • the air blown out from the fan outlet is dominantly flown to the fan inlet side via the communication passage, so the gap between the holder side fitting portion and the suction side fitting portion
  • air does not easily leak to the outside of the fan housing.
  • centrifugal fan of the present disclosure it is possible to suppress the air leakage from the fitting portion between the motor holder and the fan housing, and to suppress the noise generated from the vibration of the motor from the fan housing. can do.
  • FIG. 3 is a cross-sectional view taken along the line III-III in FIG.
  • FIG. 13 is a view in the direction of arrow XIII in FIG. 12;
  • the centrifugal blower 10 of the present disclosure is applied to a circulator that circulates the air in a vehicle compartment.
  • the centrifugal blower 10 is disposed between a top plate of the vehicle and an interior material (e.g., a roof lining) which constitutes a ceiling portion of the vehicle interior.
  • the centrifugal fan 10 includes a casing 20, a centrifugal fan 50 disposed inside the casing 20, an electric motor 60 for driving the centrifugal fan 50, and a motor holder 70 for holding the electric motor 60. Equipped with
  • the centrifugal fan 50 is a fan that sucks in air along the fan axis CLf shown in FIG. 3 and blows out the sucked air in a direction intersecting the fan axis CLf.
  • the fan axial center CLf is an axial center which is a rotation center of the centrifugal fan 50.
  • a direction extending along the fan axial center CLf may be referred to as a fan axial direction AD, and a direction orthogonal to the fan axial center CLf may be referred to as a fan radial direction RD.
  • the centrifugal fan 50 includes a plurality of blades 52, a fan side plate 54 connecting one side of the plurality of blades 52 in the fan axial direction AD, and a fan main plate 56 connecting the other side of the plurality of blades 52 in the fan axial direction AD. It is configured.
  • the plurality of blades 52 are arranged side by side so as to surround the fan axis CLf. Between the adjacent blades 52, an inter-blade passage 500 through which air flows is formed. Each blade 52 has a leading edge 521 that forms an air inlet in the inter-blade passage 500 and a trailing edge 522 that forms an air outlet in the inter-blade passage 500. A fan outlet 523 for blowing air from the centrifugal fan 50 is formed between the trailing edges 522 of the adjacent blades 52.
  • the fan side plate 54 is formed of a ring-shaped member whose central portion is open.
  • the fan side plate 54 is connected to one end of each blade 52 in the fan axial direction AD.
  • the fan side plate 54 is formed with a fan inlet 541 for sucking air into the centrifugal fan 50.
  • the fan main plate 56 is formed of a disk-shaped member.
  • the fan main plate 56 is connected to the other end of each blade 52 in the fan axial direction AD.
  • a connecting portion 562 for connecting a rotating shaft 62 of the electric motor 60 described later is provided.
  • the connecting portion 562 is a portion for fixing the centrifugal fan 50 to the rotating shaft 62 so that the centrifugal fan 50 rotates with the rotating shaft 62.
  • the centrifugal fan 50 is configured as a single-piece molding resin-molded so that the plurality of blades 52 constituting the centrifugal fan 50, the fan side plate 54, and the fan main plate 56 are integrated.
  • the centrifugal fan 50 configured in this manner is housed inside the casing 20 in a posture in which the fan axial center CLf extends in the vertical direction.
  • the centrifugal fan 50 of the present embodiment is housed inside the casing 20 in a posture in which the fan side plate 54 is positioned below the fan main plate 56 and the fan inlet 541 is opened downward. .
  • the casing 20 accommodates the centrifugal fan 50 and forms an air introduction passage 240 for introducing external air to the centrifugal fan 50.
  • the casing 20 is configured to include a fan housing portion 22 for housing the centrifugal fan 50 and an introduction path forming portion 24 forming the air introduction path 240.
  • the fan housing portion 22 is formed of a spiral scroll case forming a spiral air passage 220 outside the fan radial direction RD of the centrifugal fan 50 in a state where the centrifugal fan 50 is housed inside.
  • the fan housing portion 22 has a suction side wall portion 221 located on the fan suction port 541 side of the centrifugal fan 50 in the fan axial direction AD.
  • the suction side wall portion 221 extends along the fan radial direction RD.
  • a housing opening 222a is formed at the inner end 222 thereof for housing the fan motor unit integrally forming the centrifugal fan 50 and the electric motor 60 in the fan housing 22. There is.
  • the housing opening 222 a has an outer shape larger than the outer shape of the centrifugal fan 50 in the fan axial direction AD.
  • the centrifugal fan 10 can accommodate a fan motor unit, which is a unit of the centrifugal fan 50 and the electric motor 60, inside the fan housing 22 or can be taken out from the fan housing 22.
  • the fan housing portion 22 is provided with a cold air intake port 224 for taking in part of the air blown out from the centrifugal fan 50 as cooling air for cooling the electric motor 60.
  • the cold air intake port 224 is provided immediately after the tongue portion 225 where the static pressure is most likely to be high in the air flow path 220 inside the fan housing portion 22.
  • the fan housing portion 22 is formed with a pair of air outlets 223 a and 223 b for blowing the air from the centrifugal fan 50 outside the fan radial direction RD.
  • the pair of air outlets 223a and 223b are formed to face each other with the centrifugal fan 50 interposed therebetween.
  • the pair of air outlets 223a and 223b constitute an external discharge unit that discharges the air blown out from the centrifugal fan 50 to the outside.
  • the fan housing portion 22 has an upper divided body 226 and a lower divided body 227, and is an assembled body in which the divided bodies 226, 227 are assembled in the fan axial direction AD. It consists of The upper side division body 226 and the lower side division body 227 which comprise the fan accommodating part 22 are assembled
  • the lower side division body 227 is comprised including the above-mentioned suction side wall part 221. As shown in FIG.
  • the suction side wall portion 221 is a portion extending in the fan radial direction RD in the lower side divided body 227.
  • a convex portion 23 protruding toward the air introduction passage 240 is provided at an inner end portion 222 forming the housing opening portion 222a.
  • the convex part 23 is comprised cyclically
  • the convex portion 23 constitutes a suction side fitting portion that fits into a concave portion 762 of the introduction port forming portion 76 described later.
  • the suction side wall portion 221 is provided with a fastening hole portion 228 a to be a pilot hole of a fastening member (for example, tapping screw) 90 for coupling with a holder connecting portion 74 described later.
  • a fastening member for example, tapping screw
  • Three 228c are formed. The number of fastening holes 228a to 228c can be appropriately changed according to the number of parts connected with the holder connecting part 74.
  • An introduction path forming portion 24 is connected to the fan housing portion 22.
  • the introduction passage forming portion 24 forms an air introduction passage 240 for flowing air from the outside in one direction intersecting with the fan axis CLf and guiding it to the centrifugal fan 50 between the suction side wall portion 221 of the lower divided body 227 It is
  • the air introduction path 240 extends in any one direction (for example, the longitudinal direction of the vehicle) in the fan radial direction RD.
  • the introduction passage forming portion 24 has a bottom wall portion 241 extending along the fan radial direction RD, and a side wall portion 242 connected to the bottom wall portion 241 and connected to the suction side wall portion 221.
  • the bottom wall portion 241 of the introduction passage forming portion 24 has a size that covers the entire suction side wall portion 221.
  • the introduction passage forming portion 24 is formed with an external opening 240 a for taking in air from the outside in the uppermost stream of the air flow in the air introduction passage 240.
  • the electric motor 60 for driving the centrifugal fan 50 is accommodated in the casing 20 configured as described above.
  • the electric motor 60 of the present embodiment is configured of an inner rotor type brushless motor.
  • the electric motor 60 includes a housing 61 made of metal.
  • the casing 61 is configured to include a bottomed cylindrical casing cylindrical portion 611 and a casing bottom portion 612 that closes an opening on one end side of the casing cylindrical portion 611.
  • the bottom surface portion of the casing cylindrical portion 611 and the casing bottom portion 612 are provided with bearings 63 and 64 for rotatably supporting the rotating shaft 62.
  • a rotor 65 including a permanent magnet is fixed to the rotating shaft 62.
  • the rotor 65 is disposed inside the housing 61.
  • a cylindrical stator 66 in which a coil is wound around a core is fixed to the inside of the casing cylindrical portion 611.
  • the stator 66 is disposed inside the housing 61 in a state in which the core portion is in contact with the inner circumferential surface of the housing cylindrical portion 611.
  • a circuit board 67 as an electric circuit is disposed on the side of the fan side plate 54 inside the housing 61.
  • a motor drive circuit, a motor protection circuit, and the like that control the energization of the coils of the stator 66 according to the rotational position of the rotor 65 are mounted.
  • the electric motor 60 configured in this manner is held by the motor holder 70 in a state where a part of the electric motor 60 is positioned inside the centrifugal fan 50.
  • the motor holder 70 is a member that holds the electric motor 60.
  • the motor holder 70 has a bottomed cylindrical holder cylinder 72 for holding the housing 61 of the electric motor 60, and a holder connecting part 74 for connecting the holder cylinder 72 to the casing 20, It is configured to include the inlet formation portion 76.
  • the holder cylinder 72 is positioned inside the centrifugal fan 50.
  • a housing 61 of the electric motor 60 is held inside the holder cylindrical portion 72.
  • the inner peripheral surface of the holder cylinder portion 72 is uneven so that a part thereof abuts on the outer peripheral surface of the housing 61 of the electric motor 60.
  • a gap is provided between the holder cylindrical portion 72 and the casing 61 of the electric motor 60, and the gap forms a cooling air passage for circulating the air for cooling the electric motor 60. ing.
  • the holder connecting portion 74 has three holder leg portions 741, 742, 743 protruding radially outward from the outer peripheral side of the holder cylindrical portion 72. Each holder leg 741, 742, 743 extends radially outward of the holder cylindrical portion 72 so as to block a part of the housing opening 222 a.
  • Insertion holes 741a, 742a, 743a, through which the fastening member 90 can be inserted, are formed in the respective holder leg portions 741, 742, 743 on the outer side in the radial direction.
  • Each holder leg 741, 742, 743 has a radially outer portion connected to the suction side wall 221 of the casing 20 by a fastening member 90.
  • the holder leg 741 extending toward the tongue 225 of the casing 20 is hollow. Although this holder leg 741 is not shown, a cooling air introduction path for guiding the cold air taken in from the cold air intake port 224 to the cooling air passage between the electric motor 60 and the holder cylinder 72 is formed in its inside. There is.
  • the holder connection part 74 may be comprised by four or more holder leg parts.
  • the inlet formation portion 76 is formed in a substantially annular shape so as to cover a part of the accommodation opening 222 a of the suction side wall 221.
  • the air inlet formation portion 76 has an air inlet 760 for guiding air to the centrifugal fan 50 formed inside, and a groove shaped concave portion 762 fitted on the convex portion 23 of the suction side wall 221 on the outside. ing.
  • the concave portion 762 provided in the introduction port forming portion 76 constitutes a holder side fitting portion that is fitted to the convex portion 23 which is the suction side fitting portion.
  • the detail of the fitting structure of the inlet formation part 76 and the suction side wall part 221 is mentioned later.
  • the inlet formation portion 76 is configured such that the peripheral portion of the air inlet 760 overlaps the fan side plate 54 with a predetermined gap in the fan axial direction AD.
  • a communication passage 700 is formed between the peripheral edge portion of the air inlet 760 and the centrifugal fan 50 in the inlet formation portion 76, which communicates the fan outlet 523 side with the fan inlet 541 side.
  • the inlet formation portion 76 faces the inner end portion 542 of the fan side plate 54 so that air flowing backward from the fan outlet 523 to the fan inlet 541 can easily flow to the inside of the centrifugal fan 50 through the communication passage 700.
  • the portion is shaped (e.g., U-shaped) to cover the inner end portion 542.
  • the introduction port forming portion 76 is provided with annular or arc-shaped reinforcing ribs 766 and 768 on the inside and the outside, respectively.
  • the reinforcing ribs 766, 768 project toward the air introduction passage 240 so as not to interfere with the centrifugal fan 50.
  • the holder cylindrical portion 72, the holder connecting portion 74, and the inlet formation portion 76 which are constituent elements, are configured as an integral molding by injection molding using a resin material.
  • the concave portion 762 of the inlet formation portion 76 and the convex portion 23 provided on the suction side wall portion 221 are fitted to each other. And the suction side wall portion 221 by the fastening member 90.
  • FIG. 7 is a schematic view corresponding to a portion VIII of FIG. 3 in a centrifugal fan CE which is a comparative example of the present embodiment.
  • the same reference numerals are assigned to configurations corresponding to the centrifugal fan 10 of the present embodiment in the centrifugal fan CE of the comparative example.
  • the concave portion 762 of the inlet forming portion 76 and the convex portion 23 of the suction side wall portion 221 are close fit (that is, press fit). It is connected to the suction side wall 221 by the fastening member 90 in a firmly fitted state.
  • the concave portion 762 of the inlet formation portion 76 and the convex portion 23 of the suction side wall portion 221 are firmly fitted without a gap, so the inlet side formation portion 76 and the suction side wall portion
  • the structure is such that air does not leak from the fitting portion with 221.
  • the concave portion 762 of the inlet formation portion 76 and the convex portion 23 of the suction side wall portion 221 form a gap. It has a structure to be held together. That is, the holder connecting portion 74 of the centrifugal blower 10 of the present embodiment is engaged by the fastening member 90 in a fitting state in which the concave portion 762 of the introduction port forming portion 76 and the convex portion 23 of the suction side wall portion 221 are clearance fit. It is connected to the suction side wall 221.
  • the concave portion 762 has an inner side wall portion 762a, an outer side wall portion 762b, and a bottom wall portion 762c.
  • the convex portion 23 has an inner side surface portion 231 facing the inner side wall portion 762a, an outer side surface portion 232 facing the outer side wall portion 762b, and a tip end portion 233 facing the bottom surface wall portion 762c.
  • the concave portion 762 and the convex portion 23 are set to have dimensions such that a gap Ga is generated between the inner side wall portion 762 a and the inner side surface portion 231 and a gap Gb is generated between the outer wall portion 762 b and the outer side surface portion 232.
  • the convex portion 23 is set to a dimension in which the gap Gc is generated between the convex portion 23 and the bottom wall portion 762 c of the concave portion 762.
  • Each of the gaps Ga to Gc is smaller than the passage width Gd in the communication passage 700. Thereby, the pressure loss in each of the gaps Ga to Gc is larger than the pressure loss in the communication passage 700.
  • the centrifugal fan 10 when electric power is supplied to the electric motor 60, the centrifugal fan 50 is rotationally driven. Then, when the centrifugal fan 50 sucks air from the air inlet 760, the region R1 in the vicinity of the air inlet 760 has a negative pressure.
  • the air sucked into the centrifugal fan 50 is pressurized inside the centrifugal fan 50, and the direction thereof is diverted from the fan axial direction AD to the outside of the fan radial direction RD as shown by the arrow F2 in FIG. Thereafter, as shown by arrow F3 in FIG. 9, the air pressurized inside the centrifugal fan 50 is blown out to the air flow path 220 of the fan housing portion 22 (that is, the region R3 in FIG. 9). And the air which blew off to the ventilation path 220 blows off to the exterior of the casing 20 from a pair of air blower outlets 223a and 223b.
  • the concave portion 762 of the introduction port forming portion 76 and the convex portion 23 of the suction side wall portion 221 are fitted with a gap. For this reason, there is a concern that part of the air blown out from the fan outlet 523 of the centrifugal fan 50 may leak to the air introduction path 240 side via the gap between the concave portion 762 and the convex portion 23.
  • the communication passage 700 is formed between the inlet formation portion 76 and the fan side plate 54.
  • the pressure in the region R1 on the fan suction port 541 side is lower than that in the region R2 on the air introduction passage 240 side because the centrifugal fan 50 sucks in air.
  • the region R2 on the air introduction passage 240 side communicates with the outside, and has a pressure equal to the atmospheric pressure.
  • noise generated due to the vibration of the electric motor 60 is a fan housing portion while suppressing air leakage from the fitting portion between the motor holder 70 and the fan housing portion 22. It is possible to suppress emission from 22.
  • the inventors investigated the relationship between the fitting state of the fan housing 22 and the motor holder 70 and the vibration magnification. Specifically, as shown in FIG. 10, the present inventors set the vibration magnification when changing the average amount of interference, which is the average value of the amount of interference between the convex portion 23 and the concave portion 762 in the circumferential direction. investigated.
  • the vibration magnification is obtained by dividing the case average vibration, which is the average value of the vibration acceleration of the fan housing portion 22 of the casing 20, by the motor vibration, which is the vibration acceleration of the electric motor 60. Further, when the interference average amount increases beyond “0”, the convex portion 23 and the concave portion 762 are strongly connected as the interference average amount increases. On the other hand, when the interference average amount decreases below “0”, the gap between the convex portion 23 and the concave portion 762 increases as the interference average amount decreases.
  • the average interference amount is negative.
  • the convex portion 23 and the concave portion 762 are press-fit as in the comparative example.
  • the vibration magnification is smaller than that of the structure connected by For this reason, the centrifugal blower 10 of the present embodiment has a structure in which the vibration of the electric motor 60 is less likely to be transmitted to the fan housing portion 22 of the casing 20.
  • the gaps Ga to Gc formed between the convex portion 23 and the concave portion 762 are smaller than the passage width Gd through which air flows in the communication passage 700. According to this, since the air blown out from the fan outlet 523 is likely to flow to the fan inlet 541 side through the communication passage 700, each gap Ga formed between the convex portion 23 and the concave portion 762 Leakage of air from Gc can be further suppressed.
  • the centrifugal blower 10 of the present embodiment is provided with a plurality of air blowout ports 223a and 223b for discharging the air to the outside with respect to the fan accommodation portion 22 configuring the scroll case.
  • the pressure on the fan outlet 523 side of the centrifugal fan 50 is less likely to increase, as compared with the configuration in which the fan housing portion 22 is provided with a single air outlet.
  • the pressure difference between the pressure on the fan outlet 523 side of the centrifugal fan 50 and the pressure between the outside of the fan accommodation portion 22 is reduced. Leakage of air to the outside can be further suppressed.
  • a second embodiment will be described with reference to FIGS. 11 to 13.
  • a structure for suppressing transmission of the vibration of the electric motor 60 to the fan housing portion 22 via the holder connecting portion 74 will be described.
  • parts different from the first embodiment will be mainly described.
  • the holder connecting portion 74 of the present embodiment is configured similarly to the characteristic structure of each of the holder legs 741 to 743. Therefore, in the present embodiment, the structure of the holder leg 742 among the holder legs 741 to 743 of the holder connecting part 74 will be representatively described, and the description of the holder legs 741 and 743 will be omitted.
  • the holder leg 742 of the holder connecting portion 74 has an abutting portion 742b in contact with the fastening member 90 near the insertion hole 742a of the fastening member 90, and a peripheral portion 742c surrounding the abutment portion 742b, It has an outer site 742 d surrounding the surrounding site 742 c.
  • the surrounding portion 742c is made of a material having a lower elastic modulus than the abutting portion 742b and the outer portion 742d.
  • the contact portion 742 b and the outer portion 742 d have a certain degree of elasticity and a resin material excellent in strength (For example, polypropylene).
  • the surrounding portion 742c is made of a rubber-based material (e.g., an elastomer) having a lower elastic modulus than the contact portion 742b and the outer portion 742d.
  • the contact portion 742b, the peripheral portion 742c, and the outer portion 742d are configured as an integral molding.
  • Such an integrally molded product can be produced, for example, by two-color molding of a resin material and a rubber material.
  • the other configuration is the same as that of the first embodiment.
  • the centrifugal blower 10 of the present embodiment can obtain the same advantages as the first embodiment, with the same advantages as those of the first embodiment.
  • the peripheral portion 742c of the holder connecting portion 74 is made of a material having a lower elastic modulus than the contact portion 742b and the outer portion 742d. According to this, the vibration generated by the torque ripple at the time of rotation of the electric motor 60 is attenuated at the peripheral portion 742 c of the holder connecting portion 74. For this reason, it becomes difficult for the vibration generated by the torque ripple at the time of rotation of the electric motor 60 to be transmitted to the fan housing portion 22 via the holder connecting portion 74.
  • centrifugal fan 10 of the present embodiment it is possible to sufficiently suppress that the vibration generated by the torque ripple at the time of rotation of the electric motor 60 is transmitted to the fan housing portion 22.
  • the contact portion 742b, the peripheral portion 742c, and the outer portion 742d of the holder leg portion 742 are configured as an integral molding. According to this, the number of parts of the centrifugal fan 10 can be reduced compared to the case where the contact portion 742b, the peripheral portion 742c, and the outer portion 742d of the holder leg 742 are separately configured. As a result, mass productivity of the centrifugal fan 10 can be improved.
  • the gaps Ga to Gc formed between the convex portion 23 and the concave portion 762 are smaller than the passage width Gd through which air flows in the communication passage 700.
  • the centrifugal blower 10 for example, at least a portion of each of the gaps Ga to Gc formed between the convex portion 23 and the concave portion 762 is larger than the passage width Gd through which air flows in the communication passage 700. It is also good.
  • centrifugal blower 10 may have, for example, a configuration in which a single air outlet is provided in the fan housing 22 or a configuration in which three or more air outlets are provided in the fan housing 22.
  • the suction side fitting part is comprised by the convex-shaped part 23 and the holder side fitting part was demonstrated by the concave-shaped part 762 in each above-mentioned embodiment, it is not limited to this.
  • the suction side fitting portion may be configured by a concave portion
  • the holder side fitting portion may be configured by a convex portion.
  • centrifugal blower 10 of this indication can be applied to, for example, a blower of a vehicle air conditioner and a blower of a seat air conditioner.
  • the centrifugal blower 10 of this indication is widely applicable not only to a vehicle but to the air blower etc. which are utilized for a house, a factory, etc.
  • the centrifugal fan includes an electric motor, a centrifugal fan, a fan housing, and a motor holder.
  • the fan housing has a suction side wall located on the fan inlet side of the centrifugal fan.
  • the motor holder has an air inlet port for guiding air to the centrifugal fan inside and an inlet port forming portion having a holder side fitting portion fitted to the suction side fitting portion provided on the suction side wall portion; And a holder connecting portion connected to the suction side wall portion.
  • a communication passage is formed between the peripheral portion of the air inlet in the inlet formation portion and the centrifugal fan, which communicates the fan outlet side with the fan inlet side.
  • the holder connecting portion is connected to the suction side wall portion by the fastening member in a state in which the holder side fitting portion and the suction side fitting portion are fitted with a gap.
  • the gap formed between the holder side fitting portion and the suction side fitting portion is smaller than the passage width through which air flows in the communication passage. According to this, since the air blown out from the fan outlet becomes easy to flow to the fan inlet side through the communication path, the gap between the holder side fitting portion and the suction side fitting portion to the outside of the fan housing portion Air leakage can be further suppressed.
  • the fan housing portion of the centrifugal blower is formed of a spiral scroll case having a plurality of external discharge portions for discharging the air blown out of the centrifugal fan to the outside.
  • the pressure on the fan outlet side of the centrifugal fan is increased compared to the case where a single external discharge part is provided. It becomes difficult. As a result, the pressure difference between the pressure on the fan outlet side of the centrifugal fan and the pressure between the outside of the fan storage unit is reduced, so air from the gap between the holder side fitting portion and the suction side fitting portion to the outside of the fan housing portion Leakage can be further suppressed.
  • the holder connection portion of the centrifugal blower includes an abutting portion that abuts on the fastening member, and a peripheral portion surrounding the periphery of the abutting portion. And a surrounding site
  • At least the contact portion and the peripheral portion of the holder connecting portion of the centrifugal blower are configured as an integrally molded product. According to this, it is possible to reduce the number of parts of the centrifugal fan as compared to the case where the contact portion and the peripheral portion of the holder connecting portion are separately configured. As a result, mass productivity of the centrifugal fan can be improved.

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

Abstract

L'invention concerne une soufflante centrifuge pourvue d'un moteur électrique (60), d'un ventilateur centrifuge (50), d'une section contenant un ventilateur (22) et d'un support de moteur (70). La section contenant un ventilateur a une paroi côté admission (221) située côté ouverture d'admission de ventilateur du ventilateur centrifuge dans la direction de l'axe du ventilateur. Le support de moteur est pourvu d'une section formant une ouverture d'introduction (76) qui possède une ouverture d'introduction d'air (760) formée sur son côté interne permettant d'introduire de l'air dans le ventilateur centrifuge et qui possède une section d'insertion côté support (762) s'insérant dans la section d'insertion côté admission (23) de la paroi côté admission. Le support de moteur est pourvu d'une section de liaison de support (74) reliée à la paroi côté admission. Un passage de communication (700) permettant de fournir une communication entre le côté ouverture d'évacuation de ventilateur et le côté ouverture d'admission de ventilateur est formé entre le ventilateur centrifuge et la partie bord périphérique de l'ouverture d'introduction d'air. La section de liaison de support est reliée à la paroi côté admission par un élément de fixation (90) alors que la section d'insertion côté support et la section d'insertion côté admission sont montées l'une à l'autre avec un espace se trouvant entre les deux sections.
PCT/JP2018/020862 2017-06-26 2018-05-30 Soufflante centrifuge Ceased WO2019003786A1 (fr)

Applications Claiming Priority (2)

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JP2017-124350 2017-06-26
JP2017124350A JP6690603B2 (ja) 2017-06-26 2017-06-26 遠心送風機

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WO2019003786A1 true WO2019003786A1 (fr) 2019-01-03

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WO (1) WO2019003786A1 (fr)

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Publication number Priority date Publication date Assignee Title
KR102771639B1 (ko) * 2022-09-26 2025-02-20 에스케이매직 주식회사 통기홀이 구비된 모터하우징 어셈블리 및 이를 포함하는 공기청정기

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002161888A (ja) * 2000-11-29 2002-06-07 Daikin Ind Ltd ファン装置
JP2009236434A (ja) * 2008-03-28 2009-10-15 Kubota Corp ファン装置の取付構造
WO2016158154A1 (fr) * 2015-03-30 2016-10-06 株式会社デンソー Dispositif de soufflante

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002161888A (ja) * 2000-11-29 2002-06-07 Daikin Ind Ltd ファン装置
JP2009236434A (ja) * 2008-03-28 2009-10-15 Kubota Corp ファン装置の取付構造
WO2016158154A1 (fr) * 2015-03-30 2016-10-06 株式会社デンソー Dispositif de soufflante

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JP6690603B2 (ja) 2020-04-28

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