JPH0363440A - Counter rotating fan type ventilator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

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. 4 is a sectional view showing a conventional counter-rotating type ventilation device disclosed in, for example, Japanese Patent Publication No. 61-4895. That is, this counter-rotating type ventilation system has an axial flow impeller 21 and a drive motor 22 that rotates the axial flow impeller 21 arranged in series on the center line of a straight pipe-shaped main body 20 having flanges at both ends. They are arranged so that they face each other. - A set of axial flow impeller 21 and drive motor 22 is connected to the main body 20 by one motor mounting leg 23, and another set of axial flow impeller 21 and drive motor 22 is connected to the main body 20 by separate motor mounting leg 24. installed.

In the counter-rotating ventilation system described above, the two axial flow impellers 21 rotated by the respective drive motors 22 rotate in opposite directions, but the air blowing direction is unidirectional as shown by the arrow in the figure.

As shown in FIG. 5, the main body 20 is mounted by connecting a hanging bolt 27 hanging from the ceiling 26 to a hanging metal fitting 25 attached to the axial center of the main body 20, and fixing it with a nut. In the figure, 28 is a ventilation duct.

[Problems to be Solved by the Invention] In the conventional contra-rotating type ventilation system, each axial flow impeller 21 is located between two sets of drive motors 22, and the axial flow impeller 2
The part where 1 is located corresponds to the axial middle part of the main body 20, and in order to suspend and fix the main body 20 at the axial middle part of the main body 20 with good balance, the strength of the main body 20 itself must be set high. There is a need. If the drive motor 22 is hung and fixed at the position corresponding to the motor mounting legs 23 and 24, the strength of the main body 20 does not need to be that high. If it is hung and fixed, it tends to become unstable.

In addition, since each drive motor 22 is attached to the main body 20 using motor mounting legs 23 and 24, there are many parts and it is difficult to ensure concentricity. This includes problems to be solved, such as the need to remove the motor 22.

This invention was made to solve the conventional problems, and is particularly suitable for small-sized devices, has a small number of parts, is easy to assemble and maintain, and is a counter-rotating type that is easy to hang and fix using hanging bolts. The purpose is to obtain ventilation equipment.

[Means for Solving the Problems] A counter-rotating type ventilation device according to the present invention includes a pair of drive motors in a cylindrical main body such that their counter-rotating shaft sides are opposed to each other by a single motor mounting leg. Install it in the opposite direction,
The motor mounting legs are attached to the main body by fastening a hanging fitting from the outside of the main body to suspend and fix the entire motor mounting leg to the flange.

Further, in another counter-rotating type ventilation device according to the present invention, the motor mounting leg is configured in a single-shape in which members having U-shaped ends are opposed and connected, and the hanging fitting is formed in a substantially Z-shape. However, this hanging fitting can be attached and changed to a symmetrical position when viewed from the axial direction.

[Function] In the counter-rotating ventilation system of the present invention, each drive motor is attached by a single motor mounting leg, so the number of parts is reduced, and concentricity of the drive motor and axial flow impeller can be easily achieved. , 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.

Then, the hanging bracket is fastened to the flange of the motor mounting leg,
Since the main body is sandwiched between the hanging fitting and the flange of the motor mounting leg, even if the strength of the main body is not very high, the whole can be suspended and fixed by connecting the hanging bolt to the hanging fitting.

In addition, in other counter-rotating type ventilation devices of the present invention, the work direction when hanging and fixing can be done from one direction, especially with respect to the intake and exhaust direction, and the hanging fittings can be attached by changing the direction. Even when the direction is reversed, the work of hanging and fixing can be performed from the opening direction without changing the direction of work.

[Embodiment] Figs. 1 to 3 all show an embodiment of the 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 in opposite directions so that their sides opposite to the rotational shafts face each other, and are fixed with screws 5. In the motor group to which the drive motor 3 is fixed, the leg 4 is fitted into the center of the main body 1 so that the arc-shaped flange 4c formed at the free end of the leg portion 4b comes into contact with the inner circumferential surface of the main body 1, A tightening screw 6 is tightened and fixed to the flange 4C from the outside of the main body 1. 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.

More specifically, as shown in FIGS. 2 and 3, the motor mounting leg 4 is configured in an I-shape in which members having U-shaped end faces are joined together, and a cylindrical holding portion is provided in the center of the leg. 4a is formed. Flanges 4c extending in an arc shape on the left and right sides of the leg portions 4b are formed on each free end side of the leg portions 4b that protrude in opposite directions from the holding portion 4a. A hanging fitting 7 for suspending and fixing the entire flange 4C on either the left or right side of the flange 4C is screwed from the outside of the main body 1 with a tightening screw 6. The hanging fitting 7 is
The end face shape is formed in a substantially Z shape, and one flange 7a that abuts against the main body 1 is formed in an arc shape along the main body 1,
The other flange 7b has a hanging bolt 8 hanging from the ceiling.
A through hole is drilled through which it is inserted. The main body 1 is sandwiched between the arc-shaped flange 7a and the flange 4C of the motor mounting leg 4 so as to be separated by 1 inch, and the entire body is suspended and fixed by tightening the nut 9 to the hanging bolt 8. The entire load is carried by the suspension bolt 8 via the motor mounting leg 4 and the suspension fitting 7.
Since the strength of the main body 1 does not need to be very high, this hanging structure is particularly effective for small models. Moreover, since each drive motor 3 is provided in the center of the main body 1 by one motor mounting leg 4, it can be suspended and fixed by one hanging bolt 8 in a well-balanced manner. The hanging bracket 7 is shown in Figures 2 and 3.
As shown in the figure, the mounting position can be changed to a symmetrical position when viewed from the axial direction, and the nut 9 can be easily tightened by selecting the one that is easy to install.Even if the air blowing direction is reversed, , the work of hanging and fixing can be performed from the same direction without changing the direction in which the Nand 9 is tightened. The two axial flow impellers 2 face open ends at both ends of the main body 1, and can be attached and detached by operations from the open ends of the main body 1. Therefore, maintenance such as cleaning can be performed extremely easily from the open end of the main body 1 without any hindrance. Furthermore, since the drive motor 3 is attached to one motor mounting m4, the concentricity of the drive motor 3 and the axial flow impeller 2 can be easily achieved, and the ease of assembly is also improved.

[Effects of the Invention] As described above, according to the counter-rotating ventilation system of the present invention,
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. moreover,
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. The hanging bracket is fastened to the flange of the motor mounting leg, and the main body is sandwiched between the hanging bracket and the flange of the motor mounting leg, so even if the strength of the main body is not very high, you can connect the hanging bolt to the hanging bracket to secure the entire body. It can be hung and fixed in a well-balanced manner.

According to another counter-rotating ventilation device according to the present invention,
In particular, it is possible to work from one direction when fixing the hanging to the intake/exhaust direction, and by changing the direction of installing the hanging bracket, even when the air blowing direction is reversed.
Hanging and fixing work can be performed from the same direction without changing the direction of work.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view of a counter-rotating ventilation system showing an embodiment of the present invention, Fig. 2 is an exploded perspective view showing the relationship between the hanging bracket, motor mounting legs, and drive motor, and Fig. 3 is an exploded perspective view showing the relationship between the hanging fittings, motor mounting legs, and drive motor. Fig. 4 is an exploded perspective view showing the relationship between the hanging fitting, the motor mounting leg, and the drive motor with the mounting position of the fitting changed; FIG. 5 is an explanatory diagram showing the same conventional counter-rotating ventilation system in an installed state. In the figure, 1 is the main body, 2 is an axial flow impeller, 3 is a drive motor, 4 is a motor mounting leg, 4c is a flange, 6 is a tightening screw, 7 is a hanging metal fitting, 7a is a flange, 8 is a hanging bolt, 9 is Natsuto. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (2)

[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 above pair of drive motors are mounted in opposite directions on a single motor mounting leg so that their non-rotating shaft sides face each other, and the whole is suspended and fixed to the flange for mounting the motor mounting leg to the above body. A counter-rotating type ventilation device, characterized in that a hanging fitting is fastened from the outside of the main body. (2) The motor mounting leg is configured in an I-shape with U-shaped end faces facing each other and joined together, and the hanging bracket is formed in a substantially Z-shape, and the hanging bracket is symmetrical when viewed from the axial direction. 2. The counter-rotating ventilation system according to claim 1, wherein the counter-rotating ventilation system can be changed in position.