WO2009136585A1 - Cross‑flow fan and air conditioner equipped with same - Google Patents

Cross‑flow fan and air conditioner equipped with same Download PDF

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Publication number
WO2009136585A1
WO2009136585A1 PCT/JP2009/058448 JP2009058448W WO2009136585A1 WO 2009136585 A1 WO2009136585 A1 WO 2009136585A1 JP 2009058448 W JP2009058448 W JP 2009058448W WO 2009136585 A1 WO2009136585 A1 WO 2009136585A1
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WO
WIPO (PCT)
Prior art keywords
blade
impeller
notch
flow fan
cross flow
Prior art date
Application number
PCT/JP2009/058448
Other languages
French (fr)
Japanese (ja)
Inventor
弘宣 寺岡
志明 鄭
Original Assignee
ダイキン工業株式会社
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 ダイキン工業株式会社 filed Critical ダイキン工業株式会社
Priority to KR1020107023472A priority Critical patent/KR101233538B1/en
Priority to CN2009801127280A priority patent/CN101999044B/en
Priority to US12/937,833 priority patent/US20110033306A1/en
Priority to EP09742709.0A priority patent/EP2280176B1/en
Priority to ES09742709T priority patent/ES2784543T3/en
Priority to AU2009245176A priority patent/AU2009245176B2/en
Publication of WO2009136585A1 publication Critical patent/WO2009136585A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/007—Ventilation with forced flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • 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
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/06—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
    • F04D29/26—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
    • 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
    • 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
    • F24F1/0043—Indoor units, e.g. fan coil units characterised by mounting arrangements
    • F24F1/0057—Indoor units, e.g. fan coil units characterised by mounting arrangements mounted in or on a wall
    • 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
    • F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
    • F24F1/0063—Indoor units, e.g. fan coil units characterised by heat exchangers by the mounting or arrangement of the heat exchangers

Definitions

  • the present invention relates to a cross flow fan and an air conditioner equipped with the same.
  • a crossflow fan is known as a blower used for an indoor unit of a wall-mounted air conditioner.
  • FIG. 14 shows an example of a cross flow fan.
  • the cross flow fan 104 is a cross-flow fan (cross-flow fan), and includes an impeller 141 constituted by a large number of blades (blades) 142. These blades 142 are so-called forward blades that are inclined so that the outer edges thereof are located on the front side in the rotational direction Z1 of the impeller 141 with respect to the inner edges.
  • the air flow X (that is, the conditioned air flow) cooled or heated in the indoor unit 1 in the air conditioner is perpendicular to the rotation axis Z of the impeller 141. It passes through the impeller 141 so as to cross in a plane and is blown into the room.
  • FIGS. 15A and 15B are perspective views showing blades of an impeller in such a cross flow fan. As shown in FIGS. 15A and 15B, a plurality of notches 242 b are formed at predetermined intervals on the outer peripheral edge 242 a of the plate-like wing 242. A smooth portion 242c is formed between adjacent notches 242b. As shown in FIG.
  • the bottom portion 242 y of the notch 242 b configured as described above extends in a direction substantially perpendicular to both side surfaces of the wing 242.
  • the formation of the plurality of notches 242b in the blade 242 reduces the wake vortex (not shown) generated in the blowing region M of the cross flow fan 204, that is, the blade 242 has a simple shape. By making the change, the noise of the cross flow fan 204 can be effectively reduced.
  • the air resistance against the rotation of the impeller 241 increases due to the collision of the airflow X in the suction region N of the crossflow fan 204.
  • the output of the electric motor that drives the cross flow fan 204 must be increased.
  • the present invention has been made in view of such circumstances, and an object of the present invention is to provide a cross flow fan that can suppress an increase in the output of an electric motor that drives the cross flow fan, and an air conditioner including the cross flow fan. There is to do.
  • An impeller constituted by a plurality of plate-like blades, and the blade is inclined such that an outer edge of the blade is located in front of an inner edge in a rotation direction of the impeller, and both side surfaces of the blade
  • a plurality of notches are formed at predetermined intervals along the rotation axis of the impeller, and connect the bottom of each notch and the pressure surface, and connect the bottom of each notch and the suction surface.
  • a black circle with at least one of the negative pressure corners rounded Flow fan is provided.
  • the “predetermined interval” may be a constant interval or may be an interval in which the interval is changed depending on the position of the blade in the longitudinal direction.
  • the present invention it is possible to adopt a configuration in which the negative pressure corner portion connecting the bottom portion of the notch and the negative pressure surface is rounded. Moreover, in this invention, the structure by which the said pressure corner
  • a plurality of support plates positioned on the rotation axis of the impeller, and a plurality of plate-like wings provided on the peripheral edge of the support plate and extending in parallel with the rotation axis.
  • the blade is inclined such that the outer edge of the blade is located on the front side of the rotation direction of the impeller with respect to the inner edge, and the rotation direction of the impeller among the both side surfaces of the blade
  • a plurality of notches are formed on the outer edge of the blade.
  • a cross flow fan which is formed at predetermined intervals along a rotation axis, and a bottom portion of the notch is formed in a curved surface which protrudes generally toward the outer periphery of the impeller.
  • the “predetermined interval” may be a constant interval or may be an interval in which the interval is changed depending on the position of the blade in the longitudinal direction.
  • the notch has a V shape when viewed from the suction surface and the pressure surface of the blade. According to this configuration, it is possible to ensure the pressure area of the blade as compared with the case where the notch is formed in a rectangular shape.
  • an air conditioner provided with the crossflow fan which has the above-mentioned structure is provided.
  • the present invention by forming a notch in the outer edge of the wing, noise can be effectively reduced with a simple configuration. Furthermore, at least one of the pressure angle portion and the negative pressure angle portion connecting the bottom portion of the notch to the pressure surface and the negative pressure surface is rounded. Therefore, the air flow flowing into the notch from the outer peripheral side of the blade can smoothly flow into the impeller along the suction surface and the pressure surface. Therefore, it is possible to reduce the collision loss when the air flow flows into the notch from the outer peripheral side of the blade, and as a result, the output of the electric motor that drives the cross flow fan due to the formation of the notch in the blade. Can be suppressed.
  • FIG. 5 is a cross-sectional view of the wing taken along line 5-5 in FIG. 4; The perspective view which shows the cross section of a notch. The figure for demonstrating the aspect of the airflow which flows in into a notch. Sectional drawing of the modification of a wing
  • Sectional view of yet another variation of the wing (A) (b) The perspective view which shows the other modification of a wing
  • the air conditioner according to the present embodiment includes a wall-mounted indoor unit 1, and the indoor unit 1 includes a main body casing 2 and a heat exchanger disposed in the main body casing 2. 3 and a cross flow fan 4 are provided.
  • the cross flow fan 4 includes an impeller 41 having plate-like blades (blades) 42, and the impeller 41 is driven by an electric motor (not shown), so that air is sucked from its suction region N. Pump to the blowing area M.
  • the air inlet 21 is provided on the upper surface and the front surface (left surface in the drawing) of the main casing 2, and the air outlet 22 is provided on the lower surface of the main casing 2.
  • the air outlet 22 is provided with a vertical blade 23 and a horizontal blade 24 for adjusting the direction of air blown from the air outlet 22.
  • a guide portion 25 is formed in the vicinity of the blowout region M of the cross flow fan 4 inside the main body casing 2, and this guide portion 25 forms a flow path of air blown out by the cross flow fan 4. Yes.
  • the air outlet 22 is formed with a backflow preventing tongue 26.
  • the backflow preventing tongue 26 separates the blowing area M and the suction area N to prevent the backflow of the air blown out. .
  • the heat exchanger 3 is located between the air inlet 21 and the impeller 41, and includes a front heat exchange unit 3a and a back heat exchange unit 3b.
  • the front heat exchange unit 3a is disposed in the vicinity of the front surface in the main body casing 2, and the rear heat exchange unit 3b is connected to the upper end of the front heat exchange unit 3a. It is arranged in the vicinity.
  • the impeller 41 of the crossflow fan 4 supports a number of plate-like blades 42 and a plurality of circular supports that support the blades 42 and are located on the rotation axis A ⁇ b> 1 of the impeller 41.
  • These support plates 43 are arranged in parallel at predetermined intervals along the rotation axis A1 of the impeller 41, that is, the longitudinal direction of the blades.
  • the blade 42 is fixed to the outer peripheral edge 43a of the support plate 43, and is disposed between two adjacent support plates 43 so as to extend in parallel with the rotation axis A1.
  • the blade 42 is inclined at a predetermined blade angle so that the outer edge 42a of the blade 42 is located on the front side in the rotation direction Z1 of the impeller 41 with respect to the inner edge 42d. It is a wing. As shown in FIGS. 2 and 3, the side surface located on the front side in the rotation direction Z1 among the both side surfaces of the blade 42 constitutes the pressure surface 42p, and the side surface located on the rear side in the rotation direction Z1 is the suction surface. 42q. Further, the blade 42 is curved so that the outer edge 42a of the blade 42 is positioned on the front side in the rotational direction Z1 of the impeller 41 with respect to the inner edge 42d.
  • a plurality of notches 42 b are formed at predetermined intervals along the rotation axis A ⁇ b> 1 of the impeller 41 on the outer edge 42 a of the blade 42. These notches 42b are formed in a V shape when viewed from the suction surface 42q and the pressure surface 42p of the blade 42.
  • a basic shape portion 42c having a curved basic shape of the wing 42 is formed between two adjacent notches 42b. The interval between two adjacent notches 42b may be set to a constant value or may be set to a different value. For example, as shown in FIGS.
  • the end 6a of the blade 42 in the rotation axis A1 is in the vicinity of the support plate 43, the end 6a is more than the center 6b of the blade 42 in the rotation axis A1.
  • the flow velocity of the air flow X flowing through the In the present embodiment the interval between the notches 42 b in the end portion 6 a of the blade 42 is set to be larger than the interval between the notches 42 b in the central portion 6 b of the blade 42. Thereby, the pressure area of the edge part 6a of the wing
  • the notches 42b may all be formed in the same size, but may be formed in different sizes depending on the position on the rotation axis A1.
  • the notch 42b of the end portion 6a of the blade 42 in the rotation axis A1 is formed to be smaller than the notch 42b of the central portion 6b of the blade 42 in the rotation axis A1. Thereby, the pressure area of the edge part 6a of the wing
  • notches 42b are formed at predetermined intervals on the outer edge 42a of the blade 42, and a plurality of basic shape portions 42c are formed between the notches 42b. For this reason, the wake vortex (not shown) generated in the blowing region M of the cross flow fan 4 can be reduced, and noise can be effectively reduced with a simple configuration.
  • the notch 42b is formed in a V shape when viewed from the negative pressure surface 42q and the pressure surface 42p of the blade 42, the pressure area of the blade 42 can be secured as compared with the case where the notch 42b is formed in a rectangular shape. it can.
  • FIG. 5 is a cross-sectional view of the wing 42 taken along line 5-5 of FIG. 4, and FIG. 6 is a perspective view showing a cross-section of the notch 42b.
  • the negative pressure angle portion 42m that connects the bottom portion 42y of the notch 42b and the negative pressure surface 42q
  • the pressure angle that connects the bottom portion 42y of the notch 42b and the pressure surface 42p. Both portions 42n are rounded.
  • the bottom 42y extending in the direction substantially perpendicular to the suction surface 42q of the blade 42 at the notch 42b and the suction surface 42q are smoothly connected by the negative pressure angle portion 42m.
  • a bottom 42y extending in a direction substantially perpendicular to the pressure surface 42p of the blade 42 in the notch 42b and the pressure surface 42p are smoothly connected by a pressure angle portion 42n.
  • the length of the bottom portion 42y extending in a direction substantially perpendicular to the pressure surface 42p and the negative pressure surface 42q is shorter than the length of the bottom portion 242y of the conventional notch 242b (see FIG. 16).
  • the negative pressure corner portion 42m and the pressure corner portion 42n are rounded to form a smooth curved surface, as shown in FIG. 7, the negative pressure corner portion 42m and the pressure corner portion 42n flow into the notch 42b from the outer peripheral side of the blade 42.
  • the air flow X can smoothly flow into the impeller 41 along the negative pressure surface 42q and the pressure surface 42p. As a result, it is possible to reduce the collision loss when the airflow X flows from the outer peripheral side of the blade 42 into the notch 42b.
  • the following effects can be obtained. (1) Since the pressure angle portion 42n and the negative pressure angle portion 42m that connect the bottom portion 42y of the notch 42b, the pressure surface 42p, and the negative pressure surface 42q, respectively, are rounded to form a smooth curved surface. The air flow X flowing from the outer peripheral side of the blade 42 into the notch 42b can smoothly flow into the impeller 41 along the negative pressure surface 42q and the pressure surface 42p. Accordingly, it is possible to reduce the collision loss when the airflow X flows from the outer peripheral side of the blade 42 into the notch 42b.
  • the air conditioner since the notch 42b is formed in a V shape when viewed from the suction surface 42q and the pressure surface 42p of the blade 42, the pressure area of the blade 42 can be secured.
  • the air conditioner since the air conditioner includes the cross flow fan 4 that can obtain the effects (1) and (2), the same effects as the above (1) and (2) can be obtained. it can.
  • both the negative pressure angle portion 42m and the pressure angle portion 42n are rounded.
  • the present invention is not limited to this, and only one of the negative pressure corner portion 42m and the pressure corner portion 42n may be rounded.
  • FIG. 8 shows a configuration in which only the negative pressure angle portion 42m is rounded.
  • FIG. 9 shows a configuration in which only the pressure corner portion 42n is rounded. Even if it does in this way, it can suppress the increase in the output of the electric motor which drives the crossflow fan 4 resulting from notch being formed in the blade
  • the bottom 42y of the notch 42b may be formed in a smooth curved surface that protrudes generally toward the outer periphery. According to such a configuration, the airflow X flowing into the notch 42b from the outer peripheral side of the blade 42 can flow more smoothly into the impeller 41 along the negative pressure surface 42q or the pressure surface 42p. Therefore, it is possible to further reduce the collision loss when the airflow X flows into the notch 42b from the outer peripheral side of the blade 42, and more efficiently suppress the increase in the output of the electric motor that drives the crossflow fan 4. be able to.
  • the notch 42b is formed in a V shape when viewed from the suction surface 42q and the pressure surface 42p of the blade 42, but may not be configured in this manner.
  • the notch 42b may be formed to have a rectangular shape when viewed from the suction surface 42q and the pressure surface 42p of the blade 42.
  • a sectional view taken along line 5-5 of FIG. 12 is the same as FIG.
  • the notch 42b is formed in a rectangular shape in this way, the bottom 42y of the notch 42b may be formed in a curved surface that protrudes entirely toward the outer periphery of the impeller 41.

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

Abstract

A cross‑flow fan is equipped with a blade wheel comprising plate blades (42). The blades (42) are inclined so that the outer edge (42a) of a blade (42) is located forward of the inner edge (42d) thereof in the rotational direction of the blade wheel (41). Of the two side faces of a blade (42), the side face located on the forward side in the rotational direction of the blade (42) constitutes a pressure face (42p), and the side face located rearward in the same rotational direction constitutes a negative pressure face (42q). A plurality of cutaways (42b) is formed at a specified spacing along the rotational axis of the blade wheel on the outer edge (42a) of the blade (42). A radius is applied to both the pressure corner (42n) that connects the bottom (42y) of the cutaway (42b) and the pressure face (42p), and the negative pressure corner (42m) that connects the bottom (42y) of the cutaway (42b) and the negative pressure face (42q).

Description

クロスフローファン及びこれを備えた空気調和機Cross flow fan and air conditioner equipped with the same
　本発明は、クロスフローファン及びこれを備えた空気調和機に関する。 The present invention relates to a cross flow fan and an air conditioner equipped with the same.
　壁掛け型の空気調和機の室内ユニットに用いられる送風機としては、クロスフローファンが知られている。図１４は、クロスフローファンの一例を示している。図１４に示すように、クロスフローファン１０４は、横流送風機（貫流送風機）であり、多数の翼（羽根）１４２によって構成された羽根車１４１を備えている。これら翼１４２は、その外側縁が内側縁よりも羽根車１４１の回転方向Ｚ１の前側に位置するように傾斜しており、いわゆる前進翼である。羽根車１４１が電動モータにより回転方向Ｚ１へ回転されることにより、空気調和機内の室内ユニット１において冷却あるいは加熱された空気流Ｘ（即ち、調和空気流）が羽根車１４１の回転軸線Ｚに垂直な面において横断するように羽根車１４１を通り抜け、室内へ吹き出される。 A crossflow fan is known as a blower used for an indoor unit of a wall-mounted air conditioner. FIG. 14 shows an example of a cross flow fan. As shown in FIG. 14, the cross flow fan 104 is a cross-flow fan (cross-flow fan), and includes an impeller 141 constituted by a large number of blades (blades) 142. These blades 142 are so-called forward blades that are inclined so that the outer edges thereof are located on the front side in the rotational direction Z1 of the impeller 141 with respect to the inner edges. By rotating the impeller 141 in the rotation direction Z1 by the electric motor, the air flow X (that is, the conditioned air flow) cooled or heated in the indoor unit 1 in the air conditioner is perpendicular to the rotation axis Z of the impeller 141. It passes through the impeller 141 so as to cross in a plane and is blown into the room.
　このようなクロスフローファンの羽根車において、空気が羽根車を形成する翼を通過する際に騒音が生じる。簡単な構成でこの騒音を低減することを目的として、翼の縁部に所定の間隔をもって複数の切欠を設けたクロスフローファンが提案されている（例えば、特許文献１参照）。図１５（ａ），（ｂ）は、このようなクロスフローファンにおける羽根車の翼を示す斜視図である。図１５（ａ），（ｂ）に示すように、板状の翼２４２の外周縁２４２ａには、複数の切欠２４２ｂが所定間隔で形成されている。隣接する切欠２４２ｂの間には、平滑部２４２ｃが形成されている。図１６に示すように、このように構成された切欠２４２ｂの底部２４２ｙは、翼２４２の両側面と略垂直な方向に延びている。以上のように、翼２４２に複数の切欠２４２ｂが形成されることにより、クロスフローファン２０４の吹き出し領域Ｍにおいて発生する後流渦（不図示）が低減され、即ち、翼２４２について簡単な形状の変更を行うことによってクロスフローファン２０４の騒音を効果的に低減することができる。
特開２００６－１２５３９０号公報 In such a crossflow fan impeller, noise is generated when air passes through the blades forming the impeller. In order to reduce this noise with a simple configuration, a cross flow fan has been proposed in which a plurality of notches are provided at predetermined intervals on the blade edge (see, for example, Patent Document 1). FIGS. 15A and 15B are perspective views showing blades of an impeller in such a cross flow fan. As shown in FIGS. 15A and 15B, a plurality of notches 242 b are formed at predetermined intervals on the outer peripheral edge 242 a of the plate-like wing 242. A smooth portion 242c is formed between adjacent notches 242b. As shown in FIG. 16, the bottom portion 242 y of the notch 242 b configured as described above extends in a direction substantially perpendicular to both side surfaces of the wing 242. As described above, the formation of the plurality of notches 242b in the blade 242 reduces the wake vortex (not shown) generated in the blowing region M of the cross flow fan 204, that is, the blade 242 has a simple shape. By making the change, the noise of the cross flow fan 204 can be effectively reduced.
JP 2006-125390 A
　上記特許文献１に記載されるように、翼の縁部に切欠を設けるという簡単な構成により騒音を効果的に低減することができる。しかしながら、このような構成を採用する場合には、羽根車２４１の回転に対する空気抵抗が増加するという問題があった。具体的には、図１６に示すように、翼２４２の外周縁２４２ａに切欠２４２ｂが設けられている場合には、羽根車２４１が回転すると、翼２４２の両側面と略垂直な方向に延びる切欠２４２ｂの底部２４２ｙに空気流Ｘが衝突する。このため、外周縁２４２ａに切欠を設けない場合と比較し、クロスフローファン２０４の吸い込み領域Ｎにおいて、空気流Ｘの衝突により羽根車２４１の回転に対する空気抵抗が大きくなる。その結果、クロスフローファン２０４による送風量を確保するために、同クロスフローファン２０４を駆動する電動モータの出力を増大させなければならない。 As described in Patent Document 1, noise can be effectively reduced by a simple configuration in which a notch is provided at the edge of a blade. However, when such a configuration is adopted, there is a problem that air resistance against rotation of the impeller 241 increases. Specifically, as shown in FIG. 16, when a notch 242 b is provided on the outer peripheral edge 242 a of the blade 242, the notch that extends in a direction substantially perpendicular to both side surfaces of the blade 242 when the impeller 241 rotates. The airflow X collides with the bottom 242y of 242b. For this reason, compared with the case where notches are not provided in the outer peripheral edge 242a, the air resistance against the rotation of the impeller 241 increases due to the collision of the airflow X in the suction region N of the crossflow fan 204. As a result, in order to secure the amount of air blown by the cross flow fan 204, the output of the electric motor that drives the cross flow fan 204 must be increased.
　本発明は、こうした実情に鑑みてなされたものであり、その目的は、クロスフローファンを駆動する電動モータの出力の増大を抑制することのできるクロスフローファン及びこれを備えた空気調和機を提供することにある。 The present invention has been made in view of such circumstances, and an object of the present invention is to provide a cross flow fan that can suppress an increase in the output of an electric motor that drives the cross flow fan, and an air conditioner including the cross flow fan. There is to do.
　上記問題点を解決するために、本発明の一態様によれば、羽根車の回転軸線上に位置する複数の支持板と、前記支持板の周縁部に設けられ、前記回転軸線と平行に延びる複数の板状の翼とによって構成された羽根車を備え、前記翼は同翼の外側縁が内側縁よりも前記羽根車の回転方向の前側に位置するように傾斜し、前記翼の両側面のうち前記羽根車の回転方向の前側に位置する側面は圧力面を構成し、前記回転方向の後側に位置する側面は負圧面を構成するクロスフローファンにおいて、前記翼の外側縁には、複数の切欠が前記羽根車の回転軸線に沿って所定間隔で形成され、前記各切欠の底部と前記圧力面とを接続する圧力角部、及び前記各切欠の底部と前記負圧面とを接続する負圧角部の少なくとも一方に丸みが付けられているクロスフローファンが提供される。 In order to solve the above problems, according to one aspect of the present invention, a plurality of support plates positioned on a rotation axis of an impeller, and provided at a peripheral edge of the support plate, extend in parallel with the rotation axis. An impeller constituted by a plurality of plate-like blades, and the blade is inclined such that an outer edge of the blade is located in front of an inner edge in a rotation direction of the impeller, and both side surfaces of the blade In the cross flow fan in which the side surface located on the front side in the rotational direction of the impeller constitutes a pressure surface, and the side surface located on the rear side in the rotational direction constitutes a negative pressure surface, on the outer edge of the blade, A plurality of notches are formed at predetermined intervals along the rotation axis of the impeller, and connect the bottom of each notch and the pressure surface, and connect the bottom of each notch and the suction surface. A black circle with at least one of the negative pressure corners rounded Flow fan is provided.
　同構成によれば、翼の外側縁に切欠が形成されることにより、簡単な構成で騒音を効果的に低減することができる。さらに、切欠の底部と圧力面及び負圧面とをそれぞれ接続する圧力角部及び負圧角部の少なくとも一方に丸みが付けられている。そのため、翼の外周側から切欠へ流入する空気流が負圧面及び圧力面に沿って羽根車内へスムーズに流入することができる。従って、翼の外周側から空気流が切欠へ流入する際の衝突損失を低減することができ、その結果、翼に切欠が形成されることに起因してクロスフローファンを駆動する電動モータの出力の増大を抑制することができる。上記において、「所定間隔」とは、一定の間隔でもよいし、あるいは、翼の長手方向の位置により間隔を変えたものでもよい。 According to this configuration, by forming a notch on the outer edge of the wing, noise can be effectively reduced with a simple configuration. Furthermore, at least one of the pressure angle portion and the negative pressure angle portion connecting the bottom portion of the notch to the pressure surface and the negative pressure surface is rounded. Therefore, the air flow flowing into the notch from the outer peripheral side of the blade can smoothly flow into the impeller along the suction surface and the pressure surface. Therefore, it is possible to reduce the collision loss when the air flow flows into the notch from the outer peripheral side of the blade, and as a result, the output of the electric motor that drives the cross flow fan due to the formation of the notch in the blade. Can be suppressed. In the above description, the “predetermined interval” may be a constant interval or may be an interval in which the interval is changed depending on the position of the blade in the longitudinal direction.
　本発明において、前記切欠の底部と前記負圧面とを接続する前記負圧角部には丸みが付けられている構成を採用することができる。
　また、本発明において、前記切欠の底部と前記圧力面とを接続する前記圧力角部には丸みが付けられている構成を採用することができる。 In the present invention, it is possible to adopt a configuration in which the negative pressure corner portion connecting the bottom portion of the notch and the negative pressure surface is rounded.
Moreover, in this invention, the structure by which the said pressure corner | angular part which connects the bottom part of the said notch and the said pressure surface is rounded is employable.
　本発明の他の態様によれば、羽根車の回転軸線上に位置する複数の支持板と、前記支持板の周縁部に設けられ、前記回転軸線と平行に延びる複数の板状の翼とによって構成された羽根車を備え、前記翼は同翼の外側縁が内側縁よりも前記羽根車の回転方向の前側に位置するように傾斜し、前記翼の両側面のうち前記羽根車の回転方向の前側に位置する側面は圧力面を構成し、前記回転方向の後側に位置する側面は負圧面を構成するクロスフローファンにおいて、前記翼の外側縁には、複数の切欠が前記羽根車の回転軸線に沿って所定間隔で形成され、前記切欠の底部は、前記羽根車の外周に向かって全体的に突出する曲面に形成されているクロスフローファンが提供される。 According to another aspect of the present invention, a plurality of support plates positioned on the rotation axis of the impeller, and a plurality of plate-like wings provided on the peripheral edge of the support plate and extending in parallel with the rotation axis. The blade is inclined such that the outer edge of the blade is located on the front side of the rotation direction of the impeller with respect to the inner edge, and the rotation direction of the impeller among the both side surfaces of the blade In the crossflow fan in which the side surface located on the front side of the blade constitutes a pressure surface and the side surface located on the rear side in the rotational direction constitutes the suction surface, a plurality of notches are formed on the outer edge of the blade. There is provided a cross flow fan which is formed at predetermined intervals along a rotation axis, and a bottom portion of the notch is formed in a curved surface which protrudes generally toward the outer periphery of the impeller.
　同構成によれば、翼の外側縁に切欠が形成されることにより、簡単な構成で騒音を効果的に低減することができる。さらに、切欠の底部は羽根車の外周に向かって全体的に突出する滑らかな曲面に形成されているため、翼の外周側から切欠へ流入する空気流が負圧面及び圧力面に沿って羽根車内へスムーズに流入することができる。従って、翼の外周側から空気流が切欠へ流入する際の衝突損失を効果的に低減させることができ、その結果、クロスフローファンを駆動する電動モータの出力の増大を効率的に抑制することができる。上記において、「所定間隔」とは、一定の間隔でもよいし、あるいは、翼の長手方向の位置により間隔を変えたものでもよい。 According to this configuration, noise is effectively reduced with a simple configuration by forming a notch in the outer edge of the wing. Furthermore, since the bottom of the notch is formed into a smooth curved surface that protrudes generally toward the outer periphery of the impeller, the air flow flowing into the notch from the outer peripheral side of the blades flows into the impeller along the suction surface and the pressure surface. Can flow smoothly into. Therefore, it is possible to effectively reduce the collision loss when the airflow flows into the notch from the outer peripheral side of the blade, and as a result, it is possible to efficiently suppress the increase in the output of the electric motor that drives the crossflow fan. Can do. In the above description, the “predetermined interval” may be a constant interval or may be an interval in which the interval is changed depending on the position of the blade in the longitudinal direction.
　本発明において、前記切欠は、前記翼の負圧面及び圧力面から見てＶ字状を成すことが好ましい。
　同構成によれば、切欠が矩形に形成された場合に比し、翼の圧力面積を確保することができる。 In the present invention, it is preferable that the notch has a V shape when viewed from the suction surface and the pressure surface of the blade.
According to this configuration, it is possible to ensure the pressure area of the blade as compared with the case where the notch is formed in a rectangular shape.
　また、本発明によれば、上述の構成を有するクロスフローファンを備える空気調和機が提供される。 Moreover, according to this invention, an air conditioner provided with the crossflow fan which has the above-mentioned structure is provided.
　本発明によれば、翼の外側縁に切欠が形成されることにより、簡単な構成で騒音を効果的に低減することができる。さらに、切欠の底部と圧力面及び負圧面とをそれぞれ接続する圧力角部及び負圧角部の少なくとも一方に丸みが付けられている。そのため、翼の外周側から切欠へ流入する空気流が負圧面及び圧力面に沿って羽根車内へスムーズに流入することができる。従って、翼の外周側から空気流が切欠へ流入する際の衝突損失を低減することができ、その結果、翼に切欠が形成されることに起因してクロスフローファンを駆動する電動モータの出力の増大を抑制することができる。 According to the present invention, by forming a notch in the outer edge of the wing, noise can be effectively reduced with a simple configuration. Furthermore, at least one of the pressure angle portion and the negative pressure angle portion connecting the bottom portion of the notch to the pressure surface and the negative pressure surface is rounded. Therefore, the air flow flowing into the notch from the outer peripheral side of the blade can smoothly flow into the impeller along the suction surface and the pressure surface. Therefore, it is possible to reduce the collision loss when the air flow flows into the notch from the outer peripheral side of the blade, and as a result, the output of the electric motor that drives the cross flow fan due to the formation of the notch in the blade. Can be suppressed.
本発明の一実施形態に係るクロスフローファンを備えた空気調和機の室内ユニットを示す概略構成図。The schematic block diagram which shows the indoor unit of the air conditioner provided with the crossflow fan which concerns on one Embodiment of this invention. 同実施形態に係るクロスフローファンを示す斜視図。The perspective view which shows the crossflow fan which concerns on the same embodiment. （ａ）（ｂ）同ロスフローファンを構成する羽根車の翼を示す斜視図。(A) (b) The perspective view which shows the blade | wing of the impeller which comprises the same loss flow fan. 切欠が設けられた翼を説明するための図。The figure for demonstrating the wing | blade provided with the notch. 図４の５－５線に沿った翼の断面図。FIG. 5 is a cross-sectional view of the wing taken along line 5-5 in FIG. 4; 切欠の断面を示す斜視図。The perspective view which shows the cross section of a notch. 切欠に流入する空気流の態様を説明するための図。The figure for demonstrating the aspect of the airflow which flows in into a notch. 翼の変形例の断面図。Sectional drawing of the modification of a wing | blade. 翼の他の変形例の断面図。Sectional drawing of the other modification of a wing | blade. 翼の更に他の変形例の断面図Sectional view of yet another variation of the wing （ａ）（ｂ）翼の更に他の変形例を示す斜視図。(A) (b) The perspective view which shows the other modification of a wing | blade. 同変形例に係る翼を説明するための図。The figure for demonstrating the wing | blade which concerns on the modification. 同変更例における切欠の断面を示す斜視図。The perspective view which shows the cross section of the notch in the example of a change. 従来のクロスフローファンを説明するための図。The figure for demonstrating the conventional crossflow fan. （ａ）（ｂ）従来のクロスフローファンを構成する羽根車の翼を示す斜視図。(A) (b) The perspective view which shows the blade | wing of the impeller which comprises the conventional crossflow fan. 従来のクロスフローファンを説明するための図。The figure for demonstrating the conventional crossflow fan.
　以下、本発明の一実施形態について、図１～図７を参照しながら説明する。
　図１に示すように、本実施形態に係る空気調和機は、壁掛け型の室内ユニット１を備えており、この室内ユニット１は、本体ケーシング２、本体ケーシング２内に配設された熱交換器３及びクロスフローファン４を備えている。クロスフローファン４は、板状の翼（羽根）４２を有する羽根車４１を備えており、この羽根車４１は、電動モータ（不図示）によって駆動されることにより、空気をその吸い込み領域Ｎから吹き出し領域Ｍへ圧送する。 Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the air conditioner according to the present embodiment includes a wall-mounted indoor unit 1, and the indoor unit 1 includes a main body casing 2 and a heat exchanger disposed in the main body casing 2. 3 and a cross flow fan 4 are provided. The cross flow fan 4 includes an impeller 41 having plate-like blades (blades) 42, and the impeller 41 is driven by an electric motor (not shown), so that air is sucked from its suction region N. Pump to the blowing area M.
　本体ケーシング２の上面及び前面（図中では左面）には、空気吸込口２１が設けられており、本体ケーシング２の下面には、空気吹出口２２が設けられている。空気吹出口２２には、同空気吹出口２２から吹き出される空気の方向を調整するための垂直羽根２３及び水平羽根２４が設けられている。 The air inlet 21 is provided on the upper surface and the front surface (left surface in the drawing) of the main casing 2, and the air outlet 22 is provided on the lower surface of the main casing 2. The air outlet 22 is provided with a vertical blade 23 and a horizontal blade 24 for adjusting the direction of air blown from the air outlet 22.
　本体ケーシング２の内側においてクロスフローファン４の吹き出し領域Ｍの近傍には、ガイド部２５が形成されており、このガイド部２５は、クロスフローファン４により吹き出される空気の流路を形成している。空気吹出口２２には、逆流防止用舌部２６が形成されており、この逆流防止用舌部２６は、吹き出し領域Ｍと吸い込み領域Ｎとを区切ることにより、吹き出される空気の逆流を防止する。 A guide portion 25 is formed in the vicinity of the blowout region M of the cross flow fan 4 inside the main body casing 2, and this guide portion 25 forms a flow path of air blown out by the cross flow fan 4. Yes. The air outlet 22 is formed with a backflow preventing tongue 26. The backflow preventing tongue 26 separates the blowing area M and the suction area N to prevent the backflow of the air blown out. .
　熱交換器３は、空気吸込口２１と羽根車４１との間に位置し、前面熱交換部３ａと背面熱交換部３ｂとから構成されている。前面熱交換部３ａは、本体ケーシング２内においてその前面の近傍に配設されており、背面熱交換部３ｂは、前面熱交換部３ａの上端に連設され、本体ケーシング２内においてその背面の近傍に配設されている。 The heat exchanger 3 is located between the air inlet 21 and the impeller 41, and includes a front heat exchange unit 3a and a back heat exchange unit 3b. The front heat exchange unit 3a is disposed in the vicinity of the front surface in the main body casing 2, and the rear heat exchange unit 3b is connected to the upper end of the front heat exchange unit 3a. It is arranged in the vicinity.
　上述の構成により、クロスフローファン４の羽根車４１が電動モータによって駆動されると、室内の空気が空気吸込口２１から本体ケーシング２の内部に吸い込まれる。そして、この空気は、熱交換器３を通過することによって冷却あるいは加熱された後に、クロスフローファン４を通り抜けて空気吹出口２２から室内へ吹き出される。これにより、調和された空気が室内に送風される。 With the above-described configuration, when the impeller 41 of the cross flow fan 4 is driven by the electric motor, indoor air is sucked into the main body casing 2 from the air suction port 21. The air is cooled or heated by passing through the heat exchanger 3, passes through the cross flow fan 4, and is blown into the room from the air outlet 22. Thereby, the conditioned air is blown into the room.
　図２に示すように、クロスフローファン４の羽根車４１は、多数の板状の翼４２と、これらの翼４２を支持し、羽根車４１の回転軸線Ａ１上に位置する複数の円形の支持板４３と、電動モータに接続され、回転軸線Ａ１に沿って延びる入力軸４４とから構成されている。それらの支持板４３は、羽根車４１の回転軸線Ａ１、即ち翼４２の長手方向に沿って所定の間隔で平行に配設されている。翼４２は、支持板４３の外周縁部４３ａに固定され、回転軸線Ａ１と平行に延びるように隣接する２つの支持板４３の間に配設されている。 As shown in FIG. 2, the impeller 41 of the crossflow fan 4 supports a number of plate-like blades 42 and a plurality of circular supports that support the blades 42 and are located on the rotation axis A <b> 1 of the impeller 41. The plate 43 and an input shaft 44 connected to the electric motor and extending along the rotation axis A1. These support plates 43 are arranged in parallel at predetermined intervals along the rotation axis A1 of the impeller 41, that is, the longitudinal direction of the blades. The blade 42 is fixed to the outer peripheral edge 43a of the support plate 43, and is disposed between two adjacent support plates 43 so as to extend in parallel with the rotation axis A1.
　以下、図３及び図４を併せ参照して翼４２の構造について詳細に説明する。図２に示すように、翼４２は、同翼４２の外側縁４２ａが内側縁４２ｄよりも羽根車４１の回転方向Ｚ１の前側に位置するように所定の翼角をもって傾斜しており、いわゆる前進翼である。図２及び図３に示すように、翼４２の両側面のうち、回転方向Ｚ１の前側に位置する側面は、圧力面４２ｐを構成し、回転方向Ｚ１の後側に位置する側面は、負圧面４２ｑを構成している。更に、翼４２は、同翼４２の外側縁４２ａが内側縁４２ｄよりも羽根車４１の回転方向Ｚ１の前側に位置するように湾曲している。 Hereinafter, the structure of the blade 42 will be described in detail with reference to FIGS. 3 and 4 together. As shown in FIG. 2, the blade 42 is inclined at a predetermined blade angle so that the outer edge 42a of the blade 42 is located on the front side in the rotation direction Z1 of the impeller 41 with respect to the inner edge 42d. It is a wing. As shown in FIGS. 2 and 3, the side surface located on the front side in the rotation direction Z1 among the both side surfaces of the blade 42 constitutes the pressure surface 42p, and the side surface located on the rear side in the rotation direction Z1 is the suction surface. 42q. Further, the blade 42 is curved so that the outer edge 42a of the blade 42 is positioned on the front side in the rotational direction Z1 of the impeller 41 with respect to the inner edge 42d.
　翼４２の外側縁４２ａには、複数の切欠４２ｂが羽根車４１の回転軸線Ａ１に沿って所定間隔で形成されている。これらの切欠４２ｂは、翼４２の負圧面４２ｑ及び圧力面４２ｐから見てＶ字状を成すように形成されている。隣接する２つの切欠４２ｂ間には、翼４２の湾曲した基本形状を有する基本形状部４２ｃが形成されている。隣接する２つの切欠４２ｂの間隔は、一定の値に設定してもよいし、異なる値に設定してもよい。例えば、図３及び図４に示すように、回転軸線Ａ１における翼４２の端部６ａは、支持板４３の近傍であるため、回転軸線Ａ１における翼４２の中央部６ｂよりも、その端部６ａを流れる空気流Ｘの流速が遅い。本実施形態においては、翼４２の端部６ａにおける切欠４２ｂの間隔は、翼４２の中央部６ｂにおける切欠４２ｂの間隔よりも大きく設定されている。これにより、翼４２の端部６ａの圧力面積を確保することができる。 A plurality of notches 42 b are formed at predetermined intervals along the rotation axis A <b> 1 of the impeller 41 on the outer edge 42 a of the blade 42. These notches 42b are formed in a V shape when viewed from the suction surface 42q and the pressure surface 42p of the blade 42. A basic shape portion 42c having a curved basic shape of the wing 42 is formed between two adjacent notches 42b. The interval between two adjacent notches 42b may be set to a constant value or may be set to a different value. For example, as shown in FIGS. 3 and 4, since the end 6a of the blade 42 in the rotation axis A1 is in the vicinity of the support plate 43, the end 6a is more than the center 6b of the blade 42 in the rotation axis A1. The flow velocity of the air flow X flowing through the In the present embodiment, the interval between the notches 42 b in the end portion 6 a of the blade 42 is set to be larger than the interval between the notches 42 b in the central portion 6 b of the blade 42. Thereby, the pressure area of the edge part 6a of the wing | blade 42 is securable.
　切欠４２ｂは、全て同じ大きさに形成されてもよいが、回転軸線Ａ１における位置により異なる大きさに形成されてもよい。本実施形態においては、回転軸線Ａ１における翼４２の端部６ａの切欠４２ｂは、回転軸線Ａ１における翼４２の中央部６ｂの切欠４２ｂよりも小さく形成されている。これにより、翼４２の端部６ａの圧力面積を確保することができる。 The notches 42b may all be formed in the same size, but may be formed in different sizes depending on the position on the rotation axis A1. In the present embodiment, the notch 42b of the end portion 6a of the blade 42 in the rotation axis A1 is formed to be smaller than the notch 42b of the central portion 6b of the blade 42 in the rotation axis A1. Thereby, the pressure area of the edge part 6a of the wing | blade 42 is securable.
　以上のようにして、図４に示すように、翼４２の外側縁４２ａに切欠４２ｂが所定間隔で形成され、切欠４２ｂ間に複数の基本形状部４２ｃが形成されている。このため、クロスフローファン４の吹き出し領域Ｍにおいて発生する後流渦（不図示）を低減することができ、簡単な構成で騒音を効果的に低減することができる。 As described above, as shown in FIG. 4, notches 42b are formed at predetermined intervals on the outer edge 42a of the blade 42, and a plurality of basic shape portions 42c are formed between the notches 42b. For this reason, the wake vortex (not shown) generated in the blowing region M of the cross flow fan 4 can be reduced, and noise can be effectively reduced with a simple configuration.
　切欠４２ｂが翼４２の負圧面４２ｑ及び圧力面４２ｐから見てＶ字状を成すように形成されたため、切欠４２ｂが矩形に形成される場合に比し、翼４２の圧力面積を確保することができる。 Since the notch 42b is formed in a V shape when viewed from the negative pressure surface 42q and the pressure surface 42p of the blade 42, the pressure area of the blade 42 can be secured as compared with the case where the notch 42b is formed in a rectangular shape. it can.
　図５は、図４の５－５線に沿った翼４２の断面図であり、図６は、切欠４２ｂの断面を示す斜視図である。図５及び図６に示すように、本実施形態では、切欠４２ｂの底部４２ｙと負圧面４２ｑとを接続する負圧角部４２ｍ、及び切欠４２ｂの底部４２ｙと圧力面４２ｐとを接続する圧力角部４２ｎの双方に丸みが付けられている。 FIG. 5 is a cross-sectional view of the wing 42 taken along line 5-5 of FIG. 4, and FIG. 6 is a perspective view showing a cross-section of the notch 42b. As shown in FIGS. 5 and 6, in this embodiment, the negative pressure angle portion 42m that connects the bottom portion 42y of the notch 42b and the negative pressure surface 42q, and the pressure angle that connects the bottom portion 42y of the notch 42b and the pressure surface 42p. Both portions 42n are rounded.
　より具体的には、切欠４２ｂにおいて翼４２の負圧面４２ｑに略垂直な方向に延びる底部４２ｙとその負圧面４２ｑとは、負圧角部４２ｍにより滑らかに接続されている。切欠４２ｂにおいて翼４２の圧力面４２ｐに略垂直な方向に延びる底部４２ｙとその圧力面４２ｐとは、圧力角部４２ｎにより滑らかに接続されている。このため、圧力面４２ｐ及び負圧面４２ｑに略垂直な方向に延びる底部４２ｙの長さは、従来の切欠２４２ｂ（図１６参照）の底部２４２ｙの長さよりも短い。 More specifically, the bottom 42y extending in the direction substantially perpendicular to the suction surface 42q of the blade 42 at the notch 42b and the suction surface 42q are smoothly connected by the negative pressure angle portion 42m. A bottom 42y extending in a direction substantially perpendicular to the pressure surface 42p of the blade 42 in the notch 42b and the pressure surface 42p are smoothly connected by a pressure angle portion 42n. For this reason, the length of the bottom portion 42y extending in a direction substantially perpendicular to the pressure surface 42p and the negative pressure surface 42q is shorter than the length of the bottom portion 242y of the conventional notch 242b (see FIG. 16).
　このように、負圧角部４２ｍ及び圧力角部４２ｎは、丸みが付けられることにより滑らかな曲面に形成しているため、図７に示すように、翼４２の外周側から切欠４２ｂへ流入する空気流Ｘは、負圧面４２ｑ及び圧力面４２ｐに沿ってスムーズに羽根車４１内へ流入することができる。その結果、翼４２の外周側から空気流Ｘが切欠４２ｂへ流入する際の衝突損失を低減することができる。 Thus, since the negative pressure corner portion 42m and the pressure corner portion 42n are rounded to form a smooth curved surface, as shown in FIG. 7, the negative pressure corner portion 42m and the pressure corner portion 42n flow into the notch 42b from the outer peripheral side of the blade 42. The air flow X can smoothly flow into the impeller 41 along the negative pressure surface 42q and the pressure surface 42p. As a result, it is possible to reduce the collision loss when the airflow X flows from the outer peripheral side of the blade 42 into the notch 42b.
　本実施形態のクロスフローファン４によれば、以下のような効果を得ることができる。
　（１）切欠４２ｂの底部４２ｙと圧力面４２ｐ及び負圧面４２ｑとをそれぞれ接続する圧力角部４２ｎと負圧角部４２ｍとは、丸みが付けられることにより滑らかな曲面に形成しているため、翼４２の外周側から切欠４２ｂへ流入する空気流Ｘが負圧面４２ｑ及び圧力面４２ｐに沿って羽根車４１内へスムーズに流入することができる。従って、翼４２の外周側から空気流Ｘが切欠４２ｂへ流入する際の衝突損失を低減することができる。その結果、翼４２に切欠が形成されることに起因してクロスフローファン４を駆動する電動モータの出力の増大を抑制することができる。特に、本実施形態においては、負圧角部４２ｍ及び圧力角部４２ｎの双方に丸みが付けられているため、翼４２の外周側から空気流Ｘが流入する際の衝突損失を効果的に低減することができ、クロスフローファン４を駆動する電動モータの出力の増大を効率的に抑制することができる。 According to the cross flow fan 4 of the present embodiment, the following effects can be obtained.
(1) Since the pressure angle portion 42n and the negative pressure angle portion 42m that connect the bottom portion 42y of the notch 42b, the pressure surface 42p, and the negative pressure surface 42q, respectively, are rounded to form a smooth curved surface. The air flow X flowing from the outer peripheral side of the blade 42 into the notch 42b can smoothly flow into the impeller 41 along the negative pressure surface 42q and the pressure surface 42p. Accordingly, it is possible to reduce the collision loss when the airflow X flows from the outer peripheral side of the blade 42 into the notch 42b. As a result, it is possible to suppress an increase in the output of the electric motor that drives the cross flow fan 4 due to the formation of notches in the blades 42. In particular, in this embodiment, since both the negative pressure angle portion 42m and the pressure angle portion 42n are rounded, the collision loss when the airflow X flows from the outer peripheral side of the blade 42 is effectively reduced. Thus, an increase in the output of the electric motor that drives the cross flow fan 4 can be efficiently suppressed.
　（２）切欠４２ｂは、翼４２の負圧面４２ｑ及び圧力面４２ｐから見てＶ字状を成すように形成されたため、翼４２の圧力面積を確保することができる。
　本実施形態において空気調和機は、上記（１）、（２）の効果を得ることができるクロスフローファン４を備えているため、上記（１）、（２）と同様の効果を得ることができる。 (2) Since the notch 42b is formed in a V shape when viewed from the suction surface 42q and the pressure surface 42p of the blade 42, the pressure area of the blade 42 can be secured.
In this embodiment, since the air conditioner includes the cross flow fan 4 that can obtain the effects (1) and (2), the same effects as the above (1) and (2) can be obtained. it can.
　本発明は、上記実施形態に限定されるものではなく、本発明の趣旨に基づいて種々の設計変更をすることが可能であり、それらを本発明の範囲から除外するものではない。例えば、上記実施形態を以下のように変更してもよい。 The present invention is not limited to the above embodiment, and various design changes can be made based on the spirit of the present invention, and they are not excluded from the scope of the present invention. For example, you may change the said embodiment as follows.
　・上記実施形態においては、負圧角部４２ｍ及び圧力角部４２ｎの双方に丸みが付けられている。これに限らず、それらの負圧角部４２ｍ及び圧力角部４２ｎのいずれか一方のみに丸みが付けられてもよい。図８は、負圧角部４２ｍのみに丸みが付けられている構成を示している。図９は、圧力角部４２ｎのみに丸みが付けられている構成を示している。このようにしても、翼４２に切欠が形成されることに起因してクロスフローファン４を駆動する電動モータの出力の増大を抑制することができる。 In the above embodiment, both the negative pressure angle portion 42m and the pressure angle portion 42n are rounded. However, the present invention is not limited to this, and only one of the negative pressure corner portion 42m and the pressure corner portion 42n may be rounded. FIG. 8 shows a configuration in which only the negative pressure angle portion 42m is rounded. FIG. 9 shows a configuration in which only the pressure corner portion 42n is rounded. Even if it does in this way, it can suppress the increase in the output of the electric motor which drives the crossflow fan 4 resulting from notch being formed in the blade | wing 42. FIG.
　・図１０に示すように、切欠４２ｂの底部４２ｙは、外周に向かって全体的に突出する滑らかな曲面に形成されてもよい。このような構成によれば、翼４２の外周側から切欠４２ｂへ流入する空気流Ｘが負圧面４２ｑ又は圧力面４２ｐに沿って羽根車４１内へよりスムーズに流入することができる。従って、翼４２の外周側から空気流Ｘが切欠４２ｂへ流入する際の衝突損失をより一層低減することができ、クロスフローファン４を駆動する電動モータの出力の増大をより効率的に抑制することができる。 As shown in FIG. 10, the bottom 42y of the notch 42b may be formed in a smooth curved surface that protrudes generally toward the outer periphery. According to such a configuration, the airflow X flowing into the notch 42b from the outer peripheral side of the blade 42 can flow more smoothly into the impeller 41 along the negative pressure surface 42q or the pressure surface 42p. Therefore, it is possible to further reduce the collision loss when the airflow X flows into the notch 42b from the outer peripheral side of the blade 42, and more efficiently suppress the increase in the output of the electric motor that drives the crossflow fan 4. be able to.
　・上記実施形態においては、切欠４２ｂは、翼４２の負圧面４２ｑ及び圧力面４２ｐから見てＶ字状を成すように形成されているが、このように構成されていなくてもよい。例えば、図１１～図１３に示すように、切欠４２ｂは、翼４２の負圧面４２ｑ及び圧力面４２ｐから見て矩形を成すように形成されてもよい。図１２の５－５線に沿った断面図は、図５と同じである。このように、切欠４２ｂが矩形に形成された場合であっても、負圧角部４２ｍ及び圧力角部４２ｎの少なくとも一方に丸みが付けられていれば、翼４２に切欠が形成されることに起因してクロスフローファン４を駆動する電動モータの出力の増大を抑制することができる。更に、このように切欠４２ｂが矩形に形成された場合に、切欠４２ｂの底部４２ｙは、羽根車４１の外周に向かって全体的に突出する曲面に形成されてもよい。 In the above-described embodiment, the notch 42b is formed in a V shape when viewed from the suction surface 42q and the pressure surface 42p of the blade 42, but may not be configured in this manner. For example, as shown in FIGS. 11 to 13, the notch 42b may be formed to have a rectangular shape when viewed from the suction surface 42q and the pressure surface 42p of the blade 42. A sectional view taken along line 5-5 of FIG. 12 is the same as FIG. Thus, even if the notch 42b is formed in a rectangular shape, if at least one of the negative pressure angle portion 42m and the pressure angle portion 42n is rounded, a notch is formed in the blade 42. As a result, an increase in the output of the electric motor that drives the cross flow fan 4 can be suppressed. Furthermore, when the notch 42b is formed in a rectangular shape in this way, the bottom 42y of the notch 42b may be formed in a curved surface that protrudes entirely toward the outer periphery of the impeller 41.

Claims (6)

  1. 　羽根車の回転軸線上に位置する複数の支持板と、前記支持板の周縁部に設けられ、前記回転軸線と平行に延びる複数の板状の翼とによって構成された羽根車を備え、前記翼は同翼の外側縁が内側縁よりも前記羽根車の回転方向の前側に位置するように傾斜し、前記翼の両側面のうち前記羽根車の回転方向の前側に位置する側面は圧力面を構成し、前記回転方向の後側に位置する側面は負圧面を構成するクロスフローファンにおいて、
    　前記翼の外側縁には、複数の切欠が前記羽根車の回転軸線に沿って所定間隔で形成され、
    　前記各切欠の底部と前記圧力面とを接続する圧力角部、及び前記各切欠の底部と前記負圧面とを接続する負圧角部の少なくとも一方に丸みが付けられている
    　ことを特徴とするクロスフローファン。     An impeller comprising a plurality of support plates positioned on a rotation axis of the impeller and a plurality of plate-like blades provided at a peripheral portion of the support plate and extending in parallel with the rotation axis; Is inclined such that the outer edge of the blade is located on the front side in the rotational direction of the impeller relative to the inner edge, and the side surface located on the front side in the rotational direction of the impeller of both side surfaces of the blade is a pressure surface. The cross flow fan in which the side surface located on the rear side in the rotational direction constitutes a suction surface,
    A plurality of notches are formed in the outer edge of the blade at predetermined intervals along the rotation axis of the impeller,
    At least one of a pressure angle portion connecting the bottom portion of each notch and the pressure surface and a negative pressure angle portion connecting the bottom portion of each notch and the suction surface is rounded. Cross flow fan.
  2. 　前記切欠の底部と前記負圧面とを接続する前記負圧角部には丸みが付けられている
    　ことを特徴とする請求項１に記載のクロスフローファン。     The crossflow fan according to claim 1, wherein the negative pressure angle portion connecting the bottom portion of the notch and the negative pressure surface is rounded.
  3. 　前記切欠の底部と前記圧力面とを接続する前記圧力角部には丸みが付けられている
    　ことを特徴とする請求項１または請求項２に記載のクロスフローファン。     The cross flow fan according to claim 1 or 2, wherein the pressure corner portion connecting the bottom portion of the notch and the pressure surface is rounded.
  4. 　羽根車の回転軸線上に位置する複数の支持板と、前記支持板の周縁部に設けられ、前記回転軸線と平行に延びる複数の板状の翼とによって構成された羽根車を備え、前記翼は同翼の外側縁が内側縁よりも前記羽根車の回転方向の前側に位置するように傾斜し、前記翼の両側面のうち前記羽根車の回転方向の前側に位置する側面は圧力面を構成し、前記回転方向の後側に位置する側面は負圧面を構成するクロスフローファンにおいて、
    　前記翼の外側縁には、複数の切欠が前記羽根車の回転軸線に沿って所定間隔で形成され、
    　前記切欠の底部は、前記羽根車の外周に向かって全体的に突出する曲面に形成されている
    　ことを特徴とするクロスフローファン。     An impeller comprising a plurality of support plates positioned on a rotation axis of the impeller and a plurality of plate-like blades provided at a peripheral portion of the support plate and extending in parallel with the rotation axis; Is inclined such that the outer edge of the blade is located on the front side in the rotational direction of the impeller relative to the inner edge, and the side surface located on the front side in the rotational direction of the impeller of both side surfaces of the blade is a pressure surface. The cross flow fan in which the side surface located on the rear side in the rotational direction constitutes a suction surface,
    A plurality of notches are formed in the outer edge of the blade at predetermined intervals along the rotation axis of the impeller,
    The cross flow fan, wherein the bottom of the notch is formed in a curved surface that protrudes generally toward the outer periphery of the impeller.
  5. 　前記切欠は、前記翼の負圧面及び圧力面から見てＶ字状を成す
    　ことを特徴とする請求項１乃至請求項４のいずれか一項に記載のクロスフローファン。     The cross flow fan according to any one of claims 1 to 4, wherein the notch has a V shape when viewed from a suction surface and a pressure surface of the blade.
  6. 　請求項１乃至請求項５のいずれか一項に記載のクロスフローファンを備えることを特徴とする空気調和機。 An air conditioner comprising the crossflow fan according to any one of claims 1 to 5.
PCT/JP2009/058448 2008-05-09 2009-04-30 Cross‑flow fan and air conditioner equipped with same WO2009136585A1 (en)

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KR1020107023472A KR101233538B1 (en) 2008-05-09 2009-04-30 Cross-flow fan and air conditioner equipped with same
CN2009801127280A CN101999044B (en) 2008-05-09 2009-04-30 Cross flow fan and air conditioner equipped with same
US12/937,833 US20110033306A1 (en) 2008-05-09 2009-04-30 Cross-flow fan and air conditioner equipped with same
EP09742709.0A EP2280176B1 (en) 2008-05-09 2009-04-30 Cross flow fan and air conditioner equipped with same
ES09742709T ES2784543T3 (en) 2008-05-09 2009-04-30 Cross-flow fan and air conditioner equipped with it
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Publication number Priority date Publication date Assignee Title
US20130330184A1 (en) * 2012-06-08 2013-12-12 General Electric Company Aerodynamic element of turbine engine
JP6044165B2 (en) * 2012-08-09 2016-12-14 ダイキン工業株式会社 Multi-blade fan and air conditioner indoor unit including the same
JP5747888B2 (en) * 2012-09-28 2015-07-15 ダイキン工業株式会社 Blower
US9651057B2 (en) * 2013-12-19 2017-05-16 Regal Beloit America, Inc. Blower assembly including a noise attenuating impeller and method for assembling the same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03210094A (en) * 1990-01-11 1991-09-13 Matsushita Electric Ind Co Ltd Cross flow fan
JPH10252689A (en) * 1997-03-17 1998-09-22 Mitsubishi Electric Corp Cross flow fan and cross-flow-fan-mounted air-conditioner
JPH11141494A (en) * 1997-11-10 1999-05-25 Daikin Ind Ltd Impeller structure of multiblade blower
JP2006125390A (en) 2004-09-30 2006-05-18 Daikin Ind Ltd Impeller for blower, and air conditioner using the same
WO2007037216A1 (en) * 2005-09-28 2007-04-05 Daikin Industries, Ltd. Impeller of multiblade blower and method of manufacturing the same

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3403893A (en) * 1967-12-05 1968-10-01 Gen Electric Axial flow compressor blades
NL9301910A (en) * 1993-11-04 1995-06-01 Stork Prod Eng Wind turbine.
JP3127850B2 (en) * 1997-02-13 2001-01-29 ダイキン工業株式会社 Impeller for propeller fan
JP3092554B2 (en) * 1997-09-30 2000-09-25 ダイキン工業株式会社 Centrifugal blower, method for manufacturing the same, and air conditioner equipped with the centrifugal blower
JP4873845B2 (en) * 2004-10-01 2012-02-08 三菱電機株式会社 Air conditioner
JP4973249B2 (en) * 2006-03-31 2012-07-11 ダイキン工業株式会社 Multi-wing fan
JP4918650B2 (en) * 2006-06-23 2012-04-18 ダイキン工業株式会社 Multi-wing fan
JP4433093B2 (en) * 2008-05-09 2010-03-17 ダイキン工業株式会社 Cross flow fan and air conditioner equipped with the same
KR101313420B1 (en) * 2009-03-10 2013-10-01 다이킨 고교 가부시키가이샤 Crossflow fan and air conditioner provided with same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03210094A (en) * 1990-01-11 1991-09-13 Matsushita Electric Ind Co Ltd Cross flow fan
JPH10252689A (en) * 1997-03-17 1998-09-22 Mitsubishi Electric Corp Cross flow fan and cross-flow-fan-mounted air-conditioner
JPH11141494A (en) * 1997-11-10 1999-05-25 Daikin Ind Ltd Impeller structure of multiblade blower
JP2006125390A (en) 2004-09-30 2006-05-18 Daikin Ind Ltd Impeller for blower, and air conditioner using the same
WO2007037216A1 (en) * 2005-09-28 2007-04-05 Daikin Industries, Ltd. Impeller of multiblade blower and method of manufacturing the same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2280176A4

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EP2280176A4 (en) 2016-10-26
AU2009245176B2 (en) 2011-08-11
ES2784543T3 (en) 2020-09-28
JP2009270530A (en) 2009-11-19
KR20100135831A (en) 2010-12-27
EP2280176B1 (en) 2020-01-22
JP4371171B2 (en) 2009-11-25
EP2280176A1 (en) 2011-02-02
AU2009245176A1 (en) 2009-11-12
CN101999044B (en) 2012-10-17
US20110033306A1 (en) 2011-02-10
KR101233538B1 (en) 2013-02-14
CN101999044A (en) 2011-03-30

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