WO2020050059A1 - Blower - Google Patents
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- WO2020050059A1 WO2020050059A1 PCT/JP2019/033001 JP2019033001W WO2020050059A1 WO 2020050059 A1 WO2020050059 A1 WO 2020050059A1 JP 2019033001 W JP2019033001 W JP 2019033001W WO 2020050059 A1 WO2020050059 A1 WO 2020050059A1
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- fan
- shroud
- air flow
- axis
- flow direction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
Definitions
- the present disclosure relates to a blower.
- a heat exchanger such as a condenser or a radiator for exchanging heat with the air introduced from the grill opening, and a blower for blowing air to the heat exchanger.
- a blower includes a fan that generates an airflow by rotating, a motor for rotating the fan, and a shroud provided to cover the outer periphery of the fan.
- the fan includes a plurality of blades arranged radially, and an annular fan ring connecting the tips of the blades.
- the shroud has a cylindrical portion provided to cover the outer periphery of the fan, and a guide portion provided at one end of the cylindrical portion on the upstream side in the air flow direction.
- the guide part is a part that guides the air flow generated by the fan.
- a gap is formed between the fan ring and the inner peripheral surface of the shroud.
- an annular protrusion is provided on the inner wall surface of one end of the cylindrical portion of the shroud on the upstream side in the air flow direction so as to protrude inward.
- the protrusion blocks the airflow in the opposite direction, thereby suppressing the generation of noise.
- the length of the guide portion is not uniform. Specifically, while the length of the guide portion is longer in the longitudinal direction of the shroud, the length of the guide portion is shorter in the shorter direction. In a portion where the length of the guide portion is long, it is possible to form an airflow that flows smoothly along the protrusion by flowing air along the guide portion. However, in a portion where the length of the guide portion is short, it is difficult to form an airflow that flows smoothly along the protrusion. In such a portion, the protruding portion becomes an obstacle to the main flow of air, so that an air flow flowing in a direction opposite to the main flow of air is formed along the protruding portion, and air stagnation may occur. Confirmed by the inventor. Such stagnation of air causes inflow loss, and as a result, there is a possibility that the air volume of the blower may be adversely affected.
- An object of the present disclosure is to provide a blower capable of improving an air inflow loss.
- a blower includes a fan and a shroud.
- the fan has a plurality of blades provided radially around a predetermined axis, and an annular fan ring connecting respective tips of the plurality of blades, and rotates the air around the axis to generate an air flow.
- the shroud has a predetermined gap between the fan ring and a cylindrical portion disposed so as to cover the outer periphery of the fan, and extends from the outer periphery of one end of the cylindrical portion radially outward around the axis.
- the guide portion has a guide portion formed to guide the air flow generated by the rotation of the fan, and an annular protrusion formed to protrude from the inner peripheral surface of one end of the cylindrical portion.
- the guide portion has a longitudinal portion in which a distance from the radially outer edge around the axis to the fan ring is set to a predetermined distance, and a distance from the radially outer edge to the fan ring around the axis in the predetermined distance. And a shorter part than the short part.
- the protruding portion When a portion provided at a position corresponding to the long portion in the protruding portion is a first portion, and a portion provided at a position corresponding to the short portion in the protruding portion is a second portion, the protruding portion is in a flow direction of the air flow. Is formed such that the length of the second portion along the flow direction of the airflow is longer than the length of the first portion along.
- the second portion of the protrusion provided at the position corresponding to the short portion of the guide portion is longer than the first portion of the protrusion provided at the position corresponding to the long portion of the guide portion.
- an airflow that flows along the protrusion is easily generated. This makes it difficult for the protruding portion to become an obstacle to the main flow of air generated by the fan 70, so that it is difficult to generate an airflow flowing in a direction opposite to the flow direction of the main flow of air. As a result, the retention of air is less likely to occur, so that the inflow loss can be improved.
- FIG. 1 is a diagram schematically illustrating a schematic configuration of a vehicle.
- FIG. 2 is a front view illustrating a front structure of the blower according to the embodiment.
- FIG. 3 is a front view illustrating a front structure of the fan according to the embodiment.
- FIG. 4 is a perspective view showing one perspective structure when the shroud of the embodiment is divided into two parts.
- FIG. 5 is a front view schematically illustrating a schematic configuration of the blower according to the embodiment.
- FIG. 6 is a cross-sectional view showing a cross-sectional structure taken along the line VI-VI of FIG. 5 and a flow of air around the cross-sectional structure.
- FIG. 1 is a diagram schematically illustrating a schematic configuration of a vehicle.
- FIG. 2 is a front view illustrating a front structure of the blower according to the embodiment.
- FIG. 3 is a front view illustrating a front structure of the fan according to the embodiment.
- FIG. 4 is a perspective view showing one perspective
- FIG. 7 is a cross-sectional view showing the cross-sectional structure around the short portion of the shroud of the reference example and the flow of air around it.
- FIG. 8 is a diagram schematically showing a cross-sectional structure along the line VIII-VIII in FIG.
- FIG. 9 is a graph showing the relationship between the rotational position ⁇ shown in FIG. 5 and the length L of the protruding portion of the shroud.
- a grill opening 2 is provided in front of the body 1 of the vehicle C shown in FIG.
- Grill opening 2 is a portion for introducing air in front of vehicle body 1 into engine room 3.
- the air introduced into the engine room 3 from the grill opening 2 flows in the direction indicated by the arrow Y in the drawing.
- a condenser 5, a radiator 6, and a blower 7 are arranged in the engine room 3.
- the condenser 5, the radiator 6, and the blower 7 are arranged in this order in the direction from the grill opening 2 to the engine 4.
- the condenser 5 is one element constituting a refrigeration cycle of an air conditioner mounted on the vehicle C, and performs heat exchange between a refrigerant circulating in the refrigeration cycle and air introduced from the grill opening 2. Dissipates the refrigerant.
- the radiator 6 radiates cooling water by exchanging heat between cooling water for cooling the engine 4 and air introduced from the grill opening 2.
- the blower 7 blows air introduced from the grill opening 2 to the condenser 5 and the radiator 6.
- the blower 7 includes a fan 70, a motor 71, a stay 72, and a shroud 73.
- the three axis directions orthogonal to each other are represented by a direction indicated by an arrow X, a direction indicated by an arrow Y, and a direction indicated by an arrow Z, respectively.
- the direction indicated by the arrow Y is the flow direction of the airflow introduced from the grill opening 2 as described above.
- the direction indicated by arrow Z is the vertical direction.
- the direction indicated by arrow X is a direction orthogonal to both the direction indicated by arrow Y and the direction indicated by arrow Z.
- the fan 70 is an axial-flow fan that rotates around the axis m1.
- the fan 70 has a plurality of blades 700 and a fan ring 701.
- the plurality of blades 700 are provided to extend radially from the center of the fan 70.
- the fan ring 701 is formed of an annular member that connects the tips of the blades 700 to each other.
- a motor 71 is attached to the center of the fan 70.
- the motor 71 rotates the fan 70 about the axis m1 by applying torque to the fan 70 based on the supply of electric power.
- the blower 7 is a so-called suction type blower that forms an airflow in a direction indicated by an arrow Y, that is, an airflow in a direction from the condenser 5 and the radiator 6 to the blower 7 by the rotation of the fan 70.
- a plurality of stays 72 extending radially around the axis m1 are mounted on the outer peripheral portion of the motor 71.
- the stay 72 is disposed upstream of the fan 70 in the airflow direction Y.
- the tip of each stay 72 is fixed to a shroud 73.
- Each stay 72 supports a fan 70 and a motor 71.
- the shroud 73 is arranged on the outer periphery of the fan 70.
- the shroud 73 is formed of a resin material or the like.
- the shroud 73 has a cylindrical portion 730, a guide portion 731 and a projecting portion 732.
- the cylindrical portion 730 is formed in a cylindrical shape around the axis m1.
- the cylindrical portion 730 is disposed so as to cover the periphery of the fan 70 with a predetermined gap between the cylindrical portion 730 and the fan ring 701.
- the guide portion 731 is formed to extend radially outward from the outer circumference of one end of the cylindrical portion 730 on the upstream side in the air flow direction Y, with the axis m1 as the center.
- the guide portion 731 has a function of guiding an air flow generated by the rotation of the fan 70.
- the guide portion 731 is formed so that the cross-sectional shape orthogonal to the flow direction Y of the air flow is rectangular and the thickness in the flow direction Y of the air flow is thin. That is, the shroud 73 is formed in a flat shape. As shown in FIG.
- a bent portion 733 is formed on the outer edge 731a of the guide portion 731 so as to be bent toward the upstream side in the flow direction Y of the air flow.
- the shroud 73 is fixed to the radiator 6 by attaching the distal end of the bent portion 733 to the radiator 6 shown in FIG.
- an airflow having a flow direction opposite to the direction indicated by the arrow Y is formed in a gap formed between the fan ring 701 and the cylindrical portion 730.
- the inner peripheral surface at one end of the cylindrical portion 730 on the upstream side in the airflow direction Y may protrude inward.
- a protruding portion 732 is formed at the bottom. The protruding portion 732 is formed in an annular shape along the inner peripheral surface of one end of the cylindrical portion 730.
- the guide portion 731 has a longitudinal portion in which the distance from the outer edge 731a to the fan ring 701 is set to the first predetermined distance L11. 734 and a short portion 735 in which the distance from the outer edge 731a to the fan ring 701 is set to a second predetermined distance L12 shorter than the first predetermined distance L11.
- the length of the guide portion 731 is sufficiently ensured, so that the main flow of the air flows along the long portion 734 as indicated by the arrow A ⁇ b> 1. Flows smoothly. Since the main flow of the air flowing along the longitudinal portion 734 flows along the protrusion 732 as it is, the protrusion 732 hardly becomes an obstacle to the main flow of the air.
- the length of the guide portion 731 cannot be secured.
- the reference example shown in FIG. 7 illustrates a structure in which the length of the guide portion 731 cannot be secured in the short portion 735 and the cylindrical portion 730 and the bent portion 733 are continuous.
- the protruding portion 732 becomes an obstacle to the main flow of the air flowing in the direction shown by the arrow Y, as shown by the arrow A2 in FIG. It has been confirmed by the inventor that an airflow in the opposite direction is formed, and air retention occurs. Such stagnation of air causes an inflow loss, and as a result, the air volume of the blower 7 may be reduced.
- the first portion provided at a position corresponding to the long portion 734 of the shroud 73 at the protrusion 732 and the first portion provided at a position corresponding to the short portion 735 of the shroud 73 at the protrusion 732.
- the length of the protruding portion 732 is changed between the second portion and the second portion.
- the length along the flow direction Y of the air flow is “ L21 ".
- the length L21 is a length from the base end B11 to the front end T11 of the first portion 732a in the flow direction Y of the airflow.
- the position of the base end portion B11 of the first portion 732a in the flow direction Y of the airflow is indicated by “Y11”, and the position of the distal end portion T11 is indicated by “Y12”.
- the position Y21 of the base end B12 is the same as that of the first portion 732a. It is shifted to the upstream side in the flow direction Y of the air flow from the position Y11 of the base end B11.
- the position of the tip T12 of the second portion 732b is set to “Y12”, that is, the same position as the tip T11 of the first portion 732a. Accordingly, the length L22 of the second portion 732b along the flow direction Y of the airflow is longer than the length L21 of the first portion 732a.
- the protruding portion 732 is formed such that the length along the flow direction Y of the air flow gradually increases from the first portion 732a to the second portion 732b. Specifically, as shown in FIG. 5, when a position in the rotation direction about the axis m1 is represented by “ ⁇ ”, the long part 734 is located at the rotation position ⁇ 1, and the short part 735 is located at the rotation position. It is assumed that it is located at ⁇ 2. At this time, the first portion 732a of the protrusion 732 is located at the rotation position ⁇ 1, and the second portion 732b of the protrusion 732 is located at the rotation position ⁇ 2.
- the length of the protruding portion 732 is set as shown in FIG. That is, assuming that an intermediate position between the rotational position ⁇ 1 and the rotational position ⁇ 2 is “ ⁇ 3”, the length L of the protrusion 732 is set to a constant value L21 in the section from the rotational position ⁇ 1 to the rotational position ⁇ 3. I have.
- the length L of the protruding portion 732 is formed so as to gradually increase from “L21” to “L22” in the section from the rotation position ⁇ 3 to the rotation position ⁇ 2.
- the second portion 732b of the protrusion 732 provided at a position corresponding to the short portion 735 of the guide portion 731 is the first portion 732a of the protrusion 732 provided at a position corresponding to the long portion 734 of the guide portion 731.
- an air flow is generated at the second portion 732b of the protrusion 732 along the protrusion 732 in the direction indicated by the arrow Y, as indicated by an arrow A3 in FIG. It will be easier.
- the length of the protruding portion 732 in the direction along the flow direction Y of the air flow is from the intermediate portion between the first portion 732a and the second portion 732b toward the second portion 732b. It is formed so that it becomes longer gradually. Accordingly, since the shape of the protrusion 732 can be smoothly changed, the flow of the air generated by the fan 70 is less likely to be hindered by the protrusion 732 while changing the length of the protrusion 732. As a result, the turbulence of the air flow hardly occurs, so that the noise can be reduced.
- the stay 72 is disposed upstream of the fan 70 in the airflow direction Y. According to such a configuration, since the shroud 73 and the stay 72 can be integrally molded by a mold, the manufacture of the blower 7 becomes easy.
- the shroud 73 has a rectangular cross section orthogonal to the flow direction Y of the air flow, and is formed in a flat shape. In such a flat shroud 73, since the guide portion 731 is provided with the long portion 734 and the short portion 735, it is particularly preferable to adopt a structure like the protruding portion 732 of the present embodiment. It is valid.
- the shroud 73 of the above embodiment has a shape in which the guide portion 731 does not substantially exist in the short portion 735, but the guide portion 731 shorter than the long portion 734 is provided in the short portion 735. It may have a different shape.
- the protruding portion 732 may be formed so that the length of the air flow in the direction along the flow direction Y gradually increases from the first portion 732a toward the second portion 732b.
- the stay 72 may be arrange
- the present disclosure is not limited to the above specific examples.
- the above-described specific examples in which a person skilled in the art appropriately changes the design are also included in the scope of the present disclosure as long as they have the features of the present disclosure.
- the components included in each of the specific examples described above, and their arrangement, conditions, shapes, and the like are not limited to those illustrated, but can be appropriately changed.
- the elements included in each of the specific examples described above can be appropriately changed in combination as long as no technical inconsistency occurs.
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Abstract
A blower (7) is provided with a fan (70) and a shroud (73). The fan has a plurality of blades (700), and an annular fan ring coupling distal end sections of each of the plurality of blades. The shroud (73) has a cylindrical part (730), a guide part (731), and a projecting part (732). The guide part of the shroud has a longitudinal section (734) where the distance from an outer margin to the fan ring is set to a predetermined distance, and a transverse section (735) where the distance from the outer margin to the fan ring is shorter than the predetermined distance. The projecting part is formed so that the length of a second site is greater than the length of a first site, where the first site is a site provided to a location corresponding to the longitudinal part in the projecting part, and the second site is a site provided to a location corresponding to the transverse part in the projecting part.
Description
本出願は、2018年9月5日に出願された日本国特許出願2018-166197号に基づくものであって、その優先権の利益を主張するものであり、その特許出願の全ての内容が、参照により本明細書に組み込まれる。
This application is based on Japanese Patent Application No. 2018-166197 filed on Sep. 5, 2018, and claims the benefit of its priority. Incorporated herein by reference.
本開示は、送風機に関する。
The present disclosure relates to a blower.
車両のエンジンルーム内には、グリル開口部から導入される空気と熱交換を行うコンデンサやラジエータ等の熱交換器と、熱交換器に空気を送風するための送風機とが設けられている。このような送風機は、回転することにより空気流を生成するファンと、ファンを回転させるためのモータと、ファンの外周を覆うように設けられるシュラウドとを備えている。ファンは、放射状に配置される複数のブレードと、各ブレードの先端部を連結する円環状のファンリングとを備えている。シュラウドは、ファンの外周を覆うように設けられる円筒部と、円筒部の空気流れ方向上流側の一端部に設けられるガイド部とを有している。ガイド部は、ファンにより生成される空気流をガイドする部分である。ファンリングとシュラウドの内周面との間には隙間が形成されている。これにより、ファンリングとシュラウドとが干渉しないようになっている。
熱 In the engine room of the vehicle, there are provided a heat exchanger such as a condenser or a radiator for exchanging heat with the air introduced from the grill opening, and a blower for blowing air to the heat exchanger. Such a blower includes a fan that generates an airflow by rotating, a motor for rotating the fan, and a shroud provided to cover the outer periphery of the fan. The fan includes a plurality of blades arranged radially, and an annular fan ring connecting the tips of the blades. The shroud has a cylindrical portion provided to cover the outer periphery of the fan, and a guide portion provided at one end of the cylindrical portion on the upstream side in the air flow direction. The guide part is a part that guides the air flow generated by the fan. A gap is formed between the fan ring and the inner peripheral surface of the shroud. Thus, the fan ring and the shroud do not interfere with each other.
このような送風機では、ファンが回転した際に、ファンリングとシュラウドとの間に形成される隙間に、ファンの回転により生成される空気の主流の流れ方向とは逆方向の流れ方向を有する空気流が発生する。この逆方向の空気流が、ファンの回転により生成される空気の主流と衝突すると、空気流に乱れが生じる。このようにして空気流に乱れが生じると、送風機から騒音が発せられる可能性がある。
In such a blower, when the fan rotates, the air having a flow direction opposite to the flow direction of the main flow of air generated by the rotation of the fan is provided in a gap formed between the fan ring and the shroud. Flow occurs. When the airflow in the opposite direction collides with the main airflow generated by the rotation of the fan, the airflow is disturbed. When the air flow is disturbed in this manner, noise may be generated from the blower.
そこで、下記の特許文献1に記載の送風機では、シュラウドの円筒部における空気流れ方向上流側の一端部の内壁面に、内側に向かって突出するように円環状の突出部が設けられている。この突出部が上記の逆方向の空気流を遮断することにより、騒音の発生が抑制されている。
Therefore, in the blower described in Patent Literature 1 below, an annular protrusion is provided on the inner wall surface of one end of the cylindrical portion of the shroud on the upstream side in the air flow direction so as to protrude inward. The protrusion blocks the airflow in the opposite direction, thereby suppressing the generation of noise.
近年、ハイブリッド車両やターボエンジン車両では、従来のエンジンのみの車両に対して、補機部品が増大している。その一方で、居住性の向上のために車室内のスペースは維持又は拡大の傾向である。また、衝突安全性の確保のために、車両前方に余剰スペースを設けることも行われている。これらの複合的な要因により、エンジンルームにおける部品の搭載スペースは縮小傾向であるため、エンジンルーム内への部品の搭載が非常に困難になってきている。そのため、エンジンルームに搭載される送風機に関しても、その厚さを薄くしたり、アスペクト比を大きくしたりする等、シュラウドの形状に関する制限が厳しくなってきている。このような要求を満たすために、近年、上記の送風機のシュラウドとして、アスペクト比が大きく、且つ薄い形状からなる扁平状のシュラウドが用いられることがある。
In recent years, in hybrid vehicles and turbo engine vehicles, the number of accessory parts has increased compared to conventional vehicles using only engines. On the other hand, the space in the vehicle compartment tends to be maintained or expanded in order to improve comfort. Further, in order to ensure collision safety, an extra space is provided in front of the vehicle. Due to these combined factors, the mounting space for parts in the engine room is shrinking, and mounting parts in the engine room has become extremely difficult. For this reason, with respect to the blower mounted in the engine room, restrictions on the shape of the shroud are becoming severer, such as reducing the thickness and increasing the aspect ratio. In order to satisfy such a demand, in recent years, a flat shroud having a large aspect ratio and a thin shape is sometimes used as the shroud of the blower.
ところで、扁平状のシュラウドを用いた場合、ガイド部の長さが一様でなくなる。具体的には、シュラウドの長手方向ではガイド部の長さが長くなる一方、その短手方向ではガイド部の長さが短くなる。ガイド部の長さが長い部分では、ガイド部に沿って空気が流れることにより、突出部に沿って滑らかに流れるような空気流を形成することが可能である。しかしながら、ガイド部の長さが短い部分では、突出部に沿って滑らかに流れるような空気流を形成することが難しくなる。このような部分では、空気の主流に対して突出部が障害物になることにより、空気の主流とは逆方向に流れる空気流が突出部に沿って形成され、空気の滞留が発生することが発明者により確認されている。このような空気の滞留は流入損失の要因となるため、結果的に送風機の風量の減少等の悪影響を招くおそれがある。
By the way, when a flat shroud is used, the length of the guide portion is not uniform. Specifically, while the length of the guide portion is longer in the longitudinal direction of the shroud, the length of the guide portion is shorter in the shorter direction. In a portion where the length of the guide portion is long, it is possible to form an airflow that flows smoothly along the protrusion by flowing air along the guide portion. However, in a portion where the length of the guide portion is short, it is difficult to form an airflow that flows smoothly along the protrusion. In such a portion, the protruding portion becomes an obstacle to the main flow of air, so that an air flow flowing in a direction opposite to the main flow of air is formed along the protruding portion, and air stagnation may occur. Confirmed by the inventor. Such stagnation of air causes inflow loss, and as a result, there is a possibility that the air volume of the blower may be adversely affected.
本開示の目的は、空気の流入損失を改善することの可能な送風機を提供することにある。
目的 An object of the present disclosure is to provide a blower capable of improving an air inflow loss.
本開示の一態様による送風機は、ファンと、シュラウドと、を備える。ファンは、所定の軸線を中心に放射状に設けられる複数のブレードと、複数のブレードのそれぞれの先端部を連結する円環状のファンリングとを有し、軸線を中心に回転することにより空気流を生成する。シュラウドは、ファンリングとの間に所定の隙間を有してファンの外周を覆うように配置される円筒部と、円筒部の一端部の外周から軸線を中心とする径方向外側に広がるように形成されてファンの回転により生成される空気流をガイドするガイド部と、円筒部の一端部の内周面から突出するように形成される円環状の突出部とを有する。ガイド部は、軸線を中心とする径方向外側の外縁からファンリングまでの距離が所定距離に設定された長手部と、軸線を中心とする径方向外側の外縁からファンリングまでの距離が所定距離よりも短い短手部と、を有する。突出部において長手部に対応する位置に設けられる部位を第1部位とし、突出部において短手部に対応する位置に設けられる部位を第2部位とするとき、突出部は、空気流の流れ方向に沿った第1部位の長さよりも、空気流の流れ方向に沿った第2部位の長さの方が長くなるように形成されている。
送 A blower according to an aspect of the present disclosure includes a fan and a shroud. The fan has a plurality of blades provided radially around a predetermined axis, and an annular fan ring connecting respective tips of the plurality of blades, and rotates the air around the axis to generate an air flow. Generate. The shroud has a predetermined gap between the fan ring and a cylindrical portion disposed so as to cover the outer periphery of the fan, and extends from the outer periphery of one end of the cylindrical portion radially outward around the axis. It has a guide portion formed to guide the air flow generated by the rotation of the fan, and an annular protrusion formed to protrude from the inner peripheral surface of one end of the cylindrical portion. The guide portion has a longitudinal portion in which a distance from the radially outer edge around the axis to the fan ring is set to a predetermined distance, and a distance from the radially outer edge to the fan ring around the axis in the predetermined distance. And a shorter part than the short part. When a portion provided at a position corresponding to the long portion in the protruding portion is a first portion, and a portion provided at a position corresponding to the short portion in the protruding portion is a second portion, the protruding portion is in a flow direction of the air flow. Is formed such that the length of the second portion along the flow direction of the airflow is longer than the length of the first portion along.
この構成によれば、ガイド部の短手部に対応する位置に設けられる突出部の第2部位が、ガイド部の長手部に対応する位置に設けられる突出部の第1部位よりも長いため、突出部の第2部位では、突出部に沿って流れるような空気流が生成され易くなる。これにより、ファン70により生成される空気の主流に対して突出部が障害物になり難くなるため、空気の主流の流れ方向とは逆方向に流れる空気流が生成され難くなる。結果的に、空気の滞留が発生し難くなるため、流入損失を改善することができる。
According to this configuration, the second portion of the protrusion provided at the position corresponding to the short portion of the guide portion is longer than the first portion of the protrusion provided at the position corresponding to the long portion of the guide portion. At the second portion of the protrusion, an airflow that flows along the protrusion is easily generated. This makes it difficult for the protruding portion to become an obstacle to the main flow of air generated by the fan 70, so that it is difficult to generate an airflow flowing in a direction opposite to the flow direction of the main flow of air. As a result, the retention of air is less likely to occur, so that the inflow loss can be improved.
以下、送風機の一実施形態について図面を参照しながら説明する。説明の理解を容易にするため、各図面において同一の構成要素に対しては可能な限り同一の符号を付して、重複する説明は省略する。
はじめに、本実施形態の送風機が搭載される車両の概略構成について説明する。 Hereinafter, an embodiment of a blower will be described with reference to the drawings. To facilitate understanding of the description, the same components are denoted by the same reference numerals as much as possible in each drawing, and redundant description will be omitted.
First, a schematic configuration of a vehicle on which the blower of the present embodiment is mounted will be described.
はじめに、本実施形態の送風機が搭載される車両の概略構成について説明する。 Hereinafter, an embodiment of a blower will be described with reference to the drawings. To facilitate understanding of the description, the same components are denoted by the same reference numerals as much as possible in each drawing, and redundant description will be omitted.
First, a schematic configuration of a vehicle on which the blower of the present embodiment is mounted will be described.
図1に示される車両Cのボディ1の前方には、グリル開口部2が設けられている。グリル開口部2は、車両ボディ1の前方の空気をエンジンルーム3内に導入する部分である。グリル開口部2からエンジンルーム3内に導入される空気は、図中の矢印Yで示される方向に流れる。エンジンルーム3には、エンジン4の他、コンデンサ5、ラジエータ6、及び送風機7が配置されている。コンデンサ5、ラジエータ6、及び送風機7は、この順で、グリル開口部2からエンジン4に向かう方向に並べて配置されている。
グ リ ル A grill opening 2 is provided in front of the body 1 of the vehicle C shown in FIG. Grill opening 2 is a portion for introducing air in front of vehicle body 1 into engine room 3. The air introduced into the engine room 3 from the grill opening 2 flows in the direction indicated by the arrow Y in the drawing. In the engine room 3, in addition to the engine 4, a condenser 5, a radiator 6, and a blower 7 are arranged. The condenser 5, the radiator 6, and the blower 7 are arranged in this order in the direction from the grill opening 2 to the engine 4.
コンデンサ5は、車両Cに搭載される空調装置の冷凍サイクルを構成する一要素であって、冷凍サイクル内を循環する冷媒と、グリル開口部2から導入される空気とを熱交換させることにより、冷媒の放熱を行う。ラジエータ6は、エンジン4を冷却する冷却水と、グリル開口部2から導入される空気とを熱交換させることにより、冷却水の放熱を行う。送風機7は、グリル開口部2から導入される空気をコンデンサ5及びラジエータ6に送風する。
The condenser 5 is one element constituting a refrigeration cycle of an air conditioner mounted on the vehicle C, and performs heat exchange between a refrigerant circulating in the refrigeration cycle and air introduced from the grill opening 2. Dissipates the refrigerant. The radiator 6 radiates cooling water by exchanging heat between cooling water for cooling the engine 4 and air introduced from the grill opening 2. The blower 7 blows air introduced from the grill opening 2 to the condenser 5 and the radiator 6.
次に、送風機7の具体的な構造について説明する。
図2に示されるように、送風機7は、ファン70と、モータ71と、ステー72と、シュラウド73とを備えている。
なお、以下では、互いに直交する3軸方向を、矢印Xで示される方向、矢印Yで示される方向、及び矢印Zで示される方向によりそれぞれ表す。本実施形態では、矢印Yで示される方向は、上述の通り、グリル開口部2から導入される空気流の流れ方向である。また、矢印Zで示される方向は鉛直方向である。矢印Xで示される方向は、矢印Yで示される方向、及び矢印Zで示される方向の両方に直交する方向である。 Next, a specific structure of theblower 7 will be described.
As shown in FIG. 2, theblower 7 includes a fan 70, a motor 71, a stay 72, and a shroud 73.
In the following, the three axis directions orthogonal to each other are represented by a direction indicated by an arrow X, a direction indicated by an arrow Y, and a direction indicated by an arrow Z, respectively. In the present embodiment, the direction indicated by the arrow Y is the flow direction of the airflow introduced from thegrill opening 2 as described above. The direction indicated by arrow Z is the vertical direction. The direction indicated by arrow X is a direction orthogonal to both the direction indicated by arrow Y and the direction indicated by arrow Z.
図2に示されるように、送風機7は、ファン70と、モータ71と、ステー72と、シュラウド73とを備えている。
なお、以下では、互いに直交する3軸方向を、矢印Xで示される方向、矢印Yで示される方向、及び矢印Zで示される方向によりそれぞれ表す。本実施形態では、矢印Yで示される方向は、上述の通り、グリル開口部2から導入される空気流の流れ方向である。また、矢印Zで示される方向は鉛直方向である。矢印Xで示される方向は、矢印Yで示される方向、及び矢印Zで示される方向の両方に直交する方向である。 Next, a specific structure of the
As shown in FIG. 2, the
In the following, the three axis directions orthogonal to each other are represented by a direction indicated by an arrow X, a direction indicated by an arrow Y, and a direction indicated by an arrow Z, respectively. In the present embodiment, the direction indicated by the arrow Y is the flow direction of the airflow introduced from the
図3に示されるように、ファン70は、軸線m1を中心に回転する軸流式のファンである。ファン70は、複数のブレード700と、ファンリング701とを有している。複数のブレード700は、ファン70の中央部から放射状に延びるように設けられている。ファンリング701は、各ブレード700の先端部を互いに連結する円環状の部材からなる。
フ ァ ン As shown in FIG. 3, the fan 70 is an axial-flow fan that rotates around the axis m1. The fan 70 has a plurality of blades 700 and a fan ring 701. The plurality of blades 700 are provided to extend radially from the center of the fan 70. The fan ring 701 is formed of an annular member that connects the tips of the blades 700 to each other.
図2に示されるように、ファン70の中央部には、モータ71が組み付けられている。モータ71は、電力の供給に基づきファン70にトルクを付与することにより、軸線m1を中心にファン70を回転させる。送風機7は、ファン70の回転により、矢印Yで示される方向の空気流、すなわちコンデンサ5及びラジエータ6から送風機7に向かう方向の空気流を形成する、いわゆる吸い込み式の送風機である。
モ ー タ As shown in FIG. 2, a motor 71 is attached to the center of the fan 70. The motor 71 rotates the fan 70 about the axis m1 by applying torque to the fan 70 based on the supply of electric power. The blower 7 is a so-called suction type blower that forms an airflow in a direction indicated by an arrow Y, that is, an airflow in a direction from the condenser 5 and the radiator 6 to the blower 7 by the rotation of the fan 70.
モータ71の外周部分には、軸線m1を中心に放射状に延びる複数のステー72が組み付けられている。ステー72は、ファン70に対して空気流の流れ方向Yの上流側に配置されている。各ステー72の先端部は、シュラウド73に固定されている。各ステー72はファン70及びモータ71を支持している。
複数 A plurality of stays 72 extending radially around the axis m1 are mounted on the outer peripheral portion of the motor 71. The stay 72 is disposed upstream of the fan 70 in the airflow direction Y. The tip of each stay 72 is fixed to a shroud 73. Each stay 72 supports a fan 70 and a motor 71.
シュラウド73は、ファン70の外周に配置されている。シュラウド73は、樹脂材料等により形成されている。図4に示されるように、シュラウド73は、円筒部730と、ガイド部731と、突出部732とを有している。
円筒部730は、軸線m1を中心に円筒状に形成されている。円筒部730は、ファンリング701との間に所定の隙間を有してファン70の周囲を覆うように配置されている。 Theshroud 73 is arranged on the outer periphery of the fan 70. The shroud 73 is formed of a resin material or the like. As shown in FIG. 4, the shroud 73 has a cylindrical portion 730, a guide portion 731 and a projecting portion 732.
Thecylindrical portion 730 is formed in a cylindrical shape around the axis m1. The cylindrical portion 730 is disposed so as to cover the periphery of the fan 70 with a predetermined gap between the cylindrical portion 730 and the fan ring 701.
円筒部730は、軸線m1を中心に円筒状に形成されている。円筒部730は、ファンリング701との間に所定の隙間を有してファン70の周囲を覆うように配置されている。 The
The
ガイド部731は、空気流の流れ方向Yの上流側における円筒部730の一端部の外周から軸線m1を中心とする径方向外側に広がるように形成されている。ガイド部731は、ファン70の回転により生成される空気流をガイドする機能を有している。図2に示されるように、ガイド部731は、空気流の流れ方向Yに直交する断面形状が長方形をなし、且つ空気流の流れ方向Yの厚さが薄くなるように形成されている。すなわち、シュラウド73は扁平状に形成されている。図4に示されるように、ガイド部731の外縁731aには、空気流の流れ方向Yの上流側に向かって折り曲げられるように屈曲部733が形成されている。この屈曲部733の先端部が、図1に示されるラジエータ6に取り付けられることにより、シュラウド73がラジエータ6に対して固定されている。
The guide portion 731 is formed to extend radially outward from the outer circumference of one end of the cylindrical portion 730 on the upstream side in the air flow direction Y, with the axis m1 as the center. The guide portion 731 has a function of guiding an air flow generated by the rotation of the fan 70. As shown in FIG. 2, the guide portion 731 is formed so that the cross-sectional shape orthogonal to the flow direction Y of the air flow is rectangular and the thickness in the flow direction Y of the air flow is thin. That is, the shroud 73 is formed in a flat shape. As shown in FIG. 4, a bent portion 733 is formed on the outer edge 731a of the guide portion 731 so as to be bent toward the upstream side in the flow direction Y of the air flow. The shroud 73 is fixed to the radiator 6 by attaching the distal end of the bent portion 733 to the radiator 6 shown in FIG.
この送風機7では、ファン70が回転した際に、ファンリング701と円筒部730との間に形成される隙間に、矢印Yで示される方向とは逆方向の流れ方向を有する空気流が形成される。この逆方向の空気流を遮断するために、図4に示されるように、空気流の流れ方向Yの上流側における円筒部730の一端部の内周面には、内側に向かって突出するように突出部732が形成されている。突出部732は、円筒部730の一端部の内周面に沿って円環状に形成されている。
In the blower 7, when the fan 70 rotates, an airflow having a flow direction opposite to the direction indicated by the arrow Y is formed in a gap formed between the fan ring 701 and the cylindrical portion 730. You. In order to cut off the airflow in the opposite direction, as shown in FIG. 4, the inner peripheral surface at one end of the cylindrical portion 730 on the upstream side in the airflow direction Y may protrude inward. A protruding portion 732 is formed at the bottom. The protruding portion 732 is formed in an annular shape along the inner peripheral surface of one end of the cylindrical portion 730.
なお、以下では、ファン70の回転により生成される矢印Yで示される方向に流れる空気流と、ファンリング701と円筒部730との間の隙間に形成される逆方向の空気流とを区別するために、前者の空気流を空気の主流と称する。
ところで、シュラウド73が扁平状に形成されている場合、図5に示されるように、ガイド部731には、外縁731aからファンリング701までの距離が第1の所定距離L11に設定された長手部734と、外縁731aからファンリング701までの距離が第1の所定距離L11よりも短い第2の所定距離L12に設定された短手部735とが存在する。なお、図5では、ファン70及びシュライド73のみが模式的に図示され、且つシュラウド73の突出部732の図示が省略されている。このような構造からなるシュラウド73では、短手部735においてガイド部731の長さを十分に確保することができない。そのため、この部分では、矢印Yで示される方向に流れる空気の主流に対して突出部732が障害物となることにより、空気の主流とは逆方向に流れる空気流が突出部732に沿って形成されることが発明者により確認されている。 In the following, an airflow generated in the direction indicated by arrow Y generated by the rotation offan 70 and an airflow in the opposite direction formed in the gap between fan ring 701 and cylindrical portion 730 are distinguished. For this reason, the former airflow is referred to as the main airflow.
By the way, when theshroud 73 is formed in a flat shape, as shown in FIG. 5, the guide portion 731 has a longitudinal portion in which the distance from the outer edge 731a to the fan ring 701 is set to the first predetermined distance L11. 734 and a short portion 735 in which the distance from the outer edge 731a to the fan ring 701 is set to a second predetermined distance L12 shorter than the first predetermined distance L11. In FIG. 5, only the fan 70 and the shride 73 are schematically illustrated, and the protrusion 732 of the shroud 73 is not illustrated. In the shroud 73 having such a structure, the length of the guide portion 731 in the short portion 735 cannot be sufficiently ensured. Therefore, in this portion, the protrusion 732 acts as an obstacle to the main flow of air flowing in the direction indicated by the arrow Y, so that an airflow flowing in the opposite direction to the main flow of air is formed along the protrusion 732. Has been confirmed by the inventor.
ところで、シュラウド73が扁平状に形成されている場合、図5に示されるように、ガイド部731には、外縁731aからファンリング701までの距離が第1の所定距離L11に設定された長手部734と、外縁731aからファンリング701までの距離が第1の所定距離L11よりも短い第2の所定距離L12に設定された短手部735とが存在する。なお、図5では、ファン70及びシュライド73のみが模式的に図示され、且つシュラウド73の突出部732の図示が省略されている。このような構造からなるシュラウド73では、短手部735においてガイド部731の長さを十分に確保することができない。そのため、この部分では、矢印Yで示される方向に流れる空気の主流に対して突出部732が障害物となることにより、空気の主流とは逆方向に流れる空気流が突出部732に沿って形成されることが発明者により確認されている。 In the following, an airflow generated in the direction indicated by arrow Y generated by the rotation of
By the way, when the
具体的には、図6に示されるように、長手部734では、ガイド部731の長さが十分に確保されているため、空気の主流が長手部734に沿って矢印A1で示されるように滑らかに流れる。この長手部734に沿って流れる空気の主流がそのまま突出部732に沿って流れるため、空気の主流に対して突出部732が障害物になり難い。
Specifically, as shown in FIG. 6, in the long portion 734, the length of the guide portion 731 is sufficiently ensured, so that the main flow of the air flows along the long portion 734 as indicated by the arrow A <b> 1. Flows smoothly. Since the main flow of the air flowing along the longitudinal portion 734 flows along the protrusion 732 as it is, the protrusion 732 hardly becomes an obstacle to the main flow of the air.
これに対し、図7に示されるように、短手部735では、ガイド部731の長さを確保することができない。なお、図7に示される参考例では、短手部735においてガイド部731の長さを確保できておらず、円筒部730と屈曲部733とが連続している構造について例示している。このようにガイド部731の長さを確保できていない短手部735では、ガイド部731に沿うような空気の流れを形成することができない。そのため、この部分では、矢印Yで示される方向に流れる空気の主流に対して突出部732が障害物になることにより、図7に矢印A2で示されるように、矢印Yで示される方向とは逆方向の空気流が形成され、空気の滞留が発生することが発明者により確認されている。このような空気の滞留は流入損失の要因となるため、結果的に送風機7の風量の減少等を招くおそれがある。
On the other hand, as shown in FIG. 7, in the short portion 735, the length of the guide portion 731 cannot be secured. Note that the reference example shown in FIG. 7 illustrates a structure in which the length of the guide portion 731 cannot be secured in the short portion 735 and the cylindrical portion 730 and the bent portion 733 are continuous. As described above, in the short portion 735 where the length of the guide portion 731 cannot be ensured, it is not possible to form an air flow along the guide portion 731. For this reason, in this portion, as the protruding portion 732 becomes an obstacle to the main flow of the air flowing in the direction shown by the arrow Y, as shown by the arrow A2 in FIG. It has been confirmed by the inventor that an airflow in the opposite direction is formed, and air retention occurs. Such stagnation of air causes an inflow loss, and as a result, the air volume of the blower 7 may be reduced.
そこで、本実施形態の送風機7では、突出部732においてシュラウド73の長手部734に対応する位置に設けられる第1部位と、突出部732においてシュラウド73の短手部735に対応する位置に設けられる第2部位とで、突出部732の長さを変化させるようにしている。
Therefore, in the blower 7 of the present embodiment, the first portion provided at a position corresponding to the long portion 734 of the shroud 73 at the protrusion 732 and the first portion provided at a position corresponding to the short portion 735 of the shroud 73 at the protrusion 732. The length of the protruding portion 732 is changed between the second portion and the second portion.
具体的には、図6に示されるように、突出部732においてシュラウド73の長手部734に対応する位置に設けられる第1部位732aでは、その空気流の流れ方向Yに沿った長さが「L21」に設定されている。長さL21は、空気流の流れ方向Yにおける第1部位732aの基端部B11から先端部T11までの長さである。なお、図6では、空気流の流れ方向Yにおける第1部位732aの基端部B11の位置を「Y11」で示し、その先端部T11の位置を「Y12」で示している。
Specifically, as shown in FIG. 6, in the first portion 732a provided at a position corresponding to the longitudinal portion 734 of the shroud 73 in the protruding portion 732, the length along the flow direction Y of the air flow is “ L21 ". The length L21 is a length from the base end B11 to the front end T11 of the first portion 732a in the flow direction Y of the airflow. In FIG. 6, the position of the base end portion B11 of the first portion 732a in the flow direction Y of the airflow is indicated by “Y11”, and the position of the distal end portion T11 is indicated by “Y12”.
これに対し、図8に示されるように、突出部732においてシュラウド73の短手部735に対応する位置に設けられる第2部位732bでは、その基端部B12の位置Y21が第1部位732aの基端部B11の位置Y11よりも空気流の流れ方向Yの上流側にずれている。第2部位732bの先端部T12の位置は「Y12」に、すなわち第1部位732aの先端部T11と同一の位置に設定されている。これにより、空気流の流れ方向Yに沿った第2部位732bの長さL22は、第1部位732aの長さL21よりも長くなっている。
On the other hand, as shown in FIG. 8, in the second portion 732b provided at a position corresponding to the short portion 735 of the shroud 73 in the protruding portion 732, the position Y21 of the base end B12 is the same as that of the first portion 732a. It is shifted to the upstream side in the flow direction Y of the air flow from the position Y11 of the base end B11. The position of the tip T12 of the second portion 732b is set to “Y12”, that is, the same position as the tip T11 of the first portion 732a. Accordingly, the length L22 of the second portion 732b along the flow direction Y of the airflow is longer than the length L21 of the first portion 732a.
また、突出部732は、その空気流の流れ方向Yに沿った長さが第1部位732aから第2部位732bに向かって徐々に長くなるように形成されている。具体的には、図5に示されるように、軸線m1を中心とする回転方向の位置を「θ」で表したとき、長手部734が回転位置θ1に位置し、短手部735が回転位置θ2に位置しているとする。このとき、突出部732の第1部位732aは回転位置θ1に位置し、突出部732の第2部位732bは回転位置θ2に位置することになる。このように突出部732の第1部位732a及び第2部位732bのそれぞれの位置を定義したとき、突出部732の長さは図9に示されるように設定されている。すなわち、回転位置θ1と回転位置θ2との間の中間の位置を「θ3」とすると、突出部732の長さLは、回転位置θ1から回転位置θ3までの区間では一定値L21に設定されている。また、突出部732の長さLは、回転位置θ3から回転位置θ2までの区間では、「L21」から「L22」に向かって徐々に長くなるように形成されている。
The protruding portion 732 is formed such that the length along the flow direction Y of the air flow gradually increases from the first portion 732a to the second portion 732b. Specifically, as shown in FIG. 5, when a position in the rotation direction about the axis m1 is represented by “θ”, the long part 734 is located at the rotation position θ1, and the short part 735 is located at the rotation position. It is assumed that it is located at θ2. At this time, the first portion 732a of the protrusion 732 is located at the rotation position θ1, and the second portion 732b of the protrusion 732 is located at the rotation position θ2. When the respective positions of the first portion 732a and the second portion 732b of the protruding portion 732 are defined in this way, the length of the protruding portion 732 is set as shown in FIG. That is, assuming that an intermediate position between the rotational position θ1 and the rotational position θ2 is “θ3”, the length L of the protrusion 732 is set to a constant value L21 in the section from the rotational position θ1 to the rotational position θ3. I have. The length L of the protruding portion 732 is formed so as to gradually increase from “L21” to “L22” in the section from the rotation position θ3 to the rotation position θ2.
以上説明した本実施形態の送風機7によれば、以下の(1)~(4)に示される作用及び効果を得ることができる。
(1)ガイド部731の短手部735に対応する位置に設けられる突出部732の第2部位732bが、ガイド部731の長手部734に対応する位置に設けられる突出部732の第1部位732aよりも長くなっているため、図8に矢印A3で示されるように、突出部732の第2部位732bでは、突出部732に沿って矢印Yで示される方向に流れるような空気流が生成され易くなる。これにより、矢印Yで示される方向に流れる空気の主流に対して突出部732が障害物になり難くなるため、図7に示されるような矢印Yで示される方向とは逆方向に流れるような空気流が生成され難くなる。結果的に、空気の滞留が発生し難くなるため、流入損失を改善することができる。また、空気流の乱れを抑制することも可能となるため、騒音を低減することもできる。 According to theblower 7 of the present embodiment described above, the following functions and effects (1) to (4) can be obtained.
(1) Thesecond portion 732b of the protrusion 732 provided at a position corresponding to the short portion 735 of the guide portion 731 is the first portion 732a of the protrusion 732 provided at a position corresponding to the long portion 734 of the guide portion 731. 8, an air flow is generated at the second portion 732b of the protrusion 732 along the protrusion 732 in the direction indicated by the arrow Y, as indicated by an arrow A3 in FIG. It will be easier. This makes it difficult for the protruding portion 732 to become an obstacle to the main flow of the air flowing in the direction indicated by the arrow Y, so that the air flows in the direction opposite to the direction indicated by the arrow Y as shown in FIG. Airflow is less likely to be generated. As a result, the retention of air is less likely to occur, so that the inflow loss can be improved. Further, since it is possible to suppress the turbulence of the air flow, it is possible to reduce noise.
(1)ガイド部731の短手部735に対応する位置に設けられる突出部732の第2部位732bが、ガイド部731の長手部734に対応する位置に設けられる突出部732の第1部位732aよりも長くなっているため、図8に矢印A3で示されるように、突出部732の第2部位732bでは、突出部732に沿って矢印Yで示される方向に流れるような空気流が生成され易くなる。これにより、矢印Yで示される方向に流れる空気の主流に対して突出部732が障害物になり難くなるため、図7に示されるような矢印Yで示される方向とは逆方向に流れるような空気流が生成され難くなる。結果的に、空気の滞留が発生し難くなるため、流入損失を改善することができる。また、空気流の乱れを抑制することも可能となるため、騒音を低減することもできる。 According to the
(1) The
(2)図9に示されるように、突出部732は、その空気流の流れ方向Yに沿った方向の長さが第1部位732aと第2部位732bの途中部分から第2部位732bに向かって徐々に長くなるように形成されている。これにより、突出部732の形状を滑らかに変化させることができるため、突出部732の長さを変化させつつも、ファン70により生成される空気の流れが突出部732により阻害され難くなる。結果的に、空気流の乱れが生じ難くなるため、騒音を低減することができる。
(2) As shown in FIG. 9, the length of the protruding portion 732 in the direction along the flow direction Y of the air flow is from the intermediate portion between the first portion 732a and the second portion 732b toward the second portion 732b. It is formed so that it becomes longer gradually. Accordingly, since the shape of the protrusion 732 can be smoothly changed, the flow of the air generated by the fan 70 is less likely to be hindered by the protrusion 732 while changing the length of the protrusion 732. As a result, the turbulence of the air flow hardly occurs, so that the noise can be reduced.
(3)ステー72がファン70に対して空気流の流れ方向Yの上流側に配置されている。このような構成によれば、金型によりシュラウド73及びステー72を一体成型することができるため、送風機7の製造が容易になる。
(4)シュラウド73は、空気流の流れ方向Yに直交する断面形状が長方形をなすとともに、扁平状に形成されている。このような扁平状のシュラウド73にあっては、ガイド部731に長手部734及び短手部735が設けられることになるため、本実施形態の突出部732のような構造を採用することは特に有効である。 (3) Thestay 72 is disposed upstream of the fan 70 in the airflow direction Y. According to such a configuration, since the shroud 73 and the stay 72 can be integrally molded by a mold, the manufacture of the blower 7 becomes easy.
(4) Theshroud 73 has a rectangular cross section orthogonal to the flow direction Y of the air flow, and is formed in a flat shape. In such a flat shroud 73, since the guide portion 731 is provided with the long portion 734 and the short portion 735, it is particularly preferable to adopt a structure like the protruding portion 732 of the present embodiment. It is valid.
(4)シュラウド73は、空気流の流れ方向Yに直交する断面形状が長方形をなすとともに、扁平状に形成されている。このような扁平状のシュラウド73にあっては、ガイド部731に長手部734及び短手部735が設けられることになるため、本実施形態の突出部732のような構造を採用することは特に有効である。 (3) The
(4) The
なお、上記実施形態は、以下の形態にて実施することもできる。
・上記実施形態のシュラウド73は、短手部735にガイド部731が実質的に存在しない形状を有するものであったが、長手部734よりも短いガイド部731が短手部735に設けられるような形状を有するものであってもよい。 Note that the above embodiment can also be implemented in the following forms.
Theshroud 73 of the above embodiment has a shape in which the guide portion 731 does not substantially exist in the short portion 735, but the guide portion 731 shorter than the long portion 734 is provided in the short portion 735. It may have a different shape.
・上記実施形態のシュラウド73は、短手部735にガイド部731が実質的に存在しない形状を有するものであったが、長手部734よりも短いガイド部731が短手部735に設けられるような形状を有するものであってもよい。 Note that the above embodiment can also be implemented in the following forms.
The
・突出部732は、その空気流の流れ方向Yに沿った方向の長さが第1部位732aから第2部位732bに向かって徐々に長くなるように形成されていてもよい。
・上記実施形態の送風機7では、ステー72がファン70に対して空気流の流れ方向Yの下流側に配置されていてもよい。 The protrudingportion 732 may be formed so that the length of the air flow in the direction along the flow direction Y gradually increases from the first portion 732a toward the second portion 732b.
-In theblower 7 of the said embodiment, the stay 72 may be arrange | positioned with respect to the fan 70 at the downstream of the flow direction Y of an airflow.
・上記実施形態の送風機7では、ステー72がファン70に対して空気流の流れ方向Yの下流側に配置されていてもよい。 The protruding
-In the
・本開示は上記の具体例に限定されるものではない。上記の具体例に、当業者が適宜設計変更を加えたものも、本開示の特徴を備えている限り、本開示の範囲に包含される。前述した各具体例が備える各要素、及びその配置、条件、形状等は、例示したものに限定されるわけではなく適宜変更することができる。前述した各具体例が備える各要素は、技術的な矛盾が生じない限り、適宜組み合わせを変えることができる。
The present disclosure is not limited to the above specific examples. The above-described specific examples in which a person skilled in the art appropriately changes the design are also included in the scope of the present disclosure as long as they have the features of the present disclosure. The components included in each of the specific examples described above, and their arrangement, conditions, shapes, and the like are not limited to those illustrated, but can be appropriately changed. The elements included in each of the specific examples described above can be appropriately changed in combination as long as no technical inconsistency occurs.
Claims (5)
- 所定の軸線を中心に放射状に設けられる複数のブレード(700)と、複数の前記ブレードのそれぞれの先端部を連結する円環状のファンリング(701)とを有し、前記軸線を中心に回転することにより空気流を生成するファン(70)と、
前記ファンリングとの間に所定の隙間を有して前記ファンの外周を覆うように配置される円筒部(730)と、前記円筒部の一端部の外周から前記軸線を中心とする径方向外側に広がるように形成されて前記ファンの回転により生成される空気流をガイドするガイド部(731)と、前記円筒部の一端部の内周面から突出するように形成される円環状の突出部(732)とを有するシュラウド(73)と、を備え、
前記ガイド部は、
前記軸線を中心とする径方向外側の外縁から前記ファンリングまでの距離が所定距離に設定された長手部(734)と、
前記軸線を中心とする径方向外側の外縁から前記ファンリングまでの距離が前記所定距離よりも短い短手部(735)と、を有し、
前記突出部において前記長手部に対応する位置に設けられる部位を第1部位(732a)とし、前記突出部において前記短手部に対応する位置に設けられる部位を第2部位(732b)とするとき、
前記突出部は、前記空気流の流れ方向に沿った前記第1部位の長さよりも、前記空気流の流れ方向に沿った前記第2部位の長さの方が長くなるように形成されている
送風機。 It has a plurality of blades (700) radially provided about a predetermined axis and an annular fan ring (701) connecting the tips of the plurality of blades, and rotates about the axis. A fan (70) for generating an airflow therefrom;
A cylindrical portion (730) arranged to cover the outer periphery of the fan with a predetermined gap between the fan ring and a radially outer portion centered on the axis from the outer periphery of one end of the cylindrical portion; A guide portion (731) formed so as to spread out and guide an air flow generated by rotation of the fan; and an annular projecting portion formed to project from an inner peripheral surface of one end of the cylindrical portion. (732) and a shroud (73) having
The guide section,
A longitudinal portion (734) in which a distance from a radially outer edge around the axis to the fan ring is set to a predetermined distance;
A short portion (735) in which a distance from a radially outer edge around the axis to the fan ring is shorter than the predetermined distance;
When a portion provided at a position corresponding to the long portion in the protruding portion is a first portion (732a), and a portion provided at a position corresponding to the short portion in the protruding portion is a second portion (732b). ,
The protrusion is formed such that a length of the second portion along the flow direction of the air flow is longer than a length of the first portion along the flow direction of the air flow. Blower. - 前記突出部は、前記空気流の流れ方向に沿った長さが前記第1部位から前記第2部位に向かって徐々に長くなるように形成されている
請求項1に記載の送風機。 2. The blower according to claim 1, wherein the protrusion is formed such that a length along a flow direction of the air flow gradually increases from the first portion toward the second portion. 3. - 前記突出部は、前記空気流の流れ方向に沿った長さが前記第1部位と前記第2部位との途中部分から前記第2部位に向かって徐々に長くなるように形成されている
請求項1に記載の送風機。 The projecting portion is formed so that a length along a flow direction of the air flow gradually increases from a middle portion between the first portion and the second portion toward the second portion. 2. The blower according to 1. - 前記ファンの中央部に設けられ、前記ファンにトルクを付与するモータ(71)と、
前記モータから前記軸線を中心とする径方向外側に放射状に延びるように形成されるとともに、先端部が前記シュラウドに固定され、前記ファン及び前記モータを支持するステー(72)と、を備え、
前記ステーは、前記ファンに対して前記空気流の流れ方向の上流側に配置されている
請求項1~3のいずれか一項に記載の送風機。 A motor (71) provided at a central portion of the fan and for applying torque to the fan;
A stay (72) formed so as to extend radially outward from the motor about the axis and having a tip fixed to the shroud and supporting the fan and the motor;
The blower according to any one of claims 1 to 3, wherein the stay is disposed upstream of the fan in a flow direction of the airflow. - 前記シュラウドは、前記空気流の流れ方向に直交する断面形状が長方形をなすとともに、扁平状に形成されている
請求項1~4のいずれか一項に記載の送風機。 The blower according to any one of claims 1 to 4, wherein the shroud has a rectangular cross section orthogonal to the flow direction of the air flow and has a flat shape.
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JP2010025026A (en) * | 2008-07-22 | 2010-02-04 | Mitsubishi Heavy Ind Ltd | Fan unit and vehicular cooling system using the same |
JP2015038338A (en) * | 2013-08-19 | 2015-02-26 | 株式会社日本自動車部品総合研究所 | Blower |
WO2017212893A1 (en) * | 2016-06-09 | 2017-12-14 | 株式会社デンソー | Blowing device |
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JP2010025026A (en) * | 2008-07-22 | 2010-02-04 | Mitsubishi Heavy Ind Ltd | Fan unit and vehicular cooling system using the same |
JP2015038338A (en) * | 2013-08-19 | 2015-02-26 | 株式会社日本自動車部品総合研究所 | Blower |
WO2017212893A1 (en) * | 2016-06-09 | 2017-12-14 | 株式会社デンソー | Blowing device |
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