JPH0363437A - Double reverse type ventilator - Google Patents

Abstract

PURPOSE:To facilitate molding of a body with resin, to reduce the number of components and to improve assembling properties and maintainability by so mounting motor mounting legs as to cross the adhering positions of the body, and coupling cylinders via adhering flanges. CONSTITUTION:Two sets of axial flow impellers 2 and drive motors 2 are disposed in series in a cylindrical body 1, and the two impellers 2 are rotated reversely. A pair of drive motors 3 are secured by a screw 5 so engaged at the opposite side to a rotational shaft with a holder 4a composed at the center of a sole motor mounting leg 4. The body 1 is formed of a split structure by adhering two resin cylinders 8 of the same shape having a bell mouth 6 at one end and flanges 7. The leg 4 is so engaged within the body 1 as to cross over the adhered parts of the body 1 by arcuate flange 4c formed at the free end of the leg part 4b of the leg 4.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a counter-rotating type ventilation device in which a pair of axial flow impellers and a drive motor for rotating the impellers are arranged in series within a cylindrical main body. It is.

[Prior Art] FIG. 6 is a sectional view showing a conventional counter-rotating ventilation device disclosed in, for example, Japanese Patent Publication No. 4895/1983. That is, this counter-rotating ventilation system has a configuration in which an axial flow impeller 21 and a drive motor 22 for driving the impeller are arranged in series on the center line of a straight pipe-shaped main body 20 having flanges at both ends. It has become. - One set of axial flow impeller 21 and drive motor 22 is connected to one motor mounting leg 23, and another set of axial flow impeller 21 and drive motor 22 is connected to another motor mounting leg 23.
4 are respectively attached within the main body 20. The power lead of each drive motor 22 is pulled out from a pull-out hole made in the main body 20.

In the counter-rotating ventilation system described above, the rotational directions of the two axial flow impellers 21 rotationally driven by the respective drive motors 22 are opposite, but the air blowing direction is unidirectional as shown by the arrow in the figure. It is connected to a ventilation duct (not shown) and used for ventilation.

[Problems to be Solved by the Invention] In conventional counter-rotating type ventilation devices, it is difficult to make the main body 20 a resin molded product due to its long axial dimension. In order to ensure the strength of the motor 20, its wall thickness must be increased, and since the two sets of drive morphs 22 and axial flow impeller 21 are individually attached to the main body 20 with motor mounting legs 23 and 24, parts In addition to the large number of points, it is difficult to ensure concentricity, and there are also problems to be solved such as the need to remove one of the drive motors 22 for maintenance such as cleaning.

This invention was made in order to solve such conventional problems, and provides a counter-rotating ventilation system whose main body is easily molded from resin, has a small number of parts, and is easy to assemble and maintain. The purpose is to

[Means for Solving the Problems] A counter-rotating ventilation device according to the present invention has a pair of drive motors mounted on a single motor mounting leg so that their opposite rotation shaft sides face each other, and a cylindrical main body. has a configuration in which two cylinders having a bell mouth portion at one end and a joining flange portion at the other end are joined at each other's joining flange, and the motor mounting leg is attached so as to straddle the joining point of the main body. The cylindrical bodies are connected to each other at the joint flange.

In addition, another counter-rotating type ventilation device according to the present invention particularly provides a protrusion on approximately half of the circumference of the joint surface of the joint flange portion of each cylindrical body constituting the main body, and a protrusion on the other half of the circumference. In this example, grooves are formed into which the above-mentioned protrusions can fit.

Further, in another counter-rotating type ventilation device according to the present invention, the motor mounting leg is configured in an I-shape in which U-shaped members facing each other are connected to the main body. A notch is provided in the 7-lunge for temporarily fixing the power supply lead of the drive motor.

[Function] In the counter-rotating ventilation device of the present invention, since the main body is divided in the axial direction, the main body can be easily molded from resin because the axial dimension is short. Furthermore, since each drive motor is attached by a single motor attachment leg, the number of parts is reduced, and concentricity of the drive motor and axial flow impeller can be easily achieved, improving ease of assembly. Furthermore, since each axial flow impeller faces each open end of the main body, they can be cleaned by being attached and removed from each open end of the main body.

In addition, in other counter-rotating type ventilation devices of the present invention, in particular, the joint portion of the cylindrical body is constituted by mutual engagement of the protrusions and the grooves, so that it is possible to maintain a high degree of airtightness in this portion. .

Furthermore, in another counter-rotating ventilation system of the present invention,
In particular, the power lead of the drive motor can be temporarily fixed in the notch of the motor mounting leg, making it easier to operate the power lead and improving ease of assembly.

[IMPLEMENTATION IMI] FIGS. 1 to 5 all show an embodiment of a counter-rotating ventilation system according to the present invention. That is, in the counter-rotating type ventilation system of this example, two sets of axial flow impellers 2 and drive motors 3 for rotationally driving the impellers are arranged in series in a cylindrical main body 1. It is designed to rotate in the opposite direction. The pair of drive motors 3 are fitted into a holding part 4a formed in the center of a single motor mounting leg 4 so that their counter-rotating shaft sides face each other, and are fixed with screws 5.The main body 1 is divided into two parts. In this structure, two resin cylinders 8 having the same shape and having a bell mouth portion 6 at one end and a joining flange portion 7 at the other end are joined together at the joining flange portions 7 of each other. The motor mounting leg 4 to which the drive motor 3 is fixed is attached to the main body 1 so that the arc-shaped flange 4C formed at the free end of the leg 4b straddles the joint of the main body 1.
A single screw 9 is fitted into the flange 4c from both sides of the cylindrical body 8 and is attached to the flange 4c. By attaching the motor mounting leg 4, the cylinder #8 is connected and connected at the joining flange portion 7 by the flange 4c of the motor mounting leg 4. Each axial flow impeller 2 is removably mounted on a rotating shaft facing each open end of the main body 1 of a drive motor 3, and is rotated by each drive motor 3 in mutually opposite directions.

However, the air blowing direction is unidirectional as shown by the arrow in FIG. 1, as in the conventional example.

To explain the structure of the main body 1 in more detail, each cylinder 8 has several ring-shaped reinforcing ribs 10 (two in the case of rotation) integrally molded on the outer periphery between the bell mouth part 6 and the joining flange part 7. has been done.

Further, on the joint surface of the joint flange portion 7 of each cylinder 8, a protrusion 11 is integrally molded on approximately half of its circumference, and a groove 12 into which the protrusion 11 can fit is formed on the remaining half. There is. Therefore, the joint portion of the main body 1 has a structure in which the protrusions 11 and the grooves 12 engage with each other, and the airtightness of this portion is maintained at a high level. Further, two notches 13 are formed close to each other at the joining end of each cylinder 8, and two extraction holes are formed by the notches 13 when the cylinders 8 are joined together. The motor mounting leg 4 attached to the main body 1 is configured in an I-shape in which members having U-shaped ends are opposed and connected, and an arc-shaped flange 4C serves as a connection part to the main body 1.
A notch 15 for temporarily fixing the power supply lead 14 of the drive motor 3 is provided in the circumferential direction.

To assemble the counter-rotating type ventilation system having the above configuration, the power lead 14 of each drive motor 3 is temporarily fixed by inserting it into the notch 15 formed in the flange 4c of the motor mounting leg 4 as shown in FIG. Then, connect the cylindrical body 8 from both sides with its notch 13 aligned with the notch 15 of the motor mounting leg 4, and then tighten the flange 4c of the motor mounting leg 4 from the outside of the cylindrical body 8 with the tightening screw 9. Each power supply lead 14 is pulled out from the two draw-out holes formed by joining the cylindrical bodies 8 to each other, and the cylindrical bodies 8 are connected to each other by tightening the tightening screw 9 to the flange by one inch. The tubes are connected together to form a straight tube-shaped main body 1. The two axial flow impellers 2 each face the bell mouth portions 6 at both ends of the main body 1, and can be attached and detached by operation from the open end of the main body 1. Therefore, maintenance such as cleaning can be performed extremely easily. Further, the main body 1 can be molded from resin and reinforced by the integral reinforcing ribs 10, so that strength can be ensured without increasing the wall thickness.

[Effects of the Invention] As described above, according to the counter-rotating ventilation system of the present invention,
Since the main body is split in the axial direction, it is easy to mold the main body with resin due to the short axial dimension, and the number of parts is reduced because each drive motor is attached by a single motor mounting leg. It is easy to obtain concentricity of the drive motor and axial flow impeller, and the ease of assembly is improved. Furthermore, since each axial flow impeller faces each open end of the main body, they can be cleaned by being attached and removed from each open end of the main body, and maintainability is also improved.

According to another counter-rotating ventilation device according to the present invention,
In particular, since the joint portion of the cylinder is formed by the mutual engagement of the protrusions and the grooves, the airtightness of the portion can be maintained at a high level.

Furthermore, according to another counter-rotating ventilation device of the present invention, the power lead of the drive motor can be temporarily fixed in the notch of the motor mounting leg, making it easy to pull out the power lead, and Improves ease of assembly.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view of a counter-rotating type ventilation device showing an embodiment of the present invention, and Fig. 2 is a longitudinal sectional view showing the joint structure of the main body.
lIWfr side view, Figure 3 is an exploded perspective view showing the motor mounting leg and drive motor to the cylinder, Figure 4 is a perspective view of the cylinder showing the structure of the cylinder, and Figure 5 is the motor attachment to the cylinder. FIG. 6 is an exploded perspective view showing the relationship between the legs and the power supply lead of the drive motor, and FIG. 6 is a vertical cross-sectional view showing a conventional counter-rotating ventilation system with some parts omitted. In the figure, 1 is the main body, 2 is the axial flow impeller, 3 is the drive morph, 4 is the motor mounting leg, 4C is the flange, 6 is the bell mouth part, 7
1 is a joint flange portion, 8 is a cylinder, 9 is a tightening screw, 11 is a protrusion, 12 is a groove, 13.15 is a notch, and 14 is a power supply lead. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (3)

[Claims] (1) A counter-rotating ventilation device in which a pair of axial flow impellers and a drive motor for rotationally driving the impellers are arranged in series in a cylindrical main body, and the two axial flow impellers are rotated in opposite directions. , the pair of drive motors are mounted on a single motor mounting leg so that their anti-rotation shaft sides face each other, and the main body has a bell mouth portion at one end and a joining flange portion at the other end. The motor mounting legs are attached so as to straddle the joints of the main body, and the cylinders are joined at the joint flange by attaching the motor mounting legs. This is a counter-rotating type ventilation system. (2) A protrusion is formed on approximately half of the circumference of the joint surface of the joint flange portion of each cylinder, and a groove into which the protrusion can fit is formed on the remaining half. 2. The counter-rotating ventilation system according to claim 1. (3) The motor mounting leg is configured in an I-shape with U-shaped members facing each other and joined together, and the power lead of the drive motor is temporarily fixed to the flange that connects to the main body. 2. The counter-rotating ventilation device according to claim 1, further comprising a notch.