JPH05164090A - Blower - Google Patents

Abstract

PURPOSE:To reduce blowing noise and to improve blowing performance by forming notches on the delivery side of each of blades provided in plural on the outer circumference of a hub mounted on a motor and by inserting rings in the almost cylindrical state supported by the delivery side of the impeller into these notches. CONSTITUTION:An axial blower 12 is provided with an impeller 14 consisting of a plurality of blades 13 on the periphery of a hub 4 mounted to a motor 2 and an orifice 6 surrounding the outer circumference of a delivery side 13c of the blade 13, and notches are formed on the outer circumference of each of the plurality of blades 13. Also, a cylinder 15 is provided that is located at the delivery side 13c of the blade 13 and one of the suction side is inserted into the notch of blade 13, and it is fixed to the orifice 16 by a supporting plate 16. By this, when the blower is operated in the condition that ventilation resistance is higher than the design operation point, a part of air flow flowing from the suction side and the outer circumference side of the blade is prevented from reversing to the pressurizing side and negative pressure side of the blade 13 on the outer circumference of the delivery side of the blade 13.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、空気調和機などに用い
られる送風機に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blower used in an air conditioner or the like.

【０００２】[0002]

【従来の技術】近年、軸流送風機などの送風機は、セパ
レート型空気調和機などの送風機として、業務用から家
庭用まで幅広く使用されており、機器の小型化、機器の
設置条件の多様化に伴い、より高性能化・低騒音化が望
まれる傾向にある。2. Description of the Related Art In recent years, blowers such as axial blowers have been widely used as blowers such as separate type air conditioners from commercial use to household use, and are being used for downsizing of equipment and diversification of equipment installation conditions. Accordingly, there is a tendency for higher performance and lower noise.

【０００３】以下、図面を参照しながら、上述した従来
の送風機について説明する。図７、図８は従来の軸流型
の送風機の構造を示すものであり、図９は従来の軸流型
の送風機が搭載されたセパレート型空気調和機の室外機
の構造を示すものである。図において１は軸流型の送風
機であり、２はモータであり、３はモータ２に取り付け
られたハブ４と、前記ハブ４の周囲に設けられた複数の
羽根５とから成る羽根車であり、６は羽根５の吐出側５
ｃの外周を囲むオリフィスである。７はセパレート型空
気調和機の室外機であり、８は箱体である。９は送風機
１の吸い込み側に設けられた熱交換器であり、１０は箱
体８の内部に設けられた圧縮機である。１１は送風機１
の吐出側に設けられたファンガードである。The conventional blower described above will be described below with reference to the drawings. 7 and 8 show the structure of a conventional axial-flow blower, and FIG. 9 shows the structure of an outdoor unit of a separate type air conditioner equipped with a conventional axial-flow blower. .. In the figure, 1 is an axial-flow type blower, 2 is a motor, and 3 is an impeller composed of a hub 4 attached to the motor 2 and a plurality of blades 5 provided around the hub 4. , 6 is the discharge side 5 of the blade 5.
It is an orifice that surrounds the outer circumference of c. Reference numeral 7 is an outdoor unit of a separate type air conditioner, and 8 is a box. Reference numeral 9 is a heat exchanger provided on the suction side of the blower 1, and 10 is a compressor provided inside the box 8. 11 is a blower 1
Is a fan guard provided on the discharge side of.

【０００４】以上のように構成された軸流型の送風機に
ついて以下その動作を説明する。まず、モータ２により
羽根車３が所定の回転方向に回転すると、熱交換器９を
通過し熱交換した空気が、羽根車３内に流入し、羽根５
の作用で静圧と動圧を付加されて羽根車３外に吐出され
て送風作用を為す。The operation of the axial-flow type blower configured as described above will be described below. First, when the impeller 3 is rotated in a predetermined rotation direction by the motor 2, the air that has passed through the heat exchanger 9 and has undergone heat exchange flows into the impeller 3 and the impeller 5
The static pressure and dynamic pressure are added by the action of and are discharged to the outside of the impeller 3 to perform the blowing action.

【０００５】[0005]

【発明が解決しようとする課題】しかしながら、上記の
ような構成では、図１０で示すように、送風機１を搭載
した室外機７が、機器の小型化や吐出側に余裕のない狭
い場所に設置されるなど、設計動作点より通風抵抗が高
い条件で運転される場合、図８に示す速度ベクトル図の
ように、羽根５の吸い込み側５ａおよび外周側５ｂから
流入する気流の一部は、徐々に軸方向速度成分が低下
し、半径速度成分が増加し、羽根５の吐出側５ｃの外周
部で羽根５の加圧面側から吹き出し、再び羽根５の負圧
面側に吸い込まれ逆流するため、羽根５の吐出側５ｃの
外周部で流れが大きく乱れ、また、流体の流れが阻害さ
れる。However, in the above-mentioned structure, as shown in FIG. 10, the outdoor unit 7 having the blower 1 is installed in a narrow space where the size of the device is small and the discharge side has no margin. When the engine is operated under the condition that the ventilation resistance is higher than the designed operating point, as shown in the velocity vector diagram of FIG. 8, a part of the airflow flowing from the suction side 5a and the outer peripheral side 5b of the blade 5 is gradually increased. The axial velocity component decreases, the radial velocity component increases, and the outer peripheral portion of the discharge side 5c of the blade 5 blows out from the pressure surface side of the blade 5 and is sucked into the suction surface side of the blade 5 again to flow backward, The flow is greatly disturbed at the outer peripheral portion of the discharge side 5c of No. 5, and the flow of the fluid is disturbed.

【０００６】従って、羽根車３から発生する乱流音が増
加して、送風機１の送風騒音が増加し、また、送風性能
も劣化していた。したがって、送風機１が、設計動作点
より通風抵抗が高い条件で運転される場合、送風機１の
送風騒音の増加と、送風性能の劣化を抑えなければなら
ないという課題を有していた。Therefore, the turbulent sound generated from the impeller 3 is increased, the blowing noise of the blower 1 is increased, and the blowing performance is deteriorated. Therefore, when the blower 1 is operated under the condition that the ventilation resistance is higher than the design operating point, there is a problem that the blower noise of the blower 1 must be increased and the deterioration of the blower performance must be suppressed.

【０００７】本発明は上記課題に鑑み、送風機が設計動
作点より通風抵抗が高い条件で運転される場合、羽根の
吸い込み側および外周側から流入する気流の一部が、徐
々に軸方向速度成分が低下し半径速度成分が増加し、羽
根の吐出側の外周部で羽根の加圧面側から吹き出し、再
び羽根の負圧面側に吸い込まれ逆流するのを防止し、さ
らに、オリフィス吐出側壁面まで付着して流れ、送風機
の送風騒音の増加とともに送風性能の劣化を抑える送風
機を提供するものである。In view of the above problems, according to the present invention, when the blower is operated under the condition that the ventilation resistance is higher than the design operating point, a part of the airflow flowing from the suction side and the outer peripheral side of the blade gradually increases in the axial velocity component. And the radial velocity component increases, and it is prevented from blowing out from the pressure side of the blade at the outer periphery of the discharge side of the blade, being sucked again to the negative pressure side of the blade and flowing backward, and further adhering to the orifice discharge side wall surface. The present invention provides a blower that suppresses the deterioration of the blower performance as well as the increase in the blower noise of the blower.

【０００８】[0008]

【課題を解決するための手段】この課題を解決するため
に、本発明の送風機は、モータと、前記モータに取り付
けられたハブと、前記ハブの周囲に設けられ、吐出側に
切り欠きを有する複数の羽根とで構成された羽根車と、
前記羽根の吐出側の外周を囲むオリフィスと、前記羽根
の吐出側に位置し、吸い込み側の一方を前記羽根の切り
欠き内に挿入した略円筒状のリングとで構成されてい
る。In order to solve this problem, a blower of the present invention has a motor, a hub attached to the motor, a hub provided around the hub, and a cutout on the discharge side. An impeller composed of a plurality of blades,
It is composed of an orifice that surrounds the outer circumference of the discharge side of the blade, and a substantially cylindrical ring that is located on the discharge side of the blade and one of the suction sides is inserted into the notch of the blade.

【０００９】他の発明は、モータと、前記モータに取り
付けられたハブと、前記ハブの周囲に設けられた複数の
羽根とで構成された羽根車と、前記羽根の吐出側の外周
を囲むオリフィスと、前記羽根の吐出側に位置し、吸い
込み側の一方を前記羽根の吐出部より吸い込み側に固定
した略円筒状のリングとで構成されている。According to another aspect of the invention, an impeller composed of a motor, a hub attached to the motor, and a plurality of blades provided around the hub, and an orifice surrounding the discharge side outer periphery of the blade. And a substantially cylindrical ring located on the discharge side of the blade and having one of the suction sides fixed to the suction side from the discharge portion of the blade.

【００１０】[0010]

【作用】本発明では、リングの吸い込み側の一方を羽根
の切り欠き内に挿入した構成、もしくは、リングの吸い
込み側の一方を羽根の吐出部より吸い込み側に固定した
構成となっているので、送風機が設計動作点より通風抵
抗が高い条件で運転される場合、羽根の吸い込み側およ
び外周側から流入する気流の一部が、リングに沿って流
れ、羽根の吐出側の外周部で逆流するのを防止し、か
つ、オリフィス吐出側の壁面まで沿って流れる。In the present invention, one of the suction sides of the ring is inserted into the notch of the blade, or one of the suction sides of the ring is fixed to the suction side from the discharge portion of the blade. When the blower is operated under the condition that the ventilation resistance is higher than the design operating point, a part of the airflow that flows from the suction side and the outer peripheral side of the blade flows along the ring and flows backward at the outer peripheral portion on the discharge side of the blade. And also flows along the wall surface on the discharge side of the orifice.

【００１１】[0011]

【実施例】以下、本発明の実施例について図面を参照し
ながら説明する。尚、従来例と同一構成の部分について
は重複を避ける為、同一の符号を付けて説明を省略す
る。Embodiments of the present invention will be described below with reference to the drawings. In addition, in order to avoid duplication, the same components as those of the conventional example will be denoted by the same reference numerals and description thereof will be omitted.

【００１２】図１、図２は本発明の第１の実施例におけ
る軸流型の送風機の構造を示すものであり、図３は本発
明の第１の実施例における軸流型の送風機が搭載された
セパレート型空気調和機の室外機の構造を示すものであ
る。1 and 2 show the structure of an axial flow type blower according to the first embodiment of the present invention, and FIG. 3 is equipped with the axial flow type blower according to the first embodiment of the present invention. 2 shows a structure of an outdoor unit of the separated type air conditioner.

【００１３】図において、１２は軸流型の送風機で、モ
ータ２と、モータ２に取り付けられたハブ４と、ハブ４
の周囲に設けられ、外周に切り欠きを有する複数の羽根
１３とから成る羽根車１４とを備えている。また、羽根
１３の吐出側１３ｃの外周を囲むオリフィス６と、羽根
１３の吐出側１３ｃに位置し、吸い込み側の一方を羽根
１３に接触することなく、羽根１３の切り欠き内に挿入
したリング１５とを備えている。また、リング１５は、
支持板１６によってオリフィス６に固定した構成となっ
ている。In the figure, 12 is an axial flow type blower, which is a motor 2, a hub 4 attached to the motor 2, and a hub 4.
And an impeller 14 including a plurality of blades 13 having a notch on the outer periphery thereof. Further, the orifice 6 surrounding the outer circumference of the discharge side 13c of the blade 13 and the ring 15 inserted in the cutout of the blade 13 located on the discharge side 13c of the blade 13 without contacting one of the suction sides with the blade 13. It has and. Also, the ring 15 is
The support plate 16 is fixed to the orifice 6.

【００１４】以上のように構成された軸流型の送風機の
羽根車について以下その動作を説明する。The operation of the impeller of the axial-flow type blower configured as described above will be described below.

【００１５】まず、モータ２により羽根車１４が所定の
回転方向に回転すると、熱交換器９を通過し熱交換した
空気が、羽根車１４内に流入し、羽根１３の作用で静圧
と動圧を付加されて羽根車１４外に吐出されて送風機１
２が送風作用を為す。First, when the impeller 14 is rotated in a predetermined rotation direction by the motor 2, the air that has passed through the heat exchanger 9 and has undergone heat exchange flows into the impeller 14 and the static pressure and dynamic pressure are exerted by the action of the vanes 13. The blower 1 is pressurized and discharged to the outside of the impeller 14
2 acts as an air blower.

【００１６】ここで、送風機１２が設計動作点より通風
抵抗が高い条件で運転される場合、図１で示すように、
羽根１３の吸い込み側１３ａおよび外周側１３ｂから流
入する気流の一部は、吸い込み側から吐出側方向に向か
って外周方向に広がる略円筒状のリング１５の壁面に沿
って流れるため、徐々に軸方向速度成分が低下し、半径
速度成分が増加することがなく、よって、羽根１３の吐
出側１３ｃの外周部で羽根１３の加圧面側から吹き出
し、再び羽根１３の負圧面側に吸い込まれ逆流して流れ
が乱れる現象が抑制され、さらに、オリフィス６の吐出
側６ｂの壁面まで沿って流れる。When the blower 12 is operated under the condition that the ventilation resistance is higher than the design operating point, as shown in FIG.
Since a part of the airflow flowing from the suction side 13a and the outer peripheral side 13b of the blade 13 flows along the wall surface of the substantially cylindrical ring 15 that spreads from the suction side toward the discharge side in the outer peripheral direction, the axial direction gradually increases. The velocity component does not decrease and the radial velocity component does not increase. Therefore, the outer peripheral portion of the discharge side 13c of the blade 13 blows out from the pressure surface side of the blade 13, is sucked again to the negative pressure surface side of the blade 13, and flows backward. The phenomenon in which the flow is disturbed is suppressed, and the flow further flows along the wall surface of the discharge side 6b of the orifice 6.

【００１７】以上のように本実施例によれば、羽根１３
の切り欠き内にリング１５の吸い込み側の一方を挿入す
ることにより、送風機１２が設計動作点より通風抵抗が
高い条件で運転される場合、羽根の吸い込み側および外
周側から流入する気流の一部が、リング１５に沿って流
れ、羽根１３の吐出側１３ｃの外周部で羽根１３の加圧
面側から負圧面側へ逆流し流れが乱れる現象を抑制し、
かつ、オリフィス６の吐出側６ｂの壁面まで沿って流れ
ることによって、流れが促進する。As described above, according to this embodiment, the blade 13
When one of the suction sides of the ring 15 is inserted into the notch of the fan 15, when the blower 12 is operated under the condition that the ventilation resistance is higher than the design operating point, a part of the air flow that flows from the suction side and the outer peripheral side of the blades. However, it suppresses the phenomenon that the current flows along the ring 15 and flows backward from the pressure surface side of the blade 13 to the suction surface side at the outer peripheral portion of the discharge side 13c of the blade 13, and the flow is disturbed.
Moreover, the flow is promoted by flowing along the wall surface of the discharge side 6b of the orifice 6.

【００１８】従って、送風機１２が設計動作点より通風
抵抗が高い条件で運転される場合、送風機１２の送風騒
音の増加を抑え、また、送風性能の劣化も抑えることが
できる。Therefore, when the blower 12 is operated under the condition that the ventilation resistance is higher than the design operating point, it is possible to suppress an increase in the blowing noise of the blower 12 and also to suppress the deterioration of the blowing performance.

【００１９】以下、本発明の第２の実施例について図面
を参照しながら説明する。図４、図５は本発明の第２の
実施例における軸流型の送風機の構造を示すものであ
り、図６は本発明の第２の実施例における軸流型の送風
機が搭載されたセパレート型空気調和機の室外機の構造
を示すものである。第１の実施例の図１、図２、図３と
異なるのは、従来の羽根５の吐出側５ｃに、略円筒状の
リング１７の吸い込み側の一方を羽根５の吐出部５ｃよ
り吸い込み側５ａに直接固定した点である。A second embodiment of the present invention will be described below with reference to the drawings. FIG. 4 and FIG. 5 show the structure of the axial flow type blower in the second embodiment of the present invention, and FIG. 6 shows the separate type equipped with the axial flow type blower in the second embodiment of the present invention. 1 shows a structure of an outdoor unit of a type air conditioner. 1, 2 and 3 of the first embodiment are different from the discharge side 5c of the conventional blade 5 in that one of the suction sides of the substantially cylindrical ring 17 is closer to the discharge side 5c of the blade 5 than the suction side. This is a point directly fixed to 5a.

【００２０】以上のように構成された軸流型の送風機の
羽根車について以下その動作を説明する。The operation of the impeller of the axial flow type blower configured as described above will be described below.

【００２１】まず、モータ２により羽根車１８が所定の
回転方向に回転すると、熱交換器９を通過し熱交換した
空気が、羽根車１８内に流入し、羽根５の作用で静圧と
動圧を付加されて羽根車１８外に吐出されて送風機１９
が送風作用を為す。First, when the impeller 18 is rotated in a predetermined rotation direction by the motor 2, the air that has passed through the heat exchanger 9 and has undergone heat exchange flows into the impeller 18, and the action of the impeller 5 causes static pressure and dynamic movement. A blower 19 is supplied with pressure and discharged to the outside of the impeller 18.
Acts as an air blower.

【００２２】ここで、送風機１９が設計動作点より通風
抵抗が高い条件で運転される場合、図４で示すように、
羽根５の吸い込み側５ａおよび外周側５ｂから流入する
気流の一部は、吸い込み側から吐出側方向に向かって外
周方向に広がる略円筒状のリング１７の壁面に沿って流
れるため、徐々に軸方向速度成分が低下し、半径速度成
分が増加することがなく、よって、羽根５の吐出側５ｃ
の外周部で羽根５の加圧面側から吹き出し、再び羽根５
の負圧面側に吸い込まれ逆流して流れが乱れる現象が抑
制され、さらに、オリフィス６の吐出側６ｂの壁面まで
沿って流れる。Here, when the blower 19 is operated under the condition that the ventilation resistance is higher than the design operating point, as shown in FIG.
Since a part of the airflow flowing from the suction side 5a and the outer peripheral side 5b of the blade 5 flows along the wall surface of the substantially cylindrical ring 17 that spreads in the outer peripheral direction from the suction side toward the discharge side, the airflow gradually increases in the axial direction. The velocity component does not decrease and the radial velocity component does not increase. Therefore, the discharge side 5c of the blade 5
Is blown from the pressing surface side of the blade 5 at the outer peripheral portion of
The phenomenon in which the flow is disturbed by being sucked into the negative pressure surface side of the nozzle and backflowing is suppressed, and further flows along the wall surface of the discharge side 6b of the orifice 6.

【００２３】以上のように本実施例によれば、羽根５の
吐出側５ｃに、略円筒状のリング１７の吸い込み側の一
方を羽根５の吐出側５ｃより吸い込み側５ａに直接固定
することにより、送風機１９が設計動作点より通風抵抗
が高い条件で運転される場合、羽根５の吸い込み側５ａ
および外周側５ｂから流入する気流の一部が、リング１
７に沿って流れ、羽根５の吐出側５ｃの外周部で羽根５
の加圧面側から負圧面側へ逆流し流れが乱れる現象を抑
制し、かつ、オリフィス６の吐出側６ｂの壁面まで沿っ
て流れることによって、流れを促進し、さらに、構造を
簡単にするため生産性が高くなり、かつ、羽根車の強度
が増加するため破壊に対する信頼性も向上する。As described above, according to this embodiment, one of the suction sides of the substantially cylindrical ring 17 is directly fixed to the discharge side 5c of the blade 5 from the discharge side 5c of the blade 5 to the suction side 5a. When the blower 19 is operated under the condition that the ventilation resistance is higher than the design operating point, the suction side 5a of the blade 5
And a part of the air flow that flows in from the outer peripheral side 5b is
7 along the outer periphery of the discharge side 5c of the blade 5
In order to suppress the phenomenon of backflow from the pressurizing surface side to the negative pressure surface side and disturb the flow, and to flow along the wall surface of the discharge side 6b of the orifice 6, the flow is promoted, and further, the structure is simplified. Of the impeller, and the strength of the impeller is increased, so that the reliability against breakage is also improved.

【００２４】従って、送風機１９が設計動作点より通風
抵抗が高い条件で運転される場合、送風機１９の送風騒
音の増加を抑え、また、送風性能の劣化も抑えることも
でき、さらに、生産性を高め、羽根車の信頼性を向上で
きる。Therefore, when the blower 19 is operated under the condition that the ventilation resistance is higher than the design operating point, it is possible to suppress an increase in the blower noise of the blower 19 and also to suppress the deterioration of the blower performance, and further to improve the productivity. It can increase the reliability of the impeller.

【００２５】[0025]

【発明の効果】以上のように本発明は、モータと、前記
モータに取り付けられたハブと、前記ハブの周囲に設け
られ、吐出側に切り欠きを有する複数の羽根とで構成さ
れた羽根車と、前記羽根の吐出側の外周を囲むオリフィ
スと、前記羽根の吐出側に位置し、吸い込み側の一方を
前記羽根の切り欠き内に挿入した略円筒状のリングとで
構成することにより、送風機が設計動作点より通風抵抗
が高い条件で運転される場合、羽根の吸い込み側および
外周側から流入する気流の一部が、羽根の吐出側の外周
部で羽根の加圧面側から負圧面側へ逆流するのを防止
し、さらに、リングに沿って流れ、オリフィスの吐出側
の壁面まで沿って流れることによって流れを促進し、送
風機の送風騒音の増加とともに送風性能の劣化を抑える
ことができる。As described above, the present invention has an impeller including a motor, a hub attached to the motor, and a plurality of blades provided around the hub and having a cutout on the discharge side. And an orifice surrounding the discharge-side outer periphery of the blade, and a substantially cylindrical ring located on the discharge side of the blade and having one of the suction sides inserted into the notch of the blade, Is operated under conditions where the draft resistance is higher than the design operating point, part of the airflow that flows from the suction side and outer peripheral side of the blade moves from the pressure side of the blade to the negative pressure side at the outer periphery of the discharge side of the blade. It is possible to prevent the backflow and further promote the flow by flowing along the ring and up to the wall surface on the discharge side of the orifice, thereby increasing the blowing noise of the blower and suppressing the deterioration of the blowing performance.

【００２６】また、モータと、前記モータに取り付けら
れたハブと、前記ハブの周囲に設けられた複数の羽根と
で構成された羽根車と、前記羽根の吐出側の外周を囲む
オリフィスと、前記羽根の吐出側に位置し、吸い込み側
の一方を前記羽根の吐出部より吸い込み側に固定した略
円筒状のリングとで構成することにより、送風機が設計
動作点より通風抵抗が高い条件で運転される場合、羽根
の吸い込み側および外周側から流入する気流の一部が、
羽根の吐出側の外周部で羽根の加圧面側から負圧面側へ
逆流するのを防止し、リングに沿って流れ、オリフィス
の吐出側の壁面まで沿って流れることによって流れを促
進し、送風機の送風騒音の増加とともに送風性能の劣化
を抑えることができ、さらに、構造を簡単にするため生
産性が高くなり、かつ、羽根車の強度が増加するため破
壊に対する信頼性をも向上できる。Also, an impeller composed of a motor, a hub attached to the motor, and a plurality of blades provided around the hub, an orifice surrounding an outer periphery of the discharge side of the blade, and The blower is operated under the condition that the ventilation resistance is higher than the designed operating point, because it is located on the discharge side of the blade, and one of the suction sides is composed of a substantially cylindrical ring that is fixed to the suction side from the discharge part of the blade. Part of the airflow that flows in from the suction side and the outer peripheral side of the blade,
Prevents backflow from the pressure side of the blade to the suction side at the outer periphery of the discharge side of the blade, flows along the ring, and promotes the flow by flowing along the wall of the discharge side of the orifice. It is possible to suppress the deterioration of the ventilation performance as well as the increase of the ventilation noise. Further, the structure is simplified, so that the productivity is increased, and the strength of the impeller is increased, so that the reliability against breakage can be improved.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の第１の実施例の送風機が設計動作点よ
り通風抵抗が高い条件で運転される場合の気流を示す要
部断面図FIG. 1 is a cross-sectional view of a main part showing an air flow when a blower according to a first embodiment of the present invention is operated under a condition where ventilation resistance is higher than a design operating point.

【図２】本発明の第１の実施例における軸流型の送風機
の断面図FIG. 2 is a cross-sectional view of the axial flow type blower according to the first embodiment of the present invention.

【図３】本発明の第１の実施例における軸流型の送風機
を搭載したセパレート型空気調和機の室外機の断面図FIG. 3 is a cross-sectional view of the outdoor unit of the separate type air conditioner equipped with the axial flow type blower according to the first embodiment of the present invention.

【図４】本発明の第２の実施例の送風機が設計動作点よ
り通風抵抗が高い条件で運転される場合の気流を示す要
部断面図FIG. 4 is a cross-sectional view of essential parts showing an air flow when the blower according to the second embodiment of the present invention is operated under a condition where ventilation resistance is higher than a design operating point.

【図５】本発明の第２の実施例における軸流型の送風機
の断面図FIG. 5 is a sectional view of an axial-flow type blower according to a second embodiment of the present invention.

【図６】本発明の第２の実施例における軸流型の送風機
を搭載したセパレート型空気調和機の室外機の断面図FIG. 6 is a sectional view of an outdoor unit of a separate type air conditioner equipped with an axial-flow type blower according to a second embodiment of the present invention.

【図７】従来の軸流型の送風機の断面図FIG. 7 is a sectional view of a conventional axial-flow blower.

【図８】従来の送風機が設計動作点より通風抵抗が高い
条件で運転される場合の翼間の流れを計測した結果を示
す速度ベクトル図FIG. 8 is a velocity vector diagram showing a result of measuring a flow between blades when a conventional blower is operated under a condition where ventilation resistance is higher than a design operating point.

【図９】従来の軸流型の送風機を搭載したセパレート型
空気調和機の室外機の断面図FIG. 9 is a cross-sectional view of an outdoor unit of a separate type air conditioner equipped with a conventional axial-flow blower.

【図１０】本発明の実施例における軸流型の送風機と従
来の軸流型の送風機の設計動作点と運転動作点を示す空
力特性図FIG. 10 is an aerodynamic characteristic diagram showing design operating points and operating operating points of the axial-flow type blower in the embodiment of the present invention and the conventional axial-flow type blower.

【符号の説明】[Explanation of symbols]

２ モータ ４ ハブ ５ 羽根 ６ オリフィス １２ 送風機 １３ 羽根 １４ 羽根車 １５ リング １７ リング １８ 羽根車 １９ 送風機 2 Motor 4 Hub 5 Blade 6 Orifice 12 Blower 13 Blade 14 Impeller 15 Ring 17 Ring 18 Impeller 19 Blower

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 モータと、前記モータに取り付けられた
ハブと、前記ハブの周囲に設けられ、吐出側に切り欠き
を有する複数の羽根とで構成された羽根車と、前記羽根
の吐出側の外周を囲むオリフィスと、前記羽根の吐出側
に位置し、吸い込み側の一方を前記羽根の切り欠き内に
挿入した略円筒状のリングとで構成された送風機。1. An impeller composed of a motor, a hub attached to the motor, and a plurality of blades provided around the hub and having a cutout on the discharge side, and a blade on the discharge side of the blade. A blower composed of an orifice that surrounds the outer circumference and a substantially cylindrical ring that is located on the discharge side of the blade and one of the suction sides is inserted into the notch of the blade. 【請求項２】 モータと、前記モータに取り付けられた
ハブと、前記ハブの周囲に設けられた複数の羽根とで構
成された羽根車と、前記羽根の吐出側の外周を囲むオリ
フィスと、前記羽根の吐出側に位置し、吸い込み側の一
方を前記羽根の吐出部より吸い込み側に固定した略円筒
状のリングとで構成された送風機。2. An impeller comprising a motor, a hub attached to the motor, and a plurality of blades provided around the hub, an orifice surrounding an outer periphery of the discharge side of the blade, and A blower comprising a substantially cylindrical ring positioned on the discharge side of the blade and having one of the suction sides fixed to the suction side from the discharge portion of the blade.