JPH0658181B2 - Suction grill air flow controller - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction grill attached to a ceiling surface or a wall surface for indoor ventilation.

2. Description of the Related Art Generally, a suction grill is installed as an air inlet / outlet for ventilation in a room, but if an intermediate duct fan is installed in the ceiling and the suction grill is installed at the tip of the intake grill, the There has been a strong demand for a device capable of surely adjusting the suction air volume of a duct fan in a place other than the main body.

For this reason, as shown in FIGS. 3 and 4, the conventional suction grille air volume adjusting device has two disk-shaped plates for closing the ventilation port, that is, 1 has a notch. Moreover, the fixed air flow rate adjusting plates 11 and 1 fixed to the exhaust port also have notches, and a movable air flow rate adjusting plate 12 that rotates on a plane is provided, and switching is performed by rotating the movable air flow rate adjusting plate 12. The air volume was adjusted by changing the opening area 13 of the part.

Problems to be Solved by the Invention In such a conventional configuration, the opening area is adjusted by aligning the cutouts of the fixed air volume adjusting plate 11 and the movable air volume adjusting plate 12, but the opening is achieved by completely aligning the notches. The maximum area is 50% of the cross-sectional area of the ventilation port.
Since it only opens the door, and the resistance to the ventilation air volume becomes large, it is necessary to increase the diameter of the ventilation port or improve the performance of the intermediate duct fan in order to secure the required ventilation volume, which increases the equipment cost. However, there is a problem that the workability is significantly deteriorated.

The present invention is to solve the above-mentioned problems, and significantly reduces the resistance to ventilation air volume when the opening area of the ventilation opening is maximized, and at the same time, provides a suction grill air volume adjustment device that is easy to operate. It is intended to be provided.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention has a knob that rotates at the center of a louver facing the inside of the room, and an adjusting screw that forms a male screw connected to the knob, A movable member that is screwed onto the adjusting screw and moves up and down on the adjusting screw, and a movable member that is provided inside a tubular duct connection body that is connected to the louver.
Both sides are pivotally supported by a pair of rotation support shafts to open and close the ventilation passage of the duct connection body, and a groove formed integrally with the left and right sides of the movable member so that a protruding pin is slidably fitted therein is provided in the rotation support shaft. And an air flow rate adjusting device for a suction grill, wherein the pin comprises a two-piece shutter provided in a direction orthogonal to the axis, and the pin has a dimension between its two ends that is larger than the distance between the adjacent rotary support shafts. It was done.

Operation With the above-described configuration, the present invention can open and close the shutter by simply turning the knob, and since the maximum opening area of the ventilation opening is the entire ventilation opening area excluding the shutter thickness area, operability is improved. It is possible to greatly improve and greatly reduce the ventilation resistance.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

In the figure, 1 is a louver which is mounted facing the room, and 10
Is a cylindrical duct connection body connected to this. The duct connection body 10 has a support member 11 in part, and a knob 2 is rotatably provided so as to be located at the center of the louver 1. An adjusting screw 3 having a male thread formed of a multi-threaded screw is coupled to the knob 2, and the adjusting screw 3 is positioned at the center of the duct connection body 10. A movable member 4 having a female screw is screwed onto the adjusting screw 3, and the movable member 4 integrally has a pair of pins 9 and 9 located on both sides.
Two pairs of rotation supporting shafts 7 are provided on the inside of the duct connection body 10, and both side portions near the straight sides of the two semi-circular disk-shaped shutters 5 and 6 are respectively provided on the rotation support shaft 7. The shutters 5 and 6 can be rotated by using the rotation support shaft 7 as a fulcrum. The shutters 5 and 6 are provided with a groove 8 having a wide inner depth in a direction perpendicular to the straight sides up to the outer peripheral portions of the shutters 5 and 6, and the movable member 4 is provided in the groove 8.
Pins 9, 9 are slidably engaged. 2
The dimension between the tips of the individual pins 9, 9 is formed to be larger than the distance between the two rotary support shafts 7, 7 arranged side by side.

When the knob 2 is rotated in the above configuration, the adjusting screw 3 connected to the knob 2 is rotated, and the movable member 4 is moved up and down in the drawing. When the movable member 4 moves up and down, the pin 9 protruding from the movable member 4 moves in the central groove 8 of the shutter 5 and the shutter 6 to rotate the shutter 5 and the shutter 6 about the rotation support shaft 7. When the movable member 4 moves upward, the shutters 5 and 6 are opened, and the movable member 4
When moves down, shutters 5 and 6 close. Since the dimension between the two pins 9 and 9 is larger than the distance between the rotary support shafts 7 and 7 which pivotally support the shutters 5 and 6 and are arranged adjacent to each other, the tips of the pins 9 and 9 are It is always located outside the rotation spindle 7, and when the shutters 5 and 6 are opened and closed,
The shutters 5 and 6 rotate smoothly without any phenomenon of being caught or stopped in the middle. Further, in the shutters 5 and 6, since the pins 9 and 9 provided integrally with the movable member that directly moves on the adjusting screw 3 are directly engaged with the grooves 8 and 8 of the shutters 5 and 6, the opening angle is determined. Even when the shutter is fully opened, the shutters 5 and 6 are tilted at substantially the same angle with respect to the adjusting screw 3 serving as the central axis. Therefore, even if the precision of each of these parts is not particularly increased, the shutter 5 is , 6 can be smoothly opened and closed, and since the shutters 5, 6 have the same inclination, there is no turbulence of the air flowing through them, and there is no increase in ventilation resistance or noise. Furthermore, when the shutters 5 and 6 are fully opened, the amount of air passing through the inside of the duct connection body 10 becomes maximum and the wind speed becomes the highest, but at that time, the pins 9 and 9 become the free ends of the shutters 5 and 6. The shutters 5 and 6 are firmly held without fluttering because they are positioned and engaged in the groove 8 near the outer peripheral portion.

As described above, according to the air volume adjusting device for the suction grille of the embodiment of the present invention, the opening and closing operations of the shutters 5 and 6 can be easily performed only by rotating the knob 2 from the indoor side. , It can be done smoothly without stopping in the middle, it does not disturb, the flow of air through the duct connection body is not disturbed, and the fluttering of the shutters 5 and 6 can be prevented, and the opening area is almost the ventilation port. Since it can be expanded to the area of the (duct connection body), the ventilation resistance can be greatly reduced, and when the shutters 5 and 6 are opened, the shutters 5 and 6 have two pairs of rotary support shafts 7, Since it is pivotally supported by 7, the opening is always made between the straight sides of the two shutters 5 and 6 regardless of the aperture ratio, and air also passes through this part to further reduce the ventilation resistance. Door can be.

EFFECTS OF THE INVENTION As is apparent from the above embodiments, according to the present invention, the shutter divided into two pieces is pivotally supported by the two pairs of rotation supporting shafts, and the shutter is rotated by the adjusting screw. Since the air volume is adjusted by opening and closing, the operation is easy and the aperture ratio can be greatly increased.
Since the openings between the straight sides of the shutters are also opened, the ventilation resistance can be made extremely small, and the air flowing through the central portion of the duct connection body is not repelled, and noise can be reduced. The two shutters are held at the same angle with respect to the adjusting screw that is the central axis of the duct connecting body, and the outer peripheral portion that is the free end is held by the pin even when the shutter is fully opened. During the opening and closing operation of the shutter, there is no increase in noise due to turbulence of the air flow or shutter fluttering, and the tips of the two pins are both outside the range between the adjacent rotation spindles. , Opening and closing operations can be performed smoothly without stopping during movement.

[Brief description of drawings]

FIG. 1 is a perspective view showing an air volume adjusting device for an intake grill according to an embodiment of the present invention, FIG. 2 is a sectional view of the same, FIG. 3 is a plan view of a conventional air volume adjusting device for a suction grill, and FIG. It is the same bottom view. 1 ... Louver, 2 ... Knob, 3 ... Adjustment screw, 4 ...
Movable member, 5, 6 ... Shutter, 7 ... Rotating spindle, 8
...... Groove, 9 ...... pin, 10 ...... duct connection body.

Claims (1)

[Claims] 1. A knob that rotates at the center of the louver facing the room, an adjusting screw having a male screw connected to the knob, and an adjusting screw that is screwed to the adjusting screw and moves up and down on the adjusting screw. And a movable member that moves to the louver, and two sides of each of which are pivotally supported by two pairs of rotation support shafts provided inside the tubular duct connection body connected to the louver to open and close the ventilation path of the duct connection body. Further, the movable member comprises two split type shutters which are provided integrally with the left and right sides of the movable member and have a groove into which a pin slidably fitted is provided in a direction orthogonal to the rotation support shaft, and the pin has both ends thereof. An air volume adjusting device for a suction grill, wherein a dimension between the two is larger than a distance between the adjacent rotation support shafts.