JPH0236023Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a damper opening/closing device for an air supply duct, which is equipped with a damper for adjusting air volume.

[Conventional technology]

Conventionally, conditioned air whose temperature and humidity have been adjusted and purified by an air conditioner is sent into an air duct by a blower, the flow rate is adjusted by a damper in the duct, and the air is sent indoors through an air outlet installed on the ceiling or wall. In this case, the flow rate was adjusted by entering the ceiling and directly opening and closing a damper in the air duct.

[Problem that the invention attempts to solve]

However, it is extremely troublesome to enter the ceiling and open and close the damper each time the conditioned air amount is adjusted. In addition, air supply leakage and dust were sucked in from the damper shaft insertion part, etc.

Therefore, this invention does not penetrate into the ceiling,
It is an object of the present invention to provide a damper opening/closing device for an air supply duct which can open and close a damper of an air supply duct by remote control indoors, and which also prevents air leakage and suction of dust. .

[Means for solving problems]

In order to achieve the above object, the air duct damper opening/closing device of the present invention is equipped with a damper for adjusting air volume that rotates around a damper shaft near the outlet of the air duct installed in the ceiling. In the air duct,
one end of the damper shaft protrudes outside the air supply duct, one end of the opening/closing shaft is engaged with the protruding end of the damper shaft, and the other end of the opening/closing shaft is rotatably supported on a ceiling plate; Further, the damper shaft insertion portion of the air supply duct and the opening/closing shaft support of the ceiling plate are sealed with a sealing device such as an O-ring.

[Effect]

Therefore, when the opening/closing shaft supported on the ceiling board is rotated from inside the room, the damper shaft is rotated thereby to open/close the damper and adjust the amount of air supplied.
In addition, the sealing device provided at the damper shaft insertion portion and the opening/closing shaft support of the ceiling plate can prevent air leakage and suction of dust.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

First, in FIGS. 1 to 3, air conditioned by an air conditioner (not shown) is sent to an air supply duct 3 piped into a space 2 in a ceiling 1 by a blower (not shown). The amount of air is adjusted by a damper 4 provided in the outlet pipe 3a of the duct 3, and the air is sent from the side of the unit case 5 into the chamber 6 of the unit case 5. The conditioned air that has been muffled and rectified in the chamber 6 is filtered by an air filter 7 at the bottom of the chamber 6, and then a large number of blowout panels 9 are connected to the bottom of the unit case 5 and protrude from one side of the ceiling into the room 8. Air is blown into the chamber 8 from the blow-off hole 9a.

This blowout panel 9 is made of punched metal formed into a trapezoid, and the punched holes are used as blowout holes 9a.
The flange 9b on the outer periphery of the upper side is locked with the locking frame 10,
This locking frame 10 is attached to a mounting frame 11 that engages with the lower end of the unit case 5.

A damper 4 provided in the outlet pipe 3a of the air supply duct 3
rotates around the damper shaft 12 as a fulcrum,
One end 12a of the damper shaft 12 is made to protrude toward the side of the air supply duct 3, the insertion portion is sealed with an O-ring 13, etc., a pinion gear (not shown) is attached to the shaft, and the shaft end is supported by a support plate 14. There is.

A vertical opening/closing shaft 1 that rotates the damper shaft 12
5 is a worm shaft 1 having a worm (not shown) on the upper part that meshes with a pinion gear of the damper shaft 12;
6 and the mounting frame 1 connected to the lower end of the unit case 5.
It is formed by a rod 18 inserted into a bearing 17 provided at 1 and a flexible shaft 19 connecting these rods. Note that 20 is a cover such as a vinyl tube that covers the flexible shaft 19.

The worm shaft 16 is supported by the support plate 14 and interlocks the worm with the pinion gear of the damper shaft 12.

Two fitting grooves are provided around the shaft portion 18a of the rod 18, O-rings 21 and 22 are fitted into the fitting grooves, and a flange portion 18b is formed below the flange portion 18b. A slit 18 into which a tool such as a screwdriver for rotating the rod is inserted into the lower surface of the portion 18c.
d is formed.

Both ends of the flexible shaft 19 connecting the worm shaft 16 and the rod 18 are formed into a square shape.
One end is fitted into the worm shaft 16 and the other end is fitted into the rod 18, respectively, and is prevented from coming off by screws 23 and 24.

Bearing 1 that supports the rod 18 of the opening/closing shaft 15
7 consists of a main body 17a and a cover part 17b,
A shaft hole 17c into which the rod 8 is rotatably inserted is formed in both of them. and,
These main body 17a and cover part 17b are connected by bolts 2
5 and 25, and the space between them is sealed by an O-ring 26 that fits into a groove 17d formed in the main body 17a, and is attached to the mounting frame 11 joined to the lower end of the unit case 5. Incidentally, it is preferable to apply grease to this groove 17d in order to prevent the rod 18 from rusting and to ensure smooth rotation.

To support the rod 18 on this bearing 17, remove the screw 24, insert the rod 18 into the shaft hole 17c from below the bearing 17, and then attach the ring 27 to the shaft portion 18a of the rod 18 that protrudes upward. After the flexible shaft 19 is inserted into the rod 18 from above, the flexible shaft 19 and the rod 18 are connected with the screw 24.

When the rod 18 is supported on the bearing 17 in this way, the O-rings 21 and 2 are connected between the bearing 17 and the rod 18.
2 is sealed. Also, the rod 18 has a flange 18.
The ring 27 and screw 2 prevent it from coming off upwards with b.
4 prevents it from coming off downward.

In addition, 28 is hole 1 into which a tool such as a screwdriver is inserted.
This is a dustproof grommet that closes 0a. When adjusting the supply amount of conditioned air, remove the grommet 28 from the hole 10a, apply a tool such as a screwdriver to the slit 18d of the cylindrical part 18c at the bottom of the rod 18, rotate the opening/closing shaft 15, and then remove the grommet 28 from the hole 10a. 4
All you have to do is open and close it.

In this embodiment, the air supply duct 3 is installed in the unit case 5.
Although the case where it is attached to the side is shown, since the opening/closing shaft 15 is made flexible, it can also be applied when the air supply duct is connected to the chamber 6 from the top of the unit case, as shown in Fig. 4. .

Further, in the above embodiment, a flexible shaft 19 is connected between the worm shaft 16 and the rod 18 of the opening/closing shaft.
Since the connection is made with
Production costs and labor costs can be reduced.

[Effect of idea]

As described above, the present invention projects one end of the damper shaft to the outside of the air duct, engages one end of the opening/closing shaft with the protruding end of the damper shaft, and connects the other end of the opening/closing shaft to the ceiling plate. Since it is rotatably supported, the amount of conditioned air can be adjusted without entering the ceiling.
It can be easily performed indoors by remote control, and the damper shaft insertion part of the air duct and the opening/closing shaft support of the ceiling plate are sealed with a sealing device such as an O-ring.
Not only can leakage into the ceiling be blocked to make effective use of conditioned air, but dust in the ceiling can also be prevented from being sucked in, ensuring clean conditioned air at all times, especially in rooms where precision machinery parts and pharmaceutical products are manufactured. Suitable for supplying air to hospitals and hospital rooms.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the present invention, in which Figure 1 is a partially sectional front view, Figure 2 is a side view showing how the opening/closing shaft and the damper shaft are installed, and Figure 3 is FIG. 4 is a front view showing the mounting state of the opening/closing shaft and the bearing, and FIG. 4 is a partially sectional front view showing another embodiment of the present invention. 3... Air supply duct, 3a... Outlet pipe, 4... Damper, 5... Unit case, 6... Chamber,
7... Air filter, 8... Chamber, 12... Damper shaft, 12a... One end of damper shaft, 13... O-ring, 14... Support plate, 15... Opening/closing shaft, 16...
Worm shaft, 17... Bearing, 18... Rod, 1
9...Flexible shaft, 21, 22, 26
...O-ring, 23, 24...screw, 25...bolt, 27...ring, 28...grommet.

Claims (1)

[Scope of utility model registration request] In an air duct equipped with a damper for adjusting air volume that rotates around a damper shaft near the outlet of the air duct disposed in the ceiling, one end of the damper shaft protrudes outside the air duct. one end of the opening/closing shaft is engaged with the protruding end of the damper shaft, the other end of the opening/closing shaft is rotatably supported on the ceiling plate, and the damper shaft insertion portion of the air supply duct is connected to the ceiling. A damper opening/closing device for an air supply duct, characterized in that an opening/closing shaft of a plate is sealed with a sealing device such as an O-ring.