JPH055544A - Duct ventilation fan - Google Patents

Abstract

PURPOSE:To reduce pressure loss of a duct and reduce cost by a method wherein a main body casing is formed ink a cylinder and a base member is provided with an arcular fixing hole having a center of the main body casing. CONSTITUTION:A main body casing 4 is fixed to a base member 2 with small screws and the main body casing 4 is mounted on a fixing frame 1 while it is being fixed to the base member 2. The main body casing 4 is rotated together with the base member 2. The base member 2 is fixed to the fixing frame 1 at a predetermined angle through utilization of fixing holes 20 at an angular position where a connecting cylinder 17 is directed toward an appropriate direction without the duct 10 being excessively bent. A fan 7 is rotated and indoor air sucked through a suction panel 13 is discharged from an outdoor hood 31 through the duct 10 and then ventilation is performed. In this case, the duct 10 is not bent excessively and a length of the duct 10 is short, so that duct pressure loss is not increased and the cost of the duct piping can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a duct ventilation fan that is attached to a mounting frame that supports a field edge that forms the ceiling of a building and is installed on the back of a ceiling or the like. The main body casing includes a base member and a main body casing attached to the base member. A fan and a fan motor are provided in the main body casing, and a suction port communicating with the opening is provided on a side of the base member attached to the main body casing. The present invention relates to a ventilation fan for a duct, which has a connection portion to the duct on the side surface of the.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 6, a casing A of a ventilation fan for a duct installed on the ceiling of a building is formed in a rectangular parallelepiped shape, and a fan (not shown) is installed inside the casing. , A connection cylinder B is provided on one side surface thereof, duct piping is performed using this connection cylinder B, and the air in the room is sucked from a suction panel C connected to the lower portion of the casing A by the operation of the fan, and the connection is performed. Ventilation is carried out to the outside through a duct connected to the cylinder B.

[0003]

However, in order to install a duct ventilation fan in one corner of the ceiling, for example, as shown in FIG. 5, the casing A is fixed to a field edge forming the ceiling. When the duct E is supported between the connecting cylinder B of the casing A and the outdoor hood D provided on the outside of the side wall of the building while being supported by a frame or the like, the casing A is supported by the mounting frame and the connecting cylinder. Since the direction of B can only be changed at an angle of 90 degrees, the three faces of the casing A face the side wall of the building as shown in FIG. When the duct E cannot be connected due to the small distance from the wall of the building, the duct E is connected by directing the connecting cylinder B to the open surface, but as shown in FIG. If there is an obstacle F in front of the side face, the solid line As shown, the duct E is bent excessively to avoid the pipe obstacle F, and as shown by the dotted line, the duct E is lengthened to bypass the pipe obstacle F without extreme bending of the duct E. It has to be.
Therefore, if the duct E is bent excessively or is held, the length of the duct becomes long, and the duct pressure loss increases by that amount, so that the performance of the duct ventilation fan cannot be fully exerted.
Moreover, there is a problem that the cost of duct piping cannot be reduced.

Therefore, an object of the present invention is to improve the degree of freedom in the plane of the connection to the duct of the ventilation fan for ducts installed on the ceiling or the like, and to avoid the extreme bending of the duct in order to avoid piping obstacles. In addition, the length of the duct can be shortened, the pressure loss of the duct can be reduced, the performance of the ventilation fan for the duct can be sufficiently exhibited, and the cost of the duct piping can be reduced.

[0005]

To achieve the above object, the present invention provides a base member 2 having an opening 5 to be mounted on a mounting frame 1, and a main casing 4 mounted on the base member 2.
And a fan 7 and a fan motor 8 are housed in the main body casing 4, a suction port 9 communicating with the opening 5 is provided on a mounting side of the base member 2, and a side surface of the main body casing 4 is provided. A duct ventilation fan provided with a connecting portion 11 to a duct 10, wherein the main body casing 4 has a cylindrical shape, and the base member 2 is provided with an arcuate mounting hole 20 having a center 19 of the main body casing 4 as a center. It was.

Further, it is preferable that the arcuate mounting hole 20 provided in the base member 2 is a mounting hole of the base member 2 to the mounting frame 1.

Further, it is preferable that the arcuate mounting hole 20 provided in the base member 2 is a mounting hole for the main body casing 4 of the base member 2.

[0008]

When the duct ventilation fan is installed on the ceiling and the duct 10 is connected to the connecting portion 11, the mounting hole 20 is provided.
The main body casing 4 can be freely rotated with respect to the mounting frame 1 and the base member 2 fixed to the mounting frame 1, and the direction of the connecting portion 11 can be arbitrarily oriented in the entire circumferential direction. Of. For this reason, it is possible to improve the planar freedom of the connecting portion 11, and therefore, it is possible to bend the duct 10 extremely and avoid duct obstructions without lengthening the duct 10 to form the duct pipe. The duct pressure loss due to bending or lengthening can be reduced compared to the conventional example. As a result, the performance of the duct ventilation fan can be fully exerted, and the cost of duct piping can be reduced.

Further, when the arcuate mounting hole 20 provided in the base member 2 is used as a mounting hole for mounting to the mounting frame 1, with the main body casing 4 mounted on the base member 2,
Since the base member 2 is attached at a predetermined angle position with respect to the attachment frame 1, the main body casing 4 is attached to the base member 2.
At the same time, the angle of the connecting portion 11 can be adjusted with respect to the mounting frame 1 for easy mounting.

Further, when the mounting hole 20 of the base member 2 is to be mounted on the main body casing 4, the base member 2 should be fixed to the mounting frame 1 and then only the main body casing 4 should be rotated. Therefore, the angle fine adjustment of the direction of the connecting portion 11 can be easily performed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The duct ventilation fan shown in FIGS.
Cross-shaped mounting frame 1 that is fixed to the field edge that forms the ceiling of the building
The base member 2 is attached to the mounting frame 1, and the main body casing 4 has a body 3 to be attached to the base member 2. The base member 2 has an opening at the center thereof. A part 5 is provided. Further, the body 3 of the main body casing 4 is internally provided with a fan 7 surrounded by a fan casing 6 made of expanded polystyrene and a fan motor 8 for rotating the fan 7, and a mounting side of the body 3 to the base member 2 is attached. While a suction port 9 communicating with the opening 5 provided in the base member 2 is provided in the body 3, the body 3 is provided with a connection 1 to a duct 10.
1, the air sucked from the room through the suction port 9 by the rotation of the fan motor 8 is discharged to the outside through the duct 10 to ventilate the room.

Reference numeral 12 is a bell mouth provided near the suction port 9, and 13 is a suction panel attached to the mounting frame 1.

Therefore, the main body casing 4 is formed of the cylindrical body 3 and the lid 14 provided on the upper end side of the body 3, and the lower end side end portion of the body 3 is opened to open the opening. 5 is formed in a circular shape, and a flange 15 is formed on the outer periphery of the lower end of the body 3 so as to project radially outward.
The flange 15 is provided with four round hole-shaped screw holes 16 on the same circumference so that the screw holes 16 can be used when the main body casing 4 is fixed to the base member 2.
Further, the connecting portion 11 is provided at the middle portion in the height direction of the body 3.
Is attached in close contact with one side surface of the connecting portion 11, and the connecting tube 17 is connected to the duct 10 that is horizontally piped.
In addition, the inside of the connecting portion 11 and the inside of the main body casing 4 are made to communicate with each other via the communication port 18 provided in the body 3.

Further, the base member 2 is formed in an annular plate shape having an outer diameter larger than the flange 15 and an inner diameter slightly larger than the outer diameter of the body 3, and the base member 2 is provided with the main body casing. 4 is provided with an arc-shaped mounting hole 20 centered on the center 19 and a round hole-shaped screw hole 21 is provided closer to the center side than the mounting hole 20, and when the body 3 is solidified on the base member 2, Center 19 of body casing 4
Are concentrically overlapped with each other so that the centers of the base members 2 coincide with each other in plan view. At this time, the screw holes 16 provided in the flange 15 and the screw holes 21 provided in the base member 2 are The opening 5 and the suction port 9 are overlapped with each other so as to communicate with each other, and the mounting hole 20 provided in the base member 2 is exposed outward in the radial direction from the outer peripheral edge of the collar 15.

Next, as shown in FIG. 4, a case where the duct ventilation fan is arranged at one corner of the ceiling ceiling having a complicated planar shape will be described.

First, the main body casing 4 is screwed to the base member 2 through the screw holes 16 and 21, and then,
As shown in FIG. 2, the main body casing 4 is mounted on the mounting frame 1 fixed to the base edge of the base member 2, and the main body casing 4 is rotated together with the base member 2 with respect to the mounting frame 1. The base member 2 is attached to the mounting frame 1 at a predetermined angular position, that is, as shown by a solid line or a dotted line in FIG.
The mounting hole 20 is used to mount the connection cylinder 17 at an angular position where the connection cylinder 17 faces in an appropriate direction where piping can be avoided. Then, by driving the fan motor 8, the fan 7 is rotated, and the indoor air sucked from the suction panel 13 through the suction port 9 and the bell mouth 12 is
Air is exhausted from the outdoor hood 31 to the outside through the duct 10 connected to the connecting tube 17, and the air in the room is ventilated. For example, as shown in FIG. 4, the duct 10 is not extremely bent, Further, since the length of the duct 10 is shorter than that in FIG. 5, the duct pressure loss does not increase and the cost of the duct piping can be reduced.

Therefore, when the duct ventilation fan is installed in a corner of the ceiling and the duct 10 is connected to the connecting cylinder 17, the direction of the connecting portion 11 attached to the body 3 is freely set with respect to the mounting frame 1. Since it can be rotated in any direction, the direction of the connecting cylinder 17 provided in the connecting portion 11 can be arbitrarily oriented in the entire circumferential direction, and the degree of freedom in plane in the duct pipe can be improved. As described above, the duct 10 can be installed without being bent extremely. As a result, since the duct pressure loss does not increase, the performance of the duct ventilation fan can be sufficiently exhibited, and the cost of the duct piping can be reduced.

Further, in the above embodiment, since the arcuate mounting hole 20 provided in the base member 2 is used as the mounting hole for the mounting frame 1 of the base member 2, the main casing 4 is mounted on the base member 2. In this state, the base member 2 can be mounted at a predetermined angle position with respect to the mounting frame 1, and the main body casing 4 together with the base member 2 can be easily mounted on the mounting frame 1 by adjusting the angle of the connecting portion 11. You can

Further, in the above embodiment, the arcuate mounting hole 20 provided in the base member 20 is used as the mounting hole for the mounting frame 1 of the base member 2, but the base member 2 is provided with the main casing 4. The mounting hole to be mounted on may be formed in an arc shape. In this case, after fixing the base member 2 to the mounting frame 1, only the main body casing 4 is rotated so that the direction of the connecting portion 11, that is, The connection tube 1
Since the direction of 7 can be arbitrarily oriented in the entire circumferential direction,
The angle of the direction of the connecting tube 17 can be finely adjusted easily.

In the above embodiment, the base member 2 is used.
Is formed in an annular plate shape having an outer diameter larger than the flange 15 and an inner diameter slightly larger than the outer diameter of the body 3, but the outer diameter shape may not be circular, and the central portion may be The opening 5 communicating with the suction port 9 of the main body casing 4 may be provided.

[0021]

As described above, according to the present invention, the base member 2 having the opening 5 attached to the attachment frame 1 and the main body casing 4 attached to the base member 2 are provided.
A fan 7 and a fan motor 8 are housed in the main body casing 4, a suction port 9 communicating with the opening 5 is provided on the mounting side to the base member 2, and the main body casing 4
In a duct ventilation fan having a connecting portion 11 to the duct 10 on its side surface, the main body casing 4 has a cylindrical shape, and the base member 2 includes a center 19 of the main body casing 4.
Since the arc-shaped mounting hole 20 having the center is provided, when the duct ventilation fan is installed on the back of the ceiling and the duct 10 is connected to the connecting portion 11, the mounting hole 20 is used to connect the body casing 4 to the main casing 4. Since it can be freely rotated with respect to the mounting frame 1 and the base member 2 fixed to the mounting frame 1, the direction of the connecting portion 11 can be arbitrarily oriented in the entire circumferential direction. The degree of freedom of the plane 11 can be improved.

Accordingly, it is possible to bend the duct 10 extremely and avoid duct obstructions without lengthening it, and to reduce duct pressure loss due to extreme bending or lengthening of the duct 10. It can be reduced compared to the example. As a result, the performance of the duct ventilation fan can be fully exerted, and the cost of duct piping can be reduced.

Further, when the arcuate mounting hole 20 provided in the base member 2 is used as a mounting hole for mounting the base member 2 to the mounting frame 1, the base member 2 is provided with a main casing 4.
Since the base member 2 can be mounted at a predetermined angular position with respect to the mounting frame 1 in the state where the
Can be easily attached to the mounting frame 1 together with the base member 2 by adjusting the angle of the connecting portion 11.

Further, when the arcuate mounting hole 20 provided in the base member 2 is used as the mounting hole of the base member 2 to the main body casing 4, only the main body casing 4 can be rotated, so that the connecting portion is The angle fine adjustment of the direction of 11 can be easily performed.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a duct ventilation fan according to the present invention.

FIG. 2 is a top view of FIG.

3 is an exploded perspective view of the duct ventilation fan shown in FIGS. 1 and 2. FIG.

FIG. 4 is a duct piping diagram in which the duct ventilation fan shown in FIGS. 1 and 2 is installed behind the ceiling.

FIG. 5 is a duct piping diagram in which a conventional duct ventilation fan is installed behind the ceiling.

6 is a perspective view of the duct ventilation fan of FIG. 5. FIG.

[Explanation of symbols]

 1 Mounting Frame 2 Base Member 4 Main Body Casing 5 Opening 7 Fan 8 Fan Motor 9 Suction Port 10 Duct 11 Connection Member 19 Center 20 Mounting Hole

Claims (1)

Claim: What is claimed is: 1. A base member 2 having an opening 5 for mounting to a mounting frame 1, and a main body casing 4 for mounting to the base member 2, wherein a fan 7 and a fan motor are mounted on the main body casing 4. 8, a suction port 9 communicating with the opening 5 is provided on the side of attachment to the base member 2, and a connecting portion 11 to a duct 10 is provided on a side surface of the main body casing 4.
In the ventilation fan for a duct, the main body casing 4 has a cylindrical shape, and the base member 2 is provided with an arc-shaped mounting hole 20 centered on a center 19 of the main body casing 4. Ventilation fan for duct. 2. An arc-shaped mounting hole 2 provided in the base member 2.
The ventilation fan for duct according to claim 1, wherein 0 is a mounting hole of the base member 2 to the mounting frame 1. 3. An arc-shaped mounting hole 2 provided in the base member 2.
The duct ventilation fan according to claim 1, wherein 0 is a mounting hole of the base member 2 to the main body casing 4.