KR100525020B1 - Exhaust ventilation system - Google Patents

Abstract

The present invention relates to an exhaust device capable of efficiently discharging hazardous substances and industrial dust.

Exhaust device according to an embodiment of the present invention is a hood in which air is sucked through the air inlet and the air is discharged through the air outlet, the width of the hood inlet and the air outlet side of the hood is narrow in the middle of the hood A gas induction device manufactured in a shape wide in height to increase the capture speed of the air sucked into the hood, a duct connected to the hood so that the air is transferred, and filtering the air transferred by the duct And an air purifying apparatus for purifying the air, a blower for allowing the air to be sucked and transported, and an exhaust pipe for exhausting the purified air through the air purifying apparatus to the outside.

By such a configuration, the exhaust device according to the embodiment of the present invention can improve the exhaust efficiency of the air by increasing the capture rate of the air sucked into the hood through the gas induction device installed inside the hood.

Description

Exhaust System {EXHAUST VENTILATION SYSTEM}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust device, and more particularly, to an exhaust device capable of efficiently discharging hazardous substances and industrial dust.

As the industry develops and diversifies, workers are exposed to various harmful factors. In general, methods of protecting workers from harmful factors include basic means such as raw material replacement, process change, sequestration, and local exhaust. Local Exhaust Ventilation System, which directly removes harmful substances from sources, is most widely used as part of engineering improvement measures. Currently in Korea, external hoods are widely used in the assembly process, plating of metal products, painting process of mechanical devices and reaction processes with open surfaces.

1 is a view showing a general exhaust device, Figure 2 is a plan view showing the exhaust device shown in FIG.

1 and 2, the general exhaust device 1 is connected to the hood 10 and the hood 10 to suck harmful substances in proximity to the harmful (pollution) source 80, so that harmful substances are transferred. Duct (20) to be, and the air cleaning device (Air Clean Device) (30) for purifying the air by filtering the harmful substances transported by the duct 20, and suction the air so that harmful substances are sucked and transported A blower 40 and an exhaust pipe 50 for exhausting the purified air to the outside.

The hood 10 may be classified differently according to the position and shape installed as a mechanism for sucking air. According to the installed position around the harmful source 80 that generates the harmful substances can be classified into upward (downward), downward (downward), laterally (Lateral) and oblique (Oblique) hood. In addition, it can be classified into enclosing, receivering, exterior hoods and the like according to its shape and principle of operation.

The hood 10 has a very fast flow rate as the distance from the inlet increases. Since the suction force of the general hood 10 is inversely proportional to the square of the distance between the inlet of the hood 10 and the suction, the suction force of the hood 10 should be installed as close to the harmful source 80 as possible to generate harmful substances. Such a hood 10 cannot obtain the desired amount of intake of air unless its design is designed by accurate data. However, most of the hood 10 is designed by the subjective experience of the designer, it is difficult to expect a consistent performance and high efficiency.

The duct 20 generally refers to a passage through which air and other fluids flow, and the duct 20 generally has a rectangular or circular cross section. As the material of the duct 20, a zinc iron sheet, vinyl chloride, glass fiber, or the like is used, and is formed as a structure with little deformation, air resistance and leakage with respect to air pressure inside, and low noise generation due to airflow.

The air purifier 30 is a device for removing harmful substances and industrial dust in the air, and there are a dry method using an air filter (air filter), an electric dust collector, and a wet method using an air cleaner (air washer). The filter used in the air purifier 30 includes a mechanical filter which collects using maltprene, a high performance filter which collects fine particles using glass or cellulose fibers, and a deodorizing filter which deodorizes odor using activated carbon. have. In order for the air purifying device 30 to have a high purification capability, the air purifying device 30 must be properly balanced between the dry method and the wet method.

The blower 40 is a device for generating air flow and is used to create a comfortable living environment in buildings that are closely related to daily life, office buildings, business facilities, and manufacturing facilities of various industrial sites, and is sensitive to temperature and humidity. It is widely used as an air conditioner including supply and exhaust and ventilation for the normal operation of electronic automatic control equipment. The blower 40 includes an axial flow fan, a radial flow fan, and a mixed flow fan according to air flow characteristics. When the flow of air occurs in a direction parallel to the axis of rotation of the vane, it is called an axial flow blower. The general propeller blower corresponds to this. Axial blowers are used where the energy applied is primarily used to increase the velocity of the fluid, so that a lot of flow is required but not so much pressure. The radial blower is mainly designed to increase the pressure by centrifugal force and is therefore used where pressure is needed rather than flow rate.

The exhaust pipe 50 is a means for allowing the air and gas purified by the air purifier 30 to be discharged to the outside, and its material and size are changed according to the type of air and gas discharged.

A general exhaust device 1 having such a component may be depleted of harmful substances when the performance of one of the above-described hood 10, duct 20, air purifier 30, blower 40, and exhaust pipe 50 is degraded. The capture speed will drop and it will not function properly.

Capture Velocity refers to a speed sufficient to capture harmful (pollutant) material and draw it into the hood 10. When the ambient air has little flow or the harmful substance itself has a very small momentum, the harmful substance may be sucked into the hood 10 only by a low capturing speed of the general exhaust apparatus 1 shown in FIGS. 1 and 2. However, in the actual working environment, there is not only a lot of air flow around the hood 10, but also the harmful substances themselves have a considerable momentum, so that the low trapping speed of the general exhaust system 1 can effectively inhale the harmful substances into the hood 10. Can not.

In 1991, the Korea Occupational Safety and Health Agency surveyed 748 manufacturers nationwide for the installation of local exhaust systems. Only 54.2% of the surveyed companies met the capturing rate, which represents the collection efficiency of hazardous substances, and 45.8% of the surveyed companies did not meet the criteria for capture rate. It was found that the exhaust was not smooth. These figures indicate that about half of all exhaust systems do not function properly to protect the health of workers and thus do not efficiently discharge hazardous materials and industrial dust. The causes of such performance deterioration were 84.1% of design failure, 7.9% installation failure, and 5.4% management failure. Through these findings, there is a demand for an exhaust system capable of efficiently discharging harmful substances and industrial dust.

Accordingly, an object of the present invention is to provide an exhaust device capable of efficiently discharging harmful substances and industrial dust.

In order to achieve the above object, the exhaust device according to an embodiment of the present invention is a hood in which air is sucked through the air inlet and the air is discharged through the air outlet, the air inlet side and the air outlet side of the hood A gas induction device having a narrow width and a wide shape at an intermediate height of the hood to increase a capture speed of air sucked into the hood, a duct connected to the hood to allow the air to be transferred, and to the duct And an air purifying apparatus for filtering the air transferred by the air to purify the air, a blower for sucking and transporting the air, and an exhaust pipe for exhausting the purified air through the air purifying apparatus to the outside. A portion of the gas guide device protrudes out of the hood. The gas guide device is characterized in that the cross section has a rhombic or trapezoidal shape. Other objects and features of the present invention in addition to the above object are attached to the accompanying drawings. It will be apparent from the description of the embodiments with reference to these.

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Hereinafter, exemplary embodiments of the present invention will be described with reference to FIGS. 3 to 7.

3 is a view showing an exhaust device according to an embodiment of the present invention.

Exhaust device 100 according to an embodiment of the present invention is installed in the hood 110 and the hood 110 to suck the harmful substances generated from the harmful (pollution) source 180, the hood by increasing the speed of trapping air Gas induction device 160 to improve the suction efficiency of the air sucked into the 110, the duct 120 is connected to the hood 110 so that the hazardous material is transported, and the hazardous material transported by the duct 120 The air purifier 130 to purify the air by filtering the filter, a blower 140 for sucking the air to suck and transport the harmful substances, and an exhaust pipe 150 for exhausting the purified air to the outside.

The hood 110 may be classified differently according to a location and a shape installed as a device for sucking air. According to the installed position around the harmful source 180 generating harmful substances, it can be classified into upward, downward, laterally and oblique hoods. In addition, it can be classified into enclosing, receivering, exterior hoods and the like according to its shape and principle of operation. Hood 110 of the exhaust device 100 according to an embodiment of the present invention is inclined so that the width of the inlet side where the air is sucked in, the outlet side where the air is exhausted, that is, the width of the portion in contact with the duct 120 narrow Is formed.

As shown in FIG. 4, the gas induction apparatus 160 has the narrowest width at the inlet and the outlet of the hood 110, and the width thereof is wider toward the middle of the hood 110, and its cross section is rhombic or trapezoidal. It is formed to have. The gas induction apparatus 160 is installed by joining both sides having a rhombus or trapezoidal shape to the inclined surface of the hood 110. In addition, the gas guide device 160 is formed so that a portion of the lower side protrudes out of the hood 110, as shown in FIGS. The gas induction apparatus 160 having such a shape increases the capture speed of air sucked into the hood 110 to improve the efficiency of the exhaust apparatus 100.

In the above description, the cross section of the gas induction apparatus 160 has a rhombic or trapezoidal shape. However, the cross-sectional shape of the gas induction device 160 may be applied to a polygonal shape that is not rhombic or trapezoidal.

The duct 120 generally refers to a passage through which air and other fluids flow, and a cross-section of the duct 120 is generally rectangular or circular. As the material of the duct 120, a zinc iron sheet, vinyl chloride, glass fiber, or the like is used, and is formed as a structure in which deformation, air resistance, and leakage are less with respect to the internal air pressure, and noise is less generated by airflow.

The air purifier 130 is a device that removes harmful substances and industrial dust in the air, and includes an air filter (air filter), a dry method using an electric dust collector, and a wet method using an air cleaner (air washer). The filters used in the air purifier 130 include a mechanical filter which collects using maltprene, a high performance filter which collects fine particles using glass or cellulose fibers, and a deodorizing filter which deodorizes odor using activated carbon. have. In order for the air purifier 130 to have a high purifying capacity, the air purifying apparatus 130 needs to be properly harmonized with the dry method.

The blower 140 is a device that generates air flow and is used to create a comfortable living environment in buildings, office buildings, business facilities, and manufacturing facilities, which are closely related to daily life, and sensitive to temperature and humidity. It is widely used as an air conditioner including supply and exhaust and ventilation for the normal operation of electronic automatic control equipment. The blower 140 includes an axial flow fan, a radial flow fan, and a mixed flow fan according to air flow characteristics. When the flow of air occurs in a direction parallel to the axis of rotation of the vane, it is called an axial flow blower. The general propeller blower corresponds to this. Axial blowers are used where the energy applied is primarily used to increase the velocity of the fluid, so that a lot of flow is required but not so much pressure. The radial blower is mainly designed to increase the pressure by centrifugal force and is therefore used where pressure is needed rather than flow rate.

The exhaust pipe 150 is a means for allowing air and gas purified by the air purifier 130 to be discharged to the outside, and its material and size are changed according to the type of air and gas discharged.

In order to derive the shape of the gas induction device 160 for maximizing the efficiency of the exhaust device 100 according to an embodiment of the present invention, the shape of the gas induction device 160 is changed as shown in Table 1 below, and the hood 110. The capture rate of the air sucked into) was measured.

The gas induction apparatus 160 is divided into an upper side and a lower side centering on the point where the width B is widest, where "B" is the maximum width of the gas induction apparatus 160 and "X" is the gas induction apparatus 160. "Y" represents the length of the lower side of the gas induction apparatus 160, "D" represents the length of the gas induction apparatus 160 protruding out of the hood 110.

Width (B) = 125 mm Width (B) = 150 mm Width (B) = 175 mm X Y X Y X Y X: Y = 5: 5 177 mm 177 mm 177 mm 177 mm 177 mm 177 mm X: Y = 4.5: 5.5 160 mm 195 mm 160 mm 195 mm 160 mm 195 mm X: Y = 4: 6 142 mm 213 mm 142 mm 213 mm 142 mm 213 mm X: Y = 3.5: 6.5 124 mm 230 mm 124 mm 230 mm 124 mm 230 mm X: Y = 3: 7 106 mm 248 mm 106 mm 248 mm 106 mm 248 mm

7 is a view showing a measuring point for measuring the capture speed of air on the cross-sectional view showing a gas induction apparatus and a hood.

7, the shape of the gas induction apparatus 160 to derive the shape of the gas induction apparatus 160 to maximize the efficiency of the exhaust system 100 according to an embodiment of the present invention as shown in Table 1 above It formed under conditions, and the air capture | acquisition speed | rate at the 1st point-the 5th point 170a-170e was measured. At this time, the length of the gas induction device 160 protruding out of the hood 110 was set to 50 mm. The results of the capture rate of air at the first measuring point P1 to the fifth measuring point P5 170a to 170e measured through such conditions are shown in Tables 2 to 16 below.

Table 2 below shows the measurement results when the maximum width "B" of the gas induction apparatus 160 is 125 mm and the length ratio (X: Y) of the upper side and the lower side is 5: 5.

Table 3 below shows the measurement results when the maximum width "B" of the gas induction apparatus 160 is 125 mm and the length ratio (X: Y) of the upper side and the lower side is 4.5: 5.5.

Table 4 below shows the measurement results when the maximum width "B" of the gas induction apparatus 160 is 125 mm and the length ratio (X: Y) of the upper side and the lower side is 4: 6.

Table 5 below is a measurement result when the maximum width "B" of the gas induction apparatus 160 is 125 mm and the length ratio (X: Y) of the upper side and the lower side is 3.5: 6.6.

Table 6 below shows the measurement results when the maximum width "B" of the gas induction apparatus 160 is 125 mm and the length ratio (X: Y) of the upper side and the lower side is 3: 7.

Table 7 below shows measurement results when the maximum width "B" of the gas induction apparatus 160 is 150 mm and the length ratio (X: Y) of the upper side and the lower side is 5: 5.

Table 8 below is a measurement result when the maximum width "B" of the gas induction apparatus 160 is 150 mm and the length ratio (X: Y) of the upper side and the lower side is 4.5: 5.5.

Table 9 below shows the measurement results when the maximum width "B" of the gas induction apparatus 160 is 150 mm and the length ratio (X: Y) of the upper side and the lower side is 4: 6.

Table 10 below is a measurement result when the maximum width "B" of the gas induction apparatus 160 is 150 mm and the length ratio (X: Y) of the upper side and the lower side is 3.5: 6.5.

Table 11 below shows measurement results when the maximum width "B" of the gas induction apparatus 160 is 150 mm and the length ratio (X: Y) of the upper side and the lower side is 3: 7.

Table 12 below shows the measurement results when the maximum width "B" of the gas induction apparatus 160 is 175 mm and the length ratio (X: Y) of the upper side and the lower side is 5: 5.

Table 13 below shows the measurement results when the maximum width "B" of the gas induction apparatus 160 is 175 mm and the length ratio (X: Y) of the upper side and the lower side is 4.5: 5.5.

Table 14 below shows measurement results when the maximum width "B" of the gas induction apparatus 160 is 175 mm and the length ratio (X: Y) of the upper side and the lower side is 4: 6.

Table 15 below shows measurement results when the maximum width "B" of the gas induction apparatus 160 is 175 mm and the length ratio (X: Y) of the upper side and the lower side is 3.5: 6.5.

Table 16 below shows the measurement results when the maximum width "B" of the gas induction apparatus 160 is 175 mm and the length ratio (X: Y) of the upper side and the lower side is 3: 7.

Through the above measurement, the results of the capture rate of air at the first measuring point (P1) to the fifth measuring point (P5) (170a to 170e) are summarized in Table 17 below.

When the maximum width B of the gas induction apparatus 160 is 125 mm based on the measurement results of Table 17, the first measuring point 170a and the fifth measuring point 170e, which are both ends of the hood 110, and When comparing the capturing speeds of the air measured at the second measuring point 170b and the fourth measuring point 170d, the capturing speed of the air sucked into the hood 110 is high when the ratio X and Y is 4: 6. can confirm. In addition, the first measuring point 170a, the fifth measuring point 170e, and the second measuring point which are both ends of the hood 110 when the maximum width B of the gas induction apparatus 160 is 150 mm and 175 mm. The capturing speed of the air measured at 170b and the fourth measuring point 170d is also equal to when the maximum width B of the gas induction apparatus 160 is 125 mm. It can be seen that the capture rate of the air sucked into the air is high.

Table 18 below describes the capture speed of the air sucked through the exhaust device 100 according to the embodiment of the present invention in which the general exhaust device 1 and the gas induction device 160 are not installed. Measurement results at the first to fifth measurement points 170a to 170e are compared and the average values are shown.

Through the measurement results of Table 17 and Table 18 above, when the ratio of X and Y of the gas induction device 160 is 4: 6, the suction efficiency of air can be increased at both ends of the hood 110. If the air suction efficiency is high at both ends of the hood 110, it is possible to prevent scattering of harmful substances, gases and dust generated at both ends of the hood 110, and to effectively prevent such harmful substances, gases and dust, etc. Can be captured and exhausted.

Exhaust device 100 according to an embodiment of the present invention in which the gas induction device 160 is installed increases the rate of trapping air sucked into the hood 110 compared to the general exhaust device 1 in which the gas induction device is not installed. Hazardous substances, gases, dust, etc. generated from the source 180 can be efficiently exhausted.

As described above, the exhaust device according to the embodiment of the present invention may improve the exhaust efficiency of the air by increasing the capture speed of the air sucked into the hood through the gas induction device installed in the hood.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

1 is a view showing a general exhaust device.

FIG. 2 is a plan view showing the exhaust device shown in FIG. 1. FIG.

3 is a view showing an exhaust device according to an embodiment of the present invention.

4 is a view showing in detail the gas induction device and hood of the exhaust device shown in FIG.

FIG. 5 is a cross-sectional view of the gas induction apparatus and the hood shown in FIG. 4 taken along line II ′. FIG.

FIG. 6 is a cross-sectional view of the gas induction apparatus and the hood shown in FIG. 4 taken along the line II-II '. FIG.

Fig. 7 shows measurement points for measuring the capture speed of air on a sectional view showing a gas induction device and a hood;

<Explanation of symbols for the main parts of the drawings>

1,100 Exhaust system 10,110 Hood

20,120: Duct 30,130: Air Purifier

40,140: Blower 50,150: Exhaust pipe

160: gas guide device 170: measuring point

80,180: Harmful (Pollution) Sources

B: maximum width of gas induction system

X: length of upper side of gas induction device

Y: Length of lower side of gas induction device

D: Length of gas guide device protruding out of hood

Claims (3)

A hood through which air is sucked through the air inlet and the air is discharged through the air outlet; A gas induction device configured to have a narrow width at the air inlet side and the air outlet side of the hood and to be wide at the middle height of the hood to increase the capture speed of air sucked into the hood; A duct connected to the hood to convey the air; An air purifier for filtering the air transferred by the duct to purify the air; A blower for sucking and transporting the air; And an exhaust pipe for exhausting the purified air through the air purifier to the outside. The method of claim 1, And a portion of the gas guide device protrudes out of the hood. The method of claim 1, The gas induction apparatus exhaust apparatus, characterized in that the cross section has a rhombic or trapezoidal shape.