JPH0230671Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an inlet provided at the end of an air conditioning duct as part of air conditioning equipment in a building.

[Conventional technology and its problems]

For example, in a hotel, each guest room is equipped with a unit bath, and a suction port connected to a duct as an exhaust port for the toilet and bathroom is attached to the ceiling or the like.

A large number of these suction ports are provided for the duct,
On the other hand, about one fan is provided at the end of the duct. Therefore, there is a difference in the suction air volume between the suction port near the fan and the suction port far from the fan, so it is necessary to make adjustments to equalize this difference.

By the way, in the past, the opening area of the suction port was fixedly selected using blades, lids, etc., but this setting had to be done when the building was completed, which was extremely troublesome. . Also,
Depending on the device, the adjustment mechanism may be complicated, and the noise generated may be loud and harsh on the ears.

The purpose of the present invention is to solve the problems of the prior art and to provide an air conditioning suction port that automatically adjusts itself without any trouble, has a simple structure, and does not generate noise.

[Means for solving problems]

In order to achieve the above object, the present invention provides an adjustment plate that can be closed at a position perpendicular to the duct that forms the suction inlet, with one end pivoted, and the other end of the adjustment plate is installed inside the duct with one end attached. The gist is that the other end of a fixed and extendable coiled spring is supported in an inclined state so as to secure a predetermined ventilation path between the ducts.

[Effect]

According to this invention, the adjustment plate does not move until a certain level of intake pressure is reached, ensuring a fixed ventilation path, and when higher intake pressure is applied near the fan, the adjustment plate automatically moves against the coiled spring. Close the air passage to make it smaller. Furthermore, when the intake pressure becomes smaller, the tension of the spring automatically returns the adjustment plate to its original position, providing a predetermined amount of ventilation.

[Embodiments] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Fig. 1 is a partially cutaway side view showing one embodiment of the suction port of the present invention, and Fig. 2 is a top and bottom view of the same.
1 shows a duct for a suction port connected to a main duct (not shown), and a cylindrical body is used in this embodiment. This duct 1 opens into a ceiling plate 3 through a rectangular hood 2, and a wind baffle plate 4 is horizontally disposed in the center of the hood 2.

Fig. 3 is a sectional view taken along the line A-A in Fig. 1, and Fig. 4 is a vertical sectional front view showing the main parts.
One end of the adjustment plate 5 is pivotally attached to. Two bars 4 are provided parallel to each other in the center of the duct 1, and the adjusting plates 5 attached thereto are semicircular plates having a circumference that matches that of the duct 1, and when the two bars are put together, they match the cross-sectional shape of the duct 1. It is something to do.

On the other hand, a stopper 8 made of a horizontal flange is provided on the inner wall of the duct 1 to project inward so as to fix the adjustment plate 5 when it is horizontal, that is, at a position perpendicular to the duct 1.

The part that is pivoted to the bar 4 is near the diameter of the adjustment plate 5, and one end of a coiled spring 6 is fixed to the opposite end of the adjustment plate 5, and the other end of the spring 6 is connected to the end of the spring 6 near the opening of the duct 1. It is removably locked to a locking plate 7 provided in the center so that the mounting position can be changed in the vertical direction.

The length of this coiled spring 6 is selected so that the adjusting plate 5 and the coiled spring 6 form a dogleg shape between the bar 4 and the locking plate 7, but when the spring 6 is installed, The tip supports the adjustment plate 5 in an inclined state to ensure a ventilation passage with a predetermined cross-sectional area between the duct 1 and the adjustment plate 5. Further, the elasticity of the coiled spring 6 is determined so that it expands only when a predetermined wind pressure or more is applied to the adjustment plate 5.

In this embodiment, the adjustment plate 5 is arranged in a V-shape so that its opening can be changed as appropriate, but in the case of a small diameter duct, only half of the adjustment plate 5 as shown in FIG.
It is also conceivable that there is only one.

Next, the usage and operation will be explained. Negative pressure is applied to the duct 1 by the action of a fan provided in the main duct (not shown), and indoor air is sucked in. When the amount of suction is small and the amount of wind pressure applied to the adjusting plate 5 is small, both adjusting plates 5 maintain the V-shaped inclined state, and a ventilation passage with a certain area is formed in the duct 1.

On the other hand, when the action of the fan is strong and the suction amount increases, the amount of wind pressure hitting the adjustment plate 5 also increases, and the adjustment plate 5 approaches the horizontal state against the spring 6. The ventilation channels become narrower.

In this way, the pressure range before and after the adjustment plate 5 can be adjusted from 10 mmAg to 20 mmAg by using the magnitude of the extension of the spring 6.
It can be automatically adjusted so that a constant amount of air can be exhausted from the duct 1 between. Moreover, if it is desired to change the range of this constant air volume, the stopping position of the spring 6 relative to the locking plate 7 may be changed in the vertical direction. In this way, the initial opening degree of the adjustment plate 5 changes, and the tensile force of the spring 6 at a predetermined opening degree also changes.

[Effect of idea]

As described above, the air conditioning suction port of the present invention can always exhaust a constant amount of air by automatically increasing or decreasing the area of the ventilation passage in the duct even when the suction force of the fan varies. Therefore, there is no need to make adjustments at the time of completion, etc., and the construction of the duct becomes easy. Furthermore, since it has a simple structure consisting of only a combination of an adjustment plate and a spring, it can be manufactured at low cost, has few breakdowns, is easy to clean, and generates little noise.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway side view showing one embodiment of the air conditioning suction port of the present invention, Fig. 2 is a top and bottom view of the same, Fig. 3 is a sectional view taken along line A-A in Fig. 1, and Fig. 4. is a longitudinal sectional front view of the main part. 1...Duct, 2...Hood, 3...Ceiling board,
4... Bar, 5... Adjustment plate, 6... Winding spring, 7...
...Latching plate, 8...Stopper, 9...Air regulating plate.

Claims (1)

[Scope of utility model registration request] An adjustment plate that can be closed at a position orthogonal to the duct that forms the suction port is provided with one end pivoted, and the other end of the adjustment plate is fixed in the duct with one end fixed to the duct and an extendable coiled spring. An air conditioning suction port characterized in that the end is supported in an inclined state so as to secure a predetermined ventilation path between ducts.