JPH07174382A - Induced ventilation device - Google Patents

Abstract

PURPOSE:To provide an induced ventilation device, capable of improving induced ventilation efficiency further, by a method wherein air is sent out of a slit smoothly and evenly to stabilize the amount of discharged indoor air. CONSTITUTION:An induced ventilation device is constituted of a conical Venturi unit 4, in which an inducing port 2 having a cylindrical shape having different diameters is connected to an air discharging port 3 smoothly, and a case 8, forming a pressure chamber 7 equipped with a slanted wall 6 slanted outwardly from a slit 5 opened at the inner peripheral part of the Venturi unit 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an induction ventilator for mainly changing the air in a room such as an office or a living room.

[0002]

2. Description of the Related Art In recent years, housing has become highly airtight,
As a result, the need for ventilation is increasing, and it is required to improve the comfort of the living space by performing more efficient ventilation with low noise.

In a conventional ventilation device, air in a room is generally exhausted to the outside by using an electric motor and blades, but in order to improve indoor comfort, it is important to reduce noise of the electric motor and the blades. It was a problem.

Therefore, as a ventilator that does not use an electric motor or a blade that is a source of noise, there has been proposed an induction ventilator that performs ventilation by using air attraction.

Hereinafter, this type of induction ventilation device will be described with reference to FIG.
The description will be made with reference to FIG.

As shown in the figure, a ventilation device 101 has a ventilation duct 107 in which a suction port 103 mounted on a ceiling 102 and an exhaust port 105 mounted on an outer wall 104 of a building are connected to each other by a ceiling 106. It is provided in. The ventilator 101 is connected to the venturi portion 108 and the main body case 111 so as to form a pressure chamber 110 that surrounds the outer periphery of the venturi portion 108 and communicates with the venturi portion 108 via the slit 109. Outside the building 11 in the body case 111
A blower duct 114 that communicates with the blower fan 113 and the like installed in No. 2 is connected.

When the room 115 is ventilated by the ventilation device 101 having such a structure, the blower fan 11
3 is operated, and air is pressure-fed into the ventilation duct 114.
Then, by blowing air from the pressure chamber 110 through the slit 109 to the venturi portion 108,
The dirty air 116 in the room 115 is attracted to the venturi section 108 from the suction port 103 provided in the ceiling 102, and the air blown out from the slit 109 together with the exhaust port 105.
Was discharged from outside the building to 112.

[0008]

In such a conventional induction ventilator 101, when the air sent from the blower fan 113 enters the pressure chamber 110, it violently collides with the slit 109 without flowing smoothly. Therefore, the pressure balance is lost and the slit 109
The air blown out from the venturi portion 108 becomes non-uniform. Therefore, the suction port 103 provided on the ceiling 102
There is a problem in that the amount of indoor air attracted from is not stable, the attractive ventilation efficiency is poor, and the noise is high. Also, even if the slit width is uniform, uniform air can be sent to the venturi portion 108,
Since the venturi portion 108 and the main body case 111 are connected by a screw or the like, the centers are not aligned and the slit width tends to be offset, which results in a problem that a stable exhaust volume cannot be secured and the attractive ventilation efficiency deteriorates. was there.

The present invention is intended to solve the above-mentioned problems. The air entering the pressure chamber is blown out smoothly and evenly from the slits into the venturi section without disturbing it, thereby stabilizing the amount of indoor air exhausted, It is a first object of the present invention to provide a suction ventilation device capable of improving the suction ventilation efficiency and reducing noise.

A second object is to make the slit width uniform so that the air blown out from the slit to the venturi portion becomes more uniform, the amount of room air exhausted is stabilized, and the induced ventilation efficiency is further improved. Especially.

[0011]

In order to achieve the above-mentioned first object, the induction ventilator of the present invention has a first means, which is a cylindrical inlet and outlet having different diameters, and an inlet and an outlet. With a conical venturi part that smoothly connects the exhaust port,
The venturi portion is connected to the venturi portion through a slit that opens in the inner peripheral portion of the venturi portion, and is formed of a case that forms a pressure chamber having an inclined wall that is inclined in a direction that extends outward from the slit portion. is there.

A second means for achieving the second object is a structure in which the venturi portion and the case are integrally formed.

[0013]

According to the present invention, by the constitution of the above-mentioned first means, the air entering the pressure chamber flows to the slit along the inclined wall without being disturbed, and is smoothly and evenly blown to the venturi portion, It is possible to stabilize the amount of indoor air exhausted, improve the induced ventilation efficiency, and reduce noise.

Further, with the constitution of the second means, it is possible to blow out uniform air to the venturi from the slits of uniform width, so that the amount of room air to be exhausted can be made more stable,
The induced ventilation efficiency can be further improved.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. As shown in the figure, a main body 1 of the induction ventilator includes an induction port 2 and an exhaust port 3 each having a cylindrical shape with different diameters, and a conical venturi portion 4 that smoothly connects the intake port 2 and the exhaust port 3. A case 8 that communicates with the venturi portion 4 through a slit 5 that opens in the inner peripheral portion of the venturi portion 4 and forms a pressure chamber 7 having an inclined wall 6 that is inclined in a direction that extends outward from the slit 5. The indoor air 11 is drawn from the suction opening 10 formed in the ceiling 9 and is exhausted to the outside 12 of the building. A blower fan 14 for sending air under pressure to the pressure chamber 7 is installed on the ceiling 15 or the like, and is connected to the case 8 by a blower duct 16.

In the above structure, the air pressure-fed from the blower fan 14 is sent to the pressure chamber 7 of the main body 1 of the induction ventilation device through the blower duct 16. This air flows to the slit 5 along the inclined wall 6 without being disturbed, and is smoothly and evenly blown from the slit 5 to the venturi portion 4. At this time, the blown air is
A negative pressure region is generated by flowing along the inner wall of the Venturi portion 4, and dirty indoor air 11 is drawn from a suction port 10 opened in the ceiling 9 and exhausted from the exhaust port 13 to the outside 12 of the building together with the blown air. You can

In this embodiment, the blower fan 14 is used as the supply means for sending air under pressure, but a compressor or the like may be used. Further, the installation position of the blower fan 14 is also the ceiling 15 in this embodiment, but it may be installed outdoors or in a remote place such as a machine room.

Next, a second embodiment of the present invention will be described with reference to FIG.
Will be described with reference to. The same parts as those in the first embodiment are designated by the same reference numerals and the detailed description thereof will be omitted.

As shown in the figure, the venturi portion 4a and the case 8a forming the pressure chamber 7 are integrally formed.

In the above structure, it is not necessary to connect the venturi portion 4a and the case 8a with their centers aligned,
Can be connected together. By integrally molding as in the present embodiment, it is not necessary to align the centers of the venturi portion 4a and the case 8a, and the width of the slit 5 can be formed evenly. Therefore, it is possible to blow out uniform air to the venturi portion 4 through the slits 5 having uniform width.

[0021]

As is apparent from the above embodiments, according to the present invention, the venturi portion is communicated with the venturi portion through the slit opening in the inner peripheral portion of the venturi portion, and the slit portion extends outward. Since the case that forms the pressure chamber with the inclined wall is provided, the air can be blown out from the slit smoothly and evenly, the amount of air in the room to be exhausted is stabilized, and the induced ventilation efficiency is further improved. At the same time, it is possible to provide an induction ventilation device that can reduce noise.

Further, since the venturi portion and the case are integrally formed, the assembling work for equalizing the width of the slit is eliminated, the assembling accuracy is improved, and the number of parts can be reduced.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a configuration of a main body of an induction ventilation device according to a first embodiment of the present invention.

FIG. 2 is a schematic diagram showing the configuration of the induction ventilation device of the first embodiment.

FIG. 3 is a sectional view showing the configuration of the main body of the induction ventilation device of the second embodiment.

FIG. 4 is a schematic diagram showing a configuration of a conventional induction ventilation device.

FIG. 5 is a cross-sectional view showing a configuration of a main body of a conventional induction ventilation device.

[Explanation of symbols]

 1 Main body of induction ventilator 2 Induction port 3 Exhaust port 4 Venturi part 4a Venturi part 5 Slit 6 Inclined wall 7 Pressure chamber 8 Case 8a Case

Claims (2)

[Claims] 1. An inlet and an outlet having a cylindrical shape with different diameters, a conical venturi portion smoothly connecting the inlet and the outlet, and a slit opening in an inner peripheral portion of the venturi portion. And a ventilating section, which forms a pressure chamber having an inclined wall that is inclined in a direction extending outward from the slit section. 2. The induction ventilation device according to claim 1, wherein the venturi portion and the case are integrally formed.