JPS5938491B2 - Ventilation equipment for ducts - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a ventilation system for a duct, and more particularly to a ventilation system for a duct that utilizes a double suction type blower.

A duct ventilation system has a centrifugal blower built into the case, sucks contaminated air through an inlet on the flat side, and exhausts it into the duct through an exhaust outlet on the side.

In this type of conventional case, as shown in FIG.
A centrifugal force type blade 2 is arranged inside the fan, and air is guided to an exhaust port 4 by a guide 3 that spreads in a spiral shape, and then sent out to a common exhaust duct 5, which has the characteristic of maximizing the performance as a blower.

However, when exhausting air from a pair of ventilation devices to a common exhaust duct 5 as shown in FIG. 1, using the same ventilation device has the following disadvantages.

In other words, since the exhaust ports 4 that are eccentric with respect to the case 1Vc face each other in line symmetry, a positional shift occurs with respect to the common exhaust duct 5, which may complicate the man-hours of duct construction or make the construction impossible. .

A conventional method for solving this problem is to use a symmetrical ventilation system in which the eccentricity of the exhaust port 4 with respect to the case 1 is different.

However, according to this method, 2
It is not a good idea because it requires a different type of ventilation system, and it is expensive at the time of manufacturing and requires management of two copies at the construction stage.

Furthermore, since the rotation directions of the blades are different, there is a drawback that the main parts, including the blades and the electric motor, are separate parts.

The present invention has been made in view of these points, and aims to provide a duct ventilation device that solves the above-mentioned problems and has a greater degree of freedom in installation.

Hereinafter, one embodiment of the present invention will be described with reference to FIG. 2 and subsequent figures.

The case 6 is closed by a cover 7 forming a part of the case, and the case 6 and the cover 7 have a first suction port 8 and a second suction port 9 formed at substantially central portions facing each other.
Both blades 11 are attached to the rotating shaft of an electric motor 10 attached to the suction port 9, making it a double-sided suction type.

Reference numeral 12 denotes a hood that covers the entire ventilation system, and the case 6 is attached to the top plate 1 of the hood 12 by screws 20 through the support fittings 13.
It is supported by 4.

This hood 12 has a top plate 14 located at a distance from the first suction port 8 so that the contaminated airflow rising downward can be efficiently sucked into the ventilation system without spreading it to the surroundings.
Further, the side portions are closed by fitting side plates 15, 15.

21 is a fitting groove. And this side plate is, is
A communication hole 16.16 is bored in the hole, into which a duct 17 is piped.

18 is a guide placed between the case 6 and the cover 7;
This guide 18 communicates with an exhaust port 19 located eccentrically with respect to the center of the case 6 .

This exhaust port 19 is connected to the duct 17.

From the above, although the exhaust port 19 is located at an eccentric position, since it has a built-in double-sided suction type blower, it can be used even if it is turned upside down. The same functionality can be obtained without doing so.

That is, it is easy to change the exhaust direction, and there is a large degree of freedom when it comes to installation.

Furthermore, since there are two suction ports, the width of the blades 11 works more effectively than when there is only one suction port, resulting in excellent air volume and noise.

Note that although the double-sided suction type blower is somewhat more complicated in shape, it does not require an increase in the number of parts and does not result in high costs.

Compared to preparing parts for two models, the manufacturing cost of the mold,
The cost is lower in terms of both the number of parts and the amount of management effort.

Further, the case 6 can be removed by loosening the screws from the support fitting 13 after removing the connecting portion of the duct 17, and there is no problem during disassembly for cleaning or servicing.

Further, the ventilation device can be mounted in any direction as required by changing the mounting state to the support fitting 13.

In the above, the hood 12 is not necessarily necessary, and the case 6 may be reversibly mounted directly on the wall using the support fittings 13.

As described above, according to the present invention, a single model can be attached in various ways, and the degree of freedom in attachment is increased.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional plan view of a conventional duct ventilation device, FIG. 2 is a longitudinal sectional view showing an embodiment of the duct ventilation device according to the present invention, and FIG. 3 is a partial perspective view of FIG. 2. It is. 6... Case, 8... First suction port, 9
...Second suction port, 11...Both wing blades,
13...Mounting fee included 19...Exhaust port.

Claims (1)

[Claims] 1. In a duct ventilation system in which a centrifugal blower is built into a box-shaped case and forced air is forced from an inlet provided on the flat side of the case to an exhaust port provided on the side surface, one side of the case facing the The first suction port is placed on a flat surface, and the second suction port is placed on the other flat surface.
A suction port is provided, and the blower has double wing-shaped blades corresponding to the first and second suction ports, and mounting means for selectively facing the first and second suction ports with respect to the mounting wall surface is provided in the case. Ventilation equipment for ducts installed against.