JP2001263299A - Turning component correcting method of blowout air flow, and air blower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air blower using a propeller fan capable of forming straight airflow without constraint for arrangement. SOLUTION: In an air blower for blowing out airflow formed by rotation of the propeller fan 1 in a direction perpendicular to a rotary axial core of the propeller fan 1 on a nearly parallel surface toward a rotary surface of the propeller fan 1, turning component by rotation of the propeller fan 1 of the blowout airflow is corrected by an inclining wind direction plate 19 which is inclined according to the turning component on a side opposite to the rotational direction of the propeller fan 1, and thereby, straight injection flow is generated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a swirl of a blown air flow in a blower using a propeller fan which is installed at an open entrance of a building or the like and is mainly used for generating an air curtain for heat insulation inside and outside the building during cooling and heating. The present invention relates to a method for correcting a component and a blower suitable for generating an air curtain for heat insulation inside and outside a building mainly during cooling and heating.

[0002]

2. Description of the Related Art The formation of an air curtain, which is a flat airflow having a high flow velocity, has hitherto been mostly performed by a line crossflow fan. The line cross flow fan sucks air into the impeller in a radial direction from a part of the outer periphery of the impeller, and blows the air radially outward through the remaining outer periphery. That is, since the air completely flows through the impeller, the blade width can be increased irrespective of the diameter. However, the fan efficiency is as low as about 30%, the air volume is difficult to obtain, and the noise is high.

[0003] In order to solve such a problem, a blower suitable for forming an air curtain by a propeller fan having a high fan efficiency and an easy air volume has been developed. For example,
Japanese Patent Laid-Open Publication No. Hei 6-313603 discloses that an axial blower 33 is incorporated in a main body casing 32 having an inlet 30 at an upper portion and an outlet 31 at a lower portion as shown in FIG.
A blower is shown in which the main casing 32 is narrowed down. According to this blower, the jet width of the jet from the outlet 31 is not widened, and an air curtain with good blocking performance can be formed.

[0004] Japanese Patent Publication No. 6-35880 discloses that
A propeller fan rotated by a motor is provided in the duct casing. A blower provided with opposed disk-shaped air path members is shown. This blower has excellent aerodynamic characteristics such as good fan performance, high blow-out wind speed, large air volume, and low noise.

[0005]

SUMMARY OF THE INVENTION A blower employing the above-mentioned conventional propeller fan is disclosed in
Japanese Patent No. 3603 discloses that the suction port 30 and the air outlet 31 are arranged in a straight line, so that when the apparatus is installed in an opening of a building so as to form an air curtain, suction is performed from the ceiling surface of the installation location. The mouth 30 must be installed so that it is far enough apart, which places strong restrictions on the installation. On the other hand, Tokiko 6-
As disclosed in Japanese Patent No. 35880, since the blowout direction is in a plane substantially parallel to the rotation surface of the propeller fan with respect to the suction direction, even when applied as a blower for forming an air curtain, as described above. There are no restrictions on proper installation.

[0006] However, although it is a characteristic of the propeller fan, since the swirl component is included in the blown airflow, the airflow of FIG.
As shown in (2), even if a blower is attached to the upper part of the rectangular opening 34 in the front view of the building, the air curtain 35 having the full width of the frontage (horizontal width) cannot be formed. That is, the air curtain 35 is not formed vertically downward as shown in FIG. 10 because of the presence of the swirl component, and the air curtain 35 is shifted in the rotation direction of the propeller fan, resulting in a region where the shielding function does not work. There is a point. Further, when adjusting the angle of the blowing direction of the air curtain, the conventional blower has to rotate the entire body with respect to the mounting bracket or the like, and there is a problem that the blowing angle is difficult to adjust.

The present invention has been made to solve such a conventional problem, and its object is to solve the following problems:
The purpose is to apply and develop a propeller fan with high fan efficiency and excellent characteristics, and to develop a method to correct the swirling component of the blown airflow in a blower using a propeller fan. It is to obtain a blower that can form a straight airflow with less restrictions on installation by applying a propeller fan that has been installed, and to obtain a blower that uses a propeller fan that can easily adjust the blowing angle. It is an object of the present invention to obtain a propeller fan blower suitable for forming.

[0008]

In order to achieve the above object, an invention according to claim 1 is to provide an airflow formed by the rotation of the propeller fan in a direction substantially orthogonal to the rotation axis of the propeller fan. With respect to the blower that blows out on a plane substantially parallel to the propeller fan, the swirl component of the blown air flow due to the rotation of the propeller fan is guided by the wind direction plate to the opposite side to the direction of rotation of the propeller fan according to the swirl component. A means for correcting is adopted.

According to another aspect of the present invention, there is provided a propeller fan which is rotated in a wind tunnel by a motor to form an axial airflow in the wind tunnel, and which is connected to an outlet end of the wind tunnel to rotate the propeller fan. A scroll casing having an air outlet in a direction substantially orthogonal to the axis, and having a substantially semicircular cross-sectional shape in a direction substantially orthogonal to the rotation axis of the propeller fan on the opposite air outlet side; and a propeller provided in the scroll casing. A means having a disk-shaped air path member facing the fan at a predetermined interval and an inclined wind direction plate provided at the air outlet and inclined in a direction opposite to the rotation direction of the propeller fan is employed.

In order to achieve the above object, a third aspect of the present invention employs a means for setting the inclination of the inclined wind direction plate in the range of once to five degrees in the second aspect.

According to a fourth aspect of the present invention, the inclined wind direction plate in the means according to any one of the second and third aspects is further characterized in that a plane substantially perpendicular to a rotating surface of a propeller fan at an air outlet is provided. A plurality of rectifying plates are attached to the nozzle frame that is rotatably supported by the nozzle frame, and a plurality of rectifying plates that are interposed in the width direction at the air outlet are attached to the nozzle frame. Means for providing a hemispherical support structure for supporting the nozzle frame is employed.

In order to achieve the above object, an invention according to claim 5 is directed to the means according to any one of claims 2 to 4, which is orthogonal to the rotation axis of the propeller fan on the side of the scroll casing opposite to the outlet. Means for forming the portion into an R concave shape is employed.

According to a sixth aspect of the present invention, in order to achieve the above object, a plurality of the blowers according to any one of the second to fifth aspects are arranged in a line to form a blower row, and adjacent blowers are provided. Means for providing a partition member therebetween is employed.

In order to achieve the above object, a seventh aspect of the present invention adopts a means for holding a ventilation-enabled protective member provided on the suction side of the blower array by the partition member of the means according to the sixth aspect.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 1 and 2 show a blower 2 suitable for forming an air curtain using a propeller fan 1 having high fan efficiency.
It is about. The blower 2 applies an airflow formed by the rotation of the propeller fan 1 in a direction substantially orthogonal to the rotation axis of the propeller fan 1 incorporated in the main body casing 3 on a surface substantially parallel to the rotation surface of the propeller fan 1. It is configured to blow out. The main body casing 3 is formed as a substantially hexahedral box, the front face of which is opened as a suction port 4, the lower face near the back face is also opened with a rectangular downward opening covering substantially the entire width direction, and a mounting structure 5 is provided. The other upper surface including the back surface and both side surfaces are all closed. Body casing 3
Is provided with a suction grille 7 provided with a protective member 6 made of perforated metal or the like and capable of ventilation.

The propeller fan 1 is rotated by a motor 9 mounted on the back surface of the main body casing 3 in a bell mouth 8 which is a wind tunnel assembled from the suction port 4 to the rear side of the main body casing 3. Then, an axial airflow is formed in the bell mouth 8. The outlet end of the bell mouth 8 has an outlet 10 facing the opening on the lower surface of the main body casing 3 in a direction substantially orthogonal to the rotation axis of the propeller fan 1, and the rotation shaft of the propeller fan 1 on the side opposite to the outlet. A plastic scroll casing 11 having a substantially semicircular cross section in a direction substantially perpendicular to the center is connected. A portion perpendicular to the rotation axis of the propeller fan 1 on the side opposite to the outlet of the scroll casing 11 is formed into a smooth R concave surface 12 and smoothly continues to the rear surface of the main body casing 3. An air passage member 14 facing the propeller fan 1 within the scroll casing 11 at a predetermined interval is attached to a motor attachment member 13 to which the motor 9 is fixed. The air passage member 14 is formed in a disk shape having a size larger than the outer diameter of the propeller fan 1, separates from the back surface of the main body casing 3 so as to form a back space 15, and divides the outlet 10 into approximately two front and rear parts. It is in such a positional relationship as you do. A centrifugal diffuser air passage 16 is formed between the outer periphery of the air passage member 14 and the scroll casing 11.

A rectangular nozzle frame 1 is provided in the air outlet 10 so as to be rotatable in a plane substantially perpendicular to the plane of rotation of the propeller fan 1.
7 are supported at both ends by support pins 18 serving as rotation support portions, and the nozzle frame 17 is a substantial outlet for blowing out a jet. The inside of the nozzle frame 17 has a lattice structure with a plurality of inclined wind direction plates 19 and a plurality of rectifying plates 20 interposed in the width direction. A support structure 21 having a semi-spherical outer surface for slidingly supporting the contact nozzle frame 17 is provided. The support structure 21 is made of a soft material such as plastic, and has an appropriate sliding resistance to the edge of the outlet 10. A plurality of inclined wind direction plates 19 are provided at equal intervals (in the present embodiment, at an interval of 65 mm) in a direction substantially orthogonal to the rotation surface of the propeller fan 1, and are inclined in a direction opposite to the rotation direction of the propeller fan 1. (See FIG. 1). The inclination of the inclined wind direction plate 19 is determined in the range of 1 to 5 degrees according to the swirling component of the blown airflow due to the rotation of the propeller fan 1. In addition, the formation of an air curtain for a standard building having a height of 3.5 m is performed by using an inclined wind direction plate 1.
The inclination of 9 is preferably about 3 degrees. The current plate 20 is provided in parallel with a form that partitions the space from the rear end of the rotation surface of the propeller fan 1 to the air path member 14 at intervals of 10 mm in a direction substantially parallel to the rotation surface of the propeller fan 1.

In the blower 2, when the propeller fan 1 is rotated by the motor 9, air is sucked from the suction port 4, and the rotation of the propeller fan 1 causes the outlet of the bell mouth 8 to receive an axial force and a radial force. It is blown out from the end in the axial direction. The airflow blown out from the outlet end of the bell mouth 8 flows by changing the direction of 180 degrees from the axial direction to the radial direction by the wind path member 14 and the scroll casing 11, and the back face between the wind path member 14 and the back face of the main casing 3. Space 1
5 through the nozzle frame 17 of the outlet 10 as a jet.

The centrifugal diffuser 16 which converts the flow from the axial flow to the radial flow allows the flow direction to be adjusted to 90 while taking advantage of the characteristics of the propeller fan 1 (large air volume, low noise, high efficiency). By changing the degree, the static pressure can be increased as compared with the axial ventilation which is the flow of the conventional axial blower. The airflow that has flowed out of the centrifugal diffuser air passage 16 is directed to the outlet 10 along the smooth R concave surface 12 of the scroll casing 11 where the pressure loss is small, so that the loss of air flow is small. In addition, blade outer diameter φ210m
m, external dimensions of body casing 3 300 mm x 900 mm x
238 mm, opening area of outlet 10 900 mm x 85 m
m, the propeller fan 1 was rotated at 2200 r / m.
The air volume improved.

The inclined wind direction plate 19 at the outlet 10 has a function of correcting the swirl component contained in the blown airflow due to the rotation of the propeller fan 1 by the inclination thereof. This makes it possible to blow out a jet having a uniform wind speed on both the right and left sides without bending below the outlet 10. This method of correcting the swirl component can be realized by a simple means such as an inclined wind direction plate.
When an air curtain is used, there is no area in which the shielding function does not work at the opening of the building, which is suitable as a jet forming the air curtain. In addition, the rectifying plate 20 provided in such a form as to partition the space from the rear end of the rotating surface of the propeller fan 1 to the air path member 14 at intervals of 10 mm reduces vortices generated due to the speed difference at the outlet 10 and improves the blowing wind speed. Performs functions and prevents contact with movable parts such as fingers.
In addition, the measurement result by the presence or absence of the rectifier plate 20 by the above-mentioned prototype shows that the wind speed at a point 1 m away from the outlet 10 is improved by 20% as compared with the case without the rectifier plate 20 and the air curtain. It is suitable as the blowing device 2 to be formed.

The direction of the jet can be changed from the front side to the back side without operating the main body casing 3.
Can be easily performed by appropriately rotating. At this time, since the outer surface of the nozzle frame 17 is supported by the semi-spherical support structure 21 with an appropriate sliding resistance, the rotation is smooth and the nozzle frame 17 can be easily stopped at a desired position.

Embodiment 2 FIG. The present embodiment shown in FIGS. 3 to 8 relates to a blower in which a plurality of the blowers shown in the first embodiment are arranged in a row to form a blower row 22. The configuration of each blower is basically different. Is the same as that of the first embodiment. Therefore, the same portions as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and description thereof will be omitted.

The air blower of the present embodiment has a plurality of air blowers 2 shown in the first embodiment as shown in FIGS. 3 and 4 (three in the illustrated example) as air blowers for forming an air curtain. And (2) are arranged and connected to each other to form a blower array 22. Although the basic configuration of each blower 2 is the same as that of the first embodiment as shown in FIG. 5, there is no configuration of the boundary between the blowout ports 4 of the adjacent blowers 2 and the nozzle frame 17 As shown in FIG. 6 and FIG.
Are formed as a series of long objects over the air outlet 10. Several support structures 21 are provided at appropriate intervals in the longitudinal direction (see FIGS. 6 and 7).

The suction grill 7 is also configured so as to cover the whole at once, and a partition member 23 for partitioning between the adjacent blowers 2 is provided on the back surface thereof. This partition member 23
Functions to prevent interference between the blowers 2 due to suction, reduce the pressure loss of suction, and contribute to an increase in air volume. The measurement result of the prototype according to the first embodiment with and without the partition member 23 shows that the air volume is improved by 3% as compared with the case without the partition member 23. The ventilating protection member 6 on the front face of the suction grille 7 is disadvantageous for pressure loss related to suction, but is an indispensable part for preventing foreign matter from entering. In order to reduce the pressure loss as much as possible, the protection member 6 is made of a punched metal or the like having a high air permeability. However, when the protection member 6 is long, the rigidity is insufficient, and the design in the mounted state tends to be impaired. In order to solve this inconvenience, in the present embodiment, a device for holding the protection member 6 by the partition member 23 is employed. That is, FIG.
As shown in FIG. 7, the partition member 23 is provided with two opposing arm-shaped portions 25 having a convex portion 24 at the center, and the protective member 6 is pressed against the convex portion 24 of the arm-shaped portion 25 by pressing the protective member 6. To increase the rigidity. And the arm-shaped part 2
Since the variation in the shape of the suction grille 7 is absorbed by the elastic bending of 5, the assemblability is improved. Other functions are obtained by adding the functions of the first embodiment, and are basically the same as the blower 2 of the first embodiment except that the apparatus is more suitable for forming an air curtain.

[0025]

According to the first aspect of the present invention, the use of a propeller fan having high efficiency and excellent characteristics can be realized by a simple means such as an inclined wind direction plate, in which the swirling component accompanying the air blowing by the propeller fan can be corrected. Can be developed.

According to the second aspect of the present invention, there is provided a blower which can apply a propeller fan having high fan efficiency and excellent characteristics and which can form a straight air flow with less restrictions on installation.

According to the third aspect of the present invention, there is provided an air blower capable of forming an air curtain having an excellent shielding function as well as the above-mentioned effects of the second aspect.

According to the fourth aspect of the present invention, it is possible to easily adjust the blowing angle together with the effect according to the second or third aspect.

According to the fifth aspect of the present invention, it is possible to improve the air volume together with the effect according to any one of the second to fourth aspects.

According to the sixth aspect of the present invention, in addition to the effects according to any one of the second to fifth aspects, it is possible to obtain a blower having a large air volume suitable for forming an air curtain.

According to the seventh aspect of the present invention, it is possible to easily maintain the design property together with the effect according to the sixth aspect.

[Brief description of the drawings]

FIG. 1 is a front view of a blower according to a first embodiment.

FIG. 2 is a vertical side view of the blower of the first embodiment.

FIG. 3 is a front view of a blower according to a second embodiment.

FIG. 4 is a bottom view showing a blower of the second embodiment with a part thereof cut away.

FIG. 5 is an enlarged sectional view of a blower according to a second embodiment.

FIG. 6 is a front view of a nozzle frame of the blower according to the second embodiment.

FIG. 7 is a plan view of a nozzle frame of the blower according to the second embodiment.

FIG. 8 is a cross-sectional view illustrating a holding portion of a protection member of the blower according to the second embodiment.

FIG. 9 is a cross-sectional view of a conventional blower.

FIG. 10 is an explanatory view showing a form of forming a conventional air curtain.

[Explanation of symbols]

1 propeller fan, 2 blower, 4 suction port,
6 protection member, 7 suction grill, 8 bell mouth,
9 motor, 10 outlet, 11 scroll casing, 12R concave surface, 14 air path member, 1
7 nozzle frame, 19 inclined wind direction plate, 20 straightening plate,
DESCRIPTION OF SYMBOLS 21 Support structure, 22 Blower row, 23 Partition member, 24 Convex part, 25 Arm-shaped part.

Continued on the front page (72) Inventor Shinichiro Suzuki 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsui Electric Co., Ltd. (72) Inventor Hideaki Kashiwara 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsui Electric Co., Ltd. In-house (72) Inventor Koji Yamauchi 3-1, Tegano, Nakatsugawa-shi, Gifu F-term (reference) 3H034 AA02 BB02 BB08 BB20 CC03 DD07 DD12 DD26 EE12 EE15 3L081 AA02 AB06 BA05 BB03 DA02 HA08 HB06

Claims (7)

[Claims] An air blower configured to blow out an airflow formed by rotation of a propeller fan in a direction substantially orthogonal to a rotation axis of the propeller fan on a plane substantially parallel to a rotation surface of the propeller fan. A swirling component correction method for a blown airflow, in which a swirling component of the blown airflow due to the rotation of the propeller fan is guided by a wind direction plate and corrected by a direction corresponding to the swirling component in a direction opposite to the rotation direction of the propeller fan. 2. A propeller fan that is rotated in a wind tunnel by a motor and forms an axial airflow in the wind tunnel. The propeller fan is connected to an outlet end of the wind tunnel, and has an air outlet in a direction substantially orthogonal to a rotation axis of the propeller fan. A scroll casing having a substantially semicircular cross-sectional shape in a direction substantially perpendicular to the rotation axis of the propeller fan on the side opposite to the air outlet, provided in the scroll casing and facing the propeller fan at a predetermined interval. A blower provided with a disc-shaped air passage member, and an inclined wind direction plate provided at the air outlet and inclined in a direction opposite to a rotation direction of the propeller fan. 3. The blower according to claim 2, wherein the inclination of the inclined wind direction plate is set in a range from once to five degrees. 4. The blower according to claim 2, wherein the inclined wind direction plate is rotatably supported at the outlet at a plane substantially perpendicular to the rotation surface of the propeller fan. The nozzle frame is provided with a plurality of straightening plates interposed in the width direction at the outlet, and a hemispherical shape that supports the nozzle frame at the middle of the rotation support portion while hitting the edge of the outlet. Blower provided with support structure of 5. The blower according to claim 2, wherein a portion of the scroll casing orthogonal to the rotation axis of the propeller fan on the side opposite to the outlet of the scroll casing has an R-shaped concave shape. Blower. 6. A blower, wherein a plurality of blowers according to claim 2 are arranged in a row to form a blower row, and a partition member is provided between adjacent blowers. 7. The air blower according to claim 6, wherein a ventilation member provided on the suction side of the air blower array is held by a partition member.