JPH06313597A - Ventilator - Google Patents

Abstract

PURPOSE:To provide a ventilator which can be easily cleaned and improve executability of reinforcing a beam of a building, a through part of an exhaust duct of a wall. CONSTITUTION:The ventilator comprises an injection tube 7 so provided as to form to cover a vent passage 3 on an outer periphery of a vent tube 2 having an orifice 1 at an indoor side, having an air inlet duct 4 for feeding pressure air to an indoor side and reduced in diameter toward the outdoor side, and an exhaust duct 10 connected to the outdoor side of the tube 7, wherein the air in a room is induced to be ventilated by a jet flow from the tube 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilator for ventilating using compressed air compressed by a compressor or the like.

[0002]

2. Description of the Related Art In recent years, energy saving and space saving have been demanded, and in terms of air-conditioning equipment, there is an increasing demand for weight reduction, a small amount, and workability at the time of installation by reducing the diameter of an exhaust duct.

A conventional ventilation fan of this type will be described with reference to FIGS. 4 and 5. As shown in the figure, the wall 1
No. 01 ventilation hole 102 is provided on the indoor side of the ventilation fan body 103 with an orifice 104 for rectifying intake air.
A motor 106 having a fan 105 for ventilation and ventilation is provided inside the ventilation fan main body 103.

In order to discharge the air sucked from the indoor side to the outside, an exhaust duct 107 having a large diameter is connected to the outdoor side of the ventilation fan main body 103.

[0005]

In such a conventional ventilation fan configuration, the beam 108 and the wall of the building must be penetrated while the exhaust duct 10 having a large diameter connected to the ventilation fan main body 103 is made to reach the outside. In many cases, the through-hole portion 109 requires large-scale reinforcement work due to legal regulations and voluntary standards, and it is extremely difficult to save work in designing and constructing the reinforcement point such as the position and diameter of the through-hole. There was an important issue.

Further, penetrating the large-diameter exhaust duct 107 through the beams 108 and walls of the building increases the labor cost and material cost of the reinforcing work, prolongs the construction period, and secures transportation equipment and storage space. There are also many demands for downsizing of the exhaust duct 107 due to adverse effects, and the ventilation fan main body 103
Also in terms of management of the fan 1 inside the ventilation fan main body 103
05 and the motor 106 are directly contacted with indoor air, so that the fan 105 and the motor 106 are contaminated, and it takes a lot of labor and time to clean the fan 105 which has a complicated shape and is easily soiled. There was a problem that the ventilation fan had to be used because the frequency was remarkably reduced and the pollutant remained contaminated.

The present invention solves the above-mentioned problems, and provides a ventilation device that can be easily cleaned by significantly improving the workability for reinforcing the penetration portion of the exhaust duct of a beam or wall of a building. To aim.

[0008]

In order to achieve the above object, the ventilation device of the present invention has a ventilation pipe having a trumpet-shaped orifice on the indoor side, and a ventilation passage is formed on the outer periphery of the ventilation pipe to cover the ventilation pipe. It has an air inflow duct such as a compressor for inflowing compressed air on the indoor side, the diameter is reduced toward the outdoor side, and the end opened from the end of the ventilation pipe to the outdoor side. An exhaust pipe and an exhaust duct connected to the outdoor side of the exhaust pipe are provided, and the indoor air is attracted to the ventilation pipe by the air flow emitted from the exhaust pipe to the outside for ventilation.

[0009]

According to the present invention, due to the above-described structure, the pressure air flowing from the air inflow duct to the ejection pipe increases in flow velocity as the diameter decreases while passing through the ventilation passage, and the increased kinetic energy attracts strong negative pressure. It has power, and the indoor air is attracted to the ventilation pipe to be ventilated.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.
Will be described with reference to. As shown in the figure, a ventilation pipe 2 having a trumpet-shaped orifice 1 on the indoor side and a ventilation passage 3 formed on the outer periphery of the ventilation pipe 2 are provided so as to cover the compressed air on the indoor side. Has an air inflow duct 4 through which a small diameter tubular portion 6 is reduced through a reduction portion 5 whose diameter is reduced toward the outdoor side so that the end portion of the small diameter tubular portion 6 projects outward from the end portion of the ventilation pipe 2 and opens. The jet pipe 7 is formed, the jet pipe 7 is attached to the ventilation hole 9 provided in the wall portion 8, and the exhaust duct 10 is connected to the outdoor side of the jet pipe 7.

Before explaining the operation of the ventilator constructed as described above, the nature of the fluid will be explained. One of the basic theories of fluids is the theory of energy states called Bernoulli's theorem. Generally, ρ is the fluid density, v
Rate of the fluid, g the gravitational acceleration, the height from a reference horizontal plane z, when the pressure at the cross section in the p, ρv ^2/2 + ρ
It is widely known that it is expressed as gz + p = constant. This theorem considers the first term as kinetic energy, the second term as potential energy, and the third term as pressure energy, and the sum of these energies is constant. Here under the conditions of flow as shown in the figure, when applying the Bernoulli's principle _{^{ρv 1 2/2 + p 1}} = ρv 2 2/2 + p 2 but holds relationship, also of different diameter air flow rate Q in a certain time When passing through the cylinder, it is clear that the cylinder having a smaller diameter has a higher fluid velocity, and the flow velocity v ₁ <
v ₂ and pressure p ₁ > p ₂ can be expressed, which means that pressure energy is converted into kinetic energy.

In the above structure, when the compressed air sent from the compressor or the like flows into the ejection pipe 7 from the air inflow duct 4, the reducing portion 5 is formed so that its diameter is reduced toward the outdoor side. Further, the flow velocity is increased by the small-diameter tubular portion 6, and the kinetic energy of the air passing through the ventilation passage 3 is increased at the square of the flow velocity.

When the air having the increased kinetic energy is ejected from the open end of the ejection pipe 7, the ejected air has a strong negative pressure attraction force, and the indoor air passes through the ventilation pipe 2. Ventilation is performed by being attracted to the street and discharged together with the jet air through the exhaust duct 10 to the outside.

As described above, according to the ventilation device of the embodiment of the present invention, since the exhaust duct 10 is connected to the small-diameter cylindrical portion 6 having a small diameter, the exhaust duct 10 has a small diameter and the workability is improved. The related cost can be reduced and the ventilation pipe 2 having the orifice 1 can be cleaned very easily because there is no fan or motor.

[0015]

As is apparent from the above embodiments, according to the present invention, a ventilation duct is formed on the outer periphery of a ventilation pipe having an orifice on the indoor side so as to cover the ventilation duct, and compressed air is provided on the indoor side. It has an air inflow duct that flows in, and an exhaust duct that is connected to a jet pipe whose diameter is reduced toward the outdoor side is provided, and indoor air is ventilated by a strong attracting action generated by the jet air jetted from the jet pipe. As a result, the exhaust duct can be reduced in diameter, and a ventilation device that can improve cleaning performance can be provided.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state in which a ventilation device according to an exemplary embodiment of the present invention is attached to a wall portion.

FIG. 2 is an enlarged cross-sectional view showing the air flow of the ventilation device.

FIG. 3 is a characteristic diagram showing energy of airflow of the ventilation device.

FIG. 4 is a cross-sectional view showing a state in which a conventional ventilation fan is attached to a wall portion.

FIG. 5 is a perspective view showing a mounting state of the ventilation fan.

[Explanation of symbols]

 1 Orifice 2 Ventilation pipe 3 Ventilation path 4 Air inflow duct 7 Jet pipe 10 Exhaust duct

Claims (1)

[Claims] 1. A ventilation pipe having a trumpet-shaped orifice on the indoor side, and a ventilation passage formed on the outer periphery of the ventilation pipe so as to cover the ventilation pipe. An exhaust pipe having a duct, the diameter of which is reduced toward the outdoor side, and the end of which is open from the end of the ventilation pipe so as to project to the outdoor side, and an exhaust duct which is connected to the outdoor side of the exhaust pipe. A ventilating device, comprising: a ventilation pipe configured to attract indoor air to a ventilation pipe by means of a jet air flow from the jet pipe to the outside.