JP2776735B2 - Induced ventilation - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an induced ventilation device for mainly replacing air in a room such as an office or a living room.

[0002]

2. Description of the Related Art In recent years, the degree of airtightness of houses has been increased, and as a result, the necessity of ventilation has been increased. It has been demanded to improve the comfort of living rooms by providing more efficient and low-noise ventilation. Have been.

[0003] In a conventional ventilator, generally, indoor air is exhausted to the outside using a motor and a blade. However, in order to improve indoor comfort, it is important to reduce noise of the motor and the blade. Was a major challenge.

[0004] Therefore, as a ventilation device that does not use a motor or a blade that is a source of noise, an induction ventilation device that performs ventilation using air induction has been proposed.

[0005] Hereinafter, this type of induced ventilation device will be described with reference to FIG.
This will be described with reference to FIG.

As shown in the figure, a ventilation device 101 includes a ventilation duct 107 for connecting a suction port 103 attached to a ceiling 102 and an exhaust port 105 attached to an outer wall 104 of a building at a space 106 above the ceiling. It is provided in. In addition, the ventilator 101 is
And a main body case 111 surrounding the outer peripheral portion of the venturi portion 108 and forming a pressure chamber 110 communicating with the venturi portion 108 via a slit 109. The air intake portion 112 provided in the main body case 111 has Further, an air duct 115 communicating with a blower fan 114 installed outside the building 113 was connected.

When the room 116 is ventilated by the ventilation device 101 having such a configuration, the blower fan 11
4 is operated to pump air into the air duct 115.
Then, by blowing compressed air from the pressure chamber 110 into the venturi section 108 through the slit 109, the dirty air 117 in the room 116 is drawn into the venturi section 108 from the suction port 103, and the slit 1
In addition, the air was discharged from the exhaust port 105 to the outside 113 of the building together with the compressed air blown out from the engine 09.

[0008]

In such a conventional ventilating apparatus 101, when the compressed air sent from the blower fan 114 passes through the air intake 112 and enters the pressure chamber 110, the venturi 108 Turbulence while violently colliding with the outer wall surface 118 of the pressure chamber 110 and flowing in the direction of the slit 109, the pressure balance inside the pressure chamber 110 is lost, and
The compressed air blown into the venturi section 108 from inside is uneven and sparse. Therefore, there has been a problem that the amount of indoor air drawn from the suction port 103 becomes unstable, so that the induced ventilation efficiency is deteriorated and noise is also increased.

The present invention solves the above-mentioned problems, and the compressed air flowing into the pressure chamber violently hits the outer wall surface of the venturi and becomes a turbulent flow. It is an object of the present invention to provide an induced ventilation device capable of preventing noise from decreasing and reducing noise.

[0010]

Means for Solving the Problems] attracting ventilator of the present invention to achieve the <br/> above object, smoothly connecting the first means to the attraction port forming different cylindrical diameters and outlet An elliptical conical venturi portion, a pressure chamber surrounding the outer periphery of the venturi portion, and communicating with the inside of the venturi portion through a slit opened in the inner peripheral portion of the venturi portion, and a ventilation communicating with the inside of the pressure chamber. One air intake portion having a passage, and blowing means for feeding air to the pressure chamber through the ventilation passage of the air intake portion, wherein the direction of the ventilation passage of the air intake portion is directed to the outer wall surface of the venturi portion. It is formed in a circumferential direction along .

A second means for achieving the above-mentioned object is that of the first means, wherein the ventilation path of the air intake section is formed in a conical ventilation system which is formed in a conical shape extending toward the venturi side. .

[0012]

According to the first aspect of the present invention, the compressed air sent from the blower into the pressure chamber is provided by the first means.
After being bent in the circumferential direction of the venturi part when passing through the ventilation path of the air intake part, it smoothly goes around the entire circumference of the venturi part along the outer wall surface of the venturi part, so that the pressure inside the pressure chamber is even. A pressure distribution results, and the compressed air is blown out of the slits smoothly and evenly into the venturi section.

Further, according to the configuration of the second means, the compressed air spreads inside the ventilation passage when passing through the ventilation passage of the air intake section, reduces its flow velocity, and then goes around the entire circumference of the venturi section. Therefore, the pressure chamber interior has a more uniform pressure distribution, and the pumping air blows out of the slit more smoothly and evenly into the venturi section.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
This will be described with reference to FIG.

As shown in the figure, the main body of the induced ventilation device
A conical venturi portion 4 that smoothly connects an inlet port 2 and an exhaust port 3 having different cylindrical shapes to each other; and a slit 5 that surrounds the outer peripheral portion of the venturi portion 4 and opens in the inner peripheral portion of the venturi portion 4. A pressure chamber 6 communicating with the inside of the venturi section 4 through the ventilator section 4, and a ventilation path 8 communicating with the inside of the pressure chamber 6 and formed in a circumferential direction along the outer wall surface of the venturi section 4.
A case 7 provided with an air intake portion 8 having an air inlet A
And the air is exhausted from the exhaust port 12 to the outside 13 of the building. And the ventilation path 8 of the air intake section 8
A blower fan 14, which is a blower for blowing air into the pressure chamber 6 through A, is installed on the ceiling back 15 or the like,
The air intake unit 8 is connected to the air duct 16.

In the above configuration, the compressed air sent from the blower fan 14 is sent through the air duct 16 to the pressure chamber 6 of the main body 1 of the induced ventilation device. The compressed air is bent in the circumferential direction of the venturi section 4 when passing through the ventilation path 8A of the air intake section 8, and then violently hits the outer wall of the venturi section 4 without being disturbed. Along the entire circumference of the venturi portion 4, the inside of the pressure chamber 6 has an even pressure distribution, and the pressure is smoothly and evenly blown out from the slit 5 into the venturi portion 4. At this time, the blown compressed air flows along the inner wall of the venturi section 4 to generate a negative pressure area, and draws in the dirty indoor air 11 from the suction port 10 and, together with the compressed air, the exhaust port 1.
2 can be exhausted to the outside 13 of the building.

In this embodiment, the blower for blowing air into the pressure chamber 6 is the blower fan 14, but may be a compressor or the like. Further, the installation position of the blower fan 14 is also the ceiling back 15, 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.
This will be described with reference to FIG. The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

As shown in the drawing, the second embodiment is similar to the first embodiment.
The embodiment is characterized in that the ventilation path 8B of the air intake section 8 is formed in a conical shape that extends toward the venturi section 4 side.

In the above configuration, the compressed air entering the ventilation path 8B of the air intake section 8 spreads inside the ventilation path 8B, reduces its flow rate, and then goes around the entire circumference of the venturi section 4, so that the pressure chamber 6 The inside becomes a more uniform pressure distribution, and more smoothly from the slit 5, and
This will blow out evenly into the venturi section 4.

[0021]

As is apparent from the above embodiment, according to the present invention, the direction of the ventilation path of the air intake section is formed in the circumferential direction along the outer wall surface of the venturi section, whereby the ventilation path is formed. The pressure-feeding air flowing into the pressure chamber passes through the entire surface of the venturi smoothly along the outer wall of the venturi without violently hitting the outer wall of the venturi, so that the pressure balance inside the pressure chamber is lost, It is possible to provide an induced ventilation device that can prevent the induced ventilation efficiency from lowering and can also reduce noise.

Further, by forming the ventilation passage of the air intake portion into a conical shape extending toward the venturi portion, the compressed air flowing into the pressure chamber through the ventilation passage is reduced.
After expanding the inside of the ventilation path and lowering its flow velocity, it goes around the entire circumference of the venturi section, so that the pressure chamber interior has a more even pressure distribution, and the pumping air can be more smoothly and evenly distributed from the slit. Can be blown out inside.

[Brief description of the drawings]

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

FIG. 2 is a front view of a main body of the induced ventilation device according to the first embodiment.

FIG. 3 is a schematic diagram showing a configuration of the induced ventilation device of the first embodiment.

FIG. 4 is a front view of the induced ventilation device according to the second embodiment.

FIG. 5 is a schematic diagram showing the configuration of a conventional induced ventilation device

FIG. 6 is a sectional view showing a configuration of a main body of the induced ventilation device.

[Explanation of symbols]

 2 Inlet 3 Exhaust 4 Venturi 5 Slit 6 Pressure chamber 8 Air intake 8A Ventilation 8B Ventilation 14 Blower fan (Blower)

Claims (2)

(57) [Claims] 1. A conical venturi section which smoothly connects an inlet port and an exhaust port each having a cylindrical shape having a different diameter, and a slit surrounding an outer peripheral portion of the venturi portion and opening to an inner peripheral portion of the venturi portion. A pressure chamber that communicates with the inside of the venturi section through an air inlet, an air intake section having a ventilation path that communicates with the interior of the pressure chamber, and a blower that pumps air to the pressure chamber through the ventilation path of the air intake section. Means, and the direction of the ventilation path of the air intake section is changed to the outer wall surface of the venturi section.
Induced ventilation device formed in the circumferential direction along the . 2. The induced ventilation device according to claim 1, wherein the ventilation path of the air intake section is formed in a conical shape extending toward the venturi section.