KR101112024B1 - Air closed type fume hood system - Google Patents

Abstract

The present invention relates to an air-tight structure of a fume hood system in which openings and doors are formed on a plurality of side surfaces, and more particularly, is installed on an outer upper side of the door and the nozzles of the lower side are directed toward the outside of the door. The nozzle spray type upper air curtain device, and the rotary tee line lower air curtain device which is installed outside the lower end of the opening and the air injection port is automatically hinged toward the inside of the chamber as the door descends, the nozzle spray type upper air curtain device Air is blown out from each nozzle of the air curtain to form an air curtain covering the front of the opening, and the air curtain airflow is guided to the discharge duct by the airflow of the lower air curtain device of the rotary tee line, thereby effectively air sealing the front of the opening. Air sealed fume hood system to prevent gas and odor from leaking indoors Ball.

Description

Air sealed fume hood system {AIR CLOSED TYPE FUME HOOD SYSTEM}

The present invention relates to an airtight structure of a fume hood system in which openings and doors are formed on a plurality of side surfaces, and in detail, the air is sprayed from each nozzle of the nozzle spray type upper air curtain device to cover the front of the opening. The air curtain is formed, and the air curtain airflow is guided to the discharge duct by the airflow injection of the lower air curtain device of the rotary tee line, thereby effectively sealing the entire surface of the opening, thereby preventing harmful gas and odor from leaking indoors. A hermetic fume hood system.

In general, the experimental fume hood system is installed in the laboratory or restaurant kitchen of various research institutes performing chemical experiments so that experiments in which harmful gases are generated can be performed in an internal chamber, and various harmful gases generated at this time, The odor can be released to the outside of the laboratory, so that researchers conducting experiments can avoid the health damage caused by contact with harmful gases.

The conventional fume hood system developed for the above reason has a constant volume chamber formed inside the outer housing, and the door slides up and down at the opening in the front of the chamber to block or expose the chamber to the outside. It is formed, the suction means for sucking various harmful gases, odor generated when the experiment in the chamber is mainly formed on the upper side of the housing, and the various harmful gases, odor sucked by the suction means outside the laboratory It is obvious that it is connected to the discharge duct to discharge the furnace.

In the fume hood system, the suction and discharge devices are always operated to prevent the introduction of various harmful gases and odors into the room during the experiment. Therefore, the indoor air is discharged together with the harmful gas through the chamber. Is discharged.

However, the conventional fume hood system has a movement speed of 0.1 to 0.2 m / s when the door is opened, while the fume hood system is generated during an experiment (pyrolysis experiment, combustion, experiment, organic solvent mixing experiment, etc.) inside the fume hood system. Hazardous gases to increase the energy due to the temperature rise, the movement speed of the harmful gas is increased to 0.4 ~ 0.6 m / s depending on the type of gas. Therefore, harmful gases and odors having a higher energy than the air intake rate of the fume hood system are leaked to the outside through the opening of the housing to contaminate the interior, which poses a danger to the health of the researchers and significantly reduces the work ability. In order to solve this problem, conventionally, by simply increasing the power of the fume hood blower, the flow rate of the inhaled air is increased to prevent toxic gases and odors flowing into the room. However, this method loses electric power due to the increase of the blower power. When the indoor air is cooled and heated, a large amount of indoor air is discharged to the outside, thereby increasing the cooling and heating energy loss. As a result, it was difficult to maintain a comfortable indoor environment and always suffered from contaminated air and odors. Therefore, researchers had to use a mask with a filter.

In addition, the harmful gas generated from the fume hood system may be lighter than air, and there may be harmful gas that is heavier than air. Thus, the gas that is heavier than air sinks to the bottom of the test space. There is a problem that most of the harmful gas accumulated at the bottom of the experimental space is finally introduced into the room.

In order to solve this problem, Korean Registered Utility Model Publication No. 20-0355525 (designated name: Experimental fume hood) forms an exhaust passage by forming a partition wall spaced at a predetermined distance from the bottom surface to the back side of the test space. An experimental fume hood having a first discharge door selectively fixed while sliding up and down on a rear surface close to the partition wall and modifying the position of the first discharge door is disclosed to discharge harmful gases heavier than air. However, the experimental fume hood lacks a means of forcibly promoting the discharge of harmful gas that is heavier than air, and inhales and discharges the harmful gas by the power of the brower which sucks the harmful gas, thus limiting the discharge of harmful gas that is heavier than air. There is a problem that there is.

Accordingly, in Korean Patent Publication No. 10-0875206 (name of the invention: a fume hood facility system and a tee line nozzle spray type air curtain of the system), referring to FIGS. 1 and 2, a chamber 12 having a constant volume is formed. The housing 10 to be formed, the door 14 to slide up and down to open and close the opening in the front of the housing 10, the built in the upper portion of the housing 10 is generated due to the experiment inside the chamber 12 A blower 18 formed to suck air containing harmful gas through the suction duct 16, a discharge duct 20 for discharging air containing harmful gas sucked from the blower 18 to the outside, and the A fume type fume including a T-line air curtain 22 installed above the door 14 inside the housing 10 to control the amount of indoor air by injecting air introduced from the outside into the chamber 12. A hood installation system is disclosed. The fume hood facility system calculates the amount of fume hood by optimizing the amount of air discharged from the blower, the amount of harmful gas generated in the experiment, the amount of air injected from the T-line air curtain, and the amount of indoor air from the experimental values and by adjusting the amount of the fume hood. It is possible to save a large amount of harmful gases and odors from entering the room, thereby saving energy and improving the indoor environment.

However, as shown in FIG. 2, the air flow injected from the T-shaped air curtain of the T-line air curtain provided in the upper part of the door of the fume hood installation system is a popular type fume hood having an opening and a door formed on only one side. It is applicable only to the air conditioner, and in order to prevent leakage of harmful gases and odors generated during internal work, there is a problem of discharging 5-15% of indoor air to the exhaust fan.

In addition, the T-line air curtain with a single-shaped air injector of a certain length can be applied only to the entry-type fume hood having an opening and a door on only one side, and can be applied to a plurality of sides such as a booth type, a chamber type, a hat type fume hood, etc. In the fume hood facility system in which the openings and the doors are respectively formed in the fume hood installation system, the air curtain airflow injected from the T-shaped air curtain's single-shaped air inlet port is discharged immediately by the exhaust fan without covering the front of the opening. Most of the harmful gases and odors therein are not discharged to the outside through the discharge duct, but flow out into the room through the openings.

Accordingly, an object of the present invention is to form an air curtain to cover the front of the opening by injecting air from each nozzle of the nozzle injection type upper air curtain device of the fume hood system having openings and doors respectively formed on a plurality of side surfaces, the air curtain It is to provide an air-tight fume hood system that can prevent the outflow of harmful gases, odors indoors by effectively air-sealing the front of the opening by injecting the air flow into the discharge duct by the air flow injection of the rotary air line lower air curtain device.

In order to achieve the above object, in the present invention, the housing is formed in the enclosure shape to discharge the toxic gas, odor to the outside to form a chamber, the housing is formed, the opening and closing to open and close each opening of the plurality of sides of the housing A fume hood system comprising a door, a blower built in an upper portion of the housing to suck air in a chamber, and a discharge duct for discharging air sucked by the blower to the outside, wherein the fume hood system is installed at an inner upper portion of the door and fixed at a lower portion thereof. Nozzle spraying upper air curtain apparatus which nozzles arrange | positioned at intervals are formed in the angle of 1-75 degree toward the outside from directly under a door; And a rotary tee line lower air curtain device installed outside the lower end of the opening and configured to automatically hinge the air inlet toward the inside of the door as the door descends.

The air-tight fume hood system according to the present invention effectively improves the indoor environment by preventing air from leaking harmful gases and odors by effectively air-sealing the entire opening portion by an air curtain, thereby improving work efficiency by creating researchers' health and pleasant environment. It has the effect of supporting it.

In addition, the air-tight fume hood system of the present invention effectively provides air curtains on the front surfaces of the plurality of openings in the booth, chamber, and hat type fume hood systems in which openings and doors are formed on a plurality of sides, thereby improving the utilization of the fume hood. It has the effect of supporting improvement.

The present invention is an improved invention of Korean Patent Publication No. 10-0875206 (Invention: Fume hood facility system and T-line nozzle spray type air curtain of the system) having the same applicant, wherein openings and doors are formed on a plurality of sides, respectively. The air curtain is formed outside the door in the nozzle spray type upper air curtain device installed on the inner upper side of the door of the fume hood system, and the air curtain airflow is applied to the air flow spray of the rotary tee line lower air curtain device installed outside the lower end of the opening. It is a technical idea to provide a fume hood system which is configured to guide air into the discharge duct and effectively air seal the entire surface of the opening of the housing.

To this end, the air-tight fume hood system of the present invention comprises a housing 10 having a constant volume chamber 12 formed in a shape of a hexahedron to embed the main components and a center for a researcher to conduct experiments, The door 14 which slides to open and close the openings of the plural sides of the housing 10 to move up and down, and the harmful gas generated due to the experiment inside the chamber 12 are built in the upper part of the housing 10. A fume hood system including a blower 18 formed to suck the air included through the suction duct 16, and an exhaust duct 20 for discharging air containing harmful gas sucked from the blower 18 to the outside. At, the nozzle injection type upper air curtain device to form an air curtain to the outside of each door 14, and the lower rotary tee line to guide the air curtain air flow to the discharge duct 20 by air flow injection The air curtain device is configured.

With reference to the drawings and preferred embodiments, the air-sealed fume hood system of the present invention will be described in detail. However, the said Example is those which illustrate this invention in detail, and does not limit this invention.

Figure 3 shows a perspective structure of the air sealed fume hood system according to an embodiment of the present invention, Figure 4 is a cross-sectional view of the AA 'of Figure 3, Figure 5 is an air sealed fume hood system of the present invention Figure 6 shows the overall structure of the upper air curtain device of Figure 6 is a cross-sectional view of the AA 'of Figure 5, Figure 7 shows the flow of air curtain by the upper air curtain device of the present invention, 8 shows a perspective structure of the lower air curtain device of the air sealed fume hood system of the present invention, and FIG. 9 shows the spraying and air flow of the air curtain at the door opening of the air sealed fume hood system of the present invention. FIG. 10 is a view illustrating the spraying and air flow of the air curtain when the door is partially closed in the airtight fume hood system of the present invention.

3 to 10, first, the air-tight fume hood system of the present invention is a nozzle injection type upper air curtain device is installed so that the nozzles are installed on the inner upper side of the door and disposed at regular intervals on the lower side toward the outer direction of the door. Included.

A nozzle 31 for forming an air curtain covering the opening by injecting airflow at a strong pressure in the outward direction of the door to the inner upper portion of the door 14, which slides to open and close the opening of the front of the housing 10 to move up and down. The nozzle spray type upper air curtain device 30 is formed.

If the upper air curtain device 30 is configured on the outer upper part of the door 14 rather than the inner upper part of the door 14, the airflow emitted from the upper air curtain device does not form an air curtain covering the opening, The jetted air flow is immediately dissipated and dissipated into the room, so that a large part of the air volume inside the chamber is not discharged to the outside through the suction duct 16, the blower 18, and the discharge duct 20, It flows out into the room through the opening. Similarly, when the air flow is sprayed in the upper air curtain device 30 in the direct direction or the door inward direction instead of the door outward direction, the injected air flow does not form an air curtain covering the opening, but is directly intake duct 16. , Short-circuit phenomenon is discharged to the outside through the blower 18, the discharge duct 20, so that a substantial portion of the air volume inside the chamber through the suction duct 16, the blower 18, the discharge duct 20 It is not discharged to the outside, but flows into the room through the opening.

Therefore, in the present invention, the nozzle spray type upper air curtain device 30 is installed on the inner upper side of the door, and the nozzles 31 are disposed at regular intervals under the upper air curtain device 30, and the respective nozzles 31 ) Is configured to face the door outward at a constant angle to form an air curtain covering the door (14).

The nozzle spray type upper air curtain device 30 forming the air curtain includes a blower fan 28 for supplying external air, an external air supply duct 24 for supplying external air supplied from the blower fan 28 to the injector, The injector 32 compresses the air in a downward direction while suppressing the vortex of the supplied air, which is formed in a V-shaped shape having a rectangular shape as a whole, to uniformly distribute the guided air introduced into the injector 32. At least one air distribution guide 33 is formed, and a plurality of nozzles 31 are formed at regular intervals to spray the air guided by the air distribution guide 33, the plurality of nozzles 31 It is formed at an angle from directly under the door to the outside.

When the nozzle 31 at the lower part of the nozzle spray type upper air curtain device is formed at an angle of less than 1 degree from directly under the door to the outside, the airflow sprayed from the nozzle does not form an air curtain, but directly removes the suction duct, the blower, and the discharge duct. The short-circuit phenomenon discharged to the outside occurs, and when the nozzle 31 of the lower part of the nozzle spray type upper air curtain device is formed at an angle exceeding 75 degrees from underneath the door to the outside, the airflow injected from the nozzle forms the air curtain. Since it is distributed to the room without, each nozzle 31 of the lower part of the nozzle injection type upper air curtain apparatus 30 is formed in the angle of 1-75 degree toward the outside from directly under a door.

As described above, the air flow injected from each nozzle 31 formed at a predetermined interval from the lower portion of the nozzle injection type upper air curtain device 30 at an angle of 1 to 75 degrees from directly under the door to the outside expands, and FIG. As shown in FIG. 7, an air pressure 35 similar to a bowling pin is formed, and the air pressure 35 and the air pressure 35 partially overlap. At this time, the venturi effect is generated by the airflow injected from the nozzle 31, and the attracted airflow 36 through which air between the nozzle 31 and the nozzle 31 joins the air pressure 35 is formed. The attraction air stream 36 forms an air curtain by air sealing the gap between the air pressure 35 and the air pressure 35.

Specifically, the airflow injected from the nozzle 31 slowly expands and passes at a high speed through the section A adjacent to the nozzle 31 at high speed, and the air between the nozzle 31 and the nozzle 31 is generated by the Venturi effect. Is converted into a strong attraction air stream 36 and joins the air pressure 35 at a high speed, whereby the air sealing effect is exhibited. The air pressure 35 passing through the section A is rapidly expanded in the next section B, and the wind speed decreases. As the wind speed decreases, the wind and wind speed of the manned air stream 36 also decrease. At the lower end of the expansion of the air pressure 35 is stopped. The air pressure 35 and the air pressure 35 in which the expansion is stopped are partially overlapped in section C, and an air curtain is formed. The air pressure 35 receives air resistance in section C, and the wind speed begins to decrease, thereby ending the role of the air curtain at the lower end of section D, and the air pressure 35 in which the role of the air curtain ends is lowered in the rotary tee line. It is led to the suction duct 16 by the airflow injection of the air curtain device 40.

That is, the air pressure 35 joins the air pressure 35 injected from each nozzle 31 under the nozzle injection type upper air curtain device, and the air pressure 35 in which the attract air flow 36 is joined. And the air pressure 35 partially overlap to form an air curtain that effectively air seals the entire surface of the opening of the fume hood, wherein the air curtain is guided by the airflow injection of the rotary airline lower air curtain device 40, It is sucked by the blower 18 and discharged to the outside via the discharge duct 20.

In addition, the air-tight fume hood system of the present invention includes a rotary tee line lower air curtain device which is installed outside the lower end of the opening and formed so that the air injection port is automatically hinged in the door direction as the door descends.

The air curtain formed by the nozzle 31 of the nozzle spray type upper air curtain device is introduced into the chamber 12 by the suction force of the blower 18 and is exhausted to the outside through the suction duct 16 and the discharge duct 20. do. A device for separately injecting airflow to facilitate the inflow of the air curtain 12 into the intake duct 16 is formed outside the bottom of the opening.

However, as the door 14 is raised and the opening is opened, the air curtain is easily introduced into the chamber 12 by the suction force of the blower 18, but a considerable amount of empty section occurs at the bottom of the air curtain. This tends to cause a problem that some of the harmful gas and odor inside the chamber 12 is leaked into the room. On the other hand, as the door 14 is lowered and the opening is closed, the air pressure 35 injected from the nozzle 31 tends to disperse prematurely, thereby preventing the air curtain from being properly formed. Accordingly, the inside of the chamber 12 Hazardous gases, some of the bad smell will be caused to leak into the room.

In order to solve the problems described above, in the present invention is automatically hinged according to the elevation of the door 14, the angle is adjusted, the rotary tea line lower air curtain device 40 having a one-shaped air injection port 41 Is formed outside the bottom of the opening.

That is, the rotary tee line lower air curtain device 40 formed on the outside of the lower end of the opening, and the door 14 for lifting up and down to open and close the opening are known techniques, for example, mechanical linkage means such as rack & pinion gear, or The rotary teeline lower air curtain device 40 is configured to be automatically bidirectionally hinged as the door 14 moves up and down by being connected by electrical linkage means such as a distance sensor and a servo mechanism.

When the door 14 is raised while the air curtain is formed by being sprayed from the nozzle 31 of the nozzle spray type upper air curtain device, the rotary tee line lower air curtain device 40 is proportional to the rising length of the door 14. It is automatically hinged so that the air injection port 41 faces the door 14 in the vertical direction. Airflow injected from the air inlet 41 of the rotary tee line lower air curtain device facilitates the inflow of the air curtain into the chamber 12, and in particular, a significant gap between the lower part of the air curtain. Cover to help airtight the front of the opening.

On the other hand, when the door 14 descends while being sprayed from the nozzle 31 of the nozzle spray type upper air curtain device and the air curtain is formed, the rotary tee line lower air curtain device 40 is proportional to the falling length of the door 14. ) Is automatically hinged so that the air injection port 41 faces the horizontal direction. The airflow injected from the air injection port 41 of the rotary tee line lower air curtain device facilitates the inflow of the air curtain into the chamber 12 and helps to seal the front of the opening.

In conclusion, the rotary tee line lower air curtain device 40, regardless of the elevation of the door 14 and the opening and closing degree of the opening 14, the air curtain by the air flow injection to the suction duct 16, the blower 18, the discharge duct ( 20 to be discharged to the outdoors, and at the same time to cover the empty section of the lower end of the air curtain, to effectively air-sealing the entire opening portion of the housing (10).

As described above, the present invention includes a nozzle sprayed upper air curtain device for forming an air curtain in an opening, and a rotary tee line lower air curtain device for guiding the air curtain airflow into the discharge duct by the jet flow. The air-tight fume hood system effectively seals the openings by air curtains to prevent the escape of harmful gases and odors, thereby improving the indoor environment and improving the work efficiency by creating researchers' health and pleasant environment.

In the above embodiment, the fume hood in which the door and the opening are formed on one side has been described. However, the fume hood in which the door and the opening are formed in the plurality of side surfaces may be applied without departing from the scope of the present invention.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by those skilled in the art without departing from the gist of the present invention as claimed in the claims. Of course, such changes will fall within the scope of the claims.

1 is a perspective view of a conventional fume hood system.

FIG. 2 is a cross-sectional view taken along line AA ′ of FIG. 1.

Figure 3 is a perspective view of an air sealed fume hood system according to an embodiment of the present invention

4 is a cross-sectional view taken along line AA ′ of FIG. 3.

5 is an overall structural diagram of an upper air curtain device of the airtight fume hood system of the present invention;

6 is a cross-sectional view taken along line AA ′ of FIG. 5.

7 is a flowchart of an air curtain by the upper air curtain device of the present invention.

8 is a perspective view of a lower air curtain device of the airtight fume hood system of the present invention;

9 is a flow chart and air flow chart of the air curtain at the door opening of the air sealed fume hood system of the present invention.

10 is a flow chart and air flow chart of the air curtain when the door is closed in the airtight fume hood system of the present invention.

* Explanation of symbols for the main parts of the drawings

10 housing 12 chamber

14 door 16 suction duct

18: blower 20: exhaust duct

22: T-line air curtain 24: External air supply duct

28: blower fan 30: upper air curtain device

31: nozzle 32: injector

33: air distribution guide 35: air pressure

36: manned air flow 40: lower air curtain device

41: air nozzle

Claims (3)

It is installed indoors and is formed in a housing shape to discharge toxic gases and odors to the outside, the housing is formed in the chamber, the door to move up and down to open and close each opening of the plurality of sides of the housing, built in the upper portion of the housing air In the fume hood system comprising a blower for sucking the exhaust duct for discharging the air sucked by the blower to the outside, A nozzle injection type upper air curtain device installed at an inner upper portion of the door and disposed at regular intervals below the nozzle at an angle of 1 to 75 degrees from directly under the door to the outside; And A rotary tee line lower air curtain device installed outside the lower end of the opening and configured to automatically hinge the air inlet toward the inside of the door as the door descends, The nozzle spray type upper air curtain device A blowing fan for supplying outside air; An external air supply duct for supplying external air supplied from the blower fan to the injector; An injector formed in a V-shape having a rectangular shape and compressing air in a downward direction while suppressing a vortex of the supplied air; At least one air distribution guide formed to guide and uniformly distribute the air introduced into the injector; And It comprises a plurality of nozzles are arranged at regular intervals so as to spray the air guided in the air distribution guide and formed at an angle of 1 to 75 degrees from directly under the door toward the outside, The rotary tee line lower air curtain device guides the air curtain to the suction duct, the blower, and the discharge duct by airflow, irrespective of the elevation of the door and the opening / closing degree of the opening. Air-sealed fume hood system, characterized in that for air sealing the entire surface of the opening of the housing by covering the blank section of the lower end of the air curtain. delete delete

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