JP2001304192A - Blower and use of the blower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such problems that an efficiency in a cross flow type fan is low, a space for suction is required in the case where an air-feeding is used for an air curtain due to an axial flow in a propeller fan type fan and an efficiency decrease and a noise problem are generated in the case where a compact fan is desired. SOLUTION: An air passage forming means provided on a periphery of a propeller fan, conducting an air-feeding to an axial direction and conducting the air-feeding from an end of the propeller fan to an outer periphery direction is provided. A thin plate-like air passage member blowing out the air-feeding in the outer periphery direction from one end, provided so as to be opposed to the propeller fan at a predetermined space in an axial direction of the propeller fan and conducting the air-feeding to the outer periphery direction between it and a side wall is provided. Since a widthwise size is made to the same degree or a smaller degree than an outer diameter size of a blade of the propeller fan, a fan with high reliability capable of ensuring a direction and an air speed of blowing air and feeding an air to a far place is obtained and the fan can be made to a compact size without largely influencing to an air-feeding property.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blower which is installed at an open entrance of a building and which can be mainly used for a technology such as an air curtain for insulating the inside and outside of a building during cooling and heating. The present invention relates to a technology and a method of using a small-sized blower that uses a propeller fan with improved noise characteristics, has a very high blowing speed, and has a large air volume.

[0002]

2. Description of the Related Art A conventional blower of this type is called an air curtain, and is a cross flow blade called a line flow fan, which is a circular and axially long blade and is provided at a position perpendicular to the suction port. It blows air to the outlet.

FIG. 17 is a side sectional view of a conventional blower using cross-flow blades disclosed in Japanese Patent Application Laid-Open No. 6-313603, as viewed from the direction of the rotating shaft. The blower main body 101 installed on the indoor side of the upper wall surface 105 of the entrance above the open entrance 106 of the house has its installation surface side 101
It has a suction port 103 on the side opposite to a and an outlet 104 on the bottom. Further, inside the blower main body 101, a cross flow van 113 for sending wind from the suction port 103 to the outlet 104 and a drive motor 114 for rotating the cross flow van 113 are provided.
13 has a fan casing 11 for guiding the flow of wind.
5 are provided. Further, a plurality of wind direction adjusting plates 116 for adjusting the direction of the blown wind are rotatably supported by the outlet 104 with the upper end as a fulcrum. When the cross flow vanes 113 are rotated by the rotation of the drive motor 114 as described above, the air sucked from the suction port 103 passes through the cross flow vanes 113 and the fan casing 11
5 blows the air to the outlet 104, and forms an air curtain flow from above the opened entrance 106 to below. In the attached state of this drawing, there is a suction space A110 between the ceiling surface 107 and the blower main body upper surface 101b opposite to the blowout port 104 of the blower main body 101, but the blower main body upper surface 101b is attached to the ceiling surface 107. Even if the suction space A110 is lost due to close contact, the suction port 103
Can be mounted without affecting the air blowing action.

[0004] In the cross flow vane, the suction port 103 and the blow out port 104 of the fan casing are symmetrical with respect to the rotation axis, and both the suction flow and the blow flow flow through the cross flow vane 113, that is, approximately 180 ° rotation. At this point, the suction flow becomes a blow-off flow, and after all, about 1
/ 2, the fan efficiency is lower than that of a propeller fan or the like, and the outer dimensions of the main body 101 are not so small because of the presence of the fan casing despite the small outer diameter of the cross flow vanes. The outlet 104 of the fan casing has a small width and a long shape in the axial direction due to the blowing of the cross flow vanes, so that the blowing flow has a high wind speed but a small air volume. Due to such a flow of wind, if there is a person directly under the outlet, it feels uncomfortable,
Furthermore, in order to secure the air volume, the blowing wind speed is further increased, and the wind speed is high also on the floor surface, which causes an unpleasant state such as blowing up dust on the floor or hitting a bounced wind against another person.

As a blower for solving the above problem, there is a blower described in Japanese Patent Application Laid-Open No. Hei 6-313603. This blower uses a plurality of propeller fans, and a plurality of blowers are provided in parallel. Since the above-mentioned blower uses a propeller fan, it is characterized by low noise and high fan efficiency, but the wind flow direction, that is, the suction direction and the blowout direction are axial directions, and the right angle direction of the conventional cross flow blade type is not.

FIG. 18 is a side sectional view showing a product configuration of a conventional propeller fan type blower. Reference numeral 35 denotes an outer case of the blower 101, and 103 denotes a suction port provided at an upper portion of the outer case.
A cylindrical bell mouth 30 having a rounded upper end 34 is formed of a resin molded product at the suction port. A motor mounting plate 36 fixes the drive motor 1 having the propeller fan 2 fixed to the rotating shaft by a blade fixing nut 42 so as to be located between the bell mouths 30. It should be noted that a plurality of blowers including the drive motor 1, the propeller fan 2, and the bell mouth 30 are provided in parallel on the outer casing 35 at equal intervals. Reference numeral 104 denotes an outlet provided at the lower portion of the outer casing 35. The outlet 104 has a structure which communicates with the inlet 103 and has a lower end rounded in the same manner as the inlet 103 so as to be bent inward. Is joined to the outlet end of the bell mouth 30 to form a smooth air path 31 on the entire inner wall of the outer casing 35.

Reference numeral 33 denotes a guide provided at the center of the outlet 104 of the outer casing 35, the apex of which is on the side of the inlet 103, and the outlet 104.
The cross section of the guide is formed in a substantially triangular shape, and each part of the guide is rounded to form a multi-layer parallel nozzle 32 in the outlet 104.

In the conventional propeller fan type blower, the flow direction of the wind is from above to below in the axial direction, and it is necessary to secure a suction space A110 between the suction port 103 and the ceiling surface 107 of the building. 101 cannot be attached closely to the ceiling surface 107. The blower main body 101 is mounted on the indoor side of the upper wall surface 105 at the entrance with a main body mounting bracket 102. When the blower is installed on the ceiling, wall, or floor, it does not come into close contact with each surface.

[0009]

In the case of a blower using cross-flow blades as shown in FIG. 17, there is a problem that the airflow cannot be secured and the sealing effect is not sufficient. In addition, the blade has a low fan efficiency of about 30%, and has a problem in that it has a particularly unpleasant noise such as a rotating sound whose frequency is determined by the number of rotations. In addition, the blades have a large number of small blades called multi-blade fans (usually about 12 blades). Since dust easily adheres to the blades, the axial length of the blades may be long, resulting in loss of balance. There was a problem that vibration increased. Furthermore, the attachment and detachment of the blades are complicated and cleaning is difficult. Further, when a propeller fan is used, FIG.
It is necessary to secure a space between the suction port 103 and the building as shown in Fig. 1 and the product cannot be attached to the ceiling surface and cannot be mounted. Was.

In addition, the swirl component of the blowout flow, which is a characteristic of the propeller fan, cannot be completely removed.
The outlet is a nozzle type, and the outlet area is smaller than the suction area, and a pressure loss occurs, and the static pressure of the blower has not been efficiently changed to the outlet dynamic pressure. As described above, there is a problem that it is difficult to secure the wind speed, and it is not possible to secure performance such as heat insulation as an air curtain. Japanese Patent Publication No. 6-35880 is known as a technique for securing the air volume and the wind speed with a propeller fan, but the structure becomes complicated, such as using a scroll casing or tilting the entire apparatus to ensure the performance. In addition, there is a problem that the dimensions are increased, and it is necessary to restrict the mounting location and to suppress the performance. In addition, there is a problem that the blowing air is widened and cannot be used for an air seal. Furthermore, because multiple propeller fans are used, air seals are used in places where the opening height is high despite the use of a large number of motors at the highest manufacturing cost, and air curtains that are effective depending on the external environment There was a problem that can not be obtained. There was a problem that had to be done. In addition, when a blower is used, a guide and a casing that are much larger than a fan are required. If the size is reduced, there is a problem that the fan efficiency is reduced and noise is increased.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and has as its object to provide a highly reliable apparatus which can secure the direction and speed of a blown wind and can blow air to a distant place. Another object of the present invention is to provide a device which can obtain a large air volume and a high wind speed in one direction with a simple structure. Another object of the present invention is to obtain a compact device without deteriorating the performance. Another object of the present invention is to provide a device and a method which are easy to use and can form a high-performance air flow such as an air curtain.

[0012]

According to a first aspect of the present invention, there is provided a blower which is driven by a driving means to rotate and blow air, and is provided around the propeller fan to guide the blow air in an axial direction and to rotate the propeller fan. Wind path forming means for guiding air blowing from the vicinity of the end in the outer circumferential direction, and using the air path forming means as one side wall, blowing air in the outer circumferential direction from one end, and applying the propeller fan to the other end surface facing the blowing direction. A fan casing connected to the side wall so as to form a closed space while maintaining a distance from the fan casing, and a side wall provided in the fan casing and opposed to the propeller fan at a predetermined interval in the axial direction of the propeller fan. A thin plate-like air passage member forming a diffuser air passage that guides air blowing in the outer circumferential direction between the thin plate-like air passage member and the other side provided on a surface facing the side wall An outlet provided in the width direction of the fan casing that guides the air from the diffuser air passage from the vicinity of the outer periphery of the fan casing and blows the air to the outside, and adjusts the size of the air passage member in the width direction by using a propeller fan. Of the same diameter as or smaller than the outer diameter of the blade.

According to a second aspect of the present invention, there is provided a blower fan which is driven to rotate by a driving means to blow air, and which is provided around the propeller fan to guide the air flow in the axial direction, and from near the end of the propeller fan to the outer circumferential direction. Air passage forming means for guiding the air to the air blower, and using the air passage forming means as one side wall, blowing air in the outer peripheral direction from one end, and closing the other end surface facing the blowing direction while keeping a distance from the propeller fan A fan casing connected to the side wall so as to form a space; and a fan provided in the fan casing and provided at a predetermined interval in the axial direction of the propeller fan so as to face the propeller fan in an outer circumferential direction between the side wall and the fan casing. Between the thin air passage member forming the diffuser air passage for guiding the air flow and the other side wall provided on the surface facing the thin air passage member and the side wall. An outlet provided in the width direction of the fan casing that guides air from the diffuser air passage from the vicinity of the outer periphery of the fan and blows the air to the outside. The shape on the side is changed so that the area on the closed space side is made smaller than the area on the blowout side to reduce the dimension in the width direction.

According to a third aspect of the present invention, there is provided a blower fan which is driven to rotate by a driving means to blow air, and which is provided around the propeller fan and guides the blow in the axial direction, and which extends from the vicinity of the end of the propeller fan to the outer circumferential direction. Air passage forming means for guiding the air to the air blower, and an air outlet for blowing the air in the outer peripheral direction provided at one end, and a multi-end surface opposed to the air outlet formed by the one side wall and the propeller fan. A fan casing connected to a semicircular side wall so as to keep a distance between the side wall and the side wall provided in the fan casing so as to face the propeller fan at a predetermined interval in an axial direction of the propeller fan. A thin plate-like air path member forming a diffuser air path for guiding air blowing in the outer peripheral direction, and the other side wall provided on a surface facing the thin plate-like air path member and the side wall; In the meantime, the air from the diffuser air passage is guided from the vicinity of the outer periphery of the fan casing and blown out from the outlet, and the shape of the air passage member is parallel to the horizontal center line passing through the center of the propeller fan and intersecting at right angles with the side wall. When the vertical center line is determined, the shape on the side close to the outlet is larger than the propeller fan, and the shape on the side farther than the outlet is two points on the horizontal center line and on the vertical center line One point larger than the outer shape of the driving means is determined on the side farther from the outlet, and these three points are connected.

According to a fourth aspect of the present invention, the size of the air path member in the width direction is 0.7 to 1.05 times the outer diameter of the blades of the propeller fan, and the size of the fan casing in the width direction is increased. From 1.2 to 1.25 times.

According to a fifth aspect of the present invention, in the blower, the air passage member is mounted at a position in the axial direction from a position near the center of the air outlet to a position shifted by a predetermined distance.

According to a sixth aspect of the present invention, there is provided a method of using a blower, comprising: a fan which is driven to rotate by a driving means to blow air; a built-in fan for guiding the air blown by the fan;
Forming a plurality of blowers having a suction port for sucking air from the outside and a fan casing having a blow-off port for blowing out to form an air curtain by arranging a plurality of blowers in a row so as to provide blow-off ports; and forming the air curtain. Replacing the plurality of blowers with the blower according to at least one of claims 1 to 3, wherein the number of blowers before replacement is reduced by closely contacting the narrow blowers after replacement. The air curtain is formed by a blower.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a side view of a product configuration of the blower of the present invention, and FIG. 2 is a front view of the blower with a decorative grille removed. FIG. 3 is a side view of a product configuration in which the shape of an air path member of the blower of the present invention is changed, and FIG. 4 is a front view of FIG. 3 with a decorative grille removed. FIG. 5 is an explanatory view of the air path member used in FIG. In the drawing, reference numeral 2 denotes a propeller fan which is driven to rotate by a drive motor 1 to perform a blowing action, 5 denotes a bell mouth casing for guiding air to the propeller fan 2, and 16 denotes a direction perpendicular to the rotation axis of the propeller fan 2. Outlet 1
And a fan casing 3 having a substantially semicircular cross section perpendicular to the rotation axis.
A first air passage member in the form of a thin plate, which is provided so as to face the propeller fan 2 at a predetermined interval and serves as a ventilation guide, 15 is a blower main body, 103 is a fan of which one face is open and has an open face. Suction port, 15a is fan suction port 1
5, a motor mounting plate for fixing the driving motor 1 and the first air path member 3 substantially at the center of the main body rear surface 15a; and 22, a propeller fan 2 on the rotating shaft 1a of the driving motor 1. The detachably mounted fan fixing nut 9 is larger than the outer diameter of the propeller fan 2 and is a diffuser wind formed between the disk-shaped first air path member 3 and the substantially parallel mounted disk-shaped first air path member 3. Road 10 is the space behind the centrifugal diffuser wind.

A larger fan casing 16 is attached to the outer peripheral portion of the first air path member 3 in a semicircle centered on the rotation shaft 1a, and a fan outlet 104 is provided on the side of the main body located on the opposite side. Is provided. The entire fan casing is formed by integrally connecting the bell mouth casing 5 serving as a ventilation guide of the propeller fan 2, the main body back surface 15a, the fan casing 16, and the air outlet 104 to the main body 15, and further including the decorative grille 14. Make up. A makeup grille 14 is detachably attached to a suction port 103 of the fan, and a plurality of left and right wind direction plates (rectifying plates) 17 are arranged at a blowout port 104 of the fan in the width direction of the scroll casing so as to partition the blowout air path in the width direction. Mounted on FIG. 2
As shown in the figure, the outlet 104 is open in the entire width of the fan casing 16 of the main body 15.

[0020] The makeup grill 1 is operated by the propeller fan 2.
4. The air sucked through the fan suction port 103 receives an axial and radial force due to the rotation of the propeller fan, and also has a bell mouth casing 5, a first air path member 3,
Thus, the velocity energy of the flow can be converted from the axial direction to the radial direction into the static pressure without waste and flow. In other words, the centrifugal diffuser air path 9 that converts the axial flow into the radial flow in the outer blowing space from the bell mouth casing to the first air path member has a large air volume and low noise of the propeller fan. The pressure (static pressure) can be increased by changing the flow by 90 ° while taking advantage of the high-efficiency feature, as compared with the axial flow, which is the flow of a conventional propeller fan. That is, the characteristics are improved by converting the speed energy, which has been wasted by the conventional propeller fan, into the static pressure by the centrifugal diffuser air path.

The air whose flow direction has been changed in the radial direction from the centrifugal diffuser air path 9 is guided by the left and right side surfaces of the blower main body 15 on the lower side in FIG. In other words, since the air is blown downward at a high wind speed due to the large air volume of the propeller fan and the pressure converted in the centrifugal diffuser air passage, the air can be blown far. In addition, the air blown upward collides with the fan casing 16 and is directed to the centrifugal diffuser rear space 10 side formed between the rear surface 15a of the main body and the first air path member 3, that is, the outer peripheral portion of the first air path member 3. The direction of the flow is changed by about 180 °, and the air is blown from the outlet 104 through the space 10 behind the centrifugal diffuser air passage. As shown in FIG. 2, the air blown to the side also collides with the semicircular fan casing or the side wall of the main body 15, and the space behind the centrifugal diffuser air path formed between the main body rear face 15 a and the first air path member 3. The direction of the flow is changed to the side 10, that is, at the outer peripheral portion of the first air path member 3, and the air is collected at the air outlet 104 which is open to the entire lower part of the main body 15, and blows out in a certain direction with a large air volume and a high wind speed. That is,
The air sucked from the front face of the decorative grill 14 changes the flow direction by 90 °, and the scroll casing 16 collects and blows the radial flow toward the four sides of the box-shaped main body to one side of the box-shaped main body side.

[0022] In the case of a scroll-type casing in which the beginning of a roll exists as in a conventional fan and the vortex is expanded toward the air outlet to smoothly flow the wind, the air volume can be secured and the noise can be reduced. The diffused wind blown out from the expanded outlet has a greatly different wind speed depending on the position of the outlet, and it is difficult to blow the air to a distant place. As shown in FIGS. 3 and 4 of the present invention, the gap between the fan casing 16 and the air path member 3 is the same on the closed side, that is, on the opposite side of the blow-off side. Since it concentrates on the side and the wind flow is concentrated in a certain direction without being diffused after leaving the fan, it can be blown far away while maintaining the air volume and wind speed. Further, a casing back space 27 is formed between the fan casing 16 and the main body 15, and can accommodate components and wiring. In addition, the propeller fan is a centrifugal fan and has a simpler blade shape than other blades such as a cross-flow fan, so that it can be easily manufactured with light metal, has high strength and light weight, can rotate at high speed, can be small, and can obtain a large air volume.

In such a blower, as shown in FIGS. 3 and 4, the plate 3 as the first air passage member has a circular shape, and a similar shape is described in Japanese Patent Application No. 11-265191. Among them, the shape of the first air path member 3 is optimally 1.15 to 1.2 times the outer diameter of the blade. However, in the present invention, the shape of the first air path member 3 could be further reduced without greatly affecting the air blowing performance. In the configuration shown in FIGS. 3 and 4, the air path member is formed in a circle with respect to the axial center of the fan, but the outer diameter of the air path member is 0.7- The diameter is as small as 1.05 times. 1 and 2, the shape of the downsized first air path member 3 is the center of rotation of the propeller fan 2, which is the same as the center of the drive motor 1 but at the center position. When considering the horizontal center line that becomes horizontal and the vertical center line that becomes vertical when viewed from the front view as shown in FIG. 2, the lower side of the horizontal center line in FIG.
The shape of the first air path member 3 on the half of the four sides is 1.15 to 1.2 times the outer diameter of the blade, and the closed space above the horizontal center line, that is, the scroll casing 16 side as shown in FIG. The shape of the half of this side is such that the lower side, that is, the first air path member 3 on the side of the outlet has two ends intersecting the horizontal center line, and the drive motor 1 can be mounted on the vertical center line. The size is reduced to include a point larger than the outer diameter of the motor 1. Thereby, the width dimension of the main body 15 which is the length dimension of the outlet as shown in FIG. 2 can be significantly reduced. At this time, the area above the horizontal center line formed by the first air path member 3 and the scroll casing 16 secures 60% or more of the area formed by the scroll casing 16 and the horizontal center line. It is formed so that

FIGS. 6A and 6B show the difference in wind speed distribution due to the difference in the air blowing method when the air blower of the same size as the air curtain, for example, is used as the product of the air curtain, and FIG. 6A shows the propeller fan. In the case of a blower provided with an air path member forming a diffuser by a formula, (b) is a case of a conventional propeller fan type blower of FIG. 18, and (c) is a case of a conventional cross-flow blade type blower of FIG. And the standard installation height of each product is 3.5 m. In FIG. 6, the vertical axis indicates the distance from the blower outlet, that is, the distance from the product, between 0 m and 3.5 m,
The horizontal axis indicates the width dimension of the blower, that is, the width dimension of the product, and 1 and 10 are both ends of the product, 5 and 6 are near the center of the product, and are classified into the wind speed of the air blown out from the product outlet, for example, The division of the region of the wind speed of 7-10 m / s or 1-4 m / s is shown.

In the case of (a) according to the present invention, there is no unevenness in the air flow as a whole product. In addition, when the wind speed at the position of 3.5 m, which becomes the floor when installed at a standard installation height, is 1-4,
The air velocity is 3 m / s or more in the m / s wind speed area, and when air is blown for the purpose of shutting off the wind that is going to enter from the outside, a sufficient air sealing effect can be expected. .

(B) In the case of the conventional propeller fan type,
It can be seen that although the air blow is relatively uneven as a product, the wind speed near both ends of the product is generally low. For this reason, when air is blown for the purpose of shutting off the wind or the like, the shutoff effect near both ends is reduced as compared with the central portion of the product. Also, when looking at the wind speed at 3.5m, which is the floor when installed at a standard installation height, only the central part can maintain 3m / s or more only at the center, and for the purpose of blocking wind etc. Even if air is blown, the effect is weaker than that of the present invention.

In the case of the conventional cross flow vane type of (c), the wind speed at the position of 3.5 m on the floor surface when installed at the standard installation height is 3 m / s or more, and the wind is shut off. When air is blown for the purpose, the same blocking effect as in the present invention can be expected, but since the motor is installed in the center of the product as a product structure, air cannot be blown particularly at the center of the product near the outlet, and Even if air is blown from the product for the purpose of blocking, for example, a portion where the blocking effect cannot be expected near the center of the product or the end of the main body is generated. In addition, the shutoff effect includes the shutoff of heat that shuts off the hot and cold heat generated by an air conditioner, such as in a room. It cannot be raised. On the other hand, when the outside wind is shut off, the durability against the outside wind is weak when the wind speed at which the air sealing is performed is low.

At this time, the power consumption in the case of the conventional cross flow blade type (c) was 500 W,
The power consumption by the fan of (a) was 385 W. Although the power consumption in the case of the conventional propeller fan type of (b) was 246 W, as described above, as a product (a),
3.5 m due to poorer blocking performance than that of (c)
There is a problem as an air curtain with respect to the height. Furthermore, as for noise performance, by comparison in the actual installation state,
In the case of the conventional cross-flow blade type (c) of 72 dB,
In the case of (a) according to the present invention, 68 dB was obtained. (B)
Was 68 dB in the case of the conventional propeller fan type.

By using a small-sized propeller fan capable of producing an air volume and by blowing the air while maintaining the static pressure characteristics by a diffuser at a right angle and blowing the air at a constant air velocity, the air volume and the air velocity and low noise are obtained. Thus, an effective air curtain can be obtained. On the other hand, when the blower is downsized, even with this diffuser type propeller fan, the air passage area decreases, the pressure loss increases, the amount of air blow decreases, and the noise increases.Therefore, in the present invention, a diffuser is used to improve the air blow characteristics. The width dimension of the formed air path member is reduced, and the shape of the air path member is changed. When viewed from the application of the air curtain, etc.,
There are two types: large-scale buildings and department stores that have an opening height of 3.5 m, and truck-yards and other factories that have an opening height of about 5 m. In the latter case, the air volume needs to be increased further than in FIG. As described above, the width of the air path member is increased as a means for increasing the air volume, or as a means for increasing the wind speed even in a severe outdoor environment even when the opening height is 3.5 m. It is sufficient to use a blower having a diameter equal to or smaller than the outer diameter of the blade of the propeller fan.

Each of the blowers is a fan which is driven by a driving means to rotate and blows air, a built-in fan for guiding the blown air from the fan, and a suction port for sucking air from the outside and a blowout port for blowing the air to the outside. However, since the number of rotations has an upper limit, the amount of air cannot be increased. Also, if the rotational speed is forcibly increased from the most efficient one, the electric input will increase significantly and energy will be wasted. On the other hand, when the size of the blades is increased, the size of the blower also increases. When a plurality of blowers are arranged in a row so as to provide air outlets to form an air curtain, they cannot be accommodated in an opening for installing a product. For example, the width of the opening is determined as 1.2 m. Further, even if the blades are made smaller and the number of units arranged in parallel is increased, the amount of air blown from each unit also decreases according to the blade diameter, so that this is not a measure. Therefore, as in the present invention, the dimensions of the blades of each unit, that is, the size of the unit itself is reduced while maintaining the air flow rate, and the performance and noise increase due to the reduction in size, that is, the air path area of the diffuser portion is reduced. The shape and dimensions of the air path member are obtained so as to maintain the pressure in the direction in which the air path does not decrease and secure the air path area.
Due to this miniaturization, the number of a plurality of blowers forming an air curtain with respect to the opening is increased.
A plurality of blowers according to the present invention are closely attached to each other, and the air outlets are arranged in a row so that the sucked air is blown out, whereby an effective air seal that secures the air volume and the wind speed can be obtained, and the air-conditioned air in the room is unnecessarily exchanged with the outside. Energy measures can be taken without doing so. On the other hand, if the existing blower for the air curtain uses a conventional cross-flow fan or a conventional propeller fan, and it is not possible to block the effects of external wind, etc. By replacing the blower of the present invention with the blower of the present invention, the narrower blower after the replacement is closely arranged and the air curtain is formed by a larger number of blowers than the number of the blowers before the replacement, thereby saving energy. The effect can be enhanced.

Embodiment 2 7 to 12 are explanatory views of another embodiment of the present invention, wherein the same reference numerals indicate the same parts. 7, the width of the first air passage member 3 is further cut in parallel with the side surface of the main body at a position 0.7 to 1.05 times the outer diameter of the propeller fan 2 from FIG. 2 of the first embodiment. And the diameter of the fan casing 16 is 1.2 to 1.2 times the outer diameter of the propeller fan 2.
It is 1.25 times. Thus, the width of the main body 15 can be reduced.

As shown in Example 1 of the above-mentioned embodiment, for example, a blower configured as an air curtain having a standard installation height of 3.5 m and a product having a standard installation height of 5 m will be reconfigured. In consideration of this, an increase in the amount of air blown as a product is usually considered in order to make the air blow farther. To consider the increase in air volume, it is conceivable to increase the outer diameter of the blade.In the case of a product such as an air curtain, the width of the product, etc. Has been determined in relation to. Therefore, when the outer diameter of the blade is increased, the number of blowers to be used must be reduced depending on the product size, and the product air volume is reduced. Conversely, even if the number of blowers used is increased, the outer shape of the blade must be reduced, which is less effective as a product. If you can increase the number of rotations of the blade, you can increase the air volume,
In the case of the blower described in the first embodiment, an AC induction type motor is usually used, and the rotation speed of this type of motor has an upper limit depending on the power supply frequency, and the air volume cannot be increased beyond a certain value. For this reason, if the size of the fan casing 16 and the first air path member 3 is reduced while maintaining the air blowing performance, the size of the air blower is reduced, and if the number of used air blowers is not increased as a product configuration, the air volume as the product configuration is reduced. I couldn't increase it.

FIG. 7 shows the side of the first air path member 3 cut at a position 0.7 to 1.05 times the blade diameter in parallel with the side of the main body, and the first air path above the horizontal center line. As in the case of the first embodiment, the shape of the member 3 is such that the lower first air path member 3 has two ends intersecting the horizontal center line at both ends, and the drive motor 1 can be mounted on the vertical center line. Including the point taken larger than the outer diameter of the drive motor 1, the first air path member 3 and the scroll casing 16
Are formed so that the area above the horizontal center line formed by (1) and (2) secures at least 60% of the area formed by the scroll casing 16 and the horizontal center line. When the air path member 3 is attached integrally with the motor,
The air passage member is sandwiched between the motor mounting foot and the motor, so that the motor mounting foot can be screwed together with the motor mounting foot. At this time, compared to the first embodiment, the blowing performance such as the air volume and the noise is substantially maintained, and the size of the main body of the blower can be reduced. Further, since it is possible to increase the number of blowers that can be used within the determined product dimensions, it is possible to increase the amount of air blow as a product form of the entire air curtain.

FIG. 7 shows an embodiment in which the blower is specifically reduced in size. The diameter of the upper part of the first air path member 3 with respect to the diffuser air path is 1.15 to 1.2 of the blade radius.
It has a double arc shape, and its both ends reach the side of the first air path member 3 on the extension of the blade center line. At this time, the side of the first air path member 3 is cut at a position about 0.95 times the blade diameter in parallel with the side surface of the main body. In this case, the area of the air path between the first air path member 3 and the diffuser air path is 70 to 75% of the area of the air path between the blade center line and the diffuser air path. In this prototype, the body size is 240 x 290m
m, the propeller fan outer diameter is 210 mm, and the fan casing radius is 130 mm.
When driven at 0 r / m, the air flow was almost maintained.

FIG. 8 shows another embodiment in which the size of the blower is reduced. The upper part of the first air path member 3 with respect to the diffuser air path is horizontally cut to the air outlet in the vicinity of the blade center line except for a portion to be attached to the motor. At this time, the side of the first air path member 3 is cut in a position approximately 0.95 times the blade diameter in parallel with the side surface of the main body. In this case, the air passage area between the first air passage member 3 and the diffuser air passage is 75 to 80% of the air passage area between the blade center line and the diffuser air passage. In this prototype, the main body outer shape is 240 × 290 mm, the propeller fan outer diameter is 210 mm, and the fan casing radius is 130 mm.
mm, when the propeller fan 2 was driven at a rotation speed of about 2720 r / m, the air volume could be almost maintained. However, as compared to the shape shown in FIG. 2, there is a corner in the upper half, which may be an edge, so that the noise value increased by about 0.4 dB and the peak noise value increased by about 1.9 dB.

FIG. 9 shows another embodiment in which the blower is miniaturized. The upper portion of the first air path member 3 with respect to the diffuser air path is cut horizontally at the outlet at a position where the portion to be attached to the motor remains. With this, the wind path was slightly reduced to reduce the sound. At this time, the side of the first air path member 3 is cut in a position approximately 0.95 times the blade diameter in parallel with the side surface of the main body. This time, the air passage area between the first air passage member 3 and the diffuser air passage is about 65% of the air passage area between the blade center line and the diffuser air passage. In this prototype, when the propeller fan 2 is driven at a rotation speed of about 2750 r / m with a body outer shape of 240 × 290 mm, a propeller fan outer diameter of 210 mm, and a fan casing radius of 130 mm,
The air volume was almost maintained. However, the noise value is about 0.4 dB and the peak noise value is 1.7 as compared with the shape shown in FIG.
It increased by about dB and did not change much from FIG.

FIG. 10 shows another embodiment in which the blower is miniaturized. The upper part of the first air path member 3 with respect to the diffuser air path is cut horizontally at the outlet at the position where the portion to be attached to the motor remains as in the above-mentioned figure. At this time, the side portion of the first air path member 3 is cut parallel to the side surface of the main body at a position about 1.05 times the blade diameter. This study was conducted to increase the size of the sides and increase the diagonal flow effect of the diffuser. This time, the air passage area between the first air passage member 3 and the diffuser air passage is about 60 to 65% of the air passage area between the blade center line and the diffuser air passage. In this prototype, even when the propeller fan 2 is driven at a rotational speed of about 2740 r / m with a body outer shape of 240 × 290 mm, a propeller fan outer diameter of 210 mm, and a fan casing radius of 130 mm, the air volume is larger than that of the above-described shape shown in FIG. Is about 1% lower.
Although the noise value did not change, the peak noise value was reduced by about 0.5 dB.

FIG. 11 shows another embodiment in which the blower is miniaturized according to the third embodiment. The upper part of the first air path member 3 with respect to the diffuser air path has a blade radius of 0.7 to 0.8.
It has a double arc shape, and its both ends reach the side of the first air path member 3 on the extension of the blade center line. At this time, the first
The side portion of the air path member 3 is also cut at a position 0.7 to 0.8 times the blade diameter in parallel with the side surface of the main body. This time, the air passage area between the first air passage member 3 and the diffuser air passage is about 60 to 65% of the air passage area between the blade center line and the diffuser air passage. In this structure, although the area of the air passage at the side portion is increased, as the range of the air passage member 3 which is larger than the blade diameter at which the oblique flow effect occurs becomes smaller, the oblique flow effect is reduced and the wind speed is reduced. That is, in the present invention, the flow from the propeller fan is pressure-recovered by the mixed flow plate and is resistant to pressure loss, and the balance between the mixed flow effect of creating a flow at a higher wind speed and the reduction of the pressure loss by securing the air passage area is achieved. Are considering. In this prototype, when the propeller fan 2 is driven at approximately 2770 r / m with a main body outer shape of 240 × 290 mm, a propeller fan outer diameter of 210 mm, and a fan casing radius of 130 mm, the air volume is 1% compared to the shape shown in FIG. About rise. The noise value rises by about 0.6 dB, and the peak noise value also becomes 1.5 d.
It goes up about B.

FIG. 12 shows another embodiment in which the size of the blower is reduced. The upper part of the first air path member 3 with respect to the diffuser air path is formed in an arc shape having a radius of about 0.95 times the blade radius, and both side ends thereof are formed by extending the blade center line to the side portions of the first air path member 3. Has been reached. At this time, the side of the first air path member 3 is also cut at a position about 0.95 times the blade diameter in parallel with the side surface of the main body. The air passage area is reduced this time, and the air passage area between the first air path member 3 and the diffuser air path is about 35 to 40% of the air path area between the blade center line and the diffuser air path. In this prototype, the body size is 240 x 290m
m, the propeller fan outer diameter is 210 mm, and the fan casing radius is 130 mm.
When driven at 0 r / m, the air volume is reduced by about 1.4% as compared with that of the shape shown in FIG. The noise value is almost the same,
The peak noise value only dropped by about 0.8 dB. As described above, the air path members having various dimensions and shapes shown in FIGS. 7 to 12 have been examined. The air path members are within the usable range and can be selected based on the required characteristic specifications, for example, by reducing the sound. become.

Embodiment 3 FIG. 13 is a side view of the blower of the present invention shown in FIG. The same reference numerals as those in the other drawings denote the same components. Reference numeral 18 denotes a front and rear wind direction plate. At this time, the first air path member 3 is fixed together with the drive motor 1 to a motor mounting plate 11 mounted substantially at the center of the main body back surface 15a.
At this time, the position of the air path member 3 is located substantially at the center of the outlet 104.

FIG. 14 shows the first air path member 3 of FIG. 13 approaching the propeller fan 2 having a vertical width of 5% of the outlet port 104. That is, the air path member is moved 5 m in the axial direction as compared with FIG.
It is shifted to m propeller fan. At this time, both the air volume and the noise value are almost the same as those in FIG.

FIG. 15 is a view in which the first air path member 3 of FIG. That is, the air passage member is shifted in the axial direction by 10 mm toward the propeller fan as compared with FIG. At this time, both the air volume and the noise value are almost the same as those in FIG.

FIG. 16 is a view in which the first air path member 3 of FIG. That is, as compared with FIG.
It is shifted to the 5mm propeller fan. At this time,
Although the noise value was almost the same as in FIG. 13, the air volume was reduced by about 2%. From the above, it is possible to maintain the characteristics desired for the purpose within this range, that is, within a range shifted by about 15% from the vicinity of the center of the outlet. The axial position of the wind path member is shifted in accordance with the arrangement of the front and rear wind direction plates 18 so as to obtain a smooth blow out or in accordance with the mounting structure of the wind path member. It should just be arranged in.

[0044]

According to the first aspect of the present invention, there is provided a propeller fan which is driven to rotate by a driving means to blow air,
A wind path forming means provided around the propeller fan for guiding the air flow in the axial direction and for guiding the air flow from the vicinity of the end of the propeller fan in the outer circumferential direction. A fan casing connected to a side wall so as to form a closed space while maintaining a distance from the propeller fan at the other end surface facing the blowing direction, and a propeller fan housed in the fan casing. A thin air path member provided to face the propeller fan at predetermined intervals in the axial direction and forming a diffuser air path between the side wall and the outside to guide air blowing, and the thin air path member and the side wall The width of the fan casing that guides the air from the diffuser air passage from the vicinity of the outer periphery of the fan casing to the other side wall provided on the surface facing the And the size of the air passage member in the width direction is made equal to or smaller than the outer diameter of the blades of the propeller fan, so that the direction and speed of the blown air are secured. A highly reliable blower that can blow air to a distant place can be obtained, and the blower can be downsized without greatly affecting the blowing performance.

According to the second aspect of the present invention, a propeller fan which is driven to rotate by the driving means to blow air, and which is provided around the propeller fan to guide the air flow in the axial direction, and from the vicinity of the end of the propeller fan to the outer periphery Air path forming means for guiding air blowing in a direction, and the air path forming means as one side wall, blowing air blowing in the outer peripheral direction from one end, and keeping the other end face facing the blowing direction with the propeller fan at a distance. A fan casing connected to the side wall so as to form a closed space, and provided in the fan casing so as to face the propeller fan at a predetermined interval in the axial direction of the propeller fan and between the side wall and the outer peripheral direction. Between a thin plate-like air path member forming a diffuser air path for guiding air blowing and the other side wall provided on the surface facing the thin plate-like air path member and the side wall An outlet provided in the width direction of the fan casing that guides the air from the diffuser air passage from the vicinity of the outer periphery of the fan casing and blows the air to the outside. By changing the shape of the side and making the area in the closed space side smaller than the area on the blowout side and holding down the width direction size, it is possible to obtain a blower that can reduce the size of the blower with a simple structure and secure the air volume and wind speed be able to.

According to the third aspect of the present invention, a propeller fan which is driven to rotate by the driving means to blow air, and which is provided around the propeller fan to guide the air in the axial direction, and to extend from the vicinity of the end of the propeller fan to the outer periphery Airflow path forming means for guiding airflow in the direction, the airflow path forming means as one side wall, and an outlet for blowing airflow in the outer peripheral direction is provided at one end,
A fan casing connected to a side wall having a semicircular shape so as to maintain a distance from the propeller fan at a multi-end surface facing the air outlet, and a predetermined interval in the axial direction of the propeller fan stored in the fan casing. A thin air path member that forms a diffuser air path that is provided so as to face the propeller fan and guides the air in the outer peripheral direction between the side wall and the side wall, and faces the thin air path member and the side wall. In addition to guiding the air from the diffuser air passage from the vicinity of the outer periphery of the fan casing to the other side wall provided on the surface and blowing it out from the outlet, the shape of the air passage member passes through the center of the propeller fan and intersects the side wall at a right angle. When the horizontal center line and the vertical center line that is parallel to the side wall are determined, the shape of the side close to the outlet from the horizontal center line is larger than that of the propeller fan. The shape on the side farther from the outlet is determined at two points on the horizontal center line and one point larger than the outer shape of the drive means on the side farther than the outlet on the vertical center line, and these three points are connected, which greatly affects the blowing performance. The fan can be reduced in size without any trouble.

According to the fourth aspect of the present invention, the size of the air passage member in the width direction is 0.7 to 1.05 times the outer diameter of the blade of the propeller fan, and the size of the fan casing in the width direction is increased. 1.2 to 1.25 times, the blower body can be downsized while maintaining the blowing performance, and a product configuration that can increase the blowing volume by incorporating more blowers with a certain product size is possible. Becomes

According to the fifth aspect of the present invention, the air passage member is mounted between the center of the air outlet and the predetermined position in the axial direction. Any good position can be determined.

According to the sixth aspect of the present invention, a fan which is driven to rotate by a driving means to blow air, a fan which incorporates the fan and guides the air blown by the fan, and a suction port for sucking air from the outside and to the outside. A fan casing having a blowout outlet, and a step of arranging a plurality of blowers having a row of blowout ports to form an air curtain, and forming the plurality of blowers forming the air curtain into a blower of the present invention. Replacing, and
The air curtain is formed with a larger number of blowers than the number of blowers before replacement with the narrow width blower after replacement closely attached, so the air curtain flow with high air sealing effect in any environment Can be formed, and a method of using a blower having a large energy reduction effect can be obtained.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a blower according to an embodiment of the present invention.

FIG. 2 is a front view of the blower according to the embodiment of the present invention in a state where a makeup grill is removed.

FIG. 3 is a side sectional view of a blower according to an embodiment of the present invention.

FIG. 4 is a front view of the blower according to the embodiment of the present invention in a state where a makeup grill is removed.

FIG. 5 is a front view of a state where an inner drive motor and a first air path member of FIG. 2 are extracted.

FIGS. 6A and 6B show a distribution diagram of wind speed of air blown by a blower according to an embodiment of the present invention, wherein FIG.
FIG. 3 is a diagram showing a conventional propeller fan type, and FIG. 3C is a diagram showing a conventional cross-flow blade type.

FIG. 7 is a front view of a blower according to another embodiment of the present invention with a makeup grill removed.

FIG. 8 is a front view of a blower according to another embodiment of the present invention, with a makeup grill removed.

FIG. 9 is a front view of a blower according to another embodiment of the present invention, with a makeup grill removed.

FIG. 10 is a front view of a blower according to another embodiment of the present invention, with a decorative grille removed.

FIG. 11 is a front view of a blower according to another embodiment of the present invention in a state where a makeup grill is removed.

FIG. 12 is a front view of a blower according to another embodiment of the present invention in a state where a decorative grill is removed.

FIG. 13 is a side sectional view of a blower according to another embodiment of the present invention.

FIG. 14 is a side sectional view of a blower according to another embodiment of the present invention.

FIG. 15 is a side sectional view of a blower according to another embodiment of the present invention.

FIG. 16 is a side sectional view of a blower according to another embodiment of the present invention.

FIG. 17 is a side sectional view of a conventional blower.

FIG. 18 is a side sectional view of a conventional blower.

[Explanation of symbols]

1 drive motor, 2 propeller fan, 3 first
Air path member, 5 bell mouth casing, 9 centrifugal diffuser air path, 10 centrifugal diffuser air path back space, 11 motor mounting plate, 14 decorative grille, 15 body, 16 fan casing, 17
Left and right wind direction plate, 18 front and rear wind direction plate, 22 blade fixing nut, 23 motor fixing screw, 27 scroll casing back space, 30 bell mouth, 31 smooth air path, 32 multilayer parallel nozzle, 33 guide,
34 roundness, 35 blower housing, 36 motor mounting plate, 101 blower main body, 102 main body mounting bracket, 103 suction port, 104 blow port, 105
The upper wall of the doorway, 106 the open doorway,
107 ceiling surface, 108 floor surface, 109 wall surface without opening, 110 suction space, 113 cross-flow fan,
114 drive motor, 115 fan casing, 116 wind direction board.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shigeki Kobayashi 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsui Electric Co., Ltd. (72) Hideaki Kashiwara 2-3-2 Marunouchi 3-chome, Chiyoda-ku, Tokyo Rishi Electric Co., Ltd. F-term (reference) 3H034 AA02 AA18 BB02 BB08 BB19 BB20 CC03 DD06 DD12 EE06 EE12 EE18

Claims (6)

[Claims] A propeller fan which is driven to rotate by a driving means to blow air, and a wind provided around the propeller fan for guiding the blow in the axial direction and for guiding the blow in the outer circumferential direction from near the end of the propeller fan. Road forming means;
The air path forming means is used as one side wall, and the air blowing in the outer peripheral direction is blown out from one end, and the other end surface facing the blowing direction is separated from the side wall so as to form a closed space while keeping a distance from the propeller fan. A connected fan casing and a diffuser air passage housed in the fan casing and provided at a predetermined interval in the axial direction of the propeller fan so as to face the propeller fan and guide the air blow in an outer peripheral direction between the side wall and the diffuser air passage. The air flow from the diffuser air passage is guided from the vicinity of the outer periphery of the fan casing between the thin air passage member to be formed and the other side wall provided on the surface facing the side wall and the thin air passage member. An outlet provided in the width direction of the fan casing that blows out to the outside,
A blower, wherein the size of the air path member in the width direction is equal to or smaller than the outer diameter of the blade of the propeller fan. 2. A propeller fan which is driven to rotate by a driving means to blow air, and a wind provided around the propeller fan to guide the blow in the axial direction and to guide the blow in the outer circumferential direction from near the end of the propeller fan. Road forming means;
The air path forming means is used as one side wall, and the air blowing in the outer peripheral direction is blown out from one end, and the other end surface facing the blowing direction is separated from the side wall so as to form a closed space while keeping a distance from the propeller fan. A connected fan casing and a diffuser air passage housed in the fan casing and provided at a predetermined interval in the axial direction of the propeller fan so as to face the propeller fan and guide the air blow in an outer peripheral direction between the side wall and the diffuser air passage. The air flow from the diffuser air passage is guided from the vicinity of the outer periphery of the fan casing between the thin air passage member to be formed and the other side wall provided on the surface facing the side wall and the thin air passage member. An outlet provided in the width direction of the fan casing that blows out to the outside,
The shape of the air path member is changed from the center of the propeller fan to the shape of the outlet side and the closed space side, and the area of the closed space side is made smaller than the area of the blowout side to suppress the width direction dimension. Features blower. 3. A propeller fan which is driven to rotate by a driving means to blow air, and a wind provided around the propeller fan for guiding the blow in the axial direction and for guiding the blow in the outer circumferential direction from near the end of the propeller fan. Road forming means;
The air path forming means is used as one side wall, and an outlet for blowing the air in the outer peripheral direction is provided at one end, and a multi-end surface facing the outlet is formed in a semicircular shape so as to keep a distance from the propeller fan. A fan casing connected to the side wall and provided in the fan casing so as to be opposed to the propeller fan at a predetermined interval in an axial direction of the propeller fan and to guide airflow in an outer circumferential direction between the side wall and the fan casing A thin plate-like air path member forming a diffuser air path,
And between the thin plate-shaped air passage member and the other side wall provided on the surface facing the side wall, guiding air from the diffuser air passage from near the outer periphery of the fan casing and blowing the air from the air outlet. When the shape of the air path member determines a horizontal center line passing through the center of the propeller fan and intersecting at right angles to the side wall and a vertical center line parallel to the side wall, blowing is performed with the horizontal center line as a boundary. The shape closer to the mouth is larger than the propeller fan, and the shape farther from the outlet is two points on the horizontal center line and one point larger than the outer shape of the driving means on the side farther than the outlet on the vertical center line. The blower is characterized by connecting these three points. 4. The size of the air passage member in the width direction is 0.7 to 1.05 times the outer diameter of the blades of the propeller fan, and the size of the fan casing in the width direction is 1.2 to 1 times. .
4. The method according to claim 1, wherein the number is 25 times.
The blower described 5. The blower according to claim 1, wherein the air path member is mounted in an axial direction between a position near the center of the air outlet and a predetermined position. . 6. A fan which is driven to rotate by a driving means to blow air, a fan which incorporates the fan and guides air blown by the fan, and has a suction port for sucking air from outside and a blowout port for blowing air to the outside. 4. A step of arranging a plurality of blowers having a casing so as to provide air outlets in a row to form an air curtain, and at least one of the plurality of blowers formed with the air curtain. Replacing the blower with a narrower blower, and forming the air curtain with a greater number of blowers than the number of blowers before replacement with the narrower blower after the replacement being placed in close contact with the blower. Method.