WO2021111509A1 - 送風機及び空気調和装置 - Google Patents

送風機及び空気調和装置 Download PDF

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Publication number
WO2021111509A1
WO2021111509A1 PCT/JP2019/047124 JP2019047124W WO2021111509A1 WO 2021111509 A1 WO2021111509 A1 WO 2021111509A1 JP 2019047124 W JP2019047124 W JP 2019047124W WO 2021111509 A1 WO2021111509 A1 WO 2021111509A1
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WO
WIPO (PCT)
Prior art keywords
impeller
centrifugal fan
fan
blower
bell mouth
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/JP2019/047124
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English (en)
French (fr)
Japanese (ja)
Inventor
翔太 森川
健一 迫田
智哉 福井
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.)
Mitsubishi Electric Corp
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Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to PCT/JP2019/047124 priority Critical patent/WO2021111509A1/ja
Priority to JP2021562221A priority patent/JP7179202B2/ja
Publication of WO2021111509A1 publication Critical patent/WO2021111509A1/ja
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
    • F04D29/26—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

Definitions

  • the present invention relates to a blower including a centrifugal fan and an external fan provided outside the centrifugal fan.
  • the present invention also relates to an air conditioner provided with the blower.
  • the blower described in Patent Document 1 includes a plurality of centrifugal fans.
  • Each centrifugal fan is equipped with impellers in which the blade members are arranged in a ring shape at predetermined intervals. In these impellers, the end side in the rotation axis direction of the impeller serves as an air inlet.
  • the blower described in Patent Document 1 is provided with an annular end plate to which the end portions of each blade member of the impeller are connected to the end portion of the impeller on the side where the inflow port is formed.
  • the through hole formed in the end plate serves as the inflow port of the impeller.
  • each of the centrifugal fans is provided with a casing that covers the impeller.
  • the casing is formed with a suction port at a position facing the inflow port of the impeller covered with the casing.
  • each impeller is arranged along the rotation axis direction of each impeller.
  • the end plates of the two adjacent impellers are connected to each other by a plurality of rod-shaped members. That is, when a driving force is supplied to one of two adjacent impellers and the impeller rotates, the other of the two adjacent impellers also passes through a plurality of rod-shaped members connecting the end plates. It is configured to rotate.
  • the centrifugal fan will be referred to as a first centrifugal fan.
  • the impeller of the first centrifugal fan will be referred to as an impeller for the first centrifugal fan.
  • the centrifugal fan provided with the impeller connected to the impeller for the first centrifugal fan by a plurality of rod-shaped members becomes an external fan with respect to the first centrifugal fan.
  • Each centrifugal fan of the blower described in Patent Document 1 has a configuration in which air flows from the suction port of the casing toward the inlet of the impeller without any guidance and flows into the impeller. Therefore, in each centrifugal fan of the blower described in Patent Document 1, the flow of air flowing into the impeller is disturbed. Further, in each centrifugal fan of the blower described in Patent Document 1, a leak flow is generated, which is a flow in which the air blown from the impeller leaks from the suction port of the casing. Therefore, the blower described in Patent Document 1 has a problem that the blowing performance is lowered.
  • the present invention solves the above-mentioned problems, and is a blower including a centrifugal fan and an external fan provided outside the centrifugal fan, which can improve the blowing performance as compared with the conventional one.
  • the first purpose is to provide.
  • a second object of the present invention is to provide an air conditioner provided with such a blower.
  • the blower according to the present invention is a blower including a first centrifugal fan and an external fan provided outside the first centrifugal fan, and the first centrifugal fan is a plurality of blades for the first centrifugal fan.
  • a casing that covers the impeller for the first centrifugal fan and has a suction port formed at a position facing the first inflow port is provided, and the external fan includes an external impeller provided outside the casing.
  • the blower is a motor that supplies a driving force for rotating the impeller for the first centrifugal fan and the external impeller, and an end of the impeller for the first centrifugal fan on the side where the first inflow port is formed.
  • a first bell mouse which is connected to a portion and has a portion whose inner diameter increases as the distance from the first centrifugal fan impeller increases in the rotation axis direction of the first centrifugal fan impeller, is provided with the outer blade.
  • the car is connected to the first bell mouse, and when the driving force of the motor is supplied to one of the first centrifugal fan impeller and the external impeller, the driving force is the first bell. It is transmitted by the mouse to the other of the first centrifugal fan impeller and the external impeller, and the first centrifugal fan impeller, the first bell mouse, and the external impeller rotate together. There is.
  • the air conditioner according to the present invention includes a blower according to the present invention and a heat exchanger that exchanges heat between the air supplied from the blower and the refrigerant flowing inside.
  • the air flowing from the suction port of the casing to the first inflow port of the impeller for the first centrifugal fan is rectified by the first bell mouth. Therefore, in the first centrifugal fan of the blower according to the present invention, it is possible to suppress the disturbance of the air flow flowing into the impeller for the first centrifugal fan as compared with the conventional case. Further, in the first centrifugal fan of the blower according to the present invention, it is possible to suppress the occurrence of a leak flow, which is a flow in which the air blown from the impeller for the first centrifugal fan leaks from the suction port of the casing. Therefore, the blower according to the present invention can improve the blowing performance as compared with the conventional case.
  • blower which concerns on embodiment 1. It is a perspective view of the blower which concerns on embodiment 1. It is sectional drawing of the blower which concerns on a comparative example. It is a perspective view of the blower which concerns on embodiment 2. It is sectional drawing of the blower which concerns on embodiment 2. It is a perspective view of the blower which concerns on embodiment 3. It is a perspective view which shows an example of the blower which concerns on this Embodiment 4. It is a perspective view which shows another example of the blower which concerns on this Embodiment 4. It is sectional drawing of the indoor unit of the air conditioner which concerns on Embodiment 5.
  • FIG. 1 is a cross-sectional view of the blower according to the first embodiment.
  • FIG. 2 is a perspective view of the blower according to the first embodiment.
  • the broken line shown in FIG. 1 indicates the air flow in the blower 1 according to the first embodiment.
  • the blower 1 is used for, for example, air conditioning equipment, duct fans, ventilation fans, and the like.
  • the blower 1 includes a plurality of centrifugal fans 10 and a motor 30.
  • the motor 30 supplies the centrifugal fans 10 with a driving force for rotating the impellers of the centrifugal fans 10.
  • each of the centrifugal fans 10 includes an impeller 11 for a centrifugal fan and a casing 20.
  • the blower 1 provided with the two centrifugal fans 10 is illustrated.
  • the centrifugal fan impeller 11 includes a plurality of centrifugal fan blade members 12 extending in the rotation axis 16 direction of the centrifugal fan impeller 11. These centrifugal fan blade members 12 are arranged in an annular shape centered on the rotation shaft 16 at a predetermined interval. That is, the impeller 11 for the centrifugal fan has a substantially cylindrical shape. Further, in the centrifugal fan impeller 11, the end side in the rotation shaft 16 direction is the inflow port 13 into which air flows. In the first embodiment, a disk-shaped first end plate 14 is connected to one end of each centrifugal fan blade member 12 in the rotation axis 16 direction.
  • An annular second end plate 15 is connected to the other end of each centrifugal fan blade member 12 in the direction of the rotation shaft 16.
  • a through hole formed in a substantially central portion of the second end plate 15 serves as an inflow port 13 of the impeller 11 for a centrifugal fan.
  • the drive shaft 31 connected to the motor 30 is connected to the first end plate 14 of one of the plurality of centrifugal fans 10.
  • the motor 30 is provided outside the casing 20, which will be described later.
  • a part of the drive shaft 31 that connects the motor 30 and the first end plate 14 is inserted into the casing 20, which will be described later, and is connected to the first end plate 14.
  • FIG. 1 shows an example in which the drive shaft 31 is connected to the first end plate 14 of the centrifugal fan 10 on the right side of the paper surface.
  • the driving force of the motor 30 is supplied to the centrifugal fan impeller 11 provided with the first end plate 14 to which the drive shaft 31 is connected, and the centrifugal fan impeller 11 rotates about the rotating shaft 16.
  • the driving force of the motor 30 supplied to the centrifugal fan impeller 11 is transmitted to another centrifugal fan impeller 11 as described later, and another The impeller 11 for the centrifugal fan is also configured to rotate about the rotating shaft 16.
  • the centrifugal fan 10 is a sirocco fan. Therefore, each of the centrifugal fan blade members 12 of the centrifugal fan impeller 11 is arranged so that the end portion on the outer peripheral side is closer to the front side in the rotation direction of the centrifugal fan impeller 11 than the end portion on the inner peripheral side.
  • the centrifugal fan 10 is not limited to the sirocco fan.
  • the centrifugal fan 10 may be a turbo fan.
  • each of the centrifugal fan blade members 12 of the centrifugal fan impeller 11 is arranged so that the end portion on the outer peripheral side is rearward of the end portion on the inner peripheral side in the rotational direction of the centrifugal fan impeller 11.
  • centrifugal fan impeller 11 is of a single-sided suction type
  • the centrifugal fan impeller 11 may of course be a double-sided suction type. That is, the centrifugal fan impeller 11 may have inflow ports 13 formed at both ends in the rotation shaft 16 direction.
  • the casing 20 covers the impeller 11 for the centrifugal fan.
  • a suction port 21 is formed in the casing 20 at a position facing the inflow port 13 of the centrifugal fan impeller 11. Further, the casing 20 is also formed with an air outlet 25. Therefore, as the centrifugal fan impeller 11 rotates, the air outside the casing 20 passes through the suction port 21 of the casing 20 and the inflow port 13 of the centrifugal fan impeller 11, and the centrifugal fan impeller 11 Is sucked into. The air sucked into the centrifugal fan impeller 11 is blown into the casing 20 from between the centrifugal fan blade members 12. The air blown into the casing 20 is blown out of the casing 20 from the outlet 25 of the casing 20.
  • the casing 20 is a scroll type casing because the centrifugal fan 10 according to the first embodiment is a sirocco fan.
  • the casing 20 includes a main body portion 23 and a blowout portion 24.
  • the main body 23 is a portion of the casing 20 that covers the impeller 11 for a centrifugal fan, and has a substantially cylindrical shape. In a state where the main body 23 covers the centrifugal fan impeller 11, the end of the main body 23 faces the end of the substantially cylindrical centrifugal fan impeller 11.
  • a suction port 21 is formed at the end of the main body 23 at a position facing the inflow port 13 of the centrifugal fan impeller 11. Further, in a state where the main body 23 covers the centrifugal fan impeller 11, the curved surface portion of the main body 23 is arranged so as to surround the outside of each centrifugal fan blade member 12 of the centrifugal fan impeller 11. There is.
  • the outlet 24 has a tubular shape. One end of the blowout portion 24 is connected to the curved surface portion of the main body portion 23. Then, at the connection point between the main body 23 and the blowout portion 24, the main body 23 and the blowout portion 24 communicate with each other. Further, an outlet 25 is formed at the other end of the outlet 24. Therefore, in the centrifugal fan 10 using the casing 20 provided with the main body portion 23 and the blowing portion 24, the air outside the casing 20 is discharged to the suction port 21 of the casing 20 and the suction port 21 of the casing 20 by the rotation of the impeller 11 for the centrifugal fan.
  • the casing 20 is made of resin, for example.
  • the casing 20 is formed by, for example, a die-cutting process.
  • the blower 1 further includes a plurality of tubular bell mouths 40 connected to the centrifugal fan impeller 11 of each centrifugal fan 10.
  • the end 41 of the bell mouth 40 is connected to the end of the centrifugal fan impeller 11 on the side where the inflow port 13 is formed inside the casing 20.
  • the end 41 of the bell mouth 40 is connected to the second end plate 15 of the impeller 11 for a centrifugal fan.
  • the connection point between the bell mouth 40 and the impeller 11 for the centrifugal fan is inside the casing 20.
  • the inner diameter of the bell mouth 40 increases as the distance from the connected centrifugal fan impeller 11 in the direction of the rotation axis 16 of the centrifugal fan impeller 11. That is, the inner diameter of the bell mouth 40 increases from the end 41 connected to the centrifugal fan impeller 11 toward the end 42 opposite to the end 41.
  • a part of the bell mouth 40 is arranged outside the casing 20 through the suction port 21.
  • the bell mouth 40 and the suction port 21 of the casing 20 have the following dimensional relationship.
  • the distance from the rotating shaft 16 of the centrifugal fan impeller 11 to the edge 22 of the suction port 21 of the casing 20 in the direction perpendicular to the rotating shaft 16 of the centrifugal fan impeller 11 is defined as the first distance.
  • the distance from the rotating shaft 16 of the centrifugal fan impeller 11 to the inner peripheral surface of the bell mouth 40 in the direction perpendicular to the rotating shaft 16 of the centrifugal fan impeller 11 is defined as the second distance.
  • the bell mouth 40 has a portion where the second distance is larger than the first distance in the portion arranged outside the casing 20.
  • the distance L1 is defined as the distance from the rotating shaft 16 of the centrifugal fan impeller 11 to the edge 22 of the suction port 21 of the casing 20 in the direction perpendicular to the rotating shaft 16 of the centrifugal fan impeller 11. ..
  • the distance L2 is defined as the largest distance from the rotating shaft 16 of the centrifugal fan impeller 11 to the inner peripheral surface of the bell mouth 40 in the direction perpendicular to the rotating shaft 16 of the centrifugal fan impeller 11.
  • the distance from the rotating shaft 16 of the centrifugal fan impeller 11 to the inner peripheral surface of the bell mouth 40 is the largest in the direction perpendicular to the rotating shaft 16 of the centrifugal fan impeller 11.
  • the location of the end 42 of the bell mouth 40 is the location of the end 42 of the bell mouth 40.
  • the smallest distance from the rotation shaft 16 of the impeller 11 for the centrifugal fan to the inner peripheral surface of the bell mouth 40 is defined as the distance L3.
  • the distance from the rotating shaft 16 of the centrifugal fan impeller 11 to the inner peripheral surface of the bell mouth 40 is the smallest in the direction perpendicular to the rotating shaft 16 of the centrifugal fan impeller 11. This is the location of the end 41 of the bell mouth 40.
  • the first distance L1 is smaller than the second distance L2 and larger than the third distance L3. That is, the first distance L1, the second distance L2, and the third distance L3 have the relationship of the following equation (1).
  • the bell mouth 40 may have a portion where the inner diameter does not expand in the direction away from the connected centrifugal fan impeller 11 in the direction of the rotation axis 16 of the centrifugal fan impeller 11. That is, the bell mouth 40 may have a portion whose inner diameter increases as the distance from the connected centrifugal fan impeller 11 toward the rotation axis 16 of the centrifugal fan impeller 11. Further, the largest distance from the rotating shaft 16 of the impeller 11 for the centrifugal fan to the inner peripheral surface of the bell mouth 40 is not limited to the end 42 of the bell mouth 40, but the end 41 and the end. It may be in the middle of the distance from 42.
  • the smallest distance from the rotating shaft 16 of the impeller 11 for the centrifugal fan to the inner peripheral surface of the bell mouth 40 is not limited to the end 41 of the bell mouth 40, and is not limited to the end 41. It may be an intermediate portion between the end portion 42 and the end portion 42.
  • connection point of the bell mouth 40 with the impeller 11 for the centrifugal fan is not limited to the end portion 41, and may be an intermediate portion between the end portion 41 and the end portion 42. Further, the connection point of the impeller 11 for the centrifugal fan with the bell mouth 40 is not limited to the second end plate 15.
  • the bell mouth 40 may be connected to the end of each centrifugal fan blade member 12 of the centrifugal fan impeller 11. Further, in the first embodiment, a part of the bell mouth 40 is arranged outside the casing 20, but the entire bell mouth 40 may be arranged inside the casing 20.
  • the centrifugal fan impeller 11 is a suction type on both sides, the bell mouth 40 is connected to both of the inflow ports 13 formed at both ends of the centrifugal fan impeller 11 in the rotation axis 16 direction. Is preferable.
  • adjacent centrifugal fans 10 have bell mouths 40 connected to each other by a plurality of rod-shaped members 50.
  • one end of each rod-shaped member 50 is connected to the bell mouth 40 of one of the adjacent centrifugal fans 10. Further, the other end of each rod-shaped member 50 is connected to the bell mouth 40 of the other adjacent centrifugal fan 10.
  • the driving force of the motor 30 supplied to one of the adjacent centrifugal fan 10 impellers 11 for the centrifugal fan is a plurality. It is transmitted to the impeller 11 for the other centrifugal fan of the adjacent centrifugal fans 10 via the rod-shaped member 50 and the bell mouth 40.
  • both the centrifugal fan impellers 11 of the adjacent centrifugal fans 10 rotate around the same rotating shaft 16.
  • the impellers 11 for both centrifugal fans of the adjacent centrifugal fans 10 are arranged along a common rotation axis direction.
  • the adjacent centrifugal fans 10 are arranged along the rotation axis direction of the centrifugal fan impeller 11.
  • the impeller for the centrifugal fan of each centrifugal fan is attached to one drive shaft. To do.
  • the drive shaft is long, a mechanism for rotatably supporting an intermediate portion of the drive shaft is required.
  • the blower 1 according to the first embodiment can eliminate the need for a mechanism that rotatably supports an intermediate portion of the drive shaft 31.
  • the rod-shaped member 50 and the bell mouth 40 are connected to each other outside the casing 20. Further, in the first embodiment, the distance from the rotating shaft 16 of the centrifugal fan impeller 11 to the connection point between the rod-shaped member 50 and the bell mouth 40 in the direction perpendicular to the rotating shaft 16 of the centrifugal fan impeller 11. Is larger than the distance from the rotating shaft 16 of the impeller 11 for the centrifugal fan to the edge 22 of the suction port 21 of the casing 20.
  • any one of the plurality of centrifugal fans 10 becomes the first centrifugal fan.
  • one of the two centrifugal fans 10 is the first centrifugal fan.
  • the centrifugal fan impeller 11 of the first centrifugal fan becomes the impeller for the first centrifugal fan.
  • the centrifugal fan blade member 12 of the impeller for the first centrifugal fan serves as the blade member for the first centrifugal fan.
  • the inflow port 13 of the impeller for the first centrifugal fan serves as the first inflow port.
  • the bell mouth 40 connected to the impeller for the first centrifugal fan becomes the first bell mouth.
  • the centrifugal fan 10 in which the impeller 11 for the centrifugal fan is connected to the first bell mouth serves as an external fan. More specifically, among the centrifugal fans 10 other than the first centrifugal fan, the centrifugal fan 10 in which the impeller 11 for the centrifugal fan is connected to the first bell mouth is the second centrifugal fan which is an example of the external fan. That is, the external fan is provided outside the first centrifugal fan. Further, the impeller of the external fan becomes an external impeller. That is, the external impeller is provided outside the casing 20 of the first centrifugal fan.
  • the impeller 11 for the centrifugal fan of the centrifugal fan 10 serving as the external fan becomes the external impeller. More specifically, the centrifugal fan impeller 11 of the centrifugal fan 10 serving as an external fan is the second centrifugal fan impeller, which is an example of the external impeller.
  • the centrifugal fan blade member 12 of the impeller for the second centrifugal fan serves as the blade member for the second centrifugal fan.
  • the inflow port 13 of the impeller for the second centrifugal fan serves as the second inflow port.
  • the bell mouth 40 connected to the impeller for the second centrifugal fan becomes the second bell mouth.
  • the impeller for the second centrifugal fan is connected to the first bell mouth via the second bell mouth and the plurality of rod-shaped members 50.
  • the connection points between the plurality of rod-shaped members 50 and the first bell mouth are the connection points between the first bell mouth and the external impeller.
  • FIG. 3 is a cross-sectional view of the blower according to the comparative example.
  • the broken line shown in FIG. 3 shows the air flow in the blower 200 according to the comparative example.
  • the difference between the blower 200 according to the comparative example and the blower 1 according to the first embodiment is the presence or absence of the bell mouth 40.
  • the blower 200 according to the comparative example does not include the bell mouth 40, like a conventional blower having a centrifugal fan and an external fan provided outside the centrifugal fan. Therefore, in the blower 200 according to the comparative example, the second end plates 15 of the centrifugal fan impeller 11 of the adjacent centrifugal fan 201 are connected to each other by a rod-shaped member 50.
  • each centrifugal fan 201 of the blower 200 air flows from the suction port 21 of the casing 20 toward the inflow port 13 of the impeller 11 for the centrifugal fan without any guidance, and the blades for the centrifugal fan flow. It is configured to flow into the car 11.
  • each centrifugal fan 201 of the blower 200 according to the comparative example the flow of air flowing into the centrifugal fan impeller 11 is disturbed. Further, in each centrifugal fan 201 of the blower 200 according to the comparative example, a leak flow is generated in which the air blown from the centrifugal fan impeller 11 leaks from the suction port 21 of the casing 20, and the static pressure increase amount. It causes a decline. Therefore, the blower performance of the blower 200 according to the comparative example deteriorates.
  • the centrifugal fan 10 of the blower 1 according to the first embodiment As shown by the broken line in FIG. 1, the air flowing from the suction port 21 of the casing 20 toward the inflow port 13 of the impeller 11 for the centrifugal fan , Is rectified by the bell mouth 40. Therefore, in the centrifugal fan 10 of the blower 1 according to the first embodiment, it is possible to suppress the disturbance of the air flow flowing into the centrifugal fan impeller 11 as compared with the conventional case.
  • the centrifugal fan 10 of the blower 1 according to the first embodiment it is possible to suppress the occurrence of a leak flow, which is a flow in which the air blown from the centrifugal fan impeller 11 leaks from the suction port 21 of the casing 20. Therefore, the blower 1 according to the first embodiment can improve the blowing performance as compared with the conventional one.
  • the blower 1 includes a centrifugal fan 10 as a first centrifugal fan and a centrifugal fan 10 as an external fan provided outside the first centrifugal fan.
  • the first centrifugal fan includes an impeller for the first centrifugal fan and a casing 20.
  • the impeller for the first centrifugal fan is an impeller in which a plurality of blade members for the first centrifugal fan are arranged in a ring shape at predetermined intervals, and the end side of the impeller in the rotation axis direction is air. It is the first inflow inlet.
  • the casing 20 covers the impeller for the first centrifugal fan, and a suction port 21 is formed at a position facing the first inflow port.
  • the external fan includes an external impeller provided outside the casing 20 of the first centrifugal fan.
  • the blower 1 according to the first embodiment includes a motor 30 and a first bell mouth.
  • the motor 30 supplies a driving force for rotating the impeller for the first centrifugal fan and the external impeller.
  • the first bell mouth is connected to the end of the impeller for the first centrifugal fan on the side where the first inflow port is formed, and the blade for the first centrifugal fan is connected in the rotation axis direction of the impeller for the first centrifugal fan. It has a place where the inner diameter increases as the distance from the car increases.
  • the external impeller is connected to the first bell mouth.
  • the centrifugal fan 10 of the blower 1 according to the first embodiment it is possible to suppress the disturbance of the air flow flowing into the centrifugal fan impeller 11 as compared with the conventional case, and the centrifugal fan impeller 11 It is possible to suppress the occurrence of a leak flow, which is a flow in which the blown air leaks from the suction port 21 of the casing 20. Therefore, the blower 1 according to the first embodiment can improve the blowing performance as compared with the conventional one.
  • the centrifugal fan 10 of the blower 1 according to the first embodiment a part of the bell mouth 40 is arranged outside the casing 20 through the suction port 21. Therefore, in the centrifugal fan 10 of the blower 1 according to the first embodiment, the flow of the centrifugal fan impeller 11 from the suction port 21 of the casing 20 is compared with the case where the entire bell mouth 40 is arranged inside the casing 20. The air flowing toward the inlet 13 can be more rectified. Therefore, the blower 1 according to the first embodiment can further improve the blowing performance.
  • the bell mouth 40 is the casing 20.
  • the portion arranged outside the above has a portion in which the second distance is larger than the first distance.
  • the rod-shaped member 50 and the bell mouth 40 are connected to each other outside the casing 20. That is, in the centrifugal fan 10 of the blower 1 according to the first embodiment, the connection point between the first bell mouth and the external impeller is outside the casing 20. As a result, the air flowing from the suction port 21 of the casing 20 toward the inflow port 13 of the impeller 11 for the centrifugal fan is not blocked by the connection point between the first bell mouth and the external impeller. Therefore, the blower 1 according to the first embodiment can further improve the blowing performance.
  • Embodiment 2 By configuring the plurality of rod-shaped members 50 as follows, it is possible to further improve the blowing performance of the blower 1.
  • items not particularly described will be the same as those in the first embodiment, and the same functions and configurations as those in the first embodiment will be described using the same reference numerals.
  • FIG. 4 is a perspective view of the blower according to the second embodiment. Further, FIG. 5 is a cross-sectional view of the blower according to the second embodiment.
  • Each of the rod-shaped members 50 according to the second embodiment has a wing shape. These rod-shaped members 50 are arranged in an annular shape centered on the rotation shaft 16 at a predetermined interval. As a result, these rod-shaped members 50 become the impeller 61 for the cross flow fan that constitutes the cross flow fan 60.
  • the rod-shaped member 50 having a blade shape and forming the impeller 61 for the cross flow fan may be referred to as a blade member 62 for the cross flow fan.
  • the cross flow fan 60 is provided outside the centrifugal fan 10.
  • the impeller 61 for the cross flow fan is provided outside the casing 20 of the centrifugal fan 10.
  • the cross-flow fan impeller 61 rotates together with the centrifugal fan impeller 11 by the driving force of the motor 30.
  • one end of each cross-flow fan blade member 62 constituting the cross-flow fan impeller 61 is connected to the bell mouth 40. Therefore, the cross flow fan 60 becomes an external fan with respect to the centrifugal fan 10 which becomes the first centrifugal fan.
  • the impeller 61 for the cross flow fan is an external impeller.
  • the connection point between the bell mouth 40, which is the first bell mouth, and the wing member 62 for the cross flow fan is the connection point between the first bell mouth and the external impeller.
  • the blower 1 includes a first air passage member 63 and a second air passage member 65 that surround a part of the air flow path blown from the impeller 61 for the cross flow fan. ..
  • the first air passage member 63, the second air passage member 65, and the casing 20 surround the flow path of the air blown from the impeller 61 for the cross flow fan.
  • the first air passage member 63 includes a tongue portion 64.
  • the tongue portion 64 faces the impeller 61 for the cross flow fan, and extends in the direction of the rotation shaft 16 which is the rotation axis of the impeller 61 for the cross flow fan.
  • the second air passage member 65 includes a stabilizer 66.
  • the stabilizer 66 is provided on the opposite side of the tongue portion 64 with respect to the rotation shaft 16. Further, the stabilizer 66 faces the impeller 61 for the cross flow fan and extends in the direction of the rotation shaft 16.
  • the blower 1 according to the second embodiment has an increased air volume for 60 minutes of the cross flow fan as compared with the blower 1 shown in the first embodiment. Therefore, the blower 1 according to the second embodiment can further improve the blowing performance as compared with the blower 1 shown in the first embodiment.
  • the outer diameter of the impeller 61 for the cross flow fan and the outer diameter of the impeller 11 for the centrifugal fan can be made different depending on the connection location between the bell mouth 40 and the wing member 62 for the cross flow fan. Also in the blower 1 according to the second embodiment, the outer diameter of the impeller 61 for the cross flow fan and the outer diameter of the impeller 11 for the centrifugal fan are different. The outer diameter of the impeller 61 for the cross flow fan may be determined according to the air volume required for the cross flow fan 60.
  • the air volume of the cross flow fan 60 can be made larger than the air volume of one centrifugal fan 10. ..
  • Embodiment 3 As described above, the cross-flow fan 60 serves as an external fan with respect to the centrifugal fan 10 which serves as the first centrifugal fan. Therefore, the blower 1 can be configured as follows.
  • items not particularly described are the same as those of the first embodiment or the second embodiment, and the same reference numerals are used for the same functions and configurations as those of the first embodiment or the second embodiment. Will be described.
  • FIG. 6 is a perspective view of the blower according to the third embodiment.
  • the blower 1 shown in the second embodiment includes two centrifugal fans 10.
  • the blower 1 according to the third embodiment has a configuration in which the centrifugal fan 10 shown on the left side of the paper in FIGS. 4 and 5 is not provided among the centrifugal fans 10 shown in the second embodiment. There is.
  • the blower 1 can also be composed of one centrifugal fan 10 and one cross flow fan 60.
  • the blower is provided by changing the ratio between the length of the centrifugal fan 10 in the rotating shaft 16 direction and the length of the cross flow fan 60 in the rotating shaft 16 direction.
  • the air volume of the entire blower 1 can be adjusted without changing the length of the rotating shaft 1 in the 16 direction.
  • Embodiment 4 In the first embodiment and the third embodiment, two fans are arranged in the rotation axis 16 direction. In the second embodiment, three fans are arranged in the rotation axis 16 direction. However, the number of fans arranged in the rotation axis 16 direction in the blower 1 is not limited to these numbers. If the blower 1 includes a centrifugal fan 10 as a first centrifugal fan and a fan as an external fan, the number of fans arranged in the rotation axis 16 direction is arbitrary. In the fourth embodiment, some examples of the blower 1 in which four or more fans are arranged in the 16 directions of the rotating shaft will be introduced. In the fourth embodiment, items not particularly described are the same as those of the first to third embodiments, and the same functions and configurations as those of the first to third embodiments are the same. It will be described using the code of.
  • FIG. 7 is a perspective view showing an example of the blower according to the fourth embodiment.
  • the blower 1 shown in FIG. 7 has a configuration in which a plurality of cross flow fans 60 are arranged between two centrifugal fans 10 and four or more fans are arranged in the rotation axis 16 direction.
  • the centrifugal fan impeller 11 of the centrifugal fan 10 and the cross flow fan impeller 61 of the cross flow fan 60 are connected in the same configuration as in the second embodiment.
  • the cross flow fan impellers 61 of the adjacent cross flow fans 60 are connected to each other by an annular end plate 67 provided between the two.
  • FIG. 8 is a perspective view showing another example of the blower according to the fourth embodiment.
  • the blower 1 shown in FIG. 8 has a configuration in which centrifugal fans 10 and cross flow fans 60 are alternately arranged in the rotation shaft 16 direction, and four or more fans are arranged in the rotation shaft 16 direction.
  • the centrifugal fan impeller 11 of the centrifugal fan 10 and the cross flow fan impeller 61 of the cross flow fan 60 are connected in the same configuration as in the second embodiment.
  • the length of the blower 1 can be increased and the air volume of the blower 1 can be increased. Further, the larger the proportion of the cross flow fan 60 in the direction of the rotating shaft 16, the larger the air volume of the blower 1.
  • Embodiment 5 an example of the air conditioner including the blower 1 shown in any one of the first to fourth embodiments will be described. More specifically, in the fifth embodiment, an example in which the blower 1 shown in any one of the first to fourth embodiments is provided in the indoor unit of the air conditioner will be described. Of course, the blower 1 shown in any one of the first to fourth embodiments may be provided in the outdoor unit of the air conditioner. Further, in the fifth embodiment, items not particularly described are the same as any of the first to fourth embodiments, and the same functions and configurations as any of the first to fourth embodiments are the same. It will be described using the code of.
  • FIG. 9 is a cross-sectional view of the indoor unit of the air conditioner according to the fifth embodiment.
  • the indoor unit 100 includes the blower 1 shown in any one of the first to fourth embodiments and the heat exchanger 105.
  • the heat exchanger 105 exchanges heat between the refrigerant flowing inside the heat exchanger 105 and the air supplied from the blower 1.
  • the blower 1 and the heat exchanger 105 are housed in the housing 101.
  • the housing 101 is formed with a suction port 102 and an outlet 103. Further, in the housing 101, an air passage 104 that communicates the suction port 102 and the air outlet 103 is formed. A blower 1 is provided in the air passage 104. Further, in the fifth embodiment, at least a part of the casing 20 of the blower 1 is an integrally formed product with the housing 101.
  • the heat exchanger 105 is also provided in the air passage 104 in the housing 101, like the blower 1. More specifically, the heat exchanger 105 is provided at a position in the air passage 104 between the suction port 102 and the blower 1. That is, when the blower 1 operates, the air outside the housing 101 is sucked into the air passage 104 from the suction port 102, and this air is supplied to the heat exchanger 105. Then, the air that has passed through the heat exchanger 105 is blown out of the housing 101 from the air outlet 103. When the heat exchanger 105 functions as an evaporator, dew condensation may occur on the heat exchanger 105.
  • the housing 101 according to the fifth embodiment is provided with a drain pan 107 at a position below the end of the heat exchanger 105 to receive the water flowing down from the heat exchanger 105.
  • the indoor unit 100 according to the fifth embodiment is a filter 106 that removes dust from the air sucked into the air passage 104 at a position between the suction port 102 and the heat exchanger 105 in the air passage 104. It has.
  • the blower 1 can improve the blowing performance as compared with the conventional one. Therefore, the indoor unit 100 can suppress the deterioration of the air blowing performance from the air outlet 103 even when there is a place where the pressure loss becomes large in the air passage 104, and can stably blow air from the air outlet 103.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
PCT/JP2019/047124 2019-12-03 2019-12-03 送風機及び空気調和装置 Ceased WO2021111509A1 (ja)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52102909A (en) * 1976-02-24 1977-08-29 Nissan Motor Co Ltd Exhaust gas cleaning system for engine
JP2002048085A (ja) * 2000-07-28 2002-02-15 Mitsubishi Electric Corp 多連型多翼送風機用羽根車、多連型多翼送風機および空気調和機

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52102909U (https=) * 1976-02-02 1977-08-04

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52102909A (en) * 1976-02-24 1977-08-29 Nissan Motor Co Ltd Exhaust gas cleaning system for engine
JP2002048085A (ja) * 2000-07-28 2002-02-15 Mitsubishi Electric Corp 多連型多翼送風機用羽根車、多連型多翼送風機および空気調和機

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